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) { | |
afa69539 KW |
271 | pr_warn("request: minor=%u, resource=%s; but that minor belongs to resource %s\n", |
272 | adm_ctx->minor, adm_ctx->resource->name, | |
273 | adm_ctx->device->resource->name); | |
a910b123 | 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) { | |
afa69539 KW |
280 | pr_warn("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", |
281 | adm_ctx->minor, adm_ctx->volume, | |
282 | adm_ctx->device->vnr, adm_ctx->device->resource->name); | |
a910b123 | 283 | drbd_msg_put_info(adm_ctx->reply_skb, "minor exists as different volume"); |
3b98c0c2 LE |
284 | return ERR_INVALID_REQUEST; |
285 | } | |
0ace9dfa | 286 | |
9e276872 LE |
287 | /* still, provide adm_ctx->resource always, if possible. */ |
288 | if (!adm_ctx->resource) { | |
289 | adm_ctx->resource = adm_ctx->device ? adm_ctx->device->resource | |
290 | : adm_ctx->connection ? adm_ctx->connection->resource : NULL; | |
291 | if (adm_ctx->resource) | |
292 | kref_get(&adm_ctx->resource->kref); | |
293 | } | |
294 | ||
3b98c0c2 LE |
295 | return NO_ERROR; |
296 | ||
297 | fail: | |
a910b123 LE |
298 | nlmsg_free(adm_ctx->reply_skb); |
299 | adm_ctx->reply_skb = NULL; | |
1e2a2551 | 300 | return err; |
3b98c0c2 LE |
301 | } |
302 | ||
a910b123 LE |
303 | static int drbd_adm_finish(struct drbd_config_context *adm_ctx, |
304 | struct genl_info *info, int retcode) | |
3b98c0c2 | 305 | { |
9e276872 LE |
306 | if (adm_ctx->device) { |
307 | kref_put(&adm_ctx->device->kref, drbd_destroy_device); | |
308 | adm_ctx->device = NULL; | |
309 | } | |
a910b123 LE |
310 | if (adm_ctx->connection) { |
311 | kref_put(&adm_ctx->connection->kref, &drbd_destroy_connection); | |
312 | adm_ctx->connection = NULL; | |
0ace9dfa | 313 | } |
a910b123 LE |
314 | if (adm_ctx->resource) { |
315 | kref_put(&adm_ctx->resource->kref, drbd_destroy_resource); | |
316 | adm_ctx->resource = NULL; | |
4bc76048 | 317 | } |
0ace9dfa | 318 | |
a910b123 | 319 | if (!adm_ctx->reply_skb) |
3b98c0c2 LE |
320 | return -ENOMEM; |
321 | ||
a910b123 LE |
322 | adm_ctx->reply_dh->ret_code = retcode; |
323 | drbd_adm_send_reply(adm_ctx->reply_skb, info); | |
3b98c0c2 LE |
324 | return 0; |
325 | } | |
b411b363 | 326 | |
bde89a9e | 327 | static void setup_khelper_env(struct drbd_connection *connection, char **envp) |
b411b363 | 328 | { |
6b75dced | 329 | char *afs; |
b411b363 | 330 | |
089c075d | 331 | /* FIXME: A future version will not allow this case. */ |
bde89a9e | 332 | if (connection->my_addr_len == 0 || connection->peer_addr_len == 0) |
089c075d AG |
333 | return; |
334 | ||
bde89a9e | 335 | switch (((struct sockaddr *)&connection->peer_addr)->sa_family) { |
089c075d AG |
336 | case AF_INET6: |
337 | afs = "ipv6"; | |
338 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6", | |
bde89a9e | 339 | &((struct sockaddr_in6 *)&connection->peer_addr)->sin6_addr); |
b411b363 | 340 | break; |
089c075d AG |
341 | case AF_INET: |
342 | afs = "ipv4"; | |
343 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
bde89a9e | 344 | &((struct sockaddr_in *)&connection->peer_addr)->sin_addr); |
b411b363 | 345 | break; |
089c075d AG |
346 | default: |
347 | afs = "ssocks"; | |
348 | snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4", | |
bde89a9e | 349 | &((struct sockaddr_in *)&connection->peer_addr)->sin_addr); |
b411b363 | 350 | } |
089c075d | 351 | snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs); |
6b75dced | 352 | } |
b411b363 | 353 | |
b30ab791 | 354 | int drbd_khelper(struct drbd_device *device, char *cmd) |
b411b363 PR |
355 | { |
356 | char *envp[] = { "HOME=/", | |
357 | "TERM=linux", | |
358 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
6b75dced PR |
359 | (char[20]) { }, /* address family */ |
360 | (char[60]) { }, /* address */ | |
b411b363 | 361 | NULL }; |
0982368b | 362 | char mb[14]; |
8ab761e1 | 363 | char *argv[] = {drbd_usermode_helper, cmd, mb, NULL }; |
a6b32bc3 | 364 | struct drbd_connection *connection = first_peer_device(device)->connection; |
6b75dced | 365 | struct sib_info sib; |
b411b363 PR |
366 | int ret; |
367 | ||
bde89a9e AG |
368 | if (current == connection->worker.task) |
369 | set_bit(CALLBACK_PENDING, &connection->flags); | |
c2ba686f | 370 | |
0982368b | 371 | snprintf(mb, 14, "minor-%d", device_to_minor(device)); |
bde89a9e | 372 | setup_khelper_env(connection, envp); |
b411b363 | 373 | |
1090c056 LE |
374 | /* The helper may take some time. |
375 | * write out any unsynced meta data changes now */ | |
b30ab791 | 376 | drbd_md_sync(device); |
1090c056 | 377 | |
8ab761e1 | 378 | drbd_info(device, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, mb); |
3b98c0c2 LE |
379 | sib.sib_reason = SIB_HELPER_PRE; |
380 | sib.helper_name = cmd; | |
b30ab791 | 381 | drbd_bcast_event(device, &sib); |
a2972846 | 382 | notify_helper(NOTIFY_CALL, device, connection, cmd, 0); |
8ab761e1 | 383 | ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC); |
b411b363 | 384 | if (ret) |
d0180171 | 385 | drbd_warn(device, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 386 | drbd_usermode_helper, cmd, mb, |
b411b363 PR |
387 | (ret >> 8) & 0xff, ret); |
388 | else | |
d0180171 | 389 | drbd_info(device, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 390 | drbd_usermode_helper, cmd, mb, |
b411b363 | 391 | (ret >> 8) & 0xff, ret); |
3b98c0c2 LE |
392 | sib.sib_reason = SIB_HELPER_POST; |
393 | sib.helper_exit_code = ret; | |
b30ab791 | 394 | drbd_bcast_event(device, &sib); |
a2972846 | 395 | notify_helper(NOTIFY_RESPONSE, device, connection, cmd, ret); |
b411b363 | 396 | |
bde89a9e AG |
397 | if (current == connection->worker.task) |
398 | clear_bit(CALLBACK_PENDING, &connection->flags); | |
b411b363 PR |
399 | |
400 | if (ret < 0) /* Ignore any ERRNOs we got. */ | |
401 | ret = 0; | |
402 | ||
403 | return ret; | |
404 | } | |
405 | ||
7e5fec31 | 406 | enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd) |
6b75dced PR |
407 | { |
408 | char *envp[] = { "HOME=/", | |
409 | "TERM=linux", | |
410 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
411 | (char[20]) { }, /* address family */ | |
412 | (char[60]) { }, /* address */ | |
413 | NULL }; | |
77c556f6 | 414 | char *resource_name = connection->resource->name; |
8ab761e1 | 415 | char *argv[] = {drbd_usermode_helper, cmd, resource_name, NULL }; |
6b75dced PR |
416 | int ret; |
417 | ||
bde89a9e AG |
418 | setup_khelper_env(connection, envp); |
419 | conn_md_sync(connection); | |
6b75dced | 420 | |
8ab761e1 | 421 | drbd_info(connection, "helper command: %s %s %s\n", drbd_usermode_helper, cmd, resource_name); |
6b75dced | 422 | /* TODO: conn_bcast_event() ?? */ |
a2972846 | 423 | notify_helper(NOTIFY_CALL, NULL, connection, cmd, 0); |
6b75dced | 424 | |
8ab761e1 | 425 | ret = call_usermodehelper(drbd_usermode_helper, argv, envp, UMH_WAIT_PROC); |
6b75dced | 426 | if (ret) |
1ec861eb | 427 | drbd_warn(connection, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 428 | drbd_usermode_helper, cmd, resource_name, |
6b75dced PR |
429 | (ret >> 8) & 0xff, ret); |
430 | else | |
1ec861eb | 431 | drbd_info(connection, "helper command: %s %s %s exit code %u (0x%x)\n", |
8ab761e1 | 432 | drbd_usermode_helper, cmd, resource_name, |
6b75dced PR |
433 | (ret >> 8) & 0xff, ret); |
434 | /* TODO: conn_bcast_event() ?? */ | |
a2972846 | 435 | notify_helper(NOTIFY_RESPONSE, NULL, connection, cmd, ret); |
c2ba686f | 436 | |
b411b363 PR |
437 | if (ret < 0) /* Ignore any ERRNOs we got. */ |
438 | ret = 0; | |
439 | ||
440 | return ret; | |
441 | } | |
442 | ||
bde89a9e | 443 | static enum drbd_fencing_p highest_fencing_policy(struct drbd_connection *connection) |
b411b363 | 444 | { |
cb703454 | 445 | enum drbd_fencing_p fp = FP_NOT_AVAIL; |
c06ece6b | 446 | struct drbd_peer_device *peer_device; |
cb703454 PR |
447 | int vnr; |
448 | ||
695d08fa | 449 | rcu_read_lock(); |
c06ece6b AG |
450 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
451 | struct drbd_device *device = peer_device->device; | |
b30ab791 | 452 | if (get_ldev_if_state(device, D_CONSISTENT)) { |
c06ece6b AG |
453 | struct disk_conf *disk_conf = |
454 | rcu_dereference(peer_device->device->ldev->disk_conf); | |
455 | fp = max_t(enum drbd_fencing_p, fp, disk_conf->fencing); | |
b30ab791 | 456 | put_ldev(device); |
cb703454 PR |
457 | } |
458 | } | |
695d08fa | 459 | rcu_read_unlock(); |
cb703454 PR |
460 | |
461 | return fp; | |
462 | } | |
463 | ||
7bd000cb LE |
464 | static bool resource_is_supended(struct drbd_resource *resource) |
465 | { | |
466 | return resource->susp || resource->susp_fen || resource->susp_nod; | |
467 | } | |
468 | ||
bde89a9e | 469 | bool conn_try_outdate_peer(struct drbd_connection *connection) |
b411b363 | 470 | { |
7bd000cb | 471 | struct drbd_resource * const resource = connection->resource; |
28e448bb | 472 | unsigned int connect_cnt; |
cb703454 PR |
473 | union drbd_state mask = { }; |
474 | union drbd_state val = { }; | |
475 | enum drbd_fencing_p fp; | |
b411b363 PR |
476 | char *ex_to_string; |
477 | int r; | |
b411b363 | 478 | |
7bd000cb | 479 | spin_lock_irq(&resource->req_lock); |
bde89a9e | 480 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
1ec861eb | 481 | drbd_err(connection, "Expected cstate < C_WF_REPORT_PARAMS\n"); |
7bd000cb | 482 | spin_unlock_irq(&resource->req_lock); |
cb703454 PR |
483 | return false; |
484 | } | |
b411b363 | 485 | |
bde89a9e | 486 | connect_cnt = connection->connect_cnt; |
7bd000cb | 487 | spin_unlock_irq(&resource->req_lock); |
28e448bb | 488 | |
bde89a9e | 489 | fp = highest_fencing_policy(connection); |
cb703454 PR |
490 | switch (fp) { |
491 | case FP_NOT_AVAIL: | |
1ec861eb | 492 | drbd_warn(connection, "Not fencing peer, I'm not even Consistent myself.\n"); |
7bd000cb LE |
493 | spin_lock_irq(&resource->req_lock); |
494 | if (connection->cstate < C_WF_REPORT_PARAMS) { | |
495 | _conn_request_state(connection, | |
496 | (union drbd_state) { { .susp_fen = 1 } }, | |
497 | (union drbd_state) { { .susp_fen = 0 } }, | |
498 | CS_VERBOSE | CS_HARD | CS_DC_SUSP); | |
499 | /* We are no longer suspended due to the fencing policy. | |
500 | * We may still be suspended due to the on-no-data-accessible policy. | |
501 | * If that was OND_IO_ERROR, fail pending requests. */ | |
502 | if (!resource_is_supended(resource)) | |
503 | _tl_restart(connection, CONNECTION_LOST_WHILE_PENDING); | |
504 | } | |
505 | /* Else: in case we raced with a connection handshake, | |
506 | * let the handshake figure out if we maybe can RESEND, | |
507 | * and do not resume/fail pending requests here. | |
508 | * Worst case is we stay suspended for now, which may be | |
509 | * resolved by either re-establishing the replication link, or | |
510 | * the next link failure, or eventually the administrator. */ | |
511 | spin_unlock_irq(&resource->req_lock); | |
512 | return false; | |
513 | ||
cb703454 PR |
514 | case FP_DONT_CARE: |
515 | return true; | |
516 | default: ; | |
b411b363 PR |
517 | } |
518 | ||
bde89a9e | 519 | r = conn_khelper(connection, "fence-peer"); |
b411b363 PR |
520 | |
521 | switch ((r>>8) & 0xff) { | |
7e5fec31 | 522 | case P_INCONSISTENT: /* peer is inconsistent */ |
b411b363 | 523 | ex_to_string = "peer is inconsistent or worse"; |
cb703454 PR |
524 | mask.pdsk = D_MASK; |
525 | val.pdsk = D_INCONSISTENT; | |
b411b363 | 526 | break; |
7e5fec31 | 527 | case P_OUTDATED: /* peer got outdated, or was already outdated */ |
b411b363 | 528 | ex_to_string = "peer was fenced"; |
cb703454 PR |
529 | mask.pdsk = D_MASK; |
530 | val.pdsk = D_OUTDATED; | |
b411b363 | 531 | break; |
7e5fec31 | 532 | case P_DOWN: /* peer was down */ |
bde89a9e | 533 | if (conn_highest_disk(connection) == D_UP_TO_DATE) { |
b411b363 PR |
534 | /* we will(have) create(d) a new UUID anyways... */ |
535 | ex_to_string = "peer is unreachable, assumed to be dead"; | |
cb703454 PR |
536 | mask.pdsk = D_MASK; |
537 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
538 | } else { |
539 | ex_to_string = "peer unreachable, doing nothing since disk != UpToDate"; | |
b411b363 PR |
540 | } |
541 | break; | |
7e5fec31 | 542 | case P_PRIMARY: /* Peer is primary, voluntarily outdate myself. |
b411b363 PR |
543 | * This is useful when an unconnected R_SECONDARY is asked to |
544 | * become R_PRIMARY, but finds the other peer being active. */ | |
545 | ex_to_string = "peer is active"; | |
1ec861eb | 546 | drbd_warn(connection, "Peer is primary, outdating myself.\n"); |
cb703454 PR |
547 | mask.disk = D_MASK; |
548 | val.disk = D_OUTDATED; | |
b411b363 | 549 | break; |
7e5fec31 FF |
550 | case P_FENCING: |
551 | /* THINK: do we need to handle this | |
552 | * like case 4, or more like case 5? */ | |
b411b363 | 553 | if (fp != FP_STONITH) |
1ec861eb | 554 | drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n"); |
b411b363 | 555 | ex_to_string = "peer was stonithed"; |
cb703454 PR |
556 | mask.pdsk = D_MASK; |
557 | val.pdsk = D_OUTDATED; | |
b411b363 PR |
558 | break; |
559 | default: | |
560 | /* The script is broken ... */ | |
1ec861eb | 561 | drbd_err(connection, "fence-peer helper broken, returned %d\n", (r>>8)&0xff); |
cb703454 | 562 | return false; /* Eventually leave IO frozen */ |
b411b363 PR |
563 | } |
564 | ||
1ec861eb | 565 | drbd_info(connection, "fence-peer helper returned %d (%s)\n", |
cb703454 | 566 | (r>>8) & 0xff, ex_to_string); |
fb22c402 | 567 | |
cb703454 | 568 | /* Not using |
bde89a9e | 569 | conn_request_state(connection, mask, val, CS_VERBOSE); |
cb703454 PR |
570 | here, because we might were able to re-establish the connection in the |
571 | meantime. */ | |
7bd000cb | 572 | spin_lock_irq(&resource->req_lock); |
bde89a9e AG |
573 | if (connection->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &connection->flags)) { |
574 | if (connection->connect_cnt != connect_cnt) | |
28e448bb PR |
575 | /* In case the connection was established and droped |
576 | while the fence-peer handler was running, ignore it */ | |
1ec861eb | 577 | drbd_info(connection, "Ignoring fence-peer exit code\n"); |
28e448bb | 578 | else |
bde89a9e | 579 | _conn_request_state(connection, mask, val, CS_VERBOSE); |
28e448bb | 580 | } |
7bd000cb | 581 | spin_unlock_irq(&resource->req_lock); |
cb703454 | 582 | |
bde89a9e | 583 | return conn_highest_pdsk(connection) <= D_OUTDATED; |
b411b363 PR |
584 | } |
585 | ||
87f7be4c PR |
586 | static int _try_outdate_peer_async(void *data) |
587 | { | |
bde89a9e | 588 | struct drbd_connection *connection = (struct drbd_connection *)data; |
87f7be4c | 589 | |
bde89a9e | 590 | conn_try_outdate_peer(connection); |
87f7be4c | 591 | |
05a10ec7 | 592 | kref_put(&connection->kref, drbd_destroy_connection); |
87f7be4c PR |
593 | return 0; |
594 | } | |
595 | ||
bde89a9e | 596 | void conn_try_outdate_peer_async(struct drbd_connection *connection) |
87f7be4c PR |
597 | { |
598 | struct task_struct *opa; | |
599 | ||
bde89a9e | 600 | kref_get(&connection->kref); |
fee10990 | 601 | /* We may have just sent a signal to this thread |
bbc1c5e8 LE |
602 | * to get it out of some blocking network function. |
603 | * Clear signals; otherwise kthread_run(), which internally uses | |
604 | * wait_on_completion_killable(), will mistake our pending signal | |
605 | * for a new fatal signal and fail. */ | |
606 | flush_signals(current); | |
bde89a9e | 607 | opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h"); |
9dc9fbb3 | 608 | if (IS_ERR(opa)) { |
1ec861eb | 609 | drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n"); |
05a10ec7 | 610 | kref_put(&connection->kref, drbd_destroy_connection); |
9dc9fbb3 | 611 | } |
87f7be4c | 612 | } |
b411b363 | 613 | |
bf885f8a | 614 | enum drbd_state_rv |
44a4d551 | 615 | drbd_set_role(struct drbd_device *const device, enum drbd_role new_role, int force) |
b411b363 | 616 | { |
44a4d551 LE |
617 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
618 | struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL; | |
b411b363 | 619 | const int max_tries = 4; |
bf885f8a | 620 | enum drbd_state_rv rv = SS_UNKNOWN_ERROR; |
44ed167d | 621 | struct net_conf *nc; |
b411b363 PR |
622 | int try = 0; |
623 | int forced = 0; | |
624 | union drbd_state mask, val; | |
b411b363 | 625 | |
b6f85ef9 AG |
626 | if (new_role == R_PRIMARY) { |
627 | struct drbd_connection *connection; | |
628 | ||
629 | /* Detect dead peers as soon as possible. */ | |
630 | ||
631 | rcu_read_lock(); | |
632 | for_each_connection(connection, device->resource) | |
633 | request_ping(connection); | |
634 | rcu_read_unlock(); | |
635 | } | |
b411b363 | 636 | |
b30ab791 | 637 | mutex_lock(device->state_mutex); |
b411b363 PR |
638 | |
639 | mask.i = 0; mask.role = R_MASK; | |
640 | val.i = 0; val.role = new_role; | |
641 | ||
642 | while (try++ < max_tries) { | |
a8821531 | 643 | rv = _drbd_request_state_holding_state_mutex(device, mask, val, CS_WAIT_COMPLETE); |
b411b363 PR |
644 | |
645 | /* in case we first succeeded to outdate, | |
646 | * but now suddenly could establish a connection */ | |
bf885f8a | 647 | if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) { |
b411b363 PR |
648 | val.pdsk = 0; |
649 | mask.pdsk = 0; | |
650 | continue; | |
651 | } | |
652 | ||
bf885f8a | 653 | if (rv == SS_NO_UP_TO_DATE_DISK && force && |
b30ab791 AG |
654 | (device->state.disk < D_UP_TO_DATE && |
655 | device->state.disk >= D_INCONSISTENT)) { | |
b411b363 PR |
656 | mask.disk = D_MASK; |
657 | val.disk = D_UP_TO_DATE; | |
658 | forced = 1; | |
659 | continue; | |
660 | } | |
661 | ||
bf885f8a | 662 | if (rv == SS_NO_UP_TO_DATE_DISK && |
b30ab791 | 663 | device->state.disk == D_CONSISTENT && mask.pdsk == 0) { |
0b0ba1ef | 664 | D_ASSERT(device, device->state.pdsk == D_UNKNOWN); |
b411b363 | 665 | |
44a4d551 | 666 | if (conn_try_outdate_peer(connection)) { |
b411b363 PR |
667 | val.disk = D_UP_TO_DATE; |
668 | mask.disk = D_MASK; | |
669 | } | |
b411b363 PR |
670 | continue; |
671 | } | |
672 | ||
bf885f8a | 673 | if (rv == SS_NOTHING_TO_DO) |
3b98c0c2 | 674 | goto out; |
bf885f8a | 675 | if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { |
44a4d551 | 676 | if (!conn_try_outdate_peer(connection) && force) { |
d0180171 | 677 | drbd_warn(device, "Forced into split brain situation!\n"); |
cb703454 PR |
678 | mask.pdsk = D_MASK; |
679 | val.pdsk = D_OUTDATED; | |
b411b363 | 680 | |
cb703454 | 681 | } |
b411b363 PR |
682 | continue; |
683 | } | |
bf885f8a | 684 | if (rv == SS_TWO_PRIMARIES) { |
b411b363 PR |
685 | /* Maybe the peer is detected as dead very soon... |
686 | retry at most once more in this case. */ | |
9848b6dd LE |
687 | if (try < max_tries) { |
688 | int timeo; | |
b411b363 | 689 | try = max_tries - 1; |
9848b6dd LE |
690 | rcu_read_lock(); |
691 | nc = rcu_dereference(connection->net_conf); | |
692 | timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1; | |
693 | rcu_read_unlock(); | |
694 | schedule_timeout_interruptible(timeo); | |
695 | } | |
b411b363 PR |
696 | continue; |
697 | } | |
bf885f8a | 698 | if (rv < SS_SUCCESS) { |
b30ab791 | 699 | rv = _drbd_request_state(device, mask, val, |
b411b363 | 700 | CS_VERBOSE + CS_WAIT_COMPLETE); |
bf885f8a | 701 | if (rv < SS_SUCCESS) |
3b98c0c2 | 702 | goto out; |
b411b363 PR |
703 | } |
704 | break; | |
705 | } | |
706 | ||
bf885f8a | 707 | if (rv < SS_SUCCESS) |
3b98c0c2 | 708 | goto out; |
b411b363 PR |
709 | |
710 | if (forced) | |
d0180171 | 711 | drbd_warn(device, "Forced to consider local data as UpToDate!\n"); |
b411b363 PR |
712 | |
713 | /* Wait until nothing is on the fly :) */ | |
b30ab791 | 714 | wait_event(device->misc_wait, atomic_read(&device->ap_pending_cnt) == 0); |
b411b363 | 715 | |
b6dd1a89 LE |
716 | /* FIXME also wait for all pending P_BARRIER_ACK? */ |
717 | ||
b411b363 | 718 | if (new_role == R_SECONDARY) { |
b30ab791 AG |
719 | if (get_ldev(device)) { |
720 | device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; | |
721 | put_ldev(device); | |
b411b363 PR |
722 | } |
723 | } else { | |
66ce6dbc | 724 | mutex_lock(&device->resource->conf_update); |
44a4d551 | 725 | nc = connection->net_conf; |
44ed167d | 726 | if (nc) |
6139f60d | 727 | nc->discard_my_data = 0; /* without copy; single bit op is atomic */ |
66ce6dbc | 728 | mutex_unlock(&device->resource->conf_update); |
91fd4dad | 729 | |
b30ab791 AG |
730 | if (get_ldev(device)) { |
731 | if (((device->state.conn < C_CONNECTED || | |
732 | device->state.pdsk <= D_FAILED) | |
733 | && device->ldev->md.uuid[UI_BITMAP] == 0) || forced) | |
734 | drbd_uuid_new_current(device); | |
b411b363 | 735 | |
b30ab791 AG |
736 | device->ldev->md.uuid[UI_CURRENT] |= (u64)1; |
737 | put_ldev(device); | |
b411b363 PR |
738 | } |
739 | } | |
740 | ||
19f843aa LE |
741 | /* writeout of activity log covered areas of the bitmap |
742 | * to stable storage done in after state change already */ | |
b411b363 | 743 | |
b30ab791 | 744 | if (device->state.conn >= C_WF_REPORT_PARAMS) { |
b411b363 PR |
745 | /* if this was forced, we should consider sync */ |
746 | if (forced) | |
44a4d551 LE |
747 | drbd_send_uuids(peer_device); |
748 | drbd_send_current_state(peer_device); | |
b411b363 PR |
749 | } |
750 | ||
b30ab791 | 751 | drbd_md_sync(device); |
720979fb | 752 | set_disk_ro(device->vdisk, new_role == R_SECONDARY); |
b30ab791 | 753 | kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE); |
3b98c0c2 | 754 | out: |
b30ab791 | 755 | mutex_unlock(device->state_mutex); |
bf885f8a | 756 | return rv; |
b411b363 PR |
757 | } |
758 | ||
3b98c0c2 | 759 | static const char *from_attrs_err_to_txt(int err) |
ef50a3e3 | 760 | { |
3b98c0c2 LE |
761 | return err == -ENOMSG ? "required attribute missing" : |
762 | err == -EOPNOTSUPP ? "unknown mandatory attribute" : | |
f399002e | 763 | err == -EEXIST ? "can not change invariant setting" : |
3b98c0c2 | 764 | "invalid attribute value"; |
ef50a3e3 | 765 | } |
b411b363 | 766 | |
3b98c0c2 | 767 | int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 768 | { |
a910b123 | 769 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
770 | struct set_role_parms parms; |
771 | int err; | |
772 | enum drbd_ret_code retcode; | |
b411b363 | 773 | |
a910b123 | 774 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
775 | if (!adm_ctx.reply_skb) |
776 | return retcode; | |
777 | if (retcode != NO_ERROR) | |
778 | goto out; | |
b411b363 | 779 | |
3b98c0c2 LE |
780 | memset(&parms, 0, sizeof(parms)); |
781 | if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { | |
f399002e | 782 | err = set_role_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
783 | if (err) { |
784 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 785 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
786 | goto out; |
787 | } | |
788 | } | |
9e276872 LE |
789 | genl_unlock(); |
790 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 791 | |
3b98c0c2 | 792 | if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) |
b30ab791 | 793 | retcode = drbd_set_role(adm_ctx.device, R_PRIMARY, parms.assume_uptodate); |
3b98c0c2 | 794 | else |
b30ab791 | 795 | retcode = drbd_set_role(adm_ctx.device, R_SECONDARY, 0); |
9e276872 LE |
796 | |
797 | mutex_unlock(&adm_ctx.resource->adm_mutex); | |
798 | genl_lock(); | |
3b98c0c2 | 799 | out: |
a910b123 | 800 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
801 | return 0; |
802 | } | |
803 | ||
ae8bf312 LE |
804 | /* Initializes the md.*_offset members, so we are able to find |
805 | * the on disk meta data. | |
806 | * | |
807 | * We currently have two possible layouts: | |
808 | * external: | |
809 | * |----------- md_size_sect ------------------| | |
810 | * [ 4k superblock ][ activity log ][ Bitmap ] | |
811 | * | al_offset == 8 | | |
812 | * | bm_offset = al_offset + X | | |
813 | * ==> bitmap sectors = md_size_sect - bm_offset | |
814 | * | |
815 | * internal: | |
816 | * |----------- md_size_sect ------------------| | |
817 | * [data.....][ Bitmap ][ activity log ][ 4k superblock ] | |
818 | * | al_offset < 0 | | |
819 | * | bm_offset = al_offset - Y | | |
820 | * ==> bitmap sectors = Y = al_offset - bm_offset | |
821 | * | |
822 | * Activity log size used to be fixed 32kB, | |
823 | * but is about to become configurable. | |
824 | */ | |
b30ab791 | 825 | static void drbd_md_set_sector_offsets(struct drbd_device *device, |
b411b363 PR |
826 | struct drbd_backing_dev *bdev) |
827 | { | |
828 | sector_t md_size_sect = 0; | |
c04ccaa6 | 829 | unsigned int al_size_sect = bdev->md.al_size_4k * 8; |
daeda1cc | 830 | |
3a4d4eb3 LE |
831 | bdev->md.md_offset = drbd_md_ss(bdev); |
832 | ||
68e41a43 | 833 | switch (bdev->md.meta_dev_idx) { |
b411b363 PR |
834 | default: |
835 | /* v07 style fixed size indexed meta data */ | |
ae8bf312 | 836 | bdev->md.md_size_sect = MD_128MB_SECT; |
ae8bf312 LE |
837 | bdev->md.al_offset = MD_4kB_SECT; |
838 | bdev->md.bm_offset = MD_4kB_SECT + al_size_sect; | |
b411b363 PR |
839 | break; |
840 | case DRBD_MD_INDEX_FLEX_EXT: | |
841 | /* just occupy the full device; unit: sectors */ | |
842 | bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev); | |
ae8bf312 LE |
843 | bdev->md.al_offset = MD_4kB_SECT; |
844 | bdev->md.bm_offset = MD_4kB_SECT + al_size_sect; | |
b411b363 PR |
845 | break; |
846 | case DRBD_MD_INDEX_INTERNAL: | |
847 | case DRBD_MD_INDEX_FLEX_INT: | |
b411b363 | 848 | /* al size is still fixed */ |
ae8bf312 | 849 | bdev->md.al_offset = -al_size_sect; |
b411b363 PR |
850 | /* we need (slightly less than) ~ this much bitmap sectors: */ |
851 | md_size_sect = drbd_get_capacity(bdev->backing_bdev); | |
852 | md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT); | |
853 | md_size_sect = BM_SECT_TO_EXT(md_size_sect); | |
854 | md_size_sect = ALIGN(md_size_sect, 8); | |
855 | ||
856 | /* plus the "drbd meta data super block", | |
857 | * and the activity log; */ | |
ae8bf312 | 858 | md_size_sect += MD_4kB_SECT + al_size_sect; |
b411b363 PR |
859 | |
860 | bdev->md.md_size_sect = md_size_sect; | |
861 | /* bitmap offset is adjusted by 'super' block size */ | |
ae8bf312 | 862 | bdev->md.bm_offset = -md_size_sect + MD_4kB_SECT; |
b411b363 PR |
863 | break; |
864 | } | |
865 | } | |
866 | ||
4b0715f0 | 867 | /* input size is expected to be in KB */ |
b411b363 PR |
868 | char *ppsize(char *buf, unsigned long long size) |
869 | { | |
4b0715f0 LE |
870 | /* Needs 9 bytes at max including trailing NUL: |
871 | * -1ULL ==> "16384 EB" */ | |
b411b363 PR |
872 | static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' }; |
873 | int base = 0; | |
4b0715f0 | 874 | while (size >= 10000 && base < sizeof(units)-1) { |
b411b363 PR |
875 | /* shift + round */ |
876 | size = (size >> 10) + !!(size & (1<<9)); | |
877 | base++; | |
878 | } | |
4b0715f0 | 879 | sprintf(buf, "%u %cB", (unsigned)size, units[base]); |
b411b363 PR |
880 | |
881 | return buf; | |
882 | } | |
883 | ||
884 | /* there is still a theoretical deadlock when called from receiver | |
885 | * on an D_INCONSISTENT R_PRIMARY: | |
886 | * remote READ does inc_ap_bio, receiver would need to receive answer | |
887 | * packet from remote to dec_ap_bio again. | |
888 | * receiver receive_sizes(), comes here, | |
889 | * waits for ap_bio_cnt == 0. -> deadlock. | |
890 | * but this cannot happen, actually, because: | |
891 | * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable | |
892 | * (not connected, or bad/no disk on peer): | |
893 | * see drbd_fail_request_early, ap_bio_cnt is zero. | |
894 | * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: | |
895 | * peer may not initiate a resize. | |
896 | */ | |
3b98c0c2 LE |
897 | /* Note these are not to be confused with |
898 | * drbd_adm_suspend_io/drbd_adm_resume_io, | |
899 | * which are (sub) state changes triggered by admin (drbdsetup), | |
900 | * and can be long lived. | |
b30ab791 | 901 | * This changes an device->flag, is triggered by drbd internals, |
3b98c0c2 | 902 | * and should be short-lived. */ |
7dbb4386 PR |
903 | /* It needs to be a counter, since multiple threads might |
904 | independently suspend and resume IO. */ | |
b30ab791 | 905 | void drbd_suspend_io(struct drbd_device *device) |
b411b363 | 906 | { |
7dbb4386 | 907 | atomic_inc(&device->suspend_cnt); |
b30ab791 | 908 | if (drbd_suspended(device)) |
265be2d0 | 909 | return; |
b30ab791 | 910 | wait_event(device->misc_wait, !atomic_read(&device->ap_bio_cnt)); |
b411b363 PR |
911 | } |
912 | ||
b30ab791 | 913 | void drbd_resume_io(struct drbd_device *device) |
b411b363 | 914 | { |
7dbb4386 PR |
915 | if (atomic_dec_and_test(&device->suspend_cnt)) |
916 | wake_up(&device->misc_wait); | |
b411b363 PR |
917 | } |
918 | ||
919 | /** | |
920 | * drbd_determine_dev_size() - Sets the right device size obeying all constraints | |
b30ab791 | 921 | * @device: DRBD device. |
b411b363 PR |
922 | * |
923 | * Returns 0 on success, negative return values indicate errors. | |
924 | * You should call drbd_md_sync() after calling this function. | |
925 | */ | |
d752b269 | 926 | enum determine_dev_size |
b30ab791 | 927 | drbd_determine_dev_size(struct drbd_device *device, enum dds_flags flags, struct resize_parms *rs) __must_hold(local) |
b411b363 | 928 | { |
8011e249 LE |
929 | struct md_offsets_and_sizes { |
930 | u64 last_agreed_sect; | |
931 | u64 md_offset; | |
932 | s32 al_offset; | |
933 | s32 bm_offset; | |
934 | u32 md_size_sect; | |
935 | ||
936 | u32 al_stripes; | |
937 | u32 al_stripe_size_4k; | |
938 | } prev; | |
939 | sector_t u_size, size; | |
b30ab791 | 940 | struct drbd_md *md = &device->ldev->md; |
d752b269 | 941 | void *buffer; |
b411b363 PR |
942 | |
943 | int md_moved, la_size_changed; | |
e96c9633 | 944 | enum determine_dev_size rv = DS_UNCHANGED; |
b411b363 | 945 | |
5f7c0124 LE |
946 | /* We may change the on-disk offsets of our meta data below. Lock out |
947 | * anything that may cause meta data IO, to avoid acting on incomplete | |
948 | * layout changes or scribbling over meta data that is in the process | |
949 | * of being moved. | |
b411b363 | 950 | * |
5f7c0124 LE |
951 | * Move is not exactly correct, btw, currently we have all our meta |
952 | * data in core memory, to "move" it we just write it all out, there | |
953 | * are no reads. */ | |
b30ab791 | 954 | drbd_suspend_io(device); |
e37d2438 | 955 | buffer = drbd_md_get_buffer(device, __func__); /* Lock meta-data IO */ |
d752b269 | 956 | if (!buffer) { |
b30ab791 | 957 | drbd_resume_io(device); |
d752b269 PR |
958 | return DS_ERROR; |
959 | } | |
b411b363 | 960 | |
8011e249 LE |
961 | /* remember current offset and sizes */ |
962 | prev.last_agreed_sect = md->la_size_sect; | |
963 | prev.md_offset = md->md_offset; | |
964 | prev.al_offset = md->al_offset; | |
965 | prev.bm_offset = md->bm_offset; | |
966 | prev.md_size_sect = md->md_size_sect; | |
967 | prev.al_stripes = md->al_stripes; | |
968 | prev.al_stripe_size_4k = md->al_stripe_size_4k; | |
b411b363 | 969 | |
d752b269 PR |
970 | if (rs) { |
971 | /* rs is non NULL if we should change the AL layout only */ | |
d752b269 PR |
972 | md->al_stripes = rs->al_stripes; |
973 | md->al_stripe_size_4k = rs->al_stripe_size / 4; | |
974 | md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4; | |
975 | } | |
976 | ||
b30ab791 | 977 | drbd_md_set_sector_offsets(device, device->ldev); |
b411b363 | 978 | |
daeda1cc | 979 | rcu_read_lock(); |
b30ab791 | 980 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
daeda1cc | 981 | rcu_read_unlock(); |
b30ab791 | 982 | size = drbd_new_dev_size(device, device->ldev, u_size, flags & DDSF_FORCED); |
b411b363 | 983 | |
8011e249 | 984 | if (size < prev.last_agreed_sect) { |
d752b269 PR |
985 | if (rs && u_size == 0) { |
986 | /* Remove "rs &&" later. This check should always be active, but | |
987 | right now the receiver expects the permissive behavior */ | |
d0180171 | 988 | drbd_warn(device, "Implicit shrink not allowed. " |
d752b269 PR |
989 | "Use --size=%llus for explicit shrink.\n", |
990 | (unsigned long long)size); | |
991 | rv = DS_ERROR_SHRINK; | |
992 | } | |
993 | if (u_size > size) | |
994 | rv = DS_ERROR_SPACE_MD; | |
995 | if (rv != DS_UNCHANGED) | |
996 | goto err_out; | |
997 | } | |
998 | ||
b30ab791 AG |
999 | if (drbd_get_capacity(device->this_bdev) != size || |
1000 | drbd_bm_capacity(device) != size) { | |
b411b363 | 1001 | int err; |
b30ab791 | 1002 | err = drbd_bm_resize(device, size, !(flags & DDSF_NO_RESYNC)); |
b411b363 PR |
1003 | if (unlikely(err)) { |
1004 | /* currently there is only one error: ENOMEM! */ | |
8011e249 | 1005 | size = drbd_bm_capacity(device); |
b411b363 | 1006 | if (size == 0) { |
d0180171 | 1007 | drbd_err(device, "OUT OF MEMORY! " |
b411b363 PR |
1008 | "Could not allocate bitmap!\n"); |
1009 | } else { | |
d0180171 | 1010 | drbd_err(device, "BM resizing failed. " |
8011e249 | 1011 | "Leaving size unchanged\n"); |
b411b363 | 1012 | } |
e96c9633 | 1013 | rv = DS_ERROR; |
b411b363 PR |
1014 | } |
1015 | /* racy, see comments above. */ | |
b30ab791 | 1016 | drbd_set_my_capacity(device, size); |
8011e249 | 1017 | md->la_size_sect = size; |
b411b363 | 1018 | } |
d752b269 PR |
1019 | if (rv <= DS_ERROR) |
1020 | goto err_out; | |
b411b363 | 1021 | |
8011e249 | 1022 | la_size_changed = (prev.last_agreed_sect != md->la_size_sect); |
b411b363 | 1023 | |
8011e249 LE |
1024 | md_moved = prev.md_offset != md->md_offset |
1025 | || prev.md_size_sect != md->md_size_sect; | |
b411b363 | 1026 | |
d752b269 PR |
1027 | if (la_size_changed || md_moved || rs) { |
1028 | u32 prev_flags; | |
24dccabb | 1029 | |
fcb09674 LE |
1030 | /* We do some synchronous IO below, which may take some time. |
1031 | * Clear the timer, to avoid scary "timer expired!" messages, | |
1032 | * "Superblock" is written out at least twice below, anyways. */ | |
1033 | del_timer(&device->md_sync_timer); | |
d752b269 | 1034 | |
5f7c0124 LE |
1035 | /* We won't change the "al-extents" setting, we just may need |
1036 | * to move the on-disk location of the activity log ringbuffer. | |
1037 | * Lock for transaction is good enough, it may well be "dirty" | |
1038 | * or even "starving". */ | |
1039 | wait_event(device->al_wait, lc_try_lock_for_transaction(device->act_log)); | |
1040 | ||
1041 | /* mark current on-disk bitmap and activity log as unreliable */ | |
d752b269 | 1042 | prev_flags = md->flags; |
5f7c0124 | 1043 | md->flags |= MDF_FULL_SYNC | MDF_AL_DISABLED; |
b30ab791 | 1044 | drbd_md_write(device, buffer); |
d752b269 | 1045 | |
5f7c0124 LE |
1046 | drbd_al_initialize(device, buffer); |
1047 | ||
d0180171 | 1048 | drbd_info(device, "Writing the whole bitmap, %s\n", |
b411b363 PR |
1049 | la_size_changed && md_moved ? "size changed and md moved" : |
1050 | la_size_changed ? "size changed" : "md moved"); | |
20ceb2b2 | 1051 | /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ |
b30ab791 | 1052 | drbd_bitmap_io(device, md_moved ? &drbd_bm_write_all : &drbd_bm_write, |
d752b269 | 1053 | "size changed", BM_LOCKED_MASK); |
d752b269 | 1054 | |
5f7c0124 LE |
1055 | /* on-disk bitmap and activity log is authoritative again |
1056 | * (unless there was an IO error meanwhile...) */ | |
d752b269 | 1057 | md->flags = prev_flags; |
b30ab791 | 1058 | drbd_md_write(device, buffer); |
d752b269 PR |
1059 | |
1060 | if (rs) | |
d0180171 AG |
1061 | drbd_info(device, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n", |
1062 | md->al_stripes, md->al_stripe_size_4k * 4); | |
b411b363 PR |
1063 | } |
1064 | ||
8011e249 LE |
1065 | if (size > prev.last_agreed_sect) |
1066 | rv = prev.last_agreed_sect ? DS_GREW : DS_GREW_FROM_ZERO; | |
1067 | if (size < prev.last_agreed_sect) | |
e96c9633 | 1068 | rv = DS_SHRUNK; |
d752b269 PR |
1069 | |
1070 | if (0) { | |
1071 | err_out: | |
8011e249 LE |
1072 | /* restore previous offset and sizes */ |
1073 | md->la_size_sect = prev.last_agreed_sect; | |
1074 | md->md_offset = prev.md_offset; | |
1075 | md->al_offset = prev.al_offset; | |
1076 | md->bm_offset = prev.bm_offset; | |
1077 | md->md_size_sect = prev.md_size_sect; | |
1078 | md->al_stripes = prev.al_stripes; | |
1079 | md->al_stripe_size_4k = prev.al_stripe_size_4k; | |
1080 | md->al_size_4k = (u64)prev.al_stripes * prev.al_stripe_size_4k; | |
d752b269 | 1081 | } |
b30ab791 AG |
1082 | lc_unlock(device->act_log); |
1083 | wake_up(&device->al_wait); | |
1084 | drbd_md_put_buffer(device); | |
1085 | drbd_resume_io(device); | |
b411b363 PR |
1086 | |
1087 | return rv; | |
1088 | } | |
1089 | ||
1090 | sector_t | |
b30ab791 | 1091 | drbd_new_dev_size(struct drbd_device *device, struct drbd_backing_dev *bdev, |
ef5e44a6 | 1092 | sector_t u_size, int assume_peer_has_space) |
b411b363 | 1093 | { |
b30ab791 | 1094 | sector_t p_size = device->p_size; /* partner's disk size. */ |
cccac985 | 1095 | sector_t la_size_sect = bdev->md.la_size_sect; /* last agreed size. */ |
b411b363 | 1096 | sector_t m_size; /* my size */ |
b411b363 PR |
1097 | sector_t size = 0; |
1098 | ||
1099 | m_size = drbd_get_max_capacity(bdev); | |
1100 | ||
b30ab791 | 1101 | if (device->state.conn < C_CONNECTED && assume_peer_has_space) { |
d0180171 | 1102 | drbd_warn(device, "Resize while not connected was forced by the user!\n"); |
a393db6f PR |
1103 | p_size = m_size; |
1104 | } | |
1105 | ||
b411b363 PR |
1106 | if (p_size && m_size) { |
1107 | size = min_t(sector_t, p_size, m_size); | |
1108 | } else { | |
cccac985 LE |
1109 | if (la_size_sect) { |
1110 | size = la_size_sect; | |
b411b363 PR |
1111 | if (m_size && m_size < size) |
1112 | size = m_size; | |
1113 | if (p_size && p_size < size) | |
1114 | size = p_size; | |
1115 | } else { | |
1116 | if (m_size) | |
1117 | size = m_size; | |
1118 | if (p_size) | |
1119 | size = p_size; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | if (size == 0) | |
d0180171 | 1124 | drbd_err(device, "Both nodes diskless!\n"); |
b411b363 PR |
1125 | |
1126 | if (u_size) { | |
1127 | if (u_size > size) | |
d0180171 | 1128 | drbd_err(device, "Requested disk size is too big (%lu > %lu)\n", |
b411b363 PR |
1129 | (unsigned long)u_size>>1, (unsigned long)size>>1); |
1130 | else | |
1131 | size = u_size; | |
1132 | } | |
1133 | ||
1134 | return size; | |
1135 | } | |
1136 | ||
1137 | /** | |
1138 | * drbd_check_al_size() - Ensures that the AL is of the right size | |
b30ab791 | 1139 | * @device: DRBD device. |
b411b363 PR |
1140 | * |
1141 | * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation | |
1142 | * failed, and 0 on success. You should call drbd_md_sync() after you called | |
1143 | * this function. | |
1144 | */ | |
b30ab791 | 1145 | static int drbd_check_al_size(struct drbd_device *device, struct disk_conf *dc) |
b411b363 PR |
1146 | { |
1147 | struct lru_cache *n, *t; | |
1148 | struct lc_element *e; | |
1149 | unsigned int in_use; | |
1150 | int i; | |
1151 | ||
b30ab791 AG |
1152 | if (device->act_log && |
1153 | device->act_log->nr_elements == dc->al_extents) | |
b411b363 PR |
1154 | return 0; |
1155 | ||
1156 | in_use = 0; | |
b30ab791 | 1157 | t = device->act_log; |
7ad651b5 | 1158 | n = lc_create("act_log", drbd_al_ext_cache, AL_UPDATES_PER_TRANSACTION, |
f399002e | 1159 | dc->al_extents, sizeof(struct lc_element), 0); |
b411b363 PR |
1160 | |
1161 | if (n == NULL) { | |
d0180171 | 1162 | drbd_err(device, "Cannot allocate act_log lru!\n"); |
b411b363 PR |
1163 | return -ENOMEM; |
1164 | } | |
b30ab791 | 1165 | spin_lock_irq(&device->al_lock); |
b411b363 PR |
1166 | if (t) { |
1167 | for (i = 0; i < t->nr_elements; i++) { | |
1168 | e = lc_element_by_index(t, i); | |
1169 | if (e->refcnt) | |
d0180171 | 1170 | drbd_err(device, "refcnt(%d)==%d\n", |
b411b363 PR |
1171 | e->lc_number, e->refcnt); |
1172 | in_use += e->refcnt; | |
1173 | } | |
1174 | } | |
1175 | if (!in_use) | |
b30ab791 AG |
1176 | device->act_log = n; |
1177 | spin_unlock_irq(&device->al_lock); | |
b411b363 | 1178 | if (in_use) { |
d0180171 | 1179 | drbd_err(device, "Activity log still in use!\n"); |
b411b363 PR |
1180 | lc_destroy(n); |
1181 | return -EBUSY; | |
1182 | } else { | |
d01efcee | 1183 | lc_destroy(t); |
b411b363 | 1184 | } |
b30ab791 | 1185 | drbd_md_mark_dirty(device); /* we changed device->act_log->nr_elemens */ |
b411b363 PR |
1186 | return 0; |
1187 | } | |
1188 | ||
69ba1ee9 LE |
1189 | static void blk_queue_discard_granularity(struct request_queue *q, unsigned int granularity) |
1190 | { | |
1191 | q->limits.discard_granularity = granularity; | |
1192 | } | |
9104d31a LE |
1193 | |
1194 | static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection) | |
1195 | { | |
1196 | /* when we introduced REQ_WRITE_SAME support, we also bumped | |
1197 | * our maximum supported batch bio size used for discards. */ | |
1198 | if (connection->agreed_features & DRBD_FF_WSAME) | |
1199 | return DRBD_MAX_BBIO_SECTORS; | |
1200 | /* before, with DRBD <= 8.4.6, we only allowed up to one AL_EXTENT_SIZE. */ | |
1201 | return AL_EXTENT_SIZE >> 9; | |
1202 | } | |
1203 | ||
69ba1ee9 LE |
1204 | static void decide_on_discard_support(struct drbd_device *device, |
1205 | struct request_queue *q, | |
1206 | struct request_queue *b, | |
1207 | bool discard_zeroes_if_aligned) | |
1208 | { | |
1209 | /* q = drbd device queue (device->rq_queue) | |
1210 | * b = backing device queue (device->ldev->backing_bdev->bd_disk->queue), | |
1211 | * or NULL if diskless | |
1212 | */ | |
1213 | struct drbd_connection *connection = first_peer_device(device)->connection; | |
1214 | bool can_do = b ? blk_queue_discard(b) : true; | |
1215 | ||
9104d31a | 1216 | if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_TRIM)) { |
69ba1ee9 LE |
1217 | can_do = false; |
1218 | drbd_info(connection, "peer DRBD too old, does not support TRIM: disabling discards\n"); | |
1219 | } | |
1220 | if (can_do) { | |
1221 | /* We don't care for the granularity, really. | |
1222 | * Stacking limits below should fix it for the local | |
1223 | * device. Whether or not it is a suitable granularity | |
1224 | * on the remote device is not our problem, really. If | |
1225 | * you care, you need to use devices with similar | |
1226 | * topology on all peers. */ | |
1227 | blk_queue_discard_granularity(q, 512); | |
9104d31a | 1228 | q->limits.max_discard_sectors = drbd_max_discard_sectors(connection); |
8b904b5b | 1229 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); |
45c21793 | 1230 | q->limits.max_write_zeroes_sectors = drbd_max_discard_sectors(connection); |
69ba1ee9 | 1231 | } else { |
8b904b5b | 1232 | blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q); |
69ba1ee9 LE |
1233 | blk_queue_discard_granularity(q, 0); |
1234 | q->limits.max_discard_sectors = 0; | |
45c21793 | 1235 | q->limits.max_write_zeroes_sectors = 0; |
69ba1ee9 LE |
1236 | } |
1237 | } | |
1238 | ||
1239 | static void fixup_discard_if_not_supported(struct request_queue *q) | |
1240 | { | |
1241 | /* To avoid confusion, if this queue does not support discard, clear | |
1242 | * max_discard_sectors, which is what lsblk -D reports to the user. | |
1243 | * Older kernels got this wrong in "stack limits". | |
1244 | * */ | |
1245 | if (!blk_queue_discard(q)) { | |
1246 | blk_queue_max_discard_sectors(q, 0); | |
1247 | blk_queue_discard_granularity(q, 0); | |
1248 | } | |
1249 | } | |
1250 | ||
f31e583a LE |
1251 | static void fixup_write_zeroes(struct drbd_device *device, struct request_queue *q) |
1252 | { | |
1253 | /* Fixup max_write_zeroes_sectors after blk_queue_stack_limits(): | |
1254 | * if we can handle "zeroes" efficiently on the protocol, | |
1255 | * we want to do that, even if our backend does not announce | |
1256 | * max_write_zeroes_sectors itself. */ | |
1257 | struct drbd_connection *connection = first_peer_device(device)->connection; | |
1258 | /* If the peer announces WZEROES support, use it. Otherwise, rather | |
1259 | * send explicit zeroes than rely on some discard-zeroes-data magic. */ | |
1260 | if (connection->agreed_features & DRBD_FF_WZEROES) | |
1261 | q->limits.max_write_zeroes_sectors = DRBD_MAX_BBIO_SECTORS; | |
1262 | else | |
1263 | q->limits.max_write_zeroes_sectors = 0; | |
1264 | } | |
1265 | ||
9104d31a LE |
1266 | static void decide_on_write_same_support(struct drbd_device *device, |
1267 | struct request_queue *q, | |
9de7e14a LE |
1268 | struct request_queue *b, struct o_qlim *o, |
1269 | bool disable_write_same) | |
9104d31a LE |
1270 | { |
1271 | struct drbd_peer_device *peer_device = first_peer_device(device); | |
1272 | struct drbd_connection *connection = peer_device->connection; | |
1273 | bool can_do = b ? b->limits.max_write_same_sectors : true; | |
1274 | ||
9de7e14a LE |
1275 | if (can_do && disable_write_same) { |
1276 | can_do = false; | |
1277 | drbd_info(peer_device, "WRITE_SAME disabled by config\n"); | |
1278 | } | |
1279 | ||
9104d31a LE |
1280 | if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_WSAME)) { |
1281 | can_do = false; | |
1282 | drbd_info(peer_device, "peer does not support WRITE_SAME\n"); | |
1283 | } | |
1284 | ||
1285 | if (o) { | |
1286 | /* logical block size; queue_logical_block_size(NULL) is 512 */ | |
1287 | unsigned int peer_lbs = be32_to_cpu(o->logical_block_size); | |
1288 | unsigned int me_lbs_b = queue_logical_block_size(b); | |
1289 | unsigned int me_lbs = queue_logical_block_size(q); | |
1290 | ||
1291 | if (me_lbs_b != me_lbs) { | |
1292 | drbd_warn(device, | |
1293 | "logical block size of local backend does not match (drbd:%u, backend:%u); was this a late attach?\n", | |
1294 | me_lbs, me_lbs_b); | |
1295 | /* rather disable write same than trigger some BUG_ON later in the scsi layer. */ | |
1296 | can_do = false; | |
1297 | } | |
1298 | if (me_lbs_b != peer_lbs) { | |
1299 | drbd_warn(peer_device, "logical block sizes do not match (me:%u, peer:%u); this may cause problems.\n", | |
1300 | me_lbs, peer_lbs); | |
1301 | if (can_do) { | |
1302 | drbd_dbg(peer_device, "logical block size mismatch: WRITE_SAME disabled.\n"); | |
1303 | can_do = false; | |
1304 | } | |
1305 | me_lbs = max(me_lbs, me_lbs_b); | |
1306 | /* We cannot change the logical block size of an in-use queue. | |
1307 | * We can only hope that access happens to be properly aligned. | |
1308 | * If not, the peer will likely produce an IO error, and detach. */ | |
1309 | if (peer_lbs > me_lbs) { | |
1310 | if (device->state.role != R_PRIMARY) { | |
1311 | blk_queue_logical_block_size(q, peer_lbs); | |
1312 | drbd_warn(peer_device, "logical block size set to %u\n", peer_lbs); | |
1313 | } else { | |
1314 | drbd_warn(peer_device, | |
1315 | "current Primary must NOT adjust logical block size (%u -> %u); hope for the best.\n", | |
1316 | me_lbs, peer_lbs); | |
1317 | } | |
1318 | } | |
1319 | } | |
1320 | if (can_do && !o->write_same_capable) { | |
1321 | /* If we introduce an open-coded write-same loop on the receiving side, | |
1322 | * the peer would present itself as "capable". */ | |
1323 | drbd_dbg(peer_device, "WRITE_SAME disabled (peer device not capable)\n"); | |
1324 | can_do = false; | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | blk_queue_max_write_same_sectors(q, can_do ? DRBD_MAX_BBIO_SECTORS : 0); | |
1329 | } | |
1330 | ||
8fe39aac | 1331 | static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backing_dev *bdev, |
9104d31a | 1332 | unsigned int max_bio_size, struct o_qlim *o) |
b411b363 | 1333 | { |
b30ab791 | 1334 | struct request_queue * const q = device->rq_queue; |
db141b2f LE |
1335 | unsigned int max_hw_sectors = max_bio_size >> 9; |
1336 | unsigned int max_segments = 0; | |
c1b3156f | 1337 | struct request_queue *b = NULL; |
dd4f699d LE |
1338 | struct disk_conf *dc; |
1339 | bool discard_zeroes_if_aligned = true; | |
9de7e14a | 1340 | bool disable_write_same = false; |
99432fcc | 1341 | |
8fe39aac PR |
1342 | if (bdev) { |
1343 | b = bdev->backing_bdev->bd_disk->queue; | |
99432fcc PR |
1344 | |
1345 | max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9); | |
daeda1cc | 1346 | rcu_read_lock(); |
dd4f699d LE |
1347 | dc = rcu_dereference(device->ldev->disk_conf); |
1348 | max_segments = dc->max_bio_bvecs; | |
1349 | discard_zeroes_if_aligned = dc->discard_zeroes_if_aligned; | |
9de7e14a | 1350 | disable_write_same = dc->disable_write_same; |
daeda1cc | 1351 | rcu_read_unlock(); |
c1b3156f PR |
1352 | |
1353 | blk_set_stacking_limits(&q->limits); | |
99432fcc | 1354 | } |
b411b363 | 1355 | |
1816a2b4 LE |
1356 | blk_queue_max_hw_sectors(q, max_hw_sectors); |
1357 | /* This is the workaround for "bio would need to, but cannot, be split" */ | |
1358 | blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS); | |
09cbfeaf | 1359 | blk_queue_segment_boundary(q, PAGE_SIZE-1); |
69ba1ee9 | 1360 | decide_on_discard_support(device, q, b, discard_zeroes_if_aligned); |
9de7e14a | 1361 | decide_on_write_same_support(device, q, b, o, disable_write_same); |
9104d31a | 1362 | |
c1b3156f | 1363 | if (b) { |
99432fcc PR |
1364 | blk_queue_stack_limits(q, b); |
1365 | ||
dc3b17cc JK |
1366 | if (q->backing_dev_info->ra_pages != |
1367 | b->backing_dev_info->ra_pages) { | |
d0180171 | 1368 | drbd_info(device, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", |
dc3b17cc JK |
1369 | q->backing_dev_info->ra_pages, |
1370 | b->backing_dev_info->ra_pages); | |
1371 | q->backing_dev_info->ra_pages = | |
1372 | b->backing_dev_info->ra_pages; | |
99432fcc | 1373 | } |
99432fcc | 1374 | } |
69ba1ee9 | 1375 | fixup_discard_if_not_supported(q); |
f31e583a | 1376 | fixup_write_zeroes(device, q); |
99432fcc PR |
1377 | } |
1378 | ||
9104d31a | 1379 | void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev, struct o_qlim *o) |
99432fcc | 1380 | { |
db141b2f | 1381 | unsigned int now, new, local, peer; |
99432fcc | 1382 | |
b30ab791 AG |
1383 | now = queue_max_hw_sectors(device->rq_queue) << 9; |
1384 | local = device->local_max_bio_size; /* Eventually last known value, from volatile memory */ | |
1385 | peer = device->peer_max_bio_size; /* Eventually last known value, from meta data */ | |
b411b363 | 1386 | |
8fe39aac PR |
1387 | if (bdev) { |
1388 | local = queue_max_hw_sectors(bdev->backing_bdev->bd_disk->queue) << 9; | |
b30ab791 | 1389 | device->local_max_bio_size = local; |
b411b363 | 1390 | } |
db141b2f | 1391 | local = min(local, DRBD_MAX_BIO_SIZE); |
99432fcc PR |
1392 | |
1393 | /* We may ignore peer limits if the peer is modern enough. | |
1394 | Because new from 8.3.8 onwards the peer can use multiple | |
1395 | BIOs for a single peer_request */ | |
b30ab791 | 1396 | if (device->state.conn >= C_WF_REPORT_PARAMS) { |
a6b32bc3 | 1397 | if (first_peer_device(device)->connection->agreed_pro_version < 94) |
b30ab791 | 1398 | peer = min(device->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET); |
6809384c | 1399 | /* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */ |
a6b32bc3 | 1400 | else if (first_peer_device(device)->connection->agreed_pro_version == 94) |
99432fcc | 1401 | peer = DRBD_MAX_SIZE_H80_PACKET; |
a6b32bc3 | 1402 | else if (first_peer_device(device)->connection->agreed_pro_version < 100) |
2ffca4f3 PR |
1403 | peer = DRBD_MAX_BIO_SIZE_P95; /* drbd 8.3.8 onwards, before 8.4.0 */ |
1404 | else | |
99432fcc | 1405 | peer = DRBD_MAX_BIO_SIZE; |
99432fcc | 1406 | |
fa090e70 LE |
1407 | /* We may later detach and re-attach on a disconnected Primary. |
1408 | * Avoid this setting to jump back in that case. | |
1409 | * We want to store what we know the peer DRBD can handle, | |
1410 | * not what the peer IO backend can handle. */ | |
1411 | if (peer > device->peer_max_bio_size) | |
1412 | device->peer_max_bio_size = peer; | |
1413 | } | |
db141b2f | 1414 | new = min(local, peer); |
99432fcc | 1415 | |
b30ab791 | 1416 | if (device->state.role == R_PRIMARY && new < now) |
d0180171 | 1417 | drbd_err(device, "ASSERT FAILED new < now; (%u < %u)\n", new, now); |
99432fcc PR |
1418 | |
1419 | if (new != now) | |
d0180171 | 1420 | drbd_info(device, "max BIO size = %u\n", new); |
99432fcc | 1421 | |
9104d31a | 1422 | drbd_setup_queue_param(device, bdev, new, o); |
b411b363 PR |
1423 | } |
1424 | ||
a18e9d1e | 1425 | /* Starts the worker thread */ |
bde89a9e | 1426 | static void conn_reconfig_start(struct drbd_connection *connection) |
b411b363 | 1427 | { |
bde89a9e | 1428 | drbd_thread_start(&connection->worker); |
b5043c5e | 1429 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 PR |
1430 | } |
1431 | ||
a18e9d1e | 1432 | /* if still unconfigured, stops worker again. */ |
bde89a9e | 1433 | static void conn_reconfig_done(struct drbd_connection *connection) |
b411b363 | 1434 | { |
992d6e91 | 1435 | bool stop_threads; |
0500813f | 1436 | spin_lock_irq(&connection->resource->req_lock); |
bde89a9e AG |
1437 | stop_threads = conn_all_vols_unconf(connection) && |
1438 | connection->cstate == C_STANDALONE; | |
0500813f | 1439 | spin_unlock_irq(&connection->resource->req_lock); |
992d6e91 | 1440 | if (stop_threads) { |
668700b4 PR |
1441 | /* ack_receiver thread and ack_sender workqueue are implicitly |
1442 | * stopped by receiver in conn_disconnect() */ | |
bde89a9e AG |
1443 | drbd_thread_stop(&connection->receiver); |
1444 | drbd_thread_stop(&connection->worker); | |
992d6e91 | 1445 | } |
b411b363 PR |
1446 | } |
1447 | ||
0778286a | 1448 | /* Make sure IO is suspended before calling this function(). */ |
b30ab791 | 1449 | static void drbd_suspend_al(struct drbd_device *device) |
0778286a PR |
1450 | { |
1451 | int s = 0; | |
1452 | ||
b30ab791 | 1453 | if (!lc_try_lock(device->act_log)) { |
d0180171 | 1454 | drbd_warn(device, "Failed to lock al in drbd_suspend_al()\n"); |
0778286a PR |
1455 | return; |
1456 | } | |
1457 | ||
b30ab791 | 1458 | drbd_al_shrink(device); |
0500813f | 1459 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 AG |
1460 | if (device->state.conn < C_CONNECTED) |
1461 | s = !test_and_set_bit(AL_SUSPENDED, &device->flags); | |
0500813f | 1462 | spin_unlock_irq(&device->resource->req_lock); |
b30ab791 | 1463 | lc_unlock(device->act_log); |
0778286a PR |
1464 | |
1465 | if (s) | |
d0180171 | 1466 | drbd_info(device, "Suspended AL updates\n"); |
0778286a PR |
1467 | } |
1468 | ||
5979e361 LE |
1469 | |
1470 | static bool should_set_defaults(struct genl_info *info) | |
1471 | { | |
1472 | unsigned flags = ((struct drbd_genlmsghdr*)info->userhdr)->flags; | |
1473 | return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS); | |
1474 | } | |
1475 | ||
5bbcf5e6 | 1476 | static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev) |
d589a21e | 1477 | { |
5bbcf5e6 LE |
1478 | /* This is limited by 16 bit "slot" numbers, |
1479 | * and by available on-disk context storage. | |
1480 | * | |
1481 | * Also (u16)~0 is special (denotes a "free" extent). | |
1482 | * | |
1483 | * One transaction occupies one 4kB on-disk block, | |
1484 | * we have n such blocks in the on disk ring buffer, | |
1485 | * the "current" transaction may fail (n-1), | |
1486 | * and there is 919 slot numbers context information per transaction. | |
1487 | * | |
1488 | * 72 transaction blocks amounts to more than 2**16 context slots, | |
1489 | * so cap there first. | |
1490 | */ | |
1491 | const unsigned int max_al_nr = DRBD_AL_EXTENTS_MAX; | |
1492 | const unsigned int sufficient_on_disk = | |
1493 | (max_al_nr + AL_CONTEXT_PER_TRANSACTION -1) | |
1494 | /AL_CONTEXT_PER_TRANSACTION; | |
d589a21e | 1495 | |
5bbcf5e6 LE |
1496 | unsigned int al_size_4k = bdev->md.al_size_4k; |
1497 | ||
1498 | if (al_size_4k > sufficient_on_disk) | |
1499 | return max_al_nr; | |
1500 | ||
1501 | return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION; | |
d589a21e PR |
1502 | } |
1503 | ||
70df7092 LE |
1504 | static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b) |
1505 | { | |
1506 | return a->disk_barrier != b->disk_barrier || | |
1507 | a->disk_flushes != b->disk_flushes || | |
1508 | a->disk_drain != b->disk_drain; | |
1509 | } | |
1510 | ||
a5ca66c4 PR |
1511 | static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *disk_conf, |
1512 | struct drbd_backing_dev *nbc) | |
c5c23854 | 1513 | { |
a5ca66c4 PR |
1514 | struct request_queue * const q = nbc->backing_bdev->bd_disk->queue; |
1515 | ||
c5c23854 PR |
1516 | if (disk_conf->al_extents < DRBD_AL_EXTENTS_MIN) |
1517 | disk_conf->al_extents = DRBD_AL_EXTENTS_MIN; | |
1518 | if (disk_conf->al_extents > drbd_al_extents_max(nbc)) | |
1519 | disk_conf->al_extents = drbd_al_extents_max(nbc); | |
a5ca66c4 | 1520 | |
48920ff2 | 1521 | if (!blk_queue_discard(q)) { |
65f5be35 LE |
1522 | if (disk_conf->rs_discard_granularity) { |
1523 | disk_conf->rs_discard_granularity = 0; /* disable feature */ | |
1524 | drbd_info(device, "rs_discard_granularity feature disabled\n"); | |
1525 | } | |
a5ca66c4 PR |
1526 | } |
1527 | ||
1528 | if (disk_conf->rs_discard_granularity) { | |
1529 | int orig_value = disk_conf->rs_discard_granularity; | |
1530 | int remainder; | |
1531 | ||
1532 | if (q->limits.discard_granularity > disk_conf->rs_discard_granularity) | |
1533 | disk_conf->rs_discard_granularity = q->limits.discard_granularity; | |
1534 | ||
1535 | remainder = disk_conf->rs_discard_granularity % q->limits.discard_granularity; | |
1536 | disk_conf->rs_discard_granularity += remainder; | |
1537 | ||
1538 | if (disk_conf->rs_discard_granularity > q->limits.max_discard_sectors << 9) | |
1539 | disk_conf->rs_discard_granularity = q->limits.max_discard_sectors << 9; | |
1540 | ||
1541 | if (disk_conf->rs_discard_granularity != orig_value) | |
1542 | drbd_info(device, "rs_discard_granularity changed to %d\n", | |
1543 | disk_conf->rs_discard_granularity); | |
1544 | } | |
c5c23854 PR |
1545 | } |
1546 | ||
f708bd08 LE |
1547 | static int disk_opts_check_al_size(struct drbd_device *device, struct disk_conf *dc) |
1548 | { | |
1549 | int err = -EBUSY; | |
1550 | ||
1551 | if (device->act_log && | |
1552 | device->act_log->nr_elements == dc->al_extents) | |
1553 | return 0; | |
1554 | ||
1555 | drbd_suspend_io(device); | |
1556 | /* If IO completion is currently blocked, we would likely wait | |
1557 | * "forever" for the activity log to become unused. So we don't. */ | |
1558 | if (atomic_read(&device->ap_bio_cnt)) | |
1559 | goto out; | |
1560 | ||
1561 | wait_event(device->al_wait, lc_try_lock(device->act_log)); | |
1562 | drbd_al_shrink(device); | |
1563 | err = drbd_check_al_size(device, dc); | |
1564 | lc_unlock(device->act_log); | |
1565 | wake_up(&device->al_wait); | |
1566 | out: | |
1567 | drbd_resume_io(device); | |
1568 | return err; | |
1569 | } | |
1570 | ||
f399002e LE |
1571 | int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) |
1572 | { | |
a910b123 | 1573 | struct drbd_config_context adm_ctx; |
f399002e | 1574 | enum drbd_ret_code retcode; |
b30ab791 | 1575 | struct drbd_device *device; |
daeda1cc | 1576 | struct disk_conf *new_disk_conf, *old_disk_conf; |
813472ce | 1577 | struct fifo_buffer *old_plan = NULL, *new_plan = NULL; |
f399002e | 1578 | int err, fifo_size; |
f399002e | 1579 | |
a910b123 | 1580 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
f399002e LE |
1581 | if (!adm_ctx.reply_skb) |
1582 | return retcode; | |
1583 | if (retcode != NO_ERROR) | |
9e276872 | 1584 | goto finish; |
f399002e | 1585 | |
b30ab791 | 1586 | device = adm_ctx.device; |
9e276872 | 1587 | mutex_lock(&adm_ctx.resource->adm_mutex); |
f399002e LE |
1588 | |
1589 | /* we also need a disk | |
1590 | * to change the options on */ | |
b30ab791 | 1591 | if (!get_ldev(device)) { |
f399002e LE |
1592 | retcode = ERR_NO_DISK; |
1593 | goto out; | |
1594 | } | |
1595 | ||
daeda1cc | 1596 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); |
5ecc72c3 | 1597 | if (!new_disk_conf) { |
f399002e LE |
1598 | retcode = ERR_NOMEM; |
1599 | goto fail; | |
1600 | } | |
1601 | ||
0500813f | 1602 | mutex_lock(&device->resource->conf_update); |
b30ab791 | 1603 | old_disk_conf = device->ldev->disk_conf; |
daeda1cc | 1604 | *new_disk_conf = *old_disk_conf; |
5979e361 | 1605 | if (should_set_defaults(info)) |
b966b5dd | 1606 | set_disk_conf_defaults(new_disk_conf); |
5979e361 | 1607 | |
5ecc72c3 | 1608 | err = disk_conf_from_attrs_for_change(new_disk_conf, info); |
c75b9b10 | 1609 | if (err && err != -ENOMSG) { |
f399002e | 1610 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 1611 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
8e229434 | 1612 | goto fail_unlock; |
f399002e LE |
1613 | } |
1614 | ||
5ecc72c3 LE |
1615 | if (!expect(new_disk_conf->resync_rate >= 1)) |
1616 | new_disk_conf->resync_rate = 1; | |
f399002e | 1617 | |
a5ca66c4 | 1618 | sanitize_disk_conf(device, new_disk_conf, device->ldev); |
5bbcf5e6 LE |
1619 | |
1620 | if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) | |
1621 | new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
f399002e | 1622 | |
5ecc72c3 | 1623 | fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ; |
b30ab791 | 1624 | if (fifo_size != device->rs_plan_s->size) { |
813472ce PR |
1625 | new_plan = fifo_alloc(fifo_size); |
1626 | if (!new_plan) { | |
d0180171 | 1627 | drbd_err(device, "kmalloc of fifo_buffer failed"); |
f399002e | 1628 | retcode = ERR_NOMEM; |
daeda1cc | 1629 | goto fail_unlock; |
f399002e LE |
1630 | } |
1631 | } | |
1632 | ||
f708bd08 | 1633 | err = disk_opts_check_al_size(device, new_disk_conf); |
f399002e | 1634 | if (err) { |
f708bd08 LE |
1635 | /* Could be just "busy". Ignore? |
1636 | * Introduce dedicated error code? */ | |
1637 | drbd_msg_put_info(adm_ctx.reply_skb, | |
1638 | "Try again without changing current al-extents setting"); | |
f399002e | 1639 | retcode = ERR_NOMEM; |
daeda1cc | 1640 | goto fail_unlock; |
f399002e LE |
1641 | } |
1642 | ||
28bc3b8c | 1643 | lock_all_resources(); |
b30ab791 | 1644 | retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after); |
dc97b708 | 1645 | if (retcode == NO_ERROR) { |
b30ab791 AG |
1646 | rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); |
1647 | drbd_resync_after_changed(device); | |
dc97b708 | 1648 | } |
28bc3b8c | 1649 | unlock_all_resources(); |
f399002e | 1650 | |
daeda1cc PR |
1651 | if (retcode != NO_ERROR) |
1652 | goto fail_unlock; | |
f399002e | 1653 | |
813472ce | 1654 | if (new_plan) { |
b30ab791 AG |
1655 | old_plan = device->rs_plan_s; |
1656 | rcu_assign_pointer(device->rs_plan_s, new_plan); | |
9958c857 | 1657 | } |
9958c857 | 1658 | |
0500813f | 1659 | mutex_unlock(&device->resource->conf_update); |
27eb13e9 | 1660 | |
9a51ab1c | 1661 | if (new_disk_conf->al_updates) |
b30ab791 | 1662 | device->ldev->md.flags &= ~MDF_AL_DISABLED; |
9a51ab1c | 1663 | else |
b30ab791 | 1664 | device->ldev->md.flags |= MDF_AL_DISABLED; |
9a51ab1c | 1665 | |
691631c0 | 1666 | if (new_disk_conf->md_flushes) |
b30ab791 | 1667 | clear_bit(MD_NO_FUA, &device->flags); |
691631c0 | 1668 | else |
b30ab791 | 1669 | set_bit(MD_NO_FUA, &device->flags); |
691631c0 | 1670 | |
70df7092 | 1671 | if (write_ordering_changed(old_disk_conf, new_disk_conf)) |
f6ba8636 | 1672 | drbd_bump_write_ordering(device->resource, NULL, WO_BDEV_FLUSH); |
27eb13e9 | 1673 | |
9de7e14a LE |
1674 | if (old_disk_conf->discard_zeroes_if_aligned != new_disk_conf->discard_zeroes_if_aligned |
1675 | || old_disk_conf->disable_write_same != new_disk_conf->disable_write_same) | |
9104d31a | 1676 | drbd_reconsider_queue_parameters(device, device->ldev, NULL); |
dd4f699d | 1677 | |
b30ab791 | 1678 | drbd_md_sync(device); |
f399002e | 1679 | |
69a22773 AG |
1680 | if (device->state.conn >= C_CONNECTED) { |
1681 | struct drbd_peer_device *peer_device; | |
1682 | ||
1683 | for_each_peer_device(peer_device, device) | |
1684 | drbd_send_sync_param(peer_device); | |
1685 | } | |
f399002e | 1686 | |
daeda1cc PR |
1687 | synchronize_rcu(); |
1688 | kfree(old_disk_conf); | |
813472ce | 1689 | kfree(old_plan); |
b30ab791 | 1690 | mod_timer(&device->request_timer, jiffies + HZ); |
daeda1cc PR |
1691 | goto success; |
1692 | ||
1693 | fail_unlock: | |
0500813f | 1694 | mutex_unlock(&device->resource->conf_update); |
f399002e | 1695 | fail: |
5ecc72c3 | 1696 | kfree(new_disk_conf); |
813472ce | 1697 | kfree(new_plan); |
daeda1cc | 1698 | success: |
b30ab791 | 1699 | put_ldev(device); |
f399002e | 1700 | out: |
9e276872 LE |
1701 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
1702 | finish: | |
a910b123 | 1703 | drbd_adm_finish(&adm_ctx, info, retcode); |
f399002e LE |
1704 | return 0; |
1705 | } | |
1706 | ||
63a7c8ad LE |
1707 | static struct block_device *open_backing_dev(struct drbd_device *device, |
1708 | const char *bdev_path, void *claim_ptr, bool do_bd_link) | |
1709 | { | |
1710 | struct block_device *bdev; | |
1711 | int err = 0; | |
1712 | ||
1713 | bdev = blkdev_get_by_path(bdev_path, | |
1714 | FMODE_READ | FMODE_WRITE | FMODE_EXCL, claim_ptr); | |
1715 | if (IS_ERR(bdev)) { | |
1716 | drbd_err(device, "open(\"%s\") failed with %ld\n", | |
1717 | bdev_path, PTR_ERR(bdev)); | |
1718 | return bdev; | |
1719 | } | |
1720 | ||
1721 | if (!do_bd_link) | |
1722 | return bdev; | |
1723 | ||
1724 | err = bd_link_disk_holder(bdev, device->vdisk); | |
1725 | if (err) { | |
1726 | blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1727 | drbd_err(device, "bd_link_disk_holder(\"%s\", ...) failed with %d\n", | |
1728 | bdev_path, err); | |
1729 | bdev = ERR_PTR(err); | |
1730 | } | |
1731 | return bdev; | |
1732 | } | |
1733 | ||
1734 | static int open_backing_devices(struct drbd_device *device, | |
1735 | struct disk_conf *new_disk_conf, | |
1736 | struct drbd_backing_dev *nbc) | |
1737 | { | |
1738 | struct block_device *bdev; | |
1739 | ||
1740 | bdev = open_backing_dev(device, new_disk_conf->backing_dev, device, true); | |
1741 | if (IS_ERR(bdev)) | |
1742 | return ERR_OPEN_DISK; | |
1743 | nbc->backing_bdev = bdev; | |
1744 | ||
1745 | /* | |
1746 | * meta_dev_idx >= 0: external fixed size, possibly multiple | |
1747 | * drbd sharing one meta device. TODO in that case, paranoia | |
1748 | * check that [md_bdev, meta_dev_idx] is not yet used by some | |
1749 | * other drbd minor! (if you use drbd.conf + drbdadm, that | |
1750 | * should check it for you already; but if you don't, or | |
1751 | * someone fooled it, we need to double check here) | |
1752 | */ | |
1753 | bdev = open_backing_dev(device, new_disk_conf->meta_dev, | |
1754 | /* claim ptr: device, if claimed exclusively; shared drbd_m_holder, | |
1755 | * if potentially shared with other drbd minors */ | |
1756 | (new_disk_conf->meta_dev_idx < 0) ? (void*)device : (void*)drbd_m_holder, | |
1757 | /* avoid double bd_claim_by_disk() for the same (source,target) tuple, | |
1758 | * as would happen with internal metadata. */ | |
1759 | (new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_FLEX_INT && | |
1760 | new_disk_conf->meta_dev_idx != DRBD_MD_INDEX_INTERNAL)); | |
1761 | if (IS_ERR(bdev)) | |
1762 | return ERR_OPEN_MD_DISK; | |
1763 | nbc->md_bdev = bdev; | |
1764 | return NO_ERROR; | |
1765 | } | |
1766 | ||
1767 | static void close_backing_dev(struct drbd_device *device, struct block_device *bdev, | |
1768 | bool do_bd_unlink) | |
1769 | { | |
1770 | if (!bdev) | |
1771 | return; | |
1772 | if (do_bd_unlink) | |
1773 | bd_unlink_disk_holder(bdev, device->vdisk); | |
1774 | blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); | |
1775 | } | |
1776 | ||
1777 | void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev) | |
1778 | { | |
1779 | if (ldev == NULL) | |
1780 | return; | |
1781 | ||
1782 | close_backing_dev(device, ldev->md_bdev, ldev->md_bdev != ldev->backing_bdev); | |
1783 | close_backing_dev(device, ldev->backing_bdev, true); | |
1784 | ||
1785 | kfree(ldev->disk_conf); | |
1786 | kfree(ldev); | |
1787 | } | |
1788 | ||
3b98c0c2 | 1789 | int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 1790 | { |
a910b123 | 1791 | struct drbd_config_context adm_ctx; |
b30ab791 | 1792 | struct drbd_device *device; |
44a4d551 LE |
1793 | struct drbd_peer_device *peer_device; |
1794 | struct drbd_connection *connection; | |
3b98c0c2 | 1795 | int err; |
116676ca | 1796 | enum drbd_ret_code retcode; |
b411b363 PR |
1797 | enum determine_dev_size dd; |
1798 | sector_t max_possible_sectors; | |
1799 | sector_t min_md_device_sectors; | |
1800 | struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */ | |
daeda1cc | 1801 | struct disk_conf *new_disk_conf = NULL; |
b411b363 | 1802 | struct lru_cache *resync_lru = NULL; |
9958c857 | 1803 | struct fifo_buffer *new_plan = NULL; |
b411b363 | 1804 | union drbd_state ns, os; |
f2024e7c | 1805 | enum drbd_state_rv rv; |
44ed167d | 1806 | struct net_conf *nc; |
b411b363 | 1807 | |
a910b123 | 1808 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
1809 | if (!adm_ctx.reply_skb) |
1810 | return retcode; | |
1811 | if (retcode != NO_ERROR) | |
40cbf085 | 1812 | goto finish; |
b411b363 | 1813 | |
b30ab791 | 1814 | device = adm_ctx.device; |
9e276872 | 1815 | mutex_lock(&adm_ctx.resource->adm_mutex); |
44a4d551 | 1816 | peer_device = first_peer_device(device); |
3b8a44f8 | 1817 | connection = peer_device->connection; |
44a4d551 | 1818 | conn_reconfig_start(connection); |
b411b363 PR |
1819 | |
1820 | /* if you want to reconfigure, please tear down first */ | |
b30ab791 | 1821 | if (device->state.disk > D_DISKLESS) { |
b411b363 PR |
1822 | retcode = ERR_DISK_CONFIGURED; |
1823 | goto fail; | |
1824 | } | |
82f59cc6 LE |
1825 | /* It may just now have detached because of IO error. Make sure |
1826 | * drbd_ldev_destroy is done already, we may end up here very fast, | |
1827 | * e.g. if someone calls attach from the on-io-error handler, | |
1828 | * to realize a "hot spare" feature (not that I'd recommend that) */ | |
e334f550 | 1829 | wait_event(device->misc_wait, !test_bit(GOING_DISKLESS, &device->flags)); |
b411b363 | 1830 | |
383606e0 | 1831 | /* make sure there is no leftover from previous force-detach attempts */ |
b30ab791 AG |
1832 | clear_bit(FORCE_DETACH, &device->flags); |
1833 | clear_bit(WAS_IO_ERROR, &device->flags); | |
1834 | clear_bit(WAS_READ_ERROR, &device->flags); | |
383606e0 | 1835 | |
0029d624 | 1836 | /* and no leftover from previously aborted resync or verify, either */ |
b30ab791 AG |
1837 | device->rs_total = 0; |
1838 | device->rs_failed = 0; | |
1839 | atomic_set(&device->rs_pending_cnt, 0); | |
0029d624 | 1840 | |
3b98c0c2 | 1841 | /* allocation not in the IO path, drbdsetup context */ |
b411b363 PR |
1842 | nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); |
1843 | if (!nbc) { | |
1844 | retcode = ERR_NOMEM; | |
1845 | goto fail; | |
1846 | } | |
9f2247bb PR |
1847 | spin_lock_init(&nbc->md.uuid_lock); |
1848 | ||
daeda1cc PR |
1849 | new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL); |
1850 | if (!new_disk_conf) { | |
1851 | retcode = ERR_NOMEM; | |
b411b363 PR |
1852 | goto fail; |
1853 | } | |
daeda1cc | 1854 | nbc->disk_conf = new_disk_conf; |
b411b363 | 1855 | |
daeda1cc PR |
1856 | set_disk_conf_defaults(new_disk_conf); |
1857 | err = disk_conf_from_attrs(new_disk_conf, info); | |
3b98c0c2 | 1858 | if (err) { |
b411b363 | 1859 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 1860 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
1861 | goto fail; |
1862 | } | |
1863 | ||
5bbcf5e6 LE |
1864 | if (new_disk_conf->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX) |
1865 | new_disk_conf->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX; | |
d589a21e | 1866 | |
9958c857 PR |
1867 | new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ); |
1868 | if (!new_plan) { | |
1869 | retcode = ERR_NOMEM; | |
1870 | goto fail; | |
1871 | } | |
1872 | ||
daeda1cc | 1873 | if (new_disk_conf->meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { |
b411b363 PR |
1874 | retcode = ERR_MD_IDX_INVALID; |
1875 | goto fail; | |
1876 | } | |
1877 | ||
44ed167d | 1878 | rcu_read_lock(); |
44a4d551 | 1879 | nc = rcu_dereference(connection->net_conf); |
44ed167d | 1880 | if (nc) { |
daeda1cc | 1881 | if (new_disk_conf->fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) { |
44ed167d | 1882 | rcu_read_unlock(); |
47ff2d0a | 1883 | retcode = ERR_STONITH_AND_PROT_A; |
28bc3b8c | 1884 | goto fail; |
47ff2d0a PR |
1885 | } |
1886 | } | |
44ed167d | 1887 | rcu_read_unlock(); |
47ff2d0a | 1888 | |
63a7c8ad LE |
1889 | retcode = open_backing_devices(device, new_disk_conf, nbc); |
1890 | if (retcode != NO_ERROR) | |
28bc3b8c | 1891 | goto fail; |
b411b363 | 1892 | |
e525fd89 | 1893 | if ((nbc->backing_bdev == nbc->md_bdev) != |
daeda1cc PR |
1894 | (new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_INTERNAL || |
1895 | new_disk_conf->meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) { | |
e525fd89 | 1896 | retcode = ERR_MD_IDX_INVALID; |
28bc3b8c | 1897 | goto fail; |
b411b363 PR |
1898 | } |
1899 | ||
1900 | resync_lru = lc_create("resync", drbd_bm_ext_cache, | |
46a15bc3 | 1901 | 1, 61, sizeof(struct bm_extent), |
b411b363 PR |
1902 | offsetof(struct bm_extent, lce)); |
1903 | if (!resync_lru) { | |
1904 | retcode = ERR_NOMEM; | |
28bc3b8c | 1905 | goto fail; |
b411b363 PR |
1906 | } |
1907 | ||
c04ccaa6 LE |
1908 | /* Read our meta data super block early. |
1909 | * This also sets other on-disk offsets. */ | |
b30ab791 | 1910 | retcode = drbd_md_read(device, nbc); |
c04ccaa6 | 1911 | if (retcode != NO_ERROR) |
28bc3b8c | 1912 | goto fail; |
b411b363 | 1913 | |
a5ca66c4 | 1914 | sanitize_disk_conf(device, new_disk_conf, nbc); |
5bbcf5e6 | 1915 | |
daeda1cc | 1916 | if (drbd_get_max_capacity(nbc) < new_disk_conf->disk_size) { |
d0180171 | 1917 | drbd_err(device, "max capacity %llu smaller than disk size %llu\n", |
b411b363 | 1918 | (unsigned long long) drbd_get_max_capacity(nbc), |
daeda1cc | 1919 | (unsigned long long) new_disk_conf->disk_size); |
7948bcdc | 1920 | retcode = ERR_DISK_TOO_SMALL; |
28bc3b8c | 1921 | goto fail; |
b411b363 PR |
1922 | } |
1923 | ||
daeda1cc | 1924 | if (new_disk_conf->meta_dev_idx < 0) { |
b411b363 PR |
1925 | max_possible_sectors = DRBD_MAX_SECTORS_FLEX; |
1926 | /* at least one MB, otherwise it does not make sense */ | |
1927 | min_md_device_sectors = (2<<10); | |
1928 | } else { | |
1929 | max_possible_sectors = DRBD_MAX_SECTORS; | |
ae8bf312 | 1930 | min_md_device_sectors = MD_128MB_SECT * (new_disk_conf->meta_dev_idx + 1); |
b411b363 PR |
1931 | } |
1932 | ||
b411b363 | 1933 | if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) { |
7948bcdc | 1934 | retcode = ERR_MD_DISK_TOO_SMALL; |
d0180171 | 1935 | drbd_warn(device, "refusing attach: md-device too small, " |
b411b363 PR |
1936 | "at least %llu sectors needed for this meta-disk type\n", |
1937 | (unsigned long long) min_md_device_sectors); | |
28bc3b8c | 1938 | goto fail; |
b411b363 PR |
1939 | } |
1940 | ||
1941 | /* Make sure the new disk is big enough | |
1942 | * (we may currently be R_PRIMARY with no local disk...) */ | |
1943 | if (drbd_get_max_capacity(nbc) < | |
b30ab791 | 1944 | drbd_get_capacity(device->this_bdev)) { |
7948bcdc | 1945 | retcode = ERR_DISK_TOO_SMALL; |
28bc3b8c | 1946 | goto fail; |
b411b363 PR |
1947 | } |
1948 | ||
1949 | nbc->known_size = drbd_get_capacity(nbc->backing_bdev); | |
1950 | ||
1352994b | 1951 | if (nbc->known_size > max_possible_sectors) { |
d0180171 | 1952 | drbd_warn(device, "==> truncating very big lower level device " |
1352994b LE |
1953 | "to currently maximum possible %llu sectors <==\n", |
1954 | (unsigned long long) max_possible_sectors); | |
daeda1cc | 1955 | if (new_disk_conf->meta_dev_idx >= 0) |
d0180171 | 1956 | drbd_warn(device, "==>> using internal or flexible " |
1352994b LE |
1957 | "meta data may help <<==\n"); |
1958 | } | |
1959 | ||
b30ab791 | 1960 | drbd_suspend_io(device); |
b411b363 | 1961 | /* also wait for the last barrier ack. */ |
b6dd1a89 LE |
1962 | /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171 |
1963 | * We need a way to either ignore barrier acks for barriers sent before a device | |
1964 | * was attached, or a way to wait for all pending barrier acks to come in. | |
1965 | * As barriers are counted per resource, | |
1966 | * we'd need to suspend io on all devices of a resource. | |
1967 | */ | |
b30ab791 | 1968 | wait_event(device->misc_wait, !atomic_read(&device->ap_pending_cnt) || drbd_suspended(device)); |
b411b363 | 1969 | /* and for any other previously queued work */ |
44a4d551 | 1970 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 | 1971 | |
b30ab791 | 1972 | rv = _drbd_request_state(device, NS(disk, D_ATTACHING), CS_VERBOSE); |
f2024e7c | 1973 | retcode = rv; /* FIXME: Type mismatch. */ |
b30ab791 | 1974 | drbd_resume_io(device); |
f2024e7c | 1975 | if (rv < SS_SUCCESS) |
28bc3b8c | 1976 | goto fail; |
b411b363 | 1977 | |
b30ab791 | 1978 | if (!get_ldev_if_state(device, D_ATTACHING)) |
b411b363 PR |
1979 | goto force_diskless; |
1980 | ||
b30ab791 AG |
1981 | if (!device->bitmap) { |
1982 | if (drbd_bm_init(device)) { | |
b411b363 PR |
1983 | retcode = ERR_NOMEM; |
1984 | goto force_diskless_dec; | |
1985 | } | |
1986 | } | |
1987 | ||
fe43ed97 LE |
1988 | if (device->state.pdsk != D_UP_TO_DATE && device->ed_uuid && |
1989 | (device->state.role == R_PRIMARY || device->state.peer == R_PRIMARY) && | |
1990 | (device->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) { | |
d0180171 | 1991 | drbd_err(device, "Can only attach to data with current UUID=%016llX\n", |
b30ab791 | 1992 | (unsigned long long)device->ed_uuid); |
b411b363 PR |
1993 | retcode = ERR_DATA_NOT_CURRENT; |
1994 | goto force_diskless_dec; | |
1995 | } | |
1996 | ||
1997 | /* Since we are diskless, fix the activity log first... */ | |
b30ab791 | 1998 | if (drbd_check_al_size(device, new_disk_conf)) { |
b411b363 PR |
1999 | retcode = ERR_NOMEM; |
2000 | goto force_diskless_dec; | |
2001 | } | |
2002 | ||
2003 | /* Prevent shrinking of consistent devices ! */ | |
4ef2a4f4 LE |
2004 | { |
2005 | unsigned long long nsz = drbd_new_dev_size(device, nbc, nbc->disk_conf->disk_size, 0); | |
2006 | unsigned long long eff = nbc->md.la_size_sect; | |
2007 | if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && nsz < eff) { | |
2008 | if (nsz == nbc->disk_conf->disk_size) { | |
2009 | drbd_warn(device, "truncating a consistent device during attach (%llu < %llu)\n", nsz, eff); | |
2010 | } else { | |
2011 | drbd_warn(device, "refusing to truncate a consistent device (%llu < %llu)\n", nsz, eff); | |
2012 | drbd_msg_sprintf_info(adm_ctx.reply_skb, | |
2013 | "To-be-attached device has last effective > current size, and is consistent\n" | |
2014 | "(%llu > %llu sectors). Refusing to attach.", eff, nsz); | |
2015 | retcode = ERR_IMPLICIT_SHRINK; | |
2016 | goto force_diskless_dec; | |
2017 | } | |
2018 | } | |
b411b363 PR |
2019 | } |
2020 | ||
28bc3b8c AG |
2021 | lock_all_resources(); |
2022 | retcode = drbd_resync_after_valid(device, new_disk_conf->resync_after); | |
2023 | if (retcode != NO_ERROR) { | |
2024 | unlock_all_resources(); | |
2025 | goto force_diskless_dec; | |
2026 | } | |
2027 | ||
b411b363 PR |
2028 | /* Reset the "barriers don't work" bits here, then force meta data to |
2029 | * be written, to ensure we determine if barriers are supported. */ | |
e544046a | 2030 | if (new_disk_conf->md_flushes) |
b30ab791 | 2031 | clear_bit(MD_NO_FUA, &device->flags); |
b411b363 | 2032 | else |
b30ab791 | 2033 | set_bit(MD_NO_FUA, &device->flags); |
b411b363 PR |
2034 | |
2035 | /* Point of no return reached. | |
2036 | * Devices and memory are no longer released by error cleanup below. | |
b30ab791 | 2037 | * now device takes over responsibility, and the state engine should |
b411b363 | 2038 | * clean it up somewhere. */ |
0b0ba1ef | 2039 | D_ASSERT(device, device->ldev == NULL); |
b30ab791 AG |
2040 | device->ldev = nbc; |
2041 | device->resync = resync_lru; | |
2042 | device->rs_plan_s = new_plan; | |
b411b363 PR |
2043 | nbc = NULL; |
2044 | resync_lru = NULL; | |
daeda1cc | 2045 | new_disk_conf = NULL; |
9958c857 | 2046 | new_plan = NULL; |
b411b363 | 2047 | |
1ec317d3 | 2048 | drbd_resync_after_changed(device); |
f6ba8636 | 2049 | drbd_bump_write_ordering(device->resource, device->ldev, WO_BDEV_FLUSH); |
28bc3b8c | 2050 | unlock_all_resources(); |
b411b363 | 2051 | |
b30ab791 AG |
2052 | if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY)) |
2053 | set_bit(CRASHED_PRIMARY, &device->flags); | |
b411b363 | 2054 | else |
b30ab791 | 2055 | clear_bit(CRASHED_PRIMARY, &device->flags); |
b411b363 | 2056 | |
b30ab791 | 2057 | if (drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) && |
6bbf53ca | 2058 | !(device->state.role == R_PRIMARY && device->resource->susp_nod)) |
b30ab791 | 2059 | set_bit(CRASHED_PRIMARY, &device->flags); |
b411b363 | 2060 | |
b30ab791 AG |
2061 | device->send_cnt = 0; |
2062 | device->recv_cnt = 0; | |
2063 | device->read_cnt = 0; | |
2064 | device->writ_cnt = 0; | |
b411b363 | 2065 | |
9104d31a | 2066 | drbd_reconsider_queue_parameters(device, device->ldev, NULL); |
b411b363 PR |
2067 | |
2068 | /* If I am currently not R_PRIMARY, | |
2069 | * but meta data primary indicator is set, | |
2070 | * I just now recover from a hard crash, | |
2071 | * and have been R_PRIMARY before that crash. | |
2072 | * | |
2073 | * Now, if I had no connection before that crash | |
2074 | * (have been degraded R_PRIMARY), chances are that | |
2075 | * I won't find my peer now either. | |
2076 | * | |
2077 | * In that case, and _only_ in that case, | |
2078 | * we use the degr-wfc-timeout instead of the default, | |
2079 | * so we can automatically recover from a crash of a | |
2080 | * degraded but active "cluster" after a certain timeout. | |
2081 | */ | |
b30ab791 AG |
2082 | clear_bit(USE_DEGR_WFC_T, &device->flags); |
2083 | if (device->state.role != R_PRIMARY && | |
2084 | drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) && | |
2085 | !drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND)) | |
2086 | set_bit(USE_DEGR_WFC_T, &device->flags); | |
b411b363 | 2087 | |
b30ab791 | 2088 | dd = drbd_determine_dev_size(device, 0, NULL); |
d752b269 | 2089 | if (dd <= DS_ERROR) { |
b411b363 PR |
2090 | retcode = ERR_NOMEM_BITMAP; |
2091 | goto force_diskless_dec; | |
e96c9633 | 2092 | } else if (dd == DS_GREW) |
b30ab791 | 2093 | set_bit(RESYNC_AFTER_NEG, &device->flags); |
b411b363 | 2094 | |
b30ab791 AG |
2095 | if (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) || |
2096 | (test_bit(CRASHED_PRIMARY, &device->flags) && | |
2097 | drbd_md_test_flag(device->ldev, MDF_AL_DISABLED))) { | |
d0180171 | 2098 | drbd_info(device, "Assuming that all blocks are out of sync " |
b411b363 | 2099 | "(aka FullSync)\n"); |
b30ab791 | 2100 | if (drbd_bitmap_io(device, &drbd_bmio_set_n_write, |
20ceb2b2 | 2101 | "set_n_write from attaching", BM_LOCKED_MASK)) { |
b411b363 PR |
2102 | retcode = ERR_IO_MD_DISK; |
2103 | goto force_diskless_dec; | |
2104 | } | |
2105 | } else { | |
b30ab791 | 2106 | if (drbd_bitmap_io(device, &drbd_bm_read, |
22ab6a30 | 2107 | "read from attaching", BM_LOCKED_MASK)) { |
19f843aa LE |
2108 | retcode = ERR_IO_MD_DISK; |
2109 | goto force_diskless_dec; | |
2110 | } | |
b411b363 PR |
2111 | } |
2112 | ||
b30ab791 AG |
2113 | if (_drbd_bm_total_weight(device) == drbd_bm_bits(device)) |
2114 | drbd_suspend_al(device); /* IO is still suspended here... */ | |
0778286a | 2115 | |
0500813f | 2116 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 | 2117 | os = drbd_read_state(device); |
78bae59b | 2118 | ns = os; |
b411b363 PR |
2119 | /* If MDF_CONSISTENT is not set go into inconsistent state, |
2120 | otherwise investigate MDF_WasUpToDate... | |
2121 | If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state, | |
2122 | otherwise into D_CONSISTENT state. | |
2123 | */ | |
b30ab791 AG |
2124 | if (drbd_md_test_flag(device->ldev, MDF_CONSISTENT)) { |
2125 | if (drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE)) | |
b411b363 PR |
2126 | ns.disk = D_CONSISTENT; |
2127 | else | |
2128 | ns.disk = D_OUTDATED; | |
2129 | } else { | |
2130 | ns.disk = D_INCONSISTENT; | |
2131 | } | |
2132 | ||
b30ab791 | 2133 | if (drbd_md_test_flag(device->ldev, MDF_PEER_OUT_DATED)) |
b411b363 PR |
2134 | ns.pdsk = D_OUTDATED; |
2135 | ||
daeda1cc PR |
2136 | rcu_read_lock(); |
2137 | if (ns.disk == D_CONSISTENT && | |
b30ab791 | 2138 | (ns.pdsk == D_OUTDATED || rcu_dereference(device->ldev->disk_conf)->fencing == FP_DONT_CARE)) |
b411b363 PR |
2139 | ns.disk = D_UP_TO_DATE; |
2140 | ||
2141 | /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, | |
2142 | MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before | |
2143 | this point, because drbd_request_state() modifies these | |
2144 | flags. */ | |
2145 | ||
b30ab791 AG |
2146 | if (rcu_dereference(device->ldev->disk_conf)->al_updates) |
2147 | device->ldev->md.flags &= ~MDF_AL_DISABLED; | |
9a51ab1c | 2148 | else |
b30ab791 | 2149 | device->ldev->md.flags |= MDF_AL_DISABLED; |
9a51ab1c PR |
2150 | |
2151 | rcu_read_unlock(); | |
2152 | ||
b411b363 PR |
2153 | /* In case we are C_CONNECTED postpone any decision on the new disk |
2154 | state after the negotiation phase. */ | |
b30ab791 AG |
2155 | if (device->state.conn == C_CONNECTED) { |
2156 | device->new_state_tmp.i = ns.i; | |
b411b363 PR |
2157 | ns.i = os.i; |
2158 | ns.disk = D_NEGOTIATING; | |
dc66c74d PR |
2159 | |
2160 | /* We expect to receive up-to-date UUIDs soon. | |
2161 | To avoid a race in receive_state, free p_uuid while | |
2162 | holding req_lock. I.e. atomic with the state change */ | |
b30ab791 AG |
2163 | kfree(device->p_uuid); |
2164 | device->p_uuid = NULL; | |
b411b363 PR |
2165 | } |
2166 | ||
b30ab791 | 2167 | rv = _drbd_set_state(device, ns, CS_VERBOSE, NULL); |
0500813f | 2168 | spin_unlock_irq(&device->resource->req_lock); |
b411b363 PR |
2169 | |
2170 | if (rv < SS_SUCCESS) | |
2171 | goto force_diskless_dec; | |
2172 | ||
b30ab791 | 2173 | mod_timer(&device->request_timer, jiffies + HZ); |
cdfda633 | 2174 | |
b30ab791 AG |
2175 | if (device->state.role == R_PRIMARY) |
2176 | device->ldev->md.uuid[UI_CURRENT] |= (u64)1; | |
b411b363 | 2177 | else |
b30ab791 | 2178 | device->ldev->md.uuid[UI_CURRENT] &= ~(u64)1; |
b411b363 | 2179 | |
b30ab791 AG |
2180 | drbd_md_mark_dirty(device); |
2181 | drbd_md_sync(device); | |
b411b363 | 2182 | |
b30ab791 AG |
2183 | kobject_uevent(&disk_to_dev(device->vdisk)->kobj, KOBJ_CHANGE); |
2184 | put_ldev(device); | |
44a4d551 | 2185 | conn_reconfig_done(connection); |
9e276872 | 2186 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
a910b123 | 2187 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2188 | return 0; |
2189 | ||
2190 | force_diskless_dec: | |
b30ab791 | 2191 | put_ldev(device); |
b411b363 | 2192 | force_diskless: |
b30ab791 AG |
2193 | drbd_force_state(device, NS(disk, D_DISKLESS)); |
2194 | drbd_md_sync(device); | |
b411b363 | 2195 | fail: |
44a4d551 | 2196 | conn_reconfig_done(connection); |
b411b363 | 2197 | if (nbc) { |
63a7c8ad LE |
2198 | close_backing_dev(device, nbc->md_bdev, nbc->md_bdev != nbc->backing_bdev); |
2199 | close_backing_dev(device, nbc->backing_bdev, true); | |
b411b363 PR |
2200 | kfree(nbc); |
2201 | } | |
daeda1cc | 2202 | kfree(new_disk_conf); |
b411b363 | 2203 | lc_destroy(resync_lru); |
9958c857 | 2204 | kfree(new_plan); |
9e276872 | 2205 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
40cbf085 | 2206 | finish: |
a910b123 | 2207 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2208 | return 0; |
2209 | } | |
2210 | ||
b30ab791 | 2211 | static int adm_detach(struct drbd_device *device, int force) |
b411b363 | 2212 | { |
cdfda633 | 2213 | if (force) { |
b30ab791 AG |
2214 | set_bit(FORCE_DETACH, &device->flags); |
2215 | drbd_force_state(device, NS(disk, D_FAILED)); | |
33d32fa7 | 2216 | return SS_SUCCESS; |
02ee8f95 PR |
2217 | } |
2218 | ||
33d32fa7 | 2219 | return drbd_request_detach_interruptible(device); |
b411b363 PR |
2220 | } |
2221 | ||
82f59cc6 LE |
2222 | /* Detaching the disk is a process in multiple stages. First we need to lock |
2223 | * out application IO, in-flight IO, IO stuck in drbd_al_begin_io. | |
2224 | * Then we transition to D_DISKLESS, and wait for put_ldev() to return all | |
2225 | * internal references as well. | |
2226 | * Only then we have finally detached. */ | |
3b98c0c2 | 2227 | int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2228 | { |
a910b123 | 2229 | struct drbd_config_context adm_ctx; |
116676ca | 2230 | enum drbd_ret_code retcode; |
cdfda633 PR |
2231 | struct detach_parms parms = { }; |
2232 | int err; | |
b411b363 | 2233 | |
a910b123 | 2234 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2235 | if (!adm_ctx.reply_skb) |
2236 | return retcode; | |
2237 | if (retcode != NO_ERROR) | |
2238 | goto out; | |
b411b363 | 2239 | |
cdfda633 PR |
2240 | if (info->attrs[DRBD_NLA_DETACH_PARMS]) { |
2241 | err = detach_parms_from_attrs(&parms, info); | |
2242 | if (err) { | |
2243 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 2244 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
cdfda633 PR |
2245 | goto out; |
2246 | } | |
b411b363 PR |
2247 | } |
2248 | ||
9e276872 | 2249 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 2250 | retcode = adm_detach(adm_ctx.device, parms.force_detach); |
9e276872 | 2251 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2252 | out: |
a910b123 | 2253 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2254 | return 0; |
2255 | } | |
b411b363 | 2256 | |
bde89a9e | 2257 | static bool conn_resync_running(struct drbd_connection *connection) |
f399002e | 2258 | { |
c06ece6b | 2259 | struct drbd_peer_device *peer_device; |
695d08fa | 2260 | bool rv = false; |
f399002e LE |
2261 | int vnr; |
2262 | ||
695d08fa | 2263 | rcu_read_lock(); |
c06ece6b AG |
2264 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2265 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2266 | if (device->state.conn == C_SYNC_SOURCE || |
2267 | device->state.conn == C_SYNC_TARGET || | |
2268 | device->state.conn == C_PAUSED_SYNC_S || | |
2269 | device->state.conn == C_PAUSED_SYNC_T) { | |
695d08fa PR |
2270 | rv = true; |
2271 | break; | |
2272 | } | |
b411b363 | 2273 | } |
695d08fa | 2274 | rcu_read_unlock(); |
b411b363 | 2275 | |
695d08fa | 2276 | return rv; |
f399002e | 2277 | } |
47ff2d0a | 2278 | |
bde89a9e | 2279 | static bool conn_ov_running(struct drbd_connection *connection) |
f399002e | 2280 | { |
c06ece6b | 2281 | struct drbd_peer_device *peer_device; |
695d08fa | 2282 | bool rv = false; |
f399002e LE |
2283 | int vnr; |
2284 | ||
695d08fa | 2285 | rcu_read_lock(); |
c06ece6b AG |
2286 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
2287 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2288 | if (device->state.conn == C_VERIFY_S || |
2289 | device->state.conn == C_VERIFY_T) { | |
695d08fa PR |
2290 | rv = true; |
2291 | break; | |
47ff2d0a PR |
2292 | } |
2293 | } | |
695d08fa | 2294 | rcu_read_unlock(); |
b411b363 | 2295 | |
695d08fa | 2296 | return rv; |
f399002e | 2297 | } |
422028b1 | 2298 | |
cd64397c | 2299 | static enum drbd_ret_code |
270eb5c9 | 2300 | _check_net_options(struct drbd_connection *connection, struct net_conf *old_net_conf, struct net_conf *new_net_conf) |
cd64397c | 2301 | { |
c06ece6b | 2302 | struct drbd_peer_device *peer_device; |
cd64397c | 2303 | int i; |
b411b363 | 2304 | |
270eb5c9 AG |
2305 | if (old_net_conf && connection->cstate == C_WF_REPORT_PARAMS && connection->agreed_pro_version < 100) { |
2306 | if (new_net_conf->wire_protocol != old_net_conf->wire_protocol) | |
dcb20d1a | 2307 | return ERR_NEED_APV_100; |
b411b363 | 2308 | |
270eb5c9 | 2309 | if (new_net_conf->two_primaries != old_net_conf->two_primaries) |
dcb20d1a PR |
2310 | return ERR_NEED_APV_100; |
2311 | ||
270eb5c9 | 2312 | if (strcmp(new_net_conf->integrity_alg, old_net_conf->integrity_alg)) |
dcb20d1a | 2313 | return ERR_NEED_APV_100; |
b411b363 PR |
2314 | } |
2315 | ||
270eb5c9 | 2316 | if (!new_net_conf->two_primaries && |
bde89a9e AG |
2317 | conn_highest_role(connection) == R_PRIMARY && |
2318 | conn_highest_peer(connection) == R_PRIMARY) | |
dcb20d1a | 2319 | return ERR_NEED_ALLOW_TWO_PRI; |
b411b363 | 2320 | |
270eb5c9 AG |
2321 | if (new_net_conf->two_primaries && |
2322 | (new_net_conf->wire_protocol != DRBD_PROT_C)) | |
cd64397c PR |
2323 | return ERR_NOT_PROTO_C; |
2324 | ||
c06ece6b AG |
2325 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2326 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2327 | if (get_ldev(device)) { |
2328 | enum drbd_fencing_p fp = rcu_dereference(device->ldev->disk_conf)->fencing; | |
2329 | put_ldev(device); | |
270eb5c9 | 2330 | if (new_net_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) |
cd64397c | 2331 | return ERR_STONITH_AND_PROT_A; |
b411b363 | 2332 | } |
270eb5c9 | 2333 | if (device->state.role == R_PRIMARY && new_net_conf->discard_my_data) |
eb12010e | 2334 | return ERR_DISCARD_IMPOSSIBLE; |
b411b363 PR |
2335 | } |
2336 | ||
270eb5c9 | 2337 | if (new_net_conf->on_congestion != OC_BLOCK && new_net_conf->wire_protocol != DRBD_PROT_A) |
cd64397c | 2338 | return ERR_CONG_NOT_PROTO_A; |
b411b363 | 2339 | |
cd64397c PR |
2340 | return NO_ERROR; |
2341 | } | |
b411b363 | 2342 | |
44ed167d | 2343 | static enum drbd_ret_code |
270eb5c9 | 2344 | check_net_options(struct drbd_connection *connection, struct net_conf *new_net_conf) |
44ed167d | 2345 | { |
e9d5d4a0 | 2346 | enum drbd_ret_code rv; |
c06ece6b | 2347 | struct drbd_peer_device *peer_device; |
44ed167d | 2348 | int i; |
b411b363 | 2349 | |
44ed167d | 2350 | rcu_read_lock(); |
270eb5c9 | 2351 | rv = _check_net_options(connection, rcu_dereference(connection->net_conf), new_net_conf); |
44ed167d | 2352 | rcu_read_unlock(); |
b411b363 | 2353 | |
179e20b8 | 2354 | /* connection->peer_devices protected by genl_lock() here */ |
c06ece6b AG |
2355 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2356 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2357 | if (!device->bitmap) { |
2358 | if (drbd_bm_init(device)) | |
44ed167d | 2359 | return ERR_NOMEM; |
b411b363 PR |
2360 | } |
2361 | } | |
2362 | ||
44ed167d PR |
2363 | return rv; |
2364 | } | |
b411b363 | 2365 | |
0fd0ea06 | 2366 | struct crypto { |
3d0e6375 KC |
2367 | struct crypto_shash *verify_tfm; |
2368 | struct crypto_shash *csums_tfm; | |
9534d671 | 2369 | struct crypto_shash *cram_hmac_tfm; |
3d0e6375 | 2370 | struct crypto_shash *integrity_tfm; |
0fd0ea06 | 2371 | }; |
b411b363 | 2372 | |
0fd0ea06 | 2373 | static int |
9534d671 | 2374 | alloc_shash(struct crypto_shash **tfm, char *tfm_name, int err_alg) |
0fd0ea06 PR |
2375 | { |
2376 | if (!tfm_name[0]) | |
2377 | return NO_ERROR; | |
b411b363 | 2378 | |
9534d671 HX |
2379 | *tfm = crypto_alloc_shash(tfm_name, 0, 0); |
2380 | if (IS_ERR(*tfm)) { | |
2381 | *tfm = NULL; | |
2382 | return err_alg; | |
2383 | } | |
2384 | ||
2385 | return NO_ERROR; | |
2386 | } | |
2387 | ||
0fd0ea06 | 2388 | static enum drbd_ret_code |
270eb5c9 | 2389 | alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf) |
0fd0ea06 PR |
2390 | { |
2391 | char hmac_name[CRYPTO_MAX_ALG_NAME]; | |
2392 | enum drbd_ret_code rv; | |
0fd0ea06 | 2393 | |
3d0e6375 | 2394 | rv = alloc_shash(&crypto->csums_tfm, new_net_conf->csums_alg, |
9534d671 | 2395 | ERR_CSUMS_ALG); |
0fd0ea06 PR |
2396 | if (rv != NO_ERROR) |
2397 | return rv; | |
3d0e6375 | 2398 | rv = alloc_shash(&crypto->verify_tfm, new_net_conf->verify_alg, |
9534d671 | 2399 | ERR_VERIFY_ALG); |
0fd0ea06 PR |
2400 | if (rv != NO_ERROR) |
2401 | return rv; | |
3d0e6375 | 2402 | rv = alloc_shash(&crypto->integrity_tfm, new_net_conf->integrity_alg, |
9534d671 | 2403 | ERR_INTEGRITY_ALG); |
0fd0ea06 PR |
2404 | if (rv != NO_ERROR) |
2405 | return rv; | |
270eb5c9 | 2406 | if (new_net_conf->cram_hmac_alg[0] != 0) { |
0fd0ea06 | 2407 | snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", |
270eb5c9 | 2408 | new_net_conf->cram_hmac_alg); |
b411b363 | 2409 | |
9534d671 HX |
2410 | rv = alloc_shash(&crypto->cram_hmac_tfm, hmac_name, |
2411 | ERR_AUTH_ALG); | |
b411b363 PR |
2412 | } |
2413 | ||
0fd0ea06 PR |
2414 | return rv; |
2415 | } | |
b411b363 | 2416 | |
0fd0ea06 PR |
2417 | static void free_crypto(struct crypto *crypto) |
2418 | { | |
9534d671 | 2419 | crypto_free_shash(crypto->cram_hmac_tfm); |
3d0e6375 KC |
2420 | crypto_free_shash(crypto->integrity_tfm); |
2421 | crypto_free_shash(crypto->csums_tfm); | |
2422 | crypto_free_shash(crypto->verify_tfm); | |
0fd0ea06 | 2423 | } |
b411b363 | 2424 | |
f399002e LE |
2425 | int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info) |
2426 | { | |
a910b123 | 2427 | struct drbd_config_context adm_ctx; |
f399002e | 2428 | enum drbd_ret_code retcode; |
bde89a9e | 2429 | struct drbd_connection *connection; |
270eb5c9 | 2430 | struct net_conf *old_net_conf, *new_net_conf = NULL; |
f399002e LE |
2431 | int err; |
2432 | int ovr; /* online verify running */ | |
2433 | int rsr; /* re-sync running */ | |
0fd0ea06 | 2434 | struct crypto crypto = { }; |
b411b363 | 2435 | |
a910b123 | 2436 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION); |
f399002e LE |
2437 | if (!adm_ctx.reply_skb) |
2438 | return retcode; | |
2439 | if (retcode != NO_ERROR) | |
9e276872 | 2440 | goto finish; |
b411b363 | 2441 | |
bde89a9e | 2442 | connection = adm_ctx.connection; |
9e276872 | 2443 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2444 | |
270eb5c9 AG |
2445 | new_net_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL); |
2446 | if (!new_net_conf) { | |
f399002e LE |
2447 | retcode = ERR_NOMEM; |
2448 | goto out; | |
2449 | } | |
b411b363 | 2450 | |
bde89a9e | 2451 | conn_reconfig_start(connection); |
b411b363 | 2452 | |
bde89a9e | 2453 | mutex_lock(&connection->data.mutex); |
0500813f | 2454 | mutex_lock(&connection->resource->conf_update); |
270eb5c9 | 2455 | old_net_conf = connection->net_conf; |
2561b9c1 | 2456 | |
270eb5c9 | 2457 | if (!old_net_conf) { |
a910b123 | 2458 | drbd_msg_put_info(adm_ctx.reply_skb, "net conf missing, try connect"); |
f399002e | 2459 | retcode = ERR_INVALID_REQUEST; |
2561b9c1 PR |
2460 | goto fail; |
2461 | } | |
2462 | ||
270eb5c9 | 2463 | *new_net_conf = *old_net_conf; |
5979e361 | 2464 | if (should_set_defaults(info)) |
270eb5c9 | 2465 | set_net_conf_defaults(new_net_conf); |
f399002e | 2466 | |
270eb5c9 | 2467 | err = net_conf_from_attrs_for_change(new_net_conf, info); |
c75b9b10 | 2468 | if (err && err != -ENOMSG) { |
f399002e | 2469 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2470 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
f399002e | 2471 | goto fail; |
2561b9c1 | 2472 | } |
b411b363 | 2473 | |
270eb5c9 | 2474 | retcode = check_net_options(connection, new_net_conf); |
cd64397c PR |
2475 | if (retcode != NO_ERROR) |
2476 | goto fail; | |
b411b363 | 2477 | |
f399002e | 2478 | /* re-sync running */ |
bde89a9e | 2479 | rsr = conn_resync_running(connection); |
270eb5c9 | 2480 | if (rsr && strcmp(new_net_conf->csums_alg, old_net_conf->csums_alg)) { |
f399002e | 2481 | retcode = ERR_CSUMS_RESYNC_RUNNING; |
91fd4dad | 2482 | goto fail; |
b411b363 PR |
2483 | } |
2484 | ||
f399002e | 2485 | /* online verify running */ |
bde89a9e | 2486 | ovr = conn_ov_running(connection); |
270eb5c9 | 2487 | if (ovr && strcmp(new_net_conf->verify_alg, old_net_conf->verify_alg)) { |
0fd0ea06 | 2488 | retcode = ERR_VERIFY_RUNNING; |
b411b363 | 2489 | goto fail; |
f399002e | 2490 | } |
b411b363 | 2491 | |
270eb5c9 | 2492 | retcode = alloc_crypto(&crypto, new_net_conf); |
0fd0ea06 | 2493 | if (retcode != NO_ERROR) |
b411b363 | 2494 | goto fail; |
f399002e | 2495 | |
270eb5c9 | 2496 | rcu_assign_pointer(connection->net_conf, new_net_conf); |
f399002e LE |
2497 | |
2498 | if (!rsr) { | |
3d0e6375 | 2499 | crypto_free_shash(connection->csums_tfm); |
bde89a9e | 2500 | connection->csums_tfm = crypto.csums_tfm; |
0fd0ea06 | 2501 | crypto.csums_tfm = NULL; |
f399002e LE |
2502 | } |
2503 | if (!ovr) { | |
3d0e6375 | 2504 | crypto_free_shash(connection->verify_tfm); |
bde89a9e | 2505 | connection->verify_tfm = crypto.verify_tfm; |
0fd0ea06 | 2506 | crypto.verify_tfm = NULL; |
b411b363 PR |
2507 | } |
2508 | ||
3d0e6375 | 2509 | crypto_free_shash(connection->integrity_tfm); |
bde89a9e AG |
2510 | connection->integrity_tfm = crypto.integrity_tfm; |
2511 | if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100) | |
2512 | /* Do this without trying to take connection->data.mutex again. */ | |
2513 | __drbd_send_protocol(connection, P_PROTOCOL_UPDATE); | |
0fd0ea06 | 2514 | |
9534d671 | 2515 | crypto_free_shash(connection->cram_hmac_tfm); |
bde89a9e | 2516 | connection->cram_hmac_tfm = crypto.cram_hmac_tfm; |
0fd0ea06 | 2517 | |
0500813f | 2518 | mutex_unlock(&connection->resource->conf_update); |
bde89a9e | 2519 | mutex_unlock(&connection->data.mutex); |
91fd4dad | 2520 | synchronize_rcu(); |
270eb5c9 | 2521 | kfree(old_net_conf); |
91fd4dad | 2522 | |
69a22773 AG |
2523 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
2524 | struct drbd_peer_device *peer_device; | |
2525 | int vnr; | |
2526 | ||
2527 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) | |
2528 | drbd_send_sync_param(peer_device); | |
2529 | } | |
f399002e | 2530 | |
91fd4dad PR |
2531 | goto done; |
2532 | ||
b411b363 | 2533 | fail: |
0500813f | 2534 | mutex_unlock(&connection->resource->conf_update); |
bde89a9e | 2535 | mutex_unlock(&connection->data.mutex); |
0fd0ea06 | 2536 | free_crypto(&crypto); |
270eb5c9 | 2537 | kfree(new_net_conf); |
91fd4dad | 2538 | done: |
bde89a9e | 2539 | conn_reconfig_done(connection); |
f399002e | 2540 | out: |
9e276872 LE |
2541 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
2542 | finish: | |
a910b123 | 2543 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2544 | return 0; |
2545 | } | |
2546 | ||
a2972846 AG |
2547 | static void connection_to_info(struct connection_info *info, |
2548 | struct drbd_connection *connection) | |
2549 | { | |
2550 | info->conn_connection_state = connection->cstate; | |
2551 | info->conn_role = conn_highest_peer(connection); | |
2552 | } | |
2553 | ||
2554 | static void peer_device_to_info(struct peer_device_info *info, | |
2555 | struct drbd_peer_device *peer_device) | |
2556 | { | |
2557 | struct drbd_device *device = peer_device->device; | |
2558 | ||
2559 | info->peer_repl_state = | |
2560 | max_t(enum drbd_conns, C_WF_REPORT_PARAMS, device->state.conn); | |
2561 | info->peer_disk_state = device->state.pdsk; | |
2562 | info->peer_resync_susp_user = device->state.user_isp; | |
2563 | info->peer_resync_susp_peer = device->state.peer_isp; | |
2564 | info->peer_resync_susp_dependency = device->state.aftr_isp; | |
2565 | } | |
2566 | ||
3b98c0c2 | 2567 | int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2568 | { |
a2972846 AG |
2569 | struct connection_info connection_info; |
2570 | enum drbd_notification_type flags; | |
2571 | unsigned int peer_devices = 0; | |
a910b123 | 2572 | struct drbd_config_context adm_ctx; |
c06ece6b | 2573 | struct drbd_peer_device *peer_device; |
270eb5c9 | 2574 | struct net_conf *old_net_conf, *new_net_conf = NULL; |
0fd0ea06 | 2575 | struct crypto crypto = { }; |
77c556f6 | 2576 | struct drbd_resource *resource; |
bde89a9e | 2577 | struct drbd_connection *connection; |
3b98c0c2 LE |
2578 | enum drbd_ret_code retcode; |
2579 | int i; | |
2580 | int err; | |
b411b363 | 2581 | |
a910b123 | 2582 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
b411b363 | 2583 | |
3b98c0c2 LE |
2584 | if (!adm_ctx.reply_skb) |
2585 | return retcode; | |
2586 | if (retcode != NO_ERROR) | |
2587 | goto out; | |
089c075d | 2588 | if (!(adm_ctx.my_addr && adm_ctx.peer_addr)) { |
a910b123 | 2589 | drbd_msg_put_info(adm_ctx.reply_skb, "connection endpoint(s) missing"); |
089c075d AG |
2590 | retcode = ERR_INVALID_REQUEST; |
2591 | goto out; | |
2592 | } | |
b411b363 | 2593 | |
089c075d AG |
2594 | /* No need for _rcu here. All reconfiguration is |
2595 | * strictly serialized on genl_lock(). We are protected against | |
2596 | * concurrent reconfiguration/addition/deletion */ | |
77c556f6 AG |
2597 | for_each_resource(resource, &drbd_resources) { |
2598 | for_each_connection(connection, resource) { | |
2599 | if (nla_len(adm_ctx.my_addr) == connection->my_addr_len && | |
2600 | !memcmp(nla_data(adm_ctx.my_addr), &connection->my_addr, | |
2601 | connection->my_addr_len)) { | |
2602 | retcode = ERR_LOCAL_ADDR; | |
2603 | goto out; | |
2604 | } | |
b411b363 | 2605 | |
77c556f6 AG |
2606 | if (nla_len(adm_ctx.peer_addr) == connection->peer_addr_len && |
2607 | !memcmp(nla_data(adm_ctx.peer_addr), &connection->peer_addr, | |
2608 | connection->peer_addr_len)) { | |
2609 | retcode = ERR_PEER_ADDR; | |
2610 | goto out; | |
2611 | } | |
089c075d | 2612 | } |
b411b363 PR |
2613 | } |
2614 | ||
9e276872 | 2615 | mutex_lock(&adm_ctx.resource->adm_mutex); |
3ab706fe | 2616 | connection = first_connection(adm_ctx.resource); |
bde89a9e | 2617 | conn_reconfig_start(connection); |
b411b363 | 2618 | |
bde89a9e | 2619 | if (connection->cstate > C_STANDALONE) { |
b411b363 | 2620 | retcode = ERR_NET_CONFIGURED; |
b411b363 PR |
2621 | goto fail; |
2622 | } | |
2623 | ||
a209b4ae | 2624 | /* allocation not in the IO path, drbdsetup / netlink process context */ |
270eb5c9 AG |
2625 | new_net_conf = kzalloc(sizeof(*new_net_conf), GFP_KERNEL); |
2626 | if (!new_net_conf) { | |
b411b363 | 2627 | retcode = ERR_NOMEM; |
b411b363 PR |
2628 | goto fail; |
2629 | } | |
2630 | ||
270eb5c9 | 2631 | set_net_conf_defaults(new_net_conf); |
b411b363 | 2632 | |
270eb5c9 | 2633 | err = net_conf_from_attrs(new_net_conf, info); |
25e40932 | 2634 | if (err && err != -ENOMSG) { |
b411b363 | 2635 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2636 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2637 | goto fail; |
2638 | } | |
2639 | ||
270eb5c9 | 2640 | retcode = check_net_options(connection, new_net_conf); |
cd64397c | 2641 | if (retcode != NO_ERROR) |
422028b1 | 2642 | goto fail; |
b411b363 | 2643 | |
270eb5c9 | 2644 | retcode = alloc_crypto(&crypto, new_net_conf); |
0fd0ea06 PR |
2645 | if (retcode != NO_ERROR) |
2646 | goto fail; | |
b411b363 | 2647 | |
270eb5c9 | 2648 | ((char *)new_net_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0; |
7b4e4d31 | 2649 | |
b5043c5e | 2650 | drbd_flush_workqueue(&connection->sender_work); |
b411b363 | 2651 | |
0500813f | 2652 | mutex_lock(&adm_ctx.resource->conf_update); |
270eb5c9 AG |
2653 | old_net_conf = connection->net_conf; |
2654 | if (old_net_conf) { | |
b411b363 | 2655 | retcode = ERR_NET_CONFIGURED; |
0500813f | 2656 | mutex_unlock(&adm_ctx.resource->conf_update); |
b411b363 PR |
2657 | goto fail; |
2658 | } | |
270eb5c9 | 2659 | rcu_assign_pointer(connection->net_conf, new_net_conf); |
b411b363 | 2660 | |
bde89a9e AG |
2661 | conn_free_crypto(connection); |
2662 | connection->cram_hmac_tfm = crypto.cram_hmac_tfm; | |
2663 | connection->integrity_tfm = crypto.integrity_tfm; | |
2664 | connection->csums_tfm = crypto.csums_tfm; | |
2665 | connection->verify_tfm = crypto.verify_tfm; | |
b411b363 | 2666 | |
bde89a9e AG |
2667 | connection->my_addr_len = nla_len(adm_ctx.my_addr); |
2668 | memcpy(&connection->my_addr, nla_data(adm_ctx.my_addr), connection->my_addr_len); | |
2669 | connection->peer_addr_len = nla_len(adm_ctx.peer_addr); | |
2670 | memcpy(&connection->peer_addr, nla_data(adm_ctx.peer_addr), connection->peer_addr_len); | |
b411b363 | 2671 | |
a2972846 AG |
2672 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2673 | peer_devices++; | |
2674 | } | |
2675 | ||
2676 | connection_to_info(&connection_info, connection); | |
2677 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
2678 | mutex_lock(¬ification_mutex); | |
2679 | notify_connection_state(NULL, 0, connection, &connection_info, NOTIFY_CREATE | flags); | |
2680 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { | |
2681 | struct peer_device_info peer_device_info; | |
2682 | ||
2683 | peer_device_to_info(&peer_device_info, peer_device); | |
2684 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
2685 | notify_peer_device_state(NULL, 0, peer_device, &peer_device_info, NOTIFY_CREATE | flags); | |
2686 | } | |
2687 | mutex_unlock(¬ification_mutex); | |
0500813f | 2688 | mutex_unlock(&adm_ctx.resource->conf_update); |
b411b363 | 2689 | |
695d08fa | 2690 | rcu_read_lock(); |
c06ece6b AG |
2691 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { |
2692 | struct drbd_device *device = peer_device->device; | |
b30ab791 AG |
2693 | device->send_cnt = 0; |
2694 | device->recv_cnt = 0; | |
b411b363 | 2695 | } |
695d08fa | 2696 | rcu_read_unlock(); |
b411b363 | 2697 | |
bde89a9e | 2698 | retcode = conn_request_state(connection, NS(conn, C_UNCONNECTED), CS_VERBOSE); |
b411b363 | 2699 | |
bde89a9e | 2700 | conn_reconfig_done(connection); |
9e276872 | 2701 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
a910b123 | 2702 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 | 2703 | return 0; |
b411b363 | 2704 | |
b411b363 | 2705 | fail: |
0fd0ea06 | 2706 | free_crypto(&crypto); |
270eb5c9 | 2707 | kfree(new_net_conf); |
b411b363 | 2708 | |
bde89a9e | 2709 | conn_reconfig_done(connection); |
9e276872 | 2710 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 2711 | out: |
a910b123 | 2712 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2713 | return 0; |
2714 | } | |
2715 | ||
bde89a9e | 2716 | static enum drbd_state_rv conn_try_disconnect(struct drbd_connection *connection, bool force) |
85f75dd7 | 2717 | { |
be80ff88 | 2718 | enum drbd_conns cstate; |
85f75dd7 | 2719 | enum drbd_state_rv rv; |
85f75dd7 | 2720 | |
be80ff88 | 2721 | repeat: |
bde89a9e | 2722 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), |
f3dfa40a | 2723 | force ? CS_HARD : 0); |
85f75dd7 LE |
2724 | |
2725 | switch (rv) { | |
2726 | case SS_NOTHING_TO_DO: | |
f3dfa40a | 2727 | break; |
85f75dd7 LE |
2728 | case SS_ALREADY_STANDALONE: |
2729 | return SS_SUCCESS; | |
2730 | case SS_PRIMARY_NOP: | |
2731 | /* Our state checking code wants to see the peer outdated. */ | |
bde89a9e | 2732 | rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, pdsk, D_OUTDATED), 0); |
2bd5ed5d PR |
2733 | |
2734 | if (rv == SS_OUTDATE_WO_CONN) /* lost connection before graceful disconnect succeeded */ | |
bde89a9e | 2735 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_VERBOSE); |
2bd5ed5d | 2736 | |
85f75dd7 LE |
2737 | break; |
2738 | case SS_CW_FAILED_BY_PEER: | |
be80ff88 LE |
2739 | spin_lock_irq(&connection->resource->req_lock); |
2740 | cstate = connection->cstate; | |
2741 | spin_unlock_irq(&connection->resource->req_lock); | |
2742 | if (cstate <= C_WF_CONNECTION) | |
2743 | goto repeat; | |
85f75dd7 | 2744 | /* The peer probably wants to see us outdated. */ |
bde89a9e | 2745 | rv = conn_request_state(connection, NS2(conn, C_DISCONNECTING, |
85f75dd7 LE |
2746 | disk, D_OUTDATED), 0); |
2747 | if (rv == SS_IS_DISKLESS || rv == SS_LOWER_THAN_OUTDATED) { | |
bde89a9e | 2748 | rv = conn_request_state(connection, NS(conn, C_DISCONNECTING), |
f3dfa40a | 2749 | CS_HARD); |
b411b363 | 2750 | } |
85f75dd7 LE |
2751 | break; |
2752 | default:; | |
2753 | /* no special handling necessary */ | |
2754 | } | |
2755 | ||
f3dfa40a LE |
2756 | if (rv >= SS_SUCCESS) { |
2757 | enum drbd_state_rv rv2; | |
2758 | /* No one else can reconfigure the network while I am here. | |
2759 | * The state handling only uses drbd_thread_stop_nowait(), | |
2760 | * we want to really wait here until the receiver is no more. | |
2761 | */ | |
9693da23 | 2762 | drbd_thread_stop(&connection->receiver); |
f3dfa40a LE |
2763 | |
2764 | /* Race breaker. This additional state change request may be | |
2765 | * necessary, if this was a forced disconnect during a receiver | |
2766 | * restart. We may have "killed" the receiver thread just | |
8fe60551 | 2767 | * after drbd_receiver() returned. Typically, we should be |
f3dfa40a LE |
2768 | * C_STANDALONE already, now, and this becomes a no-op. |
2769 | */ | |
bde89a9e | 2770 | rv2 = conn_request_state(connection, NS(conn, C_STANDALONE), |
f3dfa40a LE |
2771 | CS_VERBOSE | CS_HARD); |
2772 | if (rv2 < SS_SUCCESS) | |
1ec861eb | 2773 | drbd_err(connection, |
f3dfa40a LE |
2774 | "unexpected rv2=%d in conn_try_disconnect()\n", |
2775 | rv2); | |
a2972846 AG |
2776 | /* Unlike in DRBD 9, the state engine has generated |
2777 | * NOTIFY_DESTROY events before clearing connection->net_conf. */ | |
b411b363 | 2778 | } |
85f75dd7 LE |
2779 | return rv; |
2780 | } | |
b411b363 | 2781 | |
3b98c0c2 | 2782 | int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2783 | { |
a910b123 | 2784 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2785 | struct disconnect_parms parms; |
bde89a9e | 2786 | struct drbd_connection *connection; |
85f75dd7 | 2787 | enum drbd_state_rv rv; |
3b98c0c2 LE |
2788 | enum drbd_ret_code retcode; |
2789 | int err; | |
2561b9c1 | 2790 | |
a910b123 | 2791 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_CONNECTION); |
3b98c0c2 LE |
2792 | if (!adm_ctx.reply_skb) |
2793 | return retcode; | |
2794 | if (retcode != NO_ERROR) | |
2561b9c1 | 2795 | goto fail; |
b411b363 | 2796 | |
bde89a9e | 2797 | connection = adm_ctx.connection; |
3b98c0c2 LE |
2798 | memset(&parms, 0, sizeof(parms)); |
2799 | if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { | |
f399002e | 2800 | err = disconnect_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
2801 | if (err) { |
2802 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 2803 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2804 | goto fail; |
2805 | } | |
2806 | } | |
2807 | ||
9e276872 | 2808 | mutex_lock(&adm_ctx.resource->adm_mutex); |
bde89a9e | 2809 | rv = conn_try_disconnect(connection, parms.force_disconnect); |
85f75dd7 | 2810 | if (rv < SS_SUCCESS) |
f3dfa40a LE |
2811 | retcode = rv; /* FIXME: Type mismatch. */ |
2812 | else | |
2813 | retcode = NO_ERROR; | |
9e276872 | 2814 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
b411b363 | 2815 | fail: |
a910b123 | 2816 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
2817 | return 0; |
2818 | } | |
2819 | ||
b30ab791 | 2820 | void resync_after_online_grow(struct drbd_device *device) |
b411b363 PR |
2821 | { |
2822 | int iass; /* I am sync source */ | |
2823 | ||
d0180171 | 2824 | drbd_info(device, "Resync of new storage after online grow\n"); |
b30ab791 AG |
2825 | if (device->state.role != device->state.peer) |
2826 | iass = (device->state.role == R_PRIMARY); | |
b411b363 | 2827 | else |
a6b32bc3 | 2828 | iass = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags); |
b411b363 PR |
2829 | |
2830 | if (iass) | |
b30ab791 | 2831 | drbd_start_resync(device, C_SYNC_SOURCE); |
b411b363 | 2832 | else |
b30ab791 | 2833 | _drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE); |
b411b363 PR |
2834 | } |
2835 | ||
3b98c0c2 | 2836 | int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2837 | { |
a910b123 | 2838 | struct drbd_config_context adm_ctx; |
daeda1cc | 2839 | struct disk_conf *old_disk_conf, *new_disk_conf = NULL; |
3b98c0c2 | 2840 | struct resize_parms rs; |
b30ab791 | 2841 | struct drbd_device *device; |
3b98c0c2 | 2842 | enum drbd_ret_code retcode; |
b411b363 | 2843 | enum determine_dev_size dd; |
d752b269 | 2844 | bool change_al_layout = false; |
6495d2c6 | 2845 | enum dds_flags ddsf; |
daeda1cc | 2846 | sector_t u_size; |
3b98c0c2 | 2847 | int err; |
b411b363 | 2848 | |
a910b123 | 2849 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
2850 | if (!adm_ctx.reply_skb) |
2851 | return retcode; | |
2852 | if (retcode != NO_ERROR) | |
9e276872 | 2853 | goto finish; |
3b98c0c2 | 2854 | |
9e276872 | 2855 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
2856 | device = adm_ctx.device; |
2857 | if (!get_ldev(device)) { | |
d752b269 PR |
2858 | retcode = ERR_NO_DISK; |
2859 | goto fail; | |
2860 | } | |
2861 | ||
3b98c0c2 | 2862 | memset(&rs, 0, sizeof(struct resize_parms)); |
b30ab791 AG |
2863 | rs.al_stripes = device->ldev->md.al_stripes; |
2864 | rs.al_stripe_size = device->ldev->md.al_stripe_size_4k * 4; | |
3b98c0c2 | 2865 | if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { |
f399002e | 2866 | err = resize_parms_from_attrs(&rs, info); |
b411b363 | 2867 | if (err) { |
3b98c0c2 | 2868 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2869 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
d752b269 | 2870 | goto fail_ldev; |
b411b363 PR |
2871 | } |
2872 | } | |
2873 | ||
b30ab791 | 2874 | if (device->state.conn > C_CONNECTED) { |
b411b363 | 2875 | retcode = ERR_RESIZE_RESYNC; |
d752b269 | 2876 | goto fail_ldev; |
b411b363 | 2877 | } |
b411b363 | 2878 | |
b30ab791 AG |
2879 | if (device->state.role == R_SECONDARY && |
2880 | device->state.peer == R_SECONDARY) { | |
b411b363 | 2881 | retcode = ERR_NO_PRIMARY; |
d752b269 | 2882 | goto fail_ldev; |
b411b363 | 2883 | } |
b411b363 | 2884 | |
a6b32bc3 | 2885 | if (rs.no_resync && first_peer_device(device)->connection->agreed_pro_version < 93) { |
6495d2c6 | 2886 | retcode = ERR_NEED_APV_93; |
9bcd2521 | 2887 | goto fail_ldev; |
6495d2c6 PR |
2888 | } |
2889 | ||
daeda1cc | 2890 | rcu_read_lock(); |
b30ab791 | 2891 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
daeda1cc PR |
2892 | rcu_read_unlock(); |
2893 | if (u_size != (sector_t)rs.resize_size) { | |
2894 | new_disk_conf = kmalloc(sizeof(struct disk_conf), GFP_KERNEL); | |
2895 | if (!new_disk_conf) { | |
778f271d | 2896 | retcode = ERR_NOMEM; |
9bcd2521 | 2897 | goto fail_ldev; |
778f271d PR |
2898 | } |
2899 | } | |
2900 | ||
b30ab791 AG |
2901 | if (device->ldev->md.al_stripes != rs.al_stripes || |
2902 | device->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) { | |
d752b269 PR |
2903 | u32 al_size_k = rs.al_stripes * rs.al_stripe_size; |
2904 | ||
2905 | if (al_size_k > (16 * 1024 * 1024)) { | |
2906 | retcode = ERR_MD_LAYOUT_TOO_BIG; | |
2907 | goto fail_ldev; | |
2908 | } | |
2909 | ||
2910 | if (al_size_k < MD_32kB_SECT/2) { | |
2911 | retcode = ERR_MD_LAYOUT_TOO_SMALL; | |
2912 | goto fail_ldev; | |
2913 | } | |
2914 | ||
cdc6af8d | 2915 | if (device->state.conn != C_CONNECTED && !rs.resize_force) { |
d752b269 PR |
2916 | retcode = ERR_MD_LAYOUT_CONNECTED; |
2917 | goto fail_ldev; | |
2918 | } | |
2919 | ||
2920 | change_al_layout = true; | |
2921 | } | |
2922 | ||
b30ab791 AG |
2923 | if (device->ldev->known_size != drbd_get_capacity(device->ldev->backing_bdev)) |
2924 | device->ldev->known_size = drbd_get_capacity(device->ldev->backing_bdev); | |
b411b363 | 2925 | |
daeda1cc | 2926 | if (new_disk_conf) { |
0500813f | 2927 | mutex_lock(&device->resource->conf_update); |
b30ab791 | 2928 | old_disk_conf = device->ldev->disk_conf; |
daeda1cc PR |
2929 | *new_disk_conf = *old_disk_conf; |
2930 | new_disk_conf->disk_size = (sector_t)rs.resize_size; | |
b30ab791 | 2931 | rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); |
0500813f | 2932 | mutex_unlock(&device->resource->conf_update); |
daeda1cc PR |
2933 | synchronize_rcu(); |
2934 | kfree(old_disk_conf); | |
70644786 | 2935 | new_disk_conf = NULL; |
b411b363 PR |
2936 | } |
2937 | ||
6495d2c6 | 2938 | ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); |
b30ab791 AG |
2939 | dd = drbd_determine_dev_size(device, ddsf, change_al_layout ? &rs : NULL); |
2940 | drbd_md_sync(device); | |
2941 | put_ldev(device); | |
e96c9633 | 2942 | if (dd == DS_ERROR) { |
b411b363 PR |
2943 | retcode = ERR_NOMEM_BITMAP; |
2944 | goto fail; | |
d752b269 PR |
2945 | } else if (dd == DS_ERROR_SPACE_MD) { |
2946 | retcode = ERR_MD_LAYOUT_NO_FIT; | |
2947 | goto fail; | |
2948 | } else if (dd == DS_ERROR_SHRINK) { | |
2949 | retcode = ERR_IMPLICIT_SHRINK; | |
2950 | goto fail; | |
b411b363 | 2951 | } |
778f271d | 2952 | |
b30ab791 | 2953 | if (device->state.conn == C_CONNECTED) { |
e96c9633 | 2954 | if (dd == DS_GREW) |
b30ab791 | 2955 | set_bit(RESIZE_PENDING, &device->flags); |
b411b363 | 2956 | |
69a22773 AG |
2957 | drbd_send_uuids(first_peer_device(device)); |
2958 | drbd_send_sizes(first_peer_device(device), 1, ddsf); | |
778f271d PR |
2959 | } |
2960 | ||
b411b363 | 2961 | fail: |
9e276872 LE |
2962 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
2963 | finish: | |
a910b123 | 2964 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 | 2965 | return 0; |
b411b363 | 2966 | |
9bcd2521 | 2967 | fail_ldev: |
b30ab791 | 2968 | put_ldev(device); |
70644786 | 2969 | kfree(new_disk_conf); |
9bcd2521 | 2970 | goto fail; |
b411b363 | 2971 | } |
b411b363 | 2972 | |
f399002e | 2973 | int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 2974 | { |
a910b123 | 2975 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 2976 | enum drbd_ret_code retcode; |
b57a1e27 | 2977 | struct res_opts res_opts; |
f399002e | 2978 | int err; |
b411b363 | 2979 | |
a910b123 | 2980 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
2981 | if (!adm_ctx.reply_skb) |
2982 | return retcode; | |
2983 | if (retcode != NO_ERROR) | |
2984 | goto fail; | |
b411b363 | 2985 | |
eb6bea67 | 2986 | res_opts = adm_ctx.resource->res_opts; |
5979e361 | 2987 | if (should_set_defaults(info)) |
b966b5dd | 2988 | set_res_opts_defaults(&res_opts); |
b411b363 | 2989 | |
b57a1e27 | 2990 | err = res_opts_from_attrs(&res_opts, info); |
c75b9b10 | 2991 | if (err && err != -ENOMSG) { |
b411b363 | 2992 | retcode = ERR_MANDATORY_TAG; |
a910b123 | 2993 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
b411b363 PR |
2994 | goto fail; |
2995 | } | |
2996 | ||
9e276872 | 2997 | mutex_lock(&adm_ctx.resource->adm_mutex); |
eb6bea67 | 2998 | err = set_resource_options(adm_ctx.resource, &res_opts); |
afbbfa88 AG |
2999 | if (err) { |
3000 | retcode = ERR_INVALID_REQUEST; | |
3001 | if (err == -ENOMEM) | |
3002 | retcode = ERR_NOMEM; | |
b411b363 | 3003 | } |
9e276872 | 3004 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
b411b363 | 3005 | |
b411b363 | 3006 | fail: |
a910b123 | 3007 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3008 | return 0; |
3009 | } | |
3010 | ||
3b98c0c2 | 3011 | int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3012 | { |
a910b123 | 3013 | struct drbd_config_context adm_ctx; |
b30ab791 | 3014 | struct drbd_device *device; |
3b98c0c2 LE |
3015 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
3016 | ||
a910b123 | 3017 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3018 | if (!adm_ctx.reply_skb) |
3019 | return retcode; | |
3020 | if (retcode != NO_ERROR) | |
3021 | goto out; | |
3022 | ||
b30ab791 | 3023 | device = adm_ctx.device; |
8fe39aac PR |
3024 | if (!get_ldev(device)) { |
3025 | retcode = ERR_NO_DISK; | |
3026 | goto out; | |
3027 | } | |
3028 | ||
3029 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 3030 | |
194bfb32 | 3031 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
3032 | * resync just being finished, wait for it before requesting a new resync. |
3033 | * Also wait for it's after_state_ch(). */ | |
b30ab791 AG |
3034 | drbd_suspend_io(device); |
3035 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
b5043c5e | 3036 | drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work); |
194bfb32 | 3037 | |
0b2dafcd PR |
3038 | /* If we happen to be C_STANDALONE R_SECONDARY, just change to |
3039 | * D_INCONSISTENT, and set all bits in the bitmap. Otherwise, | |
3040 | * try to start a resync handshake as sync target for full sync. | |
9376d9f8 | 3041 | */ |
b30ab791 AG |
3042 | if (device->state.conn == C_STANDALONE && device->state.role == R_SECONDARY) { |
3043 | retcode = drbd_request_state(device, NS(disk, D_INCONSISTENT)); | |
0b2dafcd | 3044 | if (retcode >= SS_SUCCESS) { |
b30ab791 | 3045 | if (drbd_bitmap_io(device, &drbd_bmio_set_n_write, |
0b2dafcd PR |
3046 | "set_n_write from invalidate", BM_LOCKED_MASK)) |
3047 | retcode = ERR_IO_MD_DISK; | |
3048 | } | |
3049 | } else | |
b30ab791 AG |
3050 | retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_T)); |
3051 | drbd_resume_io(device); | |
9e276872 | 3052 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
8fe39aac | 3053 | put_ldev(device); |
3b98c0c2 | 3054 | out: |
a910b123 | 3055 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3056 | return 0; |
3057 | } | |
3058 | ||
3b98c0c2 LE |
3059 | static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, |
3060 | union drbd_state mask, union drbd_state val) | |
b411b363 | 3061 | { |
a910b123 | 3062 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 3063 | enum drbd_ret_code retcode; |
194bfb32 | 3064 | |
a910b123 | 3065 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3066 | if (!adm_ctx.reply_skb) |
3067 | return retcode; | |
3068 | if (retcode != NO_ERROR) | |
3069 | goto out; | |
b411b363 | 3070 | |
9e276872 | 3071 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 3072 | retcode = drbd_request_state(adm_ctx.device, mask, val); |
9e276872 | 3073 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3074 | out: |
a910b123 | 3075 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3076 | return 0; |
3077 | } | |
3078 | ||
8fe39aac | 3079 | static int drbd_bmio_set_susp_al(struct drbd_device *device) __must_hold(local) |
0778286a PR |
3080 | { |
3081 | int rv; | |
3082 | ||
b30ab791 AG |
3083 | rv = drbd_bmio_set_n_write(device); |
3084 | drbd_suspend_al(device); | |
0778286a PR |
3085 | return rv; |
3086 | } | |
3087 | ||
3b98c0c2 | 3088 | int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3089 | { |
a910b123 | 3090 | struct drbd_config_context adm_ctx; |
25b0d6c8 | 3091 | int retcode; /* drbd_ret_code, drbd_state_rv */ |
b30ab791 | 3092 | struct drbd_device *device; |
25b0d6c8 | 3093 | |
a910b123 | 3094 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
25b0d6c8 PR |
3095 | if (!adm_ctx.reply_skb) |
3096 | return retcode; | |
3097 | if (retcode != NO_ERROR) | |
3098 | goto out; | |
3099 | ||
b30ab791 | 3100 | device = adm_ctx.device; |
8fe39aac PR |
3101 | if (!get_ldev(device)) { |
3102 | retcode = ERR_NO_DISK; | |
3103 | goto out; | |
3104 | } | |
3105 | ||
3106 | mutex_lock(&adm_ctx.resource->adm_mutex); | |
b411b363 | 3107 | |
194bfb32 | 3108 | /* If there is still bitmap IO pending, probably because of a previous |
7ee1fb93 LE |
3109 | * resync just being finished, wait for it before requesting a new resync. |
3110 | * Also wait for it's after_state_ch(). */ | |
b30ab791 AG |
3111 | drbd_suspend_io(device); |
3112 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
b5043c5e | 3113 | drbd_flush_workqueue(&first_peer_device(device)->connection->sender_work); |
194bfb32 | 3114 | |
0b2dafcd PR |
3115 | /* If we happen to be C_STANDALONE R_PRIMARY, just set all bits |
3116 | * in the bitmap. Otherwise, try to start a resync handshake | |
3117 | * as sync source for full sync. | |
3118 | */ | |
b30ab791 | 3119 | if (device->state.conn == C_STANDALONE && device->state.role == R_PRIMARY) { |
0b2dafcd PR |
3120 | /* The peer will get a resync upon connect anyways. Just make that |
3121 | into a full resync. */ | |
b30ab791 | 3122 | retcode = drbd_request_state(device, NS(pdsk, D_INCONSISTENT)); |
0b2dafcd | 3123 | if (retcode >= SS_SUCCESS) { |
b30ab791 | 3124 | if (drbd_bitmap_io(device, &drbd_bmio_set_susp_al, |
0b2dafcd PR |
3125 | "set_n_write from invalidate_peer", |
3126 | BM_LOCKED_SET_ALLOWED)) | |
3127 | retcode = ERR_IO_MD_DISK; | |
3128 | } | |
3129 | } else | |
b30ab791 AG |
3130 | retcode = drbd_request_state(device, NS(conn, C_STARTING_SYNC_S)); |
3131 | drbd_resume_io(device); | |
9e276872 | 3132 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
8fe39aac | 3133 | put_ldev(device); |
25b0d6c8 | 3134 | out: |
a910b123 | 3135 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3136 | return 0; |
3137 | } | |
3138 | ||
3b98c0c2 | 3139 | int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3140 | { |
a910b123 | 3141 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 3142 | enum drbd_ret_code retcode; |
b411b363 | 3143 | |
a910b123 | 3144 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3145 | if (!adm_ctx.reply_skb) |
3146 | return retcode; | |
3147 | if (retcode != NO_ERROR) | |
3148 | goto out; | |
b411b363 | 3149 | |
9e276872 | 3150 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 3151 | if (drbd_request_state(adm_ctx.device, NS(user_isp, 1)) == SS_NOTHING_TO_DO) |
3b98c0c2 | 3152 | retcode = ERR_PAUSE_IS_SET; |
9e276872 | 3153 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3154 | out: |
a910b123 | 3155 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3156 | return 0; |
3157 | } | |
3158 | ||
3b98c0c2 | 3159 | int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3160 | { |
a910b123 | 3161 | struct drbd_config_context adm_ctx; |
da9fbc27 | 3162 | union drbd_dev_state s; |
3b98c0c2 LE |
3163 | enum drbd_ret_code retcode; |
3164 | ||
a910b123 | 3165 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3166 | if (!adm_ctx.reply_skb) |
3167 | return retcode; | |
3168 | if (retcode != NO_ERROR) | |
3169 | goto out; | |
b411b363 | 3170 | |
9e276872 | 3171 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
3172 | if (drbd_request_state(adm_ctx.device, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { |
3173 | s = adm_ctx.device->state; | |
cd88d030 PR |
3174 | if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) { |
3175 | retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP : | |
3176 | s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR; | |
3177 | } else { | |
3178 | retcode = ERR_PAUSE_IS_CLEAR; | |
3179 | } | |
3180 | } | |
9e276872 | 3181 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3182 | out: |
a910b123 | 3183 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3184 | return 0; |
3185 | } | |
3186 | ||
3b98c0c2 | 3187 | int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3188 | { |
3b98c0c2 | 3189 | return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); |
b411b363 PR |
3190 | } |
3191 | ||
3b98c0c2 | 3192 | int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3193 | { |
a910b123 | 3194 | struct drbd_config_context adm_ctx; |
b30ab791 | 3195 | struct drbd_device *device; |
3b98c0c2 LE |
3196 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
3197 | ||
a910b123 | 3198 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3199 | if (!adm_ctx.reply_skb) |
3200 | return retcode; | |
3201 | if (retcode != NO_ERROR) | |
3202 | goto out; | |
3203 | ||
9e276872 | 3204 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 AG |
3205 | device = adm_ctx.device; |
3206 | if (test_bit(NEW_CUR_UUID, &device->flags)) { | |
9fa48269 LE |
3207 | if (get_ldev_if_state(device, D_ATTACHING)) { |
3208 | drbd_uuid_new_current(device); | |
3209 | put_ldev(device); | |
3210 | } else { | |
3211 | /* This is effectively a multi-stage "forced down". | |
3212 | * The NEW_CUR_UUID bit is supposedly only set, if we | |
3213 | * lost the replication connection, and are configured | |
3214 | * to freeze IO and wait for some fence-peer handler. | |
3215 | * So we still don't have a replication connection. | |
3216 | * And now we don't have a local disk either. After | |
3217 | * resume, we will fail all pending and new IO, because | |
3218 | * we don't have any data anymore. Which means we will | |
3219 | * eventually be able to terminate all users of this | |
3220 | * device, and then take it down. By bumping the | |
3221 | * "effective" data uuid, we make sure that you really | |
3222 | * need to tear down before you reconfigure, we will | |
3223 | * the refuse to re-connect or re-attach (because no | |
3224 | * matching real data uuid exists). | |
3225 | */ | |
3226 | u64 val; | |
3227 | get_random_bytes(&val, sizeof(u64)); | |
3228 | drbd_set_ed_uuid(device, val); | |
3229 | drbd_warn(device, "Resumed without access to data; please tear down before attempting to re-configure.\n"); | |
3230 | } | |
b30ab791 | 3231 | clear_bit(NEW_CUR_UUID, &device->flags); |
43a5182c | 3232 | } |
b30ab791 AG |
3233 | drbd_suspend_io(device); |
3234 | retcode = drbd_request_state(device, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); | |
3b98c0c2 | 3235 | if (retcode == SS_SUCCESS) { |
b30ab791 | 3236 | if (device->state.conn < C_CONNECTED) |
a6b32bc3 | 3237 | tl_clear(first_peer_device(device)->connection); |
b30ab791 | 3238 | if (device->state.disk == D_DISKLESS || device->state.disk == D_FAILED) |
a6b32bc3 | 3239 | tl_restart(first_peer_device(device)->connection, FAIL_FROZEN_DISK_IO); |
265be2d0 | 3240 | } |
b30ab791 | 3241 | drbd_resume_io(device); |
9e276872 | 3242 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 3243 | out: |
a910b123 | 3244 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
3245 | return 0; |
3246 | } | |
3247 | ||
3b98c0c2 | 3248 | int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3249 | { |
3b98c0c2 | 3250 | return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); |
b411b363 PR |
3251 | } |
3252 | ||
251b8f8e AG |
3253 | static int nla_put_drbd_cfg_context(struct sk_buff *skb, |
3254 | struct drbd_resource *resource, | |
3255 | struct drbd_connection *connection, | |
3256 | struct drbd_device *device) | |
b411b363 | 3257 | { |
543cc10b | 3258 | struct nlattr *nla; |
ae0be8de | 3259 | nla = nla_nest_start_noflag(skb, DRBD_NLA_CFG_CONTEXT); |
543cc10b LE |
3260 | if (!nla) |
3261 | goto nla_put_failure; | |
251b8f8e AG |
3262 | if (device && |
3263 | nla_put_u32(skb, T_ctx_volume, device->vnr)) | |
26ec9287 | 3264 | goto nla_put_failure; |
f597f6b8 | 3265 | if (nla_put_string(skb, T_ctx_resource_name, resource->name)) |
26ec9287 | 3266 | goto nla_put_failure; |
251b8f8e AG |
3267 | if (connection) { |
3268 | if (connection->my_addr_len && | |
3269 | nla_put(skb, T_ctx_my_addr, connection->my_addr_len, &connection->my_addr)) | |
3270 | goto nla_put_failure; | |
3271 | if (connection->peer_addr_len && | |
3272 | nla_put(skb, T_ctx_peer_addr, connection->peer_addr_len, &connection->peer_addr)) | |
3273 | goto nla_put_failure; | |
3274 | } | |
543cc10b LE |
3275 | nla_nest_end(skb, nla); |
3276 | return 0; | |
b411b363 | 3277 | |
543cc10b LE |
3278 | nla_put_failure: |
3279 | if (nla) | |
3280 | nla_nest_cancel(skb, nla); | |
3281 | return -EMSGSIZE; | |
3282 | } | |
b411b363 | 3283 | |
a55bbd37 AG |
3284 | /* |
3285 | * The generic netlink dump callbacks are called outside the genl_lock(), so | |
3286 | * they cannot use the simple attribute parsing code which uses global | |
3287 | * attribute tables. | |
3288 | */ | |
3289 | static struct nlattr *find_cfg_context_attr(const struct nlmsghdr *nlh, int attr) | |
3290 | { | |
3291 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; | |
3292 | const int maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; | |
3293 | struct nlattr *nla; | |
3294 | ||
3295 | nla = nla_find(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen), | |
3296 | DRBD_NLA_CFG_CONTEXT); | |
3297 | if (!nla) | |
3298 | return NULL; | |
3299 | return drbd_nla_find_nested(maxtype, nla, __nla_type(attr)); | |
3300 | } | |
3301 | ||
3302 | static void resource_to_info(struct resource_info *, struct drbd_resource *); | |
3303 | ||
3304 | int drbd_adm_dump_resources(struct sk_buff *skb, struct netlink_callback *cb) | |
3305 | { | |
3306 | struct drbd_genlmsghdr *dh; | |
3307 | struct drbd_resource *resource; | |
3308 | struct resource_info resource_info; | |
3309 | struct resource_statistics resource_statistics; | |
3310 | int err; | |
3311 | ||
3312 | rcu_read_lock(); | |
3313 | if (cb->args[0]) { | |
3314 | for_each_resource_rcu(resource, &drbd_resources) | |
3315 | if (resource == (struct drbd_resource *)cb->args[0]) | |
3316 | goto found_resource; | |
3317 | err = 0; /* resource was probably deleted */ | |
3318 | goto out; | |
3319 | } | |
3320 | resource = list_entry(&drbd_resources, | |
3321 | struct drbd_resource, resources); | |
3322 | ||
3323 | found_resource: | |
3324 | list_for_each_entry_continue_rcu(resource, &drbd_resources, resources) { | |
3325 | goto put_result; | |
3326 | } | |
3327 | err = 0; | |
3328 | goto out; | |
3329 | ||
3330 | put_result: | |
3331 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3332 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3333 | NLM_F_MULTI, DRBD_ADM_GET_RESOURCES); | |
3334 | err = -ENOMEM; | |
3335 | if (!dh) | |
3336 | goto out; | |
3337 | dh->minor = -1U; | |
3338 | dh->ret_code = NO_ERROR; | |
3339 | err = nla_put_drbd_cfg_context(skb, resource, NULL, NULL); | |
3340 | if (err) | |
3341 | goto out; | |
3342 | err = res_opts_to_skb(skb, &resource->res_opts, !capable(CAP_SYS_ADMIN)); | |
3343 | if (err) | |
3344 | goto out; | |
3345 | resource_to_info(&resource_info, resource); | |
3346 | err = resource_info_to_skb(skb, &resource_info, !capable(CAP_SYS_ADMIN)); | |
3347 | if (err) | |
3348 | goto out; | |
3349 | resource_statistics.res_stat_write_ordering = resource->write_ordering; | |
3350 | err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN)); | |
3351 | if (err) | |
3352 | goto out; | |
3353 | cb->args[0] = (long)resource; | |
3354 | genlmsg_end(skb, dh); | |
3355 | err = 0; | |
3356 | ||
3357 | out: | |
3358 | rcu_read_unlock(); | |
3359 | if (err) | |
3360 | return err; | |
3361 | return skb->len; | |
3362 | } | |
3363 | ||
3364 | static void device_to_statistics(struct device_statistics *s, | |
3365 | struct drbd_device *device) | |
3366 | { | |
3367 | memset(s, 0, sizeof(*s)); | |
3368 | s->dev_upper_blocked = !may_inc_ap_bio(device); | |
3369 | if (get_ldev(device)) { | |
3370 | struct drbd_md *md = &device->ldev->md; | |
3371 | u64 *history_uuids = (u64 *)s->history_uuids; | |
3372 | struct request_queue *q; | |
3373 | int n; | |
3374 | ||
3375 | spin_lock_irq(&md->uuid_lock); | |
3376 | s->dev_current_uuid = md->uuid[UI_CURRENT]; | |
3377 | BUILD_BUG_ON(sizeof(s->history_uuids) < UI_HISTORY_END - UI_HISTORY_START + 1); | |
3378 | for (n = 0; n < UI_HISTORY_END - UI_HISTORY_START + 1; n++) | |
3379 | history_uuids[n] = md->uuid[UI_HISTORY_START + n]; | |
3380 | for (; n < HISTORY_UUIDS; n++) | |
3381 | history_uuids[n] = 0; | |
3382 | s->history_uuids_len = HISTORY_UUIDS; | |
3383 | spin_unlock_irq(&md->uuid_lock); | |
3384 | ||
3385 | s->dev_disk_flags = md->flags; | |
3386 | q = bdev_get_queue(device->ldev->backing_bdev); | |
3387 | s->dev_lower_blocked = | |
dc3b17cc | 3388 | bdi_congested(q->backing_dev_info, |
a55bbd37 AG |
3389 | (1 << WB_async_congested) | |
3390 | (1 << WB_sync_congested)); | |
3391 | put_ldev(device); | |
3392 | } | |
3393 | s->dev_size = drbd_get_capacity(device->this_bdev); | |
3394 | s->dev_read = device->read_cnt; | |
3395 | s->dev_write = device->writ_cnt; | |
3396 | s->dev_al_writes = device->al_writ_cnt; | |
3397 | s->dev_bm_writes = device->bm_writ_cnt; | |
3398 | s->dev_upper_pending = atomic_read(&device->ap_bio_cnt); | |
3399 | s->dev_lower_pending = atomic_read(&device->local_cnt); | |
3400 | s->dev_al_suspended = test_bit(AL_SUSPENDED, &device->flags); | |
3401 | s->dev_exposed_data_uuid = device->ed_uuid; | |
3402 | } | |
3403 | ||
3404 | static int put_resource_in_arg0(struct netlink_callback *cb, int holder_nr) | |
3405 | { | |
3406 | if (cb->args[0]) { | |
3407 | struct drbd_resource *resource = | |
3408 | (struct drbd_resource *)cb->args[0]; | |
3409 | kref_put(&resource->kref, drbd_destroy_resource); | |
3410 | } | |
3411 | ||
3412 | return 0; | |
3413 | } | |
3414 | ||
3415 | int drbd_adm_dump_devices_done(struct netlink_callback *cb) { | |
3416 | return put_resource_in_arg0(cb, 7); | |
3417 | } | |
3418 | ||
3419 | static void device_to_info(struct device_info *, struct drbd_device *); | |
3420 | ||
3421 | int drbd_adm_dump_devices(struct sk_buff *skb, struct netlink_callback *cb) | |
3422 | { | |
3423 | struct nlattr *resource_filter; | |
3424 | struct drbd_resource *resource; | |
3425 | struct drbd_device *uninitialized_var(device); | |
3426 | int minor, err, retcode; | |
3427 | struct drbd_genlmsghdr *dh; | |
3428 | struct device_info device_info; | |
3429 | struct device_statistics device_statistics; | |
3430 | struct idr *idr_to_search; | |
3431 | ||
3432 | resource = (struct drbd_resource *)cb->args[0]; | |
3433 | if (!cb->args[0] && !cb->args[1]) { | |
3434 | resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name); | |
3435 | if (resource_filter) { | |
3436 | retcode = ERR_RES_NOT_KNOWN; | |
3437 | resource = drbd_find_resource(nla_data(resource_filter)); | |
3438 | if (!resource) | |
3439 | goto put_result; | |
3440 | cb->args[0] = (long)resource; | |
3441 | } | |
3442 | } | |
3443 | ||
3444 | rcu_read_lock(); | |
3445 | minor = cb->args[1]; | |
3446 | idr_to_search = resource ? &resource->devices : &drbd_devices; | |
3447 | device = idr_get_next(idr_to_search, &minor); | |
3448 | if (!device) { | |
3449 | err = 0; | |
3450 | goto out; | |
3451 | } | |
3452 | idr_for_each_entry_continue(idr_to_search, device, minor) { | |
3453 | retcode = NO_ERROR; | |
3454 | goto put_result; /* only one iteration */ | |
3455 | } | |
3456 | err = 0; | |
3457 | goto out; /* no more devices */ | |
3458 | ||
3459 | put_result: | |
3460 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3461 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3462 | NLM_F_MULTI, DRBD_ADM_GET_DEVICES); | |
3463 | err = -ENOMEM; | |
3464 | if (!dh) | |
3465 | goto out; | |
3466 | dh->ret_code = retcode; | |
3467 | dh->minor = -1U; | |
3468 | if (retcode == NO_ERROR) { | |
3469 | dh->minor = device->minor; | |
3470 | err = nla_put_drbd_cfg_context(skb, device->resource, NULL, device); | |
3471 | if (err) | |
3472 | goto out; | |
3473 | if (get_ldev(device)) { | |
3474 | struct disk_conf *disk_conf = | |
3475 | rcu_dereference(device->ldev->disk_conf); | |
3476 | ||
3477 | err = disk_conf_to_skb(skb, disk_conf, !capable(CAP_SYS_ADMIN)); | |
3478 | put_ldev(device); | |
3479 | if (err) | |
3480 | goto out; | |
3481 | } | |
3482 | device_to_info(&device_info, device); | |
3483 | err = device_info_to_skb(skb, &device_info, !capable(CAP_SYS_ADMIN)); | |
3484 | if (err) | |
3485 | goto out; | |
3486 | ||
3487 | device_to_statistics(&device_statistics, device); | |
3488 | err = device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN)); | |
3489 | if (err) | |
3490 | goto out; | |
3491 | cb->args[1] = minor + 1; | |
3492 | } | |
3493 | genlmsg_end(skb, dh); | |
3494 | err = 0; | |
3495 | ||
3496 | out: | |
3497 | rcu_read_unlock(); | |
3498 | if (err) | |
3499 | return err; | |
3500 | return skb->len; | |
3501 | } | |
3502 | ||
3503 | int drbd_adm_dump_connections_done(struct netlink_callback *cb) | |
3504 | { | |
3505 | return put_resource_in_arg0(cb, 6); | |
3506 | } | |
3507 | ||
3508 | enum { SINGLE_RESOURCE, ITERATE_RESOURCES }; | |
3509 | ||
3510 | int drbd_adm_dump_connections(struct sk_buff *skb, struct netlink_callback *cb) | |
3511 | { | |
3512 | struct nlattr *resource_filter; | |
3513 | struct drbd_resource *resource = NULL, *next_resource; | |
3514 | struct drbd_connection *uninitialized_var(connection); | |
3515 | int err = 0, retcode; | |
3516 | struct drbd_genlmsghdr *dh; | |
3517 | struct connection_info connection_info; | |
3518 | struct connection_statistics connection_statistics; | |
3519 | ||
3520 | rcu_read_lock(); | |
3521 | resource = (struct drbd_resource *)cb->args[0]; | |
3522 | if (!cb->args[0]) { | |
3523 | resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name); | |
3524 | if (resource_filter) { | |
3525 | retcode = ERR_RES_NOT_KNOWN; | |
3526 | resource = drbd_find_resource(nla_data(resource_filter)); | |
3527 | if (!resource) | |
3528 | goto put_result; | |
3529 | cb->args[0] = (long)resource; | |
3530 | cb->args[1] = SINGLE_RESOURCE; | |
3531 | } | |
3532 | } | |
3533 | if (!resource) { | |
3534 | if (list_empty(&drbd_resources)) | |
3535 | goto out; | |
3536 | resource = list_first_entry(&drbd_resources, struct drbd_resource, resources); | |
3537 | kref_get(&resource->kref); | |
3538 | cb->args[0] = (long)resource; | |
3539 | cb->args[1] = ITERATE_RESOURCES; | |
3540 | } | |
3541 | ||
3542 | next_resource: | |
3543 | rcu_read_unlock(); | |
3544 | mutex_lock(&resource->conf_update); | |
3545 | rcu_read_lock(); | |
3546 | if (cb->args[2]) { | |
3547 | for_each_connection_rcu(connection, resource) | |
3548 | if (connection == (struct drbd_connection *)cb->args[2]) | |
3549 | goto found_connection; | |
3550 | /* connection was probably deleted */ | |
3551 | goto no_more_connections; | |
3552 | } | |
3553 | connection = list_entry(&resource->connections, struct drbd_connection, connections); | |
3554 | ||
3555 | found_connection: | |
3556 | list_for_each_entry_continue_rcu(connection, &resource->connections, connections) { | |
3557 | if (!has_net_conf(connection)) | |
3558 | continue; | |
3559 | retcode = NO_ERROR; | |
3560 | goto put_result; /* only one iteration */ | |
3561 | } | |
3562 | ||
3563 | no_more_connections: | |
3564 | if (cb->args[1] == ITERATE_RESOURCES) { | |
3565 | for_each_resource_rcu(next_resource, &drbd_resources) { | |
3566 | if (next_resource == resource) | |
3567 | goto found_resource; | |
3568 | } | |
3569 | /* resource was probably deleted */ | |
3570 | } | |
3571 | goto out; | |
3572 | ||
3573 | found_resource: | |
3574 | list_for_each_entry_continue_rcu(next_resource, &drbd_resources, resources) { | |
3575 | mutex_unlock(&resource->conf_update); | |
3576 | kref_put(&resource->kref, drbd_destroy_resource); | |
3577 | resource = next_resource; | |
3578 | kref_get(&resource->kref); | |
3579 | cb->args[0] = (long)resource; | |
3580 | cb->args[2] = 0; | |
3581 | goto next_resource; | |
3582 | } | |
3583 | goto out; /* no more resources */ | |
3584 | ||
3585 | put_result: | |
3586 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3587 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3588 | NLM_F_MULTI, DRBD_ADM_GET_CONNECTIONS); | |
3589 | err = -ENOMEM; | |
3590 | if (!dh) | |
3591 | goto out; | |
3592 | dh->ret_code = retcode; | |
3593 | dh->minor = -1U; | |
3594 | if (retcode == NO_ERROR) { | |
3595 | struct net_conf *net_conf; | |
3596 | ||
3597 | err = nla_put_drbd_cfg_context(skb, resource, connection, NULL); | |
3598 | if (err) | |
3599 | goto out; | |
3600 | net_conf = rcu_dereference(connection->net_conf); | |
3601 | if (net_conf) { | |
3602 | err = net_conf_to_skb(skb, net_conf, !capable(CAP_SYS_ADMIN)); | |
3603 | if (err) | |
3604 | goto out; | |
3605 | } | |
3606 | connection_to_info(&connection_info, connection); | |
3607 | err = connection_info_to_skb(skb, &connection_info, !capable(CAP_SYS_ADMIN)); | |
3608 | if (err) | |
3609 | goto out; | |
3610 | connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags); | |
3611 | err = connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN)); | |
3612 | if (err) | |
3613 | goto out; | |
3614 | cb->args[2] = (long)connection; | |
3615 | } | |
3616 | genlmsg_end(skb, dh); | |
3617 | err = 0; | |
3618 | ||
3619 | out: | |
3620 | rcu_read_unlock(); | |
3621 | if (resource) | |
3622 | mutex_unlock(&resource->conf_update); | |
3623 | if (err) | |
3624 | return err; | |
3625 | return skb->len; | |
3626 | } | |
3627 | ||
3628 | enum mdf_peer_flag { | |
3629 | MDF_PEER_CONNECTED = 1 << 0, | |
3630 | MDF_PEER_OUTDATED = 1 << 1, | |
3631 | MDF_PEER_FENCING = 1 << 2, | |
3632 | MDF_PEER_FULL_SYNC = 1 << 3, | |
3633 | }; | |
3634 | ||
3635 | static void peer_device_to_statistics(struct peer_device_statistics *s, | |
3636 | struct drbd_peer_device *peer_device) | |
3637 | { | |
3638 | struct drbd_device *device = peer_device->device; | |
3639 | ||
3640 | memset(s, 0, sizeof(*s)); | |
3641 | s->peer_dev_received = device->recv_cnt; | |
3642 | s->peer_dev_sent = device->send_cnt; | |
3643 | s->peer_dev_pending = atomic_read(&device->ap_pending_cnt) + | |
3644 | atomic_read(&device->rs_pending_cnt); | |
3645 | s->peer_dev_unacked = atomic_read(&device->unacked_cnt); | |
3646 | s->peer_dev_out_of_sync = drbd_bm_total_weight(device) << (BM_BLOCK_SHIFT - 9); | |
3647 | s->peer_dev_resync_failed = device->rs_failed << (BM_BLOCK_SHIFT - 9); | |
3648 | if (get_ldev(device)) { | |
3649 | struct drbd_md *md = &device->ldev->md; | |
3650 | ||
3651 | spin_lock_irq(&md->uuid_lock); | |
3652 | s->peer_dev_bitmap_uuid = md->uuid[UI_BITMAP]; | |
3653 | spin_unlock_irq(&md->uuid_lock); | |
3654 | s->peer_dev_flags = | |
3655 | (drbd_md_test_flag(device->ldev, MDF_CONNECTED_IND) ? | |
3656 | MDF_PEER_CONNECTED : 0) + | |
3657 | (drbd_md_test_flag(device->ldev, MDF_CONSISTENT) && | |
3658 | !drbd_md_test_flag(device->ldev, MDF_WAS_UP_TO_DATE) ? | |
3659 | MDF_PEER_OUTDATED : 0) + | |
3660 | /* FIXME: MDF_PEER_FENCING? */ | |
3661 | (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC) ? | |
3662 | MDF_PEER_FULL_SYNC : 0); | |
3663 | put_ldev(device); | |
3664 | } | |
3665 | } | |
3666 | ||
3667 | int drbd_adm_dump_peer_devices_done(struct netlink_callback *cb) | |
3668 | { | |
3669 | return put_resource_in_arg0(cb, 9); | |
3670 | } | |
3671 | ||
3672 | int drbd_adm_dump_peer_devices(struct sk_buff *skb, struct netlink_callback *cb) | |
3673 | { | |
3674 | struct nlattr *resource_filter; | |
3675 | struct drbd_resource *resource; | |
3676 | struct drbd_device *uninitialized_var(device); | |
3677 | struct drbd_peer_device *peer_device = NULL; | |
3678 | int minor, err, retcode; | |
3679 | struct drbd_genlmsghdr *dh; | |
3680 | struct idr *idr_to_search; | |
3681 | ||
3682 | resource = (struct drbd_resource *)cb->args[0]; | |
3683 | if (!cb->args[0] && !cb->args[1]) { | |
3684 | resource_filter = find_cfg_context_attr(cb->nlh, T_ctx_resource_name); | |
3685 | if (resource_filter) { | |
3686 | retcode = ERR_RES_NOT_KNOWN; | |
3687 | resource = drbd_find_resource(nla_data(resource_filter)); | |
3688 | if (!resource) | |
3689 | goto put_result; | |
3690 | } | |
3691 | cb->args[0] = (long)resource; | |
3692 | } | |
3693 | ||
3694 | rcu_read_lock(); | |
3695 | minor = cb->args[1]; | |
3696 | idr_to_search = resource ? &resource->devices : &drbd_devices; | |
3697 | device = idr_find(idr_to_search, minor); | |
3698 | if (!device) { | |
3699 | next_device: | |
3700 | minor++; | |
3701 | cb->args[2] = 0; | |
3702 | device = idr_get_next(idr_to_search, &minor); | |
3703 | if (!device) { | |
3704 | err = 0; | |
3705 | goto out; | |
3706 | } | |
3707 | } | |
3708 | if (cb->args[2]) { | |
3709 | for_each_peer_device(peer_device, device) | |
3710 | if (peer_device == (struct drbd_peer_device *)cb->args[2]) | |
3711 | goto found_peer_device; | |
3712 | /* peer device was probably deleted */ | |
3713 | goto next_device; | |
3714 | } | |
3715 | /* Make peer_device point to the list head (not the first entry). */ | |
3716 | peer_device = list_entry(&device->peer_devices, struct drbd_peer_device, peer_devices); | |
3717 | ||
3718 | found_peer_device: | |
3719 | list_for_each_entry_continue_rcu(peer_device, &device->peer_devices, peer_devices) { | |
3720 | if (!has_net_conf(peer_device->connection)) | |
3721 | continue; | |
3722 | retcode = NO_ERROR; | |
3723 | goto put_result; /* only one iteration */ | |
3724 | } | |
3725 | goto next_device; | |
3726 | ||
3727 | put_result: | |
3728 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
3729 | cb->nlh->nlmsg_seq, &drbd_genl_family, | |
3730 | NLM_F_MULTI, DRBD_ADM_GET_PEER_DEVICES); | |
3731 | err = -ENOMEM; | |
3732 | if (!dh) | |
3733 | goto out; | |
3734 | dh->ret_code = retcode; | |
3735 | dh->minor = -1U; | |
3736 | if (retcode == NO_ERROR) { | |
3737 | struct peer_device_info peer_device_info; | |
3738 | struct peer_device_statistics peer_device_statistics; | |
3739 | ||
3740 | dh->minor = minor; | |
3741 | err = nla_put_drbd_cfg_context(skb, device->resource, peer_device->connection, device); | |
3742 | if (err) | |
3743 | goto out; | |
3744 | peer_device_to_info(&peer_device_info, peer_device); | |
3745 | err = peer_device_info_to_skb(skb, &peer_device_info, !capable(CAP_SYS_ADMIN)); | |
3746 | if (err) | |
3747 | goto out; | |
3748 | peer_device_to_statistics(&peer_device_statistics, peer_device); | |
3749 | err = peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN)); | |
3750 | if (err) | |
3751 | goto out; | |
3752 | cb->args[1] = minor; | |
3753 | cb->args[2] = (long)peer_device; | |
3754 | } | |
3755 | genlmsg_end(skb, dh); | |
3756 | err = 0; | |
3757 | ||
3758 | out: | |
3759 | rcu_read_unlock(); | |
3760 | if (err) | |
3761 | return err; | |
3762 | return skb->len; | |
3763 | } | |
251b8f8e AG |
3764 | /* |
3765 | * Return the connection of @resource if @resource has exactly one connection. | |
3766 | */ | |
3767 | static struct drbd_connection *the_only_connection(struct drbd_resource *resource) | |
3768 | { | |
3769 | struct list_head *connections = &resource->connections; | |
3770 | ||
3771 | if (list_empty(connections) || connections->next->next != connections) | |
3772 | return NULL; | |
3773 | return list_first_entry(&resource->connections, struct drbd_connection, connections); | |
3774 | } | |
3775 | ||
8ce953aa | 3776 | static int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device, |
3b98c0c2 | 3777 | const struct sib_info *sib) |
b411b363 | 3778 | { |
251b8f8e | 3779 | struct drbd_resource *resource = device->resource; |
3b98c0c2 LE |
3780 | struct state_info *si = NULL; /* for sizeof(si->member); */ |
3781 | struct nlattr *nla; | |
3782 | int got_ldev; | |
3b98c0c2 LE |
3783 | int err = 0; |
3784 | int exclude_sensitive; | |
3785 | ||
3786 | /* If sib != NULL, this is drbd_bcast_event, which anyone can listen | |
3787 | * to. So we better exclude_sensitive information. | |
3788 | * | |
3789 | * If sib == NULL, this is drbd_adm_get_status, executed synchronously | |
3790 | * in the context of the requesting user process. Exclude sensitive | |
3791 | * information, unless current has superuser. | |
3792 | * | |
3793 | * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and | |
3794 | * relies on the current implementation of netlink_dump(), which | |
3795 | * executes the dump callback successively from netlink_recvmsg(), | |
3796 | * always in the context of the receiving process */ | |
3797 | exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); | |
3798 | ||
b30ab791 | 3799 | got_ldev = get_ldev(device); |
3b98c0c2 LE |
3800 | |
3801 | /* We need to add connection name and volume number information still. | |
3802 | * Minor number is in drbd_genlmsghdr. */ | |
251b8f8e | 3803 | if (nla_put_drbd_cfg_context(skb, resource, the_only_connection(resource), device)) |
3b98c0c2 | 3804 | goto nla_put_failure; |
3b98c0c2 | 3805 | |
eb6bea67 | 3806 | if (res_opts_to_skb(skb, &device->resource->res_opts, exclude_sensitive)) |
f399002e LE |
3807 | goto nla_put_failure; |
3808 | ||
daeda1cc | 3809 | rcu_read_lock(); |
f9eb7bf4 AG |
3810 | if (got_ldev) { |
3811 | struct disk_conf *disk_conf; | |
44ed167d | 3812 | |
b30ab791 | 3813 | disk_conf = rcu_dereference(device->ldev->disk_conf); |
f9eb7bf4 AG |
3814 | err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive); |
3815 | } | |
3816 | if (!err) { | |
3817 | struct net_conf *nc; | |
3818 | ||
a6b32bc3 | 3819 | nc = rcu_dereference(first_peer_device(device)->connection->net_conf); |
f9eb7bf4 AG |
3820 | if (nc) |
3821 | err = net_conf_to_skb(skb, nc, exclude_sensitive); | |
3822 | } | |
44ed167d PR |
3823 | rcu_read_unlock(); |
3824 | if (err) | |
3825 | goto nla_put_failure; | |
3b98c0c2 | 3826 | |
ae0be8de | 3827 | nla = nla_nest_start_noflag(skb, DRBD_NLA_STATE_INFO); |
3b98c0c2 LE |
3828 | if (!nla) |
3829 | goto nla_put_failure; | |
26ec9287 | 3830 | if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY) || |
b30ab791 | 3831 | nla_put_u32(skb, T_current_state, device->state.i) || |
1dee3f59 ND |
3832 | nla_put_u64_0pad(skb, T_ed_uuid, device->ed_uuid) || |
3833 | nla_put_u64_0pad(skb, T_capacity, | |
3834 | drbd_get_capacity(device->this_bdev)) || | |
3835 | nla_put_u64_0pad(skb, T_send_cnt, device->send_cnt) || | |
3836 | nla_put_u64_0pad(skb, T_recv_cnt, device->recv_cnt) || | |
3837 | nla_put_u64_0pad(skb, T_read_cnt, device->read_cnt) || | |
3838 | nla_put_u64_0pad(skb, T_writ_cnt, device->writ_cnt) || | |
3839 | nla_put_u64_0pad(skb, T_al_writ_cnt, device->al_writ_cnt) || | |
3840 | nla_put_u64_0pad(skb, T_bm_writ_cnt, device->bm_writ_cnt) || | |
b30ab791 AG |
3841 | nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&device->ap_bio_cnt)) || |
3842 | nla_put_u32(skb, T_ap_pending_cnt, atomic_read(&device->ap_pending_cnt)) || | |
3843 | nla_put_u32(skb, T_rs_pending_cnt, atomic_read(&device->rs_pending_cnt))) | |
26ec9287 | 3844 | goto nla_put_failure; |
3b98c0c2 LE |
3845 | |
3846 | if (got_ldev) { | |
39a1aa7f | 3847 | int err; |
b411b363 | 3848 | |
b30ab791 AG |
3849 | spin_lock_irq(&device->ldev->md.uuid_lock); |
3850 | err = nla_put(skb, T_uuids, sizeof(si->uuids), device->ldev->md.uuid); | |
3851 | spin_unlock_irq(&device->ldev->md.uuid_lock); | |
39a1aa7f PR |
3852 | |
3853 | if (err) | |
3854 | goto nla_put_failure; | |
3855 | ||
b30ab791 | 3856 | if (nla_put_u32(skb, T_disk_flags, device->ldev->md.flags) || |
1dee3f59 ND |
3857 | nla_put_u64_0pad(skb, T_bits_total, drbd_bm_bits(device)) || |
3858 | nla_put_u64_0pad(skb, T_bits_oos, | |
3859 | drbd_bm_total_weight(device))) | |
26ec9287 | 3860 | goto nla_put_failure; |
b30ab791 AG |
3861 | if (C_SYNC_SOURCE <= device->state.conn && |
3862 | C_PAUSED_SYNC_T >= device->state.conn) { | |
1dee3f59 ND |
3863 | if (nla_put_u64_0pad(skb, T_bits_rs_total, |
3864 | device->rs_total) || | |
3865 | nla_put_u64_0pad(skb, T_bits_rs_failed, | |
3866 | device->rs_failed)) | |
26ec9287 | 3867 | goto nla_put_failure; |
3b98c0c2 | 3868 | } |
b411b363 | 3869 | } |
b411b363 | 3870 | |
3b98c0c2 LE |
3871 | if (sib) { |
3872 | switch(sib->sib_reason) { | |
3873 | case SIB_SYNC_PROGRESS: | |
3874 | case SIB_GET_STATUS_REPLY: | |
3875 | break; | |
3876 | case SIB_STATE_CHANGE: | |
26ec9287 AG |
3877 | if (nla_put_u32(skb, T_prev_state, sib->os.i) || |
3878 | nla_put_u32(skb, T_new_state, sib->ns.i)) | |
3879 | goto nla_put_failure; | |
3b98c0c2 LE |
3880 | break; |
3881 | case SIB_HELPER_POST: | |
26ec9287 AG |
3882 | if (nla_put_u32(skb, T_helper_exit_code, |
3883 | sib->helper_exit_code)) | |
3884 | goto nla_put_failure; | |
3b98c0c2 LE |
3885 | /* fall through */ |
3886 | case SIB_HELPER_PRE: | |
26ec9287 AG |
3887 | if (nla_put_string(skb, T_helper, sib->helper_name)) |
3888 | goto nla_put_failure; | |
3b98c0c2 LE |
3889 | break; |
3890 | } | |
b411b363 | 3891 | } |
3b98c0c2 | 3892 | nla_nest_end(skb, nla); |
b411b363 | 3893 | |
3b98c0c2 LE |
3894 | if (0) |
3895 | nla_put_failure: | |
3896 | err = -EMSGSIZE; | |
3897 | if (got_ldev) | |
b30ab791 | 3898 | put_ldev(device); |
3b98c0c2 | 3899 | return err; |
b411b363 PR |
3900 | } |
3901 | ||
3b98c0c2 | 3902 | int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 3903 | { |
a910b123 | 3904 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
3905 | enum drbd_ret_code retcode; |
3906 | int err; | |
b411b363 | 3907 | |
a910b123 | 3908 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
3909 | if (!adm_ctx.reply_skb) |
3910 | return retcode; | |
3911 | if (retcode != NO_ERROR) | |
3912 | goto out; | |
b411b363 | 3913 | |
b30ab791 | 3914 | err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.device, NULL); |
3b98c0c2 LE |
3915 | if (err) { |
3916 | nlmsg_free(adm_ctx.reply_skb); | |
3917 | return err; | |
b411b363 | 3918 | } |
3b98c0c2 | 3919 | out: |
a910b123 | 3920 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 3921 | return 0; |
b411b363 PR |
3922 | } |
3923 | ||
4b7a530f | 3924 | static int get_one_status(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 3925 | { |
b30ab791 | 3926 | struct drbd_device *device; |
3b98c0c2 | 3927 | struct drbd_genlmsghdr *dh; |
77c556f6 AG |
3928 | struct drbd_resource *pos = (struct drbd_resource *)cb->args[0]; |
3929 | struct drbd_resource *resource = NULL; | |
77c556f6 | 3930 | struct drbd_resource *tmp; |
543cc10b LE |
3931 | unsigned volume = cb->args[1]; |
3932 | ||
3933 | /* Open coded, deferred, iteration: | |
77c556f6 | 3934 | * for_each_resource_safe(resource, tmp, &drbd_resources) { |
251b8f8e AG |
3935 | * connection = "first connection of resource or undefined"; |
3936 | * idr_for_each_entry(&resource->devices, device, i) { | |
543cc10b LE |
3937 | * ... |
3938 | * } | |
3939 | * } | |
77c556f6 | 3940 | * where resource is cb->args[0]; |
543cc10b LE |
3941 | * and i is cb->args[1]; |
3942 | * | |
71932efc LE |
3943 | * cb->args[2] indicates if we shall loop over all resources, |
3944 | * or just dump all volumes of a single resource. | |
3945 | * | |
3b98c0c2 LE |
3946 | * This may miss entries inserted after this dump started, |
3947 | * or entries deleted before they are reached. | |
543cc10b | 3948 | * |
b30ab791 | 3949 | * We need to make sure the device won't disappear while |
543cc10b LE |
3950 | * we are looking at it, and revalidate our iterators |
3951 | * on each iteration. | |
3952 | */ | |
b411b363 | 3953 | |
05a10ec7 | 3954 | /* synchronize with conn_create()/drbd_destroy_connection() */ |
c141ebda | 3955 | rcu_read_lock(); |
543cc10b | 3956 | /* revalidate iterator position */ |
77c556f6 | 3957 | for_each_resource_rcu(tmp, &drbd_resources) { |
543cc10b LE |
3958 | if (pos == NULL) { |
3959 | /* first iteration */ | |
3960 | pos = tmp; | |
77c556f6 | 3961 | resource = pos; |
543cc10b LE |
3962 | break; |
3963 | } | |
3964 | if (tmp == pos) { | |
77c556f6 | 3965 | resource = pos; |
543cc10b LE |
3966 | break; |
3967 | } | |
b411b363 | 3968 | } |
77c556f6 AG |
3969 | if (resource) { |
3970 | next_resource: | |
251b8f8e AG |
3971 | device = idr_get_next(&resource->devices, &volume); |
3972 | if (!device) { | |
77c556f6 AG |
3973 | /* No more volumes to dump on this resource. |
3974 | * Advance resource iterator. */ | |
3975 | pos = list_entry_rcu(resource->resources.next, | |
3976 | struct drbd_resource, resources); | |
3977 | /* Did we dump any volume of this resource yet? */ | |
543cc10b | 3978 | if (volume != 0) { |
71932efc LE |
3979 | /* If we reached the end of the list, |
3980 | * or only a single resource dump was requested, | |
3981 | * we are done. */ | |
77c556f6 | 3982 | if (&pos->resources == &drbd_resources || cb->args[2]) |
71932efc | 3983 | goto out; |
543cc10b | 3984 | volume = 0; |
77c556f6 AG |
3985 | resource = pos; |
3986 | goto next_resource; | |
543cc10b LE |
3987 | } |
3988 | } | |
3989 | ||
98683650 | 3990 | dh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, |
3b98c0c2 LE |
3991 | cb->nlh->nlmsg_seq, &drbd_genl_family, |
3992 | NLM_F_MULTI, DRBD_ADM_GET_STATUS); | |
3993 | if (!dh) | |
543cc10b LE |
3994 | goto out; |
3995 | ||
251b8f8e | 3996 | if (!device) { |
bde89a9e | 3997 | /* This is a connection without a single volume. |
367d675d LE |
3998 | * Suprisingly enough, it may have a network |
3999 | * configuration. */ | |
251b8f8e AG |
4000 | struct drbd_connection *connection; |
4001 | ||
543cc10b LE |
4002 | dh->minor = -1U; |
4003 | dh->ret_code = NO_ERROR; | |
251b8f8e AG |
4004 | connection = the_only_connection(resource); |
4005 | if (nla_put_drbd_cfg_context(skb, resource, connection, NULL)) | |
367d675d | 4006 | goto cancel; |
251b8f8e AG |
4007 | if (connection) { |
4008 | struct net_conf *nc; | |
4009 | ||
4010 | nc = rcu_dereference(connection->net_conf); | |
4011 | if (nc && net_conf_to_skb(skb, nc, 1) != 0) | |
4012 | goto cancel; | |
4013 | } | |
367d675d | 4014 | goto done; |
543cc10b | 4015 | } |
b411b363 | 4016 | |
0b0ba1ef | 4017 | D_ASSERT(device, device->vnr == volume); |
251b8f8e | 4018 | D_ASSERT(device, device->resource == resource); |
3b98c0c2 | 4019 | |
b30ab791 | 4020 | dh->minor = device_to_minor(device); |
3b98c0c2 LE |
4021 | dh->ret_code = NO_ERROR; |
4022 | ||
b30ab791 | 4023 | if (nla_put_status_info(skb, device, NULL)) { |
367d675d | 4024 | cancel: |
3b98c0c2 | 4025 | genlmsg_cancel(skb, dh); |
543cc10b | 4026 | goto out; |
3b98c0c2 | 4027 | } |
367d675d | 4028 | done: |
3b98c0c2 | 4029 | genlmsg_end(skb, dh); |
bde89a9e | 4030 | } |
b411b363 | 4031 | |
543cc10b | 4032 | out: |
c141ebda | 4033 | rcu_read_unlock(); |
543cc10b | 4034 | /* where to start the next iteration */ |
bde89a9e | 4035 | cb->args[0] = (long)pos; |
77c556f6 | 4036 | cb->args[1] = (pos == resource) ? volume + 1 : 0; |
b411b363 | 4037 | |
77c556f6 | 4038 | /* No more resources/volumes/minors found results in an empty skb. |
543cc10b | 4039 | * Which will terminate the dump. */ |
3b98c0c2 | 4040 | return skb->len; |
b411b363 PR |
4041 | } |
4042 | ||
71932efc LE |
4043 | /* |
4044 | * Request status of all resources, or of all volumes within a single resource. | |
4045 | * | |
4046 | * This is a dump, as the answer may not fit in a single reply skb otherwise. | |
4047 | * Which means we cannot use the family->attrbuf or other such members, because | |
4048 | * dump is NOT protected by the genl_lock(). During dump, we only have access | |
4049 | * to the incoming skb, and need to opencode "parsing" of the nlattr payload. | |
4050 | * | |
4051 | * Once things are setup properly, we call into get_one_status(). | |
b411b363 | 4052 | */ |
71932efc | 4053 | int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) |
b411b363 | 4054 | { |
71932efc LE |
4055 | const unsigned hdrlen = GENL_HDRLEN + GENL_MAGIC_FAMILY_HDRSZ; |
4056 | struct nlattr *nla; | |
7c3063cc | 4057 | const char *resource_name; |
4bc76048 | 4058 | struct drbd_resource *resource; |
7c3063cc | 4059 | int maxtype; |
71932efc LE |
4060 | |
4061 | /* Is this a followup call? */ | |
4062 | if (cb->args[0]) { | |
4063 | /* ... of a single resource dump, | |
4064 | * and the resource iterator has been advanced already? */ | |
4065 | if (cb->args[2] && cb->args[2] != cb->args[0]) | |
4066 | return 0; /* DONE. */ | |
4067 | goto dump; | |
4068 | } | |
4069 | ||
4070 | /* First call (from netlink_dump_start). We need to figure out | |
4071 | * which resource(s) the user wants us to dump. */ | |
4072 | nla = nla_find(nlmsg_attrdata(cb->nlh, hdrlen), | |
4073 | nlmsg_attrlen(cb->nlh, hdrlen), | |
4074 | DRBD_NLA_CFG_CONTEXT); | |
4075 | ||
4076 | /* No explicit context given. Dump all. */ | |
4077 | if (!nla) | |
4078 | goto dump; | |
7c3063cc AG |
4079 | maxtype = ARRAY_SIZE(drbd_cfg_context_nl_policy) - 1; |
4080 | nla = drbd_nla_find_nested(maxtype, nla, __nla_type(T_ctx_resource_name)); | |
4081 | if (IS_ERR(nla)) | |
4082 | return PTR_ERR(nla); | |
71932efc LE |
4083 | /* context given, but no name present? */ |
4084 | if (!nla) | |
4085 | return -EINVAL; | |
7c3063cc | 4086 | resource_name = nla_data(nla); |
4bc76048 AG |
4087 | if (!*resource_name) |
4088 | return -ENODEV; | |
4089 | resource = drbd_find_resource(resource_name); | |
4090 | if (!resource) | |
71932efc LE |
4091 | return -ENODEV; |
4092 | ||
4bc76048 | 4093 | kref_put(&resource->kref, drbd_destroy_resource); /* get_one_status() revalidates the resource */ |
0ace9dfa | 4094 | |
71932efc | 4095 | /* prime iterators, and set "filter" mode mark: |
bde89a9e | 4096 | * only dump this connection. */ |
4bc76048 | 4097 | cb->args[0] = (long)resource; |
71932efc | 4098 | /* cb->args[1] = 0; passed in this way. */ |
4bc76048 | 4099 | cb->args[2] = (long)resource; |
71932efc LE |
4100 | |
4101 | dump: | |
4102 | return get_one_status(skb, cb); | |
4103 | } | |
b411b363 | 4104 | |
3b98c0c2 | 4105 | int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4106 | { |
a910b123 | 4107 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
4108 | enum drbd_ret_code retcode; |
4109 | struct timeout_parms tp; | |
4110 | int err; | |
b411b363 | 4111 | |
a910b123 | 4112 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4113 | if (!adm_ctx.reply_skb) |
4114 | return retcode; | |
4115 | if (retcode != NO_ERROR) | |
4116 | goto out; | |
b411b363 | 4117 | |
3b98c0c2 | 4118 | tp.timeout_type = |
b30ab791 AG |
4119 | adm_ctx.device->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : |
4120 | test_bit(USE_DEGR_WFC_T, &adm_ctx.device->flags) ? UT_DEGRADED : | |
3b98c0c2 | 4121 | UT_DEFAULT; |
b411b363 | 4122 | |
3b98c0c2 LE |
4123 | err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); |
4124 | if (err) { | |
4125 | nlmsg_free(adm_ctx.reply_skb); | |
4126 | return err; | |
4127 | } | |
4128 | out: | |
a910b123 | 4129 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4130 | return 0; |
b411b363 PR |
4131 | } |
4132 | ||
3b98c0c2 | 4133 | int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4134 | { |
a910b123 | 4135 | struct drbd_config_context adm_ctx; |
b30ab791 | 4136 | struct drbd_device *device; |
3b98c0c2 | 4137 | enum drbd_ret_code retcode; |
58ffa580 | 4138 | struct start_ov_parms parms; |
b411b363 | 4139 | |
a910b123 | 4140 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4141 | if (!adm_ctx.reply_skb) |
4142 | return retcode; | |
4143 | if (retcode != NO_ERROR) | |
4144 | goto out; | |
873b0d5f | 4145 | |
b30ab791 | 4146 | device = adm_ctx.device; |
58ffa580 LE |
4147 | |
4148 | /* resume from last known position, if possible */ | |
b30ab791 | 4149 | parms.ov_start_sector = device->ov_start_sector; |
58ffa580 | 4150 | parms.ov_stop_sector = ULLONG_MAX; |
3b98c0c2 | 4151 | if (info->attrs[DRBD_NLA_START_OV_PARMS]) { |
f399002e | 4152 | int err = start_ov_parms_from_attrs(&parms, info); |
3b98c0c2 LE |
4153 | if (err) { |
4154 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 4155 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
4156 | goto out; |
4157 | } | |
b411b363 | 4158 | } |
9e276872 LE |
4159 | mutex_lock(&adm_ctx.resource->adm_mutex); |
4160 | ||
58ffa580 | 4161 | /* w_make_ov_request expects position to be aligned */ |
b30ab791 AG |
4162 | device->ov_start_sector = parms.ov_start_sector & ~(BM_SECT_PER_BIT-1); |
4163 | device->ov_stop_sector = parms.ov_stop_sector; | |
873b0d5f LE |
4164 | |
4165 | /* If there is still bitmap IO pending, e.g. previous resync or verify | |
4166 | * just being finished, wait for it before requesting a new resync. */ | |
b30ab791 AG |
4167 | drbd_suspend_io(device); |
4168 | wait_event(device->misc_wait, !test_bit(BITMAP_IO, &device->flags)); | |
4169 | retcode = drbd_request_state(device, NS(conn, C_VERIFY_S)); | |
4170 | drbd_resume_io(device); | |
9e276872 LE |
4171 | |
4172 | mutex_unlock(&adm_ctx.resource->adm_mutex); | |
3b98c0c2 | 4173 | out: |
a910b123 | 4174 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
4175 | return 0; |
4176 | } | |
4177 | ||
4178 | ||
3b98c0c2 | 4179 | int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4180 | { |
a910b123 | 4181 | struct drbd_config_context adm_ctx; |
b30ab791 | 4182 | struct drbd_device *device; |
3b98c0c2 | 4183 | enum drbd_ret_code retcode; |
b411b363 PR |
4184 | int skip_initial_sync = 0; |
4185 | int err; | |
3b98c0c2 | 4186 | struct new_c_uuid_parms args; |
b411b363 | 4187 | |
a910b123 | 4188 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4189 | if (!adm_ctx.reply_skb) |
4190 | return retcode; | |
4191 | if (retcode != NO_ERROR) | |
4192 | goto out_nolock; | |
b411b363 | 4193 | |
b30ab791 | 4194 | device = adm_ctx.device; |
3b98c0c2 LE |
4195 | memset(&args, 0, sizeof(args)); |
4196 | if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { | |
f399002e | 4197 | err = new_c_uuid_parms_from_attrs(&args, info); |
3b98c0c2 LE |
4198 | if (err) { |
4199 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 4200 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
3b98c0c2 LE |
4201 | goto out_nolock; |
4202 | } | |
b411b363 PR |
4203 | } |
4204 | ||
9e276872 | 4205 | mutex_lock(&adm_ctx.resource->adm_mutex); |
b30ab791 | 4206 | mutex_lock(device->state_mutex); /* Protects us against serialized state changes. */ |
b411b363 | 4207 | |
b30ab791 | 4208 | if (!get_ldev(device)) { |
b411b363 PR |
4209 | retcode = ERR_NO_DISK; |
4210 | goto out; | |
4211 | } | |
4212 | ||
4213 | /* this is "skip initial sync", assume to be clean */ | |
a6b32bc3 AG |
4214 | if (device->state.conn == C_CONNECTED && |
4215 | first_peer_device(device)->connection->agreed_pro_version >= 90 && | |
b30ab791 | 4216 | device->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) { |
d0180171 | 4217 | drbd_info(device, "Preparing to skip initial sync\n"); |
b411b363 | 4218 | skip_initial_sync = 1; |
b30ab791 | 4219 | } else if (device->state.conn != C_STANDALONE) { |
b411b363 PR |
4220 | retcode = ERR_CONNECTED; |
4221 | goto out_dec; | |
4222 | } | |
4223 | ||
b30ab791 AG |
4224 | drbd_uuid_set(device, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */ |
4225 | drbd_uuid_new_current(device); /* New current, previous to UI_BITMAP */ | |
b411b363 PR |
4226 | |
4227 | if (args.clear_bm) { | |
b30ab791 | 4228 | err = drbd_bitmap_io(device, &drbd_bmio_clear_n_write, |
20ceb2b2 | 4229 | "clear_n_write from new_c_uuid", BM_LOCKED_MASK); |
b411b363 | 4230 | if (err) { |
d0180171 | 4231 | drbd_err(device, "Writing bitmap failed with %d\n", err); |
b411b363 PR |
4232 | retcode = ERR_IO_MD_DISK; |
4233 | } | |
4234 | if (skip_initial_sync) { | |
69a22773 | 4235 | drbd_send_uuids_skip_initial_sync(first_peer_device(device)); |
b30ab791 AG |
4236 | _drbd_uuid_set(device, UI_BITMAP, 0); |
4237 | drbd_print_uuids(device, "cleared bitmap UUID"); | |
0500813f | 4238 | spin_lock_irq(&device->resource->req_lock); |
b30ab791 | 4239 | _drbd_set_state(_NS2(device, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), |
b411b363 | 4240 | CS_VERBOSE, NULL); |
0500813f | 4241 | spin_unlock_irq(&device->resource->req_lock); |
b411b363 PR |
4242 | } |
4243 | } | |
4244 | ||
b30ab791 | 4245 | drbd_md_sync(device); |
b411b363 | 4246 | out_dec: |
b30ab791 | 4247 | put_ldev(device); |
b411b363 | 4248 | out: |
b30ab791 | 4249 | mutex_unlock(device->state_mutex); |
9e276872 | 4250 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 4251 | out_nolock: |
a910b123 | 4252 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
4253 | return 0; |
4254 | } | |
4255 | ||
3b98c0c2 | 4256 | static enum drbd_ret_code |
a910b123 | 4257 | drbd_check_resource_name(struct drbd_config_context *adm_ctx) |
b411b363 | 4258 | { |
a910b123 | 4259 | const char *name = adm_ctx->resource_name; |
3b98c0c2 | 4260 | if (!name || !name[0]) { |
a910b123 | 4261 | drbd_msg_put_info(adm_ctx->reply_skb, "resource name missing"); |
3b98c0c2 | 4262 | return ERR_MANDATORY_TAG; |
b411b363 | 4263 | } |
3b98c0c2 LE |
4264 | /* if we want to use these in sysfs/configfs/debugfs some day, |
4265 | * we must not allow slashes */ | |
4266 | if (strchr(name, '/')) { | |
a910b123 | 4267 | drbd_msg_put_info(adm_ctx->reply_skb, "invalid resource name"); |
3b98c0c2 | 4268 | return ERR_INVALID_REQUEST; |
b411b363 | 4269 | } |
3b98c0c2 | 4270 | return NO_ERROR; |
774b3055 | 4271 | } |
b411b363 | 4272 | |
a2972846 AG |
4273 | static void resource_to_info(struct resource_info *info, |
4274 | struct drbd_resource *resource) | |
4275 | { | |
4276 | info->res_role = conn_highest_role(first_connection(resource)); | |
4277 | info->res_susp = resource->susp; | |
4278 | info->res_susp_nod = resource->susp_nod; | |
4279 | info->res_susp_fen = resource->susp_fen; | |
4280 | } | |
4281 | ||
789c1b62 | 4282 | int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4283 | { |
a2972846 | 4284 | struct drbd_connection *connection; |
a910b123 | 4285 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 4286 | enum drbd_ret_code retcode; |
afbbfa88 AG |
4287 | struct res_opts res_opts; |
4288 | int err; | |
b411b363 | 4289 | |
a910b123 | 4290 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, 0); |
3b98c0c2 LE |
4291 | if (!adm_ctx.reply_skb) |
4292 | return retcode; | |
4293 | if (retcode != NO_ERROR) | |
4294 | goto out; | |
b411b363 | 4295 | |
afbbfa88 AG |
4296 | set_res_opts_defaults(&res_opts); |
4297 | err = res_opts_from_attrs(&res_opts, info); | |
4298 | if (err && err != -ENOMSG) { | |
4299 | retcode = ERR_MANDATORY_TAG; | |
a910b123 | 4300 | drbd_msg_put_info(adm_ctx.reply_skb, from_attrs_err_to_txt(err)); |
afbbfa88 | 4301 | goto out; |
b411b363 PR |
4302 | } |
4303 | ||
a910b123 | 4304 | retcode = drbd_check_resource_name(&adm_ctx); |
3b98c0c2 LE |
4305 | if (retcode != NO_ERROR) |
4306 | goto out; | |
b411b363 | 4307 | |
5c661042 | 4308 | if (adm_ctx.resource) { |
38f19616 LE |
4309 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) { |
4310 | retcode = ERR_INVALID_REQUEST; | |
a910b123 | 4311 | drbd_msg_put_info(adm_ctx.reply_skb, "resource exists"); |
38f19616 LE |
4312 | } |
4313 | /* else: still NO_ERROR */ | |
3b98c0c2 | 4314 | goto out; |
b411b363 | 4315 | } |
b411b363 | 4316 | |
9e276872 | 4317 | /* not yet safe for genl_family.parallel_ops */ |
28bc3b8c | 4318 | mutex_lock(&resources_mutex); |
a2972846 | 4319 | connection = conn_create(adm_ctx.resource_name, &res_opts); |
28bc3b8c | 4320 | mutex_unlock(&resources_mutex); |
a2972846 AG |
4321 | |
4322 | if (connection) { | |
4323 | struct resource_info resource_info; | |
4324 | ||
4325 | mutex_lock(¬ification_mutex); | |
4326 | resource_to_info(&resource_info, connection->resource); | |
4327 | notify_resource_state(NULL, 0, connection->resource, | |
4328 | &resource_info, NOTIFY_CREATE); | |
4329 | mutex_unlock(¬ification_mutex); | |
4330 | } else | |
4331 | retcode = ERR_NOMEM; | |
4332 | ||
3b98c0c2 | 4333 | out: |
a910b123 | 4334 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4335 | return 0; |
b411b363 PR |
4336 | } |
4337 | ||
a2972846 AG |
4338 | static void device_to_info(struct device_info *info, |
4339 | struct drbd_device *device) | |
4340 | { | |
4341 | info->dev_disk_state = device->state.disk; | |
4342 | } | |
4343 | ||
4344 | ||
05a10ec7 | 4345 | int drbd_adm_new_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4346 | { |
a910b123 | 4347 | struct drbd_config_context adm_ctx; |
3b98c0c2 LE |
4348 | struct drbd_genlmsghdr *dh = info->userhdr; |
4349 | enum drbd_ret_code retcode; | |
b411b363 | 4350 | |
a910b123 | 4351 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
4352 | if (!adm_ctx.reply_skb) |
4353 | return retcode; | |
4354 | if (retcode != NO_ERROR) | |
4355 | goto out; | |
b411b363 | 4356 | |
f2257a56 | 4357 | if (dh->minor > MINORMASK) { |
a910b123 | 4358 | drbd_msg_put_info(adm_ctx.reply_skb, "requested minor out of range"); |
3b98c0c2 LE |
4359 | retcode = ERR_INVALID_REQUEST; |
4360 | goto out; | |
b411b363 | 4361 | } |
0c8e36d9 | 4362 | if (adm_ctx.volume > DRBD_VOLUME_MAX) { |
a910b123 | 4363 | drbd_msg_put_info(adm_ctx.reply_skb, "requested volume id out of range"); |
3b98c0c2 LE |
4364 | retcode = ERR_INVALID_REQUEST; |
4365 | goto out; | |
b411b363 | 4366 | } |
b411b363 | 4367 | |
38f19616 | 4368 | /* drbd_adm_prepare made sure already |
a6b32bc3 | 4369 | * that first_peer_device(device)->connection and device->vnr match the request. */ |
b30ab791 | 4370 | if (adm_ctx.device) { |
38f19616 | 4371 | if (info->nlhdr->nlmsg_flags & NLM_F_EXCL) |
179e20b8 | 4372 | retcode = ERR_MINOR_OR_VOLUME_EXISTS; |
38f19616 LE |
4373 | /* else: still NO_ERROR */ |
4374 | goto out; | |
b411b363 | 4375 | } |
38f19616 | 4376 | |
9e276872 | 4377 | mutex_lock(&adm_ctx.resource->adm_mutex); |
a910b123 | 4378 | retcode = drbd_create_device(&adm_ctx, dh->minor); |
a2972846 AG |
4379 | if (retcode == NO_ERROR) { |
4380 | struct drbd_device *device; | |
4381 | struct drbd_peer_device *peer_device; | |
4382 | struct device_info info; | |
4383 | unsigned int peer_devices = 0; | |
4384 | enum drbd_notification_type flags; | |
4385 | ||
4386 | device = minor_to_device(dh->minor); | |
4387 | for_each_peer_device(peer_device, device) { | |
4388 | if (!has_net_conf(peer_device->connection)) | |
4389 | continue; | |
4390 | peer_devices++; | |
4391 | } | |
4392 | ||
4393 | device_to_info(&info, device); | |
4394 | mutex_lock(¬ification_mutex); | |
4395 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
4396 | notify_device_state(NULL, 0, device, &info, NOTIFY_CREATE | flags); | |
4397 | for_each_peer_device(peer_device, device) { | |
4398 | struct peer_device_info peer_device_info; | |
4399 | ||
4400 | if (!has_net_conf(peer_device->connection)) | |
4401 | continue; | |
4402 | peer_device_to_info(&peer_device_info, peer_device); | |
4403 | flags = (peer_devices--) ? NOTIFY_CONTINUES : 0; | |
4404 | notify_peer_device_state(NULL, 0, peer_device, &peer_device_info, | |
4405 | NOTIFY_CREATE | flags); | |
4406 | } | |
4407 | mutex_unlock(¬ification_mutex); | |
4408 | } | |
9e276872 | 4409 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
3b98c0c2 | 4410 | out: |
a910b123 | 4411 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4412 | return 0; |
b411b363 PR |
4413 | } |
4414 | ||
05a10ec7 | 4415 | static enum drbd_ret_code adm_del_minor(struct drbd_device *device) |
b411b363 | 4416 | { |
a2972846 AG |
4417 | struct drbd_peer_device *peer_device; |
4418 | ||
b30ab791 AG |
4419 | if (device->state.disk == D_DISKLESS && |
4420 | /* no need to be device->state.conn == C_STANDALONE && | |
85f75dd7 LE |
4421 | * we may want to delete a minor from a live replication group. |
4422 | */ | |
b30ab791 | 4423 | device->state.role == R_SECONDARY) { |
a2972846 AG |
4424 | struct drbd_connection *connection = |
4425 | first_connection(device->resource); | |
4426 | ||
b30ab791 | 4427 | _drbd_request_state(device, NS(conn, C_WF_REPORT_PARAMS), |
369bea63 | 4428 | CS_VERBOSE + CS_WAIT_COMPLETE); |
a2972846 AG |
4429 | |
4430 | /* If the state engine hasn't stopped the sender thread yet, we | |
4431 | * need to flush the sender work queue before generating the | |
4432 | * DESTROY events here. */ | |
4433 | if (get_t_state(&connection->worker) == RUNNING) | |
4434 | drbd_flush_workqueue(&connection->sender_work); | |
4435 | ||
4436 | mutex_lock(¬ification_mutex); | |
4437 | for_each_peer_device(peer_device, device) { | |
4438 | if (!has_net_conf(peer_device->connection)) | |
4439 | continue; | |
4440 | notify_peer_device_state(NULL, 0, peer_device, NULL, | |
4441 | NOTIFY_DESTROY | NOTIFY_CONTINUES); | |
4442 | } | |
4443 | notify_device_state(NULL, 0, device, NULL, NOTIFY_DESTROY); | |
4444 | mutex_unlock(¬ification_mutex); | |
4445 | ||
f82795d6 | 4446 | drbd_delete_device(device); |
85f75dd7 LE |
4447 | return NO_ERROR; |
4448 | } else | |
4449 | return ERR_MINOR_CONFIGURED; | |
b411b363 PR |
4450 | } |
4451 | ||
05a10ec7 | 4452 | int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4453 | { |
a910b123 | 4454 | struct drbd_config_context adm_ctx; |
3b98c0c2 | 4455 | enum drbd_ret_code retcode; |
b411b363 | 4456 | |
a910b123 | 4457 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_MINOR); |
3b98c0c2 LE |
4458 | if (!adm_ctx.reply_skb) |
4459 | return retcode; | |
4460 | if (retcode != NO_ERROR) | |
4461 | goto out; | |
b411b363 | 4462 | |
9e276872 | 4463 | mutex_lock(&adm_ctx.resource->adm_mutex); |
05a10ec7 | 4464 | retcode = adm_del_minor(adm_ctx.device); |
9e276872 | 4465 | mutex_unlock(&adm_ctx.resource->adm_mutex); |
85f75dd7 | 4466 | out: |
a910b123 | 4467 | drbd_adm_finish(&adm_ctx, info, retcode); |
85f75dd7 | 4468 | return 0; |
b411b363 PR |
4469 | } |
4470 | ||
179e20b8 AG |
4471 | static int adm_del_resource(struct drbd_resource *resource) |
4472 | { | |
4473 | struct drbd_connection *connection; | |
4474 | ||
4475 | for_each_connection(connection, resource) { | |
4476 | if (connection->cstate > C_STANDALONE) | |
4477 | return ERR_NET_CONFIGURED; | |
4478 | } | |
4479 | if (!idr_is_empty(&resource->devices)) | |
4480 | return ERR_RES_IN_USE; | |
4481 | ||
a2972846 AG |
4482 | /* The state engine has stopped the sender thread, so we don't |
4483 | * need to flush the sender work queue before generating the | |
4484 | * DESTROY event here. */ | |
4485 | mutex_lock(¬ification_mutex); | |
4486 | notify_resource_state(NULL, 0, resource, NULL, NOTIFY_DESTROY); | |
4487 | mutex_unlock(¬ification_mutex); | |
4488 | ||
28bc3b8c | 4489 | mutex_lock(&resources_mutex); |
179e20b8 | 4490 | list_del_rcu(&resource->resources); |
28bc3b8c | 4491 | mutex_unlock(&resources_mutex); |
179e20b8 AG |
4492 | /* Make sure all threads have actually stopped: state handling only |
4493 | * does drbd_thread_stop_nowait(). */ | |
4494 | list_for_each_entry(connection, &resource->connections, connections) | |
4495 | drbd_thread_stop(&connection->worker); | |
4496 | synchronize_rcu(); | |
4497 | drbd_free_resource(resource); | |
4498 | return NO_ERROR; | |
4499 | } | |
4500 | ||
85f75dd7 | 4501 | int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4502 | { |
a910b123 | 4503 | struct drbd_config_context adm_ctx; |
b6f85ef9 AG |
4504 | struct drbd_resource *resource; |
4505 | struct drbd_connection *connection; | |
4506 | struct drbd_device *device; | |
f3dfa40a | 4507 | int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ |
85f75dd7 | 4508 | unsigned i; |
b411b363 | 4509 | |
a910b123 | 4510 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
85f75dd7 LE |
4511 | if (!adm_ctx.reply_skb) |
4512 | return retcode; | |
4513 | if (retcode != NO_ERROR) | |
9e276872 | 4514 | goto finish; |
b411b363 | 4515 | |
b6f85ef9 | 4516 | resource = adm_ctx.resource; |
9e276872 | 4517 | mutex_lock(&resource->adm_mutex); |
85f75dd7 | 4518 | /* demote */ |
b6f85ef9 AG |
4519 | for_each_connection(connection, resource) { |
4520 | struct drbd_peer_device *peer_device; | |
4521 | ||
4522 | idr_for_each_entry(&connection->peer_devices, peer_device, i) { | |
4523 | retcode = drbd_set_role(peer_device->device, R_SECONDARY, 0); | |
4524 | if (retcode < SS_SUCCESS) { | |
a910b123 | 4525 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to demote"); |
b6f85ef9 AG |
4526 | goto out; |
4527 | } | |
4528 | } | |
4529 | ||
4530 | retcode = conn_try_disconnect(connection, 0); | |
85f75dd7 | 4531 | if (retcode < SS_SUCCESS) { |
a910b123 | 4532 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to disconnect"); |
c141ebda | 4533 | goto out; |
85f75dd7 | 4534 | } |
b411b363 | 4535 | } |
b411b363 | 4536 | |
85f75dd7 | 4537 | /* detach */ |
b6f85ef9 AG |
4538 | idr_for_each_entry(&resource->devices, device, i) { |
4539 | retcode = adm_detach(device, 0); | |
27012382 | 4540 | if (retcode < SS_SUCCESS || retcode > NO_ERROR) { |
a910b123 | 4541 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to detach"); |
c141ebda | 4542 | goto out; |
85f75dd7 LE |
4543 | } |
4544 | } | |
b411b363 | 4545 | |
85f75dd7 | 4546 | /* delete volumes */ |
b6f85ef9 AG |
4547 | idr_for_each_entry(&resource->devices, device, i) { |
4548 | retcode = adm_del_minor(device); | |
85f75dd7 LE |
4549 | if (retcode != NO_ERROR) { |
4550 | /* "can not happen" */ | |
a910b123 | 4551 | drbd_msg_put_info(adm_ctx.reply_skb, "failed to delete volume"); |
ef356262 | 4552 | goto out; |
85f75dd7 LE |
4553 | } |
4554 | } | |
b411b363 | 4555 | |
179e20b8 | 4556 | retcode = adm_del_resource(resource); |
3b98c0c2 | 4557 | out: |
9e276872 LE |
4558 | mutex_unlock(&resource->adm_mutex); |
4559 | finish: | |
a910b123 | 4560 | drbd_adm_finish(&adm_ctx, info, retcode); |
3b98c0c2 | 4561 | return 0; |
b411b363 PR |
4562 | } |
4563 | ||
789c1b62 | 4564 | int drbd_adm_del_resource(struct sk_buff *skb, struct genl_info *info) |
b411b363 | 4565 | { |
a910b123 | 4566 | struct drbd_config_context adm_ctx; |
77c556f6 | 4567 | struct drbd_resource *resource; |
3b98c0c2 | 4568 | enum drbd_ret_code retcode; |
b411b363 | 4569 | |
a910b123 | 4570 | retcode = drbd_adm_prepare(&adm_ctx, skb, info, DRBD_ADM_NEED_RESOURCE); |
3b98c0c2 LE |
4571 | if (!adm_ctx.reply_skb) |
4572 | return retcode; | |
4573 | if (retcode != NO_ERROR) | |
9e276872 | 4574 | goto finish; |
77c556f6 | 4575 | resource = adm_ctx.resource; |
b411b363 | 4576 | |
179e20b8 AG |
4577 | mutex_lock(&resource->adm_mutex); |
4578 | retcode = adm_del_resource(resource); | |
9e276872 LE |
4579 | mutex_unlock(&resource->adm_mutex); |
4580 | finish: | |
a910b123 | 4581 | drbd_adm_finish(&adm_ctx, info, retcode); |
b411b363 PR |
4582 | return 0; |
4583 | } | |
4584 | ||
b30ab791 | 4585 | void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib) |
b411b363 | 4586 | { |
3b98c0c2 LE |
4587 | struct sk_buff *msg; |
4588 | struct drbd_genlmsghdr *d_out; | |
4589 | unsigned seq; | |
4590 | int err = -ENOMEM; | |
4591 | ||
4592 | seq = atomic_inc_return(&drbd_genl_seq); | |
4593 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4594 | if (!msg) | |
4595 | goto failed; | |
4596 | ||
4597 | err = -EMSGSIZE; | |
4598 | d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); | |
4599 | if (!d_out) /* cannot happen, but anyways. */ | |
4600 | goto nla_put_failure; | |
b30ab791 | 4601 | d_out->minor = device_to_minor(device); |
6f9b5f84 | 4602 | d_out->ret_code = NO_ERROR; |
3b98c0c2 | 4603 | |
b30ab791 | 4604 | if (nla_put_status_info(msg, device, sib)) |
3b98c0c2 LE |
4605 | goto nla_put_failure; |
4606 | genlmsg_end(msg, d_out); | |
d38f8612 | 4607 | err = drbd_genl_multicast_events(msg, GFP_NOWAIT); |
3b98c0c2 LE |
4608 | /* msg has been consumed or freed in netlink_broadcast() */ |
4609 | if (err && err != -ESRCH) | |
4610 | goto failed; | |
b411b363 | 4611 | |
3b98c0c2 | 4612 | return; |
b411b363 | 4613 | |
3b98c0c2 LE |
4614 | nla_put_failure: |
4615 | nlmsg_free(msg); | |
4616 | failed: | |
d0180171 | 4617 | drbd_err(device, "Error %d while broadcasting event. " |
3b98c0c2 LE |
4618 | "Event seq:%u sib_reason:%u\n", |
4619 | err, seq, sib->sib_reason); | |
b411b363 | 4620 | } |
a2972846 | 4621 | |
a2972846 AG |
4622 | static int nla_put_notification_header(struct sk_buff *msg, |
4623 | enum drbd_notification_type type) | |
4624 | { | |
4625 | struct drbd_notification_header nh = { | |
4626 | .nh_type = type, | |
4627 | }; | |
4628 | ||
4629 | return drbd_notification_header_to_skb(msg, &nh, true); | |
4630 | } | |
4631 | ||
4632 | void notify_resource_state(struct sk_buff *skb, | |
4633 | unsigned int seq, | |
4634 | struct drbd_resource *resource, | |
4635 | struct resource_info *resource_info, | |
4636 | enum drbd_notification_type type) | |
4637 | { | |
4638 | struct resource_statistics resource_statistics; | |
4639 | struct drbd_genlmsghdr *dh; | |
4640 | bool multicast = false; | |
4641 | int err; | |
4642 | ||
4643 | if (!skb) { | |
4644 | seq = atomic_inc_return(¬ify_genl_seq); | |
4645 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4646 | err = -ENOMEM; | |
4647 | if (!skb) | |
4648 | goto failed; | |
4649 | multicast = true; | |
4650 | } | |
4651 | ||
4652 | err = -EMSGSIZE; | |
4653 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_RESOURCE_STATE); | |
4654 | if (!dh) | |
4655 | goto nla_put_failure; | |
4656 | dh->minor = -1U; | |
4657 | dh->ret_code = NO_ERROR; | |
4658 | if (nla_put_drbd_cfg_context(skb, resource, NULL, NULL) || | |
4659 | nla_put_notification_header(skb, type) || | |
4660 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4661 | resource_info_to_skb(skb, resource_info, true))) | |
4662 | goto nla_put_failure; | |
4663 | resource_statistics.res_stat_write_ordering = resource->write_ordering; | |
4664 | err = resource_statistics_to_skb(skb, &resource_statistics, !capable(CAP_SYS_ADMIN)); | |
4665 | if (err) | |
4666 | goto nla_put_failure; | |
4667 | genlmsg_end(skb, dh); | |
4668 | if (multicast) { | |
d38f8612 | 4669 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4670 | /* skb has been consumed or freed in netlink_broadcast() */ |
4671 | if (err && err != -ESRCH) | |
4672 | goto failed; | |
4673 | } | |
4674 | return; | |
4675 | ||
4676 | nla_put_failure: | |
4677 | nlmsg_free(skb); | |
4678 | failed: | |
4679 | drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n", | |
4680 | err, seq); | |
4681 | } | |
4682 | ||
4683 | void notify_device_state(struct sk_buff *skb, | |
4684 | unsigned int seq, | |
4685 | struct drbd_device *device, | |
4686 | struct device_info *device_info, | |
4687 | enum drbd_notification_type type) | |
4688 | { | |
4689 | struct device_statistics device_statistics; | |
4690 | struct drbd_genlmsghdr *dh; | |
4691 | bool multicast = false; | |
4692 | int err; | |
4693 | ||
4694 | if (!skb) { | |
4695 | seq = atomic_inc_return(¬ify_genl_seq); | |
4696 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4697 | err = -ENOMEM; | |
4698 | if (!skb) | |
4699 | goto failed; | |
4700 | multicast = true; | |
4701 | } | |
4702 | ||
4703 | err = -EMSGSIZE; | |
4704 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_DEVICE_STATE); | |
4705 | if (!dh) | |
4706 | goto nla_put_failure; | |
4707 | dh->minor = device->minor; | |
4708 | dh->ret_code = NO_ERROR; | |
4709 | if (nla_put_drbd_cfg_context(skb, device->resource, NULL, device) || | |
4710 | nla_put_notification_header(skb, type) || | |
4711 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4712 | device_info_to_skb(skb, device_info, true))) | |
4713 | goto nla_put_failure; | |
4714 | device_to_statistics(&device_statistics, device); | |
4715 | device_statistics_to_skb(skb, &device_statistics, !capable(CAP_SYS_ADMIN)); | |
4716 | genlmsg_end(skb, dh); | |
4717 | if (multicast) { | |
d38f8612 | 4718 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4719 | /* skb has been consumed or freed in netlink_broadcast() */ |
4720 | if (err && err != -ESRCH) | |
4721 | goto failed; | |
4722 | } | |
4723 | return; | |
4724 | ||
4725 | nla_put_failure: | |
4726 | nlmsg_free(skb); | |
4727 | failed: | |
4728 | drbd_err(device, "Error %d while broadcasting event. Event seq:%u\n", | |
4729 | err, seq); | |
4730 | } | |
4731 | ||
4732 | void notify_connection_state(struct sk_buff *skb, | |
4733 | unsigned int seq, | |
4734 | struct drbd_connection *connection, | |
4735 | struct connection_info *connection_info, | |
4736 | enum drbd_notification_type type) | |
4737 | { | |
4738 | struct connection_statistics connection_statistics; | |
4739 | struct drbd_genlmsghdr *dh; | |
4740 | bool multicast = false; | |
4741 | int err; | |
4742 | ||
4743 | if (!skb) { | |
4744 | seq = atomic_inc_return(¬ify_genl_seq); | |
4745 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4746 | err = -ENOMEM; | |
4747 | if (!skb) | |
4748 | goto failed; | |
4749 | multicast = true; | |
4750 | } | |
4751 | ||
4752 | err = -EMSGSIZE; | |
4753 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_CONNECTION_STATE); | |
4754 | if (!dh) | |
4755 | goto nla_put_failure; | |
4756 | dh->minor = -1U; | |
4757 | dh->ret_code = NO_ERROR; | |
4758 | if (nla_put_drbd_cfg_context(skb, connection->resource, connection, NULL) || | |
4759 | nla_put_notification_header(skb, type) || | |
4760 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4761 | connection_info_to_skb(skb, connection_info, true))) | |
4762 | goto nla_put_failure; | |
4763 | connection_statistics.conn_congested = test_bit(NET_CONGESTED, &connection->flags); | |
4764 | connection_statistics_to_skb(skb, &connection_statistics, !capable(CAP_SYS_ADMIN)); | |
4765 | genlmsg_end(skb, dh); | |
4766 | if (multicast) { | |
d38f8612 | 4767 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4768 | /* skb has been consumed or freed in netlink_broadcast() */ |
4769 | if (err && err != -ESRCH) | |
4770 | goto failed; | |
4771 | } | |
4772 | return; | |
4773 | ||
4774 | nla_put_failure: | |
4775 | nlmsg_free(skb); | |
4776 | failed: | |
4777 | drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n", | |
4778 | err, seq); | |
4779 | } | |
4780 | ||
4781 | void notify_peer_device_state(struct sk_buff *skb, | |
4782 | unsigned int seq, | |
4783 | struct drbd_peer_device *peer_device, | |
4784 | struct peer_device_info *peer_device_info, | |
4785 | enum drbd_notification_type type) | |
4786 | { | |
4787 | struct peer_device_statistics peer_device_statistics; | |
4788 | struct drbd_resource *resource = peer_device->device->resource; | |
4789 | struct drbd_genlmsghdr *dh; | |
4790 | bool multicast = false; | |
4791 | int err; | |
4792 | ||
4793 | if (!skb) { | |
4794 | seq = atomic_inc_return(¬ify_genl_seq); | |
4795 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4796 | err = -ENOMEM; | |
4797 | if (!skb) | |
4798 | goto failed; | |
4799 | multicast = true; | |
4800 | } | |
4801 | ||
4802 | err = -EMSGSIZE; | |
4803 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_PEER_DEVICE_STATE); | |
4804 | if (!dh) | |
4805 | goto nla_put_failure; | |
4806 | dh->minor = -1U; | |
4807 | dh->ret_code = NO_ERROR; | |
4808 | if (nla_put_drbd_cfg_context(skb, resource, peer_device->connection, peer_device->device) || | |
4809 | nla_put_notification_header(skb, type) || | |
4810 | ((type & ~NOTIFY_FLAGS) != NOTIFY_DESTROY && | |
4811 | peer_device_info_to_skb(skb, peer_device_info, true))) | |
4812 | goto nla_put_failure; | |
4813 | peer_device_to_statistics(&peer_device_statistics, peer_device); | |
4814 | peer_device_statistics_to_skb(skb, &peer_device_statistics, !capable(CAP_SYS_ADMIN)); | |
4815 | genlmsg_end(skb, dh); | |
4816 | if (multicast) { | |
d38f8612 | 4817 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4818 | /* skb has been consumed or freed in netlink_broadcast() */ |
4819 | if (err && err != -ESRCH) | |
4820 | goto failed; | |
4821 | } | |
4822 | return; | |
4823 | ||
4824 | nla_put_failure: | |
4825 | nlmsg_free(skb); | |
4826 | failed: | |
4827 | drbd_err(peer_device, "Error %d while broadcasting event. Event seq:%u\n", | |
4828 | err, seq); | |
4829 | } | |
4830 | ||
4831 | void notify_helper(enum drbd_notification_type type, | |
4832 | struct drbd_device *device, struct drbd_connection *connection, | |
4833 | const char *name, int status) | |
4834 | { | |
4835 | struct drbd_resource *resource = device ? device->resource : connection->resource; | |
4836 | struct drbd_helper_info helper_info; | |
4837 | unsigned int seq = atomic_inc_return(¬ify_genl_seq); | |
4838 | struct sk_buff *skb = NULL; | |
4839 | struct drbd_genlmsghdr *dh; | |
4840 | int err; | |
4841 | ||
4842 | strlcpy(helper_info.helper_name, name, sizeof(helper_info.helper_name)); | |
4843 | helper_info.helper_name_len = min(strlen(name), sizeof(helper_info.helper_name)); | |
4844 | helper_info.helper_status = status; | |
4845 | ||
4846 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); | |
4847 | err = -ENOMEM; | |
4848 | if (!skb) | |
4849 | goto fail; | |
4850 | ||
4851 | err = -EMSGSIZE; | |
4852 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_HELPER); | |
4853 | if (!dh) | |
4854 | goto fail; | |
4855 | dh->minor = device ? device->minor : -1; | |
4856 | dh->ret_code = NO_ERROR; | |
4857 | mutex_lock(¬ification_mutex); | |
4858 | if (nla_put_drbd_cfg_context(skb, resource, connection, device) || | |
4859 | nla_put_notification_header(skb, type) || | |
4860 | drbd_helper_info_to_skb(skb, &helper_info, true)) | |
4861 | goto unlock_fail; | |
4862 | genlmsg_end(skb, dh); | |
d38f8612 | 4863 | err = drbd_genl_multicast_events(skb, GFP_NOWAIT); |
a2972846 AG |
4864 | skb = NULL; |
4865 | /* skb has been consumed or freed in netlink_broadcast() */ | |
4866 | if (err && err != -ESRCH) | |
4867 | goto unlock_fail; | |
4868 | mutex_unlock(¬ification_mutex); | |
4869 | return; | |
4870 | ||
4871 | unlock_fail: | |
4872 | mutex_unlock(¬ification_mutex); | |
4873 | fail: | |
4874 | nlmsg_free(skb); | |
4875 | drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n", | |
4876 | err, seq); | |
4877 | } | |
4878 | ||
4879 | static void notify_initial_state_done(struct sk_buff *skb, unsigned int seq) | |
4880 | { | |
4881 | struct drbd_genlmsghdr *dh; | |
4882 | int err; | |
4883 | ||
4884 | err = -EMSGSIZE; | |
4885 | dh = genlmsg_put(skb, 0, seq, &drbd_genl_family, 0, DRBD_INITIAL_STATE_DONE); | |
4886 | if (!dh) | |
4887 | goto nla_put_failure; | |
4888 | dh->minor = -1U; | |
4889 | dh->ret_code = NO_ERROR; | |
4890 | if (nla_put_notification_header(skb, NOTIFY_EXISTS)) | |
4891 | goto nla_put_failure; | |
4892 | genlmsg_end(skb, dh); | |
4893 | return; | |
4894 | ||
4895 | nla_put_failure: | |
4896 | nlmsg_free(skb); | |
4897 | pr_err("Error %d sending event. Event seq:%u\n", err, seq); | |
4898 | } | |
4899 | ||
4900 | static void free_state_changes(struct list_head *list) | |
4901 | { | |
4902 | while (!list_empty(list)) { | |
4903 | struct drbd_state_change *state_change = | |
4904 | list_first_entry(list, struct drbd_state_change, list); | |
4905 | list_del(&state_change->list); | |
4906 | forget_state_change(state_change); | |
4907 | } | |
4908 | } | |
4909 | ||
4910 | static unsigned int notifications_for_state_change(struct drbd_state_change *state_change) | |
4911 | { | |
4912 | return 1 + | |
4913 | state_change->n_connections + | |
4914 | state_change->n_devices + | |
4915 | state_change->n_devices * state_change->n_connections; | |
4916 | } | |
4917 | ||
4918 | static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb) | |
4919 | { | |
4920 | struct drbd_state_change *state_change = (struct drbd_state_change *)cb->args[0]; | |
4921 | unsigned int seq = cb->args[2]; | |
4922 | unsigned int n; | |
4923 | enum drbd_notification_type flags = 0; | |
4924 | ||
4925 | /* There is no need for taking notification_mutex here: it doesn't | |
4926 | matter if the initial state events mix with later state chage | |
4927 | events; we can always tell the events apart by the NOTIFY_EXISTS | |
4928 | flag. */ | |
4929 | ||
4930 | cb->args[5]--; | |
4931 | if (cb->args[5] == 1) { | |
4932 | notify_initial_state_done(skb, seq); | |
4933 | goto out; | |
4934 | } | |
4935 | n = cb->args[4]++; | |
4936 | if (cb->args[4] < cb->args[3]) | |
4937 | flags |= NOTIFY_CONTINUES; | |
4938 | if (n < 1) { | |
4939 | notify_resource_state_change(skb, seq, state_change->resource, | |
4940 | NOTIFY_EXISTS | flags); | |
4941 | goto next; | |
4942 | } | |
4943 | n--; | |
4944 | if (n < state_change->n_connections) { | |
4945 | notify_connection_state_change(skb, seq, &state_change->connections[n], | |
4946 | NOTIFY_EXISTS | flags); | |
4947 | goto next; | |
4948 | } | |
4949 | n -= state_change->n_connections; | |
4950 | if (n < state_change->n_devices) { | |
4951 | notify_device_state_change(skb, seq, &state_change->devices[n], | |
4952 | NOTIFY_EXISTS | flags); | |
4953 | goto next; | |
4954 | } | |
4955 | n -= state_change->n_devices; | |
4956 | if (n < state_change->n_devices * state_change->n_connections) { | |
4957 | notify_peer_device_state_change(skb, seq, &state_change->peer_devices[n], | |
4958 | NOTIFY_EXISTS | flags); | |
4959 | goto next; | |
4960 | } | |
4961 | ||
4962 | next: | |
4963 | if (cb->args[4] == cb->args[3]) { | |
4964 | struct drbd_state_change *next_state_change = | |
4965 | list_entry(state_change->list.next, | |
4966 | struct drbd_state_change, list); | |
4967 | cb->args[0] = (long)next_state_change; | |
4968 | cb->args[3] = notifications_for_state_change(next_state_change); | |
4969 | cb->args[4] = 0; | |
4970 | } | |
4971 | out: | |
4972 | return skb->len; | |
4973 | } | |
4974 | ||
4975 | int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb) | |
4976 | { | |
4977 | struct drbd_resource *resource; | |
4978 | LIST_HEAD(head); | |
4979 | ||
4980 | if (cb->args[5] >= 1) { | |
4981 | if (cb->args[5] > 1) | |
4982 | return get_initial_state(skb, cb); | |
4983 | if (cb->args[0]) { | |
4984 | struct drbd_state_change *state_change = | |
4985 | (struct drbd_state_change *)cb->args[0]; | |
4986 | ||
4987 | /* connect list to head */ | |
4988 | list_add(&head, &state_change->list); | |
4989 | free_state_changes(&head); | |
4990 | } | |
4991 | return 0; | |
4992 | } | |
4993 | ||
4994 | cb->args[5] = 2; /* number of iterations */ | |
4995 | mutex_lock(&resources_mutex); | |
4996 | for_each_resource(resource, &drbd_resources) { | |
4997 | struct drbd_state_change *state_change; | |
4998 | ||
4999 | state_change = remember_old_state(resource, GFP_KERNEL); | |
5000 | if (!state_change) { | |
5001 | if (!list_empty(&head)) | |
5002 | free_state_changes(&head); | |
5003 | mutex_unlock(&resources_mutex); | |
5004 | return -ENOMEM; | |
5005 | } | |
5006 | copy_old_to_new_state_change(state_change); | |
5007 | list_add_tail(&state_change->list, &head); | |
5008 | cb->args[5] += notifications_for_state_change(state_change); | |
5009 | } | |
5010 | mutex_unlock(&resources_mutex); | |
5011 | ||
5012 | if (!list_empty(&head)) { | |
5013 | struct drbd_state_change *state_change = | |
5014 | list_entry(head.next, struct drbd_state_change, list); | |
5015 | cb->args[0] = (long)state_change; | |
5016 | cb->args[3] = notifications_for_state_change(state_change); | |
5017 | list_del(&head); /* detach list from head */ | |
5018 | } | |
5019 | ||
5020 | cb->args[2] = cb->nlh->nlmsg_seq; | |
5021 | return get_initial_state(skb, cb); | |
5022 | } |