2 * Copyright (c) 2016 Avago Technologies. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful.
9 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
10 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
11 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO
12 * THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
13 * See the GNU General Public License for more details, a copy of which
14 * can be found in the file COPYING included with this package
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 #include <linux/module.h>
18 #include <linux/parser.h>
19 #include <uapi/scsi/fc/fc_fs.h>
21 #include "../host/nvme.h"
22 #include "../target/nvmet.h"
23 #include <linux/nvme-fc-driver.h>
24 #include <linux/nvme-fc.h>
29 NVMF_OPT_WWNN = 1 << 0,
30 NVMF_OPT_WWPN = 1 << 1,
31 NVMF_OPT_ROLES = 1 << 2,
32 NVMF_OPT_FCADDR = 1 << 3,
33 NVMF_OPT_LPWWNN = 1 << 4,
34 NVMF_OPT_LPWWPN = 1 << 5,
37 struct fcloop_ctrl_options {
47 static const match_table_t opt_tokens = {
48 { NVMF_OPT_WWNN, "wwnn=%s" },
49 { NVMF_OPT_WWPN, "wwpn=%s" },
50 { NVMF_OPT_ROLES, "roles=%d" },
51 { NVMF_OPT_FCADDR, "fcaddr=%x" },
52 { NVMF_OPT_LPWWNN, "lpwwnn=%s" },
53 { NVMF_OPT_LPWWPN, "lpwwpn=%s" },
54 { NVMF_OPT_ERR, NULL }
58 fcloop_parse_options(struct fcloop_ctrl_options *opts,
61 substring_t args[MAX_OPT_ARGS];
62 char *options, *o, *p;
66 options = o = kstrdup(buf, GFP_KERNEL);
70 while ((p = strsep(&o, ",\n")) != NULL) {
74 token = match_token(p, opt_tokens, args);
78 if (match_u64(args, &token64)) {
80 goto out_free_options;
85 if (match_u64(args, &token64)) {
87 goto out_free_options;
92 if (match_int(args, &token)) {
94 goto out_free_options;
99 if (match_hex(args, &token)) {
101 goto out_free_options;
103 opts->fcaddr = token;
105 case NVMF_OPT_LPWWNN:
106 if (match_u64(args, &token64)) {
108 goto out_free_options;
110 opts->lpwwnn = token64;
112 case NVMF_OPT_LPWWPN:
113 if (match_u64(args, &token64)) {
115 goto out_free_options;
117 opts->lpwwpn = token64;
120 pr_warn("unknown parameter or missing value '%s'\n", p);
122 goto out_free_options;
133 fcloop_parse_nm_options(struct device *dev, u64 *nname, u64 *pname,
136 substring_t args[MAX_OPT_ARGS];
137 char *options, *o, *p;
144 options = o = kstrdup(buf, GFP_KERNEL);
148 while ((p = strsep(&o, ",\n")) != NULL) {
152 token = match_token(p, opt_tokens, args);
155 if (match_u64(args, &token64)) {
157 goto out_free_options;
162 if (match_u64(args, &token64)) {
164 goto out_free_options;
169 pr_warn("unknown parameter or missing value '%s'\n", p);
171 goto out_free_options;
189 #define LPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN)
191 #define RPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN | \
192 NVMF_OPT_LPWWNN | NVMF_OPT_LPWWPN)
194 #define TGTPORT_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN)
196 #define ALL_OPTS (NVMF_OPT_WWNN | NVMF_OPT_WWPN | NVMF_OPT_ROLES | \
197 NVMF_OPT_FCADDR | NVMF_OPT_LPWWNN | NVMF_OPT_LPWWPN)
200 static DEFINE_SPINLOCK(fcloop_lock);
201 static LIST_HEAD(fcloop_lports);
202 static LIST_HEAD(fcloop_nports);
204 struct fcloop_lport {
205 struct nvme_fc_local_port *localport;
206 struct list_head lport_list;
207 struct completion unreg_done;
210 struct fcloop_rport {
211 struct nvme_fc_remote_port *remoteport;
212 struct nvmet_fc_target_port *targetport;
213 struct fcloop_nport *nport;
214 struct fcloop_lport *lport;
217 struct fcloop_tport {
218 struct nvmet_fc_target_port *targetport;
219 struct nvme_fc_remote_port *remoteport;
220 struct fcloop_nport *nport;
221 struct fcloop_lport *lport;
224 struct fcloop_nport {
225 struct fcloop_rport *rport;
226 struct fcloop_tport *tport;
227 struct fcloop_lport *lport;
228 struct list_head nport_list;
230 struct completion rport_unreg_done;
231 struct completion tport_unreg_done;
238 struct fcloop_lsreq {
239 struct fcloop_tport *tport;
240 struct nvmefc_ls_req *lsreq;
241 struct work_struct work;
242 struct nvmefc_tgt_ls_req tgt_ls_req;
246 struct fcloop_fcpreq {
247 struct fcloop_tport *tport;
248 struct nvmefc_fcp_req *fcpreq;
253 struct work_struct work;
254 struct nvmefc_tgt_fcp_req tgt_fcp_req;
257 struct fcloop_ini_fcpreq {
258 struct nvmefc_fcp_req *fcpreq;
259 struct fcloop_fcpreq *tfcp_req;
260 struct work_struct iniwork;
263 static inline struct fcloop_lsreq *
264 tgt_ls_req_to_lsreq(struct nvmefc_tgt_ls_req *tgt_lsreq)
266 return container_of(tgt_lsreq, struct fcloop_lsreq, tgt_ls_req);
269 static inline struct fcloop_fcpreq *
270 tgt_fcp_req_to_fcpreq(struct nvmefc_tgt_fcp_req *tgt_fcpreq)
272 return container_of(tgt_fcpreq, struct fcloop_fcpreq, tgt_fcp_req);
277 fcloop_create_queue(struct nvme_fc_local_port *localport,
278 unsigned int qidx, u16 qsize,
286 fcloop_delete_queue(struct nvme_fc_local_port *localport,
287 unsigned int idx, void *handle)
293 * Transmit of LS RSP done (e.g. buffers all set). call back up
294 * initiator "done" flows.
297 fcloop_tgt_lsrqst_done_work(struct work_struct *work)
299 struct fcloop_lsreq *tls_req =
300 container_of(work, struct fcloop_lsreq, work);
301 struct fcloop_tport *tport = tls_req->tport;
302 struct nvmefc_ls_req *lsreq = tls_req->lsreq;
304 if (tport->remoteport)
305 lsreq->done(lsreq, tls_req->status);
309 fcloop_ls_req(struct nvme_fc_local_port *localport,
310 struct nvme_fc_remote_port *remoteport,
311 struct nvmefc_ls_req *lsreq)
313 struct fcloop_lsreq *tls_req = lsreq->private;
314 struct fcloop_rport *rport = remoteport->private;
317 tls_req->lsreq = lsreq;
318 INIT_WORK(&tls_req->work, fcloop_tgt_lsrqst_done_work);
320 if (!rport->targetport) {
321 tls_req->status = -ECONNREFUSED;
322 schedule_work(&tls_req->work);
327 tls_req->tport = rport->targetport->private;
328 ret = nvmet_fc_rcv_ls_req(rport->targetport, &tls_req->tgt_ls_req,
329 lsreq->rqstaddr, lsreq->rqstlen);
335 fcloop_xmt_ls_rsp(struct nvmet_fc_target_port *tport,
336 struct nvmefc_tgt_ls_req *tgt_lsreq)
338 struct fcloop_lsreq *tls_req = tgt_ls_req_to_lsreq(tgt_lsreq);
339 struct nvmefc_ls_req *lsreq = tls_req->lsreq;
341 memcpy(lsreq->rspaddr, tgt_lsreq->rspbuf,
342 ((lsreq->rsplen < tgt_lsreq->rsplen) ?
343 lsreq->rsplen : tgt_lsreq->rsplen));
344 tgt_lsreq->done(tgt_lsreq);
346 schedule_work(&tls_req->work);
352 * FCP IO operation done by initiator abort.
353 * call back up initiator "done" flows.
356 fcloop_tgt_fcprqst_ini_done_work(struct work_struct *work)
358 struct fcloop_ini_fcpreq *inireq =
359 container_of(work, struct fcloop_ini_fcpreq, iniwork);
361 inireq->fcpreq->done(inireq->fcpreq);
365 * FCP IO operation done by target completion.
366 * call back up initiator "done" flows.
369 fcloop_tgt_fcprqst_done_work(struct work_struct *work)
371 struct fcloop_fcpreq *tfcp_req =
372 container_of(work, struct fcloop_fcpreq, work);
373 struct fcloop_tport *tport = tfcp_req->tport;
374 struct nvmefc_fcp_req *fcpreq;
376 spin_lock(&tfcp_req->reqlock);
377 fcpreq = tfcp_req->fcpreq;
378 spin_unlock(&tfcp_req->reqlock);
380 if (tport->remoteport && fcpreq) {
381 fcpreq->status = tfcp_req->status;
382 fcpreq->done(fcpreq);
390 fcloop_fcp_req(struct nvme_fc_local_port *localport,
391 struct nvme_fc_remote_port *remoteport,
392 void *hw_queue_handle,
393 struct nvmefc_fcp_req *fcpreq)
395 struct fcloop_rport *rport = remoteport->private;
396 struct fcloop_ini_fcpreq *inireq = fcpreq->private;
397 struct fcloop_fcpreq *tfcp_req;
400 if (!rport->targetport)
401 return -ECONNREFUSED;
403 tfcp_req = kzalloc(sizeof(*tfcp_req), GFP_KERNEL);
407 inireq->fcpreq = fcpreq;
408 inireq->tfcp_req = tfcp_req;
409 INIT_WORK(&inireq->iniwork, fcloop_tgt_fcprqst_ini_done_work);
410 tfcp_req->fcpreq = fcpreq;
411 tfcp_req->tport = rport->targetport->private;
412 spin_lock_init(&tfcp_req->reqlock);
413 INIT_WORK(&tfcp_req->work, fcloop_tgt_fcprqst_done_work);
415 ret = nvmet_fc_rcv_fcp_req(rport->targetport, &tfcp_req->tgt_fcp_req,
416 fcpreq->cmdaddr, fcpreq->cmdlen);
422 fcloop_fcp_copy_data(u8 op, struct scatterlist *data_sg,
423 struct scatterlist *io_sg, u32 offset, u32 length)
426 u32 data_len, io_len, tlen;
428 io_p = sg_virt(io_sg);
429 io_len = io_sg->length;
432 tlen = min_t(u32, offset, io_len);
436 io_sg = sg_next(io_sg);
437 io_p = sg_virt(io_sg);
438 io_len = io_sg->length;
443 data_p = sg_virt(data_sg);
444 data_len = data_sg->length;
447 tlen = min_t(u32, io_len, data_len);
448 tlen = min_t(u32, tlen, length);
450 if (op == NVMET_FCOP_WRITEDATA)
451 memcpy(data_p, io_p, tlen);
453 memcpy(io_p, data_p, tlen);
458 if ((!io_len) && (length)) {
459 io_sg = sg_next(io_sg);
460 io_p = sg_virt(io_sg);
461 io_len = io_sg->length;
466 if ((!data_len) && (length)) {
467 data_sg = sg_next(data_sg);
468 data_p = sg_virt(data_sg);
469 data_len = data_sg->length;
476 fcloop_fcp_op(struct nvmet_fc_target_port *tgtport,
477 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
479 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
480 struct nvmefc_fcp_req *fcpreq;
481 u32 rsplen = 0, xfrlen = 0;
482 int fcp_err = 0, active, aborted;
483 u8 op = tgt_fcpreq->op;
485 spin_lock(&tfcp_req->reqlock);
486 fcpreq = tfcp_req->fcpreq;
487 active = tfcp_req->active;
488 aborted = tfcp_req->aborted;
489 tfcp_req->active = true;
490 spin_unlock(&tfcp_req->reqlock);
492 if (unlikely(active))
493 /* illegal - call while i/o active */
496 if (unlikely(aborted)) {
497 /* target transport has aborted i/o prior */
498 spin_lock(&tfcp_req->reqlock);
499 tfcp_req->active = false;
500 spin_unlock(&tfcp_req->reqlock);
501 tgt_fcpreq->transferred_length = 0;
502 tgt_fcpreq->fcp_error = -ECANCELED;
503 tgt_fcpreq->done(tgt_fcpreq);
508 * if fcpreq is NULL, the I/O has been aborted (from
509 * initiator side). For the target side, act as if all is well
510 * but don't actually move data.
514 case NVMET_FCOP_WRITEDATA:
515 xfrlen = tgt_fcpreq->transfer_length;
517 fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
518 fcpreq->first_sgl, tgt_fcpreq->offset,
520 fcpreq->transferred_length += xfrlen;
524 case NVMET_FCOP_READDATA:
525 case NVMET_FCOP_READDATA_RSP:
526 xfrlen = tgt_fcpreq->transfer_length;
528 fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
529 fcpreq->first_sgl, tgt_fcpreq->offset,
531 fcpreq->transferred_length += xfrlen;
533 if (op == NVMET_FCOP_READDATA)
536 /* Fall-Thru to RSP handling */
540 rsplen = ((fcpreq->rsplen < tgt_fcpreq->rsplen) ?
541 fcpreq->rsplen : tgt_fcpreq->rsplen);
542 memcpy(fcpreq->rspaddr, tgt_fcpreq->rspaddr, rsplen);
543 if (rsplen < tgt_fcpreq->rsplen)
545 fcpreq->rcv_rsplen = rsplen;
548 tfcp_req->status = 0;
556 spin_lock(&tfcp_req->reqlock);
557 tfcp_req->active = false;
558 spin_unlock(&tfcp_req->reqlock);
560 tgt_fcpreq->transferred_length = xfrlen;
561 tgt_fcpreq->fcp_error = fcp_err;
562 tgt_fcpreq->done(tgt_fcpreq);
568 fcloop_tgt_fcp_abort(struct nvmet_fc_target_port *tgtport,
569 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
571 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
574 * mark aborted only in case there were 2 threads in transport
575 * (one doing io, other doing abort) and only kills ops posted
576 * after the abort request
578 spin_lock(&tfcp_req->reqlock);
579 tfcp_req->aborted = true;
580 spin_unlock(&tfcp_req->reqlock);
582 tfcp_req->status = NVME_SC_FC_TRANSPORT_ABORTED;
585 * nothing more to do. If io wasn't active, the transport should
586 * immediately call the req_release. If it was active, the op
587 * will complete, and the lldd should call req_release.
592 fcloop_fcp_req_release(struct nvmet_fc_target_port *tgtport,
593 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
595 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
597 schedule_work(&tfcp_req->work);
601 fcloop_ls_abort(struct nvme_fc_local_port *localport,
602 struct nvme_fc_remote_port *remoteport,
603 struct nvmefc_ls_req *lsreq)
608 fcloop_fcp_abort(struct nvme_fc_local_port *localport,
609 struct nvme_fc_remote_port *remoteport,
610 void *hw_queue_handle,
611 struct nvmefc_fcp_req *fcpreq)
613 struct fcloop_rport *rport = remoteport->private;
614 struct fcloop_ini_fcpreq *inireq = fcpreq->private;
615 struct fcloop_fcpreq *tfcp_req = inireq->tfcp_req;
618 /* abort has already been called */
621 if (rport->targetport)
622 nvmet_fc_rcv_fcp_abort(rport->targetport,
623 &tfcp_req->tgt_fcp_req);
625 /* break initiator/target relationship for io */
626 spin_lock(&tfcp_req->reqlock);
627 inireq->tfcp_req = NULL;
628 tfcp_req->fcpreq = NULL;
629 spin_unlock(&tfcp_req->reqlock);
631 /* post the aborted io completion */
632 fcpreq->status = -ECANCELED;
633 schedule_work(&inireq->iniwork);
637 fcloop_localport_delete(struct nvme_fc_local_port *localport)
639 struct fcloop_lport *lport = localport->private;
641 /* release any threads waiting for the unreg to complete */
642 complete(&lport->unreg_done);
646 fcloop_remoteport_delete(struct nvme_fc_remote_port *remoteport)
648 struct fcloop_rport *rport = remoteport->private;
650 /* release any threads waiting for the unreg to complete */
651 complete(&rport->nport->rport_unreg_done);
655 fcloop_targetport_delete(struct nvmet_fc_target_port *targetport)
657 struct fcloop_tport *tport = targetport->private;
659 /* release any threads waiting for the unreg to complete */
660 complete(&tport->nport->tport_unreg_done);
663 #define FCLOOP_HW_QUEUES 4
664 #define FCLOOP_SGL_SEGS 256
665 #define FCLOOP_DMABOUND_4G 0xFFFFFFFF
667 static struct nvme_fc_port_template fctemplate = {
668 .localport_delete = fcloop_localport_delete,
669 .remoteport_delete = fcloop_remoteport_delete,
670 .create_queue = fcloop_create_queue,
671 .delete_queue = fcloop_delete_queue,
672 .ls_req = fcloop_ls_req,
673 .fcp_io = fcloop_fcp_req,
674 .ls_abort = fcloop_ls_abort,
675 .fcp_abort = fcloop_fcp_abort,
676 .max_hw_queues = FCLOOP_HW_QUEUES,
677 .max_sgl_segments = FCLOOP_SGL_SEGS,
678 .max_dif_sgl_segments = FCLOOP_SGL_SEGS,
679 .dma_boundary = FCLOOP_DMABOUND_4G,
680 /* sizes of additional private data for data structures */
681 .local_priv_sz = sizeof(struct fcloop_lport),
682 .remote_priv_sz = sizeof(struct fcloop_rport),
683 .lsrqst_priv_sz = sizeof(struct fcloop_lsreq),
684 .fcprqst_priv_sz = sizeof(struct fcloop_ini_fcpreq),
687 static struct nvmet_fc_target_template tgttemplate = {
688 .targetport_delete = fcloop_targetport_delete,
689 .xmt_ls_rsp = fcloop_xmt_ls_rsp,
690 .fcp_op = fcloop_fcp_op,
691 .fcp_abort = fcloop_tgt_fcp_abort,
692 .fcp_req_release = fcloop_fcp_req_release,
693 .max_hw_queues = FCLOOP_HW_QUEUES,
694 .max_sgl_segments = FCLOOP_SGL_SEGS,
695 .max_dif_sgl_segments = FCLOOP_SGL_SEGS,
696 .dma_boundary = FCLOOP_DMABOUND_4G,
697 /* optional features */
698 .target_features = NVMET_FCTGTFEAT_CMD_IN_ISR |
699 NVMET_FCTGTFEAT_OPDONE_IN_ISR,
700 /* sizes of additional private data for data structures */
701 .target_priv_sz = sizeof(struct fcloop_tport),
705 fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
706 const char *buf, size_t count)
708 struct nvme_fc_port_info pinfo;
709 struct fcloop_ctrl_options *opts;
710 struct nvme_fc_local_port *localport;
711 struct fcloop_lport *lport;
714 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
718 ret = fcloop_parse_options(opts, buf);
722 /* everything there ? */
723 if ((opts->mask & LPORT_OPTS) != LPORT_OPTS) {
728 pinfo.node_name = opts->wwnn;
729 pinfo.port_name = opts->wwpn;
730 pinfo.port_role = opts->roles;
731 pinfo.port_id = opts->fcaddr;
733 ret = nvme_fc_register_localport(&pinfo, &fctemplate, NULL, &localport);
738 lport = localport->private;
739 lport->localport = localport;
740 INIT_LIST_HEAD(&lport->lport_list);
742 spin_lock_irqsave(&fcloop_lock, flags);
743 list_add_tail(&lport->lport_list, &fcloop_lports);
744 spin_unlock_irqrestore(&fcloop_lock, flags);
746 /* mark all of the input buffer consumed */
752 return ret ? ret : count;
757 __unlink_local_port(struct fcloop_lport *lport)
759 list_del(&lport->lport_list);
763 __wait_localport_unreg(struct fcloop_lport *lport)
767 init_completion(&lport->unreg_done);
769 ret = nvme_fc_unregister_localport(lport->localport);
771 wait_for_completion(&lport->unreg_done);
778 fcloop_delete_local_port(struct device *dev, struct device_attribute *attr,
779 const char *buf, size_t count)
781 struct fcloop_lport *tlport, *lport = NULL;
782 u64 nodename, portname;
786 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
790 spin_lock_irqsave(&fcloop_lock, flags);
792 list_for_each_entry(tlport, &fcloop_lports, lport_list) {
793 if (tlport->localport->node_name == nodename &&
794 tlport->localport->port_name == portname) {
796 __unlink_local_port(lport);
800 spin_unlock_irqrestore(&fcloop_lock, flags);
805 ret = __wait_localport_unreg(lport);
807 return ret ? ret : count;
811 fcloop_nport_free(struct kref *ref)
813 struct fcloop_nport *nport =
814 container_of(ref, struct fcloop_nport, ref);
817 spin_lock_irqsave(&fcloop_lock, flags);
818 list_del(&nport->nport_list);
819 spin_unlock_irqrestore(&fcloop_lock, flags);
825 fcloop_nport_put(struct fcloop_nport *nport)
827 kref_put(&nport->ref, fcloop_nport_free);
831 fcloop_nport_get(struct fcloop_nport *nport)
833 return kref_get_unless_zero(&nport->ref);
836 static struct fcloop_nport *
837 fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
839 struct fcloop_nport *newnport, *nport = NULL;
840 struct fcloop_lport *tmplport, *lport = NULL;
841 struct fcloop_ctrl_options *opts;
843 u32 opts_mask = (remoteport) ? RPORT_OPTS : TGTPORT_OPTS;
846 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
850 ret = fcloop_parse_options(opts, buf);
854 /* everything there ? */
855 if ((opts->mask & opts_mask) != opts_mask) {
860 newnport = kzalloc(sizeof(*newnport), GFP_KERNEL);
864 INIT_LIST_HEAD(&newnport->nport_list);
865 newnport->node_name = opts->wwnn;
866 newnport->port_name = opts->wwpn;
867 if (opts->mask & NVMF_OPT_ROLES)
868 newnport->port_role = opts->roles;
869 if (opts->mask & NVMF_OPT_FCADDR)
870 newnport->port_id = opts->fcaddr;
871 kref_init(&newnport->ref);
873 spin_lock_irqsave(&fcloop_lock, flags);
875 list_for_each_entry(tmplport, &fcloop_lports, lport_list) {
876 if (tmplport->localport->node_name == opts->wwnn &&
877 tmplport->localport->port_name == opts->wwpn)
878 goto out_invalid_opts;
880 if (tmplport->localport->node_name == opts->lpwwnn &&
881 tmplport->localport->port_name == opts->lpwwpn)
887 goto out_invalid_opts;
888 newnport->lport = lport;
891 list_for_each_entry(nport, &fcloop_nports, nport_list) {
892 if (nport->node_name == opts->wwnn &&
893 nport->port_name == opts->wwpn) {
894 if ((remoteport && nport->rport) ||
895 (!remoteport && nport->tport)) {
897 goto out_invalid_opts;
900 fcloop_nport_get(nport);
902 spin_unlock_irqrestore(&fcloop_lock, flags);
905 nport->lport = lport;
906 if (opts->mask & NVMF_OPT_ROLES)
907 nport->port_role = opts->roles;
908 if (opts->mask & NVMF_OPT_FCADDR)
909 nport->port_id = opts->fcaddr;
910 goto out_free_newnport;
914 list_add_tail(&newnport->nport_list, &fcloop_nports);
916 spin_unlock_irqrestore(&fcloop_lock, flags);
922 spin_unlock_irqrestore(&fcloop_lock, flags);
931 fcloop_create_remote_port(struct device *dev, struct device_attribute *attr,
932 const char *buf, size_t count)
934 struct nvme_fc_remote_port *remoteport;
935 struct fcloop_nport *nport;
936 struct fcloop_rport *rport;
937 struct nvme_fc_port_info pinfo;
940 nport = fcloop_alloc_nport(buf, count, true);
944 pinfo.node_name = nport->node_name;
945 pinfo.port_name = nport->port_name;
946 pinfo.port_role = nport->port_role;
947 pinfo.port_id = nport->port_id;
949 ret = nvme_fc_register_remoteport(nport->lport->localport,
950 &pinfo, &remoteport);
951 if (ret || !remoteport) {
952 fcloop_nport_put(nport);
957 rport = remoteport->private;
958 rport->remoteport = remoteport;
959 rport->targetport = (nport->tport) ? nport->tport->targetport : NULL;
961 nport->tport->remoteport = remoteport;
962 nport->tport->lport = nport->lport;
964 rport->nport = nport;
965 rport->lport = nport->lport;
966 nport->rport = rport;
972 static struct fcloop_rport *
973 __unlink_remote_port(struct fcloop_nport *nport)
975 struct fcloop_rport *rport = nport->rport;
977 if (rport && nport->tport)
978 nport->tport->remoteport = NULL;
985 __wait_remoteport_unreg(struct fcloop_nport *nport, struct fcloop_rport *rport)
992 init_completion(&nport->rport_unreg_done);
994 ret = nvme_fc_unregister_remoteport(rport->remoteport);
998 wait_for_completion(&nport->rport_unreg_done);
1000 fcloop_nport_put(nport);
1006 fcloop_delete_remote_port(struct device *dev, struct device_attribute *attr,
1007 const char *buf, size_t count)
1009 struct fcloop_nport *nport = NULL, *tmpport;
1010 static struct fcloop_rport *rport;
1011 u64 nodename, portname;
1012 unsigned long flags;
1015 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1019 spin_lock_irqsave(&fcloop_lock, flags);
1021 list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
1022 if (tmpport->node_name == nodename &&
1023 tmpport->port_name == portname && tmpport->rport) {
1025 rport = __unlink_remote_port(nport);
1030 spin_unlock_irqrestore(&fcloop_lock, flags);
1035 ret = __wait_remoteport_unreg(nport, rport);
1037 return ret ? ret : count;
1041 fcloop_create_target_port(struct device *dev, struct device_attribute *attr,
1042 const char *buf, size_t count)
1044 struct nvmet_fc_target_port *targetport;
1045 struct fcloop_nport *nport;
1046 struct fcloop_tport *tport;
1047 struct nvmet_fc_port_info tinfo;
1050 nport = fcloop_alloc_nport(buf, count, false);
1054 tinfo.node_name = nport->node_name;
1055 tinfo.port_name = nport->port_name;
1056 tinfo.port_id = nport->port_id;
1058 ret = nvmet_fc_register_targetport(&tinfo, &tgttemplate, NULL,
1061 fcloop_nport_put(nport);
1066 tport = targetport->private;
1067 tport->targetport = targetport;
1068 tport->remoteport = (nport->rport) ? nport->rport->remoteport : NULL;
1070 nport->rport->targetport = targetport;
1071 tport->nport = nport;
1072 tport->lport = nport->lport;
1073 nport->tport = tport;
1079 static struct fcloop_tport *
1080 __unlink_target_port(struct fcloop_nport *nport)
1082 struct fcloop_tport *tport = nport->tport;
1084 if (tport && nport->rport)
1085 nport->rport->targetport = NULL;
1086 nport->tport = NULL;
1092 __wait_targetport_unreg(struct fcloop_nport *nport, struct fcloop_tport *tport)
1099 init_completion(&nport->tport_unreg_done);
1101 ret = nvmet_fc_unregister_targetport(tport->targetport);
1105 wait_for_completion(&nport->tport_unreg_done);
1107 fcloop_nport_put(nport);
1113 fcloop_delete_target_port(struct device *dev, struct device_attribute *attr,
1114 const char *buf, size_t count)
1116 struct fcloop_nport *nport = NULL, *tmpport;
1117 struct fcloop_tport *tport;
1118 u64 nodename, portname;
1119 unsigned long flags;
1122 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1126 spin_lock_irqsave(&fcloop_lock, flags);
1128 list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
1129 if (tmpport->node_name == nodename &&
1130 tmpport->port_name == portname && tmpport->tport) {
1132 tport = __unlink_target_port(nport);
1137 spin_unlock_irqrestore(&fcloop_lock, flags);
1142 ret = __wait_targetport_unreg(nport, tport);
1144 return ret ? ret : count;
1148 static DEVICE_ATTR(add_local_port, 0200, NULL, fcloop_create_local_port);
1149 static DEVICE_ATTR(del_local_port, 0200, NULL, fcloop_delete_local_port);
1150 static DEVICE_ATTR(add_remote_port, 0200, NULL, fcloop_create_remote_port);
1151 static DEVICE_ATTR(del_remote_port, 0200, NULL, fcloop_delete_remote_port);
1152 static DEVICE_ATTR(add_target_port, 0200, NULL, fcloop_create_target_port);
1153 static DEVICE_ATTR(del_target_port, 0200, NULL, fcloop_delete_target_port);
1155 static struct attribute *fcloop_dev_attrs[] = {
1156 &dev_attr_add_local_port.attr,
1157 &dev_attr_del_local_port.attr,
1158 &dev_attr_add_remote_port.attr,
1159 &dev_attr_del_remote_port.attr,
1160 &dev_attr_add_target_port.attr,
1161 &dev_attr_del_target_port.attr,
1165 static struct attribute_group fclopp_dev_attrs_group = {
1166 .attrs = fcloop_dev_attrs,
1169 static const struct attribute_group *fcloop_dev_attr_groups[] = {
1170 &fclopp_dev_attrs_group,
1174 static struct class *fcloop_class;
1175 static struct device *fcloop_device;
1178 static int __init fcloop_init(void)
1182 fcloop_class = class_create(THIS_MODULE, "fcloop");
1183 if (IS_ERR(fcloop_class)) {
1184 pr_err("couldn't register class fcloop\n");
1185 ret = PTR_ERR(fcloop_class);
1189 fcloop_device = device_create_with_groups(
1190 fcloop_class, NULL, MKDEV(0, 0), NULL,
1191 fcloop_dev_attr_groups, "ctl");
1192 if (IS_ERR(fcloop_device)) {
1193 pr_err("couldn't create ctl device!\n");
1194 ret = PTR_ERR(fcloop_device);
1195 goto out_destroy_class;
1198 get_device(fcloop_device);
1203 class_destroy(fcloop_class);
1207 static void __exit fcloop_exit(void)
1209 struct fcloop_lport *lport;
1210 struct fcloop_nport *nport;
1211 struct fcloop_tport *tport;
1212 struct fcloop_rport *rport;
1213 unsigned long flags;
1216 spin_lock_irqsave(&fcloop_lock, flags);
1219 nport = list_first_entry_or_null(&fcloop_nports,
1220 typeof(*nport), nport_list);
1224 tport = __unlink_target_port(nport);
1225 rport = __unlink_remote_port(nport);
1227 spin_unlock_irqrestore(&fcloop_lock, flags);
1229 ret = __wait_targetport_unreg(nport, tport);
1231 pr_warn("%s: Failed deleting target port\n", __func__);
1233 ret = __wait_remoteport_unreg(nport, rport);
1235 pr_warn("%s: Failed deleting remote port\n", __func__);
1237 spin_lock_irqsave(&fcloop_lock, flags);
1241 lport = list_first_entry_or_null(&fcloop_lports,
1242 typeof(*lport), lport_list);
1246 __unlink_local_port(lport);
1248 spin_unlock_irqrestore(&fcloop_lock, flags);
1250 ret = __wait_localport_unreg(lport);
1252 pr_warn("%s: Failed deleting local port\n", __func__);
1254 spin_lock_irqsave(&fcloop_lock, flags);
1257 spin_unlock_irqrestore(&fcloop_lock, flags);
1259 put_device(fcloop_device);
1261 device_destroy(fcloop_class, MKDEV(0, 0));
1262 class_destroy(fcloop_class);
1265 module_init(fcloop_init);
1266 module_exit(fcloop_exit);
1268 MODULE_LICENSE("GPL v2");