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Commit | Line | Data |
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b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
265be2d0 | 35 | #include "drbd_req.h" |
b411b363 PR |
36 | #include "drbd_wrappers.h" |
37 | #include <asm/unaligned.h> | |
b411b363 | 38 | #include <linux/drbd_limits.h> |
87f7be4c | 39 | #include <linux/kthread.h> |
b411b363 | 40 | |
3b98c0c2 LE |
41 | #include <net/genetlink.h> |
42 | ||
43 | /* .doit */ | |
44 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
45 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
46 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
50 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info); | |
51 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 52 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
53 | |
54 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 56 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
57 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); |
58 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 59 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
60 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); |
61 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
62 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
63 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
64 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
65 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
66 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
67 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
68 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
69 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
70 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 71 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
72 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); |
73 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
74 | /* .dumpit */ | |
75 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
76 | ||
77 | #include <linux/drbd_genl_api.h> | |
78 | #include <linux/genl_magic_func.h> | |
79 | ||
80 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
81 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
82 | ||
3b98c0c2 LE |
83 | /* Configuration is strictly serialized, because generic netlink message |
84 | * processing is strictly serialized by the genl_lock(). | |
85 | * Which means we can use one static global drbd_config_context struct. | |
86 | */ | |
87 | static struct drbd_config_context { | |
88 | /* assigned from drbd_genlmsghdr */ | |
89 | unsigned int minor; | |
90 | /* assigned from request attributes, if present */ | |
91 | unsigned int volume; | |
92 | #define VOLUME_UNSPECIFIED (-1U) | |
93 | /* pointer into the request skb, | |
94 | * limited lifetime! */ | |
95 | char *conn_name; | |
96 | ||
97 | /* reply buffer */ | |
98 | struct sk_buff *reply_skb; | |
99 | /* pointer into reply buffer */ | |
100 | struct drbd_genlmsghdr *reply_dh; | |
101 | /* resolved from attributes, if possible */ | |
102 | struct drbd_conf *mdev; | |
103 | struct drbd_tconn *tconn; | |
104 | } adm_ctx; | |
105 | ||
106 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
107 | { | |
108 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
109 | if (genlmsg_reply(skb, info)) | |
110 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 111 | } |
3b98c0c2 LE |
112 | |
113 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
114 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 115 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
116 | { |
117 | struct sk_buff *skb = adm_ctx.reply_skb; | |
118 | struct nlattr *nla; | |
119 | int err = -EMSGSIZE; | |
120 | ||
121 | if (!info || !info[0]) | |
122 | return 0; | |
123 | ||
124 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
125 | if (!nla) | |
126 | return err; | |
127 | ||
128 | err = nla_put_string(skb, T_info_text, info); | |
129 | if (err) { | |
130 | nla_nest_cancel(skb, nla); | |
131 | return err; | |
132 | } else | |
133 | nla_nest_end(skb, nla); | |
134 | return 0; | |
b411b363 PR |
135 | } |
136 | ||
3b98c0c2 LE |
137 | /* This would be a good candidate for a "pre_doit" hook, |
138 | * and per-family private info->pointers. | |
139 | * But we need to stay compatible with older kernels. | |
140 | * If it returns successfully, adm_ctx members are valid. | |
141 | */ | |
142 | #define DRBD_ADM_NEED_MINOR 1 | |
143 | #define DRBD_ADM_NEED_CONN 2 | |
144 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, | |
145 | unsigned flags) | |
146 | { | |
147 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
148 | const u8 cmd = info->genlhdr->cmd; | |
149 | int err; | |
150 | ||
151 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
152 | ||
153 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
154 | if (cmd != DRBD_ADM_GET_STATUS | |
155 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
156 | return -EPERM; | |
157 | ||
158 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
159 | if (!adm_ctx.reply_skb) | |
160 | goto fail; | |
161 | ||
162 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
163 | info, &drbd_genl_family, 0, cmd); | |
164 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
165 | * but anyways */ | |
166 | if (!adm_ctx.reply_dh) | |
167 | goto fail; | |
168 | ||
169 | adm_ctx.reply_dh->minor = d_in->minor; | |
170 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
171 | ||
172 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { | |
173 | struct nlattr *nla; | |
174 | /* parse and validate only */ | |
f399002e | 175 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
176 | if (err) |
177 | goto fail; | |
178 | ||
179 | /* It was present, and valid, | |
180 | * copy it over to the reply skb. */ | |
181 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
182 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
183 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
184 | if (err) | |
185 | goto fail; | |
186 | ||
187 | /* and assign stuff to the global adm_ctx */ | |
188 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
189 | adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; | |
190 | nla = nested_attr_tb[__nla_type(T_ctx_conn_name)]; | |
191 | if (nla) | |
192 | adm_ctx.conn_name = nla_data(nla); | |
193 | } else | |
194 | adm_ctx.volume = VOLUME_UNSPECIFIED; | |
195 | ||
196 | adm_ctx.minor = d_in->minor; | |
197 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
0ace9dfa | 198 | adm_ctx.tconn = conn_get_by_name(adm_ctx.conn_name); |
3b98c0c2 LE |
199 | |
200 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
201 | drbd_msg_put_info("unknown minor"); | |
202 | return ERR_MINOR_INVALID; | |
203 | } | |
204 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { | |
205 | drbd_msg_put_info("unknown connection"); | |
206 | return ERR_INVALID_REQUEST; | |
207 | } | |
208 | ||
209 | /* some more paranoia, if the request was over-determined */ | |
527f4b24 LE |
210 | if (adm_ctx.mdev && adm_ctx.tconn && |
211 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
212 | pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", | |
213 | adm_ctx.minor, adm_ctx.conn_name, adm_ctx.mdev->tconn->name); | |
214 | drbd_msg_put_info("minor exists in different connection"); | |
215 | return ERR_INVALID_REQUEST; | |
216 | } | |
3b98c0c2 LE |
217 | if (adm_ctx.mdev && |
218 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
219 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
220 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
221 | adm_ctx.minor, adm_ctx.volume, | |
222 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 223 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
224 | return ERR_INVALID_REQUEST; |
225 | } | |
0ace9dfa | 226 | |
3b98c0c2 LE |
227 | return NO_ERROR; |
228 | ||
229 | fail: | |
230 | nlmsg_free(adm_ctx.reply_skb); | |
231 | adm_ctx.reply_skb = NULL; | |
232 | return -ENOMEM; | |
233 | } | |
234 | ||
235 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
236 | { | |
237 | struct nlattr *nla; | |
238 | const char *conn_name = NULL; | |
239 | ||
0ace9dfa PR |
240 | if (adm_ctx.tconn) { |
241 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
242 | adm_ctx.tconn = NULL; | |
243 | } | |
244 | ||
3b98c0c2 LE |
245 | if (!adm_ctx.reply_skb) |
246 | return -ENOMEM; | |
247 | ||
248 | adm_ctx.reply_dh->ret_code = retcode; | |
249 | ||
250 | nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; | |
251 | if (nla) { | |
252 | nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); | |
253 | if (nla) | |
254 | conn_name = nla_data(nla); | |
255 | } | |
256 | ||
257 | drbd_adm_send_reply(adm_ctx.reply_skb, info); | |
258 | return 0; | |
259 | } | |
b411b363 | 260 | |
6b75dced | 261 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 262 | { |
6b75dced | 263 | char *afs; |
44ed167d | 264 | struct net_conf *nc; |
b411b363 | 265 | |
44ed167d PR |
266 | rcu_read_lock(); |
267 | nc = rcu_dereference(tconn->net_conf); | |
268 | if (nc) { | |
269 | switch (((struct sockaddr *)nc->peer_addr)->sa_family) { | |
b411b363 PR |
270 | case AF_INET6: |
271 | afs = "ipv6"; | |
6b75dced | 272 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
44ed167d | 273 | &((struct sockaddr_in6 *)nc->peer_addr)->sin6_addr); |
b411b363 PR |
274 | break; |
275 | case AF_INET: | |
276 | afs = "ipv4"; | |
6b75dced | 277 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 278 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 PR |
279 | break; |
280 | default: | |
281 | afs = "ssocks"; | |
6b75dced | 282 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 283 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 | 284 | } |
6b75dced | 285 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
b411b363 | 286 | } |
44ed167d | 287 | rcu_read_unlock(); |
6b75dced PR |
288 | } |
289 | ||
290 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
291 | { | |
292 | char *envp[] = { "HOME=/", | |
293 | "TERM=linux", | |
294 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
295 | (char[20]) { }, /* address family */ | |
296 | (char[60]) { }, /* address */ | |
297 | NULL }; | |
298 | char mb[12]; | |
299 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
300 | struct sib_info sib; | |
301 | int ret; | |
302 | ||
303 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
304 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 305 | |
1090c056 LE |
306 | /* The helper may take some time. |
307 | * write out any unsynced meta data changes now */ | |
308 | drbd_md_sync(mdev); | |
309 | ||
b411b363 | 310 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
311 | sib.sib_reason = SIB_HELPER_PRE; |
312 | sib.helper_name = cmd; | |
313 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
314 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
315 | if (ret) | |
316 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
317 | usermode_helper, cmd, mb, | |
318 | (ret >> 8) & 0xff, ret); | |
319 | else | |
320 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
321 | usermode_helper, cmd, mb, | |
322 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
323 | sib.sib_reason = SIB_HELPER_POST; |
324 | sib.helper_exit_code = ret; | |
325 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
326 | |
327 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
328 | ret = 0; | |
329 | ||
330 | return ret; | |
331 | } | |
332 | ||
6b75dced PR |
333 | static void conn_md_sync(struct drbd_tconn *tconn) |
334 | { | |
335 | struct drbd_conf *mdev; | |
e90285e0 | 336 | int vnr; |
6b75dced | 337 | |
d3fcb490 | 338 | down_read(&drbd_cfg_rwsem); |
e90285e0 | 339 | idr_for_each_entry(&tconn->volumes, mdev, vnr) |
6b75dced | 340 | drbd_md_sync(mdev); |
d3fcb490 | 341 | up_read(&drbd_cfg_rwsem); |
6b75dced PR |
342 | } |
343 | ||
344 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
345 | { | |
346 | char *envp[] = { "HOME=/", | |
347 | "TERM=linux", | |
348 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
349 | (char[20]) { }, /* address family */ | |
350 | (char[60]) { }, /* address */ | |
351 | NULL }; | |
352 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
353 | int ret; | |
354 | ||
355 | setup_khelper_env(tconn, envp); | |
356 | conn_md_sync(tconn); | |
357 | ||
358 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
359 | /* TODO: conn_bcast_event() ?? */ | |
360 | ||
361 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
362 | if (ret) | |
363 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
364 | usermode_helper, cmd, tconn->name, | |
365 | (ret >> 8) & 0xff, ret); | |
366 | else | |
367 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
368 | usermode_helper, cmd, tconn->name, | |
369 | (ret >> 8) & 0xff, ret); | |
370 | /* TODO: conn_bcast_event() ?? */ | |
371 | ||
372 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
373 | ret = 0; | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
cb703454 | 378 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 379 | { |
cb703454 PR |
380 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
381 | struct drbd_conf *mdev; | |
382 | int vnr; | |
383 | ||
695d08fa | 384 | rcu_read_lock(); |
cb703454 PR |
385 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
386 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
387 | fp = max_t(enum drbd_fencing_p, fp, mdev->ldev->dc.fencing); | |
388 | put_ldev(mdev); | |
389 | } | |
390 | } | |
695d08fa | 391 | rcu_read_unlock(); |
cb703454 PR |
392 | |
393 | return fp; | |
394 | } | |
395 | ||
396 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
397 | { | |
398 | union drbd_state mask = { }; | |
399 | union drbd_state val = { }; | |
400 | enum drbd_fencing_p fp; | |
b411b363 PR |
401 | char *ex_to_string; |
402 | int r; | |
b411b363 | 403 | |
cb703454 PR |
404 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
405 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
406 | return false; | |
407 | } | |
b411b363 | 408 | |
cb703454 PR |
409 | fp = highest_fencing_policy(tconn); |
410 | switch (fp) { | |
411 | case FP_NOT_AVAIL: | |
412 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 413 | goto out; |
cb703454 PR |
414 | case FP_DONT_CARE: |
415 | return true; | |
416 | default: ; | |
b411b363 PR |
417 | } |
418 | ||
cb703454 | 419 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
420 | |
421 | switch ((r>>8) & 0xff) { | |
422 | case 3: /* peer is inconsistent */ | |
423 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
424 | mask.pdsk = D_MASK; |
425 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
426 | break; |
427 | case 4: /* peer got outdated, or was already outdated */ | |
428 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
429 | mask.pdsk = D_MASK; |
430 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
431 | break; |
432 | case 5: /* peer was down */ | |
cb703454 | 433 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
434 | /* we will(have) create(d) a new UUID anyways... */ |
435 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
436 | mask.pdsk = D_MASK; |
437 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
438 | } else { |
439 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
440 | } |
441 | break; | |
442 | case 6: /* Peer is primary, voluntarily outdate myself. | |
443 | * This is useful when an unconnected R_SECONDARY is asked to | |
444 | * become R_PRIMARY, but finds the other peer being active. */ | |
445 | ex_to_string = "peer is active"; | |
cb703454 PR |
446 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
447 | mask.disk = D_MASK; | |
448 | val.disk = D_OUTDATED; | |
b411b363 PR |
449 | break; |
450 | case 7: | |
451 | if (fp != FP_STONITH) | |
cb703454 | 452 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 453 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
454 | mask.pdsk = D_MASK; |
455 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
456 | break; |
457 | default: | |
458 | /* The script is broken ... */ | |
cb703454 PR |
459 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
460 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
461 | } |
462 | ||
cb703454 PR |
463 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
464 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 465 | |
cb703454 | 466 | out: |
fb22c402 | 467 | |
cb703454 PR |
468 | /* Not using |
469 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
470 | here, because we might were able to re-establish the connection in the | |
471 | meantime. */ | |
472 | spin_lock_irq(&tconn->req_lock); | |
473 | if (tconn->cstate < C_WF_REPORT_PARAMS) | |
474 | _conn_request_state(tconn, mask, val, CS_VERBOSE); | |
475 | spin_unlock_irq(&tconn->req_lock); | |
476 | ||
477 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
478 | } |
479 | ||
87f7be4c PR |
480 | static int _try_outdate_peer_async(void *data) |
481 | { | |
cb703454 | 482 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 483 | |
cb703454 | 484 | conn_try_outdate_peer(tconn); |
87f7be4c | 485 | |
9dc9fbb3 | 486 | kref_put(&tconn->kref, &conn_destroy); |
87f7be4c PR |
487 | return 0; |
488 | } | |
489 | ||
cb703454 | 490 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
491 | { |
492 | struct task_struct *opa; | |
493 | ||
9dc9fbb3 | 494 | kref_get(&tconn->kref); |
cb703454 | 495 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
9dc9fbb3 | 496 | if (IS_ERR(opa)) { |
cb703454 | 497 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
9dc9fbb3 PR |
498 | kref_put(&tconn->kref, &conn_destroy); |
499 | } | |
87f7be4c | 500 | } |
b411b363 | 501 | |
bf885f8a AG |
502 | enum drbd_state_rv |
503 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
504 | { |
505 | const int max_tries = 4; | |
bf885f8a | 506 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 507 | struct net_conf *nc; |
b411b363 PR |
508 | int try = 0; |
509 | int forced = 0; | |
510 | union drbd_state mask, val; | |
b411b363 PR |
511 | |
512 | if (new_role == R_PRIMARY) | |
0625ac19 | 513 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 514 | |
8410da8f | 515 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
516 | |
517 | mask.i = 0; mask.role = R_MASK; | |
518 | val.i = 0; val.role = new_role; | |
519 | ||
520 | while (try++ < max_tries) { | |
bf885f8a | 521 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
522 | |
523 | /* in case we first succeeded to outdate, | |
524 | * but now suddenly could establish a connection */ | |
bf885f8a | 525 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
526 | val.pdsk = 0; |
527 | mask.pdsk = 0; | |
528 | continue; | |
529 | } | |
530 | ||
bf885f8a | 531 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
532 | (mdev->state.disk < D_UP_TO_DATE && |
533 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
534 | mask.disk = D_MASK; |
535 | val.disk = D_UP_TO_DATE; | |
536 | forced = 1; | |
537 | continue; | |
538 | } | |
539 | ||
bf885f8a | 540 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
541 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
542 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 543 | |
cb703454 | 544 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
545 | val.disk = D_UP_TO_DATE; |
546 | mask.disk = D_MASK; | |
547 | } | |
b411b363 PR |
548 | continue; |
549 | } | |
550 | ||
bf885f8a | 551 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 552 | goto out; |
bf885f8a | 553 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 554 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 555 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
556 | mask.pdsk = D_MASK; |
557 | val.pdsk = D_OUTDATED; | |
b411b363 | 558 | |
cb703454 | 559 | } |
b411b363 PR |
560 | continue; |
561 | } | |
bf885f8a | 562 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
563 | /* Maybe the peer is detected as dead very soon... |
564 | retry at most once more in this case. */ | |
44ed167d PR |
565 | int timeo; |
566 | rcu_read_lock(); | |
567 | nc = rcu_dereference(mdev->tconn->net_conf); | |
568 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
569 | rcu_read_unlock(); | |
570 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
571 | if (try < max_tries) |
572 | try = max_tries - 1; | |
573 | continue; | |
574 | } | |
bf885f8a AG |
575 | if (rv < SS_SUCCESS) { |
576 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 577 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 578 | if (rv < SS_SUCCESS) |
3b98c0c2 | 579 | goto out; |
b411b363 PR |
580 | } |
581 | break; | |
582 | } | |
583 | ||
bf885f8a | 584 | if (rv < SS_SUCCESS) |
3b98c0c2 | 585 | goto out; |
b411b363 PR |
586 | |
587 | if (forced) | |
588 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
589 | ||
590 | /* Wait until nothing is on the fly :) */ | |
591 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
592 | ||
593 | if (new_role == R_SECONDARY) { | |
81e84650 | 594 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
595 | if (get_ldev(mdev)) { |
596 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
597 | put_ldev(mdev); | |
598 | } | |
599 | } else { | |
91fd4dad PR |
600 | mutex_lock(&mdev->tconn->net_conf_update); |
601 | nc = mdev->tconn->net_conf; | |
44ed167d | 602 | if (nc) |
91fd4dad PR |
603 | nc->want_lose = 0; /* without copy; single bit op is atomic */ |
604 | mutex_unlock(&mdev->tconn->net_conf_update); | |
605 | ||
81e84650 | 606 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
607 | if (get_ldev(mdev)) { |
608 | if (((mdev->state.conn < C_CONNECTED || | |
609 | mdev->state.pdsk <= D_FAILED) | |
610 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
611 | drbd_uuid_new_current(mdev); | |
612 | ||
613 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
614 | put_ldev(mdev); | |
615 | } | |
616 | } | |
617 | ||
19f843aa LE |
618 | /* writeout of activity log covered areas of the bitmap |
619 | * to stable storage done in after state change already */ | |
b411b363 PR |
620 | |
621 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
622 | /* if this was forced, we should consider sync */ | |
623 | if (forced) | |
624 | drbd_send_uuids(mdev); | |
625 | drbd_send_state(mdev); | |
626 | } | |
627 | ||
628 | drbd_md_sync(mdev); | |
629 | ||
630 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 631 | out: |
8410da8f | 632 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 633 | return rv; |
b411b363 PR |
634 | } |
635 | ||
3b98c0c2 | 636 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 637 | { |
3b98c0c2 LE |
638 | return err == -ENOMSG ? "required attribute missing" : |
639 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 640 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 641 | "invalid attribute value"; |
b411b363 PR |
642 | } |
643 | ||
3b98c0c2 | 644 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 645 | { |
3b98c0c2 LE |
646 | struct set_role_parms parms; |
647 | int err; | |
648 | enum drbd_ret_code retcode; | |
b411b363 | 649 | |
3b98c0c2 LE |
650 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
651 | if (!adm_ctx.reply_skb) | |
652 | return retcode; | |
653 | if (retcode != NO_ERROR) | |
654 | goto out; | |
655 | ||
656 | memset(&parms, 0, sizeof(parms)); | |
657 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 658 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
659 | if (err) { |
660 | retcode = ERR_MANDATORY_TAG; | |
661 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
662 | goto out; | |
663 | } | |
664 | } | |
665 | ||
666 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
667 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
668 | else | |
669 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
670 | out: | |
671 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
672 | return 0; |
673 | } | |
674 | ||
675 | /* initializes the md.*_offset members, so we are able to find | |
676 | * the on disk meta data */ | |
677 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
678 | struct drbd_backing_dev *bdev) | |
679 | { | |
680 | sector_t md_size_sect = 0; | |
681 | switch (bdev->dc.meta_dev_idx) { | |
682 | default: | |
683 | /* v07 style fixed size indexed meta data */ | |
684 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
685 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
686 | bdev->md.al_offset = MD_AL_OFFSET; | |
687 | bdev->md.bm_offset = MD_BM_OFFSET; | |
688 | break; | |
689 | case DRBD_MD_INDEX_FLEX_EXT: | |
690 | /* just occupy the full device; unit: sectors */ | |
691 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
692 | bdev->md.md_offset = 0; | |
693 | bdev->md.al_offset = MD_AL_OFFSET; | |
694 | bdev->md.bm_offset = MD_BM_OFFSET; | |
695 | break; | |
696 | case DRBD_MD_INDEX_INTERNAL: | |
697 | case DRBD_MD_INDEX_FLEX_INT: | |
698 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
699 | /* al size is still fixed */ | |
7ad651b5 | 700 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
701 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
702 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
703 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
704 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
705 | md_size_sect = ALIGN(md_size_sect, 8); | |
706 | ||
707 | /* plus the "drbd meta data super block", | |
708 | * and the activity log; */ | |
709 | md_size_sect += MD_BM_OFFSET; | |
710 | ||
711 | bdev->md.md_size_sect = md_size_sect; | |
712 | /* bitmap offset is adjusted by 'super' block size */ | |
713 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
714 | break; | |
715 | } | |
716 | } | |
717 | ||
4b0715f0 | 718 | /* input size is expected to be in KB */ |
b411b363 PR |
719 | char *ppsize(char *buf, unsigned long long size) |
720 | { | |
4b0715f0 LE |
721 | /* Needs 9 bytes at max including trailing NUL: |
722 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
723 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
724 | int base = 0; | |
4b0715f0 | 725 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
726 | /* shift + round */ |
727 | size = (size >> 10) + !!(size & (1<<9)); | |
728 | base++; | |
729 | } | |
4b0715f0 | 730 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
731 | |
732 | return buf; | |
733 | } | |
734 | ||
735 | /* there is still a theoretical deadlock when called from receiver | |
736 | * on an D_INCONSISTENT R_PRIMARY: | |
737 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
738 | * packet from remote to dec_ap_bio again. | |
739 | * receiver receive_sizes(), comes here, | |
740 | * waits for ap_bio_cnt == 0. -> deadlock. | |
741 | * but this cannot happen, actually, because: | |
742 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
743 | * (not connected, or bad/no disk on peer): | |
744 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
745 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
746 | * peer may not initiate a resize. | |
747 | */ | |
3b98c0c2 LE |
748 | /* Note these are not to be confused with |
749 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
750 | * which are (sub) state changes triggered by admin (drbdsetup), | |
751 | * and can be long lived. | |
752 | * This changes an mdev->flag, is triggered by drbd internals, | |
753 | * and should be short-lived. */ | |
b411b363 PR |
754 | void drbd_suspend_io(struct drbd_conf *mdev) |
755 | { | |
756 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 757 | if (drbd_suspended(mdev)) |
265be2d0 | 758 | return; |
b411b363 PR |
759 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
760 | } | |
761 | ||
762 | void drbd_resume_io(struct drbd_conf *mdev) | |
763 | { | |
764 | clear_bit(SUSPEND_IO, &mdev->flags); | |
765 | wake_up(&mdev->misc_wait); | |
766 | } | |
767 | ||
768 | /** | |
769 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
770 | * @mdev: DRBD device. | |
771 | * | |
772 | * Returns 0 on success, negative return values indicate errors. | |
773 | * You should call drbd_md_sync() after calling this function. | |
774 | */ | |
24c4830c | 775 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
776 | { |
777 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
778 | sector_t la_size; | |
779 | sector_t size; | |
780 | char ppb[10]; | |
781 | ||
782 | int md_moved, la_size_changed; | |
783 | enum determine_dev_size rv = unchanged; | |
784 | ||
785 | /* race: | |
786 | * application request passes inc_ap_bio, | |
787 | * but then cannot get an AL-reference. | |
788 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
789 | * | |
790 | * to avoid that: | |
791 | * Suspend IO right here. | |
792 | * still lock the act_log to not trigger ASSERTs there. | |
793 | */ | |
794 | drbd_suspend_io(mdev); | |
795 | ||
796 | /* no wait necessary anymore, actually we could assert that */ | |
797 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
798 | ||
799 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
800 | prev_size = mdev->ldev->md.md_size_sect; | |
801 | la_size = mdev->ldev->md.la_size_sect; | |
802 | ||
803 | /* TODO: should only be some assert here, not (re)init... */ | |
804 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
805 | ||
d845030f | 806 | size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED); |
b411b363 PR |
807 | |
808 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
809 | drbd_bm_capacity(mdev) != size) { | |
810 | int err; | |
02d9a94b | 811 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
812 | if (unlikely(err)) { |
813 | /* currently there is only one error: ENOMEM! */ | |
814 | size = drbd_bm_capacity(mdev)>>1; | |
815 | if (size == 0) { | |
816 | dev_err(DEV, "OUT OF MEMORY! " | |
817 | "Could not allocate bitmap!\n"); | |
818 | } else { | |
819 | dev_err(DEV, "BM resizing failed. " | |
820 | "Leaving size unchanged at size = %lu KB\n", | |
821 | (unsigned long)size); | |
822 | } | |
823 | rv = dev_size_error; | |
824 | } | |
825 | /* racy, see comments above. */ | |
826 | drbd_set_my_capacity(mdev, size); | |
827 | mdev->ldev->md.la_size_sect = size; | |
828 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
829 | (unsigned long long)size>>1); | |
830 | } | |
831 | if (rv == dev_size_error) | |
832 | goto out; | |
833 | ||
834 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
835 | ||
836 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
837 | || prev_size != mdev->ldev->md.md_size_sect; | |
838 | ||
839 | if (la_size_changed || md_moved) { | |
24dccabb AG |
840 | int err; |
841 | ||
b411b363 PR |
842 | drbd_al_shrink(mdev); /* All extents inactive. */ |
843 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
844 | la_size_changed && md_moved ? "size changed and md moved" : | |
845 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
846 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
847 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
848 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
849 | if (err) { |
850 | rv = dev_size_error; | |
851 | goto out; | |
852 | } | |
b411b363 PR |
853 | drbd_md_mark_dirty(mdev); |
854 | } | |
855 | ||
856 | if (size > la_size) | |
857 | rv = grew; | |
858 | if (size < la_size) | |
859 | rv = shrunk; | |
860 | out: | |
861 | lc_unlock(mdev->act_log); | |
862 | wake_up(&mdev->al_wait); | |
863 | drbd_resume_io(mdev); | |
864 | ||
865 | return rv; | |
866 | } | |
867 | ||
868 | sector_t | |
a393db6f | 869 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space) |
b411b363 PR |
870 | { |
871 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
872 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
873 | sector_t m_size; /* my size */ | |
874 | sector_t u_size = bdev->dc.disk_size; /* size requested by user. */ | |
875 | sector_t size = 0; | |
876 | ||
877 | m_size = drbd_get_max_capacity(bdev); | |
878 | ||
a393db6f PR |
879 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
880 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
881 | p_size = m_size; | |
882 | } | |
883 | ||
b411b363 PR |
884 | if (p_size && m_size) { |
885 | size = min_t(sector_t, p_size, m_size); | |
886 | } else { | |
887 | if (la_size) { | |
888 | size = la_size; | |
889 | if (m_size && m_size < size) | |
890 | size = m_size; | |
891 | if (p_size && p_size < size) | |
892 | size = p_size; | |
893 | } else { | |
894 | if (m_size) | |
895 | size = m_size; | |
896 | if (p_size) | |
897 | size = p_size; | |
898 | } | |
899 | } | |
900 | ||
901 | if (size == 0) | |
902 | dev_err(DEV, "Both nodes diskless!\n"); | |
903 | ||
904 | if (u_size) { | |
905 | if (u_size > size) | |
906 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
907 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
908 | else | |
909 | size = u_size; | |
910 | } | |
911 | ||
912 | return size; | |
913 | } | |
914 | ||
915 | /** | |
916 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
917 | * @mdev: DRBD device. | |
918 | * | |
919 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
920 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
921 | * this function. | |
922 | */ | |
f399002e | 923 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
924 | { |
925 | struct lru_cache *n, *t; | |
926 | struct lc_element *e; | |
927 | unsigned int in_use; | |
928 | int i; | |
929 | ||
f399002e LE |
930 | if (!expect(dc->al_extents >= DRBD_AL_EXTENTS_MIN)) |
931 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
b411b363 PR |
932 | |
933 | if (mdev->act_log && | |
f399002e | 934 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
935 | return 0; |
936 | ||
937 | in_use = 0; | |
938 | t = mdev->act_log; | |
7ad651b5 | 939 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 940 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
941 | |
942 | if (n == NULL) { | |
943 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
944 | return -ENOMEM; | |
945 | } | |
946 | spin_lock_irq(&mdev->al_lock); | |
947 | if (t) { | |
948 | for (i = 0; i < t->nr_elements; i++) { | |
949 | e = lc_element_by_index(t, i); | |
950 | if (e->refcnt) | |
951 | dev_err(DEV, "refcnt(%d)==%d\n", | |
952 | e->lc_number, e->refcnt); | |
953 | in_use += e->refcnt; | |
954 | } | |
955 | } | |
956 | if (!in_use) | |
957 | mdev->act_log = n; | |
958 | spin_unlock_irq(&mdev->al_lock); | |
959 | if (in_use) { | |
960 | dev_err(DEV, "Activity log still in use!\n"); | |
961 | lc_destroy(n); | |
962 | return -EBUSY; | |
963 | } else { | |
964 | if (t) | |
965 | lc_destroy(t); | |
966 | } | |
967 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
968 | return 0; | |
969 | } | |
970 | ||
99432fcc | 971 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
972 | { |
973 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
974 | int max_hw_sectors = max_bio_size >> 9; |
975 | int max_segments = 0; | |
976 | ||
977 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
978 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
979 | ||
980 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
981 | max_segments = mdev->ldev->dc.max_bio_bvecs; | |
982 | put_ldev(mdev); | |
983 | } | |
b411b363 | 984 | |
b411b363 | 985 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
986 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
987 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
988 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
989 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 990 | |
99432fcc PR |
991 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
992 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
993 | ||
994 | blk_queue_stack_limits(q, b); | |
995 | ||
996 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
997 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
998 | q->backing_dev_info.ra_pages, | |
999 | b->backing_dev_info.ra_pages); | |
1000 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
1001 | } | |
1002 | put_ldev(mdev); | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
1007 | { | |
1008 | int now, new, local, peer; | |
1009 | ||
1010 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
1011 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1012 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1013 | |
99432fcc PR |
1014 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1015 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
1016 | mdev->local_max_bio_size = local; | |
1017 | put_ldev(mdev); | |
b411b363 | 1018 | } |
99432fcc PR |
1019 | |
1020 | /* We may ignore peer limits if the peer is modern enough. | |
1021 | Because new from 8.3.8 onwards the peer can use multiple | |
1022 | BIOs for a single peer_request */ | |
1023 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1024 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 1025 | peer = mdev->peer_max_bio_size; |
31890f4a | 1026 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
1027 | peer = DRBD_MAX_SIZE_H80_PACKET; |
1028 | else /* drbd 8.3.8 onwards */ | |
1029 | peer = DRBD_MAX_BIO_SIZE; | |
1030 | } | |
1031 | ||
1032 | new = min_t(int, local, peer); | |
1033 | ||
1034 | if (mdev->state.role == R_PRIMARY && new < now) | |
1035 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1036 | ||
1037 | if (new != now) | |
1038 | dev_info(DEV, "max BIO size = %u\n", new); | |
1039 | ||
1040 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1041 | } |
1042 | ||
a18e9d1e | 1043 | /* Starts the worker thread */ |
0e29d163 | 1044 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1045 | { |
0e29d163 PR |
1046 | drbd_thread_start(&tconn->worker); |
1047 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1048 | } |
1049 | ||
a18e9d1e | 1050 | /* if still unconfigured, stops worker again. */ |
0e29d163 | 1051 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1052 | { |
0e29d163 | 1053 | spin_lock_irq(&tconn->req_lock); |
a18e9d1e | 1054 | if (conn_all_vols_unconf(tconn)) |
0e29d163 | 1055 | drbd_thread_stop_nowait(&tconn->worker); |
0e29d163 | 1056 | spin_unlock_irq(&tconn->req_lock); |
b411b363 PR |
1057 | } |
1058 | ||
0778286a PR |
1059 | /* Make sure IO is suspended before calling this function(). */ |
1060 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1061 | { | |
1062 | int s = 0; | |
1063 | ||
61610420 | 1064 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1065 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1066 | return; | |
1067 | } | |
1068 | ||
61610420 | 1069 | drbd_al_shrink(mdev); |
87eeee41 | 1070 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1071 | if (mdev->state.conn < C_CONNECTED) |
1072 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1073 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1074 | lc_unlock(mdev->act_log); |
0778286a PR |
1075 | |
1076 | if (s) | |
1077 | dev_info(DEV, "Suspended AL updates\n"); | |
1078 | } | |
1079 | ||
5979e361 LE |
1080 | |
1081 | static bool should_set_defaults(struct genl_info *info) | |
1082 | { | |
1083 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1084 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1085 | } | |
1086 | ||
1087 | /* Maybe we should we generate these functions | |
1088 | * from the drbd_genl.h magic as well? | |
1089 | * That way we would not "accidentally forget" to add defaults here. */ | |
1090 | ||
1091 | #define RESET_ARRAY_FIELD(field) do { \ | |
1092 | memset(field, 0, sizeof(field)); \ | |
1093 | field ## _len = 0; \ | |
1094 | } while (0) | |
1095 | void drbd_set_res_opts_default(struct res_opts *r) | |
1096 | { | |
1097 | RESET_ARRAY_FIELD(r->cpu_mask); | |
1098 | r->on_no_data = DRBD_ON_NO_DATA_DEF; | |
1099 | } | |
1100 | ||
1101 | static void drbd_set_net_conf_defaults(struct net_conf *nc) | |
1102 | { | |
1103 | /* Do NOT (re)set those fields marked as GENLA_F_INVARIANT | |
1104 | * in drbd_genl.h, they can only be change with disconnect/reconnect */ | |
1105 | RESET_ARRAY_FIELD(nc->shared_secret); | |
1106 | ||
1107 | RESET_ARRAY_FIELD(nc->cram_hmac_alg); | |
1108 | RESET_ARRAY_FIELD(nc->integrity_alg); | |
1109 | RESET_ARRAY_FIELD(nc->verify_alg); | |
1110 | RESET_ARRAY_FIELD(nc->csums_alg); | |
1111 | #undef RESET_ARRAY_FIELD | |
1112 | ||
1113 | nc->wire_protocol = DRBD_PROTOCOL_DEF; | |
1114 | nc->try_connect_int = DRBD_CONNECT_INT_DEF; | |
1115 | nc->timeout = DRBD_TIMEOUT_DEF; | |
1116 | nc->ping_int = DRBD_PING_INT_DEF; | |
1117 | nc->ping_timeo = DRBD_PING_TIMEO_DEF; | |
1118 | nc->sndbuf_size = DRBD_SNDBUF_SIZE_DEF; | |
1119 | nc->rcvbuf_size = DRBD_RCVBUF_SIZE_DEF; | |
1120 | nc->ko_count = DRBD_KO_COUNT_DEF; | |
1121 | nc->max_buffers = DRBD_MAX_BUFFERS_DEF; | |
1122 | nc->max_epoch_size = DRBD_MAX_EPOCH_SIZE_DEF; | |
1123 | nc->unplug_watermark = DRBD_UNPLUG_WATERMARK_DEF; | |
1124 | nc->after_sb_0p = DRBD_AFTER_SB_0P_DEF; | |
1125 | nc->after_sb_1p = DRBD_AFTER_SB_1P_DEF; | |
1126 | nc->after_sb_2p = DRBD_AFTER_SB_2P_DEF; | |
1127 | nc->rr_conflict = DRBD_RR_CONFLICT_DEF; | |
1128 | nc->on_congestion = DRBD_ON_CONGESTION_DEF; | |
1129 | nc->cong_fill = DRBD_CONG_FILL_DEF; | |
1130 | nc->cong_extents = DRBD_CONG_EXTENTS_DEF; | |
1131 | nc->two_primaries = 0; | |
1132 | nc->no_cork = 0; | |
1133 | nc->always_asbp = 0; | |
1134 | nc->use_rle = 0; | |
1135 | } | |
1136 | ||
1137 | static void drbd_set_disk_conf_defaults(struct disk_conf *dc) | |
1138 | { | |
1139 | /* Do NOT (re)set those fields marked as GENLA_F_INVARIANT | |
1140 | * in drbd_genl.h, they can only be change with detach/reattach */ | |
1141 | dc->on_io_error = DRBD_ON_IO_ERROR_DEF; | |
1142 | dc->fencing = DRBD_FENCING_DEF; | |
1143 | dc->resync_rate = DRBD_RATE_DEF; | |
1144 | dc->resync_after = DRBD_AFTER_DEF; | |
1145 | dc->al_extents = DRBD_AL_EXTENTS_DEF; | |
1146 | dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_DEF; | |
1147 | dc->c_delay_target = DRBD_C_DELAY_TARGET_DEF; | |
1148 | dc->c_fill_target = DRBD_C_FILL_TARGET_DEF; | |
1149 | dc->c_max_rate = DRBD_C_MAX_RATE_DEF; | |
1150 | dc->c_min_rate = DRBD_C_MIN_RATE_DEF; | |
1151 | dc->no_disk_barrier = 0; | |
1152 | dc->no_disk_flush = 0; | |
1153 | dc->no_disk_drain = 0; | |
1154 | dc->no_md_flush = 0; | |
1155 | } | |
1156 | ||
1157 | ||
f399002e LE |
1158 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1159 | { | |
1160 | enum drbd_ret_code retcode; | |
1161 | struct drbd_conf *mdev; | |
5ecc72c3 | 1162 | struct disk_conf *new_disk_conf; |
f399002e LE |
1163 | int err, fifo_size; |
1164 | int *rs_plan_s = NULL; | |
1165 | ||
1166 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1167 | if (!adm_ctx.reply_skb) | |
1168 | return retcode; | |
1169 | if (retcode != NO_ERROR) | |
1170 | goto out; | |
1171 | ||
1172 | mdev = adm_ctx.mdev; | |
1173 | ||
1174 | /* we also need a disk | |
1175 | * to change the options on */ | |
1176 | if (!get_ldev(mdev)) { | |
1177 | retcode = ERR_NO_DISK; | |
1178 | goto out; | |
1179 | } | |
1180 | ||
1181 | /* FIXME freeze IO, cluster wide. | |
1182 | * | |
1183 | * We should make sure no-one uses | |
1184 | * some half-updated struct when we | |
1185 | * assign it later. */ | |
1186 | ||
5ecc72c3 LE |
1187 | new_disk_conf = kmalloc(sizeof(*new_disk_conf), GFP_KERNEL); |
1188 | if (!new_disk_conf) { | |
f399002e LE |
1189 | retcode = ERR_NOMEM; |
1190 | goto fail; | |
1191 | } | |
1192 | ||
5ecc72c3 | 1193 | memcpy(new_disk_conf, &mdev->ldev->dc, sizeof(*new_disk_conf)); |
5979e361 | 1194 | if (should_set_defaults(info)) |
5ecc72c3 | 1195 | drbd_set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1196 | |
5ecc72c3 | 1197 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
f399002e LE |
1198 | if (err) { |
1199 | retcode = ERR_MANDATORY_TAG; | |
1200 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1201 | } | |
1202 | ||
5ecc72c3 LE |
1203 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1204 | new_disk_conf->resync_rate = 1; | |
f399002e LE |
1205 | |
1206 | /* clip to allowed range */ | |
5ecc72c3 LE |
1207 | if (!expect(new_disk_conf->al_extents >= DRBD_AL_EXTENTS_MIN)) |
1208 | new_disk_conf->al_extents = DRBD_AL_EXTENTS_MIN; | |
1209 | if (!expect(new_disk_conf->al_extents <= DRBD_AL_EXTENTS_MAX)) | |
1210 | new_disk_conf->al_extents = DRBD_AL_EXTENTS_MAX; | |
f399002e LE |
1211 | |
1212 | /* most sanity checks done, try to assign the new sync-after | |
1213 | * dependency. need to hold the global lock in there, | |
1214 | * to avoid a race in the dependency loop check. */ | |
5ecc72c3 | 1215 | retcode = drbd_alter_sa(mdev, new_disk_conf->resync_after); |
f399002e LE |
1216 | if (retcode != NO_ERROR) |
1217 | goto fail; | |
1218 | ||
5ecc72c3 | 1219 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
f399002e LE |
1220 | if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) { |
1221 | rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL); | |
1222 | if (!rs_plan_s) { | |
1223 | dev_err(DEV, "kmalloc of fifo_buffer failed"); | |
1224 | retcode = ERR_NOMEM; | |
1225 | goto fail; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | if (fifo_size != mdev->rs_plan_s.size) { | |
1230 | kfree(mdev->rs_plan_s.values); | |
1231 | mdev->rs_plan_s.values = rs_plan_s; | |
1232 | mdev->rs_plan_s.size = fifo_size; | |
1233 | mdev->rs_planed = 0; | |
1234 | rs_plan_s = NULL; | |
1235 | } | |
1236 | ||
1237 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
1238 | drbd_al_shrink(mdev); | |
5ecc72c3 | 1239 | err = drbd_check_al_size(mdev, new_disk_conf); |
f399002e LE |
1240 | lc_unlock(mdev->act_log); |
1241 | wake_up(&mdev->al_wait); | |
1242 | ||
1243 | if (err) { | |
1244 | retcode = ERR_NOMEM; | |
1245 | goto fail; | |
1246 | } | |
1247 | ||
1248 | /* FIXME | |
1249 | * To avoid someone looking at a half-updated struct, we probably | |
1250 | * should have a rw-semaphor on net_conf and disk_conf. | |
1251 | */ | |
5ecc72c3 | 1252 | mdev->ldev->dc = *new_disk_conf; |
f399002e LE |
1253 | |
1254 | drbd_md_sync(mdev); | |
1255 | ||
1256 | ||
1257 | if (mdev->state.conn >= C_CONNECTED) | |
1258 | drbd_send_sync_param(mdev); | |
1259 | ||
1260 | fail: | |
1261 | put_ldev(mdev); | |
5ecc72c3 | 1262 | kfree(new_disk_conf); |
f399002e LE |
1263 | kfree(rs_plan_s); |
1264 | out: | |
1265 | drbd_adm_finish(info, retcode); | |
1266 | return 0; | |
1267 | } | |
1268 | ||
3b98c0c2 | 1269 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1270 | { |
3b98c0c2 LE |
1271 | struct drbd_conf *mdev; |
1272 | int err; | |
116676ca | 1273 | enum drbd_ret_code retcode; |
b411b363 PR |
1274 | enum determine_dev_size dd; |
1275 | sector_t max_possible_sectors; | |
1276 | sector_t min_md_device_sectors; | |
1277 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
e525fd89 | 1278 | struct block_device *bdev; |
b411b363 PR |
1279 | struct lru_cache *resync_lru = NULL; |
1280 | union drbd_state ns, os; | |
f2024e7c | 1281 | enum drbd_state_rv rv; |
44ed167d | 1282 | struct net_conf *nc; |
b411b363 | 1283 | int cp_discovered = 0; |
b411b363 | 1284 | |
3b98c0c2 LE |
1285 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1286 | if (!adm_ctx.reply_skb) | |
1287 | return retcode; | |
1288 | if (retcode != NO_ERROR) | |
40cbf085 | 1289 | goto finish; |
3b98c0c2 LE |
1290 | |
1291 | mdev = adm_ctx.mdev; | |
0e29d163 | 1292 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1293 | |
1294 | /* if you want to reconfigure, please tear down first */ | |
1295 | if (mdev->state.disk > D_DISKLESS) { | |
1296 | retcode = ERR_DISK_CONFIGURED; | |
1297 | goto fail; | |
1298 | } | |
82f59cc6 LE |
1299 | /* It may just now have detached because of IO error. Make sure |
1300 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1301 | * e.g. if someone calls attach from the on-io-error handler, | |
1302 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1303 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1304 | |
3b98c0c2 | 1305 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1306 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1307 | if (!nbc) { | |
1308 | retcode = ERR_NOMEM; | |
1309 | goto fail; | |
1310 | } | |
1311 | ||
5979e361 | 1312 | drbd_set_disk_conf_defaults(&nbc->dc); |
f399002e LE |
1313 | |
1314 | err = disk_conf_from_attrs(&nbc->dc, info); | |
3b98c0c2 | 1315 | if (err) { |
b411b363 | 1316 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1317 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1318 | goto fail; |
1319 | } | |
1320 | ||
3b98c0c2 | 1321 | if ((int)nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1322 | retcode = ERR_MD_IDX_INVALID; |
1323 | goto fail; | |
1324 | } | |
1325 | ||
44ed167d PR |
1326 | rcu_read_lock(); |
1327 | nc = rcu_dereference(mdev->tconn->net_conf); | |
1328 | if (nc) { | |
1329 | if (nbc->dc.fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { | |
1330 | rcu_read_unlock(); | |
47ff2d0a PR |
1331 | retcode = ERR_STONITH_AND_PROT_A; |
1332 | goto fail; | |
1333 | } | |
1334 | } | |
44ed167d | 1335 | rcu_read_unlock(); |
47ff2d0a | 1336 | |
d4d77629 TH |
1337 | bdev = blkdev_get_by_path(nbc->dc.backing_dev, |
1338 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); | |
e525fd89 | 1339 | if (IS_ERR(bdev)) { |
b411b363 | 1340 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev, |
e525fd89 | 1341 | PTR_ERR(bdev)); |
b411b363 PR |
1342 | retcode = ERR_OPEN_DISK; |
1343 | goto fail; | |
1344 | } | |
e525fd89 TH |
1345 | nbc->backing_bdev = bdev; |
1346 | ||
1347 | /* | |
1348 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1349 | * drbd sharing one meta device. TODO in that case, paranoia | |
1350 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1351 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1352 | * should check it for you already; but if you don't, or | |
1353 | * someone fooled it, we need to double check here) | |
1354 | */ | |
d4d77629 TH |
1355 | bdev = blkdev_get_by_path(nbc->dc.meta_dev, |
1356 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
3b98c0c2 | 1357 | ((int)nbc->dc.meta_dev_idx < 0) ? |
d4d77629 | 1358 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1359 | if (IS_ERR(bdev)) { |
b411b363 | 1360 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev, |
e525fd89 | 1361 | PTR_ERR(bdev)); |
b411b363 PR |
1362 | retcode = ERR_OPEN_MD_DISK; |
1363 | goto fail; | |
1364 | } | |
e525fd89 | 1365 | nbc->md_bdev = bdev; |
b411b363 | 1366 | |
e525fd89 TH |
1367 | if ((nbc->backing_bdev == nbc->md_bdev) != |
1368 | (nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL || | |
1369 | nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
1370 | retcode = ERR_MD_IDX_INVALID; | |
b411b363 PR |
1371 | goto fail; |
1372 | } | |
1373 | ||
1374 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1375 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1376 | offsetof(struct bm_extent, lce)); |
1377 | if (!resync_lru) { | |
1378 | retcode = ERR_NOMEM; | |
e525fd89 | 1379 | goto fail; |
b411b363 PR |
1380 | } |
1381 | ||
1382 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1383 | drbd_md_set_sector_offsets(mdev, nbc); | |
1384 | ||
1385 | if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) { | |
1386 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", | |
1387 | (unsigned long long) drbd_get_max_capacity(nbc), | |
1388 | (unsigned long long) nbc->dc.disk_size); | |
1389 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1390 | goto fail; |
b411b363 PR |
1391 | } |
1392 | ||
3b98c0c2 | 1393 | if ((int)nbc->dc.meta_dev_idx < 0) { |
b411b363 PR |
1394 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1395 | /* at least one MB, otherwise it does not make sense */ | |
1396 | min_md_device_sectors = (2<<10); | |
1397 | } else { | |
1398 | max_possible_sectors = DRBD_MAX_SECTORS; | |
1399 | min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1); | |
1400 | } | |
1401 | ||
b411b363 PR |
1402 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
1403 | retcode = ERR_MD_DISK_TO_SMALL; | |
1404 | dev_warn(DEV, "refusing attach: md-device too small, " | |
1405 | "at least %llu sectors needed for this meta-disk type\n", | |
1406 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1407 | goto fail; |
b411b363 PR |
1408 | } |
1409 | ||
1410 | /* Make sure the new disk is big enough | |
1411 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1412 | if (drbd_get_max_capacity(nbc) < | |
1413 | drbd_get_capacity(mdev->this_bdev)) { | |
1414 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1415 | goto fail; |
b411b363 PR |
1416 | } |
1417 | ||
1418 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1419 | ||
1352994b LE |
1420 | if (nbc->known_size > max_possible_sectors) { |
1421 | dev_warn(DEV, "==> truncating very big lower level device " | |
1422 | "to currently maximum possible %llu sectors <==\n", | |
1423 | (unsigned long long) max_possible_sectors); | |
3b98c0c2 | 1424 | if ((int)nbc->dc.meta_dev_idx >= 0) |
1352994b LE |
1425 | dev_warn(DEV, "==>> using internal or flexible " |
1426 | "meta data may help <<==\n"); | |
1427 | } | |
1428 | ||
b411b363 PR |
1429 | drbd_suspend_io(mdev); |
1430 | /* also wait for the last barrier ack. */ | |
2aebfabb | 1431 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 | 1432 | /* and for any other previously queued work */ |
a21e9298 | 1433 | drbd_flush_workqueue(mdev); |
b411b363 | 1434 | |
f2024e7c AG |
1435 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1436 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1437 | drbd_resume_io(mdev); |
f2024e7c | 1438 | if (rv < SS_SUCCESS) |
e525fd89 | 1439 | goto fail; |
b411b363 PR |
1440 | |
1441 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1442 | goto force_diskless; | |
1443 | ||
1444 | drbd_md_set_sector_offsets(mdev, nbc); | |
1445 | ||
1446 | if (!mdev->bitmap) { | |
1447 | if (drbd_bm_init(mdev)) { | |
1448 | retcode = ERR_NOMEM; | |
1449 | goto force_diskless_dec; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | retcode = drbd_md_read(mdev, nbc); | |
1454 | if (retcode != NO_ERROR) | |
1455 | goto force_diskless_dec; | |
1456 | ||
1457 | if (mdev->state.conn < C_CONNECTED && | |
1458 | mdev->state.role == R_PRIMARY && | |
1459 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1460 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1461 | (unsigned long long)mdev->ed_uuid); | |
1462 | retcode = ERR_DATA_NOT_CURRENT; | |
1463 | goto force_diskless_dec; | |
1464 | } | |
1465 | ||
1466 | /* Since we are diskless, fix the activity log first... */ | |
f399002e | 1467 | if (drbd_check_al_size(mdev, &nbc->dc)) { |
b411b363 PR |
1468 | retcode = ERR_NOMEM; |
1469 | goto force_diskless_dec; | |
1470 | } | |
1471 | ||
1472 | /* Prevent shrinking of consistent devices ! */ | |
1473 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
a393db6f | 1474 | drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) { |
b411b363 PR |
1475 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
1476 | retcode = ERR_DISK_TO_SMALL; | |
1477 | goto force_diskless_dec; | |
1478 | } | |
1479 | ||
1480 | if (!drbd_al_read_log(mdev, nbc)) { | |
1481 | retcode = ERR_IO_MD_DISK; | |
1482 | goto force_diskless_dec; | |
1483 | } | |
1484 | ||
b411b363 PR |
1485 | /* Reset the "barriers don't work" bits here, then force meta data to |
1486 | * be written, to ensure we determine if barriers are supported. */ | |
1487 | if (nbc->dc.no_md_flush) | |
a8a4e51e | 1488 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1489 | else |
a8a4e51e | 1490 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1491 | |
1492 | /* Point of no return reached. | |
1493 | * Devices and memory are no longer released by error cleanup below. | |
1494 | * now mdev takes over responsibility, and the state engine should | |
1495 | * clean it up somewhere. */ | |
1496 | D_ASSERT(mdev->ldev == NULL); | |
1497 | mdev->ldev = nbc; | |
1498 | mdev->resync = resync_lru; | |
1499 | nbc = NULL; | |
1500 | resync_lru = NULL; | |
1501 | ||
2451fc3b PR |
1502 | mdev->write_ordering = WO_bdev_flush; |
1503 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1504 | |
1505 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1506 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1507 | else | |
1508 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1509 | ||
894c6a94 | 1510 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
da9fbc27 | 1511 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) { |
b411b363 PR |
1512 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1513 | cp_discovered = 1; | |
1514 | } | |
1515 | ||
1516 | mdev->send_cnt = 0; | |
1517 | mdev->recv_cnt = 0; | |
1518 | mdev->read_cnt = 0; | |
1519 | mdev->writ_cnt = 0; | |
1520 | ||
99432fcc | 1521 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1522 | |
1523 | /* If I am currently not R_PRIMARY, | |
1524 | * but meta data primary indicator is set, | |
1525 | * I just now recover from a hard crash, | |
1526 | * and have been R_PRIMARY before that crash. | |
1527 | * | |
1528 | * Now, if I had no connection before that crash | |
1529 | * (have been degraded R_PRIMARY), chances are that | |
1530 | * I won't find my peer now either. | |
1531 | * | |
1532 | * In that case, and _only_ in that case, | |
1533 | * we use the degr-wfc-timeout instead of the default, | |
1534 | * so we can automatically recover from a crash of a | |
1535 | * degraded but active "cluster" after a certain timeout. | |
1536 | */ | |
1537 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1538 | if (mdev->state.role != R_PRIMARY && | |
1539 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1540 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1541 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1542 | ||
24c4830c | 1543 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1544 | if (dd == dev_size_error) { |
1545 | retcode = ERR_NOMEM_BITMAP; | |
1546 | goto force_diskless_dec; | |
1547 | } else if (dd == grew) | |
1548 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1549 | ||
1550 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1551 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1552 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1553 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1554 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1555 | retcode = ERR_IO_MD_DISK; |
1556 | goto force_diskless_dec; | |
1557 | } | |
1558 | } else { | |
20ceb2b2 | 1559 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1560 | "read from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1561 | retcode = ERR_IO_MD_DISK; |
1562 | goto force_diskless_dec; | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | if (cp_discovered) { | |
1567 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1568 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1569 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1570 | retcode = ERR_IO_MD_DISK; |
1571 | goto force_diskless_dec; | |
1572 | } | |
b411b363 PR |
1573 | } |
1574 | ||
0778286a PR |
1575 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1576 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1577 | ||
87eeee41 | 1578 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1579 | os = drbd_read_state(mdev); |
1580 | ns = os; | |
b411b363 PR |
1581 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1582 | otherwise investigate MDF_WasUpToDate... | |
1583 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1584 | otherwise into D_CONSISTENT state. | |
1585 | */ | |
1586 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1587 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1588 | ns.disk = D_CONSISTENT; | |
1589 | else | |
1590 | ns.disk = D_OUTDATED; | |
1591 | } else { | |
1592 | ns.disk = D_INCONSISTENT; | |
1593 | } | |
1594 | ||
1595 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1596 | ns.pdsk = D_OUTDATED; | |
1597 | ||
1598 | if ( ns.disk == D_CONSISTENT && | |
1599 | (ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE)) | |
1600 | ns.disk = D_UP_TO_DATE; | |
1601 | ||
1602 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1603 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1604 | this point, because drbd_request_state() modifies these | |
1605 | flags. */ | |
1606 | ||
1607 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1608 | state after the negotiation phase. */ | |
1609 | if (mdev->state.conn == C_CONNECTED) { | |
1610 | mdev->new_state_tmp.i = ns.i; | |
1611 | ns.i = os.i; | |
1612 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1613 | |
1614 | /* We expect to receive up-to-date UUIDs soon. | |
1615 | To avoid a race in receive_state, free p_uuid while | |
1616 | holding req_lock. I.e. atomic with the state change */ | |
1617 | kfree(mdev->p_uuid); | |
1618 | mdev->p_uuid = NULL; | |
b411b363 PR |
1619 | } |
1620 | ||
1621 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1622 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1623 | |
1624 | if (rv < SS_SUCCESS) | |
1625 | goto force_diskless_dec; | |
1626 | ||
1627 | if (mdev->state.role == R_PRIMARY) | |
1628 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1629 | else | |
1630 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1631 | ||
1632 | drbd_md_mark_dirty(mdev); | |
1633 | drbd_md_sync(mdev); | |
1634 | ||
1635 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1636 | put_ldev(mdev); | |
0e29d163 | 1637 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1638 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1639 | return 0; |
1640 | ||
1641 | force_diskless_dec: | |
1642 | put_ldev(mdev); | |
1643 | force_diskless: | |
82f59cc6 | 1644 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1645 | drbd_md_sync(mdev); |
b411b363 | 1646 | fail: |
40cbf085 | 1647 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1648 | if (nbc) { |
e525fd89 TH |
1649 | if (nbc->backing_bdev) |
1650 | blkdev_put(nbc->backing_bdev, | |
1651 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1652 | if (nbc->md_bdev) | |
1653 | blkdev_put(nbc->md_bdev, | |
1654 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1655 | kfree(nbc); |
1656 | } | |
1657 | lc_destroy(resync_lru); | |
1658 | ||
40cbf085 | 1659 | finish: |
3b98c0c2 | 1660 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1661 | return 0; |
1662 | } | |
1663 | ||
85f75dd7 LE |
1664 | static int adm_detach(struct drbd_conf *mdev) |
1665 | { | |
19f83c76 | 1666 | enum drbd_state_rv retcode; |
85f75dd7 LE |
1667 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
1668 | retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS)); | |
1669 | wait_event(mdev->misc_wait, | |
1670 | mdev->state.disk != D_DISKLESS || | |
1671 | !atomic_read(&mdev->local_cnt)); | |
1672 | drbd_resume_io(mdev); | |
1673 | return retcode; | |
1674 | } | |
1675 | ||
82f59cc6 LE |
1676 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1677 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1678 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1679 | * internal references as well. | |
1680 | * Only then we have finally detached. */ | |
3b98c0c2 | 1681 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1682 | { |
9a0d9d03 | 1683 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1684 | |
1685 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1686 | if (!adm_ctx.reply_skb) | |
1687 | return retcode; | |
1688 | if (retcode != NO_ERROR) | |
1689 | goto out; | |
1690 | ||
85f75dd7 | 1691 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1692 | out: |
1693 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1694 | return 0; |
1695 | } | |
1696 | ||
f399002e LE |
1697 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1698 | { | |
1699 | struct drbd_conf *mdev; | |
695d08fa | 1700 | bool rv = false; |
f399002e LE |
1701 | int vnr; |
1702 | ||
695d08fa | 1703 | rcu_read_lock(); |
f399002e LE |
1704 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1705 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1706 | mdev->state.conn == C_SYNC_TARGET || | |
1707 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1708 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1709 | rv = true; | |
1710 | break; | |
1711 | } | |
f399002e | 1712 | } |
695d08fa PR |
1713 | rcu_read_unlock(); |
1714 | ||
1715 | return rv; | |
f399002e LE |
1716 | } |
1717 | ||
1718 | static bool conn_ov_running(struct drbd_tconn *tconn) | |
1719 | { | |
1720 | struct drbd_conf *mdev; | |
695d08fa | 1721 | bool rv = false; |
f399002e LE |
1722 | int vnr; |
1723 | ||
695d08fa | 1724 | rcu_read_lock(); |
f399002e LE |
1725 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1726 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1727 | mdev->state.conn == C_VERIFY_T) { |
1728 | rv = true; | |
1729 | break; | |
1730 | } | |
f399002e | 1731 | } |
695d08fa PR |
1732 | rcu_read_unlock(); |
1733 | ||
1734 | return rv; | |
f399002e LE |
1735 | } |
1736 | ||
cd64397c | 1737 | static enum drbd_ret_code |
44ed167d | 1738 | _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf) |
cd64397c PR |
1739 | { |
1740 | struct drbd_conf *mdev; | |
1741 | int i; | |
1742 | ||
44ed167d | 1743 | if (old_conf && tconn->agreed_pro_version < 100 && |
b032b6fa | 1744 | tconn->cstate == C_WF_REPORT_PARAMS && |
44ed167d | 1745 | new_conf->wire_protocol != old_conf->wire_protocol) |
b032b6fa PR |
1746 | return ERR_NEED_APV_100; |
1747 | ||
cd64397c PR |
1748 | if (new_conf->two_primaries && |
1749 | (new_conf->wire_protocol != DRBD_PROT_C)) | |
1750 | return ERR_NOT_PROTO_C; | |
1751 | ||
cd64397c PR |
1752 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1753 | if (get_ldev(mdev)) { | |
1754 | enum drbd_fencing_p fp = mdev->ldev->dc.fencing; | |
1755 | put_ldev(mdev); | |
44ed167d | 1756 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 1757 | return ERR_STONITH_AND_PROT_A; |
cd64397c | 1758 | } |
44ed167d | 1759 | if (mdev->state.role == R_PRIMARY && new_conf->want_lose) |
cd64397c | 1760 | return ERR_DISCARD; |
cd64397c | 1761 | } |
cd64397c PR |
1762 | |
1763 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) | |
1764 | return ERR_CONG_NOT_PROTO_A; | |
1765 | ||
1766 | return NO_ERROR; | |
1767 | } | |
1768 | ||
44ed167d PR |
1769 | static enum drbd_ret_code |
1770 | check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf) | |
1771 | { | |
1772 | static enum drbd_ret_code rv; | |
1773 | struct drbd_conf *mdev; | |
1774 | int i; | |
1775 | ||
1776 | rcu_read_lock(); | |
1777 | rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf); | |
1778 | rcu_read_unlock(); | |
1779 | ||
1780 | /* tconn->volumes protected by genl_lock() here */ | |
1781 | idr_for_each_entry(&tconn->volumes, mdev, i) { | |
1782 | if (!mdev->bitmap) { | |
1783 | if(drbd_bm_init(mdev)) | |
1784 | return ERR_NOMEM; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | return rv; | |
1789 | } | |
1790 | ||
0fd0ea06 PR |
1791 | struct crypto { |
1792 | struct crypto_hash *verify_tfm; | |
1793 | struct crypto_hash *csums_tfm; | |
1794 | struct crypto_hash *cram_hmac_tfm; | |
8d412fc6 | 1795 | struct crypto_hash *integrity_tfm; |
0fd0ea06 PR |
1796 | void *int_dig_in; |
1797 | void *int_dig_vv; | |
1798 | }; | |
1799 | ||
1800 | static int | |
4b6ad6d4 | 1801 | alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
1802 | { |
1803 | if (!tfm_name[0]) | |
1804 | return NO_ERROR; | |
1805 | ||
1806 | *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC); | |
1807 | if (IS_ERR(*tfm)) { | |
1808 | *tfm = NULL; | |
1809 | return err_alg; | |
1810 | } | |
1811 | ||
0fd0ea06 PR |
1812 | return NO_ERROR; |
1813 | } | |
1814 | ||
1815 | static enum drbd_ret_code | |
1816 | alloc_crypto(struct crypto *crypto, struct net_conf *new_conf) | |
1817 | { | |
1818 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
1819 | enum drbd_ret_code rv; | |
1820 | int hash_size; | |
1821 | ||
4b6ad6d4 AG |
1822 | rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg, |
1823 | ERR_CSUMS_ALG); | |
0fd0ea06 PR |
1824 | if (rv != NO_ERROR) |
1825 | return rv; | |
4b6ad6d4 AG |
1826 | rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg, |
1827 | ERR_VERIFY_ALG); | |
0fd0ea06 PR |
1828 | if (rv != NO_ERROR) |
1829 | return rv; | |
4b6ad6d4 AG |
1830 | rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg, |
1831 | ERR_INTEGRITY_ALG); | |
0fd0ea06 PR |
1832 | if (rv != NO_ERROR) |
1833 | return rv; | |
0fd0ea06 PR |
1834 | if (new_conf->cram_hmac_alg[0] != 0) { |
1835 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1836 | new_conf->cram_hmac_alg); | |
1837 | ||
4b6ad6d4 AG |
1838 | rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name, |
1839 | ERR_AUTH_ALG); | |
0fd0ea06 | 1840 | } |
8d412fc6 AG |
1841 | if (crypto->integrity_tfm) { |
1842 | hash_size = crypto_hash_digestsize(crypto->integrity_tfm); | |
0fd0ea06 PR |
1843 | crypto->int_dig_in = kmalloc(hash_size, GFP_KERNEL); |
1844 | if (!crypto->int_dig_in) | |
1845 | return ERR_NOMEM; | |
1846 | crypto->int_dig_vv = kmalloc(hash_size, GFP_KERNEL); | |
1847 | if (!crypto->int_dig_vv) | |
1848 | return ERR_NOMEM; | |
1849 | } | |
1850 | ||
1851 | return rv; | |
1852 | } | |
1853 | ||
1854 | static void free_crypto(struct crypto *crypto) | |
1855 | { | |
1856 | kfree(crypto->int_dig_in); | |
1857 | kfree(crypto->int_dig_vv); | |
1858 | crypto_free_hash(crypto->cram_hmac_tfm); | |
8d412fc6 | 1859 | crypto_free_hash(crypto->integrity_tfm); |
0fd0ea06 PR |
1860 | crypto_free_hash(crypto->csums_tfm); |
1861 | crypto_free_hash(crypto->verify_tfm); | |
1862 | } | |
1863 | ||
f399002e LE |
1864 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
1865 | { | |
1866 | enum drbd_ret_code retcode; | |
1867 | struct drbd_tconn *tconn; | |
44ed167d | 1868 | struct net_conf *old_conf, *new_conf = NULL; |
f399002e LE |
1869 | int err; |
1870 | int ovr; /* online verify running */ | |
1871 | int rsr; /* re-sync running */ | |
0fd0ea06 | 1872 | struct crypto crypto = { }; |
88104ca4 | 1873 | bool change_integrity_alg; |
f399002e LE |
1874 | |
1875 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); | |
1876 | if (!adm_ctx.reply_skb) | |
1877 | return retcode; | |
1878 | if (retcode != NO_ERROR) | |
1879 | goto out; | |
1880 | ||
1881 | tconn = adm_ctx.tconn; | |
1882 | ||
1883 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); | |
1884 | if (!new_conf) { | |
1885 | retcode = ERR_NOMEM; | |
1886 | goto out; | |
1887 | } | |
1888 | ||
44ed167d PR |
1889 | conn_reconfig_start(tconn); |
1890 | ||
88104ca4 | 1891 | mutex_lock(&tconn->data.mutex); |
91fd4dad PR |
1892 | mutex_lock(&tconn->net_conf_update); |
1893 | old_conf = tconn->net_conf; | |
44ed167d PR |
1894 | |
1895 | if (!old_conf) { | |
f399002e LE |
1896 | drbd_msg_put_info("net conf missing, try connect"); |
1897 | retcode = ERR_INVALID_REQUEST; | |
91fd4dad | 1898 | goto fail; |
f399002e LE |
1899 | } |
1900 | ||
44ed167d | 1901 | *new_conf = *old_conf; |
5979e361 LE |
1902 | if (should_set_defaults(info)) |
1903 | drbd_set_net_conf_defaults(new_conf); | |
f399002e | 1904 | |
f399002e LE |
1905 | err = net_conf_from_attrs_for_change(new_conf, info); |
1906 | if (err) { | |
1907 | retcode = ERR_MANDATORY_TAG; | |
1908 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1909 | goto fail; | |
1910 | } | |
1911 | ||
cd64397c PR |
1912 | retcode = check_net_options(tconn, new_conf); |
1913 | if (retcode != NO_ERROR) | |
1914 | goto fail; | |
1915 | ||
f399002e LE |
1916 | /* re-sync running */ |
1917 | rsr = conn_resync_running(tconn); | |
0fd0ea06 | 1918 | if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) { |
f399002e | 1919 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 1920 | goto fail; |
f399002e LE |
1921 | } |
1922 | ||
f399002e LE |
1923 | /* online verify running */ |
1924 | ovr = conn_ov_running(tconn); | |
0fd0ea06 PR |
1925 | if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) { |
1926 | retcode = ERR_VERIFY_RUNNING; | |
1927 | goto fail; | |
f399002e LE |
1928 | } |
1929 | ||
88104ca4 AG |
1930 | change_integrity_alg = strcmp(old_conf->integrity_alg, |
1931 | new_conf->integrity_alg); | |
1932 | ||
0fd0ea06 PR |
1933 | retcode = alloc_crypto(&crypto, new_conf); |
1934 | if (retcode != NO_ERROR) | |
1935 | goto fail; | |
f399002e | 1936 | |
44ed167d | 1937 | rcu_assign_pointer(tconn->net_conf, new_conf); |
f399002e LE |
1938 | |
1939 | if (!rsr) { | |
1940 | crypto_free_hash(tconn->csums_tfm); | |
0fd0ea06 PR |
1941 | tconn->csums_tfm = crypto.csums_tfm; |
1942 | crypto.csums_tfm = NULL; | |
f399002e LE |
1943 | } |
1944 | if (!ovr) { | |
1945 | crypto_free_hash(tconn->verify_tfm); | |
0fd0ea06 PR |
1946 | tconn->verify_tfm = crypto.verify_tfm; |
1947 | crypto.verify_tfm = NULL; | |
f399002e LE |
1948 | } |
1949 | ||
0fd0ea06 PR |
1950 | kfree(tconn->int_dig_in); |
1951 | tconn->int_dig_in = crypto.int_dig_in; | |
1952 | kfree(tconn->int_dig_vv); | |
1953 | tconn->int_dig_vv = crypto.int_dig_vv; | |
8d412fc6 AG |
1954 | crypto_free_hash(tconn->integrity_tfm); |
1955 | tconn->integrity_tfm = crypto.integrity_tfm; | |
88104ca4 AG |
1956 | if (change_integrity_alg) { |
1957 | /* Do this without trying to take tconn->data.mutex again. */ | |
1958 | if (__drbd_send_protocol(tconn)) | |
1959 | goto fail; | |
1960 | } | |
0fd0ea06 PR |
1961 | |
1962 | /* FIXME Changing cram_hmac while the connection is established is useless */ | |
1963 | crypto_free_hash(tconn->cram_hmac_tfm); | |
1964 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
1965 | ||
91fd4dad | 1966 | mutex_unlock(&tconn->net_conf_update); |
88104ca4 | 1967 | mutex_unlock(&tconn->data.mutex); |
91fd4dad PR |
1968 | synchronize_rcu(); |
1969 | kfree(old_conf); | |
1970 | ||
f399002e LE |
1971 | if (tconn->cstate >= C_WF_REPORT_PARAMS) |
1972 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
1973 | ||
91fd4dad PR |
1974 | goto done; |
1975 | ||
f399002e | 1976 | fail: |
91fd4dad | 1977 | mutex_unlock(&tconn->net_conf_update); |
88104ca4 | 1978 | mutex_unlock(&tconn->data.mutex); |
0fd0ea06 | 1979 | free_crypto(&crypto); |
f399002e | 1980 | kfree(new_conf); |
91fd4dad | 1981 | done: |
f399002e LE |
1982 | conn_reconfig_done(tconn); |
1983 | out: | |
1984 | drbd_adm_finish(info, retcode); | |
1985 | return 0; | |
1986 | } | |
1987 | ||
3b98c0c2 | 1988 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1989 | { |
3b98c0c2 | 1990 | struct drbd_conf *mdev; |
44ed167d | 1991 | struct net_conf *old_conf, *new_conf = NULL; |
0fd0ea06 | 1992 | struct crypto crypto = { }; |
80883197 | 1993 | struct drbd_tconn *oconn; |
3b98c0c2 | 1994 | struct drbd_tconn *tconn; |
b411b363 | 1995 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1996 | enum drbd_ret_code retcode; |
1997 | int i; | |
1998 | int err; | |
b411b363 | 1999 | |
3b98c0c2 LE |
2000 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2001 | if (!adm_ctx.reply_skb) | |
2002 | return retcode; | |
2003 | if (retcode != NO_ERROR) | |
2004 | goto out; | |
2005 | ||
2006 | tconn = adm_ctx.tconn; | |
80883197 | 2007 | conn_reconfig_start(tconn); |
b411b363 | 2008 | |
80883197 | 2009 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
2010 | retcode = ERR_NET_CONFIGURED; |
2011 | goto fail; | |
2012 | } | |
2013 | ||
2014 | /* allocation not in the IO path, cqueue thread context */ | |
5979e361 | 2015 | new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL); |
b411b363 PR |
2016 | if (!new_conf) { |
2017 | retcode = ERR_NOMEM; | |
2018 | goto fail; | |
2019 | } | |
2020 | ||
5979e361 | 2021 | drbd_set_net_conf_defaults(new_conf); |
f399002e LE |
2022 | |
2023 | err = net_conf_from_attrs(new_conf, info); | |
3b98c0c2 | 2024 | if (err) { |
b411b363 | 2025 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2026 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2027 | goto fail; |
2028 | } | |
2029 | ||
cd64397c PR |
2030 | retcode = check_net_options(tconn, new_conf); |
2031 | if (retcode != NO_ERROR) | |
422028b1 | 2032 | goto fail; |
422028b1 | 2033 | |
b411b363 PR |
2034 | retcode = NO_ERROR; |
2035 | ||
2036 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
2037 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b | 2038 | |
ef356262 | 2039 | /* No need to take drbd_cfg_rwsem here. All reconfiguration is |
543cc10b LE |
2040 | * strictly serialized on genl_lock(). We are protected against |
2041 | * concurrent reconfiguration/addition/deletion */ | |
80883197 | 2042 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
44ed167d | 2043 | struct net_conf *nc; |
80883197 | 2044 | if (oconn == tconn) |
b411b363 | 2045 | continue; |
44ed167d PR |
2046 | |
2047 | rcu_read_lock(); | |
2048 | nc = rcu_dereference(oconn->net_conf); | |
2049 | if (nc) { | |
2050 | taken_addr = (struct sockaddr *)&nc->my_addr; | |
2051 | if (new_conf->my_addr_len == nc->my_addr_len && | |
b411b363 PR |
2052 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
2053 | retcode = ERR_LOCAL_ADDR; | |
2054 | ||
44ed167d PR |
2055 | taken_addr = (struct sockaddr *)&nc->peer_addr; |
2056 | if (new_conf->peer_addr_len == nc->peer_addr_len && | |
b411b363 PR |
2057 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
2058 | retcode = ERR_PEER_ADDR; | |
b411b363 | 2059 | } |
44ed167d PR |
2060 | rcu_read_unlock(); |
2061 | if (retcode != NO_ERROR) | |
2062 | goto fail; | |
b411b363 PR |
2063 | } |
2064 | ||
0fd0ea06 PR |
2065 | retcode = alloc_crypto(&crypto, new_conf); |
2066 | if (retcode != NO_ERROR) | |
2067 | goto fail; | |
b411b363 | 2068 | |
b411b363 PR |
2069 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
2070 | ||
80883197 | 2071 | conn_flush_workqueue(tconn); |
91fd4dad PR |
2072 | |
2073 | mutex_lock(&tconn->net_conf_update); | |
2074 | old_conf = tconn->net_conf; | |
2075 | if (old_conf) { | |
b411b363 | 2076 | retcode = ERR_NET_CONFIGURED; |
91fd4dad | 2077 | mutex_unlock(&tconn->net_conf_update); |
b411b363 PR |
2078 | goto fail; |
2079 | } | |
44ed167d | 2080 | rcu_assign_pointer(tconn->net_conf, new_conf); |
b411b363 | 2081 | |
91fd4dad | 2082 | conn_free_crypto(tconn); |
0fd0ea06 PR |
2083 | tconn->int_dig_in = crypto.int_dig_in; |
2084 | tconn->int_dig_vv = crypto.int_dig_vv; | |
2085 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
8d412fc6 | 2086 | tconn->integrity_tfm = crypto.integrity_tfm; |
0fd0ea06 PR |
2087 | tconn->csums_tfm = crypto.csums_tfm; |
2088 | tconn->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2089 | |
91fd4dad PR |
2090 | mutex_unlock(&tconn->net_conf_update); |
2091 | ||
695d08fa | 2092 | rcu_read_lock(); |
80883197 PR |
2093 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2094 | mdev->send_cnt = 0; | |
2095 | mdev->recv_cnt = 0; | |
80883197 | 2096 | } |
695d08fa | 2097 | rcu_read_unlock(); |
5ee743e9 LE |
2098 | |
2099 | retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
2100 | ||
80883197 | 2101 | conn_reconfig_done(tconn); |
3b98c0c2 | 2102 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2103 | return 0; |
2104 | ||
2105 | fail: | |
0fd0ea06 | 2106 | free_crypto(&crypto); |
b411b363 PR |
2107 | kfree(new_conf); |
2108 | ||
80883197 | 2109 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2110 | out: |
2111 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2112 | return 0; |
2113 | } | |
2114 | ||
85f75dd7 LE |
2115 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2116 | { | |
2117 | enum drbd_state_rv rv; | |
2118 | if (force) { | |
2119 | spin_lock_irq(&tconn->req_lock); | |
d9cc6e23 | 2120 | rv = _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); |
85f75dd7 | 2121 | spin_unlock_irq(&tconn->req_lock); |
d9cc6e23 | 2122 | return rv; |
85f75dd7 LE |
2123 | } |
2124 | ||
2125 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), 0); | |
2126 | ||
2127 | switch (rv) { | |
2128 | case SS_NOTHING_TO_DO: | |
2129 | case SS_ALREADY_STANDALONE: | |
2130 | return SS_SUCCESS; | |
2131 | case SS_PRIMARY_NOP: | |
2132 | /* Our state checking code wants to see the peer outdated. */ | |
2133 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2134 | pdsk, D_OUTDATED), CS_VERBOSE); | |
2135 | break; | |
2136 | case SS_CW_FAILED_BY_PEER: | |
2137 | /* The peer probably wants to see us outdated. */ | |
2138 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2139 | disk, D_OUTDATED), 0); | |
2140 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
2141 | conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
2142 | rv = SS_SUCCESS; | |
2143 | } | |
2144 | break; | |
2145 | default:; | |
2146 | /* no special handling necessary */ | |
2147 | } | |
2148 | ||
2149 | return rv; | |
2150 | } | |
2151 | ||
3b98c0c2 | 2152 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2153 | { |
3b98c0c2 LE |
2154 | struct disconnect_parms parms; |
2155 | struct drbd_tconn *tconn; | |
85f75dd7 | 2156 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2157 | enum drbd_ret_code retcode; |
2158 | int err; | |
2561b9c1 | 2159 | |
3b98c0c2 LE |
2160 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2161 | if (!adm_ctx.reply_skb) | |
2162 | return retcode; | |
2163 | if (retcode != NO_ERROR) | |
2561b9c1 | 2164 | goto fail; |
3b98c0c2 LE |
2165 | |
2166 | tconn = adm_ctx.tconn; | |
2167 | memset(&parms, 0, sizeof(parms)); | |
2168 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2169 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2170 | if (err) { |
2171 | retcode = ERR_MANDATORY_TAG; | |
2172 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2173 | goto fail; | |
2174 | } | |
2561b9c1 PR |
2175 | } |
2176 | ||
85f75dd7 LE |
2177 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2178 | if (rv < SS_SUCCESS) | |
b411b363 PR |
2179 | goto fail; |
2180 | ||
d9cc6e23 LE |
2181 | /* No one else can reconfigure the network while I am here. |
2182 | * The state handling only uses drbd_thread_stop_nowait(), | |
2183 | * we want to really wait here until the receiver is no more. */ | |
2184 | drbd_thread_stop(&tconn->receiver); | |
df24aa45 | 2185 | if (wait_event_interruptible(tconn->ping_wait, |
d9cc6e23 | 2186 | tconn->cstate == C_STANDALONE)) { |
b411b363 PR |
2187 | retcode = ERR_INTR; |
2188 | goto fail; | |
2189 | } | |
2190 | ||
b411b363 PR |
2191 | retcode = NO_ERROR; |
2192 | fail: | |
3b98c0c2 | 2193 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2194 | return 0; |
2195 | } | |
2196 | ||
2197 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2198 | { | |
2199 | int iass; /* I am sync source */ | |
2200 | ||
2201 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2202 | if (mdev->state.role != mdev->state.peer) | |
2203 | iass = (mdev->state.role == R_PRIMARY); | |
2204 | else | |
25703f83 | 2205 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
2206 | |
2207 | if (iass) | |
2208 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2209 | else | |
2210 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2211 | } | |
2212 | ||
3b98c0c2 | 2213 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2214 | { |
3b98c0c2 LE |
2215 | struct resize_parms rs; |
2216 | struct drbd_conf *mdev; | |
2217 | enum drbd_ret_code retcode; | |
b411b363 | 2218 | enum determine_dev_size dd; |
6495d2c6 | 2219 | enum dds_flags ddsf; |
3b98c0c2 | 2220 | int err; |
b411b363 | 2221 | |
3b98c0c2 LE |
2222 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2223 | if (!adm_ctx.reply_skb) | |
2224 | return retcode; | |
2225 | if (retcode != NO_ERROR) | |
b411b363 | 2226 | goto fail; |
3b98c0c2 LE |
2227 | |
2228 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2229 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2230 | err = resize_parms_from_attrs(&rs, info); |
3b98c0c2 LE |
2231 | if (err) { |
2232 | retcode = ERR_MANDATORY_TAG; | |
2233 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2234 | goto fail; | |
2235 | } | |
b411b363 PR |
2236 | } |
2237 | ||
3b98c0c2 | 2238 | mdev = adm_ctx.mdev; |
b411b363 PR |
2239 | if (mdev->state.conn > C_CONNECTED) { |
2240 | retcode = ERR_RESIZE_RESYNC; | |
2241 | goto fail; | |
2242 | } | |
2243 | ||
2244 | if (mdev->state.role == R_SECONDARY && | |
2245 | mdev->state.peer == R_SECONDARY) { | |
2246 | retcode = ERR_NO_PRIMARY; | |
2247 | goto fail; | |
2248 | } | |
2249 | ||
2250 | if (!get_ldev(mdev)) { | |
2251 | retcode = ERR_NO_DISK; | |
2252 | goto fail; | |
2253 | } | |
2254 | ||
31890f4a | 2255 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
2256 | retcode = ERR_NEED_APV_93; |
2257 | goto fail; | |
2258 | } | |
2259 | ||
087c2492 | 2260 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2261 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 PR |
2262 | |
2263 | mdev->ldev->dc.disk_size = (sector_t)rs.resize_size; | |
6495d2c6 | 2264 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2265 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2266 | drbd_md_sync(mdev); |
2267 | put_ldev(mdev); | |
2268 | if (dd == dev_size_error) { | |
2269 | retcode = ERR_NOMEM_BITMAP; | |
2270 | goto fail; | |
2271 | } | |
2272 | ||
087c2492 | 2273 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2274 | if (dd == grew) |
2275 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2276 | ||
2277 | drbd_send_uuids(mdev); | |
6495d2c6 | 2278 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
2279 | } |
2280 | ||
2281 | fail: | |
3b98c0c2 | 2282 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2283 | return 0; |
2284 | } | |
2285 | ||
f399002e | 2286 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2287 | { |
3b98c0c2 | 2288 | enum drbd_ret_code retcode; |
b411b363 | 2289 | cpumask_var_t new_cpu_mask; |
f399002e | 2290 | struct drbd_tconn *tconn; |
778f271d | 2291 | int *rs_plan_s = NULL; |
b57a1e27 | 2292 | struct res_opts res_opts; |
f399002e | 2293 | int err; |
b411b363 | 2294 | |
f399002e | 2295 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3b98c0c2 LE |
2296 | if (!adm_ctx.reply_skb) |
2297 | return retcode; | |
2298 | if (retcode != NO_ERROR) | |
2299 | goto fail; | |
f399002e | 2300 | tconn = adm_ctx.tconn; |
3b98c0c2 | 2301 | |
b411b363 PR |
2302 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
2303 | retcode = ERR_NOMEM; | |
3b98c0c2 | 2304 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
2305 | goto fail; |
2306 | } | |
2307 | ||
b57a1e27 | 2308 | res_opts = tconn->res_opts; |
5979e361 | 2309 | if (should_set_defaults(info)) |
b57a1e27 | 2310 | drbd_set_res_opts_default(&res_opts); |
b411b363 | 2311 | |
b57a1e27 | 2312 | err = res_opts_from_attrs(&res_opts, info); |
3b98c0c2 | 2313 | if (err) { |
b411b363 | 2314 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2315 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2316 | goto fail; |
2317 | } | |
2318 | ||
b411b363 | 2319 | /* silently ignore cpu mask on UP kernel */ |
b57a1e27 LE |
2320 | if (nr_cpu_ids > 1 && res_opts.cpu_mask[0] != 0) { |
2321 | err = __bitmap_parse(res_opts.cpu_mask, 32, 0, | |
b411b363 PR |
2322 | cpumask_bits(new_cpu_mask), nr_cpu_ids); |
2323 | if (err) { | |
f399002e | 2324 | conn_warn(tconn, "__bitmap_parse() failed with %d\n", err); |
b411b363 PR |
2325 | retcode = ERR_CPU_MASK_PARSE; |
2326 | goto fail; | |
2327 | } | |
2328 | } | |
2329 | ||
b411b363 | 2330 | |
b57a1e27 | 2331 | tconn->res_opts = res_opts; |
b411b363 | 2332 | |
f399002e LE |
2333 | if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) { |
2334 | cpumask_copy(tconn->cpu_mask, new_cpu_mask); | |
2335 | drbd_calc_cpu_mask(tconn); | |
2336 | tconn->receiver.reset_cpu_mask = 1; | |
2337 | tconn->asender.reset_cpu_mask = 1; | |
2338 | tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2339 | } |
2340 | ||
b411b363 | 2341 | fail: |
778f271d | 2342 | kfree(rs_plan_s); |
b411b363 | 2343 | free_cpumask_var(new_cpu_mask); |
3b98c0c2 LE |
2344 | |
2345 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2346 | return 0; |
2347 | } | |
2348 | ||
3b98c0c2 | 2349 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2350 | { |
3b98c0c2 LE |
2351 | struct drbd_conf *mdev; |
2352 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2353 | ||
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; | |
2359 | ||
2360 | mdev = adm_ctx.mdev; | |
b411b363 | 2361 | |
194bfb32 LE |
2362 | /* If there is still bitmap IO pending, probably because of a previous |
2363 | * resync just being finished, wait for it before requesting a new resync. */ | |
2364 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2365 | ||
b411b363 PR |
2366 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2367 | ||
2368 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2369 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2370 | ||
2371 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2372 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2373 | if (mdev->state.conn < C_CONNECTED) |
2374 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2375 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2376 | |
2377 | if (retcode != SS_NEED_CONNECTION) | |
2378 | break; | |
2379 | ||
2380 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2381 | } | |
2382 | ||
3b98c0c2 LE |
2383 | out: |
2384 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2385 | return 0; |
2386 | } | |
2387 | ||
0778286a PR |
2388 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2389 | { | |
2390 | int rv; | |
2391 | ||
2392 | rv = drbd_bmio_set_n_write(mdev); | |
2393 | drbd_suspend_al(mdev); | |
2394 | return rv; | |
2395 | } | |
2396 | ||
3b98c0c2 LE |
2397 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2398 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2399 | { |
3b98c0c2 | 2400 | enum drbd_ret_code retcode; |
194bfb32 | 2401 | |
3b98c0c2 LE |
2402 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2403 | if (!adm_ctx.reply_skb) | |
2404 | return retcode; | |
2405 | if (retcode != NO_ERROR) | |
2406 | goto out; | |
b411b363 | 2407 | |
3b98c0c2 LE |
2408 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2409 | out: | |
2410 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2411 | return 0; |
2412 | } | |
2413 | ||
3b98c0c2 | 2414 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2415 | { |
3b98c0c2 LE |
2416 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2417 | } | |
b411b363 | 2418 | |
3b98c0c2 LE |
2419 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2420 | { | |
2421 | enum drbd_ret_code retcode; | |
2422 | ||
2423 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2424 | if (!adm_ctx.reply_skb) | |
2425 | return retcode; | |
2426 | if (retcode != NO_ERROR) | |
2427 | goto out; | |
b411b363 | 2428 | |
3b98c0c2 LE |
2429 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2430 | retcode = ERR_PAUSE_IS_SET; | |
2431 | out: | |
2432 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2433 | return 0; |
2434 | } | |
2435 | ||
3b98c0c2 | 2436 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2437 | { |
da9fbc27 | 2438 | union drbd_dev_state s; |
3b98c0c2 LE |
2439 | enum drbd_ret_code retcode; |
2440 | ||
2441 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2442 | if (!adm_ctx.reply_skb) | |
2443 | return retcode; | |
2444 | if (retcode != NO_ERROR) | |
2445 | goto out; | |
b411b363 | 2446 | |
3b98c0c2 LE |
2447 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2448 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2449 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2450 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2451 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2452 | } else { | |
2453 | retcode = ERR_PAUSE_IS_CLEAR; | |
2454 | } | |
2455 | } | |
b411b363 | 2456 | |
3b98c0c2 LE |
2457 | out: |
2458 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2459 | return 0; |
2460 | } | |
2461 | ||
3b98c0c2 | 2462 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2463 | { |
3b98c0c2 | 2464 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2465 | } |
2466 | ||
3b98c0c2 | 2467 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2468 | { |
3b98c0c2 LE |
2469 | struct drbd_conf *mdev; |
2470 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2471 | ||
2472 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2473 | if (!adm_ctx.reply_skb) | |
2474 | return retcode; | |
2475 | if (retcode != NO_ERROR) | |
2476 | goto out; | |
2477 | ||
2478 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2479 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2480 | drbd_uuid_new_current(mdev); | |
2481 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2482 | } |
265be2d0 | 2483 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2484 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2485 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2486 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2487 | tl_clear(mdev->tconn); |
265be2d0 | 2488 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2489 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2490 | } |
2491 | drbd_resume_io(mdev); | |
2492 | ||
3b98c0c2 LE |
2493 | out: |
2494 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2495 | return 0; |
2496 | } | |
2497 | ||
3b98c0c2 | 2498 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2499 | { |
3b98c0c2 | 2500 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2501 | } |
2502 | ||
543cc10b LE |
2503 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *conn_name, unsigned vnr) |
2504 | { | |
2505 | struct nlattr *nla; | |
2506 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2507 | if (!nla) | |
2508 | goto nla_put_failure; | |
2509 | if (vnr != VOLUME_UNSPECIFIED) | |
2510 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
2511 | NLA_PUT_STRING(skb, T_ctx_conn_name, conn_name); | |
2512 | nla_nest_end(skb, nla); | |
2513 | return 0; | |
2514 | ||
2515 | nla_put_failure: | |
2516 | if (nla) | |
2517 | nla_nest_cancel(skb, nla); | |
2518 | return -EMSGSIZE; | |
2519 | } | |
2520 | ||
3b98c0c2 LE |
2521 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2522 | const struct sib_info *sib) | |
b411b363 | 2523 | { |
3b98c0c2 | 2524 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
44ed167d | 2525 | struct net_conf *nc; |
3b98c0c2 LE |
2526 | struct nlattr *nla; |
2527 | int got_ldev; | |
3b98c0c2 LE |
2528 | int err = 0; |
2529 | int exclude_sensitive; | |
2530 | ||
2531 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2532 | * to. So we better exclude_sensitive information. | |
2533 | * | |
2534 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2535 | * in the context of the requesting user process. Exclude sensitive | |
2536 | * information, unless current has superuser. | |
2537 | * | |
2538 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2539 | * relies on the current implementation of netlink_dump(), which | |
2540 | * executes the dump callback successively from netlink_recvmsg(), | |
2541 | * always in the context of the receiving process */ | |
2542 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2543 | ||
2544 | got_ldev = get_ldev(mdev); | |
3b98c0c2 LE |
2545 | |
2546 | /* We need to add connection name and volume number information still. | |
2547 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2548 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2549 | goto nla_put_failure; |
3b98c0c2 | 2550 | |
f399002e LE |
2551 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2552 | goto nla_put_failure; | |
2553 | ||
3b98c0c2 LE |
2554 | if (got_ldev) |
2555 | if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive)) | |
2556 | goto nla_put_failure; | |
44ed167d PR |
2557 | |
2558 | rcu_read_lock(); | |
2559 | nc = rcu_dereference(mdev->tconn->net_conf); | |
2560 | if (nc) | |
2561 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2562 | rcu_read_unlock(); | |
2563 | if (err) | |
2564 | goto nla_put_failure; | |
3b98c0c2 | 2565 | |
3b98c0c2 LE |
2566 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2567 | if (!nla) | |
2568 | goto nla_put_failure; | |
2569 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2570 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2571 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2572 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2573 | ||
2574 | if (got_ldev) { | |
2575 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2576 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2577 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2578 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2579 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2580 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2581 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2582 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2583 | } | |
b411b363 PR |
2584 | } |
2585 | ||
3b98c0c2 LE |
2586 | if (sib) { |
2587 | switch(sib->sib_reason) { | |
2588 | case SIB_SYNC_PROGRESS: | |
2589 | case SIB_GET_STATUS_REPLY: | |
2590 | break; | |
2591 | case SIB_STATE_CHANGE: | |
2592 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2593 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2594 | break; | |
2595 | case SIB_HELPER_POST: | |
2596 | NLA_PUT_U32(skb, | |
2597 | T_helper_exit_code, sib->helper_exit_code); | |
2598 | /* fall through */ | |
2599 | case SIB_HELPER_PRE: | |
2600 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2601 | break; | |
2602 | } | |
b411b363 | 2603 | } |
3b98c0c2 | 2604 | nla_nest_end(skb, nla); |
b411b363 | 2605 | |
3b98c0c2 LE |
2606 | if (0) |
2607 | nla_put_failure: | |
2608 | err = -EMSGSIZE; | |
2609 | if (got_ldev) | |
2610 | put_ldev(mdev); | |
3b98c0c2 | 2611 | return err; |
b411b363 PR |
2612 | } |
2613 | ||
3b98c0c2 | 2614 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2615 | { |
3b98c0c2 LE |
2616 | enum drbd_ret_code retcode; |
2617 | int err; | |
b411b363 | 2618 | |
3b98c0c2 LE |
2619 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2620 | if (!adm_ctx.reply_skb) | |
2621 | return retcode; | |
2622 | if (retcode != NO_ERROR) | |
2623 | goto out; | |
b411b363 | 2624 | |
3b98c0c2 LE |
2625 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2626 | if (err) { | |
2627 | nlmsg_free(adm_ctx.reply_skb); | |
2628 | return err; | |
b411b363 | 2629 | } |
3b98c0c2 LE |
2630 | out: |
2631 | drbd_adm_finish(info, retcode); | |
2632 | return 0; | |
b411b363 PR |
2633 | } |
2634 | ||
71932efc | 2635 | int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2636 | { |
3b98c0c2 LE |
2637 | struct drbd_conf *mdev; |
2638 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2639 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2640 | struct drbd_tconn *tconn = NULL; | |
2641 | struct drbd_tconn *tmp; | |
2642 | unsigned volume = cb->args[1]; | |
2643 | ||
2644 | /* Open coded, deferred, iteration: | |
2645 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2646 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2647 | * ... | |
2648 | * } | |
2649 | * } | |
2650 | * where tconn is cb->args[0]; | |
2651 | * and i is cb->args[1]; | |
2652 | * | |
71932efc LE |
2653 | * cb->args[2] indicates if we shall loop over all resources, |
2654 | * or just dump all volumes of a single resource. | |
2655 | * | |
3b98c0c2 LE |
2656 | * This may miss entries inserted after this dump started, |
2657 | * or entries deleted before they are reached. | |
543cc10b LE |
2658 | * |
2659 | * We need to make sure the mdev won't disappear while | |
2660 | * we are looking at it, and revalidate our iterators | |
2661 | * on each iteration. | |
2662 | */ | |
3b98c0c2 | 2663 | |
9dc9fbb3 | 2664 | /* synchronize with conn_create()/conn_destroy() */ |
ef356262 | 2665 | down_read(&drbd_cfg_rwsem); |
543cc10b LE |
2666 | /* revalidate iterator position */ |
2667 | list_for_each_entry(tmp, &drbd_tconns, all_tconn) { | |
2668 | if (pos == NULL) { | |
2669 | /* first iteration */ | |
2670 | pos = tmp; | |
2671 | tconn = pos; | |
2672 | break; | |
2673 | } | |
2674 | if (tmp == pos) { | |
2675 | tconn = pos; | |
2676 | break; | |
2677 | } | |
2678 | } | |
2679 | if (tconn) { | |
71932efc | 2680 | next_tconn: |
543cc10b LE |
2681 | mdev = idr_get_next(&tconn->volumes, &volume); |
2682 | if (!mdev) { | |
2683 | /* No more volumes to dump on this tconn. | |
2684 | * Advance tconn iterator. */ | |
2685 | pos = list_entry(tconn->all_tconn.next, | |
2686 | struct drbd_tconn, all_tconn); | |
71932efc | 2687 | /* Did we dump any volume on this tconn yet? */ |
543cc10b | 2688 | if (volume != 0) { |
71932efc LE |
2689 | /* If we reached the end of the list, |
2690 | * or only a single resource dump was requested, | |
2691 | * we are done. */ | |
2692 | if (&pos->all_tconn == &drbd_tconns || cb->args[2]) | |
2693 | goto out; | |
543cc10b | 2694 | volume = 0; |
71932efc | 2695 | tconn = pos; |
543cc10b LE |
2696 | goto next_tconn; |
2697 | } | |
2698 | } | |
2699 | ||
3b98c0c2 LE |
2700 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2701 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2702 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2703 | if (!dh) | |
543cc10b LE |
2704 | goto out; |
2705 | ||
2706 | if (!mdev) { | |
2707 | /* this is a tconn without a single volume */ | |
2708 | dh->minor = -1U; | |
2709 | dh->ret_code = NO_ERROR; | |
2710 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2711 | genlmsg_cancel(skb, dh); | |
2712 | else | |
2713 | genlmsg_end(skb, dh); | |
2714 | goto out; | |
2715 | } | |
3b98c0c2 | 2716 | |
543cc10b LE |
2717 | D_ASSERT(mdev->vnr == volume); |
2718 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2719 | |
543cc10b | 2720 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2721 | dh->ret_code = NO_ERROR; |
2722 | ||
2723 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2724 | genlmsg_cancel(skb, dh); | |
543cc10b | 2725 | goto out; |
3b98c0c2 LE |
2726 | } |
2727 | genlmsg_end(skb, dh); | |
2728 | } | |
b411b363 | 2729 | |
543cc10b | 2730 | out: |
ef356262 | 2731 | up_read(&drbd_cfg_rwsem); |
543cc10b LE |
2732 | /* where to start the next iteration */ |
2733 | cb->args[0] = (long)pos; | |
2734 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2735 | |
543cc10b LE |
2736 | /* No more tconns/volumes/minors found results in an empty skb. |
2737 | * Which will terminate the dump. */ | |
3b98c0c2 | 2738 | return skb->len; |
b411b363 PR |
2739 | } |
2740 | ||
71932efc LE |
2741 | /* |
2742 | * Request status of all resources, or of all volumes within a single resource. | |
2743 | * | |
2744 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
2745 | * Which means we cannot use the family->attrbuf or other such members, because | |
2746 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
2747 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
2748 | * | |
2749 | * Once things are setup properly, we call into get_one_status(). | |
2750 | */ | |
2751 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) | |
2752 | { | |
2753 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
2754 | struct nlattr *nla; | |
2755 | const char *conn_name; | |
2756 | struct drbd_tconn *tconn; | |
2757 | ||
2758 | /* Is this a followup call? */ | |
2759 | if (cb->args[0]) { | |
2760 | /* ... of a single resource dump, | |
2761 | * and the resource iterator has been advanced already? */ | |
2762 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
2763 | return 0; /* DONE. */ | |
2764 | goto dump; | |
2765 | } | |
2766 | ||
2767 | /* First call (from netlink_dump_start). We need to figure out | |
2768 | * which resource(s) the user wants us to dump. */ | |
2769 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
2770 | nlmsg_attrlen(cb->nlh, hdrlen), | |
2771 | DRBD_NLA_CFG_CONTEXT); | |
2772 | ||
2773 | /* No explicit context given. Dump all. */ | |
2774 | if (!nla) | |
2775 | goto dump; | |
2776 | nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); | |
2777 | /* context given, but no name present? */ | |
2778 | if (!nla) | |
2779 | return -EINVAL; | |
2780 | conn_name = nla_data(nla); | |
0ace9dfa PR |
2781 | tconn = conn_get_by_name(conn_name); |
2782 | ||
71932efc LE |
2783 | if (!tconn) |
2784 | return -ENODEV; | |
2785 | ||
0ace9dfa PR |
2786 | kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */ |
2787 | ||
71932efc LE |
2788 | /* prime iterators, and set "filter" mode mark: |
2789 | * only dump this tconn. */ | |
2790 | cb->args[0] = (long)tconn; | |
2791 | /* cb->args[1] = 0; passed in this way. */ | |
2792 | cb->args[2] = (long)tconn; | |
2793 | ||
2794 | dump: | |
2795 | return get_one_status(skb, cb); | |
2796 | } | |
2797 | ||
3b98c0c2 | 2798 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2799 | { |
3b98c0c2 LE |
2800 | enum drbd_ret_code retcode; |
2801 | struct timeout_parms tp; | |
2802 | int err; | |
b411b363 | 2803 | |
3b98c0c2 LE |
2804 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2805 | if (!adm_ctx.reply_skb) | |
2806 | return retcode; | |
2807 | if (retcode != NO_ERROR) | |
2808 | goto out; | |
b411b363 | 2809 | |
3b98c0c2 LE |
2810 | tp.timeout_type = |
2811 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2812 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2813 | UT_DEFAULT; | |
b411b363 | 2814 | |
3b98c0c2 LE |
2815 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2816 | if (err) { | |
2817 | nlmsg_free(adm_ctx.reply_skb); | |
2818 | return err; | |
2819 | } | |
2820 | out: | |
2821 | drbd_adm_finish(info, retcode); | |
2822 | return 0; | |
b411b363 PR |
2823 | } |
2824 | ||
3b98c0c2 | 2825 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2826 | { |
3b98c0c2 LE |
2827 | struct drbd_conf *mdev; |
2828 | enum drbd_ret_code retcode; | |
b411b363 | 2829 | |
3b98c0c2 LE |
2830 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2831 | if (!adm_ctx.reply_skb) | |
2832 | return retcode; | |
2833 | if (retcode != NO_ERROR) | |
2834 | goto out; | |
873b0d5f | 2835 | |
3b98c0c2 LE |
2836 | mdev = adm_ctx.mdev; |
2837 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2838 | /* resume from last known position, if possible */ | |
2839 | struct start_ov_parms parms = | |
2840 | { .ov_start_sector = mdev->ov_start_sector }; | |
f399002e | 2841 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2842 | if (err) { |
2843 | retcode = ERR_MANDATORY_TAG; | |
2844 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2845 | goto out; | |
2846 | } | |
2847 | /* w_make_ov_request expects position to be aligned */ | |
2848 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2849 | } | |
873b0d5f LE |
2850 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2851 | * just being finished, wait for it before requesting a new resync. */ | |
2852 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2853 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2854 | out: | |
2855 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2856 | return 0; |
2857 | } | |
2858 | ||
2859 | ||
3b98c0c2 | 2860 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2861 | { |
3b98c0c2 LE |
2862 | struct drbd_conf *mdev; |
2863 | enum drbd_ret_code retcode; | |
b411b363 PR |
2864 | int skip_initial_sync = 0; |
2865 | int err; | |
3b98c0c2 | 2866 | struct new_c_uuid_parms args; |
b411b363 | 2867 | |
3b98c0c2 LE |
2868 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2869 | if (!adm_ctx.reply_skb) | |
2870 | return retcode; | |
2871 | if (retcode != NO_ERROR) | |
2872 | goto out_nolock; | |
b411b363 | 2873 | |
3b98c0c2 LE |
2874 | mdev = adm_ctx.mdev; |
2875 | memset(&args, 0, sizeof(args)); | |
2876 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 2877 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
2878 | if (err) { |
2879 | retcode = ERR_MANDATORY_TAG; | |
2880 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2881 | goto out_nolock; | |
2882 | } | |
b411b363 PR |
2883 | } |
2884 | ||
8410da8f | 2885 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2886 | |
2887 | if (!get_ldev(mdev)) { | |
2888 | retcode = ERR_NO_DISK; | |
2889 | goto out; | |
2890 | } | |
2891 | ||
2892 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2893 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2894 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2895 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2896 | skip_initial_sync = 1; | |
2897 | } else if (mdev->state.conn != C_STANDALONE) { | |
2898 | retcode = ERR_CONNECTED; | |
2899 | goto out_dec; | |
2900 | } | |
2901 | ||
2902 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2903 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2904 | ||
2905 | if (args.clear_bm) { | |
20ceb2b2 LE |
2906 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2907 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2908 | if (err) { |
2909 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2910 | retcode = ERR_IO_MD_DISK; | |
2911 | } | |
2912 | if (skip_initial_sync) { | |
2913 | drbd_send_uuids_skip_initial_sync(mdev); | |
2914 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2915 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2916 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2917 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2918 | CS_VERBOSE, NULL); | |
87eeee41 | 2919 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2920 | } |
2921 | } | |
2922 | ||
2923 | drbd_md_sync(mdev); | |
2924 | out_dec: | |
2925 | put_ldev(mdev); | |
2926 | out: | |
8410da8f | 2927 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2928 | out_nolock: |
2929 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2930 | return 0; |
2931 | } | |
2932 | ||
3b98c0c2 LE |
2933 | static enum drbd_ret_code |
2934 | drbd_check_conn_name(const char *name) | |
774b3055 | 2935 | { |
3b98c0c2 LE |
2936 | if (!name || !name[0]) { |
2937 | drbd_msg_put_info("connection name missing"); | |
2938 | return ERR_MANDATORY_TAG; | |
774b3055 | 2939 | } |
3b98c0c2 LE |
2940 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2941 | * we must not allow slashes */ | |
2942 | if (strchr(name, '/')) { | |
2943 | drbd_msg_put_info("invalid connection name"); | |
2944 | return ERR_INVALID_REQUEST; | |
774b3055 | 2945 | } |
3b98c0c2 | 2946 | return NO_ERROR; |
774b3055 PR |
2947 | } |
2948 | ||
3b98c0c2 | 2949 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2950 | { |
3b98c0c2 | 2951 | enum drbd_ret_code retcode; |
9f5180e5 | 2952 | |
3b98c0c2 LE |
2953 | retcode = drbd_adm_prepare(skb, info, 0); |
2954 | if (!adm_ctx.reply_skb) | |
2955 | return retcode; | |
2956 | if (retcode != NO_ERROR) | |
2957 | goto out; | |
b411b363 | 2958 | |
3b98c0c2 LE |
2959 | retcode = drbd_check_conn_name(adm_ctx.conn_name); |
2960 | if (retcode != NO_ERROR) | |
2961 | goto out; | |
b411b363 | 2962 | |
3b98c0c2 | 2963 | if (adm_ctx.tconn) { |
38f19616 LE |
2964 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2965 | retcode = ERR_INVALID_REQUEST; | |
2966 | drbd_msg_put_info("connection exists"); | |
2967 | } | |
2968 | /* else: still NO_ERROR */ | |
3b98c0c2 | 2969 | goto out; |
b411b363 PR |
2970 | } |
2971 | ||
9dc9fbb3 | 2972 | if (!conn_create(adm_ctx.conn_name)) |
b411b363 | 2973 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
2974 | out: |
2975 | drbd_adm_finish(info, retcode); | |
2976 | return 0; | |
b411b363 PR |
2977 | } |
2978 | ||
3b98c0c2 | 2979 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2980 | { |
3b98c0c2 LE |
2981 | struct drbd_genlmsghdr *dh = info->userhdr; |
2982 | enum drbd_ret_code retcode; | |
b411b363 | 2983 | |
3b98c0c2 LE |
2984 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2985 | if (!adm_ctx.reply_skb) | |
2986 | return retcode; | |
2987 | if (retcode != NO_ERROR) | |
2988 | goto out; | |
b411b363 | 2989 | |
3b98c0c2 LE |
2990 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
2991 | if (dh->minor >= minor_count) { | |
2992 | drbd_msg_put_info("requested minor out of range"); | |
2993 | retcode = ERR_INVALID_REQUEST; | |
2994 | goto out; | |
b411b363 | 2995 | } |
0c8e36d9 | 2996 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
2997 | drbd_msg_put_info("requested volume id out of range"); |
2998 | retcode = ERR_INVALID_REQUEST; | |
2999 | goto out; | |
b411b363 | 3000 | } |
b411b363 | 3001 | |
38f19616 LE |
3002 | /* drbd_adm_prepare made sure already |
3003 | * that mdev->tconn and mdev->vnr match the request. */ | |
3004 | if (adm_ctx.mdev) { | |
3005 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
3006 | retcode = ERR_MINOR_EXISTS; | |
3007 | /* else: still NO_ERROR */ | |
3008 | goto out; | |
3009 | } | |
3010 | ||
d3fcb490 | 3011 | down_write(&drbd_cfg_rwsem); |
3b98c0c2 | 3012 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
d3fcb490 | 3013 | up_write(&drbd_cfg_rwsem); |
3b98c0c2 LE |
3014 | out: |
3015 | drbd_adm_finish(info, retcode); | |
3016 | return 0; | |
b411b363 PR |
3017 | } |
3018 | ||
85f75dd7 LE |
3019 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
3020 | { | |
3021 | if (mdev->state.disk == D_DISKLESS && | |
3022 | /* no need to be mdev->state.conn == C_STANDALONE && | |
3023 | * we may want to delete a minor from a live replication group. | |
3024 | */ | |
3025 | mdev->state.role == R_SECONDARY) { | |
ff370e5a | 3026 | drbd_delete_device(mdev); |
85f75dd7 LE |
3027 | return NO_ERROR; |
3028 | } else | |
3029 | return ERR_MINOR_CONFIGURED; | |
3030 | } | |
3031 | ||
3b98c0c2 | 3032 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3033 | { |
3b98c0c2 | 3034 | enum drbd_ret_code retcode; |
b411b363 | 3035 | |
3b98c0c2 LE |
3036 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
3037 | if (!adm_ctx.reply_skb) | |
3038 | return retcode; | |
3039 | if (retcode != NO_ERROR) | |
3040 | goto out; | |
b411b363 | 3041 | |
ef356262 | 3042 | down_write(&drbd_cfg_rwsem); |
85f75dd7 | 3043 | retcode = adm_delete_minor(adm_ctx.mdev); |
ef356262 | 3044 | up_write(&drbd_cfg_rwsem); |
85f75dd7 LE |
3045 | out: |
3046 | drbd_adm_finish(info, retcode); | |
3047 | return 0; | |
3048 | } | |
3049 | ||
3050 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
3051 | { | |
3052 | enum drbd_ret_code retcode; | |
3053 | enum drbd_state_rv rv; | |
3054 | struct drbd_conf *mdev; | |
3055 | unsigned i; | |
3056 | ||
3057 | retcode = drbd_adm_prepare(skb, info, 0); | |
3058 | if (!adm_ctx.reply_skb) | |
3059 | return retcode; | |
3060 | if (retcode != NO_ERROR) | |
3061 | goto out; | |
3062 | ||
3063 | if (!adm_ctx.tconn) { | |
3064 | retcode = ERR_CONN_NOT_KNOWN; | |
3065 | goto out; | |
3066 | } | |
3067 | ||
ef356262 | 3068 | down_read(&drbd_cfg_rwsem); |
85f75dd7 LE |
3069 | /* demote */ |
3070 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3071 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
3072 | if (retcode < SS_SUCCESS) { | |
3073 | drbd_msg_put_info("failed to demote"); | |
3074 | goto out_unlock; | |
3075 | } | |
3076 | } | |
3077 | ||
3078 | /* disconnect */ | |
3079 | rv = conn_try_disconnect(adm_ctx.tconn, 0); | |
3080 | if (rv < SS_SUCCESS) { | |
3081 | retcode = rv; /* enum type mismatch! */ | |
3082 | drbd_msg_put_info("failed to disconnect"); | |
3083 | goto out_unlock; | |
3084 | } | |
3085 | ||
d9cc6e23 LE |
3086 | /* Make sure the network threads have actually stopped, |
3087 | * state handling only does drbd_thread_stop_nowait(). */ | |
3088 | drbd_thread_stop(&adm_ctx.tconn->receiver); | |
3089 | ||
85f75dd7 LE |
3090 | /* detach */ |
3091 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3092 | rv = adm_detach(mdev); | |
3093 | if (rv < SS_SUCCESS) { | |
3094 | retcode = rv; /* enum type mismatch! */ | |
3095 | drbd_msg_put_info("failed to detach"); | |
3096 | goto out_unlock; | |
3097 | } | |
3098 | } | |
ef356262 | 3099 | up_read(&drbd_cfg_rwsem); |
85f75dd7 LE |
3100 | |
3101 | /* delete volumes */ | |
ef356262 | 3102 | down_write(&drbd_cfg_rwsem); |
85f75dd7 LE |
3103 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { |
3104 | retcode = adm_delete_minor(mdev); | |
3105 | if (retcode != NO_ERROR) { | |
3106 | /* "can not happen" */ | |
3107 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 PR |
3108 | up_write(&drbd_cfg_rwsem); |
3109 | goto out; | |
85f75dd7 LE |
3110 | } |
3111 | } | |
3112 | ||
85f75dd7 LE |
3113 | /* delete connection */ |
3114 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
d9cc6e23 | 3115 | drbd_thread_stop(&adm_ctx.tconn->worker); |
9dc9fbb3 PR |
3116 | list_del(&adm_ctx.tconn->all_tconn); |
3117 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
3118 | ||
85f75dd7 LE |
3119 | retcode = NO_ERROR; |
3120 | } else { | |
3121 | /* "can not happen" */ | |
3122 | retcode = ERR_CONN_IN_USE; | |
3123 | drbd_msg_put_info("failed to delete connection"); | |
85f75dd7 | 3124 | } |
ef356262 PR |
3125 | |
3126 | up_write(&drbd_cfg_rwsem); | |
3127 | goto out; | |
85f75dd7 | 3128 | out_unlock: |
ef356262 | 3129 | up_read(&drbd_cfg_rwsem); |
3b98c0c2 LE |
3130 | out: |
3131 | drbd_adm_finish(info, retcode); | |
3132 | return 0; | |
b411b363 PR |
3133 | } |
3134 | ||
3b98c0c2 | 3135 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3136 | { |
3b98c0c2 | 3137 | enum drbd_ret_code retcode; |
b411b363 | 3138 | |
3b98c0c2 LE |
3139 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3140 | if (!adm_ctx.reply_skb) | |
3141 | return retcode; | |
3142 | if (retcode != NO_ERROR) | |
3143 | goto out; | |
3144 | ||
ef356262 | 3145 | down_write(&drbd_cfg_rwsem); |
3b98c0c2 | 3146 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { |
9dc9fbb3 PR |
3147 | list_del(&adm_ctx.tconn->all_tconn); |
3148 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
3149 | ||
3b98c0c2 LE |
3150 | retcode = NO_ERROR; |
3151 | } else { | |
3152 | retcode = ERR_CONN_IN_USE; | |
b411b363 | 3153 | } |
ef356262 | 3154 | up_write(&drbd_cfg_rwsem); |
b411b363 | 3155 | |
3b98c0c2 LE |
3156 | out: |
3157 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3158 | return 0; |
3159 | } | |
3160 | ||
3b98c0c2 | 3161 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3162 | { |
3b98c0c2 LE |
3163 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3164 | struct sk_buff *msg; | |
3165 | struct drbd_genlmsghdr *d_out; | |
3166 | unsigned seq; | |
3167 | int err = -ENOMEM; | |
3168 | ||
3169 | seq = atomic_inc_return(&drbd_genl_seq); | |
3170 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3171 | if (!msg) | |
3172 | goto failed; | |
3173 | ||
3174 | err = -EMSGSIZE; | |
3175 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3176 | if (!d_out) /* cannot happen, but anyways. */ | |
3177 | goto nla_put_failure; | |
3178 | d_out->minor = mdev_to_minor(mdev); | |
3179 | d_out->ret_code = 0; | |
3180 | ||
3181 | if (nla_put_status_info(msg, mdev, sib)) | |
3182 | goto nla_put_failure; | |
3183 | genlmsg_end(msg, d_out); | |
3184 | err = drbd_genl_multicast_events(msg, 0); | |
3185 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3186 | if (err && err != -ESRCH) | |
3187 | goto failed; | |
b411b363 | 3188 | |
3b98c0c2 | 3189 | return; |
b411b363 | 3190 | |
3b98c0c2 LE |
3191 | nla_put_failure: |
3192 | nlmsg_free(msg); | |
3193 | failed: | |
3194 | dev_err(DEV, "Error %d while broadcasting event. " | |
3195 | "Event seq:%u sib_reason:%u\n", | |
3196 | err, seq, sib->sib_reason); | |
b411b363 | 3197 | } |