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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> | |
8dcf07be | 29 | #include <linux/delay.h> |
c53181af | 30 | #include <linux/export.h> |
8dcf07be | 31 | #include <linux/fcntl.h> |
0e9b10a9 | 32 | #include <linux/file.h> |
8dcf07be | 33 | #include <linux/fs.h> |
ba929992 | 34 | #include <scsi/scsi_proto.h> |
33395fb8 | 35 | #include <asm/unaligned.h> |
c66ac9db NB |
36 | |
37 | #include <target/target_core_base.h> | |
c4795fb2 CH |
38 | #include <target/target_core_backend.h> |
39 | #include <target/target_core_fabric.h> | |
c66ac9db | 40 | |
e26d99ae | 41 | #include "target_core_internal.h" |
c66ac9db | 42 | #include "target_core_alua.h" |
c66ac9db NB |
43 | #include "target_core_ua.h" |
44 | ||
bb91c1a0 | 45 | static sense_reason_t core_alua_check_transition(int state, int valid, |
1ca4d4fa | 46 | int *primary, int explicit); |
c66ac9db | 47 | static int core_alua_set_tg_pt_secondary_state( |
adf653f9 | 48 | struct se_lun *lun, int explicit, int offline); |
c66ac9db | 49 | |
bb91c1a0 HR |
50 | static char *core_alua_dump_state(int state); |
51 | ||
adf653f9 CH |
52 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
53 | struct t10_alua_tg_pt_gp *tg_pt_gp); | |
54 | ||
e3d6f909 AG |
55 | static u16 alua_lu_gps_counter; |
56 | static u32 alua_lu_gps_count; | |
57 | ||
58 | static DEFINE_SPINLOCK(lu_gps_lock); | |
59 | static LIST_HEAD(lu_gps_list); | |
60 | ||
61 | struct t10_alua_lu_gp *default_lu_gp; | |
62 | ||
c66094bf HR |
63 | /* |
64 | * REPORT REFERRALS | |
65 | * | |
66 | * See sbc3r35 section 5.23 | |
67 | */ | |
68 | sense_reason_t | |
69 | target_emulate_report_referrals(struct se_cmd *cmd) | |
70 | { | |
71 | struct se_device *dev = cmd->se_dev; | |
72 | struct t10_alua_lba_map *map; | |
73 | struct t10_alua_lba_map_member *map_mem; | |
74 | unsigned char *buf; | |
75 | u32 rd_len = 0, off; | |
76 | ||
77 | if (cmd->data_length < 4) { | |
78 | pr_warn("REPORT REFERRALS allocation length %u too" | |
79 | " small\n", cmd->data_length); | |
80 | return TCM_INVALID_CDB_FIELD; | |
81 | } | |
82 | ||
83 | buf = transport_kmap_data_sg(cmd); | |
84 | if (!buf) | |
85 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
86 | ||
87 | off = 4; | |
88 | spin_lock(&dev->t10_alua.lba_map_lock); | |
89 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
90 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
91 | transport_kunmap_data_sg(cmd); | |
92 | ||
93 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
94 | } | |
95 | ||
96 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
97 | lba_map_list) { | |
98 | int desc_num = off + 3; | |
99 | int pg_num; | |
100 | ||
101 | off += 4; | |
38edd724 HR |
102 | if (cmd->data_length > off) |
103 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 104 | off += 8; |
38edd724 HR |
105 | if (cmd->data_length > off) |
106 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
107 | off += 8; |
108 | rd_len += 20; | |
109 | pg_num = 0; | |
110 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
111 | lba_map_mem_list) { | |
38edd724 HR |
112 | int alua_state = map_mem->lba_map_mem_alua_state; |
113 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
114 | ||
115 | if (cmd->data_length > off) | |
116 | buf[off] = alua_state & 0x0f; | |
117 | off += 2; | |
118 | if (cmd->data_length > off) | |
119 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
120 | off++; | |
121 | if (cmd->data_length > off) | |
122 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 123 | off++; |
c66094bf HR |
124 | rd_len += 4; |
125 | pg_num++; | |
126 | } | |
38edd724 HR |
127 | if (cmd->data_length > desc_num) |
128 | buf[desc_num] = pg_num; | |
c66094bf HR |
129 | } |
130 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
131 | ||
132 | /* | |
133 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
134 | */ | |
135 | put_unaligned_be16(rd_len, &buf[2]); | |
136 | ||
137 | transport_kunmap_data_sg(cmd); | |
138 | ||
139 | target_complete_cmd(cmd, GOOD); | |
140 | return 0; | |
141 | } | |
142 | ||
c66ac9db NB |
143 | /* |
144 | * REPORT_TARGET_PORT_GROUPS | |
145 | * | |
146 | * See spc4r17 section 6.27 | |
147 | */ | |
de103c93 CH |
148 | sense_reason_t |
149 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 150 | { |
0fd97ccf | 151 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 152 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
adf653f9 | 153 | struct se_lun *lun; |
05d1c7c0 | 154 | unsigned char *buf; |
5b9a4d72 NB |
155 | u32 rd_len = 0, off; |
156 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 157 | |
6b20fa9a | 158 | /* |
5b9a4d72 NB |
159 | * Skip over RESERVED area to first Target port group descriptor |
160 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 161 | */ |
5b9a4d72 NB |
162 | if (ext_hdr != 0) |
163 | off = 8; | |
164 | else | |
165 | off = 4; | |
166 | ||
167 | if (cmd->data_length < off) { | |
168 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
169 | " small for %s header\n", cmd->data_length, | |
170 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 171 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 172 | } |
4949314c | 173 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
174 | if (!buf) |
175 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 176 | |
0fd97ccf CH |
177 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
178 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 179 | tg_pt_gp_list) { |
6b20fa9a NB |
180 | /* |
181 | * Check if the Target port group and Target port descriptor list | |
182 | * based on tg_pt_gp_members count will fit into the response payload. | |
183 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
184 | * the allocation length and the response is truncated. | |
185 | */ | |
186 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
187 | cmd->data_length) { | |
188 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
189 | continue; | |
190 | } | |
c66ac9db NB |
191 | /* |
192 | * PREF: Preferred target port bit, determine if this | |
193 | * bit should be set for port group. | |
194 | */ | |
195 | if (tg_pt_gp->tg_pt_gp_pref) | |
196 | buf[off] = 0x80; | |
197 | /* | |
198 | * Set the ASYMMETRIC ACCESS State | |
199 | */ | |
d19c4643 | 200 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_access_state & 0xff; |
c66ac9db NB |
201 | /* |
202 | * Set supported ASYMMETRIC ACCESS State bits | |
203 | */ | |
c0dc941e | 204 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
205 | /* |
206 | * TARGET PORT GROUP | |
207 | */ | |
a85d667e BVA |
208 | put_unaligned_be16(tg_pt_gp->tg_pt_gp_id, &buf[off]); |
209 | off += 2; | |
c66ac9db NB |
210 | |
211 | off++; /* Skip over Reserved */ | |
212 | /* | |
213 | * STATUS CODE | |
214 | */ | |
215 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
216 | /* | |
217 | * Vendor Specific field | |
218 | */ | |
219 | buf[off++] = 0x00; | |
220 | /* | |
221 | * TARGET PORT COUNT | |
222 | */ | |
223 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
224 | rd_len += 8; | |
225 | ||
226 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
227 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
228 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
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 | */ | |
a85d667e BVA |
238 | put_unaligned_be16(lun->lun_rtpi, &buf[off]); |
239 | off += 2; | |
c66ac9db NB |
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 | */ | |
adf653f9 CH |
263 | spin_lock(&cmd->se_lun->lun_tg_pt_gp_lock); |
264 | tg_pt_gp = cmd->se_lun->lun_tg_pt_gp; | |
265 | if (tg_pt_gp) | |
266 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; | |
267 | spin_unlock(&cmd->se_lun->lun_tg_pt_gp_lock); | |
5b9a4d72 | 268 | } |
4949314c | 269 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 270 | |
6bb35e00 | 271 | target_complete_cmd(cmd, GOOD); |
c66ac9db NB |
272 | return 0; |
273 | } | |
274 | ||
275 | /* | |
125d0119 | 276 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
277 | * |
278 | * See spc4r17 section 6.35 | |
279 | */ | |
de103c93 CH |
280 | sense_reason_t |
281 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 282 | { |
5951146d | 283 | struct se_device *dev = cmd->se_dev; |
adf653f9 | 284 | struct se_lun *l_lun = cmd->se_lun; |
e3d6f909 | 285 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; |
c66ac9db | 286 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
05d1c7c0 AG |
287 | unsigned char *buf; |
288 | unsigned char *ptr; | |
a0d50f62 | 289 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 290 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 291 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
292 | u16 tg_pt_id, rtpi; |
293 | ||
0d7f1299 PB |
294 | if (cmd->data_length < 4) { |
295 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
296 | " small\n", cmd->data_length); | |
de103c93 | 297 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
298 | } |
299 | ||
4949314c | 300 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
301 | if (!buf) |
302 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 303 | |
c66ac9db | 304 | /* |
125d0119 | 305 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
306 | * for the local tg_pt_gp. |
307 | */ | |
adf653f9 CH |
308 | spin_lock(&l_lun->lun_tg_pt_gp_lock); |
309 | l_tg_pt_gp = l_lun->lun_tg_pt_gp; | |
6708bb27 | 310 | if (!l_tg_pt_gp) { |
adf653f9 CH |
311 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
312 | pr_err("Unable to access l_lun->tg_pt_gp\n"); | |
de103c93 | 313 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 314 | goto out; |
c66ac9db | 315 | } |
c66ac9db | 316 | |
125d0119 | 317 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
adf653f9 | 318 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
6708bb27 | 319 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 320 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 321 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 322 | goto out; |
c66ac9db | 323 | } |
bb91c1a0 | 324 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
adf653f9 | 325 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
c66ac9db | 326 | |
05d1c7c0 AG |
327 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
328 | ||
c66ac9db | 329 | while (len < cmd->data_length) { |
de103c93 | 330 | bool found = false; |
c66ac9db NB |
331 | alua_access_state = (ptr[0] & 0x0f); |
332 | /* | |
333 | * Check the received ALUA access state, and determine if | |
334 | * the state is a primary or secondary target port asymmetric | |
335 | * access state. | |
336 | */ | |
1ca4d4fa MC |
337 | rc = core_alua_check_transition(alua_access_state, valid_states, |
338 | &primary, 1); | |
de103c93 | 339 | if (rc) { |
c66ac9db NB |
340 | /* |
341 | * If the SET TARGET PORT GROUPS attempts to establish | |
342 | * an invalid combination of target port asymmetric | |
343 | * access states or attempts to establish an | |
344 | * unsupported target port asymmetric access state, | |
345 | * then the command shall be terminated with CHECK | |
346 | * CONDITION status, with the sense key set to ILLEGAL | |
347 | * REQUEST, and the additional sense code set to INVALID | |
348 | * FIELD IN PARAMETER LIST. | |
349 | */ | |
05d1c7c0 | 350 | goto out; |
c66ac9db | 351 | } |
de103c93 | 352 | |
c66ac9db NB |
353 | /* |
354 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
355 | * specifies a primary target port asymmetric access state, | |
356 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
357 | * a primary target port group for which the primary target | |
358 | * port asymmetric access state shall be changed. If the | |
359 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
360 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
361 | * TARGET PORT field specifies the relative target port | |
362 | * identifier (see 3.1.120) of the target port for which the | |
363 | * secondary target port asymmetric access state shall be | |
364 | * changed. | |
365 | */ | |
366 | if (primary) { | |
33395fb8 | 367 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
368 | /* |
369 | * Locate the matching target port group ID from | |
370 | * the global tg_pt_gp list | |
371 | */ | |
0fd97ccf | 372 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 373 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 374 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 375 | tg_pt_gp_list) { |
6708bb27 | 376 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
377 | continue; |
378 | ||
379 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
380 | continue; | |
381 | ||
33940d09 | 382 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
de103c93 | 383 | |
0fd97ccf | 384 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 385 | |
de103c93 | 386 | if (!core_alua_do_port_transition(tg_pt_gp, |
adf653f9 | 387 | dev, l_lun, nacl, |
de103c93 CH |
388 | alua_access_state, 1)) |
389 | found = true; | |
c66ac9db | 390 | |
0fd97ccf | 391 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 392 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
c66ac9db NB |
393 | break; |
394 | } | |
0fd97ccf | 395 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 396 | } else { |
adf653f9 CH |
397 | struct se_lun *lun; |
398 | ||
c66ac9db | 399 | /* |
f1ae05d5 | 400 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
401 | * the Target Port in question for the the incoming |
402 | * SET_TARGET_PORT_GROUPS op. | |
403 | */ | |
33395fb8 | 404 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 405 | /* |
35d1efe8 | 406 | * Locate the matching relative target port identifier |
c66ac9db NB |
407 | * for the struct se_device storage object. |
408 | */ | |
409 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
410 | list_for_each_entry(lun, &dev->dev_sep_list, |
411 | lun_dev_link) { | |
412 | if (lun->lun_rtpi != rtpi) | |
c66ac9db NB |
413 | continue; |
414 | ||
adf653f9 | 415 | // XXX: racy unlock |
c66ac9db NB |
416 | spin_unlock(&dev->se_port_lock); |
417 | ||
de103c93 | 418 | if (!core_alua_set_tg_pt_secondary_state( |
adf653f9 | 419 | lun, 1, 1)) |
de103c93 | 420 | found = true; |
c66ac9db NB |
421 | |
422 | spin_lock(&dev->se_port_lock); | |
423 | break; | |
424 | } | |
425 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
426 | } |
427 | ||
428 | if (!found) { | |
429 | rc = TCM_INVALID_PARAMETER_LIST; | |
430 | goto out; | |
c66ac9db NB |
431 | } |
432 | ||
433 | ptr += 4; | |
434 | len += 4; | |
435 | } | |
436 | ||
05d1c7c0 | 437 | out: |
4949314c | 438 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
439 | if (!rc) |
440 | target_complete_cmd(cmd, GOOD); | |
441 | return rc; | |
c66ac9db NB |
442 | } |
443 | ||
1e3ab99d PB |
444 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
445 | { | |
446 | /* | |
447 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
448 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
449 | * by the ALUA primary or secondary access state.. | |
450 | */ | |
451 | pr_debug("[%s]: ALUA TG Port not available, " | |
452 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
453 | "0x04/0x%02x\n", | |
454 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
455 | ||
456 | cmd->scsi_asc = 0x04; | |
457 | cmd->scsi_ascq = alua_ascq; | |
458 | } | |
459 | ||
460 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
461 | struct se_cmd *cmd, |
462 | unsigned char *cdb, | |
1e3ab99d | 463 | int nonop_delay_msecs) |
c66ac9db NB |
464 | { |
465 | /* | |
466 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
467 | * later to determine if processing of this cmd needs to be | |
468 | * temporarily delayed for the Active/NonOptimized primary access state. | |
469 | */ | |
470 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
471 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
472 | } |
473 | ||
c66094bf HR |
474 | static inline int core_alua_state_lba_dependent( |
475 | struct se_cmd *cmd, | |
1e3ab99d | 476 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
477 | { |
478 | struct se_device *dev = cmd->se_dev; | |
479 | u64 segment_size, segment_mult, sectors, lba; | |
480 | ||
481 | /* Only need to check for cdb actually containing LBAs */ | |
482 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
483 | return 0; | |
484 | ||
485 | spin_lock(&dev->t10_alua.lba_map_lock); | |
486 | segment_size = dev->t10_alua.lba_map_segment_size; | |
487 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
488 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
489 | ||
490 | lba = cmd->t_task_lba; | |
491 | while (lba < cmd->t_task_lba + sectors) { | |
492 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
493 | struct t10_alua_lba_map_member *map_mem; | |
494 | ||
495 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
496 | lba_map_list) { | |
497 | u64 start_lba, last_lba; | |
498 | u64 first_lba = map->lba_map_first_lba; | |
499 | ||
500 | if (segment_mult) { | |
501 | u64 tmp = lba; | |
cdf55949 | 502 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
503 | |
504 | last_lba = first_lba + segment_size - 1; | |
505 | if (start_lba >= first_lba && | |
506 | start_lba <= last_lba) { | |
507 | lba += segment_size; | |
508 | cur_map = map; | |
509 | break; | |
510 | } | |
511 | } else { | |
512 | last_lba = map->lba_map_last_lba; | |
513 | if (lba >= first_lba && lba <= last_lba) { | |
514 | lba = last_lba + 1; | |
515 | cur_map = map; | |
516 | break; | |
517 | } | |
518 | } | |
519 | } | |
520 | if (!cur_map) { | |
521 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 522 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
523 | return 1; |
524 | } | |
525 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
526 | lba_map_mem_list) { | |
527 | if (map_mem->lba_map_mem_alua_pg_id != | |
528 | tg_pt_gp->tg_pt_gp_id) | |
529 | continue; | |
530 | switch(map_mem->lba_map_mem_alua_state) { | |
531 | case ALUA_ACCESS_STATE_STANDBY: | |
532 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 533 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
534 | return 1; |
535 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
536 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 537 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
538 | return 1; |
539 | default: | |
540 | break; | |
541 | } | |
542 | } | |
543 | } | |
544 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
545 | return 0; | |
546 | } | |
547 | ||
c66ac9db NB |
548 | static inline int core_alua_state_standby( |
549 | struct se_cmd *cmd, | |
1e3ab99d | 550 | unsigned char *cdb) |
c66ac9db NB |
551 | { |
552 | /* | |
553 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
554 | * spc4r17 section 5.9.2.4.4 | |
555 | */ | |
556 | switch (cdb[0]) { | |
557 | case INQUIRY: | |
558 | case LOG_SELECT: | |
559 | case LOG_SENSE: | |
560 | case MODE_SELECT: | |
561 | case MODE_SENSE: | |
562 | case REPORT_LUNS: | |
563 | case RECEIVE_DIAGNOSTIC: | |
564 | case SEND_DIAGNOSTIC: | |
e7810c2d | 565 | case READ_CAPACITY: |
30f359a6 | 566 | return 0; |
eb846d9f | 567 | case SERVICE_ACTION_IN_16: |
e7810c2d NB |
568 | switch (cdb[1] & 0x1f) { |
569 | case SAI_READ_CAPACITY_16: | |
570 | return 0; | |
571 | default: | |
572 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); | |
573 | return 1; | |
574 | } | |
c66ac9db | 575 | case MAINTENANCE_IN: |
ba539743 | 576 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
577 | case MI_REPORT_TARGET_PGS: |
578 | return 0; | |
579 | default: | |
1e3ab99d | 580 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
581 | return 1; |
582 | } | |
583 | case MAINTENANCE_OUT: | |
584 | switch (cdb[1]) { | |
585 | case MO_SET_TARGET_PGS: | |
586 | return 0; | |
587 | default: | |
1e3ab99d | 588 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
589 | return 1; |
590 | } | |
591 | case REQUEST_SENSE: | |
592 | case PERSISTENT_RESERVE_IN: | |
593 | case PERSISTENT_RESERVE_OUT: | |
594 | case READ_BUFFER: | |
595 | case WRITE_BUFFER: | |
596 | return 0; | |
597 | default: | |
1e3ab99d | 598 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
599 | return 1; |
600 | } | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | static inline int core_alua_state_unavailable( | |
606 | struct se_cmd *cmd, | |
1e3ab99d | 607 | unsigned char *cdb) |
c66ac9db NB |
608 | { |
609 | /* | |
610 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
611 | * spc4r17 section 5.9.2.4.5 | |
612 | */ | |
613 | switch (cdb[0]) { | |
614 | case INQUIRY: | |
615 | case REPORT_LUNS: | |
30f359a6 | 616 | return 0; |
c66ac9db | 617 | case MAINTENANCE_IN: |
ba539743 | 618 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
619 | case MI_REPORT_TARGET_PGS: |
620 | return 0; | |
621 | default: | |
1e3ab99d | 622 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
623 | return 1; |
624 | } | |
625 | case MAINTENANCE_OUT: | |
626 | switch (cdb[1]) { | |
627 | case MO_SET_TARGET_PGS: | |
628 | return 0; | |
629 | default: | |
1e3ab99d | 630 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
631 | return 1; |
632 | } | |
633 | case REQUEST_SENSE: | |
634 | case READ_BUFFER: | |
635 | case WRITE_BUFFER: | |
636 | return 0; | |
637 | default: | |
1e3ab99d | 638 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
639 | return 1; |
640 | } | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | static inline int core_alua_state_transition( | |
646 | struct se_cmd *cmd, | |
1e3ab99d | 647 | unsigned char *cdb) |
c66ac9db NB |
648 | { |
649 | /* | |
f1ae05d5 | 650 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
651 | * spc4r17 section 5.9.2.5 |
652 | */ | |
653 | switch (cdb[0]) { | |
654 | case INQUIRY: | |
655 | case REPORT_LUNS: | |
30f359a6 | 656 | return 0; |
c66ac9db | 657 | case MAINTENANCE_IN: |
ba539743 | 658 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
659 | case MI_REPORT_TARGET_PGS: |
660 | return 0; | |
661 | default: | |
1e3ab99d | 662 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
663 | return 1; |
664 | } | |
665 | case REQUEST_SENSE: | |
666 | case READ_BUFFER: | |
667 | case WRITE_BUFFER: | |
668 | return 0; | |
669 | default: | |
1e3ab99d | 670 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
671 | return 1; |
672 | } | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
677 | /* | |
f1ae05d5 | 678 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 679 | * return 0: Used to signal success |
f1ae05d5 | 680 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 681 | */ |
de103c93 CH |
682 | sense_reason_t |
683 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 684 | { |
c87fbd56 CH |
685 | struct se_device *dev = cmd->se_dev; |
686 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 687 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 688 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db | 689 | int out_alua_state, nonop_delay_msecs; |
c87fbd56 CH |
690 | |
691 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
692 | return 0; | |
530c6891 | 693 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) |
c87fbd56 | 694 | return 0; |
c66ac9db | 695 | |
c66ac9db NB |
696 | /* |
697 | * First, check for a struct se_port specific secondary ALUA target port | |
698 | * access state: OFFLINE | |
699 | */ | |
adf653f9 | 700 | if (atomic_read(&lun->lun_tg_pt_secondary_offline)) { |
6708bb27 | 701 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 702 | " target port\n"); |
1e3ab99d PB |
703 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
704 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db | 705 | } |
adf653f9 CH |
706 | |
707 | if (!lun->lun_tg_pt_gp) | |
89c12cc9 NB |
708 | return 0; |
709 | ||
adf653f9 CH |
710 | spin_lock(&lun->lun_tg_pt_gp_lock); |
711 | tg_pt_gp = lun->lun_tg_pt_gp; | |
d19c4643 | 712 | out_alua_state = tg_pt_gp->tg_pt_gp_alua_access_state; |
c66ac9db | 713 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; |
adf653f9 CH |
714 | |
715 | // XXX: keeps using tg_pt_gp witout reference after unlock | |
716 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db | 717 | /* |
73f3bf51 | 718 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 719 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
720 | * For the Optimized ALUA access state case, we want to process the |
721 | * incoming fabric cmd ASAP.. | |
722 | */ | |
73f3bf51 | 723 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
724 | return 0; |
725 | ||
726 | switch (out_alua_state) { | |
727 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 728 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 729 | break; |
c66ac9db | 730 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
731 | if (core_alua_state_standby(cmd, cdb)) |
732 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 733 | break; |
c66ac9db | 734 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
735 | if (core_alua_state_unavailable(cmd, cdb)) |
736 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 737 | break; |
c66ac9db | 738 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
739 | if (core_alua_state_transition(cmd, cdb)) |
740 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 741 | break; |
c66094bf | 742 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
743 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
744 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 745 | break; |
c66ac9db NB |
746 | /* |
747 | * OFFLINE is a secondary ALUA target port group access state, that is | |
adf653f9 | 748 | * handled above with struct se_lun->lun_tg_pt_secondary_offline=1 |
c66ac9db NB |
749 | */ |
750 | case ALUA_ACCESS_STATE_OFFLINE: | |
751 | default: | |
6708bb27 | 752 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 753 | out_alua_state); |
de103c93 | 754 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
755 | } |
756 | ||
de103c93 | 757 | return 0; |
c66ac9db NB |
758 | } |
759 | ||
760 | /* | |
125d0119 | 761 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 762 | */ |
de103c93 | 763 | static sense_reason_t |
1ca4d4fa | 764 | core_alua_check_transition(int state, int valid, int *primary, int explicit) |
c66ac9db | 765 | { |
bb91c1a0 HR |
766 | /* |
767 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
768 | * defined as primary target port asymmetric access states. | |
769 | */ | |
c66ac9db | 770 | switch (state) { |
73f3bf51 | 771 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
772 | if (!(valid & ALUA_AO_SUP)) |
773 | goto not_supported; | |
774 | *primary = 1; | |
775 | break; | |
c66ac9db | 776 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
777 | if (!(valid & ALUA_AN_SUP)) |
778 | goto not_supported; | |
779 | *primary = 1; | |
780 | break; | |
c66ac9db | 781 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
782 | if (!(valid & ALUA_S_SUP)) |
783 | goto not_supported; | |
784 | *primary = 1; | |
785 | break; | |
c66ac9db | 786 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
787 | if (!(valid & ALUA_U_SUP)) |
788 | goto not_supported; | |
c66ac9db NB |
789 | *primary = 1; |
790 | break; | |
c66094bf HR |
791 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
792 | if (!(valid & ALUA_LBD_SUP)) | |
793 | goto not_supported; | |
794 | *primary = 1; | |
795 | break; | |
c66ac9db NB |
796 | case ALUA_ACCESS_STATE_OFFLINE: |
797 | /* | |
798 | * OFFLINE state is defined as a secondary target port | |
799 | * asymmetric access state. | |
800 | */ | |
bb91c1a0 HR |
801 | if (!(valid & ALUA_O_SUP)) |
802 | goto not_supported; | |
c66ac9db NB |
803 | *primary = 0; |
804 | break; | |
bb91c1a0 | 805 | case ALUA_ACCESS_STATE_TRANSITION: |
1ca4d4fa MC |
806 | if (!(valid & ALUA_T_SUP) || explicit) |
807 | /* | |
808 | * Transitioning is set internally and by tcmu daemon, | |
809 | * and cannot be selected through a STPG. | |
810 | */ | |
811 | goto not_supported; | |
812 | *primary = 0; | |
813 | break; | |
c66ac9db | 814 | default: |
6708bb27 | 815 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 816 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
817 | } |
818 | ||
819 | return 0; | |
bb91c1a0 HR |
820 | |
821 | not_supported: | |
822 | pr_err("ALUA access state %s not supported", | |
823 | core_alua_dump_state(state)); | |
824 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
825 | } |
826 | ||
827 | static char *core_alua_dump_state(int state) | |
828 | { | |
829 | switch (state) { | |
73f3bf51 | 830 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
831 | return "Active/Optimized"; |
832 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
833 | return "Active/NonOptimized"; | |
c66094bf HR |
834 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
835 | return "LBA Dependent"; | |
c66ac9db NB |
836 | case ALUA_ACCESS_STATE_STANDBY: |
837 | return "Standby"; | |
838 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
839 | return "Unavailable"; | |
840 | case ALUA_ACCESS_STATE_OFFLINE: | |
841 | return "Offline"; | |
bb91c1a0 HR |
842 | case ALUA_ACCESS_STATE_TRANSITION: |
843 | return "Transitioning"; | |
c66ac9db NB |
844 | default: |
845 | return "Unknown"; | |
846 | } | |
847 | ||
848 | return NULL; | |
849 | } | |
850 | ||
851 | char *core_alua_dump_status(int status) | |
852 | { | |
853 | switch (status) { | |
854 | case ALUA_STATUS_NONE: | |
855 | return "None"; | |
125d0119 HR |
856 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
857 | return "Altered by Explicit STPG"; | |
858 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
859 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
860 | default: |
861 | return "Unknown"; | |
862 | } | |
863 | ||
864 | return NULL; | |
865 | } | |
866 | ||
867 | /* | |
868 | * Used by fabric modules to determine when we need to delay processing | |
869 | * for the Active/NonOptimized paths.. | |
870 | */ | |
871 | int core_alua_check_nonop_delay( | |
872 | struct se_cmd *cmd) | |
873 | { | |
874 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
875 | return 0; | |
876 | if (in_interrupt()) | |
877 | return 0; | |
878 | /* | |
879 | * The ALUA Active/NonOptimized access state delay can be disabled | |
880 | * in via configfs with a value of zero | |
881 | */ | |
6708bb27 | 882 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
883 | return 0; |
884 | /* | |
885 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
886 | * defined interval in core_alua_state_nonoptimized() | |
887 | */ | |
888 | msleep_interruptible(cmd->alua_nonop_delay); | |
889 | return 0; | |
890 | } | |
891 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
892 | ||
c66ac9db NB |
893 | static int core_alua_write_tpg_metadata( |
894 | const char *path, | |
895 | unsigned char *md_buf, | |
896 | u32 md_buf_len) | |
897 | { | |
0e9b10a9 | 898 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
e13ec939 | 899 | loff_t pos = 0; |
0e9b10a9 | 900 | int ret; |
c66ac9db | 901 | |
0e9b10a9 AV |
902 | if (IS_ERR(file)) { |
903 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
904 | return -ENODEV; |
905 | } | |
e13ec939 | 906 | ret = kernel_write(file, md_buf, md_buf_len, &pos); |
0e9b10a9 | 907 | if (ret < 0) |
6708bb27 | 908 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 909 | fput(file); |
f730f915 | 910 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
911 | } |
912 | ||
913 | /* | |
d19c4643 | 914 | * Called with tg_pt_gp->tg_pt_gp_transition_mutex held |
c66ac9db NB |
915 | */ |
916 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 917 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 918 | { |
1e0b9403 | 919 | unsigned char *md_buf; |
0fd97ccf | 920 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
55435bad | 921 | char *path; |
1e0b9403 HR |
922 | int len, rc; |
923 | ||
924 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
925 | if (!md_buf) { | |
926 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
927 | return -ENOMEM; | |
928 | } | |
c66ac9db | 929 | |
1e0b9403 | 930 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
931 | "tg_pt_gp_id=%hu\n" |
932 | "alua_access_state=0x%02x\n" | |
933 | "alua_access_status=0x%02x\n", | |
9c6e164c | 934 | tg_pt_gp->tg_pt_gp_id, |
d19c4643 | 935 | tg_pt_gp->tg_pt_gp_alua_access_state, |
c66ac9db NB |
936 | tg_pt_gp->tg_pt_gp_alua_access_status); |
937 | ||
55435bad DD |
938 | rc = -ENOMEM; |
939 | path = kasprintf(GFP_KERNEL, "%s/alua/tpgs_%s/%s", db_root, | |
940 | &wwn->unit_serial[0], | |
941 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); | |
942 | if (path) { | |
943 | rc = core_alua_write_tpg_metadata(path, md_buf, len); | |
944 | kfree(path); | |
945 | } | |
1e0b9403 HR |
946 | kfree(md_buf); |
947 | return rc; | |
c66ac9db NB |
948 | } |
949 | ||
ee8c07d0 | 950 | static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db NB |
951 | { |
952 | struct se_dev_entry *se_deve; | |
adf653f9 | 953 | struct se_lun *lun; |
c66ac9db | 954 | struct se_lun_acl *lacl; |
c66ac9db NB |
955 | |
956 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
957 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
958 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
959 | /* |
960 | * After an implicit target port asymmetric access state | |
961 | * change, a device server shall establish a unit attention | |
962 | * condition for the initiator port associated with every I_T | |
963 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 964 | * ACCESS STATE CHANGED. |
c66ac9db NB |
965 | * |
966 | * After an explicit target port asymmetric access state | |
967 | * change, a device server shall establish a unit attention | |
968 | * condition with the additional sense code set to ASYMMETRIC | |
969 | * ACCESS STATE CHANGED for the initiator port associated with | |
970 | * every I_T nexus other than the I_T nexus on which the SET | |
971 | * TARGET PORT GROUPS command | |
972 | */ | |
9e37d042 NB |
973 | if (!percpu_ref_tryget_live(&lun->lun_ref)) |
974 | continue; | |
c66ac9db NB |
975 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
976 | ||
1adff1b3 | 977 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 978 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) { |
29a05dee | 979 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
adf653f9 | 980 | lockdep_is_held(&lun->lun_deve_lock)); |
c51c8e7b | 981 | |
c66ac9db | 982 | /* |
c51c8e7b HR |
983 | * spc4r37 p.242: |
984 | * After an explicit target port asymmetric access | |
985 | * state change, a device server shall establish a | |
986 | * unit attention condition with the additional sense | |
987 | * code set to ASYMMETRIC ACCESS STATE CHANGED for | |
988 | * the initiator port associated with every I_T nexus | |
989 | * other than the I_T nexus on which the SET TARGET | |
990 | * PORT GROUPS command was received. | |
c66ac9db | 991 | */ |
9c6e164c HR |
992 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
993 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
adf653f9 CH |
994 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
995 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
996 | continue; |
997 | ||
c51c8e7b HR |
998 | /* |
999 | * se_deve->se_lun_acl pointer may be NULL for a | |
1000 | * entry created without explicit Node+MappedLUN ACLs | |
1001 | */ | |
1002 | if (lacl && (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
1003 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl)) | |
1004 | continue; | |
1005 | ||
1006 | core_scsi3_ua_allocate(se_deve, 0x2A, | |
c66ac9db NB |
1007 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); |
1008 | } | |
1adff1b3 | 1009 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db NB |
1010 | |
1011 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 1012 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
1013 | } |
1014 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
ee8c07d0 HR |
1015 | } |
1016 | ||
9c6e164c HR |
1017 | static int core_alua_do_transition_tg_pt( |
1018 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1019 | int new_state, | |
1020 | int explicit) | |
1021 | { | |
d19c4643 | 1022 | int prev_state; |
9c6e164c | 1023 | |
d19c4643 | 1024 | mutex_lock(&tg_pt_gp->tg_pt_gp_transition_mutex); |
9c6e164c | 1025 | /* Nothing to be done here */ |
d19c4643 MC |
1026 | if (tg_pt_gp->tg_pt_gp_alua_access_state == new_state) { |
1027 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
9c6e164c | 1028 | return 0; |
d19c4643 | 1029 | } |
9c6e164c | 1030 | |
d19c4643 MC |
1031 | if (explicit && new_state == ALUA_ACCESS_STATE_TRANSITION) { |
1032 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
9c6e164c | 1033 | return -EAGAIN; |
d19c4643 | 1034 | } |
9c6e164c HR |
1035 | |
1036 | /* | |
1037 | * Save the old primary ALUA access state, and set the current state | |
1038 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1039 | */ | |
d19c4643 MC |
1040 | prev_state = tg_pt_gp->tg_pt_gp_alua_access_state; |
1041 | tg_pt_gp->tg_pt_gp_alua_access_state = ALUA_ACCESS_STATE_TRANSITION; | |
9c6e164c HR |
1042 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? |
1043 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1044 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1045 | ||
ee8c07d0 HR |
1046 | core_alua_queue_state_change_ua(tg_pt_gp); |
1047 | ||
d19c4643 MC |
1048 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) { |
1049 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
1ca4d4fa | 1050 | return 0; |
d19c4643 | 1051 | } |
1ca4d4fa | 1052 | |
9c6e164c HR |
1053 | /* |
1054 | * Check for the optional ALUA primary state transition delay | |
1055 | */ | |
1056 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1057 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1058 | ||
1059 | /* | |
d19c4643 | 1060 | * Set the current primary ALUA access state to the requested new state |
9c6e164c | 1061 | */ |
d19c4643 | 1062 | tg_pt_gp->tg_pt_gp_alua_access_state = new_state; |
9c6e164c | 1063 | |
d19c4643 MC |
1064 | /* |
1065 | * Update the ALUA metadata buf that has been allocated in | |
1066 | * core_alua_do_port_transition(), this metadata will be written | |
1067 | * to struct file. | |
1068 | * | |
1069 | * Note that there is the case where we do not want to update the | |
1070 | * metadata when the saved metadata is being parsed in userspace | |
1071 | * when setting the existing port access state and access status. | |
1072 | * | |
1073 | * Also note that the failure to write out the ALUA metadata to | |
1074 | * struct file does NOT affect the actual ALUA transition. | |
1075 | */ | |
1076 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1077 | core_alua_update_tpg_primary_metadata(tg_pt_gp); | |
9c6e164c | 1078 | } |
c66ac9db | 1079 | |
d19c4643 MC |
1080 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
1081 | " from primary access state %s to %s\n", (explicit) ? "explicit" : | |
1082 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
1083 | tg_pt_gp->tg_pt_gp_id, | |
1084 | core_alua_dump_state(prev_state), | |
1085 | core_alua_dump_state(new_state)); | |
1086 | ||
1087 | core_alua_queue_state_change_ua(tg_pt_gp); | |
1088 | ||
1089 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
c66ac9db NB |
1090 | return 0; |
1091 | } | |
1092 | ||
1093 | int core_alua_do_port_transition( | |
1094 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1095 | struct se_device *l_dev, | |
adf653f9 | 1096 | struct se_lun *l_lun, |
c66ac9db NB |
1097 | struct se_node_acl *l_nacl, |
1098 | int new_state, | |
125d0119 | 1099 | int explicit) |
c66ac9db NB |
1100 | { |
1101 | struct se_device *dev; | |
c66ac9db NB |
1102 | struct t10_alua_lu_gp *lu_gp; |
1103 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1104 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1105 | int primary, valid_states, rc = 0; |
c66ac9db | 1106 | |
0a414572 MC |
1107 | if (l_dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) |
1108 | return -ENODEV; | |
1109 | ||
bb91c1a0 | 1110 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1ca4d4fa MC |
1111 | if (core_alua_check_transition(new_state, valid_states, &primary, |
1112 | explicit) != 0) | |
c66ac9db NB |
1113 | return -EINVAL; |
1114 | ||
c66ac9db NB |
1115 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1116 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1117 | lu_gp = local_lu_gp_mem->lu_gp; | |
1118 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1119 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1120 | /* | |
1121 | * For storage objects that are members of the 'default_lu_gp', | |
1122 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1123 | * on all of the matching target port groups IDs in default_lu_gp. | |
1124 | */ | |
6708bb27 | 1125 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1126 | /* |
1127 | * core_alua_do_transition_tg_pt() will always return | |
1128 | * success. | |
1129 | */ | |
adf653f9 | 1130 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1131 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1132 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1133 | new_state, explicit); | |
33940d09 | 1134 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1135 | return rc; |
c66ac9db NB |
1136 | } |
1137 | /* | |
1138 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1139 | * the associated storage objects looking for a matching target port | |
1140 | * group ID from the local target port group. | |
1141 | */ | |
1142 | spin_lock(&lu_gp->lu_gp_lock); | |
1143 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1144 | lu_gp_mem_list) { | |
1145 | ||
1146 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1147 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1148 | spin_unlock(&lu_gp->lu_gp_lock); |
1149 | ||
0fd97ccf | 1150 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1151 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1152 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1153 | tg_pt_gp_list) { |
1154 | ||
6708bb27 | 1155 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1156 | continue; |
1157 | /* | |
1158 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1159 | * is changed for any target port group accessible via |
c66ac9db NB |
1160 | * a logical unit within a LU group, the target port |
1161 | * behavior group asymmetric access states for the same | |
1162 | * target port group accessible via other logical units | |
1163 | * in that LU group will also change. | |
1164 | */ | |
1165 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1166 | continue; | |
1167 | ||
1168 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1169 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1170 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1171 | } else { |
adf653f9 | 1172 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1173 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1174 | } |
33940d09 | 1175 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1176 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1177 | /* |
1178 | * core_alua_do_transition_tg_pt() will always return | |
1179 | * success. | |
1180 | */ | |
9c6e164c HR |
1181 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1182 | new_state, explicit); | |
c66ac9db | 1183 | |
0fd97ccf | 1184 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1185 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1186 | if (rc) |
1187 | break; | |
c66ac9db | 1188 | } |
0fd97ccf | 1189 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1190 | |
1191 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1192 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1193 | } |
1194 | spin_unlock(&lu_gp->lu_gp_lock); | |
1195 | ||
9c6e164c HR |
1196 | if (!rc) { |
1197 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1198 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1199 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1200 | l_tg_pt_gp->tg_pt_gp_id, | |
1201 | (explicit) ? "explicit" : "implicit", | |
1202 | core_alua_dump_state(new_state)); | |
1203 | } | |
c66ac9db | 1204 | |
33940d09 | 1205 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1206 | return rc; |
c66ac9db NB |
1207 | } |
1208 | ||
adf653f9 | 1209 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1210 | { |
adf653f9 | 1211 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1212 | unsigned char *md_buf; |
55435bad | 1213 | char *path; |
1e0b9403 HR |
1214 | int len, rc; |
1215 | ||
adf653f9 CH |
1216 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1217 | ||
1e0b9403 HR |
1218 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1219 | if (!md_buf) { | |
1220 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1221 | rc = -ENOMEM; |
1222 | goto out_unlock; | |
1e0b9403 | 1223 | } |
c66ac9db | 1224 | |
1e0b9403 | 1225 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1226 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1227 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1228 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1229 | |
55435bad DD |
1230 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) { |
1231 | path = kasprintf(GFP_KERNEL, "%s/alua/%s/%s+%hu/lun_%llu", | |
1232 | db_root, se_tpg->se_tpg_tfo->get_fabric_name(), | |
1233 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
1234 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg), | |
1235 | lun->unpacked_lun); | |
1236 | } else { | |
1237 | path = kasprintf(GFP_KERNEL, "%s/alua/%s/%s/lun_%llu", | |
1238 | db_root, se_tpg->se_tpg_tfo->get_fabric_name(), | |
1239 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
1240 | lun->unpacked_lun); | |
1241 | } | |
1242 | if (!path) { | |
1243 | rc = -ENOMEM; | |
1244 | goto out_free; | |
1245 | } | |
c66ac9db | 1246 | |
1e0b9403 | 1247 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
55435bad DD |
1248 | kfree(path); |
1249 | out_free: | |
1e0b9403 | 1250 | kfree(md_buf); |
adf653f9 CH |
1251 | out_unlock: |
1252 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1253 | return rc; |
c66ac9db NB |
1254 | } |
1255 | ||
1256 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1257 | struct se_lun *lun, |
125d0119 | 1258 | int explicit, |
c66ac9db NB |
1259 | int offline) |
1260 | { | |
1261 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1262 | int trans_delay_msecs; |
1263 | ||
adf653f9 CH |
1264 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1265 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1266 | if (!tg_pt_gp) { |
adf653f9 | 1267 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1268 | pr_err("Unable to complete secondary state" |
c66ac9db | 1269 | " transition\n"); |
e3d6f909 | 1270 | return -EINVAL; |
c66ac9db NB |
1271 | } |
1272 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1273 | /* | |
1274 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1275 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1276 | */ |
1277 | if (offline) | |
adf653f9 | 1278 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1279 | else |
adf653f9 | 1280 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1281 | |
adf653f9 | 1282 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1283 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1284 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1285 | |
6708bb27 | 1286 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1287 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1288 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1289 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1290 | ||
adf653f9 | 1291 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1292 | /* |
1293 | * Do the optional transition delay after we set the secondary | |
1294 | * ALUA access state. | |
1295 | */ | |
1296 | if (trans_delay_msecs != 0) | |
1297 | msleep_interruptible(trans_delay_msecs); | |
1298 | /* | |
1299 | * See if we need to update the ALUA fabric port metadata for | |
1300 | * secondary state and status | |
1301 | */ | |
adf653f9 CH |
1302 | if (lun->lun_tg_pt_secondary_write_md) |
1303 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1304 | |
1305 | return 0; | |
1306 | } | |
1307 | ||
229d4f11 HR |
1308 | struct t10_alua_lba_map * |
1309 | core_alua_allocate_lba_map(struct list_head *list, | |
1310 | u64 first_lba, u64 last_lba) | |
1311 | { | |
1312 | struct t10_alua_lba_map *lba_map; | |
1313 | ||
1314 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1315 | if (!lba_map) { | |
1316 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1317 | return ERR_PTR(-ENOMEM); | |
1318 | } | |
1319 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1320 | lba_map->lba_map_first_lba = first_lba; | |
1321 | lba_map->lba_map_last_lba = last_lba; | |
1322 | ||
1323 | list_add_tail(&lba_map->lba_map_list, list); | |
1324 | return lba_map; | |
1325 | } | |
1326 | ||
1327 | int | |
1328 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1329 | int pg_id, int state) | |
1330 | { | |
1331 | struct t10_alua_lba_map_member *lba_map_mem; | |
1332 | ||
1333 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1334 | lba_map_mem_list) { | |
1335 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1336 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1337 | return -EINVAL; | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1342 | if (!lba_map_mem) { | |
1343 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1344 | return -ENOMEM; | |
1345 | } | |
1346 | lba_map_mem->lba_map_mem_alua_state = state; | |
1347 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1348 | ||
1349 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1350 | &lba_map->lba_map_mem_list); | |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | void | |
1355 | core_alua_free_lba_map(struct list_head *lba_list) | |
1356 | { | |
1357 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1358 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1359 | ||
1360 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1361 | lba_map_list) { | |
1362 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1363 | &lba_map->lba_map_mem_list, | |
1364 | lba_map_mem_list) { | |
1365 | list_del(&lba_map_mem->lba_map_mem_list); | |
1366 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1367 | lba_map_mem); | |
1368 | } | |
1369 | list_del(&lba_map->lba_map_list); | |
1370 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | void | |
1375 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1376 | int segment_size, int segment_mult) | |
1377 | { | |
1378 | struct list_head old_lba_map_list; | |
1379 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1380 | int activate = 0, supported; | |
1381 | ||
1382 | INIT_LIST_HEAD(&old_lba_map_list); | |
1383 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1384 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1385 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1386 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1387 | if (lba_map_list) { | |
1388 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1389 | activate = 1; | |
1390 | } | |
1391 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1392 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1393 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1394 | tg_pt_gp_list) { | |
1395 | ||
1396 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1397 | continue; | |
1398 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1399 | if (activate) | |
1400 | supported |= ALUA_LBD_SUP; | |
1401 | else | |
1402 | supported &= ~ALUA_LBD_SUP; | |
1403 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1404 | } | |
1405 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1406 | core_alua_free_lba_map(&old_lba_map_list); | |
1407 | } | |
1408 | ||
c66ac9db NB |
1409 | struct t10_alua_lu_gp * |
1410 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1411 | { | |
1412 | struct t10_alua_lu_gp *lu_gp; | |
1413 | ||
1414 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1415 | if (!lu_gp) { |
1416 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1417 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1418 | } |
e3d6f909 | 1419 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1420 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1421 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1422 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1423 | ||
1424 | if (def_group) { | |
e3d6f909 | 1425 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1426 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1427 | alua_lu_gps_count++; |
c66ac9db NB |
1428 | } |
1429 | ||
1430 | return lu_gp; | |
1431 | } | |
1432 | ||
1433 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1434 | { | |
1435 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1436 | u16 lu_gp_id_tmp; | |
1437 | /* | |
1438 | * The lu_gp->lu_gp_id may only be set once.. | |
1439 | */ | |
1440 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1441 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1442 | " ignoring request\n"); |
e3d6f909 | 1443 | return -EINVAL; |
c66ac9db NB |
1444 | } |
1445 | ||
e3d6f909 AG |
1446 | spin_lock(&lu_gps_lock); |
1447 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1448 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1449 | " 0x0000ffff reached\n"); |
e3d6f909 | 1450 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1451 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1452 | return -ENOSPC; |
c66ac9db NB |
1453 | } |
1454 | again: | |
1455 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1456 | alua_lu_gps_counter++; |
c66ac9db | 1457 | |
e3d6f909 | 1458 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1459 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1460 | if (!lu_gp_id) |
c66ac9db NB |
1461 | goto again; |
1462 | ||
6708bb27 | 1463 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1464 | " already exists, ignoring request\n", |
1465 | lu_gp_id); | |
e3d6f909 AG |
1466 | spin_unlock(&lu_gps_lock); |
1467 | return -EINVAL; | |
c66ac9db NB |
1468 | } |
1469 | } | |
1470 | ||
1471 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1472 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1473 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1474 | alua_lu_gps_count++; | |
1475 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1476 | |
1477 | return 0; | |
1478 | } | |
1479 | ||
1480 | static struct t10_alua_lu_gp_member * | |
1481 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1482 | { | |
1483 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1484 | ||
1485 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1486 | if (!lu_gp_mem) { |
1487 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1488 | return ERR_PTR(-ENOMEM); |
1489 | } | |
1490 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1491 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1492 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1493 | ||
1494 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1495 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1496 | ||
1497 | return lu_gp_mem; | |
1498 | } | |
1499 | ||
1500 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1501 | { | |
1502 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1503 | /* | |
1504 | * Once we have reached this point, config_item_put() has | |
1505 | * already been called from target_core_alua_drop_lu_gp(). | |
1506 | * | |
1507 | * Here, we remove the *lu_gp from the global list so that | |
1508 | * no associations can be made while we are releasing | |
1509 | * struct t10_alua_lu_gp. | |
1510 | */ | |
e3d6f909 | 1511 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1512 | list_del(&lu_gp->lu_gp_node); |
1513 | alua_lu_gps_count--; | |
1514 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1515 | /* |
1516 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1517 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1518 | * released with core_alua_put_lu_gp_from_name() | |
1519 | */ | |
1520 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1521 | cpu_relax(); | |
1522 | /* | |
1523 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1524 | * struct se_device. | |
1525 | */ | |
1526 | spin_lock(&lu_gp->lu_gp_lock); | |
1527 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1528 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1529 | if (lu_gp_mem->lu_gp_assoc) { | |
1530 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1531 | lu_gp->lu_gp_members--; | |
1532 | lu_gp_mem->lu_gp_assoc = 0; | |
1533 | } | |
1534 | spin_unlock(&lu_gp->lu_gp_lock); | |
1535 | /* | |
1536 | * | |
25985edc | 1537 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1538 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1539 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1540 | * | |
1541 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1542 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1543 | */ |
1544 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1545 | if (lu_gp != default_lu_gp) |
c66ac9db | 1546 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1547 | default_lu_gp); |
c66ac9db NB |
1548 | else |
1549 | lu_gp_mem->lu_gp = NULL; | |
1550 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1551 | ||
1552 | spin_lock(&lu_gp->lu_gp_lock); | |
1553 | } | |
1554 | spin_unlock(&lu_gp->lu_gp_lock); | |
1555 | ||
1556 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1557 | } | |
1558 | ||
1559 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1560 | { | |
c66ac9db NB |
1561 | struct t10_alua_lu_gp *lu_gp; |
1562 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1563 | ||
c66ac9db | 1564 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1565 | if (!lu_gp_mem) |
c66ac9db NB |
1566 | return; |
1567 | ||
1568 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1569 | cpu_relax(); | |
1570 | ||
1571 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1572 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1573 | if (lu_gp) { |
c66ac9db NB |
1574 | spin_lock(&lu_gp->lu_gp_lock); |
1575 | if (lu_gp_mem->lu_gp_assoc) { | |
1576 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1577 | lu_gp->lu_gp_members--; | |
1578 | lu_gp_mem->lu_gp_assoc = 0; | |
1579 | } | |
1580 | spin_unlock(&lu_gp->lu_gp_lock); | |
1581 | lu_gp_mem->lu_gp = NULL; | |
1582 | } | |
1583 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1584 | ||
1585 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1586 | } | |
1587 | ||
1588 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1589 | { | |
1590 | struct t10_alua_lu_gp *lu_gp; | |
1591 | struct config_item *ci; | |
1592 | ||
e3d6f909 AG |
1593 | spin_lock(&lu_gps_lock); |
1594 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1595 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1596 | continue; |
1597 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1598 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1599 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1600 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1601 | return lu_gp; |
1602 | } | |
1603 | } | |
e3d6f909 | 1604 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1605 | |
1606 | return NULL; | |
1607 | } | |
1608 | ||
1609 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1610 | { | |
e3d6f909 | 1611 | spin_lock(&lu_gps_lock); |
c66ac9db | 1612 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1613 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1614 | } |
1615 | ||
1616 | /* | |
1617 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1618 | */ | |
1619 | void __core_alua_attach_lu_gp_mem( | |
1620 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1621 | struct t10_alua_lu_gp *lu_gp) | |
1622 | { | |
1623 | spin_lock(&lu_gp->lu_gp_lock); | |
1624 | lu_gp_mem->lu_gp = lu_gp; | |
1625 | lu_gp_mem->lu_gp_assoc = 1; | |
1626 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1627 | lu_gp->lu_gp_members++; | |
1628 | spin_unlock(&lu_gp->lu_gp_lock); | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1633 | */ | |
1634 | void __core_alua_drop_lu_gp_mem( | |
1635 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1636 | struct t10_alua_lu_gp *lu_gp) | |
1637 | { | |
1638 | spin_lock(&lu_gp->lu_gp_lock); | |
1639 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1640 | lu_gp_mem->lu_gp = NULL; | |
1641 | lu_gp_mem->lu_gp_assoc = 0; | |
1642 | lu_gp->lu_gp_members--; | |
1643 | spin_unlock(&lu_gp->lu_gp_lock); | |
1644 | } | |
1645 | ||
0fd97ccf CH |
1646 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1647 | const char *name, int def_group) | |
c66ac9db NB |
1648 | { |
1649 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1650 | ||
1651 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1652 | if (!tg_pt_gp) { |
1653 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1654 | return NULL; |
1655 | } | |
1656 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1657 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
d19c4643 | 1658 | mutex_init(&tg_pt_gp->tg_pt_gp_transition_mutex); |
c66ac9db NB |
1659 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); |
1660 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
0fd97ccf | 1661 | tg_pt_gp->tg_pt_gp_dev = dev; |
d19c4643 MC |
1662 | tg_pt_gp->tg_pt_gp_alua_access_state = |
1663 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; | |
c66ac9db | 1664 | /* |
125d0119 | 1665 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1666 | */ |
1667 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1668 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1669 | /* |
1670 | * Set the default Active/NonOptimized Delay in milliseconds | |
1671 | */ | |
1672 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1673 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1674 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1675 | |
c0dc941e HR |
1676 | /* |
1677 | * Enable all supported states | |
1678 | */ | |
1679 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1680 | ALUA_T_SUP | ALUA_O_SUP | | |
1681 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1682 | ||
c66ac9db | 1683 | if (def_group) { |
0fd97ccf | 1684 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1685 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1686 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1687 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1688 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1689 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1690 | &dev->t10_alua.tg_pt_gps_list); |
1691 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1692 | } |
1693 | ||
1694 | return tg_pt_gp; | |
1695 | } | |
1696 | ||
1697 | int core_alua_set_tg_pt_gp_id( | |
1698 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1699 | u16 tg_pt_gp_id) | |
1700 | { | |
0fd97ccf | 1701 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1702 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1703 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1704 | |
c66ac9db NB |
1705 | /* |
1706 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1707 | */ | |
1708 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1709 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1710 | " ignoring request\n"); |
e3d6f909 | 1711 | return -EINVAL; |
c66ac9db NB |
1712 | } |
1713 | ||
0fd97ccf CH |
1714 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1715 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1716 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1717 | " 0x0000ffff reached\n"); |
0fd97ccf | 1718 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1719 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1720 | return -ENOSPC; |
c66ac9db NB |
1721 | } |
1722 | again: | |
1723 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1724 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1725 | |
0fd97ccf | 1726 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1727 | tg_pt_gp_list) { |
1728 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1729 | if (!tg_pt_gp_id) |
c66ac9db NB |
1730 | goto again; |
1731 | ||
6708bb27 | 1732 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1733 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1734 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1735 | return -EINVAL; |
c66ac9db NB |
1736 | } |
1737 | } | |
1738 | ||
1739 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1740 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1741 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1742 | &dev->t10_alua.tg_pt_gps_list); |
1743 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1744 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1745 | |
1746 | return 0; | |
1747 | } | |
1748 | ||
c66ac9db NB |
1749 | void core_alua_free_tg_pt_gp( |
1750 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1751 | { | |
0fd97ccf | 1752 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1753 | struct se_lun *lun, *next; |
0fd97ccf | 1754 | |
c66ac9db NB |
1755 | /* |
1756 | * Once we have reached this point, config_item_put() has already | |
1757 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1758 | * | |
1759 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1760 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1761 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1762 | */ | |
0fd97ccf | 1763 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1764 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1765 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1766 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1767 | ||
c66ac9db NB |
1768 | /* |
1769 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1770 | * core_alua_get_tg_pt_gp_by_name() in | |
1771 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1772 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1773 | */ | |
1774 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1775 | cpu_relax(); | |
0fd97ccf | 1776 | |
c66ac9db NB |
1777 | /* |
1778 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1779 | * struct se_port. | |
1780 | */ | |
1781 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1782 | list_for_each_entry_safe(lun, next, |
1783 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1784 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1785 | tg_pt_gp->tg_pt_gp_members--; | |
1786 | ||
c66ac9db NB |
1787 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1788 | /* | |
c66ac9db | 1789 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1790 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1791 | * default_tg_pt_gp. |
1792 | */ | |
adf653f9 | 1793 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1794 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1795 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1796 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1797 | } else |
adf653f9 CH |
1798 | lun->lun_tg_pt_gp = NULL; |
1799 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1800 | |
1801 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1802 | } | |
1803 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1804 | ||
1805 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1806 | } | |
1807 | ||
c66ac9db | 1808 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1809 | struct se_device *dev, const char *name) |
c66ac9db NB |
1810 | { |
1811 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1812 | struct config_item *ci; | |
1813 | ||
0fd97ccf CH |
1814 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1815 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1816 | tg_pt_gp_list) { |
6708bb27 | 1817 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1818 | continue; |
1819 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1820 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1821 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1822 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1823 | return tg_pt_gp; |
1824 | } | |
1825 | } | |
0fd97ccf | 1826 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1827 | |
1828 | return NULL; | |
1829 | } | |
1830 | ||
1831 | static void core_alua_put_tg_pt_gp_from_name( | |
1832 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1833 | { | |
0fd97ccf | 1834 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1835 | |
0fd97ccf | 1836 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1837 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1838 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1839 | } |
1840 | ||
adf653f9 CH |
1841 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1842 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1843 | { |
3dd348fc HR |
1844 | struct se_dev_entry *se_deve; |
1845 | ||
adf653f9 CH |
1846 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1847 | ||
c66ac9db | 1848 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1849 | lun->lun_tg_pt_gp = tg_pt_gp; |
1850 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db | 1851 | tg_pt_gp->tg_pt_gp_members++; |
3dd348fc HR |
1852 | spin_lock(&lun->lun_deve_lock); |
1853 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) | |
1854 | core_scsi3_ua_allocate(se_deve, 0x3f, | |
1855 | ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); | |
1856 | spin_unlock(&lun->lun_deve_lock); | |
c66ac9db NB |
1857 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1858 | } | |
1859 | ||
adf653f9 CH |
1860 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1861 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1862 | { |
adf653f9 CH |
1863 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1864 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1865 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1866 | } | |
1867 | ||
1868 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1869 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1870 | { |
adf653f9 CH |
1871 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1872 | ||
c66ac9db | 1873 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1874 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1875 | tg_pt_gp->tg_pt_gp_members--; |
1876 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1877 | |
1878 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1879 | } |
1880 | ||
adf653f9 CH |
1881 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1882 | { | |
1883 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1884 | ||
1885 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1886 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1887 | if (tg_pt_gp) | |
1888 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1889 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1890 | } | |
1891 | ||
1892 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1893 | { |
c66ac9db | 1894 | struct config_item *tg_pt_ci; |
c66ac9db | 1895 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1896 | ssize_t len = 0; |
1897 | ||
adf653f9 CH |
1898 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1899 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1900 | if (tg_pt_gp) { |
c66ac9db NB |
1901 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1902 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1903 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1904 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1905 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1906 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
d19c4643 MC |
1907 | core_alua_dump_state( |
1908 | tg_pt_gp->tg_pt_gp_alua_access_state), | |
c66ac9db NB |
1909 | core_alua_dump_status( |
1910 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1911 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1912 | "Offline" : "None", |
adf653f9 | 1913 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1914 | } |
adf653f9 | 1915 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1916 | |
1917 | return len; | |
1918 | } | |
1919 | ||
1920 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1921 | struct se_lun *lun, |
c66ac9db NB |
1922 | const char *page, |
1923 | size_t count) | |
1924 | { | |
adf653f9 | 1925 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1926 | /* |
1927 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1928 | * reference to se_device->dev_group. | |
1929 | */ | |
1930 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1931 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1932 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1933 | int move = 0; | |
1934 | ||
530c6891 | 1935 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA || |
adf653f9 CH |
1936 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
1937 | return -ENODEV; | |
c66ac9db NB |
1938 | |
1939 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1940 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1941 | return -EINVAL; |
1942 | } | |
1943 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1944 | memcpy(buf, page, count); | |
1945 | /* | |
1946 | * Any ALUA target port group alias besides "NULL" means we will be | |
1947 | * making a new group association. | |
1948 | */ | |
1949 | if (strcmp(strstrip(buf), "NULL")) { | |
1950 | /* | |
1951 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1952 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1953 | * core_alua_put_tg_pt_gp_from_name() below. | |
1954 | */ | |
0fd97ccf | 1955 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1956 | strstrip(buf)); |
6708bb27 | 1957 | if (!tg_pt_gp_new) |
c66ac9db NB |
1958 | return -ENODEV; |
1959 | } | |
c66ac9db | 1960 | |
adf653f9 CH |
1961 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1962 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1963 | if (tg_pt_gp) { |
c66ac9db NB |
1964 | /* |
1965 | * Clearing an existing tg_pt_gp association, and replacing | |
1966 | * with the default_tg_pt_gp. | |
1967 | */ | |
6708bb27 AG |
1968 | if (!tg_pt_gp_new) { |
1969 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
1970 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
1971 | " alua/%s, ID: %hu back to" | |
1972 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
1973 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1974 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1975 | config_item_name(&lun->lun_group.cg_item), |
1976 | config_item_name( | |
1977 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
1978 | tg_pt_gp->tg_pt_gp_id); | |
1979 | ||
adf653f9 CH |
1980 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
1981 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 1982 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 1983 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1984 | |
1985 | return count; | |
1986 | } | |
adf653f9 | 1987 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
1988 | move = 1; |
1989 | } | |
adf653f9 CH |
1990 | |
1991 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
1992 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 1993 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 1994 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
1995 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1996 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1997 | config_item_name(&lun->lun_group.cg_item), |
1998 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
1999 | tg_pt_gp_new->tg_pt_gp_id); | |
2000 | ||
2001 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2002 | return count; | |
2003 | } | |
2004 | ||
2005 | ssize_t core_alua_show_access_type( | |
2006 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2007 | char *page) | |
2008 | { | |
125d0119 HR |
2009 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2010 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2011 | return sprintf(page, "Implicit and Explicit\n"); | |
2012 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2013 | return sprintf(page, "Implicit\n"); | |
2014 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2015 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2016 | else |
2017 | return sprintf(page, "None\n"); | |
2018 | } | |
2019 | ||
2020 | ssize_t core_alua_store_access_type( | |
2021 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2022 | const char *page, | |
2023 | size_t count) | |
2024 | { | |
2025 | unsigned long tmp; | |
2026 | int ret; | |
2027 | ||
57103d7f | 2028 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2029 | if (ret < 0) { |
6708bb27 | 2030 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2031 | return ret; |
c66ac9db NB |
2032 | } |
2033 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2034 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2035 | " %lu\n", tmp); |
2036 | return -EINVAL; | |
2037 | } | |
2038 | if (tmp == 3) | |
2039 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2040 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2041 | else if (tmp == 2) |
125d0119 | 2042 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2043 | else if (tmp == 1) |
125d0119 | 2044 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2045 | else |
2046 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2047 | ||
2048 | return count; | |
2049 | } | |
2050 | ||
2051 | ssize_t core_alua_show_nonop_delay_msecs( | |
2052 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2053 | char *page) | |
2054 | { | |
2055 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2056 | } | |
2057 | ||
2058 | ssize_t core_alua_store_nonop_delay_msecs( | |
2059 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2060 | const char *page, | |
2061 | size_t count) | |
2062 | { | |
2063 | unsigned long tmp; | |
2064 | int ret; | |
2065 | ||
57103d7f | 2066 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2067 | if (ret < 0) { |
6708bb27 | 2068 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2069 | return ret; |
c66ac9db NB |
2070 | } |
2071 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2072 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2073 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2074 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2075 | return -EINVAL; | |
2076 | } | |
2077 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2078 | ||
2079 | return count; | |
2080 | } | |
2081 | ||
2082 | ssize_t core_alua_show_trans_delay_msecs( | |
2083 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2084 | char *page) | |
2085 | { | |
2086 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2087 | } | |
2088 | ||
2089 | ssize_t core_alua_store_trans_delay_msecs( | |
2090 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2091 | const char *page, | |
2092 | size_t count) | |
2093 | { | |
2094 | unsigned long tmp; | |
2095 | int ret; | |
2096 | ||
57103d7f | 2097 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2098 | if (ret < 0) { |
6708bb27 | 2099 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2100 | return ret; |
c66ac9db NB |
2101 | } |
2102 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2103 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2104 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2105 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2106 | return -EINVAL; | |
2107 | } | |
2108 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2109 | ||
2110 | return count; | |
2111 | } | |
2112 | ||
125d0119 | 2113 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2114 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2115 | char *page) | |
2116 | { | |
125d0119 | 2117 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2118 | } |
2119 | ||
125d0119 | 2120 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2121 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2122 | const char *page, | |
2123 | size_t count) | |
2124 | { | |
2125 | unsigned long tmp; | |
2126 | int ret; | |
2127 | ||
57103d7f | 2128 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2129 | if (ret < 0) { |
125d0119 | 2130 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2131 | return ret; |
5b9a4d72 | 2132 | } |
125d0119 HR |
2133 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2134 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2135 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2136 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2137 | return -EINVAL; |
2138 | } | |
125d0119 | 2139 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2140 | |
2141 | return count; | |
2142 | } | |
2143 | ||
c66ac9db NB |
2144 | ssize_t core_alua_show_preferred_bit( |
2145 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2146 | char *page) | |
2147 | { | |
2148 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2149 | } | |
2150 | ||
2151 | ssize_t core_alua_store_preferred_bit( | |
2152 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2153 | const char *page, | |
2154 | size_t count) | |
2155 | { | |
2156 | unsigned long tmp; | |
2157 | int ret; | |
2158 | ||
57103d7f | 2159 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2160 | if (ret < 0) { |
6708bb27 | 2161 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2162 | return ret; |
c66ac9db NB |
2163 | } |
2164 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2165 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2166 | return -EINVAL; |
2167 | } | |
2168 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2169 | ||
2170 | return count; | |
2171 | } | |
2172 | ||
2173 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2174 | { | |
c66ac9db | 2175 | return sprintf(page, "%d\n", |
adf653f9 | 2176 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2177 | } |
2178 | ||
2179 | ssize_t core_alua_store_offline_bit( | |
2180 | struct se_lun *lun, | |
2181 | const char *page, | |
2182 | size_t count) | |
2183 | { | |
4cc987ea NB |
2184 | /* |
2185 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2186 | * reference to se_device->dev_group. | |
2187 | */ | |
2188 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2189 | unsigned long tmp; |
2190 | int ret; | |
2191 | ||
530c6891 | 2192 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA || |
adf653f9 | 2193 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
c66ac9db NB |
2194 | return -ENODEV; |
2195 | ||
57103d7f | 2196 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2197 | if (ret < 0) { |
6708bb27 | 2198 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2199 | return ret; |
c66ac9db NB |
2200 | } |
2201 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2202 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2203 | tmp); |
2204 | return -EINVAL; | |
2205 | } | |
c66ac9db | 2206 | |
adf653f9 | 2207 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2208 | if (ret < 0) |
2209 | return -EINVAL; | |
2210 | ||
2211 | return count; | |
2212 | } | |
2213 | ||
2214 | ssize_t core_alua_show_secondary_status( | |
2215 | struct se_lun *lun, | |
2216 | char *page) | |
2217 | { | |
adf653f9 | 2218 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2219 | } |
2220 | ||
2221 | ssize_t core_alua_store_secondary_status( | |
2222 | struct se_lun *lun, | |
2223 | const char *page, | |
2224 | size_t count) | |
2225 | { | |
2226 | unsigned long tmp; | |
2227 | int ret; | |
2228 | ||
57103d7f | 2229 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2230 | if (ret < 0) { |
6708bb27 | 2231 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2232 | return ret; |
c66ac9db NB |
2233 | } |
2234 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2235 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2236 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2237 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2238 | tmp); |
2239 | return -EINVAL; | |
2240 | } | |
adf653f9 | 2241 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2242 | |
2243 | return count; | |
2244 | } | |
2245 | ||
2246 | ssize_t core_alua_show_secondary_write_metadata( | |
2247 | struct se_lun *lun, | |
2248 | char *page) | |
2249 | { | |
adf653f9 | 2250 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2251 | } |
2252 | ||
2253 | ssize_t core_alua_store_secondary_write_metadata( | |
2254 | struct se_lun *lun, | |
2255 | const char *page, | |
2256 | size_t count) | |
2257 | { | |
2258 | unsigned long tmp; | |
2259 | int ret; | |
2260 | ||
57103d7f | 2261 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2262 | if (ret < 0) { |
6708bb27 | 2263 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2264 | return ret; |
c66ac9db NB |
2265 | } |
2266 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2267 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2268 | " %lu\n", tmp); |
2269 | return -EINVAL; | |
2270 | } | |
adf653f9 | 2271 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2272 | |
2273 | return count; | |
2274 | } | |
2275 | ||
0fd97ccf | 2276 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2277 | { |
530c6891 MC |
2278 | if (!(dev->transport->transport_flags & |
2279 | TRANSPORT_FLAG_PASSTHROUGH_ALUA) && | |
c87fbd56 CH |
2280 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2281 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2282 | |
c66ac9db | 2283 | /* |
25985edc | 2284 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2285 | * LUN Group. |
2286 | */ | |
2287 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2288 | if (IS_ERR(lu_gp_mem)) |
2289 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2290 | |
c66ac9db NB |
2291 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2292 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2293 | default_lu_gp); |
c66ac9db NB |
2294 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2295 | ||
6708bb27 | 2296 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2297 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2298 | dev->transport->name); |
c66ac9db NB |
2299 | } |
2300 | ||
2301 | return 0; | |
2302 | } |