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)
197 static DEFINE_SPINLOCK(fcloop_lock);
198 static LIST_HEAD(fcloop_lports);
199 static LIST_HEAD(fcloop_nports);
201 struct fcloop_lport {
202 struct nvme_fc_local_port *localport;
203 struct list_head lport_list;
204 struct completion unreg_done;
207 struct fcloop_lport_priv {
208 struct fcloop_lport *lport;
211 struct fcloop_rport {
212 struct nvme_fc_remote_port *remoteport;
213 struct nvmet_fc_target_port *targetport;
214 struct fcloop_nport *nport;
215 struct fcloop_lport *lport;
218 struct fcloop_tport {
219 struct nvmet_fc_target_port *targetport;
220 struct nvme_fc_remote_port *remoteport;
221 struct fcloop_nport *nport;
222 struct fcloop_lport *lport;
225 struct fcloop_nport {
226 struct fcloop_rport *rport;
227 struct fcloop_tport *tport;
228 struct fcloop_lport *lport;
229 struct list_head nport_list;
237 struct fcloop_lsreq {
238 struct fcloop_tport *tport;
239 struct nvmefc_ls_req *lsreq;
240 struct work_struct work;
241 struct nvmefc_tgt_ls_req tgt_ls_req;
249 INI_IO_COMPLETED = 3,
252 struct fcloop_fcpreq {
253 struct fcloop_tport *tport;
254 struct nvmefc_fcp_req *fcpreq;
261 struct work_struct fcp_rcv_work;
262 struct work_struct abort_rcv_work;
263 struct work_struct tio_done_work;
264 struct nvmefc_tgt_fcp_req tgt_fcp_req;
267 struct fcloop_ini_fcpreq {
268 struct nvmefc_fcp_req *fcpreq;
269 struct fcloop_fcpreq *tfcp_req;
273 static inline struct fcloop_lsreq *
274 tgt_ls_req_to_lsreq(struct nvmefc_tgt_ls_req *tgt_lsreq)
276 return container_of(tgt_lsreq, struct fcloop_lsreq, tgt_ls_req);
279 static inline struct fcloop_fcpreq *
280 tgt_fcp_req_to_fcpreq(struct nvmefc_tgt_fcp_req *tgt_fcpreq)
282 return container_of(tgt_fcpreq, struct fcloop_fcpreq, tgt_fcp_req);
287 fcloop_create_queue(struct nvme_fc_local_port *localport,
288 unsigned int qidx, u16 qsize,
296 fcloop_delete_queue(struct nvme_fc_local_port *localport,
297 unsigned int idx, void *handle)
303 * Transmit of LS RSP done (e.g. buffers all set). call back up
304 * initiator "done" flows.
307 fcloop_tgt_lsrqst_done_work(struct work_struct *work)
309 struct fcloop_lsreq *tls_req =
310 container_of(work, struct fcloop_lsreq, work);
311 struct fcloop_tport *tport = tls_req->tport;
312 struct nvmefc_ls_req *lsreq = tls_req->lsreq;
314 if (!tport || tport->remoteport)
315 lsreq->done(lsreq, tls_req->status);
319 fcloop_ls_req(struct nvme_fc_local_port *localport,
320 struct nvme_fc_remote_port *remoteport,
321 struct nvmefc_ls_req *lsreq)
323 struct fcloop_lsreq *tls_req = lsreq->private;
324 struct fcloop_rport *rport = remoteport->private;
327 tls_req->lsreq = lsreq;
328 INIT_WORK(&tls_req->work, fcloop_tgt_lsrqst_done_work);
330 if (!rport->targetport) {
331 tls_req->status = -ECONNREFUSED;
332 tls_req->tport = NULL;
333 schedule_work(&tls_req->work);
338 tls_req->tport = rport->targetport->private;
339 ret = nvmet_fc_rcv_ls_req(rport->targetport, &tls_req->tgt_ls_req,
340 lsreq->rqstaddr, lsreq->rqstlen);
346 fcloop_xmt_ls_rsp(struct nvmet_fc_target_port *tport,
347 struct nvmefc_tgt_ls_req *tgt_lsreq)
349 struct fcloop_lsreq *tls_req = tgt_ls_req_to_lsreq(tgt_lsreq);
350 struct nvmefc_ls_req *lsreq = tls_req->lsreq;
352 memcpy(lsreq->rspaddr, tgt_lsreq->rspbuf,
353 ((lsreq->rsplen < tgt_lsreq->rsplen) ?
354 lsreq->rsplen : tgt_lsreq->rsplen));
355 tgt_lsreq->done(tgt_lsreq);
357 schedule_work(&tls_req->work);
363 fcloop_tfcp_req_free(struct kref *ref)
365 struct fcloop_fcpreq *tfcp_req =
366 container_of(ref, struct fcloop_fcpreq, ref);
372 fcloop_tfcp_req_put(struct fcloop_fcpreq *tfcp_req)
374 kref_put(&tfcp_req->ref, fcloop_tfcp_req_free);
378 fcloop_tfcp_req_get(struct fcloop_fcpreq *tfcp_req)
380 return kref_get_unless_zero(&tfcp_req->ref);
384 fcloop_call_host_done(struct nvmefc_fcp_req *fcpreq,
385 struct fcloop_fcpreq *tfcp_req, int status)
387 struct fcloop_ini_fcpreq *inireq = NULL;
390 inireq = fcpreq->private;
391 spin_lock(&inireq->inilock);
392 inireq->tfcp_req = NULL;
393 spin_unlock(&inireq->inilock);
395 fcpreq->status = status;
396 fcpreq->done(fcpreq);
399 /* release original io reference on tgt struct */
400 fcloop_tfcp_req_put(tfcp_req);
404 fcloop_fcp_recv_work(struct work_struct *work)
406 struct fcloop_fcpreq *tfcp_req =
407 container_of(work, struct fcloop_fcpreq, fcp_rcv_work);
408 struct nvmefc_fcp_req *fcpreq = tfcp_req->fcpreq;
410 bool aborted = false;
412 spin_lock(&tfcp_req->reqlock);
413 switch (tfcp_req->inistate) {
415 tfcp_req->inistate = INI_IO_ACTIVE;
421 spin_unlock(&tfcp_req->reqlock);
425 spin_unlock(&tfcp_req->reqlock);
427 if (unlikely(aborted))
430 ret = nvmet_fc_rcv_fcp_req(tfcp_req->tport->targetport,
431 &tfcp_req->tgt_fcp_req,
432 fcpreq->cmdaddr, fcpreq->cmdlen);
434 fcloop_call_host_done(fcpreq, tfcp_req, ret);
440 fcloop_fcp_abort_recv_work(struct work_struct *work)
442 struct fcloop_fcpreq *tfcp_req =
443 container_of(work, struct fcloop_fcpreq, abort_rcv_work);
444 struct nvmefc_fcp_req *fcpreq;
445 bool completed = false;
447 spin_lock(&tfcp_req->reqlock);
448 fcpreq = tfcp_req->fcpreq;
449 switch (tfcp_req->inistate) {
452 case INI_IO_COMPLETED:
456 spin_unlock(&tfcp_req->reqlock);
460 spin_unlock(&tfcp_req->reqlock);
462 if (unlikely(completed)) {
463 /* remove reference taken in original abort downcall */
464 fcloop_tfcp_req_put(tfcp_req);
468 if (tfcp_req->tport->targetport)
469 nvmet_fc_rcv_fcp_abort(tfcp_req->tport->targetport,
470 &tfcp_req->tgt_fcp_req);
472 spin_lock(&tfcp_req->reqlock);
473 tfcp_req->fcpreq = NULL;
474 spin_unlock(&tfcp_req->reqlock);
476 fcloop_call_host_done(fcpreq, tfcp_req, -ECANCELED);
477 /* call_host_done releases reference for abort downcall */
481 * FCP IO operation done by target completion.
482 * call back up initiator "done" flows.
485 fcloop_tgt_fcprqst_done_work(struct work_struct *work)
487 struct fcloop_fcpreq *tfcp_req =
488 container_of(work, struct fcloop_fcpreq, tio_done_work);
489 struct nvmefc_fcp_req *fcpreq;
491 spin_lock(&tfcp_req->reqlock);
492 fcpreq = tfcp_req->fcpreq;
493 tfcp_req->inistate = INI_IO_COMPLETED;
494 spin_unlock(&tfcp_req->reqlock);
496 fcloop_call_host_done(fcpreq, tfcp_req, tfcp_req->status);
501 fcloop_fcp_req(struct nvme_fc_local_port *localport,
502 struct nvme_fc_remote_port *remoteport,
503 void *hw_queue_handle,
504 struct nvmefc_fcp_req *fcpreq)
506 struct fcloop_rport *rport = remoteport->private;
507 struct fcloop_ini_fcpreq *inireq = fcpreq->private;
508 struct fcloop_fcpreq *tfcp_req;
510 if (!rport->targetport)
511 return -ECONNREFUSED;
513 tfcp_req = kzalloc(sizeof(*tfcp_req), GFP_KERNEL);
517 inireq->fcpreq = fcpreq;
518 inireq->tfcp_req = tfcp_req;
519 spin_lock_init(&inireq->inilock);
521 tfcp_req->fcpreq = fcpreq;
522 tfcp_req->tport = rport->targetport->private;
523 tfcp_req->inistate = INI_IO_START;
524 spin_lock_init(&tfcp_req->reqlock);
525 INIT_WORK(&tfcp_req->fcp_rcv_work, fcloop_fcp_recv_work);
526 INIT_WORK(&tfcp_req->abort_rcv_work, fcloop_fcp_abort_recv_work);
527 INIT_WORK(&tfcp_req->tio_done_work, fcloop_tgt_fcprqst_done_work);
528 kref_init(&tfcp_req->ref);
530 schedule_work(&tfcp_req->fcp_rcv_work);
536 fcloop_fcp_copy_data(u8 op, struct scatterlist *data_sg,
537 struct scatterlist *io_sg, u32 offset, u32 length)
540 u32 data_len, io_len, tlen;
542 io_p = sg_virt(io_sg);
543 io_len = io_sg->length;
546 tlen = min_t(u32, offset, io_len);
550 io_sg = sg_next(io_sg);
551 io_p = sg_virt(io_sg);
552 io_len = io_sg->length;
557 data_p = sg_virt(data_sg);
558 data_len = data_sg->length;
561 tlen = min_t(u32, io_len, data_len);
562 tlen = min_t(u32, tlen, length);
564 if (op == NVMET_FCOP_WRITEDATA)
565 memcpy(data_p, io_p, tlen);
567 memcpy(io_p, data_p, tlen);
572 if ((!io_len) && (length)) {
573 io_sg = sg_next(io_sg);
574 io_p = sg_virt(io_sg);
575 io_len = io_sg->length;
580 if ((!data_len) && (length)) {
581 data_sg = sg_next(data_sg);
582 data_p = sg_virt(data_sg);
583 data_len = data_sg->length;
590 fcloop_fcp_op(struct nvmet_fc_target_port *tgtport,
591 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
593 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
594 struct nvmefc_fcp_req *fcpreq;
595 u32 rsplen = 0, xfrlen = 0;
596 int fcp_err = 0, active, aborted;
597 u8 op = tgt_fcpreq->op;
599 spin_lock(&tfcp_req->reqlock);
600 fcpreq = tfcp_req->fcpreq;
601 active = tfcp_req->active;
602 aborted = tfcp_req->aborted;
603 tfcp_req->active = true;
604 spin_unlock(&tfcp_req->reqlock);
606 if (unlikely(active))
607 /* illegal - call while i/o active */
610 if (unlikely(aborted)) {
611 /* target transport has aborted i/o prior */
612 spin_lock(&tfcp_req->reqlock);
613 tfcp_req->active = false;
614 spin_unlock(&tfcp_req->reqlock);
615 tgt_fcpreq->transferred_length = 0;
616 tgt_fcpreq->fcp_error = -ECANCELED;
617 tgt_fcpreq->done(tgt_fcpreq);
622 * if fcpreq is NULL, the I/O has been aborted (from
623 * initiator side). For the target side, act as if all is well
624 * but don't actually move data.
628 case NVMET_FCOP_WRITEDATA:
629 xfrlen = tgt_fcpreq->transfer_length;
631 fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
632 fcpreq->first_sgl, tgt_fcpreq->offset,
634 fcpreq->transferred_length += xfrlen;
638 case NVMET_FCOP_READDATA:
639 case NVMET_FCOP_READDATA_RSP:
640 xfrlen = tgt_fcpreq->transfer_length;
642 fcloop_fcp_copy_data(op, tgt_fcpreq->sg,
643 fcpreq->first_sgl, tgt_fcpreq->offset,
645 fcpreq->transferred_length += xfrlen;
647 if (op == NVMET_FCOP_READDATA)
650 /* Fall-Thru to RSP handling */
654 rsplen = ((fcpreq->rsplen < tgt_fcpreq->rsplen) ?
655 fcpreq->rsplen : tgt_fcpreq->rsplen);
656 memcpy(fcpreq->rspaddr, tgt_fcpreq->rspaddr, rsplen);
657 if (rsplen < tgt_fcpreq->rsplen)
659 fcpreq->rcv_rsplen = rsplen;
662 tfcp_req->status = 0;
670 spin_lock(&tfcp_req->reqlock);
671 tfcp_req->active = false;
672 spin_unlock(&tfcp_req->reqlock);
674 tgt_fcpreq->transferred_length = xfrlen;
675 tgt_fcpreq->fcp_error = fcp_err;
676 tgt_fcpreq->done(tgt_fcpreq);
682 fcloop_tgt_fcp_abort(struct nvmet_fc_target_port *tgtport,
683 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
685 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
688 * mark aborted only in case there were 2 threads in transport
689 * (one doing io, other doing abort) and only kills ops posted
690 * after the abort request
692 spin_lock(&tfcp_req->reqlock);
693 tfcp_req->aborted = true;
694 spin_unlock(&tfcp_req->reqlock);
696 tfcp_req->status = NVME_SC_INTERNAL;
699 * nothing more to do. If io wasn't active, the transport should
700 * immediately call the req_release. If it was active, the op
701 * will complete, and the lldd should call req_release.
706 fcloop_fcp_req_release(struct nvmet_fc_target_port *tgtport,
707 struct nvmefc_tgt_fcp_req *tgt_fcpreq)
709 struct fcloop_fcpreq *tfcp_req = tgt_fcp_req_to_fcpreq(tgt_fcpreq);
711 schedule_work(&tfcp_req->tio_done_work);
715 fcloop_ls_abort(struct nvme_fc_local_port *localport,
716 struct nvme_fc_remote_port *remoteport,
717 struct nvmefc_ls_req *lsreq)
722 fcloop_fcp_abort(struct nvme_fc_local_port *localport,
723 struct nvme_fc_remote_port *remoteport,
724 void *hw_queue_handle,
725 struct nvmefc_fcp_req *fcpreq)
727 struct fcloop_ini_fcpreq *inireq = fcpreq->private;
728 struct fcloop_fcpreq *tfcp_req;
731 spin_lock(&inireq->inilock);
732 tfcp_req = inireq->tfcp_req;
734 fcloop_tfcp_req_get(tfcp_req);
735 spin_unlock(&inireq->inilock);
738 /* abort has already been called */
741 /* break initiator/target relationship for io */
742 spin_lock(&tfcp_req->reqlock);
743 switch (tfcp_req->inistate) {
746 tfcp_req->inistate = INI_IO_ABORTED;
748 case INI_IO_COMPLETED:
752 spin_unlock(&tfcp_req->reqlock);
756 spin_unlock(&tfcp_req->reqlock);
759 /* leave the reference while the work item is scheduled */
760 WARN_ON(!schedule_work(&tfcp_req->abort_rcv_work));
763 * as the io has already had the done callback made,
764 * nothing more to do. So release the reference taken above
766 fcloop_tfcp_req_put(tfcp_req);
771 fcloop_nport_free(struct kref *ref)
773 struct fcloop_nport *nport =
774 container_of(ref, struct fcloop_nport, ref);
777 spin_lock_irqsave(&fcloop_lock, flags);
778 list_del(&nport->nport_list);
779 spin_unlock_irqrestore(&fcloop_lock, flags);
785 fcloop_nport_put(struct fcloop_nport *nport)
787 kref_put(&nport->ref, fcloop_nport_free);
791 fcloop_nport_get(struct fcloop_nport *nport)
793 return kref_get_unless_zero(&nport->ref);
797 fcloop_localport_delete(struct nvme_fc_local_port *localport)
799 struct fcloop_lport_priv *lport_priv = localport->private;
800 struct fcloop_lport *lport = lport_priv->lport;
802 /* release any threads waiting for the unreg to complete */
803 complete(&lport->unreg_done);
807 fcloop_remoteport_delete(struct nvme_fc_remote_port *remoteport)
809 struct fcloop_rport *rport = remoteport->private;
811 fcloop_nport_put(rport->nport);
815 fcloop_targetport_delete(struct nvmet_fc_target_port *targetport)
817 struct fcloop_tport *tport = targetport->private;
819 fcloop_nport_put(tport->nport);
822 #define FCLOOP_HW_QUEUES 4
823 #define FCLOOP_SGL_SEGS 256
824 #define FCLOOP_DMABOUND_4G 0xFFFFFFFF
826 static struct nvme_fc_port_template fctemplate = {
827 .localport_delete = fcloop_localport_delete,
828 .remoteport_delete = fcloop_remoteport_delete,
829 .create_queue = fcloop_create_queue,
830 .delete_queue = fcloop_delete_queue,
831 .ls_req = fcloop_ls_req,
832 .fcp_io = fcloop_fcp_req,
833 .ls_abort = fcloop_ls_abort,
834 .fcp_abort = fcloop_fcp_abort,
835 .max_hw_queues = FCLOOP_HW_QUEUES,
836 .max_sgl_segments = FCLOOP_SGL_SEGS,
837 .max_dif_sgl_segments = FCLOOP_SGL_SEGS,
838 .dma_boundary = FCLOOP_DMABOUND_4G,
839 /* sizes of additional private data for data structures */
840 .local_priv_sz = sizeof(struct fcloop_lport_priv),
841 .remote_priv_sz = sizeof(struct fcloop_rport),
842 .lsrqst_priv_sz = sizeof(struct fcloop_lsreq),
843 .fcprqst_priv_sz = sizeof(struct fcloop_ini_fcpreq),
846 static struct nvmet_fc_target_template tgttemplate = {
847 .targetport_delete = fcloop_targetport_delete,
848 .xmt_ls_rsp = fcloop_xmt_ls_rsp,
849 .fcp_op = fcloop_fcp_op,
850 .fcp_abort = fcloop_tgt_fcp_abort,
851 .fcp_req_release = fcloop_fcp_req_release,
852 .max_hw_queues = FCLOOP_HW_QUEUES,
853 .max_sgl_segments = FCLOOP_SGL_SEGS,
854 .max_dif_sgl_segments = FCLOOP_SGL_SEGS,
855 .dma_boundary = FCLOOP_DMABOUND_4G,
856 /* optional features */
857 .target_features = 0,
858 /* sizes of additional private data for data structures */
859 .target_priv_sz = sizeof(struct fcloop_tport),
863 fcloop_create_local_port(struct device *dev, struct device_attribute *attr,
864 const char *buf, size_t count)
866 struct nvme_fc_port_info pinfo;
867 struct fcloop_ctrl_options *opts;
868 struct nvme_fc_local_port *localport;
869 struct fcloop_lport *lport;
870 struct fcloop_lport_priv *lport_priv;
874 lport = kzalloc(sizeof(*lport), GFP_KERNEL);
878 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
882 ret = fcloop_parse_options(opts, buf);
886 /* everything there ? */
887 if ((opts->mask & LPORT_OPTS) != LPORT_OPTS) {
892 memset(&pinfo, 0, sizeof(pinfo));
893 pinfo.node_name = opts->wwnn;
894 pinfo.port_name = opts->wwpn;
895 pinfo.port_role = opts->roles;
896 pinfo.port_id = opts->fcaddr;
898 ret = nvme_fc_register_localport(&pinfo, &fctemplate, NULL, &localport);
901 lport_priv = localport->private;
902 lport_priv->lport = lport;
904 lport->localport = localport;
905 INIT_LIST_HEAD(&lport->lport_list);
907 spin_lock_irqsave(&fcloop_lock, flags);
908 list_add_tail(&lport->lport_list, &fcloop_lports);
909 spin_unlock_irqrestore(&fcloop_lock, flags);
915 /* free only if we're going to fail */
919 return ret ? ret : count;
924 __unlink_local_port(struct fcloop_lport *lport)
926 list_del(&lport->lport_list);
930 __wait_localport_unreg(struct fcloop_lport *lport)
934 init_completion(&lport->unreg_done);
936 ret = nvme_fc_unregister_localport(lport->localport);
938 wait_for_completion(&lport->unreg_done);
947 fcloop_delete_local_port(struct device *dev, struct device_attribute *attr,
948 const char *buf, size_t count)
950 struct fcloop_lport *tlport, *lport = NULL;
951 u64 nodename, portname;
955 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
959 spin_lock_irqsave(&fcloop_lock, flags);
961 list_for_each_entry(tlport, &fcloop_lports, lport_list) {
962 if (tlport->localport->node_name == nodename &&
963 tlport->localport->port_name == portname) {
965 __unlink_local_port(lport);
969 spin_unlock_irqrestore(&fcloop_lock, flags);
974 ret = __wait_localport_unreg(lport);
976 return ret ? ret : count;
979 static struct fcloop_nport *
980 fcloop_alloc_nport(const char *buf, size_t count, bool remoteport)
982 struct fcloop_nport *newnport, *nport = NULL;
983 struct fcloop_lport *tmplport, *lport = NULL;
984 struct fcloop_ctrl_options *opts;
986 u32 opts_mask = (remoteport) ? RPORT_OPTS : TGTPORT_OPTS;
989 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
993 ret = fcloop_parse_options(opts, buf);
997 /* everything there ? */
998 if ((opts->mask & opts_mask) != opts_mask) {
1003 newnport = kzalloc(sizeof(*newnport), GFP_KERNEL);
1007 INIT_LIST_HEAD(&newnport->nport_list);
1008 newnport->node_name = opts->wwnn;
1009 newnport->port_name = opts->wwpn;
1010 if (opts->mask & NVMF_OPT_ROLES)
1011 newnport->port_role = opts->roles;
1012 if (opts->mask & NVMF_OPT_FCADDR)
1013 newnport->port_id = opts->fcaddr;
1014 kref_init(&newnport->ref);
1016 spin_lock_irqsave(&fcloop_lock, flags);
1018 list_for_each_entry(tmplport, &fcloop_lports, lport_list) {
1019 if (tmplport->localport->node_name == opts->wwnn &&
1020 tmplport->localport->port_name == opts->wwpn)
1021 goto out_invalid_opts;
1023 if (tmplport->localport->node_name == opts->lpwwnn &&
1024 tmplport->localport->port_name == opts->lpwwpn)
1030 goto out_invalid_opts;
1031 newnport->lport = lport;
1034 list_for_each_entry(nport, &fcloop_nports, nport_list) {
1035 if (nport->node_name == opts->wwnn &&
1036 nport->port_name == opts->wwpn) {
1037 if ((remoteport && nport->rport) ||
1038 (!remoteport && nport->tport)) {
1040 goto out_invalid_opts;
1043 fcloop_nport_get(nport);
1045 spin_unlock_irqrestore(&fcloop_lock, flags);
1048 nport->lport = lport;
1049 if (opts->mask & NVMF_OPT_ROLES)
1050 nport->port_role = opts->roles;
1051 if (opts->mask & NVMF_OPT_FCADDR)
1052 nport->port_id = opts->fcaddr;
1053 goto out_free_newnport;
1057 list_add_tail(&newnport->nport_list, &fcloop_nports);
1059 spin_unlock_irqrestore(&fcloop_lock, flags);
1065 spin_unlock_irqrestore(&fcloop_lock, flags);
1074 fcloop_create_remote_port(struct device *dev, struct device_attribute *attr,
1075 const char *buf, size_t count)
1077 struct nvme_fc_remote_port *remoteport;
1078 struct fcloop_nport *nport;
1079 struct fcloop_rport *rport;
1080 struct nvme_fc_port_info pinfo;
1083 nport = fcloop_alloc_nport(buf, count, true);
1087 memset(&pinfo, 0, sizeof(pinfo));
1088 pinfo.node_name = nport->node_name;
1089 pinfo.port_name = nport->port_name;
1090 pinfo.port_role = nport->port_role;
1091 pinfo.port_id = nport->port_id;
1093 ret = nvme_fc_register_remoteport(nport->lport->localport,
1094 &pinfo, &remoteport);
1095 if (ret || !remoteport) {
1096 fcloop_nport_put(nport);
1101 rport = remoteport->private;
1102 rport->remoteport = remoteport;
1103 rport->targetport = (nport->tport) ? nport->tport->targetport : NULL;
1105 nport->tport->remoteport = remoteport;
1106 nport->tport->lport = nport->lport;
1108 rport->nport = nport;
1109 rport->lport = nport->lport;
1110 nport->rport = rport;
1116 static struct fcloop_rport *
1117 __unlink_remote_port(struct fcloop_nport *nport)
1119 struct fcloop_rport *rport = nport->rport;
1121 if (rport && nport->tport)
1122 nport->tport->remoteport = NULL;
1123 nport->rport = NULL;
1129 __remoteport_unreg(struct fcloop_nport *nport, struct fcloop_rport *rport)
1134 return nvme_fc_unregister_remoteport(rport->remoteport);
1138 fcloop_delete_remote_port(struct device *dev, struct device_attribute *attr,
1139 const char *buf, size_t count)
1141 struct fcloop_nport *nport = NULL, *tmpport;
1142 static struct fcloop_rport *rport;
1143 u64 nodename, portname;
1144 unsigned long flags;
1147 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1151 spin_lock_irqsave(&fcloop_lock, flags);
1153 list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
1154 if (tmpport->node_name == nodename &&
1155 tmpport->port_name == portname && tmpport->rport) {
1157 rport = __unlink_remote_port(nport);
1162 spin_unlock_irqrestore(&fcloop_lock, flags);
1167 ret = __remoteport_unreg(nport, rport);
1169 return ret ? ret : count;
1173 fcloop_create_target_port(struct device *dev, struct device_attribute *attr,
1174 const char *buf, size_t count)
1176 struct nvmet_fc_target_port *targetport;
1177 struct fcloop_nport *nport;
1178 struct fcloop_tport *tport;
1179 struct nvmet_fc_port_info tinfo;
1182 nport = fcloop_alloc_nport(buf, count, false);
1186 tinfo.node_name = nport->node_name;
1187 tinfo.port_name = nport->port_name;
1188 tinfo.port_id = nport->port_id;
1190 ret = nvmet_fc_register_targetport(&tinfo, &tgttemplate, NULL,
1193 fcloop_nport_put(nport);
1198 tport = targetport->private;
1199 tport->targetport = targetport;
1200 tport->remoteport = (nport->rport) ? nport->rport->remoteport : NULL;
1202 nport->rport->targetport = targetport;
1203 tport->nport = nport;
1204 tport->lport = nport->lport;
1205 nport->tport = tport;
1211 static struct fcloop_tport *
1212 __unlink_target_port(struct fcloop_nport *nport)
1214 struct fcloop_tport *tport = nport->tport;
1216 if (tport && nport->rport)
1217 nport->rport->targetport = NULL;
1218 nport->tport = NULL;
1224 __targetport_unreg(struct fcloop_nport *nport, struct fcloop_tport *tport)
1229 return nvmet_fc_unregister_targetport(tport->targetport);
1233 fcloop_delete_target_port(struct device *dev, struct device_attribute *attr,
1234 const char *buf, size_t count)
1236 struct fcloop_nport *nport = NULL, *tmpport;
1237 struct fcloop_tport *tport = NULL;
1238 u64 nodename, portname;
1239 unsigned long flags;
1242 ret = fcloop_parse_nm_options(dev, &nodename, &portname, buf);
1246 spin_lock_irqsave(&fcloop_lock, flags);
1248 list_for_each_entry(tmpport, &fcloop_nports, nport_list) {
1249 if (tmpport->node_name == nodename &&
1250 tmpport->port_name == portname && tmpport->tport) {
1252 tport = __unlink_target_port(nport);
1257 spin_unlock_irqrestore(&fcloop_lock, flags);
1262 ret = __targetport_unreg(nport, tport);
1264 return ret ? ret : count;
1268 static DEVICE_ATTR(add_local_port, 0200, NULL, fcloop_create_local_port);
1269 static DEVICE_ATTR(del_local_port, 0200, NULL, fcloop_delete_local_port);
1270 static DEVICE_ATTR(add_remote_port, 0200, NULL, fcloop_create_remote_port);
1271 static DEVICE_ATTR(del_remote_port, 0200, NULL, fcloop_delete_remote_port);
1272 static DEVICE_ATTR(add_target_port, 0200, NULL, fcloop_create_target_port);
1273 static DEVICE_ATTR(del_target_port, 0200, NULL, fcloop_delete_target_port);
1275 static struct attribute *fcloop_dev_attrs[] = {
1276 &dev_attr_add_local_port.attr,
1277 &dev_attr_del_local_port.attr,
1278 &dev_attr_add_remote_port.attr,
1279 &dev_attr_del_remote_port.attr,
1280 &dev_attr_add_target_port.attr,
1281 &dev_attr_del_target_port.attr,
1285 static struct attribute_group fclopp_dev_attrs_group = {
1286 .attrs = fcloop_dev_attrs,
1289 static const struct attribute_group *fcloop_dev_attr_groups[] = {
1290 &fclopp_dev_attrs_group,
1294 static struct class *fcloop_class;
1295 static struct device *fcloop_device;
1298 static int __init fcloop_init(void)
1302 fcloop_class = class_create(THIS_MODULE, "fcloop");
1303 if (IS_ERR(fcloop_class)) {
1304 pr_err("couldn't register class fcloop\n");
1305 ret = PTR_ERR(fcloop_class);
1309 fcloop_device = device_create_with_groups(
1310 fcloop_class, NULL, MKDEV(0, 0), NULL,
1311 fcloop_dev_attr_groups, "ctl");
1312 if (IS_ERR(fcloop_device)) {
1313 pr_err("couldn't create ctl device!\n");
1314 ret = PTR_ERR(fcloop_device);
1315 goto out_destroy_class;
1318 get_device(fcloop_device);
1323 class_destroy(fcloop_class);
1327 static void __exit fcloop_exit(void)
1329 struct fcloop_lport *lport;
1330 struct fcloop_nport *nport;
1331 struct fcloop_tport *tport;
1332 struct fcloop_rport *rport;
1333 unsigned long flags;
1336 spin_lock_irqsave(&fcloop_lock, flags);
1339 nport = list_first_entry_or_null(&fcloop_nports,
1340 typeof(*nport), nport_list);
1344 tport = __unlink_target_port(nport);
1345 rport = __unlink_remote_port(nport);
1347 spin_unlock_irqrestore(&fcloop_lock, flags);
1349 ret = __targetport_unreg(nport, tport);
1351 pr_warn("%s: Failed deleting target port\n", __func__);
1353 ret = __remoteport_unreg(nport, rport);
1355 pr_warn("%s: Failed deleting remote port\n", __func__);
1357 spin_lock_irqsave(&fcloop_lock, flags);
1361 lport = list_first_entry_or_null(&fcloop_lports,
1362 typeof(*lport), lport_list);
1366 __unlink_local_port(lport);
1368 spin_unlock_irqrestore(&fcloop_lock, flags);
1370 ret = __wait_localport_unreg(lport);
1372 pr_warn("%s: Failed deleting local port\n", __func__);
1374 spin_lock_irqsave(&fcloop_lock, flags);
1377 spin_unlock_irqrestore(&fcloop_lock, flags);
1379 put_device(fcloop_device);
1381 device_destroy(fcloop_class, MKDEV(0, 0));
1382 class_destroy(fcloop_class);
1385 module_init(fcloop_init);
1386 module_exit(fcloop_exit);
1388 MODULE_LICENSE("GPL v2");