Commit | Line | Data |
---|---|---|
c6ae4c04 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b411b363 PR |
2 | /* |
3 | drbd_nl.c | |
4 | ||
5 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. | |
6 | ||
7 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. | |
8 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. | |
9 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. | |
10 | ||
b411b363 PR |
11 | |
12 | */ | |
13 | ||
f88c5d90 LE |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
15 | ||
b411b363 PR |
16 | #include <linux/module.h> |
17 | #include <linux/drbd.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/fs.h> | |
20 | #include <linux/file.h> | |
21 | #include <linux/slab.h> | |
b411b363 PR |
22 | #include <linux/blkpg.h> |
23 | #include <linux/cpumask.h> | |
24 | #include "drbd_int.h" | |
a3603a6e | 25 | #include "drbd_protocol.h" |
265be2d0 | 26 | #include "drbd_req.h" |
a2972846 | 27 | #include "drbd_state_change.h" |
b411b363 | 28 | #include <asm/unaligned.h> |
b411b363 | 29 | #include <linux/drbd_limits.h> |
87f7be4c | 30 | #include <linux/kthread.h> |
b411b363 | 31 | |
3b98c0c2 LE |
32 | #include <net/genetlink.h> |
33 | ||
34 | /* .doit */ | |
35 | // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); | |
36 | // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); | |
37 | ||
05a10ec7 AG |
38 | int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info); |
39 | int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info); | |
3b98c0c2 | 40 | |
789c1b62 AG |
41 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info); |
42 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info); | |
85f75dd7 | 43 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
44 | |
45 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); | |
46 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 47 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
48 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); |
49 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 50 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
51 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); |
52 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); | |
53 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); | |
54 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); | |
55 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); | |
56 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); | |
57 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); | |
58 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); | |
59 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); | |
60 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); | |
61 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); | |
f399002e | 62 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info); |
3b98c0c2 LE |
63 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); |
64 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); | |
65 | /* .dumpit */ | |
66 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); | |
a55bbd37 AG |
67 | int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb); |
68 | int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb); | |
69 | int drbd_adm_dump_devices_done(struct netlink_callback *cb); | |
70 | int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb); | |
71 | int drbd_adm_dump_connections_done(struct netlink_callback *cb); | |
72 | int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb); | |
73 | int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb); | |
a2972846 | 74 | int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb); |
3b98c0c2 LE |
75 | |
76 | #include <linux/drbd_genl_api.h> | |
01b39b50 | 77 | #include "drbd_nla.h" |
3b98c0c2 LE |
78 | #include <linux/genl_magic_func.h> |
79 | ||
a2972846 AG |
80 | static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ |
81 | static atomic_t notify_genl_seq = ATOMIC_INIT(2); /* two. */ | |
82 | ||
83 | DEFINE_MUTEX(notification_mutex); | |
84 | ||
3b98c0c2 | 85 | /* used blkdev_get_by_path, to claim our meta data device(s) */ |
b411b363 PR |
86 | static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; |
87 | ||
3b98c0c2 LE |
88 | static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) |
89 | { | |
90 | genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); | |
91 | if (genlmsg_reply(skb, info)) | |
f88c5d90 | 92 | pr_err("error sending genl reply\n"); |
b411b363 | 93 | } |
3b98c0c2 LE |
94 | |
95 | /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only | |
96 | * reason it could fail was no space in skb, and there are 4k available. */ | |
f221f4bc | 97 | static int drbd_msg_put_info(struct sk_buff *skb, const char *info) |
3b98c0c2 | 98 | { |
3b98c0c2 LE |
99 | struct nlattr *nla; |
100 | int err = -EMSGSIZE; | |
101 | ||
102 | if (!info || !info[0]) | |
103 | return 0; | |
104 | ||
ae0be8de | 105 | nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_REPLY); |
3b98c0c2 LE |
106 | if (!nla) |
107 | return err; | |
108 | ||
109 | err = nla_put_string(skb, T_info_text, info); | |
110 | if (err) { | |
111 | nla_nest_cancel(skb, nla); | |
112 | return err; | |
113 | } else | |
114 | nla_nest_end(skb, nla); | |
115 | return 0; | |
b411b363 PR |
116 | } |
117 | ||
4ef2a4f4 LE |
118 | __printf(2, 3) |
119 | static int drbd_msg_sprintf_info(struct sk_buff *skb, const char *fmt, ...) | |
120 | { | |
121 | va_list args; | |
122 | struct nlattr *nla, *txt; | |
123 | int err = -EMSGSIZE; | |
124 | int len; | |
125 | ||
ae0be8de | 126 | nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_REPLY); |
4ef2a4f4 LE |
127 | if (!nla) |
128 | return err; | |
129 | ||
130 | txt = nla_reserve(skb, T_info_text, 256); | |
131 | if (!txt) { | |
132 | nla_nest_cancel(skb, nla); | |
133 | return err; | |
134 | } | |
135 | va_start(args, fmt); | |
136 | len = vscnprintf(nla_data(txt), 256, fmt, args); | |
137 | va_end(args); | |
138 | ||
139 | /* maybe: retry with larger reserve, if truncated */ | |
140 | txt->nla_len = nla_attr_size(len+1); | |
141 | nlmsg_trim(skb, (char*)txt + NLA_ALIGN(txt->nla_len)); | |
142 | nla_nest_end(skb, nla); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
3b98c0c2 LE |
147 | /* This would be a good candidate for a "pre_doit" hook, |
148 | * and per-family private info->pointers. | |
149 | * But we need to stay compatible with older kernels. | |
150 | * If it returns successfully, adm_ctx members are valid. | |
9e276872 LE |
151 | * |
152 | * At this point, we still rely on the global genl_lock(). | |
153 | * If we want to avoid that, and allow "genl_family.parallel_ops", we may need | |
154 | * to add additional synchronization against object destruction/modification. | |
3b98c0c2 LE |
155 | */ |
156 | #define DRBD_ADM_NEED_MINOR 1 | |
44e52cfa | 157 | #define DRBD_ADM_NEED_RESOURCE 2 |
089c075d | 158 | #define DRBD_ADM_NEED_CONNECTION 4 |
a910b123 LE |
159 | static int drbd_adm_prepare(struct drbd_config_context *adm_ctx, |
160 | struct sk_buff *skb, struct genl_info *info, unsigned flags) | |
3b98c0c2 LE |
161 | { |
162 | struct drbd_genlmsghdr *d_in = info->userhdr; | |
163 | const u8 cmd = info->genlhdr->cmd; | |
164 | int err; | |
165 | ||
a910b123 | 166 | memset(adm_ctx, 0, sizeof(*adm_ctx)); |
3b98c0c2 LE |
167 | |
168 | /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ | |
98683650 | 169 | if (cmd != DRBD_ADM_GET_STATUS && !capable(CAP_NET_ADMIN)) |
3b98c0c2 LE |
170 | return -EPERM; |
171 | ||
a910b123 LE |
172 | adm_ctx->reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
173 | if (!adm_ctx->reply_skb) { | |
1e2a2551 | 174 | err = -ENOMEM; |
3b98c0c2 | 175 | goto fail; |
1e2a2551 | 176 | } |
3b98c0c2 | 177 | |
a910b123 | 178 | adm_ctx->reply_dh = genlmsg_put_reply(adm_ctx->reply_skb, |
3b98c0c2 LE |
179 | info, &drbd_genl_family, 0, cmd); |
180 | /* put of a few bytes into a fresh skb of >= 4k will always succeed. | |
181 | * but anyways */ | |
a910b123 | 182 | if (!adm_ctx->reply_dh) { |
1e2a2551 | 183 | err = -ENOMEM; |
3b98c0c2 | 184 | goto fail; |
1e2a2551 | 185 | } |
3b98c0c2 | 186 | |
a910b123 LE |
187 | adm_ctx->reply_dh->minor = d_in->minor; |
188 | adm_ctx->reply_dh->ret_code = NO_ERROR; | |
3b98c0c2 | 189 | |
a910b123 | 190 | adm_ctx->volume = VOLUME_UNSPECIFIED; |
3b98c0c2 LE |
191 | if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { |
192 | struct nlattr *nla; | |
193 | /* parse and validate only */ | |
f399002e | 194 | err = drbd_cfg_context_from_attrs(NULL, info); |
3b98c0c2 LE |
195 | if (err) |
196 | goto fail; | |
197 | ||
198 | /* It was present, and valid, | |
199 | * copy it over to the reply skb. */ | |
a910b123 | 200 | err = nla_put_nohdr(adm_ctx->reply_skb, |
3b98c0c2 LE |
201 | info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, |
202 | info->attrs[DRBD_NLA_CFG_CONTEXT]); | |
203 | if (err) | |
204 | goto fail; | |
205 | ||
9e276872 | 206 | /* and assign stuff to the adm_ctx */ |
3b98c0c2 | 207 | nla = nested_attr_tb[__nla_type(T_ctx_volume)]; |
089c075d | 208 | if (nla) |
a910b123 | 209 | adm_ctx->volume = nla_get_u32(nla); |
7c3063cc | 210 | nla = nested_attr_tb[__nla_type(T_ctx_resource_name)]; |
3b98c0c2 | 211 | if (nla) |
a910b123 LE |
212 | adm_ctx->resource_name = nla_data(nla); |
213 | adm_ctx->my_addr = nested_attr_tb[__nla_type(T_ctx_my_addr)]; | |
214 | adm_ctx->peer_addr = nested_attr_tb[__nla_type(T_ctx_peer_addr)]; | |
215 | if ((adm_ctx->my_addr && | |
216 | nla_len(adm_ctx->my_addr) > sizeof(adm_ctx->connection->my_addr)) || | |
217 | (adm_ctx->peer_addr && | |
218 | nla_len(adm_ctx->peer_addr) > sizeof(adm_ctx->connection->peer_addr))) { | |
089c075d AG |
219 | err = -EINVAL; |
220 | goto fail; | |
221 | } | |
222 | } | |
3b98c0c2 | 223 | |
a910b123 LE |
224 | adm_ctx->minor = d_in->minor; |
225 | adm_ctx->device = minor_to_device(d_in->minor); | |
9e276872 LE |
226 | |
227 | /* We are protected by the global genl_lock(). | |
228 | * But we may explicitly drop it/retake it in drbd_adm_set_role(), | |
229 | * so make sure this object stays around. */ | |
230 | if (adm_ctx->device) | |
231 | kref_get(&adm_ctx->device->kref); | |
232 | ||
a910b123 LE |
233 | if (adm_ctx->resource_name) { |
234 | adm_ctx->resource = drbd_find_resource(adm_ctx->resource_name); | |
4bc76048 | 235 | } |
3b98c0c2 | 236 | |
a910b123 LE |
237 | if (!adm_ctx->device && (flags & DRBD_ADM_NEED_MINOR)) { |
238 | drbd_msg_put_info(adm_ctx->reply_skb, "unknown minor"); | |
3b98c0c2 LE |
239 | return ERR_MINOR_INVALID; |
240 | } | |
a910b123 LE |
241 | if (!adm_ctx->resource && (flags & DRBD_ADM_NEED_RESOURCE)) { |
242 | drbd_msg_put_info(adm_ctx->reply_skb, "unknown resource"); | |
243 | if (adm_ctx->resource_name) | |
a10f6b8a | 244 | return ERR_RES_NOT_KNOWN; |
3b98c0c2 LE |
245 | return ERR_INVALID_REQUEST; |
246 | } | |
247 | ||
089c075d | 248 | if (flags & DRBD_ADM_NEED_CONNECTION) { |
a910b123 LE |
249 | if (adm_ctx->resource) { |
250 | drbd_msg_put_info(adm_ctx->reply_skb, "no resource name expected"); | |
089c075d AG |
251 | return ERR_INVALID_REQUEST; |
252 | } | |
a910b123 LE |
253 | if (adm_ctx->device) { |
254 | drbd_msg_put_info(adm_ctx->reply_skb, "no minor number expected"); | |
089c075d AG |
255 | return ERR_INVALID_REQUEST; |
256 | } | |
a910b123 LE |
257 | if (adm_ctx->my_addr && adm_ctx->peer_addr) |
258 | adm_ctx->connection = conn_get_by_addrs(nla_data(adm_ctx->my_addr), | |
259 | nla_len(adm_ctx->my_addr), | |
260 | nla_data(adm_ctx->peer_addr), | |
261 | nla_len(adm_ctx->peer_addr)); | |
262 | if (!adm_ctx->connection) { | |
263 | drbd_msg_put_info(adm_ctx->reply_skb, "unknown connection"); | |
089c075d AG |
264 | return ERR_INVALID_REQUEST; |
265 | } | |
266 | } | |
267 | ||
3b98c0c2 | 268 | /* some more paranoia, if the request was over-determined */ |
a910b123 LE |
269 | if (adm_ctx->device && adm_ctx->resource && |
270 | adm_ctx->device->resource != adm_ctx->resource) { | |
4bc76048 | 271 | pr_warning("request: minor=%u, resource=%s; but that minor belongs to resource %s\n", |
a910b123 LE |
272 | adm_ctx->minor, adm_ctx->resource->name, |
273 | adm_ctx->device->resource->name); | |
274 | drbd_msg_put_info(adm_ctx->reply_skb, "minor exists in different resource"); | |
527f4b24 LE |
275 | return ERR_INVALID_REQUEST; |
276 | } | |
a910b123 LE |
277 | if (adm_ctx->device && |
278 | adm_ctx->volume != VOLUME_UNSPECIFIED && | |
279 | adm_ctx->volume != adm_ctx->device->vnr) { | |
3b98c0c2 | 280 | pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", |
a910b123 LE |
281 | adm_ctx->minor, adm_ctx->volume, |
282 | adm_ctx->device->vnr, | |
283 | adm_ctx->device->resource->name); | |
284 | drbd_msg_put_info(adm_ctx->reply_skb, "minor exists as different volume"); | |
3b98c0c2 LE |
285 | return ERR_INVALID_REQUEST; |
286 | } | |
0ace9dfa | 287 | |
9e276872 LE |
288 | /* still, provide adm_ctx->resource always, if possible. */ |
289 | if (!adm_ctx->resource) { | |
290 | adm_ctx->resource = adm_ctx->device ? adm_ctx->device->resource | |
291 | : adm_ctx->connection ? adm_ctx->connection->resource : NULL; | |
292 | if (adm_ctx->resource) | |
293 | kref_get(&adm_ctx->resource->kref); | |
294 | } | |
295 | ||
3b98c0c2 LE |
296 | return NO_ERROR; |
297 | ||
298 | fail: | |
a910b123 LE |
299 | nlmsg_free(adm_ctx->reply_skb); |
300 | adm_ctx->reply_skb = NULL; | |
1e2a2551 | 301 | return err; |
3b98c0c2 LE |
302 | } |
303 | ||
a910b123 LE |
304 | static int drbd_adm_finish(struct drbd_config_context *adm_ctx, |
305 | struct genl_info *info, int retcode) | |
3b98c0c2 | 306 | { |
9e276872 LE |
307 | if (adm_ctx->device) { |
308 | kref_put(&adm_ctx->device->kref, drbd_destroy_device); | |
309 | adm_ctx->device = NULL; | |
310 | } | |
a910b123 LE |
311 | if (adm_ctx->connection) { |
312 | kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection); | |
313 | adm_ctx->connection = NULL; | |
0ace9dfa | 314 | } |
a910b123 LE |
315 | if (adm_ctx->resource) { |
316 | kref_put(&adm_ctx->resource->kref, drbd_destroy_resource); | |
317 | adm_ctx->resource = NULL; | |
4bc76048 | 318 | } |
0ace9dfa | 319 | |
a910b123 | 320 | if (!adm_ctx->reply_skb) |
3b98c0c2 LE |
321 | return -ENOMEM; |
322 | ||
a910b123 LE |
323 | adm_ctx->reply_dh->ret_code = retcode; |
324 | drbd_adm_send_reply(adm_ctx->reply_skb, info); | |
3b98c0c2 LE |
325 | return 0; |
326 | } | |
b411b363 | 327 | |
bde89a9e | 328 | static void setup_khelper_env(struct drbd_connection *connection, char **envp) |
b411b363 | 329 | { |
6b75dced | 330 | char *afs; |
b411b363 | 331 | |
089c075d | 332 | /* FIXME: A future version will not allow this case. */ |
bde89a9e | 333 | if (connection->my_addr_len == 0 || connection->peer_addr_len == 0) |
089c075d AG |
334 | return; |
335 | ||
bde89a9e | 336 | switch (((struct sockaddr *)&connection->peer_addr)->sa_family) { |
089c075d AG |
337 | case AF_INET6: |
338 | afs = "ipv6"; | |
339 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", | |
bde89a9e | 340 | &((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr); |
b411b363 | 341 | break; |
089c075d AG |
342 | case AF_INET: |
343 | afs = "ipv4"; | |
344 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
bde89a9e | 345 | &((struct sockaddr_in *)&connection->peer_addr)->sin_addr); |
b411b363 | 346 | break; |
089c075d AG |
347 | default: |
348 | afs = "ssocks"; | |
349 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
bde89a9e | 350 | &((struct sockaddr_in *)&connection->peer_addr)->sin_addr); |
b411b363 | 351 | } |
089c075d | 352 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
6b75dced | 353 | } |
b411b363 | 354 | |
b30ab791 | 355 | int drbd_khelper(struct drbd_device *device, char *cmd) |
b411b363 PR |
356 | { |
357 | char *envp[] = { "HOME=/", | |
358 | "TERM=linux", | |
359 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
6b75dced PR |
360 | (char[20]) { }, /* address family */ |
361 | (char[60]) { }, /* address */ | |
b411b363 | 362 | NULL }; |
0982368b | 363 | char mb[14]; |
8ab761e1 | 364 | char *argv[] = {drbd_usermode_helper, cmd, mb, NULL }; |
a6b32bc3 | 365 | struct drbd_connection *connection = first_peer_device(device)->connection; |
6b75dced | 366 | struct sib_info sib; |
b411b363 PR |
367 | int ret; |
368 | ||
bde89a9e AG |
369 | if (current == connection->worker.task) |
370 | set_bit(CALLBACK_PENDING, &connection->flags); | |
c2ba686f | 371 | |
0982368b | 372 | snprintf(mb, 14, "minor-%d", device_to_minor(device)); |
bde89a9e | 373 | setup_khelper_env(connection, envp); |
b411b363 | 374 | |
1090c056 LE |
375 | /* The helper may take some time. |
376 | * write out any unsynced meta data changes now */ | |
b30ab791 | 377 | drbd_md_sync(device); |
1090c056 | 378 | |
8ab761e1 | 379 | drbd_info(device, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, mb); |
3b98c0c2 LE |
380 | sib.sib_reason = SIB_HELPER_PRE; |
381 | sib.helper_name = cmd; | |
b30ab791 | 382 | drbd_bcast_event(device, &sib); |
a2972846 | 383 | notify_helper(NOTIFY_CALL, device, connection, cmd, 0); |
8ab761e1 | 384 | ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC); |
b411b363 | 385 | if (ret) |
d0180171 | 386 | drbd_warn(device, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 387 | drbd_usermode_helper, cmd, mb, |
b411b363 PR |
388 | (ret >> 8) & 0xff, ret); |
389 | else | |
d0180171 | 390 | drbd_info(device, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 391 | drbd_usermode_helper, cmd, mb, |
b411b363 | 392 | (ret >> 8) & 0xff, ret); |
3b98c0c2 LE |
393 | sib.sib_reason = SIB_HELPER_POST; |
394 | sib.helper_exit_code = ret; | |
b30ab791 | 395 | drbd_bcast_event(device, &sib); |
a2972846 | 396 | notify_helper(NOTIFY_RESPONSE, device, connection, cmd, ret); |
b411b363 | 397 | |
bde89a9e AG |
398 | if (current == connection->worker.task) |
399 | clear_bit(CALLBACK_PENDING, &connection->flags); | |
b411b363 PR |
400 | |
401 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
402 | ret = 0; | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
7e5fec31 | 407 | enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd) |
6b75dced PR |
408 | { |
409 | char *envp[] = { "HOME=/", | |
410 | "TERM=linux", | |
411 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
412 | (char[20]) { }, /* address family */ | |
413 | (char[60]) { }, /* address */ | |
414 | NULL }; | |
77c556f6 | 415 | char *resource_name = connection->resource->name; |
8ab761e1 | 416 | char *argv[] = {drbd_usermode_helper, cmd, resource_name, NULL }; |
6b75dced PR |
417 | int ret; |
418 | ||
bde89a9e AG |
419 | setup_khelper_env(connection, envp); |
420 | conn_md_sync(connection); | |
6b75dced | 421 | |
8ab761e1 | 422 | drbd_info(connection, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, resource_name); |
6b75dced | 423 | /* TODO: conn_bcast_event() ?? */ |
a2972846 | 424 | notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0); |
6b75dced | 425 | |
8ab761e1 | 426 | ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC); |
6b75dced | 427 | if (ret) |
1ec861eb | 428 | drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 429 | drbd_usermode_helper, cmd, resource_name, |
6b75dced PR |
430 | (ret >> 8) & 0xff, ret); |
431 | else | |
1ec861eb | 432 | drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 433 | drbd_usermode_helper, cmd, resource_name, |
6b75dced PR |
434 | (ret >> 8) & 0xff, ret); |
435 | /* TODO: conn_bcast_event() ?? */ | |
a2972846 | 436 | notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret); |
c2ba686f | 437 | |
b411b363 PR |
438 | if (ret < 0) /* Ignore any ERRNOs we got. */ |
439 | ret = 0; | |
440 | ||
441 | return ret; | |
442 | } | |
443 | ||
bde89a9e | 444 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection) |
b411b363 | 445 | { |
cb703454 | 446 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
c06ece6b | 447 | struct drbd_peer_device *peer_device; |
cb703454 PR |
448 | int vnr; |
449 | ||
695d08fa | 450 | rcu_read_lock(); |
c06ece6b AG |
451 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
452 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 453 | if (get_ldev_if_state(device, D_CONSISTENT)) { |
c06ece6b AG |
454 | struct disk_conf *disk_conf = |
455 | rcu_dereference(peer_device->device->ldev->disk_conf); | |
456 | fp = max_t(enum drbd_fencing_p, fp, disk_conf->fencing); | |
b30ab791 | 457 | put_ldev(device); |
cb703454 PR |
458 | } |
459 | } | |
695d08fa | 460 | rcu_read_unlock(); |
cb703454 PR |
461 | |
462 | return fp; | |
463 | } | |
464 | ||
7bd000cb LE |
465 | static bool resource_is_supended(struct drbd_resource *resource) |
466 | { | |
467 | return resource->susp || resource->susp_fen || resource->susp_nod; | |
468 | } | |
469 | ||
bde89a9e | 470 | bool conn_try_outdate_peer(struct drbd_connection *connection) |
b411b363 | 471 | { |
7bd000cb | 472 | struct drbd_resource * const resource = connection->resource; |
28e448bb | 473 | unsigned int connect_cnt; |
cb703454 PR |
474 | union drbd_state mask = { }; |
475 | union drbd_state val = { }; | |
476 | enum drbd_fencing_p fp; | |
b411b363 PR |
477 | char *ex_to_string; |
478 | int r; | |
b411b363 | 479 | |
7bd000cb | 480 | spin_lock_irq(&resource->req_lock); |
bde89a9e | 481 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
1ec861eb | 482 | drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n"); |
7bd000cb | 483 | spin_unlock_irq(&resource->req_lock); |
cb703454 PR |
484 | return false; |
485 | } | |
b411b363 | 486 | |
bde89a9e | 487 | connect_cnt = connection->connect_cnt; |
7bd000cb | 488 | spin_unlock_irq(&resource->req_lock); |
28e448bb | 489 | |
bde89a9e | 490 | fp = highest_fencing_policy(connection); |
cb703454 PR |
491 | switch (fp) { |
492 | case FP_NOT_AVAIL: | |
1ec861eb | 493 | drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n"); |
7bd000cb LE |
494 | spin_lock_irq(&resource->req_lock); |
495 | if (connection->cstate < C_WF_REPORT_PARAMS) { | |
496 | _conn_request_state(connection, | |
497 | (union drbd_state) { { .susp_fen = 1 } }, | |
498 | (union drbd_state) { { .susp_fen = 0 } }, | |
499 | CS_VERBOSE | CS_HARD | CS_DC_SUSP); | |
500 | /* We are no longer suspended due to the fencing policy. | |
501 | * We may still be suspended due to the on-no-data-accessible policy. | |
502 | * If that was OND_IO_ERROR, fail pending requests. */ | |
503 | if (!resource_is_supended(resource)) | |
504 | _tl_restart(connection, CONNECTION_LOST_WHILE_PENDING); | |
505 | } | |
506 | /* Else: in case we raced with a connection handshake, | |
507 | * let the handshake figure out if we maybe can RESEND, | |
508 | * and do not resume/fail pending requests here. | |
509 | * Worst case is we stay suspended for now, which may be | |
510 | * resolved by either re-establishing the replication link, or | |
511 | * the next link failure, or eventually the administrator. */ | |
512 | spin_unlock_irq(&resource->req_lock); | |
513 | return false; | |
514 | ||
cb703454 PR |
515 | case FP_DONT_CARE: |
516 | return true; | |
517 | default: ; | |
b411b363 PR |
518 | } |
519 | ||
bde89a9e | 520 | r = conn_khelper(connection, "fence-peer"); |
b411b363 PR |
521 | |
522 | switch ((r>>8) & 0xff) { | |
7e5fec31 | 523 | case P_INCONSISTENT: /* peer is inconsistent */ |
b411b363 | 524 | ex_to_string = "peer is inconsistent or worse"; |
cb703454 PR |
525 | mask.pdsk = D_MASK; |
526 | val.pdsk = D_INCONSISTENT; | |
b411b363 | 527 | break; |
7e5fec31 | 528 | case P_OUTDATED: /* peer got outdated, or was already outdated */ |
b411b363 | 529 | ex_to_string = "peer was fenced"; |
cb703454 PR |
530 | mask.pdsk = D_MASK; |
531 | val.pdsk = D_OUTDATED; | |
b411b363 | 532 | break; |
7e5fec31 | 533 | case P_DOWN: /* peer was down */ |
bde89a9e | 534 | if (conn_highest_disk(connection) == D_UP_TO_DATE) { |
b411b363 PR |
535 | /* we will(have) create(d) a new UUID anyways... */ |
536 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
537 | mask.pdsk = D_MASK; |
538 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
539 | } else { |
540 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
541 | } |
542 | break; | |
7e5fec31 | 543 | case P_PRIMARY: /* Peer is primary, voluntarily outdate myself. |
b411b363 PR |
544 | * This is useful when an unconnected R_SECONDARY is asked to |
545 | * become R_PRIMARY, but finds the other peer being active. */ | |
546 | ex_to_string = "peer is active"; | |
1ec861eb | 547 | drbd_warn(connection, "Peer is primary, outdating myself.\n"); |
cb703454 PR |
548 | mask.disk = D_MASK; |
549 | val.disk = D_OUTDATED; | |
b411b363 | 550 | break; |
7e5fec31 FF |
551 | case P_FENCING: |
552 | /* THINK: do we need to handle this | |
553 | * like case 4, or more like case 5? */ | |
b411b363 | 554 | if (fp != FP_STONITH) |
1ec861eb | 555 | drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 556 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
557 | mask.pdsk = D_MASK; |
558 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
559 | break; |
560 | default: | |
561 | /* The script is broken ... */ | |
1ec861eb | 562 | drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
cb703454 | 563 | return false; /* Eventually leave IO frozen */ |
b411b363 PR |
564 | } |
565 | ||
1ec861eb | 566 | drbd_info(connection, "fence-peer helper returned %d (%s)\n", |
cb703454 | 567 | (r>>8) & 0xff, ex_to_string); |
fb22c402 | 568 | |
cb703454 | 569 | /* Not using |
bde89a9e | 570 | conn_request_state(connection, mask, val, CS_VERBOSE); |
cb703454 PR |
571 | here, because we might were able to re-establish the connection in the |
572 | meantime. */ | |
7bd000cb | 573 | spin_lock_irq(&resource->req_lock); |
bde89a9e AG |
574 | if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) { |
575 | if (connection->connect_cnt != connect_cnt) | |
28e448bb PR |
576 | /* In case the connection was established and droped |
577 | while the fence-peer handler was running, ignore it */ | |
1ec861eb | 578 | drbd_info(connection, "Ignoring fence-peer exit code\n"); |
28e448bb | 579 | else |
bde89a9e | 580 | _conn_request_state(connection, mask, val, CS_VERBOSE); |
28e448bb | 581 | } |
7bd000cb | 582 | spin_unlock_irq(&resource->req_lock); |
cb703454 | 583 | |
bde89a9e | 584 | return conn_highest_pdsk(connection) <= D_OUTDATED; |
b411b363 PR |
585 | } |
586 | ||
87f7be4c PR |
587 | static int _try_outdate_peer_async(void *data) |
588 | { | |
bde89a9e | 589 | struct drbd_connection *connection = (struct drbd_connection *)data; |
87f7be4c | 590 | |
bde89a9e | 591 | conn_try_outdate_peer(connection); |
87f7be4c | 592 | |
05a10ec7 | 593 | kref_put(&connection->kref, drbd_destroy_connection); |
87f7be4c PR |
594 | return 0; |
595 | } | |
596 | ||
bde89a9e | 597 | void conn_try_outdate_peer_async(struct drbd_connection *connection) |
87f7be4c PR |
598 | { |
599 | struct task_struct *opa; | |
600 | ||
bde89a9e | 601 | kref_get(&connection->kref); |
bbc1c5e8 LE |
602 | /* We may just have force_sig()'ed this thread |
603 | * to get it out of some blocking network function. | |
604 | * Clear signals; otherwise kthread_run(), which internally uses | |
605 | * wait_on_completion_killable(), will mistake our pending signal | |
606 | * for a new fatal signal and fail. */ | |
607 | flush_signals(current); | |
bde89a9e | 608 | opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h"); |
9dc9fbb3 | 609 | if (IS_ERR(opa)) { |
1ec861eb | 610 | drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n"); |
05a10ec7 | 611 | kref_put(&connection->kref, drbd_destroy_connection); |
9dc9fbb3 | 612 | } |
87f7be4c | 613 | } |
b411b363 | 614 | |
bf885f8a | 615 | enum drbd_state_rv |
44a4d551 | 616 | drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int force) |
b411b363 | 617 | { |
44a4d551 LE |
618 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
619 | struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL; | |
b411b363 | 620 | const int max_tries = 4; |
bf885f8a | 621 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 622 | struct net_conf *nc; |
b411b363 PR |
623 | int try = 0; |
624 | int forced = 0; | |
625 | union drbd_state mask, val; | |
b411b363 | 626 | |
b6f85ef9 AG |
627 | if (new_role == R_PRIMARY) { |
628 | struct drbd_connection *connection; | |
629 | ||
630 | /* Detect dead peers as soon as possible. */ | |
631 | ||
632 | rcu_read_lock(); | |
633 | for_each_connection(connection, device->resource) | |
634 | request_ping(connection); | |
635 | rcu_read_unlock(); | |
636 | } | |
b411b363 | 637 | |
b30ab791 | 638 | mutex_lock(device->state_mutex); |
b411b363 PR |
639 | |
640 | mask.i = 0; mask.role = R_MASK; | |
641 | val.i = 0; val.role = new_role; | |
642 | ||
643 | while (try++ < max_tries) { | |
a8821531 | 644 | rv = _drbd_request_state_holding_state_mutex(device, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
645 | |
646 | /* in case we first succeeded to outdate, | |
647 | * but now suddenly could establish a connection */ | |
bf885f8a | 648 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
649 | val.pdsk = 0; |
650 | mask.pdsk = 0; | |
651 | continue; | |
652 | } | |
653 | ||
bf885f8a | 654 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
b30ab791 AG |
655 | (device->state.disk < D_UP_TO_DATE && |
656 | device->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
657 | mask.disk = D_MASK; |
658 | val.disk = D_UP_TO_DATE; | |
659 | forced = 1; | |
660 | continue; | |
661 | } | |
662 | ||
bf885f8a | 663 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b30ab791 | 664 | device->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
0b0ba1ef | 665 | D_ASSERT(device, device->state.pdsk == D_UNKNOWN); |
b411b363 | 666 | |
44a4d551 | 667 | if (conn_try_outdate_peer(connection)) { |
b411b363 PR |
668 | val.disk = D_UP_TO_DATE; |
669 | mask.disk = D_MASK; | |
670 | } | |
b411b363 PR |
671 | continue; |
672 | } | |
673 | ||
bf885f8a | 674 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 675 | goto out; |
bf885f8a | 676 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
44a4d551 | 677 | if (!conn_try_outdate_peer(connection) && force) { |
d0180171 | 678 | drbd_warn(device, "Forced into split brain situation!\n"); |
cb703454 PR |
679 | mask.pdsk = D_MASK; |
680 | val.pdsk = D_OUTDATED; | |
b411b363 | 681 | |
cb703454 | 682 | } |
b411b363 PR |
683 | continue; |
684 | } | |
bf885f8a | 685 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
686 | /* Maybe the peer is detected as dead very soon... |
687 | retry at most once more in this case. */ | |
9848b6dd LE |
688 | if (try < max_tries) { |
689 | int timeo; | |
b411b363 | 690 | try = max_tries - 1; |
9848b6dd LE |
691 | rcu_read_lock(); |
692 | nc = rcu_dereference(connection->net_conf); | |
693 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
694 | rcu_read_unlock(); | |
695 | schedule_timeout_interruptible(timeo); | |
696 | } | |
b411b363 PR |
697 | continue; |
698 | } | |
bf885f8a | 699 | if (rv < SS_SUCCESS) { |
b30ab791 | 700 | rv = _drbd_request_state(device, mask, val, |
b411b363 | 701 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 702 | if (rv < SS_SUCCESS) |
3b98c0c2 | 703 | goto out; |
b411b363 PR |
704 | } |
705 | break; | |
706 | } | |
707 | ||
bf885f8a | 708 | if (rv < SS_SUCCESS) |
3b98c0c2 | 709 | goto out; |
b411b363 PR |
710 | |
711 | if (forced) | |
d0180171 | 712 | drbd_warn(device, "Forced to consider local data as UpToDate!\n"); |
b411b363 PR |
713 | |
714 | /* Wait until nothing is on the fly :) */ | |
b30ab791 | 715 | wait_event(device->misc_wait, atomic_read(&device->ap_pending_cnt) == 0); |
b411b363 | 716 | |
b6dd1a89 LE |
717 | /* FIXME also wait for all pending P_BARRIER_ACK? */ |
718 | ||
b411b363 | 719 | if (new_role == R_SECONDARY) { |
b30ab791 AG |
720 | if (get_ldev(device)) { |
721 | device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
722 | put_ldev(device); | |
b411b363 PR |
723 | } |
724 | } else { | |
66ce6dbc | 725 | mutex_lock(&device->resource->conf_update); |
44a4d551 | 726 | nc = connection->net_conf; |
44ed167d | 727 | if (nc) |
6139f60d | 728 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
66ce6dbc | 729 | mutex_unlock(&device->resource->conf_update); |
91fd4dad | 730 | |
b30ab791 AG |
731 | if (get_ldev(device)) { |
732 | if (((device->state.conn < C_CONNECTED || | |
733 | device->state.pdsk <= D_FAILED) | |
734 | && device->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
735 | drbd_uuid_new_current(device); | |
b411b363 | 736 | |
b30ab791 AG |
737 | device->ldev->md.uuid[UI_CURRENT] |= (u64)1; |
738 | put_ldev(device); | |
b411b363 PR |
739 | } |
740 | } | |
741 | ||
19f843aa LE |
742 | /* writeout of activity log covered areas of the bitmap |
743 | * to stable storage done in after state change already */ | |
b411b363 | 744 | |
b30ab791 | 745 | if (device->state.conn >= C_WF_REPORT_PARAMS) { |
b411b363 PR |
746 | /* if this was forced, we should consider sync */ |
747 | if (forced) | |
44a4d551 LE |
748 | drbd_send_uuids(peer_device); |
749 | drbd_send_current_state(peer_device); | |
b411b363 PR |
750 | } |
751 | ||
b30ab791 | 752 | drbd_md_sync(device); |
720979fb | 753 | set_disk_ro(device->vdisk, new_role == R_SECONDARY); |
b30ab791 | 754 | kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE); |
3b98c0c2 | 755 | out: |
b30ab791 | 756 | mutex_unlock(device->state_mutex); |
bf885f8a | 757 | return rv; |
b411b363 PR |
758 | } |
759 | ||
3b98c0c2 | 760 | static const char *from_attrs_err_to_txt(int err) |
ef50a3e3 | 761 | { |
3b98c0c2 LE |
762 | return err == -ENOMSG ? "required attribute missing" : |
763 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 764 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 765 | "invalid attribute value"; |
ef50a3e3 | 766 | } |
b411b363 | 767 | |
3b98c0c2 | 768 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 769 | { |
a910b123 | 770 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
771 | struct set_role_parms parms; |
772 | int err; | |
773 | enum drbd_ret_code retcode; | |
b411b363 | 774 | |
a910b123 | 775 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
776 | if (!adm_ctx.reply_skb) |
777 | return retcode; | |
778 | if (retcode != NO_ERROR) | |
779 | goto out; | |
b411b363 | 780 | |
3b98c0c2 LE |
781 | memset(&parms, 0, sizeof(parms)); |
782 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 783 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
784 | if (err) { |
785 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 786 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
787 | goto out; |
788 | } | |
789 | } | |
9e276872 LE |
790 | genl_unlock(); |
791 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 792 | |
3b98c0c2 | 793 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) |
b30ab791 | 794 | retcode = drbd_set_role(adm_ctx.device, R_PRIMARY, parms.assume_uptodate); |
3b98c0c2 | 795 | else |
b30ab791 | 796 | retcode = drbd_set_role(adm_ctx.device, R_SECONDARY, 0); |
9e276872 LE |
797 | |
798 | mutex_unlock(&adm_ctx.resource->adm_mutex); | |
799 | genl_lock(); | |
3b98c0c2 | 800 | out: |
a910b123 | 801 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
802 | return 0; |
803 | } | |
804 | ||
ae8bf312 LE |
805 | /* Initializes the md.*_offset members, so we are able to find |
806 | * the on disk meta data. | |
807 | * | |
808 | * We currently have two possible layouts: | |
809 | * external: | |
810 | * |----------- md_size_sect ------------------| | |
811 | * [ 4k superblock ][ activity log ][ Bitmap ] | |
812 | * | al_offset == 8 | | |
813 | * | bm_offset = al_offset + X | | |
814 | * ==> bitmap sectors = md_size_sect - bm_offset | |
815 | * | |
816 | * internal: | |
817 | * |----------- md_size_sect ------------------| | |
818 | * [data.....][ Bitmap ][ activity log ][ 4k superblock ] | |
819 | * | al_offset < 0 | | |
820 | * | bm_offset = al_offset - Y | | |
821 | * ==> bitmap sectors = Y = al_offset - bm_offset | |
822 | * | |
823 | * Activity log size used to be fixed 32kB, | |
824 | * but is about to become configurable. | |
825 | */ | |
b30ab791 | 826 | static void drbd_md_set_sector_offsets(struct drbd_device *device, |
b411b363 PR |
827 | struct drbd_backing_dev *bdev) |
828 | { | |
829 | sector_t md_size_sect = 0; | |
c04ccaa6 | 830 | unsigned int al_size_sect = bdev->md.al_size_4k * 8; |
daeda1cc | 831 | |
3a4d4eb3 LE |
832 | bdev->md.md_offset = drbd_md_ss(bdev); |
833 | ||
68e41a43 | 834 | switch (bdev->md.meta_dev_idx) { |
b411b363 PR |
835 | default: |
836 | /* v07 style fixed size indexed meta data */ | |
ae8bf312 | 837 | bdev->md.md_size_sect = MD_128MB_SECT; |
ae8bf312 LE |
838 | bdev->md.al_offset = MD_4kB_SECT; |
839 | bdev->md.bm_offset = MD_4kB_SECT + al_size_sect; | |
b411b363 PR |
840 | break; |
841 | case DRBD_MD_INDEX_FLEX_EXT: | |
842 | /* just occupy the full device; unit: sectors */ | |
843 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
ae8bf312 LE |
844 | bdev->md.al_offset = MD_4kB_SECT; |
845 | bdev->md.bm_offset = MD_4kB_SECT + al_size_sect; | |
b411b363 PR |
846 | break; |
847 | case DRBD_MD_INDEX_INTERNAL: | |
848 | case DRBD_MD_INDEX_FLEX_INT: | |
b411b363 | 849 | /* al size is still fixed */ |
ae8bf312 | 850 | bdev->md.al_offset = -al_size_sect; |
b411b363 PR |
851 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
852 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
853 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
854 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
855 | md_size_sect = ALIGN(md_size_sect, 8); | |
856 | ||
857 | /* plus the "drbd meta data super block", | |
858 | * and the activity log; */ | |
ae8bf312 | 859 | md_size_sect += MD_4kB_SECT + al_size_sect; |
b411b363 PR |
860 | |
861 | bdev->md.md_size_sect = md_size_sect; | |
862 | /* bitmap offset is adjusted by 'super' block size */ | |
ae8bf312 | 863 | bdev->md.bm_offset = -md_size_sect + MD_4kB_SECT; |
b411b363 PR |
864 | break; |
865 | } | |
866 | } | |
867 | ||
4b0715f0 | 868 | /* input size is expected to be in KB */ |
b411b363 PR |
869 | char *ppsize(char *buf, unsigned long long size) |
870 | { | |
4b0715f0 LE |
871 | /* Needs 9 bytes at max including trailing NUL: |
872 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
873 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
874 | int base = 0; | |
4b0715f0 | 875 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
876 | /* shift + round */ |
877 | size = (size >> 10) + !!(size & (1<<9)); | |
878 | base++; | |
879 | } | |
4b0715f0 | 880 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
881 | |
882 | return buf; | |
883 | } | |
884 | ||
885 | /* there is still a theoretical deadlock when called from receiver | |
886 | * on an D_INCONSISTENT R_PRIMARY: | |
887 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
888 | * packet from remote to dec_ap_bio again. | |
889 | * receiver receive_sizes(), comes here, | |
890 | * waits for ap_bio_cnt == 0. -> deadlock. | |
891 | * but this cannot happen, actually, because: | |
892 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
893 | * (not connected, or bad/no disk on peer): | |
894 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
895 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
896 | * peer may not initiate a resize. | |
897 | */ | |
3b98c0c2 LE |
898 | /* Note these are not to be confused with |
899 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
900 | * which are (sub) state changes triggered by admin (drbdsetup), | |
901 | * and can be long lived. | |
b30ab791 | 902 | * This changes an device->flag, is triggered by drbd internals, |
3b98c0c2 | 903 | * and should be short-lived. */ |
7dbb4386 PR |
904 | /* It needs to be a counter, since multiple threads might |
905 | independently suspend and resume IO. */ | |
b30ab791 | 906 | void drbd_suspend_io(struct drbd_device *device) |
b411b363 | 907 | { |
7dbb4386 | 908 | atomic_inc(&device->suspend_cnt); |
b30ab791 | 909 | if (drbd_suspended(device)) |
265be2d0 | 910 | return; |
b30ab791 | 911 | wait_event(device->misc_wait, !atomic_read(&device->ap_bio_cnt)); |
b411b363 PR |
912 | } |
913 | ||
b30ab791 | 914 | void drbd_resume_io(struct drbd_device *device) |
b411b363 | 915 | { |
7dbb4386 PR |
916 | if (atomic_dec_and_test(&device->suspend_cnt)) |
917 | wake_up(&device->misc_wait); | |
b411b363 PR |
918 | } |
919 | ||
920 | /** | |
921 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
b30ab791 | 922 | * @device: DRBD device. |
b411b363 PR |
923 | * |
924 | * Returns 0 on success, negative return values indicate errors. | |
925 | * You should call drbd_md_sync() after calling this function. | |
926 | */ | |
d752b269 | 927 | enum determine_dev_size |
b30ab791 | 928 | drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct resize_parms *rs) __must_hold(local) |
b411b363 | 929 | { |
8011e249 LE |
930 | struct md_offsets_and_sizes { |
931 | u64 last_agreed_sect; | |
932 | u64 md_offset; | |
933 | s32 al_offset; | |
934 | s32 bm_offset; | |
935 | u32 md_size_sect; | |
936 | ||
937 | u32 al_stripes; | |
938 | u32 al_stripe_size_4k; | |
939 | } prev; | |
940 | sector_t u_size, size; | |
b30ab791 | 941 | struct drbd_md *md = &device->ldev->md; |
d752b269 | 942 | void *buffer; |
b411b363 PR |
943 | |
944 | int md_moved, la_size_changed; | |
e96c9633 | 945 | enum determine_dev_size rv = DS_UNCHANGED; |
b411b363 | 946 | |
5f7c0124 LE |
947 | /* We may change the on-disk offsets of our meta data below. Lock out |
948 | * anything that may cause meta data IO, to avoid acting on incomplete | |
949 | * layout changes or scribbling over meta data that is in the process | |
950 | * of being moved. | |
b411b363 | 951 | * |
5f7c0124 LE |
952 | * Move is not exactly correct, btw, currently we have all our meta |
953 | * data in core memory, to "move" it we just write it all out, there | |
954 | * are no reads. */ | |
b30ab791 | 955 | drbd_suspend_io(device); |
e37d2438 | 956 | buffer = drbd_md_get_buffer(device, __func__); /* Lock meta-data IO */ |
d752b269 | 957 | if (!buffer) { |
b30ab791 | 958 | drbd_resume_io(device); |
d752b269 PR |
959 | return DS_ERROR; |
960 | } | |
b411b363 | 961 | |
8011e249 LE |
962 | /* remember current offset and sizes */ |
963 | prev.last_agreed_sect = md->la_size_sect; | |
964 | prev.md_offset = md->md_offset; | |
965 | prev.al_offset = md->al_offset; | |
966 | prev.bm_offset = md->bm_offset; | |
967 | prev.md_size_sect = md->md_size_sect; | |
968 | prev.al_stripes = md->al_stripes; | |
969 | prev.al_stripe_size_4k = md->al_stripe_size_4k; | |
b411b363 | 970 | |
d752b269 PR |
971 | if (rs) { |
972 | /* rs is non NULL if we should change the AL layout only */ | |
d752b269 PR |
973 | md->al_stripes = rs->al_stripes; |
974 | md->al_stripe_size_4k = rs->al_stripe_size / 4; | |
975 | md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4; | |
976 | } | |
977 | ||
b30ab791 | 978 | drbd_md_set_sector_offsets(device, device->ldev); |
b411b363 | 979 | |
daeda1cc | 980 | rcu_read_lock(); |
b30ab791 | 981 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
daeda1cc | 982 | rcu_read_unlock(); |
b30ab791 | 983 | size = drbd_new_dev_size(device, device->ldev, u_size, flags & DDSF_FORCED); |
b411b363 | 984 | |
8011e249 | 985 | if (size < prev.last_agreed_sect) { |
d752b269 PR |
986 | if (rs && u_size == 0) { |
987 | /* Remove "rs &&" later. This check should always be active, but | |
988 | right now the receiver expects the permissive behavior */ | |
d0180171 | 989 | drbd_warn(device, "Implicit shrink not allowed. " |
d752b269 PR |
990 | "Use --size=%llus for explicit shrink.\n", |
991 | (unsigned long long)size); | |
992 | rv = DS_ERROR_SHRINK; | |
993 | } | |
994 | if (u_size > size) | |
995 | rv = DS_ERROR_SPACE_MD; | |
996 | if (rv != DS_UNCHANGED) | |
997 | goto err_out; | |
998 | } | |
999 | ||
b30ab791 AG |
1000 | if (drbd_get_capacity(device->this_bdev) != size || |
1001 | drbd_bm_capacity(device) != size) { | |
b411b363 | 1002 | int err; |
b30ab791 | 1003 | err = drbd_bm_resize(device, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
1004 | if (unlikely(err)) { |
1005 | /* currently there is only one error: ENOMEM! */ | |
8011e249 | 1006 | size = drbd_bm_capacity(device); |
b411b363 | 1007 | if (size == 0) { |
d0180171 | 1008 | drbd_err(device, "OUT OF MEMORY! " |
b411b363 PR |
1009 | "Could not allocate bitmap!\n"); |
1010 | } else { | |
d0180171 | 1011 | drbd_err(device, "BM resizing failed. " |
8011e249 | 1012 | "Leaving size unchanged\n"); |
b411b363 | 1013 | } |
e96c9633 | 1014 | rv = DS_ERROR; |
b411b363 PR |
1015 | } |
1016 | /* racy, see comments above. */ | |
b30ab791 | 1017 | drbd_set_my_capacity(device, size); |
8011e249 | 1018 | md->la_size_sect = size; |
b411b363 | 1019 | } |
d752b269 PR |
1020 | if (rv <= DS_ERROR) |
1021 | goto err_out; | |
b411b363 | 1022 | |
8011e249 | 1023 | la_size_changed = (prev.last_agreed_sect != md->la_size_sect); |
b411b363 | 1024 | |
8011e249 LE |
1025 | md_moved = prev.md_offset != md->md_offset |
1026 | || prev.md_size_sect != md->md_size_sect; | |
b411b363 | 1027 | |
d752b269 PR |
1028 | if (la_size_changed || md_moved || rs) { |
1029 | u32 prev_flags; | |
24dccabb | 1030 | |
fcb09674 LE |
1031 | /* We do some synchronous IO below, which may take some time. |
1032 | * Clear the timer, to avoid scary "timer expired!" messages, | |
1033 | * "Superblock" is written out at least twice below, anyways. */ | |
1034 | del_timer(&device->md_sync_timer); | |
d752b269 | 1035 | |
5f7c0124 LE |
1036 | /* We won't change the "al-extents" setting, we just may need |
1037 | * to move the on-disk location of the activity log ringbuffer. | |
1038 | * Lock for transaction is good enough, it may well be "dirty" | |
1039 | * or even "starving". */ | |
1040 | wait_event(device->al_wait, lc_try_lock_for_transaction(device->act_log)); | |
1041 | ||
1042 | /* mark current on-disk bitmap and activity log as unreliable */ | |
d752b269 | 1043 | prev_flags = md->flags; |
5f7c0124 | 1044 | md->flags |= MDF_FULL_SYNC | MDF_AL_DISABLED; |
b30ab791 | 1045 | drbd_md_write(device, buffer); |
d752b269 | 1046 | |
5f7c0124 LE |
1047 | drbd_al_initialize(device, buffer); |
1048 | ||
d0180171 | 1049 | drbd_info(device, "Writing the whole bitmap, %s\n", |
b411b363 PR |
1050 | la_size_changed && md_moved ? "size changed and md moved" : |
1051 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 | 1052 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
b30ab791 | 1053 | drbd_bitmap_io(device, md_moved ? &drbd_bm_write_all : &drbd_bm_write, |
d752b269 | 1054 | "size changed", BM_LOCKED_MASK); |
d752b269 | 1055 | |
5f7c0124 LE |
1056 | /* on-disk bitmap and activity log is authoritative again |
1057 | * (unless there was an IO error meanwhile...) */ | |
d752b269 | 1058 | md->flags = prev_flags; |
b30ab791 | 1059 | drbd_md_write(device, buffer); |
d752b269 PR |
1060 | |
1061 | if (rs) | |
d0180171 AG |
1062 | drbd_info(device, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n", |
1063 | md->al_stripes, md->al_stripe_size_4k * 4); | |
b411b363 PR |
1064 | } |
1065 | ||
8011e249 LE |
1066 | if (size > prev.last_agreed_sect) |
1067 | rv = prev.last_agreed_sect ? DS_GREW : DS_GREW_FROM_ZERO; | |
1068 | if (size < prev.last_agreed_sect) | |
e96c9633 | 1069 | rv = DS_SHRUNK; |
d752b269 PR |
1070 | |
1071 | if (0) { | |
1072 | err_out: | |
8011e249 LE |
1073 | /* restore previous offset and sizes */ |
1074 | md->la_size_sect = prev.last_agreed_sect; | |
1075 | md->md_offset = prev.md_offset; | |
1076 | md->al_offset = prev.al_offset; | |
1077 | md->bm_offset = prev.bm_offset; | |
1078 | md->md_size_sect = prev.md_size_sect; | |
1079 | md->al_stripes = prev.al_stripes; | |
1080 | md->al_stripe_size_4k = prev.al_stripe_size_4k; | |
1081 | md->al_size_4k = (u64)prev.al_stripes * prev.al_stripe_size_4k; | |
d752b269 | 1082 | } |
b30ab791 AG |
1083 | lc_unlock(device->act_log); |
1084 | wake_up(&device->al_wait); | |
1085 | drbd_md_put_buffer(device); | |
1086 | drbd_resume_io(device); | |
b411b363 PR |
1087 | |
1088 | return rv; | |
1089 | } | |
1090 | ||
1091 | sector_t | |
b30ab791 | 1092 | drbd_new_dev_size(struct drbd_device *device, struct drbd_backing_dev *bdev, |
ef5e44a6 | 1093 | sector_t u_size, int assume_peer_has_space) |
b411b363 | 1094 | { |
b30ab791 | 1095 | sector_t p_size = device->p_size; /* partner's disk size. */ |
cccac985 | 1096 | sector_t la_size_sect = bdev->md.la_size_sect; /* last agreed size. */ |
b411b363 | 1097 | sector_t m_size; /* my size */ |
b411b363 PR |
1098 | sector_t size = 0; |
1099 | ||
1100 | m_size = drbd_get_max_capacity(bdev); | |
1101 | ||
b30ab791 | 1102 | if (device->state.conn < C_CONNECTED && assume_peer_has_space) { |
d0180171 | 1103 | drbd_warn(device, "Resize while not connected was forced by the user!\n"); |
a393db6f PR |
1104 | p_size = m_size; |
1105 | } | |
1106 | ||
b411b363 PR |
1107 | if (p_size && m_size) { |
1108 | size = min_t(sector_t, p_size, m_size); | |
1109 | } else { | |
cccac985 LE |
1110 | if (la_size_sect) { |
1111 | size = la_size_sect; | |
b411b363 PR |
1112 | if (m_size && m_size < size) |
1113 | size = m_size; | |
1114 | if (p_size && p_size < size) | |
1115 | size = p_size; | |
1116 | } else { | |
1117 | if (m_size) | |
1118 | size = m_size; | |
1119 | if (p_size) | |
1120 | size = p_size; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | if (size == 0) | |
d0180171 | 1125 | drbd_err(device, "Both nodes diskless!\n"); |
b411b363 PR |
1126 | |
1127 | if (u_size) { | |
1128 | if (u_size > size) | |
d0180171 | 1129 | drbd_err(device, "Requested disk size is too big (%lu > %lu)\n", |
b411b363 PR |
1130 | (unsigned long)u_size>>1, (unsigned long)size>>1); |
1131 | else | |
1132 | size = u_size; | |
1133 | } | |
1134 | ||
1135 | return size; | |
1136 | } | |
1137 | ||
1138 | /** | |
1139 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
b30ab791 | 1140 | * @device: DRBD device. |
b411b363 PR |
1141 | * |
1142 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
1143 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
1144 | * this function. | |
1145 | */ | |
b30ab791 | 1146 | static int drbd_check_al_size(struct drbd_device *device, struct disk_conf *dc) |
b411b363 PR |
1147 | { |
1148 | struct lru_cache *n, *t; | |
1149 | struct lc_element *e; | |
1150 | unsigned int in_use; | |
1151 | int i; | |
1152 | ||
b30ab791 AG |
1153 | if (device->act_log && |
1154 | device->act_log->nr_elements == dc->al_extents) | |
b411b363 PR |
1155 | return 0; |
1156 | ||
1157 | in_use = 0; | |
b30ab791 | 1158 | t = device->act_log; |
7ad651b5 | 1159 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 1160 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
1161 | |
1162 | if (n == NULL) { | |
d0180171 | 1163 | drbd_err(device, "Cannot allocate act_log lru!\n"); |
b411b363 PR |
1164 | return -ENOMEM; |
1165 | } | |
b30ab791 | 1166 | spin_lock_irq(&device->al_lock); |
b411b363 PR |
1167 | if (t) { |
1168 | for (i = 0; i < t->nr_elements; i++) { | |
1169 | e = lc_element_by_index(t, i); | |
1170 | if (e->refcnt) | |
d0180171 | 1171 | drbd_err(device, "refcnt(%d)==%d\n", |
b411b363 PR |
1172 | e->lc_number, e->refcnt); |
1173 | in_use += e->refcnt; | |
1174 | } | |
1175 | } | |
1176 | if (!in_use) | |
b30ab791 AG |
1177 | device->act_log = n; |
1178 | spin_unlock_irq(&device->al_lock); | |
b411b363 | 1179 | if (in_use) { |
d0180171 | 1180 | drbd_err(device, "Activity log still in use!\n"); |
b411b363 PR |
1181 | lc_destroy(n); |
1182 | return -EBUSY; | |
1183 | } else { | |
d01efcee | 1184 | lc_destroy(t); |
b411b363 | 1185 | } |
b30ab791 | 1186 | drbd_md_mark_dirty(device); /* we changed device->act_log->nr_elemens */ |
b411b363 PR |
1187 | return 0; |
1188 | } | |
1189 | ||
69ba1ee9 LE |
1190 | static void blk_queue_discard_granularity(struct request_queue *q, unsigned int granularity) |
1191 | { | |
1192 | q->limits.discard_granularity = granularity; | |
1193 | } | |
9104d31a LE |
1194 | |
1195 | static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection) | |
1196 | { | |
1197 | /* when we introduced REQ_WRITE_SAME support, we also bumped | |
1198 | * our maximum supported batch bio size used for discards. */ | |
1199 | if (connection->agreed_features & DRBD_FF_WSAME) | |
1200 | return DRBD_MAX_BBIO_SECTORS; | |
1201 | /* before, with DRBD <= 8.4.6, we only allowed up to one AL_EXTENT_SIZE. */ | |
1202 | return AL_EXTENT_SIZE >> 9; | |
1203 | } | |
1204 | ||
69ba1ee9 LE |
1205 | static void decide_on_discard_support(struct drbd_device *device, |
1206 | struct request_queue *q, | |
1207 | struct request_queue *b, | |
1208 | bool discard_zeroes_if_aligned) | |
1209 | { | |
1210 | /* q = drbd device queue (device->rq_queue) | |
1211 | * b = backing device queue (device->ldev->backing_bdev->bd_disk->queue), | |
1212 | * or NULL if diskless | |
1213 | */ | |
1214 | struct drbd_connection *connection = first_peer_device(device)->connection; | |
1215 | bool can_do = b ? blk_queue_discard(b) : true; | |
1216 | ||
9104d31a | 1217 | if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_TRIM)) { |
69ba1ee9 LE |
1218 | can_do = false; |
1219 | drbd_info(connection, "peer DRBD too old, does not support TRIM: disabling discards\n"); | |
1220 | } | |
1221 | if (can_do) { | |
1222 | /* We don't care for the granularity, really. | |
1223 | * Stacking limits below should fix it for the local | |
1224 | * device. Whether or not it is a suitable granularity | |
1225 | * on the remote device is not our problem, really. If | |
1226 | * you care, you need to use devices with similar | |
1227 | * topology on all peers. */ | |
1228 | blk_queue_discard_granularity(q, 512); | |
9104d31a | 1229 | q->limits.max_discard_sectors = drbd_max_discard_sectors(connection); |
8b904b5b | 1230 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); |
45c21793 | 1231 | q->limits.max_write_zeroes_sectors = drbd_max_discard_sectors(connection); |
69ba1ee9 | 1232 | } else { |
8b904b5b | 1233 | blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q); |
69ba1ee9 LE |
1234 | blk_queue_discard_granularity(q, 0); |
1235 | q->limits.max_discard_sectors = 0; | |
45c21793 | 1236 | q->limits.max_write_zeroes_sectors = 0; |
69ba1ee9 LE |
1237 | } |
1238 | } | |
1239 | ||
1240 | static void fixup_discard_if_not_supported(struct request_queue *q) | |
1241 | { | |
1242 | /* To avoid confusion, if this queue does not support discard, clear | |
1243 | * max_discard_sectors, which is what lsblk -D reports to the user. | |
1244 | * Older kernels got this wrong in "stack limits". | |
1245 | * */ | |
1246 | if (!blk_queue_discard(q)) { | |
1247 | blk_queue_max_discard_sectors(q, 0); | |
1248 | blk_queue_discard_granularity(q, 0); | |
1249 | } | |
1250 | } | |
1251 | ||
f31e583a LE |
1252 | static void fixup_write_zeroes(struct drbd_device *device, struct request_queue *q) |
1253 | { | |
1254 | /* Fixup max_write_zeroes_sectors after blk_queue_stack_limits(): | |
1255 | * if we can handle "zeroes" efficiently on the protocol, | |
1256 | * we want to do that, even if our backend does not announce | |
1257 | * max_write_zeroes_sectors itself. */ | |
1258 | struct drbd_connection *connection = first_peer_device(device)->connection; | |
1259 | /* If the peer announces WZEROES support, use it. Otherwise, rather | |
1260 | * send explicit zeroes than rely on some discard-zeroes-data magic. */ | |
1261 | if (connection->agreed_features & DRBD_FF_WZEROES) | |
1262 | q->limits.max_write_zeroes_sectors = DRBD_MAX_BBIO_SECTORS; | |
1263 | else | |
1264 | q->limits.max_write_zeroes_sectors = 0; | |
1265 | } | |
1266 | ||
9104d31a LE |
1267 | static void decide_on_write_same_support(struct drbd_device *device, |
1268 | struct request_queue *q, | |
9de7e14a LE |
1269 | struct request_queue *b, struct o_qlim *o, |
1270 | bool disable_write_same) | |
9104d31a LE |
1271 | { |
1272 | struct drbd_peer_device *peer_device = first_peer_device(device); | |
1273 | struct drbd_connection *connection = peer_device->connection; | |
1274 | bool can_do = b ? b->limits.max_write_same_sectors : true; | |
1275 | ||
9de7e14a LE |
1276 | if (can_do && disable_write_same) { |
1277 | can_do = false; | |
1278 | drbd_info(peer_device, "WRITE_SAME disabled by config\n"); | |
1279 | } | |
1280 | ||
9104d31a LE |
1281 | if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_WSAME)) { |
1282 | can_do = false; | |
1283 | drbd_info(peer_device, "peer does not support WRITE_SAME\n"); | |
1284 | } | |
1285 | ||
1286 | if (o) { | |
1287 | /* logical block size; queue_logical_block_size(NULL) is 512 */ | |
1288 | unsigned int peer_lbs = be32_to_cpu(o->logical_block_size); | |
1289 | unsigned int me_lbs_b = queue_logical_block_size(b); | |
1290 | unsigned int me_lbs = queue_logical_block_size(q); | |
1291 | ||
1292 | if (me_lbs_b != me_lbs) { | |
1293 | drbd_warn(device, | |
1294 | "logical block size of local backend does not match (drbd:%u, backend:%u); was this a late attach?\n", | |
1295 | me_lbs, me_lbs_b); | |
1296 | /* rather disable write same than trigger some BUG_ON later in the scsi layer. */ | |
1297 | can_do = false; | |
1298 | } | |
1299 | if (me_lbs_b != peer_lbs) { | |
1300 | drbd_warn(peer_device, "logical block sizes do not match (me:%u, peer:%u); this may cause problems.\n", | |
1301 | me_lbs, peer_lbs); | |
1302 | if (can_do) { | |
1303 | drbd_dbg(peer_device, "logical block size mismatch: WRITE_SAME disabled.\n"); | |
1304 | can_do = false; | |
1305 | } | |
1306 | me_lbs = max(me_lbs, me_lbs_b); | |
1307 | /* We cannot change the logical block size of an in-use queue. | |
1308 | * We can only hope that access happens to be properly aligned. | |
1309 | * If not, the peer will likely produce an IO error, and detach. */ | |
1310 | if (peer_lbs > me_lbs) { | |
1311 | if (device->state.role != R_PRIMARY) { | |
1312 | blk_queue_logical_block_size(q, peer_lbs); | |
1313 | drbd_warn(peer_device, "logical block size set to %u\n", peer_lbs); | |
1314 | } else { | |
1315 | drbd_warn(peer_device, | |
1316 | "current Primary must NOT adjust logical block size (%u -> %u); hope for the best.\n", | |
1317 | me_lbs, peer_lbs); | |
1318 | } | |
1319 | } | |
1320 | } | |
1321 | if (can_do && !o->write_same_capable) { | |
1322 | /* If we introduce an open-coded write-same loop on the receiving side, | |
1323 | * the peer would present itself as "capable". */ | |
1324 | drbd_dbg(peer_device, "WRITE_SAME disabled (peer device not capable)\n"); | |
1325 | can_do = false; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | blk_queue_max_write_same_sectors(q, can_do ? DRBD_MAX_BBIO_SECTORS : 0); | |
1330 | } | |
1331 | ||
8fe39aac | 1332 | static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backing_dev *bdev, |
9104d31a | 1333 | unsigned int max_bio_size, struct o_qlim *o) |
b411b363 | 1334 | { |
b30ab791 | 1335 | struct request_queue * const q = device->rq_queue; |
db141b2f LE |
1336 | unsigned int max_hw_sectors = max_bio_size >> 9; |
1337 | unsigned int max_segments = 0; | |
c1b3156f | 1338 | struct request_queue *b = NULL; |
dd4f699d LE |
1339 | struct disk_conf *dc; |
1340 | bool discard_zeroes_if_aligned = true; | |
9de7e14a | 1341 | bool disable_write_same = false; |
99432fcc | 1342 | |
8fe39aac PR |
1343 | if (bdev) { |
1344 | b = bdev->backing_bdev->bd_disk->queue; | |
99432fcc PR |
1345 | |
1346 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc | 1347 | rcu_read_lock(); |
dd4f699d LE |
1348 | dc = rcu_dereference(device->ldev->disk_conf); |
1349 | max_segments = dc->max_bio_bvecs; | |
1350 | discard_zeroes_if_aligned = dc->discard_zeroes_if_aligned; | |
9de7e14a | 1351 | disable_write_same = dc->disable_write_same; |
daeda1cc | 1352 | rcu_read_unlock(); |
c1b3156f PR |
1353 | |
1354 | blk_set_stacking_limits(&q->limits); | |
99432fcc | 1355 | } |
b411b363 | 1356 | |
1816a2b4 LE |
1357 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1358 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1359 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
09cbfeaf | 1360 | blk_queue_segment_boundary(q, PAGE_SIZE-1); |
69ba1ee9 | 1361 | decide_on_discard_support(device, q, b, discard_zeroes_if_aligned); |
9de7e14a | 1362 | decide_on_write_same_support(device, q, b, o, disable_write_same); |
9104d31a | 1363 | |
c1b3156f | 1364 | if (b) { |
99432fcc PR |
1365 | blk_queue_stack_limits(q, b); |
1366 | ||
dc3b17cc JK |
1367 | if (q->backing_dev_info->ra_pages != |
1368 | b->backing_dev_info->ra_pages) { | |
d0180171 | 1369 | drbd_info(device, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", |
dc3b17cc JK |
1370 | q->backing_dev_info->ra_pages, |
1371 | b->backing_dev_info->ra_pages); | |
1372 | q->backing_dev_info->ra_pages = | |
1373 | b->backing_dev_info->ra_pages; | |
99432fcc | 1374 | } |
99432fcc | 1375 | } |
69ba1ee9 | 1376 | fixup_discard_if_not_supported(q); |
f31e583a | 1377 | fixup_write_zeroes(device, q); |
99432fcc PR |
1378 | } |
1379 | ||
9104d31a | 1380 | void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev, struct o_qlim *o) |
99432fcc | 1381 | { |
db141b2f | 1382 | unsigned int now, new, local, peer; |
99432fcc | 1383 | |
b30ab791 AG |
1384 | now = queue_max_hw_sectors(device->rq_queue) << 9; |
1385 | local = device->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1386 | peer = device->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1387 | |
8fe39aac PR |
1388 | if (bdev) { |
1389 | local = queue_max_hw_sectors(bdev->backing_bdev->bd_disk->queue) << 9; | |
b30ab791 | 1390 | device->local_max_bio_size = local; |
b411b363 | 1391 | } |
db141b2f | 1392 | local = min(local, DRBD_MAX_BIO_SIZE); |
99432fcc PR |
1393 | |
1394 | /* We may ignore peer limits if the peer is modern enough. | |
1395 | Because new from 8.3.8 onwards the peer can use multiple | |
1396 | BIOs for a single peer_request */ | |
b30ab791 | 1397 | if (device->state.conn >= C_WF_REPORT_PARAMS) { |
a6b32bc3 | 1398 | if (first_peer_device(device)->connection->agreed_pro_version < 94) |
b30ab791 | 1399 | peer = min(device->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET); |
6809384c | 1400 | /* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */ |
a6b32bc3 | 1401 | else if (first_peer_device(device)->connection->agreed_pro_version == 94) |
99432fcc | 1402 | peer = DRBD_MAX_SIZE_H80_PACKET; |
a6b32bc3 | 1403 | else if (first_peer_device(device)->connection->agreed_pro_version < 100) |
2ffca4f3 PR |
1404 | peer = DRBD_MAX_BIO_SIZE_P95; /* drbd 8.3.8 onwards, before 8.4.0 */ |
1405 | else | |
99432fcc | 1406 | peer = DRBD_MAX_BIO_SIZE; |
99432fcc | 1407 | |
fa090e70 LE |
1408 | /* We may later detach and re-attach on a disconnected Primary. |
1409 | * Avoid this setting to jump back in that case. | |
1410 | * We want to store what we know the peer DRBD can handle, | |
1411 | * not what the peer IO backend can handle. */ | |
1412 | if (peer > device->peer_max_bio_size) | |
1413 | device->peer_max_bio_size = peer; | |
1414 | } | |
db141b2f | 1415 | new = min(local, peer); |
99432fcc | 1416 | |
b30ab791 | 1417 | if (device->state.role == R_PRIMARY && new < now) |
d0180171 | 1418 | drbd_err(device, "ASSERT FAILED new < now; (%u < %u)\n", new, now); |
99432fcc PR |
1419 | |
1420 | if (new != now) | |
d0180171 | 1421 | drbd_info(device, "max BIO size = %u\n", new); |
99432fcc | 1422 | |
9104d31a | 1423 | drbd_setup_queue_param(device, bdev, new, o); |
b411b363 PR |
1424 | } |
1425 | ||
a18e9d1e | 1426 | /* Starts the worker thread */ |
bde89a9e | 1427 | static void conn_reconfig_start(struct drbd_connection *connection) |
b411b363 | 1428 | { |
bde89a9e | 1429 | drbd_thread_start(&connection->worker); |
b5043c5e | 1430 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 PR |
1431 | } |
1432 | ||
a18e9d1e | 1433 | /* if still unconfigured, stops worker again. */ |
bde89a9e | 1434 | static void conn_reconfig_done(struct drbd_connection *connection) |
b411b363 | 1435 | { |
992d6e91 | 1436 | bool stop_threads; |
0500813f | 1437 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e AG |
1438 | stop_threads = conn_all_vols_unconf(connection) && |
1439 | connection->cstate == C_STANDALONE; | |
0500813f | 1440 | spin_unlock_irq(&connection->resource->req_lock); |
992d6e91 | 1441 | if (stop_threads) { |
668700b4 PR |
1442 | /* ack_receiver thread and ack_sender workqueue are implicitly |
1443 | * stopped by receiver in conn_disconnect() */ | |
bde89a9e AG |
1444 | drbd_thread_stop(&connection->receiver); |
1445 | drbd_thread_stop(&connection->worker); | |
992d6e91 | 1446 | } |
b411b363 PR |
1447 | } |
1448 | ||
0778286a | 1449 | /* Make sure IO is suspended before calling this function(). */ |
b30ab791 | 1450 | static void drbd_suspend_al(struct drbd_device *device) |
0778286a PR |
1451 | { |
1452 | int s = 0; | |
1453 | ||
b30ab791 | 1454 | if (!lc_try_lock(device->act_log)) { |
d0180171 | 1455 | drbd_warn(device, "Failed to lock al in drbd_suspend_al()\n"); |
0778286a PR |
1456 | return; |
1457 | } | |
1458 | ||
b30ab791 | 1459 | drbd_al_shrink(device); |
0500813f | 1460 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 AG |
1461 | if (device->state.conn < C_CONNECTED) |
1462 | s = !test_and_set_bit(AL_SUSPENDED, &device->flags); | |
0500813f | 1463 | spin_unlock_irq(&device->resource->req_lock); |
b30ab791 | 1464 | lc_unlock(device->act_log); |
0778286a PR |
1465 | |
1466 | if (s) | |
d0180171 | 1467 | drbd_info(device, "Suspended AL updates\n"); |
0778286a PR |
1468 | } |
1469 | ||
5979e361 LE |
1470 | |
1471 | static bool should_set_defaults(struct genl_info *info) | |
1472 | { | |
1473 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1474 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1475 | } | |
1476 | ||
5bbcf5e6 | 1477 | static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev) |
d589a21e | 1478 | { |
5bbcf5e6 LE |
1479 | /* This is limited by 16 bit "slot" numbers, |
1480 | * and by available on-disk context storage. | |
1481 | * | |
1482 | * Also (u16)~0 is special (denotes a "free" extent). | |
1483 | * | |
1484 | * One transaction occupies one 4kB on-disk block, | |
1485 | * we have n such blocks in the on disk ring buffer, | |
1486 | * the "current" transaction may fail (n-1), | |
1487 | * and there is 919 slot numbers context information per transaction. | |
1488 | * | |
1489 | * 72 transaction blocks amounts to more than 2**16 context slots, | |
1490 | * so cap there first. | |
1491 | */ | |
1492 | const unsigned int max_al_nr = DRBD_AL_EXTENTS_MAX; | |
1493 | const unsigned int sufficient_on_disk = | |
1494 | (max_al_nr + AL_CONTEXT_PER_TRANSACTION -1) | |
1495 | /AL_CONTEXT_PER_TRANSACTION; | |
d589a21e | 1496 | |
5bbcf5e6 LE |
1497 | unsigned int al_size_4k = bdev->md.al_size_4k; |
1498 | ||
1499 | if (al_size_4k > sufficient_on_disk) | |
1500 | return max_al_nr; | |
1501 | ||
1502 | return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION; | |
d589a21e PR |
1503 | } |
1504 | ||
70df7092 LE |
1505 | static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b) |
1506 | { | |
1507 | return a->disk_barrier != b->disk_barrier || | |
1508 | a->disk_flushes != b->disk_flushes || | |
1509 | a->disk_drain != b->disk_drain; | |
1510 | } | |
1511 | ||
a5ca66c4 PR |
1512 | static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *disk_conf, |
1513 | struct drbd_backing_dev *nbc) | |
c5c23854 | 1514 | { |
a5ca66c4 PR |
1515 | struct request_queue * const q = nbc->backing_bdev->bd_disk->queue; |
1516 | ||
c5c23854 PR |
1517 | if (disk_conf->al_extents < DRBD_AL_EXTENTS_MIN) |
1518 | disk_conf->al_extents = DRBD_AL_EXTENTS_MIN; | |
1519 | if (disk_conf->al_extents > drbd_al_extents_max(nbc)) | |
1520 | disk_conf->al_extents = drbd_al_extents_max(nbc); | |
a5ca66c4 | 1521 | |
48920ff2 | 1522 | if (!blk_queue_discard(q)) { |
65f5be35 LE |
1523 | if (disk_conf->rs_discard_granularity) { |
1524 | disk_conf->rs_discard_granularity = 0; /* disable feature */ | |
1525 | drbd_info(device, "rs_discard_granularity feature disabled\n"); | |
1526 | } | |
a5ca66c4 PR |
1527 | } |
1528 | ||
1529 | if (disk_conf->rs_discard_granularity) { | |
1530 | int orig_value = disk_conf->rs_discard_granularity; | |
1531 | int remainder; | |
1532 | ||
1533 | if (q->limits.discard_granularity > disk_conf->rs_discard_granularity) | |
1534 | disk_conf->rs_discard_granularity = q->limits.discard_granularity; | |
1535 | ||
1536 | remainder = disk_conf->rs_discard_granularity % q->limits.discard_granularity; | |
1537 | disk_conf->rs_discard_granularity += remainder; | |
1538 | ||
1539 | if (disk_conf->rs_discard_granularity > q->limits.max_discard_sectors << 9) | |
1540 | disk_conf->rs_discard_granularity = q->limits.max_discard_sectors << 9; | |
1541 | ||
1542 | if (disk_conf->rs_discard_granularity != orig_value) | |
1543 | drbd_info(device, "rs_discard_granularity changed to %d\n", | |
1544 | disk_conf->rs_discard_granularity); | |
1545 | } | |
c5c23854 PR |
1546 | } |
1547 | ||
f708bd08 LE |
1548 | static int disk_opts_check_al_size(struct drbd_device *device, struct disk_conf *dc) |
1549 | { | |
1550 | int err = -EBUSY; | |
1551 | ||
1552 | if (device->act_log && | |
1553 | device->act_log->nr_elements == dc->al_extents) | |
1554 | return 0; | |
1555 | ||
1556 | drbd_suspend_io(device); | |
1557 | /* If IO completion is currently blocked, we would likely wait | |
1558 | * "forever" for the activity log to become unused. So we don't. */ | |
1559 | if (atomic_read(&device->ap_bio_cnt)) | |
1560 | goto out; | |
1561 | ||
1562 | wait_event(device->al_wait, lc_try_lock(device->act_log)); | |
1563 | drbd_al_shrink(device); | |
1564 | err = drbd_check_al_size(device, dc); | |
1565 | lc_unlock(device->act_log); | |
1566 | wake_up(&device->al_wait); | |
1567 | out: | |
1568 | drbd_resume_io(device); | |
1569 | return err; | |
1570 | } | |
1571 | ||
f399002e LE |
1572 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1573 | { | |
a910b123 | 1574 | struct drbd_config_context adm_ctx; |
f399002e | 1575 | enum drbd_ret_code retcode; |
b30ab791 | 1576 | struct drbd_device *device; |
daeda1cc | 1577 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1578 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1579 | int err, fifo_size; |
f399002e | 1580 | |
a910b123 | 1581 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
f399002e LE |
1582 | if (!adm_ctx.reply_skb) |
1583 | return retcode; | |
1584 | if (retcode != NO_ERROR) | |
9e276872 | 1585 | goto finish; |
f399002e | 1586 | |
b30ab791 | 1587 | device = adm_ctx.device; |
9e276872 | 1588 | mutex_lock(&adm_ctx.resource->adm_mutex); |
f399002e LE |
1589 | |
1590 | /* we also need a disk | |
1591 | * to change the options on */ | |
b30ab791 | 1592 | if (!get_ldev(device)) { |
f399002e LE |
1593 | retcode = ERR_NO_DISK; |
1594 | goto out; | |
1595 | } | |
1596 | ||
daeda1cc | 1597 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1598 | if (!new_disk_conf) { |
f399002e LE |
1599 | retcode = ERR_NOMEM; |
1600 | goto fail; | |
1601 | } | |
1602 | ||
0500813f | 1603 | mutex_lock(&device->resource->conf_update); |
b30ab791 | 1604 | old_disk_conf = device->ldev->disk_conf; |
daeda1cc | 1605 | *new_disk_conf = *old_disk_conf; |
5979e361 | 1606 | if (should_set_defaults(info)) |
b966b5dd | 1607 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1608 | |
5ecc72c3 | 1609 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1610 | if (err && err != -ENOMSG) { |
f399002e | 1611 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 1612 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
8e229434 | 1613 | goto fail_unlock; |
f399002e LE |
1614 | } |
1615 | ||
5ecc72c3 LE |
1616 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1617 | new_disk_conf->resync_rate = 1; | |
f399002e | 1618 | |
a5ca66c4 | 1619 | sanitize_disk_conf(device, new_disk_conf, device->ldev); |
5bbcf5e6 LE |
1620 | |
1621 | if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1622 | new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
f399002e | 1623 | |
5ecc72c3 | 1624 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
b30ab791 | 1625 | if (fifo_size != device->rs_plan_s->size) { |
813472ce PR |
1626 | new_plan = fifo_alloc(fifo_size); |
1627 | if (!new_plan) { | |
d0180171 | 1628 | drbd_err(device, "kmalloc of fifo_buffer failed"); |
f399002e | 1629 | retcode = ERR_NOMEM; |
daeda1cc | 1630 | goto fail_unlock; |
f399002e LE |
1631 | } |
1632 | } | |
1633 | ||
f708bd08 | 1634 | err = disk_opts_check_al_size(device, new_disk_conf); |
f399002e | 1635 | if (err) { |
f708bd08 LE |
1636 | /* Could be just "busy". Ignore? |
1637 | * Introduce dedicated error code? */ | |
1638 | drbd_msg_put_info(adm_ctx.reply_skb, | |
1639 | "Try again without changing current al-extents setting"); | |
f399002e | 1640 | retcode = ERR_NOMEM; |
daeda1cc | 1641 | goto fail_unlock; |
f399002e LE |
1642 | } |
1643 | ||
28bc3b8c | 1644 | lock_all_resources(); |
b30ab791 | 1645 | retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after); |
dc97b708 | 1646 | if (retcode == NO_ERROR) { |
b30ab791 AG |
1647 | rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); |
1648 | drbd_resync_after_changed(device); | |
dc97b708 | 1649 | } |
28bc3b8c | 1650 | unlock_all_resources(); |
f399002e | 1651 | |
daeda1cc PR |
1652 | if (retcode != NO_ERROR) |
1653 | goto fail_unlock; | |
f399002e | 1654 | |
813472ce | 1655 | if (new_plan) { |
b30ab791 AG |
1656 | old_plan = device->rs_plan_s; |
1657 | rcu_assign_pointer(device->rs_plan_s, new_plan); | |
9958c857 | 1658 | } |
9958c857 | 1659 | |
0500813f | 1660 | mutex_unlock(&device->resource->conf_update); |
27eb13e9 | 1661 | |
9a51ab1c | 1662 | if (new_disk_conf->al_updates) |
b30ab791 | 1663 | device->ldev->md.flags &= ~MDF_AL_DISABLED; |
9a51ab1c | 1664 | else |
b30ab791 | 1665 | device->ldev->md.flags |= MDF_AL_DISABLED; |
9a51ab1c | 1666 | |
691631c0 | 1667 | if (new_disk_conf->md_flushes) |
b30ab791 | 1668 | clear_bit(MD_NO_FUA, &device->flags); |
691631c0 | 1669 | else |
b30ab791 | 1670 | set_bit(MD_NO_FUA, &device->flags); |
691631c0 | 1671 | |
70df7092 | 1672 | if (write_ordering_changed(old_disk_conf, new_disk_conf)) |
f6ba8636 | 1673 | drbd_bump_write_ordering(device->resource, NULL, WO_BDEV_FLUSH); |
27eb13e9 | 1674 | |
9de7e14a LE |
1675 | if (old_disk_conf->discard_zeroes_if_aligned != new_disk_conf->discard_zeroes_if_aligned |
1676 | || old_disk_conf->disable_write_same != new_disk_conf->disable_write_same) | |
9104d31a | 1677 | drbd_reconsider_queue_parameters(device, device->ldev, NULL); |
dd4f699d | 1678 | |
b30ab791 | 1679 | drbd_md_sync(device); |
f399002e | 1680 | |
69a22773 AG |
1681 | if (device->state.conn >= C_CONNECTED) { |
1682 | struct drbd_peer_device *peer_device; | |
1683 | ||
1684 | for_each_peer_device(peer_device, device) | |
1685 | drbd_send_sync_param(peer_device); | |
1686 | } | |
f399002e | 1687 | |
daeda1cc PR |
1688 | synchronize_rcu(); |
1689 | kfree(old_disk_conf); | |
813472ce | 1690 | kfree(old_plan); |
b30ab791 | 1691 | mod_timer(&device->request_timer, jiffies + HZ); |
daeda1cc PR |
1692 | goto success; |
1693 | ||
1694 | fail_unlock: | |
0500813f | 1695 | mutex_unlock(&device->resource->conf_update); |
f399002e | 1696 | fail: |
5ecc72c3 | 1697 | kfree(new_disk_conf); |
813472ce | 1698 | kfree(new_plan); |
daeda1cc | 1699 | success: |
b30ab791 | 1700 | put_ldev(device); |
f399002e | 1701 | out: |
9e276872 LE |
1702 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
1703 | finish: | |
a910b123 | 1704 | drbd_adm_finish(&adm_ctx, info, retcode); |
f399002e LE |
1705 | return 0; |
1706 | } | |
1707 | ||
63a7c8ad LE |
1708 | static struct block_device *open_backing_dev(struct drbd_device *device, |
1709 | const char *bdev_path, void *claim_ptr, bool do_bd_link) | |
1710 | { | |
1711 | struct block_device *bdev; | |
1712 | int err = 0; | |
1713 | ||
1714 | bdev = blkdev_get_by_path(bdev_path, | |
1715 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, claim_ptr); | |
1716 | if (IS_ERR(bdev)) { | |
1717 | drbd_err(device, "open(\"%s\") failed with %ld\n", | |
1718 | bdev_path, PTR_ERR(bdev)); | |
1719 | return bdev; | |
1720 | } | |
1721 | ||
1722 | if (!do_bd_link) | |
1723 | return bdev; | |
1724 | ||
1725 | err = bd_link_disk_holder(bdev, device->vdisk); | |
1726 | if (err) { | |
1727 | blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1728 | drbd_err(device, "bd_link_disk_holder(\"%s\", ...) failed with %d\n", | |
1729 | bdev_path, err); | |
1730 | bdev = ERR_PTR(err); | |
1731 | } | |
1732 | return bdev; | |
1733 | } | |
1734 | ||
1735 | static int open_backing_devices(struct drbd_device *device, | |
1736 | struct disk_conf *new_disk_conf, | |
1737 | struct drbd_backing_dev *nbc) | |
1738 | { | |
1739 | struct block_device *bdev; | |
1740 | ||
1741 | bdev = open_backing_dev(device, new_disk_conf->backing_dev, device, true); | |
1742 | if (IS_ERR(bdev)) | |
1743 | return ERR_OPEN_DISK; | |
1744 | nbc->backing_bdev = bdev; | |
1745 | ||
1746 | /* | |
1747 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1748 | * drbd sharing one meta device. TODO in that case, paranoia | |
1749 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1750 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1751 | * should check it for you already; but if you don't, or | |
1752 | * someone fooled it, we need to double check here) | |
1753 | */ | |
1754 | bdev = open_backing_dev(device, new_disk_conf->meta_dev, | |
1755 | /* claim ptr: device, if claimed exclusively; shared drbd_m_holder, | |
1756 | * if potentially shared with other drbd minors */ | |
1757 | (new_disk_conf->meta_dev_idx < 0) ? (void*)device : (void*)drbd_m_holder, | |
1758 | /* avoid double bd_claim_by_disk() for the same (source,target) tuple, | |
1759 | * as would happen with internal metadata. */ | |
1760 | (new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_FLEX_INT && | |
1761 | new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_INTERNAL)); | |
1762 | if (IS_ERR(bdev)) | |
1763 | return ERR_OPEN_MD_DISK; | |
1764 | nbc->md_bdev = bdev; | |
1765 | return NO_ERROR; | |
1766 | } | |
1767 | ||
1768 | static void close_backing_dev(struct drbd_device *device, struct block_device *bdev, | |
1769 | bool do_bd_unlink) | |
1770 | { | |
1771 | if (!bdev) | |
1772 | return; | |
1773 | if (do_bd_unlink) | |
1774 | bd_unlink_disk_holder(bdev, device->vdisk); | |
1775 | blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1776 | } | |
1777 | ||
1778 | void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev) | |
1779 | { | |
1780 | if (ldev == NULL) | |
1781 | return; | |
1782 | ||
1783 | close_backing_dev(device, ldev->md_bdev, ldev->md_bdev != ldev->backing_bdev); | |
1784 | close_backing_dev(device, ldev->backing_bdev, true); | |
1785 | ||
1786 | kfree(ldev->disk_conf); | |
1787 | kfree(ldev); | |
1788 | } | |
1789 | ||
3b98c0c2 | 1790 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1791 | { |
a910b123 | 1792 | struct drbd_config_context adm_ctx; |
b30ab791 | 1793 | struct drbd_device *device; |
44a4d551 LE |
1794 | struct drbd_peer_device *peer_device; |
1795 | struct drbd_connection *connection; | |
3b98c0c2 | 1796 | int err; |
116676ca | 1797 | enum drbd_ret_code retcode; |
b411b363 PR |
1798 | enum determine_dev_size dd; |
1799 | sector_t max_possible_sectors; | |
1800 | sector_t min_md_device_sectors; | |
1801 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1802 | struct disk_conf *new_disk_conf = NULL; |
b411b363 | 1803 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1804 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1805 | union drbd_state ns, os; |
f2024e7c | 1806 | enum drbd_state_rv rv; |
44ed167d | 1807 | struct net_conf *nc; |
b411b363 | 1808 | |
a910b123 | 1809 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
1810 | if (!adm_ctx.reply_skb) |
1811 | return retcode; | |
1812 | if (retcode != NO_ERROR) | |
40cbf085 | 1813 | goto finish; |
b411b363 | 1814 | |
b30ab791 | 1815 | device = adm_ctx.device; |
9e276872 | 1816 | mutex_lock(&adm_ctx.resource->adm_mutex); |
44a4d551 | 1817 | peer_device = first_peer_device(device); |
3b8a44f8 | 1818 | connection = peer_device->connection; |
44a4d551 | 1819 | conn_reconfig_start(connection); |
b411b363 PR |
1820 | |
1821 | /* if you want to reconfigure, please tear down first */ | |
b30ab791 | 1822 | if (device->state.disk > D_DISKLESS) { |
b411b363 PR |
1823 | retcode = ERR_DISK_CONFIGURED; |
1824 | goto fail; | |
1825 | } | |
82f59cc6 LE |
1826 | /* It may just now have detached because of IO error. Make sure |
1827 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1828 | * e.g. if someone calls attach from the on-io-error handler, | |
1829 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
e334f550 | 1830 | wait_event(device->misc_wait, !test_bit(GOING_DISKLESS, &device->flags)); |
b411b363 | 1831 | |
383606e0 | 1832 | /* make sure there is no leftover from previous force-detach attempts */ |
b30ab791 AG |
1833 | clear_bit(FORCE_DETACH, &device->flags); |
1834 | clear_bit(WAS_IO_ERROR, &device->flags); | |
1835 | clear_bit(WAS_READ_ERROR, &device->flags); | |
383606e0 | 1836 | |
0029d624 | 1837 | /* and no leftover from previously aborted resync or verify, either */ |
b30ab791 AG |
1838 | device->rs_total = 0; |
1839 | device->rs_failed = 0; | |
1840 | atomic_set(&device->rs_pending_cnt, 0); | |
0029d624 | 1841 | |
3b98c0c2 | 1842 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1843 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1844 | if (!nbc) { | |
1845 | retcode = ERR_NOMEM; | |
1846 | goto fail; | |
1847 | } | |
9f2247bb PR |
1848 | spin_lock_init(&nbc->md.uuid_lock); |
1849 | ||
daeda1cc PR |
1850 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1851 | if (!new_disk_conf) { | |
1852 | retcode = ERR_NOMEM; | |
b411b363 PR |
1853 | goto fail; |
1854 | } | |
daeda1cc | 1855 | nbc->disk_conf = new_disk_conf; |
b411b363 | 1856 | |
daeda1cc PR |
1857 | set_disk_conf_defaults(new_disk_conf); |
1858 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1859 | if (err) { |
b411b363 | 1860 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 1861 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
1862 | goto fail; |
1863 | } | |
1864 | ||
5bbcf5e6 LE |
1865 | if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) |
1866 | new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
d589a21e | 1867 | |
9958c857 PR |
1868 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1869 | if (!new_plan) { | |
1870 | retcode = ERR_NOMEM; | |
1871 | goto fail; | |
1872 | } | |
1873 | ||
daeda1cc | 1874 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1875 | retcode = ERR_MD_IDX_INVALID; |
1876 | goto fail; | |
1877 | } | |
1878 | ||
44ed167d | 1879 | rcu_read_lock(); |
44a4d551 | 1880 | nc = rcu_dereference(connection->net_conf); |
44ed167d | 1881 | if (nc) { |
daeda1cc | 1882 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1883 | rcu_read_unlock(); |
47ff2d0a | 1884 | retcode = ERR_STONITH_AND_PROT_A; |
28bc3b8c | 1885 | goto fail; |
47ff2d0a PR |
1886 | } |
1887 | } | |
44ed167d | 1888 | rcu_read_unlock(); |
47ff2d0a | 1889 | |
63a7c8ad LE |
1890 | retcode = open_backing_devices(device, new_disk_conf, nbc); |
1891 | if (retcode != NO_ERROR) | |
28bc3b8c | 1892 | goto fail; |
b411b363 | 1893 | |
e525fd89 | 1894 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1895 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1896 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1897 | retcode = ERR_MD_IDX_INVALID; |
28bc3b8c | 1898 | goto fail; |
b411b363 PR |
1899 | } |
1900 | ||
1901 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1902 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1903 | offsetof(struct bm_extent, lce)); |
1904 | if (!resync_lru) { | |
1905 | retcode = ERR_NOMEM; | |
28bc3b8c | 1906 | goto fail; |
b411b363 PR |
1907 | } |
1908 | ||
c04ccaa6 LE |
1909 | /* Read our meta data super block early. |
1910 | * This also sets other on-disk offsets. */ | |
b30ab791 | 1911 | retcode = drbd_md_read(device, nbc); |
c04ccaa6 | 1912 | if (retcode != NO_ERROR) |
28bc3b8c | 1913 | goto fail; |
b411b363 | 1914 | |
a5ca66c4 | 1915 | sanitize_disk_conf(device, new_disk_conf, nbc); |
5bbcf5e6 | 1916 | |
daeda1cc | 1917 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
d0180171 | 1918 | drbd_err(device, "max capacity %llu smaller than disk size %llu\n", |
b411b363 | 1919 | (unsigned long long) drbd_get_max_capacity(nbc), |
daeda1cc | 1920 | (unsigned long long) new_disk_conf->disk_size); |
7948bcdc | 1921 | retcode = ERR_DISK_TOO_SMALL; |
28bc3b8c | 1922 | goto fail; |
b411b363 PR |
1923 | } |
1924 | ||
daeda1cc | 1925 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1926 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1927 | /* at least one MB, otherwise it does not make sense */ | |
1928 | min_md_device_sectors = (2<<10); | |
1929 | } else { | |
1930 | max_possible_sectors = DRBD_MAX_SECTORS; | |
ae8bf312 | 1931 | min_md_device_sectors = MD_128MB_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1932 | } |
1933 | ||
b411b363 | 1934 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
7948bcdc | 1935 | retcode = ERR_MD_DISK_TOO_SMALL; |
d0180171 | 1936 | drbd_warn(device, "refusing attach: md-device too small, " |
b411b363 PR |
1937 | "at least %llu sectors needed for this meta-disk type\n", |
1938 | (unsigned long long) min_md_device_sectors); | |
28bc3b8c | 1939 | goto fail; |
b411b363 PR |
1940 | } |
1941 | ||
1942 | /* Make sure the new disk is big enough | |
1943 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1944 | if (drbd_get_max_capacity(nbc) < | |
b30ab791 | 1945 | drbd_get_capacity(device->this_bdev)) { |
7948bcdc | 1946 | retcode = ERR_DISK_TOO_SMALL; |
28bc3b8c | 1947 | goto fail; |
b411b363 PR |
1948 | } |
1949 | ||
1950 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1951 | ||
1352994b | 1952 | if (nbc->known_size > max_possible_sectors) { |
d0180171 | 1953 | drbd_warn(device, "==> truncating very big lower level device " |
1352994b LE |
1954 | "to currently maximum possible %llu sectors <==\n", |
1955 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1956 | if (new_disk_conf->meta_dev_idx >= 0) |
d0180171 | 1957 | drbd_warn(device, "==>> using internal or flexible " |
1352994b LE |
1958 | "meta data may help <<==\n"); |
1959 | } | |
1960 | ||
b30ab791 | 1961 | drbd_suspend_io(device); |
b411b363 | 1962 | /* also wait for the last barrier ack. */ |
b6dd1a89 LE |
1963 | /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171 |
1964 | * We need a way to either ignore barrier acks for barriers sent before a device | |
1965 | * was attached, or a way to wait for all pending barrier acks to come in. | |
1966 | * As barriers are counted per resource, | |
1967 | * we'd need to suspend io on all devices of a resource. | |
1968 | */ | |
b30ab791 | 1969 | wait_event(device->misc_wait, !atomic_read(&device->ap_pending_cnt) || drbd_suspended(device)); |
b411b363 | 1970 | /* and for any other previously queued work */ |
44a4d551 | 1971 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 | 1972 | |
b30ab791 | 1973 | rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE); |
f2024e7c | 1974 | retcode = rv; /* FIXME: Type mismatch. */ |
b30ab791 | 1975 | drbd_resume_io(device); |
f2024e7c | 1976 | if (rv < SS_SUCCESS) |
28bc3b8c | 1977 | goto fail; |
b411b363 | 1978 | |
b30ab791 | 1979 | if (!get_ldev_if_state(device, D_ATTACHING)) |
b411b363 PR |
1980 | goto force_diskless; |
1981 | ||
b30ab791 AG |
1982 | if (!device->bitmap) { |
1983 | if (drbd_bm_init(device)) { | |
b411b363 PR |
1984 | retcode = ERR_NOMEM; |
1985 | goto force_diskless_dec; | |
1986 | } | |
1987 | } | |
1988 | ||
fe43ed97 LE |
1989 | if (device->state.pdsk != D_UP_TO_DATE && device->ed_uuid && |
1990 | (device->state.role == R_PRIMARY || device->state.peer == R_PRIMARY) && | |
1991 | (device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
d0180171 | 1992 | drbd_err(device, "Can only attach to data with current UUID=%016llX\n", |
b30ab791 | 1993 | (unsigned long long)device->ed_uuid); |
b411b363 PR |
1994 | retcode = ERR_DATA_NOT_CURRENT; |
1995 | goto force_diskless_dec; | |
1996 | } | |
1997 | ||
1998 | /* Since we are diskless, fix the activity log first... */ | |
b30ab791 | 1999 | if (drbd_check_al_size(device, new_disk_conf)) { |
b411b363 PR |
2000 | retcode = ERR_NOMEM; |
2001 | goto force_diskless_dec; | |
2002 | } | |
2003 | ||
2004 | /* Prevent shrinking of consistent devices ! */ | |
4ef2a4f4 LE |
2005 | { |
2006 | unsigned long long nsz = drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0); | |
2007 | unsigned long long eff = nbc->md.la_size_sect; | |
2008 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && nsz < eff) { | |
2009 | if (nsz == nbc->disk_conf->disk_size) { | |
2010 | drbd_warn(device, "truncating a consistent device during attach (%llu < %llu)\n", nsz, eff); | |
2011 | } else { | |
2012 | drbd_warn(device, "refusing to truncate a consistent device (%llu < %llu)\n", nsz, eff); | |
2013 | drbd_msg_sprintf_info(adm_ctx.reply_skb, | |
2014 | "To-be-attached device has last effective > current size, and is consistent\n" | |
2015 | "(%llu > %llu sectors). Refusing to attach.", eff, nsz); | |
2016 | retcode = ERR_IMPLICIT_SHRINK; | |
2017 | goto force_diskless_dec; | |
2018 | } | |
2019 | } | |
b411b363 PR |
2020 | } |
2021 | ||
28bc3b8c AG |
2022 | lock_all_resources(); |
2023 | retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after); | |
2024 | if (retcode != NO_ERROR) { | |
2025 | unlock_all_resources(); | |
2026 | goto force_diskless_dec; | |
2027 | } | |
2028 | ||
b411b363 PR |
2029 | /* Reset the "barriers don't work" bits here, then force meta data to |
2030 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 2031 | if (new_disk_conf->md_flushes) |
b30ab791 | 2032 | clear_bit(MD_NO_FUA, &device->flags); |
b411b363 | 2033 | else |
b30ab791 | 2034 | set_bit(MD_NO_FUA, &device->flags); |
b411b363 PR |
2035 | |
2036 | /* Point of no return reached. | |
2037 | * Devices and memory are no longer released by error cleanup below. | |
b30ab791 | 2038 | * now device takes over responsibility, and the state engine should |
b411b363 | 2039 | * clean it up somewhere. */ |
0b0ba1ef | 2040 | D_ASSERT(device, device->ldev == NULL); |
b30ab791 AG |
2041 | device->ldev = nbc; |
2042 | device->resync = resync_lru; | |
2043 | device->rs_plan_s = new_plan; | |
b411b363 PR |
2044 | nbc = NULL; |
2045 | resync_lru = NULL; | |
daeda1cc | 2046 | new_disk_conf = NULL; |
9958c857 | 2047 | new_plan = NULL; |
b411b363 | 2048 | |
1ec317d3 | 2049 | drbd_resync_after_changed(device); |
f6ba8636 | 2050 | drbd_bump_write_ordering(device->resource, device->ldev, WO_BDEV_FLUSH); |
28bc3b8c | 2051 | unlock_all_resources(); |
b411b363 | 2052 | |
b30ab791 AG |
2053 | if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY)) |
2054 | set_bit(CRASHED_PRIMARY, &device->flags); | |
b411b363 | 2055 | else |
b30ab791 | 2056 | clear_bit(CRASHED_PRIMARY, &device->flags); |
b411b363 | 2057 | |
b30ab791 | 2058 | if (drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) && |
6bbf53ca | 2059 | !(device->state.role == R_PRIMARY && device->resource->susp_nod)) |
b30ab791 | 2060 | set_bit(CRASHED_PRIMARY, &device->flags); |
b411b363 | 2061 | |
b30ab791 AG |
2062 | device->send_cnt = 0; |
2063 | device->recv_cnt = 0; | |
2064 | device->read_cnt = 0; | |
2065 | device->writ_cnt = 0; | |
b411b363 | 2066 | |
9104d31a | 2067 | drbd_reconsider_queue_parameters(device, device->ldev, NULL); |
b411b363 PR |
2068 | |
2069 | /* If I am currently not R_PRIMARY, | |
2070 | * but meta data primary indicator is set, | |
2071 | * I just now recover from a hard crash, | |
2072 | * and have been R_PRIMARY before that crash. | |
2073 | * | |
2074 | * Now, if I had no connection before that crash | |
2075 | * (have been degraded R_PRIMARY), chances are that | |
2076 | * I won't find my peer now either. | |
2077 | * | |
2078 | * In that case, and _only_ in that case, | |
2079 | * we use the degr-wfc-timeout instead of the default, | |
2080 | * so we can automatically recover from a crash of a | |
2081 | * degraded but active "cluster" after a certain timeout. | |
2082 | */ | |
b30ab791 AG |
2083 | clear_bit(USE_DEGR_WFC_T, &device->flags); |
2084 | if (device->state.role != R_PRIMARY && | |
2085 | drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) && | |
2086 | !drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND)) | |
2087 | set_bit(USE_DEGR_WFC_T, &device->flags); | |
b411b363 | 2088 | |
b30ab791 | 2089 | dd = drbd_determine_dev_size(device, 0, NULL); |
d752b269 | 2090 | if (dd <= DS_ERROR) { |
b411b363 PR |
2091 | retcode = ERR_NOMEM_BITMAP; |
2092 | goto force_diskless_dec; | |
e96c9633 | 2093 | } else if (dd == DS_GREW) |
b30ab791 | 2094 | set_bit(RESYNC_AFTER_NEG, &device->flags); |
b411b363 | 2095 | |
b30ab791 AG |
2096 | if (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) || |
2097 | (test_bit(CRASHED_PRIMARY, &device->flags) && | |
2098 | drbd_md_test_flag(device->ldev, MDF_AL_DISABLED))) { | |
d0180171 | 2099 | drbd_info(device, "Assuming that all blocks are out of sync " |
b411b363 | 2100 | "(aka FullSync)\n"); |
b30ab791 | 2101 | if (drbd_bitmap_io(device, &drbd_bmio_set_n_write, |
20ceb2b2 | 2102 | "set_n_write from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
2103 | retcode = ERR_IO_MD_DISK; |
2104 | goto force_diskless_dec; | |
2105 | } | |
2106 | } else { | |
b30ab791 | 2107 | if (drbd_bitmap_io(device, &drbd_bm_read, |
22ab6a30 | 2108 | "read from attaching", BM_LOCKED_MASK)) { |
19f843aa LE |
2109 | retcode = ERR_IO_MD_DISK; |
2110 | goto force_diskless_dec; | |
2111 | } | |
b411b363 PR |
2112 | } |
2113 | ||
b30ab791 AG |
2114 | if (_drbd_bm_total_weight(device) == drbd_bm_bits(device)) |
2115 | drbd_suspend_al(device); /* IO is still suspended here... */ | |
0778286a | 2116 | |
0500813f | 2117 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 | 2118 | os = drbd_read_state(device); |
78bae59b | 2119 | ns = os; |
b411b363 PR |
2120 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
2121 | otherwise investigate MDF_WasUpToDate... | |
2122 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
2123 | otherwise into D_CONSISTENT state. | |
2124 | */ | |
b30ab791 AG |
2125 | if (drbd_md_test_flag(device->ldev, MDF_CONSISTENT)) { |
2126 | if (drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE)) | |
b411b363 PR |
2127 | ns.disk = D_CONSISTENT; |
2128 | else | |
2129 | ns.disk = D_OUTDATED; | |
2130 | } else { | |
2131 | ns.disk = D_INCONSISTENT; | |
2132 | } | |
2133 | ||
b30ab791 | 2134 | if (drbd_md_test_flag(device->ldev, MDF_PEER_OUT_DATED)) |
b411b363 PR |
2135 | ns.pdsk = D_OUTDATED; |
2136 | ||
daeda1cc PR |
2137 | rcu_read_lock(); |
2138 | if (ns.disk == D_CONSISTENT && | |
b30ab791 | 2139 | (ns.pdsk == D_OUTDATED || rcu_dereference(device->ldev->disk_conf)->fencing == FP_DONT_CARE)) |
b411b363 PR |
2140 | ns.disk = D_UP_TO_DATE; |
2141 | ||
2142 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
2143 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
2144 | this point, because drbd_request_state() modifies these | |
2145 | flags. */ | |
2146 | ||
b30ab791 AG |
2147 | if (rcu_dereference(device->ldev->disk_conf)->al_updates) |
2148 | device->ldev->md.flags &= ~MDF_AL_DISABLED; | |
9a51ab1c | 2149 | else |
b30ab791 | 2150 | device->ldev->md.flags |= MDF_AL_DISABLED; |
9a51ab1c PR |
2151 | |
2152 | rcu_read_unlock(); | |
2153 | ||
b411b363 PR |
2154 | /* In case we are C_CONNECTED postpone any decision on the new disk |
2155 | state after the negotiation phase. */ | |
b30ab791 AG |
2156 | if (device->state.conn == C_CONNECTED) { |
2157 | device->new_state_tmp.i = ns.i; | |
b411b363 PR |
2158 | ns.i = os.i; |
2159 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
2160 | |
2161 | /* We expect to receive up-to-date UUIDs soon. | |
2162 | To avoid a race in receive_state, free p_uuid while | |
2163 | holding req_lock. I.e. atomic with the state change */ | |
b30ab791 AG |
2164 | kfree(device->p_uuid); |
2165 | device->p_uuid = NULL; | |
b411b363 PR |
2166 | } |
2167 | ||
b30ab791 | 2168 | rv = _drbd_set_state(device, ns, CS_VERBOSE, NULL); |
0500813f | 2169 | spin_unlock_irq(&device->resource->req_lock); |
b411b363 PR |
2170 | |
2171 | if (rv < SS_SUCCESS) | |
2172 | goto force_diskless_dec; | |
2173 | ||
b30ab791 | 2174 | mod_timer(&device->request_timer, jiffies + HZ); |
cdfda633 | 2175 | |
b30ab791 AG |
2176 | if (device->state.role == R_PRIMARY) |
2177 | device->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
b411b363 | 2178 | else |
b30ab791 | 2179 | device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; |
b411b363 | 2180 | |
b30ab791 AG |
2181 | drbd_md_mark_dirty(device); |
2182 | drbd_md_sync(device); | |
b411b363 | 2183 | |
b30ab791 AG |
2184 | kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE); |
2185 | put_ldev(device); | |
44a4d551 | 2186 | conn_reconfig_done(connection); |
9e276872 | 2187 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
a910b123 | 2188 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2189 | return 0; |
2190 | ||
2191 | force_diskless_dec: | |
b30ab791 | 2192 | put_ldev(device); |
b411b363 | 2193 | force_diskless: |
b30ab791 AG |
2194 | drbd_force_state(device, NS(disk, D_DISKLESS)); |
2195 | drbd_md_sync(device); | |
b411b363 | 2196 | fail: |
44a4d551 | 2197 | conn_reconfig_done(connection); |
b411b363 | 2198 | if (nbc) { |
63a7c8ad LE |
2199 | close_backing_dev(device, nbc->md_bdev, nbc->md_bdev != nbc->backing_bdev); |
2200 | close_backing_dev(device, nbc->backing_bdev, true); | |
b411b363 PR |
2201 | kfree(nbc); |
2202 | } | |
daeda1cc | 2203 | kfree(new_disk_conf); |
b411b363 | 2204 | lc_destroy(resync_lru); |
9958c857 | 2205 | kfree(new_plan); |
9e276872 | 2206 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
40cbf085 | 2207 | finish: |
a910b123 | 2208 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2209 | return 0; |
2210 | } | |
2211 | ||
b30ab791 | 2212 | static int adm_detach(struct drbd_device *device, int force) |
b411b363 | 2213 | { |
cdfda633 | 2214 | if (force) { |
b30ab791 AG |
2215 | set_bit(FORCE_DETACH, &device->flags); |
2216 | drbd_force_state(device, NS(disk, D_FAILED)); | |
33d32fa7 | 2217 | return SS_SUCCESS; |
02ee8f95 PR |
2218 | } |
2219 | ||
33d32fa7 | 2220 | return drbd_request_detach_interruptible(device); |
b411b363 PR |
2221 | } |
2222 | ||
82f59cc6 LE |
2223 | /* Detaching the disk is a process in multiple stages. First we need to lock |
2224 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
2225 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
2226 | * internal references as well. | |
2227 | * Only then we have finally detached. */ | |
3b98c0c2 | 2228 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2229 | { |
a910b123 | 2230 | struct drbd_config_context adm_ctx; |
116676ca | 2231 | enum drbd_ret_code retcode; |
cdfda633 PR |
2232 | struct detach_parms parms = { }; |
2233 | int err; | |
b411b363 | 2234 | |
a910b123 | 2235 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2236 | if (!adm_ctx.reply_skb) |
2237 | return retcode; | |
2238 | if (retcode != NO_ERROR) | |
2239 | goto out; | |
b411b363 | 2240 | |
cdfda633 PR |
2241 | if (info->attrs[DRBD_NLA_DETACH_PARMS]) { |
2242 | err = detach_parms_from_attrs(&parms, info); | |
2243 | if (err) { | |
2244 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 2245 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
cdfda633 PR |
2246 | goto out; |
2247 | } | |
b411b363 PR |
2248 | } |
2249 | ||
9e276872 | 2250 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 2251 | retcode = adm_detach(adm_ctx.device, parms.force_detach); |
9e276872 | 2252 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2253 | out: |
a910b123 | 2254 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2255 | return 0; |
2256 | } | |
b411b363 | 2257 | |
bde89a9e | 2258 | static bool conn_resync_running(struct drbd_connection *connection) |
f399002e | 2259 | { |
c06ece6b | 2260 | struct drbd_peer_device *peer_device; |
695d08fa | 2261 | bool rv = false; |
f399002e LE |
2262 | int vnr; |
2263 | ||
695d08fa | 2264 | rcu_read_lock(); |
c06ece6b AG |
2265 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2266 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2267 | if (device->state.conn == C_SYNC_SOURCE || |
2268 | device->state.conn == C_SYNC_TARGET || | |
2269 | device->state.conn == C_PAUSED_SYNC_S || | |
2270 | device->state.conn == C_PAUSED_SYNC_T) { | |
695d08fa PR |
2271 | rv = true; |
2272 | break; | |
2273 | } | |
b411b363 | 2274 | } |
695d08fa | 2275 | rcu_read_unlock(); |
b411b363 | 2276 | |
695d08fa | 2277 | return rv; |
f399002e | 2278 | } |
47ff2d0a | 2279 | |
bde89a9e | 2280 | static bool conn_ov_running(struct drbd_connection *connection) |
f399002e | 2281 | { |
c06ece6b | 2282 | struct drbd_peer_device *peer_device; |
695d08fa | 2283 | bool rv = false; |
f399002e LE |
2284 | int vnr; |
2285 | ||
695d08fa | 2286 | rcu_read_lock(); |
c06ece6b AG |
2287 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2288 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2289 | if (device->state.conn == C_VERIFY_S || |
2290 | device->state.conn == C_VERIFY_T) { | |
695d08fa PR |
2291 | rv = true; |
2292 | break; | |
47ff2d0a PR |
2293 | } |
2294 | } | |
695d08fa | 2295 | rcu_read_unlock(); |
b411b363 | 2296 | |
695d08fa | 2297 | return rv; |
f399002e | 2298 | } |
422028b1 | 2299 | |
cd64397c | 2300 | static enum drbd_ret_code |
270eb5c9 | 2301 | _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_conf *new_net_conf) |
cd64397c | 2302 | { |
c06ece6b | 2303 | struct drbd_peer_device *peer_device; |
cd64397c | 2304 | int i; |
b411b363 | 2305 | |
270eb5c9 AG |
2306 | if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 100) { |
2307 | if (new_net_conf->wire_protocol != old_net_conf->wire_protocol) | |
dcb20d1a | 2308 | return ERR_NEED_APV_100; |
b411b363 | 2309 | |
270eb5c9 | 2310 | if (new_net_conf->two_primaries != old_net_conf->two_primaries) |
dcb20d1a PR |
2311 | return ERR_NEED_APV_100; |
2312 | ||
270eb5c9 | 2313 | if (strcmp(new_net_conf->integrity_alg, old_net_conf->integrity_alg)) |
dcb20d1a | 2314 | return ERR_NEED_APV_100; |
b411b363 PR |
2315 | } |
2316 | ||
270eb5c9 | 2317 | if (!new_net_conf->two_primaries && |
bde89a9e AG |
2318 | conn_highest_role(connection) == R_PRIMARY && |
2319 | conn_highest_peer(connection) == R_PRIMARY) | |
dcb20d1a | 2320 | return ERR_NEED_ALLOW_TWO_PRI; |
b411b363 | 2321 | |
270eb5c9 AG |
2322 | if (new_net_conf->two_primaries && |
2323 | (new_net_conf->wire_protocol != DRBD_PROT_C)) | |
cd64397c PR |
2324 | return ERR_NOT_PROTO_C; |
2325 | ||
c06ece6b AG |
2326 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2327 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2328 | if (get_ldev(device)) { |
2329 | enum drbd_fencing_p fp = rcu_dereference(device->ldev->disk_conf)->fencing; | |
2330 | put_ldev(device); | |
270eb5c9 | 2331 | if (new_net_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 2332 | return ERR_STONITH_AND_PROT_A; |
b411b363 | 2333 | } |
270eb5c9 | 2334 | if (device->state.role == R_PRIMARY && new_net_conf->discard_my_data) |
eb12010e | 2335 | return ERR_DISCARD_IMPOSSIBLE; |
b411b363 PR |
2336 | } |
2337 | ||
270eb5c9 | 2338 | if (new_net_conf->on_congestion != OC_BLOCK && new_net_conf->wire_protocol != DRBD_PROT_A) |
cd64397c | 2339 | return ERR_CONG_NOT_PROTO_A; |
b411b363 | 2340 | |
cd64397c PR |
2341 | return NO_ERROR; |
2342 | } | |
b411b363 | 2343 | |
44ed167d | 2344 | static enum drbd_ret_code |
270eb5c9 | 2345 | check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf) |
44ed167d | 2346 | { |
e9d5d4a0 | 2347 | enum drbd_ret_code rv; |
c06ece6b | 2348 | struct drbd_peer_device *peer_device; |
44ed167d | 2349 | int i; |
b411b363 | 2350 | |
44ed167d | 2351 | rcu_read_lock(); |
270eb5c9 | 2352 | rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf); |
44ed167d | 2353 | rcu_read_unlock(); |
b411b363 | 2354 | |
179e20b8 | 2355 | /* connection->peer_devices protected by genl_lock() here */ |
c06ece6b AG |
2356 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2357 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2358 | if (!device->bitmap) { |
2359 | if (drbd_bm_init(device)) | |
44ed167d | 2360 | return ERR_NOMEM; |
b411b363 PR |
2361 | } |
2362 | } | |
2363 | ||
44ed167d PR |
2364 | return rv; |
2365 | } | |
b411b363 | 2366 | |
0fd0ea06 | 2367 | struct crypto { |
3d0e6375 KC |
2368 | struct crypto_shash *verify_tfm; |
2369 | struct crypto_shash *csums_tfm; | |
9534d671 | 2370 | struct crypto_shash *cram_hmac_tfm; |
3d0e6375 | 2371 | struct crypto_shash *integrity_tfm; |
0fd0ea06 | 2372 | }; |
b411b363 | 2373 | |
0fd0ea06 | 2374 | static int |
9534d671 | 2375 | alloc_shash(struct crypto_shash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
2376 | { |
2377 | if (!tfm_name[0]) | |
2378 | return NO_ERROR; | |
b411b363 | 2379 | |
9534d671 HX |
2380 | *tfm = crypto_alloc_shash(tfm_name, 0, 0); |
2381 | if (IS_ERR(*tfm)) { | |
2382 | *tfm = NULL; | |
2383 | return err_alg; | |
2384 | } | |
2385 | ||
2386 | return NO_ERROR; | |
2387 | } | |
2388 | ||
0fd0ea06 | 2389 | static enum drbd_ret_code |
270eb5c9 | 2390 | alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf) |
0fd0ea06 PR |
2391 | { |
2392 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
2393 | enum drbd_ret_code rv; | |
0fd0ea06 | 2394 | |
3d0e6375 | 2395 | rv = alloc_shash(&crypto->csums_tfm, new_net_conf->csums_alg, |
9534d671 | 2396 | ERR_CSUMS_ALG); |
0fd0ea06 PR |
2397 | if (rv != NO_ERROR) |
2398 | return rv; | |
3d0e6375 | 2399 | rv = alloc_shash(&crypto->verify_tfm, new_net_conf->verify_alg, |
9534d671 | 2400 | ERR_VERIFY_ALG); |
0fd0ea06 PR |
2401 | if (rv != NO_ERROR) |
2402 | return rv; | |
3d0e6375 | 2403 | rv = alloc_shash(&crypto->integrity_tfm, new_net_conf->integrity_alg, |
9534d671 | 2404 | ERR_INTEGRITY_ALG); |
0fd0ea06 PR |
2405 | if (rv != NO_ERROR) |
2406 | return rv; | |
270eb5c9 | 2407 | if (new_net_conf->cram_hmac_alg[0] != 0) { |
0fd0ea06 | 2408 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", |
270eb5c9 | 2409 | new_net_conf->cram_hmac_alg); |
b411b363 | 2410 | |
9534d671 HX |
2411 | rv = alloc_shash(&crypto->cram_hmac_tfm, hmac_name, |
2412 | ERR_AUTH_ALG); | |
b411b363 PR |
2413 | } |
2414 | ||
0fd0ea06 PR |
2415 | return rv; |
2416 | } | |
b411b363 | 2417 | |
0fd0ea06 PR |
2418 | static void free_crypto(struct crypto *crypto) |
2419 | { | |
9534d671 | 2420 | crypto_free_shash(crypto->cram_hmac_tfm); |
3d0e6375 KC |
2421 | crypto_free_shash(crypto->integrity_tfm); |
2422 | crypto_free_shash(crypto->csums_tfm); | |
2423 | crypto_free_shash(crypto->verify_tfm); | |
0fd0ea06 | 2424 | } |
b411b363 | 2425 | |
f399002e LE |
2426 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
2427 | { | |
a910b123 | 2428 | struct drbd_config_context adm_ctx; |
f399002e | 2429 | enum drbd_ret_code retcode; |
bde89a9e | 2430 | struct drbd_connection *connection; |
270eb5c9 | 2431 | struct net_conf *old_net_conf, *new_net_conf = NULL; |
f399002e LE |
2432 | int err; |
2433 | int ovr; /* online verify running */ | |
2434 | int rsr; /* re-sync running */ | |
0fd0ea06 | 2435 | struct crypto crypto = { }; |
b411b363 | 2436 | |
a910b123 | 2437 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION); |
f399002e LE |
2438 | if (!adm_ctx.reply_skb) |
2439 | return retcode; | |
2440 | if (retcode != NO_ERROR) | |
9e276872 | 2441 | goto finish; |
b411b363 | 2442 | |
bde89a9e | 2443 | connection = adm_ctx.connection; |
9e276872 | 2444 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2445 | |
270eb5c9 AG |
2446 | new_net_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
2447 | if (!new_net_conf) { | |
f399002e LE |
2448 | retcode = ERR_NOMEM; |
2449 | goto out; | |
2450 | } | |
b411b363 | 2451 | |
bde89a9e | 2452 | conn_reconfig_start(connection); |
b411b363 | 2453 | |
bde89a9e | 2454 | mutex_lock(&connection->data.mutex); |
0500813f | 2455 | mutex_lock(&connection->resource->conf_update); |
270eb5c9 | 2456 | old_net_conf = connection->net_conf; |
2561b9c1 | 2457 | |
270eb5c9 | 2458 | if (!old_net_conf) { |
a910b123 | 2459 | drbd_msg_put_info(adm_ctx.reply_skb, "net conf missing, try connect"); |
f399002e | 2460 | retcode = ERR_INVALID_REQUEST; |
2561b9c1 PR |
2461 | goto fail; |
2462 | } | |
2463 | ||
270eb5c9 | 2464 | *new_net_conf = *old_net_conf; |
5979e361 | 2465 | if (should_set_defaults(info)) |
270eb5c9 | 2466 | set_net_conf_defaults(new_net_conf); |
f399002e | 2467 | |
270eb5c9 | 2468 | err = net_conf_from_attrs_for_change(new_net_conf, info); |
c75b9b10 | 2469 | if (err && err != -ENOMSG) { |
f399002e | 2470 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2471 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
f399002e | 2472 | goto fail; |
2561b9c1 | 2473 | } |
b411b363 | 2474 | |
270eb5c9 | 2475 | retcode = check_net_options(connection, new_net_conf); |
cd64397c PR |
2476 | if (retcode != NO_ERROR) |
2477 | goto fail; | |
b411b363 | 2478 | |
f399002e | 2479 | /* re-sync running */ |
bde89a9e | 2480 | rsr = conn_resync_running(connection); |
270eb5c9 | 2481 | if (rsr && strcmp(new_net_conf->csums_alg, old_net_conf->csums_alg)) { |
f399002e | 2482 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 2483 | goto fail; |
b411b363 PR |
2484 | } |
2485 | ||
f399002e | 2486 | /* online verify running */ |
bde89a9e | 2487 | ovr = conn_ov_running(connection); |
270eb5c9 | 2488 | if (ovr && strcmp(new_net_conf->verify_alg, old_net_conf->verify_alg)) { |
0fd0ea06 | 2489 | retcode = ERR_VERIFY_RUNNING; |
b411b363 | 2490 | goto fail; |
f399002e | 2491 | } |
b411b363 | 2492 | |
270eb5c9 | 2493 | retcode = alloc_crypto(&crypto, new_net_conf); |
0fd0ea06 | 2494 | if (retcode != NO_ERROR) |
b411b363 | 2495 | goto fail; |
f399002e | 2496 | |
270eb5c9 | 2497 | rcu_assign_pointer(connection->net_conf, new_net_conf); |
f399002e LE |
2498 | |
2499 | if (!rsr) { | |
3d0e6375 | 2500 | crypto_free_shash(connection->csums_tfm); |
bde89a9e | 2501 | connection->csums_tfm = crypto.csums_tfm; |
0fd0ea06 | 2502 | crypto.csums_tfm = NULL; |
f399002e LE |
2503 | } |
2504 | if (!ovr) { | |
3d0e6375 | 2505 | crypto_free_shash(connection->verify_tfm); |
bde89a9e | 2506 | connection->verify_tfm = crypto.verify_tfm; |
0fd0ea06 | 2507 | crypto.verify_tfm = NULL; |
b411b363 PR |
2508 | } |
2509 | ||
3d0e6375 | 2510 | crypto_free_shash(connection->integrity_tfm); |
bde89a9e AG |
2511 | connection->integrity_tfm = crypto.integrity_tfm; |
2512 | if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100) | |
2513 | /* Do this without trying to take connection->data.mutex again. */ | |
2514 | __drbd_send_protocol(connection, P_PROTOCOL_UPDATE); | |
0fd0ea06 | 2515 | |
9534d671 | 2516 | crypto_free_shash(connection->cram_hmac_tfm); |
bde89a9e | 2517 | connection->cram_hmac_tfm = crypto.cram_hmac_tfm; |
0fd0ea06 | 2518 | |
0500813f | 2519 | mutex_unlock(&connection->resource->conf_update); |
bde89a9e | 2520 | mutex_unlock(&connection->data.mutex); |
91fd4dad | 2521 | synchronize_rcu(); |
270eb5c9 | 2522 | kfree(old_net_conf); |
91fd4dad | 2523 | |
69a22773 AG |
2524 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
2525 | struct drbd_peer_device *peer_device; | |
2526 | int vnr; | |
2527 | ||
2528 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) | |
2529 | drbd_send_sync_param(peer_device); | |
2530 | } | |
f399002e | 2531 | |
91fd4dad PR |
2532 | goto done; |
2533 | ||
b411b363 | 2534 | fail: |
0500813f | 2535 | mutex_unlock(&connection->resource->conf_update); |
bde89a9e | 2536 | mutex_unlock(&connection->data.mutex); |
0fd0ea06 | 2537 | free_crypto(&crypto); |
270eb5c9 | 2538 | kfree(new_net_conf); |
91fd4dad | 2539 | done: |
bde89a9e | 2540 | conn_reconfig_done(connection); |
f399002e | 2541 | out: |
9e276872 LE |
2542 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
2543 | finish: | |
a910b123 | 2544 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2545 | return 0; |
2546 | } | |
2547 | ||
a2972846 AG |
2548 | static void connection_to_info(struct connection_info *info, |
2549 | struct drbd_connection *connection) | |
2550 | { | |
2551 | info->conn_connection_state = connection->cstate; | |
2552 | info->conn_role = conn_highest_peer(connection); | |
2553 | } | |
2554 | ||
2555 | static void peer_device_to_info(struct peer_device_info *info, | |
2556 | struct drbd_peer_device *peer_device) | |
2557 | { | |
2558 | struct drbd_device *device = peer_device->device; | |
2559 | ||
2560 | info->peer_repl_state = | |
2561 | max_t(enum drbd_conns, C_WF_REPORT_PARAMS, device->state.conn); | |
2562 | info->peer_disk_state = device->state.pdsk; | |
2563 | info->peer_resync_susp_user = device->state.user_isp; | |
2564 | info->peer_resync_susp_peer = device->state.peer_isp; | |
2565 | info->peer_resync_susp_dependency = device->state.aftr_isp; | |
2566 | } | |
2567 | ||
3b98c0c2 | 2568 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2569 | { |
a2972846 AG |
2570 | struct connection_info connection_info; |
2571 | enum drbd_notification_type flags; | |
2572 | unsigned int peer_devices = 0; | |
a910b123 | 2573 | struct drbd_config_context adm_ctx; |
c06ece6b | 2574 | struct drbd_peer_device *peer_device; |
270eb5c9 | 2575 | struct net_conf *old_net_conf, *new_net_conf = NULL; |
0fd0ea06 | 2576 | struct crypto crypto = { }; |
77c556f6 | 2577 | struct drbd_resource *resource; |
bde89a9e | 2578 | struct drbd_connection *connection; |
3b98c0c2 LE |
2579 | enum drbd_ret_code retcode; |
2580 | int i; | |
2581 | int err; | |
b411b363 | 2582 | |
a910b123 | 2583 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
b411b363 | 2584 | |
3b98c0c2 LE |
2585 | if (!adm_ctx.reply_skb) |
2586 | return retcode; | |
2587 | if (retcode != NO_ERROR) | |
2588 | goto out; | |
089c075d | 2589 | if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) { |
a910b123 | 2590 | drbd_msg_put_info(adm_ctx.reply_skb, "connection endpoint(s) missing"); |
089c075d AG |
2591 | retcode = ERR_INVALID_REQUEST; |
2592 | goto out; | |
2593 | } | |
b411b363 | 2594 | |
089c075d AG |
2595 | /* No need for _rcu here. All reconfiguration is |
2596 | * strictly serialized on genl_lock(). We are protected against | |
2597 | * concurrent reconfiguration/addition/deletion */ | |
77c556f6 AG |
2598 | for_each_resource(resource, &drbd_resources) { |
2599 | for_each_connection(connection, resource) { | |
2600 | if (nla_len(adm_ctx.my_addr) == connection->my_addr_len && | |
2601 | !memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr, | |
2602 | connection->my_addr_len)) { | |
2603 | retcode = ERR_LOCAL_ADDR; | |
2604 | goto out; | |
2605 | } | |
b411b363 | 2606 | |
77c556f6 AG |
2607 | if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len && |
2608 | !memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr, | |
2609 | connection->peer_addr_len)) { | |
2610 | retcode = ERR_PEER_ADDR; | |
2611 | goto out; | |
2612 | } | |
089c075d | 2613 | } |
b411b363 PR |
2614 | } |
2615 | ||
9e276872 | 2616 | mutex_lock(&adm_ctx.resource->adm_mutex); |
3ab706fe | 2617 | connection = first_connection(adm_ctx.resource); |
bde89a9e | 2618 | conn_reconfig_start(connection); |
b411b363 | 2619 | |
bde89a9e | 2620 | if (connection->cstate > C_STANDALONE) { |
b411b363 | 2621 | retcode = ERR_NET_CONFIGURED; |
b411b363 PR |
2622 | goto fail; |
2623 | } | |
2624 | ||
a209b4ae | 2625 | /* allocation not in the IO path, drbdsetup / netlink process context */ |
270eb5c9 AG |
2626 | new_net_conf = kzalloc(sizeof(*new_net_conf), GFP_KERNEL); |
2627 | if (!new_net_conf) { | |
b411b363 | 2628 | retcode = ERR_NOMEM; |
b411b363 PR |
2629 | goto fail; |
2630 | } | |
2631 | ||
270eb5c9 | 2632 | set_net_conf_defaults(new_net_conf); |
b411b363 | 2633 | |
270eb5c9 | 2634 | err = net_conf_from_attrs(new_net_conf, info); |
25e40932 | 2635 | if (err && err != -ENOMSG) { |
b411b363 | 2636 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2637 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2638 | goto fail; |
2639 | } | |
2640 | ||
270eb5c9 | 2641 | retcode = check_net_options(connection, new_net_conf); |
cd64397c | 2642 | if (retcode != NO_ERROR) |
422028b1 | 2643 | goto fail; |
b411b363 | 2644 | |
270eb5c9 | 2645 | retcode = alloc_crypto(&crypto, new_net_conf); |
0fd0ea06 PR |
2646 | if (retcode != NO_ERROR) |
2647 | goto fail; | |
b411b363 | 2648 | |
270eb5c9 | 2649 | ((char *)new_net_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
7b4e4d31 | 2650 | |
b5043c5e | 2651 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 | 2652 | |
0500813f | 2653 | mutex_lock(&adm_ctx.resource->conf_update); |
270eb5c9 AG |
2654 | old_net_conf = connection->net_conf; |
2655 | if (old_net_conf) { | |
b411b363 | 2656 | retcode = ERR_NET_CONFIGURED; |
0500813f | 2657 | mutex_unlock(&adm_ctx.resource->conf_update); |
b411b363 PR |
2658 | goto fail; |
2659 | } | |
270eb5c9 | 2660 | rcu_assign_pointer(connection->net_conf, new_net_conf); |
b411b363 | 2661 | |
bde89a9e AG |
2662 | conn_free_crypto(connection); |
2663 | connection->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
2664 | connection->integrity_tfm = crypto.integrity_tfm; | |
2665 | connection->csums_tfm = crypto.csums_tfm; | |
2666 | connection->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2667 | |
bde89a9e AG |
2668 | connection->my_addr_len = nla_len(adm_ctx.my_addr); |
2669 | memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len); | |
2670 | connection->peer_addr_len = nla_len(adm_ctx.peer_addr); | |
2671 | memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len); | |
b411b363 | 2672 | |
a2972846 AG |
2673 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2674 | peer_devices++; | |
2675 | } | |
2676 | ||
2677 | connection_to_info(&connection_info, connection); | |
2678 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
2679 | mutex_lock(¬ification_mutex); | |
2680 | notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags); | |
2681 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { | |
2682 | struct peer_device_info peer_device_info; | |
2683 | ||
2684 | peer_device_to_info(&peer_device_info, peer_device); | |
2685 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
2686 | notify_peer_device_state(NULL, 0, peer_device, &peer_device_info, NOTIFY_CREATE | flags); | |
2687 | } | |
2688 | mutex_unlock(¬ification_mutex); | |
0500813f | 2689 | mutex_unlock(&adm_ctx.resource->conf_update); |
b411b363 | 2690 | |
695d08fa | 2691 | rcu_read_lock(); |
c06ece6b AG |
2692 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2693 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2694 | device->send_cnt = 0; |
2695 | device->recv_cnt = 0; | |
b411b363 | 2696 | } |
695d08fa | 2697 | rcu_read_unlock(); |
b411b363 | 2698 | |
bde89a9e | 2699 | retcode = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE); |
b411b363 | 2700 | |
bde89a9e | 2701 | conn_reconfig_done(connection); |
9e276872 | 2702 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
a910b123 | 2703 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 | 2704 | return 0; |
b411b363 | 2705 | |
b411b363 | 2706 | fail: |
0fd0ea06 | 2707 | free_crypto(&crypto); |
270eb5c9 | 2708 | kfree(new_net_conf); |
b411b363 | 2709 | |
bde89a9e | 2710 | conn_reconfig_done(connection); |
9e276872 | 2711 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2712 | out: |
a910b123 | 2713 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2714 | return 0; |
2715 | } | |
2716 | ||
bde89a9e | 2717 | static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force) |
85f75dd7 | 2718 | { |
be80ff88 | 2719 | enum drbd_conns cstate; |
85f75dd7 | 2720 | enum drbd_state_rv rv; |
85f75dd7 | 2721 | |
be80ff88 | 2722 | repeat: |
bde89a9e | 2723 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), |
f3dfa40a | 2724 | force ? CS_HARD : 0); |
85f75dd7 LE |
2725 | |
2726 | switch (rv) { | |
2727 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2728 | break; |
85f75dd7 LE |
2729 | case SS_ALREADY_STANDALONE: |
2730 | return SS_SUCCESS; | |
2731 | case SS_PRIMARY_NOP: | |
2732 | /* Our state checking code wants to see the peer outdated. */ | |
bde89a9e | 2733 | rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0); |
2bd5ed5d PR |
2734 | |
2735 | if (rv == SS_OUTDATE_WO_CONN) /* lost connection before graceful disconnect succeeded */ | |
bde89a9e | 2736 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE); |
2bd5ed5d | 2737 | |
85f75dd7 LE |
2738 | break; |
2739 | case SS_CW_FAILED_BY_PEER: | |
be80ff88 LE |
2740 | spin_lock_irq(&connection->resource->req_lock); |
2741 | cstate = connection->cstate; | |
2742 | spin_unlock_irq(&connection->resource->req_lock); | |
2743 | if (cstate <= C_WF_CONNECTION) | |
2744 | goto repeat; | |
85f75dd7 | 2745 | /* The peer probably wants to see us outdated. */ |
bde89a9e | 2746 | rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, |
85f75dd7 LE |
2747 | disk, D_OUTDATED), 0); |
2748 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
bde89a9e | 2749 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), |
f3dfa40a | 2750 | CS_HARD); |
b411b363 | 2751 | } |
85f75dd7 LE |
2752 | break; |
2753 | default:; | |
2754 | /* no special handling necessary */ | |
2755 | } | |
2756 | ||
f3dfa40a LE |
2757 | if (rv >= SS_SUCCESS) { |
2758 | enum drbd_state_rv rv2; | |
2759 | /* No one else can reconfigure the network while I am here. | |
2760 | * The state handling only uses drbd_thread_stop_nowait(), | |
2761 | * we want to really wait here until the receiver is no more. | |
2762 | */ | |
9693da23 | 2763 | drbd_thread_stop(&connection->receiver); |
f3dfa40a LE |
2764 | |
2765 | /* Race breaker. This additional state change request may be | |
2766 | * necessary, if this was a forced disconnect during a receiver | |
2767 | * restart. We may have "killed" the receiver thread just | |
8fe60551 | 2768 | * after drbd_receiver() returned. Typically, we should be |
f3dfa40a LE |
2769 | * C_STANDALONE already, now, and this becomes a no-op. |
2770 | */ | |
bde89a9e | 2771 | rv2 = conn_request_state(connection, NS(conn, C_STANDALONE), |
f3dfa40a LE |
2772 | CS_VERBOSE | CS_HARD); |
2773 | if (rv2 < SS_SUCCESS) | |
1ec861eb | 2774 | drbd_err(connection, |
f3dfa40a LE |
2775 | "unexpected rv2=%d in conn_try_disconnect()\n", |
2776 | rv2); | |
a2972846 AG |
2777 | /* Unlike in DRBD 9, the state engine has generated |
2778 | * NOTIFY_DESTROY events before clearing connection->net_conf. */ | |
b411b363 | 2779 | } |
85f75dd7 LE |
2780 | return rv; |
2781 | } | |
b411b363 | 2782 | |
3b98c0c2 | 2783 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2784 | { |
a910b123 | 2785 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2786 | struct disconnect_parms parms; |
bde89a9e | 2787 | struct drbd_connection *connection; |
85f75dd7 | 2788 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2789 | enum drbd_ret_code retcode; |
2790 | int err; | |
2561b9c1 | 2791 | |
a910b123 | 2792 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION); |
3b98c0c2 LE |
2793 | if (!adm_ctx.reply_skb) |
2794 | return retcode; | |
2795 | if (retcode != NO_ERROR) | |
2561b9c1 | 2796 | goto fail; |
b411b363 | 2797 | |
bde89a9e | 2798 | connection = adm_ctx.connection; |
3b98c0c2 LE |
2799 | memset(&parms, 0, sizeof(parms)); |
2800 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2801 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2802 | if (err) { |
2803 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 2804 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2805 | goto fail; |
2806 | } | |
2807 | } | |
2808 | ||
9e276872 | 2809 | mutex_lock(&adm_ctx.resource->adm_mutex); |
bde89a9e | 2810 | rv = conn_try_disconnect(connection, parms.force_disconnect); |
85f75dd7 | 2811 | if (rv < SS_SUCCESS) |
f3dfa40a LE |
2812 | retcode = rv; /* FIXME: Type mismatch. */ |
2813 | else | |
2814 | retcode = NO_ERROR; | |
9e276872 | 2815 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2816 | fail: |
a910b123 | 2817 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2818 | return 0; |
2819 | } | |
2820 | ||
b30ab791 | 2821 | void resync_after_online_grow(struct drbd_device *device) |
b411b363 PR |
2822 | { |
2823 | int iass; /* I am sync source */ | |
2824 | ||
d0180171 | 2825 | drbd_info(device, "Resync of new storage after online grow\n"); |
b30ab791 AG |
2826 | if (device->state.role != device->state.peer) |
2827 | iass = (device->state.role == R_PRIMARY); | |
b411b363 | 2828 | else |
a6b32bc3 | 2829 | iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags); |
b411b363 PR |
2830 | |
2831 | if (iass) | |
b30ab791 | 2832 | drbd_start_resync(device, C_SYNC_SOURCE); |
b411b363 | 2833 | else |
b30ab791 | 2834 | _drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); |
b411b363 PR |
2835 | } |
2836 | ||
3b98c0c2 | 2837 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2838 | { |
a910b123 | 2839 | struct drbd_config_context adm_ctx; |
daeda1cc | 2840 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 | 2841 | struct resize_parms rs; |
b30ab791 | 2842 | struct drbd_device *device; |
3b98c0c2 | 2843 | enum drbd_ret_code retcode; |
b411b363 | 2844 | enum determine_dev_size dd; |
d752b269 | 2845 | bool change_al_layout = false; |
6495d2c6 | 2846 | enum dds_flags ddsf; |
daeda1cc | 2847 | sector_t u_size; |
3b98c0c2 | 2848 | int err; |
b411b363 | 2849 | |
a910b123 | 2850 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2851 | if (!adm_ctx.reply_skb) |
2852 | return retcode; | |
2853 | if (retcode != NO_ERROR) | |
9e276872 | 2854 | goto finish; |
3b98c0c2 | 2855 | |
9e276872 | 2856 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
2857 | device = adm_ctx.device; |
2858 | if (!get_ldev(device)) { | |
d752b269 PR |
2859 | retcode = ERR_NO_DISK; |
2860 | goto fail; | |
2861 | } | |
2862 | ||
3b98c0c2 | 2863 | memset(&rs, 0, sizeof(struct resize_parms)); |
b30ab791 AG |
2864 | rs.al_stripes = device->ldev->md.al_stripes; |
2865 | rs.al_stripe_size = device->ldev->md.al_stripe_size_4k * 4; | |
3b98c0c2 | 2866 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { |
f399002e | 2867 | err = resize_parms_from_attrs(&rs, info); |
b411b363 | 2868 | if (err) { |
3b98c0c2 | 2869 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2870 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
d752b269 | 2871 | goto fail_ldev; |
b411b363 PR |
2872 | } |
2873 | } | |
2874 | ||
b30ab791 | 2875 | if (device->state.conn > C_CONNECTED) { |
b411b363 | 2876 | retcode = ERR_RESIZE_RESYNC; |
d752b269 | 2877 | goto fail_ldev; |
b411b363 | 2878 | } |
b411b363 | 2879 | |
b30ab791 AG |
2880 | if (device->state.role == R_SECONDARY && |
2881 | device->state.peer == R_SECONDARY) { | |
b411b363 | 2882 | retcode = ERR_NO_PRIMARY; |
d752b269 | 2883 | goto fail_ldev; |
b411b363 | 2884 | } |
b411b363 | 2885 | |
a6b32bc3 | 2886 | if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) { |
6495d2c6 | 2887 | retcode = ERR_NEED_APV_93; |
9bcd2521 | 2888 | goto fail_ldev; |
6495d2c6 PR |
2889 | } |
2890 | ||
daeda1cc | 2891 | rcu_read_lock(); |
b30ab791 | 2892 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
daeda1cc PR |
2893 | rcu_read_unlock(); |
2894 | if (u_size != (sector_t)rs.resize_size) { | |
2895 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2896 | if (!new_disk_conf) { | |
778f271d | 2897 | retcode = ERR_NOMEM; |
9bcd2521 | 2898 | goto fail_ldev; |
778f271d PR |
2899 | } |
2900 | } | |
2901 | ||
b30ab791 AG |
2902 | if (device->ldev->md.al_stripes != rs.al_stripes || |
2903 | device->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) { | |
d752b269 PR |
2904 | u32 al_size_k = rs.al_stripes * rs.al_stripe_size; |
2905 | ||
2906 | if (al_size_k > (16 * 1024 * 1024)) { | |
2907 | retcode = ERR_MD_LAYOUT_TOO_BIG; | |
2908 | goto fail_ldev; | |
2909 | } | |
2910 | ||
2911 | if (al_size_k < MD_32kB_SECT/2) { | |
2912 | retcode = ERR_MD_LAYOUT_TOO_SMALL; | |
2913 | goto fail_ldev; | |
2914 | } | |
2915 | ||
cdc6af8d | 2916 | if (device->state.conn != C_CONNECTED && !rs.resize_force) { |
d752b269 PR |
2917 | retcode = ERR_MD_LAYOUT_CONNECTED; |
2918 | goto fail_ldev; | |
2919 | } | |
2920 | ||
2921 | change_al_layout = true; | |
2922 | } | |
2923 | ||
b30ab791 AG |
2924 | if (device->ldev->known_size != drbd_get_capacity(device->ldev->backing_bdev)) |
2925 | device->ldev->known_size = drbd_get_capacity(device->ldev->backing_bdev); | |
b411b363 | 2926 | |
daeda1cc | 2927 | if (new_disk_conf) { |
0500813f | 2928 | mutex_lock(&device->resource->conf_update); |
b30ab791 | 2929 | old_disk_conf = device->ldev->disk_conf; |
daeda1cc PR |
2930 | *new_disk_conf = *old_disk_conf; |
2931 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
b30ab791 | 2932 | rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); |
0500813f | 2933 | mutex_unlock(&device->resource->conf_update); |
daeda1cc PR |
2934 | synchronize_rcu(); |
2935 | kfree(old_disk_conf); | |
70644786 | 2936 | new_disk_conf = NULL; |
b411b363 PR |
2937 | } |
2938 | ||
6495d2c6 | 2939 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
b30ab791 AG |
2940 | dd = drbd_determine_dev_size(device, ddsf, change_al_layout ? &rs : NULL); |
2941 | drbd_md_sync(device); | |
2942 | put_ldev(device); | |
e96c9633 | 2943 | if (dd == DS_ERROR) { |
b411b363 PR |
2944 | retcode = ERR_NOMEM_BITMAP; |
2945 | goto fail; | |
d752b269 PR |
2946 | } else if (dd == DS_ERROR_SPACE_MD) { |
2947 | retcode = ERR_MD_LAYOUT_NO_FIT; | |
2948 | goto fail; | |
2949 | } else if (dd == DS_ERROR_SHRINK) { | |
2950 | retcode = ERR_IMPLICIT_SHRINK; | |
2951 | goto fail; | |
b411b363 | 2952 | } |
778f271d | 2953 | |
b30ab791 | 2954 | if (device->state.conn == C_CONNECTED) { |
e96c9633 | 2955 | if (dd == DS_GREW) |
b30ab791 | 2956 | set_bit(RESIZE_PENDING, &device->flags); |
b411b363 | 2957 | |
69a22773 AG |
2958 | drbd_send_uuids(first_peer_device(device)); |
2959 | drbd_send_sizes(first_peer_device(device), 1, ddsf); | |
778f271d PR |
2960 | } |
2961 | ||
b411b363 | 2962 | fail: |
9e276872 LE |
2963 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
2964 | finish: | |
a910b123 | 2965 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 | 2966 | return 0; |
b411b363 | 2967 | |
9bcd2521 | 2968 | fail_ldev: |
b30ab791 | 2969 | put_ldev(device); |
70644786 | 2970 | kfree(new_disk_conf); |
9bcd2521 | 2971 | goto fail; |
b411b363 | 2972 | } |
b411b363 | 2973 | |
f399002e | 2974 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2975 | { |
a910b123 | 2976 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2977 | enum drbd_ret_code retcode; |
b57a1e27 | 2978 | struct res_opts res_opts; |
f399002e | 2979 | int err; |
b411b363 | 2980 | |
a910b123 | 2981 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
2982 | if (!adm_ctx.reply_skb) |
2983 | return retcode; | |
2984 | if (retcode != NO_ERROR) | |
2985 | goto fail; | |
b411b363 | 2986 | |
eb6bea67 | 2987 | res_opts = adm_ctx.resource->res_opts; |
5979e361 | 2988 | if (should_set_defaults(info)) |
b966b5dd | 2989 | set_res_opts_defaults(&res_opts); |
b411b363 | 2990 | |
b57a1e27 | 2991 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2992 | if (err && err != -ENOMSG) { |
b411b363 | 2993 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2994 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2995 | goto fail; |
2996 | } | |
2997 | ||
9e276872 | 2998 | mutex_lock(&adm_ctx.resource->adm_mutex); |
eb6bea67 | 2999 | err = set_resource_options(adm_ctx.resource, &res_opts); |
afbbfa88 AG |
3000 | if (err) { |
3001 | retcode = ERR_INVALID_REQUEST; | |
3002 | if (err == -ENOMEM) | |
3003 | retcode = ERR_NOMEM; | |
b411b363 | 3004 | } |
9e276872 | 3005 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
b411b363 | 3006 | |
b411b363 | 3007 | fail: |
a910b123 | 3008 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3009 | return 0; |
3010 | } | |
3011 | ||
3b98c0c2 | 3012 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3013 | { |
a910b123 | 3014 | struct drbd_config_context adm_ctx; |
b30ab791 | 3015 | struct drbd_device *device; |
3b98c0c2 LE |
3016 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
3017 | ||
a910b123 | 3018 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3019 | if (!adm_ctx.reply_skb) |
3020 | return retcode; | |
3021 | if (retcode != NO_ERROR) | |
3022 | goto out; | |
3023 | ||
b30ab791 | 3024 | device = adm_ctx.device; |
8fe39aac PR |
3025 | if (!get_ldev(device)) { |
3026 | retcode = ERR_NO_DISK; | |
3027 | goto out; | |
3028 | } | |
3029 | ||
3030 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 3031 | |
194bfb32 | 3032 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
3033 | * resync just being finished, wait for it before requesting a new resync. |
3034 | * Also wait for it's after_state_ch(). */ | |
b30ab791 AG |
3035 | drbd_suspend_io(device); |
3036 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
b5043c5e | 3037 | drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work); |
194bfb32 | 3038 | |
0b2dafcd PR |
3039 | /* If we happen to be C_STANDALONE R_SECONDARY, just change to |
3040 | * D_INCONSISTENT, and set all bits in the bitmap. Otherwise, | |
3041 | * try to start a resync handshake as sync target for full sync. | |
9376d9f8 | 3042 | */ |
b30ab791 AG |
3043 | if (device->state.conn == C_STANDALONE && device->state.role == R_SECONDARY) { |
3044 | retcode = drbd_request_state(device, NS(disk, D_INCONSISTENT)); | |
0b2dafcd | 3045 | if (retcode >= SS_SUCCESS) { |
b30ab791 | 3046 | if (drbd_bitmap_io(device, &drbd_bmio_set_n_write, |
0b2dafcd PR |
3047 | "set_n_write from invalidate", BM_LOCKED_MASK)) |
3048 | retcode = ERR_IO_MD_DISK; | |
3049 | } | |
3050 | } else | |
b30ab791 AG |
3051 | retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_T)); |
3052 | drbd_resume_io(device); | |
9e276872 | 3053 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
8fe39aac | 3054 | put_ldev(device); |
3b98c0c2 | 3055 | out: |
a910b123 | 3056 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3057 | return 0; |
3058 | } | |
3059 | ||
3b98c0c2 LE |
3060 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
3061 | union drbd_state mask, union drbd_state val) | |
b411b363 | 3062 | { |
a910b123 | 3063 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 3064 | enum drbd_ret_code retcode; |
194bfb32 | 3065 | |
a910b123 | 3066 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3067 | if (!adm_ctx.reply_skb) |
3068 | return retcode; | |
3069 | if (retcode != NO_ERROR) | |
3070 | goto out; | |
b411b363 | 3071 | |
9e276872 | 3072 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 3073 | retcode = drbd_request_state(adm_ctx.device, mask, val); |
9e276872 | 3074 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3075 | out: |
a910b123 | 3076 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3077 | return 0; |
3078 | } | |
3079 | ||
8fe39aac | 3080 | static int drbd_bmio_set_susp_al(struct drbd_device *device) __must_hold(local) |
0778286a PR |
3081 | { |
3082 | int rv; | |
3083 | ||
b30ab791 AG |
3084 | rv = drbd_bmio_set_n_write(device); |
3085 | drbd_suspend_al(device); | |
0778286a PR |
3086 | return rv; |
3087 | } | |
3088 | ||
3b98c0c2 | 3089 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3090 | { |
a910b123 | 3091 | struct drbd_config_context adm_ctx; |
25b0d6c8 | 3092 | int retcode; /* drbd_ret_code, drbd_state_rv */ |
b30ab791 | 3093 | struct drbd_device *device; |
25b0d6c8 | 3094 | |
a910b123 | 3095 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
25b0d6c8 PR |
3096 | if (!adm_ctx.reply_skb) |
3097 | return retcode; | |
3098 | if (retcode != NO_ERROR) | |
3099 | goto out; | |
3100 | ||
b30ab791 | 3101 | device = adm_ctx.device; |
8fe39aac PR |
3102 | if (!get_ldev(device)) { |
3103 | retcode = ERR_NO_DISK; | |
3104 | goto out; | |
3105 | } | |
3106 | ||
3107 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 3108 | |
194bfb32 | 3109 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
3110 | * resync just being finished, wait for it before requesting a new resync. |
3111 | * Also wait for it's after_state_ch(). */ | |
b30ab791 AG |
3112 | drbd_suspend_io(device); |
3113 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
b5043c5e | 3114 | drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work); |
194bfb32 | 3115 | |
0b2dafcd PR |
3116 | /* If we happen to be C_STANDALONE R_PRIMARY, just set all bits |
3117 | * in the bitmap. Otherwise, try to start a resync handshake | |
3118 | * as sync source for full sync. | |
3119 | */ | |
b30ab791 | 3120 | if (device->state.conn == C_STANDALONE && device->state.role == R_PRIMARY) { |
0b2dafcd PR |
3121 | /* The peer will get a resync upon connect anyways. Just make that |
3122 | into a full resync. */ | |
b30ab791 | 3123 | retcode = drbd_request_state(device, NS(pdsk, D_INCONSISTENT)); |
0b2dafcd | 3124 | if (retcode >= SS_SUCCESS) { |
b30ab791 | 3125 | if (drbd_bitmap_io(device, &drbd_bmio_set_susp_al, |
0b2dafcd PR |
3126 | "set_n_write from invalidate_peer", |
3127 | BM_LOCKED_SET_ALLOWED)) | |
3128 | retcode = ERR_IO_MD_DISK; | |
3129 | } | |
3130 | } else | |
b30ab791 AG |
3131 | retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_S)); |
3132 | drbd_resume_io(device); | |
9e276872 | 3133 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
8fe39aac | 3134 | put_ldev(device); |
25b0d6c8 | 3135 | out: |
a910b123 | 3136 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3137 | return 0; |
3138 | } | |
3139 | ||
3b98c0c2 | 3140 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3141 | { |
a910b123 | 3142 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 3143 | enum drbd_ret_code retcode; |
b411b363 | 3144 | |
a910b123 | 3145 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3146 | if (!adm_ctx.reply_skb) |
3147 | return retcode; | |
3148 | if (retcode != NO_ERROR) | |
3149 | goto out; | |
b411b363 | 3150 | |
9e276872 | 3151 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 3152 | if (drbd_request_state(adm_ctx.device, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
3b98c0c2 | 3153 | retcode = ERR_PAUSE_IS_SET; |
9e276872 | 3154 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3155 | out: |
a910b123 | 3156 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3157 | return 0; |
3158 | } | |
3159 | ||
3b98c0c2 | 3160 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3161 | { |
a910b123 | 3162 | struct drbd_config_context adm_ctx; |
da9fbc27 | 3163 | union drbd_dev_state s; |
3b98c0c2 LE |
3164 | enum drbd_ret_code retcode; |
3165 | ||
a910b123 | 3166 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3167 | if (!adm_ctx.reply_skb) |
3168 | return retcode; | |
3169 | if (retcode != NO_ERROR) | |
3170 | goto out; | |
b411b363 | 3171 | |
9e276872 | 3172 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
3173 | if (drbd_request_state(adm_ctx.device, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
3174 | s = adm_ctx.device->state; | |
cd88d030 PR |
3175 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
3176 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
3177 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
3178 | } else { | |
3179 | retcode = ERR_PAUSE_IS_CLEAR; | |
3180 | } | |
3181 | } | |
9e276872 | 3182 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3183 | out: |
a910b123 | 3184 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3185 | return 0; |
3186 | } | |
3187 | ||
3b98c0c2 | 3188 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3189 | { |
3b98c0c2 | 3190 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
3191 | } |
3192 | ||
3b98c0c2 | 3193 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3194 | { |
a910b123 | 3195 | struct drbd_config_context adm_ctx; |
b30ab791 | 3196 | struct drbd_device *device; |
3b98c0c2 LE |
3197 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
3198 | ||
a910b123 | 3199 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3200 | if (!adm_ctx.reply_skb) |
3201 | return retcode; | |
3202 | if (retcode != NO_ERROR) | |
3203 | goto out; | |
3204 | ||
9e276872 | 3205 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
3206 | device = adm_ctx.device; |
3207 | if (test_bit(NEW_CUR_UUID, &device->flags)) { | |
9fa48269 LE |
3208 | if (get_ldev_if_state(device, D_ATTACHING)) { |
3209 | drbd_uuid_new_current(device); | |
3210 | put_ldev(device); | |
3211 | } else { | |
3212 | /* This is effectively a multi-stage "forced down". | |
3213 | * The NEW_CUR_UUID bit is supposedly only set, if we | |
3214 | * lost the replication connection, and are configured | |
3215 | * to freeze IO and wait for some fence-peer handler. | |
3216 | * So we still don't have a replication connection. | |
3217 | * And now we don't have a local disk either. After | |
3218 | * resume, we will fail all pending and new IO, because | |
3219 | * we don't have any data anymore. Which means we will | |
3220 | * eventually be able to terminate all users of this | |
3221 | * device, and then take it down. By bumping the | |
3222 | * "effective" data uuid, we make sure that you really | |
3223 | * need to tear down before you reconfigure, we will | |
3224 | * the refuse to re-connect or re-attach (because no | |
3225 | * matching real data uuid exists). | |
3226 | */ | |
3227 | u64 val; | |
3228 | get_random_bytes(&val, sizeof(u64)); | |
3229 | drbd_set_ed_uuid(device, val); | |
3230 | drbd_warn(device, "Resumed without access to data; please tear down before attempting to re-configure.\n"); | |
3231 | } | |
b30ab791 | 3232 | clear_bit(NEW_CUR_UUID, &device->flags); |
43a5182c | 3233 | } |
b30ab791 AG |
3234 | drbd_suspend_io(device); |
3235 | retcode = drbd_request_state(device, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); | |
3b98c0c2 | 3236 | if (retcode == SS_SUCCESS) { |
b30ab791 | 3237 | if (device->state.conn < C_CONNECTED) |
a6b32bc3 | 3238 | tl_clear(first_peer_device(device)->connection); |
b30ab791 | 3239 | if (device->state.disk == D_DISKLESS || device->state.disk == D_FAILED) |
a6b32bc3 | 3240 | tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO); |
265be2d0 | 3241 | } |
b30ab791 | 3242 | drbd_resume_io(device); |
9e276872 | 3243 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3244 | out: |
a910b123 | 3245 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3246 | return 0; |
3247 | } | |
3248 | ||
3b98c0c2 | 3249 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3250 | { |
3b98c0c2 | 3251 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
3252 | } |
3253 | ||
251b8f8e AG |
3254 | static int nla_put_drbd_cfg_context(struct sk_buff *skb, |
3255 | struct drbd_resource *resource, | |
3256 | struct drbd_connection *connection, | |
3257 | struct drbd_device *device) | |
b411b363 | 3258 | { |
543cc10b | 3259 | struct nlattr *nla; |
ae0be8de | 3260 | nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_CONTEXT); |
543cc10b LE |
3261 | if (!nla) |
3262 | goto nla_put_failure; | |
251b8f8e AG |
3263 | if (device && |
3264 | nla_put_u32(skb, T_ctx_volume, device->vnr)) | |
26ec9287 | 3265 | goto nla_put_failure; |
f597f6b8 | 3266 | if (nla_put_string(skb, T_ctx_resource_name, resource->name)) |
26ec9287 | 3267 | goto nla_put_failure; |
251b8f8e AG |
3268 | if (connection) { |
3269 | if (connection->my_addr_len && | |
3270 | nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr)) | |
3271 | goto nla_put_failure; | |
3272 | if (connection->peer_addr_len && | |
3273 | nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr)) | |
3274 | goto nla_put_failure; | |
3275 | } | |
543cc10b LE |
3276 | nla_nest_end(skb, nla); |
3277 | return 0; | |
b411b363 | 3278 | |
543cc10b LE |
3279 | nla_put_failure: |
3280 | if (nla) | |
3281 | nla_nest_cancel(skb, nla); | |
3282 | return -EMSGSIZE; | |
3283 | } | |
b411b363 | 3284 | |
a55bbd37 AG |
3285 | /* |
3286 | * The generic netlink dump callbacks are called outside the genl_lock(), so | |
3287 | * they cannot use the simple attribute parsing code which uses global | |
3288 | * attribute tables. | |
3289 | */ | |
3290 | static struct nlattr *find_cfg_context_attr(const struct nlmsghdr *nlh, int attr) | |
3291 | { | |
3292 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
3293 | const int maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; | |
3294 | struct nlattr *nla; | |
3295 | ||
3296 | nla = nla_find(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen), | |
3297 | DRBD_NLA_CFG_CONTEXT); | |
3298 | if (!nla) | |
3299 | return NULL; | |
3300 | return drbd_nla_find_nested(maxtype, nla, __nla_type(attr)); | |
3301 | } | |
3302 | ||
3303 | static void resource_to_info(struct resource_info *, struct drbd_resource *); | |
3304 | ||
3305 | int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb) | |
3306 | { | |
3307 | struct drbd_genlmsghdr *dh; | |
3308 | struct drbd_resource *resource; | |
3309 | struct resource_info resource_info; | |
3310 | struct resource_statistics resource_statistics; | |
3311 | int err; | |
3312 | ||
3313 | rcu_read_lock(); | |
3314 | if (cb->args[0]) { | |
3315 | for_each_resource_rcu(resource, &drbd_resources) | |
3316 | if (resource == (struct drbd_resource *)cb->args[0]) | |
3317 | goto found_resource; | |
3318 | err = 0; /* resource was probably deleted */ | |
3319 | goto out; | |
3320 | } | |
3321 | resource = list_entry(&drbd_resources, | |
3322 | struct drbd_resource, resources); | |
3323 | ||
3324 | found_resource: | |
3325 | list_for_each_entry_continue_rcu(resource, &drbd_resources, resources) { | |
3326 | goto put_result; | |
3327 | } | |
3328 | err = 0; | |
3329 | goto out; | |
3330 | ||
3331 | put_result: | |
3332 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3333 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3334 | NLM_F_MULTI, DRBD_ADM_GET_RESOURCES); | |
3335 | err = -ENOMEM; | |
3336 | if (!dh) | |
3337 | goto out; | |
3338 | dh->minor = -1U; | |
3339 | dh->ret_code = NO_ERROR; | |
3340 | err = nla_put_drbd_cfg_context(skb, resource, NULL, NULL); | |
3341 | if (err) | |
3342 | goto out; | |
3343 | err = res_opts_to_skb(skb, &resource->res_opts, !capable(CAP_SYS_ADMIN)); | |
3344 | if (err) | |
3345 | goto out; | |
3346 | resource_to_info(&resource_info, resource); | |
3347 | err = resource_info_to_skb(skb, &resource_info, !capable(CAP_SYS_ADMIN)); | |
3348 | if (err) | |
3349 | goto out; | |
3350 | resource_statistics.res_stat_write_ordering = resource->write_ordering; | |
3351 | err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN)); | |
3352 | if (err) | |
3353 | goto out; | |
3354 | cb->args[0] = (long)resource; | |
3355 | genlmsg_end(skb, dh); | |
3356 | err = 0; | |
3357 | ||
3358 | out: | |
3359 | rcu_read_unlock(); | |
3360 | if (err) | |
3361 | return err; | |
3362 | return skb->len; | |
3363 | } | |
3364 | ||
3365 | static void device_to_statistics(struct device_statistics *s, | |
3366 | struct drbd_device *device) | |
3367 | { | |
3368 | memset(s, 0, sizeof(*s)); | |
3369 | s->dev_upper_blocked = !may_inc_ap_bio(device); | |
3370 | if (get_ldev(device)) { | |
3371 | struct drbd_md *md = &device->ldev->md; | |
3372 | u64 *history_uuids = (u64 *)s->history_uuids; | |
3373 | struct request_queue *q; | |
3374 | int n; | |
3375 | ||
3376 | spin_lock_irq(&md->uuid_lock); | |
3377 | s->dev_current_uuid = md->uuid[UI_CURRENT]; | |
3378 | BUILD_BUG_ON(sizeof(s->history_uuids) < UI_HISTORY_END - UI_HISTORY_START + 1); | |
3379 | for (n = 0; n < UI_HISTORY_END - UI_HISTORY_START + 1; n++) | |
3380 | history_uuids[n] = md->uuid[UI_HISTORY_START + n]; | |
3381 | for (; n < HISTORY_UUIDS; n++) | |
3382 | history_uuids[n] = 0; | |
3383 | s->history_uuids_len = HISTORY_UUIDS; | |
3384 | spin_unlock_irq(&md->uuid_lock); | |
3385 | ||
3386 | s->dev_disk_flags = md->flags; | |
3387 | q = bdev_get_queue(device->ldev->backing_bdev); | |
3388 | s->dev_lower_blocked = | |
dc3b17cc | 3389 | bdi_congested(q->backing_dev_info, |
a55bbd37 AG |
3390 | (1 << WB_async_congested) | |
3391 | (1 << WB_sync_congested)); | |
3392 | put_ldev(device); | |
3393 | } | |
3394 | s->dev_size = drbd_get_capacity(device->this_bdev); | |
3395 | s->dev_read = device->read_cnt; | |
3396 | s->dev_write = device->writ_cnt; | |
3397 | s->dev_al_writes = device->al_writ_cnt; | |
3398 | s->dev_bm_writes = device->bm_writ_cnt; | |
3399 | s->dev_upper_pending = atomic_read(&device->ap_bio_cnt); | |
3400 | s->dev_lower_pending = atomic_read(&device->local_cnt); | |
3401 | s->dev_al_suspended = test_bit(AL_SUSPENDED, &device->flags); | |
3402 | s->dev_exposed_data_uuid = device->ed_uuid; | |
3403 | } | |
3404 | ||
3405 | static int put_resource_in_arg0(struct netlink_callback *cb, int holder_nr) | |
3406 | { | |
3407 | if (cb->args[0]) { | |
3408 | struct drbd_resource *resource = | |
3409 | (struct drbd_resource *)cb->args[0]; | |
3410 | kref_put(&resource->kref, drbd_destroy_resource); | |
3411 | } | |
3412 | ||
3413 | return 0; | |
3414 | } | |
3415 | ||
3416 | int drbd_adm_dump_devices_done(struct netlink_callback *cb) { | |
3417 | return put_resource_in_arg0(cb, 7); | |
3418 | } | |
3419 | ||
3420 | static void device_to_info(struct device_info *, struct drbd_device *); | |
3421 | ||
3422 | int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb) | |
3423 | { | |
3424 | struct nlattr *resource_filter; | |
3425 | struct drbd_resource *resource; | |
3426 | struct drbd_device *uninitialized_var(device); | |
3427 | int minor, err, retcode; | |
3428 | struct drbd_genlmsghdr *dh; | |
3429 | struct device_info device_info; | |
3430 | struct device_statistics device_statistics; | |
3431 | struct idr *idr_to_search; | |
3432 | ||
3433 | resource = (struct drbd_resource *)cb->args[0]; | |
3434 | if (!cb->args[0] && !cb->args[1]) { | |
3435 | resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name); | |
3436 | if (resource_filter) { | |
3437 | retcode = ERR_RES_NOT_KNOWN; | |
3438 | resource = drbd_find_resource(nla_data(resource_filter)); | |
3439 | if (!resource) | |
3440 | goto put_result; | |
3441 | cb->args[0] = (long)resource; | |
3442 | } | |
3443 | } | |
3444 | ||
3445 | rcu_read_lock(); | |
3446 | minor = cb->args[1]; | |
3447 | idr_to_search = resource ? &resource->devices : &drbd_devices; | |
3448 | device = idr_get_next(idr_to_search, &minor); | |
3449 | if (!device) { | |
3450 | err = 0; | |
3451 | goto out; | |
3452 | } | |
3453 | idr_for_each_entry_continue(idr_to_search, device, minor) { | |
3454 | retcode = NO_ERROR; | |
3455 | goto put_result; /* only one iteration */ | |
3456 | } | |
3457 | err = 0; | |
3458 | goto out; /* no more devices */ | |
3459 | ||
3460 | put_result: | |
3461 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3462 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3463 | NLM_F_MULTI, DRBD_ADM_GET_DEVICES); | |
3464 | err = -ENOMEM; | |
3465 | if (!dh) | |
3466 | goto out; | |
3467 | dh->ret_code = retcode; | |
3468 | dh->minor = -1U; | |
3469 | if (retcode == NO_ERROR) { | |
3470 | dh->minor = device->minor; | |
3471 | err = nla_put_drbd_cfg_context(skb, device->resource, NULL, device); | |
3472 | if (err) | |
3473 | goto out; | |
3474 | if (get_ldev(device)) { | |
3475 | struct disk_conf *disk_conf = | |
3476 | rcu_dereference(device->ldev->disk_conf); | |
3477 | ||
3478 | err = disk_conf_to_skb(skb, disk_conf, !capable(CAP_SYS_ADMIN)); | |
3479 | put_ldev(device); | |
3480 | if (err) | |
3481 | goto out; | |
3482 | } | |
3483 | device_to_info(&device_info, device); | |
3484 | err = device_info_to_skb(skb, &device_info, !capable(CAP_SYS_ADMIN)); | |
3485 | if (err) | |
3486 | goto out; | |
3487 | ||
3488 | device_to_statistics(&device_statistics, device); | |
3489 | err = device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN)); | |
3490 | if (err) | |
3491 | goto out; | |
3492 | cb->args[1] = minor + 1; | |
3493 | } | |
3494 | genlmsg_end(skb, dh); | |
3495 | err = 0; | |
3496 | ||
3497 | out: | |
3498 | rcu_read_unlock(); | |
3499 | if (err) | |
3500 | return err; | |
3501 | return skb->len; | |
3502 | } | |
3503 | ||
3504 | int drbd_adm_dump_connections_done(struct netlink_callback *cb) | |
3505 | { | |
3506 | return put_resource_in_arg0(cb, 6); | |
3507 | } | |
3508 | ||
3509 | enum { SINGLE_RESOURCE, ITERATE_RESOURCES }; | |
3510 | ||
3511 | int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb) | |
3512 | { | |
3513 | struct nlattr *resource_filter; | |
3514 | struct drbd_resource *resource = NULL, *next_resource; | |
3515 | struct drbd_connection *uninitialized_var(connection); | |
3516 | int err = 0, retcode; | |
3517 | struct drbd_genlmsghdr *dh; | |
3518 | struct connection_info connection_info; | |
3519 | struct connection_statistics connection_statistics; | |
3520 | ||
3521 | rcu_read_lock(); | |
3522 | resource = (struct drbd_resource *)cb->args[0]; | |
3523 | if (!cb->args[0]) { | |
3524 | resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name); | |
3525 | if (resource_filter) { | |
3526 | retcode = ERR_RES_NOT_KNOWN; | |
3527 | resource = drbd_find_resource(nla_data(resource_filter)); | |
3528 | if (!resource) | |
3529 | goto put_result; | |
3530 | cb->args[0] = (long)resource; | |
3531 | cb->args[1] = SINGLE_RESOURCE; | |
3532 | } | |
3533 | } | |
3534 | if (!resource) { | |
3535 | if (list_empty(&drbd_resources)) | |
3536 | goto out; | |
3537 | resource = list_first_entry(&drbd_resources, struct drbd_resource, resources); | |
3538 | kref_get(&resource->kref); | |
3539 | cb->args[0] = (long)resource; | |
3540 | cb->args[1] = ITERATE_RESOURCES; | |
3541 | } | |
3542 | ||
3543 | next_resource: | |
3544 | rcu_read_unlock(); | |
3545 | mutex_lock(&resource->conf_update); | |
3546 | rcu_read_lock(); | |
3547 | if (cb->args[2]) { | |
3548 | for_each_connection_rcu(connection, resource) | |
3549 | if (connection == (struct drbd_connection *)cb->args[2]) | |
3550 | goto found_connection; | |
3551 | /* connection was probably deleted */ | |
3552 | goto no_more_connections; | |
3553 | } | |
3554 | connection = list_entry(&resource->connections, struct drbd_connection, connections); | |
3555 | ||
3556 | found_connection: | |
3557 | list_for_each_entry_continue_rcu(connection, &resource->connections, connections) { | |
3558 | if (!has_net_conf(connection)) | |
3559 | continue; | |
3560 | retcode = NO_ERROR; | |
3561 | goto put_result; /* only one iteration */ | |
3562 | } | |
3563 | ||
3564 | no_more_connections: | |
3565 | if (cb->args[1] == ITERATE_RESOURCES) { | |
3566 | for_each_resource_rcu(next_resource, &drbd_resources) { | |
3567 | if (next_resource == resource) | |
3568 | goto found_resource; | |
3569 | } | |
3570 | /* resource was probably deleted */ | |
3571 | } | |
3572 | goto out; | |
3573 | ||
3574 | found_resource: | |
3575 | list_for_each_entry_continue_rcu(next_resource, &drbd_resources, resources) { | |
3576 | mutex_unlock(&resource->conf_update); | |
3577 | kref_put(&resource->kref, drbd_destroy_resource); | |
3578 | resource = next_resource; | |
3579 | kref_get(&resource->kref); | |
3580 | cb->args[0] = (long)resource; | |
3581 | cb->args[2] = 0; | |
3582 | goto next_resource; | |
3583 | } | |
3584 | goto out; /* no more resources */ | |
3585 | ||
3586 | put_result: | |
3587 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3588 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3589 | NLM_F_MULTI, DRBD_ADM_GET_CONNECTIONS); | |
3590 | err = -ENOMEM; | |
3591 | if (!dh) | |
3592 | goto out; | |
3593 | dh->ret_code = retcode; | |
3594 | dh->minor = -1U; | |
3595 | if (retcode == NO_ERROR) { | |
3596 | struct net_conf *net_conf; | |
3597 | ||
3598 | err = nla_put_drbd_cfg_context(skb, resource, connection, NULL); | |
3599 | if (err) | |
3600 | goto out; | |
3601 | net_conf = rcu_dereference(connection->net_conf); | |
3602 | if (net_conf) { | |
3603 | err = net_conf_to_skb(skb, net_conf, !capable(CAP_SYS_ADMIN)); | |
3604 | if (err) | |
3605 | goto out; | |
3606 | } | |
3607 | connection_to_info(&connection_info, connection); | |
3608 | err = connection_info_to_skb(skb, &connection_info, !capable(CAP_SYS_ADMIN)); | |
3609 | if (err) | |
3610 | goto out; | |
3611 | connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags); | |
3612 | err = connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN)); | |
3613 | if (err) | |
3614 | goto out; | |
3615 | cb->args[2] = (long)connection; | |
3616 | } | |
3617 | genlmsg_end(skb, dh); | |
3618 | err = 0; | |
3619 | ||
3620 | out: | |
3621 | rcu_read_unlock(); | |
3622 | if (resource) | |
3623 | mutex_unlock(&resource->conf_update); | |
3624 | if (err) | |
3625 | return err; | |
3626 | return skb->len; | |
3627 | } | |
3628 | ||
3629 | enum mdf_peer_flag { | |
3630 | MDF_PEER_CONNECTED = 1 << 0, | |
3631 | MDF_PEER_OUTDATED = 1 << 1, | |
3632 | MDF_PEER_FENCING = 1 << 2, | |
3633 | MDF_PEER_FULL_SYNC = 1 << 3, | |
3634 | }; | |
3635 | ||
3636 | static void peer_device_to_statistics(struct peer_device_statistics *s, | |
3637 | struct drbd_peer_device *peer_device) | |
3638 | { | |
3639 | struct drbd_device *device = peer_device->device; | |
3640 | ||
3641 | memset(s, 0, sizeof(*s)); | |
3642 | s->peer_dev_received = device->recv_cnt; | |
3643 | s->peer_dev_sent = device->send_cnt; | |
3644 | s->peer_dev_pending = atomic_read(&device->ap_pending_cnt) + | |
3645 | atomic_read(&device->rs_pending_cnt); | |
3646 | s->peer_dev_unacked = atomic_read(&device->unacked_cnt); | |
3647 | s->peer_dev_out_of_sync = drbd_bm_total_weight(device) << (BM_BLOCK_SHIFT - 9); | |
3648 | s->peer_dev_resync_failed = device->rs_failed << (BM_BLOCK_SHIFT - 9); | |
3649 | if (get_ldev(device)) { | |
3650 | struct drbd_md *md = &device->ldev->md; | |
3651 | ||
3652 | spin_lock_irq(&md->uuid_lock); | |
3653 | s->peer_dev_bitmap_uuid = md->uuid[UI_BITMAP]; | |
3654 | spin_unlock_irq(&md->uuid_lock); | |
3655 | s->peer_dev_flags = | |
3656 | (drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND) ? | |
3657 | MDF_PEER_CONNECTED : 0) + | |
3658 | (drbd_md_test_flag(device->ldev, MDF_CONSISTENT) && | |
3659 | !drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE) ? | |
3660 | MDF_PEER_OUTDATED : 0) + | |
3661 | /* FIXME: MDF_PEER_FENCING? */ | |
3662 | (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) ? | |
3663 | MDF_PEER_FULL_SYNC : 0); | |
3664 | put_ldev(device); | |
3665 | } | |
3666 | } | |
3667 | ||
3668 | int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb) | |
3669 | { | |
3670 | return put_resource_in_arg0(cb, 9); | |
3671 | } | |
3672 | ||
3673 | int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb) | |
3674 | { | |
3675 | struct nlattr *resource_filter; | |
3676 | struct drbd_resource *resource; | |
3677 | struct drbd_device *uninitialized_var(device); | |
3678 | struct drbd_peer_device *peer_device = NULL; | |
3679 | int minor, err, retcode; | |
3680 | struct drbd_genlmsghdr *dh; | |
3681 | struct idr *idr_to_search; | |
3682 | ||
3683 | resource = (struct drbd_resource *)cb->args[0]; | |
3684 | if (!cb->args[0] && !cb->args[1]) { | |
3685 | resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name); | |
3686 | if (resource_filter) { | |
3687 | retcode = ERR_RES_NOT_KNOWN; | |
3688 | resource = drbd_find_resource(nla_data(resource_filter)); | |
3689 | if (!resource) | |
3690 | goto put_result; | |
3691 | } | |
3692 | cb->args[0] = (long)resource; | |
3693 | } | |
3694 | ||
3695 | rcu_read_lock(); | |
3696 | minor = cb->args[1]; | |
3697 | idr_to_search = resource ? &resource->devices : &drbd_devices; | |
3698 | device = idr_find(idr_to_search, minor); | |
3699 | if (!device) { | |
3700 | next_device: | |
3701 | minor++; | |
3702 | cb->args[2] = 0; | |
3703 | device = idr_get_next(idr_to_search, &minor); | |
3704 | if (!device) { | |
3705 | err = 0; | |
3706 | goto out; | |
3707 | } | |
3708 | } | |
3709 | if (cb->args[2]) { | |
3710 | for_each_peer_device(peer_device, device) | |
3711 | if (peer_device == (struct drbd_peer_device *)cb->args[2]) | |
3712 | goto found_peer_device; | |
3713 | /* peer device was probably deleted */ | |
3714 | goto next_device; | |
3715 | } | |
3716 | /* Make peer_device point to the list head (not the first entry). */ | |
3717 | peer_device = list_entry(&device->peer_devices, struct drbd_peer_device, peer_devices); | |
3718 | ||
3719 | found_peer_device: | |
3720 | list_for_each_entry_continue_rcu(peer_device, &device->peer_devices, peer_devices) { | |
3721 | if (!has_net_conf(peer_device->connection)) | |
3722 | continue; | |
3723 | retcode = NO_ERROR; | |
3724 | goto put_result; /* only one iteration */ | |
3725 | } | |
3726 | goto next_device; | |
3727 | ||
3728 | put_result: | |
3729 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3730 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3731 | NLM_F_MULTI, DRBD_ADM_GET_PEER_DEVICES); | |
3732 | err = -ENOMEM; | |
3733 | if (!dh) | |
3734 | goto out; | |
3735 | dh->ret_code = retcode; | |
3736 | dh->minor = -1U; | |
3737 | if (retcode == NO_ERROR) { | |
3738 | struct peer_device_info peer_device_info; | |
3739 | struct peer_device_statistics peer_device_statistics; | |
3740 | ||
3741 | dh->minor = minor; | |
3742 | err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device); | |
3743 | if (err) | |
3744 | goto out; | |
3745 | peer_device_to_info(&peer_device_info, peer_device); | |
3746 | err = peer_device_info_to_skb(skb, &peer_device_info, !capable(CAP_SYS_ADMIN)); | |
3747 | if (err) | |
3748 | goto out; | |
3749 | peer_device_to_statistics(&peer_device_statistics, peer_device); | |
3750 | err = peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN)); | |
3751 | if (err) | |
3752 | goto out; | |
3753 | cb->args[1] = minor; | |
3754 | cb->args[2] = (long)peer_device; | |
3755 | } | |
3756 | genlmsg_end(skb, dh); | |
3757 | err = 0; | |
3758 | ||
3759 | out: | |
3760 | rcu_read_unlock(); | |
3761 | if (err) | |
3762 | return err; | |
3763 | return skb->len; | |
3764 | } | |
251b8f8e AG |
3765 | /* |
3766 | * Return the connection of @resource if @resource has exactly one connection. | |
3767 | */ | |
3768 | static struct drbd_connection *the_only_connection(struct drbd_resource *resource) | |
3769 | { | |
3770 | struct list_head *connections = &resource->connections; | |
3771 | ||
3772 | if (list_empty(connections) || connections->next->next != connections) | |
3773 | return NULL; | |
3774 | return list_first_entry(&resource->connections, struct drbd_connection, connections); | |
3775 | } | |
3776 | ||
8ce953aa | 3777 | static int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device, |
3b98c0c2 | 3778 | const struct sib_info *sib) |
b411b363 | 3779 | { |
251b8f8e | 3780 | struct drbd_resource *resource = device->resource; |
3b98c0c2 LE |
3781 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
3782 | struct nlattr *nla; | |
3783 | int got_ldev; | |
3b98c0c2 LE |
3784 | int err = 0; |
3785 | int exclude_sensitive; | |
3786 | ||
3787 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
3788 | * to. So we better exclude_sensitive information. | |
3789 | * | |
3790 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
3791 | * in the context of the requesting user process. Exclude sensitive | |
3792 | * information, unless current has superuser. | |
3793 | * | |
3794 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
3795 | * relies on the current implementation of netlink_dump(), which | |
3796 | * executes the dump callback successively from netlink_recvmsg(), | |
3797 | * always in the context of the receiving process */ | |
3798 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
3799 | ||
b30ab791 | 3800 | got_ldev = get_ldev(device); |
3b98c0c2 LE |
3801 | |
3802 | /* We need to add connection name and volume number information still. | |
3803 | * Minor number is in drbd_genlmsghdr. */ | |
251b8f8e | 3804 | if (nla_put_drbd_cfg_context(skb, resource, the_only_connection(resource), device)) |
3b98c0c2 | 3805 | goto nla_put_failure; |
3b98c0c2 | 3806 | |
eb6bea67 | 3807 | if (res_opts_to_skb(skb, &device->resource->res_opts, exclude_sensitive)) |
f399002e LE |
3808 | goto nla_put_failure; |
3809 | ||
daeda1cc | 3810 | rcu_read_lock(); |
f9eb7bf4 AG |
3811 | if (got_ldev) { |
3812 | struct disk_conf *disk_conf; | |
44ed167d | 3813 | |
b30ab791 | 3814 | disk_conf = rcu_dereference(device->ldev->disk_conf); |
f9eb7bf4 AG |
3815 | err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive); |
3816 | } | |
3817 | if (!err) { | |
3818 | struct net_conf *nc; | |
3819 | ||
a6b32bc3 | 3820 | nc = rcu_dereference(first_peer_device(device)->connection->net_conf); |
f9eb7bf4 AG |
3821 | if (nc) |
3822 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
3823 | } | |
44ed167d PR |
3824 | rcu_read_unlock(); |
3825 | if (err) | |
3826 | goto nla_put_failure; | |
3b98c0c2 | 3827 | |
ae0be8de | 3828 | nla = nla_nest_start_noflag(skb, DRBD_NLA_STATE_INFO); |
3b98c0c2 LE |
3829 | if (!nla) |
3830 | goto nla_put_failure; | |
26ec9287 | 3831 | if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) || |
b30ab791 | 3832 | nla_put_u32(skb, T_current_state, device->state.i) || |
1dee3f59 ND |
3833 | nla_put_u64_0pad(skb, T_ed_uuid, device->ed_uuid) || |
3834 | nla_put_u64_0pad(skb, T_capacity, | |
3835 | drbd_get_capacity(device->this_bdev)) || | |
3836 | nla_put_u64_0pad(skb, T_send_cnt, device->send_cnt) || | |
3837 | nla_put_u64_0pad(skb, T_recv_cnt, device->recv_cnt) || | |
3838 | nla_put_u64_0pad(skb, T_read_cnt, device->read_cnt) || | |
3839 | nla_put_u64_0pad(skb, T_writ_cnt, device->writ_cnt) || | |
3840 | nla_put_u64_0pad(skb, T_al_writ_cnt, device->al_writ_cnt) || | |
3841 | nla_put_u64_0pad(skb, T_bm_writ_cnt, device->bm_writ_cnt) || | |
b30ab791 AG |
3842 | nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&device->ap_bio_cnt)) || |
3843 | nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&device->ap_pending_cnt)) || | |
3844 | nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&device->rs_pending_cnt))) | |
26ec9287 | 3845 | goto nla_put_failure; |
3b98c0c2 LE |
3846 | |
3847 | if (got_ldev) { | |
39a1aa7f | 3848 | int err; |
b411b363 | 3849 | |
b30ab791 AG |
3850 | spin_lock_irq(&device->ldev->md.uuid_lock); |
3851 | err = nla_put(skb, T_uuids, sizeof(si->uuids), device->ldev->md.uuid); | |
3852 | spin_unlock_irq(&device->ldev->md.uuid_lock); | |
39a1aa7f PR |
3853 | |
3854 | if (err) | |
3855 | goto nla_put_failure; | |
3856 | ||
b30ab791 | 3857 | if (nla_put_u32(skb, T_disk_flags, device->ldev->md.flags) || |
1dee3f59 ND |
3858 | nla_put_u64_0pad(skb, T_bits_total, drbd_bm_bits(device)) || |
3859 | nla_put_u64_0pad(skb, T_bits_oos, | |
3860 | drbd_bm_total_weight(device))) | |
26ec9287 | 3861 | goto nla_put_failure; |
b30ab791 AG |
3862 | if (C_SYNC_SOURCE <= device->state.conn && |
3863 | C_PAUSED_SYNC_T >= device->state.conn) { | |
1dee3f59 ND |
3864 | if (nla_put_u64_0pad(skb, T_bits_rs_total, |
3865 | device->rs_total) || | |
3866 | nla_put_u64_0pad(skb, T_bits_rs_failed, | |
3867 | device->rs_failed)) | |
26ec9287 | 3868 | goto nla_put_failure; |
3b98c0c2 | 3869 | } |
b411b363 | 3870 | } |
b411b363 | 3871 | |
3b98c0c2 LE |
3872 | if (sib) { |
3873 | switch(sib->sib_reason) { | |
3874 | case SIB_SYNC_PROGRESS: | |
3875 | case SIB_GET_STATUS_REPLY: | |
3876 | break; | |
3877 | case SIB_STATE_CHANGE: | |
26ec9287 AG |
3878 | if (nla_put_u32(skb, T_prev_state, sib->os.i) || |
3879 | nla_put_u32(skb, T_new_state, sib->ns.i)) | |
3880 | goto nla_put_failure; | |
3b98c0c2 LE |
3881 | break; |
3882 | case SIB_HELPER_POST: | |
26ec9287 AG |
3883 | if (nla_put_u32(skb, T_helper_exit_code, |
3884 | sib->helper_exit_code)) | |
3885 | goto nla_put_failure; | |
3b98c0c2 LE |
3886 | /* fall through */ |
3887 | case SIB_HELPER_PRE: | |
26ec9287 AG |
3888 | if (nla_put_string(skb, T_helper, sib->helper_name)) |
3889 | goto nla_put_failure; | |
3b98c0c2 LE |
3890 | break; |
3891 | } | |
b411b363 | 3892 | } |
3b98c0c2 | 3893 | nla_nest_end(skb, nla); |
b411b363 | 3894 | |
3b98c0c2 LE |
3895 | if (0) |
3896 | nla_put_failure: | |
3897 | err = -EMSGSIZE; | |
3898 | if (got_ldev) | |
b30ab791 | 3899 | put_ldev(device); |
3b98c0c2 | 3900 | return err; |
b411b363 PR |
3901 | } |
3902 | ||
3b98c0c2 | 3903 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3904 | { |
a910b123 | 3905 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
3906 | enum drbd_ret_code retcode; |
3907 | int err; | |
b411b363 | 3908 | |
a910b123 | 3909 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3910 | if (!adm_ctx.reply_skb) |
3911 | return retcode; | |
3912 | if (retcode != NO_ERROR) | |
3913 | goto out; | |
b411b363 | 3914 | |
b30ab791 | 3915 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.device, NULL); |
3b98c0c2 LE |
3916 | if (err) { |
3917 | nlmsg_free(adm_ctx.reply_skb); | |
3918 | return err; | |
b411b363 | 3919 | } |
3b98c0c2 | 3920 | out: |
a910b123 | 3921 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3922 | return 0; |
b411b363 PR |
3923 | } |
3924 | ||
4b7a530f | 3925 | static int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 3926 | { |
b30ab791 | 3927 | struct drbd_device *device; |
3b98c0c2 | 3928 | struct drbd_genlmsghdr *dh; |
77c556f6 AG |
3929 | struct drbd_resource *pos = (struct drbd_resource *)cb->args[0]; |
3930 | struct drbd_resource *resource = NULL; | |
77c556f6 | 3931 | struct drbd_resource *tmp; |
543cc10b LE |
3932 | unsigned volume = cb->args[1]; |
3933 | ||
3934 | /* Open coded, deferred, iteration: | |
77c556f6 | 3935 | * for_each_resource_safe(resource, tmp, &drbd_resources) { |
251b8f8e AG |
3936 | * connection = "first connection of resource or undefined"; |
3937 | * idr_for_each_entry(&resource->devices, device, i) { | |
543cc10b LE |
3938 | * ... |
3939 | * } | |
3940 | * } | |
77c556f6 | 3941 | * where resource is cb->args[0]; |
543cc10b LE |
3942 | * and i is cb->args[1]; |
3943 | * | |
71932efc LE |
3944 | * cb->args[2] indicates if we shall loop over all resources, |
3945 | * or just dump all volumes of a single resource. | |
3946 | * | |
3b98c0c2 LE |
3947 | * This may miss entries inserted after this dump started, |
3948 | * or entries deleted before they are reached. | |
543cc10b | 3949 | * |
b30ab791 | 3950 | * We need to make sure the device won't disappear while |
543cc10b LE |
3951 | * we are looking at it, and revalidate our iterators |
3952 | * on each iteration. | |
3953 | */ | |
b411b363 | 3954 | |
05a10ec7 | 3955 | /* synchronize with conn_create()/drbd_destroy_connection() */ |
c141ebda | 3956 | rcu_read_lock(); |
543cc10b | 3957 | /* revalidate iterator position */ |
77c556f6 | 3958 | for_each_resource_rcu(tmp, &drbd_resources) { |
543cc10b LE |
3959 | if (pos == NULL) { |
3960 | /* first iteration */ | |
3961 | pos = tmp; | |
77c556f6 | 3962 | resource = pos; |
543cc10b LE |
3963 | break; |
3964 | } | |
3965 | if (tmp == pos) { | |
77c556f6 | 3966 | resource = pos; |
543cc10b LE |
3967 | break; |
3968 | } | |
b411b363 | 3969 | } |
77c556f6 AG |
3970 | if (resource) { |
3971 | next_resource: | |
251b8f8e AG |
3972 | device = idr_get_next(&resource->devices, &volume); |
3973 | if (!device) { | |
77c556f6 AG |
3974 | /* No more volumes to dump on this resource. |
3975 | * Advance resource iterator. */ | |
3976 | pos = list_entry_rcu(resource->resources.next, | |
3977 | struct drbd_resource, resources); | |
3978 | /* Did we dump any volume of this resource yet? */ | |
543cc10b | 3979 | if (volume != 0) { |
71932efc LE |
3980 | /* If we reached the end of the list, |
3981 | * or only a single resource dump was requested, | |
3982 | * we are done. */ | |
77c556f6 | 3983 | if (&pos->resources == &drbd_resources || cb->args[2]) |
71932efc | 3984 | goto out; |
543cc10b | 3985 | volume = 0; |
77c556f6 AG |
3986 | resource = pos; |
3987 | goto next_resource; | |
543cc10b LE |
3988 | } |
3989 | } | |
3990 | ||
98683650 | 3991 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, |
3b98c0c2 LE |
3992 | cb->nlh->nlmsg_seq, &drbd_genl_family, |
3993 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
3994 | if (!dh) | |
543cc10b LE |
3995 | goto out; |
3996 | ||
251b8f8e | 3997 | if (!device) { |
bde89a9e | 3998 | /* This is a connection without a single volume. |
367d675d LE |
3999 | * Suprisingly enough, it may have a network |
4000 | * configuration. */ | |
251b8f8e AG |
4001 | struct drbd_connection *connection; |
4002 | ||
543cc10b LE |
4003 | dh->minor = -1U; |
4004 | dh->ret_code = NO_ERROR; | |
251b8f8e AG |
4005 | connection = the_only_connection(resource); |
4006 | if (nla_put_drbd_cfg_context(skb, resource, connection, NULL)) | |
367d675d | 4007 | goto cancel; |
251b8f8e AG |
4008 | if (connection) { |
4009 | struct net_conf *nc; | |
4010 | ||
4011 | nc = rcu_dereference(connection->net_conf); | |
4012 | if (nc && net_conf_to_skb(skb, nc, 1) != 0) | |
4013 | goto cancel; | |
4014 | } | |
367d675d | 4015 | goto done; |
543cc10b | 4016 | } |
b411b363 | 4017 | |
0b0ba1ef | 4018 | D_ASSERT(device, device->vnr == volume); |
251b8f8e | 4019 | D_ASSERT(device, device->resource == resource); |
3b98c0c2 | 4020 | |
b30ab791 | 4021 | dh->minor = device_to_minor(device); |
3b98c0c2 LE |
4022 | dh->ret_code = NO_ERROR; |
4023 | ||
b30ab791 | 4024 | if (nla_put_status_info(skb, device, NULL)) { |
367d675d | 4025 | cancel: |
3b98c0c2 | 4026 | genlmsg_cancel(skb, dh); |
543cc10b | 4027 | goto out; |
3b98c0c2 | 4028 | } |
367d675d | 4029 | done: |
3b98c0c2 | 4030 | genlmsg_end(skb, dh); |
bde89a9e | 4031 | } |
b411b363 | 4032 | |
543cc10b | 4033 | out: |
c141ebda | 4034 | rcu_read_unlock(); |
543cc10b | 4035 | /* where to start the next iteration */ |
bde89a9e | 4036 | cb->args[0] = (long)pos; |
77c556f6 | 4037 | cb->args[1] = (pos == resource) ? volume + 1 : 0; |
b411b363 | 4038 | |
77c556f6 | 4039 | /* No more resources/volumes/minors found results in an empty skb. |
543cc10b | 4040 | * Which will terminate the dump. */ |
3b98c0c2 | 4041 | return skb->len; |
b411b363 PR |
4042 | } |
4043 | ||
71932efc LE |
4044 | /* |
4045 | * Request status of all resources, or of all volumes within a single resource. | |
4046 | * | |
4047 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
4048 | * Which means we cannot use the family->attrbuf or other such members, because | |
4049 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
4050 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
4051 | * | |
4052 | * Once things are setup properly, we call into get_one_status(). | |
b411b363 | 4053 | */ |
71932efc | 4054 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 4055 | { |
71932efc LE |
4056 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; |
4057 | struct nlattr *nla; | |
7c3063cc | 4058 | const char *resource_name; |
4bc76048 | 4059 | struct drbd_resource *resource; |
7c3063cc | 4060 | int maxtype; |
71932efc LE |
4061 | |
4062 | /* Is this a followup call? */ | |
4063 | if (cb->args[0]) { | |
4064 | /* ... of a single resource dump, | |
4065 | * and the resource iterator has been advanced already? */ | |
4066 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
4067 | return 0; /* DONE. */ | |
4068 | goto dump; | |
4069 | } | |
4070 | ||
4071 | /* First call (from netlink_dump_start). We need to figure out | |
4072 | * which resource(s) the user wants us to dump. */ | |
4073 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
4074 | nlmsg_attrlen(cb->nlh, hdrlen), | |
4075 | DRBD_NLA_CFG_CONTEXT); | |
4076 | ||
4077 | /* No explicit context given. Dump all. */ | |
4078 | if (!nla) | |
4079 | goto dump; | |
7c3063cc AG |
4080 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
4081 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
4082 | if (IS_ERR(nla)) | |
4083 | return PTR_ERR(nla); | |
71932efc LE |
4084 | /* context given, but no name present? */ |
4085 | if (!nla) | |
4086 | return -EINVAL; | |
7c3063cc | 4087 | resource_name = nla_data(nla); |
4bc76048 AG |
4088 | if (!*resource_name) |
4089 | return -ENODEV; | |
4090 | resource = drbd_find_resource(resource_name); | |
4091 | if (!resource) | |
71932efc LE |
4092 | return -ENODEV; |
4093 | ||
4bc76048 | 4094 | kref_put(&resource->kref, drbd_destroy_resource); /* get_one_status() revalidates the resource */ |
0ace9dfa | 4095 | |
71932efc | 4096 | /* prime iterators, and set "filter" mode mark: |
bde89a9e | 4097 | * only dump this connection. */ |
4bc76048 | 4098 | cb->args[0] = (long)resource; |
71932efc | 4099 | /* cb->args[1] = 0; passed in this way. */ |
4bc76048 | 4100 | cb->args[2] = (long)resource; |
71932efc LE |
4101 | |
4102 | dump: | |
4103 | return get_one_status(skb, cb); | |
4104 | } | |
b411b363 | 4105 | |
3b98c0c2 | 4106 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4107 | { |
a910b123 | 4108 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
4109 | enum drbd_ret_code retcode; |
4110 | struct timeout_parms tp; | |
4111 | int err; | |
b411b363 | 4112 | |
a910b123 | 4113 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4114 | if (!adm_ctx.reply_skb) |
4115 | return retcode; | |
4116 | if (retcode != NO_ERROR) | |
4117 | goto out; | |
b411b363 | 4118 | |
3b98c0c2 | 4119 | tp.timeout_type = |
b30ab791 AG |
4120 | adm_ctx.device->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : |
4121 | test_bit(USE_DEGR_WFC_T, &adm_ctx.device->flags) ? UT_DEGRADED : | |
3b98c0c2 | 4122 | UT_DEFAULT; |
b411b363 | 4123 | |
3b98c0c2 LE |
4124 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
4125 | if (err) { | |
4126 | nlmsg_free(adm_ctx.reply_skb); | |
4127 | return err; | |
4128 | } | |
4129 | out: | |
a910b123 | 4130 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4131 | return 0; |
b411b363 PR |
4132 | } |
4133 | ||
3b98c0c2 | 4134 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4135 | { |
a910b123 | 4136 | struct drbd_config_context adm_ctx; |
b30ab791 | 4137 | struct drbd_device *device; |
3b98c0c2 | 4138 | enum drbd_ret_code retcode; |
58ffa580 | 4139 | struct start_ov_parms parms; |
b411b363 | 4140 | |
a910b123 | 4141 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4142 | if (!adm_ctx.reply_skb) |
4143 | return retcode; | |
4144 | if (retcode != NO_ERROR) | |
4145 | goto out; | |
873b0d5f | 4146 | |
b30ab791 | 4147 | device = adm_ctx.device; |
58ffa580 LE |
4148 | |
4149 | /* resume from last known position, if possible */ | |
b30ab791 | 4150 | parms.ov_start_sector = device->ov_start_sector; |
58ffa580 | 4151 | parms.ov_stop_sector = ULLONG_MAX; |
3b98c0c2 | 4152 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { |
f399002e | 4153 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
4154 | if (err) { |
4155 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 4156 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
4157 | goto out; |
4158 | } | |
b411b363 | 4159 | } |
9e276872 LE |
4160 | mutex_lock(&adm_ctx.resource->adm_mutex); |
4161 | ||
58ffa580 | 4162 | /* w_make_ov_request expects position to be aligned */ |
b30ab791 AG |
4163 | device->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1); |
4164 | device->ov_stop_sector = parms.ov_stop_sector; | |
873b0d5f LE |
4165 | |
4166 | /* If there is still bitmap IO pending, e.g. previous resync or verify | |
4167 | * just being finished, wait for it before requesting a new resync. */ | |
b30ab791 AG |
4168 | drbd_suspend_io(device); |
4169 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
4170 | retcode = drbd_request_state(device, NS(conn, C_VERIFY_S)); | |
4171 | drbd_resume_io(device); | |
9e276872 LE |
4172 | |
4173 | mutex_unlock(&adm_ctx.resource->adm_mutex); | |
3b98c0c2 | 4174 | out: |
a910b123 | 4175 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
4176 | return 0; |
4177 | } | |
4178 | ||
4179 | ||
3b98c0c2 | 4180 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4181 | { |
a910b123 | 4182 | struct drbd_config_context adm_ctx; |
b30ab791 | 4183 | struct drbd_device *device; |
3b98c0c2 | 4184 | enum drbd_ret_code retcode; |
b411b363 PR |
4185 | int skip_initial_sync = 0; |
4186 | int err; | |
3b98c0c2 | 4187 | struct new_c_uuid_parms args; |
b411b363 | 4188 | |
a910b123 | 4189 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4190 | if (!adm_ctx.reply_skb) |
4191 | return retcode; | |
4192 | if (retcode != NO_ERROR) | |
4193 | goto out_nolock; | |
b411b363 | 4194 | |
b30ab791 | 4195 | device = adm_ctx.device; |
3b98c0c2 LE |
4196 | memset(&args, 0, sizeof(args)); |
4197 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 4198 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
4199 | if (err) { |
4200 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 4201 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
4202 | goto out_nolock; |
4203 | } | |
b411b363 PR |
4204 | } |
4205 | ||
9e276872 | 4206 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 4207 | mutex_lock(device->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 | 4208 | |
b30ab791 | 4209 | if (!get_ldev(device)) { |
b411b363 PR |
4210 | retcode = ERR_NO_DISK; |
4211 | goto out; | |
4212 | } | |
4213 | ||
4214 | /* this is "skip initial sync", assume to be clean */ | |
a6b32bc3 AG |
4215 | if (device->state.conn == C_CONNECTED && |
4216 | first_peer_device(device)->connection->agreed_pro_version >= 90 && | |
b30ab791 | 4217 | device->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
d0180171 | 4218 | drbd_info(device, "Preparing to skip initial sync\n"); |
b411b363 | 4219 | skip_initial_sync = 1; |
b30ab791 | 4220 | } else if (device->state.conn != C_STANDALONE) { |
b411b363 PR |
4221 | retcode = ERR_CONNECTED; |
4222 | goto out_dec; | |
4223 | } | |
4224 | ||
b30ab791 AG |
4225 | drbd_uuid_set(device, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ |
4226 | drbd_uuid_new_current(device); /* New current, previous to UI_BITMAP */ | |
b411b363 PR |
4227 | |
4228 | if (args.clear_bm) { | |
b30ab791 | 4229 | err = drbd_bitmap_io(device, &drbd_bmio_clear_n_write, |
20ceb2b2 | 4230 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); |
b411b363 | 4231 | if (err) { |
d0180171 | 4232 | drbd_err(device, "Writing bitmap failed with %d\n", err); |
b411b363 PR |
4233 | retcode = ERR_IO_MD_DISK; |
4234 | } | |
4235 | if (skip_initial_sync) { | |
69a22773 | 4236 | drbd_send_uuids_skip_initial_sync(first_peer_device(device)); |
b30ab791 AG |
4237 | _drbd_uuid_set(device, UI_BITMAP, 0); |
4238 | drbd_print_uuids(device, "cleared bitmap UUID"); | |
0500813f | 4239 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 | 4240 | _drbd_set_state(_NS2(device, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
b411b363 | 4241 | CS_VERBOSE, NULL); |
0500813f | 4242 | spin_unlock_irq(&device->resource->req_lock); |
b411b363 PR |
4243 | } |
4244 | } | |
4245 | ||
b30ab791 | 4246 | drbd_md_sync(device); |
b411b363 | 4247 | out_dec: |
b30ab791 | 4248 | put_ldev(device); |
b411b363 | 4249 | out: |
b30ab791 | 4250 | mutex_unlock(device->state_mutex); |
9e276872 | 4251 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 4252 | out_nolock: |
a910b123 | 4253 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
4254 | return 0; |
4255 | } | |
4256 | ||
3b98c0c2 | 4257 | static enum drbd_ret_code |
a910b123 | 4258 | drbd_check_resource_name(struct drbd_config_context *adm_ctx) |
b411b363 | 4259 | { |
a910b123 | 4260 | const char *name = adm_ctx->resource_name; |
3b98c0c2 | 4261 | if (!name || !name[0]) { |
a910b123 | 4262 | drbd_msg_put_info(adm_ctx->reply_skb, "resource name missing"); |
3b98c0c2 | 4263 | return ERR_MANDATORY_TAG; |
b411b363 | 4264 | } |
3b98c0c2 LE |
4265 | /* if we want to use these in sysfs/configfs/debugfs some day, |
4266 | * we must not allow slashes */ | |
4267 | if (strchr(name, '/')) { | |
a910b123 | 4268 | drbd_msg_put_info(adm_ctx->reply_skb, "invalid resource name"); |
3b98c0c2 | 4269 | return ERR_INVALID_REQUEST; |
b411b363 | 4270 | } |
3b98c0c2 | 4271 | return NO_ERROR; |
774b3055 | 4272 | } |
b411b363 | 4273 | |
a2972846 AG |
4274 | static void resource_to_info(struct resource_info *info, |
4275 | struct drbd_resource *resource) | |
4276 | { | |
4277 | info->res_role = conn_highest_role(first_connection(resource)); | |
4278 | info->res_susp = resource->susp; | |
4279 | info->res_susp_nod = resource->susp_nod; | |
4280 | info->res_susp_fen = resource->susp_fen; | |
4281 | } | |
4282 | ||
789c1b62 | 4283 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4284 | { |
a2972846 | 4285 | struct drbd_connection *connection; |
a910b123 | 4286 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 4287 | enum drbd_ret_code retcode; |
afbbfa88 AG |
4288 | struct res_opts res_opts; |
4289 | int err; | |
b411b363 | 4290 | |
a910b123 | 4291 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, 0); |
3b98c0c2 LE |
4292 | if (!adm_ctx.reply_skb) |
4293 | return retcode; | |
4294 | if (retcode != NO_ERROR) | |
4295 | goto out; | |
b411b363 | 4296 | |
afbbfa88 AG |
4297 | set_res_opts_defaults(&res_opts); |
4298 | err = res_opts_from_attrs(&res_opts, info); | |
4299 | if (err && err != -ENOMSG) { | |
4300 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 4301 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
afbbfa88 | 4302 | goto out; |
b411b363 PR |
4303 | } |
4304 | ||
a910b123 | 4305 | retcode = drbd_check_resource_name(&adm_ctx); |
3b98c0c2 LE |
4306 | if (retcode != NO_ERROR) |
4307 | goto out; | |
b411b363 | 4308 | |
5c661042 | 4309 | if (adm_ctx.resource) { |
38f19616 LE |
4310 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
4311 | retcode = ERR_INVALID_REQUEST; | |
a910b123 | 4312 | drbd_msg_put_info(adm_ctx.reply_skb, "resource exists"); |
38f19616 LE |
4313 | } |
4314 | /* else: still NO_ERROR */ | |
3b98c0c2 | 4315 | goto out; |
b411b363 | 4316 | } |
b411b363 | 4317 | |
9e276872 | 4318 | /* not yet safe for genl_family.parallel_ops */ |
28bc3b8c | 4319 | mutex_lock(&resources_mutex); |
a2972846 | 4320 | connection = conn_create(adm_ctx.resource_name, &res_opts); |
28bc3b8c | 4321 | mutex_unlock(&resources_mutex); |
a2972846 AG |
4322 | |
4323 | if (connection) { | |
4324 | struct resource_info resource_info; | |
4325 | ||
4326 | mutex_lock(¬ification_mutex); | |
4327 | resource_to_info(&resource_info, connection->resource); | |
4328 | notify_resource_state(NULL, 0, connection->resource, | |
4329 | &resource_info, NOTIFY_CREATE); | |
4330 | mutex_unlock(¬ification_mutex); | |
4331 | } else | |
4332 | retcode = ERR_NOMEM; | |
4333 | ||
3b98c0c2 | 4334 | out: |
a910b123 | 4335 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4336 | return 0; |
b411b363 PR |
4337 | } |
4338 | ||
a2972846 AG |
4339 | static void device_to_info(struct device_info *info, |
4340 | struct drbd_device *device) | |
4341 | { | |
4342 | info->dev_disk_state = device->state.disk; | |
4343 | } | |
4344 | ||
4345 | ||
05a10ec7 | 4346 | int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4347 | { |
a910b123 | 4348 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
4349 | struct drbd_genlmsghdr *dh = info->userhdr; |
4350 | enum drbd_ret_code retcode; | |
b411b363 | 4351 | |
a910b123 | 4352 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
4353 | if (!adm_ctx.reply_skb) |
4354 | return retcode; | |
4355 | if (retcode != NO_ERROR) | |
4356 | goto out; | |
b411b363 | 4357 | |
f2257a56 | 4358 | if (dh->minor > MINORMASK) { |
a910b123 | 4359 | drbd_msg_put_info(adm_ctx.reply_skb, "requested minor out of range"); |
3b98c0c2 LE |
4360 | retcode = ERR_INVALID_REQUEST; |
4361 | goto out; | |
b411b363 | 4362 | } |
0c8e36d9 | 4363 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
a910b123 | 4364 | drbd_msg_put_info(adm_ctx.reply_skb, "requested volume id out of range"); |
3b98c0c2 LE |
4365 | retcode = ERR_INVALID_REQUEST; |
4366 | goto out; | |
b411b363 | 4367 | } |
b411b363 | 4368 | |
38f19616 | 4369 | /* drbd_adm_prepare made sure already |
a6b32bc3 | 4370 | * that first_peer_device(device)->connection and device->vnr match the request. */ |
b30ab791 | 4371 | if (adm_ctx.device) { |
38f19616 | 4372 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) |
179e20b8 | 4373 | retcode = ERR_MINOR_OR_VOLUME_EXISTS; |
38f19616 LE |
4374 | /* else: still NO_ERROR */ |
4375 | goto out; | |
b411b363 | 4376 | } |
38f19616 | 4377 | |
9e276872 | 4378 | mutex_lock(&adm_ctx.resource->adm_mutex); |
a910b123 | 4379 | retcode = drbd_create_device(&adm_ctx, dh->minor); |
a2972846 AG |
4380 | if (retcode == NO_ERROR) { |
4381 | struct drbd_device *device; | |
4382 | struct drbd_peer_device *peer_device; | |
4383 | struct device_info info; | |
4384 | unsigned int peer_devices = 0; | |
4385 | enum drbd_notification_type flags; | |
4386 | ||
4387 | device = minor_to_device(dh->minor); | |
4388 | for_each_peer_device(peer_device, device) { | |
4389 | if (!has_net_conf(peer_device->connection)) | |
4390 | continue; | |
4391 | peer_devices++; | |
4392 | } | |
4393 | ||
4394 | device_to_info(&info, device); | |
4395 | mutex_lock(¬ification_mutex); | |
4396 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
4397 | notify_device_state(NULL, 0, device, &info, NOTIFY_CREATE | flags); | |
4398 | for_each_peer_device(peer_device, device) { | |
4399 | struct peer_device_info peer_device_info; | |
4400 | ||
4401 | if (!has_net_conf(peer_device->connection)) | |
4402 | continue; | |
4403 | peer_device_to_info(&peer_device_info, peer_device); | |
4404 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
4405 | notify_peer_device_state(NULL, 0, peer_device, &peer_device_info, | |
4406 | NOTIFY_CREATE | flags); | |
4407 | } | |
4408 | mutex_unlock(¬ification_mutex); | |
4409 | } | |
9e276872 | 4410 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 4411 | out: |
a910b123 | 4412 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4413 | return 0; |
b411b363 PR |
4414 | } |
4415 | ||
05a10ec7 | 4416 | static enum drbd_ret_code adm_del_minor(struct drbd_device *device) |
b411b363 | 4417 | { |
a2972846 AG |
4418 | struct drbd_peer_device *peer_device; |
4419 | ||
b30ab791 AG |
4420 | if (device->state.disk == D_DISKLESS && |
4421 | /* no need to be device->state.conn == C_STANDALONE && | |
85f75dd7 LE |
4422 | * we may want to delete a minor from a live replication group. |
4423 | */ | |
b30ab791 | 4424 | device->state.role == R_SECONDARY) { |
a2972846 AG |
4425 | struct drbd_connection *connection = |
4426 | first_connection(device->resource); | |
4427 | ||
b30ab791 | 4428 | _drbd_request_state(device, NS(conn, C_WF_REPORT_PARAMS), |
369bea63 | 4429 | CS_VERBOSE + CS_WAIT_COMPLETE); |
a2972846 AG |
4430 | |
4431 | /* If the state engine hasn't stopped the sender thread yet, we | |
4432 | * need to flush the sender work queue before generating the | |
4433 | * DESTROY events here. */ | |
4434 | if (get_t_state(&connection->worker) == RUNNING) | |
4435 | drbd_flush_workqueue(&connection->sender_work); | |
4436 | ||
4437 | mutex_lock(¬ification_mutex); | |
4438 | for_each_peer_device(peer_device, device) { | |
4439 | if (!has_net_conf(peer_device->connection)) | |
4440 | continue; | |
4441 | notify_peer_device_state(NULL, 0, peer_device, NULL, | |
4442 | NOTIFY_DESTROY | NOTIFY_CONTINUES); | |
4443 | } | |
4444 | notify_device_state(NULL, 0, device, NULL, NOTIFY_DESTROY); | |
4445 | mutex_unlock(¬ification_mutex); | |
4446 | ||
f82795d6 | 4447 | drbd_delete_device(device); |
85f75dd7 LE |
4448 | return NO_ERROR; |
4449 | } else | |
4450 | return ERR_MINOR_CONFIGURED; | |
b411b363 PR |
4451 | } |
4452 | ||
05a10ec7 | 4453 | int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4454 | { |
a910b123 | 4455 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 4456 | enum drbd_ret_code retcode; |
b411b363 | 4457 | |
a910b123 | 4458 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4459 | if (!adm_ctx.reply_skb) |
4460 | return retcode; | |
4461 | if (retcode != NO_ERROR) | |
4462 | goto out; | |
b411b363 | 4463 | |
9e276872 | 4464 | mutex_lock(&adm_ctx.resource->adm_mutex); |
05a10ec7 | 4465 | retcode = adm_del_minor(adm_ctx.device); |
9e276872 | 4466 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
85f75dd7 | 4467 | out: |
a910b123 | 4468 | drbd_adm_finish(&adm_ctx, info, retcode); |
85f75dd7 | 4469 | return 0; |
b411b363 PR |
4470 | } |
4471 | ||
179e20b8 AG |
4472 | static int adm_del_resource(struct drbd_resource *resource) |
4473 | { | |
4474 | struct drbd_connection *connection; | |
4475 | ||
4476 | for_each_connection(connection, resource) { | |
4477 | if (connection->cstate > C_STANDALONE) | |
4478 | return ERR_NET_CONFIGURED; | |
4479 | } | |
4480 | if (!idr_is_empty(&resource->devices)) | |
4481 | return ERR_RES_IN_USE; | |
4482 | ||
a2972846 AG |
4483 | /* The state engine has stopped the sender thread, so we don't |
4484 | * need to flush the sender work queue before generating the | |
4485 | * DESTROY event here. */ | |
4486 | mutex_lock(¬ification_mutex); | |
4487 | notify_resource_state(NULL, 0, resource, NULL, NOTIFY_DESTROY); | |
4488 | mutex_unlock(¬ification_mutex); | |
4489 | ||
28bc3b8c | 4490 | mutex_lock(&resources_mutex); |
179e20b8 | 4491 | list_del_rcu(&resource->resources); |
28bc3b8c | 4492 | mutex_unlock(&resources_mutex); |
179e20b8 AG |
4493 | /* Make sure all threads have actually stopped: state handling only |
4494 | * does drbd_thread_stop_nowait(). */ | |
4495 | list_for_each_entry(connection, &resource->connections, connections) | |
4496 | drbd_thread_stop(&connection->worker); | |
4497 | synchronize_rcu(); | |
4498 | drbd_free_resource(resource); | |
4499 | return NO_ERROR; | |
4500 | } | |
4501 | ||
85f75dd7 | 4502 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4503 | { |
a910b123 | 4504 | struct drbd_config_context adm_ctx; |
b6f85ef9 AG |
4505 | struct drbd_resource *resource; |
4506 | struct drbd_connection *connection; | |
4507 | struct drbd_device *device; | |
f3dfa40a | 4508 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 | 4509 | unsigned i; |
b411b363 | 4510 | |
a910b123 | 4511 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
85f75dd7 LE |
4512 | if (!adm_ctx.reply_skb) |
4513 | return retcode; | |
4514 | if (retcode != NO_ERROR) | |
9e276872 | 4515 | goto finish; |
b411b363 | 4516 | |
b6f85ef9 | 4517 | resource = adm_ctx.resource; |
9e276872 | 4518 | mutex_lock(&resource->adm_mutex); |
85f75dd7 | 4519 | /* demote */ |
b6f85ef9 AG |
4520 | for_each_connection(connection, resource) { |
4521 | struct drbd_peer_device *peer_device; | |
4522 | ||
4523 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { | |
4524 | retcode = drbd_set_role(peer_device->device, R_SECONDARY, 0); | |
4525 | if (retcode < SS_SUCCESS) { | |
a910b123 | 4526 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to demote"); |
b6f85ef9 AG |
4527 | goto out; |
4528 | } | |
4529 | } | |
4530 | ||
4531 | retcode = conn_try_disconnect(connection, 0); | |
85f75dd7 | 4532 | if (retcode < SS_SUCCESS) { |
a910b123 | 4533 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to disconnect"); |
c141ebda | 4534 | goto out; |
85f75dd7 | 4535 | } |
b411b363 | 4536 | } |
b411b363 | 4537 | |
85f75dd7 | 4538 | /* detach */ |
b6f85ef9 AG |
4539 | idr_for_each_entry(&resource->devices, device, i) { |
4540 | retcode = adm_detach(device, 0); | |
27012382 | 4541 | if (retcode < SS_SUCCESS || retcode > NO_ERROR) { |
a910b123 | 4542 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to detach"); |
c141ebda | 4543 | goto out; |
85f75dd7 LE |
4544 | } |
4545 | } | |
b411b363 | 4546 | |
85f75dd7 | 4547 | /* delete volumes */ |
b6f85ef9 AG |
4548 | idr_for_each_entry(&resource->devices, device, i) { |
4549 | retcode = adm_del_minor(device); | |
85f75dd7 LE |
4550 | if (retcode != NO_ERROR) { |
4551 | /* "can not happen" */ | |
a910b123 | 4552 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to delete volume"); |
ef356262 | 4553 | goto out; |
85f75dd7 LE |
4554 | } |
4555 | } | |
b411b363 | 4556 | |
179e20b8 | 4557 | retcode = adm_del_resource(resource); |
3b98c0c2 | 4558 | out: |
9e276872 LE |
4559 | mutex_unlock(&resource->adm_mutex); |
4560 | finish: | |
a910b123 | 4561 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4562 | return 0; |
b411b363 PR |
4563 | } |
4564 | ||
789c1b62 | 4565 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4566 | { |
a910b123 | 4567 | struct drbd_config_context adm_ctx; |
77c556f6 | 4568 | struct drbd_resource *resource; |
3b98c0c2 | 4569 | enum drbd_ret_code retcode; |
b411b363 | 4570 | |
a910b123 | 4571 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
4572 | if (!adm_ctx.reply_skb) |
4573 | return retcode; | |
4574 | if (retcode != NO_ERROR) | |
9e276872 | 4575 | goto finish; |
77c556f6 | 4576 | resource = adm_ctx.resource; |
b411b363 | 4577 | |
179e20b8 AG |
4578 | mutex_lock(&resource->adm_mutex); |
4579 | retcode = adm_del_resource(resource); | |
9e276872 LE |
4580 | mutex_unlock(&resource->adm_mutex); |
4581 | finish: | |
a910b123 | 4582 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
4583 | return 0; |
4584 | } | |
4585 | ||
b30ab791 | 4586 | void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib) |
b411b363 | 4587 | { |
3b98c0c2 LE |
4588 | struct sk_buff *msg; |
4589 | struct drbd_genlmsghdr *d_out; | |
4590 | unsigned seq; | |
4591 | int err = -ENOMEM; | |
4592 | ||
4593 | seq = atomic_inc_return(&drbd_genl_seq); | |
4594 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4595 | if (!msg) | |
4596 | goto failed; | |
4597 | ||
4598 | err = -EMSGSIZE; | |
4599 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
4600 | if (!d_out) /* cannot happen, but anyways. */ | |
4601 | goto nla_put_failure; | |
b30ab791 | 4602 | d_out->minor = device_to_minor(device); |
6f9b5f84 | 4603 | d_out->ret_code = NO_ERROR; |
3b98c0c2 | 4604 | |
b30ab791 | 4605 | if (nla_put_status_info(msg, device, sib)) |
3b98c0c2 LE |
4606 | goto nla_put_failure; |
4607 | genlmsg_end(msg, d_out); | |
d38f8612 | 4608 | err = drbd_genl_multicast_events(msg, GFP_NOWAIT); |
3b98c0c2 LE |
4609 | /* msg has been consumed or freed in netlink_broadcast() */ |
4610 | if (err && err != -ESRCH) | |
4611 | goto failed; | |
b411b363 | 4612 | |
3b98c0c2 | 4613 | return; |
b411b363 | 4614 | |
3b98c0c2 LE |
4615 | nla_put_failure: |
4616 | nlmsg_free(msg); | |
4617 | failed: | |
d0180171 | 4618 | drbd_err(device, "Error %d while broadcasting event. " |
3b98c0c2 LE |
4619 | "Event seq:%u sib_reason:%u\n", |
4620 | err, seq, sib->sib_reason); | |
b411b363 | 4621 | } |
a2972846 | 4622 | |
a2972846 AG |
4623 | static int nla_put_notification_header(struct sk_buff *msg, |
4624 | enum drbd_notification_type type) | |
4625 | { | |
4626 | struct drbd_notification_header nh = { | |
4627 | .nh_type = type, | |
4628 | }; | |
4629 | ||
4630 | return drbd_notification_header_to_skb(msg, &nh, true); | |
4631 | } | |
4632 | ||
4633 | void notify_resource_state(struct sk_buff *skb, | |
4634 | unsigned int seq, | |
4635 | struct drbd_resource *resource, | |
4636 | struct resource_info *resource_info, | |
4637 | enum drbd_notification_type type) | |
4638 | { | |
4639 | struct resource_statistics resource_statistics; | |
4640 | struct drbd_genlmsghdr *dh; | |
4641 | bool multicast = false; | |
4642 | int err; | |
4643 | ||
4644 | if (!skb) { | |
4645 | seq = atomic_inc_return(¬ify_genl_seq); | |
4646 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4647 | err = -ENOMEM; | |
4648 | if (!skb) | |
4649 | goto failed; | |
4650 | multicast = true; | |
4651 | } | |
4652 | ||
4653 | err = -EMSGSIZE; | |
4654 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_RESOURCE_STATE); | |
4655 | if (!dh) | |
4656 | goto nla_put_failure; | |
4657 | dh->minor = -1U; | |
4658 | dh->ret_code = NO_ERROR; | |
4659 | if (nla_put_drbd_cfg_context(skb, resource, NULL, NULL) || | |
4660 | nla_put_notification_header(skb, type) || | |
4661 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4662 | resource_info_to_skb(skb, resource_info, true))) | |
4663 | goto nla_put_failure; | |
4664 | resource_statistics.res_stat_write_ordering = resource->write_ordering; | |
4665 | err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN)); | |
4666 | if (err) | |
4667 | goto nla_put_failure; | |
4668 | genlmsg_end(skb, dh); | |
4669 | if (multicast) { | |
d38f8612 | 4670 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4671 | /* skb has been consumed or freed in netlink_broadcast() */ |
4672 | if (err && err != -ESRCH) | |
4673 | goto failed; | |
4674 | } | |
4675 | return; | |
4676 | ||
4677 | nla_put_failure: | |
4678 | nlmsg_free(skb); | |
4679 | failed: | |
4680 | drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n", | |
4681 | err, seq); | |
4682 | } | |
4683 | ||
4684 | void notify_device_state(struct sk_buff *skb, | |
4685 | unsigned int seq, | |
4686 | struct drbd_device *device, | |
4687 | struct device_info *device_info, | |
4688 | enum drbd_notification_type type) | |
4689 | { | |
4690 | struct device_statistics device_statistics; | |
4691 | struct drbd_genlmsghdr *dh; | |
4692 | bool multicast = false; | |
4693 | int err; | |
4694 | ||
4695 | if (!skb) { | |
4696 | seq = atomic_inc_return(¬ify_genl_seq); | |
4697 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4698 | err = -ENOMEM; | |
4699 | if (!skb) | |
4700 | goto failed; | |
4701 | multicast = true; | |
4702 | } | |
4703 | ||
4704 | err = -EMSGSIZE; | |
4705 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_DEVICE_STATE); | |
4706 | if (!dh) | |
4707 | goto nla_put_failure; | |
4708 | dh->minor = device->minor; | |
4709 | dh->ret_code = NO_ERROR; | |
4710 | if (nla_put_drbd_cfg_context(skb, device->resource, NULL, device) || | |
4711 | nla_put_notification_header(skb, type) || | |
4712 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4713 | device_info_to_skb(skb, device_info, true))) | |
4714 | goto nla_put_failure; | |
4715 | device_to_statistics(&device_statistics, device); | |
4716 | device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN)); | |
4717 | genlmsg_end(skb, dh); | |
4718 | if (multicast) { | |
d38f8612 | 4719 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4720 | /* skb has been consumed or freed in netlink_broadcast() */ |
4721 | if (err && err != -ESRCH) | |
4722 | goto failed; | |
4723 | } | |
4724 | return; | |
4725 | ||
4726 | nla_put_failure: | |
4727 | nlmsg_free(skb); | |
4728 | failed: | |
4729 | drbd_err(device, "Error %d while broadcasting event. Event seq:%u\n", | |
4730 | err, seq); | |
4731 | } | |
4732 | ||
4733 | void notify_connection_state(struct sk_buff *skb, | |
4734 | unsigned int seq, | |
4735 | struct drbd_connection *connection, | |
4736 | struct connection_info *connection_info, | |
4737 | enum drbd_notification_type type) | |
4738 | { | |
4739 | struct connection_statistics connection_statistics; | |
4740 | struct drbd_genlmsghdr *dh; | |
4741 | bool multicast = false; | |
4742 | int err; | |
4743 | ||
4744 | if (!skb) { | |
4745 | seq = atomic_inc_return(¬ify_genl_seq); | |
4746 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4747 | err = -ENOMEM; | |
4748 | if (!skb) | |
4749 | goto failed; | |
4750 | multicast = true; | |
4751 | } | |
4752 | ||
4753 | err = -EMSGSIZE; | |
4754 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_CONNECTION_STATE); | |
4755 | if (!dh) | |
4756 | goto nla_put_failure; | |
4757 | dh->minor = -1U; | |
4758 | dh->ret_code = NO_ERROR; | |
4759 | if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) || | |
4760 | nla_put_notification_header(skb, type) || | |
4761 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4762 | connection_info_to_skb(skb, connection_info, true))) | |
4763 | goto nla_put_failure; | |
4764 | connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags); | |
4765 | connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN)); | |
4766 | genlmsg_end(skb, dh); | |
4767 | if (multicast) { | |
d38f8612 | 4768 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4769 | /* skb has been consumed or freed in netlink_broadcast() */ |
4770 | if (err && err != -ESRCH) | |
4771 | goto failed; | |
4772 | } | |
4773 | return; | |
4774 | ||
4775 | nla_put_failure: | |
4776 | nlmsg_free(skb); | |
4777 | failed: | |
4778 | drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n", | |
4779 | err, seq); | |
4780 | } | |
4781 | ||
4782 | void notify_peer_device_state(struct sk_buff *skb, | |
4783 | unsigned int seq, | |
4784 | struct drbd_peer_device *peer_device, | |
4785 | struct peer_device_info *peer_device_info, | |
4786 | enum drbd_notification_type type) | |
4787 | { | |
4788 | struct peer_device_statistics peer_device_statistics; | |
4789 | struct drbd_resource *resource = peer_device->device->resource; | |
4790 | struct drbd_genlmsghdr *dh; | |
4791 | bool multicast = false; | |
4792 | int err; | |
4793 | ||
4794 | if (!skb) { | |
4795 | seq = atomic_inc_return(¬ify_genl_seq); | |
4796 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4797 | err = -ENOMEM; | |
4798 | if (!skb) | |
4799 | goto failed; | |
4800 | multicast = true; | |
4801 | } | |
4802 | ||
4803 | err = -EMSGSIZE; | |
4804 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_PEER_DEVICE_STATE); | |
4805 | if (!dh) | |
4806 | goto nla_put_failure; | |
4807 | dh->minor = -1U; | |
4808 | dh->ret_code = NO_ERROR; | |
4809 | if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) || | |
4810 | nla_put_notification_header(skb, type) || | |
4811 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4812 | peer_device_info_to_skb(skb, peer_device_info, true))) | |
4813 | goto nla_put_failure; | |
4814 | peer_device_to_statistics(&peer_device_statistics, peer_device); | |
4815 | peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN)); | |
4816 | genlmsg_end(skb, dh); | |
4817 | if (multicast) { | |
d38f8612 | 4818 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4819 | /* skb has been consumed or freed in netlink_broadcast() */ |
4820 | if (err && err != -ESRCH) | |
4821 | goto failed; | |
4822 | } | |
4823 | return; | |
4824 | ||
4825 | nla_put_failure: | |
4826 | nlmsg_free(skb); | |
4827 | failed: | |
4828 | drbd_err(peer_device, "Error %d while broadcasting event. Event seq:%u\n", | |
4829 | err, seq); | |
4830 | } | |
4831 | ||
4832 | void notify_helper(enum drbd_notification_type type, | |
4833 | struct drbd_device *device, struct drbd_connection *connection, | |
4834 | const char *name, int status) | |
4835 | { | |
4836 | struct drbd_resource *resource = device ? device->resource : connection->resource; | |
4837 | struct drbd_helper_info helper_info; | |
4838 | unsigned int seq = atomic_inc_return(¬ify_genl_seq); | |
4839 | struct sk_buff *skb = NULL; | |
4840 | struct drbd_genlmsghdr *dh; | |
4841 | int err; | |
4842 | ||
4843 | strlcpy(helper_info.helper_name, name, sizeof(helper_info.helper_name)); | |
4844 | helper_info.helper_name_len = min(strlen(name), sizeof(helper_info.helper_name)); | |
4845 | helper_info.helper_status = status; | |
4846 | ||
4847 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4848 | err = -ENOMEM; | |
4849 | if (!skb) | |
4850 | goto fail; | |
4851 | ||
4852 | err = -EMSGSIZE; | |
4853 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_HELPER); | |
4854 | if (!dh) | |
4855 | goto fail; | |
4856 | dh->minor = device ? device->minor : -1; | |
4857 | dh->ret_code = NO_ERROR; | |
4858 | mutex_lock(¬ification_mutex); | |
4859 | if (nla_put_drbd_cfg_context(skb, resource, connection, device) || | |
4860 | nla_put_notification_header(skb, type) || | |
4861 | drbd_helper_info_to_skb(skb, &helper_info, true)) | |
4862 | goto unlock_fail; | |
4863 | genlmsg_end(skb, dh); | |
d38f8612 | 4864 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4865 | skb = NULL; |
4866 | /* skb has been consumed or freed in netlink_broadcast() */ | |
4867 | if (err && err != -ESRCH) | |
4868 | goto unlock_fail; | |
4869 | mutex_unlock(¬ification_mutex); | |
4870 | return; | |
4871 | ||
4872 | unlock_fail: | |
4873 | mutex_unlock(¬ification_mutex); | |
4874 | fail: | |
4875 | nlmsg_free(skb); | |
4876 | drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n", | |
4877 | err, seq); | |
4878 | } | |
4879 | ||
4880 | static void notify_initial_state_done(struct sk_buff *skb, unsigned int seq) | |
4881 | { | |
4882 | struct drbd_genlmsghdr *dh; | |
4883 | int err; | |
4884 | ||
4885 | err = -EMSGSIZE; | |
4886 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_INITIAL_STATE_DONE); | |
4887 | if (!dh) | |
4888 | goto nla_put_failure; | |
4889 | dh->minor = -1U; | |
4890 | dh->ret_code = NO_ERROR; | |
4891 | if (nla_put_notification_header(skb, NOTIFY_EXISTS)) | |
4892 | goto nla_put_failure; | |
4893 | genlmsg_end(skb, dh); | |
4894 | return; | |
4895 | ||
4896 | nla_put_failure: | |
4897 | nlmsg_free(skb); | |
4898 | pr_err("Error %d sending event. Event seq:%u\n", err, seq); | |
4899 | } | |
4900 | ||
4901 | static void free_state_changes(struct list_head *list) | |
4902 | { | |
4903 | while (!list_empty(list)) { | |
4904 | struct drbd_state_change *state_change = | |
4905 | list_first_entry(list, struct drbd_state_change, list); | |
4906 | list_del(&state_change->list); | |
4907 | forget_state_change(state_change); | |
4908 | } | |
4909 | } | |
4910 | ||
4911 | static unsigned int notifications_for_state_change(struct drbd_state_change *state_change) | |
4912 | { | |
4913 | return 1 + | |
4914 | state_change->n_connections + | |
4915 | state_change->n_devices + | |
4916 | state_change->n_devices * state_change->n_connections; | |
4917 | } | |
4918 | ||
4919 | static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb) | |
4920 | { | |
4921 | struct drbd_state_change *state_change = (struct drbd_state_change *)cb->args[0]; | |
4922 | unsigned int seq = cb->args[2]; | |
4923 | unsigned int n; | |
4924 | enum drbd_notification_type flags = 0; | |
4925 | ||
4926 | /* There is no need for taking notification_mutex here: it doesn't | |
4927 | matter if the initial state events mix with later state chage | |
4928 | events; we can always tell the events apart by the NOTIFY_EXISTS | |
4929 | flag. */ | |
4930 | ||
4931 | cb->args[5]--; | |
4932 | if (cb->args[5] == 1) { | |
4933 | notify_initial_state_done(skb, seq); | |
4934 | goto out; | |
4935 | } | |
4936 | n = cb->args[4]++; | |
4937 | if (cb->args[4] < cb->args[3]) | |
4938 | flags |= NOTIFY_CONTINUES; | |
4939 | if (n < 1) { | |
4940 | notify_resource_state_change(skb, seq, state_change->resource, | |
4941 | NOTIFY_EXISTS | flags); | |
4942 | goto next; | |
4943 | } | |
4944 | n--; | |
4945 | if (n < state_change->n_connections) { | |
4946 | notify_connection_state_change(skb, seq, &state_change->connections[n], | |
4947 | NOTIFY_EXISTS | flags); | |
4948 | goto next; | |
4949 | } | |
4950 | n -= state_change->n_connections; | |
4951 | if (n < state_change->n_devices) { | |
4952 | notify_device_state_change(skb, seq, &state_change->devices[n], | |
4953 | NOTIFY_EXISTS | flags); | |
4954 | goto next; | |
4955 | } | |
4956 | n -= state_change->n_devices; | |
4957 | if (n < state_change->n_devices * state_change->n_connections) { | |
4958 | notify_peer_device_state_change(skb, seq, &state_change->peer_devices[n], | |
4959 | NOTIFY_EXISTS | flags); | |
4960 | goto next; | |
4961 | } | |
4962 | ||
4963 | next: | |
4964 | if (cb->args[4] == cb->args[3]) { | |
4965 | struct drbd_state_change *next_state_change = | |
4966 | list_entry(state_change->list.next, | |
4967 | struct drbd_state_change, list); | |
4968 | cb->args[0] = (long)next_state_change; | |
4969 | cb->args[3] = notifications_for_state_change(next_state_change); | |
4970 | cb->args[4] = 0; | |
4971 | } | |
4972 | out: | |
4973 | return skb->len; | |
4974 | } | |
4975 | ||
4976 | int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb) | |
4977 | { | |
4978 | struct drbd_resource *resource; | |
4979 | LIST_HEAD(head); | |
4980 | ||
4981 | if (cb->args[5] >= 1) { | |
4982 | if (cb->args[5] > 1) | |
4983 | return get_initial_state(skb, cb); | |
4984 | if (cb->args[0]) { | |
4985 | struct drbd_state_change *state_change = | |
4986 | (struct drbd_state_change *)cb->args[0]; | |
4987 | ||
4988 | /* connect list to head */ | |
4989 | list_add(&head, &state_change->list); | |
4990 | free_state_changes(&head); | |
4991 | } | |
4992 | return 0; | |
4993 | } | |
4994 | ||
4995 | cb->args[5] = 2; /* number of iterations */ | |
4996 | mutex_lock(&resources_mutex); | |
4997 | for_each_resource(resource, &drbd_resources) { | |
4998 | struct drbd_state_change *state_change; | |
4999 | ||
5000 | state_change = remember_old_state(resource, GFP_KERNEL); | |
5001 | if (!state_change) { | |
5002 | if (!list_empty(&head)) | |
5003 | free_state_changes(&head); | |
5004 | mutex_unlock(&resources_mutex); | |
5005 | return -ENOMEM; | |
5006 | } | |
5007 | copy_old_to_new_state_change(state_change); | |
5008 | list_add_tail(&state_change->list, &head); | |
5009 | cb->args[5] += notifications_for_state_change(state_change); | |
5010 | } | |
5011 | mutex_unlock(&resources_mutex); | |
5012 | ||
5013 | if (!list_empty(&head)) { | |
5014 | struct drbd_state_change *state_change = | |
5015 | list_entry(head.next, struct drbd_state_change, list); | |
5016 | cb->args[0] = (long)state_change; | |
5017 | cb->args[3] = notifications_for_state_change(state_change); | |
5018 | list_del(&head); /* detach list from head */ | |
5019 | } | |
5020 | ||
5021 | cb->args[2] = cb->nlh->nlmsg_seq; | |
5022 | return get_initial_state(skb, cb); | |
5023 | } |