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Commit | Line | Data |
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b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
265be2d0 | 35 | #include "drbd_req.h" |
b411b363 PR |
36 | #include "drbd_wrappers.h" |
37 | #include <asm/unaligned.h> | |
b411b363 | 38 | #include <linux/drbd_limits.h> |
87f7be4c | 39 | #include <linux/kthread.h> |
b411b363 | 40 | |
3b98c0c2 LE |
41 | #include <net/genetlink.h> |
42 | ||
43 | /* .doit */ | |
44 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
45 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
46 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
50 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info); | |
51 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 52 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
53 | |
54 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
56 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); | |
57 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
58 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); | |
59 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
60 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
61 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
62 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
63 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
64 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
65 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
66 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
67 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
68 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
69 | int drbd_adm_syncer(struct sk_buff *skb, struct genl_info *info); | |
70 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); | |
71 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
72 | /* .dumpit */ | |
73 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
74 | ||
75 | #include <linux/drbd_genl_api.h> | |
76 | #include <linux/genl_magic_func.h> | |
77 | ||
78 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
79 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
80 | ||
3b98c0c2 LE |
81 | /* Configuration is strictly serialized, because generic netlink message |
82 | * processing is strictly serialized by the genl_lock(). | |
83 | * Which means we can use one static global drbd_config_context struct. | |
84 | */ | |
85 | static struct drbd_config_context { | |
86 | /* assigned from drbd_genlmsghdr */ | |
87 | unsigned int minor; | |
88 | /* assigned from request attributes, if present */ | |
89 | unsigned int volume; | |
90 | #define VOLUME_UNSPECIFIED (-1U) | |
91 | /* pointer into the request skb, | |
92 | * limited lifetime! */ | |
93 | char *conn_name; | |
94 | ||
95 | /* reply buffer */ | |
96 | struct sk_buff *reply_skb; | |
97 | /* pointer into reply buffer */ | |
98 | struct drbd_genlmsghdr *reply_dh; | |
99 | /* resolved from attributes, if possible */ | |
100 | struct drbd_conf *mdev; | |
101 | struct drbd_tconn *tconn; | |
102 | } adm_ctx; | |
103 | ||
104 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
105 | { | |
106 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
107 | if (genlmsg_reply(skb, info)) | |
108 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 109 | } |
3b98c0c2 LE |
110 | |
111 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
112 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 113 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
114 | { |
115 | struct sk_buff *skb = adm_ctx.reply_skb; | |
116 | struct nlattr *nla; | |
117 | int err = -EMSGSIZE; | |
118 | ||
119 | if (!info || !info[0]) | |
120 | return 0; | |
121 | ||
122 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
123 | if (!nla) | |
124 | return err; | |
125 | ||
126 | err = nla_put_string(skb, T_info_text, info); | |
127 | if (err) { | |
128 | nla_nest_cancel(skb, nla); | |
129 | return err; | |
130 | } else | |
131 | nla_nest_end(skb, nla); | |
132 | return 0; | |
b411b363 PR |
133 | } |
134 | ||
3b98c0c2 LE |
135 | /* This would be a good candidate for a "pre_doit" hook, |
136 | * and per-family private info->pointers. | |
137 | * But we need to stay compatible with older kernels. | |
138 | * If it returns successfully, adm_ctx members are valid. | |
139 | */ | |
140 | #define DRBD_ADM_NEED_MINOR 1 | |
141 | #define DRBD_ADM_NEED_CONN 2 | |
142 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, | |
143 | unsigned flags) | |
144 | { | |
145 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
146 | const u8 cmd = info->genlhdr->cmd; | |
147 | int err; | |
148 | ||
149 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
150 | ||
151 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
152 | if (cmd != DRBD_ADM_GET_STATUS | |
153 | && security_netlink_recv(skb, CAP_SYS_ADMIN)) | |
154 | return -EPERM; | |
155 | ||
156 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
157 | if (!adm_ctx.reply_skb) | |
158 | goto fail; | |
159 | ||
160 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
161 | info, &drbd_genl_family, 0, cmd); | |
162 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
163 | * but anyways */ | |
164 | if (!adm_ctx.reply_dh) | |
165 | goto fail; | |
166 | ||
167 | adm_ctx.reply_dh->minor = d_in->minor; | |
168 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
169 | ||
170 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { | |
171 | struct nlattr *nla; | |
172 | /* parse and validate only */ | |
173 | err = drbd_cfg_context_from_attrs(NULL, info->attrs); | |
174 | if (err) | |
175 | goto fail; | |
176 | ||
177 | /* It was present, and valid, | |
178 | * copy it over to the reply skb. */ | |
179 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
180 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
181 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
182 | if (err) | |
183 | goto fail; | |
184 | ||
185 | /* and assign stuff to the global adm_ctx */ | |
186 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
187 | adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; | |
188 | nla = nested_attr_tb[__nla_type(T_ctx_conn_name)]; | |
189 | if (nla) | |
190 | adm_ctx.conn_name = nla_data(nla); | |
191 | } else | |
192 | adm_ctx.volume = VOLUME_UNSPECIFIED; | |
193 | ||
194 | adm_ctx.minor = d_in->minor; | |
195 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
196 | adm_ctx.tconn = conn_by_name(adm_ctx.conn_name); | |
197 | ||
198 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
199 | drbd_msg_put_info("unknown minor"); | |
200 | return ERR_MINOR_INVALID; | |
201 | } | |
202 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { | |
203 | drbd_msg_put_info("unknown connection"); | |
204 | return ERR_INVALID_REQUEST; | |
205 | } | |
206 | ||
207 | /* some more paranoia, if the request was over-determined */ | |
527f4b24 LE |
208 | if (adm_ctx.mdev && adm_ctx.tconn && |
209 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
210 | pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", | |
211 | adm_ctx.minor, adm_ctx.conn_name, adm_ctx.mdev->tconn->name); | |
212 | drbd_msg_put_info("minor exists in different connection"); | |
213 | return ERR_INVALID_REQUEST; | |
214 | } | |
3b98c0c2 LE |
215 | if (adm_ctx.mdev && |
216 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
217 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
218 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
219 | adm_ctx.minor, adm_ctx.volume, | |
220 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 221 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
222 | return ERR_INVALID_REQUEST; |
223 | } | |
cffec5b2 LE |
224 | if (adm_ctx.mdev && !adm_ctx.tconn) |
225 | adm_ctx.tconn = adm_ctx.mdev->tconn; | |
3b98c0c2 LE |
226 | return NO_ERROR; |
227 | ||
228 | fail: | |
229 | nlmsg_free(adm_ctx.reply_skb); | |
230 | adm_ctx.reply_skb = NULL; | |
231 | return -ENOMEM; | |
232 | } | |
233 | ||
234 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
235 | { | |
236 | struct nlattr *nla; | |
237 | const char *conn_name = NULL; | |
238 | ||
239 | if (!adm_ctx.reply_skb) | |
240 | return -ENOMEM; | |
241 | ||
242 | adm_ctx.reply_dh->ret_code = retcode; | |
243 | ||
244 | nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; | |
245 | if (nla) { | |
246 | nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); | |
247 | if (nla) | |
248 | conn_name = nla_data(nla); | |
249 | } | |
250 | ||
251 | drbd_adm_send_reply(adm_ctx.reply_skb, info); | |
252 | return 0; | |
253 | } | |
b411b363 | 254 | |
6b75dced | 255 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 256 | { |
6b75dced | 257 | char *afs; |
b411b363 | 258 | |
6b75dced PR |
259 | if (get_net_conf(tconn)) { |
260 | switch (((struct sockaddr *)tconn->net_conf->peer_addr)->sa_family) { | |
b411b363 PR |
261 | case AF_INET6: |
262 | afs = "ipv6"; | |
6b75dced PR |
263 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", |
264 | &((struct sockaddr_in6 *)tconn->net_conf->peer_addr)->sin6_addr); | |
b411b363 PR |
265 | break; |
266 | case AF_INET: | |
267 | afs = "ipv4"; | |
6b75dced PR |
268 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
269 | &((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr); | |
b411b363 PR |
270 | break; |
271 | default: | |
272 | afs = "ssocks"; | |
6b75dced PR |
273 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", |
274 | &((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr); | |
b411b363 | 275 | } |
6b75dced PR |
276 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
277 | put_net_conf(tconn); | |
b411b363 | 278 | } |
6b75dced PR |
279 | } |
280 | ||
281 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
282 | { | |
283 | char *envp[] = { "HOME=/", | |
284 | "TERM=linux", | |
285 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
286 | (char[20]) { }, /* address family */ | |
287 | (char[60]) { }, /* address */ | |
288 | NULL }; | |
289 | char mb[12]; | |
290 | char *argv[] = {usermode_helper, cmd, mb, NULL }; | |
291 | struct sib_info sib; | |
292 | int ret; | |
293 | ||
294 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); | |
295 | setup_khelper_env(mdev->tconn, envp); | |
b411b363 | 296 | |
1090c056 LE |
297 | /* The helper may take some time. |
298 | * write out any unsynced meta data changes now */ | |
299 | drbd_md_sync(mdev); | |
300 | ||
b411b363 | 301 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
302 | sib.sib_reason = SIB_HELPER_PRE; |
303 | sib.helper_name = cmd; | |
304 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
305 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); |
306 | if (ret) | |
307 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
308 | usermode_helper, cmd, mb, | |
309 | (ret >> 8) & 0xff, ret); | |
310 | else | |
311 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
312 | usermode_helper, cmd, mb, | |
313 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
314 | sib.sib_reason = SIB_HELPER_POST; |
315 | sib.helper_exit_code = ret; | |
316 | drbd_bcast_event(mdev, &sib); | |
b411b363 PR |
317 | |
318 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
319 | ret = 0; | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
6b75dced PR |
324 | static void conn_md_sync(struct drbd_tconn *tconn) |
325 | { | |
326 | struct drbd_conf *mdev; | |
327 | int minor; | |
328 | ||
329 | idr_for_each_entry(&tconn->volumes, mdev, minor) | |
330 | drbd_md_sync(mdev); | |
331 | } | |
332 | ||
333 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) | |
334 | { | |
335 | char *envp[] = { "HOME=/", | |
336 | "TERM=linux", | |
337 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
338 | (char[20]) { }, /* address family */ | |
339 | (char[60]) { }, /* address */ | |
340 | NULL }; | |
341 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
342 | int ret; | |
343 | ||
344 | setup_khelper_env(tconn, envp); | |
345 | conn_md_sync(tconn); | |
346 | ||
347 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
348 | /* TODO: conn_bcast_event() ?? */ | |
349 | ||
350 | ret = call_usermodehelper(usermode_helper, argv, envp, 1); | |
351 | if (ret) | |
352 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
353 | usermode_helper, cmd, tconn->name, | |
354 | (ret >> 8) & 0xff, ret); | |
355 | else | |
356 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
357 | usermode_helper, cmd, tconn->name, | |
358 | (ret >> 8) & 0xff, ret); | |
359 | /* TODO: conn_bcast_event() ?? */ | |
360 | ||
361 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
362 | ret = 0; | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
b411b363 PR |
367 | enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev) |
368 | { | |
369 | char *ex_to_string; | |
370 | int r; | |
371 | enum drbd_disk_state nps; | |
372 | enum drbd_fencing_p fp; | |
373 | ||
374 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
375 | ||
376 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
377 | fp = mdev->ldev->dc.fencing; | |
378 | put_ldev(mdev); | |
379 | } else { | |
380 | dev_warn(DEV, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 PR |
381 | nps = mdev->state.pdsk; |
382 | goto out; | |
b411b363 PR |
383 | } |
384 | ||
b411b363 PR |
385 | r = drbd_khelper(mdev, "fence-peer"); |
386 | ||
387 | switch ((r>>8) & 0xff) { | |
388 | case 3: /* peer is inconsistent */ | |
389 | ex_to_string = "peer is inconsistent or worse"; | |
390 | nps = D_INCONSISTENT; | |
391 | break; | |
392 | case 4: /* peer got outdated, or was already outdated */ | |
393 | ex_to_string = "peer was fenced"; | |
394 | nps = D_OUTDATED; | |
395 | break; | |
396 | case 5: /* peer was down */ | |
397 | if (mdev->state.disk == D_UP_TO_DATE) { | |
398 | /* we will(have) create(d) a new UUID anyways... */ | |
399 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
400 | nps = D_OUTDATED; | |
401 | } else { | |
402 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
403 | nps = mdev->state.pdsk; | |
404 | } | |
405 | break; | |
406 | case 6: /* Peer is primary, voluntarily outdate myself. | |
407 | * This is useful when an unconnected R_SECONDARY is asked to | |
408 | * become R_PRIMARY, but finds the other peer being active. */ | |
409 | ex_to_string = "peer is active"; | |
410 | dev_warn(DEV, "Peer is primary, outdating myself.\n"); | |
411 | nps = D_UNKNOWN; | |
412 | _drbd_request_state(mdev, NS(disk, D_OUTDATED), CS_WAIT_COMPLETE); | |
413 | break; | |
414 | case 7: | |
415 | if (fp != FP_STONITH) | |
416 | dev_err(DEV, "fence-peer() = 7 && fencing != Stonith !!!\n"); | |
417 | ex_to_string = "peer was stonithed"; | |
418 | nps = D_OUTDATED; | |
419 | break; | |
420 | default: | |
421 | /* The script is broken ... */ | |
422 | nps = D_UNKNOWN; | |
423 | dev_err(DEV, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); | |
424 | return nps; | |
425 | } | |
426 | ||
427 | dev_info(DEV, "fence-peer helper returned %d (%s)\n", | |
428 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 PR |
429 | |
430 | out: | |
431 | if (mdev->state.susp_fen && nps >= D_UNKNOWN) { | |
432 | /* The handler was not successful... unfreeze here, the | |
433 | state engine can not unfreeze... */ | |
434 | _drbd_request_state(mdev, NS(susp_fen, 0), CS_VERBOSE); | |
435 | } | |
436 | ||
b411b363 PR |
437 | return nps; |
438 | } | |
439 | ||
87f7be4c PR |
440 | static int _try_outdate_peer_async(void *data) |
441 | { | |
442 | struct drbd_conf *mdev = (struct drbd_conf *)data; | |
443 | enum drbd_disk_state nps; | |
21423fa7 | 444 | union drbd_state ns; |
87f7be4c PR |
445 | |
446 | nps = drbd_try_outdate_peer(mdev); | |
21423fa7 PR |
447 | |
448 | /* Not using | |
449 | drbd_request_state(mdev, NS(pdsk, nps)); | |
99432fcc PR |
450 | here, because we might were able to re-establish the connection |
451 | in the meantime. This can only partially be solved in the state's | |
452 | engine is_valid_state() and is_valid_state_transition() | |
453 | functions. | |
454 | ||
455 | nps can be D_INCONSISTENT, D_OUTDATED or D_UNKNOWN. | |
456 | pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid, | |
457 | therefore we have to have the pre state change check here. | |
21423fa7 | 458 | */ |
87eeee41 | 459 | spin_lock_irq(&mdev->tconn->req_lock); |
21423fa7 PR |
460 | ns = mdev->state; |
461 | if (ns.conn < C_WF_REPORT_PARAMS) { | |
462 | ns.pdsk = nps; | |
463 | _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
464 | } | |
87eeee41 | 465 | spin_unlock_irq(&mdev->tconn->req_lock); |
87f7be4c PR |
466 | |
467 | return 0; | |
468 | } | |
469 | ||
470 | void drbd_try_outdate_peer_async(struct drbd_conf *mdev) | |
471 | { | |
472 | struct task_struct *opa; | |
473 | ||
474 | opa = kthread_run(_try_outdate_peer_async, mdev, "drbd%d_a_helper", mdev_to_minor(mdev)); | |
475 | if (IS_ERR(opa)) | |
476 | dev_err(DEV, "out of mem, failed to invoke fence-peer helper\n"); | |
477 | } | |
b411b363 | 478 | |
bf885f8a AG |
479 | enum drbd_state_rv |
480 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
481 | { |
482 | const int max_tries = 4; | |
bf885f8a | 483 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
b411b363 PR |
484 | int try = 0; |
485 | int forced = 0; | |
486 | union drbd_state mask, val; | |
487 | enum drbd_disk_state nps; | |
488 | ||
489 | if (new_role == R_PRIMARY) | |
0625ac19 | 490 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 491 | |
8410da8f | 492 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
493 | |
494 | mask.i = 0; mask.role = R_MASK; | |
495 | val.i = 0; val.role = new_role; | |
496 | ||
497 | while (try++ < max_tries) { | |
bf885f8a | 498 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
499 | |
500 | /* in case we first succeeded to outdate, | |
501 | * but now suddenly could establish a connection */ | |
bf885f8a | 502 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
503 | val.pdsk = 0; |
504 | mask.pdsk = 0; | |
505 | continue; | |
506 | } | |
507 | ||
bf885f8a | 508 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
509 | (mdev->state.disk < D_UP_TO_DATE && |
510 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
511 | mask.disk = D_MASK; |
512 | val.disk = D_UP_TO_DATE; | |
513 | forced = 1; | |
514 | continue; | |
515 | } | |
516 | ||
bf885f8a | 517 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
518 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
519 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
520 | nps = drbd_try_outdate_peer(mdev); | |
521 | ||
522 | if (nps == D_OUTDATED || nps == D_INCONSISTENT) { | |
523 | val.disk = D_UP_TO_DATE; | |
524 | mask.disk = D_MASK; | |
525 | } | |
526 | ||
527 | val.pdsk = nps; | |
528 | mask.pdsk = D_MASK; | |
529 | ||
530 | continue; | |
531 | } | |
532 | ||
bf885f8a | 533 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 534 | goto out; |
bf885f8a | 535 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
b411b363 PR |
536 | nps = drbd_try_outdate_peer(mdev); |
537 | ||
538 | if (force && nps > D_OUTDATED) { | |
539 | dev_warn(DEV, "Forced into split brain situation!\n"); | |
540 | nps = D_OUTDATED; | |
541 | } | |
542 | ||
543 | mask.pdsk = D_MASK; | |
544 | val.pdsk = nps; | |
545 | ||
546 | continue; | |
547 | } | |
bf885f8a | 548 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
549 | /* Maybe the peer is detected as dead very soon... |
550 | retry at most once more in this case. */ | |
89e58e75 | 551 | schedule_timeout_interruptible((mdev->tconn->net_conf->ping_timeo+1)*HZ/10); |
b411b363 PR |
552 | if (try < max_tries) |
553 | try = max_tries - 1; | |
554 | continue; | |
555 | } | |
bf885f8a AG |
556 | if (rv < SS_SUCCESS) { |
557 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 558 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 559 | if (rv < SS_SUCCESS) |
3b98c0c2 | 560 | goto out; |
b411b363 PR |
561 | } |
562 | break; | |
563 | } | |
564 | ||
bf885f8a | 565 | if (rv < SS_SUCCESS) |
3b98c0c2 | 566 | goto out; |
b411b363 PR |
567 | |
568 | if (forced) | |
569 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
570 | ||
571 | /* Wait until nothing is on the fly :) */ | |
572 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
573 | ||
574 | if (new_role == R_SECONDARY) { | |
81e84650 | 575 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
576 | if (get_ldev(mdev)) { |
577 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
578 | put_ldev(mdev); | |
579 | } | |
580 | } else { | |
b2fb6dbe | 581 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 582 | mdev->tconn->net_conf->want_lose = 0; |
b2fb6dbe | 583 | put_net_conf(mdev->tconn); |
b411b363 | 584 | } |
81e84650 | 585 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
586 | if (get_ldev(mdev)) { |
587 | if (((mdev->state.conn < C_CONNECTED || | |
588 | mdev->state.pdsk <= D_FAILED) | |
589 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
590 | drbd_uuid_new_current(mdev); | |
591 | ||
592 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
593 | put_ldev(mdev); | |
594 | } | |
595 | } | |
596 | ||
19f843aa LE |
597 | /* writeout of activity log covered areas of the bitmap |
598 | * to stable storage done in after state change already */ | |
b411b363 PR |
599 | |
600 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
601 | /* if this was forced, we should consider sync */ | |
602 | if (forced) | |
603 | drbd_send_uuids(mdev); | |
604 | drbd_send_state(mdev); | |
605 | } | |
606 | ||
607 | drbd_md_sync(mdev); | |
608 | ||
609 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 610 | out: |
8410da8f | 611 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 612 | return rv; |
b411b363 PR |
613 | } |
614 | ||
3b98c0c2 | 615 | static const char *from_attrs_err_to_txt(int err) |
b411b363 | 616 | { |
3b98c0c2 LE |
617 | return err == -ENOMSG ? "required attribute missing" : |
618 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
619 | "invalid attribute value"; | |
b411b363 PR |
620 | } |
621 | ||
3b98c0c2 | 622 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 623 | { |
3b98c0c2 LE |
624 | struct set_role_parms parms; |
625 | int err; | |
626 | enum drbd_ret_code retcode; | |
b411b363 | 627 | |
3b98c0c2 LE |
628 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
629 | if (!adm_ctx.reply_skb) | |
630 | return retcode; | |
631 | if (retcode != NO_ERROR) | |
632 | goto out; | |
633 | ||
634 | memset(&parms, 0, sizeof(parms)); | |
635 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
636 | err = set_role_parms_from_attrs(&parms, info->attrs); | |
637 | if (err) { | |
638 | retcode = ERR_MANDATORY_TAG; | |
639 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
640 | goto out; | |
641 | } | |
642 | } | |
643 | ||
644 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) | |
645 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
646 | else | |
647 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
648 | out: | |
649 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
650 | return 0; |
651 | } | |
652 | ||
653 | /* initializes the md.*_offset members, so we are able to find | |
654 | * the on disk meta data */ | |
655 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
656 | struct drbd_backing_dev *bdev) | |
657 | { | |
658 | sector_t md_size_sect = 0; | |
659 | switch (bdev->dc.meta_dev_idx) { | |
660 | default: | |
661 | /* v07 style fixed size indexed meta data */ | |
662 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
663 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
664 | bdev->md.al_offset = MD_AL_OFFSET; | |
665 | bdev->md.bm_offset = MD_BM_OFFSET; | |
666 | break; | |
667 | case DRBD_MD_INDEX_FLEX_EXT: | |
668 | /* just occupy the full device; unit: sectors */ | |
669 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
670 | bdev->md.md_offset = 0; | |
671 | bdev->md.al_offset = MD_AL_OFFSET; | |
672 | bdev->md.bm_offset = MD_BM_OFFSET; | |
673 | break; | |
674 | case DRBD_MD_INDEX_INTERNAL: | |
675 | case DRBD_MD_INDEX_FLEX_INT: | |
676 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
677 | /* al size is still fixed */ | |
7ad651b5 | 678 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
679 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
680 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
681 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
682 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
683 | md_size_sect = ALIGN(md_size_sect, 8); | |
684 | ||
685 | /* plus the "drbd meta data super block", | |
686 | * and the activity log; */ | |
687 | md_size_sect += MD_BM_OFFSET; | |
688 | ||
689 | bdev->md.md_size_sect = md_size_sect; | |
690 | /* bitmap offset is adjusted by 'super' block size */ | |
691 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
692 | break; | |
693 | } | |
694 | } | |
695 | ||
4b0715f0 | 696 | /* input size is expected to be in KB */ |
b411b363 PR |
697 | char *ppsize(char *buf, unsigned long long size) |
698 | { | |
4b0715f0 LE |
699 | /* Needs 9 bytes at max including trailing NUL: |
700 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
701 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
702 | int base = 0; | |
4b0715f0 | 703 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
704 | /* shift + round */ |
705 | size = (size >> 10) + !!(size & (1<<9)); | |
706 | base++; | |
707 | } | |
4b0715f0 | 708 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
709 | |
710 | return buf; | |
711 | } | |
712 | ||
713 | /* there is still a theoretical deadlock when called from receiver | |
714 | * on an D_INCONSISTENT R_PRIMARY: | |
715 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
716 | * packet from remote to dec_ap_bio again. | |
717 | * receiver receive_sizes(), comes here, | |
718 | * waits for ap_bio_cnt == 0. -> deadlock. | |
719 | * but this cannot happen, actually, because: | |
720 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
721 | * (not connected, or bad/no disk on peer): | |
722 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
723 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
724 | * peer may not initiate a resize. | |
725 | */ | |
3b98c0c2 LE |
726 | /* Note these are not to be confused with |
727 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
728 | * which are (sub) state changes triggered by admin (drbdsetup), | |
729 | * and can be long lived. | |
730 | * This changes an mdev->flag, is triggered by drbd internals, | |
731 | * and should be short-lived. */ | |
b411b363 PR |
732 | void drbd_suspend_io(struct drbd_conf *mdev) |
733 | { | |
734 | set_bit(SUSPEND_IO, &mdev->flags); | |
fb22c402 | 735 | if (is_susp(mdev->state)) |
265be2d0 | 736 | return; |
b411b363 PR |
737 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
738 | } | |
739 | ||
740 | void drbd_resume_io(struct drbd_conf *mdev) | |
741 | { | |
742 | clear_bit(SUSPEND_IO, &mdev->flags); | |
743 | wake_up(&mdev->misc_wait); | |
744 | } | |
745 | ||
746 | /** | |
747 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
748 | * @mdev: DRBD device. | |
749 | * | |
750 | * Returns 0 on success, negative return values indicate errors. | |
751 | * You should call drbd_md_sync() after calling this function. | |
752 | */ | |
24c4830c | 753 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
754 | { |
755 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
756 | sector_t la_size; | |
757 | sector_t size; | |
758 | char ppb[10]; | |
759 | ||
760 | int md_moved, la_size_changed; | |
761 | enum determine_dev_size rv = unchanged; | |
762 | ||
763 | /* race: | |
764 | * application request passes inc_ap_bio, | |
765 | * but then cannot get an AL-reference. | |
766 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
767 | * | |
768 | * to avoid that: | |
769 | * Suspend IO right here. | |
770 | * still lock the act_log to not trigger ASSERTs there. | |
771 | */ | |
772 | drbd_suspend_io(mdev); | |
773 | ||
774 | /* no wait necessary anymore, actually we could assert that */ | |
775 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
776 | ||
777 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
778 | prev_size = mdev->ldev->md.md_size_sect; | |
779 | la_size = mdev->ldev->md.la_size_sect; | |
780 | ||
781 | /* TODO: should only be some assert here, not (re)init... */ | |
782 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
783 | ||
d845030f | 784 | size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED); |
b411b363 PR |
785 | |
786 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
787 | drbd_bm_capacity(mdev) != size) { | |
788 | int err; | |
02d9a94b | 789 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
790 | if (unlikely(err)) { |
791 | /* currently there is only one error: ENOMEM! */ | |
792 | size = drbd_bm_capacity(mdev)>>1; | |
793 | if (size == 0) { | |
794 | dev_err(DEV, "OUT OF MEMORY! " | |
795 | "Could not allocate bitmap!\n"); | |
796 | } else { | |
797 | dev_err(DEV, "BM resizing failed. " | |
798 | "Leaving size unchanged at size = %lu KB\n", | |
799 | (unsigned long)size); | |
800 | } | |
801 | rv = dev_size_error; | |
802 | } | |
803 | /* racy, see comments above. */ | |
804 | drbd_set_my_capacity(mdev, size); | |
805 | mdev->ldev->md.la_size_sect = size; | |
806 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
807 | (unsigned long long)size>>1); | |
808 | } | |
809 | if (rv == dev_size_error) | |
810 | goto out; | |
811 | ||
812 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
813 | ||
814 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
815 | || prev_size != mdev->ldev->md.md_size_sect; | |
816 | ||
817 | if (la_size_changed || md_moved) { | |
24dccabb AG |
818 | int err; |
819 | ||
b411b363 PR |
820 | drbd_al_shrink(mdev); /* All extents inactive. */ |
821 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
822 | la_size_changed && md_moved ? "size changed and md moved" : | |
823 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 LE |
824 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
825 | err = drbd_bitmap_io(mdev, &drbd_bm_write, | |
826 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
827 | if (err) { |
828 | rv = dev_size_error; | |
829 | goto out; | |
830 | } | |
b411b363 PR |
831 | drbd_md_mark_dirty(mdev); |
832 | } | |
833 | ||
834 | if (size > la_size) | |
835 | rv = grew; | |
836 | if (size < la_size) | |
837 | rv = shrunk; | |
838 | out: | |
839 | lc_unlock(mdev->act_log); | |
840 | wake_up(&mdev->al_wait); | |
841 | drbd_resume_io(mdev); | |
842 | ||
843 | return rv; | |
844 | } | |
845 | ||
846 | sector_t | |
a393db6f | 847 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space) |
b411b363 PR |
848 | { |
849 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
850 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
851 | sector_t m_size; /* my size */ | |
852 | sector_t u_size = bdev->dc.disk_size; /* size requested by user. */ | |
853 | sector_t size = 0; | |
854 | ||
855 | m_size = drbd_get_max_capacity(bdev); | |
856 | ||
a393db6f PR |
857 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
858 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
859 | p_size = m_size; | |
860 | } | |
861 | ||
b411b363 PR |
862 | if (p_size && m_size) { |
863 | size = min_t(sector_t, p_size, m_size); | |
864 | } else { | |
865 | if (la_size) { | |
866 | size = la_size; | |
867 | if (m_size && m_size < size) | |
868 | size = m_size; | |
869 | if (p_size && p_size < size) | |
870 | size = p_size; | |
871 | } else { | |
872 | if (m_size) | |
873 | size = m_size; | |
874 | if (p_size) | |
875 | size = p_size; | |
876 | } | |
877 | } | |
878 | ||
879 | if (size == 0) | |
880 | dev_err(DEV, "Both nodes diskless!\n"); | |
881 | ||
882 | if (u_size) { | |
883 | if (u_size > size) | |
884 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
885 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
886 | else | |
887 | size = u_size; | |
888 | } | |
889 | ||
890 | return size; | |
891 | } | |
892 | ||
893 | /** | |
894 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
895 | * @mdev: DRBD device. | |
896 | * | |
897 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
898 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
899 | * this function. | |
900 | */ | |
901 | static int drbd_check_al_size(struct drbd_conf *mdev) | |
902 | { | |
903 | struct lru_cache *n, *t; | |
904 | struct lc_element *e; | |
905 | unsigned int in_use; | |
906 | int i; | |
907 | ||
7ad651b5 LE |
908 | if (!expect(mdev->sync_conf.al_extents >= DRBD_AL_EXTENTS_MIN)) |
909 | mdev->sync_conf.al_extents = DRBD_AL_EXTENTS_MIN; | |
b411b363 PR |
910 | |
911 | if (mdev->act_log && | |
912 | mdev->act_log->nr_elements == mdev->sync_conf.al_extents) | |
913 | return 0; | |
914 | ||
915 | in_use = 0; | |
916 | t = mdev->act_log; | |
7ad651b5 | 917 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
b411b363 PR |
918 | mdev->sync_conf.al_extents, sizeof(struct lc_element), 0); |
919 | ||
920 | if (n == NULL) { | |
921 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
922 | return -ENOMEM; | |
923 | } | |
924 | spin_lock_irq(&mdev->al_lock); | |
925 | if (t) { | |
926 | for (i = 0; i < t->nr_elements; i++) { | |
927 | e = lc_element_by_index(t, i); | |
928 | if (e->refcnt) | |
929 | dev_err(DEV, "refcnt(%d)==%d\n", | |
930 | e->lc_number, e->refcnt); | |
931 | in_use += e->refcnt; | |
932 | } | |
933 | } | |
934 | if (!in_use) | |
935 | mdev->act_log = n; | |
936 | spin_unlock_irq(&mdev->al_lock); | |
937 | if (in_use) { | |
938 | dev_err(DEV, "Activity log still in use!\n"); | |
939 | lc_destroy(n); | |
940 | return -EBUSY; | |
941 | } else { | |
942 | if (t) | |
943 | lc_destroy(t); | |
944 | } | |
945 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
946 | return 0; | |
947 | } | |
948 | ||
99432fcc | 949 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
950 | { |
951 | struct request_queue * const q = mdev->rq_queue; | |
99432fcc PR |
952 | int max_hw_sectors = max_bio_size >> 9; |
953 | int max_segments = 0; | |
954 | ||
955 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
956 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
957 | ||
958 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
959 | max_segments = mdev->ldev->dc.max_bio_bvecs; | |
960 | put_ldev(mdev); | |
961 | } | |
b411b363 | 962 | |
b411b363 | 963 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
964 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
965 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
966 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
967 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 968 | |
99432fcc PR |
969 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
970 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
971 | ||
972 | blk_queue_stack_limits(q, b); | |
973 | ||
974 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
975 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
976 | q->backing_dev_info.ra_pages, | |
977 | b->backing_dev_info.ra_pages); | |
978 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
979 | } | |
980 | put_ldev(mdev); | |
981 | } | |
982 | } | |
983 | ||
984 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
985 | { | |
986 | int now, new, local, peer; | |
987 | ||
988 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
989 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
990 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 991 | |
99432fcc PR |
992 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
993 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
994 | mdev->local_max_bio_size = local; | |
995 | put_ldev(mdev); | |
b411b363 | 996 | } |
99432fcc PR |
997 | |
998 | /* We may ignore peer limits if the peer is modern enough. | |
999 | Because new from 8.3.8 onwards the peer can use multiple | |
1000 | BIOs for a single peer_request */ | |
1001 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1002 | if (mdev->tconn->agreed_pro_version < 94) |
99432fcc | 1003 | peer = mdev->peer_max_bio_size; |
31890f4a | 1004 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc PR |
1005 | peer = DRBD_MAX_SIZE_H80_PACKET; |
1006 | else /* drbd 8.3.8 onwards */ | |
1007 | peer = DRBD_MAX_BIO_SIZE; | |
1008 | } | |
1009 | ||
1010 | new = min_t(int, local, peer); | |
1011 | ||
1012 | if (mdev->state.role == R_PRIMARY && new < now) | |
1013 | dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now); | |
1014 | ||
1015 | if (new != now) | |
1016 | dev_info(DEV, "max BIO size = %u\n", new); | |
1017 | ||
1018 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1019 | } |
1020 | ||
1021 | /* serialize deconfig (worker exiting, doing cleanup) | |
1022 | * and reconfig (drbdsetup disk, drbdsetup net) | |
1023 | * | |
c518d04f LE |
1024 | * Wait for a potentially exiting worker, then restart it, |
1025 | * or start a new one. Flush any pending work, there may still be an | |
1026 | * after_state_change queued. | |
b411b363 | 1027 | */ |
0e29d163 | 1028 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1029 | { |
0e29d163 PR |
1030 | wait_event(tconn->ping_wait, !test_and_set_bit(CONFIG_PENDING, &tconn->flags)); |
1031 | wait_event(tconn->ping_wait, !test_bit(OBJECT_DYING, &tconn->flags)); | |
1032 | drbd_thread_start(&tconn->worker); | |
1033 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1034 | } |
1035 | ||
1036 | /* if still unconfigured, stops worker again. | |
1037 | * if configured now, clears CONFIG_PENDING. | |
1038 | * wakes potential waiters */ | |
0e29d163 | 1039 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1040 | { |
0e29d163 PR |
1041 | spin_lock_irq(&tconn->req_lock); |
1042 | if (conn_all_vols_unconf(tconn)) { | |
1043 | set_bit(OBJECT_DYING, &tconn->flags); | |
1044 | drbd_thread_stop_nowait(&tconn->worker); | |
b411b363 | 1045 | } else |
0e29d163 PR |
1046 | clear_bit(CONFIG_PENDING, &tconn->flags); |
1047 | spin_unlock_irq(&tconn->req_lock); | |
1048 | wake_up(&tconn->ping_wait); | |
b411b363 PR |
1049 | } |
1050 | ||
0778286a PR |
1051 | /* Make sure IO is suspended before calling this function(). */ |
1052 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1053 | { | |
1054 | int s = 0; | |
1055 | ||
61610420 | 1056 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1057 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1058 | return; | |
1059 | } | |
1060 | ||
61610420 | 1061 | drbd_al_shrink(mdev); |
87eeee41 | 1062 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1063 | if (mdev->state.conn < C_CONNECTED) |
1064 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1065 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1066 | lc_unlock(mdev->act_log); |
0778286a PR |
1067 | |
1068 | if (s) | |
1069 | dev_info(DEV, "Suspended AL updates\n"); | |
1070 | } | |
1071 | ||
3b98c0c2 | 1072 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1073 | { |
3b98c0c2 LE |
1074 | struct drbd_conf *mdev; |
1075 | int err; | |
116676ca | 1076 | enum drbd_ret_code retcode; |
b411b363 PR |
1077 | enum determine_dev_size dd; |
1078 | sector_t max_possible_sectors; | |
1079 | sector_t min_md_device_sectors; | |
1080 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
e525fd89 | 1081 | struct block_device *bdev; |
b411b363 PR |
1082 | struct lru_cache *resync_lru = NULL; |
1083 | union drbd_state ns, os; | |
f2024e7c | 1084 | enum drbd_state_rv rv; |
b411b363 | 1085 | int cp_discovered = 0; |
b411b363 | 1086 | |
3b98c0c2 LE |
1087 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1088 | if (!adm_ctx.reply_skb) | |
1089 | return retcode; | |
1090 | if (retcode != NO_ERROR) | |
40cbf085 | 1091 | goto finish; |
3b98c0c2 LE |
1092 | |
1093 | mdev = adm_ctx.mdev; | |
0e29d163 | 1094 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1095 | |
1096 | /* if you want to reconfigure, please tear down first */ | |
1097 | if (mdev->state.disk > D_DISKLESS) { | |
1098 | retcode = ERR_DISK_CONFIGURED; | |
1099 | goto fail; | |
1100 | } | |
82f59cc6 LE |
1101 | /* It may just now have detached because of IO error. Make sure |
1102 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1103 | * e.g. if someone calls attach from the on-io-error handler, | |
1104 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1105 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1106 | |
3b98c0c2 | 1107 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1108 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1109 | if (!nbc) { | |
1110 | retcode = ERR_NOMEM; | |
1111 | goto fail; | |
1112 | } | |
1113 | ||
1114 | nbc->dc.disk_size = DRBD_DISK_SIZE_SECT_DEF; | |
1115 | nbc->dc.on_io_error = DRBD_ON_IO_ERROR_DEF; | |
1116 | nbc->dc.fencing = DRBD_FENCING_DEF; | |
1117 | nbc->dc.max_bio_bvecs = DRBD_MAX_BIO_BVECS_DEF; | |
1118 | ||
3b98c0c2 LE |
1119 | err = disk_conf_from_attrs(&nbc->dc, info->attrs); |
1120 | if (err) { | |
b411b363 | 1121 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1122 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1123 | goto fail; |
1124 | } | |
1125 | ||
3b98c0c2 | 1126 | if ((int)nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1127 | retcode = ERR_MD_IDX_INVALID; |
1128 | goto fail; | |
1129 | } | |
1130 | ||
b2fb6dbe | 1131 | if (get_net_conf(mdev->tconn)) { |
89e58e75 | 1132 | int prot = mdev->tconn->net_conf->wire_protocol; |
b2fb6dbe | 1133 | put_net_conf(mdev->tconn); |
47ff2d0a PR |
1134 | if (nbc->dc.fencing == FP_STONITH && prot == DRBD_PROT_A) { |
1135 | retcode = ERR_STONITH_AND_PROT_A; | |
1136 | goto fail; | |
1137 | } | |
1138 | } | |
1139 | ||
d4d77629 TH |
1140 | bdev = blkdev_get_by_path(nbc->dc.backing_dev, |
1141 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); | |
e525fd89 | 1142 | if (IS_ERR(bdev)) { |
b411b363 | 1143 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev, |
e525fd89 | 1144 | PTR_ERR(bdev)); |
b411b363 PR |
1145 | retcode = ERR_OPEN_DISK; |
1146 | goto fail; | |
1147 | } | |
e525fd89 TH |
1148 | nbc->backing_bdev = bdev; |
1149 | ||
1150 | /* | |
1151 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1152 | * drbd sharing one meta device. TODO in that case, paranoia | |
1153 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1154 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1155 | * should check it for you already; but if you don't, or | |
1156 | * someone fooled it, we need to double check here) | |
1157 | */ | |
d4d77629 TH |
1158 | bdev = blkdev_get_by_path(nbc->dc.meta_dev, |
1159 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, | |
3b98c0c2 | 1160 | ((int)nbc->dc.meta_dev_idx < 0) ? |
d4d77629 | 1161 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1162 | if (IS_ERR(bdev)) { |
b411b363 | 1163 | dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev, |
e525fd89 | 1164 | PTR_ERR(bdev)); |
b411b363 PR |
1165 | retcode = ERR_OPEN_MD_DISK; |
1166 | goto fail; | |
1167 | } | |
e525fd89 | 1168 | nbc->md_bdev = bdev; |
b411b363 | 1169 | |
e525fd89 TH |
1170 | if ((nbc->backing_bdev == nbc->md_bdev) != |
1171 | (nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL || | |
1172 | nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
1173 | retcode = ERR_MD_IDX_INVALID; | |
b411b363 PR |
1174 | goto fail; |
1175 | } | |
1176 | ||
1177 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1178 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1179 | offsetof(struct bm_extent, lce)); |
1180 | if (!resync_lru) { | |
1181 | retcode = ERR_NOMEM; | |
e525fd89 | 1182 | goto fail; |
b411b363 PR |
1183 | } |
1184 | ||
1185 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1186 | drbd_md_set_sector_offsets(mdev, nbc); | |
1187 | ||
1188 | if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) { | |
1189 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", | |
1190 | (unsigned long long) drbd_get_max_capacity(nbc), | |
1191 | (unsigned long long) nbc->dc.disk_size); | |
1192 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1193 | goto fail; |
b411b363 PR |
1194 | } |
1195 | ||
3b98c0c2 | 1196 | if ((int)nbc->dc.meta_dev_idx < 0) { |
b411b363 PR |
1197 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1198 | /* at least one MB, otherwise it does not make sense */ | |
1199 | min_md_device_sectors = (2<<10); | |
1200 | } else { | |
1201 | max_possible_sectors = DRBD_MAX_SECTORS; | |
1202 | min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1); | |
1203 | } | |
1204 | ||
b411b363 PR |
1205 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
1206 | retcode = ERR_MD_DISK_TO_SMALL; | |
1207 | dev_warn(DEV, "refusing attach: md-device too small, " | |
1208 | "at least %llu sectors needed for this meta-disk type\n", | |
1209 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1210 | goto fail; |
b411b363 PR |
1211 | } |
1212 | ||
1213 | /* Make sure the new disk is big enough | |
1214 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1215 | if (drbd_get_max_capacity(nbc) < | |
1216 | drbd_get_capacity(mdev->this_bdev)) { | |
1217 | retcode = ERR_DISK_TO_SMALL; | |
e525fd89 | 1218 | goto fail; |
b411b363 PR |
1219 | } |
1220 | ||
1221 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1222 | ||
1352994b LE |
1223 | if (nbc->known_size > max_possible_sectors) { |
1224 | dev_warn(DEV, "==> truncating very big lower level device " | |
1225 | "to currently maximum possible %llu sectors <==\n", | |
1226 | (unsigned long long) max_possible_sectors); | |
3b98c0c2 | 1227 | if ((int)nbc->dc.meta_dev_idx >= 0) |
1352994b LE |
1228 | dev_warn(DEV, "==>> using internal or flexible " |
1229 | "meta data may help <<==\n"); | |
1230 | } | |
1231 | ||
b411b363 PR |
1232 | drbd_suspend_io(mdev); |
1233 | /* also wait for the last barrier ack. */ | |
fb22c402 | 1234 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || is_susp(mdev->state)); |
b411b363 | 1235 | /* and for any other previously queued work */ |
a21e9298 | 1236 | drbd_flush_workqueue(mdev); |
b411b363 | 1237 | |
f2024e7c AG |
1238 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1239 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1240 | drbd_resume_io(mdev); |
f2024e7c | 1241 | if (rv < SS_SUCCESS) |
e525fd89 | 1242 | goto fail; |
b411b363 PR |
1243 | |
1244 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1245 | goto force_diskless; | |
1246 | ||
1247 | drbd_md_set_sector_offsets(mdev, nbc); | |
1248 | ||
1249 | if (!mdev->bitmap) { | |
1250 | if (drbd_bm_init(mdev)) { | |
1251 | retcode = ERR_NOMEM; | |
1252 | goto force_diskless_dec; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | retcode = drbd_md_read(mdev, nbc); | |
1257 | if (retcode != NO_ERROR) | |
1258 | goto force_diskless_dec; | |
1259 | ||
1260 | if (mdev->state.conn < C_CONNECTED && | |
1261 | mdev->state.role == R_PRIMARY && | |
1262 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1263 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1264 | (unsigned long long)mdev->ed_uuid); | |
1265 | retcode = ERR_DATA_NOT_CURRENT; | |
1266 | goto force_diskless_dec; | |
1267 | } | |
1268 | ||
1269 | /* Since we are diskless, fix the activity log first... */ | |
1270 | if (drbd_check_al_size(mdev)) { | |
1271 | retcode = ERR_NOMEM; | |
1272 | goto force_diskless_dec; | |
1273 | } | |
1274 | ||
1275 | /* Prevent shrinking of consistent devices ! */ | |
1276 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
a393db6f | 1277 | drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) { |
b411b363 PR |
1278 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
1279 | retcode = ERR_DISK_TO_SMALL; | |
1280 | goto force_diskless_dec; | |
1281 | } | |
1282 | ||
1283 | if (!drbd_al_read_log(mdev, nbc)) { | |
1284 | retcode = ERR_IO_MD_DISK; | |
1285 | goto force_diskless_dec; | |
1286 | } | |
1287 | ||
b411b363 PR |
1288 | /* Reset the "barriers don't work" bits here, then force meta data to |
1289 | * be written, to ensure we determine if barriers are supported. */ | |
1290 | if (nbc->dc.no_md_flush) | |
a8a4e51e | 1291 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1292 | else |
a8a4e51e | 1293 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1294 | |
1295 | /* Point of no return reached. | |
1296 | * Devices and memory are no longer released by error cleanup below. | |
1297 | * now mdev takes over responsibility, and the state engine should | |
1298 | * clean it up somewhere. */ | |
1299 | D_ASSERT(mdev->ldev == NULL); | |
1300 | mdev->ldev = nbc; | |
1301 | mdev->resync = resync_lru; | |
1302 | nbc = NULL; | |
1303 | resync_lru = NULL; | |
1304 | ||
2451fc3b PR |
1305 | mdev->write_ordering = WO_bdev_flush; |
1306 | drbd_bump_write_ordering(mdev, WO_bdev_flush); | |
b411b363 PR |
1307 | |
1308 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1309 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1310 | else | |
1311 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1312 | ||
894c6a94 | 1313 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
fb22c402 | 1314 | !(mdev->state.role == R_PRIMARY && mdev->state.susp_nod)) { |
b411b363 PR |
1315 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
1316 | cp_discovered = 1; | |
1317 | } | |
1318 | ||
1319 | mdev->send_cnt = 0; | |
1320 | mdev->recv_cnt = 0; | |
1321 | mdev->read_cnt = 0; | |
1322 | mdev->writ_cnt = 0; | |
1323 | ||
99432fcc | 1324 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1325 | |
1326 | /* If I am currently not R_PRIMARY, | |
1327 | * but meta data primary indicator is set, | |
1328 | * I just now recover from a hard crash, | |
1329 | * and have been R_PRIMARY before that crash. | |
1330 | * | |
1331 | * Now, if I had no connection before that crash | |
1332 | * (have been degraded R_PRIMARY), chances are that | |
1333 | * I won't find my peer now either. | |
1334 | * | |
1335 | * In that case, and _only_ in that case, | |
1336 | * we use the degr-wfc-timeout instead of the default, | |
1337 | * so we can automatically recover from a crash of a | |
1338 | * degraded but active "cluster" after a certain timeout. | |
1339 | */ | |
1340 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1341 | if (mdev->state.role != R_PRIMARY && | |
1342 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1343 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1344 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1345 | ||
24c4830c | 1346 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1347 | if (dd == dev_size_error) { |
1348 | retcode = ERR_NOMEM_BITMAP; | |
1349 | goto force_diskless_dec; | |
1350 | } else if (dd == grew) | |
1351 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1352 | ||
1353 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { | |
1354 | dev_info(DEV, "Assuming that all blocks are out of sync " | |
1355 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1356 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1357 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1358 | retcode = ERR_IO_MD_DISK; |
1359 | goto force_diskless_dec; | |
1360 | } | |
1361 | } else { | |
20ceb2b2 LE |
1362 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
1363 | "read from attaching", BM_LOCKED_MASK) < 0) { | |
b411b363 PR |
1364 | retcode = ERR_IO_MD_DISK; |
1365 | goto force_diskless_dec; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | if (cp_discovered) { | |
1370 | drbd_al_apply_to_bm(mdev); | |
20ceb2b2 LE |
1371 | if (drbd_bitmap_io(mdev, &drbd_bm_write, |
1372 | "crashed primary apply AL", BM_LOCKED_MASK)) { | |
19f843aa LE |
1373 | retcode = ERR_IO_MD_DISK; |
1374 | goto force_diskless_dec; | |
1375 | } | |
b411b363 PR |
1376 | } |
1377 | ||
0778286a PR |
1378 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1379 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1380 | ||
87eeee41 | 1381 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1382 | os = mdev->state; |
1383 | ns.i = os.i; | |
1384 | /* If MDF_CONSISTENT is not set go into inconsistent state, | |
1385 | otherwise investigate MDF_WasUpToDate... | |
1386 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1387 | otherwise into D_CONSISTENT state. | |
1388 | */ | |
1389 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1390 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1391 | ns.disk = D_CONSISTENT; | |
1392 | else | |
1393 | ns.disk = D_OUTDATED; | |
1394 | } else { | |
1395 | ns.disk = D_INCONSISTENT; | |
1396 | } | |
1397 | ||
1398 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1399 | ns.pdsk = D_OUTDATED; | |
1400 | ||
1401 | if ( ns.disk == D_CONSISTENT && | |
1402 | (ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE)) | |
1403 | ns.disk = D_UP_TO_DATE; | |
1404 | ||
1405 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1406 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1407 | this point, because drbd_request_state() modifies these | |
1408 | flags. */ | |
1409 | ||
1410 | /* In case we are C_CONNECTED postpone any decision on the new disk | |
1411 | state after the negotiation phase. */ | |
1412 | if (mdev->state.conn == C_CONNECTED) { | |
1413 | mdev->new_state_tmp.i = ns.i; | |
1414 | ns.i = os.i; | |
1415 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1416 | |
1417 | /* We expect to receive up-to-date UUIDs soon. | |
1418 | To avoid a race in receive_state, free p_uuid while | |
1419 | holding req_lock. I.e. atomic with the state change */ | |
1420 | kfree(mdev->p_uuid); | |
1421 | mdev->p_uuid = NULL; | |
b411b363 PR |
1422 | } |
1423 | ||
1424 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
1425 | ns = mdev->state; | |
87eeee41 | 1426 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1427 | |
1428 | if (rv < SS_SUCCESS) | |
1429 | goto force_diskless_dec; | |
1430 | ||
1431 | if (mdev->state.role == R_PRIMARY) | |
1432 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1433 | else | |
1434 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1435 | ||
1436 | drbd_md_mark_dirty(mdev); | |
1437 | drbd_md_sync(mdev); | |
1438 | ||
1439 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1440 | put_ldev(mdev); | |
0e29d163 | 1441 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1442 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1443 | return 0; |
1444 | ||
1445 | force_diskless_dec: | |
1446 | put_ldev(mdev); | |
1447 | force_diskless: | |
82f59cc6 | 1448 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
b411b363 | 1449 | drbd_md_sync(mdev); |
b411b363 | 1450 | fail: |
40cbf085 | 1451 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1452 | if (nbc) { |
e525fd89 TH |
1453 | if (nbc->backing_bdev) |
1454 | blkdev_put(nbc->backing_bdev, | |
1455 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1456 | if (nbc->md_bdev) | |
1457 | blkdev_put(nbc->md_bdev, | |
1458 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1459 | kfree(nbc); |
1460 | } | |
1461 | lc_destroy(resync_lru); | |
1462 | ||
40cbf085 | 1463 | finish: |
3b98c0c2 | 1464 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1465 | return 0; |
1466 | } | |
1467 | ||
85f75dd7 LE |
1468 | static int adm_detach(struct drbd_conf *mdev) |
1469 | { | |
1470 | enum drbd_ret_code retcode; | |
1471 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ | |
1472 | retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS)); | |
1473 | wait_event(mdev->misc_wait, | |
1474 | mdev->state.disk != D_DISKLESS || | |
1475 | !atomic_read(&mdev->local_cnt)); | |
1476 | drbd_resume_io(mdev); | |
1477 | return retcode; | |
1478 | } | |
1479 | ||
82f59cc6 LE |
1480 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1481 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1482 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1483 | * internal references as well. | |
1484 | * Only then we have finally detached. */ | |
3b98c0c2 | 1485 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1486 | { |
9a0d9d03 | 1487 | enum drbd_ret_code retcode; |
3b98c0c2 LE |
1488 | |
1489 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1490 | if (!adm_ctx.reply_skb) | |
1491 | return retcode; | |
1492 | if (retcode != NO_ERROR) | |
1493 | goto out; | |
1494 | ||
85f75dd7 | 1495 | retcode = adm_detach(adm_ctx.mdev); |
3b98c0c2 LE |
1496 | out: |
1497 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1498 | return 0; |
1499 | } | |
1500 | ||
3b98c0c2 | 1501 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1502 | { |
3b98c0c2 LE |
1503 | char hmac_name[CRYPTO_MAX_ALG_NAME]; |
1504 | struct drbd_conf *mdev; | |
b411b363 PR |
1505 | struct net_conf *new_conf = NULL; |
1506 | struct crypto_hash *tfm = NULL; | |
1507 | struct crypto_hash *integrity_w_tfm = NULL; | |
1508 | struct crypto_hash *integrity_r_tfm = NULL; | |
b411b363 PR |
1509 | void *int_dig_out = NULL; |
1510 | void *int_dig_in = NULL; | |
1511 | void *int_dig_vv = NULL; | |
80883197 | 1512 | struct drbd_tconn *oconn; |
3b98c0c2 | 1513 | struct drbd_tconn *tconn; |
b411b363 | 1514 | struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; |
3b98c0c2 LE |
1515 | enum drbd_ret_code retcode; |
1516 | int i; | |
1517 | int err; | |
b411b363 | 1518 | |
3b98c0c2 LE |
1519 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1520 | if (!adm_ctx.reply_skb) | |
1521 | return retcode; | |
1522 | if (retcode != NO_ERROR) | |
1523 | goto out; | |
1524 | ||
1525 | tconn = adm_ctx.tconn; | |
80883197 | 1526 | conn_reconfig_start(tconn); |
b411b363 | 1527 | |
80883197 | 1528 | if (tconn->cstate > C_STANDALONE) { |
b411b363 PR |
1529 | retcode = ERR_NET_CONFIGURED; |
1530 | goto fail; | |
1531 | } | |
1532 | ||
1533 | /* allocation not in the IO path, cqueue thread context */ | |
2db4e42e | 1534 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
b411b363 PR |
1535 | if (!new_conf) { |
1536 | retcode = ERR_NOMEM; | |
1537 | goto fail; | |
1538 | } | |
1539 | ||
b411b363 PR |
1540 | new_conf->timeout = DRBD_TIMEOUT_DEF; |
1541 | new_conf->try_connect_int = DRBD_CONNECT_INT_DEF; | |
1542 | new_conf->ping_int = DRBD_PING_INT_DEF; | |
1543 | new_conf->max_epoch_size = DRBD_MAX_EPOCH_SIZE_DEF; | |
1544 | new_conf->max_buffers = DRBD_MAX_BUFFERS_DEF; | |
1545 | new_conf->unplug_watermark = DRBD_UNPLUG_WATERMARK_DEF; | |
1546 | new_conf->sndbuf_size = DRBD_SNDBUF_SIZE_DEF; | |
1547 | new_conf->rcvbuf_size = DRBD_RCVBUF_SIZE_DEF; | |
1548 | new_conf->ko_count = DRBD_KO_COUNT_DEF; | |
1549 | new_conf->after_sb_0p = DRBD_AFTER_SB_0P_DEF; | |
1550 | new_conf->after_sb_1p = DRBD_AFTER_SB_1P_DEF; | |
1551 | new_conf->after_sb_2p = DRBD_AFTER_SB_2P_DEF; | |
1552 | new_conf->want_lose = 0; | |
1553 | new_conf->two_primaries = 0; | |
1554 | new_conf->wire_protocol = DRBD_PROT_C; | |
1555 | new_conf->ping_timeo = DRBD_PING_TIMEO_DEF; | |
1556 | new_conf->rr_conflict = DRBD_RR_CONFLICT_DEF; | |
422028b1 PR |
1557 | new_conf->on_congestion = DRBD_ON_CONGESTION_DEF; |
1558 | new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF; | |
b411b363 | 1559 | |
3b98c0c2 LE |
1560 | err = net_conf_from_attrs(new_conf, info->attrs); |
1561 | if (err) { | |
b411b363 | 1562 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1563 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1564 | goto fail; |
1565 | } | |
1566 | ||
1567 | if (new_conf->two_primaries | |
1568 | && (new_conf->wire_protocol != DRBD_PROT_C)) { | |
1569 | retcode = ERR_NOT_PROTO_C; | |
1570 | goto fail; | |
47ff2d0a PR |
1571 | } |
1572 | ||
80883197 PR |
1573 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1574 | if (get_ldev(mdev)) { | |
1575 | enum drbd_fencing_p fp = mdev->ldev->dc.fencing; | |
1576 | put_ldev(mdev); | |
1577 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) { | |
1578 | retcode = ERR_STONITH_AND_PROT_A; | |
1579 | goto fail; | |
1580 | } | |
1581 | } | |
1582 | if (mdev->state.role == R_PRIMARY && new_conf->want_lose) { | |
1583 | retcode = ERR_DISCARD; | |
47ff2d0a PR |
1584 | goto fail; |
1585 | } | |
80883197 PR |
1586 | if (!mdev->bitmap) { |
1587 | if(drbd_bm_init(mdev)) { | |
1588 | retcode = ERR_NOMEM; | |
1589 | goto fail; | |
1590 | } | |
1591 | } | |
47ff2d0a | 1592 | } |
b411b363 | 1593 | |
422028b1 PR |
1594 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) { |
1595 | retcode = ERR_CONG_NOT_PROTO_A; | |
1596 | goto fail; | |
1597 | } | |
1598 | ||
b411b363 PR |
1599 | retcode = NO_ERROR; |
1600 | ||
1601 | new_my_addr = (struct sockaddr *)&new_conf->my_addr; | |
1602 | new_peer_addr = (struct sockaddr *)&new_conf->peer_addr; | |
543cc10b LE |
1603 | |
1604 | /* No need to take drbd_cfg_mutex here. All reconfiguration is | |
1605 | * strictly serialized on genl_lock(). We are protected against | |
1606 | * concurrent reconfiguration/addition/deletion */ | |
80883197 PR |
1607 | list_for_each_entry(oconn, &drbd_tconns, all_tconn) { |
1608 | if (oconn == tconn) | |
b411b363 | 1609 | continue; |
80883197 PR |
1610 | if (get_net_conf(oconn)) { |
1611 | taken_addr = (struct sockaddr *)&oconn->net_conf->my_addr; | |
1612 | if (new_conf->my_addr_len == oconn->net_conf->my_addr_len && | |
b411b363 PR |
1613 | !memcmp(new_my_addr, taken_addr, new_conf->my_addr_len)) |
1614 | retcode = ERR_LOCAL_ADDR; | |
1615 | ||
80883197 PR |
1616 | taken_addr = (struct sockaddr *)&oconn->net_conf->peer_addr; |
1617 | if (new_conf->peer_addr_len == oconn->net_conf->peer_addr_len && | |
b411b363 PR |
1618 | !memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len)) |
1619 | retcode = ERR_PEER_ADDR; | |
1620 | ||
80883197 | 1621 | put_net_conf(oconn); |
b411b363 PR |
1622 | if (retcode != NO_ERROR) |
1623 | goto fail; | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | if (new_conf->cram_hmac_alg[0] != 0) { | |
1628 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1629 | new_conf->cram_hmac_alg); | |
1630 | tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC); | |
1631 | if (IS_ERR(tfm)) { | |
1632 | tfm = NULL; | |
1633 | retcode = ERR_AUTH_ALG; | |
1634 | goto fail; | |
1635 | } | |
1636 | ||
0798219f | 1637 | if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) { |
b411b363 PR |
1638 | retcode = ERR_AUTH_ALG_ND; |
1639 | goto fail; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | if (new_conf->integrity_alg[0]) { | |
1644 | integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1645 | if (IS_ERR(integrity_w_tfm)) { | |
1646 | integrity_w_tfm = NULL; | |
1647 | retcode=ERR_INTEGRITY_ALG; | |
1648 | goto fail; | |
1649 | } | |
1650 | ||
1651 | if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) { | |
1652 | retcode=ERR_INTEGRITY_ALG_ND; | |
1653 | goto fail; | |
1654 | } | |
1655 | ||
1656 | integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC); | |
1657 | if (IS_ERR(integrity_r_tfm)) { | |
1658 | integrity_r_tfm = NULL; | |
1659 | retcode=ERR_INTEGRITY_ALG; | |
1660 | goto fail; | |
1661 | } | |
1662 | } | |
1663 | ||
b411b363 PR |
1664 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
1665 | ||
80883197 | 1666 | /* allocation not in the IO path, cqueue thread context */ |
b411b363 PR |
1667 | if (integrity_w_tfm) { |
1668 | i = crypto_hash_digestsize(integrity_w_tfm); | |
1669 | int_dig_out = kmalloc(i, GFP_KERNEL); | |
1670 | if (!int_dig_out) { | |
1671 | retcode = ERR_NOMEM; | |
1672 | goto fail; | |
1673 | } | |
1674 | int_dig_in = kmalloc(i, GFP_KERNEL); | |
1675 | if (!int_dig_in) { | |
1676 | retcode = ERR_NOMEM; | |
1677 | goto fail; | |
1678 | } | |
1679 | int_dig_vv = kmalloc(i, GFP_KERNEL); | |
1680 | if (!int_dig_vv) { | |
1681 | retcode = ERR_NOMEM; | |
1682 | goto fail; | |
1683 | } | |
1684 | } | |
1685 | ||
80883197 PR |
1686 | conn_flush_workqueue(tconn); |
1687 | spin_lock_irq(&tconn->req_lock); | |
1688 | if (tconn->net_conf != NULL) { | |
b411b363 | 1689 | retcode = ERR_NET_CONFIGURED; |
80883197 | 1690 | spin_unlock_irq(&tconn->req_lock); |
b411b363 PR |
1691 | goto fail; |
1692 | } | |
80883197 | 1693 | tconn->net_conf = new_conf; |
b411b363 | 1694 | |
80883197 PR |
1695 | crypto_free_hash(tconn->cram_hmac_tfm); |
1696 | tconn->cram_hmac_tfm = tfm; | |
b411b363 | 1697 | |
80883197 PR |
1698 | crypto_free_hash(tconn->integrity_w_tfm); |
1699 | tconn->integrity_w_tfm = integrity_w_tfm; | |
b411b363 | 1700 | |
80883197 PR |
1701 | crypto_free_hash(tconn->integrity_r_tfm); |
1702 | tconn->integrity_r_tfm = integrity_r_tfm; | |
b411b363 | 1703 | |
80883197 PR |
1704 | kfree(tconn->int_dig_out); |
1705 | kfree(tconn->int_dig_in); | |
1706 | kfree(tconn->int_dig_vv); | |
1707 | tconn->int_dig_out=int_dig_out; | |
1708 | tconn->int_dig_in=int_dig_in; | |
1709 | tconn->int_dig_vv=int_dig_vv; | |
1710 | retcode = _conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); | |
1711 | spin_unlock_irq(&tconn->req_lock); | |
b411b363 | 1712 | |
80883197 PR |
1713 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1714 | mdev->send_cnt = 0; | |
1715 | mdev->recv_cnt = 0; | |
1716 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1717 | } | |
80883197 | 1718 | conn_reconfig_done(tconn); |
3b98c0c2 | 1719 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1720 | return 0; |
1721 | ||
1722 | fail: | |
1723 | kfree(int_dig_out); | |
1724 | kfree(int_dig_in); | |
1725 | kfree(int_dig_vv); | |
1726 | crypto_free_hash(tfm); | |
1727 | crypto_free_hash(integrity_w_tfm); | |
1728 | crypto_free_hash(integrity_r_tfm); | |
b411b363 PR |
1729 | kfree(new_conf); |
1730 | ||
80883197 | 1731 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
1732 | out: |
1733 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1734 | return 0; |
1735 | } | |
1736 | ||
85f75dd7 LE |
1737 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
1738 | { | |
1739 | enum drbd_state_rv rv; | |
1740 | if (force) { | |
1741 | spin_lock_irq(&tconn->req_lock); | |
1742 | if (tconn->cstate >= C_WF_CONNECTION) | |
1743 | _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
1744 | spin_unlock_irq(&tconn->req_lock); | |
1745 | return SS_SUCCESS; | |
1746 | } | |
1747 | ||
1748 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), 0); | |
1749 | ||
1750 | switch (rv) { | |
1751 | case SS_NOTHING_TO_DO: | |
1752 | case SS_ALREADY_STANDALONE: | |
1753 | return SS_SUCCESS; | |
1754 | case SS_PRIMARY_NOP: | |
1755 | /* Our state checking code wants to see the peer outdated. */ | |
1756 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
1757 | pdsk, D_OUTDATED), CS_VERBOSE); | |
1758 | break; | |
1759 | case SS_CW_FAILED_BY_PEER: | |
1760 | /* The peer probably wants to see us outdated. */ | |
1761 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
1762 | disk, D_OUTDATED), 0); | |
1763 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
1764 | conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); | |
1765 | rv = SS_SUCCESS; | |
1766 | } | |
1767 | break; | |
1768 | default:; | |
1769 | /* no special handling necessary */ | |
1770 | } | |
1771 | ||
1772 | return rv; | |
1773 | } | |
1774 | ||
3b98c0c2 | 1775 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1776 | { |
3b98c0c2 LE |
1777 | struct disconnect_parms parms; |
1778 | struct drbd_tconn *tconn; | |
85f75dd7 | 1779 | enum drbd_state_rv rv; |
3b98c0c2 LE |
1780 | enum drbd_ret_code retcode; |
1781 | int err; | |
2561b9c1 | 1782 | |
3b98c0c2 LE |
1783 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
1784 | if (!adm_ctx.reply_skb) | |
1785 | return retcode; | |
1786 | if (retcode != NO_ERROR) | |
2561b9c1 | 1787 | goto fail; |
3b98c0c2 LE |
1788 | |
1789 | tconn = adm_ctx.tconn; | |
1790 | memset(&parms, 0, sizeof(parms)); | |
1791 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
1792 | err = disconnect_parms_from_attrs(&parms, info->attrs); | |
1793 | if (err) { | |
1794 | retcode = ERR_MANDATORY_TAG; | |
1795 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1796 | goto fail; | |
1797 | } | |
2561b9c1 PR |
1798 | } |
1799 | ||
85f75dd7 LE |
1800 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
1801 | if (rv < SS_SUCCESS) | |
b411b363 PR |
1802 | goto fail; |
1803 | ||
df24aa45 PR |
1804 | if (wait_event_interruptible(tconn->ping_wait, |
1805 | tconn->cstate != C_DISCONNECTING)) { | |
b411b363 PR |
1806 | /* Do not test for mdev->state.conn == C_STANDALONE, since |
1807 | someone else might connect us in the mean time! */ | |
1808 | retcode = ERR_INTR; | |
1809 | goto fail; | |
1810 | } | |
1811 | ||
b411b363 PR |
1812 | retcode = NO_ERROR; |
1813 | fail: | |
3b98c0c2 | 1814 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1815 | return 0; |
1816 | } | |
1817 | ||
1818 | void resync_after_online_grow(struct drbd_conf *mdev) | |
1819 | { | |
1820 | int iass; /* I am sync source */ | |
1821 | ||
1822 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
1823 | if (mdev->state.role != mdev->state.peer) | |
1824 | iass = (mdev->state.role == R_PRIMARY); | |
1825 | else | |
25703f83 | 1826 | iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags); |
b411b363 PR |
1827 | |
1828 | if (iass) | |
1829 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
1830 | else | |
1831 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
1832 | } | |
1833 | ||
3b98c0c2 | 1834 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1835 | { |
3b98c0c2 LE |
1836 | struct resize_parms rs; |
1837 | struct drbd_conf *mdev; | |
1838 | enum drbd_ret_code retcode; | |
b411b363 | 1839 | enum determine_dev_size dd; |
6495d2c6 | 1840 | enum dds_flags ddsf; |
3b98c0c2 | 1841 | int err; |
b411b363 | 1842 | |
3b98c0c2 LE |
1843 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1844 | if (!adm_ctx.reply_skb) | |
1845 | return retcode; | |
1846 | if (retcode != NO_ERROR) | |
b411b363 | 1847 | goto fail; |
3b98c0c2 LE |
1848 | |
1849 | memset(&rs, 0, sizeof(struct resize_parms)); | |
1850 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
1851 | err = resize_parms_from_attrs(&rs, info->attrs); | |
1852 | if (err) { | |
1853 | retcode = ERR_MANDATORY_TAG; | |
1854 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1855 | goto fail; | |
1856 | } | |
b411b363 PR |
1857 | } |
1858 | ||
3b98c0c2 | 1859 | mdev = adm_ctx.mdev; |
b411b363 PR |
1860 | if (mdev->state.conn > C_CONNECTED) { |
1861 | retcode = ERR_RESIZE_RESYNC; | |
1862 | goto fail; | |
1863 | } | |
1864 | ||
1865 | if (mdev->state.role == R_SECONDARY && | |
1866 | mdev->state.peer == R_SECONDARY) { | |
1867 | retcode = ERR_NO_PRIMARY; | |
1868 | goto fail; | |
1869 | } | |
1870 | ||
1871 | if (!get_ldev(mdev)) { | |
1872 | retcode = ERR_NO_DISK; | |
1873 | goto fail; | |
1874 | } | |
1875 | ||
31890f4a | 1876 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 PR |
1877 | retcode = ERR_NEED_APV_93; |
1878 | goto fail; | |
1879 | } | |
1880 | ||
087c2492 | 1881 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 1882 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 PR |
1883 | |
1884 | mdev->ldev->dc.disk_size = (sector_t)rs.resize_size; | |
6495d2c6 | 1885 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 1886 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
1887 | drbd_md_sync(mdev); |
1888 | put_ldev(mdev); | |
1889 | if (dd == dev_size_error) { | |
1890 | retcode = ERR_NOMEM_BITMAP; | |
1891 | goto fail; | |
1892 | } | |
1893 | ||
087c2492 | 1894 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
1895 | if (dd == grew) |
1896 | set_bit(RESIZE_PENDING, &mdev->flags); | |
1897 | ||
1898 | drbd_send_uuids(mdev); | |
6495d2c6 | 1899 | drbd_send_sizes(mdev, 1, ddsf); |
b411b363 PR |
1900 | } |
1901 | ||
1902 | fail: | |
3b98c0c2 | 1903 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1904 | return 0; |
1905 | } | |
1906 | ||
3b98c0c2 | 1907 | int drbd_adm_syncer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1908 | { |
3b98c0c2 LE |
1909 | struct drbd_conf *mdev; |
1910 | enum drbd_ret_code retcode; | |
b411b363 PR |
1911 | int err; |
1912 | int ovr; /* online verify running */ | |
1913 | int rsr; /* re-sync running */ | |
1914 | struct crypto_hash *verify_tfm = NULL; | |
1915 | struct crypto_hash *csums_tfm = NULL; | |
1916 | struct syncer_conf sc; | |
1917 | cpumask_var_t new_cpu_mask; | |
778f271d PR |
1918 | int *rs_plan_s = NULL; |
1919 | int fifo_size; | |
b411b363 | 1920 | |
3b98c0c2 LE |
1921 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1922 | if (!adm_ctx.reply_skb) | |
1923 | return retcode; | |
1924 | if (retcode != NO_ERROR) | |
1925 | goto fail; | |
1926 | mdev = adm_ctx.mdev; | |
1927 | ||
b411b363 PR |
1928 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { |
1929 | retcode = ERR_NOMEM; | |
3b98c0c2 | 1930 | drbd_msg_put_info("unable to allocate cpumask"); |
b411b363 PR |
1931 | goto fail; |
1932 | } | |
1933 | ||
3b98c0c2 LE |
1934 | if (((struct drbd_genlmsghdr*)info->userhdr)->flags |
1935 | & DRBD_GENL_F_SET_DEFAULTS) { | |
b411b363 PR |
1936 | memset(&sc, 0, sizeof(struct syncer_conf)); |
1937 | sc.rate = DRBD_RATE_DEF; | |
1938 | sc.after = DRBD_AFTER_DEF; | |
1939 | sc.al_extents = DRBD_AL_EXTENTS_DEF; | |
265be2d0 | 1940 | sc.on_no_data = DRBD_ON_NO_DATA_DEF; |
9a31d716 PR |
1941 | sc.c_plan_ahead = DRBD_C_PLAN_AHEAD_DEF; |
1942 | sc.c_delay_target = DRBD_C_DELAY_TARGET_DEF; | |
1943 | sc.c_fill_target = DRBD_C_FILL_TARGET_DEF; | |
0f0601f4 LE |
1944 | sc.c_max_rate = DRBD_C_MAX_RATE_DEF; |
1945 | sc.c_min_rate = DRBD_C_MIN_RATE_DEF; | |
b411b363 PR |
1946 | } else |
1947 | memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf)); | |
1948 | ||
3b98c0c2 LE |
1949 | err = syncer_conf_from_attrs(&sc, info->attrs); |
1950 | if (err) { | |
b411b363 | 1951 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1952 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1953 | goto fail; |
1954 | } | |
1955 | ||
1956 | /* re-sync running */ | |
1957 | rsr = ( mdev->state.conn == C_SYNC_SOURCE || | |
1958 | mdev->state.conn == C_SYNC_TARGET || | |
1959 | mdev->state.conn == C_PAUSED_SYNC_S || | |
1960 | mdev->state.conn == C_PAUSED_SYNC_T ); | |
1961 | ||
1962 | if (rsr && strcmp(sc.csums_alg, mdev->sync_conf.csums_alg)) { | |
1963 | retcode = ERR_CSUMS_RESYNC_RUNNING; | |
1964 | goto fail; | |
1965 | } | |
1966 | ||
1967 | if (!rsr && sc.csums_alg[0]) { | |
1968 | csums_tfm = crypto_alloc_hash(sc.csums_alg, 0, CRYPTO_ALG_ASYNC); | |
1969 | if (IS_ERR(csums_tfm)) { | |
1970 | csums_tfm = NULL; | |
1971 | retcode = ERR_CSUMS_ALG; | |
1972 | goto fail; | |
1973 | } | |
1974 | ||
1975 | if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) { | |
1976 | retcode = ERR_CSUMS_ALG_ND; | |
1977 | goto fail; | |
1978 | } | |
1979 | } | |
1980 | ||
1981 | /* online verify running */ | |
1982 | ovr = (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T); | |
1983 | ||
1984 | if (ovr) { | |
1985 | if (strcmp(sc.verify_alg, mdev->sync_conf.verify_alg)) { | |
1986 | retcode = ERR_VERIFY_RUNNING; | |
1987 | goto fail; | |
1988 | } | |
1989 | } | |
1990 | ||
1991 | if (!ovr && sc.verify_alg[0]) { | |
1992 | verify_tfm = crypto_alloc_hash(sc.verify_alg, 0, CRYPTO_ALG_ASYNC); | |
1993 | if (IS_ERR(verify_tfm)) { | |
1994 | verify_tfm = NULL; | |
1995 | retcode = ERR_VERIFY_ALG; | |
1996 | goto fail; | |
1997 | } | |
1998 | ||
1999 | if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) { | |
2000 | retcode = ERR_VERIFY_ALG_ND; | |
2001 | goto fail; | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | /* silently ignore cpu mask on UP kernel */ | |
2006 | if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) { | |
2007 | err = __bitmap_parse(sc.cpu_mask, 32, 0, | |
2008 | cpumask_bits(new_cpu_mask), nr_cpu_ids); | |
2009 | if (err) { | |
2010 | dev_warn(DEV, "__bitmap_parse() failed with %d\n", err); | |
2011 | retcode = ERR_CPU_MASK_PARSE; | |
2012 | goto fail; | |
2013 | } | |
2014 | } | |
2015 | ||
841ce241 AG |
2016 | if (!expect(sc.rate >= 1)) |
2017 | sc.rate = 1; | |
7ad651b5 LE |
2018 | |
2019 | /* clip to allowed range */ | |
2020 | if (!expect(sc.al_extents >= DRBD_AL_EXTENTS_MIN)) | |
2021 | sc.al_extents = DRBD_AL_EXTENTS_MIN; | |
2022 | if (!expect(sc.al_extents <= DRBD_AL_EXTENTS_MAX)) | |
2023 | sc.al_extents = DRBD_AL_EXTENTS_MAX; | |
b411b363 PR |
2024 | |
2025 | /* most sanity checks done, try to assign the new sync-after | |
2026 | * dependency. need to hold the global lock in there, | |
2027 | * to avoid a race in the dependency loop check. */ | |
2028 | retcode = drbd_alter_sa(mdev, sc.after); | |
2029 | if (retcode != NO_ERROR) | |
2030 | goto fail; | |
2031 | ||
778f271d PR |
2032 | fifo_size = (sc.c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
2033 | if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) { | |
2034 | rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL); | |
2035 | if (!rs_plan_s) { | |
2036 | dev_err(DEV, "kmalloc of fifo_buffer failed"); | |
2037 | retcode = ERR_NOMEM; | |
2038 | goto fail; | |
2039 | } | |
2040 | } | |
2041 | ||
b411b363 PR |
2042 | /* ok, assign the rest of it as well. |
2043 | * lock against receive_SyncParam() */ | |
2044 | spin_lock(&mdev->peer_seq_lock); | |
2045 | mdev->sync_conf = sc; | |
2046 | ||
2047 | if (!rsr) { | |
2048 | crypto_free_hash(mdev->csums_tfm); | |
2049 | mdev->csums_tfm = csums_tfm; | |
2050 | csums_tfm = NULL; | |
2051 | } | |
2052 | ||
2053 | if (!ovr) { | |
2054 | crypto_free_hash(mdev->verify_tfm); | |
2055 | mdev->verify_tfm = verify_tfm; | |
2056 | verify_tfm = NULL; | |
2057 | } | |
778f271d PR |
2058 | |
2059 | if (fifo_size != mdev->rs_plan_s.size) { | |
2060 | kfree(mdev->rs_plan_s.values); | |
2061 | mdev->rs_plan_s.values = rs_plan_s; | |
2062 | mdev->rs_plan_s.size = fifo_size; | |
2063 | mdev->rs_planed = 0; | |
2064 | rs_plan_s = NULL; | |
2065 | } | |
2066 | ||
b411b363 PR |
2067 | spin_unlock(&mdev->peer_seq_lock); |
2068 | ||
2069 | if (get_ldev(mdev)) { | |
2070 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
2071 | drbd_al_shrink(mdev); | |
2072 | err = drbd_check_al_size(mdev); | |
2073 | lc_unlock(mdev->act_log); | |
2074 | wake_up(&mdev->al_wait); | |
2075 | ||
2076 | put_ldev(mdev); | |
2077 | drbd_md_sync(mdev); | |
2078 | ||
2079 | if (err) { | |
2080 | retcode = ERR_NOMEM; | |
2081 | goto fail; | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | if (mdev->state.conn >= C_CONNECTED) | |
2086 | drbd_send_sync_param(mdev, &sc); | |
2087 | ||
80822284 PR |
2088 | if (!cpumask_equal(mdev->tconn->cpu_mask, new_cpu_mask)) { |
2089 | cpumask_copy(mdev->tconn->cpu_mask, new_cpu_mask); | |
2090 | drbd_calc_cpu_mask(mdev->tconn); | |
e6b3ea83 PR |
2091 | mdev->tconn->receiver.reset_cpu_mask = 1; |
2092 | mdev->tconn->asender.reset_cpu_mask = 1; | |
2093 | mdev->tconn->worker.reset_cpu_mask = 1; | |
b411b363 PR |
2094 | } |
2095 | ||
2096 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
2097 | fail: | |
778f271d | 2098 | kfree(rs_plan_s); |
b411b363 PR |
2099 | free_cpumask_var(new_cpu_mask); |
2100 | crypto_free_hash(csums_tfm); | |
2101 | crypto_free_hash(verify_tfm); | |
3b98c0c2 LE |
2102 | |
2103 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2104 | return 0; |
2105 | } | |
2106 | ||
3b98c0c2 | 2107 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2108 | { |
3b98c0c2 LE |
2109 | struct drbd_conf *mdev; |
2110 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2111 | ||
2112 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2113 | if (!adm_ctx.reply_skb) | |
2114 | return retcode; | |
2115 | if (retcode != NO_ERROR) | |
2116 | goto out; | |
2117 | ||
2118 | mdev = adm_ctx.mdev; | |
b411b363 | 2119 | |
194bfb32 LE |
2120 | /* If there is still bitmap IO pending, probably because of a previous |
2121 | * resync just being finished, wait for it before requesting a new resync. */ | |
2122 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
2123 | ||
b411b363 PR |
2124 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2125 | ||
2126 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2127 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2128 | ||
2129 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2130 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2131 | if (mdev->state.conn < C_CONNECTED) |
2132 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2133 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2134 | |
2135 | if (retcode != SS_NEED_CONNECTION) | |
2136 | break; | |
2137 | ||
2138 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2139 | } | |
2140 | ||
3b98c0c2 LE |
2141 | out: |
2142 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2143 | return 0; |
2144 | } | |
2145 | ||
0778286a PR |
2146 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2147 | { | |
2148 | int rv; | |
2149 | ||
2150 | rv = drbd_bmio_set_n_write(mdev); | |
2151 | drbd_suspend_al(mdev); | |
2152 | return rv; | |
2153 | } | |
2154 | ||
3b98c0c2 LE |
2155 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2156 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2157 | { |
3b98c0c2 | 2158 | enum drbd_ret_code retcode; |
194bfb32 | 2159 | |
3b98c0c2 LE |
2160 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2161 | if (!adm_ctx.reply_skb) | |
2162 | return retcode; | |
2163 | if (retcode != NO_ERROR) | |
2164 | goto out; | |
b411b363 | 2165 | |
3b98c0c2 LE |
2166 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2167 | out: | |
2168 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2169 | return 0; |
2170 | } | |
2171 | ||
3b98c0c2 | 2172 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2173 | { |
3b98c0c2 LE |
2174 | return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); |
2175 | } | |
b411b363 | 2176 | |
3b98c0c2 LE |
2177 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
2178 | { | |
2179 | enum drbd_ret_code retcode; | |
2180 | ||
2181 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2182 | if (!adm_ctx.reply_skb) | |
2183 | return retcode; | |
2184 | if (retcode != NO_ERROR) | |
2185 | goto out; | |
b411b363 | 2186 | |
3b98c0c2 LE |
2187 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2188 | retcode = ERR_PAUSE_IS_SET; | |
2189 | out: | |
2190 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2191 | return 0; |
2192 | } | |
2193 | ||
3b98c0c2 | 2194 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2195 | { |
cd88d030 | 2196 | union drbd_state s; |
3b98c0c2 LE |
2197 | enum drbd_ret_code retcode; |
2198 | ||
2199 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2200 | if (!adm_ctx.reply_skb) | |
2201 | return retcode; | |
2202 | if (retcode != NO_ERROR) | |
2203 | goto out; | |
b411b363 | 2204 | |
3b98c0c2 LE |
2205 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2206 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2207 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2208 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2209 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2210 | } else { | |
2211 | retcode = ERR_PAUSE_IS_CLEAR; | |
2212 | } | |
2213 | } | |
b411b363 | 2214 | |
3b98c0c2 LE |
2215 | out: |
2216 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2217 | return 0; |
2218 | } | |
2219 | ||
3b98c0c2 | 2220 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2221 | { |
3b98c0c2 | 2222 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2223 | } |
2224 | ||
3b98c0c2 | 2225 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2226 | { |
3b98c0c2 LE |
2227 | struct drbd_conf *mdev; |
2228 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2229 | ||
2230 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2231 | if (!adm_ctx.reply_skb) | |
2232 | return retcode; | |
2233 | if (retcode != NO_ERROR) | |
2234 | goto out; | |
2235 | ||
2236 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2237 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2238 | drbd_uuid_new_current(mdev); | |
2239 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2240 | } |
265be2d0 | 2241 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2242 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2243 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2244 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2245 | tl_clear(mdev->tconn); |
265be2d0 | 2246 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2247 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2248 | } |
2249 | drbd_resume_io(mdev); | |
2250 | ||
3b98c0c2 LE |
2251 | out: |
2252 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2253 | return 0; |
2254 | } | |
2255 | ||
3b98c0c2 | 2256 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2257 | { |
3b98c0c2 | 2258 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2259 | } |
2260 | ||
543cc10b LE |
2261 | int nla_put_drbd_cfg_context(struct sk_buff *skb, const char *conn_name, unsigned vnr) |
2262 | { | |
2263 | struct nlattr *nla; | |
2264 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2265 | if (!nla) | |
2266 | goto nla_put_failure; | |
2267 | if (vnr != VOLUME_UNSPECIFIED) | |
2268 | NLA_PUT_U32(skb, T_ctx_volume, vnr); | |
2269 | NLA_PUT_STRING(skb, T_ctx_conn_name, conn_name); | |
2270 | nla_nest_end(skb, nla); | |
2271 | return 0; | |
2272 | ||
2273 | nla_put_failure: | |
2274 | if (nla) | |
2275 | nla_nest_cancel(skb, nla); | |
2276 | return -EMSGSIZE; | |
2277 | } | |
2278 | ||
3b98c0c2 LE |
2279 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2280 | const struct sib_info *sib) | |
b411b363 | 2281 | { |
3b98c0c2 LE |
2282 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
2283 | struct nlattr *nla; | |
2284 | int got_ldev; | |
2285 | int got_net; | |
2286 | int err = 0; | |
2287 | int exclude_sensitive; | |
2288 | ||
2289 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2290 | * to. So we better exclude_sensitive information. | |
2291 | * | |
2292 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2293 | * in the context of the requesting user process. Exclude sensitive | |
2294 | * information, unless current has superuser. | |
2295 | * | |
2296 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2297 | * relies on the current implementation of netlink_dump(), which | |
2298 | * executes the dump callback successively from netlink_recvmsg(), | |
2299 | * always in the context of the receiving process */ | |
2300 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2301 | ||
2302 | got_ldev = get_ldev(mdev); | |
2303 | got_net = get_net_conf(mdev->tconn); | |
2304 | ||
2305 | /* We need to add connection name and volume number information still. | |
2306 | * Minor number is in drbd_genlmsghdr. */ | |
543cc10b | 2307 | if (nla_put_drbd_cfg_context(skb, mdev->tconn->name, mdev->vnr)) |
3b98c0c2 | 2308 | goto nla_put_failure; |
3b98c0c2 LE |
2309 | |
2310 | if (got_ldev) | |
2311 | if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive)) | |
2312 | goto nla_put_failure; | |
2313 | if (got_net) | |
2314 | if (net_conf_to_skb(skb, mdev->tconn->net_conf, exclude_sensitive)) | |
2315 | goto nla_put_failure; | |
2316 | ||
2317 | if (syncer_conf_to_skb(skb, &mdev->sync_conf, exclude_sensitive)) | |
2318 | goto nla_put_failure; | |
2319 | ||
2320 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); | |
2321 | if (!nla) | |
2322 | goto nla_put_failure; | |
2323 | NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); | |
2324 | NLA_PUT_U32(skb, T_current_state, mdev->state.i); | |
2325 | NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); | |
2326 | NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); | |
2327 | ||
2328 | if (got_ldev) { | |
2329 | NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); | |
2330 | NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2331 | NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); | |
2332 | NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); | |
2333 | if (C_SYNC_SOURCE <= mdev->state.conn && | |
2334 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
2335 | NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); | |
2336 | NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); | |
2337 | } | |
b411b363 PR |
2338 | } |
2339 | ||
3b98c0c2 LE |
2340 | if (sib) { |
2341 | switch(sib->sib_reason) { | |
2342 | case SIB_SYNC_PROGRESS: | |
2343 | case SIB_GET_STATUS_REPLY: | |
2344 | break; | |
2345 | case SIB_STATE_CHANGE: | |
2346 | NLA_PUT_U32(skb, T_prev_state, sib->os.i); | |
2347 | NLA_PUT_U32(skb, T_new_state, sib->ns.i); | |
2348 | break; | |
2349 | case SIB_HELPER_POST: | |
2350 | NLA_PUT_U32(skb, | |
2351 | T_helper_exit_code, sib->helper_exit_code); | |
2352 | /* fall through */ | |
2353 | case SIB_HELPER_PRE: | |
2354 | NLA_PUT_STRING(skb, T_helper, sib->helper_name); | |
2355 | break; | |
2356 | } | |
b411b363 | 2357 | } |
3b98c0c2 | 2358 | nla_nest_end(skb, nla); |
b411b363 | 2359 | |
3b98c0c2 LE |
2360 | if (0) |
2361 | nla_put_failure: | |
2362 | err = -EMSGSIZE; | |
2363 | if (got_ldev) | |
2364 | put_ldev(mdev); | |
2365 | if (got_net) | |
2366 | put_net_conf(mdev->tconn); | |
2367 | return err; | |
b411b363 PR |
2368 | } |
2369 | ||
3b98c0c2 | 2370 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2371 | { |
3b98c0c2 LE |
2372 | enum drbd_ret_code retcode; |
2373 | int err; | |
b411b363 | 2374 | |
3b98c0c2 LE |
2375 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2376 | if (!adm_ctx.reply_skb) | |
2377 | return retcode; | |
2378 | if (retcode != NO_ERROR) | |
2379 | goto out; | |
b411b363 | 2380 | |
3b98c0c2 LE |
2381 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2382 | if (err) { | |
2383 | nlmsg_free(adm_ctx.reply_skb); | |
2384 | return err; | |
b411b363 | 2385 | } |
3b98c0c2 LE |
2386 | out: |
2387 | drbd_adm_finish(info, retcode); | |
2388 | return 0; | |
b411b363 PR |
2389 | } |
2390 | ||
3b98c0c2 | 2391 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2392 | { |
3b98c0c2 LE |
2393 | struct drbd_conf *mdev; |
2394 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2395 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2396 | struct drbd_tconn *tconn = NULL; | |
2397 | struct drbd_tconn *tmp; | |
2398 | unsigned volume = cb->args[1]; | |
2399 | ||
2400 | /* Open coded, deferred, iteration: | |
2401 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2402 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2403 | * ... | |
2404 | * } | |
2405 | * } | |
2406 | * where tconn is cb->args[0]; | |
2407 | * and i is cb->args[1]; | |
2408 | * | |
3b98c0c2 LE |
2409 | * This may miss entries inserted after this dump started, |
2410 | * or entries deleted before they are reached. | |
543cc10b LE |
2411 | * |
2412 | * We need to make sure the mdev won't disappear while | |
2413 | * we are looking at it, and revalidate our iterators | |
2414 | * on each iteration. | |
2415 | */ | |
3b98c0c2 | 2416 | |
543cc10b LE |
2417 | /* synchronize with drbd_new_tconn/drbd_free_tconn */ |
2418 | mutex_lock(&drbd_cfg_mutex); | |
2419 | /* synchronize with drbd_delete_device */ | |
3b98c0c2 | 2420 | rcu_read_lock(); |
543cc10b LE |
2421 | next_tconn: |
2422 | /* revalidate iterator position */ | |
2423 | list_for_each_entry(tmp, &drbd_tconns, all_tconn) { | |
2424 | if (pos == NULL) { | |
2425 | /* first iteration */ | |
2426 | pos = tmp; | |
2427 | tconn = pos; | |
2428 | break; | |
2429 | } | |
2430 | if (tmp == pos) { | |
2431 | tconn = pos; | |
2432 | break; | |
2433 | } | |
2434 | } | |
2435 | if (tconn) { | |
2436 | mdev = idr_get_next(&tconn->volumes, &volume); | |
2437 | if (!mdev) { | |
2438 | /* No more volumes to dump on this tconn. | |
2439 | * Advance tconn iterator. */ | |
2440 | pos = list_entry(tconn->all_tconn.next, | |
2441 | struct drbd_tconn, all_tconn); | |
2442 | /* But, did we dump any volume on this tconn yet? */ | |
2443 | if (volume != 0) { | |
2444 | tconn = NULL; | |
2445 | volume = 0; | |
2446 | goto next_tconn; | |
2447 | } | |
2448 | } | |
2449 | ||
3b98c0c2 LE |
2450 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, |
2451 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
2452 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2453 | if (!dh) | |
543cc10b LE |
2454 | goto out; |
2455 | ||
2456 | if (!mdev) { | |
2457 | /* this is a tconn without a single volume */ | |
2458 | dh->minor = -1U; | |
2459 | dh->ret_code = NO_ERROR; | |
2460 | if (nla_put_drbd_cfg_context(skb, tconn->name, VOLUME_UNSPECIFIED)) | |
2461 | genlmsg_cancel(skb, dh); | |
2462 | else | |
2463 | genlmsg_end(skb, dh); | |
2464 | goto out; | |
2465 | } | |
3b98c0c2 | 2466 | |
543cc10b LE |
2467 | D_ASSERT(mdev->vnr == volume); |
2468 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2469 | |
543cc10b | 2470 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2471 | dh->ret_code = NO_ERROR; |
2472 | ||
2473 | if (nla_put_status_info(skb, mdev, NULL)) { | |
2474 | genlmsg_cancel(skb, dh); | |
543cc10b | 2475 | goto out; |
3b98c0c2 LE |
2476 | } |
2477 | genlmsg_end(skb, dh); | |
2478 | } | |
b411b363 | 2479 | |
543cc10b | 2480 | out: |
3b98c0c2 | 2481 | rcu_read_unlock(); |
543cc10b LE |
2482 | mutex_unlock(&drbd_cfg_mutex); |
2483 | /* where to start the next iteration */ | |
2484 | cb->args[0] = (long)pos; | |
2485 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2486 | |
543cc10b LE |
2487 | /* No more tconns/volumes/minors found results in an empty skb. |
2488 | * Which will terminate the dump. */ | |
3b98c0c2 | 2489 | return skb->len; |
b411b363 PR |
2490 | } |
2491 | ||
3b98c0c2 | 2492 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2493 | { |
3b98c0c2 LE |
2494 | enum drbd_ret_code retcode; |
2495 | struct timeout_parms tp; | |
2496 | int err; | |
b411b363 | 2497 | |
3b98c0c2 LE |
2498 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2499 | if (!adm_ctx.reply_skb) | |
2500 | return retcode; | |
2501 | if (retcode != NO_ERROR) | |
2502 | goto out; | |
b411b363 | 2503 | |
3b98c0c2 LE |
2504 | tp.timeout_type = |
2505 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2506 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2507 | UT_DEFAULT; | |
b411b363 | 2508 | |
3b98c0c2 LE |
2509 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2510 | if (err) { | |
2511 | nlmsg_free(adm_ctx.reply_skb); | |
2512 | return err; | |
2513 | } | |
2514 | out: | |
2515 | drbd_adm_finish(info, retcode); | |
2516 | return 0; | |
b411b363 PR |
2517 | } |
2518 | ||
3b98c0c2 | 2519 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2520 | { |
3b98c0c2 LE |
2521 | struct drbd_conf *mdev; |
2522 | enum drbd_ret_code retcode; | |
b411b363 | 2523 | |
3b98c0c2 LE |
2524 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2525 | if (!adm_ctx.reply_skb) | |
2526 | return retcode; | |
2527 | if (retcode != NO_ERROR) | |
2528 | goto out; | |
873b0d5f | 2529 | |
3b98c0c2 LE |
2530 | mdev = adm_ctx.mdev; |
2531 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { | |
2532 | /* resume from last known position, if possible */ | |
2533 | struct start_ov_parms parms = | |
2534 | { .ov_start_sector = mdev->ov_start_sector }; | |
2535 | int err = start_ov_parms_from_attrs(&parms, info->attrs); | |
2536 | if (err) { | |
2537 | retcode = ERR_MANDATORY_TAG; | |
2538 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2539 | goto out; | |
2540 | } | |
2541 | /* w_make_ov_request expects position to be aligned */ | |
2542 | mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; | |
2543 | } | |
873b0d5f LE |
2544 | /* If there is still bitmap IO pending, e.g. previous resync or verify |
2545 | * just being finished, wait for it before requesting a new resync. */ | |
2546 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); | |
3b98c0c2 LE |
2547 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
2548 | out: | |
2549 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2550 | return 0; |
2551 | } | |
2552 | ||
2553 | ||
3b98c0c2 | 2554 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2555 | { |
3b98c0c2 LE |
2556 | struct drbd_conf *mdev; |
2557 | enum drbd_ret_code retcode; | |
b411b363 PR |
2558 | int skip_initial_sync = 0; |
2559 | int err; | |
3b98c0c2 | 2560 | struct new_c_uuid_parms args; |
b411b363 | 2561 | |
3b98c0c2 LE |
2562 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2563 | if (!adm_ctx.reply_skb) | |
2564 | return retcode; | |
2565 | if (retcode != NO_ERROR) | |
2566 | goto out_nolock; | |
b411b363 | 2567 | |
3b98c0c2 LE |
2568 | mdev = adm_ctx.mdev; |
2569 | memset(&args, 0, sizeof(args)); | |
2570 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
2571 | err = new_c_uuid_parms_from_attrs(&args, info->attrs); | |
2572 | if (err) { | |
2573 | retcode = ERR_MANDATORY_TAG; | |
2574 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2575 | goto out_nolock; | |
2576 | } | |
b411b363 PR |
2577 | } |
2578 | ||
8410da8f | 2579 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
2580 | |
2581 | if (!get_ldev(mdev)) { | |
2582 | retcode = ERR_NO_DISK; | |
2583 | goto out; | |
2584 | } | |
2585 | ||
2586 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 2587 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
2588 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
2589 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
2590 | skip_initial_sync = 1; | |
2591 | } else if (mdev->state.conn != C_STANDALONE) { | |
2592 | retcode = ERR_CONNECTED; | |
2593 | goto out_dec; | |
2594 | } | |
2595 | ||
2596 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
2597 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
2598 | ||
2599 | if (args.clear_bm) { | |
20ceb2b2 LE |
2600 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
2601 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
2602 | if (err) { |
2603 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
2604 | retcode = ERR_IO_MD_DISK; | |
2605 | } | |
2606 | if (skip_initial_sync) { | |
2607 | drbd_send_uuids_skip_initial_sync(mdev); | |
2608 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 2609 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 2610 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2611 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
2612 | CS_VERBOSE, NULL); | |
87eeee41 | 2613 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2614 | } |
2615 | } | |
2616 | ||
2617 | drbd_md_sync(mdev); | |
2618 | out_dec: | |
2619 | put_ldev(mdev); | |
2620 | out: | |
8410da8f | 2621 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
2622 | out_nolock: |
2623 | drbd_adm_finish(info, retcode); | |
774b3055 PR |
2624 | return 0; |
2625 | } | |
2626 | ||
3b98c0c2 LE |
2627 | static enum drbd_ret_code |
2628 | drbd_check_conn_name(const char *name) | |
774b3055 | 2629 | { |
3b98c0c2 LE |
2630 | if (!name || !name[0]) { |
2631 | drbd_msg_put_info("connection name missing"); | |
2632 | return ERR_MANDATORY_TAG; | |
774b3055 | 2633 | } |
3b98c0c2 LE |
2634 | /* if we want to use these in sysfs/configfs/debugfs some day, |
2635 | * we must not allow slashes */ | |
2636 | if (strchr(name, '/')) { | |
2637 | drbd_msg_put_info("invalid connection name"); | |
2638 | return ERR_INVALID_REQUEST; | |
774b3055 | 2639 | } |
3b98c0c2 | 2640 | return NO_ERROR; |
774b3055 PR |
2641 | } |
2642 | ||
3b98c0c2 | 2643 | int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2644 | { |
3b98c0c2 | 2645 | enum drbd_ret_code retcode; |
9f5180e5 | 2646 | |
3b98c0c2 LE |
2647 | retcode = drbd_adm_prepare(skb, info, 0); |
2648 | if (!adm_ctx.reply_skb) | |
2649 | return retcode; | |
2650 | if (retcode != NO_ERROR) | |
2651 | goto out; | |
b411b363 | 2652 | |
3b98c0c2 LE |
2653 | retcode = drbd_check_conn_name(adm_ctx.conn_name); |
2654 | if (retcode != NO_ERROR) | |
2655 | goto out; | |
b411b363 | 2656 | |
3b98c0c2 | 2657 | if (adm_ctx.tconn) { |
38f19616 LE |
2658 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
2659 | retcode = ERR_INVALID_REQUEST; | |
2660 | drbd_msg_put_info("connection exists"); | |
2661 | } | |
2662 | /* else: still NO_ERROR */ | |
3b98c0c2 | 2663 | goto out; |
b411b363 PR |
2664 | } |
2665 | ||
3b98c0c2 | 2666 | if (!drbd_new_tconn(adm_ctx.conn_name)) |
b411b363 | 2667 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
2668 | out: |
2669 | drbd_adm_finish(info, retcode); | |
2670 | return 0; | |
b411b363 PR |
2671 | } |
2672 | ||
3b98c0c2 | 2673 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2674 | { |
3b98c0c2 LE |
2675 | struct drbd_genlmsghdr *dh = info->userhdr; |
2676 | enum drbd_ret_code retcode; | |
b411b363 | 2677 | |
3b98c0c2 LE |
2678 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2679 | if (!adm_ctx.reply_skb) | |
2680 | return retcode; | |
2681 | if (retcode != NO_ERROR) | |
2682 | goto out; | |
b411b363 | 2683 | |
3b98c0c2 LE |
2684 | /* FIXME drop minor_count parameter, limit to MINORMASK */ |
2685 | if (dh->minor >= minor_count) { | |
2686 | drbd_msg_put_info("requested minor out of range"); | |
2687 | retcode = ERR_INVALID_REQUEST; | |
2688 | goto out; | |
b411b363 | 2689 | } |
3b98c0c2 LE |
2690 | /* FIXME we need a define here */ |
2691 | if (adm_ctx.volume >= 256) { | |
2692 | drbd_msg_put_info("requested volume id out of range"); | |
2693 | retcode = ERR_INVALID_REQUEST; | |
2694 | goto out; | |
b411b363 | 2695 | } |
b411b363 | 2696 | |
38f19616 LE |
2697 | /* drbd_adm_prepare made sure already |
2698 | * that mdev->tconn and mdev->vnr match the request. */ | |
2699 | if (adm_ctx.mdev) { | |
2700 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
2701 | retcode = ERR_MINOR_EXISTS; | |
2702 | /* else: still NO_ERROR */ | |
2703 | goto out; | |
2704 | } | |
2705 | ||
3b98c0c2 LE |
2706 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
2707 | out: | |
2708 | drbd_adm_finish(info, retcode); | |
2709 | return 0; | |
b411b363 PR |
2710 | } |
2711 | ||
85f75dd7 LE |
2712 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
2713 | { | |
2714 | if (mdev->state.disk == D_DISKLESS && | |
2715 | /* no need to be mdev->state.conn == C_STANDALONE && | |
2716 | * we may want to delete a minor from a live replication group. | |
2717 | */ | |
2718 | mdev->state.role == R_SECONDARY) { | |
2719 | drbd_delete_device(mdev_to_minor(mdev)); | |
2720 | return NO_ERROR; | |
2721 | } else | |
2722 | return ERR_MINOR_CONFIGURED; | |
2723 | } | |
2724 | ||
3b98c0c2 | 2725 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2726 | { |
3b98c0c2 | 2727 | enum drbd_ret_code retcode; |
b411b363 | 2728 | |
3b98c0c2 LE |
2729 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2730 | if (!adm_ctx.reply_skb) | |
2731 | return retcode; | |
2732 | if (retcode != NO_ERROR) | |
2733 | goto out; | |
b411b363 | 2734 | |
85f75dd7 LE |
2735 | mutex_lock(&drbd_cfg_mutex); |
2736 | retcode = adm_delete_minor(adm_ctx.mdev); | |
2737 | mutex_unlock(&drbd_cfg_mutex); | |
2738 | /* if this was the last volume of this connection, | |
2739 | * this will terminate all threads */ | |
2740 | if (retcode == NO_ERROR) | |
cffec5b2 | 2741 | conn_reconfig_done(adm_ctx.tconn); |
85f75dd7 LE |
2742 | out: |
2743 | drbd_adm_finish(info, retcode); | |
2744 | return 0; | |
2745 | } | |
2746 | ||
2747 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) | |
2748 | { | |
2749 | enum drbd_ret_code retcode; | |
2750 | enum drbd_state_rv rv; | |
2751 | struct drbd_conf *mdev; | |
2752 | unsigned i; | |
2753 | ||
2754 | retcode = drbd_adm_prepare(skb, info, 0); | |
2755 | if (!adm_ctx.reply_skb) | |
2756 | return retcode; | |
2757 | if (retcode != NO_ERROR) | |
2758 | goto out; | |
2759 | ||
2760 | if (!adm_ctx.tconn) { | |
2761 | retcode = ERR_CONN_NOT_KNOWN; | |
2762 | goto out; | |
2763 | } | |
2764 | ||
2765 | mutex_lock(&drbd_cfg_mutex); | |
2766 | /* demote */ | |
2767 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2768 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
2769 | if (retcode < SS_SUCCESS) { | |
2770 | drbd_msg_put_info("failed to demote"); | |
2771 | goto out_unlock; | |
2772 | } | |
2773 | } | |
2774 | ||
2775 | /* disconnect */ | |
2776 | rv = conn_try_disconnect(adm_ctx.tconn, 0); | |
2777 | if (rv < SS_SUCCESS) { | |
2778 | retcode = rv; /* enum type mismatch! */ | |
2779 | drbd_msg_put_info("failed to disconnect"); | |
2780 | goto out_unlock; | |
2781 | } | |
2782 | ||
2783 | /* detach */ | |
2784 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2785 | rv = adm_detach(mdev); | |
2786 | if (rv < SS_SUCCESS) { | |
2787 | retcode = rv; /* enum type mismatch! */ | |
2788 | drbd_msg_put_info("failed to detach"); | |
2789 | goto out_unlock; | |
2790 | } | |
2791 | } | |
2792 | ||
2793 | /* delete volumes */ | |
2794 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
2795 | retcode = adm_delete_minor(mdev); | |
2796 | if (retcode != NO_ERROR) { | |
2797 | /* "can not happen" */ | |
2798 | drbd_msg_put_info("failed to delete volume"); | |
2799 | goto out_unlock; | |
2800 | } | |
2801 | } | |
2802 | ||
2803 | /* stop all threads */ | |
2804 | conn_reconfig_done(adm_ctx.tconn); | |
2805 | ||
2806 | /* delete connection */ | |
2807 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
2808 | drbd_free_tconn(adm_ctx.tconn); | |
2809 | retcode = NO_ERROR; | |
2810 | } else { | |
2811 | /* "can not happen" */ | |
2812 | retcode = ERR_CONN_IN_USE; | |
2813 | drbd_msg_put_info("failed to delete connection"); | |
2814 | goto out_unlock; | |
2815 | } | |
2816 | out_unlock: | |
2817 | mutex_unlock(&drbd_cfg_mutex); | |
3b98c0c2 LE |
2818 | out: |
2819 | drbd_adm_finish(info, retcode); | |
2820 | return 0; | |
b411b363 PR |
2821 | } |
2822 | ||
3b98c0c2 | 2823 | int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2824 | { |
3b98c0c2 | 2825 | enum drbd_ret_code retcode; |
b411b363 | 2826 | |
3b98c0c2 LE |
2827 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); |
2828 | if (!adm_ctx.reply_skb) | |
2829 | return retcode; | |
2830 | if (retcode != NO_ERROR) | |
2831 | goto out; | |
2832 | ||
85f75dd7 | 2833 | mutex_lock(&drbd_cfg_mutex); |
3b98c0c2 LE |
2834 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { |
2835 | drbd_free_tconn(adm_ctx.tconn); | |
2836 | retcode = NO_ERROR; | |
2837 | } else { | |
2838 | retcode = ERR_CONN_IN_USE; | |
b411b363 | 2839 | } |
85f75dd7 | 2840 | mutex_unlock(&drbd_cfg_mutex); |
b411b363 | 2841 | |
3b98c0c2 LE |
2842 | out: |
2843 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2844 | return 0; |
2845 | } | |
2846 | ||
3b98c0c2 | 2847 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 2848 | { |
3b98c0c2 LE |
2849 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
2850 | struct sk_buff *msg; | |
2851 | struct drbd_genlmsghdr *d_out; | |
2852 | unsigned seq; | |
2853 | int err = -ENOMEM; | |
2854 | ||
2855 | seq = atomic_inc_return(&drbd_genl_seq); | |
2856 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
2857 | if (!msg) | |
2858 | goto failed; | |
2859 | ||
2860 | err = -EMSGSIZE; | |
2861 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
2862 | if (!d_out) /* cannot happen, but anyways. */ | |
2863 | goto nla_put_failure; | |
2864 | d_out->minor = mdev_to_minor(mdev); | |
2865 | d_out->ret_code = 0; | |
2866 | ||
2867 | if (nla_put_status_info(msg, mdev, sib)) | |
2868 | goto nla_put_failure; | |
2869 | genlmsg_end(msg, d_out); | |
2870 | err = drbd_genl_multicast_events(msg, 0); | |
2871 | /* msg has been consumed or freed in netlink_broadcast() */ | |
2872 | if (err && err != -ESRCH) | |
2873 | goto failed; | |
b411b363 | 2874 | |
3b98c0c2 | 2875 | return; |
b411b363 | 2876 | |
3b98c0c2 LE |
2877 | nla_put_failure: |
2878 | nlmsg_free(msg); | |
2879 | failed: | |
2880 | dev_err(DEV, "Error %d while broadcasting event. " | |
2881 | "Event seq:%u sib_reason:%u\n", | |
2882 | err, seq, sib->sib_reason); | |
b411b363 | 2883 | } |