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