Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_alua.c | |
3 | * | |
4 | * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA) | |
5 | * | |
4c76251e | 6 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/slab.h> |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/configfs.h> | |
c53181af | 29 | #include <linux/export.h> |
0e9b10a9 | 30 | #include <linux/file.h> |
c66ac9db NB |
31 | #include <scsi/scsi.h> |
32 | #include <scsi/scsi_cmnd.h> | |
33395fb8 | 33 | #include <asm/unaligned.h> |
c66ac9db NB |
34 | |
35 | #include <target/target_core_base.h> | |
c4795fb2 CH |
36 | #include <target/target_core_backend.h> |
37 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
38 | #include <target/target_core_configfs.h> |
39 | ||
e26d99ae | 40 | #include "target_core_internal.h" |
c66ac9db | 41 | #include "target_core_alua.h" |
c66ac9db NB |
42 | #include "target_core_ua.h" |
43 | ||
bb91c1a0 HR |
44 | static sense_reason_t core_alua_check_transition(int state, int valid, |
45 | int *primary); | |
c66ac9db NB |
46 | static int core_alua_set_tg_pt_secondary_state( |
47 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
125d0119 | 48 | struct se_port *port, int explicit, int offline); |
c66ac9db | 49 | |
bb91c1a0 HR |
50 | static char *core_alua_dump_state(int state); |
51 | ||
e3d6f909 AG |
52 | static u16 alua_lu_gps_counter; |
53 | static u32 alua_lu_gps_count; | |
54 | ||
55 | static DEFINE_SPINLOCK(lu_gps_lock); | |
56 | static LIST_HEAD(lu_gps_list); | |
57 | ||
58 | struct t10_alua_lu_gp *default_lu_gp; | |
59 | ||
c66094bf HR |
60 | /* |
61 | * REPORT REFERRALS | |
62 | * | |
63 | * See sbc3r35 section 5.23 | |
64 | */ | |
65 | sense_reason_t | |
66 | target_emulate_report_referrals(struct se_cmd *cmd) | |
67 | { | |
68 | struct se_device *dev = cmd->se_dev; | |
69 | struct t10_alua_lba_map *map; | |
70 | struct t10_alua_lba_map_member *map_mem; | |
71 | unsigned char *buf; | |
72 | u32 rd_len = 0, off; | |
73 | ||
74 | if (cmd->data_length < 4) { | |
75 | pr_warn("REPORT REFERRALS allocation length %u too" | |
76 | " small\n", cmd->data_length); | |
77 | return TCM_INVALID_CDB_FIELD; | |
78 | } | |
79 | ||
80 | buf = transport_kmap_data_sg(cmd); | |
81 | if (!buf) | |
82 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
83 | ||
84 | off = 4; | |
85 | spin_lock(&dev->t10_alua.lba_map_lock); | |
86 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
87 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
88 | transport_kunmap_data_sg(cmd); | |
89 | ||
90 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
91 | } | |
92 | ||
93 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
94 | lba_map_list) { | |
95 | int desc_num = off + 3; | |
96 | int pg_num; | |
97 | ||
98 | off += 4; | |
38edd724 HR |
99 | if (cmd->data_length > off) |
100 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 101 | off += 8; |
38edd724 HR |
102 | if (cmd->data_length > off) |
103 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
104 | off += 8; |
105 | rd_len += 20; | |
106 | pg_num = 0; | |
107 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
108 | lba_map_mem_list) { | |
38edd724 HR |
109 | int alua_state = map_mem->lba_map_mem_alua_state; |
110 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
111 | ||
112 | if (cmd->data_length > off) | |
113 | buf[off] = alua_state & 0x0f; | |
114 | off += 2; | |
115 | if (cmd->data_length > off) | |
116 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
117 | off++; | |
118 | if (cmd->data_length > off) | |
119 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 120 | off++; |
c66094bf HR |
121 | rd_len += 4; |
122 | pg_num++; | |
123 | } | |
38edd724 HR |
124 | if (cmd->data_length > desc_num) |
125 | buf[desc_num] = pg_num; | |
c66094bf HR |
126 | } |
127 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
128 | ||
129 | /* | |
130 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
131 | */ | |
132 | put_unaligned_be16(rd_len, &buf[2]); | |
133 | ||
134 | transport_kunmap_data_sg(cmd); | |
135 | ||
136 | target_complete_cmd(cmd, GOOD); | |
137 | return 0; | |
138 | } | |
139 | ||
c66ac9db NB |
140 | /* |
141 | * REPORT_TARGET_PORT_GROUPS | |
142 | * | |
143 | * See spc4r17 section 6.27 | |
144 | */ | |
de103c93 CH |
145 | sense_reason_t |
146 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 147 | { |
0fd97ccf | 148 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
149 | struct se_port *port; |
150 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
151 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
05d1c7c0 | 152 | unsigned char *buf; |
5b9a4d72 NB |
153 | u32 rd_len = 0, off; |
154 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 155 | |
6b20fa9a | 156 | /* |
5b9a4d72 NB |
157 | * Skip over RESERVED area to first Target port group descriptor |
158 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 159 | */ |
5b9a4d72 NB |
160 | if (ext_hdr != 0) |
161 | off = 8; | |
162 | else | |
163 | off = 4; | |
164 | ||
165 | if (cmd->data_length < off) { | |
166 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
167 | " small for %s header\n", cmd->data_length, | |
168 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 169 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 170 | } |
4949314c | 171 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
172 | if (!buf) |
173 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 174 | |
0fd97ccf CH |
175 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
176 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 177 | tg_pt_gp_list) { |
6b20fa9a NB |
178 | /* |
179 | * Check if the Target port group and Target port descriptor list | |
180 | * based on tg_pt_gp_members count will fit into the response payload. | |
181 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
182 | * the allocation length and the response is truncated. | |
183 | */ | |
184 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
185 | cmd->data_length) { | |
186 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
187 | continue; | |
188 | } | |
c66ac9db NB |
189 | /* |
190 | * PREF: Preferred target port bit, determine if this | |
191 | * bit should be set for port group. | |
192 | */ | |
193 | if (tg_pt_gp->tg_pt_gp_pref) | |
194 | buf[off] = 0x80; | |
195 | /* | |
196 | * Set the ASYMMETRIC ACCESS State | |
197 | */ | |
198 | buf[off++] |= (atomic_read( | |
199 | &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff); | |
200 | /* | |
201 | * Set supported ASYMMETRIC ACCESS State bits | |
202 | */ | |
c0dc941e | 203 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
204 | /* |
205 | * TARGET PORT GROUP | |
206 | */ | |
207 | buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff); | |
208 | buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff); | |
209 | ||
210 | off++; /* Skip over Reserved */ | |
211 | /* | |
212 | * STATUS CODE | |
213 | */ | |
214 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
215 | /* | |
216 | * Vendor Specific field | |
217 | */ | |
218 | buf[off++] = 0x00; | |
219 | /* | |
220 | * TARGET PORT COUNT | |
221 | */ | |
222 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
223 | rd_len += 8; | |
224 | ||
225 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
226 | list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, | |
227 | tg_pt_gp_mem_list) { | |
228 | port = tg_pt_gp_mem->tg_pt; | |
229 | /* | |
230 | * Start Target Port descriptor format | |
231 | * | |
232 | * See spc4r17 section 6.2.7 Table 247 | |
233 | */ | |
234 | off += 2; /* Skip over Obsolete */ | |
235 | /* | |
236 | * Set RELATIVE TARGET PORT IDENTIFIER | |
237 | */ | |
238 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
239 | buf[off++] = (port->sep_rtpi & 0xff); | |
240 | rd_len += 4; | |
241 | } | |
242 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
243 | } | |
0fd97ccf | 244 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
245 | /* |
246 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
247 | */ | |
5b9a4d72 | 248 | put_unaligned_be32(rd_len, &buf[0]); |
c66ac9db | 249 | |
5b9a4d72 NB |
250 | /* |
251 | * Fill in the Extended header parameter data format if requested | |
252 | */ | |
253 | if (ext_hdr != 0) { | |
254 | buf[4] = 0x10; | |
255 | /* | |
125d0119 | 256 | * Set the implicit transition time (in seconds) for the application |
5b9a4d72 NB |
257 | * client to use as a base for it's transition timeout value. |
258 | * | |
259 | * Use the current tg_pt_gp_mem -> tg_pt_gp membership from the LUN | |
260 | * this CDB was received upon to determine this value individually | |
261 | * for ALUA target port group. | |
262 | */ | |
263 | port = cmd->se_lun->lun_sep; | |
264 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
265 | if (tg_pt_gp_mem) { | |
266 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
267 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
268 | if (tg_pt_gp) | |
125d0119 | 269 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; |
5b9a4d72 NB |
270 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
271 | } | |
272 | } | |
4949314c | 273 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 274 | |
6bb35e00 | 275 | target_complete_cmd(cmd, GOOD); |
c66ac9db NB |
276 | return 0; |
277 | } | |
278 | ||
279 | /* | |
125d0119 | 280 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
281 | * |
282 | * See spc4r17 section 6.35 | |
283 | */ | |
de103c93 CH |
284 | sense_reason_t |
285 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 286 | { |
5951146d | 287 | struct se_device *dev = cmd->se_dev; |
e3d6f909 AG |
288 | struct se_port *port, *l_port = cmd->se_lun->lun_sep; |
289 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; | |
c66ac9db NB |
290 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
291 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem; | |
05d1c7c0 AG |
292 | unsigned char *buf; |
293 | unsigned char *ptr; | |
a0d50f62 | 294 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 295 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 296 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
297 | u16 tg_pt_id, rtpi; |
298 | ||
de103c93 CH |
299 | if (!l_port) |
300 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
301 | ||
0d7f1299 PB |
302 | if (cmd->data_length < 4) { |
303 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
304 | " small\n", cmd->data_length); | |
de103c93 | 305 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
306 | } |
307 | ||
4949314c | 308 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
309 | if (!buf) |
310 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 311 | |
c66ac9db | 312 | /* |
125d0119 | 313 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
314 | * for the local tg_pt_gp. |
315 | */ | |
316 | l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem; | |
6708bb27 AG |
317 | if (!l_tg_pt_gp_mem) { |
318 | pr_err("Unable to access l_port->sep_alua_tg_pt_gp_mem\n"); | |
de103c93 | 319 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 320 | goto out; |
c66ac9db NB |
321 | } |
322 | spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
323 | l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 324 | if (!l_tg_pt_gp) { |
c66ac9db | 325 | spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
6708bb27 | 326 | pr_err("Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n"); |
de103c93 | 327 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 328 | goto out; |
c66ac9db | 329 | } |
c66ac9db NB |
330 | spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
331 | ||
125d0119 | 332 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
6708bb27 | 333 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 334 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 335 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 336 | goto out; |
c66ac9db | 337 | } |
bb91c1a0 | 338 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db | 339 | |
05d1c7c0 AG |
340 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
341 | ||
c66ac9db | 342 | while (len < cmd->data_length) { |
de103c93 | 343 | bool found = false; |
c66ac9db NB |
344 | alua_access_state = (ptr[0] & 0x0f); |
345 | /* | |
346 | * Check the received ALUA access state, and determine if | |
347 | * the state is a primary or secondary target port asymmetric | |
348 | * access state. | |
349 | */ | |
bb91c1a0 HR |
350 | rc = core_alua_check_transition(alua_access_state, |
351 | valid_states, &primary); | |
de103c93 | 352 | if (rc) { |
c66ac9db NB |
353 | /* |
354 | * If the SET TARGET PORT GROUPS attempts to establish | |
355 | * an invalid combination of target port asymmetric | |
356 | * access states or attempts to establish an | |
357 | * unsupported target port asymmetric access state, | |
358 | * then the command shall be terminated with CHECK | |
359 | * CONDITION status, with the sense key set to ILLEGAL | |
360 | * REQUEST, and the additional sense code set to INVALID | |
361 | * FIELD IN PARAMETER LIST. | |
362 | */ | |
05d1c7c0 | 363 | goto out; |
c66ac9db | 364 | } |
de103c93 | 365 | |
c66ac9db NB |
366 | /* |
367 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
368 | * specifies a primary target port asymmetric access state, | |
369 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
370 | * a primary target port group for which the primary target | |
371 | * port asymmetric access state shall be changed. If the | |
372 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
373 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
374 | * TARGET PORT field specifies the relative target port | |
375 | * identifier (see 3.1.120) of the target port for which the | |
376 | * secondary target port asymmetric access state shall be | |
377 | * changed. | |
378 | */ | |
379 | if (primary) { | |
33395fb8 | 380 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
381 | /* |
382 | * Locate the matching target port group ID from | |
383 | * the global tg_pt_gp list | |
384 | */ | |
0fd97ccf | 385 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 386 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 387 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 388 | tg_pt_gp_list) { |
6708bb27 | 389 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
390 | continue; |
391 | ||
392 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
393 | continue; | |
394 | ||
395 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
396 | smp_mb__after_atomic_inc(); | |
de103c93 | 397 | |
0fd97ccf | 398 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 399 | |
de103c93 | 400 | if (!core_alua_do_port_transition(tg_pt_gp, |
c66ac9db | 401 | dev, l_port, nacl, |
de103c93 CH |
402 | alua_access_state, 1)) |
403 | found = true; | |
c66ac9db | 404 | |
0fd97ccf | 405 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
406 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
407 | smp_mb__after_atomic_dec(); | |
408 | break; | |
409 | } | |
0fd97ccf | 410 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
411 | } else { |
412 | /* | |
f1ae05d5 | 413 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
414 | * the Target Port in question for the the incoming |
415 | * SET_TARGET_PORT_GROUPS op. | |
416 | */ | |
33395fb8 | 417 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 418 | /* |
35d1efe8 | 419 | * Locate the matching relative target port identifier |
c66ac9db NB |
420 | * for the struct se_device storage object. |
421 | */ | |
422 | spin_lock(&dev->se_port_lock); | |
423 | list_for_each_entry(port, &dev->dev_sep_list, | |
424 | sep_list) { | |
425 | if (port->sep_rtpi != rtpi) | |
426 | continue; | |
427 | ||
428 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
de103c93 | 429 | |
c66ac9db NB |
430 | spin_unlock(&dev->se_port_lock); |
431 | ||
de103c93 CH |
432 | if (!core_alua_set_tg_pt_secondary_state( |
433 | tg_pt_gp_mem, port, 1, 1)) | |
434 | found = true; | |
c66ac9db NB |
435 | |
436 | spin_lock(&dev->se_port_lock); | |
437 | break; | |
438 | } | |
439 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
440 | } |
441 | ||
442 | if (!found) { | |
443 | rc = TCM_INVALID_PARAMETER_LIST; | |
444 | goto out; | |
c66ac9db NB |
445 | } |
446 | ||
447 | ptr += 4; | |
448 | len += 4; | |
449 | } | |
450 | ||
05d1c7c0 | 451 | out: |
4949314c | 452 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
453 | if (!rc) |
454 | target_complete_cmd(cmd, GOOD); | |
455 | return rc; | |
c66ac9db NB |
456 | } |
457 | ||
1e3ab99d PB |
458 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
459 | { | |
460 | /* | |
461 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
462 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
463 | * by the ALUA primary or secondary access state.. | |
464 | */ | |
465 | pr_debug("[%s]: ALUA TG Port not available, " | |
466 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
467 | "0x04/0x%02x\n", | |
468 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
469 | ||
470 | cmd->scsi_asc = 0x04; | |
471 | cmd->scsi_ascq = alua_ascq; | |
472 | } | |
473 | ||
474 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
475 | struct se_cmd *cmd, |
476 | unsigned char *cdb, | |
1e3ab99d | 477 | int nonop_delay_msecs) |
c66ac9db NB |
478 | { |
479 | /* | |
480 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
481 | * later to determine if processing of this cmd needs to be | |
482 | * temporarily delayed for the Active/NonOptimized primary access state. | |
483 | */ | |
484 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
485 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
486 | } |
487 | ||
c66094bf HR |
488 | static inline int core_alua_state_lba_dependent( |
489 | struct se_cmd *cmd, | |
1e3ab99d | 490 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
491 | { |
492 | struct se_device *dev = cmd->se_dev; | |
493 | u64 segment_size, segment_mult, sectors, lba; | |
494 | ||
495 | /* Only need to check for cdb actually containing LBAs */ | |
496 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
497 | return 0; | |
498 | ||
499 | spin_lock(&dev->t10_alua.lba_map_lock); | |
500 | segment_size = dev->t10_alua.lba_map_segment_size; | |
501 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
502 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
503 | ||
504 | lba = cmd->t_task_lba; | |
505 | while (lba < cmd->t_task_lba + sectors) { | |
506 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
507 | struct t10_alua_lba_map_member *map_mem; | |
508 | ||
509 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
510 | lba_map_list) { | |
511 | u64 start_lba, last_lba; | |
512 | u64 first_lba = map->lba_map_first_lba; | |
513 | ||
514 | if (segment_mult) { | |
515 | u64 tmp = lba; | |
cdf55949 | 516 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
517 | |
518 | last_lba = first_lba + segment_size - 1; | |
519 | if (start_lba >= first_lba && | |
520 | start_lba <= last_lba) { | |
521 | lba += segment_size; | |
522 | cur_map = map; | |
523 | break; | |
524 | } | |
525 | } else { | |
526 | last_lba = map->lba_map_last_lba; | |
527 | if (lba >= first_lba && lba <= last_lba) { | |
528 | lba = last_lba + 1; | |
529 | cur_map = map; | |
530 | break; | |
531 | } | |
532 | } | |
533 | } | |
534 | if (!cur_map) { | |
535 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 536 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
537 | return 1; |
538 | } | |
539 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
540 | lba_map_mem_list) { | |
541 | if (map_mem->lba_map_mem_alua_pg_id != | |
542 | tg_pt_gp->tg_pt_gp_id) | |
543 | continue; | |
544 | switch(map_mem->lba_map_mem_alua_state) { | |
545 | case ALUA_ACCESS_STATE_STANDBY: | |
546 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 547 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
548 | return 1; |
549 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
550 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 551 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
552 | return 1; |
553 | default: | |
554 | break; | |
555 | } | |
556 | } | |
557 | } | |
558 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
559 | return 0; | |
560 | } | |
561 | ||
c66ac9db NB |
562 | static inline int core_alua_state_standby( |
563 | struct se_cmd *cmd, | |
1e3ab99d | 564 | unsigned char *cdb) |
c66ac9db NB |
565 | { |
566 | /* | |
567 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
568 | * spc4r17 section 5.9.2.4.4 | |
569 | */ | |
570 | switch (cdb[0]) { | |
571 | case INQUIRY: | |
572 | case LOG_SELECT: | |
573 | case LOG_SENSE: | |
574 | case MODE_SELECT: | |
575 | case MODE_SENSE: | |
576 | case REPORT_LUNS: | |
577 | case RECEIVE_DIAGNOSTIC: | |
578 | case SEND_DIAGNOSTIC: | |
30f359a6 | 579 | return 0; |
c66ac9db | 580 | case MAINTENANCE_IN: |
ba539743 | 581 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
582 | case MI_REPORT_TARGET_PGS: |
583 | return 0; | |
584 | default: | |
1e3ab99d | 585 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
586 | return 1; |
587 | } | |
588 | case MAINTENANCE_OUT: | |
589 | switch (cdb[1]) { | |
590 | case MO_SET_TARGET_PGS: | |
591 | return 0; | |
592 | default: | |
1e3ab99d | 593 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
594 | return 1; |
595 | } | |
596 | case REQUEST_SENSE: | |
597 | case PERSISTENT_RESERVE_IN: | |
598 | case PERSISTENT_RESERVE_OUT: | |
599 | case READ_BUFFER: | |
600 | case WRITE_BUFFER: | |
601 | return 0; | |
602 | default: | |
1e3ab99d | 603 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
604 | return 1; |
605 | } | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | static inline int core_alua_state_unavailable( | |
611 | struct se_cmd *cmd, | |
1e3ab99d | 612 | unsigned char *cdb) |
c66ac9db NB |
613 | { |
614 | /* | |
615 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
616 | * spc4r17 section 5.9.2.4.5 | |
617 | */ | |
618 | switch (cdb[0]) { | |
619 | case INQUIRY: | |
620 | case REPORT_LUNS: | |
30f359a6 | 621 | return 0; |
c66ac9db | 622 | case MAINTENANCE_IN: |
ba539743 | 623 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
624 | case MI_REPORT_TARGET_PGS: |
625 | return 0; | |
626 | default: | |
1e3ab99d | 627 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
628 | return 1; |
629 | } | |
630 | case MAINTENANCE_OUT: | |
631 | switch (cdb[1]) { | |
632 | case MO_SET_TARGET_PGS: | |
633 | return 0; | |
634 | default: | |
1e3ab99d | 635 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
636 | return 1; |
637 | } | |
638 | case REQUEST_SENSE: | |
639 | case READ_BUFFER: | |
640 | case WRITE_BUFFER: | |
641 | return 0; | |
642 | default: | |
1e3ab99d | 643 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
644 | return 1; |
645 | } | |
646 | ||
647 | return 0; | |
648 | } | |
649 | ||
650 | static inline int core_alua_state_transition( | |
651 | struct se_cmd *cmd, | |
1e3ab99d | 652 | unsigned char *cdb) |
c66ac9db NB |
653 | { |
654 | /* | |
f1ae05d5 | 655 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
656 | * spc4r17 section 5.9.2.5 |
657 | */ | |
658 | switch (cdb[0]) { | |
659 | case INQUIRY: | |
660 | case REPORT_LUNS: | |
30f359a6 | 661 | return 0; |
c66ac9db | 662 | case MAINTENANCE_IN: |
ba539743 | 663 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
664 | case MI_REPORT_TARGET_PGS: |
665 | return 0; | |
666 | default: | |
1e3ab99d | 667 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
668 | return 1; |
669 | } | |
670 | case REQUEST_SENSE: | |
671 | case READ_BUFFER: | |
672 | case WRITE_BUFFER: | |
673 | return 0; | |
674 | default: | |
1e3ab99d | 675 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
676 | return 1; |
677 | } | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
682 | /* | |
f1ae05d5 | 683 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 684 | * return 0: Used to signal success |
f1ae05d5 | 685 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 686 | */ |
de103c93 CH |
687 | sense_reason_t |
688 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 689 | { |
c87fbd56 CH |
690 | struct se_device *dev = cmd->se_dev; |
691 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 692 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
693 | struct se_port *port = lun->lun_sep; |
694 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
695 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
696 | int out_alua_state, nonop_delay_msecs; | |
c87fbd56 CH |
697 | |
698 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
699 | return 0; | |
700 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) | |
701 | return 0; | |
c66ac9db | 702 | |
6708bb27 | 703 | if (!port) |
c66ac9db NB |
704 | return 0; |
705 | /* | |
706 | * First, check for a struct se_port specific secondary ALUA target port | |
707 | * access state: OFFLINE | |
708 | */ | |
709 | if (atomic_read(&port->sep_tg_pt_secondary_offline)) { | |
6708bb27 | 710 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 711 | " target port\n"); |
1e3ab99d PB |
712 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
713 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db NB |
714 | } |
715 | /* | |
716 | * Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the | |
717 | * ALUA target port group, to obtain current ALUA access state. | |
718 | * Otherwise look for the underlying struct se_device association with | |
719 | * a ALUA logical unit group. | |
720 | */ | |
721 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
89c12cc9 NB |
722 | if (!tg_pt_gp_mem) |
723 | return 0; | |
724 | ||
c66ac9db NB |
725 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
726 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
727 | out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
728 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; | |
729 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
730 | /* | |
73f3bf51 | 731 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 732 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
733 | * For the Optimized ALUA access state case, we want to process the |
734 | * incoming fabric cmd ASAP.. | |
735 | */ | |
73f3bf51 | 736 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
737 | return 0; |
738 | ||
739 | switch (out_alua_state) { | |
740 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 741 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 742 | break; |
c66ac9db | 743 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
744 | if (core_alua_state_standby(cmd, cdb)) |
745 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 746 | break; |
c66ac9db | 747 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
748 | if (core_alua_state_unavailable(cmd, cdb)) |
749 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 750 | break; |
c66ac9db | 751 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
752 | if (core_alua_state_transition(cmd, cdb)) |
753 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 754 | break; |
c66094bf | 755 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
756 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
757 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 758 | break; |
c66ac9db NB |
759 | /* |
760 | * OFFLINE is a secondary ALUA target port group access state, that is | |
761 | * handled above with struct se_port->sep_tg_pt_secondary_offline=1 | |
762 | */ | |
763 | case ALUA_ACCESS_STATE_OFFLINE: | |
764 | default: | |
6708bb27 | 765 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 766 | out_alua_state); |
de103c93 | 767 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
768 | } |
769 | ||
de103c93 | 770 | return 0; |
c66ac9db NB |
771 | } |
772 | ||
773 | /* | |
125d0119 | 774 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 775 | */ |
de103c93 | 776 | static sense_reason_t |
bb91c1a0 | 777 | core_alua_check_transition(int state, int valid, int *primary) |
c66ac9db | 778 | { |
bb91c1a0 HR |
779 | /* |
780 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
781 | * defined as primary target port asymmetric access states. | |
782 | */ | |
c66ac9db | 783 | switch (state) { |
73f3bf51 | 784 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
785 | if (!(valid & ALUA_AO_SUP)) |
786 | goto not_supported; | |
787 | *primary = 1; | |
788 | break; | |
c66ac9db | 789 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
790 | if (!(valid & ALUA_AN_SUP)) |
791 | goto not_supported; | |
792 | *primary = 1; | |
793 | break; | |
c66ac9db | 794 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
795 | if (!(valid & ALUA_S_SUP)) |
796 | goto not_supported; | |
797 | *primary = 1; | |
798 | break; | |
c66ac9db | 799 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
800 | if (!(valid & ALUA_U_SUP)) |
801 | goto not_supported; | |
c66ac9db NB |
802 | *primary = 1; |
803 | break; | |
c66094bf HR |
804 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
805 | if (!(valid & ALUA_LBD_SUP)) | |
806 | goto not_supported; | |
807 | *primary = 1; | |
808 | break; | |
c66ac9db NB |
809 | case ALUA_ACCESS_STATE_OFFLINE: |
810 | /* | |
811 | * OFFLINE state is defined as a secondary target port | |
812 | * asymmetric access state. | |
813 | */ | |
bb91c1a0 HR |
814 | if (!(valid & ALUA_O_SUP)) |
815 | goto not_supported; | |
c66ac9db NB |
816 | *primary = 0; |
817 | break; | |
bb91c1a0 HR |
818 | case ALUA_ACCESS_STATE_TRANSITION: |
819 | /* | |
820 | * Transitioning is set internally, and | |
821 | * cannot be selected manually. | |
822 | */ | |
823 | goto not_supported; | |
c66ac9db | 824 | default: |
6708bb27 | 825 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 826 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
827 | } |
828 | ||
829 | return 0; | |
bb91c1a0 HR |
830 | |
831 | not_supported: | |
832 | pr_err("ALUA access state %s not supported", | |
833 | core_alua_dump_state(state)); | |
834 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
835 | } |
836 | ||
837 | static char *core_alua_dump_state(int state) | |
838 | { | |
839 | switch (state) { | |
73f3bf51 | 840 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
841 | return "Active/Optimized"; |
842 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
843 | return "Active/NonOptimized"; | |
c66094bf HR |
844 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
845 | return "LBA Dependent"; | |
c66ac9db NB |
846 | case ALUA_ACCESS_STATE_STANDBY: |
847 | return "Standby"; | |
848 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
849 | return "Unavailable"; | |
850 | case ALUA_ACCESS_STATE_OFFLINE: | |
851 | return "Offline"; | |
bb91c1a0 HR |
852 | case ALUA_ACCESS_STATE_TRANSITION: |
853 | return "Transitioning"; | |
c66ac9db NB |
854 | default: |
855 | return "Unknown"; | |
856 | } | |
857 | ||
858 | return NULL; | |
859 | } | |
860 | ||
861 | char *core_alua_dump_status(int status) | |
862 | { | |
863 | switch (status) { | |
864 | case ALUA_STATUS_NONE: | |
865 | return "None"; | |
125d0119 HR |
866 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
867 | return "Altered by Explicit STPG"; | |
868 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
869 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
870 | default: |
871 | return "Unknown"; | |
872 | } | |
873 | ||
874 | return NULL; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Used by fabric modules to determine when we need to delay processing | |
879 | * for the Active/NonOptimized paths.. | |
880 | */ | |
881 | int core_alua_check_nonop_delay( | |
882 | struct se_cmd *cmd) | |
883 | { | |
884 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
885 | return 0; | |
886 | if (in_interrupt()) | |
887 | return 0; | |
888 | /* | |
889 | * The ALUA Active/NonOptimized access state delay can be disabled | |
890 | * in via configfs with a value of zero | |
891 | */ | |
6708bb27 | 892 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
893 | return 0; |
894 | /* | |
895 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
896 | * defined interval in core_alua_state_nonoptimized() | |
897 | */ | |
898 | msleep_interruptible(cmd->alua_nonop_delay); | |
899 | return 0; | |
900 | } | |
901 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
902 | ||
903 | /* | |
904 | * Called with tg_pt_gp->tg_pt_gp_md_mutex or tg_pt_gp_mem->sep_tg_pt_md_mutex | |
905 | * | |
906 | */ | |
907 | static int core_alua_write_tpg_metadata( | |
908 | const char *path, | |
909 | unsigned char *md_buf, | |
910 | u32 md_buf_len) | |
911 | { | |
0e9b10a9 AV |
912 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
913 | int ret; | |
c66ac9db | 914 | |
0e9b10a9 AV |
915 | if (IS_ERR(file)) { |
916 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
917 | return -ENODEV; |
918 | } | |
0e9b10a9 AV |
919 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
920 | if (ret < 0) | |
6708bb27 | 921 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 922 | fput(file); |
f730f915 | 923 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
924 | } |
925 | ||
926 | /* | |
927 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held | |
928 | */ | |
929 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 930 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 931 | { |
1e0b9403 | 932 | unsigned char *md_buf; |
0fd97ccf | 933 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
c66ac9db | 934 | char path[ALUA_METADATA_PATH_LEN]; |
1e0b9403 HR |
935 | int len, rc; |
936 | ||
937 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
938 | if (!md_buf) { | |
939 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
940 | return -ENOMEM; | |
941 | } | |
c66ac9db NB |
942 | |
943 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
944 | ||
1e0b9403 | 945 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
946 | "tg_pt_gp_id=%hu\n" |
947 | "alua_access_state=0x%02x\n" | |
948 | "alua_access_status=0x%02x\n", | |
9c6e164c HR |
949 | tg_pt_gp->tg_pt_gp_id, |
950 | tg_pt_gp->tg_pt_gp_alua_pending_state, | |
c66ac9db NB |
951 | tg_pt_gp->tg_pt_gp_alua_access_status); |
952 | ||
953 | snprintf(path, ALUA_METADATA_PATH_LEN, | |
954 | "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0], | |
955 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); | |
956 | ||
1e0b9403 HR |
957 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
958 | kfree(md_buf); | |
959 | return rc; | |
c66ac9db NB |
960 | } |
961 | ||
9c6e164c | 962 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) |
c66ac9db | 963 | { |
9c6e164c HR |
964 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, |
965 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work); | |
966 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
c66ac9db NB |
967 | struct se_dev_entry *se_deve; |
968 | struct se_lun_acl *lacl; | |
969 | struct se_port *port; | |
970 | struct t10_alua_tg_pt_gp_member *mem; | |
9c6e164c HR |
971 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == |
972 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
c66ac9db NB |
973 | |
974 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
975 | list_for_each_entry(mem, &tg_pt_gp->tg_pt_gp_mem_list, | |
976 | tg_pt_gp_mem_list) { | |
977 | port = mem->tg_pt; | |
978 | /* | |
979 | * After an implicit target port asymmetric access state | |
980 | * change, a device server shall establish a unit attention | |
981 | * condition for the initiator port associated with every I_T | |
982 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 983 | * ACCESS STATE CHANGED. |
c66ac9db NB |
984 | * |
985 | * After an explicit target port asymmetric access state | |
986 | * change, a device server shall establish a unit attention | |
987 | * condition with the additional sense code set to ASYMMETRIC | |
988 | * ACCESS STATE CHANGED for the initiator port associated with | |
989 | * every I_T nexus other than the I_T nexus on which the SET | |
990 | * TARGET PORT GROUPS command | |
991 | */ | |
992 | atomic_inc(&mem->tg_pt_gp_mem_ref_cnt); | |
993 | smp_mb__after_atomic_inc(); | |
994 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
995 | ||
996 | spin_lock_bh(&port->sep_alua_lock); | |
997 | list_for_each_entry(se_deve, &port->sep_alua_list, | |
998 | alua_port_list) { | |
999 | lacl = se_deve->se_lun_acl; | |
1000 | /* | |
1001 | * se_deve->se_lun_acl pointer may be NULL for a | |
125d0119 | 1002 | * entry created without explicit Node+MappedLUN ACLs |
c66ac9db | 1003 | */ |
6708bb27 | 1004 | if (!lacl) |
c66ac9db NB |
1005 | continue; |
1006 | ||
9c6e164c HR |
1007 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
1008 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
1009 | (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
1010 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl) && | |
1011 | (tg_pt_gp->tg_pt_gp_alua_port != NULL) && | |
1012 | (tg_pt_gp->tg_pt_gp_alua_port == port)) | |
c66ac9db NB |
1013 | continue; |
1014 | ||
1015 | core_scsi3_ua_allocate(lacl->se_lun_nacl, | |
1016 | se_deve->mapped_lun, 0x2A, | |
1017 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); | |
1018 | } | |
1019 | spin_unlock_bh(&port->sep_alua_lock); | |
1020 | ||
1021 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1022 | atomic_dec(&mem->tg_pt_gp_mem_ref_cnt); | |
1023 | smp_mb__after_atomic_dec(); | |
1024 | } | |
1025 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1026 | /* | |
1027 | * Update the ALUA metadata buf that has been allocated in | |
1028 | * core_alua_do_port_transition(), this metadata will be written | |
1029 | * to struct file. | |
1030 | * | |
1031 | * Note that there is the case where we do not want to update the | |
1032 | * metadata when the saved metadata is being parsed in userspace | |
1033 | * when setting the existing port access state and access status. | |
1034 | * | |
1035 | * Also note that the failure to write out the ALUA metadata to | |
1036 | * struct file does NOT affect the actual ALUA transition. | |
1037 | */ | |
1038 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1039 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1040 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1041 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1042 | } | |
1043 | /* | |
1044 | * Set the current primary ALUA access state to the requested new state | |
1045 | */ | |
dfbce75a HR |
1046 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1047 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1048 | |
6708bb27 | 1049 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1050 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1051 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1052 | tg_pt_gp->tg_pt_gp_id, |
1053 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1054 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
9c6e164c HR |
1055 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1056 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
1057 | smp_mb__after_atomic_dec(); | |
1058 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1059 | ||
1060 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1061 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1062 | } | |
1063 | ||
1064 | static int core_alua_do_transition_tg_pt( | |
1065 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1066 | int new_state, | |
1067 | int explicit) | |
1068 | { | |
1069 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1070 | DECLARE_COMPLETION_ONSTACK(wait); | |
1071 | ||
1072 | /* Nothing to be done here */ | |
1073 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1074 | return 0; | |
1075 | ||
1076 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) | |
1077 | return -EAGAIN; | |
1078 | ||
1079 | /* | |
1080 | * Flush any pending transitions | |
1081 | */ | |
1082 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs && | |
1083 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == | |
1084 | ALUA_ACCESS_STATE_TRANSITION) { | |
1085 | /* Just in case */ | |
1086 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1087 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1088 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); | |
1089 | wait_for_completion(&wait); | |
1090 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Save the old primary ALUA access state, and set the current state | |
1096 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1097 | */ | |
1098 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1099 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1100 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1101 | ||
1102 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, | |
1103 | ALUA_ACCESS_STATE_TRANSITION); | |
1104 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1105 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1106 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1107 | ||
1108 | /* | |
1109 | * Check for the optional ALUA primary state transition delay | |
1110 | */ | |
1111 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1112 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1113 | ||
1114 | /* | |
1115 | * Take a reference for workqueue item | |
1116 | */ | |
1117 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1118 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
1119 | smp_mb__after_atomic_inc(); | |
1120 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1121 | ||
1122 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) { | |
1123 | unsigned long transition_tmo; | |
1124 | ||
1125 | transition_tmo = tg_pt_gp->tg_pt_gp_implicit_trans_secs * HZ; | |
1126 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1127 | &tg_pt_gp->tg_pt_gp_transition_work, | |
1128 | transition_tmo); | |
1129 | } else { | |
1130 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1131 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1132 | &tg_pt_gp->tg_pt_gp_transition_work, 0); | |
1133 | wait_for_completion(&wait); | |
1134 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1135 | } | |
c66ac9db NB |
1136 | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | int core_alua_do_port_transition( | |
1141 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1142 | struct se_device *l_dev, | |
1143 | struct se_port *l_port, | |
1144 | struct se_node_acl *l_nacl, | |
1145 | int new_state, | |
125d0119 | 1146 | int explicit) |
c66ac9db NB |
1147 | { |
1148 | struct se_device *dev; | |
c66ac9db NB |
1149 | struct t10_alua_lu_gp *lu_gp; |
1150 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1151 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1152 | int primary, valid_states, rc = 0; |
c66ac9db | 1153 | |
bb91c1a0 HR |
1154 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1155 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) | |
c66ac9db NB |
1156 | return -EINVAL; |
1157 | ||
c66ac9db NB |
1158 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1159 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1160 | lu_gp = local_lu_gp_mem->lu_gp; | |
1161 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
1162 | smp_mb__after_atomic_inc(); | |
1163 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1164 | /* | |
1165 | * For storage objects that are members of the 'default_lu_gp', | |
1166 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1167 | * on all of the matching target port groups IDs in default_lu_gp. | |
1168 | */ | |
6708bb27 | 1169 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1170 | /* |
1171 | * core_alua_do_transition_tg_pt() will always return | |
1172 | * success. | |
1173 | */ | |
9c6e164c HR |
1174 | l_tg_pt_gp->tg_pt_gp_alua_port = l_port; |
1175 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; | |
1176 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1177 | new_state, explicit); | |
c66ac9db NB |
1178 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
1179 | smp_mb__after_atomic_dec(); | |
9c6e164c | 1180 | return rc; |
c66ac9db NB |
1181 | } |
1182 | /* | |
1183 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1184 | * the associated storage objects looking for a matching target port | |
1185 | * group ID from the local target port group. | |
1186 | */ | |
1187 | spin_lock(&lu_gp->lu_gp_lock); | |
1188 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1189 | lu_gp_mem_list) { | |
1190 | ||
1191 | dev = lu_gp_mem->lu_gp_mem_dev; | |
c66ac9db NB |
1192 | atomic_inc(&lu_gp_mem->lu_gp_mem_ref_cnt); |
1193 | smp_mb__after_atomic_inc(); | |
1194 | spin_unlock(&lu_gp->lu_gp_lock); | |
1195 | ||
0fd97ccf | 1196 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1197 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1198 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1199 | tg_pt_gp_list) { |
1200 | ||
6708bb27 | 1201 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1202 | continue; |
1203 | /* | |
1204 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1205 | * is changed for any target port group accessible via |
c66ac9db NB |
1206 | * a logical unit within a LU group, the target port |
1207 | * behavior group asymmetric access states for the same | |
1208 | * target port group accessible via other logical units | |
1209 | * in that LU group will also change. | |
1210 | */ | |
1211 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1212 | continue; | |
1213 | ||
1214 | if (l_tg_pt_gp == tg_pt_gp) { | |
9c6e164c HR |
1215 | tg_pt_gp->tg_pt_gp_alua_port = l_port; |
1216 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; | |
c66ac9db | 1217 | } else { |
9c6e164c HR |
1218 | tg_pt_gp->tg_pt_gp_alua_port = NULL; |
1219 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; | |
c66ac9db NB |
1220 | } |
1221 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
1222 | smp_mb__after_atomic_inc(); | |
0fd97ccf | 1223 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1224 | /* |
1225 | * core_alua_do_transition_tg_pt() will always return | |
1226 | * success. | |
1227 | */ | |
9c6e164c HR |
1228 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1229 | new_state, explicit); | |
c66ac9db | 1230 | |
0fd97ccf | 1231 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1232 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
1233 | smp_mb__after_atomic_dec(); | |
9c6e164c HR |
1234 | if (rc) |
1235 | break; | |
c66ac9db | 1236 | } |
0fd97ccf | 1237 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1238 | |
1239 | spin_lock(&lu_gp->lu_gp_lock); | |
1240 | atomic_dec(&lu_gp_mem->lu_gp_mem_ref_cnt); | |
1241 | smp_mb__after_atomic_dec(); | |
1242 | } | |
1243 | spin_unlock(&lu_gp->lu_gp_lock); | |
1244 | ||
9c6e164c HR |
1245 | if (!rc) { |
1246 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1247 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1248 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1249 | l_tg_pt_gp->tg_pt_gp_id, | |
1250 | (explicit) ? "explicit" : "implicit", | |
1251 | core_alua_dump_state(new_state)); | |
1252 | } | |
c66ac9db NB |
1253 | |
1254 | atomic_dec(&lu_gp->lu_gp_ref_cnt); | |
1255 | smp_mb__after_atomic_dec(); | |
9c6e164c | 1256 | return rc; |
c66ac9db NB |
1257 | } |
1258 | ||
1259 | /* | |
1260 | * Called with tg_pt_gp_mem->sep_tg_pt_md_mutex held | |
1261 | */ | |
1262 | static int core_alua_update_tpg_secondary_metadata( | |
1263 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1e0b9403 | 1264 | struct se_port *port) |
c66ac9db | 1265 | { |
1e0b9403 | 1266 | unsigned char *md_buf; |
c66ac9db NB |
1267 | struct se_portal_group *se_tpg = port->sep_tpg; |
1268 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; | |
1e0b9403 HR |
1269 | int len, rc; |
1270 | ||
1271 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
1272 | if (!md_buf) { | |
1273 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
1274 | return -ENOMEM; | |
1275 | } | |
c66ac9db NB |
1276 | |
1277 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1278 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1279 | ||
1280 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1281 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1282 | |
e3d6f909 | 1283 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1284 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1285 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1286 | |
1e0b9403 | 1287 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db NB |
1288 | "alua_tg_pt_status=0x%02x\n", |
1289 | atomic_read(&port->sep_tg_pt_secondary_offline), | |
1290 | port->sep_tg_pt_secondary_stat); | |
1291 | ||
1292 | snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%u", | |
e3d6f909 | 1293 | se_tpg->se_tpg_tfo->get_fabric_name(), wwn, |
c66ac9db NB |
1294 | port->sep_lun->unpacked_lun); |
1295 | ||
1e0b9403 HR |
1296 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1297 | kfree(md_buf); | |
1298 | ||
1299 | return rc; | |
c66ac9db NB |
1300 | } |
1301 | ||
1302 | static int core_alua_set_tg_pt_secondary_state( | |
1303 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1304 | struct se_port *port, | |
125d0119 | 1305 | int explicit, |
c66ac9db NB |
1306 | int offline) |
1307 | { | |
1308 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1309 | int trans_delay_msecs; |
1310 | ||
1311 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1312 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 1313 | if (!tg_pt_gp) { |
c66ac9db | 1314 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
6708bb27 | 1315 | pr_err("Unable to complete secondary state" |
c66ac9db | 1316 | " transition\n"); |
e3d6f909 | 1317 | return -EINVAL; |
c66ac9db NB |
1318 | } |
1319 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1320 | /* | |
1321 | * Set the secondary ALUA target port access state to OFFLINE | |
1322 | * or release the previously secondary state for struct se_port | |
1323 | */ | |
1324 | if (offline) | |
1325 | atomic_set(&port->sep_tg_pt_secondary_offline, 1); | |
1326 | else | |
1327 | atomic_set(&port->sep_tg_pt_secondary_offline, 0); | |
1328 | ||
125d0119 HR |
1329 | port->sep_tg_pt_secondary_stat = (explicit) ? |
1330 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1331 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1332 | |
6708bb27 | 1333 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1334 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1335 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1336 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1337 | ||
1338 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1339 | /* | |
1340 | * Do the optional transition delay after we set the secondary | |
1341 | * ALUA access state. | |
1342 | */ | |
1343 | if (trans_delay_msecs != 0) | |
1344 | msleep_interruptible(trans_delay_msecs); | |
1345 | /* | |
1346 | * See if we need to update the ALUA fabric port metadata for | |
1347 | * secondary state and status | |
1348 | */ | |
1349 | if (port->sep_tg_pt_secondary_write_md) { | |
c66ac9db | 1350 | mutex_lock(&port->sep_tg_pt_md_mutex); |
1e0b9403 | 1351 | core_alua_update_tpg_secondary_metadata(tg_pt_gp_mem, port); |
c66ac9db | 1352 | mutex_unlock(&port->sep_tg_pt_md_mutex); |
c66ac9db NB |
1353 | } |
1354 | ||
1355 | return 0; | |
1356 | } | |
1357 | ||
229d4f11 HR |
1358 | struct t10_alua_lba_map * |
1359 | core_alua_allocate_lba_map(struct list_head *list, | |
1360 | u64 first_lba, u64 last_lba) | |
1361 | { | |
1362 | struct t10_alua_lba_map *lba_map; | |
1363 | ||
1364 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1365 | if (!lba_map) { | |
1366 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1367 | return ERR_PTR(-ENOMEM); | |
1368 | } | |
1369 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1370 | lba_map->lba_map_first_lba = first_lba; | |
1371 | lba_map->lba_map_last_lba = last_lba; | |
1372 | ||
1373 | list_add_tail(&lba_map->lba_map_list, list); | |
1374 | return lba_map; | |
1375 | } | |
1376 | ||
1377 | int | |
1378 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1379 | int pg_id, int state) | |
1380 | { | |
1381 | struct t10_alua_lba_map_member *lba_map_mem; | |
1382 | ||
1383 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1384 | lba_map_mem_list) { | |
1385 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1386 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1387 | return -EINVAL; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1392 | if (!lba_map_mem) { | |
1393 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1394 | return -ENOMEM; | |
1395 | } | |
1396 | lba_map_mem->lba_map_mem_alua_state = state; | |
1397 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1398 | ||
1399 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1400 | &lba_map->lba_map_mem_list); | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | void | |
1405 | core_alua_free_lba_map(struct list_head *lba_list) | |
1406 | { | |
1407 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1408 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1409 | ||
1410 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1411 | lba_map_list) { | |
1412 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1413 | &lba_map->lba_map_mem_list, | |
1414 | lba_map_mem_list) { | |
1415 | list_del(&lba_map_mem->lba_map_mem_list); | |
1416 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1417 | lba_map_mem); | |
1418 | } | |
1419 | list_del(&lba_map->lba_map_list); | |
1420 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | void | |
1425 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1426 | int segment_size, int segment_mult) | |
1427 | { | |
1428 | struct list_head old_lba_map_list; | |
1429 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1430 | int activate = 0, supported; | |
1431 | ||
1432 | INIT_LIST_HEAD(&old_lba_map_list); | |
1433 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1434 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1435 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1436 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1437 | if (lba_map_list) { | |
1438 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1439 | activate = 1; | |
1440 | } | |
1441 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1442 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1443 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1444 | tg_pt_gp_list) { | |
1445 | ||
1446 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1447 | continue; | |
1448 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1449 | if (activate) | |
1450 | supported |= ALUA_LBD_SUP; | |
1451 | else | |
1452 | supported &= ~ALUA_LBD_SUP; | |
1453 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1454 | } | |
1455 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1456 | core_alua_free_lba_map(&old_lba_map_list); | |
1457 | } | |
1458 | ||
c66ac9db NB |
1459 | struct t10_alua_lu_gp * |
1460 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1461 | { | |
1462 | struct t10_alua_lu_gp *lu_gp; | |
1463 | ||
1464 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1465 | if (!lu_gp) { |
1466 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1467 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1468 | } |
e3d6f909 | 1469 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1470 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1471 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1472 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1473 | ||
1474 | if (def_group) { | |
e3d6f909 | 1475 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1476 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1477 | alua_lu_gps_count++; |
c66ac9db NB |
1478 | } |
1479 | ||
1480 | return lu_gp; | |
1481 | } | |
1482 | ||
1483 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1484 | { | |
1485 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1486 | u16 lu_gp_id_tmp; | |
1487 | /* | |
1488 | * The lu_gp->lu_gp_id may only be set once.. | |
1489 | */ | |
1490 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1491 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1492 | " ignoring request\n"); |
e3d6f909 | 1493 | return -EINVAL; |
c66ac9db NB |
1494 | } |
1495 | ||
e3d6f909 AG |
1496 | spin_lock(&lu_gps_lock); |
1497 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1498 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1499 | " 0x0000ffff reached\n"); |
e3d6f909 | 1500 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1501 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1502 | return -ENOSPC; |
c66ac9db NB |
1503 | } |
1504 | again: | |
1505 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1506 | alua_lu_gps_counter++; |
c66ac9db | 1507 | |
e3d6f909 | 1508 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1509 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1510 | if (!lu_gp_id) |
c66ac9db NB |
1511 | goto again; |
1512 | ||
6708bb27 | 1513 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1514 | " already exists, ignoring request\n", |
1515 | lu_gp_id); | |
e3d6f909 AG |
1516 | spin_unlock(&lu_gps_lock); |
1517 | return -EINVAL; | |
c66ac9db NB |
1518 | } |
1519 | } | |
1520 | ||
1521 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1522 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1523 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1524 | alua_lu_gps_count++; | |
1525 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1526 | |
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | static struct t10_alua_lu_gp_member * | |
1531 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1532 | { | |
1533 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1534 | ||
1535 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1536 | if (!lu_gp_mem) { |
1537 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1538 | return ERR_PTR(-ENOMEM); |
1539 | } | |
1540 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1541 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1542 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1543 | ||
1544 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1545 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1546 | ||
1547 | return lu_gp_mem; | |
1548 | } | |
1549 | ||
1550 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1551 | { | |
1552 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1553 | /* | |
1554 | * Once we have reached this point, config_item_put() has | |
1555 | * already been called from target_core_alua_drop_lu_gp(). | |
1556 | * | |
1557 | * Here, we remove the *lu_gp from the global list so that | |
1558 | * no associations can be made while we are releasing | |
1559 | * struct t10_alua_lu_gp. | |
1560 | */ | |
e3d6f909 | 1561 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1562 | list_del(&lu_gp->lu_gp_node); |
1563 | alua_lu_gps_count--; | |
1564 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1565 | /* |
1566 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1567 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1568 | * released with core_alua_put_lu_gp_from_name() | |
1569 | */ | |
1570 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1571 | cpu_relax(); | |
1572 | /* | |
1573 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1574 | * struct se_device. | |
1575 | */ | |
1576 | spin_lock(&lu_gp->lu_gp_lock); | |
1577 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1578 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1579 | if (lu_gp_mem->lu_gp_assoc) { | |
1580 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1581 | lu_gp->lu_gp_members--; | |
1582 | lu_gp_mem->lu_gp_assoc = 0; | |
1583 | } | |
1584 | spin_unlock(&lu_gp->lu_gp_lock); | |
1585 | /* | |
1586 | * | |
25985edc | 1587 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1588 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1589 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1590 | * | |
1591 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1592 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1593 | */ |
1594 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1595 | if (lu_gp != default_lu_gp) |
c66ac9db | 1596 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1597 | default_lu_gp); |
c66ac9db NB |
1598 | else |
1599 | lu_gp_mem->lu_gp = NULL; | |
1600 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1601 | ||
1602 | spin_lock(&lu_gp->lu_gp_lock); | |
1603 | } | |
1604 | spin_unlock(&lu_gp->lu_gp_lock); | |
1605 | ||
1606 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1607 | } | |
1608 | ||
1609 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1610 | { | |
c66ac9db NB |
1611 | struct t10_alua_lu_gp *lu_gp; |
1612 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1613 | ||
c66ac9db | 1614 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1615 | if (!lu_gp_mem) |
c66ac9db NB |
1616 | return; |
1617 | ||
1618 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1619 | cpu_relax(); | |
1620 | ||
1621 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1622 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1623 | if (lu_gp) { |
c66ac9db NB |
1624 | spin_lock(&lu_gp->lu_gp_lock); |
1625 | if (lu_gp_mem->lu_gp_assoc) { | |
1626 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1627 | lu_gp->lu_gp_members--; | |
1628 | lu_gp_mem->lu_gp_assoc = 0; | |
1629 | } | |
1630 | spin_unlock(&lu_gp->lu_gp_lock); | |
1631 | lu_gp_mem->lu_gp = NULL; | |
1632 | } | |
1633 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1634 | ||
1635 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1636 | } | |
1637 | ||
1638 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1639 | { | |
1640 | struct t10_alua_lu_gp *lu_gp; | |
1641 | struct config_item *ci; | |
1642 | ||
e3d6f909 AG |
1643 | spin_lock(&lu_gps_lock); |
1644 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1645 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1646 | continue; |
1647 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1648 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1649 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1650 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1651 | return lu_gp; |
1652 | } | |
1653 | } | |
e3d6f909 | 1654 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1655 | |
1656 | return NULL; | |
1657 | } | |
1658 | ||
1659 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1660 | { | |
e3d6f909 | 1661 | spin_lock(&lu_gps_lock); |
c66ac9db | 1662 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1663 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1664 | } |
1665 | ||
1666 | /* | |
1667 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1668 | */ | |
1669 | void __core_alua_attach_lu_gp_mem( | |
1670 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1671 | struct t10_alua_lu_gp *lu_gp) | |
1672 | { | |
1673 | spin_lock(&lu_gp->lu_gp_lock); | |
1674 | lu_gp_mem->lu_gp = lu_gp; | |
1675 | lu_gp_mem->lu_gp_assoc = 1; | |
1676 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1677 | lu_gp->lu_gp_members++; | |
1678 | spin_unlock(&lu_gp->lu_gp_lock); | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1683 | */ | |
1684 | void __core_alua_drop_lu_gp_mem( | |
1685 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1686 | struct t10_alua_lu_gp *lu_gp) | |
1687 | { | |
1688 | spin_lock(&lu_gp->lu_gp_lock); | |
1689 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1690 | lu_gp_mem->lu_gp = NULL; | |
1691 | lu_gp_mem->lu_gp_assoc = 0; | |
1692 | lu_gp->lu_gp_members--; | |
1693 | spin_unlock(&lu_gp->lu_gp_lock); | |
1694 | } | |
1695 | ||
0fd97ccf CH |
1696 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1697 | const char *name, int def_group) | |
c66ac9db NB |
1698 | { |
1699 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1700 | ||
1701 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1702 | if (!tg_pt_gp) { |
1703 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1704 | return NULL; |
1705 | } | |
1706 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
1707 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_mem_list); | |
1708 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); | |
1709 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1710 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
9c6e164c HR |
1711 | INIT_DELAYED_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1712 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1713 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1714 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1715 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1716 | /* |
125d0119 | 1717 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1718 | */ |
1719 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1720 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1721 | /* |
1722 | * Set the default Active/NonOptimized Delay in milliseconds | |
1723 | */ | |
1724 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1725 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1726 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1727 | |
c0dc941e HR |
1728 | /* |
1729 | * Enable all supported states | |
1730 | */ | |
1731 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1732 | ALUA_T_SUP | ALUA_O_SUP | | |
1733 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1734 | ||
c66ac9db | 1735 | if (def_group) { |
0fd97ccf | 1736 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1737 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1738 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1739 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1740 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1741 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1742 | &dev->t10_alua.tg_pt_gps_list); |
1743 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1744 | } |
1745 | ||
1746 | return tg_pt_gp; | |
1747 | } | |
1748 | ||
1749 | int core_alua_set_tg_pt_gp_id( | |
1750 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1751 | u16 tg_pt_gp_id) | |
1752 | { | |
0fd97ccf | 1753 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1754 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1755 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1756 | |
c66ac9db NB |
1757 | /* |
1758 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1759 | */ | |
1760 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1761 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1762 | " ignoring request\n"); |
e3d6f909 | 1763 | return -EINVAL; |
c66ac9db NB |
1764 | } |
1765 | ||
0fd97ccf CH |
1766 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1767 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1768 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1769 | " 0x0000ffff reached\n"); |
0fd97ccf | 1770 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1771 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1772 | return -ENOSPC; |
c66ac9db NB |
1773 | } |
1774 | again: | |
1775 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1776 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1777 | |
0fd97ccf | 1778 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1779 | tg_pt_gp_list) { |
1780 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1781 | if (!tg_pt_gp_id) |
c66ac9db NB |
1782 | goto again; |
1783 | ||
6708bb27 | 1784 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1785 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1786 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1787 | return -EINVAL; |
c66ac9db NB |
1788 | } |
1789 | } | |
1790 | ||
1791 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1792 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1793 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1794 | &dev->t10_alua.tg_pt_gps_list); |
1795 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1796 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1797 | |
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem( | |
1802 | struct se_port *port) | |
1803 | { | |
1804 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
1805 | ||
1806 | tg_pt_gp_mem = kmem_cache_zalloc(t10_alua_tg_pt_gp_mem_cache, | |
1807 | GFP_KERNEL); | |
6708bb27 AG |
1808 | if (!tg_pt_gp_mem) { |
1809 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp_member\n"); | |
c66ac9db NB |
1810 | return ERR_PTR(-ENOMEM); |
1811 | } | |
1812 | INIT_LIST_HEAD(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1813 | spin_lock_init(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1814 | atomic_set(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt, 0); | |
1815 | ||
1816 | tg_pt_gp_mem->tg_pt = port; | |
1817 | port->sep_alua_tg_pt_gp_mem = tg_pt_gp_mem; | |
c66ac9db NB |
1818 | |
1819 | return tg_pt_gp_mem; | |
1820 | } | |
1821 | ||
1822 | void core_alua_free_tg_pt_gp( | |
1823 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1824 | { | |
0fd97ccf | 1825 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1826 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp; |
0fd97ccf | 1827 | |
c66ac9db NB |
1828 | /* |
1829 | * Once we have reached this point, config_item_put() has already | |
1830 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1831 | * | |
1832 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1833 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1834 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1835 | */ | |
0fd97ccf | 1836 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1837 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1838 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1839 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1840 | ||
9c6e164c HR |
1841 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1842 | ||
c66ac9db NB |
1843 | /* |
1844 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1845 | * core_alua_get_tg_pt_gp_by_name() in | |
1846 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1847 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1848 | */ | |
1849 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1850 | cpu_relax(); | |
0fd97ccf | 1851 | |
c66ac9db NB |
1852 | /* |
1853 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1854 | * struct se_port. | |
1855 | */ | |
1856 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1857 | list_for_each_entry_safe(tg_pt_gp_mem, tg_pt_gp_mem_tmp, | |
1858 | &tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) { | |
1859 | if (tg_pt_gp_mem->tg_pt_gp_assoc) { | |
1860 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1861 | tg_pt_gp->tg_pt_gp_members--; | |
1862 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; | |
1863 | } | |
1864 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1865 | /* | |
25985edc | 1866 | * tg_pt_gp_mem is associated with a single |
c66ac9db NB |
1867 | * se_port->sep_alua_tg_pt_gp_mem, and is released via |
1868 | * core_alua_free_tg_pt_gp_mem(). | |
1869 | * | |
1870 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, | |
f1ae05d5 | 1871 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1872 | * default_tg_pt_gp. |
1873 | */ | |
1874 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
0fd97ccf | 1875 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
c66ac9db | 1876 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, |
0fd97ccf | 1877 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db NB |
1878 | } else |
1879 | tg_pt_gp_mem->tg_pt_gp = NULL; | |
1880 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1881 | ||
1882 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1883 | } | |
1884 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1885 | ||
1886 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1887 | } | |
1888 | ||
1889 | void core_alua_free_tg_pt_gp_mem(struct se_port *port) | |
1890 | { | |
c66ac9db NB |
1891 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
1892 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
1893 | ||
c66ac9db | 1894 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
6708bb27 | 1895 | if (!tg_pt_gp_mem) |
c66ac9db NB |
1896 | return; |
1897 | ||
1898 | while (atomic_read(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt)) | |
1899 | cpu_relax(); | |
1900 | ||
1901 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1902 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 1903 | if (tg_pt_gp) { |
c66ac9db NB |
1904 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
1905 | if (tg_pt_gp_mem->tg_pt_gp_assoc) { | |
1906 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1907 | tg_pt_gp->tg_pt_gp_members--; | |
1908 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; | |
1909 | } | |
1910 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1911 | tg_pt_gp_mem->tg_pt_gp = NULL; | |
1912 | } | |
1913 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1914 | ||
1915 | kmem_cache_free(t10_alua_tg_pt_gp_mem_cache, tg_pt_gp_mem); | |
1916 | } | |
1917 | ||
1918 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( | |
0fd97ccf | 1919 | struct se_device *dev, const char *name) |
c66ac9db NB |
1920 | { |
1921 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1922 | struct config_item *ci; | |
1923 | ||
0fd97ccf CH |
1924 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1925 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1926 | tg_pt_gp_list) { |
6708bb27 | 1927 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1928 | continue; |
1929 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1930 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1931 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1932 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1933 | return tg_pt_gp; |
1934 | } | |
1935 | } | |
0fd97ccf | 1936 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1937 | |
1938 | return NULL; | |
1939 | } | |
1940 | ||
1941 | static void core_alua_put_tg_pt_gp_from_name( | |
1942 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1943 | { | |
0fd97ccf | 1944 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1945 | |
0fd97ccf | 1946 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1947 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1948 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1949 | } |
1950 | ||
1951 | /* | |
1952 | * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held | |
1953 | */ | |
1954 | void __core_alua_attach_tg_pt_gp_mem( | |
1955 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1956 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1957 | { | |
1958 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1959 | tg_pt_gp_mem->tg_pt_gp = tg_pt_gp; | |
1960 | tg_pt_gp_mem->tg_pt_gp_assoc = 1; | |
1961 | list_add_tail(&tg_pt_gp_mem->tg_pt_gp_mem_list, | |
1962 | &tg_pt_gp->tg_pt_gp_mem_list); | |
1963 | tg_pt_gp->tg_pt_gp_members++; | |
1964 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1965 | } | |
1966 | ||
1967 | /* | |
1968 | * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held | |
1969 | */ | |
1970 | static void __core_alua_drop_tg_pt_gp_mem( | |
1971 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1972 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1973 | { | |
1974 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1975 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1976 | tg_pt_gp_mem->tg_pt_gp = NULL; | |
1977 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; | |
1978 | tg_pt_gp->tg_pt_gp_members--; | |
1979 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1980 | } | |
1981 | ||
1982 | ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page) | |
1983 | { | |
c66ac9db | 1984 | struct config_item *tg_pt_ci; |
c66ac9db NB |
1985 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
1986 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
1987 | ssize_t len = 0; | |
1988 | ||
c66ac9db | 1989 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
6708bb27 | 1990 | if (!tg_pt_gp_mem) |
c66ac9db NB |
1991 | return len; |
1992 | ||
1993 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1994 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 1995 | if (tg_pt_gp) { |
c66ac9db NB |
1996 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1997 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1998 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1999 | "Primary Access Status: %s\nTG Port Secondary Access" | |
2000 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
2001 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
2002 | core_alua_dump_state(atomic_read( | |
2003 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
2004 | core_alua_dump_status( | |
2005 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
2006 | (atomic_read(&port->sep_tg_pt_secondary_offline)) ? | |
2007 | "Offline" : "None", | |
2008 | core_alua_dump_status(port->sep_tg_pt_secondary_stat)); | |
2009 | } | |
2010 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
2011 | ||
2012 | return len; | |
2013 | } | |
2014 | ||
2015 | ssize_t core_alua_store_tg_pt_gp_info( | |
2016 | struct se_port *port, | |
2017 | const char *page, | |
2018 | size_t count) | |
2019 | { | |
2020 | struct se_portal_group *tpg; | |
2021 | struct se_lun *lun; | |
0fd97ccf | 2022 | struct se_device *dev = port->sep_lun->lun_se_dev; |
c66ac9db NB |
2023 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
2024 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
2025 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; | |
2026 | int move = 0; | |
2027 | ||
2028 | tpg = port->sep_tpg; | |
2029 | lun = port->sep_lun; | |
2030 | ||
c87fbd56 CH |
2031 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
2032 | if (!tg_pt_gp_mem) | |
2033 | return 0; | |
c66ac9db NB |
2034 | |
2035 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 2036 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
2037 | return -EINVAL; |
2038 | } | |
2039 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
2040 | memcpy(buf, page, count); | |
2041 | /* | |
2042 | * Any ALUA target port group alias besides "NULL" means we will be | |
2043 | * making a new group association. | |
2044 | */ | |
2045 | if (strcmp(strstrip(buf), "NULL")) { | |
2046 | /* | |
2047 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
2048 | * struct t10_alua_tg_pt_gp. This reference is released with | |
2049 | * core_alua_put_tg_pt_gp_from_name() below. | |
2050 | */ | |
0fd97ccf | 2051 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 2052 | strstrip(buf)); |
6708bb27 | 2053 | if (!tg_pt_gp_new) |
c66ac9db NB |
2054 | return -ENODEV; |
2055 | } | |
c66ac9db NB |
2056 | |
2057 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
2058 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 2059 | if (tg_pt_gp) { |
c66ac9db NB |
2060 | /* |
2061 | * Clearing an existing tg_pt_gp association, and replacing | |
2062 | * with the default_tg_pt_gp. | |
2063 | */ | |
6708bb27 AG |
2064 | if (!tg_pt_gp_new) { |
2065 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
2066 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
2067 | " alua/%s, ID: %hu back to" | |
2068 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
2069 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2070 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2071 | config_item_name(&lun->lun_group.cg_item), |
2072 | config_item_name( | |
2073 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
2074 | tg_pt_gp->tg_pt_gp_id); | |
2075 | ||
2076 | __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp); | |
2077 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, | |
0fd97ccf | 2078 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db NB |
2079 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
2080 | ||
2081 | return count; | |
2082 | } | |
2083 | /* | |
2084 | * Removing existing association of tg_pt_gp_mem with tg_pt_gp | |
2085 | */ | |
2086 | __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp); | |
2087 | move = 1; | |
2088 | } | |
2089 | /* | |
2090 | * Associate tg_pt_gp_mem with tg_pt_gp_new. | |
2091 | */ | |
2092 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp_new); | |
2093 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
6708bb27 | 2094 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2095 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2096 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2097 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2098 | config_item_name(&lun->lun_group.cg_item), |
2099 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2100 | tg_pt_gp_new->tg_pt_gp_id); | |
2101 | ||
2102 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2103 | return count; | |
2104 | } | |
2105 | ||
2106 | ssize_t core_alua_show_access_type( | |
2107 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2108 | char *page) | |
2109 | { | |
125d0119 HR |
2110 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2111 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2112 | return sprintf(page, "Implicit and Explicit\n"); | |
2113 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2114 | return sprintf(page, "Implicit\n"); | |
2115 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2116 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2117 | else |
2118 | return sprintf(page, "None\n"); | |
2119 | } | |
2120 | ||
2121 | ssize_t core_alua_store_access_type( | |
2122 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2123 | const char *page, | |
2124 | size_t count) | |
2125 | { | |
2126 | unsigned long tmp; | |
2127 | int ret; | |
2128 | ||
57103d7f | 2129 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2130 | if (ret < 0) { |
6708bb27 | 2131 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2132 | return ret; |
c66ac9db NB |
2133 | } |
2134 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2135 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2136 | " %lu\n", tmp); |
2137 | return -EINVAL; | |
2138 | } | |
2139 | if (tmp == 3) | |
2140 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2141 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2142 | else if (tmp == 2) |
125d0119 | 2143 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2144 | else if (tmp == 1) |
125d0119 | 2145 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2146 | else |
2147 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2148 | ||
2149 | return count; | |
2150 | } | |
2151 | ||
2152 | ssize_t core_alua_show_nonop_delay_msecs( | |
2153 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2154 | char *page) | |
2155 | { | |
2156 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2157 | } | |
2158 | ||
2159 | ssize_t core_alua_store_nonop_delay_msecs( | |
2160 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2161 | const char *page, | |
2162 | size_t count) | |
2163 | { | |
2164 | unsigned long tmp; | |
2165 | int ret; | |
2166 | ||
57103d7f | 2167 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2168 | if (ret < 0) { |
6708bb27 | 2169 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2170 | return ret; |
c66ac9db NB |
2171 | } |
2172 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2173 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2174 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2175 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2176 | return -EINVAL; | |
2177 | } | |
2178 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2179 | ||
2180 | return count; | |
2181 | } | |
2182 | ||
2183 | ssize_t core_alua_show_trans_delay_msecs( | |
2184 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2185 | char *page) | |
2186 | { | |
2187 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2188 | } | |
2189 | ||
2190 | ssize_t core_alua_store_trans_delay_msecs( | |
2191 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2192 | const char *page, | |
2193 | size_t count) | |
2194 | { | |
2195 | unsigned long tmp; | |
2196 | int ret; | |
2197 | ||
57103d7f | 2198 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2199 | if (ret < 0) { |
6708bb27 | 2200 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2201 | return ret; |
c66ac9db NB |
2202 | } |
2203 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2204 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2205 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2206 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2207 | return -EINVAL; | |
2208 | } | |
2209 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2210 | ||
2211 | return count; | |
2212 | } | |
2213 | ||
125d0119 | 2214 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2215 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2216 | char *page) | |
2217 | { | |
125d0119 | 2218 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2219 | } |
2220 | ||
125d0119 | 2221 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2222 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2223 | const char *page, | |
2224 | size_t count) | |
2225 | { | |
2226 | unsigned long tmp; | |
2227 | int ret; | |
2228 | ||
57103d7f | 2229 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2230 | if (ret < 0) { |
125d0119 | 2231 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2232 | return ret; |
5b9a4d72 | 2233 | } |
125d0119 HR |
2234 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2235 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2236 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2237 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2238 | return -EINVAL; |
2239 | } | |
125d0119 | 2240 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2241 | |
2242 | return count; | |
2243 | } | |
2244 | ||
c66ac9db NB |
2245 | ssize_t core_alua_show_preferred_bit( |
2246 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2247 | char *page) | |
2248 | { | |
2249 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2250 | } | |
2251 | ||
2252 | ssize_t core_alua_store_preferred_bit( | |
2253 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2254 | const char *page, | |
2255 | size_t count) | |
2256 | { | |
2257 | unsigned long tmp; | |
2258 | int ret; | |
2259 | ||
57103d7f | 2260 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2261 | if (ret < 0) { |
6708bb27 | 2262 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2263 | return ret; |
c66ac9db NB |
2264 | } |
2265 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2266 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2267 | return -EINVAL; |
2268 | } | |
2269 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2270 | ||
2271 | return count; | |
2272 | } | |
2273 | ||
2274 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2275 | { | |
6708bb27 | 2276 | if (!lun->lun_sep) |
c66ac9db NB |
2277 | return -ENODEV; |
2278 | ||
2279 | return sprintf(page, "%d\n", | |
2280 | atomic_read(&lun->lun_sep->sep_tg_pt_secondary_offline)); | |
2281 | } | |
2282 | ||
2283 | ssize_t core_alua_store_offline_bit( | |
2284 | struct se_lun *lun, | |
2285 | const char *page, | |
2286 | size_t count) | |
2287 | { | |
2288 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
2289 | unsigned long tmp; | |
2290 | int ret; | |
2291 | ||
6708bb27 | 2292 | if (!lun->lun_sep) |
c66ac9db NB |
2293 | return -ENODEV; |
2294 | ||
57103d7f | 2295 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2296 | if (ret < 0) { |
6708bb27 | 2297 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2298 | return ret; |
c66ac9db NB |
2299 | } |
2300 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2301 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2302 | tmp); |
2303 | return -EINVAL; | |
2304 | } | |
2305 | tg_pt_gp_mem = lun->lun_sep->sep_alua_tg_pt_gp_mem; | |
6708bb27 AG |
2306 | if (!tg_pt_gp_mem) { |
2307 | pr_err("Unable to locate *tg_pt_gp_mem\n"); | |
c66ac9db NB |
2308 | return -EINVAL; |
2309 | } | |
2310 | ||
2311 | ret = core_alua_set_tg_pt_secondary_state(tg_pt_gp_mem, | |
2312 | lun->lun_sep, 0, (int)tmp); | |
2313 | if (ret < 0) | |
2314 | return -EINVAL; | |
2315 | ||
2316 | return count; | |
2317 | } | |
2318 | ||
2319 | ssize_t core_alua_show_secondary_status( | |
2320 | struct se_lun *lun, | |
2321 | char *page) | |
2322 | { | |
2323 | return sprintf(page, "%d\n", lun->lun_sep->sep_tg_pt_secondary_stat); | |
2324 | } | |
2325 | ||
2326 | ssize_t core_alua_store_secondary_status( | |
2327 | struct se_lun *lun, | |
2328 | const char *page, | |
2329 | size_t count) | |
2330 | { | |
2331 | unsigned long tmp; | |
2332 | int ret; | |
2333 | ||
57103d7f | 2334 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2335 | if (ret < 0) { |
6708bb27 | 2336 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2337 | return ret; |
c66ac9db NB |
2338 | } |
2339 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2340 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2341 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2342 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2343 | tmp); |
2344 | return -EINVAL; | |
2345 | } | |
2346 | lun->lun_sep->sep_tg_pt_secondary_stat = (int)tmp; | |
2347 | ||
2348 | return count; | |
2349 | } | |
2350 | ||
2351 | ssize_t core_alua_show_secondary_write_metadata( | |
2352 | struct se_lun *lun, | |
2353 | char *page) | |
2354 | { | |
2355 | return sprintf(page, "%d\n", | |
2356 | lun->lun_sep->sep_tg_pt_secondary_write_md); | |
2357 | } | |
2358 | ||
2359 | ssize_t core_alua_store_secondary_write_metadata( | |
2360 | struct se_lun *lun, | |
2361 | const char *page, | |
2362 | size_t count) | |
2363 | { | |
2364 | unsigned long tmp; | |
2365 | int ret; | |
2366 | ||
57103d7f | 2367 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2368 | if (ret < 0) { |
6708bb27 | 2369 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2370 | return ret; |
c66ac9db NB |
2371 | } |
2372 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2373 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2374 | " %lu\n", tmp); |
2375 | return -EINVAL; | |
2376 | } | |
2377 | lun->lun_sep->sep_tg_pt_secondary_write_md = (int)tmp; | |
2378 | ||
2379 | return count; | |
2380 | } | |
2381 | ||
0fd97ccf | 2382 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2383 | { |
c87fbd56 CH |
2384 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && |
2385 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { | |
2386 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2387 | |
c66ac9db | 2388 | /* |
25985edc | 2389 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2390 | * LUN Group. |
2391 | */ | |
2392 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2393 | if (IS_ERR(lu_gp_mem)) |
2394 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2395 | |
c66ac9db NB |
2396 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2397 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2398 | default_lu_gp); |
c66ac9db NB |
2399 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2400 | ||
6708bb27 | 2401 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2402 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2403 | dev->transport->name); |
c66ac9db NB |
2404 | } |
2405 | ||
2406 | return 0; | |
2407 | } |