]>
Commit | Line | Data |
---|---|---|
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 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
50 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info); | |
51 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 52 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
53 | |
54 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
56 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); | |
57 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
58 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); | |
59 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
60 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
61 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
62 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
63 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
64 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
65 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
66 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
67 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
68 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
69 | int drbd_adm_syncer(struct sk_buff *skb, struct genl_info *info); | |
70 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); | |
71 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
72 | /* .dumpit */ | |
73 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
74 | ||
75 | #include <linux/drbd_genl_api.h> | |
76 | #include <linux/genl_magic_func.h> | |
77 | ||
78 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
79 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
80 | ||
3b98c0c2 LE |
81 | /* Configuration is strictly serialized, because generic netlink message |
82 | * processing is strictly serialized by the genl_lock(). | |
83 | * Which means we can use one static global drbd_config_context struct. | |
84 | */ | |
85 | static struct drbd_config_context { | |
86 | /* assigned from drbd_genlmsghdr */ | |
87 | unsigned int minor; | |
88 | /* assigned from request attributes, if present */ | |
89 | unsigned int volume; | |
90 | #define VOLUME_UNSPECIFIED (-1U) | |
91 | /* pointer into the request skb, | |
92 | * limited lifetime! */ | |
93 | char *conn_name; | |
94 | ||
95 | /* reply buffer */ | |
96 | struct sk_buff *reply_skb; | |
97 | /* pointer into reply buffer */ | |
98 | struct drbd_genlmsghdr *reply_dh; | |
99 | /* resolved from attributes, if possible */ | |
100 | struct drbd_conf *mdev; | |
101 | struct drbd_tconn *tconn; | |
102 | } adm_ctx; | |
103 | ||
104 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
105 | { | |
106 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
107 | if (genlmsg_reply(skb, info)) | |
108 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 109 | } |
3b98c0c2 LE |
110 | |
111 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
112 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 113 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
114 | { |
115 | struct sk_buff *skb = adm_ctx.reply_skb; | |
116 | struct nlattr *nla; | |
117 | int err = -EMSGSIZE; | |
118 | ||
119 | if (!info || !info[0]) | |
120 | return 0; | |
121 | ||
122 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
123 | if (!nla) | |
124 | return err; | |
125 | ||
126 | err = nla_put_string(skb, T_info_text, info); | |
127 | if (err) { | |
128 | nla_nest_cancel(skb, nla); | |
129 | return err; | |
130 | } else | |
131 | nla_nest_end(skb, nla); | |
132 | return 0; | |
b411b363 PR |
133 | } |
134 | ||
3b98c0c2 LE |
135 | /* This would be a good candidate for a "pre_doit" hook, |
136 | * and per-family private info->pointers. | |
137 | * But we need to stay compatible with older kernels. | |
138 | * If it returns successfully, adm_ctx members are valid. | |
139 | */ | |
140 | #define DRBD_ADM_NEED_MINOR 1 | |
141 | #define DRBD_ADM_NEED_CONN 2 | |
142 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, | |
143 | unsigned flags) | |
144 | { | |
145 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
146 | const u8 cmd = info->genlhdr->cmd; | |
147 | int err; | |
148 | ||
149 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
150 | ||
151 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
152 | if (cmd != DRBD_ADM_GET_STATUS | |
153 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
154 | return -EPERM; | |
155 | ||
156 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
157 | if (!adm_ctx.reply_skb) | |
158 | goto fail; | |
159 | ||
160 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
161 | info, &drbd_genl_family, 0, cmd); | |
162 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
163 | * but anyways */ | |
164 | if (!adm_ctx.reply_dh) | |
165 | goto fail; | |
166 | ||
167 | adm_ctx.reply_dh->minor = d_in->minor; | |
168 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
169 | ||
170 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { | |
171 | struct nlattr *nla; | |
172 | /* parse and validate only */ | |
173 | err = drbd_cfg_context_from_attrs(NULL, info->attrs); | |
174 | if (err) | |
175 | goto fail; | |
176 | ||
177 | /* It was present, and valid, | |
178 | * copy it over to the reply skb. */ | |
179 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
180 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
181 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
182 | if (err) | |
183 | goto fail; | |
184 | ||
185 | /* and assign stuff to the global adm_ctx */ | |
186 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
187 | adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; | |
188 | nla = nested_attr_tb[__nla_type(T_ctx_conn_name)]; | |
189 | if (nla) | |
190 | adm_ctx.conn_name = nla_data(nla); | |
191 | } else | |
192 | adm_ctx.volume = VOLUME_UNSPECIFIED; | |
193 | ||
194 | adm_ctx.minor = d_in->minor; | |
195 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
196 | adm_ctx.tconn = conn_by_name(adm_ctx.conn_name); | |
197 | ||
198 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
199 | drbd_msg_put_info("unknown minor"); | |
200 | return ERR_MINOR_INVALID; | |
201 | } | |
202 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { | |
203 | drbd_msg_put_info("unknown connection"); | |
204 | return ERR_INVALID_REQUEST; | |
205 | } | |
206 | ||
207 | /* some more paranoia, if the request was over-determined */ | |
527f4b24 LE |
208 | if (adm_ctx.mdev && adm_ctx.tconn && |
209 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
210 | pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", | |
211 | adm_ctx.minor, adm_ctx.conn_name, adm_ctx.mdev->tconn->name); | |
212 | drbd_msg_put_info("minor exists in different connection"); | |
213 | return ERR_INVALID_REQUEST; | |
214 | } | |
3b98c0c2 LE |
215 | if (adm_ctx.mdev && |
216 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
217 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
218 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
219 | adm_ctx.minor, adm_ctx.volume, | |
220 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 221 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
222 | return ERR_INVALID_REQUEST; |
223 | } | |
cffec5b2 LE |
224 | if (adm_ctx.mdev && !adm_ctx.tconn) |
225 | adm_ctx.tconn = adm_ctx.mdev->tconn; | |
3b98c0c2 LE |
226 | return NO_ERROR; |
227 | ||
228 | fail: | |
229 | nlmsg_free(adm_ctx.reply_skb); | |
230 | adm_ctx.reply_skb = NULL; | |
231 | return -ENOMEM; | |
232 | } | |
233 | ||
234 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
235 | { | |
236 | struct nlattr *nla; | |
237 | const char *conn_name = NULL; | |
238 | ||
239 | if (!adm_ctx.reply_skb) | |
240 | return -ENOMEM; | |
241 | ||
242 | adm_ctx.reply_dh->ret_code = retcode; | |
243 | ||
244 | nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; | |
245 | if (nla) { | |
246 | nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); | |
247 | if (nla) | |
248 | conn_name = nla_data(nla); | |
249 | } | |
250 | ||
251 | drbd_adm_send_reply(adm_ctx.reply_skb, info); | |
252 | return 0; | |
253 | } | |
b411b363 PR |
254 | |
255 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
256 | { | |
257 | char *envp[] = { "HOME=/", | |
258 | "TERM=linux", | |
259 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
260 | NULL, /* Will be set to address family */ | |
261 | NULL, /* Will be set to address */ | |
262 | NULL }; | |
b411b363 PR |
263 | char mb[12], af[20], ad[60], *afs; |
264 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
3b98c0c2 | 265 | struct sib_info sib; |
b411b363 PR |
266 | int ret; |
267 | ||
268 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
269 | ||
b2fb6dbe | 270 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 271 | switch (((struct sockaddr *)mdev->tconn->net_conf->peer_addr)->sa_family) { |
b411b363 PR |
272 | case AF_INET6: |
273 | afs = "ipv6"; | |
274 | snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI6", | |
89e58e75 | 275 | &((struct sockaddr_in6 *)mdev->tconn->net_conf->peer_addr)->sin6_addr); |
b411b363 PR |
276 | break; |
277 | case AF_INET: | |
278 | afs = "ipv4"; | |
279 | snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4", | |
89e58e75 | 280 | &((struct sockaddr_in *)mdev->tconn->net_conf->peer_addr)->sin_addr); |
b411b363 PR |
281 | break; |
282 | default: | |
283 | afs = "ssocks"; | |
284 | snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4", | |
89e58e75 | 285 | &((struct sockaddr_in *)mdev->tconn->net_conf->peer_addr)->sin_addr); |
b411b363 PR |
286 | } |
287 | snprintf(af, 20, "DRBD_PEER_AF=%s", afs); | |
288 | envp[3]=af; | |
289 | envp[4]=ad; | |
b2fb6dbe | 290 | put_net_conf(mdev->tconn); |
b411b363 PR |
291 | } |
292 | ||
1090c056 LE |
293 | /* The helper may take some time. |
294 | * write out any unsynced meta data changes now */ | |
295 | drbd_md_sync(mdev); | |
296 | ||
b411b363 | 297 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
298 | sib.sib_reason = SIB_HELPER_PRE; |
299 | sib.helper_name = cmd; | |
300 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
301 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
302 | if (ret) | |
303 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
304 | usermode_helper, cmd, mb, | |
305 | (ret >> 8) & 0xff, ret); | |
306 | else | |
307 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
308 | usermode_helper, cmd, mb, | |
309 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
310 | sib.sib_reason = SIB_HELPER_POST; |
311 | sib.helper_exit_code = ret; | |
312 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
313 | |
314 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
315 | ret = 0; | |
316 | ||
317 | return ret; | |
318 | } | |
319 | ||
320 | enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev) | |
321 | { | |
322 | char *ex_to_string; | |
323 | int r; | |
324 | enum drbd_disk_state nps; | |
325 | enum drbd_fencing_p fp; | |
326 | ||
327 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
328 | ||
329 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
330 | fp = mdev->ldev->dc.fencing; | |
331 | put_ldev(mdev); | |
332 | } else { | |
333 | dev_warn(DEV, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 PR |
334 | nps = mdev->state.pdsk; |
335 | goto out; | |
b411b363 PR |
336 | } |
337 | ||
b411b363 PR |
338 | r = drbd_khelper(mdev, "fence-peer"); |
339 | ||
340 | switch ((r>>8) & 0xff) { | |
341 | case 3: /* peer is inconsistent */ | |
342 | ex_to_string = "peer is inconsistent or worse"; | |
343 | nps = D_INCONSISTENT; | |
344 | break; | |
345 | case 4: /* peer got outdated, or was already outdated */ | |
346 | ex_to_string = "peer was fenced"; | |
347 | nps = D_OUTDATED; | |
348 | break; | |
349 | case 5: /* peer was down */ | |
350 | if (mdev->state.disk == D_UP_TO_DATE) { | |
351 | /* we will(have) create(d) a new UUID anyways... */ | |
352 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
353 | nps = D_OUTDATED; | |
354 | } else { | |
355 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
356 | nps = mdev->state.pdsk; | |
357 | } | |
358 | break; | |
359 | case 6: /* Peer is primary, voluntarily outdate myself. | |
360 | * This is useful when an unconnected R_SECONDARY is asked to | |
361 | * become R_PRIMARY, but finds the other peer being active. */ | |
362 | ex_to_string = "peer is active"; | |
363 | dev_warn(DEV, "Peer is primary, outdating myself.\n"); | |
364 | nps = D_UNKNOWN; | |
365 | _drbd_request_state(mdev, NS(disk, D_OUTDATED), CS_WAIT_COMPLETE); | |
366 | break; | |
367 | case 7: | |
368 | if (fp != FP_STONITH) | |
369 | dev_err(DEV, "fence-peer() = 7 && fencing != Stonith !!!\n"); | |
370 | ex_to_string = "peer was stonithed"; | |
371 | nps = D_OUTDATED; | |
372 | break; | |
373 | default: | |
374 | /* The script is broken ... */ | |
375 | nps = D_UNKNOWN; | |
376 | dev_err(DEV, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); | |
377 | return nps; | |
378 | } | |
379 | ||
380 | dev_info(DEV, "fence-peer helper returned %d (%s)\n", | |
381 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 PR |
382 | |
383 | out: | |
384 | if (mdev->state.susp_fen && nps >= D_UNKNOWN) { | |
385 | /* The handler was not successful... unfreeze here, the | |
386 | state engine can not unfreeze... */ | |
387 | _drbd_request_state(mdev, NS(susp_fen, 0), CS_VERBOSE); | |
388 | } | |
389 | ||
b411b363 PR |
390 | return nps; |
391 | } | |
392 | ||
87f7be4c PR |
393 | static int _try_outdate_peer_async(void *data) |
394 | { | |
395 | struct drbd_conf *mdev = (struct drbd_conf *)data; | |
396 | enum drbd_disk_state nps; | |
21423fa7 | 397 | union drbd_state ns; |
87f7be4c PR |
398 | |
399 | nps = drbd_try_outdate_peer(mdev); | |
21423fa7 PR |
400 | |
401 | /* Not using | |
402 | drbd_request_state(mdev, NS(pdsk, nps)); | |
99432fcc PR |
403 | here, because we might were able to re-establish the connection |
404 | in the meantime. This can only partially be solved in the state's | |
405 | engine is_valid_state() and is_valid_state_transition() | |
406 | functions. | |
407 | ||
408 | nps can be D_INCONSISTENT, D_OUTDATED or D_UNKNOWN. | |
409 | pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid, | |
410 | therefore we have to have the pre state change check here. | |
21423fa7 | 411 | */ |
87eeee41 | 412 | spin_lock_irq(&mdev->tconn->req_lock); |
21423fa7 PR |
413 | ns = mdev->state; |
414 | if (ns.conn < C_WF_REPORT_PARAMS) { | |
415 | ns.pdsk = nps; | |
416 | _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
417 | } | |
87eeee41 | 418 | spin_unlock_irq(&mdev->tconn->req_lock); |
87f7be4c PR |
419 | |
420 | return 0; | |
421 | } | |
422 | ||
423 | void drbd_try_outdate_peer_async(struct drbd_conf *mdev) | |
424 | { | |
425 | struct task_struct *opa; | |
426 | ||
427 | opa = kthread_run(_try_outdate_peer_async, mdev, "drbd%d_a_helper", mdev_to_minor(mdev)); | |
428 | if (IS_ERR(opa)) | |
429 | dev_err(DEV, "out of mem, failed to invoke fence-peer helper\n"); | |
430 | } | |
b411b363 | 431 | |
bf885f8a AG |
432 | enum drbd_state_rv |
433 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
434 | { |
435 | const int max_tries = 4; | |
bf885f8a | 436 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
b411b363 PR |
437 | int try = 0; |
438 | int forced = 0; | |
439 | union drbd_state mask, val; | |
440 | enum drbd_disk_state nps; | |
441 | ||
442 | if (new_role == R_PRIMARY) | |
0625ac19 | 443 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 444 | |
8410da8f | 445 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
446 | |
447 | mask.i = 0; mask.role = R_MASK; | |
448 | val.i = 0; val.role = new_role; | |
449 | ||
450 | while (try++ < max_tries) { | |
bf885f8a | 451 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
452 | |
453 | /* in case we first succeeded to outdate, | |
454 | * but now suddenly could establish a connection */ | |
bf885f8a | 455 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
456 | val.pdsk = 0; |
457 | mask.pdsk = 0; | |
458 | continue; | |
459 | } | |
460 | ||
bf885f8a | 461 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
462 | (mdev->state.disk < D_UP_TO_DATE && |
463 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
464 | mask.disk = D_MASK; |
465 | val.disk = D_UP_TO_DATE; | |
466 | forced = 1; | |
467 | continue; | |
468 | } | |
469 | ||
bf885f8a | 470 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
471 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
472 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
473 | nps = drbd_try_outdate_peer(mdev); | |
474 | ||
475 | if (nps == D_OUTDATED || nps == D_INCONSISTENT) { | |
476 | val.disk = D_UP_TO_DATE; | |
477 | mask.disk = D_MASK; | |
478 | } | |
479 | ||
480 | val.pdsk = nps; | |
481 | mask.pdsk = D_MASK; | |
482 | ||
483 | continue; | |
484 | } | |
485 | ||
bf885f8a | 486 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 487 | goto out; |
bf885f8a | 488 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
b411b363 PR |
489 | nps = drbd_try_outdate_peer(mdev); |
490 | ||
491 | if (force && nps > D_OUTDATED) { | |
492 | dev_warn(DEV, "Forced into split brain situation!\n"); | |
493 | nps = D_OUTDATED; | |
494 | } | |
495 | ||
496 | mask.pdsk = D_MASK; | |
497 | val.pdsk = nps; | |
498 | ||
499 | continue; | |
500 | } | |
bf885f8a | 501 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
502 | /* Maybe the peer is detected as dead very soon... |
503 | retry at most once more in this case. */ | |
89e58e75 | 504 | schedule_timeout_interruptible((mdev->tconn->net_conf->ping_timeo+1)*HZ/10); |
b411b363 PR |
505 | if (try < max_tries) |
506 | try = max_tries - 1; | |
507 | continue; | |
508 | } | |
bf885f8a AG |
509 | if (rv < SS_SUCCESS) { |
510 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 511 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 512 | if (rv < SS_SUCCESS) |
3b98c0c2 | 513 | goto out; |
b411b363 PR |
514 | } |
515 | break; | |
516 | } | |
517 | ||
bf885f8a | 518 | if (rv < SS_SUCCESS) |
3b98c0c2 | 519 | goto out; |
b411b363 PR |
520 | |
521 | if (forced) | |
522 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
523 | ||
524 | /* Wait until nothing is on the fly :) */ | |
525 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
526 | ||
527 | if (new_role == R_SECONDARY) { | |
81e84650 | 528 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
529 | if (get_ldev(mdev)) { |
530 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
531 | put_ldev(mdev); | |
532 | } | |
533 | } else { | |
b2fb6dbe | 534 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 535 | mdev->tconn->net_conf->want_lose = 0; |
b2fb6dbe | 536 | put_net_conf(mdev->tconn); |
b411b363 | 537 | } |
81e84650 | 538 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
539 | if (get_ldev(mdev)) { |
540 | if (((mdev->state.conn < C_CONNECTED || | |
541 | mdev->state.pdsk <= D_FAILED) | |
542 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
543 | drbd_uuid_new_current(mdev); | |
544 | ||
545 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
546 | put_ldev(mdev); | |
547 | } | |
548 | } | |
549 | ||
19f843aa LE |
550 | /* writeout of activity log covered areas of the bitmap |
551 | * to stable storage done in after state change already */ | |
b411b363 PR |
552 | |
553 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
554 | /* if this was forced, we should consider sync */ | |
555 | if (forced) | |
556 | drbd_send_uuids(mdev); | |
557 | drbd_send_state(mdev); | |
558 | } | |
559 | ||
560 | drbd_md_sync(mdev); | |
561 | ||
562 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 563 | out: |
8410da8f | 564 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 565 | return rv; |
b411b363 PR |
566 | } |
567 | ||
3b98c0c2 | 568 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 569 | { |
3b98c0c2 LE |
570 | return err == -ENOMSG ? "required attribute missing" : |
571 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
572 | "invalid attribute value"; | |
b411b363 PR |
573 | } |
574 | ||
3b98c0c2 | 575 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 576 | { |
3b98c0c2 LE |
577 | struct set_role_parms parms; |
578 | int err; | |
579 | enum drbd_ret_code retcode; | |
b411b363 | 580 | |
3b98c0c2 LE |
581 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
582 | if (!adm_ctx.reply_skb) | |
583 | return retcode; | |
584 | if (retcode != NO_ERROR) | |
585 | goto out; | |
586 | ||
587 | memset(&parms, 0, sizeof(parms)); | |
588 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
589 | err = set_role_parms_from_attrs(&parms, info->attrs); | |
590 | if (err) { | |
591 | retcode = ERR_MANDATORY_TAG; | |
592 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
593 | goto out; | |
594 | } | |
595 | } | |
596 | ||
597 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
598 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
599 | else | |
600 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
601 | out: | |
602 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
603 | return 0; |
604 | } | |
605 | ||
606 | /* initializes the md.*_offset members, so we are able to find | |
607 | * the on disk meta data */ | |
608 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
609 | struct drbd_backing_dev *bdev) | |
610 | { | |
611 | sector_t md_size_sect = 0; | |
612 | switch (bdev->dc.meta_dev_idx) { | |
613 | default: | |
614 | /* v07 style fixed size indexed meta data */ | |
615 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
616 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
617 | bdev->md.al_offset = MD_AL_OFFSET; | |
618 | bdev->md.bm_offset = MD_BM_OFFSET; | |
619 | break; | |
620 | case DRBD_MD_INDEX_FLEX_EXT: | |
621 | /* just occupy the full device; unit: sectors */ | |
622 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
623 | bdev->md.md_offset = 0; | |
624 | bdev->md.al_offset = MD_AL_OFFSET; | |
625 | bdev->md.bm_offset = MD_BM_OFFSET; | |
626 | break; | |
627 | case DRBD_MD_INDEX_INTERNAL: | |
628 | case DRBD_MD_INDEX_FLEX_INT: | |
629 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
630 | /* al size is still fixed */ | |
7ad651b5 | 631 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
632 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
633 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
634 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
635 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
636 | md_size_sect = ALIGN(md_size_sect, 8); | |
637 | ||
638 | /* plus the "drbd meta data super block", | |
639 | * and the activity log; */ | |
640 | md_size_sect += MD_BM_OFFSET; | |
641 | ||
642 | bdev->md.md_size_sect = md_size_sect; | |
643 | /* bitmap offset is adjusted by 'super' block size */ | |
644 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
645 | break; | |
646 | } | |
647 | } | |
648 | ||
4b0715f0 | 649 | /* input size is expected to be in KB */ |
b411b363 PR |
650 | char *ppsize(char *buf, unsigned long long size) |
651 | { | |
4b0715f0 LE |
652 | /* Needs 9 bytes at max including trailing NUL: |
653 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
654 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
655 | int base = 0; | |
4b0715f0 | 656 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
657 | /* shift + round */ |
658 | size = (size >> 10) + !!(size & (1<<9)); | |
659 | base++; | |
660 | } | |
4b0715f0 | 661 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
662 | |
663 | return buf; | |
664 | } | |
665 | ||
666 | /* there is still a theoretical deadlock when called from receiver | |
667 | * on an D_INCONSISTENT R_PRIMARY: | |
668 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
669 | * packet from remote to dec_ap_bio again. | |
670 | * receiver receive_sizes(), comes here, | |
671 | * waits for ap_bio_cnt == 0. -> deadlock. | |
672 | * but this cannot happen, actually, because: | |
673 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
674 | * (not connected, or bad/no disk on peer): | |
675 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
676 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
677 | * peer may not initiate a resize. | |
678 | */ | |
3b98c0c2 LE |
679 | /* Note these are not to be confused with |
680 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
681 | * which are (sub) state changes triggered by admin (drbdsetup), | |
682 | * and can be long lived. | |
683 | * This changes an mdev->flag, is triggered by drbd internals, | |
684 | * and should be short-lived. */ | |
b411b363 PR |
685 | void drbd_suspend_io(struct drbd_conf *mdev) |
686 | { | |
687 | set_bit(SUSPEND_IO, &mdev->flags); | |
fb22c402 | 688 | if (is_susp(mdev->state)) |
265be2d0 | 689 | return; |
b411b363 PR |
690 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
691 | } | |
692 | ||
693 | void drbd_resume_io(struct drbd_conf *mdev) | |
694 | { | |
695 | clear_bit(SUSPEND_IO, &mdev->flags); | |
696 | wake_up(&mdev->misc_wait); | |
697 | } | |
698 | ||
699 | /** | |
700 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
701 | * @mdev: DRBD device. | |
702 | * | |
703 | * Returns 0 on success, negative return values indicate errors. | |
704 | * You should call drbd_md_sync() after calling this function. | |
705 | */ | |
24c4830c | 706 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
707 | { |
708 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
709 | sector_t la_size; | |
710 | sector_t size; | |
711 | char ppb[10]; | |
712 | ||
713 | int md_moved, la_size_changed; | |
714 | enum determine_dev_size rv = unchanged; | |
715 | ||
716 | /* race: | |
717 | * application request passes inc_ap_bio, | |
718 | * but then cannot get an AL-reference. | |
719 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
720 | * | |
721 | * to avoid that: | |
722 | * Suspend IO right here. | |
723 | * still lock the act_log to not trigger ASSERTs there. | |
724 | */ | |
725 | drbd_suspend_io(mdev); | |
726 | ||
727 | /* no wait necessary anymore, actually we could assert that */ | |
728 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
729 | ||
730 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
731 | prev_size = mdev->ldev->md.md_size_sect; | |
732 | la_size = mdev->ldev->md.la_size_sect; | |
733 | ||
734 | /* TODO: should only be some assert here, not (re)init... */ | |
735 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
736 | ||
d845030f | 737 | size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED); |
b411b363 PR |
738 | |
739 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
740 | drbd_bm_capacity(mdev) != size) { | |
741 | int err; | |
02d9a94b | 742 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
743 | if (unlikely(err)) { |
744 | /* currently there is only one error: ENOMEM! */ | |
745 | size = drbd_bm_capacity(mdev)>>1; | |
746 | if (size == 0) { | |
747 | dev_err(DEV, "OUT OF MEMORY! " | |
748 | "Could not allocate bitmap!\n"); | |
749 | } else { | |
750 | dev_err(DEV, "BM resizing failed. " | |
751 | "Leaving size unchanged at size = %lu KB\n", | |
752 | (unsigned long)size); | |
753 | } | |
754 | rv = dev_size_error; | |
755 | } | |
756 | /* racy, see comments above. */ | |
757 | drbd_set_my_capacity(mdev, size); | |
758 | mdev->ldev->md.la_size_sect = size; | |
759 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
760 | (unsigned long long)size>>1); | |
761 | } | |
762 | if (rv == dev_size_error) | |
763 | goto out; | |
764 | ||
765 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
766 | ||
767 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
768 | || prev_size != mdev->ldev->md.md_size_sect; | |
769 | ||
770 | if (la_size_changed || md_moved) { | |
24dccabb AG |
771 | int err; |
772 | ||
b411b363 PR |
773 | drbd_al_shrink(mdev); /* All extents inactive. */ |
774 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
775 | la_size_changed && md_moved ? "size changed and md moved" : | |
776 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
777 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
778 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
779 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
780 | if (err) { |
781 | rv = dev_size_error; | |
782 | goto out; | |
783 | } | |
b411b363 PR |
784 | drbd_md_mark_dirty(mdev); |
785 | } | |
786 | ||
787 | if (size > la_size) | |
788 | rv = grew; | |
789 | if (size < la_size) | |
790 | rv = shrunk; | |
791 | out: | |
792 | lc_unlock(mdev->act_log); | |
793 | wake_up(&mdev->al_wait); | |
794 | drbd_resume_io(mdev); | |
795 | ||
796 | return rv; | |
797 | } | |
798 | ||
799 | sector_t | |
a393db6f | 800 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space) |
b411b363 PR |
801 | { |
802 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
803 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
804 | sector_t m_size; /* my size */ | |
805 | sector_t u_size = bdev->dc.disk_size; /* size requested by user. */ | |
806 | sector_t size = 0; | |
807 | ||
808 | m_size = drbd_get_max_capacity(bdev); | |
809 | ||
a393db6f PR |
810 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
811 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
812 | p_size = m_size; | |
813 | } | |
814 | ||
b411b363 PR |
815 | if (p_size && m_size) { |
816 | size = min_t(sector_t, p_size, m_size); | |
817 | } else { | |
818 | if (la_size) { | |
819 | size = la_size; | |
820 | if (m_size && m_size < size) | |
821 | size = m_size; | |
822 | if (p_size && p_size < size) | |
823 | size = p_size; | |
824 | } else { | |
825 | if (m_size) | |
826 | size = m_size; | |
827 | if (p_size) | |
828 | size = p_size; | |
829 | } | |
830 | } | |
831 | ||
832 | if (size == 0) | |
833 | dev_err(DEV, "Both nodes diskless!\n"); | |
834 | ||
835 | if (u_size) { | |
836 | if (u_size > size) | |
837 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
838 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
839 | else | |
840 | size = u_size; | |
841 | } | |
842 | ||
843 | return size; | |
844 | } | |
845 | ||
846 | /** | |
847 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
848 | * @mdev: DRBD device. | |
849 | * | |
850 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
851 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
852 | * this function. | |
853 | */ | |
854 | static int drbd_check_al_size(struct drbd_conf *mdev) | |
855 | { | |
856 | struct lru_cache *n, *t; | |
857 | struct lc_element *e; | |
858 | unsigned int in_use; | |
859 | int i; | |
860 | ||
7ad651b5 LE |
861 | if (!expect(mdev->sync_conf.al_extents >= DRBD_AL_EXTENTS_MIN)) |
862 | mdev->sync_conf.al_extents = DRBD_AL_EXTENTS_MIN; | |
b411b363 PR |
863 | |
864 | if (mdev->act_log && | |
865 | mdev->act_log->nr_elements == mdev->sync_conf.al_extents) | |
866 | return 0; | |
867 | ||
868 | in_use = 0; | |
869 | t = mdev->act_log; | |
7ad651b5 | 870 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
b411b363 PR |
871 | mdev->sync_conf.al_extents, sizeof(struct lc_element), 0); |
872 | ||
873 | if (n == NULL) { | |
874 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
875 | return -ENOMEM; | |
876 | } | |
877 | spin_lock_irq(&mdev->al_lock); | |
878 | if (t) { | |
879 | for (i = 0; i < t->nr_elements; i++) { | |
880 | e = lc_element_by_index(t, i); | |
881 | if (e->refcnt) | |
882 | dev_err(DEV, "refcnt(%d)==%d\n", | |
883 | e->lc_number, e->refcnt); | |
884 | in_use += e->refcnt; | |
885 | } | |
886 | } | |
887 | if (!in_use) | |
888 | mdev->act_log = n; | |
889 | spin_unlock_irq(&mdev->al_lock); | |
890 | if (in_use) { | |
891 | dev_err(DEV, "Activity log still in use!\n"); | |
892 | lc_destroy(n); | |
893 | return -EBUSY; | |
894 | } else { | |
895 | if (t) | |
896 | lc_destroy(t); | |
897 | } | |
898 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
899 | return 0; | |
900 | } | |
901 | ||
99432fcc | 902 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
903 | { |
904 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
905 | int max_hw_sectors = max_bio_size >> 9; |
906 | int max_segments = 0; | |
907 | ||
908 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
909 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
910 | ||
911 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
912 | max_segments = mdev->ldev->dc.max_bio_bvecs; | |
913 | put_ldev(mdev); | |
914 | } | |
b411b363 | 915 | |
b411b363 | 916 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
917 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
918 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
919 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
920 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 921 | |
99432fcc PR |
922 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
923 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
924 | ||
925 | blk_queue_stack_limits(q, b); | |
926 | ||
927 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
928 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
929 | q->backing_dev_info.ra_pages, | |
930 | b->backing_dev_info.ra_pages); | |
931 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
932 | } | |
933 | put_ldev(mdev); | |
934 | } | |
935 | } | |
936 | ||
937 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
938 | { | |
939 | int now, new, local, peer; | |
940 | ||
941 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
942 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
943 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 944 | |
99432fcc PR |
945 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
946 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
947 | mdev->local_max_bio_size = local; | |
948 | put_ldev(mdev); | |
b411b363 | 949 | } |
99432fcc PR |
950 | |
951 | /* We may ignore peer limits if the peer is modern enough. | |
952 | Because new from 8.3.8 onwards the peer can use multiple | |
953 | BIOs for a single peer_request */ | |
954 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 955 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 956 | peer = mdev->peer_max_bio_size; |
31890f4a | 957 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
958 | peer = DRBD_MAX_SIZE_H80_PACKET; |
959 | else /* drbd 8.3.8 onwards */ | |
960 | peer = DRBD_MAX_BIO_SIZE; | |
961 | } | |
962 | ||
963 | new = min_t(int, local, peer); | |
964 | ||
965 | if (mdev->state.role == R_PRIMARY && new < now) | |
966 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
967 | ||
968 | if (new != now) | |
969 | dev_info(DEV, "max BIO size = %u\n", new); | |
970 | ||
971 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
972 | } |
973 | ||
974 | /* serialize deconfig (worker exiting, doing cleanup) | |
975 | * and reconfig (drbdsetup disk, drbdsetup net) | |
976 | * | |
c518d04f LE |
977 | * Wait for a potentially exiting worker, then restart it, |
978 | * or start a new one. Flush any pending work, there may still be an | |
979 | * after_state_change queued. | |
b411b363 | 980 | */ |
0e29d163 | 981 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 982 | { |
0e29d163 PR |
983 | wait_event(tconn->ping_wait, !test_and_set_bit(CONFIG_PENDING, &tconn->flags)); |
984 | wait_event(tconn->ping_wait, !test_bit(OBJECT_DYING, &tconn->flags)); | |
985 | drbd_thread_start(&tconn->worker); | |
986 | conn_flush_workqueue(tconn); | |
b411b363 PR |
987 | } |
988 | ||
989 | /* if still unconfigured, stops worker again. | |
990 | * if configured now, clears CONFIG_PENDING. | |
991 | * wakes potential waiters */ | |
0e29d163 | 992 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 993 | { |
0e29d163 PR |
994 | spin_lock_irq(&tconn->req_lock); |
995 | if (conn_all_vols_unconf(tconn)) { | |
996 | set_bit(OBJECT_DYING, &tconn->flags); | |
997 | drbd_thread_stop_nowait(&tconn->worker); | |
b411b363 | 998 | } else |
0e29d163 PR |
999 | clear_bit(CONFIG_PENDING, &tconn->flags); |
1000 | spin_unlock_irq(&tconn->req_lock); | |
1001 | wake_up(&tconn->ping_wait); | |
b411b363 PR |
1002 | } |
1003 | ||
0778286a PR |
1004 | /* Make sure IO is suspended before calling this function(). */ |
1005 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1006 | { | |
1007 | int s = 0; | |
1008 | ||
61610420 | 1009 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1010 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1011 | return; | |
1012 | } | |
1013 | ||
61610420 | 1014 | drbd_al_shrink(mdev); |
87eeee41 | 1015 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1016 | if (mdev->state.conn < C_CONNECTED) |
1017 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1018 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1019 | lc_unlock(mdev->act_log); |
0778286a PR |
1020 | |
1021 | if (s) | |
1022 | dev_info(DEV, "Suspended AL updates\n"); | |
1023 | } | |
1024 | ||
3b98c0c2 | 1025 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1026 | { |
3b98c0c2 LE |
1027 | struct drbd_conf *mdev; |
1028 | int err; | |
116676ca | 1029 | enum drbd_ret_code retcode; |
b411b363 PR |
1030 | enum determine_dev_size dd; |
1031 | sector_t max_possible_sectors; | |
1032 | sector_t min_md_device_sectors; | |
1033 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
e525fd89 | 1034 | struct block_device *bdev; |
b411b363 PR |
1035 | struct lru_cache *resync_lru = NULL; |
1036 | union drbd_state ns, os; | |
f2024e7c | 1037 | enum drbd_state_rv rv; |
b411b363 | 1038 | int cp_discovered = 0; |
b411b363 | 1039 | |
3b98c0c2 LE |
1040 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1041 | if (!adm_ctx.reply_skb) | |
1042 | return retcode; | |
1043 | if (retcode != NO_ERROR) | |
40cbf085 | 1044 | goto finish; |
3b98c0c2 LE |
1045 | |
1046 | mdev = adm_ctx.mdev; | |
0e29d163 | 1047 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1048 | |
1049 | /* if you want to reconfigure, please tear down first */ | |
1050 | if (mdev->state.disk > D_DISKLESS) { | |
1051 | retcode = ERR_DISK_CONFIGURED; | |
1052 | goto fail; | |
1053 | } | |
82f59cc6 LE |
1054 | /* It may just now have detached because of IO error. Make sure |
1055 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1056 | * e.g. if someone calls attach from the on-io-error handler, | |
1057 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1058 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1059 | |
3b98c0c2 | 1060 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1061 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1062 | if (!nbc) { | |
1063 | retcode = ERR_NOMEM; | |
1064 | goto fail; | |
1065 | } | |
1066 | ||
1067 | nbc->dc.disk_size = DRBD_DISK_SIZE_SECT_DEF; | |
1068 | nbc->dc.on_io_error = DRBD_ON_IO_ERROR_DEF; | |
1069 | nbc->dc.fencing = DRBD_FENCING_DEF; | |
1070 | nbc->dc.max_bio_bvecs = DRBD_MAX_BIO_BVECS_DEF; | |
1071 | ||
3b98c0c2 LE |
1072 | err = disk_conf_from_attrs(&nbc->dc, info->attrs); |
1073 | if (err) { | |
b411b363 | 1074 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1075 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1076 | goto fail; |
1077 | } | |
1078 | ||
3b98c0c2 | 1079 | if ((int)nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1080 | retcode = ERR_MD_IDX_INVALID; |
1081 | goto fail; | |
1082 | } | |
1083 | ||
b2fb6dbe | 1084 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 1085 | int prot = mdev->tconn->net_conf->wire_protocol; |
b2fb6dbe | 1086 | put_net_conf(mdev->tconn); |
47ff2d0a PR |
1087 | if (nbc->dc.fencing == FP_STONITH && prot == DRBD_PROT_A) { |
1088 | retcode = ERR_STONITH_AND_PROT_A; | |
1089 | goto fail; | |
1090 | } | |
1091 | } | |
1092 | ||
d4d77629 TH |
1093 | bdev = blkdev_get_by_path(nbc->dc.backing_dev, |
1094 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); | |
e525fd89 | 1095 | if (IS_ERR(bdev)) { |
b411b363 | 1096 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev, |
e525fd89 | 1097 | PTR_ERR(bdev)); |
b411b363 PR |
1098 | retcode = ERR_OPEN_DISK; |
1099 | goto fail; | |
1100 | } | |
e525fd89 TH |
1101 | nbc->backing_bdev = bdev; |
1102 | ||
1103 | /* | |
1104 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1105 | * drbd sharing one meta device. TODO in that case, paranoia | |
1106 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1107 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1108 | * should check it for you already; but if you don't, or | |
1109 | * someone fooled it, we need to double check here) | |
1110 | */ | |
d4d77629 TH |
1111 | bdev = blkdev_get_by_path(nbc->dc.meta_dev, |
1112 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
3b98c0c2 | 1113 | ((int)nbc->dc.meta_dev_idx < 0) ? |
d4d77629 | 1114 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1115 | if (IS_ERR(bdev)) { |
b411b363 | 1116 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev, |
e525fd89 | 1117 | PTR_ERR(bdev)); |
b411b363 PR |
1118 | retcode = ERR_OPEN_MD_DISK; |
1119 | goto fail; | |
1120 | } | |
e525fd89 | 1121 | nbc->md_bdev = bdev; |
b411b363 | 1122 | |
e525fd89 TH |
1123 | if ((nbc->backing_bdev == nbc->md_bdev) != |
1124 | (nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL || | |
1125 | nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
1126 | retcode = ERR_MD_IDX_INVALID; | |
b411b363 PR |
1127 | goto fail; |
1128 | } | |
1129 | ||
1130 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1131 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1132 | offsetof(struct bm_extent, lce)); |
1133 | if (!resync_lru) { | |
1134 | retcode = ERR_NOMEM; | |
e525fd89 | 1135 | goto fail; |
b411b363 PR |
1136 | } |
1137 | ||
1138 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1139 | drbd_md_set_sector_offsets(mdev, nbc); | |
1140 | ||
1141 | if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) { | |
1142 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", | |
1143 | (unsigned long long) drbd_get_max_capacity(nbc), | |
1144 | (unsigned long long) nbc->dc.disk_size); | |
1145 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1146 | goto fail; |
b411b363 PR |
1147 | } |
1148 | ||
3b98c0c2 | 1149 | if ((int)nbc->dc.meta_dev_idx < 0) { |
b411b363 PR |
1150 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1151 | /* at least one MB, otherwise it does not make sense */ | |
1152 | min_md_device_sectors = (2<<10); | |
1153 | } else { | |
1154 | max_possible_sectors = DRBD_MAX_SECTORS; | |
1155 | min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1); | |
1156 | } | |
1157 | ||
b411b363 PR |
1158 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
1159 | retcode = ERR_MD_DISK_TO_SMALL; | |
1160 | dev_warn(DEV, "refusing attach: md-device too small, " | |
1161 | "at least %llu sectors needed for this meta-disk type\n", | |
1162 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1163 | goto fail; |
b411b363 PR |
1164 | } |
1165 | ||
1166 | /* Make sure the new disk is big enough | |
1167 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1168 | if (drbd_get_max_capacity(nbc) < | |
1169 | drbd_get_capacity(mdev->this_bdev)) { | |
1170 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1171 | goto fail; |
b411b363 PR |
1172 | } |
1173 | ||
1174 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1175 | ||
1352994b LE |
1176 | if (nbc->known_size > max_possible_sectors) { |
1177 | dev_warn(DEV, "==> truncating very big lower level device " | |
1178 | "to currently maximum possible %llu sectors <==\n", | |
1179 | (unsigned long long) max_possible_sectors); | |
3b98c0c2 | 1180 | if ((int)nbc->dc.meta_dev_idx >= 0) |
1352994b LE |
1181 | dev_warn(DEV, "==>> using internal or flexible " |
1182 | "meta data may help <<==\n"); | |
1183 | } | |
1184 | ||
b411b363 PR |
1185 | drbd_suspend_io(mdev); |
1186 | /* also wait for the last barrier ack. */ | |
fb22c402 | 1187 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || is_susp(mdev->state)); |
b411b363 | 1188 | /* and for any other previously queued work */ |
a21e9298 | 1189 | drbd_flush_workqueue(mdev); |
b411b363 | 1190 | |
f2024e7c AG |
1191 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1192 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1193 | drbd_resume_io(mdev); |
f2024e7c | 1194 | if (rv < SS_SUCCESS) |
e525fd89 | 1195 | goto fail; |
b411b363 PR |
1196 | |
1197 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1198 | goto force_diskless; | |
1199 | ||
1200 | drbd_md_set_sector_offsets(mdev, nbc); | |
1201 | ||
1202 | if (!mdev->bitmap) { | |
1203 | if (drbd_bm_init(mdev)) { | |
1204 | retcode = ERR_NOMEM; | |
1205 | goto force_diskless_dec; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | retcode = drbd_md_read(mdev, nbc); | |
1210 | if (retcode != NO_ERROR) | |
1211 | goto force_diskless_dec; | |
1212 | ||
1213 | if (mdev->state.conn < C_CONNECTED && | |
1214 | mdev->state.role == R_PRIMARY && | |
1215 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1216 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1217 | (unsigned long long)mdev->ed_uuid); | |
1218 | retcode = ERR_DATA_NOT_CURRENT; | |
1219 | goto force_diskless_dec; | |
1220 | } | |
1221 | ||
1222 | /* Since we are diskless, fix the activity log first... */ | |
1223 | if (drbd_check_al_size(mdev)) { | |
1224 | retcode = ERR_NOMEM; | |
1225 | goto force_diskless_dec; | |
1226 | } | |
1227 | ||
1228 | /* Prevent shrinking of consistent devices ! */ | |
1229 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
a393db6f | 1230 | drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) { |
b411b363 PR |
1231 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
1232 | retcode = ERR_DISK_TO_SMALL; | |
1233 | goto force_diskless_dec; | |
1234 | } | |
1235 | ||
1236 | if (!drbd_al_read_log(mdev, nbc)) { | |
1237 | retcode = ERR_IO_MD_DISK; | |
1238 | goto force_diskless_dec; | |
1239 | } | |
1240 | ||
b411b363 PR |
1241 | /* Reset the "barriers don't work" bits here, then force meta data to |
1242 | * be written, to ensure we determine if barriers are supported. */ | |
1243 | if (nbc->dc.no_md_flush) | |
a8a4e51e | 1244 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1245 | else |
a8a4e51e | 1246 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1247 | |
1248 | /* Point of no return reached. | |
1249 | * Devices and memory are no longer released by error cleanup below. | |
1250 | * now mdev takes over responsibility, and the state engine should | |
1251 | * clean it up somewhere. */ | |
1252 | D_ASSERT(mdev->ldev == NULL); | |
1253 | mdev->ldev = nbc; | |
1254 | mdev->resync = resync_lru; | |
1255 | nbc = NULL; | |
1256 | resync_lru = NULL; | |
1257 | ||
2451fc3b PR |
1258 | mdev->write_ordering = WO_bdev_flush; |
1259 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1260 | |
1261 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1262 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1263 | else | |
1264 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1265 | ||
894c6a94 | 1266 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
fb22c402 | 1267 | !(mdev->state.role == R_PRIMARY && mdev->state.susp_nod)) { |
b411b363 PR |
1268 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1269 | cp_discovered = 1; | |
1270 | } | |
1271 | ||
1272 | mdev->send_cnt = 0; | |
1273 | mdev->recv_cnt = 0; | |
1274 | mdev->read_cnt = 0; | |
1275 | mdev->writ_cnt = 0; | |
1276 | ||
99432fcc | 1277 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1278 | |
1279 | /* If I am currently not R_PRIMARY, | |
1280 | * but meta data primary indicator is set, | |
1281 | * I just now recover from a hard crash, | |
1282 | * and have been R_PRIMARY before that crash. | |
1283 | * | |
1284 | * Now, if I had no connection before that crash | |
1285 | * (have been degraded R_PRIMARY), chances are that | |
1286 | * I won't find my peer now either. | |
1287 | * | |
1288 | * In that case, and _only_ in that case, | |
1289 | * we use the degr-wfc-timeout instead of the default, | |
1290 | * so we can automatically recover from a crash of a | |
1291 | * degraded but active "cluster" after a certain timeout. | |
1292 | */ | |
1293 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1294 | if (mdev->state.role != R_PRIMARY && | |
1295 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1296 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1297 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1298 | ||
24c4830c | 1299 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1300 | if (dd == dev_size_error) { |
1301 | retcode = ERR_NOMEM_BITMAP; | |
1302 | goto force_diskless_dec; | |
1303 | } else if (dd == grew) | |
1304 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1305 | ||
1306 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1307 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1308 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1309 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1310 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1311 | retcode = ERR_IO_MD_DISK; |
1312 | goto force_diskless_dec; | |
1313 | } | |
1314 | } else { | |
20ceb2b2 LE |
1315 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
1316 | "read from attaching", BM_LOCKED_MASK) < 0) { | |
b411b363 PR |
1317 | retcode = ERR_IO_MD_DISK; |
1318 | goto force_diskless_dec; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | if (cp_discovered) { | |
1323 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1324 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1325 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1326 | retcode = ERR_IO_MD_DISK; |
1327 | goto force_diskless_dec; | |
1328 | } | |
b411b363 PR |
1329 | } |
1330 | ||
0778286a PR |
1331 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1332 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1333 | ||
87eeee41 | 1334 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1335 | os = mdev->state; |
1336 | ns.i = os.i; | |
1337 | /* If MDF_CONSISTENT is not set go into inconsistent state, | |
1338 | otherwise investigate MDF_WasUpToDate... | |
1339 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1340 | otherwise into D_CONSISTENT state. | |
1341 | */ | |
1342 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1343 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1344 | ns.disk = D_CONSISTENT; | |
1345 | else | |
1346 | ns.disk = D_OUTDATED; | |
1347 | } else { | |
1348 | ns.disk = D_INCONSISTENT; | |
1349 | } | |
1350 | ||
1351 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1352 | ns.pdsk = D_OUTDATED; | |
1353 | ||
1354 | if ( ns.disk == D_CONSISTENT && | |
1355 | (ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE)) | |
1356 | ns.disk = D_UP_TO_DATE; | |
1357 | ||
1358 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1359 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1360 | this point, because drbd_request_state() modifies these | |
1361 | flags. */ | |
1362 | ||
1363 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1364 | state after the negotiation phase. */ | |
1365 | if (mdev->state.conn == C_CONNECTED) { | |
1366 | mdev->new_state_tmp.i = ns.i; | |
1367 | ns.i = os.i; | |
1368 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1369 | |
1370 | /* We expect to receive up-to-date UUIDs soon. | |
1371 | To avoid a race in receive_state, free p_uuid while | |
1372 | holding req_lock. I.e. atomic with the state change */ | |
1373 | kfree(mdev->p_uuid); | |
1374 | mdev->p_uuid = NULL; | |
b411b363 PR |
1375 | } |
1376 | ||
1377 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
1378 | ns = mdev->state; | |
87eeee41 | 1379 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1380 | |
1381 | if (rv < SS_SUCCESS) | |
1382 | goto force_diskless_dec; | |
1383 | ||
1384 | if (mdev->state.role == R_PRIMARY) | |
1385 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1386 | else | |
1387 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1388 | ||
1389 | drbd_md_mark_dirty(mdev); | |
1390 | drbd_md_sync(mdev); | |
1391 | ||
1392 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1393 | put_ldev(mdev); | |
0e29d163 | 1394 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1395 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1396 | return 0; |
1397 | ||
1398 | force_diskless_dec: | |
1399 | put_ldev(mdev); | |
1400 | force_diskless: | |
82f59cc6 | 1401 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1402 | drbd_md_sync(mdev); |
b411b363 | 1403 | fail: |
40cbf085 | 1404 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1405 | if (nbc) { |
e525fd89 TH |
1406 | if (nbc->backing_bdev) |
1407 | blkdev_put(nbc->backing_bdev, | |
1408 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1409 | if (nbc->md_bdev) | |
1410 | blkdev_put(nbc->md_bdev, | |
1411 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1412 | kfree(nbc); |
1413 | } | |
1414 | lc_destroy(resync_lru); | |
1415 | ||
40cbf085 | 1416 | finish: |
3b98c0c2 | 1417 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1418 | return 0; |
1419 | } | |
1420 | ||
85f75dd7 LE |
1421 | static int adm_detach(struct drbd_conf *mdev) |
1422 | { | |
1423 | enum drbd_ret_code retcode; | |
1424 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ | |
1425 | retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS)); | |
1426 | wait_event(mdev->misc_wait, | |
1427 | mdev->state.disk != D_DISKLESS || | |
1428 | !atomic_read(&mdev->local_cnt)); | |
1429 | drbd_resume_io(mdev); | |
1430 | return retcode; | |
1431 | } | |
1432 | ||
82f59cc6 LE |
1433 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1434 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1435 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1436 | * internal references as well. | |
1437 | * Only then we have finally detached. */ | |
3b98c0c2 | 1438 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1439 | { |
9a0d9d03 | 1440 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1441 | |
1442 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1443 | if (!adm_ctx.reply_skb) | |
1444 | return retcode; | |
1445 | if (retcode != NO_ERROR) | |
1446 | goto out; | |
1447 | ||
85f75dd7 | 1448 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1449 | out: |
1450 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1451 | return 0; |
1452 | } | |
1453 | ||
3b98c0c2 | 1454 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1455 | { |
3b98c0c2 LE |
1456 | char hmac_name[CRYPTO_MAX_ALG_NAME]; |
1457 | struct drbd_conf *mdev; | |
b411b363 PR |
1458 | struct net_conf *new_conf = NULL; |
1459 | struct crypto_hash *tfm = NULL; | |
1460 | struct crypto_hash *integrity_w_tfm = NULL; | |
1461 | struct crypto_hash *integrity_r_tfm = NULL; | |
b411b363 PR |
1462 | void *int_dig_out = NULL; |
1463 | void *int_dig_in = NULL; | |
1464 | void *int_dig_vv = NULL; | |
80883197 | 1465 | struct drbd_tconn *oconn; |
3b98c0c2 | 1466 | struct drbd_tconn *tconn; |
b411b363 | 1467 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1468 | enum drbd_ret_code retcode; |
1469 | int i; | |
1470 | int err; | |
b411b363 | 1471 | |
3b98c0c2 LE |
1472 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1473 | if (!adm_ctx.reply_skb) | |
1474 | return retcode; | |
1475 | if (retcode != NO_ERROR) | |
1476 | goto out; | |
1477 | ||
1478 | tconn = adm_ctx.tconn; | |
80883197 | 1479 | conn_reconfig_start(tconn); |
b411b363 | 1480 | |
80883197 | 1481 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
1482 | retcode = ERR_NET_CONFIGURED; |
1483 | goto fail; | |
1484 | } | |
1485 | ||
1486 | /* allocation not in the IO path, cqueue thread context */ | |
2db4e42e | 1487 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
b411b363 PR |
1488 | if (!new_conf) { |
1489 | retcode = ERR_NOMEM; | |
1490 | goto fail; | |
1491 | } | |
1492 | ||
b411b363 PR |
1493 | new_conf->timeout = DRBD_TIMEOUT_DEF; |
1494 | new_conf->try_connect_int = DRBD_CONNECT_INT_DEF; | |
1495 | new_conf->ping_int = DRBD_PING_INT_DEF; | |
1496 | new_conf->max_epoch_size = DRBD_MAX_EPOCH_SIZE_DEF; | |
1497 | new_conf->max_buffers = DRBD_MAX_BUFFERS_DEF; | |
1498 | new_conf->unplug_watermark = DRBD_UNPLUG_WATERMARK_DEF; | |
1499 | new_conf->sndbuf_size = DRBD_SNDBUF_SIZE_DEF; | |
1500 | new_conf->rcvbuf_size = DRBD_RCVBUF_SIZE_DEF; | |
1501 | new_conf->ko_count = DRBD_KO_COUNT_DEF; | |
1502 | new_conf->after_sb_0p = DRBD_AFTER_SB_0P_DEF; | |
1503 | new_conf->after_sb_1p = DRBD_AFTER_SB_1P_DEF; | |
1504 | new_conf->after_sb_2p = DRBD_AFTER_SB_2P_DEF; | |
1505 | new_conf->want_lose = 0; | |
1506 | new_conf->two_primaries = 0; | |
1507 | new_conf->wire_protocol = DRBD_PROT_C; | |
1508 | new_conf->ping_timeo = DRBD_PING_TIMEO_DEF; | |
1509 | new_conf->rr_conflict = DRBD_RR_CONFLICT_DEF; | |
422028b1 PR |
1510 | new_conf->on_congestion = DRBD_ON_CONGESTION_DEF; |
1511 | new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF; | |
b411b363 | 1512 | |
3b98c0c2 LE |
1513 | err = net_conf_from_attrs(new_conf, info->attrs); |
1514 | if (err) { | |
b411b363 | 1515 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1516 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1517 | goto fail; |
1518 | } | |
1519 | ||
1520 | if (new_conf->two_primaries | |
1521 | && (new_conf->wire_protocol != DRBD_PROT_C)) { | |
1522 | retcode = ERR_NOT_PROTO_C; | |
1523 | goto fail; | |
47ff2d0a PR |
1524 | } |
1525 | ||
80883197 PR |
1526 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1527 | if (get_ldev(mdev)) { | |
1528 | enum drbd_fencing_p fp = mdev->ldev->dc.fencing; | |
1529 | put_ldev(mdev); | |
1530 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) { | |
1531 | retcode = ERR_STONITH_AND_PROT_A; | |
1532 | goto fail; | |
1533 | } | |
1534 | } | |
1535 | if (mdev->state.role == R_PRIMARY && new_conf->want_lose) { | |
1536 | retcode = ERR_DISCARD; | |
47ff2d0a PR |
1537 | goto fail; |
1538 | } | |
80883197 PR |
1539 | if (!mdev->bitmap) { |
1540 | if(drbd_bm_init(mdev)) { | |
1541 | retcode = ERR_NOMEM; | |
1542 | goto fail; | |
1543 | } | |
1544 | } | |
47ff2d0a | 1545 | } |
b411b363 | 1546 | |
422028b1 PR |
1547 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) { |
1548 | retcode = ERR_CONG_NOT_PROTO_A; | |
1549 | goto fail; | |
1550 | } | |
1551 | ||
b411b363 PR |
1552 | retcode = NO_ERROR; |
1553 | ||
1554 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
1555 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b LE |
1556 | |
1557 | /* No need to take drbd_cfg_mutex here. All reconfiguration is | |
1558 | * strictly serialized on genl_lock(). We are protected against | |
1559 | * concurrent reconfiguration/addition/deletion */ | |
80883197 PR |
1560 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
1561 | if (oconn == tconn) | |
b411b363 | 1562 | continue; |
80883197 PR |
1563 | if (get_net_conf(oconn)) { |
1564 | taken_addr = (struct sockaddr *)&oconn->net_conf->my_addr; | |
1565 | if (new_conf->my_addr_len == oconn->net_conf->my_addr_len && | |
b411b363 PR |
1566 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
1567 | retcode = ERR_LOCAL_ADDR; | |
1568 | ||
80883197 PR |
1569 | taken_addr = (struct sockaddr *)&oconn->net_conf->peer_addr; |
1570 | if (new_conf->peer_addr_len == oconn->net_conf->peer_addr_len && | |
b411b363 PR |
1571 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
1572 | retcode = ERR_PEER_ADDR; | |
1573 | ||
80883197 | 1574 | put_net_conf(oconn); |
b411b363 PR |
1575 | if (retcode != NO_ERROR) |
1576 | goto fail; | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | if (new_conf->cram_hmac_alg[0] != 0) { | |
1581 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1582 | new_conf->cram_hmac_alg); | |
1583 | tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC); | |
1584 | if (IS_ERR(tfm)) { | |
1585 | tfm = NULL; | |
1586 | retcode = ERR_AUTH_ALG; | |
1587 | goto fail; | |
1588 | } | |
1589 | ||
0798219f | 1590 | if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) { |
b411b363 PR |
1591 | retcode = ERR_AUTH_ALG_ND; |
1592 | goto fail; | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | if (new_conf->integrity_alg[0]) { | |
1597 | integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1598 | if (IS_ERR(integrity_w_tfm)) { | |
1599 | integrity_w_tfm = NULL; | |
1600 | retcode=ERR_INTEGRITY_ALG; | |
1601 | goto fail; | |
1602 | } | |
1603 | ||
1604 | if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) { | |
1605 | retcode=ERR_INTEGRITY_ALG_ND; | |
1606 | goto fail; | |
1607 | } | |
1608 | ||
1609 | integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1610 | if (IS_ERR(integrity_r_tfm)) { | |
1611 | integrity_r_tfm = NULL; | |
1612 | retcode=ERR_INTEGRITY_ALG; | |
1613 | goto fail; | |
1614 | } | |
1615 | } | |
1616 | ||
b411b363 PR |
1617 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
1618 | ||
80883197 | 1619 | /* allocation not in the IO path, cqueue thread context */ |
b411b363 PR |
1620 | if (integrity_w_tfm) { |
1621 | i = crypto_hash_digestsize(integrity_w_tfm); | |
1622 | int_dig_out = kmalloc(i, GFP_KERNEL); | |
1623 | if (!int_dig_out) { | |
1624 | retcode = ERR_NOMEM; | |
1625 | goto fail; | |
1626 | } | |
1627 | int_dig_in = kmalloc(i, GFP_KERNEL); | |
1628 | if (!int_dig_in) { | |
1629 | retcode = ERR_NOMEM; | |
1630 | goto fail; | |
1631 | } | |
1632 | int_dig_vv = kmalloc(i, GFP_KERNEL); | |
1633 | if (!int_dig_vv) { | |
1634 | retcode = ERR_NOMEM; | |
1635 | goto fail; | |
1636 | } | |
1637 | } | |
1638 | ||
80883197 PR |
1639 | conn_flush_workqueue(tconn); |
1640 | spin_lock_irq(&tconn->req_lock); | |
1641 | if (tconn->net_conf != NULL) { | |
b411b363 | 1642 | retcode = ERR_NET_CONFIGURED; |
80883197 | 1643 | spin_unlock_irq(&tconn->req_lock); |
b411b363 PR |
1644 | goto fail; |
1645 | } | |
80883197 | 1646 | tconn->net_conf = new_conf; |
b411b363 | 1647 | |
80883197 PR |
1648 | crypto_free_hash(tconn->cram_hmac_tfm); |
1649 | tconn->cram_hmac_tfm = tfm; | |
b411b363 | 1650 | |
80883197 PR |
1651 | crypto_free_hash(tconn->integrity_w_tfm); |
1652 | tconn->integrity_w_tfm = integrity_w_tfm; | |
b411b363 | 1653 | |
80883197 PR |
1654 | crypto_free_hash(tconn->integrity_r_tfm); |
1655 | tconn->integrity_r_tfm = integrity_r_tfm; | |
b411b363 | 1656 | |
80883197 PR |
1657 | kfree(tconn->int_dig_out); |
1658 | kfree(tconn->int_dig_in); | |
1659 | kfree(tconn->int_dig_vv); | |
1660 | tconn->int_dig_out=int_dig_out; | |
1661 | tconn->int_dig_in=int_dig_in; | |
1662 | tconn->int_dig_vv=int_dig_vv; | |
1663 | retcode = _conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
1664 | spin_unlock_irq(&tconn->req_lock); | |
b411b363 | 1665 | |
80883197 PR |
1666 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1667 | mdev->send_cnt = 0; | |
1668 | mdev->recv_cnt = 0; | |
1669 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1670 | } | |
80883197 | 1671 | conn_reconfig_done(tconn); |
3b98c0c2 | 1672 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1673 | return 0; |
1674 | ||
1675 | fail: | |
1676 | kfree(int_dig_out); | |
1677 | kfree(int_dig_in); | |
1678 | kfree(int_dig_vv); | |
1679 | crypto_free_hash(tfm); | |
1680 | crypto_free_hash(integrity_w_tfm); | |
1681 | crypto_free_hash(integrity_r_tfm); | |
b411b363 PR |
1682 | kfree(new_conf); |
1683 | ||
80883197 | 1684 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
1685 | out: |
1686 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1687 | return 0; |
1688 | } | |
1689 | ||
85f75dd7 LE |
1690 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
1691 | { | |
1692 | enum drbd_state_rv rv; | |
1693 | if (force) { | |
1694 | spin_lock_irq(&tconn->req_lock); | |
1695 | if (tconn->cstate >= C_WF_CONNECTION) | |
1696 | _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
1697 | spin_unlock_irq(&tconn->req_lock); | |
1698 | return SS_SUCCESS; | |
1699 | } | |
1700 | ||
1701 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), 0); | |
1702 | ||
1703 | switch (rv) { | |
1704 | case SS_NOTHING_TO_DO: | |
1705 | case SS_ALREADY_STANDALONE: | |
1706 | return SS_SUCCESS; | |
1707 | case SS_PRIMARY_NOP: | |
1708 | /* Our state checking code wants to see the peer outdated. */ | |
1709 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
1710 | pdsk, D_OUTDATED), CS_VERBOSE); | |
1711 | break; | |
1712 | case SS_CW_FAILED_BY_PEER: | |
1713 | /* The peer probably wants to see us outdated. */ | |
1714 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
1715 | disk, D_OUTDATED), 0); | |
1716 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
1717 | conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
1718 | rv = SS_SUCCESS; | |
1719 | } | |
1720 | break; | |
1721 | default:; | |
1722 | /* no special handling necessary */ | |
1723 | } | |
1724 | ||
1725 | return rv; | |
1726 | } | |
1727 | ||
3b98c0c2 | 1728 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1729 | { |
3b98c0c2 LE |
1730 | struct disconnect_parms parms; |
1731 | struct drbd_tconn *tconn; | |
85f75dd7 | 1732 | enum drbd_state_rv rv; |
3b98c0c2 LE |
1733 | enum drbd_ret_code retcode; |
1734 | int err; | |
2561b9c1 | 1735 | |
3b98c0c2 LE |
1736 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1737 | if (!adm_ctx.reply_skb) | |
1738 | return retcode; | |
1739 | if (retcode != NO_ERROR) | |
2561b9c1 | 1740 | goto fail; |
3b98c0c2 LE |
1741 | |
1742 | tconn = adm_ctx.tconn; | |
1743 | memset(&parms, 0, sizeof(parms)); | |
1744 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
1745 | err = disconnect_parms_from_attrs(&parms, info->attrs); | |
1746 | if (err) { | |
1747 | retcode = ERR_MANDATORY_TAG; | |
1748 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1749 | goto fail; | |
1750 | } | |
2561b9c1 PR |
1751 | } |
1752 | ||
85f75dd7 LE |
1753 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
1754 | if (rv < SS_SUCCESS) | |
b411b363 PR |
1755 | goto fail; |
1756 | ||
df24aa45 PR |
1757 | if (wait_event_interruptible(tconn->ping_wait, |
1758 | tconn->cstate != C_DISCONNECTING)) { | |
b411b363 PR |
1759 | /* Do not test for mdev->state.conn == C_STANDALONE, since |
1760 | someone else might connect us in the mean time! */ | |
1761 | retcode = ERR_INTR; | |
1762 | goto fail; | |
1763 | } | |
1764 | ||
b411b363 PR |
1765 | retcode = NO_ERROR; |
1766 | fail: | |
3b98c0c2 | 1767 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1768 | return 0; |
1769 | } | |
1770 | ||
1771 | void resync_after_online_grow(struct drbd_conf *mdev) | |
1772 | { | |
1773 | int iass; /* I am sync source */ | |
1774 | ||
1775 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
1776 | if (mdev->state.role != mdev->state.peer) | |
1777 | iass = (mdev->state.role == R_PRIMARY); | |
1778 | else | |
25703f83 | 1779 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
1780 | |
1781 | if (iass) | |
1782 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
1783 | else | |
1784 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
1785 | } | |
1786 | ||
3b98c0c2 | 1787 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1788 | { |
3b98c0c2 LE |
1789 | struct resize_parms rs; |
1790 | struct drbd_conf *mdev; | |
1791 | enum drbd_ret_code retcode; | |
b411b363 | 1792 | enum determine_dev_size dd; |
6495d2c6 | 1793 | enum dds_flags ddsf; |
3b98c0c2 | 1794 | int err; |
b411b363 | 1795 | |
3b98c0c2 LE |
1796 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1797 | if (!adm_ctx.reply_skb) | |
1798 | return retcode; | |
1799 | if (retcode != NO_ERROR) | |
b411b363 | 1800 | goto fail; |
3b98c0c2 LE |
1801 | |
1802 | memset(&rs, 0, sizeof(struct resize_parms)); | |
1803 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
1804 | err = resize_parms_from_attrs(&rs, info->attrs); | |
1805 | if (err) { | |
1806 | retcode = ERR_MANDATORY_TAG; | |
1807 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1808 | goto fail; | |
1809 | } | |
b411b363 PR |
1810 | } |
1811 | ||
3b98c0c2 | 1812 | mdev = adm_ctx.mdev; |
b411b363 PR |
1813 | if (mdev->state.conn > C_CONNECTED) { |
1814 | retcode = ERR_RESIZE_RESYNC; | |
1815 | goto fail; | |
1816 | } | |
1817 | ||
1818 | if (mdev->state.role == R_SECONDARY && | |
1819 | mdev->state.peer == R_SECONDARY) { | |
1820 | retcode = ERR_NO_PRIMARY; | |
1821 | goto fail; | |
1822 | } | |
1823 | ||
1824 | if (!get_ldev(mdev)) { | |
1825 | retcode = ERR_NO_DISK; | |
1826 | goto fail; | |
1827 | } | |
1828 | ||
31890f4a | 1829 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
1830 | retcode = ERR_NEED_APV_93; |
1831 | goto fail; | |
1832 | } | |
1833 | ||
087c2492 | 1834 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 1835 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 PR |
1836 | |
1837 | mdev->ldev->dc.disk_size = (sector_t)rs.resize_size; | |
6495d2c6 | 1838 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 1839 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
1840 | drbd_md_sync(mdev); |
1841 | put_ldev(mdev); | |
1842 | if (dd == dev_size_error) { | |
1843 | retcode = ERR_NOMEM_BITMAP; | |
1844 | goto fail; | |
1845 | } | |
1846 | ||
087c2492 | 1847 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
1848 | if (dd == grew) |
1849 | set_bit(RESIZE_PENDING, &mdev->flags); | |
1850 | ||
1851 | drbd_send_uuids(mdev); | |
6495d2c6 | 1852 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
1853 | } |
1854 | ||
1855 | fail: | |
3b98c0c2 | 1856 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1857 | return 0; |
1858 | } | |
1859 | ||
3b98c0c2 | 1860 | int drbd_adm_syncer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1861 | { |
3b98c0c2 LE |
1862 | struct drbd_conf *mdev; |
1863 | enum drbd_ret_code retcode; | |
b411b363 PR |
1864 | int err; |
1865 | int ovr; /* online verify running */ | |
1866 | int rsr; /* re-sync running */ | |
1867 | struct crypto_hash *verify_tfm = NULL; | |
1868 | struct crypto_hash *csums_tfm = NULL; | |
1869 | struct syncer_conf sc; | |
1870 | cpumask_var_t new_cpu_mask; | |
778f271d PR |
1871 | int *rs_plan_s = NULL; |
1872 | int fifo_size; | |
b411b363 | 1873 | |
3b98c0c2 LE |
1874 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1875 | if (!adm_ctx.reply_skb) | |
1876 | return retcode; | |
1877 | if (retcode != NO_ERROR) | |
1878 | goto fail; | |
1879 | mdev = adm_ctx.mdev; | |
1880 | ||
b411b363 PR |
1881 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
1882 | retcode = ERR_NOMEM; | |
3b98c0c2 | 1883 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
1884 | goto fail; |
1885 | } | |
1886 | ||
3b98c0c2 LE |
1887 | if (((struct drbd_genlmsghdr*)info->userhdr)->flags |
1888 | & DRBD_GENL_F_SET_DEFAULTS) { | |
b411b363 PR |
1889 | memset(&sc, 0, sizeof(struct syncer_conf)); |
1890 | sc.rate = DRBD_RATE_DEF; | |
1891 | sc.after = DRBD_AFTER_DEF; | |
1892 | sc.al_extents = DRBD_AL_EXTENTS_DEF; | |
265be2d0 | 1893 | sc.on_no_data = DRBD_ON_NO_DATA_DEF; |
9a31d716 PR |
1894 | sc.c_plan_ahead = DRBD_C_PLAN_AHEAD_DEF; |
1895 | sc.c_delay_target = DRBD_C_DELAY_TARGET_DEF; | |
1896 | sc.c_fill_target = DRBD_C_FILL_TARGET_DEF; | |
0f0601f4 LE |
1897 | sc.c_max_rate = DRBD_C_MAX_RATE_DEF; |
1898 | sc.c_min_rate = DRBD_C_MIN_RATE_DEF; | |
b411b363 PR |
1899 | } else |
1900 | memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf)); | |
1901 | ||
3b98c0c2 LE |
1902 | err = syncer_conf_from_attrs(&sc, info->attrs); |
1903 | if (err) { | |
b411b363 | 1904 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1905 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1906 | goto fail; |
1907 | } | |
1908 | ||
1909 | /* re-sync running */ | |
1910 | rsr = ( mdev->state.conn == C_SYNC_SOURCE || | |
1911 | mdev->state.conn == C_SYNC_TARGET || | |
1912 | mdev->state.conn == C_PAUSED_SYNC_S || | |
1913 | mdev->state.conn == C_PAUSED_SYNC_T ); | |
1914 | ||
1915 | if (rsr && strcmp(sc.csums_alg, mdev->sync_conf.csums_alg)) { | |
1916 | retcode = ERR_CSUMS_RESYNC_RUNNING; | |
1917 | goto fail; | |
1918 | } | |
1919 | ||
1920 | if (!rsr && sc.csums_alg[0]) { | |
1921 | csums_tfm = crypto_alloc_hash(sc.csums_alg, 0, CRYPTO_ALG_ASYNC); | |
1922 | if (IS_ERR(csums_tfm)) { | |
1923 | csums_tfm = NULL; | |
1924 | retcode = ERR_CSUMS_ALG; | |
1925 | goto fail; | |
1926 | } | |
1927 | ||
1928 | if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) { | |
1929 | retcode = ERR_CSUMS_ALG_ND; | |
1930 | goto fail; | |
1931 | } | |
1932 | } | |
1933 | ||
1934 | /* online verify running */ | |
1935 | ovr = (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T); | |
1936 | ||
1937 | if (ovr) { | |
1938 | if (strcmp(sc.verify_alg, mdev->sync_conf.verify_alg)) { | |
1939 | retcode = ERR_VERIFY_RUNNING; | |
1940 | goto fail; | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | if (!ovr && sc.verify_alg[0]) { | |
1945 | verify_tfm = crypto_alloc_hash(sc.verify_alg, 0, CRYPTO_ALG_ASYNC); | |
1946 | if (IS_ERR(verify_tfm)) { | |
1947 | verify_tfm = NULL; | |
1948 | retcode = ERR_VERIFY_ALG; | |
1949 | goto fail; | |
1950 | } | |
1951 | ||
1952 | if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) { | |
1953 | retcode = ERR_VERIFY_ALG_ND; | |
1954 | goto fail; | |
1955 | } | |
1956 | } | |
1957 | ||
1958 | /* silently ignore cpu mask on UP kernel */ | |
1959 | if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) { | |
1960 | err = __bitmap_parse(sc.cpu_mask, 32, 0, | |
1961 | cpumask_bits(new_cpu_mask), nr_cpu_ids); | |
1962 | if (err) { | |
1963 | dev_warn(DEV, "__bitmap_parse() failed with %d\n", err); | |
1964 | retcode = ERR_CPU_MASK_PARSE; | |
1965 | goto fail; | |
1966 | } | |
1967 | } | |
1968 | ||
841ce241 AG |
1969 | if (!expect(sc.rate >= 1)) |
1970 | sc.rate = 1; | |
7ad651b5 LE |
1971 | |
1972 | /* clip to allowed range */ | |
1973 | if (!expect(sc.al_extents >= DRBD_AL_EXTENTS_MIN)) | |
1974 | sc.al_extents = DRBD_AL_EXTENTS_MIN; | |
1975 | if (!expect(sc.al_extents <= DRBD_AL_EXTENTS_MAX)) | |
1976 | sc.al_extents = DRBD_AL_EXTENTS_MAX; | |
b411b363 PR |
1977 | |
1978 | /* most sanity checks done, try to assign the new sync-after | |
1979 | * dependency. need to hold the global lock in there, | |
1980 | * to avoid a race in the dependency loop check. */ | |
1981 | retcode = drbd_alter_sa(mdev, sc.after); | |
1982 | if (retcode != NO_ERROR) | |
1983 | goto fail; | |
1984 | ||
778f271d PR |
1985 | fifo_size = (sc.c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
1986 | if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) { | |
1987 | rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL); | |
1988 | if (!rs_plan_s) { | |
1989 | dev_err(DEV, "kmalloc of fifo_buffer failed"); | |
1990 | retcode = ERR_NOMEM; | |
1991 | goto fail; | |
1992 | } | |
1993 | } | |
1994 | ||
b411b363 PR |
1995 | /* ok, assign the rest of it as well. |
1996 | * lock against receive_SyncParam() */ | |
1997 | spin_lock(&mdev->peer_seq_lock); | |
1998 | mdev->sync_conf = sc; | |
1999 | ||
2000 | if (!rsr) { | |
2001 | crypto_free_hash(mdev->csums_tfm); | |
2002 | mdev->csums_tfm = csums_tfm; | |
2003 | csums_tfm = NULL; | |
2004 | } | |
2005 | ||
2006 | if (!ovr) { | |
2007 | crypto_free_hash(mdev->verify_tfm); | |
2008 | mdev->verify_tfm = verify_tfm; | |
2009 | verify_tfm = NULL; | |
2010 | } | |
778f271d PR |
2011 | |
2012 | if (fifo_size != mdev->rs_plan_s.size) { | |
2013 | kfree(mdev->rs_plan_s.values); | |
2014 | mdev->rs_plan_s.values = rs_plan_s; | |
2015 | mdev->rs_plan_s.size = fifo_size; | |
2016 | mdev->rs_planed = 0; | |
2017 | rs_plan_s = NULL; | |
2018 | } | |
2019 | ||
b411b363 PR |
2020 | spin_unlock(&mdev->peer_seq_lock); |
2021 | ||
2022 | if (get_ldev(mdev)) { | |
2023 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
2024 | drbd_al_shrink(mdev); | |
2025 | err = drbd_check_al_size(mdev); | |
2026 | lc_unlock(mdev->act_log); | |
2027 | wake_up(&mdev->al_wait); | |
2028 | ||
2029 | put_ldev(mdev); | |
2030 | drbd_md_sync(mdev); | |
2031 | ||
2032 | if (err) { | |
2033 | retcode = ERR_NOMEM; | |
2034 | goto fail; | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | if (mdev->state.conn >= C_CONNECTED) | |
2039 | drbd_send_sync_param(mdev, &sc); | |
2040 | ||
80822284 PR |
2041 | if (!cpumask_equal(mdev->tconn->cpu_mask, new_cpu_mask)) { |
2042 | cpumask_copy(mdev->tconn->cpu_mask, new_cpu_mask); | |
2043 | drbd_calc_cpu_mask(mdev->tconn); | |
e6b3ea83 PR |
2044 | mdev->tconn->receiver.reset_cpu_mask = 1; |
2045 | mdev->tconn->asender.reset_cpu_mask = 1; | |
2046 | mdev->tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2047 | } |
2048 | ||
2049 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
2050 | fail: | |
778f271d | 2051 | kfree(rs_plan_s); |
b411b363 PR |
2052 | free_cpumask_var(new_cpu_mask); |
2053 | crypto_free_hash(csums_tfm); | |
2054 | crypto_free_hash(verify_tfm); | |
3b98c0c2 LE |
2055 | |
2056 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2057 | return 0; |
2058 | } | |
2059 | ||
3b98c0c2 | 2060 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2061 | { |
3b98c0c2 LE |
2062 | struct drbd_conf *mdev; |
2063 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2064 | ||
2065 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2066 | if (!adm_ctx.reply_skb) | |
2067 | return retcode; | |
2068 | if (retcode != NO_ERROR) | |
2069 | goto out; | |
2070 | ||
2071 | mdev = adm_ctx.mdev; | |
b411b363 | 2072 | |
194bfb32 LE |
2073 | /* If there is still bitmap IO pending, probably because of a previous |
2074 | * resync just being finished, wait for it before requesting a new resync. */ | |
2075 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2076 | ||
b411b363 PR |
2077 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2078 | ||
2079 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2080 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2081 | ||
2082 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2083 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2084 | if (mdev->state.conn < C_CONNECTED) |
2085 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2086 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2087 | |
2088 | if (retcode != SS_NEED_CONNECTION) | |
2089 | break; | |
2090 | ||
2091 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2092 | } | |
2093 | ||
3b98c0c2 LE |
2094 | out: |
2095 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2096 | return 0; |
2097 | } | |
2098 | ||
0778286a PR |
2099 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2100 | { | |
2101 | int rv; | |
2102 | ||
2103 | rv = drbd_bmio_set_n_write(mdev); | |
2104 | drbd_suspend_al(mdev); | |
2105 | return rv; | |
2106 | } | |
2107 | ||
3b98c0c2 LE |
2108 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2109 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2110 | { |
3b98c0c2 | 2111 | enum drbd_ret_code retcode; |
194bfb32 | 2112 | |
3b98c0c2 LE |
2113 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2114 | if (!adm_ctx.reply_skb) | |
2115 | return retcode; | |
2116 | if (retcode != NO_ERROR) | |
2117 | goto out; | |
b411b363 | 2118 | |
3b98c0c2 LE |
2119 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2120 | out: | |
2121 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2122 | return 0; |
2123 | } | |
2124 | ||
3b98c0c2 | 2125 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2126 | { |
3b98c0c2 LE |
2127 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2128 | } | |
b411b363 | 2129 | |
3b98c0c2 LE |
2130 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2131 | { | |
2132 | enum drbd_ret_code retcode; | |
2133 | ||
2134 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2135 | if (!adm_ctx.reply_skb) | |
2136 | return retcode; | |
2137 | if (retcode != NO_ERROR) | |
2138 | goto out; | |
b411b363 | 2139 | |
3b98c0c2 LE |
2140 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2141 | retcode = ERR_PAUSE_IS_SET; | |
2142 | out: | |
2143 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2144 | return 0; |
2145 | } | |
2146 | ||
3b98c0c2 | 2147 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2148 | { |
cd88d030 | 2149 | union drbd_state s; |
3b98c0c2 LE |
2150 | enum drbd_ret_code retcode; |
2151 | ||
2152 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2153 | if (!adm_ctx.reply_skb) | |
2154 | return retcode; | |
2155 | if (retcode != NO_ERROR) | |
2156 | goto out; | |
b411b363 | 2157 | |
3b98c0c2 LE |
2158 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2159 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2160 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2161 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2162 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2163 | } else { | |
2164 | retcode = ERR_PAUSE_IS_CLEAR; | |
2165 | } | |
2166 | } | |
b411b363 | 2167 | |
3b98c0c2 LE |
2168 | out: |
2169 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2170 | return 0; |
2171 | } | |
2172 | ||
3b98c0c2 | 2173 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2174 | { |
3b98c0c2 | 2175 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2176 | } |
2177 | ||
3b98c0c2 | 2178 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2179 | { |
3b98c0c2 LE |
2180 | struct drbd_conf *mdev; |
2181 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2182 | ||
2183 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2184 | if (!adm_ctx.reply_skb) | |
2185 | return retcode; | |
2186 | if (retcode != NO_ERROR) | |
2187 | goto out; | |
2188 | ||
2189 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2190 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2191 | drbd_uuid_new_current(mdev); | |
2192 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2193 | } |
265be2d0 | 2194 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2195 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2196 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2197 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2198 | tl_clear(mdev->tconn); |
265be2d0 | 2199 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2200 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2201 | } |
2202 | drbd_resume_io(mdev); | |
2203 | ||
3b98c0c2 LE |
2204 | out: |
2205 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2206 | return 0; |
2207 | } | |
2208 | ||
3b98c0c2 | 2209 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2210 | { |
3b98c0c2 | 2211 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2212 | } |
2213 | ||
543cc10b LE |
2214 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *conn_name, unsigned vnr) |
2215 | { | |
2216 | struct nlattr *nla; | |
2217 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2218 | if (!nla) | |
2219 | goto nla_put_failure; | |
2220 | if (vnr != VOLUME_UNSPECIFIED) | |
2221 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
2222 | NLA_PUT_STRING(skb, T_ctx_conn_name, conn_name); | |
2223 | nla_nest_end(skb, nla); | |
2224 | return 0; | |
2225 | ||
2226 | nla_put_failure: | |
2227 | if (nla) | |
2228 | nla_nest_cancel(skb, nla); | |
2229 | return -EMSGSIZE; | |
2230 | } | |
2231 | ||
3b98c0c2 LE |
2232 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2233 | const struct sib_info *sib) | |
b411b363 | 2234 | { |
3b98c0c2 LE |
2235 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
2236 | struct nlattr *nla; | |
2237 | int got_ldev; | |
2238 | int got_net; | |
2239 | int err = 0; | |
2240 | int exclude_sensitive; | |
2241 | ||
2242 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2243 | * to. So we better exclude_sensitive information. | |
2244 | * | |
2245 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2246 | * in the context of the requesting user process. Exclude sensitive | |
2247 | * information, unless current has superuser. | |
2248 | * | |
2249 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2250 | * relies on the current implementation of netlink_dump(), which | |
2251 | * executes the dump callback successively from netlink_recvmsg(), | |
2252 | * always in the context of the receiving process */ | |
2253 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2254 | ||
2255 | got_ldev = get_ldev(mdev); | |
2256 | got_net = get_net_conf(mdev->tconn); | |
2257 | ||
2258 | /* We need to add connection name and volume number information still. | |
2259 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2260 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2261 | goto nla_put_failure; |
3b98c0c2 LE |
2262 | |
2263 | if (got_ldev) | |
2264 | if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive)) | |
2265 | goto nla_put_failure; | |
2266 | if (got_net) | |
2267 | if (net_conf_to_skb(skb, mdev->tconn->net_conf, exclude_sensitive)) | |
2268 | goto nla_put_failure; | |
2269 | ||
2270 | if (syncer_conf_to_skb(skb, &mdev->sync_conf, exclude_sensitive)) | |
2271 | goto nla_put_failure; | |
2272 | ||
2273 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); | |
2274 | if (!nla) | |
2275 | goto nla_put_failure; | |
2276 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2277 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2278 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2279 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2280 | ||
2281 | if (got_ldev) { | |
2282 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2283 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2284 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2285 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2286 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2287 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2288 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2289 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2290 | } | |
b411b363 PR |
2291 | } |
2292 | ||
3b98c0c2 LE |
2293 | if (sib) { |
2294 | switch(sib->sib_reason) { | |
2295 | case SIB_SYNC_PROGRESS: | |
2296 | case SIB_GET_STATUS_REPLY: | |
2297 | break; | |
2298 | case SIB_STATE_CHANGE: | |
2299 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2300 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2301 | break; | |
2302 | case SIB_HELPER_POST: | |
2303 | NLA_PUT_U32(skb, | |
2304 | T_helper_exit_code, sib->helper_exit_code); | |
2305 | /* fall through */ | |
2306 | case SIB_HELPER_PRE: | |
2307 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2308 | break; | |
2309 | } | |
b411b363 | 2310 | } |
3b98c0c2 | 2311 | nla_nest_end(skb, nla); |
b411b363 | 2312 | |
3b98c0c2 LE |
2313 | if (0) |
2314 | nla_put_failure: | |
2315 | err = -EMSGSIZE; | |
2316 | if (got_ldev) | |
2317 | put_ldev(mdev); | |
2318 | if (got_net) | |
2319 | put_net_conf(mdev->tconn); | |
2320 | return err; | |
b411b363 PR |
2321 | } |
2322 | ||
3b98c0c2 | 2323 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2324 | { |
3b98c0c2 LE |
2325 | enum drbd_ret_code retcode; |
2326 | int err; | |
b411b363 | 2327 | |
3b98c0c2 LE |
2328 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2329 | if (!adm_ctx.reply_skb) | |
2330 | return retcode; | |
2331 | if (retcode != NO_ERROR) | |
2332 | goto out; | |
b411b363 | 2333 | |
3b98c0c2 LE |
2334 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2335 | if (err) { | |
2336 | nlmsg_free(adm_ctx.reply_skb); | |
2337 | return err; | |
b411b363 | 2338 | } |
3b98c0c2 LE |
2339 | out: |
2340 | drbd_adm_finish(info, retcode); | |
2341 | return 0; | |
b411b363 PR |
2342 | } |
2343 | ||
3b98c0c2 | 2344 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2345 | { |
3b98c0c2 LE |
2346 | struct drbd_conf *mdev; |
2347 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2348 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2349 | struct drbd_tconn *tconn = NULL; | |
2350 | struct drbd_tconn *tmp; | |
2351 | unsigned volume = cb->args[1]; | |
2352 | ||
2353 | /* Open coded, deferred, iteration: | |
2354 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2355 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2356 | * ... | |
2357 | * } | |
2358 | * } | |
2359 | * where tconn is cb->args[0]; | |
2360 | * and i is cb->args[1]; | |
2361 | * | |
3b98c0c2 LE |
2362 | * This may miss entries inserted after this dump started, |
2363 | * or entries deleted before they are reached. | |
543cc10b LE |
2364 | * |
2365 | * We need to make sure the mdev won't disappear while | |
2366 | * we are looking at it, and revalidate our iterators | |
2367 | * on each iteration. | |
2368 | */ | |
3b98c0c2 | 2369 | |
543cc10b LE |
2370 | /* synchronize with drbd_new_tconn/drbd_free_tconn */ |
2371 | mutex_lock(&drbd_cfg_mutex); | |
2372 | /* synchronize with drbd_delete_device */ | |
3b98c0c2 | 2373 | rcu_read_lock(); |
543cc10b LE |
2374 | next_tconn: |
2375 | /* revalidate iterator position */ | |
2376 | list_for_each_entry(tmp, &drbd_tconns, all_tconn) { | |
2377 | if (pos == NULL) { | |
2378 | /* first iteration */ | |
2379 | pos = tmp; | |
2380 | tconn = pos; | |
2381 | break; | |
2382 | } | |
2383 | if (tmp == pos) { | |
2384 | tconn = pos; | |
2385 | break; | |
2386 | } | |
2387 | } | |
2388 | if (tconn) { | |
2389 | mdev = idr_get_next(&tconn->volumes, &volume); | |
2390 | if (!mdev) { | |
2391 | /* No more volumes to dump on this tconn. | |
2392 | * Advance tconn iterator. */ | |
2393 | pos = list_entry(tconn->all_tconn.next, | |
2394 | struct drbd_tconn, all_tconn); | |
2395 | /* But, did we dump any volume on this tconn yet? */ | |
2396 | if (volume != 0) { | |
2397 | tconn = NULL; | |
2398 | volume = 0; | |
2399 | goto next_tconn; | |
2400 | } | |
2401 | } | |
2402 | ||
3b98c0c2 LE |
2403 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2404 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2405 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2406 | if (!dh) | |
543cc10b LE |
2407 | goto out; |
2408 | ||
2409 | if (!mdev) { | |
2410 | /* this is a tconn without a single volume */ | |
2411 | dh->minor = -1U; | |
2412 | dh->ret_code = NO_ERROR; | |
2413 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2414 | genlmsg_cancel(skb, dh); | |
2415 | else | |
2416 | genlmsg_end(skb, dh); | |
2417 | goto out; | |
2418 | } | |
3b98c0c2 | 2419 | |
543cc10b LE |
2420 | D_ASSERT(mdev->vnr == volume); |
2421 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2422 | |
543cc10b | 2423 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2424 | dh->ret_code = NO_ERROR; |
2425 | ||
2426 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2427 | genlmsg_cancel(skb, dh); | |
543cc10b | 2428 | goto out; |
3b98c0c2 LE |
2429 | } |
2430 | genlmsg_end(skb, dh); | |
2431 | } | |
b411b363 | 2432 | |
543cc10b | 2433 | out: |
3b98c0c2 | 2434 | rcu_read_unlock(); |
543cc10b LE |
2435 | mutex_unlock(&drbd_cfg_mutex); |
2436 | /* where to start the next iteration */ | |
2437 | cb->args[0] = (long)pos; | |
2438 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2439 | |
543cc10b LE |
2440 | /* No more tconns/volumes/minors found results in an empty skb. |
2441 | * Which will terminate the dump. */ | |
3b98c0c2 | 2442 | return skb->len; |
b411b363 PR |
2443 | } |
2444 | ||
3b98c0c2 | 2445 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2446 | { |
3b98c0c2 LE |
2447 | enum drbd_ret_code retcode; |
2448 | struct timeout_parms tp; | |
2449 | int err; | |
b411b363 | 2450 | |
3b98c0c2 LE |
2451 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2452 | if (!adm_ctx.reply_skb) | |
2453 | return retcode; | |
2454 | if (retcode != NO_ERROR) | |
2455 | goto out; | |
b411b363 | 2456 | |
3b98c0c2 LE |
2457 | tp.timeout_type = |
2458 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2459 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2460 | UT_DEFAULT; | |
b411b363 | 2461 | |
3b98c0c2 LE |
2462 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2463 | if (err) { | |
2464 | nlmsg_free(adm_ctx.reply_skb); | |
2465 | return err; | |
2466 | } | |
2467 | out: | |
2468 | drbd_adm_finish(info, retcode); | |
2469 | return 0; | |
b411b363 PR |
2470 | } |
2471 | ||
3b98c0c2 | 2472 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2473 | { |
3b98c0c2 LE |
2474 | struct drbd_conf *mdev; |
2475 | enum drbd_ret_code retcode; | |
b411b363 | 2476 | |
3b98c0c2 LE |
2477 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2478 | if (!adm_ctx.reply_skb) | |
2479 | return retcode; | |
2480 | if (retcode != NO_ERROR) | |
2481 | goto out; | |
873b0d5f | 2482 | |
3b98c0c2 LE |
2483 | mdev = adm_ctx.mdev; |
2484 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2485 | /* resume from last known position, if possible */ | |
2486 | struct start_ov_parms parms = | |
2487 | { .ov_start_sector = mdev->ov_start_sector }; | |
2488 | int err = start_ov_parms_from_attrs(&parms, info->attrs); | |
2489 | if (err) { | |
2490 | retcode = ERR_MANDATORY_TAG; | |
2491 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2492 | goto out; | |
2493 | } | |
2494 | /* w_make_ov_request expects position to be aligned */ | |
2495 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2496 | } | |
873b0d5f LE |
2497 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2498 | * just being finished, wait for it before requesting a new resync. */ | |
2499 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2500 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2501 | out: | |
2502 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2503 | return 0; |
2504 | } | |
2505 | ||
2506 | ||
3b98c0c2 | 2507 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2508 | { |
3b98c0c2 LE |
2509 | struct drbd_conf *mdev; |
2510 | enum drbd_ret_code retcode; | |
b411b363 PR |
2511 | int skip_initial_sync = 0; |
2512 | int err; | |
3b98c0c2 | 2513 | struct new_c_uuid_parms args; |
b411b363 | 2514 | |
3b98c0c2 LE |
2515 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2516 | if (!adm_ctx.reply_skb) | |
2517 | return retcode; | |
2518 | if (retcode != NO_ERROR) | |
2519 | goto out_nolock; | |
b411b363 | 2520 | |
3b98c0c2 LE |
2521 | mdev = adm_ctx.mdev; |
2522 | memset(&args, 0, sizeof(args)); | |
2523 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
2524 | err = new_c_uuid_parms_from_attrs(&args, info->attrs); | |
2525 | if (err) { | |
2526 | retcode = ERR_MANDATORY_TAG; | |
2527 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2528 | goto out_nolock; | |
2529 | } | |
b411b363 PR |
2530 | } |
2531 | ||
8410da8f | 2532 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2533 | |
2534 | if (!get_ldev(mdev)) { | |
2535 | retcode = ERR_NO_DISK; | |
2536 | goto out; | |
2537 | } | |
2538 | ||
2539 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2540 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2541 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2542 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2543 | skip_initial_sync = 1; | |
2544 | } else if (mdev->state.conn != C_STANDALONE) { | |
2545 | retcode = ERR_CONNECTED; | |
2546 | goto out_dec; | |
2547 | } | |
2548 | ||
2549 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2550 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2551 | ||
2552 | if (args.clear_bm) { | |
20ceb2b2 LE |
2553 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2554 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2555 | if (err) { |
2556 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2557 | retcode = ERR_IO_MD_DISK; | |
2558 | } | |
2559 | if (skip_initial_sync) { | |
2560 | drbd_send_uuids_skip_initial_sync(mdev); | |
2561 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2562 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2563 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2564 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2565 | CS_VERBOSE, NULL); | |
87eeee41 | 2566 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2567 | } |
2568 | } | |
2569 | ||
2570 | drbd_md_sync(mdev); | |
2571 | out_dec: | |
2572 | put_ldev(mdev); | |
2573 | out: | |
8410da8f | 2574 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2575 | out_nolock: |
2576 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2577 | return 0; |
2578 | } | |
2579 | ||
3b98c0c2 LE |
2580 | static enum drbd_ret_code |
2581 | drbd_check_conn_name(const char *name) | |
774b3055 | 2582 | { |
3b98c0c2 LE |
2583 | if (!name || !name[0]) { |
2584 | drbd_msg_put_info("connection name missing"); | |
2585 | return ERR_MANDATORY_TAG; | |
774b3055 | 2586 | } |
3b98c0c2 LE |
2587 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2588 | * we must not allow slashes */ | |
2589 | if (strchr(name, '/')) { | |
2590 | drbd_msg_put_info("invalid connection name"); | |
2591 | return ERR_INVALID_REQUEST; | |
774b3055 | 2592 | } |
3b98c0c2 | 2593 | return NO_ERROR; |
774b3055 PR |
2594 | } |
2595 | ||
3b98c0c2 | 2596 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2597 | { |
3b98c0c2 | 2598 | enum drbd_ret_code retcode; |
9f5180e5 | 2599 | |
3b98c0c2 LE |
2600 | retcode = drbd_adm_prepare(skb, info, 0); |
2601 | if (!adm_ctx.reply_skb) | |
2602 | return retcode; | |
2603 | if (retcode != NO_ERROR) | |
2604 | goto out; | |
b411b363 | 2605 | |
3b98c0c2 LE |
2606 | retcode = drbd_check_conn_name(adm_ctx.conn_name); |
2607 | if (retcode != NO_ERROR) | |
2608 | goto out; | |
b411b363 | 2609 | |
3b98c0c2 | 2610 | if (adm_ctx.tconn) { |
38f19616 LE |
2611 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2612 | retcode = ERR_INVALID_REQUEST; | |
2613 | drbd_msg_put_info("connection exists"); | |
2614 | } | |
2615 | /* else: still NO_ERROR */ | |
3b98c0c2 | 2616 | goto out; |
b411b363 PR |
2617 | } |
2618 | ||
3b98c0c2 | 2619 | if (!drbd_new_tconn(adm_ctx.conn_name)) |
b411b363 | 2620 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
2621 | out: |
2622 | drbd_adm_finish(info, retcode); | |
2623 | return 0; | |
b411b363 PR |
2624 | } |
2625 | ||
3b98c0c2 | 2626 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2627 | { |
3b98c0c2 LE |
2628 | struct drbd_genlmsghdr *dh = info->userhdr; |
2629 | enum drbd_ret_code retcode; | |
b411b363 | 2630 | |
3b98c0c2 LE |
2631 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2632 | if (!adm_ctx.reply_skb) | |
2633 | return retcode; | |
2634 | if (retcode != NO_ERROR) | |
2635 | goto out; | |
b411b363 | 2636 | |
3b98c0c2 LE |
2637 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
2638 | if (dh->minor >= minor_count) { | |
2639 | drbd_msg_put_info("requested minor out of range"); | |
2640 | retcode = ERR_INVALID_REQUEST; | |
2641 | goto out; | |
b411b363 | 2642 | } |
3b98c0c2 LE |
2643 | /* FIXME we need a define here */ |
2644 | if (adm_ctx.volume >= 256) { | |
2645 | drbd_msg_put_info("requested volume id out of range"); | |
2646 | retcode = ERR_INVALID_REQUEST; | |
2647 | goto out; | |
b411b363 | 2648 | } |
b411b363 | 2649 | |
38f19616 LE |
2650 | /* drbd_adm_prepare made sure already |
2651 | * that mdev->tconn and mdev->vnr match the request. */ | |
2652 | if (adm_ctx.mdev) { | |
2653 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
2654 | retcode = ERR_MINOR_EXISTS; | |
2655 | /* else: still NO_ERROR */ | |
2656 | goto out; | |
2657 | } | |
2658 | ||
3b98c0c2 LE |
2659 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
2660 | out: | |
2661 | drbd_adm_finish(info, retcode); | |
2662 | return 0; | |
b411b363 PR |
2663 | } |
2664 | ||
85f75dd7 LE |
2665 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
2666 | { | |
2667 | if (mdev->state.disk == D_DISKLESS && | |
2668 | /* no need to be mdev->state.conn == C_STANDALONE && | |
2669 | * we may want to delete a minor from a live replication group. | |
2670 | */ | |
2671 | mdev->state.role == R_SECONDARY) { | |
2672 | drbd_delete_device(mdev_to_minor(mdev)); | |
2673 | return NO_ERROR; | |
2674 | } else | |
2675 | return ERR_MINOR_CONFIGURED; | |
2676 | } | |
2677 | ||
3b98c0c2 | 2678 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2679 | { |
3b98c0c2 | 2680 | enum drbd_ret_code retcode; |
b411b363 | 2681 | |
3b98c0c2 LE |
2682 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2683 | if (!adm_ctx.reply_skb) | |
2684 | return retcode; | |
2685 | if (retcode != NO_ERROR) | |
2686 | goto out; | |
b411b363 | 2687 | |
85f75dd7 LE |
2688 | mutex_lock(&drbd_cfg_mutex); |
2689 | retcode = adm_delete_minor(adm_ctx.mdev); | |
2690 | mutex_unlock(&drbd_cfg_mutex); | |
2691 | /* if this was the last volume of this connection, | |
2692 | * this will terminate all threads */ | |
2693 | if (retcode == NO_ERROR) | |
cffec5b2 | 2694 | conn_reconfig_done(adm_ctx.tconn); |
85f75dd7 LE |
2695 | out: |
2696 | drbd_adm_finish(info, retcode); | |
2697 | return 0; | |
2698 | } | |
2699 | ||
2700 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
2701 | { | |
2702 | enum drbd_ret_code retcode; | |
2703 | enum drbd_state_rv rv; | |
2704 | struct drbd_conf *mdev; | |
2705 | unsigned i; | |
2706 | ||
2707 | retcode = drbd_adm_prepare(skb, info, 0); | |
2708 | if (!adm_ctx.reply_skb) | |
2709 | return retcode; | |
2710 | if (retcode != NO_ERROR) | |
2711 | goto out; | |
2712 | ||
2713 | if (!adm_ctx.tconn) { | |
2714 | retcode = ERR_CONN_NOT_KNOWN; | |
2715 | goto out; | |
2716 | } | |
2717 | ||
2718 | mutex_lock(&drbd_cfg_mutex); | |
2719 | /* demote */ | |
2720 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2721 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
2722 | if (retcode < SS_SUCCESS) { | |
2723 | drbd_msg_put_info("failed to demote"); | |
2724 | goto out_unlock; | |
2725 | } | |
2726 | } | |
2727 | ||
2728 | /* disconnect */ | |
2729 | rv = conn_try_disconnect(adm_ctx.tconn, 0); | |
2730 | if (rv < SS_SUCCESS) { | |
2731 | retcode = rv; /* enum type mismatch! */ | |
2732 | drbd_msg_put_info("failed to disconnect"); | |
2733 | goto out_unlock; | |
2734 | } | |
2735 | ||
2736 | /* detach */ | |
2737 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2738 | rv = adm_detach(mdev); | |
2739 | if (rv < SS_SUCCESS) { | |
2740 | retcode = rv; /* enum type mismatch! */ | |
2741 | drbd_msg_put_info("failed to detach"); | |
2742 | goto out_unlock; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | /* delete volumes */ | |
2747 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2748 | retcode = adm_delete_minor(mdev); | |
2749 | if (retcode != NO_ERROR) { | |
2750 | /* "can not happen" */ | |
2751 | drbd_msg_put_info("failed to delete volume"); | |
2752 | goto out_unlock; | |
2753 | } | |
2754 | } | |
2755 | ||
2756 | /* stop all threads */ | |
2757 | conn_reconfig_done(adm_ctx.tconn); | |
2758 | ||
2759 | /* delete connection */ | |
2760 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
2761 | drbd_free_tconn(adm_ctx.tconn); | |
2762 | retcode = NO_ERROR; | |
2763 | } else { | |
2764 | /* "can not happen" */ | |
2765 | retcode = ERR_CONN_IN_USE; | |
2766 | drbd_msg_put_info("failed to delete connection"); | |
2767 | goto out_unlock; | |
2768 | } | |
2769 | out_unlock: | |
2770 | mutex_unlock(&drbd_cfg_mutex); | |
3b98c0c2 LE |
2771 | out: |
2772 | drbd_adm_finish(info, retcode); | |
2773 | return 0; | |
b411b363 PR |
2774 | } |
2775 | ||
3b98c0c2 | 2776 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2777 | { |
3b98c0c2 | 2778 | enum drbd_ret_code retcode; |
b411b363 | 2779 | |
3b98c0c2 LE |
2780 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2781 | if (!adm_ctx.reply_skb) | |
2782 | return retcode; | |
2783 | if (retcode != NO_ERROR) | |
2784 | goto out; | |
2785 | ||
85f75dd7 | 2786 | mutex_lock(&drbd_cfg_mutex); |
3b98c0c2 LE |
2787 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { |
2788 | drbd_free_tconn(adm_ctx.tconn); | |
2789 | retcode = NO_ERROR; | |
2790 | } else { | |
2791 | retcode = ERR_CONN_IN_USE; | |
b411b363 | 2792 | } |
85f75dd7 | 2793 | mutex_unlock(&drbd_cfg_mutex); |
b411b363 | 2794 | |
3b98c0c2 LE |
2795 | out: |
2796 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2797 | return 0; |
2798 | } | |
2799 | ||
3b98c0c2 | 2800 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 2801 | { |
3b98c0c2 LE |
2802 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
2803 | struct sk_buff *msg; | |
2804 | struct drbd_genlmsghdr *d_out; | |
2805 | unsigned seq; | |
2806 | int err = -ENOMEM; | |
2807 | ||
2808 | seq = atomic_inc_return(&drbd_genl_seq); | |
2809 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
2810 | if (!msg) | |
2811 | goto failed; | |
2812 | ||
2813 | err = -EMSGSIZE; | |
2814 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
2815 | if (!d_out) /* cannot happen, but anyways. */ | |
2816 | goto nla_put_failure; | |
2817 | d_out->minor = mdev_to_minor(mdev); | |
2818 | d_out->ret_code = 0; | |
2819 | ||
2820 | if (nla_put_status_info(msg, mdev, sib)) | |
2821 | goto nla_put_failure; | |
2822 | genlmsg_end(msg, d_out); | |
2823 | err = drbd_genl_multicast_events(msg, 0); | |
2824 | /* msg has been consumed or freed in netlink_broadcast() */ | |
2825 | if (err && err != -ESRCH) | |
2826 | goto failed; | |
b411b363 | 2827 | |
3b98c0c2 | 2828 | return; |
b411b363 | 2829 | |
3b98c0c2 LE |
2830 | nla_put_failure: |
2831 | nlmsg_free(msg); | |
2832 | failed: | |
2833 | dev_err(DEV, "Error %d while broadcasting event. " | |
2834 | "Event seq:%u sib_reason:%u\n", | |
2835 | err, seq, sib->sib_reason); | |
b411b363 | 2836 | } |