]>
Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_alua.c | |
3 | * | |
4 | * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA) | |
5 | * | |
4c76251e | 6 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/slab.h> |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/configfs.h> | |
c53181af | 29 | #include <linux/export.h> |
0e9b10a9 | 30 | #include <linux/file.h> |
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 | ||
ee8c07d0 | 944 | static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db NB |
945 | { |
946 | struct se_dev_entry *se_deve; | |
adf653f9 | 947 | struct se_lun *lun; |
c66ac9db | 948 | struct se_lun_acl *lacl; |
c66ac9db NB |
949 | |
950 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
951 | list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
952 | lun_tg_pt_gp_link) { | |
c66ac9db NB |
953 | /* |
954 | * After an implicit target port asymmetric access state | |
955 | * change, a device server shall establish a unit attention | |
956 | * condition for the initiator port associated with every I_T | |
957 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 958 | * ACCESS STATE CHANGED. |
c66ac9db NB |
959 | * |
960 | * After an explicit target port asymmetric access state | |
961 | * change, a device server shall establish a unit attention | |
962 | * condition with the additional sense code set to ASYMMETRIC | |
963 | * ACCESS STATE CHANGED for the initiator port associated with | |
964 | * every I_T nexus other than the I_T nexus on which the SET | |
965 | * TARGET PORT GROUPS command | |
966 | */ | |
9e37d042 NB |
967 | if (!percpu_ref_tryget_live(&lun->lun_ref)) |
968 | continue; | |
c66ac9db NB |
969 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
970 | ||
adf653f9 CH |
971 | spin_lock_bh(&lun->lun_deve_lock); |
972 | list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) { | |
29a05dee | 973 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
adf653f9 | 974 | lockdep_is_held(&lun->lun_deve_lock)); |
c66ac9db NB |
975 | /* |
976 | * se_deve->se_lun_acl pointer may be NULL for a | |
125d0119 | 977 | * entry created without explicit Node+MappedLUN ACLs |
c66ac9db | 978 | */ |
6708bb27 | 979 | if (!lacl) |
c66ac9db NB |
980 | continue; |
981 | ||
9c6e164c HR |
982 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
983 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
984 | (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
985 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl) && | |
adf653f9 CH |
986 | (tg_pt_gp->tg_pt_gp_alua_lun != NULL) && |
987 | (tg_pt_gp->tg_pt_gp_alua_lun == lun)) | |
c66ac9db NB |
988 | continue; |
989 | ||
990 | core_scsi3_ua_allocate(lacl->se_lun_nacl, | |
991 | se_deve->mapped_lun, 0x2A, | |
992 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); | |
993 | } | |
adf653f9 | 994 | spin_unlock_bh(&lun->lun_deve_lock); |
c66ac9db NB |
995 | |
996 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
9e37d042 | 997 | percpu_ref_put(&lun->lun_ref); |
c66ac9db NB |
998 | } |
999 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
ee8c07d0 HR |
1000 | } |
1001 | ||
1002 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) | |
1003 | { | |
1004 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, | |
1005 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work); | |
1006 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1007 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == | |
1008 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
1009 | ||
c66ac9db NB |
1010 | /* |
1011 | * Update the ALUA metadata buf that has been allocated in | |
1012 | * core_alua_do_port_transition(), this metadata will be written | |
1013 | * to struct file. | |
1014 | * | |
1015 | * Note that there is the case where we do not want to update the | |
1016 | * metadata when the saved metadata is being parsed in userspace | |
1017 | * when setting the existing port access state and access status. | |
1018 | * | |
1019 | * Also note that the failure to write out the ALUA metadata to | |
1020 | * struct file does NOT affect the actual ALUA transition. | |
1021 | */ | |
1022 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1023 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1024 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1025 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1026 | } | |
1027 | /* | |
1028 | * Set the current primary ALUA access state to the requested new state | |
1029 | */ | |
dfbce75a HR |
1030 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1031 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1032 | |
6708bb27 | 1033 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1034 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1035 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1036 | tg_pt_gp->tg_pt_gp_id, |
1037 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1038 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
ee8c07d0 HR |
1039 | |
1040 | core_alua_queue_state_change_ua(tg_pt_gp); | |
1041 | ||
9c6e164c HR |
1042 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1043 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1044 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1045 | ||
1046 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1047 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1048 | } | |
1049 | ||
1050 | static int core_alua_do_transition_tg_pt( | |
1051 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1052 | int new_state, | |
1053 | int explicit) | |
1054 | { | |
1055 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1056 | DECLARE_COMPLETION_ONSTACK(wait); | |
1057 | ||
1058 | /* Nothing to be done here */ | |
1059 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1060 | return 0; | |
1061 | ||
1062 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) | |
1063 | return -EAGAIN; | |
1064 | ||
1065 | /* | |
1066 | * Flush any pending transitions | |
1067 | */ | |
1068 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs && | |
1069 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == | |
1070 | ALUA_ACCESS_STATE_TRANSITION) { | |
1071 | /* Just in case */ | |
1072 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1073 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1074 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); | |
1075 | wait_for_completion(&wait); | |
1076 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Save the old primary ALUA access state, and set the current state | |
1082 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1083 | */ | |
1084 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1085 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1086 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1087 | ||
1088 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, | |
1089 | ALUA_ACCESS_STATE_TRANSITION); | |
1090 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1091 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1092 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1093 | ||
ee8c07d0 HR |
1094 | core_alua_queue_state_change_ua(tg_pt_gp); |
1095 | ||
9c6e164c HR |
1096 | /* |
1097 | * Check for the optional ALUA primary state transition delay | |
1098 | */ | |
1099 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1100 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1101 | ||
1102 | /* | |
1103 | * Take a reference for workqueue item | |
1104 | */ | |
1105 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1106 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1107 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1108 | ||
1109 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) { | |
1110 | unsigned long transition_tmo; | |
1111 | ||
1112 | transition_tmo = tg_pt_gp->tg_pt_gp_implicit_trans_secs * HZ; | |
1113 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1114 | &tg_pt_gp->tg_pt_gp_transition_work, | |
1115 | transition_tmo); | |
1116 | } else { | |
1117 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1118 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1119 | &tg_pt_gp->tg_pt_gp_transition_work, 0); | |
1120 | wait_for_completion(&wait); | |
1121 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1122 | } | |
c66ac9db NB |
1123 | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | int core_alua_do_port_transition( | |
1128 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1129 | struct se_device *l_dev, | |
adf653f9 | 1130 | struct se_lun *l_lun, |
c66ac9db NB |
1131 | struct se_node_acl *l_nacl, |
1132 | int new_state, | |
125d0119 | 1133 | int explicit) |
c66ac9db NB |
1134 | { |
1135 | struct se_device *dev; | |
c66ac9db NB |
1136 | struct t10_alua_lu_gp *lu_gp; |
1137 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1138 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1139 | int primary, valid_states, rc = 0; |
c66ac9db | 1140 | |
bb91c1a0 HR |
1141 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1142 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) | |
c66ac9db NB |
1143 | return -EINVAL; |
1144 | ||
c66ac9db NB |
1145 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1146 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1147 | lu_gp = local_lu_gp_mem->lu_gp; | |
1148 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1149 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1150 | /* | |
1151 | * For storage objects that are members of the 'default_lu_gp', | |
1152 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1153 | * on all of the matching target port groups IDs in default_lu_gp. | |
1154 | */ | |
6708bb27 | 1155 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1156 | /* |
1157 | * core_alua_do_transition_tg_pt() will always return | |
1158 | * success. | |
1159 | */ | |
adf653f9 | 1160 | l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c HR |
1161 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
1162 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1163 | new_state, explicit); | |
33940d09 | 1164 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1165 | return rc; |
c66ac9db NB |
1166 | } |
1167 | /* | |
1168 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1169 | * the associated storage objects looking for a matching target port | |
1170 | * group ID from the local target port group. | |
1171 | */ | |
1172 | spin_lock(&lu_gp->lu_gp_lock); | |
1173 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1174 | lu_gp_mem_list) { | |
1175 | ||
1176 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1177 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1178 | spin_unlock(&lu_gp->lu_gp_lock); |
1179 | ||
0fd97ccf | 1180 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1181 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1182 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1183 | tg_pt_gp_list) { |
1184 | ||
6708bb27 | 1185 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1186 | continue; |
1187 | /* | |
1188 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1189 | * is changed for any target port group accessible via |
c66ac9db NB |
1190 | * a logical unit within a LU group, the target port |
1191 | * behavior group asymmetric access states for the same | |
1192 | * target port group accessible via other logical units | |
1193 | * in that LU group will also change. | |
1194 | */ | |
1195 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1196 | continue; | |
1197 | ||
1198 | if (l_tg_pt_gp == tg_pt_gp) { | |
adf653f9 | 1199 | tg_pt_gp->tg_pt_gp_alua_lun = l_lun; |
9c6e164c | 1200 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; |
c66ac9db | 1201 | } else { |
adf653f9 | 1202 | tg_pt_gp->tg_pt_gp_alua_lun = NULL; |
9c6e164c | 1203 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; |
c66ac9db | 1204 | } |
33940d09 | 1205 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1206 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1207 | /* |
1208 | * core_alua_do_transition_tg_pt() will always return | |
1209 | * success. | |
1210 | */ | |
9c6e164c HR |
1211 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1212 | new_state, explicit); | |
c66ac9db | 1213 | |
0fd97ccf | 1214 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1215 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1216 | if (rc) |
1217 | break; | |
c66ac9db | 1218 | } |
0fd97ccf | 1219 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1220 | |
1221 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1222 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1223 | } |
1224 | spin_unlock(&lu_gp->lu_gp_lock); | |
1225 | ||
9c6e164c HR |
1226 | if (!rc) { |
1227 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1228 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1229 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1230 | l_tg_pt_gp->tg_pt_gp_id, | |
1231 | (explicit) ? "explicit" : "implicit", | |
1232 | core_alua_dump_state(new_state)); | |
1233 | } | |
c66ac9db | 1234 | |
33940d09 | 1235 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1236 | return rc; |
c66ac9db NB |
1237 | } |
1238 | ||
adf653f9 | 1239 | static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun) |
c66ac9db | 1240 | { |
adf653f9 | 1241 | struct se_portal_group *se_tpg = lun->lun_tpg; |
1e0b9403 | 1242 | unsigned char *md_buf; |
c66ac9db | 1243 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; |
1e0b9403 HR |
1244 | int len, rc; |
1245 | ||
adf653f9 CH |
1246 | mutex_lock(&lun->lun_tg_pt_md_mutex); |
1247 | ||
1e0b9403 HR |
1248 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); |
1249 | if (!md_buf) { | |
1250 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
adf653f9 CH |
1251 | rc = -ENOMEM; |
1252 | goto out_unlock; | |
1e0b9403 | 1253 | } |
c66ac9db NB |
1254 | |
1255 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1256 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1257 | ||
1258 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1259 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1260 | |
e3d6f909 | 1261 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1262 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1263 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1264 | |
1e0b9403 | 1265 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db | 1266 | "alua_tg_pt_status=0x%02x\n", |
adf653f9 CH |
1267 | atomic_read(&lun->lun_tg_pt_secondary_offline), |
1268 | lun->lun_tg_pt_secondary_stat); | |
c66ac9db | 1269 | |
f2d30680 | 1270 | snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%llu", |
e3d6f909 | 1271 | se_tpg->se_tpg_tfo->get_fabric_name(), wwn, |
adf653f9 | 1272 | lun->unpacked_lun); |
c66ac9db | 1273 | |
1e0b9403 HR |
1274 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1275 | kfree(md_buf); | |
1276 | ||
adf653f9 CH |
1277 | out_unlock: |
1278 | mutex_unlock(&lun->lun_tg_pt_md_mutex); | |
1e0b9403 | 1279 | return rc; |
c66ac9db NB |
1280 | } |
1281 | ||
1282 | static int core_alua_set_tg_pt_secondary_state( | |
adf653f9 | 1283 | struct se_lun *lun, |
125d0119 | 1284 | int explicit, |
c66ac9db NB |
1285 | int offline) |
1286 | { | |
1287 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1288 | int trans_delay_msecs; |
1289 | ||
adf653f9 CH |
1290 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1291 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1292 | if (!tg_pt_gp) { |
adf653f9 | 1293 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
6708bb27 | 1294 | pr_err("Unable to complete secondary state" |
c66ac9db | 1295 | " transition\n"); |
e3d6f909 | 1296 | return -EINVAL; |
c66ac9db NB |
1297 | } |
1298 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1299 | /* | |
1300 | * Set the secondary ALUA target port access state to OFFLINE | |
adf653f9 | 1301 | * or release the previously secondary state for struct se_lun |
c66ac9db NB |
1302 | */ |
1303 | if (offline) | |
adf653f9 | 1304 | atomic_set(&lun->lun_tg_pt_secondary_offline, 1); |
c66ac9db | 1305 | else |
adf653f9 | 1306 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
c66ac9db | 1307 | |
adf653f9 | 1308 | lun->lun_tg_pt_secondary_stat = (explicit) ? |
125d0119 HR |
1309 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : |
1310 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1311 | |
6708bb27 | 1312 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1313 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1314 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1315 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1316 | ||
adf653f9 | 1317 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1318 | /* |
1319 | * Do the optional transition delay after we set the secondary | |
1320 | * ALUA access state. | |
1321 | */ | |
1322 | if (trans_delay_msecs != 0) | |
1323 | msleep_interruptible(trans_delay_msecs); | |
1324 | /* | |
1325 | * See if we need to update the ALUA fabric port metadata for | |
1326 | * secondary state and status | |
1327 | */ | |
adf653f9 CH |
1328 | if (lun->lun_tg_pt_secondary_write_md) |
1329 | core_alua_update_tpg_secondary_metadata(lun); | |
c66ac9db NB |
1330 | |
1331 | return 0; | |
1332 | } | |
1333 | ||
229d4f11 HR |
1334 | struct t10_alua_lba_map * |
1335 | core_alua_allocate_lba_map(struct list_head *list, | |
1336 | u64 first_lba, u64 last_lba) | |
1337 | { | |
1338 | struct t10_alua_lba_map *lba_map; | |
1339 | ||
1340 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1341 | if (!lba_map) { | |
1342 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1343 | return ERR_PTR(-ENOMEM); | |
1344 | } | |
1345 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1346 | lba_map->lba_map_first_lba = first_lba; | |
1347 | lba_map->lba_map_last_lba = last_lba; | |
1348 | ||
1349 | list_add_tail(&lba_map->lba_map_list, list); | |
1350 | return lba_map; | |
1351 | } | |
1352 | ||
1353 | int | |
1354 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1355 | int pg_id, int state) | |
1356 | { | |
1357 | struct t10_alua_lba_map_member *lba_map_mem; | |
1358 | ||
1359 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1360 | lba_map_mem_list) { | |
1361 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1362 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1363 | return -EINVAL; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1368 | if (!lba_map_mem) { | |
1369 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1370 | return -ENOMEM; | |
1371 | } | |
1372 | lba_map_mem->lba_map_mem_alua_state = state; | |
1373 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1374 | ||
1375 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1376 | &lba_map->lba_map_mem_list); | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | void | |
1381 | core_alua_free_lba_map(struct list_head *lba_list) | |
1382 | { | |
1383 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1384 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1385 | ||
1386 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1387 | lba_map_list) { | |
1388 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1389 | &lba_map->lba_map_mem_list, | |
1390 | lba_map_mem_list) { | |
1391 | list_del(&lba_map_mem->lba_map_mem_list); | |
1392 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1393 | lba_map_mem); | |
1394 | } | |
1395 | list_del(&lba_map->lba_map_list); | |
1396 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | void | |
1401 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1402 | int segment_size, int segment_mult) | |
1403 | { | |
1404 | struct list_head old_lba_map_list; | |
1405 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1406 | int activate = 0, supported; | |
1407 | ||
1408 | INIT_LIST_HEAD(&old_lba_map_list); | |
1409 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1410 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1411 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1412 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1413 | if (lba_map_list) { | |
1414 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1415 | activate = 1; | |
1416 | } | |
1417 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1418 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1419 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1420 | tg_pt_gp_list) { | |
1421 | ||
1422 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1423 | continue; | |
1424 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1425 | if (activate) | |
1426 | supported |= ALUA_LBD_SUP; | |
1427 | else | |
1428 | supported &= ~ALUA_LBD_SUP; | |
1429 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1430 | } | |
1431 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1432 | core_alua_free_lba_map(&old_lba_map_list); | |
1433 | } | |
1434 | ||
c66ac9db NB |
1435 | struct t10_alua_lu_gp * |
1436 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1437 | { | |
1438 | struct t10_alua_lu_gp *lu_gp; | |
1439 | ||
1440 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1441 | if (!lu_gp) { |
1442 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1443 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1444 | } |
e3d6f909 | 1445 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1446 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1447 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1448 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1449 | ||
1450 | if (def_group) { | |
e3d6f909 | 1451 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1452 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1453 | alua_lu_gps_count++; |
c66ac9db NB |
1454 | } |
1455 | ||
1456 | return lu_gp; | |
1457 | } | |
1458 | ||
1459 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1460 | { | |
1461 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1462 | u16 lu_gp_id_tmp; | |
1463 | /* | |
1464 | * The lu_gp->lu_gp_id may only be set once.. | |
1465 | */ | |
1466 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1467 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1468 | " ignoring request\n"); |
e3d6f909 | 1469 | return -EINVAL; |
c66ac9db NB |
1470 | } |
1471 | ||
e3d6f909 AG |
1472 | spin_lock(&lu_gps_lock); |
1473 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1474 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1475 | " 0x0000ffff reached\n"); |
e3d6f909 | 1476 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1477 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1478 | return -ENOSPC; |
c66ac9db NB |
1479 | } |
1480 | again: | |
1481 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1482 | alua_lu_gps_counter++; |
c66ac9db | 1483 | |
e3d6f909 | 1484 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1485 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1486 | if (!lu_gp_id) |
c66ac9db NB |
1487 | goto again; |
1488 | ||
6708bb27 | 1489 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1490 | " already exists, ignoring request\n", |
1491 | lu_gp_id); | |
e3d6f909 AG |
1492 | spin_unlock(&lu_gps_lock); |
1493 | return -EINVAL; | |
c66ac9db NB |
1494 | } |
1495 | } | |
1496 | ||
1497 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1498 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1499 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1500 | alua_lu_gps_count++; | |
1501 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1502 | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | static struct t10_alua_lu_gp_member * | |
1507 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1508 | { | |
1509 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1510 | ||
1511 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1512 | if (!lu_gp_mem) { |
1513 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1514 | return ERR_PTR(-ENOMEM); |
1515 | } | |
1516 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1517 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1518 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1519 | ||
1520 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1521 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1522 | ||
1523 | return lu_gp_mem; | |
1524 | } | |
1525 | ||
1526 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1527 | { | |
1528 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1529 | /* | |
1530 | * Once we have reached this point, config_item_put() has | |
1531 | * already been called from target_core_alua_drop_lu_gp(). | |
1532 | * | |
1533 | * Here, we remove the *lu_gp from the global list so that | |
1534 | * no associations can be made while we are releasing | |
1535 | * struct t10_alua_lu_gp. | |
1536 | */ | |
e3d6f909 | 1537 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1538 | list_del(&lu_gp->lu_gp_node); |
1539 | alua_lu_gps_count--; | |
1540 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1541 | /* |
1542 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1543 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1544 | * released with core_alua_put_lu_gp_from_name() | |
1545 | */ | |
1546 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1547 | cpu_relax(); | |
1548 | /* | |
1549 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1550 | * struct se_device. | |
1551 | */ | |
1552 | spin_lock(&lu_gp->lu_gp_lock); | |
1553 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1554 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1555 | if (lu_gp_mem->lu_gp_assoc) { | |
1556 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1557 | lu_gp->lu_gp_members--; | |
1558 | lu_gp_mem->lu_gp_assoc = 0; | |
1559 | } | |
1560 | spin_unlock(&lu_gp->lu_gp_lock); | |
1561 | /* | |
1562 | * | |
25985edc | 1563 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1564 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1565 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1566 | * | |
1567 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1568 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1569 | */ |
1570 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1571 | if (lu_gp != default_lu_gp) |
c66ac9db | 1572 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1573 | default_lu_gp); |
c66ac9db NB |
1574 | else |
1575 | lu_gp_mem->lu_gp = NULL; | |
1576 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1577 | ||
1578 | spin_lock(&lu_gp->lu_gp_lock); | |
1579 | } | |
1580 | spin_unlock(&lu_gp->lu_gp_lock); | |
1581 | ||
1582 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1583 | } | |
1584 | ||
1585 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1586 | { | |
c66ac9db NB |
1587 | struct t10_alua_lu_gp *lu_gp; |
1588 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1589 | ||
c66ac9db | 1590 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1591 | if (!lu_gp_mem) |
c66ac9db NB |
1592 | return; |
1593 | ||
1594 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1595 | cpu_relax(); | |
1596 | ||
1597 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1598 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1599 | if (lu_gp) { |
c66ac9db NB |
1600 | spin_lock(&lu_gp->lu_gp_lock); |
1601 | if (lu_gp_mem->lu_gp_assoc) { | |
1602 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1603 | lu_gp->lu_gp_members--; | |
1604 | lu_gp_mem->lu_gp_assoc = 0; | |
1605 | } | |
1606 | spin_unlock(&lu_gp->lu_gp_lock); | |
1607 | lu_gp_mem->lu_gp = NULL; | |
1608 | } | |
1609 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1610 | ||
1611 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1612 | } | |
1613 | ||
1614 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1615 | { | |
1616 | struct t10_alua_lu_gp *lu_gp; | |
1617 | struct config_item *ci; | |
1618 | ||
e3d6f909 AG |
1619 | spin_lock(&lu_gps_lock); |
1620 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1621 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1622 | continue; |
1623 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1624 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1625 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1626 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1627 | return lu_gp; |
1628 | } | |
1629 | } | |
e3d6f909 | 1630 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1631 | |
1632 | return NULL; | |
1633 | } | |
1634 | ||
1635 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1636 | { | |
e3d6f909 | 1637 | spin_lock(&lu_gps_lock); |
c66ac9db | 1638 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1639 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1640 | } |
1641 | ||
1642 | /* | |
1643 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1644 | */ | |
1645 | void __core_alua_attach_lu_gp_mem( | |
1646 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1647 | struct t10_alua_lu_gp *lu_gp) | |
1648 | { | |
1649 | spin_lock(&lu_gp->lu_gp_lock); | |
1650 | lu_gp_mem->lu_gp = lu_gp; | |
1651 | lu_gp_mem->lu_gp_assoc = 1; | |
1652 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1653 | lu_gp->lu_gp_members++; | |
1654 | spin_unlock(&lu_gp->lu_gp_lock); | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1659 | */ | |
1660 | void __core_alua_drop_lu_gp_mem( | |
1661 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1662 | struct t10_alua_lu_gp *lu_gp) | |
1663 | { | |
1664 | spin_lock(&lu_gp->lu_gp_lock); | |
1665 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1666 | lu_gp_mem->lu_gp = NULL; | |
1667 | lu_gp_mem->lu_gp_assoc = 0; | |
1668 | lu_gp->lu_gp_members--; | |
1669 | spin_unlock(&lu_gp->lu_gp_lock); | |
1670 | } | |
1671 | ||
0fd97ccf CH |
1672 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1673 | const char *name, int def_group) | |
c66ac9db NB |
1674 | { |
1675 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1676 | ||
1677 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1678 | if (!tg_pt_gp) { |
1679 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1680 | return NULL; |
1681 | } | |
1682 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
adf653f9 | 1683 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list); |
c66ac9db NB |
1684 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); |
1685 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1686 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
9c6e164c HR |
1687 | INIT_DELAYED_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1688 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1689 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1690 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1691 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1692 | /* |
125d0119 | 1693 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1694 | */ |
1695 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1696 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1697 | /* |
1698 | * Set the default Active/NonOptimized Delay in milliseconds | |
1699 | */ | |
1700 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1701 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1702 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1703 | |
c0dc941e HR |
1704 | /* |
1705 | * Enable all supported states | |
1706 | */ | |
1707 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1708 | ALUA_T_SUP | ALUA_O_SUP | | |
1709 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1710 | ||
c66ac9db | 1711 | if (def_group) { |
0fd97ccf | 1712 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1713 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1714 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1715 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1716 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1717 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1718 | &dev->t10_alua.tg_pt_gps_list); |
1719 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1720 | } |
1721 | ||
1722 | return tg_pt_gp; | |
1723 | } | |
1724 | ||
1725 | int core_alua_set_tg_pt_gp_id( | |
1726 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1727 | u16 tg_pt_gp_id) | |
1728 | { | |
0fd97ccf | 1729 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1730 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1731 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1732 | |
c66ac9db NB |
1733 | /* |
1734 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1735 | */ | |
1736 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1737 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1738 | " ignoring request\n"); |
e3d6f909 | 1739 | return -EINVAL; |
c66ac9db NB |
1740 | } |
1741 | ||
0fd97ccf CH |
1742 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1743 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1744 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1745 | " 0x0000ffff reached\n"); |
0fd97ccf | 1746 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1747 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1748 | return -ENOSPC; |
c66ac9db NB |
1749 | } |
1750 | again: | |
1751 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1752 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1753 | |
0fd97ccf | 1754 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1755 | tg_pt_gp_list) { |
1756 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1757 | if (!tg_pt_gp_id) |
c66ac9db NB |
1758 | goto again; |
1759 | ||
6708bb27 | 1760 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1761 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1762 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1763 | return -EINVAL; |
c66ac9db NB |
1764 | } |
1765 | } | |
1766 | ||
1767 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1768 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1769 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1770 | &dev->t10_alua.tg_pt_gps_list); |
1771 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1772 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1773 | |
1774 | return 0; | |
1775 | } | |
1776 | ||
c66ac9db NB |
1777 | void core_alua_free_tg_pt_gp( |
1778 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1779 | { | |
0fd97ccf | 1780 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
adf653f9 | 1781 | struct se_lun *lun, *next; |
0fd97ccf | 1782 | |
c66ac9db NB |
1783 | /* |
1784 | * Once we have reached this point, config_item_put() has already | |
1785 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1786 | * | |
1787 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1788 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1789 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1790 | */ | |
0fd97ccf | 1791 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1792 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1793 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1794 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1795 | ||
9c6e164c HR |
1796 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1797 | ||
c66ac9db NB |
1798 | /* |
1799 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1800 | * core_alua_get_tg_pt_gp_by_name() in | |
1801 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1802 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1803 | */ | |
1804 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1805 | cpu_relax(); | |
0fd97ccf | 1806 | |
c66ac9db NB |
1807 | /* |
1808 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1809 | * struct se_port. | |
1810 | */ | |
1811 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1812 | list_for_each_entry_safe(lun, next, |
1813 | &tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) { | |
1814 | list_del_init(&lun->lun_tg_pt_gp_link); | |
1815 | tg_pt_gp->tg_pt_gp_members--; | |
1816 | ||
c66ac9db NB |
1817 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1818 | /* | |
c66ac9db | 1819 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, |
f1ae05d5 | 1820 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1821 | * default_tg_pt_gp. |
1822 | */ | |
adf653f9 | 1823 | spin_lock(&lun->lun_tg_pt_gp_lock); |
0fd97ccf | 1824 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
adf653f9 | 1825 | __target_attach_tg_pt_gp(lun, |
0fd97ccf | 1826 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db | 1827 | } else |
adf653f9 CH |
1828 | lun->lun_tg_pt_gp = NULL; |
1829 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
c66ac9db NB |
1830 | |
1831 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1832 | } | |
1833 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1834 | ||
1835 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1836 | } | |
1837 | ||
c66ac9db | 1838 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( |
0fd97ccf | 1839 | struct se_device *dev, const char *name) |
c66ac9db NB |
1840 | { |
1841 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1842 | struct config_item *ci; | |
1843 | ||
0fd97ccf CH |
1844 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1845 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1846 | tg_pt_gp_list) { |
6708bb27 | 1847 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1848 | continue; |
1849 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1850 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1851 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1852 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1853 | return tg_pt_gp; |
1854 | } | |
1855 | } | |
0fd97ccf | 1856 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1857 | |
1858 | return NULL; | |
1859 | } | |
1860 | ||
1861 | static void core_alua_put_tg_pt_gp_from_name( | |
1862 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1863 | { | |
0fd97ccf | 1864 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1865 | |
0fd97ccf | 1866 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1867 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1868 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1869 | } |
1870 | ||
adf653f9 CH |
1871 | static void __target_attach_tg_pt_gp(struct se_lun *lun, |
1872 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1873 | { |
adf653f9 CH |
1874 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1875 | ||
c66ac9db | 1876 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 CH |
1877 | lun->lun_tg_pt_gp = tg_pt_gp; |
1878 | list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list); | |
c66ac9db NB |
1879 | tg_pt_gp->tg_pt_gp_members++; |
1880 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1881 | } | |
1882 | ||
adf653f9 CH |
1883 | void target_attach_tg_pt_gp(struct se_lun *lun, |
1884 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1885 | { | |
1886 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1887 | __target_attach_tg_pt_gp(lun, tg_pt_gp); | |
1888 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1889 | } | |
1890 | ||
1891 | static void __target_detach_tg_pt_gp(struct se_lun *lun, | |
1892 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
c66ac9db | 1893 | { |
adf653f9 CH |
1894 | assert_spin_locked(&lun->lun_tg_pt_gp_lock); |
1895 | ||
c66ac9db | 1896 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
adf653f9 | 1897 | list_del_init(&lun->lun_tg_pt_gp_link); |
c66ac9db NB |
1898 | tg_pt_gp->tg_pt_gp_members--; |
1899 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
adf653f9 CH |
1900 | |
1901 | lun->lun_tg_pt_gp = NULL; | |
c66ac9db NB |
1902 | } |
1903 | ||
adf653f9 CH |
1904 | void target_detach_tg_pt_gp(struct se_lun *lun) |
1905 | { | |
1906 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1907 | ||
1908 | spin_lock(&lun->lun_tg_pt_gp_lock); | |
1909 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1910 | if (tg_pt_gp) | |
1911 | __target_detach_tg_pt_gp(lun, tg_pt_gp); | |
1912 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
1913 | } | |
1914 | ||
1915 | ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page) | |
c66ac9db | 1916 | { |
c66ac9db | 1917 | struct config_item *tg_pt_ci; |
c66ac9db | 1918 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
c66ac9db NB |
1919 | ssize_t len = 0; |
1920 | ||
adf653f9 CH |
1921 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1922 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1923 | if (tg_pt_gp) { |
c66ac9db NB |
1924 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1925 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1926 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1927 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1928 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1929 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
1930 | core_alua_dump_state(atomic_read( | |
1931 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
1932 | core_alua_dump_status( | |
1933 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
adf653f9 | 1934 | atomic_read(&lun->lun_tg_pt_secondary_offline) ? |
c66ac9db | 1935 | "Offline" : "None", |
adf653f9 | 1936 | core_alua_dump_status(lun->lun_tg_pt_secondary_stat)); |
c66ac9db | 1937 | } |
adf653f9 | 1938 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
1939 | |
1940 | return len; | |
1941 | } | |
1942 | ||
1943 | ssize_t core_alua_store_tg_pt_gp_info( | |
adf653f9 | 1944 | struct se_lun *lun, |
c66ac9db NB |
1945 | const char *page, |
1946 | size_t count) | |
1947 | { | |
adf653f9 | 1948 | struct se_portal_group *tpg = lun->lun_tpg; |
4cc987ea NB |
1949 | /* |
1950 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1951 | * reference to se_device->dev_group. | |
1952 | */ | |
1953 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 1954 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
c66ac9db NB |
1955 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; |
1956 | int move = 0; | |
1957 | ||
adf653f9 CH |
1958 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
1959 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
1960 | return -ENODEV; | |
c66ac9db NB |
1961 | |
1962 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 1963 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
1964 | return -EINVAL; |
1965 | } | |
1966 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
1967 | memcpy(buf, page, count); | |
1968 | /* | |
1969 | * Any ALUA target port group alias besides "NULL" means we will be | |
1970 | * making a new group association. | |
1971 | */ | |
1972 | if (strcmp(strstrip(buf), "NULL")) { | |
1973 | /* | |
1974 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
1975 | * struct t10_alua_tg_pt_gp. This reference is released with | |
1976 | * core_alua_put_tg_pt_gp_from_name() below. | |
1977 | */ | |
0fd97ccf | 1978 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 1979 | strstrip(buf)); |
6708bb27 | 1980 | if (!tg_pt_gp_new) |
c66ac9db NB |
1981 | return -ENODEV; |
1982 | } | |
c66ac9db | 1983 | |
adf653f9 CH |
1984 | spin_lock(&lun->lun_tg_pt_gp_lock); |
1985 | tg_pt_gp = lun->lun_tg_pt_gp; | |
6708bb27 | 1986 | if (tg_pt_gp) { |
c66ac9db NB |
1987 | /* |
1988 | * Clearing an existing tg_pt_gp association, and replacing | |
1989 | * with the default_tg_pt_gp. | |
1990 | */ | |
6708bb27 AG |
1991 | if (!tg_pt_gp_new) { |
1992 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
1993 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
1994 | " alua/%s, ID: %hu back to" | |
1995 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
1996 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1997 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1998 | config_item_name(&lun->lun_group.cg_item), |
1999 | config_item_name( | |
2000 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
2001 | tg_pt_gp->tg_pt_gp_id); | |
2002 | ||
adf653f9 CH |
2003 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
2004 | __target_attach_tg_pt_gp(lun, | |
0fd97ccf | 2005 | dev->t10_alua.default_tg_pt_gp); |
adf653f9 | 2006 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
c66ac9db NB |
2007 | |
2008 | return count; | |
2009 | } | |
adf653f9 | 2010 | __target_detach_tg_pt_gp(lun, tg_pt_gp); |
c66ac9db NB |
2011 | move = 1; |
2012 | } | |
adf653f9 CH |
2013 | |
2014 | __target_attach_tg_pt_gp(lun, tg_pt_gp_new); | |
2015 | spin_unlock(&lun->lun_tg_pt_gp_lock); | |
6708bb27 | 2016 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2017 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2018 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2019 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2020 | config_item_name(&lun->lun_group.cg_item), |
2021 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2022 | tg_pt_gp_new->tg_pt_gp_id); | |
2023 | ||
2024 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2025 | return count; | |
2026 | } | |
2027 | ||
2028 | ssize_t core_alua_show_access_type( | |
2029 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2030 | char *page) | |
2031 | { | |
125d0119 HR |
2032 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2033 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2034 | return sprintf(page, "Implicit and Explicit\n"); | |
2035 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2036 | return sprintf(page, "Implicit\n"); | |
2037 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2038 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2039 | else |
2040 | return sprintf(page, "None\n"); | |
2041 | } | |
2042 | ||
2043 | ssize_t core_alua_store_access_type( | |
2044 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2045 | const char *page, | |
2046 | size_t count) | |
2047 | { | |
2048 | unsigned long tmp; | |
2049 | int ret; | |
2050 | ||
57103d7f | 2051 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2052 | if (ret < 0) { |
6708bb27 | 2053 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2054 | return ret; |
c66ac9db NB |
2055 | } |
2056 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2057 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2058 | " %lu\n", tmp); |
2059 | return -EINVAL; | |
2060 | } | |
2061 | if (tmp == 3) | |
2062 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2063 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2064 | else if (tmp == 2) |
125d0119 | 2065 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2066 | else if (tmp == 1) |
125d0119 | 2067 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2068 | else |
2069 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2070 | ||
2071 | return count; | |
2072 | } | |
2073 | ||
2074 | ssize_t core_alua_show_nonop_delay_msecs( | |
2075 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2076 | char *page) | |
2077 | { | |
2078 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2079 | } | |
2080 | ||
2081 | ssize_t core_alua_store_nonop_delay_msecs( | |
2082 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2083 | const char *page, | |
2084 | size_t count) | |
2085 | { | |
2086 | unsigned long tmp; | |
2087 | int ret; | |
2088 | ||
57103d7f | 2089 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2090 | if (ret < 0) { |
6708bb27 | 2091 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2092 | return ret; |
c66ac9db NB |
2093 | } |
2094 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2095 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2096 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2097 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2098 | return -EINVAL; | |
2099 | } | |
2100 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2101 | ||
2102 | return count; | |
2103 | } | |
2104 | ||
2105 | ssize_t core_alua_show_trans_delay_msecs( | |
2106 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2107 | char *page) | |
2108 | { | |
2109 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2110 | } | |
2111 | ||
2112 | ssize_t core_alua_store_trans_delay_msecs( | |
2113 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2114 | const char *page, | |
2115 | size_t count) | |
2116 | { | |
2117 | unsigned long tmp; | |
2118 | int ret; | |
2119 | ||
57103d7f | 2120 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2121 | if (ret < 0) { |
6708bb27 | 2122 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2123 | return ret; |
c66ac9db NB |
2124 | } |
2125 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2126 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2127 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2128 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2129 | return -EINVAL; | |
2130 | } | |
2131 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2132 | ||
2133 | return count; | |
2134 | } | |
2135 | ||
125d0119 | 2136 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2137 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2138 | char *page) | |
2139 | { | |
125d0119 | 2140 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2141 | } |
2142 | ||
125d0119 | 2143 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2144 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2145 | const char *page, | |
2146 | size_t count) | |
2147 | { | |
2148 | unsigned long tmp; | |
2149 | int ret; | |
2150 | ||
57103d7f | 2151 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2152 | if (ret < 0) { |
125d0119 | 2153 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2154 | return ret; |
5b9a4d72 | 2155 | } |
125d0119 HR |
2156 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2157 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2158 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2159 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2160 | return -EINVAL; |
2161 | } | |
125d0119 | 2162 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2163 | |
2164 | return count; | |
2165 | } | |
2166 | ||
c66ac9db NB |
2167 | ssize_t core_alua_show_preferred_bit( |
2168 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2169 | char *page) | |
2170 | { | |
2171 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2172 | } | |
2173 | ||
2174 | ssize_t core_alua_store_preferred_bit( | |
2175 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2176 | const char *page, | |
2177 | size_t count) | |
2178 | { | |
2179 | unsigned long tmp; | |
2180 | int ret; | |
2181 | ||
57103d7f | 2182 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2183 | if (ret < 0) { |
6708bb27 | 2184 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2185 | return ret; |
c66ac9db NB |
2186 | } |
2187 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2188 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2189 | return -EINVAL; |
2190 | } | |
2191 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2192 | ||
2193 | return count; | |
2194 | } | |
2195 | ||
2196 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2197 | { | |
c66ac9db | 2198 | return sprintf(page, "%d\n", |
adf653f9 | 2199 | atomic_read(&lun->lun_tg_pt_secondary_offline)); |
c66ac9db NB |
2200 | } |
2201 | ||
2202 | ssize_t core_alua_store_offline_bit( | |
2203 | struct se_lun *lun, | |
2204 | const char *page, | |
2205 | size_t count) | |
2206 | { | |
4cc987ea NB |
2207 | /* |
2208 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
2209 | * reference to se_device->dev_group. | |
2210 | */ | |
2211 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db NB |
2212 | unsigned long tmp; |
2213 | int ret; | |
2214 | ||
adf653f9 CH |
2215 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH || |
2216 | (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
c66ac9db NB |
2217 | return -ENODEV; |
2218 | ||
57103d7f | 2219 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2220 | if (ret < 0) { |
6708bb27 | 2221 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2222 | return ret; |
c66ac9db NB |
2223 | } |
2224 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2225 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2226 | tmp); |
2227 | return -EINVAL; | |
2228 | } | |
c66ac9db | 2229 | |
adf653f9 | 2230 | ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp); |
c66ac9db NB |
2231 | if (ret < 0) |
2232 | return -EINVAL; | |
2233 | ||
2234 | return count; | |
2235 | } | |
2236 | ||
2237 | ssize_t core_alua_show_secondary_status( | |
2238 | struct se_lun *lun, | |
2239 | char *page) | |
2240 | { | |
adf653f9 | 2241 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat); |
c66ac9db NB |
2242 | } |
2243 | ||
2244 | ssize_t core_alua_store_secondary_status( | |
2245 | struct se_lun *lun, | |
2246 | const char *page, | |
2247 | size_t count) | |
2248 | { | |
2249 | unsigned long tmp; | |
2250 | int ret; | |
2251 | ||
57103d7f | 2252 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2253 | if (ret < 0) { |
6708bb27 | 2254 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2255 | return ret; |
c66ac9db NB |
2256 | } |
2257 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2258 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2259 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2260 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2261 | tmp); |
2262 | return -EINVAL; | |
2263 | } | |
adf653f9 | 2264 | lun->lun_tg_pt_secondary_stat = (int)tmp; |
c66ac9db NB |
2265 | |
2266 | return count; | |
2267 | } | |
2268 | ||
2269 | ssize_t core_alua_show_secondary_write_metadata( | |
2270 | struct se_lun *lun, | |
2271 | char *page) | |
2272 | { | |
adf653f9 | 2273 | return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md); |
c66ac9db NB |
2274 | } |
2275 | ||
2276 | ssize_t core_alua_store_secondary_write_metadata( | |
2277 | struct se_lun *lun, | |
2278 | const char *page, | |
2279 | size_t count) | |
2280 | { | |
2281 | unsigned long tmp; | |
2282 | int ret; | |
2283 | ||
57103d7f | 2284 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2285 | if (ret < 0) { |
6708bb27 | 2286 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2287 | return ret; |
c66ac9db NB |
2288 | } |
2289 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2290 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2291 | " %lu\n", tmp); |
2292 | return -EINVAL; | |
2293 | } | |
adf653f9 | 2294 | lun->lun_tg_pt_secondary_write_md = (int)tmp; |
c66ac9db NB |
2295 | |
2296 | return count; | |
2297 | } | |
2298 | ||
0fd97ccf | 2299 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2300 | { |
a3541703 | 2301 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && |
c87fbd56 CH |
2302 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2303 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2304 | |
c66ac9db | 2305 | /* |
25985edc | 2306 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2307 | * LUN Group. |
2308 | */ | |
2309 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2310 | if (IS_ERR(lu_gp_mem)) |
2311 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2312 | |
c66ac9db NB |
2313 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2314 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2315 | default_lu_gp); |
c66ac9db NB |
2316 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2317 | ||
6708bb27 | 2318 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2319 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2320 | dev->transport->name); |
c66ac9db NB |
2321 | } |
2322 | ||
2323 | return 0; | |
2324 | } |