1657 lines
38 KiB
C
1657 lines
38 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016 Avago Technologies. All rights reserved.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/parser.h>
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#include <uapi/scsi/fc/fc_fs.h>
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#include "../host/nvme.h"
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#include "../target/nvmet.h"
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#include <linux/nvme-fc-driver.h>
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#include <linux/nvme-fc.h>
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enum {
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NVMF_OPT_ERR = 0,
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NVMF_OPT_WWNN = 1 << 0,
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NVMF_OPT_WWPN = 1 << 1,
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NVMF_OPT_ROLES = 1 << 2,
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NVMF_OPT_FCADDR = 1 << 3,
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NVMF_OPT_LPWWNN = 1 << 4,
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NVMF_OPT_LPWWPN = 1 << 5,
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};
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struct fcloop_ctrl_options {
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int mask;
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u64 wwnn;
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u64 wwpn;
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u32 roles;
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u32 fcaddr;
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u64 lpwwnn;
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u64 lpwwpn;
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};
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static const match_table_t opt_tokens = {
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{ NVMF_OPT_WWNN, "wwnn=%s" },
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{ NVMF_OPT_WWPN, "wwpn=%s" },
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{ NVMF_OPT_ROLES, "roles=%d" },
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{ NVMF_OPT_FCADDR, "fcaddr=%x" },
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{ NVMF_OPT_LPWWNN, "lpwwnn=%s" },
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{ NVMF_OPT_LPWWPN, "lpwwpn=%s" },
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{ NVMF_OPT_ERR, NULL }
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};
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static int fcloop_verify_addr(substring_t *s)
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{
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size_t blen = s->to - s->from + 1;
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if (strnlen(s->from, blen) != NVME_FC_TRADDR_HEXNAMELEN + 2 ||
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strncmp(s->from, "0x", 2))
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return -EINVAL;
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return 0;
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}
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static int
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fcloop_parse_options(struct fcloop_ctrl_options *opts,
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const char *buf)
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{
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substring_t args[MAX_OPT_ARGS];
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char *options, *o, *p;
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int token, ret = 0;
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u64 token64;
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options = o = kstrdup(buf, GFP_KERNEL);
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if (!options)
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return -ENOMEM;
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while ((p = strsep(&o, ",\n")) != NULL) {
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if (!*p)
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continue;
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token = match_token(p, opt_tokens, args);
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opts->mask |= token;
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switch (token) {
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case NVMF_OPT_WWNN:
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if (fcloop_verify_addr(args) ||
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match_u64(args, &token64)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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opts->wwnn = token64;
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break;
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case NVMF_OPT_WWPN:
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if (fcloop_verify_addr(args) ||
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match_u64(args, &token64)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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opts->wwpn = token64;
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break;
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case NVMF_OPT_ROLES:
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if (match_int(args, &token)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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opts->roles = token;
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break;
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case NVMF_OPT_FCADDR:
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if (match_hex(args, &token)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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opts->fcaddr = token;
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break;
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case NVMF_OPT_LPWWNN:
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if (fcloop_verify_addr(args) ||
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match_u64(args, &token64)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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opts->lpwwnn = token64;
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break;
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case NVMF_OPT_LPWWPN:
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if (fcloop_verify_addr(args) ||
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match_u64(args, &token64)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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opts->lpwwpn = token64;
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break;
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default:
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pr_warn("unknown parameter or missing value '%s'\n", p);
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ret = -EINVAL;
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goto out_free_options;
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}
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}
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out_free_options:
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kfree(options);
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return ret;
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}
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static int
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fcloop_parse_nm_options(struct device *dev, u64 *nname, u64 *pname,
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const char *buf)
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{
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substring_t args[MAX_OPT_ARGS];
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char *options, *o, *p;
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int token, ret = 0;
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u64 token64;
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*nname = -1;
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*pname = -1;
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options = o = kstrdup(buf, GFP_KERNEL);
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if (!options)
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return -ENOMEM;
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while ((p = strsep(&o, ",\n")) != NULL) {
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if (!*p)
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continue;
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token = match_token(p, opt_tokens, args);
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switch (token) {
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case NVMF_OPT_WWNN:
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if (fcloop_verify_addr(args) ||
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match_u64(args, &token64)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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*nname = token64;
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break;
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case NVMF_OPT_WWPN:
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if (fcloop_verify_addr(args) ||
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match_u64(args, &token64)) {
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ret = -EINVAL;
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goto out_free_options;
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}
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*pname = token64;
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break;
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default:
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pr_warn("unknown parameter or missing value '%s'\n", p);
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ret = -EINVAL;
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goto out_free_options;
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}
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}
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out_free_options:
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kfree(options);
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if (!ret) {
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if (*nname == -1)
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return -EINVAL;
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if (*pname == -1)
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return -EINVAL;
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}
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return ret;
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}
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#define LPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN)
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#define RPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN | \
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NVMF_OPT_LPWWNN | NVMF_OPT_LPWWPN)
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#define TGTPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN)
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static DEFINE_SPINLOCK(fcloop_lock);
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static LIST_HEAD(fcloop_lports);
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static LIST_HEAD(fcloop_nports);
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struct fcloop_lport {
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struct nvme_fc_local_port *localport;
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struct list_head lport_list;
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struct completion unreg_done;
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};
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struct fcloop_lport_priv {
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struct fcloop_lport *lport;
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};
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struct fcloop_rport {
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struct nvme_fc_remote_port *remoteport;
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struct nvmet_fc_target_port *targetport;
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struct fcloop_nport *nport;
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struct fcloop_lport *lport;
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spinlock_t lock;
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struct list_head ls_list;
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struct work_struct ls_work;
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};
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struct fcloop_tport {
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struct nvmet_fc_target_port *targetport;
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struct nvme_fc_remote_port *remoteport;
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struct fcloop_nport *nport;
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struct fcloop_lport *lport;
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spinlock_t lock;
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struct list_head ls_list;
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struct work_struct ls_work;
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};
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struct fcloop_nport {
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struct fcloop_rport *rport;
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struct fcloop_tport *tport;
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struct fcloop_lport *lport;
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struct list_head nport_list;
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struct kref ref;
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u64 node_name;
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u64 port_name;
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u32 port_role;
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u32 port_id;
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};
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struct fcloop_lsreq {
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struct nvmefc_ls_req *lsreq;
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struct nvmefc_ls_rsp ls_rsp;
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int lsdir; /* H2T or T2H */
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int status;
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struct list_head ls_list; /* fcloop_rport->ls_list */
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};
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struct fcloop_rscn {
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struct fcloop_tport *tport;
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struct work_struct work;
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};
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enum {
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INI_IO_START = 0,
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INI_IO_ACTIVE = 1,
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INI_IO_ABORTED = 2,
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INI_IO_COMPLETED = 3,
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};
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struct fcloop_fcpreq {
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struct fcloop_tport *tport;
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struct nvmefc_fcp_req *fcpreq;
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spinlock_t reqlock;
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u16 status;
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u32 inistate;
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bool active;
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bool aborted;
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struct kref ref;
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struct work_struct fcp_rcv_work;
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struct work_struct abort_rcv_work;
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struct work_struct tio_done_work;
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struct nvmefc_tgt_fcp_req tgt_fcp_req;
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};
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struct fcloop_ini_fcpreq {
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struct nvmefc_fcp_req *fcpreq;
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struct fcloop_fcpreq *tfcp_req;
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spinlock_t inilock;
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};
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static inline struct fcloop_lsreq *
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ls_rsp_to_lsreq(struct nvmefc_ls_rsp *lsrsp)
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{
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return container_of(lsrsp, struct fcloop_lsreq, ls_rsp);
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}
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static inline struct fcloop_fcpreq *
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tgt_fcp_req_to_fcpreq(struct nvmefc_tgt_fcp_req *tgt_fcpreq)
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{
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return container_of(tgt_fcpreq, struct fcloop_fcpreq, tgt_fcp_req);
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}
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static int
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fcloop_create_queue(struct nvme_fc_local_port *localport,
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unsigned int qidx, u16 qsize,
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void **handle)
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{
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*handle = localport;
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return 0;
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}
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static void
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fcloop_delete_queue(struct nvme_fc_local_port *localport,
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unsigned int idx, void *handle)
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{
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}
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static void
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fcloop_rport_lsrqst_work(struct work_struct *work)
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{
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struct fcloop_rport *rport =
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container_of(work, struct fcloop_rport, ls_work);
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struct fcloop_lsreq *tls_req;
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spin_lock(&rport->lock);
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for (;;) {
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tls_req = list_first_entry_or_null(&rport->ls_list,
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struct fcloop_lsreq, ls_list);
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if (!tls_req)
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break;
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list_del(&tls_req->ls_list);
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spin_unlock(&rport->lock);
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tls_req->lsreq->done(tls_req->lsreq, tls_req->status);
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/*
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* callee may free memory containing tls_req.
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* do not reference lsreq after this.
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*/
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spin_lock(&rport->lock);
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}
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spin_unlock(&rport->lock);
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}
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static int
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fcloop_h2t_ls_req(struct nvme_fc_local_port *localport,
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struct nvme_fc_remote_port *remoteport,
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struct nvmefc_ls_req *lsreq)
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{
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struct fcloop_lsreq *tls_req = lsreq->private;
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struct fcloop_rport *rport = remoteport->private;
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int ret = 0;
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tls_req->lsreq = lsreq;
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INIT_LIST_HEAD(&tls_req->ls_list);
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if (!rport->targetport) {
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tls_req->status = -ECONNREFUSED;
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spin_lock(&rport->lock);
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list_add_tail(&rport->ls_list, &tls_req->ls_list);
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spin_unlock(&rport->lock);
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queue_work(nvmet_wq, &rport->ls_work);
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return ret;
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}
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tls_req->status = 0;
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ret = nvmet_fc_rcv_ls_req(rport->targetport, rport,
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&tls_req->ls_rsp,
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lsreq->rqstaddr, lsreq->rqstlen);
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return ret;
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}
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static int
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fcloop_h2t_xmt_ls_rsp(struct nvmet_fc_target_port *targetport,
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struct nvmefc_ls_rsp *lsrsp)
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{
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struct fcloop_lsreq *tls_req = ls_rsp_to_lsreq(lsrsp);
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struct nvmefc_ls_req *lsreq = tls_req->lsreq;
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struct fcloop_tport *tport = targetport->private;
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struct nvme_fc_remote_port *remoteport = tport->remoteport;
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struct fcloop_rport *rport;
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memcpy(lsreq->rspaddr, lsrsp->rspbuf,
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((lsreq->rsplen < lsrsp->rsplen) ?
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lsreq->rsplen : lsrsp->rsplen));
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lsrsp->done(lsrsp);
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if (remoteport) {
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rport = remoteport->private;
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spin_lock(&rport->lock);
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list_add_tail(&rport->ls_list, &tls_req->ls_list);
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spin_unlock(&rport->lock);
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queue_work(nvmet_wq, &rport->ls_work);
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}
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return 0;
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}
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static void
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fcloop_tport_lsrqst_work(struct work_struct *work)
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{
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struct fcloop_tport *tport =
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container_of(work, struct fcloop_tport, ls_work);
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struct fcloop_lsreq *tls_req;
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spin_lock(&tport->lock);
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for (;;) {
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tls_req = list_first_entry_or_null(&tport->ls_list,
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struct fcloop_lsreq, ls_list);
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if (!tls_req)
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break;
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list_del(&tls_req->ls_list);
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spin_unlock(&tport->lock);
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tls_req->lsreq->done(tls_req->lsreq, tls_req->status);
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/*
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* callee may free memory containing tls_req.
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* do not reference lsreq after this.
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*/
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spin_lock(&tport->lock);
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}
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spin_unlock(&tport->lock);
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}
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static int
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fcloop_t2h_ls_req(struct nvmet_fc_target_port *targetport, void *hosthandle,
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struct nvmefc_ls_req *lsreq)
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{
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struct fcloop_lsreq *tls_req = lsreq->private;
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struct fcloop_tport *tport = targetport->private;
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int ret = 0;
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/*
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* hosthandle should be the dst.rport value.
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* hosthandle ignored as fcloop currently is
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* 1:1 tgtport vs remoteport
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*/
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tls_req->lsreq = lsreq;
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INIT_LIST_HEAD(&tls_req->ls_list);
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if (!tport->remoteport) {
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tls_req->status = -ECONNREFUSED;
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spin_lock(&tport->lock);
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list_add_tail(&tport->ls_list, &tls_req->ls_list);
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spin_unlock(&tport->lock);
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queue_work(nvmet_wq, &tport->ls_work);
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return ret;
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}
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tls_req->status = 0;
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ret = nvme_fc_rcv_ls_req(tport->remoteport, &tls_req->ls_rsp,
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lsreq->rqstaddr, lsreq->rqstlen);
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return ret;
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}
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static int
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fcloop_t2h_xmt_ls_rsp(struct nvme_fc_local_port *localport,
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struct nvme_fc_remote_port *remoteport,
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struct nvmefc_ls_rsp *lsrsp)
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{
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struct fcloop_lsreq *tls_req = ls_rsp_to_lsreq(lsrsp);
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struct nvmefc_ls_req *lsreq = tls_req->lsreq;
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struct fcloop_rport *rport = remoteport->private;
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struct nvmet_fc_target_port *targetport = rport->targetport;
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struct fcloop_tport *tport;
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memcpy(lsreq->rspaddr, lsrsp->rspbuf,
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((lsreq->rsplen < lsrsp->rsplen) ?
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lsreq->rsplen : lsrsp->rsplen));
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lsrsp->done(lsrsp);
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if (targetport) {
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tport = targetport->private;
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spin_lock(&tport->lock);
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list_add_tail(&tport->ls_list, &tls_req->ls_list);
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spin_unlock(&tport->lock);
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queue_work(nvmet_wq, &tport->ls_work);
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}
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return 0;
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}
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static void
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fcloop_t2h_host_release(void *hosthandle)
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{
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/* host handle ignored for now */
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}
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|
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/*
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* Simulate reception of RSCN and converting it to a initiator transport
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* call to rescan a remote port.
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*/
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static void
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fcloop_tgt_rscn_work(struct work_struct *work)
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{
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struct fcloop_rscn *tgt_rscn =
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container_of(work, struct fcloop_rscn, work);
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struct fcloop_tport *tport = tgt_rscn->tport;
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if (tport->remoteport)
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nvme_fc_rescan_remoteport(tport->remoteport);
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kfree(tgt_rscn);
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}
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static void
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fcloop_tgt_discovery_evt(struct nvmet_fc_target_port *tgtport)
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{
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struct fcloop_rscn *tgt_rscn;
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|
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tgt_rscn = kzalloc(sizeof(*tgt_rscn), GFP_KERNEL);
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if (!tgt_rscn)
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return;
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tgt_rscn->tport = tgtport->private;
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INIT_WORK(&tgt_rscn->work, fcloop_tgt_rscn_work);
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|
|
queue_work(nvmet_wq, &tgt_rscn->work);
|
|
}
|
|
|
|
static void
|
|
fcloop_tfcp_req_free(struct kref *ref)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req =
|
|
container_of(ref, struct fcloop_fcpreq, ref);
|
|
|
|
kfree(tfcp_req);
|
|
}
|
|
|
|
static void
|
|
fcloop_tfcp_req_put(struct fcloop_fcpreq *tfcp_req)
|
|
{
|
|
kref_put(&tfcp_req->ref, fcloop_tfcp_req_free);
|
|
}
|
|
|
|
static int
|
|
fcloop_tfcp_req_get(struct fcloop_fcpreq *tfcp_req)
|
|
{
|
|
return kref_get_unless_zero(&tfcp_req->ref);
|
|
}
|
|
|
|
static void
|
|
fcloop_call_host_done(struct nvmefc_fcp_req *fcpreq,
|
|
struct fcloop_fcpreq *tfcp_req, int status)
|
|
{
|
|
struct fcloop_ini_fcpreq *inireq = NULL;
|
|
|
|
if (fcpreq) {
|
|
inireq = fcpreq->private;
|
|
spin_lock(&inireq->inilock);
|
|
inireq->tfcp_req = NULL;
|
|
spin_unlock(&inireq->inilock);
|
|
|
|
fcpreq->status = status;
|
|
fcpreq->done(fcpreq);
|
|
}
|
|
|
|
/* release original io reference on tgt struct */
|
|
fcloop_tfcp_req_put(tfcp_req);
|
|
}
|
|
|
|
static bool drop_fabric_opcode;
|
|
#define DROP_OPCODE_MASK 0x00FF
|
|
/* fabrics opcode will have a bit set above 1st byte */
|
|
static int drop_opcode = -1;
|
|
static int drop_instance;
|
|
static int drop_amount;
|
|
static int drop_current_cnt;
|
|
|
|
/*
|
|
* Routine to parse io and determine if the io is to be dropped.
|
|
* Returns:
|
|
* 0 if io is not obstructed
|
|
* 1 if io was dropped
|
|
*/
|
|
static int check_for_drop(struct fcloop_fcpreq *tfcp_req)
|
|
{
|
|
struct nvmefc_fcp_req *fcpreq = tfcp_req->fcpreq;
|
|
struct nvme_fc_cmd_iu *cmdiu = fcpreq->cmdaddr;
|
|
struct nvme_command *sqe = &cmdiu->sqe;
|
|
|
|
if (drop_opcode == -1)
|
|
return 0;
|
|
|
|
pr_info("%s: seq opcd x%02x fctype x%02x: drop F %s op x%02x "
|
|
"inst %d start %d amt %d\n",
|
|
__func__, sqe->common.opcode, sqe->fabrics.fctype,
|
|
drop_fabric_opcode ? "y" : "n",
|
|
drop_opcode, drop_current_cnt, drop_instance, drop_amount);
|
|
|
|
if ((drop_fabric_opcode &&
|
|
(sqe->common.opcode != nvme_fabrics_command ||
|
|
sqe->fabrics.fctype != drop_opcode)) ||
|
|
(!drop_fabric_opcode && sqe->common.opcode != drop_opcode))
|
|
return 0;
|
|
|
|
if (++drop_current_cnt >= drop_instance) {
|
|
if (drop_current_cnt >= drop_instance + drop_amount)
|
|
drop_opcode = -1;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
fcloop_fcp_recv_work(struct work_struct *work)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req =
|
|
container_of(work, struct fcloop_fcpreq, fcp_rcv_work);
|
|
struct nvmefc_fcp_req *fcpreq = tfcp_req->fcpreq;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
bool aborted = false;
|
|
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
switch (tfcp_req->inistate) {
|
|
case INI_IO_START:
|
|
tfcp_req->inistate = INI_IO_ACTIVE;
|
|
break;
|
|
case INI_IO_ABORTED:
|
|
aborted = true;
|
|
break;
|
|
default:
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
if (unlikely(aborted))
|
|
ret = -ECANCELED;
|
|
else {
|
|
if (likely(!check_for_drop(tfcp_req)))
|
|
ret = nvmet_fc_rcv_fcp_req(tfcp_req->tport->targetport,
|
|
&tfcp_req->tgt_fcp_req,
|
|
fcpreq->cmdaddr, fcpreq->cmdlen);
|
|
else
|
|
pr_info("%s: dropped command ********\n", __func__);
|
|
}
|
|
if (ret)
|
|
fcloop_call_host_done(fcpreq, tfcp_req, ret);
|
|
}
|
|
|
|
static void
|
|
fcloop_fcp_abort_recv_work(struct work_struct *work)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req =
|
|
container_of(work, struct fcloop_fcpreq, abort_rcv_work);
|
|
struct nvmefc_fcp_req *fcpreq;
|
|
bool completed = false;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
fcpreq = tfcp_req->fcpreq;
|
|
switch (tfcp_req->inistate) {
|
|
case INI_IO_ABORTED:
|
|
break;
|
|
case INI_IO_COMPLETED:
|
|
completed = true;
|
|
break;
|
|
default:
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
if (unlikely(completed)) {
|
|
/* remove reference taken in original abort downcall */
|
|
fcloop_tfcp_req_put(tfcp_req);
|
|
return;
|
|
}
|
|
|
|
if (tfcp_req->tport->targetport)
|
|
nvmet_fc_rcv_fcp_abort(tfcp_req->tport->targetport,
|
|
&tfcp_req->tgt_fcp_req);
|
|
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
tfcp_req->fcpreq = NULL;
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
fcloop_call_host_done(fcpreq, tfcp_req, -ECANCELED);
|
|
/* call_host_done releases reference for abort downcall */
|
|
}
|
|
|
|
/*
|
|
* FCP IO operation done by target completion.
|
|
* call back up initiator "done" flows.
|
|
*/
|
|
static void
|
|
fcloop_tgt_fcprqst_done_work(struct work_struct *work)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req =
|
|
container_of(work, struct fcloop_fcpreq, tio_done_work);
|
|
struct nvmefc_fcp_req *fcpreq;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
fcpreq = tfcp_req->fcpreq;
|
|
tfcp_req->inistate = INI_IO_COMPLETED;
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
fcloop_call_host_done(fcpreq, tfcp_req, tfcp_req->status);
|
|
}
|
|
|
|
|
|
static int
|
|
fcloop_fcp_req(struct nvme_fc_local_port *localport,
|
|
struct nvme_fc_remote_port *remoteport,
|
|
void *hw_queue_handle,
|
|
struct nvmefc_fcp_req *fcpreq)
|
|
{
|
|
struct fcloop_rport *rport = remoteport->private;
|
|
struct fcloop_ini_fcpreq *inireq = fcpreq->private;
|
|
struct fcloop_fcpreq *tfcp_req;
|
|
|
|
if (!rport->targetport)
|
|
return -ECONNREFUSED;
|
|
|
|
tfcp_req = kzalloc(sizeof(*tfcp_req), GFP_ATOMIC);
|
|
if (!tfcp_req)
|
|
return -ENOMEM;
|
|
|
|
inireq->fcpreq = fcpreq;
|
|
inireq->tfcp_req = tfcp_req;
|
|
spin_lock_init(&inireq->inilock);
|
|
|
|
tfcp_req->fcpreq = fcpreq;
|
|
tfcp_req->tport = rport->targetport->private;
|
|
tfcp_req->inistate = INI_IO_START;
|
|
spin_lock_init(&tfcp_req->reqlock);
|
|
INIT_WORK(&tfcp_req->fcp_rcv_work, fcloop_fcp_recv_work);
|
|
INIT_WORK(&tfcp_req->abort_rcv_work, fcloop_fcp_abort_recv_work);
|
|
INIT_WORK(&tfcp_req->tio_done_work, fcloop_tgt_fcprqst_done_work);
|
|
kref_init(&tfcp_req->ref);
|
|
|
|
queue_work(nvmet_wq, &tfcp_req->fcp_rcv_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
fcloop_fcp_copy_data(u8 op, struct scatterlist *data_sg,
|
|
struct scatterlist *io_sg, u32 offset, u32 length)
|
|
{
|
|
void *data_p, *io_p;
|
|
u32 data_len, io_len, tlen;
|
|
|
|
io_p = sg_virt(io_sg);
|
|
io_len = io_sg->length;
|
|
|
|
for ( ; offset; ) {
|
|
tlen = min_t(u32, offset, io_len);
|
|
offset -= tlen;
|
|
io_len -= tlen;
|
|
if (!io_len) {
|
|
io_sg = sg_next(io_sg);
|
|
io_p = sg_virt(io_sg);
|
|
io_len = io_sg->length;
|
|
} else
|
|
io_p += tlen;
|
|
}
|
|
|
|
data_p = sg_virt(data_sg);
|
|
data_len = data_sg->length;
|
|
|
|
for ( ; length; ) {
|
|
tlen = min_t(u32, io_len, data_len);
|
|
tlen = min_t(u32, tlen, length);
|
|
|
|
if (op == NVMET_FCOP_WRITEDATA)
|
|
memcpy(data_p, io_p, tlen);
|
|
else
|
|
memcpy(io_p, data_p, tlen);
|
|
|
|
length -= tlen;
|
|
|
|
io_len -= tlen;
|
|
if ((!io_len) && (length)) {
|
|
io_sg = sg_next(io_sg);
|
|
io_p = sg_virt(io_sg);
|
|
io_len = io_sg->length;
|
|
} else
|
|
io_p += tlen;
|
|
|
|
data_len -= tlen;
|
|
if ((!data_len) && (length)) {
|
|
data_sg = sg_next(data_sg);
|
|
data_p = sg_virt(data_sg);
|
|
data_len = data_sg->length;
|
|
} else
|
|
data_p += tlen;
|
|
}
|
|
}
|
|
|
|
static int
|
|
fcloop_fcp_op(struct nvmet_fc_target_port *tgtport,
|
|
struct nvmefc_tgt_fcp_req *tgt_fcpreq)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
|
|
struct nvmefc_fcp_req *fcpreq;
|
|
u32 rsplen = 0, xfrlen = 0;
|
|
int fcp_err = 0, active, aborted;
|
|
u8 op = tgt_fcpreq->op;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
fcpreq = tfcp_req->fcpreq;
|
|
active = tfcp_req->active;
|
|
aborted = tfcp_req->aborted;
|
|
tfcp_req->active = true;
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
if (unlikely(active))
|
|
/* illegal - call while i/o active */
|
|
return -EALREADY;
|
|
|
|
if (unlikely(aborted)) {
|
|
/* target transport has aborted i/o prior */
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
tfcp_req->active = false;
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
tgt_fcpreq->transferred_length = 0;
|
|
tgt_fcpreq->fcp_error = -ECANCELED;
|
|
tgt_fcpreq->done(tgt_fcpreq);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* if fcpreq is NULL, the I/O has been aborted (from
|
|
* initiator side). For the target side, act as if all is well
|
|
* but don't actually move data.
|
|
*/
|
|
|
|
switch (op) {
|
|
case NVMET_FCOP_WRITEDATA:
|
|
xfrlen = tgt_fcpreq->transfer_length;
|
|
if (fcpreq) {
|
|
fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
|
|
fcpreq->first_sgl, tgt_fcpreq->offset,
|
|
xfrlen);
|
|
fcpreq->transferred_length += xfrlen;
|
|
}
|
|
break;
|
|
|
|
case NVMET_FCOP_READDATA:
|
|
case NVMET_FCOP_READDATA_RSP:
|
|
xfrlen = tgt_fcpreq->transfer_length;
|
|
if (fcpreq) {
|
|
fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
|
|
fcpreq->first_sgl, tgt_fcpreq->offset,
|
|
xfrlen);
|
|
fcpreq->transferred_length += xfrlen;
|
|
}
|
|
if (op == NVMET_FCOP_READDATA)
|
|
break;
|
|
|
|
/* Fall-Thru to RSP handling */
|
|
fallthrough;
|
|
|
|
case NVMET_FCOP_RSP:
|
|
if (fcpreq) {
|
|
rsplen = ((fcpreq->rsplen < tgt_fcpreq->rsplen) ?
|
|
fcpreq->rsplen : tgt_fcpreq->rsplen);
|
|
memcpy(fcpreq->rspaddr, tgt_fcpreq->rspaddr, rsplen);
|
|
if (rsplen < tgt_fcpreq->rsplen)
|
|
fcp_err = -E2BIG;
|
|
fcpreq->rcv_rsplen = rsplen;
|
|
fcpreq->status = 0;
|
|
}
|
|
tfcp_req->status = 0;
|
|
break;
|
|
|
|
default:
|
|
fcp_err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
tfcp_req->active = false;
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
tgt_fcpreq->transferred_length = xfrlen;
|
|
tgt_fcpreq->fcp_error = fcp_err;
|
|
tgt_fcpreq->done(tgt_fcpreq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
fcloop_tgt_fcp_abort(struct nvmet_fc_target_port *tgtport,
|
|
struct nvmefc_tgt_fcp_req *tgt_fcpreq)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* mark aborted only in case there were 2 threads in transport
|
|
* (one doing io, other doing abort) and only kills ops posted
|
|
* after the abort request
|
|
*/
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
tfcp_req->aborted = true;
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
tfcp_req->status = NVME_SC_INTERNAL;
|
|
|
|
/*
|
|
* nothing more to do. If io wasn't active, the transport should
|
|
* immediately call the req_release. If it was active, the op
|
|
* will complete, and the lldd should call req_release.
|
|
*/
|
|
}
|
|
|
|
static void
|
|
fcloop_fcp_req_release(struct nvmet_fc_target_port *tgtport,
|
|
struct nvmefc_tgt_fcp_req *tgt_fcpreq)
|
|
{
|
|
struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
|
|
|
|
queue_work(nvmet_wq, &tfcp_req->tio_done_work);
|
|
}
|
|
|
|
static void
|
|
fcloop_h2t_ls_abort(struct nvme_fc_local_port *localport,
|
|
struct nvme_fc_remote_port *remoteport,
|
|
struct nvmefc_ls_req *lsreq)
|
|
{
|
|
}
|
|
|
|
static void
|
|
fcloop_t2h_ls_abort(struct nvmet_fc_target_port *targetport,
|
|
void *hosthandle, struct nvmefc_ls_req *lsreq)
|
|
{
|
|
}
|
|
|
|
static void
|
|
fcloop_fcp_abort(struct nvme_fc_local_port *localport,
|
|
struct nvme_fc_remote_port *remoteport,
|
|
void *hw_queue_handle,
|
|
struct nvmefc_fcp_req *fcpreq)
|
|
{
|
|
struct fcloop_ini_fcpreq *inireq = fcpreq->private;
|
|
struct fcloop_fcpreq *tfcp_req;
|
|
bool abortio = true;
|
|
unsigned long flags;
|
|
|
|
spin_lock(&inireq->inilock);
|
|
tfcp_req = inireq->tfcp_req;
|
|
if (tfcp_req)
|
|
fcloop_tfcp_req_get(tfcp_req);
|
|
spin_unlock(&inireq->inilock);
|
|
|
|
if (!tfcp_req)
|
|
/* abort has already been called */
|
|
return;
|
|
|
|
/* break initiator/target relationship for io */
|
|
spin_lock_irqsave(&tfcp_req->reqlock, flags);
|
|
switch (tfcp_req->inistate) {
|
|
case INI_IO_START:
|
|
case INI_IO_ACTIVE:
|
|
tfcp_req->inistate = INI_IO_ABORTED;
|
|
break;
|
|
case INI_IO_COMPLETED:
|
|
abortio = false;
|
|
break;
|
|
default:
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
|
|
|
|
if (abortio)
|
|
/* leave the reference while the work item is scheduled */
|
|
WARN_ON(!queue_work(nvmet_wq, &tfcp_req->abort_rcv_work));
|
|
else {
|
|
/*
|
|
* as the io has already had the done callback made,
|
|
* nothing more to do. So release the reference taken above
|
|
*/
|
|
fcloop_tfcp_req_put(tfcp_req);
|
|
}
|
|
}
|
|
|
|
static void
|
|
fcloop_nport_free(struct kref *ref)
|
|
{
|
|
struct fcloop_nport *nport =
|
|
container_of(ref, struct fcloop_nport, ref);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
list_del(&nport->nport_list);
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
kfree(nport);
|
|
}
|
|
|
|
static void
|
|
fcloop_nport_put(struct fcloop_nport *nport)
|
|
{
|
|
kref_put(&nport->ref, fcloop_nport_free);
|
|
}
|
|
|
|
static int
|
|
fcloop_nport_get(struct fcloop_nport *nport)
|
|
{
|
|
return kref_get_unless_zero(&nport->ref);
|
|
}
|
|
|
|
static void
|
|
fcloop_localport_delete(struct nvme_fc_local_port *localport)
|
|
{
|
|
struct fcloop_lport_priv *lport_priv = localport->private;
|
|
struct fcloop_lport *lport = lport_priv->lport;
|
|
|
|
/* release any threads waiting for the unreg to complete */
|
|
complete(&lport->unreg_done);
|
|
}
|
|
|
|
static void
|
|
fcloop_remoteport_delete(struct nvme_fc_remote_port *remoteport)
|
|
{
|
|
struct fcloop_rport *rport = remoteport->private;
|
|
|
|
flush_work(&rport->ls_work);
|
|
fcloop_nport_put(rport->nport);
|
|
}
|
|
|
|
static void
|
|
fcloop_targetport_delete(struct nvmet_fc_target_port *targetport)
|
|
{
|
|
struct fcloop_tport *tport = targetport->private;
|
|
|
|
flush_work(&tport->ls_work);
|
|
fcloop_nport_put(tport->nport);
|
|
}
|
|
|
|
#define FCLOOP_HW_QUEUES 4
|
|
#define FCLOOP_SGL_SEGS 256
|
|
#define FCLOOP_DMABOUND_4G 0xFFFFFFFF
|
|
|
|
static struct nvme_fc_port_template fctemplate = {
|
|
.localport_delete = fcloop_localport_delete,
|
|
.remoteport_delete = fcloop_remoteport_delete,
|
|
.create_queue = fcloop_create_queue,
|
|
.delete_queue = fcloop_delete_queue,
|
|
.ls_req = fcloop_h2t_ls_req,
|
|
.fcp_io = fcloop_fcp_req,
|
|
.ls_abort = fcloop_h2t_ls_abort,
|
|
.fcp_abort = fcloop_fcp_abort,
|
|
.xmt_ls_rsp = fcloop_t2h_xmt_ls_rsp,
|
|
.max_hw_queues = FCLOOP_HW_QUEUES,
|
|
.max_sgl_segments = FCLOOP_SGL_SEGS,
|
|
.max_dif_sgl_segments = FCLOOP_SGL_SEGS,
|
|
.dma_boundary = FCLOOP_DMABOUND_4G,
|
|
/* sizes of additional private data for data structures */
|
|
.local_priv_sz = sizeof(struct fcloop_lport_priv),
|
|
.remote_priv_sz = sizeof(struct fcloop_rport),
|
|
.lsrqst_priv_sz = sizeof(struct fcloop_lsreq),
|
|
.fcprqst_priv_sz = sizeof(struct fcloop_ini_fcpreq),
|
|
};
|
|
|
|
static struct nvmet_fc_target_template tgttemplate = {
|
|
.targetport_delete = fcloop_targetport_delete,
|
|
.xmt_ls_rsp = fcloop_h2t_xmt_ls_rsp,
|
|
.fcp_op = fcloop_fcp_op,
|
|
.fcp_abort = fcloop_tgt_fcp_abort,
|
|
.fcp_req_release = fcloop_fcp_req_release,
|
|
.discovery_event = fcloop_tgt_discovery_evt,
|
|
.ls_req = fcloop_t2h_ls_req,
|
|
.ls_abort = fcloop_t2h_ls_abort,
|
|
.host_release = fcloop_t2h_host_release,
|
|
.max_hw_queues = FCLOOP_HW_QUEUES,
|
|
.max_sgl_segments = FCLOOP_SGL_SEGS,
|
|
.max_dif_sgl_segments = FCLOOP_SGL_SEGS,
|
|
.dma_boundary = FCLOOP_DMABOUND_4G,
|
|
/* optional features */
|
|
.target_features = 0,
|
|
/* sizes of additional private data for data structures */
|
|
.target_priv_sz = sizeof(struct fcloop_tport),
|
|
.lsrqst_priv_sz = sizeof(struct fcloop_lsreq),
|
|
};
|
|
|
|
static ssize_t
|
|
fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct nvme_fc_port_info pinfo;
|
|
struct fcloop_ctrl_options *opts;
|
|
struct nvme_fc_local_port *localport;
|
|
struct fcloop_lport *lport;
|
|
struct fcloop_lport_priv *lport_priv;
|
|
unsigned long flags;
|
|
int ret = -ENOMEM;
|
|
|
|
lport = kzalloc(sizeof(*lport), GFP_KERNEL);
|
|
if (!lport)
|
|
return -ENOMEM;
|
|
|
|
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
|
|
if (!opts)
|
|
goto out_free_lport;
|
|
|
|
ret = fcloop_parse_options(opts, buf);
|
|
if (ret)
|
|
goto out_free_opts;
|
|
|
|
/* everything there ? */
|
|
if ((opts->mask & LPORT_OPTS) != LPORT_OPTS) {
|
|
ret = -EINVAL;
|
|
goto out_free_opts;
|
|
}
|
|
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
pinfo.node_name = opts->wwnn;
|
|
pinfo.port_name = opts->wwpn;
|
|
pinfo.port_role = opts->roles;
|
|
pinfo.port_id = opts->fcaddr;
|
|
|
|
ret = nvme_fc_register_localport(&pinfo, &fctemplate, NULL, &localport);
|
|
if (!ret) {
|
|
/* success */
|
|
lport_priv = localport->private;
|
|
lport_priv->lport = lport;
|
|
|
|
lport->localport = localport;
|
|
INIT_LIST_HEAD(&lport->lport_list);
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
list_add_tail(&lport->lport_list, &fcloop_lports);
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
}
|
|
|
|
out_free_opts:
|
|
kfree(opts);
|
|
out_free_lport:
|
|
/* free only if we're going to fail */
|
|
if (ret)
|
|
kfree(lport);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
|
|
static void
|
|
__unlink_local_port(struct fcloop_lport *lport)
|
|
{
|
|
list_del(&lport->lport_list);
|
|
}
|
|
|
|
static int
|
|
__wait_localport_unreg(struct fcloop_lport *lport)
|
|
{
|
|
int ret;
|
|
|
|
init_completion(&lport->unreg_done);
|
|
|
|
ret = nvme_fc_unregister_localport(lport->localport);
|
|
|
|
if (!ret)
|
|
wait_for_completion(&lport->unreg_done);
|
|
|
|
kfree(lport);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static ssize_t
|
|
fcloop_delete_local_port(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fcloop_lport *tlport, *lport = NULL;
|
|
u64 nodename, portname;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
|
|
list_for_each_entry(tlport, &fcloop_lports, lport_list) {
|
|
if (tlport->localport->node_name == nodename &&
|
|
tlport->localport->port_name == portname) {
|
|
lport = tlport;
|
|
__unlink_local_port(lport);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
if (!lport)
|
|
return -ENOENT;
|
|
|
|
ret = __wait_localport_unreg(lport);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static struct fcloop_nport *
|
|
fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
|
|
{
|
|
struct fcloop_nport *newnport, *nport = NULL;
|
|
struct fcloop_lport *tmplport, *lport = NULL;
|
|
struct fcloop_ctrl_options *opts;
|
|
unsigned long flags;
|
|
u32 opts_mask = (remoteport) ? RPORT_OPTS : TGTPORT_OPTS;
|
|
int ret;
|
|
|
|
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
|
|
if (!opts)
|
|
return NULL;
|
|
|
|
ret = fcloop_parse_options(opts, buf);
|
|
if (ret)
|
|
goto out_free_opts;
|
|
|
|
/* everything there ? */
|
|
if ((opts->mask & opts_mask) != opts_mask) {
|
|
ret = -EINVAL;
|
|
goto out_free_opts;
|
|
}
|
|
|
|
newnport = kzalloc(sizeof(*newnport), GFP_KERNEL);
|
|
if (!newnport)
|
|
goto out_free_opts;
|
|
|
|
INIT_LIST_HEAD(&newnport->nport_list);
|
|
newnport->node_name = opts->wwnn;
|
|
newnport->port_name = opts->wwpn;
|
|
if (opts->mask & NVMF_OPT_ROLES)
|
|
newnport->port_role = opts->roles;
|
|
if (opts->mask & NVMF_OPT_FCADDR)
|
|
newnport->port_id = opts->fcaddr;
|
|
kref_init(&newnport->ref);
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
|
|
list_for_each_entry(tmplport, &fcloop_lports, lport_list) {
|
|
if (tmplport->localport->node_name == opts->wwnn &&
|
|
tmplport->localport->port_name == opts->wwpn)
|
|
goto out_invalid_opts;
|
|
|
|
if (tmplport->localport->node_name == opts->lpwwnn &&
|
|
tmplport->localport->port_name == opts->lpwwpn)
|
|
lport = tmplport;
|
|
}
|
|
|
|
if (remoteport) {
|
|
if (!lport)
|
|
goto out_invalid_opts;
|
|
newnport->lport = lport;
|
|
}
|
|
|
|
list_for_each_entry(nport, &fcloop_nports, nport_list) {
|
|
if (nport->node_name == opts->wwnn &&
|
|
nport->port_name == opts->wwpn) {
|
|
if ((remoteport && nport->rport) ||
|
|
(!remoteport && nport->tport)) {
|
|
nport = NULL;
|
|
goto out_invalid_opts;
|
|
}
|
|
|
|
fcloop_nport_get(nport);
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
if (remoteport)
|
|
nport->lport = lport;
|
|
if (opts->mask & NVMF_OPT_ROLES)
|
|
nport->port_role = opts->roles;
|
|
if (opts->mask & NVMF_OPT_FCADDR)
|
|
nport->port_id = opts->fcaddr;
|
|
goto out_free_newnport;
|
|
}
|
|
}
|
|
|
|
list_add_tail(&newnport->nport_list, &fcloop_nports);
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
kfree(opts);
|
|
return newnport;
|
|
|
|
out_invalid_opts:
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
out_free_newnport:
|
|
kfree(newnport);
|
|
out_free_opts:
|
|
kfree(opts);
|
|
return nport;
|
|
}
|
|
|
|
static ssize_t
|
|
fcloop_create_remote_port(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct nvme_fc_remote_port *remoteport;
|
|
struct fcloop_nport *nport;
|
|
struct fcloop_rport *rport;
|
|
struct nvme_fc_port_info pinfo;
|
|
int ret;
|
|
|
|
nport = fcloop_alloc_nport(buf, count, true);
|
|
if (!nport)
|
|
return -EIO;
|
|
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
pinfo.node_name = nport->node_name;
|
|
pinfo.port_name = nport->port_name;
|
|
pinfo.port_role = nport->port_role;
|
|
pinfo.port_id = nport->port_id;
|
|
|
|
ret = nvme_fc_register_remoteport(nport->lport->localport,
|
|
&pinfo, &remoteport);
|
|
if (ret || !remoteport) {
|
|
fcloop_nport_put(nport);
|
|
return ret;
|
|
}
|
|
|
|
/* success */
|
|
rport = remoteport->private;
|
|
rport->remoteport = remoteport;
|
|
rport->targetport = (nport->tport) ? nport->tport->targetport : NULL;
|
|
if (nport->tport) {
|
|
nport->tport->remoteport = remoteport;
|
|
nport->tport->lport = nport->lport;
|
|
}
|
|
rport->nport = nport;
|
|
rport->lport = nport->lport;
|
|
nport->rport = rport;
|
|
spin_lock_init(&rport->lock);
|
|
INIT_WORK(&rport->ls_work, fcloop_rport_lsrqst_work);
|
|
INIT_LIST_HEAD(&rport->ls_list);
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
static struct fcloop_rport *
|
|
__unlink_remote_port(struct fcloop_nport *nport)
|
|
{
|
|
struct fcloop_rport *rport = nport->rport;
|
|
|
|
if (rport && nport->tport)
|
|
nport->tport->remoteport = NULL;
|
|
nport->rport = NULL;
|
|
|
|
return rport;
|
|
}
|
|
|
|
static int
|
|
__remoteport_unreg(struct fcloop_nport *nport, struct fcloop_rport *rport)
|
|
{
|
|
if (!rport)
|
|
return -EALREADY;
|
|
|
|
return nvme_fc_unregister_remoteport(rport->remoteport);
|
|
}
|
|
|
|
static ssize_t
|
|
fcloop_delete_remote_port(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fcloop_nport *nport = NULL, *tmpport;
|
|
static struct fcloop_rport *rport;
|
|
u64 nodename, portname;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
|
|
list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
|
|
if (tmpport->node_name == nodename &&
|
|
tmpport->port_name == portname && tmpport->rport) {
|
|
nport = tmpport;
|
|
rport = __unlink_remote_port(nport);
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
if (!nport)
|
|
return -ENOENT;
|
|
|
|
ret = __remoteport_unreg(nport, rport);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static ssize_t
|
|
fcloop_create_target_port(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct nvmet_fc_target_port *targetport;
|
|
struct fcloop_nport *nport;
|
|
struct fcloop_tport *tport;
|
|
struct nvmet_fc_port_info tinfo;
|
|
int ret;
|
|
|
|
nport = fcloop_alloc_nport(buf, count, false);
|
|
if (!nport)
|
|
return -EIO;
|
|
|
|
tinfo.node_name = nport->node_name;
|
|
tinfo.port_name = nport->port_name;
|
|
tinfo.port_id = nport->port_id;
|
|
|
|
ret = nvmet_fc_register_targetport(&tinfo, &tgttemplate, NULL,
|
|
&targetport);
|
|
if (ret) {
|
|
fcloop_nport_put(nport);
|
|
return ret;
|
|
}
|
|
|
|
/* success */
|
|
tport = targetport->private;
|
|
tport->targetport = targetport;
|
|
tport->remoteport = (nport->rport) ? nport->rport->remoteport : NULL;
|
|
if (nport->rport)
|
|
nport->rport->targetport = targetport;
|
|
tport->nport = nport;
|
|
tport->lport = nport->lport;
|
|
nport->tport = tport;
|
|
spin_lock_init(&tport->lock);
|
|
INIT_WORK(&tport->ls_work, fcloop_tport_lsrqst_work);
|
|
INIT_LIST_HEAD(&tport->ls_list);
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
static struct fcloop_tport *
|
|
__unlink_target_port(struct fcloop_nport *nport)
|
|
{
|
|
struct fcloop_tport *tport = nport->tport;
|
|
|
|
if (tport && nport->rport)
|
|
nport->rport->targetport = NULL;
|
|
nport->tport = NULL;
|
|
|
|
return tport;
|
|
}
|
|
|
|
static int
|
|
__targetport_unreg(struct fcloop_nport *nport, struct fcloop_tport *tport)
|
|
{
|
|
if (!tport)
|
|
return -EALREADY;
|
|
|
|
return nvmet_fc_unregister_targetport(tport->targetport);
|
|
}
|
|
|
|
static ssize_t
|
|
fcloop_delete_target_port(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fcloop_nport *nport = NULL, *tmpport;
|
|
struct fcloop_tport *tport = NULL;
|
|
u64 nodename, portname;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
|
|
list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
|
|
if (tmpport->node_name == nodename &&
|
|
tmpport->port_name == portname && tmpport->tport) {
|
|
nport = tmpport;
|
|
tport = __unlink_target_port(nport);
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
if (!nport)
|
|
return -ENOENT;
|
|
|
|
ret = __targetport_unreg(nport, tport);
|
|
|
|
return ret ? ret : count;
|
|
}
|
|
|
|
static ssize_t
|
|
fcloop_set_cmd_drop(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
unsigned int opcode;
|
|
int starting, amount;
|
|
|
|
if (sscanf(buf, "%x:%d:%d", &opcode, &starting, &amount) != 3)
|
|
return -EBADRQC;
|
|
|
|
drop_current_cnt = 0;
|
|
drop_fabric_opcode = (opcode & ~DROP_OPCODE_MASK) ? true : false;
|
|
drop_opcode = (opcode & DROP_OPCODE_MASK);
|
|
drop_instance = starting;
|
|
/* the check to drop routine uses instance + count to know when
|
|
* to end. Thus, if dropping 1 instance, count should be 0.
|
|
* so subtract 1 from the count.
|
|
*/
|
|
drop_amount = amount - 1;
|
|
|
|
pr_info("%s: DROP: Starting at instance %d of%s opcode x%x drop +%d "
|
|
"instances\n",
|
|
__func__, drop_instance, drop_fabric_opcode ? " fabric" : "",
|
|
drop_opcode, drop_amount);
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
static DEVICE_ATTR(add_local_port, 0200, NULL, fcloop_create_local_port);
|
|
static DEVICE_ATTR(del_local_port, 0200, NULL, fcloop_delete_local_port);
|
|
static DEVICE_ATTR(add_remote_port, 0200, NULL, fcloop_create_remote_port);
|
|
static DEVICE_ATTR(del_remote_port, 0200, NULL, fcloop_delete_remote_port);
|
|
static DEVICE_ATTR(add_target_port, 0200, NULL, fcloop_create_target_port);
|
|
static DEVICE_ATTR(del_target_port, 0200, NULL, fcloop_delete_target_port);
|
|
static DEVICE_ATTR(set_cmd_drop, 0200, NULL, fcloop_set_cmd_drop);
|
|
|
|
static struct attribute *fcloop_dev_attrs[] = {
|
|
&dev_attr_add_local_port.attr,
|
|
&dev_attr_del_local_port.attr,
|
|
&dev_attr_add_remote_port.attr,
|
|
&dev_attr_del_remote_port.attr,
|
|
&dev_attr_add_target_port.attr,
|
|
&dev_attr_del_target_port.attr,
|
|
&dev_attr_set_cmd_drop.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group fclopp_dev_attrs_group = {
|
|
.attrs = fcloop_dev_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *fcloop_dev_attr_groups[] = {
|
|
&fclopp_dev_attrs_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct class *fcloop_class;
|
|
static struct device *fcloop_device;
|
|
|
|
|
|
static int __init fcloop_init(void)
|
|
{
|
|
int ret;
|
|
|
|
fcloop_class = class_create("fcloop");
|
|
if (IS_ERR(fcloop_class)) {
|
|
pr_err("couldn't register class fcloop\n");
|
|
ret = PTR_ERR(fcloop_class);
|
|
return ret;
|
|
}
|
|
|
|
fcloop_device = device_create_with_groups(
|
|
fcloop_class, NULL, MKDEV(0, 0), NULL,
|
|
fcloop_dev_attr_groups, "ctl");
|
|
if (IS_ERR(fcloop_device)) {
|
|
pr_err("couldn't create ctl device!\n");
|
|
ret = PTR_ERR(fcloop_device);
|
|
goto out_destroy_class;
|
|
}
|
|
|
|
get_device(fcloop_device);
|
|
|
|
return 0;
|
|
|
|
out_destroy_class:
|
|
class_destroy(fcloop_class);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit fcloop_exit(void)
|
|
{
|
|
struct fcloop_lport *lport = NULL;
|
|
struct fcloop_nport *nport = NULL;
|
|
struct fcloop_tport *tport;
|
|
struct fcloop_rport *rport;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
|
|
for (;;) {
|
|
nport = list_first_entry_or_null(&fcloop_nports,
|
|
typeof(*nport), nport_list);
|
|
if (!nport)
|
|
break;
|
|
|
|
tport = __unlink_target_port(nport);
|
|
rport = __unlink_remote_port(nport);
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
ret = __targetport_unreg(nport, tport);
|
|
if (ret)
|
|
pr_warn("%s: Failed deleting target port\n", __func__);
|
|
|
|
ret = __remoteport_unreg(nport, rport);
|
|
if (ret)
|
|
pr_warn("%s: Failed deleting remote port\n", __func__);
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
}
|
|
|
|
for (;;) {
|
|
lport = list_first_entry_or_null(&fcloop_lports,
|
|
typeof(*lport), lport_list);
|
|
if (!lport)
|
|
break;
|
|
|
|
__unlink_local_port(lport);
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
ret = __wait_localport_unreg(lport);
|
|
if (ret)
|
|
pr_warn("%s: Failed deleting local port\n", __func__);
|
|
|
|
spin_lock_irqsave(&fcloop_lock, flags);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&fcloop_lock, flags);
|
|
|
|
put_device(fcloop_device);
|
|
|
|
device_destroy(fcloop_class, MKDEV(0, 0));
|
|
class_destroy(fcloop_class);
|
|
}
|
|
|
|
module_init(fcloop_init);
|
|
module_exit(fcloop_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|