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26#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
28#include <linux/module.h>
29#include <linux/drbd.h>
30#include <linux/in.h>
31#include <linux/fs.h>
32#include <linux/file.h>
33#include <linux/slab.h>
34#include <linux/blkpg.h>
35#include <linux/cpumask.h>
36#include "drbd_int.h"
37#include "drbd_protocol.h"
38#include "drbd_req.h"
39#include "drbd_state_change.h"
40#include <asm/unaligned.h>
41#include <linux/drbd_limits.h>
42#include <linux/kthread.h>
43
44#include <net/genetlink.h>
45
46
47
48
49
50int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info);
51int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info);
52
53int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info);
54int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info);
55int drbd_adm_down(struct sk_buff *skb, struct genl_info *info);
56
57int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info);
58int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info);
59int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info);
60int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info);
61int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info);
62int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info);
63int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info);
64int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info);
65int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info);
66int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info);
67int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info);
68int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info);
69int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info);
70int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info);
71int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info);
72int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info);
73int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info);
74int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info);
75int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info);
76int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info);
77
78int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb);
79int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb);
80int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb);
81int drbd_adm_dump_devices_done(struct netlink_callback *cb);
82int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb);
83int drbd_adm_dump_connections_done(struct netlink_callback *cb);
84int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb);
85int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb);
86int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb);
87
88#include <linux/drbd_genl_api.h>
89#include "drbd_nla.h"
90#include <linux/genl_magic_func.h>
91
92static atomic_t drbd_genl_seq = ATOMIC_INIT(2);
93static atomic_t notify_genl_seq = ATOMIC_INIT(2);
94
95DEFINE_MUTEX(notification_mutex);
96
97
98static char *drbd_m_holder = "Hands off! this is DRBD's meta data device.";
99
100static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info)
101{
102 genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb))));
103 if (genlmsg_reply(skb, info))
104 pr_err("error sending genl reply\n");
105}
106
107
108
109static int drbd_msg_put_info(struct sk_buff *skb, const char *info)
110{
111 struct nlattr *nla;
112 int err = -EMSGSIZE;
113
114 if (!info || !info[0])
115 return 0;
116
117 nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY);
118 if (!nla)
119 return err;
120
121 err = nla_put_string(skb, T_info_text, info);
122 if (err) {
123 nla_nest_cancel(skb, nla);
124 return err;
125 } else
126 nla_nest_end(skb, nla);
127 return 0;
128}
129
130
131
132
133
134
135
136
137
138
139#define DRBD_ADM_NEED_MINOR 1
140#define DRBD_ADM_NEED_RESOURCE 2
141#define DRBD_ADM_NEED_CONNECTION 4
142static int drbd_adm_prepare(struct drbd_config_context *adm_ctx,
143 struct sk_buff *skb, struct genl_info *info, unsigned flags)
144{
145 struct drbd_genlmsghdr *d_in = info->userhdr;
146 const u8 cmd = info->genlhdr->cmd;
147 int err;
148
149 memset(adm_ctx, 0, sizeof(*adm_ctx));
150
151
152 if (cmd != DRBD_ADM_GET_STATUS && !capable(CAP_NET_ADMIN))
153 return -EPERM;
154
155 adm_ctx->reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
156 if (!adm_ctx->reply_skb) {
157 err = -ENOMEM;
158 goto fail;
159 }
160
161 adm_ctx->reply_dh = genlmsg_put_reply(adm_ctx->reply_skb,
162 info, &drbd_genl_family, 0, cmd);
163
164
165 if (!adm_ctx->reply_dh) {
166 err = -ENOMEM;
167 goto fail;
168 }
169
170 adm_ctx->reply_dh->minor = d_in->minor;
171 adm_ctx->reply_dh->ret_code = NO_ERROR;
172
173 adm_ctx->volume = VOLUME_UNSPECIFIED;
174 if (info->attrs[DRBD_NLA_CFG_CONTEXT]) {
175 struct nlattr *nla;
176
177 err = drbd_cfg_context_from_attrs(NULL, info);
178 if (err)
179 goto fail;
180
181
182
183 err = nla_put_nohdr(adm_ctx->reply_skb,
184 info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len,
185 info->attrs[DRBD_NLA_CFG_CONTEXT]);
186 if (err)
187 goto fail;
188
189
190 nla = nested_attr_tb[__nla_type(T_ctx_volume)];
191 if (nla)
192 adm_ctx->volume = nla_get_u32(nla);
193 nla = nested_attr_tb[__nla_type(T_ctx_resource_name)];
194 if (nla)
195 adm_ctx->resource_name = nla_data(nla);
196 adm_ctx->my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)];
197 adm_ctx->peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)];
198 if ((adm_ctx->my_addr &&
199 nla_len(adm_ctx->my_addr) > sizeof(adm_ctx->connection->my_addr)) ||
200 (adm_ctx->peer_addr &&
201 nla_len(adm_ctx->peer_addr) > sizeof(adm_ctx->connection->peer_addr))) {
202 err = -EINVAL;
203 goto fail;
204 }
205 }
206
207 adm_ctx->minor = d_in->minor;
208 adm_ctx->device = minor_to_device(d_in->minor);
209
210
211
212
213 if (adm_ctx->device)
214 kref_get(&adm_ctx->device->kref);
215
216 if (adm_ctx->resource_name) {
217 adm_ctx->resource = drbd_find_resource(adm_ctx->resource_name);
218 }
219
220 if (!adm_ctx->device && (flags & DRBD_ADM_NEED_MINOR)) {
221 drbd_msg_put_info(adm_ctx->reply_skb, "unknown minor");
222 return ERR_MINOR_INVALID;
223 }
224 if (!adm_ctx->resource && (flags & DRBD_ADM_NEED_RESOURCE)) {
225 drbd_msg_put_info(adm_ctx->reply_skb, "unknown resource");
226 if (adm_ctx->resource_name)
227 return ERR_RES_NOT_KNOWN;
228 return ERR_INVALID_REQUEST;
229 }
230
231 if (flags & DRBD_ADM_NEED_CONNECTION) {
232 if (adm_ctx->resource) {
233 drbd_msg_put_info(adm_ctx->reply_skb, "no resource name expected");
234 return ERR_INVALID_REQUEST;
235 }
236 if (adm_ctx->device) {
237 drbd_msg_put_info(adm_ctx->reply_skb, "no minor number expected");
238 return ERR_INVALID_REQUEST;
239 }
240 if (adm_ctx->my_addr && adm_ctx->peer_addr)
241 adm_ctx->connection = conn_get_by_addrs(nla_data(adm_ctx->my_addr),
242 nla_len(adm_ctx->my_addr),
243 nla_data(adm_ctx->peer_addr),
244 nla_len(adm_ctx->peer_addr));
245 if (!adm_ctx->connection) {
246 drbd_msg_put_info(adm_ctx->reply_skb, "unknown connection");
247 return ERR_INVALID_REQUEST;
248 }
249 }
250
251
252 if (adm_ctx->device && adm_ctx->resource &&
253 adm_ctx->device->resource != adm_ctx->resource) {
254 pr_warning("request: minor=%u, resource=%s; but that minor belongs to resource %s\n",
255 adm_ctx->minor, adm_ctx->resource->name,
256 adm_ctx->device->resource->name);
257 drbd_msg_put_info(adm_ctx->reply_skb, "minor exists in different resource");
258 return ERR_INVALID_REQUEST;
259 }
260 if (adm_ctx->device &&
261 adm_ctx->volume != VOLUME_UNSPECIFIED &&
262 adm_ctx->volume != adm_ctx->device->vnr) {
263 pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
264 adm_ctx->minor, adm_ctx->volume,
265 adm_ctx->device->vnr,
266 adm_ctx->device->resource->name);
267 drbd_msg_put_info(adm_ctx->reply_skb, "minor exists as different volume");
268 return ERR_INVALID_REQUEST;
269 }
270
271
272 if (!adm_ctx->resource) {
273 adm_ctx->resource = adm_ctx->device ? adm_ctx->device->resource
274 : adm_ctx->connection ? adm_ctx->connection->resource : NULL;
275 if (adm_ctx->resource)
276 kref_get(&adm_ctx->resource->kref);
277 }
278
279 return NO_ERROR;
280
281fail:
282 nlmsg_free(adm_ctx->reply_skb);
283 adm_ctx->reply_skb = NULL;
284 return err;
285}
286
287static int drbd_adm_finish(struct drbd_config_context *adm_ctx,
288 struct genl_info *info, int retcode)
289{
290 if (adm_ctx->device) {
291 kref_put(&adm_ctx->device->kref, drbd_destroy_device);
292 adm_ctx->device = NULL;
293 }
294 if (adm_ctx->connection) {
295 kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection);
296 adm_ctx->connection = NULL;
297 }
298 if (adm_ctx->resource) {
299 kref_put(&adm_ctx->resource->kref, drbd_destroy_resource);
300 adm_ctx->resource = NULL;
301 }
302
303 if (!adm_ctx->reply_skb)
304 return -ENOMEM;
305
306 adm_ctx->reply_dh->ret_code = retcode;
307 drbd_adm_send_reply(adm_ctx->reply_skb, info);
308 return 0;
309}
310
311static void setup_khelper_env(struct drbd_connection *connection, char **envp)
312{
313 char *afs;
314
315
316 if (connection->my_addr_len == 0 || connection->peer_addr_len == 0)
317 return;
318
319 switch (((struct sockaddr *)&connection->peer_addr)->sa_family) {
320 case AF_INET6:
321 afs = "ipv6";
322 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6",
323 &((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr);
324 break;
325 case AF_INET:
326 afs = "ipv4";
327 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
328 &((struct sockaddr_in *)&connection->peer_addr)->sin_addr);
329 break;
330 default:
331 afs = "ssocks";
332 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
333 &((struct sockaddr_in *)&connection->peer_addr)->sin_addr);
334 }
335 snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs);
336}
337
338int drbd_khelper(struct drbd_device *device, char *cmd)
339{
340 char *envp[] = { "HOME=/",
341 "TERM=linux",
342 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
343 (char[20]) { },
344 (char[60]) { },
345 NULL };
346 char mb[14];
347 char *argv[] = {usermode_helper, cmd, mb, NULL };
348 struct drbd_connection *connection = first_peer_device(device)->connection;
349 struct sib_info sib;
350 int ret;
351
352 if (current == connection->worker.task)
353 set_bit(CALLBACK_PENDING, &connection->flags);
354
355 snprintf(mb, 14, "minor-%d", device_to_minor(device));
356 setup_khelper_env(connection, envp);
357
358
359
360 drbd_md_sync(device);
361
362 drbd_info(device, "helper command: %s %s %s\n", usermode_helper, cmd, mb);
363 sib.sib_reason = SIB_HELPER_PRE;
364 sib.helper_name = cmd;
365 drbd_bcast_event(device, &sib);
366 notify_helper(NOTIFY_CALL, device, connection, cmd, 0);
367 ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC);
368 if (ret)
369 drbd_warn(device, "helper command: %s %s %s exit code %u (0x%x)\n",
370 usermode_helper, cmd, mb,
371 (ret >> 8) & 0xff, ret);
372 else
373 drbd_info(device, "helper command: %s %s %s exit code %u (0x%x)\n",
374 usermode_helper, cmd, mb,
375 (ret >> 8) & 0xff, ret);
376 sib.sib_reason = SIB_HELPER_POST;
377 sib.helper_exit_code = ret;
378 drbd_bcast_event(device, &sib);
379 notify_helper(NOTIFY_RESPONSE, device, connection, cmd, ret);
380
381 if (current == connection->worker.task)
382 clear_bit(CALLBACK_PENDING, &connection->flags);
383
384 if (ret < 0)
385 ret = 0;
386
387 return ret;
388}
389
390enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd)
391{
392 char *envp[] = { "HOME=/",
393 "TERM=linux",
394 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
395 (char[20]) { },
396 (char[60]) { },
397 NULL };
398 char *resource_name = connection->resource->name;
399 char *argv[] = {usermode_helper, cmd, resource_name, NULL };
400 int ret;
401
402 setup_khelper_env(connection, envp);
403 conn_md_sync(connection);
404
405 drbd_info(connection, "helper command: %s %s %s\n", usermode_helper, cmd, resource_name);
406
407 notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0);
408
409 ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC);
410 if (ret)
411 drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n",
412 usermode_helper, cmd, resource_name,
413 (ret >> 8) & 0xff, ret);
414 else
415 drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n",
416 usermode_helper, cmd, resource_name,
417 (ret >> 8) & 0xff, ret);
418
419 notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret);
420
421 if (ret < 0)
422 ret = 0;
423
424 return ret;
425}
426
427static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection)
428{
429 enum drbd_fencing_p fp = FP_NOT_AVAIL;
430 struct drbd_peer_device *peer_device;
431 int vnr;
432
433 rcu_read_lock();
434 idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
435 struct drbd_device *device = peer_device->device;
436 if (get_ldev_if_state(device, D_CONSISTENT)) {
437 struct disk_conf *disk_conf =
438 rcu_dereference(peer_device->device->ldev->disk_conf);
439 fp = max_t(enum drbd_fencing_p, fp, disk_conf->fencing);
440 put_ldev(device);
441 }
442 }
443 rcu_read_unlock();
444
445 return fp;
446}
447
448static bool resource_is_supended(struct drbd_resource *resource)
449{
450 return resource->susp || resource->susp_fen || resource->susp_nod;
451}
452
453bool conn_try_outdate_peer(struct drbd_connection *connection)
454{
455 struct drbd_resource * const resource = connection->resource;
456 unsigned int connect_cnt;
457 union drbd_state mask = { };
458 union drbd_state val = { };
459 enum drbd_fencing_p fp;
460 char *ex_to_string;
461 int r;
462
463 spin_lock_irq(&resource->req_lock);
464 if (connection->cstate >= C_WF_REPORT_PARAMS) {
465 drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n");
466 spin_unlock_irq(&resource->req_lock);
467 return false;
468 }
469
470 connect_cnt = connection->connect_cnt;
471 spin_unlock_irq(&resource->req_lock);
472
473 fp = highest_fencing_policy(connection);
474 switch (fp) {
475 case FP_NOT_AVAIL:
476 drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n");
477 spin_lock_irq(&resource->req_lock);
478 if (connection->cstate < C_WF_REPORT_PARAMS) {
479 _conn_request_state(connection,
480 (union drbd_state) { { .susp_fen = 1 } },
481 (union drbd_state) { { .susp_fen = 0 } },
482 CS_VERBOSE | CS_HARD | CS_DC_SUSP);
483
484
485
486 if (!resource_is_supended(resource))
487 _tl_restart(connection, CONNECTION_LOST_WHILE_PENDING);
488 }
489
490
491
492
493
494
495 spin_unlock_irq(&resource->req_lock);
496 return false;
497
498 case FP_DONT_CARE:
499 return true;
500 default: ;
501 }
502
503 r = conn_khelper(connection, "fence-peer");
504
505 switch ((r>>8) & 0xff) {
506 case P_INCONSISTENT:
507 ex_to_string = "peer is inconsistent or worse";
508 mask.pdsk = D_MASK;
509 val.pdsk = D_INCONSISTENT;
510 break;
511 case P_OUTDATED:
512 ex_to_string = "peer was fenced";
513 mask.pdsk = D_MASK;
514 val.pdsk = D_OUTDATED;
515 break;
516 case P_DOWN:
517 if (conn_highest_disk(connection) == D_UP_TO_DATE) {
518
519 ex_to_string = "peer is unreachable, assumed to be dead";
520 mask.pdsk = D_MASK;
521 val.pdsk = D_OUTDATED;
522 } else {
523 ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
524 }
525 break;
526 case P_PRIMARY:
527
528
529 ex_to_string = "peer is active";
530 drbd_warn(connection, "Peer is primary, outdating myself.\n");
531 mask.disk = D_MASK;
532 val.disk = D_OUTDATED;
533 break;
534 case P_FENCING:
535
536
537 if (fp != FP_STONITH)
538 drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n");
539 ex_to_string = "peer was stonithed";
540 mask.pdsk = D_MASK;
541 val.pdsk = D_OUTDATED;
542 break;
543 default:
544
545 drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);
546 return false;
547 }
548
549 drbd_info(connection, "fence-peer helper returned %d (%s)\n",
550 (r>>8) & 0xff, ex_to_string);
551
552
553
554
555
556 spin_lock_irq(&resource->req_lock);
557 if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) {
558 if (connection->connect_cnt != connect_cnt)
559
560
561 drbd_info(connection, "Ignoring fence-peer exit code\n");
562 else
563 _conn_request_state(connection, mask, val, CS_VERBOSE);
564 }
565 spin_unlock_irq(&resource->req_lock);
566
567 return conn_highest_pdsk(connection) <= D_OUTDATED;
568}
569
570static int _try_outdate_peer_async(void *data)
571{
572 struct drbd_connection *connection = (struct drbd_connection *)data;
573
574 conn_try_outdate_peer(connection);
575
576 kref_put(&connection->kref, drbd_destroy_connection);
577 return 0;
578}
579
580void conn_try_outdate_peer_async(struct drbd_connection *connection)
581{
582 struct task_struct *opa;
583
584 kref_get(&connection->kref);
585
586
587
588
589
590 flush_signals(current);
591 opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h");
592 if (IS_ERR(opa)) {
593 drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n");
594 kref_put(&connection->kref, drbd_destroy_connection);
595 }
596}
597
598enum drbd_state_rv
599drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int force)
600{
601 struct drbd_peer_device *const peer_device = first_peer_device(device);
602 struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
603 const int max_tries = 4;
604 enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
605 struct net_conf *nc;
606 int try = 0;
607 int forced = 0;
608 union drbd_state mask, val;
609
610 if (new_role == R_PRIMARY) {
611 struct drbd_connection *connection;
612
613
614
615 rcu_read_lock();
616 for_each_connection(connection, device->resource)
617 request_ping(connection);
618 rcu_read_unlock();
619 }
620
621 mutex_lock(device->state_mutex);
622
623 mask.i = 0; mask.role = R_MASK;
624 val.i = 0; val.role = new_role;
625
626 while (try++ < max_tries) {
627 rv = _drbd_request_state_holding_state_mutex(device, mask, val, CS_WAIT_COMPLETE);
628
629
630
631 if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
632 val.pdsk = 0;
633 mask.pdsk = 0;
634 continue;
635 }
636
637 if (rv == SS_NO_UP_TO_DATE_DISK && force &&
638 (device->state.disk < D_UP_TO_DATE &&
639 device->state.disk >= D_INCONSISTENT)) {
640 mask.disk = D_MASK;
641 val.disk = D_UP_TO_DATE;
642 forced = 1;
643 continue;
644 }
645
646 if (rv == SS_NO_UP_TO_DATE_DISK &&
647 device->state.disk == D_CONSISTENT && mask.pdsk == 0) {
648 D_ASSERT(device, device->state.pdsk == D_UNKNOWN);
649
650 if (conn_try_outdate_peer(connection)) {
651 val.disk = D_UP_TO_DATE;
652 mask.disk = D_MASK;
653 }
654 continue;
655 }
656
657 if (rv == SS_NOTHING_TO_DO)
658 goto out;
659 if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
660 if (!conn_try_outdate_peer(connection) && force) {
661 drbd_warn(device, "Forced into split brain situation!\n");
662 mask.pdsk = D_MASK;
663 val.pdsk = D_OUTDATED;
664
665 }
666 continue;
667 }
668 if (rv == SS_TWO_PRIMARIES) {
669
670
671 int timeo;
672 rcu_read_lock();
673 nc = rcu_dereference(connection->net_conf);
674 timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
675 rcu_read_unlock();
676 schedule_timeout_interruptible(timeo);
677 if (try < max_tries)
678 try = max_tries - 1;
679 continue;
680 }
681 if (rv < SS_SUCCESS) {
682 rv = _drbd_request_state(device, mask, val,
683 CS_VERBOSE + CS_WAIT_COMPLETE);
684 if (rv < SS_SUCCESS)
685 goto out;
686 }
687 break;
688 }
689
690 if (rv < SS_SUCCESS)
691 goto out;
692
693 if (forced)
694 drbd_warn(device, "Forced to consider local data as UpToDate!\n");
695
696
697 wait_event(device->misc_wait, atomic_read(&device->ap_pending_cnt) == 0);
698
699
700
701 if (new_role == R_SECONDARY) {
702 if (get_ldev(device)) {
703 device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
704 put_ldev(device);
705 }
706 } else {
707 mutex_lock(&device->resource->conf_update);
708 nc = connection->net_conf;
709 if (nc)
710 nc->discard_my_data = 0;
711 mutex_unlock(&device->resource->conf_update);
712
713 if (get_ldev(device)) {
714 if (((device->state.conn < C_CONNECTED ||
715 device->state.pdsk <= D_FAILED)
716 && device->ldev->md.uuid[UI_BITMAP] == 0) || forced)
717 drbd_uuid_new_current(device);
718
719 device->ldev->md.uuid[UI_CURRENT] |= (u64)1;
720 put_ldev(device);
721 }
722 }
723
724
725
726
727 if (device->state.conn >= C_WF_REPORT_PARAMS) {
728
729 if (forced)
730 drbd_send_uuids(peer_device);
731 drbd_send_current_state(peer_device);
732 }
733
734 drbd_md_sync(device);
735 set_disk_ro(device->vdisk, new_role == R_SECONDARY);
736 kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE);
737out:
738 mutex_unlock(device->state_mutex);
739 return rv;
740}
741
742static const char *from_attrs_err_to_txt(int err)
743{
744 return err == -ENOMSG ? "required attribute missing" :
745 err == -EOPNOTSUPP ? "unknown mandatory attribute" :
746 err == -EEXIST ? "can not change invariant setting" :
747 "invalid attribute value";
748}
749
750int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info)
751{
752 struct drbd_config_context adm_ctx;
753 struct set_role_parms parms;
754 int err;
755 enum drbd_ret_code retcode;
756
757 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
758 if (!adm_ctx.reply_skb)
759 return retcode;
760 if (retcode != NO_ERROR)
761 goto out;
762
763 memset(&parms, 0, sizeof(parms));
764 if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) {
765 err = set_role_parms_from_attrs(&parms, info);
766 if (err) {
767 retcode = ERR_MANDATORY_TAG;
768 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
769 goto out;
770 }
771 }
772 genl_unlock();
773 mutex_lock(&adm_ctx.resource->adm_mutex);
774
775 if (info->genlhdr->cmd == DRBD_ADM_PRIMARY)
776 retcode = drbd_set_role(adm_ctx.device, R_PRIMARY, parms.assume_uptodate);
777 else
778 retcode = drbd_set_role(adm_ctx.device, R_SECONDARY, 0);
779
780 mutex_unlock(&adm_ctx.resource->adm_mutex);
781 genl_lock();
782out:
783 drbd_adm_finish(&adm_ctx, info, retcode);
784 return 0;
785}
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808static void drbd_md_set_sector_offsets(struct drbd_device *device,
809 struct drbd_backing_dev *bdev)
810{
811 sector_t md_size_sect = 0;
812 unsigned int al_size_sect = bdev->md.al_size_4k * 8;
813
814 bdev->md.md_offset = drbd_md_ss(bdev);
815
816 switch (bdev->md.meta_dev_idx) {
817 default:
818
819 bdev->md.md_size_sect = MD_128MB_SECT;
820 bdev->md.al_offset = MD_4kB_SECT;
821 bdev->md.bm_offset = MD_4kB_SECT + al_size_sect;
822 break;
823 case DRBD_MD_INDEX_FLEX_EXT:
824
825 bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev);
826 bdev->md.al_offset = MD_4kB_SECT;
827 bdev->md.bm_offset = MD_4kB_SECT + al_size_sect;
828 break;
829 case DRBD_MD_INDEX_INTERNAL:
830 case DRBD_MD_INDEX_FLEX_INT:
831
832 bdev->md.al_offset = -al_size_sect;
833
834 md_size_sect = drbd_get_capacity(bdev->backing_bdev);
835 md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT);
836 md_size_sect = BM_SECT_TO_EXT(md_size_sect);
837 md_size_sect = ALIGN(md_size_sect, 8);
838
839
840
841 md_size_sect += MD_4kB_SECT + al_size_sect;
842
843 bdev->md.md_size_sect = md_size_sect;
844
845 bdev->md.bm_offset = -md_size_sect + MD_4kB_SECT;
846 break;
847 }
848}
849
850
851char *ppsize(char *buf, unsigned long long size)
852{
853
854
855 static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
856 int base = 0;
857 while (size >= 10000 && base < sizeof(units)-1) {
858
859 size = (size >> 10) + !!(size & (1<<9));
860 base++;
861 }
862 sprintf(buf, "%u %cB", (unsigned)size, units[base]);
863
864 return buf;
865}
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888void drbd_suspend_io(struct drbd_device *device)
889{
890 atomic_inc(&device->suspend_cnt);
891 if (drbd_suspended(device))
892 return;
893 wait_event(device->misc_wait, !atomic_read(&device->ap_bio_cnt));
894}
895
896void drbd_resume_io(struct drbd_device *device)
897{
898 if (atomic_dec_and_test(&device->suspend_cnt))
899 wake_up(&device->misc_wait);
900}
901
902
903
904
905
906
907
908
909enum determine_dev_size
910drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct resize_parms *rs) __must_hold(local)
911{
912 struct md_offsets_and_sizes {
913 u64 last_agreed_sect;
914 u64 md_offset;
915 s32 al_offset;
916 s32 bm_offset;
917 u32 md_size_sect;
918
919 u32 al_stripes;
920 u32 al_stripe_size_4k;
921 } prev;
922 sector_t u_size, size;
923 struct drbd_md *md = &device->ldev->md;
924 char ppb[10];
925 void *buffer;
926
927 int md_moved, la_size_changed;
928 enum determine_dev_size rv = DS_UNCHANGED;
929
930
931
932
933
934
935
936
937
938 drbd_suspend_io(device);
939 buffer = drbd_md_get_buffer(device, __func__);
940 if (!buffer) {
941 drbd_resume_io(device);
942 return DS_ERROR;
943 }
944
945
946 prev.last_agreed_sect = md->la_size_sect;
947 prev.md_offset = md->md_offset;
948 prev.al_offset = md->al_offset;
949 prev.bm_offset = md->bm_offset;
950 prev.md_size_sect = md->md_size_sect;
951 prev.al_stripes = md->al_stripes;
952 prev.al_stripe_size_4k = md->al_stripe_size_4k;
953
954 if (rs) {
955
956 md->al_stripes = rs->al_stripes;
957 md->al_stripe_size_4k = rs->al_stripe_size / 4;
958 md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4;
959 }
960
961 drbd_md_set_sector_offsets(device, device->ldev);
962
963 rcu_read_lock();
964 u_size = rcu_dereference(device->ldev->disk_conf)->disk_size;
965 rcu_read_unlock();
966 size = drbd_new_dev_size(device, device->ldev, u_size, flags & DDSF_FORCED);
967
968 if (size < prev.last_agreed_sect) {
969 if (rs && u_size == 0) {
970
971
972 drbd_warn(device, "Implicit shrink not allowed. "
973 "Use --size=%llus for explicit shrink.\n",
974 (unsigned long long)size);
975 rv = DS_ERROR_SHRINK;
976 }
977 if (u_size > size)
978 rv = DS_ERROR_SPACE_MD;
979 if (rv != DS_UNCHANGED)
980 goto err_out;
981 }
982
983 if (drbd_get_capacity(device->this_bdev) != size ||
984 drbd_bm_capacity(device) != size) {
985 int err;
986 err = drbd_bm_resize(device, size, !(flags & DDSF_NO_RESYNC));
987 if (unlikely(err)) {
988
989 size = drbd_bm_capacity(device);
990 if (size == 0) {
991 drbd_err(device, "OUT OF MEMORY! "
992 "Could not allocate bitmap!\n");
993 } else {
994 drbd_err(device, "BM resizing failed. "
995 "Leaving size unchanged\n");
996 }
997 rv = DS_ERROR;
998 }
999
1000 drbd_set_my_capacity(device, size);
1001 md->la_size_sect = size;
1002 drbd_info(device, "size = %s (%llu KB)\n", ppsize(ppb, size>>1),
1003 (unsigned long long)size>>1);
1004 }
1005 if (rv <= DS_ERROR)
1006 goto err_out;
1007
1008 la_size_changed = (prev.last_agreed_sect != md->la_size_sect);
1009
1010 md_moved = prev.md_offset != md->md_offset
1011 || prev.md_size_sect != md->md_size_sect;
1012
1013 if (la_size_changed || md_moved || rs) {
1014 u32 prev_flags;
1015
1016
1017
1018
1019 del_timer(&device->md_sync_timer);
1020
1021
1022
1023
1024
1025 wait_event(device->al_wait, lc_try_lock_for_transaction(device->act_log));
1026
1027
1028 prev_flags = md->flags;
1029 md->flags |= MDF_FULL_SYNC | MDF_AL_DISABLED;
1030 drbd_md_write(device, buffer);
1031
1032 drbd_al_initialize(device, buffer);
1033
1034 drbd_info(device, "Writing the whole bitmap, %s\n",
1035 la_size_changed && md_moved ? "size changed and md moved" :
1036 la_size_changed ? "size changed" : "md moved");
1037
1038 drbd_bitmap_io(device, md_moved ? &drbd_bm_write_all : &drbd_bm_write,
1039 "size changed", BM_LOCKED_MASK);
1040
1041
1042
1043 md->flags = prev_flags;
1044 drbd_md_write(device, buffer);
1045
1046 if (rs)
1047 drbd_info(device, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n",
1048 md->al_stripes, md->al_stripe_size_4k * 4);
1049 }
1050
1051 if (size > prev.last_agreed_sect)
1052 rv = prev.last_agreed_sect ? DS_GREW : DS_GREW_FROM_ZERO;
1053 if (size < prev.last_agreed_sect)
1054 rv = DS_SHRUNK;
1055
1056 if (0) {
1057 err_out:
1058
1059 md->la_size_sect = prev.last_agreed_sect;
1060 md->md_offset = prev.md_offset;
1061 md->al_offset = prev.al_offset;
1062 md->bm_offset = prev.bm_offset;
1063 md->md_size_sect = prev.md_size_sect;
1064 md->al_stripes = prev.al_stripes;
1065 md->al_stripe_size_4k = prev.al_stripe_size_4k;
1066 md->al_size_4k = (u64)prev.al_stripes * prev.al_stripe_size_4k;
1067 }
1068 lc_unlock(device->act_log);
1069 wake_up(&device->al_wait);
1070 drbd_md_put_buffer(device);
1071 drbd_resume_io(device);
1072
1073 return rv;
1074}
1075
1076sector_t
1077drbd_new_dev_size(struct drbd_device *device, struct drbd_backing_dev *bdev,
1078 sector_t u_size, int assume_peer_has_space)
1079{
1080 sector_t p_size = device->p_size;
1081 sector_t la_size_sect = bdev->md.la_size_sect;
1082 sector_t m_size;
1083 sector_t size = 0;
1084
1085 m_size = drbd_get_max_capacity(bdev);
1086
1087 if (device->state.conn < C_CONNECTED && assume_peer_has_space) {
1088 drbd_warn(device, "Resize while not connected was forced by the user!\n");
1089 p_size = m_size;
1090 }
1091
1092 if (p_size && m_size) {
1093 size = min_t(sector_t, p_size, m_size);
1094 } else {
1095 if (la_size_sect) {
1096 size = la_size_sect;
1097 if (m_size && m_size < size)
1098 size = m_size;
1099 if (p_size && p_size < size)
1100 size = p_size;
1101 } else {
1102 if (m_size)
1103 size = m_size;
1104 if (p_size)
1105 size = p_size;
1106 }
1107 }
1108
1109 if (size == 0)
1110 drbd_err(device, "Both nodes diskless!\n");
1111
1112 if (u_size) {
1113 if (u_size > size)
1114 drbd_err(device, "Requested disk size is too big (%lu > %lu)\n",
1115 (unsigned long)u_size>>1, (unsigned long)size>>1);
1116 else
1117 size = u_size;
1118 }
1119
1120 return size;
1121}
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131static int drbd_check_al_size(struct drbd_device *device, struct disk_conf *dc)
1132{
1133 struct lru_cache *n, *t;
1134 struct lc_element *e;
1135 unsigned int in_use;
1136 int i;
1137
1138 if (device->act_log &&
1139 device->act_log->nr_elements == dc->al_extents)
1140 return 0;
1141
1142 in_use = 0;
1143 t = device->act_log;
1144 n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION,
1145 dc->al_extents, sizeof(struct lc_element), 0);
1146
1147 if (n == NULL) {
1148 drbd_err(device, "Cannot allocate act_log lru!\n");
1149 return -ENOMEM;
1150 }
1151 spin_lock_irq(&device->al_lock);
1152 if (t) {
1153 for (i = 0; i < t->nr_elements; i++) {
1154 e = lc_element_by_index(t, i);
1155 if (e->refcnt)
1156 drbd_err(device, "refcnt(%d)==%d\n",
1157 e->lc_number, e->refcnt);
1158 in_use += e->refcnt;
1159 }
1160 }
1161 if (!in_use)
1162 device->act_log = n;
1163 spin_unlock_irq(&device->al_lock);
1164 if (in_use) {
1165 drbd_err(device, "Activity log still in use!\n");
1166 lc_destroy(n);
1167 return -EBUSY;
1168 } else {
1169 lc_destroy(t);
1170 }
1171 drbd_md_mark_dirty(device);
1172 return 0;
1173}
1174
1175static void blk_queue_discard_granularity(struct request_queue *q, unsigned int granularity)
1176{
1177 q->limits.discard_granularity = granularity;
1178}
1179
1180static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection)
1181{
1182
1183
1184 if (connection->agreed_features & DRBD_FF_WSAME)
1185 return DRBD_MAX_BBIO_SECTORS;
1186
1187 return AL_EXTENT_SIZE >> 9;
1188}
1189
1190static void decide_on_discard_support(struct drbd_device *device,
1191 struct request_queue *q,
1192 struct request_queue *b,
1193 bool discard_zeroes_if_aligned)
1194{
1195
1196
1197
1198
1199 struct drbd_connection *connection = first_peer_device(device)->connection;
1200 bool can_do = b ? blk_queue_discard(b) : true;
1201
1202 if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_TRIM)) {
1203 can_do = false;
1204 drbd_info(connection, "peer DRBD too old, does not support TRIM: disabling discards\n");
1205 }
1206 if (can_do) {
1207
1208
1209
1210
1211
1212
1213 blk_queue_discard_granularity(q, 512);
1214 q->limits.max_discard_sectors = drbd_max_discard_sectors(connection);
1215 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
1216 q->limits.max_write_zeroes_sectors = drbd_max_discard_sectors(connection);
1217 } else {
1218 queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);
1219 blk_queue_discard_granularity(q, 0);
1220 q->limits.max_discard_sectors = 0;
1221 q->limits.max_write_zeroes_sectors = 0;
1222 }
1223}
1224
1225static void fixup_discard_if_not_supported(struct request_queue *q)
1226{
1227
1228
1229
1230
1231 if (!blk_queue_discard(q)) {
1232 blk_queue_max_discard_sectors(q, 0);
1233 blk_queue_discard_granularity(q, 0);
1234 }
1235}
1236
1237static void decide_on_write_same_support(struct drbd_device *device,
1238 struct request_queue *q,
1239 struct request_queue *b, struct o_qlim *o)
1240{
1241 struct drbd_peer_device *peer_device = first_peer_device(device);
1242 struct drbd_connection *connection = peer_device->connection;
1243 bool can_do = b ? b->limits.max_write_same_sectors : true;
1244
1245 if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_WSAME)) {
1246 can_do = false;
1247 drbd_info(peer_device, "peer does not support WRITE_SAME\n");
1248 }
1249
1250 if (o) {
1251
1252 unsigned int peer_lbs = be32_to_cpu(o->logical_block_size);
1253 unsigned int me_lbs_b = queue_logical_block_size(b);
1254 unsigned int me_lbs = queue_logical_block_size(q);
1255
1256 if (me_lbs_b != me_lbs) {
1257 drbd_warn(device,
1258 "logical block size of local backend does not match (drbd:%u, backend:%u); was this a late attach?\n",
1259 me_lbs, me_lbs_b);
1260
1261 can_do = false;
1262 }
1263 if (me_lbs_b != peer_lbs) {
1264 drbd_warn(peer_device, "logical block sizes do not match (me:%u, peer:%u); this may cause problems.\n",
1265 me_lbs, peer_lbs);
1266 if (can_do) {
1267 drbd_dbg(peer_device, "logical block size mismatch: WRITE_SAME disabled.\n");
1268 can_do = false;
1269 }
1270 me_lbs = max(me_lbs, me_lbs_b);
1271
1272
1273
1274 if (peer_lbs > me_lbs) {
1275 if (device->state.role != R_PRIMARY) {
1276 blk_queue_logical_block_size(q, peer_lbs);
1277 drbd_warn(peer_device, "logical block size set to %u\n", peer_lbs);
1278 } else {
1279 drbd_warn(peer_device,
1280 "current Primary must NOT adjust logical block size (%u -> %u); hope for the best.\n",
1281 me_lbs, peer_lbs);
1282 }
1283 }
1284 }
1285 if (can_do && !o->write_same_capable) {
1286
1287
1288 drbd_dbg(peer_device, "WRITE_SAME disabled (peer device not capable)\n");
1289 can_do = false;
1290 }
1291 }
1292
1293 blk_queue_max_write_same_sectors(q, can_do ? DRBD_MAX_BBIO_SECTORS : 0);
1294}
1295
1296static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backing_dev *bdev,
1297 unsigned int max_bio_size, struct o_qlim *o)
1298{
1299 struct request_queue * const q = device->rq_queue;
1300 unsigned int max_hw_sectors = max_bio_size >> 9;
1301 unsigned int max_segments = 0;
1302 struct request_queue *b = NULL;
1303 struct disk_conf *dc;
1304 bool discard_zeroes_if_aligned = true;
1305
1306 if (bdev) {
1307 b = bdev->backing_bdev->bd_disk->queue;
1308
1309 max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
1310 rcu_read_lock();
1311 dc = rcu_dereference(device->ldev->disk_conf);
1312 max_segments = dc->max_bio_bvecs;
1313 discard_zeroes_if_aligned = dc->discard_zeroes_if_aligned;
1314 rcu_read_unlock();
1315
1316 blk_set_stacking_limits(&q->limits);
1317 }
1318
1319 blk_queue_max_hw_sectors(q, max_hw_sectors);
1320
1321 blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
1322 blk_queue_segment_boundary(q, PAGE_SIZE-1);
1323 decide_on_discard_support(device, q, b, discard_zeroes_if_aligned);
1324 decide_on_write_same_support(device, q, b, o);
1325
1326 if (b) {
1327 blk_queue_stack_limits(q, b);
1328
1329 if (q->backing_dev_info->ra_pages !=
1330 b->backing_dev_info->ra_pages) {
1331 drbd_info(device, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
1332 q->backing_dev_info->ra_pages,
1333 b->backing_dev_info->ra_pages);
1334 q->backing_dev_info->ra_pages =
1335 b->backing_dev_info->ra_pages;
1336 }
1337 }
1338 fixup_discard_if_not_supported(q);
1339}
1340
1341void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev, struct o_qlim *o)
1342{
1343 unsigned int now, new, local, peer;
1344
1345 now = queue_max_hw_sectors(device->rq_queue) << 9;
1346 local = device->local_max_bio_size;
1347 peer = device->peer_max_bio_size;
1348
1349 if (bdev) {
1350 local = queue_max_hw_sectors(bdev->backing_bdev->bd_disk->queue) << 9;
1351 device->local_max_bio_size = local;
1352 }
1353 local = min(local, DRBD_MAX_BIO_SIZE);
1354
1355
1356
1357
1358 if (device->state.conn >= C_WF_REPORT_PARAMS) {
1359 if (first_peer_device(device)->connection->agreed_pro_version < 94)
1360 peer = min(device->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
1361
1362 else if (first_peer_device(device)->connection->agreed_pro_version == 94)
1363 peer = DRBD_MAX_SIZE_H80_PACKET;
1364 else if (first_peer_device(device)->connection->agreed_pro_version < 100)
1365 peer = DRBD_MAX_BIO_SIZE_P95;
1366 else
1367 peer = DRBD_MAX_BIO_SIZE;
1368
1369
1370
1371
1372
1373 if (peer > device->peer_max_bio_size)
1374 device->peer_max_bio_size = peer;
1375 }
1376 new = min(local, peer);
1377
1378 if (device->state.role == R_PRIMARY && new < now)
1379 drbd_err(device, "ASSERT FAILED new < now; (%u < %u)\n", new, now);
1380
1381 if (new != now)
1382 drbd_info(device, "max BIO size = %u\n", new);
1383
1384 drbd_setup_queue_param(device, bdev, new, o);
1385}
1386
1387
1388static void conn_reconfig_start(struct drbd_connection *connection)
1389{
1390 drbd_thread_start(&connection->worker);
1391 drbd_flush_workqueue(&connection->sender_work);
1392}
1393
1394
1395static void conn_reconfig_done(struct drbd_connection *connection)
1396{
1397 bool stop_threads;
1398 spin_lock_irq(&connection->resource->req_lock);
1399 stop_threads = conn_all_vols_unconf(connection) &&
1400 connection->cstate == C_STANDALONE;
1401 spin_unlock_irq(&connection->resource->req_lock);
1402 if (stop_threads) {
1403
1404
1405 drbd_thread_stop(&connection->receiver);
1406 drbd_thread_stop(&connection->worker);
1407 }
1408}
1409
1410
1411static void drbd_suspend_al(struct drbd_device *device)
1412{
1413 int s = 0;
1414
1415 if (!lc_try_lock(device->act_log)) {
1416 drbd_warn(device, "Failed to lock al in drbd_suspend_al()\n");
1417 return;
1418 }
1419
1420 drbd_al_shrink(device);
1421 spin_lock_irq(&device->resource->req_lock);
1422 if (device->state.conn < C_CONNECTED)
1423 s = !test_and_set_bit(AL_SUSPENDED, &device->flags);
1424 spin_unlock_irq(&device->resource->req_lock);
1425 lc_unlock(device->act_log);
1426
1427 if (s)
1428 drbd_info(device, "Suspended AL updates\n");
1429}
1430
1431
1432static bool should_set_defaults(struct genl_info *info)
1433{
1434 unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags;
1435 return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS);
1436}
1437
1438static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev)
1439{
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453 const unsigned int max_al_nr = DRBD_AL_EXTENTS_MAX;
1454 const unsigned int sufficient_on_disk =
1455 (max_al_nr + AL_CONTEXT_PER_TRANSACTION -1)
1456 /AL_CONTEXT_PER_TRANSACTION;
1457
1458 unsigned int al_size_4k = bdev->md.al_size_4k;
1459
1460 if (al_size_4k > sufficient_on_disk)
1461 return max_al_nr;
1462
1463 return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION;
1464}
1465
1466static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b)
1467{
1468 return a->disk_barrier != b->disk_barrier ||
1469 a->disk_flushes != b->disk_flushes ||
1470 a->disk_drain != b->disk_drain;
1471}
1472
1473static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *disk_conf,
1474 struct drbd_backing_dev *nbc)
1475{
1476 struct request_queue * const q = nbc->backing_bdev->bd_disk->queue;
1477
1478 if (disk_conf->al_extents < DRBD_AL_EXTENTS_MIN)
1479 disk_conf->al_extents = DRBD_AL_EXTENTS_MIN;
1480 if (disk_conf->al_extents > drbd_al_extents_max(nbc))
1481 disk_conf->al_extents = drbd_al_extents_max(nbc);
1482
1483 if (!blk_queue_discard(q)) {
1484 if (disk_conf->rs_discard_granularity) {
1485 disk_conf->rs_discard_granularity = 0;
1486 drbd_info(device, "rs_discard_granularity feature disabled\n");
1487 }
1488 }
1489
1490 if (disk_conf->rs_discard_granularity) {
1491 int orig_value = disk_conf->rs_discard_granularity;
1492 int remainder;
1493
1494 if (q->limits.discard_granularity > disk_conf->rs_discard_granularity)
1495 disk_conf->rs_discard_granularity = q->limits.discard_granularity;
1496
1497 remainder = disk_conf->rs_discard_granularity % q->limits.discard_granularity;
1498 disk_conf->rs_discard_granularity += remainder;
1499
1500 if (disk_conf->rs_discard_granularity > q->limits.max_discard_sectors << 9)
1501 disk_conf->rs_discard_granularity = q->limits.max_discard_sectors << 9;
1502
1503 if (disk_conf->rs_discard_granularity != orig_value)
1504 drbd_info(device, "rs_discard_granularity changed to %d\n",
1505 disk_conf->rs_discard_granularity);
1506 }
1507}
1508
1509int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
1510{
1511 struct drbd_config_context adm_ctx;
1512 enum drbd_ret_code retcode;
1513 struct drbd_device *device;
1514 struct disk_conf *new_disk_conf, *old_disk_conf;
1515 struct fifo_buffer *old_plan = NULL, *new_plan = NULL;
1516 int err, fifo_size;
1517
1518 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
1519 if (!adm_ctx.reply_skb)
1520 return retcode;
1521 if (retcode != NO_ERROR)
1522 goto finish;
1523
1524 device = adm_ctx.device;
1525 mutex_lock(&adm_ctx.resource->adm_mutex);
1526
1527
1528
1529 if (!get_ldev(device)) {
1530 retcode = ERR_NO_DISK;
1531 goto out;
1532 }
1533
1534 new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
1535 if (!new_disk_conf) {
1536 retcode = ERR_NOMEM;
1537 goto fail;
1538 }
1539
1540 mutex_lock(&device->resource->conf_update);
1541 old_disk_conf = device->ldev->disk_conf;
1542 *new_disk_conf = *old_disk_conf;
1543 if (should_set_defaults(info))
1544 set_disk_conf_defaults(new_disk_conf);
1545
1546 err = disk_conf_from_attrs_for_change(new_disk_conf, info);
1547 if (err && err != -ENOMSG) {
1548 retcode = ERR_MANDATORY_TAG;
1549 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
1550 goto fail_unlock;
1551 }
1552
1553 if (!expect(new_disk_conf->resync_rate >= 1))
1554 new_disk_conf->resync_rate = 1;
1555
1556 sanitize_disk_conf(device, new_disk_conf, device->ldev);
1557
1558 if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
1559 new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
1560
1561 fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
1562 if (fifo_size != device->rs_plan_s->size) {
1563 new_plan = fifo_alloc(fifo_size);
1564 if (!new_plan) {
1565 drbd_err(device, "kmalloc of fifo_buffer failed");
1566 retcode = ERR_NOMEM;
1567 goto fail_unlock;
1568 }
1569 }
1570
1571 drbd_suspend_io(device);
1572 wait_event(device->al_wait, lc_try_lock(device->act_log));
1573 drbd_al_shrink(device);
1574 err = drbd_check_al_size(device, new_disk_conf);
1575 lc_unlock(device->act_log);
1576 wake_up(&device->al_wait);
1577 drbd_resume_io(device);
1578
1579 if (err) {
1580 retcode = ERR_NOMEM;
1581 goto fail_unlock;
1582 }
1583
1584 lock_all_resources();
1585 retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after);
1586 if (retcode == NO_ERROR) {
1587 rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf);
1588 drbd_resync_after_changed(device);
1589 }
1590 unlock_all_resources();
1591
1592 if (retcode != NO_ERROR)
1593 goto fail_unlock;
1594
1595 if (new_plan) {
1596 old_plan = device->rs_plan_s;
1597 rcu_assign_pointer(device->rs_plan_s, new_plan);
1598 }
1599
1600 mutex_unlock(&device->resource->conf_update);
1601
1602 if (new_disk_conf->al_updates)
1603 device->ldev->md.flags &= ~MDF_AL_DISABLED;
1604 else
1605 device->ldev->md.flags |= MDF_AL_DISABLED;
1606
1607 if (new_disk_conf->md_flushes)
1608 clear_bit(MD_NO_FUA, &device->flags);
1609 else
1610 set_bit(MD_NO_FUA, &device->flags);
1611
1612 if (write_ordering_changed(old_disk_conf, new_disk_conf))
1613 drbd_bump_write_ordering(device->resource, NULL, WO_BDEV_FLUSH);
1614
1615 if (old_disk_conf->discard_zeroes_if_aligned != new_disk_conf->discard_zeroes_if_aligned)
1616 drbd_reconsider_queue_parameters(device, device->ldev, NULL);
1617
1618 drbd_md_sync(device);
1619
1620 if (device->state.conn >= C_CONNECTED) {
1621 struct drbd_peer_device *peer_device;
1622
1623 for_each_peer_device(peer_device, device)
1624 drbd_send_sync_param(peer_device);
1625 }
1626
1627 synchronize_rcu();
1628 kfree(old_disk_conf);
1629 kfree(old_plan);
1630 mod_timer(&device->request_timer, jiffies + HZ);
1631 goto success;
1632
1633fail_unlock:
1634 mutex_unlock(&device->resource->conf_update);
1635 fail:
1636 kfree(new_disk_conf);
1637 kfree(new_plan);
1638success:
1639 put_ldev(device);
1640 out:
1641 mutex_unlock(&adm_ctx.resource->adm_mutex);
1642 finish:
1643 drbd_adm_finish(&adm_ctx, info, retcode);
1644 return 0;
1645}
1646
1647static struct block_device *open_backing_dev(struct drbd_device *device,
1648 const char *bdev_path, void *claim_ptr, bool do_bd_link)
1649{
1650 struct block_device *bdev;
1651 int err = 0;
1652
1653 bdev = blkdev_get_by_path(bdev_path,
1654 FMODE_READ | FMODE_WRITE | FMODE_EXCL, claim_ptr);
1655 if (IS_ERR(bdev)) {
1656 drbd_err(device, "open(\"%s\") failed with %ld\n",
1657 bdev_path, PTR_ERR(bdev));
1658 return bdev;
1659 }
1660
1661 if (!do_bd_link)
1662 return bdev;
1663
1664 err = bd_link_disk_holder(bdev, device->vdisk);
1665 if (err) {
1666 blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
1667 drbd_err(device, "bd_link_disk_holder(\"%s\", ...) failed with %d\n",
1668 bdev_path, err);
1669 bdev = ERR_PTR(err);
1670 }
1671 return bdev;
1672}
1673
1674static int open_backing_devices(struct drbd_device *device,
1675 struct disk_conf *new_disk_conf,
1676 struct drbd_backing_dev *nbc)
1677{
1678 struct block_device *bdev;
1679
1680 bdev = open_backing_dev(device, new_disk_conf->backing_dev, device, true);
1681 if (IS_ERR(bdev))
1682 return ERR_OPEN_DISK;
1683 nbc->backing_bdev = bdev;
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693 bdev = open_backing_dev(device, new_disk_conf->meta_dev,
1694
1695
1696 (new_disk_conf->meta_dev_idx < 0) ? (void*)device : (void*)drbd_m_holder,
1697
1698
1699 (new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_FLEX_INT &&
1700 new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_INTERNAL));
1701 if (IS_ERR(bdev))
1702 return ERR_OPEN_MD_DISK;
1703 nbc->md_bdev = bdev;
1704 return NO_ERROR;
1705}
1706
1707static void close_backing_dev(struct drbd_device *device, struct block_device *bdev,
1708 bool do_bd_unlink)
1709{
1710 if (!bdev)
1711 return;
1712 if (do_bd_unlink)
1713 bd_unlink_disk_holder(bdev, device->vdisk);
1714 blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
1715}
1716
1717void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev)
1718{
1719 if (ldev == NULL)
1720 return;
1721
1722 close_backing_dev(device, ldev->md_bdev, ldev->md_bdev != ldev->backing_bdev);
1723 close_backing_dev(device, ldev->backing_bdev, true);
1724
1725 kfree(ldev->disk_conf);
1726 kfree(ldev);
1727}
1728
1729int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
1730{
1731 struct drbd_config_context adm_ctx;
1732 struct drbd_device *device;
1733 struct drbd_peer_device *peer_device;
1734 struct drbd_connection *connection;
1735 int err;
1736 enum drbd_ret_code retcode;
1737 enum determine_dev_size dd;
1738 sector_t max_possible_sectors;
1739 sector_t min_md_device_sectors;
1740 struct drbd_backing_dev *nbc = NULL;
1741 struct disk_conf *new_disk_conf = NULL;
1742 struct lru_cache *resync_lru = NULL;
1743 struct fifo_buffer *new_plan = NULL;
1744 union drbd_state ns, os;
1745 enum drbd_state_rv rv;
1746 struct net_conf *nc;
1747
1748 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
1749 if (!adm_ctx.reply_skb)
1750 return retcode;
1751 if (retcode != NO_ERROR)
1752 goto finish;
1753
1754 device = adm_ctx.device;
1755 mutex_lock(&adm_ctx.resource->adm_mutex);
1756 peer_device = first_peer_device(device);
1757 connection = peer_device->connection;
1758 conn_reconfig_start(connection);
1759
1760
1761 if (device->state.disk > D_DISKLESS) {
1762 retcode = ERR_DISK_CONFIGURED;
1763 goto fail;
1764 }
1765
1766
1767
1768
1769 wait_event(device->misc_wait, !test_bit(GOING_DISKLESS, &device->flags));
1770
1771
1772 clear_bit(FORCE_DETACH, &device->flags);
1773 clear_bit(WAS_IO_ERROR, &device->flags);
1774 clear_bit(WAS_READ_ERROR, &device->flags);
1775
1776
1777 device->rs_total = 0;
1778 device->rs_failed = 0;
1779 atomic_set(&device->rs_pending_cnt, 0);
1780
1781
1782 nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL);
1783 if (!nbc) {
1784 retcode = ERR_NOMEM;
1785 goto fail;
1786 }
1787 spin_lock_init(&nbc->md.uuid_lock);
1788
1789 new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL);
1790 if (!new_disk_conf) {
1791 retcode = ERR_NOMEM;
1792 goto fail;
1793 }
1794 nbc->disk_conf = new_disk_conf;
1795
1796 set_disk_conf_defaults(new_disk_conf);
1797 err = disk_conf_from_attrs(new_disk_conf, info);
1798 if (err) {
1799 retcode = ERR_MANDATORY_TAG;
1800 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
1801 goto fail;
1802 }
1803
1804 if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
1805 new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
1806
1807 new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ);
1808 if (!new_plan) {
1809 retcode = ERR_NOMEM;
1810 goto fail;
1811 }
1812
1813 if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) {
1814 retcode = ERR_MD_IDX_INVALID;
1815 goto fail;
1816 }
1817
1818 rcu_read_lock();
1819 nc = rcu_dereference(connection->net_conf);
1820 if (nc) {
1821 if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) {
1822 rcu_read_unlock();
1823 retcode = ERR_STONITH_AND_PROT_A;
1824 goto fail;
1825 }
1826 }
1827 rcu_read_unlock();
1828
1829 retcode = open_backing_devices(device, new_disk_conf, nbc);
1830 if (retcode != NO_ERROR)
1831 goto fail;
1832
1833 if ((nbc->backing_bdev == nbc->md_bdev) !=
1834 (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL ||
1835 new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) {
1836 retcode = ERR_MD_IDX_INVALID;
1837 goto fail;
1838 }
1839
1840 resync_lru = lc_create("resync", drbd_bm_ext_cache,
1841 1, 61, sizeof(struct bm_extent),
1842 offsetof(struct bm_extent, lce));
1843 if (!resync_lru) {
1844 retcode = ERR_NOMEM;
1845 goto fail;
1846 }
1847
1848
1849
1850 retcode = drbd_md_read(device, nbc);
1851 if (retcode != NO_ERROR)
1852 goto fail;
1853
1854 sanitize_disk_conf(device, new_disk_conf, nbc);
1855
1856 if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) {
1857 drbd_err(device, "max capacity %llu smaller than disk size %llu\n",
1858 (unsigned long long) drbd_get_max_capacity(nbc),
1859 (unsigned long long) new_disk_conf->disk_size);
1860 retcode = ERR_DISK_TOO_SMALL;
1861 goto fail;
1862 }
1863
1864 if (new_disk_conf->meta_dev_idx < 0) {
1865 max_possible_sectors = DRBD_MAX_SECTORS_FLEX;
1866
1867 min_md_device_sectors = (2<<10);
1868 } else {
1869 max_possible_sectors = DRBD_MAX_SECTORS;
1870 min_md_device_sectors = MD_128MB_SECT * (new_disk_conf->meta_dev_idx + 1);
1871 }
1872
1873 if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) {
1874 retcode = ERR_MD_DISK_TOO_SMALL;
1875 drbd_warn(device, "refusing attach: md-device too small, "
1876 "at least %llu sectors needed for this meta-disk type\n",
1877 (unsigned long long) min_md_device_sectors);
1878 goto fail;
1879 }
1880
1881
1882
1883 if (drbd_get_max_capacity(nbc) <
1884 drbd_get_capacity(device->this_bdev)) {
1885 retcode = ERR_DISK_TOO_SMALL;
1886 goto fail;
1887 }
1888
1889 nbc->known_size = drbd_get_capacity(nbc->backing_bdev);
1890
1891 if (nbc->known_size > max_possible_sectors) {
1892 drbd_warn(device, "==> truncating very big lower level device "
1893 "to currently maximum possible %llu sectors <==\n",
1894 (unsigned long long) max_possible_sectors);
1895 if (new_disk_conf->meta_dev_idx >= 0)
1896 drbd_warn(device, "==>> using internal or flexible "
1897 "meta data may help <<==\n");
1898 }
1899
1900 drbd_suspend_io(device);
1901
1902
1903
1904
1905
1906
1907
1908 wait_event(device->misc_wait, !atomic_read(&device->ap_pending_cnt) || drbd_suspended(device));
1909
1910 drbd_flush_workqueue(&connection->sender_work);
1911
1912 rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE);
1913 retcode = rv;
1914 drbd_resume_io(device);
1915 if (rv < SS_SUCCESS)
1916 goto fail;
1917
1918 if (!get_ldev_if_state(device, D_ATTACHING))
1919 goto force_diskless;
1920
1921 if (!device->bitmap) {
1922 if (drbd_bm_init(device)) {
1923 retcode = ERR_NOMEM;
1924 goto force_diskless_dec;
1925 }
1926 }
1927
1928 if (device->state.conn < C_CONNECTED &&
1929 device->state.role == R_PRIMARY && device->ed_uuid &&
1930 (device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
1931 drbd_err(device, "Can only attach to data with current UUID=%016llX\n",
1932 (unsigned long long)device->ed_uuid);
1933 retcode = ERR_DATA_NOT_CURRENT;
1934 goto force_diskless_dec;
1935 }
1936
1937
1938 if (drbd_check_al_size(device, new_disk_conf)) {
1939 retcode = ERR_NOMEM;
1940 goto force_diskless_dec;
1941 }
1942
1943
1944 if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
1945 drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) {
1946 drbd_warn(device, "refusing to truncate a consistent device\n");
1947 retcode = ERR_DISK_TOO_SMALL;
1948 goto force_diskless_dec;
1949 }
1950
1951 lock_all_resources();
1952 retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after);
1953 if (retcode != NO_ERROR) {
1954 unlock_all_resources();
1955 goto force_diskless_dec;
1956 }
1957
1958
1959
1960 if (new_disk_conf->md_flushes)
1961 clear_bit(MD_NO_FUA, &device->flags);
1962 else
1963 set_bit(MD_NO_FUA, &device->flags);
1964
1965
1966
1967
1968
1969 D_ASSERT(device, device->ldev == NULL);
1970 device->ldev = nbc;
1971 device->resync = resync_lru;
1972 device->rs_plan_s = new_plan;
1973 nbc = NULL;
1974 resync_lru = NULL;
1975 new_disk_conf = NULL;
1976 new_plan = NULL;
1977
1978 drbd_resync_after_changed(device);
1979 drbd_bump_write_ordering(device->resource, device->ldev, WO_BDEV_FLUSH);
1980 unlock_all_resources();
1981
1982 if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY))
1983 set_bit(CRASHED_PRIMARY, &device->flags);
1984 else
1985 clear_bit(CRASHED_PRIMARY, &device->flags);
1986
1987 if (drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) &&
1988 !(device->state.role == R_PRIMARY && device->resource->susp_nod))
1989 set_bit(CRASHED_PRIMARY, &device->flags);
1990
1991 device->send_cnt = 0;
1992 device->recv_cnt = 0;
1993 device->read_cnt = 0;
1994 device->writ_cnt = 0;
1995
1996 drbd_reconsider_queue_parameters(device, device->ldev, NULL);
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012 clear_bit(USE_DEGR_WFC_T, &device->flags);
2013 if (device->state.role != R_PRIMARY &&
2014 drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) &&
2015 !drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND))
2016 set_bit(USE_DEGR_WFC_T, &device->flags);
2017
2018 dd = drbd_determine_dev_size(device, 0, NULL);
2019 if (dd <= DS_ERROR) {
2020 retcode = ERR_NOMEM_BITMAP;
2021 goto force_diskless_dec;
2022 } else if (dd == DS_GREW)
2023 set_bit(RESYNC_AFTER_NEG, &device->flags);
2024
2025 if (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) ||
2026 (test_bit(CRASHED_PRIMARY, &device->flags) &&
2027 drbd_md_test_flag(device->ldev, MDF_AL_DISABLED))) {
2028 drbd_info(device, "Assuming that all blocks are out of sync "
2029 "(aka FullSync)\n");
2030 if (drbd_bitmap_io(device, &drbd_bmio_set_n_write,
2031 "set_n_write from attaching", BM_LOCKED_MASK)) {
2032 retcode = ERR_IO_MD_DISK;
2033 goto force_diskless_dec;
2034 }
2035 } else {
2036 if (drbd_bitmap_io(device, &drbd_bm_read,
2037 "read from attaching", BM_LOCKED_MASK)) {
2038 retcode = ERR_IO_MD_DISK;
2039 goto force_diskless_dec;
2040 }
2041 }
2042
2043 if (_drbd_bm_total_weight(device) == drbd_bm_bits(device))
2044 drbd_suspend_al(device);
2045
2046 spin_lock_irq(&device->resource->req_lock);
2047 os = drbd_read_state(device);
2048 ns = os;
2049
2050
2051
2052
2053
2054 if (drbd_md_test_flag(device->ldev, MDF_CONSISTENT)) {
2055 if (drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE))
2056 ns.disk = D_CONSISTENT;
2057 else
2058 ns.disk = D_OUTDATED;
2059 } else {
2060 ns.disk = D_INCONSISTENT;
2061 }
2062
2063 if (drbd_md_test_flag(device->ldev, MDF_PEER_OUT_DATED))
2064 ns.pdsk = D_OUTDATED;
2065
2066 rcu_read_lock();
2067 if (ns.disk == D_CONSISTENT &&
2068 (ns.pdsk == D_OUTDATED || rcu_dereference(device->ldev->disk_conf)->fencing == FP_DONT_CARE))
2069 ns.disk = D_UP_TO_DATE;
2070
2071
2072
2073
2074
2075
2076 if (rcu_dereference(device->ldev->disk_conf)->al_updates)
2077 device->ldev->md.flags &= ~MDF_AL_DISABLED;
2078 else
2079 device->ldev->md.flags |= MDF_AL_DISABLED;
2080
2081 rcu_read_unlock();
2082
2083
2084
2085 if (device->state.conn == C_CONNECTED) {
2086 device->new_state_tmp.i = ns.i;
2087 ns.i = os.i;
2088 ns.disk = D_NEGOTIATING;
2089
2090
2091
2092
2093 kfree(device->p_uuid);
2094 device->p_uuid = NULL;
2095 }
2096
2097 rv = _drbd_set_state(device, ns, CS_VERBOSE, NULL);
2098 spin_unlock_irq(&device->resource->req_lock);
2099
2100 if (rv < SS_SUCCESS)
2101 goto force_diskless_dec;
2102
2103 mod_timer(&device->request_timer, jiffies + HZ);
2104
2105 if (device->state.role == R_PRIMARY)
2106 device->ldev->md.uuid[UI_CURRENT] |= (u64)1;
2107 else
2108 device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
2109
2110 drbd_md_mark_dirty(device);
2111 drbd_md_sync(device);
2112
2113 kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE);
2114 put_ldev(device);
2115 conn_reconfig_done(connection);
2116 mutex_unlock(&adm_ctx.resource->adm_mutex);
2117 drbd_adm_finish(&adm_ctx, info, retcode);
2118 return 0;
2119
2120 force_diskless_dec:
2121 put_ldev(device);
2122 force_diskless:
2123 drbd_force_state(device, NS(disk, D_DISKLESS));
2124 drbd_md_sync(device);
2125 fail:
2126 conn_reconfig_done(connection);
2127 if (nbc) {
2128 close_backing_dev(device, nbc->md_bdev, nbc->md_bdev != nbc->backing_bdev);
2129 close_backing_dev(device, nbc->backing_bdev, true);
2130 kfree(nbc);
2131 }
2132 kfree(new_disk_conf);
2133 lc_destroy(resync_lru);
2134 kfree(new_plan);
2135 mutex_unlock(&adm_ctx.resource->adm_mutex);
2136 finish:
2137 drbd_adm_finish(&adm_ctx, info, retcode);
2138 return 0;
2139}
2140
2141static int adm_detach(struct drbd_device *device, int force)
2142{
2143 enum drbd_state_rv retcode;
2144 void *buffer;
2145 int ret;
2146
2147 if (force) {
2148 set_bit(FORCE_DETACH, &device->flags);
2149 drbd_force_state(device, NS(disk, D_FAILED));
2150 retcode = SS_SUCCESS;
2151 goto out;
2152 }
2153
2154 drbd_suspend_io(device);
2155 buffer = drbd_md_get_buffer(device, __func__);
2156 if (buffer) {
2157 retcode = drbd_request_state(device, NS(disk, D_FAILED));
2158 drbd_md_put_buffer(device);
2159 } else
2160 retcode = SS_NOTHING_TO_DO;
2161
2162 drbd_resume_io(device);
2163 ret = wait_event_interruptible(device->misc_wait,
2164 device->state.disk != D_FAILED);
2165 if ((int)retcode == (int)SS_IS_DISKLESS)
2166 retcode = SS_NOTHING_TO_DO;
2167 if (ret)
2168 retcode = ERR_INTR;
2169out:
2170 return retcode;
2171}
2172
2173
2174
2175
2176
2177
2178int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info)
2179{
2180 struct drbd_config_context adm_ctx;
2181 enum drbd_ret_code retcode;
2182 struct detach_parms parms = { };
2183 int err;
2184
2185 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
2186 if (!adm_ctx.reply_skb)
2187 return retcode;
2188 if (retcode != NO_ERROR)
2189 goto out;
2190
2191 if (info->attrs[DRBD_NLA_DETACH_PARMS]) {
2192 err = detach_parms_from_attrs(&parms, info);
2193 if (err) {
2194 retcode = ERR_MANDATORY_TAG;
2195 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
2196 goto out;
2197 }
2198 }
2199
2200 mutex_lock(&adm_ctx.resource->adm_mutex);
2201 retcode = adm_detach(adm_ctx.device, parms.force_detach);
2202 mutex_unlock(&adm_ctx.resource->adm_mutex);
2203out:
2204 drbd_adm_finish(&adm_ctx, info, retcode);
2205 return 0;
2206}
2207
2208static bool conn_resync_running(struct drbd_connection *connection)
2209{
2210 struct drbd_peer_device *peer_device;
2211 bool rv = false;
2212 int vnr;
2213
2214 rcu_read_lock();
2215 idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
2216 struct drbd_device *device = peer_device->device;
2217 if (device->state.conn == C_SYNC_SOURCE ||
2218 device->state.conn == C_SYNC_TARGET ||
2219 device->state.conn == C_PAUSED_SYNC_S ||
2220 device->state.conn == C_PAUSED_SYNC_T) {
2221 rv = true;
2222 break;
2223 }
2224 }
2225 rcu_read_unlock();
2226
2227 return rv;
2228}
2229
2230static bool conn_ov_running(struct drbd_connection *connection)
2231{
2232 struct drbd_peer_device *peer_device;
2233 bool rv = false;
2234 int vnr;
2235
2236 rcu_read_lock();
2237 idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
2238 struct drbd_device *device = peer_device->device;
2239 if (device->state.conn == C_VERIFY_S ||
2240 device->state.conn == C_VERIFY_T) {
2241 rv = true;
2242 break;
2243 }
2244 }
2245 rcu_read_unlock();
2246
2247 return rv;
2248}
2249
2250static enum drbd_ret_code
2251_check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_conf *new_net_conf)
2252{
2253 struct drbd_peer_device *peer_device;
2254 int i;
2255
2256 if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 100) {
2257 if (new_net_conf->wire_protocol != old_net_conf->wire_protocol)
2258 return ERR_NEED_APV_100;
2259
2260 if (new_net_conf->two_primaries != old_net_conf->two_primaries)
2261 return ERR_NEED_APV_100;
2262
2263 if (strcmp(new_net_conf->integrity_alg, old_net_conf->integrity_alg))
2264 return ERR_NEED_APV_100;
2265 }
2266
2267 if (!new_net_conf->two_primaries &&
2268 conn_highest_role(connection) == R_PRIMARY &&
2269 conn_highest_peer(connection) == R_PRIMARY)
2270 return ERR_NEED_ALLOW_TWO_PRI;
2271
2272 if (new_net_conf->two_primaries &&
2273 (new_net_conf->wire_protocol != DRBD_PROT_C))
2274 return ERR_NOT_PROTO_C;
2275
2276 idr_for_each_entry(&connection->peer_devices, peer_device, i) {
2277 struct drbd_device *device = peer_device->device;
2278 if (get_ldev(device)) {
2279 enum drbd_fencing_p fp = rcu_dereference(device->ldev->disk_conf)->fencing;
2280 put_ldev(device);
2281 if (new_net_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH)
2282 return ERR_STONITH_AND_PROT_A;
2283 }
2284 if (device->state.role == R_PRIMARY && new_net_conf->discard_my_data)
2285 return ERR_DISCARD_IMPOSSIBLE;
2286 }
2287
2288 if (new_net_conf->on_congestion != OC_BLOCK && new_net_conf->wire_protocol != DRBD_PROT_A)
2289 return ERR_CONG_NOT_PROTO_A;
2290
2291 return NO_ERROR;
2292}
2293
2294static enum drbd_ret_code
2295check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf)
2296{
2297 static enum drbd_ret_code rv;
2298 struct drbd_peer_device *peer_device;
2299 int i;
2300
2301 rcu_read_lock();
2302 rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf);
2303 rcu_read_unlock();
2304
2305
2306 idr_for_each_entry(&connection->peer_devices, peer_device, i) {
2307 struct drbd_device *device = peer_device->device;
2308 if (!device->bitmap) {
2309 if (drbd_bm_init(device))
2310 return ERR_NOMEM;
2311 }
2312 }
2313
2314 return rv;
2315}
2316
2317struct crypto {
2318 struct crypto_ahash *verify_tfm;
2319 struct crypto_ahash *csums_tfm;
2320 struct crypto_shash *cram_hmac_tfm;
2321 struct crypto_ahash *integrity_tfm;
2322};
2323
2324static int
2325alloc_shash(struct crypto_shash **tfm, char *tfm_name, int err_alg)
2326{
2327 if (!tfm_name[0])
2328 return NO_ERROR;
2329
2330 *tfm = crypto_alloc_shash(tfm_name, 0, 0);
2331 if (IS_ERR(*tfm)) {
2332 *tfm = NULL;
2333 return err_alg;
2334 }
2335
2336 return NO_ERROR;
2337}
2338
2339static int
2340alloc_ahash(struct crypto_ahash **tfm, char *tfm_name, int err_alg)
2341{
2342 if (!tfm_name[0])
2343 return NO_ERROR;
2344
2345 *tfm = crypto_alloc_ahash(tfm_name, 0, CRYPTO_ALG_ASYNC);
2346 if (IS_ERR(*tfm)) {
2347 *tfm = NULL;
2348 return err_alg;
2349 }
2350
2351 return NO_ERROR;
2352}
2353
2354static enum drbd_ret_code
2355alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf)
2356{
2357 char hmac_name[CRYPTO_MAX_ALG_NAME];
2358 enum drbd_ret_code rv;
2359
2360 rv = alloc_ahash(&crypto->csums_tfm, new_net_conf->csums_alg,
2361 ERR_CSUMS_ALG);
2362 if (rv != NO_ERROR)
2363 return rv;
2364 rv = alloc_ahash(&crypto->verify_tfm, new_net_conf->verify_alg,
2365 ERR_VERIFY_ALG);
2366 if (rv != NO_ERROR)
2367 return rv;
2368 rv = alloc_ahash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
2369 ERR_INTEGRITY_ALG);
2370 if (rv != NO_ERROR)
2371 return rv;
2372 if (new_net_conf->cram_hmac_alg[0] != 0) {
2373 snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
2374 new_net_conf->cram_hmac_alg);
2375
2376 rv = alloc_shash(&crypto->cram_hmac_tfm, hmac_name,
2377 ERR_AUTH_ALG);
2378 }
2379
2380 return rv;
2381}
2382
2383static void free_crypto(struct crypto *crypto)
2384{
2385 crypto_free_shash(crypto->cram_hmac_tfm);
2386 crypto_free_ahash(crypto->integrity_tfm);
2387 crypto_free_ahash(crypto->csums_tfm);
2388 crypto_free_ahash(crypto->verify_tfm);
2389}
2390
2391int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
2392{
2393 struct drbd_config_context adm_ctx;
2394 enum drbd_ret_code retcode;
2395 struct drbd_connection *connection;
2396 struct net_conf *old_net_conf, *new_net_conf = NULL;
2397 int err;
2398 int ovr;
2399 int rsr;
2400 struct crypto crypto = { };
2401
2402 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION);
2403 if (!adm_ctx.reply_skb)
2404 return retcode;
2405 if (retcode != NO_ERROR)
2406 goto finish;
2407
2408 connection = adm_ctx.connection;
2409 mutex_lock(&adm_ctx.resource->adm_mutex);
2410
2411 new_net_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
2412 if (!new_net_conf) {
2413 retcode = ERR_NOMEM;
2414 goto out;
2415 }
2416
2417 conn_reconfig_start(connection);
2418
2419 mutex_lock(&connection->data.mutex);
2420 mutex_lock(&connection->resource->conf_update);
2421 old_net_conf = connection->net_conf;
2422
2423 if (!old_net_conf) {
2424 drbd_msg_put_info(adm_ctx.reply_skb, "net conf missing, try connect");
2425 retcode = ERR_INVALID_REQUEST;
2426 goto fail;
2427 }
2428
2429 *new_net_conf = *old_net_conf;
2430 if (should_set_defaults(info))
2431 set_net_conf_defaults(new_net_conf);
2432
2433 err = net_conf_from_attrs_for_change(new_net_conf, info);
2434 if (err && err != -ENOMSG) {
2435 retcode = ERR_MANDATORY_TAG;
2436 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
2437 goto fail;
2438 }
2439
2440 retcode = check_net_options(connection, new_net_conf);
2441 if (retcode != NO_ERROR)
2442 goto fail;
2443
2444
2445 rsr = conn_resync_running(connection);
2446 if (rsr && strcmp(new_net_conf->csums_alg, old_net_conf->csums_alg)) {
2447 retcode = ERR_CSUMS_RESYNC_RUNNING;
2448 goto fail;
2449 }
2450
2451
2452 ovr = conn_ov_running(connection);
2453 if (ovr && strcmp(new_net_conf->verify_alg, old_net_conf->verify_alg)) {
2454 retcode = ERR_VERIFY_RUNNING;
2455 goto fail;
2456 }
2457
2458 retcode = alloc_crypto(&crypto, new_net_conf);
2459 if (retcode != NO_ERROR)
2460 goto fail;
2461
2462 rcu_assign_pointer(connection->net_conf, new_net_conf);
2463
2464 if (!rsr) {
2465 crypto_free_ahash(connection->csums_tfm);
2466 connection->csums_tfm = crypto.csums_tfm;
2467 crypto.csums_tfm = NULL;
2468 }
2469 if (!ovr) {
2470 crypto_free_ahash(connection->verify_tfm);
2471 connection->verify_tfm = crypto.verify_tfm;
2472 crypto.verify_tfm = NULL;
2473 }
2474
2475 crypto_free_ahash(connection->integrity_tfm);
2476 connection->integrity_tfm = crypto.integrity_tfm;
2477 if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)
2478
2479 __drbd_send_protocol(connection, P_PROTOCOL_UPDATE);
2480
2481 crypto_free_shash(connection->cram_hmac_tfm);
2482 connection->cram_hmac_tfm = crypto.cram_hmac_tfm;
2483
2484 mutex_unlock(&connection->resource->conf_update);
2485 mutex_unlock(&connection->data.mutex);
2486 synchronize_rcu();
2487 kfree(old_net_conf);
2488
2489 if (connection->cstate >= C_WF_REPORT_PARAMS) {
2490 struct drbd_peer_device *peer_device;
2491 int vnr;
2492
2493 idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
2494 drbd_send_sync_param(peer_device);
2495 }
2496
2497 goto done;
2498
2499 fail:
2500 mutex_unlock(&connection->resource->conf_update);
2501 mutex_unlock(&connection->data.mutex);
2502 free_crypto(&crypto);
2503 kfree(new_net_conf);
2504 done:
2505 conn_reconfig_done(connection);
2506 out:
2507 mutex_unlock(&adm_ctx.resource->adm_mutex);
2508 finish:
2509 drbd_adm_finish(&adm_ctx, info, retcode);
2510 return 0;
2511}
2512
2513static void connection_to_info(struct connection_info *info,
2514 struct drbd_connection *connection)
2515{
2516 info->conn_connection_state = connection->cstate;
2517 info->conn_role = conn_highest_peer(connection);
2518}
2519
2520static void peer_device_to_info(struct peer_device_info *info,
2521 struct drbd_peer_device *peer_device)
2522{
2523 struct drbd_device *device = peer_device->device;
2524
2525 info->peer_repl_state =
2526 max_t(enum drbd_conns, C_WF_REPORT_PARAMS, device->state.conn);
2527 info->peer_disk_state = device->state.pdsk;
2528 info->peer_resync_susp_user = device->state.user_isp;
2529 info->peer_resync_susp_peer = device->state.peer_isp;
2530 info->peer_resync_susp_dependency = device->state.aftr_isp;
2531}
2532
2533int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
2534{
2535 struct connection_info connection_info;
2536 enum drbd_notification_type flags;
2537 unsigned int peer_devices = 0;
2538 struct drbd_config_context adm_ctx;
2539 struct drbd_peer_device *peer_device;
2540 struct net_conf *old_net_conf, *new_net_conf = NULL;
2541 struct crypto crypto = { };
2542 struct drbd_resource *resource;
2543 struct drbd_connection *connection;
2544 enum drbd_ret_code retcode;
2545 int i;
2546 int err;
2547
2548 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
2549
2550 if (!adm_ctx.reply_skb)
2551 return retcode;
2552 if (retcode != NO_ERROR)
2553 goto out;
2554 if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) {
2555 drbd_msg_put_info(adm_ctx.reply_skb, "connection endpoint(s) missing");
2556 retcode = ERR_INVALID_REQUEST;
2557 goto out;
2558 }
2559
2560
2561
2562
2563 for_each_resource(resource, &drbd_resources) {
2564 for_each_connection(connection, resource) {
2565 if (nla_len(adm_ctx.my_addr) == connection->my_addr_len &&
2566 !memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr,
2567 connection->my_addr_len)) {
2568 retcode = ERR_LOCAL_ADDR;
2569 goto out;
2570 }
2571
2572 if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len &&
2573 !memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr,
2574 connection->peer_addr_len)) {
2575 retcode = ERR_PEER_ADDR;
2576 goto out;
2577 }
2578 }
2579 }
2580
2581 mutex_lock(&adm_ctx.resource->adm_mutex);
2582 connection = first_connection(adm_ctx.resource);
2583 conn_reconfig_start(connection);
2584
2585 if (connection->cstate > C_STANDALONE) {
2586 retcode = ERR_NET_CONFIGURED;
2587 goto fail;
2588 }
2589
2590
2591 new_net_conf = kzalloc(sizeof(*new_net_conf), GFP_KERNEL);
2592 if (!new_net_conf) {
2593 retcode = ERR_NOMEM;
2594 goto fail;
2595 }
2596
2597 set_net_conf_defaults(new_net_conf);
2598
2599 err = net_conf_from_attrs(new_net_conf, info);
2600 if (err && err != -ENOMSG) {
2601 retcode = ERR_MANDATORY_TAG;
2602 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
2603 goto fail;
2604 }
2605
2606 retcode = check_net_options(connection, new_net_conf);
2607 if (retcode != NO_ERROR)
2608 goto fail;
2609
2610 retcode = alloc_crypto(&crypto, new_net_conf);
2611 if (retcode != NO_ERROR)
2612 goto fail;
2613
2614 ((char *)new_net_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;
2615
2616 drbd_flush_workqueue(&connection->sender_work);
2617
2618 mutex_lock(&adm_ctx.resource->conf_update);
2619 old_net_conf = connection->net_conf;
2620 if (old_net_conf) {
2621 retcode = ERR_NET_CONFIGURED;
2622 mutex_unlock(&adm_ctx.resource->conf_update);
2623 goto fail;
2624 }
2625 rcu_assign_pointer(connection->net_conf, new_net_conf);
2626
2627 conn_free_crypto(connection);
2628 connection->cram_hmac_tfm = crypto.cram_hmac_tfm;
2629 connection->integrity_tfm = crypto.integrity_tfm;
2630 connection->csums_tfm = crypto.csums_tfm;
2631 connection->verify_tfm = crypto.verify_tfm;
2632
2633 connection->my_addr_len = nla_len(adm_ctx.my_addr);
2634 memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len);
2635 connection->peer_addr_len = nla_len(adm_ctx.peer_addr);
2636 memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len);
2637
2638 idr_for_each_entry(&connection->peer_devices, peer_device, i) {
2639 peer_devices++;
2640 }
2641
2642 connection_to_info(&connection_info, connection);
2643 flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
2644 mutex_lock(¬ification_mutex);
2645 notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags);
2646 idr_for_each_entry(&connection->peer_devices, peer_device, i) {
2647 struct peer_device_info peer_device_info;
2648
2649 peer_device_to_info(&peer_device_info, peer_device);
2650 flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
2651 notify_peer_device_state(NULL, 0, peer_device, &peer_device_info, NOTIFY_CREATE | flags);
2652 }
2653 mutex_unlock(¬ification_mutex);
2654 mutex_unlock(&adm_ctx.resource->conf_update);
2655
2656 rcu_read_lock();
2657 idr_for_each_entry(&connection->peer_devices, peer_device, i) {
2658 struct drbd_device *device = peer_device->device;
2659 device->send_cnt = 0;
2660 device->recv_cnt = 0;
2661 }
2662 rcu_read_unlock();
2663
2664 retcode = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE);
2665
2666 conn_reconfig_done(connection);
2667 mutex_unlock(&adm_ctx.resource->adm_mutex);
2668 drbd_adm_finish(&adm_ctx, info, retcode);
2669 return 0;
2670
2671fail:
2672 free_crypto(&crypto);
2673 kfree(new_net_conf);
2674
2675 conn_reconfig_done(connection);
2676 mutex_unlock(&adm_ctx.resource->adm_mutex);
2677out:
2678 drbd_adm_finish(&adm_ctx, info, retcode);
2679 return 0;
2680}
2681
2682static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force)
2683{
2684 enum drbd_state_rv rv;
2685
2686 rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),
2687 force ? CS_HARD : 0);
2688
2689 switch (rv) {
2690 case SS_NOTHING_TO_DO:
2691 break;
2692 case SS_ALREADY_STANDALONE:
2693 return SS_SUCCESS;
2694 case SS_PRIMARY_NOP:
2695
2696 rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0);
2697
2698 if (rv == SS_OUTDATE_WO_CONN)
2699 rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE);
2700
2701 break;
2702 case SS_CW_FAILED_BY_PEER:
2703
2704 rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING,
2705 disk, D_OUTDATED), 0);
2706 if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) {
2707 rv = conn_request_state(connection, NS(conn, C_DISCONNECTING),
2708 CS_HARD);
2709 }
2710 break;
2711 default:;
2712
2713 }
2714
2715 if (rv >= SS_SUCCESS) {
2716 enum drbd_state_rv rv2;
2717
2718
2719
2720
2721 drbd_thread_stop(&connection->receiver);
2722
2723
2724
2725
2726
2727
2728
2729 rv2 = conn_request_state(connection, NS(conn, C_STANDALONE),
2730 CS_VERBOSE | CS_HARD);
2731 if (rv2 < SS_SUCCESS)
2732 drbd_err(connection,
2733 "unexpected rv2=%d in conn_try_disconnect()\n",
2734 rv2);
2735
2736
2737 }
2738 return rv;
2739}
2740
2741int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info)
2742{
2743 struct drbd_config_context adm_ctx;
2744 struct disconnect_parms parms;
2745 struct drbd_connection *connection;
2746 enum drbd_state_rv rv;
2747 enum drbd_ret_code retcode;
2748 int err;
2749
2750 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION);
2751 if (!adm_ctx.reply_skb)
2752 return retcode;
2753 if (retcode != NO_ERROR)
2754 goto fail;
2755
2756 connection = adm_ctx.connection;
2757 memset(&parms, 0, sizeof(parms));
2758 if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) {
2759 err = disconnect_parms_from_attrs(&parms, info);
2760 if (err) {
2761 retcode = ERR_MANDATORY_TAG;
2762 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
2763 goto fail;
2764 }
2765 }
2766
2767 mutex_lock(&adm_ctx.resource->adm_mutex);
2768 rv = conn_try_disconnect(connection, parms.force_disconnect);
2769 if (rv < SS_SUCCESS)
2770 retcode = rv;
2771 else
2772 retcode = NO_ERROR;
2773 mutex_unlock(&adm_ctx.resource->adm_mutex);
2774 fail:
2775 drbd_adm_finish(&adm_ctx, info, retcode);
2776 return 0;
2777}
2778
2779void resync_after_online_grow(struct drbd_device *device)
2780{
2781 int iass;
2782
2783 drbd_info(device, "Resync of new storage after online grow\n");
2784 if (device->state.role != device->state.peer)
2785 iass = (device->state.role == R_PRIMARY);
2786 else
2787 iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags);
2788
2789 if (iass)
2790 drbd_start_resync(device, C_SYNC_SOURCE);
2791 else
2792 _drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE);
2793}
2794
2795int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info)
2796{
2797 struct drbd_config_context adm_ctx;
2798 struct disk_conf *old_disk_conf, *new_disk_conf = NULL;
2799 struct resize_parms rs;
2800 struct drbd_device *device;
2801 enum drbd_ret_code retcode;
2802 enum determine_dev_size dd;
2803 bool change_al_layout = false;
2804 enum dds_flags ddsf;
2805 sector_t u_size;
2806 int err;
2807
2808 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
2809 if (!adm_ctx.reply_skb)
2810 return retcode;
2811 if (retcode != NO_ERROR)
2812 goto finish;
2813
2814 mutex_lock(&adm_ctx.resource->adm_mutex);
2815 device = adm_ctx.device;
2816 if (!get_ldev(device)) {
2817 retcode = ERR_NO_DISK;
2818 goto fail;
2819 }
2820
2821 memset(&rs, 0, sizeof(struct resize_parms));
2822 rs.al_stripes = device->ldev->md.al_stripes;
2823 rs.al_stripe_size = device->ldev->md.al_stripe_size_4k * 4;
2824 if (info->attrs[DRBD_NLA_RESIZE_PARMS]) {
2825 err = resize_parms_from_attrs(&rs, info);
2826 if (err) {
2827 retcode = ERR_MANDATORY_TAG;
2828 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
2829 goto fail_ldev;
2830 }
2831 }
2832
2833 if (device->state.conn > C_CONNECTED) {
2834 retcode = ERR_RESIZE_RESYNC;
2835 goto fail_ldev;
2836 }
2837
2838 if (device->state.role == R_SECONDARY &&
2839 device->state.peer == R_SECONDARY) {
2840 retcode = ERR_NO_PRIMARY;
2841 goto fail_ldev;
2842 }
2843
2844 if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) {
2845 retcode = ERR_NEED_APV_93;
2846 goto fail_ldev;
2847 }
2848
2849 rcu_read_lock();
2850 u_size = rcu_dereference(device->ldev->disk_conf)->disk_size;
2851 rcu_read_unlock();
2852 if (u_size != (sector_t)rs.resize_size) {
2853 new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
2854 if (!new_disk_conf) {
2855 retcode = ERR_NOMEM;
2856 goto fail_ldev;
2857 }
2858 }
2859
2860 if (device->ldev->md.al_stripes != rs.al_stripes ||
2861 device->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) {
2862 u32 al_size_k = rs.al_stripes * rs.al_stripe_size;
2863
2864 if (al_size_k > (16 * 1024 * 1024)) {
2865 retcode = ERR_MD_LAYOUT_TOO_BIG;
2866 goto fail_ldev;
2867 }
2868
2869 if (al_size_k < MD_32kB_SECT/2) {
2870 retcode = ERR_MD_LAYOUT_TOO_SMALL;
2871 goto fail_ldev;
2872 }
2873
2874 if (device->state.conn != C_CONNECTED && !rs.resize_force) {
2875 retcode = ERR_MD_LAYOUT_CONNECTED;
2876 goto fail_ldev;
2877 }
2878
2879 change_al_layout = true;
2880 }
2881
2882 if (device->ldev->known_size != drbd_get_capacity(device->ldev->backing_bdev))
2883 device->ldev->known_size = drbd_get_capacity(device->ldev->backing_bdev);
2884
2885 if (new_disk_conf) {
2886 mutex_lock(&device->resource->conf_update);
2887 old_disk_conf = device->ldev->disk_conf;
2888 *new_disk_conf = *old_disk_conf;
2889 new_disk_conf->disk_size = (sector_t)rs.resize_size;
2890 rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf);
2891 mutex_unlock(&device->resource->conf_update);
2892 synchronize_rcu();
2893 kfree(old_disk_conf);
2894 new_disk_conf = NULL;
2895 }
2896
2897 ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0);
2898 dd = drbd_determine_dev_size(device, ddsf, change_al_layout ? &rs : NULL);
2899 drbd_md_sync(device);
2900 put_ldev(device);
2901 if (dd == DS_ERROR) {
2902 retcode = ERR_NOMEM_BITMAP;
2903 goto fail;
2904 } else if (dd == DS_ERROR_SPACE_MD) {
2905 retcode = ERR_MD_LAYOUT_NO_FIT;
2906 goto fail;
2907 } else if (dd == DS_ERROR_SHRINK) {
2908 retcode = ERR_IMPLICIT_SHRINK;
2909 goto fail;
2910 }
2911
2912 if (device->state.conn == C_CONNECTED) {
2913 if (dd == DS_GREW)
2914 set_bit(RESIZE_PENDING, &device->flags);
2915
2916 drbd_send_uuids(first_peer_device(device));
2917 drbd_send_sizes(first_peer_device(device), 1, ddsf);
2918 }
2919
2920 fail:
2921 mutex_unlock(&adm_ctx.resource->adm_mutex);
2922 finish:
2923 drbd_adm_finish(&adm_ctx, info, retcode);
2924 return 0;
2925
2926 fail_ldev:
2927 put_ldev(device);
2928 kfree(new_disk_conf);
2929 goto fail;
2930}
2931
2932int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
2933{
2934 struct drbd_config_context adm_ctx;
2935 enum drbd_ret_code retcode;
2936 struct res_opts res_opts;
2937 int err;
2938
2939 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
2940 if (!adm_ctx.reply_skb)
2941 return retcode;
2942 if (retcode != NO_ERROR)
2943 goto fail;
2944
2945 res_opts = adm_ctx.resource->res_opts;
2946 if (should_set_defaults(info))
2947 set_res_opts_defaults(&res_opts);
2948
2949 err = res_opts_from_attrs(&res_opts, info);
2950 if (err && err != -ENOMSG) {
2951 retcode = ERR_MANDATORY_TAG;
2952 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
2953 goto fail;
2954 }
2955
2956 mutex_lock(&adm_ctx.resource->adm_mutex);
2957 err = set_resource_options(adm_ctx.resource, &res_opts);
2958 if (err) {
2959 retcode = ERR_INVALID_REQUEST;
2960 if (err == -ENOMEM)
2961 retcode = ERR_NOMEM;
2962 }
2963 mutex_unlock(&adm_ctx.resource->adm_mutex);
2964
2965fail:
2966 drbd_adm_finish(&adm_ctx, info, retcode);
2967 return 0;
2968}
2969
2970int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info)
2971{
2972 struct drbd_config_context adm_ctx;
2973 struct drbd_device *device;
2974 int retcode;
2975
2976 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
2977 if (!adm_ctx.reply_skb)
2978 return retcode;
2979 if (retcode != NO_ERROR)
2980 goto out;
2981
2982 device = adm_ctx.device;
2983 if (!get_ldev(device)) {
2984 retcode = ERR_NO_DISK;
2985 goto out;
2986 }
2987
2988 mutex_lock(&adm_ctx.resource->adm_mutex);
2989
2990
2991
2992
2993 drbd_suspend_io(device);
2994 wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
2995 drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);
2996
2997
2998
2999
3000
3001 if (device->state.conn == C_STANDALONE && device->state.role == R_SECONDARY) {
3002 retcode = drbd_request_state(device, NS(disk, D_INCONSISTENT));
3003 if (retcode >= SS_SUCCESS) {
3004 if (drbd_bitmap_io(device, &drbd_bmio_set_n_write,
3005 "set_n_write from invalidate", BM_LOCKED_MASK))
3006 retcode = ERR_IO_MD_DISK;
3007 }
3008 } else
3009 retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_T));
3010 drbd_resume_io(device);
3011 mutex_unlock(&adm_ctx.resource->adm_mutex);
3012 put_ldev(device);
3013out:
3014 drbd_adm_finish(&adm_ctx, info, retcode);
3015 return 0;
3016}
3017
3018static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info,
3019 union drbd_state mask, union drbd_state val)
3020{
3021 struct drbd_config_context adm_ctx;
3022 enum drbd_ret_code retcode;
3023
3024 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
3025 if (!adm_ctx.reply_skb)
3026 return retcode;
3027 if (retcode != NO_ERROR)
3028 goto out;
3029
3030 mutex_lock(&adm_ctx.resource->adm_mutex);
3031 retcode = drbd_request_state(adm_ctx.device, mask, val);
3032 mutex_unlock(&adm_ctx.resource->adm_mutex);
3033out:
3034 drbd_adm_finish(&adm_ctx, info, retcode);
3035 return 0;
3036}
3037
3038static int drbd_bmio_set_susp_al(struct drbd_device *device) __must_hold(local)
3039{
3040 int rv;
3041
3042 rv = drbd_bmio_set_n_write(device);
3043 drbd_suspend_al(device);
3044 return rv;
3045}
3046
3047int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info)
3048{
3049 struct drbd_config_context adm_ctx;
3050 int retcode;
3051 struct drbd_device *device;
3052
3053 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
3054 if (!adm_ctx.reply_skb)
3055 return retcode;
3056 if (retcode != NO_ERROR)
3057 goto out;
3058
3059 device = adm_ctx.device;
3060 if (!get_ldev(device)) {
3061 retcode = ERR_NO_DISK;
3062 goto out;
3063 }
3064
3065 mutex_lock(&adm_ctx.resource->adm_mutex);
3066
3067
3068
3069
3070 drbd_suspend_io(device);
3071 wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
3072 drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work);
3073
3074
3075
3076
3077
3078 if (device->state.conn == C_STANDALONE && device->state.role == R_PRIMARY) {
3079
3080
3081 retcode = drbd_request_state(device, NS(pdsk, D_INCONSISTENT));
3082 if (retcode >= SS_SUCCESS) {
3083 if (drbd_bitmap_io(device, &drbd_bmio_set_susp_al,
3084 "set_n_write from invalidate_peer",
3085 BM_LOCKED_SET_ALLOWED))
3086 retcode = ERR_IO_MD_DISK;
3087 }
3088 } else
3089 retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_S));
3090 drbd_resume_io(device);
3091 mutex_unlock(&adm_ctx.resource->adm_mutex);
3092 put_ldev(device);
3093out:
3094 drbd_adm_finish(&adm_ctx, info, retcode);
3095 return 0;
3096}
3097
3098int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info)
3099{
3100 struct drbd_config_context adm_ctx;
3101 enum drbd_ret_code retcode;
3102
3103 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
3104 if (!adm_ctx.reply_skb)
3105 return retcode;
3106 if (retcode != NO_ERROR)
3107 goto out;
3108
3109 mutex_lock(&adm_ctx.resource->adm_mutex);
3110 if (drbd_request_state(adm_ctx.device, NS(user_isp, 1)) == SS_NOTHING_TO_DO)
3111 retcode = ERR_PAUSE_IS_SET;
3112 mutex_unlock(&adm_ctx.resource->adm_mutex);
3113out:
3114 drbd_adm_finish(&adm_ctx, info, retcode);
3115 return 0;
3116}
3117
3118int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info)
3119{
3120 struct drbd_config_context adm_ctx;
3121 union drbd_dev_state s;
3122 enum drbd_ret_code retcode;
3123
3124 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
3125 if (!adm_ctx.reply_skb)
3126 return retcode;
3127 if (retcode != NO_ERROR)
3128 goto out;
3129
3130 mutex_lock(&adm_ctx.resource->adm_mutex);
3131 if (drbd_request_state(adm_ctx.device, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
3132 s = adm_ctx.device->state;
3133 if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) {
3134 retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP :
3135 s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR;
3136 } else {
3137 retcode = ERR_PAUSE_IS_CLEAR;
3138 }
3139 }
3140 mutex_unlock(&adm_ctx.resource->adm_mutex);
3141out:
3142 drbd_adm_finish(&adm_ctx, info, retcode);
3143 return 0;
3144}
3145
3146int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info)
3147{
3148 return drbd_adm_simple_request_state(skb, info, NS(susp, 1));
3149}
3150
3151int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info)
3152{
3153 struct drbd_config_context adm_ctx;
3154 struct drbd_device *device;
3155 int retcode;
3156
3157 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
3158 if (!adm_ctx.reply_skb)
3159 return retcode;
3160 if (retcode != NO_ERROR)
3161 goto out;
3162
3163 mutex_lock(&adm_ctx.resource->adm_mutex);
3164 device = adm_ctx.device;
3165 if (test_bit(NEW_CUR_UUID, &device->flags)) {
3166 if (get_ldev_if_state(device, D_ATTACHING)) {
3167 drbd_uuid_new_current(device);
3168 put_ldev(device);
3169 } else {
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185 u64 val;
3186 get_random_bytes(&val, sizeof(u64));
3187 drbd_set_ed_uuid(device, val);
3188 drbd_warn(device, "Resumed without access to data; please tear down before attempting to re-configure.\n");
3189 }
3190 clear_bit(NEW_CUR_UUID, &device->flags);
3191 }
3192 drbd_suspend_io(device);
3193 retcode = drbd_request_state(device, NS3(susp, 0, susp_nod, 0, susp_fen, 0));
3194 if (retcode == SS_SUCCESS) {
3195 if (device->state.conn < C_CONNECTED)
3196 tl_clear(first_peer_device(device)->connection);
3197 if (device->state.disk == D_DISKLESS || device->state.disk == D_FAILED)
3198 tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO);
3199 }
3200 drbd_resume_io(device);
3201 mutex_unlock(&adm_ctx.resource->adm_mutex);
3202out:
3203 drbd_adm_finish(&adm_ctx, info, retcode);
3204 return 0;
3205}
3206
3207int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info)
3208{
3209 return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED));
3210}
3211
3212static int nla_put_drbd_cfg_context(struct sk_buff *skb,
3213 struct drbd_resource *resource,
3214 struct drbd_connection *connection,
3215 struct drbd_device *device)
3216{
3217 struct nlattr *nla;
3218 nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT);
3219 if (!nla)
3220 goto nla_put_failure;
3221 if (device &&
3222 nla_put_u32(skb, T_ctx_volume, device->vnr))
3223 goto nla_put_failure;
3224 if (nla_put_string(skb, T_ctx_resource_name, resource->name))
3225 goto nla_put_failure;
3226 if (connection) {
3227 if (connection->my_addr_len &&
3228 nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr))
3229 goto nla_put_failure;
3230 if (connection->peer_addr_len &&
3231 nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr))
3232 goto nla_put_failure;
3233 }
3234 nla_nest_end(skb, nla);
3235 return 0;
3236
3237nla_put_failure:
3238 if (nla)
3239 nla_nest_cancel(skb, nla);
3240 return -EMSGSIZE;
3241}
3242
3243
3244
3245
3246
3247
3248static struct nlattr *find_cfg_context_attr(const struct nlmsghdr *nlh, int attr)
3249{
3250 const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ;
3251 const int maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1;
3252 struct nlattr *nla;
3253
3254 nla = nla_find(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen),
3255 DRBD_NLA_CFG_CONTEXT);
3256 if (!nla)
3257 return NULL;
3258 return drbd_nla_find_nested(maxtype, nla, __nla_type(attr));
3259}
3260
3261static void resource_to_info(struct resource_info *, struct drbd_resource *);
3262
3263int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb)
3264{
3265 struct drbd_genlmsghdr *dh;
3266 struct drbd_resource *resource;
3267 struct resource_info resource_info;
3268 struct resource_statistics resource_statistics;
3269 int err;
3270
3271 rcu_read_lock();
3272 if (cb->args[0]) {
3273 for_each_resource_rcu(resource, &drbd_resources)
3274 if (resource == (struct drbd_resource *)cb->args[0])
3275 goto found_resource;
3276 err = 0;
3277 goto out;
3278 }
3279 resource = list_entry(&drbd_resources,
3280 struct drbd_resource, resources);
3281
3282found_resource:
3283 list_for_each_entry_continue_rcu(resource, &drbd_resources, resources) {
3284 goto put_result;
3285 }
3286 err = 0;
3287 goto out;
3288
3289put_result:
3290 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3291 cb->nlh->nlmsg_seq, &drbd_genl_family,
3292 NLM_F_MULTI, DRBD_ADM_GET_RESOURCES);
3293 err = -ENOMEM;
3294 if (!dh)
3295 goto out;
3296 dh->minor = -1U;
3297 dh->ret_code = NO_ERROR;
3298 err = nla_put_drbd_cfg_context(skb, resource, NULL, NULL);
3299 if (err)
3300 goto out;
3301 err = res_opts_to_skb(skb, &resource->res_opts, !capable(CAP_SYS_ADMIN));
3302 if (err)
3303 goto out;
3304 resource_to_info(&resource_info, resource);
3305 err = resource_info_to_skb(skb, &resource_info, !capable(CAP_SYS_ADMIN));
3306 if (err)
3307 goto out;
3308 resource_statistics.res_stat_write_ordering = resource->write_ordering;
3309 err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN));
3310 if (err)
3311 goto out;
3312 cb->args[0] = (long)resource;
3313 genlmsg_end(skb, dh);
3314 err = 0;
3315
3316out:
3317 rcu_read_unlock();
3318 if (err)
3319 return err;
3320 return skb->len;
3321}
3322
3323static void device_to_statistics(struct device_statistics *s,
3324 struct drbd_device *device)
3325{
3326 memset(s, 0, sizeof(*s));
3327 s->dev_upper_blocked = !may_inc_ap_bio(device);
3328 if (get_ldev(device)) {
3329 struct drbd_md *md = &device->ldev->md;
3330 u64 *history_uuids = (u64 *)s->history_uuids;
3331 struct request_queue *q;
3332 int n;
3333
3334 spin_lock_irq(&md->uuid_lock);
3335 s->dev_current_uuid = md->uuid[UI_CURRENT];
3336 BUILD_BUG_ON(sizeof(s->history_uuids) < UI_HISTORY_END - UI_HISTORY_START + 1);
3337 for (n = 0; n < UI_HISTORY_END - UI_HISTORY_START + 1; n++)
3338 history_uuids[n] = md->uuid[UI_HISTORY_START + n];
3339 for (; n < HISTORY_UUIDS; n++)
3340 history_uuids[n] = 0;
3341 s->history_uuids_len = HISTORY_UUIDS;
3342 spin_unlock_irq(&md->uuid_lock);
3343
3344 s->dev_disk_flags = md->flags;
3345 q = bdev_get_queue(device->ldev->backing_bdev);
3346 s->dev_lower_blocked =
3347 bdi_congested(q->backing_dev_info,
3348 (1 << WB_async_congested) |
3349 (1 << WB_sync_congested));
3350 put_ldev(device);
3351 }
3352 s->dev_size = drbd_get_capacity(device->this_bdev);
3353 s->dev_read = device->read_cnt;
3354 s->dev_write = device->writ_cnt;
3355 s->dev_al_writes = device->al_writ_cnt;
3356 s->dev_bm_writes = device->bm_writ_cnt;
3357 s->dev_upper_pending = atomic_read(&device->ap_bio_cnt);
3358 s->dev_lower_pending = atomic_read(&device->local_cnt);
3359 s->dev_al_suspended = test_bit(AL_SUSPENDED, &device->flags);
3360 s->dev_exposed_data_uuid = device->ed_uuid;
3361}
3362
3363static int put_resource_in_arg0(struct netlink_callback *cb, int holder_nr)
3364{
3365 if (cb->args[0]) {
3366 struct drbd_resource *resource =
3367 (struct drbd_resource *)cb->args[0];
3368 kref_put(&resource->kref, drbd_destroy_resource);
3369 }
3370
3371 return 0;
3372}
3373
3374int drbd_adm_dump_devices_done(struct netlink_callback *cb) {
3375 return put_resource_in_arg0(cb, 7);
3376}
3377
3378static void device_to_info(struct device_info *, struct drbd_device *);
3379
3380int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb)
3381{
3382 struct nlattr *resource_filter;
3383 struct drbd_resource *resource;
3384 struct drbd_device *uninitialized_var(device);
3385 int minor, err, retcode;
3386 struct drbd_genlmsghdr *dh;
3387 struct device_info device_info;
3388 struct device_statistics device_statistics;
3389 struct idr *idr_to_search;
3390
3391 resource = (struct drbd_resource *)cb->args[0];
3392 if (!cb->args[0] && !cb->args[1]) {
3393 resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name);
3394 if (resource_filter) {
3395 retcode = ERR_RES_NOT_KNOWN;
3396 resource = drbd_find_resource(nla_data(resource_filter));
3397 if (!resource)
3398 goto put_result;
3399 cb->args[0] = (long)resource;
3400 }
3401 }
3402
3403 rcu_read_lock();
3404 minor = cb->args[1];
3405 idr_to_search = resource ? &resource->devices : &drbd_devices;
3406 device = idr_get_next(idr_to_search, &minor);
3407 if (!device) {
3408 err = 0;
3409 goto out;
3410 }
3411 idr_for_each_entry_continue(idr_to_search, device, minor) {
3412 retcode = NO_ERROR;
3413 goto put_result;
3414 }
3415 err = 0;
3416 goto out;
3417
3418put_result:
3419 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3420 cb->nlh->nlmsg_seq, &drbd_genl_family,
3421 NLM_F_MULTI, DRBD_ADM_GET_DEVICES);
3422 err = -ENOMEM;
3423 if (!dh)
3424 goto out;
3425 dh->ret_code = retcode;
3426 dh->minor = -1U;
3427 if (retcode == NO_ERROR) {
3428 dh->minor = device->minor;
3429 err = nla_put_drbd_cfg_context(skb, device->resource, NULL, device);
3430 if (err)
3431 goto out;
3432 if (get_ldev(device)) {
3433 struct disk_conf *disk_conf =
3434 rcu_dereference(device->ldev->disk_conf);
3435
3436 err = disk_conf_to_skb(skb, disk_conf, !capable(CAP_SYS_ADMIN));
3437 put_ldev(device);
3438 if (err)
3439 goto out;
3440 }
3441 device_to_info(&device_info, device);
3442 err = device_info_to_skb(skb, &device_info, !capable(CAP_SYS_ADMIN));
3443 if (err)
3444 goto out;
3445
3446 device_to_statistics(&device_statistics, device);
3447 err = device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN));
3448 if (err)
3449 goto out;
3450 cb->args[1] = minor + 1;
3451 }
3452 genlmsg_end(skb, dh);
3453 err = 0;
3454
3455out:
3456 rcu_read_unlock();
3457 if (err)
3458 return err;
3459 return skb->len;
3460}
3461
3462int drbd_adm_dump_connections_done(struct netlink_callback *cb)
3463{
3464 return put_resource_in_arg0(cb, 6);
3465}
3466
3467enum { SINGLE_RESOURCE, ITERATE_RESOURCES };
3468
3469int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb)
3470{
3471 struct nlattr *resource_filter;
3472 struct drbd_resource *resource = NULL, *next_resource;
3473 struct drbd_connection *uninitialized_var(connection);
3474 int err = 0, retcode;
3475 struct drbd_genlmsghdr *dh;
3476 struct connection_info connection_info;
3477 struct connection_statistics connection_statistics;
3478
3479 rcu_read_lock();
3480 resource = (struct drbd_resource *)cb->args[0];
3481 if (!cb->args[0]) {
3482 resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name);
3483 if (resource_filter) {
3484 retcode = ERR_RES_NOT_KNOWN;
3485 resource = drbd_find_resource(nla_data(resource_filter));
3486 if (!resource)
3487 goto put_result;
3488 cb->args[0] = (long)resource;
3489 cb->args[1] = SINGLE_RESOURCE;
3490 }
3491 }
3492 if (!resource) {
3493 if (list_empty(&drbd_resources))
3494 goto out;
3495 resource = list_first_entry(&drbd_resources, struct drbd_resource, resources);
3496 kref_get(&resource->kref);
3497 cb->args[0] = (long)resource;
3498 cb->args[1] = ITERATE_RESOURCES;
3499 }
3500
3501 next_resource:
3502 rcu_read_unlock();
3503 mutex_lock(&resource->conf_update);
3504 rcu_read_lock();
3505 if (cb->args[2]) {
3506 for_each_connection_rcu(connection, resource)
3507 if (connection == (struct drbd_connection *)cb->args[2])
3508 goto found_connection;
3509
3510 goto no_more_connections;
3511 }
3512 connection = list_entry(&resource->connections, struct drbd_connection, connections);
3513
3514found_connection:
3515 list_for_each_entry_continue_rcu(connection, &resource->connections, connections) {
3516 if (!has_net_conf(connection))
3517 continue;
3518 retcode = NO_ERROR;
3519 goto put_result;
3520 }
3521
3522no_more_connections:
3523 if (cb->args[1] == ITERATE_RESOURCES) {
3524 for_each_resource_rcu(next_resource, &drbd_resources) {
3525 if (next_resource == resource)
3526 goto found_resource;
3527 }
3528
3529 }
3530 goto out;
3531
3532found_resource:
3533 list_for_each_entry_continue_rcu(next_resource, &drbd_resources, resources) {
3534 mutex_unlock(&resource->conf_update);
3535 kref_put(&resource->kref, drbd_destroy_resource);
3536 resource = next_resource;
3537 kref_get(&resource->kref);
3538 cb->args[0] = (long)resource;
3539 cb->args[2] = 0;
3540 goto next_resource;
3541 }
3542 goto out;
3543
3544put_result:
3545 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3546 cb->nlh->nlmsg_seq, &drbd_genl_family,
3547 NLM_F_MULTI, DRBD_ADM_GET_CONNECTIONS);
3548 err = -ENOMEM;
3549 if (!dh)
3550 goto out;
3551 dh->ret_code = retcode;
3552 dh->minor = -1U;
3553 if (retcode == NO_ERROR) {
3554 struct net_conf *net_conf;
3555
3556 err = nla_put_drbd_cfg_context(skb, resource, connection, NULL);
3557 if (err)
3558 goto out;
3559 net_conf = rcu_dereference(connection->net_conf);
3560 if (net_conf) {
3561 err = net_conf_to_skb(skb, net_conf, !capable(CAP_SYS_ADMIN));
3562 if (err)
3563 goto out;
3564 }
3565 connection_to_info(&connection_info, connection);
3566 err = connection_info_to_skb(skb, &connection_info, !capable(CAP_SYS_ADMIN));
3567 if (err)
3568 goto out;
3569 connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);
3570 err = connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN));
3571 if (err)
3572 goto out;
3573 cb->args[2] = (long)connection;
3574 }
3575 genlmsg_end(skb, dh);
3576 err = 0;
3577
3578out:
3579 rcu_read_unlock();
3580 if (resource)
3581 mutex_unlock(&resource->conf_update);
3582 if (err)
3583 return err;
3584 return skb->len;
3585}
3586
3587enum mdf_peer_flag {
3588 MDF_PEER_CONNECTED = 1 << 0,
3589 MDF_PEER_OUTDATED = 1 << 1,
3590 MDF_PEER_FENCING = 1 << 2,
3591 MDF_PEER_FULL_SYNC = 1 << 3,
3592};
3593
3594static void peer_device_to_statistics(struct peer_device_statistics *s,
3595 struct drbd_peer_device *peer_device)
3596{
3597 struct drbd_device *device = peer_device->device;
3598
3599 memset(s, 0, sizeof(*s));
3600 s->peer_dev_received = device->recv_cnt;
3601 s->peer_dev_sent = device->send_cnt;
3602 s->peer_dev_pending = atomic_read(&device->ap_pending_cnt) +
3603 atomic_read(&device->rs_pending_cnt);
3604 s->peer_dev_unacked = atomic_read(&device->unacked_cnt);
3605 s->peer_dev_out_of_sync = drbd_bm_total_weight(device) << (BM_BLOCK_SHIFT - 9);
3606 s->peer_dev_resync_failed = device->rs_failed << (BM_BLOCK_SHIFT - 9);
3607 if (get_ldev(device)) {
3608 struct drbd_md *md = &device->ldev->md;
3609
3610 spin_lock_irq(&md->uuid_lock);
3611 s->peer_dev_bitmap_uuid = md->uuid[UI_BITMAP];
3612 spin_unlock_irq(&md->uuid_lock);
3613 s->peer_dev_flags =
3614 (drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND) ?
3615 MDF_PEER_CONNECTED : 0) +
3616 (drbd_md_test_flag(device->ldev, MDF_CONSISTENT) &&
3617 !drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE) ?
3618 MDF_PEER_OUTDATED : 0) +
3619
3620 (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) ?
3621 MDF_PEER_FULL_SYNC : 0);
3622 put_ldev(device);
3623 }
3624}
3625
3626int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb)
3627{
3628 return put_resource_in_arg0(cb, 9);
3629}
3630
3631int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb)
3632{
3633 struct nlattr *resource_filter;
3634 struct drbd_resource *resource;
3635 struct drbd_device *uninitialized_var(device);
3636 struct drbd_peer_device *peer_device = NULL;
3637 int minor, err, retcode;
3638 struct drbd_genlmsghdr *dh;
3639 struct idr *idr_to_search;
3640
3641 resource = (struct drbd_resource *)cb->args[0];
3642 if (!cb->args[0] && !cb->args[1]) {
3643 resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name);
3644 if (resource_filter) {
3645 retcode = ERR_RES_NOT_KNOWN;
3646 resource = drbd_find_resource(nla_data(resource_filter));
3647 if (!resource)
3648 goto put_result;
3649 }
3650 cb->args[0] = (long)resource;
3651 }
3652
3653 rcu_read_lock();
3654 minor = cb->args[1];
3655 idr_to_search = resource ? &resource->devices : &drbd_devices;
3656 device = idr_find(idr_to_search, minor);
3657 if (!device) {
3658next_device:
3659 minor++;
3660 cb->args[2] = 0;
3661 device = idr_get_next(idr_to_search, &minor);
3662 if (!device) {
3663 err = 0;
3664 goto out;
3665 }
3666 }
3667 if (cb->args[2]) {
3668 for_each_peer_device(peer_device, device)
3669 if (peer_device == (struct drbd_peer_device *)cb->args[2])
3670 goto found_peer_device;
3671
3672 goto next_device;
3673 }
3674
3675 peer_device = list_entry(&device->peer_devices, struct drbd_peer_device, peer_devices);
3676
3677found_peer_device:
3678 list_for_each_entry_continue_rcu(peer_device, &device->peer_devices, peer_devices) {
3679 if (!has_net_conf(peer_device->connection))
3680 continue;
3681 retcode = NO_ERROR;
3682 goto put_result;
3683 }
3684 goto next_device;
3685
3686put_result:
3687 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3688 cb->nlh->nlmsg_seq, &drbd_genl_family,
3689 NLM_F_MULTI, DRBD_ADM_GET_PEER_DEVICES);
3690 err = -ENOMEM;
3691 if (!dh)
3692 goto out;
3693 dh->ret_code = retcode;
3694 dh->minor = -1U;
3695 if (retcode == NO_ERROR) {
3696 struct peer_device_info peer_device_info;
3697 struct peer_device_statistics peer_device_statistics;
3698
3699 dh->minor = minor;
3700 err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device);
3701 if (err)
3702 goto out;
3703 peer_device_to_info(&peer_device_info, peer_device);
3704 err = peer_device_info_to_skb(skb, &peer_device_info, !capable(CAP_SYS_ADMIN));
3705 if (err)
3706 goto out;
3707 peer_device_to_statistics(&peer_device_statistics, peer_device);
3708 err = peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN));
3709 if (err)
3710 goto out;
3711 cb->args[1] = minor;
3712 cb->args[2] = (long)peer_device;
3713 }
3714 genlmsg_end(skb, dh);
3715 err = 0;
3716
3717out:
3718 rcu_read_unlock();
3719 if (err)
3720 return err;
3721 return skb->len;
3722}
3723
3724
3725
3726static struct drbd_connection *the_only_connection(struct drbd_resource *resource)
3727{
3728 struct list_head *connections = &resource->connections;
3729
3730 if (list_empty(connections) || connections->next->next != connections)
3731 return NULL;
3732 return list_first_entry(&resource->connections, struct drbd_connection, connections);
3733}
3734
3735static int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device,
3736 const struct sib_info *sib)
3737{
3738 struct drbd_resource *resource = device->resource;
3739 struct state_info *si = NULL;
3740 struct nlattr *nla;
3741 int got_ldev;
3742 int err = 0;
3743 int exclude_sensitive;
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756 exclude_sensitive = sib || !capable(CAP_SYS_ADMIN);
3757
3758 got_ldev = get_ldev(device);
3759
3760
3761
3762 if (nla_put_drbd_cfg_context(skb, resource, the_only_connection(resource), device))
3763 goto nla_put_failure;
3764
3765 if (res_opts_to_skb(skb, &device->resource->res_opts, exclude_sensitive))
3766 goto nla_put_failure;
3767
3768 rcu_read_lock();
3769 if (got_ldev) {
3770 struct disk_conf *disk_conf;
3771
3772 disk_conf = rcu_dereference(device->ldev->disk_conf);
3773 err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive);
3774 }
3775 if (!err) {
3776 struct net_conf *nc;
3777
3778 nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
3779 if (nc)
3780 err = net_conf_to_skb(skb, nc, exclude_sensitive);
3781 }
3782 rcu_read_unlock();
3783 if (err)
3784 goto nla_put_failure;
3785
3786 nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO);
3787 if (!nla)
3788 goto nla_put_failure;
3789 if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) ||
3790 nla_put_u32(skb, T_current_state, device->state.i) ||
3791 nla_put_u64_0pad(skb, T_ed_uuid, device->ed_uuid) ||
3792 nla_put_u64_0pad(skb, T_capacity,
3793 drbd_get_capacity(device->this_bdev)) ||
3794 nla_put_u64_0pad(skb, T_send_cnt, device->send_cnt) ||
3795 nla_put_u64_0pad(skb, T_recv_cnt, device->recv_cnt) ||
3796 nla_put_u64_0pad(skb, T_read_cnt, device->read_cnt) ||
3797 nla_put_u64_0pad(skb, T_writ_cnt, device->writ_cnt) ||
3798 nla_put_u64_0pad(skb, T_al_writ_cnt, device->al_writ_cnt) ||
3799 nla_put_u64_0pad(skb, T_bm_writ_cnt, device->bm_writ_cnt) ||
3800 nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&device->ap_bio_cnt)) ||
3801 nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&device->ap_pending_cnt)) ||
3802 nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&device->rs_pending_cnt)))
3803 goto nla_put_failure;
3804
3805 if (got_ldev) {
3806 int err;
3807
3808 spin_lock_irq(&device->ldev->md.uuid_lock);
3809 err = nla_put(skb, T_uuids, sizeof(si->uuids), device->ldev->md.uuid);
3810 spin_unlock_irq(&device->ldev->md.uuid_lock);
3811
3812 if (err)
3813 goto nla_put_failure;
3814
3815 if (nla_put_u32(skb, T_disk_flags, device->ldev->md.flags) ||
3816 nla_put_u64_0pad(skb, T_bits_total, drbd_bm_bits(device)) ||
3817 nla_put_u64_0pad(skb, T_bits_oos,
3818 drbd_bm_total_weight(device)))
3819 goto nla_put_failure;
3820 if (C_SYNC_SOURCE <= device->state.conn &&
3821 C_PAUSED_SYNC_T >= device->state.conn) {
3822 if (nla_put_u64_0pad(skb, T_bits_rs_total,
3823 device->rs_total) ||
3824 nla_put_u64_0pad(skb, T_bits_rs_failed,
3825 device->rs_failed))
3826 goto nla_put_failure;
3827 }
3828 }
3829
3830 if (sib) {
3831 switch(sib->sib_reason) {
3832 case SIB_SYNC_PROGRESS:
3833 case SIB_GET_STATUS_REPLY:
3834 break;
3835 case SIB_STATE_CHANGE:
3836 if (nla_put_u32(skb, T_prev_state, sib->os.i) ||
3837 nla_put_u32(skb, T_new_state, sib->ns.i))
3838 goto nla_put_failure;
3839 break;
3840 case SIB_HELPER_POST:
3841 if (nla_put_u32(skb, T_helper_exit_code,
3842 sib->helper_exit_code))
3843 goto nla_put_failure;
3844
3845 case SIB_HELPER_PRE:
3846 if (nla_put_string(skb, T_helper, sib->helper_name))
3847 goto nla_put_failure;
3848 break;
3849 }
3850 }
3851 nla_nest_end(skb, nla);
3852
3853 if (0)
3854nla_put_failure:
3855 err = -EMSGSIZE;
3856 if (got_ldev)
3857 put_ldev(device);
3858 return err;
3859}
3860
3861int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info)
3862{
3863 struct drbd_config_context adm_ctx;
3864 enum drbd_ret_code retcode;
3865 int err;
3866
3867 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
3868 if (!adm_ctx.reply_skb)
3869 return retcode;
3870 if (retcode != NO_ERROR)
3871 goto out;
3872
3873 err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.device, NULL);
3874 if (err) {
3875 nlmsg_free(adm_ctx.reply_skb);
3876 return err;
3877 }
3878out:
3879 drbd_adm_finish(&adm_ctx, info, retcode);
3880 return 0;
3881}
3882
3883static int get_one_status(struct sk_buff *skb, struct netlink_callback *cb)
3884{
3885 struct drbd_device *device;
3886 struct drbd_genlmsghdr *dh;
3887 struct drbd_resource *pos = (struct drbd_resource *)cb->args[0];
3888 struct drbd_resource *resource = NULL;
3889 struct drbd_resource *tmp;
3890 unsigned volume = cb->args[1];
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914 rcu_read_lock();
3915
3916 for_each_resource_rcu(tmp, &drbd_resources) {
3917 if (pos == NULL) {
3918
3919 pos = tmp;
3920 resource = pos;
3921 break;
3922 }
3923 if (tmp == pos) {
3924 resource = pos;
3925 break;
3926 }
3927 }
3928 if (resource) {
3929next_resource:
3930 device = idr_get_next(&resource->devices, &volume);
3931 if (!device) {
3932
3933
3934 pos = list_entry_rcu(resource->resources.next,
3935 struct drbd_resource, resources);
3936
3937 if (volume != 0) {
3938
3939
3940
3941 if (&pos->resources == &drbd_resources || cb->args[2])
3942 goto out;
3943 volume = 0;
3944 resource = pos;
3945 goto next_resource;
3946 }
3947 }
3948
3949 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3950 cb->nlh->nlmsg_seq, &drbd_genl_family,
3951 NLM_F_MULTI, DRBD_ADM_GET_STATUS);
3952 if (!dh)
3953 goto out;
3954
3955 if (!device) {
3956
3957
3958
3959 struct drbd_connection *connection;
3960
3961 dh->minor = -1U;
3962 dh->ret_code = NO_ERROR;
3963 connection = the_only_connection(resource);
3964 if (nla_put_drbd_cfg_context(skb, resource, connection, NULL))
3965 goto cancel;
3966 if (connection) {
3967 struct net_conf *nc;
3968
3969 nc = rcu_dereference(connection->net_conf);
3970 if (nc && net_conf_to_skb(skb, nc, 1) != 0)
3971 goto cancel;
3972 }
3973 goto done;
3974 }
3975
3976 D_ASSERT(device, device->vnr == volume);
3977 D_ASSERT(device, device->resource == resource);
3978
3979 dh->minor = device_to_minor(device);
3980 dh->ret_code = NO_ERROR;
3981
3982 if (nla_put_status_info(skb, device, NULL)) {
3983cancel:
3984 genlmsg_cancel(skb, dh);
3985 goto out;
3986 }
3987done:
3988 genlmsg_end(skb, dh);
3989 }
3990
3991out:
3992 rcu_read_unlock();
3993
3994 cb->args[0] = (long)pos;
3995 cb->args[1] = (pos == resource) ? volume + 1 : 0;
3996
3997
3998
3999 return skb->len;
4000}
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb)
4013{
4014 const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ;
4015 struct nlattr *nla;
4016 const char *resource_name;
4017 struct drbd_resource *resource;
4018 int maxtype;
4019
4020
4021 if (cb->args[0]) {
4022
4023
4024 if (cb->args[2] && cb->args[2] != cb->args[0])
4025 return 0;
4026 goto dump;
4027 }
4028
4029
4030
4031 nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen),
4032 nlmsg_attrlen(cb->nlh, hdrlen),
4033 DRBD_NLA_CFG_CONTEXT);
4034
4035
4036 if (!nla)
4037 goto dump;
4038 maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1;
4039 nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name));
4040 if (IS_ERR(nla))
4041 return PTR_ERR(nla);
4042
4043 if (!nla)
4044 return -EINVAL;
4045 resource_name = nla_data(nla);
4046 if (!*resource_name)
4047 return -ENODEV;
4048 resource = drbd_find_resource(resource_name);
4049 if (!resource)
4050 return -ENODEV;
4051
4052 kref_put(&resource->kref, drbd_destroy_resource);
4053
4054
4055
4056 cb->args[0] = (long)resource;
4057
4058 cb->args[2] = (long)resource;
4059
4060dump:
4061 return get_one_status(skb, cb);
4062}
4063
4064int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info)
4065{
4066 struct drbd_config_context adm_ctx;
4067 enum drbd_ret_code retcode;
4068 struct timeout_parms tp;
4069 int err;
4070
4071 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
4072 if (!adm_ctx.reply_skb)
4073 return retcode;
4074 if (retcode != NO_ERROR)
4075 goto out;
4076
4077 tp.timeout_type =
4078 adm_ctx.device->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED :
4079 test_bit(USE_DEGR_WFC_T, &adm_ctx.device->flags) ? UT_DEGRADED :
4080 UT_DEFAULT;
4081
4082 err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp);
4083 if (err) {
4084 nlmsg_free(adm_ctx.reply_skb);
4085 return err;
4086 }
4087out:
4088 drbd_adm_finish(&adm_ctx, info, retcode);
4089 return 0;
4090}
4091
4092int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info)
4093{
4094 struct drbd_config_context adm_ctx;
4095 struct drbd_device *device;
4096 enum drbd_ret_code retcode;
4097 struct start_ov_parms parms;
4098
4099 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
4100 if (!adm_ctx.reply_skb)
4101 return retcode;
4102 if (retcode != NO_ERROR)
4103 goto out;
4104
4105 device = adm_ctx.device;
4106
4107
4108 parms.ov_start_sector = device->ov_start_sector;
4109 parms.ov_stop_sector = ULLONG_MAX;
4110 if (info->attrs[DRBD_NLA_START_OV_PARMS]) {
4111 int err = start_ov_parms_from_attrs(&parms, info);
4112 if (err) {
4113 retcode = ERR_MANDATORY_TAG;
4114 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
4115 goto out;
4116 }
4117 }
4118 mutex_lock(&adm_ctx.resource->adm_mutex);
4119
4120
4121 device->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1);
4122 device->ov_stop_sector = parms.ov_stop_sector;
4123
4124
4125
4126 drbd_suspend_io(device);
4127 wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags));
4128 retcode = drbd_request_state(device, NS(conn, C_VERIFY_S));
4129 drbd_resume_io(device);
4130
4131 mutex_unlock(&adm_ctx.resource->adm_mutex);
4132out:
4133 drbd_adm_finish(&adm_ctx, info, retcode);
4134 return 0;
4135}
4136
4137
4138int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info)
4139{
4140 struct drbd_config_context adm_ctx;
4141 struct drbd_device *device;
4142 enum drbd_ret_code retcode;
4143 int skip_initial_sync = 0;
4144 int err;
4145 struct new_c_uuid_parms args;
4146
4147 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
4148 if (!adm_ctx.reply_skb)
4149 return retcode;
4150 if (retcode != NO_ERROR)
4151 goto out_nolock;
4152
4153 device = adm_ctx.device;
4154 memset(&args, 0, sizeof(args));
4155 if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) {
4156 err = new_c_uuid_parms_from_attrs(&args, info);
4157 if (err) {
4158 retcode = ERR_MANDATORY_TAG;
4159 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
4160 goto out_nolock;
4161 }
4162 }
4163
4164 mutex_lock(&adm_ctx.resource->adm_mutex);
4165 mutex_lock(device->state_mutex);
4166
4167 if (!get_ldev(device)) {
4168 retcode = ERR_NO_DISK;
4169 goto out;
4170 }
4171
4172
4173 if (device->state.conn == C_CONNECTED &&
4174 first_peer_device(device)->connection->agreed_pro_version >= 90 &&
4175 device->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) {
4176 drbd_info(device, "Preparing to skip initial sync\n");
4177 skip_initial_sync = 1;
4178 } else if (device->state.conn != C_STANDALONE) {
4179 retcode = ERR_CONNECTED;
4180 goto out_dec;
4181 }
4182
4183 drbd_uuid_set(device, UI_BITMAP, 0);
4184 drbd_uuid_new_current(device);
4185
4186 if (args.clear_bm) {
4187 err = drbd_bitmap_io(device, &drbd_bmio_clear_n_write,
4188 "clear_n_write from new_c_uuid", BM_LOCKED_MASK);
4189 if (err) {
4190 drbd_err(device, "Writing bitmap failed with %d\n", err);
4191 retcode = ERR_IO_MD_DISK;
4192 }
4193 if (skip_initial_sync) {
4194 drbd_send_uuids_skip_initial_sync(first_peer_device(device));
4195 _drbd_uuid_set(device, UI_BITMAP, 0);
4196 drbd_print_uuids(device, "cleared bitmap UUID");
4197 spin_lock_irq(&device->resource->req_lock);
4198 _drbd_set_state(_NS2(device, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
4199 CS_VERBOSE, NULL);
4200 spin_unlock_irq(&device->resource->req_lock);
4201 }
4202 }
4203
4204 drbd_md_sync(device);
4205out_dec:
4206 put_ldev(device);
4207out:
4208 mutex_unlock(device->state_mutex);
4209 mutex_unlock(&adm_ctx.resource->adm_mutex);
4210out_nolock:
4211 drbd_adm_finish(&adm_ctx, info, retcode);
4212 return 0;
4213}
4214
4215static enum drbd_ret_code
4216drbd_check_resource_name(struct drbd_config_context *adm_ctx)
4217{
4218 const char *name = adm_ctx->resource_name;
4219 if (!name || !name[0]) {
4220 drbd_msg_put_info(adm_ctx->reply_skb, "resource name missing");
4221 return ERR_MANDATORY_TAG;
4222 }
4223
4224
4225 if (strchr(name, '/')) {
4226 drbd_msg_put_info(adm_ctx->reply_skb, "invalid resource name");
4227 return ERR_INVALID_REQUEST;
4228 }
4229 return NO_ERROR;
4230}
4231
4232static void resource_to_info(struct resource_info *info,
4233 struct drbd_resource *resource)
4234{
4235 info->res_role = conn_highest_role(first_connection(resource));
4236 info->res_susp = resource->susp;
4237 info->res_susp_nod = resource->susp_nod;
4238 info->res_susp_fen = resource->susp_fen;
4239}
4240
4241int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
4242{
4243 struct drbd_connection *connection;
4244 struct drbd_config_context adm_ctx;
4245 enum drbd_ret_code retcode;
4246 struct res_opts res_opts;
4247 int err;
4248
4249 retcode = drbd_adm_prepare(&adm_ctx, skb, info, 0);
4250 if (!adm_ctx.reply_skb)
4251 return retcode;
4252 if (retcode != NO_ERROR)
4253 goto out;
4254
4255 set_res_opts_defaults(&res_opts);
4256 err = res_opts_from_attrs(&res_opts, info);
4257 if (err && err != -ENOMSG) {
4258 retcode = ERR_MANDATORY_TAG;
4259 drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err));
4260 goto out;
4261 }
4262
4263 retcode = drbd_check_resource_name(&adm_ctx);
4264 if (retcode != NO_ERROR)
4265 goto out;
4266
4267 if (adm_ctx.resource) {
4268 if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) {
4269 retcode = ERR_INVALID_REQUEST;
4270 drbd_msg_put_info(adm_ctx.reply_skb, "resource exists");
4271 }
4272
4273 goto out;
4274 }
4275
4276
4277 mutex_lock(&resources_mutex);
4278 connection = conn_create(adm_ctx.resource_name, &res_opts);
4279 mutex_unlock(&resources_mutex);
4280
4281 if (connection) {
4282 struct resource_info resource_info;
4283
4284 mutex_lock(¬ification_mutex);
4285 resource_to_info(&resource_info, connection->resource);
4286 notify_resource_state(NULL, 0, connection->resource,
4287 &resource_info, NOTIFY_CREATE);
4288 mutex_unlock(¬ification_mutex);
4289 } else
4290 retcode = ERR_NOMEM;
4291
4292out:
4293 drbd_adm_finish(&adm_ctx, info, retcode);
4294 return 0;
4295}
4296
4297static void device_to_info(struct device_info *info,
4298 struct drbd_device *device)
4299{
4300 info->dev_disk_state = device->state.disk;
4301}
4302
4303
4304int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info)
4305{
4306 struct drbd_config_context adm_ctx;
4307 struct drbd_genlmsghdr *dh = info->userhdr;
4308 enum drbd_ret_code retcode;
4309
4310 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
4311 if (!adm_ctx.reply_skb)
4312 return retcode;
4313 if (retcode != NO_ERROR)
4314 goto out;
4315
4316 if (dh->minor > MINORMASK) {
4317 drbd_msg_put_info(adm_ctx.reply_skb, "requested minor out of range");
4318 retcode = ERR_INVALID_REQUEST;
4319 goto out;
4320 }
4321 if (adm_ctx.volume > DRBD_VOLUME_MAX) {
4322 drbd_msg_put_info(adm_ctx.reply_skb, "requested volume id out of range");
4323 retcode = ERR_INVALID_REQUEST;
4324 goto out;
4325 }
4326
4327
4328
4329 if (adm_ctx.device) {
4330 if (info->nlhdr->nlmsg_flags & NLM_F_EXCL)
4331 retcode = ERR_MINOR_OR_VOLUME_EXISTS;
4332
4333 goto out;
4334 }
4335
4336 mutex_lock(&adm_ctx.resource->adm_mutex);
4337 retcode = drbd_create_device(&adm_ctx, dh->minor);
4338 if (retcode == NO_ERROR) {
4339 struct drbd_device *device;
4340 struct drbd_peer_device *peer_device;
4341 struct device_info info;
4342 unsigned int peer_devices = 0;
4343 enum drbd_notification_type flags;
4344
4345 device = minor_to_device(dh->minor);
4346 for_each_peer_device(peer_device, device) {
4347 if (!has_net_conf(peer_device->connection))
4348 continue;
4349 peer_devices++;
4350 }
4351
4352 device_to_info(&info, device);
4353 mutex_lock(¬ification_mutex);
4354 flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
4355 notify_device_state(NULL, 0, device, &info, NOTIFY_CREATE | flags);
4356 for_each_peer_device(peer_device, device) {
4357 struct peer_device_info peer_device_info;
4358
4359 if (!has_net_conf(peer_device->connection))
4360 continue;
4361 peer_device_to_info(&peer_device_info, peer_device);
4362 flags = (peer_devices--) ? NOTIFY_CONTINUES : 0;
4363 notify_peer_device_state(NULL, 0, peer_device, &peer_device_info,
4364 NOTIFY_CREATE | flags);
4365 }
4366 mutex_unlock(¬ification_mutex);
4367 }
4368 mutex_unlock(&adm_ctx.resource->adm_mutex);
4369out:
4370 drbd_adm_finish(&adm_ctx, info, retcode);
4371 return 0;
4372}
4373
4374static enum drbd_ret_code adm_del_minor(struct drbd_device *device)
4375{
4376 struct drbd_peer_device *peer_device;
4377
4378 if (device->state.disk == D_DISKLESS &&
4379
4380
4381
4382 device->state.role == R_SECONDARY) {
4383 struct drbd_connection *connection =
4384 first_connection(device->resource);
4385
4386 _drbd_request_state(device, NS(conn, C_WF_REPORT_PARAMS),
4387 CS_VERBOSE + CS_WAIT_COMPLETE);
4388
4389
4390
4391
4392 if (get_t_state(&connection->worker) == RUNNING)
4393 drbd_flush_workqueue(&connection->sender_work);
4394
4395 mutex_lock(¬ification_mutex);
4396 for_each_peer_device(peer_device, device) {
4397 if (!has_net_conf(peer_device->connection))
4398 continue;
4399 notify_peer_device_state(NULL, 0, peer_device, NULL,
4400 NOTIFY_DESTROY | NOTIFY_CONTINUES);
4401 }
4402 notify_device_state(NULL, 0, device, NULL, NOTIFY_DESTROY);
4403 mutex_unlock(¬ification_mutex);
4404
4405 drbd_delete_device(device);
4406 return NO_ERROR;
4407 } else
4408 return ERR_MINOR_CONFIGURED;
4409}
4410
4411int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info)
4412{
4413 struct drbd_config_context adm_ctx;
4414 enum drbd_ret_code retcode;
4415
4416 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR);
4417 if (!adm_ctx.reply_skb)
4418 return retcode;
4419 if (retcode != NO_ERROR)
4420 goto out;
4421
4422 mutex_lock(&adm_ctx.resource->adm_mutex);
4423 retcode = adm_del_minor(adm_ctx.device);
4424 mutex_unlock(&adm_ctx.resource->adm_mutex);
4425out:
4426 drbd_adm_finish(&adm_ctx, info, retcode);
4427 return 0;
4428}
4429
4430static int adm_del_resource(struct drbd_resource *resource)
4431{
4432 struct drbd_connection *connection;
4433
4434 for_each_connection(connection, resource) {
4435 if (connection->cstate > C_STANDALONE)
4436 return ERR_NET_CONFIGURED;
4437 }
4438 if (!idr_is_empty(&resource->devices))
4439 return ERR_RES_IN_USE;
4440
4441
4442
4443
4444 mutex_lock(¬ification_mutex);
4445 notify_resource_state(NULL, 0, resource, NULL, NOTIFY_DESTROY);
4446 mutex_unlock(¬ification_mutex);
4447
4448 mutex_lock(&resources_mutex);
4449 list_del_rcu(&resource->resources);
4450 mutex_unlock(&resources_mutex);
4451
4452
4453 list_for_each_entry(connection, &resource->connections, connections)
4454 drbd_thread_stop(&connection->worker);
4455 synchronize_rcu();
4456 drbd_free_resource(resource);
4457 return NO_ERROR;
4458}
4459
4460int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)
4461{
4462 struct drbd_config_context adm_ctx;
4463 struct drbd_resource *resource;
4464 struct drbd_connection *connection;
4465 struct drbd_device *device;
4466 int retcode;
4467 unsigned i;
4468
4469 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
4470 if (!adm_ctx.reply_skb)
4471 return retcode;
4472 if (retcode != NO_ERROR)
4473 goto finish;
4474
4475 resource = adm_ctx.resource;
4476 mutex_lock(&resource->adm_mutex);
4477
4478 for_each_connection(connection, resource) {
4479 struct drbd_peer_device *peer_device;
4480
4481 idr_for_each_entry(&connection->peer_devices, peer_device, i) {
4482 retcode = drbd_set_role(peer_device->device, R_SECONDARY, 0);
4483 if (retcode < SS_SUCCESS) {
4484 drbd_msg_put_info(adm_ctx.reply_skb, "failed to demote");
4485 goto out;
4486 }
4487 }
4488
4489 retcode = conn_try_disconnect(connection, 0);
4490 if (retcode < SS_SUCCESS) {
4491 drbd_msg_put_info(adm_ctx.reply_skb, "failed to disconnect");
4492 goto out;
4493 }
4494 }
4495
4496
4497 idr_for_each_entry(&resource->devices, device, i) {
4498 retcode = adm_detach(device, 0);
4499 if (retcode < SS_SUCCESS || retcode > NO_ERROR) {
4500 drbd_msg_put_info(adm_ctx.reply_skb, "failed to detach");
4501 goto out;
4502 }
4503 }
4504
4505
4506 idr_for_each_entry(&resource->devices, device, i) {
4507 retcode = adm_del_minor(device);
4508 if (retcode != NO_ERROR) {
4509
4510 drbd_msg_put_info(adm_ctx.reply_skb, "failed to delete volume");
4511 goto out;
4512 }
4513 }
4514
4515 retcode = adm_del_resource(resource);
4516out:
4517 mutex_unlock(&resource->adm_mutex);
4518finish:
4519 drbd_adm_finish(&adm_ctx, info, retcode);
4520 return 0;
4521}
4522
4523int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info)
4524{
4525 struct drbd_config_context adm_ctx;
4526 struct drbd_resource *resource;
4527 enum drbd_ret_code retcode;
4528
4529 retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE);
4530 if (!adm_ctx.reply_skb)
4531 return retcode;
4532 if (retcode != NO_ERROR)
4533 goto finish;
4534 resource = adm_ctx.resource;
4535
4536 mutex_lock(&resource->adm_mutex);
4537 retcode = adm_del_resource(resource);
4538 mutex_unlock(&resource->adm_mutex);
4539finish:
4540 drbd_adm_finish(&adm_ctx, info, retcode);
4541 return 0;
4542}
4543
4544void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib)
4545{
4546 struct sk_buff *msg;
4547 struct drbd_genlmsghdr *d_out;
4548 unsigned seq;
4549 int err = -ENOMEM;
4550
4551 seq = atomic_inc_return(&drbd_genl_seq);
4552 msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
4553 if (!msg)
4554 goto failed;
4555
4556 err = -EMSGSIZE;
4557 d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT);
4558 if (!d_out)
4559 goto nla_put_failure;
4560 d_out->minor = device_to_minor(device);
4561 d_out->ret_code = NO_ERROR;
4562
4563 if (nla_put_status_info(msg, device, sib))
4564 goto nla_put_failure;
4565 genlmsg_end(msg, d_out);
4566 err = drbd_genl_multicast_events(msg, GFP_NOWAIT);
4567
4568 if (err && err != -ESRCH)
4569 goto failed;
4570
4571 return;
4572
4573nla_put_failure:
4574 nlmsg_free(msg);
4575failed:
4576 drbd_err(device, "Error %d while broadcasting event. "
4577 "Event seq:%u sib_reason:%u\n",
4578 err, seq, sib->sib_reason);
4579}
4580
4581static int nla_put_notification_header(struct sk_buff *msg,
4582 enum drbd_notification_type type)
4583{
4584 struct drbd_notification_header nh = {
4585 .nh_type = type,
4586 };
4587
4588 return drbd_notification_header_to_skb(msg, &nh, true);
4589}
4590
4591void notify_resource_state(struct sk_buff *skb,
4592 unsigned int seq,
4593 struct drbd_resource *resource,
4594 struct resource_info *resource_info,
4595 enum drbd_notification_type type)
4596{
4597 struct resource_statistics resource_statistics;
4598 struct drbd_genlmsghdr *dh;
4599 bool multicast = false;
4600 int err;
4601
4602 if (!skb) {
4603 seq = atomic_inc_return(¬ify_genl_seq);
4604 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
4605 err = -ENOMEM;
4606 if (!skb)
4607 goto failed;
4608 multicast = true;
4609 }
4610
4611 err = -EMSGSIZE;
4612 dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_RESOURCE_STATE);
4613 if (!dh)
4614 goto nla_put_failure;
4615 dh->minor = -1U;
4616 dh->ret_code = NO_ERROR;
4617 if (nla_put_drbd_cfg_context(skb, resource, NULL, NULL) ||
4618 nla_put_notification_header(skb, type) ||
4619 ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
4620 resource_info_to_skb(skb, resource_info, true)))
4621 goto nla_put_failure;
4622 resource_statistics.res_stat_write_ordering = resource->write_ordering;
4623 err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN));
4624 if (err)
4625 goto nla_put_failure;
4626 genlmsg_end(skb, dh);
4627 if (multicast) {
4628 err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
4629
4630 if (err && err != -ESRCH)
4631 goto failed;
4632 }
4633 return;
4634
4635nla_put_failure:
4636 nlmsg_free(skb);
4637failed:
4638 drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n",
4639 err, seq);
4640}
4641
4642void notify_device_state(struct sk_buff *skb,
4643 unsigned int seq,
4644 struct drbd_device *device,
4645 struct device_info *device_info,
4646 enum drbd_notification_type type)
4647{
4648 struct device_statistics device_statistics;
4649 struct drbd_genlmsghdr *dh;
4650 bool multicast = false;
4651 int err;
4652
4653 if (!skb) {
4654 seq = atomic_inc_return(¬ify_genl_seq);
4655 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
4656 err = -ENOMEM;
4657 if (!skb)
4658 goto failed;
4659 multicast = true;
4660 }
4661
4662 err = -EMSGSIZE;
4663 dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_DEVICE_STATE);
4664 if (!dh)
4665 goto nla_put_failure;
4666 dh->minor = device->minor;
4667 dh->ret_code = NO_ERROR;
4668 if (nla_put_drbd_cfg_context(skb, device->resource, NULL, device) ||
4669 nla_put_notification_header(skb, type) ||
4670 ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
4671 device_info_to_skb(skb, device_info, true)))
4672 goto nla_put_failure;
4673 device_to_statistics(&device_statistics, device);
4674 device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN));
4675 genlmsg_end(skb, dh);
4676 if (multicast) {
4677 err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
4678
4679 if (err && err != -ESRCH)
4680 goto failed;
4681 }
4682 return;
4683
4684nla_put_failure:
4685 nlmsg_free(skb);
4686failed:
4687 drbd_err(device, "Error %d while broadcasting event. Event seq:%u\n",
4688 err, seq);
4689}
4690
4691void notify_connection_state(struct sk_buff *skb,
4692 unsigned int seq,
4693 struct drbd_connection *connection,
4694 struct connection_info *connection_info,
4695 enum drbd_notification_type type)
4696{
4697 struct connection_statistics connection_statistics;
4698 struct drbd_genlmsghdr *dh;
4699 bool multicast = false;
4700 int err;
4701
4702 if (!skb) {
4703 seq = atomic_inc_return(¬ify_genl_seq);
4704 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
4705 err = -ENOMEM;
4706 if (!skb)
4707 goto failed;
4708 multicast = true;
4709 }
4710
4711 err = -EMSGSIZE;
4712 dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_CONNECTION_STATE);
4713 if (!dh)
4714 goto nla_put_failure;
4715 dh->minor = -1U;
4716 dh->ret_code = NO_ERROR;
4717 if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) ||
4718 nla_put_notification_header(skb, type) ||
4719 ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
4720 connection_info_to_skb(skb, connection_info, true)))
4721 goto nla_put_failure;
4722 connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags);
4723 connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN));
4724 genlmsg_end(skb, dh);
4725 if (multicast) {
4726 err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
4727
4728 if (err && err != -ESRCH)
4729 goto failed;
4730 }
4731 return;
4732
4733nla_put_failure:
4734 nlmsg_free(skb);
4735failed:
4736 drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n",
4737 err, seq);
4738}
4739
4740void notify_peer_device_state(struct sk_buff *skb,
4741 unsigned int seq,
4742 struct drbd_peer_device *peer_device,
4743 struct peer_device_info *peer_device_info,
4744 enum drbd_notification_type type)
4745{
4746 struct peer_device_statistics peer_device_statistics;
4747 struct drbd_resource *resource = peer_device->device->resource;
4748 struct drbd_genlmsghdr *dh;
4749 bool multicast = false;
4750 int err;
4751
4752 if (!skb) {
4753 seq = atomic_inc_return(¬ify_genl_seq);
4754 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
4755 err = -ENOMEM;
4756 if (!skb)
4757 goto failed;
4758 multicast = true;
4759 }
4760
4761 err = -EMSGSIZE;
4762 dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_PEER_DEVICE_STATE);
4763 if (!dh)
4764 goto nla_put_failure;
4765 dh->minor = -1U;
4766 dh->ret_code = NO_ERROR;
4767 if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) ||
4768 nla_put_notification_header(skb, type) ||
4769 ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY &&
4770 peer_device_info_to_skb(skb, peer_device_info, true)))
4771 goto nla_put_failure;
4772 peer_device_to_statistics(&peer_device_statistics, peer_device);
4773 peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN));
4774 genlmsg_end(skb, dh);
4775 if (multicast) {
4776 err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
4777
4778 if (err && err != -ESRCH)
4779 goto failed;
4780 }
4781 return;
4782
4783nla_put_failure:
4784 nlmsg_free(skb);
4785failed:
4786 drbd_err(peer_device, "Error %d while broadcasting event. Event seq:%u\n",
4787 err, seq);
4788}
4789
4790void notify_helper(enum drbd_notification_type type,
4791 struct drbd_device *device, struct drbd_connection *connection,
4792 const char *name, int status)
4793{
4794 struct drbd_resource *resource = device ? device->resource : connection->resource;
4795 struct drbd_helper_info helper_info;
4796 unsigned int seq = atomic_inc_return(¬ify_genl_seq);
4797 struct sk_buff *skb = NULL;
4798 struct drbd_genlmsghdr *dh;
4799 int err;
4800
4801 strlcpy(helper_info.helper_name, name, sizeof(helper_info.helper_name));
4802 helper_info.helper_name_len = min(strlen(name), sizeof(helper_info.helper_name));
4803 helper_info.helper_status = status;
4804
4805 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
4806 err = -ENOMEM;
4807 if (!skb)
4808 goto fail;
4809
4810 err = -EMSGSIZE;
4811 dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_HELPER);
4812 if (!dh)
4813 goto fail;
4814 dh->minor = device ? device->minor : -1;
4815 dh->ret_code = NO_ERROR;
4816 mutex_lock(¬ification_mutex);
4817 if (nla_put_drbd_cfg_context(skb, resource, connection, device) ||
4818 nla_put_notification_header(skb, type) ||
4819 drbd_helper_info_to_skb(skb, &helper_info, true))
4820 goto unlock_fail;
4821 genlmsg_end(skb, dh);
4822 err = drbd_genl_multicast_events(skb, GFP_NOWAIT);
4823 skb = NULL;
4824
4825 if (err && err != -ESRCH)
4826 goto unlock_fail;
4827 mutex_unlock(¬ification_mutex);
4828 return;
4829
4830unlock_fail:
4831 mutex_unlock(¬ification_mutex);
4832fail:
4833 nlmsg_free(skb);
4834 drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n",
4835 err, seq);
4836}
4837
4838static void notify_initial_state_done(struct sk_buff *skb, unsigned int seq)
4839{
4840 struct drbd_genlmsghdr *dh;
4841 int err;
4842
4843 err = -EMSGSIZE;
4844 dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_INITIAL_STATE_DONE);
4845 if (!dh)
4846 goto nla_put_failure;
4847 dh->minor = -1U;
4848 dh->ret_code = NO_ERROR;
4849 if (nla_put_notification_header(skb, NOTIFY_EXISTS))
4850 goto nla_put_failure;
4851 genlmsg_end(skb, dh);
4852 return;
4853
4854nla_put_failure:
4855 nlmsg_free(skb);
4856 pr_err("Error %d sending event. Event seq:%u\n", err, seq);
4857}
4858
4859static void free_state_changes(struct list_head *list)
4860{
4861 while (!list_empty(list)) {
4862 struct drbd_state_change *state_change =
4863 list_first_entry(list, struct drbd_state_change, list);
4864 list_del(&state_change->list);
4865 forget_state_change(state_change);
4866 }
4867}
4868
4869static unsigned int notifications_for_state_change(struct drbd_state_change *state_change)
4870{
4871 return 1 +
4872 state_change->n_connections +
4873 state_change->n_devices +
4874 state_change->n_devices * state_change->n_connections;
4875}
4876
4877static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
4878{
4879 struct drbd_state_change *state_change = (struct drbd_state_change *)cb->args[0];
4880 unsigned int seq = cb->args[2];
4881 unsigned int n;
4882 enum drbd_notification_type flags = 0;
4883
4884
4885
4886
4887
4888
4889 cb->args[5]--;
4890 if (cb->args[5] == 1) {
4891 notify_initial_state_done(skb, seq);
4892 goto out;
4893 }
4894 n = cb->args[4]++;
4895 if (cb->args[4] < cb->args[3])
4896 flags |= NOTIFY_CONTINUES;
4897 if (n < 1) {
4898 notify_resource_state_change(skb, seq, state_change->resource,
4899 NOTIFY_EXISTS | flags);
4900 goto next;
4901 }
4902 n--;
4903 if (n < state_change->n_connections) {
4904 notify_connection_state_change(skb, seq, &state_change->connections[n],
4905 NOTIFY_EXISTS | flags);
4906 goto next;
4907 }
4908 n -= state_change->n_connections;
4909 if (n < state_change->n_devices) {
4910 notify_device_state_change(skb, seq, &state_change->devices[n],
4911 NOTIFY_EXISTS | flags);
4912 goto next;
4913 }
4914 n -= state_change->n_devices;
4915 if (n < state_change->n_devices * state_change->n_connections) {
4916 notify_peer_device_state_change(skb, seq, &state_change->peer_devices[n],
4917 NOTIFY_EXISTS | flags);
4918 goto next;
4919 }
4920
4921next:
4922 if (cb->args[4] == cb->args[3]) {
4923 struct drbd_state_change *next_state_change =
4924 list_entry(state_change->list.next,
4925 struct drbd_state_change, list);
4926 cb->args[0] = (long)next_state_change;
4927 cb->args[3] = notifications_for_state_change(next_state_change);
4928 cb->args[4] = 0;
4929 }
4930out:
4931 return skb->len;
4932}
4933
4934int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
4935{
4936 struct drbd_resource *resource;
4937 LIST_HEAD(head);
4938
4939 if (cb->args[5] >= 1) {
4940 if (cb->args[5] > 1)
4941 return get_initial_state(skb, cb);
4942 if (cb->args[0]) {
4943 struct drbd_state_change *state_change =
4944 (struct drbd_state_change *)cb->args[0];
4945
4946
4947 list_add(&head, &state_change->list);
4948 free_state_changes(&head);
4949 }
4950 return 0;
4951 }
4952
4953 cb->args[5] = 2;
4954 mutex_lock(&resources_mutex);
4955 for_each_resource(resource, &drbd_resources) {
4956 struct drbd_state_change *state_change;
4957
4958 state_change = remember_old_state(resource, GFP_KERNEL);
4959 if (!state_change) {
4960 if (!list_empty(&head))
4961 free_state_changes(&head);
4962 mutex_unlock(&resources_mutex);
4963 return -ENOMEM;
4964 }
4965 copy_old_to_new_state_change(state_change);
4966 list_add_tail(&state_change->list, &head);
4967 cb->args[5] += notifications_for_state_change(state_change);
4968 }
4969 mutex_unlock(&resources_mutex);
4970
4971 if (!list_empty(&head)) {
4972 struct drbd_state_change *state_change =
4973 list_entry(head.next, struct drbd_state_change, list);
4974 cb->args[0] = (long)state_change;
4975 cb->args[3] = notifications_for_state_change(state_change);
4976 list_del(&head);
4977 }
4978
4979 cb->args[2] = cb->nlh->nlmsg_seq;
4980 return get_initial_state(skb, cb);
4981}
4982