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drbd: Also define the default values of boolean flags in a single place
[deliverable/linux.git] / drivers / block / drbd / drbd_nl.c
CommitLineData
b411b363
PR		 1/*
2 drbd_nl.c
3
4 This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
5
6 Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
7 Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
8 Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
9
10 drbd is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
13 any later version.
14
15 drbd is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with drbd; see the file COPYING. If not, write to
22 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23
24 */
25
b411b363
PR		 26#include <linux/module.h>
27#include <linux/drbd.h>
28#include <linux/in.h>
29#include <linux/fs.h>
30#include <linux/file.h>
31#include <linux/slab.h>
b411b363
PR		 32#include <linux/blkpg.h>
33#include <linux/cpumask.h>
34#include "drbd_int.h"
265be2d0 35#include "drbd_req.h"
b411b363
PR		 36#include "drbd_wrappers.h"
37#include <asm/unaligned.h>
b411b363 38#include <linux/drbd_limits.h>
87f7be4c 39#include <linux/kthread.h>
b411b363 40
3b98c0c2
LE		 41#include <net/genetlink.h>
42
43/* .doit */
44// int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info);
45// int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info);
46
47int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info);
48int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info);
49
50int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info);
51int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info);
85f75dd7 52int drbd_adm_down(struct sk_buff *skb, struct genl_info *info);
3b98c0c2
LE		 53
54int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info);
55int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info);
f399002e 56int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info);
3b98c0c2
LE		 57int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info);
58int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info);
f399002e 59int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info);
3b98c0c2
LE		 60int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info);
61int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info);
62int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info);
63int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info);
64int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info);
65int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info);
66int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info);
67int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info);
68int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info);
69int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info);
70int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info);
f399002e 71int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info);
3b98c0c2
LE		 72int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info);
73int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info);
74/* .dumpit */
75int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb);
76
77#include <linux/drbd_genl_api.h>
78#include <linux/genl_magic_func.h>
79
80/* used blkdev_get_by_path, to claim our meta data device(s) */
b411b363
PR		 81static char *drbd_m_holder = "Hands off! this is DRBD's meta data device.";
82
3b98c0c2
LE		 83/* Configuration is strictly serialized, because generic netlink message
84 * processing is strictly serialized by the genl_lock().
85 * Which means we can use one static global drbd_config_context struct.
86 */
87static struct drbd_config_context {
88 /* assigned from drbd_genlmsghdr */
89 unsigned int minor;
90 /* assigned from request attributes, if present */
91 unsigned int volume;
92#define VOLUME_UNSPECIFIED (-1U)
93 /* pointer into the request skb,
94 * limited lifetime! */
95 char *conn_name;
96
97 /* reply buffer */
98 struct sk_buff *reply_skb;
99 /* pointer into reply buffer */
100 struct drbd_genlmsghdr *reply_dh;
101 /* resolved from attributes, if possible */
102 struct drbd_conf *mdev;
103 struct drbd_tconn *tconn;
104} adm_ctx;
105
106static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info)
107{
108 genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb))));
109 if (genlmsg_reply(skb, info))
110 printk(KERN_ERR "drbd: error sending genl reply\n");
b411b363 111}
3b98c0c2
LE		 112
113/* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only
114 * reason it could fail was no space in skb, and there are 4k available. */
8432b314 115int drbd_msg_put_info(const char *info)
3b98c0c2
LE		 116{
117 struct sk_buff *skb = adm_ctx.reply_skb;
118 struct nlattr *nla;
119 int err = -EMSGSIZE;
120
121 if (!info || !info[0])
122 return 0;
123
124 nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY);
125 if (!nla)
126 return err;
127
128 err = nla_put_string(skb, T_info_text, info);
129 if (err) {
130 nla_nest_cancel(skb, nla);
131 return err;
132 } else
133 nla_nest_end(skb, nla);
134 return 0;
b411b363
PR		 135}
136
3b98c0c2
LE		 137/* This would be a good candidate for a "pre_doit" hook,
138 * and per-family private info->pointers.
139 * But we need to stay compatible with older kernels.
140 * If it returns successfully, adm_ctx members are valid.
141 */
142#define DRBD_ADM_NEED_MINOR 1
143#define DRBD_ADM_NEED_CONN 2
144static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info,
145 unsigned flags)
146{
147 struct drbd_genlmsghdr *d_in = info->userhdr;
148 const u8 cmd = info->genlhdr->cmd;
149 int err;
150
151 memset(&adm_ctx, 0, sizeof(adm_ctx));
152
153 /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */
154 if (cmd != DRBD_ADM_GET_STATUS
155 && security_netlink_recv(skb, CAP_SYS_ADMIN))
156 return -EPERM;
157
158 adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
159 if (!adm_ctx.reply_skb)
160 goto fail;
161
162 adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb,
163 info, &drbd_genl_family, 0, cmd);
164 /* put of a few bytes into a fresh skb of >= 4k will always succeed.
165 * but anyways */
166 if (!adm_ctx.reply_dh)
167 goto fail;
168
169 adm_ctx.reply_dh->minor = d_in->minor;
170 adm_ctx.reply_dh->ret_code = NO_ERROR;
171
172 if (info->attrs[DRBD_NLA_CFG_CONTEXT]) {
173 struct nlattr *nla;
174 /* parse and validate only */
f399002e 175 err = drbd_cfg_context_from_attrs(NULL, info);
3b98c0c2
LE		 176 if (err)
177 goto fail;
178
179 /* It was present, and valid,
180 * copy it over to the reply skb. */
181 err = nla_put_nohdr(adm_ctx.reply_skb,
182 info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len,
183 info->attrs[DRBD_NLA_CFG_CONTEXT]);
184 if (err)
185 goto fail;
186
187 /* and assign stuff to the global adm_ctx */
188 nla = nested_attr_tb[__nla_type(T_ctx_volume)];
189 adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED;
190 nla = nested_attr_tb[__nla_type(T_ctx_conn_name)];
191 if (nla)
192 adm_ctx.conn_name = nla_data(nla);
193 } else
194 adm_ctx.volume = VOLUME_UNSPECIFIED;
195
196 adm_ctx.minor = d_in->minor;
197 adm_ctx.mdev = minor_to_mdev(d_in->minor);
0ace9dfa 198 adm_ctx.tconn = conn_get_by_name(adm_ctx.conn_name);
3b98c0c2
LE		 199
200 if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) {
201 drbd_msg_put_info("unknown minor");
202 return ERR_MINOR_INVALID;
203 }
204 if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) {
205 drbd_msg_put_info("unknown connection");
206 return ERR_INVALID_REQUEST;
207 }
208
209 /* some more paranoia, if the request was over-determined */
527f4b24
LE		 210 if (adm_ctx.mdev && adm_ctx.tconn &&
211 adm_ctx.mdev->tconn != adm_ctx.tconn) {
212 pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n",
213 adm_ctx.minor, adm_ctx.conn_name, adm_ctx.mdev->tconn->name);
214 drbd_msg_put_info("minor exists in different connection");
215 return ERR_INVALID_REQUEST;
216 }
3b98c0c2
LE		 217 if (adm_ctx.mdev &&
218 adm_ctx.volume != VOLUME_UNSPECIFIED &&
219 adm_ctx.volume != adm_ctx.mdev->vnr) {
220 pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
221 adm_ctx.minor, adm_ctx.volume,
222 adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name);
527f4b24 223 drbd_msg_put_info("minor exists as different volume");
3b98c0c2
LE		 224 return ERR_INVALID_REQUEST;
225 }
0ace9dfa 226
3b98c0c2
LE		 227 return NO_ERROR;
228
229fail:
230 nlmsg_free(adm_ctx.reply_skb);
231 adm_ctx.reply_skb = NULL;
232 return -ENOMEM;
233}
234
235static int drbd_adm_finish(struct genl_info *info, int retcode)
236{
237 struct nlattr *nla;
238 const char *conn_name = NULL;
239
0ace9dfa
PR		 240 if (adm_ctx.tconn) {
241 kref_put(&adm_ctx.tconn->kref, &conn_destroy);
242 adm_ctx.tconn = NULL;
243 }
244
3b98c0c2
LE		 245 if (!adm_ctx.reply_skb)
246 return -ENOMEM;
247
248 adm_ctx.reply_dh->ret_code = retcode;
249
250 nla = info->attrs[DRBD_NLA_CFG_CONTEXT];
251 if (nla) {
252 nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name));
253 if (nla)
254 conn_name = nla_data(nla);
255 }
256
257 drbd_adm_send_reply(adm_ctx.reply_skb, info);
258 return 0;
259}
b411b363 260
6b75dced 261static void setup_khelper_env(struct drbd_tconn *tconn, char **envp)
b411b363 262{
6b75dced 263 char *afs;
44ed167d 264 struct net_conf *nc;
b411b363 265
44ed167d
PR		 266 rcu_read_lock();
267 nc = rcu_dereference(tconn->net_conf);
268 if (nc) {
269 switch (((struct sockaddr *)nc->peer_addr)->sa_family) {
b411b363
PR		 270 case AF_INET6:
271 afs = "ipv6";
6b75dced 272 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6",
44ed167d 273 &((struct sockaddr_in6 *)nc->peer_addr)->sin6_addr);
b411b363
PR		 274 break;
275 case AF_INET:
276 afs = "ipv4";
6b75dced 277 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
44ed167d 278 &((struct sockaddr_in *)nc->peer_addr)->sin_addr);
b411b363
PR		 279 break;
280 default:
281 afs = "ssocks";
6b75dced 282 snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
44ed167d 283 &((struct sockaddr_in *)nc->peer_addr)->sin_addr);
b411b363 284 }
6b75dced 285 snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs);
b411b363 286 }
44ed167d 287 rcu_read_unlock();
6b75dced
PR		 288}
289
290int drbd_khelper(struct drbd_conf *mdev, char *cmd)
291{
292 char *envp[] = { "HOME=/",
293 "TERM=linux",
294 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
295 (char[20]) { }, /* address family */
296 (char[60]) { }, /* address */
297 NULL };
298 char mb[12];
299 char *argv[] = {usermode_helper, cmd, mb, NULL };
300 struct sib_info sib;
301 int ret;
302
303 snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev));
304 setup_khelper_env(mdev->tconn, envp);
b411b363 305
1090c056
LE		 306 /* The helper may take some time.
307 * write out any unsynced meta data changes now */
308 drbd_md_sync(mdev);
309
b411b363 310 dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb);
3b98c0c2
LE		 311 sib.sib_reason = SIB_HELPER_PRE;
312 sib.helper_name = cmd;
313 drbd_bcast_event(mdev, &sib);
b411b363
PR		 314 ret = call_usermodehelper(usermode_helper, argv, envp, 1);
315 if (ret)
316 dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
317 usermode_helper, cmd, mb,
318 (ret >> 8) & 0xff, ret);
319 else
320 dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
321 usermode_helper, cmd, mb,
322 (ret >> 8) & 0xff, ret);
3b98c0c2
LE		 323 sib.sib_reason = SIB_HELPER_POST;
324 sib.helper_exit_code = ret;
325 drbd_bcast_event(mdev, &sib);
b411b363
PR		 326
327 if (ret < 0) /* Ignore any ERRNOs we got. */
328 ret = 0;
329
330 return ret;
331}
332
6b75dced
PR		 333static void conn_md_sync(struct drbd_tconn *tconn)
334{
335 struct drbd_conf *mdev;
e90285e0 336 int vnr;
6b75dced 337
c141ebda
PR		 338 rcu_read_lock();
339 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
340 kref_get(&mdev->kref);
341 rcu_read_unlock();
6b75dced 342 drbd_md_sync(mdev);
c141ebda
PR		 343 kref_put(&mdev->kref, &drbd_minor_destroy);
344 rcu_read_lock();
345 }
346 rcu_read_unlock();
6b75dced
PR		 347}
348
349int conn_khelper(struct drbd_tconn *tconn, char *cmd)
350{
351 char *envp[] = { "HOME=/",
352 "TERM=linux",
353 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
354 (char[20]) { }, /* address family */
355 (char[60]) { }, /* address */
356 NULL };
357 char *argv[] = {usermode_helper, cmd, tconn->name, NULL };
358 int ret;
359
360 setup_khelper_env(tconn, envp);
361 conn_md_sync(tconn);
362
363 conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name);
364 /* TODO: conn_bcast_event() ?? */
365
366 ret = call_usermodehelper(usermode_helper, argv, envp, 1);
367 if (ret)
368 conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
369 usermode_helper, cmd, tconn->name,
370 (ret >> 8) & 0xff, ret);
371 else
372 conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n",
373 usermode_helper, cmd, tconn->name,
374 (ret >> 8) & 0xff, ret);
375 /* TODO: conn_bcast_event() ?? */
376
377 if (ret < 0) /* Ignore any ERRNOs we got. */
378 ret = 0;
379
380 return ret;
381}
382
cb703454 383static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn)
b411b363 384{
cb703454
PR		 385 enum drbd_fencing_p fp = FP_NOT_AVAIL;
386 struct drbd_conf *mdev;
387 int vnr;
388
695d08fa 389 rcu_read_lock();
cb703454
PR		 390 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
391 if (get_ldev_if_state(mdev, D_CONSISTENT)) {
daeda1cc
PR		 392 fp = max_t(enum drbd_fencing_p, fp,
393 rcu_dereference(mdev->ldev->disk_conf)->fencing);
cb703454
PR		 394 put_ldev(mdev);
395 }
396 }
695d08fa 397 rcu_read_unlock();
cb703454
PR		 398
399 return fp;
400}
401
402bool conn_try_outdate_peer(struct drbd_tconn *tconn)
403{
404 union drbd_state mask = { };
405 union drbd_state val = { };
406 enum drbd_fencing_p fp;
b411b363
PR		 407 char *ex_to_string;
408 int r;
b411b363 409
cb703454
PR		 410 if (tconn->cstate >= C_WF_REPORT_PARAMS) {
411 conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n");
412 return false;
413 }
b411b363 414
cb703454
PR		 415 fp = highest_fencing_policy(tconn);
416 switch (fp) {
417 case FP_NOT_AVAIL:
418 conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n");
fb22c402 419 goto out;
cb703454
PR		 420 case FP_DONT_CARE:
421 return true;
422 default: ;
b411b363
PR		 423 }
424
cb703454 425 r = conn_khelper(tconn, "fence-peer");
b411b363
PR		 426
427 switch ((r>>8) & 0xff) {
428 case 3: /* peer is inconsistent */
429 ex_to_string = "peer is inconsistent or worse";
cb703454
PR		 430 mask.pdsk = D_MASK;
431 val.pdsk = D_INCONSISTENT;
b411b363
PR		 432 break;
433 case 4: /* peer got outdated, or was already outdated */
434 ex_to_string = "peer was fenced";
cb703454
PR		 435 mask.pdsk = D_MASK;
436 val.pdsk = D_OUTDATED;
b411b363
PR		 437 break;
438 case 5: /* peer was down */
cb703454 439 if (conn_highest_disk(tconn) == D_UP_TO_DATE) {
b411b363
PR		 440 /* we will(have) create(d) a new UUID anyways... */
441 ex_to_string = "peer is unreachable, assumed to be dead";
cb703454
PR		 442 mask.pdsk = D_MASK;
443 val.pdsk = D_OUTDATED;
b411b363
PR		 444 } else {
445 ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
b411b363
PR		 446 }
447 break;
448 case 6: /* Peer is primary, voluntarily outdate myself.
449 * This is useful when an unconnected R_SECONDARY is asked to
450 * become R_PRIMARY, but finds the other peer being active. */
451 ex_to_string = "peer is active";
cb703454
PR		 452 conn_warn(tconn, "Peer is primary, outdating myself.\n");
453 mask.disk = D_MASK;
454 val.disk = D_OUTDATED;
b411b363
PR		 455 break;
456 case 7:
457 if (fp != FP_STONITH)
cb703454 458 conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n");
b411b363 459 ex_to_string = "peer was stonithed";
cb703454
PR		 460 mask.pdsk = D_MASK;
461 val.pdsk = D_OUTDATED;
b411b363
PR		 462 break;
463 default:
464 /* The script is broken ... */
cb703454
PR		 465 conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);
466 return false; /* Eventually leave IO frozen */
b411b363
PR		 467 }
468
cb703454
PR		 469 conn_info(tconn, "fence-peer helper returned %d (%s)\n",
470 (r>>8) & 0xff, ex_to_string);
fb22c402 471
cb703454 472 out:
fb22c402 473
cb703454
PR		 474 /* Not using
475 conn_request_state(tconn, mask, val, CS_VERBOSE);
476 here, because we might were able to re-establish the connection in the
477 meantime. */
478 spin_lock_irq(&tconn->req_lock);
479 if (tconn->cstate < C_WF_REPORT_PARAMS)
480 _conn_request_state(tconn, mask, val, CS_VERBOSE);
481 spin_unlock_irq(&tconn->req_lock);
482
483 return conn_highest_pdsk(tconn) <= D_OUTDATED;
b411b363
PR		 484}
485
87f7be4c
PR		 486static int _try_outdate_peer_async(void *data)
487{
cb703454 488 struct drbd_tconn *tconn = (struct drbd_tconn *)data;
87f7be4c 489
cb703454 490 conn_try_outdate_peer(tconn);
87f7be4c 491
9dc9fbb3 492 kref_put(&tconn->kref, &conn_destroy);
87f7be4c
PR		 493 return 0;
494}
495
cb703454 496void conn_try_outdate_peer_async(struct drbd_tconn *tconn)
87f7be4c
PR		 497{
498 struct task_struct *opa;
499
9dc9fbb3 500 kref_get(&tconn->kref);
cb703454 501 opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h");
9dc9fbb3 502 if (IS_ERR(opa)) {
cb703454 503 conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n");
9dc9fbb3
PR		 504 kref_put(&tconn->kref, &conn_destroy);
505 }
87f7be4c 506}
b411b363 507
bf885f8a
AG		 508enum drbd_state_rv
509drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
b411b363
PR		 510{
511 const int max_tries = 4;
bf885f8a 512 enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
44ed167d 513 struct net_conf *nc;
b411b363
PR		 514 int try = 0;
515 int forced = 0;
516 union drbd_state mask, val;
b411b363
PR		 517
518 if (new_role == R_PRIMARY)
0625ac19 519 request_ping(mdev->tconn); /* Detect a dead peer ASAP */
b411b363 520
8410da8f 521 mutex_lock(mdev->state_mutex);
b411b363
PR		 522
523 mask.i = 0; mask.role = R_MASK;
524 val.i = 0; val.role = new_role;
525
526 while (try++ < max_tries) {
bf885f8a 527 rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE);
b411b363
PR		 528
529 /* in case we first succeeded to outdate,
530 * but now suddenly could establish a connection */
bf885f8a 531 if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
b411b363
PR		 532 val.pdsk = 0;
533 mask.pdsk = 0;
534 continue;
535 }
536
bf885f8a 537 if (rv == SS_NO_UP_TO_DATE_DISK && force &&
d10a33c6
PR		 538 (mdev->state.disk < D_UP_TO_DATE &&
539 mdev->state.disk >= D_INCONSISTENT)) {
b411b363
PR		 540 mask.disk = D_MASK;
541 val.disk = D_UP_TO_DATE;
542 forced = 1;
543 continue;
544 }
545
bf885f8a 546 if (rv == SS_NO_UP_TO_DATE_DISK &&
b411b363
PR		 547 mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) {
548 D_ASSERT(mdev->state.pdsk == D_UNKNOWN);
b411b363 549
cb703454 550 if (conn_try_outdate_peer(mdev->tconn)) {
b411b363
PR		 551 val.disk = D_UP_TO_DATE;
552 mask.disk = D_MASK;
553 }
b411b363
PR		 554 continue;
555 }
556
bf885f8a 557 if (rv == SS_NOTHING_TO_DO)
3b98c0c2 558 goto out;
bf885f8a 559 if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
cb703454 560 if (!conn_try_outdate_peer(mdev->tconn) && force) {
b411b363 561 dev_warn(DEV, "Forced into split brain situation!\n");
cb703454
PR		 562 mask.pdsk = D_MASK;
563 val.pdsk = D_OUTDATED;
b411b363 564
cb703454 565 }
b411b363
PR		 566 continue;
567 }
bf885f8a 568 if (rv == SS_TWO_PRIMARIES) {
b411b363
PR		 569 /* Maybe the peer is detected as dead very soon...
570 retry at most once more in this case. */
44ed167d
PR		 571 int timeo;
572 rcu_read_lock();
573 nc = rcu_dereference(mdev->tconn->net_conf);
574 timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
575 rcu_read_unlock();
576 schedule_timeout_interruptible(timeo);
b411b363
PR		 577 if (try < max_tries)
578 try = max_tries - 1;
579 continue;
580 }
bf885f8a
AG		 581 if (rv < SS_SUCCESS) {
582 rv = _drbd_request_state(mdev, mask, val,
b411b363 583 CS_VERBOSE + CS_WAIT_COMPLETE);
bf885f8a 584 if (rv < SS_SUCCESS)
3b98c0c2 585 goto out;
b411b363
PR		 586 }
587 break;
588 }
589
bf885f8a 590 if (rv < SS_SUCCESS)
3b98c0c2 591 goto out;
b411b363
PR		 592
593 if (forced)
594 dev_warn(DEV, "Forced to consider local data as UpToDate!\n");
595
596 /* Wait until nothing is on the fly :) */
597 wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0);
598
599 if (new_role == R_SECONDARY) {
81e84650 600 set_disk_ro(mdev->vdisk, true);
b411b363
PR		 601 if (get_ldev(mdev)) {
602 mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
603 put_ldev(mdev);
604 }
605 } else {
a0095508 606 mutex_lock(&mdev->tconn->conf_update);
91fd4dad 607 nc = mdev->tconn->net_conf;
44ed167d 608 if (nc)
91fd4dad 609 nc->want_lose = 0; /* without copy; single bit op is atomic */
a0095508 610 mutex_unlock(&mdev->tconn->conf_update);
91fd4dad 611
81e84650 612 set_disk_ro(mdev->vdisk, false);
b411b363
PR		 613 if (get_ldev(mdev)) {
614 if (((mdev->state.conn < C_CONNECTED ||
615 mdev->state.pdsk <= D_FAILED)
616 && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced)
617 drbd_uuid_new_current(mdev);
618
619 mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
620 put_ldev(mdev);
621 }
622 }
623
19f843aa
LE		 624 /* writeout of activity log covered areas of the bitmap
625 * to stable storage done in after state change already */
b411b363
PR		 626
627 if (mdev->state.conn >= C_WF_REPORT_PARAMS) {
628 /* if this was forced, we should consider sync */
629 if (forced)
630 drbd_send_uuids(mdev);
631 drbd_send_state(mdev);
632 }
633
634 drbd_md_sync(mdev);
635
636 kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
3b98c0c2 637out:
8410da8f 638 mutex_unlock(mdev->state_mutex);
bf885f8a 639 return rv;
b411b363
PR		 640}
641
3b98c0c2 642static const char *from_attrs_err_to_txt(int err)
b411b363 643{
3b98c0c2
LE		 644 return err == -ENOMSG ? "required attribute missing" :
645 err == -EOPNOTSUPP ? "unknown mandatory attribute" :
f399002e 646 err == -EEXIST ? "can not change invariant setting" :
3b98c0c2 647 "invalid attribute value";
b411b363
PR		 648}
649
3b98c0c2 650int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info)
b411b363 651{
3b98c0c2
LE		 652 struct set_role_parms parms;
653 int err;
654 enum drbd_ret_code retcode;
b411b363 655
3b98c0c2
LE		 656 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
657 if (!adm_ctx.reply_skb)
658 return retcode;
659 if (retcode != NO_ERROR)
660 goto out;
661
662 memset(&parms, 0, sizeof(parms));
663 if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) {
f399002e 664 err = set_role_parms_from_attrs(&parms, info);
3b98c0c2
LE		 665 if (err) {
666 retcode = ERR_MANDATORY_TAG;
667 drbd_msg_put_info(from_attrs_err_to_txt(err));
668 goto out;
669 }
670 }
671
672 if (info->genlhdr->cmd == DRBD_ADM_PRIMARY)
673 retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate);
674 else
675 retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0);
676out:
677 drbd_adm_finish(info, retcode);
b411b363
PR		 678 return 0;
679}
680
681/* initializes the md.*_offset members, so we are able to find
682 * the on disk meta data */
683static void drbd_md_set_sector_offsets(struct drbd_conf *mdev,
684 struct drbd_backing_dev *bdev)
685{
686 sector_t md_size_sect = 0;
daeda1cc
PR		 687 int meta_dev_idx;
688
689 rcu_read_lock();
690 meta_dev_idx = rcu_dereference(bdev->disk_conf)->meta_dev_idx;
691
692 switch (meta_dev_idx) {
b411b363
PR		 693 default:
694 /* v07 style fixed size indexed meta data */
695 bdev->md.md_size_sect = MD_RESERVED_SECT;
696 bdev->md.md_offset = drbd_md_ss__(mdev, bdev);
697 bdev->md.al_offset = MD_AL_OFFSET;
698 bdev->md.bm_offset = MD_BM_OFFSET;
699 break;
700 case DRBD_MD_INDEX_FLEX_EXT:
701 /* just occupy the full device; unit: sectors */
702 bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev);
703 bdev->md.md_offset = 0;
704 bdev->md.al_offset = MD_AL_OFFSET;
705 bdev->md.bm_offset = MD_BM_OFFSET;
706 break;
707 case DRBD_MD_INDEX_INTERNAL:
708 case DRBD_MD_INDEX_FLEX_INT:
709 bdev->md.md_offset = drbd_md_ss__(mdev, bdev);
710 /* al size is still fixed */
7ad651b5 711 bdev->md.al_offset = -MD_AL_SECTORS;
b411b363
PR		 712 /* we need (slightly less than) ~ this much bitmap sectors: */
713 md_size_sect = drbd_get_capacity(bdev->backing_bdev);
714 md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT);
715 md_size_sect = BM_SECT_TO_EXT(md_size_sect);
716 md_size_sect = ALIGN(md_size_sect, 8);
717
718 /* plus the "drbd meta data super block",
719 * and the activity log; */
720 md_size_sect += MD_BM_OFFSET;
721
722 bdev->md.md_size_sect = md_size_sect;
723 /* bitmap offset is adjusted by 'super' block size */
724 bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET;
725 break;
726 }
daeda1cc 727 rcu_read_unlock();
b411b363
PR		 728}
729
4b0715f0 730/* input size is expected to be in KB */
b411b363
PR		 731char *ppsize(char *buf, unsigned long long size)
732{
4b0715f0
LE		 733 /* Needs 9 bytes at max including trailing NUL:
734 * -1ULL ==> "16384 EB" */
b411b363
PR		 735 static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
736 int base = 0;
4b0715f0 737 while (size >= 10000 && base < sizeof(units)-1) {
b411b363
PR		 738 /* shift + round */
739 size = (size >> 10) + !!(size & (1<<9));
740 base++;
741 }
4b0715f0 742 sprintf(buf, "%u %cB", (unsigned)size, units[base]);
b411b363
PR		 743
744 return buf;
745}
746
747/* there is still a theoretical deadlock when called from receiver
748 * on an D_INCONSISTENT R_PRIMARY:
749 * remote READ does inc_ap_bio, receiver would need to receive answer
750 * packet from remote to dec_ap_bio again.
751 * receiver receive_sizes(), comes here,
752 * waits for ap_bio_cnt == 0. -> deadlock.
753 * but this cannot happen, actually, because:
754 * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable
755 * (not connected, or bad/no disk on peer):
756 * see drbd_fail_request_early, ap_bio_cnt is zero.
757 * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET:
758 * peer may not initiate a resize.
759 */
3b98c0c2
LE		 760/* Note these are not to be confused with
761 * drbd_adm_suspend_io/drbd_adm_resume_io,
762 * which are (sub) state changes triggered by admin (drbdsetup),
763 * and can be long lived.
764 * This changes an mdev->flag, is triggered by drbd internals,
765 * and should be short-lived. */
b411b363
PR		 766void drbd_suspend_io(struct drbd_conf *mdev)
767{
768 set_bit(SUSPEND_IO, &mdev->flags);
2aebfabb 769 if (drbd_suspended(mdev))
265be2d0 770 return;
b411b363
PR		 771 wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt));
772}
773
774void drbd_resume_io(struct drbd_conf *mdev)
775{
776 clear_bit(SUSPEND_IO, &mdev->flags);
777 wake_up(&mdev->misc_wait);
778}
779
780/**
781 * drbd_determine_dev_size() - Sets the right device size obeying all constraints
782 * @mdev: DRBD device.
783 *
784 * Returns 0 on success, negative return values indicate errors.
785 * You should call drbd_md_sync() after calling this function.
786 */
24c4830c 787enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local)
b411b363
PR		 788{
789 sector_t prev_first_sect, prev_size; /* previous meta location */
ef5e44a6 790 sector_t la_size, u_size;
b411b363
PR		 791 sector_t size;
792 char ppb[10];
793
794 int md_moved, la_size_changed;
795 enum determine_dev_size rv = unchanged;
796
797 /* race:
798 * application request passes inc_ap_bio,
799 * but then cannot get an AL-reference.
800 * this function later may wait on ap_bio_cnt == 0. -> deadlock.
801 *
802 * to avoid that:
803 * Suspend IO right here.
804 * still lock the act_log to not trigger ASSERTs there.
805 */
806 drbd_suspend_io(mdev);
807
808 /* no wait necessary anymore, actually we could assert that */
809 wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
810
811 prev_first_sect = drbd_md_first_sector(mdev->ldev);
812 prev_size = mdev->ldev->md.md_size_sect;
813 la_size = mdev->ldev->md.la_size_sect;
814
815 /* TODO: should only be some assert here, not (re)init... */
816 drbd_md_set_sector_offsets(mdev, mdev->ldev);
817
daeda1cc
PR		 818 rcu_read_lock();
819 u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size;
820 rcu_read_unlock();
ef5e44a6 821 size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED);
b411b363
PR		 822
823 if (drbd_get_capacity(mdev->this_bdev) != size ||
824 drbd_bm_capacity(mdev) != size) {
825 int err;
02d9a94b 826 err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC));
b411b363
PR		 827 if (unlikely(err)) {
828 /* currently there is only one error: ENOMEM! */
829 size = drbd_bm_capacity(mdev)>>1;
830 if (size == 0) {
831 dev_err(DEV, "OUT OF MEMORY! "
832 "Could not allocate bitmap!\n");
833 } else {
834 dev_err(DEV, "BM resizing failed. "
835 "Leaving size unchanged at size = %lu KB\n",
836 (unsigned long)size);
837 }
838 rv = dev_size_error;
839 }
840 /* racy, see comments above. */
841 drbd_set_my_capacity(mdev, size);
842 mdev->ldev->md.la_size_sect = size;
843 dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1),
844 (unsigned long long)size>>1);
845 }
846 if (rv == dev_size_error)
847 goto out;
848
849 la_size_changed = (la_size != mdev->ldev->md.la_size_sect);
850
851 md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev)
852 || prev_size != mdev->ldev->md.md_size_sect;
853
854 if (la_size_changed || md_moved) {
24dccabb
AG		 855 int err;
856
b411b363
PR		 857 drbd_al_shrink(mdev); /* All extents inactive. */
858 dev_info(DEV, "Writing the whole bitmap, %s\n",
859 la_size_changed && md_moved ? "size changed and md moved" :
860 la_size_changed ? "size changed" : "md moved");
20ceb2b2
LE		 861 /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
862 err = drbd_bitmap_io(mdev, &drbd_bm_write,
863 "size changed", BM_LOCKED_MASK);
24dccabb
AG		 864 if (err) {
865 rv = dev_size_error;
866 goto out;
867 }
b411b363
PR		 868 drbd_md_mark_dirty(mdev);
869 }
870
871 if (size > la_size)
872 rv = grew;
873 if (size < la_size)
874 rv = shrunk;
875out:
876 lc_unlock(mdev->act_log);
877 wake_up(&mdev->al_wait);
878 drbd_resume_io(mdev);
879
880 return rv;
881}
882
883sector_t
ef5e44a6
PR		 884drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
885 sector_t u_size, int assume_peer_has_space)
b411b363
PR		 886{
887 sector_t p_size = mdev->p_size; /* partner's disk size. */
888 sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */
889 sector_t m_size; /* my size */
b411b363
PR		 890 sector_t size = 0;
891
892 m_size = drbd_get_max_capacity(bdev);
893
a393db6f
PR		 894 if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) {
895 dev_warn(DEV, "Resize while not connected was forced by the user!\n");
896 p_size = m_size;
897 }
898
b411b363
PR		 899 if (p_size && m_size) {
900 size = min_t(sector_t, p_size, m_size);
901 } else {
902 if (la_size) {
903 size = la_size;
904 if (m_size && m_size < size)
905 size = m_size;
906 if (p_size && p_size < size)
907 size = p_size;
908 } else {
909 if (m_size)
910 size = m_size;
911 if (p_size)
912 size = p_size;
913 }
914 }
915
916 if (size == 0)
917 dev_err(DEV, "Both nodes diskless!\n");
918
919 if (u_size) {
920 if (u_size > size)
921 dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n",
922 (unsigned long)u_size>>1, (unsigned long)size>>1);
923 else
924 size = u_size;
925 }
926
927 return size;
928}
929
930/**
931 * drbd_check_al_size() - Ensures that the AL is of the right size
932 * @mdev: DRBD device.
933 *
934 * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation
935 * failed, and 0 on success. You should call drbd_md_sync() after you called
936 * this function.
937 */
f399002e 938static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc)
b411b363
PR		 939{
940 struct lru_cache *n, *t;
941 struct lc_element *e;
942 unsigned int in_use;
943 int i;
944
b411b363 945 if (mdev->act_log &&
f399002e 946 mdev->act_log->nr_elements == dc->al_extents)
b411b363
PR		 947 return 0;
948
949 in_use = 0;
950 t = mdev->act_log;
7ad651b5 951 n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION,
f399002e 952 dc->al_extents, sizeof(struct lc_element), 0);
b411b363
PR		 953
954 if (n == NULL) {
955 dev_err(DEV, "Cannot allocate act_log lru!\n");
956 return -ENOMEM;
957 }
958 spin_lock_irq(&mdev->al_lock);
959 if (t) {
960 for (i = 0; i < t->nr_elements; i++) {
961 e = lc_element_by_index(t, i);
962 if (e->refcnt)
963 dev_err(DEV, "refcnt(%d)==%d\n",
964 e->lc_number, e->refcnt);
965 in_use += e->refcnt;
966 }
967 }
968 if (!in_use)
969 mdev->act_log = n;
970 spin_unlock_irq(&mdev->al_lock);
971 if (in_use) {
972 dev_err(DEV, "Activity log still in use!\n");
973 lc_destroy(n);
974 return -EBUSY;
975 } else {
976 if (t)
977 lc_destroy(t);
978 }
979 drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */
980 return 0;
981}
982
99432fcc 983static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size)
b411b363
PR		 984{
985 struct request_queue * const q = mdev->rq_queue;
99432fcc
PR		 986 int max_hw_sectors = max_bio_size >> 9;
987 int max_segments = 0;
988
989 if (get_ldev_if_state(mdev, D_ATTACHING)) {
990 struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
991
992 max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
daeda1cc
PR		 993 rcu_read_lock();
994 max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs;
995 rcu_read_unlock();
99432fcc
PR		 996 put_ldev(mdev);
997 }
b411b363 998
b411b363 999 blk_queue_logical_block_size(q, 512);
1816a2b4
LE		 1000 blk_queue_max_hw_sectors(q, max_hw_sectors);
1001 /* This is the workaround for "bio would need to, but cannot, be split" */
1002 blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
1003 blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1);
b411b363 1004
99432fcc
PR		 1005 if (get_ldev_if_state(mdev, D_ATTACHING)) {
1006 struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
1007
1008 blk_queue_stack_limits(q, b);
1009
1010 if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) {
1011 dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
1012 q->backing_dev_info.ra_pages,
1013 b->backing_dev_info.ra_pages);
1014 q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages;
1015 }
1016 put_ldev(mdev);
1017 }
1018}
1019
1020void drbd_reconsider_max_bio_size(struct drbd_conf *mdev)
1021{
1022 int now, new, local, peer;
1023
1024 now = queue_max_hw_sectors(mdev->rq_queue) << 9;
1025 local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */
1026 peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */
b411b363 1027
99432fcc
PR		 1028 if (get_ldev_if_state(mdev, D_ATTACHING)) {
1029 local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9;
1030 mdev->local_max_bio_size = local;
1031 put_ldev(mdev);
b411b363 1032 }
99432fcc
PR		 1033
1034 /* We may ignore peer limits if the peer is modern enough.
1035 Because new from 8.3.8 onwards the peer can use multiple
1036 BIOs for a single peer_request */
1037 if (mdev->state.conn >= C_CONNECTED) {
31890f4a 1038 if (mdev->tconn->agreed_pro_version < 94)
99432fcc 1039 peer = mdev->peer_max_bio_size;
31890f4a 1040 else if (mdev->tconn->agreed_pro_version == 94)
99432fcc
PR		 1041 peer = DRBD_MAX_SIZE_H80_PACKET;
1042 else /* drbd 8.3.8 onwards */
1043 peer = DRBD_MAX_BIO_SIZE;
1044 }
1045
1046 new = min_t(int, local, peer);
1047
1048 if (mdev->state.role == R_PRIMARY && new < now)
1049 dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now);
1050
1051 if (new != now)
1052 dev_info(DEV, "max BIO size = %u\n", new);
1053
1054 drbd_setup_queue_param(mdev, new);
b411b363
PR		 1055}
1056
a18e9d1e 1057/* Starts the worker thread */
0e29d163 1058static void conn_reconfig_start(struct drbd_tconn *tconn)
b411b363 1059{
0e29d163
PR		 1060 drbd_thread_start(&tconn->worker);
1061 conn_flush_workqueue(tconn);
b411b363
PR		 1062}
1063
a18e9d1e 1064/* if still unconfigured, stops worker again. */
0e29d163 1065static void conn_reconfig_done(struct drbd_tconn *tconn)
b411b363 1066{
992d6e91 1067 bool stop_threads;
0e29d163 1068 spin_lock_irq(&tconn->req_lock);
992d6e91 1069 stop_threads = conn_all_vols_unconf(tconn);
0e29d163 1070 spin_unlock_irq(&tconn->req_lock);
992d6e91
LE		 1071 if (stop_threads) {
1072 /* asender is implicitly stopped by receiver
81fa2e67 1073 * in conn_disconnect() */
992d6e91
LE		 1074 drbd_thread_stop(&tconn->receiver);
1075 drbd_thread_stop(&tconn->worker);
1076 }
b411b363
PR		 1077}
1078
0778286a
PR		 1079/* Make sure IO is suspended before calling this function(). */
1080static void drbd_suspend_al(struct drbd_conf *mdev)
1081{
1082 int s = 0;
1083
61610420 1084 if (!lc_try_lock(mdev->act_log)) {
0778286a
PR		 1085 dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n");
1086 return;
1087 }
1088
61610420 1089 drbd_al_shrink(mdev);
87eeee41 1090 spin_lock_irq(&mdev->tconn->req_lock);
0778286a
PR		 1091 if (mdev->state.conn < C_CONNECTED)
1092 s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags);
87eeee41 1093 spin_unlock_irq(&mdev->tconn->req_lock);
61610420 1094 lc_unlock(mdev->act_log);
0778286a
PR		 1095
1096 if (s)
1097 dev_info(DEV, "Suspended AL updates\n");
1098}
1099
5979e361
LE		 1100
1101static bool should_set_defaults(struct genl_info *info)
1102{
1103 unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags;
1104 return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS);
1105}
1106
d589a21e
PR		 1107static void enforce_disk_conf_limits(struct disk_conf *dc)
1108{
1109 if (dc->al_extents < DRBD_AL_EXTENTS_MIN)
1110 dc->al_extents = DRBD_AL_EXTENTS_MIN;
1111 if (dc->al_extents > DRBD_AL_EXTENTS_MAX)
1112 dc->al_extents = DRBD_AL_EXTENTS_MAX;
1113
1114 if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
1115 dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
1116}
1117
f399002e
LE		 1118int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
1119{
1120 enum drbd_ret_code retcode;
1121 struct drbd_conf *mdev;
daeda1cc 1122 struct disk_conf *new_disk_conf, *old_disk_conf;
813472ce 1123 struct fifo_buffer *old_plan = NULL, *new_plan = NULL;
f399002e 1124 int err, fifo_size;
f399002e
LE		 1125
1126 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
1127 if (!adm_ctx.reply_skb)
1128 return retcode;
1129 if (retcode != NO_ERROR)
1130 goto out;
1131
1132 mdev = adm_ctx.mdev;
1133
1134 /* we also need a disk
1135 * to change the options on */
1136 if (!get_ldev(mdev)) {
1137 retcode = ERR_NO_DISK;
1138 goto out;
1139 }
1140
daeda1cc 1141 new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
5ecc72c3 1142 if (!new_disk_conf) {
f399002e
LE		 1143 retcode = ERR_NOMEM;
1144 goto fail;
1145 }
1146
daeda1cc
PR		 1147 mutex_lock(&mdev->tconn->conf_update);
1148 old_disk_conf = mdev->ldev->disk_conf;
1149 *new_disk_conf = *old_disk_conf;
5979e361 1150 if (should_set_defaults(info))
b966b5dd 1151 set_disk_conf_defaults(new_disk_conf);
5979e361 1152
5ecc72c3 1153 err = disk_conf_from_attrs_for_change(new_disk_conf, info);
f399002e
LE		 1154 if (err) {
1155 retcode = ERR_MANDATORY_TAG;
1156 drbd_msg_put_info(from_attrs_err_to_txt(err));
1157 }
1158
5ecc72c3
LE		 1159 if (!expect(new_disk_conf->resync_rate >= 1))
1160 new_disk_conf->resync_rate = 1;
f399002e 1161
d589a21e 1162 enforce_disk_conf_limits(new_disk_conf);
f399002e 1163
5ecc72c3 1164 fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
9958c857 1165 if (fifo_size != mdev->rs_plan_s->size) {
813472ce
PR		 1166 new_plan = fifo_alloc(fifo_size);
1167 if (!new_plan) {
f399002e
LE		 1168 dev_err(DEV, "kmalloc of fifo_buffer failed");
1169 retcode = ERR_NOMEM;
daeda1cc 1170 goto fail_unlock;
f399002e
LE		 1171 }
1172 }
1173
f399002e
LE		 1174 wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
1175 drbd_al_shrink(mdev);
5ecc72c3 1176 err = drbd_check_al_size(mdev, new_disk_conf);
f399002e
LE		 1177 lc_unlock(mdev->act_log);
1178 wake_up(&mdev->al_wait);
1179
1180 if (err) {
1181 retcode = ERR_NOMEM;
daeda1cc 1182 goto fail_unlock;
f399002e
LE		 1183 }
1184
dc97b708
PR		 1185 write_lock_irq(&global_state_lock);
1186 retcode = drbd_sync_after_valid(mdev, new_disk_conf->resync_after);
1187 if (retcode == NO_ERROR) {
daeda1cc 1188 rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
dc97b708
PR		 1189 drbd_sync_after_changed(mdev);
1190 }
1191 write_unlock_irq(&global_state_lock);
f399002e 1192
daeda1cc
PR		 1193 if (retcode != NO_ERROR)
1194 goto fail_unlock;
f399002e 1195
813472ce
PR		 1196 if (new_plan) {
1197 old_plan = mdev->rs_plan_s;
1198 rcu_assign_pointer(mdev->rs_plan_s, new_plan);
9958c857 1199 }
9958c857 1200
c141ebda 1201 mutex_unlock(&mdev->tconn->conf_update);
daeda1cc 1202 drbd_md_sync(mdev);
f399002e
LE		 1203
1204 if (mdev->state.conn >= C_CONNECTED)
1205 drbd_send_sync_param(mdev);
1206
daeda1cc
PR		 1207 synchronize_rcu();
1208 kfree(old_disk_conf);
813472ce 1209 kfree(old_plan);
daeda1cc
PR		 1210 goto success;
1211
1212fail_unlock:
1213 mutex_unlock(&mdev->tconn->conf_update);
f399002e 1214 fail:
5ecc72c3 1215 kfree(new_disk_conf);
813472ce 1216 kfree(new_plan);
daeda1cc
PR		 1217success:
1218 put_ldev(mdev);
f399002e
LE		 1219 out:
1220 drbd_adm_finish(info, retcode);
1221 return 0;
1222}
1223
3b98c0c2 1224int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
b411b363 1225{
3b98c0c2
LE		 1226 struct drbd_conf *mdev;
1227 int err;
116676ca 1228 enum drbd_ret_code retcode;
b411b363
PR		 1229 enum determine_dev_size dd;
1230 sector_t max_possible_sectors;
1231 sector_t min_md_device_sectors;
1232 struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */
daeda1cc 1233 struct disk_conf *new_disk_conf = NULL;
e525fd89 1234 struct block_device *bdev;
b411b363 1235 struct lru_cache *resync_lru = NULL;
9958c857 1236 struct fifo_buffer *new_plan = NULL;
b411b363 1237 union drbd_state ns, os;
f2024e7c 1238 enum drbd_state_rv rv;
44ed167d 1239 struct net_conf *nc;
b411b363 1240 int cp_discovered = 0;
b411b363 1241
3b98c0c2
LE		 1242 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
1243 if (!adm_ctx.reply_skb)
1244 return retcode;
1245 if (retcode != NO_ERROR)
40cbf085 1246 goto finish;
3b98c0c2
LE		 1247
1248 mdev = adm_ctx.mdev;
0e29d163 1249 conn_reconfig_start(mdev->tconn);
b411b363
PR		 1250
1251 /* if you want to reconfigure, please tear down first */
1252 if (mdev->state.disk > D_DISKLESS) {
1253 retcode = ERR_DISK_CONFIGURED;
1254 goto fail;
1255 }
82f59cc6
LE		 1256 /* It may just now have detached because of IO error. Make sure
1257 * drbd_ldev_destroy is done already, we may end up here very fast,
1258 * e.g. if someone calls attach from the on-io-error handler,
1259 * to realize a "hot spare" feature (not that I'd recommend that) */
1260 wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt));
b411b363 1261
3b98c0c2 1262 /* allocation not in the IO path, drbdsetup context */
b411b363
PR		 1263 nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL);
1264 if (!nbc) {
1265 retcode = ERR_NOMEM;
1266 goto fail;
1267 }
daeda1cc
PR		 1268 new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL);
1269 if (!new_disk_conf) {
1270 retcode = ERR_NOMEM;
1271 goto fail;
1272 }
1273 nbc->disk_conf = new_disk_conf;
b411b363 1274
daeda1cc
PR		 1275 set_disk_conf_defaults(new_disk_conf);
1276 err = disk_conf_from_attrs(new_disk_conf, info);
3b98c0c2 1277 if (err) {
b411b363 1278 retcode = ERR_MANDATORY_TAG;
3b98c0c2 1279 drbd_msg_put_info(from_attrs_err_to_txt(err));
b411b363
PR		 1280 goto fail;
1281 }
1282
d589a21e
PR		 1283 enforce_disk_conf_limits(new_disk_conf);
1284
9958c857
PR		 1285 new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ);
1286 if (!new_plan) {
1287 retcode = ERR_NOMEM;
1288 goto fail;
1289 }
1290
daeda1cc 1291 if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) {
b411b363
PR		 1292 retcode = ERR_MD_IDX_INVALID;
1293 goto fail;
1294 }
1295
44ed167d
PR		 1296 rcu_read_lock();
1297 nc = rcu_dereference(mdev->tconn->net_conf);
1298 if (nc) {
daeda1cc 1299 if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) {
44ed167d 1300 rcu_read_unlock();
47ff2d0a
PR		 1301 retcode = ERR_STONITH_AND_PROT_A;
1302 goto fail;
1303 }
1304 }
44ed167d 1305 rcu_read_unlock();
47ff2d0a 1306
daeda1cc 1307 bdev = blkdev_get_by_path(new_disk_conf->backing_dev,
d4d77629 1308 FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev);
e525fd89 1309 if (IS_ERR(bdev)) {
daeda1cc 1310 dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev,
e525fd89 1311 PTR_ERR(bdev));
b411b363
PR		 1312 retcode = ERR_OPEN_DISK;
1313 goto fail;
1314 }
e525fd89
TH		 1315 nbc->backing_bdev = bdev;
1316
1317 /*
1318 * meta_dev_idx >= 0: external fixed size, possibly multiple
1319 * drbd sharing one meta device. TODO in that case, paranoia
1320 * check that [md_bdev, meta_dev_idx] is not yet used by some
1321 * other drbd minor! (if you use drbd.conf + drbdadm, that
1322 * should check it for you already; but if you don't, or
1323 * someone fooled it, we need to double check here)
1324 */
daeda1cc 1325 bdev = blkdev_get_by_path(new_disk_conf->meta_dev,
d4d77629 1326 FMODE_READ | FMODE_WRITE | FMODE_EXCL,
daeda1cc 1327 (new_disk_conf->meta_dev_idx < 0) ?
d4d77629 1328 (void *)mdev : (void *)drbd_m_holder);
e525fd89 1329 if (IS_ERR(bdev)) {
daeda1cc 1330 dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev,
e525fd89 1331 PTR_ERR(bdev));
b411b363
PR		 1332 retcode = ERR_OPEN_MD_DISK;
1333 goto fail;
1334 }
e525fd89 1335 nbc->md_bdev = bdev;
b411b363 1336
e525fd89 1337 if ((nbc->backing_bdev == nbc->md_bdev) !=
daeda1cc
PR		 1338 (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL ||
1339 new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) {
e525fd89 1340 retcode = ERR_MD_IDX_INVALID;
b411b363
PR		 1341 goto fail;
1342 }
1343
1344 resync_lru = lc_create("resync", drbd_bm_ext_cache,
46a15bc3 1345 1, 61, sizeof(struct bm_extent),
b411b363
PR		 1346 offsetof(struct bm_extent, lce));
1347 if (!resync_lru) {
1348 retcode = ERR_NOMEM;
e525fd89 1349 goto fail;
b411b363
PR		 1350 }
1351
1352 /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */
1353 drbd_md_set_sector_offsets(mdev, nbc);
1354
daeda1cc 1355 if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) {
b411b363
PR		 1356 dev_err(DEV, "max capacity %llu smaller than disk size %llu\n",
1357 (unsigned long long) drbd_get_max_capacity(nbc),
daeda1cc 1358 (unsigned long long) new_disk_conf->disk_size);
b411b363 1359 retcode = ERR_DISK_TO_SMALL;
e525fd89 1360 goto fail;
b411b363
PR		 1361 }
1362
daeda1cc 1363 if (new_disk_conf->meta_dev_idx < 0) {
b411b363
PR		 1364 max_possible_sectors = DRBD_MAX_SECTORS_FLEX;
1365 /* at least one MB, otherwise it does not make sense */
1366 min_md_device_sectors = (2<<10);
1367 } else {
1368 max_possible_sectors = DRBD_MAX_SECTORS;
daeda1cc 1369 min_md_device_sectors = MD_RESERVED_SECT * (new_disk_conf->meta_dev_idx + 1);
b411b363
PR		 1370 }
1371
b411b363
PR		 1372 if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) {
1373 retcode = ERR_MD_DISK_TO_SMALL;
1374 dev_warn(DEV, "refusing attach: md-device too small, "
1375 "at least %llu sectors needed for this meta-disk type\n",
1376 (unsigned long long) min_md_device_sectors);
e525fd89 1377 goto fail;
b411b363
PR		 1378 }
1379
1380 /* Make sure the new disk is big enough
1381 * (we may currently be R_PRIMARY with no local disk...) */
1382 if (drbd_get_max_capacity(nbc) <
1383 drbd_get_capacity(mdev->this_bdev)) {
1384 retcode = ERR_DISK_TO_SMALL;
e525fd89 1385 goto fail;
b411b363
PR		 1386 }
1387
1388 nbc->known_size = drbd_get_capacity(nbc->backing_bdev);
1389
1352994b
LE		 1390 if (nbc->known_size > max_possible_sectors) {
1391 dev_warn(DEV, "==> truncating very big lower level device "
1392 "to currently maximum possible %llu sectors <==\n",
1393 (unsigned long long) max_possible_sectors);
daeda1cc 1394 if (new_disk_conf->meta_dev_idx >= 0)
1352994b
LE		 1395 dev_warn(DEV, "==>> using internal or flexible "
1396 "meta data may help <<==\n");
1397 }
1398
b411b363
PR		 1399 drbd_suspend_io(mdev);
1400 /* also wait for the last barrier ack. */
2aebfabb 1401 wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev));
b411b363 1402 /* and for any other previously queued work */
a21e9298 1403 drbd_flush_workqueue(mdev);
b411b363 1404
f2024e7c
AG		 1405 rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE);
1406 retcode = rv; /* FIXME: Type mismatch. */
b411b363 1407 drbd_resume_io(mdev);
f2024e7c 1408 if (rv < SS_SUCCESS)
e525fd89 1409 goto fail;
b411b363
PR		 1410
1411 if (!get_ldev_if_state(mdev, D_ATTACHING))
1412 goto force_diskless;
1413
1414 drbd_md_set_sector_offsets(mdev, nbc);
1415
1416 if (!mdev->bitmap) {
1417 if (drbd_bm_init(mdev)) {
1418 retcode = ERR_NOMEM;
1419 goto force_diskless_dec;
1420 }
1421 }
1422
1423 retcode = drbd_md_read(mdev, nbc);
1424 if (retcode != NO_ERROR)
1425 goto force_diskless_dec;
1426
1427 if (mdev->state.conn < C_CONNECTED &&
1428 mdev->state.role == R_PRIMARY &&
1429 (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
1430 dev_err(DEV, "Can only attach to data with current UUID=%016llX\n",
1431 (unsigned long long)mdev->ed_uuid);
1432 retcode = ERR_DATA_NOT_CURRENT;
1433 goto force_diskless_dec;
1434 }
1435
1436 /* Since we are diskless, fix the activity log first... */
daeda1cc 1437 if (drbd_check_al_size(mdev, new_disk_conf)) {
b411b363
PR		 1438 retcode = ERR_NOMEM;
1439 goto force_diskless_dec;
1440 }
1441
1442 /* Prevent shrinking of consistent devices ! */
1443 if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
daeda1cc 1444 drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) {
b411b363
PR		 1445 dev_warn(DEV, "refusing to truncate a consistent device\n");
1446 retcode = ERR_DISK_TO_SMALL;
1447 goto force_diskless_dec;
1448 }
1449
1450 if (!drbd_al_read_log(mdev, nbc)) {
1451 retcode = ERR_IO_MD_DISK;
1452 goto force_diskless_dec;
1453 }
1454
b411b363
PR		 1455 /* Reset the "barriers don't work" bits here, then force meta data to
1456 * be written, to ensure we determine if barriers are supported. */
e544046a 1457 if (new_disk_conf->md_flushes)
a8a4e51e 1458 clear_bit(MD_NO_FUA, &mdev->flags);
e544046a
AG		 1459 else
1460 set_bit(MD_NO_FUA, &mdev->flags);
b411b363
PR		 1461
1462 /* Point of no return reached.
1463 * Devices and memory are no longer released by error cleanup below.
1464 * now mdev takes over responsibility, and the state engine should
1465 * clean it up somewhere. */
1466 D_ASSERT(mdev->ldev == NULL);
1467 mdev->ldev = nbc;
1468 mdev->resync = resync_lru;
9958c857 1469 mdev->rs_plan_s = new_plan;
b411b363
PR		 1470 nbc = NULL;
1471 resync_lru = NULL;
daeda1cc 1472 new_disk_conf = NULL;
9958c857 1473 new_plan = NULL;
b411b363 1474
2451fc3b
PR		 1475 mdev->write_ordering = WO_bdev_flush;
1476 drbd_bump_write_ordering(mdev, WO_bdev_flush);
b411b363
PR		 1477
1478 if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY))
1479 set_bit(CRASHED_PRIMARY, &mdev->flags);
1480 else
1481 clear_bit(CRASHED_PRIMARY, &mdev->flags);
1482
894c6a94 1483 if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
da9fbc27 1484 !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) {
b411b363
PR		 1485 set_bit(CRASHED_PRIMARY, &mdev->flags);
1486 cp_discovered = 1;
1487 }
1488
1489 mdev->send_cnt = 0;
1490 mdev->recv_cnt = 0;
1491 mdev->read_cnt = 0;
1492 mdev->writ_cnt = 0;
1493
99432fcc 1494 drbd_reconsider_max_bio_size(mdev);
b411b363
PR		 1495
1496 /* If I am currently not R_PRIMARY,
1497 * but meta data primary indicator is set,
1498 * I just now recover from a hard crash,
1499 * and have been R_PRIMARY before that crash.
1500 *
1501 * Now, if I had no connection before that crash
1502 * (have been degraded R_PRIMARY), chances are that
1503 * I won't find my peer now either.
1504 *
1505 * In that case, and _only_ in that case,
1506 * we use the degr-wfc-timeout instead of the default,
1507 * so we can automatically recover from a crash of a
1508 * degraded but active "cluster" after a certain timeout.
1509 */
1510 clear_bit(USE_DEGR_WFC_T, &mdev->flags);
1511 if (mdev->state.role != R_PRIMARY &&
1512 drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
1513 !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND))
1514 set_bit(USE_DEGR_WFC_T, &mdev->flags);
1515
24c4830c 1516 dd = drbd_determine_dev_size(mdev, 0);
b411b363
PR		 1517 if (dd == dev_size_error) {
1518 retcode = ERR_NOMEM_BITMAP;
1519 goto force_diskless_dec;
1520 } else if (dd == grew)
1521 set_bit(RESYNC_AFTER_NEG, &mdev->flags);
1522
1523 if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) {
1524 dev_info(DEV, "Assuming that all blocks are out of sync "
1525 "(aka FullSync)\n");
20ceb2b2
LE		 1526 if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write,
1527 "set_n_write from attaching", BM_LOCKED_MASK)) {
b411b363
PR		 1528 retcode = ERR_IO_MD_DISK;
1529 goto force_diskless_dec;
1530 }
1531 } else {
20ceb2b2 1532 if (drbd_bitmap_io(mdev, &drbd_bm_read,
22ab6a30 1533 "read from attaching", BM_LOCKED_MASK)) {
b411b363
PR		 1534 retcode = ERR_IO_MD_DISK;
1535 goto force_diskless_dec;
1536 }
1537 }
1538
1539 if (cp_discovered) {
1540 drbd_al_apply_to_bm(mdev);
20ceb2b2
LE		 1541 if (drbd_bitmap_io(mdev, &drbd_bm_write,
1542 "crashed primary apply AL", BM_LOCKED_MASK)) {
19f843aa
LE		 1543 retcode = ERR_IO_MD_DISK;
1544 goto force_diskless_dec;
1545 }
b411b363
PR		 1546 }
1547
0778286a
PR		 1548 if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev))
1549 drbd_suspend_al(mdev); /* IO is still suspended here... */
1550
87eeee41 1551 spin_lock_irq(&mdev->tconn->req_lock);
78bae59b
PR		 1552 os = drbd_read_state(mdev);
1553 ns = os;
b411b363
PR		 1554 /* If MDF_CONSISTENT is not set go into inconsistent state,
1555 otherwise investigate MDF_WasUpToDate...
1556 If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
1557 otherwise into D_CONSISTENT state.
1558 */
1559 if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) {
1560 if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE))
1561 ns.disk = D_CONSISTENT;
1562 else
1563 ns.disk = D_OUTDATED;
1564 } else {
1565 ns.disk = D_INCONSISTENT;
1566 }
1567
1568 if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED))
1569 ns.pdsk = D_OUTDATED;
1570
daeda1cc
PR		 1571 rcu_read_lock();
1572 if (ns.disk == D_CONSISTENT &&
1573 (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE))
b411b363 1574 ns.disk = D_UP_TO_DATE;
daeda1cc 1575 rcu_read_unlock();
b411b363
PR		 1576
1577 /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
1578 MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
1579 this point, because drbd_request_state() modifies these
1580 flags. */
1581
1582 /* In case we are C_CONNECTED postpone any decision on the new disk
1583 state after the negotiation phase. */
1584 if (mdev->state.conn == C_CONNECTED) {
1585 mdev->new_state_tmp.i = ns.i;
1586 ns.i = os.i;
1587 ns.disk = D_NEGOTIATING;
dc66c74d
PR		 1588
1589 /* We expect to receive up-to-date UUIDs soon.
1590 To avoid a race in receive_state, free p_uuid while
1591 holding req_lock. I.e. atomic with the state change */
1592 kfree(mdev->p_uuid);
1593 mdev->p_uuid = NULL;
b411b363
PR		 1594 }
1595
1596 rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
87eeee41 1597 spin_unlock_irq(&mdev->tconn->req_lock);
b411b363
PR		 1598
1599 if (rv < SS_SUCCESS)
1600 goto force_diskless_dec;
1601
1602 if (mdev->state.role == R_PRIMARY)
1603 mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
1604 else
1605 mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
1606
1607 drbd_md_mark_dirty(mdev);
1608 drbd_md_sync(mdev);
1609
1610 kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
1611 put_ldev(mdev);
0e29d163 1612 conn_reconfig_done(mdev->tconn);
3b98c0c2 1613 drbd_adm_finish(info, retcode);
b411b363
PR		 1614 return 0;
1615
1616 force_diskless_dec:
1617 put_ldev(mdev);
1618 force_diskless:
82f59cc6 1619 drbd_force_state(mdev, NS(disk, D_FAILED));
b411b363 1620 drbd_md_sync(mdev);
b411b363 1621 fail:
40cbf085 1622 conn_reconfig_done(mdev->tconn);
b411b363 1623 if (nbc) {
e525fd89
TH		 1624 if (nbc->backing_bdev)
1625 blkdev_put(nbc->backing_bdev,
1626 FMODE_READ | FMODE_WRITE | FMODE_EXCL);
1627 if (nbc->md_bdev)
1628 blkdev_put(nbc->md_bdev,
1629 FMODE_READ | FMODE_WRITE | FMODE_EXCL);
b411b363
PR		 1630 kfree(nbc);
1631 }
daeda1cc 1632 kfree(new_disk_conf);
b411b363 1633 lc_destroy(resync_lru);
9958c857 1634 kfree(new_plan);
b411b363 1635
40cbf085 1636 finish:
3b98c0c2 1637 drbd_adm_finish(info, retcode);
b411b363
PR		 1638 return 0;
1639}
1640
85f75dd7
LE		 1641static int adm_detach(struct drbd_conf *mdev)
1642{
19f83c76 1643 enum drbd_state_rv retcode;
009ba89d 1644 int ret;
85f75dd7 1645 drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
009ba89d
LE		 1646 retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
1647 /* D_FAILED will transition to DISKLESS. */
1648 ret = wait_event_interruptible(mdev->misc_wait,
1649 mdev->state.disk != D_FAILED);
85f75dd7 1650 drbd_resume_io(mdev);
009ba89d
LE		 1651 if ((int)retcode == (int)SS_IS_DISKLESS)
1652 retcode = SS_NOTHING_TO_DO;
1653 if (ret)
1654 retcode = ERR_INTR;
85f75dd7
LE		 1655 return retcode;
1656}
1657
82f59cc6
LE		 1658/* Detaching the disk is a process in multiple stages. First we need to lock
1659 * out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
1660 * Then we transition to D_DISKLESS, and wait for put_ldev() to return all
1661 * internal references as well.
1662 * Only then we have finally detached. */
3b98c0c2 1663int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info)
b411b363 1664{
9a0d9d03 1665 enum drbd_ret_code retcode;
3b98c0c2
LE		 1666
1667 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
1668 if (!adm_ctx.reply_skb)
1669 return retcode;
1670 if (retcode != NO_ERROR)
1671 goto out;
1672
85f75dd7 1673 retcode = adm_detach(adm_ctx.mdev);
3b98c0c2
LE		 1674out:
1675 drbd_adm_finish(info, retcode);
b411b363
PR		 1676 return 0;
1677}
1678
f399002e
LE		 1679static bool conn_resync_running(struct drbd_tconn *tconn)
1680{
1681 struct drbd_conf *mdev;
695d08fa 1682 bool rv = false;
f399002e
LE		 1683 int vnr;
1684
695d08fa 1685 rcu_read_lock();
f399002e
LE		 1686 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
1687 if (mdev->state.conn == C_SYNC_SOURCE ||
1688 mdev->state.conn == C_SYNC_TARGET ||
1689 mdev->state.conn == C_PAUSED_SYNC_S ||
695d08fa
PR		 1690 mdev->state.conn == C_PAUSED_SYNC_T) {
1691 rv = true;
1692 break;
1693 }
f399002e 1694 }
695d08fa
PR		 1695 rcu_read_unlock();
1696
1697 return rv;
f399002e
LE		 1698}
1699
1700static bool conn_ov_running(struct drbd_tconn *tconn)
1701{
1702 struct drbd_conf *mdev;
695d08fa 1703 bool rv = false;
f399002e
LE		 1704 int vnr;
1705
695d08fa 1706 rcu_read_lock();
f399002e
LE		 1707 idr_for_each_entry(&tconn->volumes, mdev, vnr) {
1708 if (mdev->state.conn == C_VERIFY_S ||
695d08fa
PR		 1709 mdev->state.conn == C_VERIFY_T) {
1710 rv = true;
1711 break;
1712 }
f399002e 1713 }
695d08fa
PR		 1714 rcu_read_unlock();
1715
1716 return rv;
f399002e
LE		 1717}
1718
cd64397c 1719static enum drbd_ret_code
44ed167d 1720_check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf)
cd64397c
PR		 1721{
1722 struct drbd_conf *mdev;
1723 int i;
1724
44ed167d 1725 if (old_conf && tconn->agreed_pro_version < 100 &&
b032b6fa 1726 tconn->cstate == C_WF_REPORT_PARAMS &&
44ed167d 1727 new_conf->wire_protocol != old_conf->wire_protocol)
b032b6fa
PR		 1728 return ERR_NEED_APV_100;
1729
cd64397c
PR		 1730 if (new_conf->two_primaries &&
1731 (new_conf->wire_protocol != DRBD_PROT_C))
1732 return ERR_NOT_PROTO_C;
1733
cd64397c
PR		 1734 idr_for_each_entry(&tconn->volumes, mdev, i) {
1735 if (get_ldev(mdev)) {
daeda1cc 1736 enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing;
cd64397c 1737 put_ldev(mdev);
44ed167d 1738 if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH)
cd64397c 1739 return ERR_STONITH_AND_PROT_A;
cd64397c 1740 }
44ed167d 1741 if (mdev->state.role == R_PRIMARY && new_conf->want_lose)
cd64397c 1742 return ERR_DISCARD;
cd64397c 1743 }
cd64397c
PR		 1744
1745 if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A)
1746 return ERR_CONG_NOT_PROTO_A;
1747
1748 return NO_ERROR;
1749}
1750
44ed167d
PR		 1751static enum drbd_ret_code
1752check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
1753{
1754 static enum drbd_ret_code rv;
1755 struct drbd_conf *mdev;
1756 int i;
1757
1758 rcu_read_lock();
1759 rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf);
1760 rcu_read_unlock();
1761
1762 /* tconn->volumes protected by genl_lock() here */
1763 idr_for_each_entry(&tconn->volumes, mdev, i) {
1764 if (!mdev->bitmap) {
1765 if(drbd_bm_init(mdev))
1766 return ERR_NOMEM;
1767 }
1768 }
1769
1770 return rv;
1771}
1772
0fd0ea06
PR		 1773struct crypto {
1774 struct crypto_hash *verify_tfm;
1775 struct crypto_hash *csums_tfm;
1776 struct crypto_hash *cram_hmac_tfm;
8d412fc6 1777 struct crypto_hash *integrity_tfm;
0fd0ea06
PR		 1778 void *int_dig_in;
1779 void *int_dig_vv;
1780};
1781
1782static int
4b6ad6d4 1783alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg)
0fd0ea06
PR		 1784{
1785 if (!tfm_name[0])
1786 return NO_ERROR;
1787
1788 *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC);
1789 if (IS_ERR(*tfm)) {
1790 *tfm = NULL;
1791 return err_alg;
1792 }
1793
0fd0ea06
PR		 1794 return NO_ERROR;
1795}
1796
1797static enum drbd_ret_code
1798alloc_crypto(struct crypto *crypto, struct net_conf *new_conf)
1799{
1800 char hmac_name[CRYPTO_MAX_ALG_NAME];
1801 enum drbd_ret_code rv;
1802 int hash_size;
1803
4b6ad6d4
AG		 1804 rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg,
1805 ERR_CSUMS_ALG);
0fd0ea06
PR		 1806 if (rv != NO_ERROR)
1807 return rv;
4b6ad6d4
AG		 1808 rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg,
1809 ERR_VERIFY_ALG);
0fd0ea06
PR		 1810 if (rv != NO_ERROR)
1811 return rv;
4b6ad6d4
AG		 1812 rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg,
1813 ERR_INTEGRITY_ALG);
0fd0ea06
PR		 1814 if (rv != NO_ERROR)
1815 return rv;
0fd0ea06
PR		 1816 if (new_conf->cram_hmac_alg[0] != 0) {
1817 snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
1818 new_conf->cram_hmac_alg);
1819
4b6ad6d4
AG		 1820 rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name,
1821 ERR_AUTH_ALG);
0fd0ea06 1822 }
8d412fc6
AG		 1823 if (crypto->integrity_tfm) {
1824 hash_size = crypto_hash_digestsize(crypto->integrity_tfm);
0fd0ea06
PR		 1825 crypto->int_dig_in = kmalloc(hash_size, GFP_KERNEL);
1826 if (!crypto->int_dig_in)
1827 return ERR_NOMEM;
1828 crypto->int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
1829 if (!crypto->int_dig_vv)
1830 return ERR_NOMEM;
1831 }
1832
1833 return rv;
1834}
1835
1836static void free_crypto(struct crypto *crypto)
1837{
1838 kfree(crypto->int_dig_in);
1839 kfree(crypto->int_dig_vv);
1840 crypto_free_hash(crypto->cram_hmac_tfm);
8d412fc6 1841 crypto_free_hash(crypto->integrity_tfm);
0fd0ea06
PR		 1842 crypto_free_hash(crypto->csums_tfm);
1843 crypto_free_hash(crypto->verify_tfm);
1844}
1845
f399002e
LE		 1846int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
1847{
1848 enum drbd_ret_code retcode;
1849 struct drbd_tconn *tconn;
44ed167d 1850 struct net_conf *old_conf, *new_conf = NULL;
f399002e
LE		 1851 int err;
1852 int ovr; /* online verify running */
1853 int rsr; /* re-sync running */
0fd0ea06 1854 struct crypto crypto = { };
88104ca4 1855 bool change_integrity_alg;
f399002e
LE		 1856
1857 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
1858 if (!adm_ctx.reply_skb)
1859 return retcode;
1860 if (retcode != NO_ERROR)
1861 goto out;
1862
1863 tconn = adm_ctx.tconn;
1864
1865 new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
1866 if (!new_conf) {
1867 retcode = ERR_NOMEM;
1868 goto out;
1869 }
1870
44ed167d
PR		 1871 conn_reconfig_start(tconn);
1872
88104ca4 1873 mutex_lock(&tconn->data.mutex);
a0095508 1874 mutex_lock(&tconn->conf_update);
91fd4dad 1875 old_conf = tconn->net_conf;
44ed167d
PR		 1876
1877 if (!old_conf) {
f399002e
LE		 1878 drbd_msg_put_info("net conf missing, try connect");
1879 retcode = ERR_INVALID_REQUEST;
91fd4dad 1880 goto fail;
f399002e
LE		 1881 }
1882
44ed167d 1883 *new_conf = *old_conf;
5979e361 1884 if (should_set_defaults(info))
b966b5dd 1885 set_net_conf_defaults(new_conf);
f399002e 1886
f399002e
LE		 1887 err = net_conf_from_attrs_for_change(new_conf, info);
1888 if (err) {
1889 retcode = ERR_MANDATORY_TAG;
1890 drbd_msg_put_info(from_attrs_err_to_txt(err));
1891 goto fail;
1892 }
1893
cd64397c
PR		 1894 retcode = check_net_options(tconn, new_conf);
1895 if (retcode != NO_ERROR)
1896 goto fail;
1897
f399002e
LE		 1898 /* re-sync running */
1899 rsr = conn_resync_running(tconn);
0fd0ea06 1900 if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) {
f399002e 1901 retcode = ERR_CSUMS_RESYNC_RUNNING;
91fd4dad 1902 goto fail;
f399002e
LE		 1903 }
1904
f399002e
LE		 1905 /* online verify running */
1906 ovr = conn_ov_running(tconn);
0fd0ea06
PR		 1907 if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) {
1908 retcode = ERR_VERIFY_RUNNING;
1909 goto fail;
f399002e
LE		 1910 }
1911
88104ca4
AG		 1912 change_integrity_alg = strcmp(old_conf->integrity_alg,
1913 new_conf->integrity_alg);
1914
0fd0ea06
PR		 1915 retcode = alloc_crypto(&crypto, new_conf);
1916 if (retcode != NO_ERROR)
1917 goto fail;
f399002e 1918
44ed167d 1919 rcu_assign_pointer(tconn->net_conf, new_conf);
f399002e
LE		 1920
1921 if (!rsr) {
1922 crypto_free_hash(tconn->csums_tfm);
0fd0ea06
PR		 1923 tconn->csums_tfm = crypto.csums_tfm;
1924 crypto.csums_tfm = NULL;
f399002e
LE		 1925 }
1926 if (!ovr) {
1927 crypto_free_hash(tconn->verify_tfm);
0fd0ea06
PR		 1928 tconn->verify_tfm = crypto.verify_tfm;
1929 crypto.verify_tfm = NULL;
f399002e
LE		 1930 }
1931
0fd0ea06
PR		 1932 kfree(tconn->int_dig_in);
1933 tconn->int_dig_in = crypto.int_dig_in;
1934 kfree(tconn->int_dig_vv);
1935 tconn->int_dig_vv = crypto.int_dig_vv;
8d412fc6
AG		 1936 crypto_free_hash(tconn->integrity_tfm);
1937 tconn->integrity_tfm = crypto.integrity_tfm;
88104ca4
AG		 1938 if (change_integrity_alg) {
1939 /* Do this without trying to take tconn->data.mutex again. */
1940 if (__drbd_send_protocol(tconn))
1941 goto fail;
1942 }
0fd0ea06
PR		 1943
1944 /* FIXME Changing cram_hmac while the connection is established is useless */
1945 crypto_free_hash(tconn->cram_hmac_tfm);
1946 tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
1947
a0095508 1948 mutex_unlock(&tconn->conf_update);
88104ca4 1949 mutex_unlock(&tconn->data.mutex);
91fd4dad
PR		 1950 synchronize_rcu();
1951 kfree(old_conf);
1952
f399002e
LE		 1953 if (tconn->cstate >= C_WF_REPORT_PARAMS)
1954 drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn)));
1955
91fd4dad
PR		 1956 goto done;
1957
f399002e 1958 fail:
a0095508 1959 mutex_unlock(&tconn->conf_update);
88104ca4 1960 mutex_unlock(&tconn->data.mutex);
0fd0ea06 1961 free_crypto(&crypto);
f399002e 1962 kfree(new_conf);
91fd4dad 1963 done:
f399002e
LE		 1964 conn_reconfig_done(tconn);
1965 out:
1966 drbd_adm_finish(info, retcode);
1967 return 0;
1968}
1969
3b98c0c2 1970int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
b411b363 1971{
3b98c0c2 1972 struct drbd_conf *mdev;
44ed167d 1973 struct net_conf *old_conf, *new_conf = NULL;
0fd0ea06 1974 struct crypto crypto = { };
80883197 1975 struct drbd_tconn *oconn;
3b98c0c2 1976 struct drbd_tconn *tconn;
b411b363 1977 struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr;
3b98c0c2
LE		 1978 enum drbd_ret_code retcode;
1979 int i;
1980 int err;
b411b363 1981
3b98c0c2
LE		 1982 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
1983 if (!adm_ctx.reply_skb)
1984 return retcode;
1985 if (retcode != NO_ERROR)
1986 goto out;
1987
1988 tconn = adm_ctx.tconn;
80883197 1989 conn_reconfig_start(tconn);
b411b363 1990
80883197 1991 if (tconn->cstate > C_STANDALONE) {
b411b363
PR		 1992 retcode = ERR_NET_CONFIGURED;
1993 goto fail;
1994 }
1995
1996 /* allocation not in the IO path, cqueue thread context */
5979e361 1997 new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL);
b411b363
PR		 1998 if (!new_conf) {
1999 retcode = ERR_NOMEM;
2000 goto fail;
2001 }
2002
b966b5dd 2003 set_net_conf_defaults(new_conf);
f399002e
LE		 2004
2005 err = net_conf_from_attrs(new_conf, info);
3b98c0c2 2006 if (err) {
b411b363 2007 retcode = ERR_MANDATORY_TAG;
3b98c0c2 2008 drbd_msg_put_info(from_attrs_err_to_txt(err));
b411b363
PR		 2009 goto fail;
2010 }
2011
cd64397c
PR		 2012 retcode = check_net_options(tconn, new_conf);
2013 if (retcode != NO_ERROR)
422028b1 2014 goto fail;
422028b1 2015
b411b363
PR		 2016 retcode = NO_ERROR;
2017
2018 new_my_addr = (struct sockaddr *)&new_conf->my_addr;
2019 new_peer_addr = (struct sockaddr *)&new_conf->peer_addr;
543cc10b 2020
c141ebda 2021 /* No need for _rcu here. All reconfiguration is
543cc10b
LE		 2022 * strictly serialized on genl_lock(). We are protected against
2023 * concurrent reconfiguration/addition/deletion */
80883197 2024 list_for_each_entry(oconn, &drbd_tconns, all_tconn) {
44ed167d 2025 struct net_conf *nc;
80883197 2026 if (oconn == tconn)
b411b363 2027 continue;
44ed167d
PR		 2028
2029 rcu_read_lock();
2030 nc = rcu_dereference(oconn->net_conf);
2031 if (nc) {
2032 taken_addr = (struct sockaddr *)&nc->my_addr;
2033 if (new_conf->my_addr_len == nc->my_addr_len &&
b411b363
PR		 2034 !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len))
2035 retcode = ERR_LOCAL_ADDR;
2036
44ed167d
PR		 2037 taken_addr = (struct sockaddr *)&nc->peer_addr;
2038 if (new_conf->peer_addr_len == nc->peer_addr_len &&
b411b363
PR		 2039 !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len))
2040 retcode = ERR_PEER_ADDR;
b411b363 2041 }
44ed167d
PR		 2042 rcu_read_unlock();
2043 if (retcode != NO_ERROR)
2044 goto fail;
b411b363
PR		 2045 }
2046
0fd0ea06
PR		 2047 retcode = alloc_crypto(&crypto, new_conf);
2048 if (retcode != NO_ERROR)
2049 goto fail;
b411b363 2050
b411b363
PR		 2051 ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;
2052
80883197 2053 conn_flush_workqueue(tconn);
91fd4dad 2054
a0095508 2055 mutex_lock(&tconn->conf_update);
91fd4dad
PR		 2056 old_conf = tconn->net_conf;
2057 if (old_conf) {
b411b363 2058 retcode = ERR_NET_CONFIGURED;
a0095508 2059 mutex_unlock(&tconn->conf_update);
b411b363
PR		 2060 goto fail;
2061 }
44ed167d 2062 rcu_assign_pointer(tconn->net_conf, new_conf);
b411b363 2063
91fd4dad 2064 conn_free_crypto(tconn);
0fd0ea06
PR		 2065 tconn->int_dig_in = crypto.int_dig_in;
2066 tconn->int_dig_vv = crypto.int_dig_vv;
2067 tconn->cram_hmac_tfm = crypto.cram_hmac_tfm;
8d412fc6 2068 tconn->integrity_tfm = crypto.integrity_tfm;
0fd0ea06
PR		 2069 tconn->csums_tfm = crypto.csums_tfm;
2070 tconn->verify_tfm = crypto.verify_tfm;
b411b363 2071
a0095508 2072 mutex_unlock(&tconn->conf_update);
91fd4dad 2073
695d08fa 2074 rcu_read_lock();
80883197
PR		 2075 idr_for_each_entry(&tconn->volumes, mdev, i) {
2076 mdev->send_cnt = 0;
2077 mdev->recv_cnt = 0;
80883197 2078 }
695d08fa 2079 rcu_read_unlock();
5ee743e9
LE		 2080
2081 retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE);
2082
80883197 2083 conn_reconfig_done(tconn);
3b98c0c2 2084 drbd_adm_finish(info, retcode);
b411b363
PR		 2085 return 0;
2086
2087fail:
0fd0ea06 2088 free_crypto(&crypto);
b411b363
PR		 2089 kfree(new_conf);
2090
80883197 2091 conn_reconfig_done(tconn);
3b98c0c2
LE		 2092out:
2093 drbd_adm_finish(info, retcode);
b411b363
PR		 2094 return 0;
2095}
2096
85f75dd7
LE		 2097static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force)
2098{
2099 enum drbd_state_rv rv;
85f75dd7 2100
f3dfa40a
LE		 2101 rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING),
2102 force ? CS_HARD : 0);
85f75dd7
LE		 2103
2104 switch (rv) {
2105 case SS_NOTHING_TO_DO:
f3dfa40a 2106 break;
85f75dd7
LE		 2107 case SS_ALREADY_STANDALONE:
2108 return SS_SUCCESS;
2109 case SS_PRIMARY_NOP:
2110 /* Our state checking code wants to see the peer outdated. */
2111 rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING,
f3dfa40a 2112 pdsk, D_OUTDATED), CS_VERBOSE);
85f75dd7
LE		 2113 break;
2114 case SS_CW_FAILED_BY_PEER:
2115 /* The peer probably wants to see us outdated. */
2116 rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING,
2117 disk, D_OUTDATED), 0);
2118 if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) {
f3dfa40a
LE		 2119 rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING),
2120 CS_HARD);
85f75dd7
LE		 2121 }
2122 break;
2123 default:;
2124 /* no special handling necessary */
2125 }
2126
f3dfa40a
LE		 2127 if (rv >= SS_SUCCESS) {
2128 enum drbd_state_rv rv2;
2129 /* No one else can reconfigure the network while I am here.
2130 * The state handling only uses drbd_thread_stop_nowait(),
2131 * we want to really wait here until the receiver is no more.
2132 */
2133 drbd_thread_stop(&adm_ctx.tconn->receiver);
2134
2135 /* Race breaker. This additional state change request may be
2136 * necessary, if this was a forced disconnect during a receiver
2137 * restart. We may have "killed" the receiver thread just
2138 * after drbdd_init() returned. Typically, we should be
2139 * C_STANDALONE already, now, and this becomes a no-op.
2140 */
2141 rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE),
2142 CS_VERBOSE | CS_HARD);
2143 if (rv2 < SS_SUCCESS)
2144 conn_err(tconn,
2145 "unexpected rv2=%d in conn_try_disconnect()\n",
2146 rv2);
2147 }
85f75dd7
LE		 2148 return rv;
2149}
2150
3b98c0c2 2151int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info)
b411b363 2152{
3b98c0c2
LE		 2153 struct disconnect_parms parms;
2154 struct drbd_tconn *tconn;
85f75dd7 2155 enum drbd_state_rv rv;
3b98c0c2
LE		 2156 enum drbd_ret_code retcode;
2157 int err;
2561b9c1 2158
3b98c0c2
LE		 2159 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
2160 if (!adm_ctx.reply_skb)
2161 return retcode;
2162 if (retcode != NO_ERROR)
2561b9c1 2163 goto fail;
3b98c0c2
LE		 2164
2165 tconn = adm_ctx.tconn;
2166 memset(&parms, 0, sizeof(parms));
2167 if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) {
f399002e 2168 err = disconnect_parms_from_attrs(&parms, info);
3b98c0c2
LE		 2169 if (err) {
2170 retcode = ERR_MANDATORY_TAG;
2171 drbd_msg_put_info(from_attrs_err_to_txt(err));
2172 goto fail;
2173 }
2561b9c1
PR		 2174 }
2175
85f75dd7
LE		 2176 rv = conn_try_disconnect(tconn, parms.force_disconnect);
2177 if (rv < SS_SUCCESS)
f3dfa40a
LE		 2178 retcode = rv; /* FIXME: Type mismatch. */
2179 else
2180 retcode = NO_ERROR;
b411b363 2181 fail:
3b98c0c2 2182 drbd_adm_finish(info, retcode);
b411b363
PR		 2183 return 0;
2184}
2185
2186void resync_after_online_grow(struct drbd_conf *mdev)
2187{
2188 int iass; /* I am sync source */
2189
2190 dev_info(DEV, "Resync of new storage after online grow\n");
2191 if (mdev->state.role != mdev->state.peer)
2192 iass = (mdev->state.role == R_PRIMARY);
2193 else
25703f83 2194 iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags);
b411b363
PR		 2195
2196 if (iass)
2197 drbd_start_resync(mdev, C_SYNC_SOURCE);
2198 else
2199 _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE);
2200}
2201
3b98c0c2 2202int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info)
b411b363 2203{
daeda1cc 2204 struct disk_conf *old_disk_conf, *new_disk_conf = NULL;
3b98c0c2
LE		 2205 struct resize_parms rs;
2206 struct drbd_conf *mdev;
2207 enum drbd_ret_code retcode;
b411b363 2208 enum determine_dev_size dd;
6495d2c6 2209 enum dds_flags ddsf;
daeda1cc 2210 sector_t u_size;
3b98c0c2 2211 int err;
b411b363 2212
3b98c0c2
LE		 2213 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2214 if (!adm_ctx.reply_skb)
2215 return retcode;
2216 if (retcode != NO_ERROR)
b411b363 2217 goto fail;
3b98c0c2
LE		 2218
2219 memset(&rs, 0, sizeof(struct resize_parms));
2220 if (info->attrs[DRBD_NLA_RESIZE_PARMS]) {
f399002e 2221 err = resize_parms_from_attrs(&rs, info);
3b98c0c2
LE		 2222 if (err) {
2223 retcode = ERR_MANDATORY_TAG;
2224 drbd_msg_put_info(from_attrs_err_to_txt(err));
2225 goto fail;
2226 }
b411b363
PR		 2227 }
2228
3b98c0c2 2229 mdev = adm_ctx.mdev;
b411b363
PR		 2230 if (mdev->state.conn > C_CONNECTED) {
2231 retcode = ERR_RESIZE_RESYNC;
2232 goto fail;
2233 }
2234
2235 if (mdev->state.role == R_SECONDARY &&
2236 mdev->state.peer == R_SECONDARY) {
2237 retcode = ERR_NO_PRIMARY;
2238 goto fail;
2239 }
2240
2241 if (!get_ldev(mdev)) {
2242 retcode = ERR_NO_DISK;
2243 goto fail;
2244 }
2245
31890f4a 2246 if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) {
6495d2c6
PR		 2247 retcode = ERR_NEED_APV_93;
2248 goto fail;
2249 }
2250
daeda1cc
PR		 2251 rcu_read_lock();
2252 u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size;
2253 rcu_read_unlock();
2254 if (u_size != (sector_t)rs.resize_size) {
2255 new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL);
2256 if (!new_disk_conf) {
2257 retcode = ERR_NOMEM;
2258 goto fail;
2259 }
2260 }
2261
087c2492 2262 if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev))
b411b363 2263 mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev);
b411b363 2264
daeda1cc
PR		 2265 if (new_disk_conf) {
2266 mutex_lock(&mdev->tconn->conf_update);
2267 old_disk_conf = mdev->ldev->disk_conf;
2268 *new_disk_conf = *old_disk_conf;
2269 new_disk_conf->disk_size = (sector_t)rs.resize_size;
2270 rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
2271 mutex_unlock(&mdev->tconn->conf_update);
2272 synchronize_rcu();
2273 kfree(old_disk_conf);
2274 }
2275
6495d2c6 2276 ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0);
24c4830c 2277 dd = drbd_determine_dev_size(mdev, ddsf);
b411b363
PR		 2278 drbd_md_sync(mdev);
2279 put_ldev(mdev);
2280 if (dd == dev_size_error) {
2281 retcode = ERR_NOMEM_BITMAP;
2282 goto fail;
2283 }
2284
087c2492 2285 if (mdev->state.conn == C_CONNECTED) {
b411b363
PR		 2286 if (dd == grew)
2287 set_bit(RESIZE_PENDING, &mdev->flags);
2288
2289 drbd_send_uuids(mdev);
6495d2c6 2290 drbd_send_sizes(mdev, 1, ddsf);
b411b363
PR		 2291 }
2292
2293 fail:
3b98c0c2 2294 drbd_adm_finish(info, retcode);
b411b363
PR		 2295 return 0;
2296}
2297
b966b5dd
AG		 2298void drbd_set_res_opts_defaults(struct res_opts *r)
2299{
2300 return set_res_opts_defaults(r);
2301}
2302
f399002e 2303int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
b411b363 2304{
3b98c0c2 2305 enum drbd_ret_code retcode;
b411b363 2306 cpumask_var_t new_cpu_mask;
f399002e 2307 struct drbd_tconn *tconn;
b57a1e27 2308 struct res_opts res_opts;
f399002e 2309 int err;
b411b363 2310
f399002e 2311 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
3b98c0c2
LE		 2312 if (!adm_ctx.reply_skb)
2313 return retcode;
2314 if (retcode != NO_ERROR)
2315 goto fail;
f399002e 2316 tconn = adm_ctx.tconn;
3b98c0c2 2317
b411b363
PR		 2318 if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) {
2319 retcode = ERR_NOMEM;
3b98c0c2 2320 drbd_msg_put_info("unable to allocate cpumask");
b411b363
PR		 2321 goto fail;
2322 }
2323
b57a1e27 2324 res_opts = tconn->res_opts;
5979e361 2325 if (should_set_defaults(info))
b966b5dd 2326 set_res_opts_defaults(&res_opts);
b411b363 2327
b57a1e27 2328 err = res_opts_from_attrs(&res_opts, info);
3b98c0c2 2329 if (err) {
b411b363 2330 retcode = ERR_MANDATORY_TAG;
3b98c0c2 2331 drbd_msg_put_info(from_attrs_err_to_txt(err));
b411b363
PR		 2332 goto fail;
2333 }
2334
b411b363 2335 /* silently ignore cpu mask on UP kernel */
b57a1e27
LE		 2336 if (nr_cpu_ids > 1 && res_opts.cpu_mask[0] != 0) {
2337 err = __bitmap_parse(res_opts.cpu_mask, 32, 0,
b411b363
PR		 2338 cpumask_bits(new_cpu_mask), nr_cpu_ids);
2339 if (err) {
f399002e 2340 conn_warn(tconn, "__bitmap_parse() failed with %d\n", err);
b411b363
PR		 2341 retcode = ERR_CPU_MASK_PARSE;
2342 goto fail;
2343 }
2344 }
2345
b411b363 2346
b57a1e27 2347 tconn->res_opts = res_opts;
b411b363 2348
f399002e
LE		 2349 if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) {
2350 cpumask_copy(tconn->cpu_mask, new_cpu_mask);
2351 drbd_calc_cpu_mask(tconn);
2352 tconn->receiver.reset_cpu_mask = 1;
2353 tconn->asender.reset_cpu_mask = 1;
2354 tconn->worker.reset_cpu_mask = 1;
b411b363
PR		 2355 }
2356
b411b363
PR		 2357fail:
2358 free_cpumask_var(new_cpu_mask);
3b98c0c2
LE		 2359
2360 drbd_adm_finish(info, retcode);
b411b363
PR		 2361 return 0;
2362}
2363
3b98c0c2 2364int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info)
b411b363 2365{
3b98c0c2
LE		 2366 struct drbd_conf *mdev;
2367 int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2368
2369 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2370 if (!adm_ctx.reply_skb)
2371 return retcode;
2372 if (retcode != NO_ERROR)
2373 goto out;
2374
2375 mdev = adm_ctx.mdev;
b411b363 2376
194bfb32
LE		 2377 /* If there is still bitmap IO pending, probably because of a previous
2378 * resync just being finished, wait for it before requesting a new resync. */
2379 wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
2380
b411b363
PR		 2381 retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED);
2382
2383 if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION)
2384 retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
2385
2386 while (retcode == SS_NEED_CONNECTION) {
87eeee41 2387 spin_lock_irq(&mdev->tconn->req_lock);
b411b363
PR		 2388 if (mdev->state.conn < C_CONNECTED)
2389 retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL);
87eeee41 2390 spin_unlock_irq(&mdev->tconn->req_lock);
b411b363
PR		 2391
2392 if (retcode != SS_NEED_CONNECTION)
2393 break;
2394
2395 retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
2396 }
2397
3b98c0c2
LE		 2398out:
2399 drbd_adm_finish(info, retcode);
b411b363
PR		 2400 return 0;
2401}
2402
0778286a
PR		 2403static int drbd_bmio_set_susp_al(struct drbd_conf *mdev)
2404{
2405 int rv;
2406
2407 rv = drbd_bmio_set_n_write(mdev);
2408 drbd_suspend_al(mdev);
2409 return rv;
2410}
2411
3b98c0c2
LE		 2412static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info,
2413 union drbd_state mask, union drbd_state val)
b411b363 2414{
3b98c0c2 2415 enum drbd_ret_code retcode;
194bfb32 2416
3b98c0c2
LE		 2417 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2418 if (!adm_ctx.reply_skb)
2419 return retcode;
2420 if (retcode != NO_ERROR)
2421 goto out;
b411b363 2422
3b98c0c2
LE		 2423 retcode = drbd_request_state(adm_ctx.mdev, mask, val);
2424out:
2425 drbd_adm_finish(info, retcode);
b411b363
PR		 2426 return 0;
2427}
2428
3b98c0c2 2429int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info)
b411b363 2430{
3b98c0c2
LE		 2431 return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S));
2432}
b411b363 2433
3b98c0c2
LE		 2434int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info)
2435{
2436 enum drbd_ret_code retcode;
2437
2438 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2439 if (!adm_ctx.reply_skb)
2440 return retcode;
2441 if (retcode != NO_ERROR)
2442 goto out;
b411b363 2443
3b98c0c2
LE		 2444 if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO)
2445 retcode = ERR_PAUSE_IS_SET;
2446out:
2447 drbd_adm_finish(info, retcode);
b411b363
PR		 2448 return 0;
2449}
2450
3b98c0c2 2451int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info)
b411b363 2452{
da9fbc27 2453 union drbd_dev_state s;
3b98c0c2
LE		 2454 enum drbd_ret_code retcode;
2455
2456 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2457 if (!adm_ctx.reply_skb)
2458 return retcode;
2459 if (retcode != NO_ERROR)
2460 goto out;
b411b363 2461
3b98c0c2
LE		 2462 if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
2463 s = adm_ctx.mdev->state;
cd88d030
PR		 2464 if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) {
2465 retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP :
2466 s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR;
2467 } else {
2468 retcode = ERR_PAUSE_IS_CLEAR;
2469 }
2470 }
b411b363 2471
3b98c0c2
LE		 2472out:
2473 drbd_adm_finish(info, retcode);
b411b363
PR		 2474 return 0;
2475}
2476
3b98c0c2 2477int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info)
b411b363 2478{
3b98c0c2 2479 return drbd_adm_simple_request_state(skb, info, NS(susp, 1));
b411b363
PR		 2480}
2481
3b98c0c2 2482int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info)
b411b363 2483{
3b98c0c2
LE		 2484 struct drbd_conf *mdev;
2485 int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2486
2487 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2488 if (!adm_ctx.reply_skb)
2489 return retcode;
2490 if (retcode != NO_ERROR)
2491 goto out;
2492
2493 mdev = adm_ctx.mdev;
43a5182c
PR		 2494 if (test_bit(NEW_CUR_UUID, &mdev->flags)) {
2495 drbd_uuid_new_current(mdev);
2496 clear_bit(NEW_CUR_UUID, &mdev->flags);
43a5182c 2497 }
265be2d0 2498 drbd_suspend_io(mdev);
3b98c0c2
LE		 2499 retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0));
2500 if (retcode == SS_SUCCESS) {
265be2d0 2501 if (mdev->state.conn < C_CONNECTED)
2f5cdd0b 2502 tl_clear(mdev->tconn);
265be2d0 2503 if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED)
2f5cdd0b 2504 tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO);
265be2d0
PR		 2505 }
2506 drbd_resume_io(mdev);
2507
3b98c0c2
LE		 2508out:
2509 drbd_adm_finish(info, retcode);
b411b363
PR		 2510 return 0;
2511}
2512
3b98c0c2 2513int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info)
b411b363 2514{
3b98c0c2 2515 return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED));
b411b363
PR		 2516}
2517
543cc10b
LE		 2518int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *conn_name, unsigned vnr)
2519{
2520 struct nlattr *nla;
2521 nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT);
2522 if (!nla)
2523 goto nla_put_failure;
2524 if (vnr != VOLUME_UNSPECIFIED)
2525 NLA_PUT_U32(skb, T_ctx_volume, vnr);
2526 NLA_PUT_STRING(skb, T_ctx_conn_name, conn_name);
2527 nla_nest_end(skb, nla);
2528 return 0;
2529
2530nla_put_failure:
2531 if (nla)
2532 nla_nest_cancel(skb, nla);
2533 return -EMSGSIZE;
2534}
2535
3b98c0c2
LE		 2536int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
2537 const struct sib_info *sib)
b411b363 2538{
3b98c0c2 2539 struct state_info *si = NULL; /* for sizeof(si->member); */
44ed167d 2540 struct net_conf *nc;
3b98c0c2
LE		 2541 struct nlattr *nla;
2542 int got_ldev;
3b98c0c2
LE		 2543 int err = 0;
2544 int exclude_sensitive;
2545
2546 /* If sib != NULL, this is drbd_bcast_event, which anyone can listen
2547 * to. So we better exclude_sensitive information.
2548 *
2549 * If sib == NULL, this is drbd_adm_get_status, executed synchronously
2550 * in the context of the requesting user process. Exclude sensitive
2551 * information, unless current has superuser.
2552 *
2553 * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and
2554 * relies on the current implementation of netlink_dump(), which
2555 * executes the dump callback successively from netlink_recvmsg(),
2556 * always in the context of the receiving process */
2557 exclude_sensitive = sib || !capable(CAP_SYS_ADMIN);
2558
2559 got_ldev = get_ldev(mdev);
3b98c0c2
LE		 2560
2561 /* We need to add connection name and volume number information still.
2562 * Minor number is in drbd_genlmsghdr. */
543cc10b 2563 if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr))
3b98c0c2 2564 goto nla_put_failure;
3b98c0c2 2565
f399002e
LE		 2566 if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive))
2567 goto nla_put_failure;
2568
daeda1cc 2569 rcu_read_lock();
3b98c0c2 2570 if (got_ldev)
daeda1cc 2571 if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive))
3b98c0c2 2572 goto nla_put_failure;
44ed167d 2573
44ed167d
PR		 2574 nc = rcu_dereference(mdev->tconn->net_conf);
2575 if (nc)
2576 err = net_conf_to_skb(skb, nc, exclude_sensitive);
2577 rcu_read_unlock();
2578 if (err)
2579 goto nla_put_failure;
3b98c0c2 2580
3b98c0c2
LE		 2581 nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO);
2582 if (!nla)
2583 goto nla_put_failure;
2584 NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY);
2585 NLA_PUT_U32(skb, T_current_state, mdev->state.i);
2586 NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid);
2587 NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev));
2588
2589 if (got_ldev) {
2590 NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags);
2591 NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid);
2592 NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev));
2593 NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev));
2594 if (C_SYNC_SOURCE <= mdev->state.conn &&
2595 C_PAUSED_SYNC_T >= mdev->state.conn) {
2596 NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total);
2597 NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed);
2598 }
b411b363
PR		 2599 }
2600
3b98c0c2
LE		 2601 if (sib) {
2602 switch(sib->sib_reason) {
2603 case SIB_SYNC_PROGRESS:
2604 case SIB_GET_STATUS_REPLY:
2605 break;
2606 case SIB_STATE_CHANGE:
2607 NLA_PUT_U32(skb, T_prev_state, sib->os.i);
2608 NLA_PUT_U32(skb, T_new_state, sib->ns.i);
2609 break;
2610 case SIB_HELPER_POST:
2611 NLA_PUT_U32(skb,
2612 T_helper_exit_code, sib->helper_exit_code);
2613 /* fall through */
2614 case SIB_HELPER_PRE:
2615 NLA_PUT_STRING(skb, T_helper, sib->helper_name);
2616 break;
2617 }
b411b363 2618 }
3b98c0c2 2619 nla_nest_end(skb, nla);
b411b363 2620
3b98c0c2
LE		 2621 if (0)
2622nla_put_failure:
2623 err = -EMSGSIZE;
2624 if (got_ldev)
2625 put_ldev(mdev);
3b98c0c2 2626 return err;
b411b363
PR		 2627}
2628
3b98c0c2 2629int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info)
b411b363 2630{
3b98c0c2
LE		 2631 enum drbd_ret_code retcode;
2632 int err;
b411b363 2633
3b98c0c2
LE		 2634 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2635 if (!adm_ctx.reply_skb)
2636 return retcode;
2637 if (retcode != NO_ERROR)
2638 goto out;
b411b363 2639
3b98c0c2
LE		 2640 err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL);
2641 if (err) {
2642 nlmsg_free(adm_ctx.reply_skb);
2643 return err;
b411b363 2644 }
3b98c0c2
LE		 2645out:
2646 drbd_adm_finish(info, retcode);
2647 return 0;
b411b363
PR		 2648}
2649
71932efc 2650int get_one_status(struct sk_buff *skb, struct netlink_callback *cb)
b411b363 2651{
3b98c0c2
LE		 2652 struct drbd_conf *mdev;
2653 struct drbd_genlmsghdr *dh;
543cc10b
LE		 2654 struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0];
2655 struct drbd_tconn *tconn = NULL;
2656 struct drbd_tconn *tmp;
2657 unsigned volume = cb->args[1];
2658
2659 /* Open coded, deferred, iteration:
2660 * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) {
2661 * idr_for_each_entry(&tconn->volumes, mdev, i) {
2662 * ...
2663 * }
2664 * }
2665 * where tconn is cb->args[0];
2666 * and i is cb->args[1];
2667 *
71932efc
LE		 2668 * cb->args[2] indicates if we shall loop over all resources,
2669 * or just dump all volumes of a single resource.
2670 *
3b98c0c2
LE		 2671 * This may miss entries inserted after this dump started,
2672 * or entries deleted before they are reached.
543cc10b
LE		 2673 *
2674 * We need to make sure the mdev won't disappear while
2675 * we are looking at it, and revalidate our iterators
2676 * on each iteration.
2677 */
3b98c0c2 2678
9dc9fbb3 2679 /* synchronize with conn_create()/conn_destroy() */
c141ebda 2680 rcu_read_lock();
543cc10b 2681 /* revalidate iterator position */
ec0bddbc 2682 list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) {
543cc10b
LE		 2683 if (pos == NULL) {
2684 /* first iteration */
2685 pos = tmp;
2686 tconn = pos;
2687 break;
2688 }
2689 if (tmp == pos) {
2690 tconn = pos;
2691 break;
2692 }
2693 }
2694 if (tconn) {
71932efc 2695next_tconn:
543cc10b
LE		 2696 mdev = idr_get_next(&tconn->volumes, &volume);
2697 if (!mdev) {
2698 /* No more volumes to dump on this tconn.
2699 * Advance tconn iterator. */
ec0bddbc
PR		 2700 pos = list_entry_rcu(tconn->all_tconn.next,
2701 struct drbd_tconn, all_tconn);
71932efc 2702 /* Did we dump any volume on this tconn yet? */
543cc10b 2703 if (volume != 0) {
71932efc
LE		 2704 /* If we reached the end of the list,
2705 * or only a single resource dump was requested,
2706 * we are done. */
2707 if (&pos->all_tconn == &drbd_tconns || cb->args[2])
2708 goto out;
543cc10b 2709 volume = 0;
71932efc 2710 tconn = pos;
543cc10b
LE		 2711 goto next_tconn;
2712 }
2713 }
2714
3b98c0c2
LE		 2715 dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid,
2716 cb->nlh->nlmsg_seq, &drbd_genl_family,
2717 NLM_F_MULTI, DRBD_ADM_GET_STATUS);
2718 if (!dh)
543cc10b
LE		 2719 goto out;
2720
2721 if (!mdev) {
2722 /* this is a tconn without a single volume */
2723 dh->minor = -1U;
2724 dh->ret_code = NO_ERROR;
2725 if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED))
2726 genlmsg_cancel(skb, dh);
2727 else
2728 genlmsg_end(skb, dh);
2729 goto out;
2730 }
3b98c0c2 2731
543cc10b
LE		 2732 D_ASSERT(mdev->vnr == volume);
2733 D_ASSERT(mdev->tconn == tconn);
3b98c0c2 2734
543cc10b 2735 dh->minor = mdev_to_minor(mdev);
3b98c0c2
LE		 2736 dh->ret_code = NO_ERROR;
2737
2738 if (nla_put_status_info(skb, mdev, NULL)) {
2739 genlmsg_cancel(skb, dh);
543cc10b 2740 goto out;
3b98c0c2
LE		 2741 }
2742 genlmsg_end(skb, dh);
2743 }
b411b363 2744
543cc10b 2745out:
c141ebda 2746 rcu_read_unlock();
543cc10b
LE		 2747 /* where to start the next iteration */
2748 cb->args[0] = (long)pos;
2749 cb->args[1] = (pos == tconn) ? volume + 1 : 0;
b411b363 2750
543cc10b
LE		 2751 /* No more tconns/volumes/minors found results in an empty skb.
2752 * Which will terminate the dump. */
3b98c0c2 2753 return skb->len;
b411b363
PR		 2754}
2755
71932efc
LE		 2756/*
2757 * Request status of all resources, or of all volumes within a single resource.
2758 *
2759 * This is a dump, as the answer may not fit in a single reply skb otherwise.
2760 * Which means we cannot use the family->attrbuf or other such members, because
2761 * dump is NOT protected by the genl_lock(). During dump, we only have access
2762 * to the incoming skb, and need to opencode "parsing" of the nlattr payload.
2763 *
2764 * Once things are setup properly, we call into get_one_status().
2765 */
2766int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb)
2767{
2768 const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ;
2769 struct nlattr *nla;
2770 const char *conn_name;
2771 struct drbd_tconn *tconn;
2772
2773 /* Is this a followup call? */
2774 if (cb->args[0]) {
2775 /* ... of a single resource dump,
2776 * and the resource iterator has been advanced already? */
2777 if (cb->args[2] && cb->args[2] != cb->args[0])
2778 return 0; /* DONE. */
2779 goto dump;
2780 }
2781
2782 /* First call (from netlink_dump_start). We need to figure out
2783 * which resource(s) the user wants us to dump. */
2784 nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen),
2785 nlmsg_attrlen(cb->nlh, hdrlen),
2786 DRBD_NLA_CFG_CONTEXT);
2787
2788 /* No explicit context given. Dump all. */
2789 if (!nla)
2790 goto dump;
2791 nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name));
2792 /* context given, but no name present? */
2793 if (!nla)
2794 return -EINVAL;
2795 conn_name = nla_data(nla);
0ace9dfa
PR		 2796 tconn = conn_get_by_name(conn_name);
2797
71932efc
LE		 2798 if (!tconn)
2799 return -ENODEV;
2800
0ace9dfa
PR		 2801 kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */
2802
71932efc
LE		 2803 /* prime iterators, and set "filter" mode mark:
2804 * only dump this tconn. */
2805 cb->args[0] = (long)tconn;
2806 /* cb->args[1] = 0; passed in this way. */
2807 cb->args[2] = (long)tconn;
2808
2809dump:
2810 return get_one_status(skb, cb);
2811}
2812
3b98c0c2 2813int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info)
b411b363 2814{
3b98c0c2
LE		 2815 enum drbd_ret_code retcode;
2816 struct timeout_parms tp;
2817 int err;
b411b363 2818
3b98c0c2
LE		 2819 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2820 if (!adm_ctx.reply_skb)
2821 return retcode;
2822 if (retcode != NO_ERROR)
2823 goto out;
b411b363 2824
3b98c0c2
LE		 2825 tp.timeout_type =
2826 adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED :
2827 test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED :
2828 UT_DEFAULT;
b411b363 2829
3b98c0c2
LE		 2830 err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp);
2831 if (err) {
2832 nlmsg_free(adm_ctx.reply_skb);
2833 return err;
2834 }
2835out:
2836 drbd_adm_finish(info, retcode);
2837 return 0;
b411b363
PR		 2838}
2839
3b98c0c2 2840int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info)
b411b363 2841{
3b98c0c2
LE		 2842 struct drbd_conf *mdev;
2843 enum drbd_ret_code retcode;
b411b363 2844
3b98c0c2
LE		 2845 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2846 if (!adm_ctx.reply_skb)
2847 return retcode;
2848 if (retcode != NO_ERROR)
2849 goto out;
873b0d5f 2850
3b98c0c2
LE		 2851 mdev = adm_ctx.mdev;
2852 if (info->attrs[DRBD_NLA_START_OV_PARMS]) {
2853 /* resume from last known position, if possible */
2854 struct start_ov_parms parms =
2855 { .ov_start_sector = mdev->ov_start_sector };
f399002e 2856 int err = start_ov_parms_from_attrs(&parms, info);
3b98c0c2
LE		 2857 if (err) {
2858 retcode = ERR_MANDATORY_TAG;
2859 drbd_msg_put_info(from_attrs_err_to_txt(err));
2860 goto out;
2861 }
2862 /* w_make_ov_request expects position to be aligned */
2863 mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT;
2864 }
873b0d5f
LE		 2865 /* If there is still bitmap IO pending, e.g. previous resync or verify
2866 * just being finished, wait for it before requesting a new resync. */
2867 wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
3b98c0c2
LE		 2868 retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S));
2869out:
2870 drbd_adm_finish(info, retcode);
b411b363
PR		 2871 return 0;
2872}
2873
2874
3b98c0c2 2875int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info)
b411b363 2876{
3b98c0c2
LE		 2877 struct drbd_conf *mdev;
2878 enum drbd_ret_code retcode;
b411b363
PR		 2879 int skip_initial_sync = 0;
2880 int err;
3b98c0c2 2881 struct new_c_uuid_parms args;
b411b363 2882
3b98c0c2
LE		 2883 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
2884 if (!adm_ctx.reply_skb)
2885 return retcode;
2886 if (retcode != NO_ERROR)
2887 goto out_nolock;
b411b363 2888
3b98c0c2
LE		 2889 mdev = adm_ctx.mdev;
2890 memset(&args, 0, sizeof(args));
2891 if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) {
f399002e 2892 err = new_c_uuid_parms_from_attrs(&args, info);
3b98c0c2
LE		 2893 if (err) {
2894 retcode = ERR_MANDATORY_TAG;
2895 drbd_msg_put_info(from_attrs_err_to_txt(err));
2896 goto out_nolock;
2897 }
b411b363
PR		 2898 }
2899
8410da8f 2900 mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */
b411b363
PR		 2901
2902 if (!get_ldev(mdev)) {
2903 retcode = ERR_NO_DISK;
2904 goto out;
2905 }
2906
2907 /* this is "skip initial sync", assume to be clean */
31890f4a 2908 if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 &&
b411b363
PR		 2909 mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) {
2910 dev_info(DEV, "Preparing to skip initial sync\n");
2911 skip_initial_sync = 1;
2912 } else if (mdev->state.conn != C_STANDALONE) {
2913 retcode = ERR_CONNECTED;
2914 goto out_dec;
2915 }
2916
2917 drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */
2918 drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */
2919
2920 if (args.clear_bm) {
20ceb2b2
LE		 2921 err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write,
2922 "clear_n_write from new_c_uuid", BM_LOCKED_MASK);
b411b363
PR		 2923 if (err) {
2924 dev_err(DEV, "Writing bitmap failed with %d\n",err);
2925 retcode = ERR_IO_MD_DISK;
2926 }
2927 if (skip_initial_sync) {
2928 drbd_send_uuids_skip_initial_sync(mdev);
2929 _drbd_uuid_set(mdev, UI_BITMAP, 0);
62b0da3a 2930 drbd_print_uuids(mdev, "cleared bitmap UUID");
87eeee41 2931 spin_lock_irq(&mdev->tconn->req_lock);
b411b363
PR		 2932 _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
2933 CS_VERBOSE, NULL);
87eeee41 2934 spin_unlock_irq(&mdev->tconn->req_lock);
b411b363
PR		 2935 }
2936 }
2937
2938 drbd_md_sync(mdev);
2939out_dec:
2940 put_ldev(mdev);
2941out:
8410da8f 2942 mutex_unlock(mdev->state_mutex);
3b98c0c2
LE		 2943out_nolock:
2944 drbd_adm_finish(info, retcode);
774b3055
PR		 2945 return 0;
2946}
2947
3b98c0c2
LE		 2948static enum drbd_ret_code
2949drbd_check_conn_name(const char *name)
774b3055 2950{
3b98c0c2
LE		 2951 if (!name || !name[0]) {
2952 drbd_msg_put_info("connection name missing");
2953 return ERR_MANDATORY_TAG;
774b3055 2954 }
3b98c0c2
LE		 2955 /* if we want to use these in sysfs/configfs/debugfs some day,
2956 * we must not allow slashes */
2957 if (strchr(name, '/')) {
2958 drbd_msg_put_info("invalid connection name");
2959 return ERR_INVALID_REQUEST;
774b3055 2960 }
3b98c0c2 2961 return NO_ERROR;
774b3055
PR		 2962}
2963
3b98c0c2 2964int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info)
b411b363 2965{
3b98c0c2 2966 enum drbd_ret_code retcode;
9f5180e5 2967
3b98c0c2
LE		 2968 retcode = drbd_adm_prepare(skb, info, 0);
2969 if (!adm_ctx.reply_skb)
2970 return retcode;
2971 if (retcode != NO_ERROR)
2972 goto out;
b411b363 2973
3b98c0c2
LE		 2974 retcode = drbd_check_conn_name(adm_ctx.conn_name);
2975 if (retcode != NO_ERROR)
2976 goto out;
b411b363 2977
3b98c0c2 2978 if (adm_ctx.tconn) {
38f19616
LE		 2979 if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) {
2980 retcode = ERR_INVALID_REQUEST;
2981 drbd_msg_put_info("connection exists");
2982 }
2983 /* else: still NO_ERROR */
3b98c0c2 2984 goto out;
b411b363
PR		 2985 }
2986
9dc9fbb3 2987 if (!conn_create(adm_ctx.conn_name))
b411b363 2988 retcode = ERR_NOMEM;
3b98c0c2
LE		 2989out:
2990 drbd_adm_finish(info, retcode);
2991 return 0;
b411b363
PR		 2992}
2993
3b98c0c2 2994int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info)
b411b363 2995{
3b98c0c2
LE		 2996 struct drbd_genlmsghdr *dh = info->userhdr;
2997 enum drbd_ret_code retcode;
b411b363 2998
3b98c0c2
LE		 2999 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
3000 if (!adm_ctx.reply_skb)
3001 return retcode;
3002 if (retcode != NO_ERROR)
3003 goto out;
b411b363 3004
3b98c0c2
LE		 3005 /* FIXME drop minor_count parameter, limit to MINORMASK */
3006 if (dh->minor >= minor_count) {
3007 drbd_msg_put_info("requested minor out of range");
3008 retcode = ERR_INVALID_REQUEST;
3009 goto out;
b411b363 3010 }
0c8e36d9 3011 if (adm_ctx.volume > DRBD_VOLUME_MAX) {
3b98c0c2
LE		 3012 drbd_msg_put_info("requested volume id out of range");
3013 retcode = ERR_INVALID_REQUEST;
3014 goto out;
b411b363 3015 }
b411b363 3016
38f19616
LE		 3017 /* drbd_adm_prepare made sure already
3018 * that mdev->tconn and mdev->vnr match the request. */
3019 if (adm_ctx.mdev) {
3020 if (info->nlhdr->nlmsg_flags & NLM_F_EXCL)
3021 retcode = ERR_MINOR_EXISTS;
3022 /* else: still NO_ERROR */
3023 goto out;
3024 }
3025
3b98c0c2
LE		 3026 retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume);
3027out:
3028 drbd_adm_finish(info, retcode);
3029 return 0;
b411b363
PR		 3030}
3031
85f75dd7
LE		 3032static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev)
3033{
3034 if (mdev->state.disk == D_DISKLESS &&
3035 /* no need to be mdev->state.conn == C_STANDALONE &&
3036 * we may want to delete a minor from a live replication group.
3037 */
3038 mdev->state.role == R_SECONDARY) {
81fa2e67
PR		 3039 idr_remove(&mdev->tconn->volumes, mdev->vnr);
3040 idr_remove(&minors, mdev_to_minor(mdev));
3041 del_gendisk(mdev->vdisk);
3042 synchronize_rcu();
3043 kref_put(&mdev->kref, &drbd_minor_destroy);
85f75dd7
LE		 3044 return NO_ERROR;
3045 } else
3046 return ERR_MINOR_CONFIGURED;
3047}
3048
3b98c0c2 3049int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info)
b411b363 3050{
3b98c0c2 3051 enum drbd_ret_code retcode;
b411b363 3052
3b98c0c2
LE		 3053 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
3054 if (!adm_ctx.reply_skb)
3055 return retcode;
3056 if (retcode != NO_ERROR)
3057 goto out;
b411b363 3058
85f75dd7 3059 retcode = adm_delete_minor(adm_ctx.mdev);
85f75dd7
LE		 3060out:
3061 drbd_adm_finish(info, retcode);
3062 return 0;
3063}
3064
3065int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)
3066{
f3dfa40a 3067 int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */
85f75dd7
LE		 3068 struct drbd_conf *mdev;
3069 unsigned i;
3070
3071 retcode = drbd_adm_prepare(skb, info, 0);
3072 if (!adm_ctx.reply_skb)
3073 return retcode;
3074 if (retcode != NO_ERROR)
3075 goto out;
3076
3077 if (!adm_ctx.tconn) {
3078 retcode = ERR_CONN_NOT_KNOWN;
3079 goto out;
3080 }
3081
85f75dd7
LE		 3082 /* demote */
3083 idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
3084 retcode = drbd_set_role(mdev, R_SECONDARY, 0);
3085 if (retcode < SS_SUCCESS) {
3086 drbd_msg_put_info("failed to demote");
c141ebda 3087 goto out;
85f75dd7
LE		 3088 }
3089 }
3090
f3dfa40a
LE		 3091 retcode = conn_try_disconnect(adm_ctx.tconn, 0);
3092 if (retcode < SS_SUCCESS) {
85f75dd7 3093 drbd_msg_put_info("failed to disconnect");
f3dfa40a 3094 goto out;
85f75dd7
LE		 3095 }
3096
3097 /* detach */
3098 idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
f3dfa40a
LE		 3099 retcode = adm_detach(mdev);
3100 if (retcode < SS_SUCCESS) {
85f75dd7 3101 drbd_msg_put_info("failed to detach");
c141ebda 3102 goto out;
85f75dd7
LE		 3103 }
3104 }
3105
f3dfa40a
LE		 3106 /* If we reach this, all volumes (of this tconn) are Secondary,
3107 * Disconnected, Diskless, aka Unconfigured. Make sure all threads have
c141ebda 3108 * actually stopped, state handling only does drbd_thread_stop_nowait(). */
f3dfa40a
LE		 3109 drbd_thread_stop(&adm_ctx.tconn->worker);
3110
3111 /* Now, nothing can fail anymore */
3112
85f75dd7
LE		 3113 /* delete volumes */
3114 idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
3115 retcode = adm_delete_minor(mdev);
3116 if (retcode != NO_ERROR) {
3117 /* "can not happen" */
3118 drbd_msg_put_info("failed to delete volume");
ef356262 3119 goto out;
85f75dd7
LE		 3120 }
3121 }
3122
85f75dd7
LE		 3123 /* delete connection */
3124 if (conn_lowest_minor(adm_ctx.tconn) < 0) {
ec0bddbc
PR		 3125 list_del_rcu(&adm_ctx.tconn->all_tconn);
3126 synchronize_rcu();
9dc9fbb3
PR		 3127 kref_put(&adm_ctx.tconn->kref, &conn_destroy);
3128
85f75dd7
LE		 3129 retcode = NO_ERROR;
3130 } else {
3131 /* "can not happen" */
3132 retcode = ERR_CONN_IN_USE;
3133 drbd_msg_put_info("failed to delete connection");
85f75dd7 3134 }
ef356262 3135 goto out;
3b98c0c2
LE		 3136out:
3137 drbd_adm_finish(info, retcode);
3138 return 0;
b411b363
PR		 3139}
3140
3b98c0c2 3141int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info)
b411b363 3142{
3b98c0c2 3143 enum drbd_ret_code retcode;
b411b363 3144
3b98c0c2
LE		 3145 retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN);
3146 if (!adm_ctx.reply_skb)
3147 return retcode;
3148 if (retcode != NO_ERROR)
3149 goto out;
3150
3151 if (conn_lowest_minor(adm_ctx.tconn) < 0) {
ec0bddbc
PR		 3152 list_del_rcu(&adm_ctx.tconn->all_tconn);
3153 synchronize_rcu();
9dc9fbb3
PR		 3154 kref_put(&adm_ctx.tconn->kref, &conn_destroy);
3155
3b98c0c2
LE		 3156 retcode = NO_ERROR;
3157 } else {
3158 retcode = ERR_CONN_IN_USE;
b411b363
PR		 3159 }
3160
992d6e91
LE		 3161 if (retcode == NO_ERROR)
3162 drbd_thread_stop(&adm_ctx.tconn->worker);
3b98c0c2
LE		 3163out:
3164 drbd_adm_finish(info, retcode);
b411b363
PR		 3165 return 0;
3166}
3167
3b98c0c2 3168void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib)
b411b363 3169{
3b98c0c2
LE		 3170 static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */
3171 struct sk_buff *msg;
3172 struct drbd_genlmsghdr *d_out;
3173 unsigned seq;
3174 int err = -ENOMEM;
3175
3176 seq = atomic_inc_return(&drbd_genl_seq);
3177 msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO);
3178 if (!msg)
3179 goto failed;
3180
3181 err = -EMSGSIZE;
3182 d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT);
3183 if (!d_out) /* cannot happen, but anyways. */
3184 goto nla_put_failure;
3185 d_out->minor = mdev_to_minor(mdev);
6f9b5f84 3186 d_out->ret_code = NO_ERROR;
3b98c0c2
LE		 3187
3188 if (nla_put_status_info(msg, mdev, sib))
3189 goto nla_put_failure;
3190 genlmsg_end(msg, d_out);
3191 err = drbd_genl_multicast_events(msg, 0);
3192 /* msg has been consumed or freed in netlink_broadcast() */
3193 if (err && err != -ESRCH)
3194 goto failed;
b411b363 3195
3b98c0c2 3196 return;
b411b363 3197
3b98c0c2
LE		 3198nla_put_failure:
3199 nlmsg_free(msg);
3200failed:
3201 dev_err(DEV, "Error %d while broadcasting event. "
3202 "Event seq:%u sib_reason:%u\n",
3203 err, seq, sib->sib_reason);
b411b363 3204}
Linux kernel - Deliverables
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