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Commit | Line | Data |
---|---|---|
b411b363 PR |
1 | /* |
2 | drbd_nl.c | |
3 | ||
4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
5 | ||
6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
9 | ||
10 | drbd is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | drbd is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with drbd; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | #include <linux/drbd.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
b411b363 PR |
32 | #include <linux/blkpg.h> |
33 | #include <linux/cpumask.h> | |
34 | #include "drbd_int.h" | |
a3603a6e | 35 | #include "drbd_protocol.h" |
265be2d0 | 36 | #include "drbd_req.h" |
b411b363 | 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 | ||
05a10ec7 AG |
47 | int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info); |
48 | int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info); | |
3b98c0c2 | 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 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) |
85 | { | |
86 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
87 | if (genlmsg_reply(skb, info)) | |
88 | printk(KERN_ERR "drbd: error sending genl reply\n"); | |
b411b363 | 89 | } |
3b98c0c2 LE |
90 | |
91 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
92 | * reason it could fail was no space in skb, and there are 4k available. */ | |
a910b123 | 93 | int drbd_msg_put_info(struct sk_buff *skb, const char *info) |
3b98c0c2 | 94 | { |
3b98c0c2 LE |
95 | struct nlattr *nla; |
96 | int err = -EMSGSIZE; | |
97 | ||
98 | if (!info || !info[0]) | |
99 | return 0; | |
100 | ||
101 | nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); | |
102 | if (!nla) | |
103 | return err; | |
104 | ||
105 | err = nla_put_string(skb, T_info_text, info); | |
106 | if (err) { | |
107 | nla_nest_cancel(skb, nla); | |
108 | return err; | |
109 | } else | |
110 | nla_nest_end(skb, nla); | |
111 | return 0; | |
b411b363 PR |
112 | } |
113 | ||
3b98c0c2 LE |
114 | /* This would be a good candidate for a "pre_doit" hook, |
115 | * and per-family private info->pointers. | |
116 | * But we need to stay compatible with older kernels. | |
117 | * If it returns successfully, adm_ctx members are valid. | |
9e276872 LE |
118 | * |
119 | * At this point, we still rely on the global genl_lock(). | |
120 | * If we want to avoid that, and allow "genl_family.parallel_ops", we may need | |
121 | * to add additional synchronization against object destruction/modification. | |
3b98c0c2 LE |
122 | */ |
123 | #define DRBD_ADM_NEED_MINOR 1 | |
44e52cfa | 124 | #define DRBD_ADM_NEED_RESOURCE 2 |
089c075d | 125 | #define DRBD_ADM_NEED_CONNECTION 4 |
a910b123 LE |
126 | static int drbd_adm_prepare(struct drbd_config_context *adm_ctx, |
127 | struct sk_buff *skb, struct genl_info *info, unsigned flags) | |
3b98c0c2 LE |
128 | { |
129 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
130 | const u8 cmd = info->genlhdr->cmd; | |
131 | int err; | |
132 | ||
a910b123 | 133 | memset(adm_ctx, 0, sizeof(*adm_ctx)); |
3b98c0c2 LE |
134 | |
135 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
98683650 | 136 | if (cmd != DRBD_ADM_GET_STATUS && !capable(CAP_NET_ADMIN)) |
3b98c0c2 LE |
137 | return -EPERM; |
138 | ||
a910b123 LE |
139 | adm_ctx->reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
140 | if (!adm_ctx->reply_skb) { | |
1e2a2551 | 141 | err = -ENOMEM; |
3b98c0c2 | 142 | goto fail; |
1e2a2551 | 143 | } |
3b98c0c2 | 144 | |
a910b123 | 145 | adm_ctx->reply_dh = genlmsg_put_reply(adm_ctx->reply_skb, |
3b98c0c2 LE |
146 | info, &drbd_genl_family, 0, cmd); |
147 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
148 | * but anyways */ | |
a910b123 | 149 | if (!adm_ctx->reply_dh) { |
1e2a2551 | 150 | err = -ENOMEM; |
3b98c0c2 | 151 | goto fail; |
1e2a2551 | 152 | } |
3b98c0c2 | 153 | |
a910b123 LE |
154 | adm_ctx->reply_dh->minor = d_in->minor; |
155 | adm_ctx->reply_dh->ret_code = NO_ERROR; | |
3b98c0c2 | 156 | |
a910b123 | 157 | adm_ctx->volume = VOLUME_UNSPECIFIED; |
3b98c0c2 LE |
158 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { |
159 | struct nlattr *nla; | |
160 | /* parse and validate only */ | |
f399002e | 161 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
162 | if (err) |
163 | goto fail; | |
164 | ||
165 | /* It was present, and valid, | |
166 | * copy it over to the reply skb. */ | |
a910b123 | 167 | err = nla_put_nohdr(adm_ctx->reply_skb, |
3b98c0c2 LE |
168 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, |
169 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
170 | if (err) | |
171 | goto fail; | |
172 | ||
9e276872 | 173 | /* and assign stuff to the adm_ctx */ |
3b98c0c2 | 174 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; |
089c075d | 175 | if (nla) |
a910b123 | 176 | adm_ctx->volume = nla_get_u32(nla); |
7c3063cc | 177 | nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
3b98c0c2 | 178 | if (nla) |
a910b123 LE |
179 | adm_ctx->resource_name = nla_data(nla); |
180 | adm_ctx->my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)]; | |
181 | adm_ctx->peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)]; | |
182 | if ((adm_ctx->my_addr && | |
183 | nla_len(adm_ctx->my_addr) > sizeof(adm_ctx->connection->my_addr)) || | |
184 | (adm_ctx->peer_addr && | |
185 | nla_len(adm_ctx->peer_addr) > sizeof(adm_ctx->connection->peer_addr))) { | |
089c075d AG |
186 | err = -EINVAL; |
187 | goto fail; | |
188 | } | |
189 | } | |
3b98c0c2 | 190 | |
a910b123 LE |
191 | adm_ctx->minor = d_in->minor; |
192 | adm_ctx->device = minor_to_device(d_in->minor); | |
9e276872 LE |
193 | |
194 | /* We are protected by the global genl_lock(). | |
195 | * But we may explicitly drop it/retake it in drbd_adm_set_role(), | |
196 | * so make sure this object stays around. */ | |
197 | if (adm_ctx->device) | |
198 | kref_get(&adm_ctx->device->kref); | |
199 | ||
a910b123 LE |
200 | if (adm_ctx->resource_name) { |
201 | adm_ctx->resource = drbd_find_resource(adm_ctx->resource_name); | |
4bc76048 | 202 | } |
3b98c0c2 | 203 | |
a910b123 LE |
204 | if (!adm_ctx->device && (flags & DRBD_ADM_NEED_MINOR)) { |
205 | drbd_msg_put_info(adm_ctx->reply_skb, "unknown minor"); | |
3b98c0c2 LE |
206 | return ERR_MINOR_INVALID; |
207 | } | |
a910b123 LE |
208 | if (!adm_ctx->resource && (flags & DRBD_ADM_NEED_RESOURCE)) { |
209 | drbd_msg_put_info(adm_ctx->reply_skb, "unknown resource"); | |
210 | if (adm_ctx->resource_name) | |
a10f6b8a | 211 | return ERR_RES_NOT_KNOWN; |
3b98c0c2 LE |
212 | return ERR_INVALID_REQUEST; |
213 | } | |
214 | ||
089c075d | 215 | if (flags & DRBD_ADM_NEED_CONNECTION) { |
a910b123 LE |
216 | if (adm_ctx->resource) { |
217 | drbd_msg_put_info(adm_ctx->reply_skb, "no resource name expected"); | |
089c075d AG |
218 | return ERR_INVALID_REQUEST; |
219 | } | |
a910b123 LE |
220 | if (adm_ctx->device) { |
221 | drbd_msg_put_info(adm_ctx->reply_skb, "no minor number expected"); | |
089c075d AG |
222 | return ERR_INVALID_REQUEST; |
223 | } | |
a910b123 LE |
224 | if (adm_ctx->my_addr && adm_ctx->peer_addr) |
225 | adm_ctx->connection = conn_get_by_addrs(nla_data(adm_ctx->my_addr), | |
226 | nla_len(adm_ctx->my_addr), | |
227 | nla_data(adm_ctx->peer_addr), | |
228 | nla_len(adm_ctx->peer_addr)); | |
229 | if (!adm_ctx->connection) { | |
230 | drbd_msg_put_info(adm_ctx->reply_skb, "unknown connection"); | |
089c075d AG |
231 | return ERR_INVALID_REQUEST; |
232 | } | |
233 | } | |
234 | ||
3b98c0c2 | 235 | /* some more paranoia, if the request was over-determined */ |
a910b123 LE |
236 | if (adm_ctx->device && adm_ctx->resource && |
237 | adm_ctx->device->resource != adm_ctx->resource) { | |
4bc76048 | 238 | pr_warning("request: minor=%u, resource=%s; but that minor belongs to resource %s\n", |
a910b123 LE |
239 | adm_ctx->minor, adm_ctx->resource->name, |
240 | adm_ctx->device->resource->name); | |
241 | drbd_msg_put_info(adm_ctx->reply_skb, "minor exists in different resource"); | |
527f4b24 LE |
242 | return ERR_INVALID_REQUEST; |
243 | } | |
a910b123 LE |
244 | if (adm_ctx->device && |
245 | adm_ctx->volume != VOLUME_UNSPECIFIED && | |
246 | adm_ctx->volume != adm_ctx->device->vnr) { | |
3b98c0c2 | 247 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", |
a910b123 LE |
248 | adm_ctx->minor, adm_ctx->volume, |
249 | adm_ctx->device->vnr, | |
250 | adm_ctx->device->resource->name); | |
251 | drbd_msg_put_info(adm_ctx->reply_skb, "minor exists as different volume"); | |
3b98c0c2 LE |
252 | return ERR_INVALID_REQUEST; |
253 | } | |
0ace9dfa | 254 | |
9e276872 LE |
255 | /* still, provide adm_ctx->resource always, if possible. */ |
256 | if (!adm_ctx->resource) { | |
257 | adm_ctx->resource = adm_ctx->device ? adm_ctx->device->resource | |
258 | : adm_ctx->connection ? adm_ctx->connection->resource : NULL; | |
259 | if (adm_ctx->resource) | |
260 | kref_get(&adm_ctx->resource->kref); | |
261 | } | |
262 | ||
3b98c0c2 LE |
263 | return NO_ERROR; |
264 | ||
265 | fail: | |
a910b123 LE |
266 | nlmsg_free(adm_ctx->reply_skb); |
267 | adm_ctx->reply_skb = NULL; | |
1e2a2551 | 268 | return err; |
3b98c0c2 LE |
269 | } |
270 | ||
a910b123 LE |
271 | static int drbd_adm_finish(struct drbd_config_context *adm_ctx, |
272 | struct genl_info *info, int retcode) | |
3b98c0c2 | 273 | { |
9e276872 LE |
274 | if (adm_ctx->device) { |
275 | kref_put(&adm_ctx->device->kref, drbd_destroy_device); | |
276 | adm_ctx->device = NULL; | |
277 | } | |
a910b123 LE |
278 | if (adm_ctx->connection) { |
279 | kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection); | |
280 | adm_ctx->connection = NULL; | |
0ace9dfa | 281 | } |
a910b123 LE |
282 | if (adm_ctx->resource) { |
283 | kref_put(&adm_ctx->resource->kref, drbd_destroy_resource); | |
284 | adm_ctx->resource = NULL; | |
4bc76048 | 285 | } |
0ace9dfa | 286 | |
a910b123 | 287 | if (!adm_ctx->reply_skb) |
3b98c0c2 LE |
288 | return -ENOMEM; |
289 | ||
a910b123 LE |
290 | adm_ctx->reply_dh->ret_code = retcode; |
291 | drbd_adm_send_reply(adm_ctx->reply_skb, info); | |
3b98c0c2 LE |
292 | return 0; |
293 | } | |
b411b363 | 294 | |
bde89a9e | 295 | static void setup_khelper_env(struct drbd_connection *connection, char **envp) |
b411b363 | 296 | { |
6b75dced | 297 | char *afs; |
b411b363 | 298 | |
089c075d | 299 | /* FIXME: A future version will not allow this case. */ |
bde89a9e | 300 | if (connection->my_addr_len == 0 || connection->peer_addr_len == 0) |
089c075d AG |
301 | return; |
302 | ||
bde89a9e | 303 | switch (((struct sockaddr *)&connection->peer_addr)->sa_family) { |
089c075d AG |
304 | case AF_INET6: |
305 | afs = "ipv6"; | |
306 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", | |
bde89a9e | 307 | &((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr); |
b411b363 | 308 | break; |
089c075d AG |
309 | case AF_INET: |
310 | afs = "ipv4"; | |
311 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
bde89a9e | 312 | &((struct sockaddr_in *)&connection->peer_addr)->sin_addr); |
b411b363 | 313 | break; |
089c075d AG |
314 | default: |
315 | afs = "ssocks"; | |
316 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
bde89a9e | 317 | &((struct sockaddr_in *)&connection->peer_addr)->sin_addr); |
b411b363 | 318 | } |
089c075d | 319 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
6b75dced | 320 | } |
b411b363 | 321 | |
b30ab791 | 322 | int drbd_khelper(struct drbd_device *device, char *cmd) |
b411b363 PR |
323 | { |
324 | char *envp[] = { "HOME=/", | |
325 | "TERM=linux", | |
326 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
6b75dced PR |
327 | (char[20]) { }, /* address family */ |
328 | (char[60]) { }, /* address */ | |
b411b363 | 329 | NULL }; |
6b75dced | 330 | char mb[12]; |
b411b363 | 331 | char *argv[] = {usermode_helper, cmd, mb, NULL }; |
a6b32bc3 | 332 | struct drbd_connection *connection = first_peer_device(device)->connection; |
6b75dced | 333 | struct sib_info sib; |
b411b363 PR |
334 | int ret; |
335 | ||
bde89a9e AG |
336 | if (current == connection->worker.task) |
337 | set_bit(CALLBACK_PENDING, &connection->flags); | |
c2ba686f | 338 | |
b30ab791 | 339 | snprintf(mb, 12, "minor-%d", device_to_minor(device)); |
bde89a9e | 340 | setup_khelper_env(connection, envp); |
b411b363 | 341 | |
1090c056 LE |
342 | /* The helper may take some time. |
343 | * write out any unsynced meta data changes now */ | |
b30ab791 | 344 | drbd_md_sync(device); |
1090c056 | 345 | |
d0180171 | 346 | drbd_info(device, "helper command: %s %s %s\n", usermode_helper, cmd, mb); |
3b98c0c2 LE |
347 | sib.sib_reason = SIB_HELPER_PRE; |
348 | sib.helper_name = cmd; | |
b30ab791 | 349 | drbd_bcast_event(device, &sib); |
70834d30 | 350 | ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); |
b411b363 | 351 | if (ret) |
d0180171 | 352 | drbd_warn(device, "helper command: %s %s %s exit code %u (0x%x)\n", |
b411b363 PR |
353 | usermode_helper, cmd, mb, |
354 | (ret >> 8) & 0xff, ret); | |
355 | else | |
d0180171 | 356 | drbd_info(device, "helper command: %s %s %s exit code %u (0x%x)\n", |
b411b363 PR |
357 | usermode_helper, cmd, mb, |
358 | (ret >> 8) & 0xff, ret); | |
3b98c0c2 LE |
359 | sib.sib_reason = SIB_HELPER_POST; |
360 | sib.helper_exit_code = ret; | |
b30ab791 | 361 | drbd_bcast_event(device, &sib); |
b411b363 | 362 | |
bde89a9e AG |
363 | if (current == connection->worker.task) |
364 | clear_bit(CALLBACK_PENDING, &connection->flags); | |
b411b363 PR |
365 | |
366 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
367 | ret = 0; | |
368 | ||
369 | return ret; | |
370 | } | |
371 | ||
bde89a9e | 372 | static int conn_khelper(struct drbd_connection *connection, char *cmd) |
6b75dced PR |
373 | { |
374 | char *envp[] = { "HOME=/", | |
375 | "TERM=linux", | |
376 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
377 | (char[20]) { }, /* address family */ | |
378 | (char[60]) { }, /* address */ | |
379 | NULL }; | |
77c556f6 AG |
380 | char *resource_name = connection->resource->name; |
381 | char *argv[] = {usermode_helper, cmd, resource_name, NULL }; | |
6b75dced PR |
382 | int ret; |
383 | ||
bde89a9e AG |
384 | setup_khelper_env(connection, envp); |
385 | conn_md_sync(connection); | |
6b75dced | 386 | |
1ec861eb | 387 | drbd_info(connection, "helper command: %s %s %s\n", usermode_helper, cmd, resource_name); |
6b75dced PR |
388 | /* TODO: conn_bcast_event() ?? */ |
389 | ||
98683650 | 390 | ret = call_usermodehelper(usermode_helper, argv, envp, UMH_WAIT_PROC); |
6b75dced | 391 | if (ret) |
1ec861eb | 392 | drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n", |
77c556f6 | 393 | usermode_helper, cmd, resource_name, |
6b75dced PR |
394 | (ret >> 8) & 0xff, ret); |
395 | else | |
1ec861eb | 396 | drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n", |
77c556f6 | 397 | usermode_helper, cmd, resource_name, |
6b75dced PR |
398 | (ret >> 8) & 0xff, ret); |
399 | /* TODO: conn_bcast_event() ?? */ | |
c2ba686f | 400 | |
b411b363 PR |
401 | if (ret < 0) /* Ignore any ERRNOs we got. */ |
402 | ret = 0; | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
bde89a9e | 407 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection) |
b411b363 | 408 | { |
cb703454 | 409 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
c06ece6b | 410 | struct drbd_peer_device *peer_device; |
cb703454 PR |
411 | int vnr; |
412 | ||
695d08fa | 413 | rcu_read_lock(); |
c06ece6b AG |
414 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
415 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 416 | if (get_ldev_if_state(device, D_CONSISTENT)) { |
c06ece6b AG |
417 | struct disk_conf *disk_conf = |
418 | rcu_dereference(peer_device->device->ldev->disk_conf); | |
419 | fp = max_t(enum drbd_fencing_p, fp, disk_conf->fencing); | |
b30ab791 | 420 | put_ldev(device); |
cb703454 PR |
421 | } |
422 | } | |
695d08fa | 423 | rcu_read_unlock(); |
cb703454 | 424 | |
d7fe69c6 PR |
425 | if (fp == FP_NOT_AVAIL) { |
426 | /* IO Suspending works on the whole resource. | |
427 | Do it only for one device. */ | |
428 | vnr = 0; | |
429 | peer_device = idr_get_next(&connection->peer_devices, &vnr); | |
430 | drbd_change_state(peer_device->device, CS_VERBOSE | CS_HARD, NS(susp_fen, 0)); | |
431 | } | |
432 | ||
cb703454 PR |
433 | return fp; |
434 | } | |
435 | ||
bde89a9e | 436 | bool conn_try_outdate_peer(struct drbd_connection *connection) |
b411b363 | 437 | { |
28e448bb | 438 | unsigned int connect_cnt; |
cb703454 PR |
439 | union drbd_state mask = { }; |
440 | union drbd_state val = { }; | |
441 | enum drbd_fencing_p fp; | |
b411b363 PR |
442 | char *ex_to_string; |
443 | int r; | |
b411b363 | 444 | |
02df6fe1 | 445 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e | 446 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
1ec861eb | 447 | drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n"); |
02df6fe1 | 448 | spin_unlock_irq(&connection->resource->req_lock); |
cb703454 PR |
449 | return false; |
450 | } | |
b411b363 | 451 | |
bde89a9e | 452 | connect_cnt = connection->connect_cnt; |
0500813f | 453 | spin_unlock_irq(&connection->resource->req_lock); |
28e448bb | 454 | |
bde89a9e | 455 | fp = highest_fencing_policy(connection); |
cb703454 PR |
456 | switch (fp) { |
457 | case FP_NOT_AVAIL: | |
1ec861eb | 458 | drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n"); |
fb22c402 | 459 | goto out; |
cb703454 PR |
460 | case FP_DONT_CARE: |
461 | return true; | |
462 | default: ; | |
b411b363 PR |
463 | } |
464 | ||
bde89a9e | 465 | r = conn_khelper(connection, "fence-peer"); |
b411b363 PR |
466 | |
467 | switch ((r>>8) & 0xff) { | |
468 | case 3: /* peer is inconsistent */ | |
469 | ex_to_string = "peer is inconsistent or worse"; | |
cb703454 PR |
470 | mask.pdsk = D_MASK; |
471 | val.pdsk = D_INCONSISTENT; | |
b411b363 PR |
472 | break; |
473 | case 4: /* peer got outdated, or was already outdated */ | |
474 | ex_to_string = "peer was fenced"; | |
cb703454 PR |
475 | mask.pdsk = D_MASK; |
476 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
477 | break; |
478 | case 5: /* peer was down */ | |
bde89a9e | 479 | if (conn_highest_disk(connection) == D_UP_TO_DATE) { |
b411b363 PR |
480 | /* we will(have) create(d) a new UUID anyways... */ |
481 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
482 | mask.pdsk = D_MASK; |
483 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
484 | } else { |
485 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
486 | } |
487 | break; | |
488 | case 6: /* Peer is primary, voluntarily outdate myself. | |
489 | * This is useful when an unconnected R_SECONDARY is asked to | |
490 | * become R_PRIMARY, but finds the other peer being active. */ | |
491 | ex_to_string = "peer is active"; | |
1ec861eb | 492 | drbd_warn(connection, "Peer is primary, outdating myself.\n"); |
cb703454 PR |
493 | mask.disk = D_MASK; |
494 | val.disk = D_OUTDATED; | |
b411b363 PR |
495 | break; |
496 | case 7: | |
497 | if (fp != FP_STONITH) | |
1ec861eb | 498 | drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 499 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
500 | mask.pdsk = D_MASK; |
501 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
502 | break; |
503 | default: | |
504 | /* The script is broken ... */ | |
1ec861eb | 505 | drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
cb703454 | 506 | return false; /* Eventually leave IO frozen */ |
b411b363 PR |
507 | } |
508 | ||
1ec861eb | 509 | drbd_info(connection, "fence-peer helper returned %d (%s)\n", |
cb703454 | 510 | (r>>8) & 0xff, ex_to_string); |
fb22c402 | 511 | |
cb703454 | 512 | out: |
fb22c402 | 513 | |
cb703454 | 514 | /* Not using |
bde89a9e | 515 | conn_request_state(connection, mask, val, CS_VERBOSE); |
cb703454 PR |
516 | here, because we might were able to re-establish the connection in the |
517 | meantime. */ | |
0500813f | 518 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e AG |
519 | if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) { |
520 | if (connection->connect_cnt != connect_cnt) | |
28e448bb PR |
521 | /* In case the connection was established and droped |
522 | while the fence-peer handler was running, ignore it */ | |
1ec861eb | 523 | drbd_info(connection, "Ignoring fence-peer exit code\n"); |
28e448bb | 524 | else |
bde89a9e | 525 | _conn_request_state(connection, mask, val, CS_VERBOSE); |
28e448bb | 526 | } |
0500813f | 527 | spin_unlock_irq(&connection->resource->req_lock); |
cb703454 | 528 | |
bde89a9e | 529 | return conn_highest_pdsk(connection) <= D_OUTDATED; |
b411b363 PR |
530 | } |
531 | ||
87f7be4c PR |
532 | static int _try_outdate_peer_async(void *data) |
533 | { | |
bde89a9e | 534 | struct drbd_connection *connection = (struct drbd_connection *)data; |
87f7be4c | 535 | |
bde89a9e | 536 | conn_try_outdate_peer(connection); |
87f7be4c | 537 | |
05a10ec7 | 538 | kref_put(&connection->kref, drbd_destroy_connection); |
87f7be4c PR |
539 | return 0; |
540 | } | |
541 | ||
bde89a9e | 542 | void conn_try_outdate_peer_async(struct drbd_connection *connection) |
87f7be4c PR |
543 | { |
544 | struct task_struct *opa; | |
545 | ||
bde89a9e AG |
546 | kref_get(&connection->kref); |
547 | opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h"); | |
9dc9fbb3 | 548 | if (IS_ERR(opa)) { |
1ec861eb | 549 | drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n"); |
05a10ec7 | 550 | kref_put(&connection->kref, drbd_destroy_connection); |
9dc9fbb3 | 551 | } |
87f7be4c | 552 | } |
b411b363 | 553 | |
bf885f8a | 554 | enum drbd_state_rv |
44a4d551 | 555 | drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int force) |
b411b363 | 556 | { |
44a4d551 LE |
557 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
558 | struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL; | |
b411b363 | 559 | const int max_tries = 4; |
bf885f8a | 560 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 561 | struct net_conf *nc; |
b411b363 PR |
562 | int try = 0; |
563 | int forced = 0; | |
564 | union drbd_state mask, val; | |
b411b363 | 565 | |
b6f85ef9 AG |
566 | if (new_role == R_PRIMARY) { |
567 | struct drbd_connection *connection; | |
568 | ||
569 | /* Detect dead peers as soon as possible. */ | |
570 | ||
571 | rcu_read_lock(); | |
572 | for_each_connection(connection, device->resource) | |
573 | request_ping(connection); | |
574 | rcu_read_unlock(); | |
575 | } | |
b411b363 | 576 | |
b30ab791 | 577 | mutex_lock(device->state_mutex); |
b411b363 PR |
578 | |
579 | mask.i = 0; mask.role = R_MASK; | |
580 | val.i = 0; val.role = new_role; | |
581 | ||
582 | while (try++ < max_tries) { | |
b30ab791 | 583 | rv = _drbd_request_state(device, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
584 | |
585 | /* in case we first succeeded to outdate, | |
586 | * but now suddenly could establish a connection */ | |
bf885f8a | 587 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
588 | val.pdsk = 0; |
589 | mask.pdsk = 0; | |
590 | continue; | |
591 | } | |
592 | ||
bf885f8a | 593 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
b30ab791 AG |
594 | (device->state.disk < D_UP_TO_DATE && |
595 | device->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
596 | mask.disk = D_MASK; |
597 | val.disk = D_UP_TO_DATE; | |
598 | forced = 1; | |
599 | continue; | |
600 | } | |
601 | ||
bf885f8a | 602 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b30ab791 | 603 | device->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
0b0ba1ef | 604 | D_ASSERT(device, device->state.pdsk == D_UNKNOWN); |
b411b363 | 605 | |
44a4d551 | 606 | if (conn_try_outdate_peer(connection)) { |
b411b363 PR |
607 | val.disk = D_UP_TO_DATE; |
608 | mask.disk = D_MASK; | |
609 | } | |
b411b363 PR |
610 | continue; |
611 | } | |
612 | ||
bf885f8a | 613 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 614 | goto out; |
bf885f8a | 615 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
44a4d551 | 616 | if (!conn_try_outdate_peer(connection) && force) { |
d0180171 | 617 | drbd_warn(device, "Forced into split brain situation!\n"); |
cb703454 PR |
618 | mask.pdsk = D_MASK; |
619 | val.pdsk = D_OUTDATED; | |
b411b363 | 620 | |
cb703454 | 621 | } |
b411b363 PR |
622 | continue; |
623 | } | |
bf885f8a | 624 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
625 | /* Maybe the peer is detected as dead very soon... |
626 | retry at most once more in this case. */ | |
44ed167d PR |
627 | int timeo; |
628 | rcu_read_lock(); | |
44a4d551 | 629 | nc = rcu_dereference(connection->net_conf); |
44ed167d PR |
630 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; |
631 | rcu_read_unlock(); | |
632 | schedule_timeout_interruptible(timeo); | |
b411b363 PR |
633 | if (try < max_tries) |
634 | try = max_tries - 1; | |
635 | continue; | |
636 | } | |
bf885f8a | 637 | if (rv < SS_SUCCESS) { |
b30ab791 | 638 | rv = _drbd_request_state(device, mask, val, |
b411b363 | 639 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 640 | if (rv < SS_SUCCESS) |
3b98c0c2 | 641 | goto out; |
b411b363 PR |
642 | } |
643 | break; | |
644 | } | |
645 | ||
bf885f8a | 646 | if (rv < SS_SUCCESS) |
3b98c0c2 | 647 | goto out; |
b411b363 PR |
648 | |
649 | if (forced) | |
d0180171 | 650 | drbd_warn(device, "Forced to consider local data as UpToDate!\n"); |
b411b363 PR |
651 | |
652 | /* Wait until nothing is on the fly :) */ | |
b30ab791 | 653 | wait_event(device->misc_wait, atomic_read(&device->ap_pending_cnt) == 0); |
b411b363 | 654 | |
b6dd1a89 LE |
655 | /* FIXME also wait for all pending P_BARRIER_ACK? */ |
656 | ||
b411b363 | 657 | if (new_role == R_SECONDARY) { |
b30ab791 AG |
658 | set_disk_ro(device->vdisk, true); |
659 | if (get_ldev(device)) { | |
660 | device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
661 | put_ldev(device); | |
b411b363 PR |
662 | } |
663 | } else { | |
9e276872 LE |
664 | /* Called from drbd_adm_set_role only. |
665 | * We are still holding the conf_update mutex. */ | |
44a4d551 | 666 | nc = connection->net_conf; |
44ed167d | 667 | if (nc) |
6139f60d | 668 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
91fd4dad | 669 | |
b30ab791 AG |
670 | set_disk_ro(device->vdisk, false); |
671 | if (get_ldev(device)) { | |
672 | if (((device->state.conn < C_CONNECTED || | |
673 | device->state.pdsk <= D_FAILED) | |
674 | && device->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
675 | drbd_uuid_new_current(device); | |
b411b363 | 676 | |
b30ab791 AG |
677 | device->ldev->md.uuid[UI_CURRENT] |= (u64)1; |
678 | put_ldev(device); | |
b411b363 PR |
679 | } |
680 | } | |
681 | ||
19f843aa LE |
682 | /* writeout of activity log covered areas of the bitmap |
683 | * to stable storage done in after state change already */ | |
b411b363 | 684 | |
b30ab791 | 685 | if (device->state.conn >= C_WF_REPORT_PARAMS) { |
b411b363 PR |
686 | /* if this was forced, we should consider sync */ |
687 | if (forced) | |
44a4d551 LE |
688 | drbd_send_uuids(peer_device); |
689 | drbd_send_current_state(peer_device); | |
b411b363 PR |
690 | } |
691 | ||
b30ab791 | 692 | drbd_md_sync(device); |
b411b363 | 693 | |
b30ab791 | 694 | kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE); |
3b98c0c2 | 695 | out: |
b30ab791 | 696 | mutex_unlock(device->state_mutex); |
bf885f8a | 697 | return rv; |
b411b363 PR |
698 | } |
699 | ||
3b98c0c2 | 700 | static const char *from_attrs_err_to_txt(int err) |
ef50a3e3 | 701 | { |
3b98c0c2 LE |
702 | return err == -ENOMSG ? "required attribute missing" : |
703 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 704 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 705 | "invalid attribute value"; |
ef50a3e3 | 706 | } |
b411b363 | 707 | |
3b98c0c2 | 708 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 709 | { |
a910b123 | 710 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
711 | struct set_role_parms parms; |
712 | int err; | |
713 | enum drbd_ret_code retcode; | |
b411b363 | 714 | |
a910b123 | 715 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
716 | if (!adm_ctx.reply_skb) |
717 | return retcode; | |
718 | if (retcode != NO_ERROR) | |
719 | goto out; | |
b411b363 | 720 | |
3b98c0c2 LE |
721 | memset(&parms, 0, sizeof(parms)); |
722 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 723 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
724 | if (err) { |
725 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 726 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
727 | goto out; |
728 | } | |
729 | } | |
9e276872 LE |
730 | genl_unlock(); |
731 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 732 | |
3b98c0c2 | 733 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) |
b30ab791 | 734 | retcode = drbd_set_role(adm_ctx.device, R_PRIMARY, parms.assume_uptodate); |
3b98c0c2 | 735 | else |
b30ab791 | 736 | retcode = drbd_set_role(adm_ctx.device, R_SECONDARY, 0); |
9e276872 LE |
737 | |
738 | mutex_unlock(&adm_ctx.resource->adm_mutex); | |
739 | genl_lock(); | |
3b98c0c2 | 740 | out: |
a910b123 | 741 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
742 | return 0; |
743 | } | |
744 | ||
ae8bf312 LE |
745 | /* Initializes the md.*_offset members, so we are able to find |
746 | * the on disk meta data. | |
747 | * | |
748 | * We currently have two possible layouts: | |
749 | * external: | |
750 | * |----------- md_size_sect ------------------| | |
751 | * [ 4k superblock ][ activity log ][ Bitmap ] | |
752 | * | al_offset == 8 | | |
753 | * | bm_offset = al_offset + X | | |
754 | * ==> bitmap sectors = md_size_sect - bm_offset | |
755 | * | |
756 | * internal: | |
757 | * |----------- md_size_sect ------------------| | |
758 | * [data.....][ Bitmap ][ activity log ][ 4k superblock ] | |
759 | * | al_offset < 0 | | |
760 | * | bm_offset = al_offset - Y | | |
761 | * ==> bitmap sectors = Y = al_offset - bm_offset | |
762 | * | |
763 | * Activity log size used to be fixed 32kB, | |
764 | * but is about to become configurable. | |
765 | */ | |
b30ab791 | 766 | static void drbd_md_set_sector_offsets(struct drbd_device *device, |
b411b363 PR |
767 | struct drbd_backing_dev *bdev) |
768 | { | |
769 | sector_t md_size_sect = 0; | |
c04ccaa6 | 770 | unsigned int al_size_sect = bdev->md.al_size_4k * 8; |
daeda1cc | 771 | |
3a4d4eb3 LE |
772 | bdev->md.md_offset = drbd_md_ss(bdev); |
773 | ||
68e41a43 | 774 | switch (bdev->md.meta_dev_idx) { |
b411b363 PR |
775 | default: |
776 | /* v07 style fixed size indexed meta data */ | |
ae8bf312 | 777 | bdev->md.md_size_sect = MD_128MB_SECT; |
ae8bf312 LE |
778 | bdev->md.al_offset = MD_4kB_SECT; |
779 | bdev->md.bm_offset = MD_4kB_SECT + al_size_sect; | |
b411b363 PR |
780 | break; |
781 | case DRBD_MD_INDEX_FLEX_EXT: | |
782 | /* just occupy the full device; unit: sectors */ | |
783 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
ae8bf312 LE |
784 | bdev->md.al_offset = MD_4kB_SECT; |
785 | bdev->md.bm_offset = MD_4kB_SECT + al_size_sect; | |
b411b363 PR |
786 | break; |
787 | case DRBD_MD_INDEX_INTERNAL: | |
788 | case DRBD_MD_INDEX_FLEX_INT: | |
b411b363 | 789 | /* al size is still fixed */ |
ae8bf312 | 790 | bdev->md.al_offset = -al_size_sect; |
b411b363 PR |
791 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
792 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
793 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
794 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
795 | md_size_sect = ALIGN(md_size_sect, 8); | |
796 | ||
797 | /* plus the "drbd meta data super block", | |
798 | * and the activity log; */ | |
ae8bf312 | 799 | md_size_sect += MD_4kB_SECT + al_size_sect; |
b411b363 PR |
800 | |
801 | bdev->md.md_size_sect = md_size_sect; | |
802 | /* bitmap offset is adjusted by 'super' block size */ | |
ae8bf312 | 803 | bdev->md.bm_offset = -md_size_sect + MD_4kB_SECT; |
b411b363 PR |
804 | break; |
805 | } | |
806 | } | |
807 | ||
4b0715f0 | 808 | /* input size is expected to be in KB */ |
b411b363 PR |
809 | char *ppsize(char *buf, unsigned long long size) |
810 | { | |
4b0715f0 LE |
811 | /* Needs 9 bytes at max including trailing NUL: |
812 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
813 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
814 | int base = 0; | |
4b0715f0 | 815 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
816 | /* shift + round */ |
817 | size = (size >> 10) + !!(size & (1<<9)); | |
818 | base++; | |
819 | } | |
4b0715f0 | 820 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
821 | |
822 | return buf; | |
823 | } | |
824 | ||
825 | /* there is still a theoretical deadlock when called from receiver | |
826 | * on an D_INCONSISTENT R_PRIMARY: | |
827 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
828 | * packet from remote to dec_ap_bio again. | |
829 | * receiver receive_sizes(), comes here, | |
830 | * waits for ap_bio_cnt == 0. -> deadlock. | |
831 | * but this cannot happen, actually, because: | |
832 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
833 | * (not connected, or bad/no disk on peer): | |
834 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
835 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
836 | * peer may not initiate a resize. | |
837 | */ | |
3b98c0c2 LE |
838 | /* Note these are not to be confused with |
839 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
840 | * which are (sub) state changes triggered by admin (drbdsetup), | |
841 | * and can be long lived. | |
b30ab791 | 842 | * This changes an device->flag, is triggered by drbd internals, |
3b98c0c2 | 843 | * and should be short-lived. */ |
b30ab791 | 844 | void drbd_suspend_io(struct drbd_device *device) |
b411b363 | 845 | { |
b30ab791 AG |
846 | set_bit(SUSPEND_IO, &device->flags); |
847 | if (drbd_suspended(device)) | |
265be2d0 | 848 | return; |
b30ab791 | 849 | wait_event(device->misc_wait, !atomic_read(&device->ap_bio_cnt)); |
b411b363 PR |
850 | } |
851 | ||
b30ab791 | 852 | void drbd_resume_io(struct drbd_device *device) |
b411b363 | 853 | { |
b30ab791 AG |
854 | clear_bit(SUSPEND_IO, &device->flags); |
855 | wake_up(&device->misc_wait); | |
b411b363 PR |
856 | } |
857 | ||
858 | /** | |
859 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
b30ab791 | 860 | * @device: DRBD device. |
b411b363 PR |
861 | * |
862 | * Returns 0 on success, negative return values indicate errors. | |
863 | * You should call drbd_md_sync() after calling this function. | |
864 | */ | |
d752b269 | 865 | enum determine_dev_size |
b30ab791 | 866 | drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct resize_parms *rs) __must_hold(local) |
b411b363 PR |
867 | { |
868 | sector_t prev_first_sect, prev_size; /* previous meta location */ | |
cccac985 | 869 | sector_t la_size_sect, u_size; |
b30ab791 | 870 | struct drbd_md *md = &device->ldev->md; |
d752b269 PR |
871 | u32 prev_al_stripe_size_4k; |
872 | u32 prev_al_stripes; | |
b411b363 PR |
873 | sector_t size; |
874 | char ppb[10]; | |
d752b269 | 875 | void *buffer; |
b411b363 PR |
876 | |
877 | int md_moved, la_size_changed; | |
e96c9633 | 878 | enum determine_dev_size rv = DS_UNCHANGED; |
b411b363 PR |
879 | |
880 | /* race: | |
881 | * application request passes inc_ap_bio, | |
882 | * but then cannot get an AL-reference. | |
883 | * this function later may wait on ap_bio_cnt == 0. -> deadlock. | |
884 | * | |
885 | * to avoid that: | |
886 | * Suspend IO right here. | |
887 | * still lock the act_log to not trigger ASSERTs there. | |
888 | */ | |
b30ab791 AG |
889 | drbd_suspend_io(device); |
890 | buffer = drbd_md_get_buffer(device); /* Lock meta-data IO */ | |
d752b269 | 891 | if (!buffer) { |
b30ab791 | 892 | drbd_resume_io(device); |
d752b269 PR |
893 | return DS_ERROR; |
894 | } | |
b411b363 PR |
895 | |
896 | /* no wait necessary anymore, actually we could assert that */ | |
b30ab791 | 897 | wait_event(device->al_wait, lc_try_lock(device->act_log)); |
b411b363 | 898 | |
b30ab791 AG |
899 | prev_first_sect = drbd_md_first_sector(device->ldev); |
900 | prev_size = device->ldev->md.md_size_sect; | |
901 | la_size_sect = device->ldev->md.la_size_sect; | |
b411b363 | 902 | |
d752b269 PR |
903 | if (rs) { |
904 | /* rs is non NULL if we should change the AL layout only */ | |
905 | ||
906 | prev_al_stripes = md->al_stripes; | |
907 | prev_al_stripe_size_4k = md->al_stripe_size_4k; | |
908 | ||
909 | md->al_stripes = rs->al_stripes; | |
910 | md->al_stripe_size_4k = rs->al_stripe_size / 4; | |
911 | md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4; | |
912 | } | |
913 | ||
b30ab791 | 914 | drbd_md_set_sector_offsets(device, device->ldev); |
b411b363 | 915 | |
daeda1cc | 916 | rcu_read_lock(); |
b30ab791 | 917 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
daeda1cc | 918 | rcu_read_unlock(); |
b30ab791 | 919 | size = drbd_new_dev_size(device, device->ldev, u_size, flags & DDSF_FORCED); |
b411b363 | 920 | |
d752b269 PR |
921 | if (size < la_size_sect) { |
922 | if (rs && u_size == 0) { | |
923 | /* Remove "rs &&" later. This check should always be active, but | |
924 | right now the receiver expects the permissive behavior */ | |
d0180171 | 925 | drbd_warn(device, "Implicit shrink not allowed. " |
d752b269 PR |
926 | "Use --size=%llus for explicit shrink.\n", |
927 | (unsigned long long)size); | |
928 | rv = DS_ERROR_SHRINK; | |
929 | } | |
930 | if (u_size > size) | |
931 | rv = DS_ERROR_SPACE_MD; | |
932 | if (rv != DS_UNCHANGED) | |
933 | goto err_out; | |
934 | } | |
935 | ||
b30ab791 AG |
936 | if (drbd_get_capacity(device->this_bdev) != size || |
937 | drbd_bm_capacity(device) != size) { | |
b411b363 | 938 | int err; |
b30ab791 | 939 | err = drbd_bm_resize(device, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
940 | if (unlikely(err)) { |
941 | /* currently there is only one error: ENOMEM! */ | |
b30ab791 | 942 | size = drbd_bm_capacity(device)>>1; |
b411b363 | 943 | if (size == 0) { |
d0180171 | 944 | drbd_err(device, "OUT OF MEMORY! " |
b411b363 PR |
945 | "Could not allocate bitmap!\n"); |
946 | } else { | |
d0180171 | 947 | drbd_err(device, "BM resizing failed. " |
b411b363 PR |
948 | "Leaving size unchanged at size = %lu KB\n", |
949 | (unsigned long)size); | |
950 | } | |
e96c9633 | 951 | rv = DS_ERROR; |
b411b363 PR |
952 | } |
953 | /* racy, see comments above. */ | |
b30ab791 AG |
954 | drbd_set_my_capacity(device, size); |
955 | device->ldev->md.la_size_sect = size; | |
d0180171 | 956 | drbd_info(device, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), |
b411b363 PR |
957 | (unsigned long long)size>>1); |
958 | } | |
d752b269 PR |
959 | if (rv <= DS_ERROR) |
960 | goto err_out; | |
b411b363 | 961 | |
b30ab791 | 962 | la_size_changed = (la_size_sect != device->ldev->md.la_size_sect); |
b411b363 | 963 | |
b30ab791 AG |
964 | md_moved = prev_first_sect != drbd_md_first_sector(device->ldev) |
965 | || prev_size != device->ldev->md.md_size_sect; | |
b411b363 | 966 | |
d752b269 PR |
967 | if (la_size_changed || md_moved || rs) { |
968 | u32 prev_flags; | |
24dccabb | 969 | |
b30ab791 | 970 | drbd_al_shrink(device); /* All extents inactive. */ |
d752b269 PR |
971 | |
972 | prev_flags = md->flags; | |
973 | md->flags &= ~MDF_PRIMARY_IND; | |
b30ab791 | 974 | drbd_md_write(device, buffer); |
d752b269 | 975 | |
d0180171 | 976 | drbd_info(device, "Writing the whole bitmap, %s\n", |
b411b363 PR |
977 | la_size_changed && md_moved ? "size changed and md moved" : |
978 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 | 979 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
b30ab791 | 980 | drbd_bitmap_io(device, md_moved ? &drbd_bm_write_all : &drbd_bm_write, |
d752b269 | 981 | "size changed", BM_LOCKED_MASK); |
b30ab791 | 982 | drbd_initialize_al(device, buffer); |
d752b269 PR |
983 | |
984 | md->flags = prev_flags; | |
b30ab791 | 985 | drbd_md_write(device, buffer); |
d752b269 PR |
986 | |
987 | if (rs) | |
d0180171 AG |
988 | drbd_info(device, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n", |
989 | md->al_stripes, md->al_stripe_size_4k * 4); | |
b411b363 PR |
990 | } |
991 | ||
cccac985 | 992 | if (size > la_size_sect) |
57737adc | 993 | rv = la_size_sect ? DS_GREW : DS_GREW_FROM_ZERO; |
cccac985 | 994 | if (size < la_size_sect) |
e96c9633 | 995 | rv = DS_SHRUNK; |
d752b269 PR |
996 | |
997 | if (0) { | |
998 | err_out: | |
999 | if (rs) { | |
1000 | md->al_stripes = prev_al_stripes; | |
1001 | md->al_stripe_size_4k = prev_al_stripe_size_4k; | |
1002 | md->al_size_4k = (u64)prev_al_stripes * prev_al_stripe_size_4k; | |
1003 | ||
b30ab791 | 1004 | drbd_md_set_sector_offsets(device, device->ldev); |
d752b269 PR |
1005 | } |
1006 | } | |
b30ab791 AG |
1007 | lc_unlock(device->act_log); |
1008 | wake_up(&device->al_wait); | |
1009 | drbd_md_put_buffer(device); | |
1010 | drbd_resume_io(device); | |
b411b363 PR |
1011 | |
1012 | return rv; | |
1013 | } | |
1014 | ||
1015 | sector_t | |
b30ab791 | 1016 | drbd_new_dev_size(struct drbd_device *device, struct drbd_backing_dev *bdev, |
ef5e44a6 | 1017 | sector_t u_size, int assume_peer_has_space) |
b411b363 | 1018 | { |
b30ab791 | 1019 | sector_t p_size = device->p_size; /* partner's disk size. */ |
cccac985 | 1020 | sector_t la_size_sect = bdev->md.la_size_sect; /* last agreed size. */ |
b411b363 | 1021 | sector_t m_size; /* my size */ |
b411b363 PR |
1022 | sector_t size = 0; |
1023 | ||
1024 | m_size = drbd_get_max_capacity(bdev); | |
1025 | ||
b30ab791 | 1026 | if (device->state.conn < C_CONNECTED && assume_peer_has_space) { |
d0180171 | 1027 | drbd_warn(device, "Resize while not connected was forced by the user!\n"); |
a393db6f PR |
1028 | p_size = m_size; |
1029 | } | |
1030 | ||
b411b363 PR |
1031 | if (p_size && m_size) { |
1032 | size = min_t(sector_t, p_size, m_size); | |
1033 | } else { | |
cccac985 LE |
1034 | if (la_size_sect) { |
1035 | size = la_size_sect; | |
b411b363 PR |
1036 | if (m_size && m_size < size) |
1037 | size = m_size; | |
1038 | if (p_size && p_size < size) | |
1039 | size = p_size; | |
1040 | } else { | |
1041 | if (m_size) | |
1042 | size = m_size; | |
1043 | if (p_size) | |
1044 | size = p_size; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | if (size == 0) | |
d0180171 | 1049 | drbd_err(device, "Both nodes diskless!\n"); |
b411b363 PR |
1050 | |
1051 | if (u_size) { | |
1052 | if (u_size > size) | |
d0180171 | 1053 | drbd_err(device, "Requested disk size is too big (%lu > %lu)\n", |
b411b363 PR |
1054 | (unsigned long)u_size>>1, (unsigned long)size>>1); |
1055 | else | |
1056 | size = u_size; | |
1057 | } | |
1058 | ||
1059 | return size; | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
b30ab791 | 1064 | * @device: DRBD device. |
b411b363 PR |
1065 | * |
1066 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
1067 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
1068 | * this function. | |
1069 | */ | |
b30ab791 | 1070 | static int drbd_check_al_size(struct drbd_device *device, struct disk_conf *dc) |
b411b363 PR |
1071 | { |
1072 | struct lru_cache *n, *t; | |
1073 | struct lc_element *e; | |
1074 | unsigned int in_use; | |
1075 | int i; | |
1076 | ||
b30ab791 AG |
1077 | if (device->act_log && |
1078 | device->act_log->nr_elements == dc->al_extents) | |
b411b363 PR |
1079 | return 0; |
1080 | ||
1081 | in_use = 0; | |
b30ab791 | 1082 | t = device->act_log; |
7ad651b5 | 1083 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 1084 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
1085 | |
1086 | if (n == NULL) { | |
d0180171 | 1087 | drbd_err(device, "Cannot allocate act_log lru!\n"); |
b411b363 PR |
1088 | return -ENOMEM; |
1089 | } | |
b30ab791 | 1090 | spin_lock_irq(&device->al_lock); |
b411b363 PR |
1091 | if (t) { |
1092 | for (i = 0; i < t->nr_elements; i++) { | |
1093 | e = lc_element_by_index(t, i); | |
1094 | if (e->refcnt) | |
d0180171 | 1095 | drbd_err(device, "refcnt(%d)==%d\n", |
b411b363 PR |
1096 | e->lc_number, e->refcnt); |
1097 | in_use += e->refcnt; | |
1098 | } | |
1099 | } | |
1100 | if (!in_use) | |
b30ab791 AG |
1101 | device->act_log = n; |
1102 | spin_unlock_irq(&device->al_lock); | |
b411b363 | 1103 | if (in_use) { |
d0180171 | 1104 | drbd_err(device, "Activity log still in use!\n"); |
b411b363 PR |
1105 | lc_destroy(n); |
1106 | return -EBUSY; | |
1107 | } else { | |
1108 | if (t) | |
1109 | lc_destroy(t); | |
1110 | } | |
b30ab791 | 1111 | drbd_md_mark_dirty(device); /* we changed device->act_log->nr_elemens */ |
b411b363 PR |
1112 | return 0; |
1113 | } | |
1114 | ||
8fe39aac PR |
1115 | static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backing_dev *bdev, |
1116 | unsigned int max_bio_size) | |
b411b363 | 1117 | { |
b30ab791 | 1118 | struct request_queue * const q = device->rq_queue; |
db141b2f LE |
1119 | unsigned int max_hw_sectors = max_bio_size >> 9; |
1120 | unsigned int max_segments = 0; | |
c1b3156f | 1121 | struct request_queue *b = NULL; |
99432fcc | 1122 | |
8fe39aac PR |
1123 | if (bdev) { |
1124 | b = bdev->backing_bdev->bd_disk->queue; | |
99432fcc PR |
1125 | |
1126 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc | 1127 | rcu_read_lock(); |
b30ab791 | 1128 | max_segments = rcu_dereference(device->ldev->disk_conf)->max_bio_bvecs; |
daeda1cc | 1129 | rcu_read_unlock(); |
c1b3156f PR |
1130 | |
1131 | blk_set_stacking_limits(&q->limits); | |
1132 | blk_queue_max_write_same_sectors(q, 0); | |
99432fcc | 1133 | } |
b411b363 | 1134 | |
b411b363 | 1135 | blk_queue_logical_block_size(q, 512); |
1816a2b4 LE |
1136 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1137 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1138 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
1139 | blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1); | |
b411b363 | 1140 | |
c1b3156f | 1141 | if (b) { |
20c68fde LE |
1142 | struct drbd_connection *connection = first_peer_device(device)->connection; |
1143 | ||
1144 | if (blk_queue_discard(b) && | |
1145 | (connection->cstate < C_CONNECTED || connection->agreed_features & FF_TRIM)) { | |
20c68fde LE |
1146 | /* For now, don't allow more than one activity log extent worth of data |
1147 | * to be discarded in one go. We may need to rework drbd_al_begin_io() | |
1148 | * to allow for even larger discard ranges */ | |
1149 | q->limits.max_discard_sectors = DRBD_MAX_DISCARD_SECTORS; | |
1150 | ||
1151 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
1152 | /* REALLY? Is stacking secdiscard "legal"? */ | |
1153 | if (blk_queue_secdiscard(b)) | |
1154 | queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q); | |
1155 | } else { | |
1156 | q->limits.max_discard_sectors = 0; | |
1157 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
1158 | queue_flag_clear_unlocked(QUEUE_FLAG_SECDISCARD, q); | |
1159 | } | |
99432fcc PR |
1160 | |
1161 | blk_queue_stack_limits(q, b); | |
1162 | ||
1163 | if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) { | |
d0180171 | 1164 | drbd_info(device, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", |
99432fcc PR |
1165 | q->backing_dev_info.ra_pages, |
1166 | b->backing_dev_info.ra_pages); | |
1167 | q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages; | |
1168 | } | |
99432fcc PR |
1169 | } |
1170 | } | |
1171 | ||
8fe39aac | 1172 | void drbd_reconsider_max_bio_size(struct drbd_device *device, struct drbd_backing_dev *bdev) |
99432fcc | 1173 | { |
db141b2f | 1174 | unsigned int now, new, local, peer; |
99432fcc | 1175 | |
b30ab791 AG |
1176 | now = queue_max_hw_sectors(device->rq_queue) << 9; |
1177 | local = device->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1178 | peer = device->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1179 | |
8fe39aac PR |
1180 | if (bdev) { |
1181 | local = queue_max_hw_sectors(bdev->backing_bdev->bd_disk->queue) << 9; | |
b30ab791 | 1182 | device->local_max_bio_size = local; |
b411b363 | 1183 | } |
db141b2f | 1184 | local = min(local, DRBD_MAX_BIO_SIZE); |
99432fcc PR |
1185 | |
1186 | /* We may ignore peer limits if the peer is modern enough. | |
1187 | Because new from 8.3.8 onwards the peer can use multiple | |
1188 | BIOs for a single peer_request */ | |
b30ab791 | 1189 | if (device->state.conn >= C_WF_REPORT_PARAMS) { |
a6b32bc3 | 1190 | if (first_peer_device(device)->connection->agreed_pro_version < 94) |
b30ab791 | 1191 | peer = min(device->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET); |
6809384c | 1192 | /* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */ |
a6b32bc3 | 1193 | else if (first_peer_device(device)->connection->agreed_pro_version == 94) |
99432fcc | 1194 | peer = DRBD_MAX_SIZE_H80_PACKET; |
a6b32bc3 | 1195 | else if (first_peer_device(device)->connection->agreed_pro_version < 100) |
2ffca4f3 PR |
1196 | peer = DRBD_MAX_BIO_SIZE_P95; /* drbd 8.3.8 onwards, before 8.4.0 */ |
1197 | else | |
99432fcc | 1198 | peer = DRBD_MAX_BIO_SIZE; |
99432fcc | 1199 | |
fa090e70 LE |
1200 | /* We may later detach and re-attach on a disconnected Primary. |
1201 | * Avoid this setting to jump back in that case. | |
1202 | * We want to store what we know the peer DRBD can handle, | |
1203 | * not what the peer IO backend can handle. */ | |
1204 | if (peer > device->peer_max_bio_size) | |
1205 | device->peer_max_bio_size = peer; | |
1206 | } | |
db141b2f | 1207 | new = min(local, peer); |
99432fcc | 1208 | |
b30ab791 | 1209 | if (device->state.role == R_PRIMARY && new < now) |
d0180171 | 1210 | drbd_err(device, "ASSERT FAILED new < now; (%u < %u)\n", new, now); |
99432fcc PR |
1211 | |
1212 | if (new != now) | |
d0180171 | 1213 | drbd_info(device, "max BIO size = %u\n", new); |
99432fcc | 1214 | |
8fe39aac | 1215 | drbd_setup_queue_param(device, bdev, new); |
b411b363 PR |
1216 | } |
1217 | ||
a18e9d1e | 1218 | /* Starts the worker thread */ |
bde89a9e | 1219 | static void conn_reconfig_start(struct drbd_connection *connection) |
b411b363 | 1220 | { |
bde89a9e | 1221 | drbd_thread_start(&connection->worker); |
b5043c5e | 1222 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 PR |
1223 | } |
1224 | ||
a18e9d1e | 1225 | /* if still unconfigured, stops worker again. */ |
bde89a9e | 1226 | static void conn_reconfig_done(struct drbd_connection *connection) |
b411b363 | 1227 | { |
992d6e91 | 1228 | bool stop_threads; |
0500813f | 1229 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e AG |
1230 | stop_threads = conn_all_vols_unconf(connection) && |
1231 | connection->cstate == C_STANDALONE; | |
0500813f | 1232 | spin_unlock_irq(&connection->resource->req_lock); |
992d6e91 LE |
1233 | if (stop_threads) { |
1234 | /* asender is implicitly stopped by receiver | |
81fa2e67 | 1235 | * in conn_disconnect() */ |
bde89a9e AG |
1236 | drbd_thread_stop(&connection->receiver); |
1237 | drbd_thread_stop(&connection->worker); | |
992d6e91 | 1238 | } |
b411b363 PR |
1239 | } |
1240 | ||
0778286a | 1241 | /* Make sure IO is suspended before calling this function(). */ |
b30ab791 | 1242 | static void drbd_suspend_al(struct drbd_device *device) |
0778286a PR |
1243 | { |
1244 | int s = 0; | |
1245 | ||
b30ab791 | 1246 | if (!lc_try_lock(device->act_log)) { |
d0180171 | 1247 | drbd_warn(device, "Failed to lock al in drbd_suspend_al()\n"); |
0778286a PR |
1248 | return; |
1249 | } | |
1250 | ||
b30ab791 | 1251 | drbd_al_shrink(device); |
0500813f | 1252 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 AG |
1253 | if (device->state.conn < C_CONNECTED) |
1254 | s = !test_and_set_bit(AL_SUSPENDED, &device->flags); | |
0500813f | 1255 | spin_unlock_irq(&device->resource->req_lock); |
b30ab791 | 1256 | lc_unlock(device->act_log); |
0778286a PR |
1257 | |
1258 | if (s) | |
d0180171 | 1259 | drbd_info(device, "Suspended AL updates\n"); |
0778286a PR |
1260 | } |
1261 | ||
5979e361 LE |
1262 | |
1263 | static bool should_set_defaults(struct genl_info *info) | |
1264 | { | |
1265 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1266 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1267 | } | |
1268 | ||
5bbcf5e6 | 1269 | static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev) |
d589a21e | 1270 | { |
5bbcf5e6 LE |
1271 | /* This is limited by 16 bit "slot" numbers, |
1272 | * and by available on-disk context storage. | |
1273 | * | |
1274 | * Also (u16)~0 is special (denotes a "free" extent). | |
1275 | * | |
1276 | * One transaction occupies one 4kB on-disk block, | |
1277 | * we have n such blocks in the on disk ring buffer, | |
1278 | * the "current" transaction may fail (n-1), | |
1279 | * and there is 919 slot numbers context information per transaction. | |
1280 | * | |
1281 | * 72 transaction blocks amounts to more than 2**16 context slots, | |
1282 | * so cap there first. | |
1283 | */ | |
1284 | const unsigned int max_al_nr = DRBD_AL_EXTENTS_MAX; | |
1285 | const unsigned int sufficient_on_disk = | |
1286 | (max_al_nr + AL_CONTEXT_PER_TRANSACTION -1) | |
1287 | /AL_CONTEXT_PER_TRANSACTION; | |
d589a21e | 1288 | |
5bbcf5e6 LE |
1289 | unsigned int al_size_4k = bdev->md.al_size_4k; |
1290 | ||
1291 | if (al_size_4k > sufficient_on_disk) | |
1292 | return max_al_nr; | |
1293 | ||
1294 | return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION; | |
d589a21e PR |
1295 | } |
1296 | ||
70df7092 LE |
1297 | static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b) |
1298 | { | |
1299 | return a->disk_barrier != b->disk_barrier || | |
1300 | a->disk_flushes != b->disk_flushes || | |
1301 | a->disk_drain != b->disk_drain; | |
1302 | } | |
1303 | ||
f399002e LE |
1304 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1305 | { | |
a910b123 | 1306 | struct drbd_config_context adm_ctx; |
f399002e | 1307 | enum drbd_ret_code retcode; |
b30ab791 | 1308 | struct drbd_device *device; |
daeda1cc | 1309 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1310 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1311 | int err, fifo_size; |
f399002e | 1312 | |
a910b123 | 1313 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
f399002e LE |
1314 | if (!adm_ctx.reply_skb) |
1315 | return retcode; | |
1316 | if (retcode != NO_ERROR) | |
9e276872 | 1317 | goto finish; |
f399002e | 1318 | |
b30ab791 | 1319 | device = adm_ctx.device; |
9e276872 | 1320 | mutex_lock(&adm_ctx.resource->adm_mutex); |
f399002e LE |
1321 | |
1322 | /* we also need a disk | |
1323 | * to change the options on */ | |
b30ab791 | 1324 | if (!get_ldev(device)) { |
f399002e LE |
1325 | retcode = ERR_NO_DISK; |
1326 | goto out; | |
1327 | } | |
1328 | ||
daeda1cc | 1329 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1330 | if (!new_disk_conf) { |
f399002e LE |
1331 | retcode = ERR_NOMEM; |
1332 | goto fail; | |
1333 | } | |
1334 | ||
0500813f | 1335 | mutex_lock(&device->resource->conf_update); |
b30ab791 | 1336 | old_disk_conf = device->ldev->disk_conf; |
daeda1cc | 1337 | *new_disk_conf = *old_disk_conf; |
5979e361 | 1338 | if (should_set_defaults(info)) |
b966b5dd | 1339 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1340 | |
5ecc72c3 | 1341 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1342 | if (err && err != -ENOMSG) { |
f399002e | 1343 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 1344 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
8e229434 | 1345 | goto fail_unlock; |
f399002e LE |
1346 | } |
1347 | ||
5ecc72c3 LE |
1348 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1349 | new_disk_conf->resync_rate = 1; | |
f399002e | 1350 | |
5bbcf5e6 LE |
1351 | if (new_disk_conf->al_extents < DRBD_AL_EXTENTS_MIN) |
1352 | new_disk_conf->al_extents = DRBD_AL_EXTENTS_MIN; | |
b30ab791 AG |
1353 | if (new_disk_conf->al_extents > drbd_al_extents_max(device->ldev)) |
1354 | new_disk_conf->al_extents = drbd_al_extents_max(device->ldev); | |
5bbcf5e6 LE |
1355 | |
1356 | if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1357 | new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
f399002e | 1358 | |
5ecc72c3 | 1359 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
b30ab791 | 1360 | if (fifo_size != device->rs_plan_s->size) { |
813472ce PR |
1361 | new_plan = fifo_alloc(fifo_size); |
1362 | if (!new_plan) { | |
d0180171 | 1363 | drbd_err(device, "kmalloc of fifo_buffer failed"); |
f399002e | 1364 | retcode = ERR_NOMEM; |
daeda1cc | 1365 | goto fail_unlock; |
f399002e LE |
1366 | } |
1367 | } | |
1368 | ||
b30ab791 AG |
1369 | drbd_suspend_io(device); |
1370 | wait_event(device->al_wait, lc_try_lock(device->act_log)); | |
1371 | drbd_al_shrink(device); | |
1372 | err = drbd_check_al_size(device, new_disk_conf); | |
1373 | lc_unlock(device->act_log); | |
1374 | wake_up(&device->al_wait); | |
1375 | drbd_resume_io(device); | |
f399002e LE |
1376 | |
1377 | if (err) { | |
1378 | retcode = ERR_NOMEM; | |
daeda1cc | 1379 | goto fail_unlock; |
f399002e LE |
1380 | } |
1381 | ||
dc97b708 | 1382 | write_lock_irq(&global_state_lock); |
b30ab791 | 1383 | retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after); |
dc97b708 | 1384 | if (retcode == NO_ERROR) { |
b30ab791 AG |
1385 | rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); |
1386 | drbd_resync_after_changed(device); | |
dc97b708 PR |
1387 | } |
1388 | write_unlock_irq(&global_state_lock); | |
f399002e | 1389 | |
daeda1cc PR |
1390 | if (retcode != NO_ERROR) |
1391 | goto fail_unlock; | |
f399002e | 1392 | |
813472ce | 1393 | if (new_plan) { |
b30ab791 AG |
1394 | old_plan = device->rs_plan_s; |
1395 | rcu_assign_pointer(device->rs_plan_s, new_plan); | |
9958c857 | 1396 | } |
9958c857 | 1397 | |
0500813f | 1398 | mutex_unlock(&device->resource->conf_update); |
27eb13e9 | 1399 | |
9a51ab1c | 1400 | if (new_disk_conf->al_updates) |
b30ab791 | 1401 | device->ldev->md.flags &= ~MDF_AL_DISABLED; |
9a51ab1c | 1402 | else |
b30ab791 | 1403 | device->ldev->md.flags |= MDF_AL_DISABLED; |
9a51ab1c | 1404 | |
691631c0 | 1405 | if (new_disk_conf->md_flushes) |
b30ab791 | 1406 | clear_bit(MD_NO_FUA, &device->flags); |
691631c0 | 1407 | else |
b30ab791 | 1408 | set_bit(MD_NO_FUA, &device->flags); |
691631c0 | 1409 | |
70df7092 LE |
1410 | if (write_ordering_changed(old_disk_conf, new_disk_conf)) |
1411 | drbd_bump_write_ordering(device->resource, NULL, WO_bdev_flush); | |
27eb13e9 | 1412 | |
b30ab791 | 1413 | drbd_md_sync(device); |
f399002e | 1414 | |
69a22773 AG |
1415 | if (device->state.conn >= C_CONNECTED) { |
1416 | struct drbd_peer_device *peer_device; | |
1417 | ||
1418 | for_each_peer_device(peer_device, device) | |
1419 | drbd_send_sync_param(peer_device); | |
1420 | } | |
f399002e | 1421 | |
daeda1cc PR |
1422 | synchronize_rcu(); |
1423 | kfree(old_disk_conf); | |
813472ce | 1424 | kfree(old_plan); |
b30ab791 | 1425 | mod_timer(&device->request_timer, jiffies + HZ); |
daeda1cc PR |
1426 | goto success; |
1427 | ||
1428 | fail_unlock: | |
0500813f | 1429 | mutex_unlock(&device->resource->conf_update); |
f399002e | 1430 | fail: |
5ecc72c3 | 1431 | kfree(new_disk_conf); |
813472ce | 1432 | kfree(new_plan); |
daeda1cc | 1433 | success: |
b30ab791 | 1434 | put_ldev(device); |
f399002e | 1435 | out: |
9e276872 LE |
1436 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
1437 | finish: | |
a910b123 | 1438 | drbd_adm_finish(&adm_ctx, info, retcode); |
f399002e LE |
1439 | return 0; |
1440 | } | |
1441 | ||
3b98c0c2 | 1442 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1443 | { |
a910b123 | 1444 | struct drbd_config_context adm_ctx; |
b30ab791 | 1445 | struct drbd_device *device; |
44a4d551 LE |
1446 | struct drbd_peer_device *peer_device; |
1447 | struct drbd_connection *connection; | |
3b98c0c2 | 1448 | int err; |
116676ca | 1449 | enum drbd_ret_code retcode; |
b411b363 PR |
1450 | enum determine_dev_size dd; |
1451 | sector_t max_possible_sectors; | |
1452 | sector_t min_md_device_sectors; | |
1453 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1454 | struct disk_conf *new_disk_conf = NULL; |
e525fd89 | 1455 | struct block_device *bdev; |
b411b363 | 1456 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1457 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1458 | union drbd_state ns, os; |
f2024e7c | 1459 | enum drbd_state_rv rv; |
44ed167d | 1460 | struct net_conf *nc; |
b411b363 | 1461 | |
a910b123 | 1462 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
1463 | if (!adm_ctx.reply_skb) |
1464 | return retcode; | |
1465 | if (retcode != NO_ERROR) | |
40cbf085 | 1466 | goto finish; |
b411b363 | 1467 | |
b30ab791 | 1468 | device = adm_ctx.device; |
9e276872 | 1469 | mutex_lock(&adm_ctx.resource->adm_mutex); |
44a4d551 LE |
1470 | peer_device = first_peer_device(device); |
1471 | connection = peer_device ? peer_device->connection : NULL; | |
1472 | conn_reconfig_start(connection); | |
b411b363 PR |
1473 | |
1474 | /* if you want to reconfigure, please tear down first */ | |
b30ab791 | 1475 | if (device->state.disk > D_DISKLESS) { |
b411b363 PR |
1476 | retcode = ERR_DISK_CONFIGURED; |
1477 | goto fail; | |
1478 | } | |
82f59cc6 LE |
1479 | /* It may just now have detached because of IO error. Make sure |
1480 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1481 | * e.g. if someone calls attach from the on-io-error handler, | |
1482 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
b30ab791 | 1483 | wait_event(device->misc_wait, !atomic_read(&device->local_cnt)); |
b411b363 | 1484 | |
383606e0 | 1485 | /* make sure there is no leftover from previous force-detach attempts */ |
b30ab791 AG |
1486 | clear_bit(FORCE_DETACH, &device->flags); |
1487 | clear_bit(WAS_IO_ERROR, &device->flags); | |
1488 | clear_bit(WAS_READ_ERROR, &device->flags); | |
383606e0 | 1489 | |
0029d624 | 1490 | /* and no leftover from previously aborted resync or verify, either */ |
b30ab791 AG |
1491 | device->rs_total = 0; |
1492 | device->rs_failed = 0; | |
1493 | atomic_set(&device->rs_pending_cnt, 0); | |
0029d624 | 1494 | |
3b98c0c2 | 1495 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1496 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1497 | if (!nbc) { | |
1498 | retcode = ERR_NOMEM; | |
1499 | goto fail; | |
1500 | } | |
9f2247bb PR |
1501 | spin_lock_init(&nbc->md.uuid_lock); |
1502 | ||
daeda1cc PR |
1503 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1504 | if (!new_disk_conf) { | |
1505 | retcode = ERR_NOMEM; | |
b411b363 PR |
1506 | goto fail; |
1507 | } | |
daeda1cc | 1508 | nbc->disk_conf = new_disk_conf; |
b411b363 | 1509 | |
daeda1cc PR |
1510 | set_disk_conf_defaults(new_disk_conf); |
1511 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1512 | if (err) { |
b411b363 | 1513 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 1514 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
1515 | goto fail; |
1516 | } | |
1517 | ||
5bbcf5e6 LE |
1518 | if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) |
1519 | new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
d589a21e | 1520 | |
9958c857 PR |
1521 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1522 | if (!new_plan) { | |
1523 | retcode = ERR_NOMEM; | |
1524 | goto fail; | |
1525 | } | |
1526 | ||
daeda1cc | 1527 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1528 | retcode = ERR_MD_IDX_INVALID; |
1529 | goto fail; | |
1530 | } | |
1531 | ||
a3f8f7dc | 1532 | write_lock_irq(&global_state_lock); |
b30ab791 | 1533 | retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after); |
a3f8f7dc LE |
1534 | write_unlock_irq(&global_state_lock); |
1535 | if (retcode != NO_ERROR) | |
1536 | goto fail; | |
1537 | ||
44ed167d | 1538 | rcu_read_lock(); |
44a4d551 | 1539 | nc = rcu_dereference(connection->net_conf); |
44ed167d | 1540 | if (nc) { |
daeda1cc | 1541 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1542 | rcu_read_unlock(); |
47ff2d0a PR |
1543 | retcode = ERR_STONITH_AND_PROT_A; |
1544 | goto fail; | |
1545 | } | |
1546 | } | |
44ed167d | 1547 | rcu_read_unlock(); |
47ff2d0a | 1548 | |
daeda1cc | 1549 | bdev = blkdev_get_by_path(new_disk_conf->backing_dev, |
b30ab791 | 1550 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, device); |
e525fd89 | 1551 | if (IS_ERR(bdev)) { |
d0180171 | 1552 | drbd_err(device, "open(\"%s\") failed with %ld\n", new_disk_conf->backing_dev, |
e525fd89 | 1553 | PTR_ERR(bdev)); |
b411b363 PR |
1554 | retcode = ERR_OPEN_DISK; |
1555 | goto fail; | |
1556 | } | |
e525fd89 TH |
1557 | nbc->backing_bdev = bdev; |
1558 | ||
1559 | /* | |
1560 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1561 | * drbd sharing one meta device. TODO in that case, paranoia | |
1562 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1563 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1564 | * should check it for you already; but if you don't, or | |
1565 | * someone fooled it, we need to double check here) | |
1566 | */ | |
daeda1cc | 1567 | bdev = blkdev_get_by_path(new_disk_conf->meta_dev, |
d4d77629 | 1568 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, |
daeda1cc | 1569 | (new_disk_conf->meta_dev_idx < 0) ? |
b30ab791 | 1570 | (void *)device : (void *)drbd_m_holder); |
e525fd89 | 1571 | if (IS_ERR(bdev)) { |
d0180171 | 1572 | drbd_err(device, "open(\"%s\") failed with %ld\n", new_disk_conf->meta_dev, |
e525fd89 | 1573 | PTR_ERR(bdev)); |
b411b363 PR |
1574 | retcode = ERR_OPEN_MD_DISK; |
1575 | goto fail; | |
1576 | } | |
e525fd89 | 1577 | nbc->md_bdev = bdev; |
b411b363 | 1578 | |
e525fd89 | 1579 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1580 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1581 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1582 | retcode = ERR_MD_IDX_INVALID; |
b411b363 PR |
1583 | goto fail; |
1584 | } | |
1585 | ||
1586 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1587 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1588 | offsetof(struct bm_extent, lce)); |
1589 | if (!resync_lru) { | |
1590 | retcode = ERR_NOMEM; | |
e525fd89 | 1591 | goto fail; |
b411b363 PR |
1592 | } |
1593 | ||
c04ccaa6 LE |
1594 | /* Read our meta data super block early. |
1595 | * This also sets other on-disk offsets. */ | |
b30ab791 | 1596 | retcode = drbd_md_read(device, nbc); |
c04ccaa6 LE |
1597 | if (retcode != NO_ERROR) |
1598 | goto fail; | |
b411b363 | 1599 | |
5bbcf5e6 LE |
1600 | if (new_disk_conf->al_extents < DRBD_AL_EXTENTS_MIN) |
1601 | new_disk_conf->al_extents = DRBD_AL_EXTENTS_MIN; | |
1602 | if (new_disk_conf->al_extents > drbd_al_extents_max(nbc)) | |
1603 | new_disk_conf->al_extents = drbd_al_extents_max(nbc); | |
1604 | ||
daeda1cc | 1605 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
d0180171 | 1606 | drbd_err(device, "max capacity %llu smaller than disk size %llu\n", |
b411b363 | 1607 | (unsigned long long) drbd_get_max_capacity(nbc), |
daeda1cc | 1608 | (unsigned long long) new_disk_conf->disk_size); |
7948bcdc | 1609 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1610 | goto fail; |
b411b363 PR |
1611 | } |
1612 | ||
daeda1cc | 1613 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1614 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1615 | /* at least one MB, otherwise it does not make sense */ | |
1616 | min_md_device_sectors = (2<<10); | |
1617 | } else { | |
1618 | max_possible_sectors = DRBD_MAX_SECTORS; | |
ae8bf312 | 1619 | min_md_device_sectors = MD_128MB_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1620 | } |
1621 | ||
b411b363 | 1622 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
7948bcdc | 1623 | retcode = ERR_MD_DISK_TOO_SMALL; |
d0180171 | 1624 | drbd_warn(device, "refusing attach: md-device too small, " |
b411b363 PR |
1625 | "at least %llu sectors needed for this meta-disk type\n", |
1626 | (unsigned long long) min_md_device_sectors); | |
e525fd89 | 1627 | goto fail; |
b411b363 PR |
1628 | } |
1629 | ||
1630 | /* Make sure the new disk is big enough | |
1631 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1632 | if (drbd_get_max_capacity(nbc) < | |
b30ab791 | 1633 | drbd_get_capacity(device->this_bdev)) { |
7948bcdc | 1634 | retcode = ERR_DISK_TOO_SMALL; |
e525fd89 | 1635 | goto fail; |
b411b363 PR |
1636 | } |
1637 | ||
1638 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1639 | ||
1352994b | 1640 | if (nbc->known_size > max_possible_sectors) { |
d0180171 | 1641 | drbd_warn(device, "==> truncating very big lower level device " |
1352994b LE |
1642 | "to currently maximum possible %llu sectors <==\n", |
1643 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1644 | if (new_disk_conf->meta_dev_idx >= 0) |
d0180171 | 1645 | drbd_warn(device, "==>> using internal or flexible " |
1352994b LE |
1646 | "meta data may help <<==\n"); |
1647 | } | |
1648 | ||
b30ab791 | 1649 | drbd_suspend_io(device); |
b411b363 | 1650 | /* also wait for the last barrier ack. */ |
b6dd1a89 LE |
1651 | /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171 |
1652 | * We need a way to either ignore barrier acks for barriers sent before a device | |
1653 | * was attached, or a way to wait for all pending barrier acks to come in. | |
1654 | * As barriers are counted per resource, | |
1655 | * we'd need to suspend io on all devices of a resource. | |
1656 | */ | |
b30ab791 | 1657 | wait_event(device->misc_wait, !atomic_read(&device->ap_pending_cnt) || drbd_suspended(device)); |
b411b363 | 1658 | /* and for any other previously queued work */ |
44a4d551 | 1659 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 | 1660 | |
b30ab791 | 1661 | rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE); |
f2024e7c | 1662 | retcode = rv; /* FIXME: Type mismatch. */ |
b30ab791 | 1663 | drbd_resume_io(device); |
f2024e7c | 1664 | if (rv < SS_SUCCESS) |
e525fd89 | 1665 | goto fail; |
b411b363 | 1666 | |
b30ab791 | 1667 | if (!get_ldev_if_state(device, D_ATTACHING)) |
b411b363 PR |
1668 | goto force_diskless; |
1669 | ||
b30ab791 AG |
1670 | if (!device->bitmap) { |
1671 | if (drbd_bm_init(device)) { | |
b411b363 PR |
1672 | retcode = ERR_NOMEM; |
1673 | goto force_diskless_dec; | |
1674 | } | |
1675 | } | |
1676 | ||
b30ab791 | 1677 | if (device->state.conn < C_CONNECTED && |
babea49e | 1678 | device->state.role == R_PRIMARY && device->ed_uuid && |
b30ab791 | 1679 | (device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { |
d0180171 | 1680 | drbd_err(device, "Can only attach to data with current UUID=%016llX\n", |
b30ab791 | 1681 | (unsigned long long)device->ed_uuid); |
b411b363 PR |
1682 | retcode = ERR_DATA_NOT_CURRENT; |
1683 | goto force_diskless_dec; | |
1684 | } | |
1685 | ||
1686 | /* Since we are diskless, fix the activity log first... */ | |
b30ab791 | 1687 | if (drbd_check_al_size(device, new_disk_conf)) { |
b411b363 PR |
1688 | retcode = ERR_NOMEM; |
1689 | goto force_diskless_dec; | |
1690 | } | |
1691 | ||
1692 | /* Prevent shrinking of consistent devices ! */ | |
1693 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && | |
b30ab791 | 1694 | drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0) < nbc->md.la_size_sect) { |
d0180171 | 1695 | drbd_warn(device, "refusing to truncate a consistent device\n"); |
7948bcdc | 1696 | retcode = ERR_DISK_TOO_SMALL; |
b411b363 PR |
1697 | goto force_diskless_dec; |
1698 | } | |
1699 | ||
b411b363 PR |
1700 | /* Reset the "barriers don't work" bits here, then force meta data to |
1701 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 1702 | if (new_disk_conf->md_flushes) |
b30ab791 | 1703 | clear_bit(MD_NO_FUA, &device->flags); |
b411b363 | 1704 | else |
b30ab791 | 1705 | set_bit(MD_NO_FUA, &device->flags); |
b411b363 PR |
1706 | |
1707 | /* Point of no return reached. | |
1708 | * Devices and memory are no longer released by error cleanup below. | |
b30ab791 | 1709 | * now device takes over responsibility, and the state engine should |
b411b363 | 1710 | * clean it up somewhere. */ |
0b0ba1ef | 1711 | D_ASSERT(device, device->ldev == NULL); |
b30ab791 AG |
1712 | device->ldev = nbc; |
1713 | device->resync = resync_lru; | |
1714 | device->rs_plan_s = new_plan; | |
b411b363 PR |
1715 | nbc = NULL; |
1716 | resync_lru = NULL; | |
daeda1cc | 1717 | new_disk_conf = NULL; |
9958c857 | 1718 | new_plan = NULL; |
b411b363 | 1719 | |
8fe39aac | 1720 | drbd_bump_write_ordering(device->resource, device->ldev, WO_bdev_flush); |
b411b363 | 1721 | |
b30ab791 AG |
1722 | if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY)) |
1723 | set_bit(CRASHED_PRIMARY, &device->flags); | |
b411b363 | 1724 | else |
b30ab791 | 1725 | clear_bit(CRASHED_PRIMARY, &device->flags); |
b411b363 | 1726 | |
b30ab791 | 1727 | if (drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) && |
6bbf53ca | 1728 | !(device->state.role == R_PRIMARY && device->resource->susp_nod)) |
b30ab791 | 1729 | set_bit(CRASHED_PRIMARY, &device->flags); |
b411b363 | 1730 | |
b30ab791 AG |
1731 | device->send_cnt = 0; |
1732 | device->recv_cnt = 0; | |
1733 | device->read_cnt = 0; | |
1734 | device->writ_cnt = 0; | |
b411b363 | 1735 | |
8fe39aac | 1736 | drbd_reconsider_max_bio_size(device, device->ldev); |
b411b363 PR |
1737 | |
1738 | /* If I am currently not R_PRIMARY, | |
1739 | * but meta data primary indicator is set, | |
1740 | * I just now recover from a hard crash, | |
1741 | * and have been R_PRIMARY before that crash. | |
1742 | * | |
1743 | * Now, if I had no connection before that crash | |
1744 | * (have been degraded R_PRIMARY), chances are that | |
1745 | * I won't find my peer now either. | |
1746 | * | |
1747 | * In that case, and _only_ in that case, | |
1748 | * we use the degr-wfc-timeout instead of the default, | |
1749 | * so we can automatically recover from a crash of a | |
1750 | * degraded but active "cluster" after a certain timeout. | |
1751 | */ | |
b30ab791 AG |
1752 | clear_bit(USE_DEGR_WFC_T, &device->flags); |
1753 | if (device->state.role != R_PRIMARY && | |
1754 | drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) && | |
1755 | !drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND)) | |
1756 | set_bit(USE_DEGR_WFC_T, &device->flags); | |
b411b363 | 1757 | |
b30ab791 | 1758 | dd = drbd_determine_dev_size(device, 0, NULL); |
d752b269 | 1759 | if (dd <= DS_ERROR) { |
b411b363 PR |
1760 | retcode = ERR_NOMEM_BITMAP; |
1761 | goto force_diskless_dec; | |
e96c9633 | 1762 | } else if (dd == DS_GREW) |
b30ab791 | 1763 | set_bit(RESYNC_AFTER_NEG, &device->flags); |
b411b363 | 1764 | |
b30ab791 AG |
1765 | if (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) || |
1766 | (test_bit(CRASHED_PRIMARY, &device->flags) && | |
1767 | drbd_md_test_flag(device->ldev, MDF_AL_DISABLED))) { | |
d0180171 | 1768 | drbd_info(device, "Assuming that all blocks are out of sync " |
b411b363 | 1769 | "(aka FullSync)\n"); |
b30ab791 | 1770 | if (drbd_bitmap_io(device, &drbd_bmio_set_n_write, |
20ceb2b2 | 1771 | "set_n_write from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
1772 | retcode = ERR_IO_MD_DISK; |
1773 | goto force_diskless_dec; | |
1774 | } | |
1775 | } else { | |
b30ab791 | 1776 | if (drbd_bitmap_io(device, &drbd_bm_read, |
22ab6a30 | 1777 | "read from attaching", BM_LOCKED_MASK)) { |
19f843aa LE |
1778 | retcode = ERR_IO_MD_DISK; |
1779 | goto force_diskless_dec; | |
1780 | } | |
b411b363 PR |
1781 | } |
1782 | ||
b30ab791 AG |
1783 | if (_drbd_bm_total_weight(device) == drbd_bm_bits(device)) |
1784 | drbd_suspend_al(device); /* IO is still suspended here... */ | |
0778286a | 1785 | |
0500813f | 1786 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 | 1787 | os = drbd_read_state(device); |
78bae59b | 1788 | ns = os; |
b411b363 PR |
1789 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
1790 | otherwise investigate MDF_WasUpToDate... | |
1791 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
1792 | otherwise into D_CONSISTENT state. | |
1793 | */ | |
b30ab791 AG |
1794 | if (drbd_md_test_flag(device->ldev, MDF_CONSISTENT)) { |
1795 | if (drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE)) | |
b411b363 PR |
1796 | ns.disk = D_CONSISTENT; |
1797 | else | |
1798 | ns.disk = D_OUTDATED; | |
1799 | } else { | |
1800 | ns.disk = D_INCONSISTENT; | |
1801 | } | |
1802 | ||
b30ab791 | 1803 | if (drbd_md_test_flag(device->ldev, MDF_PEER_OUT_DATED)) |
b411b363 PR |
1804 | ns.pdsk = D_OUTDATED; |
1805 | ||
daeda1cc PR |
1806 | rcu_read_lock(); |
1807 | if (ns.disk == D_CONSISTENT && | |
b30ab791 | 1808 | (ns.pdsk == D_OUTDATED || rcu_dereference(device->ldev->disk_conf)->fencing == FP_DONT_CARE)) |
b411b363 PR |
1809 | ns.disk = D_UP_TO_DATE; |
1810 | ||
1811 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
1812 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
1813 | this point, because drbd_request_state() modifies these | |
1814 | flags. */ | |
1815 | ||
b30ab791 AG |
1816 | if (rcu_dereference(device->ldev->disk_conf)->al_updates) |
1817 | device->ldev->md.flags &= ~MDF_AL_DISABLED; | |
9a51ab1c | 1818 | else |
b30ab791 | 1819 | device->ldev->md.flags |= MDF_AL_DISABLED; |
9a51ab1c PR |
1820 | |
1821 | rcu_read_unlock(); | |
1822 | ||
b411b363 PR |
1823 | /* In case we are C_CONNECTED postpone any decision on the new disk |
1824 | state after the negotiation phase. */ | |
b30ab791 AG |
1825 | if (device->state.conn == C_CONNECTED) { |
1826 | device->new_state_tmp.i = ns.i; | |
b411b363 PR |
1827 | ns.i = os.i; |
1828 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
1829 | |
1830 | /* We expect to receive up-to-date UUIDs soon. | |
1831 | To avoid a race in receive_state, free p_uuid while | |
1832 | holding req_lock. I.e. atomic with the state change */ | |
b30ab791 AG |
1833 | kfree(device->p_uuid); |
1834 | device->p_uuid = NULL; | |
b411b363 PR |
1835 | } |
1836 | ||
b30ab791 | 1837 | rv = _drbd_set_state(device, ns, CS_VERBOSE, NULL); |
0500813f | 1838 | spin_unlock_irq(&device->resource->req_lock); |
b411b363 PR |
1839 | |
1840 | if (rv < SS_SUCCESS) | |
1841 | goto force_diskless_dec; | |
1842 | ||
b30ab791 | 1843 | mod_timer(&device->request_timer, jiffies + HZ); |
cdfda633 | 1844 | |
b30ab791 AG |
1845 | if (device->state.role == R_PRIMARY) |
1846 | device->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
b411b363 | 1847 | else |
b30ab791 | 1848 | device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; |
b411b363 | 1849 | |
b30ab791 AG |
1850 | drbd_md_mark_dirty(device); |
1851 | drbd_md_sync(device); | |
b411b363 | 1852 | |
b30ab791 AG |
1853 | kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE); |
1854 | put_ldev(device); | |
44a4d551 | 1855 | conn_reconfig_done(connection); |
9e276872 | 1856 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
a910b123 | 1857 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
1858 | return 0; |
1859 | ||
1860 | force_diskless_dec: | |
b30ab791 | 1861 | put_ldev(device); |
b411b363 | 1862 | force_diskless: |
b30ab791 AG |
1863 | drbd_force_state(device, NS(disk, D_DISKLESS)); |
1864 | drbd_md_sync(device); | |
b411b363 | 1865 | fail: |
44a4d551 | 1866 | conn_reconfig_done(connection); |
b411b363 | 1867 | if (nbc) { |
e525fd89 TH |
1868 | if (nbc->backing_bdev) |
1869 | blkdev_put(nbc->backing_bdev, | |
1870 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1871 | if (nbc->md_bdev) | |
1872 | blkdev_put(nbc->md_bdev, | |
1873 | FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
b411b363 PR |
1874 | kfree(nbc); |
1875 | } | |
daeda1cc | 1876 | kfree(new_disk_conf); |
b411b363 | 1877 | lc_destroy(resync_lru); |
9958c857 | 1878 | kfree(new_plan); |
9e276872 | 1879 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
40cbf085 | 1880 | finish: |
a910b123 | 1881 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
1882 | return 0; |
1883 | } | |
1884 | ||
b30ab791 | 1885 | static int adm_detach(struct drbd_device *device, int force) |
b411b363 | 1886 | { |
19f83c76 | 1887 | enum drbd_state_rv retcode; |
9a0d9d03 | 1888 | int ret; |
02ee8f95 | 1889 | |
cdfda633 | 1890 | if (force) { |
b30ab791 AG |
1891 | set_bit(FORCE_DETACH, &device->flags); |
1892 | drbd_force_state(device, NS(disk, D_FAILED)); | |
cdfda633 | 1893 | retcode = SS_SUCCESS; |
02ee8f95 PR |
1894 | goto out; |
1895 | } | |
1896 | ||
b30ab791 AG |
1897 | drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */ |
1898 | drbd_md_get_buffer(device); /* make sure there is no in-flight meta-data IO */ | |
1899 | retcode = drbd_request_state(device, NS(disk, D_FAILED)); | |
1900 | drbd_md_put_buffer(device); | |
9a0d9d03 | 1901 | /* D_FAILED will transition to DISKLESS. */ |
b30ab791 AG |
1902 | ret = wait_event_interruptible(device->misc_wait, |
1903 | device->state.disk != D_FAILED); | |
1904 | drbd_resume_io(device); | |
9b2f61ae | 1905 | if ((int)retcode == (int)SS_IS_DISKLESS) |
9a0d9d03 LE |
1906 | retcode = SS_NOTHING_TO_DO; |
1907 | if (ret) | |
1908 | retcode = ERR_INTR; | |
02ee8f95 | 1909 | out: |
85f75dd7 | 1910 | return retcode; |
b411b363 PR |
1911 | } |
1912 | ||
82f59cc6 LE |
1913 | /* Detaching the disk is a process in multiple stages. First we need to lock |
1914 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
1915 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
1916 | * internal references as well. | |
1917 | * Only then we have finally detached. */ | |
3b98c0c2 | 1918 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1919 | { |
a910b123 | 1920 | struct drbd_config_context adm_ctx; |
116676ca | 1921 | enum drbd_ret_code retcode; |
cdfda633 PR |
1922 | struct detach_parms parms = { }; |
1923 | int err; | |
b411b363 | 1924 | |
a910b123 | 1925 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
1926 | if (!adm_ctx.reply_skb) |
1927 | return retcode; | |
1928 | if (retcode != NO_ERROR) | |
1929 | goto out; | |
b411b363 | 1930 | |
cdfda633 PR |
1931 | if (info->attrs[DRBD_NLA_DETACH_PARMS]) { |
1932 | err = detach_parms_from_attrs(&parms, info); | |
1933 | if (err) { | |
1934 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 1935 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
cdfda633 PR |
1936 | goto out; |
1937 | } | |
b411b363 PR |
1938 | } |
1939 | ||
9e276872 | 1940 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 1941 | retcode = adm_detach(adm_ctx.device, parms.force_detach); |
9e276872 | 1942 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 1943 | out: |
a910b123 | 1944 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
1945 | return 0; |
1946 | } | |
b411b363 | 1947 | |
bde89a9e | 1948 | static bool conn_resync_running(struct drbd_connection *connection) |
f399002e | 1949 | { |
c06ece6b | 1950 | struct drbd_peer_device *peer_device; |
695d08fa | 1951 | bool rv = false; |
f399002e LE |
1952 | int vnr; |
1953 | ||
695d08fa | 1954 | rcu_read_lock(); |
c06ece6b AG |
1955 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
1956 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
1957 | if (device->state.conn == C_SYNC_SOURCE || |
1958 | device->state.conn == C_SYNC_TARGET || | |
1959 | device->state.conn == C_PAUSED_SYNC_S || | |
1960 | device->state.conn == C_PAUSED_SYNC_T) { | |
695d08fa PR |
1961 | rv = true; |
1962 | break; | |
1963 | } | |
b411b363 | 1964 | } |
695d08fa | 1965 | rcu_read_unlock(); |
b411b363 | 1966 | |
695d08fa | 1967 | return rv; |
f399002e | 1968 | } |
47ff2d0a | 1969 | |
bde89a9e | 1970 | static bool conn_ov_running(struct drbd_connection *connection) |
f399002e | 1971 | { |
c06ece6b | 1972 | struct drbd_peer_device *peer_device; |
695d08fa | 1973 | bool rv = false; |
f399002e LE |
1974 | int vnr; |
1975 | ||
695d08fa | 1976 | rcu_read_lock(); |
c06ece6b AG |
1977 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
1978 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
1979 | if (device->state.conn == C_VERIFY_S || |
1980 | device->state.conn == C_VERIFY_T) { | |
695d08fa PR |
1981 | rv = true; |
1982 | break; | |
47ff2d0a PR |
1983 | } |
1984 | } | |
695d08fa | 1985 | rcu_read_unlock(); |
b411b363 | 1986 | |
695d08fa | 1987 | return rv; |
f399002e | 1988 | } |
422028b1 | 1989 | |
cd64397c | 1990 | static enum drbd_ret_code |
270eb5c9 | 1991 | _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_conf *new_net_conf) |
cd64397c | 1992 | { |
c06ece6b | 1993 | struct drbd_peer_device *peer_device; |
cd64397c | 1994 | int i; |
b411b363 | 1995 | |
270eb5c9 AG |
1996 | if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 100) { |
1997 | if (new_net_conf->wire_protocol != old_net_conf->wire_protocol) | |
dcb20d1a | 1998 | return ERR_NEED_APV_100; |
b411b363 | 1999 | |
270eb5c9 | 2000 | if (new_net_conf->two_primaries != old_net_conf->two_primaries) |
dcb20d1a PR |
2001 | return ERR_NEED_APV_100; |
2002 | ||
270eb5c9 | 2003 | if (strcmp(new_net_conf->integrity_alg, old_net_conf->integrity_alg)) |
dcb20d1a | 2004 | return ERR_NEED_APV_100; |
b411b363 PR |
2005 | } |
2006 | ||
270eb5c9 | 2007 | if (!new_net_conf->two_primaries && |
bde89a9e AG |
2008 | conn_highest_role(connection) == R_PRIMARY && |
2009 | conn_highest_peer(connection) == R_PRIMARY) | |
dcb20d1a | 2010 | return ERR_NEED_ALLOW_TWO_PRI; |
b411b363 | 2011 | |
270eb5c9 AG |
2012 | if (new_net_conf->two_primaries && |
2013 | (new_net_conf->wire_protocol != DRBD_PROT_C)) | |
cd64397c PR |
2014 | return ERR_NOT_PROTO_C; |
2015 | ||
c06ece6b AG |
2016 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2017 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2018 | if (get_ldev(device)) { |
2019 | enum drbd_fencing_p fp = rcu_dereference(device->ldev->disk_conf)->fencing; | |
2020 | put_ldev(device); | |
270eb5c9 | 2021 | if (new_net_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 2022 | return ERR_STONITH_AND_PROT_A; |
b411b363 | 2023 | } |
270eb5c9 | 2024 | if (device->state.role == R_PRIMARY && new_net_conf->discard_my_data) |
eb12010e | 2025 | return ERR_DISCARD_IMPOSSIBLE; |
b411b363 PR |
2026 | } |
2027 | ||
270eb5c9 | 2028 | if (new_net_conf->on_congestion != OC_BLOCK && new_net_conf->wire_protocol != DRBD_PROT_A) |
cd64397c | 2029 | return ERR_CONG_NOT_PROTO_A; |
b411b363 | 2030 | |
cd64397c PR |
2031 | return NO_ERROR; |
2032 | } | |
b411b363 | 2033 | |
44ed167d | 2034 | static enum drbd_ret_code |
270eb5c9 | 2035 | check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf) |
44ed167d PR |
2036 | { |
2037 | static enum drbd_ret_code rv; | |
c06ece6b | 2038 | struct drbd_peer_device *peer_device; |
44ed167d | 2039 | int i; |
b411b363 | 2040 | |
44ed167d | 2041 | rcu_read_lock(); |
270eb5c9 | 2042 | rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf); |
44ed167d | 2043 | rcu_read_unlock(); |
b411b363 | 2044 | |
bde89a9e | 2045 | /* connection->volumes protected by genl_lock() here */ |
c06ece6b AG |
2046 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2047 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2048 | if (!device->bitmap) { |
2049 | if (drbd_bm_init(device)) | |
44ed167d | 2050 | return ERR_NOMEM; |
b411b363 PR |
2051 | } |
2052 | } | |
2053 | ||
44ed167d PR |
2054 | return rv; |
2055 | } | |
b411b363 | 2056 | |
0fd0ea06 PR |
2057 | struct crypto { |
2058 | struct crypto_hash *verify_tfm; | |
2059 | struct crypto_hash *csums_tfm; | |
2060 | struct crypto_hash *cram_hmac_tfm; | |
8d412fc6 | 2061 | struct crypto_hash *integrity_tfm; |
0fd0ea06 | 2062 | }; |
b411b363 | 2063 | |
0fd0ea06 | 2064 | static int |
4b6ad6d4 | 2065 | alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
2066 | { |
2067 | if (!tfm_name[0]) | |
2068 | return NO_ERROR; | |
b411b363 | 2069 | |
0fd0ea06 PR |
2070 | *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC); |
2071 | if (IS_ERR(*tfm)) { | |
2072 | *tfm = NULL; | |
2073 | return err_alg; | |
b411b363 | 2074 | } |
b411b363 | 2075 | |
0fd0ea06 PR |
2076 | return NO_ERROR; |
2077 | } | |
b411b363 | 2078 | |
0fd0ea06 | 2079 | static enum drbd_ret_code |
270eb5c9 | 2080 | alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf) |
0fd0ea06 PR |
2081 | { |
2082 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
2083 | enum drbd_ret_code rv; | |
0fd0ea06 | 2084 | |
270eb5c9 | 2085 | rv = alloc_hash(&crypto->csums_tfm, new_net_conf->csums_alg, |
4b6ad6d4 | 2086 | ERR_CSUMS_ALG); |
0fd0ea06 PR |
2087 | if (rv != NO_ERROR) |
2088 | return rv; | |
270eb5c9 | 2089 | rv = alloc_hash(&crypto->verify_tfm, new_net_conf->verify_alg, |
4b6ad6d4 | 2090 | ERR_VERIFY_ALG); |
0fd0ea06 PR |
2091 | if (rv != NO_ERROR) |
2092 | return rv; | |
270eb5c9 | 2093 | rv = alloc_hash(&crypto->integrity_tfm, new_net_conf->integrity_alg, |
4b6ad6d4 | 2094 | ERR_INTEGRITY_ALG); |
0fd0ea06 PR |
2095 | if (rv != NO_ERROR) |
2096 | return rv; | |
270eb5c9 | 2097 | if (new_net_conf->cram_hmac_alg[0] != 0) { |
0fd0ea06 | 2098 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", |
270eb5c9 | 2099 | new_net_conf->cram_hmac_alg); |
b411b363 | 2100 | |
4b6ad6d4 AG |
2101 | rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name, |
2102 | ERR_AUTH_ALG); | |
b411b363 PR |
2103 | } |
2104 | ||
0fd0ea06 PR |
2105 | return rv; |
2106 | } | |
b411b363 | 2107 | |
0fd0ea06 PR |
2108 | static void free_crypto(struct crypto *crypto) |
2109 | { | |
0fd0ea06 | 2110 | crypto_free_hash(crypto->cram_hmac_tfm); |
8d412fc6 | 2111 | crypto_free_hash(crypto->integrity_tfm); |
0fd0ea06 PR |
2112 | crypto_free_hash(crypto->csums_tfm); |
2113 | crypto_free_hash(crypto->verify_tfm); | |
2114 | } | |
b411b363 | 2115 | |
f399002e LE |
2116 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
2117 | { | |
a910b123 | 2118 | struct drbd_config_context adm_ctx; |
f399002e | 2119 | enum drbd_ret_code retcode; |
bde89a9e | 2120 | struct drbd_connection *connection; |
270eb5c9 | 2121 | struct net_conf *old_net_conf, *new_net_conf = NULL; |
f399002e LE |
2122 | int err; |
2123 | int ovr; /* online verify running */ | |
2124 | int rsr; /* re-sync running */ | |
0fd0ea06 | 2125 | struct crypto crypto = { }; |
b411b363 | 2126 | |
a910b123 | 2127 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION); |
f399002e LE |
2128 | if (!adm_ctx.reply_skb) |
2129 | return retcode; | |
2130 | if (retcode != NO_ERROR) | |
9e276872 | 2131 | goto finish; |
b411b363 | 2132 | |
bde89a9e | 2133 | connection = adm_ctx.connection; |
9e276872 | 2134 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2135 | |
270eb5c9 AG |
2136 | new_net_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
2137 | if (!new_net_conf) { | |
f399002e LE |
2138 | retcode = ERR_NOMEM; |
2139 | goto out; | |
2140 | } | |
b411b363 | 2141 | |
bde89a9e | 2142 | conn_reconfig_start(connection); |
b411b363 | 2143 | |
bde89a9e | 2144 | mutex_lock(&connection->data.mutex); |
0500813f | 2145 | mutex_lock(&connection->resource->conf_update); |
270eb5c9 | 2146 | old_net_conf = connection->net_conf; |
2561b9c1 | 2147 | |
270eb5c9 | 2148 | if (!old_net_conf) { |
a910b123 | 2149 | drbd_msg_put_info(adm_ctx.reply_skb, "net conf missing, try connect"); |
f399002e | 2150 | retcode = ERR_INVALID_REQUEST; |
2561b9c1 PR |
2151 | goto fail; |
2152 | } | |
2153 | ||
270eb5c9 | 2154 | *new_net_conf = *old_net_conf; |
5979e361 | 2155 | if (should_set_defaults(info)) |
270eb5c9 | 2156 | set_net_conf_defaults(new_net_conf); |
f399002e | 2157 | |
270eb5c9 | 2158 | err = net_conf_from_attrs_for_change(new_net_conf, info); |
c75b9b10 | 2159 | if (err && err != -ENOMSG) { |
f399002e | 2160 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2161 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
f399002e | 2162 | goto fail; |
2561b9c1 | 2163 | } |
b411b363 | 2164 | |
270eb5c9 | 2165 | retcode = check_net_options(connection, new_net_conf); |
cd64397c PR |
2166 | if (retcode != NO_ERROR) |
2167 | goto fail; | |
b411b363 | 2168 | |
f399002e | 2169 | /* re-sync running */ |
bde89a9e | 2170 | rsr = conn_resync_running(connection); |
270eb5c9 | 2171 | if (rsr && strcmp(new_net_conf->csums_alg, old_net_conf->csums_alg)) { |
f399002e | 2172 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 2173 | goto fail; |
b411b363 PR |
2174 | } |
2175 | ||
f399002e | 2176 | /* online verify running */ |
bde89a9e | 2177 | ovr = conn_ov_running(connection); |
270eb5c9 | 2178 | if (ovr && strcmp(new_net_conf->verify_alg, old_net_conf->verify_alg)) { |
0fd0ea06 | 2179 | retcode = ERR_VERIFY_RUNNING; |
b411b363 | 2180 | goto fail; |
f399002e | 2181 | } |
b411b363 | 2182 | |
270eb5c9 | 2183 | retcode = alloc_crypto(&crypto, new_net_conf); |
0fd0ea06 | 2184 | if (retcode != NO_ERROR) |
b411b363 | 2185 | goto fail; |
f399002e | 2186 | |
270eb5c9 | 2187 | rcu_assign_pointer(connection->net_conf, new_net_conf); |
f399002e LE |
2188 | |
2189 | if (!rsr) { | |
bde89a9e AG |
2190 | crypto_free_hash(connection->csums_tfm); |
2191 | connection->csums_tfm = crypto.csums_tfm; | |
0fd0ea06 | 2192 | crypto.csums_tfm = NULL; |
f399002e LE |
2193 | } |
2194 | if (!ovr) { | |
bde89a9e AG |
2195 | crypto_free_hash(connection->verify_tfm); |
2196 | connection->verify_tfm = crypto.verify_tfm; | |
0fd0ea06 | 2197 | crypto.verify_tfm = NULL; |
b411b363 PR |
2198 | } |
2199 | ||
bde89a9e AG |
2200 | crypto_free_hash(connection->integrity_tfm); |
2201 | connection->integrity_tfm = crypto.integrity_tfm; | |
2202 | if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100) | |
2203 | /* Do this without trying to take connection->data.mutex again. */ | |
2204 | __drbd_send_protocol(connection, P_PROTOCOL_UPDATE); | |
0fd0ea06 | 2205 | |
bde89a9e AG |
2206 | crypto_free_hash(connection->cram_hmac_tfm); |
2207 | connection->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
0fd0ea06 | 2208 | |
0500813f | 2209 | mutex_unlock(&connection->resource->conf_update); |
bde89a9e | 2210 | mutex_unlock(&connection->data.mutex); |
91fd4dad | 2211 | synchronize_rcu(); |
270eb5c9 | 2212 | kfree(old_net_conf); |
91fd4dad | 2213 | |
69a22773 AG |
2214 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
2215 | struct drbd_peer_device *peer_device; | |
2216 | int vnr; | |
2217 | ||
2218 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) | |
2219 | drbd_send_sync_param(peer_device); | |
2220 | } | |
f399002e | 2221 | |
91fd4dad PR |
2222 | goto done; |
2223 | ||
b411b363 | 2224 | fail: |
0500813f | 2225 | mutex_unlock(&connection->resource->conf_update); |
bde89a9e | 2226 | mutex_unlock(&connection->data.mutex); |
0fd0ea06 | 2227 | free_crypto(&crypto); |
270eb5c9 | 2228 | kfree(new_net_conf); |
91fd4dad | 2229 | done: |
bde89a9e | 2230 | conn_reconfig_done(connection); |
f399002e | 2231 | out: |
9e276872 LE |
2232 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
2233 | finish: | |
a910b123 | 2234 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2235 | return 0; |
2236 | } | |
2237 | ||
3b98c0c2 | 2238 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2239 | { |
a910b123 | 2240 | struct drbd_config_context adm_ctx; |
c06ece6b | 2241 | struct drbd_peer_device *peer_device; |
270eb5c9 | 2242 | struct net_conf *old_net_conf, *new_net_conf = NULL; |
0fd0ea06 | 2243 | struct crypto crypto = { }; |
77c556f6 | 2244 | struct drbd_resource *resource; |
bde89a9e | 2245 | struct drbd_connection *connection; |
3b98c0c2 LE |
2246 | enum drbd_ret_code retcode; |
2247 | int i; | |
2248 | int err; | |
b411b363 | 2249 | |
a910b123 | 2250 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
b411b363 | 2251 | |
3b98c0c2 LE |
2252 | if (!adm_ctx.reply_skb) |
2253 | return retcode; | |
2254 | if (retcode != NO_ERROR) | |
2255 | goto out; | |
089c075d | 2256 | if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) { |
a910b123 | 2257 | drbd_msg_put_info(adm_ctx.reply_skb, "connection endpoint(s) missing"); |
089c075d AG |
2258 | retcode = ERR_INVALID_REQUEST; |
2259 | goto out; | |
2260 | } | |
b411b363 | 2261 | |
089c075d AG |
2262 | /* No need for _rcu here. All reconfiguration is |
2263 | * strictly serialized on genl_lock(). We are protected against | |
2264 | * concurrent reconfiguration/addition/deletion */ | |
77c556f6 AG |
2265 | for_each_resource(resource, &drbd_resources) { |
2266 | for_each_connection(connection, resource) { | |
2267 | if (nla_len(adm_ctx.my_addr) == connection->my_addr_len && | |
2268 | !memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr, | |
2269 | connection->my_addr_len)) { | |
2270 | retcode = ERR_LOCAL_ADDR; | |
2271 | goto out; | |
2272 | } | |
b411b363 | 2273 | |
77c556f6 AG |
2274 | if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len && |
2275 | !memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr, | |
2276 | connection->peer_addr_len)) { | |
2277 | retcode = ERR_PEER_ADDR; | |
2278 | goto out; | |
2279 | } | |
089c075d | 2280 | } |
b411b363 PR |
2281 | } |
2282 | ||
9e276872 | 2283 | mutex_lock(&adm_ctx.resource->adm_mutex); |
3ab706fe | 2284 | connection = first_connection(adm_ctx.resource); |
bde89a9e | 2285 | conn_reconfig_start(connection); |
b411b363 | 2286 | |
bde89a9e | 2287 | if (connection->cstate > C_STANDALONE) { |
b411b363 | 2288 | retcode = ERR_NET_CONFIGURED; |
b411b363 PR |
2289 | goto fail; |
2290 | } | |
2291 | ||
a209b4ae | 2292 | /* allocation not in the IO path, drbdsetup / netlink process context */ |
270eb5c9 AG |
2293 | new_net_conf = kzalloc(sizeof(*new_net_conf), GFP_KERNEL); |
2294 | if (!new_net_conf) { | |
b411b363 | 2295 | retcode = ERR_NOMEM; |
b411b363 PR |
2296 | goto fail; |
2297 | } | |
2298 | ||
270eb5c9 | 2299 | set_net_conf_defaults(new_net_conf); |
b411b363 | 2300 | |
270eb5c9 | 2301 | err = net_conf_from_attrs(new_net_conf, info); |
25e40932 | 2302 | if (err && err != -ENOMSG) { |
b411b363 | 2303 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2304 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2305 | goto fail; |
2306 | } | |
2307 | ||
270eb5c9 | 2308 | retcode = check_net_options(connection, new_net_conf); |
cd64397c | 2309 | if (retcode != NO_ERROR) |
422028b1 | 2310 | goto fail; |
b411b363 | 2311 | |
270eb5c9 | 2312 | retcode = alloc_crypto(&crypto, new_net_conf); |
0fd0ea06 PR |
2313 | if (retcode != NO_ERROR) |
2314 | goto fail; | |
b411b363 | 2315 | |
270eb5c9 | 2316 | ((char *)new_net_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
7b4e4d31 | 2317 | |
b5043c5e | 2318 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 | 2319 | |
0500813f | 2320 | mutex_lock(&adm_ctx.resource->conf_update); |
270eb5c9 AG |
2321 | old_net_conf = connection->net_conf; |
2322 | if (old_net_conf) { | |
b411b363 | 2323 | retcode = ERR_NET_CONFIGURED; |
0500813f | 2324 | mutex_unlock(&adm_ctx.resource->conf_update); |
b411b363 PR |
2325 | goto fail; |
2326 | } | |
270eb5c9 | 2327 | rcu_assign_pointer(connection->net_conf, new_net_conf); |
b411b363 | 2328 | |
bde89a9e AG |
2329 | conn_free_crypto(connection); |
2330 | connection->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
2331 | connection->integrity_tfm = crypto.integrity_tfm; | |
2332 | connection->csums_tfm = crypto.csums_tfm; | |
2333 | connection->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2334 | |
bde89a9e AG |
2335 | connection->my_addr_len = nla_len(adm_ctx.my_addr); |
2336 | memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len); | |
2337 | connection->peer_addr_len = nla_len(adm_ctx.peer_addr); | |
2338 | memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len); | |
b411b363 | 2339 | |
0500813f | 2340 | mutex_unlock(&adm_ctx.resource->conf_update); |
b411b363 | 2341 | |
695d08fa | 2342 | rcu_read_lock(); |
c06ece6b AG |
2343 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2344 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2345 | device->send_cnt = 0; |
2346 | device->recv_cnt = 0; | |
b411b363 | 2347 | } |
695d08fa | 2348 | rcu_read_unlock(); |
b411b363 | 2349 | |
bde89a9e | 2350 | retcode = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE); |
b411b363 | 2351 | |
bde89a9e | 2352 | conn_reconfig_done(connection); |
9e276872 | 2353 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
a910b123 | 2354 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 | 2355 | return 0; |
b411b363 | 2356 | |
b411b363 | 2357 | fail: |
0fd0ea06 | 2358 | free_crypto(&crypto); |
270eb5c9 | 2359 | kfree(new_net_conf); |
b411b363 | 2360 | |
bde89a9e | 2361 | conn_reconfig_done(connection); |
9e276872 | 2362 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2363 | out: |
a910b123 | 2364 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2365 | return 0; |
2366 | } | |
2367 | ||
bde89a9e | 2368 | static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force) |
85f75dd7 LE |
2369 | { |
2370 | enum drbd_state_rv rv; | |
85f75dd7 | 2371 | |
bde89a9e | 2372 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), |
f3dfa40a | 2373 | force ? CS_HARD : 0); |
85f75dd7 LE |
2374 | |
2375 | switch (rv) { | |
2376 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2377 | break; |
85f75dd7 LE |
2378 | case SS_ALREADY_STANDALONE: |
2379 | return SS_SUCCESS; | |
2380 | case SS_PRIMARY_NOP: | |
2381 | /* Our state checking code wants to see the peer outdated. */ | |
bde89a9e | 2382 | rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0); |
2bd5ed5d PR |
2383 | |
2384 | if (rv == SS_OUTDATE_WO_CONN) /* lost connection before graceful disconnect succeeded */ | |
bde89a9e | 2385 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE); |
2bd5ed5d | 2386 | |
85f75dd7 LE |
2387 | break; |
2388 | case SS_CW_FAILED_BY_PEER: | |
2389 | /* The peer probably wants to see us outdated. */ | |
bde89a9e | 2390 | rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, |
85f75dd7 LE |
2391 | disk, D_OUTDATED), 0); |
2392 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
bde89a9e | 2393 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), |
f3dfa40a | 2394 | CS_HARD); |
b411b363 | 2395 | } |
85f75dd7 LE |
2396 | break; |
2397 | default:; | |
2398 | /* no special handling necessary */ | |
2399 | } | |
2400 | ||
f3dfa40a LE |
2401 | if (rv >= SS_SUCCESS) { |
2402 | enum drbd_state_rv rv2; | |
2403 | /* No one else can reconfigure the network while I am here. | |
2404 | * The state handling only uses drbd_thread_stop_nowait(), | |
2405 | * we want to really wait here until the receiver is no more. | |
2406 | */ | |
9693da23 | 2407 | drbd_thread_stop(&connection->receiver); |
f3dfa40a LE |
2408 | |
2409 | /* Race breaker. This additional state change request may be | |
2410 | * necessary, if this was a forced disconnect during a receiver | |
2411 | * restart. We may have "killed" the receiver thread just | |
8fe60551 | 2412 | * after drbd_receiver() returned. Typically, we should be |
f3dfa40a LE |
2413 | * C_STANDALONE already, now, and this becomes a no-op. |
2414 | */ | |
bde89a9e | 2415 | rv2 = conn_request_state(connection, NS(conn, C_STANDALONE), |
f3dfa40a LE |
2416 | CS_VERBOSE | CS_HARD); |
2417 | if (rv2 < SS_SUCCESS) | |
1ec861eb | 2418 | drbd_err(connection, |
f3dfa40a LE |
2419 | "unexpected rv2=%d in conn_try_disconnect()\n", |
2420 | rv2); | |
b411b363 | 2421 | } |
85f75dd7 LE |
2422 | return rv; |
2423 | } | |
b411b363 | 2424 | |
3b98c0c2 | 2425 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2426 | { |
a910b123 | 2427 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2428 | struct disconnect_parms parms; |
bde89a9e | 2429 | struct drbd_connection *connection; |
85f75dd7 | 2430 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2431 | enum drbd_ret_code retcode; |
2432 | int err; | |
2561b9c1 | 2433 | |
a910b123 | 2434 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION); |
3b98c0c2 LE |
2435 | if (!adm_ctx.reply_skb) |
2436 | return retcode; | |
2437 | if (retcode != NO_ERROR) | |
2561b9c1 | 2438 | goto fail; |
b411b363 | 2439 | |
bde89a9e | 2440 | connection = adm_ctx.connection; |
3b98c0c2 LE |
2441 | memset(&parms, 0, sizeof(parms)); |
2442 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2443 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2444 | if (err) { |
2445 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 2446 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2447 | goto fail; |
2448 | } | |
2449 | } | |
2450 | ||
9e276872 | 2451 | mutex_lock(&adm_ctx.resource->adm_mutex); |
bde89a9e | 2452 | rv = conn_try_disconnect(connection, parms.force_disconnect); |
85f75dd7 | 2453 | if (rv < SS_SUCCESS) |
f3dfa40a LE |
2454 | retcode = rv; /* FIXME: Type mismatch. */ |
2455 | else | |
2456 | retcode = NO_ERROR; | |
9e276872 | 2457 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2458 | fail: |
a910b123 | 2459 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2460 | return 0; |
2461 | } | |
2462 | ||
b30ab791 | 2463 | void resync_after_online_grow(struct drbd_device *device) |
b411b363 PR |
2464 | { |
2465 | int iass; /* I am sync source */ | |
2466 | ||
d0180171 | 2467 | drbd_info(device, "Resync of new storage after online grow\n"); |
b30ab791 AG |
2468 | if (device->state.role != device->state.peer) |
2469 | iass = (device->state.role == R_PRIMARY); | |
b411b363 | 2470 | else |
a6b32bc3 | 2471 | iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags); |
b411b363 PR |
2472 | |
2473 | if (iass) | |
b30ab791 | 2474 | drbd_start_resync(device, C_SYNC_SOURCE); |
b411b363 | 2475 | else |
b30ab791 | 2476 | _drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); |
b411b363 PR |
2477 | } |
2478 | ||
3b98c0c2 | 2479 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2480 | { |
a910b123 | 2481 | struct drbd_config_context adm_ctx; |
daeda1cc | 2482 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 | 2483 | struct resize_parms rs; |
b30ab791 | 2484 | struct drbd_device *device; |
3b98c0c2 | 2485 | enum drbd_ret_code retcode; |
b411b363 | 2486 | enum determine_dev_size dd; |
d752b269 | 2487 | bool change_al_layout = false; |
6495d2c6 | 2488 | enum dds_flags ddsf; |
daeda1cc | 2489 | sector_t u_size; |
3b98c0c2 | 2490 | int err; |
b411b363 | 2491 | |
a910b123 | 2492 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2493 | if (!adm_ctx.reply_skb) |
2494 | return retcode; | |
2495 | if (retcode != NO_ERROR) | |
9e276872 | 2496 | goto finish; |
3b98c0c2 | 2497 | |
9e276872 | 2498 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
2499 | device = adm_ctx.device; |
2500 | if (!get_ldev(device)) { | |
d752b269 PR |
2501 | retcode = ERR_NO_DISK; |
2502 | goto fail; | |
2503 | } | |
2504 | ||
3b98c0c2 | 2505 | memset(&rs, 0, sizeof(struct resize_parms)); |
b30ab791 AG |
2506 | rs.al_stripes = device->ldev->md.al_stripes; |
2507 | rs.al_stripe_size = device->ldev->md.al_stripe_size_4k * 4; | |
3b98c0c2 | 2508 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { |
f399002e | 2509 | err = resize_parms_from_attrs(&rs, info); |
b411b363 | 2510 | if (err) { |
3b98c0c2 | 2511 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2512 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
d752b269 | 2513 | goto fail_ldev; |
b411b363 PR |
2514 | } |
2515 | } | |
2516 | ||
b30ab791 | 2517 | if (device->state.conn > C_CONNECTED) { |
b411b363 | 2518 | retcode = ERR_RESIZE_RESYNC; |
d752b269 | 2519 | goto fail_ldev; |
b411b363 | 2520 | } |
b411b363 | 2521 | |
b30ab791 AG |
2522 | if (device->state.role == R_SECONDARY && |
2523 | device->state.peer == R_SECONDARY) { | |
b411b363 | 2524 | retcode = ERR_NO_PRIMARY; |
d752b269 | 2525 | goto fail_ldev; |
b411b363 | 2526 | } |
b411b363 | 2527 | |
a6b32bc3 | 2528 | if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) { |
6495d2c6 | 2529 | retcode = ERR_NEED_APV_93; |
9bcd2521 | 2530 | goto fail_ldev; |
6495d2c6 PR |
2531 | } |
2532 | ||
daeda1cc | 2533 | rcu_read_lock(); |
b30ab791 | 2534 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
daeda1cc PR |
2535 | rcu_read_unlock(); |
2536 | if (u_size != (sector_t)rs.resize_size) { | |
2537 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2538 | if (!new_disk_conf) { | |
778f271d | 2539 | retcode = ERR_NOMEM; |
9bcd2521 | 2540 | goto fail_ldev; |
778f271d PR |
2541 | } |
2542 | } | |
2543 | ||
b30ab791 AG |
2544 | if (device->ldev->md.al_stripes != rs.al_stripes || |
2545 | device->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) { | |
d752b269 PR |
2546 | u32 al_size_k = rs.al_stripes * rs.al_stripe_size; |
2547 | ||
2548 | if (al_size_k > (16 * 1024 * 1024)) { | |
2549 | retcode = ERR_MD_LAYOUT_TOO_BIG; | |
2550 | goto fail_ldev; | |
2551 | } | |
2552 | ||
2553 | if (al_size_k < MD_32kB_SECT/2) { | |
2554 | retcode = ERR_MD_LAYOUT_TOO_SMALL; | |
2555 | goto fail_ldev; | |
2556 | } | |
2557 | ||
cdc6af8d | 2558 | if (device->state.conn != C_CONNECTED && !rs.resize_force) { |
d752b269 PR |
2559 | retcode = ERR_MD_LAYOUT_CONNECTED; |
2560 | goto fail_ldev; | |
2561 | } | |
2562 | ||
2563 | change_al_layout = true; | |
2564 | } | |
2565 | ||
b30ab791 AG |
2566 | if (device->ldev->known_size != drbd_get_capacity(device->ldev->backing_bdev)) |
2567 | device->ldev->known_size = drbd_get_capacity(device->ldev->backing_bdev); | |
b411b363 | 2568 | |
daeda1cc | 2569 | if (new_disk_conf) { |
0500813f | 2570 | mutex_lock(&device->resource->conf_update); |
b30ab791 | 2571 | old_disk_conf = device->ldev->disk_conf; |
daeda1cc PR |
2572 | *new_disk_conf = *old_disk_conf; |
2573 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
b30ab791 | 2574 | rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); |
0500813f | 2575 | mutex_unlock(&device->resource->conf_update); |
daeda1cc PR |
2576 | synchronize_rcu(); |
2577 | kfree(old_disk_conf); | |
b411b363 PR |
2578 | } |
2579 | ||
6495d2c6 | 2580 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
b30ab791 AG |
2581 | dd = drbd_determine_dev_size(device, ddsf, change_al_layout ? &rs : NULL); |
2582 | drbd_md_sync(device); | |
2583 | put_ldev(device); | |
e96c9633 | 2584 | if (dd == DS_ERROR) { |
b411b363 PR |
2585 | retcode = ERR_NOMEM_BITMAP; |
2586 | goto fail; | |
d752b269 PR |
2587 | } else if (dd == DS_ERROR_SPACE_MD) { |
2588 | retcode = ERR_MD_LAYOUT_NO_FIT; | |
2589 | goto fail; | |
2590 | } else if (dd == DS_ERROR_SHRINK) { | |
2591 | retcode = ERR_IMPLICIT_SHRINK; | |
2592 | goto fail; | |
b411b363 | 2593 | } |
778f271d | 2594 | |
b30ab791 | 2595 | if (device->state.conn == C_CONNECTED) { |
e96c9633 | 2596 | if (dd == DS_GREW) |
b30ab791 | 2597 | set_bit(RESIZE_PENDING, &device->flags); |
b411b363 | 2598 | |
69a22773 AG |
2599 | drbd_send_uuids(first_peer_device(device)); |
2600 | drbd_send_sizes(first_peer_device(device), 1, ddsf); | |
778f271d PR |
2601 | } |
2602 | ||
b411b363 | 2603 | fail: |
9e276872 LE |
2604 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
2605 | finish: | |
a910b123 | 2606 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 | 2607 | return 0; |
b411b363 | 2608 | |
9bcd2521 | 2609 | fail_ldev: |
b30ab791 | 2610 | put_ldev(device); |
9bcd2521 | 2611 | goto fail; |
b411b363 | 2612 | } |
b411b363 | 2613 | |
f399002e | 2614 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2615 | { |
a910b123 | 2616 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2617 | enum drbd_ret_code retcode; |
b57a1e27 | 2618 | struct res_opts res_opts; |
f399002e | 2619 | int err; |
b411b363 | 2620 | |
a910b123 | 2621 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
2622 | if (!adm_ctx.reply_skb) |
2623 | return retcode; | |
2624 | if (retcode != NO_ERROR) | |
2625 | goto fail; | |
b411b363 | 2626 | |
eb6bea67 | 2627 | res_opts = adm_ctx.resource->res_opts; |
5979e361 | 2628 | if (should_set_defaults(info)) |
b966b5dd | 2629 | set_res_opts_defaults(&res_opts); |
b411b363 | 2630 | |
b57a1e27 | 2631 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2632 | if (err && err != -ENOMSG) { |
b411b363 | 2633 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2634 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2635 | goto fail; |
2636 | } | |
2637 | ||
9e276872 | 2638 | mutex_lock(&adm_ctx.resource->adm_mutex); |
eb6bea67 | 2639 | err = set_resource_options(adm_ctx.resource, &res_opts); |
afbbfa88 AG |
2640 | if (err) { |
2641 | retcode = ERR_INVALID_REQUEST; | |
2642 | if (err == -ENOMEM) | |
2643 | retcode = ERR_NOMEM; | |
b411b363 | 2644 | } |
9e276872 | 2645 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2646 | |
b411b363 | 2647 | fail: |
a910b123 | 2648 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2649 | return 0; |
2650 | } | |
2651 | ||
3b98c0c2 | 2652 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2653 | { |
a910b123 | 2654 | struct drbd_config_context adm_ctx; |
b30ab791 | 2655 | struct drbd_device *device; |
3b98c0c2 LE |
2656 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
2657 | ||
a910b123 | 2658 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2659 | if (!adm_ctx.reply_skb) |
2660 | return retcode; | |
2661 | if (retcode != NO_ERROR) | |
2662 | goto out; | |
2663 | ||
b30ab791 | 2664 | device = adm_ctx.device; |
8fe39aac PR |
2665 | if (!get_ldev(device)) { |
2666 | retcode = ERR_NO_DISK; | |
2667 | goto out; | |
2668 | } | |
2669 | ||
2670 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 2671 | |
194bfb32 | 2672 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
2673 | * resync just being finished, wait for it before requesting a new resync. |
2674 | * Also wait for it's after_state_ch(). */ | |
b30ab791 AG |
2675 | drbd_suspend_io(device); |
2676 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
b5043c5e | 2677 | drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work); |
194bfb32 | 2678 | |
0b2dafcd PR |
2679 | /* If we happen to be C_STANDALONE R_SECONDARY, just change to |
2680 | * D_INCONSISTENT, and set all bits in the bitmap. Otherwise, | |
2681 | * try to start a resync handshake as sync target for full sync. | |
9376d9f8 | 2682 | */ |
b30ab791 AG |
2683 | if (device->state.conn == C_STANDALONE && device->state.role == R_SECONDARY) { |
2684 | retcode = drbd_request_state(device, NS(disk, D_INCONSISTENT)); | |
0b2dafcd | 2685 | if (retcode >= SS_SUCCESS) { |
b30ab791 | 2686 | if (drbd_bitmap_io(device, &drbd_bmio_set_n_write, |
0b2dafcd PR |
2687 | "set_n_write from invalidate", BM_LOCKED_MASK)) |
2688 | retcode = ERR_IO_MD_DISK; | |
2689 | } | |
2690 | } else | |
b30ab791 AG |
2691 | retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_T)); |
2692 | drbd_resume_io(device); | |
9e276872 | 2693 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
8fe39aac | 2694 | put_ldev(device); |
3b98c0c2 | 2695 | out: |
a910b123 | 2696 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2697 | return 0; |
2698 | } | |
2699 | ||
3b98c0c2 LE |
2700 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
2701 | union drbd_state mask, union drbd_state val) | |
b411b363 | 2702 | { |
a910b123 | 2703 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2704 | enum drbd_ret_code retcode; |
194bfb32 | 2705 | |
a910b123 | 2706 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2707 | if (!adm_ctx.reply_skb) |
2708 | return retcode; | |
2709 | if (retcode != NO_ERROR) | |
2710 | goto out; | |
b411b363 | 2711 | |
9e276872 | 2712 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 2713 | retcode = drbd_request_state(adm_ctx.device, mask, val); |
9e276872 | 2714 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2715 | out: |
a910b123 | 2716 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2717 | return 0; |
2718 | } | |
2719 | ||
8fe39aac | 2720 | static int drbd_bmio_set_susp_al(struct drbd_device *device) __must_hold(local) |
0778286a PR |
2721 | { |
2722 | int rv; | |
2723 | ||
b30ab791 AG |
2724 | rv = drbd_bmio_set_n_write(device); |
2725 | drbd_suspend_al(device); | |
0778286a PR |
2726 | return rv; |
2727 | } | |
2728 | ||
3b98c0c2 | 2729 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2730 | { |
a910b123 | 2731 | struct drbd_config_context adm_ctx; |
25b0d6c8 | 2732 | int retcode; /* drbd_ret_code, drbd_state_rv */ |
b30ab791 | 2733 | struct drbd_device *device; |
25b0d6c8 | 2734 | |
a910b123 | 2735 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
25b0d6c8 PR |
2736 | if (!adm_ctx.reply_skb) |
2737 | return retcode; | |
2738 | if (retcode != NO_ERROR) | |
2739 | goto out; | |
2740 | ||
b30ab791 | 2741 | device = adm_ctx.device; |
8fe39aac PR |
2742 | if (!get_ldev(device)) { |
2743 | retcode = ERR_NO_DISK; | |
2744 | goto out; | |
2745 | } | |
2746 | ||
2747 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 2748 | |
194bfb32 | 2749 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
2750 | * resync just being finished, wait for it before requesting a new resync. |
2751 | * Also wait for it's after_state_ch(). */ | |
b30ab791 AG |
2752 | drbd_suspend_io(device); |
2753 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
b5043c5e | 2754 | drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work); |
194bfb32 | 2755 | |
0b2dafcd PR |
2756 | /* If we happen to be C_STANDALONE R_PRIMARY, just set all bits |
2757 | * in the bitmap. Otherwise, try to start a resync handshake | |
2758 | * as sync source for full sync. | |
2759 | */ | |
b30ab791 | 2760 | if (device->state.conn == C_STANDALONE && device->state.role == R_PRIMARY) { |
0b2dafcd PR |
2761 | /* The peer will get a resync upon connect anyways. Just make that |
2762 | into a full resync. */ | |
b30ab791 | 2763 | retcode = drbd_request_state(device, NS(pdsk, D_INCONSISTENT)); |
0b2dafcd | 2764 | if (retcode >= SS_SUCCESS) { |
b30ab791 | 2765 | if (drbd_bitmap_io(device, &drbd_bmio_set_susp_al, |
0b2dafcd PR |
2766 | "set_n_write from invalidate_peer", |
2767 | BM_LOCKED_SET_ALLOWED)) | |
2768 | retcode = ERR_IO_MD_DISK; | |
2769 | } | |
2770 | } else | |
b30ab791 AG |
2771 | retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_S)); |
2772 | drbd_resume_io(device); | |
9e276872 | 2773 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
8fe39aac | 2774 | put_ldev(device); |
25b0d6c8 | 2775 | out: |
a910b123 | 2776 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2777 | return 0; |
2778 | } | |
2779 | ||
3b98c0c2 | 2780 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2781 | { |
a910b123 | 2782 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2783 | enum drbd_ret_code retcode; |
b411b363 | 2784 | |
a910b123 | 2785 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2786 | if (!adm_ctx.reply_skb) |
2787 | return retcode; | |
2788 | if (retcode != NO_ERROR) | |
2789 | goto out; | |
b411b363 | 2790 | |
9e276872 | 2791 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 2792 | if (drbd_request_state(adm_ctx.device, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
3b98c0c2 | 2793 | retcode = ERR_PAUSE_IS_SET; |
9e276872 | 2794 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2795 | out: |
a910b123 | 2796 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2797 | return 0; |
2798 | } | |
2799 | ||
3b98c0c2 | 2800 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2801 | { |
a910b123 | 2802 | struct drbd_config_context adm_ctx; |
da9fbc27 | 2803 | union drbd_dev_state s; |
3b98c0c2 LE |
2804 | enum drbd_ret_code retcode; |
2805 | ||
a910b123 | 2806 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2807 | if (!adm_ctx.reply_skb) |
2808 | return retcode; | |
2809 | if (retcode != NO_ERROR) | |
2810 | goto out; | |
b411b363 | 2811 | |
9e276872 | 2812 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
2813 | if (drbd_request_state(adm_ctx.device, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
2814 | s = adm_ctx.device->state; | |
cd88d030 PR |
2815 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
2816 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
2817 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
2818 | } else { | |
2819 | retcode = ERR_PAUSE_IS_CLEAR; | |
2820 | } | |
2821 | } | |
9e276872 | 2822 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2823 | out: |
a910b123 | 2824 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2825 | return 0; |
2826 | } | |
2827 | ||
3b98c0c2 | 2828 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2829 | { |
3b98c0c2 | 2830 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
2831 | } |
2832 | ||
3b98c0c2 | 2833 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2834 | { |
a910b123 | 2835 | struct drbd_config_context adm_ctx; |
b30ab791 | 2836 | struct drbd_device *device; |
3b98c0c2 LE |
2837 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
2838 | ||
a910b123 | 2839 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2840 | if (!adm_ctx.reply_skb) |
2841 | return retcode; | |
2842 | if (retcode != NO_ERROR) | |
2843 | goto out; | |
2844 | ||
9e276872 | 2845 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
2846 | device = adm_ctx.device; |
2847 | if (test_bit(NEW_CUR_UUID, &device->flags)) { | |
2848 | drbd_uuid_new_current(device); | |
2849 | clear_bit(NEW_CUR_UUID, &device->flags); | |
43a5182c | 2850 | } |
b30ab791 AG |
2851 | drbd_suspend_io(device); |
2852 | retcode = drbd_request_state(device, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); | |
3b98c0c2 | 2853 | if (retcode == SS_SUCCESS) { |
b30ab791 | 2854 | if (device->state.conn < C_CONNECTED) |
a6b32bc3 | 2855 | tl_clear(first_peer_device(device)->connection); |
b30ab791 | 2856 | if (device->state.disk == D_DISKLESS || device->state.disk == D_FAILED) |
a6b32bc3 | 2857 | tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO); |
265be2d0 | 2858 | } |
b30ab791 | 2859 | drbd_resume_io(device); |
9e276872 | 2860 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2861 | out: |
a910b123 | 2862 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2863 | return 0; |
2864 | } | |
2865 | ||
3b98c0c2 | 2866 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2867 | { |
3b98c0c2 | 2868 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
2869 | } |
2870 | ||
251b8f8e AG |
2871 | static int nla_put_drbd_cfg_context(struct sk_buff *skb, |
2872 | struct drbd_resource *resource, | |
2873 | struct drbd_connection *connection, | |
2874 | struct drbd_device *device) | |
b411b363 | 2875 | { |
543cc10b LE |
2876 | struct nlattr *nla; |
2877 | nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); | |
2878 | if (!nla) | |
2879 | goto nla_put_failure; | |
251b8f8e AG |
2880 | if (device && |
2881 | nla_put_u32(skb, T_ctx_volume, device->vnr)) | |
26ec9287 | 2882 | goto nla_put_failure; |
f597f6b8 | 2883 | if (nla_put_string(skb, T_ctx_resource_name, resource->name)) |
26ec9287 | 2884 | goto nla_put_failure; |
251b8f8e AG |
2885 | if (connection) { |
2886 | if (connection->my_addr_len && | |
2887 | nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr)) | |
2888 | goto nla_put_failure; | |
2889 | if (connection->peer_addr_len && | |
2890 | nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr)) | |
2891 | goto nla_put_failure; | |
2892 | } | |
543cc10b LE |
2893 | nla_nest_end(skb, nla); |
2894 | return 0; | |
b411b363 | 2895 | |
543cc10b LE |
2896 | nla_put_failure: |
2897 | if (nla) | |
2898 | nla_nest_cancel(skb, nla); | |
2899 | return -EMSGSIZE; | |
2900 | } | |
b411b363 | 2901 | |
251b8f8e AG |
2902 | /* |
2903 | * Return the connection of @resource if @resource has exactly one connection. | |
2904 | */ | |
2905 | static struct drbd_connection *the_only_connection(struct drbd_resource *resource) | |
2906 | { | |
2907 | struct list_head *connections = &resource->connections; | |
2908 | ||
2909 | if (list_empty(connections) || connections->next->next != connections) | |
2910 | return NULL; | |
2911 | return list_first_entry(&resource->connections, struct drbd_connection, connections); | |
2912 | } | |
2913 | ||
2914 | int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device, | |
3b98c0c2 | 2915 | const struct sib_info *sib) |
b411b363 | 2916 | { |
251b8f8e | 2917 | struct drbd_resource *resource = device->resource; |
3b98c0c2 LE |
2918 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
2919 | struct nlattr *nla; | |
2920 | int got_ldev; | |
3b98c0c2 LE |
2921 | int err = 0; |
2922 | int exclude_sensitive; | |
2923 | ||
2924 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
2925 | * to. So we better exclude_sensitive information. | |
2926 | * | |
2927 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
2928 | * in the context of the requesting user process. Exclude sensitive | |
2929 | * information, unless current has superuser. | |
2930 | * | |
2931 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
2932 | * relies on the current implementation of netlink_dump(), which | |
2933 | * executes the dump callback successively from netlink_recvmsg(), | |
2934 | * always in the context of the receiving process */ | |
2935 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
2936 | ||
b30ab791 | 2937 | got_ldev = get_ldev(device); |
3b98c0c2 LE |
2938 | |
2939 | /* We need to add connection name and volume number information still. | |
2940 | * Minor number is in drbd_genlmsghdr. */ | |
251b8f8e | 2941 | if (nla_put_drbd_cfg_context(skb, resource, the_only_connection(resource), device)) |
3b98c0c2 | 2942 | goto nla_put_failure; |
3b98c0c2 | 2943 | |
eb6bea67 | 2944 | if (res_opts_to_skb(skb, &device->resource->res_opts, exclude_sensitive)) |
f399002e LE |
2945 | goto nla_put_failure; |
2946 | ||
daeda1cc | 2947 | rcu_read_lock(); |
f9eb7bf4 AG |
2948 | if (got_ldev) { |
2949 | struct disk_conf *disk_conf; | |
44ed167d | 2950 | |
b30ab791 | 2951 | disk_conf = rcu_dereference(device->ldev->disk_conf); |
f9eb7bf4 AG |
2952 | err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive); |
2953 | } | |
2954 | if (!err) { | |
2955 | struct net_conf *nc; | |
2956 | ||
a6b32bc3 | 2957 | nc = rcu_dereference(first_peer_device(device)->connection->net_conf); |
f9eb7bf4 AG |
2958 | if (nc) |
2959 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
2960 | } | |
44ed167d PR |
2961 | rcu_read_unlock(); |
2962 | if (err) | |
2963 | goto nla_put_failure; | |
3b98c0c2 | 2964 | |
3b98c0c2 LE |
2965 | nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); |
2966 | if (!nla) | |
2967 | goto nla_put_failure; | |
26ec9287 | 2968 | if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) || |
b30ab791 AG |
2969 | nla_put_u32(skb, T_current_state, device->state.i) || |
2970 | nla_put_u64(skb, T_ed_uuid, device->ed_uuid) || | |
2971 | nla_put_u64(skb, T_capacity, drbd_get_capacity(device->this_bdev)) || | |
2972 | nla_put_u64(skb, T_send_cnt, device->send_cnt) || | |
2973 | nla_put_u64(skb, T_recv_cnt, device->recv_cnt) || | |
2974 | nla_put_u64(skb, T_read_cnt, device->read_cnt) || | |
2975 | nla_put_u64(skb, T_writ_cnt, device->writ_cnt) || | |
2976 | nla_put_u64(skb, T_al_writ_cnt, device->al_writ_cnt) || | |
2977 | nla_put_u64(skb, T_bm_writ_cnt, device->bm_writ_cnt) || | |
2978 | nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&device->ap_bio_cnt)) || | |
2979 | nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&device->ap_pending_cnt)) || | |
2980 | nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&device->rs_pending_cnt))) | |
26ec9287 | 2981 | goto nla_put_failure; |
3b98c0c2 LE |
2982 | |
2983 | if (got_ldev) { | |
39a1aa7f | 2984 | int err; |
b411b363 | 2985 | |
b30ab791 AG |
2986 | spin_lock_irq(&device->ldev->md.uuid_lock); |
2987 | err = nla_put(skb, T_uuids, sizeof(si->uuids), device->ldev->md.uuid); | |
2988 | spin_unlock_irq(&device->ldev->md.uuid_lock); | |
39a1aa7f PR |
2989 | |
2990 | if (err) | |
2991 | goto nla_put_failure; | |
2992 | ||
b30ab791 AG |
2993 | if (nla_put_u32(skb, T_disk_flags, device->ldev->md.flags) || |
2994 | nla_put_u64(skb, T_bits_total, drbd_bm_bits(device)) || | |
2995 | nla_put_u64(skb, T_bits_oos, drbd_bm_total_weight(device))) | |
26ec9287 | 2996 | goto nla_put_failure; |
b30ab791 AG |
2997 | if (C_SYNC_SOURCE <= device->state.conn && |
2998 | C_PAUSED_SYNC_T >= device->state.conn) { | |
2999 | if (nla_put_u64(skb, T_bits_rs_total, device->rs_total) || | |
3000 | nla_put_u64(skb, T_bits_rs_failed, device->rs_failed)) | |
26ec9287 | 3001 | goto nla_put_failure; |
3b98c0c2 | 3002 | } |
b411b363 | 3003 | } |
b411b363 | 3004 | |
3b98c0c2 LE |
3005 | if (sib) { |
3006 | switch(sib->sib_reason) { | |
3007 | case SIB_SYNC_PROGRESS: | |
3008 | case SIB_GET_STATUS_REPLY: | |
3009 | break; | |
3010 | case SIB_STATE_CHANGE: | |
26ec9287 AG |
3011 | if (nla_put_u32(skb, T_prev_state, sib->os.i) || |
3012 | nla_put_u32(skb, T_new_state, sib->ns.i)) | |
3013 | goto nla_put_failure; | |
3b98c0c2 LE |
3014 | break; |
3015 | case SIB_HELPER_POST: | |
26ec9287 AG |
3016 | if (nla_put_u32(skb, T_helper_exit_code, |
3017 | sib->helper_exit_code)) | |
3018 | goto nla_put_failure; | |
3b98c0c2 LE |
3019 | /* fall through */ |
3020 | case SIB_HELPER_PRE: | |
26ec9287 AG |
3021 | if (nla_put_string(skb, T_helper, sib->helper_name)) |
3022 | goto nla_put_failure; | |
3b98c0c2 LE |
3023 | break; |
3024 | } | |
b411b363 | 3025 | } |
3b98c0c2 | 3026 | nla_nest_end(skb, nla); |
b411b363 | 3027 | |
3b98c0c2 LE |
3028 | if (0) |
3029 | nla_put_failure: | |
3030 | err = -EMSGSIZE; | |
3031 | if (got_ldev) | |
b30ab791 | 3032 | put_ldev(device); |
3b98c0c2 | 3033 | return err; |
b411b363 PR |
3034 | } |
3035 | ||
3b98c0c2 | 3036 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3037 | { |
a910b123 | 3038 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
3039 | enum drbd_ret_code retcode; |
3040 | int err; | |
b411b363 | 3041 | |
a910b123 | 3042 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3043 | if (!adm_ctx.reply_skb) |
3044 | return retcode; | |
3045 | if (retcode != NO_ERROR) | |
3046 | goto out; | |
b411b363 | 3047 | |
b30ab791 | 3048 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.device, NULL); |
3b98c0c2 LE |
3049 | if (err) { |
3050 | nlmsg_free(adm_ctx.reply_skb); | |
3051 | return err; | |
b411b363 | 3052 | } |
3b98c0c2 | 3053 | out: |
a910b123 | 3054 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3055 | return 0; |
b411b363 PR |
3056 | } |
3057 | ||
4b7a530f | 3058 | static int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 3059 | { |
b30ab791 | 3060 | struct drbd_device *device; |
3b98c0c2 | 3061 | struct drbd_genlmsghdr *dh; |
77c556f6 AG |
3062 | struct drbd_resource *pos = (struct drbd_resource *)cb->args[0]; |
3063 | struct drbd_resource *resource = NULL; | |
77c556f6 | 3064 | struct drbd_resource *tmp; |
543cc10b LE |
3065 | unsigned volume = cb->args[1]; |
3066 | ||
3067 | /* Open coded, deferred, iteration: | |
77c556f6 | 3068 | * for_each_resource_safe(resource, tmp, &drbd_resources) { |
251b8f8e AG |
3069 | * connection = "first connection of resource or undefined"; |
3070 | * idr_for_each_entry(&resource->devices, device, i) { | |
543cc10b LE |
3071 | * ... |
3072 | * } | |
3073 | * } | |
77c556f6 | 3074 | * where resource is cb->args[0]; |
543cc10b LE |
3075 | * and i is cb->args[1]; |
3076 | * | |
71932efc LE |
3077 | * cb->args[2] indicates if we shall loop over all resources, |
3078 | * or just dump all volumes of a single resource. | |
3079 | * | |
3b98c0c2 LE |
3080 | * This may miss entries inserted after this dump started, |
3081 | * or entries deleted before they are reached. | |
543cc10b | 3082 | * |
b30ab791 | 3083 | * We need to make sure the device won't disappear while |
543cc10b LE |
3084 | * we are looking at it, and revalidate our iterators |
3085 | * on each iteration. | |
3086 | */ | |
b411b363 | 3087 | |
05a10ec7 | 3088 | /* synchronize with conn_create()/drbd_destroy_connection() */ |
c141ebda | 3089 | rcu_read_lock(); |
543cc10b | 3090 | /* revalidate iterator position */ |
77c556f6 | 3091 | for_each_resource_rcu(tmp, &drbd_resources) { |
543cc10b LE |
3092 | if (pos == NULL) { |
3093 | /* first iteration */ | |
3094 | pos = tmp; | |
77c556f6 | 3095 | resource = pos; |
543cc10b LE |
3096 | break; |
3097 | } | |
3098 | if (tmp == pos) { | |
77c556f6 | 3099 | resource = pos; |
543cc10b LE |
3100 | break; |
3101 | } | |
b411b363 | 3102 | } |
77c556f6 AG |
3103 | if (resource) { |
3104 | next_resource: | |
251b8f8e AG |
3105 | device = idr_get_next(&resource->devices, &volume); |
3106 | if (!device) { | |
77c556f6 AG |
3107 | /* No more volumes to dump on this resource. |
3108 | * Advance resource iterator. */ | |
3109 | pos = list_entry_rcu(resource->resources.next, | |
3110 | struct drbd_resource, resources); | |
3111 | /* Did we dump any volume of this resource yet? */ | |
543cc10b | 3112 | if (volume != 0) { |
71932efc LE |
3113 | /* If we reached the end of the list, |
3114 | * or only a single resource dump was requested, | |
3115 | * we are done. */ | |
77c556f6 | 3116 | if (&pos->resources == &drbd_resources || cb->args[2]) |
71932efc | 3117 | goto out; |
543cc10b | 3118 | volume = 0; |
77c556f6 AG |
3119 | resource = pos; |
3120 | goto next_resource; | |
543cc10b LE |
3121 | } |
3122 | } | |
3123 | ||
98683650 | 3124 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, |
3b98c0c2 LE |
3125 | cb->nlh->nlmsg_seq, &drbd_genl_family, |
3126 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
3127 | if (!dh) | |
543cc10b LE |
3128 | goto out; |
3129 | ||
251b8f8e | 3130 | if (!device) { |
bde89a9e | 3131 | /* This is a connection without a single volume. |
367d675d LE |
3132 | * Suprisingly enough, it may have a network |
3133 | * configuration. */ | |
251b8f8e AG |
3134 | struct drbd_connection *connection; |
3135 | ||
543cc10b LE |
3136 | dh->minor = -1U; |
3137 | dh->ret_code = NO_ERROR; | |
251b8f8e AG |
3138 | connection = the_only_connection(resource); |
3139 | if (nla_put_drbd_cfg_context(skb, resource, connection, NULL)) | |
367d675d | 3140 | goto cancel; |
251b8f8e AG |
3141 | if (connection) { |
3142 | struct net_conf *nc; | |
3143 | ||
3144 | nc = rcu_dereference(connection->net_conf); | |
3145 | if (nc && net_conf_to_skb(skb, nc, 1) != 0) | |
3146 | goto cancel; | |
3147 | } | |
367d675d | 3148 | goto done; |
543cc10b | 3149 | } |
b411b363 | 3150 | |
0b0ba1ef | 3151 | D_ASSERT(device, device->vnr == volume); |
251b8f8e | 3152 | D_ASSERT(device, device->resource == resource); |
3b98c0c2 | 3153 | |
b30ab791 | 3154 | dh->minor = device_to_minor(device); |
3b98c0c2 LE |
3155 | dh->ret_code = NO_ERROR; |
3156 | ||
b30ab791 | 3157 | if (nla_put_status_info(skb, device, NULL)) { |
367d675d | 3158 | cancel: |
3b98c0c2 | 3159 | genlmsg_cancel(skb, dh); |
543cc10b | 3160 | goto out; |
3b98c0c2 | 3161 | } |
367d675d | 3162 | done: |
3b98c0c2 | 3163 | genlmsg_end(skb, dh); |
bde89a9e | 3164 | } |
b411b363 | 3165 | |
543cc10b | 3166 | out: |
c141ebda | 3167 | rcu_read_unlock(); |
543cc10b | 3168 | /* where to start the next iteration */ |
bde89a9e | 3169 | cb->args[0] = (long)pos; |
77c556f6 | 3170 | cb->args[1] = (pos == resource) ? volume + 1 : 0; |
b411b363 | 3171 | |
77c556f6 | 3172 | /* No more resources/volumes/minors found results in an empty skb. |
543cc10b | 3173 | * Which will terminate the dump. */ |
3b98c0c2 | 3174 | return skb->len; |
b411b363 PR |
3175 | } |
3176 | ||
71932efc LE |
3177 | /* |
3178 | * Request status of all resources, or of all volumes within a single resource. | |
3179 | * | |
3180 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
3181 | * Which means we cannot use the family->attrbuf or other such members, because | |
3182 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
3183 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
3184 | * | |
3185 | * Once things are setup properly, we call into get_one_status(). | |
b411b363 | 3186 | */ |
71932efc | 3187 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 3188 | { |
71932efc LE |
3189 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; |
3190 | struct nlattr *nla; | |
7c3063cc | 3191 | const char *resource_name; |
4bc76048 | 3192 | struct drbd_resource *resource; |
7c3063cc | 3193 | int maxtype; |
71932efc LE |
3194 | |
3195 | /* Is this a followup call? */ | |
3196 | if (cb->args[0]) { | |
3197 | /* ... of a single resource dump, | |
3198 | * and the resource iterator has been advanced already? */ | |
3199 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
3200 | return 0; /* DONE. */ | |
3201 | goto dump; | |
3202 | } | |
3203 | ||
3204 | /* First call (from netlink_dump_start). We need to figure out | |
3205 | * which resource(s) the user wants us to dump. */ | |
3206 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
3207 | nlmsg_attrlen(cb->nlh, hdrlen), | |
3208 | DRBD_NLA_CFG_CONTEXT); | |
3209 | ||
3210 | /* No explicit context given. Dump all. */ | |
3211 | if (!nla) | |
3212 | goto dump; | |
7c3063cc AG |
3213 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
3214 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
3215 | if (IS_ERR(nla)) | |
3216 | return PTR_ERR(nla); | |
71932efc LE |
3217 | /* context given, but no name present? */ |
3218 | if (!nla) | |
3219 | return -EINVAL; | |
7c3063cc | 3220 | resource_name = nla_data(nla); |
4bc76048 AG |
3221 | if (!*resource_name) |
3222 | return -ENODEV; | |
3223 | resource = drbd_find_resource(resource_name); | |
3224 | if (!resource) | |
71932efc LE |
3225 | return -ENODEV; |
3226 | ||
4bc76048 | 3227 | kref_put(&resource->kref, drbd_destroy_resource); /* get_one_status() revalidates the resource */ |
0ace9dfa | 3228 | |
71932efc | 3229 | /* prime iterators, and set "filter" mode mark: |
bde89a9e | 3230 | * only dump this connection. */ |
4bc76048 | 3231 | cb->args[0] = (long)resource; |
71932efc | 3232 | /* cb->args[1] = 0; passed in this way. */ |
4bc76048 | 3233 | cb->args[2] = (long)resource; |
71932efc LE |
3234 | |
3235 | dump: | |
3236 | return get_one_status(skb, cb); | |
3237 | } | |
b411b363 | 3238 | |
3b98c0c2 | 3239 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3240 | { |
a910b123 | 3241 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
3242 | enum drbd_ret_code retcode; |
3243 | struct timeout_parms tp; | |
3244 | int err; | |
b411b363 | 3245 | |
a910b123 | 3246 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3247 | if (!adm_ctx.reply_skb) |
3248 | return retcode; | |
3249 | if (retcode != NO_ERROR) | |
3250 | goto out; | |
b411b363 | 3251 | |
3b98c0c2 | 3252 | tp.timeout_type = |
b30ab791 AG |
3253 | adm_ctx.device->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : |
3254 | test_bit(USE_DEGR_WFC_T, &adm_ctx.device->flags) ? UT_DEGRADED : | |
3b98c0c2 | 3255 | UT_DEFAULT; |
b411b363 | 3256 | |
3b98c0c2 LE |
3257 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
3258 | if (err) { | |
3259 | nlmsg_free(adm_ctx.reply_skb); | |
3260 | return err; | |
3261 | } | |
3262 | out: | |
a910b123 | 3263 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3264 | return 0; |
b411b363 PR |
3265 | } |
3266 | ||
3b98c0c2 | 3267 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3268 | { |
a910b123 | 3269 | struct drbd_config_context adm_ctx; |
b30ab791 | 3270 | struct drbd_device *device; |
3b98c0c2 | 3271 | enum drbd_ret_code retcode; |
58ffa580 | 3272 | struct start_ov_parms parms; |
b411b363 | 3273 | |
a910b123 | 3274 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3275 | if (!adm_ctx.reply_skb) |
3276 | return retcode; | |
3277 | if (retcode != NO_ERROR) | |
3278 | goto out; | |
873b0d5f | 3279 | |
b30ab791 | 3280 | device = adm_ctx.device; |
58ffa580 LE |
3281 | |
3282 | /* resume from last known position, if possible */ | |
b30ab791 | 3283 | parms.ov_start_sector = device->ov_start_sector; |
58ffa580 | 3284 | parms.ov_stop_sector = ULLONG_MAX; |
3b98c0c2 | 3285 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { |
f399002e | 3286 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
3287 | if (err) { |
3288 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 3289 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
3290 | goto out; |
3291 | } | |
b411b363 | 3292 | } |
9e276872 LE |
3293 | mutex_lock(&adm_ctx.resource->adm_mutex); |
3294 | ||
58ffa580 | 3295 | /* w_make_ov_request expects position to be aligned */ |
b30ab791 AG |
3296 | device->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1); |
3297 | device->ov_stop_sector = parms.ov_stop_sector; | |
873b0d5f LE |
3298 | |
3299 | /* If there is still bitmap IO pending, e.g. previous resync or verify | |
3300 | * just being finished, wait for it before requesting a new resync. */ | |
b30ab791 AG |
3301 | drbd_suspend_io(device); |
3302 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
3303 | retcode = drbd_request_state(device, NS(conn, C_VERIFY_S)); | |
3304 | drbd_resume_io(device); | |
9e276872 LE |
3305 | |
3306 | mutex_unlock(&adm_ctx.resource->adm_mutex); | |
3b98c0c2 | 3307 | out: |
a910b123 | 3308 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3309 | return 0; |
3310 | } | |
3311 | ||
3312 | ||
3b98c0c2 | 3313 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3314 | { |
a910b123 | 3315 | struct drbd_config_context adm_ctx; |
b30ab791 | 3316 | struct drbd_device *device; |
3b98c0c2 | 3317 | enum drbd_ret_code retcode; |
b411b363 PR |
3318 | int skip_initial_sync = 0; |
3319 | int err; | |
3b98c0c2 | 3320 | struct new_c_uuid_parms args; |
b411b363 | 3321 | |
a910b123 | 3322 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3323 | if (!adm_ctx.reply_skb) |
3324 | return retcode; | |
3325 | if (retcode != NO_ERROR) | |
3326 | goto out_nolock; | |
b411b363 | 3327 | |
b30ab791 | 3328 | device = adm_ctx.device; |
3b98c0c2 LE |
3329 | memset(&args, 0, sizeof(args)); |
3330 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 3331 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
3332 | if (err) { |
3333 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 3334 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
3335 | goto out_nolock; |
3336 | } | |
b411b363 PR |
3337 | } |
3338 | ||
9e276872 | 3339 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 3340 | mutex_lock(device->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 | 3341 | |
b30ab791 | 3342 | if (!get_ldev(device)) { |
b411b363 PR |
3343 | retcode = ERR_NO_DISK; |
3344 | goto out; | |
3345 | } | |
3346 | ||
3347 | /* this is "skip initial sync", assume to be clean */ | |
a6b32bc3 AG |
3348 | if (device->state.conn == C_CONNECTED && |
3349 | first_peer_device(device)->connection->agreed_pro_version >= 90 && | |
b30ab791 | 3350 | device->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
d0180171 | 3351 | drbd_info(device, "Preparing to skip initial sync\n"); |
b411b363 | 3352 | skip_initial_sync = 1; |
b30ab791 | 3353 | } else if (device->state.conn != C_STANDALONE) { |
b411b363 PR |
3354 | retcode = ERR_CONNECTED; |
3355 | goto out_dec; | |
3356 | } | |
3357 | ||
b30ab791 AG |
3358 | drbd_uuid_set(device, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ |
3359 | drbd_uuid_new_current(device); /* New current, previous to UI_BITMAP */ | |
b411b363 PR |
3360 | |
3361 | if (args.clear_bm) { | |
b30ab791 | 3362 | err = drbd_bitmap_io(device, &drbd_bmio_clear_n_write, |
20ceb2b2 | 3363 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); |
b411b363 | 3364 | if (err) { |
d0180171 | 3365 | drbd_err(device, "Writing bitmap failed with %d\n", err); |
b411b363 PR |
3366 | retcode = ERR_IO_MD_DISK; |
3367 | } | |
3368 | if (skip_initial_sync) { | |
69a22773 | 3369 | drbd_send_uuids_skip_initial_sync(first_peer_device(device)); |
b30ab791 AG |
3370 | _drbd_uuid_set(device, UI_BITMAP, 0); |
3371 | drbd_print_uuids(device, "cleared bitmap UUID"); | |
0500813f | 3372 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 | 3373 | _drbd_set_state(_NS2(device, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
b411b363 | 3374 | CS_VERBOSE, NULL); |
0500813f | 3375 | spin_unlock_irq(&device->resource->req_lock); |
b411b363 PR |
3376 | } |
3377 | } | |
3378 | ||
b30ab791 | 3379 | drbd_md_sync(device); |
b411b363 | 3380 | out_dec: |
b30ab791 | 3381 | put_ldev(device); |
b411b363 | 3382 | out: |
b30ab791 | 3383 | mutex_unlock(device->state_mutex); |
9e276872 | 3384 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3385 | out_nolock: |
a910b123 | 3386 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3387 | return 0; |
3388 | } | |
3389 | ||
3b98c0c2 | 3390 | static enum drbd_ret_code |
a910b123 | 3391 | drbd_check_resource_name(struct drbd_config_context *adm_ctx) |
b411b363 | 3392 | { |
a910b123 | 3393 | const char *name = adm_ctx->resource_name; |
3b98c0c2 | 3394 | if (!name || !name[0]) { |
a910b123 | 3395 | drbd_msg_put_info(adm_ctx->reply_skb, "resource name missing"); |
3b98c0c2 | 3396 | return ERR_MANDATORY_TAG; |
b411b363 | 3397 | } |
3b98c0c2 LE |
3398 | /* if we want to use these in sysfs/configfs/debugfs some day, |
3399 | * we must not allow slashes */ | |
3400 | if (strchr(name, '/')) { | |
a910b123 | 3401 | drbd_msg_put_info(adm_ctx->reply_skb, "invalid resource name"); |
3b98c0c2 | 3402 | return ERR_INVALID_REQUEST; |
b411b363 | 3403 | } |
3b98c0c2 | 3404 | return NO_ERROR; |
774b3055 | 3405 | } |
b411b363 | 3406 | |
789c1b62 | 3407 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3408 | { |
a910b123 | 3409 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 3410 | enum drbd_ret_code retcode; |
afbbfa88 AG |
3411 | struct res_opts res_opts; |
3412 | int err; | |
b411b363 | 3413 | |
a910b123 | 3414 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, 0); |
3b98c0c2 LE |
3415 | if (!adm_ctx.reply_skb) |
3416 | return retcode; | |
3417 | if (retcode != NO_ERROR) | |
3418 | goto out; | |
b411b363 | 3419 | |
afbbfa88 AG |
3420 | set_res_opts_defaults(&res_opts); |
3421 | err = res_opts_from_attrs(&res_opts, info); | |
3422 | if (err && err != -ENOMSG) { | |
3423 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 3424 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
afbbfa88 | 3425 | goto out; |
b411b363 PR |
3426 | } |
3427 | ||
a910b123 | 3428 | retcode = drbd_check_resource_name(&adm_ctx); |
3b98c0c2 LE |
3429 | if (retcode != NO_ERROR) |
3430 | goto out; | |
b411b363 | 3431 | |
5c661042 | 3432 | if (adm_ctx.resource) { |
38f19616 LE |
3433 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
3434 | retcode = ERR_INVALID_REQUEST; | |
a910b123 | 3435 | drbd_msg_put_info(adm_ctx.reply_skb, "resource exists"); |
38f19616 LE |
3436 | } |
3437 | /* else: still NO_ERROR */ | |
3b98c0c2 | 3438 | goto out; |
b411b363 | 3439 | } |
b411b363 | 3440 | |
9e276872 | 3441 | /* not yet safe for genl_family.parallel_ops */ |
afbbfa88 | 3442 | if (!conn_create(adm_ctx.resource_name, &res_opts)) |
b411b363 | 3443 | retcode = ERR_NOMEM; |
3b98c0c2 | 3444 | out: |
a910b123 | 3445 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3446 | return 0; |
b411b363 PR |
3447 | } |
3448 | ||
05a10ec7 | 3449 | int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3450 | { |
a910b123 | 3451 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
3452 | struct drbd_genlmsghdr *dh = info->userhdr; |
3453 | enum drbd_ret_code retcode; | |
b411b363 | 3454 | |
a910b123 | 3455 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
3456 | if (!adm_ctx.reply_skb) |
3457 | return retcode; | |
3458 | if (retcode != NO_ERROR) | |
3459 | goto out; | |
b411b363 | 3460 | |
f2257a56 | 3461 | if (dh->minor > MINORMASK) { |
a910b123 | 3462 | drbd_msg_put_info(adm_ctx.reply_skb, "requested minor out of range"); |
3b98c0c2 LE |
3463 | retcode = ERR_INVALID_REQUEST; |
3464 | goto out; | |
b411b363 | 3465 | } |
0c8e36d9 | 3466 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
a910b123 | 3467 | drbd_msg_put_info(adm_ctx.reply_skb, "requested volume id out of range"); |
3b98c0c2 LE |
3468 | retcode = ERR_INVALID_REQUEST; |
3469 | goto out; | |
b411b363 | 3470 | } |
b411b363 | 3471 | |
38f19616 | 3472 | /* drbd_adm_prepare made sure already |
a6b32bc3 | 3473 | * that first_peer_device(device)->connection and device->vnr match the request. */ |
b30ab791 | 3474 | if (adm_ctx.device) { |
38f19616 LE |
3475 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) |
3476 | retcode = ERR_MINOR_EXISTS; | |
3477 | /* else: still NO_ERROR */ | |
3478 | goto out; | |
b411b363 | 3479 | } |
38f19616 | 3480 | |
9e276872 | 3481 | mutex_lock(&adm_ctx.resource->adm_mutex); |
a910b123 | 3482 | retcode = drbd_create_device(&adm_ctx, dh->minor); |
9e276872 | 3483 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3484 | out: |
a910b123 | 3485 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3486 | return 0; |
b411b363 PR |
3487 | } |
3488 | ||
05a10ec7 | 3489 | static enum drbd_ret_code adm_del_minor(struct drbd_device *device) |
b411b363 | 3490 | { |
b30ab791 AG |
3491 | if (device->state.disk == D_DISKLESS && |
3492 | /* no need to be device->state.conn == C_STANDALONE && | |
85f75dd7 LE |
3493 | * we may want to delete a minor from a live replication group. |
3494 | */ | |
b30ab791 AG |
3495 | device->state.role == R_SECONDARY) { |
3496 | _drbd_request_state(device, NS(conn, C_WF_REPORT_PARAMS), | |
369bea63 | 3497 | CS_VERBOSE + CS_WAIT_COMPLETE); |
f82795d6 | 3498 | drbd_delete_device(device); |
85f75dd7 LE |
3499 | return NO_ERROR; |
3500 | } else | |
3501 | return ERR_MINOR_CONFIGURED; | |
b411b363 PR |
3502 | } |
3503 | ||
05a10ec7 | 3504 | int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3505 | { |
a910b123 | 3506 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 3507 | enum drbd_ret_code retcode; |
b411b363 | 3508 | |
a910b123 | 3509 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3510 | if (!adm_ctx.reply_skb) |
3511 | return retcode; | |
3512 | if (retcode != NO_ERROR) | |
3513 | goto out; | |
b411b363 | 3514 | |
9e276872 | 3515 | mutex_lock(&adm_ctx.resource->adm_mutex); |
05a10ec7 | 3516 | retcode = adm_del_minor(adm_ctx.device); |
9e276872 | 3517 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
85f75dd7 | 3518 | out: |
a910b123 | 3519 | drbd_adm_finish(&adm_ctx, info, retcode); |
85f75dd7 | 3520 | return 0; |
b411b363 PR |
3521 | } |
3522 | ||
85f75dd7 | 3523 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3524 | { |
a910b123 | 3525 | struct drbd_config_context adm_ctx; |
b6f85ef9 AG |
3526 | struct drbd_resource *resource; |
3527 | struct drbd_connection *connection; | |
3528 | struct drbd_device *device; | |
f3dfa40a | 3529 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 | 3530 | unsigned i; |
b411b363 | 3531 | |
a910b123 | 3532 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
85f75dd7 LE |
3533 | if (!adm_ctx.reply_skb) |
3534 | return retcode; | |
3535 | if (retcode != NO_ERROR) | |
9e276872 | 3536 | goto finish; |
b411b363 | 3537 | |
b6f85ef9 | 3538 | resource = adm_ctx.resource; |
9e276872 | 3539 | mutex_lock(&resource->adm_mutex); |
85f75dd7 | 3540 | /* demote */ |
b6f85ef9 AG |
3541 | for_each_connection(connection, resource) { |
3542 | struct drbd_peer_device *peer_device; | |
3543 | ||
3544 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { | |
3545 | retcode = drbd_set_role(peer_device->device, R_SECONDARY, 0); | |
3546 | if (retcode < SS_SUCCESS) { | |
a910b123 | 3547 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to demote"); |
b6f85ef9 AG |
3548 | goto out; |
3549 | } | |
3550 | } | |
3551 | ||
3552 | retcode = conn_try_disconnect(connection, 0); | |
85f75dd7 | 3553 | if (retcode < SS_SUCCESS) { |
a910b123 | 3554 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to disconnect"); |
c141ebda | 3555 | goto out; |
85f75dd7 | 3556 | } |
b411b363 | 3557 | } |
b411b363 | 3558 | |
85f75dd7 | 3559 | /* detach */ |
b6f85ef9 AG |
3560 | idr_for_each_entry(&resource->devices, device, i) { |
3561 | retcode = adm_detach(device, 0); | |
27012382 | 3562 | if (retcode < SS_SUCCESS || retcode > NO_ERROR) { |
a910b123 | 3563 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to detach"); |
c141ebda | 3564 | goto out; |
85f75dd7 LE |
3565 | } |
3566 | } | |
b411b363 | 3567 | |
bde89a9e | 3568 | /* If we reach this, all volumes (of this connection) are Secondary, |
f3dfa40a | 3569 | * Disconnected, Diskless, aka Unconfigured. Make sure all threads have |
c141ebda | 3570 | * actually stopped, state handling only does drbd_thread_stop_nowait(). */ |
b6f85ef9 AG |
3571 | for_each_connection(connection, resource) |
3572 | drbd_thread_stop(&connection->worker); | |
b411b363 | 3573 | |
f3dfa40a | 3574 | /* Now, nothing can fail anymore */ |
b411b363 | 3575 | |
85f75dd7 | 3576 | /* delete volumes */ |
b6f85ef9 AG |
3577 | idr_for_each_entry(&resource->devices, device, i) { |
3578 | retcode = adm_del_minor(device); | |
85f75dd7 LE |
3579 | if (retcode != NO_ERROR) { |
3580 | /* "can not happen" */ | |
a910b123 | 3581 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to delete volume"); |
ef356262 | 3582 | goto out; |
85f75dd7 LE |
3583 | } |
3584 | } | |
b411b363 | 3585 | |
b6f85ef9 AG |
3586 | list_del_rcu(&resource->resources); |
3587 | synchronize_rcu(); | |
3588 | drbd_free_resource(resource); | |
3589 | retcode = NO_ERROR; | |
3b98c0c2 | 3590 | out: |
9e276872 LE |
3591 | mutex_unlock(&resource->adm_mutex); |
3592 | finish: | |
a910b123 | 3593 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3594 | return 0; |
b411b363 PR |
3595 | } |
3596 | ||
789c1b62 | 3597 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3598 | { |
a910b123 | 3599 | struct drbd_config_context adm_ctx; |
77c556f6 AG |
3600 | struct drbd_resource *resource; |
3601 | struct drbd_connection *connection; | |
3b98c0c2 | 3602 | enum drbd_ret_code retcode; |
b411b363 | 3603 | |
a910b123 | 3604 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
3605 | if (!adm_ctx.reply_skb) |
3606 | return retcode; | |
3607 | if (retcode != NO_ERROR) | |
9e276872 | 3608 | goto finish; |
b411b363 | 3609 | |
77c556f6 | 3610 | resource = adm_ctx.resource; |
9e276872 | 3611 | mutex_lock(&resource->adm_mutex); |
77c556f6 AG |
3612 | for_each_connection(connection, resource) { |
3613 | if (connection->cstate > C_STANDALONE) { | |
3614 | retcode = ERR_NET_CONFIGURED; | |
3615 | goto out; | |
3616 | } | |
3617 | } | |
3618 | if (!idr_is_empty(&resource->devices)) { | |
789c1b62 | 3619 | retcode = ERR_RES_IN_USE; |
77c556f6 | 3620 | goto out; |
b411b363 PR |
3621 | } |
3622 | ||
77c556f6 AG |
3623 | list_del_rcu(&resource->resources); |
3624 | for_each_connection(connection, resource) | |
3625 | drbd_thread_stop(&connection->worker); | |
3626 | synchronize_rcu(); | |
3627 | drbd_free_resource(resource); | |
3628 | retcode = NO_ERROR; | |
3b98c0c2 | 3629 | out: |
9e276872 LE |
3630 | mutex_unlock(&resource->adm_mutex); |
3631 | finish: | |
a910b123 | 3632 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3633 | return 0; |
3634 | } | |
3635 | ||
b30ab791 | 3636 | void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib) |
b411b363 | 3637 | { |
3b98c0c2 LE |
3638 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
3639 | struct sk_buff *msg; | |
3640 | struct drbd_genlmsghdr *d_out; | |
3641 | unsigned seq; | |
3642 | int err = -ENOMEM; | |
3643 | ||
3644 | seq = atomic_inc_return(&drbd_genl_seq); | |
3645 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
3646 | if (!msg) | |
3647 | goto failed; | |
3648 | ||
3649 | err = -EMSGSIZE; | |
3650 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
3651 | if (!d_out) /* cannot happen, but anyways. */ | |
3652 | goto nla_put_failure; | |
b30ab791 | 3653 | d_out->minor = device_to_minor(device); |
6f9b5f84 | 3654 | d_out->ret_code = NO_ERROR; |
3b98c0c2 | 3655 | |
b30ab791 | 3656 | if (nla_put_status_info(msg, device, sib)) |
3b98c0c2 LE |
3657 | goto nla_put_failure; |
3658 | genlmsg_end(msg, d_out); | |
3659 | err = drbd_genl_multicast_events(msg, 0); | |
3660 | /* msg has been consumed or freed in netlink_broadcast() */ | |
3661 | if (err && err != -ESRCH) | |
3662 | goto failed; | |
b411b363 | 3663 | |
3b98c0c2 | 3664 | return; |
b411b363 | 3665 | |
3b98c0c2 LE |
3666 | nla_put_failure: |
3667 | nlmsg_free(msg); | |
3668 | failed: | |
d0180171 | 3669 | drbd_err(device, "Error %d while broadcasting event. " |
3b98c0c2 LE |
3670 | "Event seq:%u sib_reason:%u\n", |
3671 | err, seq, sib->sib_reason); | |
b411b363 | 3672 | } |