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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; |
44ed167d | 260 | struct net_conf *nc; |
b411b363 | 261 | |
44ed167d PR |
262 | rcu_read_lock(); |
263 | nc = rcu_dereference(tconn->net_conf); | |
264 | if (nc) { | |
265 | switch (((struct sockaddr *)nc->peer_addr)->sa_family) { | |
b411b363 PR |
266 | case AF_INET6: |
267 | afs = "ipv6"; | |
6b75dced | 268 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
44ed167d | 269 | &((struct sockaddr_in6 *)nc->peer_addr)->sin6_addr); |
b411b363 PR |
270 | break; |
271 | case AF_INET: | |
272 | afs = "ipv4"; | |
6b75dced | 273 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 274 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 PR |
275 | break; |
276 | default: | |
277 | afs = "ssocks"; | |
6b75dced | 278 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
44ed167d | 279 | &((struct sockaddr_in *)nc->peer_addr)->sin_addr); |
b411b363 | 280 | } |
6b75dced | 281 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
b411b363 | 282 | } |
44ed167d | 283 | rcu_read_unlock(); |
6b75dced PR |
284 | } |
285 | ||
286 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
287 | { | |
288 | char *envp[] = { "HOME=/", | |
289 | "TERM=linux", | |
290 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
291 | (char[20]) { }, /* address family */ | |
292 | (char[60]) { }, /* address */ | |
293 | NULL }; | |
294 | char mb[12]; | |
295 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
296 | struct sib_info sib; | |
297 | int ret; | |
298 | ||
299 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
300 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 301 | |
1090c056 LE |
302 | /* The helper may take some time. |
303 | * write out any unsynced meta data changes now */ | |
304 | drbd_md_sync(mdev); | |
305 | ||
b411b363 | 306 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
307 | sib.sib_reason = SIB_HELPER_PRE; |
308 | sib.helper_name = cmd; | |
309 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
310 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
311 | if (ret) | |
312 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
313 | usermode_helper, cmd, mb, | |
314 | (ret >> 8) & 0xff, ret); | |
315 | else | |
316 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
317 | usermode_helper, cmd, mb, | |
318 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
319 | sib.sib_reason = SIB_HELPER_POST; |
320 | sib.helper_exit_code = ret; | |
321 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
322 | |
323 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
324 | ret = 0; | |
325 | ||
326 | return ret; | |
327 | } | |
328 | ||
6b75dced PR |
329 | static void conn_md_sync(struct drbd_tconn *tconn) |
330 | { | |
331 | struct drbd_conf *mdev; | |
e90285e0 | 332 | int vnr; |
6b75dced | 333 | |
d3fcb490 | 334 | down_read(&drbd_cfg_rwsem); |
e90285e0 | 335 | idr_for_each_entry(&tconn->volumes, mdev, vnr) |
6b75dced | 336 | drbd_md_sync(mdev); |
d3fcb490 | 337 | up_read(&drbd_cfg_rwsem); |
6b75dced PR |
338 | } |
339 | ||
340 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
341 | { | |
342 | char *envp[] = { "HOME=/", | |
343 | "TERM=linux", | |
344 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
345 | (char[20]) { }, /* address family */ | |
346 | (char[60]) { }, /* address */ | |
347 | NULL }; | |
348 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
349 | int ret; | |
350 | ||
351 | setup_khelper_env(tconn, envp); | |
352 | conn_md_sync(tconn); | |
353 | ||
354 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
355 | /* TODO: conn_bcast_event() ?? */ | |
356 | ||
357 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
358 | if (ret) | |
359 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
360 | usermode_helper, cmd, tconn->name, | |
361 | (ret >> 8) & 0xff, ret); | |
362 | else | |
363 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
364 | usermode_helper, cmd, tconn->name, | |
365 | (ret >> 8) & 0xff, ret); | |
366 | /* TODO: conn_bcast_event() ?? */ | |
367 | ||
368 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
369 | ret = 0; | |
370 | ||
371 | return ret; | |
372 | } | |
373 | ||
cb703454 | 374 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 375 | { |
cb703454 PR |
376 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
377 | struct drbd_conf *mdev; | |
378 | int vnr; | |
379 | ||
695d08fa | 380 | rcu_read_lock(); |
cb703454 PR |
381 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
382 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
383 | fp = max_t(enum drbd_fencing_p, fp, mdev->ldev->dc.fencing); | |
384 | put_ldev(mdev); | |
385 | } | |
386 | } | |
695d08fa | 387 | rcu_read_unlock(); |
cb703454 PR |
388 | |
389 | return fp; | |
390 | } | |
391 | ||
392 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
393 | { | |
394 | union drbd_state mask = { }; | |
395 | union drbd_state val = { }; | |
396 | enum drbd_fencing_p fp; | |
b411b363 PR |
397 | char *ex_to_string; |
398 | int r; | |
b411b363 | 399 | |
cb703454 PR |
400 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
401 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
402 | return false; | |
403 | } | |
b411b363 | 404 | |
cb703454 PR |
405 | fp = highest_fencing_policy(tconn); |
406 | switch (fp) { | |
407 | case FP_NOT_AVAIL: | |
408 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 409 | goto out; |
cb703454 PR |
410 | case FP_DONT_CARE: |
411 | return true; | |
412 | default: ; | |
b411b363 PR |
413 | } |
414 | ||
cb703454 | 415 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
416 | |
417 | switch ((r>>8) & 0xff) { | |
418 | case 3: /* peer is inconsistent */ | |
419 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
420 | mask.pdsk = D_MASK; |
421 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
422 | break; |
423 | case 4: /* peer got outdated, or was already outdated */ | |
424 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
425 | mask.pdsk = D_MASK; |
426 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
427 | break; |
428 | case 5: /* peer was down */ | |
cb703454 | 429 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
430 | /* we will(have) create(d) a new UUID anyways... */ |
431 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
432 | mask.pdsk = D_MASK; |
433 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
434 | } else { |
435 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
436 | } |
437 | break; | |
438 | case 6: /* Peer is primary, voluntarily outdate myself. | |
439 | * This is useful when an unconnected R_SECONDARY is asked to | |
440 | * become R_PRIMARY, but finds the other peer being active. */ | |
441 | ex_to_string = "peer is active"; | |
cb703454 PR |
442 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
443 | mask.disk = D_MASK; | |
444 | val.disk = D_OUTDATED; | |
b411b363 PR |
445 | break; |
446 | case 7: | |
447 | if (fp != FP_STONITH) | |
cb703454 | 448 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 449 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
450 | mask.pdsk = D_MASK; |
451 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
452 | break; |
453 | default: | |
454 | /* The script is broken ... */ | |
cb703454 PR |
455 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
456 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
457 | } |
458 | ||
cb703454 PR |
459 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
460 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 461 | |
cb703454 | 462 | out: |
fb22c402 | 463 | |
cb703454 PR |
464 | /* Not using |
465 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
466 | here, because we might were able to re-establish the connection in the | |
467 | meantime. */ | |
468 | spin_lock_irq(&tconn->req_lock); | |
469 | if (tconn->cstate < C_WF_REPORT_PARAMS) | |
470 | _conn_request_state(tconn, mask, val, CS_VERBOSE); | |
471 | spin_unlock_irq(&tconn->req_lock); | |
472 | ||
473 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
474 | } |
475 | ||
87f7be4c PR |
476 | static int _try_outdate_peer_async(void *data) |
477 | { | |
cb703454 | 478 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 479 | |
cb703454 | 480 | conn_try_outdate_peer(tconn); |
87f7be4c | 481 | |
9dc9fbb3 | 482 | kref_put(&tconn->kref, &conn_destroy); |
87f7be4c PR |
483 | return 0; |
484 | } | |
485 | ||
cb703454 | 486 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
487 | { |
488 | struct task_struct *opa; | |
489 | ||
9dc9fbb3 | 490 | kref_get(&tconn->kref); |
cb703454 | 491 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
9dc9fbb3 | 492 | if (IS_ERR(opa)) { |
cb703454 | 493 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
9dc9fbb3 PR |
494 | kref_put(&tconn->kref, &conn_destroy); |
495 | } | |
87f7be4c | 496 | } |
b411b363 | 497 | |
bf885f8a AG |
498 | enum drbd_state_rv |
499 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
500 | { |
501 | const int max_tries = 4; | |
bf885f8a | 502 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 503 | struct net_conf *nc; |
b411b363 PR |
504 | int try = 0; |
505 | int forced = 0; | |
506 | union drbd_state mask, val; | |
b411b363 PR |
507 | |
508 | if (new_role == R_PRIMARY) | |
0625ac19 | 509 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 510 | |
8410da8f | 511 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
512 | |
513 | mask.i = 0; mask.role = R_MASK; | |
514 | val.i = 0; val.role = new_role; | |
515 | ||
516 | while (try++ < max_tries) { | |
bf885f8a | 517 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
518 | |
519 | /* in case we first succeeded to outdate, | |
520 | * but now suddenly could establish a connection */ | |
bf885f8a | 521 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
522 | val.pdsk = 0; |
523 | mask.pdsk = 0; | |
524 | continue; | |
525 | } | |
526 | ||
bf885f8a | 527 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
528 | (mdev->state.disk < D_UP_TO_DATE && |
529 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
530 | mask.disk = D_MASK; |
531 | val.disk = D_UP_TO_DATE; | |
532 | forced = 1; | |
533 | continue; | |
534 | } | |
535 | ||
bf885f8a | 536 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
537 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
538 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 539 | |
cb703454 | 540 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
541 | val.disk = D_UP_TO_DATE; |
542 | mask.disk = D_MASK; | |
543 | } | |
b411b363 PR |
544 | continue; |
545 | } | |
546 | ||
bf885f8a | 547 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 548 | goto out; |
bf885f8a | 549 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 550 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 551 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
552 | mask.pdsk = D_MASK; |
553 | val.pdsk = D_OUTDATED; | |
b411b363 | 554 | |
cb703454 | 555 | } |
b411b363 PR |
556 | continue; |
557 | } | |
bf885f8a | 558 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
559 | /* Maybe the peer is detected as dead very soon... |
560 | retry at most once more in this case. */ | |
44ed167d PR |
561 | int timeo; |
562 | rcu_read_lock(); | |
563 | nc = rcu_dereference(mdev->tconn->net_conf); | |
564 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
565 | rcu_read_unlock(); | |
566 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
567 | if (try < max_tries) |
568 | try = max_tries - 1; | |
569 | continue; | |
570 | } | |
bf885f8a AG |
571 | if (rv < SS_SUCCESS) { |
572 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 573 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 574 | if (rv < SS_SUCCESS) |
3b98c0c2 | 575 | goto out; |
b411b363 PR |
576 | } |
577 | break; | |
578 | } | |
579 | ||
bf885f8a | 580 | if (rv < SS_SUCCESS) |
3b98c0c2 | 581 | goto out; |
b411b363 PR |
582 | |
583 | if (forced) | |
584 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
585 | ||
586 | /* Wait until nothing is on the fly :) */ | |
587 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
588 | ||
589 | if (new_role == R_SECONDARY) { | |
81e84650 | 590 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
591 | if (get_ldev(mdev)) { |
592 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
593 | put_ldev(mdev); | |
594 | } | |
595 | } else { | |
91fd4dad PR |
596 | mutex_lock(&mdev->tconn->net_conf_update); |
597 | nc = mdev->tconn->net_conf; | |
44ed167d | 598 | if (nc) |
91fd4dad PR |
599 | nc->want_lose = 0; /* without copy; single bit op is atomic */ |
600 | mutex_unlock(&mdev->tconn->net_conf_update); | |
601 | ||
81e84650 | 602 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
603 | if (get_ldev(mdev)) { |
604 | if (((mdev->state.conn < C_CONNECTED || | |
605 | mdev->state.pdsk <= D_FAILED) | |
606 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
607 | drbd_uuid_new_current(mdev); | |
608 | ||
609 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
610 | put_ldev(mdev); | |
611 | } | |
612 | } | |
613 | ||
19f843aa LE |
614 | /* writeout of activity log covered areas of the bitmap |
615 | * to stable storage done in after state change already */ | |
b411b363 PR |
616 | |
617 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
618 | /* if this was forced, we should consider sync */ | |
619 | if (forced) | |
620 | drbd_send_uuids(mdev); | |
621 | drbd_send_state(mdev); | |
622 | } | |
623 | ||
624 | drbd_md_sync(mdev); | |
625 | ||
626 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 627 | out: |
8410da8f | 628 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 629 | return rv; |
b411b363 PR |
630 | } |
631 | ||
3b98c0c2 | 632 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 633 | { |
3b98c0c2 LE |
634 | return err == -ENOMSG ? "required attribute missing" : |
635 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 636 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 637 | "invalid attribute value"; |
b411b363 PR |
638 | } |
639 | ||
3b98c0c2 | 640 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 641 | { |
3b98c0c2 LE |
642 | struct set_role_parms parms; |
643 | int err; | |
644 | enum drbd_ret_code retcode; | |
b411b363 | 645 | |
3b98c0c2 LE |
646 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
647 | if (!adm_ctx.reply_skb) | |
648 | return retcode; | |
649 | if (retcode != NO_ERROR) | |
650 | goto out; | |
651 | ||
652 | memset(&parms, 0, sizeof(parms)); | |
653 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 654 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
655 | if (err) { |
656 | retcode = ERR_MANDATORY_TAG; | |
657 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
658 | goto out; | |
659 | } | |
660 | } | |
661 | ||
662 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
663 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
664 | else | |
665 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
666 | out: | |
667 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
668 | return 0; |
669 | } | |
670 | ||
671 | /* initializes the md.*_offset members, so we are able to find | |
672 | * the on disk meta data */ | |
673 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
674 | struct drbd_backing_dev *bdev) | |
675 | { | |
676 | sector_t md_size_sect = 0; | |
677 | switch (bdev->dc.meta_dev_idx) { | |
678 | default: | |
679 | /* v07 style fixed size indexed meta data */ | |
680 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
681 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
682 | bdev->md.al_offset = MD_AL_OFFSET; | |
683 | bdev->md.bm_offset = MD_BM_OFFSET; | |
684 | break; | |
685 | case DRBD_MD_INDEX_FLEX_EXT: | |
686 | /* just occupy the full device; unit: sectors */ | |
687 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
688 | bdev->md.md_offset = 0; | |
689 | bdev->md.al_offset = MD_AL_OFFSET; | |
690 | bdev->md.bm_offset = MD_BM_OFFSET; | |
691 | break; | |
692 | case DRBD_MD_INDEX_INTERNAL: | |
693 | case DRBD_MD_INDEX_FLEX_INT: | |
694 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
695 | /* al size is still fixed */ | |
7ad651b5 | 696 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
697 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
698 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
699 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
700 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
701 | md_size_sect = ALIGN(md_size_sect, 8); | |
702 | ||
703 | /* plus the "drbd meta data super block", | |
704 | * and the activity log; */ | |
705 | md_size_sect += MD_BM_OFFSET; | |
706 | ||
707 | bdev->md.md_size_sect = md_size_sect; | |
708 | /* bitmap offset is adjusted by 'super' block size */ | |
709 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
710 | break; | |
711 | } | |
712 | } | |
713 | ||
4b0715f0 | 714 | /* input size is expected to be in KB */ |
b411b363 PR |
715 | char *ppsize(char *buf, unsigned long long size) |
716 | { | |
4b0715f0 LE |
717 | /* Needs 9 bytes at max including trailing NUL: |
718 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
719 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
720 | int base = 0; | |
4b0715f0 | 721 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
722 | /* shift + round */ |
723 | size = (size >> 10) + !!(size & (1<<9)); | |
724 | base++; | |
725 | } | |
4b0715f0 | 726 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
727 | |
728 | return buf; | |
729 | } | |
730 | ||
731 | /* there is still a theoretical deadlock when called from receiver | |
732 | * on an D_INCONSISTENT R_PRIMARY: | |
733 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
734 | * packet from remote to dec_ap_bio again. | |
735 | * receiver receive_sizes(), comes here, | |
736 | * waits for ap_bio_cnt == 0. -> deadlock. | |
737 | * but this cannot happen, actually, because: | |
738 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
739 | * (not connected, or bad/no disk on peer): | |
740 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
741 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
742 | * peer may not initiate a resize. | |
743 | */ | |
3b98c0c2 LE |
744 | /* Note these are not to be confused with |
745 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
746 | * which are (sub) state changes triggered by admin (drbdsetup), | |
747 | * and can be long lived. | |
748 | * This changes an mdev->flag, is triggered by drbd internals, | |
749 | * and should be short-lived. */ | |
b411b363 PR |
750 | void drbd_suspend_io(struct drbd_conf *mdev) |
751 | { | |
752 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 753 | if (drbd_suspended(mdev)) |
265be2d0 | 754 | return; |
b411b363 PR |
755 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
756 | } | |
757 | ||
758 | void drbd_resume_io(struct drbd_conf *mdev) | |
759 | { | |
760 | clear_bit(SUSPEND_IO, &mdev->flags); | |
761 | wake_up(&mdev->misc_wait); | |
762 | } | |
763 | ||
764 | /** | |
765 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
766 | * @mdev: DRBD device. | |
767 | * | |
768 | * Returns 0 on success, negative return values indicate errors. | |
769 | * You should call drbd_md_sync() after calling this function. | |
770 | */ | |
24c4830c | 771 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
772 | { |
773 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
774 | sector_t la_size; | |
775 | sector_t size; | |
776 | char ppb[10]; | |
777 | ||
778 | int md_moved, la_size_changed; | |
779 | enum determine_dev_size rv = unchanged; | |
780 | ||
781 | /* race: | |
782 | * application request passes inc_ap_bio, | |
783 | * but then cannot get an AL-reference. | |
784 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
785 | * | |
786 | * to avoid that: | |
787 | * Suspend IO right here. | |
788 | * still lock the act_log to not trigger ASSERTs there. | |
789 | */ | |
790 | drbd_suspend_io(mdev); | |
791 | ||
792 | /* no wait necessary anymore, actually we could assert that */ | |
793 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
794 | ||
795 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
796 | prev_size = mdev->ldev->md.md_size_sect; | |
797 | la_size = mdev->ldev->md.la_size_sect; | |
798 | ||
799 | /* TODO: should only be some assert here, not (re)init... */ | |
800 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
801 | ||
d845030f | 802 | size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED); |
b411b363 PR |
803 | |
804 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
805 | drbd_bm_capacity(mdev) != size) { | |
806 | int err; | |
02d9a94b | 807 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
808 | if (unlikely(err)) { |
809 | /* currently there is only one error: ENOMEM! */ | |
810 | size = drbd_bm_capacity(mdev)>>1; | |
811 | if (size == 0) { | |
812 | dev_err(DEV, "OUT OF MEMORY! " | |
813 | "Could not allocate bitmap!\n"); | |
814 | } else { | |
815 | dev_err(DEV, "BM resizing failed. " | |
816 | "Leaving size unchanged at size = %lu KB\n", | |
817 | (unsigned long)size); | |
818 | } | |
819 | rv = dev_size_error; | |
820 | } | |
821 | /* racy, see comments above. */ | |
822 | drbd_set_my_capacity(mdev, size); | |
823 | mdev->ldev->md.la_size_sect = size; | |
824 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
825 | (unsigned long long)size>>1); | |
826 | } | |
827 | if (rv == dev_size_error) | |
828 | goto out; | |
829 | ||
830 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
831 | ||
832 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
833 | || prev_size != mdev->ldev->md.md_size_sect; | |
834 | ||
835 | if (la_size_changed || md_moved) { | |
24dccabb AG |
836 | int err; |
837 | ||
b411b363 PR |
838 | drbd_al_shrink(mdev); /* All extents inactive. */ |
839 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
840 | la_size_changed && md_moved ? "size changed and md moved" : | |
841 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
842 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
843 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
844 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
845 | if (err) { |
846 | rv = dev_size_error; | |
847 | goto out; | |
848 | } | |
b411b363 PR |
849 | drbd_md_mark_dirty(mdev); |
850 | } | |
851 | ||
852 | if (size > la_size) | |
853 | rv = grew; | |
854 | if (size < la_size) | |
855 | rv = shrunk; | |
856 | out: | |
857 | lc_unlock(mdev->act_log); | |
858 | wake_up(&mdev->al_wait); | |
859 | drbd_resume_io(mdev); | |
860 | ||
861 | return rv; | |
862 | } | |
863 | ||
864 | sector_t | |
a393db6f | 865 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space) |
b411b363 PR |
866 | { |
867 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
868 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
869 | sector_t m_size; /* my size */ | |
870 | sector_t u_size = bdev->dc.disk_size; /* size requested by user. */ | |
871 | sector_t size = 0; | |
872 | ||
873 | m_size = drbd_get_max_capacity(bdev); | |
874 | ||
a393db6f PR |
875 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
876 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
877 | p_size = m_size; | |
878 | } | |
879 | ||
b411b363 PR |
880 | if (p_size && m_size) { |
881 | size = min_t(sector_t, p_size, m_size); | |
882 | } else { | |
883 | if (la_size) { | |
884 | size = la_size; | |
885 | if (m_size && m_size < size) | |
886 | size = m_size; | |
887 | if (p_size && p_size < size) | |
888 | size = p_size; | |
889 | } else { | |
890 | if (m_size) | |
891 | size = m_size; | |
892 | if (p_size) | |
893 | size = p_size; | |
894 | } | |
895 | } | |
896 | ||
897 | if (size == 0) | |
898 | dev_err(DEV, "Both nodes diskless!\n"); | |
899 | ||
900 | if (u_size) { | |
901 | if (u_size > size) | |
902 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
903 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
904 | else | |
905 | size = u_size; | |
906 | } | |
907 | ||
908 | return size; | |
909 | } | |
910 | ||
911 | /** | |
912 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
913 | * @mdev: DRBD device. | |
914 | * | |
915 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
916 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
917 | * this function. | |
918 | */ | |
f399002e | 919 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
920 | { |
921 | struct lru_cache *n, *t; | |
922 | struct lc_element *e; | |
923 | unsigned int in_use; | |
924 | int i; | |
925 | ||
f399002e LE |
926 | if (!expect(dc->al_extents >= DRBD_AL_EXTENTS_MIN)) |
927 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
b411b363 PR |
928 | |
929 | if (mdev->act_log && | |
f399002e | 930 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
931 | return 0; |
932 | ||
933 | in_use = 0; | |
934 | t = mdev->act_log; | |
7ad651b5 | 935 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 936 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
937 | |
938 | if (n == NULL) { | |
939 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
940 | return -ENOMEM; | |
941 | } | |
942 | spin_lock_irq(&mdev->al_lock); | |
943 | if (t) { | |
944 | for (i = 0; i < t->nr_elements; i++) { | |
945 | e = lc_element_by_index(t, i); | |
946 | if (e->refcnt) | |
947 | dev_err(DEV, "refcnt(%d)==%d\n", | |
948 | e->lc_number, e->refcnt); | |
949 | in_use += e->refcnt; | |
950 | } | |
951 | } | |
952 | if (!in_use) | |
953 | mdev->act_log = n; | |
954 | spin_unlock_irq(&mdev->al_lock); | |
955 | if (in_use) { | |
956 | dev_err(DEV, "Activity log still in use!\n"); | |
957 | lc_destroy(n); | |
958 | return -EBUSY; | |
959 | } else { | |
960 | if (t) | |
961 | lc_destroy(t); | |
962 | } | |
963 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
964 | return 0; | |
965 | } | |
966 | ||
99432fcc | 967 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
968 | { |
969 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
970 | int max_hw_sectors = max_bio_size >> 9; |
971 | int max_segments = 0; | |
972 | ||
973 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
974 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
975 | ||
976 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
977 | max_segments = mdev->ldev->dc.max_bio_bvecs; | |
978 | put_ldev(mdev); | |
979 | } | |
b411b363 | 980 | |
b411b363 | 981 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
982 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
983 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
984 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
985 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 986 | |
99432fcc PR |
987 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
988 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
989 | ||
990 | blk_queue_stack_limits(q, b); | |
991 | ||
992 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
993 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
994 | q->backing_dev_info.ra_pages, | |
995 | b->backing_dev_info.ra_pages); | |
996 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
997 | } | |
998 | put_ldev(mdev); | |
999 | } | |
1000 | } | |
1001 | ||
1002 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
1003 | { | |
1004 | int now, new, local, peer; | |
1005 | ||
1006 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
1007 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1008 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1009 | |
99432fcc PR |
1010 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1011 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
1012 | mdev->local_max_bio_size = local; | |
1013 | put_ldev(mdev); | |
b411b363 | 1014 | } |
99432fcc PR |
1015 | |
1016 | /* We may ignore peer limits if the peer is modern enough. | |
1017 | Because new from 8.3.8 onwards the peer can use multiple | |
1018 | BIOs for a single peer_request */ | |
1019 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1020 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 1021 | peer = mdev->peer_max_bio_size; |
31890f4a | 1022 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
1023 | peer = DRBD_MAX_SIZE_H80_PACKET; |
1024 | else /* drbd 8.3.8 onwards */ | |
1025 | peer = DRBD_MAX_BIO_SIZE; | |
1026 | } | |
1027 | ||
1028 | new = min_t(int, local, peer); | |
1029 | ||
1030 | if (mdev->state.role == R_PRIMARY && new < now) | |
1031 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1032 | ||
1033 | if (new != now) | |
1034 | dev_info(DEV, "max BIO size = %u\n", new); | |
1035 | ||
1036 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1037 | } |
1038 | ||
1039 | /* serialize deconfig (worker exiting, doing cleanup) | |
1040 | * and reconfig (drbdsetup disk, drbdsetup net) | |
1041 | * | |
c518d04f LE |
1042 | * Wait for a potentially exiting worker, then restart it, |
1043 | * or start a new one. Flush any pending work, there may still be an | |
1044 | * after_state_change queued. | |
b411b363 | 1045 | */ |
0e29d163 | 1046 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1047 | { |
0e29d163 PR |
1048 | wait_event(tconn->ping_wait, !test_and_set_bit(CONFIG_PENDING, &tconn->flags)); |
1049 | wait_event(tconn->ping_wait, !test_bit(OBJECT_DYING, &tconn->flags)); | |
1050 | drbd_thread_start(&tconn->worker); | |
1051 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1052 | } |
1053 | ||
1054 | /* if still unconfigured, stops worker again. | |
1055 | * if configured now, clears CONFIG_PENDING. | |
1056 | * wakes potential waiters */ | |
0e29d163 | 1057 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1058 | { |
0e29d163 PR |
1059 | spin_lock_irq(&tconn->req_lock); |
1060 | if (conn_all_vols_unconf(tconn)) { | |
1061 | set_bit(OBJECT_DYING, &tconn->flags); | |
1062 | drbd_thread_stop_nowait(&tconn->worker); | |
b411b363 | 1063 | } else |
0e29d163 PR |
1064 | clear_bit(CONFIG_PENDING, &tconn->flags); |
1065 | spin_unlock_irq(&tconn->req_lock); | |
1066 | wake_up(&tconn->ping_wait); | |
b411b363 PR |
1067 | } |
1068 | ||
0778286a PR |
1069 | /* Make sure IO is suspended before calling this function(). */ |
1070 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1071 | { | |
1072 | int s = 0; | |
1073 | ||
61610420 | 1074 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1075 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1076 | return; | |
1077 | } | |
1078 | ||
61610420 | 1079 | drbd_al_shrink(mdev); |
87eeee41 | 1080 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1081 | if (mdev->state.conn < C_CONNECTED) |
1082 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1083 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1084 | lc_unlock(mdev->act_log); |
0778286a PR |
1085 | |
1086 | if (s) | |
1087 | dev_info(DEV, "Suspended AL updates\n"); | |
1088 | } | |
1089 | ||
f399002e LE |
1090 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1091 | { | |
1092 | enum drbd_ret_code retcode; | |
1093 | struct drbd_conf *mdev; | |
1094 | struct disk_conf *ndc; /* new disk conf */ | |
1095 | int err, fifo_size; | |
1096 | int *rs_plan_s = NULL; | |
1097 | ||
1098 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1099 | if (!adm_ctx.reply_skb) | |
1100 | return retcode; | |
1101 | if (retcode != NO_ERROR) | |
1102 | goto out; | |
1103 | ||
1104 | mdev = adm_ctx.mdev; | |
1105 | ||
1106 | /* we also need a disk | |
1107 | * to change the options on */ | |
1108 | if (!get_ldev(mdev)) { | |
1109 | retcode = ERR_NO_DISK; | |
1110 | goto out; | |
1111 | } | |
1112 | ||
1113 | /* FIXME freeze IO, cluster wide. | |
1114 | * | |
1115 | * We should make sure no-one uses | |
1116 | * some half-updated struct when we | |
1117 | * assign it later. */ | |
1118 | ||
1119 | ndc = kmalloc(sizeof(*ndc), GFP_KERNEL); | |
1120 | if (!ndc) { | |
1121 | retcode = ERR_NOMEM; | |
1122 | goto fail; | |
1123 | } | |
1124 | ||
1125 | memcpy(ndc, &mdev->ldev->dc, sizeof(*ndc)); | |
1126 | err = disk_conf_from_attrs_for_change(ndc, info); | |
1127 | if (err) { | |
1128 | retcode = ERR_MANDATORY_TAG; | |
1129 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1130 | } | |
1131 | ||
1132 | if (!expect(ndc->resync_rate >= 1)) | |
1133 | ndc->resync_rate = 1; | |
1134 | ||
1135 | /* clip to allowed range */ | |
1136 | if (!expect(ndc->al_extents >= DRBD_AL_EXTENTS_MIN)) | |
1137 | ndc->al_extents = DRBD_AL_EXTENTS_MIN; | |
1138 | if (!expect(ndc->al_extents <= DRBD_AL_EXTENTS_MAX)) | |
1139 | ndc->al_extents = DRBD_AL_EXTENTS_MAX; | |
1140 | ||
1141 | /* most sanity checks done, try to assign the new sync-after | |
1142 | * dependency. need to hold the global lock in there, | |
1143 | * to avoid a race in the dependency loop check. */ | |
1144 | retcode = drbd_alter_sa(mdev, ndc->resync_after); | |
1145 | if (retcode != NO_ERROR) | |
1146 | goto fail; | |
1147 | ||
1148 | fifo_size = (ndc->c_plan_ahead * 10 * SLEEP_TIME) / HZ; | |
1149 | if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) { | |
1150 | rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL); | |
1151 | if (!rs_plan_s) { | |
1152 | dev_err(DEV, "kmalloc of fifo_buffer failed"); | |
1153 | retcode = ERR_NOMEM; | |
1154 | goto fail; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | if (fifo_size != mdev->rs_plan_s.size) { | |
1159 | kfree(mdev->rs_plan_s.values); | |
1160 | mdev->rs_plan_s.values = rs_plan_s; | |
1161 | mdev->rs_plan_s.size = fifo_size; | |
1162 | mdev->rs_planed = 0; | |
1163 | rs_plan_s = NULL; | |
1164 | } | |
1165 | ||
1166 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
1167 | drbd_al_shrink(mdev); | |
1168 | err = drbd_check_al_size(mdev, ndc); | |
1169 | lc_unlock(mdev->act_log); | |
1170 | wake_up(&mdev->al_wait); | |
1171 | ||
1172 | if (err) { | |
1173 | retcode = ERR_NOMEM; | |
1174 | goto fail; | |
1175 | } | |
1176 | ||
1177 | /* FIXME | |
1178 | * To avoid someone looking at a half-updated struct, we probably | |
1179 | * should have a rw-semaphor on net_conf and disk_conf. | |
1180 | */ | |
1181 | mdev->ldev->dc = *ndc; | |
1182 | ||
1183 | drbd_md_sync(mdev); | |
1184 | ||
1185 | ||
1186 | if (mdev->state.conn >= C_CONNECTED) | |
1187 | drbd_send_sync_param(mdev); | |
1188 | ||
1189 | fail: | |
1190 | put_ldev(mdev); | |
1191 | kfree(ndc); | |
1192 | kfree(rs_plan_s); | |
1193 | out: | |
1194 | drbd_adm_finish(info, retcode); | |
1195 | return 0; | |
1196 | } | |
1197 | ||
3b98c0c2 | 1198 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1199 | { |
3b98c0c2 LE |
1200 | struct drbd_conf *mdev; |
1201 | int err; | |
116676ca | 1202 | enum drbd_ret_code retcode; |
b411b363 PR |
1203 | enum determine_dev_size dd; |
1204 | sector_t max_possible_sectors; | |
1205 | sector_t min_md_device_sectors; | |
1206 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
e525fd89 | 1207 | struct block_device *bdev; |
b411b363 PR |
1208 | struct lru_cache *resync_lru = NULL; |
1209 | union drbd_state ns, os; | |
f2024e7c | 1210 | enum drbd_state_rv rv; |
44ed167d | 1211 | struct net_conf *nc; |
b411b363 | 1212 | int cp_discovered = 0; |
b411b363 | 1213 | |
3b98c0c2 LE |
1214 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1215 | if (!adm_ctx.reply_skb) | |
1216 | return retcode; | |
1217 | if (retcode != NO_ERROR) | |
40cbf085 | 1218 | goto finish; |
3b98c0c2 LE |
1219 | |
1220 | mdev = adm_ctx.mdev; | |
0e29d163 | 1221 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1222 | |
1223 | /* if you want to reconfigure, please tear down first */ | |
1224 | if (mdev->state.disk > D_DISKLESS) { | |
1225 | retcode = ERR_DISK_CONFIGURED; | |
1226 | goto fail; | |
1227 | } | |
82f59cc6 LE |
1228 | /* It may just now have detached because of IO error. Make sure |
1229 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1230 | * e.g. if someone calls attach from the on-io-error handler, | |
1231 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1232 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1233 | |
3b98c0c2 | 1234 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1235 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1236 | if (!nbc) { | |
1237 | retcode = ERR_NOMEM; | |
1238 | goto fail; | |
1239 | } | |
1240 | ||
f399002e LE |
1241 | nbc->dc = (struct disk_conf) { |
1242 | {}, 0, /* backing_dev */ | |
1243 | {}, 0, /* meta_dev */ | |
1244 | 0, /* meta_dev_idx */ | |
1245 | DRBD_DISK_SIZE_SECT_DEF, /* disk_size */ | |
1246 | DRBD_MAX_BIO_BVECS_DEF, /* max_bio_bvecs */ | |
1247 | DRBD_ON_IO_ERROR_DEF, /* on_io_error */ | |
1248 | DRBD_FENCING_DEF, /* fencing */ | |
1249 | DRBD_RATE_DEF, /* resync_rate */ | |
1250 | DRBD_AFTER_DEF, /* resync_after */ | |
1251 | DRBD_AL_EXTENTS_DEF, /* al_extents */ | |
1252 | DRBD_C_PLAN_AHEAD_DEF, /* c_plan_ahead */ | |
1253 | DRBD_C_DELAY_TARGET_DEF, /* c_delay_target */ | |
1254 | DRBD_C_FILL_TARGET_DEF, /* c_fill_target */ | |
1255 | DRBD_C_MAX_RATE_DEF, /* c_max_rate */ | |
1256 | DRBD_C_MIN_RATE_DEF, /* c_min_rate */ | |
1257 | 0, /* no_disk_barrier */ | |
1258 | 0, /* no_disk_flush */ | |
1259 | 0, /* no_disk_drain */ | |
1260 | 0, /* no_md_flush */ | |
1261 | }; | |
1262 | ||
1263 | err = disk_conf_from_attrs(&nbc->dc, info); | |
3b98c0c2 | 1264 | if (err) { |
b411b363 | 1265 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1266 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1267 | goto fail; |
1268 | } | |
1269 | ||
3b98c0c2 | 1270 | if ((int)nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1271 | retcode = ERR_MD_IDX_INVALID; |
1272 | goto fail; | |
1273 | } | |
1274 | ||
44ed167d PR |
1275 | rcu_read_lock(); |
1276 | nc = rcu_dereference(mdev->tconn->net_conf); | |
1277 | if (nc) { | |
1278 | if (nbc->dc.fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { | |
1279 | rcu_read_unlock(); | |
47ff2d0a PR |
1280 | retcode = ERR_STONITH_AND_PROT_A; |
1281 | goto fail; | |
1282 | } | |
1283 | } | |
44ed167d | 1284 | rcu_read_unlock(); |
47ff2d0a | 1285 | |
d4d77629 TH |
1286 | bdev = blkdev_get_by_path(nbc->dc.backing_dev, |
1287 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); | |
e525fd89 | 1288 | if (IS_ERR(bdev)) { |
b411b363 | 1289 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev, |
e525fd89 | 1290 | PTR_ERR(bdev)); |
b411b363 PR |
1291 | retcode = ERR_OPEN_DISK; |
1292 | goto fail; | |
1293 | } | |
e525fd89 TH |
1294 | nbc->backing_bdev = bdev; |
1295 | ||
1296 | /* | |
1297 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1298 | * drbd sharing one meta device. TODO in that case, paranoia | |
1299 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1300 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1301 | * should check it for you already; but if you don't, or | |
1302 | * someone fooled it, we need to double check here) | |
1303 | */ | |
d4d77629 TH |
1304 | bdev = blkdev_get_by_path(nbc->dc.meta_dev, |
1305 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
3b98c0c2 | 1306 | ((int)nbc->dc.meta_dev_idx < 0) ? |
d4d77629 | 1307 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1308 | if (IS_ERR(bdev)) { |
b411b363 | 1309 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev, |
e525fd89 | 1310 | PTR_ERR(bdev)); |
b411b363 PR |
1311 | retcode = ERR_OPEN_MD_DISK; |
1312 | goto fail; | |
1313 | } | |
e525fd89 | 1314 | nbc->md_bdev = bdev; |
b411b363 | 1315 | |
e525fd89 TH |
1316 | if ((nbc->backing_bdev == nbc->md_bdev) != |
1317 | (nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL || | |
1318 | nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
1319 | retcode = ERR_MD_IDX_INVALID; | |
b411b363 PR |
1320 | goto fail; |
1321 | } | |
1322 | ||
1323 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1324 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1325 | offsetof(struct bm_extent, lce)); |
1326 | if (!resync_lru) { | |
1327 | retcode = ERR_NOMEM; | |
e525fd89 | 1328 | goto fail; |
b411b363 PR |
1329 | } |
1330 | ||
1331 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1332 | drbd_md_set_sector_offsets(mdev, nbc); | |
1333 | ||
1334 | if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) { | |
1335 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", | |
1336 | (unsigned long long) drbd_get_max_capacity(nbc), | |
1337 | (unsigned long long) nbc->dc.disk_size); | |
1338 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1339 | goto fail; |
b411b363 PR |
1340 | } |
1341 | ||
3b98c0c2 | 1342 | if ((int)nbc->dc.meta_dev_idx < 0) { |
b411b363 PR |
1343 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1344 | /* at least one MB, otherwise it does not make sense */ | |
1345 | min_md_device_sectors = (2<<10); | |
1346 | } else { | |
1347 | max_possible_sectors = DRBD_MAX_SECTORS; | |
1348 | min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1); | |
1349 | } | |
1350 | ||
b411b363 PR |
1351 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
1352 | retcode = ERR_MD_DISK_TO_SMALL; | |
1353 | dev_warn(DEV, "refusing attach: md-device too small, " | |
1354 | "at least %llu sectors needed for this meta-disk type\n", | |
1355 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1356 | goto fail; |
b411b363 PR |
1357 | } |
1358 | ||
1359 | /* Make sure the new disk is big enough | |
1360 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1361 | if (drbd_get_max_capacity(nbc) < | |
1362 | drbd_get_capacity(mdev->this_bdev)) { | |
1363 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1364 | goto fail; |
b411b363 PR |
1365 | } |
1366 | ||
1367 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1368 | ||
1352994b LE |
1369 | if (nbc->known_size > max_possible_sectors) { |
1370 | dev_warn(DEV, "==> truncating very big lower level device " | |
1371 | "to currently maximum possible %llu sectors <==\n", | |
1372 | (unsigned long long) max_possible_sectors); | |
3b98c0c2 | 1373 | if ((int)nbc->dc.meta_dev_idx >= 0) |
1352994b LE |
1374 | dev_warn(DEV, "==>> using internal or flexible " |
1375 | "meta data may help <<==\n"); | |
1376 | } | |
1377 | ||
b411b363 PR |
1378 | drbd_suspend_io(mdev); |
1379 | /* also wait for the last barrier ack. */ | |
2aebfabb | 1380 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 | 1381 | /* and for any other previously queued work */ |
a21e9298 | 1382 | drbd_flush_workqueue(mdev); |
b411b363 | 1383 | |
f2024e7c AG |
1384 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1385 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1386 | drbd_resume_io(mdev); |
f2024e7c | 1387 | if (rv < SS_SUCCESS) |
e525fd89 | 1388 | goto fail; |
b411b363 PR |
1389 | |
1390 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1391 | goto force_diskless; | |
1392 | ||
1393 | drbd_md_set_sector_offsets(mdev, nbc); | |
1394 | ||
1395 | if (!mdev->bitmap) { | |
1396 | if (drbd_bm_init(mdev)) { | |
1397 | retcode = ERR_NOMEM; | |
1398 | goto force_diskless_dec; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | retcode = drbd_md_read(mdev, nbc); | |
1403 | if (retcode != NO_ERROR) | |
1404 | goto force_diskless_dec; | |
1405 | ||
1406 | if (mdev->state.conn < C_CONNECTED && | |
1407 | mdev->state.role == R_PRIMARY && | |
1408 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1409 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1410 | (unsigned long long)mdev->ed_uuid); | |
1411 | retcode = ERR_DATA_NOT_CURRENT; | |
1412 | goto force_diskless_dec; | |
1413 | } | |
1414 | ||
1415 | /* Since we are diskless, fix the activity log first... */ | |
f399002e | 1416 | if (drbd_check_al_size(mdev, &nbc->dc)) { |
b411b363 PR |
1417 | retcode = ERR_NOMEM; |
1418 | goto force_diskless_dec; | |
1419 | } | |
1420 | ||
1421 | /* Prevent shrinking of consistent devices ! */ | |
1422 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
a393db6f | 1423 | drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) { |
b411b363 PR |
1424 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
1425 | retcode = ERR_DISK_TO_SMALL; | |
1426 | goto force_diskless_dec; | |
1427 | } | |
1428 | ||
1429 | if (!drbd_al_read_log(mdev, nbc)) { | |
1430 | retcode = ERR_IO_MD_DISK; | |
1431 | goto force_diskless_dec; | |
1432 | } | |
1433 | ||
b411b363 PR |
1434 | /* Reset the "barriers don't work" bits here, then force meta data to |
1435 | * be written, to ensure we determine if barriers are supported. */ | |
1436 | if (nbc->dc.no_md_flush) | |
a8a4e51e | 1437 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1438 | else |
a8a4e51e | 1439 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1440 | |
1441 | /* Point of no return reached. | |
1442 | * Devices and memory are no longer released by error cleanup below. | |
1443 | * now mdev takes over responsibility, and the state engine should | |
1444 | * clean it up somewhere. */ | |
1445 | D_ASSERT(mdev->ldev == NULL); | |
1446 | mdev->ldev = nbc; | |
1447 | mdev->resync = resync_lru; | |
1448 | nbc = NULL; | |
1449 | resync_lru = NULL; | |
1450 | ||
2451fc3b PR |
1451 | mdev->write_ordering = WO_bdev_flush; |
1452 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1453 | |
1454 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1455 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1456 | else | |
1457 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1458 | ||
894c6a94 | 1459 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
da9fbc27 | 1460 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) { |
b411b363 PR |
1461 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1462 | cp_discovered = 1; | |
1463 | } | |
1464 | ||
1465 | mdev->send_cnt = 0; | |
1466 | mdev->recv_cnt = 0; | |
1467 | mdev->read_cnt = 0; | |
1468 | mdev->writ_cnt = 0; | |
1469 | ||
99432fcc | 1470 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1471 | |
1472 | /* If I am currently not R_PRIMARY, | |
1473 | * but meta data primary indicator is set, | |
1474 | * I just now recover from a hard crash, | |
1475 | * and have been R_PRIMARY before that crash. | |
1476 | * | |
1477 | * Now, if I had no connection before that crash | |
1478 | * (have been degraded R_PRIMARY), chances are that | |
1479 | * I won't find my peer now either. | |
1480 | * | |
1481 | * In that case, and _only_ in that case, | |
1482 | * we use the degr-wfc-timeout instead of the default, | |
1483 | * so we can automatically recover from a crash of a | |
1484 | * degraded but active "cluster" after a certain timeout. | |
1485 | */ | |
1486 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1487 | if (mdev->state.role != R_PRIMARY && | |
1488 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1489 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1490 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1491 | ||
24c4830c | 1492 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1493 | if (dd == dev_size_error) { |
1494 | retcode = ERR_NOMEM_BITMAP; | |
1495 | goto force_diskless_dec; | |
1496 | } else if (dd == grew) | |
1497 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1498 | ||
1499 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1500 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1501 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1502 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1503 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1504 | retcode = ERR_IO_MD_DISK; |
1505 | goto force_diskless_dec; | |
1506 | } | |
1507 | } else { | |
20ceb2b2 | 1508 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1509 | "read from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1510 | retcode = ERR_IO_MD_DISK; |
1511 | goto force_diskless_dec; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | if (cp_discovered) { | |
1516 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1517 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1518 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1519 | retcode = ERR_IO_MD_DISK; |
1520 | goto force_diskless_dec; | |
1521 | } | |
b411b363 PR |
1522 | } |
1523 | ||
0778286a PR |
1524 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1525 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1526 | ||
87eeee41 | 1527 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1528 | os = drbd_read_state(mdev); |
1529 | ns = os; | |
b411b363 PR |
1530 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1531 | otherwise investigate MDF_WasUpToDate... | |
1532 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1533 | otherwise into D_CONSISTENT state. | |
1534 | */ | |
1535 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1536 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1537 | ns.disk = D_CONSISTENT; | |
1538 | else | |
1539 | ns.disk = D_OUTDATED; | |
1540 | } else { | |
1541 | ns.disk = D_INCONSISTENT; | |
1542 | } | |
1543 | ||
1544 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1545 | ns.pdsk = D_OUTDATED; | |
1546 | ||
1547 | if ( ns.disk == D_CONSISTENT && | |
1548 | (ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE)) | |
1549 | ns.disk = D_UP_TO_DATE; | |
1550 | ||
1551 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1552 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1553 | this point, because drbd_request_state() modifies these | |
1554 | flags. */ | |
1555 | ||
1556 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1557 | state after the negotiation phase. */ | |
1558 | if (mdev->state.conn == C_CONNECTED) { | |
1559 | mdev->new_state_tmp.i = ns.i; | |
1560 | ns.i = os.i; | |
1561 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1562 | |
1563 | /* We expect to receive up-to-date UUIDs soon. | |
1564 | To avoid a race in receive_state, free p_uuid while | |
1565 | holding req_lock. I.e. atomic with the state change */ | |
1566 | kfree(mdev->p_uuid); | |
1567 | mdev->p_uuid = NULL; | |
b411b363 PR |
1568 | } |
1569 | ||
1570 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1571 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1572 | |
1573 | if (rv < SS_SUCCESS) | |
1574 | goto force_diskless_dec; | |
1575 | ||
1576 | if (mdev->state.role == R_PRIMARY) | |
1577 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1578 | else | |
1579 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1580 | ||
1581 | drbd_md_mark_dirty(mdev); | |
1582 | drbd_md_sync(mdev); | |
1583 | ||
1584 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1585 | put_ldev(mdev); | |
0e29d163 | 1586 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1587 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1588 | return 0; |
1589 | ||
1590 | force_diskless_dec: | |
1591 | put_ldev(mdev); | |
1592 | force_diskless: | |
82f59cc6 | 1593 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1594 | drbd_md_sync(mdev); |
b411b363 | 1595 | fail: |
40cbf085 | 1596 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1597 | if (nbc) { |
e525fd89 TH |
1598 | if (nbc->backing_bdev) |
1599 | blkdev_put(nbc->backing_bdev, | |
1600 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1601 | if (nbc->md_bdev) | |
1602 | blkdev_put(nbc->md_bdev, | |
1603 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1604 | kfree(nbc); |
1605 | } | |
1606 | lc_destroy(resync_lru); | |
1607 | ||
40cbf085 | 1608 | finish: |
3b98c0c2 | 1609 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1610 | return 0; |
1611 | } | |
1612 | ||
85f75dd7 LE |
1613 | static int adm_detach(struct drbd_conf *mdev) |
1614 | { | |
19f83c76 | 1615 | enum drbd_state_rv retcode; |
85f75dd7 LE |
1616 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
1617 | retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS)); | |
1618 | wait_event(mdev->misc_wait, | |
1619 | mdev->state.disk != D_DISKLESS || | |
1620 | !atomic_read(&mdev->local_cnt)); | |
1621 | drbd_resume_io(mdev); | |
1622 | return retcode; | |
1623 | } | |
1624 | ||
82f59cc6 LE |
1625 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1626 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1627 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1628 | * internal references as well. | |
1629 | * Only then we have finally detached. */ | |
3b98c0c2 | 1630 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1631 | { |
9a0d9d03 | 1632 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1633 | |
1634 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1635 | if (!adm_ctx.reply_skb) | |
1636 | return retcode; | |
1637 | if (retcode != NO_ERROR) | |
1638 | goto out; | |
1639 | ||
85f75dd7 | 1640 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1641 | out: |
1642 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1643 | return 0; |
1644 | } | |
1645 | ||
f399002e LE |
1646 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1647 | { | |
1648 | struct drbd_conf *mdev; | |
695d08fa | 1649 | bool rv = false; |
f399002e LE |
1650 | int vnr; |
1651 | ||
695d08fa | 1652 | rcu_read_lock(); |
f399002e LE |
1653 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1654 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1655 | mdev->state.conn == C_SYNC_TARGET || | |
1656 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1657 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1658 | rv = true; | |
1659 | break; | |
1660 | } | |
f399002e | 1661 | } |
695d08fa PR |
1662 | rcu_read_unlock(); |
1663 | ||
1664 | return rv; | |
f399002e LE |
1665 | } |
1666 | ||
1667 | static bool conn_ov_running(struct drbd_tconn *tconn) | |
1668 | { | |
1669 | struct drbd_conf *mdev; | |
695d08fa | 1670 | bool rv = false; |
f399002e LE |
1671 | int vnr; |
1672 | ||
695d08fa | 1673 | rcu_read_lock(); |
f399002e LE |
1674 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1675 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1676 | mdev->state.conn == C_VERIFY_T) { |
1677 | rv = true; | |
1678 | break; | |
1679 | } | |
f399002e | 1680 | } |
695d08fa PR |
1681 | rcu_read_unlock(); |
1682 | ||
1683 | return rv; | |
f399002e LE |
1684 | } |
1685 | ||
cd64397c | 1686 | static enum drbd_ret_code |
44ed167d | 1687 | _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf) |
cd64397c PR |
1688 | { |
1689 | struct drbd_conf *mdev; | |
1690 | int i; | |
1691 | ||
44ed167d | 1692 | if (old_conf && tconn->agreed_pro_version < 100 && |
b032b6fa | 1693 | tconn->cstate == C_WF_REPORT_PARAMS && |
44ed167d | 1694 | new_conf->wire_protocol != old_conf->wire_protocol) |
b032b6fa PR |
1695 | return ERR_NEED_APV_100; |
1696 | ||
cd64397c PR |
1697 | if (new_conf->two_primaries && |
1698 | (new_conf->wire_protocol != DRBD_PROT_C)) | |
1699 | return ERR_NOT_PROTO_C; | |
1700 | ||
cd64397c PR |
1701 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1702 | if (get_ldev(mdev)) { | |
1703 | enum drbd_fencing_p fp = mdev->ldev->dc.fencing; | |
1704 | put_ldev(mdev); | |
44ed167d | 1705 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 1706 | return ERR_STONITH_AND_PROT_A; |
cd64397c | 1707 | } |
44ed167d | 1708 | if (mdev->state.role == R_PRIMARY && new_conf->want_lose) |
cd64397c | 1709 | return ERR_DISCARD; |
cd64397c | 1710 | } |
cd64397c PR |
1711 | |
1712 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) | |
1713 | return ERR_CONG_NOT_PROTO_A; | |
1714 | ||
1715 | return NO_ERROR; | |
1716 | } | |
1717 | ||
44ed167d PR |
1718 | static enum drbd_ret_code |
1719 | check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf) | |
1720 | { | |
1721 | static enum drbd_ret_code rv; | |
1722 | struct drbd_conf *mdev; | |
1723 | int i; | |
1724 | ||
1725 | rcu_read_lock(); | |
1726 | rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf); | |
1727 | rcu_read_unlock(); | |
1728 | ||
1729 | /* tconn->volumes protected by genl_lock() here */ | |
1730 | idr_for_each_entry(&tconn->volumes, mdev, i) { | |
1731 | if (!mdev->bitmap) { | |
1732 | if(drbd_bm_init(mdev)) | |
1733 | return ERR_NOMEM; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | return rv; | |
1738 | } | |
1739 | ||
f399002e LE |
1740 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
1741 | { | |
1742 | enum drbd_ret_code retcode; | |
1743 | struct drbd_tconn *tconn; | |
44ed167d | 1744 | struct net_conf *old_conf, *new_conf = NULL; |
f399002e LE |
1745 | int err; |
1746 | int ovr; /* online verify running */ | |
1747 | int rsr; /* re-sync running */ | |
1748 | struct crypto_hash *verify_tfm = NULL; | |
1749 | struct crypto_hash *csums_tfm = NULL; | |
1750 | ||
1751 | ||
1752 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); | |
1753 | if (!adm_ctx.reply_skb) | |
1754 | return retcode; | |
1755 | if (retcode != NO_ERROR) | |
1756 | goto out; | |
1757 | ||
1758 | tconn = adm_ctx.tconn; | |
1759 | ||
1760 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); | |
1761 | if (!new_conf) { | |
1762 | retcode = ERR_NOMEM; | |
1763 | goto out; | |
1764 | } | |
1765 | ||
44ed167d PR |
1766 | conn_reconfig_start(tconn); |
1767 | ||
91fd4dad PR |
1768 | mutex_lock(&tconn->net_conf_update); |
1769 | old_conf = tconn->net_conf; | |
44ed167d PR |
1770 | |
1771 | if (!old_conf) { | |
f399002e LE |
1772 | drbd_msg_put_info("net conf missing, try connect"); |
1773 | retcode = ERR_INVALID_REQUEST; | |
91fd4dad | 1774 | goto fail; |
f399002e LE |
1775 | } |
1776 | ||
44ed167d | 1777 | *new_conf = *old_conf; |
f399002e | 1778 | |
f399002e LE |
1779 | err = net_conf_from_attrs_for_change(new_conf, info); |
1780 | if (err) { | |
1781 | retcode = ERR_MANDATORY_TAG; | |
1782 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1783 | goto fail; | |
1784 | } | |
1785 | ||
cd64397c PR |
1786 | retcode = check_net_options(tconn, new_conf); |
1787 | if (retcode != NO_ERROR) | |
1788 | goto fail; | |
1789 | ||
f399002e LE |
1790 | /* re-sync running */ |
1791 | rsr = conn_resync_running(tconn); | |
44ed167d | 1792 | if (rsr && old_conf && strcmp(new_conf->csums_alg, old_conf->csums_alg)) { |
f399002e | 1793 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 1794 | goto fail; |
f399002e LE |
1795 | } |
1796 | ||
1797 | if (!rsr && new_conf->csums_alg[0]) { | |
1798 | csums_tfm = crypto_alloc_hash(new_conf->csums_alg, 0, CRYPTO_ALG_ASYNC); | |
1799 | if (IS_ERR(csums_tfm)) { | |
1800 | csums_tfm = NULL; | |
1801 | retcode = ERR_CSUMS_ALG; | |
1802 | goto fail; | |
1803 | } | |
1804 | ||
1805 | if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) { | |
1806 | retcode = ERR_CSUMS_ALG_ND; | |
1807 | goto fail; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | /* online verify running */ | |
1812 | ovr = conn_ov_running(tconn); | |
91fd4dad | 1813 | if (ovr) { |
44ed167d | 1814 | if (strcmp(new_conf->verify_alg, old_conf->verify_alg)) { |
f399002e | 1815 | retcode = ERR_VERIFY_RUNNING; |
91fd4dad | 1816 | goto fail; |
f399002e LE |
1817 | } |
1818 | } | |
1819 | ||
1820 | if (!ovr && new_conf->verify_alg[0]) { | |
1821 | verify_tfm = crypto_alloc_hash(new_conf->verify_alg, 0, CRYPTO_ALG_ASYNC); | |
1822 | if (IS_ERR(verify_tfm)) { | |
1823 | verify_tfm = NULL; | |
1824 | retcode = ERR_VERIFY_ALG; | |
1825 | goto fail; | |
1826 | } | |
1827 | ||
1828 | if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) { | |
1829 | retcode = ERR_VERIFY_ALG_ND; | |
1830 | goto fail; | |
1831 | } | |
1832 | } | |
1833 | ||
44ed167d | 1834 | rcu_assign_pointer(tconn->net_conf, new_conf); |
f399002e LE |
1835 | |
1836 | if (!rsr) { | |
1837 | crypto_free_hash(tconn->csums_tfm); | |
1838 | tconn->csums_tfm = csums_tfm; | |
1839 | csums_tfm = NULL; | |
1840 | } | |
1841 | if (!ovr) { | |
1842 | crypto_free_hash(tconn->verify_tfm); | |
1843 | tconn->verify_tfm = verify_tfm; | |
1844 | verify_tfm = NULL; | |
1845 | } | |
1846 | ||
91fd4dad PR |
1847 | mutex_unlock(&tconn->net_conf_update); |
1848 | synchronize_rcu(); | |
1849 | kfree(old_conf); | |
1850 | ||
f399002e LE |
1851 | if (tconn->cstate >= C_WF_REPORT_PARAMS) |
1852 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
1853 | ||
91fd4dad PR |
1854 | goto done; |
1855 | ||
f399002e | 1856 | fail: |
91fd4dad | 1857 | mutex_unlock(&tconn->net_conf_update); |
f399002e LE |
1858 | crypto_free_hash(csums_tfm); |
1859 | crypto_free_hash(verify_tfm); | |
1860 | kfree(new_conf); | |
91fd4dad | 1861 | done: |
f399002e LE |
1862 | conn_reconfig_done(tconn); |
1863 | out: | |
1864 | drbd_adm_finish(info, retcode); | |
1865 | return 0; | |
1866 | } | |
1867 | ||
3b98c0c2 | 1868 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1869 | { |
3b98c0c2 LE |
1870 | char hmac_name[CRYPTO_MAX_ALG_NAME]; |
1871 | struct drbd_conf *mdev; | |
44ed167d | 1872 | struct net_conf *old_conf, *new_conf = NULL; |
b411b363 PR |
1873 | struct crypto_hash *tfm = NULL; |
1874 | struct crypto_hash *integrity_w_tfm = NULL; | |
1875 | struct crypto_hash *integrity_r_tfm = NULL; | |
b411b363 PR |
1876 | void *int_dig_in = NULL; |
1877 | void *int_dig_vv = NULL; | |
80883197 | 1878 | struct drbd_tconn *oconn; |
3b98c0c2 | 1879 | struct drbd_tconn *tconn; |
b411b363 | 1880 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1881 | enum drbd_ret_code retcode; |
1882 | int i; | |
1883 | int err; | |
b411b363 | 1884 | |
3b98c0c2 LE |
1885 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1886 | if (!adm_ctx.reply_skb) | |
1887 | return retcode; | |
1888 | if (retcode != NO_ERROR) | |
1889 | goto out; | |
1890 | ||
1891 | tconn = adm_ctx.tconn; | |
80883197 | 1892 | conn_reconfig_start(tconn); |
b411b363 | 1893 | |
80883197 | 1894 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
1895 | retcode = ERR_NET_CONFIGURED; |
1896 | goto fail; | |
1897 | } | |
1898 | ||
1899 | /* allocation not in the IO path, cqueue thread context */ | |
f399002e | 1900 | new_conf = kmalloc(sizeof(struct net_conf), GFP_KERNEL); |
b411b363 PR |
1901 | if (!new_conf) { |
1902 | retcode = ERR_NOMEM; | |
1903 | goto fail; | |
1904 | } | |
1905 | ||
f399002e LE |
1906 | *new_conf = (struct net_conf) { |
1907 | {}, 0, /* my_addr */ | |
1908 | {}, 0, /* peer_addr */ | |
1909 | {}, 0, /* shared_secret */ | |
1910 | {}, 0, /* cram_hmac_alg */ | |
1911 | {}, 0, /* integrity_alg */ | |
1912 | {}, 0, /* verify_alg */ | |
1913 | {}, 0, /* csums_alg */ | |
1914 | DRBD_PROTOCOL_DEF, /* wire_protocol */ | |
1915 | DRBD_CONNECT_INT_DEF, /* try_connect_int */ | |
1916 | DRBD_TIMEOUT_DEF, /* timeout */ | |
1917 | DRBD_PING_INT_DEF, /* ping_int */ | |
1918 | DRBD_PING_TIMEO_DEF, /* ping_timeo */ | |
1919 | DRBD_SNDBUF_SIZE_DEF, /* sndbuf_size */ | |
1920 | DRBD_RCVBUF_SIZE_DEF, /* rcvbuf_size */ | |
1921 | DRBD_KO_COUNT_DEF, /* ko_count */ | |
1922 | DRBD_MAX_BUFFERS_DEF, /* max_buffers */ | |
1923 | DRBD_MAX_EPOCH_SIZE_DEF, /* max_epoch_size */ | |
1924 | DRBD_UNPLUG_WATERMARK_DEF, /* unplug_watermark */ | |
1925 | DRBD_AFTER_SB_0P_DEF, /* after_sb_0p */ | |
1926 | DRBD_AFTER_SB_1P_DEF, /* after_sb_1p */ | |
1927 | DRBD_AFTER_SB_2P_DEF, /* after_sb_2p */ | |
1928 | DRBD_RR_CONFLICT_DEF, /* rr_conflict */ | |
1929 | DRBD_ON_CONGESTION_DEF, /* on_congestion */ | |
1930 | DRBD_CONG_FILL_DEF, /* cong_fill */ | |
1931 | DRBD_CONG_EXTENTS_DEF, /* cong_extents */ | |
1932 | 0, /* two_primaries */ | |
1933 | 0, /* want_lose */ | |
1934 | 0, /* no_cork */ | |
1935 | 0, /* always_asbp */ | |
1936 | 0, /* dry_run */ | |
1937 | 0, /* use_rle */ | |
1938 | }; | |
1939 | ||
1940 | err = net_conf_from_attrs(new_conf, info); | |
3b98c0c2 | 1941 | if (err) { |
b411b363 | 1942 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1943 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1944 | goto fail; |
1945 | } | |
1946 | ||
cd64397c PR |
1947 | retcode = check_net_options(tconn, new_conf); |
1948 | if (retcode != NO_ERROR) | |
422028b1 | 1949 | goto fail; |
422028b1 | 1950 | |
b411b363 PR |
1951 | retcode = NO_ERROR; |
1952 | ||
1953 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
1954 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b | 1955 | |
ef356262 | 1956 | /* No need to take drbd_cfg_rwsem here. All reconfiguration is |
543cc10b LE |
1957 | * strictly serialized on genl_lock(). We are protected against |
1958 | * concurrent reconfiguration/addition/deletion */ | |
80883197 | 1959 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
44ed167d | 1960 | struct net_conf *nc; |
80883197 | 1961 | if (oconn == tconn) |
b411b363 | 1962 | continue; |
44ed167d PR |
1963 | |
1964 | rcu_read_lock(); | |
1965 | nc = rcu_dereference(oconn->net_conf); | |
1966 | if (nc) { | |
1967 | taken_addr = (struct sockaddr *)&nc->my_addr; | |
1968 | if (new_conf->my_addr_len == nc->my_addr_len && | |
b411b363 PR |
1969 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
1970 | retcode = ERR_LOCAL_ADDR; | |
1971 | ||
44ed167d PR |
1972 | taken_addr = (struct sockaddr *)&nc->peer_addr; |
1973 | if (new_conf->peer_addr_len == nc->peer_addr_len && | |
b411b363 PR |
1974 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
1975 | retcode = ERR_PEER_ADDR; | |
b411b363 | 1976 | } |
44ed167d PR |
1977 | rcu_read_unlock(); |
1978 | if (retcode != NO_ERROR) | |
1979 | goto fail; | |
b411b363 PR |
1980 | } |
1981 | ||
1982 | if (new_conf->cram_hmac_alg[0] != 0) { | |
1983 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1984 | new_conf->cram_hmac_alg); | |
1985 | tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC); | |
1986 | if (IS_ERR(tfm)) { | |
1987 | tfm = NULL; | |
1988 | retcode = ERR_AUTH_ALG; | |
1989 | goto fail; | |
1990 | } | |
1991 | ||
0798219f | 1992 | if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) { |
b411b363 PR |
1993 | retcode = ERR_AUTH_ALG_ND; |
1994 | goto fail; | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | if (new_conf->integrity_alg[0]) { | |
1999 | integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
2000 | if (IS_ERR(integrity_w_tfm)) { | |
2001 | integrity_w_tfm = NULL; | |
2002 | retcode=ERR_INTEGRITY_ALG; | |
2003 | goto fail; | |
2004 | } | |
2005 | ||
2006 | if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) { | |
2007 | retcode=ERR_INTEGRITY_ALG_ND; | |
2008 | goto fail; | |
2009 | } | |
2010 | ||
2011 | integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
2012 | if (IS_ERR(integrity_r_tfm)) { | |
2013 | integrity_r_tfm = NULL; | |
2014 | retcode=ERR_INTEGRITY_ALG; | |
2015 | goto fail; | |
2016 | } | |
2017 | } | |
2018 | ||
b411b363 PR |
2019 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
2020 | ||
80883197 | 2021 | /* allocation not in the IO path, cqueue thread context */ |
b411b363 PR |
2022 | if (integrity_w_tfm) { |
2023 | i = crypto_hash_digestsize(integrity_w_tfm); | |
b411b363 PR |
2024 | int_dig_in = kmalloc(i, GFP_KERNEL); |
2025 | if (!int_dig_in) { | |
2026 | retcode = ERR_NOMEM; | |
2027 | goto fail; | |
2028 | } | |
2029 | int_dig_vv = kmalloc(i, GFP_KERNEL); | |
2030 | if (!int_dig_vv) { | |
2031 | retcode = ERR_NOMEM; | |
2032 | goto fail; | |
2033 | } | |
2034 | } | |
2035 | ||
80883197 | 2036 | conn_flush_workqueue(tconn); |
91fd4dad PR |
2037 | |
2038 | mutex_lock(&tconn->net_conf_update); | |
2039 | old_conf = tconn->net_conf; | |
2040 | if (old_conf) { | |
b411b363 | 2041 | retcode = ERR_NET_CONFIGURED; |
91fd4dad | 2042 | mutex_unlock(&tconn->net_conf_update); |
b411b363 PR |
2043 | goto fail; |
2044 | } | |
44ed167d | 2045 | rcu_assign_pointer(tconn->net_conf, new_conf); |
b411b363 | 2046 | |
91fd4dad | 2047 | conn_free_crypto(tconn); |
80883197 | 2048 | tconn->cram_hmac_tfm = tfm; |
80883197 | 2049 | tconn->integrity_w_tfm = integrity_w_tfm; |
80883197 | 2050 | tconn->integrity_r_tfm = integrity_r_tfm; |
91fd4dad PR |
2051 | tconn->int_dig_in = int_dig_in; |
2052 | tconn->int_dig_vv = int_dig_vv; | |
b411b363 | 2053 | |
91fd4dad PR |
2054 | mutex_unlock(&tconn->net_conf_update); |
2055 | ||
2056 | retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
b411b363 | 2057 | |
695d08fa | 2058 | rcu_read_lock(); |
80883197 PR |
2059 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2060 | mdev->send_cnt = 0; | |
2061 | mdev->recv_cnt = 0; | |
2062 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
2063 | } | |
695d08fa | 2064 | rcu_read_unlock(); |
80883197 | 2065 | conn_reconfig_done(tconn); |
3b98c0c2 | 2066 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2067 | return 0; |
2068 | ||
2069 | fail: | |
b411b363 PR |
2070 | kfree(int_dig_in); |
2071 | kfree(int_dig_vv); | |
2072 | crypto_free_hash(tfm); | |
2073 | crypto_free_hash(integrity_w_tfm); | |
2074 | crypto_free_hash(integrity_r_tfm); | |
b411b363 PR |
2075 | kfree(new_conf); |
2076 | ||
80883197 | 2077 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2078 | out: |
2079 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2080 | return 0; |
2081 | } | |
2082 | ||
85f75dd7 LE |
2083 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2084 | { | |
2085 | enum drbd_state_rv rv; | |
2086 | if (force) { | |
2087 | spin_lock_irq(&tconn->req_lock); | |
2088 | if (tconn->cstate >= C_WF_CONNECTION) | |
2089 | _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
2090 | spin_unlock_irq(&tconn->req_lock); | |
2091 | return SS_SUCCESS; | |
2092 | } | |
2093 | ||
2094 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), 0); | |
2095 | ||
2096 | switch (rv) { | |
2097 | case SS_NOTHING_TO_DO: | |
2098 | case SS_ALREADY_STANDALONE: | |
2099 | return SS_SUCCESS; | |
2100 | case SS_PRIMARY_NOP: | |
2101 | /* Our state checking code wants to see the peer outdated. */ | |
2102 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2103 | pdsk, D_OUTDATED), CS_VERBOSE); | |
2104 | break; | |
2105 | case SS_CW_FAILED_BY_PEER: | |
2106 | /* The peer probably wants to see us outdated. */ | |
2107 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2108 | disk, D_OUTDATED), 0); | |
2109 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
2110 | conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
2111 | rv = SS_SUCCESS; | |
2112 | } | |
2113 | break; | |
2114 | default:; | |
2115 | /* no special handling necessary */ | |
2116 | } | |
2117 | ||
2118 | return rv; | |
2119 | } | |
2120 | ||
3b98c0c2 | 2121 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2122 | { |
3b98c0c2 LE |
2123 | struct disconnect_parms parms; |
2124 | struct drbd_tconn *tconn; | |
85f75dd7 | 2125 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2126 | enum drbd_ret_code retcode; |
2127 | int err; | |
2561b9c1 | 2128 | |
3b98c0c2 LE |
2129 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2130 | if (!adm_ctx.reply_skb) | |
2131 | return retcode; | |
2132 | if (retcode != NO_ERROR) | |
2561b9c1 | 2133 | goto fail; |
3b98c0c2 LE |
2134 | |
2135 | tconn = adm_ctx.tconn; | |
2136 | memset(&parms, 0, sizeof(parms)); | |
2137 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2138 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2139 | if (err) { |
2140 | retcode = ERR_MANDATORY_TAG; | |
2141 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2142 | goto fail; | |
2143 | } | |
2561b9c1 PR |
2144 | } |
2145 | ||
85f75dd7 LE |
2146 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2147 | if (rv < SS_SUCCESS) | |
b411b363 PR |
2148 | goto fail; |
2149 | ||
df24aa45 PR |
2150 | if (wait_event_interruptible(tconn->ping_wait, |
2151 | tconn->cstate != C_DISCONNECTING)) { | |
b411b363 PR |
2152 | /* Do not test for mdev->state.conn == C_STANDALONE, since |
2153 | someone else might connect us in the mean time! */ | |
2154 | retcode = ERR_INTR; | |
2155 | goto fail; | |
2156 | } | |
2157 | ||
b411b363 PR |
2158 | retcode = NO_ERROR; |
2159 | fail: | |
3b98c0c2 | 2160 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2161 | return 0; |
2162 | } | |
2163 | ||
2164 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2165 | { | |
2166 | int iass; /* I am sync source */ | |
2167 | ||
2168 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2169 | if (mdev->state.role != mdev->state.peer) | |
2170 | iass = (mdev->state.role == R_PRIMARY); | |
2171 | else | |
25703f83 | 2172 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
2173 | |
2174 | if (iass) | |
2175 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2176 | else | |
2177 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2178 | } | |
2179 | ||
3b98c0c2 | 2180 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2181 | { |
3b98c0c2 LE |
2182 | struct resize_parms rs; |
2183 | struct drbd_conf *mdev; | |
2184 | enum drbd_ret_code retcode; | |
b411b363 | 2185 | enum determine_dev_size dd; |
6495d2c6 | 2186 | enum dds_flags ddsf; |
3b98c0c2 | 2187 | int err; |
b411b363 | 2188 | |
3b98c0c2 LE |
2189 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2190 | if (!adm_ctx.reply_skb) | |
2191 | return retcode; | |
2192 | if (retcode != NO_ERROR) | |
b411b363 | 2193 | goto fail; |
3b98c0c2 LE |
2194 | |
2195 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2196 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2197 | err = resize_parms_from_attrs(&rs, info); |
3b98c0c2 LE |
2198 | if (err) { |
2199 | retcode = ERR_MANDATORY_TAG; | |
2200 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2201 | goto fail; | |
2202 | } | |
b411b363 PR |
2203 | } |
2204 | ||
3b98c0c2 | 2205 | mdev = adm_ctx.mdev; |
b411b363 PR |
2206 | if (mdev->state.conn > C_CONNECTED) { |
2207 | retcode = ERR_RESIZE_RESYNC; | |
2208 | goto fail; | |
2209 | } | |
2210 | ||
2211 | if (mdev->state.role == R_SECONDARY && | |
2212 | mdev->state.peer == R_SECONDARY) { | |
2213 | retcode = ERR_NO_PRIMARY; | |
2214 | goto fail; | |
2215 | } | |
2216 | ||
2217 | if (!get_ldev(mdev)) { | |
2218 | retcode = ERR_NO_DISK; | |
2219 | goto fail; | |
2220 | } | |
2221 | ||
31890f4a | 2222 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
2223 | retcode = ERR_NEED_APV_93; |
2224 | goto fail; | |
2225 | } | |
2226 | ||
087c2492 | 2227 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2228 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 PR |
2229 | |
2230 | mdev->ldev->dc.disk_size = (sector_t)rs.resize_size; | |
6495d2c6 | 2231 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2232 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2233 | drbd_md_sync(mdev); |
2234 | put_ldev(mdev); | |
2235 | if (dd == dev_size_error) { | |
2236 | retcode = ERR_NOMEM_BITMAP; | |
2237 | goto fail; | |
2238 | } | |
2239 | ||
087c2492 | 2240 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2241 | if (dd == grew) |
2242 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2243 | ||
2244 | drbd_send_uuids(mdev); | |
6495d2c6 | 2245 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
2246 | } |
2247 | ||
2248 | fail: | |
3b98c0c2 | 2249 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2250 | return 0; |
2251 | } | |
2252 | ||
f399002e | 2253 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2254 | { |
3b98c0c2 | 2255 | enum drbd_ret_code retcode; |
b411b363 | 2256 | cpumask_var_t new_cpu_mask; |
f399002e | 2257 | struct drbd_tconn *tconn; |
778f271d | 2258 | int *rs_plan_s = NULL; |
f399002e LE |
2259 | struct res_opts sc; |
2260 | int err; | |
b411b363 | 2261 | |
f399002e | 2262 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3b98c0c2 LE |
2263 | if (!adm_ctx.reply_skb) |
2264 | return retcode; | |
2265 | if (retcode != NO_ERROR) | |
2266 | goto fail; | |
f399002e | 2267 | tconn = adm_ctx.tconn; |
3b98c0c2 | 2268 | |
b411b363 PR |
2269 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
2270 | retcode = ERR_NOMEM; | |
3b98c0c2 | 2271 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
2272 | goto fail; |
2273 | } | |
2274 | ||
3b98c0c2 LE |
2275 | if (((struct drbd_genlmsghdr*)info->userhdr)->flags |
2276 | & DRBD_GENL_F_SET_DEFAULTS) { | |
f399002e | 2277 | memset(&sc, 0, sizeof(struct res_opts)); |
265be2d0 | 2278 | sc.on_no_data = DRBD_ON_NO_DATA_DEF; |
b411b363 | 2279 | } else |
f399002e | 2280 | sc = tconn->res_opts; |
b411b363 | 2281 | |
f399002e | 2282 | err = res_opts_from_attrs(&sc, info); |
3b98c0c2 | 2283 | if (err) { |
b411b363 | 2284 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2285 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2286 | goto fail; |
2287 | } | |
2288 | ||
b411b363 PR |
2289 | /* silently ignore cpu mask on UP kernel */ |
2290 | if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) { | |
2291 | err = __bitmap_parse(sc.cpu_mask, 32, 0, | |
2292 | cpumask_bits(new_cpu_mask), nr_cpu_ids); | |
2293 | if (err) { | |
f399002e | 2294 | conn_warn(tconn, "__bitmap_parse() failed with %d\n", err); |
b411b363 PR |
2295 | retcode = ERR_CPU_MASK_PARSE; |
2296 | goto fail; | |
2297 | } | |
2298 | } | |
2299 | ||
b411b363 | 2300 | |
f399002e | 2301 | tconn->res_opts = sc; |
b411b363 | 2302 | |
f399002e LE |
2303 | if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) { |
2304 | cpumask_copy(tconn->cpu_mask, new_cpu_mask); | |
2305 | drbd_calc_cpu_mask(tconn); | |
2306 | tconn->receiver.reset_cpu_mask = 1; | |
2307 | tconn->asender.reset_cpu_mask = 1; | |
2308 | tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2309 | } |
2310 | ||
b411b363 | 2311 | fail: |
778f271d | 2312 | kfree(rs_plan_s); |
b411b363 | 2313 | free_cpumask_var(new_cpu_mask); |
3b98c0c2 LE |
2314 | |
2315 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2316 | return 0; |
2317 | } | |
2318 | ||
3b98c0c2 | 2319 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2320 | { |
3b98c0c2 LE |
2321 | struct drbd_conf *mdev; |
2322 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2323 | ||
2324 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2325 | if (!adm_ctx.reply_skb) | |
2326 | return retcode; | |
2327 | if (retcode != NO_ERROR) | |
2328 | goto out; | |
2329 | ||
2330 | mdev = adm_ctx.mdev; | |
b411b363 | 2331 | |
194bfb32 LE |
2332 | /* If there is still bitmap IO pending, probably because of a previous |
2333 | * resync just being finished, wait for it before requesting a new resync. */ | |
2334 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2335 | ||
b411b363 PR |
2336 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2337 | ||
2338 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2339 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2340 | ||
2341 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2342 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2343 | if (mdev->state.conn < C_CONNECTED) |
2344 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2345 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2346 | |
2347 | if (retcode != SS_NEED_CONNECTION) | |
2348 | break; | |
2349 | ||
2350 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2351 | } | |
2352 | ||
3b98c0c2 LE |
2353 | out: |
2354 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2355 | return 0; |
2356 | } | |
2357 | ||
0778286a PR |
2358 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2359 | { | |
2360 | int rv; | |
2361 | ||
2362 | rv = drbd_bmio_set_n_write(mdev); | |
2363 | drbd_suspend_al(mdev); | |
2364 | return rv; | |
2365 | } | |
2366 | ||
3b98c0c2 LE |
2367 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2368 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2369 | { |
3b98c0c2 | 2370 | enum drbd_ret_code retcode; |
194bfb32 | 2371 | |
3b98c0c2 LE |
2372 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2373 | if (!adm_ctx.reply_skb) | |
2374 | return retcode; | |
2375 | if (retcode != NO_ERROR) | |
2376 | goto out; | |
b411b363 | 2377 | |
3b98c0c2 LE |
2378 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2379 | out: | |
2380 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2381 | return 0; |
2382 | } | |
2383 | ||
3b98c0c2 | 2384 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2385 | { |
3b98c0c2 LE |
2386 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2387 | } | |
b411b363 | 2388 | |
3b98c0c2 LE |
2389 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2390 | { | |
2391 | enum drbd_ret_code retcode; | |
2392 | ||
2393 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2394 | if (!adm_ctx.reply_skb) | |
2395 | return retcode; | |
2396 | if (retcode != NO_ERROR) | |
2397 | goto out; | |
b411b363 | 2398 | |
3b98c0c2 LE |
2399 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2400 | retcode = ERR_PAUSE_IS_SET; | |
2401 | out: | |
2402 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2403 | return 0; |
2404 | } | |
2405 | ||
3b98c0c2 | 2406 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2407 | { |
da9fbc27 | 2408 | union drbd_dev_state s; |
3b98c0c2 LE |
2409 | enum drbd_ret_code retcode; |
2410 | ||
2411 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2412 | if (!adm_ctx.reply_skb) | |
2413 | return retcode; | |
2414 | if (retcode != NO_ERROR) | |
2415 | goto out; | |
b411b363 | 2416 | |
3b98c0c2 LE |
2417 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2418 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2419 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2420 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2421 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2422 | } else { | |
2423 | retcode = ERR_PAUSE_IS_CLEAR; | |
2424 | } | |
2425 | } | |
b411b363 | 2426 | |
3b98c0c2 LE |
2427 | out: |
2428 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2429 | return 0; |
2430 | } | |
2431 | ||
3b98c0c2 | 2432 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2433 | { |
3b98c0c2 | 2434 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2435 | } |
2436 | ||
3b98c0c2 | 2437 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2438 | { |
3b98c0c2 LE |
2439 | struct drbd_conf *mdev; |
2440 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2441 | ||
2442 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2443 | if (!adm_ctx.reply_skb) | |
2444 | return retcode; | |
2445 | if (retcode != NO_ERROR) | |
2446 | goto out; | |
2447 | ||
2448 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2449 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2450 | drbd_uuid_new_current(mdev); | |
2451 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2452 | } |
265be2d0 | 2453 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2454 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2455 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2456 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2457 | tl_clear(mdev->tconn); |
265be2d0 | 2458 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2459 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2460 | } |
2461 | drbd_resume_io(mdev); | |
2462 | ||
3b98c0c2 LE |
2463 | out: |
2464 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2465 | return 0; |
2466 | } | |
2467 | ||
3b98c0c2 | 2468 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2469 | { |
3b98c0c2 | 2470 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2471 | } |
2472 | ||
543cc10b LE |
2473 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *conn_name, unsigned vnr) |
2474 | { | |
2475 | struct nlattr *nla; | |
2476 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2477 | if (!nla) | |
2478 | goto nla_put_failure; | |
2479 | if (vnr != VOLUME_UNSPECIFIED) | |
2480 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
2481 | NLA_PUT_STRING(skb, T_ctx_conn_name, conn_name); | |
2482 | nla_nest_end(skb, nla); | |
2483 | return 0; | |
2484 | ||
2485 | nla_put_failure: | |
2486 | if (nla) | |
2487 | nla_nest_cancel(skb, nla); | |
2488 | return -EMSGSIZE; | |
2489 | } | |
2490 | ||
3b98c0c2 LE |
2491 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2492 | const struct sib_info *sib) | |
b411b363 | 2493 | { |
3b98c0c2 | 2494 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
44ed167d | 2495 | struct net_conf *nc; |
3b98c0c2 LE |
2496 | struct nlattr *nla; |
2497 | int got_ldev; | |
3b98c0c2 LE |
2498 | int err = 0; |
2499 | int exclude_sensitive; | |
2500 | ||
2501 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2502 | * to. So we better exclude_sensitive information. | |
2503 | * | |
2504 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2505 | * in the context of the requesting user process. Exclude sensitive | |
2506 | * information, unless current has superuser. | |
2507 | * | |
2508 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2509 | * relies on the current implementation of netlink_dump(), which | |
2510 | * executes the dump callback successively from netlink_recvmsg(), | |
2511 | * always in the context of the receiving process */ | |
2512 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2513 | ||
2514 | got_ldev = get_ldev(mdev); | |
3b98c0c2 LE |
2515 | |
2516 | /* We need to add connection name and volume number information still. | |
2517 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2518 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2519 | goto nla_put_failure; |
3b98c0c2 | 2520 | |
f399002e LE |
2521 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2522 | goto nla_put_failure; | |
2523 | ||
3b98c0c2 LE |
2524 | if (got_ldev) |
2525 | if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive)) | |
2526 | goto nla_put_failure; | |
44ed167d PR |
2527 | |
2528 | rcu_read_lock(); | |
2529 | nc = rcu_dereference(mdev->tconn->net_conf); | |
2530 | if (nc) | |
2531 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2532 | rcu_read_unlock(); | |
2533 | if (err) | |
2534 | goto nla_put_failure; | |
3b98c0c2 | 2535 | |
3b98c0c2 LE |
2536 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2537 | if (!nla) | |
2538 | goto nla_put_failure; | |
2539 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2540 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2541 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2542 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2543 | ||
2544 | if (got_ldev) { | |
2545 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2546 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2547 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2548 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2549 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2550 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2551 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2552 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2553 | } | |
b411b363 PR |
2554 | } |
2555 | ||
3b98c0c2 LE |
2556 | if (sib) { |
2557 | switch(sib->sib_reason) { | |
2558 | case SIB_SYNC_PROGRESS: | |
2559 | case SIB_GET_STATUS_REPLY: | |
2560 | break; | |
2561 | case SIB_STATE_CHANGE: | |
2562 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2563 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2564 | break; | |
2565 | case SIB_HELPER_POST: | |
2566 | NLA_PUT_U32(skb, | |
2567 | T_helper_exit_code, sib->helper_exit_code); | |
2568 | /* fall through */ | |
2569 | case SIB_HELPER_PRE: | |
2570 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2571 | break; | |
2572 | } | |
b411b363 | 2573 | } |
3b98c0c2 | 2574 | nla_nest_end(skb, nla); |
b411b363 | 2575 | |
3b98c0c2 LE |
2576 | if (0) |
2577 | nla_put_failure: | |
2578 | err = -EMSGSIZE; | |
2579 | if (got_ldev) | |
2580 | put_ldev(mdev); | |
3b98c0c2 | 2581 | return err; |
b411b363 PR |
2582 | } |
2583 | ||
3b98c0c2 | 2584 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2585 | { |
3b98c0c2 LE |
2586 | enum drbd_ret_code retcode; |
2587 | int err; | |
b411b363 | 2588 | |
3b98c0c2 LE |
2589 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2590 | if (!adm_ctx.reply_skb) | |
2591 | return retcode; | |
2592 | if (retcode != NO_ERROR) | |
2593 | goto out; | |
b411b363 | 2594 | |
3b98c0c2 LE |
2595 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2596 | if (err) { | |
2597 | nlmsg_free(adm_ctx.reply_skb); | |
2598 | return err; | |
b411b363 | 2599 | } |
3b98c0c2 LE |
2600 | out: |
2601 | drbd_adm_finish(info, retcode); | |
2602 | return 0; | |
b411b363 PR |
2603 | } |
2604 | ||
71932efc | 2605 | int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2606 | { |
3b98c0c2 LE |
2607 | struct drbd_conf *mdev; |
2608 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2609 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2610 | struct drbd_tconn *tconn = NULL; | |
2611 | struct drbd_tconn *tmp; | |
2612 | unsigned volume = cb->args[1]; | |
2613 | ||
2614 | /* Open coded, deferred, iteration: | |
2615 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2616 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2617 | * ... | |
2618 | * } | |
2619 | * } | |
2620 | * where tconn is cb->args[0]; | |
2621 | * and i is cb->args[1]; | |
2622 | * | |
71932efc LE |
2623 | * cb->args[2] indicates if we shall loop over all resources, |
2624 | * or just dump all volumes of a single resource. | |
2625 | * | |
3b98c0c2 LE |
2626 | * This may miss entries inserted after this dump started, |
2627 | * or entries deleted before they are reached. | |
543cc10b LE |
2628 | * |
2629 | * We need to make sure the mdev won't disappear while | |
2630 | * we are looking at it, and revalidate our iterators | |
2631 | * on each iteration. | |
2632 | */ | |
3b98c0c2 | 2633 | |
9dc9fbb3 | 2634 | /* synchronize with conn_create()/conn_destroy() */ |
ef356262 | 2635 | down_read(&drbd_cfg_rwsem); |
543cc10b LE |
2636 | /* revalidate iterator position */ |
2637 | list_for_each_entry(tmp, &drbd_tconns, all_tconn) { | |
2638 | if (pos == NULL) { | |
2639 | /* first iteration */ | |
2640 | pos = tmp; | |
2641 | tconn = pos; | |
2642 | break; | |
2643 | } | |
2644 | if (tmp == pos) { | |
2645 | tconn = pos; | |
2646 | break; | |
2647 | } | |
2648 | } | |
2649 | if (tconn) { | |
71932efc | 2650 | next_tconn: |
543cc10b LE |
2651 | mdev = idr_get_next(&tconn->volumes, &volume); |
2652 | if (!mdev) { | |
2653 | /* No more volumes to dump on this tconn. | |
2654 | * Advance tconn iterator. */ | |
2655 | pos = list_entry(tconn->all_tconn.next, | |
2656 | struct drbd_tconn, all_tconn); | |
71932efc | 2657 | /* Did we dump any volume on this tconn yet? */ |
543cc10b | 2658 | if (volume != 0) { |
71932efc LE |
2659 | /* If we reached the end of the list, |
2660 | * or only a single resource dump was requested, | |
2661 | * we are done. */ | |
2662 | if (&pos->all_tconn == &drbd_tconns || cb->args[2]) | |
2663 | goto out; | |
543cc10b | 2664 | volume = 0; |
71932efc | 2665 | tconn = pos; |
543cc10b LE |
2666 | goto next_tconn; |
2667 | } | |
2668 | } | |
2669 | ||
3b98c0c2 LE |
2670 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2671 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2672 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2673 | if (!dh) | |
543cc10b LE |
2674 | goto out; |
2675 | ||
2676 | if (!mdev) { | |
2677 | /* this is a tconn without a single volume */ | |
2678 | dh->minor = -1U; | |
2679 | dh->ret_code = NO_ERROR; | |
2680 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2681 | genlmsg_cancel(skb, dh); | |
2682 | else | |
2683 | genlmsg_end(skb, dh); | |
2684 | goto out; | |
2685 | } | |
3b98c0c2 | 2686 | |
543cc10b LE |
2687 | D_ASSERT(mdev->vnr == volume); |
2688 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2689 | |
543cc10b | 2690 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2691 | dh->ret_code = NO_ERROR; |
2692 | ||
2693 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2694 | genlmsg_cancel(skb, dh); | |
543cc10b | 2695 | goto out; |
3b98c0c2 LE |
2696 | } |
2697 | genlmsg_end(skb, dh); | |
2698 | } | |
b411b363 | 2699 | |
543cc10b | 2700 | out: |
ef356262 | 2701 | up_read(&drbd_cfg_rwsem); |
543cc10b LE |
2702 | /* where to start the next iteration */ |
2703 | cb->args[0] = (long)pos; | |
2704 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2705 | |
543cc10b LE |
2706 | /* No more tconns/volumes/minors found results in an empty skb. |
2707 | * Which will terminate the dump. */ | |
3b98c0c2 | 2708 | return skb->len; |
b411b363 PR |
2709 | } |
2710 | ||
71932efc LE |
2711 | /* |
2712 | * Request status of all resources, or of all volumes within a single resource. | |
2713 | * | |
2714 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
2715 | * Which means we cannot use the family->attrbuf or other such members, because | |
2716 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
2717 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
2718 | * | |
2719 | * Once things are setup properly, we call into get_one_status(). | |
2720 | */ | |
2721 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) | |
2722 | { | |
2723 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
2724 | struct nlattr *nla; | |
2725 | const char *conn_name; | |
2726 | struct drbd_tconn *tconn; | |
2727 | ||
2728 | /* Is this a followup call? */ | |
2729 | if (cb->args[0]) { | |
2730 | /* ... of a single resource dump, | |
2731 | * and the resource iterator has been advanced already? */ | |
2732 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
2733 | return 0; /* DONE. */ | |
2734 | goto dump; | |
2735 | } | |
2736 | ||
2737 | /* First call (from netlink_dump_start). We need to figure out | |
2738 | * which resource(s) the user wants us to dump. */ | |
2739 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
2740 | nlmsg_attrlen(cb->nlh, hdrlen), | |
2741 | DRBD_NLA_CFG_CONTEXT); | |
2742 | ||
2743 | /* No explicit context given. Dump all. */ | |
2744 | if (!nla) | |
2745 | goto dump; | |
2746 | nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); | |
2747 | /* context given, but no name present? */ | |
2748 | if (!nla) | |
2749 | return -EINVAL; | |
2750 | conn_name = nla_data(nla); | |
2751 | tconn = conn_by_name(conn_name); | |
2752 | if (!tconn) | |
2753 | return -ENODEV; | |
2754 | ||
2755 | /* prime iterators, and set "filter" mode mark: | |
2756 | * only dump this tconn. */ | |
2757 | cb->args[0] = (long)tconn; | |
2758 | /* cb->args[1] = 0; passed in this way. */ | |
2759 | cb->args[2] = (long)tconn; | |
2760 | ||
2761 | dump: | |
2762 | return get_one_status(skb, cb); | |
2763 | } | |
2764 | ||
3b98c0c2 | 2765 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2766 | { |
3b98c0c2 LE |
2767 | enum drbd_ret_code retcode; |
2768 | struct timeout_parms tp; | |
2769 | int err; | |
b411b363 | 2770 | |
3b98c0c2 LE |
2771 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2772 | if (!adm_ctx.reply_skb) | |
2773 | return retcode; | |
2774 | if (retcode != NO_ERROR) | |
2775 | goto out; | |
b411b363 | 2776 | |
3b98c0c2 LE |
2777 | tp.timeout_type = |
2778 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2779 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2780 | UT_DEFAULT; | |
b411b363 | 2781 | |
3b98c0c2 LE |
2782 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2783 | if (err) { | |
2784 | nlmsg_free(adm_ctx.reply_skb); | |
2785 | return err; | |
2786 | } | |
2787 | out: | |
2788 | drbd_adm_finish(info, retcode); | |
2789 | return 0; | |
b411b363 PR |
2790 | } |
2791 | ||
3b98c0c2 | 2792 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2793 | { |
3b98c0c2 LE |
2794 | struct drbd_conf *mdev; |
2795 | enum drbd_ret_code retcode; | |
b411b363 | 2796 | |
3b98c0c2 LE |
2797 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2798 | if (!adm_ctx.reply_skb) | |
2799 | return retcode; | |
2800 | if (retcode != NO_ERROR) | |
2801 | goto out; | |
873b0d5f | 2802 | |
3b98c0c2 LE |
2803 | mdev = adm_ctx.mdev; |
2804 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2805 | /* resume from last known position, if possible */ | |
2806 | struct start_ov_parms parms = | |
2807 | { .ov_start_sector = mdev->ov_start_sector }; | |
f399002e | 2808 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2809 | if (err) { |
2810 | retcode = ERR_MANDATORY_TAG; | |
2811 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2812 | goto out; | |
2813 | } | |
2814 | /* w_make_ov_request expects position to be aligned */ | |
2815 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2816 | } | |
873b0d5f LE |
2817 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2818 | * just being finished, wait for it before requesting a new resync. */ | |
2819 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2820 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2821 | out: | |
2822 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2823 | return 0; |
2824 | } | |
2825 | ||
2826 | ||
3b98c0c2 | 2827 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2828 | { |
3b98c0c2 LE |
2829 | struct drbd_conf *mdev; |
2830 | enum drbd_ret_code retcode; | |
b411b363 PR |
2831 | int skip_initial_sync = 0; |
2832 | int err; | |
3b98c0c2 | 2833 | struct new_c_uuid_parms args; |
b411b363 | 2834 | |
3b98c0c2 LE |
2835 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2836 | if (!adm_ctx.reply_skb) | |
2837 | return retcode; | |
2838 | if (retcode != NO_ERROR) | |
2839 | goto out_nolock; | |
b411b363 | 2840 | |
3b98c0c2 LE |
2841 | mdev = adm_ctx.mdev; |
2842 | memset(&args, 0, sizeof(args)); | |
2843 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 2844 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
2845 | if (err) { |
2846 | retcode = ERR_MANDATORY_TAG; | |
2847 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2848 | goto out_nolock; | |
2849 | } | |
b411b363 PR |
2850 | } |
2851 | ||
8410da8f | 2852 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2853 | |
2854 | if (!get_ldev(mdev)) { | |
2855 | retcode = ERR_NO_DISK; | |
2856 | goto out; | |
2857 | } | |
2858 | ||
2859 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2860 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2861 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2862 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2863 | skip_initial_sync = 1; | |
2864 | } else if (mdev->state.conn != C_STANDALONE) { | |
2865 | retcode = ERR_CONNECTED; | |
2866 | goto out_dec; | |
2867 | } | |
2868 | ||
2869 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2870 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2871 | ||
2872 | if (args.clear_bm) { | |
20ceb2b2 LE |
2873 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2874 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2875 | if (err) { |
2876 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2877 | retcode = ERR_IO_MD_DISK; | |
2878 | } | |
2879 | if (skip_initial_sync) { | |
2880 | drbd_send_uuids_skip_initial_sync(mdev); | |
2881 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2882 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2883 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2884 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2885 | CS_VERBOSE, NULL); | |
87eeee41 | 2886 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2887 | } |
2888 | } | |
2889 | ||
2890 | drbd_md_sync(mdev); | |
2891 | out_dec: | |
2892 | put_ldev(mdev); | |
2893 | out: | |
8410da8f | 2894 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2895 | out_nolock: |
2896 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2897 | return 0; |
2898 | } | |
2899 | ||
3b98c0c2 LE |
2900 | static enum drbd_ret_code |
2901 | drbd_check_conn_name(const char *name) | |
774b3055 | 2902 | { |
3b98c0c2 LE |
2903 | if (!name || !name[0]) { |
2904 | drbd_msg_put_info("connection name missing"); | |
2905 | return ERR_MANDATORY_TAG; | |
774b3055 | 2906 | } |
3b98c0c2 LE |
2907 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2908 | * we must not allow slashes */ | |
2909 | if (strchr(name, '/')) { | |
2910 | drbd_msg_put_info("invalid connection name"); | |
2911 | return ERR_INVALID_REQUEST; | |
774b3055 | 2912 | } |
3b98c0c2 | 2913 | return NO_ERROR; |
774b3055 PR |
2914 | } |
2915 | ||
3b98c0c2 | 2916 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2917 | { |
3b98c0c2 | 2918 | enum drbd_ret_code retcode; |
9f5180e5 | 2919 | |
3b98c0c2 LE |
2920 | retcode = drbd_adm_prepare(skb, info, 0); |
2921 | if (!adm_ctx.reply_skb) | |
2922 | return retcode; | |
2923 | if (retcode != NO_ERROR) | |
2924 | goto out; | |
b411b363 | 2925 | |
3b98c0c2 LE |
2926 | retcode = drbd_check_conn_name(adm_ctx.conn_name); |
2927 | if (retcode != NO_ERROR) | |
2928 | goto out; | |
b411b363 | 2929 | |
3b98c0c2 | 2930 | if (adm_ctx.tconn) { |
38f19616 LE |
2931 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2932 | retcode = ERR_INVALID_REQUEST; | |
2933 | drbd_msg_put_info("connection exists"); | |
2934 | } | |
2935 | /* else: still NO_ERROR */ | |
3b98c0c2 | 2936 | goto out; |
b411b363 PR |
2937 | } |
2938 | ||
9dc9fbb3 | 2939 | if (!conn_create(adm_ctx.conn_name)) |
b411b363 | 2940 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
2941 | out: |
2942 | drbd_adm_finish(info, retcode); | |
2943 | return 0; | |
b411b363 PR |
2944 | } |
2945 | ||
3b98c0c2 | 2946 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2947 | { |
3b98c0c2 LE |
2948 | struct drbd_genlmsghdr *dh = info->userhdr; |
2949 | enum drbd_ret_code retcode; | |
b411b363 | 2950 | |
3b98c0c2 LE |
2951 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2952 | if (!adm_ctx.reply_skb) | |
2953 | return retcode; | |
2954 | if (retcode != NO_ERROR) | |
2955 | goto out; | |
b411b363 | 2956 | |
3b98c0c2 LE |
2957 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
2958 | if (dh->minor >= minor_count) { | |
2959 | drbd_msg_put_info("requested minor out of range"); | |
2960 | retcode = ERR_INVALID_REQUEST; | |
2961 | goto out; | |
b411b363 | 2962 | } |
0c8e36d9 | 2963 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
2964 | drbd_msg_put_info("requested volume id out of range"); |
2965 | retcode = ERR_INVALID_REQUEST; | |
2966 | goto out; | |
b411b363 | 2967 | } |
b411b363 | 2968 | |
38f19616 LE |
2969 | /* drbd_adm_prepare made sure already |
2970 | * that mdev->tconn and mdev->vnr match the request. */ | |
2971 | if (adm_ctx.mdev) { | |
2972 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
2973 | retcode = ERR_MINOR_EXISTS; | |
2974 | /* else: still NO_ERROR */ | |
2975 | goto out; | |
2976 | } | |
2977 | ||
d3fcb490 | 2978 | down_write(&drbd_cfg_rwsem); |
3b98c0c2 | 2979 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
d3fcb490 | 2980 | up_write(&drbd_cfg_rwsem); |
3b98c0c2 LE |
2981 | out: |
2982 | drbd_adm_finish(info, retcode); | |
2983 | return 0; | |
b411b363 PR |
2984 | } |
2985 | ||
85f75dd7 LE |
2986 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
2987 | { | |
2988 | if (mdev->state.disk == D_DISKLESS && | |
2989 | /* no need to be mdev->state.conn == C_STANDALONE && | |
2990 | * we may want to delete a minor from a live replication group. | |
2991 | */ | |
2992 | mdev->state.role == R_SECONDARY) { | |
ff370e5a | 2993 | drbd_delete_device(mdev); |
85f75dd7 LE |
2994 | return NO_ERROR; |
2995 | } else | |
2996 | return ERR_MINOR_CONFIGURED; | |
2997 | } | |
2998 | ||
3b98c0c2 | 2999 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3000 | { |
3b98c0c2 | 3001 | enum drbd_ret_code retcode; |
b411b363 | 3002 | |
3b98c0c2 LE |
3003 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
3004 | if (!adm_ctx.reply_skb) | |
3005 | return retcode; | |
3006 | if (retcode != NO_ERROR) | |
3007 | goto out; | |
b411b363 | 3008 | |
ef356262 | 3009 | down_write(&drbd_cfg_rwsem); |
85f75dd7 | 3010 | retcode = adm_delete_minor(adm_ctx.mdev); |
ef356262 | 3011 | up_write(&drbd_cfg_rwsem); |
85f75dd7 LE |
3012 | out: |
3013 | drbd_adm_finish(info, retcode); | |
3014 | return 0; | |
3015 | } | |
3016 | ||
3017 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
3018 | { | |
3019 | enum drbd_ret_code retcode; | |
3020 | enum drbd_state_rv rv; | |
3021 | struct drbd_conf *mdev; | |
3022 | unsigned i; | |
3023 | ||
3024 | retcode = drbd_adm_prepare(skb, info, 0); | |
3025 | if (!adm_ctx.reply_skb) | |
3026 | return retcode; | |
3027 | if (retcode != NO_ERROR) | |
3028 | goto out; | |
3029 | ||
3030 | if (!adm_ctx.tconn) { | |
3031 | retcode = ERR_CONN_NOT_KNOWN; | |
3032 | goto out; | |
3033 | } | |
3034 | ||
ef356262 | 3035 | down_read(&drbd_cfg_rwsem); |
85f75dd7 LE |
3036 | /* demote */ |
3037 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3038 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
3039 | if (retcode < SS_SUCCESS) { | |
3040 | drbd_msg_put_info("failed to demote"); | |
3041 | goto out_unlock; | |
3042 | } | |
3043 | } | |
3044 | ||
3045 | /* disconnect */ | |
3046 | rv = conn_try_disconnect(adm_ctx.tconn, 0); | |
3047 | if (rv < SS_SUCCESS) { | |
3048 | retcode = rv; /* enum type mismatch! */ | |
3049 | drbd_msg_put_info("failed to disconnect"); | |
3050 | goto out_unlock; | |
3051 | } | |
3052 | ||
3053 | /* detach */ | |
3054 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3055 | rv = adm_detach(mdev); | |
3056 | if (rv < SS_SUCCESS) { | |
3057 | retcode = rv; /* enum type mismatch! */ | |
3058 | drbd_msg_put_info("failed to detach"); | |
3059 | goto out_unlock; | |
3060 | } | |
3061 | } | |
ef356262 | 3062 | up_read(&drbd_cfg_rwsem); |
85f75dd7 LE |
3063 | |
3064 | /* delete volumes */ | |
ef356262 | 3065 | down_write(&drbd_cfg_rwsem); |
85f75dd7 LE |
3066 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { |
3067 | retcode = adm_delete_minor(mdev); | |
3068 | if (retcode != NO_ERROR) { | |
3069 | /* "can not happen" */ | |
3070 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 PR |
3071 | up_write(&drbd_cfg_rwsem); |
3072 | goto out; | |
85f75dd7 LE |
3073 | } |
3074 | } | |
3075 | ||
3076 | /* stop all threads */ | |
3077 | conn_reconfig_done(adm_ctx.tconn); | |
3078 | ||
3079 | /* delete connection */ | |
3080 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
9dc9fbb3 PR |
3081 | list_del(&adm_ctx.tconn->all_tconn); |
3082 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
3083 | ||
85f75dd7 LE |
3084 | retcode = NO_ERROR; |
3085 | } else { | |
3086 | /* "can not happen" */ | |
3087 | retcode = ERR_CONN_IN_USE; | |
3088 | drbd_msg_put_info("failed to delete connection"); | |
85f75dd7 | 3089 | } |
ef356262 PR |
3090 | |
3091 | up_write(&drbd_cfg_rwsem); | |
3092 | goto out; | |
85f75dd7 | 3093 | out_unlock: |
ef356262 | 3094 | up_read(&drbd_cfg_rwsem); |
3b98c0c2 LE |
3095 | out: |
3096 | drbd_adm_finish(info, retcode); | |
3097 | return 0; | |
b411b363 PR |
3098 | } |
3099 | ||
3b98c0c2 | 3100 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3101 | { |
3b98c0c2 | 3102 | enum drbd_ret_code retcode; |
b411b363 | 3103 | |
3b98c0c2 LE |
3104 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
3105 | if (!adm_ctx.reply_skb) | |
3106 | return retcode; | |
3107 | if (retcode != NO_ERROR) | |
3108 | goto out; | |
3109 | ||
ef356262 | 3110 | down_write(&drbd_cfg_rwsem); |
3b98c0c2 | 3111 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { |
9dc9fbb3 PR |
3112 | list_del(&adm_ctx.tconn->all_tconn); |
3113 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
3114 | ||
3b98c0c2 LE |
3115 | retcode = NO_ERROR; |
3116 | } else { | |
3117 | retcode = ERR_CONN_IN_USE; | |
b411b363 | 3118 | } |
ef356262 | 3119 | up_write(&drbd_cfg_rwsem); |
b411b363 | 3120 | |
3b98c0c2 LE |
3121 | out: |
3122 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3123 | return 0; |
3124 | } | |
3125 | ||
3b98c0c2 | 3126 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3127 | { |
3b98c0c2 LE |
3128 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3129 | struct sk_buff *msg; | |
3130 | struct drbd_genlmsghdr *d_out; | |
3131 | unsigned seq; | |
3132 | int err = -ENOMEM; | |
3133 | ||
3134 | seq = atomic_inc_return(&drbd_genl_seq); | |
3135 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3136 | if (!msg) | |
3137 | goto failed; | |
3138 | ||
3139 | err = -EMSGSIZE; | |
3140 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3141 | if (!d_out) /* cannot happen, but anyways. */ | |
3142 | goto nla_put_failure; | |
3143 | d_out->minor = mdev_to_minor(mdev); | |
3144 | d_out->ret_code = 0; | |
3145 | ||
3146 | if (nla_put_status_info(msg, mdev, sib)) | |
3147 | goto nla_put_failure; | |
3148 | genlmsg_end(msg, d_out); | |
3149 | err = drbd_genl_multicast_events(msg, 0); | |
3150 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3151 | if (err && err != -ESRCH) | |
3152 | goto failed; | |
b411b363 | 3153 | |
3b98c0c2 | 3154 | return; |
b411b363 | 3155 | |
3b98c0c2 LE |
3156 | nla_put_failure: |
3157 | nlmsg_free(msg); | |
3158 | failed: | |
3159 | dev_err(DEV, "Error %d while broadcasting event. " | |
3160 | "Event seq:%u sib_reason:%u\n", | |
3161 | err, seq, sib->sib_reason); | |
b411b363 | 3162 | } |