1020 lines
31 KiB
C
1020 lines
31 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _RDS_RDS_H
|
|
#define _RDS_RDS_H
|
|
|
|
#include <net/sock.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/highmem.h>
|
|
#include <rdma/rdma_cm.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/rds.h>
|
|
#include <linux/rhashtable.h>
|
|
#include <linux/refcount.h>
|
|
#include <linux/in6.h>
|
|
|
|
#include "info.h"
|
|
|
|
/*
|
|
* RDS Network protocol version
|
|
*/
|
|
#define RDS_PROTOCOL_3_0 0x0300
|
|
#define RDS_PROTOCOL_3_1 0x0301
|
|
#define RDS_PROTOCOL_4_0 0x0400
|
|
#define RDS_PROTOCOL_4_1 0x0401
|
|
#define RDS_PROTOCOL_VERSION RDS_PROTOCOL_3_1
|
|
#define RDS_PROTOCOL_MAJOR(v) ((v) >> 8)
|
|
#define RDS_PROTOCOL_MINOR(v) ((v) & 255)
|
|
#define RDS_PROTOCOL(maj, min) (((maj) << 8) | min)
|
|
#define RDS_PROTOCOL_COMPAT_VERSION RDS_PROTOCOL_3_1
|
|
|
|
/* The following ports, 16385, 18634, 18635, are registered with IANA as
|
|
* the ports to be used for RDS over TCP and UDP. Currently, only RDS over
|
|
* TCP and RDS over IB/RDMA are implemented. 18634 is the historical value
|
|
* used for the RDMA_CM listener port. RDS/TCP uses port 16385. After
|
|
* IPv6 work, RDMA_CM also uses 16385 as the listener port. 18634 is kept
|
|
* to ensure compatibility with older RDS modules. Those ports are defined
|
|
* in each transport's header file.
|
|
*/
|
|
#define RDS_PORT 18634
|
|
|
|
#ifdef ATOMIC64_INIT
|
|
#define KERNEL_HAS_ATOMIC64
|
|
#endif
|
|
#ifdef RDS_DEBUG
|
|
#define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args)
|
|
#else
|
|
/* sigh, pr_debug() causes unused variable warnings */
|
|
static inline __printf(1, 2)
|
|
void rdsdebug(char *fmt, ...)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#define RDS_FRAG_SHIFT 12
|
|
#define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT))
|
|
|
|
/* Used to limit both RDMA and non-RDMA RDS message to 1MB */
|
|
#define RDS_MAX_MSG_SIZE ((unsigned int)(1 << 20))
|
|
|
|
#define RDS_CONG_MAP_BYTES (65536 / 8)
|
|
#define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE)
|
|
#define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8)
|
|
|
|
struct rds_cong_map {
|
|
struct rb_node m_rb_node;
|
|
struct in6_addr m_addr;
|
|
wait_queue_head_t m_waitq;
|
|
struct list_head m_conn_list;
|
|
unsigned long m_page_addrs[RDS_CONG_MAP_PAGES];
|
|
};
|
|
|
|
|
|
/*
|
|
* This is how we will track the connection state:
|
|
* A connection is always in one of the following
|
|
* states. Updates to the state are atomic and imply
|
|
* a memory barrier.
|
|
*/
|
|
enum {
|
|
RDS_CONN_DOWN = 0,
|
|
RDS_CONN_CONNECTING,
|
|
RDS_CONN_DISCONNECTING,
|
|
RDS_CONN_UP,
|
|
RDS_CONN_RESETTING,
|
|
RDS_CONN_ERROR,
|
|
};
|
|
|
|
/* Bits for c_flags */
|
|
#define RDS_LL_SEND_FULL 0
|
|
#define RDS_RECONNECT_PENDING 1
|
|
#define RDS_IN_XMIT 2
|
|
#define RDS_RECV_REFILL 3
|
|
#define RDS_DESTROY_PENDING 4
|
|
|
|
/* Max number of multipaths per RDS connection. Must be a power of 2 */
|
|
#define RDS_MPATH_WORKERS 8
|
|
#define RDS_MPATH_HASH(rs, n) (jhash_1word((rs)->rs_bound_port, \
|
|
(rs)->rs_hash_initval) & ((n) - 1))
|
|
|
|
#define IS_CANONICAL(laddr, faddr) (htonl(laddr) < htonl(faddr))
|
|
|
|
/* Per mpath connection state */
|
|
struct rds_conn_path {
|
|
struct rds_connection *cp_conn;
|
|
struct rds_message *cp_xmit_rm;
|
|
unsigned long cp_xmit_sg;
|
|
unsigned int cp_xmit_hdr_off;
|
|
unsigned int cp_xmit_data_off;
|
|
unsigned int cp_xmit_atomic_sent;
|
|
unsigned int cp_xmit_rdma_sent;
|
|
unsigned int cp_xmit_data_sent;
|
|
|
|
spinlock_t cp_lock; /* protect msg queues */
|
|
u64 cp_next_tx_seq;
|
|
struct list_head cp_send_queue;
|
|
struct list_head cp_retrans;
|
|
|
|
u64 cp_next_rx_seq;
|
|
|
|
void *cp_transport_data;
|
|
|
|
atomic_t cp_state;
|
|
unsigned long cp_send_gen;
|
|
unsigned long cp_flags;
|
|
unsigned long cp_reconnect_jiffies;
|
|
struct delayed_work cp_send_w;
|
|
struct delayed_work cp_recv_w;
|
|
struct delayed_work cp_conn_w;
|
|
struct work_struct cp_down_w;
|
|
struct mutex cp_cm_lock; /* protect cp_state & cm */
|
|
wait_queue_head_t cp_waitq;
|
|
|
|
unsigned int cp_unacked_packets;
|
|
unsigned int cp_unacked_bytes;
|
|
unsigned int cp_index;
|
|
};
|
|
|
|
/* One rds_connection per RDS address pair */
|
|
struct rds_connection {
|
|
struct hlist_node c_hash_node;
|
|
struct in6_addr c_laddr;
|
|
struct in6_addr c_faddr;
|
|
int c_dev_if; /* ifindex used for this conn */
|
|
int c_bound_if; /* ifindex of c_laddr */
|
|
unsigned int c_loopback:1,
|
|
c_isv6:1,
|
|
c_ping_triggered:1,
|
|
c_pad_to_32:29;
|
|
int c_npaths;
|
|
struct rds_connection *c_passive;
|
|
struct rds_transport *c_trans;
|
|
|
|
struct rds_cong_map *c_lcong;
|
|
struct rds_cong_map *c_fcong;
|
|
|
|
/* Protocol version */
|
|
unsigned int c_proposed_version;
|
|
unsigned int c_version;
|
|
possible_net_t c_net;
|
|
|
|
/* TOS */
|
|
u8 c_tos;
|
|
|
|
struct list_head c_map_item;
|
|
unsigned long c_map_queued;
|
|
|
|
struct rds_conn_path *c_path;
|
|
wait_queue_head_t c_hs_waitq; /* handshake waitq */
|
|
|
|
u32 c_my_gen_num;
|
|
u32 c_peer_gen_num;
|
|
};
|
|
|
|
static inline
|
|
struct net *rds_conn_net(struct rds_connection *conn)
|
|
{
|
|
return read_pnet(&conn->c_net);
|
|
}
|
|
|
|
static inline
|
|
void rds_conn_net_set(struct rds_connection *conn, struct net *net)
|
|
{
|
|
write_pnet(&conn->c_net, net);
|
|
}
|
|
|
|
#define RDS_FLAG_CONG_BITMAP 0x01
|
|
#define RDS_FLAG_ACK_REQUIRED 0x02
|
|
#define RDS_FLAG_RETRANSMITTED 0x04
|
|
#define RDS_MAX_ADV_CREDIT 255
|
|
|
|
/* RDS_FLAG_PROBE_PORT is the reserved sport used for sending a ping
|
|
* probe to exchange control information before establishing a connection.
|
|
* Currently the control information that is exchanged is the number of
|
|
* supported paths. If the peer is a legacy (older kernel revision) peer,
|
|
* it would return a pong message without additional control information
|
|
* that would then alert the sender that the peer was an older rev.
|
|
*/
|
|
#define RDS_FLAG_PROBE_PORT 1
|
|
#define RDS_HS_PROBE(sport, dport) \
|
|
((sport == RDS_FLAG_PROBE_PORT && dport == 0) || \
|
|
(sport == 0 && dport == RDS_FLAG_PROBE_PORT))
|
|
/*
|
|
* Maximum space available for extension headers.
|
|
*/
|
|
#define RDS_HEADER_EXT_SPACE 16
|
|
|
|
struct rds_header {
|
|
__be64 h_sequence;
|
|
__be64 h_ack;
|
|
__be32 h_len;
|
|
__be16 h_sport;
|
|
__be16 h_dport;
|
|
u8 h_flags;
|
|
u8 h_credit;
|
|
u8 h_padding[4];
|
|
__sum16 h_csum;
|
|
|
|
u8 h_exthdr[RDS_HEADER_EXT_SPACE];
|
|
};
|
|
|
|
/*
|
|
* Reserved - indicates end of extensions
|
|
*/
|
|
#define RDS_EXTHDR_NONE 0
|
|
|
|
/*
|
|
* This extension header is included in the very
|
|
* first message that is sent on a new connection,
|
|
* and identifies the protocol level. This will help
|
|
* rolling updates if a future change requires breaking
|
|
* the protocol.
|
|
* NB: This is no longer true for IB, where we do a version
|
|
* negotiation during the connection setup phase (protocol
|
|
* version information is included in the RDMA CM private data).
|
|
*/
|
|
#define RDS_EXTHDR_VERSION 1
|
|
struct rds_ext_header_version {
|
|
__be32 h_version;
|
|
};
|
|
|
|
/*
|
|
* This extension header is included in the RDS message
|
|
* chasing an RDMA operation.
|
|
*/
|
|
#define RDS_EXTHDR_RDMA 2
|
|
struct rds_ext_header_rdma {
|
|
__be32 h_rdma_rkey;
|
|
};
|
|
|
|
/*
|
|
* This extension header tells the peer about the
|
|
* destination <R_Key,offset> of the requested RDMA
|
|
* operation.
|
|
*/
|
|
#define RDS_EXTHDR_RDMA_DEST 3
|
|
struct rds_ext_header_rdma_dest {
|
|
__be32 h_rdma_rkey;
|
|
__be32 h_rdma_offset;
|
|
};
|
|
|
|
/* Extension header announcing number of paths.
|
|
* Implicit length = 2 bytes.
|
|
*/
|
|
#define RDS_EXTHDR_NPATHS 5
|
|
#define RDS_EXTHDR_GEN_NUM 6
|
|
|
|
#define __RDS_EXTHDR_MAX 16 /* for now */
|
|
#define RDS_RX_MAX_TRACES (RDS_MSG_RX_DGRAM_TRACE_MAX + 1)
|
|
#define RDS_MSG_RX_HDR 0
|
|
#define RDS_MSG_RX_START 1
|
|
#define RDS_MSG_RX_END 2
|
|
#define RDS_MSG_RX_CMSG 3
|
|
|
|
/* The following values are whitelisted for usercopy */
|
|
struct rds_inc_usercopy {
|
|
rds_rdma_cookie_t rdma_cookie;
|
|
ktime_t rx_tstamp;
|
|
};
|
|
|
|
struct rds_incoming {
|
|
refcount_t i_refcount;
|
|
struct list_head i_item;
|
|
struct rds_connection *i_conn;
|
|
struct rds_conn_path *i_conn_path;
|
|
struct rds_header i_hdr;
|
|
unsigned long i_rx_jiffies;
|
|
struct in6_addr i_saddr;
|
|
|
|
struct rds_inc_usercopy i_usercopy;
|
|
u64 i_rx_lat_trace[RDS_RX_MAX_TRACES];
|
|
};
|
|
|
|
struct rds_mr {
|
|
struct rb_node r_rb_node;
|
|
struct kref r_kref;
|
|
u32 r_key;
|
|
|
|
/* A copy of the creation flags */
|
|
unsigned int r_use_once:1;
|
|
unsigned int r_invalidate:1;
|
|
unsigned int r_write:1;
|
|
|
|
struct rds_sock *r_sock; /* back pointer to the socket that owns us */
|
|
struct rds_transport *r_trans;
|
|
void *r_trans_private;
|
|
};
|
|
|
|
static inline rds_rdma_cookie_t rds_rdma_make_cookie(u32 r_key, u32 offset)
|
|
{
|
|
return r_key | (((u64) offset) << 32);
|
|
}
|
|
|
|
static inline u32 rds_rdma_cookie_key(rds_rdma_cookie_t cookie)
|
|
{
|
|
return cookie;
|
|
}
|
|
|
|
static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie)
|
|
{
|
|
return cookie >> 32;
|
|
}
|
|
|
|
/* atomic operation types */
|
|
#define RDS_ATOMIC_TYPE_CSWP 0
|
|
#define RDS_ATOMIC_TYPE_FADD 1
|
|
|
|
/*
|
|
* m_sock_item and m_conn_item are on lists that are serialized under
|
|
* conn->c_lock. m_sock_item has additional meaning in that once it is empty
|
|
* the message will not be put back on the retransmit list after being sent.
|
|
* messages that are canceled while being sent rely on this.
|
|
*
|
|
* m_inc is used by loopback so that it can pass an incoming message straight
|
|
* back up into the rx path. It embeds a wire header which is also used by
|
|
* the send path, which is kind of awkward.
|
|
*
|
|
* m_sock_item indicates the message's presence on a socket's send or receive
|
|
* queue. m_rs will point to that socket.
|
|
*
|
|
* m_daddr is used by cancellation to prune messages to a given destination.
|
|
*
|
|
* The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock
|
|
* nesting. As paths iterate over messages on a sock, or conn, they must
|
|
* also lock the conn, or sock, to remove the message from those lists too.
|
|
* Testing the flag to determine if the message is still on the lists lets
|
|
* us avoid testing the list_head directly. That means each path can use
|
|
* the message's list_head to keep it on a local list while juggling locks
|
|
* without confusing the other path.
|
|
*
|
|
* m_ack_seq is an optional field set by transports who need a different
|
|
* sequence number range to invalidate. They can use this in a callback
|
|
* that they pass to rds_send_drop_acked() to see if each message has been
|
|
* acked. The HAS_ACK_SEQ flag can be used to detect messages which haven't
|
|
* had ack_seq set yet.
|
|
*/
|
|
#define RDS_MSG_ON_SOCK 1
|
|
#define RDS_MSG_ON_CONN 2
|
|
#define RDS_MSG_HAS_ACK_SEQ 3
|
|
#define RDS_MSG_ACK_REQUIRED 4
|
|
#define RDS_MSG_RETRANSMITTED 5
|
|
#define RDS_MSG_MAPPED 6
|
|
#define RDS_MSG_PAGEVEC 7
|
|
#define RDS_MSG_FLUSH 8
|
|
|
|
struct rds_znotifier {
|
|
struct mmpin z_mmp;
|
|
u32 z_cookie;
|
|
};
|
|
|
|
struct rds_msg_zcopy_info {
|
|
struct list_head rs_zcookie_next;
|
|
union {
|
|
struct rds_znotifier znotif;
|
|
struct rds_zcopy_cookies zcookies;
|
|
};
|
|
};
|
|
|
|
struct rds_msg_zcopy_queue {
|
|
struct list_head zcookie_head;
|
|
spinlock_t lock; /* protects zcookie_head queue */
|
|
};
|
|
|
|
static inline void rds_message_zcopy_queue_init(struct rds_msg_zcopy_queue *q)
|
|
{
|
|
spin_lock_init(&q->lock);
|
|
INIT_LIST_HEAD(&q->zcookie_head);
|
|
}
|
|
|
|
struct rds_iov_vector {
|
|
struct rds_iovec *iov;
|
|
int len;
|
|
};
|
|
|
|
struct rds_iov_vector_arr {
|
|
struct rds_iov_vector *vec;
|
|
int len;
|
|
int indx;
|
|
int incr;
|
|
};
|
|
|
|
struct rds_message {
|
|
refcount_t m_refcount;
|
|
struct list_head m_sock_item;
|
|
struct list_head m_conn_item;
|
|
struct rds_incoming m_inc;
|
|
u64 m_ack_seq;
|
|
struct in6_addr m_daddr;
|
|
unsigned long m_flags;
|
|
|
|
/* Never access m_rs without holding m_rs_lock.
|
|
* Lock nesting is
|
|
* rm->m_rs_lock
|
|
* -> rs->rs_lock
|
|
*/
|
|
spinlock_t m_rs_lock;
|
|
wait_queue_head_t m_flush_wait;
|
|
|
|
struct rds_sock *m_rs;
|
|
|
|
/* cookie to send to remote, in rds header */
|
|
rds_rdma_cookie_t m_rdma_cookie;
|
|
|
|
unsigned int m_used_sgs;
|
|
unsigned int m_total_sgs;
|
|
|
|
void *m_final_op;
|
|
|
|
struct {
|
|
struct rm_atomic_op {
|
|
int op_type;
|
|
union {
|
|
struct {
|
|
uint64_t compare;
|
|
uint64_t swap;
|
|
uint64_t compare_mask;
|
|
uint64_t swap_mask;
|
|
} op_m_cswp;
|
|
struct {
|
|
uint64_t add;
|
|
uint64_t nocarry_mask;
|
|
} op_m_fadd;
|
|
};
|
|
|
|
u32 op_rkey;
|
|
u64 op_remote_addr;
|
|
unsigned int op_notify:1;
|
|
unsigned int op_recverr:1;
|
|
unsigned int op_mapped:1;
|
|
unsigned int op_silent:1;
|
|
unsigned int op_active:1;
|
|
struct scatterlist *op_sg;
|
|
struct rds_notifier *op_notifier;
|
|
|
|
struct rds_mr *op_rdma_mr;
|
|
} atomic;
|
|
struct rm_rdma_op {
|
|
u32 op_rkey;
|
|
u64 op_remote_addr;
|
|
unsigned int op_write:1;
|
|
unsigned int op_fence:1;
|
|
unsigned int op_notify:1;
|
|
unsigned int op_recverr:1;
|
|
unsigned int op_mapped:1;
|
|
unsigned int op_silent:1;
|
|
unsigned int op_active:1;
|
|
unsigned int op_bytes;
|
|
unsigned int op_nents;
|
|
unsigned int op_count;
|
|
struct scatterlist *op_sg;
|
|
struct rds_notifier *op_notifier;
|
|
|
|
struct rds_mr *op_rdma_mr;
|
|
|
|
u64 op_odp_addr;
|
|
struct rds_mr *op_odp_mr;
|
|
} rdma;
|
|
struct rm_data_op {
|
|
unsigned int op_active:1;
|
|
unsigned int op_nents;
|
|
unsigned int op_count;
|
|
unsigned int op_dmasg;
|
|
unsigned int op_dmaoff;
|
|
struct rds_znotifier *op_mmp_znotifier;
|
|
struct scatterlist *op_sg;
|
|
} data;
|
|
};
|
|
|
|
struct rds_conn_path *m_conn_path;
|
|
};
|
|
|
|
/*
|
|
* The RDS notifier is used (optionally) to tell the application about
|
|
* completed RDMA operations. Rather than keeping the whole rds message
|
|
* around on the queue, we allocate a small notifier that is put on the
|
|
* socket's notifier_list. Notifications are delivered to the application
|
|
* through control messages.
|
|
*/
|
|
struct rds_notifier {
|
|
struct list_head n_list;
|
|
uint64_t n_user_token;
|
|
int n_status;
|
|
};
|
|
|
|
/* Available as part of RDS core, so doesn't need to participate
|
|
* in get_preferred transport etc
|
|
*/
|
|
#define RDS_TRANS_LOOP 3
|
|
|
|
/**
|
|
* struct rds_transport - transport specific behavioural hooks
|
|
*
|
|
* @xmit: .xmit is called by rds_send_xmit() to tell the transport to send
|
|
* part of a message. The caller serializes on the send_sem so this
|
|
* doesn't need to be reentrant for a given conn. The header must be
|
|
* sent before the data payload. .xmit must be prepared to send a
|
|
* message with no data payload. .xmit should return the number of
|
|
* bytes that were sent down the connection, including header bytes.
|
|
* Returning 0 tells the caller that it doesn't need to perform any
|
|
* additional work now. This is usually the case when the transport has
|
|
* filled the sending queue for its connection and will handle
|
|
* triggering the rds thread to continue the send when space becomes
|
|
* available. Returning -EAGAIN tells the caller to retry the send
|
|
* immediately. Returning -ENOMEM tells the caller to retry the send at
|
|
* some point in the future.
|
|
*
|
|
* @conn_shutdown: conn_shutdown stops traffic on the given connection. Once
|
|
* it returns the connection can not call rds_recv_incoming().
|
|
* This will only be called once after conn_connect returns
|
|
* non-zero success and will The caller serializes this with
|
|
* the send and connecting paths (xmit_* and conn_*). The
|
|
* transport is responsible for other serialization, including
|
|
* rds_recv_incoming(). This is called in process context but
|
|
* should try hard not to block.
|
|
*/
|
|
|
|
struct rds_transport {
|
|
char t_name[TRANSNAMSIZ];
|
|
struct list_head t_item;
|
|
struct module *t_owner;
|
|
unsigned int t_prefer_loopback:1,
|
|
t_mp_capable:1;
|
|
unsigned int t_type;
|
|
|
|
int (*laddr_check)(struct net *net, const struct in6_addr *addr,
|
|
__u32 scope_id);
|
|
int (*conn_alloc)(struct rds_connection *conn, gfp_t gfp);
|
|
void (*conn_free)(void *data);
|
|
int (*conn_path_connect)(struct rds_conn_path *cp);
|
|
void (*conn_path_shutdown)(struct rds_conn_path *conn);
|
|
void (*xmit_path_prepare)(struct rds_conn_path *cp);
|
|
void (*xmit_path_complete)(struct rds_conn_path *cp);
|
|
int (*xmit)(struct rds_connection *conn, struct rds_message *rm,
|
|
unsigned int hdr_off, unsigned int sg, unsigned int off);
|
|
int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op);
|
|
int (*xmit_atomic)(struct rds_connection *conn, struct rm_atomic_op *op);
|
|
int (*recv_path)(struct rds_conn_path *cp);
|
|
int (*inc_copy_to_user)(struct rds_incoming *inc, struct iov_iter *to);
|
|
void (*inc_free)(struct rds_incoming *inc);
|
|
|
|
int (*cm_handle_connect)(struct rdma_cm_id *cm_id,
|
|
struct rdma_cm_event *event, bool isv6);
|
|
int (*cm_initiate_connect)(struct rdma_cm_id *cm_id, bool isv6);
|
|
void (*cm_connect_complete)(struct rds_connection *conn,
|
|
struct rdma_cm_event *event);
|
|
|
|
unsigned int (*stats_info_copy)(struct rds_info_iterator *iter,
|
|
unsigned int avail);
|
|
void (*exit)(void);
|
|
void *(*get_mr)(struct scatterlist *sg, unsigned long nr_sg,
|
|
struct rds_sock *rs, u32 *key_ret,
|
|
struct rds_connection *conn,
|
|
u64 start, u64 length, int need_odp);
|
|
void (*sync_mr)(void *trans_private, int direction);
|
|
void (*free_mr)(void *trans_private, int invalidate);
|
|
void (*flush_mrs)(void);
|
|
bool (*t_unloading)(struct rds_connection *conn);
|
|
u8 (*get_tos_map)(u8 tos);
|
|
};
|
|
|
|
/* Bind hash table key length. It is the sum of the size of a struct
|
|
* in6_addr, a scope_id and a port.
|
|
*/
|
|
#define RDS_BOUND_KEY_LEN \
|
|
(sizeof(struct in6_addr) + sizeof(__u32) + sizeof(__be16))
|
|
|
|
struct rds_sock {
|
|
struct sock rs_sk;
|
|
|
|
u64 rs_user_addr;
|
|
u64 rs_user_bytes;
|
|
|
|
/*
|
|
* bound_addr used for both incoming and outgoing, no INADDR_ANY
|
|
* support.
|
|
*/
|
|
struct rhash_head rs_bound_node;
|
|
u8 rs_bound_key[RDS_BOUND_KEY_LEN];
|
|
struct sockaddr_in6 rs_bound_sin6;
|
|
#define rs_bound_addr rs_bound_sin6.sin6_addr
|
|
#define rs_bound_addr_v4 rs_bound_sin6.sin6_addr.s6_addr32[3]
|
|
#define rs_bound_port rs_bound_sin6.sin6_port
|
|
#define rs_bound_scope_id rs_bound_sin6.sin6_scope_id
|
|
struct in6_addr rs_conn_addr;
|
|
#define rs_conn_addr_v4 rs_conn_addr.s6_addr32[3]
|
|
__be16 rs_conn_port;
|
|
struct rds_transport *rs_transport;
|
|
|
|
/*
|
|
* rds_sendmsg caches the conn it used the last time around.
|
|
* This helps avoid costly lookups.
|
|
*/
|
|
struct rds_connection *rs_conn;
|
|
|
|
/* flag indicating we were congested or not */
|
|
int rs_congested;
|
|
/* seen congestion (ENOBUFS) when sending? */
|
|
int rs_seen_congestion;
|
|
|
|
/* rs_lock protects all these adjacent members before the newline */
|
|
spinlock_t rs_lock;
|
|
struct list_head rs_send_queue;
|
|
u32 rs_snd_bytes;
|
|
int rs_rcv_bytes;
|
|
struct list_head rs_notify_queue; /* currently used for failed RDMAs */
|
|
|
|
/* Congestion wake_up. If rs_cong_monitor is set, we use cong_mask
|
|
* to decide whether the application should be woken up.
|
|
* If not set, we use rs_cong_track to find out whether a cong map
|
|
* update arrived.
|
|
*/
|
|
uint64_t rs_cong_mask;
|
|
uint64_t rs_cong_notify;
|
|
struct list_head rs_cong_list;
|
|
unsigned long rs_cong_track;
|
|
|
|
/*
|
|
* rs_recv_lock protects the receive queue, and is
|
|
* used to serialize with rds_release.
|
|
*/
|
|
rwlock_t rs_recv_lock;
|
|
struct list_head rs_recv_queue;
|
|
|
|
/* just for stats reporting */
|
|
struct list_head rs_item;
|
|
|
|
/* these have their own lock */
|
|
spinlock_t rs_rdma_lock;
|
|
struct rb_root rs_rdma_keys;
|
|
|
|
/* Socket options - in case there will be more */
|
|
unsigned char rs_recverr,
|
|
rs_cong_monitor;
|
|
u32 rs_hash_initval;
|
|
|
|
/* Socket receive path trace points*/
|
|
u8 rs_rx_traces;
|
|
u8 rs_rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
|
|
struct rds_msg_zcopy_queue rs_zcookie_queue;
|
|
u8 rs_tos;
|
|
};
|
|
|
|
static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk)
|
|
{
|
|
return container_of(sk, struct rds_sock, rs_sk);
|
|
}
|
|
static inline struct sock *rds_rs_to_sk(struct rds_sock *rs)
|
|
{
|
|
return &rs->rs_sk;
|
|
}
|
|
|
|
/*
|
|
* The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value
|
|
* to account for overhead. We don't account for overhead, we just apply
|
|
* the number of payload bytes to the specified value.
|
|
*/
|
|
static inline int rds_sk_sndbuf(struct rds_sock *rs)
|
|
{
|
|
return rds_rs_to_sk(rs)->sk_sndbuf / 2;
|
|
}
|
|
static inline int rds_sk_rcvbuf(struct rds_sock *rs)
|
|
{
|
|
return rds_rs_to_sk(rs)->sk_rcvbuf / 2;
|
|
}
|
|
|
|
struct rds_statistics {
|
|
uint64_t s_conn_reset;
|
|
uint64_t s_recv_drop_bad_checksum;
|
|
uint64_t s_recv_drop_old_seq;
|
|
uint64_t s_recv_drop_no_sock;
|
|
uint64_t s_recv_drop_dead_sock;
|
|
uint64_t s_recv_deliver_raced;
|
|
uint64_t s_recv_delivered;
|
|
uint64_t s_recv_queued;
|
|
uint64_t s_recv_immediate_retry;
|
|
uint64_t s_recv_delayed_retry;
|
|
uint64_t s_recv_ack_required;
|
|
uint64_t s_recv_rdma_bytes;
|
|
uint64_t s_recv_ping;
|
|
uint64_t s_send_queue_empty;
|
|
uint64_t s_send_queue_full;
|
|
uint64_t s_send_lock_contention;
|
|
uint64_t s_send_lock_queue_raced;
|
|
uint64_t s_send_immediate_retry;
|
|
uint64_t s_send_delayed_retry;
|
|
uint64_t s_send_drop_acked;
|
|
uint64_t s_send_ack_required;
|
|
uint64_t s_send_queued;
|
|
uint64_t s_send_rdma;
|
|
uint64_t s_send_rdma_bytes;
|
|
uint64_t s_send_pong;
|
|
uint64_t s_page_remainder_hit;
|
|
uint64_t s_page_remainder_miss;
|
|
uint64_t s_copy_to_user;
|
|
uint64_t s_copy_from_user;
|
|
uint64_t s_cong_update_queued;
|
|
uint64_t s_cong_update_received;
|
|
uint64_t s_cong_send_error;
|
|
uint64_t s_cong_send_blocked;
|
|
uint64_t s_recv_bytes_added_to_socket;
|
|
uint64_t s_recv_bytes_removed_from_socket;
|
|
uint64_t s_send_stuck_rm;
|
|
};
|
|
|
|
/* af_rds.c */
|
|
void rds_sock_addref(struct rds_sock *rs);
|
|
void rds_sock_put(struct rds_sock *rs);
|
|
void rds_wake_sk_sleep(struct rds_sock *rs);
|
|
static inline void __rds_wake_sk_sleep(struct sock *sk)
|
|
{
|
|
wait_queue_head_t *waitq = sk_sleep(sk);
|
|
|
|
if (!sock_flag(sk, SOCK_DEAD) && waitq)
|
|
wake_up(waitq);
|
|
}
|
|
extern wait_queue_head_t rds_poll_waitq;
|
|
|
|
|
|
/* bind.c */
|
|
int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
|
|
void rds_remove_bound(struct rds_sock *rs);
|
|
struct rds_sock *rds_find_bound(const struct in6_addr *addr, __be16 port,
|
|
__u32 scope_id);
|
|
int rds_bind_lock_init(void);
|
|
void rds_bind_lock_destroy(void);
|
|
|
|
/* cong.c */
|
|
int rds_cong_get_maps(struct rds_connection *conn);
|
|
void rds_cong_add_conn(struct rds_connection *conn);
|
|
void rds_cong_remove_conn(struct rds_connection *conn);
|
|
void rds_cong_set_bit(struct rds_cong_map *map, __be16 port);
|
|
void rds_cong_clear_bit(struct rds_cong_map *map, __be16 port);
|
|
int rds_cong_wait(struct rds_cong_map *map, __be16 port, int nonblock, struct rds_sock *rs);
|
|
void rds_cong_queue_updates(struct rds_cong_map *map);
|
|
void rds_cong_map_updated(struct rds_cong_map *map, uint64_t);
|
|
int rds_cong_updated_since(unsigned long *recent);
|
|
void rds_cong_add_socket(struct rds_sock *);
|
|
void rds_cong_remove_socket(struct rds_sock *);
|
|
void rds_cong_exit(void);
|
|
struct rds_message *rds_cong_update_alloc(struct rds_connection *conn);
|
|
|
|
/* connection.c */
|
|
extern u32 rds_gen_num;
|
|
int rds_conn_init(void);
|
|
void rds_conn_exit(void);
|
|
struct rds_connection *rds_conn_create(struct net *net,
|
|
const struct in6_addr *laddr,
|
|
const struct in6_addr *faddr,
|
|
struct rds_transport *trans,
|
|
u8 tos, gfp_t gfp,
|
|
int dev_if);
|
|
struct rds_connection *rds_conn_create_outgoing(struct net *net,
|
|
const struct in6_addr *laddr,
|
|
const struct in6_addr *faddr,
|
|
struct rds_transport *trans,
|
|
u8 tos, gfp_t gfp, int dev_if);
|
|
void rds_conn_shutdown(struct rds_conn_path *cpath);
|
|
void rds_conn_destroy(struct rds_connection *conn);
|
|
void rds_conn_drop(struct rds_connection *conn);
|
|
void rds_conn_path_drop(struct rds_conn_path *cpath, bool destroy);
|
|
void rds_conn_connect_if_down(struct rds_connection *conn);
|
|
void rds_conn_path_connect_if_down(struct rds_conn_path *cp);
|
|
void rds_check_all_paths(struct rds_connection *conn);
|
|
void rds_for_each_conn_info(struct socket *sock, unsigned int len,
|
|
struct rds_info_iterator *iter,
|
|
struct rds_info_lengths *lens,
|
|
int (*visitor)(struct rds_connection *, void *),
|
|
u64 *buffer,
|
|
size_t item_len);
|
|
|
|
__printf(2, 3)
|
|
void __rds_conn_path_error(struct rds_conn_path *cp, const char *, ...);
|
|
#define rds_conn_path_error(cp, fmt...) \
|
|
__rds_conn_path_error(cp, KERN_WARNING "RDS: " fmt)
|
|
|
|
static inline int
|
|
rds_conn_path_transition(struct rds_conn_path *cp, int old, int new)
|
|
{
|
|
return atomic_cmpxchg(&cp->cp_state, old, new) == old;
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_transition(struct rds_connection *conn, int old, int new)
|
|
{
|
|
WARN_ON(conn->c_trans->t_mp_capable);
|
|
return rds_conn_path_transition(&conn->c_path[0], old, new);
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_path_state(struct rds_conn_path *cp)
|
|
{
|
|
return atomic_read(&cp->cp_state);
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_state(struct rds_connection *conn)
|
|
{
|
|
WARN_ON(conn->c_trans->t_mp_capable);
|
|
return rds_conn_path_state(&conn->c_path[0]);
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_path_up(struct rds_conn_path *cp)
|
|
{
|
|
return atomic_read(&cp->cp_state) == RDS_CONN_UP;
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_path_down(struct rds_conn_path *cp)
|
|
{
|
|
return atomic_read(&cp->cp_state) == RDS_CONN_DOWN;
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_up(struct rds_connection *conn)
|
|
{
|
|
WARN_ON(conn->c_trans->t_mp_capable);
|
|
return rds_conn_path_up(&conn->c_path[0]);
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_path_connecting(struct rds_conn_path *cp)
|
|
{
|
|
return atomic_read(&cp->cp_state) == RDS_CONN_CONNECTING;
|
|
}
|
|
|
|
static inline int
|
|
rds_conn_connecting(struct rds_connection *conn)
|
|
{
|
|
WARN_ON(conn->c_trans->t_mp_capable);
|
|
return rds_conn_path_connecting(&conn->c_path[0]);
|
|
}
|
|
|
|
/* message.c */
|
|
struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp);
|
|
struct scatterlist *rds_message_alloc_sgs(struct rds_message *rm, int nents);
|
|
int rds_message_copy_from_user(struct rds_message *rm, struct iov_iter *from,
|
|
bool zcopy);
|
|
struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len);
|
|
void rds_message_populate_header(struct rds_header *hdr, __be16 sport,
|
|
__be16 dport, u64 seq);
|
|
int rds_message_add_extension(struct rds_header *hdr,
|
|
unsigned int type, const void *data, unsigned int len);
|
|
int rds_message_next_extension(struct rds_header *hdr,
|
|
unsigned int *pos, void *buf, unsigned int *buflen);
|
|
int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset);
|
|
int rds_message_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
|
|
void rds_message_inc_free(struct rds_incoming *inc);
|
|
void rds_message_addref(struct rds_message *rm);
|
|
void rds_message_put(struct rds_message *rm);
|
|
void rds_message_wait(struct rds_message *rm);
|
|
void rds_message_unmapped(struct rds_message *rm);
|
|
void rds_notify_msg_zcopy_purge(struct rds_msg_zcopy_queue *info);
|
|
|
|
static inline void rds_message_make_checksum(struct rds_header *hdr)
|
|
{
|
|
hdr->h_csum = 0;
|
|
hdr->h_csum = ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2);
|
|
}
|
|
|
|
static inline int rds_message_verify_checksum(const struct rds_header *hdr)
|
|
{
|
|
return !hdr->h_csum || ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2) == 0;
|
|
}
|
|
|
|
|
|
/* page.c */
|
|
int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes,
|
|
gfp_t gfp);
|
|
void rds_page_exit(void);
|
|
|
|
/* recv.c */
|
|
void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
|
|
struct in6_addr *saddr);
|
|
void rds_inc_path_init(struct rds_incoming *inc, struct rds_conn_path *conn,
|
|
struct in6_addr *saddr);
|
|
void rds_inc_put(struct rds_incoming *inc);
|
|
void rds_recv_incoming(struct rds_connection *conn, struct in6_addr *saddr,
|
|
struct in6_addr *daddr,
|
|
struct rds_incoming *inc, gfp_t gfp);
|
|
int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
|
|
int msg_flags);
|
|
void rds_clear_recv_queue(struct rds_sock *rs);
|
|
int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msg);
|
|
void rds_inc_info_copy(struct rds_incoming *inc,
|
|
struct rds_info_iterator *iter,
|
|
__be32 saddr, __be32 daddr, int flip);
|
|
void rds6_inc_info_copy(struct rds_incoming *inc,
|
|
struct rds_info_iterator *iter,
|
|
struct in6_addr *saddr, struct in6_addr *daddr,
|
|
int flip);
|
|
|
|
/* send.c */
|
|
int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len);
|
|
void rds_send_path_reset(struct rds_conn_path *conn);
|
|
int rds_send_xmit(struct rds_conn_path *cp);
|
|
struct sockaddr_in;
|
|
void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in6 *dest);
|
|
typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack);
|
|
void rds_send_drop_acked(struct rds_connection *conn, u64 ack,
|
|
is_acked_func is_acked);
|
|
void rds_send_path_drop_acked(struct rds_conn_path *cp, u64 ack,
|
|
is_acked_func is_acked);
|
|
void rds_send_ping(struct rds_connection *conn, int cp_index);
|
|
int rds_send_pong(struct rds_conn_path *cp, __be16 dport);
|
|
|
|
/* rdma.c */
|
|
void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force);
|
|
int rds_get_mr(struct rds_sock *rs, sockptr_t optval, int optlen);
|
|
int rds_get_mr_for_dest(struct rds_sock *rs, sockptr_t optval, int optlen);
|
|
int rds_free_mr(struct rds_sock *rs, sockptr_t optval, int optlen);
|
|
void rds_rdma_drop_keys(struct rds_sock *rs);
|
|
int rds_rdma_extra_size(struct rds_rdma_args *args,
|
|
struct rds_iov_vector *iov);
|
|
int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg,
|
|
struct rds_iov_vector *vec);
|
|
int rds_cmsg_rdma_map(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
void rds_rdma_free_op(struct rm_rdma_op *ro);
|
|
void rds_atomic_free_op(struct rm_atomic_op *ao);
|
|
void rds_rdma_send_complete(struct rds_message *rm, int wc_status);
|
|
void rds_atomic_send_complete(struct rds_message *rm, int wc_status);
|
|
int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm,
|
|
struct cmsghdr *cmsg);
|
|
|
|
void __rds_put_mr_final(struct kref *kref);
|
|
|
|
static inline bool rds_destroy_pending(struct rds_connection *conn)
|
|
{
|
|
return !check_net(rds_conn_net(conn)) ||
|
|
(conn->c_trans->t_unloading && conn->c_trans->t_unloading(conn));
|
|
}
|
|
|
|
enum {
|
|
ODP_NOT_NEEDED,
|
|
ODP_ZEROBASED,
|
|
ODP_VIRTUAL
|
|
};
|
|
|
|
/* stats.c */
|
|
DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);
|
|
#define rds_stats_inc_which(which, member) do { \
|
|
per_cpu(which, get_cpu()).member++; \
|
|
put_cpu(); \
|
|
} while (0)
|
|
#define rds_stats_inc(member) rds_stats_inc_which(rds_stats, member)
|
|
#define rds_stats_add_which(which, member, count) do { \
|
|
per_cpu(which, get_cpu()).member += count; \
|
|
put_cpu(); \
|
|
} while (0)
|
|
#define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count)
|
|
int rds_stats_init(void);
|
|
void rds_stats_exit(void);
|
|
void rds_stats_info_copy(struct rds_info_iterator *iter,
|
|
uint64_t *values, const char *const *names,
|
|
size_t nr);
|
|
|
|
/* sysctl.c */
|
|
int rds_sysctl_init(void);
|
|
void rds_sysctl_exit(void);
|
|
extern unsigned long rds_sysctl_sndbuf_min;
|
|
extern unsigned long rds_sysctl_sndbuf_default;
|
|
extern unsigned long rds_sysctl_sndbuf_max;
|
|
extern unsigned long rds_sysctl_reconnect_min_jiffies;
|
|
extern unsigned long rds_sysctl_reconnect_max_jiffies;
|
|
extern unsigned int rds_sysctl_max_unacked_packets;
|
|
extern unsigned int rds_sysctl_max_unacked_bytes;
|
|
extern unsigned int rds_sysctl_ping_enable;
|
|
extern unsigned long rds_sysctl_trace_flags;
|
|
extern unsigned int rds_sysctl_trace_level;
|
|
|
|
/* threads.c */
|
|
int rds_threads_init(void);
|
|
void rds_threads_exit(void);
|
|
extern struct workqueue_struct *rds_wq;
|
|
void rds_queue_reconnect(struct rds_conn_path *cp);
|
|
void rds_connect_worker(struct work_struct *);
|
|
void rds_shutdown_worker(struct work_struct *);
|
|
void rds_send_worker(struct work_struct *);
|
|
void rds_recv_worker(struct work_struct *);
|
|
void rds_connect_path_complete(struct rds_conn_path *conn, int curr);
|
|
void rds_connect_complete(struct rds_connection *conn);
|
|
int rds_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2);
|
|
|
|
/* transport.c */
|
|
void rds_trans_register(struct rds_transport *trans);
|
|
void rds_trans_unregister(struct rds_transport *trans);
|
|
struct rds_transport *rds_trans_get_preferred(struct net *net,
|
|
const struct in6_addr *addr,
|
|
__u32 scope_id);
|
|
void rds_trans_put(struct rds_transport *trans);
|
|
unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter,
|
|
unsigned int avail);
|
|
struct rds_transport *rds_trans_get(int t_type);
|
|
int rds_trans_init(void);
|
|
void rds_trans_exit(void);
|
|
|
|
#endif
|