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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_alua.c | |
3 | * | |
4 | * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA) | |
5 | * | |
4c76251e | 6 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/slab.h> |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/configfs.h> | |
8dcf07be | 29 | #include <linux/delay.h> |
c53181af | 30 | #include <linux/export.h> |
8dcf07be | 31 | #include <linux/fcntl.h> |
0e9b10a9 | 32 | #include <linux/file.h> |
8dcf07be | 33 | #include <linux/fs.h> |
ba929992 | 34 | #include <scsi/scsi_proto.h> |
33395fb8 | 35 | #include <asm/unaligned.h> |
c66ac9db NB |
36 | |
37 | #include <target/target_core_base.h> | |
c4795fb2 CH |
38 | #include <target/target_core_backend.h> |
39 | #include <target/target_core_fabric.h> | |
c66ac9db | 40 | |
e26d99ae | 41 | #include "target_core_internal.h" |
c66ac9db | 42 | #include "target_core_alua.h" |
c66ac9db NB |
43 | #include "target_core_ua.h" |
44 | ||
bb91c1a0 HR |
45 | static sense_reason_t core_alua_check_transition(int state, int valid, |
46 | int *primary); | |
c66ac9db | 47 | static int core_alua_set_tg_pt_secondary_state( |
adf653f9 | 48 | struct se_lun *lun, int explicit, int offline); |
c66ac9db | 49 | |
bb91c1a0 HR |
50 | static char *core_alua_dump_state(int state); |
51 | ||
adf653f9 CH |
52 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
53 | struct t10_alua_tg_pt_gp *tg_pt_gp); | |
54 | ||
e3d6f909 AG |
55 | static u16 alua_lu_gps_counter; |
56 | static u32 alua_lu_gps_count; | |
57 | ||
58 | static DEFINE_SPINLOCK(lu_gps_lock); | |
59 | static LIST_HEAD(lu_gps_list); | |
60 | ||
61 | struct t10_alua_lu_gp *default_lu_gp; | |
62 | ||
c66094bf HR |
63 | /* |
64 | * REPORT REFERRALS | |
65 | * | |
66 | * See sbc3r35 section 5.23 | |
67 | */ | |
68 | sense_reason_t | |
69 | target_emulate_report_referrals(struct se_cmd *cmd) | |
70 | { | |
71 | struct se_device *dev = cmd->se_dev; | |
72 | struct t10_alua_lba_map *map; | |
73 | struct t10_alua_lba_map_member *map_mem; | |
74 | unsigned char *buf; | |
75 | u32 rd_len = 0, off; | |
76 | ||
77 | if (cmd->data_length < 4) { | |
78 | pr_warn("REPORT REFERRALS allocation length %u too" | |
79 | " small\n", cmd->data_length); | |
80 | return TCM_INVALID_CDB_FIELD; | |
81 | } | |
82 | ||
83 | buf = transport_kmap_data_sg(cmd); | |
84 | if (!buf) | |
85 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
86 | ||
87 | off = 4; | |
88 | spin_lock(&dev->t10_alua.lba_map_lock); | |
89 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
90 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
91 | transport_kunmap_data_sg(cmd); | |
92 | ||
93 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
94 | } | |
95 | ||
96 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
97 | lba_map_list) { | |
98 | int desc_num = off + 3; | |
99 | int pg_num; | |
100 | ||
101 | off += 4; | |
38edd724 HR |
102 | if (cmd->data_length > off) |
103 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 104 | off += 8; |
38edd724 HR |
105 | if (cmd->data_length > off) |
106 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
107 | off += 8; |
108 | rd_len += 20; | |
109 | pg_num = 0; | |
110 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
111 | lba_map_mem_list) { | |
38edd724 HR |
112 | int alua_state = map_mem->lba_map_mem_alua_state; |
113 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
114 | ||
115 | if (cmd->data_length > off) | |
116 | buf[off] = alua_state & 0x0f; | |
117 | off += 2; | |
118 | if (cmd->data_length > off) | |
119 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
120 | off++; | |
121 | if (cmd->data_length > off) | |
122 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 123 | off++; |
c66094bf HR |
124 | rd_len += 4; |
125 | pg_num++; | |
126 | } | |
38edd724 HR |
127 | if (cmd->data_length > desc_num) |
128 | buf[desc_num] = pg_num; | |
c66094bf HR |
129 | } |
130 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
131 | ||
132 | /* | |
133 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
134 | */ | |
135 | put_unaligned_be16(rd_len, &buf[2]); | |
136 | ||
137 | transport_kunmap_data_sg(cmd); | |
138 | ||
139 | target_complete_cmd(cmd, GOOD); | |
140 | return 0; | |
141 | } | |
142 | ||
c66ac9db NB |
143 | /* |
144 | * REPORT_TARGET_PORT_GROUPS | |
145 | * | |
146 | * See spc4r17 section 6.27 | |
147 | */ | |
de103c93 CH |
148 | sense_reason_t |
149 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 150 | { |
0fd97ccf | 151 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 152 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
adf653f9 | 153 | struct se_lun *lun; |
05d1c7c0 | 154 | unsigned char *buf; |
5b9a4d72 NB |
155 | u32 rd_len = 0, off; |
156 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 157 | |
6b20fa9a | 158 | /* |
5b9a4d72 NB |
159 | * Skip over RESERVED area to first Target port group descriptor |
160 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 161 | */ |
5b9a4d72 NB |
162 | if (ext_hdr != 0) |
163 | off = 8; | |
164 | else | |
165 | off = 4; | |
166 | ||
167 | if (cmd->data_length < off) { | |
168 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
169 | " small for %s header\n", cmd->data_length, | |
170 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 171 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 172 | } |
4949314c | 173 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
174 | if (!buf) |
175 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 176 | |
0fd97ccf CH |
177 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
178 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 179 | tg_pt_gp_list) { |
6b20fa9a NB |
180 | /* |
181 | * Check if the Target port group and Target port descriptor list | |
182 | * based on tg_pt_gp_members count will fit into the response payload. | |
183 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
184 | * the allocation length and the response is truncated. | |
185 | */ | |
186 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
187 | cmd->data_length) { | |
188 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
189 | continue; | |
190 | } | |
c66ac9db NB |
191 | /* |
192 | * PREF: Preferred target port bit, determine if this | |
193 | * bit should be set for port group. | |
194 | */ | |
195 | if (tg_pt_gp->tg_pt_gp_pref) | |
196 | buf[off] = 0x80; | |
197 | /* | |
198 | * Set the ASYMMETRIC ACCESS State | |
199 | */ | |
200 | buf[off++] |= (atomic_read( | |
201 | &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff); | |
202 | /* | |
203 | * Set supported ASYMMETRIC ACCESS State bits | |
204 | */ | |
c0dc941e | 205 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
206 | /* |
207 | * TARGET PORT GROUP | |
208 | */ | |
209 | buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff); | |
210 | buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff); | |
211 | ||
212 | off++; /* Skip over Reserved */ | |
213 | /* | |
214 | * STATUS CODE | |
215 | */ | |
216 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
217 | /* | |
218 | * Vendor Specific field | |
219 | */ | |
220 | buf[off++] = 0x00; | |
221 | /* | |
222 | * TARGET PORT COUNT | |
223 | */ | |
224 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
225 | rd_len += 8; | |
226 | ||
227 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
228 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
229 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
230 | /* |
231 | * Start Target Port descriptor format | |
232 | * | |
233 | * See spc4r17 section 6.2.7 Table 247 | |
234 | */ | |
235 | off += 2; /* Skip over Obsolete */ | |
236 | /* | |
237 | * Set RELATIVE TARGET PORT IDENTIFIER | |
238 | */ | |
adf653f9 CH |
239 | buf[off++] = ((lun->lun_rtpi >> 8) & 0xff); |
240 | buf[off++] = (lun->lun_rtpi & 0xff); | |
c66ac9db NB |
241 | rd_len += 4; |
242 | } | |
243 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
244 | } | |
0fd97ccf | 245 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
246 | /* |
247 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
248 | */ | |
5b9a4d72 | 249 | put_unaligned_be32(rd_len, &buf[0]); |
c66ac9db | 250 | |
5b9a4d72 NB |
251 | /* |
252 | * Fill in the Extended header parameter data format if requested | |
253 | */ | |
254 | if (ext_hdr != 0) { | |
255 | buf[4] = 0x10; | |
256 | /* | |
125d0119 | 257 | * Set the implicit transition time (in seconds) for the application |
5b9a4d72 NB |
258 | * client to use as a base for it's transition timeout value. |
259 | * | |
260 | * Use the current tg_pt_gp_mem -> tg_pt_gp membership from the LUN | |
261 | * this CDB was received upon to determine this value individually | |
262 | * for ALUA target port group. | |
263 | */ | |
adf653f9 CH |
264 | spin_lock(&cmd->se_lun->lun_tg_pt_gp_lock); |
265 | tg_pt_gp = cmd->se_lun->lun_tg_pt_gp; | |
266 | if (tg_pt_gp) | |
267 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; | |
268 | spin_unlock(&cmd->se_lun->lun_tg_pt_gp_lock); | |
5b9a4d72 | 269 | } |
4949314c | 270 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 271 | |
6bb35e00 | 272 | target_complete_cmd(cmd, GOOD); |
c66ac9db NB |
273 | return 0; |
274 | } | |
275 | ||
276 | /* | |
125d0119 | 277 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
278 | * |
279 | * See spc4r17 section 6.35 | |
280 | */ | |
de103c93 CH |
281 | sense_reason_t |
282 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 283 | { |
5951146d | 284 | struct se_device *dev = cmd->se_dev; |
adf653f9 | 285 | struct se_lun *l_lun = cmd->se_lun; |
e3d6f909 | 286 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; |
c66ac9db | 287 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
05d1c7c0 AG |
288 | unsigned char *buf; |
289 | unsigned char *ptr; | |
a0d50f62 | 290 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 291 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 292 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
293 | u16 tg_pt_id, rtpi; |
294 | ||
0d7f1299 PB |
295 | if (cmd->data_length < 4) { |
296 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
297 | " small\n", cmd->data_length); | |
de103c93 | 298 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
299 | } |
300 | ||
4949314c | 301 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
302 | if (!buf) |
303 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 304 | |
c66ac9db | 305 | /* |
125d0119 | 306 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
307 | * for the local tg_pt_gp. |
308 | */ | |
adf653f9 CH |
309 | spin_lock(&l_lun->lun_tg_pt_gp_lock); |
310 | l_tg_pt_gp = l_lun->lun_tg_pt_gp; | |
6708bb27 | 311 | if (!l_tg_pt_gp) { |
adf653f9 CH |
312 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
313 | pr_err("Unable to access l_lun->tg_pt_gp\n"); | |
de103c93 | 314 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 315 | goto out; |
c66ac9db | 316 | } |
c66ac9db | 317 | |
125d0119 | 318 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
adf653f9 | 319 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
6708bb27 | 320 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 321 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 322 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 323 | goto out; |
c66ac9db | 324 | } |
bb91c1a0 | 325 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
adf653f9 | 326 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
c66ac9db | 327 | |
05d1c7c0 AG |
328 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
329 | ||
c66ac9db | 330 | while (len < cmd->data_length) { |
de103c93 | 331 | bool found = false; |
c66ac9db NB |
332 | alua_access_state = (ptr[0] & 0x0f); |
333 | /* | |
334 | * Check the received ALUA access state, and determine if | |
335 | * the state is a primary or secondary target port asymmetric | |
336 | * access state. | |
337 | */ | |
bb91c1a0 HR |
338 | rc = core_alua_check_transition(alua_access_state, |
339 | valid_states, &primary); | |
de103c93 | 340 | if (rc) { |
c66ac9db NB |
341 | /* |
342 | * If the SET TARGET PORT GROUPS attempts to establish | |
343 | * an invalid combination of target port asymmetric | |
344 | * access states or attempts to establish an | |
345 | * unsupported target port asymmetric access state, | |
346 | * then the command shall be terminated with CHECK | |
347 | * CONDITION status, with the sense key set to ILLEGAL | |
348 | * REQUEST, and the additional sense code set to INVALID | |
349 | * FIELD IN PARAMETER LIST. | |
350 | */ | |
05d1c7c0 | 351 | goto out; |
c66ac9db | 352 | } |
de103c93 | 353 | |
c66ac9db NB |
354 | /* |
355 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
356 | * specifies a primary target port asymmetric access state, | |
357 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
358 | * a primary target port group for which the primary target | |
359 | * port asymmetric access state shall be changed. If the | |
360 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
361 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
362 | * TARGET PORT field specifies the relative target port | |
363 | * identifier (see 3.1.120) of the target port for which the | |
364 | * secondary target port asymmetric access state shall be | |
365 | * changed. | |
366 | */ | |
367 | if (primary) { | |
33395fb8 | 368 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
369 | /* |
370 | * Locate the matching target port group ID from | |
371 | * the global tg_pt_gp list | |
372 | */ | |
0fd97ccf | 373 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 374 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 375 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 376 | tg_pt_gp_list) { |
6708bb27 | 377 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
378 | continue; |
379 | ||
380 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
381 | continue; | |
382 | ||
33940d09 | 383 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
de103c93 | 384 | |
0fd97ccf | 385 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 386 | |
de103c93 | 387 | if (!core_alua_do_port_transition(tg_pt_gp, |
adf653f9 | 388 | dev, l_lun, nacl, |
de103c93 CH |
389 | alua_access_state, 1)) |
390 | found = true; | |
c66ac9db | 391 | |
0fd97ccf | 392 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 393 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
c66ac9db NB |
394 | break; |
395 | } | |
0fd97ccf | 396 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 397 | } else { |
adf653f9 CH |
398 | struct se_lun *lun; |
399 | ||
c66ac9db | 400 | /* |
f1ae05d5 | 401 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
402 | * the Target Port in question for the the incoming |
403 | * SET_TARGET_PORT_GROUPS op. | |
404 | */ | |
33395fb8 | 405 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 406 | /* |
35d1efe8 | 407 | * Locate the matching relative target port identifier |
c66ac9db NB |
408 | * for the struct se_device storage object. |
409 | */ | |
410 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
411 | list_for_each_entry(lun, &dev->dev_sep_list, |
412 | lun_dev_link) { | |
413 | if (lun->lun_rtpi != rtpi) | |
c66ac9db NB |
414 | continue; |
415 | ||
adf653f9 | 416 | // XXX: racy unlock |
c66ac9db NB |
417 | spin_unlock(&dev->se_port_lock); |
418 | ||
de103c93 | 419 | if (!core_alua_set_tg_pt_secondary_state( |
adf653f9 | 420 | lun, 1, 1)) |
de103c93 | 421 | found = true; |
c66ac9db NB |
422 | |
423 | spin_lock(&dev->se_port_lock); | |
424 | break; | |
425 | } | |
426 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
427 | } |
428 | ||
429 | if (!found) { | |
430 | rc = TCM_INVALID_PARAMETER_LIST; | |
431 | goto out; | |
c66ac9db NB |
432 | } |
433 | ||
434 | ptr += 4; | |
435 | len += 4; | |
436 | } | |
437 | ||
05d1c7c0 | 438 | out: |
4949314c | 439 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
440 | if (!rc) |
441 | target_complete_cmd(cmd, GOOD); | |
442 | return rc; | |
c66ac9db NB |
443 | } |
444 | ||
1e3ab99d PB |
445 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
446 | { | |
447 | /* | |
448 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
449 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
450 | * by the ALUA primary or secondary access state.. | |
451 | */ | |
452 | pr_debug("[%s]: ALUA TG Port not available, " | |
453 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
454 | "0x04/0x%02x\n", | |
455 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
456 | ||
457 | cmd->scsi_asc = 0x04; | |
458 | cmd->scsi_ascq = alua_ascq; | |
459 | } | |
460 | ||
461 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
462 | struct se_cmd *cmd, |
463 | unsigned char *cdb, | |
1e3ab99d | 464 | int nonop_delay_msecs) |
c66ac9db NB |
465 | { |
466 | /* | |
467 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
468 | * later to determine if processing of this cmd needs to be | |
469 | * temporarily delayed for the Active/NonOptimized primary access state. | |
470 | */ | |
471 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
472 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
473 | } |
474 | ||
c66094bf HR |
475 | static inline int core_alua_state_lba_dependent( |
476 | struct se_cmd *cmd, | |
1e3ab99d | 477 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
478 | { |
479 | struct se_device *dev = cmd->se_dev; | |
480 | u64 segment_size, segment_mult, sectors, lba; | |
481 | ||
482 | /* Only need to check for cdb actually containing LBAs */ | |
483 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
484 | return 0; | |
485 | ||
486 | spin_lock(&dev->t10_alua.lba_map_lock); | |
487 | segment_size = dev->t10_alua.lba_map_segment_size; | |
488 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
489 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
490 | ||
491 | lba = cmd->t_task_lba; | |
492 | while (lba < cmd->t_task_lba + sectors) { | |
493 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
494 | struct t10_alua_lba_map_member *map_mem; | |
495 | ||
496 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
497 | lba_map_list) { | |
498 | u64 start_lba, last_lba; | |
499 | u64 first_lba = map->lba_map_first_lba; | |
500 | ||
501 | if (segment_mult) { | |
502 | u64 tmp = lba; | |
cdf55949 | 503 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
504 | |
505 | last_lba = first_lba + segment_size - 1; | |
506 | if (start_lba >= first_lba && | |
507 | start_lba <= last_lba) { | |
508 | lba += segment_size; | |
509 | cur_map = map; | |
510 | break; | |
511 | } | |
512 | } else { | |
513 | last_lba = map->lba_map_last_lba; | |
514 | if (lba >= first_lba && lba <= last_lba) { | |
515 | lba = last_lba + 1; | |
516 | cur_map = map; | |
517 | break; | |
518 | } | |
519 | } | |
520 | } | |
521 | if (!cur_map) { | |
522 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 523 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
524 | return 1; |
525 | } | |
526 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
527 | lba_map_mem_list) { | |
528 | if (map_mem->lba_map_mem_alua_pg_id != | |
529 | tg_pt_gp->tg_pt_gp_id) | |
530 | continue; | |
531 | switch(map_mem->lba_map_mem_alua_state) { | |
532 | case ALUA_ACCESS_STATE_STANDBY: | |
533 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 534 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
535 | return 1; |
536 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
537 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 538 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
539 | return 1; |
540 | default: | |
541 | break; | |
542 | } | |
543 | } | |
544 | } | |
545 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
546 | return 0; | |
547 | } | |
548 | ||
c66ac9db NB |
549 | static inline int core_alua_state_standby( |
550 | struct se_cmd *cmd, | |
1e3ab99d | 551 | unsigned char *cdb) |
c66ac9db NB |
552 | { |
553 | /* | |
554 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
555 | * spc4r17 section 5.9.2.4.4 | |
556 | */ | |
557 | switch (cdb[0]) { | |
558 | case INQUIRY: | |
559 | case LOG_SELECT: | |
560 | case LOG_SENSE: | |
561 | case MODE_SELECT: | |
562 | case MODE_SENSE: | |
563 | case REPORT_LUNS: | |
564 | case RECEIVE_DIAGNOSTIC: | |
565 | case SEND_DIAGNOSTIC: | |
e7810c2d | 566 | case READ_CAPACITY: |
30f359a6 | 567 | return 0; |
eb846d9f | 568 | case SERVICE_ACTION_IN_16: |
e7810c2d NB |
569 | switch (cdb[1] & 0x1f) { |
570 | case SAI_READ_CAPACITY_16: | |
571 | return 0; | |
572 | default: | |
573 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); | |
574 | return 1; | |
575 | } | |
c66ac9db | 576 | case MAINTENANCE_IN: |
ba539743 | 577 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
578 | case MI_REPORT_TARGET_PGS: |
579 | return 0; | |
580 | default: | |
1e3ab99d | 581 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
582 | return 1; |
583 | } | |
584 | case MAINTENANCE_OUT: | |
585 | switch (cdb[1]) { | |
586 | case MO_SET_TARGET_PGS: | |
587 | return 0; | |
588 | default: | |
1e3ab99d | 589 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
590 | return 1; |
591 | } | |
592 | case REQUEST_SENSE: | |
593 | case PERSISTENT_RESERVE_IN: | |
594 | case PERSISTENT_RESERVE_OUT: | |
595 | case READ_BUFFER: | |
596 | case WRITE_BUFFER: | |
597 | return 0; | |
598 | default: | |
1e3ab99d | 599 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
600 | return 1; |
601 | } | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | static inline int core_alua_state_unavailable( | |
607 | struct se_cmd *cmd, | |
1e3ab99d | 608 | unsigned char *cdb) |
c66ac9db NB |
609 | { |
610 | /* | |
611 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
612 | * spc4r17 section 5.9.2.4.5 | |
613 | */ | |
614 | switch (cdb[0]) { | |
615 | case INQUIRY: | |
616 | case REPORT_LUNS: | |
30f359a6 | 617 | return 0; |
c66ac9db | 618 | case MAINTENANCE_IN: |
ba539743 | 619 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
620 | case MI_REPORT_TARGET_PGS: |
621 | return 0; | |
622 | default: | |
1e3ab99d | 623 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
624 | return 1; |
625 | } | |
626 | case MAINTENANCE_OUT: | |
627 | switch (cdb[1]) { | |
628 | case MO_SET_TARGET_PGS: | |
629 | return 0; | |
630 | default: | |
1e3ab99d | 631 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
632 | return 1; |
633 | } | |
634 | case REQUEST_SENSE: | |
635 | case READ_BUFFER: | |
636 | case WRITE_BUFFER: | |
637 | return 0; | |
638 | default: | |
1e3ab99d | 639 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
640 | return 1; |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | static inline int core_alua_state_transition( | |
647 | struct se_cmd *cmd, | |
1e3ab99d | 648 | unsigned char *cdb) |
c66ac9db NB |
649 | { |
650 | /* | |
f1ae05d5 | 651 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
652 | * spc4r17 section 5.9.2.5 |
653 | */ | |
654 | switch (cdb[0]) { | |
655 | case INQUIRY: | |
656 | case REPORT_LUNS: | |
30f359a6 | 657 | return 0; |
c66ac9db | 658 | case MAINTENANCE_IN: |
ba539743 | 659 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
660 | case MI_REPORT_TARGET_PGS: |
661 | return 0; | |
662 | default: | |
1e3ab99d | 663 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
664 | return 1; |
665 | } | |
666 | case REQUEST_SENSE: | |
667 | case READ_BUFFER: | |
668 | case WRITE_BUFFER: | |
669 | return 0; | |
670 | default: | |
1e3ab99d | 671 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
672 | return 1; |
673 | } | |
674 | ||
675 | return 0; | |
676 | } | |
677 | ||
678 | /* | |
f1ae05d5 | 679 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 680 | * return 0: Used to signal success |
f1ae05d5 | 681 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 682 | */ |
de103c93 CH |
683 | sense_reason_t |
684 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 685 | { |
c87fbd56 CH |
686 | struct se_device *dev = cmd->se_dev; |
687 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 688 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 689 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db | 690 | int out_alua_state, nonop_delay_msecs; |
c87fbd56 CH |
691 | |
692 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
693 | return 0; | |
a3541703 | 694 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
c87fbd56 | 695 | return 0; |
c66ac9db | 696 | |
c66ac9db NB |
697 | /* |
698 | * First, check for a struct se_port specific secondary ALUA target port | |
699 | * access state: OFFLINE | |
700 | */ | |
adf653f9 | 701 | if (atomic_read(&lun->lun_tg_pt_secondary_offline)) { |
6708bb27 | 702 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 703 | " target port\n"); |
1e3ab99d PB |
704 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
705 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db | 706 | } |
adf653f9 CH |
707 | |
708 | if (!lun->lun_tg_pt_gp) | |
89c12cc9 NB |
709 | return 0; |
710 | ||
adf653f9 CH |
711 | spin_lock(&lun->lun_tg_pt_gp_lock); |
712 | tg_pt_gp = lun->lun_tg_pt_gp; | |
c66ac9db NB |
713 | out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); |
714 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; | |
adf653f9 CH |
715 | |
716 | // XXX: keeps using tg_pt_gp witout reference after unlock | |
717 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db | 718 | /* |
73f3bf51 | 719 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 720 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
721 | * For the Optimized ALUA access state case, we want to process the |
722 | * incoming fabric cmd ASAP.. | |
723 | */ | |
73f3bf51 | 724 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
725 | return 0; |
726 | ||
727 | switch (out_alua_state) { | |
728 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 729 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 730 | break; |
c66ac9db | 731 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
732 | if (core_alua_state_standby(cmd, cdb)) |
733 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 734 | break; |
c66ac9db | 735 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
736 | if (core_alua_state_unavailable(cmd, cdb)) |
737 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 738 | break; |
c66ac9db | 739 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
740 | if (core_alua_state_transition(cmd, cdb)) |
741 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 742 | break; |
c66094bf | 743 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
744 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
745 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 746 | break; |
c66ac9db NB |
747 | /* |
748 | * OFFLINE is a secondary ALUA target port group access state, that is | |
adf653f9 | 749 | * handled above with struct se_lun->lun_tg_pt_secondary_offline=1 |
c66ac9db NB |
750 | */ |
751 | case ALUA_ACCESS_STATE_OFFLINE: | |
752 | default: | |
6708bb27 | 753 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 754 | out_alua_state); |
de103c93 | 755 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
756 | } |
757 | ||
de103c93 | 758 | return 0; |
c66ac9db NB |
759 | } |
760 | ||
761 | /* | |
125d0119 | 762 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 763 | */ |
de103c93 | 764 | static sense_reason_t |
bb91c1a0 | 765 | core_alua_check_transition(int state, int valid, int *primary) |
c66ac9db | 766 | { |
bb91c1a0 HR |
767 | /* |
768 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
769 | * defined as primary target port asymmetric access states. | |
770 | */ | |
c66ac9db | 771 | switch (state) { |
73f3bf51 | 772 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
773 | if (!(valid & ALUA_AO_SUP)) |
774 | goto not_supported; | |
775 | *primary = 1; | |
776 | break; | |
c66ac9db | 777 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
778 | if (!(valid & ALUA_AN_SUP)) |
779 | goto not_supported; | |
780 | *primary = 1; | |
781 | break; | |
c66ac9db | 782 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
783 | if (!(valid & ALUA_S_SUP)) |
784 | goto not_supported; | |
785 | *primary = 1; | |
786 | break; | |
c66ac9db | 787 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
788 | if (!(valid & ALUA_U_SUP)) |
789 | goto not_supported; | |
c66ac9db NB |
790 | *primary = 1; |
791 | break; | |
c66094bf HR |
792 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
793 | if (!(valid & ALUA_LBD_SUP)) | |
794 | goto not_supported; | |
795 | *primary = 1; | |
796 | break; | |
c66ac9db NB |
797 | case ALUA_ACCESS_STATE_OFFLINE: |
798 | /* | |
799 | * OFFLINE state is defined as a secondary target port | |
800 | * asymmetric access state. | |
801 | */ | |
bb91c1a0 HR |
802 | if (!(valid & ALUA_O_SUP)) |
803 | goto not_supported; | |
c66ac9db NB |
804 | *primary = 0; |
805 | break; | |
bb91c1a0 HR |
806 | case ALUA_ACCESS_STATE_TRANSITION: |
807 | /* | |
808 | * Transitioning is set internally, and | |
809 | * cannot be selected manually. | |
810 | */ | |
811 | goto not_supported; | |
c66ac9db | 812 | default: |
6708bb27 | 813 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 814 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
815 | } |
816 | ||
817 | return 0; | |
bb91c1a0 HR |
818 | |
819 | not_supported: | |
820 | pr_err("ALUA access state %s not supported", | |
821 | core_alua_dump_state(state)); | |
822 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
823 | } |
824 | ||
825 | static char *core_alua_dump_state(int state) | |
826 | { | |
827 | switch (state) { | |
73f3bf51 | 828 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
829 | return "Active/Optimized"; |
830 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
831 | return "Active/NonOptimized"; | |
c66094bf HR |
832 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
833 | return "LBA Dependent"; | |
c66ac9db NB |
834 | case ALUA_ACCESS_STATE_STANDBY: |
835 | return "Standby"; | |
836 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
837 | return "Unavailable"; | |
838 | case ALUA_ACCESS_STATE_OFFLINE: | |
839 | return "Offline"; | |
bb91c1a0 HR |
840 | case ALUA_ACCESS_STATE_TRANSITION: |
841 | return "Transitioning"; | |
c66ac9db NB |
842 | default: |
843 | return "Unknown"; | |
844 | } | |
845 | ||
846 | return NULL; | |
847 | } | |
848 | ||
849 | char *core_alua_dump_status(int status) | |
850 | { | |
851 | switch (status) { | |
852 | case ALUA_STATUS_NONE: | |
853 | return "None"; | |
125d0119 HR |
854 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
855 | return "Altered by Explicit STPG"; | |
856 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
857 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
858 | default: |
859 | return "Unknown"; | |
860 | } | |
861 | ||
862 | return NULL; | |
863 | } | |
864 | ||
865 | /* | |
866 | * Used by fabric modules to determine when we need to delay processing | |
867 | * for the Active/NonOptimized paths.. | |
868 | */ | |
869 | int core_alua_check_nonop_delay( | |
870 | struct se_cmd *cmd) | |
871 | { | |
872 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
873 | return 0; | |
874 | if (in_interrupt()) | |
875 | return 0; | |
876 | /* | |
877 | * The ALUA Active/NonOptimized access state delay can be disabled | |
878 | * in via configfs with a value of zero | |
879 | */ | |
6708bb27 | 880 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
881 | return 0; |
882 | /* | |
883 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
884 | * defined interval in core_alua_state_nonoptimized() | |
885 | */ | |
886 | msleep_interruptible(cmd->alua_nonop_delay); | |
887 | return 0; | |
888 | } | |
889 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
890 | ||
c66ac9db NB |
891 | static int core_alua_write_tpg_metadata( |
892 | const char *path, | |
893 | unsigned char *md_buf, | |
894 | u32 md_buf_len) | |
895 | { | |
0e9b10a9 AV |
896 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
897 | int ret; | |
c66ac9db | 898 | |
0e9b10a9 AV |
899 | if (IS_ERR(file)) { |
900 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
901 | return -ENODEV; |
902 | } | |
0e9b10a9 AV |
903 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
904 | if (ret < 0) | |
6708bb27 | 905 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 906 | fput(file); |
f730f915 | 907 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
908 | } |
909 | ||
910 | /* | |
911 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held | |
912 | */ | |
913 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 914 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 915 | { |
1e0b9403 | 916 | unsigned char *md_buf; |
0fd97ccf | 917 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
c66ac9db | 918 | char path[ALUA_METADATA_PATH_LEN]; |
1e0b9403 HR |
919 | int len, rc; |
920 | ||
921 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
922 | if (!md_buf) { | |
923 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
924 | return -ENOMEM; | |
925 | } | |
c66ac9db NB |
926 | |
927 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
928 | ||
1e0b9403 | 929 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
930 | "tg_pt_gp_id=%hu\n" |
931 | "alua_access_state=0x%02x\n" | |
932 | "alua_access_status=0x%02x\n", | |
9c6e164c HR |
933 | tg_pt_gp->tg_pt_gp_id, |
934 | tg_pt_gp->tg_pt_gp_alua_pending_state, | |
c66ac9db NB |
935 | tg_pt_gp->tg_pt_gp_alua_access_status); |
936 | ||
937 | snprintf(path, ALUA_METADATA_PATH_LEN, | |
fdddf932 | 938 | "%s/alua/tpgs_%s/%s", db_root, &wwn->unit_serial[0], |
c66ac9db NB |
939 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); |
940 | ||
1e0b9403 HR |
941 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
942 | kfree(md_buf); | |
943 | return rc; | |
c66ac9db NB |
944 | } |
945 | ||
ee8c07d0 | 946 | static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db NB |
947 | { |
948 | struct se_dev_entry *se_deve; | |
adf653f9 | 949 | struct se_lun *lun; |
c66ac9db | 950 | struct se_lun_acl *lacl; |
c66ac9db NB |
951 | |
952 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
953 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
954 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
955 | /* |
956 | * After an implicit target port asymmetric access state | |
957 | * change, a device server shall establish a unit attention | |
958 | * condition for the initiator port associated with every I_T | |
959 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 960 | * ACCESS STATE CHANGED. |
c66ac9db NB |
961 | * |
962 | * After an explicit target port asymmetric access state | |
963 | * change, a device server shall establish a unit attention | |
964 | * condition with the additional sense code set to ASYMMETRIC | |
965 | * ACCESS STATE CHANGED for the initiator port associated with | |
966 | * every I_T nexus other than the I_T nexus on which the SET | |
967 | * TARGET PORT GROUPS command | |
968 | */ | |
9e37d042 NB |
969 | if (!percpu_ref_tryget_live(&lun->lun_ref)) |
970 | continue; | |
c66ac9db NB |
971 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
972 | ||
1adff1b3 | 973 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 974 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) { |
29a05dee | 975 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
adf653f9 | 976 | lockdep_is_held(&lun->lun_deve_lock)); |
c51c8e7b | 977 | |
c66ac9db | 978 | /* |
c51c8e7b HR |
979 | * spc4r37 p.242: |
980 | * After an explicit target port asymmetric access | |
981 | * state change, a device server shall establish a | |
982 | * unit attention condition with the additional sense | |
983 | * code set to ASYMMETRIC ACCESS STATE CHANGED for | |
984 | * the initiator port associated with every I_T nexus | |
985 | * other than the I_T nexus on which the SET TARGET | |
986 | * PORT GROUPS command was received. | |
c66ac9db | 987 | */ |
9c6e164c HR |
988 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
989 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
adf653f9 CH |
990 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
991 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
992 | continue; |
993 | ||
c51c8e7b HR |
994 | /* |
995 | * se_deve->se_lun_acl pointer may be NULL for a | |
996 | * entry created without explicit Node+MappedLUN ACLs | |
997 | */ | |
998 | if (lacl && (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
999 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl)) | |
1000 | continue; | |
1001 | ||
1002 | core_scsi3_ua_allocate(se_deve, 0x2A, | |
c66ac9db NB |
1003 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); |
1004 | } | |
1adff1b3 | 1005 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db NB |
1006 | |
1007 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 1008 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
1009 | } |
1010 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
ee8c07d0 HR |
1011 | } |
1012 | ||
1013 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) | |
1014 | { | |
1015 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, | |
1016 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work); | |
1017 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1018 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == | |
1019 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
1020 | ||
c66ac9db NB |
1021 | /* |
1022 | * Update the ALUA metadata buf that has been allocated in | |
1023 | * core_alua_do_port_transition(), this metadata will be written | |
1024 | * to struct file. | |
1025 | * | |
1026 | * Note that there is the case where we do not want to update the | |
1027 | * metadata when the saved metadata is being parsed in userspace | |
1028 | * when setting the existing port access state and access status. | |
1029 | * | |
1030 | * Also note that the failure to write out the ALUA metadata to | |
1031 | * struct file does NOT affect the actual ALUA transition. | |
1032 | */ | |
1033 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1034 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1035 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1036 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1037 | } | |
1038 | /* | |
1039 | * Set the current primary ALUA access state to the requested new state | |
1040 | */ | |
dfbce75a HR |
1041 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1042 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1043 | |
6708bb27 | 1044 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1045 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1046 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1047 | tg_pt_gp->tg_pt_gp_id, |
1048 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1049 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
ee8c07d0 HR |
1050 | |
1051 | core_alua_queue_state_change_ua(tg_pt_gp); | |
1052 | ||
9c6e164c HR |
1053 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1054 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1055 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1056 | ||
1057 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1058 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1059 | } | |
1060 | ||
1061 | static int core_alua_do_transition_tg_pt( | |
1062 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1063 | int new_state, | |
1064 | int explicit) | |
1065 | { | |
1066 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1067 | DECLARE_COMPLETION_ONSTACK(wait); | |
1068 | ||
1069 | /* Nothing to be done here */ | |
1070 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1071 | return 0; | |
1072 | ||
1073 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) | |
1074 | return -EAGAIN; | |
1075 | ||
1076 | /* | |
1077 | * Flush any pending transitions | |
1078 | */ | |
1079 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs && | |
1080 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == | |
1081 | ALUA_ACCESS_STATE_TRANSITION) { | |
1082 | /* Just in case */ | |
1083 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1084 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1085 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); | |
1086 | wait_for_completion(&wait); | |
1087 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * Save the old primary ALUA access state, and set the current state | |
1093 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1094 | */ | |
1095 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1096 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1097 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1098 | ||
1099 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, | |
1100 | ALUA_ACCESS_STATE_TRANSITION); | |
1101 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1102 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1103 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1104 | ||
ee8c07d0 HR |
1105 | core_alua_queue_state_change_ua(tg_pt_gp); |
1106 | ||
9c6e164c HR |
1107 | /* |
1108 | * Check for the optional ALUA primary state transition delay | |
1109 | */ | |
1110 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1111 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1112 | ||
1113 | /* | |
1114 | * Take a reference for workqueue item | |
1115 | */ | |
1116 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1117 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1118 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1119 | ||
1120 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) { | |
1121 | unsigned long transition_tmo; | |
1122 | ||
1123 | transition_tmo = tg_pt_gp->tg_pt_gp_implicit_trans_secs * HZ; | |
1124 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1125 | &tg_pt_gp->tg_pt_gp_transition_work, | |
1126 | transition_tmo); | |
1127 | } else { | |
1128 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1129 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1130 | &tg_pt_gp->tg_pt_gp_transition_work, 0); | |
1131 | wait_for_completion(&wait); | |
1132 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1133 | } | |
c66ac9db NB |
1134 | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | int core_alua_do_port_transition( | |
1139 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1140 | struct se_device *l_dev, | |
adf653f9 | 1141 | struct se_lun *l_lun, |
c66ac9db NB |
1142 | struct se_node_acl *l_nacl, |
1143 | int new_state, | |
125d0119 | 1144 | int explicit) |
c66ac9db NB |
1145 | { |
1146 | struct se_device *dev; | |
c66ac9db NB |
1147 | struct t10_alua_lu_gp *lu_gp; |
1148 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1149 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1150 | int primary, valid_states, rc = 0; |
c66ac9db | 1151 | |
bb91c1a0 HR |
1152 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1153 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) | |
c66ac9db NB |
1154 | return -EINVAL; |
1155 | ||
c66ac9db NB |
1156 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1157 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1158 | lu_gp = local_lu_gp_mem->lu_gp; | |
1159 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1160 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1161 | /* | |
1162 | * For storage objects that are members of the 'default_lu_gp', | |
1163 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1164 | * on all of the matching target port groups IDs in default_lu_gp. | |
1165 | */ | |
6708bb27 | 1166 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1167 | /* |
1168 | * core_alua_do_transition_tg_pt() will always return | |
1169 | * success. | |
1170 | */ | |
adf653f9 | 1171 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1172 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1173 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1174 | new_state, explicit); | |
33940d09 | 1175 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1176 | return rc; |
c66ac9db NB |
1177 | } |
1178 | /* | |
1179 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1180 | * the associated storage objects looking for a matching target port | |
1181 | * group ID from the local target port group. | |
1182 | */ | |
1183 | spin_lock(&lu_gp->lu_gp_lock); | |
1184 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1185 | lu_gp_mem_list) { | |
1186 | ||
1187 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1188 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1189 | spin_unlock(&lu_gp->lu_gp_lock); |
1190 | ||
0fd97ccf | 1191 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1192 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1193 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1194 | tg_pt_gp_list) { |
1195 | ||
6708bb27 | 1196 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1197 | continue; |
1198 | /* | |
1199 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1200 | * is changed for any target port group accessible via |
c66ac9db NB |
1201 | * a logical unit within a LU group, the target port |
1202 | * behavior group asymmetric access states for the same | |
1203 | * target port group accessible via other logical units | |
1204 | * in that LU group will also change. | |
1205 | */ | |
1206 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1207 | continue; | |
1208 | ||
1209 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1210 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1211 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1212 | } else { |
adf653f9 | 1213 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1214 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1215 | } |
33940d09 | 1216 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1217 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1218 | /* |
1219 | * core_alua_do_transition_tg_pt() will always return | |
1220 | * success. | |
1221 | */ | |
9c6e164c HR |
1222 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1223 | new_state, explicit); | |
c66ac9db | 1224 | |
0fd97ccf | 1225 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1226 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1227 | if (rc) |
1228 | break; | |
c66ac9db | 1229 | } |
0fd97ccf | 1230 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1231 | |
1232 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1233 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1234 | } |
1235 | spin_unlock(&lu_gp->lu_gp_lock); | |
1236 | ||
9c6e164c HR |
1237 | if (!rc) { |
1238 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1239 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1240 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1241 | l_tg_pt_gp->tg_pt_gp_id, | |
1242 | (explicit) ? "explicit" : "implicit", | |
1243 | core_alua_dump_state(new_state)); | |
1244 | } | |
c66ac9db | 1245 | |
33940d09 | 1246 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1247 | return rc; |
c66ac9db NB |
1248 | } |
1249 | ||
adf653f9 | 1250 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1251 | { |
adf653f9 | 1252 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1253 | unsigned char *md_buf; |
c66ac9db | 1254 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; |
1e0b9403 HR |
1255 | int len, rc; |
1256 | ||
adf653f9 CH |
1257 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1258 | ||
1e0b9403 HR |
1259 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1260 | if (!md_buf) { | |
1261 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1262 | rc = -ENOMEM; |
1263 | goto out_unlock; | |
1e0b9403 | 1264 | } |
c66ac9db NB |
1265 | |
1266 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1267 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1268 | ||
1269 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1270 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1271 | |
e3d6f909 | 1272 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1273 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1274 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1275 | |
1e0b9403 | 1276 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1277 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1278 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1279 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1280 | |
fdddf932 LD |
1281 | snprintf(path, ALUA_METADATA_PATH_LEN, "%s/alua/%s/%s/lun_%llu", |
1282 | db_root, se_tpg->se_tpg_tfo->get_fabric_name(), wwn, | |
adf653f9 | 1283 | lun->unpacked_lun); |
c66ac9db | 1284 | |
1e0b9403 HR |
1285 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1286 | kfree(md_buf); | |
1287 | ||
adf653f9 CH |
1288 | out_unlock: |
1289 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1290 | return rc; |
c66ac9db NB |
1291 | } |
1292 | ||
1293 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1294 | struct se_lun *lun, |
125d0119 | 1295 | int explicit, |
c66ac9db NB |
1296 | int offline) |
1297 | { | |
1298 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1299 | int trans_delay_msecs; |
1300 | ||
adf653f9 CH |
1301 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1302 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1303 | if (!tg_pt_gp) { |
adf653f9 | 1304 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1305 | pr_err("Unable to complete secondary state" |
c66ac9db | 1306 | " transition\n"); |
e3d6f909 | 1307 | return -EINVAL; |
c66ac9db NB |
1308 | } |
1309 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1310 | /* | |
1311 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1312 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1313 | */ |
1314 | if (offline) | |
adf653f9 | 1315 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1316 | else |
adf653f9 | 1317 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1318 | |
adf653f9 | 1319 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1320 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1321 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1322 | |
6708bb27 | 1323 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1324 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1325 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1326 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1327 | ||
adf653f9 | 1328 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1329 | /* |
1330 | * Do the optional transition delay after we set the secondary | |
1331 | * ALUA access state. | |
1332 | */ | |
1333 | if (trans_delay_msecs != 0) | |
1334 | msleep_interruptible(trans_delay_msecs); | |
1335 | /* | |
1336 | * See if we need to update the ALUA fabric port metadata for | |
1337 | * secondary state and status | |
1338 | */ | |
adf653f9 CH |
1339 | if (lun->lun_tg_pt_secondary_write_md) |
1340 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1341 | |
1342 | return 0; | |
1343 | } | |
1344 | ||
229d4f11 HR |
1345 | struct t10_alua_lba_map * |
1346 | core_alua_allocate_lba_map(struct list_head *list, | |
1347 | u64 first_lba, u64 last_lba) | |
1348 | { | |
1349 | struct t10_alua_lba_map *lba_map; | |
1350 | ||
1351 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1352 | if (!lba_map) { | |
1353 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1354 | return ERR_PTR(-ENOMEM); | |
1355 | } | |
1356 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1357 | lba_map->lba_map_first_lba = first_lba; | |
1358 | lba_map->lba_map_last_lba = last_lba; | |
1359 | ||
1360 | list_add_tail(&lba_map->lba_map_list, list); | |
1361 | return lba_map; | |
1362 | } | |
1363 | ||
1364 | int | |
1365 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1366 | int pg_id, int state) | |
1367 | { | |
1368 | struct t10_alua_lba_map_member *lba_map_mem; | |
1369 | ||
1370 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1371 | lba_map_mem_list) { | |
1372 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1373 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1374 | return -EINVAL; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1379 | if (!lba_map_mem) { | |
1380 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1381 | return -ENOMEM; | |
1382 | } | |
1383 | lba_map_mem->lba_map_mem_alua_state = state; | |
1384 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1385 | ||
1386 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1387 | &lba_map->lba_map_mem_list); | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | void | |
1392 | core_alua_free_lba_map(struct list_head *lba_list) | |
1393 | { | |
1394 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1395 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1396 | ||
1397 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1398 | lba_map_list) { | |
1399 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1400 | &lba_map->lba_map_mem_list, | |
1401 | lba_map_mem_list) { | |
1402 | list_del(&lba_map_mem->lba_map_mem_list); | |
1403 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1404 | lba_map_mem); | |
1405 | } | |
1406 | list_del(&lba_map->lba_map_list); | |
1407 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | void | |
1412 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1413 | int segment_size, int segment_mult) | |
1414 | { | |
1415 | struct list_head old_lba_map_list; | |
1416 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1417 | int activate = 0, supported; | |
1418 | ||
1419 | INIT_LIST_HEAD(&old_lba_map_list); | |
1420 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1421 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1422 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1423 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1424 | if (lba_map_list) { | |
1425 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1426 | activate = 1; | |
1427 | } | |
1428 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1429 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1430 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1431 | tg_pt_gp_list) { | |
1432 | ||
1433 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1434 | continue; | |
1435 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1436 | if (activate) | |
1437 | supported |= ALUA_LBD_SUP; | |
1438 | else | |
1439 | supported &= ~ALUA_LBD_SUP; | |
1440 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1441 | } | |
1442 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1443 | core_alua_free_lba_map(&old_lba_map_list); | |
1444 | } | |
1445 | ||
c66ac9db NB |
1446 | struct t10_alua_lu_gp * |
1447 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1448 | { | |
1449 | struct t10_alua_lu_gp *lu_gp; | |
1450 | ||
1451 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1452 | if (!lu_gp) { |
1453 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1454 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1455 | } |
e3d6f909 | 1456 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1457 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1458 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1459 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1460 | ||
1461 | if (def_group) { | |
e3d6f909 | 1462 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1463 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1464 | alua_lu_gps_count++; |
c66ac9db NB |
1465 | } |
1466 | ||
1467 | return lu_gp; | |
1468 | } | |
1469 | ||
1470 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1471 | { | |
1472 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1473 | u16 lu_gp_id_tmp; | |
1474 | /* | |
1475 | * The lu_gp->lu_gp_id may only be set once.. | |
1476 | */ | |
1477 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1478 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1479 | " ignoring request\n"); |
e3d6f909 | 1480 | return -EINVAL; |
c66ac9db NB |
1481 | } |
1482 | ||
e3d6f909 AG |
1483 | spin_lock(&lu_gps_lock); |
1484 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1485 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1486 | " 0x0000ffff reached\n"); |
e3d6f909 | 1487 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1488 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1489 | return -ENOSPC; |
c66ac9db NB |
1490 | } |
1491 | again: | |
1492 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1493 | alua_lu_gps_counter++; |
c66ac9db | 1494 | |
e3d6f909 | 1495 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1496 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1497 | if (!lu_gp_id) |
c66ac9db NB |
1498 | goto again; |
1499 | ||
6708bb27 | 1500 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1501 | " already exists, ignoring request\n", |
1502 | lu_gp_id); | |
e3d6f909 AG |
1503 | spin_unlock(&lu_gps_lock); |
1504 | return -EINVAL; | |
c66ac9db NB |
1505 | } |
1506 | } | |
1507 | ||
1508 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1509 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1510 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1511 | alua_lu_gps_count++; | |
1512 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1513 | |
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | static struct t10_alua_lu_gp_member * | |
1518 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1519 | { | |
1520 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1521 | ||
1522 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1523 | if (!lu_gp_mem) { |
1524 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1525 | return ERR_PTR(-ENOMEM); |
1526 | } | |
1527 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1528 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1529 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1530 | ||
1531 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1532 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1533 | ||
1534 | return lu_gp_mem; | |
1535 | } | |
1536 | ||
1537 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1538 | { | |
1539 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1540 | /* | |
1541 | * Once we have reached this point, config_item_put() has | |
1542 | * already been called from target_core_alua_drop_lu_gp(). | |
1543 | * | |
1544 | * Here, we remove the *lu_gp from the global list so that | |
1545 | * no associations can be made while we are releasing | |
1546 | * struct t10_alua_lu_gp. | |
1547 | */ | |
e3d6f909 | 1548 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1549 | list_del(&lu_gp->lu_gp_node); |
1550 | alua_lu_gps_count--; | |
1551 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1552 | /* |
1553 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1554 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1555 | * released with core_alua_put_lu_gp_from_name() | |
1556 | */ | |
1557 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1558 | cpu_relax(); | |
1559 | /* | |
1560 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1561 | * struct se_device. | |
1562 | */ | |
1563 | spin_lock(&lu_gp->lu_gp_lock); | |
1564 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1565 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1566 | if (lu_gp_mem->lu_gp_assoc) { | |
1567 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1568 | lu_gp->lu_gp_members--; | |
1569 | lu_gp_mem->lu_gp_assoc = 0; | |
1570 | } | |
1571 | spin_unlock(&lu_gp->lu_gp_lock); | |
1572 | /* | |
1573 | * | |
25985edc | 1574 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1575 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1576 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1577 | * | |
1578 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1579 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1580 | */ |
1581 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1582 | if (lu_gp != default_lu_gp) |
c66ac9db | 1583 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1584 | default_lu_gp); |
c66ac9db NB |
1585 | else |
1586 | lu_gp_mem->lu_gp = NULL; | |
1587 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1588 | ||
1589 | spin_lock(&lu_gp->lu_gp_lock); | |
1590 | } | |
1591 | spin_unlock(&lu_gp->lu_gp_lock); | |
1592 | ||
1593 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1594 | } | |
1595 | ||
1596 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1597 | { | |
c66ac9db NB |
1598 | struct t10_alua_lu_gp *lu_gp; |
1599 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1600 | ||
c66ac9db | 1601 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1602 | if (!lu_gp_mem) |
c66ac9db NB |
1603 | return; |
1604 | ||
1605 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1606 | cpu_relax(); | |
1607 | ||
1608 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1609 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1610 | if (lu_gp) { |
c66ac9db NB |
1611 | spin_lock(&lu_gp->lu_gp_lock); |
1612 | if (lu_gp_mem->lu_gp_assoc) { | |
1613 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1614 | lu_gp->lu_gp_members--; | |
1615 | lu_gp_mem->lu_gp_assoc = 0; | |
1616 | } | |
1617 | spin_unlock(&lu_gp->lu_gp_lock); | |
1618 | lu_gp_mem->lu_gp = NULL; | |
1619 | } | |
1620 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1621 | ||
1622 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1623 | } | |
1624 | ||
1625 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1626 | { | |
1627 | struct t10_alua_lu_gp *lu_gp; | |
1628 | struct config_item *ci; | |
1629 | ||
e3d6f909 AG |
1630 | spin_lock(&lu_gps_lock); |
1631 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1632 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1633 | continue; |
1634 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1635 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1636 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1637 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1638 | return lu_gp; |
1639 | } | |
1640 | } | |
e3d6f909 | 1641 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1642 | |
1643 | return NULL; | |
1644 | } | |
1645 | ||
1646 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1647 | { | |
e3d6f909 | 1648 | spin_lock(&lu_gps_lock); |
c66ac9db | 1649 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1650 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1651 | } |
1652 | ||
1653 | /* | |
1654 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1655 | */ | |
1656 | void __core_alua_attach_lu_gp_mem( | |
1657 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1658 | struct t10_alua_lu_gp *lu_gp) | |
1659 | { | |
1660 | spin_lock(&lu_gp->lu_gp_lock); | |
1661 | lu_gp_mem->lu_gp = lu_gp; | |
1662 | lu_gp_mem->lu_gp_assoc = 1; | |
1663 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1664 | lu_gp->lu_gp_members++; | |
1665 | spin_unlock(&lu_gp->lu_gp_lock); | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1670 | */ | |
1671 | void __core_alua_drop_lu_gp_mem( | |
1672 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1673 | struct t10_alua_lu_gp *lu_gp) | |
1674 | { | |
1675 | spin_lock(&lu_gp->lu_gp_lock); | |
1676 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1677 | lu_gp_mem->lu_gp = NULL; | |
1678 | lu_gp_mem->lu_gp_assoc = 0; | |
1679 | lu_gp->lu_gp_members--; | |
1680 | spin_unlock(&lu_gp->lu_gp_lock); | |
1681 | } | |
1682 | ||
0fd97ccf CH |
1683 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1684 | const char *name, int def_group) | |
c66ac9db NB |
1685 | { |
1686 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1687 | ||
1688 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1689 | if (!tg_pt_gp) { |
1690 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1691 | return NULL; |
1692 | } | |
1693 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1694 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
c66ac9db NB |
1695 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); |
1696 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1697 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
9c6e164c HR |
1698 | INIT_DELAYED_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1699 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1700 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1701 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1702 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1703 | /* |
125d0119 | 1704 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1705 | */ |
1706 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1707 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1708 | /* |
1709 | * Set the default Active/NonOptimized Delay in milliseconds | |
1710 | */ | |
1711 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1712 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1713 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1714 | |
c0dc941e HR |
1715 | /* |
1716 | * Enable all supported states | |
1717 | */ | |
1718 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1719 | ALUA_T_SUP | ALUA_O_SUP | | |
1720 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1721 | ||
c66ac9db | 1722 | if (def_group) { |
0fd97ccf | 1723 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1724 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1725 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1726 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1727 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1728 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1729 | &dev->t10_alua.tg_pt_gps_list); |
1730 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1731 | } |
1732 | ||
1733 | return tg_pt_gp; | |
1734 | } | |
1735 | ||
1736 | int core_alua_set_tg_pt_gp_id( | |
1737 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1738 | u16 tg_pt_gp_id) | |
1739 | { | |
0fd97ccf | 1740 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1741 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1742 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1743 | |
c66ac9db NB |
1744 | /* |
1745 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1746 | */ | |
1747 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1748 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1749 | " ignoring request\n"); |
e3d6f909 | 1750 | return -EINVAL; |
c66ac9db NB |
1751 | } |
1752 | ||
0fd97ccf CH |
1753 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1754 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1755 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1756 | " 0x0000ffff reached\n"); |
0fd97ccf | 1757 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1758 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1759 | return -ENOSPC; |
c66ac9db NB |
1760 | } |
1761 | again: | |
1762 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1763 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1764 | |
0fd97ccf | 1765 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1766 | tg_pt_gp_list) { |
1767 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1768 | if (!tg_pt_gp_id) |
c66ac9db NB |
1769 | goto again; |
1770 | ||
6708bb27 | 1771 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1772 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1773 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1774 | return -EINVAL; |
c66ac9db NB |
1775 | } |
1776 | } | |
1777 | ||
1778 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1779 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1780 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1781 | &dev->t10_alua.tg_pt_gps_list); |
1782 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1783 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1784 | |
1785 | return 0; | |
1786 | } | |
1787 | ||
c66ac9db NB |
1788 | void core_alua_free_tg_pt_gp( |
1789 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1790 | { | |
0fd97ccf | 1791 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1792 | struct se_lun *lun, *next; |
0fd97ccf | 1793 | |
c66ac9db NB |
1794 | /* |
1795 | * Once we have reached this point, config_item_put() has already | |
1796 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1797 | * | |
1798 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1799 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1800 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1801 | */ | |
0fd97ccf | 1802 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1803 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1804 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1805 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1806 | ||
9c6e164c HR |
1807 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1808 | ||
c66ac9db NB |
1809 | /* |
1810 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1811 | * core_alua_get_tg_pt_gp_by_name() in | |
1812 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1813 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1814 | */ | |
1815 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1816 | cpu_relax(); | |
0fd97ccf | 1817 | |
c66ac9db NB |
1818 | /* |
1819 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1820 | * struct se_port. | |
1821 | */ | |
1822 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1823 | list_for_each_entry_safe(lun, next, |
1824 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1825 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1826 | tg_pt_gp->tg_pt_gp_members--; | |
1827 | ||
c66ac9db NB |
1828 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1829 | /* | |
c66ac9db | 1830 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1831 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1832 | * default_tg_pt_gp. |
1833 | */ | |
adf653f9 | 1834 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1835 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1836 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1837 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1838 | } else |
adf653f9 CH |
1839 | lun->lun_tg_pt_gp = NULL; |
1840 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1841 | |
1842 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1843 | } | |
1844 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1845 | ||
1846 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1847 | } | |
1848 | ||
c66ac9db | 1849 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1850 | struct se_device *dev, const char *name) |
c66ac9db NB |
1851 | { |
1852 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1853 | struct config_item *ci; | |
1854 | ||
0fd97ccf CH |
1855 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1856 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1857 | tg_pt_gp_list) { |
6708bb27 | 1858 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1859 | continue; |
1860 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1861 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1862 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1863 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1864 | return tg_pt_gp; |
1865 | } | |
1866 | } | |
0fd97ccf | 1867 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1868 | |
1869 | return NULL; | |
1870 | } | |
1871 | ||
1872 | static void core_alua_put_tg_pt_gp_from_name( | |
1873 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1874 | { | |
0fd97ccf | 1875 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1876 | |
0fd97ccf | 1877 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1878 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1879 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1880 | } |
1881 | ||
adf653f9 CH |
1882 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1883 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1884 | { |
3dd348fc HR |
1885 | struct se_dev_entry *se_deve; |
1886 | ||
adf653f9 CH |
1887 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1888 | ||
c66ac9db | 1889 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1890 | lun->lun_tg_pt_gp = tg_pt_gp; |
1891 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db | 1892 | tg_pt_gp->tg_pt_gp_members++; |
3dd348fc HR |
1893 | spin_lock(&lun->lun_deve_lock); |
1894 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) | |
1895 | core_scsi3_ua_allocate(se_deve, 0x3f, | |
1896 | ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); | |
1897 | spin_unlock(&lun->lun_deve_lock); | |
c66ac9db NB |
1898 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1899 | } | |
1900 | ||
adf653f9 CH |
1901 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1902 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1903 | { |
adf653f9 CH |
1904 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1905 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1906 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1907 | } | |
1908 | ||
1909 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1910 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1911 | { |
adf653f9 CH |
1912 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1913 | ||
c66ac9db | 1914 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1915 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1916 | tg_pt_gp->tg_pt_gp_members--; |
1917 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1918 | |
1919 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1920 | } |
1921 | ||
adf653f9 CH |
1922 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1923 | { | |
1924 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1925 | ||
1926 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1927 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1928 | if (tg_pt_gp) | |
1929 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1930 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1931 | } | |
1932 | ||
1933 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1934 | { |
c66ac9db | 1935 | struct config_item *tg_pt_ci; |
c66ac9db | 1936 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1937 | ssize_t len = 0; |
1938 | ||
adf653f9 CH |
1939 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1940 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1941 | if (tg_pt_gp) { |
c66ac9db NB |
1942 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1943 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1944 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1945 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1946 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1947 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
1948 | core_alua_dump_state(atomic_read( | |
1949 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
1950 | core_alua_dump_status( | |
1951 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1952 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1953 | "Offline" : "None", |
adf653f9 | 1954 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1955 | } |
adf653f9 | 1956 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1957 | |
1958 | return len; | |
1959 | } | |
1960 | ||
1961 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1962 | struct se_lun *lun, |
c66ac9db NB |
1963 | const char *page, |
1964 | size_t count) | |
1965 | { | |
adf653f9 | 1966 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1967 | /* |
1968 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1969 | * reference to se_device->dev_group. | |
1970 | */ | |
1971 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1972 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1973 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1974 | int move = 0; | |
1975 | ||
adf653f9 CH |
1976 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
1977 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
1978 | return -ENODEV; | |
c66ac9db NB |
1979 | |
1980 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1981 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1982 | return -EINVAL; |
1983 | } | |
1984 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1985 | memcpy(buf, page, count); | |
1986 | /* | |
1987 | * Any ALUA target port group alias besides "NULL" means we will be | |
1988 | * making a new group association. | |
1989 | */ | |
1990 | if (strcmp(strstrip(buf), "NULL")) { | |
1991 | /* | |
1992 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1993 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1994 | * core_alua_put_tg_pt_gp_from_name() below. | |
1995 | */ | |
0fd97ccf | 1996 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1997 | strstrip(buf)); |
6708bb27 | 1998 | if (!tg_pt_gp_new) |
c66ac9db NB |
1999 | return -ENODEV; |
2000 | } | |
c66ac9db | 2001 | |
adf653f9 CH |
2002 | spin_lock(&lun->lun_tg_pt_gp_lock); |
2003 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 2004 | if (tg_pt_gp) { |
c66ac9db NB |
2005 | /* |
2006 | * Clearing an existing tg_pt_gp association, and replacing | |
2007 | * with the default_tg_pt_gp. | |
2008 | */ | |
6708bb27 AG |
2009 | if (!tg_pt_gp_new) { |
2010 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
2011 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
2012 | " alua/%s, ID: %hu back to" | |
2013 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
2014 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2015 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2016 | config_item_name(&lun->lun_group.cg_item), |
2017 | config_item_name( | |
2018 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
2019 | tg_pt_gp->tg_pt_gp_id); | |
2020 | ||
adf653f9 CH |
2021 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
2022 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 2023 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 2024 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
2025 | |
2026 | return count; | |
2027 | } | |
adf653f9 | 2028 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
2029 | move = 1; |
2030 | } | |
adf653f9 CH |
2031 | |
2032 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
2033 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 2034 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2035 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2036 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2037 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2038 | config_item_name(&lun->lun_group.cg_item), |
2039 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2040 | tg_pt_gp_new->tg_pt_gp_id); | |
2041 | ||
2042 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2043 | return count; | |
2044 | } | |
2045 | ||
2046 | ssize_t core_alua_show_access_type( | |
2047 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2048 | char *page) | |
2049 | { | |
125d0119 HR |
2050 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2051 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2052 | return sprintf(page, "Implicit and Explicit\n"); | |
2053 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2054 | return sprintf(page, "Implicit\n"); | |
2055 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2056 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2057 | else |
2058 | return sprintf(page, "None\n"); | |
2059 | } | |
2060 | ||
2061 | ssize_t core_alua_store_access_type( | |
2062 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2063 | const char *page, | |
2064 | size_t count) | |
2065 | { | |
2066 | unsigned long tmp; | |
2067 | int ret; | |
2068 | ||
57103d7f | 2069 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2070 | if (ret < 0) { |
6708bb27 | 2071 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2072 | return ret; |
c66ac9db NB |
2073 | } |
2074 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2075 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2076 | " %lu\n", tmp); |
2077 | return -EINVAL; | |
2078 | } | |
2079 | if (tmp == 3) | |
2080 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2081 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2082 | else if (tmp == 2) |
125d0119 | 2083 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2084 | else if (tmp == 1) |
125d0119 | 2085 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2086 | else |
2087 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2088 | ||
2089 | return count; | |
2090 | } | |
2091 | ||
2092 | ssize_t core_alua_show_nonop_delay_msecs( | |
2093 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2094 | char *page) | |
2095 | { | |
2096 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2097 | } | |
2098 | ||
2099 | ssize_t core_alua_store_nonop_delay_msecs( | |
2100 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2101 | const char *page, | |
2102 | size_t count) | |
2103 | { | |
2104 | unsigned long tmp; | |
2105 | int ret; | |
2106 | ||
57103d7f | 2107 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2108 | if (ret < 0) { |
6708bb27 | 2109 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2110 | return ret; |
c66ac9db NB |
2111 | } |
2112 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2113 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2114 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2115 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2116 | return -EINVAL; | |
2117 | } | |
2118 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2119 | ||
2120 | return count; | |
2121 | } | |
2122 | ||
2123 | ssize_t core_alua_show_trans_delay_msecs( | |
2124 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2125 | char *page) | |
2126 | { | |
2127 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2128 | } | |
2129 | ||
2130 | ssize_t core_alua_store_trans_delay_msecs( | |
2131 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2132 | const char *page, | |
2133 | size_t count) | |
2134 | { | |
2135 | unsigned long tmp; | |
2136 | int ret; | |
2137 | ||
57103d7f | 2138 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2139 | if (ret < 0) { |
6708bb27 | 2140 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2141 | return ret; |
c66ac9db NB |
2142 | } |
2143 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2144 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2145 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2146 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2147 | return -EINVAL; | |
2148 | } | |
2149 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2150 | ||
2151 | return count; | |
2152 | } | |
2153 | ||
125d0119 | 2154 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2155 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2156 | char *page) | |
2157 | { | |
125d0119 | 2158 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2159 | } |
2160 | ||
125d0119 | 2161 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2162 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2163 | const char *page, | |
2164 | size_t count) | |
2165 | { | |
2166 | unsigned long tmp; | |
2167 | int ret; | |
2168 | ||
57103d7f | 2169 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2170 | if (ret < 0) { |
125d0119 | 2171 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2172 | return ret; |
5b9a4d72 | 2173 | } |
125d0119 HR |
2174 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2175 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2176 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2177 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2178 | return -EINVAL; |
2179 | } | |
125d0119 | 2180 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2181 | |
2182 | return count; | |
2183 | } | |
2184 | ||
c66ac9db NB |
2185 | ssize_t core_alua_show_preferred_bit( |
2186 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2187 | char *page) | |
2188 | { | |
2189 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2190 | } | |
2191 | ||
2192 | ssize_t core_alua_store_preferred_bit( | |
2193 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2194 | const char *page, | |
2195 | size_t count) | |
2196 | { | |
2197 | unsigned long tmp; | |
2198 | int ret; | |
2199 | ||
57103d7f | 2200 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2201 | if (ret < 0) { |
6708bb27 | 2202 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2203 | return ret; |
c66ac9db NB |
2204 | } |
2205 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2206 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2207 | return -EINVAL; |
2208 | } | |
2209 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2210 | ||
2211 | return count; | |
2212 | } | |
2213 | ||
2214 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2215 | { | |
c66ac9db | 2216 | return sprintf(page, "%d\n", |
adf653f9 | 2217 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2218 | } |
2219 | ||
2220 | ssize_t core_alua_store_offline_bit( | |
2221 | struct se_lun *lun, | |
2222 | const char *page, | |
2223 | size_t count) | |
2224 | { | |
4cc987ea NB |
2225 | /* |
2226 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2227 | * reference to se_device->dev_group. | |
2228 | */ | |
2229 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2230 | unsigned long tmp; |
2231 | int ret; | |
2232 | ||
adf653f9 CH |
2233 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
2234 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
c66ac9db NB |
2235 | return -ENODEV; |
2236 | ||
57103d7f | 2237 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2238 | if (ret < 0) { |
6708bb27 | 2239 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2240 | return ret; |
c66ac9db NB |
2241 | } |
2242 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2243 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2244 | tmp); |
2245 | return -EINVAL; | |
2246 | } | |
c66ac9db | 2247 | |
adf653f9 | 2248 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2249 | if (ret < 0) |
2250 | return -EINVAL; | |
2251 | ||
2252 | return count; | |
2253 | } | |
2254 | ||
2255 | ssize_t core_alua_show_secondary_status( | |
2256 | struct se_lun *lun, | |
2257 | char *page) | |
2258 | { | |
adf653f9 | 2259 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2260 | } |
2261 | ||
2262 | ssize_t core_alua_store_secondary_status( | |
2263 | struct se_lun *lun, | |
2264 | const char *page, | |
2265 | size_t count) | |
2266 | { | |
2267 | unsigned long tmp; | |
2268 | int ret; | |
2269 | ||
57103d7f | 2270 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2271 | if (ret < 0) { |
6708bb27 | 2272 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2273 | return ret; |
c66ac9db NB |
2274 | } |
2275 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2276 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2277 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2278 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2279 | tmp); |
2280 | return -EINVAL; | |
2281 | } | |
adf653f9 | 2282 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2283 | |
2284 | return count; | |
2285 | } | |
2286 | ||
2287 | ssize_t core_alua_show_secondary_write_metadata( | |
2288 | struct se_lun *lun, | |
2289 | char *page) | |
2290 | { | |
adf653f9 | 2291 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2292 | } |
2293 | ||
2294 | ssize_t core_alua_store_secondary_write_metadata( | |
2295 | struct se_lun *lun, | |
2296 | const char *page, | |
2297 | size_t count) | |
2298 | { | |
2299 | unsigned long tmp; | |
2300 | int ret; | |
2301 | ||
57103d7f | 2302 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2303 | if (ret < 0) { |
6708bb27 | 2304 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2305 | return ret; |
c66ac9db NB |
2306 | } |
2307 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2308 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2309 | " %lu\n", tmp); |
2310 | return -EINVAL; | |
2311 | } | |
adf653f9 | 2312 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2313 | |
2314 | return count; | |
2315 | } | |
2316 | ||
0fd97ccf | 2317 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2318 | { |
a3541703 | 2319 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && |
c87fbd56 CH |
2320 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2321 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2322 | |
c66ac9db | 2323 | /* |
25985edc | 2324 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2325 | * LUN Group. |
2326 | */ | |
2327 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2328 | if (IS_ERR(lu_gp_mem)) |
2329 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2330 | |
c66ac9db NB |
2331 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2332 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2333 | default_lu_gp); |
c66ac9db NB |
2334 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2335 | ||
6708bb27 | 2336 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2337 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2338 | dev->transport->name); |
c66ac9db NB |
2339 | } |
2340 | ||
2341 | return 0; | |
2342 | } |