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Commit | Line | Data |
---|---|---|
b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
265be2d0 | 35 | #include "drbd_req.h" |
b411b363 PR |
36 | #include "drbd_wrappers.h" |
37 | #include <asm/unaligned.h> | |
b411b363 | 38 | #include <linux/drbd_limits.h> |
87f7be4c | 39 | #include <linux/kthread.h> |
b411b363 | 40 | |
3b98c0c2 LE |
41 | #include <net/genetlink.h> |
42 | ||
43 | /* .doit */ | |
44 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
45 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
46 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
789c1b62 AG |
50 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info); |
51 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 52 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
53 | |
54 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 56 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
57 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); |
58 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 59 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
60 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); |
61 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
62 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
63 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
64 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
65 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
66 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
67 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
68 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
69 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
70 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 71 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
72 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); |
73 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
74 | /* .dumpit */ | |
75 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
76 | ||
77 | #include <linux/drbd_genl_api.h> | |
78 | #include <linux/genl_magic_func.h> | |
79 | ||
80 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
81 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
82 | ||
3b98c0c2 LE |
83 | /* Configuration is strictly serialized, because generic netlink message |
84 | * processing is strictly serialized by the genl_lock(). | |
85 | * Which means we can use one static global drbd_config_context struct. | |
86 | */ | |
87 | static struct drbd_config_context { | |
88 | /* assigned from drbd_genlmsghdr */ | |
89 | unsigned int minor; | |
90 | /* assigned from request attributes, if present */ | |
91 | unsigned int volume; | |
92 | #define VOLUME_UNSPECIFIED (-1U) | |
93 | /* pointer into the request skb, | |
94 | * limited lifetime! */ | |
7c3063cc | 95 | char *resource_name; |
3b98c0c2 LE |
96 | |
97 | /* reply buffer */ | |
98 | struct sk_buff *reply_skb; | |
99 | /* pointer into reply buffer */ | |
100 | struct drbd_genlmsghdr *reply_dh; | |
101 | /* resolved from attributes, if possible */ | |
102 | struct drbd_conf *mdev; | |
103 | struct drbd_tconn *tconn; | |
104 | } adm_ctx; | |
105 | ||
106 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
107 | { | |
108 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
109 | if (genlmsg_reply(skb, info)) | |
110 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 111 | } |
3b98c0c2 LE |
112 | |
113 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
114 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 115 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
116 | { |
117 | struct sk_buff *skb = adm_ctx.reply_skb; | |
118 | struct nlattr *nla; | |
119 | int err = -EMSGSIZE; | |
120 | ||
121 | if (!info || !info[0]) | |
122 | return 0; | |
123 | ||
124 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
125 | if (!nla) | |
126 | return err; | |
127 | ||
128 | err = nla_put_string(skb, T_info_text, info); | |
129 | if (err) { | |
130 | nla_nest_cancel(skb, nla); | |
131 | return err; | |
132 | } else | |
133 | nla_nest_end(skb, nla); | |
134 | return 0; | |
b411b363 PR |
135 | } |
136 | ||
3b98c0c2 LE |
137 | /* This would be a good candidate for a "pre_doit" hook, |
138 | * and per-family private info->pointers. | |
139 | * But we need to stay compatible with older kernels. | |
140 | * If it returns successfully, adm_ctx members are valid. | |
141 | */ | |
142 | #define DRBD_ADM_NEED_MINOR 1 | |
143 | #define DRBD_ADM_NEED_CONN 2 | |
144 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, | |
145 | unsigned flags) | |
146 | { | |
147 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
148 | const u8 cmd = info->genlhdr->cmd; | |
149 | int err; | |
150 | ||
151 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
152 | ||
153 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
154 | if (cmd != DRBD_ADM_GET_STATUS | |
155 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
156 | return -EPERM; | |
157 | ||
158 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1e2a2551 AG |
159 | if (!adm_ctx.reply_skb) { |
160 | err = -ENOMEM; | |
3b98c0c2 | 161 | goto fail; |
1e2a2551 | 162 | } |
3b98c0c2 LE |
163 | |
164 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
165 | info, &drbd_genl_family, 0, cmd); | |
166 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
167 | * but anyways */ | |
1e2a2551 AG |
168 | if (!adm_ctx.reply_dh) { |
169 | err = -ENOMEM; | |
3b98c0c2 | 170 | goto fail; |
1e2a2551 | 171 | } |
3b98c0c2 LE |
172 | |
173 | adm_ctx.reply_dh->minor = d_in->minor; | |
174 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
175 | ||
176 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { | |
177 | struct nlattr *nla; | |
178 | /* parse and validate only */ | |
f399002e | 179 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
180 | if (err) |
181 | goto fail; | |
182 | ||
183 | /* It was present, and valid, | |
184 | * copy it over to the reply skb. */ | |
185 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
186 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
187 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
188 | if (err) | |
189 | goto fail; | |
190 | ||
191 | /* and assign stuff to the global adm_ctx */ | |
192 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
193 | adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; | |
7c3063cc | 194 | nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
3b98c0c2 | 195 | if (nla) |
7c3063cc | 196 | adm_ctx.resource_name = nla_data(nla); |
3b98c0c2 LE |
197 | } else |
198 | adm_ctx.volume = VOLUME_UNSPECIFIED; | |
199 | ||
200 | adm_ctx.minor = d_in->minor; | |
201 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
7c3063cc | 202 | adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name); |
3b98c0c2 LE |
203 | |
204 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
205 | drbd_msg_put_info("unknown minor"); | |
206 | return ERR_MINOR_INVALID; | |
207 | } | |
208 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { | |
209 | drbd_msg_put_info("unknown connection"); | |
210 | return ERR_INVALID_REQUEST; | |
211 | } | |
212 | ||
213 | /* some more paranoia, if the request was over-determined */ | |
527f4b24 LE |
214 | if (adm_ctx.mdev && adm_ctx.tconn && |
215 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
216 | pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", | |
7c3063cc AG |
217 | adm_ctx.minor, adm_ctx.resource_name, |
218 | adm_ctx.mdev->tconn->name); | |
527f4b24 LE |
219 | drbd_msg_put_info("minor exists in different connection"); |
220 | return ERR_INVALID_REQUEST; | |
221 | } | |
3b98c0c2 LE |
222 | if (adm_ctx.mdev && |
223 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
224 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
225 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
226 | adm_ctx.minor, adm_ctx.volume, | |
227 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 228 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
229 | return ERR_INVALID_REQUEST; |
230 | } | |
0ace9dfa | 231 | |
3b98c0c2 LE |
232 | return NO_ERROR; |
233 | ||
234 | fail: | |
235 | nlmsg_free(adm_ctx.reply_skb); | |
236 | adm_ctx.reply_skb = NULL; | |
1e2a2551 | 237 | return err; |
3b98c0c2 LE |
238 | } |
239 | ||
240 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
241 | { | |
242 | struct nlattr *nla; | |
7c3063cc | 243 | const char *resource_name = NULL; |
3b98c0c2 | 244 | |
0ace9dfa PR |
245 | if (adm_ctx.tconn) { |
246 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
247 | adm_ctx.tconn = NULL; | |
248 | } | |
249 | ||
3b98c0c2 LE |
250 | if (!adm_ctx.reply_skb) |
251 | return -ENOMEM; | |
252 | ||
253 | adm_ctx.reply_dh->ret_code = retcode; | |
254 | ||
255 | nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; | |
256 | if (nla) { | |
7c3063cc AG |
257 | int maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
258 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
259 | if (nla && !IS_ERR(nla)) | |
260 | resource_name = nla_data(nla); | |
3b98c0c2 LE |
261 | } |
262 | ||
263 | drbd_adm_send_reply(adm_ctx.reply_skb, info); | |
264 | return 0; | |
265 | } | |
b411b363 | 266 | |
6b75dced | 267 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 268 | { |
6b75dced | 269 | char *afs; |
44ed167d | 270 | struct net_conf *nc; |
b411b363 | 271 | |
44ed167d PR |
272 | rcu_read_lock(); |
273 | nc = rcu_dereference(tconn->net_conf); | |
274 | if (nc) { | |
275 | switch (((struct sockaddr *)nc->peer_addr)->sa_family) { | |
b411b363 PR |
276 | case AF_INET6: |
277 | afs = "ipv6"; | |
6b75dced | 278 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
44ed167d | 279 | &((struct sockaddr_in6 *)nc->peer_addr)->sin6_addr); |
b411b363 PR |
280 | break; |
281 | case AF_INET: | |
282 | afs = "ipv4"; | |
6b75dced | 283 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 284 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 PR |
285 | break; |
286 | default: | |
287 | afs = "ssocks"; | |
6b75dced | 288 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 289 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 | 290 | } |
6b75dced | 291 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
b411b363 | 292 | } |
44ed167d | 293 | rcu_read_unlock(); |
6b75dced PR |
294 | } |
295 | ||
296 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
297 | { | |
298 | char *envp[] = { "HOME=/", | |
299 | "TERM=linux", | |
300 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
301 | (char[20]) { }, /* address family */ | |
302 | (char[60]) { }, /* address */ | |
303 | NULL }; | |
304 | char mb[12]; | |
305 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
306 | struct sib_info sib; | |
307 | int ret; | |
308 | ||
309 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
310 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 311 | |
1090c056 LE |
312 | /* The helper may take some time. |
313 | * write out any unsynced meta data changes now */ | |
314 | drbd_md_sync(mdev); | |
315 | ||
b411b363 | 316 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
317 | sib.sib_reason = SIB_HELPER_PRE; |
318 | sib.helper_name = cmd; | |
319 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
320 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
321 | if (ret) | |
322 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
323 | usermode_helper, cmd, mb, | |
324 | (ret >> 8) & 0xff, ret); | |
325 | else | |
326 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
327 | usermode_helper, cmd, mb, | |
328 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
329 | sib.sib_reason = SIB_HELPER_POST; |
330 | sib.helper_exit_code = ret; | |
331 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
332 | |
333 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
334 | ret = 0; | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
6b75dced PR |
339 | static void conn_md_sync(struct drbd_tconn *tconn) |
340 | { | |
341 | struct drbd_conf *mdev; | |
e90285e0 | 342 | int vnr; |
6b75dced | 343 | |
c141ebda PR |
344 | rcu_read_lock(); |
345 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { | |
346 | kref_get(&mdev->kref); | |
347 | rcu_read_unlock(); | |
6b75dced | 348 | drbd_md_sync(mdev); |
c141ebda PR |
349 | kref_put(&mdev->kref, &drbd_minor_destroy); |
350 | rcu_read_lock(); | |
351 | } | |
352 | rcu_read_unlock(); | |
6b75dced PR |
353 | } |
354 | ||
355 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
356 | { | |
357 | char *envp[] = { "HOME=/", | |
358 | "TERM=linux", | |
359 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
360 | (char[20]) { }, /* address family */ | |
361 | (char[60]) { }, /* address */ | |
362 | NULL }; | |
363 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
364 | int ret; | |
365 | ||
366 | setup_khelper_env(tconn, envp); | |
367 | conn_md_sync(tconn); | |
368 | ||
369 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
370 | /* TODO: conn_bcast_event() ?? */ | |
371 | ||
372 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
373 | if (ret) | |
374 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
375 | usermode_helper, cmd, tconn->name, | |
376 | (ret >> 8) & 0xff, ret); | |
377 | else | |
378 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
379 | usermode_helper, cmd, tconn->name, | |
380 | (ret >> 8) & 0xff, ret); | |
381 | /* TODO: conn_bcast_event() ?? */ | |
382 | ||
383 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
384 | ret = 0; | |
385 | ||
386 | return ret; | |
387 | } | |
388 | ||
cb703454 | 389 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 390 | { |
cb703454 PR |
391 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
392 | struct drbd_conf *mdev; | |
393 | int vnr; | |
394 | ||
695d08fa | 395 | rcu_read_lock(); |
cb703454 PR |
396 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
397 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
daeda1cc PR |
398 | fp = max_t(enum drbd_fencing_p, fp, |
399 | rcu_dereference(mdev->ldev->disk_conf)->fencing); | |
cb703454 PR |
400 | put_ldev(mdev); |
401 | } | |
402 | } | |
695d08fa | 403 | rcu_read_unlock(); |
cb703454 PR |
404 | |
405 | return fp; | |
406 | } | |
407 | ||
408 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
409 | { | |
410 | union drbd_state mask = { }; | |
411 | union drbd_state val = { }; | |
412 | enum drbd_fencing_p fp; | |
b411b363 PR |
413 | char *ex_to_string; |
414 | int r; | |
b411b363 | 415 | |
cb703454 PR |
416 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
417 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
418 | return false; | |
419 | } | |
b411b363 | 420 | |
cb703454 PR |
421 | fp = highest_fencing_policy(tconn); |
422 | switch (fp) { | |
423 | case FP_NOT_AVAIL: | |
424 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 425 | goto out; |
cb703454 PR |
426 | case FP_DONT_CARE: |
427 | return true; | |
428 | default: ; | |
b411b363 PR |
429 | } |
430 | ||
cb703454 | 431 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
432 | |
433 | switch ((r>>8) & 0xff) { | |
434 | case 3: /* peer is inconsistent */ | |
435 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
436 | mask.pdsk = D_MASK; |
437 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
438 | break; |
439 | case 4: /* peer got outdated, or was already outdated */ | |
440 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
441 | mask.pdsk = D_MASK; |
442 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
443 | break; |
444 | case 5: /* peer was down */ | |
cb703454 | 445 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
446 | /* we will(have) create(d) a new UUID anyways... */ |
447 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
448 | mask.pdsk = D_MASK; |
449 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
450 | } else { |
451 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
452 | } |
453 | break; | |
454 | case 6: /* Peer is primary, voluntarily outdate myself. | |
455 | * This is useful when an unconnected R_SECONDARY is asked to | |
456 | * become R_PRIMARY, but finds the other peer being active. */ | |
457 | ex_to_string = "peer is active"; | |
cb703454 PR |
458 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
459 | mask.disk = D_MASK; | |
460 | val.disk = D_OUTDATED; | |
b411b363 PR |
461 | break; |
462 | case 7: | |
463 | if (fp != FP_STONITH) | |
cb703454 | 464 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 465 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
466 | mask.pdsk = D_MASK; |
467 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
468 | break; |
469 | default: | |
470 | /* The script is broken ... */ | |
cb703454 PR |
471 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
472 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
473 | } |
474 | ||
cb703454 PR |
475 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
476 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 477 | |
cb703454 | 478 | out: |
fb22c402 | 479 | |
cb703454 PR |
480 | /* Not using |
481 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
482 | here, because we might were able to re-establish the connection in the | |
483 | meantime. */ | |
484 | spin_lock_irq(&tconn->req_lock); | |
485 | if (tconn->cstate < C_WF_REPORT_PARAMS) | |
486 | _conn_request_state(tconn, mask, val, CS_VERBOSE); | |
487 | spin_unlock_irq(&tconn->req_lock); | |
488 | ||
489 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
490 | } |
491 | ||
87f7be4c PR |
492 | static int _try_outdate_peer_async(void *data) |
493 | { | |
cb703454 | 494 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 495 | |
cb703454 | 496 | conn_try_outdate_peer(tconn); |
87f7be4c | 497 | |
9dc9fbb3 | 498 | kref_put(&tconn->kref, &conn_destroy); |
87f7be4c PR |
499 | return 0; |
500 | } | |
501 | ||
cb703454 | 502 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
503 | { |
504 | struct task_struct *opa; | |
505 | ||
9dc9fbb3 | 506 | kref_get(&tconn->kref); |
cb703454 | 507 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
9dc9fbb3 | 508 | if (IS_ERR(opa)) { |
cb703454 | 509 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
9dc9fbb3 PR |
510 | kref_put(&tconn->kref, &conn_destroy); |
511 | } | |
87f7be4c | 512 | } |
b411b363 | 513 | |
bf885f8a AG |
514 | enum drbd_state_rv |
515 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
516 | { |
517 | const int max_tries = 4; | |
bf885f8a | 518 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 519 | struct net_conf *nc; |
b411b363 PR |
520 | int try = 0; |
521 | int forced = 0; | |
522 | union drbd_state mask, val; | |
b411b363 PR |
523 | |
524 | if (new_role == R_PRIMARY) | |
0625ac19 | 525 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 526 | |
8410da8f | 527 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
528 | |
529 | mask.i = 0; mask.role = R_MASK; | |
530 | val.i = 0; val.role = new_role; | |
531 | ||
532 | while (try++ < max_tries) { | |
bf885f8a | 533 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
534 | |
535 | /* in case we first succeeded to outdate, | |
536 | * but now suddenly could establish a connection */ | |
bf885f8a | 537 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
538 | val.pdsk = 0; |
539 | mask.pdsk = 0; | |
540 | continue; | |
541 | } | |
542 | ||
bf885f8a | 543 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
544 | (mdev->state.disk < D_UP_TO_DATE && |
545 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
546 | mask.disk = D_MASK; |
547 | val.disk = D_UP_TO_DATE; | |
548 | forced = 1; | |
549 | continue; | |
550 | } | |
551 | ||
bf885f8a | 552 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
553 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
554 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 555 | |
cb703454 | 556 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
557 | val.disk = D_UP_TO_DATE; |
558 | mask.disk = D_MASK; | |
559 | } | |
b411b363 PR |
560 | continue; |
561 | } | |
562 | ||
bf885f8a | 563 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 564 | goto out; |
bf885f8a | 565 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 566 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 567 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
568 | mask.pdsk = D_MASK; |
569 | val.pdsk = D_OUTDATED; | |
b411b363 | 570 | |
cb703454 | 571 | } |
b411b363 PR |
572 | continue; |
573 | } | |
bf885f8a | 574 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
575 | /* Maybe the peer is detected as dead very soon... |
576 | retry at most once more in this case. */ | |
44ed167d PR |
577 | int timeo; |
578 | rcu_read_lock(); | |
579 | nc = rcu_dereference(mdev->tconn->net_conf); | |
580 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
581 | rcu_read_unlock(); | |
582 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
583 | if (try < max_tries) |
584 | try = max_tries - 1; | |
585 | continue; | |
586 | } | |
bf885f8a AG |
587 | if (rv < SS_SUCCESS) { |
588 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 589 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 590 | if (rv < SS_SUCCESS) |
3b98c0c2 | 591 | goto out; |
b411b363 PR |
592 | } |
593 | break; | |
594 | } | |
595 | ||
bf885f8a | 596 | if (rv < SS_SUCCESS) |
3b98c0c2 | 597 | goto out; |
b411b363 PR |
598 | |
599 | if (forced) | |
600 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
601 | ||
602 | /* Wait until nothing is on the fly :) */ | |
603 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
604 | ||
605 | if (new_role == R_SECONDARY) { | |
81e84650 | 606 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
607 | if (get_ldev(mdev)) { |
608 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
609 | put_ldev(mdev); | |
610 | } | |
611 | } else { | |
a0095508 | 612 | mutex_lock(&mdev->tconn->conf_update); |
91fd4dad | 613 | nc = mdev->tconn->net_conf; |
44ed167d | 614 | if (nc) |
6139f60d | 615 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
a0095508 | 616 | mutex_unlock(&mdev->tconn->conf_update); |
91fd4dad | 617 | |
81e84650 | 618 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
619 | if (get_ldev(mdev)) { |
620 | if (((mdev->state.conn < C_CONNECTED || | |
621 | mdev->state.pdsk <= D_FAILED) | |
622 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
623 | drbd_uuid_new_current(mdev); | |
624 | ||
625 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
626 | put_ldev(mdev); | |
627 | } | |
628 | } | |
629 | ||
19f843aa LE |
630 | /* writeout of activity log covered areas of the bitmap |
631 | * to stable storage done in after state change already */ | |
b411b363 PR |
632 | |
633 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
634 | /* if this was forced, we should consider sync */ | |
635 | if (forced) | |
636 | drbd_send_uuids(mdev); | |
637 | drbd_send_state(mdev); | |
638 | } | |
639 | ||
640 | drbd_md_sync(mdev); | |
641 | ||
642 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 643 | out: |
8410da8f | 644 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 645 | return rv; |
b411b363 PR |
646 | } |
647 | ||
3b98c0c2 | 648 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 649 | { |
3b98c0c2 LE |
650 | return err == -ENOMSG ? "required attribute missing" : |
651 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 652 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 653 | "invalid attribute value"; |
b411b363 PR |
654 | } |
655 | ||
3b98c0c2 | 656 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 657 | { |
3b98c0c2 LE |
658 | struct set_role_parms parms; |
659 | int err; | |
660 | enum drbd_ret_code retcode; | |
b411b363 | 661 | |
3b98c0c2 LE |
662 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
663 | if (!adm_ctx.reply_skb) | |
664 | return retcode; | |
665 | if (retcode != NO_ERROR) | |
666 | goto out; | |
667 | ||
668 | memset(&parms, 0, sizeof(parms)); | |
669 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 670 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
671 | if (err) { |
672 | retcode = ERR_MANDATORY_TAG; | |
673 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
674 | goto out; | |
675 | } | |
676 | } | |
677 | ||
678 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
679 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
680 | else | |
681 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
682 | out: | |
683 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
684 | return 0; |
685 | } | |
686 | ||
687 | /* initializes the md.*_offset members, so we are able to find | |
688 | * the on disk meta data */ | |
689 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
690 | struct drbd_backing_dev *bdev) | |
691 | { | |
692 | sector_t md_size_sect = 0; | |
daeda1cc PR |
693 | int meta_dev_idx; |
694 | ||
695 | rcu_read_lock(); | |
696 | meta_dev_idx = rcu_dereference(bdev->disk_conf)->meta_dev_idx; | |
697 | ||
698 | switch (meta_dev_idx) { | |
b411b363 PR |
699 | default: |
700 | /* v07 style fixed size indexed meta data */ | |
701 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
702 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
703 | bdev->md.al_offset = MD_AL_OFFSET; | |
704 | bdev->md.bm_offset = MD_BM_OFFSET; | |
705 | break; | |
706 | case DRBD_MD_INDEX_FLEX_EXT: | |
707 | /* just occupy the full device; unit: sectors */ | |
708 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
709 | bdev->md.md_offset = 0; | |
710 | bdev->md.al_offset = MD_AL_OFFSET; | |
711 | bdev->md.bm_offset = MD_BM_OFFSET; | |
712 | break; | |
713 | case DRBD_MD_INDEX_INTERNAL: | |
714 | case DRBD_MD_INDEX_FLEX_INT: | |
715 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
716 | /* al size is still fixed */ | |
7ad651b5 | 717 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
718 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
719 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
720 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
721 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
722 | md_size_sect = ALIGN(md_size_sect, 8); | |
723 | ||
724 | /* plus the "drbd meta data super block", | |
725 | * and the activity log; */ | |
726 | md_size_sect += MD_BM_OFFSET; | |
727 | ||
728 | bdev->md.md_size_sect = md_size_sect; | |
729 | /* bitmap offset is adjusted by 'super' block size */ | |
730 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
731 | break; | |
732 | } | |
daeda1cc | 733 | rcu_read_unlock(); |
b411b363 PR |
734 | } |
735 | ||
4b0715f0 | 736 | /* input size is expected to be in KB */ |
b411b363 PR |
737 | char *ppsize(char *buf, unsigned long long size) |
738 | { | |
4b0715f0 LE |
739 | /* Needs 9 bytes at max including trailing NUL: |
740 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
741 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
742 | int base = 0; | |
4b0715f0 | 743 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
744 | /* shift + round */ |
745 | size = (size >> 10) + !!(size & (1<<9)); | |
746 | base++; | |
747 | } | |
4b0715f0 | 748 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
749 | |
750 | return buf; | |
751 | } | |
752 | ||
753 | /* there is still a theoretical deadlock when called from receiver | |
754 | * on an D_INCONSISTENT R_PRIMARY: | |
755 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
756 | * packet from remote to dec_ap_bio again. | |
757 | * receiver receive_sizes(), comes here, | |
758 | * waits for ap_bio_cnt == 0. -> deadlock. | |
759 | * but this cannot happen, actually, because: | |
760 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
761 | * (not connected, or bad/no disk on peer): | |
762 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
763 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
764 | * peer may not initiate a resize. | |
765 | */ | |
3b98c0c2 LE |
766 | /* Note these are not to be confused with |
767 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
768 | * which are (sub) state changes triggered by admin (drbdsetup), | |
769 | * and can be long lived. | |
770 | * This changes an mdev->flag, is triggered by drbd internals, | |
771 | * and should be short-lived. */ | |
b411b363 PR |
772 | void drbd_suspend_io(struct drbd_conf *mdev) |
773 | { | |
774 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 775 | if (drbd_suspended(mdev)) |
265be2d0 | 776 | return; |
b411b363 PR |
777 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
778 | } | |
779 | ||
780 | void drbd_resume_io(struct drbd_conf *mdev) | |
781 | { | |
782 | clear_bit(SUSPEND_IO, &mdev->flags); | |
783 | wake_up(&mdev->misc_wait); | |
784 | } | |
785 | ||
786 | /** | |
787 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
788 | * @mdev: DRBD device. | |
789 | * | |
790 | * Returns 0 on success, negative return values indicate errors. | |
791 | * You should call drbd_md_sync() after calling this function. | |
792 | */ | |
24c4830c | 793 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
794 | { |
795 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
ef5e44a6 | 796 | sector_t la_size, u_size; |
b411b363 PR |
797 | sector_t size; |
798 | char ppb[10]; | |
799 | ||
800 | int md_moved, la_size_changed; | |
801 | enum determine_dev_size rv = unchanged; | |
802 | ||
803 | /* race: | |
804 | * application request passes inc_ap_bio, | |
805 | * but then cannot get an AL-reference. | |
806 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
807 | * | |
808 | * to avoid that: | |
809 | * Suspend IO right here. | |
810 | * still lock the act_log to not trigger ASSERTs there. | |
811 | */ | |
812 | drbd_suspend_io(mdev); | |
813 | ||
814 | /* no wait necessary anymore, actually we could assert that */ | |
815 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
816 | ||
817 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
818 | prev_size = mdev->ldev->md.md_size_sect; | |
819 | la_size = mdev->ldev->md.la_size_sect; | |
820 | ||
821 | /* TODO: should only be some assert here, not (re)init... */ | |
822 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
823 | ||
daeda1cc PR |
824 | rcu_read_lock(); |
825 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
826 | rcu_read_unlock(); | |
ef5e44a6 | 827 | size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED); |
b411b363 PR |
828 | |
829 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
830 | drbd_bm_capacity(mdev) != size) { | |
831 | int err; | |
02d9a94b | 832 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
833 | if (unlikely(err)) { |
834 | /* currently there is only one error: ENOMEM! */ | |
835 | size = drbd_bm_capacity(mdev)>>1; | |
836 | if (size == 0) { | |
837 | dev_err(DEV, "OUT OF MEMORY! " | |
838 | "Could not allocate bitmap!\n"); | |
839 | } else { | |
840 | dev_err(DEV, "BM resizing failed. " | |
841 | "Leaving size unchanged at size = %lu KB\n", | |
842 | (unsigned long)size); | |
843 | } | |
844 | rv = dev_size_error; | |
845 | } | |
846 | /* racy, see comments above. */ | |
847 | drbd_set_my_capacity(mdev, size); | |
848 | mdev->ldev->md.la_size_sect = size; | |
849 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
850 | (unsigned long long)size>>1); | |
851 | } | |
852 | if (rv == dev_size_error) | |
853 | goto out; | |
854 | ||
855 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
856 | ||
857 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
858 | || prev_size != mdev->ldev->md.md_size_sect; | |
859 | ||
860 | if (la_size_changed || md_moved) { | |
24dccabb AG |
861 | int err; |
862 | ||
b411b363 PR |
863 | drbd_al_shrink(mdev); /* All extents inactive. */ |
864 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
865 | la_size_changed && md_moved ? "size changed and md moved" : | |
866 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
867 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
868 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
869 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
870 | if (err) { |
871 | rv = dev_size_error; | |
872 | goto out; | |
873 | } | |
b411b363 PR |
874 | drbd_md_mark_dirty(mdev); |
875 | } | |
876 | ||
877 | if (size > la_size) | |
878 | rv = grew; | |
879 | if (size < la_size) | |
880 | rv = shrunk; | |
881 | out: | |
882 | lc_unlock(mdev->act_log); | |
883 | wake_up(&mdev->al_wait); | |
884 | drbd_resume_io(mdev); | |
885 | ||
886 | return rv; | |
887 | } | |
888 | ||
889 | sector_t | |
ef5e44a6 PR |
890 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, |
891 | sector_t u_size, int assume_peer_has_space) | |
b411b363 PR |
892 | { |
893 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
894 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
895 | sector_t m_size; /* my size */ | |
b411b363 PR |
896 | sector_t size = 0; |
897 | ||
898 | m_size = drbd_get_max_capacity(bdev); | |
899 | ||
a393db6f PR |
900 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
901 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
902 | p_size = m_size; | |
903 | } | |
904 | ||
b411b363 PR |
905 | if (p_size && m_size) { |
906 | size = min_t(sector_t, p_size, m_size); | |
907 | } else { | |
908 | if (la_size) { | |
909 | size = la_size; | |
910 | if (m_size && m_size < size) | |
911 | size = m_size; | |
912 | if (p_size && p_size < size) | |
913 | size = p_size; | |
914 | } else { | |
915 | if (m_size) | |
916 | size = m_size; | |
917 | if (p_size) | |
918 | size = p_size; | |
919 | } | |
920 | } | |
921 | ||
922 | if (size == 0) | |
923 | dev_err(DEV, "Both nodes diskless!\n"); | |
924 | ||
925 | if (u_size) { | |
926 | if (u_size > size) | |
927 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
928 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
929 | else | |
930 | size = u_size; | |
931 | } | |
932 | ||
933 | return size; | |
934 | } | |
935 | ||
936 | /** | |
937 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
938 | * @mdev: DRBD device. | |
939 | * | |
940 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
941 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
942 | * this function. | |
943 | */ | |
f399002e | 944 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
945 | { |
946 | struct lru_cache *n, *t; | |
947 | struct lc_element *e; | |
948 | unsigned int in_use; | |
949 | int i; | |
950 | ||
b411b363 | 951 | if (mdev->act_log && |
f399002e | 952 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
953 | return 0; |
954 | ||
955 | in_use = 0; | |
956 | t = mdev->act_log; | |
7ad651b5 | 957 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 958 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
959 | |
960 | if (n == NULL) { | |
961 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
962 | return -ENOMEM; | |
963 | } | |
964 | spin_lock_irq(&mdev->al_lock); | |
965 | if (t) { | |
966 | for (i = 0; i < t->nr_elements; i++) { | |
967 | e = lc_element_by_index(t, i); | |
968 | if (e->refcnt) | |
969 | dev_err(DEV, "refcnt(%d)==%d\n", | |
970 | e->lc_number, e->refcnt); | |
971 | in_use += e->refcnt; | |
972 | } | |
973 | } | |
974 | if (!in_use) | |
975 | mdev->act_log = n; | |
976 | spin_unlock_irq(&mdev->al_lock); | |
977 | if (in_use) { | |
978 | dev_err(DEV, "Activity log still in use!\n"); | |
979 | lc_destroy(n); | |
980 | return -EBUSY; | |
981 | } else { | |
982 | if (t) | |
983 | lc_destroy(t); | |
984 | } | |
985 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
986 | return 0; | |
987 | } | |
988 | ||
99432fcc | 989 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
990 | { |
991 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
992 | int max_hw_sectors = max_bio_size >> 9; |
993 | int max_segments = 0; | |
994 | ||
995 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
996 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
997 | ||
998 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc PR |
999 | rcu_read_lock(); |
1000 | max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs; | |
1001 | rcu_read_unlock(); | |
99432fcc PR |
1002 | put_ldev(mdev); |
1003 | } | |
b411b363 | 1004 | |
b411b363 | 1005 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
1006 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1007 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1008 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
1009 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 1010 | |
99432fcc PR |
1011 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1012 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
1013 | ||
1014 | blk_queue_stack_limits(q, b); | |
1015 | ||
1016 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
1017 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
1018 | q->backing_dev_info.ra_pages, | |
1019 | b->backing_dev_info.ra_pages); | |
1020 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
1021 | } | |
1022 | put_ldev(mdev); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
1027 | { | |
1028 | int now, new, local, peer; | |
1029 | ||
1030 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
1031 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1032 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1033 | |
99432fcc PR |
1034 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1035 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
1036 | mdev->local_max_bio_size = local; | |
1037 | put_ldev(mdev); | |
b411b363 | 1038 | } |
99432fcc PR |
1039 | |
1040 | /* We may ignore peer limits if the peer is modern enough. | |
1041 | Because new from 8.3.8 onwards the peer can use multiple | |
1042 | BIOs for a single peer_request */ | |
1043 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1044 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 1045 | peer = mdev->peer_max_bio_size; |
31890f4a | 1046 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
1047 | peer = DRBD_MAX_SIZE_H80_PACKET; |
1048 | else /* drbd 8.3.8 onwards */ | |
1049 | peer = DRBD_MAX_BIO_SIZE; | |
1050 | } | |
1051 | ||
1052 | new = min_t(int, local, peer); | |
1053 | ||
1054 | if (mdev->state.role == R_PRIMARY && new < now) | |
1055 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1056 | ||
1057 | if (new != now) | |
1058 | dev_info(DEV, "max BIO size = %u\n", new); | |
1059 | ||
1060 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1061 | } |
1062 | ||
a18e9d1e | 1063 | /* Starts the worker thread */ |
0e29d163 | 1064 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1065 | { |
0e29d163 PR |
1066 | drbd_thread_start(&tconn->worker); |
1067 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1068 | } |
1069 | ||
a18e9d1e | 1070 | /* if still unconfigured, stops worker again. */ |
0e29d163 | 1071 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1072 | { |
992d6e91 | 1073 | bool stop_threads; |
0e29d163 | 1074 | spin_lock_irq(&tconn->req_lock); |
992d6e91 | 1075 | stop_threads = conn_all_vols_unconf(tconn); |
0e29d163 | 1076 | spin_unlock_irq(&tconn->req_lock); |
992d6e91 LE |
1077 | if (stop_threads) { |
1078 | /* asender is implicitly stopped by receiver | |
81fa2e67 | 1079 | * in conn_disconnect() */ |
992d6e91 LE |
1080 | drbd_thread_stop(&tconn->receiver); |
1081 | drbd_thread_stop(&tconn->worker); | |
1082 | } | |
b411b363 PR |
1083 | } |
1084 | ||
0778286a PR |
1085 | /* Make sure IO is suspended before calling this function(). */ |
1086 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1087 | { | |
1088 | int s = 0; | |
1089 | ||
61610420 | 1090 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1091 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1092 | return; | |
1093 | } | |
1094 | ||
61610420 | 1095 | drbd_al_shrink(mdev); |
87eeee41 | 1096 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1097 | if (mdev->state.conn < C_CONNECTED) |
1098 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1099 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1100 | lc_unlock(mdev->act_log); |
0778286a PR |
1101 | |
1102 | if (s) | |
1103 | dev_info(DEV, "Suspended AL updates\n"); | |
1104 | } | |
1105 | ||
5979e361 LE |
1106 | |
1107 | static bool should_set_defaults(struct genl_info *info) | |
1108 | { | |
1109 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1110 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1111 | } | |
1112 | ||
d589a21e PR |
1113 | static void enforce_disk_conf_limits(struct disk_conf *dc) |
1114 | { | |
1115 | if (dc->al_extents < DRBD_AL_EXTENTS_MIN) | |
1116 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
1117 | if (dc->al_extents > DRBD_AL_EXTENTS_MAX) | |
1118 | dc->al_extents = DRBD_AL_EXTENTS_MAX; | |
1119 | ||
1120 | if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1121 | dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
1122 | } | |
1123 | ||
f399002e LE |
1124 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1125 | { | |
1126 | enum drbd_ret_code retcode; | |
1127 | struct drbd_conf *mdev; | |
daeda1cc | 1128 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1129 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1130 | int err, fifo_size; |
f399002e LE |
1131 | |
1132 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1133 | if (!adm_ctx.reply_skb) | |
1134 | return retcode; | |
1135 | if (retcode != NO_ERROR) | |
1136 | goto out; | |
1137 | ||
1138 | mdev = adm_ctx.mdev; | |
1139 | ||
1140 | /* we also need a disk | |
1141 | * to change the options on */ | |
1142 | if (!get_ldev(mdev)) { | |
1143 | retcode = ERR_NO_DISK; | |
1144 | goto out; | |
1145 | } | |
1146 | ||
daeda1cc | 1147 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1148 | if (!new_disk_conf) { |
f399002e LE |
1149 | retcode = ERR_NOMEM; |
1150 | goto fail; | |
1151 | } | |
1152 | ||
daeda1cc PR |
1153 | mutex_lock(&mdev->tconn->conf_update); |
1154 | old_disk_conf = mdev->ldev->disk_conf; | |
1155 | *new_disk_conf = *old_disk_conf; | |
5979e361 | 1156 | if (should_set_defaults(info)) |
b966b5dd | 1157 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1158 | |
5ecc72c3 | 1159 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1160 | if (err && err != -ENOMSG) { |
f399002e LE |
1161 | retcode = ERR_MANDATORY_TAG; |
1162 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1163 | } | |
1164 | ||
5ecc72c3 LE |
1165 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1166 | new_disk_conf->resync_rate = 1; | |
f399002e | 1167 | |
d589a21e | 1168 | enforce_disk_conf_limits(new_disk_conf); |
f399002e | 1169 | |
5ecc72c3 | 1170 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
9958c857 | 1171 | if (fifo_size != mdev->rs_plan_s->size) { |
813472ce PR |
1172 | new_plan = fifo_alloc(fifo_size); |
1173 | if (!new_plan) { | |
f399002e LE |
1174 | dev_err(DEV, "kmalloc of fifo_buffer failed"); |
1175 | retcode = ERR_NOMEM; | |
daeda1cc | 1176 | goto fail_unlock; |
f399002e LE |
1177 | } |
1178 | } | |
1179 | ||
f399002e LE |
1180 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); |
1181 | drbd_al_shrink(mdev); | |
5ecc72c3 | 1182 | err = drbd_check_al_size(mdev, new_disk_conf); |
f399002e LE |
1183 | lc_unlock(mdev->act_log); |
1184 | wake_up(&mdev->al_wait); | |
1185 | ||
1186 | if (err) { | |
1187 | retcode = ERR_NOMEM; | |
daeda1cc | 1188 | goto fail_unlock; |
f399002e LE |
1189 | } |
1190 | ||
dc97b708 | 1191 | write_lock_irq(&global_state_lock); |
95f8efd0 | 1192 | retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after); |
dc97b708 | 1193 | if (retcode == NO_ERROR) { |
daeda1cc | 1194 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); |
95f8efd0 | 1195 | drbd_resync_after_changed(mdev); |
dc97b708 PR |
1196 | } |
1197 | write_unlock_irq(&global_state_lock); | |
f399002e | 1198 | |
daeda1cc PR |
1199 | if (retcode != NO_ERROR) |
1200 | goto fail_unlock; | |
f399002e | 1201 | |
813472ce PR |
1202 | if (new_plan) { |
1203 | old_plan = mdev->rs_plan_s; | |
1204 | rcu_assign_pointer(mdev->rs_plan_s, new_plan); | |
9958c857 | 1205 | } |
9958c857 | 1206 | |
c141ebda | 1207 | mutex_unlock(&mdev->tconn->conf_update); |
daeda1cc | 1208 | drbd_md_sync(mdev); |
f399002e LE |
1209 | |
1210 | if (mdev->state.conn >= C_CONNECTED) | |
1211 | drbd_send_sync_param(mdev); | |
1212 | ||
daeda1cc PR |
1213 | synchronize_rcu(); |
1214 | kfree(old_disk_conf); | |
813472ce | 1215 | kfree(old_plan); |
daeda1cc PR |
1216 | goto success; |
1217 | ||
1218 | fail_unlock: | |
1219 | mutex_unlock(&mdev->tconn->conf_update); | |
f399002e | 1220 | fail: |
5ecc72c3 | 1221 | kfree(new_disk_conf); |
813472ce | 1222 | kfree(new_plan); |
daeda1cc PR |
1223 | success: |
1224 | put_ldev(mdev); | |
f399002e LE |
1225 | out: |
1226 | drbd_adm_finish(info, retcode); | |
1227 | return 0; | |
1228 | } | |
1229 | ||
3b98c0c2 | 1230 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1231 | { |
3b98c0c2 LE |
1232 | struct drbd_conf *mdev; |
1233 | int err; | |
116676ca | 1234 | enum drbd_ret_code retcode; |
b411b363 PR |
1235 | enum determine_dev_size dd; |
1236 | sector_t max_possible_sectors; | |
1237 | sector_t min_md_device_sectors; | |
1238 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1239 | struct disk_conf *new_disk_conf = NULL; |
e525fd89 | 1240 | struct block_device *bdev; |
b411b363 | 1241 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1242 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1243 | union drbd_state ns, os; |
f2024e7c | 1244 | enum drbd_state_rv rv; |
44ed167d | 1245 | struct net_conf *nc; |
b411b363 | 1246 | int cp_discovered = 0; |
b411b363 | 1247 | |
3b98c0c2 LE |
1248 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1249 | if (!adm_ctx.reply_skb) | |
1250 | return retcode; | |
1251 | if (retcode != NO_ERROR) | |
40cbf085 | 1252 | goto finish; |
3b98c0c2 LE |
1253 | |
1254 | mdev = adm_ctx.mdev; | |
0e29d163 | 1255 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1256 | |
1257 | /* if you want to reconfigure, please tear down first */ | |
1258 | if (mdev->state.disk > D_DISKLESS) { | |
1259 | retcode = ERR_DISK_CONFIGURED; | |
1260 | goto fail; | |
1261 | } | |
82f59cc6 LE |
1262 | /* It may just now have detached because of IO error. Make sure |
1263 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1264 | * e.g. if someone calls attach from the on-io-error handler, | |
1265 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1266 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1267 | |
3b98c0c2 | 1268 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1269 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1270 | if (!nbc) { | |
1271 | retcode = ERR_NOMEM; | |
1272 | goto fail; | |
1273 | } | |
daeda1cc PR |
1274 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1275 | if (!new_disk_conf) { | |
1276 | retcode = ERR_NOMEM; | |
1277 | goto fail; | |
1278 | } | |
1279 | nbc->disk_conf = new_disk_conf; | |
b411b363 | 1280 | |
daeda1cc PR |
1281 | set_disk_conf_defaults(new_disk_conf); |
1282 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1283 | if (err) { |
b411b363 | 1284 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1285 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1286 | goto fail; |
1287 | } | |
1288 | ||
d589a21e PR |
1289 | enforce_disk_conf_limits(new_disk_conf); |
1290 | ||
9958c857 PR |
1291 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1292 | if (!new_plan) { | |
1293 | retcode = ERR_NOMEM; | |
1294 | goto fail; | |
1295 | } | |
1296 | ||
daeda1cc | 1297 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1298 | retcode = ERR_MD_IDX_INVALID; |
1299 | goto fail; | |
1300 | } | |
1301 | ||
44ed167d PR |
1302 | rcu_read_lock(); |
1303 | nc = rcu_dereference(mdev->tconn->net_conf); | |
1304 | if (nc) { | |
daeda1cc | 1305 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1306 | rcu_read_unlock(); |
47ff2d0a PR |
1307 | retcode = ERR_STONITH_AND_PROT_A; |
1308 | goto fail; | |
1309 | } | |
1310 | } | |
44ed167d | 1311 | rcu_read_unlock(); |
47ff2d0a | 1312 | |
daeda1cc | 1313 | bdev = blkdev_get_by_path(new_disk_conf->backing_dev, |
d4d77629 | 1314 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); |
e525fd89 | 1315 | if (IS_ERR(bdev)) { |
daeda1cc | 1316 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev, |
e525fd89 | 1317 | PTR_ERR(bdev)); |
b411b363 PR |
1318 | retcode = ERR_OPEN_DISK; |
1319 | goto fail; | |
1320 | } | |
e525fd89 TH |
1321 | nbc->backing_bdev = bdev; |
1322 | ||
1323 | /* | |
1324 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1325 | * drbd sharing one meta device. TODO in that case, paranoia | |
1326 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1327 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1328 | * should check it for you already; but if you don't, or | |
1329 | * someone fooled it, we need to double check here) | |
1330 | */ | |
daeda1cc | 1331 | bdev = blkdev_get_by_path(new_disk_conf->meta_dev, |
d4d77629 | 1332 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, |
daeda1cc | 1333 | (new_disk_conf->meta_dev_idx < 0) ? |
d4d77629 | 1334 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1335 | if (IS_ERR(bdev)) { |
daeda1cc | 1336 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev, |
e525fd89 | 1337 | PTR_ERR(bdev)); |
b411b363 PR |
1338 | retcode = ERR_OPEN_MD_DISK; |
1339 | goto fail; | |
1340 | } | |
e525fd89 | 1341 | nbc->md_bdev = bdev; |
b411b363 | 1342 | |
e525fd89 | 1343 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1344 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1345 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1346 | retcode = ERR_MD_IDX_INVALID; |
b411b363 PR |
1347 | goto fail; |
1348 | } | |
1349 | ||
1350 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1351 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1352 | offsetof(struct bm_extent, lce)); |
1353 | if (!resync_lru) { | |
1354 | retcode = ERR_NOMEM; | |
e525fd89 | 1355 | goto fail; |
b411b363 PR |
1356 | } |
1357 | ||
1358 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1359 | drbd_md_set_sector_offsets(mdev, nbc); | |
1360 | ||
daeda1cc | 1361 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
b411b363 PR |
1362 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", |
1363 | (unsigned long long) drbd_get_max_capacity(nbc), | |
daeda1cc | 1364 | (unsigned long long) new_disk_conf->disk_size); |
67b58bf7 | 1365 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1366 | goto fail; |
b411b363 PR |
1367 | } |
1368 | ||
daeda1cc | 1369 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1370 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1371 | /* at least one MB, otherwise it does not make sense */ | |
1372 | min_md_device_sectors = (2<<10); | |
1373 | } else { | |
1374 | max_possible_sectors = DRBD_MAX_SECTORS; | |
daeda1cc | 1375 | min_md_device_sectors = MD_RESERVED_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1376 | } |
1377 | ||
b411b363 | 1378 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
67b58bf7 | 1379 | retcode = ERR_MD_DISK_TOO_SMALL; |
b411b363 PR |
1380 | dev_warn(DEV, "refusing attach: md-device too small, " |
1381 | "at least %llu sectors needed for this meta-disk type\n", | |
1382 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1383 | goto fail; |
b411b363 PR |
1384 | } |
1385 | ||
1386 | /* Make sure the new disk is big enough | |
1387 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1388 | if (drbd_get_max_capacity(nbc) < | |
1389 | drbd_get_capacity(mdev->this_bdev)) { | |
67b58bf7 | 1390 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1391 | goto fail; |
b411b363 PR |
1392 | } |
1393 | ||
1394 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1395 | ||
1352994b LE |
1396 | if (nbc->known_size > max_possible_sectors) { |
1397 | dev_warn(DEV, "==> truncating very big lower level device " | |
1398 | "to currently maximum possible %llu sectors <==\n", | |
1399 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1400 | if (new_disk_conf->meta_dev_idx >= 0) |
1352994b LE |
1401 | dev_warn(DEV, "==>> using internal or flexible " |
1402 | "meta data may help <<==\n"); | |
1403 | } | |
1404 | ||
b411b363 PR |
1405 | drbd_suspend_io(mdev); |
1406 | /* also wait for the last barrier ack. */ | |
2aebfabb | 1407 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 | 1408 | /* and for any other previously queued work */ |
a21e9298 | 1409 | drbd_flush_workqueue(mdev); |
b411b363 | 1410 | |
f2024e7c AG |
1411 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1412 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1413 | drbd_resume_io(mdev); |
f2024e7c | 1414 | if (rv < SS_SUCCESS) |
e525fd89 | 1415 | goto fail; |
b411b363 PR |
1416 | |
1417 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1418 | goto force_diskless; | |
1419 | ||
1420 | drbd_md_set_sector_offsets(mdev, nbc); | |
1421 | ||
1422 | if (!mdev->bitmap) { | |
1423 | if (drbd_bm_init(mdev)) { | |
1424 | retcode = ERR_NOMEM; | |
1425 | goto force_diskless_dec; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | retcode = drbd_md_read(mdev, nbc); | |
1430 | if (retcode != NO_ERROR) | |
1431 | goto force_diskless_dec; | |
1432 | ||
1433 | if (mdev->state.conn < C_CONNECTED && | |
1434 | mdev->state.role == R_PRIMARY && | |
1435 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1436 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1437 | (unsigned long long)mdev->ed_uuid); | |
1438 | retcode = ERR_DATA_NOT_CURRENT; | |
1439 | goto force_diskless_dec; | |
1440 | } | |
1441 | ||
1442 | /* Since we are diskless, fix the activity log first... */ | |
daeda1cc | 1443 | if (drbd_check_al_size(mdev, new_disk_conf)) { |
b411b363 PR |
1444 | retcode = ERR_NOMEM; |
1445 | goto force_diskless_dec; | |
1446 | } | |
1447 | ||
1448 | /* Prevent shrinking of consistent devices ! */ | |
1449 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
daeda1cc | 1450 | drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) { |
b411b363 | 1451 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
67b58bf7 | 1452 | retcode = ERR_DISK_TOO_SMALL; |
b411b363 PR |
1453 | goto force_diskless_dec; |
1454 | } | |
1455 | ||
1456 | if (!drbd_al_read_log(mdev, nbc)) { | |
1457 | retcode = ERR_IO_MD_DISK; | |
1458 | goto force_diskless_dec; | |
1459 | } | |
1460 | ||
b411b363 PR |
1461 | /* Reset the "barriers don't work" bits here, then force meta data to |
1462 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 1463 | if (new_disk_conf->md_flushes) |
a8a4e51e | 1464 | clear_bit(MD_NO_FUA, &mdev->flags); |
e544046a AG |
1465 | else |
1466 | set_bit(MD_NO_FUA, &mdev->flags); | |
b411b363 PR |
1467 | |
1468 | /* Point of no return reached. | |
1469 | * Devices and memory are no longer released by error cleanup below. | |
1470 | * now mdev takes over responsibility, and the state engine should | |
1471 | * clean it up somewhere. */ | |
1472 | D_ASSERT(mdev->ldev == NULL); | |
1473 | mdev->ldev = nbc; | |
1474 | mdev->resync = resync_lru; | |
9958c857 | 1475 | mdev->rs_plan_s = new_plan; |
b411b363 PR |
1476 | nbc = NULL; |
1477 | resync_lru = NULL; | |
daeda1cc | 1478 | new_disk_conf = NULL; |
9958c857 | 1479 | new_plan = NULL; |
b411b363 | 1480 | |
2451fc3b PR |
1481 | mdev->write_ordering = WO_bdev_flush; |
1482 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1483 | |
1484 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1485 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1486 | else | |
1487 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1488 | ||
894c6a94 | 1489 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
da9fbc27 | 1490 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) { |
b411b363 PR |
1491 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1492 | cp_discovered = 1; | |
1493 | } | |
1494 | ||
1495 | mdev->send_cnt = 0; | |
1496 | mdev->recv_cnt = 0; | |
1497 | mdev->read_cnt = 0; | |
1498 | mdev->writ_cnt = 0; | |
1499 | ||
99432fcc | 1500 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1501 | |
1502 | /* If I am currently not R_PRIMARY, | |
1503 | * but meta data primary indicator is set, | |
1504 | * I just now recover from a hard crash, | |
1505 | * and have been R_PRIMARY before that crash. | |
1506 | * | |
1507 | * Now, if I had no connection before that crash | |
1508 | * (have been degraded R_PRIMARY), chances are that | |
1509 | * I won't find my peer now either. | |
1510 | * | |
1511 | * In that case, and _only_ in that case, | |
1512 | * we use the degr-wfc-timeout instead of the default, | |
1513 | * so we can automatically recover from a crash of a | |
1514 | * degraded but active "cluster" after a certain timeout. | |
1515 | */ | |
1516 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1517 | if (mdev->state.role != R_PRIMARY && | |
1518 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1519 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1520 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1521 | ||
24c4830c | 1522 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1523 | if (dd == dev_size_error) { |
1524 | retcode = ERR_NOMEM_BITMAP; | |
1525 | goto force_diskless_dec; | |
1526 | } else if (dd == grew) | |
1527 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1528 | ||
1529 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1530 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1531 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1532 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1533 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1534 | retcode = ERR_IO_MD_DISK; |
1535 | goto force_diskless_dec; | |
1536 | } | |
1537 | } else { | |
20ceb2b2 | 1538 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1539 | "read from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1540 | retcode = ERR_IO_MD_DISK; |
1541 | goto force_diskless_dec; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | if (cp_discovered) { | |
1546 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1547 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1548 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1549 | retcode = ERR_IO_MD_DISK; |
1550 | goto force_diskless_dec; | |
1551 | } | |
b411b363 PR |
1552 | } |
1553 | ||
0778286a PR |
1554 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1555 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1556 | ||
87eeee41 | 1557 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1558 | os = drbd_read_state(mdev); |
1559 | ns = os; | |
b411b363 PR |
1560 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1561 | otherwise investigate MDF_WasUpToDate... | |
1562 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1563 | otherwise into D_CONSISTENT state. | |
1564 | */ | |
1565 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1566 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1567 | ns.disk = D_CONSISTENT; | |
1568 | else | |
1569 | ns.disk = D_OUTDATED; | |
1570 | } else { | |
1571 | ns.disk = D_INCONSISTENT; | |
1572 | } | |
1573 | ||
1574 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1575 | ns.pdsk = D_OUTDATED; | |
1576 | ||
daeda1cc PR |
1577 | rcu_read_lock(); |
1578 | if (ns.disk == D_CONSISTENT && | |
1579 | (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE)) | |
b411b363 | 1580 | ns.disk = D_UP_TO_DATE; |
daeda1cc | 1581 | rcu_read_unlock(); |
b411b363 PR |
1582 | |
1583 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1584 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1585 | this point, because drbd_request_state() modifies these | |
1586 | flags. */ | |
1587 | ||
1588 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1589 | state after the negotiation phase. */ | |
1590 | if (mdev->state.conn == C_CONNECTED) { | |
1591 | mdev->new_state_tmp.i = ns.i; | |
1592 | ns.i = os.i; | |
1593 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1594 | |
1595 | /* We expect to receive up-to-date UUIDs soon. | |
1596 | To avoid a race in receive_state, free p_uuid while | |
1597 | holding req_lock. I.e. atomic with the state change */ | |
1598 | kfree(mdev->p_uuid); | |
1599 | mdev->p_uuid = NULL; | |
b411b363 PR |
1600 | } |
1601 | ||
1602 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1603 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1604 | |
1605 | if (rv < SS_SUCCESS) | |
1606 | goto force_diskless_dec; | |
1607 | ||
1608 | if (mdev->state.role == R_PRIMARY) | |
1609 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1610 | else | |
1611 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1612 | ||
1613 | drbd_md_mark_dirty(mdev); | |
1614 | drbd_md_sync(mdev); | |
1615 | ||
1616 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1617 | put_ldev(mdev); | |
0e29d163 | 1618 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1619 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1620 | return 0; |
1621 | ||
1622 | force_diskless_dec: | |
1623 | put_ldev(mdev); | |
1624 | force_diskless: | |
82f59cc6 | 1625 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1626 | drbd_md_sync(mdev); |
b411b363 | 1627 | fail: |
40cbf085 | 1628 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1629 | if (nbc) { |
e525fd89 TH |
1630 | if (nbc->backing_bdev) |
1631 | blkdev_put(nbc->backing_bdev, | |
1632 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1633 | if (nbc->md_bdev) | |
1634 | blkdev_put(nbc->md_bdev, | |
1635 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1636 | kfree(nbc); |
1637 | } | |
daeda1cc | 1638 | kfree(new_disk_conf); |
b411b363 | 1639 | lc_destroy(resync_lru); |
9958c857 | 1640 | kfree(new_plan); |
b411b363 | 1641 | |
40cbf085 | 1642 | finish: |
3b98c0c2 | 1643 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1644 | return 0; |
1645 | } | |
1646 | ||
85f75dd7 LE |
1647 | static int adm_detach(struct drbd_conf *mdev) |
1648 | { | |
19f83c76 | 1649 | enum drbd_state_rv retcode; |
009ba89d | 1650 | int ret; |
85f75dd7 | 1651 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
009ba89d LE |
1652 | retcode = drbd_request_state(mdev, NS(disk, D_FAILED)); |
1653 | /* D_FAILED will transition to DISKLESS. */ | |
1654 | ret = wait_event_interruptible(mdev->misc_wait, | |
1655 | mdev->state.disk != D_FAILED); | |
85f75dd7 | 1656 | drbd_resume_io(mdev); |
009ba89d LE |
1657 | if ((int)retcode == (int)SS_IS_DISKLESS) |
1658 | retcode = SS_NOTHING_TO_DO; | |
1659 | if (ret) | |
1660 | retcode = ERR_INTR; | |
85f75dd7 LE |
1661 | return retcode; |
1662 | } | |
1663 | ||
82f59cc6 LE |
1664 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1665 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1666 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1667 | * internal references as well. | |
1668 | * Only then we have finally detached. */ | |
3b98c0c2 | 1669 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1670 | { |
9a0d9d03 | 1671 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1672 | |
1673 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1674 | if (!adm_ctx.reply_skb) | |
1675 | return retcode; | |
1676 | if (retcode != NO_ERROR) | |
1677 | goto out; | |
1678 | ||
85f75dd7 | 1679 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1680 | out: |
1681 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1682 | return 0; |
1683 | } | |
1684 | ||
f399002e LE |
1685 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1686 | { | |
1687 | struct drbd_conf *mdev; | |
695d08fa | 1688 | bool rv = false; |
f399002e LE |
1689 | int vnr; |
1690 | ||
695d08fa | 1691 | rcu_read_lock(); |
f399002e LE |
1692 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1693 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1694 | mdev->state.conn == C_SYNC_TARGET || | |
1695 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1696 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1697 | rv = true; | |
1698 | break; | |
1699 | } | |
f399002e | 1700 | } |
695d08fa PR |
1701 | rcu_read_unlock(); |
1702 | ||
1703 | return rv; | |
f399002e LE |
1704 | } |
1705 | ||
1706 | static bool conn_ov_running(struct drbd_tconn *tconn) | |
1707 | { | |
1708 | struct drbd_conf *mdev; | |
695d08fa | 1709 | bool rv = false; |
f399002e LE |
1710 | int vnr; |
1711 | ||
695d08fa | 1712 | rcu_read_lock(); |
f399002e LE |
1713 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1714 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1715 | mdev->state.conn == C_VERIFY_T) { |
1716 | rv = true; | |
1717 | break; | |
1718 | } | |
f399002e | 1719 | } |
695d08fa PR |
1720 | rcu_read_unlock(); |
1721 | ||
1722 | return rv; | |
f399002e LE |
1723 | } |
1724 | ||
cd64397c | 1725 | static enum drbd_ret_code |
44ed167d | 1726 | _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf) |
cd64397c PR |
1727 | { |
1728 | struct drbd_conf *mdev; | |
1729 | int i; | |
1730 | ||
dcb20d1a PR |
1731 | if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) { |
1732 | if (new_conf->wire_protocol != old_conf->wire_protocol) | |
1733 | return ERR_NEED_APV_100; | |
1734 | ||
1735 | if (new_conf->two_primaries != old_conf->two_primaries) | |
1736 | return ERR_NEED_APV_100; | |
1737 | ||
1738 | if (!new_conf->integrity_alg != !old_conf->integrity_alg) | |
1739 | return ERR_NEED_APV_100; | |
1740 | ||
1741 | if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg)) | |
1742 | return ERR_NEED_APV_100; | |
1743 | } | |
1744 | ||
1745 | if (!new_conf->two_primaries && | |
1746 | conn_highest_role(tconn) == R_PRIMARY && | |
1747 | conn_highest_peer(tconn) == R_PRIMARY) | |
1748 | return ERR_NEED_ALLOW_TWO_PRI; | |
b032b6fa | 1749 | |
cd64397c PR |
1750 | if (new_conf->two_primaries && |
1751 | (new_conf->wire_protocol != DRBD_PROT_C)) | |
1752 | return ERR_NOT_PROTO_C; | |
1753 | ||
cd64397c PR |
1754 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1755 | if (get_ldev(mdev)) { | |
daeda1cc | 1756 | enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing; |
cd64397c | 1757 | put_ldev(mdev); |
44ed167d | 1758 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 1759 | return ERR_STONITH_AND_PROT_A; |
cd64397c | 1760 | } |
6139f60d | 1761 | if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data) |
cd64397c | 1762 | return ERR_DISCARD; |
cd64397c | 1763 | } |
cd64397c PR |
1764 | |
1765 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) | |
1766 | return ERR_CONG_NOT_PROTO_A; | |
1767 | ||
1768 | return NO_ERROR; | |
1769 | } | |
1770 | ||
44ed167d PR |
1771 | static enum drbd_ret_code |
1772 | check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf) | |
1773 | { | |
1774 | static enum drbd_ret_code rv; | |
1775 | struct drbd_conf *mdev; | |
1776 | int i; | |
1777 | ||
1778 | rcu_read_lock(); | |
1779 | rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf); | |
1780 | rcu_read_unlock(); | |
1781 | ||
1782 | /* tconn->volumes protected by genl_lock() here */ | |
1783 | idr_for_each_entry(&tconn->volumes, mdev, i) { | |
1784 | if (!mdev->bitmap) { | |
1785 | if(drbd_bm_init(mdev)) | |
1786 | return ERR_NOMEM; | |
1787 | } | |
1788 | } | |
1789 | ||
1790 | return rv; | |
1791 | } | |
1792 | ||
0fd0ea06 PR |
1793 | struct crypto { |
1794 | struct crypto_hash *verify_tfm; | |
1795 | struct crypto_hash *csums_tfm; | |
1796 | struct crypto_hash *cram_hmac_tfm; | |
8d412fc6 | 1797 | struct crypto_hash *integrity_tfm; |
0fd0ea06 PR |
1798 | void *int_dig_in; |
1799 | void *int_dig_vv; | |
1800 | }; | |
1801 | ||
1802 | static int | |
4b6ad6d4 | 1803 | alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
1804 | { |
1805 | if (!tfm_name[0]) | |
1806 | return NO_ERROR; | |
1807 | ||
1808 | *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC); | |
1809 | if (IS_ERR(*tfm)) { | |
1810 | *tfm = NULL; | |
1811 | return err_alg; | |
1812 | } | |
1813 | ||
0fd0ea06 PR |
1814 | return NO_ERROR; |
1815 | } | |
1816 | ||
1817 | static enum drbd_ret_code | |
1818 | alloc_crypto(struct crypto *crypto, struct net_conf *new_conf) | |
1819 | { | |
1820 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
1821 | enum drbd_ret_code rv; | |
1822 | int hash_size; | |
1823 | ||
4b6ad6d4 AG |
1824 | rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg, |
1825 | ERR_CSUMS_ALG); | |
0fd0ea06 PR |
1826 | if (rv != NO_ERROR) |
1827 | return rv; | |
4b6ad6d4 AG |
1828 | rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg, |
1829 | ERR_VERIFY_ALG); | |
0fd0ea06 PR |
1830 | if (rv != NO_ERROR) |
1831 | return rv; | |
4b6ad6d4 AG |
1832 | rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg, |
1833 | ERR_INTEGRITY_ALG); | |
0fd0ea06 PR |
1834 | if (rv != NO_ERROR) |
1835 | return rv; | |
0fd0ea06 PR |
1836 | if (new_conf->cram_hmac_alg[0] != 0) { |
1837 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1838 | new_conf->cram_hmac_alg); | |
1839 | ||
4b6ad6d4 AG |
1840 | rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name, |
1841 | ERR_AUTH_ALG); | |
0fd0ea06 | 1842 | } |
8d412fc6 AG |
1843 | if (crypto->integrity_tfm) { |
1844 | hash_size = crypto_hash_digestsize(crypto->integrity_tfm); | |
0fd0ea06 PR |
1845 | crypto->int_dig_in = kmalloc(hash_size, GFP_KERNEL); |
1846 | if (!crypto->int_dig_in) | |
1847 | return ERR_NOMEM; | |
1848 | crypto->int_dig_vv = kmalloc(hash_size, GFP_KERNEL); | |
1849 | if (!crypto->int_dig_vv) | |
1850 | return ERR_NOMEM; | |
1851 | } | |
1852 | ||
1853 | return rv; | |
1854 | } | |
1855 | ||
1856 | static void free_crypto(struct crypto *crypto) | |
1857 | { | |
1858 | kfree(crypto->int_dig_in); | |
1859 | kfree(crypto->int_dig_vv); | |
1860 | crypto_free_hash(crypto->cram_hmac_tfm); | |
8d412fc6 | 1861 | crypto_free_hash(crypto->integrity_tfm); |
0fd0ea06 PR |
1862 | crypto_free_hash(crypto->csums_tfm); |
1863 | crypto_free_hash(crypto->verify_tfm); | |
1864 | } | |
1865 | ||
f399002e LE |
1866 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
1867 | { | |
1868 | enum drbd_ret_code retcode; | |
1869 | struct drbd_tconn *tconn; | |
44ed167d | 1870 | struct net_conf *old_conf, *new_conf = NULL; |
f399002e LE |
1871 | int err; |
1872 | int ovr; /* online verify running */ | |
1873 | int rsr; /* re-sync running */ | |
0fd0ea06 | 1874 | struct crypto crypto = { }; |
f399002e LE |
1875 | |
1876 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); | |
1877 | if (!adm_ctx.reply_skb) | |
1878 | return retcode; | |
1879 | if (retcode != NO_ERROR) | |
1880 | goto out; | |
1881 | ||
1882 | tconn = adm_ctx.tconn; | |
1883 | ||
1884 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); | |
1885 | if (!new_conf) { | |
1886 | retcode = ERR_NOMEM; | |
1887 | goto out; | |
1888 | } | |
1889 | ||
44ed167d PR |
1890 | conn_reconfig_start(tconn); |
1891 | ||
88104ca4 | 1892 | mutex_lock(&tconn->data.mutex); |
a0095508 | 1893 | mutex_lock(&tconn->conf_update); |
91fd4dad | 1894 | old_conf = tconn->net_conf; |
44ed167d PR |
1895 | |
1896 | if (!old_conf) { | |
f399002e LE |
1897 | drbd_msg_put_info("net conf missing, try connect"); |
1898 | retcode = ERR_INVALID_REQUEST; | |
91fd4dad | 1899 | goto fail; |
f399002e LE |
1900 | } |
1901 | ||
44ed167d | 1902 | *new_conf = *old_conf; |
5979e361 | 1903 | if (should_set_defaults(info)) |
b966b5dd | 1904 | set_net_conf_defaults(new_conf); |
f399002e | 1905 | |
f399002e | 1906 | err = net_conf_from_attrs_for_change(new_conf, info); |
c75b9b10 | 1907 | if (err && err != -ENOMSG) { |
f399002e LE |
1908 | retcode = ERR_MANDATORY_TAG; |
1909 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1910 | goto fail; | |
1911 | } | |
1912 | ||
cd64397c PR |
1913 | retcode = check_net_options(tconn, new_conf); |
1914 | if (retcode != NO_ERROR) | |
1915 | goto fail; | |
1916 | ||
f399002e LE |
1917 | /* re-sync running */ |
1918 | rsr = conn_resync_running(tconn); | |
0fd0ea06 | 1919 | if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) { |
f399002e | 1920 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 1921 | goto fail; |
f399002e LE |
1922 | } |
1923 | ||
f399002e LE |
1924 | /* online verify running */ |
1925 | ovr = conn_ov_running(tconn); | |
0fd0ea06 PR |
1926 | if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) { |
1927 | retcode = ERR_VERIFY_RUNNING; | |
1928 | goto fail; | |
f399002e LE |
1929 | } |
1930 | ||
0fd0ea06 PR |
1931 | retcode = alloc_crypto(&crypto, new_conf); |
1932 | if (retcode != NO_ERROR) | |
1933 | goto fail; | |
f399002e | 1934 | |
44ed167d | 1935 | rcu_assign_pointer(tconn->net_conf, new_conf); |
f399002e LE |
1936 | |
1937 | if (!rsr) { | |
1938 | crypto_free_hash(tconn->csums_tfm); | |
0fd0ea06 PR |
1939 | tconn->csums_tfm = crypto.csums_tfm; |
1940 | crypto.csums_tfm = NULL; | |
f399002e LE |
1941 | } |
1942 | if (!ovr) { | |
1943 | crypto_free_hash(tconn->verify_tfm); | |
0fd0ea06 PR |
1944 | tconn->verify_tfm = crypto.verify_tfm; |
1945 | crypto.verify_tfm = NULL; | |
f399002e LE |
1946 | } |
1947 | ||
0fd0ea06 PR |
1948 | kfree(tconn->int_dig_in); |
1949 | tconn->int_dig_in = crypto.int_dig_in; | |
1950 | kfree(tconn->int_dig_vv); | |
1951 | tconn->int_dig_vv = crypto.int_dig_vv; | |
8d412fc6 AG |
1952 | crypto_free_hash(tconn->integrity_tfm); |
1953 | tconn->integrity_tfm = crypto.integrity_tfm; | |
d659f2aa | 1954 | if (tconn->cstate >= C_WF_REPORT_PARAMS && tconn->agreed_pro_version >= 100) |
88104ca4 | 1955 | /* Do this without trying to take tconn->data.mutex again. */ |
d659f2aa | 1956 | __drbd_send_protocol(tconn, P_PROTOCOL_UPDATE); |
0fd0ea06 | 1957 | |
0fd0ea06 PR |
1958 | crypto_free_hash(tconn->cram_hmac_tfm); |
1959 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
1960 | ||
a0095508 | 1961 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 1962 | mutex_unlock(&tconn->data.mutex); |
91fd4dad PR |
1963 | synchronize_rcu(); |
1964 | kfree(old_conf); | |
1965 | ||
f399002e LE |
1966 | if (tconn->cstate >= C_WF_REPORT_PARAMS) |
1967 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
1968 | ||
91fd4dad PR |
1969 | goto done; |
1970 | ||
f399002e | 1971 | fail: |
a0095508 | 1972 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 1973 | mutex_unlock(&tconn->data.mutex); |
0fd0ea06 | 1974 | free_crypto(&crypto); |
f399002e | 1975 | kfree(new_conf); |
91fd4dad | 1976 | done: |
f399002e LE |
1977 | conn_reconfig_done(tconn); |
1978 | out: | |
1979 | drbd_adm_finish(info, retcode); | |
1980 | return 0; | |
1981 | } | |
1982 | ||
3b98c0c2 | 1983 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1984 | { |
3b98c0c2 | 1985 | struct drbd_conf *mdev; |
44ed167d | 1986 | struct net_conf *old_conf, *new_conf = NULL; |
0fd0ea06 | 1987 | struct crypto crypto = { }; |
80883197 | 1988 | struct drbd_tconn *oconn; |
3b98c0c2 | 1989 | struct drbd_tconn *tconn; |
b411b363 | 1990 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1991 | enum drbd_ret_code retcode; |
1992 | int i; | |
1993 | int err; | |
b411b363 | 1994 | |
3b98c0c2 LE |
1995 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1996 | if (!adm_ctx.reply_skb) | |
1997 | return retcode; | |
1998 | if (retcode != NO_ERROR) | |
1999 | goto out; | |
2000 | ||
2001 | tconn = adm_ctx.tconn; | |
80883197 | 2002 | conn_reconfig_start(tconn); |
b411b363 | 2003 | |
80883197 | 2004 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
2005 | retcode = ERR_NET_CONFIGURED; |
2006 | goto fail; | |
2007 | } | |
2008 | ||
2009 | /* allocation not in the IO path, cqueue thread context */ | |
5979e361 | 2010 | new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL); |
b411b363 PR |
2011 | if (!new_conf) { |
2012 | retcode = ERR_NOMEM; | |
2013 | goto fail; | |
2014 | } | |
2015 | ||
b966b5dd | 2016 | set_net_conf_defaults(new_conf); |
f399002e LE |
2017 | |
2018 | err = net_conf_from_attrs(new_conf, info); | |
3b98c0c2 | 2019 | if (err) { |
b411b363 | 2020 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2021 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2022 | goto fail; |
2023 | } | |
2024 | ||
cd64397c PR |
2025 | retcode = check_net_options(tconn, new_conf); |
2026 | if (retcode != NO_ERROR) | |
422028b1 | 2027 | goto fail; |
422028b1 | 2028 | |
b411b363 PR |
2029 | retcode = NO_ERROR; |
2030 | ||
2031 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
2032 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b | 2033 | |
c141ebda | 2034 | /* No need for _rcu here. All reconfiguration is |
543cc10b LE |
2035 | * strictly serialized on genl_lock(). We are protected against |
2036 | * concurrent reconfiguration/addition/deletion */ | |
80883197 | 2037 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
44ed167d | 2038 | struct net_conf *nc; |
80883197 | 2039 | if (oconn == tconn) |
b411b363 | 2040 | continue; |
44ed167d PR |
2041 | |
2042 | rcu_read_lock(); | |
2043 | nc = rcu_dereference(oconn->net_conf); | |
2044 | if (nc) { | |
2045 | taken_addr = (struct sockaddr *)&nc->my_addr; | |
2046 | if (new_conf->my_addr_len == nc->my_addr_len && | |
b411b363 PR |
2047 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
2048 | retcode = ERR_LOCAL_ADDR; | |
2049 | ||
44ed167d PR |
2050 | taken_addr = (struct sockaddr *)&nc->peer_addr; |
2051 | if (new_conf->peer_addr_len == nc->peer_addr_len && | |
b411b363 PR |
2052 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
2053 | retcode = ERR_PEER_ADDR; | |
b411b363 | 2054 | } |
44ed167d PR |
2055 | rcu_read_unlock(); |
2056 | if (retcode != NO_ERROR) | |
2057 | goto fail; | |
b411b363 PR |
2058 | } |
2059 | ||
0fd0ea06 PR |
2060 | retcode = alloc_crypto(&crypto, new_conf); |
2061 | if (retcode != NO_ERROR) | |
2062 | goto fail; | |
b411b363 | 2063 | |
b411b363 PR |
2064 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
2065 | ||
80883197 | 2066 | conn_flush_workqueue(tconn); |
91fd4dad | 2067 | |
a0095508 | 2068 | mutex_lock(&tconn->conf_update); |
91fd4dad PR |
2069 | old_conf = tconn->net_conf; |
2070 | if (old_conf) { | |
b411b363 | 2071 | retcode = ERR_NET_CONFIGURED; |
a0095508 | 2072 | mutex_unlock(&tconn->conf_update); |
b411b363 PR |
2073 | goto fail; |
2074 | } | |
44ed167d | 2075 | rcu_assign_pointer(tconn->net_conf, new_conf); |
b411b363 | 2076 | |
91fd4dad | 2077 | conn_free_crypto(tconn); |
0fd0ea06 PR |
2078 | tconn->int_dig_in = crypto.int_dig_in; |
2079 | tconn->int_dig_vv = crypto.int_dig_vv; | |
2080 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
8d412fc6 | 2081 | tconn->integrity_tfm = crypto.integrity_tfm; |
0fd0ea06 PR |
2082 | tconn->csums_tfm = crypto.csums_tfm; |
2083 | tconn->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2084 | |
a0095508 | 2085 | mutex_unlock(&tconn->conf_update); |
91fd4dad | 2086 | |
695d08fa | 2087 | rcu_read_lock(); |
80883197 PR |
2088 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2089 | mdev->send_cnt = 0; | |
2090 | mdev->recv_cnt = 0; | |
80883197 | 2091 | } |
695d08fa | 2092 | rcu_read_unlock(); |
5ee743e9 LE |
2093 | |
2094 | retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
2095 | ||
80883197 | 2096 | conn_reconfig_done(tconn); |
3b98c0c2 | 2097 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2098 | return 0; |
2099 | ||
2100 | fail: | |
0fd0ea06 | 2101 | free_crypto(&crypto); |
b411b363 PR |
2102 | kfree(new_conf); |
2103 | ||
80883197 | 2104 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2105 | out: |
2106 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2107 | return 0; |
2108 | } | |
2109 | ||
85f75dd7 LE |
2110 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2111 | { | |
2112 | enum drbd_state_rv rv; | |
85f75dd7 | 2113 | |
f3dfa40a LE |
2114 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2115 | force ? CS_HARD : 0); | |
85f75dd7 LE |
2116 | |
2117 | switch (rv) { | |
2118 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2119 | break; |
85f75dd7 LE |
2120 | case SS_ALREADY_STANDALONE: |
2121 | return SS_SUCCESS; | |
2122 | case SS_PRIMARY_NOP: | |
2123 | /* Our state checking code wants to see the peer outdated. */ | |
2124 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
f3dfa40a | 2125 | pdsk, D_OUTDATED), CS_VERBOSE); |
85f75dd7 LE |
2126 | break; |
2127 | case SS_CW_FAILED_BY_PEER: | |
2128 | /* The peer probably wants to see us outdated. */ | |
2129 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2130 | disk, D_OUTDATED), 0); | |
2131 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
f3dfa40a LE |
2132 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2133 | CS_HARD); | |
85f75dd7 LE |
2134 | } |
2135 | break; | |
2136 | default:; | |
2137 | /* no special handling necessary */ | |
2138 | } | |
2139 | ||
f3dfa40a LE |
2140 | if (rv >= SS_SUCCESS) { |
2141 | enum drbd_state_rv rv2; | |
2142 | /* No one else can reconfigure the network while I am here. | |
2143 | * The state handling only uses drbd_thread_stop_nowait(), | |
2144 | * we want to really wait here until the receiver is no more. | |
2145 | */ | |
2146 | drbd_thread_stop(&adm_ctx.tconn->receiver); | |
2147 | ||
2148 | /* Race breaker. This additional state change request may be | |
2149 | * necessary, if this was a forced disconnect during a receiver | |
2150 | * restart. We may have "killed" the receiver thread just | |
2151 | * after drbdd_init() returned. Typically, we should be | |
2152 | * C_STANDALONE already, now, and this becomes a no-op. | |
2153 | */ | |
2154 | rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE), | |
2155 | CS_VERBOSE | CS_HARD); | |
2156 | if (rv2 < SS_SUCCESS) | |
2157 | conn_err(tconn, | |
2158 | "unexpected rv2=%d in conn_try_disconnect()\n", | |
2159 | rv2); | |
2160 | } | |
85f75dd7 LE |
2161 | return rv; |
2162 | } | |
2163 | ||
3b98c0c2 | 2164 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2165 | { |
3b98c0c2 LE |
2166 | struct disconnect_parms parms; |
2167 | struct drbd_tconn *tconn; | |
85f75dd7 | 2168 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2169 | enum drbd_ret_code retcode; |
2170 | int err; | |
2561b9c1 | 2171 | |
3b98c0c2 LE |
2172 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2173 | if (!adm_ctx.reply_skb) | |
2174 | return retcode; | |
2175 | if (retcode != NO_ERROR) | |
2561b9c1 | 2176 | goto fail; |
3b98c0c2 LE |
2177 | |
2178 | tconn = adm_ctx.tconn; | |
2179 | memset(&parms, 0, sizeof(parms)); | |
2180 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2181 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2182 | if (err) { |
2183 | retcode = ERR_MANDATORY_TAG; | |
2184 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2185 | goto fail; | |
2186 | } | |
2561b9c1 PR |
2187 | } |
2188 | ||
85f75dd7 LE |
2189 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2190 | if (rv < SS_SUCCESS) | |
f3dfa40a LE |
2191 | retcode = rv; /* FIXME: Type mismatch. */ |
2192 | else | |
2193 | retcode = NO_ERROR; | |
b411b363 | 2194 | fail: |
3b98c0c2 | 2195 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2196 | return 0; |
2197 | } | |
2198 | ||
2199 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2200 | { | |
2201 | int iass; /* I am sync source */ | |
2202 | ||
2203 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2204 | if (mdev->state.role != mdev->state.peer) | |
2205 | iass = (mdev->state.role == R_PRIMARY); | |
2206 | else | |
25703f83 | 2207 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
2208 | |
2209 | if (iass) | |
2210 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2211 | else | |
2212 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2213 | } | |
2214 | ||
3b98c0c2 | 2215 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2216 | { |
daeda1cc | 2217 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 LE |
2218 | struct resize_parms rs; |
2219 | struct drbd_conf *mdev; | |
2220 | enum drbd_ret_code retcode; | |
b411b363 | 2221 | enum determine_dev_size dd; |
6495d2c6 | 2222 | enum dds_flags ddsf; |
daeda1cc | 2223 | sector_t u_size; |
3b98c0c2 | 2224 | int err; |
b411b363 | 2225 | |
3b98c0c2 LE |
2226 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2227 | if (!adm_ctx.reply_skb) | |
2228 | return retcode; | |
2229 | if (retcode != NO_ERROR) | |
b411b363 | 2230 | goto fail; |
3b98c0c2 LE |
2231 | |
2232 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2233 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2234 | err = resize_parms_from_attrs(&rs, info); |
3b98c0c2 LE |
2235 | if (err) { |
2236 | retcode = ERR_MANDATORY_TAG; | |
2237 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2238 | goto fail; | |
2239 | } | |
b411b363 PR |
2240 | } |
2241 | ||
3b98c0c2 | 2242 | mdev = adm_ctx.mdev; |
b411b363 PR |
2243 | if (mdev->state.conn > C_CONNECTED) { |
2244 | retcode = ERR_RESIZE_RESYNC; | |
2245 | goto fail; | |
2246 | } | |
2247 | ||
2248 | if (mdev->state.role == R_SECONDARY && | |
2249 | mdev->state.peer == R_SECONDARY) { | |
2250 | retcode = ERR_NO_PRIMARY; | |
2251 | goto fail; | |
2252 | } | |
2253 | ||
2254 | if (!get_ldev(mdev)) { | |
2255 | retcode = ERR_NO_DISK; | |
2256 | goto fail; | |
2257 | } | |
2258 | ||
31890f4a | 2259 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
2260 | retcode = ERR_NEED_APV_93; |
2261 | goto fail; | |
2262 | } | |
2263 | ||
daeda1cc PR |
2264 | rcu_read_lock(); |
2265 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
2266 | rcu_read_unlock(); | |
2267 | if (u_size != (sector_t)rs.resize_size) { | |
2268 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2269 | if (!new_disk_conf) { | |
2270 | retcode = ERR_NOMEM; | |
2271 | goto fail; | |
2272 | } | |
2273 | } | |
2274 | ||
087c2492 | 2275 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2276 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 | 2277 | |
daeda1cc PR |
2278 | if (new_disk_conf) { |
2279 | mutex_lock(&mdev->tconn->conf_update); | |
2280 | old_disk_conf = mdev->ldev->disk_conf; | |
2281 | *new_disk_conf = *old_disk_conf; | |
2282 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
2283 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); | |
2284 | mutex_unlock(&mdev->tconn->conf_update); | |
2285 | synchronize_rcu(); | |
2286 | kfree(old_disk_conf); | |
2287 | } | |
2288 | ||
6495d2c6 | 2289 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2290 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2291 | drbd_md_sync(mdev); |
2292 | put_ldev(mdev); | |
2293 | if (dd == dev_size_error) { | |
2294 | retcode = ERR_NOMEM_BITMAP; | |
2295 | goto fail; | |
2296 | } | |
2297 | ||
087c2492 | 2298 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2299 | if (dd == grew) |
2300 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2301 | ||
2302 | drbd_send_uuids(mdev); | |
6495d2c6 | 2303 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
2304 | } |
2305 | ||
2306 | fail: | |
3b98c0c2 | 2307 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2308 | return 0; |
2309 | } | |
2310 | ||
b966b5dd AG |
2311 | void drbd_set_res_opts_defaults(struct res_opts *r) |
2312 | { | |
2313 | return set_res_opts_defaults(r); | |
2314 | } | |
2315 | ||
f399002e | 2316 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2317 | { |
3b98c0c2 | 2318 | enum drbd_ret_code retcode; |
b411b363 | 2319 | cpumask_var_t new_cpu_mask; |
f399002e | 2320 | struct drbd_tconn *tconn; |
b57a1e27 | 2321 | struct res_opts res_opts; |
f399002e | 2322 | int err; |
b411b363 | 2323 | |
f399002e | 2324 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3b98c0c2 LE |
2325 | if (!adm_ctx.reply_skb) |
2326 | return retcode; | |
2327 | if (retcode != NO_ERROR) | |
2328 | goto fail; | |
f399002e | 2329 | tconn = adm_ctx.tconn; |
3b98c0c2 | 2330 | |
b411b363 PR |
2331 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
2332 | retcode = ERR_NOMEM; | |
3b98c0c2 | 2333 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
2334 | goto fail; |
2335 | } | |
2336 | ||
b57a1e27 | 2337 | res_opts = tconn->res_opts; |
5979e361 | 2338 | if (should_set_defaults(info)) |
b966b5dd | 2339 | set_res_opts_defaults(&res_opts); |
b411b363 | 2340 | |
b57a1e27 | 2341 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2342 | if (err && err != -ENOMSG) { |
b411b363 | 2343 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2344 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2345 | goto fail; |
2346 | } | |
2347 | ||
b411b363 | 2348 | /* silently ignore cpu mask on UP kernel */ |
b57a1e27 LE |
2349 | if (nr_cpu_ids > 1 && res_opts.cpu_mask[0] != 0) { |
2350 | err = __bitmap_parse(res_opts.cpu_mask, 32, 0, | |
b411b363 PR |
2351 | cpumask_bits(new_cpu_mask), nr_cpu_ids); |
2352 | if (err) { | |
f399002e | 2353 | conn_warn(tconn, "__bitmap_parse() failed with %d\n", err); |
b411b363 PR |
2354 | retcode = ERR_CPU_MASK_PARSE; |
2355 | goto fail; | |
2356 | } | |
2357 | } | |
2358 | ||
b411b363 | 2359 | |
b57a1e27 | 2360 | tconn->res_opts = res_opts; |
b411b363 | 2361 | |
f399002e LE |
2362 | if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) { |
2363 | cpumask_copy(tconn->cpu_mask, new_cpu_mask); | |
2364 | drbd_calc_cpu_mask(tconn); | |
2365 | tconn->receiver.reset_cpu_mask = 1; | |
2366 | tconn->asender.reset_cpu_mask = 1; | |
2367 | tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2368 | } |
2369 | ||
b411b363 PR |
2370 | fail: |
2371 | free_cpumask_var(new_cpu_mask); | |
3b98c0c2 LE |
2372 | |
2373 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2374 | return 0; |
2375 | } | |
2376 | ||
3b98c0c2 | 2377 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2378 | { |
3b98c0c2 LE |
2379 | struct drbd_conf *mdev; |
2380 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2381 | ||
2382 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2383 | if (!adm_ctx.reply_skb) | |
2384 | return retcode; | |
2385 | if (retcode != NO_ERROR) | |
2386 | goto out; | |
2387 | ||
2388 | mdev = adm_ctx.mdev; | |
b411b363 | 2389 | |
194bfb32 LE |
2390 | /* If there is still bitmap IO pending, probably because of a previous |
2391 | * resync just being finished, wait for it before requesting a new resync. */ | |
2392 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2393 | ||
b411b363 PR |
2394 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2395 | ||
2396 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2397 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2398 | ||
2399 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2400 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2401 | if (mdev->state.conn < C_CONNECTED) |
2402 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2403 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2404 | |
2405 | if (retcode != SS_NEED_CONNECTION) | |
2406 | break; | |
2407 | ||
2408 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2409 | } | |
2410 | ||
3b98c0c2 LE |
2411 | out: |
2412 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2413 | return 0; |
2414 | } | |
2415 | ||
0778286a PR |
2416 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2417 | { | |
2418 | int rv; | |
2419 | ||
2420 | rv = drbd_bmio_set_n_write(mdev); | |
2421 | drbd_suspend_al(mdev); | |
2422 | return rv; | |
2423 | } | |
2424 | ||
3b98c0c2 LE |
2425 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2426 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2427 | { |
3b98c0c2 | 2428 | enum drbd_ret_code retcode; |
194bfb32 | 2429 | |
3b98c0c2 LE |
2430 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2431 | if (!adm_ctx.reply_skb) | |
2432 | return retcode; | |
2433 | if (retcode != NO_ERROR) | |
2434 | goto out; | |
b411b363 | 2435 | |
3b98c0c2 LE |
2436 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2437 | out: | |
2438 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2439 | return 0; |
2440 | } | |
2441 | ||
3b98c0c2 | 2442 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2443 | { |
3b98c0c2 LE |
2444 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2445 | } | |
b411b363 | 2446 | |
3b98c0c2 LE |
2447 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2448 | { | |
2449 | enum drbd_ret_code retcode; | |
2450 | ||
2451 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2452 | if (!adm_ctx.reply_skb) | |
2453 | return retcode; | |
2454 | if (retcode != NO_ERROR) | |
2455 | goto out; | |
b411b363 | 2456 | |
3b98c0c2 LE |
2457 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2458 | retcode = ERR_PAUSE_IS_SET; | |
2459 | out: | |
2460 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2461 | return 0; |
2462 | } | |
2463 | ||
3b98c0c2 | 2464 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2465 | { |
da9fbc27 | 2466 | union drbd_dev_state s; |
3b98c0c2 LE |
2467 | enum drbd_ret_code retcode; |
2468 | ||
2469 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2470 | if (!adm_ctx.reply_skb) | |
2471 | return retcode; | |
2472 | if (retcode != NO_ERROR) | |
2473 | goto out; | |
b411b363 | 2474 | |
3b98c0c2 LE |
2475 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2476 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2477 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2478 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2479 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2480 | } else { | |
2481 | retcode = ERR_PAUSE_IS_CLEAR; | |
2482 | } | |
2483 | } | |
b411b363 | 2484 | |
3b98c0c2 LE |
2485 | out: |
2486 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2487 | return 0; |
2488 | } | |
2489 | ||
3b98c0c2 | 2490 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2491 | { |
3b98c0c2 | 2492 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2493 | } |
2494 | ||
3b98c0c2 | 2495 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2496 | { |
3b98c0c2 LE |
2497 | struct drbd_conf *mdev; |
2498 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2499 | ||
2500 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2501 | if (!adm_ctx.reply_skb) | |
2502 | return retcode; | |
2503 | if (retcode != NO_ERROR) | |
2504 | goto out; | |
2505 | ||
2506 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2507 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2508 | drbd_uuid_new_current(mdev); | |
2509 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2510 | } |
265be2d0 | 2511 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2512 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2513 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2514 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2515 | tl_clear(mdev->tconn); |
265be2d0 | 2516 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2517 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2518 | } |
2519 | drbd_resume_io(mdev); | |
2520 | ||
3b98c0c2 LE |
2521 | out: |
2522 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2523 | return 0; |
2524 | } | |
2525 | ||
3b98c0c2 | 2526 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2527 | { |
3b98c0c2 | 2528 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2529 | } |
2530 | ||
7c3063cc | 2531 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *resource_name, unsigned vnr) |
543cc10b LE |
2532 | { |
2533 | struct nlattr *nla; | |
2534 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2535 | if (!nla) | |
2536 | goto nla_put_failure; | |
2537 | if (vnr != VOLUME_UNSPECIFIED) | |
2538 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
7c3063cc | 2539 | NLA_PUT_STRING(skb, T_ctx_resource_name, resource_name); |
543cc10b LE |
2540 | nla_nest_end(skb, nla); |
2541 | return 0; | |
2542 | ||
2543 | nla_put_failure: | |
2544 | if (nla) | |
2545 | nla_nest_cancel(skb, nla); | |
2546 | return -EMSGSIZE; | |
2547 | } | |
2548 | ||
3b98c0c2 LE |
2549 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2550 | const struct sib_info *sib) | |
b411b363 | 2551 | { |
3b98c0c2 | 2552 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
44ed167d | 2553 | struct net_conf *nc; |
3b98c0c2 LE |
2554 | struct nlattr *nla; |
2555 | int got_ldev; | |
3b98c0c2 LE |
2556 | int err = 0; |
2557 | int exclude_sensitive; | |
2558 | ||
2559 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2560 | * to. So we better exclude_sensitive information. | |
2561 | * | |
2562 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2563 | * in the context of the requesting user process. Exclude sensitive | |
2564 | * information, unless current has superuser. | |
2565 | * | |
2566 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2567 | * relies on the current implementation of netlink_dump(), which | |
2568 | * executes the dump callback successively from netlink_recvmsg(), | |
2569 | * always in the context of the receiving process */ | |
2570 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2571 | ||
2572 | got_ldev = get_ldev(mdev); | |
3b98c0c2 LE |
2573 | |
2574 | /* We need to add connection name and volume number information still. | |
2575 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2576 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2577 | goto nla_put_failure; |
3b98c0c2 | 2578 | |
f399002e LE |
2579 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2580 | goto nla_put_failure; | |
2581 | ||
daeda1cc | 2582 | rcu_read_lock(); |
3b98c0c2 | 2583 | if (got_ldev) |
daeda1cc | 2584 | if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive)) |
3b98c0c2 | 2585 | goto nla_put_failure; |
44ed167d | 2586 | |
44ed167d PR |
2587 | nc = rcu_dereference(mdev->tconn->net_conf); |
2588 | if (nc) | |
2589 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2590 | rcu_read_unlock(); | |
2591 | if (err) | |
2592 | goto nla_put_failure; | |
3b98c0c2 | 2593 | |
3b98c0c2 LE |
2594 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2595 | if (!nla) | |
2596 | goto nla_put_failure; | |
2597 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2598 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2599 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2600 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2601 | ||
2602 | if (got_ldev) { | |
2603 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2604 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2605 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2606 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2607 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2608 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2609 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2610 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2611 | } | |
b411b363 PR |
2612 | } |
2613 | ||
3b98c0c2 LE |
2614 | if (sib) { |
2615 | switch(sib->sib_reason) { | |
2616 | case SIB_SYNC_PROGRESS: | |
2617 | case SIB_GET_STATUS_REPLY: | |
2618 | break; | |
2619 | case SIB_STATE_CHANGE: | |
2620 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2621 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2622 | break; | |
2623 | case SIB_HELPER_POST: | |
2624 | NLA_PUT_U32(skb, | |
2625 | T_helper_exit_code, sib->helper_exit_code); | |
2626 | /* fall through */ | |
2627 | case SIB_HELPER_PRE: | |
2628 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2629 | break; | |
2630 | } | |
b411b363 | 2631 | } |
3b98c0c2 | 2632 | nla_nest_end(skb, nla); |
b411b363 | 2633 | |
3b98c0c2 LE |
2634 | if (0) |
2635 | nla_put_failure: | |
2636 | err = -EMSGSIZE; | |
2637 | if (got_ldev) | |
2638 | put_ldev(mdev); | |
3b98c0c2 | 2639 | return err; |
b411b363 PR |
2640 | } |
2641 | ||
3b98c0c2 | 2642 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2643 | { |
3b98c0c2 LE |
2644 | enum drbd_ret_code retcode; |
2645 | int err; | |
b411b363 | 2646 | |
3b98c0c2 LE |
2647 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2648 | if (!adm_ctx.reply_skb) | |
2649 | return retcode; | |
2650 | if (retcode != NO_ERROR) | |
2651 | goto out; | |
b411b363 | 2652 | |
3b98c0c2 LE |
2653 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2654 | if (err) { | |
2655 | nlmsg_free(adm_ctx.reply_skb); | |
2656 | return err; | |
b411b363 | 2657 | } |
3b98c0c2 LE |
2658 | out: |
2659 | drbd_adm_finish(info, retcode); | |
2660 | return 0; | |
b411b363 PR |
2661 | } |
2662 | ||
71932efc | 2663 | int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2664 | { |
3b98c0c2 LE |
2665 | struct drbd_conf *mdev; |
2666 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2667 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2668 | struct drbd_tconn *tconn = NULL; | |
2669 | struct drbd_tconn *tmp; | |
2670 | unsigned volume = cb->args[1]; | |
2671 | ||
2672 | /* Open coded, deferred, iteration: | |
2673 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2674 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2675 | * ... | |
2676 | * } | |
2677 | * } | |
2678 | * where tconn is cb->args[0]; | |
2679 | * and i is cb->args[1]; | |
2680 | * | |
71932efc LE |
2681 | * cb->args[2] indicates if we shall loop over all resources, |
2682 | * or just dump all volumes of a single resource. | |
2683 | * | |
3b98c0c2 LE |
2684 | * This may miss entries inserted after this dump started, |
2685 | * or entries deleted before they are reached. | |
543cc10b LE |
2686 | * |
2687 | * We need to make sure the mdev won't disappear while | |
2688 | * we are looking at it, and revalidate our iterators | |
2689 | * on each iteration. | |
2690 | */ | |
3b98c0c2 | 2691 | |
9dc9fbb3 | 2692 | /* synchronize with conn_create()/conn_destroy() */ |
c141ebda | 2693 | rcu_read_lock(); |
543cc10b | 2694 | /* revalidate iterator position */ |
ec0bddbc | 2695 | list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) { |
543cc10b LE |
2696 | if (pos == NULL) { |
2697 | /* first iteration */ | |
2698 | pos = tmp; | |
2699 | tconn = pos; | |
2700 | break; | |
2701 | } | |
2702 | if (tmp == pos) { | |
2703 | tconn = pos; | |
2704 | break; | |
2705 | } | |
2706 | } | |
2707 | if (tconn) { | |
71932efc | 2708 | next_tconn: |
543cc10b LE |
2709 | mdev = idr_get_next(&tconn->volumes, &volume); |
2710 | if (!mdev) { | |
2711 | /* No more volumes to dump on this tconn. | |
2712 | * Advance tconn iterator. */ | |
ec0bddbc PR |
2713 | pos = list_entry_rcu(tconn->all_tconn.next, |
2714 | struct drbd_tconn, all_tconn); | |
71932efc | 2715 | /* Did we dump any volume on this tconn yet? */ |
543cc10b | 2716 | if (volume != 0) { |
71932efc LE |
2717 | /* If we reached the end of the list, |
2718 | * or only a single resource dump was requested, | |
2719 | * we are done. */ | |
2720 | if (&pos->all_tconn == &drbd_tconns || cb->args[2]) | |
2721 | goto out; | |
543cc10b | 2722 | volume = 0; |
71932efc | 2723 | tconn = pos; |
543cc10b LE |
2724 | goto next_tconn; |
2725 | } | |
2726 | } | |
2727 | ||
3b98c0c2 LE |
2728 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2729 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2730 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2731 | if (!dh) | |
543cc10b LE |
2732 | goto out; |
2733 | ||
2734 | if (!mdev) { | |
2735 | /* this is a tconn without a single volume */ | |
2736 | dh->minor = -1U; | |
2737 | dh->ret_code = NO_ERROR; | |
2738 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2739 | genlmsg_cancel(skb, dh); | |
2740 | else | |
2741 | genlmsg_end(skb, dh); | |
2742 | goto out; | |
2743 | } | |
3b98c0c2 | 2744 | |
543cc10b LE |
2745 | D_ASSERT(mdev->vnr == volume); |
2746 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2747 | |
543cc10b | 2748 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2749 | dh->ret_code = NO_ERROR; |
2750 | ||
2751 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2752 | genlmsg_cancel(skb, dh); | |
543cc10b | 2753 | goto out; |
3b98c0c2 LE |
2754 | } |
2755 | genlmsg_end(skb, dh); | |
2756 | } | |
b411b363 | 2757 | |
543cc10b | 2758 | out: |
c141ebda | 2759 | rcu_read_unlock(); |
543cc10b LE |
2760 | /* where to start the next iteration */ |
2761 | cb->args[0] = (long)pos; | |
2762 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2763 | |
543cc10b LE |
2764 | /* No more tconns/volumes/minors found results in an empty skb. |
2765 | * Which will terminate the dump. */ | |
3b98c0c2 | 2766 | return skb->len; |
b411b363 PR |
2767 | } |
2768 | ||
71932efc LE |
2769 | /* |
2770 | * Request status of all resources, or of all volumes within a single resource. | |
2771 | * | |
2772 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
2773 | * Which means we cannot use the family->attrbuf or other such members, because | |
2774 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
2775 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
2776 | * | |
2777 | * Once things are setup properly, we call into get_one_status(). | |
2778 | */ | |
2779 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) | |
2780 | { | |
2781 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
2782 | struct nlattr *nla; | |
7c3063cc | 2783 | const char *resource_name; |
71932efc | 2784 | struct drbd_tconn *tconn; |
7c3063cc | 2785 | int maxtype; |
71932efc LE |
2786 | |
2787 | /* Is this a followup call? */ | |
2788 | if (cb->args[0]) { | |
2789 | /* ... of a single resource dump, | |
2790 | * and the resource iterator has been advanced already? */ | |
2791 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
2792 | return 0; /* DONE. */ | |
2793 | goto dump; | |
2794 | } | |
2795 | ||
2796 | /* First call (from netlink_dump_start). We need to figure out | |
2797 | * which resource(s) the user wants us to dump. */ | |
2798 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
2799 | nlmsg_attrlen(cb->nlh, hdrlen), | |
2800 | DRBD_NLA_CFG_CONTEXT); | |
2801 | ||
2802 | /* No explicit context given. Dump all. */ | |
2803 | if (!nla) | |
2804 | goto dump; | |
7c3063cc AG |
2805 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
2806 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
2807 | if (IS_ERR(nla)) | |
2808 | return PTR_ERR(nla); | |
71932efc LE |
2809 | /* context given, but no name present? */ |
2810 | if (!nla) | |
2811 | return -EINVAL; | |
7c3063cc AG |
2812 | resource_name = nla_data(nla); |
2813 | tconn = conn_get_by_name(resource_name); | |
0ace9dfa | 2814 | |
71932efc LE |
2815 | if (!tconn) |
2816 | return -ENODEV; | |
2817 | ||
0ace9dfa PR |
2818 | kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */ |
2819 | ||
71932efc LE |
2820 | /* prime iterators, and set "filter" mode mark: |
2821 | * only dump this tconn. */ | |
2822 | cb->args[0] = (long)tconn; | |
2823 | /* cb->args[1] = 0; passed in this way. */ | |
2824 | cb->args[2] = (long)tconn; | |
2825 | ||
2826 | dump: | |
2827 | return get_one_status(skb, cb); | |
2828 | } | |
2829 | ||
3b98c0c2 | 2830 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2831 | { |
3b98c0c2 LE |
2832 | enum drbd_ret_code retcode; |
2833 | struct timeout_parms tp; | |
2834 | int err; | |
b411b363 | 2835 | |
3b98c0c2 LE |
2836 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2837 | if (!adm_ctx.reply_skb) | |
2838 | return retcode; | |
2839 | if (retcode != NO_ERROR) | |
2840 | goto out; | |
b411b363 | 2841 | |
3b98c0c2 LE |
2842 | tp.timeout_type = |
2843 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2844 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2845 | UT_DEFAULT; | |
b411b363 | 2846 | |
3b98c0c2 LE |
2847 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2848 | if (err) { | |
2849 | nlmsg_free(adm_ctx.reply_skb); | |
2850 | return err; | |
2851 | } | |
2852 | out: | |
2853 | drbd_adm_finish(info, retcode); | |
2854 | return 0; | |
b411b363 PR |
2855 | } |
2856 | ||
3b98c0c2 | 2857 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2858 | { |
3b98c0c2 LE |
2859 | struct drbd_conf *mdev; |
2860 | enum drbd_ret_code retcode; | |
b411b363 | 2861 | |
3b98c0c2 LE |
2862 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2863 | if (!adm_ctx.reply_skb) | |
2864 | return retcode; | |
2865 | if (retcode != NO_ERROR) | |
2866 | goto out; | |
873b0d5f | 2867 | |
3b98c0c2 LE |
2868 | mdev = adm_ctx.mdev; |
2869 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2870 | /* resume from last known position, if possible */ | |
2871 | struct start_ov_parms parms = | |
2872 | { .ov_start_sector = mdev->ov_start_sector }; | |
f399002e | 2873 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2874 | if (err) { |
2875 | retcode = ERR_MANDATORY_TAG; | |
2876 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2877 | goto out; | |
2878 | } | |
2879 | /* w_make_ov_request expects position to be aligned */ | |
2880 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2881 | } | |
873b0d5f LE |
2882 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2883 | * just being finished, wait for it before requesting a new resync. */ | |
2884 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2885 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2886 | out: | |
2887 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2888 | return 0; |
2889 | } | |
2890 | ||
2891 | ||
3b98c0c2 | 2892 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2893 | { |
3b98c0c2 LE |
2894 | struct drbd_conf *mdev; |
2895 | enum drbd_ret_code retcode; | |
b411b363 PR |
2896 | int skip_initial_sync = 0; |
2897 | int err; | |
3b98c0c2 | 2898 | struct new_c_uuid_parms args; |
b411b363 | 2899 | |
3b98c0c2 LE |
2900 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2901 | if (!adm_ctx.reply_skb) | |
2902 | return retcode; | |
2903 | if (retcode != NO_ERROR) | |
2904 | goto out_nolock; | |
b411b363 | 2905 | |
3b98c0c2 LE |
2906 | mdev = adm_ctx.mdev; |
2907 | memset(&args, 0, sizeof(args)); | |
2908 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 2909 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
2910 | if (err) { |
2911 | retcode = ERR_MANDATORY_TAG; | |
2912 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2913 | goto out_nolock; | |
2914 | } | |
b411b363 PR |
2915 | } |
2916 | ||
8410da8f | 2917 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2918 | |
2919 | if (!get_ldev(mdev)) { | |
2920 | retcode = ERR_NO_DISK; | |
2921 | goto out; | |
2922 | } | |
2923 | ||
2924 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2925 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2926 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2927 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2928 | skip_initial_sync = 1; | |
2929 | } else if (mdev->state.conn != C_STANDALONE) { | |
2930 | retcode = ERR_CONNECTED; | |
2931 | goto out_dec; | |
2932 | } | |
2933 | ||
2934 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2935 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2936 | ||
2937 | if (args.clear_bm) { | |
20ceb2b2 LE |
2938 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2939 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2940 | if (err) { |
2941 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2942 | retcode = ERR_IO_MD_DISK; | |
2943 | } | |
2944 | if (skip_initial_sync) { | |
2945 | drbd_send_uuids_skip_initial_sync(mdev); | |
2946 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2947 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2948 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2949 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2950 | CS_VERBOSE, NULL); | |
87eeee41 | 2951 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2952 | } |
2953 | } | |
2954 | ||
2955 | drbd_md_sync(mdev); | |
2956 | out_dec: | |
2957 | put_ldev(mdev); | |
2958 | out: | |
8410da8f | 2959 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2960 | out_nolock: |
2961 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2962 | return 0; |
2963 | } | |
2964 | ||
3b98c0c2 | 2965 | static enum drbd_ret_code |
7c3063cc | 2966 | drbd_check_resource_name(const char *name) |
774b3055 | 2967 | { |
3b98c0c2 | 2968 | if (!name || !name[0]) { |
7c3063cc | 2969 | drbd_msg_put_info("resource name missing"); |
3b98c0c2 | 2970 | return ERR_MANDATORY_TAG; |
774b3055 | 2971 | } |
3b98c0c2 LE |
2972 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2973 | * we must not allow slashes */ | |
2974 | if (strchr(name, '/')) { | |
7c3063cc | 2975 | drbd_msg_put_info("invalid resource name"); |
3b98c0c2 | 2976 | return ERR_INVALID_REQUEST; |
774b3055 | 2977 | } |
3b98c0c2 | 2978 | return NO_ERROR; |
774b3055 PR |
2979 | } |
2980 | ||
789c1b62 | 2981 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2982 | { |
3b98c0c2 | 2983 | enum drbd_ret_code retcode; |
9f5180e5 | 2984 | |
3b98c0c2 LE |
2985 | retcode = drbd_adm_prepare(skb, info, 0); |
2986 | if (!adm_ctx.reply_skb) | |
2987 | return retcode; | |
2988 | if (retcode != NO_ERROR) | |
2989 | goto out; | |
b411b363 | 2990 | |
7c3063cc | 2991 | retcode = drbd_check_resource_name(adm_ctx.resource_name); |
3b98c0c2 LE |
2992 | if (retcode != NO_ERROR) |
2993 | goto out; | |
b411b363 | 2994 | |
3b98c0c2 | 2995 | if (adm_ctx.tconn) { |
38f19616 LE |
2996 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2997 | retcode = ERR_INVALID_REQUEST; | |
789c1b62 | 2998 | drbd_msg_put_info("resource exists"); |
38f19616 LE |
2999 | } |
3000 | /* else: still NO_ERROR */ | |
3b98c0c2 | 3001 | goto out; |
b411b363 PR |
3002 | } |
3003 | ||
7c3063cc | 3004 | if (!conn_create(adm_ctx.resource_name)) |
b411b363 | 3005 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
3006 | out: |
3007 | drbd_adm_finish(info, retcode); | |
3008 | return 0; | |
b411b363 PR |
3009 | } |
3010 | ||
3b98c0c2 | 3011 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3012 | { |
3b98c0c2 LE |
3013 | struct drbd_genlmsghdr *dh = info->userhdr; |
3014 | enum drbd_ret_code retcode; | |
b411b363 | 3015 | |
3b98c0c2 LE |
3016 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3017 | if (!adm_ctx.reply_skb) | |
3018 | return retcode; | |
3019 | if (retcode != NO_ERROR) | |
3020 | goto out; | |
b411b363 | 3021 | |
3b98c0c2 LE |
3022 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
3023 | if (dh->minor >= minor_count) { | |
3024 | drbd_msg_put_info("requested minor out of range"); | |
3025 | retcode = ERR_INVALID_REQUEST; | |
3026 | goto out; | |
b411b363 | 3027 | } |
0c8e36d9 | 3028 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
3029 | drbd_msg_put_info("requested volume id out of range"); |
3030 | retcode = ERR_INVALID_REQUEST; | |
3031 | goto out; | |
b411b363 | 3032 | } |
b411b363 | 3033 | |
38f19616 LE |
3034 | /* drbd_adm_prepare made sure already |
3035 | * that mdev->tconn and mdev->vnr match the request. */ | |
3036 | if (adm_ctx.mdev) { | |
3037 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
3038 | retcode = ERR_MINOR_EXISTS; | |
3039 | /* else: still NO_ERROR */ | |
3040 | goto out; | |
3041 | } | |
3042 | ||
3b98c0c2 LE |
3043 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
3044 | out: | |
3045 | drbd_adm_finish(info, retcode); | |
3046 | return 0; | |
b411b363 PR |
3047 | } |
3048 | ||
85f75dd7 LE |
3049 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
3050 | { | |
3051 | if (mdev->state.disk == D_DISKLESS && | |
3052 | /* no need to be mdev->state.conn == C_STANDALONE && | |
3053 | * we may want to delete a minor from a live replication group. | |
3054 | */ | |
3055 | mdev->state.role == R_SECONDARY) { | |
81fa2e67 PR |
3056 | idr_remove(&mdev->tconn->volumes, mdev->vnr); |
3057 | idr_remove(&minors, mdev_to_minor(mdev)); | |
3058 | del_gendisk(mdev->vdisk); | |
3059 | synchronize_rcu(); | |
3060 | kref_put(&mdev->kref, &drbd_minor_destroy); | |
85f75dd7 LE |
3061 | return NO_ERROR; |
3062 | } else | |
3063 | return ERR_MINOR_CONFIGURED; | |
3064 | } | |
3065 | ||
3b98c0c2 | 3066 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3067 | { |
3b98c0c2 | 3068 | enum drbd_ret_code retcode; |
b411b363 | 3069 | |
3b98c0c2 LE |
3070 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
3071 | if (!adm_ctx.reply_skb) | |
3072 | return retcode; | |
3073 | if (retcode != NO_ERROR) | |
3074 | goto out; | |
b411b363 | 3075 | |
85f75dd7 | 3076 | retcode = adm_delete_minor(adm_ctx.mdev); |
85f75dd7 LE |
3077 | out: |
3078 | drbd_adm_finish(info, retcode); | |
3079 | return 0; | |
3080 | } | |
3081 | ||
3082 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
3083 | { | |
f3dfa40a | 3084 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 LE |
3085 | struct drbd_conf *mdev; |
3086 | unsigned i; | |
3087 | ||
3088 | retcode = drbd_adm_prepare(skb, info, 0); | |
3089 | if (!adm_ctx.reply_skb) | |
3090 | return retcode; | |
3091 | if (retcode != NO_ERROR) | |
3092 | goto out; | |
3093 | ||
3094 | if (!adm_ctx.tconn) { | |
789c1b62 | 3095 | retcode = ERR_RES_NOT_KNOWN; |
85f75dd7 LE |
3096 | goto out; |
3097 | } | |
3098 | ||
85f75dd7 LE |
3099 | /* demote */ |
3100 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3101 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
3102 | if (retcode < SS_SUCCESS) { | |
3103 | drbd_msg_put_info("failed to demote"); | |
c141ebda | 3104 | goto out; |
85f75dd7 LE |
3105 | } |
3106 | } | |
3107 | ||
f3dfa40a LE |
3108 | retcode = conn_try_disconnect(adm_ctx.tconn, 0); |
3109 | if (retcode < SS_SUCCESS) { | |
85f75dd7 | 3110 | drbd_msg_put_info("failed to disconnect"); |
f3dfa40a | 3111 | goto out; |
85f75dd7 LE |
3112 | } |
3113 | ||
3114 | /* detach */ | |
3115 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
f3dfa40a LE |
3116 | retcode = adm_detach(mdev); |
3117 | if (retcode < SS_SUCCESS) { | |
85f75dd7 | 3118 | drbd_msg_put_info("failed to detach"); |
c141ebda | 3119 | goto out; |
85f75dd7 LE |
3120 | } |
3121 | } | |
3122 | ||
f3dfa40a LE |
3123 | /* If we reach this, all volumes (of this tconn) are Secondary, |
3124 | * Disconnected, Diskless, aka Unconfigured. Make sure all threads have | |
c141ebda | 3125 | * actually stopped, state handling only does drbd_thread_stop_nowait(). */ |
f3dfa40a LE |
3126 | drbd_thread_stop(&adm_ctx.tconn->worker); |
3127 | ||
3128 | /* Now, nothing can fail anymore */ | |
3129 | ||
85f75dd7 LE |
3130 | /* delete volumes */ |
3131 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3132 | retcode = adm_delete_minor(mdev); | |
3133 | if (retcode != NO_ERROR) { | |
3134 | /* "can not happen" */ | |
3135 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 | 3136 | goto out; |
85f75dd7 LE |
3137 | } |
3138 | } | |
3139 | ||
85f75dd7 LE |
3140 | /* delete connection */ |
3141 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3142 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3143 | synchronize_rcu(); | |
9dc9fbb3 PR |
3144 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3145 | ||
85f75dd7 LE |
3146 | retcode = NO_ERROR; |
3147 | } else { | |
3148 | /* "can not happen" */ | |
789c1b62 | 3149 | retcode = ERR_RES_IN_USE; |
85f75dd7 | 3150 | drbd_msg_put_info("failed to delete connection"); |
85f75dd7 | 3151 | } |
ef356262 | 3152 | goto out; |
3b98c0c2 LE |
3153 | out: |
3154 | drbd_adm_finish(info, retcode); | |
3155 | return 0; | |
b411b363 PR |
3156 | } |
3157 | ||
789c1b62 | 3158 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3159 | { |
3b98c0c2 | 3160 | enum drbd_ret_code retcode; |
b411b363 | 3161 | |
3b98c0c2 LE |
3162 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3163 | if (!adm_ctx.reply_skb) | |
3164 | return retcode; | |
3165 | if (retcode != NO_ERROR) | |
3166 | goto out; | |
3167 | ||
3168 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3169 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3170 | synchronize_rcu(); | |
9dc9fbb3 PR |
3171 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3172 | ||
3b98c0c2 LE |
3173 | retcode = NO_ERROR; |
3174 | } else { | |
789c1b62 | 3175 | retcode = ERR_RES_IN_USE; |
b411b363 PR |
3176 | } |
3177 | ||
992d6e91 LE |
3178 | if (retcode == NO_ERROR) |
3179 | drbd_thread_stop(&adm_ctx.tconn->worker); | |
3b98c0c2 LE |
3180 | out: |
3181 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3182 | return 0; |
3183 | } | |
3184 | ||
3b98c0c2 | 3185 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3186 | { |
3b98c0c2 LE |
3187 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3188 | struct sk_buff *msg; | |
3189 | struct drbd_genlmsghdr *d_out; | |
3190 | unsigned seq; | |
3191 | int err = -ENOMEM; | |
3192 | ||
3193 | seq = atomic_inc_return(&drbd_genl_seq); | |
3194 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3195 | if (!msg) | |
3196 | goto failed; | |
3197 | ||
3198 | err = -EMSGSIZE; | |
3199 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3200 | if (!d_out) /* cannot happen, but anyways. */ | |
3201 | goto nla_put_failure; | |
3202 | d_out->minor = mdev_to_minor(mdev); | |
6f9b5f84 | 3203 | d_out->ret_code = NO_ERROR; |
3b98c0c2 LE |
3204 | |
3205 | if (nla_put_status_info(msg, mdev, sib)) | |
3206 | goto nla_put_failure; | |
3207 | genlmsg_end(msg, d_out); | |
3208 | err = drbd_genl_multicast_events(msg, 0); | |
3209 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3210 | if (err && err != -ESRCH) | |
3211 | goto failed; | |
b411b363 | 3212 | |
3b98c0c2 | 3213 | return; |
b411b363 | 3214 | |
3b98c0c2 LE |
3215 | nla_put_failure: |
3216 | nlmsg_free(msg); | |
3217 | failed: | |
3218 | dev_err(DEV, "Error %d while broadcasting event. " | |
3219 | "Event seq:%u sib_reason:%u\n", | |
3220 | err, seq, sib->sib_reason); | |
b411b363 | 3221 | } |
7c3063cc AG |
3222 | |
3223 | int drbd_nla_check_mandatory(int maxtype, struct nlattr *nla) | |
3224 | { | |
3225 | struct nlattr *head = nla_data(nla); | |
3226 | int len = nla_len(nla); | |
3227 | int rem; | |
3228 | ||
3229 | /* | |
3230 | * validate_nla (called from nla_parse_nested) ignores attributes | |
3231 | * beyond maxtype, and does not understand the DRBD_GENLA_F_MANDATORY flag. | |
3232 | * In order to have it validate attributes with the DRBD_GENLA_F_MANDATORY | |
3233 | * flag set also, check and remove that flag before calling | |
3234 | * nla_parse_nested. | |
3235 | */ | |
3236 | ||
3237 | nla_for_each_attr(nla, head, len, rem) { | |
3238 | if (nla->nla_type & DRBD_GENLA_F_MANDATORY) { | |
3239 | nla->nla_type &= ~DRBD_GENLA_F_MANDATORY; | |
3240 | if (nla_type(nla) > maxtype) | |
3241 | return -EOPNOTSUPP; | |
3242 | } | |
3243 | } | |
3244 | return 0; | |
3245 | } | |
3246 | ||
3247 | int drbd_nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, | |
3248 | const struct nla_policy *policy) | |
3249 | { | |
3250 | int err; | |
3251 | ||
3252 | err = drbd_nla_check_mandatory(maxtype, nla); | |
3253 | if (!err) | |
3254 | err = nla_parse_nested(tb, maxtype, nla, policy); | |
3255 | ||
3256 | return err; | |
3257 | } | |
3258 | ||
3259 | struct nlattr *drbd_nla_find_nested(int maxtype, struct nlattr *nla, int attrtype) | |
3260 | { | |
3261 | int err; | |
3262 | /* | |
3263 | * If any nested attribute has the DRBD_GENLA_F_MANDATORY flag set and | |
3264 | * we don't know about that attribute, reject all the nested | |
3265 | * attributes. | |
3266 | */ | |
3267 | err = drbd_nla_check_mandatory(maxtype, nla); | |
3268 | if (err) | |
3269 | return ERR_PTR(err); | |
3270 | return nla_find_nested(nla, attrtype); | |
3271 | } |