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 NB |
45 | static int core_alua_set_tg_pt_secondary_state( |
46 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
125d0119 | 47 | struct se_port *port, int explicit, int offline); |
c66ac9db | 48 | |
bb91c1a0 HR |
49 | static char *core_alua_dump_state(int state); |
50 | ||
e3d6f909 AG |
51 | static u16 alua_lu_gps_counter; |
52 | static u32 alua_lu_gps_count; | |
53 | ||
54 | static DEFINE_SPINLOCK(lu_gps_lock); | |
55 | static LIST_HEAD(lu_gps_list); | |
56 | ||
57 | struct t10_alua_lu_gp *default_lu_gp; | |
58 | ||
c66094bf HR |
59 | /* |
60 | * REPORT REFERRALS | |
61 | * | |
62 | * See sbc3r35 section 5.23 | |
63 | */ | |
64 | sense_reason_t | |
65 | target_emulate_report_referrals(struct se_cmd *cmd) | |
66 | { | |
67 | struct se_device *dev = cmd->se_dev; | |
68 | struct t10_alua_lba_map *map; | |
69 | struct t10_alua_lba_map_member *map_mem; | |
70 | unsigned char *buf; | |
71 | u32 rd_len = 0, off; | |
72 | ||
73 | if (cmd->data_length < 4) { | |
74 | pr_warn("REPORT REFERRALS allocation length %u too" | |
75 | " small\n", cmd->data_length); | |
76 | return TCM_INVALID_CDB_FIELD; | |
77 | } | |
78 | ||
79 | buf = transport_kmap_data_sg(cmd); | |
80 | if (!buf) | |
81 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
82 | ||
83 | off = 4; | |
84 | spin_lock(&dev->t10_alua.lba_map_lock); | |
85 | if (list_empty(&dev->t10_alua.lba_map_list)) { | |
86 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
87 | transport_kunmap_data_sg(cmd); | |
88 | ||
89 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
90 | } | |
91 | ||
92 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
93 | lba_map_list) { | |
94 | int desc_num = off + 3; | |
95 | int pg_num; | |
96 | ||
97 | off += 4; | |
38edd724 HR |
98 | if (cmd->data_length > off) |
99 | put_unaligned_be64(map->lba_map_first_lba, &buf[off]); | |
c66094bf | 100 | off += 8; |
38edd724 HR |
101 | if (cmd->data_length > off) |
102 | put_unaligned_be64(map->lba_map_last_lba, &buf[off]); | |
c66094bf HR |
103 | off += 8; |
104 | rd_len += 20; | |
105 | pg_num = 0; | |
106 | list_for_each_entry(map_mem, &map->lba_map_mem_list, | |
107 | lba_map_mem_list) { | |
38edd724 HR |
108 | int alua_state = map_mem->lba_map_mem_alua_state; |
109 | int alua_pg_id = map_mem->lba_map_mem_alua_pg_id; | |
110 | ||
111 | if (cmd->data_length > off) | |
112 | buf[off] = alua_state & 0x0f; | |
113 | off += 2; | |
114 | if (cmd->data_length > off) | |
115 | buf[off] = (alua_pg_id >> 8) & 0xff; | |
116 | off++; | |
117 | if (cmd->data_length > off) | |
118 | buf[off] = (alua_pg_id & 0xff); | |
c66094bf | 119 | off++; |
c66094bf HR |
120 | rd_len += 4; |
121 | pg_num++; | |
122 | } | |
38edd724 HR |
123 | if (cmd->data_length > desc_num) |
124 | buf[desc_num] = pg_num; | |
c66094bf HR |
125 | } |
126 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
127 | ||
128 | /* | |
129 | * Set the RETURN DATA LENGTH set in the header of the DataIN Payload | |
130 | */ | |
131 | put_unaligned_be16(rd_len, &buf[2]); | |
132 | ||
133 | transport_kunmap_data_sg(cmd); | |
134 | ||
135 | target_complete_cmd(cmd, GOOD); | |
136 | return 0; | |
137 | } | |
138 | ||
c66ac9db NB |
139 | /* |
140 | * REPORT_TARGET_PORT_GROUPS | |
141 | * | |
142 | * See spc4r17 section 6.27 | |
143 | */ | |
de103c93 CH |
144 | sense_reason_t |
145 | target_emulate_report_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 146 | { |
0fd97ccf | 147 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
148 | struct se_port *port; |
149 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
150 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
05d1c7c0 | 151 | unsigned char *buf; |
5b9a4d72 NB |
152 | u32 rd_len = 0, off; |
153 | int ext_hdr = (cmd->t_task_cdb[1] & 0x20); | |
de103c93 | 154 | |
6b20fa9a | 155 | /* |
5b9a4d72 NB |
156 | * Skip over RESERVED area to first Target port group descriptor |
157 | * depending on the PARAMETER DATA FORMAT type.. | |
6b20fa9a | 158 | */ |
5b9a4d72 NB |
159 | if (ext_hdr != 0) |
160 | off = 8; | |
161 | else | |
162 | off = 4; | |
163 | ||
164 | if (cmd->data_length < off) { | |
165 | pr_warn("REPORT TARGET PORT GROUPS allocation length %u too" | |
166 | " small for %s header\n", cmd->data_length, | |
167 | (ext_hdr) ? "extended" : "normal"); | |
de103c93 | 168 | return TCM_INVALID_CDB_FIELD; |
6b20fa9a | 169 | } |
4949314c | 170 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
171 | if (!buf) |
172 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 173 | |
0fd97ccf CH |
174 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
175 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 176 | tg_pt_gp_list) { |
6b20fa9a NB |
177 | /* |
178 | * Check if the Target port group and Target port descriptor list | |
179 | * based on tg_pt_gp_members count will fit into the response payload. | |
180 | * Otherwise, bump rd_len to let the initiator know we have exceeded | |
181 | * the allocation length and the response is truncated. | |
182 | */ | |
183 | if ((off + 8 + (tg_pt_gp->tg_pt_gp_members * 4)) > | |
184 | cmd->data_length) { | |
185 | rd_len += 8 + (tg_pt_gp->tg_pt_gp_members * 4); | |
186 | continue; | |
187 | } | |
c66ac9db NB |
188 | /* |
189 | * PREF: Preferred target port bit, determine if this | |
190 | * bit should be set for port group. | |
191 | */ | |
192 | if (tg_pt_gp->tg_pt_gp_pref) | |
193 | buf[off] = 0x80; | |
194 | /* | |
195 | * Set the ASYMMETRIC ACCESS State | |
196 | */ | |
197 | buf[off++] |= (atomic_read( | |
198 | &tg_pt_gp->tg_pt_gp_alua_access_state) & 0xff); | |
199 | /* | |
200 | * Set supported ASYMMETRIC ACCESS State bits | |
201 | */ | |
c0dc941e | 202 | buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db NB |
203 | /* |
204 | * TARGET PORT GROUP | |
205 | */ | |
206 | buf[off++] = ((tg_pt_gp->tg_pt_gp_id >> 8) & 0xff); | |
207 | buf[off++] = (tg_pt_gp->tg_pt_gp_id & 0xff); | |
208 | ||
209 | off++; /* Skip over Reserved */ | |
210 | /* | |
211 | * STATUS CODE | |
212 | */ | |
213 | buf[off++] = (tg_pt_gp->tg_pt_gp_alua_access_status & 0xff); | |
214 | /* | |
215 | * Vendor Specific field | |
216 | */ | |
217 | buf[off++] = 0x00; | |
218 | /* | |
219 | * TARGET PORT COUNT | |
220 | */ | |
221 | buf[off++] = (tg_pt_gp->tg_pt_gp_members & 0xff); | |
222 | rd_len += 8; | |
223 | ||
224 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
225 | list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, | |
226 | tg_pt_gp_mem_list) { | |
227 | port = tg_pt_gp_mem->tg_pt; | |
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 | */ | |
237 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
238 | buf[off++] = (port->sep_rtpi & 0xff); | |
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 | */ | |
262 | port = cmd->se_lun->lun_sep; | |
263 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
264 | if (tg_pt_gp_mem) { | |
265 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
266 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
267 | if (tg_pt_gp) | |
125d0119 | 268 | buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs; |
5b9a4d72 NB |
269 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
270 | } | |
271 | } | |
4949314c | 272 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 273 | |
6bb35e00 | 274 | target_complete_cmd(cmd, GOOD); |
c66ac9db NB |
275 | return 0; |
276 | } | |
277 | ||
278 | /* | |
125d0119 | 279 | * SET_TARGET_PORT_GROUPS for explicit ALUA operation. |
c66ac9db NB |
280 | * |
281 | * See spc4r17 section 6.35 | |
282 | */ | |
de103c93 CH |
283 | sense_reason_t |
284 | target_emulate_set_target_port_groups(struct se_cmd *cmd) | |
c66ac9db | 285 | { |
5951146d | 286 | struct se_device *dev = cmd->se_dev; |
e3d6f909 AG |
287 | struct se_port *port, *l_port = cmd->se_lun->lun_sep; |
288 | struct se_node_acl *nacl = cmd->se_sess->se_node_acl; | |
c66ac9db NB |
289 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp; |
290 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem; | |
05d1c7c0 AG |
291 | unsigned char *buf; |
292 | unsigned char *ptr; | |
a0d50f62 | 293 | sense_reason_t rc = TCM_NO_SENSE; |
c66ac9db | 294 | u32 len = 4; /* Skip over RESERVED area in header */ |
bb91c1a0 | 295 | int alua_access_state, primary = 0, valid_states; |
c66ac9db NB |
296 | u16 tg_pt_id, rtpi; |
297 | ||
de103c93 CH |
298 | if (!l_port) |
299 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
300 | ||
0d7f1299 PB |
301 | if (cmd->data_length < 4) { |
302 | pr_warn("SET TARGET PORT GROUPS parameter list length %u too" | |
303 | " small\n", cmd->data_length); | |
de103c93 | 304 | return TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
305 | } |
306 | ||
4949314c | 307 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
308 | if (!buf) |
309 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 310 | |
c66ac9db | 311 | /* |
125d0119 | 312 | * Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed |
c66ac9db NB |
313 | * for the local tg_pt_gp. |
314 | */ | |
315 | l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem; | |
6708bb27 AG |
316 | if (!l_tg_pt_gp_mem) { |
317 | pr_err("Unable to access l_port->sep_alua_tg_pt_gp_mem\n"); | |
de103c93 | 318 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 319 | goto out; |
c66ac9db NB |
320 | } |
321 | spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
322 | l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 323 | if (!l_tg_pt_gp) { |
c66ac9db | 324 | spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
6708bb27 | 325 | pr_err("Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n"); |
de103c93 | 326 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 327 | goto out; |
c66ac9db | 328 | } |
c66ac9db NB |
329 | spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock); |
330 | ||
125d0119 | 331 | if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { |
6708bb27 | 332 | pr_debug("Unable to process SET_TARGET_PORT_GROUPS" |
125d0119 | 333 | " while TPGS_EXPLICIT_ALUA is disabled\n"); |
de103c93 | 334 | rc = TCM_UNSUPPORTED_SCSI_OPCODE; |
05d1c7c0 | 335 | goto out; |
c66ac9db | 336 | } |
bb91c1a0 | 337 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
c66ac9db | 338 | |
05d1c7c0 AG |
339 | ptr = &buf[4]; /* Skip over RESERVED area in header */ |
340 | ||
c66ac9db | 341 | while (len < cmd->data_length) { |
de103c93 | 342 | bool found = false; |
c66ac9db NB |
343 | alua_access_state = (ptr[0] & 0x0f); |
344 | /* | |
345 | * Check the received ALUA access state, and determine if | |
346 | * the state is a primary or secondary target port asymmetric | |
347 | * access state. | |
348 | */ | |
bb91c1a0 HR |
349 | rc = core_alua_check_transition(alua_access_state, |
350 | valid_states, &primary); | |
de103c93 | 351 | if (rc) { |
c66ac9db NB |
352 | /* |
353 | * If the SET TARGET PORT GROUPS attempts to establish | |
354 | * an invalid combination of target port asymmetric | |
355 | * access states or attempts to establish an | |
356 | * unsupported target port asymmetric access state, | |
357 | * then the command shall be terminated with CHECK | |
358 | * CONDITION status, with the sense key set to ILLEGAL | |
359 | * REQUEST, and the additional sense code set to INVALID | |
360 | * FIELD IN PARAMETER LIST. | |
361 | */ | |
05d1c7c0 | 362 | goto out; |
c66ac9db | 363 | } |
de103c93 | 364 | |
c66ac9db NB |
365 | /* |
366 | * If the ASYMMETRIC ACCESS STATE field (see table 267) | |
367 | * specifies a primary target port asymmetric access state, | |
368 | * then the TARGET PORT GROUP OR TARGET PORT field specifies | |
369 | * a primary target port group for which the primary target | |
370 | * port asymmetric access state shall be changed. If the | |
371 | * ASYMMETRIC ACCESS STATE field specifies a secondary target | |
372 | * port asymmetric access state, then the TARGET PORT GROUP OR | |
373 | * TARGET PORT field specifies the relative target port | |
374 | * identifier (see 3.1.120) of the target port for which the | |
375 | * secondary target port asymmetric access state shall be | |
376 | * changed. | |
377 | */ | |
378 | if (primary) { | |
33395fb8 | 379 | tg_pt_id = get_unaligned_be16(ptr + 2); |
c66ac9db NB |
380 | /* |
381 | * Locate the matching target port group ID from | |
382 | * the global tg_pt_gp list | |
383 | */ | |
0fd97ccf | 384 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 385 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 386 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db | 387 | tg_pt_gp_list) { |
6708bb27 | 388 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
389 | continue; |
390 | ||
391 | if (tg_pt_id != tg_pt_gp->tg_pt_gp_id) | |
392 | continue; | |
393 | ||
33940d09 | 394 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
de103c93 | 395 | |
0fd97ccf | 396 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 397 | |
de103c93 | 398 | if (!core_alua_do_port_transition(tg_pt_gp, |
c66ac9db | 399 | dev, l_port, nacl, |
de103c93 CH |
400 | alua_access_state, 1)) |
401 | found = true; | |
c66ac9db | 402 | |
0fd97ccf | 403 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 404 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
c66ac9db NB |
405 | break; |
406 | } | |
0fd97ccf | 407 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
408 | } else { |
409 | /* | |
f1ae05d5 | 410 | * Extract the RELATIVE TARGET PORT IDENTIFIER to identify |
c66ac9db NB |
411 | * the Target Port in question for the the incoming |
412 | * SET_TARGET_PORT_GROUPS op. | |
413 | */ | |
33395fb8 | 414 | rtpi = get_unaligned_be16(ptr + 2); |
c66ac9db | 415 | /* |
35d1efe8 | 416 | * Locate the matching relative target port identifier |
c66ac9db NB |
417 | * for the struct se_device storage object. |
418 | */ | |
419 | spin_lock(&dev->se_port_lock); | |
420 | list_for_each_entry(port, &dev->dev_sep_list, | |
421 | sep_list) { | |
422 | if (port->sep_rtpi != rtpi) | |
423 | continue; | |
424 | ||
425 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
de103c93 | 426 | |
c66ac9db NB |
427 | spin_unlock(&dev->se_port_lock); |
428 | ||
de103c93 CH |
429 | if (!core_alua_set_tg_pt_secondary_state( |
430 | tg_pt_gp_mem, port, 1, 1)) | |
431 | found = true; | |
c66ac9db NB |
432 | |
433 | spin_lock(&dev->se_port_lock); | |
434 | break; | |
435 | } | |
436 | spin_unlock(&dev->se_port_lock); | |
de103c93 CH |
437 | } |
438 | ||
439 | if (!found) { | |
440 | rc = TCM_INVALID_PARAMETER_LIST; | |
441 | goto out; | |
c66ac9db NB |
442 | } |
443 | ||
444 | ptr += 4; | |
445 | len += 4; | |
446 | } | |
447 | ||
05d1c7c0 | 448 | out: |
4949314c | 449 | transport_kunmap_data_sg(cmd); |
59e4f541 RD |
450 | if (!rc) |
451 | target_complete_cmd(cmd, GOOD); | |
452 | return rc; | |
c66ac9db NB |
453 | } |
454 | ||
1e3ab99d PB |
455 | static inline void set_ascq(struct se_cmd *cmd, u8 alua_ascq) |
456 | { | |
457 | /* | |
458 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
459 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
460 | * by the ALUA primary or secondary access state.. | |
461 | */ | |
462 | pr_debug("[%s]: ALUA TG Port not available, " | |
463 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
464 | "0x04/0x%02x\n", | |
465 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
466 | ||
467 | cmd->scsi_asc = 0x04; | |
468 | cmd->scsi_ascq = alua_ascq; | |
469 | } | |
470 | ||
471 | static inline void core_alua_state_nonoptimized( | |
c66ac9db NB |
472 | struct se_cmd *cmd, |
473 | unsigned char *cdb, | |
1e3ab99d | 474 | int nonop_delay_msecs) |
c66ac9db NB |
475 | { |
476 | /* | |
477 | * Set SCF_ALUA_NON_OPTIMIZED here, this value will be checked | |
478 | * later to determine if processing of this cmd needs to be | |
479 | * temporarily delayed for the Active/NonOptimized primary access state. | |
480 | */ | |
481 | cmd->se_cmd_flags |= SCF_ALUA_NON_OPTIMIZED; | |
482 | cmd->alua_nonop_delay = nonop_delay_msecs; | |
c66ac9db NB |
483 | } |
484 | ||
c66094bf HR |
485 | static inline int core_alua_state_lba_dependent( |
486 | struct se_cmd *cmd, | |
1e3ab99d | 487 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66094bf HR |
488 | { |
489 | struct se_device *dev = cmd->se_dev; | |
490 | u64 segment_size, segment_mult, sectors, lba; | |
491 | ||
492 | /* Only need to check for cdb actually containing LBAs */ | |
493 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB)) | |
494 | return 0; | |
495 | ||
496 | spin_lock(&dev->t10_alua.lba_map_lock); | |
497 | segment_size = dev->t10_alua.lba_map_segment_size; | |
498 | segment_mult = dev->t10_alua.lba_map_segment_multiplier; | |
499 | sectors = cmd->data_length / dev->dev_attrib.block_size; | |
500 | ||
501 | lba = cmd->t_task_lba; | |
502 | while (lba < cmd->t_task_lba + sectors) { | |
503 | struct t10_alua_lba_map *cur_map = NULL, *map; | |
504 | struct t10_alua_lba_map_member *map_mem; | |
505 | ||
506 | list_for_each_entry(map, &dev->t10_alua.lba_map_list, | |
507 | lba_map_list) { | |
508 | u64 start_lba, last_lba; | |
509 | u64 first_lba = map->lba_map_first_lba; | |
510 | ||
511 | if (segment_mult) { | |
512 | u64 tmp = lba; | |
cdf55949 | 513 | start_lba = do_div(tmp, segment_size * segment_mult); |
c66094bf HR |
514 | |
515 | last_lba = first_lba + segment_size - 1; | |
516 | if (start_lba >= first_lba && | |
517 | start_lba <= last_lba) { | |
518 | lba += segment_size; | |
519 | cur_map = map; | |
520 | break; | |
521 | } | |
522 | } else { | |
523 | last_lba = map->lba_map_last_lba; | |
524 | if (lba >= first_lba && lba <= last_lba) { | |
525 | lba = last_lba + 1; | |
526 | cur_map = map; | |
527 | break; | |
528 | } | |
529 | } | |
530 | } | |
531 | if (!cur_map) { | |
532 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 533 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
534 | return 1; |
535 | } | |
536 | list_for_each_entry(map_mem, &cur_map->lba_map_mem_list, | |
537 | lba_map_mem_list) { | |
538 | if (map_mem->lba_map_mem_alua_pg_id != | |
539 | tg_pt_gp->tg_pt_gp_id) | |
540 | continue; | |
541 | switch(map_mem->lba_map_mem_alua_state) { | |
542 | case ALUA_ACCESS_STATE_STANDBY: | |
543 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 544 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66094bf HR |
545 | return 1; |
546 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
547 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1e3ab99d | 548 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66094bf HR |
549 | return 1; |
550 | default: | |
551 | break; | |
552 | } | |
553 | } | |
554 | } | |
555 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
556 | return 0; | |
557 | } | |
558 | ||
c66ac9db NB |
559 | static inline int core_alua_state_standby( |
560 | struct se_cmd *cmd, | |
1e3ab99d | 561 | unsigned char *cdb) |
c66ac9db NB |
562 | { |
563 | /* | |
564 | * Allowed CDBs for ALUA_ACCESS_STATE_STANDBY as defined by | |
565 | * spc4r17 section 5.9.2.4.4 | |
566 | */ | |
567 | switch (cdb[0]) { | |
568 | case INQUIRY: | |
569 | case LOG_SELECT: | |
570 | case LOG_SENSE: | |
571 | case MODE_SELECT: | |
572 | case MODE_SENSE: | |
573 | case REPORT_LUNS: | |
574 | case RECEIVE_DIAGNOSTIC: | |
575 | case SEND_DIAGNOSTIC: | |
e7810c2d | 576 | case READ_CAPACITY: |
30f359a6 | 577 | return 0; |
eb846d9f | 578 | case SERVICE_ACTION_IN_16: |
e7810c2d NB |
579 | switch (cdb[1] & 0x1f) { |
580 | case SAI_READ_CAPACITY_16: | |
581 | return 0; | |
582 | default: | |
583 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); | |
584 | return 1; | |
585 | } | |
c66ac9db | 586 | case MAINTENANCE_IN: |
ba539743 | 587 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
588 | case MI_REPORT_TARGET_PGS: |
589 | return 0; | |
590 | default: | |
1e3ab99d | 591 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
592 | return 1; |
593 | } | |
594 | case MAINTENANCE_OUT: | |
595 | switch (cdb[1]) { | |
596 | case MO_SET_TARGET_PGS: | |
597 | return 0; | |
598 | default: | |
1e3ab99d | 599 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
600 | return 1; |
601 | } | |
602 | case REQUEST_SENSE: | |
603 | case PERSISTENT_RESERVE_IN: | |
604 | case PERSISTENT_RESERVE_OUT: | |
605 | case READ_BUFFER: | |
606 | case WRITE_BUFFER: | |
607 | return 0; | |
608 | default: | |
1e3ab99d | 609 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_STANDBY); |
c66ac9db NB |
610 | return 1; |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | static inline int core_alua_state_unavailable( | |
617 | struct se_cmd *cmd, | |
1e3ab99d | 618 | unsigned char *cdb) |
c66ac9db NB |
619 | { |
620 | /* | |
621 | * Allowed CDBs for ALUA_ACCESS_STATE_UNAVAILABLE as defined by | |
622 | * spc4r17 section 5.9.2.4.5 | |
623 | */ | |
624 | switch (cdb[0]) { | |
625 | case INQUIRY: | |
626 | case REPORT_LUNS: | |
30f359a6 | 627 | return 0; |
c66ac9db | 628 | case MAINTENANCE_IN: |
ba539743 | 629 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
630 | case MI_REPORT_TARGET_PGS: |
631 | return 0; | |
632 | default: | |
1e3ab99d | 633 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
634 | return 1; |
635 | } | |
636 | case MAINTENANCE_OUT: | |
637 | switch (cdb[1]) { | |
638 | case MO_SET_TARGET_PGS: | |
639 | return 0; | |
640 | default: | |
1e3ab99d | 641 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
642 | return 1; |
643 | } | |
644 | case REQUEST_SENSE: | |
645 | case READ_BUFFER: | |
646 | case WRITE_BUFFER: | |
647 | return 0; | |
648 | default: | |
1e3ab99d | 649 | set_ascq(cmd, ASCQ_04H_ALUA_TG_PT_UNAVAILABLE); |
c66ac9db NB |
650 | return 1; |
651 | } | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
656 | static inline int core_alua_state_transition( | |
657 | struct se_cmd *cmd, | |
1e3ab99d | 658 | unsigned char *cdb) |
c66ac9db NB |
659 | { |
660 | /* | |
f1ae05d5 | 661 | * Allowed CDBs for ALUA_ACCESS_STATE_TRANSITION as defined by |
c66ac9db NB |
662 | * spc4r17 section 5.9.2.5 |
663 | */ | |
664 | switch (cdb[0]) { | |
665 | case INQUIRY: | |
666 | case REPORT_LUNS: | |
30f359a6 | 667 | return 0; |
c66ac9db | 668 | case MAINTENANCE_IN: |
ba539743 | 669 | switch (cdb[1] & 0x1f) { |
c66ac9db NB |
670 | case MI_REPORT_TARGET_PGS: |
671 | return 0; | |
672 | default: | |
1e3ab99d | 673 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
674 | return 1; |
675 | } | |
676 | case REQUEST_SENSE: | |
677 | case READ_BUFFER: | |
678 | case WRITE_BUFFER: | |
679 | return 0; | |
680 | default: | |
1e3ab99d | 681 | set_ascq(cmd, ASCQ_04H_ALUA_STATE_TRANSITION); |
c66ac9db NB |
682 | return 1; |
683 | } | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | /* | |
f1ae05d5 | 689 | * return 1: Is used to signal LUN not accessible, and check condition/not ready |
c66ac9db | 690 | * return 0: Used to signal success |
f1ae05d5 | 691 | * return -1: Used to signal failure, and invalid cdb field |
c66ac9db | 692 | */ |
de103c93 CH |
693 | sense_reason_t |
694 | target_alua_state_check(struct se_cmd *cmd) | |
c66ac9db | 695 | { |
c87fbd56 CH |
696 | struct se_device *dev = cmd->se_dev; |
697 | unsigned char *cdb = cmd->t_task_cdb; | |
e3d6f909 | 698 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
699 | struct se_port *port = lun->lun_sep; |
700 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
701 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
702 | int out_alua_state, nonop_delay_msecs; | |
c87fbd56 CH |
703 | |
704 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
705 | return 0; | |
a3541703 | 706 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
c87fbd56 | 707 | return 0; |
c66ac9db | 708 | |
6708bb27 | 709 | if (!port) |
c66ac9db NB |
710 | return 0; |
711 | /* | |
712 | * First, check for a struct se_port specific secondary ALUA target port | |
713 | * access state: OFFLINE | |
714 | */ | |
715 | if (atomic_read(&port->sep_tg_pt_secondary_offline)) { | |
6708bb27 | 716 | pr_debug("ALUA: Got secondary offline status for local" |
c66ac9db | 717 | " target port\n"); |
1e3ab99d PB |
718 | set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE); |
719 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66ac9db NB |
720 | } |
721 | /* | |
722 | * Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the | |
723 | * ALUA target port group, to obtain current ALUA access state. | |
724 | * Otherwise look for the underlying struct se_device association with | |
725 | * a ALUA logical unit group. | |
726 | */ | |
727 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
89c12cc9 NB |
728 | if (!tg_pt_gp_mem) |
729 | return 0; | |
730 | ||
c66ac9db NB |
731 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
732 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
733 | out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
734 | nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs; | |
735 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
736 | /* | |
73f3bf51 | 737 | * Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional |
25985edc | 738 | * statement so the compiler knows explicitly to check this case first. |
c66ac9db NB |
739 | * For the Optimized ALUA access state case, we want to process the |
740 | * incoming fabric cmd ASAP.. | |
741 | */ | |
73f3bf51 | 742 | if (out_alua_state == ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED) |
c66ac9db NB |
743 | return 0; |
744 | ||
745 | switch (out_alua_state) { | |
746 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
1e3ab99d | 747 | core_alua_state_nonoptimized(cmd, cdb, nonop_delay_msecs); |
c87fbd56 | 748 | break; |
c66ac9db | 749 | case ALUA_ACCESS_STATE_STANDBY: |
1e3ab99d PB |
750 | if (core_alua_state_standby(cmd, cdb)) |
751 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 752 | break; |
c66ac9db | 753 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
1e3ab99d PB |
754 | if (core_alua_state_unavailable(cmd, cdb)) |
755 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 756 | break; |
c66ac9db | 757 | case ALUA_ACCESS_STATE_TRANSITION: |
1e3ab99d PB |
758 | if (core_alua_state_transition(cmd, cdb)) |
759 | return TCM_CHECK_CONDITION_NOT_READY; | |
c87fbd56 | 760 | break; |
c66094bf | 761 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
1e3ab99d PB |
762 | if (core_alua_state_lba_dependent(cmd, tg_pt_gp)) |
763 | return TCM_CHECK_CONDITION_NOT_READY; | |
c66094bf | 764 | break; |
c66ac9db NB |
765 | /* |
766 | * OFFLINE is a secondary ALUA target port group access state, that is | |
767 | * handled above with struct se_port->sep_tg_pt_secondary_offline=1 | |
768 | */ | |
769 | case ALUA_ACCESS_STATE_OFFLINE: | |
770 | default: | |
6708bb27 | 771 | pr_err("Unknown ALUA access state: 0x%02x\n", |
c66ac9db | 772 | out_alua_state); |
de103c93 | 773 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
774 | } |
775 | ||
de103c93 | 776 | return 0; |
c66ac9db NB |
777 | } |
778 | ||
779 | /* | |
125d0119 | 780 | * Check implicit and explicit ALUA state change request. |
c66ac9db | 781 | */ |
de103c93 | 782 | static sense_reason_t |
bb91c1a0 | 783 | core_alua_check_transition(int state, int valid, int *primary) |
c66ac9db | 784 | { |
bb91c1a0 HR |
785 | /* |
786 | * OPTIMIZED, NON-OPTIMIZED, STANDBY and UNAVAILABLE are | |
787 | * defined as primary target port asymmetric access states. | |
788 | */ | |
c66ac9db | 789 | switch (state) { |
73f3bf51 | 790 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
bb91c1a0 HR |
791 | if (!(valid & ALUA_AO_SUP)) |
792 | goto not_supported; | |
793 | *primary = 1; | |
794 | break; | |
c66ac9db | 795 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: |
bb91c1a0 HR |
796 | if (!(valid & ALUA_AN_SUP)) |
797 | goto not_supported; | |
798 | *primary = 1; | |
799 | break; | |
c66ac9db | 800 | case ALUA_ACCESS_STATE_STANDBY: |
bb91c1a0 HR |
801 | if (!(valid & ALUA_S_SUP)) |
802 | goto not_supported; | |
803 | *primary = 1; | |
804 | break; | |
c66ac9db | 805 | case ALUA_ACCESS_STATE_UNAVAILABLE: |
bb91c1a0 HR |
806 | if (!(valid & ALUA_U_SUP)) |
807 | goto not_supported; | |
c66ac9db NB |
808 | *primary = 1; |
809 | break; | |
c66094bf HR |
810 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
811 | if (!(valid & ALUA_LBD_SUP)) | |
812 | goto not_supported; | |
813 | *primary = 1; | |
814 | break; | |
c66ac9db NB |
815 | case ALUA_ACCESS_STATE_OFFLINE: |
816 | /* | |
817 | * OFFLINE state is defined as a secondary target port | |
818 | * asymmetric access state. | |
819 | */ | |
bb91c1a0 HR |
820 | if (!(valid & ALUA_O_SUP)) |
821 | goto not_supported; | |
c66ac9db NB |
822 | *primary = 0; |
823 | break; | |
bb91c1a0 HR |
824 | case ALUA_ACCESS_STATE_TRANSITION: |
825 | /* | |
826 | * Transitioning is set internally, and | |
827 | * cannot be selected manually. | |
828 | */ | |
829 | goto not_supported; | |
c66ac9db | 830 | default: |
6708bb27 | 831 | pr_err("Unknown ALUA access state: 0x%02x\n", state); |
de103c93 | 832 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
833 | } |
834 | ||
835 | return 0; | |
bb91c1a0 HR |
836 | |
837 | not_supported: | |
838 | pr_err("ALUA access state %s not supported", | |
839 | core_alua_dump_state(state)); | |
840 | return TCM_INVALID_PARAMETER_LIST; | |
c66ac9db NB |
841 | } |
842 | ||
843 | static char *core_alua_dump_state(int state) | |
844 | { | |
845 | switch (state) { | |
73f3bf51 | 846 | case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: |
c66ac9db NB |
847 | return "Active/Optimized"; |
848 | case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: | |
849 | return "Active/NonOptimized"; | |
c66094bf HR |
850 | case ALUA_ACCESS_STATE_LBA_DEPENDENT: |
851 | return "LBA Dependent"; | |
c66ac9db NB |
852 | case ALUA_ACCESS_STATE_STANDBY: |
853 | return "Standby"; | |
854 | case ALUA_ACCESS_STATE_UNAVAILABLE: | |
855 | return "Unavailable"; | |
856 | case ALUA_ACCESS_STATE_OFFLINE: | |
857 | return "Offline"; | |
bb91c1a0 HR |
858 | case ALUA_ACCESS_STATE_TRANSITION: |
859 | return "Transitioning"; | |
c66ac9db NB |
860 | default: |
861 | return "Unknown"; | |
862 | } | |
863 | ||
864 | return NULL; | |
865 | } | |
866 | ||
867 | char *core_alua_dump_status(int status) | |
868 | { | |
869 | switch (status) { | |
870 | case ALUA_STATUS_NONE: | |
871 | return "None"; | |
125d0119 HR |
872 | case ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG: |
873 | return "Altered by Explicit STPG"; | |
874 | case ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA: | |
875 | return "Altered by Implicit ALUA"; | |
c66ac9db NB |
876 | default: |
877 | return "Unknown"; | |
878 | } | |
879 | ||
880 | return NULL; | |
881 | } | |
882 | ||
883 | /* | |
884 | * Used by fabric modules to determine when we need to delay processing | |
885 | * for the Active/NonOptimized paths.. | |
886 | */ | |
887 | int core_alua_check_nonop_delay( | |
888 | struct se_cmd *cmd) | |
889 | { | |
890 | if (!(cmd->se_cmd_flags & SCF_ALUA_NON_OPTIMIZED)) | |
891 | return 0; | |
892 | if (in_interrupt()) | |
893 | return 0; | |
894 | /* | |
895 | * The ALUA Active/NonOptimized access state delay can be disabled | |
896 | * in via configfs with a value of zero | |
897 | */ | |
6708bb27 | 898 | if (!cmd->alua_nonop_delay) |
c66ac9db NB |
899 | return 0; |
900 | /* | |
901 | * struct se_cmd->alua_nonop_delay gets set by a target port group | |
902 | * defined interval in core_alua_state_nonoptimized() | |
903 | */ | |
904 | msleep_interruptible(cmd->alua_nonop_delay); | |
905 | return 0; | |
906 | } | |
907 | EXPORT_SYMBOL(core_alua_check_nonop_delay); | |
908 | ||
909 | /* | |
910 | * Called with tg_pt_gp->tg_pt_gp_md_mutex or tg_pt_gp_mem->sep_tg_pt_md_mutex | |
911 | * | |
912 | */ | |
913 | static int core_alua_write_tpg_metadata( | |
914 | const char *path, | |
915 | unsigned char *md_buf, | |
916 | u32 md_buf_len) | |
917 | { | |
0e9b10a9 AV |
918 | struct file *file = filp_open(path, O_RDWR | O_CREAT | O_TRUNC, 0600); |
919 | int ret; | |
c66ac9db | 920 | |
0e9b10a9 AV |
921 | if (IS_ERR(file)) { |
922 | pr_err("filp_open(%s) for ALUA metadata failed\n", path); | |
c66ac9db NB |
923 | return -ENODEV; |
924 | } | |
0e9b10a9 AV |
925 | ret = kernel_write(file, md_buf, md_buf_len, 0); |
926 | if (ret < 0) | |
6708bb27 | 927 | pr_err("Error writing ALUA metadata file: %s\n", path); |
0e9b10a9 | 928 | fput(file); |
f730f915 | 929 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
930 | } |
931 | ||
932 | /* | |
933 | * Called with tg_pt_gp->tg_pt_gp_md_mutex held | |
934 | */ | |
935 | static int core_alua_update_tpg_primary_metadata( | |
9c6e164c | 936 | struct t10_alua_tg_pt_gp *tg_pt_gp) |
c66ac9db | 937 | { |
1e0b9403 | 938 | unsigned char *md_buf; |
0fd97ccf | 939 | struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn; |
c66ac9db | 940 | char path[ALUA_METADATA_PATH_LEN]; |
1e0b9403 HR |
941 | int len, rc; |
942 | ||
943 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
944 | if (!md_buf) { | |
945 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
946 | return -ENOMEM; | |
947 | } | |
c66ac9db NB |
948 | |
949 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
950 | ||
1e0b9403 | 951 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, |
c66ac9db NB |
952 | "tg_pt_gp_id=%hu\n" |
953 | "alua_access_state=0x%02x\n" | |
954 | "alua_access_status=0x%02x\n", | |
9c6e164c HR |
955 | tg_pt_gp->tg_pt_gp_id, |
956 | tg_pt_gp->tg_pt_gp_alua_pending_state, | |
c66ac9db NB |
957 | tg_pt_gp->tg_pt_gp_alua_access_status); |
958 | ||
959 | snprintf(path, ALUA_METADATA_PATH_LEN, | |
960 | "/var/target/alua/tpgs_%s/%s", &wwn->unit_serial[0], | |
961 | config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item)); | |
962 | ||
1e0b9403 HR |
963 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
964 | kfree(md_buf); | |
965 | return rc; | |
c66ac9db NB |
966 | } |
967 | ||
9c6e164c | 968 | static void core_alua_do_transition_tg_pt_work(struct work_struct *work) |
c66ac9db | 969 | { |
9c6e164c HR |
970 | struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(work, |
971 | struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work); | |
972 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
c66ac9db NB |
973 | struct se_dev_entry *se_deve; |
974 | struct se_lun_acl *lacl; | |
975 | struct se_port *port; | |
976 | struct t10_alua_tg_pt_gp_member *mem; | |
9c6e164c HR |
977 | bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status == |
978 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG); | |
c66ac9db NB |
979 | |
980 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
981 | list_for_each_entry(mem, &tg_pt_gp->tg_pt_gp_mem_list, | |
982 | tg_pt_gp_mem_list) { | |
983 | port = mem->tg_pt; | |
984 | /* | |
985 | * After an implicit target port asymmetric access state | |
986 | * change, a device server shall establish a unit attention | |
987 | * condition for the initiator port associated with every I_T | |
988 | * nexus with the additional sense code set to ASYMMETRIC | |
f1ae05d5 | 989 | * ACCESS STATE CHANGED. |
c66ac9db NB |
990 | * |
991 | * After an explicit target port asymmetric access state | |
992 | * change, a device server shall establish a unit attention | |
993 | * condition with the additional sense code set to ASYMMETRIC | |
994 | * ACCESS STATE CHANGED for the initiator port associated with | |
995 | * every I_T nexus other than the I_T nexus on which the SET | |
996 | * TARGET PORT GROUPS command | |
997 | */ | |
33940d09 | 998 | atomic_inc_mb(&mem->tg_pt_gp_mem_ref_cnt); |
c66ac9db NB |
999 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); |
1000 | ||
1001 | spin_lock_bh(&port->sep_alua_lock); | |
1002 | list_for_each_entry(se_deve, &port->sep_alua_list, | |
1003 | alua_port_list) { | |
29a05dee NB |
1004 | lacl = rcu_dereference_check(se_deve->se_lun_acl, |
1005 | lockdep_is_held(&port->sep_alua_lock)); | |
c66ac9db NB |
1006 | /* |
1007 | * se_deve->se_lun_acl pointer may be NULL for a | |
125d0119 | 1008 | * entry created without explicit Node+MappedLUN ACLs |
c66ac9db | 1009 | */ |
6708bb27 | 1010 | if (!lacl) |
c66ac9db NB |
1011 | continue; |
1012 | ||
9c6e164c HR |
1013 | if ((tg_pt_gp->tg_pt_gp_alua_access_status == |
1014 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && | |
1015 | (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) && | |
1016 | (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl) && | |
1017 | (tg_pt_gp->tg_pt_gp_alua_port != NULL) && | |
1018 | (tg_pt_gp->tg_pt_gp_alua_port == port)) | |
c66ac9db NB |
1019 | continue; |
1020 | ||
1021 | core_scsi3_ua_allocate(lacl->se_lun_nacl, | |
1022 | se_deve->mapped_lun, 0x2A, | |
1023 | ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED); | |
1024 | } | |
1025 | spin_unlock_bh(&port->sep_alua_lock); | |
1026 | ||
1027 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
33940d09 | 1028 | atomic_dec_mb(&mem->tg_pt_gp_mem_ref_cnt); |
c66ac9db NB |
1029 | } |
1030 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1031 | /* | |
1032 | * Update the ALUA metadata buf that has been allocated in | |
1033 | * core_alua_do_port_transition(), this metadata will be written | |
1034 | * to struct file. | |
1035 | * | |
1036 | * Note that there is the case where we do not want to update the | |
1037 | * metadata when the saved metadata is being parsed in userspace | |
1038 | * when setting the existing port access state and access status. | |
1039 | * | |
1040 | * Also note that the failure to write out the ALUA metadata to | |
1041 | * struct file does NOT affect the actual ALUA transition. | |
1042 | */ | |
1043 | if (tg_pt_gp->tg_pt_gp_write_metadata) { | |
1044 | mutex_lock(&tg_pt_gp->tg_pt_gp_md_mutex); | |
9c6e164c | 1045 | core_alua_update_tpg_primary_metadata(tg_pt_gp); |
c66ac9db NB |
1046 | mutex_unlock(&tg_pt_gp->tg_pt_gp_md_mutex); |
1047 | } | |
1048 | /* | |
1049 | * Set the current primary ALUA access state to the requested new state | |
1050 | */ | |
dfbce75a HR |
1051 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
1052 | tg_pt_gp->tg_pt_gp_alua_pending_state); | |
c66ac9db | 1053 | |
6708bb27 | 1054 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1055 | " from primary access state %s to %s\n", (explicit) ? "explicit" : |
1056 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
dfbce75a HR |
1057 | tg_pt_gp->tg_pt_gp_id, |
1058 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_previous_state), | |
1059 | core_alua_dump_state(tg_pt_gp->tg_pt_gp_alua_pending_state)); | |
9c6e164c HR |
1060 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1061 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1062 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1063 | ||
1064 | if (tg_pt_gp->tg_pt_gp_transition_complete) | |
1065 | complete(tg_pt_gp->tg_pt_gp_transition_complete); | |
1066 | } | |
1067 | ||
1068 | static int core_alua_do_transition_tg_pt( | |
1069 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1070 | int new_state, | |
1071 | int explicit) | |
1072 | { | |
1073 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; | |
1074 | DECLARE_COMPLETION_ONSTACK(wait); | |
1075 | ||
1076 | /* Nothing to be done here */ | |
1077 | if (atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == new_state) | |
1078 | return 0; | |
1079 | ||
1080 | if (new_state == ALUA_ACCESS_STATE_TRANSITION) | |
1081 | return -EAGAIN; | |
1082 | ||
1083 | /* | |
1084 | * Flush any pending transitions | |
1085 | */ | |
1086 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs && | |
1087 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) == | |
1088 | ALUA_ACCESS_STATE_TRANSITION) { | |
1089 | /* Just in case */ | |
1090 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1091 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1092 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); | |
1093 | wait_for_completion(&wait); | |
1094 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * Save the old primary ALUA access state, and set the current state | |
1100 | * to ALUA_ACCESS_STATE_TRANSITION. | |
1101 | */ | |
1102 | tg_pt_gp->tg_pt_gp_alua_previous_state = | |
1103 | atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); | |
1104 | tg_pt_gp->tg_pt_gp_alua_pending_state = new_state; | |
1105 | ||
1106 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, | |
1107 | ALUA_ACCESS_STATE_TRANSITION); | |
1108 | tg_pt_gp->tg_pt_gp_alua_access_status = (explicit) ? | |
1109 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1110 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
1111 | ||
1112 | /* | |
1113 | * Check for the optional ALUA primary state transition delay | |
1114 | */ | |
1115 | if (tg_pt_gp->tg_pt_gp_trans_delay_msecs != 0) | |
1116 | msleep_interruptible(tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
1117 | ||
1118 | /* | |
1119 | * Take a reference for workqueue item | |
1120 | */ | |
1121 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1122 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); | |
9c6e164c HR |
1123 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
1124 | ||
1125 | if (!explicit && tg_pt_gp->tg_pt_gp_implicit_trans_secs) { | |
1126 | unsigned long transition_tmo; | |
1127 | ||
1128 | transition_tmo = tg_pt_gp->tg_pt_gp_implicit_trans_secs * HZ; | |
1129 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1130 | &tg_pt_gp->tg_pt_gp_transition_work, | |
1131 | transition_tmo); | |
1132 | } else { | |
1133 | tg_pt_gp->tg_pt_gp_transition_complete = &wait; | |
1134 | queue_delayed_work(tg_pt_gp->tg_pt_gp_dev->tmr_wq, | |
1135 | &tg_pt_gp->tg_pt_gp_transition_work, 0); | |
1136 | wait_for_completion(&wait); | |
1137 | tg_pt_gp->tg_pt_gp_transition_complete = NULL; | |
1138 | } | |
c66ac9db NB |
1139 | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | int core_alua_do_port_transition( | |
1144 | struct t10_alua_tg_pt_gp *l_tg_pt_gp, | |
1145 | struct se_device *l_dev, | |
1146 | struct se_port *l_port, | |
1147 | struct se_node_acl *l_nacl, | |
1148 | int new_state, | |
125d0119 | 1149 | int explicit) |
c66ac9db NB |
1150 | { |
1151 | struct se_device *dev; | |
c66ac9db NB |
1152 | struct t10_alua_lu_gp *lu_gp; |
1153 | struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem; | |
1154 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
9c6e164c | 1155 | int primary, valid_states, rc = 0; |
c66ac9db | 1156 | |
bb91c1a0 HR |
1157 | valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states; |
1158 | if (core_alua_check_transition(new_state, valid_states, &primary) != 0) | |
c66ac9db NB |
1159 | return -EINVAL; |
1160 | ||
c66ac9db NB |
1161 | local_lu_gp_mem = l_dev->dev_alua_lu_gp_mem; |
1162 | spin_lock(&local_lu_gp_mem->lu_gp_mem_lock); | |
1163 | lu_gp = local_lu_gp_mem->lu_gp; | |
1164 | atomic_inc(&lu_gp->lu_gp_ref_cnt); | |
c66ac9db NB |
1165 | spin_unlock(&local_lu_gp_mem->lu_gp_mem_lock); |
1166 | /* | |
1167 | * For storage objects that are members of the 'default_lu_gp', | |
1168 | * we only do transition on the passed *l_tp_pt_gp, and not | |
1169 | * on all of the matching target port groups IDs in default_lu_gp. | |
1170 | */ | |
6708bb27 | 1171 | if (!lu_gp->lu_gp_id) { |
c66ac9db NB |
1172 | /* |
1173 | * core_alua_do_transition_tg_pt() will always return | |
1174 | * success. | |
1175 | */ | |
9c6e164c HR |
1176 | l_tg_pt_gp->tg_pt_gp_alua_port = l_port; |
1177 | l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; | |
1178 | rc = core_alua_do_transition_tg_pt(l_tg_pt_gp, | |
1179 | new_state, explicit); | |
33940d09 | 1180 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1181 | return rc; |
c66ac9db NB |
1182 | } |
1183 | /* | |
1184 | * For all other LU groups aside from 'default_lu_gp', walk all of | |
1185 | * the associated storage objects looking for a matching target port | |
1186 | * group ID from the local target port group. | |
1187 | */ | |
1188 | spin_lock(&lu_gp->lu_gp_lock); | |
1189 | list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, | |
1190 | lu_gp_mem_list) { | |
1191 | ||
1192 | dev = lu_gp_mem->lu_gp_mem_dev; | |
33940d09 | 1193 | atomic_inc_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1194 | spin_unlock(&lu_gp->lu_gp_lock); |
1195 | ||
0fd97ccf | 1196 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1197 | list_for_each_entry(tg_pt_gp, |
0fd97ccf | 1198 | &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1199 | tg_pt_gp_list) { |
1200 | ||
6708bb27 | 1201 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1202 | continue; |
1203 | /* | |
1204 | * If the target behavior port asymmetric access state | |
f1ae05d5 | 1205 | * is changed for any target port group accessible via |
c66ac9db NB |
1206 | * a logical unit within a LU group, the target port |
1207 | * behavior group asymmetric access states for the same | |
1208 | * target port group accessible via other logical units | |
1209 | * in that LU group will also change. | |
1210 | */ | |
1211 | if (l_tg_pt_gp->tg_pt_gp_id != tg_pt_gp->tg_pt_gp_id) | |
1212 | continue; | |
1213 | ||
1214 | if (l_tg_pt_gp == tg_pt_gp) { | |
9c6e164c HR |
1215 | tg_pt_gp->tg_pt_gp_alua_port = l_port; |
1216 | tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl; | |
c66ac9db | 1217 | } else { |
9c6e164c HR |
1218 | tg_pt_gp->tg_pt_gp_alua_port = NULL; |
1219 | tg_pt_gp->tg_pt_gp_alua_nacl = NULL; | |
c66ac9db | 1220 | } |
33940d09 | 1221 | atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1222 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1223 | /* |
1224 | * core_alua_do_transition_tg_pt() will always return | |
1225 | * success. | |
1226 | */ | |
9c6e164c HR |
1227 | rc = core_alua_do_transition_tg_pt(tg_pt_gp, |
1228 | new_state, explicit); | |
c66ac9db | 1229 | |
0fd97ccf | 1230 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
33940d09 | 1231 | atomic_dec_mb(&tg_pt_gp->tg_pt_gp_ref_cnt); |
9c6e164c HR |
1232 | if (rc) |
1233 | break; | |
c66ac9db | 1234 | } |
0fd97ccf | 1235 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1236 | |
1237 | spin_lock(&lu_gp->lu_gp_lock); | |
33940d09 | 1238 | atomic_dec_mb(&lu_gp_mem->lu_gp_mem_ref_cnt); |
c66ac9db NB |
1239 | } |
1240 | spin_unlock(&lu_gp->lu_gp_lock); | |
1241 | ||
9c6e164c HR |
1242 | if (!rc) { |
1243 | pr_debug("Successfully processed LU Group: %s all ALUA TG PT" | |
1244 | " Group IDs: %hu %s transition to primary state: %s\n", | |
1245 | config_item_name(&lu_gp->lu_gp_group.cg_item), | |
1246 | l_tg_pt_gp->tg_pt_gp_id, | |
1247 | (explicit) ? "explicit" : "implicit", | |
1248 | core_alua_dump_state(new_state)); | |
1249 | } | |
c66ac9db | 1250 | |
33940d09 | 1251 | atomic_dec_mb(&lu_gp->lu_gp_ref_cnt); |
9c6e164c | 1252 | return rc; |
c66ac9db NB |
1253 | } |
1254 | ||
1255 | /* | |
1256 | * Called with tg_pt_gp_mem->sep_tg_pt_md_mutex held | |
1257 | */ | |
1258 | static int core_alua_update_tpg_secondary_metadata( | |
1259 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1e0b9403 | 1260 | struct se_port *port) |
c66ac9db | 1261 | { |
1e0b9403 | 1262 | unsigned char *md_buf; |
c66ac9db NB |
1263 | struct se_portal_group *se_tpg = port->sep_tpg; |
1264 | char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN]; | |
1e0b9403 HR |
1265 | int len, rc; |
1266 | ||
1267 | md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL); | |
1268 | if (!md_buf) { | |
1269 | pr_err("Unable to allocate buf for ALUA metadata\n"); | |
1270 | return -ENOMEM; | |
1271 | } | |
c66ac9db NB |
1272 | |
1273 | memset(path, 0, ALUA_METADATA_PATH_LEN); | |
1274 | memset(wwn, 0, ALUA_SECONDARY_METADATA_WWN_LEN); | |
1275 | ||
1276 | len = snprintf(wwn, ALUA_SECONDARY_METADATA_WWN_LEN, "%s", | |
e3d6f909 | 1277 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg)); |
c66ac9db | 1278 | |
e3d6f909 | 1279 | if (se_tpg->se_tpg_tfo->tpg_get_tag != NULL) |
c66ac9db | 1280 | snprintf(wwn+len, ALUA_SECONDARY_METADATA_WWN_LEN-len, "+%hu", |
e3d6f909 | 1281 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
c66ac9db | 1282 | |
1e0b9403 | 1283 | len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n" |
c66ac9db NB |
1284 | "alua_tg_pt_status=0x%02x\n", |
1285 | atomic_read(&port->sep_tg_pt_secondary_offline), | |
1286 | port->sep_tg_pt_secondary_stat); | |
1287 | ||
1288 | snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%u", | |
e3d6f909 | 1289 | se_tpg->se_tpg_tfo->get_fabric_name(), wwn, |
c66ac9db NB |
1290 | port->sep_lun->unpacked_lun); |
1291 | ||
1e0b9403 HR |
1292 | rc = core_alua_write_tpg_metadata(path, md_buf, len); |
1293 | kfree(md_buf); | |
1294 | ||
1295 | return rc; | |
c66ac9db NB |
1296 | } |
1297 | ||
1298 | static int core_alua_set_tg_pt_secondary_state( | |
1299 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1300 | struct se_port *port, | |
125d0119 | 1301 | int explicit, |
c66ac9db NB |
1302 | int offline) |
1303 | { | |
1304 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
c66ac9db NB |
1305 | int trans_delay_msecs; |
1306 | ||
1307 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1308 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 1309 | if (!tg_pt_gp) { |
c66ac9db | 1310 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
6708bb27 | 1311 | pr_err("Unable to complete secondary state" |
c66ac9db | 1312 | " transition\n"); |
e3d6f909 | 1313 | return -EINVAL; |
c66ac9db NB |
1314 | } |
1315 | trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs; | |
1316 | /* | |
1317 | * Set the secondary ALUA target port access state to OFFLINE | |
1318 | * or release the previously secondary state for struct se_port | |
1319 | */ | |
1320 | if (offline) | |
1321 | atomic_set(&port->sep_tg_pt_secondary_offline, 1); | |
1322 | else | |
1323 | atomic_set(&port->sep_tg_pt_secondary_offline, 0); | |
1324 | ||
125d0119 HR |
1325 | port->sep_tg_pt_secondary_stat = (explicit) ? |
1326 | ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG : | |
1327 | ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA; | |
c66ac9db | 1328 | |
6708bb27 | 1329 | pr_debug("Successful %s ALUA transition TG PT Group: %s ID: %hu" |
125d0119 HR |
1330 | " to secondary access state: %s\n", (explicit) ? "explicit" : |
1331 | "implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item), | |
c66ac9db NB |
1332 | tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE"); |
1333 | ||
1334 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1335 | /* | |
1336 | * Do the optional transition delay after we set the secondary | |
1337 | * ALUA access state. | |
1338 | */ | |
1339 | if (trans_delay_msecs != 0) | |
1340 | msleep_interruptible(trans_delay_msecs); | |
1341 | /* | |
1342 | * See if we need to update the ALUA fabric port metadata for | |
1343 | * secondary state and status | |
1344 | */ | |
1345 | if (port->sep_tg_pt_secondary_write_md) { | |
c66ac9db | 1346 | mutex_lock(&port->sep_tg_pt_md_mutex); |
1e0b9403 | 1347 | core_alua_update_tpg_secondary_metadata(tg_pt_gp_mem, port); |
c66ac9db | 1348 | mutex_unlock(&port->sep_tg_pt_md_mutex); |
c66ac9db NB |
1349 | } |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
229d4f11 HR |
1354 | struct t10_alua_lba_map * |
1355 | core_alua_allocate_lba_map(struct list_head *list, | |
1356 | u64 first_lba, u64 last_lba) | |
1357 | { | |
1358 | struct t10_alua_lba_map *lba_map; | |
1359 | ||
1360 | lba_map = kmem_cache_zalloc(t10_alua_lba_map_cache, GFP_KERNEL); | |
1361 | if (!lba_map) { | |
1362 | pr_err("Unable to allocate struct t10_alua_lba_map\n"); | |
1363 | return ERR_PTR(-ENOMEM); | |
1364 | } | |
1365 | INIT_LIST_HEAD(&lba_map->lba_map_mem_list); | |
1366 | lba_map->lba_map_first_lba = first_lba; | |
1367 | lba_map->lba_map_last_lba = last_lba; | |
1368 | ||
1369 | list_add_tail(&lba_map->lba_map_list, list); | |
1370 | return lba_map; | |
1371 | } | |
1372 | ||
1373 | int | |
1374 | core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *lba_map, | |
1375 | int pg_id, int state) | |
1376 | { | |
1377 | struct t10_alua_lba_map_member *lba_map_mem; | |
1378 | ||
1379 | list_for_each_entry(lba_map_mem, &lba_map->lba_map_mem_list, | |
1380 | lba_map_mem_list) { | |
1381 | if (lba_map_mem->lba_map_mem_alua_pg_id == pg_id) { | |
1382 | pr_err("Duplicate pg_id %d in lba_map\n", pg_id); | |
1383 | return -EINVAL; | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | lba_map_mem = kmem_cache_zalloc(t10_alua_lba_map_mem_cache, GFP_KERNEL); | |
1388 | if (!lba_map_mem) { | |
1389 | pr_err("Unable to allocate struct t10_alua_lba_map_mem\n"); | |
1390 | return -ENOMEM; | |
1391 | } | |
1392 | lba_map_mem->lba_map_mem_alua_state = state; | |
1393 | lba_map_mem->lba_map_mem_alua_pg_id = pg_id; | |
1394 | ||
1395 | list_add_tail(&lba_map_mem->lba_map_mem_list, | |
1396 | &lba_map->lba_map_mem_list); | |
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | void | |
1401 | core_alua_free_lba_map(struct list_head *lba_list) | |
1402 | { | |
1403 | struct t10_alua_lba_map *lba_map, *lba_map_tmp; | |
1404 | struct t10_alua_lba_map_member *lba_map_mem, *lba_map_mem_tmp; | |
1405 | ||
1406 | list_for_each_entry_safe(lba_map, lba_map_tmp, lba_list, | |
1407 | lba_map_list) { | |
1408 | list_for_each_entry_safe(lba_map_mem, lba_map_mem_tmp, | |
1409 | &lba_map->lba_map_mem_list, | |
1410 | lba_map_mem_list) { | |
1411 | list_del(&lba_map_mem->lba_map_mem_list); | |
1412 | kmem_cache_free(t10_alua_lba_map_mem_cache, | |
1413 | lba_map_mem); | |
1414 | } | |
1415 | list_del(&lba_map->lba_map_list); | |
1416 | kmem_cache_free(t10_alua_lba_map_cache, lba_map); | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | void | |
1421 | core_alua_set_lba_map(struct se_device *dev, struct list_head *lba_map_list, | |
1422 | int segment_size, int segment_mult) | |
1423 | { | |
1424 | struct list_head old_lba_map_list; | |
1425 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1426 | int activate = 0, supported; | |
1427 | ||
1428 | INIT_LIST_HEAD(&old_lba_map_list); | |
1429 | spin_lock(&dev->t10_alua.lba_map_lock); | |
1430 | dev->t10_alua.lba_map_segment_size = segment_size; | |
1431 | dev->t10_alua.lba_map_segment_multiplier = segment_mult; | |
1432 | list_splice_init(&dev->t10_alua.lba_map_list, &old_lba_map_list); | |
1433 | if (lba_map_list) { | |
1434 | list_splice_init(lba_map_list, &dev->t10_alua.lba_map_list); | |
1435 | activate = 1; | |
1436 | } | |
1437 | spin_unlock(&dev->t10_alua.lba_map_lock); | |
1438 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); | |
1439 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
1440 | tg_pt_gp_list) { | |
1441 | ||
1442 | if (!tg_pt_gp->tg_pt_gp_valid_id) | |
1443 | continue; | |
1444 | supported = tg_pt_gp->tg_pt_gp_alua_supported_states; | |
1445 | if (activate) | |
1446 | supported |= ALUA_LBD_SUP; | |
1447 | else | |
1448 | supported &= ~ALUA_LBD_SUP; | |
1449 | tg_pt_gp->tg_pt_gp_alua_supported_states = supported; | |
1450 | } | |
1451 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1452 | core_alua_free_lba_map(&old_lba_map_list); | |
1453 | } | |
1454 | ||
c66ac9db NB |
1455 | struct t10_alua_lu_gp * |
1456 | core_alua_allocate_lu_gp(const char *name, int def_group) | |
1457 | { | |
1458 | struct t10_alua_lu_gp *lu_gp; | |
1459 | ||
1460 | lu_gp = kmem_cache_zalloc(t10_alua_lu_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1461 | if (!lu_gp) { |
1462 | pr_err("Unable to allocate struct t10_alua_lu_gp\n"); | |
6eab04a8 | 1463 | return ERR_PTR(-ENOMEM); |
c66ac9db | 1464 | } |
e3d6f909 | 1465 | INIT_LIST_HEAD(&lu_gp->lu_gp_node); |
c66ac9db NB |
1466 | INIT_LIST_HEAD(&lu_gp->lu_gp_mem_list); |
1467 | spin_lock_init(&lu_gp->lu_gp_lock); | |
1468 | atomic_set(&lu_gp->lu_gp_ref_cnt, 0); | |
1469 | ||
1470 | if (def_group) { | |
e3d6f909 | 1471 | lu_gp->lu_gp_id = alua_lu_gps_counter++; |
c66ac9db | 1472 | lu_gp->lu_gp_valid_id = 1; |
e3d6f909 | 1473 | alua_lu_gps_count++; |
c66ac9db NB |
1474 | } |
1475 | ||
1476 | return lu_gp; | |
1477 | } | |
1478 | ||
1479 | int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *lu_gp, u16 lu_gp_id) | |
1480 | { | |
1481 | struct t10_alua_lu_gp *lu_gp_tmp; | |
1482 | u16 lu_gp_id_tmp; | |
1483 | /* | |
1484 | * The lu_gp->lu_gp_id may only be set once.. | |
1485 | */ | |
1486 | if (lu_gp->lu_gp_valid_id) { | |
6708bb27 | 1487 | pr_warn("ALUA LU Group already has a valid ID," |
c66ac9db | 1488 | " ignoring request\n"); |
e3d6f909 | 1489 | return -EINVAL; |
c66ac9db NB |
1490 | } |
1491 | ||
e3d6f909 AG |
1492 | spin_lock(&lu_gps_lock); |
1493 | if (alua_lu_gps_count == 0x0000ffff) { | |
6708bb27 | 1494 | pr_err("Maximum ALUA alua_lu_gps_count:" |
c66ac9db | 1495 | " 0x0000ffff reached\n"); |
e3d6f909 | 1496 | spin_unlock(&lu_gps_lock); |
c66ac9db | 1497 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); |
e3d6f909 | 1498 | return -ENOSPC; |
c66ac9db NB |
1499 | } |
1500 | again: | |
1501 | lu_gp_id_tmp = (lu_gp_id != 0) ? lu_gp_id : | |
e3d6f909 | 1502 | alua_lu_gps_counter++; |
c66ac9db | 1503 | |
e3d6f909 | 1504 | list_for_each_entry(lu_gp_tmp, &lu_gps_list, lu_gp_node) { |
c66ac9db | 1505 | if (lu_gp_tmp->lu_gp_id == lu_gp_id_tmp) { |
6708bb27 | 1506 | if (!lu_gp_id) |
c66ac9db NB |
1507 | goto again; |
1508 | ||
6708bb27 | 1509 | pr_warn("ALUA Logical Unit Group ID: %hu" |
c66ac9db NB |
1510 | " already exists, ignoring request\n", |
1511 | lu_gp_id); | |
e3d6f909 AG |
1512 | spin_unlock(&lu_gps_lock); |
1513 | return -EINVAL; | |
c66ac9db NB |
1514 | } |
1515 | } | |
1516 | ||
1517 | lu_gp->lu_gp_id = lu_gp_id_tmp; | |
1518 | lu_gp->lu_gp_valid_id = 1; | |
e3d6f909 AG |
1519 | list_add_tail(&lu_gp->lu_gp_node, &lu_gps_list); |
1520 | alua_lu_gps_count++; | |
1521 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1522 | |
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | static struct t10_alua_lu_gp_member * | |
1527 | core_alua_allocate_lu_gp_mem(struct se_device *dev) | |
1528 | { | |
1529 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1530 | ||
1531 | lu_gp_mem = kmem_cache_zalloc(t10_alua_lu_gp_mem_cache, GFP_KERNEL); | |
6708bb27 AG |
1532 | if (!lu_gp_mem) { |
1533 | pr_err("Unable to allocate struct t10_alua_lu_gp_member\n"); | |
c66ac9db NB |
1534 | return ERR_PTR(-ENOMEM); |
1535 | } | |
1536 | INIT_LIST_HEAD(&lu_gp_mem->lu_gp_mem_list); | |
1537 | spin_lock_init(&lu_gp_mem->lu_gp_mem_lock); | |
1538 | atomic_set(&lu_gp_mem->lu_gp_mem_ref_cnt, 0); | |
1539 | ||
1540 | lu_gp_mem->lu_gp_mem_dev = dev; | |
1541 | dev->dev_alua_lu_gp_mem = lu_gp_mem; | |
1542 | ||
1543 | return lu_gp_mem; | |
1544 | } | |
1545 | ||
1546 | void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp) | |
1547 | { | |
1548 | struct t10_alua_lu_gp_member *lu_gp_mem, *lu_gp_mem_tmp; | |
1549 | /* | |
1550 | * Once we have reached this point, config_item_put() has | |
1551 | * already been called from target_core_alua_drop_lu_gp(). | |
1552 | * | |
1553 | * Here, we remove the *lu_gp from the global list so that | |
1554 | * no associations can be made while we are releasing | |
1555 | * struct t10_alua_lu_gp. | |
1556 | */ | |
e3d6f909 | 1557 | spin_lock(&lu_gps_lock); |
e3d6f909 AG |
1558 | list_del(&lu_gp->lu_gp_node); |
1559 | alua_lu_gps_count--; | |
1560 | spin_unlock(&lu_gps_lock); | |
c66ac9db NB |
1561 | /* |
1562 | * Allow struct t10_alua_lu_gp * referenced by core_alua_get_lu_gp_by_name() | |
1563 | * in target_core_configfs.c:target_core_store_alua_lu_gp() to be | |
1564 | * released with core_alua_put_lu_gp_from_name() | |
1565 | */ | |
1566 | while (atomic_read(&lu_gp->lu_gp_ref_cnt)) | |
1567 | cpu_relax(); | |
1568 | /* | |
1569 | * Release reference to struct t10_alua_lu_gp * from all associated | |
1570 | * struct se_device. | |
1571 | */ | |
1572 | spin_lock(&lu_gp->lu_gp_lock); | |
1573 | list_for_each_entry_safe(lu_gp_mem, lu_gp_mem_tmp, | |
1574 | &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { | |
1575 | if (lu_gp_mem->lu_gp_assoc) { | |
1576 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1577 | lu_gp->lu_gp_members--; | |
1578 | lu_gp_mem->lu_gp_assoc = 0; | |
1579 | } | |
1580 | spin_unlock(&lu_gp->lu_gp_lock); | |
1581 | /* | |
1582 | * | |
25985edc | 1583 | * lu_gp_mem is associated with a single |
c66ac9db NB |
1584 | * struct se_device->dev_alua_lu_gp_mem, and is released when |
1585 | * struct se_device is released via core_alua_free_lu_gp_mem(). | |
1586 | * | |
1587 | * If the passed lu_gp does NOT match the default_lu_gp, assume | |
f1ae05d5 | 1588 | * we want to re-associate a given lu_gp_mem with default_lu_gp. |
c66ac9db NB |
1589 | */ |
1590 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
e3d6f909 | 1591 | if (lu_gp != default_lu_gp) |
c66ac9db | 1592 | __core_alua_attach_lu_gp_mem(lu_gp_mem, |
e3d6f909 | 1593 | default_lu_gp); |
c66ac9db NB |
1594 | else |
1595 | lu_gp_mem->lu_gp = NULL; | |
1596 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1597 | ||
1598 | spin_lock(&lu_gp->lu_gp_lock); | |
1599 | } | |
1600 | spin_unlock(&lu_gp->lu_gp_lock); | |
1601 | ||
1602 | kmem_cache_free(t10_alua_lu_gp_cache, lu_gp); | |
1603 | } | |
1604 | ||
1605 | void core_alua_free_lu_gp_mem(struct se_device *dev) | |
1606 | { | |
c66ac9db NB |
1607 | struct t10_alua_lu_gp *lu_gp; |
1608 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
1609 | ||
c66ac9db | 1610 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 1611 | if (!lu_gp_mem) |
c66ac9db NB |
1612 | return; |
1613 | ||
1614 | while (atomic_read(&lu_gp_mem->lu_gp_mem_ref_cnt)) | |
1615 | cpu_relax(); | |
1616 | ||
1617 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
1618 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 1619 | if (lu_gp) { |
c66ac9db NB |
1620 | spin_lock(&lu_gp->lu_gp_lock); |
1621 | if (lu_gp_mem->lu_gp_assoc) { | |
1622 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1623 | lu_gp->lu_gp_members--; | |
1624 | lu_gp_mem->lu_gp_assoc = 0; | |
1625 | } | |
1626 | spin_unlock(&lu_gp->lu_gp_lock); | |
1627 | lu_gp_mem->lu_gp = NULL; | |
1628 | } | |
1629 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
1630 | ||
1631 | kmem_cache_free(t10_alua_lu_gp_mem_cache, lu_gp_mem); | |
1632 | } | |
1633 | ||
1634 | struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *name) | |
1635 | { | |
1636 | struct t10_alua_lu_gp *lu_gp; | |
1637 | struct config_item *ci; | |
1638 | ||
e3d6f909 AG |
1639 | spin_lock(&lu_gps_lock); |
1640 | list_for_each_entry(lu_gp, &lu_gps_list, lu_gp_node) { | |
6708bb27 | 1641 | if (!lu_gp->lu_gp_valid_id) |
c66ac9db NB |
1642 | continue; |
1643 | ci = &lu_gp->lu_gp_group.cg_item; | |
6708bb27 | 1644 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1645 | atomic_inc(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1646 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1647 | return lu_gp; |
1648 | } | |
1649 | } | |
e3d6f909 | 1650 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1651 | |
1652 | return NULL; | |
1653 | } | |
1654 | ||
1655 | void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *lu_gp) | |
1656 | { | |
e3d6f909 | 1657 | spin_lock(&lu_gps_lock); |
c66ac9db | 1658 | atomic_dec(&lu_gp->lu_gp_ref_cnt); |
e3d6f909 | 1659 | spin_unlock(&lu_gps_lock); |
c66ac9db NB |
1660 | } |
1661 | ||
1662 | /* | |
1663 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1664 | */ | |
1665 | void __core_alua_attach_lu_gp_mem( | |
1666 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1667 | struct t10_alua_lu_gp *lu_gp) | |
1668 | { | |
1669 | spin_lock(&lu_gp->lu_gp_lock); | |
1670 | lu_gp_mem->lu_gp = lu_gp; | |
1671 | lu_gp_mem->lu_gp_assoc = 1; | |
1672 | list_add_tail(&lu_gp_mem->lu_gp_mem_list, &lu_gp->lu_gp_mem_list); | |
1673 | lu_gp->lu_gp_members++; | |
1674 | spin_unlock(&lu_gp->lu_gp_lock); | |
1675 | } | |
1676 | ||
1677 | /* | |
1678 | * Called with struct t10_alua_lu_gp_member->lu_gp_mem_lock | |
1679 | */ | |
1680 | void __core_alua_drop_lu_gp_mem( | |
1681 | struct t10_alua_lu_gp_member *lu_gp_mem, | |
1682 | struct t10_alua_lu_gp *lu_gp) | |
1683 | { | |
1684 | spin_lock(&lu_gp->lu_gp_lock); | |
1685 | list_del(&lu_gp_mem->lu_gp_mem_list); | |
1686 | lu_gp_mem->lu_gp = NULL; | |
1687 | lu_gp_mem->lu_gp_assoc = 0; | |
1688 | lu_gp->lu_gp_members--; | |
1689 | spin_unlock(&lu_gp->lu_gp_lock); | |
1690 | } | |
1691 | ||
0fd97ccf CH |
1692 | struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev, |
1693 | const char *name, int def_group) | |
c66ac9db NB |
1694 | { |
1695 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1696 | ||
1697 | tg_pt_gp = kmem_cache_zalloc(t10_alua_tg_pt_gp_cache, GFP_KERNEL); | |
6708bb27 AG |
1698 | if (!tg_pt_gp) { |
1699 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp\n"); | |
c66ac9db NB |
1700 | return NULL; |
1701 | } | |
1702 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list); | |
1703 | INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_mem_list); | |
1704 | mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex); | |
1705 | spin_lock_init(&tg_pt_gp->tg_pt_gp_lock); | |
1706 | atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0); | |
9c6e164c HR |
1707 | INIT_DELAYED_WORK(&tg_pt_gp->tg_pt_gp_transition_work, |
1708 | core_alua_do_transition_tg_pt_work); | |
0fd97ccf | 1709 | tg_pt_gp->tg_pt_gp_dev = dev; |
c66ac9db | 1710 | atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state, |
73f3bf51 | 1711 | ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED); |
c66ac9db | 1712 | /* |
125d0119 | 1713 | * Enable both explicit and implicit ALUA support by default |
c66ac9db NB |
1714 | */ |
1715 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 1716 | TPGS_EXPLICIT_ALUA | TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
1717 | /* |
1718 | * Set the default Active/NonOptimized Delay in milliseconds | |
1719 | */ | |
1720 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = ALUA_DEFAULT_NONOP_DELAY_MSECS; | |
1721 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS; | |
125d0119 | 1722 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS; |
c66ac9db | 1723 | |
c0dc941e HR |
1724 | /* |
1725 | * Enable all supported states | |
1726 | */ | |
1727 | tg_pt_gp->tg_pt_gp_alua_supported_states = | |
1728 | ALUA_T_SUP | ALUA_O_SUP | | |
1729 | ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP; | |
1730 | ||
c66ac9db | 1731 | if (def_group) { |
0fd97ccf | 1732 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1733 | tg_pt_gp->tg_pt_gp_id = |
0fd97ccf | 1734 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1735 | tg_pt_gp->tg_pt_gp_valid_id = 1; |
0fd97ccf | 1736 | dev->t10_alua.alua_tg_pt_gps_count++; |
c66ac9db | 1737 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, |
0fd97ccf CH |
1738 | &dev->t10_alua.tg_pt_gps_list); |
1739 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1740 | } |
1741 | ||
1742 | return tg_pt_gp; | |
1743 | } | |
1744 | ||
1745 | int core_alua_set_tg_pt_gp_id( | |
1746 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
1747 | u16 tg_pt_gp_id) | |
1748 | { | |
0fd97ccf | 1749 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db NB |
1750 | struct t10_alua_tg_pt_gp *tg_pt_gp_tmp; |
1751 | u16 tg_pt_gp_id_tmp; | |
0fd97ccf | 1752 | |
c66ac9db NB |
1753 | /* |
1754 | * The tg_pt_gp->tg_pt_gp_id may only be set once.. | |
1755 | */ | |
1756 | if (tg_pt_gp->tg_pt_gp_valid_id) { | |
6708bb27 | 1757 | pr_warn("ALUA TG PT Group already has a valid ID," |
c66ac9db | 1758 | " ignoring request\n"); |
e3d6f909 | 1759 | return -EINVAL; |
c66ac9db NB |
1760 | } |
1761 | ||
0fd97ccf CH |
1762 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1763 | if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) { | |
6708bb27 | 1764 | pr_err("Maximum ALUA alua_tg_pt_gps_count:" |
c66ac9db | 1765 | " 0x0000ffff reached\n"); |
0fd97ccf | 1766 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1767 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); |
e3d6f909 | 1768 | return -ENOSPC; |
c66ac9db NB |
1769 | } |
1770 | again: | |
1771 | tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id : | |
0fd97ccf | 1772 | dev->t10_alua.alua_tg_pt_gps_counter++; |
c66ac9db | 1773 | |
0fd97ccf | 1774 | list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list, |
c66ac9db NB |
1775 | tg_pt_gp_list) { |
1776 | if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) { | |
6708bb27 | 1777 | if (!tg_pt_gp_id) |
c66ac9db NB |
1778 | goto again; |
1779 | ||
6708bb27 | 1780 | pr_err("ALUA Target Port Group ID: %hu already" |
c66ac9db | 1781 | " exists, ignoring request\n", tg_pt_gp_id); |
0fd97ccf | 1782 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
e3d6f909 | 1783 | return -EINVAL; |
c66ac9db NB |
1784 | } |
1785 | } | |
1786 | ||
1787 | tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp; | |
1788 | tg_pt_gp->tg_pt_gp_valid_id = 1; | |
1789 | list_add_tail(&tg_pt_gp->tg_pt_gp_list, | |
0fd97ccf CH |
1790 | &dev->t10_alua.tg_pt_gps_list); |
1791 | dev->t10_alua.alua_tg_pt_gps_count++; | |
1792 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
c66ac9db NB |
1793 | |
1794 | return 0; | |
1795 | } | |
1796 | ||
1797 | struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem( | |
1798 | struct se_port *port) | |
1799 | { | |
1800 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
1801 | ||
1802 | tg_pt_gp_mem = kmem_cache_zalloc(t10_alua_tg_pt_gp_mem_cache, | |
1803 | GFP_KERNEL); | |
6708bb27 AG |
1804 | if (!tg_pt_gp_mem) { |
1805 | pr_err("Unable to allocate struct t10_alua_tg_pt_gp_member\n"); | |
c66ac9db NB |
1806 | return ERR_PTR(-ENOMEM); |
1807 | } | |
1808 | INIT_LIST_HEAD(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1809 | spin_lock_init(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1810 | atomic_set(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt, 0); | |
1811 | ||
1812 | tg_pt_gp_mem->tg_pt = port; | |
1813 | port->sep_alua_tg_pt_gp_mem = tg_pt_gp_mem; | |
c66ac9db NB |
1814 | |
1815 | return tg_pt_gp_mem; | |
1816 | } | |
1817 | ||
1818 | void core_alua_free_tg_pt_gp( | |
1819 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1820 | { | |
0fd97ccf | 1821 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1822 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp; |
0fd97ccf | 1823 | |
c66ac9db NB |
1824 | /* |
1825 | * Once we have reached this point, config_item_put() has already | |
1826 | * been called from target_core_alua_drop_tg_pt_gp(). | |
1827 | * | |
1828 | * Here we remove *tg_pt_gp from the global list so that | |
f1ae05d5 | 1829 | * no associations *OR* explicit ALUA via SET_TARGET_PORT_GROUPS |
c66ac9db NB |
1830 | * can be made while we are releasing struct t10_alua_tg_pt_gp. |
1831 | */ | |
0fd97ccf | 1832 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1833 | list_del(&tg_pt_gp->tg_pt_gp_list); |
0fd97ccf CH |
1834 | dev->t10_alua.alua_tg_pt_gps_counter--; |
1835 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); | |
1836 | ||
9c6e164c HR |
1837 | flush_delayed_work(&tg_pt_gp->tg_pt_gp_transition_work); |
1838 | ||
c66ac9db NB |
1839 | /* |
1840 | * Allow a struct t10_alua_tg_pt_gp_member * referenced by | |
1841 | * core_alua_get_tg_pt_gp_by_name() in | |
1842 | * target_core_configfs.c:target_core_store_alua_tg_pt_gp() | |
1843 | * to be released with core_alua_put_tg_pt_gp_from_name(). | |
1844 | */ | |
1845 | while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt)) | |
1846 | cpu_relax(); | |
0fd97ccf | 1847 | |
c66ac9db NB |
1848 | /* |
1849 | * Release reference to struct t10_alua_tg_pt_gp from all associated | |
1850 | * struct se_port. | |
1851 | */ | |
1852 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1853 | list_for_each_entry_safe(tg_pt_gp_mem, tg_pt_gp_mem_tmp, | |
1854 | &tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) { | |
1855 | if (tg_pt_gp_mem->tg_pt_gp_assoc) { | |
1856 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1857 | tg_pt_gp->tg_pt_gp_members--; | |
1858 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; | |
1859 | } | |
1860 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1861 | /* | |
25985edc | 1862 | * tg_pt_gp_mem is associated with a single |
c66ac9db NB |
1863 | * se_port->sep_alua_tg_pt_gp_mem, and is released via |
1864 | * core_alua_free_tg_pt_gp_mem(). | |
1865 | * | |
1866 | * If the passed tg_pt_gp does NOT match the default_tg_pt_gp, | |
f1ae05d5 | 1867 | * assume we want to re-associate a given tg_pt_gp_mem with |
c66ac9db NB |
1868 | * default_tg_pt_gp. |
1869 | */ | |
1870 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
0fd97ccf | 1871 | if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) { |
c66ac9db | 1872 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, |
0fd97ccf | 1873 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db NB |
1874 | } else |
1875 | tg_pt_gp_mem->tg_pt_gp = NULL; | |
1876 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1877 | ||
1878 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1879 | } | |
1880 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1881 | ||
1882 | kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp); | |
1883 | } | |
1884 | ||
1885 | void core_alua_free_tg_pt_gp_mem(struct se_port *port) | |
1886 | { | |
c66ac9db NB |
1887 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
1888 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
1889 | ||
c66ac9db | 1890 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
6708bb27 | 1891 | if (!tg_pt_gp_mem) |
c66ac9db NB |
1892 | return; |
1893 | ||
1894 | while (atomic_read(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt)) | |
1895 | cpu_relax(); | |
1896 | ||
1897 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1898 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 1899 | if (tg_pt_gp) { |
c66ac9db NB |
1900 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
1901 | if (tg_pt_gp_mem->tg_pt_gp_assoc) { | |
1902 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1903 | tg_pt_gp->tg_pt_gp_members--; | |
1904 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; | |
1905 | } | |
1906 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1907 | tg_pt_gp_mem->tg_pt_gp = NULL; | |
1908 | } | |
1909 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1910 | ||
1911 | kmem_cache_free(t10_alua_tg_pt_gp_mem_cache, tg_pt_gp_mem); | |
1912 | } | |
1913 | ||
1914 | static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name( | |
0fd97ccf | 1915 | struct se_device *dev, const char *name) |
c66ac9db NB |
1916 | { |
1917 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1918 | struct config_item *ci; | |
1919 | ||
0fd97ccf CH |
1920 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
1921 | list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list, | |
c66ac9db | 1922 | tg_pt_gp_list) { |
6708bb27 | 1923 | if (!tg_pt_gp->tg_pt_gp_valid_id) |
c66ac9db NB |
1924 | continue; |
1925 | ci = &tg_pt_gp->tg_pt_gp_group.cg_item; | |
6708bb27 | 1926 | if (!strcmp(config_item_name(ci), name)) { |
c66ac9db | 1927 | atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1928 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1929 | return tg_pt_gp; |
1930 | } | |
1931 | } | |
0fd97ccf | 1932 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1933 | |
1934 | return NULL; | |
1935 | } | |
1936 | ||
1937 | static void core_alua_put_tg_pt_gp_from_name( | |
1938 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1939 | { | |
0fd97ccf | 1940 | struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; |
c66ac9db | 1941 | |
0fd97ccf | 1942 | spin_lock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db | 1943 | atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt); |
0fd97ccf | 1944 | spin_unlock(&dev->t10_alua.tg_pt_gps_lock); |
c66ac9db NB |
1945 | } |
1946 | ||
1947 | /* | |
1948 | * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held | |
1949 | */ | |
1950 | void __core_alua_attach_tg_pt_gp_mem( | |
1951 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1952 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1953 | { | |
1954 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1955 | tg_pt_gp_mem->tg_pt_gp = tg_pt_gp; | |
1956 | tg_pt_gp_mem->tg_pt_gp_assoc = 1; | |
1957 | list_add_tail(&tg_pt_gp_mem->tg_pt_gp_mem_list, | |
1958 | &tg_pt_gp->tg_pt_gp_mem_list); | |
1959 | tg_pt_gp->tg_pt_gp_members++; | |
1960 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1961 | } | |
1962 | ||
1963 | /* | |
1964 | * Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held | |
1965 | */ | |
1966 | static void __core_alua_drop_tg_pt_gp_mem( | |
1967 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, | |
1968 | struct t10_alua_tg_pt_gp *tg_pt_gp) | |
1969 | { | |
1970 | spin_lock(&tg_pt_gp->tg_pt_gp_lock); | |
1971 | list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list); | |
1972 | tg_pt_gp_mem->tg_pt_gp = NULL; | |
1973 | tg_pt_gp_mem->tg_pt_gp_assoc = 0; | |
1974 | tg_pt_gp->tg_pt_gp_members--; | |
1975 | spin_unlock(&tg_pt_gp->tg_pt_gp_lock); | |
1976 | } | |
1977 | ||
1978 | ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page) | |
1979 | { | |
c66ac9db | 1980 | struct config_item *tg_pt_ci; |
c66ac9db NB |
1981 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
1982 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
1983 | ssize_t len = 0; | |
1984 | ||
c66ac9db | 1985 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
6708bb27 | 1986 | if (!tg_pt_gp_mem) |
c66ac9db NB |
1987 | return len; |
1988 | ||
1989 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
1990 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 1991 | if (tg_pt_gp) { |
c66ac9db NB |
1992 | tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item; |
1993 | len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:" | |
1994 | " %hu\nTG Port Primary Access State: %s\nTG Port " | |
1995 | "Primary Access Status: %s\nTG Port Secondary Access" | |
1996 | " State: %s\nTG Port Secondary Access Status: %s\n", | |
1997 | config_item_name(tg_pt_ci), tg_pt_gp->tg_pt_gp_id, | |
1998 | core_alua_dump_state(atomic_read( | |
1999 | &tg_pt_gp->tg_pt_gp_alua_access_state)), | |
2000 | core_alua_dump_status( | |
2001 | tg_pt_gp->tg_pt_gp_alua_access_status), | |
2002 | (atomic_read(&port->sep_tg_pt_secondary_offline)) ? | |
2003 | "Offline" : "None", | |
2004 | core_alua_dump_status(port->sep_tg_pt_secondary_stat)); | |
2005 | } | |
2006 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
2007 | ||
2008 | return len; | |
2009 | } | |
2010 | ||
2011 | ssize_t core_alua_store_tg_pt_gp_info( | |
2012 | struct se_port *port, | |
2013 | const char *page, | |
2014 | size_t count) | |
2015 | { | |
2016 | struct se_portal_group *tpg; | |
2017 | struct se_lun *lun; | |
0fd97ccf | 2018 | struct se_device *dev = port->sep_lun->lun_se_dev; |
c66ac9db NB |
2019 | struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL; |
2020 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
2021 | unsigned char buf[TG_PT_GROUP_NAME_BUF]; | |
2022 | int move = 0; | |
2023 | ||
2024 | tpg = port->sep_tpg; | |
2025 | lun = port->sep_lun; | |
2026 | ||
c87fbd56 CH |
2027 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
2028 | if (!tg_pt_gp_mem) | |
2029 | return 0; | |
c66ac9db NB |
2030 | |
2031 | if (count > TG_PT_GROUP_NAME_BUF) { | |
6708bb27 | 2032 | pr_err("ALUA Target Port Group alias too large!\n"); |
c66ac9db NB |
2033 | return -EINVAL; |
2034 | } | |
2035 | memset(buf, 0, TG_PT_GROUP_NAME_BUF); | |
2036 | memcpy(buf, page, count); | |
2037 | /* | |
2038 | * Any ALUA target port group alias besides "NULL" means we will be | |
2039 | * making a new group association. | |
2040 | */ | |
2041 | if (strcmp(strstrip(buf), "NULL")) { | |
2042 | /* | |
2043 | * core_alua_get_tg_pt_gp_by_name() will increment reference to | |
2044 | * struct t10_alua_tg_pt_gp. This reference is released with | |
2045 | * core_alua_put_tg_pt_gp_from_name() below. | |
2046 | */ | |
0fd97ccf | 2047 | tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev, |
c66ac9db | 2048 | strstrip(buf)); |
6708bb27 | 2049 | if (!tg_pt_gp_new) |
c66ac9db NB |
2050 | return -ENODEV; |
2051 | } | |
c66ac9db NB |
2052 | |
2053 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
2054 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 2055 | if (tg_pt_gp) { |
c66ac9db NB |
2056 | /* |
2057 | * Clearing an existing tg_pt_gp association, and replacing | |
2058 | * with the default_tg_pt_gp. | |
2059 | */ | |
6708bb27 AG |
2060 | if (!tg_pt_gp_new) { |
2061 | pr_debug("Target_Core_ConfigFS: Moving" | |
c66ac9db NB |
2062 | " %s/tpgt_%hu/%s from ALUA Target Port Group:" |
2063 | " alua/%s, ID: %hu back to" | |
2064 | " default_tg_pt_gp\n", | |
e3d6f909 AG |
2065 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2066 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2067 | config_item_name(&lun->lun_group.cg_item), |
2068 | config_item_name( | |
2069 | &tg_pt_gp->tg_pt_gp_group.cg_item), | |
2070 | tg_pt_gp->tg_pt_gp_id); | |
2071 | ||
2072 | __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp); | |
2073 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, | |
0fd97ccf | 2074 | dev->t10_alua.default_tg_pt_gp); |
c66ac9db NB |
2075 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
2076 | ||
2077 | return count; | |
2078 | } | |
2079 | /* | |
2080 | * Removing existing association of tg_pt_gp_mem with tg_pt_gp | |
2081 | */ | |
2082 | __core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp); | |
2083 | move = 1; | |
2084 | } | |
2085 | /* | |
2086 | * Associate tg_pt_gp_mem with tg_pt_gp_new. | |
2087 | */ | |
2088 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp_new); | |
2089 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
6708bb27 | 2090 | pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA" |
c66ac9db | 2091 | " Target Port Group: alua/%s, ID: %hu\n", (move) ? |
e3d6f909 AG |
2092 | "Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
2093 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
2094 | config_item_name(&lun->lun_group.cg_item), |
2095 | config_item_name(&tg_pt_gp_new->tg_pt_gp_group.cg_item), | |
2096 | tg_pt_gp_new->tg_pt_gp_id); | |
2097 | ||
2098 | core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new); | |
2099 | return count; | |
2100 | } | |
2101 | ||
2102 | ssize_t core_alua_show_access_type( | |
2103 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2104 | char *page) | |
2105 | { | |
125d0119 HR |
2106 | if ((tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) && |
2107 | (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) | |
2108 | return sprintf(page, "Implicit and Explicit\n"); | |
2109 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA) | |
2110 | return sprintf(page, "Implicit\n"); | |
2111 | else if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA) | |
2112 | return sprintf(page, "Explicit\n"); | |
c66ac9db NB |
2113 | else |
2114 | return sprintf(page, "None\n"); | |
2115 | } | |
2116 | ||
2117 | ssize_t core_alua_store_access_type( | |
2118 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2119 | const char *page, | |
2120 | size_t count) | |
2121 | { | |
2122 | unsigned long tmp; | |
2123 | int ret; | |
2124 | ||
57103d7f | 2125 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2126 | if (ret < 0) { |
6708bb27 | 2127 | pr_err("Unable to extract alua_access_type\n"); |
57103d7f | 2128 | return ret; |
c66ac9db NB |
2129 | } |
2130 | if ((tmp != 0) && (tmp != 1) && (tmp != 2) && (tmp != 3)) { | |
6708bb27 | 2131 | pr_err("Illegal value for alua_access_type:" |
c66ac9db NB |
2132 | " %lu\n", tmp); |
2133 | return -EINVAL; | |
2134 | } | |
2135 | if (tmp == 3) | |
2136 | tg_pt_gp->tg_pt_gp_alua_access_type = | |
125d0119 | 2137 | TPGS_IMPLICIT_ALUA | TPGS_EXPLICIT_ALUA; |
c66ac9db | 2138 | else if (tmp == 2) |
125d0119 | 2139 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_EXPLICIT_ALUA; |
c66ac9db | 2140 | else if (tmp == 1) |
125d0119 | 2141 | tg_pt_gp->tg_pt_gp_alua_access_type = TPGS_IMPLICIT_ALUA; |
c66ac9db NB |
2142 | else |
2143 | tg_pt_gp->tg_pt_gp_alua_access_type = 0; | |
2144 | ||
2145 | return count; | |
2146 | } | |
2147 | ||
2148 | ssize_t core_alua_show_nonop_delay_msecs( | |
2149 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2150 | char *page) | |
2151 | { | |
2152 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_nonop_delay_msecs); | |
2153 | } | |
2154 | ||
2155 | ssize_t core_alua_store_nonop_delay_msecs( | |
2156 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2157 | const char *page, | |
2158 | size_t count) | |
2159 | { | |
2160 | unsigned long tmp; | |
2161 | int ret; | |
2162 | ||
57103d7f | 2163 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2164 | if (ret < 0) { |
6708bb27 | 2165 | pr_err("Unable to extract nonop_delay_msecs\n"); |
57103d7f | 2166 | return ret; |
c66ac9db NB |
2167 | } |
2168 | if (tmp > ALUA_MAX_NONOP_DELAY_MSECS) { | |
6708bb27 | 2169 | pr_err("Passed nonop_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2170 | " ALUA_MAX_NONOP_DELAY_MSECS: %d\n", tmp, |
2171 | ALUA_MAX_NONOP_DELAY_MSECS); | |
2172 | return -EINVAL; | |
2173 | } | |
2174 | tg_pt_gp->tg_pt_gp_nonop_delay_msecs = (int)tmp; | |
2175 | ||
2176 | return count; | |
2177 | } | |
2178 | ||
2179 | ssize_t core_alua_show_trans_delay_msecs( | |
2180 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2181 | char *page) | |
2182 | { | |
2183 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_trans_delay_msecs); | |
2184 | } | |
2185 | ||
2186 | ssize_t core_alua_store_trans_delay_msecs( | |
2187 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2188 | const char *page, | |
2189 | size_t count) | |
2190 | { | |
2191 | unsigned long tmp; | |
2192 | int ret; | |
2193 | ||
57103d7f | 2194 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2195 | if (ret < 0) { |
6708bb27 | 2196 | pr_err("Unable to extract trans_delay_msecs\n"); |
57103d7f | 2197 | return ret; |
c66ac9db NB |
2198 | } |
2199 | if (tmp > ALUA_MAX_TRANS_DELAY_MSECS) { | |
6708bb27 | 2200 | pr_err("Passed trans_delay_msecs: %lu, exceeds" |
c66ac9db NB |
2201 | " ALUA_MAX_TRANS_DELAY_MSECS: %d\n", tmp, |
2202 | ALUA_MAX_TRANS_DELAY_MSECS); | |
2203 | return -EINVAL; | |
2204 | } | |
2205 | tg_pt_gp->tg_pt_gp_trans_delay_msecs = (int)tmp; | |
2206 | ||
2207 | return count; | |
2208 | } | |
2209 | ||
125d0119 | 2210 | ssize_t core_alua_show_implicit_trans_secs( |
5b9a4d72 NB |
2211 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2212 | char *page) | |
2213 | { | |
125d0119 | 2214 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_implicit_trans_secs); |
5b9a4d72 NB |
2215 | } |
2216 | ||
125d0119 | 2217 | ssize_t core_alua_store_implicit_trans_secs( |
5b9a4d72 NB |
2218 | struct t10_alua_tg_pt_gp *tg_pt_gp, |
2219 | const char *page, | |
2220 | size_t count) | |
2221 | { | |
2222 | unsigned long tmp; | |
2223 | int ret; | |
2224 | ||
57103d7f | 2225 | ret = kstrtoul(page, 0, &tmp); |
5b9a4d72 | 2226 | if (ret < 0) { |
125d0119 | 2227 | pr_err("Unable to extract implicit_trans_secs\n"); |
57103d7f | 2228 | return ret; |
5b9a4d72 | 2229 | } |
125d0119 HR |
2230 | if (tmp > ALUA_MAX_IMPLICIT_TRANS_SECS) { |
2231 | pr_err("Passed implicit_trans_secs: %lu, exceeds" | |
2232 | " ALUA_MAX_IMPLICIT_TRANS_SECS: %d\n", tmp, | |
2233 | ALUA_MAX_IMPLICIT_TRANS_SECS); | |
5b9a4d72 NB |
2234 | return -EINVAL; |
2235 | } | |
125d0119 | 2236 | tg_pt_gp->tg_pt_gp_implicit_trans_secs = (int)tmp; |
5b9a4d72 NB |
2237 | |
2238 | return count; | |
2239 | } | |
2240 | ||
c66ac9db NB |
2241 | ssize_t core_alua_show_preferred_bit( |
2242 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2243 | char *page) | |
2244 | { | |
2245 | return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_pref); | |
2246 | } | |
2247 | ||
2248 | ssize_t core_alua_store_preferred_bit( | |
2249 | struct t10_alua_tg_pt_gp *tg_pt_gp, | |
2250 | const char *page, | |
2251 | size_t count) | |
2252 | { | |
2253 | unsigned long tmp; | |
2254 | int ret; | |
2255 | ||
57103d7f | 2256 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2257 | if (ret < 0) { |
6708bb27 | 2258 | pr_err("Unable to extract preferred ALUA value\n"); |
57103d7f | 2259 | return ret; |
c66ac9db NB |
2260 | } |
2261 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2262 | pr_err("Illegal value for preferred ALUA: %lu\n", tmp); |
c66ac9db NB |
2263 | return -EINVAL; |
2264 | } | |
2265 | tg_pt_gp->tg_pt_gp_pref = (int)tmp; | |
2266 | ||
2267 | return count; | |
2268 | } | |
2269 | ||
2270 | ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page) | |
2271 | { | |
6708bb27 | 2272 | if (!lun->lun_sep) |
c66ac9db NB |
2273 | return -ENODEV; |
2274 | ||
2275 | return sprintf(page, "%d\n", | |
2276 | atomic_read(&lun->lun_sep->sep_tg_pt_secondary_offline)); | |
2277 | } | |
2278 | ||
2279 | ssize_t core_alua_store_offline_bit( | |
2280 | struct se_lun *lun, | |
2281 | const char *page, | |
2282 | size_t count) | |
2283 | { | |
2284 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
2285 | unsigned long tmp; | |
2286 | int ret; | |
2287 | ||
6708bb27 | 2288 | if (!lun->lun_sep) |
c66ac9db NB |
2289 | return -ENODEV; |
2290 | ||
57103d7f | 2291 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2292 | if (ret < 0) { |
6708bb27 | 2293 | pr_err("Unable to extract alua_tg_pt_offline value\n"); |
57103d7f | 2294 | return ret; |
c66ac9db NB |
2295 | } |
2296 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2297 | pr_err("Illegal value for alua_tg_pt_offline: %lu\n", |
c66ac9db NB |
2298 | tmp); |
2299 | return -EINVAL; | |
2300 | } | |
2301 | tg_pt_gp_mem = lun->lun_sep->sep_alua_tg_pt_gp_mem; | |
6708bb27 AG |
2302 | if (!tg_pt_gp_mem) { |
2303 | pr_err("Unable to locate *tg_pt_gp_mem\n"); | |
c66ac9db NB |
2304 | return -EINVAL; |
2305 | } | |
2306 | ||
2307 | ret = core_alua_set_tg_pt_secondary_state(tg_pt_gp_mem, | |
2308 | lun->lun_sep, 0, (int)tmp); | |
2309 | if (ret < 0) | |
2310 | return -EINVAL; | |
2311 | ||
2312 | return count; | |
2313 | } | |
2314 | ||
2315 | ssize_t core_alua_show_secondary_status( | |
2316 | struct se_lun *lun, | |
2317 | char *page) | |
2318 | { | |
2319 | return sprintf(page, "%d\n", lun->lun_sep->sep_tg_pt_secondary_stat); | |
2320 | } | |
2321 | ||
2322 | ssize_t core_alua_store_secondary_status( | |
2323 | struct se_lun *lun, | |
2324 | const char *page, | |
2325 | size_t count) | |
2326 | { | |
2327 | unsigned long tmp; | |
2328 | int ret; | |
2329 | ||
57103d7f | 2330 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2331 | if (ret < 0) { |
6708bb27 | 2332 | pr_err("Unable to extract alua_tg_pt_status\n"); |
57103d7f | 2333 | return ret; |
c66ac9db NB |
2334 | } |
2335 | if ((tmp != ALUA_STATUS_NONE) && | |
125d0119 HR |
2336 | (tmp != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && |
2337 | (tmp != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { | |
6708bb27 | 2338 | pr_err("Illegal value for alua_tg_pt_status: %lu\n", |
c66ac9db NB |
2339 | tmp); |
2340 | return -EINVAL; | |
2341 | } | |
2342 | lun->lun_sep->sep_tg_pt_secondary_stat = (int)tmp; | |
2343 | ||
2344 | return count; | |
2345 | } | |
2346 | ||
2347 | ssize_t core_alua_show_secondary_write_metadata( | |
2348 | struct se_lun *lun, | |
2349 | char *page) | |
2350 | { | |
2351 | return sprintf(page, "%d\n", | |
2352 | lun->lun_sep->sep_tg_pt_secondary_write_md); | |
2353 | } | |
2354 | ||
2355 | ssize_t core_alua_store_secondary_write_metadata( | |
2356 | struct se_lun *lun, | |
2357 | const char *page, | |
2358 | size_t count) | |
2359 | { | |
2360 | unsigned long tmp; | |
2361 | int ret; | |
2362 | ||
57103d7f | 2363 | ret = kstrtoul(page, 0, &tmp); |
c66ac9db | 2364 | if (ret < 0) { |
6708bb27 | 2365 | pr_err("Unable to extract alua_tg_pt_write_md\n"); |
57103d7f | 2366 | return ret; |
c66ac9db NB |
2367 | } |
2368 | if ((tmp != 0) && (tmp != 1)) { | |
6708bb27 | 2369 | pr_err("Illegal value for alua_tg_pt_write_md:" |
c66ac9db NB |
2370 | " %lu\n", tmp); |
2371 | return -EINVAL; | |
2372 | } | |
2373 | lun->lun_sep->sep_tg_pt_secondary_write_md = (int)tmp; | |
2374 | ||
2375 | return count; | |
2376 | } | |
2377 | ||
0fd97ccf | 2378 | int core_setup_alua(struct se_device *dev) |
c66ac9db | 2379 | { |
a3541703 | 2380 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && |
c87fbd56 CH |
2381 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
2382 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
0fd97ccf | 2383 | |
c66ac9db | 2384 | /* |
25985edc | 2385 | * Associate this struct se_device with the default ALUA |
c66ac9db NB |
2386 | * LUN Group. |
2387 | */ | |
2388 | lu_gp_mem = core_alua_allocate_lu_gp_mem(dev); | |
e3d6f909 AG |
2389 | if (IS_ERR(lu_gp_mem)) |
2390 | return PTR_ERR(lu_gp_mem); | |
c66ac9db | 2391 | |
c66ac9db NB |
2392 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
2393 | __core_alua_attach_lu_gp_mem(lu_gp_mem, | |
e3d6f909 | 2394 | default_lu_gp); |
c66ac9db NB |
2395 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
2396 | ||
6708bb27 | 2397 | pr_debug("%s: Adding to default ALUA LU Group:" |
c66ac9db | 2398 | " core/alua/lu_gps/default_lu_gp\n", |
e3d6f909 | 2399 | dev->transport->name); |
c66ac9db NB |
2400 | } |
2401 | ||
2402 | return 0; | |
2403 | } |