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Commit | Line | Data |
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b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
265be2d0 | 35 | #include "drbd_req.h" |
b411b363 PR |
36 | #include "drbd_wrappers.h" |
37 | #include <asm/unaligned.h> | |
b411b363 | 38 | #include <linux/drbd_limits.h> |
87f7be4c | 39 | #include <linux/kthread.h> |
b411b363 | 40 | |
3b98c0c2 LE |
41 | #include <net/genetlink.h> |
42 | ||
43 | /* .doit */ | |
44 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
45 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
46 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
50 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info); | |
51 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 52 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
53 | |
54 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 56 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
57 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); |
58 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 59 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
60 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); |
61 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
62 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
63 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
64 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
65 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
66 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
67 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
68 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
69 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
70 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 71 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
72 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); |
73 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
74 | /* .dumpit */ | |
75 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
76 | ||
77 | #include <linux/drbd_genl_api.h> | |
78 | #include <linux/genl_magic_func.h> | |
79 | ||
80 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
81 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
82 | ||
3b98c0c2 LE |
83 | /* Configuration is strictly serialized, because generic netlink message |
84 | * processing is strictly serialized by the genl_lock(). | |
85 | * Which means we can use one static global drbd_config_context struct. | |
86 | */ | |
87 | static struct drbd_config_context { | |
88 | /* assigned from drbd_genlmsghdr */ | |
89 | unsigned int minor; | |
90 | /* assigned from request attributes, if present */ | |
91 | unsigned int volume; | |
92 | #define VOLUME_UNSPECIFIED (-1U) | |
93 | /* pointer into the request skb, | |
94 | * limited lifetime! */ | |
95 | char *conn_name; | |
96 | ||
97 | /* reply buffer */ | |
98 | struct sk_buff *reply_skb; | |
99 | /* pointer into reply buffer */ | |
100 | struct drbd_genlmsghdr *reply_dh; | |
101 | /* resolved from attributes, if possible */ | |
102 | struct drbd_conf *mdev; | |
103 | struct drbd_tconn *tconn; | |
104 | } adm_ctx; | |
105 | ||
106 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
107 | { | |
108 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
109 | if (genlmsg_reply(skb, info)) | |
110 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 111 | } |
3b98c0c2 LE |
112 | |
113 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
114 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 115 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
116 | { |
117 | struct sk_buff *skb = adm_ctx.reply_skb; | |
118 | struct nlattr *nla; | |
119 | int err = -EMSGSIZE; | |
120 | ||
121 | if (!info || !info[0]) | |
122 | return 0; | |
123 | ||
124 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
125 | if (!nla) | |
126 | return err; | |
127 | ||
128 | err = nla_put_string(skb, T_info_text, info); | |
129 | if (err) { | |
130 | nla_nest_cancel(skb, nla); | |
131 | return err; | |
132 | } else | |
133 | nla_nest_end(skb, nla); | |
134 | return 0; | |
b411b363 PR |
135 | } |
136 | ||
3b98c0c2 LE |
137 | /* This would be a good candidate for a "pre_doit" hook, |
138 | * and per-family private info->pointers. | |
139 | * But we need to stay compatible with older kernels. | |
140 | * If it returns successfully, adm_ctx members are valid. | |
141 | */ | |
142 | #define DRBD_ADM_NEED_MINOR 1 | |
143 | #define DRBD_ADM_NEED_CONN 2 | |
144 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, | |
145 | unsigned flags) | |
146 | { | |
147 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
148 | const u8 cmd = info->genlhdr->cmd; | |
149 | int err; | |
150 | ||
151 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
152 | ||
153 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
154 | if (cmd != DRBD_ADM_GET_STATUS | |
155 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
156 | return -EPERM; | |
157 | ||
158 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
159 | if (!adm_ctx.reply_skb) | |
160 | goto fail; | |
161 | ||
162 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
163 | info, &drbd_genl_family, 0, cmd); | |
164 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
165 | * but anyways */ | |
166 | if (!adm_ctx.reply_dh) | |
167 | goto fail; | |
168 | ||
169 | adm_ctx.reply_dh->minor = d_in->minor; | |
170 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
171 | ||
172 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { | |
173 | struct nlattr *nla; | |
174 | /* parse and validate only */ | |
f399002e | 175 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
176 | if (err) |
177 | goto fail; | |
178 | ||
179 | /* It was present, and valid, | |
180 | * copy it over to the reply skb. */ | |
181 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
182 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
183 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
184 | if (err) | |
185 | goto fail; | |
186 | ||
187 | /* and assign stuff to the global adm_ctx */ | |
188 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
189 | adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; | |
190 | nla = nested_attr_tb[__nla_type(T_ctx_conn_name)]; | |
191 | if (nla) | |
192 | adm_ctx.conn_name = nla_data(nla); | |
193 | } else | |
194 | adm_ctx.volume = VOLUME_UNSPECIFIED; | |
195 | ||
196 | adm_ctx.minor = d_in->minor; | |
197 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
198 | adm_ctx.tconn = conn_by_name(adm_ctx.conn_name); | |
199 | ||
200 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
201 | drbd_msg_put_info("unknown minor"); | |
202 | return ERR_MINOR_INVALID; | |
203 | } | |
204 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { | |
205 | drbd_msg_put_info("unknown connection"); | |
206 | return ERR_INVALID_REQUEST; | |
207 | } | |
208 | ||
209 | /* some more paranoia, if the request was over-determined */ | |
527f4b24 LE |
210 | if (adm_ctx.mdev && adm_ctx.tconn && |
211 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
212 | pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", | |
213 | adm_ctx.minor, adm_ctx.conn_name, adm_ctx.mdev->tconn->name); | |
214 | drbd_msg_put_info("minor exists in different connection"); | |
215 | return ERR_INVALID_REQUEST; | |
216 | } | |
3b98c0c2 LE |
217 | if (adm_ctx.mdev && |
218 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
219 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
220 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
221 | adm_ctx.minor, adm_ctx.volume, | |
222 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 223 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
224 | return ERR_INVALID_REQUEST; |
225 | } | |
cffec5b2 LE |
226 | if (adm_ctx.mdev && !adm_ctx.tconn) |
227 | adm_ctx.tconn = adm_ctx.mdev->tconn; | |
3b98c0c2 LE |
228 | return NO_ERROR; |
229 | ||
230 | fail: | |
231 | nlmsg_free(adm_ctx.reply_skb); | |
232 | adm_ctx.reply_skb = NULL; | |
233 | return -ENOMEM; | |
234 | } | |
235 | ||
236 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
237 | { | |
238 | struct nlattr *nla; | |
239 | const char *conn_name = NULL; | |
240 | ||
241 | if (!adm_ctx.reply_skb) | |
242 | return -ENOMEM; | |
243 | ||
244 | adm_ctx.reply_dh->ret_code = retcode; | |
245 | ||
246 | nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; | |
247 | if (nla) { | |
248 | nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); | |
249 | if (nla) | |
250 | conn_name = nla_data(nla); | |
251 | } | |
252 | ||
253 | drbd_adm_send_reply(adm_ctx.reply_skb, info); | |
254 | return 0; | |
255 | } | |
b411b363 | 256 | |
6b75dced | 257 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 258 | { |
6b75dced | 259 | char *afs; |
b411b363 | 260 | |
6b75dced PR |
261 | if (get_net_conf(tconn)) { |
262 | switch (((struct sockaddr *)tconn->net_conf->peer_addr)->sa_family) { | |
b411b363 PR |
263 | case AF_INET6: |
264 | afs = "ipv6"; | |
6b75dced PR |
265 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
266 | &((struct sockaddr_in6 *)tconn->net_conf->peer_addr)->sin6_addr); | |
b411b363 PR |
267 | break; |
268 | case AF_INET: | |
269 | afs = "ipv4"; | |
6b75dced PR |
270 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
271 | &((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr); | |
b411b363 PR |
272 | break; |
273 | default: | |
274 | afs = "ssocks"; | |
6b75dced PR |
275 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
276 | &((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr); | |
b411b363 | 277 | } |
6b75dced PR |
278 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
279 | put_net_conf(tconn); | |
b411b363 | 280 | } |
6b75dced PR |
281 | } |
282 | ||
283 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
284 | { | |
285 | char *envp[] = { "HOME=/", | |
286 | "TERM=linux", | |
287 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
288 | (char[20]) { }, /* address family */ | |
289 | (char[60]) { }, /* address */ | |
290 | NULL }; | |
291 | char mb[12]; | |
292 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
293 | struct sib_info sib; | |
294 | int ret; | |
295 | ||
296 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
297 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 298 | |
1090c056 LE |
299 | /* The helper may take some time. |
300 | * write out any unsynced meta data changes now */ | |
301 | drbd_md_sync(mdev); | |
302 | ||
b411b363 | 303 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
304 | sib.sib_reason = SIB_HELPER_PRE; |
305 | sib.helper_name = cmd; | |
306 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
307 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
308 | if (ret) | |
309 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
310 | usermode_helper, cmd, mb, | |
311 | (ret >> 8) & 0xff, ret); | |
312 | else | |
313 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
314 | usermode_helper, cmd, mb, | |
315 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
316 | sib.sib_reason = SIB_HELPER_POST; |
317 | sib.helper_exit_code = ret; | |
318 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
319 | |
320 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
321 | ret = 0; | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
6b75dced PR |
326 | static void conn_md_sync(struct drbd_tconn *tconn) |
327 | { | |
328 | struct drbd_conf *mdev; | |
e90285e0 | 329 | int vnr; |
6b75dced | 330 | |
d3fcb490 | 331 | down_read(&drbd_cfg_rwsem); |
e90285e0 | 332 | idr_for_each_entry(&tconn->volumes, mdev, vnr) |
6b75dced | 333 | drbd_md_sync(mdev); |
d3fcb490 | 334 | up_read(&drbd_cfg_rwsem); |
6b75dced PR |
335 | } |
336 | ||
337 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
338 | { | |
339 | char *envp[] = { "HOME=/", | |
340 | "TERM=linux", | |
341 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
342 | (char[20]) { }, /* address family */ | |
343 | (char[60]) { }, /* address */ | |
344 | NULL }; | |
345 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
346 | int ret; | |
347 | ||
348 | setup_khelper_env(tconn, envp); | |
349 | conn_md_sync(tconn); | |
350 | ||
351 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
352 | /* TODO: conn_bcast_event() ?? */ | |
353 | ||
354 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
355 | if (ret) | |
356 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
357 | usermode_helper, cmd, tconn->name, | |
358 | (ret >> 8) & 0xff, ret); | |
359 | else | |
360 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
361 | usermode_helper, cmd, tconn->name, | |
362 | (ret >> 8) & 0xff, ret); | |
363 | /* TODO: conn_bcast_event() ?? */ | |
364 | ||
365 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
366 | ret = 0; | |
367 | ||
368 | return ret; | |
369 | } | |
370 | ||
cb703454 | 371 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 372 | { |
cb703454 PR |
373 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
374 | struct drbd_conf *mdev; | |
375 | int vnr; | |
376 | ||
695d08fa | 377 | rcu_read_lock(); |
cb703454 PR |
378 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
379 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
380 | fp = max_t(enum drbd_fencing_p, fp, mdev->ldev->dc.fencing); | |
381 | put_ldev(mdev); | |
382 | } | |
383 | } | |
695d08fa | 384 | rcu_read_unlock(); |
cb703454 PR |
385 | |
386 | return fp; | |
387 | } | |
388 | ||
389 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
390 | { | |
391 | union drbd_state mask = { }; | |
392 | union drbd_state val = { }; | |
393 | enum drbd_fencing_p fp; | |
b411b363 PR |
394 | char *ex_to_string; |
395 | int r; | |
b411b363 | 396 | |
cb703454 PR |
397 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
398 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
399 | return false; | |
400 | } | |
b411b363 | 401 | |
cb703454 PR |
402 | fp = highest_fencing_policy(tconn); |
403 | switch (fp) { | |
404 | case FP_NOT_AVAIL: | |
405 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 406 | goto out; |
cb703454 PR |
407 | case FP_DONT_CARE: |
408 | return true; | |
409 | default: ; | |
b411b363 PR |
410 | } |
411 | ||
cb703454 | 412 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
413 | |
414 | switch ((r>>8) & 0xff) { | |
415 | case 3: /* peer is inconsistent */ | |
416 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
417 | mask.pdsk = D_MASK; |
418 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
419 | break; |
420 | case 4: /* peer got outdated, or was already outdated */ | |
421 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
422 | mask.pdsk = D_MASK; |
423 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
424 | break; |
425 | case 5: /* peer was down */ | |
cb703454 | 426 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
427 | /* we will(have) create(d) a new UUID anyways... */ |
428 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
429 | mask.pdsk = D_MASK; |
430 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
431 | } else { |
432 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
433 | } |
434 | break; | |
435 | case 6: /* Peer is primary, voluntarily outdate myself. | |
436 | * This is useful when an unconnected R_SECONDARY is asked to | |
437 | * become R_PRIMARY, but finds the other peer being active. */ | |
438 | ex_to_string = "peer is active"; | |
cb703454 PR |
439 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
440 | mask.disk = D_MASK; | |
441 | val.disk = D_OUTDATED; | |
b411b363 PR |
442 | break; |
443 | case 7: | |
444 | if (fp != FP_STONITH) | |
cb703454 | 445 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 446 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
447 | mask.pdsk = D_MASK; |
448 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
449 | break; |
450 | default: | |
451 | /* The script is broken ... */ | |
cb703454 PR |
452 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
453 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
454 | } |
455 | ||
cb703454 PR |
456 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
457 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 458 | |
cb703454 | 459 | out: |
fb22c402 | 460 | |
cb703454 PR |
461 | /* Not using |
462 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
463 | here, because we might were able to re-establish the connection in the | |
464 | meantime. */ | |
465 | spin_lock_irq(&tconn->req_lock); | |
466 | if (tconn->cstate < C_WF_REPORT_PARAMS) | |
467 | _conn_request_state(tconn, mask, val, CS_VERBOSE); | |
468 | spin_unlock_irq(&tconn->req_lock); | |
469 | ||
470 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
471 | } |
472 | ||
87f7be4c PR |
473 | static int _try_outdate_peer_async(void *data) |
474 | { | |
cb703454 | 475 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 476 | |
cb703454 | 477 | conn_try_outdate_peer(tconn); |
87f7be4c PR |
478 | |
479 | return 0; | |
480 | } | |
481 | ||
cb703454 | 482 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
483 | { |
484 | struct task_struct *opa; | |
485 | ||
cb703454 | 486 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
87f7be4c | 487 | if (IS_ERR(opa)) |
cb703454 | 488 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
87f7be4c | 489 | } |
b411b363 | 490 | |
bf885f8a AG |
491 | enum drbd_state_rv |
492 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
493 | { |
494 | const int max_tries = 4; | |
bf885f8a | 495 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
b411b363 PR |
496 | int try = 0; |
497 | int forced = 0; | |
498 | union drbd_state mask, val; | |
b411b363 PR |
499 | |
500 | if (new_role == R_PRIMARY) | |
0625ac19 | 501 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 502 | |
8410da8f | 503 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
504 | |
505 | mask.i = 0; mask.role = R_MASK; | |
506 | val.i = 0; val.role = new_role; | |
507 | ||
508 | while (try++ < max_tries) { | |
bf885f8a | 509 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
510 | |
511 | /* in case we first succeeded to outdate, | |
512 | * but now suddenly could establish a connection */ | |
bf885f8a | 513 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
514 | val.pdsk = 0; |
515 | mask.pdsk = 0; | |
516 | continue; | |
517 | } | |
518 | ||
bf885f8a | 519 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
520 | (mdev->state.disk < D_UP_TO_DATE && |
521 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
522 | mask.disk = D_MASK; |
523 | val.disk = D_UP_TO_DATE; | |
524 | forced = 1; | |
525 | continue; | |
526 | } | |
527 | ||
bf885f8a | 528 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
529 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
530 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 531 | |
cb703454 | 532 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
533 | val.disk = D_UP_TO_DATE; |
534 | mask.disk = D_MASK; | |
535 | } | |
b411b363 PR |
536 | continue; |
537 | } | |
538 | ||
bf885f8a | 539 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 540 | goto out; |
bf885f8a | 541 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 542 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 543 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
544 | mask.pdsk = D_MASK; |
545 | val.pdsk = D_OUTDATED; | |
b411b363 | 546 | |
cb703454 | 547 | } |
b411b363 PR |
548 | continue; |
549 | } | |
bf885f8a | 550 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
551 | /* Maybe the peer is detected as dead very soon... |
552 | retry at most once more in this case. */ | |
89e58e75 | 553 | schedule_timeout_interruptible((mdev->tconn->net_conf->ping_timeo+1)*HZ/10); |
b411b363 PR |
554 | if (try < max_tries) |
555 | try = max_tries - 1; | |
556 | continue; | |
557 | } | |
bf885f8a AG |
558 | if (rv < SS_SUCCESS) { |
559 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 560 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 561 | if (rv < SS_SUCCESS) |
3b98c0c2 | 562 | goto out; |
b411b363 PR |
563 | } |
564 | break; | |
565 | } | |
566 | ||
bf885f8a | 567 | if (rv < SS_SUCCESS) |
3b98c0c2 | 568 | goto out; |
b411b363 PR |
569 | |
570 | if (forced) | |
571 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
572 | ||
573 | /* Wait until nothing is on the fly :) */ | |
574 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
575 | ||
576 | if (new_role == R_SECONDARY) { | |
81e84650 | 577 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
578 | if (get_ldev(mdev)) { |
579 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
580 | put_ldev(mdev); | |
581 | } | |
582 | } else { | |
b2fb6dbe | 583 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 584 | mdev->tconn->net_conf->want_lose = 0; |
b2fb6dbe | 585 | put_net_conf(mdev->tconn); |
b411b363 | 586 | } |
81e84650 | 587 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
588 | if (get_ldev(mdev)) { |
589 | if (((mdev->state.conn < C_CONNECTED || | |
590 | mdev->state.pdsk <= D_FAILED) | |
591 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
592 | drbd_uuid_new_current(mdev); | |
593 | ||
594 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
595 | put_ldev(mdev); | |
596 | } | |
597 | } | |
598 | ||
19f843aa LE |
599 | /* writeout of activity log covered areas of the bitmap |
600 | * to stable storage done in after state change already */ | |
b411b363 PR |
601 | |
602 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
603 | /* if this was forced, we should consider sync */ | |
604 | if (forced) | |
605 | drbd_send_uuids(mdev); | |
606 | drbd_send_state(mdev); | |
607 | } | |
608 | ||
609 | drbd_md_sync(mdev); | |
610 | ||
611 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 612 | out: |
8410da8f | 613 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 614 | return rv; |
b411b363 PR |
615 | } |
616 | ||
3b98c0c2 | 617 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 618 | { |
3b98c0c2 LE |
619 | return err == -ENOMSG ? "required attribute missing" : |
620 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 621 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 622 | "invalid attribute value"; |
b411b363 PR |
623 | } |
624 | ||
3b98c0c2 | 625 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 626 | { |
3b98c0c2 LE |
627 | struct set_role_parms parms; |
628 | int err; | |
629 | enum drbd_ret_code retcode; | |
b411b363 | 630 | |
3b98c0c2 LE |
631 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
632 | if (!adm_ctx.reply_skb) | |
633 | return retcode; | |
634 | if (retcode != NO_ERROR) | |
635 | goto out; | |
636 | ||
637 | memset(&parms, 0, sizeof(parms)); | |
638 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 639 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
640 | if (err) { |
641 | retcode = ERR_MANDATORY_TAG; | |
642 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
643 | goto out; | |
644 | } | |
645 | } | |
646 | ||
647 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
648 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
649 | else | |
650 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
651 | out: | |
652 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
653 | return 0; |
654 | } | |
655 | ||
656 | /* initializes the md.*_offset members, so we are able to find | |
657 | * the on disk meta data */ | |
658 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
659 | struct drbd_backing_dev *bdev) | |
660 | { | |
661 | sector_t md_size_sect = 0; | |
662 | switch (bdev->dc.meta_dev_idx) { | |
663 | default: | |
664 | /* v07 style fixed size indexed meta data */ | |
665 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
666 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
667 | bdev->md.al_offset = MD_AL_OFFSET; | |
668 | bdev->md.bm_offset = MD_BM_OFFSET; | |
669 | break; | |
670 | case DRBD_MD_INDEX_FLEX_EXT: | |
671 | /* just occupy the full device; unit: sectors */ | |
672 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
673 | bdev->md.md_offset = 0; | |
674 | bdev->md.al_offset = MD_AL_OFFSET; | |
675 | bdev->md.bm_offset = MD_BM_OFFSET; | |
676 | break; | |
677 | case DRBD_MD_INDEX_INTERNAL: | |
678 | case DRBD_MD_INDEX_FLEX_INT: | |
679 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
680 | /* al size is still fixed */ | |
7ad651b5 | 681 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
682 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
683 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
684 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
685 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
686 | md_size_sect = ALIGN(md_size_sect, 8); | |
687 | ||
688 | /* plus the "drbd meta data super block", | |
689 | * and the activity log; */ | |
690 | md_size_sect += MD_BM_OFFSET; | |
691 | ||
692 | bdev->md.md_size_sect = md_size_sect; | |
693 | /* bitmap offset is adjusted by 'super' block size */ | |
694 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
695 | break; | |
696 | } | |
697 | } | |
698 | ||
4b0715f0 | 699 | /* input size is expected to be in KB */ |
b411b363 PR |
700 | char *ppsize(char *buf, unsigned long long size) |
701 | { | |
4b0715f0 LE |
702 | /* Needs 9 bytes at max including trailing NUL: |
703 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
704 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
705 | int base = 0; | |
4b0715f0 | 706 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
707 | /* shift + round */ |
708 | size = (size >> 10) + !!(size & (1<<9)); | |
709 | base++; | |
710 | } | |
4b0715f0 | 711 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
712 | |
713 | return buf; | |
714 | } | |
715 | ||
716 | /* there is still a theoretical deadlock when called from receiver | |
717 | * on an D_INCONSISTENT R_PRIMARY: | |
718 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
719 | * packet from remote to dec_ap_bio again. | |
720 | * receiver receive_sizes(), comes here, | |
721 | * waits for ap_bio_cnt == 0. -> deadlock. | |
722 | * but this cannot happen, actually, because: | |
723 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
724 | * (not connected, or bad/no disk on peer): | |
725 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
726 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
727 | * peer may not initiate a resize. | |
728 | */ | |
3b98c0c2 LE |
729 | /* Note these are not to be confused with |
730 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
731 | * which are (sub) state changes triggered by admin (drbdsetup), | |
732 | * and can be long lived. | |
733 | * This changes an mdev->flag, is triggered by drbd internals, | |
734 | * and should be short-lived. */ | |
b411b363 PR |
735 | void drbd_suspend_io(struct drbd_conf *mdev) |
736 | { | |
737 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 738 | if (drbd_suspended(mdev)) |
265be2d0 | 739 | return; |
b411b363 PR |
740 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
741 | } | |
742 | ||
743 | void drbd_resume_io(struct drbd_conf *mdev) | |
744 | { | |
745 | clear_bit(SUSPEND_IO, &mdev->flags); | |
746 | wake_up(&mdev->misc_wait); | |
747 | } | |
748 | ||
749 | /** | |
750 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
751 | * @mdev: DRBD device. | |
752 | * | |
753 | * Returns 0 on success, negative return values indicate errors. | |
754 | * You should call drbd_md_sync() after calling this function. | |
755 | */ | |
24c4830c | 756 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
757 | { |
758 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
759 | sector_t la_size; | |
760 | sector_t size; | |
761 | char ppb[10]; | |
762 | ||
763 | int md_moved, la_size_changed; | |
764 | enum determine_dev_size rv = unchanged; | |
765 | ||
766 | /* race: | |
767 | * application request passes inc_ap_bio, | |
768 | * but then cannot get an AL-reference. | |
769 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
770 | * | |
771 | * to avoid that: | |
772 | * Suspend IO right here. | |
773 | * still lock the act_log to not trigger ASSERTs there. | |
774 | */ | |
775 | drbd_suspend_io(mdev); | |
776 | ||
777 | /* no wait necessary anymore, actually we could assert that */ | |
778 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
779 | ||
780 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
781 | prev_size = mdev->ldev->md.md_size_sect; | |
782 | la_size = mdev->ldev->md.la_size_sect; | |
783 | ||
784 | /* TODO: should only be some assert here, not (re)init... */ | |
785 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
786 | ||
d845030f | 787 | size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED); |
b411b363 PR |
788 | |
789 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
790 | drbd_bm_capacity(mdev) != size) { | |
791 | int err; | |
02d9a94b | 792 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
793 | if (unlikely(err)) { |
794 | /* currently there is only one error: ENOMEM! */ | |
795 | size = drbd_bm_capacity(mdev)>>1; | |
796 | if (size == 0) { | |
797 | dev_err(DEV, "OUT OF MEMORY! " | |
798 | "Could not allocate bitmap!\n"); | |
799 | } else { | |
800 | dev_err(DEV, "BM resizing failed. " | |
801 | "Leaving size unchanged at size = %lu KB\n", | |
802 | (unsigned long)size); | |
803 | } | |
804 | rv = dev_size_error; | |
805 | } | |
806 | /* racy, see comments above. */ | |
807 | drbd_set_my_capacity(mdev, size); | |
808 | mdev->ldev->md.la_size_sect = size; | |
809 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
810 | (unsigned long long)size>>1); | |
811 | } | |
812 | if (rv == dev_size_error) | |
813 | goto out; | |
814 | ||
815 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
816 | ||
817 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
818 | || prev_size != mdev->ldev->md.md_size_sect; | |
819 | ||
820 | if (la_size_changed || md_moved) { | |
24dccabb AG |
821 | int err; |
822 | ||
b411b363 PR |
823 | drbd_al_shrink(mdev); /* All extents inactive. */ |
824 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
825 | la_size_changed && md_moved ? "size changed and md moved" : | |
826 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
827 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
828 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
829 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
830 | if (err) { |
831 | rv = dev_size_error; | |
832 | goto out; | |
833 | } | |
b411b363 PR |
834 | drbd_md_mark_dirty(mdev); |
835 | } | |
836 | ||
837 | if (size > la_size) | |
838 | rv = grew; | |
839 | if (size < la_size) | |
840 | rv = shrunk; | |
841 | out: | |
842 | lc_unlock(mdev->act_log); | |
843 | wake_up(&mdev->al_wait); | |
844 | drbd_resume_io(mdev); | |
845 | ||
846 | return rv; | |
847 | } | |
848 | ||
849 | sector_t | |
a393db6f | 850 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space) |
b411b363 PR |
851 | { |
852 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
853 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
854 | sector_t m_size; /* my size */ | |
855 | sector_t u_size = bdev->dc.disk_size; /* size requested by user. */ | |
856 | sector_t size = 0; | |
857 | ||
858 | m_size = drbd_get_max_capacity(bdev); | |
859 | ||
a393db6f PR |
860 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
861 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
862 | p_size = m_size; | |
863 | } | |
864 | ||
b411b363 PR |
865 | if (p_size && m_size) { |
866 | size = min_t(sector_t, p_size, m_size); | |
867 | } else { | |
868 | if (la_size) { | |
869 | size = la_size; | |
870 | if (m_size && m_size < size) | |
871 | size = m_size; | |
872 | if (p_size && p_size < size) | |
873 | size = p_size; | |
874 | } else { | |
875 | if (m_size) | |
876 | size = m_size; | |
877 | if (p_size) | |
878 | size = p_size; | |
879 | } | |
880 | } | |
881 | ||
882 | if (size == 0) | |
883 | dev_err(DEV, "Both nodes diskless!\n"); | |
884 | ||
885 | if (u_size) { | |
886 | if (u_size > size) | |
887 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
888 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
889 | else | |
890 | size = u_size; | |
891 | } | |
892 | ||
893 | return size; | |
894 | } | |
895 | ||
896 | /** | |
897 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
898 | * @mdev: DRBD device. | |
899 | * | |
900 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
901 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
902 | * this function. | |
903 | */ | |
f399002e | 904 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
905 | { |
906 | struct lru_cache *n, *t; | |
907 | struct lc_element *e; | |
908 | unsigned int in_use; | |
909 | int i; | |
910 | ||
f399002e LE |
911 | if (!expect(dc->al_extents >= DRBD_AL_EXTENTS_MIN)) |
912 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
b411b363 PR |
913 | |
914 | if (mdev->act_log && | |
f399002e | 915 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
916 | return 0; |
917 | ||
918 | in_use = 0; | |
919 | t = mdev->act_log; | |
7ad651b5 | 920 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 921 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
922 | |
923 | if (n == NULL) { | |
924 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
925 | return -ENOMEM; | |
926 | } | |
927 | spin_lock_irq(&mdev->al_lock); | |
928 | if (t) { | |
929 | for (i = 0; i < t->nr_elements; i++) { | |
930 | e = lc_element_by_index(t, i); | |
931 | if (e->refcnt) | |
932 | dev_err(DEV, "refcnt(%d)==%d\n", | |
933 | e->lc_number, e->refcnt); | |
934 | in_use += e->refcnt; | |
935 | } | |
936 | } | |
937 | if (!in_use) | |
938 | mdev->act_log = n; | |
939 | spin_unlock_irq(&mdev->al_lock); | |
940 | if (in_use) { | |
941 | dev_err(DEV, "Activity log still in use!\n"); | |
942 | lc_destroy(n); | |
943 | return -EBUSY; | |
944 | } else { | |
945 | if (t) | |
946 | lc_destroy(t); | |
947 | } | |
948 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
949 | return 0; | |
950 | } | |
951 | ||
99432fcc | 952 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
953 | { |
954 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
955 | int max_hw_sectors = max_bio_size >> 9; |
956 | int max_segments = 0; | |
957 | ||
958 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
959 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
960 | ||
961 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
962 | max_segments = mdev->ldev->dc.max_bio_bvecs; | |
963 | put_ldev(mdev); | |
964 | } | |
b411b363 | 965 | |
b411b363 | 966 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
967 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
968 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
969 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
970 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 971 | |
99432fcc PR |
972 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
973 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
974 | ||
975 | blk_queue_stack_limits(q, b); | |
976 | ||
977 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
978 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
979 | q->backing_dev_info.ra_pages, | |
980 | b->backing_dev_info.ra_pages); | |
981 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
982 | } | |
983 | put_ldev(mdev); | |
984 | } | |
985 | } | |
986 | ||
987 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
988 | { | |
989 | int now, new, local, peer; | |
990 | ||
991 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
992 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
993 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 994 | |
99432fcc PR |
995 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
996 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
997 | mdev->local_max_bio_size = local; | |
998 | put_ldev(mdev); | |
b411b363 | 999 | } |
99432fcc PR |
1000 | |
1001 | /* We may ignore peer limits if the peer is modern enough. | |
1002 | Because new from 8.3.8 onwards the peer can use multiple | |
1003 | BIOs for a single peer_request */ | |
1004 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1005 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 1006 | peer = mdev->peer_max_bio_size; |
31890f4a | 1007 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
1008 | peer = DRBD_MAX_SIZE_H80_PACKET; |
1009 | else /* drbd 8.3.8 onwards */ | |
1010 | peer = DRBD_MAX_BIO_SIZE; | |
1011 | } | |
1012 | ||
1013 | new = min_t(int, local, peer); | |
1014 | ||
1015 | if (mdev->state.role == R_PRIMARY && new < now) | |
1016 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1017 | ||
1018 | if (new != now) | |
1019 | dev_info(DEV, "max BIO size = %u\n", new); | |
1020 | ||
1021 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1022 | } |
1023 | ||
1024 | /* serialize deconfig (worker exiting, doing cleanup) | |
1025 | * and reconfig (drbdsetup disk, drbdsetup net) | |
1026 | * | |
c518d04f LE |
1027 | * Wait for a potentially exiting worker, then restart it, |
1028 | * or start a new one. Flush any pending work, there may still be an | |
1029 | * after_state_change queued. | |
b411b363 | 1030 | */ |
0e29d163 | 1031 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1032 | { |
0e29d163 PR |
1033 | wait_event(tconn->ping_wait, !test_and_set_bit(CONFIG_PENDING, &tconn->flags)); |
1034 | wait_event(tconn->ping_wait, !test_bit(OBJECT_DYING, &tconn->flags)); | |
1035 | drbd_thread_start(&tconn->worker); | |
1036 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1037 | } |
1038 | ||
1039 | /* if still unconfigured, stops worker again. | |
1040 | * if configured now, clears CONFIG_PENDING. | |
1041 | * wakes potential waiters */ | |
0e29d163 | 1042 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1043 | { |
0e29d163 PR |
1044 | spin_lock_irq(&tconn->req_lock); |
1045 | if (conn_all_vols_unconf(tconn)) { | |
1046 | set_bit(OBJECT_DYING, &tconn->flags); | |
1047 | drbd_thread_stop_nowait(&tconn->worker); | |
b411b363 | 1048 | } else |
0e29d163 PR |
1049 | clear_bit(CONFIG_PENDING, &tconn->flags); |
1050 | spin_unlock_irq(&tconn->req_lock); | |
1051 | wake_up(&tconn->ping_wait); | |
b411b363 PR |
1052 | } |
1053 | ||
0778286a PR |
1054 | /* Make sure IO is suspended before calling this function(). */ |
1055 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1056 | { | |
1057 | int s = 0; | |
1058 | ||
61610420 | 1059 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1060 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1061 | return; | |
1062 | } | |
1063 | ||
61610420 | 1064 | drbd_al_shrink(mdev); |
87eeee41 | 1065 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1066 | if (mdev->state.conn < C_CONNECTED) |
1067 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1068 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1069 | lc_unlock(mdev->act_log); |
0778286a PR |
1070 | |
1071 | if (s) | |
1072 | dev_info(DEV, "Suspended AL updates\n"); | |
1073 | } | |
1074 | ||
f399002e LE |
1075 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1076 | { | |
1077 | enum drbd_ret_code retcode; | |
1078 | struct drbd_conf *mdev; | |
1079 | struct disk_conf *ndc; /* new disk conf */ | |
1080 | int err, fifo_size; | |
1081 | int *rs_plan_s = NULL; | |
1082 | ||
1083 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1084 | if (!adm_ctx.reply_skb) | |
1085 | return retcode; | |
1086 | if (retcode != NO_ERROR) | |
1087 | goto out; | |
1088 | ||
1089 | mdev = adm_ctx.mdev; | |
1090 | ||
1091 | /* we also need a disk | |
1092 | * to change the options on */ | |
1093 | if (!get_ldev(mdev)) { | |
1094 | retcode = ERR_NO_DISK; | |
1095 | goto out; | |
1096 | } | |
1097 | ||
1098 | /* FIXME freeze IO, cluster wide. | |
1099 | * | |
1100 | * We should make sure no-one uses | |
1101 | * some half-updated struct when we | |
1102 | * assign it later. */ | |
1103 | ||
1104 | ndc = kmalloc(sizeof(*ndc), GFP_KERNEL); | |
1105 | if (!ndc) { | |
1106 | retcode = ERR_NOMEM; | |
1107 | goto fail; | |
1108 | } | |
1109 | ||
1110 | memcpy(ndc, &mdev->ldev->dc, sizeof(*ndc)); | |
1111 | err = disk_conf_from_attrs_for_change(ndc, info); | |
1112 | if (err) { | |
1113 | retcode = ERR_MANDATORY_TAG; | |
1114 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1115 | } | |
1116 | ||
1117 | if (!expect(ndc->resync_rate >= 1)) | |
1118 | ndc->resync_rate = 1; | |
1119 | ||
1120 | /* clip to allowed range */ | |
1121 | if (!expect(ndc->al_extents >= DRBD_AL_EXTENTS_MIN)) | |
1122 | ndc->al_extents = DRBD_AL_EXTENTS_MIN; | |
1123 | if (!expect(ndc->al_extents <= DRBD_AL_EXTENTS_MAX)) | |
1124 | ndc->al_extents = DRBD_AL_EXTENTS_MAX; | |
1125 | ||
1126 | /* most sanity checks done, try to assign the new sync-after | |
1127 | * dependency. need to hold the global lock in there, | |
1128 | * to avoid a race in the dependency loop check. */ | |
1129 | retcode = drbd_alter_sa(mdev, ndc->resync_after); | |
1130 | if (retcode != NO_ERROR) | |
1131 | goto fail; | |
1132 | ||
1133 | fifo_size = (ndc->c_plan_ahead * 10 * SLEEP_TIME) / HZ; | |
1134 | if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) { | |
1135 | rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL); | |
1136 | if (!rs_plan_s) { | |
1137 | dev_err(DEV, "kmalloc of fifo_buffer failed"); | |
1138 | retcode = ERR_NOMEM; | |
1139 | goto fail; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | if (fifo_size != mdev->rs_plan_s.size) { | |
1144 | kfree(mdev->rs_plan_s.values); | |
1145 | mdev->rs_plan_s.values = rs_plan_s; | |
1146 | mdev->rs_plan_s.size = fifo_size; | |
1147 | mdev->rs_planed = 0; | |
1148 | rs_plan_s = NULL; | |
1149 | } | |
1150 | ||
1151 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
1152 | drbd_al_shrink(mdev); | |
1153 | err = drbd_check_al_size(mdev, ndc); | |
1154 | lc_unlock(mdev->act_log); | |
1155 | wake_up(&mdev->al_wait); | |
1156 | ||
1157 | if (err) { | |
1158 | retcode = ERR_NOMEM; | |
1159 | goto fail; | |
1160 | } | |
1161 | ||
1162 | /* FIXME | |
1163 | * To avoid someone looking at a half-updated struct, we probably | |
1164 | * should have a rw-semaphor on net_conf and disk_conf. | |
1165 | */ | |
1166 | mdev->ldev->dc = *ndc; | |
1167 | ||
1168 | drbd_md_sync(mdev); | |
1169 | ||
1170 | ||
1171 | if (mdev->state.conn >= C_CONNECTED) | |
1172 | drbd_send_sync_param(mdev); | |
1173 | ||
1174 | fail: | |
1175 | put_ldev(mdev); | |
1176 | kfree(ndc); | |
1177 | kfree(rs_plan_s); | |
1178 | out: | |
1179 | drbd_adm_finish(info, retcode); | |
1180 | return 0; | |
1181 | } | |
1182 | ||
3b98c0c2 | 1183 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1184 | { |
3b98c0c2 LE |
1185 | struct drbd_conf *mdev; |
1186 | int err; | |
116676ca | 1187 | enum drbd_ret_code retcode; |
b411b363 PR |
1188 | enum determine_dev_size dd; |
1189 | sector_t max_possible_sectors; | |
1190 | sector_t min_md_device_sectors; | |
1191 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
e525fd89 | 1192 | struct block_device *bdev; |
b411b363 PR |
1193 | struct lru_cache *resync_lru = NULL; |
1194 | union drbd_state ns, os; | |
f2024e7c | 1195 | enum drbd_state_rv rv; |
b411b363 | 1196 | int cp_discovered = 0; |
b411b363 | 1197 | |
3b98c0c2 LE |
1198 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1199 | if (!adm_ctx.reply_skb) | |
1200 | return retcode; | |
1201 | if (retcode != NO_ERROR) | |
40cbf085 | 1202 | goto finish; |
3b98c0c2 LE |
1203 | |
1204 | mdev = adm_ctx.mdev; | |
0e29d163 | 1205 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1206 | |
1207 | /* if you want to reconfigure, please tear down first */ | |
1208 | if (mdev->state.disk > D_DISKLESS) { | |
1209 | retcode = ERR_DISK_CONFIGURED; | |
1210 | goto fail; | |
1211 | } | |
82f59cc6 LE |
1212 | /* It may just now have detached because of IO error. Make sure |
1213 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1214 | * e.g. if someone calls attach from the on-io-error handler, | |
1215 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1216 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1217 | |
3b98c0c2 | 1218 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1219 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1220 | if (!nbc) { | |
1221 | retcode = ERR_NOMEM; | |
1222 | goto fail; | |
1223 | } | |
1224 | ||
f399002e LE |
1225 | nbc->dc = (struct disk_conf) { |
1226 | {}, 0, /* backing_dev */ | |
1227 | {}, 0, /* meta_dev */ | |
1228 | 0, /* meta_dev_idx */ | |
1229 | DRBD_DISK_SIZE_SECT_DEF, /* disk_size */ | |
1230 | DRBD_MAX_BIO_BVECS_DEF, /* max_bio_bvecs */ | |
1231 | DRBD_ON_IO_ERROR_DEF, /* on_io_error */ | |
1232 | DRBD_FENCING_DEF, /* fencing */ | |
1233 | DRBD_RATE_DEF, /* resync_rate */ | |
1234 | DRBD_AFTER_DEF, /* resync_after */ | |
1235 | DRBD_AL_EXTENTS_DEF, /* al_extents */ | |
1236 | DRBD_C_PLAN_AHEAD_DEF, /* c_plan_ahead */ | |
1237 | DRBD_C_DELAY_TARGET_DEF, /* c_delay_target */ | |
1238 | DRBD_C_FILL_TARGET_DEF, /* c_fill_target */ | |
1239 | DRBD_C_MAX_RATE_DEF, /* c_max_rate */ | |
1240 | DRBD_C_MIN_RATE_DEF, /* c_min_rate */ | |
1241 | 0, /* no_disk_barrier */ | |
1242 | 0, /* no_disk_flush */ | |
1243 | 0, /* no_disk_drain */ | |
1244 | 0, /* no_md_flush */ | |
1245 | }; | |
1246 | ||
1247 | err = disk_conf_from_attrs(&nbc->dc, info); | |
3b98c0c2 | 1248 | if (err) { |
b411b363 | 1249 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1250 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1251 | goto fail; |
1252 | } | |
1253 | ||
3b98c0c2 | 1254 | if ((int)nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1255 | retcode = ERR_MD_IDX_INVALID; |
1256 | goto fail; | |
1257 | } | |
1258 | ||
b2fb6dbe | 1259 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 1260 | int prot = mdev->tconn->net_conf->wire_protocol; |
b2fb6dbe | 1261 | put_net_conf(mdev->tconn); |
47ff2d0a PR |
1262 | if (nbc->dc.fencing == FP_STONITH && prot == DRBD_PROT_A) { |
1263 | retcode = ERR_STONITH_AND_PROT_A; | |
1264 | goto fail; | |
1265 | } | |
1266 | } | |
1267 | ||
d4d77629 TH |
1268 | bdev = blkdev_get_by_path(nbc->dc.backing_dev, |
1269 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); | |
e525fd89 | 1270 | if (IS_ERR(bdev)) { |
b411b363 | 1271 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev, |
e525fd89 | 1272 | PTR_ERR(bdev)); |
b411b363 PR |
1273 | retcode = ERR_OPEN_DISK; |
1274 | goto fail; | |
1275 | } | |
e525fd89 TH |
1276 | nbc->backing_bdev = bdev; |
1277 | ||
1278 | /* | |
1279 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1280 | * drbd sharing one meta device. TODO in that case, paranoia | |
1281 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1282 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1283 | * should check it for you already; but if you don't, or | |
1284 | * someone fooled it, we need to double check here) | |
1285 | */ | |
d4d77629 TH |
1286 | bdev = blkdev_get_by_path(nbc->dc.meta_dev, |
1287 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
3b98c0c2 | 1288 | ((int)nbc->dc.meta_dev_idx < 0) ? |
d4d77629 | 1289 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1290 | if (IS_ERR(bdev)) { |
b411b363 | 1291 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev, |
e525fd89 | 1292 | PTR_ERR(bdev)); |
b411b363 PR |
1293 | retcode = ERR_OPEN_MD_DISK; |
1294 | goto fail; | |
1295 | } | |
e525fd89 | 1296 | nbc->md_bdev = bdev; |
b411b363 | 1297 | |
e525fd89 TH |
1298 | if ((nbc->backing_bdev == nbc->md_bdev) != |
1299 | (nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL || | |
1300 | nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
1301 | retcode = ERR_MD_IDX_INVALID; | |
b411b363 PR |
1302 | goto fail; |
1303 | } | |
1304 | ||
1305 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1306 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1307 | offsetof(struct bm_extent, lce)); |
1308 | if (!resync_lru) { | |
1309 | retcode = ERR_NOMEM; | |
e525fd89 | 1310 | goto fail; |
b411b363 PR |
1311 | } |
1312 | ||
1313 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1314 | drbd_md_set_sector_offsets(mdev, nbc); | |
1315 | ||
1316 | if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) { | |
1317 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", | |
1318 | (unsigned long long) drbd_get_max_capacity(nbc), | |
1319 | (unsigned long long) nbc->dc.disk_size); | |
1320 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1321 | goto fail; |
b411b363 PR |
1322 | } |
1323 | ||
3b98c0c2 | 1324 | if ((int)nbc->dc.meta_dev_idx < 0) { |
b411b363 PR |
1325 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1326 | /* at least one MB, otherwise it does not make sense */ | |
1327 | min_md_device_sectors = (2<<10); | |
1328 | } else { | |
1329 | max_possible_sectors = DRBD_MAX_SECTORS; | |
1330 | min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1); | |
1331 | } | |
1332 | ||
b411b363 PR |
1333 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
1334 | retcode = ERR_MD_DISK_TO_SMALL; | |
1335 | dev_warn(DEV, "refusing attach: md-device too small, " | |
1336 | "at least %llu sectors needed for this meta-disk type\n", | |
1337 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1338 | goto fail; |
b411b363 PR |
1339 | } |
1340 | ||
1341 | /* Make sure the new disk is big enough | |
1342 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1343 | if (drbd_get_max_capacity(nbc) < | |
1344 | drbd_get_capacity(mdev->this_bdev)) { | |
1345 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1346 | goto fail; |
b411b363 PR |
1347 | } |
1348 | ||
1349 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1350 | ||
1352994b LE |
1351 | if (nbc->known_size > max_possible_sectors) { |
1352 | dev_warn(DEV, "==> truncating very big lower level device " | |
1353 | "to currently maximum possible %llu sectors <==\n", | |
1354 | (unsigned long long) max_possible_sectors); | |
3b98c0c2 | 1355 | if ((int)nbc->dc.meta_dev_idx >= 0) |
1352994b LE |
1356 | dev_warn(DEV, "==>> using internal or flexible " |
1357 | "meta data may help <<==\n"); | |
1358 | } | |
1359 | ||
b411b363 PR |
1360 | drbd_suspend_io(mdev); |
1361 | /* also wait for the last barrier ack. */ | |
2aebfabb | 1362 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 | 1363 | /* and for any other previously queued work */ |
a21e9298 | 1364 | drbd_flush_workqueue(mdev); |
b411b363 | 1365 | |
f2024e7c AG |
1366 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1367 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1368 | drbd_resume_io(mdev); |
f2024e7c | 1369 | if (rv < SS_SUCCESS) |
e525fd89 | 1370 | goto fail; |
b411b363 PR |
1371 | |
1372 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1373 | goto force_diskless; | |
1374 | ||
1375 | drbd_md_set_sector_offsets(mdev, nbc); | |
1376 | ||
1377 | if (!mdev->bitmap) { | |
1378 | if (drbd_bm_init(mdev)) { | |
1379 | retcode = ERR_NOMEM; | |
1380 | goto force_diskless_dec; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | retcode = drbd_md_read(mdev, nbc); | |
1385 | if (retcode != NO_ERROR) | |
1386 | goto force_diskless_dec; | |
1387 | ||
1388 | if (mdev->state.conn < C_CONNECTED && | |
1389 | mdev->state.role == R_PRIMARY && | |
1390 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1391 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1392 | (unsigned long long)mdev->ed_uuid); | |
1393 | retcode = ERR_DATA_NOT_CURRENT; | |
1394 | goto force_diskless_dec; | |
1395 | } | |
1396 | ||
1397 | /* Since we are diskless, fix the activity log first... */ | |
f399002e | 1398 | if (drbd_check_al_size(mdev, &nbc->dc)) { |
b411b363 PR |
1399 | retcode = ERR_NOMEM; |
1400 | goto force_diskless_dec; | |
1401 | } | |
1402 | ||
1403 | /* Prevent shrinking of consistent devices ! */ | |
1404 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
a393db6f | 1405 | drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) { |
b411b363 PR |
1406 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
1407 | retcode = ERR_DISK_TO_SMALL; | |
1408 | goto force_diskless_dec; | |
1409 | } | |
1410 | ||
1411 | if (!drbd_al_read_log(mdev, nbc)) { | |
1412 | retcode = ERR_IO_MD_DISK; | |
1413 | goto force_diskless_dec; | |
1414 | } | |
1415 | ||
b411b363 PR |
1416 | /* Reset the "barriers don't work" bits here, then force meta data to |
1417 | * be written, to ensure we determine if barriers are supported. */ | |
1418 | if (nbc->dc.no_md_flush) | |
a8a4e51e | 1419 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1420 | else |
a8a4e51e | 1421 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1422 | |
1423 | /* Point of no return reached. | |
1424 | * Devices and memory are no longer released by error cleanup below. | |
1425 | * now mdev takes over responsibility, and the state engine should | |
1426 | * clean it up somewhere. */ | |
1427 | D_ASSERT(mdev->ldev == NULL); | |
1428 | mdev->ldev = nbc; | |
1429 | mdev->resync = resync_lru; | |
1430 | nbc = NULL; | |
1431 | resync_lru = NULL; | |
1432 | ||
2451fc3b PR |
1433 | mdev->write_ordering = WO_bdev_flush; |
1434 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1435 | |
1436 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1437 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1438 | else | |
1439 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1440 | ||
894c6a94 | 1441 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
da9fbc27 | 1442 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) { |
b411b363 PR |
1443 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1444 | cp_discovered = 1; | |
1445 | } | |
1446 | ||
1447 | mdev->send_cnt = 0; | |
1448 | mdev->recv_cnt = 0; | |
1449 | mdev->read_cnt = 0; | |
1450 | mdev->writ_cnt = 0; | |
1451 | ||
99432fcc | 1452 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1453 | |
1454 | /* If I am currently not R_PRIMARY, | |
1455 | * but meta data primary indicator is set, | |
1456 | * I just now recover from a hard crash, | |
1457 | * and have been R_PRIMARY before that crash. | |
1458 | * | |
1459 | * Now, if I had no connection before that crash | |
1460 | * (have been degraded R_PRIMARY), chances are that | |
1461 | * I won't find my peer now either. | |
1462 | * | |
1463 | * In that case, and _only_ in that case, | |
1464 | * we use the degr-wfc-timeout instead of the default, | |
1465 | * so we can automatically recover from a crash of a | |
1466 | * degraded but active "cluster" after a certain timeout. | |
1467 | */ | |
1468 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1469 | if (mdev->state.role != R_PRIMARY && | |
1470 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1471 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1472 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1473 | ||
24c4830c | 1474 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1475 | if (dd == dev_size_error) { |
1476 | retcode = ERR_NOMEM_BITMAP; | |
1477 | goto force_diskless_dec; | |
1478 | } else if (dd == grew) | |
1479 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1480 | ||
1481 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1482 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1483 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1484 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1485 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1486 | retcode = ERR_IO_MD_DISK; |
1487 | goto force_diskless_dec; | |
1488 | } | |
1489 | } else { | |
20ceb2b2 | 1490 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1491 | "read from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1492 | retcode = ERR_IO_MD_DISK; |
1493 | goto force_diskless_dec; | |
1494 | } | |
1495 | } | |
1496 | ||
1497 | if (cp_discovered) { | |
1498 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1499 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1500 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1501 | retcode = ERR_IO_MD_DISK; |
1502 | goto force_diskless_dec; | |
1503 | } | |
b411b363 PR |
1504 | } |
1505 | ||
0778286a PR |
1506 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1507 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1508 | ||
87eeee41 | 1509 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1510 | os = drbd_read_state(mdev); |
1511 | ns = os; | |
b411b363 PR |
1512 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1513 | otherwise investigate MDF_WasUpToDate... | |
1514 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1515 | otherwise into D_CONSISTENT state. | |
1516 | */ | |
1517 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1518 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1519 | ns.disk = D_CONSISTENT; | |
1520 | else | |
1521 | ns.disk = D_OUTDATED; | |
1522 | } else { | |
1523 | ns.disk = D_INCONSISTENT; | |
1524 | } | |
1525 | ||
1526 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1527 | ns.pdsk = D_OUTDATED; | |
1528 | ||
1529 | if ( ns.disk == D_CONSISTENT && | |
1530 | (ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE)) | |
1531 | ns.disk = D_UP_TO_DATE; | |
1532 | ||
1533 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1534 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1535 | this point, because drbd_request_state() modifies these | |
1536 | flags. */ | |
1537 | ||
1538 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1539 | state after the negotiation phase. */ | |
1540 | if (mdev->state.conn == C_CONNECTED) { | |
1541 | mdev->new_state_tmp.i = ns.i; | |
1542 | ns.i = os.i; | |
1543 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1544 | |
1545 | /* We expect to receive up-to-date UUIDs soon. | |
1546 | To avoid a race in receive_state, free p_uuid while | |
1547 | holding req_lock. I.e. atomic with the state change */ | |
1548 | kfree(mdev->p_uuid); | |
1549 | mdev->p_uuid = NULL; | |
b411b363 PR |
1550 | } |
1551 | ||
1552 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1553 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1554 | |
1555 | if (rv < SS_SUCCESS) | |
1556 | goto force_diskless_dec; | |
1557 | ||
1558 | if (mdev->state.role == R_PRIMARY) | |
1559 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1560 | else | |
1561 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1562 | ||
1563 | drbd_md_mark_dirty(mdev); | |
1564 | drbd_md_sync(mdev); | |
1565 | ||
1566 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1567 | put_ldev(mdev); | |
0e29d163 | 1568 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1569 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1570 | return 0; |
1571 | ||
1572 | force_diskless_dec: | |
1573 | put_ldev(mdev); | |
1574 | force_diskless: | |
82f59cc6 | 1575 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1576 | drbd_md_sync(mdev); |
b411b363 | 1577 | fail: |
40cbf085 | 1578 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1579 | if (nbc) { |
e525fd89 TH |
1580 | if (nbc->backing_bdev) |
1581 | blkdev_put(nbc->backing_bdev, | |
1582 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1583 | if (nbc->md_bdev) | |
1584 | blkdev_put(nbc->md_bdev, | |
1585 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1586 | kfree(nbc); |
1587 | } | |
1588 | lc_destroy(resync_lru); | |
1589 | ||
40cbf085 | 1590 | finish: |
3b98c0c2 | 1591 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1592 | return 0; |
1593 | } | |
1594 | ||
85f75dd7 LE |
1595 | static int adm_detach(struct drbd_conf *mdev) |
1596 | { | |
19f83c76 | 1597 | enum drbd_state_rv retcode; |
85f75dd7 LE |
1598 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
1599 | retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS)); | |
1600 | wait_event(mdev->misc_wait, | |
1601 | mdev->state.disk != D_DISKLESS || | |
1602 | !atomic_read(&mdev->local_cnt)); | |
1603 | drbd_resume_io(mdev); | |
1604 | return retcode; | |
1605 | } | |
1606 | ||
82f59cc6 LE |
1607 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1608 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1609 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1610 | * internal references as well. | |
1611 | * Only then we have finally detached. */ | |
3b98c0c2 | 1612 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1613 | { |
9a0d9d03 | 1614 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1615 | |
1616 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1617 | if (!adm_ctx.reply_skb) | |
1618 | return retcode; | |
1619 | if (retcode != NO_ERROR) | |
1620 | goto out; | |
1621 | ||
85f75dd7 | 1622 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1623 | out: |
1624 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1625 | return 0; |
1626 | } | |
1627 | ||
f399002e LE |
1628 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1629 | { | |
1630 | struct drbd_conf *mdev; | |
695d08fa | 1631 | bool rv = false; |
f399002e LE |
1632 | int vnr; |
1633 | ||
695d08fa | 1634 | rcu_read_lock(); |
f399002e LE |
1635 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1636 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1637 | mdev->state.conn == C_SYNC_TARGET || | |
1638 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1639 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1640 | rv = true; | |
1641 | break; | |
1642 | } | |
f399002e | 1643 | } |
695d08fa PR |
1644 | rcu_read_unlock(); |
1645 | ||
1646 | return rv; | |
f399002e LE |
1647 | } |
1648 | ||
1649 | static bool conn_ov_running(struct drbd_tconn *tconn) | |
1650 | { | |
1651 | struct drbd_conf *mdev; | |
695d08fa | 1652 | bool rv = false; |
f399002e LE |
1653 | int vnr; |
1654 | ||
695d08fa | 1655 | rcu_read_lock(); |
f399002e LE |
1656 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1657 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1658 | mdev->state.conn == C_VERIFY_T) { |
1659 | rv = true; | |
1660 | break; | |
1661 | } | |
f399002e | 1662 | } |
695d08fa PR |
1663 | rcu_read_unlock(); |
1664 | ||
1665 | return rv; | |
f399002e LE |
1666 | } |
1667 | ||
1668 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) | |
1669 | { | |
1670 | enum drbd_ret_code retcode; | |
1671 | struct drbd_tconn *tconn; | |
1672 | struct net_conf *new_conf = NULL; | |
1673 | int err; | |
1674 | int ovr; /* online verify running */ | |
1675 | int rsr; /* re-sync running */ | |
1676 | struct crypto_hash *verify_tfm = NULL; | |
1677 | struct crypto_hash *csums_tfm = NULL; | |
1678 | ||
1679 | ||
1680 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); | |
1681 | if (!adm_ctx.reply_skb) | |
1682 | return retcode; | |
1683 | if (retcode != NO_ERROR) | |
1684 | goto out; | |
1685 | ||
1686 | tconn = adm_ctx.tconn; | |
1687 | ||
1688 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); | |
1689 | if (!new_conf) { | |
1690 | retcode = ERR_NOMEM; | |
1691 | goto out; | |
1692 | } | |
1693 | ||
1694 | /* we also need a net config | |
1695 | * to change the options on */ | |
1696 | if (!get_net_conf(tconn)) { | |
1697 | drbd_msg_put_info("net conf missing, try connect"); | |
1698 | retcode = ERR_INVALID_REQUEST; | |
1699 | goto out; | |
1700 | } | |
1701 | ||
1702 | conn_reconfig_start(tconn); | |
1703 | ||
1704 | memcpy(new_conf, tconn->net_conf, sizeof(*new_conf)); | |
1705 | err = net_conf_from_attrs_for_change(new_conf, info); | |
1706 | if (err) { | |
1707 | retcode = ERR_MANDATORY_TAG; | |
1708 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1709 | goto fail; | |
1710 | } | |
1711 | ||
1712 | /* re-sync running */ | |
1713 | rsr = conn_resync_running(tconn); | |
1714 | if (rsr && strcmp(new_conf->csums_alg, tconn->net_conf->csums_alg)) { | |
1715 | retcode = ERR_CSUMS_RESYNC_RUNNING; | |
1716 | goto fail; | |
1717 | } | |
1718 | ||
1719 | if (!rsr && new_conf->csums_alg[0]) { | |
1720 | csums_tfm = crypto_alloc_hash(new_conf->csums_alg, 0, CRYPTO_ALG_ASYNC); | |
1721 | if (IS_ERR(csums_tfm)) { | |
1722 | csums_tfm = NULL; | |
1723 | retcode = ERR_CSUMS_ALG; | |
1724 | goto fail; | |
1725 | } | |
1726 | ||
1727 | if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) { | |
1728 | retcode = ERR_CSUMS_ALG_ND; | |
1729 | goto fail; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | /* online verify running */ | |
1734 | ovr = conn_ov_running(tconn); | |
1735 | if (ovr) { | |
1736 | if (strcmp(new_conf->verify_alg, tconn->net_conf->verify_alg)) { | |
1737 | retcode = ERR_VERIFY_RUNNING; | |
1738 | goto fail; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | if (!ovr && new_conf->verify_alg[0]) { | |
1743 | verify_tfm = crypto_alloc_hash(new_conf->verify_alg, 0, CRYPTO_ALG_ASYNC); | |
1744 | if (IS_ERR(verify_tfm)) { | |
1745 | verify_tfm = NULL; | |
1746 | retcode = ERR_VERIFY_ALG; | |
1747 | goto fail; | |
1748 | } | |
1749 | ||
1750 | if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) { | |
1751 | retcode = ERR_VERIFY_ALG_ND; | |
1752 | goto fail; | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | ||
1757 | /* For now, use struct assignment, not pointer assignment. | |
1758 | * We don't have any means to determine who might still | |
1759 | * keep a local alias into the struct, | |
1760 | * so we cannot just free it and hope for the best :( | |
1761 | * FIXME | |
1762 | * To avoid someone looking at a half-updated struct, we probably | |
1763 | * should have a rw-semaphor on net_conf and disk_conf. | |
1764 | */ | |
1765 | *tconn->net_conf = *new_conf; | |
1766 | ||
1767 | if (!rsr) { | |
1768 | crypto_free_hash(tconn->csums_tfm); | |
1769 | tconn->csums_tfm = csums_tfm; | |
1770 | csums_tfm = NULL; | |
1771 | } | |
1772 | if (!ovr) { | |
1773 | crypto_free_hash(tconn->verify_tfm); | |
1774 | tconn->verify_tfm = verify_tfm; | |
1775 | verify_tfm = NULL; | |
1776 | } | |
1777 | ||
1778 | if (tconn->cstate >= C_WF_REPORT_PARAMS) | |
1779 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
1780 | ||
1781 | fail: | |
1782 | crypto_free_hash(csums_tfm); | |
1783 | crypto_free_hash(verify_tfm); | |
1784 | kfree(new_conf); | |
1785 | put_net_conf(tconn); | |
1786 | conn_reconfig_done(tconn); | |
1787 | out: | |
1788 | drbd_adm_finish(info, retcode); | |
1789 | return 0; | |
1790 | } | |
1791 | ||
3b98c0c2 | 1792 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1793 | { |
3b98c0c2 LE |
1794 | char hmac_name[CRYPTO_MAX_ALG_NAME]; |
1795 | struct drbd_conf *mdev; | |
b411b363 PR |
1796 | struct net_conf *new_conf = NULL; |
1797 | struct crypto_hash *tfm = NULL; | |
1798 | struct crypto_hash *integrity_w_tfm = NULL; | |
1799 | struct crypto_hash *integrity_r_tfm = NULL; | |
b411b363 PR |
1800 | void *int_dig_in = NULL; |
1801 | void *int_dig_vv = NULL; | |
80883197 | 1802 | struct drbd_tconn *oconn; |
3b98c0c2 | 1803 | struct drbd_tconn *tconn; |
b411b363 | 1804 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1805 | enum drbd_ret_code retcode; |
1806 | int i; | |
1807 | int err; | |
b411b363 | 1808 | |
3b98c0c2 LE |
1809 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1810 | if (!adm_ctx.reply_skb) | |
1811 | return retcode; | |
1812 | if (retcode != NO_ERROR) | |
1813 | goto out; | |
1814 | ||
1815 | tconn = adm_ctx.tconn; | |
80883197 | 1816 | conn_reconfig_start(tconn); |
b411b363 | 1817 | |
80883197 | 1818 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
1819 | retcode = ERR_NET_CONFIGURED; |
1820 | goto fail; | |
1821 | } | |
1822 | ||
1823 | /* allocation not in the IO path, cqueue thread context */ | |
f399002e | 1824 | new_conf = kmalloc(sizeof(struct net_conf), GFP_KERNEL); |
b411b363 PR |
1825 | if (!new_conf) { |
1826 | retcode = ERR_NOMEM; | |
1827 | goto fail; | |
1828 | } | |
1829 | ||
f399002e LE |
1830 | *new_conf = (struct net_conf) { |
1831 | {}, 0, /* my_addr */ | |
1832 | {}, 0, /* peer_addr */ | |
1833 | {}, 0, /* shared_secret */ | |
1834 | {}, 0, /* cram_hmac_alg */ | |
1835 | {}, 0, /* integrity_alg */ | |
1836 | {}, 0, /* verify_alg */ | |
1837 | {}, 0, /* csums_alg */ | |
1838 | DRBD_PROTOCOL_DEF, /* wire_protocol */ | |
1839 | DRBD_CONNECT_INT_DEF, /* try_connect_int */ | |
1840 | DRBD_TIMEOUT_DEF, /* timeout */ | |
1841 | DRBD_PING_INT_DEF, /* ping_int */ | |
1842 | DRBD_PING_TIMEO_DEF, /* ping_timeo */ | |
1843 | DRBD_SNDBUF_SIZE_DEF, /* sndbuf_size */ | |
1844 | DRBD_RCVBUF_SIZE_DEF, /* rcvbuf_size */ | |
1845 | DRBD_KO_COUNT_DEF, /* ko_count */ | |
1846 | DRBD_MAX_BUFFERS_DEF, /* max_buffers */ | |
1847 | DRBD_MAX_EPOCH_SIZE_DEF, /* max_epoch_size */ | |
1848 | DRBD_UNPLUG_WATERMARK_DEF, /* unplug_watermark */ | |
1849 | DRBD_AFTER_SB_0P_DEF, /* after_sb_0p */ | |
1850 | DRBD_AFTER_SB_1P_DEF, /* after_sb_1p */ | |
1851 | DRBD_AFTER_SB_2P_DEF, /* after_sb_2p */ | |
1852 | DRBD_RR_CONFLICT_DEF, /* rr_conflict */ | |
1853 | DRBD_ON_CONGESTION_DEF, /* on_congestion */ | |
1854 | DRBD_CONG_FILL_DEF, /* cong_fill */ | |
1855 | DRBD_CONG_EXTENTS_DEF, /* cong_extents */ | |
1856 | 0, /* two_primaries */ | |
1857 | 0, /* want_lose */ | |
1858 | 0, /* no_cork */ | |
1859 | 0, /* always_asbp */ | |
1860 | 0, /* dry_run */ | |
1861 | 0, /* use_rle */ | |
1862 | }; | |
1863 | ||
1864 | err = net_conf_from_attrs(new_conf, info); | |
3b98c0c2 | 1865 | if (err) { |
b411b363 | 1866 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1867 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1868 | goto fail; |
1869 | } | |
1870 | ||
1871 | if (new_conf->two_primaries | |
1872 | && (new_conf->wire_protocol != DRBD_PROT_C)) { | |
1873 | retcode = ERR_NOT_PROTO_C; | |
1874 | goto fail; | |
47ff2d0a PR |
1875 | } |
1876 | ||
695d08fa | 1877 | rcu_read_lock(); |
80883197 PR |
1878 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1879 | if (get_ldev(mdev)) { | |
1880 | enum drbd_fencing_p fp = mdev->ldev->dc.fencing; | |
1881 | put_ldev(mdev); | |
1882 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) { | |
1883 | retcode = ERR_STONITH_AND_PROT_A; | |
695d08fa | 1884 | goto fail_rcu_unlock; |
80883197 PR |
1885 | } |
1886 | } | |
1887 | if (mdev->state.role == R_PRIMARY && new_conf->want_lose) { | |
1888 | retcode = ERR_DISCARD; | |
695d08fa | 1889 | goto fail_rcu_unlock; |
47ff2d0a | 1890 | } |
80883197 PR |
1891 | if (!mdev->bitmap) { |
1892 | if(drbd_bm_init(mdev)) { | |
1893 | retcode = ERR_NOMEM; | |
695d08fa | 1894 | goto fail_rcu_unlock; |
80883197 PR |
1895 | } |
1896 | } | |
47ff2d0a | 1897 | } |
695d08fa | 1898 | rcu_read_unlock(); |
b411b363 | 1899 | |
422028b1 PR |
1900 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) { |
1901 | retcode = ERR_CONG_NOT_PROTO_A; | |
1902 | goto fail; | |
1903 | } | |
1904 | ||
b411b363 PR |
1905 | retcode = NO_ERROR; |
1906 | ||
1907 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
1908 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b | 1909 | |
ef356262 | 1910 | /* No need to take drbd_cfg_rwsem here. All reconfiguration is |
543cc10b LE |
1911 | * strictly serialized on genl_lock(). We are protected against |
1912 | * concurrent reconfiguration/addition/deletion */ | |
80883197 PR |
1913 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
1914 | if (oconn == tconn) | |
b411b363 | 1915 | continue; |
80883197 PR |
1916 | if (get_net_conf(oconn)) { |
1917 | taken_addr = (struct sockaddr *)&oconn->net_conf->my_addr; | |
1918 | if (new_conf->my_addr_len == oconn->net_conf->my_addr_len && | |
b411b363 PR |
1919 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
1920 | retcode = ERR_LOCAL_ADDR; | |
1921 | ||
80883197 PR |
1922 | taken_addr = (struct sockaddr *)&oconn->net_conf->peer_addr; |
1923 | if (new_conf->peer_addr_len == oconn->net_conf->peer_addr_len && | |
b411b363 PR |
1924 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
1925 | retcode = ERR_PEER_ADDR; | |
1926 | ||
80883197 | 1927 | put_net_conf(oconn); |
b411b363 PR |
1928 | if (retcode != NO_ERROR) |
1929 | goto fail; | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | if (new_conf->cram_hmac_alg[0] != 0) { | |
1934 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1935 | new_conf->cram_hmac_alg); | |
1936 | tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC); | |
1937 | if (IS_ERR(tfm)) { | |
1938 | tfm = NULL; | |
1939 | retcode = ERR_AUTH_ALG; | |
1940 | goto fail; | |
1941 | } | |
1942 | ||
0798219f | 1943 | if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) { |
b411b363 PR |
1944 | retcode = ERR_AUTH_ALG_ND; |
1945 | goto fail; | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | if (new_conf->integrity_alg[0]) { | |
1950 | integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1951 | if (IS_ERR(integrity_w_tfm)) { | |
1952 | integrity_w_tfm = NULL; | |
1953 | retcode=ERR_INTEGRITY_ALG; | |
1954 | goto fail; | |
1955 | } | |
1956 | ||
1957 | if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) { | |
1958 | retcode=ERR_INTEGRITY_ALG_ND; | |
1959 | goto fail; | |
1960 | } | |
1961 | ||
1962 | integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1963 | if (IS_ERR(integrity_r_tfm)) { | |
1964 | integrity_r_tfm = NULL; | |
1965 | retcode=ERR_INTEGRITY_ALG; | |
1966 | goto fail; | |
1967 | } | |
1968 | } | |
1969 | ||
b411b363 PR |
1970 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
1971 | ||
80883197 | 1972 | /* allocation not in the IO path, cqueue thread context */ |
b411b363 PR |
1973 | if (integrity_w_tfm) { |
1974 | i = crypto_hash_digestsize(integrity_w_tfm); | |
b411b363 PR |
1975 | int_dig_in = kmalloc(i, GFP_KERNEL); |
1976 | if (!int_dig_in) { | |
1977 | retcode = ERR_NOMEM; | |
1978 | goto fail; | |
1979 | } | |
1980 | int_dig_vv = kmalloc(i, GFP_KERNEL); | |
1981 | if (!int_dig_vv) { | |
1982 | retcode = ERR_NOMEM; | |
1983 | goto fail; | |
1984 | } | |
1985 | } | |
1986 | ||
80883197 PR |
1987 | conn_flush_workqueue(tconn); |
1988 | spin_lock_irq(&tconn->req_lock); | |
1989 | if (tconn->net_conf != NULL) { | |
b411b363 | 1990 | retcode = ERR_NET_CONFIGURED; |
80883197 | 1991 | spin_unlock_irq(&tconn->req_lock); |
b411b363 PR |
1992 | goto fail; |
1993 | } | |
80883197 | 1994 | tconn->net_conf = new_conf; |
b411b363 | 1995 | |
80883197 PR |
1996 | crypto_free_hash(tconn->cram_hmac_tfm); |
1997 | tconn->cram_hmac_tfm = tfm; | |
b411b363 | 1998 | |
80883197 PR |
1999 | crypto_free_hash(tconn->integrity_w_tfm); |
2000 | tconn->integrity_w_tfm = integrity_w_tfm; | |
b411b363 | 2001 | |
80883197 PR |
2002 | crypto_free_hash(tconn->integrity_r_tfm); |
2003 | tconn->integrity_r_tfm = integrity_r_tfm; | |
b411b363 | 2004 | |
80883197 PR |
2005 | kfree(tconn->int_dig_in); |
2006 | kfree(tconn->int_dig_vv); | |
80883197 PR |
2007 | tconn->int_dig_in=int_dig_in; |
2008 | tconn->int_dig_vv=int_dig_vv; | |
2009 | retcode = _conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
2010 | spin_unlock_irq(&tconn->req_lock); | |
b411b363 | 2011 | |
695d08fa | 2012 | rcu_read_lock(); |
80883197 PR |
2013 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2014 | mdev->send_cnt = 0; | |
2015 | mdev->recv_cnt = 0; | |
2016 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
2017 | } | |
695d08fa | 2018 | rcu_read_unlock(); |
80883197 | 2019 | conn_reconfig_done(tconn); |
3b98c0c2 | 2020 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2021 | return 0; |
2022 | ||
695d08fa PR |
2023 | fail_rcu_unlock: |
2024 | rcu_read_unlock(); | |
b411b363 | 2025 | fail: |
b411b363 PR |
2026 | kfree(int_dig_in); |
2027 | kfree(int_dig_vv); | |
2028 | crypto_free_hash(tfm); | |
2029 | crypto_free_hash(integrity_w_tfm); | |
2030 | crypto_free_hash(integrity_r_tfm); | |
b411b363 PR |
2031 | kfree(new_conf); |
2032 | ||
80883197 | 2033 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2034 | out: |
2035 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2036 | return 0; |
2037 | } | |
2038 | ||
85f75dd7 LE |
2039 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2040 | { | |
2041 | enum drbd_state_rv rv; | |
2042 | if (force) { | |
2043 | spin_lock_irq(&tconn->req_lock); | |
2044 | if (tconn->cstate >= C_WF_CONNECTION) | |
2045 | _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
2046 | spin_unlock_irq(&tconn->req_lock); | |
2047 | return SS_SUCCESS; | |
2048 | } | |
2049 | ||
2050 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), 0); | |
2051 | ||
2052 | switch (rv) { | |
2053 | case SS_NOTHING_TO_DO: | |
2054 | case SS_ALREADY_STANDALONE: | |
2055 | return SS_SUCCESS; | |
2056 | case SS_PRIMARY_NOP: | |
2057 | /* Our state checking code wants to see the peer outdated. */ | |
2058 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2059 | pdsk, D_OUTDATED), CS_VERBOSE); | |
2060 | break; | |
2061 | case SS_CW_FAILED_BY_PEER: | |
2062 | /* The peer probably wants to see us outdated. */ | |
2063 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2064 | disk, D_OUTDATED), 0); | |
2065 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
2066 | conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
2067 | rv = SS_SUCCESS; | |
2068 | } | |
2069 | break; | |
2070 | default:; | |
2071 | /* no special handling necessary */ | |
2072 | } | |
2073 | ||
2074 | return rv; | |
2075 | } | |
2076 | ||
3b98c0c2 | 2077 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2078 | { |
3b98c0c2 LE |
2079 | struct disconnect_parms parms; |
2080 | struct drbd_tconn *tconn; | |
85f75dd7 | 2081 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2082 | enum drbd_ret_code retcode; |
2083 | int err; | |
2561b9c1 | 2084 | |
3b98c0c2 LE |
2085 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2086 | if (!adm_ctx.reply_skb) | |
2087 | return retcode; | |
2088 | if (retcode != NO_ERROR) | |
2561b9c1 | 2089 | goto fail; |
3b98c0c2 LE |
2090 | |
2091 | tconn = adm_ctx.tconn; | |
2092 | memset(&parms, 0, sizeof(parms)); | |
2093 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2094 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2095 | if (err) { |
2096 | retcode = ERR_MANDATORY_TAG; | |
2097 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2098 | goto fail; | |
2099 | } | |
2561b9c1 PR |
2100 | } |
2101 | ||
85f75dd7 LE |
2102 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2103 | if (rv < SS_SUCCESS) | |
b411b363 PR |
2104 | goto fail; |
2105 | ||
df24aa45 PR |
2106 | if (wait_event_interruptible(tconn->ping_wait, |
2107 | tconn->cstate != C_DISCONNECTING)) { | |
b411b363 PR |
2108 | /* Do not test for mdev->state.conn == C_STANDALONE, since |
2109 | someone else might connect us in the mean time! */ | |
2110 | retcode = ERR_INTR; | |
2111 | goto fail; | |
2112 | } | |
2113 | ||
b411b363 PR |
2114 | retcode = NO_ERROR; |
2115 | fail: | |
3b98c0c2 | 2116 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2117 | return 0; |
2118 | } | |
2119 | ||
2120 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2121 | { | |
2122 | int iass; /* I am sync source */ | |
2123 | ||
2124 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2125 | if (mdev->state.role != mdev->state.peer) | |
2126 | iass = (mdev->state.role == R_PRIMARY); | |
2127 | else | |
25703f83 | 2128 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
2129 | |
2130 | if (iass) | |
2131 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2132 | else | |
2133 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2134 | } | |
2135 | ||
3b98c0c2 | 2136 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2137 | { |
3b98c0c2 LE |
2138 | struct resize_parms rs; |
2139 | struct drbd_conf *mdev; | |
2140 | enum drbd_ret_code retcode; | |
b411b363 | 2141 | enum determine_dev_size dd; |
6495d2c6 | 2142 | enum dds_flags ddsf; |
3b98c0c2 | 2143 | int err; |
b411b363 | 2144 | |
3b98c0c2 LE |
2145 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2146 | if (!adm_ctx.reply_skb) | |
2147 | return retcode; | |
2148 | if (retcode != NO_ERROR) | |
b411b363 | 2149 | goto fail; |
3b98c0c2 LE |
2150 | |
2151 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2152 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2153 | err = resize_parms_from_attrs(&rs, info); |
3b98c0c2 LE |
2154 | if (err) { |
2155 | retcode = ERR_MANDATORY_TAG; | |
2156 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2157 | goto fail; | |
2158 | } | |
b411b363 PR |
2159 | } |
2160 | ||
3b98c0c2 | 2161 | mdev = adm_ctx.mdev; |
b411b363 PR |
2162 | if (mdev->state.conn > C_CONNECTED) { |
2163 | retcode = ERR_RESIZE_RESYNC; | |
2164 | goto fail; | |
2165 | } | |
2166 | ||
2167 | if (mdev->state.role == R_SECONDARY && | |
2168 | mdev->state.peer == R_SECONDARY) { | |
2169 | retcode = ERR_NO_PRIMARY; | |
2170 | goto fail; | |
2171 | } | |
2172 | ||
2173 | if (!get_ldev(mdev)) { | |
2174 | retcode = ERR_NO_DISK; | |
2175 | goto fail; | |
2176 | } | |
2177 | ||
31890f4a | 2178 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
2179 | retcode = ERR_NEED_APV_93; |
2180 | goto fail; | |
2181 | } | |
2182 | ||
087c2492 | 2183 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2184 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 PR |
2185 | |
2186 | mdev->ldev->dc.disk_size = (sector_t)rs.resize_size; | |
6495d2c6 | 2187 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2188 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2189 | drbd_md_sync(mdev); |
2190 | put_ldev(mdev); | |
2191 | if (dd == dev_size_error) { | |
2192 | retcode = ERR_NOMEM_BITMAP; | |
2193 | goto fail; | |
2194 | } | |
2195 | ||
087c2492 | 2196 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2197 | if (dd == grew) |
2198 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2199 | ||
2200 | drbd_send_uuids(mdev); | |
6495d2c6 | 2201 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
2202 | } |
2203 | ||
2204 | fail: | |
3b98c0c2 | 2205 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2206 | return 0; |
2207 | } | |
2208 | ||
f399002e | 2209 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2210 | { |
3b98c0c2 | 2211 | enum drbd_ret_code retcode; |
b411b363 | 2212 | cpumask_var_t new_cpu_mask; |
f399002e | 2213 | struct drbd_tconn *tconn; |
778f271d | 2214 | int *rs_plan_s = NULL; |
f399002e LE |
2215 | struct res_opts sc; |
2216 | int err; | |
b411b363 | 2217 | |
f399002e | 2218 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3b98c0c2 LE |
2219 | if (!adm_ctx.reply_skb) |
2220 | return retcode; | |
2221 | if (retcode != NO_ERROR) | |
2222 | goto fail; | |
f399002e | 2223 | tconn = adm_ctx.tconn; |
3b98c0c2 | 2224 | |
b411b363 PR |
2225 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
2226 | retcode = ERR_NOMEM; | |
3b98c0c2 | 2227 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
2228 | goto fail; |
2229 | } | |
2230 | ||
3b98c0c2 LE |
2231 | if (((struct drbd_genlmsghdr*)info->userhdr)->flags |
2232 | & DRBD_GENL_F_SET_DEFAULTS) { | |
f399002e | 2233 | memset(&sc, 0, sizeof(struct res_opts)); |
265be2d0 | 2234 | sc.on_no_data = DRBD_ON_NO_DATA_DEF; |
b411b363 | 2235 | } else |
f399002e | 2236 | sc = tconn->res_opts; |
b411b363 | 2237 | |
f399002e | 2238 | err = res_opts_from_attrs(&sc, info); |
3b98c0c2 | 2239 | if (err) { |
b411b363 | 2240 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2241 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2242 | goto fail; |
2243 | } | |
2244 | ||
b411b363 PR |
2245 | /* silently ignore cpu mask on UP kernel */ |
2246 | if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) { | |
2247 | err = __bitmap_parse(sc.cpu_mask, 32, 0, | |
2248 | cpumask_bits(new_cpu_mask), nr_cpu_ids); | |
2249 | if (err) { | |
f399002e | 2250 | conn_warn(tconn, "__bitmap_parse() failed with %d\n", err); |
b411b363 PR |
2251 | retcode = ERR_CPU_MASK_PARSE; |
2252 | goto fail; | |
2253 | } | |
2254 | } | |
2255 | ||
b411b363 | 2256 | |
f399002e | 2257 | tconn->res_opts = sc; |
b411b363 | 2258 | |
f399002e LE |
2259 | if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) { |
2260 | cpumask_copy(tconn->cpu_mask, new_cpu_mask); | |
2261 | drbd_calc_cpu_mask(tconn); | |
2262 | tconn->receiver.reset_cpu_mask = 1; | |
2263 | tconn->asender.reset_cpu_mask = 1; | |
2264 | tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2265 | } |
2266 | ||
b411b363 | 2267 | fail: |
778f271d | 2268 | kfree(rs_plan_s); |
b411b363 | 2269 | free_cpumask_var(new_cpu_mask); |
3b98c0c2 LE |
2270 | |
2271 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2272 | return 0; |
2273 | } | |
2274 | ||
3b98c0c2 | 2275 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2276 | { |
3b98c0c2 LE |
2277 | struct drbd_conf *mdev; |
2278 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2279 | ||
2280 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2281 | if (!adm_ctx.reply_skb) | |
2282 | return retcode; | |
2283 | if (retcode != NO_ERROR) | |
2284 | goto out; | |
2285 | ||
2286 | mdev = adm_ctx.mdev; | |
b411b363 | 2287 | |
194bfb32 LE |
2288 | /* If there is still bitmap IO pending, probably because of a previous |
2289 | * resync just being finished, wait for it before requesting a new resync. */ | |
2290 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2291 | ||
b411b363 PR |
2292 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2293 | ||
2294 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2295 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2296 | ||
2297 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2298 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2299 | if (mdev->state.conn < C_CONNECTED) |
2300 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2301 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2302 | |
2303 | if (retcode != SS_NEED_CONNECTION) | |
2304 | break; | |
2305 | ||
2306 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2307 | } | |
2308 | ||
3b98c0c2 LE |
2309 | out: |
2310 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2311 | return 0; |
2312 | } | |
2313 | ||
0778286a PR |
2314 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2315 | { | |
2316 | int rv; | |
2317 | ||
2318 | rv = drbd_bmio_set_n_write(mdev); | |
2319 | drbd_suspend_al(mdev); | |
2320 | return rv; | |
2321 | } | |
2322 | ||
3b98c0c2 LE |
2323 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2324 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2325 | { |
3b98c0c2 | 2326 | enum drbd_ret_code retcode; |
194bfb32 | 2327 | |
3b98c0c2 LE |
2328 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2329 | if (!adm_ctx.reply_skb) | |
2330 | return retcode; | |
2331 | if (retcode != NO_ERROR) | |
2332 | goto out; | |
b411b363 | 2333 | |
3b98c0c2 LE |
2334 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2335 | out: | |
2336 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2337 | return 0; |
2338 | } | |
2339 | ||
3b98c0c2 | 2340 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2341 | { |
3b98c0c2 LE |
2342 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2343 | } | |
b411b363 | 2344 | |
3b98c0c2 LE |
2345 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2346 | { | |
2347 | enum drbd_ret_code retcode; | |
2348 | ||
2349 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2350 | if (!adm_ctx.reply_skb) | |
2351 | return retcode; | |
2352 | if (retcode != NO_ERROR) | |
2353 | goto out; | |
b411b363 | 2354 | |
3b98c0c2 LE |
2355 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2356 | retcode = ERR_PAUSE_IS_SET; | |
2357 | out: | |
2358 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2359 | return 0; |
2360 | } | |
2361 | ||
3b98c0c2 | 2362 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2363 | { |
da9fbc27 | 2364 | union drbd_dev_state s; |
3b98c0c2 LE |
2365 | enum drbd_ret_code retcode; |
2366 | ||
2367 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2368 | if (!adm_ctx.reply_skb) | |
2369 | return retcode; | |
2370 | if (retcode != NO_ERROR) | |
2371 | goto out; | |
b411b363 | 2372 | |
3b98c0c2 LE |
2373 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2374 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2375 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2376 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2377 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2378 | } else { | |
2379 | retcode = ERR_PAUSE_IS_CLEAR; | |
2380 | } | |
2381 | } | |
b411b363 | 2382 | |
3b98c0c2 LE |
2383 | out: |
2384 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2385 | return 0; |
2386 | } | |
2387 | ||
3b98c0c2 | 2388 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2389 | { |
3b98c0c2 | 2390 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2391 | } |
2392 | ||
3b98c0c2 | 2393 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2394 | { |
3b98c0c2 LE |
2395 | struct drbd_conf *mdev; |
2396 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2397 | ||
2398 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2399 | if (!adm_ctx.reply_skb) | |
2400 | return retcode; | |
2401 | if (retcode != NO_ERROR) | |
2402 | goto out; | |
2403 | ||
2404 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2405 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2406 | drbd_uuid_new_current(mdev); | |
2407 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2408 | } |
265be2d0 | 2409 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2410 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2411 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2412 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2413 | tl_clear(mdev->tconn); |
265be2d0 | 2414 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2415 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2416 | } |
2417 | drbd_resume_io(mdev); | |
2418 | ||
3b98c0c2 LE |
2419 | out: |
2420 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2421 | return 0; |
2422 | } | |
2423 | ||
3b98c0c2 | 2424 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2425 | { |
3b98c0c2 | 2426 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2427 | } |
2428 | ||
543cc10b LE |
2429 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *conn_name, unsigned vnr) |
2430 | { | |
2431 | struct nlattr *nla; | |
2432 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2433 | if (!nla) | |
2434 | goto nla_put_failure; | |
2435 | if (vnr != VOLUME_UNSPECIFIED) | |
2436 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
2437 | NLA_PUT_STRING(skb, T_ctx_conn_name, conn_name); | |
2438 | nla_nest_end(skb, nla); | |
2439 | return 0; | |
2440 | ||
2441 | nla_put_failure: | |
2442 | if (nla) | |
2443 | nla_nest_cancel(skb, nla); | |
2444 | return -EMSGSIZE; | |
2445 | } | |
2446 | ||
3b98c0c2 LE |
2447 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2448 | const struct sib_info *sib) | |
b411b363 | 2449 | { |
3b98c0c2 LE |
2450 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
2451 | struct nlattr *nla; | |
2452 | int got_ldev; | |
2453 | int got_net; | |
2454 | int err = 0; | |
2455 | int exclude_sensitive; | |
2456 | ||
2457 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2458 | * to. So we better exclude_sensitive information. | |
2459 | * | |
2460 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2461 | * in the context of the requesting user process. Exclude sensitive | |
2462 | * information, unless current has superuser. | |
2463 | * | |
2464 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2465 | * relies on the current implementation of netlink_dump(), which | |
2466 | * executes the dump callback successively from netlink_recvmsg(), | |
2467 | * always in the context of the receiving process */ | |
2468 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2469 | ||
2470 | got_ldev = get_ldev(mdev); | |
2471 | got_net = get_net_conf(mdev->tconn); | |
2472 | ||
2473 | /* We need to add connection name and volume number information still. | |
2474 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2475 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2476 | goto nla_put_failure; |
3b98c0c2 | 2477 | |
f399002e LE |
2478 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2479 | goto nla_put_failure; | |
2480 | ||
3b98c0c2 LE |
2481 | if (got_ldev) |
2482 | if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive)) | |
2483 | goto nla_put_failure; | |
2484 | if (got_net) | |
2485 | if (net_conf_to_skb(skb, mdev->tconn->net_conf, exclude_sensitive)) | |
2486 | goto nla_put_failure; | |
2487 | ||
3b98c0c2 LE |
2488 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2489 | if (!nla) | |
2490 | goto nla_put_failure; | |
2491 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2492 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2493 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2494 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2495 | ||
2496 | if (got_ldev) { | |
2497 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2498 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2499 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2500 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2501 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2502 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2503 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2504 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2505 | } | |
b411b363 PR |
2506 | } |
2507 | ||
3b98c0c2 LE |
2508 | if (sib) { |
2509 | switch(sib->sib_reason) { | |
2510 | case SIB_SYNC_PROGRESS: | |
2511 | case SIB_GET_STATUS_REPLY: | |
2512 | break; | |
2513 | case SIB_STATE_CHANGE: | |
2514 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2515 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2516 | break; | |
2517 | case SIB_HELPER_POST: | |
2518 | NLA_PUT_U32(skb, | |
2519 | T_helper_exit_code, sib->helper_exit_code); | |
2520 | /* fall through */ | |
2521 | case SIB_HELPER_PRE: | |
2522 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2523 | break; | |
2524 | } | |
b411b363 | 2525 | } |
3b98c0c2 | 2526 | nla_nest_end(skb, nla); |
b411b363 | 2527 | |
3b98c0c2 LE |
2528 | if (0) |
2529 | nla_put_failure: | |
2530 | err = -EMSGSIZE; | |
2531 | if (got_ldev) | |
2532 | put_ldev(mdev); | |
2533 | if (got_net) | |
2534 | put_net_conf(mdev->tconn); | |
2535 | return err; | |
b411b363 PR |
2536 | } |
2537 | ||
3b98c0c2 | 2538 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2539 | { |
3b98c0c2 LE |
2540 | enum drbd_ret_code retcode; |
2541 | int err; | |
b411b363 | 2542 | |
3b98c0c2 LE |
2543 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2544 | if (!adm_ctx.reply_skb) | |
2545 | return retcode; | |
2546 | if (retcode != NO_ERROR) | |
2547 | goto out; | |
b411b363 | 2548 | |
3b98c0c2 LE |
2549 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2550 | if (err) { | |
2551 | nlmsg_free(adm_ctx.reply_skb); | |
2552 | return err; | |
b411b363 | 2553 | } |
3b98c0c2 LE |
2554 | out: |
2555 | drbd_adm_finish(info, retcode); | |
2556 | return 0; | |
b411b363 PR |
2557 | } |
2558 | ||
3b98c0c2 | 2559 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2560 | { |
3b98c0c2 LE |
2561 | struct drbd_conf *mdev; |
2562 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2563 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2564 | struct drbd_tconn *tconn = NULL; | |
2565 | struct drbd_tconn *tmp; | |
2566 | unsigned volume = cb->args[1]; | |
2567 | ||
2568 | /* Open coded, deferred, iteration: | |
2569 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2570 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2571 | * ... | |
2572 | * } | |
2573 | * } | |
2574 | * where tconn is cb->args[0]; | |
2575 | * and i is cb->args[1]; | |
2576 | * | |
3b98c0c2 LE |
2577 | * This may miss entries inserted after this dump started, |
2578 | * or entries deleted before they are reached. | |
543cc10b LE |
2579 | * |
2580 | * We need to make sure the mdev won't disappear while | |
2581 | * we are looking at it, and revalidate our iterators | |
2582 | * on each iteration. | |
2583 | */ | |
3b98c0c2 | 2584 | |
543cc10b | 2585 | /* synchronize with drbd_new_tconn/drbd_free_tconn */ |
ef356262 | 2586 | down_read(&drbd_cfg_rwsem); |
543cc10b LE |
2587 | next_tconn: |
2588 | /* revalidate iterator position */ | |
2589 | list_for_each_entry(tmp, &drbd_tconns, all_tconn) { | |
2590 | if (pos == NULL) { | |
2591 | /* first iteration */ | |
2592 | pos = tmp; | |
2593 | tconn = pos; | |
2594 | break; | |
2595 | } | |
2596 | if (tmp == pos) { | |
2597 | tconn = pos; | |
2598 | break; | |
2599 | } | |
2600 | } | |
2601 | if (tconn) { | |
2602 | mdev = idr_get_next(&tconn->volumes, &volume); | |
2603 | if (!mdev) { | |
2604 | /* No more volumes to dump on this tconn. | |
2605 | * Advance tconn iterator. */ | |
2606 | pos = list_entry(tconn->all_tconn.next, | |
2607 | struct drbd_tconn, all_tconn); | |
2608 | /* But, did we dump any volume on this tconn yet? */ | |
2609 | if (volume != 0) { | |
2610 | tconn = NULL; | |
2611 | volume = 0; | |
2612 | goto next_tconn; | |
2613 | } | |
2614 | } | |
2615 | ||
3b98c0c2 LE |
2616 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2617 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2618 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2619 | if (!dh) | |
543cc10b LE |
2620 | goto out; |
2621 | ||
2622 | if (!mdev) { | |
2623 | /* this is a tconn without a single volume */ | |
2624 | dh->minor = -1U; | |
2625 | dh->ret_code = NO_ERROR; | |
2626 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2627 | genlmsg_cancel(skb, dh); | |
2628 | else | |
2629 | genlmsg_end(skb, dh); | |
2630 | goto out; | |
2631 | } | |
3b98c0c2 | 2632 | |
543cc10b LE |
2633 | D_ASSERT(mdev->vnr == volume); |
2634 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2635 | |
543cc10b | 2636 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2637 | dh->ret_code = NO_ERROR; |
2638 | ||
2639 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2640 | genlmsg_cancel(skb, dh); | |
543cc10b | 2641 | goto out; |
3b98c0c2 LE |
2642 | } |
2643 | genlmsg_end(skb, dh); | |
2644 | } | |
b411b363 | 2645 | |
543cc10b | 2646 | out: |
ef356262 | 2647 | up_read(&drbd_cfg_rwsem); |
543cc10b LE |
2648 | /* where to start the next iteration */ |
2649 | cb->args[0] = (long)pos; | |
2650 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2651 | |
543cc10b LE |
2652 | /* No more tconns/volumes/minors found results in an empty skb. |
2653 | * Which will terminate the dump. */ | |
3b98c0c2 | 2654 | return skb->len; |
b411b363 PR |
2655 | } |
2656 | ||
3b98c0c2 | 2657 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2658 | { |
3b98c0c2 LE |
2659 | enum drbd_ret_code retcode; |
2660 | struct timeout_parms tp; | |
2661 | int err; | |
b411b363 | 2662 | |
3b98c0c2 LE |
2663 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2664 | if (!adm_ctx.reply_skb) | |
2665 | return retcode; | |
2666 | if (retcode != NO_ERROR) | |
2667 | goto out; | |
b411b363 | 2668 | |
3b98c0c2 LE |
2669 | tp.timeout_type = |
2670 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2671 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2672 | UT_DEFAULT; | |
b411b363 | 2673 | |
3b98c0c2 LE |
2674 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2675 | if (err) { | |
2676 | nlmsg_free(adm_ctx.reply_skb); | |
2677 | return err; | |
2678 | } | |
2679 | out: | |
2680 | drbd_adm_finish(info, retcode); | |
2681 | return 0; | |
b411b363 PR |
2682 | } |
2683 | ||
3b98c0c2 | 2684 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2685 | { |
3b98c0c2 LE |
2686 | struct drbd_conf *mdev; |
2687 | enum drbd_ret_code retcode; | |
b411b363 | 2688 | |
3b98c0c2 LE |
2689 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2690 | if (!adm_ctx.reply_skb) | |
2691 | return retcode; | |
2692 | if (retcode != NO_ERROR) | |
2693 | goto out; | |
873b0d5f | 2694 | |
3b98c0c2 LE |
2695 | mdev = adm_ctx.mdev; |
2696 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2697 | /* resume from last known position, if possible */ | |
2698 | struct start_ov_parms parms = | |
2699 | { .ov_start_sector = mdev->ov_start_sector }; | |
f399002e | 2700 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2701 | if (err) { |
2702 | retcode = ERR_MANDATORY_TAG; | |
2703 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2704 | goto out; | |
2705 | } | |
2706 | /* w_make_ov_request expects position to be aligned */ | |
2707 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2708 | } | |
873b0d5f LE |
2709 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2710 | * just being finished, wait for it before requesting a new resync. */ | |
2711 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2712 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2713 | out: | |
2714 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2715 | return 0; |
2716 | } | |
2717 | ||
2718 | ||
3b98c0c2 | 2719 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2720 | { |
3b98c0c2 LE |
2721 | struct drbd_conf *mdev; |
2722 | enum drbd_ret_code retcode; | |
b411b363 PR |
2723 | int skip_initial_sync = 0; |
2724 | int err; | |
3b98c0c2 | 2725 | struct new_c_uuid_parms args; |
b411b363 | 2726 | |
3b98c0c2 LE |
2727 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2728 | if (!adm_ctx.reply_skb) | |
2729 | return retcode; | |
2730 | if (retcode != NO_ERROR) | |
2731 | goto out_nolock; | |
b411b363 | 2732 | |
3b98c0c2 LE |
2733 | mdev = adm_ctx.mdev; |
2734 | memset(&args, 0, sizeof(args)); | |
2735 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 2736 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
2737 | if (err) { |
2738 | retcode = ERR_MANDATORY_TAG; | |
2739 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2740 | goto out_nolock; | |
2741 | } | |
b411b363 PR |
2742 | } |
2743 | ||
8410da8f | 2744 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2745 | |
2746 | if (!get_ldev(mdev)) { | |
2747 | retcode = ERR_NO_DISK; | |
2748 | goto out; | |
2749 | } | |
2750 | ||
2751 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2752 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2753 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2754 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2755 | skip_initial_sync = 1; | |
2756 | } else if (mdev->state.conn != C_STANDALONE) { | |
2757 | retcode = ERR_CONNECTED; | |
2758 | goto out_dec; | |
2759 | } | |
2760 | ||
2761 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2762 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2763 | ||
2764 | if (args.clear_bm) { | |
20ceb2b2 LE |
2765 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2766 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2767 | if (err) { |
2768 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2769 | retcode = ERR_IO_MD_DISK; | |
2770 | } | |
2771 | if (skip_initial_sync) { | |
2772 | drbd_send_uuids_skip_initial_sync(mdev); | |
2773 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2774 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2775 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2776 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2777 | CS_VERBOSE, NULL); | |
87eeee41 | 2778 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2779 | } |
2780 | } | |
2781 | ||
2782 | drbd_md_sync(mdev); | |
2783 | out_dec: | |
2784 | put_ldev(mdev); | |
2785 | out: | |
8410da8f | 2786 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2787 | out_nolock: |
2788 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2789 | return 0; |
2790 | } | |
2791 | ||
3b98c0c2 LE |
2792 | static enum drbd_ret_code |
2793 | drbd_check_conn_name(const char *name) | |
774b3055 | 2794 | { |
3b98c0c2 LE |
2795 | if (!name || !name[0]) { |
2796 | drbd_msg_put_info("connection name missing"); | |
2797 | return ERR_MANDATORY_TAG; | |
774b3055 | 2798 | } |
3b98c0c2 LE |
2799 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2800 | * we must not allow slashes */ | |
2801 | if (strchr(name, '/')) { | |
2802 | drbd_msg_put_info("invalid connection name"); | |
2803 | return ERR_INVALID_REQUEST; | |
774b3055 | 2804 | } |
3b98c0c2 | 2805 | return NO_ERROR; |
774b3055 PR |
2806 | } |
2807 | ||
3b98c0c2 | 2808 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2809 | { |
3b98c0c2 | 2810 | enum drbd_ret_code retcode; |
9f5180e5 | 2811 | |
3b98c0c2 LE |
2812 | retcode = drbd_adm_prepare(skb, info, 0); |
2813 | if (!adm_ctx.reply_skb) | |
2814 | return retcode; | |
2815 | if (retcode != NO_ERROR) | |
2816 | goto out; | |
b411b363 | 2817 | |
3b98c0c2 LE |
2818 | retcode = drbd_check_conn_name(adm_ctx.conn_name); |
2819 | if (retcode != NO_ERROR) | |
2820 | goto out; | |
b411b363 | 2821 | |
3b98c0c2 | 2822 | if (adm_ctx.tconn) { |
38f19616 LE |
2823 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2824 | retcode = ERR_INVALID_REQUEST; | |
2825 | drbd_msg_put_info("connection exists"); | |
2826 | } | |
2827 | /* else: still NO_ERROR */ | |
3b98c0c2 | 2828 | goto out; |
b411b363 PR |
2829 | } |
2830 | ||
3b98c0c2 | 2831 | if (!drbd_new_tconn(adm_ctx.conn_name)) |
b411b363 | 2832 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
2833 | out: |
2834 | drbd_adm_finish(info, retcode); | |
2835 | return 0; | |
b411b363 PR |
2836 | } |
2837 | ||
3b98c0c2 | 2838 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2839 | { |
3b98c0c2 LE |
2840 | struct drbd_genlmsghdr *dh = info->userhdr; |
2841 | enum drbd_ret_code retcode; | |
b411b363 | 2842 | |
3b98c0c2 LE |
2843 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2844 | if (!adm_ctx.reply_skb) | |
2845 | return retcode; | |
2846 | if (retcode != NO_ERROR) | |
2847 | goto out; | |
b411b363 | 2848 | |
3b98c0c2 LE |
2849 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
2850 | if (dh->minor >= minor_count) { | |
2851 | drbd_msg_put_info("requested minor out of range"); | |
2852 | retcode = ERR_INVALID_REQUEST; | |
2853 | goto out; | |
b411b363 | 2854 | } |
0c8e36d9 | 2855 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
2856 | drbd_msg_put_info("requested volume id out of range"); |
2857 | retcode = ERR_INVALID_REQUEST; | |
2858 | goto out; | |
b411b363 | 2859 | } |
b411b363 | 2860 | |
38f19616 LE |
2861 | /* drbd_adm_prepare made sure already |
2862 | * that mdev->tconn and mdev->vnr match the request. */ | |
2863 | if (adm_ctx.mdev) { | |
2864 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
2865 | retcode = ERR_MINOR_EXISTS; | |
2866 | /* else: still NO_ERROR */ | |
2867 | goto out; | |
2868 | } | |
2869 | ||
d3fcb490 | 2870 | down_write(&drbd_cfg_rwsem); |
3b98c0c2 | 2871 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
d3fcb490 | 2872 | up_write(&drbd_cfg_rwsem); |
3b98c0c2 LE |
2873 | out: |
2874 | drbd_adm_finish(info, retcode); | |
2875 | return 0; | |
b411b363 PR |
2876 | } |
2877 | ||
85f75dd7 LE |
2878 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
2879 | { | |
2880 | if (mdev->state.disk == D_DISKLESS && | |
2881 | /* no need to be mdev->state.conn == C_STANDALONE && | |
2882 | * we may want to delete a minor from a live replication group. | |
2883 | */ | |
2884 | mdev->state.role == R_SECONDARY) { | |
ff370e5a | 2885 | drbd_delete_device(mdev); |
85f75dd7 LE |
2886 | return NO_ERROR; |
2887 | } else | |
2888 | return ERR_MINOR_CONFIGURED; | |
2889 | } | |
2890 | ||
3b98c0c2 | 2891 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2892 | { |
3b98c0c2 | 2893 | enum drbd_ret_code retcode; |
b411b363 | 2894 | |
3b98c0c2 LE |
2895 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2896 | if (!adm_ctx.reply_skb) | |
2897 | return retcode; | |
2898 | if (retcode != NO_ERROR) | |
2899 | goto out; | |
b411b363 | 2900 | |
ef356262 | 2901 | down_write(&drbd_cfg_rwsem); |
85f75dd7 | 2902 | retcode = adm_delete_minor(adm_ctx.mdev); |
ef356262 | 2903 | up_write(&drbd_cfg_rwsem); |
85f75dd7 LE |
2904 | /* if this was the last volume of this connection, |
2905 | * this will terminate all threads */ | |
2906 | if (retcode == NO_ERROR) | |
cffec5b2 | 2907 | conn_reconfig_done(adm_ctx.tconn); |
85f75dd7 LE |
2908 | out: |
2909 | drbd_adm_finish(info, retcode); | |
2910 | return 0; | |
2911 | } | |
2912 | ||
2913 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
2914 | { | |
2915 | enum drbd_ret_code retcode; | |
2916 | enum drbd_state_rv rv; | |
2917 | struct drbd_conf *mdev; | |
2918 | unsigned i; | |
2919 | ||
2920 | retcode = drbd_adm_prepare(skb, info, 0); | |
2921 | if (!adm_ctx.reply_skb) | |
2922 | return retcode; | |
2923 | if (retcode != NO_ERROR) | |
2924 | goto out; | |
2925 | ||
2926 | if (!adm_ctx.tconn) { | |
2927 | retcode = ERR_CONN_NOT_KNOWN; | |
2928 | goto out; | |
2929 | } | |
2930 | ||
ef356262 | 2931 | down_read(&drbd_cfg_rwsem); |
85f75dd7 LE |
2932 | /* demote */ |
2933 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2934 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
2935 | if (retcode < SS_SUCCESS) { | |
2936 | drbd_msg_put_info("failed to demote"); | |
2937 | goto out_unlock; | |
2938 | } | |
2939 | } | |
2940 | ||
2941 | /* disconnect */ | |
2942 | rv = conn_try_disconnect(adm_ctx.tconn, 0); | |
2943 | if (rv < SS_SUCCESS) { | |
2944 | retcode = rv; /* enum type mismatch! */ | |
2945 | drbd_msg_put_info("failed to disconnect"); | |
2946 | goto out_unlock; | |
2947 | } | |
2948 | ||
2949 | /* detach */ | |
2950 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2951 | rv = adm_detach(mdev); | |
2952 | if (rv < SS_SUCCESS) { | |
2953 | retcode = rv; /* enum type mismatch! */ | |
2954 | drbd_msg_put_info("failed to detach"); | |
2955 | goto out_unlock; | |
2956 | } | |
2957 | } | |
ef356262 | 2958 | up_read(&drbd_cfg_rwsem); |
85f75dd7 LE |
2959 | |
2960 | /* delete volumes */ | |
ef356262 | 2961 | down_write(&drbd_cfg_rwsem); |
85f75dd7 LE |
2962 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { |
2963 | retcode = adm_delete_minor(mdev); | |
2964 | if (retcode != NO_ERROR) { | |
2965 | /* "can not happen" */ | |
2966 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 PR |
2967 | up_write(&drbd_cfg_rwsem); |
2968 | goto out; | |
85f75dd7 LE |
2969 | } |
2970 | } | |
2971 | ||
2972 | /* stop all threads */ | |
2973 | conn_reconfig_done(adm_ctx.tconn); | |
2974 | ||
2975 | /* delete connection */ | |
2976 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
2977 | drbd_free_tconn(adm_ctx.tconn); | |
2978 | retcode = NO_ERROR; | |
2979 | } else { | |
2980 | /* "can not happen" */ | |
2981 | retcode = ERR_CONN_IN_USE; | |
2982 | drbd_msg_put_info("failed to delete connection"); | |
85f75dd7 | 2983 | } |
ef356262 PR |
2984 | |
2985 | up_write(&drbd_cfg_rwsem); | |
2986 | goto out; | |
85f75dd7 | 2987 | out_unlock: |
ef356262 | 2988 | up_read(&drbd_cfg_rwsem); |
3b98c0c2 LE |
2989 | out: |
2990 | drbd_adm_finish(info, retcode); | |
2991 | return 0; | |
b411b363 PR |
2992 | } |
2993 | ||
3b98c0c2 | 2994 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2995 | { |
3b98c0c2 | 2996 | enum drbd_ret_code retcode; |
b411b363 | 2997 | |
3b98c0c2 LE |
2998 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2999 | if (!adm_ctx.reply_skb) | |
3000 | return retcode; | |
3001 | if (retcode != NO_ERROR) | |
3002 | goto out; | |
3003 | ||
ef356262 | 3004 | down_write(&drbd_cfg_rwsem); |
3b98c0c2 LE |
3005 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { |
3006 | drbd_free_tconn(adm_ctx.tconn); | |
3007 | retcode = NO_ERROR; | |
3008 | } else { | |
3009 | retcode = ERR_CONN_IN_USE; | |
b411b363 | 3010 | } |
ef356262 | 3011 | up_write(&drbd_cfg_rwsem); |
b411b363 | 3012 | |
3b98c0c2 LE |
3013 | out: |
3014 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3015 | return 0; |
3016 | } | |
3017 | ||
3b98c0c2 | 3018 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3019 | { |
3b98c0c2 LE |
3020 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3021 | struct sk_buff *msg; | |
3022 | struct drbd_genlmsghdr *d_out; | |
3023 | unsigned seq; | |
3024 | int err = -ENOMEM; | |
3025 | ||
3026 | seq = atomic_inc_return(&drbd_genl_seq); | |
3027 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3028 | if (!msg) | |
3029 | goto failed; | |
3030 | ||
3031 | err = -EMSGSIZE; | |
3032 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3033 | if (!d_out) /* cannot happen, but anyways. */ | |
3034 | goto nla_put_failure; | |
3035 | d_out->minor = mdev_to_minor(mdev); | |
3036 | d_out->ret_code = 0; | |
3037 | ||
3038 | if (nla_put_status_info(msg, mdev, sib)) | |
3039 | goto nla_put_failure; | |
3040 | genlmsg_end(msg, d_out); | |
3041 | err = drbd_genl_multicast_events(msg, 0); | |
3042 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3043 | if (err && err != -ESRCH) | |
3044 | goto failed; | |
b411b363 | 3045 | |
3b98c0c2 | 3046 | return; |
b411b363 | 3047 | |
3b98c0c2 LE |
3048 | nla_put_failure: |
3049 | nlmsg_free(msg); | |
3050 | failed: | |
3051 | dev_err(DEV, "Error %d while broadcasting event. " | |
3052 | "Event seq:%u sib_reason:%u\n", | |
3053 | err, seq, sib->sib_reason); | |
b411b363 | 3054 | } |