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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c66ac9db NB |
2 | /******************************************************************************* |
3 | * Filename: target_core_alua.c | |
4 | * | |
5 | * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA) | |
6 | * | |
4c76251e | 7 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
8 | * |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
c66ac9db NB |
11 | ******************************************************************************/ |
12 | ||
c66ac9db NB |
13 | #include <linux/slab.h> |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/configfs.h> | |
8dcf07be | 16 | #include <linux/delay.h> |
c53181af | 17 | #include <linux/export.h> |
8dcf07be | 18 | #include <linux/fcntl.h> |
0e9b10a9 | 19 | #include <linux/file.h> |
8dcf07be | 20 | #include <linux/fs.h> |
ba929992 | 21 | #include <scsi/scsi_proto.h> |
33395fb8 | 22 | #include <asm/unaligned.h> |
c66ac9db NB |
23 | |
24 | #include <target/target_core_base.h> | |
c4795fb2 CH |
25 | #include <target/target_core_backend.h> |
26 | #include <target/target_core_fabric.h> | |
c66ac9db | 27 | |
e26d99ae | 28 | #include "target_core_internal.h" |
c66ac9db | 29 | #include "target_core_alua.h" |
c66ac9db NB |
30 | #include "target_core_ua.h" |
31 | ||
bb91c1a0 | 32 | static sense_reason_t core_alua_check_transition(int state, int valid, |
1ca4d4fa | 33 | int *primary, int explicit); |
c66ac9db | 34 | static int core_alua_set_tg_pt_secondary_state( |
adf653f9 | 35 | struct se_lun *lun, int explicit, int offline); |
c66ac9db | 36 | |
bb91c1a0 HR |
37 | static char *core_alua_dump_state(int state); |
38 | ||
adf653f9 CH |
39 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
40 | struct t10_alua_tg_pt_gp *tg_pt_gp); | |
41 | ||
e3d6f909 AG |
42 | static u16 alua_lu_gps_counter; |
43 | static u32 alua_lu_gps_count; | |
44 | ||
45 | static DEFINE_SPINLOCK(lu_gps_lock); | |
46 | static LIST_HEAD(lu_gps_list); | |
47 | ||
48 | struct t10_alua_lu_gp *default_lu_gp; | |
49 | ||
c66094bf HR |
50 | /* |
51 | * REPORT REFERRALS | |
52 | * | |
53 | * See sbc3r35 section 5.23 | |
54 | */ | |
55 | sense_reason_t | |
56 | target_emulate_report_referrals(struct se_cmd *cmd) | |
57 | { | |
58 | struct se_device *dev = cmd->se_dev; | |
59 | struct t10_alua_lba_map *map; | |
60 | struct t10_alua_lba_map_member *map_mem; | |
61 | unsigned char *buf; | |
62 | u32 rd_len = 0, off; | |
63 | ||
64 | if (cmd->data_length < 4) { | |
65 | pr_warn("REPORT REFERRALS allocation length %u too" | |
66 | " small\n", cmd->data_length); | |
67 | return TCM_INVALID_CDB_FIELD; | |
68 | } | |
69 | ||
70 | buf = transport_kmap_data_sg(cmd); | |
71 | if (!buf) | |
72 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
73 | ||
74 | off = 4; | |
75 | spin_lock(&dev->t10_alua.lba_map_lock); | |
76 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
77 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
78 | transport_kunmap_data_sg(cmd); | |
79 | ||
80 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
81 | } | |
82 | ||
83 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
84 | lba_map_list) { | |
85 | int desc_num = off + 3; | |
86 | int pg_num; | |
87 | ||
88 | off += 4; | |
38edd724 HR |
89 | if (cmd->data_length > off) |
90 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 91 | off += 8; |
38edd724 HR |
92 | if (cmd->data_length > off) |
93 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
94 | off += 8; |
95 | rd_len += 20; | |
96 | pg_num = 0; | |
97 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
98 | lba_map_mem_list) { | |
38edd724 HR |
99 | int alua_state = map_mem->lba_map_mem_alua_state; |
100 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
101 | ||
102 | if (cmd->data_length > off) | |
103 | buf[off] = alua_state & 0x0f; | |
104 | off += 2; | |
105 | if (cmd->data_length > off) | |
106 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
107 | off++; | |
108 | if (cmd->data_length > off) | |
109 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 110 | off++; |
c66094bf HR |
111 | rd_len += 4; |
112 | pg_num++; | |
113 | } | |
38edd724 HR |
114 | if (cmd->data_length > desc_num) |
115 | buf[desc_num] = pg_num; | |
c66094bf HR |
116 | } |
117 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
118 | ||
119 | /* | |
120 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
121 | */ | |
122 | put_unaligned_be16(rd_len, &buf[2]); | |
123 | ||
124 | transport_kunmap_data_sg(cmd); | |
125 | ||
126 | target_complete_cmd(cmd, GOOD); | |
127 | return 0; | |
128 | } | |
129 | ||
c66ac9db NB |
130 | /* |
131 | * REPORT_TARGET_PORT_GROUPS | |
132 | * | |
133 | * See spc4r17 section 6.27 | |
134 | */ | |
de103c93 CH |
135 | sense_reason_t |
136 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 137 | { |
0fd97ccf | 138 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 139 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
adf653f9 | 140 | struct se_lun *lun; |
05d1c7c0 | 141 | unsigned char *buf; |
5b9a4d72 NB |
142 | u32 rd_len = 0, off; |
143 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 144 | |
6b20fa9a | 145 | /* |
5b9a4d72 NB |
146 | * Skip over RESERVED area to first Target port group descriptor |
147 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 148 | */ |
5b9a4d72 NB |
149 | if (ext_hdr != 0) |
150 | off = 8; | |
151 | else | |
152 | off = 4; | |
153 | ||
154 | if (cmd->data_length < off) { | |
155 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
156 | " small for %s header\n", cmd->data_length, | |
157 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 158 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 159 | } |
4949314c | 160 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
161 | if (!buf) |
162 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 163 | |
0fd97ccf CH |
164 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
165 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 166 | tg_pt_gp_list) { |
6b20fa9a NB |
167 | /* |
168 | * Check if the Target port group and Target port descriptor list | |
169 | * based on tg_pt_gp_members count will fit into the response payload. | |
170 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
171 | * the allocation length and the response is truncated. | |
172 | */ | |
173 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
174 | cmd->data_length) { | |
175 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
176 | continue; | |
177 | } | |
c66ac9db NB |
178 | /* |
179 | * PREF: Preferred target port bit, determine if this | |
180 | * bit should be set for port group. | |
181 | */ | |
182 | if (tg_pt_gp->tg_pt_gp_pref) | |
183 | buf[off] = 0x80; | |
184 | /* | |
185 | * Set the ASYMMETRIC ACCESS State | |
186 | */ | |
d19c4643 | 187 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_access_state & 0xff; |
c66ac9db NB |
188 | /* |
189 | * Set supported ASYMMETRIC ACCESS State bits | |
190 | */ | |
c0dc941e | 191 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
192 | /* |
193 | * TARGET PORT GROUP | |
194 | */ | |
a85d667e BVA |
195 | put_unaligned_be16(tg_pt_gp->tg_pt_gp_id, &buf[off]); |
196 | off += 2; | |
c66ac9db NB |
197 | |
198 | off++; /* Skip over Reserved */ | |
199 | /* | |
200 | * STATUS CODE | |
201 | */ | |
202 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
203 | /* | |
204 | * Vendor Specific field | |
205 | */ | |
206 | buf[off++] = 0x00; | |
207 | /* | |
208 | * TARGET PORT COUNT | |
209 | */ | |
210 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
211 | rd_len += 8; | |
212 | ||
213 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
214 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
215 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
216 | /* |
217 | * Start Target Port descriptor format | |
218 | * | |
219 | * See spc4r17 section 6.2.7 Table 247 | |
220 | */ | |
221 | off += 2; /* Skip over Obsolete */ | |
222 | /* | |
223 | * Set RELATIVE TARGET PORT IDENTIFIER | |
224 | */ | |
a85d667e BVA |
225 | put_unaligned_be16(lun->lun_rtpi, &buf[off]); |
226 | off += 2; | |
c66ac9db NB |
227 | rd_len += 4; |
228 | } | |
229 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
230 | } | |
0fd97ccf | 231 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
232 | /* |
233 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
234 | */ | |
5b9a4d72 | 235 | put_unaligned_be32(rd_len, &buf[0]); |
c66ac9db | 236 | |
5b9a4d72 NB |
237 | /* |
238 | * Fill in the Extended header parameter data format if requested | |
239 | */ | |
240 | if (ext_hdr != 0) { | |
241 | buf[4] = 0x10; | |
242 | /* | |
125d0119 | 243 | * Set the implicit transition time (in seconds) for the application |
5b9a4d72 NB |
244 | * client to use as a base for it's transition timeout value. |
245 | * | |
246 | * Use the current tg_pt_gp_mem -> tg_pt_gp membership from the LUN | |
247 | * this CDB was received upon to determine this value individually | |
248 | * for ALUA target port group. | |
249 | */ | |
adf653f9 CH |
250 | spin_lock(&cmd->se_lun->lun_tg_pt_gp_lock); |
251 | tg_pt_gp = cmd->se_lun->lun_tg_pt_gp; | |
252 | if (tg_pt_gp) | |
253 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; | |
254 | spin_unlock(&cmd->se_lun->lun_tg_pt_gp_lock); | |
5b9a4d72 | 255 | } |
4949314c | 256 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 257 | |
7081fb62 | 258 | target_complete_cmd_with_length(cmd, GOOD, rd_len + 4); |
c66ac9db NB |
259 | return 0; |
260 | } | |
261 | ||
262 | /* | |
125d0119 | 263 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
264 | * |
265 | * See spc4r17 section 6.35 | |
266 | */ | |
de103c93 CH |
267 | sense_reason_t |
268 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 269 | { |
5951146d | 270 | struct se_device *dev = cmd->se_dev; |
adf653f9 | 271 | struct se_lun *l_lun = cmd->se_lun; |
e3d6f909 | 272 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; |
c66ac9db | 273 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
05d1c7c0 AG |
274 | unsigned char *buf; |
275 | unsigned char *ptr; | |
a0d50f62 | 276 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 277 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 278 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
279 | u16 tg_pt_id, rtpi; |
280 | ||
0d7f1299 PB |
281 | if (cmd->data_length < 4) { |
282 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
283 | " small\n", cmd->data_length); | |
de103c93 | 284 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
285 | } |
286 | ||
4949314c | 287 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
288 | if (!buf) |
289 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 290 | |
c66ac9db | 291 | /* |
125d0119 | 292 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
293 | * for the local tg_pt_gp. |
294 | */ | |
adf653f9 CH |
295 | spin_lock(&l_lun->lun_tg_pt_gp_lock); |
296 | l_tg_pt_gp = l_lun->lun_tg_pt_gp; | |
6708bb27 | 297 | if (!l_tg_pt_gp) { |
adf653f9 CH |
298 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
299 | pr_err("Unable to access l_lun->tg_pt_gp\n"); | |
de103c93 | 300 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 301 | goto out; |
c66ac9db | 302 | } |
c66ac9db | 303 | |
125d0119 | 304 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
adf653f9 | 305 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
6708bb27 | 306 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 307 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 308 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 309 | goto out; |
c66ac9db | 310 | } |
bb91c1a0 | 311 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
adf653f9 | 312 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
c66ac9db | 313 | |
05d1c7c0 AG |
314 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
315 | ||
c66ac9db | 316 | while (len < cmd->data_length) { |
de103c93 | 317 | bool found = false; |
c66ac9db NB |
318 | alua_access_state = (ptr[0] & 0x0f); |
319 | /* | |
320 | * Check the received ALUA access state, and determine if | |
321 | * the state is a primary or secondary target port asymmetric | |
322 | * access state. | |
323 | */ | |
1ca4d4fa MC |
324 | rc = core_alua_check_transition(alua_access_state, valid_states, |
325 | &primary, 1); | |
de103c93 | 326 | if (rc) { |
c66ac9db NB |
327 | /* |
328 | * If the SET TARGET PORT GROUPS attempts to establish | |
329 | * an invalid combination of target port asymmetric | |
330 | * access states or attempts to establish an | |
331 | * unsupported target port asymmetric access state, | |
332 | * then the command shall be terminated with CHECK | |
333 | * CONDITION status, with the sense key set to ILLEGAL | |
334 | * REQUEST, and the additional sense code set to INVALID | |
335 | * FIELD IN PARAMETER LIST. | |
336 | */ | |
05d1c7c0 | 337 | goto out; |
c66ac9db | 338 | } |
de103c93 | 339 | |
c66ac9db NB |
340 | /* |
341 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
342 | * specifies a primary target port asymmetric access state, | |
343 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
344 | * a primary target port group for which the primary target | |
345 | * port asymmetric access state shall be changed. If the | |
346 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
347 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
348 | * TARGET PORT field specifies the relative target port | |
349 | * identifier (see 3.1.120) of the target port for which the | |
350 | * secondary target port asymmetric access state shall be | |
351 | * changed. | |
352 | */ | |
353 | if (primary) { | |
33395fb8 | 354 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
355 | /* |
356 | * Locate the matching target port group ID from | |
357 | * the global tg_pt_gp list | |
358 | */ | |
0fd97ccf | 359 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 360 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 361 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 362 | tg_pt_gp_list) { |
6708bb27 | 363 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
364 | continue; |
365 | ||
366 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
367 | continue; | |
368 | ||
33940d09 | 369 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
de103c93 | 370 | |
0fd97ccf | 371 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 372 | |
de103c93 | 373 | if (!core_alua_do_port_transition(tg_pt_gp, |
adf653f9 | 374 | dev, l_lun, nacl, |
de103c93 CH |
375 | alua_access_state, 1)) |
376 | found = true; | |
c66ac9db | 377 | |
0fd97ccf | 378 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 379 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
c66ac9db NB |
380 | break; |
381 | } | |
0fd97ccf | 382 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 383 | } else { |
adf653f9 CH |
384 | struct se_lun *lun; |
385 | ||
c66ac9db | 386 | /* |
f1ae05d5 | 387 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
388 | * the Target Port in question for the the incoming |
389 | * SET_TARGET_PORT_GROUPS op. | |
390 | */ | |
33395fb8 | 391 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 392 | /* |
35d1efe8 | 393 | * Locate the matching relative target port identifier |
c66ac9db NB |
394 | * for the struct se_device storage object. |
395 | */ | |
396 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
397 | list_for_each_entry(lun, &dev->dev_sep_list, |
398 | lun_dev_link) { | |
399 | if (lun->lun_rtpi != rtpi) | |
c66ac9db NB |
400 | continue; |
401 | ||
adf653f9 | 402 | // XXX: racy unlock |
c66ac9db NB |
403 | spin_unlock(&dev->se_port_lock); |
404 | ||
de103c93 | 405 | if (!core_alua_set_tg_pt_secondary_state( |
adf653f9 | 406 | lun, 1, 1)) |
de103c93 | 407 | found = true; |
c66ac9db NB |
408 | |
409 | spin_lock(&dev->se_port_lock); | |
410 | break; | |
411 | } | |
412 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
413 | } |
414 | ||
415 | if (!found) { | |
416 | rc = TCM_INVALID_PARAMETER_LIST; | |
417 | goto out; | |
c66ac9db NB |
418 | } |
419 | ||
420 | ptr += 4; | |
421 | len += 4; | |
422 | } | |
423 | ||
05d1c7c0 | 424 | out: |
4949314c | 425 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
426 | if (!rc) |
427 | target_complete_cmd(cmd, GOOD); | |
428 | return rc; | |
c66ac9db NB |
429 | } |
430 | ||
1e3ab99d PB |
431 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
432 | { | |
433 | /* | |
434 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
435 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
436 | * by the ALUA primary or secondary access state.. | |
437 | */ | |
438 | pr_debug("[%s]: ALUA TG Port not available, " | |
439 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
440 | "0x04/0x%02x\n", | |
30c7ca93 | 441 | cmd->se_tfo->fabric_name, alua_ascq); |
1e3ab99d PB |
442 | |
443 | cmd->scsi_asc = 0x04; | |
444 | cmd->scsi_ascq = alua_ascq; | |
445 | } | |
446 | ||
447 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
448 | struct se_cmd *cmd, |
449 | unsigned char *cdb, | |
1e3ab99d | 450 | int nonop_delay_msecs) |
c66ac9db NB |
451 | { |
452 | /* | |
453 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
454 | * later to determine if processing of this cmd needs to be | |
455 | * temporarily delayed for the Active/NonOptimized primary access state. | |
456 | */ | |
457 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
458 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
459 | } |
460 | ||
c66094bf HR |
461 | static inline int core_alua_state_lba_dependent( |
462 | struct se_cmd *cmd, | |
1e3ab99d | 463 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
464 | { |
465 | struct se_device *dev = cmd->se_dev; | |
466 | u64 segment_size, segment_mult, sectors, lba; | |
467 | ||
468 | /* Only need to check for cdb actually containing LBAs */ | |
469 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
470 | return 0; | |
471 | ||
472 | spin_lock(&dev->t10_alua.lba_map_lock); | |
473 | segment_size = dev->t10_alua.lba_map_segment_size; | |
474 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
475 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
476 | ||
477 | lba = cmd->t_task_lba; | |
478 | while (lba < cmd->t_task_lba + sectors) { | |
479 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
480 | struct t10_alua_lba_map_member *map_mem; | |
481 | ||
482 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
483 | lba_map_list) { | |
484 | u64 start_lba, last_lba; | |
485 | u64 first_lba = map->lba_map_first_lba; | |
486 | ||
487 | if (segment_mult) { | |
488 | u64 tmp = lba; | |
cdf55949 | 489 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
490 | |
491 | last_lba = first_lba + segment_size - 1; | |
492 | if (start_lba >= first_lba && | |
493 | start_lba <= last_lba) { | |
494 | lba += segment_size; | |
495 | cur_map = map; | |
496 | break; | |
497 | } | |
498 | } else { | |
499 | last_lba = map->lba_map_last_lba; | |
500 | if (lba >= first_lba && lba <= last_lba) { | |
501 | lba = last_lba + 1; | |
502 | cur_map = map; | |
503 | break; | |
504 | } | |
505 | } | |
506 | } | |
507 | if (!cur_map) { | |
508 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 509 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
510 | return 1; |
511 | } | |
512 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
513 | lba_map_mem_list) { | |
514 | if (map_mem->lba_map_mem_alua_pg_id != | |
515 | tg_pt_gp->tg_pt_gp_id) | |
516 | continue; | |
517 | switch(map_mem->lba_map_mem_alua_state) { | |
518 | case ALUA_ACCESS_STATE_STANDBY: | |
519 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 520 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
521 | return 1; |
522 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
523 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 524 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
525 | return 1; |
526 | default: | |
527 | break; | |
528 | } | |
529 | } | |
530 | } | |
531 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
532 | return 0; | |
533 | } | |
534 | ||
c66ac9db NB |
535 | static inline int core_alua_state_standby( |
536 | struct se_cmd *cmd, | |
1e3ab99d | 537 | unsigned char *cdb) |
c66ac9db NB |
538 | { |
539 | /* | |
540 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
541 | * spc4r17 section 5.9.2.4.4 | |
542 | */ | |
543 | switch (cdb[0]) { | |
544 | case INQUIRY: | |
545 | case LOG_SELECT: | |
546 | case LOG_SENSE: | |
547 | case MODE_SELECT: | |
548 | case MODE_SENSE: | |
549 | case REPORT_LUNS: | |
550 | case RECEIVE_DIAGNOSTIC: | |
551 | case SEND_DIAGNOSTIC: | |
e7810c2d | 552 | case READ_CAPACITY: |
30f359a6 | 553 | return 0; |
eb846d9f | 554 | case SERVICE_ACTION_IN_16: |
e7810c2d NB |
555 | switch (cdb[1] & 0x1f) { |
556 | case SAI_READ_CAPACITY_16: | |
557 | return 0; | |
558 | default: | |
559 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); | |
560 | return 1; | |
561 | } | |
c66ac9db | 562 | case MAINTENANCE_IN: |
ba539743 | 563 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
564 | case MI_REPORT_TARGET_PGS: |
565 | return 0; | |
566 | default: | |
1e3ab99d | 567 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
568 | return 1; |
569 | } | |
570 | case MAINTENANCE_OUT: | |
571 | switch (cdb[1]) { | |
572 | case MO_SET_TARGET_PGS: | |
573 | return 0; | |
574 | default: | |
1e3ab99d | 575 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
576 | return 1; |
577 | } | |
578 | case REQUEST_SENSE: | |
579 | case PERSISTENT_RESERVE_IN: | |
580 | case PERSISTENT_RESERVE_OUT: | |
581 | case READ_BUFFER: | |
582 | case WRITE_BUFFER: | |
583 | return 0; | |
584 | default: | |
1e3ab99d | 585 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
586 | return 1; |
587 | } | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | static inline int core_alua_state_unavailable( | |
593 | struct se_cmd *cmd, | |
1e3ab99d | 594 | unsigned char *cdb) |
c66ac9db NB |
595 | { |
596 | /* | |
597 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
598 | * spc4r17 section 5.9.2.4.5 | |
599 | */ | |
600 | switch (cdb[0]) { | |
601 | case INQUIRY: | |
602 | case REPORT_LUNS: | |
30f359a6 | 603 | return 0; |
c66ac9db | 604 | case MAINTENANCE_IN: |
ba539743 | 605 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
606 | case MI_REPORT_TARGET_PGS: |
607 | return 0; | |
608 | default: | |
1e3ab99d | 609 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
610 | return 1; |
611 | } | |
612 | case MAINTENANCE_OUT: | |
613 | switch (cdb[1]) { | |
614 | case MO_SET_TARGET_PGS: | |
615 | return 0; | |
616 | default: | |
1e3ab99d | 617 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
618 | return 1; |
619 | } | |
620 | case REQUEST_SENSE: | |
621 | case READ_BUFFER: | |
622 | case WRITE_BUFFER: | |
623 | return 0; | |
624 | default: | |
1e3ab99d | 625 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
626 | return 1; |
627 | } | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static inline int core_alua_state_transition( | |
633 | struct se_cmd *cmd, | |
1e3ab99d | 634 | unsigned char *cdb) |
c66ac9db NB |
635 | { |
636 | /* | |
f1ae05d5 | 637 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
638 | * spc4r17 section 5.9.2.5 |
639 | */ | |
640 | switch (cdb[0]) { | |
641 | case INQUIRY: | |
642 | case REPORT_LUNS: | |
30f359a6 | 643 | return 0; |
c66ac9db | 644 | case MAINTENANCE_IN: |
ba539743 | 645 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
646 | case MI_REPORT_TARGET_PGS: |
647 | return 0; | |
648 | default: | |
1e3ab99d | 649 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
650 | return 1; |
651 | } | |
652 | case REQUEST_SENSE: | |
653 | case READ_BUFFER: | |
654 | case WRITE_BUFFER: | |
655 | return 0; | |
656 | default: | |
1e3ab99d | 657 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
658 | return 1; |
659 | } | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | /* | |
f1ae05d5 | 665 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 666 | * return 0: Used to signal success |
f1ae05d5 | 667 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 668 | */ |
de103c93 CH |
669 | sense_reason_t |
670 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 671 | { |
c87fbd56 CH |
672 | struct se_device *dev = cmd->se_dev; |
673 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 674 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 675 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db | 676 | int out_alua_state, nonop_delay_msecs; |
c87fbd56 CH |
677 | |
678 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
679 | return 0; | |
530c6891 | 680 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) |
c87fbd56 | 681 | return 0; |
c66ac9db | 682 | |
c66ac9db NB |
683 | /* |
684 | * First, check for a struct se_port specific secondary ALUA target port | |
685 | * access state: OFFLINE | |
686 | */ | |
adf653f9 | 687 | if (atomic_read(&lun->lun_tg_pt_secondary_offline)) { |
6708bb27 | 688 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 689 | " target port\n"); |
1e3ab99d PB |
690 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
691 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db | 692 | } |
adf653f9 CH |
693 | |
694 | if (!lun->lun_tg_pt_gp) | |
89c12cc9 NB |
695 | return 0; |
696 | ||
adf653f9 CH |
697 | spin_lock(&lun->lun_tg_pt_gp_lock); |
698 | tg_pt_gp = lun->lun_tg_pt_gp; | |
d19c4643 | 699 | out_alua_state = tg_pt_gp->tg_pt_gp_alua_access_state; |
c66ac9db | 700 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; |
adf653f9 CH |
701 | |
702 | // XXX: keeps using tg_pt_gp witout reference after unlock | |
703 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db | 704 | /* |
73f3bf51 | 705 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 706 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
707 | * For the Optimized ALUA access state case, we want to process the |
708 | * incoming fabric cmd ASAP.. | |
709 | */ | |
73f3bf51 | 710 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
711 | return 0; |
712 | ||
713 | switch (out_alua_state) { | |
714 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 715 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 716 | break; |
c66ac9db | 717 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
718 | if (core_alua_state_standby(cmd, cdb)) |
719 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 720 | break; |
c66ac9db | 721 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
722 | if (core_alua_state_unavailable(cmd, cdb)) |
723 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 724 | break; |
c66ac9db | 725 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
726 | if (core_alua_state_transition(cmd, cdb)) |
727 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 728 | break; |
c66094bf | 729 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
730 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
731 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 732 | break; |
c66ac9db NB |
733 | /* |
734 | * OFFLINE is a secondary ALUA target port group access state, that is | |
adf653f9 | 735 | * handled above with struct se_lun->lun_tg_pt_secondary_offline=1 |
c66ac9db NB |
736 | */ |
737 | case ALUA_ACCESS_STATE_OFFLINE: | |
738 | default: | |
6708bb27 | 739 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 740 | out_alua_state); |
de103c93 | 741 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
742 | } |
743 | ||
de103c93 | 744 | return 0; |
c66ac9db NB |
745 | } |
746 | ||
747 | /* | |
125d0119 | 748 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 749 | */ |
de103c93 | 750 | static sense_reason_t |
1ca4d4fa | 751 | core_alua_check_transition(int state, int valid, int *primary, int explicit) |
c66ac9db | 752 | { |
bb91c1a0 HR |
753 | /* |
754 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
755 | * defined as primary target port asymmetric access states. | |
756 | */ | |
c66ac9db | 757 | switch (state) { |
73f3bf51 | 758 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
759 | if (!(valid & ALUA_AO_SUP)) |
760 | goto not_supported; | |
761 | *primary = 1; | |
762 | break; | |
c66ac9db | 763 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
764 | if (!(valid & ALUA_AN_SUP)) |
765 | goto not_supported; | |
766 | *primary = 1; | |
767 | break; | |
c66ac9db | 768 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
769 | if (!(valid & ALUA_S_SUP)) |
770 | goto not_supported; | |
771 | *primary = 1; | |
772 | break; | |
c66ac9db | 773 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
774 | if (!(valid & ALUA_U_SUP)) |
775 | goto not_supported; | |
c66ac9db NB |
776 | *primary = 1; |
777 | break; | |
c66094bf HR |
778 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
779 | if (!(valid & ALUA_LBD_SUP)) | |
780 | goto not_supported; | |
781 | *primary = 1; | |
782 | break; | |
c66ac9db NB |
783 | case ALUA_ACCESS_STATE_OFFLINE: |
784 | /* | |
785 | * OFFLINE state is defined as a secondary target port | |
786 | * asymmetric access state. | |
787 | */ | |
bb91c1a0 HR |
788 | if (!(valid & ALUA_O_SUP)) |
789 | goto not_supported; | |
c66ac9db NB |
790 | *primary = 0; |
791 | break; | |
bb91c1a0 | 792 | case ALUA_ACCESS_STATE_TRANSITION: |
1ca4d4fa MC |
793 | if (!(valid & ALUA_T_SUP) || explicit) |
794 | /* | |
795 | * Transitioning is set internally and by tcmu daemon, | |
796 | * and cannot be selected through a STPG. | |
797 | */ | |
798 | goto not_supported; | |
799 | *primary = 0; | |
800 | break; | |
c66ac9db | 801 | default: |
6708bb27 | 802 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 803 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
804 | } |
805 | ||
806 | return 0; | |
bb91c1a0 HR |
807 | |
808 | not_supported: | |
809 | pr_err("ALUA access state %s not supported", | |
810 | core_alua_dump_state(state)); | |
811 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
812 | } |
813 | ||
814 | static char *core_alua_dump_state(int state) | |
815 | { | |
816 | switch (state) { | |
73f3bf51 | 817 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
818 | return "Active/Optimized"; |
819 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
820 | return "Active/NonOptimized"; | |
c66094bf HR |
821 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
822 | return "LBA Dependent"; | |
c66ac9db NB |
823 | case ALUA_ACCESS_STATE_STANDBY: |
824 | return "Standby"; | |
825 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
826 | return "Unavailable"; | |
827 | case ALUA_ACCESS_STATE_OFFLINE: | |
828 | return "Offline"; | |
bb91c1a0 HR |
829 | case ALUA_ACCESS_STATE_TRANSITION: |
830 | return "Transitioning"; | |
c66ac9db NB |
831 | default: |
832 | return "Unknown"; | |
833 | } | |
834 | ||
835 | return NULL; | |
836 | } | |
837 | ||
838 | char *core_alua_dump_status(int status) | |
839 | { | |
840 | switch (status) { | |
841 | case ALUA_STATUS_NONE: | |
842 | return "None"; | |
125d0119 HR |
843 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
844 | return "Altered by Explicit STPG"; | |
845 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
846 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
847 | default: |
848 | return "Unknown"; | |
849 | } | |
850 | ||
851 | return NULL; | |
852 | } | |
853 | ||
854 | /* | |
855 | * Used by fabric modules to determine when we need to delay processing | |
856 | * for the Active/NonOptimized paths.. | |
857 | */ | |
858 | int core_alua_check_nonop_delay( | |
859 | struct se_cmd *cmd) | |
860 | { | |
861 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
862 | return 0; | |
863 | if (in_interrupt()) | |
864 | return 0; | |
865 | /* | |
866 | * The ALUA Active/NonOptimized access state delay can be disabled | |
867 | * in via configfs with a value of zero | |
868 | */ | |
6708bb27 | 869 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
870 | return 0; |
871 | /* | |
872 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
873 | * defined interval in core_alua_state_nonoptimized() | |
874 | */ | |
875 | msleep_interruptible(cmd->alua_nonop_delay); | |
876 | return 0; | |
877 | } | |
878 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
879 | ||
c66ac9db NB |
880 | static int core_alua_write_tpg_metadata( |
881 | const char *path, | |
882 | unsigned char *md_buf, | |
883 | u32 md_buf_len) | |
884 | { | |
0e9b10a9 | 885 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
e13ec939 | 886 | loff_t pos = 0; |
0e9b10a9 | 887 | int ret; |
c66ac9db | 888 | |
0e9b10a9 AV |
889 | if (IS_ERR(file)) { |
890 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
891 | return -ENODEV; |
892 | } | |
e13ec939 | 893 | ret = kernel_write(file, md_buf, md_buf_len, &pos); |
0e9b10a9 | 894 | if (ret < 0) |
6708bb27 | 895 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 896 | fput(file); |
f730f915 | 897 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
898 | } |
899 | ||
c66ac9db | 900 | static int core_alua_update_tpg_primary_metadata( |
9c6e164c | 901 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 902 | { |
1e0b9403 | 903 | unsigned char *md_buf; |
0fd97ccf | 904 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
55435bad | 905 | char *path; |
1e0b9403 HR |
906 | int len, rc; |
907 | ||
618baaf7 BVA |
908 | lockdep_assert_held(&tg_pt_gp->tg_pt_gp_transition_mutex); |
909 | ||
1e0b9403 HR |
910 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
911 | if (!md_buf) { | |
912 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
913 | return -ENOMEM; | |
914 | } | |
c66ac9db | 915 | |
1e0b9403 | 916 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
917 | "tg_pt_gp_id=%hu\n" |
918 | "alua_access_state=0x%02x\n" | |
919 | "alua_access_status=0x%02x\n", | |
9c6e164c | 920 | tg_pt_gp->tg_pt_gp_id, |
d19c4643 | 921 | tg_pt_gp->tg_pt_gp_alua_access_state, |
c66ac9db NB |
922 | tg_pt_gp->tg_pt_gp_alua_access_status); |
923 | ||
55435bad DD |
924 | rc = -ENOMEM; |
925 | path = kasprintf(GFP_KERNEL, "%s/alua/tpgs_%s/%s", db_root, | |
926 | &wwn->unit_serial[0], | |
927 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); | |
928 | if (path) { | |
929 | rc = core_alua_write_tpg_metadata(path, md_buf, len); | |
930 | kfree(path); | |
931 | } | |
1e0b9403 HR |
932 | kfree(md_buf); |
933 | return rc; | |
c66ac9db NB |
934 | } |
935 | ||
ee8c07d0 | 936 | static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db NB |
937 | { |
938 | struct se_dev_entry *se_deve; | |
adf653f9 | 939 | struct se_lun *lun; |
c66ac9db | 940 | struct se_lun_acl *lacl; |
c66ac9db NB |
941 | |
942 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
943 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
944 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
945 | /* |
946 | * After an implicit target port asymmetric access state | |
947 | * change, a device server shall establish a unit attention | |
948 | * condition for the initiator port associated with every I_T | |
949 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 950 | * ACCESS STATE CHANGED. |
c66ac9db NB |
951 | * |
952 | * After an explicit target port asymmetric access state | |
953 | * change, a device server shall establish a unit attention | |
954 | * condition with the additional sense code set to ASYMMETRIC | |
955 | * ACCESS STATE CHANGED for the initiator port associated with | |
956 | * every I_T nexus other than the I_T nexus on which the SET | |
957 | * TARGET PORT GROUPS command | |
958 | */ | |
9e37d042 NB |
959 | if (!percpu_ref_tryget_live(&lun->lun_ref)) |
960 | continue; | |
c66ac9db NB |
961 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
962 | ||
1adff1b3 | 963 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 964 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) { |
29a05dee | 965 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
adf653f9 | 966 | lockdep_is_held(&lun->lun_deve_lock)); |
c51c8e7b | 967 | |
c66ac9db | 968 | /* |
c51c8e7b HR |
969 | * spc4r37 p.242: |
970 | * After an explicit target port asymmetric access | |
971 | * state change, a device server shall establish a | |
972 | * unit attention condition with the additional sense | |
973 | * code set to ASYMMETRIC ACCESS STATE CHANGED for | |
974 | * the initiator port associated with every I_T nexus | |
975 | * other than the I_T nexus on which the SET TARGET | |
976 | * PORT GROUPS command was received. | |
c66ac9db | 977 | */ |
9c6e164c HR |
978 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
979 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
adf653f9 CH |
980 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
981 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
982 | continue; |
983 | ||
c51c8e7b HR |
984 | /* |
985 | * se_deve->se_lun_acl pointer may be NULL for a | |
986 | * entry created without explicit Node+MappedLUN ACLs | |
987 | */ | |
988 | if (lacl && (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
989 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl)) | |
990 | continue; | |
991 | ||
992 | core_scsi3_ua_allocate(se_deve, 0x2A, | |
c66ac9db NB |
993 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); |
994 | } | |
1adff1b3 | 995 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db NB |
996 | |
997 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 998 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
999 | } |
1000 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
ee8c07d0 HR |
1001 | } |
1002 | ||
9c6e164c HR |
1003 | static int core_alua_do_transition_tg_pt( |
1004 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1005 | int new_state, | |
1006 | int explicit) | |
1007 | { | |
d19c4643 | 1008 | int prev_state; |
9c6e164c | 1009 | |
d19c4643 | 1010 | mutex_lock(&tg_pt_gp->tg_pt_gp_transition_mutex); |
9c6e164c | 1011 | /* Nothing to be done here */ |
d19c4643 MC |
1012 | if (tg_pt_gp->tg_pt_gp_alua_access_state == new_state) { |
1013 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
9c6e164c | 1014 | return 0; |
d19c4643 | 1015 | } |
9c6e164c | 1016 | |
d19c4643 MC |
1017 | if (explicit && new_state == ALUA_ACCESS_STATE_TRANSITION) { |
1018 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
9c6e164c | 1019 | return -EAGAIN; |
d19c4643 | 1020 | } |
9c6e164c HR |
1021 | |
1022 | /* | |
1023 | * Save the old primary ALUA access state, and set the current state | |
1024 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1025 | */ | |
d19c4643 MC |
1026 | prev_state = tg_pt_gp->tg_pt_gp_alua_access_state; |
1027 | tg_pt_gp->tg_pt_gp_alua_access_state = ALUA_ACCESS_STATE_TRANSITION; | |
9c6e164c HR |
1028 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? |
1029 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1030 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1031 | ||
ee8c07d0 HR |
1032 | core_alua_queue_state_change_ua(tg_pt_gp); |
1033 | ||
d19c4643 MC |
1034 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) { |
1035 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
1ca4d4fa | 1036 | return 0; |
d19c4643 | 1037 | } |
1ca4d4fa | 1038 | |
9c6e164c HR |
1039 | /* |
1040 | * Check for the optional ALUA primary state transition delay | |
1041 | */ | |
1042 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1043 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1044 | ||
1045 | /* | |
d19c4643 | 1046 | * Set the current primary ALUA access state to the requested new state |
9c6e164c | 1047 | */ |
d19c4643 | 1048 | tg_pt_gp->tg_pt_gp_alua_access_state = new_state; |
9c6e164c | 1049 | |
d19c4643 MC |
1050 | /* |
1051 | * Update the ALUA metadata buf that has been allocated in | |
1052 | * core_alua_do_port_transition(), this metadata will be written | |
1053 | * to struct file. | |
1054 | * | |
1055 | * Note that there is the case where we do not want to update the | |
1056 | * metadata when the saved metadata is being parsed in userspace | |
1057 | * when setting the existing port access state and access status. | |
1058 | * | |
1059 | * Also note that the failure to write out the ALUA metadata to | |
1060 | * struct file does NOT affect the actual ALUA transition. | |
1061 | */ | |
1062 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1063 | core_alua_update_tpg_primary_metadata(tg_pt_gp); | |
9c6e164c | 1064 | } |
c66ac9db | 1065 | |
d19c4643 MC |
1066 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
1067 | " from primary access state %s to %s\n", (explicit) ? "explicit" : | |
1068 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
1069 | tg_pt_gp->tg_pt_gp_id, | |
1070 | core_alua_dump_state(prev_state), | |
1071 | core_alua_dump_state(new_state)); | |
1072 | ||
1073 | core_alua_queue_state_change_ua(tg_pt_gp); | |
1074 | ||
1075 | mutex_unlock(&tg_pt_gp->tg_pt_gp_transition_mutex); | |
c66ac9db NB |
1076 | return 0; |
1077 | } | |
1078 | ||
1079 | int core_alua_do_port_transition( | |
1080 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1081 | struct se_device *l_dev, | |
adf653f9 | 1082 | struct se_lun *l_lun, |
c66ac9db NB |
1083 | struct se_node_acl *l_nacl, |
1084 | int new_state, | |
125d0119 | 1085 | int explicit) |
c66ac9db NB |
1086 | { |
1087 | struct se_device *dev; | |
c66ac9db NB |
1088 | struct t10_alua_lu_gp *lu_gp; |
1089 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1090 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1091 | int primary, valid_states, rc = 0; |
c66ac9db | 1092 | |
0a414572 MC |
1093 | if (l_dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) |
1094 | return -ENODEV; | |
1095 | ||
bb91c1a0 | 1096 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1ca4d4fa MC |
1097 | if (core_alua_check_transition(new_state, valid_states, &primary, |
1098 | explicit) != 0) | |
c66ac9db NB |
1099 | return -EINVAL; |
1100 | ||
c66ac9db NB |
1101 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1102 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1103 | lu_gp = local_lu_gp_mem->lu_gp; | |
1104 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1105 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1106 | /* | |
1107 | * For storage objects that are members of the 'default_lu_gp', | |
1108 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1109 | * on all of the matching target port groups IDs in default_lu_gp. | |
1110 | */ | |
6708bb27 | 1111 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1112 | /* |
1113 | * core_alua_do_transition_tg_pt() will always return | |
1114 | * success. | |
1115 | */ | |
adf653f9 | 1116 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1117 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1118 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1119 | new_state, explicit); | |
33940d09 | 1120 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1121 | return rc; |
c66ac9db NB |
1122 | } |
1123 | /* | |
1124 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1125 | * the associated storage objects looking for a matching target port | |
1126 | * group ID from the local target port group. | |
1127 | */ | |
1128 | spin_lock(&lu_gp->lu_gp_lock); | |
1129 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1130 | lu_gp_mem_list) { | |
1131 | ||
1132 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1133 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1134 | spin_unlock(&lu_gp->lu_gp_lock); |
1135 | ||
0fd97ccf | 1136 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1137 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1138 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1139 | tg_pt_gp_list) { |
1140 | ||
6708bb27 | 1141 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1142 | continue; |
1143 | /* | |
1144 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1145 | * is changed for any target port group accessible via |
c66ac9db NB |
1146 | * a logical unit within a LU group, the target port |
1147 | * behavior group asymmetric access states for the same | |
1148 | * target port group accessible via other logical units | |
1149 | * in that LU group will also change. | |
1150 | */ | |
1151 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1152 | continue; | |
1153 | ||
1154 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1155 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1156 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1157 | } else { |
adf653f9 | 1158 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1159 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1160 | } |
33940d09 | 1161 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1162 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1163 | /* |
1164 | * core_alua_do_transition_tg_pt() will always return | |
1165 | * success. | |
1166 | */ | |
9c6e164c HR |
1167 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1168 | new_state, explicit); | |
c66ac9db | 1169 | |
0fd97ccf | 1170 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1171 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1172 | if (rc) |
1173 | break; | |
c66ac9db | 1174 | } |
0fd97ccf | 1175 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1176 | |
1177 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1178 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1179 | } |
1180 | spin_unlock(&lu_gp->lu_gp_lock); | |
1181 | ||
9c6e164c HR |
1182 | if (!rc) { |
1183 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1184 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1185 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1186 | l_tg_pt_gp->tg_pt_gp_id, | |
1187 | (explicit) ? "explicit" : "implicit", | |
1188 | core_alua_dump_state(new_state)); | |
1189 | } | |
c66ac9db | 1190 | |
33940d09 | 1191 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1192 | return rc; |
c66ac9db NB |
1193 | } |
1194 | ||
adf653f9 | 1195 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1196 | { |
adf653f9 | 1197 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1198 | unsigned char *md_buf; |
55435bad | 1199 | char *path; |
1e0b9403 HR |
1200 | int len, rc; |
1201 | ||
adf653f9 CH |
1202 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1203 | ||
1e0b9403 HR |
1204 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1205 | if (!md_buf) { | |
1206 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1207 | rc = -ENOMEM; |
1208 | goto out_unlock; | |
1e0b9403 | 1209 | } |
c66ac9db | 1210 | |
1e0b9403 | 1211 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1212 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1213 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1214 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1215 | |
55435bad DD |
1216 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) { |
1217 | path = kasprintf(GFP_KERNEL, "%s/alua/%s/%s+%hu/lun_%llu", | |
30c7ca93 | 1218 | db_root, se_tpg->se_tpg_tfo->fabric_name, |
55435bad DD |
1219 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), |
1220 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg), | |
1221 | lun->unpacked_lun); | |
1222 | } else { | |
1223 | path = kasprintf(GFP_KERNEL, "%s/alua/%s/%s/lun_%llu", | |
30c7ca93 | 1224 | db_root, se_tpg->se_tpg_tfo->fabric_name, |
55435bad DD |
1225 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), |
1226 | lun->unpacked_lun); | |
1227 | } | |
1228 | if (!path) { | |
1229 | rc = -ENOMEM; | |
1230 | goto out_free; | |
1231 | } | |
c66ac9db | 1232 | |
1e0b9403 | 1233 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
55435bad DD |
1234 | kfree(path); |
1235 | out_free: | |
1e0b9403 | 1236 | kfree(md_buf); |
adf653f9 CH |
1237 | out_unlock: |
1238 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1239 | return rc; |
c66ac9db NB |
1240 | } |
1241 | ||
1242 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1243 | struct se_lun *lun, |
125d0119 | 1244 | int explicit, |
c66ac9db NB |
1245 | int offline) |
1246 | { | |
1247 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1248 | int trans_delay_msecs; |
1249 | ||
adf653f9 CH |
1250 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1251 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1252 | if (!tg_pt_gp) { |
adf653f9 | 1253 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1254 | pr_err("Unable to complete secondary state" |
c66ac9db | 1255 | " transition\n"); |
e3d6f909 | 1256 | return -EINVAL; |
c66ac9db NB |
1257 | } |
1258 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1259 | /* | |
1260 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1261 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1262 | */ |
1263 | if (offline) | |
adf653f9 | 1264 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1265 | else |
adf653f9 | 1266 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1267 | |
adf653f9 | 1268 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1269 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1270 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1271 | |
6708bb27 | 1272 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1273 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1274 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1275 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1276 | ||
adf653f9 | 1277 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1278 | /* |
1279 | * Do the optional transition delay after we set the secondary | |
1280 | * ALUA access state. | |
1281 | */ | |
1282 | if (trans_delay_msecs != 0) | |
1283 | msleep_interruptible(trans_delay_msecs); | |
1284 | /* | |
1285 | * See if we need to update the ALUA fabric port metadata for | |
1286 | * secondary state and status | |
1287 | */ | |
adf653f9 CH |
1288 | if (lun->lun_tg_pt_secondary_write_md) |
1289 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1290 | |
1291 | return 0; | |
1292 | } | |
1293 | ||
229d4f11 HR |
1294 | struct t10_alua_lba_map * |
1295 | core_alua_allocate_lba_map(struct list_head *list, | |
1296 | u64 first_lba, u64 last_lba) | |
1297 | { | |
1298 | struct t10_alua_lba_map *lba_map; | |
1299 | ||
1300 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1301 | if (!lba_map) { | |
1302 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1303 | return ERR_PTR(-ENOMEM); | |
1304 | } | |
1305 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1306 | lba_map->lba_map_first_lba = first_lba; | |
1307 | lba_map->lba_map_last_lba = last_lba; | |
1308 | ||
1309 | list_add_tail(&lba_map->lba_map_list, list); | |
1310 | return lba_map; | |
1311 | } | |
1312 | ||
1313 | int | |
1314 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1315 | int pg_id, int state) | |
1316 | { | |
1317 | struct t10_alua_lba_map_member *lba_map_mem; | |
1318 | ||
1319 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1320 | lba_map_mem_list) { | |
1321 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1322 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1323 | return -EINVAL; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1328 | if (!lba_map_mem) { | |
1329 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1330 | return -ENOMEM; | |
1331 | } | |
1332 | lba_map_mem->lba_map_mem_alua_state = state; | |
1333 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1334 | ||
1335 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1336 | &lba_map->lba_map_mem_list); | |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | void | |
1341 | core_alua_free_lba_map(struct list_head *lba_list) | |
1342 | { | |
1343 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1344 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1345 | ||
1346 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1347 | lba_map_list) { | |
1348 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1349 | &lba_map->lba_map_mem_list, | |
1350 | lba_map_mem_list) { | |
1351 | list_del(&lba_map_mem->lba_map_mem_list); | |
1352 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1353 | lba_map_mem); | |
1354 | } | |
1355 | list_del(&lba_map->lba_map_list); | |
1356 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | void | |
1361 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1362 | int segment_size, int segment_mult) | |
1363 | { | |
1364 | struct list_head old_lba_map_list; | |
1365 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1366 | int activate = 0, supported; | |
1367 | ||
1368 | INIT_LIST_HEAD(&old_lba_map_list); | |
1369 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1370 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1371 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1372 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1373 | if (lba_map_list) { | |
1374 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1375 | activate = 1; | |
1376 | } | |
1377 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1378 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1379 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1380 | tg_pt_gp_list) { | |
1381 | ||
1382 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1383 | continue; | |
1384 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1385 | if (activate) | |
1386 | supported |= ALUA_LBD_SUP; | |
1387 | else | |
1388 | supported &= ~ALUA_LBD_SUP; | |
1389 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1390 | } | |
1391 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1392 | core_alua_free_lba_map(&old_lba_map_list); | |
1393 | } | |
1394 | ||
c66ac9db NB |
1395 | struct t10_alua_lu_gp * |
1396 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1397 | { | |
1398 | struct t10_alua_lu_gp *lu_gp; | |
1399 | ||
1400 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1401 | if (!lu_gp) { |
1402 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1403 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1404 | } |
e3d6f909 | 1405 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1406 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1407 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1408 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1409 | ||
1410 | if (def_group) { | |
e3d6f909 | 1411 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1412 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1413 | alua_lu_gps_count++; |
c66ac9db NB |
1414 | } |
1415 | ||
1416 | return lu_gp; | |
1417 | } | |
1418 | ||
1419 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1420 | { | |
1421 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1422 | u16 lu_gp_id_tmp; | |
1423 | /* | |
1424 | * The lu_gp->lu_gp_id may only be set once.. | |
1425 | */ | |
1426 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1427 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1428 | " ignoring request\n"); |
e3d6f909 | 1429 | return -EINVAL; |
c66ac9db NB |
1430 | } |
1431 | ||
e3d6f909 AG |
1432 | spin_lock(&lu_gps_lock); |
1433 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1434 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1435 | " 0x0000ffff reached\n"); |
e3d6f909 | 1436 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1437 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1438 | return -ENOSPC; |
c66ac9db NB |
1439 | } |
1440 | again: | |
1441 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1442 | alua_lu_gps_counter++; |
c66ac9db | 1443 | |
e3d6f909 | 1444 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1445 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1446 | if (!lu_gp_id) |
c66ac9db NB |
1447 | goto again; |
1448 | ||
6708bb27 | 1449 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1450 | " already exists, ignoring request\n", |
1451 | lu_gp_id); | |
e3d6f909 AG |
1452 | spin_unlock(&lu_gps_lock); |
1453 | return -EINVAL; | |
c66ac9db NB |
1454 | } |
1455 | } | |
1456 | ||
1457 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1458 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1459 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1460 | alua_lu_gps_count++; | |
1461 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1462 | |
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | static struct t10_alua_lu_gp_member * | |
1467 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1468 | { | |
1469 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1470 | ||
1471 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1472 | if (!lu_gp_mem) { |
1473 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1474 | return ERR_PTR(-ENOMEM); |
1475 | } | |
1476 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1477 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1478 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1479 | ||
1480 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1481 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1482 | ||
1483 | return lu_gp_mem; | |
1484 | } | |
1485 | ||
1486 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1487 | { | |
1488 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1489 | /* | |
1490 | * Once we have reached this point, config_item_put() has | |
1491 | * already been called from target_core_alua_drop_lu_gp(). | |
1492 | * | |
1493 | * Here, we remove the *lu_gp from the global list so that | |
1494 | * no associations can be made while we are releasing | |
1495 | * struct t10_alua_lu_gp. | |
1496 | */ | |
e3d6f909 | 1497 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1498 | list_del(&lu_gp->lu_gp_node); |
1499 | alua_lu_gps_count--; | |
1500 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1501 | /* |
1502 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1503 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1504 | * released with core_alua_put_lu_gp_from_name() | |
1505 | */ | |
1506 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1507 | cpu_relax(); | |
1508 | /* | |
1509 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1510 | * struct se_device. | |
1511 | */ | |
1512 | spin_lock(&lu_gp->lu_gp_lock); | |
1513 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1514 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1515 | if (lu_gp_mem->lu_gp_assoc) { | |
1516 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1517 | lu_gp->lu_gp_members--; | |
1518 | lu_gp_mem->lu_gp_assoc = 0; | |
1519 | } | |
1520 | spin_unlock(&lu_gp->lu_gp_lock); | |
1521 | /* | |
1522 | * | |
25985edc | 1523 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1524 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1525 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1526 | * | |
1527 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1528 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1529 | */ |
1530 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1531 | if (lu_gp != default_lu_gp) |
c66ac9db | 1532 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1533 | default_lu_gp); |
c66ac9db NB |
1534 | else |
1535 | lu_gp_mem->lu_gp = NULL; | |
1536 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1537 | ||
1538 | spin_lock(&lu_gp->lu_gp_lock); | |
1539 | } | |
1540 | spin_unlock(&lu_gp->lu_gp_lock); | |
1541 | ||
1542 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1543 | } | |
1544 | ||
1545 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1546 | { | |
c66ac9db NB |
1547 | struct t10_alua_lu_gp *lu_gp; |
1548 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1549 | ||
c66ac9db | 1550 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1551 | if (!lu_gp_mem) |
c66ac9db NB |
1552 | return; |
1553 | ||
1554 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1555 | cpu_relax(); | |
1556 | ||
1557 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1558 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1559 | if (lu_gp) { |
c66ac9db NB |
1560 | spin_lock(&lu_gp->lu_gp_lock); |
1561 | if (lu_gp_mem->lu_gp_assoc) { | |
1562 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1563 | lu_gp->lu_gp_members--; | |
1564 | lu_gp_mem->lu_gp_assoc = 0; | |
1565 | } | |
1566 | spin_unlock(&lu_gp->lu_gp_lock); | |
1567 | lu_gp_mem->lu_gp = NULL; | |
1568 | } | |
1569 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1570 | ||
1571 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1572 | } | |
1573 | ||
1574 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1575 | { | |
1576 | struct t10_alua_lu_gp *lu_gp; | |
1577 | struct config_item *ci; | |
1578 | ||
e3d6f909 AG |
1579 | spin_lock(&lu_gps_lock); |
1580 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1581 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1582 | continue; |
1583 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1584 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1585 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1586 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1587 | return lu_gp; |
1588 | } | |
1589 | } | |
e3d6f909 | 1590 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1591 | |
1592 | return NULL; | |
1593 | } | |
1594 | ||
1595 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1596 | { | |
e3d6f909 | 1597 | spin_lock(&lu_gps_lock); |
c66ac9db | 1598 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1599 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1600 | } |
1601 | ||
1602 | /* | |
1603 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1604 | */ | |
1605 | void __core_alua_attach_lu_gp_mem( | |
1606 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1607 | struct t10_alua_lu_gp *lu_gp) | |
1608 | { | |
1609 | spin_lock(&lu_gp->lu_gp_lock); | |
1610 | lu_gp_mem->lu_gp = lu_gp; | |
1611 | lu_gp_mem->lu_gp_assoc = 1; | |
1612 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1613 | lu_gp->lu_gp_members++; | |
1614 | spin_unlock(&lu_gp->lu_gp_lock); | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1619 | */ | |
1620 | void __core_alua_drop_lu_gp_mem( | |
1621 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1622 | struct t10_alua_lu_gp *lu_gp) | |
1623 | { | |
1624 | spin_lock(&lu_gp->lu_gp_lock); | |
1625 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1626 | lu_gp_mem->lu_gp = NULL; | |
1627 | lu_gp_mem->lu_gp_assoc = 0; | |
1628 | lu_gp->lu_gp_members--; | |
1629 | spin_unlock(&lu_gp->lu_gp_lock); | |
1630 | } | |
1631 | ||
0fd97ccf CH |
1632 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1633 | const char *name, int def_group) | |
c66ac9db NB |
1634 | { |
1635 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1636 | ||
1637 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1638 | if (!tg_pt_gp) { |
1639 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1640 | return NULL; |
1641 | } | |
1642 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1643 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
d19c4643 | 1644 | mutex_init(&tg_pt_gp->tg_pt_gp_transition_mutex); |
c66ac9db NB |
1645 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); |
1646 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
0fd97ccf | 1647 | tg_pt_gp->tg_pt_gp_dev = dev; |
d19c4643 MC |
1648 | tg_pt_gp->tg_pt_gp_alua_access_state = |
1649 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; | |
c66ac9db | 1650 | /* |
125d0119 | 1651 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1652 | */ |
1653 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1654 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1655 | /* |
1656 | * Set the default Active/NonOptimized Delay in milliseconds | |
1657 | */ | |
1658 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1659 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1660 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1661 | |
c0dc941e HR |
1662 | /* |
1663 | * Enable all supported states | |
1664 | */ | |
1665 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1666 | ALUA_T_SUP | ALUA_O_SUP | | |
1667 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1668 | ||
c66ac9db | 1669 | if (def_group) { |
0fd97ccf | 1670 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1671 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1672 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1673 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1674 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1675 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1676 | &dev->t10_alua.tg_pt_gps_list); |
1677 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1678 | } |
1679 | ||
1680 | return tg_pt_gp; | |
1681 | } | |
1682 | ||
1683 | int core_alua_set_tg_pt_gp_id( | |
1684 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1685 | u16 tg_pt_gp_id) | |
1686 | { | |
0fd97ccf | 1687 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1688 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1689 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1690 | |
c66ac9db NB |
1691 | /* |
1692 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1693 | */ | |
1694 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1695 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1696 | " ignoring request\n"); |
e3d6f909 | 1697 | return -EINVAL; |
c66ac9db NB |
1698 | } |
1699 | ||
0fd97ccf CH |
1700 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1701 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1702 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1703 | " 0x0000ffff reached\n"); |
0fd97ccf | 1704 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1705 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1706 | return -ENOSPC; |
c66ac9db NB |
1707 | } |
1708 | again: | |
1709 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1710 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1711 | |
0fd97ccf | 1712 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1713 | tg_pt_gp_list) { |
1714 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1715 | if (!tg_pt_gp_id) |
c66ac9db NB |
1716 | goto again; |
1717 | ||
6708bb27 | 1718 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1719 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1720 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1721 | return -EINVAL; |
c66ac9db NB |
1722 | } |
1723 | } | |
1724 | ||
1725 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1726 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1727 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1728 | &dev->t10_alua.tg_pt_gps_list); |
1729 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1730 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1731 | |
1732 | return 0; | |
1733 | } | |
1734 | ||
c66ac9db NB |
1735 | void core_alua_free_tg_pt_gp( |
1736 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1737 | { | |
0fd97ccf | 1738 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1739 | struct se_lun *lun, *next; |
0fd97ccf | 1740 | |
c66ac9db NB |
1741 | /* |
1742 | * Once we have reached this point, config_item_put() has already | |
1743 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1744 | * | |
1745 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1746 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1747 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1748 | */ | |
0fd97ccf | 1749 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
82129697 | 1750 | if (tg_pt_gp->tg_pt_gp_valid_id) { |
1751 | list_del(&tg_pt_gp->tg_pt_gp_list); | |
1752 | dev->t10_alua.alua_tg_pt_gps_count--; | |
1753 | } | |
0fd97ccf CH |
1754 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1755 | ||
c66ac9db NB |
1756 | /* |
1757 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1758 | * core_alua_get_tg_pt_gp_by_name() in | |
1759 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1760 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1761 | */ | |
1762 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1763 | cpu_relax(); | |
0fd97ccf | 1764 | |
c66ac9db NB |
1765 | /* |
1766 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1767 | * struct se_port. | |
1768 | */ | |
1769 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1770 | list_for_each_entry_safe(lun, next, |
1771 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1772 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1773 | tg_pt_gp->tg_pt_gp_members--; | |
1774 | ||
c66ac9db NB |
1775 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1776 | /* | |
c66ac9db | 1777 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1778 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1779 | * default_tg_pt_gp. |
1780 | */ | |
adf653f9 | 1781 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1782 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1783 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1784 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1785 | } else |
adf653f9 CH |
1786 | lun->lun_tg_pt_gp = NULL; |
1787 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1788 | |
1789 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1790 | } | |
1791 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1792 | ||
1793 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1794 | } | |
1795 | ||
c66ac9db | 1796 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1797 | struct se_device *dev, const char *name) |
c66ac9db NB |
1798 | { |
1799 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1800 | struct config_item *ci; | |
1801 | ||
0fd97ccf CH |
1802 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1803 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1804 | tg_pt_gp_list) { |
6708bb27 | 1805 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1806 | continue; |
1807 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1808 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1809 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1810 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1811 | return tg_pt_gp; |
1812 | } | |
1813 | } | |
0fd97ccf | 1814 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1815 | |
1816 | return NULL; | |
1817 | } | |
1818 | ||
1819 | static void core_alua_put_tg_pt_gp_from_name( | |
1820 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1821 | { | |
0fd97ccf | 1822 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1823 | |
0fd97ccf | 1824 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1825 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1826 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1827 | } |
1828 | ||
adf653f9 CH |
1829 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1830 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1831 | { |
3dd348fc HR |
1832 | struct se_dev_entry *se_deve; |
1833 | ||
adf653f9 CH |
1834 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1835 | ||
c66ac9db | 1836 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1837 | lun->lun_tg_pt_gp = tg_pt_gp; |
1838 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db | 1839 | tg_pt_gp->tg_pt_gp_members++; |
3dd348fc HR |
1840 | spin_lock(&lun->lun_deve_lock); |
1841 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) | |
1842 | core_scsi3_ua_allocate(se_deve, 0x3f, | |
1843 | ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); | |
1844 | spin_unlock(&lun->lun_deve_lock); | |
c66ac9db NB |
1845 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1846 | } | |
1847 | ||
adf653f9 CH |
1848 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1849 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1850 | { |
adf653f9 CH |
1851 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1852 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1853 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1854 | } | |
1855 | ||
1856 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1857 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1858 | { |
adf653f9 CH |
1859 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1860 | ||
c66ac9db | 1861 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1862 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1863 | tg_pt_gp->tg_pt_gp_members--; |
1864 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1865 | |
1866 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1867 | } |
1868 | ||
adf653f9 CH |
1869 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1870 | { | |
1871 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1872 | ||
1873 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1874 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1875 | if (tg_pt_gp) | |
1876 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1877 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1878 | } | |
1879 | ||
1880 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1881 | { |
c66ac9db | 1882 | struct config_item *tg_pt_ci; |
c66ac9db | 1883 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1884 | ssize_t len = 0; |
1885 | ||
adf653f9 CH |
1886 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1887 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1888 | if (tg_pt_gp) { |
c66ac9db NB |
1889 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1890 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1891 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1892 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1893 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1894 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
d19c4643 MC |
1895 | core_alua_dump_state( |
1896 | tg_pt_gp->tg_pt_gp_alua_access_state), | |
c66ac9db NB |
1897 | core_alua_dump_status( |
1898 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1899 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1900 | "Offline" : "None", |
adf653f9 | 1901 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1902 | } |
adf653f9 | 1903 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1904 | |
1905 | return len; | |
1906 | } | |
1907 | ||
1908 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1909 | struct se_lun *lun, |
c66ac9db NB |
1910 | const char *page, |
1911 | size_t count) | |
1912 | { | |
adf653f9 | 1913 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1914 | /* |
1915 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1916 | * reference to se_device->dev_group. | |
1917 | */ | |
1918 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1919 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1920 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1921 | int move = 0; | |
1922 | ||
530c6891 | 1923 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA || |
adf653f9 CH |
1924 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
1925 | return -ENODEV; | |
c66ac9db NB |
1926 | |
1927 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1928 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1929 | return -EINVAL; |
1930 | } | |
1931 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1932 | memcpy(buf, page, count); | |
1933 | /* | |
1934 | * Any ALUA target port group alias besides "NULL" means we will be | |
1935 | * making a new group association. | |
1936 | */ | |
1937 | if (strcmp(strstrip(buf), "NULL")) { | |
1938 | /* | |
1939 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1940 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1941 | * core_alua_put_tg_pt_gp_from_name() below. | |
1942 | */ | |
0fd97ccf | 1943 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1944 | strstrip(buf)); |
6708bb27 | 1945 | if (!tg_pt_gp_new) |
c66ac9db NB |
1946 | return -ENODEV; |
1947 | } | |
c66ac9db | 1948 | |
adf653f9 CH |
1949 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1950 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1951 | if (tg_pt_gp) { |
c66ac9db NB |
1952 | /* |
1953 | * Clearing an existing tg_pt_gp association, and replacing | |
1954 | * with the default_tg_pt_gp. | |
1955 | */ | |
6708bb27 AG |
1956 | if (!tg_pt_gp_new) { |
1957 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
1958 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
1959 | " alua/%s, ID: %hu back to" | |
1960 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
1961 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1962 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1963 | config_item_name(&lun->lun_group.cg_item), |
1964 | config_item_name( | |
1965 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
1966 | tg_pt_gp->tg_pt_gp_id); | |
1967 | ||
adf653f9 CH |
1968 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
1969 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 1970 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 1971 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1972 | |
1973 | return count; | |
1974 | } | |
adf653f9 | 1975 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
1976 | move = 1; |
1977 | } | |
adf653f9 CH |
1978 | |
1979 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
1980 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 1981 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 1982 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
1983 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1984 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1985 | config_item_name(&lun->lun_group.cg_item), |
1986 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
1987 | tg_pt_gp_new->tg_pt_gp_id); | |
1988 | ||
1989 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
1990 | return count; | |
1991 | } | |
1992 | ||
1993 | ssize_t core_alua_show_access_type( | |
1994 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1995 | char *page) | |
1996 | { | |
125d0119 HR |
1997 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
1998 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
1999 | return sprintf(page, "Implicit and Explicit\n"); | |
2000 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2001 | return sprintf(page, "Implicit\n"); | |
2002 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2003 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2004 | else |
2005 | return sprintf(page, "None\n"); | |
2006 | } | |
2007 | ||
2008 | ssize_t core_alua_store_access_type( | |
2009 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2010 | const char *page, | |
2011 | size_t count) | |
2012 | { | |
2013 | unsigned long tmp; | |
2014 | int ret; | |
2015 | ||
57103d7f | 2016 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2017 | if (ret < 0) { |
6708bb27 | 2018 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2019 | return ret; |
c66ac9db NB |
2020 | } |
2021 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2022 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2023 | " %lu\n", tmp); |
2024 | return -EINVAL; | |
2025 | } | |
2026 | if (tmp == 3) | |
2027 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2028 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2029 | else if (tmp == 2) |
125d0119 | 2030 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2031 | else if (tmp == 1) |
125d0119 | 2032 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2033 | else |
2034 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2035 | ||
2036 | return count; | |
2037 | } | |
2038 | ||
2039 | ssize_t core_alua_show_nonop_delay_msecs( | |
2040 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2041 | char *page) | |
2042 | { | |
2043 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2044 | } | |
2045 | ||
2046 | ssize_t core_alua_store_nonop_delay_msecs( | |
2047 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2048 | const char *page, | |
2049 | size_t count) | |
2050 | { | |
2051 | unsigned long tmp; | |
2052 | int ret; | |
2053 | ||
57103d7f | 2054 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2055 | if (ret < 0) { |
6708bb27 | 2056 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2057 | return ret; |
c66ac9db NB |
2058 | } |
2059 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2060 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2061 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2062 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2063 | return -EINVAL; | |
2064 | } | |
2065 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2066 | ||
2067 | return count; | |
2068 | } | |
2069 | ||
2070 | ssize_t core_alua_show_trans_delay_msecs( | |
2071 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2072 | char *page) | |
2073 | { | |
2074 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2075 | } | |
2076 | ||
2077 | ssize_t core_alua_store_trans_delay_msecs( | |
2078 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2079 | const char *page, | |
2080 | size_t count) | |
2081 | { | |
2082 | unsigned long tmp; | |
2083 | int ret; | |
2084 | ||
57103d7f | 2085 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2086 | if (ret < 0) { |
6708bb27 | 2087 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2088 | return ret; |
c66ac9db NB |
2089 | } |
2090 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2091 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2092 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2093 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2094 | return -EINVAL; | |
2095 | } | |
2096 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2097 | ||
2098 | return count; | |
2099 | } | |
2100 | ||
125d0119 | 2101 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2102 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2103 | char *page) | |
2104 | { | |
125d0119 | 2105 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2106 | } |
2107 | ||
125d0119 | 2108 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2109 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2110 | const char *page, | |
2111 | size_t count) | |
2112 | { | |
2113 | unsigned long tmp; | |
2114 | int ret; | |
2115 | ||
57103d7f | 2116 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2117 | if (ret < 0) { |
125d0119 | 2118 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2119 | return ret; |
5b9a4d72 | 2120 | } |
125d0119 HR |
2121 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2122 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2123 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2124 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2125 | return -EINVAL; |
2126 | } | |
125d0119 | 2127 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2128 | |
2129 | return count; | |
2130 | } | |
2131 | ||
c66ac9db NB |
2132 | ssize_t core_alua_show_preferred_bit( |
2133 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2134 | char *page) | |
2135 | { | |
2136 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2137 | } | |
2138 | ||
2139 | ssize_t core_alua_store_preferred_bit( | |
2140 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2141 | const char *page, | |
2142 | size_t count) | |
2143 | { | |
2144 | unsigned long tmp; | |
2145 | int ret; | |
2146 | ||
57103d7f | 2147 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2148 | if (ret < 0) { |
6708bb27 | 2149 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2150 | return ret; |
c66ac9db NB |
2151 | } |
2152 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2153 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2154 | return -EINVAL; |
2155 | } | |
2156 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2157 | ||
2158 | return count; | |
2159 | } | |
2160 | ||
2161 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2162 | { | |
c66ac9db | 2163 | return sprintf(page, "%d\n", |
adf653f9 | 2164 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2165 | } |
2166 | ||
2167 | ssize_t core_alua_store_offline_bit( | |
2168 | struct se_lun *lun, | |
2169 | const char *page, | |
2170 | size_t count) | |
2171 | { | |
4cc987ea NB |
2172 | /* |
2173 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2174 | * reference to se_device->dev_group. | |
2175 | */ | |
2176 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2177 | unsigned long tmp; |
2178 | int ret; | |
2179 | ||
530c6891 | 2180 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA || |
adf653f9 | 2181 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
c66ac9db NB |
2182 | return -ENODEV; |
2183 | ||
57103d7f | 2184 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2185 | if (ret < 0) { |
6708bb27 | 2186 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2187 | return ret; |
c66ac9db NB |
2188 | } |
2189 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2190 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2191 | tmp); |
2192 | return -EINVAL; | |
2193 | } | |
c66ac9db | 2194 | |
adf653f9 | 2195 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2196 | if (ret < 0) |
2197 | return -EINVAL; | |
2198 | ||
2199 | return count; | |
2200 | } | |
2201 | ||
2202 | ssize_t core_alua_show_secondary_status( | |
2203 | struct se_lun *lun, | |
2204 | char *page) | |
2205 | { | |
adf653f9 | 2206 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2207 | } |
2208 | ||
2209 | ssize_t core_alua_store_secondary_status( | |
2210 | struct se_lun *lun, | |
2211 | const char *page, | |
2212 | size_t count) | |
2213 | { | |
2214 | unsigned long tmp; | |
2215 | int ret; | |
2216 | ||
57103d7f | 2217 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2218 | if (ret < 0) { |
6708bb27 | 2219 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2220 | return ret; |
c66ac9db NB |
2221 | } |
2222 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2223 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2224 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2225 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2226 | tmp); |
2227 | return -EINVAL; | |
2228 | } | |
adf653f9 | 2229 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2230 | |
2231 | return count; | |
2232 | } | |
2233 | ||
2234 | ssize_t core_alua_show_secondary_write_metadata( | |
2235 | struct se_lun *lun, | |
2236 | char *page) | |
2237 | { | |
adf653f9 | 2238 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2239 | } |
2240 | ||
2241 | ssize_t core_alua_store_secondary_write_metadata( | |
2242 | struct se_lun *lun, | |
2243 | const char *page, | |
2244 | size_t count) | |
2245 | { | |
2246 | unsigned long tmp; | |
2247 | int ret; | |
2248 | ||
57103d7f | 2249 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2250 | if (ret < 0) { |
6708bb27 | 2251 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2252 | return ret; |
c66ac9db NB |
2253 | } |
2254 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2255 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2256 | " %lu\n", tmp); |
2257 | return -EINVAL; | |
2258 | } | |
adf653f9 | 2259 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2260 | |
2261 | return count; | |
2262 | } | |
2263 | ||
0fd97ccf | 2264 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2265 | { |
530c6891 MC |
2266 | if (!(dev->transport->transport_flags & |
2267 | TRANSPORT_FLAG_PASSTHROUGH_ALUA) && | |
c87fbd56 CH |
2268 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2269 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2270 | |
c66ac9db | 2271 | /* |
25985edc | 2272 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2273 | * LUN Group. |
2274 | */ | |
2275 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2276 | if (IS_ERR(lu_gp_mem)) |
2277 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2278 | |
c66ac9db NB |
2279 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2280 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2281 | default_lu_gp); |
c66ac9db NB |
2282 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2283 | ||
6708bb27 | 2284 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2285 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2286 | dev->transport->name); |
c66ac9db NB |
2287 | } |
2288 | ||
2289 | return 0; | |
2290 | } |