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Commit | Line | Data |
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b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd 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, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd 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 drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/connector.h> | |
33 | #include <linux/blkpg.h> | |
34 | #include <linux/cpumask.h> | |
35 | #include "drbd_int.h" | |
265be2d0 | 36 | #include "drbd_req.h" |
b411b363 PR |
37 | #include "drbd_wrappers.h" |
38 | #include <asm/unaligned.h> | |
39 | #include <linux/drbd_tag_magic.h> | |
40 | #include <linux/drbd_limits.h> | |
87f7be4c PR |
41 | #include <linux/compiler.h> |
42 | #include <linux/kthread.h> | |
b411b363 PR |
43 | |
44 | static unsigned short *tl_add_blob(unsigned short *, enum drbd_tags, const void *, int); | |
45 | static unsigned short *tl_add_str(unsigned short *, enum drbd_tags, const char *); | |
46 | static unsigned short *tl_add_int(unsigned short *, enum drbd_tags, const void *); | |
47 | ||
48 | /* see get_sb_bdev and bd_claim */ | |
49 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; | |
50 | ||
51 | /* Generate the tag_list to struct functions */ | |
52 | #define NL_PACKET(name, number, fields) \ | |
3f9cbe93 | 53 | static int name ## _from_tags( \ |
b411b363 | 54 | unsigned short *tags, struct name *arg) __attribute__ ((unused)); \ |
3f9cbe93 | 55 | static int name ## _from_tags( \ |
b411b363 PR |
56 | unsigned short *tags, struct name *arg) \ |
57 | { \ | |
58 | int tag; \ | |
59 | int dlen; \ | |
60 | \ | |
61 | while ((tag = get_unaligned(tags++)) != TT_END) { \ | |
62 | dlen = get_unaligned(tags++); \ | |
63 | switch (tag_number(tag)) { \ | |
64 | fields \ | |
65 | default: \ | |
66 | if (tag & T_MANDATORY) { \ | |
3f9cbe93 | 67 | printk(KERN_ERR "drbd: Unknown tag: %d\n", tag_number(tag)); \ |
b411b363 PR |
68 | return 0; \ |
69 | } \ | |
70 | } \ | |
71 | tags = (unsigned short *)((char *)tags + dlen); \ | |
72 | } \ | |
73 | return 1; \ | |
74 | } | |
75 | #define NL_INTEGER(pn, pr, member) \ | |
76 | case pn: /* D_ASSERT( tag_type(tag) == TT_INTEGER ); */ \ | |
77 | arg->member = get_unaligned((int *)(tags)); \ | |
78 | break; | |
79 | #define NL_INT64(pn, pr, member) \ | |
80 | case pn: /* D_ASSERT( tag_type(tag) == TT_INT64 ); */ \ | |
81 | arg->member = get_unaligned((u64 *)(tags)); \ | |
82 | break; | |
83 | #define NL_BIT(pn, pr, member) \ | |
84 | case pn: /* D_ASSERT( tag_type(tag) == TT_BIT ); */ \ | |
85 | arg->member = *(char *)(tags) ? 1 : 0; \ | |
86 | break; | |
87 | #define NL_STRING(pn, pr, member, len) \ | |
88 | case pn: /* D_ASSERT( tag_type(tag) == TT_STRING ); */ \ | |
89 | if (dlen > len) { \ | |
3f9cbe93 | 90 | printk(KERN_ERR "drbd: arg too long: %s (%u wanted, max len: %u bytes)\n", \ |
b411b363 PR |
91 | #member, dlen, (unsigned int)len); \ |
92 | return 0; \ | |
93 | } \ | |
94 | arg->member ## _len = dlen; \ | |
95 | memcpy(arg->member, tags, min_t(size_t, dlen, len)); \ | |
96 | break; | |
97 | #include "linux/drbd_nl.h" | |
98 | ||
99 | /* Generate the struct to tag_list functions */ | |
100 | #define NL_PACKET(name, number, fields) \ | |
101 | static unsigned short* \ | |
3f9cbe93 | 102 | name ## _to_tags( \ |
b411b363 PR |
103 | struct name *arg, unsigned short *tags) __attribute__ ((unused)); \ |
104 | static unsigned short* \ | |
3f9cbe93 | 105 | name ## _to_tags( \ |
b411b363 PR |
106 | struct name *arg, unsigned short *tags) \ |
107 | { \ | |
108 | fields \ | |
109 | return tags; \ | |
110 | } | |
111 | ||
112 | #define NL_INTEGER(pn, pr, member) \ | |
113 | put_unaligned(pn | pr | TT_INTEGER, tags++); \ | |
114 | put_unaligned(sizeof(int), tags++); \ | |
115 | put_unaligned(arg->member, (int *)tags); \ | |
116 | tags = (unsigned short *)((char *)tags+sizeof(int)); | |
117 | #define NL_INT64(pn, pr, member) \ | |
118 | put_unaligned(pn | pr | TT_INT64, tags++); \ | |
119 | put_unaligned(sizeof(u64), tags++); \ | |
120 | put_unaligned(arg->member, (u64 *)tags); \ | |
121 | tags = (unsigned short *)((char *)tags+sizeof(u64)); | |
122 | #define NL_BIT(pn, pr, member) \ | |
123 | put_unaligned(pn | pr | TT_BIT, tags++); \ | |
124 | put_unaligned(sizeof(char), tags++); \ | |
125 | *(char *)tags = arg->member; \ | |
126 | tags = (unsigned short *)((char *)tags+sizeof(char)); | |
127 | #define NL_STRING(pn, pr, member, len) \ | |
128 | put_unaligned(pn | pr | TT_STRING, tags++); \ | |
129 | put_unaligned(arg->member ## _len, tags++); \ | |
130 | memcpy(tags, arg->member, arg->member ## _len); \ | |
131 | tags = (unsigned short *)((char *)tags + arg->member ## _len); | |
132 | #include "linux/drbd_nl.h" | |
133 | ||
134 | void drbd_bcast_ev_helper(struct drbd_conf *mdev, char *helper_name); | |
135 | void drbd_nl_send_reply(struct cn_msg *, int); | |
136 | ||
137 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
138 | { | |
139 | char *envp[] = { "HOME=/", | |
140 | "TERM=linux", | |
141 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
142 | NULL, /* Will be set to address family */ | |
143 | NULL, /* Will be set to address */ | |
144 | NULL }; | |
145 | ||
146 | char mb[12], af[20], ad[60], *afs; | |
147 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
148 | int ret; | |
149 | ||
150 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
151 | ||
b2fb6dbe | 152 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 153 | switch (((struct sockaddr *)mdev->tconn->net_conf->peer_addr)->sa_family) { |
b411b363 PR |
154 | case AF_INET6: |
155 | afs = "ipv6"; | |
156 | snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI6", | |
89e58e75 | 157 | &((struct sockaddr_in6 *)mdev->tconn->net_conf->peer_addr)->sin6_addr); |
b411b363 PR |
158 | break; |
159 | case AF_INET: | |
160 | afs = "ipv4"; | |
161 | snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4", | |
89e58e75 | 162 | &((struct sockaddr_in *)mdev->tconn->net_conf->peer_addr)->sin_addr); |
b411b363 PR |
163 | break; |
164 | default: | |
165 | afs = "ssocks"; | |
166 | snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4", | |
89e58e75 | 167 | &((struct sockaddr_in *)mdev->tconn->net_conf->peer_addr)->sin_addr); |
b411b363 PR |
168 | } |
169 | snprintf(af, 20, "DRBD_PEER_AF=%s", afs); | |
170 | envp[3]=af; | |
171 | envp[4]=ad; | |
b2fb6dbe | 172 | put_net_conf(mdev->tconn); |
b411b363 PR |
173 | } |
174 | ||
1090c056 LE |
175 | /* The helper may take some time. |
176 | * write out any unsynced meta data changes now */ | |
177 | drbd_md_sync(mdev); | |
178 | ||
b411b363 PR |
179 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
180 | ||
181 | drbd_bcast_ev_helper(mdev, cmd); | |
182 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
183 | if (ret) | |
184 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
185 | usermode_helper, cmd, mb, | |
186 | (ret >> 8) & 0xff, ret); | |
187 | else | |
188 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
189 | usermode_helper, cmd, mb, | |
190 | (ret >> 8) & 0xff, ret); | |
191 | ||
192 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
193 | ret = 0; | |
194 | ||
195 | return ret; | |
196 | } | |
197 | ||
198 | enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev) | |
199 | { | |
200 | char *ex_to_string; | |
201 | int r; | |
202 | enum drbd_disk_state nps; | |
203 | enum drbd_fencing_p fp; | |
204 | ||
205 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
206 | ||
207 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
208 | fp = mdev->ldev->dc.fencing; | |
209 | put_ldev(mdev); | |
210 | } else { | |
211 | dev_warn(DEV, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 PR |
212 | nps = mdev->state.pdsk; |
213 | goto out; | |
b411b363 PR |
214 | } |
215 | ||
b411b363 PR |
216 | r = drbd_khelper(mdev, "fence-peer"); |
217 | ||
218 | switch ((r>>8) & 0xff) { | |
219 | case 3: /* peer is inconsistent */ | |
220 | ex_to_string = "peer is inconsistent or worse"; | |
221 | nps = D_INCONSISTENT; | |
222 | break; | |
223 | case 4: /* peer got outdated, or was already outdated */ | |
224 | ex_to_string = "peer was fenced"; | |
225 | nps = D_OUTDATED; | |
226 | break; | |
227 | case 5: /* peer was down */ | |
228 | if (mdev->state.disk == D_UP_TO_DATE) { | |
229 | /* we will(have) create(d) a new UUID anyways... */ | |
230 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
231 | nps = D_OUTDATED; | |
232 | } else { | |
233 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
234 | nps = mdev->state.pdsk; | |
235 | } | |
236 | break; | |
237 | case 6: /* Peer is primary, voluntarily outdate myself. | |
238 | * This is useful when an unconnected R_SECONDARY is asked to | |
239 | * become R_PRIMARY, but finds the other peer being active. */ | |
240 | ex_to_string = "peer is active"; | |
241 | dev_warn(DEV, "Peer is primary, outdating myself.\n"); | |
242 | nps = D_UNKNOWN; | |
243 | _drbd_request_state(mdev, NS(disk, D_OUTDATED), CS_WAIT_COMPLETE); | |
244 | break; | |
245 | case 7: | |
246 | if (fp != FP_STONITH) | |
247 | dev_err(DEV, "fence-peer() = 7 && fencing != Stonith !!!\n"); | |
248 | ex_to_string = "peer was stonithed"; | |
249 | nps = D_OUTDATED; | |
250 | break; | |
251 | default: | |
252 | /* The script is broken ... */ | |
253 | nps = D_UNKNOWN; | |
254 | dev_err(DEV, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); | |
255 | return nps; | |
256 | } | |
257 | ||
258 | dev_info(DEV, "fence-peer helper returned %d (%s)\n", | |
259 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 PR |
260 | |
261 | out: | |
262 | if (mdev->state.susp_fen && nps >= D_UNKNOWN) { | |
263 | /* The handler was not successful... unfreeze here, the | |
264 | state engine can not unfreeze... */ | |
265 | _drbd_request_state(mdev, NS(susp_fen, 0), CS_VERBOSE); | |
266 | } | |
267 | ||
b411b363 PR |
268 | return nps; |
269 | } | |
270 | ||
87f7be4c PR |
271 | static int _try_outdate_peer_async(void *data) |
272 | { | |
273 | struct drbd_conf *mdev = (struct drbd_conf *)data; | |
274 | enum drbd_disk_state nps; | |
21423fa7 | 275 | union drbd_state ns; |
87f7be4c PR |
276 | |
277 | nps = drbd_try_outdate_peer(mdev); | |
21423fa7 PR |
278 | |
279 | /* Not using | |
280 | drbd_request_state(mdev, NS(pdsk, nps)); | |
99432fcc PR |
281 | here, because we might were able to re-establish the connection |
282 | in the meantime. This can only partially be solved in the state's | |
283 | engine is_valid_state() and is_valid_state_transition() | |
284 | functions. | |
285 | ||
286 | nps can be D_INCONSISTENT, D_OUTDATED or D_UNKNOWN. | |
287 | pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid, | |
288 | therefore we have to have the pre state change check here. | |
21423fa7 | 289 | */ |
87eeee41 | 290 | spin_lock_irq(&mdev->tconn->req_lock); |
21423fa7 PR |
291 | ns = mdev->state; |
292 | if (ns.conn < C_WF_REPORT_PARAMS) { | |
293 | ns.pdsk = nps; | |
294 | _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
295 | } | |
87eeee41 | 296 | spin_unlock_irq(&mdev->tconn->req_lock); |
87f7be4c PR |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
301 | void drbd_try_outdate_peer_async(struct drbd_conf *mdev) | |
302 | { | |
303 | struct task_struct *opa; | |
304 | ||
305 | opa = kthread_run(_try_outdate_peer_async, mdev, "drbd%d_a_helper", mdev_to_minor(mdev)); | |
306 | if (IS_ERR(opa)) | |
307 | dev_err(DEV, "out of mem, failed to invoke fence-peer helper\n"); | |
308 | } | |
b411b363 | 309 | |
bf885f8a AG |
310 | enum drbd_state_rv |
311 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
312 | { |
313 | const int max_tries = 4; | |
bf885f8a | 314 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
b411b363 PR |
315 | int try = 0; |
316 | int forced = 0; | |
317 | union drbd_state mask, val; | |
318 | enum drbd_disk_state nps; | |
319 | ||
320 | if (new_role == R_PRIMARY) | |
0625ac19 | 321 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 322 | |
8410da8f | 323 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
324 | |
325 | mask.i = 0; mask.role = R_MASK; | |
326 | val.i = 0; val.role = new_role; | |
327 | ||
328 | while (try++ < max_tries) { | |
bf885f8a | 329 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
330 | |
331 | /* in case we first succeeded to outdate, | |
332 | * but now suddenly could establish a connection */ | |
bf885f8a | 333 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
334 | val.pdsk = 0; |
335 | mask.pdsk = 0; | |
336 | continue; | |
337 | } | |
338 | ||
bf885f8a | 339 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
340 | (mdev->state.disk < D_UP_TO_DATE && |
341 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
342 | mask.disk = D_MASK; |
343 | val.disk = D_UP_TO_DATE; | |
344 | forced = 1; | |
345 | continue; | |
346 | } | |
347 | ||
bf885f8a | 348 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
349 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
350 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
351 | nps = drbd_try_outdate_peer(mdev); | |
352 | ||
353 | if (nps == D_OUTDATED || nps == D_INCONSISTENT) { | |
354 | val.disk = D_UP_TO_DATE; | |
355 | mask.disk = D_MASK; | |
356 | } | |
357 | ||
358 | val.pdsk = nps; | |
359 | mask.pdsk = D_MASK; | |
360 | ||
361 | continue; | |
362 | } | |
363 | ||
bf885f8a | 364 | if (rv == SS_NOTHING_TO_DO) |
b411b363 | 365 | goto fail; |
bf885f8a | 366 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
b411b363 PR |
367 | nps = drbd_try_outdate_peer(mdev); |
368 | ||
369 | if (force && nps > D_OUTDATED) { | |
370 | dev_warn(DEV, "Forced into split brain situation!\n"); | |
371 | nps = D_OUTDATED; | |
372 | } | |
373 | ||
374 | mask.pdsk = D_MASK; | |
375 | val.pdsk = nps; | |
376 | ||
377 | continue; | |
378 | } | |
bf885f8a | 379 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
380 | /* Maybe the peer is detected as dead very soon... |
381 | retry at most once more in this case. */ | |
89e58e75 | 382 | schedule_timeout_interruptible((mdev->tconn->net_conf->ping_timeo+1)*HZ/10); |
b411b363 PR |
383 | if (try < max_tries) |
384 | try = max_tries - 1; | |
385 | continue; | |
386 | } | |
bf885f8a AG |
387 | if (rv < SS_SUCCESS) { |
388 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 389 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 390 | if (rv < SS_SUCCESS) |
b411b363 PR |
391 | goto fail; |
392 | } | |
393 | break; | |
394 | } | |
395 | ||
bf885f8a | 396 | if (rv < SS_SUCCESS) |
b411b363 PR |
397 | goto fail; |
398 | ||
399 | if (forced) | |
400 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
401 | ||
402 | /* Wait until nothing is on the fly :) */ | |
403 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
404 | ||
405 | if (new_role == R_SECONDARY) { | |
81e84650 | 406 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
407 | if (get_ldev(mdev)) { |
408 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
409 | put_ldev(mdev); | |
410 | } | |
411 | } else { | |
b2fb6dbe | 412 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 413 | mdev->tconn->net_conf->want_lose = 0; |
b2fb6dbe | 414 | put_net_conf(mdev->tconn); |
b411b363 | 415 | } |
81e84650 | 416 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
417 | if (get_ldev(mdev)) { |
418 | if (((mdev->state.conn < C_CONNECTED || | |
419 | mdev->state.pdsk <= D_FAILED) | |
420 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
421 | drbd_uuid_new_current(mdev); | |
422 | ||
423 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
424 | put_ldev(mdev); | |
425 | } | |
426 | } | |
427 | ||
19f843aa LE |
428 | /* writeout of activity log covered areas of the bitmap |
429 | * to stable storage done in after state change already */ | |
b411b363 PR |
430 | |
431 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
432 | /* if this was forced, we should consider sync */ | |
433 | if (forced) | |
434 | drbd_send_uuids(mdev); | |
435 | drbd_send_state(mdev); | |
436 | } | |
437 | ||
438 | drbd_md_sync(mdev); | |
439 | ||
440 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
441 | fail: | |
8410da8f | 442 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 443 | return rv; |
b411b363 PR |
444 | } |
445 | ||
b411b363 PR |
446 | static int drbd_nl_primary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, |
447 | struct drbd_nl_cfg_reply *reply) | |
448 | { | |
449 | struct primary primary_args; | |
450 | ||
451 | memset(&primary_args, 0, sizeof(struct primary)); | |
3f9cbe93 | 452 | if (!primary_from_tags(nlp->tag_list, &primary_args)) { |
b411b363 PR |
453 | reply->ret_code = ERR_MANDATORY_TAG; |
454 | return 0; | |
455 | } | |
456 | ||
457 | reply->ret_code = | |
1f552430 | 458 | drbd_set_role(mdev, R_PRIMARY, primary_args.primary_force); |
b411b363 PR |
459 | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static int drbd_nl_secondary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
464 | struct drbd_nl_cfg_reply *reply) | |
465 | { | |
466 | reply->ret_code = drbd_set_role(mdev, R_SECONDARY, 0); | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | /* initializes the md.*_offset members, so we are able to find | |
472 | * the on disk meta data */ | |
473 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
474 | struct drbd_backing_dev *bdev) | |
475 | { | |
476 | sector_t md_size_sect = 0; | |
477 | switch (bdev->dc.meta_dev_idx) { | |
478 | default: | |
479 | /* v07 style fixed size indexed meta data */ | |
480 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
481 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
482 | bdev->md.al_offset = MD_AL_OFFSET; | |
483 | bdev->md.bm_offset = MD_BM_OFFSET; | |
484 | break; | |
485 | case DRBD_MD_INDEX_FLEX_EXT: | |
486 | /* just occupy the full device; unit: sectors */ | |
487 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
488 | bdev->md.md_offset = 0; | |
489 | bdev->md.al_offset = MD_AL_OFFSET; | |
490 | bdev->md.bm_offset = MD_BM_OFFSET; | |
491 | break; | |
492 | case DRBD_MD_INDEX_INTERNAL: | |
493 | case DRBD_MD_INDEX_FLEX_INT: | |
494 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
495 | /* al size is still fixed */ | |
7ad651b5 | 496 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
497 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
498 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
499 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
500 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
501 | md_size_sect = ALIGN(md_size_sect, 8); | |
502 | ||
503 | /* plus the "drbd meta data super block", | |
504 | * and the activity log; */ | |
505 | md_size_sect += MD_BM_OFFSET; | |
506 | ||
507 | bdev->md.md_size_sect = md_size_sect; | |
508 | /* bitmap offset is adjusted by 'super' block size */ | |
509 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
510 | break; | |
511 | } | |
512 | } | |
513 | ||
4b0715f0 | 514 | /* input size is expected to be in KB */ |
b411b363 PR |
515 | char *ppsize(char *buf, unsigned long long size) |
516 | { | |
4b0715f0 LE |
517 | /* Needs 9 bytes at max including trailing NUL: |
518 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
519 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
520 | int base = 0; | |
4b0715f0 | 521 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
522 | /* shift + round */ |
523 | size = (size >> 10) + !!(size & (1<<9)); | |
524 | base++; | |
525 | } | |
4b0715f0 | 526 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
527 | |
528 | return buf; | |
529 | } | |
530 | ||
531 | /* there is still a theoretical deadlock when called from receiver | |
532 | * on an D_INCONSISTENT R_PRIMARY: | |
533 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
534 | * packet from remote to dec_ap_bio again. | |
535 | * receiver receive_sizes(), comes here, | |
536 | * waits for ap_bio_cnt == 0. -> deadlock. | |
537 | * but this cannot happen, actually, because: | |
538 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
539 | * (not connected, or bad/no disk on peer): | |
540 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
541 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
542 | * peer may not initiate a resize. | |
543 | */ | |
544 | void drbd_suspend_io(struct drbd_conf *mdev) | |
545 | { | |
546 | set_bit(SUSPEND_IO, &mdev->flags); | |
fb22c402 | 547 | if (is_susp(mdev->state)) |
265be2d0 | 548 | return; |
b411b363 PR |
549 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
550 | } | |
551 | ||
552 | void drbd_resume_io(struct drbd_conf *mdev) | |
553 | { | |
554 | clear_bit(SUSPEND_IO, &mdev->flags); | |
555 | wake_up(&mdev->misc_wait); | |
556 | } | |
557 | ||
558 | /** | |
559 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
560 | * @mdev: DRBD device. | |
561 | * | |
562 | * Returns 0 on success, negative return values indicate errors. | |
563 | * You should call drbd_md_sync() after calling this function. | |
564 | */ | |
24c4830c | 565 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
566 | { |
567 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
568 | sector_t la_size; | |
569 | sector_t size; | |
570 | char ppb[10]; | |
571 | ||
572 | int md_moved, la_size_changed; | |
573 | enum determine_dev_size rv = unchanged; | |
574 | ||
575 | /* race: | |
576 | * application request passes inc_ap_bio, | |
577 | * but then cannot get an AL-reference. | |
578 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
579 | * | |
580 | * to avoid that: | |
581 | * Suspend IO right here. | |
582 | * still lock the act_log to not trigger ASSERTs there. | |
583 | */ | |
584 | drbd_suspend_io(mdev); | |
585 | ||
586 | /* no wait necessary anymore, actually we could assert that */ | |
587 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
588 | ||
589 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
590 | prev_size = mdev->ldev->md.md_size_sect; | |
591 | la_size = mdev->ldev->md.la_size_sect; | |
592 | ||
593 | /* TODO: should only be some assert here, not (re)init... */ | |
594 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
595 | ||
d845030f | 596 | size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED); |
b411b363 PR |
597 | |
598 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
599 | drbd_bm_capacity(mdev) != size) { | |
600 | int err; | |
02d9a94b | 601 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
602 | if (unlikely(err)) { |
603 | /* currently there is only one error: ENOMEM! */ | |
604 | size = drbd_bm_capacity(mdev)>>1; | |
605 | if (size == 0) { | |
606 | dev_err(DEV, "OUT OF MEMORY! " | |
607 | "Could not allocate bitmap!\n"); | |
608 | } else { | |
609 | dev_err(DEV, "BM resizing failed. " | |
610 | "Leaving size unchanged at size = %lu KB\n", | |
611 | (unsigned long)size); | |
612 | } | |
613 | rv = dev_size_error; | |
614 | } | |
615 | /* racy, see comments above. */ | |
616 | drbd_set_my_capacity(mdev, size); | |
617 | mdev->ldev->md.la_size_sect = size; | |
618 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
619 | (unsigned long long)size>>1); | |
620 | } | |
621 | if (rv == dev_size_error) | |
622 | goto out; | |
623 | ||
624 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
625 | ||
626 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
627 | || prev_size != mdev->ldev->md.md_size_sect; | |
628 | ||
629 | if (la_size_changed || md_moved) { | |
24dccabb AG |
630 | int err; |
631 | ||
b411b363 PR |
632 | drbd_al_shrink(mdev); /* All extents inactive. */ |
633 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
634 | la_size_changed && md_moved ? "size changed and md moved" : | |
635 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
636 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
637 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
638 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
639 | if (err) { |
640 | rv = dev_size_error; | |
641 | goto out; | |
642 | } | |
b411b363 PR |
643 | drbd_md_mark_dirty(mdev); |
644 | } | |
645 | ||
646 | if (size > la_size) | |
647 | rv = grew; | |
648 | if (size < la_size) | |
649 | rv = shrunk; | |
650 | out: | |
651 | lc_unlock(mdev->act_log); | |
652 | wake_up(&mdev->al_wait); | |
653 | drbd_resume_io(mdev); | |
654 | ||
655 | return rv; | |
656 | } | |
657 | ||
658 | sector_t | |
a393db6f | 659 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space) |
b411b363 PR |
660 | { |
661 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
662 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
663 | sector_t m_size; /* my size */ | |
664 | sector_t u_size = bdev->dc.disk_size; /* size requested by user. */ | |
665 | sector_t size = 0; | |
666 | ||
667 | m_size = drbd_get_max_capacity(bdev); | |
668 | ||
a393db6f PR |
669 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
670 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
671 | p_size = m_size; | |
672 | } | |
673 | ||
b411b363 PR |
674 | if (p_size && m_size) { |
675 | size = min_t(sector_t, p_size, m_size); | |
676 | } else { | |
677 | if (la_size) { | |
678 | size = la_size; | |
679 | if (m_size && m_size < size) | |
680 | size = m_size; | |
681 | if (p_size && p_size < size) | |
682 | size = p_size; | |
683 | } else { | |
684 | if (m_size) | |
685 | size = m_size; | |
686 | if (p_size) | |
687 | size = p_size; | |
688 | } | |
689 | } | |
690 | ||
691 | if (size == 0) | |
692 | dev_err(DEV, "Both nodes diskless!\n"); | |
693 | ||
694 | if (u_size) { | |
695 | if (u_size > size) | |
696 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
697 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
698 | else | |
699 | size = u_size; | |
700 | } | |
701 | ||
702 | return size; | |
703 | } | |
704 | ||
705 | /** | |
706 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
707 | * @mdev: DRBD device. | |
708 | * | |
709 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
710 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
711 | * this function. | |
712 | */ | |
713 | static int drbd_check_al_size(struct drbd_conf *mdev) | |
714 | { | |
715 | struct lru_cache *n, *t; | |
716 | struct lc_element *e; | |
717 | unsigned int in_use; | |
718 | int i; | |
719 | ||
7ad651b5 LE |
720 | if (!expect(mdev->sync_conf.al_extents >= DRBD_AL_EXTENTS_MIN)) |
721 | mdev->sync_conf.al_extents = DRBD_AL_EXTENTS_MIN; | |
b411b363 PR |
722 | |
723 | if (mdev->act_log && | |
724 | mdev->act_log->nr_elements == mdev->sync_conf.al_extents) | |
725 | return 0; | |
726 | ||
727 | in_use = 0; | |
728 | t = mdev->act_log; | |
7ad651b5 | 729 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
b411b363 PR |
730 | mdev->sync_conf.al_extents, sizeof(struct lc_element), 0); |
731 | ||
732 | if (n == NULL) { | |
733 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
734 | return -ENOMEM; | |
735 | } | |
736 | spin_lock_irq(&mdev->al_lock); | |
737 | if (t) { | |
738 | for (i = 0; i < t->nr_elements; i++) { | |
739 | e = lc_element_by_index(t, i); | |
740 | if (e->refcnt) | |
741 | dev_err(DEV, "refcnt(%d)==%d\n", | |
742 | e->lc_number, e->refcnt); | |
743 | in_use += e->refcnt; | |
744 | } | |
745 | } | |
746 | if (!in_use) | |
747 | mdev->act_log = n; | |
748 | spin_unlock_irq(&mdev->al_lock); | |
749 | if (in_use) { | |
750 | dev_err(DEV, "Activity log still in use!\n"); | |
751 | lc_destroy(n); | |
752 | return -EBUSY; | |
753 | } else { | |
754 | if (t) | |
755 | lc_destroy(t); | |
756 | } | |
757 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
758 | return 0; | |
759 | } | |
760 | ||
99432fcc | 761 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
762 | { |
763 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
764 | int max_hw_sectors = max_bio_size >> 9; |
765 | int max_segments = 0; | |
766 | ||
767 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
768 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
769 | ||
770 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
771 | max_segments = mdev->ldev->dc.max_bio_bvecs; | |
772 | put_ldev(mdev); | |
773 | } | |
b411b363 | 774 | |
b411b363 | 775 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
776 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
777 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
778 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
779 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 780 | |
99432fcc PR |
781 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
782 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
783 | ||
784 | blk_queue_stack_limits(q, b); | |
785 | ||
786 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
787 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
788 | q->backing_dev_info.ra_pages, | |
789 | b->backing_dev_info.ra_pages); | |
790 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
791 | } | |
792 | put_ldev(mdev); | |
793 | } | |
794 | } | |
795 | ||
796 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
797 | { | |
798 | int now, new, local, peer; | |
799 | ||
800 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
801 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
802 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 803 | |
99432fcc PR |
804 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
805 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
806 | mdev->local_max_bio_size = local; | |
807 | put_ldev(mdev); | |
b411b363 | 808 | } |
99432fcc PR |
809 | |
810 | /* We may ignore peer limits if the peer is modern enough. | |
811 | Because new from 8.3.8 onwards the peer can use multiple | |
812 | BIOs for a single peer_request */ | |
813 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 814 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 815 | peer = mdev->peer_max_bio_size; |
31890f4a | 816 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
817 | peer = DRBD_MAX_SIZE_H80_PACKET; |
818 | else /* drbd 8.3.8 onwards */ | |
819 | peer = DRBD_MAX_BIO_SIZE; | |
820 | } | |
821 | ||
822 | new = min_t(int, local, peer); | |
823 | ||
824 | if (mdev->state.role == R_PRIMARY && new < now) | |
825 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
826 | ||
827 | if (new != now) | |
828 | dev_info(DEV, "max BIO size = %u\n", new); | |
829 | ||
830 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
831 | } |
832 | ||
833 | /* serialize deconfig (worker exiting, doing cleanup) | |
834 | * and reconfig (drbdsetup disk, drbdsetup net) | |
835 | * | |
c518d04f LE |
836 | * Wait for a potentially exiting worker, then restart it, |
837 | * or start a new one. Flush any pending work, there may still be an | |
838 | * after_state_change queued. | |
b411b363 | 839 | */ |
0e29d163 | 840 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 841 | { |
0e29d163 PR |
842 | wait_event(tconn->ping_wait, !test_and_set_bit(CONFIG_PENDING, &tconn->flags)); |
843 | wait_event(tconn->ping_wait, !test_bit(OBJECT_DYING, &tconn->flags)); | |
844 | drbd_thread_start(&tconn->worker); | |
845 | conn_flush_workqueue(tconn); | |
b411b363 PR |
846 | } |
847 | ||
848 | /* if still unconfigured, stops worker again. | |
849 | * if configured now, clears CONFIG_PENDING. | |
850 | * wakes potential waiters */ | |
0e29d163 | 851 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 852 | { |
0e29d163 PR |
853 | spin_lock_irq(&tconn->req_lock); |
854 | if (conn_all_vols_unconf(tconn)) { | |
855 | set_bit(OBJECT_DYING, &tconn->flags); | |
856 | drbd_thread_stop_nowait(&tconn->worker); | |
b411b363 | 857 | } else |
0e29d163 PR |
858 | clear_bit(CONFIG_PENDING, &tconn->flags); |
859 | spin_unlock_irq(&tconn->req_lock); | |
860 | wake_up(&tconn->ping_wait); | |
b411b363 PR |
861 | } |
862 | ||
0778286a PR |
863 | /* Make sure IO is suspended before calling this function(). */ |
864 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
865 | { | |
866 | int s = 0; | |
867 | ||
61610420 | 868 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
869 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
870 | return; | |
871 | } | |
872 | ||
61610420 | 873 | drbd_al_shrink(mdev); |
87eeee41 | 874 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
875 | if (mdev->state.conn < C_CONNECTED) |
876 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 877 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 878 | lc_unlock(mdev->act_log); |
0778286a PR |
879 | |
880 | if (s) | |
881 | dev_info(DEV, "Suspended AL updates\n"); | |
882 | } | |
883 | ||
b411b363 PR |
884 | /* does always return 0; |
885 | * interesting return code is in reply->ret_code */ | |
886 | static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
887 | struct drbd_nl_cfg_reply *reply) | |
888 | { | |
116676ca | 889 | enum drbd_ret_code retcode; |
b411b363 PR |
890 | enum determine_dev_size dd; |
891 | sector_t max_possible_sectors; | |
892 | sector_t min_md_device_sectors; | |
893 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
e525fd89 | 894 | struct block_device *bdev; |
b411b363 PR |
895 | struct lru_cache *resync_lru = NULL; |
896 | union drbd_state ns, os; | |
f2024e7c | 897 | enum drbd_state_rv rv; |
b411b363 | 898 | int cp_discovered = 0; |
b411b363 | 899 | |
0e29d163 | 900 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
901 | |
902 | /* if you want to reconfigure, please tear down first */ | |
903 | if (mdev->state.disk > D_DISKLESS) { | |
904 | retcode = ERR_DISK_CONFIGURED; | |
905 | goto fail; | |
906 | } | |
82f59cc6 LE |
907 | /* It may just now have detached because of IO error. Make sure |
908 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
909 | * e.g. if someone calls attach from the on-io-error handler, | |
910 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
911 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 PR |
912 | |
913 | /* allocation not in the IO path, cqueue thread context */ | |
914 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); | |
915 | if (!nbc) { | |
916 | retcode = ERR_NOMEM; | |
917 | goto fail; | |
918 | } | |
919 | ||
920 | nbc->dc.disk_size = DRBD_DISK_SIZE_SECT_DEF; | |
921 | nbc->dc.on_io_error = DRBD_ON_IO_ERROR_DEF; | |
922 | nbc->dc.fencing = DRBD_FENCING_DEF; | |
923 | nbc->dc.max_bio_bvecs = DRBD_MAX_BIO_BVECS_DEF; | |
924 | ||
3f9cbe93 | 925 | if (!disk_conf_from_tags(nlp->tag_list, &nbc->dc)) { |
b411b363 PR |
926 | retcode = ERR_MANDATORY_TAG; |
927 | goto fail; | |
928 | } | |
929 | ||
930 | if (nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { | |
931 | retcode = ERR_MD_IDX_INVALID; | |
932 | goto fail; | |
933 | } | |
934 | ||
b2fb6dbe | 935 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 936 | int prot = mdev->tconn->net_conf->wire_protocol; |
b2fb6dbe | 937 | put_net_conf(mdev->tconn); |
47ff2d0a PR |
938 | if (nbc->dc.fencing == FP_STONITH && prot == DRBD_PROT_A) { |
939 | retcode = ERR_STONITH_AND_PROT_A; | |
940 | goto fail; | |
941 | } | |
942 | } | |
943 | ||
d4d77629 TH |
944 | bdev = blkdev_get_by_path(nbc->dc.backing_dev, |
945 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); | |
e525fd89 | 946 | if (IS_ERR(bdev)) { |
b411b363 | 947 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev, |
e525fd89 | 948 | PTR_ERR(bdev)); |
b411b363 PR |
949 | retcode = ERR_OPEN_DISK; |
950 | goto fail; | |
951 | } | |
e525fd89 TH |
952 | nbc->backing_bdev = bdev; |
953 | ||
954 | /* | |
955 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
956 | * drbd sharing one meta device. TODO in that case, paranoia | |
957 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
958 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
959 | * should check it for you already; but if you don't, or | |
960 | * someone fooled it, we need to double check here) | |
961 | */ | |
d4d77629 TH |
962 | bdev = blkdev_get_by_path(nbc->dc.meta_dev, |
963 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
964 | (nbc->dc.meta_dev_idx < 0) ? | |
965 | (void *)mdev : (void *)drbd_m_holder); | |
e525fd89 | 966 | if (IS_ERR(bdev)) { |
b411b363 | 967 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev, |
e525fd89 | 968 | PTR_ERR(bdev)); |
b411b363 PR |
969 | retcode = ERR_OPEN_MD_DISK; |
970 | goto fail; | |
971 | } | |
e525fd89 | 972 | nbc->md_bdev = bdev; |
b411b363 | 973 | |
e525fd89 TH |
974 | if ((nbc->backing_bdev == nbc->md_bdev) != |
975 | (nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL || | |
976 | nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
977 | retcode = ERR_MD_IDX_INVALID; | |
b411b363 PR |
978 | goto fail; |
979 | } | |
980 | ||
981 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 982 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
983 | offsetof(struct bm_extent, lce)); |
984 | if (!resync_lru) { | |
985 | retcode = ERR_NOMEM; | |
e525fd89 | 986 | goto fail; |
b411b363 PR |
987 | } |
988 | ||
989 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
990 | drbd_md_set_sector_offsets(mdev, nbc); | |
991 | ||
992 | if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) { | |
993 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", | |
994 | (unsigned long long) drbd_get_max_capacity(nbc), | |
995 | (unsigned long long) nbc->dc.disk_size); | |
996 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 997 | goto fail; |
b411b363 PR |
998 | } |
999 | ||
1000 | if (nbc->dc.meta_dev_idx < 0) { | |
1001 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; | |
1002 | /* at least one MB, otherwise it does not make sense */ | |
1003 | min_md_device_sectors = (2<<10); | |
1004 | } else { | |
1005 | max_possible_sectors = DRBD_MAX_SECTORS; | |
1006 | min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1); | |
1007 | } | |
1008 | ||
b411b363 PR |
1009 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
1010 | retcode = ERR_MD_DISK_TO_SMALL; | |
1011 | dev_warn(DEV, "refusing attach: md-device too small, " | |
1012 | "at least %llu sectors needed for this meta-disk type\n", | |
1013 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1014 | goto fail; |
b411b363 PR |
1015 | } |
1016 | ||
1017 | /* Make sure the new disk is big enough | |
1018 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1019 | if (drbd_get_max_capacity(nbc) < | |
1020 | drbd_get_capacity(mdev->this_bdev)) { | |
1021 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1022 | goto fail; |
b411b363 PR |
1023 | } |
1024 | ||
1025 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1026 | ||
1352994b LE |
1027 | if (nbc->known_size > max_possible_sectors) { |
1028 | dev_warn(DEV, "==> truncating very big lower level device " | |
1029 | "to currently maximum possible %llu sectors <==\n", | |
1030 | (unsigned long long) max_possible_sectors); | |
1031 | if (nbc->dc.meta_dev_idx >= 0) | |
1032 | dev_warn(DEV, "==>> using internal or flexible " | |
1033 | "meta data may help <<==\n"); | |
1034 | } | |
1035 | ||
b411b363 PR |
1036 | drbd_suspend_io(mdev); |
1037 | /* also wait for the last barrier ack. */ | |
fb22c402 | 1038 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || is_susp(mdev->state)); |
b411b363 | 1039 | /* and for any other previously queued work */ |
a21e9298 | 1040 | drbd_flush_workqueue(mdev); |
b411b363 | 1041 | |
f2024e7c AG |
1042 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1043 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1044 | drbd_resume_io(mdev); |
f2024e7c | 1045 | if (rv < SS_SUCCESS) |
e525fd89 | 1046 | goto fail; |
b411b363 PR |
1047 | |
1048 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1049 | goto force_diskless; | |
1050 | ||
1051 | drbd_md_set_sector_offsets(mdev, nbc); | |
1052 | ||
1053 | if (!mdev->bitmap) { | |
1054 | if (drbd_bm_init(mdev)) { | |
1055 | retcode = ERR_NOMEM; | |
1056 | goto force_diskless_dec; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | retcode = drbd_md_read(mdev, nbc); | |
1061 | if (retcode != NO_ERROR) | |
1062 | goto force_diskless_dec; | |
1063 | ||
1064 | if (mdev->state.conn < C_CONNECTED && | |
1065 | mdev->state.role == R_PRIMARY && | |
1066 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1067 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1068 | (unsigned long long)mdev->ed_uuid); | |
1069 | retcode = ERR_DATA_NOT_CURRENT; | |
1070 | goto force_diskless_dec; | |
1071 | } | |
1072 | ||
1073 | /* Since we are diskless, fix the activity log first... */ | |
1074 | if (drbd_check_al_size(mdev)) { | |
1075 | retcode = ERR_NOMEM; | |
1076 | goto force_diskless_dec; | |
1077 | } | |
1078 | ||
1079 | /* Prevent shrinking of consistent devices ! */ | |
1080 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
a393db6f | 1081 | drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) { |
b411b363 PR |
1082 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
1083 | retcode = ERR_DISK_TO_SMALL; | |
1084 | goto force_diskless_dec; | |
1085 | } | |
1086 | ||
1087 | if (!drbd_al_read_log(mdev, nbc)) { | |
1088 | retcode = ERR_IO_MD_DISK; | |
1089 | goto force_diskless_dec; | |
1090 | } | |
1091 | ||
b411b363 PR |
1092 | /* Reset the "barriers don't work" bits here, then force meta data to |
1093 | * be written, to ensure we determine if barriers are supported. */ | |
1094 | if (nbc->dc.no_md_flush) | |
a8a4e51e | 1095 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1096 | else |
a8a4e51e | 1097 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1098 | |
1099 | /* Point of no return reached. | |
1100 | * Devices and memory are no longer released by error cleanup below. | |
1101 | * now mdev takes over responsibility, and the state engine should | |
1102 | * clean it up somewhere. */ | |
1103 | D_ASSERT(mdev->ldev == NULL); | |
1104 | mdev->ldev = nbc; | |
1105 | mdev->resync = resync_lru; | |
1106 | nbc = NULL; | |
1107 | resync_lru = NULL; | |
1108 | ||
2451fc3b PR |
1109 | mdev->write_ordering = WO_bdev_flush; |
1110 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1111 | |
1112 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1113 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1114 | else | |
1115 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1116 | ||
894c6a94 | 1117 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
fb22c402 | 1118 | !(mdev->state.role == R_PRIMARY && mdev->state.susp_nod)) { |
b411b363 PR |
1119 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1120 | cp_discovered = 1; | |
1121 | } | |
1122 | ||
1123 | mdev->send_cnt = 0; | |
1124 | mdev->recv_cnt = 0; | |
1125 | mdev->read_cnt = 0; | |
1126 | mdev->writ_cnt = 0; | |
1127 | ||
99432fcc | 1128 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1129 | |
1130 | /* If I am currently not R_PRIMARY, | |
1131 | * but meta data primary indicator is set, | |
1132 | * I just now recover from a hard crash, | |
1133 | * and have been R_PRIMARY before that crash. | |
1134 | * | |
1135 | * Now, if I had no connection before that crash | |
1136 | * (have been degraded R_PRIMARY), chances are that | |
1137 | * I won't find my peer now either. | |
1138 | * | |
1139 | * In that case, and _only_ in that case, | |
1140 | * we use the degr-wfc-timeout instead of the default, | |
1141 | * so we can automatically recover from a crash of a | |
1142 | * degraded but active "cluster" after a certain timeout. | |
1143 | */ | |
1144 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1145 | if (mdev->state.role != R_PRIMARY && | |
1146 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1147 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1148 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1149 | ||
24c4830c | 1150 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1151 | if (dd == dev_size_error) { |
1152 | retcode = ERR_NOMEM_BITMAP; | |
1153 | goto force_diskless_dec; | |
1154 | } else if (dd == grew) | |
1155 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1156 | ||
1157 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1158 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1159 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1160 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1161 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1162 | retcode = ERR_IO_MD_DISK; |
1163 | goto force_diskless_dec; | |
1164 | } | |
1165 | } else { | |
20ceb2b2 LE |
1166 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
1167 | "read from attaching", BM_LOCKED_MASK) < 0) { | |
b411b363 PR |
1168 | retcode = ERR_IO_MD_DISK; |
1169 | goto force_diskless_dec; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | if (cp_discovered) { | |
1174 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1175 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1176 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1177 | retcode = ERR_IO_MD_DISK; |
1178 | goto force_diskless_dec; | |
1179 | } | |
b411b363 PR |
1180 | } |
1181 | ||
0778286a PR |
1182 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1183 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1184 | ||
87eeee41 | 1185 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1186 | os = mdev->state; |
1187 | ns.i = os.i; | |
1188 | /* If MDF_CONSISTENT is not set go into inconsistent state, | |
1189 | otherwise investigate MDF_WasUpToDate... | |
1190 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1191 | otherwise into D_CONSISTENT state. | |
1192 | */ | |
1193 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1194 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1195 | ns.disk = D_CONSISTENT; | |
1196 | else | |
1197 | ns.disk = D_OUTDATED; | |
1198 | } else { | |
1199 | ns.disk = D_INCONSISTENT; | |
1200 | } | |
1201 | ||
1202 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1203 | ns.pdsk = D_OUTDATED; | |
1204 | ||
1205 | if ( ns.disk == D_CONSISTENT && | |
1206 | (ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE)) | |
1207 | ns.disk = D_UP_TO_DATE; | |
1208 | ||
1209 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1210 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1211 | this point, because drbd_request_state() modifies these | |
1212 | flags. */ | |
1213 | ||
1214 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1215 | state after the negotiation phase. */ | |
1216 | if (mdev->state.conn == C_CONNECTED) { | |
1217 | mdev->new_state_tmp.i = ns.i; | |
1218 | ns.i = os.i; | |
1219 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1220 | |
1221 | /* We expect to receive up-to-date UUIDs soon. | |
1222 | To avoid a race in receive_state, free p_uuid while | |
1223 | holding req_lock. I.e. atomic with the state change */ | |
1224 | kfree(mdev->p_uuid); | |
1225 | mdev->p_uuid = NULL; | |
b411b363 PR |
1226 | } |
1227 | ||
1228 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
1229 | ns = mdev->state; | |
87eeee41 | 1230 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1231 | |
1232 | if (rv < SS_SUCCESS) | |
1233 | goto force_diskless_dec; | |
1234 | ||
1235 | if (mdev->state.role == R_PRIMARY) | |
1236 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1237 | else | |
1238 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1239 | ||
1240 | drbd_md_mark_dirty(mdev); | |
1241 | drbd_md_sync(mdev); | |
1242 | ||
1243 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1244 | put_ldev(mdev); | |
1245 | reply->ret_code = retcode; | |
0e29d163 | 1246 | conn_reconfig_done(mdev->tconn); |
b411b363 PR |
1247 | return 0; |
1248 | ||
1249 | force_diskless_dec: | |
1250 | put_ldev(mdev); | |
1251 | force_diskless: | |
82f59cc6 | 1252 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1253 | drbd_md_sync(mdev); |
b411b363 PR |
1254 | fail: |
1255 | if (nbc) { | |
e525fd89 TH |
1256 | if (nbc->backing_bdev) |
1257 | blkdev_put(nbc->backing_bdev, | |
1258 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1259 | if (nbc->md_bdev) | |
1260 | blkdev_put(nbc->md_bdev, | |
1261 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1262 | kfree(nbc); |
1263 | } | |
1264 | lc_destroy(resync_lru); | |
1265 | ||
1266 | reply->ret_code = retcode; | |
0e29d163 | 1267 | conn_reconfig_done(mdev->tconn); |
b411b363 PR |
1268 | return 0; |
1269 | } | |
1270 | ||
82f59cc6 LE |
1271 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1272 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1273 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1274 | * internal references as well. | |
1275 | * Only then we have finally detached. */ | |
b411b363 PR |
1276 | static int drbd_nl_detach(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, |
1277 | struct drbd_nl_cfg_reply *reply) | |
1278 | { | |
9a0d9d03 LE |
1279 | enum drbd_ret_code retcode; |
1280 | int ret; | |
82f59cc6 | 1281 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
9a0d9d03 LE |
1282 | retcode = drbd_request_state(mdev, NS(disk, D_FAILED)); |
1283 | /* D_FAILED will transition to DISKLESS. */ | |
1284 | ret = wait_event_interruptible(mdev->misc_wait, | |
1285 | mdev->state.disk != D_FAILED); | |
82f59cc6 | 1286 | drbd_resume_io(mdev); |
9b2f61ae | 1287 | if ((int)retcode == (int)SS_IS_DISKLESS) |
9a0d9d03 LE |
1288 | retcode = SS_NOTHING_TO_DO; |
1289 | if (ret) | |
1290 | retcode = ERR_INTR; | |
1291 | reply->ret_code = retcode; | |
b411b363 PR |
1292 | return 0; |
1293 | } | |
1294 | ||
80883197 | 1295 | static int drbd_nl_net_conf(struct drbd_tconn *tconn, struct drbd_nl_cfg_req *nlp, |
b411b363 PR |
1296 | struct drbd_nl_cfg_reply *reply) |
1297 | { | |
bb3bfe96 | 1298 | int i; |
116676ca | 1299 | enum drbd_ret_code retcode; |
b411b363 PR |
1300 | struct net_conf *new_conf = NULL; |
1301 | struct crypto_hash *tfm = NULL; | |
1302 | struct crypto_hash *integrity_w_tfm = NULL; | |
1303 | struct crypto_hash *integrity_r_tfm = NULL; | |
80883197 | 1304 | struct drbd_conf *mdev; |
b411b363 PR |
1305 | char hmac_name[CRYPTO_MAX_ALG_NAME]; |
1306 | void *int_dig_out = NULL; | |
1307 | void *int_dig_in = NULL; | |
1308 | void *int_dig_vv = NULL; | |
80883197 | 1309 | struct drbd_tconn *oconn; |
b411b363 PR |
1310 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
1311 | ||
80883197 | 1312 | conn_reconfig_start(tconn); |
b411b363 | 1313 | |
80883197 | 1314 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
1315 | retcode = ERR_NET_CONFIGURED; |
1316 | goto fail; | |
1317 | } | |
1318 | ||
1319 | /* allocation not in the IO path, cqueue thread context */ | |
2db4e42e | 1320 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
b411b363 PR |
1321 | if (!new_conf) { |
1322 | retcode = ERR_NOMEM; | |
1323 | goto fail; | |
1324 | } | |
1325 | ||
b411b363 PR |
1326 | new_conf->timeout = DRBD_TIMEOUT_DEF; |
1327 | new_conf->try_connect_int = DRBD_CONNECT_INT_DEF; | |
1328 | new_conf->ping_int = DRBD_PING_INT_DEF; | |
1329 | new_conf->max_epoch_size = DRBD_MAX_EPOCH_SIZE_DEF; | |
1330 | new_conf->max_buffers = DRBD_MAX_BUFFERS_DEF; | |
1331 | new_conf->unplug_watermark = DRBD_UNPLUG_WATERMARK_DEF; | |
1332 | new_conf->sndbuf_size = DRBD_SNDBUF_SIZE_DEF; | |
1333 | new_conf->rcvbuf_size = DRBD_RCVBUF_SIZE_DEF; | |
1334 | new_conf->ko_count = DRBD_KO_COUNT_DEF; | |
1335 | new_conf->after_sb_0p = DRBD_AFTER_SB_0P_DEF; | |
1336 | new_conf->after_sb_1p = DRBD_AFTER_SB_1P_DEF; | |
1337 | new_conf->after_sb_2p = DRBD_AFTER_SB_2P_DEF; | |
1338 | new_conf->want_lose = 0; | |
1339 | new_conf->two_primaries = 0; | |
1340 | new_conf->wire_protocol = DRBD_PROT_C; | |
1341 | new_conf->ping_timeo = DRBD_PING_TIMEO_DEF; | |
1342 | new_conf->rr_conflict = DRBD_RR_CONFLICT_DEF; | |
422028b1 PR |
1343 | new_conf->on_congestion = DRBD_ON_CONGESTION_DEF; |
1344 | new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF; | |
b411b363 | 1345 | |
3f9cbe93 | 1346 | if (!net_conf_from_tags(nlp->tag_list, new_conf)) { |
b411b363 PR |
1347 | retcode = ERR_MANDATORY_TAG; |
1348 | goto fail; | |
1349 | } | |
1350 | ||
1351 | if (new_conf->two_primaries | |
1352 | && (new_conf->wire_protocol != DRBD_PROT_C)) { | |
1353 | retcode = ERR_NOT_PROTO_C; | |
1354 | goto fail; | |
47ff2d0a PR |
1355 | } |
1356 | ||
80883197 PR |
1357 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1358 | if (get_ldev(mdev)) { | |
1359 | enum drbd_fencing_p fp = mdev->ldev->dc.fencing; | |
1360 | put_ldev(mdev); | |
1361 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) { | |
1362 | retcode = ERR_STONITH_AND_PROT_A; | |
1363 | goto fail; | |
1364 | } | |
1365 | } | |
1366 | if (mdev->state.role == R_PRIMARY && new_conf->want_lose) { | |
1367 | retcode = ERR_DISCARD; | |
47ff2d0a PR |
1368 | goto fail; |
1369 | } | |
80883197 PR |
1370 | if (!mdev->bitmap) { |
1371 | if(drbd_bm_init(mdev)) { | |
1372 | retcode = ERR_NOMEM; | |
1373 | goto fail; | |
1374 | } | |
1375 | } | |
47ff2d0a | 1376 | } |
b411b363 | 1377 | |
422028b1 PR |
1378 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) { |
1379 | retcode = ERR_CONG_NOT_PROTO_A; | |
1380 | goto fail; | |
1381 | } | |
1382 | ||
b411b363 PR |
1383 | retcode = NO_ERROR; |
1384 | ||
1385 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
1386 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
80883197 PR |
1387 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
1388 | if (oconn == tconn) | |
b411b363 | 1389 | continue; |
80883197 PR |
1390 | if (get_net_conf(oconn)) { |
1391 | taken_addr = (struct sockaddr *)&oconn->net_conf->my_addr; | |
1392 | if (new_conf->my_addr_len == oconn->net_conf->my_addr_len && | |
b411b363 PR |
1393 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
1394 | retcode = ERR_LOCAL_ADDR; | |
1395 | ||
80883197 PR |
1396 | taken_addr = (struct sockaddr *)&oconn->net_conf->peer_addr; |
1397 | if (new_conf->peer_addr_len == oconn->net_conf->peer_addr_len && | |
b411b363 PR |
1398 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
1399 | retcode = ERR_PEER_ADDR; | |
1400 | ||
80883197 | 1401 | put_net_conf(oconn); |
b411b363 PR |
1402 | if (retcode != NO_ERROR) |
1403 | goto fail; | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | if (new_conf->cram_hmac_alg[0] != 0) { | |
1408 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1409 | new_conf->cram_hmac_alg); | |
1410 | tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC); | |
1411 | if (IS_ERR(tfm)) { | |
1412 | tfm = NULL; | |
1413 | retcode = ERR_AUTH_ALG; | |
1414 | goto fail; | |
1415 | } | |
1416 | ||
0798219f | 1417 | if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) { |
b411b363 PR |
1418 | retcode = ERR_AUTH_ALG_ND; |
1419 | goto fail; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | if (new_conf->integrity_alg[0]) { | |
1424 | integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1425 | if (IS_ERR(integrity_w_tfm)) { | |
1426 | integrity_w_tfm = NULL; | |
1427 | retcode=ERR_INTEGRITY_ALG; | |
1428 | goto fail; | |
1429 | } | |
1430 | ||
1431 | if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) { | |
1432 | retcode=ERR_INTEGRITY_ALG_ND; | |
1433 | goto fail; | |
1434 | } | |
1435 | ||
1436 | integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1437 | if (IS_ERR(integrity_r_tfm)) { | |
1438 | integrity_r_tfm = NULL; | |
1439 | retcode=ERR_INTEGRITY_ALG; | |
1440 | goto fail; | |
1441 | } | |
1442 | } | |
1443 | ||
b411b363 PR |
1444 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
1445 | ||
80883197 | 1446 | /* allocation not in the IO path, cqueue thread context */ |
b411b363 PR |
1447 | if (integrity_w_tfm) { |
1448 | i = crypto_hash_digestsize(integrity_w_tfm); | |
1449 | int_dig_out = kmalloc(i, GFP_KERNEL); | |
1450 | if (!int_dig_out) { | |
1451 | retcode = ERR_NOMEM; | |
1452 | goto fail; | |
1453 | } | |
1454 | int_dig_in = kmalloc(i, GFP_KERNEL); | |
1455 | if (!int_dig_in) { | |
1456 | retcode = ERR_NOMEM; | |
1457 | goto fail; | |
1458 | } | |
1459 | int_dig_vv = kmalloc(i, GFP_KERNEL); | |
1460 | if (!int_dig_vv) { | |
1461 | retcode = ERR_NOMEM; | |
1462 | goto fail; | |
1463 | } | |
1464 | } | |
1465 | ||
80883197 PR |
1466 | conn_flush_workqueue(tconn); |
1467 | spin_lock_irq(&tconn->req_lock); | |
1468 | if (tconn->net_conf != NULL) { | |
b411b363 | 1469 | retcode = ERR_NET_CONFIGURED; |
80883197 | 1470 | spin_unlock_irq(&tconn->req_lock); |
b411b363 PR |
1471 | goto fail; |
1472 | } | |
80883197 | 1473 | tconn->net_conf = new_conf; |
b411b363 | 1474 | |
80883197 PR |
1475 | crypto_free_hash(tconn->cram_hmac_tfm); |
1476 | tconn->cram_hmac_tfm = tfm; | |
b411b363 | 1477 | |
80883197 PR |
1478 | crypto_free_hash(tconn->integrity_w_tfm); |
1479 | tconn->integrity_w_tfm = integrity_w_tfm; | |
b411b363 | 1480 | |
80883197 PR |
1481 | crypto_free_hash(tconn->integrity_r_tfm); |
1482 | tconn->integrity_r_tfm = integrity_r_tfm; | |
b411b363 | 1483 | |
80883197 PR |
1484 | kfree(tconn->int_dig_out); |
1485 | kfree(tconn->int_dig_in); | |
1486 | kfree(tconn->int_dig_vv); | |
1487 | tconn->int_dig_out=int_dig_out; | |
1488 | tconn->int_dig_in=int_dig_in; | |
1489 | tconn->int_dig_vv=int_dig_vv; | |
1490 | retcode = _conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
1491 | spin_unlock_irq(&tconn->req_lock); | |
b411b363 | 1492 | |
80883197 PR |
1493 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1494 | mdev->send_cnt = 0; | |
1495 | mdev->recv_cnt = 0; | |
1496 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1497 | } | |
b411b363 | 1498 | reply->ret_code = retcode; |
80883197 | 1499 | conn_reconfig_done(tconn); |
b411b363 PR |
1500 | return 0; |
1501 | ||
1502 | fail: | |
1503 | kfree(int_dig_out); | |
1504 | kfree(int_dig_in); | |
1505 | kfree(int_dig_vv); | |
1506 | crypto_free_hash(tfm); | |
1507 | crypto_free_hash(integrity_w_tfm); | |
1508 | crypto_free_hash(integrity_r_tfm); | |
b411b363 PR |
1509 | kfree(new_conf); |
1510 | ||
1511 | reply->ret_code = retcode; | |
80883197 | 1512 | conn_reconfig_done(tconn); |
b411b363 PR |
1513 | return 0; |
1514 | } | |
1515 | ||
80883197 | 1516 | static int drbd_nl_disconnect(struct drbd_tconn *tconn, struct drbd_nl_cfg_req *nlp, |
b411b363 PR |
1517 | struct drbd_nl_cfg_reply *reply) |
1518 | { | |
1519 | int retcode; | |
2561b9c1 PR |
1520 | struct disconnect dc; |
1521 | ||
1522 | memset(&dc, 0, sizeof(struct disconnect)); | |
3f9cbe93 | 1523 | if (!disconnect_from_tags(nlp->tag_list, &dc)) { |
2561b9c1 PR |
1524 | retcode = ERR_MANDATORY_TAG; |
1525 | goto fail; | |
1526 | } | |
1527 | ||
1528 | if (dc.force) { | |
df24aa45 PR |
1529 | spin_lock_irq(&tconn->req_lock); |
1530 | if (tconn->cstate >= C_WF_CONNECTION) | |
1531 | _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
1532 | spin_unlock_irq(&tconn->req_lock); | |
2561b9c1 PR |
1533 | goto done; |
1534 | } | |
b411b363 | 1535 | |
df24aa45 | 1536 | retcode = conn_request_state(tconn, NS(conn, C_DISCONNECTING), 0); |
b411b363 PR |
1537 | |
1538 | if (retcode == SS_NOTHING_TO_DO) | |
1539 | goto done; | |
1540 | else if (retcode == SS_ALREADY_STANDALONE) | |
1541 | goto done; | |
1542 | else if (retcode == SS_PRIMARY_NOP) { | |
df24aa45 PR |
1543 | /* Our state checking code wants to see the peer outdated. */ |
1544 | retcode = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
1545 | pdsk, D_OUTDATED), CS_VERBOSE); | |
b411b363 PR |
1546 | } else if (retcode == SS_CW_FAILED_BY_PEER) { |
1547 | /* The peer probably wants to see us outdated. */ | |
df24aa45 PR |
1548 | retcode = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, |
1549 | disk, D_OUTDATED), 0); | |
b411b363 | 1550 | if (retcode == SS_IS_DISKLESS || retcode == SS_LOWER_THAN_OUTDATED) { |
df24aa45 | 1551 | conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); |
b411b363 PR |
1552 | retcode = SS_SUCCESS; |
1553 | } | |
1554 | } | |
1555 | ||
1556 | if (retcode < SS_SUCCESS) | |
1557 | goto fail; | |
1558 | ||
df24aa45 PR |
1559 | if (wait_event_interruptible(tconn->ping_wait, |
1560 | tconn->cstate != C_DISCONNECTING)) { | |
b411b363 PR |
1561 | /* Do not test for mdev->state.conn == C_STANDALONE, since |
1562 | someone else might connect us in the mean time! */ | |
1563 | retcode = ERR_INTR; | |
1564 | goto fail; | |
1565 | } | |
1566 | ||
1567 | done: | |
1568 | retcode = NO_ERROR; | |
1569 | fail: | |
b411b363 PR |
1570 | reply->ret_code = retcode; |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | void resync_after_online_grow(struct drbd_conf *mdev) | |
1575 | { | |
1576 | int iass; /* I am sync source */ | |
1577 | ||
1578 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
1579 | if (mdev->state.role != mdev->state.peer) | |
1580 | iass = (mdev->state.role == R_PRIMARY); | |
1581 | else | |
25703f83 | 1582 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
1583 | |
1584 | if (iass) | |
1585 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
1586 | else | |
1587 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
1588 | } | |
1589 | ||
1590 | static int drbd_nl_resize(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1591 | struct drbd_nl_cfg_reply *reply) | |
1592 | { | |
1593 | struct resize rs; | |
1594 | int retcode = NO_ERROR; | |
b411b363 | 1595 | enum determine_dev_size dd; |
6495d2c6 | 1596 | enum dds_flags ddsf; |
b411b363 PR |
1597 | |
1598 | memset(&rs, 0, sizeof(struct resize)); | |
3f9cbe93 | 1599 | if (!resize_from_tags(nlp->tag_list, &rs)) { |
b411b363 PR |
1600 | retcode = ERR_MANDATORY_TAG; |
1601 | goto fail; | |
1602 | } | |
1603 | ||
1604 | if (mdev->state.conn > C_CONNECTED) { | |
1605 | retcode = ERR_RESIZE_RESYNC; | |
1606 | goto fail; | |
1607 | } | |
1608 | ||
1609 | if (mdev->state.role == R_SECONDARY && | |
1610 | mdev->state.peer == R_SECONDARY) { | |
1611 | retcode = ERR_NO_PRIMARY; | |
1612 | goto fail; | |
1613 | } | |
1614 | ||
1615 | if (!get_ldev(mdev)) { | |
1616 | retcode = ERR_NO_DISK; | |
1617 | goto fail; | |
1618 | } | |
1619 | ||
31890f4a | 1620 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
1621 | retcode = ERR_NEED_APV_93; |
1622 | goto fail; | |
1623 | } | |
1624 | ||
087c2492 | 1625 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 1626 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 PR |
1627 | |
1628 | mdev->ldev->dc.disk_size = (sector_t)rs.resize_size; | |
6495d2c6 | 1629 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 1630 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
1631 | drbd_md_sync(mdev); |
1632 | put_ldev(mdev); | |
1633 | if (dd == dev_size_error) { | |
1634 | retcode = ERR_NOMEM_BITMAP; | |
1635 | goto fail; | |
1636 | } | |
1637 | ||
087c2492 | 1638 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
1639 | if (dd == grew) |
1640 | set_bit(RESIZE_PENDING, &mdev->flags); | |
1641 | ||
1642 | drbd_send_uuids(mdev); | |
6495d2c6 | 1643 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
1644 | } |
1645 | ||
1646 | fail: | |
1647 | reply->ret_code = retcode; | |
1648 | return 0; | |
1649 | } | |
1650 | ||
1651 | static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1652 | struct drbd_nl_cfg_reply *reply) | |
1653 | { | |
1654 | int retcode = NO_ERROR; | |
1655 | int err; | |
1656 | int ovr; /* online verify running */ | |
1657 | int rsr; /* re-sync running */ | |
1658 | struct crypto_hash *verify_tfm = NULL; | |
1659 | struct crypto_hash *csums_tfm = NULL; | |
1660 | struct syncer_conf sc; | |
1661 | cpumask_var_t new_cpu_mask; | |
778f271d PR |
1662 | int *rs_plan_s = NULL; |
1663 | int fifo_size; | |
b411b363 PR |
1664 | |
1665 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { | |
1666 | retcode = ERR_NOMEM; | |
1667 | goto fail; | |
1668 | } | |
1669 | ||
1670 | if (nlp->flags & DRBD_NL_SET_DEFAULTS) { | |
1671 | memset(&sc, 0, sizeof(struct syncer_conf)); | |
1672 | sc.rate = DRBD_RATE_DEF; | |
1673 | sc.after = DRBD_AFTER_DEF; | |
1674 | sc.al_extents = DRBD_AL_EXTENTS_DEF; | |
265be2d0 | 1675 | sc.on_no_data = DRBD_ON_NO_DATA_DEF; |
9a31d716 PR |
1676 | sc.c_plan_ahead = DRBD_C_PLAN_AHEAD_DEF; |
1677 | sc.c_delay_target = DRBD_C_DELAY_TARGET_DEF; | |
1678 | sc.c_fill_target = DRBD_C_FILL_TARGET_DEF; | |
0f0601f4 LE |
1679 | sc.c_max_rate = DRBD_C_MAX_RATE_DEF; |
1680 | sc.c_min_rate = DRBD_C_MIN_RATE_DEF; | |
b411b363 PR |
1681 | } else |
1682 | memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf)); | |
1683 | ||
3f9cbe93 | 1684 | if (!syncer_conf_from_tags(nlp->tag_list, &sc)) { |
b411b363 PR |
1685 | retcode = ERR_MANDATORY_TAG; |
1686 | goto fail; | |
1687 | } | |
1688 | ||
1689 | /* re-sync running */ | |
1690 | rsr = ( mdev->state.conn == C_SYNC_SOURCE || | |
1691 | mdev->state.conn == C_SYNC_TARGET || | |
1692 | mdev->state.conn == C_PAUSED_SYNC_S || | |
1693 | mdev->state.conn == C_PAUSED_SYNC_T ); | |
1694 | ||
1695 | if (rsr && strcmp(sc.csums_alg, mdev->sync_conf.csums_alg)) { | |
1696 | retcode = ERR_CSUMS_RESYNC_RUNNING; | |
1697 | goto fail; | |
1698 | } | |
1699 | ||
1700 | if (!rsr && sc.csums_alg[0]) { | |
1701 | csums_tfm = crypto_alloc_hash(sc.csums_alg, 0, CRYPTO_ALG_ASYNC); | |
1702 | if (IS_ERR(csums_tfm)) { | |
1703 | csums_tfm = NULL; | |
1704 | retcode = ERR_CSUMS_ALG; | |
1705 | goto fail; | |
1706 | } | |
1707 | ||
1708 | if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) { | |
1709 | retcode = ERR_CSUMS_ALG_ND; | |
1710 | goto fail; | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | /* online verify running */ | |
1715 | ovr = (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T); | |
1716 | ||
1717 | if (ovr) { | |
1718 | if (strcmp(sc.verify_alg, mdev->sync_conf.verify_alg)) { | |
1719 | retcode = ERR_VERIFY_RUNNING; | |
1720 | goto fail; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | if (!ovr && sc.verify_alg[0]) { | |
1725 | verify_tfm = crypto_alloc_hash(sc.verify_alg, 0, CRYPTO_ALG_ASYNC); | |
1726 | if (IS_ERR(verify_tfm)) { | |
1727 | verify_tfm = NULL; | |
1728 | retcode = ERR_VERIFY_ALG; | |
1729 | goto fail; | |
1730 | } | |
1731 | ||
1732 | if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) { | |
1733 | retcode = ERR_VERIFY_ALG_ND; | |
1734 | goto fail; | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | /* silently ignore cpu mask on UP kernel */ | |
1739 | if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) { | |
1740 | err = __bitmap_parse(sc.cpu_mask, 32, 0, | |
1741 | cpumask_bits(new_cpu_mask), nr_cpu_ids); | |
1742 | if (err) { | |
1743 | dev_warn(DEV, "__bitmap_parse() failed with %d\n", err); | |
1744 | retcode = ERR_CPU_MASK_PARSE; | |
1745 | goto fail; | |
1746 | } | |
1747 | } | |
1748 | ||
841ce241 AG |
1749 | if (!expect(sc.rate >= 1)) |
1750 | sc.rate = 1; | |
7ad651b5 LE |
1751 | |
1752 | /* clip to allowed range */ | |
1753 | if (!expect(sc.al_extents >= DRBD_AL_EXTENTS_MIN)) | |
1754 | sc.al_extents = DRBD_AL_EXTENTS_MIN; | |
1755 | if (!expect(sc.al_extents <= DRBD_AL_EXTENTS_MAX)) | |
1756 | sc.al_extents = DRBD_AL_EXTENTS_MAX; | |
b411b363 PR |
1757 | |
1758 | /* most sanity checks done, try to assign the new sync-after | |
1759 | * dependency. need to hold the global lock in there, | |
1760 | * to avoid a race in the dependency loop check. */ | |
1761 | retcode = drbd_alter_sa(mdev, sc.after); | |
1762 | if (retcode != NO_ERROR) | |
1763 | goto fail; | |
1764 | ||
778f271d PR |
1765 | fifo_size = (sc.c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
1766 | if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) { | |
1767 | rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL); | |
1768 | if (!rs_plan_s) { | |
1769 | dev_err(DEV, "kmalloc of fifo_buffer failed"); | |
1770 | retcode = ERR_NOMEM; | |
1771 | goto fail; | |
1772 | } | |
1773 | } | |
1774 | ||
b411b363 PR |
1775 | /* ok, assign the rest of it as well. |
1776 | * lock against receive_SyncParam() */ | |
1777 | spin_lock(&mdev->peer_seq_lock); | |
1778 | mdev->sync_conf = sc; | |
1779 | ||
1780 | if (!rsr) { | |
1781 | crypto_free_hash(mdev->csums_tfm); | |
1782 | mdev->csums_tfm = csums_tfm; | |
1783 | csums_tfm = NULL; | |
1784 | } | |
1785 | ||
1786 | if (!ovr) { | |
1787 | crypto_free_hash(mdev->verify_tfm); | |
1788 | mdev->verify_tfm = verify_tfm; | |
1789 | verify_tfm = NULL; | |
1790 | } | |
778f271d PR |
1791 | |
1792 | if (fifo_size != mdev->rs_plan_s.size) { | |
1793 | kfree(mdev->rs_plan_s.values); | |
1794 | mdev->rs_plan_s.values = rs_plan_s; | |
1795 | mdev->rs_plan_s.size = fifo_size; | |
1796 | mdev->rs_planed = 0; | |
1797 | rs_plan_s = NULL; | |
1798 | } | |
1799 | ||
b411b363 PR |
1800 | spin_unlock(&mdev->peer_seq_lock); |
1801 | ||
1802 | if (get_ldev(mdev)) { | |
1803 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
1804 | drbd_al_shrink(mdev); | |
1805 | err = drbd_check_al_size(mdev); | |
1806 | lc_unlock(mdev->act_log); | |
1807 | wake_up(&mdev->al_wait); | |
1808 | ||
1809 | put_ldev(mdev); | |
1810 | drbd_md_sync(mdev); | |
1811 | ||
1812 | if (err) { | |
1813 | retcode = ERR_NOMEM; | |
1814 | goto fail; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | if (mdev->state.conn >= C_CONNECTED) | |
1819 | drbd_send_sync_param(mdev, &sc); | |
1820 | ||
80822284 PR |
1821 | if (!cpumask_equal(mdev->tconn->cpu_mask, new_cpu_mask)) { |
1822 | cpumask_copy(mdev->tconn->cpu_mask, new_cpu_mask); | |
1823 | drbd_calc_cpu_mask(mdev->tconn); | |
e6b3ea83 PR |
1824 | mdev->tconn->receiver.reset_cpu_mask = 1; |
1825 | mdev->tconn->asender.reset_cpu_mask = 1; | |
1826 | mdev->tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
1827 | } |
1828 | ||
1829 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1830 | fail: | |
778f271d | 1831 | kfree(rs_plan_s); |
b411b363 PR |
1832 | free_cpumask_var(new_cpu_mask); |
1833 | crypto_free_hash(csums_tfm); | |
1834 | crypto_free_hash(verify_tfm); | |
1835 | reply->ret_code = retcode; | |
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1840 | struct drbd_nl_cfg_reply *reply) | |
1841 | { | |
1842 | int retcode; | |
1843 | ||
194bfb32 LE |
1844 | /* If there is still bitmap IO pending, probably because of a previous |
1845 | * resync just being finished, wait for it before requesting a new resync. */ | |
1846 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
1847 | ||
b411b363 PR |
1848 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
1849 | ||
1850 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
1851 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
1852 | ||
1853 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 1854 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1855 | if (mdev->state.conn < C_CONNECTED) |
1856 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 1857 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1858 | |
1859 | if (retcode != SS_NEED_CONNECTION) | |
1860 | break; | |
1861 | ||
1862 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
1863 | } | |
1864 | ||
1865 | reply->ret_code = retcode; | |
1866 | return 0; | |
1867 | } | |
1868 | ||
0778286a PR |
1869 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
1870 | { | |
1871 | int rv; | |
1872 | ||
1873 | rv = drbd_bmio_set_n_write(mdev); | |
1874 | drbd_suspend_al(mdev); | |
1875 | return rv; | |
1876 | } | |
1877 | ||
b411b363 PR |
1878 | static int drbd_nl_invalidate_peer(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, |
1879 | struct drbd_nl_cfg_reply *reply) | |
1880 | { | |
0778286a | 1881 | int retcode; |
b411b363 | 1882 | |
194bfb32 LE |
1883 | /* If there is still bitmap IO pending, probably because of a previous |
1884 | * resync just being finished, wait for it before requesting a new resync. */ | |
1885 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
1886 | ||
0778286a PR |
1887 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED); |
1888 | ||
1889 | if (retcode < SS_SUCCESS) { | |
1890 | if (retcode == SS_NEED_CONNECTION && mdev->state.role == R_PRIMARY) { | |
1891 | /* The peer will get a resync upon connect anyways. Just make that | |
1892 | into a full resync. */ | |
1893 | retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT)); | |
1894 | if (retcode >= SS_SUCCESS) { | |
0778286a | 1895 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al, |
20ceb2b2 LE |
1896 | "set_n_write from invalidate_peer", |
1897 | BM_LOCKED_SET_ALLOWED)) | |
0778286a PR |
1898 | retcode = ERR_IO_MD_DISK; |
1899 | } | |
1900 | } else | |
1901 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S)); | |
1902 | } | |
b411b363 | 1903 | |
0778286a | 1904 | reply->ret_code = retcode; |
b411b363 PR |
1905 | return 0; |
1906 | } | |
1907 | ||
1908 | static int drbd_nl_pause_sync(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1909 | struct drbd_nl_cfg_reply *reply) | |
1910 | { | |
1911 | int retcode = NO_ERROR; | |
1912 | ||
1913 | if (drbd_request_state(mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) | |
1914 | retcode = ERR_PAUSE_IS_SET; | |
1915 | ||
1916 | reply->ret_code = retcode; | |
1917 | return 0; | |
1918 | } | |
1919 | ||
1920 | static int drbd_nl_resume_sync(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1921 | struct drbd_nl_cfg_reply *reply) | |
1922 | { | |
1923 | int retcode = NO_ERROR; | |
cd88d030 | 1924 | union drbd_state s; |
b411b363 | 1925 | |
cd88d030 PR |
1926 | if (drbd_request_state(mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
1927 | s = mdev->state; | |
1928 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { | |
1929 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
1930 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
1931 | } else { | |
1932 | retcode = ERR_PAUSE_IS_CLEAR; | |
1933 | } | |
1934 | } | |
b411b363 PR |
1935 | |
1936 | reply->ret_code = retcode; | |
1937 | return 0; | |
1938 | } | |
1939 | ||
1940 | static int drbd_nl_suspend_io(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1941 | struct drbd_nl_cfg_reply *reply) | |
1942 | { | |
1943 | reply->ret_code = drbd_request_state(mdev, NS(susp, 1)); | |
1944 | ||
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static int drbd_nl_resume_io(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1949 | struct drbd_nl_cfg_reply *reply) | |
1950 | { | |
43a5182c PR |
1951 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
1952 | drbd_uuid_new_current(mdev); | |
1953 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 1954 | } |
265be2d0 | 1955 | drbd_suspend_io(mdev); |
fb22c402 | 1956 | reply->ret_code = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
265be2d0 PR |
1957 | if (reply->ret_code == SS_SUCCESS) { |
1958 | if (mdev->state.conn < C_CONNECTED) | |
2f5cdd0b | 1959 | tl_clear(mdev->tconn); |
265be2d0 | 1960 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 1961 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
1962 | } |
1963 | drbd_resume_io(mdev); | |
1964 | ||
b411b363 PR |
1965 | return 0; |
1966 | } | |
1967 | ||
1968 | static int drbd_nl_outdate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1969 | struct drbd_nl_cfg_reply *reply) | |
1970 | { | |
1971 | reply->ret_code = drbd_request_state(mdev, NS(disk, D_OUTDATED)); | |
1972 | return 0; | |
1973 | } | |
1974 | ||
1975 | static int drbd_nl_get_config(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1976 | struct drbd_nl_cfg_reply *reply) | |
1977 | { | |
1978 | unsigned short *tl; | |
1979 | ||
1980 | tl = reply->tag_list; | |
1981 | ||
1982 | if (get_ldev(mdev)) { | |
3f9cbe93 | 1983 | tl = disk_conf_to_tags(&mdev->ldev->dc, tl); |
b411b363 PR |
1984 | put_ldev(mdev); |
1985 | } | |
1986 | ||
b2fb6dbe | 1987 | if (get_net_conf(mdev->tconn)) { |
3f9cbe93 | 1988 | tl = net_conf_to_tags(mdev->tconn->net_conf, tl); |
b2fb6dbe | 1989 | put_net_conf(mdev->tconn); |
b411b363 | 1990 | } |
3f9cbe93 | 1991 | tl = syncer_conf_to_tags(&mdev->sync_conf, tl); |
b411b363 PR |
1992 | |
1993 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
1994 | ||
1995 | return (int)((char *)tl - (char *)reply->tag_list); | |
1996 | } | |
1997 | ||
1998 | static int drbd_nl_get_state(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
1999 | struct drbd_nl_cfg_reply *reply) | |
2000 | { | |
2001 | unsigned short *tl = reply->tag_list; | |
2002 | union drbd_state s = mdev->state; | |
2003 | unsigned long rs_left; | |
2004 | unsigned int res; | |
2005 | ||
3f9cbe93 | 2006 | tl = get_state_to_tags((struct get_state *)&s, tl); |
b411b363 PR |
2007 | |
2008 | /* no local ref, no bitmap, no syncer progress. */ | |
2009 | if (s.conn >= C_SYNC_SOURCE && s.conn <= C_PAUSED_SYNC_T) { | |
2010 | if (get_ldev(mdev)) { | |
2011 | drbd_get_syncer_progress(mdev, &rs_left, &res); | |
2012 | tl = tl_add_int(tl, T_sync_progress, &res); | |
2013 | put_ldev(mdev); | |
2014 | } | |
2015 | } | |
2016 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2017 | ||
2018 | return (int)((char *)tl - (char *)reply->tag_list); | |
2019 | } | |
2020 | ||
2021 | static int drbd_nl_get_uuids(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
2022 | struct drbd_nl_cfg_reply *reply) | |
2023 | { | |
2024 | unsigned short *tl; | |
2025 | ||
2026 | tl = reply->tag_list; | |
2027 | ||
2028 | if (get_ldev(mdev)) { | |
2029 | tl = tl_add_blob(tl, T_uuids, mdev->ldev->md.uuid, UI_SIZE*sizeof(u64)); | |
2030 | tl = tl_add_int(tl, T_uuids_flags, &mdev->ldev->md.flags); | |
2031 | put_ldev(mdev); | |
2032 | } | |
2033 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2034 | ||
2035 | return (int)((char *)tl - (char *)reply->tag_list); | |
2036 | } | |
2037 | ||
2038 | /** | |
2039 | * drbd_nl_get_timeout_flag() - Used by drbdsetup to find out which timeout value to use | |
2040 | * @mdev: DRBD device. | |
2041 | * @nlp: Netlink/connector packet from drbdsetup | |
2042 | * @reply: Reply packet for drbdsetup | |
2043 | */ | |
2044 | static int drbd_nl_get_timeout_flag(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
2045 | struct drbd_nl_cfg_reply *reply) | |
2046 | { | |
2047 | unsigned short *tl; | |
2048 | char rv; | |
2049 | ||
2050 | tl = reply->tag_list; | |
2051 | ||
2052 | rv = mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2053 | test_bit(USE_DEGR_WFC_T, &mdev->flags) ? UT_DEGRADED : UT_DEFAULT; | |
2054 | ||
2055 | tl = tl_add_blob(tl, T_use_degraded, &rv, sizeof(rv)); | |
2056 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2057 | ||
2058 | return (int)((char *)tl - (char *)reply->tag_list); | |
2059 | } | |
2060 | ||
2061 | static int drbd_nl_start_ov(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
2062 | struct drbd_nl_cfg_reply *reply) | |
2063 | { | |
2064 | /* default to resume from last known position, if possible */ | |
2065 | struct start_ov args = | |
2066 | { .start_sector = mdev->ov_start_sector }; | |
2067 | ||
3f9cbe93 | 2068 | if (!start_ov_from_tags(nlp->tag_list, &args)) { |
b411b363 PR |
2069 | reply->ret_code = ERR_MANDATORY_TAG; |
2070 | return 0; | |
2071 | } | |
873b0d5f LE |
2072 | |
2073 | /* If there is still bitmap IO pending, e.g. previous resync or verify | |
2074 | * just being finished, wait for it before requesting a new resync. */ | |
2075 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2076 | ||
b411b363 PR |
2077 | /* w_make_ov_request expects position to be aligned */ |
2078 | mdev->ov_start_sector = args.start_sector & ~BM_SECT_PER_BIT; | |
2079 | reply->ret_code = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); | |
2080 | return 0; | |
2081 | } | |
2082 | ||
2083 | ||
2084 | static int drbd_nl_new_c_uuid(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
2085 | struct drbd_nl_cfg_reply *reply) | |
2086 | { | |
2087 | int retcode = NO_ERROR; | |
2088 | int skip_initial_sync = 0; | |
2089 | int err; | |
2090 | ||
2091 | struct new_c_uuid args; | |
2092 | ||
2093 | memset(&args, 0, sizeof(struct new_c_uuid)); | |
3f9cbe93 | 2094 | if (!new_c_uuid_from_tags(nlp->tag_list, &args)) { |
b411b363 PR |
2095 | reply->ret_code = ERR_MANDATORY_TAG; |
2096 | return 0; | |
2097 | } | |
2098 | ||
8410da8f | 2099 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2100 | |
2101 | if (!get_ldev(mdev)) { | |
2102 | retcode = ERR_NO_DISK; | |
2103 | goto out; | |
2104 | } | |
2105 | ||
2106 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2107 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2108 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2109 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2110 | skip_initial_sync = 1; | |
2111 | } else if (mdev->state.conn != C_STANDALONE) { | |
2112 | retcode = ERR_CONNECTED; | |
2113 | goto out_dec; | |
2114 | } | |
2115 | ||
2116 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2117 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2118 | ||
2119 | if (args.clear_bm) { | |
20ceb2b2 LE |
2120 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2121 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2122 | if (err) { |
2123 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2124 | retcode = ERR_IO_MD_DISK; | |
2125 | } | |
2126 | if (skip_initial_sync) { | |
2127 | drbd_send_uuids_skip_initial_sync(mdev); | |
2128 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2129 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2130 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2131 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2132 | CS_VERBOSE, NULL); | |
87eeee41 | 2133 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2134 | } |
2135 | } | |
2136 | ||
2137 | drbd_md_sync(mdev); | |
2138 | out_dec: | |
2139 | put_ldev(mdev); | |
2140 | out: | |
8410da8f | 2141 | mutex_unlock(mdev->state_mutex); |
b411b363 PR |
2142 | |
2143 | reply->ret_code = retcode; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
774b3055 PR |
2147 | static int drbd_nl_new_conn(struct drbd_nl_cfg_req *nlp, struct drbd_nl_cfg_reply *reply) |
2148 | { | |
2149 | struct new_connection args; | |
2150 | ||
2151 | if (!new_connection_from_tags(nlp->tag_list, &args)) { | |
2152 | reply->ret_code = ERR_MANDATORY_TAG; | |
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | reply->ret_code = NO_ERROR; | |
2157 | if (!drbd_new_tconn(args.name)) | |
2158 | reply->ret_code = ERR_NOMEM; | |
2159 | ||
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | static int drbd_nl_new_minor(struct drbd_tconn *tconn, | |
2164 | struct drbd_nl_cfg_req *nlp, struct drbd_nl_cfg_reply *reply) | |
2165 | { | |
2166 | struct new_minor args; | |
2167 | ||
2168 | args.vol_nr = 0; | |
2169 | args.minor = 0; | |
2170 | ||
2171 | if (!new_minor_from_tags(nlp->tag_list, &args)) { | |
2172 | reply->ret_code = ERR_MANDATORY_TAG; | |
2173 | return 0; | |
2174 | } | |
2175 | ||
2176 | reply->ret_code = conn_new_minor(tconn, args.minor, args.vol_nr); | |
2177 | ||
2178 | return 0; | |
2179 | } | |
2180 | ||
2181 | static int drbd_nl_del_minor(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, | |
2182 | struct drbd_nl_cfg_reply *reply) | |
2183 | { | |
2184 | if (mdev->state.disk == D_DISKLESS && | |
2185 | mdev->state.conn == C_STANDALONE && | |
2186 | mdev->state.role == R_SECONDARY) { | |
2187 | drbd_delete_device(mdev_to_minor(mdev)); | |
2188 | reply->ret_code = NO_ERROR; | |
2189 | } else { | |
2190 | reply->ret_code = ERR_MINOR_CONFIGURED; | |
2191 | } | |
2192 | return 0; | |
2193 | } | |
2194 | ||
2195 | static int drbd_nl_del_conn(struct drbd_tconn *tconn, | |
2196 | struct drbd_nl_cfg_req *nlp, struct drbd_nl_cfg_reply *reply) | |
2197 | { | |
2198 | if (conn_lowest_minor(tconn) < 0) { | |
2199 | drbd_free_tconn(tconn); | |
2200 | reply->ret_code = NO_ERROR; | |
2201 | } else { | |
2202 | reply->ret_code = ERR_CONN_IN_USE; | |
2203 | } | |
2204 | ||
2205 | return 0; | |
2206 | } | |
2207 | ||
1aba4d7f PR |
2208 | enum cn_handler_type { |
2209 | CHT_MINOR, | |
2210 | CHT_CONN, | |
2211 | CHT_CTOR, | |
2212 | /* CHT_RES, later */ | |
2213 | }; | |
b411b363 | 2214 | struct cn_handler_struct { |
1aba4d7f PR |
2215 | enum cn_handler_type type; |
2216 | union { | |
2217 | int (*minor_based)(struct drbd_conf *, | |
2218 | struct drbd_nl_cfg_req *, | |
2219 | struct drbd_nl_cfg_reply *); | |
2220 | int (*conn_based)(struct drbd_tconn *, | |
2221 | struct drbd_nl_cfg_req *, | |
2222 | struct drbd_nl_cfg_reply *); | |
2223 | int (*constructor)(struct drbd_nl_cfg_req *, | |
2224 | struct drbd_nl_cfg_reply *); | |
2225 | }; | |
b411b363 PR |
2226 | int reply_body_size; |
2227 | }; | |
2228 | ||
2229 | static struct cn_handler_struct cnd_table[] = { | |
1aba4d7f PR |
2230 | [ P_primary ] = { CHT_MINOR, { &drbd_nl_primary }, 0 }, |
2231 | [ P_secondary ] = { CHT_MINOR, { &drbd_nl_secondary }, 0 }, | |
2232 | [ P_disk_conf ] = { CHT_MINOR, { &drbd_nl_disk_conf }, 0 }, | |
2233 | [ P_detach ] = { CHT_MINOR, { &drbd_nl_detach }, 0 }, | |
80883197 PR |
2234 | [ P_net_conf ] = { CHT_CONN, { .conn_based = &drbd_nl_net_conf }, 0 }, |
2235 | [ P_disconnect ] = { CHT_CONN, { .conn_based = &drbd_nl_disconnect }, 0 }, | |
1aba4d7f PR |
2236 | [ P_resize ] = { CHT_MINOR, { &drbd_nl_resize }, 0 }, |
2237 | [ P_syncer_conf ] = { CHT_MINOR, { &drbd_nl_syncer_conf },0 }, | |
2238 | [ P_invalidate ] = { CHT_MINOR, { &drbd_nl_invalidate }, 0 }, | |
2239 | [ P_invalidate_peer ] = { CHT_MINOR, { &drbd_nl_invalidate_peer },0 }, | |
2240 | [ P_pause_sync ] = { CHT_MINOR, { &drbd_nl_pause_sync }, 0 }, | |
2241 | [ P_resume_sync ] = { CHT_MINOR, { &drbd_nl_resume_sync },0 }, | |
2242 | [ P_suspend_io ] = { CHT_MINOR, { &drbd_nl_suspend_io }, 0 }, | |
2243 | [ P_resume_io ] = { CHT_MINOR, { &drbd_nl_resume_io }, 0 }, | |
2244 | [ P_outdate ] = { CHT_MINOR, { &drbd_nl_outdate }, 0 }, | |
2245 | [ P_get_config ] = { CHT_MINOR, { &drbd_nl_get_config }, | |
b411b363 PR |
2246 | sizeof(struct syncer_conf_tag_len_struct) + |
2247 | sizeof(struct disk_conf_tag_len_struct) + | |
2248 | sizeof(struct net_conf_tag_len_struct) }, | |
1aba4d7f | 2249 | [ P_get_state ] = { CHT_MINOR, { &drbd_nl_get_state }, |
b411b363 PR |
2250 | sizeof(struct get_state_tag_len_struct) + |
2251 | sizeof(struct sync_progress_tag_len_struct) }, | |
1aba4d7f | 2252 | [ P_get_uuids ] = { CHT_MINOR, { &drbd_nl_get_uuids }, |
b411b363 | 2253 | sizeof(struct get_uuids_tag_len_struct) }, |
1aba4d7f | 2254 | [ P_get_timeout_flag ] = { CHT_MINOR, { &drbd_nl_get_timeout_flag }, |
b411b363 | 2255 | sizeof(struct get_timeout_flag_tag_len_struct)}, |
1aba4d7f PR |
2256 | [ P_start_ov ] = { CHT_MINOR, { &drbd_nl_start_ov }, 0 }, |
2257 | [ P_new_c_uuid ] = { CHT_MINOR, { &drbd_nl_new_c_uuid }, 0 }, | |
774b3055 PR |
2258 | [ P_new_connection ] = { CHT_CTOR, { .constructor = &drbd_nl_new_conn }, 0 }, |
2259 | [ P_new_minor ] = { CHT_CONN, { .conn_based = &drbd_nl_new_minor }, 0 }, | |
2260 | [ P_del_minor ] = { CHT_MINOR, { &drbd_nl_del_minor }, 0 }, | |
2261 | [ P_del_connection ] = { CHT_CONN, { .conn_based = &drbd_nl_del_conn }, 0 }, | |
b411b363 PR |
2262 | }; |
2263 | ||
9f5180e5 | 2264 | static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms *nsp) |
b411b363 PR |
2265 | { |
2266 | struct drbd_nl_cfg_req *nlp = (struct drbd_nl_cfg_req *)req->data; | |
2267 | struct cn_handler_struct *cm; | |
2268 | struct cn_msg *cn_reply; | |
2269 | struct drbd_nl_cfg_reply *reply; | |
2270 | struct drbd_conf *mdev; | |
1aba4d7f | 2271 | struct drbd_tconn *tconn; |
b411b363 PR |
2272 | int retcode, rr; |
2273 | int reply_size = sizeof(struct cn_msg) | |
2274 | + sizeof(struct drbd_nl_cfg_reply) | |
2275 | + sizeof(short int); | |
2276 | ||
2277 | if (!try_module_get(THIS_MODULE)) { | |
2278 | printk(KERN_ERR "drbd: try_module_get() failed!\n"); | |
2279 | return; | |
2280 | } | |
2281 | ||
01a16b21 | 2282 | if (!cap_raised(current_cap(), CAP_SYS_ADMIN)) { |
9f5180e5 PR |
2283 | retcode = ERR_PERM; |
2284 | goto fail; | |
2285 | } | |
2286 | ||
42ff269d LE |
2287 | if (nlp->packet_type >= P_nl_after_last_packet || |
2288 | nlp->packet_type == P_return_code_only) { | |
b411b363 PR |
2289 | retcode = ERR_PACKET_NR; |
2290 | goto fail; | |
2291 | } | |
2292 | ||
2293 | cm = cnd_table + nlp->packet_type; | |
2294 | ||
2295 | /* This may happen if packet number is 0: */ | |
1aba4d7f | 2296 | if (cm->minor_based == NULL) { |
b411b363 PR |
2297 | retcode = ERR_PACKET_NR; |
2298 | goto fail; | |
2299 | } | |
2300 | ||
2301 | reply_size += cm->reply_body_size; | |
2302 | ||
2303 | /* allocation not in the IO path, cqueue thread context */ | |
3e3a7766 | 2304 | cn_reply = kzalloc(reply_size, GFP_KERNEL); |
b411b363 PR |
2305 | if (!cn_reply) { |
2306 | retcode = ERR_NOMEM; | |
2307 | goto fail; | |
2308 | } | |
2309 | reply = (struct drbd_nl_cfg_reply *) cn_reply->data; | |
2310 | ||
2311 | reply->packet_type = | |
42ff269d | 2312 | cm->reply_body_size ? nlp->packet_type : P_return_code_only; |
b411b363 PR |
2313 | reply->minor = nlp->drbd_minor; |
2314 | reply->ret_code = NO_ERROR; /* Might by modified by cm->function. */ | |
2315 | /* reply->tag_list; might be modified by cm->function. */ | |
2316 | ||
1aba4d7f PR |
2317 | retcode = ERR_MINOR_INVALID; |
2318 | rr = 0; | |
2319 | switch (cm->type) { | |
2320 | case CHT_MINOR: | |
2321 | mdev = minor_to_mdev(nlp->drbd_minor); | |
2322 | if (!mdev) | |
2323 | goto fail; | |
2324 | rr = cm->minor_based(mdev, nlp, reply); | |
2325 | break; | |
2326 | case CHT_CONN: | |
2327 | tconn = conn_by_name(nlp->obj_name); | |
2328 | if (!tconn) { | |
2329 | retcode = ERR_CONN_NOT_KNOWN; | |
2330 | goto fail; | |
2331 | } | |
2332 | rr = cm->conn_based(tconn, nlp, reply); | |
2333 | break; | |
2334 | case CHT_CTOR: | |
2335 | rr = cm->constructor(nlp, reply); | |
2336 | break; | |
2337 | /* case CHT_RES: */ | |
2338 | } | |
b411b363 PR |
2339 | |
2340 | cn_reply->id = req->id; | |
2341 | cn_reply->seq = req->seq; | |
2342 | cn_reply->ack = req->ack + 1; | |
2343 | cn_reply->len = sizeof(struct drbd_nl_cfg_reply) + rr; | |
2344 | cn_reply->flags = 0; | |
2345 | ||
b411b363 PR |
2346 | rr = cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_KERNEL); |
2347 | if (rr && rr != -ESRCH) | |
2348 | printk(KERN_INFO "drbd: cn_netlink_send()=%d\n", rr); | |
2349 | ||
2350 | kfree(cn_reply); | |
2351 | module_put(THIS_MODULE); | |
2352 | return; | |
2353 | fail: | |
2354 | drbd_nl_send_reply(req, retcode); | |
2355 | module_put(THIS_MODULE); | |
2356 | } | |
2357 | ||
2358 | static atomic_t drbd_nl_seq = ATOMIC_INIT(2); /* two. */ | |
2359 | ||
2360 | static unsigned short * | |
2361 | __tl_add_blob(unsigned short *tl, enum drbd_tags tag, const void *data, | |
2362 | unsigned short len, int nul_terminated) | |
2363 | { | |
2364 | unsigned short l = tag_descriptions[tag_number(tag)].max_len; | |
2365 | len = (len < l) ? len : l; | |
2366 | put_unaligned(tag, tl++); | |
2367 | put_unaligned(len, tl++); | |
2368 | memcpy(tl, data, len); | |
2369 | tl = (unsigned short*)((char*)tl + len); | |
2370 | if (nul_terminated) | |
2371 | *((char*)tl - 1) = 0; | |
2372 | return tl; | |
2373 | } | |
2374 | ||
2375 | static unsigned short * | |
2376 | tl_add_blob(unsigned short *tl, enum drbd_tags tag, const void *data, int len) | |
2377 | { | |
2378 | return __tl_add_blob(tl, tag, data, len, 0); | |
2379 | } | |
2380 | ||
2381 | static unsigned short * | |
2382 | tl_add_str(unsigned short *tl, enum drbd_tags tag, const char *str) | |
2383 | { | |
2384 | return __tl_add_blob(tl, tag, str, strlen(str)+1, 0); | |
2385 | } | |
2386 | ||
2387 | static unsigned short * | |
2388 | tl_add_int(unsigned short *tl, enum drbd_tags tag, const void *val) | |
2389 | { | |
2390 | put_unaligned(tag, tl++); | |
2391 | switch(tag_type(tag)) { | |
2392 | case TT_INTEGER: | |
2393 | put_unaligned(sizeof(int), tl++); | |
2394 | put_unaligned(*(int *)val, (int *)tl); | |
2395 | tl = (unsigned short*)((char*)tl+sizeof(int)); | |
2396 | break; | |
2397 | case TT_INT64: | |
2398 | put_unaligned(sizeof(u64), tl++); | |
2399 | put_unaligned(*(u64 *)val, (u64 *)tl); | |
2400 | tl = (unsigned short*)((char*)tl+sizeof(u64)); | |
2401 | break; | |
2402 | default: | |
2403 | /* someone did something stupid. */ | |
2404 | ; | |
2405 | } | |
2406 | return tl; | |
2407 | } | |
2408 | ||
2409 | void drbd_bcast_state(struct drbd_conf *mdev, union drbd_state state) | |
2410 | { | |
2411 | char buffer[sizeof(struct cn_msg)+ | |
2412 | sizeof(struct drbd_nl_cfg_reply)+ | |
2413 | sizeof(struct get_state_tag_len_struct)+ | |
2414 | sizeof(short int)]; | |
2415 | struct cn_msg *cn_reply = (struct cn_msg *) buffer; | |
2416 | struct drbd_nl_cfg_reply *reply = | |
2417 | (struct drbd_nl_cfg_reply *)cn_reply->data; | |
2418 | unsigned short *tl = reply->tag_list; | |
2419 | ||
2420 | /* dev_warn(DEV, "drbd_bcast_state() got called\n"); */ | |
2421 | ||
3f9cbe93 | 2422 | tl = get_state_to_tags((struct get_state *)&state, tl); |
b411b363 PR |
2423 | |
2424 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2425 | ||
2426 | cn_reply->id.idx = CN_IDX_DRBD; | |
2427 | cn_reply->id.val = CN_VAL_DRBD; | |
2428 | ||
8ccf218e | 2429 | cn_reply->seq = atomic_inc_return(&drbd_nl_seq); |
b411b363 PR |
2430 | cn_reply->ack = 0; /* not used here. */ |
2431 | cn_reply->len = sizeof(struct drbd_nl_cfg_reply) + | |
2432 | (int)((char *)tl - (char *)reply->tag_list); | |
2433 | cn_reply->flags = 0; | |
2434 | ||
2435 | reply->packet_type = P_get_state; | |
2436 | reply->minor = mdev_to_minor(mdev); | |
2437 | reply->ret_code = NO_ERROR; | |
2438 | ||
b411b363 PR |
2439 | cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO); |
2440 | } | |
2441 | ||
2442 | void drbd_bcast_ev_helper(struct drbd_conf *mdev, char *helper_name) | |
2443 | { | |
2444 | char buffer[sizeof(struct cn_msg)+ | |
2445 | sizeof(struct drbd_nl_cfg_reply)+ | |
2446 | sizeof(struct call_helper_tag_len_struct)+ | |
2447 | sizeof(short int)]; | |
2448 | struct cn_msg *cn_reply = (struct cn_msg *) buffer; | |
2449 | struct drbd_nl_cfg_reply *reply = | |
2450 | (struct drbd_nl_cfg_reply *)cn_reply->data; | |
2451 | unsigned short *tl = reply->tag_list; | |
2452 | ||
2453 | /* dev_warn(DEV, "drbd_bcast_state() got called\n"); */ | |
2454 | ||
2455 | tl = tl_add_str(tl, T_helper, helper_name); | |
2456 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2457 | ||
2458 | cn_reply->id.idx = CN_IDX_DRBD; | |
2459 | cn_reply->id.val = CN_VAL_DRBD; | |
2460 | ||
8ccf218e | 2461 | cn_reply->seq = atomic_inc_return(&drbd_nl_seq); |
b411b363 PR |
2462 | cn_reply->ack = 0; /* not used here. */ |
2463 | cn_reply->len = sizeof(struct drbd_nl_cfg_reply) + | |
2464 | (int)((char *)tl - (char *)reply->tag_list); | |
2465 | cn_reply->flags = 0; | |
2466 | ||
2467 | reply->packet_type = P_call_helper; | |
2468 | reply->minor = mdev_to_minor(mdev); | |
2469 | reply->ret_code = NO_ERROR; | |
2470 | ||
b411b363 PR |
2471 | cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO); |
2472 | } | |
2473 | ||
f6ffca9f AG |
2474 | void drbd_bcast_ee(struct drbd_conf *mdev, const char *reason, const int dgs, |
2475 | const char *seen_hash, const char *calc_hash, | |
db830c46 | 2476 | const struct drbd_peer_request *peer_req) |
b411b363 PR |
2477 | { |
2478 | struct cn_msg *cn_reply; | |
2479 | struct drbd_nl_cfg_reply *reply; | |
b411b363 | 2480 | unsigned short *tl; |
45bb912b LE |
2481 | struct page *page; |
2482 | unsigned len; | |
b411b363 | 2483 | |
db830c46 | 2484 | if (!peer_req) |
b411b363 PR |
2485 | return; |
2486 | if (!reason || !reason[0]) | |
2487 | return; | |
2488 | ||
2489 | /* apparently we have to memcpy twice, first to prepare the data for the | |
2490 | * struct cn_msg, then within cn_netlink_send from the cn_msg to the | |
2491 | * netlink skb. */ | |
2492 | /* receiver thread context, which is not in the writeout path (of this node), | |
2493 | * but may be in the writeout path of the _other_ node. | |
2494 | * GFP_NOIO to avoid potential "distributed deadlock". */ | |
3e3a7766 | 2495 | cn_reply = kzalloc( |
b411b363 PR |
2496 | sizeof(struct cn_msg)+ |
2497 | sizeof(struct drbd_nl_cfg_reply)+ | |
2498 | sizeof(struct dump_ee_tag_len_struct)+ | |
2499 | sizeof(short int), | |
2500 | GFP_NOIO); | |
2501 | ||
2502 | if (!cn_reply) { | |
db830c46 AG |
2503 | dev_err(DEV, "could not kmalloc buffer for drbd_bcast_ee, " |
2504 | "sector %llu, size %u\n", | |
2505 | (unsigned long long)peer_req->i.sector, | |
2506 | peer_req->i.size); | |
b411b363 PR |
2507 | return; |
2508 | } | |
2509 | ||
2510 | reply = (struct drbd_nl_cfg_reply*)cn_reply->data; | |
2511 | tl = reply->tag_list; | |
2512 | ||
2513 | tl = tl_add_str(tl, T_dump_ee_reason, reason); | |
2514 | tl = tl_add_blob(tl, T_seen_digest, seen_hash, dgs); | |
2515 | tl = tl_add_blob(tl, T_calc_digest, calc_hash, dgs); | |
db830c46 AG |
2516 | tl = tl_add_int(tl, T_ee_sector, &peer_req->i.sector); |
2517 | tl = tl_add_int(tl, T_ee_block_id, &peer_req->block_id); | |
b411b363 | 2518 | |
3129b1b9 | 2519 | /* dump the first 32k */ |
db830c46 | 2520 | len = min_t(unsigned, peer_req->i.size, 32 << 10); |
b411b363 | 2521 | put_unaligned(T_ee_data, tl++); |
3129b1b9 | 2522 | put_unaligned(len, tl++); |
b411b363 | 2523 | |
db830c46 | 2524 | page = peer_req->pages; |
45bb912b LE |
2525 | page_chain_for_each(page) { |
2526 | void *d = kmap_atomic(page, KM_USER0); | |
2527 | unsigned l = min_t(unsigned, len, PAGE_SIZE); | |
2528 | memcpy(tl, d, l); | |
2529 | kunmap_atomic(d, KM_USER0); | |
2530 | tl = (unsigned short*)((char*)tl + l); | |
2531 | len -= l; | |
3129b1b9 LE |
2532 | if (len == 0) |
2533 | break; | |
b411b363 PR |
2534 | } |
2535 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2536 | ||
2537 | cn_reply->id.idx = CN_IDX_DRBD; | |
2538 | cn_reply->id.val = CN_VAL_DRBD; | |
2539 | ||
8ccf218e | 2540 | cn_reply->seq = atomic_inc_return(&drbd_nl_seq); |
b411b363 PR |
2541 | cn_reply->ack = 0; // not used here. |
2542 | cn_reply->len = sizeof(struct drbd_nl_cfg_reply) + | |
2543 | (int)((char*)tl - (char*)reply->tag_list); | |
2544 | cn_reply->flags = 0; | |
2545 | ||
2546 | reply->packet_type = P_dump_ee; | |
2547 | reply->minor = mdev_to_minor(mdev); | |
2548 | reply->ret_code = NO_ERROR; | |
2549 | ||
b411b363 PR |
2550 | cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO); |
2551 | kfree(cn_reply); | |
2552 | } | |
2553 | ||
2554 | void drbd_bcast_sync_progress(struct drbd_conf *mdev) | |
2555 | { | |
2556 | char buffer[sizeof(struct cn_msg)+ | |
2557 | sizeof(struct drbd_nl_cfg_reply)+ | |
2558 | sizeof(struct sync_progress_tag_len_struct)+ | |
2559 | sizeof(short int)]; | |
2560 | struct cn_msg *cn_reply = (struct cn_msg *) buffer; | |
2561 | struct drbd_nl_cfg_reply *reply = | |
2562 | (struct drbd_nl_cfg_reply *)cn_reply->data; | |
2563 | unsigned short *tl = reply->tag_list; | |
2564 | unsigned long rs_left; | |
2565 | unsigned int res; | |
2566 | ||
2567 | /* no local ref, no bitmap, no syncer progress, no broadcast. */ | |
2568 | if (!get_ldev(mdev)) | |
2569 | return; | |
2570 | drbd_get_syncer_progress(mdev, &rs_left, &res); | |
2571 | put_ldev(mdev); | |
2572 | ||
2573 | tl = tl_add_int(tl, T_sync_progress, &res); | |
2574 | put_unaligned(TT_END, tl++); /* Close the tag list */ | |
2575 | ||
2576 | cn_reply->id.idx = CN_IDX_DRBD; | |
2577 | cn_reply->id.val = CN_VAL_DRBD; | |
2578 | ||
8ccf218e | 2579 | cn_reply->seq = atomic_inc_return(&drbd_nl_seq); |
b411b363 PR |
2580 | cn_reply->ack = 0; /* not used here. */ |
2581 | cn_reply->len = sizeof(struct drbd_nl_cfg_reply) + | |
2582 | (int)((char *)tl - (char *)reply->tag_list); | |
2583 | cn_reply->flags = 0; | |
2584 | ||
2585 | reply->packet_type = P_sync_progress; | |
2586 | reply->minor = mdev_to_minor(mdev); | |
2587 | reply->ret_code = NO_ERROR; | |
2588 | ||
b411b363 PR |
2589 | cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO); |
2590 | } | |
2591 | ||
2592 | int __init drbd_nl_init(void) | |
2593 | { | |
2594 | static struct cb_id cn_id_drbd; | |
2595 | int err, try=10; | |
2596 | ||
2597 | cn_id_drbd.val = CN_VAL_DRBD; | |
2598 | do { | |
2599 | cn_id_drbd.idx = cn_idx; | |
2600 | err = cn_add_callback(&cn_id_drbd, "cn_drbd", &drbd_connector_callback); | |
2601 | if (!err) | |
2602 | break; | |
2603 | cn_idx = (cn_idx + CN_IDX_STEP); | |
2604 | } while (try--); | |
2605 | ||
2606 | if (err) { | |
2607 | printk(KERN_ERR "drbd: cn_drbd failed to register\n"); | |
2608 | return err; | |
2609 | } | |
2610 | ||
2611 | return 0; | |
2612 | } | |
2613 | ||
2614 | void drbd_nl_cleanup(void) | |
2615 | { | |
2616 | static struct cb_id cn_id_drbd; | |
2617 | ||
2618 | cn_id_drbd.idx = cn_idx; | |
2619 | cn_id_drbd.val = CN_VAL_DRBD; | |
2620 | ||
2621 | cn_del_callback(&cn_id_drbd); | |
2622 | } | |
2623 | ||
2624 | void drbd_nl_send_reply(struct cn_msg *req, int ret_code) | |
2625 | { | |
2626 | char buffer[sizeof(struct cn_msg)+sizeof(struct drbd_nl_cfg_reply)]; | |
2627 | struct cn_msg *cn_reply = (struct cn_msg *) buffer; | |
2628 | struct drbd_nl_cfg_reply *reply = | |
2629 | (struct drbd_nl_cfg_reply *)cn_reply->data; | |
2630 | int rr; | |
2631 | ||
3e3a7766 | 2632 | memset(buffer, 0, sizeof(buffer)); |
b411b363 PR |
2633 | cn_reply->id = req->id; |
2634 | ||
2635 | cn_reply->seq = req->seq; | |
2636 | cn_reply->ack = req->ack + 1; | |
2637 | cn_reply->len = sizeof(struct drbd_nl_cfg_reply); | |
2638 | cn_reply->flags = 0; | |
2639 | ||
42ff269d | 2640 | reply->packet_type = P_return_code_only; |
b411b363 PR |
2641 | reply->minor = ((struct drbd_nl_cfg_req *)req->data)->drbd_minor; |
2642 | reply->ret_code = ret_code; | |
2643 | ||
b411b363 PR |
2644 | rr = cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO); |
2645 | if (rr && rr != -ESRCH) | |
2646 | printk(KERN_INFO "drbd: cn_netlink_send()=%d\n", rr); | |
2647 | } | |
2648 |