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