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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/blkpg.h>
33#include <linux/cpumask.h>
34#include "drbd_int.h"
35#include "drbd_req.h"
36#include "drbd_wrappers.h"
37#include <asm/unaligned.h>
38#include <linux/drbd_limits.h>
39#include <linux/kthread.h>
40
41#include <net/genetlink.h>
42
43
44
45
46
47int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info);
48int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info);
49
50int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info);
51int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info);
52int drbd_adm_down(struct sk_buff *skb, struct genl_info *info);
53
54int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info);
55int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info);
56int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info);
57int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info);
58int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info);
59int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info);
60int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info);
61int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info);
62int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info);
63int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info);
64int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info);
65int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info);
66int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info);
67int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info);
68int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info);
69int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info);
70int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info);
71int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info);
72int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info);
73int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info);
74
75int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb);
76
77#include <linux/drbd_genl_api.h>
78#include "drbd_nla.h"
79#include <linux/genl_magic_func.h>
80
81
82static char *drbd_m_holder = "Hands off! this is DRBD's meta data device.";
83
84
85
86
87
88static struct drbd_config_context {
89
90 unsigned int minor;
91
92 unsigned int volume;
93#define VOLUME_UNSPECIFIED (-1U)
94
95
96 char *resource_name;
97 struct nlattr *my_addr;
98 struct nlattr *peer_addr;
99
100
101 struct sk_buff *reply_skb;
102
103 struct drbd_genlmsghdr *reply_dh;
104
105 struct drbd_conf *mdev;
106 struct drbd_tconn *tconn;
107} adm_ctx;
108
109static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info)
110{
111 genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb))));
112 if (genlmsg_reply(skb, info))
113 printk(KERN_ERR "drbd: error sending genl reply\n");
114}
115
116
117
118int drbd_msg_put_info(const char *info)
119{
120 struct sk_buff *skb = adm_ctx.reply_skb;
121 struct nlattr *nla;
122 int err = -EMSGSIZE;
123
124 if (!info || !info[0])
125 return 0;
126
127 nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY);
128 if (!nla)
129 return err;
130
131 err = nla_put_string(skb, T_info_text, info);
132 if (err) {
133 nla_nest_cancel(skb, nla);
134 return err;
135 } else
136 nla_nest_end(skb, nla);
137 return 0;
138}
139
140
141
142
143
144
145#define DRBD_ADM_NEED_MINOR 1
146#define DRBD_ADM_NEED_RESOURCE 2
147#define DRBD_ADM_NEED_CONNECTION 4
148static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info,
149 unsigned flags)
150{
151 struct drbd_genlmsghdr *d_in = info->userhdr;
152 const u8 cmd = info->genlhdr->cmd;
153 int err;
154
155 memset(&adm_ctx, 0, sizeof(adm_ctx));
156
157
158 if (cmd != DRBD_ADM_GET_STATUS && !capable(CAP_NET_ADMIN))
159 return -EPERM;
160
161 adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
162 if (!adm_ctx.reply_skb) {
163 err = -ENOMEM;
164 goto fail;
165 }
166
167 adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb,
168 info, &drbd_genl_family, 0, cmd);
169
170
171 if (!adm_ctx.reply_dh) {
172 err = -ENOMEM;
173 goto fail;
174 }
175
176 adm_ctx.reply_dh->minor = d_in->minor;
177 adm_ctx.reply_dh->ret_code = NO_ERROR;
178
179 adm_ctx.volume = VOLUME_UNSPECIFIED;
180 if (info->attrs[DRBD_NLA_CFG_CONTEXT]) {
181 struct nlattr *nla;
182
183 err = drbd_cfg_context_from_attrs(NULL, info);
184 if (err)
185 goto fail;
186
187
188
189 err = nla_put_nohdr(adm_ctx.reply_skb,
190 info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len,
191 info->attrs[DRBD_NLA_CFG_CONTEXT]);
192 if (err)
193 goto fail;
194
195
196 nla = nested_attr_tb[__nla_type(T_ctx_volume)];
197 if (nla)
198 adm_ctx.volume = nla_get_u32(nla);
199 nla = nested_attr_tb[__nla_type(T_ctx_resource_name)];
200 if (nla)
201 adm_ctx.resource_name = nla_data(nla);
202 adm_ctx.my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)];
203 adm_ctx.peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)];
204 if ((adm_ctx.my_addr &&
205 nla_len(adm_ctx.my_addr) > sizeof(adm_ctx.tconn->my_addr)) ||
206 (adm_ctx.peer_addr &&
207 nla_len(adm_ctx.peer_addr) > sizeof(adm_ctx.tconn->peer_addr))) {
208 err = -EINVAL;
209 goto fail;
210 }
211 }
212
213 adm_ctx.minor = d_in->minor;
214 adm_ctx.mdev = minor_to_mdev(d_in->minor);
215 adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name);
216
217 if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) {
218 drbd_msg_put_info("unknown minor");
219 return ERR_MINOR_INVALID;
220 }
221 if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_RESOURCE)) {
222 drbd_msg_put_info("unknown resource");
223 return ERR_INVALID_REQUEST;
224 }
225
226 if (flags & DRBD_ADM_NEED_CONNECTION) {
227 if (adm_ctx.tconn && !(flags & DRBD_ADM_NEED_RESOURCE)) {
228 drbd_msg_put_info("no resource name expected");
229 return ERR_INVALID_REQUEST;
230 }
231 if (adm_ctx.mdev) {
232 drbd_msg_put_info("no minor number expected");
233 return ERR_INVALID_REQUEST;
234 }
235 if (adm_ctx.my_addr && adm_ctx.peer_addr)
236 adm_ctx.tconn = conn_get_by_addrs(nla_data(adm_ctx.my_addr),
237 nla_len(adm_ctx.my_addr),
238 nla_data(adm_ctx.peer_addr),
239 nla_len(adm_ctx.peer_addr));
240 if (!adm_ctx.tconn) {
241 drbd_msg_put_info("unknown connection");
242 return ERR_INVALID_REQUEST;
243 }
244 }
245
246
247 if (adm_ctx.mdev && adm_ctx.tconn &&
248 adm_ctx.mdev->tconn != adm_ctx.tconn) {
249 pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n",
250 adm_ctx.minor, adm_ctx.resource_name,
251 adm_ctx.mdev->tconn->name);
252 drbd_msg_put_info("minor exists in different resource");
253 return ERR_INVALID_REQUEST;
254 }
255 if (adm_ctx.mdev &&
256 adm_ctx.volume != VOLUME_UNSPECIFIED &&
257 adm_ctx.volume != adm_ctx.mdev->vnr) {
258 pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
259 adm_ctx.minor, adm_ctx.volume,
260 adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name);
261 drbd_msg_put_info("minor exists as different volume");
262 return ERR_INVALID_REQUEST;
263 }
264
265 return NO_ERROR;
266
267fail:
268 nlmsg_free(adm_ctx.reply_skb);
269 adm_ctx.reply_skb = NULL;
270 return err;
271}
272
273static int drbd_adm_finish(struct genl_info *info, int retcode)
274{
275 if (adm_ctx.tconn) {
276 kref_put(&adm_ctx.tconn->kref, &conn_destroy);
277 adm_ctx.tconn = NULL;
278 }
279
280 if (!adm_ctx.reply_skb)
281 return -ENOMEM;
282
283 adm_ctx.reply_dh->ret_code = retcode;
284 drbd_adm_send_reply(adm_ctx.reply_skb, info);
285 return 0;
286}
287
288static void setup_khelper_env(struct drbd_tconn *tconn, char **envp)
289{
290 char *afs;
291
292
293 if (tconn->my_addr_len == 0 || tconn->peer_addr_len == 0)
294 return;
295
296 switch (((struct sockaddr *)&tconn->peer_addr)->sa_family) {
297 case AF_INET6:
298 afs = "ipv6";
299 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6",
300 &((struct sockaddr_in6 *)&tconn->peer_addr)->sin6_addr);
301 break;
302 case AF_INET:
303 afs = "ipv4";
304 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
305 &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr);
306 break;
307 default:
308 afs = "ssocks";
309 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
310 &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr);
311 }
312 snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs);
313}
314
315int drbd_khelper(struct drbd_conf *mdev, char *cmd)
316{
317 char *envp[] = { "HOME=/",
318 "TERM=linux",
319 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
320 (char[20]) { },
321 (char[60]) { },
322 NULL };
323 char mb[12];
324 char *argv[] = {usermode_helper, cmd, mb, NULL };
325 struct drbd_tconn *tconn = mdev->tconn;
326 struct sib_info sib;
327 int ret;
328
329 if (current == tconn->worker.task)
330 set_bit(CALLBACK_PENDING, &tconn->flags);
331
332 snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev));
333 setup_khelper_env(tconn, envp);
334
335
336
337 drbd_md_sync(mdev);
338
339 dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb);
340 sib.sib_reason = SIB_HELPER_PRE;
341 sib.helper_name = cmd;
342 drbd_bcast_event(mdev, &sib);
343 ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC);
344 if (ret)
345 dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
346 usermode_helper, cmd, mb,
347 (ret >> 8) & 0xff, ret);
348 else
349 dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
350 usermode_helper, cmd, mb,
351 (ret >> 8) & 0xff, ret);
352 sib.sib_reason = SIB_HELPER_POST;
353 sib.helper_exit_code = ret;
354 drbd_bcast_event(mdev, &sib);
355
356 if (current == tconn->worker.task)
357 clear_bit(CALLBACK_PENDING, &tconn->flags);
358
359 if (ret < 0)
360 ret = 0;
361
362 return ret;
363}
364
365int conn_khelper(struct drbd_tconn *tconn, char *cmd)
366{
367 char *envp[] = { "HOME=/",
368 "TERM=linux",
369 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
370 (char[20]) { },
371 (char[60]) { },
372 NULL };
373 char *argv[] = {usermode_helper, cmd, tconn->name, NULL };
374 int ret;
375
376 setup_khelper_env(tconn, envp);
377 conn_md_sync(tconn);
378
379 conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name);
380
381
382 ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC);
383 if (ret)
384 conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
385 usermode_helper, cmd, tconn->name,
386 (ret >> 8) & 0xff, ret);
387 else
388 conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
389 usermode_helper, cmd, tconn->name,
390 (ret >> 8) & 0xff, ret);
391
392
393 if (ret < 0)
394 ret = 0;
395
396 return ret;
397}
398
399static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn)
400{
401 enum drbd_fencing_p fp = FP_NOT_AVAIL;
402 struct drbd_conf *mdev;
403 int vnr;
404
405 rcu_read_lock();
406 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
407 if (get_ldev_if_state(mdev, D_CONSISTENT)) {
408 fp = max_t(enum drbd_fencing_p, fp,
409 rcu_dereference(mdev->ldev->disk_conf)->fencing);
410 put_ldev(mdev);
411 }
412 }
413 rcu_read_unlock();
414
415 return fp;
416}
417
418bool conn_try_outdate_peer(struct drbd_tconn *tconn)
419{
420 unsigned int connect_cnt;
421 union drbd_state mask = { };
422 union drbd_state val = { };
423 enum drbd_fencing_p fp;
424 char *ex_to_string;
425 int r;
426
427 if (tconn->cstate >= C_WF_REPORT_PARAMS) {
428 conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n");
429 return false;
430 }
431
432 spin_lock_irq(&tconn->req_lock);
433 connect_cnt = tconn->connect_cnt;
434 spin_unlock_irq(&tconn->req_lock);
435
436 fp = highest_fencing_policy(tconn);
437 switch (fp) {
438 case FP_NOT_AVAIL:
439 conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n");
440 goto out;
441 case FP_DONT_CARE:
442 return true;
443 default: ;
444 }
445
446 r = conn_khelper(tconn, "fence-peer");
447
448 switch ((r>>8) & 0xff) {
449 case 3:
450 ex_to_string = "peer is inconsistent or worse";
451 mask.pdsk = D_MASK;
452 val.pdsk = D_INCONSISTENT;
453 break;
454 case 4:
455 ex_to_string = "peer was fenced";
456 mask.pdsk = D_MASK;
457 val.pdsk = D_OUTDATED;
458 break;
459 case 5:
460 if (conn_highest_disk(tconn) == D_UP_TO_DATE) {
461
462 ex_to_string = "peer is unreachable, assumed to be dead";
463 mask.pdsk = D_MASK;
464 val.pdsk = D_OUTDATED;
465 } else {
466 ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
467 }
468 break;
469 case 6:
470
471
472 ex_to_string = "peer is active";
473 conn_warn(tconn, "Peer is primary, outdating myself.\n");
474 mask.disk = D_MASK;
475 val.disk = D_OUTDATED;
476 break;
477 case 7:
478 if (fp != FP_STONITH)
479 conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n");
480 ex_to_string = "peer was stonithed";
481 mask.pdsk = D_MASK;
482 val.pdsk = D_OUTDATED;
483 break;
484 default:
485
486 conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);
487 return false;
488 }
489
490 conn_info(tconn, "fence-peer helper returned %d (%s)\n",
491 (r>>8) & 0xff, ex_to_string);
492
493 out:
494
495
496
497
498
499 spin_lock_irq(&tconn->req_lock);
500 if (tconn->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &tconn->flags)) {
501 if (tconn->connect_cnt != connect_cnt)
502
503
504 conn_info(tconn, "Ignoring fence-peer exit code\n");
505 else
506 _conn_request_state(tconn, mask, val, CS_VERBOSE);
507 }
508 spin_unlock_irq(&tconn->req_lock);
509
510 return conn_highest_pdsk(tconn) <= D_OUTDATED;
511}
512
513static int _try_outdate_peer_async(void *data)
514{
515 struct drbd_tconn *tconn = (struct drbd_tconn *)data;
516
517 conn_try_outdate_peer(tconn);
518
519 kref_put(&tconn->kref, &conn_destroy);
520 return 0;
521}
522
523void conn_try_outdate_peer_async(struct drbd_tconn *tconn)
524{
525 struct task_struct *opa;
526
527 kref_get(&tconn->kref);
528 opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h");
529 if (IS_ERR(opa)) {
530 conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n");
531 kref_put(&tconn->kref, &conn_destroy);
532 }
533}
534
535enum drbd_state_rv
536drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
537{
538 const int max_tries = 4;
539 enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
540 struct net_conf *nc;
541 int try = 0;
542 int forced = 0;
543 union drbd_state mask, val;
544
545 if (new_role == R_PRIMARY)
546 request_ping(mdev->tconn);
547
548 mutex_lock(mdev->state_mutex);
549
550 mask.i = 0; mask.role = R_MASK;
551 val.i = 0; val.role = new_role;
552
553 while (try++ < max_tries) {
554 rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE);
555
556
557
558 if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
559 val.pdsk = 0;
560 mask.pdsk = 0;
561 continue;
562 }
563
564 if (rv == SS_NO_UP_TO_DATE_DISK && force &&
565 (mdev->state.disk < D_UP_TO_DATE &&
566 mdev->state.disk >= D_INCONSISTENT)) {
567 mask.disk = D_MASK;
568 val.disk = D_UP_TO_DATE;
569 forced = 1;
570 continue;
571 }
572
573 if (rv == SS_NO_UP_TO_DATE_DISK &&
574 mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) {
575 D_ASSERT(mdev->state.pdsk == D_UNKNOWN);
576
577 if (conn_try_outdate_peer(mdev->tconn)) {
578 val.disk = D_UP_TO_DATE;
579 mask.disk = D_MASK;
580 }
581 continue;
582 }
583
584 if (rv == SS_NOTHING_TO_DO)
585 goto out;
586 if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
587 if (!conn_try_outdate_peer(mdev->tconn) && force) {
588 dev_warn(DEV, "Forced into split brain situation!\n");
589 mask.pdsk = D_MASK;
590 val.pdsk = D_OUTDATED;
591
592 }
593 continue;
594 }
595 if (rv == SS_TWO_PRIMARIES) {
596
597
598 int timeo;
599 rcu_read_lock();
600 nc = rcu_dereference(mdev->tconn->net_conf);
601 timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
602 rcu_read_unlock();
603 schedule_timeout_interruptible(timeo);
604 if (try < max_tries)
605 try = max_tries - 1;
606 continue;
607 }
608 if (rv < SS_SUCCESS) {
609 rv = _drbd_request_state(mdev, mask, val,
610 CS_VERBOSE + CS_WAIT_COMPLETE);
611 if (rv < SS_SUCCESS)
612 goto out;
613 }
614 break;
615 }
616
617 if (rv < SS_SUCCESS)
618 goto out;
619
620 if (forced)
621 dev_warn(DEV, "Forced to consider local data as UpToDate!\n");
622
623
624 wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0);
625
626
627
628 if (new_role == R_SECONDARY) {
629 set_disk_ro(mdev->vdisk, true);
630 if (get_ldev(mdev)) {
631 mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
632 put_ldev(mdev);
633 }
634 } else {
635 mutex_lock(&mdev->tconn->conf_update);
636 nc = mdev->tconn->net_conf;
637 if (nc)
638 nc->discard_my_data = 0;
639 mutex_unlock(&mdev->tconn->conf_update);
640
641 set_disk_ro(mdev->vdisk, false);
642 if (get_ldev(mdev)) {
643 if (((mdev->state.conn < C_CONNECTED ||
644 mdev->state.pdsk <= D_FAILED)
645 && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced)
646 drbd_uuid_new_current(mdev);
647
648 mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
649 put_ldev(mdev);
650 }
651 }
652
653
654
655
656 if (mdev->state.conn >= C_WF_REPORT_PARAMS) {
657
658 if (forced)
659 drbd_send_uuids(mdev);
660 drbd_send_current_state(mdev);
661 }
662
663 drbd_md_sync(mdev);
664
665 kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
666out:
667 mutex_unlock(mdev->state_mutex);
668 return rv;
669}
670
671static const char *from_attrs_err_to_txt(int err)
672{
673 return err == -ENOMSG ? "required attribute missing" :
674 err == -EOPNOTSUPP ? "unknown mandatory attribute" :
675 err == -EEXIST ? "can not change invariant setting" :
676 "invalid attribute value";
677}
678
679int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info)
680{
681 struct set_role_parms parms;
682 int err;
683 enum drbd_ret_code retcode;
684
685 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
686 if (!adm_ctx.reply_skb)
687 return retcode;
688 if (retcode != NO_ERROR)
689 goto out;
690
691 memset(&parms, 0, sizeof(parms));
692 if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) {
693 err = set_role_parms_from_attrs(&parms, info);
694 if (err) {
695 retcode = ERR_MANDATORY_TAG;
696 drbd_msg_put_info(from_attrs_err_to_txt(err));
697 goto out;
698 }
699 }
700
701 if (info->genlhdr->cmd == DRBD_ADM_PRIMARY)
702 retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate);
703 else
704 retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0);
705out:
706 drbd_adm_finish(info, retcode);
707 return 0;
708}
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731static void drbd_md_set_sector_offsets(struct drbd_conf *mdev,
732 struct drbd_backing_dev *bdev)
733{
734 sector_t md_size_sect = 0;
735 unsigned int al_size_sect = bdev->md.al_size_4k * 8;
736
737 bdev->md.md_offset = drbd_md_ss(bdev);
738
739 switch (bdev->md.meta_dev_idx) {
740 default:
741
742 bdev->md.md_size_sect = MD_128MB_SECT;
743 bdev->md.al_offset = MD_4kB_SECT;
744 bdev->md.bm_offset = MD_4kB_SECT + al_size_sect;
745 break;
746 case DRBD_MD_INDEX_FLEX_EXT:
747
748 bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev);
749 bdev->md.al_offset = MD_4kB_SECT;
750 bdev->md.bm_offset = MD_4kB_SECT + al_size_sect;
751 break;
752 case DRBD_MD_INDEX_INTERNAL:
753 case DRBD_MD_INDEX_FLEX_INT:
754
755 bdev->md.al_offset = -al_size_sect;
756
757 md_size_sect = drbd_get_capacity(bdev->backing_bdev);
758 md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT);
759 md_size_sect = BM_SECT_TO_EXT(md_size_sect);
760 md_size_sect = ALIGN(md_size_sect, 8);
761
762
763
764 md_size_sect += MD_4kB_SECT + al_size_sect;
765
766 bdev->md.md_size_sect = md_size_sect;
767
768 bdev->md.bm_offset = -md_size_sect + MD_4kB_SECT;
769 break;
770 }
771}
772
773
774char *ppsize(char *buf, unsigned long long size)
775{
776
777
778 static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
779 int base = 0;
780 while (size >= 10000 && base < sizeof(units)-1) {
781
782 size = (size >> 10) + !!(size & (1<<9));
783 base++;
784 }
785 sprintf(buf, "%u %cB", (unsigned)size, units[base]);
786
787 return buf;
788}
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809void drbd_suspend_io(struct drbd_conf *mdev)
810{
811 set_bit(SUSPEND_IO, &mdev->flags);
812 if (drbd_suspended(mdev))
813 return;
814 wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt));
815}
816
817void drbd_resume_io(struct drbd_conf *mdev)
818{
819 clear_bit(SUSPEND_IO, &mdev->flags);
820 wake_up(&mdev->misc_wait);
821}
822
823
824
825
826
827
828
829
830enum determine_dev_size
831drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags, struct resize_parms *rs) __must_hold(local)
832{
833 sector_t prev_first_sect, prev_size;
834 sector_t la_size_sect, u_size;
835 struct drbd_md *md = &mdev->ldev->md;
836 u32 prev_al_stripe_size_4k;
837 u32 prev_al_stripes;
838 sector_t size;
839 char ppb[10];
840 void *buffer;
841
842 int md_moved, la_size_changed;
843 enum determine_dev_size rv = DS_UNCHANGED;
844
845
846
847
848
849
850
851
852
853
854 drbd_suspend_io(mdev);
855 buffer = drbd_md_get_buffer(mdev);
856 if (!buffer) {
857 drbd_resume_io(mdev);
858 return DS_ERROR;
859 }
860
861
862 wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
863
864 prev_first_sect = drbd_md_first_sector(mdev->ldev);
865 prev_size = mdev->ldev->md.md_size_sect;
866 la_size_sect = mdev->ldev->md.la_size_sect;
867
868 if (rs) {
869
870
871 prev_al_stripes = md->al_stripes;
872 prev_al_stripe_size_4k = md->al_stripe_size_4k;
873
874 md->al_stripes = rs->al_stripes;
875 md->al_stripe_size_4k = rs->al_stripe_size / 4;
876 md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4;
877 }
878
879 drbd_md_set_sector_offsets(mdev, mdev->ldev);
880
881 rcu_read_lock();
882 u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size;
883 rcu_read_unlock();
884 size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED);
885
886 if (size < la_size_sect) {
887 if (rs && u_size == 0) {
888
889
890 dev_warn(DEV, "Implicit shrink not allowed. "
891 "Use --size=%llus for explicit shrink.\n",
892 (unsigned long long)size);
893 rv = DS_ERROR_SHRINK;
894 }
895 if (u_size > size)
896 rv = DS_ERROR_SPACE_MD;
897 if (rv != DS_UNCHANGED)
898 goto err_out;
899 }
900
901 if (drbd_get_capacity(mdev->this_bdev) != size ||
902 drbd_bm_capacity(mdev) != size) {
903 int err;
904 err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC));
905 if (unlikely(err)) {
906
907 size = drbd_bm_capacity(mdev)>>1;
908 if (size == 0) {
909 dev_err(DEV, "OUT OF MEMORY! "
910 "Could not allocate bitmap!\n");
911 } else {
912 dev_err(DEV, "BM resizing failed. "
913 "Leaving size unchanged at size = %lu KB\n",
914 (unsigned long)size);
915 }
916 rv = DS_ERROR;
917 }
918
919 drbd_set_my_capacity(mdev, size);
920 mdev->ldev->md.la_size_sect = size;
921 dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1),
922 (unsigned long long)size>>1);
923 }
924 if (rv <= DS_ERROR)
925 goto err_out;
926
927 la_size_changed = (la_size_sect != mdev->ldev->md.la_size_sect);
928
929 md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev)
930 || prev_size != mdev->ldev->md.md_size_sect;
931
932 if (la_size_changed || md_moved || rs) {
933 u32 prev_flags;
934
935 drbd_al_shrink(mdev);
936
937 prev_flags = md->flags;
938 md->flags &= ~MDF_PRIMARY_IND;
939 drbd_md_write(mdev, buffer);
940
941 dev_info(DEV, "Writing the whole bitmap, %s\n",
942 la_size_changed && md_moved ? "size changed and md moved" :
943 la_size_changed ? "size changed" : "md moved");
944
945 drbd_bitmap_io(mdev, md_moved ? &drbd_bm_write_all : &drbd_bm_write,
946 "size changed", BM_LOCKED_MASK);
947 drbd_initialize_al(mdev, buffer);
948
949 md->flags = prev_flags;
950 drbd_md_write(mdev, buffer);
951
952 if (rs)
953 dev_info(DEV, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n",
954 md->al_stripes, md->al_stripe_size_4k * 4);
955 }
956
957 if (size > la_size_sect)
958 rv = DS_GREW;
959 if (size < la_size_sect)
960 rv = DS_SHRUNK;
961
962 if (0) {
963 err_out:
964 if (rs) {
965 md->al_stripes = prev_al_stripes;
966 md->al_stripe_size_4k = prev_al_stripe_size_4k;
967 md->al_size_4k = (u64)prev_al_stripes * prev_al_stripe_size_4k;
968
969 drbd_md_set_sector_offsets(mdev, mdev->ldev);
970 }
971 }
972 lc_unlock(mdev->act_log);
973 wake_up(&mdev->al_wait);
974 drbd_md_put_buffer(mdev);
975 drbd_resume_io(mdev);
976
977 return rv;
978}
979
980sector_t
981drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
982 sector_t u_size, int assume_peer_has_space)
983{
984 sector_t p_size = mdev->p_size;
985 sector_t la_size_sect = bdev->md.la_size_sect;
986 sector_t m_size;
987 sector_t size = 0;
988
989 m_size = drbd_get_max_capacity(bdev);
990
991 if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) {
992 dev_warn(DEV, "Resize while not connected was forced by the user!\n");
993 p_size = m_size;
994 }
995
996 if (p_size && m_size) {
997 size = min_t(sector_t, p_size, m_size);
998 } else {
999 if (la_size_sect) {
1000 size = la_size_sect;
1001 if (m_size && m_size < size)
1002 size = m_size;
1003 if (p_size && p_size < size)
1004 size = p_size;
1005 } else {
1006 if (m_size)
1007 size = m_size;
1008 if (p_size)
1009 size = p_size;
1010 }
1011 }
1012
1013 if (size == 0)
1014 dev_err(DEV, "Both nodes diskless!\n");
1015
1016 if (u_size) {
1017 if (u_size > size)
1018 dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n",
1019 (unsigned long)u_size>>1, (unsigned long)size>>1);
1020 else
1021 size = u_size;
1022 }
1023
1024 return size;
1025}
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc)
1036{
1037 struct lru_cache *n, *t;
1038 struct lc_element *e;
1039 unsigned int in_use;
1040 int i;
1041
1042 if (mdev->act_log &&
1043 mdev->act_log->nr_elements == dc->al_extents)
1044 return 0;
1045
1046 in_use = 0;
1047 t = mdev->act_log;
1048 n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION,
1049 dc->al_extents, sizeof(struct lc_element), 0);
1050
1051 if (n == NULL) {
1052 dev_err(DEV, "Cannot allocate act_log lru!\n");
1053 return -ENOMEM;
1054 }
1055 spin_lock_irq(&mdev->al_lock);
1056 if (t) {
1057 for (i = 0; i < t->nr_elements; i++) {
1058 e = lc_element_by_index(t, i);
1059 if (e->refcnt)
1060 dev_err(DEV, "refcnt(%d)==%d\n",
1061 e->lc_number, e->refcnt);
1062 in_use += e->refcnt;
1063 }
1064 }
1065 if (!in_use)
1066 mdev->act_log = n;
1067 spin_unlock_irq(&mdev->al_lock);
1068 if (in_use) {
1069 dev_err(DEV, "Activity log still in use!\n");
1070 lc_destroy(n);
1071 return -EBUSY;
1072 } else {
1073 if (t)
1074 lc_destroy(t);
1075 }
1076 drbd_md_mark_dirty(mdev);
1077 return 0;
1078}
1079
1080static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size)
1081{
1082 struct request_queue * const q = mdev->rq_queue;
1083 unsigned int max_hw_sectors = max_bio_size >> 9;
1084 unsigned int max_segments = 0;
1085
1086 if (get_ldev_if_state(mdev, D_ATTACHING)) {
1087 struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
1088
1089 max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
1090 rcu_read_lock();
1091 max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs;
1092 rcu_read_unlock();
1093 put_ldev(mdev);
1094 }
1095
1096 blk_queue_logical_block_size(q, 512);
1097 blk_queue_max_hw_sectors(q, max_hw_sectors);
1098
1099 blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
1100 blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1);
1101
1102 if (get_ldev_if_state(mdev, D_ATTACHING)) {
1103 struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
1104
1105 blk_queue_stack_limits(q, b);
1106
1107 if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) {
1108 dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
1109 q->backing_dev_info.ra_pages,
1110 b->backing_dev_info.ra_pages);
1111 q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages;
1112 }
1113 put_ldev(mdev);
1114 }
1115}
1116
1117void drbd_reconsider_max_bio_size(struct drbd_conf *mdev)
1118{
1119 unsigned int now, new, local, peer;
1120
1121 now = queue_max_hw_sectors(mdev->rq_queue) << 9;
1122 local = mdev->local_max_bio_size;
1123 peer = mdev->peer_max_bio_size;
1124
1125 if (get_ldev_if_state(mdev, D_ATTACHING)) {
1126 local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9;
1127 mdev->local_max_bio_size = local;
1128 put_ldev(mdev);
1129 }
1130 local = min(local, DRBD_MAX_BIO_SIZE);
1131
1132
1133
1134
1135 if (mdev->state.conn >= C_CONNECTED) {
1136 if (mdev->tconn->agreed_pro_version < 94)
1137 peer = min( mdev->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
1138
1139 else if (mdev->tconn->agreed_pro_version == 94)
1140 peer = DRBD_MAX_SIZE_H80_PACKET;
1141 else if (mdev->tconn->agreed_pro_version < 100)
1142 peer = DRBD_MAX_BIO_SIZE_P95;
1143 else
1144 peer = DRBD_MAX_BIO_SIZE;
1145 }
1146
1147 new = min(local, peer);
1148
1149 if (mdev->state.role == R_PRIMARY && new < now)
1150 dev_err(DEV, "ASSERT FAILED new < now; (%u < %u)\n", new, now);
1151
1152 if (new != now)
1153 dev_info(DEV, "max BIO size = %u\n", new);
1154
1155 drbd_setup_queue_param(mdev, new);
1156}
1157
1158
1159static void conn_reconfig_start(struct drbd_tconn *tconn)
1160{
1161 drbd_thread_start(&tconn->worker);
1162 conn_flush_workqueue(tconn);
1163}
1164
1165
1166static void conn_reconfig_done(struct drbd_tconn *tconn)
1167{
1168 bool stop_threads;
1169 spin_lock_irq(&tconn->req_lock);
1170 stop_threads = conn_all_vols_unconf(tconn) &&
1171 tconn->cstate == C_STANDALONE;
1172 spin_unlock_irq(&tconn->req_lock);
1173 if (stop_threads) {
1174
1175
1176 drbd_thread_stop(&tconn->receiver);
1177 drbd_thread_stop(&tconn->worker);
1178 }
1179}
1180
1181
1182static void drbd_suspend_al(struct drbd_conf *mdev)
1183{
1184 int s = 0;
1185
1186 if (!lc_try_lock(mdev->act_log)) {
1187 dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n");
1188 return;
1189 }
1190
1191 drbd_al_shrink(mdev);
1192 spin_lock_irq(&mdev->tconn->req_lock);
1193 if (mdev->state.conn < C_CONNECTED)
1194 s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags);
1195 spin_unlock_irq(&mdev->tconn->req_lock);
1196 lc_unlock(mdev->act_log);
1197
1198 if (s)
1199 dev_info(DEV, "Suspended AL updates\n");
1200}
1201
1202
1203static bool should_set_defaults(struct genl_info *info)
1204{
1205 unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags;
1206 return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS);
1207}
1208
1209static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev)
1210{
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224 const unsigned int max_al_nr = DRBD_AL_EXTENTS_MAX;
1225 const unsigned int sufficient_on_disk =
1226 (max_al_nr + AL_CONTEXT_PER_TRANSACTION -1)
1227 /AL_CONTEXT_PER_TRANSACTION;
1228
1229 unsigned int al_size_4k = bdev->md.al_size_4k;
1230
1231 if (al_size_4k > sufficient_on_disk)
1232 return max_al_nr;
1233
1234 return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION;
1235}
1236
1237int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
1238{
1239 enum drbd_ret_code retcode;
1240 struct drbd_conf *mdev;
1241 struct disk_conf *new_disk_conf, *old_disk_conf;
1242 struct fifo_buffer *old_plan = NULL, *new_plan = NULL;
1243 int err, fifo_size;
1244
1245 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
1246 if (!adm_ctx.reply_skb)
1247 return retcode;
1248 if (retcode != NO_ERROR)
1249 goto out;
1250
1251 mdev = adm_ctx.mdev;
1252
1253
1254
1255 if (!get_ldev(mdev)) {
1256 retcode = ERR_NO_DISK;
1257 goto out;
1258 }
1259
1260 new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
1261 if (!new_disk_conf) {
1262 retcode = ERR_NOMEM;
1263 goto fail;
1264 }
1265
1266 mutex_lock(&mdev->tconn->conf_update);
1267 old_disk_conf = mdev->ldev->disk_conf;
1268 *new_disk_conf = *old_disk_conf;
1269 if (should_set_defaults(info))
1270 set_disk_conf_defaults(new_disk_conf);
1271
1272 err = disk_conf_from_attrs_for_change(new_disk_conf, info);
1273 if (err && err != -ENOMSG) {
1274 retcode = ERR_MANDATORY_TAG;
1275 drbd_msg_put_info(from_attrs_err_to_txt(err));
1276 }
1277
1278 if (!expect(new_disk_conf->resync_rate >= 1))
1279 new_disk_conf->resync_rate = 1;
1280
1281 if (new_disk_conf->al_extents < DRBD_AL_EXTENTS_MIN)
1282 new_disk_conf->al_extents = DRBD_AL_EXTENTS_MIN;
1283 if (new_disk_conf->al_extents > drbd_al_extents_max(mdev->ldev))
1284 new_disk_conf->al_extents = drbd_al_extents_max(mdev->ldev);
1285
1286 if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
1287 new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
1288
1289 fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
1290 if (fifo_size != mdev->rs_plan_s->size) {
1291 new_plan = fifo_alloc(fifo_size);
1292 if (!new_plan) {
1293 dev_err(DEV, "kmalloc of fifo_buffer failed");
1294 retcode = ERR_NOMEM;
1295 goto fail_unlock;
1296 }
1297 }
1298
1299 drbd_suspend_io(mdev);
1300 wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
1301 drbd_al_shrink(mdev);
1302 err = drbd_check_al_size(mdev, new_disk_conf);
1303 lc_unlock(mdev->act_log);
1304 wake_up(&mdev->al_wait);
1305 drbd_resume_io(mdev);
1306
1307 if (err) {
1308 retcode = ERR_NOMEM;
1309 goto fail_unlock;
1310 }
1311
1312 write_lock_irq(&global_state_lock);
1313 retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after);
1314 if (retcode == NO_ERROR) {
1315 rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
1316 drbd_resync_after_changed(mdev);
1317 }
1318 write_unlock_irq(&global_state_lock);
1319
1320 if (retcode != NO_ERROR)
1321 goto fail_unlock;
1322
1323 if (new_plan) {
1324 old_plan = mdev->rs_plan_s;
1325 rcu_assign_pointer(mdev->rs_plan_s, new_plan);
1326 }
1327
1328 mutex_unlock(&mdev->tconn->conf_update);
1329
1330 if (new_disk_conf->al_updates)
1331 mdev->ldev->md.flags &= ~MDF_AL_DISABLED;
1332 else
1333 mdev->ldev->md.flags |= MDF_AL_DISABLED;
1334
1335 if (new_disk_conf->md_flushes)
1336 clear_bit(MD_NO_FUA, &mdev->flags);
1337 else
1338 set_bit(MD_NO_FUA, &mdev->flags);
1339
1340 drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush);
1341
1342 drbd_md_sync(mdev);
1343
1344 if (mdev->state.conn >= C_CONNECTED)
1345 drbd_send_sync_param(mdev);
1346
1347 synchronize_rcu();
1348 kfree(old_disk_conf);
1349 kfree(old_plan);
1350 mod_timer(&mdev->request_timer, jiffies + HZ);
1351 goto success;
1352
1353fail_unlock:
1354 mutex_unlock(&mdev->tconn->conf_update);
1355 fail:
1356 kfree(new_disk_conf);
1357 kfree(new_plan);
1358success:
1359 put_ldev(mdev);
1360 out:
1361 drbd_adm_finish(info, retcode);
1362 return 0;
1363}
1364
1365int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
1366{
1367 struct drbd_conf *mdev;
1368 int err;
1369 enum drbd_ret_code retcode;
1370 enum determine_dev_size dd;
1371 sector_t max_possible_sectors;
1372 sector_t min_md_device_sectors;
1373 struct drbd_backing_dev *nbc = NULL;
1374 struct disk_conf *new_disk_conf = NULL;
1375 struct block_device *bdev;
1376 struct lru_cache *resync_lru = NULL;
1377 struct fifo_buffer *new_plan = NULL;
1378 union drbd_state ns, os;
1379 enum drbd_state_rv rv;
1380 struct net_conf *nc;
1381
1382 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
1383 if (!adm_ctx.reply_skb)
1384 return retcode;
1385 if (retcode != NO_ERROR)
1386 goto finish;
1387
1388 mdev = adm_ctx.mdev;
1389 conn_reconfig_start(mdev->tconn);
1390
1391
1392 if (mdev->state.disk > D_DISKLESS) {
1393 retcode = ERR_DISK_CONFIGURED;
1394 goto fail;
1395 }
1396
1397
1398
1399
1400 wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt));
1401
1402
1403 clear_bit(FORCE_DETACH, &mdev->flags);
1404 clear_bit(WAS_IO_ERROR, &mdev->flags);
1405 clear_bit(WAS_READ_ERROR, &mdev->flags);
1406
1407
1408 mdev->rs_total = 0;
1409 mdev->rs_failed = 0;
1410 atomic_set(&mdev->rs_pending_cnt, 0);
1411
1412
1413 nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL);
1414 if (!nbc) {
1415 retcode = ERR_NOMEM;
1416 goto fail;
1417 }
1418 spin_lock_init(&nbc->md.uuid_lock);
1419
1420 new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL);
1421 if (!new_disk_conf) {
1422 retcode = ERR_NOMEM;
1423 goto fail;
1424 }
1425 nbc->disk_conf = new_disk_conf;
1426
1427 set_disk_conf_defaults(new_disk_conf);
1428 err = disk_conf_from_attrs(new_disk_conf, info);
1429 if (err) {
1430 retcode = ERR_MANDATORY_TAG;
1431 drbd_msg_put_info(from_attrs_err_to_txt(err));
1432 goto fail;
1433 }
1434
1435 if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
1436 new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
1437
1438 new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ);
1439 if (!new_plan) {
1440 retcode = ERR_NOMEM;
1441 goto fail;
1442 }
1443
1444 if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) {
1445 retcode = ERR_MD_IDX_INVALID;
1446 goto fail;
1447 }
1448
1449 write_lock_irq(&global_state_lock);
1450 retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after);
1451 write_unlock_irq(&global_state_lock);
1452 if (retcode != NO_ERROR)
1453 goto fail;
1454
1455 rcu_read_lock();
1456 nc = rcu_dereference(mdev->tconn->net_conf);
1457 if (nc) {
1458 if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) {
1459 rcu_read_unlock();
1460 retcode = ERR_STONITH_AND_PROT_A;
1461 goto fail;
1462 }
1463 }
1464 rcu_read_unlock();
1465
1466 bdev = blkdev_get_by_path(new_disk_conf->backing_dev,
1467 FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev);
1468 if (IS_ERR(bdev)) {
1469 dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev,
1470 PTR_ERR(bdev));
1471 retcode = ERR_OPEN_DISK;
1472 goto fail;
1473 }
1474 nbc->backing_bdev = bdev;
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484 bdev = blkdev_get_by_path(new_disk_conf->meta_dev,
1485 FMODE_READ | FMODE_WRITE | FMODE_EXCL,
1486 (new_disk_conf->meta_dev_idx < 0) ?
1487 (void *)mdev : (void *)drbd_m_holder);
1488 if (IS_ERR(bdev)) {
1489 dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev,
1490 PTR_ERR(bdev));
1491 retcode = ERR_OPEN_MD_DISK;
1492 goto fail;
1493 }
1494 nbc->md_bdev = bdev;
1495
1496 if ((nbc->backing_bdev == nbc->md_bdev) !=
1497 (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL ||
1498 new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) {
1499 retcode = ERR_MD_IDX_INVALID;
1500 goto fail;
1501 }
1502
1503 resync_lru = lc_create("resync", drbd_bm_ext_cache,
1504 1, 61, sizeof(struct bm_extent),
1505 offsetof(struct bm_extent, lce));
1506 if (!resync_lru) {
1507 retcode = ERR_NOMEM;
1508 goto fail;
1509 }
1510
1511
1512
1513 retcode = drbd_md_read(mdev, nbc);
1514 if (retcode != NO_ERROR)
1515 goto fail;
1516
1517 if (new_disk_conf->al_extents < DRBD_AL_EXTENTS_MIN)
1518 new_disk_conf->al_extents = DRBD_AL_EXTENTS_MIN;
1519 if (new_disk_conf->al_extents > drbd_al_extents_max(nbc))
1520 new_disk_conf->al_extents = drbd_al_extents_max(nbc);
1521
1522 if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) {
1523 dev_err(DEV, "max capacity %llu smaller than disk size %llu\n",
1524 (unsigned long long) drbd_get_max_capacity(nbc),
1525 (unsigned long long) new_disk_conf->disk_size);
1526 retcode = ERR_DISK_TOO_SMALL;
1527 goto fail;
1528 }
1529
1530 if (new_disk_conf->meta_dev_idx < 0) {
1531 max_possible_sectors = DRBD_MAX_SECTORS_FLEX;
1532
1533 min_md_device_sectors = (2<<10);
1534 } else {
1535 max_possible_sectors = DRBD_MAX_SECTORS;
1536 min_md_device_sectors = MD_128MB_SECT * (new_disk_conf->meta_dev_idx + 1);
1537 }
1538
1539 if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) {
1540 retcode = ERR_MD_DISK_TOO_SMALL;
1541 dev_warn(DEV, "refusing attach: md-device too small, "
1542 "at least %llu sectors needed for this meta-disk type\n",
1543 (unsigned long long) min_md_device_sectors);
1544 goto fail;
1545 }
1546
1547
1548
1549 if (drbd_get_max_capacity(nbc) <
1550 drbd_get_capacity(mdev->this_bdev)) {
1551 retcode = ERR_DISK_TOO_SMALL;
1552 goto fail;
1553 }
1554
1555 nbc->known_size = drbd_get_capacity(nbc->backing_bdev);
1556
1557 if (nbc->known_size > max_possible_sectors) {
1558 dev_warn(DEV, "==> truncating very big lower level device "
1559 "to currently maximum possible %llu sectors <==\n",
1560 (unsigned long long) max_possible_sectors);
1561 if (new_disk_conf->meta_dev_idx >= 0)
1562 dev_warn(DEV, "==>> using internal or flexible "
1563 "meta data may help <<==\n");
1564 }
1565
1566 drbd_suspend_io(mdev);
1567
1568
1569
1570
1571
1572
1573
1574 wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev));
1575
1576 drbd_flush_workqueue(mdev);
1577
1578 rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE);
1579 retcode = rv;
1580 drbd_resume_io(mdev);
1581 if (rv < SS_SUCCESS)
1582 goto fail;
1583
1584 if (!get_ldev_if_state(mdev, D_ATTACHING))
1585 goto force_diskless;
1586
1587 if (!mdev->bitmap) {
1588 if (drbd_bm_init(mdev)) {
1589 retcode = ERR_NOMEM;
1590 goto force_diskless_dec;
1591 }
1592 }
1593
1594 if (mdev->state.conn < C_CONNECTED &&
1595 mdev->state.role == R_PRIMARY &&
1596 (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
1597 dev_err(DEV, "Can only attach to data with current UUID=%016llX\n",
1598 (unsigned long long)mdev->ed_uuid);
1599 retcode = ERR_DATA_NOT_CURRENT;
1600 goto force_diskless_dec;
1601 }
1602
1603
1604 if (drbd_check_al_size(mdev, new_disk_conf)) {
1605 retcode = ERR_NOMEM;
1606 goto force_diskless_dec;
1607 }
1608
1609
1610 if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
1611 drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) {
1612 dev_warn(DEV, "refusing to truncate a consistent device\n");
1613 retcode = ERR_DISK_TOO_SMALL;
1614 goto force_diskless_dec;
1615 }
1616
1617
1618
1619 if (new_disk_conf->md_flushes)
1620 clear_bit(MD_NO_FUA, &mdev->flags);
1621 else
1622 set_bit(MD_NO_FUA, &mdev->flags);
1623
1624
1625
1626
1627
1628 D_ASSERT(mdev->ldev == NULL);
1629 mdev->ldev = nbc;
1630 mdev->resync = resync_lru;
1631 mdev->rs_plan_s = new_plan;
1632 nbc = NULL;
1633 resync_lru = NULL;
1634 new_disk_conf = NULL;
1635 new_plan = NULL;
1636
1637 drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush);
1638
1639 if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY))
1640 set_bit(CRASHED_PRIMARY, &mdev->flags);
1641 else
1642 clear_bit(CRASHED_PRIMARY, &mdev->flags);
1643
1644 if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
1645 !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod))
1646 set_bit(CRASHED_PRIMARY, &mdev->flags);
1647
1648 mdev->send_cnt = 0;
1649 mdev->recv_cnt = 0;
1650 mdev->read_cnt = 0;
1651 mdev->writ_cnt = 0;
1652
1653 drbd_reconsider_max_bio_size(mdev);
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669 clear_bit(USE_DEGR_WFC_T, &mdev->flags);
1670 if (mdev->state.role != R_PRIMARY &&
1671 drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
1672 !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND))
1673 set_bit(USE_DEGR_WFC_T, &mdev->flags);
1674
1675 dd = drbd_determine_dev_size(mdev, 0, NULL);
1676 if (dd <= DS_ERROR) {
1677 retcode = ERR_NOMEM_BITMAP;
1678 goto force_diskless_dec;
1679 } else if (dd == DS_GREW)
1680 set_bit(RESYNC_AFTER_NEG, &mdev->flags);
1681
1682 if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC) ||
1683 (test_bit(CRASHED_PRIMARY, &mdev->flags) &&
1684 drbd_md_test_flag(mdev->ldev, MDF_AL_DISABLED))) {
1685 dev_info(DEV, "Assuming that all blocks are out of sync "
1686 "(aka FullSync)\n");
1687 if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write,
1688 "set_n_write from attaching", BM_LOCKED_MASK)) {
1689 retcode = ERR_IO_MD_DISK;
1690 goto force_diskless_dec;
1691 }
1692 } else {
1693 if (drbd_bitmap_io(mdev, &drbd_bm_read,
1694 "read from attaching", BM_LOCKED_MASK)) {
1695 retcode = ERR_IO_MD_DISK;
1696 goto force_diskless_dec;
1697 }
1698 }
1699
1700 if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev))
1701 drbd_suspend_al(mdev);
1702
1703 spin_lock_irq(&mdev->tconn->req_lock);
1704 os = drbd_read_state(mdev);
1705 ns = os;
1706
1707
1708
1709
1710
1711 if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) {
1712 if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE))
1713 ns.disk = D_CONSISTENT;
1714 else
1715 ns.disk = D_OUTDATED;
1716 } else {
1717 ns.disk = D_INCONSISTENT;
1718 }
1719
1720 if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED))
1721 ns.pdsk = D_OUTDATED;
1722
1723 rcu_read_lock();
1724 if (ns.disk == D_CONSISTENT &&
1725 (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE))
1726 ns.disk = D_UP_TO_DATE;
1727
1728
1729
1730
1731
1732
1733 if (rcu_dereference(mdev->ldev->disk_conf)->al_updates)
1734 mdev->ldev->md.flags &= ~MDF_AL_DISABLED;
1735 else
1736 mdev->ldev->md.flags |= MDF_AL_DISABLED;
1737
1738 rcu_read_unlock();
1739
1740
1741
1742 if (mdev->state.conn == C_CONNECTED) {
1743 mdev->new_state_tmp.i = ns.i;
1744 ns.i = os.i;
1745 ns.disk = D_NEGOTIATING;
1746
1747
1748
1749
1750 kfree(mdev->p_uuid);
1751 mdev->p_uuid = NULL;
1752 }
1753
1754 rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
1755 spin_unlock_irq(&mdev->tconn->req_lock);
1756
1757 if (rv < SS_SUCCESS)
1758 goto force_diskless_dec;
1759
1760 mod_timer(&mdev->request_timer, jiffies + HZ);
1761
1762 if (mdev->state.role == R_PRIMARY)
1763 mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
1764 else
1765 mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
1766
1767 drbd_md_mark_dirty(mdev);
1768 drbd_md_sync(mdev);
1769
1770 kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
1771 put_ldev(mdev);
1772 conn_reconfig_done(mdev->tconn);
1773 drbd_adm_finish(info, retcode);
1774 return 0;
1775
1776 force_diskless_dec:
1777 put_ldev(mdev);
1778 force_diskless:
1779 drbd_force_state(mdev, NS(disk, D_DISKLESS));
1780 drbd_md_sync(mdev);
1781 fail:
1782 conn_reconfig_done(mdev->tconn);
1783 if (nbc) {
1784 if (nbc->backing_bdev)
1785 blkdev_put(nbc->backing_bdev,
1786 FMODE_READ | FMODE_WRITE | FMODE_EXCL);
1787 if (nbc->md_bdev)
1788 blkdev_put(nbc->md_bdev,
1789 FMODE_READ | FMODE_WRITE | FMODE_EXCL);
1790 kfree(nbc);
1791 }
1792 kfree(new_disk_conf);
1793 lc_destroy(resync_lru);
1794 kfree(new_plan);
1795
1796 finish:
1797 drbd_adm_finish(info, retcode);
1798 return 0;
1799}
1800
1801static int adm_detach(struct drbd_conf *mdev, int force)
1802{
1803 enum drbd_state_rv retcode;
1804 int ret;
1805
1806 if (force) {
1807 set_bit(FORCE_DETACH, &mdev->flags);
1808 drbd_force_state(mdev, NS(disk, D_FAILED));
1809 retcode = SS_SUCCESS;
1810 goto out;
1811 }
1812
1813 drbd_suspend_io(mdev);
1814 drbd_md_get_buffer(mdev);
1815 retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
1816 drbd_md_put_buffer(mdev);
1817
1818 ret = wait_event_interruptible(mdev->misc_wait,
1819 mdev->state.disk != D_FAILED);
1820 drbd_resume_io(mdev);
1821 if ((int)retcode == (int)SS_IS_DISKLESS)
1822 retcode = SS_NOTHING_TO_DO;
1823 if (ret)
1824 retcode = ERR_INTR;
1825out:
1826 return retcode;
1827}
1828
1829
1830
1831
1832
1833
1834int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info)
1835{
1836 enum drbd_ret_code retcode;
1837 struct detach_parms parms = { };
1838 int err;
1839
1840 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
1841 if (!adm_ctx.reply_skb)
1842 return retcode;
1843 if (retcode != NO_ERROR)
1844 goto out;
1845
1846 if (info->attrs[DRBD_NLA_DETACH_PARMS]) {
1847 err = detach_parms_from_attrs(&parms, info);
1848 if (err) {
1849 retcode = ERR_MANDATORY_TAG;
1850 drbd_msg_put_info(from_attrs_err_to_txt(err));
1851 goto out;
1852 }
1853 }
1854
1855 retcode = adm_detach(adm_ctx.mdev, parms.force_detach);
1856out:
1857 drbd_adm_finish(info, retcode);
1858 return 0;
1859}
1860
1861static bool conn_resync_running(struct drbd_tconn *tconn)
1862{
1863 struct drbd_conf *mdev;
1864 bool rv = false;
1865 int vnr;
1866
1867 rcu_read_lock();
1868 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
1869 if (mdev->state.conn == C_SYNC_SOURCE ||
1870 mdev->state.conn == C_SYNC_TARGET ||
1871 mdev->state.conn == C_PAUSED_SYNC_S ||
1872 mdev->state.conn == C_PAUSED_SYNC_T) {
1873 rv = true;
1874 break;
1875 }
1876 }
1877 rcu_read_unlock();
1878
1879 return rv;
1880}
1881
1882static bool conn_ov_running(struct drbd_tconn *tconn)
1883{
1884 struct drbd_conf *mdev;
1885 bool rv = false;
1886 int vnr;
1887
1888 rcu_read_lock();
1889 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
1890 if (mdev->state.conn == C_VERIFY_S ||
1891 mdev->state.conn == C_VERIFY_T) {
1892 rv = true;
1893 break;
1894 }
1895 }
1896 rcu_read_unlock();
1897
1898 return rv;
1899}
1900
1901static enum drbd_ret_code
1902_check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf)
1903{
1904 struct drbd_conf *mdev;
1905 int i;
1906
1907 if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) {
1908 if (new_conf->wire_protocol != old_conf->wire_protocol)
1909 return ERR_NEED_APV_100;
1910
1911 if (new_conf->two_primaries != old_conf->two_primaries)
1912 return ERR_NEED_APV_100;
1913
1914 if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg))
1915 return ERR_NEED_APV_100;
1916 }
1917
1918 if (!new_conf->two_primaries &&
1919 conn_highest_role(tconn) == R_PRIMARY &&
1920 conn_highest_peer(tconn) == R_PRIMARY)
1921 return ERR_NEED_ALLOW_TWO_PRI;
1922
1923 if (new_conf->two_primaries &&
1924 (new_conf->wire_protocol != DRBD_PROT_C))
1925 return ERR_NOT_PROTO_C;
1926
1927 idr_for_each_entry(&tconn->volumes, mdev, i) {
1928 if (get_ldev(mdev)) {
1929 enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing;
1930 put_ldev(mdev);
1931 if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH)
1932 return ERR_STONITH_AND_PROT_A;
1933 }
1934 if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data)
1935 return ERR_DISCARD_IMPOSSIBLE;
1936 }
1937
1938 if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A)
1939 return ERR_CONG_NOT_PROTO_A;
1940
1941 return NO_ERROR;
1942}
1943
1944static enum drbd_ret_code
1945check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
1946{
1947 static enum drbd_ret_code rv;
1948 struct drbd_conf *mdev;
1949 int i;
1950
1951 rcu_read_lock();
1952 rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf);
1953 rcu_read_unlock();
1954
1955
1956 idr_for_each_entry(&tconn->volumes, mdev, i) {
1957 if (!mdev->bitmap) {
1958 if(drbd_bm_init(mdev))
1959 return ERR_NOMEM;
1960 }
1961 }
1962
1963 return rv;
1964}
1965
1966struct crypto {
1967 struct crypto_hash *verify_tfm;
1968 struct crypto_hash *csums_tfm;
1969 struct crypto_hash *cram_hmac_tfm;
1970 struct crypto_hash *integrity_tfm;
1971};
1972
1973static int
1974alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg)
1975{
1976 if (!tfm_name[0])
1977 return NO_ERROR;
1978
1979 *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC);
1980 if (IS_ERR(*tfm)) {
1981 *tfm = NULL;
1982 return err_alg;
1983 }
1984
1985 return NO_ERROR;
1986}
1987
1988static enum drbd_ret_code
1989alloc_crypto(struct crypto *crypto, struct net_conf *new_conf)
1990{
1991 char hmac_name[CRYPTO_MAX_ALG_NAME];
1992 enum drbd_ret_code rv;
1993
1994 rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg,
1995 ERR_CSUMS_ALG);
1996 if (rv != NO_ERROR)
1997 return rv;
1998 rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg,
1999 ERR_VERIFY_ALG);
2000 if (rv != NO_ERROR)
2001 return rv;
2002 rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg,
2003 ERR_INTEGRITY_ALG);
2004 if (rv != NO_ERROR)
2005 return rv;
2006 if (new_conf->cram_hmac_alg[0] != 0) {
2007 snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
2008 new_conf->cram_hmac_alg);
2009
2010 rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name,
2011 ERR_AUTH_ALG);
2012 }
2013
2014 return rv;
2015}
2016
2017static void free_crypto(struct crypto *crypto)
2018{
2019 crypto_free_hash(crypto->cram_hmac_tfm);
2020 crypto_free_hash(crypto->integrity_tfm);
2021 crypto_free_hash(crypto->csums_tfm);
2022 crypto_free_hash(crypto->verify_tfm);
2023}
2024
2025int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
2026{
2027 enum drbd_ret_code retcode;
2028 struct drbd_tconn *tconn;
2029 struct net_conf *old_conf, *new_conf = NULL;
2030 int err;
2031 int ovr;
2032 int rsr;
2033 struct crypto crypto = { };
2034
2035 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION);
2036 if (!adm_ctx.reply_skb)
2037 return retcode;
2038 if (retcode != NO_ERROR)
2039 goto out;
2040
2041 tconn = adm_ctx.tconn;
2042
2043 new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
2044 if (!new_conf) {
2045 retcode = ERR_NOMEM;
2046 goto out;
2047 }
2048
2049 conn_reconfig_start(tconn);
2050
2051 mutex_lock(&tconn->data.mutex);
2052 mutex_lock(&tconn->conf_update);
2053 old_conf = tconn->net_conf;
2054
2055 if (!old_conf) {
2056 drbd_msg_put_info("net conf missing, try connect");
2057 retcode = ERR_INVALID_REQUEST;
2058 goto fail;
2059 }
2060
2061 *new_conf = *old_conf;
2062 if (should_set_defaults(info))
2063 set_net_conf_defaults(new_conf);
2064
2065 err = net_conf_from_attrs_for_change(new_conf, info);
2066 if (err && err != -ENOMSG) {
2067 retcode = ERR_MANDATORY_TAG;
2068 drbd_msg_put_info(from_attrs_err_to_txt(err));
2069 goto fail;
2070 }
2071
2072 retcode = check_net_options(tconn, new_conf);
2073 if (retcode != NO_ERROR)
2074 goto fail;
2075
2076
2077 rsr = conn_resync_running(tconn);
2078 if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) {
2079 retcode = ERR_CSUMS_RESYNC_RUNNING;
2080 goto fail;
2081 }
2082
2083
2084 ovr = conn_ov_running(tconn);
2085 if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) {
2086 retcode = ERR_VERIFY_RUNNING;
2087 goto fail;
2088 }
2089
2090 retcode = alloc_crypto(&crypto, new_conf);
2091 if (retcode != NO_ERROR)
2092 goto fail;
2093
2094 rcu_assign_pointer(tconn->net_conf, new_conf);
2095
2096 if (!rsr) {
2097 crypto_free_hash(tconn->csums_tfm);
2098 tconn->csums_tfm = crypto.csums_tfm;
2099 crypto.csums_tfm = NULL;
2100 }
2101 if (!ovr) {
2102 crypto_free_hash(tconn->verify_tfm);
2103 tconn->verify_tfm = crypto.verify_tfm;
2104 crypto.verify_tfm = NULL;
2105 }
2106
2107 crypto_free_hash(tconn->integrity_tfm);
2108 tconn->integrity_tfm = crypto.integrity_tfm;
2109 if (tconn->cstate >= C_WF_REPORT_PARAMS && tconn->agreed_pro_version >= 100)
2110
2111 __drbd_send_protocol(tconn, P_PROTOCOL_UPDATE);
2112
2113 crypto_free_hash(tconn->cram_hmac_tfm);
2114 tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
2115
2116 mutex_unlock(&tconn->conf_update);
2117 mutex_unlock(&tconn->data.mutex);
2118 synchronize_rcu();
2119 kfree(old_conf);
2120
2121 if (tconn->cstate >= C_WF_REPORT_PARAMS)
2122 drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn)));
2123
2124 goto done;
2125
2126 fail:
2127 mutex_unlock(&tconn->conf_update);
2128 mutex_unlock(&tconn->data.mutex);
2129 free_crypto(&crypto);
2130 kfree(new_conf);
2131 done:
2132 conn_reconfig_done(tconn);
2133 out:
2134 drbd_adm_finish(info, retcode);
2135 return 0;
2136}
2137
2138int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
2139{
2140 struct drbd_conf *mdev;
2141 struct net_conf *old_conf, *new_conf = NULL;
2142 struct crypto crypto = { };
2143 struct drbd_tconn *tconn;
2144 enum drbd_ret_code retcode;
2145 int i;
2146 int err;
2147
2148 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
2149
2150 if (!adm_ctx.reply_skb)
2151 return retcode;
2152 if (retcode != NO_ERROR)
2153 goto out;
2154 if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) {
2155 drbd_msg_put_info("connection endpoint(s) missing");
2156 retcode = ERR_INVALID_REQUEST;
2157 goto out;
2158 }
2159
2160
2161
2162
2163 list_for_each_entry(tconn, &drbd_tconns, all_tconn) {
2164 if (nla_len(adm_ctx.my_addr) == tconn->my_addr_len &&
2165 !memcmp(nla_data(adm_ctx.my_addr), &tconn->my_addr, tconn->my_addr_len)) {
2166 retcode = ERR_LOCAL_ADDR;
2167 goto out;
2168 }
2169
2170 if (nla_len(adm_ctx.peer_addr) == tconn->peer_addr_len &&
2171 !memcmp(nla_data(adm_ctx.peer_addr), &tconn->peer_addr, tconn->peer_addr_len)) {
2172 retcode = ERR_PEER_ADDR;
2173 goto out;
2174 }
2175 }
2176
2177 tconn = adm_ctx.tconn;
2178 conn_reconfig_start(tconn);
2179
2180 if (tconn->cstate > C_STANDALONE) {
2181 retcode = ERR_NET_CONFIGURED;
2182 goto fail;
2183 }
2184
2185
2186 new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL);
2187 if (!new_conf) {
2188 retcode = ERR_NOMEM;
2189 goto fail;
2190 }
2191
2192 set_net_conf_defaults(new_conf);
2193
2194 err = net_conf_from_attrs(new_conf, info);
2195 if (err && err != -ENOMSG) {
2196 retcode = ERR_MANDATORY_TAG;
2197 drbd_msg_put_info(from_attrs_err_to_txt(err));
2198 goto fail;
2199 }
2200
2201 retcode = check_net_options(tconn, new_conf);
2202 if (retcode != NO_ERROR)
2203 goto fail;
2204
2205 retcode = alloc_crypto(&crypto, new_conf);
2206 if (retcode != NO_ERROR)
2207 goto fail;
2208
2209 ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;
2210
2211 conn_flush_workqueue(tconn);
2212
2213 mutex_lock(&tconn->conf_update);
2214 old_conf = tconn->net_conf;
2215 if (old_conf) {
2216 retcode = ERR_NET_CONFIGURED;
2217 mutex_unlock(&tconn->conf_update);
2218 goto fail;
2219 }
2220 rcu_assign_pointer(tconn->net_conf, new_conf);
2221
2222 conn_free_crypto(tconn);
2223 tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
2224 tconn->integrity_tfm = crypto.integrity_tfm;
2225 tconn->csums_tfm = crypto.csums_tfm;
2226 tconn->verify_tfm = crypto.verify_tfm;
2227
2228 tconn->my_addr_len = nla_len(adm_ctx.my_addr);
2229 memcpy(&tconn->my_addr, nla_data(adm_ctx.my_addr), tconn->my_addr_len);
2230 tconn->peer_addr_len = nla_len(adm_ctx.peer_addr);
2231 memcpy(&tconn->peer_addr, nla_data(adm_ctx.peer_addr), tconn->peer_addr_len);
2232
2233 mutex_unlock(&tconn->conf_update);
2234
2235 rcu_read_lock();
2236 idr_for_each_entry(&tconn->volumes, mdev, i) {
2237 mdev->send_cnt = 0;
2238 mdev->recv_cnt = 0;
2239 }
2240 rcu_read_unlock();
2241
2242 retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE);
2243
2244 conn_reconfig_done(tconn);
2245 drbd_adm_finish(info, retcode);
2246 return 0;
2247
2248fail:
2249 free_crypto(&crypto);
2250 kfree(new_conf);
2251
2252 conn_reconfig_done(tconn);
2253out:
2254 drbd_adm_finish(info, retcode);
2255 return 0;
2256}
2257
2258static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force)
2259{
2260 enum drbd_state_rv rv;
2261
2262 rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING),
2263 force ? CS_HARD : 0);
2264
2265 switch (rv) {
2266 case SS_NOTHING_TO_DO:
2267 break;
2268 case SS_ALREADY_STANDALONE:
2269 return SS_SUCCESS;
2270 case SS_PRIMARY_NOP:
2271
2272 rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0);
2273
2274 if (rv == SS_OUTDATE_WO_CONN)
2275 rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_VERBOSE);
2276
2277 break;
2278 case SS_CW_FAILED_BY_PEER:
2279
2280 rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING,
2281 disk, D_OUTDATED), 0);
2282 if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) {
2283 rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING),
2284 CS_HARD);
2285 }
2286 break;
2287 default:;
2288
2289 }
2290
2291 if (rv >= SS_SUCCESS) {
2292 enum drbd_state_rv rv2;
2293
2294
2295
2296
2297 drbd_thread_stop(&adm_ctx.tconn->receiver);
2298
2299
2300
2301
2302
2303
2304
2305 rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE),
2306 CS_VERBOSE | CS_HARD);
2307 if (rv2 < SS_SUCCESS)
2308 conn_err(tconn,
2309 "unexpected rv2=%d in conn_try_disconnect()\n",
2310 rv2);
2311 }
2312 return rv;
2313}
2314
2315int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info)
2316{
2317 struct disconnect_parms parms;
2318 struct drbd_tconn *tconn;
2319 enum drbd_state_rv rv;
2320 enum drbd_ret_code retcode;
2321 int err;
2322
2323 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION);
2324 if (!adm_ctx.reply_skb)
2325 return retcode;
2326 if (retcode != NO_ERROR)
2327 goto fail;
2328
2329 tconn = adm_ctx.tconn;
2330 memset(&parms, 0, sizeof(parms));
2331 if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) {
2332 err = disconnect_parms_from_attrs(&parms, info);
2333 if (err) {
2334 retcode = ERR_MANDATORY_TAG;
2335 drbd_msg_put_info(from_attrs_err_to_txt(err));
2336 goto fail;
2337 }
2338 }
2339
2340 rv = conn_try_disconnect(tconn, parms.force_disconnect);
2341 if (rv < SS_SUCCESS)
2342 retcode = rv;
2343 else
2344 retcode = NO_ERROR;
2345 fail:
2346 drbd_adm_finish(info, retcode);
2347 return 0;
2348}
2349
2350void resync_after_online_grow(struct drbd_conf *mdev)
2351{
2352 int iass;
2353
2354 dev_info(DEV, "Resync of new storage after online grow\n");
2355 if (mdev->state.role != mdev->state.peer)
2356 iass = (mdev->state.role == R_PRIMARY);
2357 else
2358 iass = test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags);
2359
2360 if (iass)
2361 drbd_start_resync(mdev, C_SYNC_SOURCE);
2362 else
2363 _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE);
2364}
2365
2366int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info)
2367{
2368 struct disk_conf *old_disk_conf, *new_disk_conf = NULL;
2369 struct resize_parms rs;
2370 struct drbd_conf *mdev;
2371 enum drbd_ret_code retcode;
2372 enum determine_dev_size dd;
2373 bool change_al_layout = false;
2374 enum dds_flags ddsf;
2375 sector_t u_size;
2376 int err;
2377
2378 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2379 if (!adm_ctx.reply_skb)
2380 return retcode;
2381 if (retcode != NO_ERROR)
2382 goto fail;
2383
2384 mdev = adm_ctx.mdev;
2385 if (!get_ldev(mdev)) {
2386 retcode = ERR_NO_DISK;
2387 goto fail;
2388 }
2389
2390 memset(&rs, 0, sizeof(struct resize_parms));
2391 rs.al_stripes = mdev->ldev->md.al_stripes;
2392 rs.al_stripe_size = mdev->ldev->md.al_stripe_size_4k * 4;
2393 if (info->attrs[DRBD_NLA_RESIZE_PARMS]) {
2394 err = resize_parms_from_attrs(&rs, info);
2395 if (err) {
2396 retcode = ERR_MANDATORY_TAG;
2397 drbd_msg_put_info(from_attrs_err_to_txt(err));
2398 goto fail_ldev;
2399 }
2400 }
2401
2402 if (mdev->state.conn > C_CONNECTED) {
2403 retcode = ERR_RESIZE_RESYNC;
2404 goto fail_ldev;
2405 }
2406
2407 if (mdev->state.role == R_SECONDARY &&
2408 mdev->state.peer == R_SECONDARY) {
2409 retcode = ERR_NO_PRIMARY;
2410 goto fail_ldev;
2411 }
2412
2413 if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) {
2414 retcode = ERR_NEED_APV_93;
2415 goto fail_ldev;
2416 }
2417
2418 rcu_read_lock();
2419 u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size;
2420 rcu_read_unlock();
2421 if (u_size != (sector_t)rs.resize_size) {
2422 new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
2423 if (!new_disk_conf) {
2424 retcode = ERR_NOMEM;
2425 goto fail_ldev;
2426 }
2427 }
2428
2429 if (mdev->ldev->md.al_stripes != rs.al_stripes ||
2430 mdev->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) {
2431 u32 al_size_k = rs.al_stripes * rs.al_stripe_size;
2432
2433 if (al_size_k > (16 * 1024 * 1024)) {
2434 retcode = ERR_MD_LAYOUT_TOO_BIG;
2435 goto fail_ldev;
2436 }
2437
2438 if (al_size_k < MD_32kB_SECT/2) {
2439 retcode = ERR_MD_LAYOUT_TOO_SMALL;
2440 goto fail_ldev;
2441 }
2442
2443 if (mdev->state.conn != C_CONNECTED) {
2444 retcode = ERR_MD_LAYOUT_CONNECTED;
2445 goto fail_ldev;
2446 }
2447
2448 change_al_layout = true;
2449 }
2450
2451 if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev))
2452 mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev);
2453
2454 if (new_disk_conf) {
2455 mutex_lock(&mdev->tconn->conf_update);
2456 old_disk_conf = mdev->ldev->disk_conf;
2457 *new_disk_conf = *old_disk_conf;
2458 new_disk_conf->disk_size = (sector_t)rs.resize_size;
2459 rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
2460 mutex_unlock(&mdev->tconn->conf_update);
2461 synchronize_rcu();
2462 kfree(old_disk_conf);
2463 }
2464
2465 ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0);
2466 dd = drbd_determine_dev_size(mdev, ddsf, change_al_layout ? &rs : NULL);
2467 drbd_md_sync(mdev);
2468 put_ldev(mdev);
2469 if (dd == DS_ERROR) {
2470 retcode = ERR_NOMEM_BITMAP;
2471 goto fail;
2472 } else if (dd == DS_ERROR_SPACE_MD) {
2473 retcode = ERR_MD_LAYOUT_NO_FIT;
2474 goto fail;
2475 } else if (dd == DS_ERROR_SHRINK) {
2476 retcode = ERR_IMPLICIT_SHRINK;
2477 goto fail;
2478 }
2479
2480 if (mdev->state.conn == C_CONNECTED) {
2481 if (dd == DS_GREW)
2482 set_bit(RESIZE_PENDING, &mdev->flags);
2483
2484 drbd_send_uuids(mdev);
2485 drbd_send_sizes(mdev, 1, ddsf);
2486 }
2487
2488 fail:
2489 drbd_adm_finish(info, retcode);
2490 return 0;
2491
2492 fail_ldev:
2493 put_ldev(mdev);
2494 goto fail;
2495}
2496
2497int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
2498{
2499 enum drbd_ret_code retcode;
2500 struct drbd_tconn *tconn;
2501 struct res_opts res_opts;
2502 int err;
2503
2504 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
2505 if (!adm_ctx.reply_skb)
2506 return retcode;
2507 if (retcode != NO_ERROR)
2508 goto fail;
2509 tconn = adm_ctx.tconn;
2510
2511 res_opts = tconn->res_opts;
2512 if (should_set_defaults(info))
2513 set_res_opts_defaults(&res_opts);
2514
2515 err = res_opts_from_attrs(&res_opts, info);
2516 if (err && err != -ENOMSG) {
2517 retcode = ERR_MANDATORY_TAG;
2518 drbd_msg_put_info(from_attrs_err_to_txt(err));
2519 goto fail;
2520 }
2521
2522 err = set_resource_options(tconn, &res_opts);
2523 if (err) {
2524 retcode = ERR_INVALID_REQUEST;
2525 if (err == -ENOMEM)
2526 retcode = ERR_NOMEM;
2527 }
2528
2529fail:
2530 drbd_adm_finish(info, retcode);
2531 return 0;
2532}
2533
2534int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info)
2535{
2536 struct drbd_conf *mdev;
2537 int retcode;
2538
2539 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2540 if (!adm_ctx.reply_skb)
2541 return retcode;
2542 if (retcode != NO_ERROR)
2543 goto out;
2544
2545 mdev = adm_ctx.mdev;
2546
2547
2548
2549
2550 drbd_suspend_io(mdev);
2551 wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
2552 drbd_flush_workqueue(mdev);
2553
2554
2555
2556
2557
2558 if (mdev->state.conn == C_STANDALONE && mdev->state.role == R_SECONDARY) {
2559 retcode = drbd_request_state(mdev, NS(disk, D_INCONSISTENT));
2560 if (retcode >= SS_SUCCESS) {
2561 if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write,
2562 "set_n_write from invalidate", BM_LOCKED_MASK))
2563 retcode = ERR_IO_MD_DISK;
2564 }
2565 } else
2566 retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
2567 drbd_resume_io(mdev);
2568
2569out:
2570 drbd_adm_finish(info, retcode);
2571 return 0;
2572}
2573
2574static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info,
2575 union drbd_state mask, union drbd_state val)
2576{
2577 enum drbd_ret_code retcode;
2578
2579 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2580 if (!adm_ctx.reply_skb)
2581 return retcode;
2582 if (retcode != NO_ERROR)
2583 goto out;
2584
2585 retcode = drbd_request_state(adm_ctx.mdev, mask, val);
2586out:
2587 drbd_adm_finish(info, retcode);
2588 return 0;
2589}
2590
2591static int drbd_bmio_set_susp_al(struct drbd_conf *mdev)
2592{
2593 int rv;
2594
2595 rv = drbd_bmio_set_n_write(mdev);
2596 drbd_suspend_al(mdev);
2597 return rv;
2598}
2599
2600int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info)
2601{
2602 int retcode;
2603 struct drbd_conf *mdev;
2604
2605 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2606 if (!adm_ctx.reply_skb)
2607 return retcode;
2608 if (retcode != NO_ERROR)
2609 goto out;
2610
2611 mdev = adm_ctx.mdev;
2612
2613
2614
2615
2616 drbd_suspend_io(mdev);
2617 wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
2618 drbd_flush_workqueue(mdev);
2619
2620
2621
2622
2623
2624 if (mdev->state.conn == C_STANDALONE && mdev->state.role == R_PRIMARY) {
2625
2626
2627 retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT));
2628 if (retcode >= SS_SUCCESS) {
2629 if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al,
2630 "set_n_write from invalidate_peer",
2631 BM_LOCKED_SET_ALLOWED))
2632 retcode = ERR_IO_MD_DISK;
2633 }
2634 } else
2635 retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S));
2636 drbd_resume_io(mdev);
2637
2638out:
2639 drbd_adm_finish(info, retcode);
2640 return 0;
2641}
2642
2643int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info)
2644{
2645 enum drbd_ret_code retcode;
2646
2647 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2648 if (!adm_ctx.reply_skb)
2649 return retcode;
2650 if (retcode != NO_ERROR)
2651 goto out;
2652
2653 if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO)
2654 retcode = ERR_PAUSE_IS_SET;
2655out:
2656 drbd_adm_finish(info, retcode);
2657 return 0;
2658}
2659
2660int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info)
2661{
2662 union drbd_dev_state s;
2663 enum drbd_ret_code retcode;
2664
2665 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2666 if (!adm_ctx.reply_skb)
2667 return retcode;
2668 if (retcode != NO_ERROR)
2669 goto out;
2670
2671 if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
2672 s = adm_ctx.mdev->state;
2673 if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) {
2674 retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP :
2675 s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR;
2676 } else {
2677 retcode = ERR_PAUSE_IS_CLEAR;
2678 }
2679 }
2680
2681out:
2682 drbd_adm_finish(info, retcode);
2683 return 0;
2684}
2685
2686int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info)
2687{
2688 return drbd_adm_simple_request_state(skb, info, NS(susp, 1));
2689}
2690
2691int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info)
2692{
2693 struct drbd_conf *mdev;
2694 int retcode;
2695
2696 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2697 if (!adm_ctx.reply_skb)
2698 return retcode;
2699 if (retcode != NO_ERROR)
2700 goto out;
2701
2702 mdev = adm_ctx.mdev;
2703 if (test_bit(NEW_CUR_UUID, &mdev->flags)) {
2704 drbd_uuid_new_current(mdev);
2705 clear_bit(NEW_CUR_UUID, &mdev->flags);
2706 }
2707 drbd_suspend_io(mdev);
2708 retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0));
2709 if (retcode == SS_SUCCESS) {
2710 if (mdev->state.conn < C_CONNECTED)
2711 tl_clear(mdev->tconn);
2712 if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED)
2713 tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO);
2714 }
2715 drbd_resume_io(mdev);
2716
2717out:
2718 drbd_adm_finish(info, retcode);
2719 return 0;
2720}
2721
2722int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info)
2723{
2724 return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED));
2725}
2726
2727int nla_put_drbd_cfg_context(struct sk_buff *skb, struct drbd_tconn *tconn, unsigned vnr)
2728{
2729 struct nlattr *nla;
2730 nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT);
2731 if (!nla)
2732 goto nla_put_failure;
2733 if (vnr != VOLUME_UNSPECIFIED &&
2734 nla_put_u32(skb, T_ctx_volume, vnr))
2735 goto nla_put_failure;
2736 if (nla_put_string(skb, T_ctx_resource_name, tconn->name))
2737 goto nla_put_failure;
2738 if (tconn->my_addr_len &&
2739 nla_put(skb, T_ctx_my_addr, tconn->my_addr_len, &tconn->my_addr))
2740 goto nla_put_failure;
2741 if (tconn->peer_addr_len &&
2742 nla_put(skb, T_ctx_peer_addr, tconn->peer_addr_len, &tconn->peer_addr))
2743 goto nla_put_failure;
2744 nla_nest_end(skb, nla);
2745 return 0;
2746
2747nla_put_failure:
2748 if (nla)
2749 nla_nest_cancel(skb, nla);
2750 return -EMSGSIZE;
2751}
2752
2753int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
2754 const struct sib_info *sib)
2755{
2756 struct state_info *si = NULL;
2757 struct nlattr *nla;
2758 int got_ldev;
2759 int err = 0;
2760 int exclude_sensitive;
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773 exclude_sensitive = sib || !capable(CAP_SYS_ADMIN);
2774
2775 got_ldev = get_ldev(mdev);
2776
2777
2778
2779 if (nla_put_drbd_cfg_context(skb, mdev->tconn, mdev->vnr))
2780 goto nla_put_failure;
2781
2782 if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive))
2783 goto nla_put_failure;
2784
2785 rcu_read_lock();
2786 if (got_ldev) {
2787 struct disk_conf *disk_conf;
2788
2789 disk_conf = rcu_dereference(mdev->ldev->disk_conf);
2790 err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive);
2791 }
2792 if (!err) {
2793 struct net_conf *nc;
2794
2795 nc = rcu_dereference(mdev->tconn->net_conf);
2796 if (nc)
2797 err = net_conf_to_skb(skb, nc, exclude_sensitive);
2798 }
2799 rcu_read_unlock();
2800 if (err)
2801 goto nla_put_failure;
2802
2803 nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO);
2804 if (!nla)
2805 goto nla_put_failure;
2806 if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) ||
2807 nla_put_u32(skb, T_current_state, mdev->state.i) ||
2808 nla_put_u64(skb, T_ed_uuid, mdev->ed_uuid) ||
2809 nla_put_u64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)) ||
2810 nla_put_u64(skb, T_send_cnt, mdev->send_cnt) ||
2811 nla_put_u64(skb, T_recv_cnt, mdev->recv_cnt) ||
2812 nla_put_u64(skb, T_read_cnt, mdev->read_cnt) ||
2813 nla_put_u64(skb, T_writ_cnt, mdev->writ_cnt) ||
2814 nla_put_u64(skb, T_al_writ_cnt, mdev->al_writ_cnt) ||
2815 nla_put_u64(skb, T_bm_writ_cnt, mdev->bm_writ_cnt) ||
2816 nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&mdev->ap_bio_cnt)) ||
2817 nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&mdev->ap_pending_cnt)) ||
2818 nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&mdev->rs_pending_cnt)))
2819 goto nla_put_failure;
2820
2821 if (got_ldev) {
2822 int err;
2823
2824 spin_lock_irq(&mdev->ldev->md.uuid_lock);
2825 err = nla_put(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid);
2826 spin_unlock_irq(&mdev->ldev->md.uuid_lock);
2827
2828 if (err)
2829 goto nla_put_failure;
2830
2831 if (nla_put_u32(skb, T_disk_flags, mdev->ldev->md.flags) ||
2832 nla_put_u64(skb, T_bits_total, drbd_bm_bits(mdev)) ||
2833 nla_put_u64(skb, T_bits_oos, drbd_bm_total_weight(mdev)))
2834 goto nla_put_failure;
2835 if (C_SYNC_SOURCE <= mdev->state.conn &&
2836 C_PAUSED_SYNC_T >= mdev->state.conn) {
2837 if (nla_put_u64(skb, T_bits_rs_total, mdev->rs_total) ||
2838 nla_put_u64(skb, T_bits_rs_failed, mdev->rs_failed))
2839 goto nla_put_failure;
2840 }
2841 }
2842
2843 if (sib) {
2844 switch(sib->sib_reason) {
2845 case SIB_SYNC_PROGRESS:
2846 case SIB_GET_STATUS_REPLY:
2847 break;
2848 case SIB_STATE_CHANGE:
2849 if (nla_put_u32(skb, T_prev_state, sib->os.i) ||
2850 nla_put_u32(skb, T_new_state, sib->ns.i))
2851 goto nla_put_failure;
2852 break;
2853 case SIB_HELPER_POST:
2854 if (nla_put_u32(skb, T_helper_exit_code,
2855 sib->helper_exit_code))
2856 goto nla_put_failure;
2857
2858 case SIB_HELPER_PRE:
2859 if (nla_put_string(skb, T_helper, sib->helper_name))
2860 goto nla_put_failure;
2861 break;
2862 }
2863 }
2864 nla_nest_end(skb, nla);
2865
2866 if (0)
2867nla_put_failure:
2868 err = -EMSGSIZE;
2869 if (got_ldev)
2870 put_ldev(mdev);
2871 return err;
2872}
2873
2874int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info)
2875{
2876 enum drbd_ret_code retcode;
2877 int err;
2878
2879 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2880 if (!adm_ctx.reply_skb)
2881 return retcode;
2882 if (retcode != NO_ERROR)
2883 goto out;
2884
2885 err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL);
2886 if (err) {
2887 nlmsg_free(adm_ctx.reply_skb);
2888 return err;
2889 }
2890out:
2891 drbd_adm_finish(info, retcode);
2892 return 0;
2893}
2894
2895int get_one_status(struct sk_buff *skb, struct netlink_callback *cb)
2896{
2897 struct drbd_conf *mdev;
2898 struct drbd_genlmsghdr *dh;
2899 struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0];
2900 struct drbd_tconn *tconn = NULL;
2901 struct drbd_tconn *tmp;
2902 unsigned volume = cb->args[1];
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925 rcu_read_lock();
2926
2927 list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) {
2928 if (pos == NULL) {
2929
2930 pos = tmp;
2931 tconn = pos;
2932 break;
2933 }
2934 if (tmp == pos) {
2935 tconn = pos;
2936 break;
2937 }
2938 }
2939 if (tconn) {
2940next_tconn:
2941 mdev = idr_get_next(&tconn->volumes, &volume);
2942 if (!mdev) {
2943
2944
2945 pos = list_entry_rcu(tconn->all_tconn.next,
2946 struct drbd_tconn, all_tconn);
2947
2948 if (volume != 0) {
2949
2950
2951
2952 if (&pos->all_tconn == &drbd_tconns || cb->args[2])
2953 goto out;
2954 volume = 0;
2955 tconn = pos;
2956 goto next_tconn;
2957 }
2958 }
2959
2960 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
2961 cb->nlh->nlmsg_seq, &drbd_genl_family,
2962 NLM_F_MULTI, DRBD_ADM_GET_STATUS);
2963 if (!dh)
2964 goto out;
2965
2966 if (!mdev) {
2967
2968
2969
2970 struct net_conf *nc;
2971 dh->minor = -1U;
2972 dh->ret_code = NO_ERROR;
2973 if (nla_put_drbd_cfg_context(skb, tconn, VOLUME_UNSPECIFIED))
2974 goto cancel;
2975 nc = rcu_dereference(tconn->net_conf);
2976 if (nc && net_conf_to_skb(skb, nc, 1) != 0)
2977 goto cancel;
2978 goto done;
2979 }
2980
2981 D_ASSERT(mdev->vnr == volume);
2982 D_ASSERT(mdev->tconn == tconn);
2983
2984 dh->minor = mdev_to_minor(mdev);
2985 dh->ret_code = NO_ERROR;
2986
2987 if (nla_put_status_info(skb, mdev, NULL)) {
2988cancel:
2989 genlmsg_cancel(skb, dh);
2990 goto out;
2991 }
2992done:
2993 genlmsg_end(skb, dh);
2994 }
2995
2996out:
2997 rcu_read_unlock();
2998
2999 cb->args[0] = (long)pos;
3000 cb->args[1] = (pos == tconn) ? volume + 1 : 0;
3001
3002
3003
3004 return skb->len;
3005}
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb)
3018{
3019 const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ;
3020 struct nlattr *nla;
3021 const char *resource_name;
3022 struct drbd_tconn *tconn;
3023 int maxtype;
3024
3025
3026 if (cb->args[0]) {
3027
3028
3029 if (cb->args[2] && cb->args[2] != cb->args[0])
3030 return 0;
3031 goto dump;
3032 }
3033
3034
3035
3036 nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen),
3037 nlmsg_attrlen(cb->nlh, hdrlen),
3038 DRBD_NLA_CFG_CONTEXT);
3039
3040
3041 if (!nla)
3042 goto dump;
3043 maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1;
3044 nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name));
3045 if (IS_ERR(nla))
3046 return PTR_ERR(nla);
3047
3048 if (!nla)
3049 return -EINVAL;
3050 resource_name = nla_data(nla);
3051 tconn = conn_get_by_name(resource_name);
3052
3053 if (!tconn)
3054 return -ENODEV;
3055
3056 kref_put(&tconn->kref, &conn_destroy);
3057
3058
3059
3060 cb->args[0] = (long)tconn;
3061
3062 cb->args[2] = (long)tconn;
3063
3064dump:
3065 return get_one_status(skb, cb);
3066}
3067
3068int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info)
3069{
3070 enum drbd_ret_code retcode;
3071 struct timeout_parms tp;
3072 int err;
3073
3074 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
3075 if (!adm_ctx.reply_skb)
3076 return retcode;
3077 if (retcode != NO_ERROR)
3078 goto out;
3079
3080 tp.timeout_type =
3081 adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED :
3082 test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED :
3083 UT_DEFAULT;
3084
3085 err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp);
3086 if (err) {
3087 nlmsg_free(adm_ctx.reply_skb);
3088 return err;
3089 }
3090out:
3091 drbd_adm_finish(info, retcode);
3092 return 0;
3093}
3094
3095int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info)
3096{
3097 struct drbd_conf *mdev;
3098 enum drbd_ret_code retcode;
3099 struct start_ov_parms parms;
3100
3101 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
3102 if (!adm_ctx.reply_skb)
3103 return retcode;
3104 if (retcode != NO_ERROR)
3105 goto out;
3106
3107 mdev = adm_ctx.mdev;
3108
3109
3110 parms.ov_start_sector = mdev->ov_start_sector;
3111 parms.ov_stop_sector = ULLONG_MAX;
3112 if (info->attrs[DRBD_NLA_START_OV_PARMS]) {
3113 int err = start_ov_parms_from_attrs(&parms, info);
3114 if (err) {
3115 retcode = ERR_MANDATORY_TAG;
3116 drbd_msg_put_info(from_attrs_err_to_txt(err));
3117 goto out;
3118 }
3119 }
3120
3121 mdev->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1);
3122 mdev->ov_stop_sector = parms.ov_stop_sector;
3123
3124
3125
3126 drbd_suspend_io(mdev);
3127 wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
3128 retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S));
3129 drbd_resume_io(mdev);
3130out:
3131 drbd_adm_finish(info, retcode);
3132 return 0;
3133}
3134
3135
3136int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info)
3137{
3138 struct drbd_conf *mdev;
3139 enum drbd_ret_code retcode;
3140 int skip_initial_sync = 0;
3141 int err;
3142 struct new_c_uuid_parms args;
3143
3144 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
3145 if (!adm_ctx.reply_skb)
3146 return retcode;
3147 if (retcode != NO_ERROR)
3148 goto out_nolock;
3149
3150 mdev = adm_ctx.mdev;
3151 memset(&args, 0, sizeof(args));
3152 if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) {
3153 err = new_c_uuid_parms_from_attrs(&args, info);
3154 if (err) {
3155 retcode = ERR_MANDATORY_TAG;
3156 drbd_msg_put_info(from_attrs_err_to_txt(err));
3157 goto out_nolock;
3158 }
3159 }
3160
3161 mutex_lock(mdev->state_mutex);
3162
3163 if (!get_ldev(mdev)) {
3164 retcode = ERR_NO_DISK;
3165 goto out;
3166 }
3167
3168
3169 if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 &&
3170 mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) {
3171 dev_info(DEV, "Preparing to skip initial sync\n");
3172 skip_initial_sync = 1;
3173 } else if (mdev->state.conn != C_STANDALONE) {
3174 retcode = ERR_CONNECTED;
3175 goto out_dec;
3176 }
3177
3178 drbd_uuid_set(mdev, UI_BITMAP, 0);
3179 drbd_uuid_new_current(mdev);
3180
3181 if (args.clear_bm) {
3182 err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write,
3183 "clear_n_write from new_c_uuid", BM_LOCKED_MASK);
3184 if (err) {
3185 dev_err(DEV, "Writing bitmap failed with %d\n",err);
3186 retcode = ERR_IO_MD_DISK;
3187 }
3188 if (skip_initial_sync) {
3189 drbd_send_uuids_skip_initial_sync(mdev);
3190 _drbd_uuid_set(mdev, UI_BITMAP, 0);
3191 drbd_print_uuids(mdev, "cleared bitmap UUID");
3192 spin_lock_irq(&mdev->tconn->req_lock);
3193 _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
3194 CS_VERBOSE, NULL);
3195 spin_unlock_irq(&mdev->tconn->req_lock);
3196 }
3197 }
3198
3199 drbd_md_sync(mdev);
3200out_dec:
3201 put_ldev(mdev);
3202out:
3203 mutex_unlock(mdev->state_mutex);
3204out_nolock:
3205 drbd_adm_finish(info, retcode);
3206 return 0;
3207}
3208
3209static enum drbd_ret_code
3210drbd_check_resource_name(const char *name)
3211{
3212 if (!name || !name[0]) {
3213 drbd_msg_put_info("resource name missing");
3214 return ERR_MANDATORY_TAG;
3215 }
3216
3217
3218 if (strchr(name, '/')) {
3219 drbd_msg_put_info("invalid resource name");
3220 return ERR_INVALID_REQUEST;
3221 }
3222 return NO_ERROR;
3223}
3224
3225int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
3226{
3227 enum drbd_ret_code retcode;
3228 struct res_opts res_opts;
3229 int err;
3230
3231 retcode = drbd_adm_prepare(skb, info, 0);
3232 if (!adm_ctx.reply_skb)
3233 return retcode;
3234 if (retcode != NO_ERROR)
3235 goto out;
3236
3237 set_res_opts_defaults(&res_opts);
3238 err = res_opts_from_attrs(&res_opts, info);
3239 if (err && err != -ENOMSG) {
3240 retcode = ERR_MANDATORY_TAG;
3241 drbd_msg_put_info(from_attrs_err_to_txt(err));
3242 goto out;
3243 }
3244
3245 retcode = drbd_check_resource_name(adm_ctx.resource_name);
3246 if (retcode != NO_ERROR)
3247 goto out;
3248
3249 if (adm_ctx.tconn) {
3250 if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) {
3251 retcode = ERR_INVALID_REQUEST;
3252 drbd_msg_put_info("resource exists");
3253 }
3254
3255 goto out;
3256 }
3257
3258 if (!conn_create(adm_ctx.resource_name, &res_opts))
3259 retcode = ERR_NOMEM;
3260out:
3261 drbd_adm_finish(info, retcode);
3262 return 0;
3263}
3264
3265int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info)
3266{
3267 struct drbd_genlmsghdr *dh = info->userhdr;
3268 enum drbd_ret_code retcode;
3269
3270 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
3271 if (!adm_ctx.reply_skb)
3272 return retcode;
3273 if (retcode != NO_ERROR)
3274 goto out;
3275
3276 if (dh->minor > MINORMASK) {
3277 drbd_msg_put_info("requested minor out of range");
3278 retcode = ERR_INVALID_REQUEST;
3279 goto out;
3280 }
3281 if (adm_ctx.volume > DRBD_VOLUME_MAX) {
3282 drbd_msg_put_info("requested volume id out of range");
3283 retcode = ERR_INVALID_REQUEST;
3284 goto out;
3285 }
3286
3287
3288
3289 if (adm_ctx.mdev) {
3290 if (info->nlhdr->nlmsg_flags & NLM_F_EXCL)
3291 retcode = ERR_MINOR_EXISTS;
3292
3293 goto out;
3294 }
3295
3296 retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume);
3297out:
3298 drbd_adm_finish(info, retcode);
3299 return 0;
3300}
3301
3302static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev)
3303{
3304 if (mdev->state.disk == D_DISKLESS &&
3305
3306
3307
3308 mdev->state.role == R_SECONDARY) {
3309 _drbd_request_state(mdev, NS(conn, C_WF_REPORT_PARAMS),
3310 CS_VERBOSE + CS_WAIT_COMPLETE);
3311 idr_remove(&mdev->tconn->volumes, mdev->vnr);
3312 idr_remove(&minors, mdev_to_minor(mdev));
3313 destroy_workqueue(mdev->submit.wq);
3314 del_gendisk(mdev->vdisk);
3315 synchronize_rcu();
3316 kref_put(&mdev->kref, &drbd_minor_destroy);
3317 return NO_ERROR;
3318 } else
3319 return ERR_MINOR_CONFIGURED;
3320}
3321
3322int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info)
3323{
3324 enum drbd_ret_code retcode;
3325
3326 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
3327 if (!adm_ctx.reply_skb)
3328 return retcode;
3329 if (retcode != NO_ERROR)
3330 goto out;
3331
3332 retcode = adm_delete_minor(adm_ctx.mdev);
3333out:
3334 drbd_adm_finish(info, retcode);
3335 return 0;
3336}
3337
3338int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)
3339{
3340 int retcode;
3341 struct drbd_conf *mdev;
3342 unsigned i;
3343
3344 retcode = drbd_adm_prepare(skb, info, 0);
3345 if (!adm_ctx.reply_skb)
3346 return retcode;
3347 if (retcode != NO_ERROR)
3348 goto out;
3349
3350 if (!adm_ctx.tconn) {
3351 retcode = ERR_RES_NOT_KNOWN;
3352 goto out;
3353 }
3354
3355
3356 idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
3357 retcode = drbd_set_role(mdev, R_SECONDARY, 0);
3358 if (retcode < SS_SUCCESS) {
3359 drbd_msg_put_info("failed to demote");
3360 goto out;
3361 }
3362 }
3363
3364 retcode = conn_try_disconnect(adm_ctx.tconn, 0);
3365 if (retcode < SS_SUCCESS) {
3366 drbd_msg_put_info("failed to disconnect");
3367 goto out;
3368 }
3369
3370
3371 idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
3372 retcode = adm_detach(mdev, 0);
3373 if (retcode < SS_SUCCESS || retcode > NO_ERROR) {
3374 drbd_msg_put_info("failed to detach");
3375 goto out;
3376 }
3377 }
3378
3379
3380
3381
3382 drbd_thread_stop(&adm_ctx.tconn->worker);
3383
3384
3385
3386
3387 idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
3388 retcode = adm_delete_minor(mdev);
3389 if (retcode != NO_ERROR) {
3390
3391 drbd_msg_put_info("failed to delete volume");
3392 goto out;
3393 }
3394 }
3395
3396
3397 if (conn_lowest_minor(adm_ctx.tconn) < 0) {
3398 list_del_rcu(&adm_ctx.tconn->all_tconn);
3399 synchronize_rcu();
3400 kref_put(&adm_ctx.tconn->kref, &conn_destroy);
3401
3402 retcode = NO_ERROR;
3403 } else {
3404
3405 retcode = ERR_RES_IN_USE;
3406 drbd_msg_put_info("failed to delete connection");
3407 }
3408 goto out;
3409out:
3410 drbd_adm_finish(info, retcode);
3411 return 0;
3412}
3413
3414int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info)
3415{
3416 enum drbd_ret_code retcode;
3417
3418 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
3419 if (!adm_ctx.reply_skb)
3420 return retcode;
3421 if (retcode != NO_ERROR)
3422 goto out;
3423
3424 if (conn_lowest_minor(adm_ctx.tconn) < 0) {
3425 list_del_rcu(&adm_ctx.tconn->all_tconn);
3426 synchronize_rcu();
3427 kref_put(&adm_ctx.tconn->kref, &conn_destroy);
3428
3429 retcode = NO_ERROR;
3430 } else {
3431 retcode = ERR_RES_IN_USE;
3432 }
3433
3434 if (retcode == NO_ERROR)
3435 drbd_thread_stop(&adm_ctx.tconn->worker);
3436out:
3437 drbd_adm_finish(info, retcode);
3438 return 0;
3439}
3440
3441void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib)
3442{
3443 static atomic_t drbd_genl_seq = ATOMIC_INIT(2);
3444 struct sk_buff *msg;
3445 struct drbd_genlmsghdr *d_out;
3446 unsigned seq;
3447 int err = -ENOMEM;
3448
3449 if (sib->sib_reason == SIB_SYNC_PROGRESS) {
3450 if (time_after(jiffies, mdev->rs_last_bcast + HZ))
3451 mdev->rs_last_bcast = jiffies;
3452 else
3453 return;
3454 }
3455
3456 seq = atomic_inc_return(&drbd_genl_seq);
3457 msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
3458 if (!msg)
3459 goto failed;
3460
3461 err = -EMSGSIZE;
3462 d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT);
3463 if (!d_out)
3464 goto nla_put_failure;
3465 d_out->minor = mdev_to_minor(mdev);
3466 d_out->ret_code = NO_ERROR;
3467
3468 if (nla_put_status_info(msg, mdev, sib))
3469 goto nla_put_failure;
3470 genlmsg_end(msg, d_out);
3471 err = drbd_genl_multicast_events(msg, 0);
3472
3473 if (err && err != -ESRCH)
3474 goto failed;
3475
3476 return;
3477
3478nla_put_failure:
3479 nlmsg_free(msg);
3480failed:
3481 dev_err(DEV, "Error %d while broadcasting event. "
3482 "Event seq:%u sib_reason:%u\n",
3483 err, seq, sib->sib_reason);
3484}
3485