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> |
ba929992 | 31 | #include <scsi/scsi_proto.h> |
33395fb8 | 32 | #include <asm/unaligned.h> |
c66ac9db NB |
33 | |
34 | #include <target/target_core_base.h> | |
c4795fb2 CH |
35 | #include <target/target_core_backend.h> |
36 | #include <target/target_core_fabric.h> | |
c66ac9db | 37 | |
e26d99ae | 38 | #include "target_core_internal.h" |
c66ac9db | 39 | #include "target_core_alua.h" |
c66ac9db NB |
40 | #include "target_core_ua.h" |
41 | ||
bb91c1a0 HR |
42 | static sense_reason_t core_alua_check_transition(int state, int valid, |
43 | int *primary); | |
c66ac9db | 44 | static int core_alua_set_tg_pt_secondary_state( |
adf653f9 | 45 | struct se_lun *lun, int explicit, int offline); |
c66ac9db | 46 | |
bb91c1a0 HR |
47 | static char *core_alua_dump_state(int state); |
48 | ||
adf653f9 CH |
49 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
50 | struct t10_alua_tg_pt_gp *tg_pt_gp); | |
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 | 149 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
adf653f9 | 150 | struct se_lun *lun; |
05d1c7c0 | 151 | unsigned char *buf; |
5b9a4d72 NB |
152 | u32 rd_len = 0, off; |
153 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 154 | |
6b20fa9a | 155 | /* |
5b9a4d72 NB |
156 | * Skip over RESERVED area to first Target port group descriptor |
157 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 158 | */ |
5b9a4d72 NB |
159 | if (ext_hdr != 0) |
160 | off = 8; | |
161 | else | |
162 | off = 4; | |
163 | ||
164 | if (cmd->data_length < off) { | |
165 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
166 | " small for %s header\n", cmd->data_length, | |
167 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 168 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 169 | } |
4949314c | 170 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
171 | if (!buf) |
172 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 173 | |
0fd97ccf CH |
174 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
175 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 176 | tg_pt_gp_list) { |
6b20fa9a NB |
177 | /* |
178 | * Check if the Target port group and Target port descriptor list | |
179 | * based on tg_pt_gp_members count will fit into the response payload. | |
180 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
181 | * the allocation length and the response is truncated. | |
182 | */ | |
183 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
184 | cmd->data_length) { | |
185 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
186 | continue; | |
187 | } | |
c66ac9db NB |
188 | /* |
189 | * PREF: Preferred target port bit, determine if this | |
190 | * bit should be set for port group. | |
191 | */ | |
192 | if (tg_pt_gp->tg_pt_gp_pref) | |
193 | buf[off] = 0x80; | |
194 | /* | |
195 | * Set the ASYMMETRIC ACCESS State | |
196 | */ | |
197 | buf[off++] |= (atomic_read( | |
198 | &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff); | |
199 | /* | |
200 | * Set supported ASYMMETRIC ACCESS State bits | |
201 | */ | |
c0dc941e | 202 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
203 | /* |
204 | * TARGET PORT GROUP | |
205 | */ | |
206 | buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff); | |
207 | buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff); | |
208 | ||
209 | off++; /* Skip over Reserved */ | |
210 | /* | |
211 | * STATUS CODE | |
212 | */ | |
213 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
214 | /* | |
215 | * Vendor Specific field | |
216 | */ | |
217 | buf[off++] = 0x00; | |
218 | /* | |
219 | * TARGET PORT COUNT | |
220 | */ | |
221 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
222 | rd_len += 8; | |
223 | ||
224 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
225 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
226 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
227 | /* |
228 | * Start Target Port descriptor format | |
229 | * | |
230 | * See spc4r17 section 6.2.7 Table 247 | |
231 | */ | |
232 | off += 2; /* Skip over Obsolete */ | |
233 | /* | |
234 | * Set RELATIVE TARGET PORT IDENTIFIER | |
235 | */ | |
adf653f9 CH |
236 | buf[off++] = ((lun->lun_rtpi >> 8) & 0xff); |
237 | buf[off++] = (lun->lun_rtpi & 0xff); | |
c66ac9db NB |
238 | rd_len += 4; |
239 | } | |
240 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
241 | } | |
0fd97ccf | 242 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
243 | /* |
244 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
245 | */ | |
5b9a4d72 | 246 | put_unaligned_be32(rd_len, &buf[0]); |
c66ac9db | 247 | |
5b9a4d72 NB |
248 | /* |
249 | * Fill in the Extended header parameter data format if requested | |
250 | */ | |
251 | if (ext_hdr != 0) { | |
252 | buf[4] = 0x10; | |
253 | /* | |
125d0119 | 254 | * Set the implicit transition time (in seconds) for the application |
5b9a4d72 NB |
255 | * client to use as a base for it's transition timeout value. |
256 | * | |
257 | * Use the current tg_pt_gp_mem -> tg_pt_gp membership from the LUN | |
258 | * this CDB was received upon to determine this value individually | |
259 | * for ALUA target port group. | |
260 | */ | |
adf653f9 CH |
261 | spin_lock(&cmd->se_lun->lun_tg_pt_gp_lock); |
262 | tg_pt_gp = cmd->se_lun->lun_tg_pt_gp; | |
263 | if (tg_pt_gp) | |
264 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; | |
265 | spin_unlock(&cmd->se_lun->lun_tg_pt_gp_lock); | |
5b9a4d72 | 266 | } |
4949314c | 267 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 268 | |
6bb35e00 | 269 | target_complete_cmd(cmd, GOOD); |
c66ac9db NB |
270 | return 0; |
271 | } | |
272 | ||
273 | /* | |
125d0119 | 274 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
275 | * |
276 | * See spc4r17 section 6.35 | |
277 | */ | |
de103c93 CH |
278 | sense_reason_t |
279 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 280 | { |
5951146d | 281 | struct se_device *dev = cmd->se_dev; |
adf653f9 | 282 | struct se_lun *l_lun = cmd->se_lun; |
e3d6f909 | 283 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; |
c66ac9db | 284 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
05d1c7c0 AG |
285 | unsigned char *buf; |
286 | unsigned char *ptr; | |
a0d50f62 | 287 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 288 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 289 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
290 | u16 tg_pt_id, rtpi; |
291 | ||
0d7f1299 PB |
292 | if (cmd->data_length < 4) { |
293 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
294 | " small\n", cmd->data_length); | |
de103c93 | 295 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
296 | } |
297 | ||
4949314c | 298 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
299 | if (!buf) |
300 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 301 | |
c66ac9db | 302 | /* |
125d0119 | 303 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
304 | * for the local tg_pt_gp. |
305 | */ | |
adf653f9 CH |
306 | spin_lock(&l_lun->lun_tg_pt_gp_lock); |
307 | l_tg_pt_gp = l_lun->lun_tg_pt_gp; | |
6708bb27 | 308 | if (!l_tg_pt_gp) { |
adf653f9 CH |
309 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
310 | pr_err("Unable to access l_lun->tg_pt_gp\n"); | |
de103c93 | 311 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 312 | goto out; |
c66ac9db | 313 | } |
c66ac9db | 314 | |
125d0119 | 315 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
adf653f9 | 316 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
6708bb27 | 317 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 318 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 319 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 320 | goto out; |
c66ac9db | 321 | } |
bb91c1a0 | 322 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
adf653f9 | 323 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
c66ac9db | 324 | |
05d1c7c0 AG |
325 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
326 | ||
c66ac9db | 327 | while (len < cmd->data_length) { |
de103c93 | 328 | bool found = false; |
c66ac9db NB |
329 | alua_access_state = (ptr[0] & 0x0f); |
330 | /* | |
331 | * Check the received ALUA access state, and determine if | |
332 | * the state is a primary or secondary target port asymmetric | |
333 | * access state. | |
334 | */ | |
bb91c1a0 HR |
335 | rc = core_alua_check_transition(alua_access_state, |
336 | valid_states, &primary); | |
de103c93 | 337 | if (rc) { |
c66ac9db NB |
338 | /* |
339 | * If the SET TARGET PORT GROUPS attempts to establish | |
340 | * an invalid combination of target port asymmetric | |
341 | * access states or attempts to establish an | |
342 | * unsupported target port asymmetric access state, | |
343 | * then the command shall be terminated with CHECK | |
344 | * CONDITION status, with the sense key set to ILLEGAL | |
345 | * REQUEST, and the additional sense code set to INVALID | |
346 | * FIELD IN PARAMETER LIST. | |
347 | */ | |
05d1c7c0 | 348 | goto out; |
c66ac9db | 349 | } |
de103c93 | 350 | |
c66ac9db NB |
351 | /* |
352 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
353 | * specifies a primary target port asymmetric access state, | |
354 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
355 | * a primary target port group for which the primary target | |
356 | * port asymmetric access state shall be changed. If the | |
357 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
358 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
359 | * TARGET PORT field specifies the relative target port | |
360 | * identifier (see 3.1.120) of the target port for which the | |
361 | * secondary target port asymmetric access state shall be | |
362 | * changed. | |
363 | */ | |
364 | if (primary) { | |
33395fb8 | 365 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
366 | /* |
367 | * Locate the matching target port group ID from | |
368 | * the global tg_pt_gp list | |
369 | */ | |
0fd97ccf | 370 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 371 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 372 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 373 | tg_pt_gp_list) { |
6708bb27 | 374 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
375 | continue; |
376 | ||
377 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
378 | continue; | |
379 | ||
33940d09 | 380 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
de103c93 | 381 | |
0fd97ccf | 382 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 383 | |
de103c93 | 384 | if (!core_alua_do_port_transition(tg_pt_gp, |
adf653f9 | 385 | dev, l_lun, nacl, |
de103c93 CH |
386 | alua_access_state, 1)) |
387 | found = true; | |
c66ac9db | 388 | |
0fd97ccf | 389 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 390 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
c66ac9db NB |
391 | break; |
392 | } | |
0fd97ccf | 393 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 394 | } else { |
adf653f9 CH |
395 | struct se_lun *lun; |
396 | ||
c66ac9db | 397 | /* |
f1ae05d5 | 398 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
399 | * the Target Port in question for the the incoming |
400 | * SET_TARGET_PORT_GROUPS op. | |
401 | */ | |
33395fb8 | 402 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 403 | /* |
35d1efe8 | 404 | * Locate the matching relative target port identifier |
c66ac9db NB |
405 | * for the struct se_device storage object. |
406 | */ | |
407 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
408 | list_for_each_entry(lun, &dev->dev_sep_list, |
409 | lun_dev_link) { | |
410 | if (lun->lun_rtpi != rtpi) | |
c66ac9db NB |
411 | continue; |
412 | ||
adf653f9 | 413 | // XXX: racy unlock |
c66ac9db NB |
414 | spin_unlock(&dev->se_port_lock); |
415 | ||
de103c93 | 416 | if (!core_alua_set_tg_pt_secondary_state( |
adf653f9 | 417 | lun, 1, 1)) |
de103c93 | 418 | found = true; |
c66ac9db NB |
419 | |
420 | spin_lock(&dev->se_port_lock); | |
421 | break; | |
422 | } | |
423 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
424 | } |
425 | ||
426 | if (!found) { | |
427 | rc = TCM_INVALID_PARAMETER_LIST; | |
428 | goto out; | |
c66ac9db NB |
429 | } |
430 | ||
431 | ptr += 4; | |
432 | len += 4; | |
433 | } | |
434 | ||
05d1c7c0 | 435 | out: |
4949314c | 436 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
437 | if (!rc) |
438 | target_complete_cmd(cmd, GOOD); | |
439 | return rc; | |
c66ac9db NB |
440 | } |
441 | ||
1e3ab99d PB |
442 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
443 | { | |
444 | /* | |
445 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
446 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
447 | * by the ALUA primary or secondary access state.. | |
448 | */ | |
449 | pr_debug("[%s]: ALUA TG Port not available, " | |
450 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
451 | "0x04/0x%02x\n", | |
452 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
453 | ||
454 | cmd->scsi_asc = 0x04; | |
455 | cmd->scsi_ascq = alua_ascq; | |
456 | } | |
457 | ||
458 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
459 | struct se_cmd *cmd, |
460 | unsigned char *cdb, | |
1e3ab99d | 461 | int nonop_delay_msecs) |
c66ac9db NB |
462 | { |
463 | /* | |
464 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
465 | * later to determine if processing of this cmd needs to be | |
466 | * temporarily delayed for the Active/NonOptimized primary access state. | |
467 | */ | |
468 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
469 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
470 | } |
471 | ||
c66094bf HR |
472 | static inline int core_alua_state_lba_dependent( |
473 | struct se_cmd *cmd, | |
1e3ab99d | 474 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
475 | { |
476 | struct se_device *dev = cmd->se_dev; | |
477 | u64 segment_size, segment_mult, sectors, lba; | |
478 | ||
479 | /* Only need to check for cdb actually containing LBAs */ | |
480 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
481 | return 0; | |
482 | ||
483 | spin_lock(&dev->t10_alua.lba_map_lock); | |
484 | segment_size = dev->t10_alua.lba_map_segment_size; | |
485 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
486 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
487 | ||
488 | lba = cmd->t_task_lba; | |
489 | while (lba < cmd->t_task_lba + sectors) { | |
490 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
491 | struct t10_alua_lba_map_member *map_mem; | |
492 | ||
493 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
494 | lba_map_list) { | |
495 | u64 start_lba, last_lba; | |
496 | u64 first_lba = map->lba_map_first_lba; | |
497 | ||
498 | if (segment_mult) { | |
499 | u64 tmp = lba; | |
cdf55949 | 500 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
501 | |
502 | last_lba = first_lba + segment_size - 1; | |
503 | if (start_lba >= first_lba && | |
504 | start_lba <= last_lba) { | |
505 | lba += segment_size; | |
506 | cur_map = map; | |
507 | break; | |
508 | } | |
509 | } else { | |
510 | last_lba = map->lba_map_last_lba; | |
511 | if (lba >= first_lba && lba <= last_lba) { | |
512 | lba = last_lba + 1; | |
513 | cur_map = map; | |
514 | break; | |
515 | } | |
516 | } | |
517 | } | |
518 | if (!cur_map) { | |
519 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 520 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
521 | return 1; |
522 | } | |
523 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
524 | lba_map_mem_list) { | |
525 | if (map_mem->lba_map_mem_alua_pg_id != | |
526 | tg_pt_gp->tg_pt_gp_id) | |
527 | continue; | |
528 | switch(map_mem->lba_map_mem_alua_state) { | |
529 | case ALUA_ACCESS_STATE_STANDBY: | |
530 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 531 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
532 | return 1; |
533 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
534 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 535 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
536 | return 1; |
537 | default: | |
538 | break; | |
539 | } | |
540 | } | |
541 | } | |
542 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
543 | return 0; | |
544 | } | |
545 | ||
c66ac9db NB |
546 | static inline int core_alua_state_standby( |
547 | struct se_cmd *cmd, | |
1e3ab99d | 548 | unsigned char *cdb) |
c66ac9db NB |
549 | { |
550 | /* | |
551 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
552 | * spc4r17 section 5.9.2.4.4 | |
553 | */ | |
554 | switch (cdb[0]) { | |
555 | case INQUIRY: | |
556 | case LOG_SELECT: | |
557 | case LOG_SENSE: | |
558 | case MODE_SELECT: | |
559 | case MODE_SENSE: | |
560 | case REPORT_LUNS: | |
561 | case RECEIVE_DIAGNOSTIC: | |
562 | case SEND_DIAGNOSTIC: | |
e7810c2d | 563 | case READ_CAPACITY: |
30f359a6 | 564 | return 0; |
eb846d9f | 565 | case SERVICE_ACTION_IN_16: |
e7810c2d NB |
566 | switch (cdb[1] & 0x1f) { |
567 | case SAI_READ_CAPACITY_16: | |
568 | return 0; | |
569 | default: | |
570 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); | |
571 | return 1; | |
572 | } | |
c66ac9db | 573 | case MAINTENANCE_IN: |
ba539743 | 574 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
575 | case MI_REPORT_TARGET_PGS: |
576 | return 0; | |
577 | default: | |
1e3ab99d | 578 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
579 | return 1; |
580 | } | |
581 | case MAINTENANCE_OUT: | |
582 | switch (cdb[1]) { | |
583 | case MO_SET_TARGET_PGS: | |
584 | return 0; | |
585 | default: | |
1e3ab99d | 586 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
587 | return 1; |
588 | } | |
589 | case REQUEST_SENSE: | |
590 | case PERSISTENT_RESERVE_IN: | |
591 | case PERSISTENT_RESERVE_OUT: | |
592 | case READ_BUFFER: | |
593 | case WRITE_BUFFER: | |
594 | return 0; | |
595 | default: | |
1e3ab99d | 596 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
597 | return 1; |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | static inline int core_alua_state_unavailable( | |
604 | struct se_cmd *cmd, | |
1e3ab99d | 605 | unsigned char *cdb) |
c66ac9db NB |
606 | { |
607 | /* | |
608 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
609 | * spc4r17 section 5.9.2.4.5 | |
610 | */ | |
611 | switch (cdb[0]) { | |
612 | case INQUIRY: | |
613 | case REPORT_LUNS: | |
30f359a6 | 614 | return 0; |
c66ac9db | 615 | case MAINTENANCE_IN: |
ba539743 | 616 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
617 | case MI_REPORT_TARGET_PGS: |
618 | return 0; | |
619 | default: | |
1e3ab99d | 620 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
621 | return 1; |
622 | } | |
623 | case MAINTENANCE_OUT: | |
624 | switch (cdb[1]) { | |
625 | case MO_SET_TARGET_PGS: | |
626 | return 0; | |
627 | default: | |
1e3ab99d | 628 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
629 | return 1; |
630 | } | |
631 | case REQUEST_SENSE: | |
632 | case READ_BUFFER: | |
633 | case WRITE_BUFFER: | |
634 | return 0; | |
635 | default: | |
1e3ab99d | 636 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
637 | return 1; |
638 | } | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | static inline int core_alua_state_transition( | |
644 | struct se_cmd *cmd, | |
1e3ab99d | 645 | unsigned char *cdb) |
c66ac9db NB |
646 | { |
647 | /* | |
f1ae05d5 | 648 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
649 | * spc4r17 section 5.9.2.5 |
650 | */ | |
651 | switch (cdb[0]) { | |
652 | case INQUIRY: | |
653 | case REPORT_LUNS: | |
30f359a6 | 654 | return 0; |
c66ac9db | 655 | case MAINTENANCE_IN: |
ba539743 | 656 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
657 | case MI_REPORT_TARGET_PGS: |
658 | return 0; | |
659 | default: | |
1e3ab99d | 660 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
661 | return 1; |
662 | } | |
663 | case REQUEST_SENSE: | |
664 | case READ_BUFFER: | |
665 | case WRITE_BUFFER: | |
666 | return 0; | |
667 | default: | |
1e3ab99d | 668 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
669 | return 1; |
670 | } | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
675 | /* | |
f1ae05d5 | 676 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 677 | * return 0: Used to signal success |
f1ae05d5 | 678 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 679 | */ |
de103c93 CH |
680 | sense_reason_t |
681 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 682 | { |
c87fbd56 CH |
683 | struct se_device *dev = cmd->se_dev; |
684 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 685 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 686 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db | 687 | int out_alua_state, nonop_delay_msecs; |
c87fbd56 CH |
688 | |
689 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
690 | return 0; | |
a3541703 | 691 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
c87fbd56 | 692 | return 0; |
c66ac9db | 693 | |
c66ac9db NB |
694 | /* |
695 | * First, check for a struct se_port specific secondary ALUA target port | |
696 | * access state: OFFLINE | |
697 | */ | |
adf653f9 | 698 | if (atomic_read(&lun->lun_tg_pt_secondary_offline)) { |
6708bb27 | 699 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 700 | " target port\n"); |
1e3ab99d PB |
701 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
702 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db | 703 | } |
adf653f9 CH |
704 | |
705 | if (!lun->lun_tg_pt_gp) | |
89c12cc9 NB |
706 | return 0; |
707 | ||
adf653f9 CH |
708 | spin_lock(&lun->lun_tg_pt_gp_lock); |
709 | tg_pt_gp = lun->lun_tg_pt_gp; | |
c66ac9db NB |
710 | out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); |
711 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; | |
adf653f9 CH |
712 | |
713 | // XXX: keeps using tg_pt_gp witout reference after unlock | |
714 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db | 715 | /* |
73f3bf51 | 716 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 717 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
718 | * For the Optimized ALUA access state case, we want to process the |
719 | * incoming fabric cmd ASAP.. | |
720 | */ | |
73f3bf51 | 721 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
722 | return 0; |
723 | ||
724 | switch (out_alua_state) { | |
725 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 726 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 727 | break; |
c66ac9db | 728 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
729 | if (core_alua_state_standby(cmd, cdb)) |
730 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 731 | break; |
c66ac9db | 732 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
733 | if (core_alua_state_unavailable(cmd, cdb)) |
734 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 735 | break; |
c66ac9db | 736 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
737 | if (core_alua_state_transition(cmd, cdb)) |
738 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 739 | break; |
c66094bf | 740 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
741 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
742 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 743 | break; |
c66ac9db NB |
744 | /* |
745 | * OFFLINE is a secondary ALUA target port group access state, that is | |
adf653f9 | 746 | * handled above with struct se_lun->lun_tg_pt_secondary_offline=1 |
c66ac9db NB |
747 | */ |
748 | case ALUA_ACCESS_STATE_OFFLINE: | |
749 | default: | |
6708bb27 | 750 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 751 | out_alua_state); |
de103c93 | 752 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
753 | } |
754 | ||
de103c93 | 755 | return 0; |
c66ac9db NB |
756 | } |
757 | ||
758 | /* | |
125d0119 | 759 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 760 | */ |
de103c93 | 761 | static sense_reason_t |
bb91c1a0 | 762 | core_alua_check_transition(int state, int valid, int *primary) |
c66ac9db | 763 | { |
bb91c1a0 HR |
764 | /* |
765 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
766 | * defined as primary target port asymmetric access states. | |
767 | */ | |
c66ac9db | 768 | switch (state) { |
73f3bf51 | 769 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
770 | if (!(valid & ALUA_AO_SUP)) |
771 | goto not_supported; | |
772 | *primary = 1; | |
773 | break; | |
c66ac9db | 774 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
775 | if (!(valid & ALUA_AN_SUP)) |
776 | goto not_supported; | |
777 | *primary = 1; | |
778 | break; | |
c66ac9db | 779 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
780 | if (!(valid & ALUA_S_SUP)) |
781 | goto not_supported; | |
782 | *primary = 1; | |
783 | break; | |
c66ac9db | 784 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
785 | if (!(valid & ALUA_U_SUP)) |
786 | goto not_supported; | |
c66ac9db NB |
787 | *primary = 1; |
788 | break; | |
c66094bf HR |
789 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
790 | if (!(valid & ALUA_LBD_SUP)) | |
791 | goto not_supported; | |
792 | *primary = 1; | |
793 | break; | |
c66ac9db NB |
794 | case ALUA_ACCESS_STATE_OFFLINE: |
795 | /* | |
796 | * OFFLINE state is defined as a secondary target port | |
797 | * asymmetric access state. | |
798 | */ | |
bb91c1a0 HR |
799 | if (!(valid & ALUA_O_SUP)) |
800 | goto not_supported; | |
c66ac9db NB |
801 | *primary = 0; |
802 | break; | |
bb91c1a0 HR |
803 | case ALUA_ACCESS_STATE_TRANSITION: |
804 | /* | |
805 | * Transitioning is set internally, and | |
806 | * cannot be selected manually. | |
807 | */ | |
808 | goto not_supported; | |
c66ac9db | 809 | default: |
6708bb27 | 810 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 811 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
812 | } |
813 | ||
814 | return 0; | |
bb91c1a0 HR |
815 | |
816 | not_supported: | |
817 | pr_err("ALUA access state %s not supported", | |
818 | core_alua_dump_state(state)); | |
819 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
820 | } |
821 | ||
822 | static char *core_alua_dump_state(int state) | |
823 | { | |
824 | switch (state) { | |
73f3bf51 | 825 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
826 | return "Active/Optimized"; |
827 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
828 | return "Active/NonOptimized"; | |
c66094bf HR |
829 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
830 | return "LBA Dependent"; | |
c66ac9db NB |
831 | case ALUA_ACCESS_STATE_STANDBY: |
832 | return "Standby"; | |
833 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
834 | return "Unavailable"; | |
835 | case ALUA_ACCESS_STATE_OFFLINE: | |
836 | return "Offline"; | |
bb91c1a0 HR |
837 | case ALUA_ACCESS_STATE_TRANSITION: |
838 | return "Transitioning"; | |
c66ac9db NB |
839 | default: |
840 | return "Unknown"; | |
841 | } | |
842 | ||
843 | return NULL; | |
844 | } | |
845 | ||
846 | char *core_alua_dump_status(int status) | |
847 | { | |
848 | switch (status) { | |
849 | case ALUA_STATUS_NONE: | |
850 | return "None"; | |
125d0119 HR |
851 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
852 | return "Altered by Explicit STPG"; | |
853 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
854 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
855 | default: |
856 | return "Unknown"; | |
857 | } | |
858 | ||
859 | return NULL; | |
860 | } | |
861 | ||
862 | /* | |
863 | * Used by fabric modules to determine when we need to delay processing | |
864 | * for the Active/NonOptimized paths.. | |
865 | */ | |
866 | int core_alua_check_nonop_delay( | |
867 | struct se_cmd *cmd) | |
868 | { | |
869 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
870 | return 0; | |
871 | if (in_interrupt()) | |
872 | return 0; | |
873 | /* | |
874 | * The ALUA Active/NonOptimized access state delay can be disabled | |
875 | * in via configfs with a value of zero | |
876 | */ | |
6708bb27 | 877 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
878 | return 0; |
879 | /* | |
880 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
881 | * defined interval in core_alua_state_nonoptimized() | |
882 | */ | |
883 | msleep_interruptible(cmd->alua_nonop_delay); | |
884 | return 0; | |
885 | } | |
886 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
887 | ||
c66ac9db NB |
888 | static int core_alua_write_tpg_metadata( |
889 | const char *path, | |
890 | unsigned char *md_buf, | |
891 | u32 md_buf_len) | |
892 | { | |
0e9b10a9 AV |
893 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
894 | int ret; | |
c66ac9db | 895 | |
0e9b10a9 AV |
896 | if (IS_ERR(file)) { |
897 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
898 | return -ENODEV; |
899 | } | |
0e9b10a9 AV |
900 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
901 | if (ret < 0) | |
6708bb27 | 902 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 903 | fput(file); |
f730f915 | 904 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
905 | } |
906 | ||
907 | /* | |
908 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held | |
909 | */ | |
910 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 911 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 912 | { |
1e0b9403 | 913 | unsigned char *md_buf; |
0fd97ccf | 914 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
c66ac9db | 915 | char path[ALUA_METADATA_PATH_LEN]; |
1e0b9403 HR |
916 | int len, rc; |
917 | ||
918 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
919 | if (!md_buf) { | |
920 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
921 | return -ENOMEM; | |
922 | } | |
c66ac9db NB |
923 | |
924 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
925 | ||
1e0b9403 | 926 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
927 | "tg_pt_gp_id=%hu\n" |
928 | "alua_access_state=0x%02x\n" | |
929 | "alua_access_status=0x%02x\n", | |
9c6e164c HR |
930 | tg_pt_gp->tg_pt_gp_id, |
931 | tg_pt_gp->tg_pt_gp_alua_pending_state, | |
c66ac9db NB |
932 | tg_pt_gp->tg_pt_gp_alua_access_status); |
933 | ||
934 | snprintf(path, ALUA_METADATA_PATH_LEN, | |
935 | "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0], | |
936 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); | |
937 | ||
1e0b9403 HR |
938 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
939 | kfree(md_buf); | |
940 | return rc; | |
c66ac9db NB |
941 | } |
942 | ||
ee8c07d0 | 943 | static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db NB |
944 | { |
945 | struct se_dev_entry *se_deve; | |
adf653f9 | 946 | struct se_lun *lun; |
c66ac9db | 947 | struct se_lun_acl *lacl; |
c66ac9db NB |
948 | |
949 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
950 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
951 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
952 | /* |
953 | * After an implicit target port asymmetric access state | |
954 | * change, a device server shall establish a unit attention | |
955 | * condition for the initiator port associated with every I_T | |
956 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 957 | * ACCESS STATE CHANGED. |
c66ac9db NB |
958 | * |
959 | * After an explicit target port asymmetric access state | |
960 | * change, a device server shall establish a unit attention | |
961 | * condition with the additional sense code set to ASYMMETRIC | |
962 | * ACCESS STATE CHANGED for the initiator port associated with | |
963 | * every I_T nexus other than the I_T nexus on which the SET | |
964 | * TARGET PORT GROUPS command | |
965 | */ | |
9e37d042 NB |
966 | if (!percpu_ref_tryget_live(&lun->lun_ref)) |
967 | continue; | |
c66ac9db NB |
968 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
969 | ||
1adff1b3 | 970 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 971 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) { |
29a05dee | 972 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
adf653f9 | 973 | lockdep_is_held(&lun->lun_deve_lock)); |
c51c8e7b | 974 | |
c66ac9db | 975 | /* |
c51c8e7b HR |
976 | * spc4r37 p.242: |
977 | * After an explicit target port asymmetric access | |
978 | * state change, a device server shall establish a | |
979 | * unit attention condition with the additional sense | |
980 | * code set to ASYMMETRIC ACCESS STATE CHANGED for | |
981 | * the initiator port associated with every I_T nexus | |
982 | * other than the I_T nexus on which the SET TARGET | |
983 | * PORT GROUPS command was received. | |
c66ac9db | 984 | */ |
9c6e164c HR |
985 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
986 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
adf653f9 CH |
987 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
988 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
989 | continue; |
990 | ||
c51c8e7b HR |
991 | /* |
992 | * se_deve->se_lun_acl pointer may be NULL for a | |
993 | * entry created without explicit Node+MappedLUN ACLs | |
994 | */ | |
995 | if (lacl && (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
996 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl)) | |
997 | continue; | |
998 | ||
999 | core_scsi3_ua_allocate(se_deve, 0x2A, | |
c66ac9db NB |
1000 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); |
1001 | } | |
1adff1b3 | 1002 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db NB |
1003 | |
1004 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 1005 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
1006 | } |
1007 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
ee8c07d0 HR |
1008 | } |
1009 | ||
1010 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) | |
1011 | { | |
1012 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, | |
1013 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work); | |
1014 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1015 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == | |
1016 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
1017 | ||
c66ac9db NB |
1018 | /* |
1019 | * Update the ALUA metadata buf that has been allocated in | |
1020 | * core_alua_do_port_transition(), this metadata will be written | |
1021 | * to struct file. | |
1022 | * | |
1023 | * Note that there is the case where we do not want to update the | |
1024 | * metadata when the saved metadata is being parsed in userspace | |
1025 | * when setting the existing port access state and access status. | |
1026 | * | |
1027 | * Also note that the failure to write out the ALUA metadata to | |
1028 | * struct file does NOT affect the actual ALUA transition. | |
1029 | */ | |
1030 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1031 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1032 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1033 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1034 | } | |
1035 | /* | |
1036 | * Set the current primary ALUA access state to the requested new state | |
1037 | */ | |
dfbce75a HR |
1038 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1039 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1040 | |
6708bb27 | 1041 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1042 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1043 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1044 | tg_pt_gp->tg_pt_gp_id, |
1045 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1046 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
ee8c07d0 HR |
1047 | |
1048 | core_alua_queue_state_change_ua(tg_pt_gp); | |
1049 | ||
9c6e164c HR |
1050 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1051 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1052 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1053 | ||
1054 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1055 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1056 | } | |
1057 | ||
1058 | static int core_alua_do_transition_tg_pt( | |
1059 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1060 | int new_state, | |
1061 | int explicit) | |
1062 | { | |
1063 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1064 | DECLARE_COMPLETION_ONSTACK(wait); | |
1065 | ||
1066 | /* Nothing to be done here */ | |
1067 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1068 | return 0; | |
1069 | ||
1070 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) | |
1071 | return -EAGAIN; | |
1072 | ||
1073 | /* | |
1074 | * Flush any pending transitions | |
1075 | */ | |
1076 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs && | |
1077 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == | |
1078 | ALUA_ACCESS_STATE_TRANSITION) { | |
1079 | /* Just in case */ | |
1080 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1081 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1082 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); | |
1083 | wait_for_completion(&wait); | |
1084 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * Save the old primary ALUA access state, and set the current state | |
1090 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1091 | */ | |
1092 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1093 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1094 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1095 | ||
1096 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, | |
1097 | ALUA_ACCESS_STATE_TRANSITION); | |
1098 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1099 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1100 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1101 | ||
ee8c07d0 HR |
1102 | core_alua_queue_state_change_ua(tg_pt_gp); |
1103 | ||
9c6e164c HR |
1104 | /* |
1105 | * Check for the optional ALUA primary state transition delay | |
1106 | */ | |
1107 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1108 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1109 | ||
1110 | /* | |
1111 | * Take a reference for workqueue item | |
1112 | */ | |
1113 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1114 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1115 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1116 | ||
1117 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) { | |
1118 | unsigned long transition_tmo; | |
1119 | ||
1120 | transition_tmo = tg_pt_gp->tg_pt_gp_implicit_trans_secs * HZ; | |
1121 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1122 | &tg_pt_gp->tg_pt_gp_transition_work, | |
1123 | transition_tmo); | |
1124 | } else { | |
1125 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1126 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1127 | &tg_pt_gp->tg_pt_gp_transition_work, 0); | |
1128 | wait_for_completion(&wait); | |
1129 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1130 | } | |
c66ac9db NB |
1131 | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | int core_alua_do_port_transition( | |
1136 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1137 | struct se_device *l_dev, | |
adf653f9 | 1138 | struct se_lun *l_lun, |
c66ac9db NB |
1139 | struct se_node_acl *l_nacl, |
1140 | int new_state, | |
125d0119 | 1141 | int explicit) |
c66ac9db NB |
1142 | { |
1143 | struct se_device *dev; | |
c66ac9db NB |
1144 | struct t10_alua_lu_gp *lu_gp; |
1145 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1146 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1147 | int primary, valid_states, rc = 0; |
c66ac9db | 1148 | |
bb91c1a0 HR |
1149 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1150 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) | |
c66ac9db NB |
1151 | return -EINVAL; |
1152 | ||
c66ac9db NB |
1153 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1154 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1155 | lu_gp = local_lu_gp_mem->lu_gp; | |
1156 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1157 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1158 | /* | |
1159 | * For storage objects that are members of the 'default_lu_gp', | |
1160 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1161 | * on all of the matching target port groups IDs in default_lu_gp. | |
1162 | */ | |
6708bb27 | 1163 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1164 | /* |
1165 | * core_alua_do_transition_tg_pt() will always return | |
1166 | * success. | |
1167 | */ | |
adf653f9 | 1168 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1169 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1170 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1171 | new_state, explicit); | |
33940d09 | 1172 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1173 | return rc; |
c66ac9db NB |
1174 | } |
1175 | /* | |
1176 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1177 | * the associated storage objects looking for a matching target port | |
1178 | * group ID from the local target port group. | |
1179 | */ | |
1180 | spin_lock(&lu_gp->lu_gp_lock); | |
1181 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1182 | lu_gp_mem_list) { | |
1183 | ||
1184 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1185 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1186 | spin_unlock(&lu_gp->lu_gp_lock); |
1187 | ||
0fd97ccf | 1188 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1189 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1190 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1191 | tg_pt_gp_list) { |
1192 | ||
6708bb27 | 1193 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1194 | continue; |
1195 | /* | |
1196 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1197 | * is changed for any target port group accessible via |
c66ac9db NB |
1198 | * a logical unit within a LU group, the target port |
1199 | * behavior group asymmetric access states for the same | |
1200 | * target port group accessible via other logical units | |
1201 | * in that LU group will also change. | |
1202 | */ | |
1203 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1204 | continue; | |
1205 | ||
1206 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1207 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1208 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1209 | } else { |
adf653f9 | 1210 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1211 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1212 | } |
33940d09 | 1213 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1214 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1215 | /* |
1216 | * core_alua_do_transition_tg_pt() will always return | |
1217 | * success. | |
1218 | */ | |
9c6e164c HR |
1219 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1220 | new_state, explicit); | |
c66ac9db | 1221 | |
0fd97ccf | 1222 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1223 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1224 | if (rc) |
1225 | break; | |
c66ac9db | 1226 | } |
0fd97ccf | 1227 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1228 | |
1229 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1230 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1231 | } |
1232 | spin_unlock(&lu_gp->lu_gp_lock); | |
1233 | ||
9c6e164c HR |
1234 | if (!rc) { |
1235 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1236 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1237 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1238 | l_tg_pt_gp->tg_pt_gp_id, | |
1239 | (explicit) ? "explicit" : "implicit", | |
1240 | core_alua_dump_state(new_state)); | |
1241 | } | |
c66ac9db | 1242 | |
33940d09 | 1243 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1244 | return rc; |
c66ac9db NB |
1245 | } |
1246 | ||
adf653f9 | 1247 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1248 | { |
adf653f9 | 1249 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1250 | unsigned char *md_buf; |
c66ac9db | 1251 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; |
1e0b9403 HR |
1252 | int len, rc; |
1253 | ||
adf653f9 CH |
1254 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1255 | ||
1e0b9403 HR |
1256 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1257 | if (!md_buf) { | |
1258 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1259 | rc = -ENOMEM; |
1260 | goto out_unlock; | |
1e0b9403 | 1261 | } |
c66ac9db NB |
1262 | |
1263 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1264 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1265 | ||
1266 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1267 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1268 | |
e3d6f909 | 1269 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1270 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1271 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1272 | |
1e0b9403 | 1273 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1274 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1275 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1276 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1277 | |
f2d30680 | 1278 | snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%llu", |
e3d6f909 | 1279 | se_tpg->se_tpg_tfo->get_fabric_name(), wwn, |
adf653f9 | 1280 | lun->unpacked_lun); |
c66ac9db | 1281 | |
1e0b9403 HR |
1282 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1283 | kfree(md_buf); | |
1284 | ||
adf653f9 CH |
1285 | out_unlock: |
1286 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1287 | return rc; |
c66ac9db NB |
1288 | } |
1289 | ||
1290 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1291 | struct se_lun *lun, |
125d0119 | 1292 | int explicit, |
c66ac9db NB |
1293 | int offline) |
1294 | { | |
1295 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1296 | int trans_delay_msecs; |
1297 | ||
adf653f9 CH |
1298 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1299 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1300 | if (!tg_pt_gp) { |
adf653f9 | 1301 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1302 | pr_err("Unable to complete secondary state" |
c66ac9db | 1303 | " transition\n"); |
e3d6f909 | 1304 | return -EINVAL; |
c66ac9db NB |
1305 | } |
1306 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1307 | /* | |
1308 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1309 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1310 | */ |
1311 | if (offline) | |
adf653f9 | 1312 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1313 | else |
adf653f9 | 1314 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1315 | |
adf653f9 | 1316 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1317 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1318 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1319 | |
6708bb27 | 1320 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1321 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1322 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1323 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1324 | ||
adf653f9 | 1325 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1326 | /* |
1327 | * Do the optional transition delay after we set the secondary | |
1328 | * ALUA access state. | |
1329 | */ | |
1330 | if (trans_delay_msecs != 0) | |
1331 | msleep_interruptible(trans_delay_msecs); | |
1332 | /* | |
1333 | * See if we need to update the ALUA fabric port metadata for | |
1334 | * secondary state and status | |
1335 | */ | |
adf653f9 CH |
1336 | if (lun->lun_tg_pt_secondary_write_md) |
1337 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1338 | |
1339 | return 0; | |
1340 | } | |
1341 | ||
229d4f11 HR |
1342 | struct t10_alua_lba_map * |
1343 | core_alua_allocate_lba_map(struct list_head *list, | |
1344 | u64 first_lba, u64 last_lba) | |
1345 | { | |
1346 | struct t10_alua_lba_map *lba_map; | |
1347 | ||
1348 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1349 | if (!lba_map) { | |
1350 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1351 | return ERR_PTR(-ENOMEM); | |
1352 | } | |
1353 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1354 | lba_map->lba_map_first_lba = first_lba; | |
1355 | lba_map->lba_map_last_lba = last_lba; | |
1356 | ||
1357 | list_add_tail(&lba_map->lba_map_list, list); | |
1358 | return lba_map; | |
1359 | } | |
1360 | ||
1361 | int | |
1362 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1363 | int pg_id, int state) | |
1364 | { | |
1365 | struct t10_alua_lba_map_member *lba_map_mem; | |
1366 | ||
1367 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1368 | lba_map_mem_list) { | |
1369 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1370 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1371 | return -EINVAL; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1376 | if (!lba_map_mem) { | |
1377 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1378 | return -ENOMEM; | |
1379 | } | |
1380 | lba_map_mem->lba_map_mem_alua_state = state; | |
1381 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1382 | ||
1383 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1384 | &lba_map->lba_map_mem_list); | |
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | void | |
1389 | core_alua_free_lba_map(struct list_head *lba_list) | |
1390 | { | |
1391 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1392 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1393 | ||
1394 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1395 | lba_map_list) { | |
1396 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1397 | &lba_map->lba_map_mem_list, | |
1398 | lba_map_mem_list) { | |
1399 | list_del(&lba_map_mem->lba_map_mem_list); | |
1400 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1401 | lba_map_mem); | |
1402 | } | |
1403 | list_del(&lba_map->lba_map_list); | |
1404 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | void | |
1409 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1410 | int segment_size, int segment_mult) | |
1411 | { | |
1412 | struct list_head old_lba_map_list; | |
1413 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1414 | int activate = 0, supported; | |
1415 | ||
1416 | INIT_LIST_HEAD(&old_lba_map_list); | |
1417 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1418 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1419 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1420 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1421 | if (lba_map_list) { | |
1422 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1423 | activate = 1; | |
1424 | } | |
1425 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1426 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1427 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1428 | tg_pt_gp_list) { | |
1429 | ||
1430 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1431 | continue; | |
1432 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1433 | if (activate) | |
1434 | supported |= ALUA_LBD_SUP; | |
1435 | else | |
1436 | supported &= ~ALUA_LBD_SUP; | |
1437 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1438 | } | |
1439 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1440 | core_alua_free_lba_map(&old_lba_map_list); | |
1441 | } | |
1442 | ||
c66ac9db NB |
1443 | struct t10_alua_lu_gp * |
1444 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1445 | { | |
1446 | struct t10_alua_lu_gp *lu_gp; | |
1447 | ||
1448 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1449 | if (!lu_gp) { |
1450 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1451 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1452 | } |
e3d6f909 | 1453 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1454 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1455 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1456 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1457 | ||
1458 | if (def_group) { | |
e3d6f909 | 1459 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1460 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1461 | alua_lu_gps_count++; |
c66ac9db NB |
1462 | } |
1463 | ||
1464 | return lu_gp; | |
1465 | } | |
1466 | ||
1467 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1468 | { | |
1469 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1470 | u16 lu_gp_id_tmp; | |
1471 | /* | |
1472 | * The lu_gp->lu_gp_id may only be set once.. | |
1473 | */ | |
1474 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1475 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1476 | " ignoring request\n"); |
e3d6f909 | 1477 | return -EINVAL; |
c66ac9db NB |
1478 | } |
1479 | ||
e3d6f909 AG |
1480 | spin_lock(&lu_gps_lock); |
1481 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1482 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1483 | " 0x0000ffff reached\n"); |
e3d6f909 | 1484 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1485 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1486 | return -ENOSPC; |
c66ac9db NB |
1487 | } |
1488 | again: | |
1489 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1490 | alua_lu_gps_counter++; |
c66ac9db | 1491 | |
e3d6f909 | 1492 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1493 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1494 | if (!lu_gp_id) |
c66ac9db NB |
1495 | goto again; |
1496 | ||
6708bb27 | 1497 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1498 | " already exists, ignoring request\n", |
1499 | lu_gp_id); | |
e3d6f909 AG |
1500 | spin_unlock(&lu_gps_lock); |
1501 | return -EINVAL; | |
c66ac9db NB |
1502 | } |
1503 | } | |
1504 | ||
1505 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1506 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1507 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1508 | alua_lu_gps_count++; | |
1509 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1510 | |
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | static struct t10_alua_lu_gp_member * | |
1515 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1516 | { | |
1517 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1518 | ||
1519 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1520 | if (!lu_gp_mem) { |
1521 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1522 | return ERR_PTR(-ENOMEM); |
1523 | } | |
1524 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1525 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1526 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1527 | ||
1528 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1529 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1530 | ||
1531 | return lu_gp_mem; | |
1532 | } | |
1533 | ||
1534 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1535 | { | |
1536 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1537 | /* | |
1538 | * Once we have reached this point, config_item_put() has | |
1539 | * already been called from target_core_alua_drop_lu_gp(). | |
1540 | * | |
1541 | * Here, we remove the *lu_gp from the global list so that | |
1542 | * no associations can be made while we are releasing | |
1543 | * struct t10_alua_lu_gp. | |
1544 | */ | |
e3d6f909 | 1545 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1546 | list_del(&lu_gp->lu_gp_node); |
1547 | alua_lu_gps_count--; | |
1548 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1549 | /* |
1550 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1551 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1552 | * released with core_alua_put_lu_gp_from_name() | |
1553 | */ | |
1554 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1555 | cpu_relax(); | |
1556 | /* | |
1557 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1558 | * struct se_device. | |
1559 | */ | |
1560 | spin_lock(&lu_gp->lu_gp_lock); | |
1561 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1562 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1563 | if (lu_gp_mem->lu_gp_assoc) { | |
1564 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1565 | lu_gp->lu_gp_members--; | |
1566 | lu_gp_mem->lu_gp_assoc = 0; | |
1567 | } | |
1568 | spin_unlock(&lu_gp->lu_gp_lock); | |
1569 | /* | |
1570 | * | |
25985edc | 1571 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1572 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1573 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1574 | * | |
1575 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1576 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1577 | */ |
1578 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1579 | if (lu_gp != default_lu_gp) |
c66ac9db | 1580 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1581 | default_lu_gp); |
c66ac9db NB |
1582 | else |
1583 | lu_gp_mem->lu_gp = NULL; | |
1584 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1585 | ||
1586 | spin_lock(&lu_gp->lu_gp_lock); | |
1587 | } | |
1588 | spin_unlock(&lu_gp->lu_gp_lock); | |
1589 | ||
1590 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1591 | } | |
1592 | ||
1593 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1594 | { | |
c66ac9db NB |
1595 | struct t10_alua_lu_gp *lu_gp; |
1596 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1597 | ||
c66ac9db | 1598 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1599 | if (!lu_gp_mem) |
c66ac9db NB |
1600 | return; |
1601 | ||
1602 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1603 | cpu_relax(); | |
1604 | ||
1605 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1606 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1607 | if (lu_gp) { |
c66ac9db NB |
1608 | spin_lock(&lu_gp->lu_gp_lock); |
1609 | if (lu_gp_mem->lu_gp_assoc) { | |
1610 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1611 | lu_gp->lu_gp_members--; | |
1612 | lu_gp_mem->lu_gp_assoc = 0; | |
1613 | } | |
1614 | spin_unlock(&lu_gp->lu_gp_lock); | |
1615 | lu_gp_mem->lu_gp = NULL; | |
1616 | } | |
1617 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1618 | ||
1619 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1620 | } | |
1621 | ||
1622 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1623 | { | |
1624 | struct t10_alua_lu_gp *lu_gp; | |
1625 | struct config_item *ci; | |
1626 | ||
e3d6f909 AG |
1627 | spin_lock(&lu_gps_lock); |
1628 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1629 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1630 | continue; |
1631 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1632 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1633 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1634 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1635 | return lu_gp; |
1636 | } | |
1637 | } | |
e3d6f909 | 1638 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1639 | |
1640 | return NULL; | |
1641 | } | |
1642 | ||
1643 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1644 | { | |
e3d6f909 | 1645 | spin_lock(&lu_gps_lock); |
c66ac9db | 1646 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1647 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1648 | } |
1649 | ||
1650 | /* | |
1651 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1652 | */ | |
1653 | void __core_alua_attach_lu_gp_mem( | |
1654 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1655 | struct t10_alua_lu_gp *lu_gp) | |
1656 | { | |
1657 | spin_lock(&lu_gp->lu_gp_lock); | |
1658 | lu_gp_mem->lu_gp = lu_gp; | |
1659 | lu_gp_mem->lu_gp_assoc = 1; | |
1660 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1661 | lu_gp->lu_gp_members++; | |
1662 | spin_unlock(&lu_gp->lu_gp_lock); | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1667 | */ | |
1668 | void __core_alua_drop_lu_gp_mem( | |
1669 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1670 | struct t10_alua_lu_gp *lu_gp) | |
1671 | { | |
1672 | spin_lock(&lu_gp->lu_gp_lock); | |
1673 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1674 | lu_gp_mem->lu_gp = NULL; | |
1675 | lu_gp_mem->lu_gp_assoc = 0; | |
1676 | lu_gp->lu_gp_members--; | |
1677 | spin_unlock(&lu_gp->lu_gp_lock); | |
1678 | } | |
1679 | ||
0fd97ccf CH |
1680 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1681 | const char *name, int def_group) | |
c66ac9db NB |
1682 | { |
1683 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1684 | ||
1685 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1686 | if (!tg_pt_gp) { |
1687 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1688 | return NULL; |
1689 | } | |
1690 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1691 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
c66ac9db NB |
1692 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); |
1693 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1694 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
9c6e164c HR |
1695 | INIT_DELAYED_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1696 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1697 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1698 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1699 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1700 | /* |
125d0119 | 1701 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1702 | */ |
1703 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1704 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1705 | /* |
1706 | * Set the default Active/NonOptimized Delay in milliseconds | |
1707 | */ | |
1708 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1709 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1710 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1711 | |
c0dc941e HR |
1712 | /* |
1713 | * Enable all supported states | |
1714 | */ | |
1715 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1716 | ALUA_T_SUP | ALUA_O_SUP | | |
1717 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1718 | ||
c66ac9db | 1719 | if (def_group) { |
0fd97ccf | 1720 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1721 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1722 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1723 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1724 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1725 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1726 | &dev->t10_alua.tg_pt_gps_list); |
1727 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1728 | } |
1729 | ||
1730 | return tg_pt_gp; | |
1731 | } | |
1732 | ||
1733 | int core_alua_set_tg_pt_gp_id( | |
1734 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1735 | u16 tg_pt_gp_id) | |
1736 | { | |
0fd97ccf | 1737 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1738 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1739 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1740 | |
c66ac9db NB |
1741 | /* |
1742 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1743 | */ | |
1744 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1745 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1746 | " ignoring request\n"); |
e3d6f909 | 1747 | return -EINVAL; |
c66ac9db NB |
1748 | } |
1749 | ||
0fd97ccf CH |
1750 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1751 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1752 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1753 | " 0x0000ffff reached\n"); |
0fd97ccf | 1754 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1755 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1756 | return -ENOSPC; |
c66ac9db NB |
1757 | } |
1758 | again: | |
1759 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1760 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1761 | |
0fd97ccf | 1762 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1763 | tg_pt_gp_list) { |
1764 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1765 | if (!tg_pt_gp_id) |
c66ac9db NB |
1766 | goto again; |
1767 | ||
6708bb27 | 1768 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1769 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1770 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1771 | return -EINVAL; |
c66ac9db NB |
1772 | } |
1773 | } | |
1774 | ||
1775 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1776 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1777 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1778 | &dev->t10_alua.tg_pt_gps_list); |
1779 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1780 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1781 | |
1782 | return 0; | |
1783 | } | |
1784 | ||
c66ac9db NB |
1785 | void core_alua_free_tg_pt_gp( |
1786 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1787 | { | |
0fd97ccf | 1788 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1789 | struct se_lun *lun, *next; |
0fd97ccf | 1790 | |
c66ac9db NB |
1791 | /* |
1792 | * Once we have reached this point, config_item_put() has already | |
1793 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1794 | * | |
1795 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1796 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1797 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1798 | */ | |
0fd97ccf | 1799 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1800 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1801 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1802 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1803 | ||
9c6e164c HR |
1804 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1805 | ||
c66ac9db NB |
1806 | /* |
1807 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1808 | * core_alua_get_tg_pt_gp_by_name() in | |
1809 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1810 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1811 | */ | |
1812 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1813 | cpu_relax(); | |
0fd97ccf | 1814 | |
c66ac9db NB |
1815 | /* |
1816 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1817 | * struct se_port. | |
1818 | */ | |
1819 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1820 | list_for_each_entry_safe(lun, next, |
1821 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1822 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1823 | tg_pt_gp->tg_pt_gp_members--; | |
1824 | ||
c66ac9db NB |
1825 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1826 | /* | |
c66ac9db | 1827 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1828 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1829 | * default_tg_pt_gp. |
1830 | */ | |
adf653f9 | 1831 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1832 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1833 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1834 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1835 | } else |
adf653f9 CH |
1836 | lun->lun_tg_pt_gp = NULL; |
1837 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1838 | |
1839 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1840 | } | |
1841 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1842 | ||
1843 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1844 | } | |
1845 | ||
c66ac9db | 1846 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1847 | struct se_device *dev, const char *name) |
c66ac9db NB |
1848 | { |
1849 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1850 | struct config_item *ci; | |
1851 | ||
0fd97ccf CH |
1852 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1853 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1854 | tg_pt_gp_list) { |
6708bb27 | 1855 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1856 | continue; |
1857 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1858 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1859 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1860 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1861 | return tg_pt_gp; |
1862 | } | |
1863 | } | |
0fd97ccf | 1864 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1865 | |
1866 | return NULL; | |
1867 | } | |
1868 | ||
1869 | static void core_alua_put_tg_pt_gp_from_name( | |
1870 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1871 | { | |
0fd97ccf | 1872 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1873 | |
0fd97ccf | 1874 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1875 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1876 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1877 | } |
1878 | ||
adf653f9 CH |
1879 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1880 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1881 | { |
3dd348fc HR |
1882 | struct se_dev_entry *se_deve; |
1883 | ||
adf653f9 CH |
1884 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1885 | ||
c66ac9db | 1886 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1887 | lun->lun_tg_pt_gp = tg_pt_gp; |
1888 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db | 1889 | tg_pt_gp->tg_pt_gp_members++; |
3dd348fc HR |
1890 | spin_lock(&lun->lun_deve_lock); |
1891 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) | |
1892 | core_scsi3_ua_allocate(se_deve, 0x3f, | |
1893 | ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); | |
1894 | spin_unlock(&lun->lun_deve_lock); | |
c66ac9db NB |
1895 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1896 | } | |
1897 | ||
adf653f9 CH |
1898 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1899 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1900 | { |
adf653f9 CH |
1901 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1902 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1903 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1904 | } | |
1905 | ||
1906 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1907 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1908 | { |
adf653f9 CH |
1909 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1910 | ||
c66ac9db | 1911 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1912 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1913 | tg_pt_gp->tg_pt_gp_members--; |
1914 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1915 | |
1916 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1917 | } |
1918 | ||
adf653f9 CH |
1919 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1920 | { | |
1921 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1922 | ||
1923 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1924 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1925 | if (tg_pt_gp) | |
1926 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1927 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1928 | } | |
1929 | ||
1930 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1931 | { |
c66ac9db | 1932 | struct config_item *tg_pt_ci; |
c66ac9db | 1933 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1934 | ssize_t len = 0; |
1935 | ||
adf653f9 CH |
1936 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1937 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1938 | if (tg_pt_gp) { |
c66ac9db NB |
1939 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1940 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1941 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1942 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1943 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1944 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
1945 | core_alua_dump_state(atomic_read( | |
1946 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
1947 | core_alua_dump_status( | |
1948 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1949 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1950 | "Offline" : "None", |
adf653f9 | 1951 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1952 | } |
adf653f9 | 1953 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1954 | |
1955 | return len; | |
1956 | } | |
1957 | ||
1958 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1959 | struct se_lun *lun, |
c66ac9db NB |
1960 | const char *page, |
1961 | size_t count) | |
1962 | { | |
adf653f9 | 1963 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1964 | /* |
1965 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1966 | * reference to se_device->dev_group. | |
1967 | */ | |
1968 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1969 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1970 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1971 | int move = 0; | |
1972 | ||
adf653f9 CH |
1973 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
1974 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
1975 | return -ENODEV; | |
c66ac9db NB |
1976 | |
1977 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1978 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1979 | return -EINVAL; |
1980 | } | |
1981 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1982 | memcpy(buf, page, count); | |
1983 | /* | |
1984 | * Any ALUA target port group alias besides "NULL" means we will be | |
1985 | * making a new group association. | |
1986 | */ | |
1987 | if (strcmp(strstrip(buf), "NULL")) { | |
1988 | /* | |
1989 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1990 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1991 | * core_alua_put_tg_pt_gp_from_name() below. | |
1992 | */ | |
0fd97ccf | 1993 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1994 | strstrip(buf)); |
6708bb27 | 1995 | if (!tg_pt_gp_new) |
c66ac9db NB |
1996 | return -ENODEV; |
1997 | } | |
c66ac9db | 1998 | |
adf653f9 CH |
1999 | spin_lock(&lun->lun_tg_pt_gp_lock); |
2000 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 2001 | if (tg_pt_gp) { |
c66ac9db NB |
2002 | /* |
2003 | * Clearing an existing tg_pt_gp association, and replacing | |
2004 | * with the default_tg_pt_gp. | |
2005 | */ | |
6708bb27 AG |
2006 | if (!tg_pt_gp_new) { |
2007 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
2008 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
2009 | " alua/%s, ID: %hu back to" | |
2010 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
2011 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2012 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2013 | config_item_name(&lun->lun_group.cg_item), |
2014 | config_item_name( | |
2015 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
2016 | tg_pt_gp->tg_pt_gp_id); | |
2017 | ||
adf653f9 CH |
2018 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
2019 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 2020 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 2021 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
2022 | |
2023 | return count; | |
2024 | } | |
adf653f9 | 2025 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
2026 | move = 1; |
2027 | } | |
adf653f9 CH |
2028 | |
2029 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
2030 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 2031 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2032 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2033 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2034 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2035 | config_item_name(&lun->lun_group.cg_item), |
2036 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2037 | tg_pt_gp_new->tg_pt_gp_id); | |
2038 | ||
2039 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2040 | return count; | |
2041 | } | |
2042 | ||
2043 | ssize_t core_alua_show_access_type( | |
2044 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2045 | char *page) | |
2046 | { | |
125d0119 HR |
2047 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2048 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2049 | return sprintf(page, "Implicit and Explicit\n"); | |
2050 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2051 | return sprintf(page, "Implicit\n"); | |
2052 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2053 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2054 | else |
2055 | return sprintf(page, "None\n"); | |
2056 | } | |
2057 | ||
2058 | ssize_t core_alua_store_access_type( | |
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 alua_access_type\n"); |
57103d7f | 2069 | return ret; |
c66ac9db NB |
2070 | } |
2071 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2072 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2073 | " %lu\n", tmp); |
2074 | return -EINVAL; | |
2075 | } | |
2076 | if (tmp == 3) | |
2077 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2078 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2079 | else if (tmp == 2) |
125d0119 | 2080 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2081 | else if (tmp == 1) |
125d0119 | 2082 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2083 | else |
2084 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2085 | ||
2086 | return count; | |
2087 | } | |
2088 | ||
2089 | ssize_t core_alua_show_nonop_delay_msecs( | |
2090 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2091 | char *page) | |
2092 | { | |
2093 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2094 | } | |
2095 | ||
2096 | ssize_t core_alua_store_nonop_delay_msecs( | |
2097 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2098 | const char *page, | |
2099 | size_t count) | |
2100 | { | |
2101 | unsigned long tmp; | |
2102 | int ret; | |
2103 | ||
57103d7f | 2104 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2105 | if (ret < 0) { |
6708bb27 | 2106 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2107 | return ret; |
c66ac9db NB |
2108 | } |
2109 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2110 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2111 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2112 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2113 | return -EINVAL; | |
2114 | } | |
2115 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2116 | ||
2117 | return count; | |
2118 | } | |
2119 | ||
2120 | ssize_t core_alua_show_trans_delay_msecs( | |
2121 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2122 | char *page) | |
2123 | { | |
2124 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2125 | } | |
2126 | ||
2127 | ssize_t core_alua_store_trans_delay_msecs( | |
2128 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2129 | const char *page, | |
2130 | size_t count) | |
2131 | { | |
2132 | unsigned long tmp; | |
2133 | int ret; | |
2134 | ||
57103d7f | 2135 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2136 | if (ret < 0) { |
6708bb27 | 2137 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2138 | return ret; |
c66ac9db NB |
2139 | } |
2140 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2141 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2142 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2143 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2144 | return -EINVAL; | |
2145 | } | |
2146 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2147 | ||
2148 | return count; | |
2149 | } | |
2150 | ||
125d0119 | 2151 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2152 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2153 | char *page) | |
2154 | { | |
125d0119 | 2155 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2156 | } |
2157 | ||
125d0119 | 2158 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2159 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2160 | const char *page, | |
2161 | size_t count) | |
2162 | { | |
2163 | unsigned long tmp; | |
2164 | int ret; | |
2165 | ||
57103d7f | 2166 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2167 | if (ret < 0) { |
125d0119 | 2168 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2169 | return ret; |
5b9a4d72 | 2170 | } |
125d0119 HR |
2171 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2172 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2173 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2174 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2175 | return -EINVAL; |
2176 | } | |
125d0119 | 2177 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2178 | |
2179 | return count; | |
2180 | } | |
2181 | ||
c66ac9db NB |
2182 | ssize_t core_alua_show_preferred_bit( |
2183 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2184 | char *page) | |
2185 | { | |
2186 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2187 | } | |
2188 | ||
2189 | ssize_t core_alua_store_preferred_bit( | |
2190 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2191 | const char *page, | |
2192 | size_t count) | |
2193 | { | |
2194 | unsigned long tmp; | |
2195 | int ret; | |
2196 | ||
57103d7f | 2197 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2198 | if (ret < 0) { |
6708bb27 | 2199 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2200 | return ret; |
c66ac9db NB |
2201 | } |
2202 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2203 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2204 | return -EINVAL; |
2205 | } | |
2206 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2207 | ||
2208 | return count; | |
2209 | } | |
2210 | ||
2211 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2212 | { | |
c66ac9db | 2213 | return sprintf(page, "%d\n", |
adf653f9 | 2214 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2215 | } |
2216 | ||
2217 | ssize_t core_alua_store_offline_bit( | |
2218 | struct se_lun *lun, | |
2219 | const char *page, | |
2220 | size_t count) | |
2221 | { | |
4cc987ea NB |
2222 | /* |
2223 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2224 | * reference to se_device->dev_group. | |
2225 | */ | |
2226 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2227 | unsigned long tmp; |
2228 | int ret; | |
2229 | ||
adf653f9 CH |
2230 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
2231 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
c66ac9db NB |
2232 | return -ENODEV; |
2233 | ||
57103d7f | 2234 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2235 | if (ret < 0) { |
6708bb27 | 2236 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2237 | return ret; |
c66ac9db NB |
2238 | } |
2239 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2240 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2241 | tmp); |
2242 | return -EINVAL; | |
2243 | } | |
c66ac9db | 2244 | |
adf653f9 | 2245 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2246 | if (ret < 0) |
2247 | return -EINVAL; | |
2248 | ||
2249 | return count; | |
2250 | } | |
2251 | ||
2252 | ssize_t core_alua_show_secondary_status( | |
2253 | struct se_lun *lun, | |
2254 | char *page) | |
2255 | { | |
adf653f9 | 2256 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2257 | } |
2258 | ||
2259 | ssize_t core_alua_store_secondary_status( | |
2260 | struct se_lun *lun, | |
2261 | const char *page, | |
2262 | size_t count) | |
2263 | { | |
2264 | unsigned long tmp; | |
2265 | int ret; | |
2266 | ||
57103d7f | 2267 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2268 | if (ret < 0) { |
6708bb27 | 2269 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2270 | return ret; |
c66ac9db NB |
2271 | } |
2272 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2273 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2274 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2275 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2276 | tmp); |
2277 | return -EINVAL; | |
2278 | } | |
adf653f9 | 2279 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2280 | |
2281 | return count; | |
2282 | } | |
2283 | ||
2284 | ssize_t core_alua_show_secondary_write_metadata( | |
2285 | struct se_lun *lun, | |
2286 | char *page) | |
2287 | { | |
adf653f9 | 2288 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2289 | } |
2290 | ||
2291 | ssize_t core_alua_store_secondary_write_metadata( | |
2292 | struct se_lun *lun, | |
2293 | const char *page, | |
2294 | size_t count) | |
2295 | { | |
2296 | unsigned long tmp; | |
2297 | int ret; | |
2298 | ||
57103d7f | 2299 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2300 | if (ret < 0) { |
6708bb27 | 2301 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2302 | return ret; |
c66ac9db NB |
2303 | } |
2304 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2305 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2306 | " %lu\n", tmp); |
2307 | return -EINVAL; | |
2308 | } | |
adf653f9 | 2309 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2310 | |
2311 | return count; | |
2312 | } | |
2313 | ||
0fd97ccf | 2314 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2315 | { |
a3541703 | 2316 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && |
c87fbd56 CH |
2317 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2318 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2319 | |
c66ac9db | 2320 | /* |
25985edc | 2321 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2322 | * LUN Group. |
2323 | */ | |
2324 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2325 | if (IS_ERR(lu_gp_mem)) |
2326 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2327 | |
c66ac9db NB |
2328 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2329 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2330 | default_lu_gp); |
c66ac9db NB |
2331 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2332 | ||
6708bb27 | 2333 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2334 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2335 | dev->transport->name); |
c66ac9db NB |
2336 | } |
2337 | ||
2338 | return 0; | |
2339 | } |