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; |
089c075d AG |
97 | struct nlattr *my_addr; |
98 | struct nlattr *peer_addr; | |
3b98c0c2 LE |
99 | |
100 | /* reply buffer */ | |
101 | struct sk_buff *reply_skb; | |
102 | /* pointer into reply buffer */ | |
103 | struct drbd_genlmsghdr *reply_dh; | |
104 | /* resolved from attributes, if possible */ | |
105 | struct drbd_conf *mdev; | |
106 | struct drbd_tconn *tconn; | |
107 | } adm_ctx; | |
108 | ||
109 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
110 | { | |
111 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
112 | if (genlmsg_reply(skb, info)) | |
113 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 114 | } |
3b98c0c2 LE |
115 | |
116 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
117 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 118 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
119 | { |
120 | struct sk_buff *skb = adm_ctx.reply_skb; | |
121 | struct nlattr *nla; | |
122 | int err = -EMSGSIZE; | |
123 | ||
124 | if (!info || !info[0]) | |
125 | return 0; | |
126 | ||
127 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
128 | if (!nla) | |
129 | return err; | |
130 | ||
131 | err = nla_put_string(skb, T_info_text, info); | |
132 | if (err) { | |
133 | nla_nest_cancel(skb, nla); | |
134 | return err; | |
135 | } else | |
136 | nla_nest_end(skb, nla); | |
137 | return 0; | |
b411b363 PR |
138 | } |
139 | ||
3b98c0c2 LE |
140 | /* This would be a good candidate for a "pre_doit" hook, |
141 | * and per-family private info->pointers. | |
142 | * But we need to stay compatible with older kernels. | |
143 | * If it returns successfully, adm_ctx members are valid. | |
144 | */ | |
145 | #define DRBD_ADM_NEED_MINOR 1 | |
44e52cfa | 146 | #define DRBD_ADM_NEED_RESOURCE 2 |
089c075d | 147 | #define DRBD_ADM_NEED_CONNECTION 4 |
3b98c0c2 LE |
148 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, |
149 | unsigned flags) | |
150 | { | |
151 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
152 | const u8 cmd = info->genlhdr->cmd; | |
153 | int err; | |
154 | ||
155 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
156 | ||
157 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
158 | if (cmd != DRBD_ADM_GET_STATUS | |
159 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
160 | return -EPERM; | |
161 | ||
162 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1e2a2551 AG |
163 | if (!adm_ctx.reply_skb) { |
164 | err = -ENOMEM; | |
3b98c0c2 | 165 | goto fail; |
1e2a2551 | 166 | } |
3b98c0c2 LE |
167 | |
168 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
169 | info, &drbd_genl_family, 0, cmd); | |
170 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
171 | * but anyways */ | |
1e2a2551 AG |
172 | if (!adm_ctx.reply_dh) { |
173 | err = -ENOMEM; | |
3b98c0c2 | 174 | goto fail; |
1e2a2551 | 175 | } |
3b98c0c2 LE |
176 | |
177 | adm_ctx.reply_dh->minor = d_in->minor; | |
178 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
179 | ||
089c075d | 180 | adm_ctx.volume = VOLUME_UNSPECIFIED; |
3b98c0c2 LE |
181 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { |
182 | struct nlattr *nla; | |
183 | /* parse and validate only */ | |
f399002e | 184 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
185 | if (err) |
186 | goto fail; | |
187 | ||
188 | /* It was present, and valid, | |
189 | * copy it over to the reply skb. */ | |
190 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
191 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
192 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
193 | if (err) | |
194 | goto fail; | |
195 | ||
196 | /* and assign stuff to the global adm_ctx */ | |
197 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
089c075d AG |
198 | if (nla) |
199 | adm_ctx.volume = nla_get_u32(nla); | |
7c3063cc | 200 | nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
3b98c0c2 | 201 | if (nla) |
7c3063cc | 202 | adm_ctx.resource_name = nla_data(nla); |
089c075d AG |
203 | adm_ctx.my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)]; |
204 | adm_ctx.peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)]; | |
205 | if ((adm_ctx.my_addr && | |
206 | nla_len(adm_ctx.my_addr) > sizeof(adm_ctx.tconn->my_addr)) || | |
207 | (adm_ctx.peer_addr && | |
208 | nla_len(adm_ctx.peer_addr) > sizeof(adm_ctx.tconn->peer_addr))) { | |
209 | err = -EINVAL; | |
210 | goto fail; | |
211 | } | |
212 | } | |
3b98c0c2 LE |
213 | |
214 | adm_ctx.minor = d_in->minor; | |
215 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
7c3063cc | 216 | adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name); |
3b98c0c2 LE |
217 | |
218 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
219 | drbd_msg_put_info("unknown minor"); | |
220 | return ERR_MINOR_INVALID; | |
221 | } | |
44e52cfa AG |
222 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_RESOURCE)) { |
223 | drbd_msg_put_info("unknown resource"); | |
3b98c0c2 LE |
224 | return ERR_INVALID_REQUEST; |
225 | } | |
226 | ||
089c075d AG |
227 | if (flags & DRBD_ADM_NEED_CONNECTION) { |
228 | if (adm_ctx.tconn && !(flags & DRBD_ADM_NEED_RESOURCE)) { | |
229 | drbd_msg_put_info("no resource name expected"); | |
230 | return ERR_INVALID_REQUEST; | |
231 | } | |
232 | if (adm_ctx.mdev) { | |
233 | drbd_msg_put_info("no minor number expected"); | |
234 | return ERR_INVALID_REQUEST; | |
235 | } | |
236 | if (adm_ctx.my_addr && adm_ctx.peer_addr) | |
237 | adm_ctx.tconn = conn_get_by_addrs(nla_data(adm_ctx.my_addr), | |
238 | nla_len(adm_ctx.my_addr), | |
239 | nla_data(adm_ctx.peer_addr), | |
240 | nla_len(adm_ctx.peer_addr)); | |
241 | if (!adm_ctx.tconn) { | |
242 | drbd_msg_put_info("unknown connection"); | |
243 | return ERR_INVALID_REQUEST; | |
244 | } | |
245 | } | |
246 | ||
3b98c0c2 | 247 | /* some more paranoia, if the request was over-determined */ |
527f4b24 LE |
248 | if (adm_ctx.mdev && adm_ctx.tconn && |
249 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
44e52cfa | 250 | pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n", |
7c3063cc AG |
251 | adm_ctx.minor, adm_ctx.resource_name, |
252 | adm_ctx.mdev->tconn->name); | |
44e52cfa | 253 | drbd_msg_put_info("minor exists in different resource"); |
527f4b24 LE |
254 | return ERR_INVALID_REQUEST; |
255 | } | |
3b98c0c2 LE |
256 | if (adm_ctx.mdev && |
257 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
258 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
259 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
260 | adm_ctx.minor, adm_ctx.volume, | |
261 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 262 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
263 | return ERR_INVALID_REQUEST; |
264 | } | |
0ace9dfa | 265 | |
3b98c0c2 LE |
266 | return NO_ERROR; |
267 | ||
268 | fail: | |
269 | nlmsg_free(adm_ctx.reply_skb); | |
270 | adm_ctx.reply_skb = NULL; | |
1e2a2551 | 271 | return err; |
3b98c0c2 LE |
272 | } |
273 | ||
274 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
275 | { | |
0ace9dfa PR |
276 | if (adm_ctx.tconn) { |
277 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
278 | adm_ctx.tconn = NULL; | |
279 | } | |
280 | ||
3b98c0c2 LE |
281 | if (!adm_ctx.reply_skb) |
282 | return -ENOMEM; | |
283 | ||
284 | adm_ctx.reply_dh->ret_code = retcode; | |
3b98c0c2 LE |
285 | drbd_adm_send_reply(adm_ctx.reply_skb, info); |
286 | return 0; | |
287 | } | |
b411b363 | 288 | |
6b75dced | 289 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 290 | { |
6b75dced | 291 | char *afs; |
b411b363 | 292 | |
089c075d AG |
293 | /* FIXME: A future version will not allow this case. */ |
294 | if (tconn->my_addr_len == 0 || tconn->peer_addr_len == 0) | |
295 | return; | |
296 | ||
297 | switch (((struct sockaddr *)&tconn->peer_addr)->sa_family) { | |
298 | case AF_INET6: | |
299 | afs = "ipv6"; | |
300 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", | |
301 | &((struct sockaddr_in6 *)&tconn->peer_addr)->sin6_addr); | |
302 | break; | |
303 | case AF_INET: | |
304 | afs = "ipv4"; | |
305 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
306 | &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr); | |
307 | break; | |
308 | default: | |
309 | afs = "ssocks"; | |
310 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
311 | &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr); | |
b411b363 | 312 | } |
089c075d | 313 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
6b75dced PR |
314 | } |
315 | ||
316 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
317 | { | |
318 | char *envp[] = { "HOME=/", | |
319 | "TERM=linux", | |
320 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
321 | (char[20]) { }, /* address family */ | |
322 | (char[60]) { }, /* address */ | |
323 | NULL }; | |
324 | char mb[12]; | |
325 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
326 | struct sib_info sib; | |
327 | int ret; | |
328 | ||
329 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
330 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 331 | |
1090c056 LE |
332 | /* The helper may take some time. |
333 | * write out any unsynced meta data changes now */ | |
334 | drbd_md_sync(mdev); | |
335 | ||
b411b363 | 336 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
337 | sib.sib_reason = SIB_HELPER_PRE; |
338 | sib.helper_name = cmd; | |
339 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
340 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
341 | if (ret) | |
342 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
343 | usermode_helper, cmd, mb, | |
344 | (ret >> 8) & 0xff, ret); | |
345 | else | |
346 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
347 | usermode_helper, cmd, mb, | |
348 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
349 | sib.sib_reason = SIB_HELPER_POST; |
350 | sib.helper_exit_code = ret; | |
351 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
352 | |
353 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
354 | ret = 0; | |
355 | ||
356 | return ret; | |
357 | } | |
358 | ||
6b75dced PR |
359 | static void conn_md_sync(struct drbd_tconn *tconn) |
360 | { | |
361 | struct drbd_conf *mdev; | |
e90285e0 | 362 | int vnr; |
6b75dced | 363 | |
c141ebda PR |
364 | rcu_read_lock(); |
365 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
366 | kref_get(&mdev->kref); | |
367 | rcu_read_unlock(); | |
6b75dced | 368 | drbd_md_sync(mdev); |
c141ebda PR |
369 | kref_put(&mdev->kref, &drbd_minor_destroy); |
370 | rcu_read_lock(); | |
371 | } | |
372 | rcu_read_unlock(); | |
6b75dced PR |
373 | } |
374 | ||
375 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
376 | { | |
377 | char *envp[] = { "HOME=/", | |
378 | "TERM=linux", | |
379 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
380 | (char[20]) { }, /* address family */ | |
381 | (char[60]) { }, /* address */ | |
382 | NULL }; | |
383 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
384 | int ret; | |
385 | ||
386 | setup_khelper_env(tconn, envp); | |
387 | conn_md_sync(tconn); | |
388 | ||
389 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
390 | /* TODO: conn_bcast_event() ?? */ | |
391 | ||
392 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
393 | if (ret) | |
394 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
395 | usermode_helper, cmd, tconn->name, | |
396 | (ret >> 8) & 0xff, ret); | |
397 | else | |
398 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
399 | usermode_helper, cmd, tconn->name, | |
400 | (ret >> 8) & 0xff, ret); | |
401 | /* TODO: conn_bcast_event() ?? */ | |
402 | ||
403 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
404 | ret = 0; | |
405 | ||
406 | return ret; | |
407 | } | |
408 | ||
cb703454 | 409 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 410 | { |
cb703454 PR |
411 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
412 | struct drbd_conf *mdev; | |
413 | int vnr; | |
414 | ||
695d08fa | 415 | rcu_read_lock(); |
cb703454 PR |
416 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
417 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
daeda1cc PR |
418 | fp = max_t(enum drbd_fencing_p, fp, |
419 | rcu_dereference(mdev->ldev->disk_conf)->fencing); | |
cb703454 PR |
420 | put_ldev(mdev); |
421 | } | |
422 | } | |
695d08fa | 423 | rcu_read_unlock(); |
cb703454 PR |
424 | |
425 | return fp; | |
426 | } | |
427 | ||
428 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
429 | { | |
430 | union drbd_state mask = { }; | |
431 | union drbd_state val = { }; | |
432 | enum drbd_fencing_p fp; | |
b411b363 PR |
433 | char *ex_to_string; |
434 | int r; | |
b411b363 | 435 | |
cb703454 PR |
436 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
437 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
438 | return false; | |
439 | } | |
b411b363 | 440 | |
cb703454 PR |
441 | fp = highest_fencing_policy(tconn); |
442 | switch (fp) { | |
443 | case FP_NOT_AVAIL: | |
444 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 445 | goto out; |
cb703454 PR |
446 | case FP_DONT_CARE: |
447 | return true; | |
448 | default: ; | |
b411b363 PR |
449 | } |
450 | ||
cb703454 | 451 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
452 | |
453 | switch ((r>>8) & 0xff) { | |
454 | case 3: /* peer is inconsistent */ | |
455 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
456 | mask.pdsk = D_MASK; |
457 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
458 | break; |
459 | case 4: /* peer got outdated, or was already outdated */ | |
460 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
461 | mask.pdsk = D_MASK; |
462 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
463 | break; |
464 | case 5: /* peer was down */ | |
cb703454 | 465 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
466 | /* we will(have) create(d) a new UUID anyways... */ |
467 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
468 | mask.pdsk = D_MASK; |
469 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
470 | } else { |
471 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
472 | } |
473 | break; | |
474 | case 6: /* Peer is primary, voluntarily outdate myself. | |
475 | * This is useful when an unconnected R_SECONDARY is asked to | |
476 | * become R_PRIMARY, but finds the other peer being active. */ | |
477 | ex_to_string = "peer is active"; | |
cb703454 PR |
478 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
479 | mask.disk = D_MASK; | |
480 | val.disk = D_OUTDATED; | |
b411b363 PR |
481 | break; |
482 | case 7: | |
483 | if (fp != FP_STONITH) | |
cb703454 | 484 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 485 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
486 | mask.pdsk = D_MASK; |
487 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
488 | break; |
489 | default: | |
490 | /* The script is broken ... */ | |
cb703454 PR |
491 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
492 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
493 | } |
494 | ||
cb703454 PR |
495 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
496 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 497 | |
cb703454 | 498 | out: |
fb22c402 | 499 | |
cb703454 PR |
500 | /* Not using |
501 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
502 | here, because we might were able to re-establish the connection in the | |
503 | meantime. */ | |
504 | spin_lock_irq(&tconn->req_lock); | |
a1096a6e | 505 | if (tconn->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &tconn->flags)) |
cb703454 PR |
506 | _conn_request_state(tconn, mask, val, CS_VERBOSE); |
507 | spin_unlock_irq(&tconn->req_lock); | |
508 | ||
509 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
510 | } |
511 | ||
87f7be4c PR |
512 | static int _try_outdate_peer_async(void *data) |
513 | { | |
cb703454 | 514 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 515 | |
cb703454 | 516 | conn_try_outdate_peer(tconn); |
87f7be4c | 517 | |
9dc9fbb3 | 518 | kref_put(&tconn->kref, &conn_destroy); |
87f7be4c PR |
519 | return 0; |
520 | } | |
521 | ||
cb703454 | 522 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
523 | { |
524 | struct task_struct *opa; | |
525 | ||
9dc9fbb3 | 526 | kref_get(&tconn->kref); |
cb703454 | 527 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
9dc9fbb3 | 528 | if (IS_ERR(opa)) { |
cb703454 | 529 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
9dc9fbb3 PR |
530 | kref_put(&tconn->kref, &conn_destroy); |
531 | } | |
87f7be4c | 532 | } |
b411b363 | 533 | |
bf885f8a AG |
534 | enum drbd_state_rv |
535 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
536 | { |
537 | const int max_tries = 4; | |
bf885f8a | 538 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 539 | struct net_conf *nc; |
b411b363 PR |
540 | int try = 0; |
541 | int forced = 0; | |
542 | union drbd_state mask, val; | |
b411b363 PR |
543 | |
544 | if (new_role == R_PRIMARY) | |
0625ac19 | 545 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 546 | |
8410da8f | 547 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
548 | |
549 | mask.i = 0; mask.role = R_MASK; | |
550 | val.i = 0; val.role = new_role; | |
551 | ||
552 | while (try++ < max_tries) { | |
bf885f8a | 553 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
554 | |
555 | /* in case we first succeeded to outdate, | |
556 | * but now suddenly could establish a connection */ | |
bf885f8a | 557 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
558 | val.pdsk = 0; |
559 | mask.pdsk = 0; | |
560 | continue; | |
561 | } | |
562 | ||
bf885f8a | 563 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
564 | (mdev->state.disk < D_UP_TO_DATE && |
565 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
566 | mask.disk = D_MASK; |
567 | val.disk = D_UP_TO_DATE; | |
568 | forced = 1; | |
569 | continue; | |
570 | } | |
571 | ||
bf885f8a | 572 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
573 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
574 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 575 | |
cb703454 | 576 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
577 | val.disk = D_UP_TO_DATE; |
578 | mask.disk = D_MASK; | |
579 | } | |
b411b363 PR |
580 | continue; |
581 | } | |
582 | ||
bf885f8a | 583 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 584 | goto out; |
bf885f8a | 585 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 586 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 587 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
588 | mask.pdsk = D_MASK; |
589 | val.pdsk = D_OUTDATED; | |
b411b363 | 590 | |
cb703454 | 591 | } |
b411b363 PR |
592 | continue; |
593 | } | |
bf885f8a | 594 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
595 | /* Maybe the peer is detected as dead very soon... |
596 | retry at most once more in this case. */ | |
44ed167d PR |
597 | int timeo; |
598 | rcu_read_lock(); | |
599 | nc = rcu_dereference(mdev->tconn->net_conf); | |
600 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
601 | rcu_read_unlock(); | |
602 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
603 | if (try < max_tries) |
604 | try = max_tries - 1; | |
605 | continue; | |
606 | } | |
bf885f8a AG |
607 | if (rv < SS_SUCCESS) { |
608 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 609 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 610 | if (rv < SS_SUCCESS) |
3b98c0c2 | 611 | goto out; |
b411b363 PR |
612 | } |
613 | break; | |
614 | } | |
615 | ||
bf885f8a | 616 | if (rv < SS_SUCCESS) |
3b98c0c2 | 617 | goto out; |
b411b363 PR |
618 | |
619 | if (forced) | |
620 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
621 | ||
622 | /* Wait until nothing is on the fly :) */ | |
623 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
624 | ||
b6dd1a89 LE |
625 | /* FIXME also wait for all pending P_BARRIER_ACK? */ |
626 | ||
b411b363 | 627 | if (new_role == R_SECONDARY) { |
81e84650 | 628 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
629 | if (get_ldev(mdev)) { |
630 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
631 | put_ldev(mdev); | |
632 | } | |
633 | } else { | |
a0095508 | 634 | mutex_lock(&mdev->tconn->conf_update); |
91fd4dad | 635 | nc = mdev->tconn->net_conf; |
44ed167d | 636 | if (nc) |
6139f60d | 637 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
a0095508 | 638 | mutex_unlock(&mdev->tconn->conf_update); |
91fd4dad | 639 | |
81e84650 | 640 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
641 | if (get_ldev(mdev)) { |
642 | if (((mdev->state.conn < C_CONNECTED || | |
643 | mdev->state.pdsk <= D_FAILED) | |
644 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
645 | drbd_uuid_new_current(mdev); | |
646 | ||
647 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
648 | put_ldev(mdev); | |
649 | } | |
650 | } | |
651 | ||
19f843aa LE |
652 | /* writeout of activity log covered areas of the bitmap |
653 | * to stable storage done in after state change already */ | |
b411b363 PR |
654 | |
655 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
656 | /* if this was forced, we should consider sync */ | |
657 | if (forced) | |
658 | drbd_send_uuids(mdev); | |
43de7c85 | 659 | drbd_send_current_state(mdev); |
b411b363 PR |
660 | } |
661 | ||
662 | drbd_md_sync(mdev); | |
663 | ||
664 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 665 | out: |
8410da8f | 666 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 667 | return rv; |
b411b363 PR |
668 | } |
669 | ||
3b98c0c2 | 670 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 671 | { |
3b98c0c2 LE |
672 | return err == -ENOMSG ? "required attribute missing" : |
673 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 674 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 675 | "invalid attribute value"; |
b411b363 PR |
676 | } |
677 | ||
3b98c0c2 | 678 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 679 | { |
3b98c0c2 LE |
680 | struct set_role_parms parms; |
681 | int err; | |
682 | enum drbd_ret_code retcode; | |
b411b363 | 683 | |
3b98c0c2 LE |
684 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
685 | if (!adm_ctx.reply_skb) | |
686 | return retcode; | |
687 | if (retcode != NO_ERROR) | |
688 | goto out; | |
689 | ||
690 | memset(&parms, 0, sizeof(parms)); | |
691 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 692 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
693 | if (err) { |
694 | retcode = ERR_MANDATORY_TAG; | |
695 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
696 | goto out; | |
697 | } | |
698 | } | |
699 | ||
700 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
701 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
702 | else | |
703 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
704 | out: | |
705 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
706 | return 0; |
707 | } | |
708 | ||
709 | /* initializes the md.*_offset members, so we are able to find | |
710 | * the on disk meta data */ | |
711 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
712 | struct drbd_backing_dev *bdev) | |
713 | { | |
714 | sector_t md_size_sect = 0; | |
daeda1cc PR |
715 | int meta_dev_idx; |
716 | ||
717 | rcu_read_lock(); | |
718 | meta_dev_idx = rcu_dereference(bdev->disk_conf)->meta_dev_idx; | |
719 | ||
720 | switch (meta_dev_idx) { | |
b411b363 PR |
721 | default: |
722 | /* v07 style fixed size indexed meta data */ | |
723 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
724 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
725 | bdev->md.al_offset = MD_AL_OFFSET; | |
726 | bdev->md.bm_offset = MD_BM_OFFSET; | |
727 | break; | |
728 | case DRBD_MD_INDEX_FLEX_EXT: | |
729 | /* just occupy the full device; unit: sectors */ | |
730 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
731 | bdev->md.md_offset = 0; | |
732 | bdev->md.al_offset = MD_AL_OFFSET; | |
733 | bdev->md.bm_offset = MD_BM_OFFSET; | |
734 | break; | |
735 | case DRBD_MD_INDEX_INTERNAL: | |
736 | case DRBD_MD_INDEX_FLEX_INT: | |
737 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
738 | /* al size is still fixed */ | |
7ad651b5 | 739 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
740 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
741 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
742 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
743 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
744 | md_size_sect = ALIGN(md_size_sect, 8); | |
745 | ||
746 | /* plus the "drbd meta data super block", | |
747 | * and the activity log; */ | |
748 | md_size_sect += MD_BM_OFFSET; | |
749 | ||
750 | bdev->md.md_size_sect = md_size_sect; | |
751 | /* bitmap offset is adjusted by 'super' block size */ | |
752 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
753 | break; | |
754 | } | |
daeda1cc | 755 | rcu_read_unlock(); |
b411b363 PR |
756 | } |
757 | ||
4b0715f0 | 758 | /* input size is expected to be in KB */ |
b411b363 PR |
759 | char *ppsize(char *buf, unsigned long long size) |
760 | { | |
4b0715f0 LE |
761 | /* Needs 9 bytes at max including trailing NUL: |
762 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
763 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
764 | int base = 0; | |
4b0715f0 | 765 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
766 | /* shift + round */ |
767 | size = (size >> 10) + !!(size & (1<<9)); | |
768 | base++; | |
769 | } | |
4b0715f0 | 770 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
771 | |
772 | return buf; | |
773 | } | |
774 | ||
775 | /* there is still a theoretical deadlock when called from receiver | |
776 | * on an D_INCONSISTENT R_PRIMARY: | |
777 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
778 | * packet from remote to dec_ap_bio again. | |
779 | * receiver receive_sizes(), comes here, | |
780 | * waits for ap_bio_cnt == 0. -> deadlock. | |
781 | * but this cannot happen, actually, because: | |
782 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
783 | * (not connected, or bad/no disk on peer): | |
784 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
785 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
786 | * peer may not initiate a resize. | |
787 | */ | |
3b98c0c2 LE |
788 | /* Note these are not to be confused with |
789 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
790 | * which are (sub) state changes triggered by admin (drbdsetup), | |
791 | * and can be long lived. | |
792 | * This changes an mdev->flag, is triggered by drbd internals, | |
793 | * and should be short-lived. */ | |
b411b363 PR |
794 | void drbd_suspend_io(struct drbd_conf *mdev) |
795 | { | |
796 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 797 | if (drbd_suspended(mdev)) |
265be2d0 | 798 | return; |
b411b363 PR |
799 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
800 | } | |
801 | ||
802 | void drbd_resume_io(struct drbd_conf *mdev) | |
803 | { | |
804 | clear_bit(SUSPEND_IO, &mdev->flags); | |
805 | wake_up(&mdev->misc_wait); | |
806 | } | |
807 | ||
808 | /** | |
809 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
810 | * @mdev: DRBD device. | |
811 | * | |
812 | * Returns 0 on success, negative return values indicate errors. | |
813 | * You should call drbd_md_sync() after calling this function. | |
814 | */ | |
24c4830c | 815 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
816 | { |
817 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
ef5e44a6 | 818 | sector_t la_size, u_size; |
b411b363 PR |
819 | sector_t size; |
820 | char ppb[10]; | |
821 | ||
822 | int md_moved, la_size_changed; | |
823 | enum determine_dev_size rv = unchanged; | |
824 | ||
825 | /* race: | |
826 | * application request passes inc_ap_bio, | |
827 | * but then cannot get an AL-reference. | |
828 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
829 | * | |
830 | * to avoid that: | |
831 | * Suspend IO right here. | |
832 | * still lock the act_log to not trigger ASSERTs there. | |
833 | */ | |
834 | drbd_suspend_io(mdev); | |
835 | ||
836 | /* no wait necessary anymore, actually we could assert that */ | |
837 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
838 | ||
839 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
840 | prev_size = mdev->ldev->md.md_size_sect; | |
841 | la_size = mdev->ldev->md.la_size_sect; | |
842 | ||
843 | /* TODO: should only be some assert here, not (re)init... */ | |
844 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
845 | ||
daeda1cc PR |
846 | rcu_read_lock(); |
847 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
848 | rcu_read_unlock(); | |
ef5e44a6 | 849 | size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED); |
b411b363 PR |
850 | |
851 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
852 | drbd_bm_capacity(mdev) != size) { | |
853 | int err; | |
02d9a94b | 854 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
855 | if (unlikely(err)) { |
856 | /* currently there is only one error: ENOMEM! */ | |
857 | size = drbd_bm_capacity(mdev)>>1; | |
858 | if (size == 0) { | |
859 | dev_err(DEV, "OUT OF MEMORY! " | |
860 | "Could not allocate bitmap!\n"); | |
861 | } else { | |
862 | dev_err(DEV, "BM resizing failed. " | |
863 | "Leaving size unchanged at size = %lu KB\n", | |
864 | (unsigned long)size); | |
865 | } | |
866 | rv = dev_size_error; | |
867 | } | |
868 | /* racy, see comments above. */ | |
869 | drbd_set_my_capacity(mdev, size); | |
870 | mdev->ldev->md.la_size_sect = size; | |
871 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
872 | (unsigned long long)size>>1); | |
873 | } | |
874 | if (rv == dev_size_error) | |
875 | goto out; | |
876 | ||
877 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
878 | ||
879 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
880 | || prev_size != mdev->ldev->md.md_size_sect; | |
881 | ||
882 | if (la_size_changed || md_moved) { | |
24dccabb AG |
883 | int err; |
884 | ||
b411b363 PR |
885 | drbd_al_shrink(mdev); /* All extents inactive. */ |
886 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
887 | la_size_changed && md_moved ? "size changed and md moved" : | |
888 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
889 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
890 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
891 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
892 | if (err) { |
893 | rv = dev_size_error; | |
894 | goto out; | |
895 | } | |
b411b363 PR |
896 | drbd_md_mark_dirty(mdev); |
897 | } | |
898 | ||
899 | if (size > la_size) | |
900 | rv = grew; | |
901 | if (size < la_size) | |
902 | rv = shrunk; | |
903 | out: | |
904 | lc_unlock(mdev->act_log); | |
905 | wake_up(&mdev->al_wait); | |
906 | drbd_resume_io(mdev); | |
907 | ||
908 | return rv; | |
909 | } | |
910 | ||
911 | sector_t | |
ef5e44a6 PR |
912 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, |
913 | sector_t u_size, int assume_peer_has_space) | |
b411b363 PR |
914 | { |
915 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
916 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
917 | sector_t m_size; /* my size */ | |
b411b363 PR |
918 | sector_t size = 0; |
919 | ||
920 | m_size = drbd_get_max_capacity(bdev); | |
921 | ||
a393db6f PR |
922 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
923 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
924 | p_size = m_size; | |
925 | } | |
926 | ||
b411b363 PR |
927 | if (p_size && m_size) { |
928 | size = min_t(sector_t, p_size, m_size); | |
929 | } else { | |
930 | if (la_size) { | |
931 | size = la_size; | |
932 | if (m_size && m_size < size) | |
933 | size = m_size; | |
934 | if (p_size && p_size < size) | |
935 | size = p_size; | |
936 | } else { | |
937 | if (m_size) | |
938 | size = m_size; | |
939 | if (p_size) | |
940 | size = p_size; | |
941 | } | |
942 | } | |
943 | ||
944 | if (size == 0) | |
945 | dev_err(DEV, "Both nodes diskless!\n"); | |
946 | ||
947 | if (u_size) { | |
948 | if (u_size > size) | |
949 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
950 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
951 | else | |
952 | size = u_size; | |
953 | } | |
954 | ||
955 | return size; | |
956 | } | |
957 | ||
958 | /** | |
959 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
960 | * @mdev: DRBD device. | |
961 | * | |
962 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
963 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
964 | * this function. | |
965 | */ | |
f399002e | 966 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
967 | { |
968 | struct lru_cache *n, *t; | |
969 | struct lc_element *e; | |
970 | unsigned int in_use; | |
971 | int i; | |
972 | ||
b411b363 | 973 | if (mdev->act_log && |
f399002e | 974 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
975 | return 0; |
976 | ||
977 | in_use = 0; | |
978 | t = mdev->act_log; | |
7ad651b5 | 979 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 980 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
981 | |
982 | if (n == NULL) { | |
983 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
984 | return -ENOMEM; | |
985 | } | |
986 | spin_lock_irq(&mdev->al_lock); | |
987 | if (t) { | |
988 | for (i = 0; i < t->nr_elements; i++) { | |
989 | e = lc_element_by_index(t, i); | |
990 | if (e->refcnt) | |
991 | dev_err(DEV, "refcnt(%d)==%d\n", | |
992 | e->lc_number, e->refcnt); | |
993 | in_use += e->refcnt; | |
994 | } | |
995 | } | |
996 | if (!in_use) | |
997 | mdev->act_log = n; | |
998 | spin_unlock_irq(&mdev->al_lock); | |
999 | if (in_use) { | |
1000 | dev_err(DEV, "Activity log still in use!\n"); | |
1001 | lc_destroy(n); | |
1002 | return -EBUSY; | |
1003 | } else { | |
1004 | if (t) | |
1005 | lc_destroy(t); | |
1006 | } | |
1007 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
1008 | return 0; | |
1009 | } | |
1010 | ||
99432fcc | 1011 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
1012 | { |
1013 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
1014 | int max_hw_sectors = max_bio_size >> 9; |
1015 | int max_segments = 0; | |
1016 | ||
1017 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
1018 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
1019 | ||
1020 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc PR |
1021 | rcu_read_lock(); |
1022 | max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs; | |
1023 | rcu_read_unlock(); | |
99432fcc PR |
1024 | put_ldev(mdev); |
1025 | } | |
b411b363 | 1026 | |
b411b363 | 1027 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
1028 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1029 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1030 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
1031 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 1032 | |
99432fcc PR |
1033 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1034 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
1035 | ||
1036 | blk_queue_stack_limits(q, b); | |
1037 | ||
1038 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
1039 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
1040 | q->backing_dev_info.ra_pages, | |
1041 | b->backing_dev_info.ra_pages); | |
1042 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
1043 | } | |
1044 | put_ldev(mdev); | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
1049 | { | |
1050 | int now, new, local, peer; | |
1051 | ||
1052 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
1053 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1054 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1055 | |
99432fcc PR |
1056 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1057 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
1058 | mdev->local_max_bio_size = local; | |
1059 | put_ldev(mdev); | |
b411b363 | 1060 | } |
99432fcc PR |
1061 | |
1062 | /* We may ignore peer limits if the peer is modern enough. | |
1063 | Because new from 8.3.8 onwards the peer can use multiple | |
1064 | BIOs for a single peer_request */ | |
1065 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1066 | if (mdev->tconn->agreed_pro_version < 94) |
2ffca4f3 PR |
1067 | peer = min_t(int, mdev->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET); |
1068 | /* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */ | |
31890f4a | 1069 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc | 1070 | peer = DRBD_MAX_SIZE_H80_PACKET; |
2ffca4f3 PR |
1071 | else if (mdev->tconn->agreed_pro_version < 100) |
1072 | peer = DRBD_MAX_BIO_SIZE_P95; /* drbd 8.3.8 onwards, before 8.4.0 */ | |
1073 | else | |
99432fcc PR |
1074 | peer = DRBD_MAX_BIO_SIZE; |
1075 | } | |
1076 | ||
1077 | new = min_t(int, local, peer); | |
1078 | ||
1079 | if (mdev->state.role == R_PRIMARY && new < now) | |
1080 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1081 | ||
1082 | if (new != now) | |
1083 | dev_info(DEV, "max BIO size = %u\n", new); | |
1084 | ||
1085 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1086 | } |
1087 | ||
a18e9d1e | 1088 | /* Starts the worker thread */ |
0e29d163 | 1089 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1090 | { |
0e29d163 PR |
1091 | drbd_thread_start(&tconn->worker); |
1092 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1093 | } |
1094 | ||
a18e9d1e | 1095 | /* if still unconfigured, stops worker again. */ |
0e29d163 | 1096 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1097 | { |
992d6e91 | 1098 | bool stop_threads; |
0e29d163 | 1099 | spin_lock_irq(&tconn->req_lock); |
e0e16653 PR |
1100 | stop_threads = conn_all_vols_unconf(tconn) && |
1101 | tconn->cstate == C_STANDALONE; | |
0e29d163 | 1102 | spin_unlock_irq(&tconn->req_lock); |
992d6e91 LE |
1103 | if (stop_threads) { |
1104 | /* asender is implicitly stopped by receiver | |
81fa2e67 | 1105 | * in conn_disconnect() */ |
992d6e91 LE |
1106 | drbd_thread_stop(&tconn->receiver); |
1107 | drbd_thread_stop(&tconn->worker); | |
1108 | } | |
b411b363 PR |
1109 | } |
1110 | ||
0778286a PR |
1111 | /* Make sure IO is suspended before calling this function(). */ |
1112 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1113 | { | |
1114 | int s = 0; | |
1115 | ||
61610420 | 1116 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1117 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1118 | return; | |
1119 | } | |
1120 | ||
61610420 | 1121 | drbd_al_shrink(mdev); |
87eeee41 | 1122 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1123 | if (mdev->state.conn < C_CONNECTED) |
1124 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1125 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1126 | lc_unlock(mdev->act_log); |
0778286a PR |
1127 | |
1128 | if (s) | |
1129 | dev_info(DEV, "Suspended AL updates\n"); | |
1130 | } | |
1131 | ||
5979e361 LE |
1132 | |
1133 | static bool should_set_defaults(struct genl_info *info) | |
1134 | { | |
1135 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1136 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1137 | } | |
1138 | ||
d589a21e PR |
1139 | static void enforce_disk_conf_limits(struct disk_conf *dc) |
1140 | { | |
1141 | if (dc->al_extents < DRBD_AL_EXTENTS_MIN) | |
1142 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
1143 | if (dc->al_extents > DRBD_AL_EXTENTS_MAX) | |
1144 | dc->al_extents = DRBD_AL_EXTENTS_MAX; | |
1145 | ||
1146 | if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1147 | dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
1148 | } | |
1149 | ||
f399002e LE |
1150 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1151 | { | |
1152 | enum drbd_ret_code retcode; | |
1153 | struct drbd_conf *mdev; | |
daeda1cc | 1154 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1155 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1156 | int err, fifo_size; |
f399002e LE |
1157 | |
1158 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1159 | if (!adm_ctx.reply_skb) | |
1160 | return retcode; | |
1161 | if (retcode != NO_ERROR) | |
1162 | goto out; | |
1163 | ||
1164 | mdev = adm_ctx.mdev; | |
1165 | ||
1166 | /* we also need a disk | |
1167 | * to change the options on */ | |
1168 | if (!get_ldev(mdev)) { | |
1169 | retcode = ERR_NO_DISK; | |
1170 | goto out; | |
1171 | } | |
1172 | ||
daeda1cc | 1173 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1174 | if (!new_disk_conf) { |
f399002e LE |
1175 | retcode = ERR_NOMEM; |
1176 | goto fail; | |
1177 | } | |
1178 | ||
daeda1cc PR |
1179 | mutex_lock(&mdev->tconn->conf_update); |
1180 | old_disk_conf = mdev->ldev->disk_conf; | |
1181 | *new_disk_conf = *old_disk_conf; | |
5979e361 | 1182 | if (should_set_defaults(info)) |
b966b5dd | 1183 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1184 | |
5ecc72c3 | 1185 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1186 | if (err && err != -ENOMSG) { |
f399002e LE |
1187 | retcode = ERR_MANDATORY_TAG; |
1188 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1189 | } | |
1190 | ||
5ecc72c3 LE |
1191 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1192 | new_disk_conf->resync_rate = 1; | |
f399002e | 1193 | |
d589a21e | 1194 | enforce_disk_conf_limits(new_disk_conf); |
f399002e | 1195 | |
5ecc72c3 | 1196 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
9958c857 | 1197 | if (fifo_size != mdev->rs_plan_s->size) { |
813472ce PR |
1198 | new_plan = fifo_alloc(fifo_size); |
1199 | if (!new_plan) { | |
f399002e LE |
1200 | dev_err(DEV, "kmalloc of fifo_buffer failed"); |
1201 | retcode = ERR_NOMEM; | |
daeda1cc | 1202 | goto fail_unlock; |
f399002e LE |
1203 | } |
1204 | } | |
1205 | ||
f399002e LE |
1206 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); |
1207 | drbd_al_shrink(mdev); | |
5ecc72c3 | 1208 | err = drbd_check_al_size(mdev, new_disk_conf); |
f399002e LE |
1209 | lc_unlock(mdev->act_log); |
1210 | wake_up(&mdev->al_wait); | |
1211 | ||
1212 | if (err) { | |
1213 | retcode = ERR_NOMEM; | |
daeda1cc | 1214 | goto fail_unlock; |
f399002e LE |
1215 | } |
1216 | ||
dc97b708 | 1217 | write_lock_irq(&global_state_lock); |
95f8efd0 | 1218 | retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after); |
dc97b708 | 1219 | if (retcode == NO_ERROR) { |
daeda1cc | 1220 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); |
95f8efd0 | 1221 | drbd_resync_after_changed(mdev); |
dc97b708 PR |
1222 | } |
1223 | write_unlock_irq(&global_state_lock); | |
f399002e | 1224 | |
daeda1cc PR |
1225 | if (retcode != NO_ERROR) |
1226 | goto fail_unlock; | |
f399002e | 1227 | |
813472ce PR |
1228 | if (new_plan) { |
1229 | old_plan = mdev->rs_plan_s; | |
1230 | rcu_assign_pointer(mdev->rs_plan_s, new_plan); | |
9958c857 | 1231 | } |
9958c857 | 1232 | |
c141ebda | 1233 | mutex_unlock(&mdev->tconn->conf_update); |
27eb13e9 | 1234 | |
9a51ab1c PR |
1235 | if (new_disk_conf->al_updates) |
1236 | mdev->ldev->md.flags &= MDF_AL_DISABLED; | |
1237 | else | |
1238 | mdev->ldev->md.flags |= MDF_AL_DISABLED; | |
1239 | ||
27eb13e9 PR |
1240 | drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush); |
1241 | ||
daeda1cc | 1242 | drbd_md_sync(mdev); |
f399002e LE |
1243 | |
1244 | if (mdev->state.conn >= C_CONNECTED) | |
1245 | drbd_send_sync_param(mdev); | |
1246 | ||
daeda1cc PR |
1247 | synchronize_rcu(); |
1248 | kfree(old_disk_conf); | |
813472ce | 1249 | kfree(old_plan); |
cdfda633 | 1250 | mod_timer(&mdev->request_timer, jiffies + HZ); |
daeda1cc PR |
1251 | goto success; |
1252 | ||
1253 | fail_unlock: | |
1254 | mutex_unlock(&mdev->tconn->conf_update); | |
f399002e | 1255 | fail: |
5ecc72c3 | 1256 | kfree(new_disk_conf); |
813472ce | 1257 | kfree(new_plan); |
daeda1cc PR |
1258 | success: |
1259 | put_ldev(mdev); | |
f399002e LE |
1260 | out: |
1261 | drbd_adm_finish(info, retcode); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
3b98c0c2 | 1265 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1266 | { |
3b98c0c2 LE |
1267 | struct drbd_conf *mdev; |
1268 | int err; | |
116676ca | 1269 | enum drbd_ret_code retcode; |
b411b363 PR |
1270 | enum determine_dev_size dd; |
1271 | sector_t max_possible_sectors; | |
1272 | sector_t min_md_device_sectors; | |
1273 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1274 | struct disk_conf *new_disk_conf = NULL; |
e525fd89 | 1275 | struct block_device *bdev; |
b411b363 | 1276 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1277 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1278 | union drbd_state ns, os; |
f2024e7c | 1279 | enum drbd_state_rv rv; |
44ed167d | 1280 | struct net_conf *nc; |
b411b363 | 1281 | |
3b98c0c2 LE |
1282 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1283 | if (!adm_ctx.reply_skb) | |
1284 | return retcode; | |
1285 | if (retcode != NO_ERROR) | |
40cbf085 | 1286 | goto finish; |
3b98c0c2 LE |
1287 | |
1288 | mdev = adm_ctx.mdev; | |
0e29d163 | 1289 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1290 | |
1291 | /* if you want to reconfigure, please tear down first */ | |
1292 | if (mdev->state.disk > D_DISKLESS) { | |
1293 | retcode = ERR_DISK_CONFIGURED; | |
1294 | goto fail; | |
1295 | } | |
82f59cc6 LE |
1296 | /* It may just now have detached because of IO error. Make sure |
1297 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1298 | * e.g. if someone calls attach from the on-io-error handler, | |
1299 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1300 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1301 | |
3b98c0c2 | 1302 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1303 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1304 | if (!nbc) { | |
1305 | retcode = ERR_NOMEM; | |
1306 | goto fail; | |
1307 | } | |
daeda1cc PR |
1308 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1309 | if (!new_disk_conf) { | |
1310 | retcode = ERR_NOMEM; | |
1311 | goto fail; | |
1312 | } | |
1313 | nbc->disk_conf = new_disk_conf; | |
b411b363 | 1314 | |
daeda1cc PR |
1315 | set_disk_conf_defaults(new_disk_conf); |
1316 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1317 | if (err) { |
b411b363 | 1318 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1319 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1320 | goto fail; |
1321 | } | |
1322 | ||
d589a21e PR |
1323 | enforce_disk_conf_limits(new_disk_conf); |
1324 | ||
9958c857 PR |
1325 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1326 | if (!new_plan) { | |
1327 | retcode = ERR_NOMEM; | |
1328 | goto fail; | |
1329 | } | |
1330 | ||
daeda1cc | 1331 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1332 | retcode = ERR_MD_IDX_INVALID; |
1333 | goto fail; | |
1334 | } | |
1335 | ||
44ed167d PR |
1336 | rcu_read_lock(); |
1337 | nc = rcu_dereference(mdev->tconn->net_conf); | |
1338 | if (nc) { | |
daeda1cc | 1339 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1340 | rcu_read_unlock(); |
47ff2d0a PR |
1341 | retcode = ERR_STONITH_AND_PROT_A; |
1342 | goto fail; | |
1343 | } | |
1344 | } | |
44ed167d | 1345 | rcu_read_unlock(); |
47ff2d0a | 1346 | |
daeda1cc | 1347 | bdev = blkdev_get_by_path(new_disk_conf->backing_dev, |
d4d77629 | 1348 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); |
e525fd89 | 1349 | if (IS_ERR(bdev)) { |
daeda1cc | 1350 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev, |
e525fd89 | 1351 | PTR_ERR(bdev)); |
b411b363 PR |
1352 | retcode = ERR_OPEN_DISK; |
1353 | goto fail; | |
1354 | } | |
e525fd89 TH |
1355 | nbc->backing_bdev = bdev; |
1356 | ||
1357 | /* | |
1358 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1359 | * drbd sharing one meta device. TODO in that case, paranoia | |
1360 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1361 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1362 | * should check it for you already; but if you don't, or | |
1363 | * someone fooled it, we need to double check here) | |
1364 | */ | |
daeda1cc | 1365 | bdev = blkdev_get_by_path(new_disk_conf->meta_dev, |
d4d77629 | 1366 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, |
daeda1cc | 1367 | (new_disk_conf->meta_dev_idx < 0) ? |
d4d77629 | 1368 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1369 | if (IS_ERR(bdev)) { |
daeda1cc | 1370 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev, |
e525fd89 | 1371 | PTR_ERR(bdev)); |
b411b363 PR |
1372 | retcode = ERR_OPEN_MD_DISK; |
1373 | goto fail; | |
1374 | } | |
e525fd89 | 1375 | nbc->md_bdev = bdev; |
b411b363 | 1376 | |
e525fd89 | 1377 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1378 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1379 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1380 | retcode = ERR_MD_IDX_INVALID; |
b411b363 PR |
1381 | goto fail; |
1382 | } | |
1383 | ||
1384 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1385 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1386 | offsetof(struct bm_extent, lce)); |
1387 | if (!resync_lru) { | |
1388 | retcode = ERR_NOMEM; | |
e525fd89 | 1389 | goto fail; |
b411b363 PR |
1390 | } |
1391 | ||
1392 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1393 | drbd_md_set_sector_offsets(mdev, nbc); | |
1394 | ||
daeda1cc | 1395 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
b411b363 PR |
1396 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", |
1397 | (unsigned long long) drbd_get_max_capacity(nbc), | |
daeda1cc | 1398 | (unsigned long long) new_disk_conf->disk_size); |
67b58bf7 | 1399 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1400 | goto fail; |
b411b363 PR |
1401 | } |
1402 | ||
daeda1cc | 1403 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1404 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1405 | /* at least one MB, otherwise it does not make sense */ | |
1406 | min_md_device_sectors = (2<<10); | |
1407 | } else { | |
1408 | max_possible_sectors = DRBD_MAX_SECTORS; | |
daeda1cc | 1409 | min_md_device_sectors = MD_RESERVED_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1410 | } |
1411 | ||
b411b363 | 1412 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
67b58bf7 | 1413 | retcode = ERR_MD_DISK_TOO_SMALL; |
b411b363 PR |
1414 | dev_warn(DEV, "refusing attach: md-device too small, " |
1415 | "at least %llu sectors needed for this meta-disk type\n", | |
1416 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1417 | goto fail; |
b411b363 PR |
1418 | } |
1419 | ||
1420 | /* Make sure the new disk is big enough | |
1421 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1422 | if (drbd_get_max_capacity(nbc) < | |
1423 | drbd_get_capacity(mdev->this_bdev)) { | |
67b58bf7 | 1424 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1425 | goto fail; |
b411b363 PR |
1426 | } |
1427 | ||
1428 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1429 | ||
1352994b LE |
1430 | if (nbc->known_size > max_possible_sectors) { |
1431 | dev_warn(DEV, "==> truncating very big lower level device " | |
1432 | "to currently maximum possible %llu sectors <==\n", | |
1433 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1434 | if (new_disk_conf->meta_dev_idx >= 0) |
1352994b LE |
1435 | dev_warn(DEV, "==>> using internal or flexible " |
1436 | "meta data may help <<==\n"); | |
1437 | } | |
1438 | ||
b411b363 PR |
1439 | drbd_suspend_io(mdev); |
1440 | /* also wait for the last barrier ack. */ | |
b6dd1a89 LE |
1441 | /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171 |
1442 | * We need a way to either ignore barrier acks for barriers sent before a device | |
1443 | * was attached, or a way to wait for all pending barrier acks to come in. | |
1444 | * As barriers are counted per resource, | |
1445 | * we'd need to suspend io on all devices of a resource. | |
1446 | */ | |
2aebfabb | 1447 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 | 1448 | /* and for any other previously queued work */ |
a21e9298 | 1449 | drbd_flush_workqueue(mdev); |
b411b363 | 1450 | |
f2024e7c AG |
1451 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1452 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1453 | drbd_resume_io(mdev); |
f2024e7c | 1454 | if (rv < SS_SUCCESS) |
e525fd89 | 1455 | goto fail; |
b411b363 PR |
1456 | |
1457 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1458 | goto force_diskless; | |
1459 | ||
1460 | drbd_md_set_sector_offsets(mdev, nbc); | |
1461 | ||
1462 | if (!mdev->bitmap) { | |
1463 | if (drbd_bm_init(mdev)) { | |
1464 | retcode = ERR_NOMEM; | |
1465 | goto force_diskless_dec; | |
1466 | } | |
1467 | } | |
1468 | ||
1469 | retcode = drbd_md_read(mdev, nbc); | |
1470 | if (retcode != NO_ERROR) | |
1471 | goto force_diskless_dec; | |
1472 | ||
1473 | if (mdev->state.conn < C_CONNECTED && | |
1474 | mdev->state.role == R_PRIMARY && | |
1475 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1476 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1477 | (unsigned long long)mdev->ed_uuid); | |
1478 | retcode = ERR_DATA_NOT_CURRENT; | |
1479 | goto force_diskless_dec; | |
1480 | } | |
1481 | ||
1482 | /* Since we are diskless, fix the activity log first... */ | |
daeda1cc | 1483 | if (drbd_check_al_size(mdev, new_disk_conf)) { |
b411b363 PR |
1484 | retcode = ERR_NOMEM; |
1485 | goto force_diskless_dec; | |
1486 | } | |
1487 | ||
1488 | /* Prevent shrinking of consistent devices ! */ | |
1489 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
daeda1cc | 1490 | drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) { |
b411b363 | 1491 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
67b58bf7 | 1492 | retcode = ERR_DISK_TOO_SMALL; |
b411b363 PR |
1493 | goto force_diskless_dec; |
1494 | } | |
1495 | ||
b411b363 PR |
1496 | /* Reset the "barriers don't work" bits here, then force meta data to |
1497 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 1498 | if (new_disk_conf->md_flushes) |
a8a4e51e | 1499 | clear_bit(MD_NO_FUA, &mdev->flags); |
e544046a AG |
1500 | else |
1501 | set_bit(MD_NO_FUA, &mdev->flags); | |
b411b363 PR |
1502 | |
1503 | /* Point of no return reached. | |
1504 | * Devices and memory are no longer released by error cleanup below. | |
1505 | * now mdev takes over responsibility, and the state engine should | |
1506 | * clean it up somewhere. */ | |
1507 | D_ASSERT(mdev->ldev == NULL); | |
1508 | mdev->ldev = nbc; | |
1509 | mdev->resync = resync_lru; | |
9958c857 | 1510 | mdev->rs_plan_s = new_plan; |
b411b363 PR |
1511 | nbc = NULL; |
1512 | resync_lru = NULL; | |
daeda1cc | 1513 | new_disk_conf = NULL; |
9958c857 | 1514 | new_plan = NULL; |
b411b363 | 1515 | |
4b0007c0 | 1516 | drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush); |
b411b363 PR |
1517 | |
1518 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1519 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1520 | else | |
1521 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1522 | ||
894c6a94 | 1523 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
d5d7ebd4 | 1524 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) |
b411b363 | 1525 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
b411b363 PR |
1526 | |
1527 | mdev->send_cnt = 0; | |
1528 | mdev->recv_cnt = 0; | |
1529 | mdev->read_cnt = 0; | |
1530 | mdev->writ_cnt = 0; | |
1531 | ||
99432fcc | 1532 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1533 | |
1534 | /* If I am currently not R_PRIMARY, | |
1535 | * but meta data primary indicator is set, | |
1536 | * I just now recover from a hard crash, | |
1537 | * and have been R_PRIMARY before that crash. | |
1538 | * | |
1539 | * Now, if I had no connection before that crash | |
1540 | * (have been degraded R_PRIMARY), chances are that | |
1541 | * I won't find my peer now either. | |
1542 | * | |
1543 | * In that case, and _only_ in that case, | |
1544 | * we use the degr-wfc-timeout instead of the default, | |
1545 | * so we can automatically recover from a crash of a | |
1546 | * degraded but active "cluster" after a certain timeout. | |
1547 | */ | |
1548 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1549 | if (mdev->state.role != R_PRIMARY && | |
1550 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1551 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1552 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1553 | ||
24c4830c | 1554 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1555 | if (dd == dev_size_error) { |
1556 | retcode = ERR_NOMEM_BITMAP; | |
1557 | goto force_diskless_dec; | |
1558 | } else if (dd == grew) | |
1559 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1560 | ||
9a51ab1c PR |
1561 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC) || |
1562 | (test_bit(CRASHED_PRIMARY, &mdev->flags) && | |
1563 | drbd_md_test_flag(mdev->ldev, MDF_AL_DISABLED))) { | |
b411b363 PR |
1564 | dev_info(DEV, "Assuming that all blocks are out of sync " |
1565 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1566 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1567 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1568 | retcode = ERR_IO_MD_DISK; |
1569 | goto force_diskless_dec; | |
1570 | } | |
1571 | } else { | |
20ceb2b2 | 1572 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1573 | "read from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1574 | retcode = ERR_IO_MD_DISK; |
1575 | goto force_diskless_dec; | |
1576 | } | |
1577 | } | |
1578 | ||
0778286a PR |
1579 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1580 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1581 | ||
87eeee41 | 1582 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1583 | os = drbd_read_state(mdev); |
1584 | ns = os; | |
b411b363 PR |
1585 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1586 | otherwise investigate MDF_WasUpToDate... | |
1587 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1588 | otherwise into D_CONSISTENT state. | |
1589 | */ | |
1590 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1591 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1592 | ns.disk = D_CONSISTENT; | |
1593 | else | |
1594 | ns.disk = D_OUTDATED; | |
1595 | } else { | |
1596 | ns.disk = D_INCONSISTENT; | |
1597 | } | |
1598 | ||
1599 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1600 | ns.pdsk = D_OUTDATED; | |
1601 | ||
daeda1cc PR |
1602 | rcu_read_lock(); |
1603 | if (ns.disk == D_CONSISTENT && | |
1604 | (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE)) | |
b411b363 PR |
1605 | ns.disk = D_UP_TO_DATE; |
1606 | ||
1607 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1608 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1609 | this point, because drbd_request_state() modifies these | |
1610 | flags. */ | |
1611 | ||
9a51ab1c PR |
1612 | if (rcu_dereference(mdev->ldev->disk_conf)->al_updates) |
1613 | mdev->ldev->md.flags &= MDF_AL_DISABLED; | |
1614 | else | |
1615 | mdev->ldev->md.flags |= MDF_AL_DISABLED; | |
1616 | ||
1617 | rcu_read_unlock(); | |
1618 | ||
b411b363 PR |
1619 | /* In case we are C_CONNECTED postpone any decision on the new disk |
1620 | state after the negotiation phase. */ | |
1621 | if (mdev->state.conn == C_CONNECTED) { | |
1622 | mdev->new_state_tmp.i = ns.i; | |
1623 | ns.i = os.i; | |
1624 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1625 | |
1626 | /* We expect to receive up-to-date UUIDs soon. | |
1627 | To avoid a race in receive_state, free p_uuid while | |
1628 | holding req_lock. I.e. atomic with the state change */ | |
1629 | kfree(mdev->p_uuid); | |
1630 | mdev->p_uuid = NULL; | |
b411b363 PR |
1631 | } |
1632 | ||
1633 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1634 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1635 | |
1636 | if (rv < SS_SUCCESS) | |
1637 | goto force_diskless_dec; | |
1638 | ||
cdfda633 PR |
1639 | mod_timer(&mdev->request_timer, jiffies + HZ); |
1640 | ||
b411b363 PR |
1641 | if (mdev->state.role == R_PRIMARY) |
1642 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1643 | else | |
1644 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1645 | ||
1646 | drbd_md_mark_dirty(mdev); | |
1647 | drbd_md_sync(mdev); | |
1648 | ||
1649 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1650 | put_ldev(mdev); | |
0e29d163 | 1651 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1652 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1653 | return 0; |
1654 | ||
1655 | force_diskless_dec: | |
1656 | put_ldev(mdev); | |
1657 | force_diskless: | |
9510b241 | 1658 | drbd_force_state(mdev, NS(disk, D_DISKLESS)); |
b411b363 | 1659 | drbd_md_sync(mdev); |
b411b363 | 1660 | fail: |
40cbf085 | 1661 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1662 | if (nbc) { |
e525fd89 TH |
1663 | if (nbc->backing_bdev) |
1664 | blkdev_put(nbc->backing_bdev, | |
1665 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1666 | if (nbc->md_bdev) | |
1667 | blkdev_put(nbc->md_bdev, | |
1668 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1669 | kfree(nbc); |
1670 | } | |
daeda1cc | 1671 | kfree(new_disk_conf); |
b411b363 | 1672 | lc_destroy(resync_lru); |
9958c857 | 1673 | kfree(new_plan); |
b411b363 | 1674 | |
40cbf085 | 1675 | finish: |
3b98c0c2 | 1676 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1677 | return 0; |
1678 | } | |
1679 | ||
cdfda633 | 1680 | static int adm_detach(struct drbd_conf *mdev, int force) |
85f75dd7 | 1681 | { |
19f83c76 | 1682 | enum drbd_state_rv retcode; |
009ba89d | 1683 | int ret; |
cdfda633 PR |
1684 | |
1685 | if (force) { | |
1686 | drbd_force_state(mdev, NS(disk, D_FAILED)); | |
1687 | retcode = SS_SUCCESS; | |
1688 | goto out; | |
1689 | } | |
1690 | ||
85f75dd7 | 1691 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
0cfac5dd | 1692 | drbd_md_get_buffer(mdev); /* make sure there is no in-flight meta-data IO */ |
009ba89d | 1693 | retcode = drbd_request_state(mdev, NS(disk, D_FAILED)); |
0cfac5dd | 1694 | drbd_md_put_buffer(mdev); |
009ba89d LE |
1695 | /* D_FAILED will transition to DISKLESS. */ |
1696 | ret = wait_event_interruptible(mdev->misc_wait, | |
1697 | mdev->state.disk != D_FAILED); | |
85f75dd7 | 1698 | drbd_resume_io(mdev); |
009ba89d LE |
1699 | if ((int)retcode == (int)SS_IS_DISKLESS) |
1700 | retcode = SS_NOTHING_TO_DO; | |
1701 | if (ret) | |
1702 | retcode = ERR_INTR; | |
cdfda633 | 1703 | out: |
85f75dd7 LE |
1704 | return retcode; |
1705 | } | |
1706 | ||
82f59cc6 LE |
1707 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1708 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1709 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1710 | * internal references as well. | |
1711 | * Only then we have finally detached. */ | |
3b98c0c2 | 1712 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1713 | { |
9a0d9d03 | 1714 | enum drbd_ret_code retcode; |
cdfda633 PR |
1715 | struct detach_parms parms = { }; |
1716 | int err; | |
3b98c0c2 LE |
1717 | |
1718 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1719 | if (!adm_ctx.reply_skb) | |
1720 | return retcode; | |
1721 | if (retcode != NO_ERROR) | |
1722 | goto out; | |
1723 | ||
cdfda633 PR |
1724 | if (info->attrs[DRBD_NLA_DETACH_PARMS]) { |
1725 | err = detach_parms_from_attrs(&parms, info); | |
1726 | if (err) { | |
1727 | retcode = ERR_MANDATORY_TAG; | |
1728 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1729 | goto out; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | retcode = adm_detach(adm_ctx.mdev, parms.force_detach); | |
3b98c0c2 LE |
1734 | out: |
1735 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1736 | return 0; |
1737 | } | |
1738 | ||
f399002e LE |
1739 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1740 | { | |
1741 | struct drbd_conf *mdev; | |
695d08fa | 1742 | bool rv = false; |
f399002e LE |
1743 | int vnr; |
1744 | ||
695d08fa | 1745 | rcu_read_lock(); |
f399002e LE |
1746 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1747 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1748 | mdev->state.conn == C_SYNC_TARGET || | |
1749 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1750 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1751 | rv = true; | |
1752 | break; | |
1753 | } | |
f399002e | 1754 | } |
695d08fa PR |
1755 | rcu_read_unlock(); |
1756 | ||
1757 | return rv; | |
f399002e LE |
1758 | } |
1759 | ||
1760 | static bool conn_ov_running(struct drbd_tconn *tconn) | |
1761 | { | |
1762 | struct drbd_conf *mdev; | |
695d08fa | 1763 | bool rv = false; |
f399002e LE |
1764 | int vnr; |
1765 | ||
695d08fa | 1766 | rcu_read_lock(); |
f399002e LE |
1767 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1768 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1769 | mdev->state.conn == C_VERIFY_T) { |
1770 | rv = true; | |
1771 | break; | |
1772 | } | |
f399002e | 1773 | } |
695d08fa PR |
1774 | rcu_read_unlock(); |
1775 | ||
1776 | return rv; | |
f399002e LE |
1777 | } |
1778 | ||
cd64397c | 1779 | static enum drbd_ret_code |
44ed167d | 1780 | _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf) |
cd64397c PR |
1781 | { |
1782 | struct drbd_conf *mdev; | |
1783 | int i; | |
1784 | ||
dcb20d1a PR |
1785 | if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) { |
1786 | if (new_conf->wire_protocol != old_conf->wire_protocol) | |
1787 | return ERR_NEED_APV_100; | |
1788 | ||
1789 | if (new_conf->two_primaries != old_conf->two_primaries) | |
1790 | return ERR_NEED_APV_100; | |
1791 | ||
1792 | if (!new_conf->integrity_alg != !old_conf->integrity_alg) | |
1793 | return ERR_NEED_APV_100; | |
1794 | ||
1795 | if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg)) | |
1796 | return ERR_NEED_APV_100; | |
1797 | } | |
1798 | ||
1799 | if (!new_conf->two_primaries && | |
1800 | conn_highest_role(tconn) == R_PRIMARY && | |
1801 | conn_highest_peer(tconn) == R_PRIMARY) | |
1802 | return ERR_NEED_ALLOW_TWO_PRI; | |
b032b6fa | 1803 | |
cd64397c PR |
1804 | if (new_conf->two_primaries && |
1805 | (new_conf->wire_protocol != DRBD_PROT_C)) | |
1806 | return ERR_NOT_PROTO_C; | |
1807 | ||
cd64397c PR |
1808 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1809 | if (get_ldev(mdev)) { | |
daeda1cc | 1810 | enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing; |
cd64397c | 1811 | put_ldev(mdev); |
44ed167d | 1812 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 1813 | return ERR_STONITH_AND_PROT_A; |
cd64397c | 1814 | } |
6139f60d | 1815 | if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data) |
cd64397c | 1816 | return ERR_DISCARD; |
cd64397c | 1817 | } |
cd64397c PR |
1818 | |
1819 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) | |
1820 | return ERR_CONG_NOT_PROTO_A; | |
1821 | ||
1822 | return NO_ERROR; | |
1823 | } | |
1824 | ||
44ed167d PR |
1825 | static enum drbd_ret_code |
1826 | check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf) | |
1827 | { | |
1828 | static enum drbd_ret_code rv; | |
1829 | struct drbd_conf *mdev; | |
1830 | int i; | |
1831 | ||
1832 | rcu_read_lock(); | |
1833 | rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf); | |
1834 | rcu_read_unlock(); | |
1835 | ||
1836 | /* tconn->volumes protected by genl_lock() here */ | |
1837 | idr_for_each_entry(&tconn->volumes, mdev, i) { | |
1838 | if (!mdev->bitmap) { | |
1839 | if(drbd_bm_init(mdev)) | |
1840 | return ERR_NOMEM; | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | return rv; | |
1845 | } | |
1846 | ||
0fd0ea06 PR |
1847 | struct crypto { |
1848 | struct crypto_hash *verify_tfm; | |
1849 | struct crypto_hash *csums_tfm; | |
1850 | struct crypto_hash *cram_hmac_tfm; | |
8d412fc6 | 1851 | struct crypto_hash *integrity_tfm; |
0fd0ea06 PR |
1852 | }; |
1853 | ||
1854 | static int | |
4b6ad6d4 | 1855 | alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
1856 | { |
1857 | if (!tfm_name[0]) | |
1858 | return NO_ERROR; | |
1859 | ||
1860 | *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC); | |
1861 | if (IS_ERR(*tfm)) { | |
1862 | *tfm = NULL; | |
1863 | return err_alg; | |
1864 | } | |
1865 | ||
0fd0ea06 PR |
1866 | return NO_ERROR; |
1867 | } | |
1868 | ||
1869 | static enum drbd_ret_code | |
1870 | alloc_crypto(struct crypto *crypto, struct net_conf *new_conf) | |
1871 | { | |
1872 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
1873 | enum drbd_ret_code rv; | |
0fd0ea06 | 1874 | |
4b6ad6d4 AG |
1875 | rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg, |
1876 | ERR_CSUMS_ALG); | |
0fd0ea06 PR |
1877 | if (rv != NO_ERROR) |
1878 | return rv; | |
4b6ad6d4 AG |
1879 | rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg, |
1880 | ERR_VERIFY_ALG); | |
0fd0ea06 PR |
1881 | if (rv != NO_ERROR) |
1882 | return rv; | |
4b6ad6d4 AG |
1883 | rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg, |
1884 | ERR_INTEGRITY_ALG); | |
0fd0ea06 PR |
1885 | if (rv != NO_ERROR) |
1886 | return rv; | |
0fd0ea06 PR |
1887 | if (new_conf->cram_hmac_alg[0] != 0) { |
1888 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1889 | new_conf->cram_hmac_alg); | |
1890 | ||
4b6ad6d4 AG |
1891 | rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name, |
1892 | ERR_AUTH_ALG); | |
0fd0ea06 | 1893 | } |
0fd0ea06 PR |
1894 | |
1895 | return rv; | |
1896 | } | |
1897 | ||
1898 | static void free_crypto(struct crypto *crypto) | |
1899 | { | |
0fd0ea06 | 1900 | crypto_free_hash(crypto->cram_hmac_tfm); |
8d412fc6 | 1901 | crypto_free_hash(crypto->integrity_tfm); |
0fd0ea06 PR |
1902 | crypto_free_hash(crypto->csums_tfm); |
1903 | crypto_free_hash(crypto->verify_tfm); | |
1904 | } | |
1905 | ||
f399002e LE |
1906 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
1907 | { | |
1908 | enum drbd_ret_code retcode; | |
1909 | struct drbd_tconn *tconn; | |
44ed167d | 1910 | struct net_conf *old_conf, *new_conf = NULL; |
f399002e LE |
1911 | int err; |
1912 | int ovr; /* online verify running */ | |
1913 | int rsr; /* re-sync running */ | |
0fd0ea06 | 1914 | struct crypto crypto = { }; |
f399002e | 1915 | |
089c075d | 1916 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION); |
f399002e LE |
1917 | if (!adm_ctx.reply_skb) |
1918 | return retcode; | |
1919 | if (retcode != NO_ERROR) | |
1920 | goto out; | |
1921 | ||
1922 | tconn = adm_ctx.tconn; | |
1923 | ||
1924 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); | |
1925 | if (!new_conf) { | |
1926 | retcode = ERR_NOMEM; | |
1927 | goto out; | |
1928 | } | |
1929 | ||
44ed167d PR |
1930 | conn_reconfig_start(tconn); |
1931 | ||
88104ca4 | 1932 | mutex_lock(&tconn->data.mutex); |
a0095508 | 1933 | mutex_lock(&tconn->conf_update); |
91fd4dad | 1934 | old_conf = tconn->net_conf; |
44ed167d PR |
1935 | |
1936 | if (!old_conf) { | |
f399002e LE |
1937 | drbd_msg_put_info("net conf missing, try connect"); |
1938 | retcode = ERR_INVALID_REQUEST; | |
91fd4dad | 1939 | goto fail; |
f399002e LE |
1940 | } |
1941 | ||
44ed167d | 1942 | *new_conf = *old_conf; |
5979e361 | 1943 | if (should_set_defaults(info)) |
b966b5dd | 1944 | set_net_conf_defaults(new_conf); |
f399002e | 1945 | |
f399002e | 1946 | err = net_conf_from_attrs_for_change(new_conf, info); |
c75b9b10 | 1947 | if (err && err != -ENOMSG) { |
f399002e LE |
1948 | retcode = ERR_MANDATORY_TAG; |
1949 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1950 | goto fail; | |
1951 | } | |
1952 | ||
cd64397c PR |
1953 | retcode = check_net_options(tconn, new_conf); |
1954 | if (retcode != NO_ERROR) | |
1955 | goto fail; | |
1956 | ||
f399002e LE |
1957 | /* re-sync running */ |
1958 | rsr = conn_resync_running(tconn); | |
0fd0ea06 | 1959 | if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) { |
f399002e | 1960 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 1961 | goto fail; |
f399002e LE |
1962 | } |
1963 | ||
f399002e LE |
1964 | /* online verify running */ |
1965 | ovr = conn_ov_running(tconn); | |
0fd0ea06 PR |
1966 | if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) { |
1967 | retcode = ERR_VERIFY_RUNNING; | |
1968 | goto fail; | |
f399002e LE |
1969 | } |
1970 | ||
0fd0ea06 PR |
1971 | retcode = alloc_crypto(&crypto, new_conf); |
1972 | if (retcode != NO_ERROR) | |
1973 | goto fail; | |
f399002e | 1974 | |
44ed167d | 1975 | rcu_assign_pointer(tconn->net_conf, new_conf); |
f399002e LE |
1976 | |
1977 | if (!rsr) { | |
1978 | crypto_free_hash(tconn->csums_tfm); | |
0fd0ea06 PR |
1979 | tconn->csums_tfm = crypto.csums_tfm; |
1980 | crypto.csums_tfm = NULL; | |
f399002e LE |
1981 | } |
1982 | if (!ovr) { | |
1983 | crypto_free_hash(tconn->verify_tfm); | |
0fd0ea06 PR |
1984 | tconn->verify_tfm = crypto.verify_tfm; |
1985 | crypto.verify_tfm = NULL; | |
f399002e LE |
1986 | } |
1987 | ||
8d412fc6 AG |
1988 | crypto_free_hash(tconn->integrity_tfm); |
1989 | tconn->integrity_tfm = crypto.integrity_tfm; | |
d659f2aa | 1990 | if (tconn->cstate >= C_WF_REPORT_PARAMS && tconn->agreed_pro_version >= 100) |
88104ca4 | 1991 | /* Do this without trying to take tconn->data.mutex again. */ |
d659f2aa | 1992 | __drbd_send_protocol(tconn, P_PROTOCOL_UPDATE); |
0fd0ea06 | 1993 | |
0fd0ea06 PR |
1994 | crypto_free_hash(tconn->cram_hmac_tfm); |
1995 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
1996 | ||
a0095508 | 1997 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 1998 | mutex_unlock(&tconn->data.mutex); |
91fd4dad PR |
1999 | synchronize_rcu(); |
2000 | kfree(old_conf); | |
2001 | ||
f399002e LE |
2002 | if (tconn->cstate >= C_WF_REPORT_PARAMS) |
2003 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
2004 | ||
91fd4dad PR |
2005 | goto done; |
2006 | ||
f399002e | 2007 | fail: |
a0095508 | 2008 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 2009 | mutex_unlock(&tconn->data.mutex); |
0fd0ea06 | 2010 | free_crypto(&crypto); |
f399002e | 2011 | kfree(new_conf); |
91fd4dad | 2012 | done: |
f399002e LE |
2013 | conn_reconfig_done(tconn); |
2014 | out: | |
2015 | drbd_adm_finish(info, retcode); | |
2016 | return 0; | |
2017 | } | |
2018 | ||
3b98c0c2 | 2019 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2020 | { |
3b98c0c2 | 2021 | struct drbd_conf *mdev; |
44ed167d | 2022 | struct net_conf *old_conf, *new_conf = NULL; |
0fd0ea06 | 2023 | struct crypto crypto = { }; |
3b98c0c2 | 2024 | struct drbd_tconn *tconn; |
3b98c0c2 LE |
2025 | enum drbd_ret_code retcode; |
2026 | int i; | |
2027 | int err; | |
b411b363 | 2028 | |
44e52cfa | 2029 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
089c075d | 2030 | |
3b98c0c2 LE |
2031 | if (!adm_ctx.reply_skb) |
2032 | return retcode; | |
2033 | if (retcode != NO_ERROR) | |
2034 | goto out; | |
089c075d AG |
2035 | if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) { |
2036 | drbd_msg_put_info("connection endpoint(s) missing"); | |
2037 | retcode = ERR_INVALID_REQUEST; | |
2038 | goto out; | |
2039 | } | |
2040 | ||
2041 | /* No need for _rcu here. All reconfiguration is | |
2042 | * strictly serialized on genl_lock(). We are protected against | |
2043 | * concurrent reconfiguration/addition/deletion */ | |
2044 | list_for_each_entry(tconn, &drbd_tconns, all_tconn) { | |
2045 | if (nla_len(adm_ctx.my_addr) == tconn->my_addr_len && | |
2046 | !memcmp(nla_data(adm_ctx.my_addr), &tconn->my_addr, tconn->my_addr_len)) { | |
2047 | retcode = ERR_LOCAL_ADDR; | |
2048 | goto out; | |
2049 | } | |
2050 | ||
2051 | if (nla_len(adm_ctx.peer_addr) == tconn->peer_addr_len && | |
2052 | !memcmp(nla_data(adm_ctx.peer_addr), &tconn->peer_addr, tconn->peer_addr_len)) { | |
2053 | retcode = ERR_PEER_ADDR; | |
2054 | goto out; | |
2055 | } | |
2056 | } | |
3b98c0c2 LE |
2057 | |
2058 | tconn = adm_ctx.tconn; | |
80883197 | 2059 | conn_reconfig_start(tconn); |
b411b363 | 2060 | |
80883197 | 2061 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
2062 | retcode = ERR_NET_CONFIGURED; |
2063 | goto fail; | |
2064 | } | |
2065 | ||
a209b4ae | 2066 | /* allocation not in the IO path, drbdsetup / netlink process context */ |
5979e361 | 2067 | new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL); |
b411b363 PR |
2068 | if (!new_conf) { |
2069 | retcode = ERR_NOMEM; | |
2070 | goto fail; | |
2071 | } | |
2072 | ||
b966b5dd | 2073 | set_net_conf_defaults(new_conf); |
f399002e LE |
2074 | |
2075 | err = net_conf_from_attrs(new_conf, info); | |
25e40932 | 2076 | if (err && err != -ENOMSG) { |
b411b363 | 2077 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2078 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2079 | goto fail; |
2080 | } | |
2081 | ||
cd64397c PR |
2082 | retcode = check_net_options(tconn, new_conf); |
2083 | if (retcode != NO_ERROR) | |
422028b1 | 2084 | goto fail; |
422028b1 | 2085 | |
0fd0ea06 PR |
2086 | retcode = alloc_crypto(&crypto, new_conf); |
2087 | if (retcode != NO_ERROR) | |
2088 | goto fail; | |
b411b363 | 2089 | |
b411b363 PR |
2090 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
2091 | ||
80883197 | 2092 | conn_flush_workqueue(tconn); |
91fd4dad | 2093 | |
a0095508 | 2094 | mutex_lock(&tconn->conf_update); |
91fd4dad PR |
2095 | old_conf = tconn->net_conf; |
2096 | if (old_conf) { | |
b411b363 | 2097 | retcode = ERR_NET_CONFIGURED; |
a0095508 | 2098 | mutex_unlock(&tconn->conf_update); |
b411b363 PR |
2099 | goto fail; |
2100 | } | |
44ed167d | 2101 | rcu_assign_pointer(tconn->net_conf, new_conf); |
b411b363 | 2102 | |
91fd4dad | 2103 | conn_free_crypto(tconn); |
0fd0ea06 | 2104 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; |
8d412fc6 | 2105 | tconn->integrity_tfm = crypto.integrity_tfm; |
0fd0ea06 PR |
2106 | tconn->csums_tfm = crypto.csums_tfm; |
2107 | tconn->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2108 | |
089c075d AG |
2109 | tconn->my_addr_len = nla_len(adm_ctx.my_addr); |
2110 | memcpy(&tconn->my_addr, nla_data(adm_ctx.my_addr), tconn->my_addr_len); | |
2111 | tconn->peer_addr_len = nla_len(adm_ctx.peer_addr); | |
2112 | memcpy(&tconn->peer_addr, nla_data(adm_ctx.peer_addr), tconn->peer_addr_len); | |
2113 | ||
a0095508 | 2114 | mutex_unlock(&tconn->conf_update); |
91fd4dad | 2115 | |
695d08fa | 2116 | rcu_read_lock(); |
80883197 PR |
2117 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2118 | mdev->send_cnt = 0; | |
2119 | mdev->recv_cnt = 0; | |
80883197 | 2120 | } |
695d08fa | 2121 | rcu_read_unlock(); |
5ee743e9 LE |
2122 | |
2123 | retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
2124 | ||
80883197 | 2125 | conn_reconfig_done(tconn); |
3b98c0c2 | 2126 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2127 | return 0; |
2128 | ||
2129 | fail: | |
0fd0ea06 | 2130 | free_crypto(&crypto); |
b411b363 PR |
2131 | kfree(new_conf); |
2132 | ||
80883197 | 2133 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2134 | out: |
2135 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2136 | return 0; |
2137 | } | |
2138 | ||
85f75dd7 LE |
2139 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2140 | { | |
2141 | enum drbd_state_rv rv; | |
85f75dd7 | 2142 | |
f3dfa40a LE |
2143 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2144 | force ? CS_HARD : 0); | |
85f75dd7 LE |
2145 | |
2146 | switch (rv) { | |
2147 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2148 | break; |
85f75dd7 LE |
2149 | case SS_ALREADY_STANDALONE: |
2150 | return SS_SUCCESS; | |
2151 | case SS_PRIMARY_NOP: | |
2152 | /* Our state checking code wants to see the peer outdated. */ | |
2153 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
f3dfa40a | 2154 | pdsk, D_OUTDATED), CS_VERBOSE); |
85f75dd7 LE |
2155 | break; |
2156 | case SS_CW_FAILED_BY_PEER: | |
2157 | /* The peer probably wants to see us outdated. */ | |
2158 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2159 | disk, D_OUTDATED), 0); | |
2160 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
f3dfa40a LE |
2161 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2162 | CS_HARD); | |
85f75dd7 LE |
2163 | } |
2164 | break; | |
2165 | default:; | |
2166 | /* no special handling necessary */ | |
2167 | } | |
2168 | ||
f3dfa40a LE |
2169 | if (rv >= SS_SUCCESS) { |
2170 | enum drbd_state_rv rv2; | |
2171 | /* No one else can reconfigure the network while I am here. | |
2172 | * The state handling only uses drbd_thread_stop_nowait(), | |
2173 | * we want to really wait here until the receiver is no more. | |
2174 | */ | |
2175 | drbd_thread_stop(&adm_ctx.tconn->receiver); | |
2176 | ||
2177 | /* Race breaker. This additional state change request may be | |
2178 | * necessary, if this was a forced disconnect during a receiver | |
2179 | * restart. We may have "killed" the receiver thread just | |
2180 | * after drbdd_init() returned. Typically, we should be | |
2181 | * C_STANDALONE already, now, and this becomes a no-op. | |
2182 | */ | |
2183 | rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE), | |
2184 | CS_VERBOSE | CS_HARD); | |
2185 | if (rv2 < SS_SUCCESS) | |
2186 | conn_err(tconn, | |
2187 | "unexpected rv2=%d in conn_try_disconnect()\n", | |
2188 | rv2); | |
2189 | } | |
85f75dd7 LE |
2190 | return rv; |
2191 | } | |
2192 | ||
3b98c0c2 | 2193 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2194 | { |
3b98c0c2 LE |
2195 | struct disconnect_parms parms; |
2196 | struct drbd_tconn *tconn; | |
85f75dd7 | 2197 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2198 | enum drbd_ret_code retcode; |
2199 | int err; | |
2561b9c1 | 2200 | |
089c075d | 2201 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION); |
3b98c0c2 LE |
2202 | if (!adm_ctx.reply_skb) |
2203 | return retcode; | |
2204 | if (retcode != NO_ERROR) | |
2561b9c1 | 2205 | goto fail; |
3b98c0c2 LE |
2206 | |
2207 | tconn = adm_ctx.tconn; | |
2208 | memset(&parms, 0, sizeof(parms)); | |
2209 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2210 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2211 | if (err) { |
2212 | retcode = ERR_MANDATORY_TAG; | |
2213 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2214 | goto fail; | |
2215 | } | |
2561b9c1 PR |
2216 | } |
2217 | ||
85f75dd7 LE |
2218 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2219 | if (rv < SS_SUCCESS) | |
f3dfa40a LE |
2220 | retcode = rv; /* FIXME: Type mismatch. */ |
2221 | else | |
2222 | retcode = NO_ERROR; | |
b411b363 | 2223 | fail: |
3b98c0c2 | 2224 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2225 | return 0; |
2226 | } | |
2227 | ||
2228 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2229 | { | |
2230 | int iass; /* I am sync source */ | |
2231 | ||
2232 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2233 | if (mdev->state.role != mdev->state.peer) | |
2234 | iass = (mdev->state.role == R_PRIMARY); | |
2235 | else | |
25703f83 | 2236 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
2237 | |
2238 | if (iass) | |
2239 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2240 | else | |
2241 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2242 | } | |
2243 | ||
3b98c0c2 | 2244 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2245 | { |
daeda1cc | 2246 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 LE |
2247 | struct resize_parms rs; |
2248 | struct drbd_conf *mdev; | |
2249 | enum drbd_ret_code retcode; | |
b411b363 | 2250 | enum determine_dev_size dd; |
6495d2c6 | 2251 | enum dds_flags ddsf; |
daeda1cc | 2252 | sector_t u_size; |
3b98c0c2 | 2253 | int err; |
b411b363 | 2254 | |
3b98c0c2 LE |
2255 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2256 | if (!adm_ctx.reply_skb) | |
2257 | return retcode; | |
2258 | if (retcode != NO_ERROR) | |
b411b363 | 2259 | goto fail; |
3b98c0c2 LE |
2260 | |
2261 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2262 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2263 | err = resize_parms_from_attrs(&rs, info); |
3b98c0c2 LE |
2264 | if (err) { |
2265 | retcode = ERR_MANDATORY_TAG; | |
2266 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2267 | goto fail; | |
2268 | } | |
b411b363 PR |
2269 | } |
2270 | ||
3b98c0c2 | 2271 | mdev = adm_ctx.mdev; |
b411b363 PR |
2272 | if (mdev->state.conn > C_CONNECTED) { |
2273 | retcode = ERR_RESIZE_RESYNC; | |
2274 | goto fail; | |
2275 | } | |
2276 | ||
2277 | if (mdev->state.role == R_SECONDARY && | |
2278 | mdev->state.peer == R_SECONDARY) { | |
2279 | retcode = ERR_NO_PRIMARY; | |
2280 | goto fail; | |
2281 | } | |
2282 | ||
2283 | if (!get_ldev(mdev)) { | |
2284 | retcode = ERR_NO_DISK; | |
2285 | goto fail; | |
2286 | } | |
2287 | ||
31890f4a | 2288 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 | 2289 | retcode = ERR_NEED_APV_93; |
9bcd2521 | 2290 | goto fail_ldev; |
6495d2c6 PR |
2291 | } |
2292 | ||
daeda1cc PR |
2293 | rcu_read_lock(); |
2294 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
2295 | rcu_read_unlock(); | |
2296 | if (u_size != (sector_t)rs.resize_size) { | |
2297 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2298 | if (!new_disk_conf) { | |
2299 | retcode = ERR_NOMEM; | |
9bcd2521 | 2300 | goto fail_ldev; |
daeda1cc PR |
2301 | } |
2302 | } | |
2303 | ||
087c2492 | 2304 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2305 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 | 2306 | |
daeda1cc PR |
2307 | if (new_disk_conf) { |
2308 | mutex_lock(&mdev->tconn->conf_update); | |
2309 | old_disk_conf = mdev->ldev->disk_conf; | |
2310 | *new_disk_conf = *old_disk_conf; | |
2311 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
2312 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); | |
2313 | mutex_unlock(&mdev->tconn->conf_update); | |
2314 | synchronize_rcu(); | |
2315 | kfree(old_disk_conf); | |
2316 | } | |
2317 | ||
6495d2c6 | 2318 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2319 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2320 | drbd_md_sync(mdev); |
2321 | put_ldev(mdev); | |
2322 | if (dd == dev_size_error) { | |
2323 | retcode = ERR_NOMEM_BITMAP; | |
2324 | goto fail; | |
2325 | } | |
2326 | ||
087c2492 | 2327 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2328 | if (dd == grew) |
2329 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2330 | ||
2331 | drbd_send_uuids(mdev); | |
6495d2c6 | 2332 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
2333 | } |
2334 | ||
2335 | fail: | |
3b98c0c2 | 2336 | drbd_adm_finish(info, retcode); |
b411b363 | 2337 | return 0; |
9bcd2521 PR |
2338 | |
2339 | fail_ldev: | |
2340 | put_ldev(mdev); | |
2341 | goto fail; | |
b411b363 PR |
2342 | } |
2343 | ||
f399002e | 2344 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2345 | { |
3b98c0c2 | 2346 | enum drbd_ret_code retcode; |
f399002e | 2347 | struct drbd_tconn *tconn; |
b57a1e27 | 2348 | struct res_opts res_opts; |
f399002e | 2349 | int err; |
b411b363 | 2350 | |
44e52cfa | 2351 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
2352 | if (!adm_ctx.reply_skb) |
2353 | return retcode; | |
2354 | if (retcode != NO_ERROR) | |
2355 | goto fail; | |
f399002e | 2356 | tconn = adm_ctx.tconn; |
3b98c0c2 | 2357 | |
b57a1e27 | 2358 | res_opts = tconn->res_opts; |
5979e361 | 2359 | if (should_set_defaults(info)) |
b966b5dd | 2360 | set_res_opts_defaults(&res_opts); |
b411b363 | 2361 | |
b57a1e27 | 2362 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2363 | if (err && err != -ENOMSG) { |
b411b363 | 2364 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2365 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2366 | goto fail; |
2367 | } | |
2368 | ||
afbbfa88 AG |
2369 | err = set_resource_options(tconn, &res_opts); |
2370 | if (err) { | |
2371 | retcode = ERR_INVALID_REQUEST; | |
2372 | if (err == -ENOMEM) | |
2373 | retcode = ERR_NOMEM; | |
b411b363 PR |
2374 | } |
2375 | ||
b411b363 | 2376 | fail: |
3b98c0c2 | 2377 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2378 | return 0; |
2379 | } | |
2380 | ||
3b98c0c2 | 2381 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2382 | { |
3b98c0c2 LE |
2383 | struct drbd_conf *mdev; |
2384 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2385 | ||
2386 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2387 | if (!adm_ctx.reply_skb) | |
2388 | return retcode; | |
2389 | if (retcode != NO_ERROR) | |
2390 | goto out; | |
2391 | ||
2392 | mdev = adm_ctx.mdev; | |
b411b363 | 2393 | |
194bfb32 LE |
2394 | /* If there is still bitmap IO pending, probably because of a previous |
2395 | * resync just being finished, wait for it before requesting a new resync. */ | |
5016b82a | 2396 | drbd_suspend_io(mdev); |
194bfb32 LE |
2397 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
2398 | ||
b411b363 PR |
2399 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2400 | ||
2401 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2402 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2403 | ||
2404 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2405 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2406 | if (mdev->state.conn < C_CONNECTED) |
2407 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2408 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2409 | |
2410 | if (retcode != SS_NEED_CONNECTION) | |
2411 | break; | |
2412 | ||
2413 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2414 | } | |
5016b82a | 2415 | drbd_resume_io(mdev); |
b411b363 | 2416 | |
3b98c0c2 LE |
2417 | out: |
2418 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2419 | return 0; |
2420 | } | |
2421 | ||
3b98c0c2 LE |
2422 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2423 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2424 | { |
3b98c0c2 | 2425 | enum drbd_ret_code retcode; |
194bfb32 | 2426 | |
3b98c0c2 LE |
2427 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2428 | if (!adm_ctx.reply_skb) | |
2429 | return retcode; | |
2430 | if (retcode != NO_ERROR) | |
2431 | goto out; | |
b411b363 | 2432 | |
3b98c0c2 LE |
2433 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2434 | out: | |
2435 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2436 | return 0; |
2437 | } | |
2438 | ||
25b0d6c8 PR |
2439 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2440 | { | |
2441 | int rv; | |
2442 | ||
2443 | rv = drbd_bmio_set_n_write(mdev); | |
2444 | drbd_suspend_al(mdev); | |
2445 | return rv; | |
2446 | } | |
2447 | ||
3b98c0c2 | 2448 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2449 | { |
25b0d6c8 PR |
2450 | int retcode; /* drbd_ret_code, drbd_state_rv */ |
2451 | struct drbd_conf *mdev; | |
2452 | ||
2453 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2454 | if (!adm_ctx.reply_skb) | |
2455 | return retcode; | |
2456 | if (retcode != NO_ERROR) | |
2457 | goto out; | |
2458 | ||
2459 | mdev = adm_ctx.mdev; | |
2460 | ||
5016b82a LE |
2461 | /* If there is still bitmap IO pending, probably because of a previous |
2462 | * resync just being finished, wait for it before requesting a new resync. */ | |
2463 | drbd_suspend_io(mdev); | |
2464 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2465 | ||
25b0d6c8 PR |
2466 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED); |
2467 | if (retcode < SS_SUCCESS) { | |
2468 | if (retcode == SS_NEED_CONNECTION && mdev->state.role == R_PRIMARY) { | |
2469 | /* The peer will get a resync upon connect anyways. | |
2470 | * Just make that into a full resync. */ | |
2471 | retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT)); | |
2472 | if (retcode >= SS_SUCCESS) { | |
2473 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al, | |
2474 | "set_n_write from invalidate_peer", | |
2475 | BM_LOCKED_SET_ALLOWED)) | |
2476 | retcode = ERR_IO_MD_DISK; | |
2477 | } | |
2478 | } else | |
2479 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S)); | |
2480 | } | |
5016b82a | 2481 | drbd_resume_io(mdev); |
25b0d6c8 PR |
2482 | |
2483 | out: | |
2484 | drbd_adm_finish(info, retcode); | |
2485 | return 0; | |
3b98c0c2 | 2486 | } |
b411b363 | 2487 | |
3b98c0c2 LE |
2488 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2489 | { | |
2490 | enum drbd_ret_code retcode; | |
2491 | ||
2492 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2493 | if (!adm_ctx.reply_skb) | |
2494 | return retcode; | |
2495 | if (retcode != NO_ERROR) | |
2496 | goto out; | |
b411b363 | 2497 | |
3b98c0c2 LE |
2498 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2499 | retcode = ERR_PAUSE_IS_SET; | |
2500 | out: | |
2501 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2502 | return 0; |
2503 | } | |
2504 | ||
3b98c0c2 | 2505 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2506 | { |
da9fbc27 | 2507 | union drbd_dev_state s; |
3b98c0c2 LE |
2508 | enum drbd_ret_code retcode; |
2509 | ||
2510 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2511 | if (!adm_ctx.reply_skb) | |
2512 | return retcode; | |
2513 | if (retcode != NO_ERROR) | |
2514 | goto out; | |
b411b363 | 2515 | |
3b98c0c2 LE |
2516 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2517 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2518 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2519 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2520 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2521 | } else { | |
2522 | retcode = ERR_PAUSE_IS_CLEAR; | |
2523 | } | |
2524 | } | |
b411b363 | 2525 | |
3b98c0c2 LE |
2526 | out: |
2527 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2528 | return 0; |
2529 | } | |
2530 | ||
3b98c0c2 | 2531 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2532 | { |
3b98c0c2 | 2533 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2534 | } |
2535 | ||
3b98c0c2 | 2536 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2537 | { |
3b98c0c2 LE |
2538 | struct drbd_conf *mdev; |
2539 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2540 | ||
2541 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2542 | if (!adm_ctx.reply_skb) | |
2543 | return retcode; | |
2544 | if (retcode != NO_ERROR) | |
2545 | goto out; | |
2546 | ||
2547 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2548 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2549 | drbd_uuid_new_current(mdev); | |
2550 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2551 | } |
265be2d0 | 2552 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2553 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2554 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2555 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2556 | tl_clear(mdev->tconn); |
265be2d0 | 2557 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2558 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2559 | } |
2560 | drbd_resume_io(mdev); | |
2561 | ||
3b98c0c2 LE |
2562 | out: |
2563 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2564 | return 0; |
2565 | } | |
2566 | ||
3b98c0c2 | 2567 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2568 | { |
3b98c0c2 | 2569 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2570 | } |
2571 | ||
089c075d | 2572 | int nla_put_drbd_cfg_context(struct sk_buff *skb, struct drbd_tconn *tconn, unsigned vnr) |
543cc10b LE |
2573 | { |
2574 | struct nlattr *nla; | |
2575 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2576 | if (!nla) | |
2577 | goto nla_put_failure; | |
26ec9287 AG |
2578 | if (vnr != VOLUME_UNSPECIFIED && |
2579 | nla_put_u32(skb, T_ctx_volume, vnr)) | |
2580 | goto nla_put_failure; | |
2581 | if (nla_put_string(skb, T_ctx_resource_name, tconn->name)) | |
2582 | goto nla_put_failure; | |
2583 | if (tconn->my_addr_len && | |
2584 | nla_put(skb, T_ctx_my_addr, tconn->my_addr_len, &tconn->my_addr)) | |
2585 | goto nla_put_failure; | |
2586 | if (tconn->peer_addr_len && | |
2587 | nla_put(skb, T_ctx_peer_addr, tconn->peer_addr_len, &tconn->peer_addr)) | |
2588 | goto nla_put_failure; | |
543cc10b LE |
2589 | nla_nest_end(skb, nla); |
2590 | return 0; | |
2591 | ||
2592 | nla_put_failure: | |
2593 | if (nla) | |
2594 | nla_nest_cancel(skb, nla); | |
2595 | return -EMSGSIZE; | |
2596 | } | |
2597 | ||
3b98c0c2 LE |
2598 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2599 | const struct sib_info *sib) | |
b411b363 | 2600 | { |
3b98c0c2 | 2601 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
44ed167d | 2602 | struct net_conf *nc; |
3b98c0c2 LE |
2603 | struct nlattr *nla; |
2604 | int got_ldev; | |
3b98c0c2 LE |
2605 | int err = 0; |
2606 | int exclude_sensitive; | |
2607 | ||
2608 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2609 | * to. So we better exclude_sensitive information. | |
2610 | * | |
2611 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2612 | * in the context of the requesting user process. Exclude sensitive | |
2613 | * information, unless current has superuser. | |
2614 | * | |
2615 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2616 | * relies on the current implementation of netlink_dump(), which | |
2617 | * executes the dump callback successively from netlink_recvmsg(), | |
2618 | * always in the context of the receiving process */ | |
2619 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2620 | ||
2621 | got_ldev = get_ldev(mdev); | |
3b98c0c2 LE |
2622 | |
2623 | /* We need to add connection name and volume number information still. | |
2624 | * Minor number is in drbd_genlmsghdr. */ | |
089c075d | 2625 | if (nla_put_drbd_cfg_context(skb, mdev->tconn, mdev->vnr)) |
3b98c0c2 | 2626 | goto nla_put_failure; |
3b98c0c2 | 2627 | |
f399002e LE |
2628 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2629 | goto nla_put_failure; | |
2630 | ||
daeda1cc | 2631 | rcu_read_lock(); |
3b98c0c2 | 2632 | if (got_ldev) |
daeda1cc | 2633 | if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive)) |
3b98c0c2 | 2634 | goto nla_put_failure; |
44ed167d | 2635 | |
44ed167d PR |
2636 | nc = rcu_dereference(mdev->tconn->net_conf); |
2637 | if (nc) | |
2638 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2639 | rcu_read_unlock(); | |
2640 | if (err) | |
2641 | goto nla_put_failure; | |
3b98c0c2 | 2642 | |
3b98c0c2 LE |
2643 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2644 | if (!nla) | |
2645 | goto nla_put_failure; | |
26ec9287 AG |
2646 | if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) || |
2647 | nla_put_u32(skb, T_current_state, mdev->state.i) || | |
2648 | nla_put_u64(skb, T_ed_uuid, mdev->ed_uuid) || | |
2649 | nla_put_u64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev))) | |
2650 | goto nla_put_failure; | |
3b98c0c2 LE |
2651 | |
2652 | if (got_ldev) { | |
26ec9287 AG |
2653 | if (nla_put_u32(skb, T_disk_flags, mdev->ldev->md.flags) || |
2654 | nla_put(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid) || | |
2655 | nla_put_u64(skb, T_bits_total, drbd_bm_bits(mdev)) || | |
2656 | nla_put_u64(skb, T_bits_oos, drbd_bm_total_weight(mdev))) | |
2657 | goto nla_put_failure; | |
3b98c0c2 LE |
2658 | if (C_SYNC_SOURCE <= mdev->state.conn && |
2659 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
26ec9287 AG |
2660 | if (nla_put_u64(skb, T_bits_rs_total, mdev->rs_total) || |
2661 | nla_put_u64(skb, T_bits_rs_failed, mdev->rs_failed)) | |
2662 | goto nla_put_failure; | |
3b98c0c2 | 2663 | } |
b411b363 PR |
2664 | } |
2665 | ||
3b98c0c2 LE |
2666 | if (sib) { |
2667 | switch(sib->sib_reason) { | |
2668 | case SIB_SYNC_PROGRESS: | |
2669 | case SIB_GET_STATUS_REPLY: | |
2670 | break; | |
2671 | case SIB_STATE_CHANGE: | |
26ec9287 AG |
2672 | if (nla_put_u32(skb, T_prev_state, sib->os.i) || |
2673 | nla_put_u32(skb, T_new_state, sib->ns.i)) | |
2674 | goto nla_put_failure; | |
3b98c0c2 LE |
2675 | break; |
2676 | case SIB_HELPER_POST: | |
26ec9287 AG |
2677 | if (nla_put_u32(skb, T_helper_exit_code, |
2678 | sib->helper_exit_code)) | |
2679 | goto nla_put_failure; | |
3b98c0c2 LE |
2680 | /* fall through */ |
2681 | case SIB_HELPER_PRE: | |
26ec9287 AG |
2682 | if (nla_put_string(skb, T_helper, sib->helper_name)) |
2683 | goto nla_put_failure; | |
3b98c0c2 LE |
2684 | break; |
2685 | } | |
b411b363 | 2686 | } |
3b98c0c2 | 2687 | nla_nest_end(skb, nla); |
b411b363 | 2688 | |
3b98c0c2 LE |
2689 | if (0) |
2690 | nla_put_failure: | |
2691 | err = -EMSGSIZE; | |
2692 | if (got_ldev) | |
2693 | put_ldev(mdev); | |
3b98c0c2 | 2694 | return err; |
b411b363 PR |
2695 | } |
2696 | ||
3b98c0c2 | 2697 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2698 | { |
3b98c0c2 LE |
2699 | enum drbd_ret_code retcode; |
2700 | int err; | |
b411b363 | 2701 | |
3b98c0c2 LE |
2702 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2703 | if (!adm_ctx.reply_skb) | |
2704 | return retcode; | |
2705 | if (retcode != NO_ERROR) | |
2706 | goto out; | |
b411b363 | 2707 | |
3b98c0c2 LE |
2708 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2709 | if (err) { | |
2710 | nlmsg_free(adm_ctx.reply_skb); | |
2711 | return err; | |
b411b363 | 2712 | } |
3b98c0c2 LE |
2713 | out: |
2714 | drbd_adm_finish(info, retcode); | |
2715 | return 0; | |
b411b363 PR |
2716 | } |
2717 | ||
71932efc | 2718 | int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2719 | { |
3b98c0c2 LE |
2720 | struct drbd_conf *mdev; |
2721 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2722 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2723 | struct drbd_tconn *tconn = NULL; | |
2724 | struct drbd_tconn *tmp; | |
2725 | unsigned volume = cb->args[1]; | |
2726 | ||
2727 | /* Open coded, deferred, iteration: | |
2728 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2729 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2730 | * ... | |
2731 | * } | |
2732 | * } | |
2733 | * where tconn is cb->args[0]; | |
2734 | * and i is cb->args[1]; | |
2735 | * | |
71932efc LE |
2736 | * cb->args[2] indicates if we shall loop over all resources, |
2737 | * or just dump all volumes of a single resource. | |
2738 | * | |
3b98c0c2 LE |
2739 | * This may miss entries inserted after this dump started, |
2740 | * or entries deleted before they are reached. | |
543cc10b LE |
2741 | * |
2742 | * We need to make sure the mdev won't disappear while | |
2743 | * we are looking at it, and revalidate our iterators | |
2744 | * on each iteration. | |
2745 | */ | |
3b98c0c2 | 2746 | |
9dc9fbb3 | 2747 | /* synchronize with conn_create()/conn_destroy() */ |
c141ebda | 2748 | rcu_read_lock(); |
543cc10b | 2749 | /* revalidate iterator position */ |
ec0bddbc | 2750 | list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) { |
543cc10b LE |
2751 | if (pos == NULL) { |
2752 | /* first iteration */ | |
2753 | pos = tmp; | |
2754 | tconn = pos; | |
2755 | break; | |
2756 | } | |
2757 | if (tmp == pos) { | |
2758 | tconn = pos; | |
2759 | break; | |
2760 | } | |
2761 | } | |
2762 | if (tconn) { | |
71932efc | 2763 | next_tconn: |
543cc10b LE |
2764 | mdev = idr_get_next(&tconn->volumes, &volume); |
2765 | if (!mdev) { | |
2766 | /* No more volumes to dump on this tconn. | |
2767 | * Advance tconn iterator. */ | |
ec0bddbc PR |
2768 | pos = list_entry_rcu(tconn->all_tconn.next, |
2769 | struct drbd_tconn, all_tconn); | |
71932efc | 2770 | /* Did we dump any volume on this tconn yet? */ |
543cc10b | 2771 | if (volume != 0) { |
71932efc LE |
2772 | /* If we reached the end of the list, |
2773 | * or only a single resource dump was requested, | |
2774 | * we are done. */ | |
2775 | if (&pos->all_tconn == &drbd_tconns || cb->args[2]) | |
2776 | goto out; | |
543cc10b | 2777 | volume = 0; |
71932efc | 2778 | tconn = pos; |
543cc10b LE |
2779 | goto next_tconn; |
2780 | } | |
2781 | } | |
2782 | ||
3b98c0c2 LE |
2783 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2784 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2785 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2786 | if (!dh) | |
543cc10b LE |
2787 | goto out; |
2788 | ||
2789 | if (!mdev) { | |
367d675d LE |
2790 | /* This is a tconn without a single volume. |
2791 | * Suprisingly enough, it may have a network | |
2792 | * configuration. */ | |
2793 | struct net_conf *nc; | |
543cc10b LE |
2794 | dh->minor = -1U; |
2795 | dh->ret_code = NO_ERROR; | |
089c075d | 2796 | if (nla_put_drbd_cfg_context(skb, tconn, VOLUME_UNSPECIFIED)) |
367d675d LE |
2797 | goto cancel; |
2798 | nc = rcu_dereference(tconn->net_conf); | |
2799 | if (nc && net_conf_to_skb(skb, nc, 1) != 0) | |
2800 | goto cancel; | |
2801 | goto done; | |
543cc10b | 2802 | } |
3b98c0c2 | 2803 | |
543cc10b LE |
2804 | D_ASSERT(mdev->vnr == volume); |
2805 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2806 | |
543cc10b | 2807 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2808 | dh->ret_code = NO_ERROR; |
2809 | ||
2810 | if (nla_put_status_info(skb, mdev, NULL)) { | |
367d675d | 2811 | cancel: |
3b98c0c2 | 2812 | genlmsg_cancel(skb, dh); |
543cc10b | 2813 | goto out; |
3b98c0c2 | 2814 | } |
367d675d | 2815 | done: |
3b98c0c2 LE |
2816 | genlmsg_end(skb, dh); |
2817 | } | |
b411b363 | 2818 | |
543cc10b | 2819 | out: |
c141ebda | 2820 | rcu_read_unlock(); |
543cc10b LE |
2821 | /* where to start the next iteration */ |
2822 | cb->args[0] = (long)pos; | |
2823 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2824 | |
543cc10b LE |
2825 | /* No more tconns/volumes/minors found results in an empty skb. |
2826 | * Which will terminate the dump. */ | |
3b98c0c2 | 2827 | return skb->len; |
b411b363 PR |
2828 | } |
2829 | ||
71932efc LE |
2830 | /* |
2831 | * Request status of all resources, or of all volumes within a single resource. | |
2832 | * | |
2833 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
2834 | * Which means we cannot use the family->attrbuf or other such members, because | |
2835 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
2836 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
2837 | * | |
2838 | * Once things are setup properly, we call into get_one_status(). | |
2839 | */ | |
2840 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) | |
2841 | { | |
2842 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
2843 | struct nlattr *nla; | |
7c3063cc | 2844 | const char *resource_name; |
71932efc | 2845 | struct drbd_tconn *tconn; |
7c3063cc | 2846 | int maxtype; |
71932efc LE |
2847 | |
2848 | /* Is this a followup call? */ | |
2849 | if (cb->args[0]) { | |
2850 | /* ... of a single resource dump, | |
2851 | * and the resource iterator has been advanced already? */ | |
2852 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
2853 | return 0; /* DONE. */ | |
2854 | goto dump; | |
2855 | } | |
2856 | ||
2857 | /* First call (from netlink_dump_start). We need to figure out | |
2858 | * which resource(s) the user wants us to dump. */ | |
2859 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
2860 | nlmsg_attrlen(cb->nlh, hdrlen), | |
2861 | DRBD_NLA_CFG_CONTEXT); | |
2862 | ||
2863 | /* No explicit context given. Dump all. */ | |
2864 | if (!nla) | |
2865 | goto dump; | |
7c3063cc AG |
2866 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
2867 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
2868 | if (IS_ERR(nla)) | |
2869 | return PTR_ERR(nla); | |
71932efc LE |
2870 | /* context given, but no name present? */ |
2871 | if (!nla) | |
2872 | return -EINVAL; | |
7c3063cc AG |
2873 | resource_name = nla_data(nla); |
2874 | tconn = conn_get_by_name(resource_name); | |
0ace9dfa | 2875 | |
71932efc LE |
2876 | if (!tconn) |
2877 | return -ENODEV; | |
2878 | ||
0ace9dfa PR |
2879 | kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */ |
2880 | ||
71932efc LE |
2881 | /* prime iterators, and set "filter" mode mark: |
2882 | * only dump this tconn. */ | |
2883 | cb->args[0] = (long)tconn; | |
2884 | /* cb->args[1] = 0; passed in this way. */ | |
2885 | cb->args[2] = (long)tconn; | |
2886 | ||
2887 | dump: | |
2888 | return get_one_status(skb, cb); | |
2889 | } | |
2890 | ||
3b98c0c2 | 2891 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2892 | { |
3b98c0c2 LE |
2893 | enum drbd_ret_code retcode; |
2894 | struct timeout_parms tp; | |
2895 | int err; | |
b411b363 | 2896 | |
3b98c0c2 LE |
2897 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2898 | if (!adm_ctx.reply_skb) | |
2899 | return retcode; | |
2900 | if (retcode != NO_ERROR) | |
2901 | goto out; | |
b411b363 | 2902 | |
3b98c0c2 LE |
2903 | tp.timeout_type = |
2904 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2905 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2906 | UT_DEFAULT; | |
b411b363 | 2907 | |
3b98c0c2 LE |
2908 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2909 | if (err) { | |
2910 | nlmsg_free(adm_ctx.reply_skb); | |
2911 | return err; | |
2912 | } | |
2913 | out: | |
2914 | drbd_adm_finish(info, retcode); | |
2915 | return 0; | |
b411b363 PR |
2916 | } |
2917 | ||
3b98c0c2 | 2918 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2919 | { |
3b98c0c2 LE |
2920 | struct drbd_conf *mdev; |
2921 | enum drbd_ret_code retcode; | |
b411b363 | 2922 | |
3b98c0c2 LE |
2923 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2924 | if (!adm_ctx.reply_skb) | |
2925 | return retcode; | |
2926 | if (retcode != NO_ERROR) | |
2927 | goto out; | |
873b0d5f | 2928 | |
3b98c0c2 LE |
2929 | mdev = adm_ctx.mdev; |
2930 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2931 | /* resume from last known position, if possible */ | |
2932 | struct start_ov_parms parms = | |
2933 | { .ov_start_sector = mdev->ov_start_sector }; | |
f399002e | 2934 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2935 | if (err) { |
2936 | retcode = ERR_MANDATORY_TAG; | |
2937 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2938 | goto out; | |
2939 | } | |
2940 | /* w_make_ov_request expects position to be aligned */ | |
2941 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2942 | } | |
873b0d5f LE |
2943 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2944 | * just being finished, wait for it before requesting a new resync. */ | |
5016b82a | 2945 | drbd_suspend_io(mdev); |
873b0d5f | 2946 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
3b98c0c2 | 2947 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
5016b82a | 2948 | drbd_resume_io(mdev); |
3b98c0c2 LE |
2949 | out: |
2950 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2951 | return 0; |
2952 | } | |
2953 | ||
2954 | ||
3b98c0c2 | 2955 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2956 | { |
3b98c0c2 LE |
2957 | struct drbd_conf *mdev; |
2958 | enum drbd_ret_code retcode; | |
b411b363 PR |
2959 | int skip_initial_sync = 0; |
2960 | int err; | |
3b98c0c2 | 2961 | struct new_c_uuid_parms args; |
b411b363 | 2962 | |
3b98c0c2 LE |
2963 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2964 | if (!adm_ctx.reply_skb) | |
2965 | return retcode; | |
2966 | if (retcode != NO_ERROR) | |
2967 | goto out_nolock; | |
b411b363 | 2968 | |
3b98c0c2 LE |
2969 | mdev = adm_ctx.mdev; |
2970 | memset(&args, 0, sizeof(args)); | |
2971 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 2972 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
2973 | if (err) { |
2974 | retcode = ERR_MANDATORY_TAG; | |
2975 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2976 | goto out_nolock; | |
2977 | } | |
b411b363 PR |
2978 | } |
2979 | ||
8410da8f | 2980 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2981 | |
2982 | if (!get_ldev(mdev)) { | |
2983 | retcode = ERR_NO_DISK; | |
2984 | goto out; | |
2985 | } | |
2986 | ||
2987 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2988 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2989 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2990 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2991 | skip_initial_sync = 1; | |
2992 | } else if (mdev->state.conn != C_STANDALONE) { | |
2993 | retcode = ERR_CONNECTED; | |
2994 | goto out_dec; | |
2995 | } | |
2996 | ||
2997 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2998 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2999 | ||
3000 | if (args.clear_bm) { | |
20ceb2b2 LE |
3001 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
3002 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
3003 | if (err) { |
3004 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
3005 | retcode = ERR_IO_MD_DISK; | |
3006 | } | |
3007 | if (skip_initial_sync) { | |
3008 | drbd_send_uuids_skip_initial_sync(mdev); | |
3009 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 3010 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 3011 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
3012 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
3013 | CS_VERBOSE, NULL); | |
87eeee41 | 3014 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
3015 | } |
3016 | } | |
3017 | ||
3018 | drbd_md_sync(mdev); | |
3019 | out_dec: | |
3020 | put_ldev(mdev); | |
3021 | out: | |
8410da8f | 3022 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
3023 | out_nolock: |
3024 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
3025 | return 0; |
3026 | } | |
3027 | ||
3b98c0c2 | 3028 | static enum drbd_ret_code |
7c3063cc | 3029 | drbd_check_resource_name(const char *name) |
774b3055 | 3030 | { |
3b98c0c2 | 3031 | if (!name || !name[0]) { |
7c3063cc | 3032 | drbd_msg_put_info("resource name missing"); |
3b98c0c2 | 3033 | return ERR_MANDATORY_TAG; |
774b3055 | 3034 | } |
3b98c0c2 LE |
3035 | /* if we want to use these in sysfs/configfs/debugfs some day, |
3036 | * we must not allow slashes */ | |
3037 | if (strchr(name, '/')) { | |
7c3063cc | 3038 | drbd_msg_put_info("invalid resource name"); |
3b98c0c2 | 3039 | return ERR_INVALID_REQUEST; |
774b3055 | 3040 | } |
3b98c0c2 | 3041 | return NO_ERROR; |
774b3055 PR |
3042 | } |
3043 | ||
789c1b62 | 3044 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3045 | { |
3b98c0c2 | 3046 | enum drbd_ret_code retcode; |
afbbfa88 AG |
3047 | struct res_opts res_opts; |
3048 | int err; | |
9f5180e5 | 3049 | |
3b98c0c2 LE |
3050 | retcode = drbd_adm_prepare(skb, info, 0); |
3051 | if (!adm_ctx.reply_skb) | |
3052 | return retcode; | |
3053 | if (retcode != NO_ERROR) | |
3054 | goto out; | |
b411b363 | 3055 | |
afbbfa88 AG |
3056 | set_res_opts_defaults(&res_opts); |
3057 | err = res_opts_from_attrs(&res_opts, info); | |
3058 | if (err && err != -ENOMSG) { | |
3059 | retcode = ERR_MANDATORY_TAG; | |
3060 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
3061 | goto out; | |
3062 | } | |
3063 | ||
7c3063cc | 3064 | retcode = drbd_check_resource_name(adm_ctx.resource_name); |
3b98c0c2 LE |
3065 | if (retcode != NO_ERROR) |
3066 | goto out; | |
b411b363 | 3067 | |
3b98c0c2 | 3068 | if (adm_ctx.tconn) { |
38f19616 LE |
3069 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
3070 | retcode = ERR_INVALID_REQUEST; | |
789c1b62 | 3071 | drbd_msg_put_info("resource exists"); |
38f19616 LE |
3072 | } |
3073 | /* else: still NO_ERROR */ | |
3b98c0c2 | 3074 | goto out; |
b411b363 PR |
3075 | } |
3076 | ||
afbbfa88 | 3077 | if (!conn_create(adm_ctx.resource_name, &res_opts)) |
b411b363 | 3078 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
3079 | out: |
3080 | drbd_adm_finish(info, retcode); | |
3081 | return 0; | |
b411b363 PR |
3082 | } |
3083 | ||
3b98c0c2 | 3084 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3085 | { |
3b98c0c2 LE |
3086 | struct drbd_genlmsghdr *dh = info->userhdr; |
3087 | enum drbd_ret_code retcode; | |
b411b363 | 3088 | |
44e52cfa | 3089 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
3090 | if (!adm_ctx.reply_skb) |
3091 | return retcode; | |
3092 | if (retcode != NO_ERROR) | |
3093 | goto out; | |
b411b363 | 3094 | |
f2257a56 | 3095 | if (dh->minor > MINORMASK) { |
3b98c0c2 LE |
3096 | drbd_msg_put_info("requested minor out of range"); |
3097 | retcode = ERR_INVALID_REQUEST; | |
3098 | goto out; | |
b411b363 | 3099 | } |
0c8e36d9 | 3100 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
3101 | drbd_msg_put_info("requested volume id out of range"); |
3102 | retcode = ERR_INVALID_REQUEST; | |
3103 | goto out; | |
b411b363 | 3104 | } |
b411b363 | 3105 | |
38f19616 LE |
3106 | /* drbd_adm_prepare made sure already |
3107 | * that mdev->tconn and mdev->vnr match the request. */ | |
3108 | if (adm_ctx.mdev) { | |
3109 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
3110 | retcode = ERR_MINOR_EXISTS; | |
3111 | /* else: still NO_ERROR */ | |
3112 | goto out; | |
3113 | } | |
3114 | ||
3b98c0c2 LE |
3115 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
3116 | out: | |
3117 | drbd_adm_finish(info, retcode); | |
3118 | return 0; | |
b411b363 PR |
3119 | } |
3120 | ||
85f75dd7 LE |
3121 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
3122 | { | |
3123 | if (mdev->state.disk == D_DISKLESS && | |
3124 | /* no need to be mdev->state.conn == C_STANDALONE && | |
3125 | * we may want to delete a minor from a live replication group. | |
3126 | */ | |
3127 | mdev->state.role == R_SECONDARY) { | |
369bea63 PR |
3128 | _drbd_request_state(mdev, NS(conn, C_WF_REPORT_PARAMS), |
3129 | CS_VERBOSE + CS_WAIT_COMPLETE); | |
81fa2e67 PR |
3130 | idr_remove(&mdev->tconn->volumes, mdev->vnr); |
3131 | idr_remove(&minors, mdev_to_minor(mdev)); | |
3132 | del_gendisk(mdev->vdisk); | |
3133 | synchronize_rcu(); | |
3134 | kref_put(&mdev->kref, &drbd_minor_destroy); | |
85f75dd7 LE |
3135 | return NO_ERROR; |
3136 | } else | |
3137 | return ERR_MINOR_CONFIGURED; | |
3138 | } | |
3139 | ||
3b98c0c2 | 3140 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3141 | { |
3b98c0c2 | 3142 | enum drbd_ret_code retcode; |
b411b363 | 3143 | |
3b98c0c2 LE |
3144 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
3145 | if (!adm_ctx.reply_skb) | |
3146 | return retcode; | |
3147 | if (retcode != NO_ERROR) | |
3148 | goto out; | |
b411b363 | 3149 | |
85f75dd7 | 3150 | retcode = adm_delete_minor(adm_ctx.mdev); |
85f75dd7 LE |
3151 | out: |
3152 | drbd_adm_finish(info, retcode); | |
3153 | return 0; | |
3154 | } | |
3155 | ||
3156 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
3157 | { | |
f3dfa40a | 3158 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 LE |
3159 | struct drbd_conf *mdev; |
3160 | unsigned i; | |
3161 | ||
3162 | retcode = drbd_adm_prepare(skb, info, 0); | |
3163 | if (!adm_ctx.reply_skb) | |
3164 | return retcode; | |
3165 | if (retcode != NO_ERROR) | |
3166 | goto out; | |
3167 | ||
3168 | if (!adm_ctx.tconn) { | |
789c1b62 | 3169 | retcode = ERR_RES_NOT_KNOWN; |
85f75dd7 LE |
3170 | goto out; |
3171 | } | |
3172 | ||
85f75dd7 LE |
3173 | /* demote */ |
3174 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3175 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
3176 | if (retcode < SS_SUCCESS) { | |
3177 | drbd_msg_put_info("failed to demote"); | |
c141ebda | 3178 | goto out; |
85f75dd7 LE |
3179 | } |
3180 | } | |
3181 | ||
f3dfa40a LE |
3182 | retcode = conn_try_disconnect(adm_ctx.tconn, 0); |
3183 | if (retcode < SS_SUCCESS) { | |
85f75dd7 | 3184 | drbd_msg_put_info("failed to disconnect"); |
f3dfa40a | 3185 | goto out; |
85f75dd7 LE |
3186 | } |
3187 | ||
3188 | /* detach */ | |
3189 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
cdfda633 | 3190 | retcode = adm_detach(mdev, 0); |
f3dfa40a | 3191 | if (retcode < SS_SUCCESS) { |
85f75dd7 | 3192 | drbd_msg_put_info("failed to detach"); |
c141ebda | 3193 | goto out; |
85f75dd7 LE |
3194 | } |
3195 | } | |
3196 | ||
f3dfa40a LE |
3197 | /* If we reach this, all volumes (of this tconn) are Secondary, |
3198 | * Disconnected, Diskless, aka Unconfigured. Make sure all threads have | |
c141ebda | 3199 | * actually stopped, state handling only does drbd_thread_stop_nowait(). */ |
f3dfa40a LE |
3200 | drbd_thread_stop(&adm_ctx.tconn->worker); |
3201 | ||
3202 | /* Now, nothing can fail anymore */ | |
3203 | ||
85f75dd7 LE |
3204 | /* delete volumes */ |
3205 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3206 | retcode = adm_delete_minor(mdev); | |
3207 | if (retcode != NO_ERROR) { | |
3208 | /* "can not happen" */ | |
3209 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 | 3210 | goto out; |
85f75dd7 LE |
3211 | } |
3212 | } | |
3213 | ||
85f75dd7 LE |
3214 | /* delete connection */ |
3215 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3216 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3217 | synchronize_rcu(); | |
9dc9fbb3 PR |
3218 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3219 | ||
85f75dd7 LE |
3220 | retcode = NO_ERROR; |
3221 | } else { | |
3222 | /* "can not happen" */ | |
789c1b62 | 3223 | retcode = ERR_RES_IN_USE; |
85f75dd7 | 3224 | drbd_msg_put_info("failed to delete connection"); |
85f75dd7 | 3225 | } |
ef356262 | 3226 | goto out; |
3b98c0c2 LE |
3227 | out: |
3228 | drbd_adm_finish(info, retcode); | |
3229 | return 0; | |
b411b363 PR |
3230 | } |
3231 | ||
789c1b62 | 3232 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3233 | { |
3b98c0c2 | 3234 | enum drbd_ret_code retcode; |
b411b363 | 3235 | |
44e52cfa | 3236 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
3237 | if (!adm_ctx.reply_skb) |
3238 | return retcode; | |
3239 | if (retcode != NO_ERROR) | |
3240 | goto out; | |
3241 | ||
3242 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3243 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3244 | synchronize_rcu(); | |
9dc9fbb3 PR |
3245 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3246 | ||
3b98c0c2 LE |
3247 | retcode = NO_ERROR; |
3248 | } else { | |
789c1b62 | 3249 | retcode = ERR_RES_IN_USE; |
b411b363 PR |
3250 | } |
3251 | ||
992d6e91 LE |
3252 | if (retcode == NO_ERROR) |
3253 | drbd_thread_stop(&adm_ctx.tconn->worker); | |
3b98c0c2 LE |
3254 | out: |
3255 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3256 | return 0; |
3257 | } | |
3258 | ||
3b98c0c2 | 3259 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3260 | { |
3b98c0c2 LE |
3261 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3262 | struct sk_buff *msg; | |
3263 | struct drbd_genlmsghdr *d_out; | |
3264 | unsigned seq; | |
3265 | int err = -ENOMEM; | |
3266 | ||
3267 | seq = atomic_inc_return(&drbd_genl_seq); | |
3268 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3269 | if (!msg) | |
3270 | goto failed; | |
3271 | ||
3272 | err = -EMSGSIZE; | |
3273 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3274 | if (!d_out) /* cannot happen, but anyways. */ | |
3275 | goto nla_put_failure; | |
3276 | d_out->minor = mdev_to_minor(mdev); | |
6f9b5f84 | 3277 | d_out->ret_code = NO_ERROR; |
3b98c0c2 LE |
3278 | |
3279 | if (nla_put_status_info(msg, mdev, sib)) | |
3280 | goto nla_put_failure; | |
3281 | genlmsg_end(msg, d_out); | |
3282 | err = drbd_genl_multicast_events(msg, 0); | |
3283 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3284 | if (err && err != -ESRCH) | |
3285 | goto failed; | |
b411b363 | 3286 | |
3b98c0c2 | 3287 | return; |
b411b363 | 3288 | |
3b98c0c2 LE |
3289 | nla_put_failure: |
3290 | nlmsg_free(msg); | |
3291 | failed: | |
3292 | dev_err(DEV, "Error %d while broadcasting event. " | |
3293 | "Event seq:%u sib_reason:%u\n", | |
3294 | err, seq, sib->sib_reason); | |
b411b363 | 3295 | } |