Commit | Line | Data |
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057cbf49 NB |
1 | /******************************************************************************* |
2 | * Vhost kernel TCM fabric driver for virtio SCSI initiators | |
3 | * | |
4 | * (C) Copyright 2010-2012 RisingTide Systems LLC. | |
5 | * (C) Copyright 2010-2012 IBM Corp. | |
6 | * | |
7 | * Licensed to the Linux Foundation under the General Public License (GPL) version 2. | |
8 | * | |
9 | * Authors: Nicholas A. Bellinger <nab@risingtidesystems.com> | |
10 | * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | ****************************************************************************/ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <generated/utsrelease.h> | |
27 | #include <linux/utsname.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/configfs.h> | |
34 | #include <linux/ctype.h> | |
35 | #include <linux/compat.h> | |
36 | #include <linux/eventfd.h> | |
057cbf49 NB |
37 | #include <linux/fs.h> |
38 | #include <linux/miscdevice.h> | |
39 | #include <asm/unaligned.h> | |
40 | #include <scsi/scsi.h> | |
41 | #include <scsi/scsi_tcq.h> | |
42 | #include <target/target_core_base.h> | |
43 | #include <target/target_core_fabric.h> | |
44 | #include <target/target_core_fabric_configfs.h> | |
45 | #include <target/target_core_configfs.h> | |
46 | #include <target/configfs_macros.h> | |
47 | #include <linux/vhost.h> | |
48 | #include <linux/virtio_net.h> /* TODO vhost.h currently depends on this */ | |
49 | #include <linux/virtio_scsi.h> | |
9d6064a3 | 50 | #include <linux/llist.h> |
057cbf49 NB |
51 | |
52 | #include "vhost.c" | |
53 | #include "vhost.h" | |
54 | #include "tcm_vhost.h" | |
55 | ||
101998f6 NB |
56 | enum { |
57 | VHOST_SCSI_VQ_CTL = 0, | |
58 | VHOST_SCSI_VQ_EVT = 1, | |
59 | VHOST_SCSI_VQ_IO = 2, | |
60 | }; | |
61 | ||
057cbf49 | 62 | struct vhost_scsi { |
101998f6 | 63 | struct tcm_vhost_tpg *vs_tpg; /* Protected by vhost_scsi->dev.mutex */ |
057cbf49 NB |
64 | struct vhost_dev dev; |
65 | struct vhost_virtqueue vqs[3]; | |
66 | ||
67 | struct vhost_work vs_completion_work; /* cmd completion work item */ | |
9d6064a3 | 68 | struct llist_head vs_completion_list; /* cmd completion queue */ |
057cbf49 NB |
69 | }; |
70 | ||
71 | /* Local pointer to allocated TCM configfs fabric module */ | |
72 | static struct target_fabric_configfs *tcm_vhost_fabric_configfs; | |
73 | ||
74 | static struct workqueue_struct *tcm_vhost_workqueue; | |
75 | ||
76 | /* Global spinlock to protect tcm_vhost TPG list for vhost IOCTL access */ | |
77 | static DEFINE_MUTEX(tcm_vhost_mutex); | |
78 | static LIST_HEAD(tcm_vhost_list); | |
79 | ||
765b34fd AH |
80 | static int iov_num_pages(struct iovec *iov) |
81 | { | |
82 | return (PAGE_ALIGN((unsigned long)iov->iov_base + iov->iov_len) - | |
83 | ((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT; | |
84 | } | |
85 | ||
057cbf49 NB |
86 | static int tcm_vhost_check_true(struct se_portal_group *se_tpg) |
87 | { | |
88 | return 1; | |
89 | } | |
90 | ||
91 | static int tcm_vhost_check_false(struct se_portal_group *se_tpg) | |
92 | { | |
93 | return 0; | |
94 | } | |
95 | ||
96 | static char *tcm_vhost_get_fabric_name(void) | |
97 | { | |
98 | return "vhost"; | |
99 | } | |
100 | ||
101 | static u8 tcm_vhost_get_fabric_proto_ident(struct se_portal_group *se_tpg) | |
102 | { | |
103 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
104 | struct tcm_vhost_tpg, se_tpg); | |
105 | struct tcm_vhost_tport *tport = tpg->tport; | |
106 | ||
107 | switch (tport->tport_proto_id) { | |
108 | case SCSI_PROTOCOL_SAS: | |
109 | return sas_get_fabric_proto_ident(se_tpg); | |
110 | case SCSI_PROTOCOL_FCP: | |
111 | return fc_get_fabric_proto_ident(se_tpg); | |
112 | case SCSI_PROTOCOL_ISCSI: | |
113 | return iscsi_get_fabric_proto_ident(se_tpg); | |
114 | default: | |
115 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
116 | " SAS emulation\n", tport->tport_proto_id); | |
117 | break; | |
118 | } | |
119 | ||
120 | return sas_get_fabric_proto_ident(se_tpg); | |
121 | } | |
122 | ||
123 | static char *tcm_vhost_get_fabric_wwn(struct se_portal_group *se_tpg) | |
124 | { | |
125 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
126 | struct tcm_vhost_tpg, se_tpg); | |
127 | struct tcm_vhost_tport *tport = tpg->tport; | |
128 | ||
129 | return &tport->tport_name[0]; | |
130 | } | |
131 | ||
132 | static u16 tcm_vhost_get_tag(struct se_portal_group *se_tpg) | |
133 | { | |
134 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
135 | struct tcm_vhost_tpg, se_tpg); | |
136 | return tpg->tport_tpgt; | |
137 | } | |
138 | ||
139 | static u32 tcm_vhost_get_default_depth(struct se_portal_group *se_tpg) | |
140 | { | |
141 | return 1; | |
142 | } | |
143 | ||
101998f6 | 144 | static u32 tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg, |
057cbf49 NB |
145 | struct se_node_acl *se_nacl, |
146 | struct t10_pr_registration *pr_reg, | |
147 | int *format_code, | |
148 | unsigned char *buf) | |
149 | { | |
150 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
151 | struct tcm_vhost_tpg, se_tpg); | |
152 | struct tcm_vhost_tport *tport = tpg->tport; | |
153 | ||
154 | switch (tport->tport_proto_id) { | |
155 | case SCSI_PROTOCOL_SAS: | |
156 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
157 | format_code, buf); | |
158 | case SCSI_PROTOCOL_FCP: | |
159 | return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
160 | format_code, buf); | |
161 | case SCSI_PROTOCOL_ISCSI: | |
162 | return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
163 | format_code, buf); | |
164 | default: | |
165 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
166 | " SAS emulation\n", tport->tport_proto_id); | |
167 | break; | |
168 | } | |
169 | ||
170 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
171 | format_code, buf); | |
172 | } | |
173 | ||
101998f6 | 174 | static u32 tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg, |
057cbf49 NB |
175 | struct se_node_acl *se_nacl, |
176 | struct t10_pr_registration *pr_reg, | |
177 | int *format_code) | |
178 | { | |
179 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
180 | struct tcm_vhost_tpg, se_tpg); | |
181 | struct tcm_vhost_tport *tport = tpg->tport; | |
182 | ||
183 | switch (tport->tport_proto_id) { | |
184 | case SCSI_PROTOCOL_SAS: | |
185 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
186 | format_code); | |
187 | case SCSI_PROTOCOL_FCP: | |
188 | return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
189 | format_code); | |
190 | case SCSI_PROTOCOL_ISCSI: | |
191 | return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
192 | format_code); | |
193 | default: | |
194 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
195 | " SAS emulation\n", tport->tport_proto_id); | |
196 | break; | |
197 | } | |
198 | ||
199 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
200 | format_code); | |
201 | } | |
202 | ||
101998f6 | 203 | static char *tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg, |
057cbf49 NB |
204 | const char *buf, |
205 | u32 *out_tid_len, | |
206 | char **port_nexus_ptr) | |
207 | { | |
208 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
209 | struct tcm_vhost_tpg, se_tpg); | |
210 | struct tcm_vhost_tport *tport = tpg->tport; | |
211 | ||
212 | switch (tport->tport_proto_id) { | |
213 | case SCSI_PROTOCOL_SAS: | |
214 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
215 | port_nexus_ptr); | |
216 | case SCSI_PROTOCOL_FCP: | |
217 | return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
218 | port_nexus_ptr); | |
219 | case SCSI_PROTOCOL_ISCSI: | |
220 | return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
221 | port_nexus_ptr); | |
222 | default: | |
223 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
224 | " SAS emulation\n", tport->tport_proto_id); | |
225 | break; | |
226 | } | |
227 | ||
228 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
229 | port_nexus_ptr); | |
230 | } | |
231 | ||
232 | static struct se_node_acl *tcm_vhost_alloc_fabric_acl( | |
233 | struct se_portal_group *se_tpg) | |
234 | { | |
235 | struct tcm_vhost_nacl *nacl; | |
236 | ||
237 | nacl = kzalloc(sizeof(struct tcm_vhost_nacl), GFP_KERNEL); | |
238 | if (!nacl) { | |
744627e9 | 239 | pr_err("Unable to allocate struct tcm_vhost_nacl\n"); |
057cbf49 NB |
240 | return NULL; |
241 | } | |
242 | ||
243 | return &nacl->se_node_acl; | |
244 | } | |
245 | ||
101998f6 | 246 | static void tcm_vhost_release_fabric_acl(struct se_portal_group *se_tpg, |
057cbf49 NB |
247 | struct se_node_acl *se_nacl) |
248 | { | |
249 | struct tcm_vhost_nacl *nacl = container_of(se_nacl, | |
250 | struct tcm_vhost_nacl, se_node_acl); | |
251 | kfree(nacl); | |
252 | } | |
253 | ||
254 | static u32 tcm_vhost_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
255 | { | |
256 | return 1; | |
257 | } | |
258 | ||
259 | static void tcm_vhost_release_cmd(struct se_cmd *se_cmd) | |
260 | { | |
261 | return; | |
262 | } | |
263 | ||
264 | static int tcm_vhost_shutdown_session(struct se_session *se_sess) | |
265 | { | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static void tcm_vhost_close_session(struct se_session *se_sess) | |
270 | { | |
271 | return; | |
272 | } | |
273 | ||
274 | static u32 tcm_vhost_sess_get_index(struct se_session *se_sess) | |
275 | { | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static int tcm_vhost_write_pending(struct se_cmd *se_cmd) | |
280 | { | |
281 | /* Go ahead and process the write immediately */ | |
282 | target_execute_cmd(se_cmd); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | static int tcm_vhost_write_pending_status(struct se_cmd *se_cmd) | |
287 | { | |
288 | return 0; | |
289 | } | |
290 | ||
291 | static void tcm_vhost_set_default_node_attrs(struct se_node_acl *nacl) | |
292 | { | |
293 | return; | |
294 | } | |
295 | ||
296 | static u32 tcm_vhost_get_task_tag(struct se_cmd *se_cmd) | |
297 | { | |
298 | return 0; | |
299 | } | |
300 | ||
301 | static int tcm_vhost_get_cmd_state(struct se_cmd *se_cmd) | |
302 | { | |
303 | return 0; | |
304 | } | |
305 | ||
101998f6 NB |
306 | static void vhost_scsi_complete_cmd(struct tcm_vhost_cmd *tv_cmd) |
307 | { | |
308 | struct vhost_scsi *vs = tv_cmd->tvc_vhost; | |
309 | ||
9d6064a3 | 310 | llist_add(&tv_cmd->tvc_completion_list, &vs->vs_completion_list); |
101998f6 NB |
311 | |
312 | vhost_work_queue(&vs->dev, &vs->vs_completion_work); | |
313 | } | |
057cbf49 NB |
314 | |
315 | static int tcm_vhost_queue_data_in(struct se_cmd *se_cmd) | |
316 | { | |
317 | struct tcm_vhost_cmd *tv_cmd = container_of(se_cmd, | |
318 | struct tcm_vhost_cmd, tvc_se_cmd); | |
319 | vhost_scsi_complete_cmd(tv_cmd); | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static int tcm_vhost_queue_status(struct se_cmd *se_cmd) | |
324 | { | |
325 | struct tcm_vhost_cmd *tv_cmd = container_of(se_cmd, | |
326 | struct tcm_vhost_cmd, tvc_se_cmd); | |
327 | vhost_scsi_complete_cmd(tv_cmd); | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static int tcm_vhost_queue_tm_rsp(struct se_cmd *se_cmd) | |
332 | { | |
333 | return 0; | |
334 | } | |
335 | ||
057cbf49 NB |
336 | static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *tv_cmd) |
337 | { | |
338 | struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd; | |
339 | ||
340 | /* TODO locking against target/backend threads? */ | |
341 | transport_generic_free_cmd(se_cmd, 1); | |
342 | ||
343 | if (tv_cmd->tvc_sgl_count) { | |
344 | u32 i; | |
345 | for (i = 0; i < tv_cmd->tvc_sgl_count; i++) | |
346 | put_page(sg_page(&tv_cmd->tvc_sgl[i])); | |
347 | ||
348 | kfree(tv_cmd->tvc_sgl); | |
349 | } | |
350 | ||
351 | kfree(tv_cmd); | |
352 | } | |
353 | ||
057cbf49 NB |
354 | /* Fill in status and signal that we are done processing this command |
355 | * | |
356 | * This is scheduled in the vhost work queue so we are called with the owner | |
357 | * process mm and can access the vring. | |
358 | */ | |
359 | static void vhost_scsi_complete_cmd_work(struct vhost_work *work) | |
360 | { | |
361 | struct vhost_scsi *vs = container_of(work, struct vhost_scsi, | |
362 | vs_completion_work); | |
9d6064a3 | 363 | struct virtio_scsi_cmd_resp v_rsp; |
057cbf49 | 364 | struct tcm_vhost_cmd *tv_cmd; |
9d6064a3 AH |
365 | struct llist_node *llnode; |
366 | struct se_cmd *se_cmd; | |
367 | int ret; | |
057cbf49 | 368 | |
9d6064a3 AH |
369 | llnode = llist_del_all(&vs->vs_completion_list); |
370 | while (llnode) { | |
371 | tv_cmd = llist_entry(llnode, struct tcm_vhost_cmd, | |
372 | tvc_completion_list); | |
373 | llnode = llist_next(llnode); | |
374 | se_cmd = &tv_cmd->tvc_se_cmd; | |
057cbf49 NB |
375 | |
376 | pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__, | |
377 | tv_cmd, se_cmd->residual_count, se_cmd->scsi_status); | |
378 | ||
379 | memset(&v_rsp, 0, sizeof(v_rsp)); | |
380 | v_rsp.resid = se_cmd->residual_count; | |
381 | /* TODO is status_qualifier field needed? */ | |
382 | v_rsp.status = se_cmd->scsi_status; | |
383 | v_rsp.sense_len = se_cmd->scsi_sense_length; | |
384 | memcpy(v_rsp.sense, tv_cmd->tvc_sense_buf, | |
385 | v_rsp.sense_len); | |
386 | ret = copy_to_user(tv_cmd->tvc_resp, &v_rsp, sizeof(v_rsp)); | |
387 | if (likely(ret == 0)) | |
388 | vhost_add_used(&vs->vqs[2], tv_cmd->tvc_vq_desc, 0); | |
389 | else | |
390 | pr_err("Faulted on virtio_scsi_cmd_resp\n"); | |
391 | ||
392 | vhost_scsi_free_cmd(tv_cmd); | |
393 | } | |
394 | ||
395 | vhost_signal(&vs->dev, &vs->vqs[2]); | |
396 | } | |
397 | ||
057cbf49 NB |
398 | static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd( |
399 | struct tcm_vhost_tpg *tv_tpg, | |
400 | struct virtio_scsi_cmd_req *v_req, | |
401 | u32 exp_data_len, | |
402 | int data_direction) | |
403 | { | |
404 | struct tcm_vhost_cmd *tv_cmd; | |
405 | struct tcm_vhost_nexus *tv_nexus; | |
057cbf49 NB |
406 | |
407 | tv_nexus = tv_tpg->tpg_nexus; | |
408 | if (!tv_nexus) { | |
409 | pr_err("Unable to locate active struct tcm_vhost_nexus\n"); | |
410 | return ERR_PTR(-EIO); | |
411 | } | |
057cbf49 NB |
412 | |
413 | tv_cmd = kzalloc(sizeof(struct tcm_vhost_cmd), GFP_ATOMIC); | |
414 | if (!tv_cmd) { | |
415 | pr_err("Unable to allocate struct tcm_vhost_cmd\n"); | |
416 | return ERR_PTR(-ENOMEM); | |
417 | } | |
057cbf49 | 418 | tv_cmd->tvc_tag = v_req->tag; |
9f0abc15 NB |
419 | tv_cmd->tvc_task_attr = v_req->task_attr; |
420 | tv_cmd->tvc_exp_data_len = exp_data_len; | |
421 | tv_cmd->tvc_data_direction = data_direction; | |
422 | tv_cmd->tvc_nexus = tv_nexus; | |
057cbf49 | 423 | |
057cbf49 NB |
424 | return tv_cmd; |
425 | } | |
426 | ||
427 | /* | |
428 | * Map a user memory range into a scatterlist | |
429 | * | |
430 | * Returns the number of scatterlist entries used or -errno on error. | |
431 | */ | |
432 | static int vhost_scsi_map_to_sgl(struct scatterlist *sgl, | |
433 | unsigned int sgl_count, void __user *ptr, size_t len, int write) | |
434 | { | |
435 | struct scatterlist *sg = sgl; | |
436 | unsigned int npages = 0; | |
437 | int ret; | |
438 | ||
439 | while (len > 0) { | |
440 | struct page *page; | |
441 | unsigned int offset = (uintptr_t)ptr & ~PAGE_MASK; | |
442 | unsigned int nbytes = min_t(unsigned int, | |
443 | PAGE_SIZE - offset, len); | |
444 | ||
445 | if (npages == sgl_count) { | |
446 | ret = -ENOBUFS; | |
447 | goto err; | |
448 | } | |
449 | ||
450 | ret = get_user_pages_fast((unsigned long)ptr, 1, write, &page); | |
451 | BUG_ON(ret == 0); /* we should either get our page or fail */ | |
452 | if (ret < 0) | |
453 | goto err; | |
454 | ||
455 | sg_set_page(sg, page, nbytes, offset); | |
456 | ptr += nbytes; | |
457 | len -= nbytes; | |
458 | sg++; | |
459 | npages++; | |
460 | } | |
461 | return npages; | |
462 | ||
463 | err: | |
464 | /* Put pages that we hold */ | |
465 | for (sg = sgl; sg != &sgl[npages]; sg++) | |
466 | put_page(sg_page(sg)); | |
467 | return ret; | |
468 | } | |
469 | ||
470 | static int vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *tv_cmd, | |
471 | struct iovec *iov, unsigned int niov, int write) | |
472 | { | |
473 | int ret; | |
474 | unsigned int i; | |
475 | u32 sgl_count; | |
476 | struct scatterlist *sg; | |
477 | ||
478 | /* | |
479 | * Find out how long sglist needs to be | |
480 | */ | |
481 | sgl_count = 0; | |
482 | for (i = 0; i < niov; i++) { | |
483 | sgl_count += (((uintptr_t)iov[i].iov_base + iov[i].iov_len + | |
484 | PAGE_SIZE - 1) >> PAGE_SHIFT) - | |
485 | ((uintptr_t)iov[i].iov_base >> PAGE_SHIFT); | |
486 | } | |
487 | /* TODO overflow checking */ | |
488 | ||
489 | sg = kmalloc(sizeof(tv_cmd->tvc_sgl[0]) * sgl_count, GFP_ATOMIC); | |
490 | if (!sg) | |
491 | return -ENOMEM; | |
f0e0e9bb FW |
492 | pr_debug("%s sg %p sgl_count %u is_err %d\n", __func__, |
493 | sg, sgl_count, !sg); | |
057cbf49 NB |
494 | sg_init_table(sg, sgl_count); |
495 | ||
496 | tv_cmd->tvc_sgl = sg; | |
497 | tv_cmd->tvc_sgl_count = sgl_count; | |
498 | ||
499 | pr_debug("Mapping %u iovecs for %u pages\n", niov, sgl_count); | |
500 | for (i = 0; i < niov; i++) { | |
501 | ret = vhost_scsi_map_to_sgl(sg, sgl_count, iov[i].iov_base, | |
502 | iov[i].iov_len, write); | |
503 | if (ret < 0) { | |
504 | for (i = 0; i < tv_cmd->tvc_sgl_count; i++) | |
505 | put_page(sg_page(&tv_cmd->tvc_sgl[i])); | |
506 | kfree(tv_cmd->tvc_sgl); | |
507 | tv_cmd->tvc_sgl = NULL; | |
508 | tv_cmd->tvc_sgl_count = 0; | |
509 | return ret; | |
510 | } | |
511 | ||
512 | sg += ret; | |
513 | sgl_count -= ret; | |
514 | } | |
515 | return 0; | |
516 | } | |
517 | ||
518 | static void tcm_vhost_submission_work(struct work_struct *work) | |
519 | { | |
520 | struct tcm_vhost_cmd *tv_cmd = | |
521 | container_of(work, struct tcm_vhost_cmd, work); | |
9f0abc15 | 522 | struct tcm_vhost_nexus *tv_nexus; |
057cbf49 NB |
523 | struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd; |
524 | struct scatterlist *sg_ptr, *sg_bidi_ptr = NULL; | |
525 | int rc, sg_no_bidi = 0; | |
057cbf49 NB |
526 | |
527 | if (tv_cmd->tvc_sgl_count) { | |
528 | sg_ptr = tv_cmd->tvc_sgl; | |
057cbf49 NB |
529 | /* FIXME: Fix BIDI operation in tcm_vhost_submission_work() */ |
530 | #if 0 | |
531 | if (se_cmd->se_cmd_flags & SCF_BIDI) { | |
532 | sg_bidi_ptr = NULL; | |
533 | sg_no_bidi = 0; | |
534 | } | |
535 | #endif | |
536 | } else { | |
537 | sg_ptr = NULL; | |
538 | } | |
9f0abc15 NB |
539 | tv_nexus = tv_cmd->tvc_nexus; |
540 | ||
541 | rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess, | |
542 | tv_cmd->tvc_cdb, &tv_cmd->tvc_sense_buf[0], | |
543 | tv_cmd->tvc_lun, tv_cmd->tvc_exp_data_len, | |
544 | tv_cmd->tvc_task_attr, tv_cmd->tvc_data_direction, | |
545 | 0, sg_ptr, tv_cmd->tvc_sgl_count, | |
546 | sg_bidi_ptr, sg_no_bidi); | |
057cbf49 NB |
547 | if (rc < 0) { |
548 | transport_send_check_condition_and_sense(se_cmd, | |
9f0abc15 | 549 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); |
057cbf49 | 550 | transport_generic_free_cmd(se_cmd, 0); |
057cbf49 | 551 | } |
057cbf49 NB |
552 | } |
553 | ||
554 | static void vhost_scsi_handle_vq(struct vhost_scsi *vs) | |
555 | { | |
556 | struct vhost_virtqueue *vq = &vs->vqs[2]; | |
557 | struct virtio_scsi_cmd_req v_req; | |
558 | struct tcm_vhost_tpg *tv_tpg; | |
559 | struct tcm_vhost_cmd *tv_cmd; | |
560 | u32 exp_data_len, data_first, data_num, data_direction; | |
561 | unsigned out, in, i; | |
562 | int head, ret; | |
563 | ||
564 | /* Must use ioctl VHOST_SCSI_SET_ENDPOINT */ | |
565 | tv_tpg = vs->vs_tpg; | |
71f1e45a | 566 | if (unlikely(!tv_tpg)) |
057cbf49 | 567 | return; |
057cbf49 NB |
568 | |
569 | mutex_lock(&vq->mutex); | |
570 | vhost_disable_notify(&vs->dev, vq); | |
571 | ||
572 | for (;;) { | |
573 | head = vhost_get_vq_desc(&vs->dev, vq, vq->iov, | |
574 | ARRAY_SIZE(vq->iov), &out, &in, | |
575 | NULL, NULL); | |
576 | pr_debug("vhost_get_vq_desc: head: %d, out: %u in: %u\n", | |
577 | head, out, in); | |
578 | /* On error, stop handling until the next kick. */ | |
579 | if (unlikely(head < 0)) | |
580 | break; | |
581 | /* Nothing new? Wait for eventfd to tell us they refilled. */ | |
582 | if (head == vq->num) { | |
583 | if (unlikely(vhost_enable_notify(&vs->dev, vq))) { | |
584 | vhost_disable_notify(&vs->dev, vq); | |
585 | continue; | |
586 | } | |
587 | break; | |
588 | } | |
589 | ||
590 | /* FIXME: BIDI operation */ | |
591 | if (out == 1 && in == 1) { | |
592 | data_direction = DMA_NONE; | |
593 | data_first = 0; | |
594 | data_num = 0; | |
595 | } else if (out == 1 && in > 1) { | |
596 | data_direction = DMA_FROM_DEVICE; | |
597 | data_first = out + 1; | |
598 | data_num = in - 1; | |
599 | } else if (out > 1 && in == 1) { | |
600 | data_direction = DMA_TO_DEVICE; | |
601 | data_first = 1; | |
602 | data_num = out - 1; | |
603 | } else { | |
604 | vq_err(vq, "Invalid buffer layout out: %u in: %u\n", | |
605 | out, in); | |
606 | break; | |
607 | } | |
608 | ||
609 | /* | |
610 | * Check for a sane resp buffer so we can report errors to | |
611 | * the guest. | |
612 | */ | |
613 | if (unlikely(vq->iov[out].iov_len != | |
614 | sizeof(struct virtio_scsi_cmd_resp))) { | |
615 | vq_err(vq, "Expecting virtio_scsi_cmd_resp, got %zu" | |
616 | " bytes\n", vq->iov[out].iov_len); | |
617 | break; | |
618 | } | |
619 | ||
620 | if (unlikely(vq->iov[0].iov_len != sizeof(v_req))) { | |
621 | vq_err(vq, "Expecting virtio_scsi_cmd_req, got %zu" | |
622 | " bytes\n", vq->iov[0].iov_len); | |
623 | break; | |
624 | } | |
625 | pr_debug("Calling __copy_from_user: vq->iov[0].iov_base: %p," | |
626 | " len: %zu\n", vq->iov[0].iov_base, sizeof(v_req)); | |
627 | ret = __copy_from_user(&v_req, vq->iov[0].iov_base, | |
628 | sizeof(v_req)); | |
629 | if (unlikely(ret)) { | |
630 | vq_err(vq, "Faulted on virtio_scsi_cmd_req\n"); | |
631 | break; | |
632 | } | |
633 | ||
634 | exp_data_len = 0; | |
635 | for (i = 0; i < data_num; i++) | |
636 | exp_data_len += vq->iov[data_first + i].iov_len; | |
637 | ||
638 | tv_cmd = vhost_scsi_allocate_cmd(tv_tpg, &v_req, | |
639 | exp_data_len, data_direction); | |
640 | if (IS_ERR(tv_cmd)) { | |
641 | vq_err(vq, "vhost_scsi_allocate_cmd failed %ld\n", | |
642 | PTR_ERR(tv_cmd)); | |
643 | break; | |
644 | } | |
645 | pr_debug("Allocated tv_cmd: %p exp_data_len: %d, data_direction" | |
646 | ": %d\n", tv_cmd, exp_data_len, data_direction); | |
647 | ||
648 | tv_cmd->tvc_vhost = vs; | |
649 | ||
650 | if (unlikely(vq->iov[out].iov_len != | |
651 | sizeof(struct virtio_scsi_cmd_resp))) { | |
652 | vq_err(vq, "Expecting virtio_scsi_cmd_resp, got %zu" | |
653 | " bytes, out: %d, in: %d\n", | |
654 | vq->iov[out].iov_len, out, in); | |
655 | break; | |
656 | } | |
657 | ||
658 | tv_cmd->tvc_resp = vq->iov[out].iov_base; | |
659 | ||
660 | /* | |
661 | * Copy in the recieved CDB descriptor into tv_cmd->tvc_cdb | |
662 | * that will be used by tcm_vhost_new_cmd_map() and down into | |
663 | * target_setup_cmd_from_cdb() | |
664 | */ | |
665 | memcpy(tv_cmd->tvc_cdb, v_req.cdb, TCM_VHOST_MAX_CDB_SIZE); | |
666 | /* | |
667 | * Check that the recieved CDB size does not exceeded our | |
668 | * hardcoded max for tcm_vhost | |
669 | */ | |
670 | /* TODO what if cdb was too small for varlen cdb header? */ | |
671 | if (unlikely(scsi_command_size(tv_cmd->tvc_cdb) > | |
672 | TCM_VHOST_MAX_CDB_SIZE)) { | |
673 | vq_err(vq, "Received SCSI CDB with command_size: %d that" | |
674 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", | |
675 | scsi_command_size(tv_cmd->tvc_cdb), | |
676 | TCM_VHOST_MAX_CDB_SIZE); | |
677 | break; /* TODO */ | |
678 | } | |
679 | tv_cmd->tvc_lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF; | |
680 | ||
681 | pr_debug("vhost_scsi got command opcode: %#02x, lun: %d\n", | |
682 | tv_cmd->tvc_cdb[0], tv_cmd->tvc_lun); | |
683 | ||
684 | if (data_direction != DMA_NONE) { | |
685 | ret = vhost_scsi_map_iov_to_sgl(tv_cmd, | |
686 | &vq->iov[data_first], data_num, | |
687 | data_direction == DMA_TO_DEVICE); | |
688 | if (unlikely(ret)) { | |
689 | vq_err(vq, "Failed to map iov to sgl\n"); | |
690 | break; /* TODO */ | |
691 | } | |
692 | } | |
693 | ||
694 | /* | |
695 | * Save the descriptor from vhost_get_vq_desc() to be used to | |
696 | * complete the virtio-scsi request in TCM callback context via | |
697 | * tcm_vhost_queue_data_in() and tcm_vhost_queue_status() | |
698 | */ | |
699 | tv_cmd->tvc_vq_desc = head; | |
700 | /* | |
701 | * Dispatch tv_cmd descriptor for cmwq execution in process | |
702 | * context provided by tcm_vhost_workqueue. This also ensures | |
703 | * tv_cmd is executed on the same kworker CPU as this vhost | |
704 | * thread to gain positive L2 cache locality effects.. | |
705 | */ | |
706 | INIT_WORK(&tv_cmd->work, tcm_vhost_submission_work); | |
707 | queue_work(tcm_vhost_workqueue, &tv_cmd->work); | |
708 | } | |
709 | ||
710 | mutex_unlock(&vq->mutex); | |
711 | } | |
712 | ||
713 | static void vhost_scsi_ctl_handle_kick(struct vhost_work *work) | |
714 | { | |
101998f6 | 715 | pr_debug("%s: The handling func for control queue.\n", __func__); |
057cbf49 NB |
716 | } |
717 | ||
718 | static void vhost_scsi_evt_handle_kick(struct vhost_work *work) | |
719 | { | |
101998f6 | 720 | pr_debug("%s: The handling func for event queue.\n", __func__); |
057cbf49 NB |
721 | } |
722 | ||
723 | static void vhost_scsi_handle_kick(struct vhost_work *work) | |
724 | { | |
725 | struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue, | |
726 | poll.work); | |
727 | struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev); | |
728 | ||
729 | vhost_scsi_handle_vq(vs); | |
730 | } | |
731 | ||
732 | /* | |
733 | * Called from vhost_scsi_ioctl() context to walk the list of available | |
734 | * tcm_vhost_tpg with an active struct tcm_vhost_nexus | |
735 | */ | |
736 | static int vhost_scsi_set_endpoint( | |
737 | struct vhost_scsi *vs, | |
738 | struct vhost_scsi_target *t) | |
739 | { | |
740 | struct tcm_vhost_tport *tv_tport; | |
741 | struct tcm_vhost_tpg *tv_tpg; | |
742 | int index; | |
743 | ||
744 | mutex_lock(&vs->dev.mutex); | |
745 | /* Verify that ring has been setup correctly. */ | |
746 | for (index = 0; index < vs->dev.nvqs; ++index) { | |
747 | /* Verify that ring has been setup correctly. */ | |
748 | if (!vhost_vq_access_ok(&vs->vqs[index])) { | |
749 | mutex_unlock(&vs->dev.mutex); | |
750 | return -EFAULT; | |
751 | } | |
752 | } | |
057cbf49 NB |
753 | mutex_unlock(&vs->dev.mutex); |
754 | ||
755 | mutex_lock(&tcm_vhost_mutex); | |
756 | list_for_each_entry(tv_tpg, &tcm_vhost_list, tv_tpg_list) { | |
757 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
758 | if (!tv_tpg->tpg_nexus) { | |
759 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
760 | continue; | |
761 | } | |
101998f6 | 762 | if (tv_tpg->tv_tpg_vhost_count != 0) { |
057cbf49 NB |
763 | mutex_unlock(&tv_tpg->tv_tpg_mutex); |
764 | continue; | |
765 | } | |
766 | tv_tport = tv_tpg->tport; | |
767 | ||
768 | if (!strcmp(tv_tport->tport_name, t->vhost_wwpn) && | |
769 | (tv_tpg->tport_tpgt == t->vhost_tpgt)) { | |
101998f6 | 770 | tv_tpg->tv_tpg_vhost_count++; |
057cbf49 NB |
771 | mutex_unlock(&tv_tpg->tv_tpg_mutex); |
772 | mutex_unlock(&tcm_vhost_mutex); | |
773 | ||
774 | mutex_lock(&vs->dev.mutex); | |
101998f6 NB |
775 | if (vs->vs_tpg) { |
776 | mutex_unlock(&vs->dev.mutex); | |
777 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
778 | tv_tpg->tv_tpg_vhost_count--; | |
779 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
780 | return -EEXIST; | |
781 | } | |
782 | ||
057cbf49 | 783 | vs->vs_tpg = tv_tpg; |
057cbf49 NB |
784 | smp_mb__after_atomic_inc(); |
785 | mutex_unlock(&vs->dev.mutex); | |
786 | return 0; | |
787 | } | |
788 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
789 | } | |
790 | mutex_unlock(&tcm_vhost_mutex); | |
791 | return -EINVAL; | |
792 | } | |
793 | ||
794 | static int vhost_scsi_clear_endpoint( | |
795 | struct vhost_scsi *vs, | |
796 | struct vhost_scsi_target *t) | |
797 | { | |
798 | struct tcm_vhost_tport *tv_tport; | |
799 | struct tcm_vhost_tpg *tv_tpg; | |
101998f6 | 800 | int index, ret; |
057cbf49 NB |
801 | |
802 | mutex_lock(&vs->dev.mutex); | |
803 | /* Verify that ring has been setup correctly. */ | |
804 | for (index = 0; index < vs->dev.nvqs; ++index) { | |
805 | if (!vhost_vq_access_ok(&vs->vqs[index])) { | |
101998f6 NB |
806 | ret = -EFAULT; |
807 | goto err; | |
057cbf49 NB |
808 | } |
809 | } | |
810 | ||
811 | if (!vs->vs_tpg) { | |
101998f6 NB |
812 | ret = -ENODEV; |
813 | goto err; | |
057cbf49 NB |
814 | } |
815 | tv_tpg = vs->vs_tpg; | |
816 | tv_tport = tv_tpg->tport; | |
817 | ||
818 | if (strcmp(tv_tport->tport_name, t->vhost_wwpn) || | |
819 | (tv_tpg->tport_tpgt != t->vhost_tpgt)) { | |
057cbf49 NB |
820 | pr_warn("tv_tport->tport_name: %s, tv_tpg->tport_tpgt: %hu" |
821 | " does not match t->vhost_wwpn: %s, t->vhost_tpgt: %hu\n", | |
822 | tv_tport->tport_name, tv_tpg->tport_tpgt, | |
823 | t->vhost_wwpn, t->vhost_tpgt); | |
101998f6 NB |
824 | ret = -EINVAL; |
825 | goto err; | |
057cbf49 | 826 | } |
101998f6 | 827 | tv_tpg->tv_tpg_vhost_count--; |
057cbf49 NB |
828 | vs->vs_tpg = NULL; |
829 | mutex_unlock(&vs->dev.mutex); | |
830 | ||
831 | return 0; | |
101998f6 NB |
832 | |
833 | err: | |
834 | mutex_unlock(&vs->dev.mutex); | |
835 | return ret; | |
057cbf49 NB |
836 | } |
837 | ||
838 | static int vhost_scsi_open(struct inode *inode, struct file *f) | |
839 | { | |
840 | struct vhost_scsi *s; | |
841 | int r; | |
842 | ||
843 | s = kzalloc(sizeof(*s), GFP_KERNEL); | |
844 | if (!s) | |
845 | return -ENOMEM; | |
846 | ||
847 | vhost_work_init(&s->vs_completion_work, vhost_scsi_complete_cmd_work); | |
057cbf49 | 848 | |
101998f6 NB |
849 | s->vqs[VHOST_SCSI_VQ_CTL].handle_kick = vhost_scsi_ctl_handle_kick; |
850 | s->vqs[VHOST_SCSI_VQ_EVT].handle_kick = vhost_scsi_evt_handle_kick; | |
851 | s->vqs[VHOST_SCSI_VQ_IO].handle_kick = vhost_scsi_handle_kick; | |
057cbf49 NB |
852 | r = vhost_dev_init(&s->dev, s->vqs, 3); |
853 | if (r < 0) { | |
854 | kfree(s); | |
855 | return r; | |
856 | } | |
857 | ||
858 | f->private_data = s; | |
859 | return 0; | |
860 | } | |
861 | ||
862 | static int vhost_scsi_release(struct inode *inode, struct file *f) | |
863 | { | |
864 | struct vhost_scsi *s = f->private_data; | |
865 | ||
866 | if (s->vs_tpg && s->vs_tpg->tport) { | |
867 | struct vhost_scsi_target backend; | |
868 | ||
869 | memcpy(backend.vhost_wwpn, s->vs_tpg->tport->tport_name, | |
870 | sizeof(backend.vhost_wwpn)); | |
871 | backend.vhost_tpgt = s->vs_tpg->tport_tpgt; | |
872 | vhost_scsi_clear_endpoint(s, &backend); | |
873 | } | |
874 | ||
b211616d | 875 | vhost_dev_stop(&s->dev); |
057cbf49 NB |
876 | vhost_dev_cleanup(&s->dev, false); |
877 | kfree(s); | |
878 | return 0; | |
879 | } | |
880 | ||
101998f6 NB |
881 | static void vhost_scsi_flush_vq(struct vhost_scsi *vs, int index) |
882 | { | |
883 | vhost_poll_flush(&vs->dev.vqs[index].poll); | |
884 | } | |
885 | ||
886 | static void vhost_scsi_flush(struct vhost_scsi *vs) | |
887 | { | |
888 | vhost_scsi_flush_vq(vs, VHOST_SCSI_VQ_CTL); | |
889 | vhost_scsi_flush_vq(vs, VHOST_SCSI_VQ_EVT); | |
890 | vhost_scsi_flush_vq(vs, VHOST_SCSI_VQ_IO); | |
891 | } | |
892 | ||
057cbf49 NB |
893 | static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features) |
894 | { | |
895 | if (features & ~VHOST_FEATURES) | |
896 | return -EOPNOTSUPP; | |
897 | ||
898 | mutex_lock(&vs->dev.mutex); | |
899 | if ((features & (1 << VHOST_F_LOG_ALL)) && | |
900 | !vhost_log_access_ok(&vs->dev)) { | |
901 | mutex_unlock(&vs->dev.mutex); | |
902 | return -EFAULT; | |
903 | } | |
904 | vs->dev.acked_features = features; | |
101998f6 NB |
905 | smp_wmb(); |
906 | vhost_scsi_flush(vs); | |
057cbf49 NB |
907 | mutex_unlock(&vs->dev.mutex); |
908 | return 0; | |
909 | } | |
910 | ||
911 | static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl, | |
912 | unsigned long arg) | |
913 | { | |
914 | struct vhost_scsi *vs = f->private_data; | |
915 | struct vhost_scsi_target backend; | |
916 | void __user *argp = (void __user *)arg; | |
917 | u64 __user *featurep = argp; | |
918 | u64 features; | |
101998f6 | 919 | int r, abi_version = VHOST_SCSI_ABI_VERSION; |
057cbf49 NB |
920 | |
921 | switch (ioctl) { | |
922 | case VHOST_SCSI_SET_ENDPOINT: | |
923 | if (copy_from_user(&backend, argp, sizeof backend)) | |
924 | return -EFAULT; | |
6de7145c MT |
925 | if (backend.reserved != 0) |
926 | return -EOPNOTSUPP; | |
057cbf49 NB |
927 | |
928 | return vhost_scsi_set_endpoint(vs, &backend); | |
929 | case VHOST_SCSI_CLEAR_ENDPOINT: | |
930 | if (copy_from_user(&backend, argp, sizeof backend)) | |
931 | return -EFAULT; | |
6de7145c MT |
932 | if (backend.reserved != 0) |
933 | return -EOPNOTSUPP; | |
057cbf49 NB |
934 | |
935 | return vhost_scsi_clear_endpoint(vs, &backend); | |
936 | case VHOST_SCSI_GET_ABI_VERSION: | |
101998f6 | 937 | if (copy_to_user(argp, &abi_version, sizeof abi_version)) |
057cbf49 NB |
938 | return -EFAULT; |
939 | return 0; | |
940 | case VHOST_GET_FEATURES: | |
941 | features = VHOST_FEATURES; | |
942 | if (copy_to_user(featurep, &features, sizeof features)) | |
943 | return -EFAULT; | |
944 | return 0; | |
945 | case VHOST_SET_FEATURES: | |
946 | if (copy_from_user(&features, featurep, sizeof features)) | |
947 | return -EFAULT; | |
948 | return vhost_scsi_set_features(vs, features); | |
949 | default: | |
950 | mutex_lock(&vs->dev.mutex); | |
935cdee7 MT |
951 | r = vhost_dev_ioctl(&vs->dev, ioctl, argp); |
952 | /* TODO: flush backend after dev ioctl. */ | |
953 | if (r == -ENOIOCTLCMD) | |
954 | r = vhost_vring_ioctl(&vs->dev, ioctl, argp); | |
057cbf49 NB |
955 | mutex_unlock(&vs->dev.mutex); |
956 | return r; | |
957 | } | |
958 | } | |
959 | ||
101998f6 NB |
960 | #ifdef CONFIG_COMPAT |
961 | static long vhost_scsi_compat_ioctl(struct file *f, unsigned int ioctl, | |
962 | unsigned long arg) | |
963 | { | |
964 | return vhost_scsi_ioctl(f, ioctl, (unsigned long)compat_ptr(arg)); | |
965 | } | |
966 | #endif | |
967 | ||
057cbf49 NB |
968 | static const struct file_operations vhost_scsi_fops = { |
969 | .owner = THIS_MODULE, | |
970 | .release = vhost_scsi_release, | |
971 | .unlocked_ioctl = vhost_scsi_ioctl, | |
101998f6 NB |
972 | #ifdef CONFIG_COMPAT |
973 | .compat_ioctl = vhost_scsi_compat_ioctl, | |
974 | #endif | |
057cbf49 NB |
975 | .open = vhost_scsi_open, |
976 | .llseek = noop_llseek, | |
977 | }; | |
978 | ||
979 | static struct miscdevice vhost_scsi_misc = { | |
980 | MISC_DYNAMIC_MINOR, | |
981 | "vhost-scsi", | |
982 | &vhost_scsi_fops, | |
983 | }; | |
984 | ||
985 | static int __init vhost_scsi_register(void) | |
986 | { | |
987 | return misc_register(&vhost_scsi_misc); | |
988 | } | |
989 | ||
990 | static int vhost_scsi_deregister(void) | |
991 | { | |
992 | return misc_deregister(&vhost_scsi_misc); | |
993 | } | |
994 | ||
995 | static char *tcm_vhost_dump_proto_id(struct tcm_vhost_tport *tport) | |
996 | { | |
997 | switch (tport->tport_proto_id) { | |
998 | case SCSI_PROTOCOL_SAS: | |
999 | return "SAS"; | |
1000 | case SCSI_PROTOCOL_FCP: | |
1001 | return "FCP"; | |
1002 | case SCSI_PROTOCOL_ISCSI: | |
1003 | return "iSCSI"; | |
1004 | default: | |
1005 | break; | |
1006 | } | |
1007 | ||
1008 | return "Unknown"; | |
1009 | } | |
1010 | ||
101998f6 | 1011 | static int tcm_vhost_port_link(struct se_portal_group *se_tpg, |
057cbf49 NB |
1012 | struct se_lun *lun) |
1013 | { | |
1014 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1015 | struct tcm_vhost_tpg, se_tpg); | |
1016 | ||
101998f6 NB |
1017 | mutex_lock(&tv_tpg->tv_tpg_mutex); |
1018 | tv_tpg->tv_tpg_port_count++; | |
1019 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
057cbf49 NB |
1020 | |
1021 | return 0; | |
1022 | } | |
1023 | ||
101998f6 | 1024 | static void tcm_vhost_port_unlink(struct se_portal_group *se_tpg, |
057cbf49 NB |
1025 | struct se_lun *se_lun) |
1026 | { | |
1027 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1028 | struct tcm_vhost_tpg, se_tpg); | |
1029 | ||
101998f6 NB |
1030 | mutex_lock(&tv_tpg->tv_tpg_mutex); |
1031 | tv_tpg->tv_tpg_port_count--; | |
1032 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
057cbf49 NB |
1033 | } |
1034 | ||
1035 | static struct se_node_acl *tcm_vhost_make_nodeacl( | |
1036 | struct se_portal_group *se_tpg, | |
1037 | struct config_group *group, | |
1038 | const char *name) | |
1039 | { | |
1040 | struct se_node_acl *se_nacl, *se_nacl_new; | |
1041 | struct tcm_vhost_nacl *nacl; | |
1042 | u64 wwpn = 0; | |
1043 | u32 nexus_depth; | |
1044 | ||
1045 | /* tcm_vhost_parse_wwn(name, &wwpn, 1) < 0) | |
1046 | return ERR_PTR(-EINVAL); */ | |
1047 | se_nacl_new = tcm_vhost_alloc_fabric_acl(se_tpg); | |
1048 | if (!se_nacl_new) | |
1049 | return ERR_PTR(-ENOMEM); | |
1050 | ||
1051 | nexus_depth = 1; | |
1052 | /* | |
1053 | * se_nacl_new may be released by core_tpg_add_initiator_node_acl() | |
1054 | * when converting a NodeACL from demo mode -> explict | |
1055 | */ | |
1056 | se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new, | |
1057 | name, nexus_depth); | |
1058 | if (IS_ERR(se_nacl)) { | |
1059 | tcm_vhost_release_fabric_acl(se_tpg, se_nacl_new); | |
1060 | return se_nacl; | |
1061 | } | |
1062 | /* | |
1063 | * Locate our struct tcm_vhost_nacl and set the FC Nport WWPN | |
1064 | */ | |
1065 | nacl = container_of(se_nacl, struct tcm_vhost_nacl, se_node_acl); | |
1066 | nacl->iport_wwpn = wwpn; | |
1067 | ||
1068 | return se_nacl; | |
1069 | } | |
1070 | ||
1071 | static void tcm_vhost_drop_nodeacl(struct se_node_acl *se_acl) | |
1072 | { | |
1073 | struct tcm_vhost_nacl *nacl = container_of(se_acl, | |
1074 | struct tcm_vhost_nacl, se_node_acl); | |
1075 | core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1); | |
1076 | kfree(nacl); | |
1077 | } | |
1078 | ||
101998f6 | 1079 | static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tv_tpg, |
057cbf49 NB |
1080 | const char *name) |
1081 | { | |
1082 | struct se_portal_group *se_tpg; | |
1083 | struct tcm_vhost_nexus *tv_nexus; | |
1084 | ||
1085 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
1086 | if (tv_tpg->tpg_nexus) { | |
1087 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1088 | pr_debug("tv_tpg->tpg_nexus already exists\n"); | |
1089 | return -EEXIST; | |
1090 | } | |
1091 | se_tpg = &tv_tpg->se_tpg; | |
1092 | ||
1093 | tv_nexus = kzalloc(sizeof(struct tcm_vhost_nexus), GFP_KERNEL); | |
1094 | if (!tv_nexus) { | |
1095 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1096 | pr_err("Unable to allocate struct tcm_vhost_nexus\n"); | |
1097 | return -ENOMEM; | |
1098 | } | |
1099 | /* | |
1100 | * Initialize the struct se_session pointer | |
1101 | */ | |
1102 | tv_nexus->tvn_se_sess = transport_init_session(); | |
1103 | if (IS_ERR(tv_nexus->tvn_se_sess)) { | |
1104 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1105 | kfree(tv_nexus); | |
1106 | return -ENOMEM; | |
1107 | } | |
1108 | /* | |
1109 | * Since we are running in 'demo mode' this call with generate a | |
1110 | * struct se_node_acl for the tcm_vhost struct se_portal_group with | |
1111 | * the SCSI Initiator port name of the passed configfs group 'name'. | |
1112 | */ | |
1113 | tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl( | |
1114 | se_tpg, (unsigned char *)name); | |
1115 | if (!tv_nexus->tvn_se_sess->se_node_acl) { | |
1116 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1117 | pr_debug("core_tpg_check_initiator_node_acl() failed" | |
1118 | " for %s\n", name); | |
1119 | transport_free_session(tv_nexus->tvn_se_sess); | |
1120 | kfree(tv_nexus); | |
1121 | return -ENOMEM; | |
1122 | } | |
1123 | /* | |
101998f6 | 1124 | * Now register the TCM vhost virtual I_T Nexus as active with the |
057cbf49 NB |
1125 | * call to __transport_register_session() |
1126 | */ | |
1127 | __transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl, | |
1128 | tv_nexus->tvn_se_sess, tv_nexus); | |
1129 | tv_tpg->tpg_nexus = tv_nexus; | |
1130 | ||
1131 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
101998f6 | 1135 | static int tcm_vhost_drop_nexus(struct tcm_vhost_tpg *tpg) |
057cbf49 NB |
1136 | { |
1137 | struct se_session *se_sess; | |
1138 | struct tcm_vhost_nexus *tv_nexus; | |
1139 | ||
1140 | mutex_lock(&tpg->tv_tpg_mutex); | |
1141 | tv_nexus = tpg->tpg_nexus; | |
1142 | if (!tv_nexus) { | |
1143 | mutex_unlock(&tpg->tv_tpg_mutex); | |
1144 | return -ENODEV; | |
1145 | } | |
1146 | ||
1147 | se_sess = tv_nexus->tvn_se_sess; | |
1148 | if (!se_sess) { | |
1149 | mutex_unlock(&tpg->tv_tpg_mutex); | |
1150 | return -ENODEV; | |
1151 | } | |
1152 | ||
101998f6 | 1153 | if (tpg->tv_tpg_port_count != 0) { |
057cbf49 | 1154 | mutex_unlock(&tpg->tv_tpg_mutex); |
101998f6 | 1155 | pr_err("Unable to remove TCM_vhost I_T Nexus with" |
057cbf49 | 1156 | " active TPG port count: %d\n", |
101998f6 NB |
1157 | tpg->tv_tpg_port_count); |
1158 | return -EBUSY; | |
057cbf49 NB |
1159 | } |
1160 | ||
101998f6 | 1161 | if (tpg->tv_tpg_vhost_count != 0) { |
057cbf49 | 1162 | mutex_unlock(&tpg->tv_tpg_mutex); |
101998f6 | 1163 | pr_err("Unable to remove TCM_vhost I_T Nexus with" |
057cbf49 | 1164 | " active TPG vhost count: %d\n", |
101998f6 NB |
1165 | tpg->tv_tpg_vhost_count); |
1166 | return -EBUSY; | |
057cbf49 NB |
1167 | } |
1168 | ||
101998f6 | 1169 | pr_debug("TCM_vhost_ConfigFS: Removing I_T Nexus to emulated" |
057cbf49 NB |
1170 | " %s Initiator Port: %s\n", tcm_vhost_dump_proto_id(tpg->tport), |
1171 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1172 | /* | |
101998f6 | 1173 | * Release the SCSI I_T Nexus to the emulated vhost Target Port |
057cbf49 NB |
1174 | */ |
1175 | transport_deregister_session(tv_nexus->tvn_se_sess); | |
1176 | tpg->tpg_nexus = NULL; | |
1177 | mutex_unlock(&tpg->tv_tpg_mutex); | |
1178 | ||
1179 | kfree(tv_nexus); | |
1180 | return 0; | |
1181 | } | |
1182 | ||
101998f6 | 1183 | static ssize_t tcm_vhost_tpg_show_nexus(struct se_portal_group *se_tpg, |
057cbf49 NB |
1184 | char *page) |
1185 | { | |
1186 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1187 | struct tcm_vhost_tpg, se_tpg); | |
1188 | struct tcm_vhost_nexus *tv_nexus; | |
1189 | ssize_t ret; | |
1190 | ||
1191 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
1192 | tv_nexus = tv_tpg->tpg_nexus; | |
1193 | if (!tv_nexus) { | |
1194 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1195 | return -ENODEV; | |
1196 | } | |
1197 | ret = snprintf(page, PAGE_SIZE, "%s\n", | |
1198 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1199 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1200 | ||
1201 | return ret; | |
1202 | } | |
1203 | ||
101998f6 | 1204 | static ssize_t tcm_vhost_tpg_store_nexus(struct se_portal_group *se_tpg, |
057cbf49 NB |
1205 | const char *page, |
1206 | size_t count) | |
1207 | { | |
1208 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1209 | struct tcm_vhost_tpg, se_tpg); | |
1210 | struct tcm_vhost_tport *tport_wwn = tv_tpg->tport; | |
1211 | unsigned char i_port[TCM_VHOST_NAMELEN], *ptr, *port_ptr; | |
1212 | int ret; | |
1213 | /* | |
1214 | * Shutdown the active I_T nexus if 'NULL' is passed.. | |
1215 | */ | |
1216 | if (!strncmp(page, "NULL", 4)) { | |
1217 | ret = tcm_vhost_drop_nexus(tv_tpg); | |
1218 | return (!ret) ? count : ret; | |
1219 | } | |
1220 | /* | |
1221 | * Otherwise make sure the passed virtual Initiator port WWN matches | |
1222 | * the fabric protocol_id set in tcm_vhost_make_tport(), and call | |
1223 | * tcm_vhost_make_nexus(). | |
1224 | */ | |
1225 | if (strlen(page) >= TCM_VHOST_NAMELEN) { | |
1226 | pr_err("Emulated NAA Sas Address: %s, exceeds" | |
1227 | " max: %d\n", page, TCM_VHOST_NAMELEN); | |
1228 | return -EINVAL; | |
1229 | } | |
1230 | snprintf(&i_port[0], TCM_VHOST_NAMELEN, "%s", page); | |
1231 | ||
1232 | ptr = strstr(i_port, "naa."); | |
1233 | if (ptr) { | |
1234 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_SAS) { | |
1235 | pr_err("Passed SAS Initiator Port %s does not" | |
1236 | " match target port protoid: %s\n", i_port, | |
1237 | tcm_vhost_dump_proto_id(tport_wwn)); | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | port_ptr = &i_port[0]; | |
1241 | goto check_newline; | |
1242 | } | |
1243 | ptr = strstr(i_port, "fc."); | |
1244 | if (ptr) { | |
1245 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_FCP) { | |
1246 | pr_err("Passed FCP Initiator Port %s does not" | |
1247 | " match target port protoid: %s\n", i_port, | |
1248 | tcm_vhost_dump_proto_id(tport_wwn)); | |
1249 | return -EINVAL; | |
1250 | } | |
1251 | port_ptr = &i_port[3]; /* Skip over "fc." */ | |
1252 | goto check_newline; | |
1253 | } | |
1254 | ptr = strstr(i_port, "iqn."); | |
1255 | if (ptr) { | |
1256 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_ISCSI) { | |
1257 | pr_err("Passed iSCSI Initiator Port %s does not" | |
1258 | " match target port protoid: %s\n", i_port, | |
1259 | tcm_vhost_dump_proto_id(tport_wwn)); | |
1260 | return -EINVAL; | |
1261 | } | |
1262 | port_ptr = &i_port[0]; | |
1263 | goto check_newline; | |
1264 | } | |
1265 | pr_err("Unable to locate prefix for emulated Initiator Port:" | |
1266 | " %s\n", i_port); | |
1267 | return -EINVAL; | |
1268 | /* | |
1269 | * Clear any trailing newline for the NAA WWN | |
1270 | */ | |
1271 | check_newline: | |
1272 | if (i_port[strlen(i_port)-1] == '\n') | |
1273 | i_port[strlen(i_port)-1] = '\0'; | |
1274 | ||
1275 | ret = tcm_vhost_make_nexus(tv_tpg, port_ptr); | |
1276 | if (ret < 0) | |
1277 | return ret; | |
1278 | ||
1279 | return count; | |
1280 | } | |
1281 | ||
1282 | TF_TPG_BASE_ATTR(tcm_vhost, nexus, S_IRUGO | S_IWUSR); | |
1283 | ||
1284 | static struct configfs_attribute *tcm_vhost_tpg_attrs[] = { | |
1285 | &tcm_vhost_tpg_nexus.attr, | |
1286 | NULL, | |
1287 | }; | |
1288 | ||
101998f6 | 1289 | static struct se_portal_group *tcm_vhost_make_tpg(struct se_wwn *wwn, |
057cbf49 NB |
1290 | struct config_group *group, |
1291 | const char *name) | |
1292 | { | |
1293 | struct tcm_vhost_tport *tport = container_of(wwn, | |
1294 | struct tcm_vhost_tport, tport_wwn); | |
1295 | ||
1296 | struct tcm_vhost_tpg *tpg; | |
1297 | unsigned long tpgt; | |
1298 | int ret; | |
1299 | ||
1300 | if (strstr(name, "tpgt_") != name) | |
1301 | return ERR_PTR(-EINVAL); | |
1302 | if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) | |
1303 | return ERR_PTR(-EINVAL); | |
1304 | ||
1305 | tpg = kzalloc(sizeof(struct tcm_vhost_tpg), GFP_KERNEL); | |
1306 | if (!tpg) { | |
1307 | pr_err("Unable to allocate struct tcm_vhost_tpg"); | |
1308 | return ERR_PTR(-ENOMEM); | |
1309 | } | |
1310 | mutex_init(&tpg->tv_tpg_mutex); | |
1311 | INIT_LIST_HEAD(&tpg->tv_tpg_list); | |
1312 | tpg->tport = tport; | |
1313 | tpg->tport_tpgt = tpgt; | |
1314 | ||
1315 | ret = core_tpg_register(&tcm_vhost_fabric_configfs->tf_ops, wwn, | |
1316 | &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL); | |
1317 | if (ret < 0) { | |
1318 | kfree(tpg); | |
1319 | return NULL; | |
1320 | } | |
1321 | mutex_lock(&tcm_vhost_mutex); | |
1322 | list_add_tail(&tpg->tv_tpg_list, &tcm_vhost_list); | |
1323 | mutex_unlock(&tcm_vhost_mutex); | |
1324 | ||
1325 | return &tpg->se_tpg; | |
1326 | } | |
1327 | ||
1328 | static void tcm_vhost_drop_tpg(struct se_portal_group *se_tpg) | |
1329 | { | |
1330 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
1331 | struct tcm_vhost_tpg, se_tpg); | |
1332 | ||
1333 | mutex_lock(&tcm_vhost_mutex); | |
1334 | list_del(&tpg->tv_tpg_list); | |
1335 | mutex_unlock(&tcm_vhost_mutex); | |
1336 | /* | |
101998f6 | 1337 | * Release the virtual I_T Nexus for this vhost TPG |
057cbf49 NB |
1338 | */ |
1339 | tcm_vhost_drop_nexus(tpg); | |
1340 | /* | |
1341 | * Deregister the se_tpg from TCM.. | |
1342 | */ | |
1343 | core_tpg_deregister(se_tpg); | |
1344 | kfree(tpg); | |
1345 | } | |
1346 | ||
101998f6 | 1347 | static struct se_wwn *tcm_vhost_make_tport(struct target_fabric_configfs *tf, |
057cbf49 NB |
1348 | struct config_group *group, |
1349 | const char *name) | |
1350 | { | |
1351 | struct tcm_vhost_tport *tport; | |
1352 | char *ptr; | |
1353 | u64 wwpn = 0; | |
1354 | int off = 0; | |
1355 | ||
1356 | /* if (tcm_vhost_parse_wwn(name, &wwpn, 1) < 0) | |
1357 | return ERR_PTR(-EINVAL); */ | |
1358 | ||
1359 | tport = kzalloc(sizeof(struct tcm_vhost_tport), GFP_KERNEL); | |
1360 | if (!tport) { | |
1361 | pr_err("Unable to allocate struct tcm_vhost_tport"); | |
1362 | return ERR_PTR(-ENOMEM); | |
1363 | } | |
1364 | tport->tport_wwpn = wwpn; | |
1365 | /* | |
1366 | * Determine the emulated Protocol Identifier and Target Port Name | |
1367 | * based on the incoming configfs directory name. | |
1368 | */ | |
1369 | ptr = strstr(name, "naa."); | |
1370 | if (ptr) { | |
1371 | tport->tport_proto_id = SCSI_PROTOCOL_SAS; | |
1372 | goto check_len; | |
1373 | } | |
1374 | ptr = strstr(name, "fc."); | |
1375 | if (ptr) { | |
1376 | tport->tport_proto_id = SCSI_PROTOCOL_FCP; | |
1377 | off = 3; /* Skip over "fc." */ | |
1378 | goto check_len; | |
1379 | } | |
1380 | ptr = strstr(name, "iqn."); | |
1381 | if (ptr) { | |
1382 | tport->tport_proto_id = SCSI_PROTOCOL_ISCSI; | |
1383 | goto check_len; | |
1384 | } | |
1385 | ||
1386 | pr_err("Unable to locate prefix for emulated Target Port:" | |
1387 | " %s\n", name); | |
1388 | kfree(tport); | |
1389 | return ERR_PTR(-EINVAL); | |
1390 | ||
1391 | check_len: | |
1392 | if (strlen(name) >= TCM_VHOST_NAMELEN) { | |
1393 | pr_err("Emulated %s Address: %s, exceeds" | |
1394 | " max: %d\n", name, tcm_vhost_dump_proto_id(tport), | |
1395 | TCM_VHOST_NAMELEN); | |
1396 | kfree(tport); | |
1397 | return ERR_PTR(-EINVAL); | |
1398 | } | |
1399 | snprintf(&tport->tport_name[0], TCM_VHOST_NAMELEN, "%s", &name[off]); | |
1400 | ||
1401 | pr_debug("TCM_VHost_ConfigFS: Allocated emulated Target" | |
1402 | " %s Address: %s\n", tcm_vhost_dump_proto_id(tport), name); | |
1403 | ||
1404 | return &tport->tport_wwn; | |
1405 | } | |
1406 | ||
1407 | static void tcm_vhost_drop_tport(struct se_wwn *wwn) | |
1408 | { | |
1409 | struct tcm_vhost_tport *tport = container_of(wwn, | |
1410 | struct tcm_vhost_tport, tport_wwn); | |
1411 | ||
1412 | pr_debug("TCM_VHost_ConfigFS: Deallocating emulated Target" | |
1413 | " %s Address: %s\n", tcm_vhost_dump_proto_id(tport), | |
1414 | tport->tport_name); | |
1415 | ||
1416 | kfree(tport); | |
1417 | } | |
1418 | ||
1419 | static ssize_t tcm_vhost_wwn_show_attr_version( | |
1420 | struct target_fabric_configfs *tf, | |
1421 | char *page) | |
1422 | { | |
1423 | return sprintf(page, "TCM_VHOST fabric module %s on %s/%s" | |
1424 | "on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname, | |
1425 | utsname()->machine); | |
1426 | } | |
1427 | ||
1428 | TF_WWN_ATTR_RO(tcm_vhost, version); | |
1429 | ||
1430 | static struct configfs_attribute *tcm_vhost_wwn_attrs[] = { | |
1431 | &tcm_vhost_wwn_version.attr, | |
1432 | NULL, | |
1433 | }; | |
1434 | ||
1435 | static struct target_core_fabric_ops tcm_vhost_ops = { | |
1436 | .get_fabric_name = tcm_vhost_get_fabric_name, | |
1437 | .get_fabric_proto_ident = tcm_vhost_get_fabric_proto_ident, | |
1438 | .tpg_get_wwn = tcm_vhost_get_fabric_wwn, | |
1439 | .tpg_get_tag = tcm_vhost_get_tag, | |
1440 | .tpg_get_default_depth = tcm_vhost_get_default_depth, | |
1441 | .tpg_get_pr_transport_id = tcm_vhost_get_pr_transport_id, | |
1442 | .tpg_get_pr_transport_id_len = tcm_vhost_get_pr_transport_id_len, | |
1443 | .tpg_parse_pr_out_transport_id = tcm_vhost_parse_pr_out_transport_id, | |
1444 | .tpg_check_demo_mode = tcm_vhost_check_true, | |
1445 | .tpg_check_demo_mode_cache = tcm_vhost_check_true, | |
1446 | .tpg_check_demo_mode_write_protect = tcm_vhost_check_false, | |
1447 | .tpg_check_prod_mode_write_protect = tcm_vhost_check_false, | |
1448 | .tpg_alloc_fabric_acl = tcm_vhost_alloc_fabric_acl, | |
1449 | .tpg_release_fabric_acl = tcm_vhost_release_fabric_acl, | |
1450 | .tpg_get_inst_index = tcm_vhost_tpg_get_inst_index, | |
1451 | .release_cmd = tcm_vhost_release_cmd, | |
1452 | .shutdown_session = tcm_vhost_shutdown_session, | |
1453 | .close_session = tcm_vhost_close_session, | |
1454 | .sess_get_index = tcm_vhost_sess_get_index, | |
1455 | .sess_get_initiator_sid = NULL, | |
1456 | .write_pending = tcm_vhost_write_pending, | |
1457 | .write_pending_status = tcm_vhost_write_pending_status, | |
1458 | .set_default_node_attributes = tcm_vhost_set_default_node_attrs, | |
1459 | .get_task_tag = tcm_vhost_get_task_tag, | |
1460 | .get_cmd_state = tcm_vhost_get_cmd_state, | |
1461 | .queue_data_in = tcm_vhost_queue_data_in, | |
1462 | .queue_status = tcm_vhost_queue_status, | |
1463 | .queue_tm_rsp = tcm_vhost_queue_tm_rsp, | |
057cbf49 NB |
1464 | /* |
1465 | * Setup callers for generic logic in target_core_fabric_configfs.c | |
1466 | */ | |
1467 | .fabric_make_wwn = tcm_vhost_make_tport, | |
1468 | .fabric_drop_wwn = tcm_vhost_drop_tport, | |
1469 | .fabric_make_tpg = tcm_vhost_make_tpg, | |
1470 | .fabric_drop_tpg = tcm_vhost_drop_tpg, | |
1471 | .fabric_post_link = tcm_vhost_port_link, | |
1472 | .fabric_pre_unlink = tcm_vhost_port_unlink, | |
1473 | .fabric_make_np = NULL, | |
1474 | .fabric_drop_np = NULL, | |
1475 | .fabric_make_nodeacl = tcm_vhost_make_nodeacl, | |
1476 | .fabric_drop_nodeacl = tcm_vhost_drop_nodeacl, | |
1477 | }; | |
1478 | ||
1479 | static int tcm_vhost_register_configfs(void) | |
1480 | { | |
1481 | struct target_fabric_configfs *fabric; | |
1482 | int ret; | |
1483 | ||
1484 | pr_debug("TCM_VHOST fabric module %s on %s/%s" | |
1485 | " on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname, | |
1486 | utsname()->machine); | |
1487 | /* | |
1488 | * Register the top level struct config_item_type with TCM core | |
1489 | */ | |
1490 | fabric = target_fabric_configfs_init(THIS_MODULE, "vhost"); | |
1491 | if (IS_ERR(fabric)) { | |
1492 | pr_err("target_fabric_configfs_init() failed\n"); | |
1493 | return PTR_ERR(fabric); | |
1494 | } | |
1495 | /* | |
1496 | * Setup fabric->tf_ops from our local tcm_vhost_ops | |
1497 | */ | |
1498 | fabric->tf_ops = tcm_vhost_ops; | |
1499 | /* | |
1500 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
1501 | */ | |
1502 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_vhost_wwn_attrs; | |
1503 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_vhost_tpg_attrs; | |
1504 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; | |
1505 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
1506 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
1507 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL; | |
1508 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
1509 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
1510 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
1511 | /* | |
1512 | * Register the fabric for use within TCM | |
1513 | */ | |
1514 | ret = target_fabric_configfs_register(fabric); | |
1515 | if (ret < 0) { | |
1516 | pr_err("target_fabric_configfs_register() failed" | |
1517 | " for TCM_VHOST\n"); | |
1518 | return ret; | |
1519 | } | |
1520 | /* | |
1521 | * Setup our local pointer to *fabric | |
1522 | */ | |
1523 | tcm_vhost_fabric_configfs = fabric; | |
1524 | pr_debug("TCM_VHOST[0] - Set fabric -> tcm_vhost_fabric_configfs\n"); | |
1525 | return 0; | |
1526 | }; | |
1527 | ||
1528 | static void tcm_vhost_deregister_configfs(void) | |
1529 | { | |
1530 | if (!tcm_vhost_fabric_configfs) | |
1531 | return; | |
1532 | ||
1533 | target_fabric_configfs_deregister(tcm_vhost_fabric_configfs); | |
1534 | tcm_vhost_fabric_configfs = NULL; | |
1535 | pr_debug("TCM_VHOST[0] - Cleared tcm_vhost_fabric_configfs\n"); | |
1536 | }; | |
1537 | ||
1538 | static int __init tcm_vhost_init(void) | |
1539 | { | |
1540 | int ret = -ENOMEM; | |
101998f6 NB |
1541 | /* |
1542 | * Use our own dedicated workqueue for submitting I/O into | |
1543 | * target core to avoid contention within system_wq. | |
1544 | */ | |
057cbf49 NB |
1545 | tcm_vhost_workqueue = alloc_workqueue("tcm_vhost", 0, 0); |
1546 | if (!tcm_vhost_workqueue) | |
1547 | goto out; | |
1548 | ||
1549 | ret = vhost_scsi_register(); | |
1550 | if (ret < 0) | |
1551 | goto out_destroy_workqueue; | |
1552 | ||
1553 | ret = tcm_vhost_register_configfs(); | |
1554 | if (ret < 0) | |
1555 | goto out_vhost_scsi_deregister; | |
1556 | ||
1557 | return 0; | |
1558 | ||
1559 | out_vhost_scsi_deregister: | |
1560 | vhost_scsi_deregister(); | |
1561 | out_destroy_workqueue: | |
1562 | destroy_workqueue(tcm_vhost_workqueue); | |
1563 | out: | |
1564 | return ret; | |
1565 | }; | |
1566 | ||
1567 | static void tcm_vhost_exit(void) | |
1568 | { | |
1569 | tcm_vhost_deregister_configfs(); | |
1570 | vhost_scsi_deregister(); | |
1571 | destroy_workqueue(tcm_vhost_workqueue); | |
1572 | }; | |
1573 | ||
1574 | MODULE_DESCRIPTION("TCM_VHOST series fabric driver"); | |
1575 | MODULE_LICENSE("GPL"); | |
1576 | module_init(tcm_vhost_init); | |
1577 | module_exit(tcm_vhost_exit); |