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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_alua.c | |
3 | * | |
4 | * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA) | |
5 | * | |
4c76251e | 6 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/slab.h> |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/configfs.h> | |
8dcf07be | 29 | #include <linux/delay.h> |
c53181af | 30 | #include <linux/export.h> |
8dcf07be | 31 | #include <linux/fcntl.h> |
0e9b10a9 | 32 | #include <linux/file.h> |
8dcf07be | 33 | #include <linux/fs.h> |
ba929992 | 34 | #include <scsi/scsi_proto.h> |
33395fb8 | 35 | #include <asm/unaligned.h> |
c66ac9db NB |
36 | |
37 | #include <target/target_core_base.h> | |
c4795fb2 CH |
38 | #include <target/target_core_backend.h> |
39 | #include <target/target_core_fabric.h> | |
c66ac9db | 40 | |
e26d99ae | 41 | #include "target_core_internal.h" |
c66ac9db | 42 | #include "target_core_alua.h" |
c66ac9db NB |
43 | #include "target_core_ua.h" |
44 | ||
bb91c1a0 | 45 | static sense_reason_t core_alua_check_transition(int state, int valid, |
1ca4d4fa | 46 | int *primary, int explicit); |
c66ac9db | 47 | static int core_alua_set_tg_pt_secondary_state( |
adf653f9 | 48 | struct se_lun *lun, int explicit, int offline); |
c66ac9db | 49 | |
bb91c1a0 HR |
50 | static char *core_alua_dump_state(int state); |
51 | ||
adf653f9 CH |
52 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
53 | struct t10_alua_tg_pt_gp *tg_pt_gp); | |
54 | ||
e3d6f909 AG |
55 | static u16 alua_lu_gps_counter; |
56 | static u32 alua_lu_gps_count; | |
57 | ||
58 | static DEFINE_SPINLOCK(lu_gps_lock); | |
59 | static LIST_HEAD(lu_gps_list); | |
60 | ||
61 | struct t10_alua_lu_gp *default_lu_gp; | |
62 | ||
c66094bf HR |
63 | /* |
64 | * REPORT REFERRALS | |
65 | * | |
66 | * See sbc3r35 section 5.23 | |
67 | */ | |
68 | sense_reason_t | |
69 | target_emulate_report_referrals(struct se_cmd *cmd) | |
70 | { | |
71 | struct se_device *dev = cmd->se_dev; | |
72 | struct t10_alua_lba_map *map; | |
73 | struct t10_alua_lba_map_member *map_mem; | |
74 | unsigned char *buf; | |
75 | u32 rd_len = 0, off; | |
76 | ||
77 | if (cmd->data_length < 4) { | |
78 | pr_warn("REPORT REFERRALS allocation length %u too" | |
79 | " small\n", cmd->data_length); | |
80 | return TCM_INVALID_CDB_FIELD; | |
81 | } | |
82 | ||
83 | buf = transport_kmap_data_sg(cmd); | |
84 | if (!buf) | |
85 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
86 | ||
87 | off = 4; | |
88 | spin_lock(&dev->t10_alua.lba_map_lock); | |
89 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
90 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
91 | transport_kunmap_data_sg(cmd); | |
92 | ||
93 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
94 | } | |
95 | ||
96 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
97 | lba_map_list) { | |
98 | int desc_num = off + 3; | |
99 | int pg_num; | |
100 | ||
101 | off += 4; | |
38edd724 HR |
102 | if (cmd->data_length > off) |
103 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 104 | off += 8; |
38edd724 HR |
105 | if (cmd->data_length > off) |
106 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
107 | off += 8; |
108 | rd_len += 20; | |
109 | pg_num = 0; | |
110 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
111 | lba_map_mem_list) { | |
38edd724 HR |
112 | int alua_state = map_mem->lba_map_mem_alua_state; |
113 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
114 | ||
115 | if (cmd->data_length > off) | |
116 | buf[off] = alua_state & 0x0f; | |
117 | off += 2; | |
118 | if (cmd->data_length > off) | |
119 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
120 | off++; | |
121 | if (cmd->data_length > off) | |
122 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 123 | off++; |
c66094bf HR |
124 | rd_len += 4; |
125 | pg_num++; | |
126 | } | |
38edd724 HR |
127 | if (cmd->data_length > desc_num) |
128 | buf[desc_num] = pg_num; | |
c66094bf HR |
129 | } |
130 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
131 | ||
132 | /* | |
133 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
134 | */ | |
135 | put_unaligned_be16(rd_len, &buf[2]); | |
136 | ||
137 | transport_kunmap_data_sg(cmd); | |
138 | ||
139 | target_complete_cmd(cmd, GOOD); | |
140 | return 0; | |
141 | } | |
142 | ||
c66ac9db NB |
143 | /* |
144 | * REPORT_TARGET_PORT_GROUPS | |
145 | * | |
146 | * See spc4r17 section 6.27 | |
147 | */ | |
de103c93 CH |
148 | sense_reason_t |
149 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 150 | { |
0fd97ccf | 151 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 152 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
adf653f9 | 153 | struct se_lun *lun; |
05d1c7c0 | 154 | unsigned char *buf; |
5b9a4d72 NB |
155 | u32 rd_len = 0, off; |
156 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 157 | |
6b20fa9a | 158 | /* |
5b9a4d72 NB |
159 | * Skip over RESERVED area to first Target port group descriptor |
160 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 161 | */ |
5b9a4d72 NB |
162 | if (ext_hdr != 0) |
163 | off = 8; | |
164 | else | |
165 | off = 4; | |
166 | ||
167 | if (cmd->data_length < off) { | |
168 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
169 | " small for %s header\n", cmd->data_length, | |
170 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 171 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 172 | } |
4949314c | 173 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
174 | if (!buf) |
175 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 176 | |
0fd97ccf CH |
177 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
178 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 179 | tg_pt_gp_list) { |
6b20fa9a NB |
180 | /* |
181 | * Check if the Target port group and Target port descriptor list | |
182 | * based on tg_pt_gp_members count will fit into the response payload. | |
183 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
184 | * the allocation length and the response is truncated. | |
185 | */ | |
186 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
187 | cmd->data_length) { | |
188 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
189 | continue; | |
190 | } | |
c66ac9db NB |
191 | /* |
192 | * PREF: Preferred target port bit, determine if this | |
193 | * bit should be set for port group. | |
194 | */ | |
195 | if (tg_pt_gp->tg_pt_gp_pref) | |
196 | buf[off] = 0x80; | |
197 | /* | |
198 | * Set the ASYMMETRIC ACCESS State | |
199 | */ | |
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 | */ | |
1ca4d4fa MC |
338 | rc = core_alua_check_transition(alua_access_state, valid_states, |
339 | &primary, 1); | |
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; | |
530c6891 | 694 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) |
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 |
1ca4d4fa | 765 | core_alua_check_transition(int state, int valid, int *primary, int explicit) |
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 | 806 | case ALUA_ACCESS_STATE_TRANSITION: |
1ca4d4fa MC |
807 | if (!(valid & ALUA_T_SUP) || explicit) |
808 | /* | |
809 | * Transitioning is set internally and by tcmu daemon, | |
810 | * and cannot be selected through a STPG. | |
811 | */ | |
812 | goto not_supported; | |
813 | *primary = 0; | |
814 | break; | |
c66ac9db | 815 | default: |
6708bb27 | 816 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 817 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
818 | } |
819 | ||
820 | return 0; | |
bb91c1a0 HR |
821 | |
822 | not_supported: | |
823 | pr_err("ALUA access state %s not supported", | |
824 | core_alua_dump_state(state)); | |
825 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
826 | } |
827 | ||
828 | static char *core_alua_dump_state(int state) | |
829 | { | |
830 | switch (state) { | |
73f3bf51 | 831 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
832 | return "Active/Optimized"; |
833 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
834 | return "Active/NonOptimized"; | |
c66094bf HR |
835 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
836 | return "LBA Dependent"; | |
c66ac9db NB |
837 | case ALUA_ACCESS_STATE_STANDBY: |
838 | return "Standby"; | |
839 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
840 | return "Unavailable"; | |
841 | case ALUA_ACCESS_STATE_OFFLINE: | |
842 | return "Offline"; | |
bb91c1a0 HR |
843 | case ALUA_ACCESS_STATE_TRANSITION: |
844 | return "Transitioning"; | |
c66ac9db NB |
845 | default: |
846 | return "Unknown"; | |
847 | } | |
848 | ||
849 | return NULL; | |
850 | } | |
851 | ||
852 | char *core_alua_dump_status(int status) | |
853 | { | |
854 | switch (status) { | |
855 | case ALUA_STATUS_NONE: | |
856 | return "None"; | |
125d0119 HR |
857 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
858 | return "Altered by Explicit STPG"; | |
859 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
860 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
861 | default: |
862 | return "Unknown"; | |
863 | } | |
864 | ||
865 | return NULL; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Used by fabric modules to determine when we need to delay processing | |
870 | * for the Active/NonOptimized paths.. | |
871 | */ | |
872 | int core_alua_check_nonop_delay( | |
873 | struct se_cmd *cmd) | |
874 | { | |
875 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
876 | return 0; | |
877 | if (in_interrupt()) | |
878 | return 0; | |
879 | /* | |
880 | * The ALUA Active/NonOptimized access state delay can be disabled | |
881 | * in via configfs with a value of zero | |
882 | */ | |
6708bb27 | 883 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
884 | return 0; |
885 | /* | |
886 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
887 | * defined interval in core_alua_state_nonoptimized() | |
888 | */ | |
889 | msleep_interruptible(cmd->alua_nonop_delay); | |
890 | return 0; | |
891 | } | |
892 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
893 | ||
c66ac9db NB |
894 | static int core_alua_write_tpg_metadata( |
895 | const char *path, | |
896 | unsigned char *md_buf, | |
897 | u32 md_buf_len) | |
898 | { | |
0e9b10a9 AV |
899 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
900 | int ret; | |
c66ac9db | 901 | |
0e9b10a9 AV |
902 | if (IS_ERR(file)) { |
903 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
904 | return -ENODEV; |
905 | } | |
0e9b10a9 AV |
906 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
907 | if (ret < 0) | |
6708bb27 | 908 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 909 | fput(file); |
f730f915 | 910 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
911 | } |
912 | ||
913 | /* | |
914 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held | |
915 | */ | |
916 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 917 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 918 | { |
1e0b9403 | 919 | unsigned char *md_buf; |
0fd97ccf | 920 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
c66ac9db | 921 | char path[ALUA_METADATA_PATH_LEN]; |
1e0b9403 HR |
922 | int len, rc; |
923 | ||
924 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
925 | if (!md_buf) { | |
926 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
927 | return -ENOMEM; | |
928 | } | |
c66ac9db NB |
929 | |
930 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
931 | ||
1e0b9403 | 932 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
933 | "tg_pt_gp_id=%hu\n" |
934 | "alua_access_state=0x%02x\n" | |
935 | "alua_access_status=0x%02x\n", | |
9c6e164c HR |
936 | tg_pt_gp->tg_pt_gp_id, |
937 | tg_pt_gp->tg_pt_gp_alua_pending_state, | |
c66ac9db NB |
938 | tg_pt_gp->tg_pt_gp_alua_access_status); |
939 | ||
940 | snprintf(path, ALUA_METADATA_PATH_LEN, | |
fdddf932 | 941 | "%s/alua/tpgs_%s/%s", db_root, &wwn->unit_serial[0], |
c66ac9db NB |
942 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); |
943 | ||
1e0b9403 HR |
944 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
945 | kfree(md_buf); | |
946 | return rc; | |
c66ac9db NB |
947 | } |
948 | ||
ee8c07d0 | 949 | static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db NB |
950 | { |
951 | struct se_dev_entry *se_deve; | |
adf653f9 | 952 | struct se_lun *lun; |
c66ac9db | 953 | struct se_lun_acl *lacl; |
c66ac9db NB |
954 | |
955 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
956 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
957 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
958 | /* |
959 | * After an implicit target port asymmetric access state | |
960 | * change, a device server shall establish a unit attention | |
961 | * condition for the initiator port associated with every I_T | |
962 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 963 | * ACCESS STATE CHANGED. |
c66ac9db NB |
964 | * |
965 | * After an explicit target port asymmetric access state | |
966 | * change, a device server shall establish a unit attention | |
967 | * condition with the additional sense code set to ASYMMETRIC | |
968 | * ACCESS STATE CHANGED for the initiator port associated with | |
969 | * every I_T nexus other than the I_T nexus on which the SET | |
970 | * TARGET PORT GROUPS command | |
971 | */ | |
9e37d042 NB |
972 | if (!percpu_ref_tryget_live(&lun->lun_ref)) |
973 | continue; | |
c66ac9db NB |
974 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
975 | ||
1adff1b3 | 976 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 977 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) { |
29a05dee | 978 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
adf653f9 | 979 | lockdep_is_held(&lun->lun_deve_lock)); |
c51c8e7b | 980 | |
c66ac9db | 981 | /* |
c51c8e7b HR |
982 | * spc4r37 p.242: |
983 | * After an explicit target port asymmetric access | |
984 | * state change, a device server shall establish a | |
985 | * unit attention condition with the additional sense | |
986 | * code set to ASYMMETRIC ACCESS STATE CHANGED for | |
987 | * the initiator port associated with every I_T nexus | |
988 | * other than the I_T nexus on which the SET TARGET | |
989 | * PORT GROUPS command was received. | |
c66ac9db | 990 | */ |
9c6e164c HR |
991 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
992 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
adf653f9 CH |
993 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
994 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
995 | continue; |
996 | ||
c51c8e7b HR |
997 | /* |
998 | * se_deve->se_lun_acl pointer may be NULL for a | |
999 | * entry created without explicit Node+MappedLUN ACLs | |
1000 | */ | |
1001 | if (lacl && (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
1002 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl)) | |
1003 | continue; | |
1004 | ||
1005 | core_scsi3_ua_allocate(se_deve, 0x2A, | |
c66ac9db NB |
1006 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); |
1007 | } | |
1adff1b3 | 1008 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db NB |
1009 | |
1010 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 1011 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
1012 | } |
1013 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
ee8c07d0 HR |
1014 | } |
1015 | ||
1016 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) | |
1017 | { | |
1018 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, | |
d7175373 | 1019 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work); |
ee8c07d0 HR |
1020 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
1021 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == | |
1022 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
1023 | ||
c66ac9db NB |
1024 | /* |
1025 | * Update the ALUA metadata buf that has been allocated in | |
1026 | * core_alua_do_port_transition(), this metadata will be written | |
1027 | * to struct file. | |
1028 | * | |
1029 | * Note that there is the case where we do not want to update the | |
1030 | * metadata when the saved metadata is being parsed in userspace | |
1031 | * when setting the existing port access state and access status. | |
1032 | * | |
1033 | * Also note that the failure to write out the ALUA metadata to | |
1034 | * struct file does NOT affect the actual ALUA transition. | |
1035 | */ | |
1036 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1037 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1038 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1039 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1040 | } | |
1041 | /* | |
1042 | * Set the current primary ALUA access state to the requested new state | |
1043 | */ | |
dfbce75a HR |
1044 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1045 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1046 | |
6708bb27 | 1047 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1048 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1049 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1050 | tg_pt_gp->tg_pt_gp_id, |
1051 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1052 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
ee8c07d0 HR |
1053 | |
1054 | core_alua_queue_state_change_ua(tg_pt_gp); | |
1055 | ||
9c6e164c HR |
1056 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1057 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1058 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1059 | ||
1060 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1061 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1062 | } | |
1063 | ||
1064 | static int core_alua_do_transition_tg_pt( | |
1065 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1066 | int new_state, | |
1067 | int explicit) | |
1068 | { | |
1069 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1070 | DECLARE_COMPLETION_ONSTACK(wait); | |
1071 | ||
1072 | /* Nothing to be done here */ | |
1073 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1074 | return 0; | |
1075 | ||
1ca4d4fa | 1076 | if (explicit && new_state == ALUA_ACCESS_STATE_TRANSITION) |
9c6e164c HR |
1077 | return -EAGAIN; |
1078 | ||
1079 | /* | |
1080 | * Flush any pending transitions | |
1081 | */ | |
760bf578 | 1082 | if (!explicit) |
d7175373 | 1083 | flush_work(&tg_pt_gp->tg_pt_gp_transition_work); |
9c6e164c HR |
1084 | |
1085 | /* | |
1086 | * Save the old primary ALUA access state, and set the current state | |
1087 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1088 | */ | |
9c6e164c HR |
1089 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1090 | ALUA_ACCESS_STATE_TRANSITION); | |
1091 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1092 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1093 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1094 | ||
ee8c07d0 HR |
1095 | core_alua_queue_state_change_ua(tg_pt_gp); |
1096 | ||
1ca4d4fa MC |
1097 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) |
1098 | return 0; | |
1099 | ||
1100 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1101 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1102 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1103 | ||
9c6e164c HR |
1104 | /* |
1105 | * Check for the optional ALUA primary state transition delay | |
1106 | */ | |
1107 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1108 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1109 | ||
1110 | /* | |
1111 | * Take a reference for workqueue item | |
1112 | */ | |
1113 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1114 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1115 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1116 | ||
d7175373 MC |
1117 | schedule_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1118 | if (explicit) { | |
9c6e164c | 1119 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; |
9c6e164c HR |
1120 | wait_for_completion(&wait); |
1121 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1122 | } | |
c66ac9db NB |
1123 | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | int core_alua_do_port_transition( | |
1128 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1129 | struct se_device *l_dev, | |
adf653f9 | 1130 | struct se_lun *l_lun, |
c66ac9db NB |
1131 | struct se_node_acl *l_nacl, |
1132 | int new_state, | |
125d0119 | 1133 | int explicit) |
c66ac9db NB |
1134 | { |
1135 | struct se_device *dev; | |
c66ac9db NB |
1136 | struct t10_alua_lu_gp *lu_gp; |
1137 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1138 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1139 | int primary, valid_states, rc = 0; |
c66ac9db | 1140 | |
0a414572 MC |
1141 | if (l_dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) |
1142 | return -ENODEV; | |
1143 | ||
bb91c1a0 | 1144 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1ca4d4fa MC |
1145 | if (core_alua_check_transition(new_state, valid_states, &primary, |
1146 | explicit) != 0) | |
c66ac9db NB |
1147 | return -EINVAL; |
1148 | ||
c66ac9db NB |
1149 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1150 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1151 | lu_gp = local_lu_gp_mem->lu_gp; | |
1152 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1153 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1154 | /* | |
1155 | * For storage objects that are members of the 'default_lu_gp', | |
1156 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1157 | * on all of the matching target port groups IDs in default_lu_gp. | |
1158 | */ | |
6708bb27 | 1159 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1160 | /* |
1161 | * core_alua_do_transition_tg_pt() will always return | |
1162 | * success. | |
1163 | */ | |
adf653f9 | 1164 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1165 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1166 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1167 | new_state, explicit); | |
33940d09 | 1168 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1169 | return rc; |
c66ac9db NB |
1170 | } |
1171 | /* | |
1172 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1173 | * the associated storage objects looking for a matching target port | |
1174 | * group ID from the local target port group. | |
1175 | */ | |
1176 | spin_lock(&lu_gp->lu_gp_lock); | |
1177 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1178 | lu_gp_mem_list) { | |
1179 | ||
1180 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1181 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1182 | spin_unlock(&lu_gp->lu_gp_lock); |
1183 | ||
0fd97ccf | 1184 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1185 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1186 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1187 | tg_pt_gp_list) { |
1188 | ||
6708bb27 | 1189 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1190 | continue; |
1191 | /* | |
1192 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1193 | * is changed for any target port group accessible via |
c66ac9db NB |
1194 | * a logical unit within a LU group, the target port |
1195 | * behavior group asymmetric access states for the same | |
1196 | * target port group accessible via other logical units | |
1197 | * in that LU group will also change. | |
1198 | */ | |
1199 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1200 | continue; | |
1201 | ||
1202 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1203 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1204 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1205 | } else { |
adf653f9 | 1206 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1207 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1208 | } |
33940d09 | 1209 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1210 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1211 | /* |
1212 | * core_alua_do_transition_tg_pt() will always return | |
1213 | * success. | |
1214 | */ | |
9c6e164c HR |
1215 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1216 | new_state, explicit); | |
c66ac9db | 1217 | |
0fd97ccf | 1218 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1219 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1220 | if (rc) |
1221 | break; | |
c66ac9db | 1222 | } |
0fd97ccf | 1223 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1224 | |
1225 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1226 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1227 | } |
1228 | spin_unlock(&lu_gp->lu_gp_lock); | |
1229 | ||
9c6e164c HR |
1230 | if (!rc) { |
1231 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1232 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1233 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1234 | l_tg_pt_gp->tg_pt_gp_id, | |
1235 | (explicit) ? "explicit" : "implicit", | |
1236 | core_alua_dump_state(new_state)); | |
1237 | } | |
c66ac9db | 1238 | |
33940d09 | 1239 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1240 | return rc; |
c66ac9db NB |
1241 | } |
1242 | ||
adf653f9 | 1243 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1244 | { |
adf653f9 | 1245 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1246 | unsigned char *md_buf; |
c66ac9db | 1247 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; |
1e0b9403 HR |
1248 | int len, rc; |
1249 | ||
adf653f9 CH |
1250 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1251 | ||
1e0b9403 HR |
1252 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1253 | if (!md_buf) { | |
1254 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1255 | rc = -ENOMEM; |
1256 | goto out_unlock; | |
1e0b9403 | 1257 | } |
c66ac9db NB |
1258 | |
1259 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1260 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1261 | ||
1262 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1263 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1264 | |
e3d6f909 | 1265 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1266 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1267 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1268 | |
1e0b9403 | 1269 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1270 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1271 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1272 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1273 | |
fdddf932 LD |
1274 | snprintf(path, ALUA_METADATA_PATH_LEN, "%s/alua/%s/%s/lun_%llu", |
1275 | db_root, se_tpg->se_tpg_tfo->get_fabric_name(), wwn, | |
adf653f9 | 1276 | lun->unpacked_lun); |
c66ac9db | 1277 | |
1e0b9403 HR |
1278 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1279 | kfree(md_buf); | |
1280 | ||
adf653f9 CH |
1281 | out_unlock: |
1282 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1283 | return rc; |
c66ac9db NB |
1284 | } |
1285 | ||
1286 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1287 | struct se_lun *lun, |
125d0119 | 1288 | int explicit, |
c66ac9db NB |
1289 | int offline) |
1290 | { | |
1291 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1292 | int trans_delay_msecs; |
1293 | ||
adf653f9 CH |
1294 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1295 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1296 | if (!tg_pt_gp) { |
adf653f9 | 1297 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1298 | pr_err("Unable to complete secondary state" |
c66ac9db | 1299 | " transition\n"); |
e3d6f909 | 1300 | return -EINVAL; |
c66ac9db NB |
1301 | } |
1302 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1303 | /* | |
1304 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1305 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1306 | */ |
1307 | if (offline) | |
adf653f9 | 1308 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1309 | else |
adf653f9 | 1310 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1311 | |
adf653f9 | 1312 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1313 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1314 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1315 | |
6708bb27 | 1316 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1317 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1318 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1319 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1320 | ||
adf653f9 | 1321 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1322 | /* |
1323 | * Do the optional transition delay after we set the secondary | |
1324 | * ALUA access state. | |
1325 | */ | |
1326 | if (trans_delay_msecs != 0) | |
1327 | msleep_interruptible(trans_delay_msecs); | |
1328 | /* | |
1329 | * See if we need to update the ALUA fabric port metadata for | |
1330 | * secondary state and status | |
1331 | */ | |
adf653f9 CH |
1332 | if (lun->lun_tg_pt_secondary_write_md) |
1333 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1334 | |
1335 | return 0; | |
1336 | } | |
1337 | ||
229d4f11 HR |
1338 | struct t10_alua_lba_map * |
1339 | core_alua_allocate_lba_map(struct list_head *list, | |
1340 | u64 first_lba, u64 last_lba) | |
1341 | { | |
1342 | struct t10_alua_lba_map *lba_map; | |
1343 | ||
1344 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1345 | if (!lba_map) { | |
1346 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1347 | return ERR_PTR(-ENOMEM); | |
1348 | } | |
1349 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1350 | lba_map->lba_map_first_lba = first_lba; | |
1351 | lba_map->lba_map_last_lba = last_lba; | |
1352 | ||
1353 | list_add_tail(&lba_map->lba_map_list, list); | |
1354 | return lba_map; | |
1355 | } | |
1356 | ||
1357 | int | |
1358 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1359 | int pg_id, int state) | |
1360 | { | |
1361 | struct t10_alua_lba_map_member *lba_map_mem; | |
1362 | ||
1363 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1364 | lba_map_mem_list) { | |
1365 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1366 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1367 | return -EINVAL; | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1372 | if (!lba_map_mem) { | |
1373 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1374 | return -ENOMEM; | |
1375 | } | |
1376 | lba_map_mem->lba_map_mem_alua_state = state; | |
1377 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1378 | ||
1379 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1380 | &lba_map->lba_map_mem_list); | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | void | |
1385 | core_alua_free_lba_map(struct list_head *lba_list) | |
1386 | { | |
1387 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1388 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1389 | ||
1390 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1391 | lba_map_list) { | |
1392 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1393 | &lba_map->lba_map_mem_list, | |
1394 | lba_map_mem_list) { | |
1395 | list_del(&lba_map_mem->lba_map_mem_list); | |
1396 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1397 | lba_map_mem); | |
1398 | } | |
1399 | list_del(&lba_map->lba_map_list); | |
1400 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | void | |
1405 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1406 | int segment_size, int segment_mult) | |
1407 | { | |
1408 | struct list_head old_lba_map_list; | |
1409 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1410 | int activate = 0, supported; | |
1411 | ||
1412 | INIT_LIST_HEAD(&old_lba_map_list); | |
1413 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1414 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1415 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1416 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1417 | if (lba_map_list) { | |
1418 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1419 | activate = 1; | |
1420 | } | |
1421 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1422 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1423 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1424 | tg_pt_gp_list) { | |
1425 | ||
1426 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1427 | continue; | |
1428 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1429 | if (activate) | |
1430 | supported |= ALUA_LBD_SUP; | |
1431 | else | |
1432 | supported &= ~ALUA_LBD_SUP; | |
1433 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1434 | } | |
1435 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1436 | core_alua_free_lba_map(&old_lba_map_list); | |
1437 | } | |
1438 | ||
c66ac9db NB |
1439 | struct t10_alua_lu_gp * |
1440 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1441 | { | |
1442 | struct t10_alua_lu_gp *lu_gp; | |
1443 | ||
1444 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1445 | if (!lu_gp) { |
1446 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1447 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1448 | } |
e3d6f909 | 1449 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1450 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1451 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1452 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1453 | ||
1454 | if (def_group) { | |
e3d6f909 | 1455 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1456 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1457 | alua_lu_gps_count++; |
c66ac9db NB |
1458 | } |
1459 | ||
1460 | return lu_gp; | |
1461 | } | |
1462 | ||
1463 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1464 | { | |
1465 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1466 | u16 lu_gp_id_tmp; | |
1467 | /* | |
1468 | * The lu_gp->lu_gp_id may only be set once.. | |
1469 | */ | |
1470 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1471 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1472 | " ignoring request\n"); |
e3d6f909 | 1473 | return -EINVAL; |
c66ac9db NB |
1474 | } |
1475 | ||
e3d6f909 AG |
1476 | spin_lock(&lu_gps_lock); |
1477 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1478 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1479 | " 0x0000ffff reached\n"); |
e3d6f909 | 1480 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1481 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1482 | return -ENOSPC; |
c66ac9db NB |
1483 | } |
1484 | again: | |
1485 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1486 | alua_lu_gps_counter++; |
c66ac9db | 1487 | |
e3d6f909 | 1488 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1489 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1490 | if (!lu_gp_id) |
c66ac9db NB |
1491 | goto again; |
1492 | ||
6708bb27 | 1493 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1494 | " already exists, ignoring request\n", |
1495 | lu_gp_id); | |
e3d6f909 AG |
1496 | spin_unlock(&lu_gps_lock); |
1497 | return -EINVAL; | |
c66ac9db NB |
1498 | } |
1499 | } | |
1500 | ||
1501 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1502 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1503 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1504 | alua_lu_gps_count++; | |
1505 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1506 | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static struct t10_alua_lu_gp_member * | |
1511 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1512 | { | |
1513 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1514 | ||
1515 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1516 | if (!lu_gp_mem) { |
1517 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1518 | return ERR_PTR(-ENOMEM); |
1519 | } | |
1520 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1521 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1522 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1523 | ||
1524 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1525 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1526 | ||
1527 | return lu_gp_mem; | |
1528 | } | |
1529 | ||
1530 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1531 | { | |
1532 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1533 | /* | |
1534 | * Once we have reached this point, config_item_put() has | |
1535 | * already been called from target_core_alua_drop_lu_gp(). | |
1536 | * | |
1537 | * Here, we remove the *lu_gp from the global list so that | |
1538 | * no associations can be made while we are releasing | |
1539 | * struct t10_alua_lu_gp. | |
1540 | */ | |
e3d6f909 | 1541 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1542 | list_del(&lu_gp->lu_gp_node); |
1543 | alua_lu_gps_count--; | |
1544 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1545 | /* |
1546 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1547 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1548 | * released with core_alua_put_lu_gp_from_name() | |
1549 | */ | |
1550 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1551 | cpu_relax(); | |
1552 | /* | |
1553 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1554 | * struct se_device. | |
1555 | */ | |
1556 | spin_lock(&lu_gp->lu_gp_lock); | |
1557 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1558 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1559 | if (lu_gp_mem->lu_gp_assoc) { | |
1560 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1561 | lu_gp->lu_gp_members--; | |
1562 | lu_gp_mem->lu_gp_assoc = 0; | |
1563 | } | |
1564 | spin_unlock(&lu_gp->lu_gp_lock); | |
1565 | /* | |
1566 | * | |
25985edc | 1567 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1568 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1569 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1570 | * | |
1571 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1572 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1573 | */ |
1574 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1575 | if (lu_gp != default_lu_gp) |
c66ac9db | 1576 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1577 | default_lu_gp); |
c66ac9db NB |
1578 | else |
1579 | lu_gp_mem->lu_gp = NULL; | |
1580 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1581 | ||
1582 | spin_lock(&lu_gp->lu_gp_lock); | |
1583 | } | |
1584 | spin_unlock(&lu_gp->lu_gp_lock); | |
1585 | ||
1586 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1587 | } | |
1588 | ||
1589 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1590 | { | |
c66ac9db NB |
1591 | struct t10_alua_lu_gp *lu_gp; |
1592 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1593 | ||
c66ac9db | 1594 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1595 | if (!lu_gp_mem) |
c66ac9db NB |
1596 | return; |
1597 | ||
1598 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1599 | cpu_relax(); | |
1600 | ||
1601 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1602 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1603 | if (lu_gp) { |
c66ac9db NB |
1604 | spin_lock(&lu_gp->lu_gp_lock); |
1605 | if (lu_gp_mem->lu_gp_assoc) { | |
1606 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1607 | lu_gp->lu_gp_members--; | |
1608 | lu_gp_mem->lu_gp_assoc = 0; | |
1609 | } | |
1610 | spin_unlock(&lu_gp->lu_gp_lock); | |
1611 | lu_gp_mem->lu_gp = NULL; | |
1612 | } | |
1613 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1614 | ||
1615 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1616 | } | |
1617 | ||
1618 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1619 | { | |
1620 | struct t10_alua_lu_gp *lu_gp; | |
1621 | struct config_item *ci; | |
1622 | ||
e3d6f909 AG |
1623 | spin_lock(&lu_gps_lock); |
1624 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1625 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1626 | continue; |
1627 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1628 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1629 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1630 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1631 | return lu_gp; |
1632 | } | |
1633 | } | |
e3d6f909 | 1634 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1635 | |
1636 | return NULL; | |
1637 | } | |
1638 | ||
1639 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1640 | { | |
e3d6f909 | 1641 | spin_lock(&lu_gps_lock); |
c66ac9db | 1642 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1643 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1644 | } |
1645 | ||
1646 | /* | |
1647 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1648 | */ | |
1649 | void __core_alua_attach_lu_gp_mem( | |
1650 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1651 | struct t10_alua_lu_gp *lu_gp) | |
1652 | { | |
1653 | spin_lock(&lu_gp->lu_gp_lock); | |
1654 | lu_gp_mem->lu_gp = lu_gp; | |
1655 | lu_gp_mem->lu_gp_assoc = 1; | |
1656 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1657 | lu_gp->lu_gp_members++; | |
1658 | spin_unlock(&lu_gp->lu_gp_lock); | |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1663 | */ | |
1664 | void __core_alua_drop_lu_gp_mem( | |
1665 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1666 | struct t10_alua_lu_gp *lu_gp) | |
1667 | { | |
1668 | spin_lock(&lu_gp->lu_gp_lock); | |
1669 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1670 | lu_gp_mem->lu_gp = NULL; | |
1671 | lu_gp_mem->lu_gp_assoc = 0; | |
1672 | lu_gp->lu_gp_members--; | |
1673 | spin_unlock(&lu_gp->lu_gp_lock); | |
1674 | } | |
1675 | ||
0fd97ccf CH |
1676 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1677 | const char *name, int def_group) | |
c66ac9db NB |
1678 | { |
1679 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1680 | ||
1681 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1682 | if (!tg_pt_gp) { |
1683 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1684 | return NULL; |
1685 | } | |
1686 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1687 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
c66ac9db NB |
1688 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); |
1689 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1690 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
d7175373 MC |
1691 | INIT_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1692 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1693 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1694 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1695 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1696 | /* |
125d0119 | 1697 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1698 | */ |
1699 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1700 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1701 | /* |
1702 | * Set the default Active/NonOptimized Delay in milliseconds | |
1703 | */ | |
1704 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1705 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1706 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1707 | |
c0dc941e HR |
1708 | /* |
1709 | * Enable all supported states | |
1710 | */ | |
1711 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1712 | ALUA_T_SUP | ALUA_O_SUP | | |
1713 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1714 | ||
c66ac9db | 1715 | if (def_group) { |
0fd97ccf | 1716 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1717 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1718 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1719 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1720 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1721 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1722 | &dev->t10_alua.tg_pt_gps_list); |
1723 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1724 | } |
1725 | ||
1726 | return tg_pt_gp; | |
1727 | } | |
1728 | ||
1729 | int core_alua_set_tg_pt_gp_id( | |
1730 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1731 | u16 tg_pt_gp_id) | |
1732 | { | |
0fd97ccf | 1733 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1734 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1735 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1736 | |
c66ac9db NB |
1737 | /* |
1738 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1739 | */ | |
1740 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1741 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1742 | " ignoring request\n"); |
e3d6f909 | 1743 | return -EINVAL; |
c66ac9db NB |
1744 | } |
1745 | ||
0fd97ccf CH |
1746 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1747 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1748 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1749 | " 0x0000ffff reached\n"); |
0fd97ccf | 1750 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1751 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1752 | return -ENOSPC; |
c66ac9db NB |
1753 | } |
1754 | again: | |
1755 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1756 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1757 | |
0fd97ccf | 1758 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1759 | tg_pt_gp_list) { |
1760 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1761 | if (!tg_pt_gp_id) |
c66ac9db NB |
1762 | goto again; |
1763 | ||
6708bb27 | 1764 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1765 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1766 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1767 | return -EINVAL; |
c66ac9db NB |
1768 | } |
1769 | } | |
1770 | ||
1771 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1772 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1773 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1774 | &dev->t10_alua.tg_pt_gps_list); |
1775 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1776 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1777 | |
1778 | return 0; | |
1779 | } | |
1780 | ||
c66ac9db NB |
1781 | void core_alua_free_tg_pt_gp( |
1782 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1783 | { | |
0fd97ccf | 1784 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1785 | struct se_lun *lun, *next; |
0fd97ccf | 1786 | |
c66ac9db NB |
1787 | /* |
1788 | * Once we have reached this point, config_item_put() has already | |
1789 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1790 | * | |
1791 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1792 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1793 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1794 | */ | |
0fd97ccf | 1795 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1796 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1797 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1798 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1799 | ||
d7175373 | 1800 | flush_work(&tg_pt_gp->tg_pt_gp_transition_work); |
9c6e164c | 1801 | |
c66ac9db NB |
1802 | /* |
1803 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1804 | * core_alua_get_tg_pt_gp_by_name() in | |
1805 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1806 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1807 | */ | |
1808 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1809 | cpu_relax(); | |
0fd97ccf | 1810 | |
c66ac9db NB |
1811 | /* |
1812 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1813 | * struct se_port. | |
1814 | */ | |
1815 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1816 | list_for_each_entry_safe(lun, next, |
1817 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1818 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1819 | tg_pt_gp->tg_pt_gp_members--; | |
1820 | ||
c66ac9db NB |
1821 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1822 | /* | |
c66ac9db | 1823 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1824 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1825 | * default_tg_pt_gp. |
1826 | */ | |
adf653f9 | 1827 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1828 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1829 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1830 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1831 | } else |
adf653f9 CH |
1832 | lun->lun_tg_pt_gp = NULL; |
1833 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1834 | |
1835 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1836 | } | |
1837 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1838 | ||
1839 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1840 | } | |
1841 | ||
c66ac9db | 1842 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1843 | struct se_device *dev, const char *name) |
c66ac9db NB |
1844 | { |
1845 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1846 | struct config_item *ci; | |
1847 | ||
0fd97ccf CH |
1848 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1849 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1850 | tg_pt_gp_list) { |
6708bb27 | 1851 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1852 | continue; |
1853 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1854 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1855 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1856 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1857 | return tg_pt_gp; |
1858 | } | |
1859 | } | |
0fd97ccf | 1860 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1861 | |
1862 | return NULL; | |
1863 | } | |
1864 | ||
1865 | static void core_alua_put_tg_pt_gp_from_name( | |
1866 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1867 | { | |
0fd97ccf | 1868 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1869 | |
0fd97ccf | 1870 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1871 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1872 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1873 | } |
1874 | ||
adf653f9 CH |
1875 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1876 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1877 | { |
3dd348fc HR |
1878 | struct se_dev_entry *se_deve; |
1879 | ||
adf653f9 CH |
1880 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1881 | ||
c66ac9db | 1882 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1883 | lun->lun_tg_pt_gp = tg_pt_gp; |
1884 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db | 1885 | tg_pt_gp->tg_pt_gp_members++; |
3dd348fc HR |
1886 | spin_lock(&lun->lun_deve_lock); |
1887 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) | |
1888 | core_scsi3_ua_allocate(se_deve, 0x3f, | |
1889 | ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); | |
1890 | spin_unlock(&lun->lun_deve_lock); | |
c66ac9db NB |
1891 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1892 | } | |
1893 | ||
adf653f9 CH |
1894 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1895 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1896 | { |
adf653f9 CH |
1897 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1898 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1899 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1900 | } | |
1901 | ||
1902 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1903 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1904 | { |
adf653f9 CH |
1905 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1906 | ||
c66ac9db | 1907 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1908 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1909 | tg_pt_gp->tg_pt_gp_members--; |
1910 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1911 | |
1912 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1913 | } |
1914 | ||
adf653f9 CH |
1915 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1916 | { | |
1917 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1918 | ||
1919 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1920 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1921 | if (tg_pt_gp) | |
1922 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1923 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1924 | } | |
1925 | ||
1926 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1927 | { |
c66ac9db | 1928 | struct config_item *tg_pt_ci; |
c66ac9db | 1929 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1930 | ssize_t len = 0; |
1931 | ||
adf653f9 CH |
1932 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1933 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1934 | if (tg_pt_gp) { |
c66ac9db NB |
1935 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1936 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1937 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1938 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1939 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1940 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
1941 | core_alua_dump_state(atomic_read( | |
1942 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
1943 | core_alua_dump_status( | |
1944 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1945 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1946 | "Offline" : "None", |
adf653f9 | 1947 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1948 | } |
adf653f9 | 1949 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1950 | |
1951 | return len; | |
1952 | } | |
1953 | ||
1954 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1955 | struct se_lun *lun, |
c66ac9db NB |
1956 | const char *page, |
1957 | size_t count) | |
1958 | { | |
adf653f9 | 1959 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1960 | /* |
1961 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1962 | * reference to se_device->dev_group. | |
1963 | */ | |
1964 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1965 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1966 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1967 | int move = 0; | |
1968 | ||
530c6891 | 1969 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA || |
adf653f9 CH |
1970 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
1971 | return -ENODEV; | |
c66ac9db NB |
1972 | |
1973 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1974 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1975 | return -EINVAL; |
1976 | } | |
1977 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1978 | memcpy(buf, page, count); | |
1979 | /* | |
1980 | * Any ALUA target port group alias besides "NULL" means we will be | |
1981 | * making a new group association. | |
1982 | */ | |
1983 | if (strcmp(strstrip(buf), "NULL")) { | |
1984 | /* | |
1985 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1986 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1987 | * core_alua_put_tg_pt_gp_from_name() below. | |
1988 | */ | |
0fd97ccf | 1989 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1990 | strstrip(buf)); |
6708bb27 | 1991 | if (!tg_pt_gp_new) |
c66ac9db NB |
1992 | return -ENODEV; |
1993 | } | |
c66ac9db | 1994 | |
adf653f9 CH |
1995 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1996 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1997 | if (tg_pt_gp) { |
c66ac9db NB |
1998 | /* |
1999 | * Clearing an existing tg_pt_gp association, and replacing | |
2000 | * with the default_tg_pt_gp. | |
2001 | */ | |
6708bb27 AG |
2002 | if (!tg_pt_gp_new) { |
2003 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
2004 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
2005 | " alua/%s, ID: %hu back to" | |
2006 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
2007 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2008 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2009 | config_item_name(&lun->lun_group.cg_item), |
2010 | config_item_name( | |
2011 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
2012 | tg_pt_gp->tg_pt_gp_id); | |
2013 | ||
adf653f9 CH |
2014 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
2015 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 2016 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 2017 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
2018 | |
2019 | return count; | |
2020 | } | |
adf653f9 | 2021 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
2022 | move = 1; |
2023 | } | |
adf653f9 CH |
2024 | |
2025 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
2026 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 2027 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2028 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2029 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2030 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2031 | config_item_name(&lun->lun_group.cg_item), |
2032 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2033 | tg_pt_gp_new->tg_pt_gp_id); | |
2034 | ||
2035 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2036 | return count; | |
2037 | } | |
2038 | ||
2039 | ssize_t core_alua_show_access_type( | |
2040 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2041 | char *page) | |
2042 | { | |
125d0119 HR |
2043 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2044 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2045 | return sprintf(page, "Implicit and Explicit\n"); | |
2046 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2047 | return sprintf(page, "Implicit\n"); | |
2048 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2049 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2050 | else |
2051 | return sprintf(page, "None\n"); | |
2052 | } | |
2053 | ||
2054 | ssize_t core_alua_store_access_type( | |
2055 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2056 | const char *page, | |
2057 | size_t count) | |
2058 | { | |
2059 | unsigned long tmp; | |
2060 | int ret; | |
2061 | ||
57103d7f | 2062 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2063 | if (ret < 0) { |
6708bb27 | 2064 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2065 | return ret; |
c66ac9db NB |
2066 | } |
2067 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2068 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2069 | " %lu\n", tmp); |
2070 | return -EINVAL; | |
2071 | } | |
2072 | if (tmp == 3) | |
2073 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2074 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2075 | else if (tmp == 2) |
125d0119 | 2076 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2077 | else if (tmp == 1) |
125d0119 | 2078 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2079 | else |
2080 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2081 | ||
2082 | return count; | |
2083 | } | |
2084 | ||
2085 | ssize_t core_alua_show_nonop_delay_msecs( | |
2086 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2087 | char *page) | |
2088 | { | |
2089 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2090 | } | |
2091 | ||
2092 | ssize_t core_alua_store_nonop_delay_msecs( | |
2093 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2094 | const char *page, | |
2095 | size_t count) | |
2096 | { | |
2097 | unsigned long tmp; | |
2098 | int ret; | |
2099 | ||
57103d7f | 2100 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2101 | if (ret < 0) { |
6708bb27 | 2102 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2103 | return ret; |
c66ac9db NB |
2104 | } |
2105 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2106 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2107 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2108 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2109 | return -EINVAL; | |
2110 | } | |
2111 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2112 | ||
2113 | return count; | |
2114 | } | |
2115 | ||
2116 | ssize_t core_alua_show_trans_delay_msecs( | |
2117 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2118 | char *page) | |
2119 | { | |
2120 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2121 | } | |
2122 | ||
2123 | ssize_t core_alua_store_trans_delay_msecs( | |
2124 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2125 | const char *page, | |
2126 | size_t count) | |
2127 | { | |
2128 | unsigned long tmp; | |
2129 | int ret; | |
2130 | ||
57103d7f | 2131 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2132 | if (ret < 0) { |
6708bb27 | 2133 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2134 | return ret; |
c66ac9db NB |
2135 | } |
2136 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2137 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2138 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2139 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2140 | return -EINVAL; | |
2141 | } | |
2142 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2143 | ||
2144 | return count; | |
2145 | } | |
2146 | ||
125d0119 | 2147 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2148 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2149 | char *page) | |
2150 | { | |
125d0119 | 2151 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2152 | } |
2153 | ||
125d0119 | 2154 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2155 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2156 | const char *page, | |
2157 | size_t count) | |
2158 | { | |
2159 | unsigned long tmp; | |
2160 | int ret; | |
2161 | ||
57103d7f | 2162 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2163 | if (ret < 0) { |
125d0119 | 2164 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2165 | return ret; |
5b9a4d72 | 2166 | } |
125d0119 HR |
2167 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2168 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2169 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2170 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2171 | return -EINVAL; |
2172 | } | |
125d0119 | 2173 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2174 | |
2175 | return count; | |
2176 | } | |
2177 | ||
c66ac9db NB |
2178 | ssize_t core_alua_show_preferred_bit( |
2179 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2180 | char *page) | |
2181 | { | |
2182 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2183 | } | |
2184 | ||
2185 | ssize_t core_alua_store_preferred_bit( | |
2186 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2187 | const char *page, | |
2188 | size_t count) | |
2189 | { | |
2190 | unsigned long tmp; | |
2191 | int ret; | |
2192 | ||
57103d7f | 2193 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2194 | if (ret < 0) { |
6708bb27 | 2195 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2196 | return ret; |
c66ac9db NB |
2197 | } |
2198 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2199 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2200 | return -EINVAL; |
2201 | } | |
2202 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2203 | ||
2204 | return count; | |
2205 | } | |
2206 | ||
2207 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2208 | { | |
c66ac9db | 2209 | return sprintf(page, "%d\n", |
adf653f9 | 2210 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2211 | } |
2212 | ||
2213 | ssize_t core_alua_store_offline_bit( | |
2214 | struct se_lun *lun, | |
2215 | const char *page, | |
2216 | size_t count) | |
2217 | { | |
4cc987ea NB |
2218 | /* |
2219 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2220 | * reference to se_device->dev_group. | |
2221 | */ | |
2222 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2223 | unsigned long tmp; |
2224 | int ret; | |
2225 | ||
530c6891 | 2226 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA || |
adf653f9 | 2227 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
c66ac9db NB |
2228 | return -ENODEV; |
2229 | ||
57103d7f | 2230 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2231 | if (ret < 0) { |
6708bb27 | 2232 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2233 | return ret; |
c66ac9db NB |
2234 | } |
2235 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2236 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2237 | tmp); |
2238 | return -EINVAL; | |
2239 | } | |
c66ac9db | 2240 | |
adf653f9 | 2241 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2242 | if (ret < 0) |
2243 | return -EINVAL; | |
2244 | ||
2245 | return count; | |
2246 | } | |
2247 | ||
2248 | ssize_t core_alua_show_secondary_status( | |
2249 | struct se_lun *lun, | |
2250 | char *page) | |
2251 | { | |
adf653f9 | 2252 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2253 | } |
2254 | ||
2255 | ssize_t core_alua_store_secondary_status( | |
2256 | struct se_lun *lun, | |
2257 | const char *page, | |
2258 | size_t count) | |
2259 | { | |
2260 | unsigned long tmp; | |
2261 | int ret; | |
2262 | ||
57103d7f | 2263 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2264 | if (ret < 0) { |
6708bb27 | 2265 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2266 | return ret; |
c66ac9db NB |
2267 | } |
2268 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2269 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2270 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2271 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2272 | tmp); |
2273 | return -EINVAL; | |
2274 | } | |
adf653f9 | 2275 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2276 | |
2277 | return count; | |
2278 | } | |
2279 | ||
2280 | ssize_t core_alua_show_secondary_write_metadata( | |
2281 | struct se_lun *lun, | |
2282 | char *page) | |
2283 | { | |
adf653f9 | 2284 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2285 | } |
2286 | ||
2287 | ssize_t core_alua_store_secondary_write_metadata( | |
2288 | struct se_lun *lun, | |
2289 | const char *page, | |
2290 | size_t count) | |
2291 | { | |
2292 | unsigned long tmp; | |
2293 | int ret; | |
2294 | ||
57103d7f | 2295 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2296 | if (ret < 0) { |
6708bb27 | 2297 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2298 | return ret; |
c66ac9db NB |
2299 | } |
2300 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2301 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2302 | " %lu\n", tmp); |
2303 | return -EINVAL; | |
2304 | } | |
adf653f9 | 2305 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2306 | |
2307 | return count; | |
2308 | } | |
2309 | ||
0fd97ccf | 2310 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2311 | { |
530c6891 MC |
2312 | if (!(dev->transport->transport_flags & |
2313 | TRANSPORT_FLAG_PASSTHROUGH_ALUA) && | |
c87fbd56 CH |
2314 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2315 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2316 | |
c66ac9db | 2317 | /* |
25985edc | 2318 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2319 | * LUN Group. |
2320 | */ | |
2321 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2322 | if (IS_ERR(lu_gp_mem)) |
2323 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2324 | |
c66ac9db NB |
2325 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2326 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2327 | default_lu_gp); |
c66ac9db NB |
2328 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2329 | ||
6708bb27 | 2330 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2331 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2332 | dev->transport->name); |
c66ac9db NB |
2333 | } |
2334 | ||
2335 | return 0; | |
2336 | } |