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linux-zen-server/fs/ksmbd/smb2pdu.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
*/
#include <linux/inetdevice.h>
#include <net/addrconf.h>
#include <linux/syscalls.h>
#include <linux/namei.h>
#include <linux/statfs.h>
#include <linux/ethtool.h>
#include <linux/falloc.h>
#include <linux/mount.h>
#include <linux/filelock.h>
#include "glob.h"
#include "smbfsctl.h"
#include "oplock.h"
#include "smbacl.h"
#include "auth.h"
#include "asn1.h"
#include "connection.h"
#include "transport_ipc.h"
#include "transport_rdma.h"
#include "vfs.h"
#include "vfs_cache.h"
#include "misc.h"
#include "server.h"
#include "smb_common.h"
#include "smbstatus.h"
#include "ksmbd_work.h"
#include "mgmt/user_config.h"
#include "mgmt/share_config.h"
#include "mgmt/tree_connect.h"
#include "mgmt/user_session.h"
#include "mgmt/ksmbd_ida.h"
#include "ndr.h"
static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
{
if (work->next_smb2_rcv_hdr_off) {
*req = ksmbd_req_buf_next(work);
*rsp = ksmbd_resp_buf_next(work);
} else {
*req = smb2_get_msg(work->request_buf);
*rsp = smb2_get_msg(work->response_buf);
}
}
#define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
/**
* check_session_id() - check for valid session id in smb header
* @conn: connection instance
* @id: session id from smb header
*
* Return: 1 if valid session id, otherwise 0
*/
static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
{
struct ksmbd_session *sess;
if (id == 0 || id == -1)
return false;
sess = ksmbd_session_lookup_all(conn, id);
if (sess)
return true;
pr_err("Invalid user session id: %llu\n", id);
return false;
}
struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
{
return xa_load(&sess->ksmbd_chann_list, (long)conn);
}
/**
* smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
* @work: smb work
*
* Return: 0 if there is a tree connection matched or these are
* skipable commands, otherwise error
*/
int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
{
struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
unsigned int cmd = le16_to_cpu(req_hdr->Command);
int tree_id;
work->tcon = NULL;
if (cmd == SMB2_TREE_CONNECT_HE ||
cmd == SMB2_CANCEL_HE ||
cmd == SMB2_LOGOFF_HE) {
ksmbd_debug(SMB, "skip to check tree connect request\n");
return 0;
}
if (xa_empty(&work->sess->tree_conns)) {
ksmbd_debug(SMB, "NO tree connected\n");
return -ENOENT;
}
tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
if (!work->tcon) {
pr_err("Invalid tid %d\n", tree_id);
return -EINVAL;
}
return 1;
}
/**
* smb2_set_err_rsp() - set error response code on smb response
* @work: smb work containing response buffer
*/
void smb2_set_err_rsp(struct ksmbd_work *work)
{
struct smb2_err_rsp *err_rsp;
if (work->next_smb2_rcv_hdr_off)
err_rsp = ksmbd_resp_buf_next(work);
else
err_rsp = smb2_get_msg(work->response_buf);
if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
err_rsp->ErrorContextCount = 0;
err_rsp->Reserved = 0;
err_rsp->ByteCount = 0;
err_rsp->ErrorData[0] = 0;
inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
}
}
/**
* is_smb2_neg_cmd() - is it smb2 negotiation command
* @work: smb work containing smb header
*
* Return: true if smb2 negotiation command, otherwise false
*/
bool is_smb2_neg_cmd(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
/* is it SMB2 header ? */
if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
return false;
/* make sure it is request not response message */
if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
return false;
if (hdr->Command != SMB2_NEGOTIATE)
return false;
return true;
}
/**
* is_smb2_rsp() - is it smb2 response
* @work: smb work containing smb response buffer
*
* Return: true if smb2 response, otherwise false
*/
bool is_smb2_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
/* is it SMB2 header ? */
if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
return false;
/* make sure it is response not request message */
if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
return false;
return true;
}
/**
* get_smb2_cmd_val() - get smb command code from smb header
* @work: smb work containing smb request buffer
*
* Return: smb2 request command value
*/
u16 get_smb2_cmd_val(struct ksmbd_work *work)
{
struct smb2_hdr *rcv_hdr;
if (work->next_smb2_rcv_hdr_off)
rcv_hdr = ksmbd_req_buf_next(work);
else
rcv_hdr = smb2_get_msg(work->request_buf);
return le16_to_cpu(rcv_hdr->Command);
}
/**
* set_smb2_rsp_status() - set error response code on smb2 header
* @work: smb work containing response buffer
* @err: error response code
*/
void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
{
struct smb2_hdr *rsp_hdr;
if (work->next_smb2_rcv_hdr_off)
rsp_hdr = ksmbd_resp_buf_next(work);
else
rsp_hdr = smb2_get_msg(work->response_buf);
rsp_hdr->Status = err;
smb2_set_err_rsp(work);
}
/**
* init_smb2_neg_rsp() - initialize smb2 response for negotiate command
* @work: smb work containing smb request buffer
*
* smb2 negotiate response is sent in reply of smb1 negotiate command for
* dialect auto-negotiation.
*/
int init_smb2_neg_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *rsp_hdr;
struct smb2_negotiate_rsp *rsp;
struct ksmbd_conn *conn = work->conn;
*(__be32 *)work->response_buf =
cpu_to_be32(conn->vals->header_size);
rsp_hdr = smb2_get_msg(work->response_buf);
memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
rsp_hdr->CreditRequest = cpu_to_le16(2);
rsp_hdr->Command = SMB2_NEGOTIATE;
rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
rsp_hdr->NextCommand = 0;
rsp_hdr->MessageId = 0;
rsp_hdr->Id.SyncId.ProcessId = 0;
rsp_hdr->Id.SyncId.TreeId = 0;
rsp_hdr->SessionId = 0;
memset(rsp_hdr->Signature, 0, 16);
rsp = smb2_get_msg(work->response_buf);
WARN_ON(ksmbd_conn_good(conn));
rsp->StructureSize = cpu_to_le16(65);
ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
rsp->DialectRevision = cpu_to_le16(conn->dialect);
/* Not setting conn guid rsp->ServerGUID, as it
* not used by client for identifying connection
*/
rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
/* Default Max Message Size till SMB2.0, 64K*/
rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
rsp->SystemTime = cpu_to_le64(ksmbd_systime());
rsp->ServerStartTime = 0;
rsp->SecurityBufferOffset = cpu_to_le16(128);
rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
le16_to_cpu(rsp->SecurityBufferOffset));
inc_rfc1001_len(work->response_buf,
sizeof(struct smb2_negotiate_rsp) -
sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH);
rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
conn->use_spnego = true;
ksmbd_conn_set_need_negotiate(conn);
return 0;
}
/**
* smb2_set_rsp_credits() - set number of credits in response buffer
* @work: smb work containing smb response buffer
*/
int smb2_set_rsp_credits(struct ksmbd_work *work)
{
struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
struct ksmbd_conn *conn = work->conn;
unsigned short credits_requested, aux_max;
unsigned short credit_charge, credits_granted = 0;
if (work->send_no_response)
return 0;
hdr->CreditCharge = req_hdr->CreditCharge;
if (conn->total_credits > conn->vals->max_credits) {
hdr->CreditRequest = 0;
pr_err("Total credits overflow: %d\n", conn->total_credits);
return -EINVAL;
}
credit_charge = max_t(unsigned short,
le16_to_cpu(req_hdr->CreditCharge), 1);
if (credit_charge > conn->total_credits) {
ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
credit_charge, conn->total_credits);
return -EINVAL;
}
conn->total_credits -= credit_charge;
conn->outstanding_credits -= credit_charge;
credits_requested = max_t(unsigned short,
le16_to_cpu(req_hdr->CreditRequest), 1);
/* according to smb2.credits smbtorture, Windows server
* 2016 or later grant up to 8192 credits at once.
*
* TODO: Need to adjuct CreditRequest value according to
* current cpu load
*/
if (hdr->Command == SMB2_NEGOTIATE)
aux_max = 1;
else
aux_max = conn->vals->max_credits - conn->total_credits;
credits_granted = min_t(unsigned short, credits_requested, aux_max);
conn->total_credits += credits_granted;
work->credits_granted += credits_granted;
if (!req_hdr->NextCommand) {
/* Update CreditRequest in last request */
hdr->CreditRequest = cpu_to_le16(work->credits_granted);
}
ksmbd_debug(SMB,
"credits: requested[%d] granted[%d] total_granted[%d]\n",
credits_requested, credits_granted,
conn->total_credits);
return 0;
}
/**
* init_chained_smb2_rsp() - initialize smb2 chained response
* @work: smb work containing smb response buffer
*/
static void init_chained_smb2_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *req = ksmbd_req_buf_next(work);
struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
struct smb2_hdr *rsp_hdr;
struct smb2_hdr *rcv_hdr;
int next_hdr_offset = 0;
int len, new_len;
/* Len of this response = updated RFC len - offset of previous cmd
* in the compound rsp
*/
/* Storing the current local FID which may be needed by subsequent
* command in the compound request
*/
if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
work->compound_sid = le64_to_cpu(rsp->SessionId);
}
len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
next_hdr_offset = le32_to_cpu(req->NextCommand);
new_len = ALIGN(len, 8);
inc_rfc1001_len(work->response_buf,
sizeof(struct smb2_hdr) + new_len - len);
rsp->NextCommand = cpu_to_le32(new_len);
work->next_smb2_rcv_hdr_off += next_hdr_offset;
work->next_smb2_rsp_hdr_off += new_len;
ksmbd_debug(SMB,
"Compound req new_len = %d rcv off = %d rsp off = %d\n",
new_len, work->next_smb2_rcv_hdr_off,
work->next_smb2_rsp_hdr_off);
rsp_hdr = ksmbd_resp_buf_next(work);
rcv_hdr = ksmbd_req_buf_next(work);
if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
ksmbd_debug(SMB, "related flag should be set\n");
work->compound_fid = KSMBD_NO_FID;
work->compound_pfid = KSMBD_NO_FID;
}
memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
rsp_hdr->Command = rcv_hdr->Command;
/*
* Message is response. We don't grant oplock yet.
*/
rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
SMB2_FLAGS_RELATED_OPERATIONS);
rsp_hdr->NextCommand = 0;
rsp_hdr->MessageId = rcv_hdr->MessageId;
rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
rsp_hdr->SessionId = rcv_hdr->SessionId;
memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
}
/**
* is_chained_smb2_message() - check for chained command
* @work: smb work containing smb request buffer
*
* Return: true if chained request, otherwise false
*/
bool is_chained_smb2_message(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
unsigned int len, next_cmd;
if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
return false;
hdr = ksmbd_req_buf_next(work);
next_cmd = le32_to_cpu(hdr->NextCommand);
if (next_cmd > 0) {
if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
__SMB2_HEADER_STRUCTURE_SIZE >
get_rfc1002_len(work->request_buf)) {
pr_err("next command(%u) offset exceeds smb msg size\n",
next_cmd);
return false;
}
if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
work->response_sz) {
pr_err("next response offset exceeds response buffer size\n");
return false;
}
ksmbd_debug(SMB, "got SMB2 chained command\n");
init_chained_smb2_rsp(work);
return true;
} else if (work->next_smb2_rcv_hdr_off) {
/*
* This is last request in chained command,
* align response to 8 byte
*/
len = ALIGN(get_rfc1002_len(work->response_buf), 8);
len = len - get_rfc1002_len(work->response_buf);
if (len) {
ksmbd_debug(SMB, "padding len %u\n", len);
inc_rfc1001_len(work->response_buf, len);
if (work->aux_payload_sz)
work->aux_payload_sz += len;
}
}
return false;
}
/**
* init_smb2_rsp_hdr() - initialize smb2 response
* @work: smb work containing smb request buffer
*
* Return: 0
*/
int init_smb2_rsp_hdr(struct ksmbd_work *work)
{
struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
struct ksmbd_conn *conn = work->conn;
memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
*(__be32 *)work->response_buf =
cpu_to_be32(conn->vals->header_size);
rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
rsp_hdr->Command = rcv_hdr->Command;
/*
* Message is response. We don't grant oplock yet.
*/
rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
rsp_hdr->NextCommand = 0;
rsp_hdr->MessageId = rcv_hdr->MessageId;
rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
rsp_hdr->SessionId = rcv_hdr->SessionId;
memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
return 0;
}
/**
* smb2_allocate_rsp_buf() - allocate smb2 response buffer
* @work: smb work containing smb request buffer
*
* Return: 0 on success, otherwise -ENOMEM
*/
int smb2_allocate_rsp_buf(struct ksmbd_work *work)
{
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
size_t large_sz = small_sz + work->conn->vals->max_trans_size;
size_t sz = small_sz;
int cmd = le16_to_cpu(hdr->Command);
if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
sz = large_sz;
if (cmd == SMB2_QUERY_INFO_HE) {
struct smb2_query_info_req *req;
req = smb2_get_msg(work->request_buf);
if ((req->InfoType == SMB2_O_INFO_FILE &&
(req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
req->FileInfoClass == FILE_ALL_INFORMATION)) ||
req->InfoType == SMB2_O_INFO_SECURITY)
sz = large_sz;
}
/* allocate large response buf for chained commands */
if (le32_to_cpu(hdr->NextCommand) > 0)
sz = large_sz;
work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
if (!work->response_buf)
return -ENOMEM;
work->response_sz = sz;
return 0;
}
/**
* smb2_check_user_session() - check for valid session for a user
* @work: smb work containing smb request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_check_user_session(struct ksmbd_work *work)
{
struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
struct ksmbd_conn *conn = work->conn;
unsigned int cmd = conn->ops->get_cmd_val(work);
unsigned long long sess_id;
work->sess = NULL;
/*
* SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
* require a session id, so no need to validate user session's for
* these commands.
*/
if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
cmd == SMB2_SESSION_SETUP_HE)
return 0;
if (!ksmbd_conn_good(conn))
return -EINVAL;
sess_id = le64_to_cpu(req_hdr->SessionId);
/* Check for validity of user session */
work->sess = ksmbd_session_lookup_all(conn, sess_id);
if (work->sess)
return 1;
ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
return -EINVAL;
}
static void destroy_previous_session(struct ksmbd_conn *conn,
struct ksmbd_user *user, u64 id)
{
struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
struct ksmbd_user *prev_user;
struct channel *chann;
long index;
if (!prev_sess)
return;
prev_user = prev_sess->user;
if (!prev_user ||
strcmp(user->name, prev_user->name) ||
user->passkey_sz != prev_user->passkey_sz ||
memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
return;
prev_sess->state = SMB2_SESSION_EXPIRED;
xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
ksmbd_conn_set_exiting(chann->conn);
}
/**
* smb2_get_name() - get filename string from on the wire smb format
* @src: source buffer
* @maxlen: maxlen of source string
* @local_nls: nls_table pointer
*
* Return: matching converted filename on success, otherwise error ptr
*/
static char *
smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
{
char *name;
name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
if (IS_ERR(name)) {
pr_err("failed to get name %ld\n", PTR_ERR(name));
return name;
}
ksmbd_conv_path_to_unix(name);
ksmbd_strip_last_slash(name);
return name;
}
int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
{
struct smb2_hdr *rsp_hdr;
struct ksmbd_conn *conn = work->conn;
int id;
rsp_hdr = smb2_get_msg(work->response_buf);
rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
id = ksmbd_acquire_async_msg_id(&conn->async_ida);
if (id < 0) {
pr_err("Failed to alloc async message id\n");
return id;
}
work->asynchronous = true;
work->async_id = id;
rsp_hdr->Id.AsyncId = cpu_to_le64(id);
ksmbd_debug(SMB,
"Send interim Response to inform async request id : %d\n",
work->async_id);
work->cancel_fn = fn;
work->cancel_argv = arg;
if (list_empty(&work->async_request_entry)) {
spin_lock(&conn->request_lock);
list_add_tail(&work->async_request_entry, &conn->async_requests);
spin_unlock(&conn->request_lock);
}
return 0;
}
void release_async_work(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
spin_lock(&conn->request_lock);
list_del_init(&work->async_request_entry);
spin_unlock(&conn->request_lock);
work->asynchronous = 0;
work->cancel_fn = NULL;
kfree(work->cancel_argv);
work->cancel_argv = NULL;
if (work->async_id) {
ksmbd_release_id(&conn->async_ida, work->async_id);
work->async_id = 0;
}
}
void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
{
struct smb2_hdr *rsp_hdr;
rsp_hdr = smb2_get_msg(work->response_buf);
smb2_set_err_rsp(work);
rsp_hdr->Status = status;
work->multiRsp = 1;
ksmbd_conn_write(work);
rsp_hdr->Status = 0;
work->multiRsp = 0;
}
static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
{
if (S_ISDIR(mode) || S_ISREG(mode))
return 0;
if (S_ISLNK(mode))
return IO_REPARSE_TAG_LX_SYMLINK_LE;
else if (S_ISFIFO(mode))
return IO_REPARSE_TAG_LX_FIFO_LE;
else if (S_ISSOCK(mode))
return IO_REPARSE_TAG_AF_UNIX_LE;
else if (S_ISCHR(mode))
return IO_REPARSE_TAG_LX_CHR_LE;
else if (S_ISBLK(mode))
return IO_REPARSE_TAG_LX_BLK_LE;
return 0;
}
/**
* smb2_get_dos_mode() - get file mode in dos format from unix mode
* @stat: kstat containing file mode
* @attribute: attribute flags
*
* Return: converted dos mode
*/
static int smb2_get_dos_mode(struct kstat *stat, int attribute)
{
int attr = 0;
if (S_ISDIR(stat->mode)) {
attr = FILE_ATTRIBUTE_DIRECTORY |
(attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
} else {
attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
FILE_SUPPORTS_SPARSE_FILES))
attr |= FILE_ATTRIBUTE_SPARSE_FILE;
if (smb2_get_reparse_tag_special_file(stat->mode))
attr |= FILE_ATTRIBUTE_REPARSE_POINT;
}
return attr;
}
static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
__le16 hash_id)
{
pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
pneg_ctxt->DataLength = cpu_to_le16(38);
pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
pneg_ctxt->HashAlgorithms = hash_id;
}
static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
__le16 cipher_type)
{
pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
pneg_ctxt->DataLength = cpu_to_le16(4);
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->CipherCount = cpu_to_le16(1);
pneg_ctxt->Ciphers[0] = cipher_type;
}
static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
__le16 comp_algo)
{
pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
pneg_ctxt->DataLength =
cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
- sizeof(struct smb2_neg_context));
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
pneg_ctxt->Flags = cpu_to_le32(0);
pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
}
static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
__le16 sign_algo)
{
pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
pneg_ctxt->DataLength =
cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
- sizeof(struct smb2_neg_context));
pneg_ctxt->Reserved = cpu_to_le32(0);
pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
pneg_ctxt->SigningAlgorithms[0] = sign_algo;
}
static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
{
pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
pneg_ctxt->Name[0] = 0x93;
pneg_ctxt->Name[1] = 0xAD;
pneg_ctxt->Name[2] = 0x25;
pneg_ctxt->Name[3] = 0x50;
pneg_ctxt->Name[4] = 0x9C;
pneg_ctxt->Name[5] = 0xB4;
pneg_ctxt->Name[6] = 0x11;
pneg_ctxt->Name[7] = 0xE7;
pneg_ctxt->Name[8] = 0xB4;
pneg_ctxt->Name[9] = 0x23;
pneg_ctxt->Name[10] = 0x83;
pneg_ctxt->Name[11] = 0xDE;
pneg_ctxt->Name[12] = 0x96;
pneg_ctxt->Name[13] = 0x8B;
pneg_ctxt->Name[14] = 0xCD;
pneg_ctxt->Name[15] = 0x7C;
}
static void assemble_neg_contexts(struct ksmbd_conn *conn,
struct smb2_negotiate_rsp *rsp,
void *smb2_buf_len)
{
char *pneg_ctxt = (char *)rsp +
le32_to_cpu(rsp->NegotiateContextOffset);
int neg_ctxt_cnt = 1;
int ctxt_size;
ksmbd_debug(SMB,
"assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
conn->preauth_info->Preauth_HashId);
rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
ctxt_size = sizeof(struct smb2_preauth_neg_context);
/* Round to 8 byte boundary */
pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
if (conn->cipher_type) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
conn->cipher_type);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
/* Round to 8 byte boundary */
pneg_ctxt +=
round_up(sizeof(struct smb2_encryption_neg_context) + 2,
8);
}
if (conn->compress_algorithm) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_COMPRESSION_CAPABILITIES context\n");
/* Temporarily set to SMB3_COMPRESS_NONE */
build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
conn->compress_algorithm);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
/* Round to 8 byte boundary */
pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
8);
}
if (conn->posix_ext_supported) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_posix_neg_context);
/* Round to 8 byte boundary */
pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
}
if (conn->signing_negotiated) {
ctxt_size = round_up(ctxt_size, 8);
ksmbd_debug(SMB,
"assemble SMB2_SIGNING_CAPABILITIES context\n");
build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
conn->signing_algorithm);
rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
}
inc_rfc1001_len(smb2_buf_len, ctxt_size);
}
static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
struct smb2_preauth_neg_context *pneg_ctxt,
int ctxt_len)
{
/*
* sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
* which may not be present. Only check for used HashAlgorithms[1].
*/
if (ctxt_len <
sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
return STATUS_INVALID_PARAMETER;
if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
return STATUS_SUCCESS;
}
static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
struct smb2_encryption_neg_context *pneg_ctxt,
int ctxt_len)
{
int cph_cnt;
int i, cphs_size;
if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
return;
}
conn->cipher_type = 0;
cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
cphs_size = cph_cnt * sizeof(__le16);
if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
ctxt_len) {
pr_err("Invalid cipher count(%d)\n", cph_cnt);
return;
}
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
return;
for (i = 0; i < cph_cnt; i++) {
if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
pneg_ctxt->Ciphers[i]);
conn->cipher_type = pneg_ctxt->Ciphers[i];
break;
}
}
}
/**
* smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
* @conn: smb connection
*
* Return: true if connection should be encrypted, else false
*/
bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
{
if (!conn->ops->generate_encryptionkey)
return false;
/*
* SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
* SMB 3.1.1 uses the cipher_type field.
*/
return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
conn->cipher_type;
}
static void decode_compress_ctxt(struct ksmbd_conn *conn,
struct smb2_compression_capabilities_context *pneg_ctxt)
{
conn->compress_algorithm = SMB3_COMPRESS_NONE;
}
static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
struct smb2_signing_capabilities *pneg_ctxt,
int ctxt_len)
{
int sign_algo_cnt;
int i, sign_alos_size;
if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
return;
}
conn->signing_negotiated = false;
sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
sign_alos_size = sign_algo_cnt * sizeof(__le16);
if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
ctxt_len) {
pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
return;
}
for (i = 0; i < sign_algo_cnt; i++) {
if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
pneg_ctxt->SigningAlgorithms[i]);
conn->signing_negotiated = true;
conn->signing_algorithm =
pneg_ctxt->SigningAlgorithms[i];
break;
}
}
}
static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
struct smb2_negotiate_req *req,
unsigned int len_of_smb)
{
/* +4 is to account for the RFC1001 len field */
struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
int i = 0, len_of_ctxts;
unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
__le32 status = STATUS_INVALID_PARAMETER;
ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
if (len_of_smb <= offset) {
ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
return status;
}
len_of_ctxts = len_of_smb - offset;
while (i++ < neg_ctxt_cnt) {
int clen, ctxt_len;
if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
break;
pctx = (struct smb2_neg_context *)((char *)pctx + offset);
clen = le16_to_cpu(pctx->DataLength);
ctxt_len = clen + sizeof(struct smb2_neg_context);
if (ctxt_len > len_of_ctxts)
break;
if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
if (conn->preauth_info->Preauth_HashId)
break;
status = decode_preauth_ctxt(conn,
(struct smb2_preauth_neg_context *)pctx,
ctxt_len);
if (status != STATUS_SUCCESS)
break;
} else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
if (conn->cipher_type)
break;
decode_encrypt_ctxt(conn,
(struct smb2_encryption_neg_context *)pctx,
ctxt_len);
} else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
if (conn->compress_algorithm)
break;
decode_compress_ctxt(conn,
(struct smb2_compression_capabilities_context *)pctx);
} else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
ksmbd_debug(SMB,
"deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
} else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
ksmbd_debug(SMB,
"deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
conn->posix_ext_supported = true;
} else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
ksmbd_debug(SMB,
"deassemble SMB2_SIGNING_CAPABILITIES context\n");
decode_sign_cap_ctxt(conn,
(struct smb2_signing_capabilities *)pctx,
ctxt_len);
}
/* offsets must be 8 byte aligned */
offset = (ctxt_len + 7) & ~0x7;
len_of_ctxts -= offset;
}
return status;
}
/**
* smb2_handle_negotiate() - handler for smb2 negotiate command
* @work: smb work containing smb request buffer
*
* Return: 0
*/
int smb2_handle_negotiate(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
int rc = 0;
unsigned int smb2_buf_len, smb2_neg_size;
__le32 status;
ksmbd_debug(SMB, "Received negotiate request\n");
conn->need_neg = false;
if (ksmbd_conn_good(conn)) {
pr_err("conn->tcp_status is already in CifsGood State\n");
work->send_no_response = 1;
return rc;
}
smb2_buf_len = get_rfc1002_len(work->request_buf);
smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
if (smb2_neg_size > smb2_buf_len) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (req->DialectCount == 0) {
pr_err("malformed packet\n");
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (conn->dialect == SMB311_PROT_ID) {
unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
if (smb2_buf_len < nego_ctxt_off) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (smb2_neg_size > nego_ctxt_off) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
nego_ctxt_off) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
} else {
if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
smb2_buf_len) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
rc = -EINVAL;
goto err_out;
}
}
conn->cli_cap = le32_to_cpu(req->Capabilities);
switch (conn->dialect) {
case SMB311_PROT_ID:
conn->preauth_info =
kzalloc(sizeof(struct preauth_integrity_info),
GFP_KERNEL);
if (!conn->preauth_info) {
rc = -ENOMEM;
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto err_out;
}
status = deassemble_neg_contexts(conn, req,
get_rfc1002_len(work->request_buf));
if (status != STATUS_SUCCESS) {
pr_err("deassemble_neg_contexts error(0x%x)\n",
status);
rsp->hdr.Status = status;
rc = -EINVAL;
kfree(conn->preauth_info);
conn->preauth_info = NULL;
goto err_out;
}
rc = init_smb3_11_server(conn);
if (rc < 0) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
kfree(conn->preauth_info);
conn->preauth_info = NULL;
goto err_out;
}
ksmbd_gen_preauth_integrity_hash(conn,
work->request_buf,
conn->preauth_info->Preauth_HashValue);
rsp->NegotiateContextOffset =
cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
assemble_neg_contexts(conn, rsp, work->response_buf);
break;
case SMB302_PROT_ID:
init_smb3_02_server(conn);
break;
case SMB30_PROT_ID:
init_smb3_0_server(conn);
break;
case SMB21_PROT_ID:
init_smb2_1_server(conn);
break;
case SMB2X_PROT_ID:
case BAD_PROT_ID:
default:
ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
conn->dialect);
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
rc = -EINVAL;
goto err_out;
}
rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
/* For stats */
conn->connection_type = conn->dialect;
rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
memcpy(conn->ClientGUID, req->ClientGUID,
SMB2_CLIENT_GUID_SIZE);
conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
rsp->StructureSize = cpu_to_le16(65);
rsp->DialectRevision = cpu_to_le16(conn->dialect);
/* Not setting conn guid rsp->ServerGUID, as it
* not used by client for identifying server
*/
memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
rsp->SystemTime = cpu_to_le64(ksmbd_systime());
rsp->ServerStartTime = 0;
ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
le32_to_cpu(rsp->NegotiateContextOffset),
le16_to_cpu(rsp->NegotiateContextCount));
rsp->SecurityBufferOffset = cpu_to_le16(128);
rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
le16_to_cpu(rsp->SecurityBufferOffset));
inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH);
rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
conn->use_spnego = true;
if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
conn->sign = true;
else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
server_conf.enforced_signing = true;
rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
conn->sign = true;
}
conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
ksmbd_conn_set_need_negotiate(conn);
err_out:
if (rc < 0)
smb2_set_err_rsp(work);
return rc;
}
static int alloc_preauth_hash(struct ksmbd_session *sess,
struct ksmbd_conn *conn)
{
if (sess->Preauth_HashValue)
return 0;
sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
if (!sess->Preauth_HashValue)
return -ENOMEM;
return 0;
}
static int generate_preauth_hash(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
u8 *preauth_hash;
if (conn->dialect != SMB311_PROT_ID)
return 0;
if (conn->binding) {
struct preauth_session *preauth_sess;
preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
if (!preauth_sess) {
preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
if (!preauth_sess)
return -ENOMEM;
}
preauth_hash = preauth_sess->Preauth_HashValue;
} else {
if (!sess->Preauth_HashValue)
if (alloc_preauth_hash(sess, conn))
return -ENOMEM;
preauth_hash = sess->Preauth_HashValue;
}
ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
return 0;
}
static int decode_negotiation_token(struct ksmbd_conn *conn,
struct negotiate_message *negblob,
size_t sz)
{
if (!conn->use_spnego)
return -EINVAL;
if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
conn->use_spnego = false;
}
}
return 0;
}
static int ntlm_negotiate(struct ksmbd_work *work,
struct negotiate_message *negblob,
size_t negblob_len)
{
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct challenge_message *chgblob;
unsigned char *spnego_blob = NULL;
u16 spnego_blob_len;
char *neg_blob;
int sz, rc;
ksmbd_debug(SMB, "negotiate phase\n");
rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
if (rc)
return rc;
sz = le16_to_cpu(rsp->SecurityBufferOffset);
chgblob =
(struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
memset(chgblob, 0, sizeof(struct challenge_message));
if (!work->conn->use_spnego) {
sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
if (sz < 0)
return -ENOMEM;
rsp->SecurityBufferLength = cpu_to_le16(sz);
return 0;
}
sz = sizeof(struct challenge_message);
sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
neg_blob = kzalloc(sz, GFP_KERNEL);
if (!neg_blob)
return -ENOMEM;
chgblob = (struct challenge_message *)neg_blob;
sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
if (sz < 0) {
rc = -ENOMEM;
goto out;
}
rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
neg_blob, sz);
if (rc) {
rc = -ENOMEM;
goto out;
}
sz = le16_to_cpu(rsp->SecurityBufferOffset);
memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
out:
kfree(spnego_blob);
kfree(neg_blob);
return rc;
}
static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
struct smb2_sess_setup_req *req)
{
int sz;
if (conn->use_spnego && conn->mechToken)
return (struct authenticate_message *)conn->mechToken;
sz = le16_to_cpu(req->SecurityBufferOffset);
return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
+ sz);
}
static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
struct smb2_sess_setup_req *req)
{
struct authenticate_message *authblob;
struct ksmbd_user *user;
char *name;
unsigned int name_off, name_len, secbuf_len;
secbuf_len = le16_to_cpu(req->SecurityBufferLength);
if (secbuf_len < sizeof(struct authenticate_message)) {
ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
return NULL;
}
authblob = user_authblob(conn, req);
name_off = le32_to_cpu(authblob->UserName.BufferOffset);
name_len = le16_to_cpu(authblob->UserName.Length);
if (secbuf_len < (u64)name_off + name_len)
return NULL;
name = smb_strndup_from_utf16((const char *)authblob + name_off,
name_len,
true,
conn->local_nls);
if (IS_ERR(name)) {
pr_err("cannot allocate memory\n");
return NULL;
}
ksmbd_debug(SMB, "session setup request for user %s\n", name);
user = ksmbd_login_user(name);
kfree(name);
return user;
}
static int ntlm_authenticate(struct ksmbd_work *work)
{
struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct channel *chann = NULL;
struct ksmbd_user *user;
u64 prev_id;
int sz, rc;
ksmbd_debug(SMB, "authenticate phase\n");
if (conn->use_spnego) {
unsigned char *spnego_blob;
u16 spnego_blob_len;
rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
&spnego_blob_len,
0);
if (rc)
return -ENOMEM;
sz = le16_to_cpu(rsp->SecurityBufferOffset);
memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
kfree(spnego_blob);
inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
}
user = session_user(conn, req);
if (!user) {
ksmbd_debug(SMB, "Unknown user name or an error\n");
return -EPERM;
}
/* Check for previous session */
prev_id = le64_to_cpu(req->PreviousSessionId);
if (prev_id && prev_id != sess->id)
destroy_previous_session(conn, user, prev_id);
if (sess->state == SMB2_SESSION_VALID) {
/*
* Reuse session if anonymous try to connect
* on reauthetication.
*/
if (conn->binding == false && ksmbd_anonymous_user(user)) {
ksmbd_free_user(user);
return 0;
}
if (!ksmbd_compare_user(sess->user, user)) {
ksmbd_free_user(user);
return -EPERM;
}
ksmbd_free_user(user);
} else {
sess->user = user;
}
if (conn->binding == false && user_guest(sess->user)) {
rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
} else {
struct authenticate_message *authblob;
authblob = user_authblob(conn, req);
sz = le16_to_cpu(req->SecurityBufferLength);
rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
if (rc) {
set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
ksmbd_debug(SMB, "authentication failed\n");
return -EPERM;
}
}
/*
* If session state is SMB2_SESSION_VALID, We can assume
* that it is reauthentication. And the user/password
* has been verified, so return it here.
*/
if (sess->state == SMB2_SESSION_VALID) {
if (conn->binding)
goto binding_session;
return 0;
}
if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
(conn->sign || server_conf.enforced_signing)) ||
(req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
sess->sign = true;
if (smb3_encryption_negotiated(conn) &&
!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
rc = conn->ops->generate_encryptionkey(conn, sess);
if (rc) {
ksmbd_debug(SMB,
"SMB3 encryption key generation failed\n");
return -EINVAL;
}
sess->enc = true;
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
/*
* signing is disable if encryption is enable
* on this session
*/
sess->sign = false;
}
binding_session:
if (conn->dialect >= SMB30_PROT_ID) {
chann = lookup_chann_list(sess, conn);
if (!chann) {
chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
if (!chann)
return -ENOMEM;
chann->conn = conn;
xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
}
}
if (conn->ops->generate_signingkey) {
rc = conn->ops->generate_signingkey(sess, conn);
if (rc) {
ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
return -EINVAL;
}
}
if (!ksmbd_conn_lookup_dialect(conn)) {
pr_err("fail to verify the dialect\n");
return -ENOENT;
}
return 0;
}
#ifdef CONFIG_SMB_SERVER_KERBEROS5
static int krb5_authenticate(struct ksmbd_work *work)
{
struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
char *in_blob, *out_blob;
struct channel *chann = NULL;
u64 prev_sess_id;
int in_len, out_len;
int retval;
in_blob = (char *)&req->hdr.ProtocolId +
le16_to_cpu(req->SecurityBufferOffset);
in_len = le16_to_cpu(req->SecurityBufferLength);
out_blob = (char *)&rsp->hdr.ProtocolId +
le16_to_cpu(rsp->SecurityBufferOffset);
out_len = work->response_sz -
(le16_to_cpu(rsp->SecurityBufferOffset) + 4);
/* Check previous session */
prev_sess_id = le64_to_cpu(req->PreviousSessionId);
if (prev_sess_id && prev_sess_id != sess->id)
destroy_previous_session(conn, sess->user, prev_sess_id);
if (sess->state == SMB2_SESSION_VALID)
ksmbd_free_user(sess->user);
retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
out_blob, &out_len);
if (retval) {
ksmbd_debug(SMB, "krb5 authentication failed\n");
return -EINVAL;
}
rsp->SecurityBufferLength = cpu_to_le16(out_len);
inc_rfc1001_len(work->response_buf, out_len - 1);
if ((conn->sign || server_conf.enforced_signing) ||
(req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
sess->sign = true;
if (smb3_encryption_negotiated(conn)) {
retval = conn->ops->generate_encryptionkey(conn, sess);
if (retval) {
ksmbd_debug(SMB,
"SMB3 encryption key generation failed\n");
return -EINVAL;
}
sess->enc = true;
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
sess->sign = false;
}
if (conn->dialect >= SMB30_PROT_ID) {
chann = lookup_chann_list(sess, conn);
if (!chann) {
chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
if (!chann)
return -ENOMEM;
chann->conn = conn;
xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
}
}
if (conn->ops->generate_signingkey) {
retval = conn->ops->generate_signingkey(sess, conn);
if (retval) {
ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
return -EINVAL;
}
}
if (!ksmbd_conn_lookup_dialect(conn)) {
pr_err("fail to verify the dialect\n");
return -ENOENT;
}
return 0;
}
#else
static int krb5_authenticate(struct ksmbd_work *work)
{
return -EOPNOTSUPP;
}
#endif
int smb2_sess_setup(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess;
struct negotiate_message *negblob;
unsigned int negblob_len, negblob_off;
int rc = 0;
ksmbd_debug(SMB, "Received request for session setup\n");
rsp->StructureSize = cpu_to_le16(9);
rsp->SessionFlags = 0;
rsp->SecurityBufferOffset = cpu_to_le16(72);
rsp->SecurityBufferLength = 0;
inc_rfc1001_len(work->response_buf, 9);
ksmbd_conn_lock(conn);
if (!req->hdr.SessionId) {
sess = ksmbd_smb2_session_create();
if (!sess) {
rc = -ENOMEM;
goto out_err;
}
rsp->hdr.SessionId = cpu_to_le64(sess->id);
rc = ksmbd_session_register(conn, sess);
if (rc)
goto out_err;
} else if (conn->dialect >= SMB30_PROT_ID &&
(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
u64 sess_id = le64_to_cpu(req->hdr.SessionId);
sess = ksmbd_session_lookup_slowpath(sess_id);
if (!sess) {
rc = -ENOENT;
goto out_err;
}
if (conn->dialect != sess->dialect) {
rc = -EINVAL;
goto out_err;
}
if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
rc = -EINVAL;
goto out_err;
}
if (strncmp(conn->ClientGUID, sess->ClientGUID,
SMB2_CLIENT_GUID_SIZE)) {
rc = -ENOENT;
goto out_err;
}
if (sess->state == SMB2_SESSION_IN_PROGRESS) {
rc = -EACCES;
goto out_err;
}
if (sess->state == SMB2_SESSION_EXPIRED) {
rc = -EFAULT;
goto out_err;
}
if (ksmbd_conn_need_reconnect(conn)) {
rc = -EFAULT;
sess = NULL;
goto out_err;
}
if (ksmbd_session_lookup(conn, sess_id)) {
rc = -EACCES;
goto out_err;
}
if (user_guest(sess->user)) {
rc = -EOPNOTSUPP;
goto out_err;
}
conn->binding = true;
} else if ((conn->dialect < SMB30_PROT_ID ||
server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
sess = NULL;
rc = -EACCES;
goto out_err;
} else {
sess = ksmbd_session_lookup(conn,
le64_to_cpu(req->hdr.SessionId));
if (!sess) {
rc = -ENOENT;
goto out_err;
}
if (sess->state == SMB2_SESSION_EXPIRED) {
rc = -EFAULT;
goto out_err;
}
if (ksmbd_conn_need_reconnect(conn)) {
rc = -EFAULT;
sess = NULL;
goto out_err;
}
}
work->sess = sess;
negblob_off = le16_to_cpu(req->SecurityBufferOffset);
negblob_len = le16_to_cpu(req->SecurityBufferLength);
if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
rc = -EINVAL;
goto out_err;
}
negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
negblob_off);
if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
if (conn->mechToken)
negblob = (struct negotiate_message *)conn->mechToken;
}
if (server_conf.auth_mechs & conn->auth_mechs) {
rc = generate_preauth_hash(work);
if (rc)
goto out_err;
if (conn->preferred_auth_mech &
(KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
rc = krb5_authenticate(work);
if (rc) {
rc = -EINVAL;
goto out_err;
}
if (!ksmbd_conn_need_reconnect(conn)) {
ksmbd_conn_set_good(conn);
sess->state = SMB2_SESSION_VALID;
}
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
if (negblob->MessageType == NtLmNegotiate) {
rc = ntlm_negotiate(work, negblob, negblob_len);
if (rc)
goto out_err;
rsp->hdr.Status =
STATUS_MORE_PROCESSING_REQUIRED;
/*
* Note: here total size -1 is done as an
* adjustment for 0 size blob
*/
inc_rfc1001_len(work->response_buf,
le16_to_cpu(rsp->SecurityBufferLength) - 1);
} else if (negblob->MessageType == NtLmAuthenticate) {
rc = ntlm_authenticate(work);
if (rc)
goto out_err;
if (!ksmbd_conn_need_reconnect(conn)) {
ksmbd_conn_set_good(conn);
sess->state = SMB2_SESSION_VALID;
}
if (conn->binding) {
struct preauth_session *preauth_sess;
preauth_sess =
ksmbd_preauth_session_lookup(conn, sess->id);
if (preauth_sess) {
list_del(&preauth_sess->preauth_entry);
kfree(preauth_sess);
}
}
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
} else {
pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
le32_to_cpu(negblob->MessageType));
rc = -EINVAL;
}
} else {
/* TODO: need one more negotiation */
pr_err("Not support the preferred authentication\n");
rc = -EINVAL;
}
} else {
pr_err("Not support authentication\n");
rc = -EINVAL;
}
out_err:
if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
else if (rc == -EACCES)
rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
else if (rc == -EFAULT)
rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
else if (rc == -ENOMEM)
rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
else if (rc == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
else if (rc)
rsp->hdr.Status = STATUS_LOGON_FAILURE;
if (conn->use_spnego && conn->mechToken) {
kfree(conn->mechToken);
conn->mechToken = NULL;
}
if (rc < 0) {
/*
* SecurityBufferOffset should be set to zero
* in session setup error response.
*/
rsp->SecurityBufferOffset = 0;
if (sess) {
bool try_delay = false;
/*
* To avoid dictionary attacks (repeated session setups rapidly sent) to
* connect to server, ksmbd make a delay of a 5 seconds on session setup
* failure to make it harder to send enough random connection requests
* to break into a server.
*/
if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
try_delay = true;
sess->last_active = jiffies;
sess->state = SMB2_SESSION_EXPIRED;
if (try_delay) {
ksmbd_conn_set_need_reconnect(conn);
ssleep(5);
ksmbd_conn_set_need_negotiate(conn);
}
}
}
ksmbd_conn_unlock(conn);
return rc;
}
/**
* smb2_tree_connect() - handler for smb2 tree connect command
* @work: smb work containing smb request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_tree_connect(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess = work->sess;
char *treename = NULL, *name = NULL;
struct ksmbd_tree_conn_status status;
struct ksmbd_share_config *share;
int rc = -EINVAL;
treename = smb_strndup_from_utf16(req->Buffer,
le16_to_cpu(req->PathLength), true,
conn->local_nls);
if (IS_ERR(treename)) {
pr_err("treename is NULL\n");
status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
goto out_err1;
}
name = ksmbd_extract_sharename(conn->um, treename);
if (IS_ERR(name)) {
status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
goto out_err1;
}
ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
name, treename);
status = ksmbd_tree_conn_connect(conn, sess, name);
if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
else
goto out_err1;
share = status.tree_conn->share_conf;
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC share path request\n");
rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
FILE_DELETE_LE | FILE_READ_CONTROL_LE |
FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
FILE_SYNCHRONIZE_LE;
} else {
rsp->ShareType = SMB2_SHARE_TYPE_DISK;
rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
if (test_tree_conn_flag(status.tree_conn,
KSMBD_TREE_CONN_FLAG_WRITABLE)) {
rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
FILE_SYNCHRONIZE_LE;
}
}
status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
if (conn->posix_ext_supported)
status.tree_conn->posix_extensions = true;
rsp->StructureSize = cpu_to_le16(16);
inc_rfc1001_len(work->response_buf, 16);
out_err1:
rsp->Capabilities = 0;
rsp->Reserved = 0;
/* default manual caching */
rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
if (!IS_ERR(treename))
kfree(treename);
if (!IS_ERR(name))
kfree(name);
switch (status.ret) {
case KSMBD_TREE_CONN_STATUS_OK:
rsp->hdr.Status = STATUS_SUCCESS;
rc = 0;
break;
case -ESTALE:
case -ENOENT:
case KSMBD_TREE_CONN_STATUS_NO_SHARE:
rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
break;
case -ENOMEM:
case KSMBD_TREE_CONN_STATUS_NOMEM:
rsp->hdr.Status = STATUS_NO_MEMORY;
break;
case KSMBD_TREE_CONN_STATUS_ERROR:
case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
rsp->hdr.Status = STATUS_ACCESS_DENIED;
break;
case -EINVAL:
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
break;
default:
rsp->hdr.Status = STATUS_ACCESS_DENIED;
}
if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
smb2_set_err_rsp(work);
return rc;
}
/**
* smb2_create_open_flags() - convert smb open flags to unix open flags
* @file_present: is file already present
* @access: file access flags
* @disposition: file disposition flags
* @may_flags: set with MAY_ flags
*
* Return: file open flags
*/
static int smb2_create_open_flags(bool file_present, __le32 access,
__le32 disposition,
int *may_flags)
{
int oflags = O_NONBLOCK | O_LARGEFILE;
if (access & FILE_READ_DESIRED_ACCESS_LE &&
access & FILE_WRITE_DESIRE_ACCESS_LE) {
oflags |= O_RDWR;
*may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
} else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
oflags |= O_WRONLY;
*may_flags = MAY_OPEN | MAY_WRITE;
} else {
oflags |= O_RDONLY;
*may_flags = MAY_OPEN | MAY_READ;
}
if (access == FILE_READ_ATTRIBUTES_LE)
oflags |= O_PATH;
if (file_present) {
switch (disposition & FILE_CREATE_MASK_LE) {
case FILE_OPEN_LE:
case FILE_CREATE_LE:
break;
case FILE_SUPERSEDE_LE:
case FILE_OVERWRITE_LE:
case FILE_OVERWRITE_IF_LE:
oflags |= O_TRUNC;
break;
default:
break;
}
} else {
switch (disposition & FILE_CREATE_MASK_LE) {
case FILE_SUPERSEDE_LE:
case FILE_CREATE_LE:
case FILE_OPEN_IF_LE:
case FILE_OVERWRITE_IF_LE:
oflags |= O_CREAT;
break;
case FILE_OPEN_LE:
case FILE_OVERWRITE_LE:
oflags &= ~O_CREAT;
break;
default:
break;
}
}
return oflags;
}
/**
* smb2_tree_disconnect() - handler for smb tree connect request
* @work: smb work containing request buffer
*
* Return: 0
*/
int smb2_tree_disconnect(struct ksmbd_work *work)
{
struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess = work->sess;
struct ksmbd_tree_connect *tcon = work->tcon;
rsp->StructureSize = cpu_to_le16(4);
inc_rfc1001_len(work->response_buf, 4);
ksmbd_debug(SMB, "request\n");
if (!tcon || test_and_set_bit(TREE_CONN_EXPIRE, &tcon->status)) {
struct smb2_tree_disconnect_req *req =
smb2_get_msg(work->request_buf);
ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
smb2_set_err_rsp(work);
return 0;
}
ksmbd_close_tree_conn_fds(work);
ksmbd_tree_conn_disconnect(sess, tcon);
work->tcon = NULL;
return 0;
}
/**
* smb2_session_logoff() - handler for session log off request
* @work: smb work containing request buffer
*
* Return: 0
*/
int smb2_session_logoff(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_session *sess;
struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
u64 sess_id = le64_to_cpu(req->hdr.SessionId);
rsp->StructureSize = cpu_to_le16(4);
inc_rfc1001_len(work->response_buf, 4);
ksmbd_debug(SMB, "request\n");
ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
ksmbd_close_session_fds(work);
ksmbd_conn_wait_idle(conn, sess_id);
/*
* Re-lookup session to validate if session is deleted
* while waiting request complete
*/
sess = ksmbd_session_lookup_all(conn, sess_id);
if (ksmbd_tree_conn_session_logoff(sess)) {
ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
smb2_set_err_rsp(work);
return 0;
}
ksmbd_destroy_file_table(&sess->file_table);
sess->state = SMB2_SESSION_EXPIRED;
ksmbd_free_user(sess->user);
sess->user = NULL;
ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
return 0;
}
/**
* create_smb2_pipe() - create IPC pipe
* @work: smb work containing request buffer
*
* Return: 0 on success, otherwise error
*/
static noinline int create_smb2_pipe(struct ksmbd_work *work)
{
struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
struct smb2_create_req *req = smb2_get_msg(work->request_buf);
int id;
int err;
char *name;
name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
1, work->conn->local_nls);
if (IS_ERR(name)) {
rsp->hdr.Status = STATUS_NO_MEMORY;
err = PTR_ERR(name);
goto out;
}
id = ksmbd_session_rpc_open(work->sess, name);
if (id < 0) {
pr_err("Unable to open RPC pipe: %d\n", id);
err = id;
goto out;
}
rsp->hdr.Status = STATUS_SUCCESS;
rsp->StructureSize = cpu_to_le16(89);
rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
rsp->Flags = 0;
rsp->CreateAction = cpu_to_le32(FILE_OPENED);
rsp->CreationTime = cpu_to_le64(0);
rsp->LastAccessTime = cpu_to_le64(0);
rsp->ChangeTime = cpu_to_le64(0);
rsp->AllocationSize = cpu_to_le64(0);
rsp->EndofFile = cpu_to_le64(0);
rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
rsp->Reserved2 = 0;
rsp->VolatileFileId = id;
rsp->PersistentFileId = 0;
rsp->CreateContextsOffset = 0;
rsp->CreateContextsLength = 0;
inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
kfree(name);
return 0;
out:
switch (err) {
case -EINVAL:
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
break;
case -ENOSPC:
case -ENOMEM:
rsp->hdr.Status = STATUS_NO_MEMORY;
break;
}
if (!IS_ERR(name))
kfree(name);
smb2_set_err_rsp(work);
return err;
}
/**
* smb2_set_ea() - handler for setting extended attributes using set
* info command
* @eabuf: set info command buffer
* @buf_len: set info command buffer length
* @path: dentry path for get ea
*
* Return: 0 on success, otherwise error
*/
static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
const struct path *path)
{
struct mnt_idmap *idmap = mnt_idmap(path->mnt);
char *attr_name = NULL, *value;
int rc = 0;
unsigned int next = 0;
if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
le16_to_cpu(eabuf->EaValueLength))
return -EINVAL;
attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
if (!attr_name)
return -ENOMEM;
do {
if (!eabuf->EaNameLength)
goto next;
ksmbd_debug(SMB,
"name : <%s>, name_len : %u, value_len : %u, next : %u\n",
eabuf->name, eabuf->EaNameLength,
le16_to_cpu(eabuf->EaValueLength),
le32_to_cpu(eabuf->NextEntryOffset));
if (eabuf->EaNameLength >
(XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
rc = -EINVAL;
break;
}
memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
eabuf->EaNameLength);
attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
if (!eabuf->EaValueLength) {
rc = ksmbd_vfs_casexattr_len(idmap,
path->dentry,
attr_name,
XATTR_USER_PREFIX_LEN +
eabuf->EaNameLength);
/* delete the EA only when it exits */
if (rc > 0) {
rc = ksmbd_vfs_remove_xattr(idmap,
path->dentry,
attr_name);
if (rc < 0) {
ksmbd_debug(SMB,
"remove xattr failed(%d)\n",
rc);
break;
}
}
/* if the EA doesn't exist, just do nothing. */
rc = 0;
} else {
rc = ksmbd_vfs_setxattr(idmap,
path->dentry, attr_name, value,
le16_to_cpu(eabuf->EaValueLength), 0);
if (rc < 0) {
ksmbd_debug(SMB,
"ksmbd_vfs_setxattr is failed(%d)\n",
rc);
break;
}
}
next:
next = le32_to_cpu(eabuf->NextEntryOffset);
if (next == 0 || buf_len < next)
break;
buf_len -= next;
eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
break;
} while (next != 0);
kfree(attr_name);
return rc;
}
static noinline int smb2_set_stream_name_xattr(const struct path *path,
struct ksmbd_file *fp,
char *stream_name, int s_type)
{
struct mnt_idmap *idmap = mnt_idmap(path->mnt);
size_t xattr_stream_size;
char *xattr_stream_name;
int rc;
rc = ksmbd_vfs_xattr_stream_name(stream_name,
&xattr_stream_name,
&xattr_stream_size,
s_type);
if (rc)
return rc;
fp->stream.name = xattr_stream_name;
fp->stream.size = xattr_stream_size;
/* Check if there is stream prefix in xattr space */
rc = ksmbd_vfs_casexattr_len(idmap,
path->dentry,
xattr_stream_name,
xattr_stream_size);
if (rc >= 0)
return 0;
if (fp->cdoption == FILE_OPEN_LE) {
ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
return -EBADF;
}
rc = ksmbd_vfs_setxattr(idmap, path->dentry,
xattr_stream_name, NULL, 0, 0);
if (rc < 0)
pr_err("Failed to store XATTR stream name :%d\n", rc);
return 0;
}
static int smb2_remove_smb_xattrs(const struct path *path)
{
struct mnt_idmap *idmap = mnt_idmap(path->mnt);
char *name, *xattr_list = NULL;
ssize_t xattr_list_len;
int err = 0;
xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (xattr_list_len < 0) {
goto out;
} else if (!xattr_list_len) {
ksmbd_debug(SMB, "empty xattr in the file\n");
goto out;
}
for (name = xattr_list; name - xattr_list < xattr_list_len;
name += strlen(name) + 1) {
ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
STREAM_PREFIX_LEN)) {
err = ksmbd_vfs_remove_xattr(idmap, path->dentry,
name);
if (err)
ksmbd_debug(SMB, "remove xattr failed : %s\n",
name);
}
}
out:
kvfree(xattr_list);
return err;
}
static int smb2_create_truncate(const struct path *path)
{
int rc = vfs_truncate(path, 0);
if (rc) {
pr_err("vfs_truncate failed, rc %d\n", rc);
return rc;
}
rc = smb2_remove_smb_xattrs(path);
if (rc == -EOPNOTSUPP)
rc = 0;
if (rc)
ksmbd_debug(SMB,
"ksmbd_truncate_stream_name_xattr failed, rc %d\n",
rc);
return rc;
}
static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
struct ksmbd_file *fp)
{
struct xattr_dos_attrib da = {0};
int rc;
if (!test_share_config_flag(tcon->share_conf,
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
return;
da.version = 4;
da.attr = le32_to_cpu(fp->f_ci->m_fattr);
da.itime = da.create_time = fp->create_time;
da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
XATTR_DOSINFO_ITIME;
rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt),
path->dentry, &da);
if (rc)
ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
}
static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
const struct path *path, struct ksmbd_file *fp)
{
struct xattr_dos_attrib da;
int rc;
fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
/* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
if (!test_share_config_flag(tcon->share_conf,
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
return;
rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
path->dentry, &da);
if (rc > 0) {
fp->f_ci->m_fattr = cpu_to_le32(da.attr);
fp->create_time = da.create_time;
fp->itime = da.itime;
}
}
static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
int open_flags, umode_t posix_mode, bool is_dir)
{
struct ksmbd_tree_connect *tcon = work->tcon;
struct ksmbd_share_config *share = tcon->share_conf;
umode_t mode;
int rc;
if (!(open_flags & O_CREAT))
return -EBADF;
ksmbd_debug(SMB, "file does not exist, so creating\n");
if (is_dir == true) {
ksmbd_debug(SMB, "creating directory\n");
mode = share_config_directory_mode(share, posix_mode);
rc = ksmbd_vfs_mkdir(work, name, mode);
if (rc)
return rc;
} else {
ksmbd_debug(SMB, "creating regular file\n");
mode = share_config_create_mode(share, posix_mode);
rc = ksmbd_vfs_create(work, name, mode);
if (rc)
return rc;
}
rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
if (rc) {
pr_err("cannot get linux path (%s), err = %d\n",
name, rc);
return rc;
}
return 0;
}
static int smb2_create_sd_buffer(struct ksmbd_work *work,
struct smb2_create_req *req,
const struct path *path)
{
struct create_context *context;
struct create_sd_buf_req *sd_buf;
if (!req->CreateContextsOffset)
return -ENOENT;
/* Parse SD BUFFER create contexts */
context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
if (!context)
return -ENOENT;
else if (IS_ERR(context))
return PTR_ERR(context);
ksmbd_debug(SMB,
"Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
sd_buf = (struct create_sd_buf_req *)context;
if (le16_to_cpu(context->DataOffset) +
le32_to_cpu(context->DataLength) <
sizeof(struct create_sd_buf_req))
return -EINVAL;
return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
le32_to_cpu(sd_buf->ccontext.DataLength), true);
}
static void ksmbd_acls_fattr(struct smb_fattr *fattr,
struct mnt_idmap *idmap,
struct inode *inode)
{
vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
fattr->cf_uid = vfsuid_into_kuid(vfsuid);
fattr->cf_gid = vfsgid_into_kgid(vfsgid);
fattr->cf_mode = inode->i_mode;
fattr->cf_acls = NULL;
fattr->cf_dacls = NULL;
if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
if (S_ISDIR(inode->i_mode))
fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
}
}
/**
* smb2_open() - handler for smb file open request
* @work: smb work containing request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_open(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct ksmbd_tree_connect *tcon = work->tcon;
struct smb2_create_req *req;
struct smb2_create_rsp *rsp;
struct path path;
struct ksmbd_share_config *share = tcon->share_conf;
struct ksmbd_file *fp = NULL;
struct file *filp = NULL;
struct mnt_idmap *idmap = NULL;
struct kstat stat;
struct create_context *context;
struct lease_ctx_info *lc = NULL;
struct create_ea_buf_req *ea_buf = NULL;
struct oplock_info *opinfo;
__le32 *next_ptr = NULL;
int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
int rc = 0;
int contxt_cnt = 0, query_disk_id = 0;
int maximal_access_ctxt = 0, posix_ctxt = 0;
int s_type = 0;
int next_off = 0;
char *name = NULL;
char *stream_name = NULL;
bool file_present = false, created = false, already_permitted = false;
int share_ret, need_truncate = 0;
u64 time;
umode_t posix_mode = 0;
__le32 daccess, maximal_access = 0;
WORK_BUFFERS(work, req, rsp);
if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
(req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
ksmbd_debug(SMB, "invalid flag in chained command\n");
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
return -EINVAL;
}
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe create request\n");
return create_smb2_pipe(work);
}
if (req->NameLength) {
if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
*(char *)req->Buffer == '\\') {
pr_err("not allow directory name included leading slash\n");
rc = -EINVAL;
goto err_out1;
}
name = smb2_get_name(req->Buffer,
le16_to_cpu(req->NameLength),
work->conn->local_nls);
if (IS_ERR(name)) {
rc = PTR_ERR(name);
if (rc != -ENOMEM)
rc = -ENOENT;
name = NULL;
goto err_out1;
}
ksmbd_debug(SMB, "converted name = %s\n", name);
if (strchr(name, ':')) {
if (!test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_STREAMS)) {
rc = -EBADF;
goto err_out1;
}
rc = parse_stream_name(name, &stream_name, &s_type);
if (rc < 0)
goto err_out1;
}
rc = ksmbd_validate_filename(name);
if (rc < 0)
goto err_out1;
if (ksmbd_share_veto_filename(share, name)) {
rc = -ENOENT;
ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
name);
goto err_out1;
}
} else {
name = kstrdup("", GFP_KERNEL);
if (!name) {
rc = -ENOMEM;
goto err_out1;
}
}
req_op_level = req->RequestedOplockLevel;
if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
lc = parse_lease_state(req);
if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
pr_err("Invalid impersonationlevel : 0x%x\n",
le32_to_cpu(req->ImpersonationLevel));
rc = -EIO;
rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
goto err_out1;
}
if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
pr_err("Invalid create options : 0x%x\n",
le32_to_cpu(req->CreateOptions));
rc = -EINVAL;
goto err_out1;
} else {
if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
req->CreateOptions & FILE_RANDOM_ACCESS_LE)
req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
if (req->CreateOptions &
(FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
FILE_RESERVE_OPFILTER_LE)) {
rc = -EOPNOTSUPP;
goto err_out1;
}
if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
rc = -EINVAL;
goto err_out1;
} else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
}
}
}
if (le32_to_cpu(req->CreateDisposition) >
le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
pr_err("Invalid create disposition : 0x%x\n",
le32_to_cpu(req->CreateDisposition));
rc = -EINVAL;
goto err_out1;
}
if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
pr_err("Invalid desired access : 0x%x\n",
le32_to_cpu(req->DesiredAccess));
rc = -EACCES;
goto err_out1;
}
if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
pr_err("Invalid file attribute : 0x%x\n",
le32_to_cpu(req->FileAttributes));
rc = -EINVAL;
goto err_out1;
}
if (req->CreateContextsOffset) {
/* Parse non-durable handle create contexts */
context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
ea_buf = (struct create_ea_buf_req *)context;
if (le16_to_cpu(context->DataOffset) +
le32_to_cpu(context->DataLength) <
sizeof(struct create_ea_buf_req)) {
rc = -EINVAL;
goto err_out1;
}
if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
rsp->hdr.Status = STATUS_ACCESS_DENIED;
rc = -EACCES;
goto err_out1;
}
}
context = smb2_find_context_vals(req,
SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
ksmbd_debug(SMB,
"get query maximal access context\n");
maximal_access_ctxt = 1;
}
context = smb2_find_context_vals(req,
SMB2_CREATE_TIMEWARP_REQUEST, 4);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
ksmbd_debug(SMB, "get timewarp context\n");
rc = -EBADF;
goto err_out1;
}
if (tcon->posix_extensions) {
context = smb2_find_context_vals(req,
SMB2_CREATE_TAG_POSIX, 16);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out1;
} else if (context) {
struct create_posix *posix =
(struct create_posix *)context;
if (le16_to_cpu(context->DataOffset) +
le32_to_cpu(context->DataLength) <
sizeof(struct create_posix) - 4) {
rc = -EINVAL;
goto err_out1;
}
ksmbd_debug(SMB, "get posix context\n");
posix_mode = le32_to_cpu(posix->Mode);
posix_ctxt = 1;
}
}
}
if (ksmbd_override_fsids(work)) {
rc = -ENOMEM;
goto err_out1;
}
rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
if (!rc) {
if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
/*
* If file exists with under flags, return access
* denied error.
*/
if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
req->CreateDisposition == FILE_OPEN_IF_LE) {
rc = -EACCES;
path_put(&path);
goto err_out;
}
if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
rc = -EACCES;
path_put(&path);
goto err_out;
}
} else if (d_is_symlink(path.dentry)) {
rc = -EACCES;
path_put(&path);
goto err_out;
}
}
if (rc) {
if (rc != -ENOENT)
goto err_out;
ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
name, rc);
rc = 0;
} else {
file_present = true;
idmap = mnt_idmap(path.mnt);
}
if (stream_name) {
if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
if (s_type == DATA_STREAM) {
rc = -EIO;
rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
}
} else {
if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
s_type == DATA_STREAM) {
rc = -EIO;
rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
}
}
if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
rc = -EIO;
}
if (rc < 0)
goto err_out;
}
if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
S_ISDIR(d_inode(path.dentry)->i_mode) &&
!(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
name, req->CreateOptions);
rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
rc = -EIO;
goto err_out;
}
if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
!(req->CreateDisposition == FILE_CREATE_LE) &&
!S_ISDIR(d_inode(path.dentry)->i_mode)) {
rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
rc = -EIO;
goto err_out;
}
if (!stream_name && file_present &&
req->CreateDisposition == FILE_CREATE_LE) {
rc = -EEXIST;
goto err_out;
}
daccess = smb_map_generic_desired_access(req->DesiredAccess);
if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
rc = smb_check_perm_dacl(conn, &path, &daccess,
sess->user->uid);
if (rc)
goto err_out;
}
if (daccess & FILE_MAXIMAL_ACCESS_LE) {
if (!file_present) {
daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
} else {
rc = ksmbd_vfs_query_maximal_access(idmap,
path.dentry,
&daccess);
if (rc)
goto err_out;
already_permitted = true;
}
maximal_access = daccess;
}
open_flags = smb2_create_open_flags(file_present, daccess,
req->CreateDisposition,
&may_flags);
if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
if (open_flags & O_CREAT) {
ksmbd_debug(SMB,
"User does not have write permission\n");
rc = -EACCES;
goto err_out;
}
}
/*create file if not present */
if (!file_present) {
rc = smb2_creat(work, &path, name, open_flags, posix_mode,
req->CreateOptions & FILE_DIRECTORY_FILE_LE);
if (rc) {
if (rc == -ENOENT) {
rc = -EIO;
rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
}
goto err_out;
}
created = true;
idmap = mnt_idmap(path.mnt);
if (ea_buf) {
if (le32_to_cpu(ea_buf->ccontext.DataLength) <
sizeof(struct smb2_ea_info)) {
rc = -EINVAL;
goto err_out;
}
rc = smb2_set_ea(&ea_buf->ea,
le32_to_cpu(ea_buf->ccontext.DataLength),
&path);
if (rc == -EOPNOTSUPP)
rc = 0;
else if (rc)
goto err_out;
}
} else if (!already_permitted) {
/* FILE_READ_ATTRIBUTE is allowed without inode_permission,
* because execute(search) permission on a parent directory,
* is already granted.
*/
if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
rc = inode_permission(idmap,
d_inode(path.dentry),
may_flags);
if (rc)
goto err_out;
if ((daccess & FILE_DELETE_LE) ||
(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
rc = ksmbd_vfs_may_delete(idmap,
path.dentry);
if (rc)
goto err_out;
}
}
}
rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
rc = -EBUSY;
goto err_out;
}
rc = 0;
filp = dentry_open(&path, open_flags, current_cred());
if (IS_ERR(filp)) {
rc = PTR_ERR(filp);
pr_err("dentry open for dir failed, rc %d\n", rc);
goto err_out;
}
if (file_present) {
if (!(open_flags & O_TRUNC))
file_info = FILE_OPENED;
else
file_info = FILE_OVERWRITTEN;
if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
FILE_SUPERSEDE_LE)
file_info = FILE_SUPERSEDED;
} else if (open_flags & O_CREAT) {
file_info = FILE_CREATED;
}
ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
/* Obtain Volatile-ID */
fp = ksmbd_open_fd(work, filp);
if (IS_ERR(fp)) {
fput(filp);
rc = PTR_ERR(fp);
fp = NULL;
goto err_out;
}
/* Get Persistent-ID */
ksmbd_open_durable_fd(fp);
if (!has_file_id(fp->persistent_id)) {
rc = -ENOMEM;
goto err_out;
}
fp->cdoption = req->CreateDisposition;
fp->daccess = daccess;
fp->saccess = req->ShareAccess;
fp->coption = req->CreateOptions;
/* Set default windows and posix acls if creating new file */
if (created) {
int posix_acl_rc;
struct inode *inode = d_inode(path.dentry);
posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
path.dentry,
d_inode(path.dentry->d_parent));
if (posix_acl_rc)
ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR)) {
rc = smb_inherit_dacl(conn, &path, sess->user->uid,
sess->user->gid);
}
if (rc) {
rc = smb2_create_sd_buffer(work, req, &path);
if (rc) {
if (posix_acl_rc)
ksmbd_vfs_set_init_posix_acl(idmap,
path.dentry);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR)) {
struct smb_fattr fattr;
struct smb_ntsd *pntsd;
int pntsd_size, ace_num = 0;
ksmbd_acls_fattr(&fattr, idmap, inode);
if (fattr.cf_acls)
ace_num = fattr.cf_acls->a_count;
if (fattr.cf_dacls)
ace_num += fattr.cf_dacls->a_count;
pntsd = kmalloc(sizeof(struct smb_ntsd) +
sizeof(struct smb_sid) * 3 +
sizeof(struct smb_acl) +
sizeof(struct smb_ace) * ace_num * 2,
GFP_KERNEL);
if (!pntsd) {
posix_acl_release(fattr.cf_acls);
posix_acl_release(fattr.cf_dacls);
goto err_out;
}
rc = build_sec_desc(idmap,
pntsd, NULL, 0,
OWNER_SECINFO |
GROUP_SECINFO |
DACL_SECINFO,
&pntsd_size, &fattr);
posix_acl_release(fattr.cf_acls);
posix_acl_release(fattr.cf_dacls);
if (rc) {
kfree(pntsd);
goto err_out;
}
rc = ksmbd_vfs_set_sd_xattr(conn,
idmap,
path.dentry,
pntsd,
pntsd_size);
kfree(pntsd);
if (rc)
pr_err("failed to store ntacl in xattr : %d\n",
rc);
}
}
}
rc = 0;
}
if (stream_name) {
rc = smb2_set_stream_name_xattr(&path,
fp,
stream_name,
s_type);
if (rc)
goto err_out;
file_info = FILE_CREATED;
}
fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
!fp->attrib_only && !stream_name) {
smb_break_all_oplock(work, fp);
need_truncate = 1;
}
/* fp should be searchable through ksmbd_inode.m_fp_list
* after daccess, saccess, attrib_only, and stream are
* initialized.
*/
write_lock(&fp->f_ci->m_lock);
list_add(&fp->node, &fp->f_ci->m_fp_list);
write_unlock(&fp->f_ci->m_lock);
/* Check delete pending among previous fp before oplock break */
if (ksmbd_inode_pending_delete(fp)) {
rc = -EBUSY;
goto err_out;
}
share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
(req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
!(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
rc = share_ret;
goto err_out;
}
} else {
if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
req_op_level = smb2_map_lease_to_oplock(lc->req_state);
ksmbd_debug(SMB,
"lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
name, req_op_level, lc->req_state);
rc = find_same_lease_key(sess, fp->f_ci, lc);
if (rc)
goto err_out;
} else if (open_flags == O_RDONLY &&
(req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
req_op_level = SMB2_OPLOCK_LEVEL_II;
rc = smb_grant_oplock(work, req_op_level,
fp->persistent_id, fp,
le32_to_cpu(req->hdr.Id.SyncId.TreeId),
lc, share_ret);
if (rc < 0)
goto err_out;
}
if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
ksmbd_fd_set_delete_on_close(fp, file_info);
if (need_truncate) {
rc = smb2_create_truncate(&path);
if (rc)
goto err_out;
}
if (req->CreateContextsOffset) {
struct create_alloc_size_req *az_req;
az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
SMB2_CREATE_ALLOCATION_SIZE, 4);
if (IS_ERR(az_req)) {
rc = PTR_ERR(az_req);
goto err_out;
} else if (az_req) {
loff_t alloc_size;
int err;
if (le16_to_cpu(az_req->ccontext.DataOffset) +
le32_to_cpu(az_req->ccontext.DataLength) <
sizeof(struct create_alloc_size_req)) {
rc = -EINVAL;
goto err_out;
}
alloc_size = le64_to_cpu(az_req->AllocationSize);
ksmbd_debug(SMB,
"request smb2 create allocate size : %llu\n",
alloc_size);
smb_break_all_levII_oplock(work, fp, 1);
err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
alloc_size);
if (err < 0)
ksmbd_debug(SMB,
"vfs_fallocate is failed : %d\n",
err);
}
context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
if (IS_ERR(context)) {
rc = PTR_ERR(context);
goto err_out;
} else if (context) {
ksmbd_debug(SMB, "get query on disk id context\n");
query_disk_id = 1;
}
}
rc = ksmbd_vfs_getattr(&path, &stat);
if (rc)
goto err_out;
if (stat.result_mask & STATX_BTIME)
fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
else
fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
if (req->FileAttributes || fp->f_ci->m_fattr == 0)
fp->f_ci->m_fattr =
cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
if (!created)
smb2_update_xattrs(tcon, &path, fp);
else
smb2_new_xattrs(tcon, &path, fp);
memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
rsp->StructureSize = cpu_to_le16(89);
rcu_read_lock();
opinfo = rcu_dereference(fp->f_opinfo);
rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
rcu_read_unlock();
rsp->Flags = 0;
rsp->CreateAction = cpu_to_le32(file_info);
rsp->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
rsp->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
rsp->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
rsp->ChangeTime = cpu_to_le64(time);
rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
cpu_to_le64(stat.blocks << 9);
rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
rsp->FileAttributes = fp->f_ci->m_fattr;
rsp->Reserved2 = 0;
rsp->PersistentFileId = fp->persistent_id;
rsp->VolatileFileId = fp->volatile_id;
rsp->CreateContextsOffset = 0;
rsp->CreateContextsLength = 0;
inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
/* If lease is request send lease context response */
if (opinfo && opinfo->is_lease) {
struct create_context *lease_ccontext;
ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
name, opinfo->o_lease->state);
rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
lease_ccontext = (struct create_context *)rsp->Buffer;
contxt_cnt++;
create_lease_buf(rsp->Buffer, opinfo->o_lease);
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_lease_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_lease_size);
next_ptr = &lease_ccontext->Next;
next_off = conn->vals->create_lease_size;
}
if (maximal_access_ctxt) {
struct create_context *mxac_ccontext;
if (maximal_access == 0)
ksmbd_vfs_query_maximal_access(idmap,
path.dentry,
&maximal_access);
mxac_ccontext = (struct create_context *)(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength));
contxt_cnt++;
create_mxac_rsp_buf(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength),
le32_to_cpu(maximal_access));
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_mxac_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_mxac_size);
if (next_ptr)
*next_ptr = cpu_to_le32(next_off);
next_ptr = &mxac_ccontext->Next;
next_off = conn->vals->create_mxac_size;
}
if (query_disk_id) {
struct create_context *disk_id_ccontext;
disk_id_ccontext = (struct create_context *)(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength));
contxt_cnt++;
create_disk_id_rsp_buf(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength),
stat.ino, tcon->id);
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_disk_id_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_disk_id_size);
if (next_ptr)
*next_ptr = cpu_to_le32(next_off);
next_ptr = &disk_id_ccontext->Next;
next_off = conn->vals->create_disk_id_size;
}
if (posix_ctxt) {
contxt_cnt++;
create_posix_rsp_buf(rsp->Buffer +
le32_to_cpu(rsp->CreateContextsLength),
fp);
le32_add_cpu(&rsp->CreateContextsLength,
conn->vals->create_posix_size);
inc_rfc1001_len(work->response_buf,
conn->vals->create_posix_size);
if (next_ptr)
*next_ptr = cpu_to_le32(next_off);
}
if (contxt_cnt > 0) {
rsp->CreateContextsOffset =
cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
}
err_out:
if (file_present || created)
path_put(&path);
ksmbd_revert_fsids(work);
err_out1:
if (rc) {
if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
else if (rc == -EPERM)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (rc == -EBUSY)
rsp->hdr.Status = STATUS_DELETE_PENDING;
else if (rc == -EBADF)
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
else if (rc == -ENOEXEC)
rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
else if (rc == -ENXIO)
rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
else if (rc == -EEXIST)
rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
else if (rc == -EMFILE)
rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
if (!rsp->hdr.Status)
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
if (fp)
ksmbd_fd_put(work, fp);
smb2_set_err_rsp(work);
ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
}
kfree(name);
kfree(lc);
return 0;
}
static int readdir_info_level_struct_sz(int info_level)
{
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
return sizeof(struct file_full_directory_info);
case FILE_BOTH_DIRECTORY_INFORMATION:
return sizeof(struct file_both_directory_info);
case FILE_DIRECTORY_INFORMATION:
return sizeof(struct file_directory_info);
case FILE_NAMES_INFORMATION:
return sizeof(struct file_names_info);
case FILEID_FULL_DIRECTORY_INFORMATION:
return sizeof(struct file_id_full_dir_info);
case FILEID_BOTH_DIRECTORY_INFORMATION:
return sizeof(struct file_id_both_directory_info);
case SMB_FIND_FILE_POSIX_INFO:
return sizeof(struct smb2_posix_info);
default:
return -EOPNOTSUPP;
}
}
static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
{
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
{
struct file_full_directory_info *ffdinfo;
ffdinfo = (struct file_full_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
d_info->name = ffdinfo->FileName;
d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
return 0;
}
case FILE_BOTH_DIRECTORY_INFORMATION:
{
struct file_both_directory_info *fbdinfo;
fbdinfo = (struct file_both_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
d_info->name = fbdinfo->FileName;
d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
return 0;
}
case FILE_DIRECTORY_INFORMATION:
{
struct file_directory_info *fdinfo;
fdinfo = (struct file_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
d_info->name = fdinfo->FileName;
d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
return 0;
}
case FILE_NAMES_INFORMATION:
{
struct file_names_info *fninfo;
fninfo = (struct file_names_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
d_info->name = fninfo->FileName;
d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
return 0;
}
case FILEID_FULL_DIRECTORY_INFORMATION:
{
struct file_id_full_dir_info *dinfo;
dinfo = (struct file_id_full_dir_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
d_info->name = dinfo->FileName;
d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
return 0;
}
case FILEID_BOTH_DIRECTORY_INFORMATION:
{
struct file_id_both_directory_info *fibdinfo;
fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
d_info->name = fibdinfo->FileName;
d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
return 0;
}
case SMB_FIND_FILE_POSIX_INFO:
{
struct smb2_posix_info *posix_info;
posix_info = (struct smb2_posix_info *)d_info->rptr;
d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
d_info->name = posix_info->name;
d_info->name_len = le32_to_cpu(posix_info->name_len);
return 0;
}
default:
return -EINVAL;
}
}
/**
* smb2_populate_readdir_entry() - encode directory entry in smb2 response
* buffer
* @conn: connection instance
* @info_level: smb information level
* @d_info: structure included variables for query dir
* @ksmbd_kstat: ksmbd wrapper of dirent stat information
*
* if directory has many entries, find first can't read it fully.
* find next might be called multiple times to read remaining dir entries
*
* Return: 0 on success, otherwise error
*/
static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
struct ksmbd_dir_info *d_info,
struct ksmbd_kstat *ksmbd_kstat)
{
int next_entry_offset = 0;
char *conv_name;
int conv_len;
void *kstat;
int struct_sz, rc = 0;
conv_name = ksmbd_convert_dir_info_name(d_info,
conn->local_nls,
&conv_len);
if (!conv_name)
return -ENOMEM;
/* Somehow the name has only terminating NULL bytes */
if (conv_len < 0) {
rc = -EINVAL;
goto free_conv_name;
}
struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
d_info->last_entry_off_align = next_entry_offset - struct_sz;
if (next_entry_offset > d_info->out_buf_len) {
d_info->out_buf_len = 0;
rc = -ENOSPC;
goto free_conv_name;
}
kstat = d_info->wptr;
if (info_level != FILE_NAMES_INFORMATION)
kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
{
struct file_full_directory_info *ffdinfo;
ffdinfo = (struct file_full_directory_info *)kstat;
ffdinfo->FileNameLength = cpu_to_le32(conv_len);
ffdinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (ffdinfo->EaSize)
ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
if (d_info->hide_dot_file && d_info->name[0] == '.')
ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(ffdinfo->FileName, conv_name, conv_len);
ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_BOTH_DIRECTORY_INFORMATION:
{
struct file_both_directory_info *fbdinfo;
fbdinfo = (struct file_both_directory_info *)kstat;
fbdinfo->FileNameLength = cpu_to_le32(conv_len);
fbdinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (fbdinfo->EaSize)
fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
fbdinfo->ShortNameLength = 0;
fbdinfo->Reserved = 0;
if (d_info->hide_dot_file && d_info->name[0] == '.')
fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(fbdinfo->FileName, conv_name, conv_len);
fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_DIRECTORY_INFORMATION:
{
struct file_directory_info *fdinfo;
fdinfo = (struct file_directory_info *)kstat;
fdinfo->FileNameLength = cpu_to_le32(conv_len);
if (d_info->hide_dot_file && d_info->name[0] == '.')
fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(fdinfo->FileName, conv_name, conv_len);
fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_NAMES_INFORMATION:
{
struct file_names_info *fninfo;
fninfo = (struct file_names_info *)kstat;
fninfo->FileNameLength = cpu_to_le32(conv_len);
memcpy(fninfo->FileName, conv_name, conv_len);
fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_FULL_DIRECTORY_INFORMATION:
{
struct file_id_full_dir_info *dinfo;
dinfo = (struct file_id_full_dir_info *)kstat;
dinfo->FileNameLength = cpu_to_le32(conv_len);
dinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (dinfo->EaSize)
dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
dinfo->Reserved = 0;
dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
if (d_info->hide_dot_file && d_info->name[0] == '.')
dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(dinfo->FileName, conv_name, conv_len);
dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_BOTH_DIRECTORY_INFORMATION:
{
struct file_id_both_directory_info *fibdinfo;
fibdinfo = (struct file_id_both_directory_info *)kstat;
fibdinfo->FileNameLength = cpu_to_le32(conv_len);
fibdinfo->EaSize =
smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
if (fibdinfo->EaSize)
fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
fibdinfo->ShortNameLength = 0;
fibdinfo->Reserved = 0;
fibdinfo->Reserved2 = cpu_to_le16(0);
if (d_info->hide_dot_file && d_info->name[0] == '.')
fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
memcpy(fibdinfo->FileName, conv_name, conv_len);
fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case SMB_FIND_FILE_POSIX_INFO:
{
struct smb2_posix_info *posix_info;
u64 time;
posix_info = (struct smb2_posix_info *)kstat;
posix_info->Ignored = 0;
posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
posix_info->ChangeTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
posix_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
posix_info->LastWriteTime = cpu_to_le64(time);
posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
posix_info->DosAttributes =
S_ISDIR(ksmbd_kstat->kstat->mode) ?
FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
if (d_info->hide_dot_file && d_info->name[0] == '.')
posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
/*
* SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
* UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
* sub_auth(4 * 1(num_subauth)) + RID(4).
*/
id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
memcpy(posix_info->name, conv_name, conv_len);
posix_info->name_len = cpu_to_le32(conv_len);
posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
} /* switch (info_level) */
d_info->last_entry_offset = d_info->data_count;
d_info->data_count += next_entry_offset;
d_info->out_buf_len -= next_entry_offset;
d_info->wptr += next_entry_offset;
ksmbd_debug(SMB,
"info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
info_level, d_info->out_buf_len,
next_entry_offset, d_info->data_count);
free_conv_name:
kfree(conv_name);
return rc;
}
struct smb2_query_dir_private {
struct ksmbd_work *work;
char *search_pattern;
struct ksmbd_file *dir_fp;
struct ksmbd_dir_info *d_info;
int info_level;
};
static void lock_dir(struct ksmbd_file *dir_fp)
{
struct dentry *dir = dir_fp->filp->f_path.dentry;
inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
}
static void unlock_dir(struct ksmbd_file *dir_fp)
{
struct dentry *dir = dir_fp->filp->f_path.dentry;
inode_unlock(d_inode(dir));
}
static int process_query_dir_entries(struct smb2_query_dir_private *priv)
{
struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
struct kstat kstat;
struct ksmbd_kstat ksmbd_kstat;
int rc;
int i;
for (i = 0; i < priv->d_info->num_entry; i++) {
struct dentry *dent;
if (dentry_name(priv->d_info, priv->info_level))
return -EINVAL;
lock_dir(priv->dir_fp);
dent = lookup_one(idmap, priv->d_info->name,
priv->dir_fp->filp->f_path.dentry,
priv->d_info->name_len);
unlock_dir(priv->dir_fp);
if (IS_ERR(dent)) {
ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
priv->d_info->name,
PTR_ERR(dent));
continue;
}
if (unlikely(d_is_negative(dent))) {
dput(dent);
ksmbd_debug(SMB, "Negative dentry `%s'\n",
priv->d_info->name);
continue;
}
ksmbd_kstat.kstat = &kstat;
if (priv->info_level != FILE_NAMES_INFORMATION)
ksmbd_vfs_fill_dentry_attrs(priv->work,
idmap,
dent,
&ksmbd_kstat);
rc = smb2_populate_readdir_entry(priv->work->conn,
priv->info_level,
priv->d_info,
&ksmbd_kstat);
dput(dent);
if (rc)
return rc;
}
return 0;
}
static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
int info_level)
{
int struct_sz;
int conv_len;
int next_entry_offset;
struct_sz = readdir_info_level_struct_sz(info_level);
if (struct_sz == -EOPNOTSUPP)
return -EOPNOTSUPP;
conv_len = (d_info->name_len + 1) * 2;
next_entry_offset = ALIGN(struct_sz + conv_len,
KSMBD_DIR_INFO_ALIGNMENT);
if (next_entry_offset > d_info->out_buf_len) {
d_info->out_buf_len = 0;
return -ENOSPC;
}
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
{
struct file_full_directory_info *ffdinfo;
ffdinfo = (struct file_full_directory_info *)d_info->wptr;
memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
ffdinfo->FileName[d_info->name_len] = 0x00;
ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_BOTH_DIRECTORY_INFORMATION:
{
struct file_both_directory_info *fbdinfo;
fbdinfo = (struct file_both_directory_info *)d_info->wptr;
memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
fbdinfo->FileName[d_info->name_len] = 0x00;
fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_DIRECTORY_INFORMATION:
{
struct file_directory_info *fdinfo;
fdinfo = (struct file_directory_info *)d_info->wptr;
memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
fdinfo->FileName[d_info->name_len] = 0x00;
fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILE_NAMES_INFORMATION:
{
struct file_names_info *fninfo;
fninfo = (struct file_names_info *)d_info->wptr;
memcpy(fninfo->FileName, d_info->name, d_info->name_len);
fninfo->FileName[d_info->name_len] = 0x00;
fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_FULL_DIRECTORY_INFORMATION:
{
struct file_id_full_dir_info *dinfo;
dinfo = (struct file_id_full_dir_info *)d_info->wptr;
memcpy(dinfo->FileName, d_info->name, d_info->name_len);
dinfo->FileName[d_info->name_len] = 0x00;
dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case FILEID_BOTH_DIRECTORY_INFORMATION:
{
struct file_id_both_directory_info *fibdinfo;
fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
fibdinfo->FileName[d_info->name_len] = 0x00;
fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
break;
}
case SMB_FIND_FILE_POSIX_INFO:
{
struct smb2_posix_info *posix_info;
posix_info = (struct smb2_posix_info *)d_info->wptr;
memcpy(posix_info->name, d_info->name, d_info->name_len);
posix_info->name[d_info->name_len] = 0x00;
posix_info->name_len = cpu_to_le32(d_info->name_len);
posix_info->NextEntryOffset =
cpu_to_le32(next_entry_offset);
break;
}
} /* switch (info_level) */
d_info->num_entry++;
d_info->out_buf_len -= next_entry_offset;
d_info->wptr += next_entry_offset;
return 0;
}
static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
loff_t offset, u64 ino, unsigned int d_type)
{
struct ksmbd_readdir_data *buf;
struct smb2_query_dir_private *priv;
struct ksmbd_dir_info *d_info;
int rc;
buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
priv = buf->private;
d_info = priv->d_info;
/* dot and dotdot entries are already reserved */
if (!strcmp(".", name) || !strcmp("..", name))
return true;
if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
return true;
if (!match_pattern(name, namlen, priv->search_pattern))
return true;
d_info->name = name;
d_info->name_len = namlen;
rc = reserve_populate_dentry(d_info, priv->info_level);
if (rc)
return false;
if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
d_info->out_buf_len = 0;
return true;
}
static int verify_info_level(int info_level)
{
switch (info_level) {
case FILE_FULL_DIRECTORY_INFORMATION:
case FILE_BOTH_DIRECTORY_INFORMATION:
case FILE_DIRECTORY_INFORMATION:
case FILE_NAMES_INFORMATION:
case FILEID_FULL_DIRECTORY_INFORMATION:
case FILEID_BOTH_DIRECTORY_INFORMATION:
case SMB_FIND_FILE_POSIX_INFO:
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
{
int free_len;
free_len = (int)(work->response_sz -
(get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
return free_len;
}
static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
unsigned short hdr2_len,
unsigned int out_buf_len)
{
int free_len;
if (out_buf_len > work->conn->vals->max_trans_size)
return -EINVAL;
free_len = smb2_resp_buf_len(work, hdr2_len);
if (free_len < 0)
return -EINVAL;
return min_t(int, out_buf_len, free_len);
}
int smb2_query_dir(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_query_directory_req *req;
struct smb2_query_directory_rsp *rsp;
struct ksmbd_share_config *share = work->tcon->share_conf;
struct ksmbd_file *dir_fp = NULL;
struct ksmbd_dir_info d_info;
int rc = 0;
char *srch_ptr = NULL;
unsigned char srch_flag;
int buffer_sz;
struct smb2_query_dir_private query_dir_private = {NULL, };
WORK_BUFFERS(work, req, rsp);
if (ksmbd_override_fsids(work)) {
rsp->hdr.Status = STATUS_NO_MEMORY;
smb2_set_err_rsp(work);
return -ENOMEM;
}
rc = verify_info_level(req->FileInformationClass);
if (rc) {
rc = -EFAULT;
goto err_out2;
}
dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!dir_fp) {
rc = -EBADF;
goto err_out2;
}
if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
inode_permission(file_mnt_idmap(dir_fp->filp),
file_inode(dir_fp->filp),
MAY_READ | MAY_EXEC)) {
pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
rc = -EACCES;
goto err_out2;
}
if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
pr_err("can't do query dir for a file\n");
rc = -EINVAL;
goto err_out2;
}
srch_flag = req->Flags;
srch_ptr = smb_strndup_from_utf16(req->Buffer,
le16_to_cpu(req->FileNameLength), 1,
conn->local_nls);
if (IS_ERR(srch_ptr)) {
ksmbd_debug(SMB, "Search Pattern not found\n");
rc = -EINVAL;
goto err_out2;
} else {
ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
}
if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
ksmbd_debug(SMB, "Restart directory scan\n");
generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
}
memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
d_info.wptr = (char *)rsp->Buffer;
d_info.rptr = (char *)rsp->Buffer;
d_info.out_buf_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (d_info.out_buf_len < 0) {
rc = -EINVAL;
goto err_out;
}
d_info.flags = srch_flag;
/*
* reserve dot and dotdot entries in head of buffer
* in first response
*/
rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
dir_fp, &d_info, srch_ptr,
smb2_populate_readdir_entry);
if (rc == -ENOSPC)
rc = 0;
else if (rc)
goto err_out;
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
d_info.hide_dot_file = true;
buffer_sz = d_info.out_buf_len;
d_info.rptr = d_info.wptr;
query_dir_private.work = work;
query_dir_private.search_pattern = srch_ptr;
query_dir_private.dir_fp = dir_fp;
query_dir_private.d_info = &d_info;
query_dir_private.info_level = req->FileInformationClass;
dir_fp->readdir_data.private = &query_dir_private;
set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
/*
* req->OutputBufferLength is too small to contain even one entry.
* In this case, it immediately returns OutputBufferLength 0 to client.
*/
if (!d_info.out_buf_len && !d_info.num_entry)
goto no_buf_len;
if (rc > 0 || rc == -ENOSPC)
rc = 0;
else if (rc)
goto err_out;
d_info.wptr = d_info.rptr;
d_info.out_buf_len = buffer_sz;
rc = process_query_dir_entries(&query_dir_private);
if (rc)
goto err_out;
if (!d_info.data_count && d_info.out_buf_len >= 0) {
if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
rsp->hdr.Status = STATUS_NO_SUCH_FILE;
} else {
dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
rsp->hdr.Status = STATUS_NO_MORE_FILES;
}
rsp->StructureSize = cpu_to_le16(9);
rsp->OutputBufferOffset = cpu_to_le16(0);
rsp->OutputBufferLength = cpu_to_le32(0);
rsp->Buffer[0] = 0;
inc_rfc1001_len(work->response_buf, 9);
} else {
no_buf_len:
((struct file_directory_info *)
((char *)rsp->Buffer + d_info.last_entry_offset))
->NextEntryOffset = 0;
if (d_info.data_count >= d_info.last_entry_off_align)
d_info.data_count -= d_info.last_entry_off_align;
rsp->StructureSize = cpu_to_le16(9);
rsp->OutputBufferOffset = cpu_to_le16(72);
rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
}
kfree(srch_ptr);
ksmbd_fd_put(work, dir_fp);
ksmbd_revert_fsids(work);
return 0;
err_out:
pr_err("error while processing smb2 query dir rc = %d\n", rc);
kfree(srch_ptr);
err_out2:
if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_NO_SUCH_FILE;
else if (rc == -EBADF)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (rc == -ENOMEM)
rsp->hdr.Status = STATUS_NO_MEMORY;
else if (rc == -EFAULT)
rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
else if (rc == -EIO)
rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
if (!rsp->hdr.Status)
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, dir_fp);
ksmbd_revert_fsids(work);
return 0;
}
/**
* buffer_check_err() - helper function to check buffer errors
* @reqOutputBufferLength: max buffer length expected in command response
* @rsp: query info response buffer contains output buffer length
* @rsp_org: base response buffer pointer in case of chained response
* @infoclass_size: query info class response buffer size
*
* Return: 0 on success, otherwise error
*/
static int buffer_check_err(int reqOutputBufferLength,
struct smb2_query_info_rsp *rsp,
void *rsp_org, int infoclass_size)
{
if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
if (reqOutputBufferLength < infoclass_size) {
pr_err("Invalid Buffer Size Requested\n");
rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
return -EINVAL;
}
ksmbd_debug(SMB, "Buffer Overflow\n");
rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
reqOutputBufferLength);
rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
}
return 0;
}
static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
void *rsp_org)
{
struct smb2_file_standard_info *sinfo;
sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
sinfo->AllocationSize = cpu_to_le64(4096);
sinfo->EndOfFile = cpu_to_le64(0);
sinfo->NumberOfLinks = cpu_to_le32(1);
sinfo->DeletePending = 1;
sinfo->Directory = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_standard_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
}
static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
void *rsp_org)
{
struct smb2_file_internal_info *file_info;
file_info = (struct smb2_file_internal_info *)rsp->Buffer;
/* any unique number */
file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_internal_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
}
static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp,
void *rsp_org)
{
u64 id;
int rc;
/*
* Windows can sometime send query file info request on
* pipe without opening it, checking error condition here
*/
id = req->VolatileFileId;
if (!ksmbd_session_rpc_method(sess, id))
return -ENOENT;
ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
req->FileInfoClass, req->VolatileFileId);
switch (req->FileInfoClass) {
case FILE_STANDARD_INFORMATION:
get_standard_info_pipe(rsp, rsp_org);
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, rsp_org,
FILE_STANDARD_INFORMATION_SIZE);
break;
case FILE_INTERNAL_INFORMATION:
get_internal_info_pipe(rsp, id, rsp_org);
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, rsp_org,
FILE_INTERNAL_INFORMATION_SIZE);
break;
default:
ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
req->FileInfoClass);
rc = -EOPNOTSUPP;
}
return rc;
}
/**
* smb2_get_ea() - handler for smb2 get extended attribute command
* @work: smb work containing query info command buffer
* @fp: ksmbd_file pointer
* @req: get extended attribute request
* @rsp: response buffer pointer
* @rsp_org: base response buffer pointer in case of chained response
*
* Return: 0 on success, otherwise error
*/
static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp, void *rsp_org)
{
struct smb2_ea_info *eainfo, *prev_eainfo;
char *name, *ptr, *xattr_list = NULL, *buf;
int rc, name_len, value_len, xattr_list_len, idx;
ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
struct smb2_ea_info_req *ea_req = NULL;
const struct path *path;
struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
if (!(fp->daccess & FILE_READ_EA_LE)) {
pr_err("Not permitted to read ext attr : 0x%x\n",
fp->daccess);
return -EACCES;
}
path = &fp->filp->f_path;
/* single EA entry is requested with given user.* name */
if (req->InputBufferLength) {
if (le32_to_cpu(req->InputBufferLength) <
sizeof(struct smb2_ea_info_req))
return -EINVAL;
ea_req = (struct smb2_ea_info_req *)req->Buffer;
} else {
/* need to send all EAs, if no specific EA is requested*/
if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
ksmbd_debug(SMB,
"All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
le32_to_cpu(req->Flags));
}
buf_free_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (buf_free_len < 0)
return -EINVAL;
rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (rc < 0) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
goto out;
} else if (!rc) { /* there is no EA in the file */
ksmbd_debug(SMB, "no ea data in the file\n");
goto done;
}
xattr_list_len = rc;
ptr = (char *)rsp->Buffer;
eainfo = (struct smb2_ea_info *)ptr;
prev_eainfo = eainfo;
idx = 0;
while (idx < xattr_list_len) {
name = xattr_list + idx;
name_len = strlen(name);
ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
idx += name_len + 1;
/*
* CIFS does not support EA other than user.* namespace,
* still keep the framework generic, to list other attrs
* in future.
*/
if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
continue;
if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
STREAM_PREFIX_LEN))
continue;
if (req->InputBufferLength &&
strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
ea_req->EaNameLength))
continue;
if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
continue;
if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
name_len -= XATTR_USER_PREFIX_LEN;
ptr = (char *)(&eainfo->name + name_len + 1);
buf_free_len -= (offsetof(struct smb2_ea_info, name) +
name_len + 1);
/* bailout if xattr can't fit in buf_free_len */
value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
name, &buf);
if (value_len <= 0) {
rc = -ENOENT;
rsp->hdr.Status = STATUS_INVALID_HANDLE;
goto out;
}
buf_free_len -= value_len;
if (buf_free_len < 0) {
kfree(buf);
break;
}
memcpy(ptr, buf, value_len);
kfree(buf);
ptr += value_len;
eainfo->Flags = 0;
eainfo->EaNameLength = name_len;
if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
name_len);
else
memcpy(eainfo->name, name, name_len);
eainfo->name[name_len] = '\0';
eainfo->EaValueLength = cpu_to_le16(value_len);
next_offset = offsetof(struct smb2_ea_info, name) +
name_len + 1 + value_len;
/* align next xattr entry at 4 byte bundary */
alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
if (alignment_bytes) {
memset(ptr, '\0', alignment_bytes);
ptr += alignment_bytes;
next_offset += alignment_bytes;
buf_free_len -= alignment_bytes;
}
eainfo->NextEntryOffset = cpu_to_le32(next_offset);
prev_eainfo = eainfo;
eainfo = (struct smb2_ea_info *)ptr;
rsp_data_cnt += next_offset;
if (req->InputBufferLength) {
ksmbd_debug(SMB, "single entry requested\n");
break;
}
}
/* no more ea entries */
prev_eainfo->NextEntryOffset = 0;
done:
rc = 0;
if (rsp_data_cnt == 0)
rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
inc_rfc1001_len(rsp_org, rsp_data_cnt);
out:
kvfree(xattr_list);
return rc;
}
static void get_file_access_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_access_info *file_info;
file_info = (struct smb2_file_access_info *)rsp->Buffer;
file_info->AccessFlags = fp->daccess;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_access_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
}
static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_basic_info *basic_info;
struct kstat stat;
u64 time;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
pr_err("no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp),
&stat);
basic_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
basic_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
basic_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
basic_info->ChangeTime = cpu_to_le64(time);
basic_info->Attributes = fp->f_ci->m_fattr;
basic_info->Pad1 = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_basic_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
return 0;
}
static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_standard_info *sinfo;
unsigned int delete_pending;
struct inode *inode;
struct kstat stat;
inode = file_inode(fp->filp);
generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat);
sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
delete_pending = ksmbd_inode_pending_delete(fp);
sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
sinfo->DeletePending = delete_pending;
sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_standard_info));
inc_rfc1001_len(rsp_org,
sizeof(struct smb2_file_standard_info));
}
static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
void *rsp_org)
{
struct smb2_file_alignment_info *file_info;
file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
file_info->AlignmentRequirement = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_alignment_info));
inc_rfc1001_len(rsp_org,
sizeof(struct smb2_file_alignment_info));
}
static int get_file_all_info(struct ksmbd_work *work,
struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp,
void *rsp_org)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_file_all_info *file_info;
unsigned int delete_pending;
struct inode *inode;
struct kstat stat;
int conv_len;
char *filename;
u64 time;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
if (IS_ERR(filename))
return PTR_ERR(filename);
inode = file_inode(fp->filp);
generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat);
ksmbd_debug(SMB, "filename = %s\n", filename);
delete_pending = ksmbd_inode_pending_delete(fp);
file_info = (struct smb2_file_all_info *)rsp->Buffer;
file_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
file_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
file_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
file_info->ChangeTime = cpu_to_le64(time);
file_info->Attributes = fp->f_ci->m_fattr;
file_info->Pad1 = 0;
file_info->AllocationSize =
cpu_to_le64(inode->i_blocks << 9);
file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
file_info->NumberOfLinks =
cpu_to_le32(get_nlink(&stat) - delete_pending);
file_info->DeletePending = delete_pending;
file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
file_info->Pad2 = 0;
file_info->IndexNumber = cpu_to_le64(stat.ino);
file_info->EASize = 0;
file_info->AccessFlags = fp->daccess;
file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
file_info->Mode = fp->coption;
file_info->AlignmentRequirement = 0;
conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
PATH_MAX, conn->local_nls, 0);
conv_len *= 2;
file_info->FileNameLength = cpu_to_le32(conv_len);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
kfree(filename);
inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
return 0;
}
static void get_file_alternate_info(struct ksmbd_work *work,
struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp,
void *rsp_org)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_file_alt_name_info *file_info;
struct dentry *dentry = fp->filp->f_path.dentry;
int conv_len;
spin_lock(&dentry->d_lock);
file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
conv_len = ksmbd_extract_shortname(conn,
dentry->d_name.name,
file_info->FileName);
spin_unlock(&dentry->d_lock);
file_info->FileNameLength = cpu_to_le32(conv_len);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
}
static void get_file_stream_info(struct ksmbd_work *work,
struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp,
void *rsp_org)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_file_stream_info *file_info;
char *stream_name, *xattr_list = NULL, *stream_buf;
struct kstat stat;
const struct path *path = &fp->filp->f_path;
ssize_t xattr_list_len;
int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
int buf_free_len;
struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp),
&stat);
file_info = (struct smb2_file_stream_info *)rsp->Buffer;
buf_free_len =
smb2_calc_max_out_buf_len(work, 8,
le32_to_cpu(req->OutputBufferLength));
if (buf_free_len < 0)
goto out;
xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
if (xattr_list_len < 0) {
goto out;
} else if (!xattr_list_len) {
ksmbd_debug(SMB, "empty xattr in the file\n");
goto out;
}
while (idx < xattr_list_len) {
stream_name = xattr_list + idx;
streamlen = strlen(stream_name);
idx += streamlen + 1;
ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
STREAM_PREFIX, STREAM_PREFIX_LEN))
continue;
stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
STREAM_PREFIX_LEN);
streamlen = stream_name_len;
/* plus : size */
streamlen += 1;
stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
if (!stream_buf)
break;
streamlen = snprintf(stream_buf, streamlen + 1,
":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
if (next > buf_free_len) {
kfree(stream_buf);
break;
}
file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
stream_buf, streamlen,
conn->local_nls, 0);
streamlen *= 2;
kfree(stream_buf);
file_info->StreamNameLength = cpu_to_le32(streamlen);
file_info->StreamSize = cpu_to_le64(stream_name_len);
file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
nbytes += next;
buf_free_len -= next;
file_info->NextEntryOffset = cpu_to_le32(next);
}
out:
if (!S_ISDIR(stat.mode) &&
buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
file_info = (struct smb2_file_stream_info *)
&rsp->Buffer[nbytes];
streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
"::$DATA", 7, conn->local_nls, 0);
streamlen *= 2;
file_info->StreamNameLength = cpu_to_le32(streamlen);
file_info->StreamSize = cpu_to_le64(stat.size);
file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
}
/* last entry offset should be 0 */
file_info->NextEntryOffset = 0;
kvfree(xattr_list);
rsp->OutputBufferLength = cpu_to_le32(nbytes);
inc_rfc1001_len(rsp_org, nbytes);
}
static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_internal_info *file_info;
struct kstat stat;
generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp),
&stat);
file_info = (struct smb2_file_internal_info *)rsp->Buffer;
file_info->IndexNumber = cpu_to_le64(stat.ino);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_internal_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
}
static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_ntwrk_info *file_info;
struct inode *inode;
struct kstat stat;
u64 time;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
pr_err("no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
inode = file_inode(fp->filp);
generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat);
file_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(stat.atime);
file_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.mtime);
file_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(stat.ctime);
file_info->ChangeTime = cpu_to_le64(time);
file_info->Attributes = fp->f_ci->m_fattr;
file_info->AllocationSize =
cpu_to_le64(inode->i_blocks << 9);
file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
file_info->Reserved = cpu_to_le32(0);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
return 0;
}
static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
{
struct smb2_file_ea_info *file_info;
file_info = (struct smb2_file_ea_info *)rsp->Buffer;
file_info->EASize = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_ea_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
}
static void get_file_position_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_pos_info *file_info;
file_info = (struct smb2_file_pos_info *)rsp->Buffer;
file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_pos_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
}
static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_mode_info *file_info;
file_info = (struct smb2_file_mode_info *)rsp->Buffer;
file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_mode_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
}
static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_comp_info *file_info;
struct kstat stat;
generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp),
&stat);
file_info = (struct smb2_file_comp_info *)rsp->Buffer;
file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
file_info->CompressionUnitShift = 0;
file_info->ChunkShift = 0;
file_info->ClusterShift = 0;
memset(&file_info->Reserved[0], 0, 3);
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_comp_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
}
static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb2_file_attr_tag_info *file_info;
if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
pr_err("no right to read the attributes : 0x%x\n",
fp->daccess);
return -EACCES;
}
file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
file_info->FileAttributes = fp->f_ci->m_fattr;
file_info->ReparseTag = 0;
rsp->OutputBufferLength =
cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
return 0;
}
static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
struct smb311_posix_qinfo *file_info;
struct inode *inode = file_inode(fp->filp);
struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
u64 time;
int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
file_info->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(inode->i_atime);
file_info->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_mtime);
file_info->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_ctime);
file_info->ChangeTime = cpu_to_le64(time);
file_info->DosAttributes = fp->f_ci->m_fattr;
file_info->Inode = cpu_to_le64(inode->i_ino);
file_info->EndOfFile = cpu_to_le64(inode->i_size);
file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
file_info->HardLinks = cpu_to_le32(inode->i_nlink);
file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
file_info->DeviceId = cpu_to_le32(inode->i_rdev);
/*
* Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
* UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
* sub_auth(4 * 1(num_subauth)) + RID(4).
*/
id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
inc_rfc1001_len(rsp_org, out_buf_len);
return out_buf_len;
}
static int smb2_get_info_file(struct ksmbd_work *work,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp)
{
struct ksmbd_file *fp;
int fileinfoclass = 0;
int rc = 0;
int file_infoclass_size;
unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_PIPE)) {
/* smb2 info file called for pipe */
return smb2_get_info_file_pipe(work->sess, req, rsp,
work->response_buf);
}
if (work->next_smb2_rcv_hdr_off) {
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
pid = work->compound_pfid;
}
}
if (!has_file_id(id)) {
id = req->VolatileFileId;
pid = req->PersistentFileId;
}
fp = ksmbd_lookup_fd_slow(work, id, pid);
if (!fp)
return -ENOENT;
fileinfoclass = req->FileInfoClass;
switch (fileinfoclass) {
case FILE_ACCESS_INFORMATION:
get_file_access_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
break;
case FILE_BASIC_INFORMATION:
rc = get_file_basic_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
break;
case FILE_STANDARD_INFORMATION:
get_file_standard_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
break;
case FILE_ALIGNMENT_INFORMATION:
get_file_alignment_info(rsp, work->response_buf);
file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
break;
case FILE_ALL_INFORMATION:
rc = get_file_all_info(work, rsp, fp, work->response_buf);
file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
break;
case FILE_ALTERNATE_NAME_INFORMATION:
get_file_alternate_info(work, rsp, fp, work->response_buf);
file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
break;
case FILE_STREAM_INFORMATION:
get_file_stream_info(work, rsp, fp, work->response_buf);
file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
break;
case FILE_INTERNAL_INFORMATION:
get_file_internal_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
break;
case FILE_NETWORK_OPEN_INFORMATION:
rc = get_file_network_open_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
break;
case FILE_EA_INFORMATION:
get_file_ea_info(rsp, work->response_buf);
file_infoclass_size = FILE_EA_INFORMATION_SIZE;
break;
case FILE_FULL_EA_INFORMATION:
rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
break;
case FILE_POSITION_INFORMATION:
get_file_position_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
break;
case FILE_MODE_INFORMATION:
get_file_mode_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
break;
case FILE_COMPRESSION_INFORMATION:
get_file_compression_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
break;
case FILE_ATTRIBUTE_TAG_INFORMATION:
rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
break;
case SMB_FIND_FILE_POSIX_INFO:
if (!work->tcon->posix_extensions) {
pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
rc = -EOPNOTSUPP;
} else {
file_infoclass_size = find_file_posix_info(rsp, fp,
work->response_buf);
}
break;
default:
ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
fileinfoclass);
rc = -EOPNOTSUPP;
}
if (!rc)
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, work->response_buf,
file_infoclass_size);
ksmbd_fd_put(work, fp);
return rc;
}
static int smb2_get_info_filesystem(struct ksmbd_work *work,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp)
{
struct ksmbd_session *sess = work->sess;
struct ksmbd_conn *conn = work->conn;
struct ksmbd_share_config *share = work->tcon->share_conf;
int fsinfoclass = 0;
struct kstatfs stfs;
struct path path;
int rc = 0, len;
int fs_infoclass_size = 0;
if (!share->path)
return -EIO;
rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
if (rc) {
pr_err("cannot create vfs path\n");
return -EIO;
}
rc = vfs_statfs(&path, &stfs);
if (rc) {
pr_err("cannot do stat of path %s\n", share->path);
path_put(&path);
return -EIO;
}
fsinfoclass = req->FileInfoClass;
switch (fsinfoclass) {
case FS_DEVICE_INFORMATION:
{
struct filesystem_device_info *info;
info = (struct filesystem_device_info *)rsp->Buffer;
info->DeviceType = cpu_to_le32(stfs.f_type);
info->DeviceCharacteristics = cpu_to_le32(0x00000020);
rsp->OutputBufferLength = cpu_to_le32(8);
inc_rfc1001_len(work->response_buf, 8);
fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
break;
}
case FS_ATTRIBUTE_INFORMATION:
{
struct filesystem_attribute_info *info;
size_t sz;
info = (struct filesystem_attribute_info *)rsp->Buffer;
info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
FILE_PERSISTENT_ACLS |
FILE_UNICODE_ON_DISK |
FILE_CASE_PRESERVED_NAMES |
FILE_CASE_SENSITIVE_SEARCH |
FILE_SUPPORTS_BLOCK_REFCOUNTING);
info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_STREAMS))
info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
len = smbConvertToUTF16((__le16 *)info->FileSystemName,
"NTFS", PATH_MAX, conn->local_nls, 0);
len = len * 2;
info->FileSystemNameLen = cpu_to_le32(len);
sz = sizeof(struct filesystem_attribute_info) - 2 + len;
rsp->OutputBufferLength = cpu_to_le32(sz);
inc_rfc1001_len(work->response_buf, sz);
fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
break;
}
case FS_VOLUME_INFORMATION:
{
struct filesystem_vol_info *info;
size_t sz;
unsigned int serial_crc = 0;
info = (struct filesystem_vol_info *)(rsp->Buffer);
info->VolumeCreationTime = 0;
serial_crc = crc32_le(serial_crc, share->name,
strlen(share->name));
serial_crc = crc32_le(serial_crc, share->path,
strlen(share->path));
serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
strlen(ksmbd_netbios_name()));
/* Taking dummy value of serial number*/
info->SerialNumber = cpu_to_le32(serial_crc);
len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
share->name, PATH_MAX,
conn->local_nls, 0);
len = len * 2;
info->VolumeLabelSize = cpu_to_le32(len);
info->Reserved = 0;
sz = sizeof(struct filesystem_vol_info) - 2 + len;
rsp->OutputBufferLength = cpu_to_le32(sz);
inc_rfc1001_len(work->response_buf, sz);
fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
break;
}
case FS_SIZE_INFORMATION:
{
struct filesystem_info *info;
info = (struct filesystem_info *)(rsp->Buffer);
info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
info->SectorsPerAllocationUnit = cpu_to_le32(1);
info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
rsp->OutputBufferLength = cpu_to_le32(24);
inc_rfc1001_len(work->response_buf, 24);
fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
break;
}
case FS_FULL_SIZE_INFORMATION:
{
struct smb2_fs_full_size_info *info;
info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
info->CallerAvailableAllocationUnits =
cpu_to_le64(stfs.f_bavail);
info->ActualAvailableAllocationUnits =
cpu_to_le64(stfs.f_bfree);
info->SectorsPerAllocationUnit = cpu_to_le32(1);
info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
rsp->OutputBufferLength = cpu_to_le32(32);
inc_rfc1001_len(work->response_buf, 32);
fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
break;
}
case FS_OBJECT_ID_INFORMATION:
{
struct object_id_info *info;
info = (struct object_id_info *)(rsp->Buffer);
if (!user_guest(sess->user))
memcpy(info->objid, user_passkey(sess->user), 16);
else
memset(info->objid, 0, 16);
info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
info->extended_info.version = cpu_to_le32(1);
info->extended_info.release = cpu_to_le32(1);
info->extended_info.rel_date = 0;
memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
rsp->OutputBufferLength = cpu_to_le32(64);
inc_rfc1001_len(work->response_buf, 64);
fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
break;
}
case FS_SECTOR_SIZE_INFORMATION:
{
struct smb3_fs_ss_info *info;
unsigned int sector_size =
min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
info = (struct smb3_fs_ss_info *)(rsp->Buffer);
info->LogicalBytesPerSector = cpu_to_le32(sector_size);
info->PhysicalBytesPerSectorForAtomicity =
cpu_to_le32(sector_size);
info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
info->FSEffPhysicalBytesPerSectorForAtomicity =
cpu_to_le32(sector_size);
info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
info->ByteOffsetForSectorAlignment = 0;
info->ByteOffsetForPartitionAlignment = 0;
rsp->OutputBufferLength = cpu_to_le32(28);
inc_rfc1001_len(work->response_buf, 28);
fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
break;
}
case FS_CONTROL_INFORMATION:
{
/*
* TODO : The current implementation is based on
* test result with win7(NTFS) server. It's need to
* modify this to get valid Quota values
* from Linux kernel
*/
struct smb2_fs_control_info *info;
info = (struct smb2_fs_control_info *)(rsp->Buffer);
info->FreeSpaceStartFiltering = 0;
info->FreeSpaceThreshold = 0;
info->FreeSpaceStopFiltering = 0;
info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
info->Padding = 0;
rsp->OutputBufferLength = cpu_to_le32(48);
inc_rfc1001_len(work->response_buf, 48);
fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
break;
}
case FS_POSIX_INFORMATION:
{
struct filesystem_posix_info *info;
if (!work->tcon->posix_extensions) {
pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
rc = -EOPNOTSUPP;
} else {
info = (struct filesystem_posix_info *)(rsp->Buffer);
info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
info->BlockSize = cpu_to_le32(stfs.f_bsize);
info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
info->TotalFileNodes = cpu_to_le64(stfs.f_files);
info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
rsp->OutputBufferLength = cpu_to_le32(56);
inc_rfc1001_len(work->response_buf, 56);
fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
}
break;
}
default:
path_put(&path);
return -EOPNOTSUPP;
}
rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
rsp, work->response_buf,
fs_infoclass_size);
path_put(&path);
return rc;
}
static int smb2_get_info_sec(struct ksmbd_work *work,
struct smb2_query_info_req *req,
struct smb2_query_info_rsp *rsp)
{
struct ksmbd_file *fp;
struct mnt_idmap *idmap;
struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
struct smb_fattr fattr = {{0}};
struct inode *inode;
__u32 secdesclen = 0;
unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
int addition_info = le32_to_cpu(req->AdditionalInformation);
int rc = 0, ppntsd_size = 0;
if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
PROTECTED_DACL_SECINFO |
UNPROTECTED_DACL_SECINFO)) {
ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
addition_info);
pntsd->revision = cpu_to_le16(1);
pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
pntsd->osidoffset = 0;
pntsd->gsidoffset = 0;
pntsd->sacloffset = 0;
pntsd->dacloffset = 0;
secdesclen = sizeof(struct smb_ntsd);
rsp->OutputBufferLength = cpu_to_le32(secdesclen);
inc_rfc1001_len(work->response_buf, secdesclen);
return 0;
}
if (work->next_smb2_rcv_hdr_off) {
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
pid = work->compound_pfid;
}
}
if (!has_file_id(id)) {
id = req->VolatileFileId;
pid = req->PersistentFileId;
}
fp = ksmbd_lookup_fd_slow(work, id, pid);
if (!fp)
return -ENOENT;
idmap = file_mnt_idmap(fp->filp);
inode = file_inode(fp->filp);
ksmbd_acls_fattr(&fattr, idmap, inode);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_ACL_XATTR))
ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
fp->filp->f_path.dentry,
&ppntsd);
/* Check if sd buffer size exceeds response buffer size */
if (smb2_resp_buf_len(work, 8) > ppntsd_size)
rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
addition_info, &secdesclen, &fattr);
posix_acl_release(fattr.cf_acls);
posix_acl_release(fattr.cf_dacls);
kfree(ppntsd);
ksmbd_fd_put(work, fp);
if (rc)
return rc;
rsp->OutputBufferLength = cpu_to_le32(secdesclen);
inc_rfc1001_len(work->response_buf, secdesclen);
return 0;
}
/**
* smb2_query_info() - handler for smb2 query info command
* @work: smb work containing query info request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_query_info(struct ksmbd_work *work)
{
struct smb2_query_info_req *req;
struct smb2_query_info_rsp *rsp;
int rc = 0;
WORK_BUFFERS(work, req, rsp);
ksmbd_debug(SMB, "GOT query info request\n");
switch (req->InfoType) {
case SMB2_O_INFO_FILE:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
rc = smb2_get_info_file(work, req, rsp);
break;
case SMB2_O_INFO_FILESYSTEM:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
rc = smb2_get_info_filesystem(work, req, rsp);
break;
case SMB2_O_INFO_SECURITY:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
rc = smb2_get_info_sec(work, req, rsp);
break;
default:
ksmbd_debug(SMB, "InfoType %d not supported yet\n",
req->InfoType);
rc = -EOPNOTSUPP;
}
if (rc < 0) {
if (rc == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (rc == -EIO)
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
smb2_set_err_rsp(work);
ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
rc);
return rc;
}
rsp->StructureSize = cpu_to_le16(9);
rsp->OutputBufferOffset = cpu_to_le16(72);
inc_rfc1001_len(work->response_buf, 8);
return 0;
}
/**
* smb2_close_pipe() - handler for closing IPC pipe
* @work: smb work containing close request buffer
*
* Return: 0
*/
static noinline int smb2_close_pipe(struct ksmbd_work *work)
{
u64 id;
struct smb2_close_req *req = smb2_get_msg(work->request_buf);
struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
id = req->VolatileFileId;
ksmbd_session_rpc_close(work->sess, id);
rsp->StructureSize = cpu_to_le16(60);
rsp->Flags = 0;
rsp->Reserved = 0;
rsp->CreationTime = 0;
rsp->LastAccessTime = 0;
rsp->LastWriteTime = 0;
rsp->ChangeTime = 0;
rsp->AllocationSize = 0;
rsp->EndOfFile = 0;
rsp->Attributes = 0;
inc_rfc1001_len(work->response_buf, 60);
return 0;
}
/**
* smb2_close() - handler for smb2 close file command
* @work: smb work containing close request buffer
*
* Return: 0
*/
int smb2_close(struct ksmbd_work *work)
{
u64 volatile_id = KSMBD_NO_FID;
u64 sess_id;
struct smb2_close_req *req;
struct smb2_close_rsp *rsp;
struct ksmbd_conn *conn = work->conn;
struct ksmbd_file *fp;
struct inode *inode;
u64 time;
int err = 0;
WORK_BUFFERS(work, req, rsp);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe close request\n");
return smb2_close_pipe(work);
}
sess_id = le64_to_cpu(req->hdr.SessionId);
if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
sess_id = work->compound_sid;
work->compound_sid = 0;
if (check_session_id(conn, sess_id)) {
work->compound_sid = sess_id;
} else {
rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
err = -EBADF;
goto out;
}
if (work->next_smb2_rcv_hdr_off &&
!has_file_id(req->VolatileFileId)) {
if (!has_file_id(work->compound_fid)) {
/* file already closed, return FILE_CLOSED */
ksmbd_debug(SMB, "file already closed\n");
rsp->hdr.Status = STATUS_FILE_CLOSED;
err = -EBADF;
goto out;
} else {
ksmbd_debug(SMB,
"Compound request set FID = %llu:%llu\n",
work->compound_fid,
work->compound_pfid);
volatile_id = work->compound_fid;
/* file closed, stored id is not valid anymore */
work->compound_fid = KSMBD_NO_FID;
work->compound_pfid = KSMBD_NO_FID;
}
} else {
volatile_id = req->VolatileFileId;
}
ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
rsp->StructureSize = cpu_to_le16(60);
rsp->Reserved = 0;
if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
fp = ksmbd_lookup_fd_fast(work, volatile_id);
if (!fp) {
err = -ENOENT;
goto out;
}
inode = file_inode(fp->filp);
rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
cpu_to_le64(inode->i_blocks << 9);
rsp->EndOfFile = cpu_to_le64(inode->i_size);
rsp->Attributes = fp->f_ci->m_fattr;
rsp->CreationTime = cpu_to_le64(fp->create_time);
time = ksmbd_UnixTimeToNT(inode->i_atime);
rsp->LastAccessTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_mtime);
rsp->LastWriteTime = cpu_to_le64(time);
time = ksmbd_UnixTimeToNT(inode->i_ctime);
rsp->ChangeTime = cpu_to_le64(time);
ksmbd_fd_put(work, fp);
} else {
rsp->Flags = 0;
rsp->AllocationSize = 0;
rsp->EndOfFile = 0;
rsp->Attributes = 0;
rsp->CreationTime = 0;
rsp->LastAccessTime = 0;
rsp->LastWriteTime = 0;
rsp->ChangeTime = 0;
}
err = ksmbd_close_fd(work, volatile_id);
out:
if (err) {
if (rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_FILE_CLOSED;
smb2_set_err_rsp(work);
} else {
inc_rfc1001_len(work->response_buf, 60);
}
return 0;
}
/**
* smb2_echo() - handler for smb2 echo(ping) command
* @work: smb work containing echo request buffer
*
* Return: 0
*/
int smb2_echo(struct ksmbd_work *work)
{
struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
rsp->StructureSize = cpu_to_le16(4);
rsp->Reserved = 0;
inc_rfc1001_len(work->response_buf, 4);
return 0;
}
static int smb2_rename(struct ksmbd_work *work,
struct ksmbd_file *fp,
struct mnt_idmap *idmap,
struct smb2_file_rename_info *file_info,
struct nls_table *local_nls)
{
struct ksmbd_share_config *share = fp->tcon->share_conf;
char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
char *pathname = NULL;
struct path path;
bool file_present = true;
int rc;
ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
pathname = kmalloc(PATH_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
abs_oldname = file_path(fp->filp, pathname, PATH_MAX);
if (IS_ERR(abs_oldname)) {
rc = -EINVAL;
goto out;
}
old_name = strrchr(abs_oldname, '/');
if (old_name && old_name[1] != '\0') {
old_name++;
} else {
ksmbd_debug(SMB, "can't get last component in path %s\n",
abs_oldname);
rc = -ENOENT;
goto out;
}
new_name = smb2_get_name(file_info->FileName,
le32_to_cpu(file_info->FileNameLength),
local_nls);
if (IS_ERR(new_name)) {
rc = PTR_ERR(new_name);
goto out;
}
if (strchr(new_name, ':')) {
int s_type;
char *xattr_stream_name, *stream_name = NULL;
size_t xattr_stream_size;
int len;
rc = parse_stream_name(new_name, &stream_name, &s_type);
if (rc < 0)
goto out;
len = strlen(new_name);
if (len > 0 && new_name[len - 1] != '/') {
pr_err("not allow base filename in rename\n");
rc = -ESHARE;
goto out;
}
rc = ksmbd_vfs_xattr_stream_name(stream_name,
&xattr_stream_name,
&xattr_stream_size,
s_type);
if (rc)
goto out;
rc = ksmbd_vfs_setxattr(idmap,
fp->filp->f_path.dentry,
xattr_stream_name,
NULL, 0, 0);
if (rc < 0) {
pr_err("failed to store stream name in xattr: %d\n",
rc);
rc = -EINVAL;
goto out;
}
goto out;
}
ksmbd_debug(SMB, "new name %s\n", new_name);
rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
if (rc) {
if (rc != -ENOENT)
goto out;
file_present = false;
} else {
path_put(&path);
}
if (ksmbd_share_veto_filename(share, new_name)) {
rc = -ENOENT;
ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
goto out;
}
if (file_info->ReplaceIfExists) {
if (file_present) {
rc = ksmbd_vfs_remove_file(work, new_name);
if (rc) {
if (rc != -ENOTEMPTY)
rc = -EINVAL;
ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
new_name, rc);
goto out;
}
}
} else {
if (file_present &&
strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
rc = -EEXIST;
ksmbd_debug(SMB,
"cannot rename already existing file\n");
goto out;
}
}
rc = ksmbd_vfs_fp_rename(work, fp, new_name);
out:
kfree(pathname);
if (!IS_ERR(new_name))
kfree(new_name);
return rc;
}
static int smb2_create_link(struct ksmbd_work *work,
struct ksmbd_share_config *share,
struct smb2_file_link_info *file_info,
unsigned int buf_len, struct file *filp,
struct nls_table *local_nls)
{
char *link_name = NULL, *target_name = NULL, *pathname = NULL;
struct path path;
bool file_present = true;
int rc;
if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
le32_to_cpu(file_info->FileNameLength))
return -EINVAL;
ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
pathname = kmalloc(PATH_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
link_name = smb2_get_name(file_info->FileName,
le32_to_cpu(file_info->FileNameLength),
local_nls);
if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
rc = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "link name is %s\n", link_name);
target_name = file_path(filp, pathname, PATH_MAX);
if (IS_ERR(target_name)) {
rc = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "target name is %s\n", target_name);
rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
if (rc) {
if (rc != -ENOENT)
goto out;
file_present = false;
} else {
path_put(&path);
}
if (file_info->ReplaceIfExists) {
if (file_present) {
rc = ksmbd_vfs_remove_file(work, link_name);
if (rc) {
rc = -EINVAL;
ksmbd_debug(SMB, "cannot delete %s\n",
link_name);
goto out;
}
}
} else {
if (file_present) {
rc = -EEXIST;
ksmbd_debug(SMB, "link already exists\n");
goto out;
}
}
rc = ksmbd_vfs_link(work, target_name, link_name);
if (rc)
rc = -EINVAL;
out:
if (!IS_ERR(link_name))
kfree(link_name);
kfree(pathname);
return rc;
}
static int set_file_basic_info(struct ksmbd_file *fp,
struct smb2_file_basic_info *file_info,
struct ksmbd_share_config *share)
{
struct iattr attrs;
struct file *filp;
struct inode *inode;
struct mnt_idmap *idmap;
int rc = 0;
if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
return -EACCES;
attrs.ia_valid = 0;
filp = fp->filp;
inode = file_inode(filp);
idmap = file_mnt_idmap(filp);
if (file_info->CreationTime)
fp->create_time = le64_to_cpu(file_info->CreationTime);
if (file_info->LastAccessTime) {
attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
}
attrs.ia_valid |= ATTR_CTIME;
if (file_info->ChangeTime)
attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
else
attrs.ia_ctime = inode->i_ctime;
if (file_info->LastWriteTime) {
attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
}
if (file_info->Attributes) {
if (!S_ISDIR(inode->i_mode) &&
file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
pr_err("can't change a file to a directory\n");
return -EINVAL;
}
if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
fp->f_ci->m_fattr = file_info->Attributes |
(fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
}
if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
(file_info->CreationTime || file_info->Attributes)) {
struct xattr_dos_attrib da = {0};
da.version = 4;
da.itime = fp->itime;
da.create_time = fp->create_time;
da.attr = le32_to_cpu(fp->f_ci->m_fattr);
da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
XATTR_DOSINFO_ITIME;
rc = ksmbd_vfs_set_dos_attrib_xattr(idmap,
filp->f_path.dentry, &da);
if (rc)
ksmbd_debug(SMB,
"failed to restore file attribute in EA\n");
rc = 0;
}
if (attrs.ia_valid) {
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = d_inode(dentry);
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
return -EACCES;
inode_lock(inode);
inode->i_ctime = attrs.ia_ctime;
attrs.ia_valid &= ~ATTR_CTIME;
rc = notify_change(idmap, dentry, &attrs, NULL);
inode_unlock(inode);
}
return rc;
}
static int set_file_allocation_info(struct ksmbd_work *work,
struct ksmbd_file *fp,
struct smb2_file_alloc_info *file_alloc_info)
{
/*
* TODO : It's working fine only when store dos attributes
* is not yes. need to implement a logic which works
* properly with any smb.conf option
*/
loff_t alloc_blks;
struct inode *inode;
int rc;
if (!(fp->daccess & FILE_WRITE_DATA_LE))
return -EACCES;
alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
inode = file_inode(fp->filp);
if (alloc_blks > inode->i_blocks) {
smb_break_all_levII_oplock(work, fp, 1);
rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
alloc_blks * 512);
if (rc && rc != -EOPNOTSUPP) {
pr_err("vfs_fallocate is failed : %d\n", rc);
return rc;
}
} else if (alloc_blks < inode->i_blocks) {
loff_t size;
/*
* Allocation size could be smaller than original one
* which means allocated blocks in file should be
* deallocated. use truncate to cut out it, but inode
* size is also updated with truncate offset.
* inode size is retained by backup inode size.
*/
size = i_size_read(inode);
rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
if (rc) {
pr_err("truncate failed!, err %d\n", rc);
return rc;
}
if (size < alloc_blks * 512)
i_size_write(inode, size);
}
return 0;
}
static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_file_eof_info *file_eof_info)
{
loff_t newsize;
struct inode *inode;
int rc;
if (!(fp->daccess & FILE_WRITE_DATA_LE))
return -EACCES;
newsize = le64_to_cpu(file_eof_info->EndOfFile);
inode = file_inode(fp->filp);
/*
* If FILE_END_OF_FILE_INFORMATION of set_info_file is called
* on FAT32 shared device, truncate execution time is too long
* and network error could cause from windows client. because
* truncate of some filesystem like FAT32 fill zero data in
* truncated range.
*/
if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
rc = ksmbd_vfs_truncate(work, fp, newsize);
if (rc) {
ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
if (rc != -EAGAIN)
rc = -EBADF;
return rc;
}
}
return 0;
}
static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_file_rename_info *rename_info,
unsigned int buf_len)
{
struct mnt_idmap *idmap;
struct ksmbd_file *parent_fp;
struct dentry *parent;
struct dentry *dentry = fp->filp->f_path.dentry;
int ret;
if (!(fp->daccess & FILE_DELETE_LE)) {
pr_err("no right to delete : 0x%x\n", fp->daccess);
return -EACCES;
}
if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
le32_to_cpu(rename_info->FileNameLength))
return -EINVAL;
idmap = file_mnt_idmap(fp->filp);
if (ksmbd_stream_fd(fp))
goto next;
parent = dget_parent(dentry);
ret = ksmbd_vfs_lock_parent(idmap, parent, dentry);
if (ret) {
dput(parent);
return ret;
}
parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
inode_unlock(d_inode(parent));
dput(parent);
if (parent_fp) {
if (parent_fp->daccess & FILE_DELETE_LE) {
pr_err("parent dir is opened with delete access\n");
ksmbd_fd_put(work, parent_fp);
return -ESHARE;
}
ksmbd_fd_put(work, parent_fp);
}
next:
return smb2_rename(work, fp, idmap, rename_info,
work->conn->local_nls);
}
static int set_file_disposition_info(struct ksmbd_file *fp,
struct smb2_file_disposition_info *file_info)
{
struct inode *inode;
if (!(fp->daccess & FILE_DELETE_LE)) {
pr_err("no right to delete : 0x%x\n", fp->daccess);
return -EACCES;
}
inode = file_inode(fp->filp);
if (file_info->DeletePending) {
if (S_ISDIR(inode->i_mode) &&
ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
return -EBUSY;
ksmbd_set_inode_pending_delete(fp);
} else {
ksmbd_clear_inode_pending_delete(fp);
}
return 0;
}
static int set_file_position_info(struct ksmbd_file *fp,
struct smb2_file_pos_info *file_info)
{
loff_t current_byte_offset;
unsigned long sector_size;
struct inode *inode;
inode = file_inode(fp->filp);
current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
sector_size = inode->i_sb->s_blocksize;
if (current_byte_offset < 0 ||
(fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
current_byte_offset & (sector_size - 1))) {
pr_err("CurrentByteOffset is not valid : %llu\n",
current_byte_offset);
return -EINVAL;
}
fp->filp->f_pos = current_byte_offset;
return 0;
}
static int set_file_mode_info(struct ksmbd_file *fp,
struct smb2_file_mode_info *file_info)
{
__le32 mode;
mode = file_info->Mode;
if ((mode & ~FILE_MODE_INFO_MASK)) {
pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
return -EINVAL;
}
/*
* TODO : need to implement consideration for
* FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
*/
ksmbd_vfs_set_fadvise(fp->filp, mode);
fp->coption = mode;
return 0;
}
/**
* smb2_set_info_file() - handler for smb2 set info command
* @work: smb work containing set info command buffer
* @fp: ksmbd_file pointer
* @req: request buffer pointer
* @share: ksmbd_share_config pointer
*
* Return: 0 on success, otherwise error
* TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
*/
static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
struct smb2_set_info_req *req,
struct ksmbd_share_config *share)
{
unsigned int buf_len = le32_to_cpu(req->BufferLength);
switch (req->FileInfoClass) {
case FILE_BASIC_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_basic_info))
return -EINVAL;
return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
}
case FILE_ALLOCATION_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_alloc_info))
return -EINVAL;
return set_file_allocation_info(work, fp,
(struct smb2_file_alloc_info *)req->Buffer);
}
case FILE_END_OF_FILE_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_eof_info))
return -EINVAL;
return set_end_of_file_info(work, fp,
(struct smb2_file_eof_info *)req->Buffer);
}
case FILE_RENAME_INFORMATION:
{
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
return -EACCES;
}
if (buf_len < sizeof(struct smb2_file_rename_info))
return -EINVAL;
return set_rename_info(work, fp,
(struct smb2_file_rename_info *)req->Buffer,
buf_len);
}
case FILE_LINK_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_link_info))
return -EINVAL;
return smb2_create_link(work, work->tcon->share_conf,
(struct smb2_file_link_info *)req->Buffer,
buf_len, fp->filp,
work->conn->local_nls);
}
case FILE_DISPOSITION_INFORMATION:
{
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
return -EACCES;
}
if (buf_len < sizeof(struct smb2_file_disposition_info))
return -EINVAL;
return set_file_disposition_info(fp,
(struct smb2_file_disposition_info *)req->Buffer);
}
case FILE_FULL_EA_INFORMATION:
{
if (!(fp->daccess & FILE_WRITE_EA_LE)) {
pr_err("Not permitted to write ext attr: 0x%x\n",
fp->daccess);
return -EACCES;
}
if (buf_len < sizeof(struct smb2_ea_info))
return -EINVAL;
return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
buf_len, &fp->filp->f_path);
}
case FILE_POSITION_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_pos_info))
return -EINVAL;
return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
}
case FILE_MODE_INFORMATION:
{
if (buf_len < sizeof(struct smb2_file_mode_info))
return -EINVAL;
return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
}
}
pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
return -EOPNOTSUPP;
}
static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
char *buffer, int buf_len)
{
struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
fp->saccess |= FILE_SHARE_DELETE_LE;
return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
buf_len, false);
}
/**
* smb2_set_info() - handler for smb2 set info command handler
* @work: smb work containing set info request buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_set_info(struct ksmbd_work *work)
{
struct smb2_set_info_req *req;
struct smb2_set_info_rsp *rsp;
struct ksmbd_file *fp;
int rc = 0;
unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
ksmbd_debug(SMB, "Received set info request\n");
if (work->next_smb2_rcv_hdr_off) {
req = ksmbd_req_buf_next(work);
rsp = ksmbd_resp_buf_next(work);
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
pid = work->compound_pfid;
}
} else {
req = smb2_get_msg(work->request_buf);
rsp = smb2_get_msg(work->response_buf);
}
if (!has_file_id(id)) {
id = req->VolatileFileId;
pid = req->PersistentFileId;
}
fp = ksmbd_lookup_fd_slow(work, id, pid);
if (!fp) {
ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
rc = -ENOENT;
goto err_out;
}
switch (req->InfoType) {
case SMB2_O_INFO_FILE:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
break;
case SMB2_O_INFO_SECURITY:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
if (ksmbd_override_fsids(work)) {
rc = -ENOMEM;
goto err_out;
}
rc = smb2_set_info_sec(fp,
le32_to_cpu(req->AdditionalInformation),
req->Buffer,
le32_to_cpu(req->BufferLength));
ksmbd_revert_fsids(work);
break;
default:
rc = -EOPNOTSUPP;
}
if (rc < 0)
goto err_out;
rsp->StructureSize = cpu_to_le16(2);
inc_rfc1001_len(work->response_buf, 2);
ksmbd_fd_put(work, fp);
return 0;
err_out:
if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (rc == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (rc == -ESHARE)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (rc == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
else if (rc == -EBUSY || rc == -ENOTEMPTY)
rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
else if (rc == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (rc == -EBADF || rc == -ESTALE)
rsp->hdr.Status = STATUS_INVALID_HANDLE;
else if (rc == -EEXIST)
rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
return rc;
}
/**
* smb2_read_pipe() - handler for smb2 read from IPC pipe
* @work: smb work containing read IPC pipe command buffer
*
* Return: 0 on success, otherwise error
*/
static noinline int smb2_read_pipe(struct ksmbd_work *work)
{
int nbytes = 0, err;
u64 id;
struct ksmbd_rpc_command *rpc_resp;
struct smb2_read_req *req = smb2_get_msg(work->request_buf);
struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
id = req->VolatileFileId;
inc_rfc1001_len(work->response_buf, 16);
rpc_resp = ksmbd_rpc_read(work->sess, id);
if (rpc_resp) {
if (rpc_resp->flags != KSMBD_RPC_OK) {
err = -EINVAL;
goto out;
}
work->aux_payload_buf =
kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
if (!work->aux_payload_buf) {
err = -ENOMEM;
goto out;
}
memcpy(work->aux_payload_buf, rpc_resp->payload,
rpc_resp->payload_sz);
nbytes = rpc_resp->payload_sz;
work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
work->aux_payload_sz = nbytes;
kvfree(rpc_resp);
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 80;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(nbytes);
rsp->DataRemaining = 0;
rsp->Flags = 0;
inc_rfc1001_len(work->response_buf, nbytes);
return 0;
out:
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
smb2_set_err_rsp(work);
kvfree(rpc_resp);
return err;
}
static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
struct smb2_buffer_desc_v1 *desc,
__le32 Channel,
__le16 ChannelInfoLength)
{
unsigned int i, ch_count;
if (work->conn->dialect == SMB30_PROT_ID &&
Channel != SMB2_CHANNEL_RDMA_V1)
return -EINVAL;
ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
for (i = 0; i < ch_count; i++) {
pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
i,
le32_to_cpu(desc[i].token),
le32_to_cpu(desc[i].length));
}
}
if (!ch_count)
return -EINVAL;
work->need_invalidate_rkey =
(Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
work->remote_key = le32_to_cpu(desc->token);
return 0;
}
static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
struct smb2_read_req *req, void *data_buf,
size_t length)
{
int err;
err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
(struct smb2_buffer_desc_v1 *)
((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
le16_to_cpu(req->ReadChannelInfoLength));
if (err)
return err;
return length;
}
/**
* smb2_read() - handler for smb2 read from file
* @work: smb work containing read command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_read(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_read_req *req;
struct smb2_read_rsp *rsp;
struct ksmbd_file *fp = NULL;
loff_t offset;
size_t length, mincount;
ssize_t nbytes = 0, remain_bytes = 0;
int err = 0;
bool is_rdma_channel = false;
unsigned int max_read_size = conn->vals->max_read_size;
WORK_BUFFERS(work, req, rsp);
if (test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe read request\n");
return smb2_read_pipe(work);
}
if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
req->Channel == SMB2_CHANNEL_RDMA_V1) {
is_rdma_channel = true;
max_read_size = get_smbd_max_read_write_size();
}
if (is_rdma_channel == true) {
unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
err = -EINVAL;
goto out;
}
err = smb2_set_remote_key_for_rdma(work,
(struct smb2_buffer_desc_v1 *)
((char *)req + ch_offset),
req->Channel,
req->ReadChannelInfoLength);
if (err)
goto out;
}
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp) {
err = -ENOENT;
goto out;
}
if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
pr_err("Not permitted to read : 0x%x\n", fp->daccess);
err = -EACCES;
goto out;
}
offset = le64_to_cpu(req->Offset);
length = le32_to_cpu(req->Length);
mincount = le32_to_cpu(req->MinimumCount);
if (length > max_read_size) {
ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
max_read_size);
err = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
fp->filp, offset, length);
work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
if (!work->aux_payload_buf) {
err = -ENOMEM;
goto out;
}
nbytes = ksmbd_vfs_read(work, fp, length, &offset);
if (nbytes < 0) {
err = nbytes;
goto out;
}
if ((nbytes == 0 && length != 0) || nbytes < mincount) {
kvfree(work->aux_payload_buf);
work->aux_payload_buf = NULL;
rsp->hdr.Status = STATUS_END_OF_FILE;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return 0;
}
ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
nbytes, offset, mincount);
if (is_rdma_channel == true) {
/* write data to the client using rdma channel */
remain_bytes = smb2_read_rdma_channel(work, req,
work->aux_payload_buf,
nbytes);
kvfree(work->aux_payload_buf);
work->aux_payload_buf = NULL;
nbytes = 0;
if (remain_bytes < 0) {
err = (int)remain_bytes;
goto out;
}
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 80;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(nbytes);
rsp->DataRemaining = cpu_to_le32(remain_bytes);
rsp->Flags = 0;
inc_rfc1001_len(work->response_buf, 16);
work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
work->aux_payload_sz = nbytes;
inc_rfc1001_len(work->response_buf, nbytes);
ksmbd_fd_put(work, fp);
return 0;
out:
if (err) {
if (err == -EISDIR)
rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
else if (err == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (err == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (err == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (err == -ESHARE)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (err == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
}
ksmbd_fd_put(work, fp);
return err;
}
/**
* smb2_write_pipe() - handler for smb2 write on IPC pipe
* @work: smb work containing write IPC pipe command buffer
*
* Return: 0 on success, otherwise error
*/
static noinline int smb2_write_pipe(struct ksmbd_work *work)
{
struct smb2_write_req *req = smb2_get_msg(work->request_buf);
struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_rpc_command *rpc_resp;
u64 id = 0;
int err = 0, ret = 0;
char *data_buf;
size_t length;
length = le32_to_cpu(req->Length);
id = req->VolatileFileId;
if ((u64)le16_to_cpu(req->DataOffset) + length >
get_rfc1002_len(work->request_buf)) {
pr_err("invalid write data offset %u, smb_len %u\n",
le16_to_cpu(req->DataOffset),
get_rfc1002_len(work->request_buf));
err = -EINVAL;
goto out;
}
data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
le16_to_cpu(req->DataOffset));
rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
if (rpc_resp) {
if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
kvfree(rpc_resp);
smb2_set_err_rsp(work);
return -EOPNOTSUPP;
}
if (rpc_resp->flags != KSMBD_RPC_OK) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
kvfree(rpc_resp);
return ret;
}
kvfree(rpc_resp);
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 0;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(length);
rsp->DataRemaining = 0;
rsp->Reserved2 = 0;
inc_rfc1001_len(work->response_buf, 16);
return 0;
out:
if (err) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
}
return err;
}
static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
struct smb2_write_req *req,
struct ksmbd_file *fp,
loff_t offset, size_t length, bool sync)
{
char *data_buf;
int ret;
ssize_t nbytes;
data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
if (!data_buf)
return -ENOMEM;
ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
(struct smb2_buffer_desc_v1 *)
((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
le16_to_cpu(req->WriteChannelInfoLength));
if (ret < 0) {
kvfree(data_buf);
return ret;
}
ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
kvfree(data_buf);
if (ret < 0)
return ret;
return nbytes;
}
/**
* smb2_write() - handler for smb2 write from file
* @work: smb work containing write command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_write(struct ksmbd_work *work)
{
struct smb2_write_req *req;
struct smb2_write_rsp *rsp;
struct ksmbd_file *fp = NULL;
loff_t offset;
size_t length;
ssize_t nbytes;
char *data_buf;
bool writethrough = false, is_rdma_channel = false;
int err = 0;
unsigned int max_write_size = work->conn->vals->max_write_size;
WORK_BUFFERS(work, req, rsp);
if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
ksmbd_debug(SMB, "IPC pipe write request\n");
return smb2_write_pipe(work);
}
offset = le64_to_cpu(req->Offset);
length = le32_to_cpu(req->Length);
if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
is_rdma_channel = true;
max_write_size = get_smbd_max_read_write_size();
length = le32_to_cpu(req->RemainingBytes);
}
if (is_rdma_channel == true) {
unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
if (req->Length != 0 || req->DataOffset != 0 ||
ch_offset < offsetof(struct smb2_write_req, Buffer)) {
err = -EINVAL;
goto out;
}
err = smb2_set_remote_key_for_rdma(work,
(struct smb2_buffer_desc_v1 *)
((char *)req + ch_offset),
req->Channel,
req->WriteChannelInfoLength);
if (err)
goto out;
}
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB, "User does not have write permission\n");
err = -EACCES;
goto out;
}
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp) {
err = -ENOENT;
goto out;
}
if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
pr_err("Not permitted to write : 0x%x\n", fp->daccess);
err = -EACCES;
goto out;
}
if (length > max_write_size) {
ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
max_write_size);
err = -EINVAL;
goto out;
}
ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
writethrough = true;
if (is_rdma_channel == false) {
if (le16_to_cpu(req->DataOffset) <
offsetof(struct smb2_write_req, Buffer)) {
err = -EINVAL;
goto out;
}
data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
le16_to_cpu(req->DataOffset));
ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
fp->filp, offset, length);
err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
writethrough, &nbytes);
if (err < 0)
goto out;
} else {
/* read data from the client using rdma channel, and
* write the data.
*/
nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
writethrough);
if (nbytes < 0) {
err = (int)nbytes;
goto out;
}
}
rsp->StructureSize = cpu_to_le16(17);
rsp->DataOffset = 0;
rsp->Reserved = 0;
rsp->DataLength = cpu_to_le32(nbytes);
rsp->DataRemaining = 0;
rsp->Reserved2 = 0;
inc_rfc1001_len(work->response_buf, 16);
ksmbd_fd_put(work, fp);
return 0;
out:
if (err == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (err == -ENOSPC || err == -EFBIG)
rsp->hdr.Status = STATUS_DISK_FULL;
else if (err == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else if (err == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (err == -ESHARE)
rsp->hdr.Status = STATUS_SHARING_VIOLATION;
else if (err == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return err;
}
/**
* smb2_flush() - handler for smb2 flush file - fsync
* @work: smb work containing flush command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_flush(struct ksmbd_work *work)
{
struct smb2_flush_req *req;
struct smb2_flush_rsp *rsp;
int err;
WORK_BUFFERS(work, req, rsp);
ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
if (err)
goto out;
rsp->StructureSize = cpu_to_le16(4);
rsp->Reserved = 0;
inc_rfc1001_len(work->response_buf, 4);
return 0;
out:
if (err) {
rsp->hdr.Status = STATUS_INVALID_HANDLE;
smb2_set_err_rsp(work);
}
return err;
}
/**
* smb2_cancel() - handler for smb2 cancel command
* @work: smb work containing cancel command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_cancel(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
struct smb2_hdr *chdr;
struct ksmbd_work *iter;
struct list_head *command_list;
ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
hdr->MessageId, hdr->Flags);
if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
command_list = &conn->async_requests;
spin_lock(&conn->request_lock);
list_for_each_entry(iter, command_list,
async_request_entry) {
chdr = smb2_get_msg(iter->request_buf);
if (iter->async_id !=
le64_to_cpu(hdr->Id.AsyncId))
continue;
ksmbd_debug(SMB,
"smb2 with AsyncId %llu cancelled command = 0x%x\n",
le64_to_cpu(hdr->Id.AsyncId),
le16_to_cpu(chdr->Command));
iter->state = KSMBD_WORK_CANCELLED;
if (iter->cancel_fn)
iter->cancel_fn(iter->cancel_argv);
break;
}
spin_unlock(&conn->request_lock);
} else {
command_list = &conn->requests;
spin_lock(&conn->request_lock);
list_for_each_entry(iter, command_list, request_entry) {
chdr = smb2_get_msg(iter->request_buf);
if (chdr->MessageId != hdr->MessageId ||
iter == work)
continue;
ksmbd_debug(SMB,
"smb2 with mid %llu cancelled command = 0x%x\n",
le64_to_cpu(hdr->MessageId),
le16_to_cpu(chdr->Command));
iter->state = KSMBD_WORK_CANCELLED;
break;
}
spin_unlock(&conn->request_lock);
}
/* For SMB2_CANCEL command itself send no response*/
work->send_no_response = 1;
return 0;
}
struct file_lock *smb_flock_init(struct file *f)
{
struct file_lock *fl;
fl = locks_alloc_lock();
if (!fl)
goto out;
locks_init_lock(fl);
fl->fl_owner = f;
fl->fl_pid = current->tgid;
fl->fl_file = f;
fl->fl_flags = FL_POSIX;
fl->fl_ops = NULL;
fl->fl_lmops = NULL;
out:
return fl;
}
static int smb2_set_flock_flags(struct file_lock *flock, int flags)
{
int cmd = -EINVAL;
/* Checking for wrong flag combination during lock request*/
switch (flags) {
case SMB2_LOCKFLAG_SHARED:
ksmbd_debug(SMB, "received shared request\n");
cmd = F_SETLKW;
flock->fl_type = F_RDLCK;
flock->fl_flags |= FL_SLEEP;
break;
case SMB2_LOCKFLAG_EXCLUSIVE:
ksmbd_debug(SMB, "received exclusive request\n");
cmd = F_SETLKW;
flock->fl_type = F_WRLCK;
flock->fl_flags |= FL_SLEEP;
break;
case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
ksmbd_debug(SMB,
"received shared & fail immediately request\n");
cmd = F_SETLK;
flock->fl_type = F_RDLCK;
break;
case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
ksmbd_debug(SMB,
"received exclusive & fail immediately request\n");
cmd = F_SETLK;
flock->fl_type = F_WRLCK;
break;
case SMB2_LOCKFLAG_UNLOCK:
ksmbd_debug(SMB, "received unlock request\n");
flock->fl_type = F_UNLCK;
cmd = F_SETLK;
break;
}
return cmd;
}
static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
unsigned int cmd, int flags,
struct list_head *lock_list)
{
struct ksmbd_lock *lock;
lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
if (!lock)
return NULL;
lock->cmd = cmd;
lock->fl = flock;
lock->start = flock->fl_start;
lock->end = flock->fl_end;
lock->flags = flags;
if (lock->start == lock->end)
lock->zero_len = 1;
INIT_LIST_HEAD(&lock->clist);
INIT_LIST_HEAD(&lock->flist);
INIT_LIST_HEAD(&lock->llist);
list_add_tail(&lock->llist, lock_list);
return lock;
}
static void smb2_remove_blocked_lock(void **argv)
{
struct file_lock *flock = (struct file_lock *)argv[0];
ksmbd_vfs_posix_lock_unblock(flock);
wake_up(&flock->fl_wait);
}
static inline bool lock_defer_pending(struct file_lock *fl)
{
/* check pending lock waiters */
return waitqueue_active(&fl->fl_wait);
}
/**
* smb2_lock() - handler for smb2 file lock command
* @work: smb work containing lock command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_lock(struct ksmbd_work *work)
{
struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
struct smb2_lock_element *lock_ele;
struct ksmbd_file *fp = NULL;
struct file_lock *flock = NULL;
struct file *filp = NULL;
int lock_count;
int flags = 0;
int cmd = 0;
int err = -EIO, i, rc = 0;
u64 lock_start, lock_length;
struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
struct ksmbd_conn *conn;
int nolock = 0;
LIST_HEAD(lock_list);
LIST_HEAD(rollback_list);
int prior_lock = 0;
ksmbd_debug(SMB, "Received lock request\n");
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp) {
ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
err = -ENOENT;
goto out2;
}
filp = fp->filp;
lock_count = le16_to_cpu(req->LockCount);
lock_ele = req->locks;
ksmbd_debug(SMB, "lock count is %d\n", lock_count);
if (!lock_count) {
err = -EINVAL;
goto out2;
}
for (i = 0; i < lock_count; i++) {
flags = le32_to_cpu(lock_ele[i].Flags);
flock = smb_flock_init(filp);
if (!flock)
goto out;
cmd = smb2_set_flock_flags(flock, flags);
lock_start = le64_to_cpu(lock_ele[i].Offset);
lock_length = le64_to_cpu(lock_ele[i].Length);
if (lock_start > U64_MAX - lock_length) {
pr_err("Invalid lock range requested\n");
rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
locks_free_lock(flock);
goto out;
}
if (lock_start > OFFSET_MAX)
flock->fl_start = OFFSET_MAX;
else
flock->fl_start = lock_start;
lock_length = le64_to_cpu(lock_ele[i].Length);
if (lock_length > OFFSET_MAX - flock->fl_start)
lock_length = OFFSET_MAX - flock->fl_start;
flock->fl_end = flock->fl_start + lock_length;
if (flock->fl_end < flock->fl_start) {
ksmbd_debug(SMB,
"the end offset(%llx) is smaller than the start offset(%llx)\n",
flock->fl_end, flock->fl_start);
rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
locks_free_lock(flock);
goto out;
}
/* Check conflict locks in one request */
list_for_each_entry(cmp_lock, &lock_list, llist) {
if (cmp_lock->fl->fl_start <= flock->fl_start &&
cmp_lock->fl->fl_end >= flock->fl_end) {
if (cmp_lock->fl->fl_type != F_UNLCK &&
flock->fl_type != F_UNLCK) {
pr_err("conflict two locks in one request\n");
err = -EINVAL;
locks_free_lock(flock);
goto out;
}
}
}
smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
if (!smb_lock) {
err = -EINVAL;
locks_free_lock(flock);
goto out;
}
}
list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
if (smb_lock->cmd < 0) {
err = -EINVAL;
goto out;
}
if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
err = -EINVAL;
goto out;
}
if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
(prior_lock == SMB2_LOCKFLAG_UNLOCK &&
!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
err = -EINVAL;
goto out;
}
prior_lock = smb_lock->flags;
if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
!(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
goto no_check_cl;
nolock = 1;
/* check locks in connection list */
down_read(&conn_list_lock);
list_for_each_entry(conn, &conn_list, conns_list) {
spin_lock(&conn->llist_lock);
list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
if (file_inode(cmp_lock->fl->fl_file) !=
file_inode(smb_lock->fl->fl_file))
continue;
if (smb_lock->fl->fl_type == F_UNLCK) {
if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
cmp_lock->start == smb_lock->start &&
cmp_lock->end == smb_lock->end &&
!lock_defer_pending(cmp_lock->fl)) {
nolock = 0;
list_del(&cmp_lock->flist);
list_del(&cmp_lock->clist);
spin_unlock(&conn->llist_lock);
up_read(&conn_list_lock);
locks_free_lock(cmp_lock->fl);
kfree(cmp_lock);
goto out_check_cl;
}
continue;
}
if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
continue;
} else {
if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
continue;
}
/* check zero byte lock range */
if (cmp_lock->zero_len && !smb_lock->zero_len &&
cmp_lock->start > smb_lock->start &&
cmp_lock->start < smb_lock->end) {
spin_unlock(&conn->llist_lock);
up_read(&conn_list_lock);
pr_err("previous lock conflict with zero byte lock range\n");
goto out;
}
if (smb_lock->zero_len && !cmp_lock->zero_len &&
smb_lock->start > cmp_lock->start &&
smb_lock->start < cmp_lock->end) {
spin_unlock(&conn->llist_lock);
up_read(&conn_list_lock);
pr_err("current lock conflict with zero byte lock range\n");
goto out;
}
if (((cmp_lock->start <= smb_lock->start &&
cmp_lock->end > smb_lock->start) ||
(cmp_lock->start < smb_lock->end &&
cmp_lock->end >= smb_lock->end)) &&
!cmp_lock->zero_len && !smb_lock->zero_len) {
spin_unlock(&conn->llist_lock);
up_read(&conn_list_lock);
pr_err("Not allow lock operation on exclusive lock range\n");
goto out;
}
}
spin_unlock(&conn->llist_lock);
}
up_read(&conn_list_lock);
out_check_cl:
if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
pr_err("Try to unlock nolocked range\n");
rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
goto out;
}
no_check_cl:
if (smb_lock->zero_len) {
err = 0;
goto skip;
}
flock = smb_lock->fl;
list_del(&smb_lock->llist);
retry:
rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
skip:
if (flags & SMB2_LOCKFLAG_UNLOCK) {
if (!rc) {
ksmbd_debug(SMB, "File unlocked\n");
} else if (rc == -ENOENT) {
rsp->hdr.Status = STATUS_NOT_LOCKED;
goto out;
}
locks_free_lock(flock);
kfree(smb_lock);
} else {
if (rc == FILE_LOCK_DEFERRED) {
void **argv;
ksmbd_debug(SMB,
"would have to wait for getting lock\n");
spin_lock(&work->conn->llist_lock);
list_add_tail(&smb_lock->clist,
&work->conn->lock_list);
spin_unlock(&work->conn->llist_lock);
list_add(&smb_lock->llist, &rollback_list);
argv = kmalloc(sizeof(void *), GFP_KERNEL);
if (!argv) {
err = -ENOMEM;
goto out;
}
argv[0] = flock;
rc = setup_async_work(work,
smb2_remove_blocked_lock,
argv);
if (rc) {
err = -ENOMEM;
goto out;
}
spin_lock(&fp->f_lock);
list_add(&work->fp_entry, &fp->blocked_works);
spin_unlock(&fp->f_lock);
smb2_send_interim_resp(work, STATUS_PENDING);
ksmbd_vfs_posix_lock_wait(flock);
spin_lock(&fp->f_lock);
list_del(&work->fp_entry);
spin_unlock(&fp->f_lock);
if (work->state != KSMBD_WORK_ACTIVE) {
list_del(&smb_lock->llist);
spin_lock(&work->conn->llist_lock);
list_del(&smb_lock->clist);
spin_unlock(&work->conn->llist_lock);
locks_free_lock(flock);
if (work->state == KSMBD_WORK_CANCELLED) {
rsp->hdr.Status =
STATUS_CANCELLED;
kfree(smb_lock);
smb2_send_interim_resp(work,
STATUS_CANCELLED);
work->send_no_response = 1;
goto out;
}
init_smb2_rsp_hdr(work);
smb2_set_err_rsp(work);
rsp->hdr.Status =
STATUS_RANGE_NOT_LOCKED;
kfree(smb_lock);
goto out2;
}
list_del(&smb_lock->llist);
spin_lock(&work->conn->llist_lock);
list_del(&smb_lock->clist);
spin_unlock(&work->conn->llist_lock);
release_async_work(work);
goto retry;
} else if (!rc) {
spin_lock(&work->conn->llist_lock);
list_add_tail(&smb_lock->clist,
&work->conn->lock_list);
list_add_tail(&smb_lock->flist,
&fp->lock_list);
spin_unlock(&work->conn->llist_lock);
list_add(&smb_lock->llist, &rollback_list);
ksmbd_debug(SMB, "successful in taking lock\n");
} else {
goto out;
}
}
}
if (atomic_read(&fp->f_ci->op_count) > 1)
smb_break_all_oplock(work, fp);
rsp->StructureSize = cpu_to_le16(4);
ksmbd_debug(SMB, "successful in taking lock\n");
rsp->hdr.Status = STATUS_SUCCESS;
rsp->Reserved = 0;
inc_rfc1001_len(work->response_buf, 4);
ksmbd_fd_put(work, fp);
return 0;
out:
list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
locks_free_lock(smb_lock->fl);
list_del(&smb_lock->llist);
kfree(smb_lock);
}
list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
struct file_lock *rlock = NULL;
rlock = smb_flock_init(filp);
rlock->fl_type = F_UNLCK;
rlock->fl_start = smb_lock->start;
rlock->fl_end = smb_lock->end;
rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
if (rc)
pr_err("rollback unlock fail : %d\n", rc);
list_del(&smb_lock->llist);
spin_lock(&work->conn->llist_lock);
if (!list_empty(&smb_lock->flist))
list_del(&smb_lock->flist);
list_del(&smb_lock->clist);
spin_unlock(&work->conn->llist_lock);
locks_free_lock(smb_lock->fl);
locks_free_lock(rlock);
kfree(smb_lock);
}
out2:
ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
if (!rsp->hdr.Status) {
if (err == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (err == -ENOMEM)
rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
else if (err == -ENOENT)
rsp->hdr.Status = STATUS_FILE_CLOSED;
else
rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
}
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return err;
}
static int fsctl_copychunk(struct ksmbd_work *work,
struct copychunk_ioctl_req *ci_req,
unsigned int cnt_code,
unsigned int input_count,
unsigned long long volatile_id,
unsigned long long persistent_id,
struct smb2_ioctl_rsp *rsp)
{
struct copychunk_ioctl_rsp *ci_rsp;
struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
struct srv_copychunk *chunks;
unsigned int i, chunk_count, chunk_count_written = 0;
unsigned int chunk_size_written = 0;
loff_t total_size_written = 0;
int ret = 0;
ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
rsp->VolatileFileId = volatile_id;
rsp->PersistentFileId = persistent_id;
ci_rsp->ChunksWritten =
cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
ci_rsp->ChunkBytesWritten =
cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
ci_rsp->TotalBytesWritten =
cpu_to_le32(ksmbd_server_side_copy_max_total_size());
chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
chunk_count = le32_to_cpu(ci_req->ChunkCount);
if (chunk_count == 0)
goto out;
total_size_written = 0;
/* verify the SRV_COPYCHUNK_COPY packet */
if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
chunk_count * sizeof(struct srv_copychunk)) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
return -EINVAL;
}
for (i = 0; i < chunk_count; i++) {
if (le32_to_cpu(chunks[i].Length) == 0 ||
le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
break;
total_size_written += le32_to_cpu(chunks[i].Length);
}
if (i < chunk_count ||
total_size_written > ksmbd_server_side_copy_max_total_size()) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
return -EINVAL;
}
src_fp = ksmbd_lookup_foreign_fd(work,
le64_to_cpu(ci_req->ResumeKey[0]));
dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
ret = -EINVAL;
if (!src_fp ||
src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
goto out;
}
if (!dst_fp) {
rsp->hdr.Status = STATUS_FILE_CLOSED;
goto out;
}
/*
* FILE_READ_DATA should only be included in
* the FSCTL_COPYCHUNK case
*/
if (cnt_code == FSCTL_COPYCHUNK &&
!(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
rsp->hdr.Status = STATUS_ACCESS_DENIED;
goto out;
}
ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
chunks, chunk_count,
&chunk_count_written,
&chunk_size_written,
&total_size_written);
if (ret < 0) {
if (ret == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
if (ret == -EAGAIN)
rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
else if (ret == -EBADF)
rsp->hdr.Status = STATUS_INVALID_HANDLE;
else if (ret == -EFBIG || ret == -ENOSPC)
rsp->hdr.Status = STATUS_DISK_FULL;
else if (ret == -EINVAL)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
else if (ret == -EISDIR)
rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
else if (ret == -E2BIG)
rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
else
rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
}
ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
out:
ksmbd_fd_put(work, src_fp);
ksmbd_fd_put(work, dst_fp);
return ret;
}
static __be32 idev_ipv4_address(struct in_device *idev)
{
__be32 addr = 0;
struct in_ifaddr *ifa;
rcu_read_lock();
in_dev_for_each_ifa_rcu(ifa, idev) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
addr = ifa->ifa_address;
break;
}
rcu_read_unlock();
return addr;
}
static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
struct smb2_ioctl_rsp *rsp,
unsigned int out_buf_len)
{
struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
int nbytes = 0;
struct net_device *netdev;
struct sockaddr_storage_rsp *sockaddr_storage;
unsigned int flags;
unsigned long long speed;
rtnl_lock();
for_each_netdev(&init_net, netdev) {
bool ipv4_set = false;
if (netdev->type == ARPHRD_LOOPBACK)
continue;
flags = dev_get_flags(netdev);
if (!(flags & IFF_RUNNING))
continue;
ipv6_retry:
if (out_buf_len <
nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
rtnl_unlock();
return -ENOSPC;
}
nii_rsp = (struct network_interface_info_ioctl_rsp *)
&rsp->Buffer[nbytes];
nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
nii_rsp->Capability = 0;
if (netdev->real_num_tx_queues > 1)
nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
if (ksmbd_rdma_capable_netdev(netdev))
nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
nii_rsp->Next = cpu_to_le32(152);
nii_rsp->Reserved = 0;
if (netdev->ethtool_ops->get_link_ksettings) {
struct ethtool_link_ksettings cmd;
netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
speed = cmd.base.speed;
} else {
ksmbd_debug(SMB, "%s %s\n", netdev->name,
"speed is unknown, defaulting to 1Gb/sec");
speed = SPEED_1000;
}
speed *= 1000000;
nii_rsp->LinkSpeed = cpu_to_le64(speed);
sockaddr_storage = (struct sockaddr_storage_rsp *)
nii_rsp->SockAddr_Storage;
memset(sockaddr_storage, 0, 128);
if (!ipv4_set) {
struct in_device *idev;
sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
sockaddr_storage->addr4.Port = 0;
idev = __in_dev_get_rtnl(netdev);
if (!idev)
continue;
sockaddr_storage->addr4.IPv4address =
idev_ipv4_address(idev);
nbytes += sizeof(struct network_interface_info_ioctl_rsp);
ipv4_set = true;
goto ipv6_retry;
} else {
struct inet6_dev *idev6;
struct inet6_ifaddr *ifa;
__u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
sockaddr_storage->addr6.Port = 0;
sockaddr_storage->addr6.FlowInfo = 0;
idev6 = __in6_dev_get(netdev);
if (!idev6)
continue;
list_for_each_entry(ifa, &idev6->addr_list, if_list) {
if (ifa->flags & (IFA_F_TENTATIVE |
IFA_F_DEPRECATED))
continue;
memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
break;
}
sockaddr_storage->addr6.ScopeId = 0;
nbytes += sizeof(struct network_interface_info_ioctl_rsp);
}
}
rtnl_unlock();
/* zero if this is last one */
if (nii_rsp)
nii_rsp->Next = 0;
rsp->PersistentFileId = SMB2_NO_FID;
rsp->VolatileFileId = SMB2_NO_FID;
return nbytes;
}
static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
struct validate_negotiate_info_req *neg_req,
struct validate_negotiate_info_rsp *neg_rsp,
unsigned int in_buf_len)
{
int ret = 0;
int dialect;
if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
return -EINVAL;
dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
neg_req->DialectCount);
if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
ret = -EINVAL;
goto err_out;
}
if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
ret = -EINVAL;
goto err_out;
}
if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
ret = -EINVAL;
goto err_out;
}
if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
ret = -EINVAL;
goto err_out;
}
neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
neg_rsp->Dialect = cpu_to_le16(conn->dialect);
err_out:
return ret;
}
static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
struct file_allocated_range_buffer *qar_req,
struct file_allocated_range_buffer *qar_rsp,
unsigned int in_count, unsigned int *out_count)
{
struct ksmbd_file *fp;
loff_t start, length;
int ret = 0;
*out_count = 0;
if (in_count == 0)
return -EINVAL;
start = le64_to_cpu(qar_req->file_offset);
length = le64_to_cpu(qar_req->length);
if (start < 0 || length < 0)
return -EINVAL;
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp)
return -ENOENT;
ret = ksmbd_vfs_fqar_lseek(fp, start, length,
qar_rsp, in_count, out_count);
if (ret && ret != -E2BIG)
*out_count = 0;
ksmbd_fd_put(work, fp);
return ret;
}
static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
unsigned int out_buf_len,
struct smb2_ioctl_req *req,
struct smb2_ioctl_rsp *rsp)
{
struct ksmbd_rpc_command *rpc_resp;
char *data_buf = (char *)&req->Buffer[0];
int nbytes = 0;
rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
le32_to_cpu(req->InputCount));
if (rpc_resp) {
if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
/*
* set STATUS_SOME_NOT_MAPPED response
* for unknown domain sid.
*/
rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
} else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
goto out;
} else if (rpc_resp->flags != KSMBD_RPC_OK) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto out;
}
nbytes = rpc_resp->payload_sz;
if (rpc_resp->payload_sz > out_buf_len) {
rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
nbytes = out_buf_len;
}
if (!rpc_resp->payload_sz) {
rsp->hdr.Status =
STATUS_UNEXPECTED_IO_ERROR;
goto out;
}
memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
}
out:
kvfree(rpc_resp);
return nbytes;
}
static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
struct file_sparse *sparse)
{
struct ksmbd_file *fp;
struct mnt_idmap *idmap;
int ret = 0;
__le32 old_fattr;
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp)
return -ENOENT;
idmap = file_mnt_idmap(fp->filp);
old_fattr = fp->f_ci->m_fattr;
if (sparse->SetSparse)
fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
else
fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
if (fp->f_ci->m_fattr != old_fattr &&
test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
struct xattr_dos_attrib da;
ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
fp->filp->f_path.dentry, &da);
if (ret <= 0)
goto out;
da.attr = le32_to_cpu(fp->f_ci->m_fattr);
ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
fp->filp->f_path.dentry, &da);
if (ret)
fp->f_ci->m_fattr = old_fattr;
}
out:
ksmbd_fd_put(work, fp);
return ret;
}
static int fsctl_request_resume_key(struct ksmbd_work *work,
struct smb2_ioctl_req *req,
struct resume_key_ioctl_rsp *key_rsp)
{
struct ksmbd_file *fp;
fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
if (!fp)
return -ENOENT;
memset(key_rsp, 0, sizeof(*key_rsp));
key_rsp->ResumeKey[0] = req->VolatileFileId;
key_rsp->ResumeKey[1] = req->PersistentFileId;
ksmbd_fd_put(work, fp);
return 0;
}
/**
* smb2_ioctl() - handler for smb2 ioctl command
* @work: smb work containing ioctl command buffer
*
* Return: 0 on success, otherwise error
*/
int smb2_ioctl(struct ksmbd_work *work)
{
struct smb2_ioctl_req *req;
struct smb2_ioctl_rsp *rsp;
unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
u64 id = KSMBD_NO_FID;
struct ksmbd_conn *conn = work->conn;
int ret = 0;
if (work->next_smb2_rcv_hdr_off) {
req = ksmbd_req_buf_next(work);
rsp = ksmbd_resp_buf_next(work);
if (!has_file_id(req->VolatileFileId)) {
ksmbd_debug(SMB, "Compound request set FID = %llu\n",
work->compound_fid);
id = work->compound_fid;
}
} else {
req = smb2_get_msg(work->request_buf);
rsp = smb2_get_msg(work->response_buf);
}
if (!has_file_id(id))
id = req->VolatileFileId;
if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
goto out;
}
cnt_code = le32_to_cpu(req->CtlCode);
ret = smb2_calc_max_out_buf_len(work, 48,
le32_to_cpu(req->MaxOutputResponse));
if (ret < 0) {
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
goto out;
}
out_buf_len = (unsigned int)ret;
in_buf_len = le32_to_cpu(req->InputCount);
switch (cnt_code) {
case FSCTL_DFS_GET_REFERRALS:
case FSCTL_DFS_GET_REFERRALS_EX:
/* Not support DFS yet */
rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
goto out;
case FSCTL_CREATE_OR_GET_OBJECT_ID:
{
struct file_object_buf_type1_ioctl_rsp *obj_buf;
nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
&rsp->Buffer[0];
/*
* TODO: This is dummy implementation to pass smbtorture
* Need to check correct response later
*/
memset(obj_buf->ObjectId, 0x0, 16);
memset(obj_buf->BirthVolumeId, 0x0, 16);
memset(obj_buf->BirthObjectId, 0x0, 16);
memset(obj_buf->DomainId, 0x0, 16);
break;
}
case FSCTL_PIPE_TRANSCEIVE:
out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
break;
case FSCTL_VALIDATE_NEGOTIATE_INFO:
if (conn->dialect < SMB30_PROT_ID) {
ret = -EOPNOTSUPP;
goto out;
}
if (in_buf_len < offsetof(struct validate_negotiate_info_req,
Dialects)) {
ret = -EINVAL;
goto out;
}
if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_validate_negotiate_info(conn,
(struct validate_negotiate_info_req *)&req->Buffer[0],
(struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
in_buf_len);
if (ret < 0)
goto out;
nbytes = sizeof(struct validate_negotiate_info_rsp);
rsp->PersistentFileId = SMB2_NO_FID;
rsp->VolatileFileId = SMB2_NO_FID;
break;
case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
if (ret < 0)
goto out;
nbytes = ret;
break;
case FSCTL_REQUEST_RESUME_KEY:
if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_request_resume_key(work, req,
(struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
if (ret < 0)
goto out;
rsp->PersistentFileId = req->PersistentFileId;
rsp->VolatileFileId = req->VolatileFileId;
nbytes = sizeof(struct resume_key_ioctl_rsp);
break;
case FSCTL_COPYCHUNK:
case FSCTL_COPYCHUNK_WRITE:
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
ret = -EACCES;
goto out;
}
if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
ret = -EINVAL;
goto out;
}
if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
ret = -EINVAL;
goto out;
}
nbytes = sizeof(struct copychunk_ioctl_rsp);
rsp->VolatileFileId = req->VolatileFileId;
rsp->PersistentFileId = req->PersistentFileId;
fsctl_copychunk(work,
(struct copychunk_ioctl_req *)&req->Buffer[0],
le32_to_cpu(req->CtlCode),
le32_to_cpu(req->InputCount),
req->VolatileFileId,
req->PersistentFileId,
rsp);
break;
case FSCTL_SET_SPARSE:
if (in_buf_len < sizeof(struct file_sparse)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_set_sparse(work, id,
(struct file_sparse *)&req->Buffer[0]);
if (ret < 0)
goto out;
break;
case FSCTL_SET_ZERO_DATA:
{
struct file_zero_data_information *zero_data;
struct ksmbd_file *fp;
loff_t off, len, bfz;
if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
ksmbd_debug(SMB,
"User does not have write permission\n");
ret = -EACCES;
goto out;
}
if (in_buf_len < sizeof(struct file_zero_data_information)) {
ret = -EINVAL;
goto out;
}
zero_data =
(struct file_zero_data_information *)&req->Buffer[0];
off = le64_to_cpu(zero_data->FileOffset);
bfz = le64_to_cpu(zero_data->BeyondFinalZero);
if (off < 0 || bfz < 0 || off > bfz) {
ret = -EINVAL;
goto out;
}
len = bfz - off;
if (len) {
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp) {
ret = -ENOENT;
goto out;
}
ret = ksmbd_vfs_zero_data(work, fp, off, len);
ksmbd_fd_put(work, fp);
if (ret < 0)
goto out;
}
break;
}
case FSCTL_QUERY_ALLOCATED_RANGES:
if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
ret = -EINVAL;
goto out;
}
ret = fsctl_query_allocated_ranges(work, id,
(struct file_allocated_range_buffer *)&req->Buffer[0],
(struct file_allocated_range_buffer *)&rsp->Buffer[0],
out_buf_len /
sizeof(struct file_allocated_range_buffer), &nbytes);
if (ret == -E2BIG) {
rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
} else if (ret < 0) {
nbytes = 0;
goto out;
}
nbytes *= sizeof(struct file_allocated_range_buffer);
break;
case FSCTL_GET_REPARSE_POINT:
{
struct reparse_data_buffer *reparse_ptr;
struct ksmbd_file *fp;
reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
fp = ksmbd_lookup_fd_fast(work, id);
if (!fp) {
pr_err("not found fp!!\n");
ret = -ENOENT;
goto out;
}
reparse_ptr->ReparseTag =
smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
reparse_ptr->ReparseDataLength = 0;
ksmbd_fd_put(work, fp);
nbytes = sizeof(struct reparse_data_buffer);
break;
}
case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
{
struct ksmbd_file *fp_in, *fp_out = NULL;
struct duplicate_extents_to_file *dup_ext;
loff_t src_off, dst_off, length, cloned;
if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
ret = -EINVAL;
goto out;
}
dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
dup_ext->PersistentFileHandle);
if (!fp_in) {
pr_err("not found file handle in duplicate extent to file\n");
ret = -ENOENT;
goto out;
}
fp_out = ksmbd_lookup_fd_fast(work, id);
if (!fp_out) {
pr_err("not found fp\n");
ret = -ENOENT;
goto dup_ext_out;
}
src_off = le64_to_cpu(dup_ext->SourceFileOffset);
dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
length = le64_to_cpu(dup_ext->ByteCount);
/*
* XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
* should fall back to vfs_copy_file_range(). This could be
* beneficial when re-exporting nfs/smb mount, but note that
* this can result in partial copy that returns an error status.
* If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
* fall back to vfs_copy_file_range(), should be avoided when
* the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
*/
cloned = vfs_clone_file_range(fp_in->filp, src_off,
fp_out->filp, dst_off, length, 0);
if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
ret = -EOPNOTSUPP;
goto dup_ext_out;
} else if (cloned != length) {
cloned = vfs_copy_file_range(fp_in->filp, src_off,
fp_out->filp, dst_off,
length, 0);
if (cloned != length) {
if (cloned < 0)
ret = cloned;
else
ret = -EINVAL;
}
}
dup_ext_out:
ksmbd_fd_put(work, fp_in);
ksmbd_fd_put(work, fp_out);
if (ret < 0)
goto out;
break;
}
default:
ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
cnt_code);
ret = -EOPNOTSUPP;
goto out;
}
rsp->CtlCode = cpu_to_le32(cnt_code);
rsp->InputCount = cpu_to_le32(0);
rsp->InputOffset = cpu_to_le32(112);
rsp->OutputOffset = cpu_to_le32(112);
rsp->OutputCount = cpu_to_le32(nbytes);
rsp->StructureSize = cpu_to_le16(49);
rsp->Reserved = cpu_to_le16(0);
rsp->Flags = cpu_to_le32(0);
rsp->Reserved2 = cpu_to_le32(0);
inc_rfc1001_len(work->response_buf, 48 + nbytes);
return 0;
out:
if (ret == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;
else if (ret == -ENOENT)
rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
else if (ret == -EOPNOTSUPP)
rsp->hdr.Status = STATUS_NOT_SUPPORTED;
else if (ret == -ENOSPC)
rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
else if (ret < 0 || rsp->hdr.Status == 0)
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
return 0;
}
/**
* smb20_oplock_break_ack() - handler for smb2.0 oplock break command
* @work: smb work containing oplock break command buffer
*
* Return: 0
*/
static void smb20_oplock_break_ack(struct ksmbd_work *work)
{
struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
struct ksmbd_file *fp;
struct oplock_info *opinfo = NULL;
__le32 err = 0;
int ret = 0;
u64 volatile_id, persistent_id;
char req_oplevel = 0, rsp_oplevel = 0;
unsigned int oplock_change_type;
volatile_id = req->VolatileFid;
persistent_id = req->PersistentFid;
req_oplevel = req->OplockLevel;
ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
volatile_id, persistent_id, req_oplevel);
fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
if (!fp) {
rsp->hdr.Status = STATUS_FILE_CLOSED;
smb2_set_err_rsp(work);
return;
}
opinfo = opinfo_get(fp);
if (!opinfo) {
pr_err("unexpected null oplock_info\n");
rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
smb2_set_err_rsp(work);
ksmbd_fd_put(work, fp);
return;
}
if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
goto err_out;
}
if (opinfo->op_state == OPLOCK_STATE_NONE) {
ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
goto err_out;
}
if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
(req_oplevel != SMB2_OPLOCK_LEVEL_II &&
req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
oplock_change_type = OPLOCK_WRITE_TO_NONE;
} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
oplock_change_type = OPLOCK_READ_TO_NONE;
} else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
err = STATUS_INVALID_DEVICE_STATE;
if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
req_oplevel == SMB2_OPLOCK_LEVEL_II) {
oplock_change_type = OPLOCK_WRITE_TO_READ;
} else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
oplock_change_type = OPLOCK_WRITE_TO_NONE;
} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
oplock_change_type = OPLOCK_READ_TO_NONE;
} else {
oplock_change_type = 0;
}
} else {
oplock_change_type = 0;
}
switch (oplock_change_type) {
case OPLOCK_WRITE_TO_READ:
ret = opinfo_write_to_read(opinfo);
rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
break;
case OPLOCK_WRITE_TO_NONE:
ret = opinfo_write_to_none(opinfo);
rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
break;
case OPLOCK_READ_TO_NONE:
ret = opinfo_read_to_none(opinfo);
rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
break;
default:
pr_err("unknown oplock change 0x%x -> 0x%x\n",
opinfo->level, rsp_oplevel);
}
if (ret < 0) {
rsp->hdr.Status = err;
goto err_out;
}
opinfo_put(opinfo);
ksmbd_fd_put(work, fp);
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
rsp->StructureSize = cpu_to_le16(24);
rsp->OplockLevel = rsp_oplevel;
rsp->Reserved = 0;
rsp->Reserved2 = 0;
rsp->VolatileFid = volatile_id;
rsp->PersistentFid = persistent_id;
inc_rfc1001_len(work->response_buf, 24);
return;
err_out:
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
opinfo_put(opinfo);
ksmbd_fd_put(work, fp);
smb2_set_err_rsp(work);
}
static int check_lease_state(struct lease *lease, __le32 req_state)
{
if ((lease->new_state ==
(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
!(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
lease->new_state = req_state;
return 0;
}
if (lease->new_state == req_state)
return 0;
return 1;
}
/**
* smb21_lease_break_ack() - handler for smb2.1 lease break command
* @work: smb work containing lease break command buffer
*
* Return: 0
*/
static void smb21_lease_break_ack(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
struct oplock_info *opinfo;
__le32 err = 0;
int ret = 0;
unsigned int lease_change_type;
__le32 lease_state;
struct lease *lease;
ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
le32_to_cpu(req->LeaseState));
opinfo = lookup_lease_in_table(conn, req->LeaseKey);
if (!opinfo) {
ksmbd_debug(OPLOCK, "file not opened\n");
smb2_set_err_rsp(work);
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
return;
}
lease = opinfo->o_lease;
if (opinfo->op_state == OPLOCK_STATE_NONE) {
pr_err("unexpected lease break state 0x%x\n",
opinfo->op_state);
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
goto err_out;
}
if (check_lease_state(lease, req->LeaseState)) {
rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
ksmbd_debug(OPLOCK,
"req lease state: 0x%x, expected state: 0x%x\n",
req->LeaseState, lease->new_state);
goto err_out;
}
if (!atomic_read(&opinfo->breaking_cnt)) {
rsp->hdr.Status = STATUS_UNSUCCESSFUL;
goto err_out;
}
/* check for bad lease state */
if (req->LeaseState &
(~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
lease_change_type = OPLOCK_WRITE_TO_NONE;
else
lease_change_type = OPLOCK_READ_TO_NONE;
ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
le32_to_cpu(lease->state),
le32_to_cpu(req->LeaseState));
} else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
req->LeaseState != SMB2_LEASE_NONE_LE) {
err = STATUS_INVALID_OPLOCK_PROTOCOL;
lease_change_type = OPLOCK_READ_TO_NONE;
ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
le32_to_cpu(lease->state),
le32_to_cpu(req->LeaseState));
} else {
/* valid lease state changes */
err = STATUS_INVALID_DEVICE_STATE;
if (req->LeaseState == SMB2_LEASE_NONE_LE) {
if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
lease_change_type = OPLOCK_WRITE_TO_NONE;
else
lease_change_type = OPLOCK_READ_TO_NONE;
} else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
lease_change_type = OPLOCK_WRITE_TO_READ;
else
lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
} else {
lease_change_type = 0;
}
}
switch (lease_change_type) {
case OPLOCK_WRITE_TO_READ:
ret = opinfo_write_to_read(opinfo);
break;
case OPLOCK_READ_HANDLE_TO_READ:
ret = opinfo_read_handle_to_read(opinfo);
break;
case OPLOCK_WRITE_TO_NONE:
ret = opinfo_write_to_none(opinfo);
break;
case OPLOCK_READ_TO_NONE:
ret = opinfo_read_to_none(opinfo);
break;
default:
ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
le32_to_cpu(lease->state),
le32_to_cpu(req->LeaseState));
}
lease_state = lease->state;
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
atomic_dec(&opinfo->breaking_cnt);
wake_up_interruptible_all(&opinfo->oplock_brk);
opinfo_put(opinfo);
if (ret < 0) {
rsp->hdr.Status = err;
goto err_out;
}
rsp->StructureSize = cpu_to_le16(36);
rsp->Reserved = 0;
rsp->Flags = 0;
memcpy(rsp->LeaseKey, req->LeaseKey, 16);
rsp->LeaseState = lease_state;
rsp->LeaseDuration = 0;
inc_rfc1001_len(work->response_buf, 36);
return;
err_out:
opinfo->op_state = OPLOCK_STATE_NONE;
wake_up_interruptible_all(&opinfo->oplock_q);
atomic_dec(&opinfo->breaking_cnt);
wake_up_interruptible_all(&opinfo->oplock_brk);
opinfo_put(opinfo);
smb2_set_err_rsp(work);
}
/**
* smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
* @work: smb work containing oplock/lease break command buffer
*
* Return: 0
*/
int smb2_oplock_break(struct ksmbd_work *work)
{
struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
switch (le16_to_cpu(req->StructureSize)) {
case OP_BREAK_STRUCT_SIZE_20:
smb20_oplock_break_ack(work);
break;
case OP_BREAK_STRUCT_SIZE_21:
smb21_lease_break_ack(work);
break;
default:
ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
le16_to_cpu(req->StructureSize));
rsp->hdr.Status = STATUS_INVALID_PARAMETER;
smb2_set_err_rsp(work);
}
return 0;
}
/**
* smb2_notify() - handler for smb2 notify request
* @work: smb work containing notify command buffer
*
* Return: 0
*/
int smb2_notify(struct ksmbd_work *work)
{
struct smb2_change_notify_req *req;
struct smb2_change_notify_rsp *rsp;
WORK_BUFFERS(work, req, rsp);
if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
rsp->hdr.Status = STATUS_INTERNAL_ERROR;
smb2_set_err_rsp(work);
return 0;
}
smb2_set_err_rsp(work);
rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
return 0;
}
/**
* smb2_is_sign_req() - handler for checking packet signing status
* @work: smb work containing notify command buffer
* @command: SMB2 command id
*
* Return: true if packed is signed, false otherwise
*/
bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
{
struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
command != SMB2_NEGOTIATE_HE &&
command != SMB2_SESSION_SETUP_HE &&
command != SMB2_OPLOCK_BREAK_HE)
return true;
return false;
}
/**
* smb2_check_sign_req() - handler for req packet sign processing
* @work: smb work containing notify command buffer
*
* Return: 1 on success, 0 otherwise
*/
int smb2_check_sign_req(struct ksmbd_work *work)
{
struct smb2_hdr *hdr;
char signature_req[SMB2_SIGNATURE_SIZE];
char signature[SMB2_HMACSHA256_SIZE];
struct kvec iov[1];
size_t len;
hdr = smb2_get_msg(work->request_buf);
if (work->next_smb2_rcv_hdr_off)
hdr = ksmbd_req_buf_next(work);
if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
len = get_rfc1002_len(work->request_buf);
else if (hdr->NextCommand)
len = le32_to_cpu(hdr->NextCommand);
else
len = get_rfc1002_len(work->request_buf) -
work->next_smb2_rcv_hdr_off;
memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
signature))
return 0;
if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
pr_err("bad smb2 signature\n");
return 0;
}
return 1;
}
/**
* smb2_set_sign_rsp() - handler for rsp packet sign processing
* @work: smb work containing notify command buffer
*
*/
void smb2_set_sign_rsp(struct ksmbd_work *work)
{
struct smb2_hdr *hdr;
struct smb2_hdr *req_hdr;
char signature[SMB2_HMACSHA256_SIZE];
struct kvec iov[2];
size_t len;
int n_vec = 1;
hdr = smb2_get_msg(work->response_buf);
if (work->next_smb2_rsp_hdr_off)
hdr = ksmbd_resp_buf_next(work);
req_hdr = ksmbd_req_buf_next(work);
if (!work->next_smb2_rsp_hdr_off) {
len = get_rfc1002_len(work->response_buf);
if (req_hdr->NextCommand)
len = ALIGN(len, 8);
} else {
len = get_rfc1002_len(work->response_buf) -
work->next_smb2_rsp_hdr_off;
len = ALIGN(len, 8);
}
if (req_hdr->NextCommand)
hdr->NextCommand = cpu_to_le32(len);
hdr->Flags |= SMB2_FLAGS_SIGNED;
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (work->aux_payload_sz) {
iov[0].iov_len -= work->aux_payload_sz;
iov[1].iov_base = work->aux_payload_buf;
iov[1].iov_len = work->aux_payload_sz;
n_vec++;
}
if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
signature))
memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
}
/**
* smb3_check_sign_req() - handler for req packet sign processing
* @work: smb work containing notify command buffer
*
* Return: 1 on success, 0 otherwise
*/
int smb3_check_sign_req(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
char *signing_key;
struct smb2_hdr *hdr;
struct channel *chann;
char signature_req[SMB2_SIGNATURE_SIZE];
char signature[SMB2_CMACAES_SIZE];
struct kvec iov[1];
size_t len;
hdr = smb2_get_msg(work->request_buf);
if (work->next_smb2_rcv_hdr_off)
hdr = ksmbd_req_buf_next(work);
if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
len = get_rfc1002_len(work->request_buf);
else if (hdr->NextCommand)
len = le32_to_cpu(hdr->NextCommand);
else
len = get_rfc1002_len(work->request_buf) -
work->next_smb2_rcv_hdr_off;
if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
signing_key = work->sess->smb3signingkey;
} else {
chann = lookup_chann_list(work->sess, conn);
if (!chann) {
return 0;
}
signing_key = chann->smb3signingkey;
}
if (!signing_key) {
pr_err("SMB3 signing key is not generated\n");
return 0;
}
memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
return 0;
if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
pr_err("bad smb2 signature\n");
return 0;
}
return 1;
}
/**
* smb3_set_sign_rsp() - handler for rsp packet sign processing
* @work: smb work containing notify command buffer
*
*/
void smb3_set_sign_rsp(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct smb2_hdr *req_hdr, *hdr;
struct channel *chann;
char signature[SMB2_CMACAES_SIZE];
struct kvec iov[2];
int n_vec = 1;
size_t len;
char *signing_key;
hdr = smb2_get_msg(work->response_buf);
if (work->next_smb2_rsp_hdr_off)
hdr = ksmbd_resp_buf_next(work);
req_hdr = ksmbd_req_buf_next(work);
if (!work->next_smb2_rsp_hdr_off) {
len = get_rfc1002_len(work->response_buf);
if (req_hdr->NextCommand)
len = ALIGN(len, 8);
} else {
len = get_rfc1002_len(work->response_buf) -
work->next_smb2_rsp_hdr_off;
len = ALIGN(len, 8);
}
if (conn->binding == false &&
le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
signing_key = work->sess->smb3signingkey;
} else {
chann = lookup_chann_list(work->sess, work->conn);
if (!chann) {
return;
}
signing_key = chann->smb3signingkey;
}
if (!signing_key)
return;
if (req_hdr->NextCommand)
hdr->NextCommand = cpu_to_le32(len);
hdr->Flags |= SMB2_FLAGS_SIGNED;
memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
iov[0].iov_base = (char *)&hdr->ProtocolId;
iov[0].iov_len = len;
if (work->aux_payload_sz) {
iov[0].iov_len -= work->aux_payload_sz;
iov[1].iov_base = work->aux_payload_buf;
iov[1].iov_len = work->aux_payload_sz;
n_vec++;
}
if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
}
/**
* smb3_preauth_hash_rsp() - handler for computing preauth hash on response
* @work: smb work containing response buffer
*
*/
void smb3_preauth_hash_rsp(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct smb2_hdr *req, *rsp;
if (conn->dialect != SMB311_PROT_ID)
return;
WORK_BUFFERS(work, req, rsp);
if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
conn->preauth_info)
ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
conn->preauth_info->Preauth_HashValue);
if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
__u8 *hash_value;
if (conn->binding) {
struct preauth_session *preauth_sess;
preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
if (!preauth_sess)
return;
hash_value = preauth_sess->Preauth_HashValue;
} else {
hash_value = sess->Preauth_HashValue;
if (!hash_value)
return;
}
ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
hash_value);
}
}
static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
{
struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
struct smb2_hdr *hdr = smb2_get_msg(old_buf);
unsigned int orig_len = get_rfc1002_len(old_buf);
/* tr_buf must be cleared by the caller */
tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
cipher_type == SMB2_ENCRYPTION_AES256_GCM)
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
else
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
inc_rfc1001_len(tr_buf, orig_len);
}
int smb3_encrypt_resp(struct ksmbd_work *work)
{
char *buf = work->response_buf;
struct kvec iov[3];
int rc = -ENOMEM;
int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
if (ARRAY_SIZE(iov) < rq_nvec)
return -ENOMEM;
work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
if (!work->tr_buf)
return rc;
/* fill transform header */
fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
iov[0].iov_base = work->tr_buf;
iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
buf_size += iov[0].iov_len - 4;
iov[1].iov_base = buf + 4;
iov[1].iov_len = get_rfc1002_len(buf);
if (work->aux_payload_sz) {
iov[1].iov_len = work->resp_hdr_sz - 4;
iov[2].iov_base = work->aux_payload_buf;
iov[2].iov_len = work->aux_payload_sz;
buf_size += iov[2].iov_len;
}
buf_size += iov[1].iov_len;
work->resp_hdr_sz = iov[1].iov_len;
rc = ksmbd_crypt_message(work, iov, rq_nvec, 1);
if (rc)
return rc;
memmove(buf, iov[1].iov_base, iov[1].iov_len);
*(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
return rc;
}
bool smb3_is_transform_hdr(void *buf)
{
struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
}
int smb3_decrypt_req(struct ksmbd_work *work)
{
struct ksmbd_session *sess;
char *buf = work->request_buf;
unsigned int pdu_length = get_rfc1002_len(buf);
struct kvec iov[2];
int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
int rc = 0;
if (buf_data_size < sizeof(struct smb2_hdr)) {
pr_err("Transform message is too small (%u)\n",
pdu_length);
return -ECONNABORTED;
}
if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
pr_err("Transform message is broken\n");
return -ECONNABORTED;
}
sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
if (!sess) {
pr_err("invalid session id(%llx) in transform header\n",
le64_to_cpu(tr_hdr->SessionId));
return -ECONNABORTED;
}
iov[0].iov_base = buf;
iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
iov[1].iov_len = buf_data_size;
rc = ksmbd_crypt_message(work, iov, 2, 0);
if (rc)
return rc;
memmove(buf + 4, iov[1].iov_base, buf_data_size);
*(__be32 *)buf = cpu_to_be32(buf_data_size);
return rc;
}
bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
if (conn->dialect < SMB30_PROT_ID)
return false;
if (work->next_smb2_rcv_hdr_off)
rsp = ksmbd_resp_buf_next(work);
if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
sess->user && !user_guest(sess->user) &&
rsp->Status == STATUS_SUCCESS)
return true;
return false;
}
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