blob: 913cd2ec7a6f618db7a274dd234f335c263bdba0 [file] [log] [blame]
Christoph Hellwiga4b74fc2019-02-18 11:35:19 +01001// SPDX-License-Identifier: GPL-2.0
James Smart475d0fe2016-12-02 00:28:44 -08002/*
3 * Copyright (c) 2016 Avago Technologies. All rights reserved.
James Smart475d0fe2016-12-02 00:28:44 -08004 */
5#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6#include <linux/module.h>
7#include <linux/parser.h>
8#include <uapi/scsi/fc/fc_fs.h>
9
10#include "../host/nvme.h"
11#include "../target/nvmet.h"
12#include <linux/nvme-fc-driver.h>
13#include <linux/nvme-fc.h>
14
15
16enum {
17 NVMF_OPT_ERR = 0,
18 NVMF_OPT_WWNN = 1 << 0,
19 NVMF_OPT_WWPN = 1 << 1,
20 NVMF_OPT_ROLES = 1 << 2,
21 NVMF_OPT_FCADDR = 1 << 3,
22 NVMF_OPT_LPWWNN = 1 << 4,
23 NVMF_OPT_LPWWPN = 1 << 5,
24};
25
26struct fcloop_ctrl_options {
27 int mask;
28 u64 wwnn;
29 u64 wwpn;
30 u32 roles;
31 u32 fcaddr;
32 u64 lpwwnn;
33 u64 lpwwpn;
34};
35
36static const match_table_t opt_tokens = {
37 { NVMF_OPT_WWNN, "wwnn=%s" },
38 { NVMF_OPT_WWPN, "wwpn=%s" },
39 { NVMF_OPT_ROLES, "roles=%d" },
40 { NVMF_OPT_FCADDR, "fcaddr=%x" },
41 { NVMF_OPT_LPWWNN, "lpwwnn=%s" },
42 { NVMF_OPT_LPWWPN, "lpwwpn=%s" },
43 { NVMF_OPT_ERR, NULL }
44};
45
Dongli Zhangca8f4be2020-05-25 21:21:18 -070046static int fcloop_verify_addr(substring_t *s)
47{
48 size_t blen = s->to - s->from + 1;
49
50 if (strnlen(s->from, blen) != NVME_FC_TRADDR_HEXNAMELEN + 2 ||
51 strncmp(s->from, "0x", 2))
52 return -EINVAL;
53
54 return 0;
55}
56
James Smart475d0fe2016-12-02 00:28:44 -080057static int
58fcloop_parse_options(struct fcloop_ctrl_options *opts,
59 const char *buf)
60{
61 substring_t args[MAX_OPT_ARGS];
62 char *options, *o, *p;
63 int token, ret = 0;
64 u64 token64;
65
66 options = o = kstrdup(buf, GFP_KERNEL);
67 if (!options)
68 return -ENOMEM;
69
70 while ((p = strsep(&o, ",\n")) != NULL) {
71 if (!*p)
72 continue;
73
74 token = match_token(p, opt_tokens, args);
75 opts->mask |= token;
76 switch (token) {
77 case NVMF_OPT_WWNN:
Dongli Zhangca8f4be2020-05-25 21:21:18 -070078 if (fcloop_verify_addr(args) ||
79 match_u64(args, &token64)) {
James Smart475d0fe2016-12-02 00:28:44 -080080 ret = -EINVAL;
81 goto out_free_options;
82 }
83 opts->wwnn = token64;
84 break;
85 case NVMF_OPT_WWPN:
Dongli Zhangca8f4be2020-05-25 21:21:18 -070086 if (fcloop_verify_addr(args) ||
87 match_u64(args, &token64)) {
James Smart475d0fe2016-12-02 00:28:44 -080088 ret = -EINVAL;
89 goto out_free_options;
90 }
91 opts->wwpn = token64;
92 break;
93 case NVMF_OPT_ROLES:
94 if (match_int(args, &token)) {
95 ret = -EINVAL;
96 goto out_free_options;
97 }
98 opts->roles = token;
99 break;
100 case NVMF_OPT_FCADDR:
101 if (match_hex(args, &token)) {
102 ret = -EINVAL;
103 goto out_free_options;
104 }
105 opts->fcaddr = token;
106 break;
107 case NVMF_OPT_LPWWNN:
Dongli Zhangca8f4be2020-05-25 21:21:18 -0700108 if (fcloop_verify_addr(args) ||
109 match_u64(args, &token64)) {
James Smart475d0fe2016-12-02 00:28:44 -0800110 ret = -EINVAL;
111 goto out_free_options;
112 }
113 opts->lpwwnn = token64;
114 break;
115 case NVMF_OPT_LPWWPN:
Dongli Zhangca8f4be2020-05-25 21:21:18 -0700116 if (fcloop_verify_addr(args) ||
117 match_u64(args, &token64)) {
James Smart475d0fe2016-12-02 00:28:44 -0800118 ret = -EINVAL;
119 goto out_free_options;
120 }
121 opts->lpwwpn = token64;
122 break;
123 default:
124 pr_warn("unknown parameter or missing value '%s'\n", p);
125 ret = -EINVAL;
126 goto out_free_options;
127 }
128 }
129
130out_free_options:
131 kfree(options);
132 return ret;
133}
134
135
136static int
137fcloop_parse_nm_options(struct device *dev, u64 *nname, u64 *pname,
138 const char *buf)
139{
140 substring_t args[MAX_OPT_ARGS];
141 char *options, *o, *p;
142 int token, ret = 0;
143 u64 token64;
144
145 *nname = -1;
146 *pname = -1;
147
148 options = o = kstrdup(buf, GFP_KERNEL);
149 if (!options)
150 return -ENOMEM;
151
152 while ((p = strsep(&o, ",\n")) != NULL) {
153 if (!*p)
154 continue;
155
156 token = match_token(p, opt_tokens, args);
157 switch (token) {
158 case NVMF_OPT_WWNN:
Dongli Zhangca8f4be2020-05-25 21:21:18 -0700159 if (fcloop_verify_addr(args) ||
160 match_u64(args, &token64)) {
James Smart475d0fe2016-12-02 00:28:44 -0800161 ret = -EINVAL;
162 goto out_free_options;
163 }
164 *nname = token64;
165 break;
166 case NVMF_OPT_WWPN:
Dongli Zhangca8f4be2020-05-25 21:21:18 -0700167 if (fcloop_verify_addr(args) ||
168 match_u64(args, &token64)) {
James Smart475d0fe2016-12-02 00:28:44 -0800169 ret = -EINVAL;
170 goto out_free_options;
171 }
172 *pname = token64;
173 break;
174 default:
175 pr_warn("unknown parameter or missing value '%s'\n", p);
176 ret = -EINVAL;
177 goto out_free_options;
178 }
179 }
180
181out_free_options:
182 kfree(options);
183
184 if (!ret) {
185 if (*nname == -1)
186 return -EINVAL;
187 if (*pname == -1)
188 return -EINVAL;
189 }
190
191 return ret;
192}
193
194
195#define LPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN)
196
197#define RPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN | \
198 NVMF_OPT_LPWWNN | NVMF_OPT_LPWWPN)
199
200#define TGTPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN)
201
James Smart475d0fe2016-12-02 00:28:44 -0800202
203static DEFINE_SPINLOCK(fcloop_lock);
204static LIST_HEAD(fcloop_lports);
205static LIST_HEAD(fcloop_nports);
206
207struct fcloop_lport {
208 struct nvme_fc_local_port *localport;
209 struct list_head lport_list;
210 struct completion unreg_done;
211};
212
James Smart6fda2022017-11-29 16:47:31 -0800213struct fcloop_lport_priv {
214 struct fcloop_lport *lport;
215};
216
James Smart475d0fe2016-12-02 00:28:44 -0800217struct fcloop_rport {
James Smart38803fc2020-03-18 14:41:12 -0700218 struct nvme_fc_remote_port *remoteport;
219 struct nvmet_fc_target_port *targetport;
220 struct fcloop_nport *nport;
221 struct fcloop_lport *lport;
222 spinlock_t lock;
223 struct list_head ls_list;
224 struct work_struct ls_work;
James Smart475d0fe2016-12-02 00:28:44 -0800225};
226
227struct fcloop_tport {
James Smart437c0b82020-03-31 09:50:01 -0700228 struct nvmet_fc_target_port *targetport;
229 struct nvme_fc_remote_port *remoteport;
230 struct fcloop_nport *nport;
231 struct fcloop_lport *lport;
232 spinlock_t lock;
233 struct list_head ls_list;
234 struct work_struct ls_work;
James Smart475d0fe2016-12-02 00:28:44 -0800235};
236
237struct fcloop_nport {
238 struct fcloop_rport *rport;
239 struct fcloop_tport *tport;
240 struct fcloop_lport *lport;
241 struct list_head nport_list;
242 struct kref ref;
James Smart475d0fe2016-12-02 00:28:44 -0800243 u64 node_name;
244 u64 port_name;
245 u32 port_role;
246 u32 port_id;
247};
248
249struct fcloop_lsreq {
James Smart475d0fe2016-12-02 00:28:44 -0800250 struct nvmefc_ls_req *lsreq;
James Smart72e63292020-03-31 09:49:47 -0700251 struct nvmefc_ls_rsp ls_rsp;
James Smartea397652020-03-31 09:50:00 -0700252 int lsdir; /* H2T or T2H */
James Smart475d0fe2016-12-02 00:28:44 -0800253 int status;
James Smart38803fc2020-03-18 14:41:12 -0700254 struct list_head ls_list; /* fcloop_rport->ls_list */
James Smart475d0fe2016-12-02 00:28:44 -0800255};
256
James Smart4cf7c362019-05-14 14:58:04 -0700257struct fcloop_rscn {
258 struct fcloop_tport *tport;
259 struct work_struct work;
260};
261
James Smartb6f80772017-11-29 16:47:33 -0800262enum {
263 INI_IO_START = 0,
264 INI_IO_ACTIVE = 1,
265 INI_IO_ABORTED = 2,
266 INI_IO_COMPLETED = 3,
267};
268
James Smart475d0fe2016-12-02 00:28:44 -0800269struct fcloop_fcpreq {
270 struct fcloop_tport *tport;
271 struct nvmefc_fcp_req *fcpreq;
James Smarta97ec51b2017-04-11 11:32:31 -0700272 spinlock_t reqlock;
James Smart475d0fe2016-12-02 00:28:44 -0800273 u16 status;
James Smartb6f80772017-11-29 16:47:33 -0800274 u32 inistate;
James Smarta97ec51b2017-04-11 11:32:31 -0700275 bool active;
276 bool aborted;
James Smartb6f80772017-11-29 16:47:33 -0800277 struct kref ref;
James Smart24431d62017-11-29 16:47:32 -0800278 struct work_struct fcp_rcv_work;
279 struct work_struct abort_rcv_work;
280 struct work_struct tio_done_work;
James Smart475d0fe2016-12-02 00:28:44 -0800281 struct nvmefc_tgt_fcp_req tgt_fcp_req;
282};
283
James Smartce79bfc2017-04-11 11:32:30 -0700284struct fcloop_ini_fcpreq {
285 struct nvmefc_fcp_req *fcpreq;
286 struct fcloop_fcpreq *tfcp_req;
James Smartb6f80772017-11-29 16:47:33 -0800287 spinlock_t inilock;
James Smartce79bfc2017-04-11 11:32:30 -0700288};
James Smart475d0fe2016-12-02 00:28:44 -0800289
290static inline struct fcloop_lsreq *
James Smart72e63292020-03-31 09:49:47 -0700291ls_rsp_to_lsreq(struct nvmefc_ls_rsp *lsrsp)
James Smart475d0fe2016-12-02 00:28:44 -0800292{
James Smart72e63292020-03-31 09:49:47 -0700293 return container_of(lsrsp, struct fcloop_lsreq, ls_rsp);
James Smart475d0fe2016-12-02 00:28:44 -0800294}
295
296static inline struct fcloop_fcpreq *
297tgt_fcp_req_to_fcpreq(struct nvmefc_tgt_fcp_req *tgt_fcpreq)
298{
299 return container_of(tgt_fcpreq, struct fcloop_fcpreq, tgt_fcp_req);
300}
301
302
303static int
304fcloop_create_queue(struct nvme_fc_local_port *localport,
305 unsigned int qidx, u16 qsize,
306 void **handle)
307{
308 *handle = localport;
309 return 0;
310}
311
312static void
313fcloop_delete_queue(struct nvme_fc_local_port *localport,
314 unsigned int idx, void *handle)
315{
316}
317
James Smart475d0fe2016-12-02 00:28:44 -0800318static void
James Smart38803fc2020-03-18 14:41:12 -0700319fcloop_rport_lsrqst_work(struct work_struct *work)
James Smart475d0fe2016-12-02 00:28:44 -0800320{
James Smart38803fc2020-03-18 14:41:12 -0700321 struct fcloop_rport *rport =
322 container_of(work, struct fcloop_rport, ls_work);
323 struct fcloop_lsreq *tls_req;
James Smart475d0fe2016-12-02 00:28:44 -0800324
James Smart38803fc2020-03-18 14:41:12 -0700325 spin_lock(&rport->lock);
326 for (;;) {
327 tls_req = list_first_entry_or_null(&rport->ls_list,
328 struct fcloop_lsreq, ls_list);
329 if (!tls_req)
330 break;
331
332 list_del(&tls_req->ls_list);
333 spin_unlock(&rport->lock);
334
335 tls_req->lsreq->done(tls_req->lsreq, tls_req->status);
336 /*
337 * callee may free memory containing tls_req.
338 * do not reference lsreq after this.
339 */
340
341 spin_lock(&rport->lock);
342 }
343 spin_unlock(&rport->lock);
James Smart475d0fe2016-12-02 00:28:44 -0800344}
345
346static int
James Smartea397652020-03-31 09:50:00 -0700347fcloop_h2t_ls_req(struct nvme_fc_local_port *localport,
James Smart475d0fe2016-12-02 00:28:44 -0800348 struct nvme_fc_remote_port *remoteport,
349 struct nvmefc_ls_req *lsreq)
350{
351 struct fcloop_lsreq *tls_req = lsreq->private;
352 struct fcloop_rport *rport = remoteport->private;
353 int ret = 0;
354
355 tls_req->lsreq = lsreq;
James Smart38803fc2020-03-18 14:41:12 -0700356 INIT_LIST_HEAD(&tls_req->ls_list);
James Smart475d0fe2016-12-02 00:28:44 -0800357
358 if (!rport->targetport) {
359 tls_req->status = -ECONNREFUSED;
James Smart38803fc2020-03-18 14:41:12 -0700360 spin_lock(&rport->lock);
Daniel Wagnerdcfad4a2024-01-31 09:51:02 +0100361 list_add_tail(&tls_req->ls_list, &rport->ls_list);
James Smart38803fc2020-03-18 14:41:12 -0700362 spin_unlock(&rport->lock);
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200363 queue_work(nvmet_wq, &rport->ls_work);
James Smart475d0fe2016-12-02 00:28:44 -0800364 return ret;
365 }
366
367 tls_req->status = 0;
James Smart437c0b82020-03-31 09:50:01 -0700368 ret = nvmet_fc_rcv_ls_req(rport->targetport, rport,
369 &tls_req->ls_rsp,
370 lsreq->rqstaddr, lsreq->rqstlen);
James Smart475d0fe2016-12-02 00:28:44 -0800371
372 return ret;
373}
374
375static int
James Smartea397652020-03-31 09:50:00 -0700376fcloop_h2t_xmt_ls_rsp(struct nvmet_fc_target_port *targetport,
James Smart72e63292020-03-31 09:49:47 -0700377 struct nvmefc_ls_rsp *lsrsp)
James Smart475d0fe2016-12-02 00:28:44 -0800378{
James Smart72e63292020-03-31 09:49:47 -0700379 struct fcloop_lsreq *tls_req = ls_rsp_to_lsreq(lsrsp);
James Smart475d0fe2016-12-02 00:28:44 -0800380 struct nvmefc_ls_req *lsreq = tls_req->lsreq;
James Smart38803fc2020-03-18 14:41:12 -0700381 struct fcloop_tport *tport = targetport->private;
382 struct nvme_fc_remote_port *remoteport = tport->remoteport;
383 struct fcloop_rport *rport;
James Smart475d0fe2016-12-02 00:28:44 -0800384
James Smart72e63292020-03-31 09:49:47 -0700385 memcpy(lsreq->rspaddr, lsrsp->rspbuf,
386 ((lsreq->rsplen < lsrsp->rsplen) ?
387 lsreq->rsplen : lsrsp->rsplen));
James Smart38803fc2020-03-18 14:41:12 -0700388
James Smart72e63292020-03-31 09:49:47 -0700389 lsrsp->done(lsrsp);
James Smart475d0fe2016-12-02 00:28:44 -0800390
James Smart38803fc2020-03-18 14:41:12 -0700391 if (remoteport) {
392 rport = remoteport->private;
393 spin_lock(&rport->lock);
Daniel Wagnerdcfad4a2024-01-31 09:51:02 +0100394 list_add_tail(&tls_req->ls_list, &rport->ls_list);
James Smart38803fc2020-03-18 14:41:12 -0700395 spin_unlock(&rport->lock);
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200396 queue_work(nvmet_wq, &rport->ls_work);
James Smart38803fc2020-03-18 14:41:12 -0700397 }
James Smart475d0fe2016-12-02 00:28:44 -0800398
399 return 0;
400}
401
James Smart437c0b82020-03-31 09:50:01 -0700402static void
403fcloop_tport_lsrqst_work(struct work_struct *work)
404{
405 struct fcloop_tport *tport =
406 container_of(work, struct fcloop_tport, ls_work);
407 struct fcloop_lsreq *tls_req;
408
409 spin_lock(&tport->lock);
410 for (;;) {
411 tls_req = list_first_entry_or_null(&tport->ls_list,
412 struct fcloop_lsreq, ls_list);
413 if (!tls_req)
414 break;
415
416 list_del(&tls_req->ls_list);
417 spin_unlock(&tport->lock);
418
419 tls_req->lsreq->done(tls_req->lsreq, tls_req->status);
420 /*
421 * callee may free memory containing tls_req.
422 * do not reference lsreq after this.
423 */
424
425 spin_lock(&tport->lock);
426 }
427 spin_unlock(&tport->lock);
428}
429
430static int
431fcloop_t2h_ls_req(struct nvmet_fc_target_port *targetport, void *hosthandle,
432 struct nvmefc_ls_req *lsreq)
433{
434 struct fcloop_lsreq *tls_req = lsreq->private;
435 struct fcloop_tport *tport = targetport->private;
436 int ret = 0;
437
438 /*
439 * hosthandle should be the dst.rport value.
440 * hosthandle ignored as fcloop currently is
441 * 1:1 tgtport vs remoteport
442 */
443 tls_req->lsreq = lsreq;
444 INIT_LIST_HEAD(&tls_req->ls_list);
445
446 if (!tport->remoteport) {
447 tls_req->status = -ECONNREFUSED;
448 spin_lock(&tport->lock);
Daniel Wagnerdcfad4a2024-01-31 09:51:02 +0100449 list_add_tail(&tls_req->ls_list, &tport->ls_list);
James Smart437c0b82020-03-31 09:50:01 -0700450 spin_unlock(&tport->lock);
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200451 queue_work(nvmet_wq, &tport->ls_work);
James Smart437c0b82020-03-31 09:50:01 -0700452 return ret;
453 }
454
455 tls_req->status = 0;
456 ret = nvme_fc_rcv_ls_req(tport->remoteport, &tls_req->ls_rsp,
457 lsreq->rqstaddr, lsreq->rqstlen);
458
459 return ret;
460}
461
462static int
463fcloop_t2h_xmt_ls_rsp(struct nvme_fc_local_port *localport,
464 struct nvme_fc_remote_port *remoteport,
465 struct nvmefc_ls_rsp *lsrsp)
466{
467 struct fcloop_lsreq *tls_req = ls_rsp_to_lsreq(lsrsp);
468 struct nvmefc_ls_req *lsreq = tls_req->lsreq;
469 struct fcloop_rport *rport = remoteport->private;
470 struct nvmet_fc_target_port *targetport = rport->targetport;
471 struct fcloop_tport *tport;
472
473 memcpy(lsreq->rspaddr, lsrsp->rspbuf,
474 ((lsreq->rsplen < lsrsp->rsplen) ?
475 lsreq->rsplen : lsrsp->rsplen));
476 lsrsp->done(lsrsp);
477
478 if (targetport) {
479 tport = targetport->private;
480 spin_lock(&tport->lock);
481 list_add_tail(&tport->ls_list, &tls_req->ls_list);
482 spin_unlock(&tport->lock);
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200483 queue_work(nvmet_wq, &tport->ls_work);
James Smart437c0b82020-03-31 09:50:01 -0700484 }
485
486 return 0;
487}
488
489static void
490fcloop_t2h_host_release(void *hosthandle)
491{
492 /* host handle ignored for now */
493}
494
James Smart4cf7c362019-05-14 14:58:04 -0700495/*
496 * Simulate reception of RSCN and converting it to a initiator transport
497 * call to rescan a remote port.
498 */
499static void
500fcloop_tgt_rscn_work(struct work_struct *work)
501{
502 struct fcloop_rscn *tgt_rscn =
503 container_of(work, struct fcloop_rscn, work);
504 struct fcloop_tport *tport = tgt_rscn->tport;
505
506 if (tport->remoteport)
507 nvme_fc_rescan_remoteport(tport->remoteport);
508 kfree(tgt_rscn);
509}
510
511static void
512fcloop_tgt_discovery_evt(struct nvmet_fc_target_port *tgtport)
513{
514 struct fcloop_rscn *tgt_rscn;
515
516 tgt_rscn = kzalloc(sizeof(*tgt_rscn), GFP_KERNEL);
517 if (!tgt_rscn)
518 return;
519
520 tgt_rscn->tport = tgtport->private;
521 INIT_WORK(&tgt_rscn->work, fcloop_tgt_rscn_work);
522
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200523 queue_work(nvmet_wq, &tgt_rscn->work);
James Smart4cf7c362019-05-14 14:58:04 -0700524}
525
James Smarta97ec51b2017-04-11 11:32:31 -0700526static void
James Smartb6f80772017-11-29 16:47:33 -0800527fcloop_tfcp_req_free(struct kref *ref)
James Smarta97ec51b2017-04-11 11:32:31 -0700528{
James Smart24431d62017-11-29 16:47:32 -0800529 struct fcloop_fcpreq *tfcp_req =
James Smartb6f80772017-11-29 16:47:33 -0800530 container_of(ref, struct fcloop_fcpreq, ref);
James Smarta97ec51b2017-04-11 11:32:31 -0700531
James Smartb6f80772017-11-29 16:47:33 -0800532 kfree(tfcp_req);
533}
James Smart24431d62017-11-29 16:47:32 -0800534
James Smartb6f80772017-11-29 16:47:33 -0800535static void
536fcloop_tfcp_req_put(struct fcloop_fcpreq *tfcp_req)
537{
538 kref_put(&tfcp_req->ref, fcloop_tfcp_req_free);
539}
540
541static int
542fcloop_tfcp_req_get(struct fcloop_fcpreq *tfcp_req)
543{
544 return kref_get_unless_zero(&tfcp_req->ref);
James Smart24431d62017-11-29 16:47:32 -0800545}
546
547static void
548fcloop_call_host_done(struct nvmefc_fcp_req *fcpreq,
549 struct fcloop_fcpreq *tfcp_req, int status)
550{
551 struct fcloop_ini_fcpreq *inireq = NULL;
552
553 if (fcpreq) {
554 inireq = fcpreq->private;
James Smartb6f80772017-11-29 16:47:33 -0800555 spin_lock(&inireq->inilock);
James Smart24431d62017-11-29 16:47:32 -0800556 inireq->tfcp_req = NULL;
James Smartb6f80772017-11-29 16:47:33 -0800557 spin_unlock(&inireq->inilock);
James Smart24431d62017-11-29 16:47:32 -0800558
559 fcpreq->status = status;
560 fcpreq->done(fcpreq);
561 }
James Smartb6f80772017-11-29 16:47:33 -0800562
563 /* release original io reference on tgt struct */
564 fcloop_tfcp_req_put(tfcp_req);
565}
566
James Smart03d99e52020-10-16 14:28:38 -0700567static bool drop_fabric_opcode;
568#define DROP_OPCODE_MASK 0x00FF
569/* fabrics opcode will have a bit set above 1st byte */
570static int drop_opcode = -1;
571static int drop_instance;
572static int drop_amount;
573static int drop_current_cnt;
574
575/*
576 * Routine to parse io and determine if the io is to be dropped.
577 * Returns:
578 * 0 if io is not obstructed
579 * 1 if io was dropped
580 */
581static int check_for_drop(struct fcloop_fcpreq *tfcp_req)
582{
583 struct nvmefc_fcp_req *fcpreq = tfcp_req->fcpreq;
584 struct nvme_fc_cmd_iu *cmdiu = fcpreq->cmdaddr;
585 struct nvme_command *sqe = &cmdiu->sqe;
586
587 if (drop_opcode == -1)
588 return 0;
589
590 pr_info("%s: seq opcd x%02x fctype x%02x: drop F %s op x%02x "
591 "inst %d start %d amt %d\n",
592 __func__, sqe->common.opcode, sqe->fabrics.fctype,
593 drop_fabric_opcode ? "y" : "n",
594 drop_opcode, drop_current_cnt, drop_instance, drop_amount);
595
596 if ((drop_fabric_opcode &&
597 (sqe->common.opcode != nvme_fabrics_command ||
598 sqe->fabrics.fctype != drop_opcode)) ||
599 (!drop_fabric_opcode && sqe->common.opcode != drop_opcode))
600 return 0;
601
602 if (++drop_current_cnt >= drop_instance) {
603 if (drop_current_cnt >= drop_instance + drop_amount)
604 drop_opcode = -1;
605 return 1;
606 }
607
608 return 0;
609}
610
James Smartb6f80772017-11-29 16:47:33 -0800611static void
612fcloop_fcp_recv_work(struct work_struct *work)
613{
614 struct fcloop_fcpreq *tfcp_req =
615 container_of(work, struct fcloop_fcpreq, fcp_rcv_work);
616 struct nvmefc_fcp_req *fcpreq = tfcp_req->fcpreq;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800617 unsigned long flags;
James Smartb6f80772017-11-29 16:47:33 -0800618 int ret = 0;
619 bool aborted = false;
620
Ming Lei4f86a6f2023-04-12 16:49:04 +0800621 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800622 switch (tfcp_req->inistate) {
623 case INI_IO_START:
624 tfcp_req->inistate = INI_IO_ACTIVE;
625 break;
626 case INI_IO_ABORTED:
627 aborted = true;
628 break;
629 default:
Ming Lei4f86a6f2023-04-12 16:49:04 +0800630 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800631 WARN_ON(1);
632 return;
633 }
Ming Lei4f86a6f2023-04-12 16:49:04 +0800634 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800635
636 if (unlikely(aborted))
637 ret = -ECANCELED;
James Smart03d99e52020-10-16 14:28:38 -0700638 else {
639 if (likely(!check_for_drop(tfcp_req)))
640 ret = nvmet_fc_rcv_fcp_req(tfcp_req->tport->targetport,
James Smartb6f80772017-11-29 16:47:33 -0800641 &tfcp_req->tgt_fcp_req,
642 fcpreq->cmdaddr, fcpreq->cmdlen);
James Smart03d99e52020-10-16 14:28:38 -0700643 else
644 pr_info("%s: dropped command ********\n", __func__);
645 }
James Smartb6f80772017-11-29 16:47:33 -0800646 if (ret)
647 fcloop_call_host_done(fcpreq, tfcp_req, ret);
James Smart24431d62017-11-29 16:47:32 -0800648}
649
650static void
651fcloop_fcp_abort_recv_work(struct work_struct *work)
652{
653 struct fcloop_fcpreq *tfcp_req =
654 container_of(work, struct fcloop_fcpreq, abort_rcv_work);
James Smartb6f80772017-11-29 16:47:33 -0800655 struct nvmefc_fcp_req *fcpreq;
656 bool completed = false;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800657 unsigned long flags;
James Smartb6f80772017-11-29 16:47:33 -0800658
Ming Lei4f86a6f2023-04-12 16:49:04 +0800659 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800660 fcpreq = tfcp_req->fcpreq;
661 switch (tfcp_req->inistate) {
662 case INI_IO_ABORTED:
663 break;
664 case INI_IO_COMPLETED:
665 completed = true;
666 break;
667 default:
Ming Lei4f86a6f2023-04-12 16:49:04 +0800668 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800669 WARN_ON(1);
670 return;
671 }
Ming Lei4f86a6f2023-04-12 16:49:04 +0800672 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800673
674 if (unlikely(completed)) {
675 /* remove reference taken in original abort downcall */
676 fcloop_tfcp_req_put(tfcp_req);
677 return;
678 }
James Smart24431d62017-11-29 16:47:32 -0800679
680 if (tfcp_req->tport->targetport)
681 nvmet_fc_rcv_fcp_abort(tfcp_req->tport->targetport,
682 &tfcp_req->tgt_fcp_req);
683
Ming Lei4f86a6f2023-04-12 16:49:04 +0800684 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smart24431d62017-11-29 16:47:32 -0800685 tfcp_req->fcpreq = NULL;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800686 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smart24431d62017-11-29 16:47:32 -0800687
688 fcloop_call_host_done(fcpreq, tfcp_req, -ECANCELED);
James Smartb6f80772017-11-29 16:47:33 -0800689 /* call_host_done releases reference for abort downcall */
James Smarta97ec51b2017-04-11 11:32:31 -0700690}
691
692/*
693 * FCP IO operation done by target completion.
694 * call back up initiator "done" flows.
James Smart475d0fe2016-12-02 00:28:44 -0800695 */
696static void
697fcloop_tgt_fcprqst_done_work(struct work_struct *work)
698{
699 struct fcloop_fcpreq *tfcp_req =
James Smart24431d62017-11-29 16:47:32 -0800700 container_of(work, struct fcloop_fcpreq, tio_done_work);
James Smarta97ec51b2017-04-11 11:32:31 -0700701 struct nvmefc_fcp_req *fcpreq;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800702 unsigned long flags;
James Smart475d0fe2016-12-02 00:28:44 -0800703
Ming Lei4f86a6f2023-04-12 16:49:04 +0800704 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700705 fcpreq = tfcp_req->fcpreq;
James Smartb6f80772017-11-29 16:47:33 -0800706 tfcp_req->inistate = INI_IO_COMPLETED;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800707 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700708
James Smart24431d62017-11-29 16:47:32 -0800709 fcloop_call_host_done(fcpreq, tfcp_req, tfcp_req->status);
James Smart475d0fe2016-12-02 00:28:44 -0800710}
711
712
713static int
714fcloop_fcp_req(struct nvme_fc_local_port *localport,
715 struct nvme_fc_remote_port *remoteport,
716 void *hw_queue_handle,
717 struct nvmefc_fcp_req *fcpreq)
718{
James Smart475d0fe2016-12-02 00:28:44 -0800719 struct fcloop_rport *rport = remoteport->private;
James Smartce79bfc2017-04-11 11:32:30 -0700720 struct fcloop_ini_fcpreq *inireq = fcpreq->private;
721 struct fcloop_fcpreq *tfcp_req;
James Smart475d0fe2016-12-02 00:28:44 -0800722
James Smartce79bfc2017-04-11 11:32:30 -0700723 if (!rport->targetport)
724 return -ECONNREFUSED;
James Smart475d0fe2016-12-02 00:28:44 -0800725
James Smarte0620bf2019-06-20 13:17:01 -0700726 tfcp_req = kzalloc(sizeof(*tfcp_req), GFP_ATOMIC);
James Smartce79bfc2017-04-11 11:32:30 -0700727 if (!tfcp_req)
728 return -ENOMEM;
James Smart475d0fe2016-12-02 00:28:44 -0800729
James Smartce79bfc2017-04-11 11:32:30 -0700730 inireq->fcpreq = fcpreq;
731 inireq->tfcp_req = tfcp_req;
James Smartb6f80772017-11-29 16:47:33 -0800732 spin_lock_init(&inireq->inilock);
733
James Smart475d0fe2016-12-02 00:28:44 -0800734 tfcp_req->fcpreq = fcpreq;
735 tfcp_req->tport = rport->targetport->private;
James Smartb6f80772017-11-29 16:47:33 -0800736 tfcp_req->inistate = INI_IO_START;
James Smarta97ec51b2017-04-11 11:32:31 -0700737 spin_lock_init(&tfcp_req->reqlock);
James Smart24431d62017-11-29 16:47:32 -0800738 INIT_WORK(&tfcp_req->fcp_rcv_work, fcloop_fcp_recv_work);
739 INIT_WORK(&tfcp_req->abort_rcv_work, fcloop_fcp_abort_recv_work);
740 INIT_WORK(&tfcp_req->tio_done_work, fcloop_tgt_fcprqst_done_work);
James Smartb6f80772017-11-29 16:47:33 -0800741 kref_init(&tfcp_req->ref);
James Smart475d0fe2016-12-02 00:28:44 -0800742
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200743 queue_work(nvmet_wq, &tfcp_req->fcp_rcv_work);
James Smart475d0fe2016-12-02 00:28:44 -0800744
James Smart24431d62017-11-29 16:47:32 -0800745 return 0;
James Smart475d0fe2016-12-02 00:28:44 -0800746}
747
748static void
749fcloop_fcp_copy_data(u8 op, struct scatterlist *data_sg,
750 struct scatterlist *io_sg, u32 offset, u32 length)
751{
752 void *data_p, *io_p;
753 u32 data_len, io_len, tlen;
754
755 io_p = sg_virt(io_sg);
756 io_len = io_sg->length;
757
758 for ( ; offset; ) {
759 tlen = min_t(u32, offset, io_len);
760 offset -= tlen;
761 io_len -= tlen;
762 if (!io_len) {
763 io_sg = sg_next(io_sg);
764 io_p = sg_virt(io_sg);
765 io_len = io_sg->length;
766 } else
767 io_p += tlen;
768 }
769
770 data_p = sg_virt(data_sg);
771 data_len = data_sg->length;
772
773 for ( ; length; ) {
774 tlen = min_t(u32, io_len, data_len);
775 tlen = min_t(u32, tlen, length);
776
777 if (op == NVMET_FCOP_WRITEDATA)
778 memcpy(data_p, io_p, tlen);
779 else
780 memcpy(io_p, data_p, tlen);
781
782 length -= tlen;
783
784 io_len -= tlen;
785 if ((!io_len) && (length)) {
786 io_sg = sg_next(io_sg);
787 io_p = sg_virt(io_sg);
788 io_len = io_sg->length;
789 } else
790 io_p += tlen;
791
792 data_len -= tlen;
793 if ((!data_len) && (length)) {
794 data_sg = sg_next(data_sg);
795 data_p = sg_virt(data_sg);
796 data_len = data_sg->length;
797 } else
798 data_p += tlen;
799 }
800}
801
802static int
803fcloop_fcp_op(struct nvmet_fc_target_port *tgtport,
804 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
805{
806 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
James Smarta97ec51b2017-04-11 11:32:31 -0700807 struct nvmefc_fcp_req *fcpreq;
James Smart475d0fe2016-12-02 00:28:44 -0800808 u32 rsplen = 0, xfrlen = 0;
James Smarta97ec51b2017-04-11 11:32:31 -0700809 int fcp_err = 0, active, aborted;
James Smart475d0fe2016-12-02 00:28:44 -0800810 u8 op = tgt_fcpreq->op;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800811 unsigned long flags;
James Smart475d0fe2016-12-02 00:28:44 -0800812
Ming Lei4f86a6f2023-04-12 16:49:04 +0800813 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700814 fcpreq = tfcp_req->fcpreq;
815 active = tfcp_req->active;
816 aborted = tfcp_req->aborted;
817 tfcp_req->active = true;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800818 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700819
820 if (unlikely(active))
821 /* illegal - call while i/o active */
822 return -EALREADY;
823
824 if (unlikely(aborted)) {
825 /* target transport has aborted i/o prior */
Ming Lei4f86a6f2023-04-12 16:49:04 +0800826 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700827 tfcp_req->active = false;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800828 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700829 tgt_fcpreq->transferred_length = 0;
830 tgt_fcpreq->fcp_error = -ECANCELED;
831 tgt_fcpreq->done(tgt_fcpreq);
832 return 0;
833 }
834
835 /*
836 * if fcpreq is NULL, the I/O has been aborted (from
837 * initiator side). For the target side, act as if all is well
838 * but don't actually move data.
839 */
840
James Smart475d0fe2016-12-02 00:28:44 -0800841 switch (op) {
842 case NVMET_FCOP_WRITEDATA:
843 xfrlen = tgt_fcpreq->transfer_length;
James Smarta97ec51b2017-04-11 11:32:31 -0700844 if (fcpreq) {
845 fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
846 fcpreq->first_sgl, tgt_fcpreq->offset,
847 xfrlen);
848 fcpreq->transferred_length += xfrlen;
849 }
James Smart475d0fe2016-12-02 00:28:44 -0800850 break;
851
852 case NVMET_FCOP_READDATA:
853 case NVMET_FCOP_READDATA_RSP:
854 xfrlen = tgt_fcpreq->transfer_length;
James Smarta97ec51b2017-04-11 11:32:31 -0700855 if (fcpreq) {
856 fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
857 fcpreq->first_sgl, tgt_fcpreq->offset,
858 xfrlen);
859 fcpreq->transferred_length += xfrlen;
860 }
James Smart475d0fe2016-12-02 00:28:44 -0800861 if (op == NVMET_FCOP_READDATA)
862 break;
863
864 /* Fall-Thru to RSP handling */
Gustavo A. R. Silvadf561f662020-08-23 17:36:59 -0500865 fallthrough;
James Smart475d0fe2016-12-02 00:28:44 -0800866
867 case NVMET_FCOP_RSP:
James Smarta97ec51b2017-04-11 11:32:31 -0700868 if (fcpreq) {
869 rsplen = ((fcpreq->rsplen < tgt_fcpreq->rsplen) ?
870 fcpreq->rsplen : tgt_fcpreq->rsplen);
871 memcpy(fcpreq->rspaddr, tgt_fcpreq->rspaddr, rsplen);
872 if (rsplen < tgt_fcpreq->rsplen)
873 fcp_err = -E2BIG;
874 fcpreq->rcv_rsplen = rsplen;
875 fcpreq->status = 0;
876 }
James Smart475d0fe2016-12-02 00:28:44 -0800877 tfcp_req->status = 0;
878 break;
879
James Smart475d0fe2016-12-02 00:28:44 -0800880 default:
881 fcp_err = -EINVAL;
882 break;
883 }
884
Ming Lei4f86a6f2023-04-12 16:49:04 +0800885 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700886 tfcp_req->active = false;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800887 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700888
James Smart475d0fe2016-12-02 00:28:44 -0800889 tgt_fcpreq->transferred_length = xfrlen;
890 tgt_fcpreq->fcp_error = fcp_err;
891 tgt_fcpreq->done(tgt_fcpreq);
892
James Smart475d0fe2016-12-02 00:28:44 -0800893 return 0;
894}
895
896static void
James Smarta97ec51b2017-04-11 11:32:31 -0700897fcloop_tgt_fcp_abort(struct nvmet_fc_target_port *tgtport,
898 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
899{
900 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
Ming Lei4f86a6f2023-04-12 16:49:04 +0800901 unsigned long flags;
James Smarta97ec51b2017-04-11 11:32:31 -0700902
903 /*
904 * mark aborted only in case there were 2 threads in transport
905 * (one doing io, other doing abort) and only kills ops posted
906 * after the abort request
907 */
Ming Lei4f86a6f2023-04-12 16:49:04 +0800908 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700909 tfcp_req->aborted = true;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800910 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700911
James Smartfc9608e2017-09-07 16:27:28 -0700912 tfcp_req->status = NVME_SC_INTERNAL;
James Smarta97ec51b2017-04-11 11:32:31 -0700913
914 /*
915 * nothing more to do. If io wasn't active, the transport should
916 * immediately call the req_release. If it was active, the op
917 * will complete, and the lldd should call req_release.
918 */
919}
920
921static void
James Smart19b58d92017-04-11 11:32:29 -0700922fcloop_fcp_req_release(struct nvmet_fc_target_port *tgtport,
923 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
924{
925 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
926
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200927 queue_work(nvmet_wq, &tfcp_req->tio_done_work);
James Smart19b58d92017-04-11 11:32:29 -0700928}
929
930static void
James Smartea397652020-03-31 09:50:00 -0700931fcloop_h2t_ls_abort(struct nvme_fc_local_port *localport,
James Smart475d0fe2016-12-02 00:28:44 -0800932 struct nvme_fc_remote_port *remoteport,
933 struct nvmefc_ls_req *lsreq)
934{
935}
936
937static void
James Smart437c0b82020-03-31 09:50:01 -0700938fcloop_t2h_ls_abort(struct nvmet_fc_target_port *targetport,
939 void *hosthandle, struct nvmefc_ls_req *lsreq)
940{
941}
942
943static void
James Smart475d0fe2016-12-02 00:28:44 -0800944fcloop_fcp_abort(struct nvme_fc_local_port *localport,
945 struct nvme_fc_remote_port *remoteport,
946 void *hw_queue_handle,
947 struct nvmefc_fcp_req *fcpreq)
948{
James Smarta97ec51b2017-04-11 11:32:31 -0700949 struct fcloop_ini_fcpreq *inireq = fcpreq->private;
James Smartb6f80772017-11-29 16:47:33 -0800950 struct fcloop_fcpreq *tfcp_req;
951 bool abortio = true;
Ming Lei4f86a6f2023-04-12 16:49:04 +0800952 unsigned long flags;
James Smartb6f80772017-11-29 16:47:33 -0800953
954 spin_lock(&inireq->inilock);
955 tfcp_req = inireq->tfcp_req;
956 if (tfcp_req)
957 fcloop_tfcp_req_get(tfcp_req);
958 spin_unlock(&inireq->inilock);
James Smarta97ec51b2017-04-11 11:32:31 -0700959
960 if (!tfcp_req)
961 /* abort has already been called */
962 return;
963
James Smarta97ec51b2017-04-11 11:32:31 -0700964 /* break initiator/target relationship for io */
Ming Lei4f86a6f2023-04-12 16:49:04 +0800965 spin_lock_irqsave(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800966 switch (tfcp_req->inistate) {
967 case INI_IO_START:
968 case INI_IO_ACTIVE:
969 tfcp_req->inistate = INI_IO_ABORTED;
970 break;
971 case INI_IO_COMPLETED:
972 abortio = false;
973 break;
974 default:
Ming Lei4f86a6f2023-04-12 16:49:04 +0800975 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smartb6f80772017-11-29 16:47:33 -0800976 WARN_ON(1);
977 return;
978 }
Ming Lei4f86a6f2023-04-12 16:49:04 +0800979 spin_unlock_irqrestore(&tfcp_req->reqlock, flags);
James Smarta97ec51b2017-04-11 11:32:31 -0700980
James Smartb6f80772017-11-29 16:47:33 -0800981 if (abortio)
982 /* leave the reference while the work item is scheduled */
Sagi Grimberg8832cf92022-03-21 13:57:27 +0200983 WARN_ON(!queue_work(nvmet_wq, &tfcp_req->abort_rcv_work));
James Smartb6f80772017-11-29 16:47:33 -0800984 else {
985 /*
986 * as the io has already had the done callback made,
987 * nothing more to do. So release the reference taken above
988 */
989 fcloop_tfcp_req_put(tfcp_req);
990 }
James Smart475d0fe2016-12-02 00:28:44 -0800991}
992
993static void
James Smartfddc9922017-09-19 14:01:50 -0700994fcloop_nport_free(struct kref *ref)
995{
996 struct fcloop_nport *nport =
997 container_of(ref, struct fcloop_nport, ref);
James Smartfddc9922017-09-19 14:01:50 -0700998
999 kfree(nport);
1000}
1001
1002static void
1003fcloop_nport_put(struct fcloop_nport *nport)
1004{
1005 kref_put(&nport->ref, fcloop_nport_free);
1006}
1007
1008static int
1009fcloop_nport_get(struct fcloop_nport *nport)
1010{
1011 return kref_get_unless_zero(&nport->ref);
1012}
1013
1014static void
James Smart475d0fe2016-12-02 00:28:44 -08001015fcloop_localport_delete(struct nvme_fc_local_port *localport)
1016{
James Smart6fda2022017-11-29 16:47:31 -08001017 struct fcloop_lport_priv *lport_priv = localport->private;
1018 struct fcloop_lport *lport = lport_priv->lport;
James Smart475d0fe2016-12-02 00:28:44 -08001019
1020 /* release any threads waiting for the unreg to complete */
1021 complete(&lport->unreg_done);
1022}
1023
1024static void
1025fcloop_remoteport_delete(struct nvme_fc_remote_port *remoteport)
1026{
1027 struct fcloop_rport *rport = remoteport->private;
1028
James Smart38803fc2020-03-18 14:41:12 -07001029 flush_work(&rport->ls_work);
James Smartfddc9922017-09-19 14:01:50 -07001030 fcloop_nport_put(rport->nport);
James Smart475d0fe2016-12-02 00:28:44 -08001031}
1032
1033static void
1034fcloop_targetport_delete(struct nvmet_fc_target_port *targetport)
1035{
1036 struct fcloop_tport *tport = targetport->private;
1037
James Smart437c0b82020-03-31 09:50:01 -07001038 flush_work(&tport->ls_work);
James Smartfddc9922017-09-19 14:01:50 -07001039 fcloop_nport_put(tport->nport);
James Smart475d0fe2016-12-02 00:28:44 -08001040}
1041
1042#define FCLOOP_HW_QUEUES 4
1043#define FCLOOP_SGL_SEGS 256
1044#define FCLOOP_DMABOUND_4G 0xFFFFFFFF
1045
Christoph Hellwig36b88902017-04-21 10:37:25 +02001046static struct nvme_fc_port_template fctemplate = {
James Smart475d0fe2016-12-02 00:28:44 -08001047 .localport_delete = fcloop_localport_delete,
1048 .remoteport_delete = fcloop_remoteport_delete,
1049 .create_queue = fcloop_create_queue,
1050 .delete_queue = fcloop_delete_queue,
James Smartea397652020-03-31 09:50:00 -07001051 .ls_req = fcloop_h2t_ls_req,
James Smart475d0fe2016-12-02 00:28:44 -08001052 .fcp_io = fcloop_fcp_req,
James Smartea397652020-03-31 09:50:00 -07001053 .ls_abort = fcloop_h2t_ls_abort,
James Smart475d0fe2016-12-02 00:28:44 -08001054 .fcp_abort = fcloop_fcp_abort,
James Smart437c0b82020-03-31 09:50:01 -07001055 .xmt_ls_rsp = fcloop_t2h_xmt_ls_rsp,
James Smart475d0fe2016-12-02 00:28:44 -08001056 .max_hw_queues = FCLOOP_HW_QUEUES,
1057 .max_sgl_segments = FCLOOP_SGL_SEGS,
1058 .max_dif_sgl_segments = FCLOOP_SGL_SEGS,
1059 .dma_boundary = FCLOOP_DMABOUND_4G,
1060 /* sizes of additional private data for data structures */
James Smart6fda2022017-11-29 16:47:31 -08001061 .local_priv_sz = sizeof(struct fcloop_lport_priv),
James Smart475d0fe2016-12-02 00:28:44 -08001062 .remote_priv_sz = sizeof(struct fcloop_rport),
1063 .lsrqst_priv_sz = sizeof(struct fcloop_lsreq),
James Smartce79bfc2017-04-11 11:32:30 -07001064 .fcprqst_priv_sz = sizeof(struct fcloop_ini_fcpreq),
James Smart475d0fe2016-12-02 00:28:44 -08001065};
1066
Christoph Hellwig36b88902017-04-21 10:37:25 +02001067static struct nvmet_fc_target_template tgttemplate = {
James Smart475d0fe2016-12-02 00:28:44 -08001068 .targetport_delete = fcloop_targetport_delete,
James Smartea397652020-03-31 09:50:00 -07001069 .xmt_ls_rsp = fcloop_h2t_xmt_ls_rsp,
James Smart475d0fe2016-12-02 00:28:44 -08001070 .fcp_op = fcloop_fcp_op,
James Smarta97ec51b2017-04-11 11:32:31 -07001071 .fcp_abort = fcloop_tgt_fcp_abort,
James Smart19b58d92017-04-11 11:32:29 -07001072 .fcp_req_release = fcloop_fcp_req_release,
James Smart4cf7c362019-05-14 14:58:04 -07001073 .discovery_event = fcloop_tgt_discovery_evt,
James Smart437c0b82020-03-31 09:50:01 -07001074 .ls_req = fcloop_t2h_ls_req,
1075 .ls_abort = fcloop_t2h_ls_abort,
1076 .host_release = fcloop_t2h_host_release,
James Smart475d0fe2016-12-02 00:28:44 -08001077 .max_hw_queues = FCLOOP_HW_QUEUES,
1078 .max_sgl_segments = FCLOOP_SGL_SEGS,
1079 .max_dif_sgl_segments = FCLOOP_SGL_SEGS,
1080 .dma_boundary = FCLOOP_DMABOUND_4G,
1081 /* optional features */
James Smart24431d62017-11-29 16:47:32 -08001082 .target_features = 0,
James Smart475d0fe2016-12-02 00:28:44 -08001083 /* sizes of additional private data for data structures */
1084 .target_priv_sz = sizeof(struct fcloop_tport),
James Smart437c0b82020-03-31 09:50:01 -07001085 .lsrqst_priv_sz = sizeof(struct fcloop_lsreq),
James Smart475d0fe2016-12-02 00:28:44 -08001086};
1087
1088static ssize_t
1089fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
1090 const char *buf, size_t count)
1091{
1092 struct nvme_fc_port_info pinfo;
1093 struct fcloop_ctrl_options *opts;
1094 struct nvme_fc_local_port *localport;
1095 struct fcloop_lport *lport;
James Smart6fda2022017-11-29 16:47:31 -08001096 struct fcloop_lport_priv *lport_priv;
1097 unsigned long flags;
1098 int ret = -ENOMEM;
1099
1100 lport = kzalloc(sizeof(*lport), GFP_KERNEL);
1101 if (!lport)
1102 return -ENOMEM;
James Smart475d0fe2016-12-02 00:28:44 -08001103
1104 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
1105 if (!opts)
James Smart6fda2022017-11-29 16:47:31 -08001106 goto out_free_lport;
James Smart475d0fe2016-12-02 00:28:44 -08001107
1108 ret = fcloop_parse_options(opts, buf);
1109 if (ret)
1110 goto out_free_opts;
1111
1112 /* everything there ? */
1113 if ((opts->mask & LPORT_OPTS) != LPORT_OPTS) {
1114 ret = -EINVAL;
1115 goto out_free_opts;
1116 }
1117
James Smartfddc9922017-09-19 14:01:50 -07001118 memset(&pinfo, 0, sizeof(pinfo));
James Smart475d0fe2016-12-02 00:28:44 -08001119 pinfo.node_name = opts->wwnn;
1120 pinfo.port_name = opts->wwpn;
1121 pinfo.port_role = opts->roles;
1122 pinfo.port_id = opts->fcaddr;
1123
1124 ret = nvme_fc_register_localport(&pinfo, &fctemplate, NULL, &localport);
1125 if (!ret) {
James Smart475d0fe2016-12-02 00:28:44 -08001126 /* success */
James Smart6fda2022017-11-29 16:47:31 -08001127 lport_priv = localport->private;
1128 lport_priv->lport = lport;
1129
James Smart475d0fe2016-12-02 00:28:44 -08001130 lport->localport = localport;
1131 INIT_LIST_HEAD(&lport->lport_list);
1132
1133 spin_lock_irqsave(&fcloop_lock, flags);
1134 list_add_tail(&lport->lport_list, &fcloop_lports);
1135 spin_unlock_irqrestore(&fcloop_lock, flags);
James Smart475d0fe2016-12-02 00:28:44 -08001136 }
1137
1138out_free_opts:
1139 kfree(opts);
James Smart6fda2022017-11-29 16:47:31 -08001140out_free_lport:
1141 /* free only if we're going to fail */
1142 if (ret)
1143 kfree(lport);
1144
James Smart475d0fe2016-12-02 00:28:44 -08001145 return ret ? ret : count;
1146}
1147
1148
1149static void
1150__unlink_local_port(struct fcloop_lport *lport)
1151{
1152 list_del(&lport->lport_list);
1153}
1154
1155static int
1156__wait_localport_unreg(struct fcloop_lport *lport)
1157{
1158 int ret;
1159
1160 init_completion(&lport->unreg_done);
1161
1162 ret = nvme_fc_unregister_localport(lport->localport);
1163
Daniel Wagnerd97b4112023-06-06 14:24:11 +02001164 if (!ret)
1165 wait_for_completion(&lport->unreg_done);
James Smart475d0fe2016-12-02 00:28:44 -08001166
James Smart6fda2022017-11-29 16:47:31 -08001167 kfree(lport);
1168
James Smart475d0fe2016-12-02 00:28:44 -08001169 return ret;
1170}
1171
1172
1173static ssize_t
1174fcloop_delete_local_port(struct device *dev, struct device_attribute *attr,
1175 const char *buf, size_t count)
1176{
1177 struct fcloop_lport *tlport, *lport = NULL;
1178 u64 nodename, portname;
1179 unsigned long flags;
1180 int ret;
1181
1182 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1183 if (ret)
1184 return ret;
1185
1186 spin_lock_irqsave(&fcloop_lock, flags);
1187
1188 list_for_each_entry(tlport, &fcloop_lports, lport_list) {
1189 if (tlport->localport->node_name == nodename &&
1190 tlport->localport->port_name == portname) {
1191 lport = tlport;
1192 __unlink_local_port(lport);
1193 break;
1194 }
1195 }
1196 spin_unlock_irqrestore(&fcloop_lock, flags);
1197
1198 if (!lport)
1199 return -ENOENT;
1200
1201 ret = __wait_localport_unreg(lport);
1202
1203 return ret ? ret : count;
1204}
1205
James Smart475d0fe2016-12-02 00:28:44 -08001206static struct fcloop_nport *
1207fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
1208{
1209 struct fcloop_nport *newnport, *nport = NULL;
1210 struct fcloop_lport *tmplport, *lport = NULL;
1211 struct fcloop_ctrl_options *opts;
1212 unsigned long flags;
1213 u32 opts_mask = (remoteport) ? RPORT_OPTS : TGTPORT_OPTS;
1214 int ret;
1215
1216 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
1217 if (!opts)
1218 return NULL;
1219
1220 ret = fcloop_parse_options(opts, buf);
1221 if (ret)
1222 goto out_free_opts;
1223
1224 /* everything there ? */
1225 if ((opts->mask & opts_mask) != opts_mask) {
1226 ret = -EINVAL;
1227 goto out_free_opts;
1228 }
1229
1230 newnport = kzalloc(sizeof(*newnport), GFP_KERNEL);
1231 if (!newnport)
1232 goto out_free_opts;
1233
1234 INIT_LIST_HEAD(&newnport->nport_list);
1235 newnport->node_name = opts->wwnn;
1236 newnport->port_name = opts->wwpn;
1237 if (opts->mask & NVMF_OPT_ROLES)
1238 newnport->port_role = opts->roles;
1239 if (opts->mask & NVMF_OPT_FCADDR)
1240 newnport->port_id = opts->fcaddr;
1241 kref_init(&newnport->ref);
1242
1243 spin_lock_irqsave(&fcloop_lock, flags);
1244
1245 list_for_each_entry(tmplport, &fcloop_lports, lport_list) {
1246 if (tmplport->localport->node_name == opts->wwnn &&
1247 tmplport->localport->port_name == opts->wwpn)
1248 goto out_invalid_opts;
1249
1250 if (tmplport->localport->node_name == opts->lpwwnn &&
1251 tmplport->localport->port_name == opts->lpwwpn)
1252 lport = tmplport;
1253 }
1254
1255 if (remoteport) {
1256 if (!lport)
1257 goto out_invalid_opts;
1258 newnport->lport = lport;
1259 }
1260
1261 list_for_each_entry(nport, &fcloop_nports, nport_list) {
1262 if (nport->node_name == opts->wwnn &&
1263 nport->port_name == opts->wwpn) {
1264 if ((remoteport && nport->rport) ||
1265 (!remoteport && nport->tport)) {
1266 nport = NULL;
1267 goto out_invalid_opts;
1268 }
1269
1270 fcloop_nport_get(nport);
1271
1272 spin_unlock_irqrestore(&fcloop_lock, flags);
1273
1274 if (remoteport)
1275 nport->lport = lport;
1276 if (opts->mask & NVMF_OPT_ROLES)
1277 nport->port_role = opts->roles;
1278 if (opts->mask & NVMF_OPT_FCADDR)
1279 nport->port_id = opts->fcaddr;
1280 goto out_free_newnport;
1281 }
1282 }
1283
1284 list_add_tail(&newnport->nport_list, &fcloop_nports);
1285
1286 spin_unlock_irqrestore(&fcloop_lock, flags);
1287
1288 kfree(opts);
1289 return newnport;
1290
1291out_invalid_opts:
1292 spin_unlock_irqrestore(&fcloop_lock, flags);
1293out_free_newnport:
1294 kfree(newnport);
1295out_free_opts:
1296 kfree(opts);
1297 return nport;
1298}
1299
1300static ssize_t
1301fcloop_create_remote_port(struct device *dev, struct device_attribute *attr,
1302 const char *buf, size_t count)
1303{
1304 struct nvme_fc_remote_port *remoteport;
1305 struct fcloop_nport *nport;
1306 struct fcloop_rport *rport;
1307 struct nvme_fc_port_info pinfo;
1308 int ret;
1309
1310 nport = fcloop_alloc_nport(buf, count, true);
1311 if (!nport)
1312 return -EIO;
1313
James Smartfddc9922017-09-19 14:01:50 -07001314 memset(&pinfo, 0, sizeof(pinfo));
James Smart475d0fe2016-12-02 00:28:44 -08001315 pinfo.node_name = nport->node_name;
1316 pinfo.port_name = nport->port_name;
1317 pinfo.port_role = nport->port_role;
1318 pinfo.port_id = nport->port_id;
1319
1320 ret = nvme_fc_register_remoteport(nport->lport->localport,
1321 &pinfo, &remoteport);
1322 if (ret || !remoteport) {
1323 fcloop_nport_put(nport);
1324 return ret;
1325 }
1326
1327 /* success */
1328 rport = remoteport->private;
1329 rport->remoteport = remoteport;
1330 rport->targetport = (nport->tport) ? nport->tport->targetport : NULL;
1331 if (nport->tport) {
1332 nport->tport->remoteport = remoteport;
1333 nport->tport->lport = nport->lport;
1334 }
1335 rport->nport = nport;
1336 rport->lport = nport->lport;
1337 nport->rport = rport;
James Smart38803fc2020-03-18 14:41:12 -07001338 spin_lock_init(&rport->lock);
1339 INIT_WORK(&rport->ls_work, fcloop_rport_lsrqst_work);
1340 INIT_LIST_HEAD(&rport->ls_list);
James Smart475d0fe2016-12-02 00:28:44 -08001341
Colin Ian King7c3a23b2016-12-09 14:59:47 +00001342 return count;
James Smart475d0fe2016-12-02 00:28:44 -08001343}
1344
1345
1346static struct fcloop_rport *
1347__unlink_remote_port(struct fcloop_nport *nport)
1348{
1349 struct fcloop_rport *rport = nport->rport;
1350
1351 if (rport && nport->tport)
1352 nport->tport->remoteport = NULL;
1353 nport->rport = NULL;
1354
Daniel Wagnerf644d212023-12-18 16:30:53 +01001355 list_del(&nport->nport_list);
1356
James Smart475d0fe2016-12-02 00:28:44 -08001357 return rport;
1358}
1359
1360static int
James Smartfddc9922017-09-19 14:01:50 -07001361__remoteport_unreg(struct fcloop_nport *nport, struct fcloop_rport *rport)
James Smart475d0fe2016-12-02 00:28:44 -08001362{
James Smart475d0fe2016-12-02 00:28:44 -08001363 if (!rport)
1364 return -EALREADY;
1365
James Smartfddc9922017-09-19 14:01:50 -07001366 return nvme_fc_unregister_remoteport(rport->remoteport);
James Smart475d0fe2016-12-02 00:28:44 -08001367}
1368
1369static ssize_t
1370fcloop_delete_remote_port(struct device *dev, struct device_attribute *attr,
1371 const char *buf, size_t count)
1372{
1373 struct fcloop_nport *nport = NULL, *tmpport;
1374 static struct fcloop_rport *rport;
1375 u64 nodename, portname;
1376 unsigned long flags;
1377 int ret;
1378
1379 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1380 if (ret)
1381 return ret;
1382
1383 spin_lock_irqsave(&fcloop_lock, flags);
1384
1385 list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
1386 if (tmpport->node_name == nodename &&
1387 tmpport->port_name == portname && tmpport->rport) {
1388 nport = tmpport;
1389 rport = __unlink_remote_port(nport);
1390 break;
1391 }
1392 }
1393
1394 spin_unlock_irqrestore(&fcloop_lock, flags);
1395
1396 if (!nport)
1397 return -ENOENT;
1398
James Smartfddc9922017-09-19 14:01:50 -07001399 ret = __remoteport_unreg(nport, rport);
James Smart475d0fe2016-12-02 00:28:44 -08001400
1401 return ret ? ret : count;
1402}
1403
1404static ssize_t
1405fcloop_create_target_port(struct device *dev, struct device_attribute *attr,
1406 const char *buf, size_t count)
1407{
1408 struct nvmet_fc_target_port *targetport;
1409 struct fcloop_nport *nport;
1410 struct fcloop_tport *tport;
1411 struct nvmet_fc_port_info tinfo;
1412 int ret;
1413
1414 nport = fcloop_alloc_nport(buf, count, false);
1415 if (!nport)
1416 return -EIO;
1417
1418 tinfo.node_name = nport->node_name;
1419 tinfo.port_name = nport->port_name;
1420 tinfo.port_id = nport->port_id;
1421
1422 ret = nvmet_fc_register_targetport(&tinfo, &tgttemplate, NULL,
1423 &targetport);
1424 if (ret) {
1425 fcloop_nport_put(nport);
1426 return ret;
1427 }
1428
1429 /* success */
1430 tport = targetport->private;
1431 tport->targetport = targetport;
1432 tport->remoteport = (nport->rport) ? nport->rport->remoteport : NULL;
1433 if (nport->rport)
1434 nport->rport->targetport = targetport;
1435 tport->nport = nport;
1436 tport->lport = nport->lport;
1437 nport->tport = tport;
James Smart437c0b82020-03-31 09:50:01 -07001438 spin_lock_init(&tport->lock);
1439 INIT_WORK(&tport->ls_work, fcloop_tport_lsrqst_work);
1440 INIT_LIST_HEAD(&tport->ls_list);
James Smart475d0fe2016-12-02 00:28:44 -08001441
Colin Ian King7c3a23b2016-12-09 14:59:47 +00001442 return count;
James Smart475d0fe2016-12-02 00:28:44 -08001443}
1444
1445
1446static struct fcloop_tport *
1447__unlink_target_port(struct fcloop_nport *nport)
1448{
1449 struct fcloop_tport *tport = nport->tport;
1450
1451 if (tport && nport->rport)
1452 nport->rport->targetport = NULL;
1453 nport->tport = NULL;
1454
1455 return tport;
1456}
1457
1458static int
James Smartfddc9922017-09-19 14:01:50 -07001459__targetport_unreg(struct fcloop_nport *nport, struct fcloop_tport *tport)
James Smart475d0fe2016-12-02 00:28:44 -08001460{
James Smart475d0fe2016-12-02 00:28:44 -08001461 if (!tport)
1462 return -EALREADY;
1463
James Smartfddc9922017-09-19 14:01:50 -07001464 return nvmet_fc_unregister_targetport(tport->targetport);
James Smart475d0fe2016-12-02 00:28:44 -08001465}
1466
1467static ssize_t
1468fcloop_delete_target_port(struct device *dev, struct device_attribute *attr,
1469 const char *buf, size_t count)
1470{
1471 struct fcloop_nport *nport = NULL, *tmpport;
James Smart254beb82017-12-21 14:15:47 -08001472 struct fcloop_tport *tport = NULL;
James Smart475d0fe2016-12-02 00:28:44 -08001473 u64 nodename, portname;
1474 unsigned long flags;
1475 int ret;
1476
1477 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1478 if (ret)
1479 return ret;
1480
1481 spin_lock_irqsave(&fcloop_lock, flags);
1482
1483 list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
1484 if (tmpport->node_name == nodename &&
1485 tmpport->port_name == portname && tmpport->tport) {
1486 nport = tmpport;
1487 tport = __unlink_target_port(nport);
1488 break;
1489 }
1490 }
1491
1492 spin_unlock_irqrestore(&fcloop_lock, flags);
1493
1494 if (!nport)
1495 return -ENOENT;
1496
James Smartfddc9922017-09-19 14:01:50 -07001497 ret = __targetport_unreg(nport, tport);
James Smart475d0fe2016-12-02 00:28:44 -08001498
1499 return ret ? ret : count;
1500}
1501
James Smart03d99e52020-10-16 14:28:38 -07001502static ssize_t
1503fcloop_set_cmd_drop(struct device *dev, struct device_attribute *attr,
1504 const char *buf, size_t count)
1505{
James Smart2b54996b72020-12-07 12:29:40 -08001506 unsigned int opcode;
1507 int starting, amount;
James Smart03d99e52020-10-16 14:28:38 -07001508
1509 if (sscanf(buf, "%x:%d:%d", &opcode, &starting, &amount) != 3)
1510 return -EBADRQC;
1511
1512 drop_current_cnt = 0;
1513 drop_fabric_opcode = (opcode & ~DROP_OPCODE_MASK) ? true : false;
1514 drop_opcode = (opcode & DROP_OPCODE_MASK);
1515 drop_instance = starting;
1516 /* the check to drop routine uses instance + count to know when
1517 * to end. Thus, if dropping 1 instance, count should be 0.
1518 * so subtract 1 from the count.
1519 */
1520 drop_amount = amount - 1;
1521
1522 pr_info("%s: DROP: Starting at instance %d of%s opcode x%x drop +%d "
1523 "instances\n",
1524 __func__, drop_instance, drop_fabric_opcode ? " fabric" : "",
1525 drop_opcode, drop_amount);
1526
1527 return count;
1528}
1529
James Smart475d0fe2016-12-02 00:28:44 -08001530
1531static DEVICE_ATTR(add_local_port, 0200, NULL, fcloop_create_local_port);
1532static DEVICE_ATTR(del_local_port, 0200, NULL, fcloop_delete_local_port);
1533static DEVICE_ATTR(add_remote_port, 0200, NULL, fcloop_create_remote_port);
1534static DEVICE_ATTR(del_remote_port, 0200, NULL, fcloop_delete_remote_port);
1535static DEVICE_ATTR(add_target_port, 0200, NULL, fcloop_create_target_port);
1536static DEVICE_ATTR(del_target_port, 0200, NULL, fcloop_delete_target_port);
James Smart03d99e52020-10-16 14:28:38 -07001537static DEVICE_ATTR(set_cmd_drop, 0200, NULL, fcloop_set_cmd_drop);
James Smart475d0fe2016-12-02 00:28:44 -08001538
1539static struct attribute *fcloop_dev_attrs[] = {
1540 &dev_attr_add_local_port.attr,
1541 &dev_attr_del_local_port.attr,
1542 &dev_attr_add_remote_port.attr,
1543 &dev_attr_del_remote_port.attr,
1544 &dev_attr_add_target_port.attr,
1545 &dev_attr_del_target_port.attr,
James Smart03d99e52020-10-16 14:28:38 -07001546 &dev_attr_set_cmd_drop.attr,
James Smart475d0fe2016-12-02 00:28:44 -08001547 NULL
1548};
1549
Rikard Falkeborn60b152a2021-01-09 00:41:47 +01001550static const struct attribute_group fclopp_dev_attrs_group = {
James Smart475d0fe2016-12-02 00:28:44 -08001551 .attrs = fcloop_dev_attrs,
1552};
1553
1554static const struct attribute_group *fcloop_dev_attr_groups[] = {
1555 &fclopp_dev_attrs_group,
1556 NULL,
1557};
1558
Ricardo B. Marliere800bb2b2024-03-05 10:15:58 -03001559static const struct class fcloop_class = {
1560 .name = "fcloop",
1561};
James Smart475d0fe2016-12-02 00:28:44 -08001562static struct device *fcloop_device;
1563
1564
1565static int __init fcloop_init(void)
1566{
1567 int ret;
1568
Ricardo B. Marliere800bb2b2024-03-05 10:15:58 -03001569 ret = class_register(&fcloop_class);
1570 if (ret) {
James Smart475d0fe2016-12-02 00:28:44 -08001571 pr_err("couldn't register class fcloop\n");
James Smart475d0fe2016-12-02 00:28:44 -08001572 return ret;
1573 }
1574
1575 fcloop_device = device_create_with_groups(
Ricardo B. Marliere800bb2b2024-03-05 10:15:58 -03001576 &fcloop_class, NULL, MKDEV(0, 0), NULL,
James Smart475d0fe2016-12-02 00:28:44 -08001577 fcloop_dev_attr_groups, "ctl");
1578 if (IS_ERR(fcloop_device)) {
1579 pr_err("couldn't create ctl device!\n");
1580 ret = PTR_ERR(fcloop_device);
1581 goto out_destroy_class;
1582 }
1583
1584 get_device(fcloop_device);
1585
1586 return 0;
1587
1588out_destroy_class:
Ricardo B. Marliere800bb2b2024-03-05 10:15:58 -03001589 class_unregister(&fcloop_class);
James Smart475d0fe2016-12-02 00:28:44 -08001590 return ret;
1591}
1592
1593static void __exit fcloop_exit(void)
1594{
James Smart2b54996b72020-12-07 12:29:40 -08001595 struct fcloop_lport *lport = NULL;
1596 struct fcloop_nport *nport = NULL;
James Smart475d0fe2016-12-02 00:28:44 -08001597 struct fcloop_tport *tport;
1598 struct fcloop_rport *rport;
1599 unsigned long flags;
1600 int ret;
1601
1602 spin_lock_irqsave(&fcloop_lock, flags);
1603
1604 for (;;) {
1605 nport = list_first_entry_or_null(&fcloop_nports,
1606 typeof(*nport), nport_list);
1607 if (!nport)
1608 break;
1609
1610 tport = __unlink_target_port(nport);
1611 rport = __unlink_remote_port(nport);
1612
1613 spin_unlock_irqrestore(&fcloop_lock, flags);
1614
James Smartfddc9922017-09-19 14:01:50 -07001615 ret = __targetport_unreg(nport, tport);
James Smart475d0fe2016-12-02 00:28:44 -08001616 if (ret)
1617 pr_warn("%s: Failed deleting target port\n", __func__);
1618
James Smartfddc9922017-09-19 14:01:50 -07001619 ret = __remoteport_unreg(nport, rport);
James Smart475d0fe2016-12-02 00:28:44 -08001620 if (ret)
1621 pr_warn("%s: Failed deleting remote port\n", __func__);
1622
1623 spin_lock_irqsave(&fcloop_lock, flags);
1624 }
1625
1626 for (;;) {
1627 lport = list_first_entry_or_null(&fcloop_lports,
1628 typeof(*lport), lport_list);
1629 if (!lport)
1630 break;
1631
1632 __unlink_local_port(lport);
1633
1634 spin_unlock_irqrestore(&fcloop_lock, flags);
1635
1636 ret = __wait_localport_unreg(lport);
1637 if (ret)
1638 pr_warn("%s: Failed deleting local port\n", __func__);
1639
1640 spin_lock_irqsave(&fcloop_lock, flags);
1641 }
1642
1643 spin_unlock_irqrestore(&fcloop_lock, flags);
1644
1645 put_device(fcloop_device);
1646
Ricardo B. Marliere800bb2b2024-03-05 10:15:58 -03001647 device_destroy(&fcloop_class, MKDEV(0, 0));
1648 class_unregister(&fcloop_class);
James Smart475d0fe2016-12-02 00:28:44 -08001649}
1650
1651module_init(fcloop_init);
1652module_exit(fcloop_exit);
1653
Chaitanya Kulkarni41951f82024-01-23 14:13:41 -08001654MODULE_DESCRIPTION("NVMe target FC loop transport driver");
James Smart475d0fe2016-12-02 00:28:44 -08001655MODULE_LICENSE("GPL v2");