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Commit | Line | Data |
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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> | |
c53181af | 29 | #include <linux/export.h> |
0e9b10a9 | 30 | #include <linux/file.h> |
c66ac9db NB |
31 | #include <scsi/scsi.h> |
32 | #include <scsi/scsi_cmnd.h> | |
33395fb8 | 33 | #include <asm/unaligned.h> |
c66ac9db NB |
34 | |
35 | #include <target/target_core_base.h> | |
c4795fb2 CH |
36 | #include <target/target_core_backend.h> |
37 | #include <target/target_core_fabric.h> | |
c66ac9db | 38 | |
e26d99ae | 39 | #include "target_core_internal.h" |
c66ac9db | 40 | #include "target_core_alua.h" |
c66ac9db NB |
41 | #include "target_core_ua.h" |
42 | ||
bb91c1a0 HR |
43 | static sense_reason_t core_alua_check_transition(int state, int valid, |
44 | int *primary); | |
c66ac9db | 45 | static int core_alua_set_tg_pt_secondary_state( |
adf653f9 | 46 | struct se_lun *lun, int explicit, int offline); |
c66ac9db | 47 | |
bb91c1a0 HR |
48 | static char *core_alua_dump_state(int state); |
49 | ||
adf653f9 CH |
50 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
51 | struct t10_alua_tg_pt_gp *tg_pt_gp); | |
52 | ||
e3d6f909 AG |
53 | static u16 alua_lu_gps_counter; |
54 | static u32 alua_lu_gps_count; | |
55 | ||
56 | static DEFINE_SPINLOCK(lu_gps_lock); | |
57 | static LIST_HEAD(lu_gps_list); | |
58 | ||
59 | struct t10_alua_lu_gp *default_lu_gp; | |
60 | ||
c66094bf HR |
61 | /* |
62 | * REPORT REFERRALS | |
63 | * | |
64 | * See sbc3r35 section 5.23 | |
65 | */ | |
66 | sense_reason_t | |
67 | target_emulate_report_referrals(struct se_cmd *cmd) | |
68 | { | |
69 | struct se_device *dev = cmd->se_dev; | |
70 | struct t10_alua_lba_map *map; | |
71 | struct t10_alua_lba_map_member *map_mem; | |
72 | unsigned char *buf; | |
73 | u32 rd_len = 0, off; | |
74 | ||
75 | if (cmd->data_length < 4) { | |
76 | pr_warn("REPORT REFERRALS allocation length %u too" | |
77 | " small\n", cmd->data_length); | |
78 | return TCM_INVALID_CDB_FIELD; | |
79 | } | |
80 | ||
81 | buf = transport_kmap_data_sg(cmd); | |
82 | if (!buf) | |
83 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
84 | ||
85 | off = 4; | |
86 | spin_lock(&dev->t10_alua.lba_map_lock); | |
87 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
88 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
89 | transport_kunmap_data_sg(cmd); | |
90 | ||
91 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
92 | } | |
93 | ||
94 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
95 | lba_map_list) { | |
96 | int desc_num = off + 3; | |
97 | int pg_num; | |
98 | ||
99 | off += 4; | |
38edd724 HR |
100 | if (cmd->data_length > off) |
101 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 102 | off += 8; |
38edd724 HR |
103 | if (cmd->data_length > off) |
104 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
105 | off += 8; |
106 | rd_len += 20; | |
107 | pg_num = 0; | |
108 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
109 | lba_map_mem_list) { | |
38edd724 HR |
110 | int alua_state = map_mem->lba_map_mem_alua_state; |
111 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
112 | ||
113 | if (cmd->data_length > off) | |
114 | buf[off] = alua_state & 0x0f; | |
115 | off += 2; | |
116 | if (cmd->data_length > off) | |
117 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
118 | off++; | |
119 | if (cmd->data_length > off) | |
120 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 121 | off++; |
c66094bf HR |
122 | rd_len += 4; |
123 | pg_num++; | |
124 | } | |
38edd724 HR |
125 | if (cmd->data_length > desc_num) |
126 | buf[desc_num] = pg_num; | |
c66094bf HR |
127 | } |
128 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
129 | ||
130 | /* | |
131 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
132 | */ | |
133 | put_unaligned_be16(rd_len, &buf[2]); | |
134 | ||
135 | transport_kunmap_data_sg(cmd); | |
136 | ||
137 | target_complete_cmd(cmd, GOOD); | |
138 | return 0; | |
139 | } | |
140 | ||
c66ac9db NB |
141 | /* |
142 | * REPORT_TARGET_PORT_GROUPS | |
143 | * | |
144 | * See spc4r17 section 6.27 | |
145 | */ | |
de103c93 CH |
146 | sense_reason_t |
147 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 148 | { |
0fd97ccf | 149 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 150 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
adf653f9 | 151 | struct se_lun *lun; |
05d1c7c0 | 152 | unsigned char *buf; |
5b9a4d72 NB |
153 | u32 rd_len = 0, off; |
154 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 155 | |
6b20fa9a | 156 | /* |
5b9a4d72 NB |
157 | * Skip over RESERVED area to first Target port group descriptor |
158 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 159 | */ |
5b9a4d72 NB |
160 | if (ext_hdr != 0) |
161 | off = 8; | |
162 | else | |
163 | off = 4; | |
164 | ||
165 | if (cmd->data_length < off) { | |
166 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
167 | " small for %s header\n", cmd->data_length, | |
168 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 169 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 170 | } |
4949314c | 171 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
172 | if (!buf) |
173 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 174 | |
0fd97ccf CH |
175 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
176 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 177 | tg_pt_gp_list) { |
6b20fa9a NB |
178 | /* |
179 | * Check if the Target port group and Target port descriptor list | |
180 | * based on tg_pt_gp_members count will fit into the response payload. | |
181 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
182 | * the allocation length and the response is truncated. | |
183 | */ | |
184 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
185 | cmd->data_length) { | |
186 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
187 | continue; | |
188 | } | |
c66ac9db NB |
189 | /* |
190 | * PREF: Preferred target port bit, determine if this | |
191 | * bit should be set for port group. | |
192 | */ | |
193 | if (tg_pt_gp->tg_pt_gp_pref) | |
194 | buf[off] = 0x80; | |
195 | /* | |
196 | * Set the ASYMMETRIC ACCESS State | |
197 | */ | |
198 | buf[off++] |= (atomic_read( | |
199 | &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff); | |
200 | /* | |
201 | * Set supported ASYMMETRIC ACCESS State bits | |
202 | */ | |
c0dc941e | 203 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
204 | /* |
205 | * TARGET PORT GROUP | |
206 | */ | |
207 | buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff); | |
208 | buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff); | |
209 | ||
210 | off++; /* Skip over Reserved */ | |
211 | /* | |
212 | * STATUS CODE | |
213 | */ | |
214 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
215 | /* | |
216 | * Vendor Specific field | |
217 | */ | |
218 | buf[off++] = 0x00; | |
219 | /* | |
220 | * TARGET PORT COUNT | |
221 | */ | |
222 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
223 | rd_len += 8; | |
224 | ||
225 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
226 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
227 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
228 | /* |
229 | * Start Target Port descriptor format | |
230 | * | |
231 | * See spc4r17 section 6.2.7 Table 247 | |
232 | */ | |
233 | off += 2; /* Skip over Obsolete */ | |
234 | /* | |
235 | * Set RELATIVE TARGET PORT IDENTIFIER | |
236 | */ | |
adf653f9 CH |
237 | buf[off++] = ((lun->lun_rtpi >> 8) & 0xff); |
238 | buf[off++] = (lun->lun_rtpi & 0xff); | |
c66ac9db NB |
239 | rd_len += 4; |
240 | } | |
241 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
242 | } | |
0fd97ccf | 243 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
244 | /* |
245 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
246 | */ | |
5b9a4d72 | 247 | put_unaligned_be32(rd_len, &buf[0]); |
c66ac9db | 248 | |
5b9a4d72 NB |
249 | /* |
250 | * Fill in the Extended header parameter data format if requested | |
251 | */ | |
252 | if (ext_hdr != 0) { | |
253 | buf[4] = 0x10; | |
254 | /* | |
125d0119 | 255 | * Set the implicit transition time (in seconds) for the application |
5b9a4d72 NB |
256 | * client to use as a base for it's transition timeout value. |
257 | * | |
258 | * Use the current tg_pt_gp_mem -> tg_pt_gp membership from the LUN | |
259 | * this CDB was received upon to determine this value individually | |
260 | * for ALUA target port group. | |
261 | */ | |
adf653f9 CH |
262 | spin_lock(&cmd->se_lun->lun_tg_pt_gp_lock); |
263 | tg_pt_gp = cmd->se_lun->lun_tg_pt_gp; | |
264 | if (tg_pt_gp) | |
265 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; | |
266 | spin_unlock(&cmd->se_lun->lun_tg_pt_gp_lock); | |
5b9a4d72 | 267 | } |
4949314c | 268 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 269 | |
6bb35e00 | 270 | target_complete_cmd(cmd, GOOD); |
c66ac9db NB |
271 | return 0; |
272 | } | |
273 | ||
274 | /* | |
125d0119 | 275 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
276 | * |
277 | * See spc4r17 section 6.35 | |
278 | */ | |
de103c93 CH |
279 | sense_reason_t |
280 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 281 | { |
5951146d | 282 | struct se_device *dev = cmd->se_dev; |
adf653f9 | 283 | struct se_lun *l_lun = cmd->se_lun; |
e3d6f909 | 284 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; |
c66ac9db | 285 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
05d1c7c0 AG |
286 | unsigned char *buf; |
287 | unsigned char *ptr; | |
a0d50f62 | 288 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 289 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 290 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
291 | u16 tg_pt_id, rtpi; |
292 | ||
0d7f1299 PB |
293 | if (cmd->data_length < 4) { |
294 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
295 | " small\n", cmd->data_length); | |
de103c93 | 296 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
297 | } |
298 | ||
4949314c | 299 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
300 | if (!buf) |
301 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 302 | |
c66ac9db | 303 | /* |
125d0119 | 304 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
305 | * for the local tg_pt_gp. |
306 | */ | |
adf653f9 CH |
307 | spin_lock(&l_lun->lun_tg_pt_gp_lock); |
308 | l_tg_pt_gp = l_lun->lun_tg_pt_gp; | |
6708bb27 | 309 | if (!l_tg_pt_gp) { |
adf653f9 CH |
310 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
311 | pr_err("Unable to access l_lun->tg_pt_gp\n"); | |
de103c93 | 312 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 313 | goto out; |
c66ac9db | 314 | } |
c66ac9db | 315 | |
125d0119 | 316 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
adf653f9 | 317 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
6708bb27 | 318 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 319 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 320 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 321 | goto out; |
c66ac9db | 322 | } |
bb91c1a0 | 323 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
adf653f9 | 324 | spin_unlock(&l_lun->lun_tg_pt_gp_lock); |
c66ac9db | 325 | |
05d1c7c0 AG |
326 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
327 | ||
c66ac9db | 328 | while (len < cmd->data_length) { |
de103c93 | 329 | bool found = false; |
c66ac9db NB |
330 | alua_access_state = (ptr[0] & 0x0f); |
331 | /* | |
332 | * Check the received ALUA access state, and determine if | |
333 | * the state is a primary or secondary target port asymmetric | |
334 | * access state. | |
335 | */ | |
bb91c1a0 HR |
336 | rc = core_alua_check_transition(alua_access_state, |
337 | valid_states, &primary); | |
de103c93 | 338 | if (rc) { |
c66ac9db NB |
339 | /* |
340 | * If the SET TARGET PORT GROUPS attempts to establish | |
341 | * an invalid combination of target port asymmetric | |
342 | * access states or attempts to establish an | |
343 | * unsupported target port asymmetric access state, | |
344 | * then the command shall be terminated with CHECK | |
345 | * CONDITION status, with the sense key set to ILLEGAL | |
346 | * REQUEST, and the additional sense code set to INVALID | |
347 | * FIELD IN PARAMETER LIST. | |
348 | */ | |
05d1c7c0 | 349 | goto out; |
c66ac9db | 350 | } |
de103c93 | 351 | |
c66ac9db NB |
352 | /* |
353 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
354 | * specifies a primary target port asymmetric access state, | |
355 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
356 | * a primary target port group for which the primary target | |
357 | * port asymmetric access state shall be changed. If the | |
358 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
359 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
360 | * TARGET PORT field specifies the relative target port | |
361 | * identifier (see 3.1.120) of the target port for which the | |
362 | * secondary target port asymmetric access state shall be | |
363 | * changed. | |
364 | */ | |
365 | if (primary) { | |
33395fb8 | 366 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
367 | /* |
368 | * Locate the matching target port group ID from | |
369 | * the global tg_pt_gp list | |
370 | */ | |
0fd97ccf | 371 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 372 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 373 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 374 | tg_pt_gp_list) { |
6708bb27 | 375 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
376 | continue; |
377 | ||
378 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
379 | continue; | |
380 | ||
33940d09 | 381 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
de103c93 | 382 | |
0fd97ccf | 383 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 384 | |
de103c93 | 385 | if (!core_alua_do_port_transition(tg_pt_gp, |
adf653f9 | 386 | dev, l_lun, nacl, |
de103c93 CH |
387 | alua_access_state, 1)) |
388 | found = true; | |
c66ac9db | 389 | |
0fd97ccf | 390 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 391 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
c66ac9db NB |
392 | break; |
393 | } | |
0fd97ccf | 394 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 395 | } else { |
adf653f9 CH |
396 | struct se_lun *lun; |
397 | ||
c66ac9db | 398 | /* |
f1ae05d5 | 399 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
400 | * the Target Port in question for the the incoming |
401 | * SET_TARGET_PORT_GROUPS op. | |
402 | */ | |
33395fb8 | 403 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 404 | /* |
35d1efe8 | 405 | * Locate the matching relative target port identifier |
c66ac9db NB |
406 | * for the struct se_device storage object. |
407 | */ | |
408 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
409 | list_for_each_entry(lun, &dev->dev_sep_list, |
410 | lun_dev_link) { | |
411 | if (lun->lun_rtpi != rtpi) | |
c66ac9db NB |
412 | continue; |
413 | ||
adf653f9 | 414 | // XXX: racy unlock |
c66ac9db NB |
415 | spin_unlock(&dev->se_port_lock); |
416 | ||
de103c93 | 417 | if (!core_alua_set_tg_pt_secondary_state( |
adf653f9 | 418 | lun, 1, 1)) |
de103c93 | 419 | found = true; |
c66ac9db NB |
420 | |
421 | spin_lock(&dev->se_port_lock); | |
422 | break; | |
423 | } | |
424 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
425 | } |
426 | ||
427 | if (!found) { | |
428 | rc = TCM_INVALID_PARAMETER_LIST; | |
429 | goto out; | |
c66ac9db NB |
430 | } |
431 | ||
432 | ptr += 4; | |
433 | len += 4; | |
434 | } | |
435 | ||
05d1c7c0 | 436 | out: |
4949314c | 437 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
438 | if (!rc) |
439 | target_complete_cmd(cmd, GOOD); | |
440 | return rc; | |
c66ac9db NB |
441 | } |
442 | ||
1e3ab99d PB |
443 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
444 | { | |
445 | /* | |
446 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
447 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
448 | * by the ALUA primary or secondary access state.. | |
449 | */ | |
450 | pr_debug("[%s]: ALUA TG Port not available, " | |
451 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
452 | "0x04/0x%02x\n", | |
453 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
454 | ||
455 | cmd->scsi_asc = 0x04; | |
456 | cmd->scsi_ascq = alua_ascq; | |
457 | } | |
458 | ||
459 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
460 | struct se_cmd *cmd, |
461 | unsigned char *cdb, | |
1e3ab99d | 462 | int nonop_delay_msecs) |
c66ac9db NB |
463 | { |
464 | /* | |
465 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
466 | * later to determine if processing of this cmd needs to be | |
467 | * temporarily delayed for the Active/NonOptimized primary access state. | |
468 | */ | |
469 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
470 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
471 | } |
472 | ||
c66094bf HR |
473 | static inline int core_alua_state_lba_dependent( |
474 | struct se_cmd *cmd, | |
1e3ab99d | 475 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
476 | { |
477 | struct se_device *dev = cmd->se_dev; | |
478 | u64 segment_size, segment_mult, sectors, lba; | |
479 | ||
480 | /* Only need to check for cdb actually containing LBAs */ | |
481 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
482 | return 0; | |
483 | ||
484 | spin_lock(&dev->t10_alua.lba_map_lock); | |
485 | segment_size = dev->t10_alua.lba_map_segment_size; | |
486 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
487 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
488 | ||
489 | lba = cmd->t_task_lba; | |
490 | while (lba < cmd->t_task_lba + sectors) { | |
491 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
492 | struct t10_alua_lba_map_member *map_mem; | |
493 | ||
494 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
495 | lba_map_list) { | |
496 | u64 start_lba, last_lba; | |
497 | u64 first_lba = map->lba_map_first_lba; | |
498 | ||
499 | if (segment_mult) { | |
500 | u64 tmp = lba; | |
cdf55949 | 501 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
502 | |
503 | last_lba = first_lba + segment_size - 1; | |
504 | if (start_lba >= first_lba && | |
505 | start_lba <= last_lba) { | |
506 | lba += segment_size; | |
507 | cur_map = map; | |
508 | break; | |
509 | } | |
510 | } else { | |
511 | last_lba = map->lba_map_last_lba; | |
512 | if (lba >= first_lba && lba <= last_lba) { | |
513 | lba = last_lba + 1; | |
514 | cur_map = map; | |
515 | break; | |
516 | } | |
517 | } | |
518 | } | |
519 | if (!cur_map) { | |
520 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 521 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
522 | return 1; |
523 | } | |
524 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
525 | lba_map_mem_list) { | |
526 | if (map_mem->lba_map_mem_alua_pg_id != | |
527 | tg_pt_gp->tg_pt_gp_id) | |
528 | continue; | |
529 | switch(map_mem->lba_map_mem_alua_state) { | |
530 | case ALUA_ACCESS_STATE_STANDBY: | |
531 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 532 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
533 | return 1; |
534 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
535 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 536 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
537 | return 1; |
538 | default: | |
539 | break; | |
540 | } | |
541 | } | |
542 | } | |
543 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
544 | return 0; | |
545 | } | |
546 | ||
c66ac9db NB |
547 | static inline int core_alua_state_standby( |
548 | struct se_cmd *cmd, | |
1e3ab99d | 549 | unsigned char *cdb) |
c66ac9db NB |
550 | { |
551 | /* | |
552 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
553 | * spc4r17 section 5.9.2.4.4 | |
554 | */ | |
555 | switch (cdb[0]) { | |
556 | case INQUIRY: | |
557 | case LOG_SELECT: | |
558 | case LOG_SENSE: | |
559 | case MODE_SELECT: | |
560 | case MODE_SENSE: | |
561 | case REPORT_LUNS: | |
562 | case RECEIVE_DIAGNOSTIC: | |
563 | case SEND_DIAGNOSTIC: | |
e7810c2d | 564 | case READ_CAPACITY: |
30f359a6 | 565 | return 0; |
eb846d9f | 566 | case SERVICE_ACTION_IN_16: |
e7810c2d NB |
567 | switch (cdb[1] & 0x1f) { |
568 | case SAI_READ_CAPACITY_16: | |
569 | return 0; | |
570 | default: | |
571 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); | |
572 | return 1; | |
573 | } | |
c66ac9db | 574 | case MAINTENANCE_IN: |
ba539743 | 575 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
576 | case MI_REPORT_TARGET_PGS: |
577 | return 0; | |
578 | default: | |
1e3ab99d | 579 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
580 | return 1; |
581 | } | |
582 | case MAINTENANCE_OUT: | |
583 | switch (cdb[1]) { | |
584 | case MO_SET_TARGET_PGS: | |
585 | return 0; | |
586 | default: | |
1e3ab99d | 587 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
588 | return 1; |
589 | } | |
590 | case REQUEST_SENSE: | |
591 | case PERSISTENT_RESERVE_IN: | |
592 | case PERSISTENT_RESERVE_OUT: | |
593 | case READ_BUFFER: | |
594 | case WRITE_BUFFER: | |
595 | return 0; | |
596 | default: | |
1e3ab99d | 597 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
598 | return 1; |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | static inline int core_alua_state_unavailable( | |
605 | struct se_cmd *cmd, | |
1e3ab99d | 606 | unsigned char *cdb) |
c66ac9db NB |
607 | { |
608 | /* | |
609 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
610 | * spc4r17 section 5.9.2.4.5 | |
611 | */ | |
612 | switch (cdb[0]) { | |
613 | case INQUIRY: | |
614 | case REPORT_LUNS: | |
30f359a6 | 615 | return 0; |
c66ac9db | 616 | case MAINTENANCE_IN: |
ba539743 | 617 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
618 | case MI_REPORT_TARGET_PGS: |
619 | return 0; | |
620 | default: | |
1e3ab99d | 621 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
622 | return 1; |
623 | } | |
624 | case MAINTENANCE_OUT: | |
625 | switch (cdb[1]) { | |
626 | case MO_SET_TARGET_PGS: | |
627 | return 0; | |
628 | default: | |
1e3ab99d | 629 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
630 | return 1; |
631 | } | |
632 | case REQUEST_SENSE: | |
633 | case READ_BUFFER: | |
634 | case WRITE_BUFFER: | |
635 | return 0; | |
636 | default: | |
1e3ab99d | 637 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
638 | return 1; |
639 | } | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | static inline int core_alua_state_transition( | |
645 | struct se_cmd *cmd, | |
1e3ab99d | 646 | unsigned char *cdb) |
c66ac9db NB |
647 | { |
648 | /* | |
f1ae05d5 | 649 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
650 | * spc4r17 section 5.9.2.5 |
651 | */ | |
652 | switch (cdb[0]) { | |
653 | case INQUIRY: | |
654 | case REPORT_LUNS: | |
30f359a6 | 655 | return 0; |
c66ac9db | 656 | case MAINTENANCE_IN: |
ba539743 | 657 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
658 | case MI_REPORT_TARGET_PGS: |
659 | return 0; | |
660 | default: | |
1e3ab99d | 661 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
662 | return 1; |
663 | } | |
664 | case REQUEST_SENSE: | |
665 | case READ_BUFFER: | |
666 | case WRITE_BUFFER: | |
667 | return 0; | |
668 | default: | |
1e3ab99d | 669 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
670 | return 1; |
671 | } | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | /* | |
f1ae05d5 | 677 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 678 | * return 0: Used to signal success |
f1ae05d5 | 679 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 680 | */ |
de103c93 CH |
681 | sense_reason_t |
682 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 683 | { |
c87fbd56 CH |
684 | struct se_device *dev = cmd->se_dev; |
685 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 686 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 687 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db | 688 | int out_alua_state, nonop_delay_msecs; |
c87fbd56 CH |
689 | |
690 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
691 | return 0; | |
a3541703 | 692 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
c87fbd56 | 693 | return 0; |
c66ac9db | 694 | |
c66ac9db NB |
695 | /* |
696 | * First, check for a struct se_port specific secondary ALUA target port | |
697 | * access state: OFFLINE | |
698 | */ | |
adf653f9 | 699 | if (atomic_read(&lun->lun_tg_pt_secondary_offline)) { |
6708bb27 | 700 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 701 | " target port\n"); |
1e3ab99d PB |
702 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
703 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db | 704 | } |
adf653f9 CH |
705 | |
706 | if (!lun->lun_tg_pt_gp) | |
89c12cc9 NB |
707 | return 0; |
708 | ||
adf653f9 CH |
709 | spin_lock(&lun->lun_tg_pt_gp_lock); |
710 | tg_pt_gp = lun->lun_tg_pt_gp; | |
c66ac9db NB |
711 | out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); |
712 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; | |
adf653f9 CH |
713 | |
714 | // XXX: keeps using tg_pt_gp witout reference after unlock | |
715 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db | 716 | /* |
73f3bf51 | 717 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 718 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
719 | * For the Optimized ALUA access state case, we want to process the |
720 | * incoming fabric cmd ASAP.. | |
721 | */ | |
73f3bf51 | 722 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
723 | return 0; |
724 | ||
725 | switch (out_alua_state) { | |
726 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 727 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 728 | break; |
c66ac9db | 729 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
730 | if (core_alua_state_standby(cmd, cdb)) |
731 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 732 | break; |
c66ac9db | 733 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
734 | if (core_alua_state_unavailable(cmd, cdb)) |
735 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 736 | break; |
c66ac9db | 737 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
738 | if (core_alua_state_transition(cmd, cdb)) |
739 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 740 | break; |
c66094bf | 741 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
742 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
743 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 744 | break; |
c66ac9db NB |
745 | /* |
746 | * OFFLINE is a secondary ALUA target port group access state, that is | |
adf653f9 | 747 | * handled above with struct se_lun->lun_tg_pt_secondary_offline=1 |
c66ac9db NB |
748 | */ |
749 | case ALUA_ACCESS_STATE_OFFLINE: | |
750 | default: | |
6708bb27 | 751 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 752 | out_alua_state); |
de103c93 | 753 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
754 | } |
755 | ||
de103c93 | 756 | return 0; |
c66ac9db NB |
757 | } |
758 | ||
759 | /* | |
125d0119 | 760 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 761 | */ |
de103c93 | 762 | static sense_reason_t |
bb91c1a0 | 763 | core_alua_check_transition(int state, int valid, int *primary) |
c66ac9db | 764 | { |
bb91c1a0 HR |
765 | /* |
766 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
767 | * defined as primary target port asymmetric access states. | |
768 | */ | |
c66ac9db | 769 | switch (state) { |
73f3bf51 | 770 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
771 | if (!(valid & ALUA_AO_SUP)) |
772 | goto not_supported; | |
773 | *primary = 1; | |
774 | break; | |
c66ac9db | 775 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
776 | if (!(valid & ALUA_AN_SUP)) |
777 | goto not_supported; | |
778 | *primary = 1; | |
779 | break; | |
c66ac9db | 780 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
781 | if (!(valid & ALUA_S_SUP)) |
782 | goto not_supported; | |
783 | *primary = 1; | |
784 | break; | |
c66ac9db | 785 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
786 | if (!(valid & ALUA_U_SUP)) |
787 | goto not_supported; | |
c66ac9db NB |
788 | *primary = 1; |
789 | break; | |
c66094bf HR |
790 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
791 | if (!(valid & ALUA_LBD_SUP)) | |
792 | goto not_supported; | |
793 | *primary = 1; | |
794 | break; | |
c66ac9db NB |
795 | case ALUA_ACCESS_STATE_OFFLINE: |
796 | /* | |
797 | * OFFLINE state is defined as a secondary target port | |
798 | * asymmetric access state. | |
799 | */ | |
bb91c1a0 HR |
800 | if (!(valid & ALUA_O_SUP)) |
801 | goto not_supported; | |
c66ac9db NB |
802 | *primary = 0; |
803 | break; | |
bb91c1a0 HR |
804 | case ALUA_ACCESS_STATE_TRANSITION: |
805 | /* | |
806 | * Transitioning is set internally, and | |
807 | * cannot be selected manually. | |
808 | */ | |
809 | goto not_supported; | |
c66ac9db | 810 | default: |
6708bb27 | 811 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 812 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
813 | } |
814 | ||
815 | return 0; | |
bb91c1a0 HR |
816 | |
817 | not_supported: | |
818 | pr_err("ALUA access state %s not supported", | |
819 | core_alua_dump_state(state)); | |
820 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
821 | } |
822 | ||
823 | static char *core_alua_dump_state(int state) | |
824 | { | |
825 | switch (state) { | |
73f3bf51 | 826 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
827 | return "Active/Optimized"; |
828 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
829 | return "Active/NonOptimized"; | |
c66094bf HR |
830 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
831 | return "LBA Dependent"; | |
c66ac9db NB |
832 | case ALUA_ACCESS_STATE_STANDBY: |
833 | return "Standby"; | |
834 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
835 | return "Unavailable"; | |
836 | case ALUA_ACCESS_STATE_OFFLINE: | |
837 | return "Offline"; | |
bb91c1a0 HR |
838 | case ALUA_ACCESS_STATE_TRANSITION: |
839 | return "Transitioning"; | |
c66ac9db NB |
840 | default: |
841 | return "Unknown"; | |
842 | } | |
843 | ||
844 | return NULL; | |
845 | } | |
846 | ||
847 | char *core_alua_dump_status(int status) | |
848 | { | |
849 | switch (status) { | |
850 | case ALUA_STATUS_NONE: | |
851 | return "None"; | |
125d0119 HR |
852 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
853 | return "Altered by Explicit STPG"; | |
854 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
855 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
856 | default: |
857 | return "Unknown"; | |
858 | } | |
859 | ||
860 | return NULL; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Used by fabric modules to determine when we need to delay processing | |
865 | * for the Active/NonOptimized paths.. | |
866 | */ | |
867 | int core_alua_check_nonop_delay( | |
868 | struct se_cmd *cmd) | |
869 | { | |
870 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
871 | return 0; | |
872 | if (in_interrupt()) | |
873 | return 0; | |
874 | /* | |
875 | * The ALUA Active/NonOptimized access state delay can be disabled | |
876 | * in via configfs with a value of zero | |
877 | */ | |
6708bb27 | 878 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
879 | return 0; |
880 | /* | |
881 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
882 | * defined interval in core_alua_state_nonoptimized() | |
883 | */ | |
884 | msleep_interruptible(cmd->alua_nonop_delay); | |
885 | return 0; | |
886 | } | |
887 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
888 | ||
c66ac9db NB |
889 | static int core_alua_write_tpg_metadata( |
890 | const char *path, | |
891 | unsigned char *md_buf, | |
892 | u32 md_buf_len) | |
893 | { | |
0e9b10a9 AV |
894 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
895 | int ret; | |
c66ac9db | 896 | |
0e9b10a9 AV |
897 | if (IS_ERR(file)) { |
898 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
899 | return -ENODEV; |
900 | } | |
0e9b10a9 AV |
901 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
902 | if (ret < 0) | |
6708bb27 | 903 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 904 | fput(file); |
f730f915 | 905 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
906 | } |
907 | ||
908 | /* | |
909 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held | |
910 | */ | |
911 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 912 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 913 | { |
1e0b9403 | 914 | unsigned char *md_buf; |
0fd97ccf | 915 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
c66ac9db | 916 | char path[ALUA_METADATA_PATH_LEN]; |
1e0b9403 HR |
917 | int len, rc; |
918 | ||
919 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
920 | if (!md_buf) { | |
921 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
922 | return -ENOMEM; | |
923 | } | |
c66ac9db NB |
924 | |
925 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
926 | ||
1e0b9403 | 927 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
928 | "tg_pt_gp_id=%hu\n" |
929 | "alua_access_state=0x%02x\n" | |
930 | "alua_access_status=0x%02x\n", | |
9c6e164c HR |
931 | tg_pt_gp->tg_pt_gp_id, |
932 | tg_pt_gp->tg_pt_gp_alua_pending_state, | |
c66ac9db NB |
933 | tg_pt_gp->tg_pt_gp_alua_access_status); |
934 | ||
935 | snprintf(path, ALUA_METADATA_PATH_LEN, | |
936 | "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0], | |
937 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); | |
938 | ||
1e0b9403 HR |
939 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
940 | kfree(md_buf); | |
941 | return rc; | |
c66ac9db NB |
942 | } |
943 | ||
9c6e164c | 944 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) |
c66ac9db | 945 | { |
9c6e164c HR |
946 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, |
947 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work); | |
948 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
c66ac9db | 949 | struct se_dev_entry *se_deve; |
adf653f9 | 950 | struct se_lun *lun; |
c66ac9db | 951 | struct se_lun_acl *lacl; |
9c6e164c HR |
952 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == |
953 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
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 | ||
adf653f9 CH |
976 | spin_lock_bh(&lun->lun_deve_lock); |
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)); |
c66ac9db NB |
980 | /* |
981 | * se_deve->se_lun_acl pointer may be NULL for a | |
125d0119 | 982 | * entry created without explicit Node+MappedLUN ACLs |
c66ac9db | 983 | */ |
6708bb27 | 984 | if (!lacl) |
c66ac9db NB |
985 | continue; |
986 | ||
9c6e164c HR |
987 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
988 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
989 | (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
990 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl) && | |
adf653f9 CH |
991 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
992 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
993 | continue; |
994 | ||
995 | core_scsi3_ua_allocate(lacl->se_lun_nacl, | |
996 | se_deve->mapped_lun, 0x2A, | |
997 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); | |
998 | } | |
adf653f9 | 999 | spin_unlock_bh(&lun->lun_deve_lock); |
c66ac9db NB |
1000 | |
1001 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 1002 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
1003 | } |
1004 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1005 | /* | |
1006 | * Update the ALUA metadata buf that has been allocated in | |
1007 | * core_alua_do_port_transition(), this metadata will be written | |
1008 | * to struct file. | |
1009 | * | |
1010 | * Note that there is the case where we do not want to update the | |
1011 | * metadata when the saved metadata is being parsed in userspace | |
1012 | * when setting the existing port access state and access status. | |
1013 | * | |
1014 | * Also note that the failure to write out the ALUA metadata to | |
1015 | * struct file does NOT affect the actual ALUA transition. | |
1016 | */ | |
1017 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1018 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1019 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1020 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1021 | } | |
1022 | /* | |
1023 | * Set the current primary ALUA access state to the requested new state | |
1024 | */ | |
dfbce75a HR |
1025 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1026 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1027 | |
6708bb27 | 1028 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1029 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1030 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1031 | tg_pt_gp->tg_pt_gp_id, |
1032 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1033 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
9c6e164c HR |
1034 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1035 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1036 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1037 | ||
1038 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1039 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1040 | } | |
1041 | ||
1042 | static int core_alua_do_transition_tg_pt( | |
1043 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1044 | int new_state, | |
1045 | int explicit) | |
1046 | { | |
1047 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1048 | DECLARE_COMPLETION_ONSTACK(wait); | |
1049 | ||
1050 | /* Nothing to be done here */ | |
1051 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1052 | return 0; | |
1053 | ||
1054 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) | |
1055 | return -EAGAIN; | |
1056 | ||
1057 | /* | |
1058 | * Flush any pending transitions | |
1059 | */ | |
1060 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs && | |
1061 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == | |
1062 | ALUA_ACCESS_STATE_TRANSITION) { | |
1063 | /* Just in case */ | |
1064 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1065 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1066 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); | |
1067 | wait_for_completion(&wait); | |
1068 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Save the old primary ALUA access state, and set the current state | |
1074 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1075 | */ | |
1076 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1077 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1078 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1079 | ||
1080 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, | |
1081 | ALUA_ACCESS_STATE_TRANSITION); | |
1082 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1083 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1084 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1085 | ||
1086 | /* | |
1087 | * Check for the optional ALUA primary state transition delay | |
1088 | */ | |
1089 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1090 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1091 | ||
1092 | /* | |
1093 | * Take a reference for workqueue item | |
1094 | */ | |
1095 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1096 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1097 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1098 | ||
1099 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) { | |
1100 | unsigned long transition_tmo; | |
1101 | ||
1102 | transition_tmo = tg_pt_gp->tg_pt_gp_implicit_trans_secs * HZ; | |
1103 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1104 | &tg_pt_gp->tg_pt_gp_transition_work, | |
1105 | transition_tmo); | |
1106 | } else { | |
1107 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1108 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1109 | &tg_pt_gp->tg_pt_gp_transition_work, 0); | |
1110 | wait_for_completion(&wait); | |
1111 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1112 | } | |
c66ac9db NB |
1113 | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | int core_alua_do_port_transition( | |
1118 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1119 | struct se_device *l_dev, | |
adf653f9 | 1120 | struct se_lun *l_lun, |
c66ac9db NB |
1121 | struct se_node_acl *l_nacl, |
1122 | int new_state, | |
125d0119 | 1123 | int explicit) |
c66ac9db NB |
1124 | { |
1125 | struct se_device *dev; | |
c66ac9db NB |
1126 | struct t10_alua_lu_gp *lu_gp; |
1127 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1128 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1129 | int primary, valid_states, rc = 0; |
c66ac9db | 1130 | |
bb91c1a0 HR |
1131 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1132 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) | |
c66ac9db NB |
1133 | return -EINVAL; |
1134 | ||
c66ac9db NB |
1135 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1136 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1137 | lu_gp = local_lu_gp_mem->lu_gp; | |
1138 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1139 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1140 | /* | |
1141 | * For storage objects that are members of the 'default_lu_gp', | |
1142 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1143 | * on all of the matching target port groups IDs in default_lu_gp. | |
1144 | */ | |
6708bb27 | 1145 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1146 | /* |
1147 | * core_alua_do_transition_tg_pt() will always return | |
1148 | * success. | |
1149 | */ | |
adf653f9 | 1150 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1151 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1152 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1153 | new_state, explicit); | |
33940d09 | 1154 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1155 | return rc; |
c66ac9db NB |
1156 | } |
1157 | /* | |
1158 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1159 | * the associated storage objects looking for a matching target port | |
1160 | * group ID from the local target port group. | |
1161 | */ | |
1162 | spin_lock(&lu_gp->lu_gp_lock); | |
1163 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1164 | lu_gp_mem_list) { | |
1165 | ||
1166 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1167 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1168 | spin_unlock(&lu_gp->lu_gp_lock); |
1169 | ||
0fd97ccf | 1170 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1171 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1172 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1173 | tg_pt_gp_list) { |
1174 | ||
6708bb27 | 1175 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1176 | continue; |
1177 | /* | |
1178 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1179 | * is changed for any target port group accessible via |
c66ac9db NB |
1180 | * a logical unit within a LU group, the target port |
1181 | * behavior group asymmetric access states for the same | |
1182 | * target port group accessible via other logical units | |
1183 | * in that LU group will also change. | |
1184 | */ | |
1185 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1186 | continue; | |
1187 | ||
1188 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1189 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1190 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1191 | } else { |
adf653f9 | 1192 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1193 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1194 | } |
33940d09 | 1195 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1196 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1197 | /* |
1198 | * core_alua_do_transition_tg_pt() will always return | |
1199 | * success. | |
1200 | */ | |
9c6e164c HR |
1201 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1202 | new_state, explicit); | |
c66ac9db | 1203 | |
0fd97ccf | 1204 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1205 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1206 | if (rc) |
1207 | break; | |
c66ac9db | 1208 | } |
0fd97ccf | 1209 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1210 | |
1211 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1212 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1213 | } |
1214 | spin_unlock(&lu_gp->lu_gp_lock); | |
1215 | ||
9c6e164c HR |
1216 | if (!rc) { |
1217 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1218 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1219 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1220 | l_tg_pt_gp->tg_pt_gp_id, | |
1221 | (explicit) ? "explicit" : "implicit", | |
1222 | core_alua_dump_state(new_state)); | |
1223 | } | |
c66ac9db | 1224 | |
33940d09 | 1225 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1226 | return rc; |
c66ac9db NB |
1227 | } |
1228 | ||
adf653f9 | 1229 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1230 | { |
adf653f9 | 1231 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1232 | unsigned char *md_buf; |
c66ac9db | 1233 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; |
1e0b9403 HR |
1234 | int len, rc; |
1235 | ||
adf653f9 CH |
1236 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1237 | ||
1e0b9403 HR |
1238 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1239 | if (!md_buf) { | |
1240 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1241 | rc = -ENOMEM; |
1242 | goto out_unlock; | |
1e0b9403 | 1243 | } |
c66ac9db NB |
1244 | |
1245 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1246 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1247 | ||
1248 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1249 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1250 | |
e3d6f909 | 1251 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1252 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1253 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1254 | |
1e0b9403 | 1255 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1256 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1257 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1258 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1259 | |
f2d30680 | 1260 | snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%llu", |
e3d6f909 | 1261 | se_tpg->se_tpg_tfo->get_fabric_name(), wwn, |
adf653f9 | 1262 | lun->unpacked_lun); |
c66ac9db | 1263 | |
1e0b9403 HR |
1264 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1265 | kfree(md_buf); | |
1266 | ||
adf653f9 CH |
1267 | out_unlock: |
1268 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1269 | return rc; |
c66ac9db NB |
1270 | } |
1271 | ||
1272 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1273 | struct se_lun *lun, |
125d0119 | 1274 | int explicit, |
c66ac9db NB |
1275 | int offline) |
1276 | { | |
1277 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1278 | int trans_delay_msecs; |
1279 | ||
adf653f9 CH |
1280 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1281 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1282 | if (!tg_pt_gp) { |
adf653f9 | 1283 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1284 | pr_err("Unable to complete secondary state" |
c66ac9db | 1285 | " transition\n"); |
e3d6f909 | 1286 | return -EINVAL; |
c66ac9db NB |
1287 | } |
1288 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1289 | /* | |
1290 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1291 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1292 | */ |
1293 | if (offline) | |
adf653f9 | 1294 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1295 | else |
adf653f9 | 1296 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1297 | |
adf653f9 | 1298 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1299 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1300 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1301 | |
6708bb27 | 1302 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1303 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1304 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1305 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1306 | ||
adf653f9 | 1307 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1308 | /* |
1309 | * Do the optional transition delay after we set the secondary | |
1310 | * ALUA access state. | |
1311 | */ | |
1312 | if (trans_delay_msecs != 0) | |
1313 | msleep_interruptible(trans_delay_msecs); | |
1314 | /* | |
1315 | * See if we need to update the ALUA fabric port metadata for | |
1316 | * secondary state and status | |
1317 | */ | |
adf653f9 CH |
1318 | if (lun->lun_tg_pt_secondary_write_md) |
1319 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1320 | |
1321 | return 0; | |
1322 | } | |
1323 | ||
229d4f11 HR |
1324 | struct t10_alua_lba_map * |
1325 | core_alua_allocate_lba_map(struct list_head *list, | |
1326 | u64 first_lba, u64 last_lba) | |
1327 | { | |
1328 | struct t10_alua_lba_map *lba_map; | |
1329 | ||
1330 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1331 | if (!lba_map) { | |
1332 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1333 | return ERR_PTR(-ENOMEM); | |
1334 | } | |
1335 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1336 | lba_map->lba_map_first_lba = first_lba; | |
1337 | lba_map->lba_map_last_lba = last_lba; | |
1338 | ||
1339 | list_add_tail(&lba_map->lba_map_list, list); | |
1340 | return lba_map; | |
1341 | } | |
1342 | ||
1343 | int | |
1344 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1345 | int pg_id, int state) | |
1346 | { | |
1347 | struct t10_alua_lba_map_member *lba_map_mem; | |
1348 | ||
1349 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1350 | lba_map_mem_list) { | |
1351 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1352 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1353 | return -EINVAL; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1358 | if (!lba_map_mem) { | |
1359 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1360 | return -ENOMEM; | |
1361 | } | |
1362 | lba_map_mem->lba_map_mem_alua_state = state; | |
1363 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1364 | ||
1365 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1366 | &lba_map->lba_map_mem_list); | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | void | |
1371 | core_alua_free_lba_map(struct list_head *lba_list) | |
1372 | { | |
1373 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1374 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1375 | ||
1376 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1377 | lba_map_list) { | |
1378 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1379 | &lba_map->lba_map_mem_list, | |
1380 | lba_map_mem_list) { | |
1381 | list_del(&lba_map_mem->lba_map_mem_list); | |
1382 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1383 | lba_map_mem); | |
1384 | } | |
1385 | list_del(&lba_map->lba_map_list); | |
1386 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | void | |
1391 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1392 | int segment_size, int segment_mult) | |
1393 | { | |
1394 | struct list_head old_lba_map_list; | |
1395 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1396 | int activate = 0, supported; | |
1397 | ||
1398 | INIT_LIST_HEAD(&old_lba_map_list); | |
1399 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1400 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1401 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1402 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1403 | if (lba_map_list) { | |
1404 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1405 | activate = 1; | |
1406 | } | |
1407 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1408 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1409 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1410 | tg_pt_gp_list) { | |
1411 | ||
1412 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1413 | continue; | |
1414 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1415 | if (activate) | |
1416 | supported |= ALUA_LBD_SUP; | |
1417 | else | |
1418 | supported &= ~ALUA_LBD_SUP; | |
1419 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1420 | } | |
1421 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1422 | core_alua_free_lba_map(&old_lba_map_list); | |
1423 | } | |
1424 | ||
c66ac9db NB |
1425 | struct t10_alua_lu_gp * |
1426 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1427 | { | |
1428 | struct t10_alua_lu_gp *lu_gp; | |
1429 | ||
1430 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1431 | if (!lu_gp) { |
1432 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1433 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1434 | } |
e3d6f909 | 1435 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1436 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1437 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1438 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1439 | ||
1440 | if (def_group) { | |
e3d6f909 | 1441 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1442 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1443 | alua_lu_gps_count++; |
c66ac9db NB |
1444 | } |
1445 | ||
1446 | return lu_gp; | |
1447 | } | |
1448 | ||
1449 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1450 | { | |
1451 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1452 | u16 lu_gp_id_tmp; | |
1453 | /* | |
1454 | * The lu_gp->lu_gp_id may only be set once.. | |
1455 | */ | |
1456 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1457 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1458 | " ignoring request\n"); |
e3d6f909 | 1459 | return -EINVAL; |
c66ac9db NB |
1460 | } |
1461 | ||
e3d6f909 AG |
1462 | spin_lock(&lu_gps_lock); |
1463 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1464 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1465 | " 0x0000ffff reached\n"); |
e3d6f909 | 1466 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1467 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1468 | return -ENOSPC; |
c66ac9db NB |
1469 | } |
1470 | again: | |
1471 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1472 | alua_lu_gps_counter++; |
c66ac9db | 1473 | |
e3d6f909 | 1474 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1475 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1476 | if (!lu_gp_id) |
c66ac9db NB |
1477 | goto again; |
1478 | ||
6708bb27 | 1479 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1480 | " already exists, ignoring request\n", |
1481 | lu_gp_id); | |
e3d6f909 AG |
1482 | spin_unlock(&lu_gps_lock); |
1483 | return -EINVAL; | |
c66ac9db NB |
1484 | } |
1485 | } | |
1486 | ||
1487 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1488 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1489 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1490 | alua_lu_gps_count++; | |
1491 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1492 | |
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | static struct t10_alua_lu_gp_member * | |
1497 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1498 | { | |
1499 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1500 | ||
1501 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1502 | if (!lu_gp_mem) { |
1503 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1504 | return ERR_PTR(-ENOMEM); |
1505 | } | |
1506 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1507 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1508 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1509 | ||
1510 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1511 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1512 | ||
1513 | return lu_gp_mem; | |
1514 | } | |
1515 | ||
1516 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1517 | { | |
1518 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1519 | /* | |
1520 | * Once we have reached this point, config_item_put() has | |
1521 | * already been called from target_core_alua_drop_lu_gp(). | |
1522 | * | |
1523 | * Here, we remove the *lu_gp from the global list so that | |
1524 | * no associations can be made while we are releasing | |
1525 | * struct t10_alua_lu_gp. | |
1526 | */ | |
e3d6f909 | 1527 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1528 | list_del(&lu_gp->lu_gp_node); |
1529 | alua_lu_gps_count--; | |
1530 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1531 | /* |
1532 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1533 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1534 | * released with core_alua_put_lu_gp_from_name() | |
1535 | */ | |
1536 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1537 | cpu_relax(); | |
1538 | /* | |
1539 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1540 | * struct se_device. | |
1541 | */ | |
1542 | spin_lock(&lu_gp->lu_gp_lock); | |
1543 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1544 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1545 | if (lu_gp_mem->lu_gp_assoc) { | |
1546 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1547 | lu_gp->lu_gp_members--; | |
1548 | lu_gp_mem->lu_gp_assoc = 0; | |
1549 | } | |
1550 | spin_unlock(&lu_gp->lu_gp_lock); | |
1551 | /* | |
1552 | * | |
25985edc | 1553 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1554 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1555 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1556 | * | |
1557 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1558 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1559 | */ |
1560 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1561 | if (lu_gp != default_lu_gp) |
c66ac9db | 1562 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1563 | default_lu_gp); |
c66ac9db NB |
1564 | else |
1565 | lu_gp_mem->lu_gp = NULL; | |
1566 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1567 | ||
1568 | spin_lock(&lu_gp->lu_gp_lock); | |
1569 | } | |
1570 | spin_unlock(&lu_gp->lu_gp_lock); | |
1571 | ||
1572 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1573 | } | |
1574 | ||
1575 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1576 | { | |
c66ac9db NB |
1577 | struct t10_alua_lu_gp *lu_gp; |
1578 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1579 | ||
c66ac9db | 1580 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1581 | if (!lu_gp_mem) |
c66ac9db NB |
1582 | return; |
1583 | ||
1584 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1585 | cpu_relax(); | |
1586 | ||
1587 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1588 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1589 | if (lu_gp) { |
c66ac9db NB |
1590 | spin_lock(&lu_gp->lu_gp_lock); |
1591 | if (lu_gp_mem->lu_gp_assoc) { | |
1592 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1593 | lu_gp->lu_gp_members--; | |
1594 | lu_gp_mem->lu_gp_assoc = 0; | |
1595 | } | |
1596 | spin_unlock(&lu_gp->lu_gp_lock); | |
1597 | lu_gp_mem->lu_gp = NULL; | |
1598 | } | |
1599 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1600 | ||
1601 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1602 | } | |
1603 | ||
1604 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1605 | { | |
1606 | struct t10_alua_lu_gp *lu_gp; | |
1607 | struct config_item *ci; | |
1608 | ||
e3d6f909 AG |
1609 | spin_lock(&lu_gps_lock); |
1610 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1611 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1612 | continue; |
1613 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1614 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1615 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1616 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1617 | return lu_gp; |
1618 | } | |
1619 | } | |
e3d6f909 | 1620 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1621 | |
1622 | return NULL; | |
1623 | } | |
1624 | ||
1625 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1626 | { | |
e3d6f909 | 1627 | spin_lock(&lu_gps_lock); |
c66ac9db | 1628 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1629 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1630 | } |
1631 | ||
1632 | /* | |
1633 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1634 | */ | |
1635 | void __core_alua_attach_lu_gp_mem( | |
1636 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1637 | struct t10_alua_lu_gp *lu_gp) | |
1638 | { | |
1639 | spin_lock(&lu_gp->lu_gp_lock); | |
1640 | lu_gp_mem->lu_gp = lu_gp; | |
1641 | lu_gp_mem->lu_gp_assoc = 1; | |
1642 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1643 | lu_gp->lu_gp_members++; | |
1644 | spin_unlock(&lu_gp->lu_gp_lock); | |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1649 | */ | |
1650 | void __core_alua_drop_lu_gp_mem( | |
1651 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1652 | struct t10_alua_lu_gp *lu_gp) | |
1653 | { | |
1654 | spin_lock(&lu_gp->lu_gp_lock); | |
1655 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1656 | lu_gp_mem->lu_gp = NULL; | |
1657 | lu_gp_mem->lu_gp_assoc = 0; | |
1658 | lu_gp->lu_gp_members--; | |
1659 | spin_unlock(&lu_gp->lu_gp_lock); | |
1660 | } | |
1661 | ||
0fd97ccf CH |
1662 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1663 | const char *name, int def_group) | |
c66ac9db NB |
1664 | { |
1665 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1666 | ||
1667 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1668 | if (!tg_pt_gp) { |
1669 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1670 | return NULL; |
1671 | } | |
1672 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1673 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
c66ac9db NB |
1674 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); |
1675 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1676 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
9c6e164c HR |
1677 | INIT_DELAYED_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1678 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1679 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1680 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1681 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1682 | /* |
125d0119 | 1683 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1684 | */ |
1685 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1686 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1687 | /* |
1688 | * Set the default Active/NonOptimized Delay in milliseconds | |
1689 | */ | |
1690 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1691 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1692 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1693 | |
c0dc941e HR |
1694 | /* |
1695 | * Enable all supported states | |
1696 | */ | |
1697 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1698 | ALUA_T_SUP | ALUA_O_SUP | | |
1699 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1700 | ||
c66ac9db | 1701 | if (def_group) { |
0fd97ccf | 1702 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1703 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1704 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1705 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1706 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1707 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1708 | &dev->t10_alua.tg_pt_gps_list); |
1709 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1710 | } |
1711 | ||
1712 | return tg_pt_gp; | |
1713 | } | |
1714 | ||
1715 | int core_alua_set_tg_pt_gp_id( | |
1716 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1717 | u16 tg_pt_gp_id) | |
1718 | { | |
0fd97ccf | 1719 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1720 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1721 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1722 | |
c66ac9db NB |
1723 | /* |
1724 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1725 | */ | |
1726 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1727 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1728 | " ignoring request\n"); |
e3d6f909 | 1729 | return -EINVAL; |
c66ac9db NB |
1730 | } |
1731 | ||
0fd97ccf CH |
1732 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1733 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1734 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1735 | " 0x0000ffff reached\n"); |
0fd97ccf | 1736 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1737 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1738 | return -ENOSPC; |
c66ac9db NB |
1739 | } |
1740 | again: | |
1741 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1742 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1743 | |
0fd97ccf | 1744 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1745 | tg_pt_gp_list) { |
1746 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1747 | if (!tg_pt_gp_id) |
c66ac9db NB |
1748 | goto again; |
1749 | ||
6708bb27 | 1750 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1751 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1752 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1753 | return -EINVAL; |
c66ac9db NB |
1754 | } |
1755 | } | |
1756 | ||
1757 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1758 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1759 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1760 | &dev->t10_alua.tg_pt_gps_list); |
1761 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1762 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1763 | |
1764 | return 0; | |
1765 | } | |
1766 | ||
c66ac9db NB |
1767 | void core_alua_free_tg_pt_gp( |
1768 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1769 | { | |
0fd97ccf | 1770 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1771 | struct se_lun *lun, *next; |
0fd97ccf | 1772 | |
c66ac9db NB |
1773 | /* |
1774 | * Once we have reached this point, config_item_put() has already | |
1775 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1776 | * | |
1777 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1778 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1779 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1780 | */ | |
0fd97ccf | 1781 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1782 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1783 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1784 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1785 | ||
9c6e164c HR |
1786 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1787 | ||
c66ac9db NB |
1788 | /* |
1789 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1790 | * core_alua_get_tg_pt_gp_by_name() in | |
1791 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1792 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1793 | */ | |
1794 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1795 | cpu_relax(); | |
0fd97ccf | 1796 | |
c66ac9db NB |
1797 | /* |
1798 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1799 | * struct se_port. | |
1800 | */ | |
1801 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1802 | list_for_each_entry_safe(lun, next, |
1803 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1804 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1805 | tg_pt_gp->tg_pt_gp_members--; | |
1806 | ||
c66ac9db NB |
1807 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1808 | /* | |
c66ac9db | 1809 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1810 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1811 | * default_tg_pt_gp. |
1812 | */ | |
adf653f9 | 1813 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1814 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1815 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1816 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1817 | } else |
adf653f9 CH |
1818 | lun->lun_tg_pt_gp = NULL; |
1819 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1820 | |
1821 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1822 | } | |
1823 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1824 | ||
1825 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1826 | } | |
1827 | ||
c66ac9db | 1828 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1829 | struct se_device *dev, const char *name) |
c66ac9db NB |
1830 | { |
1831 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1832 | struct config_item *ci; | |
1833 | ||
0fd97ccf CH |
1834 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1835 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1836 | tg_pt_gp_list) { |
6708bb27 | 1837 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1838 | continue; |
1839 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1840 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1841 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1842 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1843 | return tg_pt_gp; |
1844 | } | |
1845 | } | |
0fd97ccf | 1846 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1847 | |
1848 | return NULL; | |
1849 | } | |
1850 | ||
1851 | static void core_alua_put_tg_pt_gp_from_name( | |
1852 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1853 | { | |
0fd97ccf | 1854 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1855 | |
0fd97ccf | 1856 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1857 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1858 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1859 | } |
1860 | ||
adf653f9 CH |
1861 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1862 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1863 | { |
adf653f9 CH |
1864 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1865 | ||
c66ac9db | 1866 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1867 | lun->lun_tg_pt_gp = tg_pt_gp; |
1868 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db NB |
1869 | tg_pt_gp->tg_pt_gp_members++; |
1870 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1871 | } | |
1872 | ||
adf653f9 CH |
1873 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1874 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1875 | { | |
1876 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1877 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1878 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1879 | } | |
1880 | ||
1881 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1882 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1883 | { |
adf653f9 CH |
1884 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1885 | ||
c66ac9db | 1886 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1887 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1888 | tg_pt_gp->tg_pt_gp_members--; |
1889 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1890 | |
1891 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1892 | } |
1893 | ||
adf653f9 CH |
1894 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1895 | { | |
1896 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1897 | ||
1898 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1899 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1900 | if (tg_pt_gp) | |
1901 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1902 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1903 | } | |
1904 | ||
1905 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1906 | { |
c66ac9db | 1907 | struct config_item *tg_pt_ci; |
c66ac9db | 1908 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1909 | ssize_t len = 0; |
1910 | ||
adf653f9 CH |
1911 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1912 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1913 | if (tg_pt_gp) { |
c66ac9db NB |
1914 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1915 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1916 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1917 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1918 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1919 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
1920 | core_alua_dump_state(atomic_read( | |
1921 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
1922 | core_alua_dump_status( | |
1923 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1924 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1925 | "Offline" : "None", |
adf653f9 | 1926 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1927 | } |
adf653f9 | 1928 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1929 | |
1930 | return len; | |
1931 | } | |
1932 | ||
1933 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1934 | struct se_lun *lun, |
c66ac9db NB |
1935 | const char *page, |
1936 | size_t count) | |
1937 | { | |
adf653f9 | 1938 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1939 | /* |
1940 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1941 | * reference to se_device->dev_group. | |
1942 | */ | |
1943 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1944 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1945 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1946 | int move = 0; | |
1947 | ||
adf653f9 CH |
1948 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
1949 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
1950 | return -ENODEV; | |
c66ac9db NB |
1951 | |
1952 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1953 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1954 | return -EINVAL; |
1955 | } | |
1956 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1957 | memcpy(buf, page, count); | |
1958 | /* | |
1959 | * Any ALUA target port group alias besides "NULL" means we will be | |
1960 | * making a new group association. | |
1961 | */ | |
1962 | if (strcmp(strstrip(buf), "NULL")) { | |
1963 | /* | |
1964 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1965 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1966 | * core_alua_put_tg_pt_gp_from_name() below. | |
1967 | */ | |
0fd97ccf | 1968 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1969 | strstrip(buf)); |
6708bb27 | 1970 | if (!tg_pt_gp_new) |
c66ac9db NB |
1971 | return -ENODEV; |
1972 | } | |
c66ac9db | 1973 | |
adf653f9 CH |
1974 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1975 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1976 | if (tg_pt_gp) { |
c66ac9db NB |
1977 | /* |
1978 | * Clearing an existing tg_pt_gp association, and replacing | |
1979 | * with the default_tg_pt_gp. | |
1980 | */ | |
6708bb27 AG |
1981 | if (!tg_pt_gp_new) { |
1982 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
1983 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
1984 | " alua/%s, ID: %hu back to" | |
1985 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
1986 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1987 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1988 | config_item_name(&lun->lun_group.cg_item), |
1989 | config_item_name( | |
1990 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
1991 | tg_pt_gp->tg_pt_gp_id); | |
1992 | ||
adf653f9 CH |
1993 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
1994 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 1995 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 1996 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1997 | |
1998 | return count; | |
1999 | } | |
adf653f9 | 2000 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
2001 | move = 1; |
2002 | } | |
adf653f9 CH |
2003 | |
2004 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
2005 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 2006 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2007 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2008 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2009 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2010 | config_item_name(&lun->lun_group.cg_item), |
2011 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2012 | tg_pt_gp_new->tg_pt_gp_id); | |
2013 | ||
2014 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2015 | return count; | |
2016 | } | |
2017 | ||
2018 | ssize_t core_alua_show_access_type( | |
2019 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2020 | char *page) | |
2021 | { | |
125d0119 HR |
2022 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2023 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2024 | return sprintf(page, "Implicit and Explicit\n"); | |
2025 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2026 | return sprintf(page, "Implicit\n"); | |
2027 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2028 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2029 | else |
2030 | return sprintf(page, "None\n"); | |
2031 | } | |
2032 | ||
2033 | ssize_t core_alua_store_access_type( | |
2034 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2035 | const char *page, | |
2036 | size_t count) | |
2037 | { | |
2038 | unsigned long tmp; | |
2039 | int ret; | |
2040 | ||
57103d7f | 2041 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2042 | if (ret < 0) { |
6708bb27 | 2043 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2044 | return ret; |
c66ac9db NB |
2045 | } |
2046 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2047 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2048 | " %lu\n", tmp); |
2049 | return -EINVAL; | |
2050 | } | |
2051 | if (tmp == 3) | |
2052 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2053 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2054 | else if (tmp == 2) |
125d0119 | 2055 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2056 | else if (tmp == 1) |
125d0119 | 2057 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2058 | else |
2059 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2060 | ||
2061 | return count; | |
2062 | } | |
2063 | ||
2064 | ssize_t core_alua_show_nonop_delay_msecs( | |
2065 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2066 | char *page) | |
2067 | { | |
2068 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2069 | } | |
2070 | ||
2071 | ssize_t core_alua_store_nonop_delay_msecs( | |
2072 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2073 | const char *page, | |
2074 | size_t count) | |
2075 | { | |
2076 | unsigned long tmp; | |
2077 | int ret; | |
2078 | ||
57103d7f | 2079 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2080 | if (ret < 0) { |
6708bb27 | 2081 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2082 | return ret; |
c66ac9db NB |
2083 | } |
2084 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2085 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2086 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2087 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2088 | return -EINVAL; | |
2089 | } | |
2090 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2091 | ||
2092 | return count; | |
2093 | } | |
2094 | ||
2095 | ssize_t core_alua_show_trans_delay_msecs( | |
2096 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2097 | char *page) | |
2098 | { | |
2099 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2100 | } | |
2101 | ||
2102 | ssize_t core_alua_store_trans_delay_msecs( | |
2103 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2104 | const char *page, | |
2105 | size_t count) | |
2106 | { | |
2107 | unsigned long tmp; | |
2108 | int ret; | |
2109 | ||
57103d7f | 2110 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2111 | if (ret < 0) { |
6708bb27 | 2112 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2113 | return ret; |
c66ac9db NB |
2114 | } |
2115 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2116 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2117 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2118 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2119 | return -EINVAL; | |
2120 | } | |
2121 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2122 | ||
2123 | return count; | |
2124 | } | |
2125 | ||
125d0119 | 2126 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2127 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2128 | char *page) | |
2129 | { | |
125d0119 | 2130 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2131 | } |
2132 | ||
125d0119 | 2133 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2134 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2135 | const char *page, | |
2136 | size_t count) | |
2137 | { | |
2138 | unsigned long tmp; | |
2139 | int ret; | |
2140 | ||
57103d7f | 2141 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2142 | if (ret < 0) { |
125d0119 | 2143 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2144 | return ret; |
5b9a4d72 | 2145 | } |
125d0119 HR |
2146 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2147 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2148 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2149 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2150 | return -EINVAL; |
2151 | } | |
125d0119 | 2152 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2153 | |
2154 | return count; | |
2155 | } | |
2156 | ||
c66ac9db NB |
2157 | ssize_t core_alua_show_preferred_bit( |
2158 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2159 | char *page) | |
2160 | { | |
2161 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2162 | } | |
2163 | ||
2164 | ssize_t core_alua_store_preferred_bit( | |
2165 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2166 | const char *page, | |
2167 | size_t count) | |
2168 | { | |
2169 | unsigned long tmp; | |
2170 | int ret; | |
2171 | ||
57103d7f | 2172 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2173 | if (ret < 0) { |
6708bb27 | 2174 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2175 | return ret; |
c66ac9db NB |
2176 | } |
2177 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2178 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2179 | return -EINVAL; |
2180 | } | |
2181 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2182 | ||
2183 | return count; | |
2184 | } | |
2185 | ||
2186 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2187 | { | |
c66ac9db | 2188 | return sprintf(page, "%d\n", |
adf653f9 | 2189 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2190 | } |
2191 | ||
2192 | ssize_t core_alua_store_offline_bit( | |
2193 | struct se_lun *lun, | |
2194 | const char *page, | |
2195 | size_t count) | |
2196 | { | |
4cc987ea NB |
2197 | /* |
2198 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2199 | * reference to se_device->dev_group. | |
2200 | */ | |
2201 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2202 | unsigned long tmp; |
2203 | int ret; | |
2204 | ||
adf653f9 CH |
2205 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
2206 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
c66ac9db NB |
2207 | return -ENODEV; |
2208 | ||
57103d7f | 2209 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2210 | if (ret < 0) { |
6708bb27 | 2211 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2212 | return ret; |
c66ac9db NB |
2213 | } |
2214 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2215 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2216 | tmp); |
2217 | return -EINVAL; | |
2218 | } | |
c66ac9db | 2219 | |
adf653f9 | 2220 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2221 | if (ret < 0) |
2222 | return -EINVAL; | |
2223 | ||
2224 | return count; | |
2225 | } | |
2226 | ||
2227 | ssize_t core_alua_show_secondary_status( | |
2228 | struct se_lun *lun, | |
2229 | char *page) | |
2230 | { | |
adf653f9 | 2231 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2232 | } |
2233 | ||
2234 | ssize_t core_alua_store_secondary_status( | |
2235 | struct se_lun *lun, | |
2236 | const char *page, | |
2237 | size_t count) | |
2238 | { | |
2239 | unsigned long tmp; | |
2240 | int ret; | |
2241 | ||
57103d7f | 2242 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2243 | if (ret < 0) { |
6708bb27 | 2244 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2245 | return ret; |
c66ac9db NB |
2246 | } |
2247 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2248 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2249 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2250 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2251 | tmp); |
2252 | return -EINVAL; | |
2253 | } | |
adf653f9 | 2254 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2255 | |
2256 | return count; | |
2257 | } | |
2258 | ||
2259 | ssize_t core_alua_show_secondary_write_metadata( | |
2260 | struct se_lun *lun, | |
2261 | char *page) | |
2262 | { | |
adf653f9 | 2263 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2264 | } |
2265 | ||
2266 | ssize_t core_alua_store_secondary_write_metadata( | |
2267 | struct se_lun *lun, | |
2268 | const char *page, | |
2269 | size_t count) | |
2270 | { | |
2271 | unsigned long tmp; | |
2272 | int ret; | |
2273 | ||
57103d7f | 2274 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2275 | if (ret < 0) { |
6708bb27 | 2276 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2277 | return ret; |
c66ac9db NB |
2278 | } |
2279 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2280 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2281 | " %lu\n", tmp); |
2282 | return -EINVAL; | |
2283 | } | |
adf653f9 | 2284 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2285 | |
2286 | return count; | |
2287 | } | |
2288 | ||
0fd97ccf | 2289 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2290 | { |
a3541703 | 2291 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && |
c87fbd56 CH |
2292 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2293 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2294 | |
c66ac9db | 2295 | /* |
25985edc | 2296 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2297 | * LUN Group. |
2298 | */ | |
2299 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2300 | if (IS_ERR(lu_gp_mem)) |
2301 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2302 | |
c66ac9db NB |
2303 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2304 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2305 | default_lu_gp); |
c66ac9db NB |
2306 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2307 | ||
6708bb27 | 2308 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2309 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2310 | dev->transport->name); |
c66ac9db NB |
2311 | } |
2312 | ||
2313 | return 0; | |
2314 | } |