Commit | Line | Data |
---|---|---|
b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
265be2d0 | 35 | #include "drbd_req.h" |
b411b363 PR |
36 | #include "drbd_wrappers.h" |
37 | #include <asm/unaligned.h> | |
b411b363 | 38 | #include <linux/drbd_limits.h> |
87f7be4c | 39 | #include <linux/kthread.h> |
b411b363 | 40 | |
3b98c0c2 LE |
41 | #include <net/genetlink.h> |
42 | ||
43 | /* .doit */ | |
44 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
45 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
46 | ||
47 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); | |
48 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); | |
49 | ||
789c1b62 AG |
50 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info); |
51 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 52 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
53 | |
54 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 56 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
57 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); |
58 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 59 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
60 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); |
61 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
62 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
63 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
64 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
65 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
66 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
67 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
68 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
69 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
70 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 71 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
72 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); |
73 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
74 | /* .dumpit */ | |
75 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
76 | ||
77 | #include <linux/drbd_genl_api.h> | |
01b39b50 | 78 | #include "drbd_nla.h" |
3b98c0c2 LE |
79 | #include <linux/genl_magic_func.h> |
80 | ||
81 | /* used blkdev_get_by_path, to claim our meta data device(s) */ | |
b411b363 PR |
82 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
83 | ||
3b98c0c2 LE |
84 | /* Configuration is strictly serialized, because generic netlink message |
85 | * processing is strictly serialized by the genl_lock(). | |
86 | * Which means we can use one static global drbd_config_context struct. | |
87 | */ | |
88 | static struct drbd_config_context { | |
89 | /* assigned from drbd_genlmsghdr */ | |
90 | unsigned int minor; | |
91 | /* assigned from request attributes, if present */ | |
92 | unsigned int volume; | |
93 | #define VOLUME_UNSPECIFIED (-1U) | |
94 | /* pointer into the request skb, | |
95 | * limited lifetime! */ | |
7c3063cc | 96 | char *resource_name; |
089c075d AG |
97 | struct nlattr *my_addr; |
98 | struct nlattr *peer_addr; | |
3b98c0c2 LE |
99 | |
100 | /* reply buffer */ | |
101 | struct sk_buff *reply_skb; | |
102 | /* pointer into reply buffer */ | |
103 | struct drbd_genlmsghdr *reply_dh; | |
104 | /* resolved from attributes, if possible */ | |
105 | struct drbd_conf *mdev; | |
106 | struct drbd_tconn *tconn; | |
107 | } adm_ctx; | |
108 | ||
109 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) | |
110 | { | |
111 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
112 | if (genlmsg_reply(skb, info)) | |
113 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 114 | } |
3b98c0c2 LE |
115 | |
116 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
117 | * reason it could fail was no space in skb, and there are 4k available. */ | |
8432b314 | 118 | int drbd_msg_put_info(const char *info) |
3b98c0c2 LE |
119 | { |
120 | struct sk_buff *skb = adm_ctx.reply_skb; | |
121 | struct nlattr *nla; | |
122 | int err = -EMSGSIZE; | |
123 | ||
124 | if (!info || !info[0]) | |
125 | return 0; | |
126 | ||
127 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
128 | if (!nla) | |
129 | return err; | |
130 | ||
131 | err = nla_put_string(skb, T_info_text, info); | |
132 | if (err) { | |
133 | nla_nest_cancel(skb, nla); | |
134 | return err; | |
135 | } else | |
136 | nla_nest_end(skb, nla); | |
137 | return 0; | |
b411b363 PR |
138 | } |
139 | ||
3b98c0c2 LE |
140 | /* This would be a good candidate for a "pre_doit" hook, |
141 | * and per-family private info->pointers. | |
142 | * But we need to stay compatible with older kernels. | |
143 | * If it returns successfully, adm_ctx members are valid. | |
144 | */ | |
145 | #define DRBD_ADM_NEED_MINOR 1 | |
44e52cfa | 146 | #define DRBD_ADM_NEED_RESOURCE 2 |
089c075d | 147 | #define DRBD_ADM_NEED_CONNECTION 4 |
3b98c0c2 LE |
148 | static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, |
149 | unsigned flags) | |
150 | { | |
151 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
152 | const u8 cmd = info->genlhdr->cmd; | |
153 | int err; | |
154 | ||
155 | memset(&adm_ctx, 0, sizeof(adm_ctx)); | |
156 | ||
157 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
98683650 | 158 | if (cmd != DRBD_ADM_GET_STATUS && !capable(CAP_NET_ADMIN)) |
3b98c0c2 LE |
159 | return -EPERM; |
160 | ||
161 | adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1e2a2551 AG |
162 | if (!adm_ctx.reply_skb) { |
163 | err = -ENOMEM; | |
3b98c0c2 | 164 | goto fail; |
1e2a2551 | 165 | } |
3b98c0c2 LE |
166 | |
167 | adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, | |
168 | info, &drbd_genl_family, 0, cmd); | |
169 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
170 | * but anyways */ | |
1e2a2551 AG |
171 | if (!adm_ctx.reply_dh) { |
172 | err = -ENOMEM; | |
3b98c0c2 | 173 | goto fail; |
1e2a2551 | 174 | } |
3b98c0c2 LE |
175 | |
176 | adm_ctx.reply_dh->minor = d_in->minor; | |
177 | adm_ctx.reply_dh->ret_code = NO_ERROR; | |
178 | ||
089c075d | 179 | adm_ctx.volume = VOLUME_UNSPECIFIED; |
3b98c0c2 LE |
180 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { |
181 | struct nlattr *nla; | |
182 | /* parse and validate only */ | |
f399002e | 183 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
184 | if (err) |
185 | goto fail; | |
186 | ||
187 | /* It was present, and valid, | |
188 | * copy it over to the reply skb. */ | |
189 | err = nla_put_nohdr(adm_ctx.reply_skb, | |
190 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, | |
191 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
192 | if (err) | |
193 | goto fail; | |
194 | ||
195 | /* and assign stuff to the global adm_ctx */ | |
196 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; | |
089c075d AG |
197 | if (nla) |
198 | adm_ctx.volume = nla_get_u32(nla); | |
7c3063cc | 199 | nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
3b98c0c2 | 200 | if (nla) |
7c3063cc | 201 | adm_ctx.resource_name = nla_data(nla); |
089c075d AG |
202 | adm_ctx.my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)]; |
203 | adm_ctx.peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)]; | |
204 | if ((adm_ctx.my_addr && | |
205 | nla_len(adm_ctx.my_addr) > sizeof(adm_ctx.tconn->my_addr)) || | |
206 | (adm_ctx.peer_addr && | |
207 | nla_len(adm_ctx.peer_addr) > sizeof(adm_ctx.tconn->peer_addr))) { | |
208 | err = -EINVAL; | |
209 | goto fail; | |
210 | } | |
211 | } | |
3b98c0c2 LE |
212 | |
213 | adm_ctx.minor = d_in->minor; | |
214 | adm_ctx.mdev = minor_to_mdev(d_in->minor); | |
7c3063cc | 215 | adm_ctx.tconn = conn_get_by_name(adm_ctx.resource_name); |
3b98c0c2 LE |
216 | |
217 | if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { | |
218 | drbd_msg_put_info("unknown minor"); | |
219 | return ERR_MINOR_INVALID; | |
220 | } | |
44e52cfa AG |
221 | if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_RESOURCE)) { |
222 | drbd_msg_put_info("unknown resource"); | |
3b98c0c2 LE |
223 | return ERR_INVALID_REQUEST; |
224 | } | |
225 | ||
089c075d AG |
226 | if (flags & DRBD_ADM_NEED_CONNECTION) { |
227 | if (adm_ctx.tconn && !(flags & DRBD_ADM_NEED_RESOURCE)) { | |
228 | drbd_msg_put_info("no resource name expected"); | |
229 | return ERR_INVALID_REQUEST; | |
230 | } | |
231 | if (adm_ctx.mdev) { | |
232 | drbd_msg_put_info("no minor number expected"); | |
233 | return ERR_INVALID_REQUEST; | |
234 | } | |
235 | if (adm_ctx.my_addr && adm_ctx.peer_addr) | |
236 | adm_ctx.tconn = conn_get_by_addrs(nla_data(adm_ctx.my_addr), | |
237 | nla_len(adm_ctx.my_addr), | |
238 | nla_data(adm_ctx.peer_addr), | |
239 | nla_len(adm_ctx.peer_addr)); | |
240 | if (!adm_ctx.tconn) { | |
241 | drbd_msg_put_info("unknown connection"); | |
242 | return ERR_INVALID_REQUEST; | |
243 | } | |
244 | } | |
245 | ||
3b98c0c2 | 246 | /* some more paranoia, if the request was over-determined */ |
527f4b24 LE |
247 | if (adm_ctx.mdev && adm_ctx.tconn && |
248 | adm_ctx.mdev->tconn != adm_ctx.tconn) { | |
44e52cfa | 249 | pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n", |
7c3063cc AG |
250 | adm_ctx.minor, adm_ctx.resource_name, |
251 | adm_ctx.mdev->tconn->name); | |
44e52cfa | 252 | drbd_msg_put_info("minor exists in different resource"); |
527f4b24 LE |
253 | return ERR_INVALID_REQUEST; |
254 | } | |
3b98c0c2 LE |
255 | if (adm_ctx.mdev && |
256 | adm_ctx.volume != VOLUME_UNSPECIFIED && | |
257 | adm_ctx.volume != adm_ctx.mdev->vnr) { | |
258 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", | |
259 | adm_ctx.minor, adm_ctx.volume, | |
260 | adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); | |
527f4b24 | 261 | drbd_msg_put_info("minor exists as different volume"); |
3b98c0c2 LE |
262 | return ERR_INVALID_REQUEST; |
263 | } | |
0ace9dfa | 264 | |
3b98c0c2 LE |
265 | return NO_ERROR; |
266 | ||
267 | fail: | |
268 | nlmsg_free(adm_ctx.reply_skb); | |
269 | adm_ctx.reply_skb = NULL; | |
1e2a2551 | 270 | return err; |
3b98c0c2 LE |
271 | } |
272 | ||
273 | static int drbd_adm_finish(struct genl_info *info, int retcode) | |
274 | { | |
0ace9dfa PR |
275 | if (adm_ctx.tconn) { |
276 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); | |
277 | adm_ctx.tconn = NULL; | |
278 | } | |
279 | ||
3b98c0c2 LE |
280 | if (!adm_ctx.reply_skb) |
281 | return -ENOMEM; | |
282 | ||
283 | adm_ctx.reply_dh->ret_code = retcode; | |
3b98c0c2 LE |
284 | drbd_adm_send_reply(adm_ctx.reply_skb, info); |
285 | return 0; | |
286 | } | |
b411b363 | 287 | |
6b75dced | 288 | static void setup_khelper_env(struct drbd_tconn *tconn, char **envp) |
b411b363 | 289 | { |
6b75dced | 290 | char *afs; |
b411b363 | 291 | |
089c075d AG |
292 | /* FIXME: A future version will not allow this case. */ |
293 | if (tconn->my_addr_len == 0 || tconn->peer_addr_len == 0) | |
294 | return; | |
295 | ||
296 | switch (((struct sockaddr *)&tconn->peer_addr)->sa_family) { | |
297 | case AF_INET6: | |
298 | afs = "ipv6"; | |
299 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", | |
300 | &((struct sockaddr_in6 *)&tconn->peer_addr)->sin6_addr); | |
b411b363 | 301 | break; |
089c075d AG |
302 | case AF_INET: |
303 | afs = "ipv4"; | |
304 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
305 | &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr); | |
b411b363 | 306 | break; |
089c075d AG |
307 | default: |
308 | afs = "ssocks"; | |
309 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
310 | &((struct sockaddr_in *)&tconn->peer_addr)->sin_addr); | |
b411b363 | 311 | } |
089c075d | 312 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
6b75dced | 313 | } |
b411b363 PR |
314 | |
315 | int drbd_khelper(struct drbd_conf *mdev, char *cmd) | |
316 | { | |
317 | char *envp[] = { "HOME=/", | |
318 | "TERM=linux", | |
319 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
6b75dced PR |
320 | (char[20]) { }, /* address family */ |
321 | (char[60]) { }, /* address */ | |
b411b363 | 322 | NULL }; |
6b75dced | 323 | char mb[12]; |
b411b363 | 324 | char *argv[] = {usermode_helper, cmd, mb, NULL }; |
6f3465ed | 325 | struct drbd_tconn *tconn = mdev->tconn; |
6b75dced | 326 | struct sib_info sib; |
b411b363 PR |
327 | int ret; |
328 | ||
6f3465ed LE |
329 | if (current == tconn->worker.task) |
330 | set_bit(CALLBACK_PENDING, &tconn->flags); | |
c2ba686f | 331 | |
b411b363 | 332 | snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); |
6f3465ed | 333 | setup_khelper_env(tconn, envp); |
b411b363 | 334 | |
1090c056 LE |
335 | /* The helper may take some time. |
336 | * write out any unsynced meta data changes now */ | |
337 | drbd_md_sync(mdev); | |
338 | ||
b411b363 | 339 | dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
340 | sib.sib_reason = SIB_HELPER_PRE; |
341 | sib.helper_name = cmd; | |
342 | drbd_bcast_event(mdev, &sib); | |
70834d30 | 343 | ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); |
b411b363 PR |
344 | if (ret) |
345 | dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
346 | usermode_helper, cmd, mb, | |
347 | (ret >> 8) & 0xff, ret); | |
348 | else | |
349 | dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", | |
350 | usermode_helper, cmd, mb, | |
351 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
352 | sib.sib_reason = SIB_HELPER_POST; |
353 | sib.helper_exit_code = ret; | |
354 | drbd_bcast_event(mdev, &sib); | |
b411b363 | 355 | |
6f3465ed LE |
356 | if (current == tconn->worker.task) |
357 | clear_bit(CALLBACK_PENDING, &tconn->flags); | |
b411b363 PR |
358 | |
359 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
360 | ret = 0; | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
6b75dced PR |
365 | int conn_khelper(struct drbd_tconn *tconn, char *cmd) |
366 | { | |
367 | char *envp[] = { "HOME=/", | |
368 | "TERM=linux", | |
369 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
370 | (char[20]) { }, /* address family */ | |
371 | (char[60]) { }, /* address */ | |
372 | NULL }; | |
373 | char *argv[] = {usermode_helper, cmd, tconn->name, NULL }; | |
374 | int ret; | |
375 | ||
376 | setup_khelper_env(tconn, envp); | |
377 | conn_md_sync(tconn); | |
378 | ||
379 | conn_info(tconn, "helper command: %s %s %s\n", usermode_helper, cmd, tconn->name); | |
380 | /* TODO: conn_bcast_event() ?? */ | |
381 | ||
98683650 | 382 | ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); |
6b75dced PR |
383 | if (ret) |
384 | conn_warn(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
385 | usermode_helper, cmd, tconn->name, | |
386 | (ret >> 8) & 0xff, ret); | |
387 | else | |
388 | conn_info(tconn, "helper command: %s %s %s exit code %u (0x%x)\n", | |
389 | usermode_helper, cmd, tconn->name, | |
390 | (ret >> 8) & 0xff, ret); | |
391 | /* TODO: conn_bcast_event() ?? */ | |
c2ba686f | 392 | |
b411b363 PR |
393 | if (ret < 0) /* Ignore any ERRNOs we got. */ |
394 | ret = 0; | |
395 | ||
396 | return ret; | |
397 | } | |
398 | ||
cb703454 | 399 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) |
b411b363 | 400 | { |
cb703454 PR |
401 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
402 | struct drbd_conf *mdev; | |
403 | int vnr; | |
404 | ||
695d08fa | 405 | rcu_read_lock(); |
cb703454 PR |
406 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
407 | if (get_ldev_if_state(mdev, D_CONSISTENT)) { | |
daeda1cc PR |
408 | fp = max_t(enum drbd_fencing_p, fp, |
409 | rcu_dereference(mdev->ldev->disk_conf)->fencing); | |
cb703454 PR |
410 | put_ldev(mdev); |
411 | } | |
412 | } | |
695d08fa | 413 | rcu_read_unlock(); |
cb703454 PR |
414 | |
415 | return fp; | |
416 | } | |
417 | ||
418 | bool conn_try_outdate_peer(struct drbd_tconn *tconn) | |
b411b363 | 419 | { |
cb703454 PR |
420 | union drbd_state mask = { }; |
421 | union drbd_state val = { }; | |
422 | enum drbd_fencing_p fp; | |
b411b363 PR |
423 | char *ex_to_string; |
424 | int r; | |
b411b363 | 425 | |
cb703454 PR |
426 | if (tconn->cstate >= C_WF_REPORT_PARAMS) { |
427 | conn_err(tconn, "Expected cstate < C_WF_REPORT_PARAMS\n"); | |
428 | return false; | |
429 | } | |
b411b363 | 430 | |
cb703454 PR |
431 | fp = highest_fencing_policy(tconn); |
432 | switch (fp) { | |
433 | case FP_NOT_AVAIL: | |
434 | conn_warn(tconn, "Not fencing peer, I'm not even Consistent myself.\n"); | |
fb22c402 | 435 | goto out; |
cb703454 PR |
436 | case FP_DONT_CARE: |
437 | return true; | |
438 | default: ; | |
b411b363 PR |
439 | } |
440 | ||
cb703454 | 441 | r = conn_khelper(tconn, "fence-peer"); |
b411b363 PR |
442 | |
443 | switch ((r>>8) & 0xff) { | |
444 | case 3: /* peer is inconsistent */ | |
445 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
446 | mask.pdsk = D_MASK; |
447 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
448 | break; |
449 | case 4: /* peer got outdated, or was already outdated */ | |
450 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
451 | mask.pdsk = D_MASK; |
452 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
453 | break; |
454 | case 5: /* peer was down */ | |
cb703454 | 455 | if (conn_highest_disk(tconn) == D_UP_TO_DATE) { |
b411b363 PR |
456 | /* we will(have) create(d) a new UUID anyways... */ |
457 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
458 | mask.pdsk = D_MASK; |
459 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
460 | } else { |
461 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
462 | } |
463 | break; | |
464 | case 6: /* Peer is primary, voluntarily outdate myself. | |
465 | * This is useful when an unconnected R_SECONDARY is asked to | |
466 | * become R_PRIMARY, but finds the other peer being active. */ | |
467 | ex_to_string = "peer is active"; | |
cb703454 PR |
468 | conn_warn(tconn, "Peer is primary, outdating myself.\n"); |
469 | mask.disk = D_MASK; | |
470 | val.disk = D_OUTDATED; | |
b411b363 PR |
471 | break; |
472 | case 7: | |
473 | if (fp != FP_STONITH) | |
cb703454 | 474 | conn_err(tconn, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 475 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
476 | mask.pdsk = D_MASK; |
477 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
478 | break; |
479 | default: | |
480 | /* The script is broken ... */ | |
cb703454 PR |
481 | conn_err(tconn, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
482 | return false; /* Eventually leave IO frozen */ | |
b411b363 PR |
483 | } |
484 | ||
cb703454 PR |
485 | conn_info(tconn, "fence-peer helper returned %d (%s)\n", |
486 | (r>>8) & 0xff, ex_to_string); | |
fb22c402 | 487 | |
cb703454 | 488 | out: |
fb22c402 | 489 | |
cb703454 PR |
490 | /* Not using |
491 | conn_request_state(tconn, mask, val, CS_VERBOSE); | |
492 | here, because we might were able to re-establish the connection in the | |
493 | meantime. */ | |
494 | spin_lock_irq(&tconn->req_lock); | |
a1096a6e | 495 | if (tconn->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &tconn->flags)) |
cb703454 PR |
496 | _conn_request_state(tconn, mask, val, CS_VERBOSE); |
497 | spin_unlock_irq(&tconn->req_lock); | |
498 | ||
499 | return conn_highest_pdsk(tconn) <= D_OUTDATED; | |
b411b363 PR |
500 | } |
501 | ||
87f7be4c PR |
502 | static int _try_outdate_peer_async(void *data) |
503 | { | |
cb703454 | 504 | struct drbd_tconn *tconn = (struct drbd_tconn *)data; |
87f7be4c | 505 | |
cb703454 | 506 | conn_try_outdate_peer(tconn); |
87f7be4c | 507 | |
9dc9fbb3 | 508 | kref_put(&tconn->kref, &conn_destroy); |
87f7be4c PR |
509 | return 0; |
510 | } | |
511 | ||
cb703454 | 512 | void conn_try_outdate_peer_async(struct drbd_tconn *tconn) |
87f7be4c PR |
513 | { |
514 | struct task_struct *opa; | |
515 | ||
9dc9fbb3 | 516 | kref_get(&tconn->kref); |
cb703454 | 517 | opa = kthread_run(_try_outdate_peer_async, tconn, "drbd_async_h"); |
9dc9fbb3 | 518 | if (IS_ERR(opa)) { |
cb703454 | 519 | conn_err(tconn, "out of mem, failed to invoke fence-peer helper\n"); |
9dc9fbb3 PR |
520 | kref_put(&tconn->kref, &conn_destroy); |
521 | } | |
87f7be4c | 522 | } |
b411b363 | 523 | |
bf885f8a AG |
524 | enum drbd_state_rv |
525 | drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) | |
b411b363 PR |
526 | { |
527 | const int max_tries = 4; | |
bf885f8a | 528 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 529 | struct net_conf *nc; |
b411b363 PR |
530 | int try = 0; |
531 | int forced = 0; | |
532 | union drbd_state mask, val; | |
b411b363 PR |
533 | |
534 | if (new_role == R_PRIMARY) | |
0625ac19 | 535 | request_ping(mdev->tconn); /* Detect a dead peer ASAP */ |
b411b363 | 536 | |
8410da8f | 537 | mutex_lock(mdev->state_mutex); |
b411b363 PR |
538 | |
539 | mask.i = 0; mask.role = R_MASK; | |
540 | val.i = 0; val.role = new_role; | |
541 | ||
542 | while (try++ < max_tries) { | |
bf885f8a | 543 | rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
544 | |
545 | /* in case we first succeeded to outdate, | |
546 | * but now suddenly could establish a connection */ | |
bf885f8a | 547 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
548 | val.pdsk = 0; |
549 | mask.pdsk = 0; | |
550 | continue; | |
551 | } | |
552 | ||
bf885f8a | 553 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
d10a33c6 PR |
554 | (mdev->state.disk < D_UP_TO_DATE && |
555 | mdev->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
556 | mask.disk = D_MASK; |
557 | val.disk = D_UP_TO_DATE; | |
558 | forced = 1; | |
559 | continue; | |
560 | } | |
561 | ||
bf885f8a | 562 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b411b363 PR |
563 | mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
564 | D_ASSERT(mdev->state.pdsk == D_UNKNOWN); | |
b411b363 | 565 | |
cb703454 | 566 | if (conn_try_outdate_peer(mdev->tconn)) { |
b411b363 PR |
567 | val.disk = D_UP_TO_DATE; |
568 | mask.disk = D_MASK; | |
569 | } | |
b411b363 PR |
570 | continue; |
571 | } | |
572 | ||
bf885f8a | 573 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 574 | goto out; |
bf885f8a | 575 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
cb703454 | 576 | if (!conn_try_outdate_peer(mdev->tconn) && force) { |
b411b363 | 577 | dev_warn(DEV, "Forced into split brain situation!\n"); |
cb703454 PR |
578 | mask.pdsk = D_MASK; |
579 | val.pdsk = D_OUTDATED; | |
b411b363 | 580 | |
cb703454 | 581 | } |
b411b363 PR |
582 | continue; |
583 | } | |
bf885f8a | 584 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
585 | /* Maybe the peer is detected as dead very soon... |
586 | retry at most once more in this case. */ | |
44ed167d PR |
587 | int timeo; |
588 | rcu_read_lock(); | |
589 | nc = rcu_dereference(mdev->tconn->net_conf); | |
590 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
591 | rcu_read_unlock(); | |
592 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
593 | if (try < max_tries) |
594 | try = max_tries - 1; | |
595 | continue; | |
596 | } | |
bf885f8a AG |
597 | if (rv < SS_SUCCESS) { |
598 | rv = _drbd_request_state(mdev, mask, val, | |
b411b363 | 599 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 600 | if (rv < SS_SUCCESS) |
3b98c0c2 | 601 | goto out; |
b411b363 PR |
602 | } |
603 | break; | |
604 | } | |
605 | ||
bf885f8a | 606 | if (rv < SS_SUCCESS) |
3b98c0c2 | 607 | goto out; |
b411b363 PR |
608 | |
609 | if (forced) | |
610 | dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); | |
611 | ||
612 | /* Wait until nothing is on the fly :) */ | |
613 | wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0); | |
614 | ||
b6dd1a89 LE |
615 | /* FIXME also wait for all pending P_BARRIER_ACK? */ |
616 | ||
b411b363 | 617 | if (new_role == R_SECONDARY) { |
81e84650 | 618 | set_disk_ro(mdev->vdisk, true); |
b411b363 PR |
619 | if (get_ldev(mdev)) { |
620 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
621 | put_ldev(mdev); | |
622 | } | |
623 | } else { | |
a0095508 | 624 | mutex_lock(&mdev->tconn->conf_update); |
91fd4dad | 625 | nc = mdev->tconn->net_conf; |
44ed167d | 626 | if (nc) |
6139f60d | 627 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
a0095508 | 628 | mutex_unlock(&mdev->tconn->conf_update); |
91fd4dad | 629 | |
81e84650 | 630 | set_disk_ro(mdev->vdisk, false); |
b411b363 PR |
631 | if (get_ldev(mdev)) { |
632 | if (((mdev->state.conn < C_CONNECTED || | |
633 | mdev->state.pdsk <= D_FAILED) | |
634 | && mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
635 | drbd_uuid_new_current(mdev); | |
636 | ||
637 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
638 | put_ldev(mdev); | |
639 | } | |
640 | } | |
641 | ||
19f843aa LE |
642 | /* writeout of activity log covered areas of the bitmap |
643 | * to stable storage done in after state change already */ | |
b411b363 PR |
644 | |
645 | if (mdev->state.conn >= C_WF_REPORT_PARAMS) { | |
646 | /* if this was forced, we should consider sync */ | |
647 | if (forced) | |
648 | drbd_send_uuids(mdev); | |
f479ea06 | 649 | drbd_send_current_state(mdev); |
b411b363 PR |
650 | } |
651 | ||
652 | drbd_md_sync(mdev); | |
653 | ||
654 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
3b98c0c2 | 655 | out: |
8410da8f | 656 | mutex_unlock(mdev->state_mutex); |
bf885f8a | 657 | return rv; |
b411b363 PR |
658 | } |
659 | ||
3b98c0c2 | 660 | static const char *from_attrs_err_to_txt(int err) |
ef50a3e3 | 661 | { |
3b98c0c2 LE |
662 | return err == -ENOMSG ? "required attribute missing" : |
663 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 664 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 665 | "invalid attribute value"; |
ef50a3e3 | 666 | } |
b411b363 | 667 | |
3b98c0c2 | 668 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 669 | { |
3b98c0c2 LE |
670 | struct set_role_parms parms; |
671 | int err; | |
672 | enum drbd_ret_code retcode; | |
b411b363 | 673 | |
3b98c0c2 LE |
674 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
675 | if (!adm_ctx.reply_skb) | |
676 | return retcode; | |
677 | if (retcode != NO_ERROR) | |
678 | goto out; | |
b411b363 | 679 | |
3b98c0c2 LE |
680 | memset(&parms, 0, sizeof(parms)); |
681 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 682 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
683 | if (err) { |
684 | retcode = ERR_MANDATORY_TAG; | |
685 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
686 | goto out; | |
687 | } | |
688 | } | |
b411b363 | 689 | |
3b98c0c2 LE |
690 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) |
691 | retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); | |
692 | else | |
693 | retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); | |
694 | out: | |
695 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
696 | return 0; |
697 | } | |
698 | ||
699 | /* initializes the md.*_offset members, so we are able to find | |
700 | * the on disk meta data */ | |
701 | static void drbd_md_set_sector_offsets(struct drbd_conf *mdev, | |
702 | struct drbd_backing_dev *bdev) | |
703 | { | |
704 | sector_t md_size_sect = 0; | |
daeda1cc PR |
705 | int meta_dev_idx; |
706 | ||
707 | rcu_read_lock(); | |
708 | meta_dev_idx = rcu_dereference(bdev->disk_conf)->meta_dev_idx; | |
709 | ||
710 | switch (meta_dev_idx) { | |
b411b363 PR |
711 | default: |
712 | /* v07 style fixed size indexed meta data */ | |
713 | bdev->md.md_size_sect = MD_RESERVED_SECT; | |
714 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
715 | bdev->md.al_offset = MD_AL_OFFSET; | |
716 | bdev->md.bm_offset = MD_BM_OFFSET; | |
717 | break; | |
718 | case DRBD_MD_INDEX_FLEX_EXT: | |
719 | /* just occupy the full device; unit: sectors */ | |
720 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
721 | bdev->md.md_offset = 0; | |
722 | bdev->md.al_offset = MD_AL_OFFSET; | |
723 | bdev->md.bm_offset = MD_BM_OFFSET; | |
724 | break; | |
725 | case DRBD_MD_INDEX_INTERNAL: | |
726 | case DRBD_MD_INDEX_FLEX_INT: | |
727 | bdev->md.md_offset = drbd_md_ss__(mdev, bdev); | |
728 | /* al size is still fixed */ | |
7ad651b5 | 729 | bdev->md.al_offset = -MD_AL_SECTORS; |
b411b363 PR |
730 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
731 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
732 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
733 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
734 | md_size_sect = ALIGN(md_size_sect, 8); | |
735 | ||
736 | /* plus the "drbd meta data super block", | |
737 | * and the activity log; */ | |
738 | md_size_sect += MD_BM_OFFSET; | |
739 | ||
740 | bdev->md.md_size_sect = md_size_sect; | |
741 | /* bitmap offset is adjusted by 'super' block size */ | |
742 | bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET; | |
743 | break; | |
744 | } | |
daeda1cc | 745 | rcu_read_unlock(); |
b411b363 PR |
746 | } |
747 | ||
4b0715f0 | 748 | /* input size is expected to be in KB */ |
b411b363 PR |
749 | char *ppsize(char *buf, unsigned long long size) |
750 | { | |
4b0715f0 LE |
751 | /* Needs 9 bytes at max including trailing NUL: |
752 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
753 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
754 | int base = 0; | |
4b0715f0 | 755 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
756 | /* shift + round */ |
757 | size = (size >> 10) + !!(size & (1<<9)); | |
758 | base++; | |
759 | } | |
4b0715f0 | 760 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
761 | |
762 | return buf; | |
763 | } | |
764 | ||
765 | /* there is still a theoretical deadlock when called from receiver | |
766 | * on an D_INCONSISTENT R_PRIMARY: | |
767 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
768 | * packet from remote to dec_ap_bio again. | |
769 | * receiver receive_sizes(), comes here, | |
770 | * waits for ap_bio_cnt == 0. -> deadlock. | |
771 | * but this cannot happen, actually, because: | |
772 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
773 | * (not connected, or bad/no disk on peer): | |
774 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
775 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
776 | * peer may not initiate a resize. | |
777 | */ | |
3b98c0c2 LE |
778 | /* Note these are not to be confused with |
779 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
780 | * which are (sub) state changes triggered by admin (drbdsetup), | |
781 | * and can be long lived. | |
782 | * This changes an mdev->flag, is triggered by drbd internals, | |
783 | * and should be short-lived. */ | |
b411b363 PR |
784 | void drbd_suspend_io(struct drbd_conf *mdev) |
785 | { | |
786 | set_bit(SUSPEND_IO, &mdev->flags); | |
2aebfabb | 787 | if (drbd_suspended(mdev)) |
265be2d0 | 788 | return; |
b411b363 PR |
789 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt)); |
790 | } | |
791 | ||
792 | void drbd_resume_io(struct drbd_conf *mdev) | |
793 | { | |
794 | clear_bit(SUSPEND_IO, &mdev->flags); | |
795 | wake_up(&mdev->misc_wait); | |
796 | } | |
797 | ||
798 | /** | |
799 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
800 | * @mdev: DRBD device. | |
801 | * | |
802 | * Returns 0 on success, negative return values indicate errors. | |
803 | * You should call drbd_md_sync() after calling this function. | |
804 | */ | |
24c4830c | 805 | enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) |
b411b363 PR |
806 | { |
807 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
ef5e44a6 | 808 | sector_t la_size, u_size; |
b411b363 PR |
809 | sector_t size; |
810 | char ppb[10]; | |
811 | ||
812 | int md_moved, la_size_changed; | |
813 | enum determine_dev_size rv = unchanged; | |
814 | ||
815 | /* race: | |
816 | * application request passes inc_ap_bio, | |
817 | * but then cannot get an AL-reference. | |
818 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
819 | * | |
820 | * to avoid that: | |
821 | * Suspend IO right here. | |
822 | * still lock the act_log to not trigger ASSERTs there. | |
823 | */ | |
824 | drbd_suspend_io(mdev); | |
825 | ||
826 | /* no wait necessary anymore, actually we could assert that */ | |
827 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); | |
828 | ||
829 | prev_first_sect = drbd_md_first_sector(mdev->ldev); | |
830 | prev_size = mdev->ldev->md.md_size_sect; | |
831 | la_size = mdev->ldev->md.la_size_sect; | |
832 | ||
833 | /* TODO: should only be some assert here, not (re)init... */ | |
834 | drbd_md_set_sector_offsets(mdev, mdev->ldev); | |
835 | ||
daeda1cc PR |
836 | rcu_read_lock(); |
837 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
838 | rcu_read_unlock(); | |
ef5e44a6 | 839 | size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED); |
b411b363 PR |
840 | |
841 | if (drbd_get_capacity(mdev->this_bdev) != size || | |
842 | drbd_bm_capacity(mdev) != size) { | |
843 | int err; | |
02d9a94b | 844 | err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
845 | if (unlikely(err)) { |
846 | /* currently there is only one error: ENOMEM! */ | |
847 | size = drbd_bm_capacity(mdev)>>1; | |
848 | if (size == 0) { | |
849 | dev_err(DEV, "OUT OF MEMORY! " | |
850 | "Could not allocate bitmap!\n"); | |
851 | } else { | |
852 | dev_err(DEV, "BM resizing failed. " | |
853 | "Leaving size unchanged at size = %lu KB\n", | |
854 | (unsigned long)size); | |
855 | } | |
856 | rv = dev_size_error; | |
857 | } | |
858 | /* racy, see comments above. */ | |
859 | drbd_set_my_capacity(mdev, size); | |
860 | mdev->ldev->md.la_size_sect = size; | |
861 | dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), | |
862 | (unsigned long long)size>>1); | |
863 | } | |
864 | if (rv == dev_size_error) | |
865 | goto out; | |
866 | ||
867 | la_size_changed = (la_size != mdev->ldev->md.la_size_sect); | |
868 | ||
869 | md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) | |
870 | || prev_size != mdev->ldev->md.md_size_sect; | |
871 | ||
872 | if (la_size_changed || md_moved) { | |
24dccabb AG |
873 | int err; |
874 | ||
b411b363 PR |
875 | drbd_al_shrink(mdev); /* All extents inactive. */ |
876 | dev_info(DEV, "Writing the whole bitmap, %s\n", | |
877 | la_size_changed && md_moved ? "size changed and md moved" : | |
878 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 | 879 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
d1aa4d04 PR |
880 | err = drbd_bitmap_io(mdev, md_moved ? &drbd_bm_write_all : &drbd_bm_write, |
881 | "size changed", BM_LOCKED_MASK); | |
24dccabb AG |
882 | if (err) { |
883 | rv = dev_size_error; | |
884 | goto out; | |
885 | } | |
b411b363 PR |
886 | drbd_md_mark_dirty(mdev); |
887 | } | |
888 | ||
889 | if (size > la_size) | |
890 | rv = grew; | |
891 | if (size < la_size) | |
892 | rv = shrunk; | |
893 | out: | |
894 | lc_unlock(mdev->act_log); | |
895 | wake_up(&mdev->al_wait); | |
896 | drbd_resume_io(mdev); | |
897 | ||
898 | return rv; | |
899 | } | |
900 | ||
901 | sector_t | |
ef5e44a6 PR |
902 | drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, |
903 | sector_t u_size, int assume_peer_has_space) | |
b411b363 PR |
904 | { |
905 | sector_t p_size = mdev->p_size; /* partner's disk size. */ | |
906 | sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */ | |
907 | sector_t m_size; /* my size */ | |
b411b363 PR |
908 | sector_t size = 0; |
909 | ||
910 | m_size = drbd_get_max_capacity(bdev); | |
911 | ||
a393db6f PR |
912 | if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) { |
913 | dev_warn(DEV, "Resize while not connected was forced by the user!\n"); | |
914 | p_size = m_size; | |
915 | } | |
916 | ||
b411b363 PR |
917 | if (p_size && m_size) { |
918 | size = min_t(sector_t, p_size, m_size); | |
919 | } else { | |
920 | if (la_size) { | |
921 | size = la_size; | |
922 | if (m_size && m_size < size) | |
923 | size = m_size; | |
924 | if (p_size && p_size < size) | |
925 | size = p_size; | |
926 | } else { | |
927 | if (m_size) | |
928 | size = m_size; | |
929 | if (p_size) | |
930 | size = p_size; | |
931 | } | |
932 | } | |
933 | ||
934 | if (size == 0) | |
935 | dev_err(DEV, "Both nodes diskless!\n"); | |
936 | ||
937 | if (u_size) { | |
938 | if (u_size > size) | |
939 | dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n", | |
940 | (unsigned long)u_size>>1, (unsigned long)size>>1); | |
941 | else | |
942 | size = u_size; | |
943 | } | |
944 | ||
945 | return size; | |
946 | } | |
947 | ||
948 | /** | |
949 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
950 | * @mdev: DRBD device. | |
951 | * | |
952 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
953 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
954 | * this function. | |
955 | */ | |
f399002e | 956 | static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc) |
b411b363 PR |
957 | { |
958 | struct lru_cache *n, *t; | |
959 | struct lc_element *e; | |
960 | unsigned int in_use; | |
961 | int i; | |
962 | ||
b411b363 | 963 | if (mdev->act_log && |
f399002e | 964 | mdev->act_log->nr_elements == dc->al_extents) |
b411b363 PR |
965 | return 0; |
966 | ||
967 | in_use = 0; | |
968 | t = mdev->act_log; | |
7ad651b5 | 969 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 970 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
971 | |
972 | if (n == NULL) { | |
973 | dev_err(DEV, "Cannot allocate act_log lru!\n"); | |
974 | return -ENOMEM; | |
975 | } | |
976 | spin_lock_irq(&mdev->al_lock); | |
977 | if (t) { | |
978 | for (i = 0; i < t->nr_elements; i++) { | |
979 | e = lc_element_by_index(t, i); | |
980 | if (e->refcnt) | |
981 | dev_err(DEV, "refcnt(%d)==%d\n", | |
982 | e->lc_number, e->refcnt); | |
983 | in_use += e->refcnt; | |
984 | } | |
985 | } | |
986 | if (!in_use) | |
987 | mdev->act_log = n; | |
988 | spin_unlock_irq(&mdev->al_lock); | |
989 | if (in_use) { | |
990 | dev_err(DEV, "Activity log still in use!\n"); | |
991 | lc_destroy(n); | |
992 | return -EBUSY; | |
993 | } else { | |
994 | if (t) | |
995 | lc_destroy(t); | |
996 | } | |
997 | drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */ | |
998 | return 0; | |
999 | } | |
1000 | ||
99432fcc | 1001 | static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) |
b411b363 PR |
1002 | { |
1003 | struct request_queue * const q = mdev->rq_queue; | |
db141b2f LE |
1004 | unsigned int max_hw_sectors = max_bio_size >> 9; |
1005 | unsigned int max_segments = 0; | |
99432fcc PR |
1006 | |
1007 | if (get_ldev_if_state(mdev, D_ATTACHING)) { | |
1008 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
1009 | ||
1010 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc PR |
1011 | rcu_read_lock(); |
1012 | max_segments = rcu_dereference(mdev->ldev->disk_conf)->max_bio_bvecs; | |
1013 | rcu_read_unlock(); | |
99432fcc PR |
1014 | put_ldev(mdev); |
1015 | } | |
b411b363 | 1016 | |
b411b363 | 1017 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
1018 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1019 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1020 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
1021 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 1022 | |
99432fcc PR |
1023 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1024 | struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue; | |
1025 | ||
1026 | blk_queue_stack_limits(q, b); | |
1027 | ||
1028 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
1029 | dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", | |
1030 | q->backing_dev_info.ra_pages, | |
1031 | b->backing_dev_info.ra_pages); | |
1032 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
1033 | } | |
1034 | put_ldev(mdev); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | void drbd_reconsider_max_bio_size(struct drbd_conf *mdev) | |
1039 | { | |
db141b2f | 1040 | unsigned int now, new, local, peer; |
99432fcc PR |
1041 | |
1042 | now = queue_max_hw_sectors(mdev->rq_queue) << 9; | |
1043 | local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1044 | peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1045 | |
99432fcc PR |
1046 | if (get_ldev_if_state(mdev, D_ATTACHING)) { |
1047 | local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9; | |
1048 | mdev->local_max_bio_size = local; | |
1049 | put_ldev(mdev); | |
b411b363 | 1050 | } |
db141b2f | 1051 | local = min(local, DRBD_MAX_BIO_SIZE); |
99432fcc PR |
1052 | |
1053 | /* We may ignore peer limits if the peer is modern enough. | |
1054 | Because new from 8.3.8 onwards the peer can use multiple | |
1055 | BIOs for a single peer_request */ | |
1056 | if (mdev->state.conn >= C_CONNECTED) { | |
31890f4a | 1057 | if (mdev->tconn->agreed_pro_version < 94) |
98683650 | 1058 | peer = min( mdev->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET); |
6809384c | 1059 | /* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */ |
31890f4a | 1060 | else if (mdev->tconn->agreed_pro_version == 94) |
99432fcc | 1061 | peer = DRBD_MAX_SIZE_H80_PACKET; |
2ffca4f3 PR |
1062 | else if (mdev->tconn->agreed_pro_version < 100) |
1063 | peer = DRBD_MAX_BIO_SIZE_P95; /* drbd 8.3.8 onwards, before 8.4.0 */ | |
1064 | else | |
99432fcc PR |
1065 | peer = DRBD_MAX_BIO_SIZE; |
1066 | } | |
1067 | ||
db141b2f | 1068 | new = min(local, peer); |
99432fcc PR |
1069 | |
1070 | if (mdev->state.role == R_PRIMARY && new < now) | |
db141b2f | 1071 | dev_err(DEV, "ASSERT FAILED new < now; (%u < %u)\n", new, now); |
99432fcc PR |
1072 | |
1073 | if (new != now) | |
1074 | dev_info(DEV, "max BIO size = %u\n", new); | |
1075 | ||
1076 | drbd_setup_queue_param(mdev, new); | |
b411b363 PR |
1077 | } |
1078 | ||
a18e9d1e | 1079 | /* Starts the worker thread */ |
0e29d163 | 1080 | static void conn_reconfig_start(struct drbd_tconn *tconn) |
b411b363 | 1081 | { |
0e29d163 PR |
1082 | drbd_thread_start(&tconn->worker); |
1083 | conn_flush_workqueue(tconn); | |
b411b363 PR |
1084 | } |
1085 | ||
a18e9d1e | 1086 | /* if still unconfigured, stops worker again. */ |
0e29d163 | 1087 | static void conn_reconfig_done(struct drbd_tconn *tconn) |
b411b363 | 1088 | { |
992d6e91 | 1089 | bool stop_threads; |
0e29d163 | 1090 | spin_lock_irq(&tconn->req_lock); |
e0e16653 PR |
1091 | stop_threads = conn_all_vols_unconf(tconn) && |
1092 | tconn->cstate == C_STANDALONE; | |
0e29d163 | 1093 | spin_unlock_irq(&tconn->req_lock); |
992d6e91 LE |
1094 | if (stop_threads) { |
1095 | /* asender is implicitly stopped by receiver | |
81fa2e67 | 1096 | * in conn_disconnect() */ |
992d6e91 LE |
1097 | drbd_thread_stop(&tconn->receiver); |
1098 | drbd_thread_stop(&tconn->worker); | |
1099 | } | |
b411b363 PR |
1100 | } |
1101 | ||
0778286a PR |
1102 | /* Make sure IO is suspended before calling this function(). */ |
1103 | static void drbd_suspend_al(struct drbd_conf *mdev) | |
1104 | { | |
1105 | int s = 0; | |
1106 | ||
61610420 | 1107 | if (!lc_try_lock(mdev->act_log)) { |
0778286a PR |
1108 | dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n"); |
1109 | return; | |
1110 | } | |
1111 | ||
61610420 | 1112 | drbd_al_shrink(mdev); |
87eeee41 | 1113 | spin_lock_irq(&mdev->tconn->req_lock); |
0778286a PR |
1114 | if (mdev->state.conn < C_CONNECTED) |
1115 | s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); | |
87eeee41 | 1116 | spin_unlock_irq(&mdev->tconn->req_lock); |
61610420 | 1117 | lc_unlock(mdev->act_log); |
0778286a PR |
1118 | |
1119 | if (s) | |
1120 | dev_info(DEV, "Suspended AL updates\n"); | |
1121 | } | |
1122 | ||
5979e361 LE |
1123 | |
1124 | static bool should_set_defaults(struct genl_info *info) | |
1125 | { | |
1126 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1127 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1128 | } | |
1129 | ||
d589a21e PR |
1130 | static void enforce_disk_conf_limits(struct disk_conf *dc) |
1131 | { | |
1132 | if (dc->al_extents < DRBD_AL_EXTENTS_MIN) | |
1133 | dc->al_extents = DRBD_AL_EXTENTS_MIN; | |
1134 | if (dc->al_extents > DRBD_AL_EXTENTS_MAX) | |
1135 | dc->al_extents = DRBD_AL_EXTENTS_MAX; | |
1136 | ||
1137 | if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1138 | dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
1139 | } | |
1140 | ||
f399002e LE |
1141 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1142 | { | |
1143 | enum drbd_ret_code retcode; | |
1144 | struct drbd_conf *mdev; | |
daeda1cc | 1145 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1146 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1147 | int err, fifo_size; |
f399002e LE |
1148 | |
1149 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
1150 | if (!adm_ctx.reply_skb) | |
1151 | return retcode; | |
1152 | if (retcode != NO_ERROR) | |
1153 | goto out; | |
1154 | ||
1155 | mdev = adm_ctx.mdev; | |
1156 | ||
1157 | /* we also need a disk | |
1158 | * to change the options on */ | |
1159 | if (!get_ldev(mdev)) { | |
1160 | retcode = ERR_NO_DISK; | |
1161 | goto out; | |
1162 | } | |
1163 | ||
daeda1cc | 1164 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1165 | if (!new_disk_conf) { |
f399002e LE |
1166 | retcode = ERR_NOMEM; |
1167 | goto fail; | |
1168 | } | |
1169 | ||
daeda1cc PR |
1170 | mutex_lock(&mdev->tconn->conf_update); |
1171 | old_disk_conf = mdev->ldev->disk_conf; | |
1172 | *new_disk_conf = *old_disk_conf; | |
5979e361 | 1173 | if (should_set_defaults(info)) |
b966b5dd | 1174 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1175 | |
5ecc72c3 | 1176 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1177 | if (err && err != -ENOMSG) { |
f399002e LE |
1178 | retcode = ERR_MANDATORY_TAG; |
1179 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1180 | } | |
1181 | ||
5ecc72c3 LE |
1182 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1183 | new_disk_conf->resync_rate = 1; | |
f399002e | 1184 | |
d589a21e | 1185 | enforce_disk_conf_limits(new_disk_conf); |
f399002e | 1186 | |
5ecc72c3 | 1187 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
9958c857 | 1188 | if (fifo_size != mdev->rs_plan_s->size) { |
813472ce PR |
1189 | new_plan = fifo_alloc(fifo_size); |
1190 | if (!new_plan) { | |
f399002e LE |
1191 | dev_err(DEV, "kmalloc of fifo_buffer failed"); |
1192 | retcode = ERR_NOMEM; | |
daeda1cc | 1193 | goto fail_unlock; |
f399002e LE |
1194 | } |
1195 | } | |
1196 | ||
0ee98e2e | 1197 | drbd_suspend_io(mdev); |
f399002e LE |
1198 | wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); |
1199 | drbd_al_shrink(mdev); | |
5ecc72c3 | 1200 | err = drbd_check_al_size(mdev, new_disk_conf); |
f399002e LE |
1201 | lc_unlock(mdev->act_log); |
1202 | wake_up(&mdev->al_wait); | |
0ee98e2e | 1203 | drbd_resume_io(mdev); |
f399002e LE |
1204 | |
1205 | if (err) { | |
1206 | retcode = ERR_NOMEM; | |
daeda1cc | 1207 | goto fail_unlock; |
f399002e LE |
1208 | } |
1209 | ||
dc97b708 | 1210 | write_lock_irq(&global_state_lock); |
95f8efd0 | 1211 | retcode = drbd_resync_after_valid(mdev, new_disk_conf->resync_after); |
dc97b708 | 1212 | if (retcode == NO_ERROR) { |
daeda1cc | 1213 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); |
95f8efd0 | 1214 | drbd_resync_after_changed(mdev); |
dc97b708 PR |
1215 | } |
1216 | write_unlock_irq(&global_state_lock); | |
f399002e | 1217 | |
daeda1cc PR |
1218 | if (retcode != NO_ERROR) |
1219 | goto fail_unlock; | |
f399002e | 1220 | |
813472ce PR |
1221 | if (new_plan) { |
1222 | old_plan = mdev->rs_plan_s; | |
1223 | rcu_assign_pointer(mdev->rs_plan_s, new_plan); | |
9958c857 | 1224 | } |
9958c857 | 1225 | |
c141ebda | 1226 | mutex_unlock(&mdev->tconn->conf_update); |
27eb13e9 | 1227 | |
9a51ab1c | 1228 | if (new_disk_conf->al_updates) |
4035e4c2 | 1229 | mdev->ldev->md.flags &= ~MDF_AL_DISABLED; |
9a51ab1c PR |
1230 | else |
1231 | mdev->ldev->md.flags |= MDF_AL_DISABLED; | |
1232 | ||
691631c0 LE |
1233 | if (new_disk_conf->md_flushes) |
1234 | clear_bit(MD_NO_FUA, &mdev->flags); | |
1235 | else | |
1236 | set_bit(MD_NO_FUA, &mdev->flags); | |
1237 | ||
27eb13e9 PR |
1238 | drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush); |
1239 | ||
daeda1cc | 1240 | drbd_md_sync(mdev); |
f399002e LE |
1241 | |
1242 | if (mdev->state.conn >= C_CONNECTED) | |
1243 | drbd_send_sync_param(mdev); | |
1244 | ||
daeda1cc PR |
1245 | synchronize_rcu(); |
1246 | kfree(old_disk_conf); | |
813472ce | 1247 | kfree(old_plan); |
cdfda633 | 1248 | mod_timer(&mdev->request_timer, jiffies + HZ); |
daeda1cc PR |
1249 | goto success; |
1250 | ||
1251 | fail_unlock: | |
1252 | mutex_unlock(&mdev->tconn->conf_update); | |
f399002e | 1253 | fail: |
5ecc72c3 | 1254 | kfree(new_disk_conf); |
813472ce | 1255 | kfree(new_plan); |
daeda1cc PR |
1256 | success: |
1257 | put_ldev(mdev); | |
f399002e LE |
1258 | out: |
1259 | drbd_adm_finish(info, retcode); | |
1260 | return 0; | |
1261 | } | |
1262 | ||
3b98c0c2 | 1263 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1264 | { |
3b98c0c2 LE |
1265 | struct drbd_conf *mdev; |
1266 | int err; | |
116676ca | 1267 | enum drbd_ret_code retcode; |
b411b363 PR |
1268 | enum determine_dev_size dd; |
1269 | sector_t max_possible_sectors; | |
1270 | sector_t min_md_device_sectors; | |
1271 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1272 | struct disk_conf *new_disk_conf = NULL; |
e525fd89 | 1273 | struct block_device *bdev; |
b411b363 | 1274 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1275 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1276 | union drbd_state ns, os; |
f2024e7c | 1277 | enum drbd_state_rv rv; |
44ed167d | 1278 | struct net_conf *nc; |
b411b363 | 1279 | |
3b98c0c2 LE |
1280 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1281 | if (!adm_ctx.reply_skb) | |
1282 | return retcode; | |
1283 | if (retcode != NO_ERROR) | |
40cbf085 | 1284 | goto finish; |
b411b363 | 1285 | |
3b98c0c2 | 1286 | mdev = adm_ctx.mdev; |
0e29d163 | 1287 | conn_reconfig_start(mdev->tconn); |
b411b363 PR |
1288 | |
1289 | /* if you want to reconfigure, please tear down first */ | |
1290 | if (mdev->state.disk > D_DISKLESS) { | |
1291 | retcode = ERR_DISK_CONFIGURED; | |
1292 | goto fail; | |
1293 | } | |
82f59cc6 LE |
1294 | /* It may just now have detached because of IO error. Make sure |
1295 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1296 | * e.g. if someone calls attach from the on-io-error handler, | |
1297 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
1298 | wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt)); | |
b411b363 | 1299 | |
383606e0 | 1300 | /* make sure there is no leftover from previous force-detach attempts */ |
0c849666 | 1301 | clear_bit(FORCE_DETACH, &mdev->flags); |
edc9f5eb LE |
1302 | clear_bit(WAS_IO_ERROR, &mdev->flags); |
1303 | clear_bit(WAS_READ_ERROR, &mdev->flags); | |
383606e0 | 1304 | |
0029d624 LE |
1305 | /* and no leftover from previously aborted resync or verify, either */ |
1306 | mdev->rs_total = 0; | |
1307 | mdev->rs_failed = 0; | |
1308 | atomic_set(&mdev->rs_pending_cnt, 0); | |
1309 | ||
3b98c0c2 | 1310 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1311 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1312 | if (!nbc) { | |
1313 | retcode = ERR_NOMEM; | |
1314 | goto fail; | |
1315 | } | |
9f2247bb PR |
1316 | spin_lock_init(&nbc->md.uuid_lock); |
1317 | ||
daeda1cc PR |
1318 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1319 | if (!new_disk_conf) { | |
1320 | retcode = ERR_NOMEM; | |
b411b363 PR |
1321 | goto fail; |
1322 | } | |
daeda1cc | 1323 | nbc->disk_conf = new_disk_conf; |
b411b363 | 1324 | |
daeda1cc PR |
1325 | set_disk_conf_defaults(new_disk_conf); |
1326 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1327 | if (err) { |
b411b363 | 1328 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 1329 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
1330 | goto fail; |
1331 | } | |
1332 | ||
d589a21e PR |
1333 | enforce_disk_conf_limits(new_disk_conf); |
1334 | ||
9958c857 PR |
1335 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1336 | if (!new_plan) { | |
1337 | retcode = ERR_NOMEM; | |
1338 | goto fail; | |
1339 | } | |
1340 | ||
daeda1cc | 1341 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1342 | retcode = ERR_MD_IDX_INVALID; |
1343 | goto fail; | |
1344 | } | |
1345 | ||
44ed167d PR |
1346 | rcu_read_lock(); |
1347 | nc = rcu_dereference(mdev->tconn->net_conf); | |
1348 | if (nc) { | |
daeda1cc | 1349 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1350 | rcu_read_unlock(); |
47ff2d0a PR |
1351 | retcode = ERR_STONITH_AND_PROT_A; |
1352 | goto fail; | |
1353 | } | |
1354 | } | |
44ed167d | 1355 | rcu_read_unlock(); |
47ff2d0a | 1356 | |
daeda1cc | 1357 | bdev = blkdev_get_by_path(new_disk_conf->backing_dev, |
d4d77629 | 1358 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev); |
e525fd89 | 1359 | if (IS_ERR(bdev)) { |
daeda1cc | 1360 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev, |
e525fd89 | 1361 | PTR_ERR(bdev)); |
b411b363 PR |
1362 | retcode = ERR_OPEN_DISK; |
1363 | goto fail; | |
1364 | } | |
e525fd89 TH |
1365 | nbc->backing_bdev = bdev; |
1366 | ||
1367 | /* | |
1368 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1369 | * drbd sharing one meta device. TODO in that case, paranoia | |
1370 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1371 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1372 | * should check it for you already; but if you don't, or | |
1373 | * someone fooled it, we need to double check here) | |
1374 | */ | |
daeda1cc | 1375 | bdev = blkdev_get_by_path(new_disk_conf->meta_dev, |
d4d77629 | 1376 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, |
daeda1cc | 1377 | (new_disk_conf->meta_dev_idx < 0) ? |
d4d77629 | 1378 | (void *)mdev : (void *)drbd_m_holder); |
e525fd89 | 1379 | if (IS_ERR(bdev)) { |
daeda1cc | 1380 | dev_err(DEV, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev, |
e525fd89 | 1381 | PTR_ERR(bdev)); |
b411b363 PR |
1382 | retcode = ERR_OPEN_MD_DISK; |
1383 | goto fail; | |
1384 | } | |
e525fd89 | 1385 | nbc->md_bdev = bdev; |
b411b363 | 1386 | |
e525fd89 | 1387 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1388 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1389 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1390 | retcode = ERR_MD_IDX_INVALID; |
b411b363 PR |
1391 | goto fail; |
1392 | } | |
1393 | ||
1394 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1395 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1396 | offsetof(struct bm_extent, lce)); |
1397 | if (!resync_lru) { | |
1398 | retcode = ERR_NOMEM; | |
e525fd89 | 1399 | goto fail; |
b411b363 PR |
1400 | } |
1401 | ||
1402 | /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */ | |
1403 | drbd_md_set_sector_offsets(mdev, nbc); | |
1404 | ||
daeda1cc | 1405 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
b411b363 PR |
1406 | dev_err(DEV, "max capacity %llu smaller than disk size %llu\n", |
1407 | (unsigned long long) drbd_get_max_capacity(nbc), | |
daeda1cc | 1408 | (unsigned long long) new_disk_conf->disk_size); |
7948bcdc | 1409 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1410 | goto fail; |
b411b363 PR |
1411 | } |
1412 | ||
daeda1cc | 1413 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1414 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1415 | /* at least one MB, otherwise it does not make sense */ | |
1416 | min_md_device_sectors = (2<<10); | |
1417 | } else { | |
1418 | max_possible_sectors = DRBD_MAX_SECTORS; | |
daeda1cc | 1419 | min_md_device_sectors = MD_RESERVED_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1420 | } |
1421 | ||
b411b363 | 1422 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
7948bcdc | 1423 | retcode = ERR_MD_DISK_TOO_SMALL; |
b411b363 PR |
1424 | dev_warn(DEV, "refusing attach: md-device too small, " |
1425 | "at least %llu sectors needed for this meta-disk type\n", | |
1426 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1427 | goto fail; |
b411b363 PR |
1428 | } |
1429 | ||
1430 | /* Make sure the new disk is big enough | |
1431 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1432 | if (drbd_get_max_capacity(nbc) < | |
1433 | drbd_get_capacity(mdev->this_bdev)) { | |
7948bcdc | 1434 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1435 | goto fail; |
b411b363 PR |
1436 | } |
1437 | ||
1438 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1439 | ||
1352994b LE |
1440 | if (nbc->known_size > max_possible_sectors) { |
1441 | dev_warn(DEV, "==> truncating very big lower level device " | |
1442 | "to currently maximum possible %llu sectors <==\n", | |
1443 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1444 | if (new_disk_conf->meta_dev_idx >= 0) |
1352994b LE |
1445 | dev_warn(DEV, "==>> using internal or flexible " |
1446 | "meta data may help <<==\n"); | |
1447 | } | |
1448 | ||
b411b363 PR |
1449 | drbd_suspend_io(mdev); |
1450 | /* also wait for the last barrier ack. */ | |
b6dd1a89 LE |
1451 | /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171 |
1452 | * We need a way to either ignore barrier acks for barriers sent before a device | |
1453 | * was attached, or a way to wait for all pending barrier acks to come in. | |
1454 | * As barriers are counted per resource, | |
1455 | * we'd need to suspend io on all devices of a resource. | |
1456 | */ | |
2aebfabb | 1457 | wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || drbd_suspended(mdev)); |
b411b363 PR |
1458 | /* and for any other previously queued work */ |
1459 | drbd_flush_workqueue(mdev); | |
1460 | ||
f2024e7c AG |
1461 | rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE); |
1462 | retcode = rv; /* FIXME: Type mismatch. */ | |
b411b363 | 1463 | drbd_resume_io(mdev); |
f2024e7c | 1464 | if (rv < SS_SUCCESS) |
e525fd89 | 1465 | goto fail; |
b411b363 PR |
1466 | |
1467 | if (!get_ldev_if_state(mdev, D_ATTACHING)) | |
1468 | goto force_diskless; | |
1469 | ||
1470 | drbd_md_set_sector_offsets(mdev, nbc); | |
1471 | ||
1472 | if (!mdev->bitmap) { | |
1473 | if (drbd_bm_init(mdev)) { | |
1474 | retcode = ERR_NOMEM; | |
1475 | goto force_diskless_dec; | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | retcode = drbd_md_read(mdev, nbc); | |
1480 | if (retcode != NO_ERROR) | |
1481 | goto force_diskless_dec; | |
1482 | ||
1483 | if (mdev->state.conn < C_CONNECTED && | |
1484 | mdev->state.role == R_PRIMARY && | |
1485 | (mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
1486 | dev_err(DEV, "Can only attach to data with current UUID=%016llX\n", | |
1487 | (unsigned long long)mdev->ed_uuid); | |
1488 | retcode = ERR_DATA_NOT_CURRENT; | |
1489 | goto force_diskless_dec; | |
1490 | } | |
1491 | ||
1492 | /* Since we are diskless, fix the activity log first... */ | |
daeda1cc | 1493 | if (drbd_check_al_size(mdev, new_disk_conf)) { |
b411b363 PR |
1494 | retcode = ERR_NOMEM; |
1495 | goto force_diskless_dec; | |
1496 | } | |
1497 | ||
1498 | /* Prevent shrinking of consistent devices ! */ | |
1499 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
daeda1cc | 1500 | drbd_new_dev_size(mdev, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) { |
b411b363 | 1501 | dev_warn(DEV, "refusing to truncate a consistent device\n"); |
7948bcdc | 1502 | retcode = ERR_DISK_TOO_SMALL; |
b411b363 PR |
1503 | goto force_diskless_dec; |
1504 | } | |
1505 | ||
b411b363 PR |
1506 | /* Reset the "barriers don't work" bits here, then force meta data to |
1507 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 1508 | if (new_disk_conf->md_flushes) |
a8a4e51e | 1509 | clear_bit(MD_NO_FUA, &mdev->flags); |
b411b363 | 1510 | else |
e544046a | 1511 | set_bit(MD_NO_FUA, &mdev->flags); |
b411b363 PR |
1512 | |
1513 | /* Point of no return reached. | |
1514 | * Devices and memory are no longer released by error cleanup below. | |
1515 | * now mdev takes over responsibility, and the state engine should | |
1516 | * clean it up somewhere. */ | |
1517 | D_ASSERT(mdev->ldev == NULL); | |
1518 | mdev->ldev = nbc; | |
1519 | mdev->resync = resync_lru; | |
9958c857 | 1520 | mdev->rs_plan_s = new_plan; |
b411b363 PR |
1521 | nbc = NULL; |
1522 | resync_lru = NULL; | |
daeda1cc | 1523 | new_disk_conf = NULL; |
9958c857 | 1524 | new_plan = NULL; |
b411b363 | 1525 | |
4b0007c0 | 1526 | drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush); |
b411b363 PR |
1527 | |
1528 | if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY)) | |
1529 | set_bit(CRASHED_PRIMARY, &mdev->flags); | |
1530 | else | |
1531 | clear_bit(CRASHED_PRIMARY, &mdev->flags); | |
1532 | ||
894c6a94 | 1533 | if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && |
d5d7ebd4 | 1534 | !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) |
b411b363 | 1535 | set_bit(CRASHED_PRIMARY, &mdev->flags); |
b411b363 PR |
1536 | |
1537 | mdev->send_cnt = 0; | |
1538 | mdev->recv_cnt = 0; | |
1539 | mdev->read_cnt = 0; | |
1540 | mdev->writ_cnt = 0; | |
1541 | ||
99432fcc | 1542 | drbd_reconsider_max_bio_size(mdev); |
b411b363 PR |
1543 | |
1544 | /* If I am currently not R_PRIMARY, | |
1545 | * but meta data primary indicator is set, | |
1546 | * I just now recover from a hard crash, | |
1547 | * and have been R_PRIMARY before that crash. | |
1548 | * | |
1549 | * Now, if I had no connection before that crash | |
1550 | * (have been degraded R_PRIMARY), chances are that | |
1551 | * I won't find my peer now either. | |
1552 | * | |
1553 | * In that case, and _only_ in that case, | |
1554 | * we use the degr-wfc-timeout instead of the default, | |
1555 | * so we can automatically recover from a crash of a | |
1556 | * degraded but active "cluster" after a certain timeout. | |
1557 | */ | |
1558 | clear_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1559 | if (mdev->state.role != R_PRIMARY && | |
1560 | drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) && | |
1561 | !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) | |
1562 | set_bit(USE_DEGR_WFC_T, &mdev->flags); | |
1563 | ||
24c4830c | 1564 | dd = drbd_determine_dev_size(mdev, 0); |
b411b363 PR |
1565 | if (dd == dev_size_error) { |
1566 | retcode = ERR_NOMEM_BITMAP; | |
1567 | goto force_diskless_dec; | |
1568 | } else if (dd == grew) | |
1569 | set_bit(RESYNC_AFTER_NEG, &mdev->flags); | |
1570 | ||
9a51ab1c PR |
1571 | if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC) || |
1572 | (test_bit(CRASHED_PRIMARY, &mdev->flags) && | |
1573 | drbd_md_test_flag(mdev->ldev, MDF_AL_DISABLED))) { | |
b411b363 PR |
1574 | dev_info(DEV, "Assuming that all blocks are out of sync " |
1575 | "(aka FullSync)\n"); | |
20ceb2b2 LE |
1576 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, |
1577 | "set_n_write from attaching", BM_LOCKED_MASK)) { | |
b411b363 PR |
1578 | retcode = ERR_IO_MD_DISK; |
1579 | goto force_diskless_dec; | |
1580 | } | |
1581 | } else { | |
20ceb2b2 | 1582 | if (drbd_bitmap_io(mdev, &drbd_bm_read, |
22ab6a30 | 1583 | "read from attaching", BM_LOCKED_MASK)) { |
19f843aa LE |
1584 | retcode = ERR_IO_MD_DISK; |
1585 | goto force_diskless_dec; | |
1586 | } | |
b411b363 PR |
1587 | } |
1588 | ||
0778286a PR |
1589 | if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) |
1590 | drbd_suspend_al(mdev); /* IO is still suspended here... */ | |
1591 | ||
87eeee41 | 1592 | spin_lock_irq(&mdev->tconn->req_lock); |
78bae59b PR |
1593 | os = drbd_read_state(mdev); |
1594 | ns = os; | |
b411b363 PR |
1595 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1596 | otherwise investigate MDF_WasUpToDate... | |
1597 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1598 | otherwise into D_CONSISTENT state. | |
1599 | */ | |
1600 | if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) { | |
1601 | if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE)) | |
1602 | ns.disk = D_CONSISTENT; | |
1603 | else | |
1604 | ns.disk = D_OUTDATED; | |
1605 | } else { | |
1606 | ns.disk = D_INCONSISTENT; | |
1607 | } | |
1608 | ||
1609 | if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED)) | |
1610 | ns.pdsk = D_OUTDATED; | |
1611 | ||
daeda1cc PR |
1612 | rcu_read_lock(); |
1613 | if (ns.disk == D_CONSISTENT && | |
1614 | (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE)) | |
b411b363 PR |
1615 | ns.disk = D_UP_TO_DATE; |
1616 | ||
1617 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1618 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1619 | this point, because drbd_request_state() modifies these | |
1620 | flags. */ | |
1621 | ||
9a51ab1c | 1622 | if (rcu_dereference(mdev->ldev->disk_conf)->al_updates) |
4035e4c2 | 1623 | mdev->ldev->md.flags &= ~MDF_AL_DISABLED; |
9a51ab1c PR |
1624 | else |
1625 | mdev->ldev->md.flags |= MDF_AL_DISABLED; | |
1626 | ||
1627 | rcu_read_unlock(); | |
1628 | ||
b411b363 PR |
1629 | /* In case we are C_CONNECTED postpone any decision on the new disk |
1630 | state after the negotiation phase. */ | |
1631 | if (mdev->state.conn == C_CONNECTED) { | |
1632 | mdev->new_state_tmp.i = ns.i; | |
1633 | ns.i = os.i; | |
1634 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1635 | |
1636 | /* We expect to receive up-to-date UUIDs soon. | |
1637 | To avoid a race in receive_state, free p_uuid while | |
1638 | holding req_lock. I.e. atomic with the state change */ | |
1639 | kfree(mdev->p_uuid); | |
1640 | mdev->p_uuid = NULL; | |
b411b363 PR |
1641 | } |
1642 | ||
1643 | rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); | |
87eeee41 | 1644 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
1645 | |
1646 | if (rv < SS_SUCCESS) | |
1647 | goto force_diskless_dec; | |
1648 | ||
cdfda633 PR |
1649 | mod_timer(&mdev->request_timer, jiffies + HZ); |
1650 | ||
b411b363 PR |
1651 | if (mdev->state.role == R_PRIMARY) |
1652 | mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
1653 | else | |
1654 | mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
1655 | ||
1656 | drbd_md_mark_dirty(mdev); | |
1657 | drbd_md_sync(mdev); | |
1658 | ||
1659 | kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); | |
1660 | put_ldev(mdev); | |
0e29d163 | 1661 | conn_reconfig_done(mdev->tconn); |
3b98c0c2 | 1662 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1663 | return 0; |
1664 | ||
1665 | force_diskless_dec: | |
1666 | put_ldev(mdev); | |
1667 | force_diskless: | |
9510b241 | 1668 | drbd_force_state(mdev, NS(disk, D_DISKLESS)); |
b411b363 | 1669 | drbd_md_sync(mdev); |
b411b363 | 1670 | fail: |
40cbf085 | 1671 | conn_reconfig_done(mdev->tconn); |
b411b363 | 1672 | if (nbc) { |
e525fd89 TH |
1673 | if (nbc->backing_bdev) |
1674 | blkdev_put(nbc->backing_bdev, | |
1675 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1676 | if (nbc->md_bdev) | |
1677 | blkdev_put(nbc->md_bdev, | |
1678 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1679 | kfree(nbc); |
1680 | } | |
daeda1cc | 1681 | kfree(new_disk_conf); |
b411b363 | 1682 | lc_destroy(resync_lru); |
9958c857 | 1683 | kfree(new_plan); |
b411b363 | 1684 | |
40cbf085 | 1685 | finish: |
3b98c0c2 | 1686 | drbd_adm_finish(info, retcode); |
b411b363 PR |
1687 | return 0; |
1688 | } | |
1689 | ||
cdfda633 | 1690 | static int adm_detach(struct drbd_conf *mdev, int force) |
b411b363 | 1691 | { |
19f83c76 | 1692 | enum drbd_state_rv retcode; |
9a0d9d03 | 1693 | int ret; |
02ee8f95 | 1694 | |
cdfda633 | 1695 | if (force) { |
0c849666 | 1696 | set_bit(FORCE_DETACH, &mdev->flags); |
02ee8f95 | 1697 | drbd_force_state(mdev, NS(disk, D_FAILED)); |
cdfda633 | 1698 | retcode = SS_SUCCESS; |
02ee8f95 PR |
1699 | goto out; |
1700 | } | |
1701 | ||
82f59cc6 | 1702 | drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */ |
a2e91381 | 1703 | drbd_md_get_buffer(mdev); /* make sure there is no in-flight meta-data IO */ |
9a0d9d03 | 1704 | retcode = drbd_request_state(mdev, NS(disk, D_FAILED)); |
a2e91381 | 1705 | drbd_md_put_buffer(mdev); |
9a0d9d03 LE |
1706 | /* D_FAILED will transition to DISKLESS. */ |
1707 | ret = wait_event_interruptible(mdev->misc_wait, | |
1708 | mdev->state.disk != D_FAILED); | |
82f59cc6 | 1709 | drbd_resume_io(mdev); |
9b2f61ae | 1710 | if ((int)retcode == (int)SS_IS_DISKLESS) |
9a0d9d03 LE |
1711 | retcode = SS_NOTHING_TO_DO; |
1712 | if (ret) | |
1713 | retcode = ERR_INTR; | |
02ee8f95 | 1714 | out: |
85f75dd7 | 1715 | return retcode; |
b411b363 PR |
1716 | } |
1717 | ||
82f59cc6 LE |
1718 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1719 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1720 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1721 | * internal references as well. | |
1722 | * Only then we have finally detached. */ | |
3b98c0c2 | 1723 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1724 | { |
116676ca | 1725 | enum drbd_ret_code retcode; |
cdfda633 PR |
1726 | struct detach_parms parms = { }; |
1727 | int err; | |
b411b363 | 1728 | |
3b98c0c2 LE |
1729 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
1730 | if (!adm_ctx.reply_skb) | |
1731 | return retcode; | |
1732 | if (retcode != NO_ERROR) | |
1733 | goto out; | |
b411b363 | 1734 | |
cdfda633 PR |
1735 | if (info->attrs[DRBD_NLA_DETACH_PARMS]) { |
1736 | err = detach_parms_from_attrs(&parms, info); | |
1737 | if (err) { | |
1738 | retcode = ERR_MANDATORY_TAG; | |
1739 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1740 | goto out; | |
1741 | } | |
b411b363 PR |
1742 | } |
1743 | ||
cdfda633 | 1744 | retcode = adm_detach(adm_ctx.mdev, parms.force_detach); |
3b98c0c2 LE |
1745 | out: |
1746 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
1747 | return 0; |
1748 | } | |
b411b363 | 1749 | |
f399002e LE |
1750 | static bool conn_resync_running(struct drbd_tconn *tconn) |
1751 | { | |
1752 | struct drbd_conf *mdev; | |
695d08fa | 1753 | bool rv = false; |
f399002e LE |
1754 | int vnr; |
1755 | ||
695d08fa | 1756 | rcu_read_lock(); |
f399002e LE |
1757 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1758 | if (mdev->state.conn == C_SYNC_SOURCE || | |
1759 | mdev->state.conn == C_SYNC_TARGET || | |
1760 | mdev->state.conn == C_PAUSED_SYNC_S || | |
695d08fa PR |
1761 | mdev->state.conn == C_PAUSED_SYNC_T) { |
1762 | rv = true; | |
1763 | break; | |
1764 | } | |
b411b363 | 1765 | } |
695d08fa | 1766 | rcu_read_unlock(); |
b411b363 | 1767 | |
695d08fa | 1768 | return rv; |
f399002e | 1769 | } |
47ff2d0a | 1770 | |
f399002e LE |
1771 | static bool conn_ov_running(struct drbd_tconn *tconn) |
1772 | { | |
1773 | struct drbd_conf *mdev; | |
695d08fa | 1774 | bool rv = false; |
f399002e LE |
1775 | int vnr; |
1776 | ||
695d08fa | 1777 | rcu_read_lock(); |
f399002e LE |
1778 | idr_for_each_entry(&tconn->volumes, mdev, vnr) { |
1779 | if (mdev->state.conn == C_VERIFY_S || | |
695d08fa PR |
1780 | mdev->state.conn == C_VERIFY_T) { |
1781 | rv = true; | |
1782 | break; | |
47ff2d0a PR |
1783 | } |
1784 | } | |
695d08fa | 1785 | rcu_read_unlock(); |
b411b363 | 1786 | |
695d08fa | 1787 | return rv; |
f399002e | 1788 | } |
422028b1 | 1789 | |
cd64397c | 1790 | static enum drbd_ret_code |
44ed167d | 1791 | _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf) |
cd64397c PR |
1792 | { |
1793 | struct drbd_conf *mdev; | |
1794 | int i; | |
b411b363 | 1795 | |
dcb20d1a PR |
1796 | if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) { |
1797 | if (new_conf->wire_protocol != old_conf->wire_protocol) | |
1798 | return ERR_NEED_APV_100; | |
b411b363 | 1799 | |
dcb20d1a PR |
1800 | if (new_conf->two_primaries != old_conf->two_primaries) |
1801 | return ERR_NEED_APV_100; | |
1802 | ||
dcb20d1a PR |
1803 | if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg)) |
1804 | return ERR_NEED_APV_100; | |
b411b363 PR |
1805 | } |
1806 | ||
dcb20d1a PR |
1807 | if (!new_conf->two_primaries && |
1808 | conn_highest_role(tconn) == R_PRIMARY && | |
1809 | conn_highest_peer(tconn) == R_PRIMARY) | |
1810 | return ERR_NEED_ALLOW_TWO_PRI; | |
b411b363 | 1811 | |
cd64397c PR |
1812 | if (new_conf->two_primaries && |
1813 | (new_conf->wire_protocol != DRBD_PROT_C)) | |
1814 | return ERR_NOT_PROTO_C; | |
1815 | ||
cd64397c PR |
1816 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
1817 | if (get_ldev(mdev)) { | |
daeda1cc | 1818 | enum drbd_fencing_p fp = rcu_dereference(mdev->ldev->disk_conf)->fencing; |
cd64397c | 1819 | put_ldev(mdev); |
44ed167d | 1820 | if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 1821 | return ERR_STONITH_AND_PROT_A; |
b411b363 | 1822 | } |
6139f60d | 1823 | if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data) |
eb12010e | 1824 | return ERR_DISCARD_IMPOSSIBLE; |
b411b363 PR |
1825 | } |
1826 | ||
cd64397c PR |
1827 | if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) |
1828 | return ERR_CONG_NOT_PROTO_A; | |
b411b363 | 1829 | |
cd64397c PR |
1830 | return NO_ERROR; |
1831 | } | |
b411b363 | 1832 | |
44ed167d PR |
1833 | static enum drbd_ret_code |
1834 | check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf) | |
1835 | { | |
1836 | static enum drbd_ret_code rv; | |
1837 | struct drbd_conf *mdev; | |
1838 | int i; | |
b411b363 | 1839 | |
44ed167d PR |
1840 | rcu_read_lock(); |
1841 | rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf); | |
1842 | rcu_read_unlock(); | |
b411b363 | 1843 | |
44ed167d PR |
1844 | /* tconn->volumes protected by genl_lock() here */ |
1845 | idr_for_each_entry(&tconn->volumes, mdev, i) { | |
1846 | if (!mdev->bitmap) { | |
1847 | if(drbd_bm_init(mdev)) | |
1848 | return ERR_NOMEM; | |
b411b363 PR |
1849 | } |
1850 | } | |
1851 | ||
44ed167d PR |
1852 | return rv; |
1853 | } | |
b411b363 | 1854 | |
0fd0ea06 PR |
1855 | struct crypto { |
1856 | struct crypto_hash *verify_tfm; | |
1857 | struct crypto_hash *csums_tfm; | |
1858 | struct crypto_hash *cram_hmac_tfm; | |
8d412fc6 | 1859 | struct crypto_hash *integrity_tfm; |
0fd0ea06 | 1860 | }; |
b411b363 | 1861 | |
0fd0ea06 | 1862 | static int |
4b6ad6d4 | 1863 | alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
1864 | { |
1865 | if (!tfm_name[0]) | |
1866 | return NO_ERROR; | |
b411b363 | 1867 | |
0fd0ea06 PR |
1868 | *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC); |
1869 | if (IS_ERR(*tfm)) { | |
1870 | *tfm = NULL; | |
1871 | return err_alg; | |
b411b363 | 1872 | } |
b411b363 | 1873 | |
0fd0ea06 PR |
1874 | return NO_ERROR; |
1875 | } | |
b411b363 | 1876 | |
0fd0ea06 PR |
1877 | static enum drbd_ret_code |
1878 | alloc_crypto(struct crypto *crypto, struct net_conf *new_conf) | |
1879 | { | |
1880 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
1881 | enum drbd_ret_code rv; | |
0fd0ea06 | 1882 | |
4b6ad6d4 AG |
1883 | rv = alloc_hash(&crypto->csums_tfm, new_conf->csums_alg, |
1884 | ERR_CSUMS_ALG); | |
0fd0ea06 PR |
1885 | if (rv != NO_ERROR) |
1886 | return rv; | |
4b6ad6d4 AG |
1887 | rv = alloc_hash(&crypto->verify_tfm, new_conf->verify_alg, |
1888 | ERR_VERIFY_ALG); | |
0fd0ea06 PR |
1889 | if (rv != NO_ERROR) |
1890 | return rv; | |
4b6ad6d4 AG |
1891 | rv = alloc_hash(&crypto->integrity_tfm, new_conf->integrity_alg, |
1892 | ERR_INTEGRITY_ALG); | |
0fd0ea06 PR |
1893 | if (rv != NO_ERROR) |
1894 | return rv; | |
0fd0ea06 PR |
1895 | if (new_conf->cram_hmac_alg[0] != 0) { |
1896 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", | |
1897 | new_conf->cram_hmac_alg); | |
b411b363 | 1898 | |
4b6ad6d4 AG |
1899 | rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name, |
1900 | ERR_AUTH_ALG); | |
b411b363 PR |
1901 | } |
1902 | ||
0fd0ea06 PR |
1903 | return rv; |
1904 | } | |
b411b363 | 1905 | |
0fd0ea06 PR |
1906 | static void free_crypto(struct crypto *crypto) |
1907 | { | |
0fd0ea06 | 1908 | crypto_free_hash(crypto->cram_hmac_tfm); |
8d412fc6 | 1909 | crypto_free_hash(crypto->integrity_tfm); |
0fd0ea06 PR |
1910 | crypto_free_hash(crypto->csums_tfm); |
1911 | crypto_free_hash(crypto->verify_tfm); | |
1912 | } | |
b411b363 | 1913 | |
f399002e LE |
1914 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
1915 | { | |
1916 | enum drbd_ret_code retcode; | |
1917 | struct drbd_tconn *tconn; | |
44ed167d | 1918 | struct net_conf *old_conf, *new_conf = NULL; |
f399002e LE |
1919 | int err; |
1920 | int ovr; /* online verify running */ | |
1921 | int rsr; /* re-sync running */ | |
0fd0ea06 | 1922 | struct crypto crypto = { }; |
b411b363 | 1923 | |
089c075d | 1924 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION); |
f399002e LE |
1925 | if (!adm_ctx.reply_skb) |
1926 | return retcode; | |
1927 | if (retcode != NO_ERROR) | |
1928 | goto out; | |
b411b363 | 1929 | |
f399002e | 1930 | tconn = adm_ctx.tconn; |
b411b363 | 1931 | |
f399002e LE |
1932 | new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
1933 | if (!new_conf) { | |
1934 | retcode = ERR_NOMEM; | |
1935 | goto out; | |
1936 | } | |
b411b363 | 1937 | |
44ed167d | 1938 | conn_reconfig_start(tconn); |
b411b363 | 1939 | |
88104ca4 | 1940 | mutex_lock(&tconn->data.mutex); |
a0095508 | 1941 | mutex_lock(&tconn->conf_update); |
91fd4dad | 1942 | old_conf = tconn->net_conf; |
2561b9c1 | 1943 | |
44ed167d | 1944 | if (!old_conf) { |
f399002e LE |
1945 | drbd_msg_put_info("net conf missing, try connect"); |
1946 | retcode = ERR_INVALID_REQUEST; | |
2561b9c1 PR |
1947 | goto fail; |
1948 | } | |
1949 | ||
44ed167d | 1950 | *new_conf = *old_conf; |
5979e361 | 1951 | if (should_set_defaults(info)) |
b966b5dd | 1952 | set_net_conf_defaults(new_conf); |
f399002e | 1953 | |
f399002e | 1954 | err = net_conf_from_attrs_for_change(new_conf, info); |
c75b9b10 | 1955 | if (err && err != -ENOMSG) { |
f399002e LE |
1956 | retcode = ERR_MANDATORY_TAG; |
1957 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
1958 | goto fail; | |
2561b9c1 | 1959 | } |
b411b363 | 1960 | |
cd64397c PR |
1961 | retcode = check_net_options(tconn, new_conf); |
1962 | if (retcode != NO_ERROR) | |
1963 | goto fail; | |
b411b363 | 1964 | |
f399002e LE |
1965 | /* re-sync running */ |
1966 | rsr = conn_resync_running(tconn); | |
0fd0ea06 | 1967 | if (rsr && strcmp(new_conf->csums_alg, old_conf->csums_alg)) { |
f399002e | 1968 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 1969 | goto fail; |
b411b363 PR |
1970 | } |
1971 | ||
f399002e LE |
1972 | /* online verify running */ |
1973 | ovr = conn_ov_running(tconn); | |
0fd0ea06 PR |
1974 | if (ovr && strcmp(new_conf->verify_alg, old_conf->verify_alg)) { |
1975 | retcode = ERR_VERIFY_RUNNING; | |
b411b363 | 1976 | goto fail; |
f399002e | 1977 | } |
b411b363 | 1978 | |
0fd0ea06 PR |
1979 | retcode = alloc_crypto(&crypto, new_conf); |
1980 | if (retcode != NO_ERROR) | |
b411b363 | 1981 | goto fail; |
f399002e | 1982 | |
44ed167d | 1983 | rcu_assign_pointer(tconn->net_conf, new_conf); |
f399002e LE |
1984 | |
1985 | if (!rsr) { | |
1986 | crypto_free_hash(tconn->csums_tfm); | |
0fd0ea06 PR |
1987 | tconn->csums_tfm = crypto.csums_tfm; |
1988 | crypto.csums_tfm = NULL; | |
f399002e LE |
1989 | } |
1990 | if (!ovr) { | |
1991 | crypto_free_hash(tconn->verify_tfm); | |
0fd0ea06 PR |
1992 | tconn->verify_tfm = crypto.verify_tfm; |
1993 | crypto.verify_tfm = NULL; | |
b411b363 PR |
1994 | } |
1995 | ||
8d412fc6 AG |
1996 | crypto_free_hash(tconn->integrity_tfm); |
1997 | tconn->integrity_tfm = crypto.integrity_tfm; | |
d659f2aa | 1998 | if (tconn->cstate >= C_WF_REPORT_PARAMS && tconn->agreed_pro_version >= 100) |
88104ca4 | 1999 | /* Do this without trying to take tconn->data.mutex again. */ |
d659f2aa | 2000 | __drbd_send_protocol(tconn, P_PROTOCOL_UPDATE); |
0fd0ea06 | 2001 | |
0fd0ea06 PR |
2002 | crypto_free_hash(tconn->cram_hmac_tfm); |
2003 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
2004 | ||
a0095508 | 2005 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 2006 | mutex_unlock(&tconn->data.mutex); |
91fd4dad PR |
2007 | synchronize_rcu(); |
2008 | kfree(old_conf); | |
2009 | ||
f399002e LE |
2010 | if (tconn->cstate >= C_WF_REPORT_PARAMS) |
2011 | drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn))); | |
2012 | ||
91fd4dad PR |
2013 | goto done; |
2014 | ||
b411b363 | 2015 | fail: |
a0095508 | 2016 | mutex_unlock(&tconn->conf_update); |
88104ca4 | 2017 | mutex_unlock(&tconn->data.mutex); |
0fd0ea06 | 2018 | free_crypto(&crypto); |
f399002e | 2019 | kfree(new_conf); |
91fd4dad | 2020 | done: |
f399002e LE |
2021 | conn_reconfig_done(tconn); |
2022 | out: | |
2023 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2024 | return 0; |
2025 | } | |
2026 | ||
3b98c0c2 | 2027 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2028 | { |
3b98c0c2 | 2029 | struct drbd_conf *mdev; |
44ed167d | 2030 | struct net_conf *old_conf, *new_conf = NULL; |
0fd0ea06 | 2031 | struct crypto crypto = { }; |
3b98c0c2 | 2032 | struct drbd_tconn *tconn; |
3b98c0c2 LE |
2033 | enum drbd_ret_code retcode; |
2034 | int i; | |
2035 | int err; | |
b411b363 | 2036 | |
44e52cfa | 2037 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
b411b363 | 2038 | |
3b98c0c2 LE |
2039 | if (!adm_ctx.reply_skb) |
2040 | return retcode; | |
2041 | if (retcode != NO_ERROR) | |
2042 | goto out; | |
089c075d AG |
2043 | if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) { |
2044 | drbd_msg_put_info("connection endpoint(s) missing"); | |
2045 | retcode = ERR_INVALID_REQUEST; | |
2046 | goto out; | |
2047 | } | |
b411b363 | 2048 | |
089c075d AG |
2049 | /* No need for _rcu here. All reconfiguration is |
2050 | * strictly serialized on genl_lock(). We are protected against | |
2051 | * concurrent reconfiguration/addition/deletion */ | |
2052 | list_for_each_entry(tconn, &drbd_tconns, all_tconn) { | |
2053 | if (nla_len(adm_ctx.my_addr) == tconn->my_addr_len && | |
2054 | !memcmp(nla_data(adm_ctx.my_addr), &tconn->my_addr, tconn->my_addr_len)) { | |
2055 | retcode = ERR_LOCAL_ADDR; | |
2056 | goto out; | |
2057 | } | |
b411b363 | 2058 | |
089c075d AG |
2059 | if (nla_len(adm_ctx.peer_addr) == tconn->peer_addr_len && |
2060 | !memcmp(nla_data(adm_ctx.peer_addr), &tconn->peer_addr, tconn->peer_addr_len)) { | |
2061 | retcode = ERR_PEER_ADDR; | |
2062 | goto out; | |
2063 | } | |
b411b363 PR |
2064 | } |
2065 | ||
3b98c0c2 | 2066 | tconn = adm_ctx.tconn; |
80883197 | 2067 | conn_reconfig_start(tconn); |
b411b363 | 2068 | |
80883197 | 2069 | if (tconn->cstate > C_STANDALONE) { |
b411b363 | 2070 | retcode = ERR_NET_CONFIGURED; |
b411b363 PR |
2071 | goto fail; |
2072 | } | |
2073 | ||
a209b4ae | 2074 | /* allocation not in the IO path, drbdsetup / netlink process context */ |
5979e361 | 2075 | new_conf = kzalloc(sizeof(*new_conf), GFP_KERNEL); |
b411b363 PR |
2076 | if (!new_conf) { |
2077 | retcode = ERR_NOMEM; | |
b411b363 PR |
2078 | goto fail; |
2079 | } | |
2080 | ||
b966b5dd | 2081 | set_net_conf_defaults(new_conf); |
b411b363 | 2082 | |
f399002e | 2083 | err = net_conf_from_attrs(new_conf, info); |
25e40932 | 2084 | if (err && err != -ENOMSG) { |
b411b363 | 2085 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2086 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2087 | goto fail; |
2088 | } | |
2089 | ||
cd64397c PR |
2090 | retcode = check_net_options(tconn, new_conf); |
2091 | if (retcode != NO_ERROR) | |
422028b1 | 2092 | goto fail; |
b411b363 | 2093 | |
0fd0ea06 PR |
2094 | retcode = alloc_crypto(&crypto, new_conf); |
2095 | if (retcode != NO_ERROR) | |
2096 | goto fail; | |
b411b363 | 2097 | |
b411b363 | 2098 | ((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
7b4e4d31 | 2099 | |
80883197 | 2100 | conn_flush_workqueue(tconn); |
b411b363 | 2101 | |
a0095508 | 2102 | mutex_lock(&tconn->conf_update); |
91fd4dad PR |
2103 | old_conf = tconn->net_conf; |
2104 | if (old_conf) { | |
b411b363 | 2105 | retcode = ERR_NET_CONFIGURED; |
a0095508 | 2106 | mutex_unlock(&tconn->conf_update); |
b411b363 PR |
2107 | goto fail; |
2108 | } | |
44ed167d | 2109 | rcu_assign_pointer(tconn->net_conf, new_conf); |
b411b363 | 2110 | |
91fd4dad | 2111 | conn_free_crypto(tconn); |
0fd0ea06 | 2112 | tconn->cram_hmac_tfm = crypto.cram_hmac_tfm; |
8d412fc6 | 2113 | tconn->integrity_tfm = crypto.integrity_tfm; |
0fd0ea06 PR |
2114 | tconn->csums_tfm = crypto.csums_tfm; |
2115 | tconn->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2116 | |
089c075d AG |
2117 | tconn->my_addr_len = nla_len(adm_ctx.my_addr); |
2118 | memcpy(&tconn->my_addr, nla_data(adm_ctx.my_addr), tconn->my_addr_len); | |
2119 | tconn->peer_addr_len = nla_len(adm_ctx.peer_addr); | |
2120 | memcpy(&tconn->peer_addr, nla_data(adm_ctx.peer_addr), tconn->peer_addr_len); | |
b411b363 | 2121 | |
a0095508 | 2122 | mutex_unlock(&tconn->conf_update); |
b411b363 | 2123 | |
695d08fa | 2124 | rcu_read_lock(); |
80883197 PR |
2125 | idr_for_each_entry(&tconn->volumes, mdev, i) { |
2126 | mdev->send_cnt = 0; | |
2127 | mdev->recv_cnt = 0; | |
b411b363 | 2128 | } |
695d08fa | 2129 | rcu_read_unlock(); |
b411b363 | 2130 | |
5ee743e9 | 2131 | retcode = conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE); |
b411b363 | 2132 | |
80883197 | 2133 | conn_reconfig_done(tconn); |
3b98c0c2 | 2134 | drbd_adm_finish(info, retcode); |
b411b363 | 2135 | return 0; |
b411b363 | 2136 | |
b411b363 | 2137 | fail: |
0fd0ea06 | 2138 | free_crypto(&crypto); |
b411b363 | 2139 | kfree(new_conf); |
b411b363 | 2140 | |
80883197 | 2141 | conn_reconfig_done(tconn); |
3b98c0c2 LE |
2142 | out: |
2143 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2144 | return 0; |
2145 | } | |
2146 | ||
85f75dd7 LE |
2147 | static enum drbd_state_rv conn_try_disconnect(struct drbd_tconn *tconn, bool force) |
2148 | { | |
2149 | enum drbd_state_rv rv; | |
85f75dd7 | 2150 | |
f3dfa40a LE |
2151 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2152 | force ? CS_HARD : 0); | |
85f75dd7 LE |
2153 | |
2154 | switch (rv) { | |
2155 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2156 | break; |
85f75dd7 LE |
2157 | case SS_ALREADY_STANDALONE: |
2158 | return SS_SUCCESS; | |
2159 | case SS_PRIMARY_NOP: | |
2160 | /* Our state checking code wants to see the peer outdated. */ | |
2161 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
f3dfa40a | 2162 | pdsk, D_OUTDATED), CS_VERBOSE); |
85f75dd7 LE |
2163 | break; |
2164 | case SS_CW_FAILED_BY_PEER: | |
2165 | /* The peer probably wants to see us outdated. */ | |
2166 | rv = conn_request_state(tconn, NS2(conn, C_DISCONNECTING, | |
2167 | disk, D_OUTDATED), 0); | |
2168 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
f3dfa40a LE |
2169 | rv = conn_request_state(tconn, NS(conn, C_DISCONNECTING), |
2170 | CS_HARD); | |
b411b363 | 2171 | } |
85f75dd7 LE |
2172 | break; |
2173 | default:; | |
2174 | /* no special handling necessary */ | |
2175 | } | |
2176 | ||
f3dfa40a LE |
2177 | if (rv >= SS_SUCCESS) { |
2178 | enum drbd_state_rv rv2; | |
2179 | /* No one else can reconfigure the network while I am here. | |
2180 | * The state handling only uses drbd_thread_stop_nowait(), | |
2181 | * we want to really wait here until the receiver is no more. | |
2182 | */ | |
2183 | drbd_thread_stop(&adm_ctx.tconn->receiver); | |
2184 | ||
2185 | /* Race breaker. This additional state change request may be | |
2186 | * necessary, if this was a forced disconnect during a receiver | |
2187 | * restart. We may have "killed" the receiver thread just | |
2188 | * after drbdd_init() returned. Typically, we should be | |
2189 | * C_STANDALONE already, now, and this becomes a no-op. | |
2190 | */ | |
2191 | rv2 = conn_request_state(tconn, NS(conn, C_STANDALONE), | |
2192 | CS_VERBOSE | CS_HARD); | |
2193 | if (rv2 < SS_SUCCESS) | |
2194 | conn_err(tconn, | |
2195 | "unexpected rv2=%d in conn_try_disconnect()\n", | |
2196 | rv2); | |
b411b363 | 2197 | } |
85f75dd7 LE |
2198 | return rv; |
2199 | } | |
b411b363 | 2200 | |
3b98c0c2 | 2201 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2202 | { |
3b98c0c2 LE |
2203 | struct disconnect_parms parms; |
2204 | struct drbd_tconn *tconn; | |
85f75dd7 | 2205 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2206 | enum drbd_ret_code retcode; |
2207 | int err; | |
2561b9c1 | 2208 | |
089c075d | 2209 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONNECTION); |
3b98c0c2 LE |
2210 | if (!adm_ctx.reply_skb) |
2211 | return retcode; | |
2212 | if (retcode != NO_ERROR) | |
2561b9c1 | 2213 | goto fail; |
b411b363 | 2214 | |
3b98c0c2 LE |
2215 | tconn = adm_ctx.tconn; |
2216 | memset(&parms, 0, sizeof(parms)); | |
2217 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2218 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2219 | if (err) { |
2220 | retcode = ERR_MANDATORY_TAG; | |
2221 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
b411b363 PR |
2222 | goto fail; |
2223 | } | |
2224 | } | |
2225 | ||
85f75dd7 LE |
2226 | rv = conn_try_disconnect(tconn, parms.force_disconnect); |
2227 | if (rv < SS_SUCCESS) | |
f3dfa40a LE |
2228 | retcode = rv; /* FIXME: Type mismatch. */ |
2229 | else | |
2230 | retcode = NO_ERROR; | |
b411b363 | 2231 | fail: |
3b98c0c2 | 2232 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2233 | return 0; |
2234 | } | |
2235 | ||
2236 | void resync_after_online_grow(struct drbd_conf *mdev) | |
2237 | { | |
2238 | int iass; /* I am sync source */ | |
2239 | ||
2240 | dev_info(DEV, "Resync of new storage after online grow\n"); | |
2241 | if (mdev->state.role != mdev->state.peer) | |
2242 | iass = (mdev->state.role == R_PRIMARY); | |
2243 | else | |
427c0434 | 2244 | iass = test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags); |
b411b363 PR |
2245 | |
2246 | if (iass) | |
2247 | drbd_start_resync(mdev, C_SYNC_SOURCE); | |
2248 | else | |
2249 | _drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); | |
2250 | } | |
2251 | ||
3b98c0c2 | 2252 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2253 | { |
daeda1cc | 2254 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 LE |
2255 | struct resize_parms rs; |
2256 | struct drbd_conf *mdev; | |
2257 | enum drbd_ret_code retcode; | |
b411b363 | 2258 | enum determine_dev_size dd; |
6495d2c6 | 2259 | enum dds_flags ddsf; |
daeda1cc | 2260 | sector_t u_size; |
3b98c0c2 | 2261 | int err; |
b411b363 | 2262 | |
3b98c0c2 LE |
2263 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2264 | if (!adm_ctx.reply_skb) | |
2265 | return retcode; | |
2266 | if (retcode != NO_ERROR) | |
b411b363 | 2267 | goto fail; |
3b98c0c2 LE |
2268 | |
2269 | memset(&rs, 0, sizeof(struct resize_parms)); | |
2270 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { | |
f399002e | 2271 | err = resize_parms_from_attrs(&rs, info); |
b411b363 | 2272 | if (err) { |
3b98c0c2 LE |
2273 | retcode = ERR_MANDATORY_TAG; |
2274 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
b411b363 PR |
2275 | goto fail; |
2276 | } | |
2277 | } | |
2278 | ||
3b98c0c2 | 2279 | mdev = adm_ctx.mdev; |
b411b363 PR |
2280 | if (mdev->state.conn > C_CONNECTED) { |
2281 | retcode = ERR_RESIZE_RESYNC; | |
2282 | goto fail; | |
b411b363 | 2283 | } |
b411b363 | 2284 | |
b411b363 PR |
2285 | if (mdev->state.role == R_SECONDARY && |
2286 | mdev->state.peer == R_SECONDARY) { | |
2287 | retcode = ERR_NO_PRIMARY; | |
2288 | goto fail; | |
2289 | } | |
ef50a3e3 | 2290 | |
b411b363 PR |
2291 | if (!get_ldev(mdev)) { |
2292 | retcode = ERR_NO_DISK; | |
b411b363 | 2293 | goto fail; |
b411b363 | 2294 | } |
b411b363 | 2295 | |
31890f4a | 2296 | if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { |
6495d2c6 | 2297 | retcode = ERR_NEED_APV_93; |
9bcd2521 | 2298 | goto fail_ldev; |
6495d2c6 PR |
2299 | } |
2300 | ||
daeda1cc PR |
2301 | rcu_read_lock(); |
2302 | u_size = rcu_dereference(mdev->ldev->disk_conf)->disk_size; | |
2303 | rcu_read_unlock(); | |
2304 | if (u_size != (sector_t)rs.resize_size) { | |
2305 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2306 | if (!new_disk_conf) { | |
778f271d | 2307 | retcode = ERR_NOMEM; |
9bcd2521 | 2308 | goto fail_ldev; |
778f271d PR |
2309 | } |
2310 | } | |
2311 | ||
087c2492 | 2312 | if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) |
b411b363 | 2313 | mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); |
b411b363 | 2314 | |
daeda1cc PR |
2315 | if (new_disk_conf) { |
2316 | mutex_lock(&mdev->tconn->conf_update); | |
2317 | old_disk_conf = mdev->ldev->disk_conf; | |
2318 | *new_disk_conf = *old_disk_conf; | |
2319 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
2320 | rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf); | |
2321 | mutex_unlock(&mdev->tconn->conf_update); | |
2322 | synchronize_rcu(); | |
2323 | kfree(old_disk_conf); | |
b411b363 PR |
2324 | } |
2325 | ||
6495d2c6 | 2326 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
24c4830c | 2327 | dd = drbd_determine_dev_size(mdev, ddsf); |
b411b363 PR |
2328 | drbd_md_sync(mdev); |
2329 | put_ldev(mdev); | |
2330 | if (dd == dev_size_error) { | |
2331 | retcode = ERR_NOMEM_BITMAP; | |
2332 | goto fail; | |
b411b363 | 2333 | } |
778f271d | 2334 | |
087c2492 | 2335 | if (mdev->state.conn == C_CONNECTED) { |
b411b363 PR |
2336 | if (dd == grew) |
2337 | set_bit(RESIZE_PENDING, &mdev->flags); | |
2338 | ||
2339 | drbd_send_uuids(mdev); | |
6495d2c6 | 2340 | drbd_send_sizes(mdev, 1, ddsf); |
778f271d PR |
2341 | } |
2342 | ||
b411b363 | 2343 | fail: |
3b98c0c2 | 2344 | drbd_adm_finish(info, retcode); |
b411b363 | 2345 | return 0; |
b411b363 | 2346 | |
9bcd2521 PR |
2347 | fail_ldev: |
2348 | put_ldev(mdev); | |
2349 | goto fail; | |
b411b363 | 2350 | } |
b411b363 | 2351 | |
f399002e | 2352 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2353 | { |
3b98c0c2 | 2354 | enum drbd_ret_code retcode; |
f399002e | 2355 | struct drbd_tconn *tconn; |
b57a1e27 | 2356 | struct res_opts res_opts; |
f399002e | 2357 | int err; |
b411b363 | 2358 | |
44e52cfa | 2359 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
2360 | if (!adm_ctx.reply_skb) |
2361 | return retcode; | |
2362 | if (retcode != NO_ERROR) | |
2363 | goto fail; | |
f399002e | 2364 | tconn = adm_ctx.tconn; |
b411b363 | 2365 | |
b57a1e27 | 2366 | res_opts = tconn->res_opts; |
5979e361 | 2367 | if (should_set_defaults(info)) |
b966b5dd | 2368 | set_res_opts_defaults(&res_opts); |
b411b363 | 2369 | |
b57a1e27 | 2370 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2371 | if (err && err != -ENOMSG) { |
b411b363 | 2372 | retcode = ERR_MANDATORY_TAG; |
3b98c0c2 | 2373 | drbd_msg_put_info(from_attrs_err_to_txt(err)); |
b411b363 PR |
2374 | goto fail; |
2375 | } | |
2376 | ||
afbbfa88 AG |
2377 | err = set_resource_options(tconn, &res_opts); |
2378 | if (err) { | |
2379 | retcode = ERR_INVALID_REQUEST; | |
2380 | if (err == -ENOMEM) | |
2381 | retcode = ERR_NOMEM; | |
b411b363 PR |
2382 | } |
2383 | ||
b411b363 | 2384 | fail: |
3b98c0c2 | 2385 | drbd_adm_finish(info, retcode); |
b411b363 PR |
2386 | return 0; |
2387 | } | |
2388 | ||
3b98c0c2 | 2389 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2390 | { |
3b98c0c2 LE |
2391 | struct drbd_conf *mdev; |
2392 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2393 | ||
2394 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2395 | if (!adm_ctx.reply_skb) | |
2396 | return retcode; | |
2397 | if (retcode != NO_ERROR) | |
2398 | goto out; | |
2399 | ||
2400 | mdev = adm_ctx.mdev; | |
b411b363 | 2401 | |
194bfb32 | 2402 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
2403 | * resync just being finished, wait for it before requesting a new resync. |
2404 | * Also wait for it's after_state_ch(). */ | |
a574daf5 | 2405 | drbd_suspend_io(mdev); |
194bfb32 | 2406 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
7ee1fb93 | 2407 | drbd_flush_workqueue(mdev); |
194bfb32 | 2408 | |
b411b363 PR |
2409 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED); |
2410 | ||
2411 | if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION) | |
2412 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2413 | ||
2414 | while (retcode == SS_NEED_CONNECTION) { | |
87eeee41 | 2415 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2416 | if (mdev->state.conn < C_CONNECTED) |
2417 | retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); | |
87eeee41 | 2418 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
2419 | |
2420 | if (retcode != SS_NEED_CONNECTION) | |
2421 | break; | |
2422 | ||
2423 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); | |
2424 | } | |
a574daf5 | 2425 | drbd_resume_io(mdev); |
b411b363 | 2426 | |
3b98c0c2 LE |
2427 | out: |
2428 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2429 | return 0; |
2430 | } | |
2431 | ||
3b98c0c2 LE |
2432 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2433 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2434 | { |
3b98c0c2 | 2435 | enum drbd_ret_code retcode; |
194bfb32 | 2436 | |
3b98c0c2 LE |
2437 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2438 | if (!adm_ctx.reply_skb) | |
2439 | return retcode; | |
2440 | if (retcode != NO_ERROR) | |
2441 | goto out; | |
b411b363 | 2442 | |
3b98c0c2 LE |
2443 | retcode = drbd_request_state(adm_ctx.mdev, mask, val); |
2444 | out: | |
2445 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2446 | return 0; |
2447 | } | |
2448 | ||
0778286a PR |
2449 | static int drbd_bmio_set_susp_al(struct drbd_conf *mdev) |
2450 | { | |
2451 | int rv; | |
2452 | ||
2453 | rv = drbd_bmio_set_n_write(mdev); | |
2454 | drbd_suspend_al(mdev); | |
2455 | return rv; | |
2456 | } | |
2457 | ||
3b98c0c2 | 2458 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2459 | { |
25b0d6c8 PR |
2460 | int retcode; /* drbd_ret_code, drbd_state_rv */ |
2461 | struct drbd_conf *mdev; | |
2462 | ||
2463 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2464 | if (!adm_ctx.reply_skb) | |
2465 | return retcode; | |
2466 | if (retcode != NO_ERROR) | |
2467 | goto out; | |
2468 | ||
2469 | mdev = adm_ctx.mdev; | |
b411b363 | 2470 | |
194bfb32 | 2471 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
2472 | * resync just being finished, wait for it before requesting a new resync. |
2473 | * Also wait for it's after_state_ch(). */ | |
a574daf5 | 2474 | drbd_suspend_io(mdev); |
5016b82a | 2475 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
7ee1fb93 | 2476 | drbd_flush_workqueue(mdev); |
194bfb32 | 2477 | |
0778286a | 2478 | retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED); |
0778286a PR |
2479 | if (retcode < SS_SUCCESS) { |
2480 | if (retcode == SS_NEED_CONNECTION && mdev->state.role == R_PRIMARY) { | |
25b0d6c8 PR |
2481 | /* The peer will get a resync upon connect anyways. |
2482 | * Just make that into a full resync. */ | |
0778286a PR |
2483 | retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT)); |
2484 | if (retcode >= SS_SUCCESS) { | |
0778286a | 2485 | if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al, |
25b0d6c8 PR |
2486 | "set_n_write from invalidate_peer", |
2487 | BM_LOCKED_SET_ALLOWED)) | |
0778286a PR |
2488 | retcode = ERR_IO_MD_DISK; |
2489 | } | |
2490 | } else | |
2491 | retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S)); | |
2492 | } | |
a574daf5 | 2493 | drbd_resume_io(mdev); |
b411b363 | 2494 | |
25b0d6c8 PR |
2495 | out: |
2496 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2497 | return 0; |
2498 | } | |
2499 | ||
3b98c0c2 | 2500 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2501 | { |
3b98c0c2 | 2502 | enum drbd_ret_code retcode; |
b411b363 | 2503 | |
3b98c0c2 LE |
2504 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2505 | if (!adm_ctx.reply_skb) | |
2506 | return retcode; | |
2507 | if (retcode != NO_ERROR) | |
2508 | goto out; | |
b411b363 | 2509 | |
3b98c0c2 LE |
2510 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
2511 | retcode = ERR_PAUSE_IS_SET; | |
2512 | out: | |
2513 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2514 | return 0; |
2515 | } | |
2516 | ||
3b98c0c2 | 2517 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2518 | { |
da9fbc27 | 2519 | union drbd_dev_state s; |
3b98c0c2 LE |
2520 | enum drbd_ret_code retcode; |
2521 | ||
2522 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2523 | if (!adm_ctx.reply_skb) | |
2524 | return retcode; | |
2525 | if (retcode != NO_ERROR) | |
2526 | goto out; | |
b411b363 | 2527 | |
3b98c0c2 LE |
2528 | if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2529 | s = adm_ctx.mdev->state; | |
cd88d030 PR |
2530 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2531 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2532 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2533 | } else { | |
2534 | retcode = ERR_PAUSE_IS_CLEAR; | |
2535 | } | |
2536 | } | |
b411b363 | 2537 | |
3b98c0c2 LE |
2538 | out: |
2539 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2540 | return 0; |
2541 | } | |
2542 | ||
3b98c0c2 | 2543 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2544 | { |
3b98c0c2 | 2545 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2546 | } |
2547 | ||
3b98c0c2 | 2548 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2549 | { |
3b98c0c2 LE |
2550 | struct drbd_conf *mdev; |
2551 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ | |
2552 | ||
2553 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); | |
2554 | if (!adm_ctx.reply_skb) | |
2555 | return retcode; | |
2556 | if (retcode != NO_ERROR) | |
2557 | goto out; | |
2558 | ||
2559 | mdev = adm_ctx.mdev; | |
43a5182c PR |
2560 | if (test_bit(NEW_CUR_UUID, &mdev->flags)) { |
2561 | drbd_uuid_new_current(mdev); | |
2562 | clear_bit(NEW_CUR_UUID, &mdev->flags); | |
43a5182c | 2563 | } |
265be2d0 | 2564 | drbd_suspend_io(mdev); |
3b98c0c2 LE |
2565 | retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); |
2566 | if (retcode == SS_SUCCESS) { | |
265be2d0 | 2567 | if (mdev->state.conn < C_CONNECTED) |
2f5cdd0b | 2568 | tl_clear(mdev->tconn); |
265be2d0 | 2569 | if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) |
2f5cdd0b | 2570 | tl_restart(mdev->tconn, FAIL_FROZEN_DISK_IO); |
265be2d0 PR |
2571 | } |
2572 | drbd_resume_io(mdev); | |
2573 | ||
3b98c0c2 LE |
2574 | out: |
2575 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2576 | return 0; |
2577 | } | |
2578 | ||
3b98c0c2 | 2579 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2580 | { |
3b98c0c2 | 2581 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2582 | } |
2583 | ||
089c075d | 2584 | int nla_put_drbd_cfg_context(struct sk_buff *skb, struct drbd_tconn *tconn, unsigned vnr) |
b411b363 | 2585 | { |
543cc10b LE |
2586 | struct nlattr *nla; |
2587 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2588 | if (!nla) | |
2589 | goto nla_put_failure; | |
26ec9287 AG |
2590 | if (vnr != VOLUME_UNSPECIFIED && |
2591 | nla_put_u32(skb, T_ctx_volume, vnr)) | |
2592 | goto nla_put_failure; | |
2593 | if (nla_put_string(skb, T_ctx_resource_name, tconn->name)) | |
2594 | goto nla_put_failure; | |
2595 | if (tconn->my_addr_len && | |
2596 | nla_put(skb, T_ctx_my_addr, tconn->my_addr_len, &tconn->my_addr)) | |
2597 | goto nla_put_failure; | |
2598 | if (tconn->peer_addr_len && | |
2599 | nla_put(skb, T_ctx_peer_addr, tconn->peer_addr_len, &tconn->peer_addr)) | |
2600 | goto nla_put_failure; | |
543cc10b LE |
2601 | nla_nest_end(skb, nla); |
2602 | return 0; | |
b411b363 | 2603 | |
543cc10b LE |
2604 | nla_put_failure: |
2605 | if (nla) | |
2606 | nla_nest_cancel(skb, nla); | |
2607 | return -EMSGSIZE; | |
2608 | } | |
b411b363 | 2609 | |
3b98c0c2 LE |
2610 | int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, |
2611 | const struct sib_info *sib) | |
b411b363 | 2612 | { |
3b98c0c2 | 2613 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
44ed167d | 2614 | struct net_conf *nc; |
3b98c0c2 LE |
2615 | struct nlattr *nla; |
2616 | int got_ldev; | |
3b98c0c2 LE |
2617 | int err = 0; |
2618 | int exclude_sensitive; | |
2619 | ||
2620 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2621 | * to. So we better exclude_sensitive information. | |
2622 | * | |
2623 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2624 | * in the context of the requesting user process. Exclude sensitive | |
2625 | * information, unless current has superuser. | |
2626 | * | |
2627 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2628 | * relies on the current implementation of netlink_dump(), which | |
2629 | * executes the dump callback successively from netlink_recvmsg(), | |
2630 | * always in the context of the receiving process */ | |
2631 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2632 | ||
2633 | got_ldev = get_ldev(mdev); | |
3b98c0c2 LE |
2634 | |
2635 | /* We need to add connection name and volume number information still. | |
2636 | * Minor number is in drbd_genlmsghdr. */ | |
089c075d | 2637 | if (nla_put_drbd_cfg_context(skb, mdev->tconn, mdev->vnr)) |
3b98c0c2 | 2638 | goto nla_put_failure; |
3b98c0c2 | 2639 | |
f399002e LE |
2640 | if (res_opts_to_skb(skb, &mdev->tconn->res_opts, exclude_sensitive)) |
2641 | goto nla_put_failure; | |
2642 | ||
daeda1cc | 2643 | rcu_read_lock(); |
3b98c0c2 | 2644 | if (got_ldev) |
daeda1cc | 2645 | if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive)) |
3b98c0c2 | 2646 | goto nla_put_failure; |
44ed167d | 2647 | |
44ed167d PR |
2648 | nc = rcu_dereference(mdev->tconn->net_conf); |
2649 | if (nc) | |
2650 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2651 | rcu_read_unlock(); | |
2652 | if (err) | |
2653 | goto nla_put_failure; | |
3b98c0c2 | 2654 | |
3b98c0c2 LE |
2655 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2656 | if (!nla) | |
2657 | goto nla_put_failure; | |
26ec9287 AG |
2658 | if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) || |
2659 | nla_put_u32(skb, T_current_state, mdev->state.i) || | |
2660 | nla_put_u64(skb, T_ed_uuid, mdev->ed_uuid) || | |
3174f8c5 PM |
2661 | nla_put_u64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)) || |
2662 | nla_put_u64(skb, T_send_cnt, mdev->send_cnt) || | |
2663 | nla_put_u64(skb, T_recv_cnt, mdev->recv_cnt) || | |
2664 | nla_put_u64(skb, T_read_cnt, mdev->read_cnt) || | |
2665 | nla_put_u64(skb, T_writ_cnt, mdev->writ_cnt) || | |
2666 | nla_put_u64(skb, T_al_writ_cnt, mdev->al_writ_cnt) || | |
2667 | nla_put_u64(skb, T_bm_writ_cnt, mdev->bm_writ_cnt) || | |
2668 | nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&mdev->ap_bio_cnt)) || | |
2669 | nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&mdev->ap_pending_cnt)) || | |
2670 | nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&mdev->rs_pending_cnt))) | |
26ec9287 | 2671 | goto nla_put_failure; |
3b98c0c2 LE |
2672 | |
2673 | if (got_ldev) { | |
39a1aa7f | 2674 | int err; |
b411b363 | 2675 | |
39a1aa7f PR |
2676 | spin_lock_irq(&mdev->ldev->md.uuid_lock); |
2677 | err = nla_put(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); | |
2678 | spin_unlock_irq(&mdev->ldev->md.uuid_lock); | |
2679 | ||
2680 | if (err) | |
2681 | goto nla_put_failure; | |
2682 | ||
26ec9287 | 2683 | if (nla_put_u32(skb, T_disk_flags, mdev->ldev->md.flags) || |
26ec9287 AG |
2684 | nla_put_u64(skb, T_bits_total, drbd_bm_bits(mdev)) || |
2685 | nla_put_u64(skb, T_bits_oos, drbd_bm_total_weight(mdev))) | |
2686 | goto nla_put_failure; | |
3b98c0c2 LE |
2687 | if (C_SYNC_SOURCE <= mdev->state.conn && |
2688 | C_PAUSED_SYNC_T >= mdev->state.conn) { | |
26ec9287 AG |
2689 | if (nla_put_u64(skb, T_bits_rs_total, mdev->rs_total) || |
2690 | nla_put_u64(skb, T_bits_rs_failed, mdev->rs_failed)) | |
2691 | goto nla_put_failure; | |
3b98c0c2 | 2692 | } |
b411b363 | 2693 | } |
b411b363 | 2694 | |
3b98c0c2 LE |
2695 | if (sib) { |
2696 | switch(sib->sib_reason) { | |
2697 | case SIB_SYNC_PROGRESS: | |
2698 | case SIB_GET_STATUS_REPLY: | |
2699 | break; | |
2700 | case SIB_STATE_CHANGE: | |
26ec9287 AG |
2701 | if (nla_put_u32(skb, T_prev_state, sib->os.i) || |
2702 | nla_put_u32(skb, T_new_state, sib->ns.i)) | |
2703 | goto nla_put_failure; | |
3b98c0c2 LE |
2704 | break; |
2705 | case SIB_HELPER_POST: | |
26ec9287 AG |
2706 | if (nla_put_u32(skb, T_helper_exit_code, |
2707 | sib->helper_exit_code)) | |
2708 | goto nla_put_failure; | |
3b98c0c2 LE |
2709 | /* fall through */ |
2710 | case SIB_HELPER_PRE: | |
26ec9287 AG |
2711 | if (nla_put_string(skb, T_helper, sib->helper_name)) |
2712 | goto nla_put_failure; | |
3b98c0c2 LE |
2713 | break; |
2714 | } | |
b411b363 | 2715 | } |
3b98c0c2 | 2716 | nla_nest_end(skb, nla); |
b411b363 | 2717 | |
3b98c0c2 LE |
2718 | if (0) |
2719 | nla_put_failure: | |
2720 | err = -EMSGSIZE; | |
2721 | if (got_ldev) | |
2722 | put_ldev(mdev); | |
3b98c0c2 | 2723 | return err; |
b411b363 PR |
2724 | } |
2725 | ||
3b98c0c2 | 2726 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2727 | { |
3b98c0c2 LE |
2728 | enum drbd_ret_code retcode; |
2729 | int err; | |
b411b363 | 2730 | |
3b98c0c2 LE |
2731 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2732 | if (!adm_ctx.reply_skb) | |
2733 | return retcode; | |
2734 | if (retcode != NO_ERROR) | |
2735 | goto out; | |
b411b363 | 2736 | |
3b98c0c2 LE |
2737 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); |
2738 | if (err) { | |
2739 | nlmsg_free(adm_ctx.reply_skb); | |
2740 | return err; | |
b411b363 | 2741 | } |
3b98c0c2 LE |
2742 | out: |
2743 | drbd_adm_finish(info, retcode); | |
2744 | return 0; | |
b411b363 PR |
2745 | } |
2746 | ||
71932efc | 2747 | int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2748 | { |
3b98c0c2 LE |
2749 | struct drbd_conf *mdev; |
2750 | struct drbd_genlmsghdr *dh; | |
543cc10b LE |
2751 | struct drbd_tconn *pos = (struct drbd_tconn*)cb->args[0]; |
2752 | struct drbd_tconn *tconn = NULL; | |
2753 | struct drbd_tconn *tmp; | |
2754 | unsigned volume = cb->args[1]; | |
2755 | ||
2756 | /* Open coded, deferred, iteration: | |
2757 | * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) { | |
2758 | * idr_for_each_entry(&tconn->volumes, mdev, i) { | |
2759 | * ... | |
2760 | * } | |
2761 | * } | |
2762 | * where tconn is cb->args[0]; | |
2763 | * and i is cb->args[1]; | |
2764 | * | |
71932efc LE |
2765 | * cb->args[2] indicates if we shall loop over all resources, |
2766 | * or just dump all volumes of a single resource. | |
2767 | * | |
3b98c0c2 LE |
2768 | * This may miss entries inserted after this dump started, |
2769 | * or entries deleted before they are reached. | |
543cc10b LE |
2770 | * |
2771 | * We need to make sure the mdev won't disappear while | |
2772 | * we are looking at it, and revalidate our iterators | |
2773 | * on each iteration. | |
2774 | */ | |
b411b363 | 2775 | |
9dc9fbb3 | 2776 | /* synchronize with conn_create()/conn_destroy() */ |
c141ebda | 2777 | rcu_read_lock(); |
543cc10b | 2778 | /* revalidate iterator position */ |
ec0bddbc | 2779 | list_for_each_entry_rcu(tmp, &drbd_tconns, all_tconn) { |
543cc10b LE |
2780 | if (pos == NULL) { |
2781 | /* first iteration */ | |
2782 | pos = tmp; | |
2783 | tconn = pos; | |
2784 | break; | |
2785 | } | |
2786 | if (tmp == pos) { | |
2787 | tconn = pos; | |
2788 | break; | |
2789 | } | |
b411b363 | 2790 | } |
543cc10b | 2791 | if (tconn) { |
71932efc | 2792 | next_tconn: |
543cc10b LE |
2793 | mdev = idr_get_next(&tconn->volumes, &volume); |
2794 | if (!mdev) { | |
2795 | /* No more volumes to dump on this tconn. | |
2796 | * Advance tconn iterator. */ | |
ec0bddbc PR |
2797 | pos = list_entry_rcu(tconn->all_tconn.next, |
2798 | struct drbd_tconn, all_tconn); | |
71932efc | 2799 | /* Did we dump any volume on this tconn yet? */ |
543cc10b | 2800 | if (volume != 0) { |
71932efc LE |
2801 | /* If we reached the end of the list, |
2802 | * or only a single resource dump was requested, | |
2803 | * we are done. */ | |
2804 | if (&pos->all_tconn == &drbd_tconns || cb->args[2]) | |
2805 | goto out; | |
543cc10b | 2806 | volume = 0; |
71932efc | 2807 | tconn = pos; |
543cc10b LE |
2808 | goto next_tconn; |
2809 | } | |
2810 | } | |
2811 | ||
98683650 | 2812 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, |
3b98c0c2 LE |
2813 | cb->nlh->nlmsg_seq, &drbd_genl_family, |
2814 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
2815 | if (!dh) | |
543cc10b LE |
2816 | goto out; |
2817 | ||
2818 | if (!mdev) { | |
367d675d LE |
2819 | /* This is a tconn without a single volume. |
2820 | * Suprisingly enough, it may have a network | |
2821 | * configuration. */ | |
2822 | struct net_conf *nc; | |
543cc10b LE |
2823 | dh->minor = -1U; |
2824 | dh->ret_code = NO_ERROR; | |
089c075d | 2825 | if (nla_put_drbd_cfg_context(skb, tconn, VOLUME_UNSPECIFIED)) |
367d675d LE |
2826 | goto cancel; |
2827 | nc = rcu_dereference(tconn->net_conf); | |
2828 | if (nc && net_conf_to_skb(skb, nc, 1) != 0) | |
2829 | goto cancel; | |
2830 | goto done; | |
543cc10b | 2831 | } |
b411b363 | 2832 | |
543cc10b LE |
2833 | D_ASSERT(mdev->vnr == volume); |
2834 | D_ASSERT(mdev->tconn == tconn); | |
3b98c0c2 | 2835 | |
543cc10b | 2836 | dh->minor = mdev_to_minor(mdev); |
3b98c0c2 LE |
2837 | dh->ret_code = NO_ERROR; |
2838 | ||
2839 | if (nla_put_status_info(skb, mdev, NULL)) { | |
367d675d | 2840 | cancel: |
3b98c0c2 | 2841 | genlmsg_cancel(skb, dh); |
543cc10b | 2842 | goto out; |
3b98c0c2 | 2843 | } |
367d675d | 2844 | done: |
3b98c0c2 LE |
2845 | genlmsg_end(skb, dh); |
2846 | } | |
b411b363 | 2847 | |
543cc10b | 2848 | out: |
c141ebda | 2849 | rcu_read_unlock(); |
543cc10b LE |
2850 | /* where to start the next iteration */ |
2851 | cb->args[0] = (long)pos; | |
2852 | cb->args[1] = (pos == tconn) ? volume + 1 : 0; | |
b411b363 | 2853 | |
543cc10b LE |
2854 | /* No more tconns/volumes/minors found results in an empty skb. |
2855 | * Which will terminate the dump. */ | |
3b98c0c2 | 2856 | return skb->len; |
b411b363 PR |
2857 | } |
2858 | ||
71932efc LE |
2859 | /* |
2860 | * Request status of all resources, or of all volumes within a single resource. | |
2861 | * | |
2862 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
2863 | * Which means we cannot use the family->attrbuf or other such members, because | |
2864 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
2865 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
2866 | * | |
2867 | * Once things are setup properly, we call into get_one_status(). | |
b411b363 | 2868 | */ |
71932efc | 2869 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 2870 | { |
71932efc LE |
2871 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; |
2872 | struct nlattr *nla; | |
7c3063cc | 2873 | const char *resource_name; |
71932efc | 2874 | struct drbd_tconn *tconn; |
7c3063cc | 2875 | int maxtype; |
71932efc LE |
2876 | |
2877 | /* Is this a followup call? */ | |
2878 | if (cb->args[0]) { | |
2879 | /* ... of a single resource dump, | |
2880 | * and the resource iterator has been advanced already? */ | |
2881 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
2882 | return 0; /* DONE. */ | |
2883 | goto dump; | |
2884 | } | |
2885 | ||
2886 | /* First call (from netlink_dump_start). We need to figure out | |
2887 | * which resource(s) the user wants us to dump. */ | |
2888 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
2889 | nlmsg_attrlen(cb->nlh, hdrlen), | |
2890 | DRBD_NLA_CFG_CONTEXT); | |
2891 | ||
2892 | /* No explicit context given. Dump all. */ | |
2893 | if (!nla) | |
2894 | goto dump; | |
7c3063cc AG |
2895 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
2896 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
2897 | if (IS_ERR(nla)) | |
2898 | return PTR_ERR(nla); | |
71932efc LE |
2899 | /* context given, but no name present? */ |
2900 | if (!nla) | |
2901 | return -EINVAL; | |
7c3063cc AG |
2902 | resource_name = nla_data(nla); |
2903 | tconn = conn_get_by_name(resource_name); | |
0ace9dfa | 2904 | |
71932efc LE |
2905 | if (!tconn) |
2906 | return -ENODEV; | |
2907 | ||
0ace9dfa PR |
2908 | kref_put(&tconn->kref, &conn_destroy); /* get_one_status() (re)validates tconn by itself */ |
2909 | ||
71932efc LE |
2910 | /* prime iterators, and set "filter" mode mark: |
2911 | * only dump this tconn. */ | |
2912 | cb->args[0] = (long)tconn; | |
2913 | /* cb->args[1] = 0; passed in this way. */ | |
2914 | cb->args[2] = (long)tconn; | |
2915 | ||
2916 | dump: | |
2917 | return get_one_status(skb, cb); | |
2918 | } | |
b411b363 | 2919 | |
3b98c0c2 | 2920 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2921 | { |
3b98c0c2 LE |
2922 | enum drbd_ret_code retcode; |
2923 | struct timeout_parms tp; | |
2924 | int err; | |
b411b363 | 2925 | |
3b98c0c2 LE |
2926 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2927 | if (!adm_ctx.reply_skb) | |
2928 | return retcode; | |
2929 | if (retcode != NO_ERROR) | |
2930 | goto out; | |
b411b363 | 2931 | |
3b98c0c2 LE |
2932 | tp.timeout_type = |
2933 | adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : | |
2934 | test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : | |
2935 | UT_DEFAULT; | |
b411b363 | 2936 | |
3b98c0c2 LE |
2937 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
2938 | if (err) { | |
2939 | nlmsg_free(adm_ctx.reply_skb); | |
2940 | return err; | |
2941 | } | |
2942 | out: | |
2943 | drbd_adm_finish(info, retcode); | |
2944 | return 0; | |
b411b363 PR |
2945 | } |
2946 | ||
3b98c0c2 | 2947 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2948 | { |
3b98c0c2 LE |
2949 | struct drbd_conf *mdev; |
2950 | enum drbd_ret_code retcode; | |
58ffa580 | 2951 | struct start_ov_parms parms; |
b411b363 | 2952 | |
3b98c0c2 LE |
2953 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2954 | if (!adm_ctx.reply_skb) | |
2955 | return retcode; | |
2956 | if (retcode != NO_ERROR) | |
2957 | goto out; | |
873b0d5f | 2958 | |
3b98c0c2 | 2959 | mdev = adm_ctx.mdev; |
58ffa580 LE |
2960 | |
2961 | /* resume from last known position, if possible */ | |
2962 | parms.ov_start_sector = mdev->ov_start_sector; | |
2963 | parms.ov_stop_sector = ULLONG_MAX; | |
3b98c0c2 | 2964 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { |
f399002e | 2965 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2966 | if (err) { |
2967 | retcode = ERR_MANDATORY_TAG; | |
2968 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
2969 | goto out; | |
2970 | } | |
b411b363 | 2971 | } |
58ffa580 LE |
2972 | /* w_make_ov_request expects position to be aligned */ |
2973 | mdev->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1); | |
2974 | mdev->ov_stop_sector = parms.ov_stop_sector; | |
873b0d5f LE |
2975 | |
2976 | /* If there is still bitmap IO pending, e.g. previous resync or verify | |
2977 | * just being finished, wait for it before requesting a new resync. */ | |
a574daf5 | 2978 | drbd_suspend_io(mdev); |
873b0d5f | 2979 | wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags)); |
3b98c0c2 | 2980 | retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); |
a574daf5 | 2981 | drbd_resume_io(mdev); |
3b98c0c2 LE |
2982 | out: |
2983 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
2984 | return 0; |
2985 | } | |
2986 | ||
2987 | ||
3b98c0c2 | 2988 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2989 | { |
3b98c0c2 LE |
2990 | struct drbd_conf *mdev; |
2991 | enum drbd_ret_code retcode; | |
b411b363 PR |
2992 | int skip_initial_sync = 0; |
2993 | int err; | |
3b98c0c2 | 2994 | struct new_c_uuid_parms args; |
b411b363 | 2995 | |
3b98c0c2 LE |
2996 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
2997 | if (!adm_ctx.reply_skb) | |
2998 | return retcode; | |
2999 | if (retcode != NO_ERROR) | |
3000 | goto out_nolock; | |
b411b363 | 3001 | |
3b98c0c2 LE |
3002 | mdev = adm_ctx.mdev; |
3003 | memset(&args, 0, sizeof(args)); | |
3004 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 3005 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
3006 | if (err) { |
3007 | retcode = ERR_MANDATORY_TAG; | |
3008 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
3009 | goto out_nolock; | |
3010 | } | |
b411b363 PR |
3011 | } |
3012 | ||
8410da8f | 3013 | mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 PR |
3014 | |
3015 | if (!get_ldev(mdev)) { | |
3016 | retcode = ERR_NO_DISK; | |
3017 | goto out; | |
3018 | } | |
3019 | ||
3020 | /* this is "skip initial sync", assume to be clean */ | |
31890f4a | 3021 | if (mdev->state.conn == C_CONNECTED && mdev->tconn->agreed_pro_version >= 90 && |
b411b363 PR |
3022 | mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
3023 | dev_info(DEV, "Preparing to skip initial sync\n"); | |
3024 | skip_initial_sync = 1; | |
3025 | } else if (mdev->state.conn != C_STANDALONE) { | |
3026 | retcode = ERR_CONNECTED; | |
3027 | goto out_dec; | |
3028 | } | |
3029 | ||
3030 | drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ | |
3031 | drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */ | |
3032 | ||
3033 | if (args.clear_bm) { | |
20ceb2b2 LE |
3034 | err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, |
3035 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); | |
b411b363 PR |
3036 | if (err) { |
3037 | dev_err(DEV, "Writing bitmap failed with %d\n",err); | |
3038 | retcode = ERR_IO_MD_DISK; | |
3039 | } | |
3040 | if (skip_initial_sync) { | |
3041 | drbd_send_uuids_skip_initial_sync(mdev); | |
3042 | _drbd_uuid_set(mdev, UI_BITMAP, 0); | |
62b0da3a | 3043 | drbd_print_uuids(mdev, "cleared bitmap UUID"); |
87eeee41 | 3044 | spin_lock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
3045 | _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
3046 | CS_VERBOSE, NULL); | |
87eeee41 | 3047 | spin_unlock_irq(&mdev->tconn->req_lock); |
b411b363 PR |
3048 | } |
3049 | } | |
3050 | ||
3051 | drbd_md_sync(mdev); | |
3052 | out_dec: | |
3053 | put_ldev(mdev); | |
3054 | out: | |
8410da8f | 3055 | mutex_unlock(mdev->state_mutex); |
3b98c0c2 LE |
3056 | out_nolock: |
3057 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3058 | return 0; |
3059 | } | |
3060 | ||
3b98c0c2 | 3061 | static enum drbd_ret_code |
7c3063cc | 3062 | drbd_check_resource_name(const char *name) |
b411b363 | 3063 | { |
3b98c0c2 | 3064 | if (!name || !name[0]) { |
7c3063cc | 3065 | drbd_msg_put_info("resource name missing"); |
3b98c0c2 | 3066 | return ERR_MANDATORY_TAG; |
b411b363 | 3067 | } |
3b98c0c2 LE |
3068 | /* if we want to use these in sysfs/configfs/debugfs some day, |
3069 | * we must not allow slashes */ | |
3070 | if (strchr(name, '/')) { | |
7c3063cc | 3071 | drbd_msg_put_info("invalid resource name"); |
3b98c0c2 | 3072 | return ERR_INVALID_REQUEST; |
b411b363 | 3073 | } |
3b98c0c2 | 3074 | return NO_ERROR; |
774b3055 | 3075 | } |
b411b363 | 3076 | |
789c1b62 | 3077 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3078 | { |
3b98c0c2 | 3079 | enum drbd_ret_code retcode; |
afbbfa88 AG |
3080 | struct res_opts res_opts; |
3081 | int err; | |
b411b363 | 3082 | |
3b98c0c2 LE |
3083 | retcode = drbd_adm_prepare(skb, info, 0); |
3084 | if (!adm_ctx.reply_skb) | |
3085 | return retcode; | |
3086 | if (retcode != NO_ERROR) | |
3087 | goto out; | |
b411b363 | 3088 | |
afbbfa88 AG |
3089 | set_res_opts_defaults(&res_opts); |
3090 | err = res_opts_from_attrs(&res_opts, info); | |
3091 | if (err && err != -ENOMSG) { | |
3092 | retcode = ERR_MANDATORY_TAG; | |
3093 | drbd_msg_put_info(from_attrs_err_to_txt(err)); | |
3094 | goto out; | |
b411b363 PR |
3095 | } |
3096 | ||
7c3063cc | 3097 | retcode = drbd_check_resource_name(adm_ctx.resource_name); |
3b98c0c2 LE |
3098 | if (retcode != NO_ERROR) |
3099 | goto out; | |
b411b363 | 3100 | |
3b98c0c2 | 3101 | if (adm_ctx.tconn) { |
38f19616 LE |
3102 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
3103 | retcode = ERR_INVALID_REQUEST; | |
789c1b62 | 3104 | drbd_msg_put_info("resource exists"); |
38f19616 LE |
3105 | } |
3106 | /* else: still NO_ERROR */ | |
3b98c0c2 | 3107 | goto out; |
b411b363 | 3108 | } |
b411b363 | 3109 | |
afbbfa88 | 3110 | if (!conn_create(adm_ctx.resource_name, &res_opts)) |
b411b363 | 3111 | retcode = ERR_NOMEM; |
3b98c0c2 LE |
3112 | out: |
3113 | drbd_adm_finish(info, retcode); | |
3114 | return 0; | |
b411b363 PR |
3115 | } |
3116 | ||
3b98c0c2 | 3117 | int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3118 | { |
3b98c0c2 LE |
3119 | struct drbd_genlmsghdr *dh = info->userhdr; |
3120 | enum drbd_ret_code retcode; | |
b411b363 | 3121 | |
44e52cfa | 3122 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
3123 | if (!adm_ctx.reply_skb) |
3124 | return retcode; | |
3125 | if (retcode != NO_ERROR) | |
3126 | goto out; | |
b411b363 | 3127 | |
f2257a56 | 3128 | if (dh->minor > MINORMASK) { |
3b98c0c2 LE |
3129 | drbd_msg_put_info("requested minor out of range"); |
3130 | retcode = ERR_INVALID_REQUEST; | |
3131 | goto out; | |
b411b363 | 3132 | } |
0c8e36d9 | 3133 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
3b98c0c2 LE |
3134 | drbd_msg_put_info("requested volume id out of range"); |
3135 | retcode = ERR_INVALID_REQUEST; | |
3136 | goto out; | |
b411b363 | 3137 | } |
b411b363 | 3138 | |
38f19616 LE |
3139 | /* drbd_adm_prepare made sure already |
3140 | * that mdev->tconn and mdev->vnr match the request. */ | |
3141 | if (adm_ctx.mdev) { | |
3142 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) | |
3143 | retcode = ERR_MINOR_EXISTS; | |
3144 | /* else: still NO_ERROR */ | |
3145 | goto out; | |
b411b363 | 3146 | } |
38f19616 | 3147 | |
3b98c0c2 LE |
3148 | retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); |
3149 | out: | |
3150 | drbd_adm_finish(info, retcode); | |
3151 | return 0; | |
b411b363 PR |
3152 | } |
3153 | ||
85f75dd7 | 3154 | static enum drbd_ret_code adm_delete_minor(struct drbd_conf *mdev) |
b411b363 | 3155 | { |
85f75dd7 LE |
3156 | if (mdev->state.disk == D_DISKLESS && |
3157 | /* no need to be mdev->state.conn == C_STANDALONE && | |
3158 | * we may want to delete a minor from a live replication group. | |
3159 | */ | |
3160 | mdev->state.role == R_SECONDARY) { | |
369bea63 PR |
3161 | _drbd_request_state(mdev, NS(conn, C_WF_REPORT_PARAMS), |
3162 | CS_VERBOSE + CS_WAIT_COMPLETE); | |
81fa2e67 PR |
3163 | idr_remove(&mdev->tconn->volumes, mdev->vnr); |
3164 | idr_remove(&minors, mdev_to_minor(mdev)); | |
3165 | del_gendisk(mdev->vdisk); | |
3166 | synchronize_rcu(); | |
3167 | kref_put(&mdev->kref, &drbd_minor_destroy); | |
85f75dd7 LE |
3168 | return NO_ERROR; |
3169 | } else | |
3170 | return ERR_MINOR_CONFIGURED; | |
b411b363 PR |
3171 | } |
3172 | ||
3b98c0c2 | 3173 | int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3174 | { |
3b98c0c2 | 3175 | enum drbd_ret_code retcode; |
b411b363 | 3176 | |
3b98c0c2 LE |
3177 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); |
3178 | if (!adm_ctx.reply_skb) | |
3179 | return retcode; | |
3180 | if (retcode != NO_ERROR) | |
3181 | goto out; | |
b411b363 | 3182 | |
85f75dd7 | 3183 | retcode = adm_delete_minor(adm_ctx.mdev); |
85f75dd7 LE |
3184 | out: |
3185 | drbd_adm_finish(info, retcode); | |
3186 | return 0; | |
b411b363 PR |
3187 | } |
3188 | ||
85f75dd7 | 3189 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3190 | { |
f3dfa40a | 3191 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 LE |
3192 | struct drbd_conf *mdev; |
3193 | unsigned i; | |
b411b363 | 3194 | |
85f75dd7 LE |
3195 | retcode = drbd_adm_prepare(skb, info, 0); |
3196 | if (!adm_ctx.reply_skb) | |
3197 | return retcode; | |
3198 | if (retcode != NO_ERROR) | |
3199 | goto out; | |
b411b363 | 3200 | |
85f75dd7 | 3201 | if (!adm_ctx.tconn) { |
789c1b62 | 3202 | retcode = ERR_RES_NOT_KNOWN; |
85f75dd7 | 3203 | goto out; |
b411b363 PR |
3204 | } |
3205 | ||
85f75dd7 LE |
3206 | /* demote */ |
3207 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3208 | retcode = drbd_set_role(mdev, R_SECONDARY, 0); | |
3209 | if (retcode < SS_SUCCESS) { | |
3210 | drbd_msg_put_info("failed to demote"); | |
c141ebda | 3211 | goto out; |
85f75dd7 | 3212 | } |
b411b363 | 3213 | } |
b411b363 | 3214 | |
f3dfa40a LE |
3215 | retcode = conn_try_disconnect(adm_ctx.tconn, 0); |
3216 | if (retcode < SS_SUCCESS) { | |
85f75dd7 | 3217 | drbd_msg_put_info("failed to disconnect"); |
f3dfa40a | 3218 | goto out; |
85f75dd7 | 3219 | } |
b411b363 | 3220 | |
85f75dd7 LE |
3221 | /* detach */ |
3222 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
cdfda633 | 3223 | retcode = adm_detach(mdev, 0); |
27012382 | 3224 | if (retcode < SS_SUCCESS || retcode > NO_ERROR) { |
85f75dd7 | 3225 | drbd_msg_put_info("failed to detach"); |
c141ebda | 3226 | goto out; |
85f75dd7 LE |
3227 | } |
3228 | } | |
b411b363 | 3229 | |
f3dfa40a LE |
3230 | /* If we reach this, all volumes (of this tconn) are Secondary, |
3231 | * Disconnected, Diskless, aka Unconfigured. Make sure all threads have | |
c141ebda | 3232 | * actually stopped, state handling only does drbd_thread_stop_nowait(). */ |
f3dfa40a | 3233 | drbd_thread_stop(&adm_ctx.tconn->worker); |
b411b363 | 3234 | |
f3dfa40a | 3235 | /* Now, nothing can fail anymore */ |
b411b363 | 3236 | |
85f75dd7 LE |
3237 | /* delete volumes */ |
3238 | idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) { | |
3239 | retcode = adm_delete_minor(mdev); | |
3240 | if (retcode != NO_ERROR) { | |
3241 | /* "can not happen" */ | |
3242 | drbd_msg_put_info("failed to delete volume"); | |
ef356262 | 3243 | goto out; |
85f75dd7 LE |
3244 | } |
3245 | } | |
b411b363 | 3246 | |
85f75dd7 LE |
3247 | /* delete connection */ |
3248 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { | |
ec0bddbc PR |
3249 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3250 | synchronize_rcu(); | |
9dc9fbb3 | 3251 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
b411b363 | 3252 | |
85f75dd7 LE |
3253 | retcode = NO_ERROR; |
3254 | } else { | |
3255 | /* "can not happen" */ | |
789c1b62 | 3256 | retcode = ERR_RES_IN_USE; |
85f75dd7 | 3257 | drbd_msg_put_info("failed to delete connection"); |
85f75dd7 | 3258 | } |
ef356262 | 3259 | goto out; |
3b98c0c2 LE |
3260 | out: |
3261 | drbd_adm_finish(info, retcode); | |
3262 | return 0; | |
b411b363 PR |
3263 | } |
3264 | ||
789c1b62 | 3265 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3266 | { |
3b98c0c2 | 3267 | enum drbd_ret_code retcode; |
b411b363 | 3268 | |
44e52cfa | 3269 | retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
3270 | if (!adm_ctx.reply_skb) |
3271 | return retcode; | |
3272 | if (retcode != NO_ERROR) | |
3273 | goto out; | |
b411b363 | 3274 | |
3b98c0c2 | 3275 | if (conn_lowest_minor(adm_ctx.tconn) < 0) { |
ec0bddbc PR |
3276 | list_del_rcu(&adm_ctx.tconn->all_tconn); |
3277 | synchronize_rcu(); | |
9dc9fbb3 PR |
3278 | kref_put(&adm_ctx.tconn->kref, &conn_destroy); |
3279 | ||
3b98c0c2 LE |
3280 | retcode = NO_ERROR; |
3281 | } else { | |
789c1b62 | 3282 | retcode = ERR_RES_IN_USE; |
b411b363 PR |
3283 | } |
3284 | ||
992d6e91 LE |
3285 | if (retcode == NO_ERROR) |
3286 | drbd_thread_stop(&adm_ctx.tconn->worker); | |
3b98c0c2 LE |
3287 | out: |
3288 | drbd_adm_finish(info, retcode); | |
b411b363 PR |
3289 | return 0; |
3290 | } | |
3291 | ||
3b98c0c2 | 3292 | void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) |
b411b363 | 3293 | { |
3b98c0c2 LE |
3294 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3295 | struct sk_buff *msg; | |
3296 | struct drbd_genlmsghdr *d_out; | |
3297 | unsigned seq; | |
3298 | int err = -ENOMEM; | |
3299 | ||
ef86b779 PR |
3300 | if (sib->sib_reason == SIB_SYNC_PROGRESS) { |
3301 | if (time_after(jiffies, mdev->rs_last_bcast + HZ)) | |
3302 | mdev->rs_last_bcast = jiffies; | |
3303 | else | |
3304 | return; | |
3305 | } | |
b411b363 | 3306 | |
3b98c0c2 LE |
3307 | seq = atomic_inc_return(&drbd_genl_seq); |
3308 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3309 | if (!msg) | |
3310 | goto failed; | |
3311 | ||
3312 | err = -EMSGSIZE; | |
3313 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3314 | if (!d_out) /* cannot happen, but anyways. */ | |
3315 | goto nla_put_failure; | |
3316 | d_out->minor = mdev_to_minor(mdev); | |
6f9b5f84 | 3317 | d_out->ret_code = NO_ERROR; |
3b98c0c2 LE |
3318 | |
3319 | if (nla_put_status_info(msg, mdev, sib)) | |
3320 | goto nla_put_failure; | |
3321 | genlmsg_end(msg, d_out); | |
3322 | err = drbd_genl_multicast_events(msg, 0); | |
3323 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3324 | if (err && err != -ESRCH) | |
3325 | goto failed; | |
b411b363 | 3326 | |
3b98c0c2 | 3327 | return; |
b411b363 | 3328 | |
3b98c0c2 LE |
3329 | nla_put_failure: |
3330 | nlmsg_free(msg); | |
3331 | failed: | |
3332 | dev_err(DEV, "Error %d while broadcasting event. " | |
3333 | "Event seq:%u sib_reason:%u\n", | |
3334 | err, seq, sib->sib_reason); | |
b411b363 | 3335 | } |