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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> |
1b7f390e | 51 | #include <linux/bitmap.h> |
057cbf49 NB |
52 | |
53 | #include "vhost.c" | |
54 | #include "vhost.h" | |
55 | #include "tcm_vhost.h" | |
56 | ||
101998f6 NB |
57 | enum { |
58 | VHOST_SCSI_VQ_CTL = 0, | |
59 | VHOST_SCSI_VQ_EVT = 1, | |
60 | VHOST_SCSI_VQ_IO = 2, | |
61 | }; | |
62 | ||
1b7f390e AH |
63 | #define VHOST_SCSI_MAX_TARGET 256 |
64 | #define VHOST_SCSI_MAX_VQ 128 | |
67e18cf9 | 65 | |
057cbf49 | 66 | struct vhost_scsi { |
67e18cf9 AH |
67 | /* Protected by vhost_scsi->dev.mutex */ |
68 | struct tcm_vhost_tpg *vs_tpg[VHOST_SCSI_MAX_TARGET]; | |
69 | char vs_vhost_wwpn[TRANSPORT_IQN_LEN]; | |
70 | bool vs_endpoint; | |
71 | ||
057cbf49 | 72 | struct vhost_dev dev; |
1b7f390e | 73 | struct vhost_virtqueue vqs[VHOST_SCSI_MAX_VQ]; |
057cbf49 NB |
74 | |
75 | struct vhost_work vs_completion_work; /* cmd completion work item */ | |
9d6064a3 | 76 | struct llist_head vs_completion_list; /* cmd completion queue */ |
057cbf49 NB |
77 | }; |
78 | ||
79 | /* Local pointer to allocated TCM configfs fabric module */ | |
80 | static struct target_fabric_configfs *tcm_vhost_fabric_configfs; | |
81 | ||
82 | static struct workqueue_struct *tcm_vhost_workqueue; | |
83 | ||
84 | /* Global spinlock to protect tcm_vhost TPG list for vhost IOCTL access */ | |
85 | static DEFINE_MUTEX(tcm_vhost_mutex); | |
86 | static LIST_HEAD(tcm_vhost_list); | |
87 | ||
765b34fd AH |
88 | static int iov_num_pages(struct iovec *iov) |
89 | { | |
90 | return (PAGE_ALIGN((unsigned long)iov->iov_base + iov->iov_len) - | |
91 | ((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT; | |
92 | } | |
93 | ||
057cbf49 NB |
94 | static int tcm_vhost_check_true(struct se_portal_group *se_tpg) |
95 | { | |
96 | return 1; | |
97 | } | |
98 | ||
99 | static int tcm_vhost_check_false(struct se_portal_group *se_tpg) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | static char *tcm_vhost_get_fabric_name(void) | |
105 | { | |
106 | return "vhost"; | |
107 | } | |
108 | ||
109 | static u8 tcm_vhost_get_fabric_proto_ident(struct se_portal_group *se_tpg) | |
110 | { | |
111 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
112 | struct tcm_vhost_tpg, se_tpg); | |
113 | struct tcm_vhost_tport *tport = tpg->tport; | |
114 | ||
115 | switch (tport->tport_proto_id) { | |
116 | case SCSI_PROTOCOL_SAS: | |
117 | return sas_get_fabric_proto_ident(se_tpg); | |
118 | case SCSI_PROTOCOL_FCP: | |
119 | return fc_get_fabric_proto_ident(se_tpg); | |
120 | case SCSI_PROTOCOL_ISCSI: | |
121 | return iscsi_get_fabric_proto_ident(se_tpg); | |
122 | default: | |
123 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
124 | " SAS emulation\n", tport->tport_proto_id); | |
125 | break; | |
126 | } | |
127 | ||
128 | return sas_get_fabric_proto_ident(se_tpg); | |
129 | } | |
130 | ||
131 | static char *tcm_vhost_get_fabric_wwn(struct se_portal_group *se_tpg) | |
132 | { | |
133 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
134 | struct tcm_vhost_tpg, se_tpg); | |
135 | struct tcm_vhost_tport *tport = tpg->tport; | |
136 | ||
137 | return &tport->tport_name[0]; | |
138 | } | |
139 | ||
140 | static u16 tcm_vhost_get_tag(struct se_portal_group *se_tpg) | |
141 | { | |
142 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
143 | struct tcm_vhost_tpg, se_tpg); | |
144 | return tpg->tport_tpgt; | |
145 | } | |
146 | ||
147 | static u32 tcm_vhost_get_default_depth(struct se_portal_group *se_tpg) | |
148 | { | |
149 | return 1; | |
150 | } | |
151 | ||
101998f6 | 152 | static u32 tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg, |
057cbf49 NB |
153 | struct se_node_acl *se_nacl, |
154 | struct t10_pr_registration *pr_reg, | |
155 | int *format_code, | |
156 | unsigned char *buf) | |
157 | { | |
158 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
159 | struct tcm_vhost_tpg, se_tpg); | |
160 | struct tcm_vhost_tport *tport = tpg->tport; | |
161 | ||
162 | switch (tport->tport_proto_id) { | |
163 | case SCSI_PROTOCOL_SAS: | |
164 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
165 | format_code, buf); | |
166 | case SCSI_PROTOCOL_FCP: | |
167 | return fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
168 | format_code, buf); | |
169 | case SCSI_PROTOCOL_ISCSI: | |
170 | return iscsi_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
171 | format_code, buf); | |
172 | default: | |
173 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
174 | " SAS emulation\n", tport->tport_proto_id); | |
175 | break; | |
176 | } | |
177 | ||
178 | return sas_get_pr_transport_id(se_tpg, se_nacl, pr_reg, | |
179 | format_code, buf); | |
180 | } | |
181 | ||
101998f6 | 182 | static u32 tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg, |
057cbf49 NB |
183 | struct se_node_acl *se_nacl, |
184 | struct t10_pr_registration *pr_reg, | |
185 | int *format_code) | |
186 | { | |
187 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
188 | struct tcm_vhost_tpg, se_tpg); | |
189 | struct tcm_vhost_tport *tport = tpg->tport; | |
190 | ||
191 | switch (tport->tport_proto_id) { | |
192 | case SCSI_PROTOCOL_SAS: | |
193 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
194 | format_code); | |
195 | case SCSI_PROTOCOL_FCP: | |
196 | return fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
197 | format_code); | |
198 | case SCSI_PROTOCOL_ISCSI: | |
199 | return iscsi_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
200 | format_code); | |
201 | default: | |
202 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
203 | " SAS emulation\n", tport->tport_proto_id); | |
204 | break; | |
205 | } | |
206 | ||
207 | return sas_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg, | |
208 | format_code); | |
209 | } | |
210 | ||
101998f6 | 211 | static char *tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg, |
057cbf49 NB |
212 | const char *buf, |
213 | u32 *out_tid_len, | |
214 | char **port_nexus_ptr) | |
215 | { | |
216 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
217 | struct tcm_vhost_tpg, se_tpg); | |
218 | struct tcm_vhost_tport *tport = tpg->tport; | |
219 | ||
220 | switch (tport->tport_proto_id) { | |
221 | case SCSI_PROTOCOL_SAS: | |
222 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
223 | port_nexus_ptr); | |
224 | case SCSI_PROTOCOL_FCP: | |
225 | return fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
226 | port_nexus_ptr); | |
227 | case SCSI_PROTOCOL_ISCSI: | |
228 | return iscsi_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
229 | port_nexus_ptr); | |
230 | default: | |
231 | pr_err("Unknown tport_proto_id: 0x%02x, using" | |
232 | " SAS emulation\n", tport->tport_proto_id); | |
233 | break; | |
234 | } | |
235 | ||
236 | return sas_parse_pr_out_transport_id(se_tpg, buf, out_tid_len, | |
237 | port_nexus_ptr); | |
238 | } | |
239 | ||
240 | static struct se_node_acl *tcm_vhost_alloc_fabric_acl( | |
241 | struct se_portal_group *se_tpg) | |
242 | { | |
243 | struct tcm_vhost_nacl *nacl; | |
244 | ||
245 | nacl = kzalloc(sizeof(struct tcm_vhost_nacl), GFP_KERNEL); | |
246 | if (!nacl) { | |
744627e9 | 247 | pr_err("Unable to allocate struct tcm_vhost_nacl\n"); |
057cbf49 NB |
248 | return NULL; |
249 | } | |
250 | ||
251 | return &nacl->se_node_acl; | |
252 | } | |
253 | ||
101998f6 | 254 | static void tcm_vhost_release_fabric_acl(struct se_portal_group *se_tpg, |
057cbf49 NB |
255 | struct se_node_acl *se_nacl) |
256 | { | |
257 | struct tcm_vhost_nacl *nacl = container_of(se_nacl, | |
258 | struct tcm_vhost_nacl, se_node_acl); | |
259 | kfree(nacl); | |
260 | } | |
261 | ||
262 | static u32 tcm_vhost_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
263 | { | |
264 | return 1; | |
265 | } | |
266 | ||
267 | static void tcm_vhost_release_cmd(struct se_cmd *se_cmd) | |
268 | { | |
269 | return; | |
270 | } | |
271 | ||
272 | static int tcm_vhost_shutdown_session(struct se_session *se_sess) | |
273 | { | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static void tcm_vhost_close_session(struct se_session *se_sess) | |
278 | { | |
279 | return; | |
280 | } | |
281 | ||
282 | static u32 tcm_vhost_sess_get_index(struct se_session *se_sess) | |
283 | { | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int tcm_vhost_write_pending(struct se_cmd *se_cmd) | |
288 | { | |
289 | /* Go ahead and process the write immediately */ | |
290 | target_execute_cmd(se_cmd); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static int tcm_vhost_write_pending_status(struct se_cmd *se_cmd) | |
295 | { | |
296 | return 0; | |
297 | } | |
298 | ||
299 | static void tcm_vhost_set_default_node_attrs(struct se_node_acl *nacl) | |
300 | { | |
301 | return; | |
302 | } | |
303 | ||
304 | static u32 tcm_vhost_get_task_tag(struct se_cmd *se_cmd) | |
305 | { | |
306 | return 0; | |
307 | } | |
308 | ||
309 | static int tcm_vhost_get_cmd_state(struct se_cmd *se_cmd) | |
310 | { | |
311 | return 0; | |
312 | } | |
313 | ||
101998f6 NB |
314 | static void vhost_scsi_complete_cmd(struct tcm_vhost_cmd *tv_cmd) |
315 | { | |
316 | struct vhost_scsi *vs = tv_cmd->tvc_vhost; | |
317 | ||
9d6064a3 | 318 | llist_add(&tv_cmd->tvc_completion_list, &vs->vs_completion_list); |
101998f6 NB |
319 | |
320 | vhost_work_queue(&vs->dev, &vs->vs_completion_work); | |
321 | } | |
057cbf49 NB |
322 | |
323 | static int tcm_vhost_queue_data_in(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_status(struct se_cmd *se_cmd) | |
332 | { | |
333 | struct tcm_vhost_cmd *tv_cmd = container_of(se_cmd, | |
334 | struct tcm_vhost_cmd, tvc_se_cmd); | |
335 | vhost_scsi_complete_cmd(tv_cmd); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | static int tcm_vhost_queue_tm_rsp(struct se_cmd *se_cmd) | |
340 | { | |
341 | return 0; | |
342 | } | |
343 | ||
057cbf49 NB |
344 | static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *tv_cmd) |
345 | { | |
346 | struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd; | |
347 | ||
348 | /* TODO locking against target/backend threads? */ | |
349 | transport_generic_free_cmd(se_cmd, 1); | |
350 | ||
351 | if (tv_cmd->tvc_sgl_count) { | |
352 | u32 i; | |
353 | for (i = 0; i < tv_cmd->tvc_sgl_count; i++) | |
354 | put_page(sg_page(&tv_cmd->tvc_sgl[i])); | |
355 | ||
356 | kfree(tv_cmd->tvc_sgl); | |
357 | } | |
358 | ||
359 | kfree(tv_cmd); | |
360 | } | |
361 | ||
057cbf49 NB |
362 | /* Fill in status and signal that we are done processing this command |
363 | * | |
364 | * This is scheduled in the vhost work queue so we are called with the owner | |
365 | * process mm and can access the vring. | |
366 | */ | |
367 | static void vhost_scsi_complete_cmd_work(struct vhost_work *work) | |
368 | { | |
369 | struct vhost_scsi *vs = container_of(work, struct vhost_scsi, | |
370 | vs_completion_work); | |
1b7f390e | 371 | DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ); |
9d6064a3 | 372 | struct virtio_scsi_cmd_resp v_rsp; |
057cbf49 | 373 | struct tcm_vhost_cmd *tv_cmd; |
9d6064a3 AH |
374 | struct llist_node *llnode; |
375 | struct se_cmd *se_cmd; | |
1b7f390e | 376 | int ret, vq; |
057cbf49 | 377 | |
1b7f390e | 378 | bitmap_zero(signal, VHOST_SCSI_MAX_VQ); |
9d6064a3 AH |
379 | llnode = llist_del_all(&vs->vs_completion_list); |
380 | while (llnode) { | |
381 | tv_cmd = llist_entry(llnode, struct tcm_vhost_cmd, | |
382 | tvc_completion_list); | |
383 | llnode = llist_next(llnode); | |
384 | se_cmd = &tv_cmd->tvc_se_cmd; | |
057cbf49 NB |
385 | |
386 | pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__, | |
387 | tv_cmd, se_cmd->residual_count, se_cmd->scsi_status); | |
388 | ||
389 | memset(&v_rsp, 0, sizeof(v_rsp)); | |
390 | v_rsp.resid = se_cmd->residual_count; | |
391 | /* TODO is status_qualifier field needed? */ | |
392 | v_rsp.status = se_cmd->scsi_status; | |
393 | v_rsp.sense_len = se_cmd->scsi_sense_length; | |
394 | memcpy(v_rsp.sense, tv_cmd->tvc_sense_buf, | |
395 | v_rsp.sense_len); | |
396 | ret = copy_to_user(tv_cmd->tvc_resp, &v_rsp, sizeof(v_rsp)); | |
1b7f390e AH |
397 | if (likely(ret == 0)) { |
398 | vhost_add_used(tv_cmd->tvc_vq, tv_cmd->tvc_vq_desc, 0); | |
399 | vq = tv_cmd->tvc_vq - vs->vqs; | |
400 | __set_bit(vq, signal); | |
401 | } else | |
057cbf49 NB |
402 | pr_err("Faulted on virtio_scsi_cmd_resp\n"); |
403 | ||
404 | vhost_scsi_free_cmd(tv_cmd); | |
405 | } | |
406 | ||
1b7f390e AH |
407 | vq = -1; |
408 | while ((vq = find_next_bit(signal, VHOST_SCSI_MAX_VQ, vq + 1)) | |
409 | < VHOST_SCSI_MAX_VQ) | |
410 | vhost_signal(&vs->dev, &vs->vqs[vq]); | |
057cbf49 NB |
411 | } |
412 | ||
057cbf49 NB |
413 | static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd( |
414 | struct tcm_vhost_tpg *tv_tpg, | |
415 | struct virtio_scsi_cmd_req *v_req, | |
416 | u32 exp_data_len, | |
417 | int data_direction) | |
418 | { | |
419 | struct tcm_vhost_cmd *tv_cmd; | |
420 | struct tcm_vhost_nexus *tv_nexus; | |
057cbf49 NB |
421 | |
422 | tv_nexus = tv_tpg->tpg_nexus; | |
423 | if (!tv_nexus) { | |
424 | pr_err("Unable to locate active struct tcm_vhost_nexus\n"); | |
425 | return ERR_PTR(-EIO); | |
426 | } | |
057cbf49 NB |
427 | |
428 | tv_cmd = kzalloc(sizeof(struct tcm_vhost_cmd), GFP_ATOMIC); | |
429 | if (!tv_cmd) { | |
430 | pr_err("Unable to allocate struct tcm_vhost_cmd\n"); | |
431 | return ERR_PTR(-ENOMEM); | |
432 | } | |
057cbf49 | 433 | tv_cmd->tvc_tag = v_req->tag; |
9f0abc15 NB |
434 | tv_cmd->tvc_task_attr = v_req->task_attr; |
435 | tv_cmd->tvc_exp_data_len = exp_data_len; | |
436 | tv_cmd->tvc_data_direction = data_direction; | |
437 | tv_cmd->tvc_nexus = tv_nexus; | |
057cbf49 | 438 | |
057cbf49 NB |
439 | return tv_cmd; |
440 | } | |
441 | ||
442 | /* | |
443 | * Map a user memory range into a scatterlist | |
444 | * | |
445 | * Returns the number of scatterlist entries used or -errno on error. | |
446 | */ | |
447 | static int vhost_scsi_map_to_sgl(struct scatterlist *sgl, | |
1810053e | 448 | unsigned int sgl_count, struct iovec *iov, int write) |
057cbf49 | 449 | { |
1810053e | 450 | unsigned int npages = 0, pages_nr, offset, nbytes; |
057cbf49 | 451 | struct scatterlist *sg = sgl; |
1810053e AH |
452 | void __user *ptr = iov->iov_base; |
453 | size_t len = iov->iov_len; | |
454 | struct page **pages; | |
455 | int ret, i; | |
057cbf49 | 456 | |
1810053e AH |
457 | pages_nr = iov_num_pages(iov); |
458 | if (pages_nr > sgl_count) | |
459 | return -ENOBUFS; | |
057cbf49 | 460 | |
1810053e AH |
461 | pages = kmalloc(pages_nr * sizeof(struct page *), GFP_KERNEL); |
462 | if (!pages) | |
463 | return -ENOMEM; | |
057cbf49 | 464 | |
1810053e AH |
465 | ret = get_user_pages_fast((unsigned long)ptr, pages_nr, write, pages); |
466 | /* No pages were pinned */ | |
467 | if (ret < 0) | |
468 | goto out; | |
469 | /* Less pages pinned than wanted */ | |
470 | if (ret != pages_nr) { | |
471 | for (i = 0; i < ret; i++) | |
472 | put_page(pages[i]); | |
473 | ret = -EFAULT; | |
474 | goto out; | |
475 | } | |
476 | ||
477 | while (len > 0) { | |
478 | offset = (uintptr_t)ptr & ~PAGE_MASK; | |
479 | nbytes = min_t(unsigned int, PAGE_SIZE - offset, len); | |
480 | sg_set_page(sg, pages[npages], nbytes, offset); | |
057cbf49 NB |
481 | ptr += nbytes; |
482 | len -= nbytes; | |
483 | sg++; | |
484 | npages++; | |
485 | } | |
057cbf49 | 486 | |
1810053e AH |
487 | out: |
488 | kfree(pages); | |
057cbf49 NB |
489 | return ret; |
490 | } | |
491 | ||
492 | static int vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *tv_cmd, | |
493 | struct iovec *iov, unsigned int niov, int write) | |
494 | { | |
495 | int ret; | |
496 | unsigned int i; | |
497 | u32 sgl_count; | |
498 | struct scatterlist *sg; | |
499 | ||
500 | /* | |
501 | * Find out how long sglist needs to be | |
502 | */ | |
503 | sgl_count = 0; | |
f3158f36 AH |
504 | for (i = 0; i < niov; i++) |
505 | sgl_count += iov_num_pages(&iov[i]); | |
506 | ||
057cbf49 NB |
507 | /* TODO overflow checking */ |
508 | ||
509 | sg = kmalloc(sizeof(tv_cmd->tvc_sgl[0]) * sgl_count, GFP_ATOMIC); | |
510 | if (!sg) | |
511 | return -ENOMEM; | |
f0e0e9bb FW |
512 | pr_debug("%s sg %p sgl_count %u is_err %d\n", __func__, |
513 | sg, sgl_count, !sg); | |
057cbf49 NB |
514 | sg_init_table(sg, sgl_count); |
515 | ||
516 | tv_cmd->tvc_sgl = sg; | |
517 | tv_cmd->tvc_sgl_count = sgl_count; | |
518 | ||
519 | pr_debug("Mapping %u iovecs for %u pages\n", niov, sgl_count); | |
520 | for (i = 0; i < niov; i++) { | |
1810053e | 521 | ret = vhost_scsi_map_to_sgl(sg, sgl_count, &iov[i], write); |
057cbf49 NB |
522 | if (ret < 0) { |
523 | for (i = 0; i < tv_cmd->tvc_sgl_count; i++) | |
524 | put_page(sg_page(&tv_cmd->tvc_sgl[i])); | |
525 | kfree(tv_cmd->tvc_sgl); | |
526 | tv_cmd->tvc_sgl = NULL; | |
527 | tv_cmd->tvc_sgl_count = 0; | |
528 | return ret; | |
529 | } | |
530 | ||
531 | sg += ret; | |
532 | sgl_count -= ret; | |
533 | } | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static void tcm_vhost_submission_work(struct work_struct *work) | |
538 | { | |
539 | struct tcm_vhost_cmd *tv_cmd = | |
540 | container_of(work, struct tcm_vhost_cmd, work); | |
9f0abc15 | 541 | struct tcm_vhost_nexus *tv_nexus; |
057cbf49 NB |
542 | struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd; |
543 | struct scatterlist *sg_ptr, *sg_bidi_ptr = NULL; | |
544 | int rc, sg_no_bidi = 0; | |
057cbf49 NB |
545 | |
546 | if (tv_cmd->tvc_sgl_count) { | |
547 | sg_ptr = tv_cmd->tvc_sgl; | |
057cbf49 NB |
548 | /* FIXME: Fix BIDI operation in tcm_vhost_submission_work() */ |
549 | #if 0 | |
550 | if (se_cmd->se_cmd_flags & SCF_BIDI) { | |
551 | sg_bidi_ptr = NULL; | |
552 | sg_no_bidi = 0; | |
553 | } | |
554 | #endif | |
555 | } else { | |
556 | sg_ptr = NULL; | |
557 | } | |
9f0abc15 NB |
558 | tv_nexus = tv_cmd->tvc_nexus; |
559 | ||
560 | rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess, | |
561 | tv_cmd->tvc_cdb, &tv_cmd->tvc_sense_buf[0], | |
562 | tv_cmd->tvc_lun, tv_cmd->tvc_exp_data_len, | |
563 | tv_cmd->tvc_task_attr, tv_cmd->tvc_data_direction, | |
564 | 0, sg_ptr, tv_cmd->tvc_sgl_count, | |
565 | sg_bidi_ptr, sg_no_bidi); | |
057cbf49 NB |
566 | if (rc < 0) { |
567 | transport_send_check_condition_and_sense(se_cmd, | |
9f0abc15 | 568 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); |
057cbf49 | 569 | transport_generic_free_cmd(se_cmd, 0); |
057cbf49 | 570 | } |
057cbf49 NB |
571 | } |
572 | ||
1b7f390e AH |
573 | static void vhost_scsi_handle_vq(struct vhost_scsi *vs, |
574 | struct vhost_virtqueue *vq) | |
057cbf49 | 575 | { |
057cbf49 NB |
576 | struct virtio_scsi_cmd_req v_req; |
577 | struct tcm_vhost_tpg *tv_tpg; | |
578 | struct tcm_vhost_cmd *tv_cmd; | |
579 | u32 exp_data_len, data_first, data_num, data_direction; | |
580 | unsigned out, in, i; | |
581 | int head, ret; | |
67e18cf9 | 582 | u8 target; |
057cbf49 NB |
583 | |
584 | /* Must use ioctl VHOST_SCSI_SET_ENDPOINT */ | |
67e18cf9 | 585 | if (unlikely(!vs->vs_endpoint)) |
057cbf49 | 586 | return; |
057cbf49 NB |
587 | |
588 | mutex_lock(&vq->mutex); | |
589 | vhost_disable_notify(&vs->dev, vq); | |
590 | ||
591 | for (;;) { | |
592 | head = vhost_get_vq_desc(&vs->dev, vq, vq->iov, | |
593 | ARRAY_SIZE(vq->iov), &out, &in, | |
594 | NULL, NULL); | |
595 | pr_debug("vhost_get_vq_desc: head: %d, out: %u in: %u\n", | |
596 | head, out, in); | |
597 | /* On error, stop handling until the next kick. */ | |
598 | if (unlikely(head < 0)) | |
599 | break; | |
600 | /* Nothing new? Wait for eventfd to tell us they refilled. */ | |
601 | if (head == vq->num) { | |
602 | if (unlikely(vhost_enable_notify(&vs->dev, vq))) { | |
603 | vhost_disable_notify(&vs->dev, vq); | |
604 | continue; | |
605 | } | |
606 | break; | |
607 | } | |
608 | ||
609 | /* FIXME: BIDI operation */ | |
610 | if (out == 1 && in == 1) { | |
611 | data_direction = DMA_NONE; | |
612 | data_first = 0; | |
613 | data_num = 0; | |
614 | } else if (out == 1 && in > 1) { | |
615 | data_direction = DMA_FROM_DEVICE; | |
616 | data_first = out + 1; | |
617 | data_num = in - 1; | |
618 | } else if (out > 1 && in == 1) { | |
619 | data_direction = DMA_TO_DEVICE; | |
620 | data_first = 1; | |
621 | data_num = out - 1; | |
622 | } else { | |
623 | vq_err(vq, "Invalid buffer layout out: %u in: %u\n", | |
624 | out, in); | |
625 | break; | |
626 | } | |
627 | ||
628 | /* | |
629 | * Check for a sane resp buffer so we can report errors to | |
630 | * the guest. | |
631 | */ | |
632 | if (unlikely(vq->iov[out].iov_len != | |
633 | sizeof(struct virtio_scsi_cmd_resp))) { | |
634 | vq_err(vq, "Expecting virtio_scsi_cmd_resp, got %zu" | |
635 | " bytes\n", vq->iov[out].iov_len); | |
636 | break; | |
637 | } | |
638 | ||
639 | if (unlikely(vq->iov[0].iov_len != sizeof(v_req))) { | |
640 | vq_err(vq, "Expecting virtio_scsi_cmd_req, got %zu" | |
641 | " bytes\n", vq->iov[0].iov_len); | |
642 | break; | |
643 | } | |
644 | pr_debug("Calling __copy_from_user: vq->iov[0].iov_base: %p," | |
645 | " len: %zu\n", vq->iov[0].iov_base, sizeof(v_req)); | |
646 | ret = __copy_from_user(&v_req, vq->iov[0].iov_base, | |
647 | sizeof(v_req)); | |
648 | if (unlikely(ret)) { | |
649 | vq_err(vq, "Faulted on virtio_scsi_cmd_req\n"); | |
650 | break; | |
651 | } | |
652 | ||
67e18cf9 AH |
653 | /* Extract the tpgt */ |
654 | target = v_req.lun[1]; | |
655 | tv_tpg = vs->vs_tpg[target]; | |
656 | ||
657 | /* Target does not exist, fail the request */ | |
658 | if (unlikely(!tv_tpg)) { | |
659 | struct virtio_scsi_cmd_resp __user *resp; | |
660 | struct virtio_scsi_cmd_resp rsp; | |
661 | ||
662 | memset(&rsp, 0, sizeof(rsp)); | |
663 | rsp.response = VIRTIO_SCSI_S_BAD_TARGET; | |
664 | resp = vq->iov[out].iov_base; | |
665 | ret = __copy_to_user(resp, &rsp, sizeof(rsp)); | |
666 | if (!ret) | |
667 | vhost_add_used_and_signal(&vs->dev, | |
1b7f390e | 668 | vq, head, 0); |
67e18cf9 AH |
669 | else |
670 | pr_err("Faulted on virtio_scsi_cmd_resp\n"); | |
671 | ||
672 | continue; | |
673 | } | |
674 | ||
057cbf49 NB |
675 | exp_data_len = 0; |
676 | for (i = 0; i < data_num; i++) | |
677 | exp_data_len += vq->iov[data_first + i].iov_len; | |
678 | ||
679 | tv_cmd = vhost_scsi_allocate_cmd(tv_tpg, &v_req, | |
680 | exp_data_len, data_direction); | |
681 | if (IS_ERR(tv_cmd)) { | |
682 | vq_err(vq, "vhost_scsi_allocate_cmd failed %ld\n", | |
683 | PTR_ERR(tv_cmd)); | |
684 | break; | |
685 | } | |
686 | pr_debug("Allocated tv_cmd: %p exp_data_len: %d, data_direction" | |
687 | ": %d\n", tv_cmd, exp_data_len, data_direction); | |
688 | ||
689 | tv_cmd->tvc_vhost = vs; | |
1b7f390e | 690 | tv_cmd->tvc_vq = vq; |
057cbf49 NB |
691 | |
692 | if (unlikely(vq->iov[out].iov_len != | |
693 | sizeof(struct virtio_scsi_cmd_resp))) { | |
694 | vq_err(vq, "Expecting virtio_scsi_cmd_resp, got %zu" | |
695 | " bytes, out: %d, in: %d\n", | |
696 | vq->iov[out].iov_len, out, in); | |
697 | break; | |
698 | } | |
699 | ||
700 | tv_cmd->tvc_resp = vq->iov[out].iov_base; | |
701 | ||
702 | /* | |
703 | * Copy in the recieved CDB descriptor into tv_cmd->tvc_cdb | |
704 | * that will be used by tcm_vhost_new_cmd_map() and down into | |
705 | * target_setup_cmd_from_cdb() | |
706 | */ | |
707 | memcpy(tv_cmd->tvc_cdb, v_req.cdb, TCM_VHOST_MAX_CDB_SIZE); | |
708 | /* | |
709 | * Check that the recieved CDB size does not exceeded our | |
710 | * hardcoded max for tcm_vhost | |
711 | */ | |
712 | /* TODO what if cdb was too small for varlen cdb header? */ | |
713 | if (unlikely(scsi_command_size(tv_cmd->tvc_cdb) > | |
714 | TCM_VHOST_MAX_CDB_SIZE)) { | |
715 | vq_err(vq, "Received SCSI CDB with command_size: %d that" | |
716 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", | |
717 | scsi_command_size(tv_cmd->tvc_cdb), | |
718 | TCM_VHOST_MAX_CDB_SIZE); | |
719 | break; /* TODO */ | |
720 | } | |
721 | tv_cmd->tvc_lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF; | |
722 | ||
723 | pr_debug("vhost_scsi got command opcode: %#02x, lun: %d\n", | |
724 | tv_cmd->tvc_cdb[0], tv_cmd->tvc_lun); | |
725 | ||
726 | if (data_direction != DMA_NONE) { | |
727 | ret = vhost_scsi_map_iov_to_sgl(tv_cmd, | |
728 | &vq->iov[data_first], data_num, | |
729 | data_direction == DMA_TO_DEVICE); | |
730 | if (unlikely(ret)) { | |
731 | vq_err(vq, "Failed to map iov to sgl\n"); | |
732 | break; /* TODO */ | |
733 | } | |
734 | } | |
735 | ||
736 | /* | |
737 | * Save the descriptor from vhost_get_vq_desc() to be used to | |
738 | * complete the virtio-scsi request in TCM callback context via | |
739 | * tcm_vhost_queue_data_in() and tcm_vhost_queue_status() | |
740 | */ | |
741 | tv_cmd->tvc_vq_desc = head; | |
742 | /* | |
743 | * Dispatch tv_cmd descriptor for cmwq execution in process | |
744 | * context provided by tcm_vhost_workqueue. This also ensures | |
745 | * tv_cmd is executed on the same kworker CPU as this vhost | |
746 | * thread to gain positive L2 cache locality effects.. | |
747 | */ | |
748 | INIT_WORK(&tv_cmd->work, tcm_vhost_submission_work); | |
749 | queue_work(tcm_vhost_workqueue, &tv_cmd->work); | |
750 | } | |
751 | ||
752 | mutex_unlock(&vq->mutex); | |
753 | } | |
754 | ||
755 | static void vhost_scsi_ctl_handle_kick(struct vhost_work *work) | |
756 | { | |
101998f6 | 757 | pr_debug("%s: The handling func for control queue.\n", __func__); |
057cbf49 NB |
758 | } |
759 | ||
760 | static void vhost_scsi_evt_handle_kick(struct vhost_work *work) | |
761 | { | |
101998f6 | 762 | pr_debug("%s: The handling func for event queue.\n", __func__); |
057cbf49 NB |
763 | } |
764 | ||
765 | static void vhost_scsi_handle_kick(struct vhost_work *work) | |
766 | { | |
767 | struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue, | |
768 | poll.work); | |
769 | struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev); | |
770 | ||
1b7f390e | 771 | vhost_scsi_handle_vq(vs, vq); |
057cbf49 NB |
772 | } |
773 | ||
774 | /* | |
775 | * Called from vhost_scsi_ioctl() context to walk the list of available | |
776 | * tcm_vhost_tpg with an active struct tcm_vhost_nexus | |
777 | */ | |
778 | static int vhost_scsi_set_endpoint( | |
779 | struct vhost_scsi *vs, | |
780 | struct vhost_scsi_target *t) | |
781 | { | |
782 | struct tcm_vhost_tport *tv_tport; | |
783 | struct tcm_vhost_tpg *tv_tpg; | |
67e18cf9 AH |
784 | bool match = false; |
785 | int index, ret; | |
057cbf49 NB |
786 | |
787 | mutex_lock(&vs->dev.mutex); | |
788 | /* Verify that ring has been setup correctly. */ | |
789 | for (index = 0; index < vs->dev.nvqs; ++index) { | |
790 | /* Verify that ring has been setup correctly. */ | |
791 | if (!vhost_vq_access_ok(&vs->vqs[index])) { | |
792 | mutex_unlock(&vs->dev.mutex); | |
793 | return -EFAULT; | |
794 | } | |
795 | } | |
057cbf49 NB |
796 | |
797 | mutex_lock(&tcm_vhost_mutex); | |
798 | list_for_each_entry(tv_tpg, &tcm_vhost_list, tv_tpg_list) { | |
799 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
800 | if (!tv_tpg->tpg_nexus) { | |
801 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
802 | continue; | |
803 | } | |
101998f6 | 804 | if (tv_tpg->tv_tpg_vhost_count != 0) { |
057cbf49 NB |
805 | mutex_unlock(&tv_tpg->tv_tpg_mutex); |
806 | continue; | |
807 | } | |
808 | tv_tport = tv_tpg->tport; | |
809 | ||
67e18cf9 AH |
810 | if (!strcmp(tv_tport->tport_name, t->vhost_wwpn)) { |
811 | if (vs->vs_tpg[tv_tpg->tport_tpgt]) { | |
101998f6 | 812 | mutex_unlock(&tv_tpg->tv_tpg_mutex); |
67e18cf9 AH |
813 | mutex_unlock(&tcm_vhost_mutex); |
814 | mutex_unlock(&vs->dev.mutex); | |
101998f6 NB |
815 | return -EEXIST; |
816 | } | |
67e18cf9 AH |
817 | tv_tpg->tv_tpg_vhost_count++; |
818 | vs->vs_tpg[tv_tpg->tport_tpgt] = tv_tpg; | |
057cbf49 | 819 | smp_mb__after_atomic_inc(); |
67e18cf9 | 820 | match = true; |
057cbf49 NB |
821 | } |
822 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
823 | } | |
824 | mutex_unlock(&tcm_vhost_mutex); | |
67e18cf9 AH |
825 | |
826 | if (match) { | |
827 | memcpy(vs->vs_vhost_wwpn, t->vhost_wwpn, | |
828 | sizeof(vs->vs_vhost_wwpn)); | |
829 | vs->vs_endpoint = true; | |
830 | ret = 0; | |
831 | } else { | |
832 | ret = -EEXIST; | |
833 | } | |
834 | ||
835 | mutex_unlock(&vs->dev.mutex); | |
836 | return ret; | |
057cbf49 NB |
837 | } |
838 | ||
839 | static int vhost_scsi_clear_endpoint( | |
840 | struct vhost_scsi *vs, | |
841 | struct vhost_scsi_target *t) | |
842 | { | |
843 | struct tcm_vhost_tport *tv_tport; | |
844 | struct tcm_vhost_tpg *tv_tpg; | |
67e18cf9 AH |
845 | int index, ret, i; |
846 | u8 target; | |
057cbf49 NB |
847 | |
848 | mutex_lock(&vs->dev.mutex); | |
849 | /* Verify that ring has been setup correctly. */ | |
850 | for (index = 0; index < vs->dev.nvqs; ++index) { | |
851 | if (!vhost_vq_access_ok(&vs->vqs[index])) { | |
101998f6 | 852 | ret = -EFAULT; |
038e0af4 | 853 | goto err_dev; |
057cbf49 NB |
854 | } |
855 | } | |
67e18cf9 AH |
856 | for (i = 0; i < VHOST_SCSI_MAX_TARGET; i++) { |
857 | target = i; | |
057cbf49 | 858 | |
67e18cf9 AH |
859 | tv_tpg = vs->vs_tpg[target]; |
860 | if (!tv_tpg) | |
861 | continue; | |
862 | ||
038e0af4 | 863 | mutex_lock(&tv_tpg->tv_tpg_mutex); |
67e18cf9 AH |
864 | tv_tport = tv_tpg->tport; |
865 | if (!tv_tport) { | |
866 | ret = -ENODEV; | |
038e0af4 | 867 | goto err_tpg; |
67e18cf9 AH |
868 | } |
869 | ||
870 | if (strcmp(tv_tport->tport_name, t->vhost_wwpn)) { | |
871 | pr_warn("tv_tport->tport_name: %s, tv_tpg->tport_tpgt: %hu" | |
872 | " does not match t->vhost_wwpn: %s, t->vhost_tpgt: %hu\n", | |
873 | tv_tport->tport_name, tv_tpg->tport_tpgt, | |
874 | t->vhost_wwpn, t->vhost_tpgt); | |
875 | ret = -EINVAL; | |
038e0af4 | 876 | goto err_tpg; |
67e18cf9 AH |
877 | } |
878 | tv_tpg->tv_tpg_vhost_count--; | |
879 | vs->vs_tpg[target] = NULL; | |
880 | vs->vs_endpoint = false; | |
038e0af4 | 881 | mutex_unlock(&tv_tpg->tv_tpg_mutex); |
057cbf49 | 882 | } |
057cbf49 | 883 | mutex_unlock(&vs->dev.mutex); |
057cbf49 | 884 | return 0; |
101998f6 | 885 | |
038e0af4 AH |
886 | err_tpg: |
887 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
888 | err_dev: | |
101998f6 NB |
889 | mutex_unlock(&vs->dev.mutex); |
890 | return ret; | |
057cbf49 NB |
891 | } |
892 | ||
893 | static int vhost_scsi_open(struct inode *inode, struct file *f) | |
894 | { | |
895 | struct vhost_scsi *s; | |
1b7f390e | 896 | int r, i; |
057cbf49 NB |
897 | |
898 | s = kzalloc(sizeof(*s), GFP_KERNEL); | |
899 | if (!s) | |
900 | return -ENOMEM; | |
901 | ||
902 | vhost_work_init(&s->vs_completion_work, vhost_scsi_complete_cmd_work); | |
057cbf49 | 903 | |
101998f6 NB |
904 | s->vqs[VHOST_SCSI_VQ_CTL].handle_kick = vhost_scsi_ctl_handle_kick; |
905 | s->vqs[VHOST_SCSI_VQ_EVT].handle_kick = vhost_scsi_evt_handle_kick; | |
1b7f390e AH |
906 | for (i = VHOST_SCSI_VQ_IO; i < VHOST_SCSI_MAX_VQ; i++) |
907 | s->vqs[i].handle_kick = vhost_scsi_handle_kick; | |
908 | r = vhost_dev_init(&s->dev, s->vqs, VHOST_SCSI_MAX_VQ); | |
057cbf49 NB |
909 | if (r < 0) { |
910 | kfree(s); | |
911 | return r; | |
912 | } | |
913 | ||
914 | f->private_data = s; | |
915 | return 0; | |
916 | } | |
917 | ||
918 | static int vhost_scsi_release(struct inode *inode, struct file *f) | |
919 | { | |
920 | struct vhost_scsi *s = f->private_data; | |
67e18cf9 | 921 | struct vhost_scsi_target t; |
057cbf49 | 922 | |
67e18cf9 AH |
923 | mutex_lock(&s->dev.mutex); |
924 | memcpy(t.vhost_wwpn, s->vs_vhost_wwpn, sizeof(t.vhost_wwpn)); | |
925 | mutex_unlock(&s->dev.mutex); | |
926 | vhost_scsi_clear_endpoint(s, &t); | |
b211616d | 927 | vhost_dev_stop(&s->dev); |
057cbf49 NB |
928 | vhost_dev_cleanup(&s->dev, false); |
929 | kfree(s); | |
930 | return 0; | |
931 | } | |
932 | ||
101998f6 NB |
933 | static void vhost_scsi_flush_vq(struct vhost_scsi *vs, int index) |
934 | { | |
935 | vhost_poll_flush(&vs->dev.vqs[index].poll); | |
936 | } | |
937 | ||
938 | static void vhost_scsi_flush(struct vhost_scsi *vs) | |
939 | { | |
1b7f390e AH |
940 | int i; |
941 | ||
942 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) | |
943 | vhost_scsi_flush_vq(vs, i); | |
72c77539 | 944 | vhost_work_flush(&vs->dev, &vs->vs_completion_work); |
101998f6 NB |
945 | } |
946 | ||
057cbf49 NB |
947 | static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features) |
948 | { | |
949 | if (features & ~VHOST_FEATURES) | |
950 | return -EOPNOTSUPP; | |
951 | ||
952 | mutex_lock(&vs->dev.mutex); | |
953 | if ((features & (1 << VHOST_F_LOG_ALL)) && | |
954 | !vhost_log_access_ok(&vs->dev)) { | |
955 | mutex_unlock(&vs->dev.mutex); | |
956 | return -EFAULT; | |
957 | } | |
958 | vs->dev.acked_features = features; | |
101998f6 NB |
959 | smp_wmb(); |
960 | vhost_scsi_flush(vs); | |
057cbf49 NB |
961 | mutex_unlock(&vs->dev.mutex); |
962 | return 0; | |
963 | } | |
964 | ||
965 | static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl, | |
966 | unsigned long arg) | |
967 | { | |
968 | struct vhost_scsi *vs = f->private_data; | |
969 | struct vhost_scsi_target backend; | |
970 | void __user *argp = (void __user *)arg; | |
971 | u64 __user *featurep = argp; | |
972 | u64 features; | |
101998f6 | 973 | int r, abi_version = VHOST_SCSI_ABI_VERSION; |
057cbf49 NB |
974 | |
975 | switch (ioctl) { | |
976 | case VHOST_SCSI_SET_ENDPOINT: | |
977 | if (copy_from_user(&backend, argp, sizeof backend)) | |
978 | return -EFAULT; | |
6de7145c MT |
979 | if (backend.reserved != 0) |
980 | return -EOPNOTSUPP; | |
057cbf49 NB |
981 | |
982 | return vhost_scsi_set_endpoint(vs, &backend); | |
983 | case VHOST_SCSI_CLEAR_ENDPOINT: | |
984 | if (copy_from_user(&backend, argp, sizeof backend)) | |
985 | return -EFAULT; | |
6de7145c MT |
986 | if (backend.reserved != 0) |
987 | return -EOPNOTSUPP; | |
057cbf49 NB |
988 | |
989 | return vhost_scsi_clear_endpoint(vs, &backend); | |
990 | case VHOST_SCSI_GET_ABI_VERSION: | |
101998f6 | 991 | if (copy_to_user(argp, &abi_version, sizeof abi_version)) |
057cbf49 NB |
992 | return -EFAULT; |
993 | return 0; | |
994 | case VHOST_GET_FEATURES: | |
995 | features = VHOST_FEATURES; | |
996 | if (copy_to_user(featurep, &features, sizeof features)) | |
997 | return -EFAULT; | |
998 | return 0; | |
999 | case VHOST_SET_FEATURES: | |
1000 | if (copy_from_user(&features, featurep, sizeof features)) | |
1001 | return -EFAULT; | |
1002 | return vhost_scsi_set_features(vs, features); | |
1003 | default: | |
1004 | mutex_lock(&vs->dev.mutex); | |
935cdee7 MT |
1005 | r = vhost_dev_ioctl(&vs->dev, ioctl, argp); |
1006 | /* TODO: flush backend after dev ioctl. */ | |
1007 | if (r == -ENOIOCTLCMD) | |
1008 | r = vhost_vring_ioctl(&vs->dev, ioctl, argp); | |
057cbf49 NB |
1009 | mutex_unlock(&vs->dev.mutex); |
1010 | return r; | |
1011 | } | |
1012 | } | |
1013 | ||
101998f6 NB |
1014 | #ifdef CONFIG_COMPAT |
1015 | static long vhost_scsi_compat_ioctl(struct file *f, unsigned int ioctl, | |
1016 | unsigned long arg) | |
1017 | { | |
1018 | return vhost_scsi_ioctl(f, ioctl, (unsigned long)compat_ptr(arg)); | |
1019 | } | |
1020 | #endif | |
1021 | ||
057cbf49 NB |
1022 | static const struct file_operations vhost_scsi_fops = { |
1023 | .owner = THIS_MODULE, | |
1024 | .release = vhost_scsi_release, | |
1025 | .unlocked_ioctl = vhost_scsi_ioctl, | |
101998f6 NB |
1026 | #ifdef CONFIG_COMPAT |
1027 | .compat_ioctl = vhost_scsi_compat_ioctl, | |
1028 | #endif | |
057cbf49 NB |
1029 | .open = vhost_scsi_open, |
1030 | .llseek = noop_llseek, | |
1031 | }; | |
1032 | ||
1033 | static struct miscdevice vhost_scsi_misc = { | |
1034 | MISC_DYNAMIC_MINOR, | |
1035 | "vhost-scsi", | |
1036 | &vhost_scsi_fops, | |
1037 | }; | |
1038 | ||
1039 | static int __init vhost_scsi_register(void) | |
1040 | { | |
1041 | return misc_register(&vhost_scsi_misc); | |
1042 | } | |
1043 | ||
1044 | static int vhost_scsi_deregister(void) | |
1045 | { | |
1046 | return misc_deregister(&vhost_scsi_misc); | |
1047 | } | |
1048 | ||
1049 | static char *tcm_vhost_dump_proto_id(struct tcm_vhost_tport *tport) | |
1050 | { | |
1051 | switch (tport->tport_proto_id) { | |
1052 | case SCSI_PROTOCOL_SAS: | |
1053 | return "SAS"; | |
1054 | case SCSI_PROTOCOL_FCP: | |
1055 | return "FCP"; | |
1056 | case SCSI_PROTOCOL_ISCSI: | |
1057 | return "iSCSI"; | |
1058 | default: | |
1059 | break; | |
1060 | } | |
1061 | ||
1062 | return "Unknown"; | |
1063 | } | |
1064 | ||
101998f6 | 1065 | static int tcm_vhost_port_link(struct se_portal_group *se_tpg, |
057cbf49 NB |
1066 | struct se_lun *lun) |
1067 | { | |
1068 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1069 | struct tcm_vhost_tpg, se_tpg); | |
1070 | ||
101998f6 NB |
1071 | mutex_lock(&tv_tpg->tv_tpg_mutex); |
1072 | tv_tpg->tv_tpg_port_count++; | |
1073 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
057cbf49 NB |
1074 | |
1075 | return 0; | |
1076 | } | |
1077 | ||
101998f6 | 1078 | static void tcm_vhost_port_unlink(struct se_portal_group *se_tpg, |
057cbf49 NB |
1079 | struct se_lun *se_lun) |
1080 | { | |
1081 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1082 | struct tcm_vhost_tpg, se_tpg); | |
1083 | ||
101998f6 NB |
1084 | mutex_lock(&tv_tpg->tv_tpg_mutex); |
1085 | tv_tpg->tv_tpg_port_count--; | |
1086 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
057cbf49 NB |
1087 | } |
1088 | ||
1089 | static struct se_node_acl *tcm_vhost_make_nodeacl( | |
1090 | struct se_portal_group *se_tpg, | |
1091 | struct config_group *group, | |
1092 | const char *name) | |
1093 | { | |
1094 | struct se_node_acl *se_nacl, *se_nacl_new; | |
1095 | struct tcm_vhost_nacl *nacl; | |
1096 | u64 wwpn = 0; | |
1097 | u32 nexus_depth; | |
1098 | ||
1099 | /* tcm_vhost_parse_wwn(name, &wwpn, 1) < 0) | |
1100 | return ERR_PTR(-EINVAL); */ | |
1101 | se_nacl_new = tcm_vhost_alloc_fabric_acl(se_tpg); | |
1102 | if (!se_nacl_new) | |
1103 | return ERR_PTR(-ENOMEM); | |
1104 | ||
1105 | nexus_depth = 1; | |
1106 | /* | |
1107 | * se_nacl_new may be released by core_tpg_add_initiator_node_acl() | |
1108 | * when converting a NodeACL from demo mode -> explict | |
1109 | */ | |
1110 | se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new, | |
1111 | name, nexus_depth); | |
1112 | if (IS_ERR(se_nacl)) { | |
1113 | tcm_vhost_release_fabric_acl(se_tpg, se_nacl_new); | |
1114 | return se_nacl; | |
1115 | } | |
1116 | /* | |
1117 | * Locate our struct tcm_vhost_nacl and set the FC Nport WWPN | |
1118 | */ | |
1119 | nacl = container_of(se_nacl, struct tcm_vhost_nacl, se_node_acl); | |
1120 | nacl->iport_wwpn = wwpn; | |
1121 | ||
1122 | return se_nacl; | |
1123 | } | |
1124 | ||
1125 | static void tcm_vhost_drop_nodeacl(struct se_node_acl *se_acl) | |
1126 | { | |
1127 | struct tcm_vhost_nacl *nacl = container_of(se_acl, | |
1128 | struct tcm_vhost_nacl, se_node_acl); | |
1129 | core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1); | |
1130 | kfree(nacl); | |
1131 | } | |
1132 | ||
101998f6 | 1133 | static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tv_tpg, |
057cbf49 NB |
1134 | const char *name) |
1135 | { | |
1136 | struct se_portal_group *se_tpg; | |
1137 | struct tcm_vhost_nexus *tv_nexus; | |
1138 | ||
1139 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
1140 | if (tv_tpg->tpg_nexus) { | |
1141 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1142 | pr_debug("tv_tpg->tpg_nexus already exists\n"); | |
1143 | return -EEXIST; | |
1144 | } | |
1145 | se_tpg = &tv_tpg->se_tpg; | |
1146 | ||
1147 | tv_nexus = kzalloc(sizeof(struct tcm_vhost_nexus), GFP_KERNEL); | |
1148 | if (!tv_nexus) { | |
1149 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1150 | pr_err("Unable to allocate struct tcm_vhost_nexus\n"); | |
1151 | return -ENOMEM; | |
1152 | } | |
1153 | /* | |
1154 | * Initialize the struct se_session pointer | |
1155 | */ | |
1156 | tv_nexus->tvn_se_sess = transport_init_session(); | |
1157 | if (IS_ERR(tv_nexus->tvn_se_sess)) { | |
1158 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1159 | kfree(tv_nexus); | |
1160 | return -ENOMEM; | |
1161 | } | |
1162 | /* | |
1163 | * Since we are running in 'demo mode' this call with generate a | |
1164 | * struct se_node_acl for the tcm_vhost struct se_portal_group with | |
1165 | * the SCSI Initiator port name of the passed configfs group 'name'. | |
1166 | */ | |
1167 | tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl( | |
1168 | se_tpg, (unsigned char *)name); | |
1169 | if (!tv_nexus->tvn_se_sess->se_node_acl) { | |
1170 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1171 | pr_debug("core_tpg_check_initiator_node_acl() failed" | |
1172 | " for %s\n", name); | |
1173 | transport_free_session(tv_nexus->tvn_se_sess); | |
1174 | kfree(tv_nexus); | |
1175 | return -ENOMEM; | |
1176 | } | |
1177 | /* | |
101998f6 | 1178 | * Now register the TCM vhost virtual I_T Nexus as active with the |
057cbf49 NB |
1179 | * call to __transport_register_session() |
1180 | */ | |
1181 | __transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl, | |
1182 | tv_nexus->tvn_se_sess, tv_nexus); | |
1183 | tv_tpg->tpg_nexus = tv_nexus; | |
1184 | ||
1185 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1186 | return 0; | |
1187 | } | |
1188 | ||
101998f6 | 1189 | static int tcm_vhost_drop_nexus(struct tcm_vhost_tpg *tpg) |
057cbf49 NB |
1190 | { |
1191 | struct se_session *se_sess; | |
1192 | struct tcm_vhost_nexus *tv_nexus; | |
1193 | ||
1194 | mutex_lock(&tpg->tv_tpg_mutex); | |
1195 | tv_nexus = tpg->tpg_nexus; | |
1196 | if (!tv_nexus) { | |
1197 | mutex_unlock(&tpg->tv_tpg_mutex); | |
1198 | return -ENODEV; | |
1199 | } | |
1200 | ||
1201 | se_sess = tv_nexus->tvn_se_sess; | |
1202 | if (!se_sess) { | |
1203 | mutex_unlock(&tpg->tv_tpg_mutex); | |
1204 | return -ENODEV; | |
1205 | } | |
1206 | ||
101998f6 | 1207 | if (tpg->tv_tpg_port_count != 0) { |
057cbf49 | 1208 | mutex_unlock(&tpg->tv_tpg_mutex); |
101998f6 | 1209 | pr_err("Unable to remove TCM_vhost I_T Nexus with" |
057cbf49 | 1210 | " active TPG port count: %d\n", |
101998f6 NB |
1211 | tpg->tv_tpg_port_count); |
1212 | return -EBUSY; | |
057cbf49 NB |
1213 | } |
1214 | ||
101998f6 | 1215 | if (tpg->tv_tpg_vhost_count != 0) { |
057cbf49 | 1216 | mutex_unlock(&tpg->tv_tpg_mutex); |
101998f6 | 1217 | pr_err("Unable to remove TCM_vhost I_T Nexus with" |
057cbf49 | 1218 | " active TPG vhost count: %d\n", |
101998f6 NB |
1219 | tpg->tv_tpg_vhost_count); |
1220 | return -EBUSY; | |
057cbf49 NB |
1221 | } |
1222 | ||
101998f6 | 1223 | pr_debug("TCM_vhost_ConfigFS: Removing I_T Nexus to emulated" |
057cbf49 NB |
1224 | " %s Initiator Port: %s\n", tcm_vhost_dump_proto_id(tpg->tport), |
1225 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1226 | /* | |
101998f6 | 1227 | * Release the SCSI I_T Nexus to the emulated vhost Target Port |
057cbf49 NB |
1228 | */ |
1229 | transport_deregister_session(tv_nexus->tvn_se_sess); | |
1230 | tpg->tpg_nexus = NULL; | |
1231 | mutex_unlock(&tpg->tv_tpg_mutex); | |
1232 | ||
1233 | kfree(tv_nexus); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
101998f6 | 1237 | static ssize_t tcm_vhost_tpg_show_nexus(struct se_portal_group *se_tpg, |
057cbf49 NB |
1238 | char *page) |
1239 | { | |
1240 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1241 | struct tcm_vhost_tpg, se_tpg); | |
1242 | struct tcm_vhost_nexus *tv_nexus; | |
1243 | ssize_t ret; | |
1244 | ||
1245 | mutex_lock(&tv_tpg->tv_tpg_mutex); | |
1246 | tv_nexus = tv_tpg->tpg_nexus; | |
1247 | if (!tv_nexus) { | |
1248 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1249 | return -ENODEV; | |
1250 | } | |
1251 | ret = snprintf(page, PAGE_SIZE, "%s\n", | |
1252 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1253 | mutex_unlock(&tv_tpg->tv_tpg_mutex); | |
1254 | ||
1255 | return ret; | |
1256 | } | |
1257 | ||
101998f6 | 1258 | static ssize_t tcm_vhost_tpg_store_nexus(struct se_portal_group *se_tpg, |
057cbf49 NB |
1259 | const char *page, |
1260 | size_t count) | |
1261 | { | |
1262 | struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, | |
1263 | struct tcm_vhost_tpg, se_tpg); | |
1264 | struct tcm_vhost_tport *tport_wwn = tv_tpg->tport; | |
1265 | unsigned char i_port[TCM_VHOST_NAMELEN], *ptr, *port_ptr; | |
1266 | int ret; | |
1267 | /* | |
1268 | * Shutdown the active I_T nexus if 'NULL' is passed.. | |
1269 | */ | |
1270 | if (!strncmp(page, "NULL", 4)) { | |
1271 | ret = tcm_vhost_drop_nexus(tv_tpg); | |
1272 | return (!ret) ? count : ret; | |
1273 | } | |
1274 | /* | |
1275 | * Otherwise make sure the passed virtual Initiator port WWN matches | |
1276 | * the fabric protocol_id set in tcm_vhost_make_tport(), and call | |
1277 | * tcm_vhost_make_nexus(). | |
1278 | */ | |
1279 | if (strlen(page) >= TCM_VHOST_NAMELEN) { | |
1280 | pr_err("Emulated NAA Sas Address: %s, exceeds" | |
1281 | " max: %d\n", page, TCM_VHOST_NAMELEN); | |
1282 | return -EINVAL; | |
1283 | } | |
1284 | snprintf(&i_port[0], TCM_VHOST_NAMELEN, "%s", page); | |
1285 | ||
1286 | ptr = strstr(i_port, "naa."); | |
1287 | if (ptr) { | |
1288 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_SAS) { | |
1289 | pr_err("Passed SAS Initiator Port %s does not" | |
1290 | " match target port protoid: %s\n", i_port, | |
1291 | tcm_vhost_dump_proto_id(tport_wwn)); | |
1292 | return -EINVAL; | |
1293 | } | |
1294 | port_ptr = &i_port[0]; | |
1295 | goto check_newline; | |
1296 | } | |
1297 | ptr = strstr(i_port, "fc."); | |
1298 | if (ptr) { | |
1299 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_FCP) { | |
1300 | pr_err("Passed FCP Initiator Port %s does not" | |
1301 | " match target port protoid: %s\n", i_port, | |
1302 | tcm_vhost_dump_proto_id(tport_wwn)); | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | port_ptr = &i_port[3]; /* Skip over "fc." */ | |
1306 | goto check_newline; | |
1307 | } | |
1308 | ptr = strstr(i_port, "iqn."); | |
1309 | if (ptr) { | |
1310 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_ISCSI) { | |
1311 | pr_err("Passed iSCSI Initiator Port %s does not" | |
1312 | " match target port protoid: %s\n", i_port, | |
1313 | tcm_vhost_dump_proto_id(tport_wwn)); | |
1314 | return -EINVAL; | |
1315 | } | |
1316 | port_ptr = &i_port[0]; | |
1317 | goto check_newline; | |
1318 | } | |
1319 | pr_err("Unable to locate prefix for emulated Initiator Port:" | |
1320 | " %s\n", i_port); | |
1321 | return -EINVAL; | |
1322 | /* | |
1323 | * Clear any trailing newline for the NAA WWN | |
1324 | */ | |
1325 | check_newline: | |
1326 | if (i_port[strlen(i_port)-1] == '\n') | |
1327 | i_port[strlen(i_port)-1] = '\0'; | |
1328 | ||
1329 | ret = tcm_vhost_make_nexus(tv_tpg, port_ptr); | |
1330 | if (ret < 0) | |
1331 | return ret; | |
1332 | ||
1333 | return count; | |
1334 | } | |
1335 | ||
1336 | TF_TPG_BASE_ATTR(tcm_vhost, nexus, S_IRUGO | S_IWUSR); | |
1337 | ||
1338 | static struct configfs_attribute *tcm_vhost_tpg_attrs[] = { | |
1339 | &tcm_vhost_tpg_nexus.attr, | |
1340 | NULL, | |
1341 | }; | |
1342 | ||
101998f6 | 1343 | static struct se_portal_group *tcm_vhost_make_tpg(struct se_wwn *wwn, |
057cbf49 NB |
1344 | struct config_group *group, |
1345 | const char *name) | |
1346 | { | |
1347 | struct tcm_vhost_tport *tport = container_of(wwn, | |
1348 | struct tcm_vhost_tport, tport_wwn); | |
1349 | ||
1350 | struct tcm_vhost_tpg *tpg; | |
1351 | unsigned long tpgt; | |
1352 | int ret; | |
1353 | ||
1354 | if (strstr(name, "tpgt_") != name) | |
1355 | return ERR_PTR(-EINVAL); | |
1356 | if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) | |
1357 | return ERR_PTR(-EINVAL); | |
1358 | ||
1359 | tpg = kzalloc(sizeof(struct tcm_vhost_tpg), GFP_KERNEL); | |
1360 | if (!tpg) { | |
1361 | pr_err("Unable to allocate struct tcm_vhost_tpg"); | |
1362 | return ERR_PTR(-ENOMEM); | |
1363 | } | |
1364 | mutex_init(&tpg->tv_tpg_mutex); | |
1365 | INIT_LIST_HEAD(&tpg->tv_tpg_list); | |
1366 | tpg->tport = tport; | |
1367 | tpg->tport_tpgt = tpgt; | |
1368 | ||
1369 | ret = core_tpg_register(&tcm_vhost_fabric_configfs->tf_ops, wwn, | |
1370 | &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL); | |
1371 | if (ret < 0) { | |
1372 | kfree(tpg); | |
1373 | return NULL; | |
1374 | } | |
1375 | mutex_lock(&tcm_vhost_mutex); | |
1376 | list_add_tail(&tpg->tv_tpg_list, &tcm_vhost_list); | |
1377 | mutex_unlock(&tcm_vhost_mutex); | |
1378 | ||
1379 | return &tpg->se_tpg; | |
1380 | } | |
1381 | ||
1382 | static void tcm_vhost_drop_tpg(struct se_portal_group *se_tpg) | |
1383 | { | |
1384 | struct tcm_vhost_tpg *tpg = container_of(se_tpg, | |
1385 | struct tcm_vhost_tpg, se_tpg); | |
1386 | ||
1387 | mutex_lock(&tcm_vhost_mutex); | |
1388 | list_del(&tpg->tv_tpg_list); | |
1389 | mutex_unlock(&tcm_vhost_mutex); | |
1390 | /* | |
101998f6 | 1391 | * Release the virtual I_T Nexus for this vhost TPG |
057cbf49 NB |
1392 | */ |
1393 | tcm_vhost_drop_nexus(tpg); | |
1394 | /* | |
1395 | * Deregister the se_tpg from TCM.. | |
1396 | */ | |
1397 | core_tpg_deregister(se_tpg); | |
1398 | kfree(tpg); | |
1399 | } | |
1400 | ||
101998f6 | 1401 | static struct se_wwn *tcm_vhost_make_tport(struct target_fabric_configfs *tf, |
057cbf49 NB |
1402 | struct config_group *group, |
1403 | const char *name) | |
1404 | { | |
1405 | struct tcm_vhost_tport *tport; | |
1406 | char *ptr; | |
1407 | u64 wwpn = 0; | |
1408 | int off = 0; | |
1409 | ||
1410 | /* if (tcm_vhost_parse_wwn(name, &wwpn, 1) < 0) | |
1411 | return ERR_PTR(-EINVAL); */ | |
1412 | ||
1413 | tport = kzalloc(sizeof(struct tcm_vhost_tport), GFP_KERNEL); | |
1414 | if (!tport) { | |
1415 | pr_err("Unable to allocate struct tcm_vhost_tport"); | |
1416 | return ERR_PTR(-ENOMEM); | |
1417 | } | |
1418 | tport->tport_wwpn = wwpn; | |
1419 | /* | |
1420 | * Determine the emulated Protocol Identifier and Target Port Name | |
1421 | * based on the incoming configfs directory name. | |
1422 | */ | |
1423 | ptr = strstr(name, "naa."); | |
1424 | if (ptr) { | |
1425 | tport->tport_proto_id = SCSI_PROTOCOL_SAS; | |
1426 | goto check_len; | |
1427 | } | |
1428 | ptr = strstr(name, "fc."); | |
1429 | if (ptr) { | |
1430 | tport->tport_proto_id = SCSI_PROTOCOL_FCP; | |
1431 | off = 3; /* Skip over "fc." */ | |
1432 | goto check_len; | |
1433 | } | |
1434 | ptr = strstr(name, "iqn."); | |
1435 | if (ptr) { | |
1436 | tport->tport_proto_id = SCSI_PROTOCOL_ISCSI; | |
1437 | goto check_len; | |
1438 | } | |
1439 | ||
1440 | pr_err("Unable to locate prefix for emulated Target Port:" | |
1441 | " %s\n", name); | |
1442 | kfree(tport); | |
1443 | return ERR_PTR(-EINVAL); | |
1444 | ||
1445 | check_len: | |
1446 | if (strlen(name) >= TCM_VHOST_NAMELEN) { | |
1447 | pr_err("Emulated %s Address: %s, exceeds" | |
1448 | " max: %d\n", name, tcm_vhost_dump_proto_id(tport), | |
1449 | TCM_VHOST_NAMELEN); | |
1450 | kfree(tport); | |
1451 | return ERR_PTR(-EINVAL); | |
1452 | } | |
1453 | snprintf(&tport->tport_name[0], TCM_VHOST_NAMELEN, "%s", &name[off]); | |
1454 | ||
1455 | pr_debug("TCM_VHost_ConfigFS: Allocated emulated Target" | |
1456 | " %s Address: %s\n", tcm_vhost_dump_proto_id(tport), name); | |
1457 | ||
1458 | return &tport->tport_wwn; | |
1459 | } | |
1460 | ||
1461 | static void tcm_vhost_drop_tport(struct se_wwn *wwn) | |
1462 | { | |
1463 | struct tcm_vhost_tport *tport = container_of(wwn, | |
1464 | struct tcm_vhost_tport, tport_wwn); | |
1465 | ||
1466 | pr_debug("TCM_VHost_ConfigFS: Deallocating emulated Target" | |
1467 | " %s Address: %s\n", tcm_vhost_dump_proto_id(tport), | |
1468 | tport->tport_name); | |
1469 | ||
1470 | kfree(tport); | |
1471 | } | |
1472 | ||
1473 | static ssize_t tcm_vhost_wwn_show_attr_version( | |
1474 | struct target_fabric_configfs *tf, | |
1475 | char *page) | |
1476 | { | |
1477 | return sprintf(page, "TCM_VHOST fabric module %s on %s/%s" | |
1478 | "on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname, | |
1479 | utsname()->machine); | |
1480 | } | |
1481 | ||
1482 | TF_WWN_ATTR_RO(tcm_vhost, version); | |
1483 | ||
1484 | static struct configfs_attribute *tcm_vhost_wwn_attrs[] = { | |
1485 | &tcm_vhost_wwn_version.attr, | |
1486 | NULL, | |
1487 | }; | |
1488 | ||
1489 | static struct target_core_fabric_ops tcm_vhost_ops = { | |
1490 | .get_fabric_name = tcm_vhost_get_fabric_name, | |
1491 | .get_fabric_proto_ident = tcm_vhost_get_fabric_proto_ident, | |
1492 | .tpg_get_wwn = tcm_vhost_get_fabric_wwn, | |
1493 | .tpg_get_tag = tcm_vhost_get_tag, | |
1494 | .tpg_get_default_depth = tcm_vhost_get_default_depth, | |
1495 | .tpg_get_pr_transport_id = tcm_vhost_get_pr_transport_id, | |
1496 | .tpg_get_pr_transport_id_len = tcm_vhost_get_pr_transport_id_len, | |
1497 | .tpg_parse_pr_out_transport_id = tcm_vhost_parse_pr_out_transport_id, | |
1498 | .tpg_check_demo_mode = tcm_vhost_check_true, | |
1499 | .tpg_check_demo_mode_cache = tcm_vhost_check_true, | |
1500 | .tpg_check_demo_mode_write_protect = tcm_vhost_check_false, | |
1501 | .tpg_check_prod_mode_write_protect = tcm_vhost_check_false, | |
1502 | .tpg_alloc_fabric_acl = tcm_vhost_alloc_fabric_acl, | |
1503 | .tpg_release_fabric_acl = tcm_vhost_release_fabric_acl, | |
1504 | .tpg_get_inst_index = tcm_vhost_tpg_get_inst_index, | |
1505 | .release_cmd = tcm_vhost_release_cmd, | |
1506 | .shutdown_session = tcm_vhost_shutdown_session, | |
1507 | .close_session = tcm_vhost_close_session, | |
1508 | .sess_get_index = tcm_vhost_sess_get_index, | |
1509 | .sess_get_initiator_sid = NULL, | |
1510 | .write_pending = tcm_vhost_write_pending, | |
1511 | .write_pending_status = tcm_vhost_write_pending_status, | |
1512 | .set_default_node_attributes = tcm_vhost_set_default_node_attrs, | |
1513 | .get_task_tag = tcm_vhost_get_task_tag, | |
1514 | .get_cmd_state = tcm_vhost_get_cmd_state, | |
1515 | .queue_data_in = tcm_vhost_queue_data_in, | |
1516 | .queue_status = tcm_vhost_queue_status, | |
1517 | .queue_tm_rsp = tcm_vhost_queue_tm_rsp, | |
057cbf49 NB |
1518 | /* |
1519 | * Setup callers for generic logic in target_core_fabric_configfs.c | |
1520 | */ | |
1521 | .fabric_make_wwn = tcm_vhost_make_tport, | |
1522 | .fabric_drop_wwn = tcm_vhost_drop_tport, | |
1523 | .fabric_make_tpg = tcm_vhost_make_tpg, | |
1524 | .fabric_drop_tpg = tcm_vhost_drop_tpg, | |
1525 | .fabric_post_link = tcm_vhost_port_link, | |
1526 | .fabric_pre_unlink = tcm_vhost_port_unlink, | |
1527 | .fabric_make_np = NULL, | |
1528 | .fabric_drop_np = NULL, | |
1529 | .fabric_make_nodeacl = tcm_vhost_make_nodeacl, | |
1530 | .fabric_drop_nodeacl = tcm_vhost_drop_nodeacl, | |
1531 | }; | |
1532 | ||
1533 | static int tcm_vhost_register_configfs(void) | |
1534 | { | |
1535 | struct target_fabric_configfs *fabric; | |
1536 | int ret; | |
1537 | ||
1538 | pr_debug("TCM_VHOST fabric module %s on %s/%s" | |
1539 | " on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname, | |
1540 | utsname()->machine); | |
1541 | /* | |
1542 | * Register the top level struct config_item_type with TCM core | |
1543 | */ | |
1544 | fabric = target_fabric_configfs_init(THIS_MODULE, "vhost"); | |
1545 | if (IS_ERR(fabric)) { | |
1546 | pr_err("target_fabric_configfs_init() failed\n"); | |
1547 | return PTR_ERR(fabric); | |
1548 | } | |
1549 | /* | |
1550 | * Setup fabric->tf_ops from our local tcm_vhost_ops | |
1551 | */ | |
1552 | fabric->tf_ops = tcm_vhost_ops; | |
1553 | /* | |
1554 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
1555 | */ | |
1556 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_vhost_wwn_attrs; | |
1557 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_vhost_tpg_attrs; | |
1558 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; | |
1559 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
1560 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
1561 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL; | |
1562 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
1563 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
1564 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
1565 | /* | |
1566 | * Register the fabric for use within TCM | |
1567 | */ | |
1568 | ret = target_fabric_configfs_register(fabric); | |
1569 | if (ret < 0) { | |
1570 | pr_err("target_fabric_configfs_register() failed" | |
1571 | " for TCM_VHOST\n"); | |
1572 | return ret; | |
1573 | } | |
1574 | /* | |
1575 | * Setup our local pointer to *fabric | |
1576 | */ | |
1577 | tcm_vhost_fabric_configfs = fabric; | |
1578 | pr_debug("TCM_VHOST[0] - Set fabric -> tcm_vhost_fabric_configfs\n"); | |
1579 | return 0; | |
1580 | }; | |
1581 | ||
1582 | static void tcm_vhost_deregister_configfs(void) | |
1583 | { | |
1584 | if (!tcm_vhost_fabric_configfs) | |
1585 | return; | |
1586 | ||
1587 | target_fabric_configfs_deregister(tcm_vhost_fabric_configfs); | |
1588 | tcm_vhost_fabric_configfs = NULL; | |
1589 | pr_debug("TCM_VHOST[0] - Cleared tcm_vhost_fabric_configfs\n"); | |
1590 | }; | |
1591 | ||
1592 | static int __init tcm_vhost_init(void) | |
1593 | { | |
1594 | int ret = -ENOMEM; | |
101998f6 NB |
1595 | /* |
1596 | * Use our own dedicated workqueue for submitting I/O into | |
1597 | * target core to avoid contention within system_wq. | |
1598 | */ | |
057cbf49 NB |
1599 | tcm_vhost_workqueue = alloc_workqueue("tcm_vhost", 0, 0); |
1600 | if (!tcm_vhost_workqueue) | |
1601 | goto out; | |
1602 | ||
1603 | ret = vhost_scsi_register(); | |
1604 | if (ret < 0) | |
1605 | goto out_destroy_workqueue; | |
1606 | ||
1607 | ret = tcm_vhost_register_configfs(); | |
1608 | if (ret < 0) | |
1609 | goto out_vhost_scsi_deregister; | |
1610 | ||
1611 | return 0; | |
1612 | ||
1613 | out_vhost_scsi_deregister: | |
1614 | vhost_scsi_deregister(); | |
1615 | out_destroy_workqueue: | |
1616 | destroy_workqueue(tcm_vhost_workqueue); | |
1617 | out: | |
1618 | return ret; | |
1619 | }; | |
1620 | ||
1621 | static void tcm_vhost_exit(void) | |
1622 | { | |
1623 | tcm_vhost_deregister_configfs(); | |
1624 | vhost_scsi_deregister(); | |
1625 | destroy_workqueue(tcm_vhost_workqueue); | |
1626 | }; | |
1627 | ||
1628 | MODULE_DESCRIPTION("TCM_VHOST series fabric driver"); | |
1629 | MODULE_LICENSE("GPL"); | |
1630 | module_init(tcm_vhost_init); | |
1631 | module_exit(tcm_vhost_exit); |