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Commit | Line | Data |
---|---|---|
b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
265be2d0 | 35 | #include "drbd_req.h" |
b411b363 PR |
36 | #include "drbd_wrappers.h" |
37 | #include <asm/unaligned.h> | |
b411b363 | 38 | #include <linux/drbd_limits.h> |
87f7be4c | 39 | #include <linux/kthread.h> |
b411b363 | 40 | |
3b98c0c2 LE |
41 | #include <net/genetlink.h> |
42 | ||
43 | /* .doit */ | |
44 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
45 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
46 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
789c1b62 AG |
50 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info); |
51 | int drbd_adm_del_resource(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> | |
01b39b50 | 78 | #include "drbd_nla.h" |
3b98c0c2 LE |
79 | #include <linux/genl_magic_func.h> |
80 | ||
81 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
82 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
83 | ||
3b98c0c2 LE |
84 | /* Configuration is strictly serialized, because generic netlink message |
85 | * processing is strictly serialized by the genl_lock(). | |
86 | * Which means we can use one static global drbd_config_context struct. | |
87 | */ | |
88 | static struct drbd_config_context { | |
89 | /* assigned from drbd_genlmsghdr */ | |
90 | unsigned int minor; | |
91 | /* assigned from request attributes, if present */ | |
92 | unsigned int volume; | |
93 | #define VOLUME_UNSPECIFIED (-1U) | |
94 | /* pointer into the request skb, | |
95 | * limited lifetime! */ | |
7c3063cc | 96 | char *resource_name; |
3b98c0c2 LE |
97 | |
98 | /* reply buffer */ | |
99 | struct sk_buff *reply_skb; | |
100 | /* pointer into reply buffer */ | |
101 | struct drbd_genlmsghdr *reply_dh; | |
102 | /* resolved from attributes, if possible */ | |
103 | struct drbd_conf *mdev; | |
104 | struct drbd_tconn *tconn; | |
105 | } adm_ctx; | |
106 | ||
107 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
108 | { | |
109 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
110 | if (genlmsg_reply(skb, info)) | |
111 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 112 | } |
3b98c0c2 LE |
113 | |
114 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
115 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 116 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
117 | { |
118 | struct sk_buff *skb = adm_ctx.reply_skb; | |
119 | struct nlattr *nla; | |
120 | int err = -EMSGSIZE; | |
121 | ||
122 | if (!info || !info[0]) | |
123 | return 0; | |
124 | ||
125 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
126 | if (!nla) | |
127 | return err; | |
128 | ||
129 | err = nla_put_string(skb, T_info_text, info); | |
130 | if (err) { | |
131 | nla_nest_cancel(skb, nla); | |
132 | return err; | |
133 | } else | |
134 | nla_nest_end(skb, nla); | |
135 | return 0; | |
b411b363 PR |
136 | } |
137 | ||
3b98c0c2 LE |
138 | /* This would be a good candidate for a "pre_doit" hook, |
139 | * and per-family private info->pointers. | |
140 | * But we need to stay compatible with older kernels. | |
141 | * If it returns successfully, adm_ctx members are valid. | |
142 | */ | |
143 | #define DRBD_ADM_NEED_MINOR 1 | |
144 | #define DRBD_ADM_NEED_CONN 2 | |
145 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, | |
146 | unsigned flags) | |
147 | { | |
148 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
149 | const u8 cmd = info->genlhdr->cmd; | |
150 | int err; | |
151 | ||
152 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
153 | ||
154 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
155 | if (cmd != DRBD_ADM_GET_STATUS | |
156 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
157 | return -EPERM; | |
158 | ||
159 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1e2a2551 AG |
160 | if (!adm_ctx.reply_skb) { |
161 | err = -ENOMEM; | |
3b98c0c2 | 162 | goto fail; |
1e2a2551 | 163 | } |
3b98c0c2 LE |
164 | |
165 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
166 | info, &drbd_genl_family, 0, cmd); | |
167 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
168 | * but anyways */ | |
1e2a2551 AG |
169 | if (!adm_ctx.reply_dh) { |
170 | err = -ENOMEM; | |
3b98c0c2 | 171 | goto fail; |
1e2a2551 | 172 | } |
3b98c0c2 LE |
173 | |
174 | adm_ctx.reply_dh->minor = d_in->minor; | |
175 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
176 | ||
177 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { | |
178 | struct nlattr *nla; | |
179 | /* parse and validate only */ | |
f399002e | 180 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
181 | if (err) |
182 | goto fail; | |
183 | ||
184 | /* It was present, and valid, | |
185 | * copy it over to the reply skb. */ | |
186 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
187 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
188 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
189 | if (err) | |
190 | goto fail; | |
191 | ||
192 | /* and assign stuff to the global adm_ctx */ | |
193 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
194 | adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; | |
7c3063cc | 195 | nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
3b98c0c2 | 196 | if (nla) |
7c3063cc | 197 | adm_ctx.resource_name = nla_data(nla); |
3b98c0c2 LE |
198 | } else |
199 | adm_ctx.volume = VOLUME_UNSPECIFIED; | |
200 | ||
201 | adm_ctx.minor = d_in->minor; | |
202 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
7c3063cc | 203 | adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name); |
3b98c0c2 LE |
204 | |
205 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
206 | drbd_msg_put_info("unknown minor"); | |
207 | return ERR_MINOR_INVALID; | |
208 | } | |
209 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { | |
210 | drbd_msg_put_info("unknown connection"); | |
211 | return ERR_INVALID_REQUEST; | |
212 | } | |
213 | ||
214 | /* some more paranoia, if the request was over-determined */ | |
527f4b24 LE |
215 | if (adm_ctx.mdev && adm_ctx.tconn && |
216 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
217 | pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", | |
7c3063cc AG |
218 | adm_ctx.minor, adm_ctx.resource_name, |
219 | adm_ctx.mdev->tconn->name); | |
527f4b24 LE |
220 | drbd_msg_put_info("minor exists in different connection"); |
221 | return ERR_INVALID_REQUEST; | |
222 | } | |
3b98c0c2 LE |
223 | if (adm_ctx.mdev && |
224 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
225 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
226 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
227 | adm_ctx.minor, adm_ctx.volume, | |
228 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 229 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
230 | return ERR_INVALID_REQUEST; |
231 | } | |
0ace9dfa | 232 | |
3b98c0c2 LE |
233 | return NO_ERROR; |
234 | ||
235 | fail: | |
236 | nlmsg_free(adm_ctx.reply_skb); | |
237 | adm_ctx.reply_skb = NULL; | |
1e2a2551 | 238 | return err; |
3b98c0c2 LE |
239 | } |
240 | ||
241 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
242 | { | |
243 | struct nlattr *nla; | |
7c3063cc | 244 | const char *resource_name = NULL; |
3b98c0c2 | 245 | |
0ace9dfa PR |
246 | if (adm_ctx.tconn) { |
247 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
248 | adm_ctx.tconn = NULL; | |
249 | } | |
250 | ||
3b98c0c2 LE |
251 | if (!adm_ctx.reply_skb) |
252 | return -ENOMEM; | |
253 | ||
254 | adm_ctx.reply_dh->ret_code = retcode; | |
255 | ||
256 | nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; | |
257 | if (nla) { | |
7c3063cc AG |
258 | int maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
259 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
260 | if (nla && !IS_ERR(nla)) | |
261 | resource_name = nla_data(nla); | |
3b98c0c2 LE |
262 | } |
263 | ||
264 | drbd_adm_send_reply(adm_ctx.reply_skb, info); | |
265 | return 0; | |
266 | } | |
b411b363 | 267 | |
6b75dced | 268 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 269 | { |
6b75dced | 270 | char *afs; |
44ed167d | 271 | struct net_conf *nc; |
b411b363 | 272 | |
44ed167d PR |
273 | rcu_read_lock(); |
274 | nc = rcu_dereference(tconn->net_conf); | |
275 | if (nc) { | |
276 | switch (((struct sockaddr *)nc->peer_addr)->sa_family) { | |
b411b363 PR |
277 | case AF_INET6: |
278 | afs = "ipv6"; | |
6b75dced | 279 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
44ed167d | 280 | &((struct sockaddr_in6 *)nc->peer_addr)->sin6_addr); |
b411b363 PR |
281 | break; |
282 | case AF_INET: | |
283 | afs = "ipv4"; | |
6b75dced | 284 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 285 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 PR |
286 | break; |
287 | default: | |
288 | afs = "ssocks"; | |
6b75dced | 289 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 290 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 | 291 | } |
6b75dced | 292 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
b411b363 | 293 | } |
44ed167d | 294 | rcu_read_unlock(); |
6b75dced PR |
295 | } |
296 | ||
297 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
298 | { | |
299 | char *envp[] = { "HOME=/", | |
300 | "TERM=linux", | |
301 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
302 | (char[20]) { }, /* address family */ | |
303 | (char[60]) { }, /* address */ | |
304 | NULL }; | |
305 | char mb[12]; | |
306 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
307 | struct sib_info sib; | |
308 | int ret; | |
309 | ||
310 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
311 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 312 | |
1090c056 LE |
313 | /* The helper may take some time. |
314 | * write out any unsynced meta data changes now */ | |
315 | drbd_md_sync(mdev); | |
316 | ||
b411b363 | 317 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
318 | sib.sib_reason = SIB_HELPER_PRE; |
319 | sib.helper_name = cmd; | |
320 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
321 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
322 | if (ret) | |
323 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
324 | usermode_helper, cmd, mb, | |
325 | (ret >> 8) & 0xff, ret); | |
326 | else | |
327 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
328 | usermode_helper, cmd, mb, | |
329 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
330 | sib.sib_reason = SIB_HELPER_POST; |
331 | sib.helper_exit_code = ret; | |
332 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
333 | |
334 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
335 | ret = 0; | |
336 | ||
337 | return ret; | |
338 | } | |
339 | ||
6b75dced PR |
340 | static void conn_md_sync(struct drbd_tconn *tconn) |
341 | { | |
342 | struct drbd_conf *mdev; | |
e90285e0 | 343 | int vnr; |
6b75dced | 344 | |
c141ebda PR |
345 | rcu_read_lock(); |
346 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
347 | kref_get(&mdev->kref); | |
348 | rcu_read_unlock(); | |
6b75dced | 349 | drbd_md_sync(mdev); |
c141ebda PR |
350 | kref_put(&mdev->kref, &drbd_minor_destroy); |
351 | rcu_read_lock(); | |
352 | } | |
353 | rcu_read_unlock(); | |
6b75dced PR |
354 | } |
355 | ||
356 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
357 | { | |
358 | char *envp[] = { "HOME=/", | |
359 | "TERM=linux", | |
360 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
361 | (char[20]) { }, /* address family */ | |
362 | (char[60]) { }, /* address */ | |
363 | NULL }; | |
364 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
365 | int ret; | |
366 | ||
367 | setup_khelper_env(tconn, envp); | |
368 | conn_md_sync(tconn); | |
369 | ||
370 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
371 | /* TODO: conn_bcast_event() ?? */ | |
372 | ||
373 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
374 | if (ret) | |
375 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
376 | usermode_helper, cmd, tconn->name, | |
377 | (ret >> 8) & 0xff, ret); | |
378 | else | |
379 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
380 | usermode_helper, cmd, tconn->name, | |
381 | (ret >> 8) & 0xff, ret); | |
382 | /* TODO: conn_bcast_event() ?? */ | |
383 | ||
384 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
385 | ret = 0; | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
cb703454 | 390 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 391 | { |
cb703454 PR |
392 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
393 | struct drbd_conf *mdev; | |
394 | int vnr; | |
395 | ||
695d08fa | 396 | rcu_read_lock(); |
cb703454 PR |
397 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
398 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
daeda1cc PR |
399 | fp = max_t(enum drbd_fencing_p, fp, |
400 | rcu_dereference(mdev->ldev->disk_conf)->fencing); | |
cb703454 PR |
401 | put_ldev(mdev); |
402 | } | |
403 | } | |
695d08fa | 404 | rcu_read_unlock(); |
cb703454 PR |
405 | |
406 | return fp; | |
407 | } | |
408 | ||
409 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
410 | { | |
411 | union drbd_state mask = { }; | |
412 | union drbd_state val = { }; | |
413 | enum drbd_fencing_p fp; | |
b411b363 PR |
414 | char *ex_to_string; |
415 | int r; | |
b411b363 | 416 | |
cb703454 PR |
417 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
418 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
419 | return false; | |
420 | } | |
b411b363 | 421 | |
cb703454 PR |
422 | fp = highest_fencing_policy(tconn); |
423 | switch (fp) { | |
424 | case FP_NOT_AVAIL: | |
425 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 426 | goto out; |
cb703454 PR |
427 | case FP_DONT_CARE: |
428 | return true; | |
429 | default: ; | |
b411b363 PR |
430 | } |
431 | ||
cb703454 | 432 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
433 | |
434 | switch ((r>>8) & 0xff) { | |
435 | case 3: /* peer is inconsistent */ | |
436 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
437 | mask.pdsk = D_MASK; |
438 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
439 | break; |
440 | case 4: /* peer got outdated, or was already outdated */ | |
441 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
442 | mask.pdsk = D_MASK; |
443 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
444 | break; |
445 | case 5: /* peer was down */ | |
cb703454 | 446 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
447 | /* we will(have) create(d) a new UUID anyways... */ |
448 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
449 | mask.pdsk = D_MASK; |
450 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
451 | } else { |
452 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
453 | } |
454 | break; | |
455 | case 6: /* Peer is primary, voluntarily outdate myself. | |
456 | * This is useful when an unconnected R_SECONDARY is asked to | |
457 | * become R_PRIMARY, but finds the other peer being active. */ | |
458 | ex_to_string = "peer is active"; | |
cb703454 PR |
459 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
460 | mask.disk = D_MASK; | |
461 | val.disk = D_OUTDATED; | |
b411b363 PR |
462 | break; |
463 | case 7: | |
464 | if (fp != FP_STONITH) | |
cb703454 | 465 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 466 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
467 | mask.pdsk = D_MASK; |
468 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
469 | break; |
470 | default: | |
471 | /* The script is broken ... */ | |
cb703454 PR |
472 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
473 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
474 | } |
475 | ||
cb703454 PR |
476 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
477 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 478 | |
cb703454 | 479 | out: |
fb22c402 | 480 | |
cb703454 PR |
481 | /* Not using |
482 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
483 | here, because we might were able to re-establish the connection in the | |
484 | meantime. */ | |
485 | spin_lock_irq(&tconn->req_lock); | |
486 | if (tconn->cstate < C_WF_REPORT_PARAMS) | |
487 | _conn_request_state(tconn, mask, val, CS_VERBOSE); | |
488 | spin_unlock_irq(&tconn->req_lock); | |
489 | ||
490 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
491 | } |
492 | ||
87f7be4c PR |
493 | static int _try_outdate_peer_async(void *data) |
494 | { | |
cb703454 | 495 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 496 | |
cb703454 | 497 | conn_try_outdate_peer(tconn); |
87f7be4c | 498 | |
9dc9fbb3 | 499 | kref_put(&tconn->kref, &conn_destroy); |
87f7be4c PR |
500 | return 0; |
501 | } | |
502 | ||
cb703454 | 503 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
504 | { |
505 | struct task_struct *opa; | |
506 | ||
9dc9fbb3 | 507 | kref_get(&tconn->kref); |
cb703454 | 508 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
9dc9fbb3 | 509 | if (IS_ERR(opa)) { |
cb703454 | 510 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
9dc9fbb3 PR |
511 | kref_put(&tconn->kref, &conn_destroy); |
512 | } | |
87f7be4c | 513 | } |
b411b363 | 514 | |
bf885f8a AG |
515 | enum drbd_state_rv |
516 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
517 | { |
518 | const int max_tries = 4; | |
bf885f8a | 519 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 520 | struct net_conf *nc; |
b411b363 PR |
521 | int try = 0; |
522 | int forced = 0; | |
523 | union drbd_state mask, val; | |
b411b363 PR |
524 | |
525 | if (new_role == R_PRIMARY) | |
0625ac19 | 526 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 527 | |
8410da8f | 528 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
529 | |
530 | mask.i = 0; mask.role = R_MASK; | |
531 | val.i = 0; val.role = new_role; | |
532 | ||
533 | while (try++ < max_tries) { | |
bf885f8a | 534 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
535 | |
536 | /* in case we first succeeded to outdate, | |
537 | * but now suddenly could establish a connection */ | |
bf885f8a | 538 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
539 | val.pdsk = 0; |
540 | mask.pdsk = 0; | |
541 | continue; | |
542 | } | |
543 | ||
bf885f8a | 544 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
545 | (mdev->state.disk < D_UP_TO_DATE && |
546 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
547 | mask.disk = D_MASK; |
548 | val.disk = D_UP_TO_DATE; | |
549 | forced = 1; | |
550 | continue; | |
551 | } | |
552 | ||
bf885f8a | 553 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
554 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
555 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 556 | |
cb703454 | 557 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
558 | val.disk = D_UP_TO_DATE; |
559 | mask.disk = D_MASK; | |
560 | } | |
b411b363 PR |
561 | continue; |
562 | } | |
563 | ||
bf885f8a | 564 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 565 | goto out; |
bf885f8a | 566 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 567 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 568 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
569 | mask.pdsk = D_MASK; |
570 | val.pdsk = D_OUTDATED; | |
b411b363 | 571 | |
cb703454 | 572 | } |
b411b363 PR |
573 | continue; |
574 | } | |
bf885f8a | 575 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
576 | /* Maybe the peer is detected as dead very soon... |
577 | retry at most once more in this case. */ | |
44ed167d PR |
578 | int timeo; |
579 | rcu_read_lock(); | |
580 | nc = rcu_dereference(mdev->tconn->net_conf); | |
581 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
582 | rcu_read_unlock(); | |
583 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
584 | if (try < max_tries) |
585 | try = max_tries - 1; | |
586 | continue; | |
587 | } | |
bf885f8a AG |
588 | if (rv < SS_SUCCESS) { |
589 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 590 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 591 | if (rv < SS_SUCCESS) |
3b98c0c2 | 592 | goto out; |
b411b363 PR |
593 | } |
594 | break; | |
595 | } | |
596 | ||
bf885f8a | 597 | if (rv < SS_SUCCESS) |
3b98c0c2 | 598 | goto out; |
b411b363 PR |
599 | |
600 | if (forced) | |
601 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
602 | ||
603 | /* Wait until nothing is on the fly :) */ | |
604 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
605 | ||
606 | if (new_role == R_SECONDARY) { | |
81e84650 | 607 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
608 | if (get_ldev(mdev)) { |
609 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
610 | put_ldev(mdev); | |
611 | } | |
612 | } else { | |
a0095508 | 613 | mutex_lock(&mdev->tconn->conf_update); |
91fd4dad | 614 | nc = mdev->tconn->net_conf; |
44ed167d | 615 | if (nc) |
6139f60d | 616 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
a0095508 | 617 | mutex_unlock(&mdev->tconn->conf_update); |
91fd4dad | 618 | |
81e84650 | 619 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
620 | if (get_ldev(mdev)) { |
621 | if (((mdev->state.conn < C_CONNECTED || | |
622 | mdev->state.pdsk <= D_FAILED) | |
623 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
624 | drbd_uuid_new_current(mdev); | |
625 | ||
626 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
627 | put_ldev(mdev); | |
628 | } | |
629 | } | |
630 | ||
19f843aa LE |
631 | /* writeout of activity log covered areas of the bitmap |
632 | * to stable storage done in after state change already */ | |
b411b363 PR |
633 | |
634 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
635 | /* if this was forced, we should consider sync */ | |
636 | if (forced) | |
637 | drbd_send_uuids(mdev); | |
638 | drbd_send_state(mdev); | |
639 | } | |
640 | ||
641 | drbd_md_sync(mdev); | |
642 | ||
643 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 644 | out: |
8410da8f | 645 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 646 | return rv; |
b411b363 PR |
647 | } |
648 | ||
3b98c0c2 | 649 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 650 | { |
3b98c0c2 LE |
651 | return err == -ENOMSG ? "required attribute missing" : |
652 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 653 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 654 | "invalid attribute value"; |
b411b363 PR |
655 | } |
656 | ||
3b98c0c2 | 657 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 658 | { |
3b98c0c2 LE |
659 | struct set_role_parms parms; |
660 | int err; | |
661 | enum drbd_ret_code retcode; | |
b411b363 | 662 | |
3b98c0c2 LE |
663 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
664 | if (!adm_ctx.reply_skb) | |
665 | return retcode; | |
666 | if (retcode != NO_ERROR) | |
667 | goto out; | |
668 | ||
669 | memset(&parms, 0, sizeof(parms)); | |
670 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 671 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
672 | if (err) { |
673 | retcode = ERR_MANDATORY_TAG; | |
674 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
675 | goto out; | |
676 | } | |
677 | } | |
678 | ||
679 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
680 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
681 | else | |
682 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
683 | out: | |
684 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
685 | return 0; |
686 | } | |
687 | ||
688 | /* initializes the md.*_offset members, so we are able to find | |
689 | * the on disk meta data */ | |
690 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
691 | struct drbd_backing_dev *bdev) | |
692 | { | |
693 | sector_t md_size_sect = 0; | |
daeda1cc PR |
694 | int meta_dev_idx; |
695 | ||
696 | rcu_read_lock(); | |
697 | meta_dev_idx = rcu_dereference(bdev->disk_conf)->meta_dev_idx; | |
698 | ||
699 | switch (meta_dev_idx) { | |
b411b363 PR |
700 | default: |
701 | /* v07 style fixed size indexed meta data */ | |
702 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
703 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
704 | bdev->md.al_offset = MD_AL_OFFSET; | |
705 | bdev->md.bm_offset = MD_BM_OFFSET; | |
706 | break; | |
707 | case DRBD_MD_INDEX_FLEX_EXT: | |
708 | /* just occupy the full device; unit: sectors */ | |
709 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
710 | bdev->md.md_offset = 0; | |
711 | bdev->md.al_offset = MD_AL_OFFSET; | |
712 | bdev->md.bm_offset = MD_BM_OFFSET; | |
713 | break; | |
714 | case DRBD_MD_INDEX_INTERNAL: | |
715 | case DRBD_MD_INDEX_FLEX_INT: | |
716 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
717 | /* al size is still fixed */ | |
7ad651b5 | 718 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
719 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
720 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
721 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
722 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
723 | md_size_sect = ALIGN(md_size_sect, 8); | |
724 | ||
725 | /* plus the "drbd meta data super block", | |
726 | * and the activity log; */ | |
727 | md_size_sect += MD_BM_OFFSET; | |
728 | ||
729 | bdev->md.md_size_sect = md_size_sect; | |
730 | /* bitmap offset is adjusted by 'super' block size */ | |
731 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
732 | break; | |
733 | } | |
daeda1cc | 734 | rcu_read_unlock(); |
b411b363 PR |
735 | } |
736 | ||
4b0715f0 | 737 | /* input size is expected to be in KB */ |
b411b363 PR |
738 | char *ppsize(char *buf, unsigned long long size) |
739 | { | |
4b0715f0 LE |
740 | /* Needs 9 bytes at max including trailing NUL: |
741 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
742 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
743 | int base = 0; | |
4b0715f0 | 744 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
745 | /* shift + round */ |
746 | size = (size >> 10) + !!(size & (1<<9)); | |
747 | base++; | |
748 | } | |
4b0715f0 | 749 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
750 | |
751 | return buf; | |
752 | } | |
753 | ||
754 | /* there is still a theoretical deadlock when called from receiver | |
755 | * on an D_INCONSISTENT R_PRIMARY: | |
756 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
757 | * packet from remote to dec_ap_bio again. | |
758 | * receiver receive_sizes(), comes here, | |
759 | * waits for ap_bio_cnt == 0. -> deadlock. | |
760 | * but this cannot happen, actually, because: | |
761 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
762 | * (not connected, or bad/no disk on peer): | |
763 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
764 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
765 | * peer may not initiate a resize. | |
766 | */ | |
3b98c0c2 LE |
767 | /* Note these are not to be confused with |
768 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
769 | * which are (sub) state changes triggered by admin (drbdsetup), | |
770 | * and can be long lived. | |
771 | * This changes an mdev->flag, is triggered by drbd internals, | |
772 | * and should be short-lived. */ | |
b411b363 PR |
773 | void drbd_suspend_io(struct drbd_conf *mdev) |
774 | { | |
775 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 776 | if (drbd_suspended(mdev)) |
265be2d0 | 777 | return; |
b411b363 PR |
778 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
779 | } | |
780 | ||
781 | void drbd_resume_io(struct drbd_conf *mdev) | |
782 | { | |
783 | clear_bit(SUSPEND_IO, &mdev->flags); | |
784 | wake_up(&mdev->misc_wait); | |
785 | } | |
786 | ||
787 | /** | |
788 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
789 | * @mdev: DRBD device. | |
790 | * | |
791 | * Returns 0 on success, negative return values indicate errors. | |
792 | * You should call drbd_md_sync() after calling this function. | |
793 | */ | |
24c4830c | 794 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
795 | { |
796 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
ef5e44a6 | 797 | sector_t la_size, u_size; |
b411b363 PR |
798 | sector_t size; |
799 | char ppb[10]; | |
800 | ||
801 | int md_moved, la_size_changed; | |
802 | enum determine_dev_size rv = unchanged; | |
803 | ||
804 | /* race: | |
805 | * application request passes inc_ap_bio, | |
806 | * but then cannot get an AL-reference. | |
807 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
808 | * | |
809 | * to avoid that: | |
810 | * Suspend IO right here. | |
811 | * still lock the act_log to not trigger ASSERTs there. | |
812 | */ | |
813 | drbd_suspend_io(mdev); | |
814 | ||
815 | /* no wait necessary anymore, actually we could assert that */ | |
816 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
817 | ||
818 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
819 | prev_size = mdev->ldev->md.md_size_sect; | |
820 | la_size = mdev->ldev->md.la_size_sect; | |
821 | ||
822 | /* TODO: should only be some assert here, not (re)init... */ | |
823 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
824 | ||
daeda1cc PR |
825 | rcu_read_lock(); |
826 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
827 | rcu_read_unlock(); | |
ef5e44a6 | 828 | size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED); |
b411b363 PR |
829 | |
830 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
831 | drbd_bm_capacity(mdev) != size) { | |
832 | int err; | |
02d9a94b | 833 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
834 | if (unlikely(err)) { |
835 | /* currently there is only one error: ENOMEM! */ | |
836 | size = drbd_bm_capacity(mdev)>>1; | |
837 | if (size == 0) { | |
838 | dev_err(DEV, "OUT OF MEMORY! " | |
839 | "Could not allocate bitmap!\n"); | |
840 | } else { | |
841 | dev_err(DEV, "BM resizing failed. " | |
842 | "Leaving size unchanged at size = %lu KB\n", | |
843 | (unsigned long)size); | |
844 | } | |
845 | rv = dev_size_error; | |
846 | } | |
847 | /* racy, see comments above. */ | |
848 | drbd_set_my_capacity(mdev, size); | |
849 | mdev->ldev->md.la_size_sect = size; | |
850 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
851 | (unsigned long long)size>>1); | |
852 | } | |
853 | if (rv == dev_size_error) | |
854 | goto out; | |
855 | ||
856 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
857 | ||
858 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
859 | || prev_size != mdev->ldev->md.md_size_sect; | |
860 | ||
861 | if (la_size_changed || md_moved) { | |
24dccabb AG |
862 | int err; |
863 | ||
b411b363 PR |
864 | drbd_al_shrink(mdev); /* All extents inactive. */ |
865 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
866 | la_size_changed && md_moved ? "size changed and md moved" : | |
867 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
868 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
869 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
870 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
871 | if (err) { |
872 | rv = dev_size_error; | |
873 | goto out; | |
874 | } | |
b411b363 PR |
875 | drbd_md_mark_dirty(mdev); |
876 | } | |
877 | ||
878 | if (size > la_size) | |
879 | rv = grew; | |
880 | if (size < la_size) | |
881 | rv = shrunk; | |
882 | out: | |
883 | lc_unlock(mdev->act_log); | |
884 | wake_up(&mdev->al_wait); | |
885 | drbd_resume_io(mdev); | |
886 | ||
887 | return rv; | |
888 | } | |
889 | ||
890 | sector_t | |
ef5e44a6 PR |
891 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, |
892 | sector_t u_size, int assume_peer_has_space) | |
b411b363 PR |
893 | { |
894 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
895 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
896 | sector_t m_size; /* my size */ | |
b411b363 PR |
897 | sector_t size = 0; |
898 | ||
899 | m_size = drbd_get_max_capacity(bdev); | |
900 | ||
a393db6f PR |
901 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
902 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
903 | p_size = m_size; | |
904 | } | |
905 | ||
b411b363 PR |
906 | if (p_size && m_size) { |
907 | size = min_t(sector_t, p_size, m_size); | |
908 | } else { | |
909 | if (la_size) { | |
910 | size = la_size; | |
911 | if (m_size && m_size < size) | |
912 | size = m_size; | |
913 | if (p_size && p_size < size) | |
914 | size = p_size; | |
915 | } else { | |
916 | if (m_size) | |
917 | size = m_size; | |
918 | if (p_size) | |
919 | size = p_size; | |
920 | } | |
921 | } | |
922 | ||
923 | if (size == 0) | |
924 | dev_err(DEV, "Both nodes diskless!\n"); | |
925 | ||
926 | if (u_size) { | |
927 | if (u_size > size) | |
928 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
929 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
930 | else | |
931 | size = u_size; | |
932 | } | |
933 | ||
934 | return size; | |
935 | } | |
936 | ||
937 | /** | |
938 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
939 | * @mdev: DRBD device. | |
940 | * | |
941 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
942 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
943 | * this function. | |
944 | */ | |
f399002e | 945 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
946 | { |
947 | struct lru_cache *n, *t; | |
948 | struct lc_element *e; | |
949 | unsigned int in_use; | |
950 | int i; | |
951 | ||
b411b363 | 952 | if (mdev->act_log && |
f399002e | 953 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
954 | return 0; |
955 | ||
956 | in_use = 0; | |
957 | t = mdev->act_log; | |
7ad651b5 | 958 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 959 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
960 | |
961 | if (n == NULL) { | |
962 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
963 | return -ENOMEM; | |
964 | } | |
965 | spin_lock_irq(&mdev->al_lock); | |
966 | if (t) { | |
967 | for (i = 0; i < t->nr_elements; i++) { | |
968 | e = lc_element_by_index(t, i); | |
969 | if (e->refcnt) | |
970 | dev_err(DEV, "refcnt(%d)==%d\n", | |
971 | e->lc_number, e->refcnt); | |
972 | in_use += e->refcnt; | |
973 | } | |
974 | } | |
975 | if (!in_use) | |
976 | mdev->act_log = n; | |
977 | spin_unlock_irq(&mdev->al_lock); | |
978 | if (in_use) { | |
979 | dev_err(DEV, "Activity log still in use!\n"); | |
980 | lc_destroy(n); | |
981 | return -EBUSY; | |
982 | } else { | |
983 | if (t) | |
984 | lc_destroy(t); | |
985 | } | |
986 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
987 | return 0; | |
988 | } | |
989 | ||
99432fcc | 990 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
991 | { |
992 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
993 | int max_hw_sectors = max_bio_size >> 9; |
994 | int max_segments = 0; | |
995 | ||
996 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
997 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
998 | ||
999 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc PR |
1000 | rcu_read_lock(); |
1001 | max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs; | |
1002 | rcu_read_unlock(); | |
99432fcc PR |
1003 | put_ldev(mdev); |
1004 | } | |
b411b363 | 1005 | |
b411b363 | 1006 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
1007 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1008 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1009 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
1010 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 1011 | |
99432fcc PR |
1012 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1013 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
1014 | ||
1015 | blk_queue_stack_limits(q, b); | |
1016 | ||
1017 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
1018 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
1019 | q->backing_dev_info.ra_pages, | |
1020 | b->backing_dev_info.ra_pages); | |
1021 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
1022 | } | |
1023 | put_ldev(mdev); | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
1028 | { | |
1029 | int now, new, local, peer; | |
1030 | ||
1031 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
1032 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1033 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1034 | |
99432fcc PR |
1035 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1036 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
1037 | mdev->local_max_bio_size = local; | |
1038 | put_ldev(mdev); | |
b411b363 | 1039 | } |
99432fcc PR |
1040 | |
1041 | /* We may ignore peer limits if the peer is modern enough. | |
1042 | Because new from 8.3.8 onwards the peer can use multiple | |
1043 | BIOs for a single peer_request */ | |
1044 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1045 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 1046 | peer = mdev->peer_max_bio_size; |
31890f4a | 1047 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
1048 | peer = DRBD_MAX_SIZE_H80_PACKET; |
1049 | else /* drbd 8.3.8 onwards */ | |
1050 | peer = DRBD_MAX_BIO_SIZE; | |
1051 | } | |
1052 | ||
1053 | new = min_t(int, local, peer); | |
1054 | ||
1055 | if (mdev->state.role == R_PRIMARY && new < now) | |
1056 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1057 | ||
1058 | if (new != now) | |
1059 | dev_info(DEV, "max BIO size = %u\n", new); | |
1060 | ||
1061 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1062 | } |
1063 | ||
a18e9d1e | 1064 | /* Starts the worker thread */ |
0e29d163 | 1065 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1066 | { |
0e29d163 PR |
1067 | drbd_thread_start(&tconn->worker); |
1068 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1069 | } |
1070 | ||
a18e9d1e | 1071 | /* if still unconfigured, stops worker again. */ |
0e29d163 | 1072 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1073 | { |
992d6e91 | 1074 | bool stop_threads; |
0e29d163 | 1075 | spin_lock_irq(&tconn->req_lock); |
992d6e91 | 1076 | stop_threads = conn_all_vols_unconf(tconn); |
0e29d163 | 1077 | spin_unlock_irq(&tconn->req_lock); |
992d6e91 LE |
1078 | if (stop_threads) { |
1079 | /* asender is implicitly stopped by receiver | |
81fa2e67 | 1080 | * in conn_disconnect() */ |
992d6e91 LE |
1081 | drbd_thread_stop(&tconn->receiver); |
1082 | drbd_thread_stop(&tconn->worker); | |
1083 | } | |
b411b363 PR |
1084 | } |
1085 | ||
0778286a PR |
1086 | /* Make sure IO is suspended before calling this function(). */ |
1087 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1088 | { | |
1089 | int s = 0; | |
1090 | ||
61610420 | 1091 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1092 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1093 | return; | |
1094 | } | |
1095 | ||
61610420 | 1096 | drbd_al_shrink(mdev); |
87eeee41 | 1097 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1098 | if (mdev->state.conn < C_CONNECTED) |
1099 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1100 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1101 | lc_unlock(mdev->act_log); |
0778286a PR |
1102 | |
1103 | if (s) | |
1104 | dev_info(DEV, "Suspended AL updates\n"); | |
1105 | } | |
1106 | ||
5979e361 LE |
1107 | |
1108 | static bool should_set_defaults(struct genl_info *info) | |
1109 | { | |
1110 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1111 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1112 | } | |
1113 | ||
d589a21e PR |
1114 | static void enforce_disk_conf_limits(struct disk_conf *dc) |
1115 | { | |
1116 | if (dc->al_extents < DRBD_AL_EXTENTS_MIN) | |
1117 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
1118 | if (dc->al_extents > DRBD_AL_EXTENTS_MAX) | |
1119 | dc->al_extents = DRBD_AL_EXTENTS_MAX; | |
1120 | ||
1121 | if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1122 | dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
1123 | } | |
1124 | ||
f399002e LE |
1125 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1126 | { | |
1127 | enum drbd_ret_code retcode; | |
1128 | struct drbd_conf *mdev; | |
daeda1cc | 1129 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1130 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1131 | int err, fifo_size; |
f399002e LE |
1132 | |
1133 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1134 | if (!adm_ctx.reply_skb) | |
1135 | return retcode; | |
1136 | if (retcode != NO_ERROR) | |
1137 | goto out; | |
1138 | ||
1139 | mdev = adm_ctx.mdev; | |
1140 | ||
1141 | /* we also need a disk | |
1142 | * to change the options on */ | |
1143 | if (!get_ldev(mdev)) { | |
1144 | retcode = ERR_NO_DISK; | |
1145 | goto out; | |
1146 | } | |
1147 | ||
daeda1cc | 1148 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1149 | if (!new_disk_conf) { |
f399002e LE |
1150 | retcode = ERR_NOMEM; |
1151 | goto fail; | |
1152 | } | |
1153 | ||
daeda1cc PR |
1154 | mutex_lock(&mdev->tconn->conf_update); |
1155 | old_disk_conf = mdev->ldev->disk_conf; | |
1156 | *new_disk_conf = *old_disk_conf; | |
5979e361 | 1157 | if (should_set_defaults(info)) |
b966b5dd | 1158 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1159 | |
5ecc72c3 | 1160 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1161 | if (err && err != -ENOMSG) { |
f399002e LE |
1162 | retcode = ERR_MANDATORY_TAG; |
1163 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1164 | } | |
1165 | ||
5ecc72c3 LE |
1166 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1167 | new_disk_conf->resync_rate = 1; | |
f399002e | 1168 | |
d589a21e | 1169 | enforce_disk_conf_limits(new_disk_conf); |
f399002e | 1170 | |
5ecc72c3 | 1171 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
9958c857 | 1172 | if (fifo_size != mdev->rs_plan_s->size) { |
813472ce PR |
1173 | new_plan = fifo_alloc(fifo_size); |
1174 | if (!new_plan) { | |
f399002e LE |
1175 | dev_err(DEV, "kmalloc of fifo_buffer failed"); |
1176 | retcode = ERR_NOMEM; | |
daeda1cc | 1177 | goto fail_unlock; |
f399002e LE |
1178 | } |
1179 | } | |
1180 | ||
f399002e LE |
1181 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); |
1182 | drbd_al_shrink(mdev); | |
5ecc72c3 | 1183 | err = drbd_check_al_size(mdev, new_disk_conf); |
f399002e LE |
1184 | lc_unlock(mdev->act_log); |
1185 | wake_up(&mdev->al_wait); | |
1186 | ||
1187 | if (err) { | |
1188 | retcode = ERR_NOMEM; | |
daeda1cc | 1189 | goto fail_unlock; |
f399002e LE |
1190 | } |
1191 | ||
dc97b708 | 1192 | write_lock_irq(&global_state_lock); |
95f8efd0 | 1193 | retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after); |
dc97b708 | 1194 | if (retcode == NO_ERROR) { |
daeda1cc | 1195 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); |
95f8efd0 | 1196 | drbd_resync_after_changed(mdev); |
dc97b708 PR |
1197 | } |
1198 | write_unlock_irq(&global_state_lock); | |
f399002e | 1199 | |
daeda1cc PR |
1200 | if (retcode != NO_ERROR) |
1201 | goto fail_unlock; | |
f399002e | 1202 | |
813472ce PR |
1203 | if (new_plan) { |
1204 | old_plan = mdev->rs_plan_s; | |
1205 | rcu_assign_pointer(mdev->rs_plan_s, new_plan); | |
9958c857 | 1206 | } |
9958c857 | 1207 | |
c141ebda | 1208 | mutex_unlock(&mdev->tconn->conf_update); |
daeda1cc | 1209 | drbd_md_sync(mdev); |
f399002e LE |
1210 | |
1211 | if (mdev->state.conn >= C_CONNECTED) | |
1212 | drbd_send_sync_param(mdev); | |
1213 | ||
daeda1cc PR |
1214 | synchronize_rcu(); |
1215 | kfree(old_disk_conf); | |
813472ce | 1216 | kfree(old_plan); |
daeda1cc PR |
1217 | goto success; |
1218 | ||
1219 | fail_unlock: | |
1220 | mutex_unlock(&mdev->tconn->conf_update); | |
f399002e | 1221 | fail: |
5ecc72c3 | 1222 | kfree(new_disk_conf); |
813472ce | 1223 | kfree(new_plan); |
daeda1cc PR |
1224 | success: |
1225 | put_ldev(mdev); | |
f399002e LE |
1226 | out: |
1227 | drbd_adm_finish(info, retcode); | |
1228 | return 0; | |
1229 | } | |
1230 | ||
3b98c0c2 | 1231 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1232 | { |
3b98c0c2 LE |
1233 | struct drbd_conf *mdev; |
1234 | int err; | |
116676ca | 1235 | enum drbd_ret_code retcode; |
b411b363 PR |
1236 | enum determine_dev_size dd; |
1237 | sector_t max_possible_sectors; | |
1238 | sector_t min_md_device_sectors; | |
1239 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1240 | struct disk_conf *new_disk_conf = NULL; |
e525fd89 | 1241 | struct block_device *bdev; |
b411b363 | 1242 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1243 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1244 | union drbd_state ns, os; |
f2024e7c | 1245 | enum drbd_state_rv rv; |
44ed167d | 1246 | struct net_conf *nc; |
b411b363 | 1247 | int cp_discovered = 0; |
b411b363 | 1248 | |
3b98c0c2 LE |
1249 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1250 | if (!adm_ctx.reply_skb) | |
1251 | return retcode; | |
1252 | if (retcode != NO_ERROR) | |
40cbf085 | 1253 | goto finish; |
3b98c0c2 LE |
1254 | |
1255 | mdev = adm_ctx.mdev; | |
0e29d163 | 1256 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1257 | |
1258 | /* if you want to reconfigure, please tear down first */ | |
1259 | if (mdev->state.disk > D_DISKLESS) { | |
1260 | retcode = ERR_DISK_CONFIGURED; | |
1261 | goto fail; | |
1262 | } | |
82f59cc6 LE |
1263 | /* It may just now have detached because of IO error. Make sure |
1264 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1265 | * e.g. if someone calls attach from the on-io-error handler, | |
1266 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1267 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1268 | |
3b98c0c2 | 1269 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1270 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1271 | if (!nbc) { | |
1272 | retcode = ERR_NOMEM; | |
1273 | goto fail; | |
1274 | } | |
daeda1cc PR |
1275 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1276 | if (!new_disk_conf) { | |
1277 | retcode = ERR_NOMEM; | |
1278 | goto fail; | |
1279 | } | |
1280 | nbc->disk_conf = new_disk_conf; | |
b411b363 | 1281 | |
daeda1cc PR |
1282 | set_disk_conf_defaults(new_disk_conf); |
1283 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1284 | if (err) { |
b411b363 | 1285 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1286 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1287 | goto fail; |
1288 | } | |
1289 | ||
d589a21e PR |
1290 | enforce_disk_conf_limits(new_disk_conf); |
1291 | ||
9958c857 PR |
1292 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1293 | if (!new_plan) { | |
1294 | retcode = ERR_NOMEM; | |
1295 | goto fail; | |
1296 | } | |
1297 | ||
daeda1cc | 1298 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1299 | retcode = ERR_MD_IDX_INVALID; |
1300 | goto fail; | |
1301 | } | |
1302 | ||
44ed167d PR |
1303 | rcu_read_lock(); |
1304 | nc = rcu_dereference(mdev->tconn->net_conf); | |
1305 | if (nc) { | |
daeda1cc | 1306 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1307 | rcu_read_unlock(); |
47ff2d0a PR |
1308 | retcode = ERR_STONITH_AND_PROT_A; |
1309 | goto fail; | |
1310 | } | |
1311 | } | |
44ed167d | 1312 | rcu_read_unlock(); |
47ff2d0a | 1313 | |
daeda1cc | 1314 | bdev = blkdev_get_by_path(new_disk_conf->backing_dev, |
d4d77629 | 1315 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); |
e525fd89 | 1316 | if (IS_ERR(bdev)) { |
daeda1cc | 1317 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev, |
e525fd89 | 1318 | PTR_ERR(bdev)); |
b411b363 PR |
1319 | retcode = ERR_OPEN_DISK; |
1320 | goto fail; | |
1321 | } | |
e525fd89 TH |
1322 | nbc->backing_bdev = bdev; |
1323 | ||
1324 | /* | |
1325 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1326 | * drbd sharing one meta device. TODO in that case, paranoia | |
1327 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1328 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1329 | * should check it for you already; but if you don't, or | |
1330 | * someone fooled it, we need to double check here) | |
1331 | */ | |
daeda1cc | 1332 | bdev = blkdev_get_by_path(new_disk_conf->meta_dev, |
d4d77629 | 1333 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, |
daeda1cc | 1334 | (new_disk_conf->meta_dev_idx < 0) ? |
d4d77629 | 1335 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1336 | if (IS_ERR(bdev)) { |
daeda1cc | 1337 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev, |
e525fd89 | 1338 | PTR_ERR(bdev)); |
b411b363 PR |
1339 | retcode = ERR_OPEN_MD_DISK; |
1340 | goto fail; | |
1341 | } | |
e525fd89 | 1342 | nbc->md_bdev = bdev; |
b411b363 | 1343 | |
e525fd89 | 1344 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1345 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1346 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1347 | retcode = ERR_MD_IDX_INVALID; |
b411b363 PR |
1348 | goto fail; |
1349 | } | |
1350 | ||
1351 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1352 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1353 | offsetof(struct bm_extent, lce)); |
1354 | if (!resync_lru) { | |
1355 | retcode = ERR_NOMEM; | |
e525fd89 | 1356 | goto fail; |
b411b363 PR |
1357 | } |
1358 | ||
1359 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1360 | drbd_md_set_sector_offsets(mdev, nbc); | |
1361 | ||
daeda1cc | 1362 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
b411b363 PR |
1363 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", |
1364 | (unsigned long long) drbd_get_max_capacity(nbc), | |
daeda1cc | 1365 | (unsigned long long) new_disk_conf->disk_size); |
67b58bf7 | 1366 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1367 | goto fail; |
b411b363 PR |
1368 | } |
1369 | ||
daeda1cc | 1370 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1371 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1372 | /* at least one MB, otherwise it does not make sense */ | |
1373 | min_md_device_sectors = (2<<10); | |
1374 | } else { | |
1375 | max_possible_sectors = DRBD_MAX_SECTORS; | |
daeda1cc | 1376 | min_md_device_sectors = MD_RESERVED_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1377 | } |
1378 | ||
b411b363 | 1379 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
67b58bf7 | 1380 | retcode = ERR_MD_DISK_TOO_SMALL; |
b411b363 PR |
1381 | dev_warn(DEV, "refusing attach: md-device too small, " |
1382 | "at least %llu sectors needed for this meta-disk type\n", | |
1383 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1384 | goto fail; |
b411b363 PR |
1385 | } |
1386 | ||
1387 | /* Make sure the new disk is big enough | |
1388 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1389 | if (drbd_get_max_capacity(nbc) < | |
1390 | drbd_get_capacity(mdev->this_bdev)) { | |
67b58bf7 | 1391 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1392 | goto fail; |
b411b363 PR |
1393 | } |
1394 | ||
1395 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1396 | ||
1352994b LE |
1397 | if (nbc->known_size > max_possible_sectors) { |
1398 | dev_warn(DEV, "==> truncating very big lower level device " | |
1399 | "to currently maximum possible %llu sectors <==\n", | |
1400 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1401 | if (new_disk_conf->meta_dev_idx >= 0) |
1352994b LE |
1402 | dev_warn(DEV, "==>> using internal or flexible " |
1403 | "meta data may help <<==\n"); | |
1404 | } | |
1405 | ||
b411b363 PR |
1406 | drbd_suspend_io(mdev); |
1407 | /* also wait for the last barrier ack. */ | |
2aebfabb | 1408 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 | 1409 | /* and for any other previously queued work */ |
a21e9298 | 1410 | drbd_flush_workqueue(mdev); |
b411b363 | 1411 | |
f2024e7c AG |
1412 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1413 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1414 | drbd_resume_io(mdev); |
f2024e7c | 1415 | if (rv < SS_SUCCESS) |
e525fd89 | 1416 | goto fail; |
b411b363 PR |
1417 | |
1418 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1419 | goto force_diskless; | |
1420 | ||
1421 | drbd_md_set_sector_offsets(mdev, nbc); | |
1422 | ||
1423 | if (!mdev->bitmap) { | |
1424 | if (drbd_bm_init(mdev)) { | |
1425 | retcode = ERR_NOMEM; | |
1426 | goto force_diskless_dec; | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | retcode = drbd_md_read(mdev, nbc); | |
1431 | if (retcode != NO_ERROR) | |
1432 | goto force_diskless_dec; | |
1433 | ||
1434 | if (mdev->state.conn < C_CONNECTED && | |
1435 | mdev->state.role == R_PRIMARY && | |
1436 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1437 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1438 | (unsigned long long)mdev->ed_uuid); | |
1439 | retcode = ERR_DATA_NOT_CURRENT; | |
1440 | goto force_diskless_dec; | |
1441 | } | |
1442 | ||
1443 | /* Since we are diskless, fix the activity log first... */ | |
daeda1cc | 1444 | if (drbd_check_al_size(mdev, new_disk_conf)) { |
b411b363 PR |
1445 | retcode = ERR_NOMEM; |
1446 | goto force_diskless_dec; | |
1447 | } | |
1448 | ||
1449 | /* Prevent shrinking of consistent devices ! */ | |
1450 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
daeda1cc | 1451 | drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) { |
b411b363 | 1452 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
67b58bf7 | 1453 | retcode = ERR_DISK_TOO_SMALL; |
b411b363 PR |
1454 | goto force_diskless_dec; |
1455 | } | |
1456 | ||
1457 | if (!drbd_al_read_log(mdev, nbc)) { | |
1458 | retcode = ERR_IO_MD_DISK; | |
1459 | goto force_diskless_dec; | |
1460 | } | |
1461 | ||
b411b363 PR |
1462 | /* Reset the "barriers don't work" bits here, then force meta data to |
1463 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 1464 | if (new_disk_conf->md_flushes) |
a8a4e51e | 1465 | clear_bit(MD_NO_FUA, &mdev->flags); |
e544046a AG |
1466 | else |
1467 | set_bit(MD_NO_FUA, &mdev->flags); | |
b411b363 PR |
1468 | |
1469 | /* Point of no return reached. | |
1470 | * Devices and memory are no longer released by error cleanup below. | |
1471 | * now mdev takes over responsibility, and the state engine should | |
1472 | * clean it up somewhere. */ | |
1473 | D_ASSERT(mdev->ldev == NULL); | |
1474 | mdev->ldev = nbc; | |
1475 | mdev->resync = resync_lru; | |
9958c857 | 1476 | mdev->rs_plan_s = new_plan; |
b411b363 PR |
1477 | nbc = NULL; |
1478 | resync_lru = NULL; | |
daeda1cc | 1479 | new_disk_conf = NULL; |
9958c857 | 1480 | new_plan = NULL; |
b411b363 | 1481 | |
2451fc3b PR |
1482 | mdev->write_ordering = WO_bdev_flush; |
1483 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1484 | |
1485 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1486 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1487 | else | |
1488 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1489 | ||
894c6a94 | 1490 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
da9fbc27 | 1491 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) { |
b411b363 PR |
1492 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1493 | cp_discovered = 1; | |
1494 | } | |
1495 | ||
1496 | mdev->send_cnt = 0; | |
1497 | mdev->recv_cnt = 0; | |
1498 | mdev->read_cnt = 0; | |
1499 | mdev->writ_cnt = 0; | |
1500 | ||
99432fcc | 1501 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1502 | |
1503 | /* If I am currently not R_PRIMARY, | |
1504 | * but meta data primary indicator is set, | |
1505 | * I just now recover from a hard crash, | |
1506 | * and have been R_PRIMARY before that crash. | |
1507 | * | |
1508 | * Now, if I had no connection before that crash | |
1509 | * (have been degraded R_PRIMARY), chances are that | |
1510 | * I won't find my peer now either. | |
1511 | * | |
1512 | * In that case, and _only_ in that case, | |
1513 | * we use the degr-wfc-timeout instead of the default, | |
1514 | * so we can automatically recover from a crash of a | |
1515 | * degraded but active "cluster" after a certain timeout. | |
1516 | */ | |
1517 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1518 | if (mdev->state.role != R_PRIMARY && | |
1519 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1520 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1521 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1522 | ||
24c4830c | 1523 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1524 | if (dd == dev_size_error) { |
1525 | retcode = ERR_NOMEM_BITMAP; | |
1526 | goto force_diskless_dec; | |
1527 | } else if (dd == grew) | |
1528 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1529 | ||
1530 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1531 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1532 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1533 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1534 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1535 | retcode = ERR_IO_MD_DISK; |
1536 | goto force_diskless_dec; | |
1537 | } | |
1538 | } else { | |
20ceb2b2 | 1539 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1540 | "read from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1541 | retcode = ERR_IO_MD_DISK; |
1542 | goto force_diskless_dec; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | if (cp_discovered) { | |
1547 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1548 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1549 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1550 | retcode = ERR_IO_MD_DISK; |
1551 | goto force_diskless_dec; | |
1552 | } | |
b411b363 PR |
1553 | } |
1554 | ||
0778286a PR |
1555 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1556 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1557 | ||
87eeee41 | 1558 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1559 | os = drbd_read_state(mdev); |
1560 | ns = os; | |
b411b363 PR |
1561 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1562 | otherwise investigate MDF_WasUpToDate... | |
1563 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1564 | otherwise into D_CONSISTENT state. | |
1565 | */ | |
1566 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1567 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1568 | ns.disk = D_CONSISTENT; | |
1569 | else | |
1570 | ns.disk = D_OUTDATED; | |
1571 | } else { | |
1572 | ns.disk = D_INCONSISTENT; | |
1573 | } | |
1574 | ||
1575 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1576 | ns.pdsk = D_OUTDATED; | |
1577 | ||
daeda1cc PR |
1578 | rcu_read_lock(); |
1579 | if (ns.disk == D_CONSISTENT && | |
1580 | (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE)) | |
b411b363 | 1581 | ns.disk = D_UP_TO_DATE; |
daeda1cc | 1582 | rcu_read_unlock(); |
b411b363 PR |
1583 | |
1584 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1585 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1586 | this point, because drbd_request_state() modifies these | |
1587 | flags. */ | |
1588 | ||
1589 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1590 | state after the negotiation phase. */ | |
1591 | if (mdev->state.conn == C_CONNECTED) { | |
1592 | mdev->new_state_tmp.i = ns.i; | |
1593 | ns.i = os.i; | |
1594 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1595 | |
1596 | /* We expect to receive up-to-date UUIDs soon. | |
1597 | To avoid a race in receive_state, free p_uuid while | |
1598 | holding req_lock. I.e. atomic with the state change */ | |
1599 | kfree(mdev->p_uuid); | |
1600 | mdev->p_uuid = NULL; | |
b411b363 PR |
1601 | } |
1602 | ||
1603 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1604 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1605 | |
1606 | if (rv < SS_SUCCESS) | |
1607 | goto force_diskless_dec; | |
1608 | ||
1609 | if (mdev->state.role == R_PRIMARY) | |
1610 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1611 | else | |
1612 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1613 | ||
1614 | drbd_md_mark_dirty(mdev); | |
1615 | drbd_md_sync(mdev); | |
1616 | ||
1617 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1618 | put_ldev(mdev); | |
0e29d163 | 1619 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1620 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1621 | return 0; |
1622 | ||
1623 | force_diskless_dec: | |
1624 | put_ldev(mdev); | |
1625 | force_diskless: | |
82f59cc6 | 1626 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1627 | drbd_md_sync(mdev); |
b411b363 | 1628 | fail: |
40cbf085 | 1629 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1630 | if (nbc) { |
e525fd89 TH |
1631 | if (nbc->backing_bdev) |
1632 | blkdev_put(nbc->backing_bdev, | |
1633 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1634 | if (nbc->md_bdev) | |
1635 | blkdev_put(nbc->md_bdev, | |
1636 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1637 | kfree(nbc); |
1638 | } | |
daeda1cc | 1639 | kfree(new_disk_conf); |
b411b363 | 1640 | lc_destroy(resync_lru); |
9958c857 | 1641 | kfree(new_plan); |
b411b363 | 1642 | |
40cbf085 | 1643 | finish: |
3b98c0c2 | 1644 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1645 | return 0; |
1646 | } | |
1647 | ||
85f75dd7 LE |
1648 | static int adm_detach(struct drbd_conf *mdev) |
1649 | { | |
19f83c76 | 1650 | enum drbd_state_rv retcode; |
009ba89d | 1651 | int ret; |
85f75dd7 | 1652 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
009ba89d LE |
1653 | retcode = drbd_request_state(mdev, NS(disk, D_FAILED)); |
1654 | /* D_FAILED will transition to DISKLESS. */ | |
1655 | ret = wait_event_interruptible(mdev->misc_wait, | |
1656 | mdev->state.disk != D_FAILED); | |
85f75dd7 | 1657 | drbd_resume_io(mdev); |
009ba89d LE |
1658 | if ((int)retcode == (int)SS_IS_DISKLESS) |
1659 | retcode = SS_NOTHING_TO_DO; | |
1660 | if (ret) | |
1661 | retcode = ERR_INTR; | |
85f75dd7 LE |
1662 | return retcode; |
1663 | } | |
1664 | ||
82f59cc6 LE |
1665 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1666 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1667 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1668 | * internal references as well. | |
1669 | * Only then we have finally detached. */ | |
3b98c0c2 | 1670 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1671 | { |
9a0d9d03 | 1672 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1673 | |
1674 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1675 | if (!adm_ctx.reply_skb) | |
1676 | return retcode; | |
1677 | if (retcode != NO_ERROR) | |
1678 | goto out; | |
1679 | ||
85f75dd7 | 1680 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1681 | out: |
1682 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1683 | return 0; |
1684 | } | |
1685 | ||
f399002e LE |
1686 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1687 | { | |
1688 | struct drbd_conf *mdev; | |
695d08fa | 1689 | bool rv = false; |
f399002e LE |
1690 | int vnr; |
1691 | ||
695d08fa | 1692 | rcu_read_lock(); |
f399002e LE |
1693 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1694 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1695 | mdev->state.conn == C_SYNC_TARGET || | |
1696 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1697 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1698 | rv = true; | |
1699 | break; | |
1700 | } | |
f399002e | 1701 | } |
695d08fa PR |
1702 | rcu_read_unlock(); |
1703 | ||
1704 | return rv; | |
f399002e LE |
1705 | } |
1706 | ||
1707 | static bool conn_ov_running(struct drbd_tconn *tconn) | |
1708 | { | |
1709 | struct drbd_conf *mdev; | |
695d08fa | 1710 | bool rv = false; |
f399002e LE |
1711 | int vnr; |
1712 | ||
695d08fa | 1713 | rcu_read_lock(); |
f399002e LE |
1714 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1715 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1716 | mdev->state.conn == C_VERIFY_T) { |
1717 | rv = true; | |
1718 | break; | |
1719 | } | |
f399002e | 1720 | } |
695d08fa PR |
1721 | rcu_read_unlock(); |
1722 | ||
1723 | return rv; | |
f399002e LE |
1724 | } |
1725 | ||
cd64397c | 1726 | static enum drbd_ret_code |
44ed167d | 1727 | _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf) |
cd64397c PR |
1728 | { |
1729 | struct drbd_conf *mdev; | |
1730 | int i; | |
1731 | ||
dcb20d1a PR |
1732 | if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) { |
1733 | if (new_conf->wire_protocol != old_conf->wire_protocol) | |
1734 | return ERR_NEED_APV_100; | |
1735 | ||
1736 | if (new_conf->two_primaries != old_conf->two_primaries) | |
1737 | return ERR_NEED_APV_100; | |
1738 | ||
1739 | if (!new_conf->integrity_alg != !old_conf->integrity_alg) | |
1740 | return ERR_NEED_APV_100; | |
1741 | ||
1742 | if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg)) | |
1743 | return ERR_NEED_APV_100; | |
1744 | } | |
1745 | ||
1746 | if (!new_conf->two_primaries && | |
1747 | conn_highest_role(tconn) == R_PRIMARY && | |
1748 | conn_highest_peer(tconn) == R_PRIMARY) | |
1749 | return ERR_NEED_ALLOW_TWO_PRI; | |
b032b6fa | 1750 | |
cd64397c PR |
1751 | if (new_conf->two_primaries && |
1752 | (new_conf->wire_protocol != DRBD_PROT_C)) | |
1753 | return ERR_NOT_PROTO_C; | |
1754 | ||
cd64397c PR |
1755 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1756 | if (get_ldev(mdev)) { | |
daeda1cc | 1757 | enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing; |
cd64397c | 1758 | put_ldev(mdev); |
44ed167d | 1759 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 1760 | return ERR_STONITH_AND_PROT_A; |
cd64397c | 1761 | } |
6139f60d | 1762 | if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data) |
cd64397c | 1763 | return ERR_DISCARD; |
cd64397c | 1764 | } |
cd64397c PR |
1765 | |
1766 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) | |
1767 | return ERR_CONG_NOT_PROTO_A; | |
1768 | ||
1769 | return NO_ERROR; | |
1770 | } | |
1771 | ||
44ed167d PR |
1772 | static enum drbd_ret_code |
1773 | check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf) | |
1774 | { | |
1775 | static enum drbd_ret_code rv; | |
1776 | struct drbd_conf *mdev; | |
1777 | int i; | |
1778 | ||
1779 | rcu_read_lock(); | |
1780 | rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf); | |
1781 | rcu_read_unlock(); | |
1782 | ||
1783 | /* tconn->volumes protected by genl_lock() here */ | |
1784 | idr_for_each_entry(&tconn->volumes, mdev, i) { | |
1785 | if (!mdev->bitmap) { | |
1786 | if(drbd_bm_init(mdev)) | |
1787 | return ERR_NOMEM; | |
1788 | } | |
1789 | } | |
1790 | ||
1791 | return rv; | |
1792 | } | |
1793 | ||
0fd0ea06 PR |
1794 | struct crypto { |
1795 | struct crypto_hash *verify_tfm; | |
1796 | struct crypto_hash *csums_tfm; | |
1797 | struct crypto_hash *cram_hmac_tfm; | |
8d412fc6 | 1798 | struct crypto_hash *integrity_tfm; |
0fd0ea06 PR |
1799 | void *int_dig_in; |
1800 | void *int_dig_vv; | |
1801 | }; | |
1802 | ||
1803 | static int | |
4b6ad6d4 | 1804 | alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
1805 | { |
1806 | if (!tfm_name[0]) | |
1807 | return NO_ERROR; | |
1808 | ||
1809 | *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC); | |
1810 | if (IS_ERR(*tfm)) { | |
1811 | *tfm = NULL; | |
1812 | return err_alg; | |
1813 | } | |
1814 | ||
0fd0ea06 PR |
1815 | return NO_ERROR; |
1816 | } | |
1817 | ||
1818 | static enum drbd_ret_code | |
1819 | alloc_crypto(struct crypto *crypto, struct net_conf *new_conf) | |
1820 | { | |
1821 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
1822 | enum drbd_ret_code rv; | |
1823 | int hash_size; | |
1824 | ||
4b6ad6d4 AG |
1825 | rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg, |
1826 | ERR_CSUMS_ALG); | |
0fd0ea06 PR |
1827 | if (rv != NO_ERROR) |
1828 | return rv; | |
4b6ad6d4 AG |
1829 | rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg, |
1830 | ERR_VERIFY_ALG); | |
0fd0ea06 PR |
1831 | if (rv != NO_ERROR) |
1832 | return rv; | |
4b6ad6d4 AG |
1833 | rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg, |
1834 | ERR_INTEGRITY_ALG); | |
0fd0ea06 PR |
1835 | if (rv != NO_ERROR) |
1836 | return rv; | |
0fd0ea06 PR |
1837 | if (new_conf->cram_hmac_alg[0] != 0) { |
1838 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1839 | new_conf->cram_hmac_alg); | |
1840 | ||
4b6ad6d4 AG |
1841 | rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name, |
1842 | ERR_AUTH_ALG); | |
0fd0ea06 | 1843 | } |
8d412fc6 AG |
1844 | if (crypto->integrity_tfm) { |
1845 | hash_size = crypto_hash_digestsize(crypto->integrity_tfm); | |
0fd0ea06 PR |
1846 | crypto->int_dig_in = kmalloc(hash_size, GFP_KERNEL); |
1847 | if (!crypto->int_dig_in) | |
1848 | return ERR_NOMEM; | |
1849 | crypto->int_dig_vv = kmalloc(hash_size, GFP_KERNEL); | |
1850 | if (!crypto->int_dig_vv) | |
1851 | return ERR_NOMEM; | |
1852 | } | |
1853 | ||
1854 | return rv; | |
1855 | } | |
1856 | ||
1857 | static void free_crypto(struct crypto *crypto) | |
1858 | { | |
1859 | kfree(crypto->int_dig_in); | |
1860 | kfree(crypto->int_dig_vv); | |
1861 | crypto_free_hash(crypto->cram_hmac_tfm); | |
8d412fc6 | 1862 | crypto_free_hash(crypto->integrity_tfm); |
0fd0ea06 PR |
1863 | crypto_free_hash(crypto->csums_tfm); |
1864 | crypto_free_hash(crypto->verify_tfm); | |
1865 | } | |
1866 | ||
f399002e LE |
1867 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
1868 | { | |
1869 | enum drbd_ret_code retcode; | |
1870 | struct drbd_tconn *tconn; | |
44ed167d | 1871 | struct net_conf *old_conf, *new_conf = NULL; |
f399002e LE |
1872 | int err; |
1873 | int ovr; /* online verify running */ | |
1874 | int rsr; /* re-sync running */ | |
0fd0ea06 | 1875 | struct crypto crypto = { }; |
f399002e LE |
1876 | |
1877 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); | |
1878 | if (!adm_ctx.reply_skb) | |
1879 | return retcode; | |
1880 | if (retcode != NO_ERROR) | |
1881 | goto out; | |
1882 | ||
1883 | tconn = adm_ctx.tconn; | |
1884 | ||
1885 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); | |
1886 | if (!new_conf) { | |
1887 | retcode = ERR_NOMEM; | |
1888 | goto out; | |
1889 | } | |
1890 | ||
44ed167d PR |
1891 | conn_reconfig_start(tconn); |
1892 | ||
88104ca4 | 1893 | mutex_lock(&tconn->data.mutex); |
a0095508 | 1894 | mutex_lock(&tconn->conf_update); |
91fd4dad | 1895 | old_conf = tconn->net_conf; |
44ed167d PR |
1896 | |
1897 | if (!old_conf) { | |
f399002e LE |
1898 | drbd_msg_put_info("net conf missing, try connect"); |
1899 | retcode = ERR_INVALID_REQUEST; | |
91fd4dad | 1900 | goto fail; |
f399002e LE |
1901 | } |
1902 | ||
44ed167d | 1903 | *new_conf = *old_conf; |
5979e361 | 1904 | if (should_set_defaults(info)) |
b966b5dd | 1905 | set_net_conf_defaults(new_conf); |
f399002e | 1906 | |
f399002e | 1907 | err = net_conf_from_attrs_for_change(new_conf, info); |
c75b9b10 | 1908 | if (err && err != -ENOMSG) { |
f399002e LE |
1909 | retcode = ERR_MANDATORY_TAG; |
1910 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1911 | goto fail; | |
1912 | } | |
1913 | ||
cd64397c PR |
1914 | retcode = check_net_options(tconn, new_conf); |
1915 | if (retcode != NO_ERROR) | |
1916 | goto fail; | |
1917 | ||
f399002e LE |
1918 | /* re-sync running */ |
1919 | rsr = conn_resync_running(tconn); | |
0fd0ea06 | 1920 | if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) { |
f399002e | 1921 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 1922 | goto fail; |
f399002e LE |
1923 | } |
1924 | ||
f399002e LE |
1925 | /* online verify running */ |
1926 | ovr = conn_ov_running(tconn); | |
0fd0ea06 PR |
1927 | if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) { |
1928 | retcode = ERR_VERIFY_RUNNING; | |
1929 | goto fail; | |
f399002e LE |
1930 | } |
1931 | ||
0fd0ea06 PR |
1932 | retcode = alloc_crypto(&crypto, new_conf); |
1933 | if (retcode != NO_ERROR) | |
1934 | goto fail; | |
f399002e | 1935 | |
44ed167d | 1936 | rcu_assign_pointer(tconn->net_conf, new_conf); |
f399002e LE |
1937 | |
1938 | if (!rsr) { | |
1939 | crypto_free_hash(tconn->csums_tfm); | |
0fd0ea06 PR |
1940 | tconn->csums_tfm = crypto.csums_tfm; |
1941 | crypto.csums_tfm = NULL; | |
f399002e LE |
1942 | } |
1943 | if (!ovr) { | |
1944 | crypto_free_hash(tconn->verify_tfm); | |
0fd0ea06 PR |
1945 | tconn->verify_tfm = crypto.verify_tfm; |
1946 | crypto.verify_tfm = NULL; | |
f399002e LE |
1947 | } |
1948 | ||
0fd0ea06 PR |
1949 | kfree(tconn->int_dig_in); |
1950 | tconn->int_dig_in = crypto.int_dig_in; | |
1951 | kfree(tconn->int_dig_vv); | |
1952 | tconn->int_dig_vv = crypto.int_dig_vv; | |
8d412fc6 AG |
1953 | crypto_free_hash(tconn->integrity_tfm); |
1954 | tconn->integrity_tfm = crypto.integrity_tfm; | |
d659f2aa | 1955 | if (tconn->cstate >= C_WF_REPORT_PARAMS && tconn->agreed_pro_version >= 100) |
88104ca4 | 1956 | /* Do this without trying to take tconn->data.mutex again. */ |
d659f2aa | 1957 | __drbd_send_protocol(tconn, P_PROTOCOL_UPDATE); |
0fd0ea06 | 1958 | |
0fd0ea06 PR |
1959 | crypto_free_hash(tconn->cram_hmac_tfm); |
1960 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
1961 | ||
a0095508 | 1962 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 1963 | mutex_unlock(&tconn->data.mutex); |
91fd4dad PR |
1964 | synchronize_rcu(); |
1965 | kfree(old_conf); | |
1966 | ||
f399002e LE |
1967 | if (tconn->cstate >= C_WF_REPORT_PARAMS) |
1968 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
1969 | ||
91fd4dad PR |
1970 | goto done; |
1971 | ||
f399002e | 1972 | fail: |
a0095508 | 1973 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 1974 | mutex_unlock(&tconn->data.mutex); |
0fd0ea06 | 1975 | free_crypto(&crypto); |
f399002e | 1976 | kfree(new_conf); |
91fd4dad | 1977 | done: |
f399002e LE |
1978 | conn_reconfig_done(tconn); |
1979 | out: | |
1980 | drbd_adm_finish(info, retcode); | |
1981 | return 0; | |
1982 | } | |
1983 | ||
3b98c0c2 | 1984 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1985 | { |
3b98c0c2 | 1986 | struct drbd_conf *mdev; |
44ed167d | 1987 | struct net_conf *old_conf, *new_conf = NULL; |
0fd0ea06 | 1988 | struct crypto crypto = { }; |
80883197 | 1989 | struct drbd_tconn *oconn; |
3b98c0c2 | 1990 | struct drbd_tconn *tconn; |
b411b363 | 1991 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1992 | enum drbd_ret_code retcode; |
1993 | int i; | |
1994 | int err; | |
b411b363 | 1995 | |
3b98c0c2 LE |
1996 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1997 | if (!adm_ctx.reply_skb) | |
1998 | return retcode; | |
1999 | if (retcode != NO_ERROR) | |
2000 | goto out; | |
2001 | ||
2002 | tconn = adm_ctx.tconn; | |
80883197 | 2003 | conn_reconfig_start(tconn); |
b411b363 | 2004 | |
80883197 | 2005 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
2006 | retcode = ERR_NET_CONFIGURED; |
2007 | goto fail; | |
2008 | } | |
2009 | ||
2010 | /* allocation not in the IO path, cqueue thread context */ | |
5979e361 | 2011 | new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL); |
b411b363 PR |
2012 | if (!new_conf) { |
2013 | retcode = ERR_NOMEM; | |
2014 | goto fail; | |
2015 | } | |
2016 | ||
b966b5dd | 2017 | set_net_conf_defaults(new_conf); |
f399002e LE |
2018 | |
2019 | err = net_conf_from_attrs(new_conf, info); | |
3b98c0c2 | 2020 | if (err) { |
b411b363 | 2021 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2022 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2023 | goto fail; |
2024 | } | |
2025 | ||
cd64397c PR |
2026 | retcode = check_net_options(tconn, new_conf); |
2027 | if (retcode != NO_ERROR) | |
422028b1 | 2028 | goto fail; |
422028b1 | 2029 | |
b411b363 PR |
2030 | retcode = NO_ERROR; |
2031 | ||
2032 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
2033 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b | 2034 | |
c141ebda | 2035 | /* No need for _rcu here. All reconfiguration is |
543cc10b LE |
2036 | * strictly serialized on genl_lock(). We are protected against |
2037 | * concurrent reconfiguration/addition/deletion */ | |
80883197 | 2038 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
44ed167d | 2039 | struct net_conf *nc; |
80883197 | 2040 | if (oconn == tconn) |
b411b363 | 2041 | continue; |
44ed167d PR |
2042 | |
2043 | rcu_read_lock(); | |
2044 | nc = rcu_dereference(oconn->net_conf); | |
2045 | if (nc) { | |
2046 | taken_addr = (struct sockaddr *)&nc->my_addr; | |
2047 | if (new_conf->my_addr_len == nc->my_addr_len && | |
b411b363 PR |
2048 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
2049 | retcode = ERR_LOCAL_ADDR; | |
2050 | ||
44ed167d PR |
2051 | taken_addr = (struct sockaddr *)&nc->peer_addr; |
2052 | if (new_conf->peer_addr_len == nc->peer_addr_len && | |
b411b363 PR |
2053 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
2054 | retcode = ERR_PEER_ADDR; | |
b411b363 | 2055 | } |
44ed167d PR |
2056 | rcu_read_unlock(); |
2057 | if (retcode != NO_ERROR) | |
2058 | goto fail; | |
b411b363 PR |
2059 | } |
2060 | ||
0fd0ea06 PR |
2061 | retcode = alloc_crypto(&crypto, new_conf); |
2062 | if (retcode != NO_ERROR) | |
2063 | goto fail; | |
b411b363 | 2064 | |
b411b363 PR |
2065 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
2066 | ||
80883197 | 2067 | conn_flush_workqueue(tconn); |
91fd4dad | 2068 | |
a0095508 | 2069 | mutex_lock(&tconn->conf_update); |
91fd4dad PR |
2070 | old_conf = tconn->net_conf; |
2071 | if (old_conf) { | |
b411b363 | 2072 | retcode = ERR_NET_CONFIGURED; |
a0095508 | 2073 | mutex_unlock(&tconn->conf_update); |
b411b363 PR |
2074 | goto fail; |
2075 | } | |
44ed167d | 2076 | rcu_assign_pointer(tconn->net_conf, new_conf); |
b411b363 | 2077 | |
91fd4dad | 2078 | conn_free_crypto(tconn); |
0fd0ea06 PR |
2079 | tconn->int_dig_in = crypto.int_dig_in; |
2080 | tconn->int_dig_vv = crypto.int_dig_vv; | |
2081 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
8d412fc6 | 2082 | tconn->integrity_tfm = crypto.integrity_tfm; |
0fd0ea06 PR |
2083 | tconn->csums_tfm = crypto.csums_tfm; |
2084 | tconn->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2085 | |
a0095508 | 2086 | mutex_unlock(&tconn->conf_update); |
91fd4dad | 2087 | |
695d08fa | 2088 | rcu_read_lock(); |
80883197 PR |
2089 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2090 | mdev->send_cnt = 0; | |
2091 | mdev->recv_cnt = 0; | |
80883197 | 2092 | } |
695d08fa | 2093 | rcu_read_unlock(); |
5ee743e9 LE |
2094 | |
2095 | retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
2096 | ||
80883197 | 2097 | conn_reconfig_done(tconn); |
3b98c0c2 | 2098 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2099 | return 0; |
2100 | ||
2101 | fail: | |
0fd0ea06 | 2102 | free_crypto(&crypto); |
b411b363 PR |
2103 | kfree(new_conf); |
2104 | ||
80883197 | 2105 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2106 | out: |
2107 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2108 | return 0; |
2109 | } | |
2110 | ||
85f75dd7 LE |
2111 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2112 | { | |
2113 | enum drbd_state_rv rv; | |
85f75dd7 | 2114 | |
f3dfa40a LE |
2115 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2116 | force ? CS_HARD : 0); | |
85f75dd7 LE |
2117 | |
2118 | switch (rv) { | |
2119 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2120 | break; |
85f75dd7 LE |
2121 | case SS_ALREADY_STANDALONE: |
2122 | return SS_SUCCESS; | |
2123 | case SS_PRIMARY_NOP: | |
2124 | /* Our state checking code wants to see the peer outdated. */ | |
2125 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
f3dfa40a | 2126 | pdsk, D_OUTDATED), CS_VERBOSE); |
85f75dd7 LE |
2127 | break; |
2128 | case SS_CW_FAILED_BY_PEER: | |
2129 | /* The peer probably wants to see us outdated. */ | |
2130 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2131 | disk, D_OUTDATED), 0); | |
2132 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
f3dfa40a LE |
2133 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2134 | CS_HARD); | |
85f75dd7 LE |
2135 | } |
2136 | break; | |
2137 | default:; | |
2138 | /* no special handling necessary */ | |
2139 | } | |
2140 | ||
f3dfa40a LE |
2141 | if (rv >= SS_SUCCESS) { |
2142 | enum drbd_state_rv rv2; | |
2143 | /* No one else can reconfigure the network while I am here. | |
2144 | * The state handling only uses drbd_thread_stop_nowait(), | |
2145 | * we want to really wait here until the receiver is no more. | |
2146 | */ | |
2147 | drbd_thread_stop(&adm_ctx.tconn->receiver); | |
2148 | ||
2149 | /* Race breaker. This additional state change request may be | |
2150 | * necessary, if this was a forced disconnect during a receiver | |
2151 | * restart. We may have "killed" the receiver thread just | |
2152 | * after drbdd_init() returned. Typically, we should be | |
2153 | * C_STANDALONE already, now, and this becomes a no-op. | |
2154 | */ | |
2155 | rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE), | |
2156 | CS_VERBOSE | CS_HARD); | |
2157 | if (rv2 < SS_SUCCESS) | |
2158 | conn_err(tconn, | |
2159 | "unexpected rv2=%d in conn_try_disconnect()\n", | |
2160 | rv2); | |
2161 | } | |
85f75dd7 LE |
2162 | return rv; |
2163 | } | |
2164 | ||
3b98c0c2 | 2165 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2166 | { |
3b98c0c2 LE |
2167 | struct disconnect_parms parms; |
2168 | struct drbd_tconn *tconn; | |
85f75dd7 | 2169 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2170 | enum drbd_ret_code retcode; |
2171 | int err; | |
2561b9c1 | 2172 | |
3b98c0c2 LE |
2173 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2174 | if (!adm_ctx.reply_skb) | |
2175 | return retcode; | |
2176 | if (retcode != NO_ERROR) | |
2561b9c1 | 2177 | goto fail; |
3b98c0c2 LE |
2178 | |
2179 | tconn = adm_ctx.tconn; | |
2180 | memset(&parms, 0, sizeof(parms)); | |
2181 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2182 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2183 | if (err) { |
2184 | retcode = ERR_MANDATORY_TAG; | |
2185 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2186 | goto fail; | |
2187 | } | |
2561b9c1 PR |
2188 | } |
2189 | ||
85f75dd7 LE |
2190 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2191 | if (rv < SS_SUCCESS) | |
f3dfa40a LE |
2192 | retcode = rv; /* FIXME: Type mismatch. */ |
2193 | else | |
2194 | retcode = NO_ERROR; | |
b411b363 | 2195 | fail: |
3b98c0c2 | 2196 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2197 | return 0; |
2198 | } | |
2199 | ||
2200 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2201 | { | |
2202 | int iass; /* I am sync source */ | |
2203 | ||
2204 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2205 | if (mdev->state.role != mdev->state.peer) | |
2206 | iass = (mdev->state.role == R_PRIMARY); | |
2207 | else | |
25703f83 | 2208 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
2209 | |
2210 | if (iass) | |
2211 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2212 | else | |
2213 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2214 | } | |
2215 | ||
3b98c0c2 | 2216 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2217 | { |
daeda1cc | 2218 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 LE |
2219 | struct resize_parms rs; |
2220 | struct drbd_conf *mdev; | |
2221 | enum drbd_ret_code retcode; | |
b411b363 | 2222 | enum determine_dev_size dd; |
6495d2c6 | 2223 | enum dds_flags ddsf; |
daeda1cc | 2224 | sector_t u_size; |
3b98c0c2 | 2225 | int err; |
b411b363 | 2226 | |
3b98c0c2 LE |
2227 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2228 | if (!adm_ctx.reply_skb) | |
2229 | return retcode; | |
2230 | if (retcode != NO_ERROR) | |
b411b363 | 2231 | goto fail; |
3b98c0c2 LE |
2232 | |
2233 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2234 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2235 | err = resize_parms_from_attrs(&rs, info); |
3b98c0c2 LE |
2236 | if (err) { |
2237 | retcode = ERR_MANDATORY_TAG; | |
2238 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2239 | goto fail; | |
2240 | } | |
b411b363 PR |
2241 | } |
2242 | ||
3b98c0c2 | 2243 | mdev = adm_ctx.mdev; |
b411b363 PR |
2244 | if (mdev->state.conn > C_CONNECTED) { |
2245 | retcode = ERR_RESIZE_RESYNC; | |
2246 | goto fail; | |
2247 | } | |
2248 | ||
2249 | if (mdev->state.role == R_SECONDARY && | |
2250 | mdev->state.peer == R_SECONDARY) { | |
2251 | retcode = ERR_NO_PRIMARY; | |
2252 | goto fail; | |
2253 | } | |
2254 | ||
2255 | if (!get_ldev(mdev)) { | |
2256 | retcode = ERR_NO_DISK; | |
2257 | goto fail; | |
2258 | } | |
2259 | ||
31890f4a | 2260 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
2261 | retcode = ERR_NEED_APV_93; |
2262 | goto fail; | |
2263 | } | |
2264 | ||
daeda1cc PR |
2265 | rcu_read_lock(); |
2266 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
2267 | rcu_read_unlock(); | |
2268 | if (u_size != (sector_t)rs.resize_size) { | |
2269 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2270 | if (!new_disk_conf) { | |
2271 | retcode = ERR_NOMEM; | |
2272 | goto fail; | |
2273 | } | |
2274 | } | |
2275 | ||
087c2492 | 2276 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2277 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 | 2278 | |
daeda1cc PR |
2279 | if (new_disk_conf) { |
2280 | mutex_lock(&mdev->tconn->conf_update); | |
2281 | old_disk_conf = mdev->ldev->disk_conf; | |
2282 | *new_disk_conf = *old_disk_conf; | |
2283 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
2284 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); | |
2285 | mutex_unlock(&mdev->tconn->conf_update); | |
2286 | synchronize_rcu(); | |
2287 | kfree(old_disk_conf); | |
2288 | } | |
2289 | ||
6495d2c6 | 2290 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2291 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2292 | drbd_md_sync(mdev); |
2293 | put_ldev(mdev); | |
2294 | if (dd == dev_size_error) { | |
2295 | retcode = ERR_NOMEM_BITMAP; | |
2296 | goto fail; | |
2297 | } | |
2298 | ||
087c2492 | 2299 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2300 | if (dd == grew) |
2301 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2302 | ||
2303 | drbd_send_uuids(mdev); | |
6495d2c6 | 2304 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
2305 | } |
2306 | ||
2307 | fail: | |
3b98c0c2 | 2308 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2309 | return 0; |
2310 | } | |
2311 | ||
b966b5dd AG |
2312 | void drbd_set_res_opts_defaults(struct res_opts *r) |
2313 | { | |
2314 | return set_res_opts_defaults(r); | |
2315 | } | |
2316 | ||
f399002e | 2317 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2318 | { |
3b98c0c2 | 2319 | enum drbd_ret_code retcode; |
b411b363 | 2320 | cpumask_var_t new_cpu_mask; |
f399002e | 2321 | struct drbd_tconn *tconn; |
b57a1e27 | 2322 | struct res_opts res_opts; |
f399002e | 2323 | int err; |
b411b363 | 2324 | |
f399002e | 2325 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3b98c0c2 LE |
2326 | if (!adm_ctx.reply_skb) |
2327 | return retcode; | |
2328 | if (retcode != NO_ERROR) | |
2329 | goto fail; | |
f399002e | 2330 | tconn = adm_ctx.tconn; |
3b98c0c2 | 2331 | |
b411b363 PR |
2332 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
2333 | retcode = ERR_NOMEM; | |
3b98c0c2 | 2334 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
2335 | goto fail; |
2336 | } | |
2337 | ||
b57a1e27 | 2338 | res_opts = tconn->res_opts; |
5979e361 | 2339 | if (should_set_defaults(info)) |
b966b5dd | 2340 | set_res_opts_defaults(&res_opts); |
b411b363 | 2341 | |
b57a1e27 | 2342 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2343 | if (err && err != -ENOMSG) { |
b411b363 | 2344 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2345 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2346 | goto fail; |
2347 | } | |
2348 | ||
b411b363 | 2349 | /* silently ignore cpu mask on UP kernel */ |
b57a1e27 LE |
2350 | if (nr_cpu_ids > 1 && res_opts.cpu_mask[0] != 0) { |
2351 | err = __bitmap_parse(res_opts.cpu_mask, 32, 0, | |
b411b363 PR |
2352 | cpumask_bits(new_cpu_mask), nr_cpu_ids); |
2353 | if (err) { | |
f399002e | 2354 | conn_warn(tconn, "__bitmap_parse() failed with %d\n", err); |
b411b363 PR |
2355 | retcode = ERR_CPU_MASK_PARSE; |
2356 | goto fail; | |
2357 | } | |
2358 | } | |
2359 | ||
b411b363 | 2360 | |
b57a1e27 | 2361 | tconn->res_opts = res_opts; |
b411b363 | 2362 | |
f399002e LE |
2363 | if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) { |
2364 | cpumask_copy(tconn->cpu_mask, new_cpu_mask); | |
2365 | drbd_calc_cpu_mask(tconn); | |
2366 | tconn->receiver.reset_cpu_mask = 1; | |
2367 | tconn->asender.reset_cpu_mask = 1; | |
2368 | tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2369 | } |
2370 | ||
b411b363 PR |
2371 | fail: |
2372 | free_cpumask_var(new_cpu_mask); | |
3b98c0c2 LE |
2373 | |
2374 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2375 | return 0; |
2376 | } | |
2377 | ||
3b98c0c2 | 2378 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2379 | { |
3b98c0c2 LE |
2380 | struct drbd_conf *mdev; |
2381 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2382 | ||
2383 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2384 | if (!adm_ctx.reply_skb) | |
2385 | return retcode; | |
2386 | if (retcode != NO_ERROR) | |
2387 | goto out; | |
2388 | ||
2389 | mdev = adm_ctx.mdev; | |
b411b363 | 2390 | |
194bfb32 LE |
2391 | /* If there is still bitmap IO pending, probably because of a previous |
2392 | * resync just being finished, wait for it before requesting a new resync. */ | |
2393 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2394 | ||
b411b363 PR |
2395 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2396 | ||
2397 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2398 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2399 | ||
2400 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2401 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2402 | if (mdev->state.conn < C_CONNECTED) |
2403 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2404 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2405 | |
2406 | if (retcode != SS_NEED_CONNECTION) | |
2407 | break; | |
2408 | ||
2409 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2410 | } | |
2411 | ||
3b98c0c2 LE |
2412 | out: |
2413 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2414 | return 0; |
2415 | } | |
2416 | ||
0778286a PR |
2417 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2418 | { | |
2419 | int rv; | |
2420 | ||
2421 | rv = drbd_bmio_set_n_write(mdev); | |
2422 | drbd_suspend_al(mdev); | |
2423 | return rv; | |
2424 | } | |
2425 | ||
3b98c0c2 LE |
2426 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2427 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2428 | { |
3b98c0c2 | 2429 | enum drbd_ret_code retcode; |
194bfb32 | 2430 | |
3b98c0c2 LE |
2431 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2432 | if (!adm_ctx.reply_skb) | |
2433 | return retcode; | |
2434 | if (retcode != NO_ERROR) | |
2435 | goto out; | |
b411b363 | 2436 | |
3b98c0c2 LE |
2437 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2438 | out: | |
2439 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2440 | return 0; |
2441 | } | |
2442 | ||
3b98c0c2 | 2443 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2444 | { |
3b98c0c2 LE |
2445 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2446 | } | |
b411b363 | 2447 | |
3b98c0c2 LE |
2448 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2449 | { | |
2450 | enum drbd_ret_code retcode; | |
2451 | ||
2452 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2453 | if (!adm_ctx.reply_skb) | |
2454 | return retcode; | |
2455 | if (retcode != NO_ERROR) | |
2456 | goto out; | |
b411b363 | 2457 | |
3b98c0c2 LE |
2458 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2459 | retcode = ERR_PAUSE_IS_SET; | |
2460 | out: | |
2461 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2462 | return 0; |
2463 | } | |
2464 | ||
3b98c0c2 | 2465 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2466 | { |
da9fbc27 | 2467 | union drbd_dev_state s; |
3b98c0c2 LE |
2468 | enum drbd_ret_code retcode; |
2469 | ||
2470 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2471 | if (!adm_ctx.reply_skb) | |
2472 | return retcode; | |
2473 | if (retcode != NO_ERROR) | |
2474 | goto out; | |
b411b363 | 2475 | |
3b98c0c2 LE |
2476 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2477 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2478 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2479 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2480 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2481 | } else { | |
2482 | retcode = ERR_PAUSE_IS_CLEAR; | |
2483 | } | |
2484 | } | |
b411b363 | 2485 | |
3b98c0c2 LE |
2486 | out: |
2487 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2488 | return 0; |
2489 | } | |
2490 | ||
3b98c0c2 | 2491 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2492 | { |
3b98c0c2 | 2493 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2494 | } |
2495 | ||
3b98c0c2 | 2496 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2497 | { |
3b98c0c2 LE |
2498 | struct drbd_conf *mdev; |
2499 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2500 | ||
2501 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2502 | if (!adm_ctx.reply_skb) | |
2503 | return retcode; | |
2504 | if (retcode != NO_ERROR) | |
2505 | goto out; | |
2506 | ||
2507 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2508 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2509 | drbd_uuid_new_current(mdev); | |
2510 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2511 | } |
265be2d0 | 2512 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2513 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2514 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2515 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2516 | tl_clear(mdev->tconn); |
265be2d0 | 2517 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2518 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2519 | } |
2520 | drbd_resume_io(mdev); | |
2521 | ||
3b98c0c2 LE |
2522 | out: |
2523 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2524 | return 0; |
2525 | } | |
2526 | ||
3b98c0c2 | 2527 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2528 | { |
3b98c0c2 | 2529 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2530 | } |
2531 | ||
7c3063cc | 2532 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *resource_name, unsigned vnr) |
543cc10b LE |
2533 | { |
2534 | struct nlattr *nla; | |
2535 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2536 | if (!nla) | |
2537 | goto nla_put_failure; | |
2538 | if (vnr != VOLUME_UNSPECIFIED) | |
2539 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
7c3063cc | 2540 | NLA_PUT_STRING(skb, T_ctx_resource_name, resource_name); |
543cc10b LE |
2541 | nla_nest_end(skb, nla); |
2542 | return 0; | |
2543 | ||
2544 | nla_put_failure: | |
2545 | if (nla) | |
2546 | nla_nest_cancel(skb, nla); | |
2547 | return -EMSGSIZE; | |
2548 | } | |
2549 | ||
3b98c0c2 LE |
2550 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2551 | const struct sib_info *sib) | |
b411b363 | 2552 | { |
3b98c0c2 | 2553 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
44ed167d | 2554 | struct net_conf *nc; |
3b98c0c2 LE |
2555 | struct nlattr *nla; |
2556 | int got_ldev; | |
3b98c0c2 LE |
2557 | int err = 0; |
2558 | int exclude_sensitive; | |
2559 | ||
2560 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2561 | * to. So we better exclude_sensitive information. | |
2562 | * | |
2563 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2564 | * in the context of the requesting user process. Exclude sensitive | |
2565 | * information, unless current has superuser. | |
2566 | * | |
2567 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2568 | * relies on the current implementation of netlink_dump(), which | |
2569 | * executes the dump callback successively from netlink_recvmsg(), | |
2570 | * always in the context of the receiving process */ | |
2571 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2572 | ||
2573 | got_ldev = get_ldev(mdev); | |
3b98c0c2 LE |
2574 | |
2575 | /* We need to add connection name and volume number information still. | |
2576 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2577 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2578 | goto nla_put_failure; |
3b98c0c2 | 2579 | |
f399002e LE |
2580 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2581 | goto nla_put_failure; | |
2582 | ||
daeda1cc | 2583 | rcu_read_lock(); |
3b98c0c2 | 2584 | if (got_ldev) |
daeda1cc | 2585 | if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive)) |
3b98c0c2 | 2586 | goto nla_put_failure; |
44ed167d | 2587 | |
44ed167d PR |
2588 | nc = rcu_dereference(mdev->tconn->net_conf); |
2589 | if (nc) | |
2590 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2591 | rcu_read_unlock(); | |
2592 | if (err) | |
2593 | goto nla_put_failure; | |
3b98c0c2 | 2594 | |
3b98c0c2 LE |
2595 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2596 | if (!nla) | |
2597 | goto nla_put_failure; | |
2598 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2599 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2600 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2601 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2602 | ||
2603 | if (got_ldev) { | |
2604 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2605 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2606 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2607 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2608 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2609 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2610 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2611 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2612 | } | |
b411b363 PR |
2613 | } |
2614 | ||
3b98c0c2 LE |
2615 | if (sib) { |
2616 | switch(sib->sib_reason) { | |
2617 | case SIB_SYNC_PROGRESS: | |
2618 | case SIB_GET_STATUS_REPLY: | |
2619 | break; | |
2620 | case SIB_STATE_CHANGE: | |
2621 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2622 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2623 | break; | |
2624 | case SIB_HELPER_POST: | |
2625 | NLA_PUT_U32(skb, | |
2626 | T_helper_exit_code, sib->helper_exit_code); | |
2627 | /* fall through */ | |
2628 | case SIB_HELPER_PRE: | |
2629 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2630 | break; | |
2631 | } | |
b411b363 | 2632 | } |
3b98c0c2 | 2633 | nla_nest_end(skb, nla); |
b411b363 | 2634 | |
3b98c0c2 LE |
2635 | if (0) |
2636 | nla_put_failure: | |
2637 | err = -EMSGSIZE; | |
2638 | if (got_ldev) | |
2639 | put_ldev(mdev); | |
3b98c0c2 | 2640 | return err; |
b411b363 PR |
2641 | } |
2642 | ||
3b98c0c2 | 2643 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2644 | { |
3b98c0c2 LE |
2645 | enum drbd_ret_code retcode; |
2646 | int err; | |
b411b363 | 2647 | |
3b98c0c2 LE |
2648 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2649 | if (!adm_ctx.reply_skb) | |
2650 | return retcode; | |
2651 | if (retcode != NO_ERROR) | |
2652 | goto out; | |
b411b363 | 2653 | |
3b98c0c2 LE |
2654 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2655 | if (err) { | |
2656 | nlmsg_free(adm_ctx.reply_skb); | |
2657 | return err; | |
b411b363 | 2658 | } |
3b98c0c2 LE |
2659 | out: |
2660 | drbd_adm_finish(info, retcode); | |
2661 | return 0; | |
b411b363 PR |
2662 | } |
2663 | ||
71932efc | 2664 | int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2665 | { |
3b98c0c2 LE |
2666 | struct drbd_conf *mdev; |
2667 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2668 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2669 | struct drbd_tconn *tconn = NULL; | |
2670 | struct drbd_tconn *tmp; | |
2671 | unsigned volume = cb->args[1]; | |
2672 | ||
2673 | /* Open coded, deferred, iteration: | |
2674 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2675 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2676 | * ... | |
2677 | * } | |
2678 | * } | |
2679 | * where tconn is cb->args[0]; | |
2680 | * and i is cb->args[1]; | |
2681 | * | |
71932efc LE |
2682 | * cb->args[2] indicates if we shall loop over all resources, |
2683 | * or just dump all volumes of a single resource. | |
2684 | * | |
3b98c0c2 LE |
2685 | * This may miss entries inserted after this dump started, |
2686 | * or entries deleted before they are reached. | |
543cc10b LE |
2687 | * |
2688 | * We need to make sure the mdev won't disappear while | |
2689 | * we are looking at it, and revalidate our iterators | |
2690 | * on each iteration. | |
2691 | */ | |
3b98c0c2 | 2692 | |
9dc9fbb3 | 2693 | /* synchronize with conn_create()/conn_destroy() */ |
c141ebda | 2694 | rcu_read_lock(); |
543cc10b | 2695 | /* revalidate iterator position */ |
ec0bddbc | 2696 | list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) { |
543cc10b LE |
2697 | if (pos == NULL) { |
2698 | /* first iteration */ | |
2699 | pos = tmp; | |
2700 | tconn = pos; | |
2701 | break; | |
2702 | } | |
2703 | if (tmp == pos) { | |
2704 | tconn = pos; | |
2705 | break; | |
2706 | } | |
2707 | } | |
2708 | if (tconn) { | |
71932efc | 2709 | next_tconn: |
543cc10b LE |
2710 | mdev = idr_get_next(&tconn->volumes, &volume); |
2711 | if (!mdev) { | |
2712 | /* No more volumes to dump on this tconn. | |
2713 | * Advance tconn iterator. */ | |
ec0bddbc PR |
2714 | pos = list_entry_rcu(tconn->all_tconn.next, |
2715 | struct drbd_tconn, all_tconn); | |
71932efc | 2716 | /* Did we dump any volume on this tconn yet? */ |
543cc10b | 2717 | if (volume != 0) { |
71932efc LE |
2718 | /* If we reached the end of the list, |
2719 | * or only a single resource dump was requested, | |
2720 | * we are done. */ | |
2721 | if (&pos->all_tconn == &drbd_tconns || cb->args[2]) | |
2722 | goto out; | |
543cc10b | 2723 | volume = 0; |
71932efc | 2724 | tconn = pos; |
543cc10b LE |
2725 | goto next_tconn; |
2726 | } | |
2727 | } | |
2728 | ||
3b98c0c2 LE |
2729 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2730 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2731 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2732 | if (!dh) | |
543cc10b LE |
2733 | goto out; |
2734 | ||
2735 | if (!mdev) { | |
2736 | /* this is a tconn without a single volume */ | |
2737 | dh->minor = -1U; | |
2738 | dh->ret_code = NO_ERROR; | |
2739 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2740 | genlmsg_cancel(skb, dh); | |
2741 | else | |
2742 | genlmsg_end(skb, dh); | |
2743 | goto out; | |
2744 | } | |
3b98c0c2 | 2745 | |
543cc10b LE |
2746 | D_ASSERT(mdev->vnr == volume); |
2747 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2748 | |
543cc10b | 2749 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2750 | dh->ret_code = NO_ERROR; |
2751 | ||
2752 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2753 | genlmsg_cancel(skb, dh); | |
543cc10b | 2754 | goto out; |
3b98c0c2 LE |
2755 | } |
2756 | genlmsg_end(skb, dh); | |
2757 | } | |
b411b363 | 2758 | |
543cc10b | 2759 | out: |
c141ebda | 2760 | rcu_read_unlock(); |
543cc10b LE |
2761 | /* where to start the next iteration */ |
2762 | cb->args[0] = (long)pos; | |
2763 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2764 | |
543cc10b LE |
2765 | /* No more tconns/volumes/minors found results in an empty skb. |
2766 | * Which will terminate the dump. */ | |
3b98c0c2 | 2767 | return skb->len; |
b411b363 PR |
2768 | } |
2769 | ||
71932efc LE |
2770 | /* |
2771 | * Request status of all resources, or of all volumes within a single resource. | |
2772 | * | |
2773 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
2774 | * Which means we cannot use the family->attrbuf or other such members, because | |
2775 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
2776 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
2777 | * | |
2778 | * Once things are setup properly, we call into get_one_status(). | |
2779 | */ | |
2780 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) | |
2781 | { | |
2782 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
2783 | struct nlattr *nla; | |
7c3063cc | 2784 | const char *resource_name; |
71932efc | 2785 | struct drbd_tconn *tconn; |
7c3063cc | 2786 | int maxtype; |
71932efc LE |
2787 | |
2788 | /* Is this a followup call? */ | |
2789 | if (cb->args[0]) { | |
2790 | /* ... of a single resource dump, | |
2791 | * and the resource iterator has been advanced already? */ | |
2792 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
2793 | return 0; /* DONE. */ | |
2794 | goto dump; | |
2795 | } | |
2796 | ||
2797 | /* First call (from netlink_dump_start). We need to figure out | |
2798 | * which resource(s) the user wants us to dump. */ | |
2799 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
2800 | nlmsg_attrlen(cb->nlh, hdrlen), | |
2801 | DRBD_NLA_CFG_CONTEXT); | |
2802 | ||
2803 | /* No explicit context given. Dump all. */ | |
2804 | if (!nla) | |
2805 | goto dump; | |
7c3063cc AG |
2806 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
2807 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
2808 | if (IS_ERR(nla)) | |
2809 | return PTR_ERR(nla); | |
71932efc LE |
2810 | /* context given, but no name present? */ |
2811 | if (!nla) | |
2812 | return -EINVAL; | |
7c3063cc AG |
2813 | resource_name = nla_data(nla); |
2814 | tconn = conn_get_by_name(resource_name); | |
0ace9dfa | 2815 | |
71932efc LE |
2816 | if (!tconn) |
2817 | return -ENODEV; | |
2818 | ||
0ace9dfa PR |
2819 | kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */ |
2820 | ||
71932efc LE |
2821 | /* prime iterators, and set "filter" mode mark: |
2822 | * only dump this tconn. */ | |
2823 | cb->args[0] = (long)tconn; | |
2824 | /* cb->args[1] = 0; passed in this way. */ | |
2825 | cb->args[2] = (long)tconn; | |
2826 | ||
2827 | dump: | |
2828 | return get_one_status(skb, cb); | |
2829 | } | |
2830 | ||
3b98c0c2 | 2831 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2832 | { |
3b98c0c2 LE |
2833 | enum drbd_ret_code retcode; |
2834 | struct timeout_parms tp; | |
2835 | int err; | |
b411b363 | 2836 | |
3b98c0c2 LE |
2837 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2838 | if (!adm_ctx.reply_skb) | |
2839 | return retcode; | |
2840 | if (retcode != NO_ERROR) | |
2841 | goto out; | |
b411b363 | 2842 | |
3b98c0c2 LE |
2843 | tp.timeout_type = |
2844 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2845 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2846 | UT_DEFAULT; | |
b411b363 | 2847 | |
3b98c0c2 LE |
2848 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2849 | if (err) { | |
2850 | nlmsg_free(adm_ctx.reply_skb); | |
2851 | return err; | |
2852 | } | |
2853 | out: | |
2854 | drbd_adm_finish(info, retcode); | |
2855 | return 0; | |
b411b363 PR |
2856 | } |
2857 | ||
3b98c0c2 | 2858 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2859 | { |
3b98c0c2 LE |
2860 | struct drbd_conf *mdev; |
2861 | enum drbd_ret_code retcode; | |
b411b363 | 2862 | |
3b98c0c2 LE |
2863 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2864 | if (!adm_ctx.reply_skb) | |
2865 | return retcode; | |
2866 | if (retcode != NO_ERROR) | |
2867 | goto out; | |
873b0d5f | 2868 | |
3b98c0c2 LE |
2869 | mdev = adm_ctx.mdev; |
2870 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2871 | /* resume from last known position, if possible */ | |
2872 | struct start_ov_parms parms = | |
2873 | { .ov_start_sector = mdev->ov_start_sector }; | |
f399002e | 2874 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2875 | if (err) { |
2876 | retcode = ERR_MANDATORY_TAG; | |
2877 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2878 | goto out; | |
2879 | } | |
2880 | /* w_make_ov_request expects position to be aligned */ | |
2881 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2882 | } | |
873b0d5f LE |
2883 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2884 | * just being finished, wait for it before requesting a new resync. */ | |
2885 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2886 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2887 | out: | |
2888 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2889 | return 0; |
2890 | } | |
2891 | ||
2892 | ||
3b98c0c2 | 2893 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2894 | { |
3b98c0c2 LE |
2895 | struct drbd_conf *mdev; |
2896 | enum drbd_ret_code retcode; | |
b411b363 PR |
2897 | int skip_initial_sync = 0; |
2898 | int err; | |
3b98c0c2 | 2899 | struct new_c_uuid_parms args; |
b411b363 | 2900 | |
3b98c0c2 LE |
2901 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2902 | if (!adm_ctx.reply_skb) | |
2903 | return retcode; | |
2904 | if (retcode != NO_ERROR) | |
2905 | goto out_nolock; | |
b411b363 | 2906 | |
3b98c0c2 LE |
2907 | mdev = adm_ctx.mdev; |
2908 | memset(&args, 0, sizeof(args)); | |
2909 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 2910 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
2911 | if (err) { |
2912 | retcode = ERR_MANDATORY_TAG; | |
2913 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2914 | goto out_nolock; | |
2915 | } | |
b411b363 PR |
2916 | } |
2917 | ||
8410da8f | 2918 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2919 | |
2920 | if (!get_ldev(mdev)) { | |
2921 | retcode = ERR_NO_DISK; | |
2922 | goto out; | |
2923 | } | |
2924 | ||
2925 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2926 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2927 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2928 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2929 | skip_initial_sync = 1; | |
2930 | } else if (mdev->state.conn != C_STANDALONE) { | |
2931 | retcode = ERR_CONNECTED; | |
2932 | goto out_dec; | |
2933 | } | |
2934 | ||
2935 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2936 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2937 | ||
2938 | if (args.clear_bm) { | |
20ceb2b2 LE |
2939 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2940 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2941 | if (err) { |
2942 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2943 | retcode = ERR_IO_MD_DISK; | |
2944 | } | |
2945 | if (skip_initial_sync) { | |
2946 | drbd_send_uuids_skip_initial_sync(mdev); | |
2947 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2948 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2949 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2950 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2951 | CS_VERBOSE, NULL); | |
87eeee41 | 2952 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2953 | } |
2954 | } | |
2955 | ||
2956 | drbd_md_sync(mdev); | |
2957 | out_dec: | |
2958 | put_ldev(mdev); | |
2959 | out: | |
8410da8f | 2960 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2961 | out_nolock: |
2962 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2963 | return 0; |
2964 | } | |
2965 | ||
3b98c0c2 | 2966 | static enum drbd_ret_code |
7c3063cc | 2967 | drbd_check_resource_name(const char *name) |
774b3055 | 2968 | { |
3b98c0c2 | 2969 | if (!name || !name[0]) { |
7c3063cc | 2970 | drbd_msg_put_info("resource name missing"); |
3b98c0c2 | 2971 | return ERR_MANDATORY_TAG; |
774b3055 | 2972 | } |
3b98c0c2 LE |
2973 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2974 | * we must not allow slashes */ | |
2975 | if (strchr(name, '/')) { | |
7c3063cc | 2976 | drbd_msg_put_info("invalid resource name"); |
3b98c0c2 | 2977 | return ERR_INVALID_REQUEST; |
774b3055 | 2978 | } |
3b98c0c2 | 2979 | return NO_ERROR; |
774b3055 PR |
2980 | } |
2981 | ||
789c1b62 | 2982 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2983 | { |
3b98c0c2 | 2984 | enum drbd_ret_code retcode; |
9f5180e5 | 2985 | |
3b98c0c2 LE |
2986 | retcode = drbd_adm_prepare(skb, info, 0); |
2987 | if (!adm_ctx.reply_skb) | |
2988 | return retcode; | |
2989 | if (retcode != NO_ERROR) | |
2990 | goto out; | |
b411b363 | 2991 | |
7c3063cc | 2992 | retcode = drbd_check_resource_name(adm_ctx.resource_name); |
3b98c0c2 LE |
2993 | if (retcode != NO_ERROR) |
2994 | goto out; | |
b411b363 | 2995 | |
3b98c0c2 | 2996 | if (adm_ctx.tconn) { |
38f19616 LE |
2997 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2998 | retcode = ERR_INVALID_REQUEST; | |
789c1b62 | 2999 | drbd_msg_put_info("resource exists"); |
38f19616 LE |
3000 | } |
3001 | /* else: still NO_ERROR */ | |
3b98c0c2 | 3002 | goto out; |
b411b363 PR |
3003 | } |
3004 | ||
7c3063cc | 3005 | if (!conn_create(adm_ctx.resource_name)) |
b411b363 | 3006 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
3007 | out: |
3008 | drbd_adm_finish(info, retcode); | |
3009 | return 0; | |
b411b363 PR |
3010 | } |
3011 | ||
3b98c0c2 | 3012 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3013 | { |
3b98c0c2 LE |
3014 | struct drbd_genlmsghdr *dh = info->userhdr; |
3015 | enum drbd_ret_code retcode; | |
b411b363 | 3016 | |
3b98c0c2 LE |
3017 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3018 | if (!adm_ctx.reply_skb) | |
3019 | return retcode; | |
3020 | if (retcode != NO_ERROR) | |
3021 | goto out; | |
b411b363 | 3022 | |
3b98c0c2 LE |
3023 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
3024 | if (dh->minor >= minor_count) { | |
3025 | drbd_msg_put_info("requested minor out of range"); | |
3026 | retcode = ERR_INVALID_REQUEST; | |
3027 | goto out; | |
b411b363 | 3028 | } |
0c8e36d9 | 3029 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
3030 | drbd_msg_put_info("requested volume id out of range"); |
3031 | retcode = ERR_INVALID_REQUEST; | |
3032 | goto out; | |
b411b363 | 3033 | } |
b411b363 | 3034 | |
38f19616 LE |
3035 | /* drbd_adm_prepare made sure already |
3036 | * that mdev->tconn and mdev->vnr match the request. */ | |
3037 | if (adm_ctx.mdev) { | |
3038 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
3039 | retcode = ERR_MINOR_EXISTS; | |
3040 | /* else: still NO_ERROR */ | |
3041 | goto out; | |
3042 | } | |
3043 | ||
3b98c0c2 LE |
3044 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
3045 | out: | |
3046 | drbd_adm_finish(info, retcode); | |
3047 | return 0; | |
b411b363 PR |
3048 | } |
3049 | ||
85f75dd7 LE |
3050 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
3051 | { | |
3052 | if (mdev->state.disk == D_DISKLESS && | |
3053 | /* no need to be mdev->state.conn == C_STANDALONE && | |
3054 | * we may want to delete a minor from a live replication group. | |
3055 | */ | |
3056 | mdev->state.role == R_SECONDARY) { | |
81fa2e67 PR |
3057 | idr_remove(&mdev->tconn->volumes, mdev->vnr); |
3058 | idr_remove(&minors, mdev_to_minor(mdev)); | |
3059 | del_gendisk(mdev->vdisk); | |
3060 | synchronize_rcu(); | |
3061 | kref_put(&mdev->kref, &drbd_minor_destroy); | |
85f75dd7 LE |
3062 | return NO_ERROR; |
3063 | } else | |
3064 | return ERR_MINOR_CONFIGURED; | |
3065 | } | |
3066 | ||
3b98c0c2 | 3067 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3068 | { |
3b98c0c2 | 3069 | enum drbd_ret_code retcode; |
b411b363 | 3070 | |
3b98c0c2 LE |
3071 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
3072 | if (!adm_ctx.reply_skb) | |
3073 | return retcode; | |
3074 | if (retcode != NO_ERROR) | |
3075 | goto out; | |
b411b363 | 3076 | |
85f75dd7 | 3077 | retcode = adm_delete_minor(adm_ctx.mdev); |
85f75dd7 LE |
3078 | out: |
3079 | drbd_adm_finish(info, retcode); | |
3080 | return 0; | |
3081 | } | |
3082 | ||
3083 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
3084 | { | |
f3dfa40a | 3085 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 LE |
3086 | struct drbd_conf *mdev; |
3087 | unsigned i; | |
3088 | ||
3089 | retcode = drbd_adm_prepare(skb, info, 0); | |
3090 | if (!adm_ctx.reply_skb) | |
3091 | return retcode; | |
3092 | if (retcode != NO_ERROR) | |
3093 | goto out; | |
3094 | ||
3095 | if (!adm_ctx.tconn) { | |
789c1b62 | 3096 | retcode = ERR_RES_NOT_KNOWN; |
85f75dd7 LE |
3097 | goto out; |
3098 | } | |
3099 | ||
85f75dd7 LE |
3100 | /* demote */ |
3101 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3102 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
3103 | if (retcode < SS_SUCCESS) { | |
3104 | drbd_msg_put_info("failed to demote"); | |
c141ebda | 3105 | goto out; |
85f75dd7 LE |
3106 | } |
3107 | } | |
3108 | ||
f3dfa40a LE |
3109 | retcode = conn_try_disconnect(adm_ctx.tconn, 0); |
3110 | if (retcode < SS_SUCCESS) { | |
85f75dd7 | 3111 | drbd_msg_put_info("failed to disconnect"); |
f3dfa40a | 3112 | goto out; |
85f75dd7 LE |
3113 | } |
3114 | ||
3115 | /* detach */ | |
3116 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
f3dfa40a LE |
3117 | retcode = adm_detach(mdev); |
3118 | if (retcode < SS_SUCCESS) { | |
85f75dd7 | 3119 | drbd_msg_put_info("failed to detach"); |
c141ebda | 3120 | goto out; |
85f75dd7 LE |
3121 | } |
3122 | } | |
3123 | ||
f3dfa40a LE |
3124 | /* If we reach this, all volumes (of this tconn) are Secondary, |
3125 | * Disconnected, Diskless, aka Unconfigured. Make sure all threads have | |
c141ebda | 3126 | * actually stopped, state handling only does drbd_thread_stop_nowait(). */ |
f3dfa40a LE |
3127 | drbd_thread_stop(&adm_ctx.tconn->worker); |
3128 | ||
3129 | /* Now, nothing can fail anymore */ | |
3130 | ||
85f75dd7 LE |
3131 | /* delete volumes */ |
3132 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3133 | retcode = adm_delete_minor(mdev); | |
3134 | if (retcode != NO_ERROR) { | |
3135 | /* "can not happen" */ | |
3136 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 | 3137 | goto out; |
85f75dd7 LE |
3138 | } |
3139 | } | |
3140 | ||
85f75dd7 LE |
3141 | /* delete connection */ |
3142 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3143 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3144 | synchronize_rcu(); | |
9dc9fbb3 PR |
3145 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3146 | ||
85f75dd7 LE |
3147 | retcode = NO_ERROR; |
3148 | } else { | |
3149 | /* "can not happen" */ | |
789c1b62 | 3150 | retcode = ERR_RES_IN_USE; |
85f75dd7 | 3151 | drbd_msg_put_info("failed to delete connection"); |
85f75dd7 | 3152 | } |
ef356262 | 3153 | goto out; |
3b98c0c2 LE |
3154 | out: |
3155 | drbd_adm_finish(info, retcode); | |
3156 | return 0; | |
b411b363 PR |
3157 | } |
3158 | ||
789c1b62 | 3159 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3160 | { |
3b98c0c2 | 3161 | enum drbd_ret_code retcode; |
b411b363 | 3162 | |
3b98c0c2 LE |
3163 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3164 | if (!adm_ctx.reply_skb) | |
3165 | return retcode; | |
3166 | if (retcode != NO_ERROR) | |
3167 | goto out; | |
3168 | ||
3169 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3170 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3171 | synchronize_rcu(); | |
9dc9fbb3 PR |
3172 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3173 | ||
3b98c0c2 LE |
3174 | retcode = NO_ERROR; |
3175 | } else { | |
789c1b62 | 3176 | retcode = ERR_RES_IN_USE; |
b411b363 PR |
3177 | } |
3178 | ||
992d6e91 LE |
3179 | if (retcode == NO_ERROR) |
3180 | drbd_thread_stop(&adm_ctx.tconn->worker); | |
3b98c0c2 LE |
3181 | out: |
3182 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3183 | return 0; |
3184 | } | |
3185 | ||
3b98c0c2 | 3186 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3187 | { |
3b98c0c2 LE |
3188 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3189 | struct sk_buff *msg; | |
3190 | struct drbd_genlmsghdr *d_out; | |
3191 | unsigned seq; | |
3192 | int err = -ENOMEM; | |
3193 | ||
3194 | seq = atomic_inc_return(&drbd_genl_seq); | |
3195 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3196 | if (!msg) | |
3197 | goto failed; | |
3198 | ||
3199 | err = -EMSGSIZE; | |
3200 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3201 | if (!d_out) /* cannot happen, but anyways. */ | |
3202 | goto nla_put_failure; | |
3203 | d_out->minor = mdev_to_minor(mdev); | |
6f9b5f84 | 3204 | d_out->ret_code = NO_ERROR; |
3b98c0c2 LE |
3205 | |
3206 | if (nla_put_status_info(msg, mdev, sib)) | |
3207 | goto nla_put_failure; | |
3208 | genlmsg_end(msg, d_out); | |
3209 | err = drbd_genl_multicast_events(msg, 0); | |
3210 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3211 | if (err && err != -ESRCH) | |
3212 | goto failed; | |
b411b363 | 3213 | |
3b98c0c2 | 3214 | return; |
b411b363 | 3215 | |
3b98c0c2 LE |
3216 | nla_put_failure: |
3217 | nlmsg_free(msg); | |
3218 | failed: | |
3219 | dev_err(DEV, "Error %d while broadcasting event. " | |
3220 | "Event seq:%u sib_reason:%u\n", | |
3221 | err, seq, sib->sib_reason); | |
b411b363 | 3222 | } |