4 This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
6 Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
7 Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
8 Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
10 drbd is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 drbd is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with drbd; see the file COPYING. If not, write to
22 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <linux/module.h>
27 #include <linux/drbd.h>
30 #include <linux/file.h>
31 #include <linux/slab.h>
32 #include <linux/blkpg.h>
33 #include <linux/cpumask.h>
36 #include "drbd_wrappers.h"
37 #include <asm/unaligned.h>
38 #include <linux/drbd_limits.h>
39 #include <linux/kthread.h>
41 #include <net/genetlink.h>
44 // int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info);
45 // int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info);
47 int drbd_adm_add_minor(struct sk_buff
*skb
, struct genl_info
*info
);
48 int drbd_adm_delete_minor(struct sk_buff
*skb
, struct genl_info
*info
);
50 int drbd_adm_new_resource(struct sk_buff
*skb
, struct genl_info
*info
);
51 int drbd_adm_del_resource(struct sk_buff
*skb
, struct genl_info
*info
);
52 int drbd_adm_down(struct sk_buff
*skb
, struct genl_info
*info
);
54 int drbd_adm_set_role(struct sk_buff
*skb
, struct genl_info
*info
);
55 int drbd_adm_attach(struct sk_buff
*skb
, struct genl_info
*info
);
56 int drbd_adm_disk_opts(struct sk_buff
*skb
, struct genl_info
*info
);
57 int drbd_adm_detach(struct sk_buff
*skb
, struct genl_info
*info
);
58 int drbd_adm_connect(struct sk_buff
*skb
, struct genl_info
*info
);
59 int drbd_adm_net_opts(struct sk_buff
*skb
, struct genl_info
*info
);
60 int drbd_adm_resize(struct sk_buff
*skb
, struct genl_info
*info
);
61 int drbd_adm_start_ov(struct sk_buff
*skb
, struct genl_info
*info
);
62 int drbd_adm_new_c_uuid(struct sk_buff
*skb
, struct genl_info
*info
);
63 int drbd_adm_disconnect(struct sk_buff
*skb
, struct genl_info
*info
);
64 int drbd_adm_invalidate(struct sk_buff
*skb
, struct genl_info
*info
);
65 int drbd_adm_invalidate_peer(struct sk_buff
*skb
, struct genl_info
*info
);
66 int drbd_adm_pause_sync(struct sk_buff
*skb
, struct genl_info
*info
);
67 int drbd_adm_resume_sync(struct sk_buff
*skb
, struct genl_info
*info
);
68 int drbd_adm_suspend_io(struct sk_buff
*skb
, struct genl_info
*info
);
69 int drbd_adm_resume_io(struct sk_buff
*skb
, struct genl_info
*info
);
70 int drbd_adm_outdate(struct sk_buff
*skb
, struct genl_info
*info
);
71 int drbd_adm_resource_opts(struct sk_buff
*skb
, struct genl_info
*info
);
72 int drbd_adm_get_status(struct sk_buff
*skb
, struct genl_info
*info
);
73 int drbd_adm_get_timeout_type(struct sk_buff
*skb
, struct genl_info
*info
);
75 int drbd_adm_get_status_all(struct sk_buff
*skb
, struct netlink_callback
*cb
);
77 #include <linux/drbd_genl_api.h>
79 #include <linux/genl_magic_func.h>
81 /* used blkdev_get_by_path, to claim our meta data device(s) */
82 static char *drbd_m_holder
= "Hands off! this is DRBD's meta data device.";
84 /* Configuration is strictly serialized, because generic netlink message
85 * processing is strictly serialized by the genl_lock().
86 * Which means we can use one static global drbd_config_context struct.
88 static struct drbd_config_context
{
89 /* assigned from drbd_genlmsghdr */
91 /* assigned from request attributes, if present */
93 #define VOLUME_UNSPECIFIED (-1U)
94 /* pointer into the request skb,
95 * limited lifetime! */
97 struct nlattr
*my_addr
;
98 struct nlattr
*peer_addr
;
101 struct sk_buff
*reply_skb
;
102 /* pointer into reply buffer */
103 struct drbd_genlmsghdr
*reply_dh
;
104 /* resolved from attributes, if possible */
105 struct drbd_conf
*mdev
;
106 struct drbd_tconn
*tconn
;
109 static void drbd_adm_send_reply(struct sk_buff
*skb
, struct genl_info
*info
)
111 genlmsg_end(skb
, genlmsg_data(nlmsg_data(nlmsg_hdr(skb
))));
112 if (genlmsg_reply(skb
, info
))
113 printk(KERN_ERR
"drbd: error sending genl reply\n");
116 /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only
117 * reason it could fail was no space in skb, and there are 4k available. */
118 int drbd_msg_put_info(const char *info
)
120 struct sk_buff
*skb
= adm_ctx
.reply_skb
;
124 if (!info
|| !info
[0])
127 nla
= nla_nest_start(skb
, DRBD_NLA_CFG_REPLY
);
131 err
= nla_put_string(skb
, T_info_text
, info
);
133 nla_nest_cancel(skb
, nla
);
136 nla_nest_end(skb
, nla
);
140 /* This would be a good candidate for a "pre_doit" hook,
141 * and per-family private info->pointers.
142 * But we need to stay compatible with older kernels.
143 * If it returns successfully, adm_ctx members are valid.
145 #define DRBD_ADM_NEED_MINOR 1
146 #define DRBD_ADM_NEED_RESOURCE 2
147 #define DRBD_ADM_NEED_CONNECTION 4
148 static int drbd_adm_prepare(struct sk_buff
*skb
, struct genl_info
*info
,
151 struct drbd_genlmsghdr
*d_in
= info
->userhdr
;
152 const u8 cmd
= info
->genlhdr
->cmd
;
155 memset(&adm_ctx
, 0, sizeof(adm_ctx
));
157 /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */
158 if (cmd
!= DRBD_ADM_GET_STATUS
&& !capable(CAP_NET_ADMIN
))
161 adm_ctx
.reply_skb
= genlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
162 if (!adm_ctx
.reply_skb
) {
167 adm_ctx
.reply_dh
= genlmsg_put_reply(adm_ctx
.reply_skb
,
168 info
, &drbd_genl_family
, 0, cmd
);
169 /* put of a few bytes into a fresh skb of >= 4k will always succeed.
171 if (!adm_ctx
.reply_dh
) {
176 adm_ctx
.reply_dh
->minor
= d_in
->minor
;
177 adm_ctx
.reply_dh
->ret_code
= NO_ERROR
;
179 adm_ctx
.volume
= VOLUME_UNSPECIFIED
;
180 if (info
->attrs
[DRBD_NLA_CFG_CONTEXT
]) {
182 /* parse and validate only */
183 err
= drbd_cfg_context_from_attrs(NULL
, info
);
187 /* It was present, and valid,
188 * copy it over to the reply skb. */
189 err
= nla_put_nohdr(adm_ctx
.reply_skb
,
190 info
->attrs
[DRBD_NLA_CFG_CONTEXT
]->nla_len
,
191 info
->attrs
[DRBD_NLA_CFG_CONTEXT
]);
195 /* and assign stuff to the global adm_ctx */
196 nla
= nested_attr_tb
[__nla_type(T_ctx_volume
)];
198 adm_ctx
.volume
= nla_get_u32(nla
);
199 nla
= nested_attr_tb
[__nla_type(T_ctx_resource_name
)];
201 adm_ctx
.resource_name
= nla_data(nla
);
202 adm_ctx
.my_addr
= nested_attr_tb
[__nla_type(T_ctx_my_addr
)];
203 adm_ctx
.peer_addr
= nested_attr_tb
[__nla_type(T_ctx_peer_addr
)];
204 if ((adm_ctx
.my_addr
&&
205 nla_len(adm_ctx
.my_addr
) > sizeof(adm_ctx
.tconn
->my_addr
)) ||
206 (adm_ctx
.peer_addr
&&
207 nla_len(adm_ctx
.peer_addr
) > sizeof(adm_ctx
.tconn
->peer_addr
))) {
213 adm_ctx
.minor
= d_in
->minor
;
214 adm_ctx
.mdev
= minor_to_mdev(d_in
->minor
);
215 adm_ctx
.tconn
= conn_get_by_name(adm_ctx
.resource_name
);
217 if (!adm_ctx
.mdev
&& (flags
& DRBD_ADM_NEED_MINOR
)) {
218 drbd_msg_put_info("unknown minor");
219 return ERR_MINOR_INVALID
;
221 if (!adm_ctx
.tconn
&& (flags
& DRBD_ADM_NEED_RESOURCE
)) {
222 drbd_msg_put_info("unknown resource");
223 return ERR_INVALID_REQUEST
;
226 if (flags
& DRBD_ADM_NEED_CONNECTION
) {
227 if (adm_ctx
.tconn
&& !(flags
& DRBD_ADM_NEED_RESOURCE
)) {
228 drbd_msg_put_info("no resource name expected");
229 return ERR_INVALID_REQUEST
;
232 drbd_msg_put_info("no minor number expected");
233 return ERR_INVALID_REQUEST
;
235 if (adm_ctx
.my_addr
&& adm_ctx
.peer_addr
)
236 adm_ctx
.tconn
= conn_get_by_addrs(nla_data(adm_ctx
.my_addr
),
237 nla_len(adm_ctx
.my_addr
),
238 nla_data(adm_ctx
.peer_addr
),
239 nla_len(adm_ctx
.peer_addr
));
240 if (!adm_ctx
.tconn
) {
241 drbd_msg_put_info("unknown connection");
242 return ERR_INVALID_REQUEST
;
246 /* some more paranoia, if the request was over-determined */
247 if (adm_ctx
.mdev
&& adm_ctx
.tconn
&&
248 adm_ctx
.mdev
->tconn
!= adm_ctx
.tconn
) {
249 pr_warning("request: minor=%u, resource=%s; but that minor belongs to connection %s\n",
250 adm_ctx
.minor
, adm_ctx
.resource_name
,
251 adm_ctx
.mdev
->tconn
->name
);
252 drbd_msg_put_info("minor exists in different resource");
253 return ERR_INVALID_REQUEST
;
256 adm_ctx
.volume
!= VOLUME_UNSPECIFIED
&&
257 adm_ctx
.volume
!= adm_ctx
.mdev
->vnr
) {
258 pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
259 adm_ctx
.minor
, adm_ctx
.volume
,
260 adm_ctx
.mdev
->vnr
, adm_ctx
.mdev
->tconn
->name
);
261 drbd_msg_put_info("minor exists as different volume");
262 return ERR_INVALID_REQUEST
;
268 nlmsg_free(adm_ctx
.reply_skb
);
269 adm_ctx
.reply_skb
= NULL
;
273 static int drbd_adm_finish(struct genl_info
*info
, int retcode
)
276 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
277 adm_ctx
.tconn
= NULL
;
280 if (!adm_ctx
.reply_skb
)
283 adm_ctx
.reply_dh
->ret_code
= retcode
;
284 drbd_adm_send_reply(adm_ctx
.reply_skb
, info
);
288 static void setup_khelper_env(struct drbd_tconn
*tconn
, char **envp
)
292 /* FIXME: A future version will not allow this case. */
293 if (tconn
->my_addr_len
== 0 || tconn
->peer_addr_len
== 0)
296 switch (((struct sockaddr
*)&tconn
->peer_addr
)->sa_family
) {
299 snprintf(envp
[4], 60, "DRBD_PEER_ADDRESS=%pI6",
300 &((struct sockaddr_in6
*)&tconn
->peer_addr
)->sin6_addr
);
304 snprintf(envp
[4], 60, "DRBD_PEER_ADDRESS=%pI4",
305 &((struct sockaddr_in
*)&tconn
->peer_addr
)->sin_addr
);
309 snprintf(envp
[4], 60, "DRBD_PEER_ADDRESS=%pI4",
310 &((struct sockaddr_in
*)&tconn
->peer_addr
)->sin_addr
);
312 snprintf(envp
[3], 20, "DRBD_PEER_AF=%s", afs
);
315 int drbd_khelper(struct drbd_conf
*mdev
, char *cmd
)
317 char *envp
[] = { "HOME=/",
319 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
320 (char[20]) { }, /* address family */
321 (char[60]) { }, /* address */
324 char *argv
[] = {usermode_helper
, cmd
, mb
, NULL
};
325 struct drbd_tconn
*tconn
= mdev
->tconn
;
329 if (current
== tconn
->worker
.task
)
330 set_bit(CALLBACK_PENDING
, &tconn
->flags
);
332 snprintf(mb
, 12, "minor-%d", mdev_to_minor(mdev
));
333 setup_khelper_env(tconn
, envp
);
335 /* The helper may take some time.
336 * write out any unsynced meta data changes now */
339 dev_info(DEV
, "helper command: %s %s %s\n", usermode_helper
, cmd
, mb
);
340 sib
.sib_reason
= SIB_HELPER_PRE
;
341 sib
.helper_name
= cmd
;
342 drbd_bcast_event(mdev
, &sib
);
343 ret
= call_usermodehelper(usermode_helper
, argv
, envp
, UMH_WAIT_PROC
);
345 dev_warn(DEV
, "helper command: %s %s %s exit code %u (0x%x)\n",
346 usermode_helper
, cmd
, mb
,
347 (ret
>> 8) & 0xff, ret
);
349 dev_info(DEV
, "helper command: %s %s %s exit code %u (0x%x)\n",
350 usermode_helper
, cmd
, mb
,
351 (ret
>> 8) & 0xff, ret
);
352 sib
.sib_reason
= SIB_HELPER_POST
;
353 sib
.helper_exit_code
= ret
;
354 drbd_bcast_event(mdev
, &sib
);
356 if (current
== tconn
->worker
.task
)
357 clear_bit(CALLBACK_PENDING
, &tconn
->flags
);
359 if (ret
< 0) /* Ignore any ERRNOs we got. */
365 int conn_khelper(struct drbd_tconn
*tconn
, char *cmd
)
367 char *envp
[] = { "HOME=/",
369 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
370 (char[20]) { }, /* address family */
371 (char[60]) { }, /* address */
373 char *argv
[] = {usermode_helper
, cmd
, tconn
->name
, NULL
};
376 setup_khelper_env(tconn
, envp
);
379 conn_info(tconn
, "helper command: %s %s %s\n", usermode_helper
, cmd
, tconn
->name
);
380 /* TODO: conn_bcast_event() ?? */
382 ret
= call_usermodehelper(usermode_helper
, argv
, envp
, UMH_WAIT_PROC
);
384 conn_warn(tconn
, "helper command: %s %s %s exit code %u (0x%x)\n",
385 usermode_helper
, cmd
, tconn
->name
,
386 (ret
>> 8) & 0xff, ret
);
388 conn_info(tconn
, "helper command: %s %s %s exit code %u (0x%x)\n",
389 usermode_helper
, cmd
, tconn
->name
,
390 (ret
>> 8) & 0xff, ret
);
391 /* TODO: conn_bcast_event() ?? */
393 if (ret
< 0) /* Ignore any ERRNOs we got. */
399 static enum drbd_fencing_p
highest_fencing_policy(struct drbd_tconn
*tconn
)
401 enum drbd_fencing_p fp
= FP_NOT_AVAIL
;
402 struct drbd_conf
*mdev
;
406 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
407 if (get_ldev_if_state(mdev
, D_CONSISTENT
)) {
408 fp
= max_t(enum drbd_fencing_p
, fp
,
409 rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
);
418 bool conn_try_outdate_peer(struct drbd_tconn
*tconn
)
420 union drbd_state mask
= { };
421 union drbd_state val
= { };
422 enum drbd_fencing_p fp
;
426 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
) {
427 conn_err(tconn
, "Expected cstate < C_WF_REPORT_PARAMS\n");
431 fp
= highest_fencing_policy(tconn
);
434 conn_warn(tconn
, "Not fencing peer, I'm not even Consistent myself.\n");
441 r
= conn_khelper(tconn
, "fence-peer");
443 switch ((r
>>8) & 0xff) {
444 case 3: /* peer is inconsistent */
445 ex_to_string
= "peer is inconsistent or worse";
447 val
.pdsk
= D_INCONSISTENT
;
449 case 4: /* peer got outdated, or was already outdated */
450 ex_to_string
= "peer was fenced";
452 val
.pdsk
= D_OUTDATED
;
454 case 5: /* peer was down */
455 if (conn_highest_disk(tconn
) == D_UP_TO_DATE
) {
456 /* we will(have) create(d) a new UUID anyways... */
457 ex_to_string
= "peer is unreachable, assumed to be dead";
459 val
.pdsk
= D_OUTDATED
;
461 ex_to_string
= "peer unreachable, doing nothing since disk != UpToDate";
464 case 6: /* Peer is primary, voluntarily outdate myself.
465 * This is useful when an unconnected R_SECONDARY is asked to
466 * become R_PRIMARY, but finds the other peer being active. */
467 ex_to_string
= "peer is active";
468 conn_warn(tconn
, "Peer is primary, outdating myself.\n");
470 val
.disk
= D_OUTDATED
;
473 if (fp
!= FP_STONITH
)
474 conn_err(tconn
, "fence-peer() = 7 && fencing != Stonith !!!\n");
475 ex_to_string
= "peer was stonithed";
477 val
.pdsk
= D_OUTDATED
;
480 /* The script is broken ... */
481 conn_err(tconn
, "fence-peer helper broken, returned %d\n", (r
>>8)&0xff);
482 return false; /* Eventually leave IO frozen */
485 conn_info(tconn
, "fence-peer helper returned %d (%s)\n",
486 (r
>>8) & 0xff, ex_to_string
);
491 conn_request_state(tconn, mask, val, CS_VERBOSE);
492 here, because we might were able to re-establish the connection in the
494 spin_lock_irq(&tconn
->req_lock
);
495 if (tconn
->cstate
< C_WF_REPORT_PARAMS
&& !test_bit(STATE_SENT
, &tconn
->flags
))
496 _conn_request_state(tconn
, mask
, val
, CS_VERBOSE
);
497 spin_unlock_irq(&tconn
->req_lock
);
499 return conn_highest_pdsk(tconn
) <= D_OUTDATED
;
502 static int _try_outdate_peer_async(void *data
)
504 struct drbd_tconn
*tconn
= (struct drbd_tconn
*)data
;
506 conn_try_outdate_peer(tconn
);
508 kref_put(&tconn
->kref
, &conn_destroy
);
512 void conn_try_outdate_peer_async(struct drbd_tconn
*tconn
)
514 struct task_struct
*opa
;
516 kref_get(&tconn
->kref
);
517 opa
= kthread_run(_try_outdate_peer_async
, tconn
, "drbd_async_h");
519 conn_err(tconn
, "out of mem, failed to invoke fence-peer helper\n");
520 kref_put(&tconn
->kref
, &conn_destroy
);
525 drbd_set_role(struct drbd_conf
*mdev
, enum drbd_role new_role
, int force
)
527 const int max_tries
= 4;
528 enum drbd_state_rv rv
= SS_UNKNOWN_ERROR
;
532 union drbd_state mask
, val
;
534 if (new_role
== R_PRIMARY
)
535 request_ping(mdev
->tconn
); /* Detect a dead peer ASAP */
537 mutex_lock(mdev
->state_mutex
);
539 mask
.i
= 0; mask
.role
= R_MASK
;
540 val
.i
= 0; val
.role
= new_role
;
542 while (try++ < max_tries
) {
543 rv
= _drbd_request_state(mdev
, mask
, val
, CS_WAIT_COMPLETE
);
545 /* in case we first succeeded to outdate,
546 * but now suddenly could establish a connection */
547 if (rv
== SS_CW_FAILED_BY_PEER
&& mask
.pdsk
!= 0) {
553 if (rv
== SS_NO_UP_TO_DATE_DISK
&& force
&&
554 (mdev
->state
.disk
< D_UP_TO_DATE
&&
555 mdev
->state
.disk
>= D_INCONSISTENT
)) {
557 val
.disk
= D_UP_TO_DATE
;
562 if (rv
== SS_NO_UP_TO_DATE_DISK
&&
563 mdev
->state
.disk
== D_CONSISTENT
&& mask
.pdsk
== 0) {
564 D_ASSERT(mdev
->state
.pdsk
== D_UNKNOWN
);
566 if (conn_try_outdate_peer(mdev
->tconn
)) {
567 val
.disk
= D_UP_TO_DATE
;
573 if (rv
== SS_NOTHING_TO_DO
)
575 if (rv
== SS_PRIMARY_NOP
&& mask
.pdsk
== 0) {
576 if (!conn_try_outdate_peer(mdev
->tconn
) && force
) {
577 dev_warn(DEV
, "Forced into split brain situation!\n");
579 val
.pdsk
= D_OUTDATED
;
584 if (rv
== SS_TWO_PRIMARIES
) {
585 /* Maybe the peer is detected as dead very soon...
586 retry at most once more in this case. */
589 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
590 timeo
= nc
? (nc
->ping_timeo
+ 1) * HZ
/ 10 : 1;
592 schedule_timeout_interruptible(timeo
);
597 if (rv
< SS_SUCCESS
) {
598 rv
= _drbd_request_state(mdev
, mask
, val
,
599 CS_VERBOSE
+ CS_WAIT_COMPLETE
);
610 dev_warn(DEV
, "Forced to consider local data as UpToDate!\n");
612 /* Wait until nothing is on the fly :) */
613 wait_event(mdev
->misc_wait
, atomic_read(&mdev
->ap_pending_cnt
) == 0);
615 /* FIXME also wait for all pending P_BARRIER_ACK? */
617 if (new_role
== R_SECONDARY
) {
618 set_disk_ro(mdev
->vdisk
, true);
619 if (get_ldev(mdev
)) {
620 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
624 mutex_lock(&mdev
->tconn
->conf_update
);
625 nc
= mdev
->tconn
->net_conf
;
627 nc
->discard_my_data
= 0; /* without copy; single bit op is atomic */
628 mutex_unlock(&mdev
->tconn
->conf_update
);
630 set_disk_ro(mdev
->vdisk
, false);
631 if (get_ldev(mdev
)) {
632 if (((mdev
->state
.conn
< C_CONNECTED
||
633 mdev
->state
.pdsk
<= D_FAILED
)
634 && mdev
->ldev
->md
.uuid
[UI_BITMAP
] == 0) || forced
)
635 drbd_uuid_new_current(mdev
);
637 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
642 /* writeout of activity log covered areas of the bitmap
643 * to stable storage done in after state change already */
645 if (mdev
->state
.conn
>= C_WF_REPORT_PARAMS
) {
646 /* if this was forced, we should consider sync */
648 drbd_send_uuids(mdev
);
649 drbd_send_current_state(mdev
);
654 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
656 mutex_unlock(mdev
->state_mutex
);
660 static const char *from_attrs_err_to_txt(int err
)
662 return err
== -ENOMSG
? "required attribute missing" :
663 err
== -EOPNOTSUPP
? "unknown mandatory attribute" :
664 err
== -EEXIST
? "can not change invariant setting" :
665 "invalid attribute value";
668 int drbd_adm_set_role(struct sk_buff
*skb
, struct genl_info
*info
)
670 struct set_role_parms parms
;
672 enum drbd_ret_code retcode
;
674 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
675 if (!adm_ctx
.reply_skb
)
677 if (retcode
!= NO_ERROR
)
680 memset(&parms
, 0, sizeof(parms
));
681 if (info
->attrs
[DRBD_NLA_SET_ROLE_PARMS
]) {
682 err
= set_role_parms_from_attrs(&parms
, info
);
684 retcode
= ERR_MANDATORY_TAG
;
685 drbd_msg_put_info(from_attrs_err_to_txt(err
));
690 if (info
->genlhdr
->cmd
== DRBD_ADM_PRIMARY
)
691 retcode
= drbd_set_role(adm_ctx
.mdev
, R_PRIMARY
, parms
.assume_uptodate
);
693 retcode
= drbd_set_role(adm_ctx
.mdev
, R_SECONDARY
, 0);
695 drbd_adm_finish(info
, retcode
);
699 /* Initializes the md.*_offset members, so we are able to find
700 * the on disk meta data.
702 * We currently have two possible layouts:
704 * |----------- md_size_sect ------------------|
705 * [ 4k superblock ][ activity log ][ Bitmap ]
707 * | bm_offset = al_offset + X |
708 * ==> bitmap sectors = md_size_sect - bm_offset
711 * |----------- md_size_sect ------------------|
712 * [data.....][ Bitmap ][ activity log ][ 4k superblock ]
714 * | bm_offset = al_offset - Y |
715 * ==> bitmap sectors = Y = al_offset - bm_offset
717 * Activity log size used to be fixed 32kB,
718 * but is about to become configurable.
720 static void drbd_md_set_sector_offsets(struct drbd_conf
*mdev
,
721 struct drbd_backing_dev
*bdev
)
723 sector_t md_size_sect
= 0;
724 unsigned int al_size_sect
= bdev
->md
.al_size_4k
* 8;
726 bdev
->md
.md_offset
= drbd_md_ss(bdev
);
728 switch (bdev
->md
.meta_dev_idx
) {
730 /* v07 style fixed size indexed meta data */
731 bdev
->md
.md_size_sect
= MD_128MB_SECT
;
732 bdev
->md
.al_offset
= MD_4kB_SECT
;
733 bdev
->md
.bm_offset
= MD_4kB_SECT
+ al_size_sect
;
735 case DRBD_MD_INDEX_FLEX_EXT
:
736 /* just occupy the full device; unit: sectors */
737 bdev
->md
.md_size_sect
= drbd_get_capacity(bdev
->md_bdev
);
738 bdev
->md
.al_offset
= MD_4kB_SECT
;
739 bdev
->md
.bm_offset
= MD_4kB_SECT
+ al_size_sect
;
741 case DRBD_MD_INDEX_INTERNAL
:
742 case DRBD_MD_INDEX_FLEX_INT
:
743 /* al size is still fixed */
744 bdev
->md
.al_offset
= -al_size_sect
;
745 /* we need (slightly less than) ~ this much bitmap sectors: */
746 md_size_sect
= drbd_get_capacity(bdev
->backing_bdev
);
747 md_size_sect
= ALIGN(md_size_sect
, BM_SECT_PER_EXT
);
748 md_size_sect
= BM_SECT_TO_EXT(md_size_sect
);
749 md_size_sect
= ALIGN(md_size_sect
, 8);
751 /* plus the "drbd meta data super block",
752 * and the activity log; */
753 md_size_sect
+= MD_4kB_SECT
+ al_size_sect
;
755 bdev
->md
.md_size_sect
= md_size_sect
;
756 /* bitmap offset is adjusted by 'super' block size */
757 bdev
->md
.bm_offset
= -md_size_sect
+ MD_4kB_SECT
;
762 /* input size is expected to be in KB */
763 char *ppsize(char *buf
, unsigned long long size
)
765 /* Needs 9 bytes at max including trailing NUL:
766 * -1ULL ==> "16384 EB" */
767 static char units
[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
769 while (size
>= 10000 && base
< sizeof(units
)-1) {
771 size
= (size
>> 10) + !!(size
& (1<<9));
774 sprintf(buf
, "%u %cB", (unsigned)size
, units
[base
]);
779 /* there is still a theoretical deadlock when called from receiver
780 * on an D_INCONSISTENT R_PRIMARY:
781 * remote READ does inc_ap_bio, receiver would need to receive answer
782 * packet from remote to dec_ap_bio again.
783 * receiver receive_sizes(), comes here,
784 * waits for ap_bio_cnt == 0. -> deadlock.
785 * but this cannot happen, actually, because:
786 * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable
787 * (not connected, or bad/no disk on peer):
788 * see drbd_fail_request_early, ap_bio_cnt is zero.
789 * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET:
790 * peer may not initiate a resize.
792 /* Note these are not to be confused with
793 * drbd_adm_suspend_io/drbd_adm_resume_io,
794 * which are (sub) state changes triggered by admin (drbdsetup),
795 * and can be long lived.
796 * This changes an mdev->flag, is triggered by drbd internals,
797 * and should be short-lived. */
798 void drbd_suspend_io(struct drbd_conf
*mdev
)
800 set_bit(SUSPEND_IO
, &mdev
->flags
);
801 if (drbd_suspended(mdev
))
803 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_bio_cnt
));
806 void drbd_resume_io(struct drbd_conf
*mdev
)
808 clear_bit(SUSPEND_IO
, &mdev
->flags
);
809 wake_up(&mdev
->misc_wait
);
813 * drbd_determine_dev_size() - Sets the right device size obeying all constraints
814 * @mdev: DRBD device.
816 * Returns 0 on success, negative return values indicate errors.
817 * You should call drbd_md_sync() after calling this function.
819 enum determine_dev_size
drbd_determine_dev_size(struct drbd_conf
*mdev
, enum dds_flags flags
) __must_hold(local
)
821 sector_t prev_first_sect
, prev_size
; /* previous meta location */
822 sector_t la_size_sect
, u_size
;
826 int md_moved
, la_size_changed
;
827 enum determine_dev_size rv
= unchanged
;
830 * application request passes inc_ap_bio,
831 * but then cannot get an AL-reference.
832 * this function later may wait on ap_bio_cnt == 0. -> deadlock.
835 * Suspend IO right here.
836 * still lock the act_log to not trigger ASSERTs there.
838 drbd_suspend_io(mdev
);
840 /* no wait necessary anymore, actually we could assert that */
841 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
843 prev_first_sect
= drbd_md_first_sector(mdev
->ldev
);
844 prev_size
= mdev
->ldev
->md
.md_size_sect
;
845 la_size_sect
= mdev
->ldev
->md
.la_size_sect
;
847 /* TODO: should only be some assert here, not (re)init... */
848 drbd_md_set_sector_offsets(mdev
, mdev
->ldev
);
851 u_size
= rcu_dereference(mdev
->ldev
->disk_conf
)->disk_size
;
853 size
= drbd_new_dev_size(mdev
, mdev
->ldev
, u_size
, flags
& DDSF_FORCED
);
855 if (drbd_get_capacity(mdev
->this_bdev
) != size
||
856 drbd_bm_capacity(mdev
) != size
) {
858 err
= drbd_bm_resize(mdev
, size
, !(flags
& DDSF_NO_RESYNC
));
860 /* currently there is only one error: ENOMEM! */
861 size
= drbd_bm_capacity(mdev
)>>1;
863 dev_err(DEV
, "OUT OF MEMORY! "
864 "Could not allocate bitmap!\n");
866 dev_err(DEV
, "BM resizing failed. "
867 "Leaving size unchanged at size = %lu KB\n",
868 (unsigned long)size
);
872 /* racy, see comments above. */
873 drbd_set_my_capacity(mdev
, size
);
874 mdev
->ldev
->md
.la_size_sect
= size
;
875 dev_info(DEV
, "size = %s (%llu KB)\n", ppsize(ppb
, size
>>1),
876 (unsigned long long)size
>>1);
878 if (rv
== dev_size_error
)
881 la_size_changed
= (la_size_sect
!= mdev
->ldev
->md
.la_size_sect
);
883 md_moved
= prev_first_sect
!= drbd_md_first_sector(mdev
->ldev
)
884 || prev_size
!= mdev
->ldev
->md
.md_size_sect
;
886 if (la_size_changed
|| md_moved
) {
889 drbd_al_shrink(mdev
); /* All extents inactive. */
890 dev_info(DEV
, "Writing the whole bitmap, %s\n",
891 la_size_changed
&& md_moved
? "size changed and md moved" :
892 la_size_changed
? "size changed" : "md moved");
893 /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
894 err
= drbd_bitmap_io(mdev
, md_moved
? &drbd_bm_write_all
: &drbd_bm_write
,
895 "size changed", BM_LOCKED_MASK
);
900 drbd_md_mark_dirty(mdev
);
903 if (size
> la_size_sect
)
905 if (size
< la_size_sect
)
908 lc_unlock(mdev
->act_log
);
909 wake_up(&mdev
->al_wait
);
910 drbd_resume_io(mdev
);
916 drbd_new_dev_size(struct drbd_conf
*mdev
, struct drbd_backing_dev
*bdev
,
917 sector_t u_size
, int assume_peer_has_space
)
919 sector_t p_size
= mdev
->p_size
; /* partner's disk size. */
920 sector_t la_size_sect
= bdev
->md
.la_size_sect
; /* last agreed size. */
921 sector_t m_size
; /* my size */
924 m_size
= drbd_get_max_capacity(bdev
);
926 if (mdev
->state
.conn
< C_CONNECTED
&& assume_peer_has_space
) {
927 dev_warn(DEV
, "Resize while not connected was forced by the user!\n");
931 if (p_size
&& m_size
) {
932 size
= min_t(sector_t
, p_size
, m_size
);
936 if (m_size
&& m_size
< size
)
938 if (p_size
&& p_size
< size
)
949 dev_err(DEV
, "Both nodes diskless!\n");
953 dev_err(DEV
, "Requested disk size is too big (%lu > %lu)\n",
954 (unsigned long)u_size
>>1, (unsigned long)size
>>1);
963 * drbd_check_al_size() - Ensures that the AL is of the right size
964 * @mdev: DRBD device.
966 * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation
967 * failed, and 0 on success. You should call drbd_md_sync() after you called
970 static int drbd_check_al_size(struct drbd_conf
*mdev
, struct disk_conf
*dc
)
972 struct lru_cache
*n
, *t
;
973 struct lc_element
*e
;
978 mdev
->act_log
->nr_elements
== dc
->al_extents
)
983 n
= lc_create("act_log", drbd_al_ext_cache
, AL_UPDATES_PER_TRANSACTION
,
984 dc
->al_extents
, sizeof(struct lc_element
), 0);
987 dev_err(DEV
, "Cannot allocate act_log lru!\n");
990 spin_lock_irq(&mdev
->al_lock
);
992 for (i
= 0; i
< t
->nr_elements
; i
++) {
993 e
= lc_element_by_index(t
, i
);
995 dev_err(DEV
, "refcnt(%d)==%d\n",
996 e
->lc_number
, e
->refcnt
);
1002 spin_unlock_irq(&mdev
->al_lock
);
1004 dev_err(DEV
, "Activity log still in use!\n");
1011 drbd_md_mark_dirty(mdev
); /* we changed mdev->act_log->nr_elemens */
1015 static void drbd_setup_queue_param(struct drbd_conf
*mdev
, unsigned int max_bio_size
)
1017 struct request_queue
* const q
= mdev
->rq_queue
;
1018 unsigned int max_hw_sectors
= max_bio_size
>> 9;
1019 unsigned int max_segments
= 0;
1021 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
1022 struct request_queue
* const b
= mdev
->ldev
->backing_bdev
->bd_disk
->queue
;
1024 max_hw_sectors
= min(queue_max_hw_sectors(b
), max_bio_size
>> 9);
1026 max_segments
= rcu_dereference(mdev
->ldev
->disk_conf
)->max_bio_bvecs
;
1031 blk_queue_logical_block_size(q
, 512);
1032 blk_queue_max_hw_sectors(q
, max_hw_sectors
);
1033 /* This is the workaround for "bio would need to, but cannot, be split" */
1034 blk_queue_max_segments(q
, max_segments
? max_segments
: BLK_MAX_SEGMENTS
);
1035 blk_queue_segment_boundary(q
, PAGE_CACHE_SIZE
-1);
1037 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
1038 struct request_queue
* const b
= mdev
->ldev
->backing_bdev
->bd_disk
->queue
;
1040 blk_queue_stack_limits(q
, b
);
1042 if (q
->backing_dev_info
.ra_pages
!= b
->backing_dev_info
.ra_pages
) {
1043 dev_info(DEV
, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
1044 q
->backing_dev_info
.ra_pages
,
1045 b
->backing_dev_info
.ra_pages
);
1046 q
->backing_dev_info
.ra_pages
= b
->backing_dev_info
.ra_pages
;
1052 void drbd_reconsider_max_bio_size(struct drbd_conf
*mdev
)
1054 unsigned int now
, new, local
, peer
;
1056 now
= queue_max_hw_sectors(mdev
->rq_queue
) << 9;
1057 local
= mdev
->local_max_bio_size
; /* Eventually last known value, from volatile memory */
1058 peer
= mdev
->peer_max_bio_size
; /* Eventually last known value, from meta data */
1060 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
1061 local
= queue_max_hw_sectors(mdev
->ldev
->backing_bdev
->bd_disk
->queue
) << 9;
1062 mdev
->local_max_bio_size
= local
;
1065 local
= min(local
, DRBD_MAX_BIO_SIZE
);
1067 /* We may ignore peer limits if the peer is modern enough.
1068 Because new from 8.3.8 onwards the peer can use multiple
1069 BIOs for a single peer_request */
1070 if (mdev
->state
.conn
>= C_CONNECTED
) {
1071 if (mdev
->tconn
->agreed_pro_version
< 94)
1072 peer
= min( mdev
->peer_max_bio_size
, DRBD_MAX_SIZE_H80_PACKET
);
1073 /* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */
1074 else if (mdev
->tconn
->agreed_pro_version
== 94)
1075 peer
= DRBD_MAX_SIZE_H80_PACKET
;
1076 else if (mdev
->tconn
->agreed_pro_version
< 100)
1077 peer
= DRBD_MAX_BIO_SIZE_P95
; /* drbd 8.3.8 onwards, before 8.4.0 */
1079 peer
= DRBD_MAX_BIO_SIZE
;
1082 new = min(local
, peer
);
1084 if (mdev
->state
.role
== R_PRIMARY
&& new < now
)
1085 dev_err(DEV
, "ASSERT FAILED new < now; (%u < %u)\n", new, now
);
1088 dev_info(DEV
, "max BIO size = %u\n", new);
1090 drbd_setup_queue_param(mdev
, new);
1093 /* Starts the worker thread */
1094 static void conn_reconfig_start(struct drbd_tconn
*tconn
)
1096 drbd_thread_start(&tconn
->worker
);
1097 conn_flush_workqueue(tconn
);
1100 /* if still unconfigured, stops worker again. */
1101 static void conn_reconfig_done(struct drbd_tconn
*tconn
)
1104 spin_lock_irq(&tconn
->req_lock
);
1105 stop_threads
= conn_all_vols_unconf(tconn
) &&
1106 tconn
->cstate
== C_STANDALONE
;
1107 spin_unlock_irq(&tconn
->req_lock
);
1109 /* asender is implicitly stopped by receiver
1110 * in conn_disconnect() */
1111 drbd_thread_stop(&tconn
->receiver
);
1112 drbd_thread_stop(&tconn
->worker
);
1116 /* Make sure IO is suspended before calling this function(). */
1117 static void drbd_suspend_al(struct drbd_conf
*mdev
)
1121 if (!lc_try_lock(mdev
->act_log
)) {
1122 dev_warn(DEV
, "Failed to lock al in drbd_suspend_al()\n");
1126 drbd_al_shrink(mdev
);
1127 spin_lock_irq(&mdev
->tconn
->req_lock
);
1128 if (mdev
->state
.conn
< C_CONNECTED
)
1129 s
= !test_and_set_bit(AL_SUSPENDED
, &mdev
->flags
);
1130 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1131 lc_unlock(mdev
->act_log
);
1134 dev_info(DEV
, "Suspended AL updates\n");
1138 static bool should_set_defaults(struct genl_info
*info
)
1140 unsigned flags
= ((struct drbd_genlmsghdr
*)info
->userhdr
)->flags
;
1141 return 0 != (flags
& DRBD_GENL_F_SET_DEFAULTS
);
1144 static unsigned int drbd_al_extents_max(struct drbd_backing_dev
*bdev
)
1146 /* This is limited by 16 bit "slot" numbers,
1147 * and by available on-disk context storage.
1149 * Also (u16)~0 is special (denotes a "free" extent).
1151 * One transaction occupies one 4kB on-disk block,
1152 * we have n such blocks in the on disk ring buffer,
1153 * the "current" transaction may fail (n-1),
1154 * and there is 919 slot numbers context information per transaction.
1156 * 72 transaction blocks amounts to more than 2**16 context slots,
1157 * so cap there first.
1159 const unsigned int max_al_nr
= DRBD_AL_EXTENTS_MAX
;
1160 const unsigned int sufficient_on_disk
=
1161 (max_al_nr
+ AL_CONTEXT_PER_TRANSACTION
-1)
1162 /AL_CONTEXT_PER_TRANSACTION
;
1164 unsigned int al_size_4k
= bdev
->md
.al_size_4k
;
1166 if (al_size_4k
> sufficient_on_disk
)
1169 return (al_size_4k
- 1) * AL_CONTEXT_PER_TRANSACTION
;
1172 int drbd_adm_disk_opts(struct sk_buff
*skb
, struct genl_info
*info
)
1174 enum drbd_ret_code retcode
;
1175 struct drbd_conf
*mdev
;
1176 struct disk_conf
*new_disk_conf
, *old_disk_conf
;
1177 struct fifo_buffer
*old_plan
= NULL
, *new_plan
= NULL
;
1180 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1181 if (!adm_ctx
.reply_skb
)
1183 if (retcode
!= NO_ERROR
)
1186 mdev
= adm_ctx
.mdev
;
1188 /* we also need a disk
1189 * to change the options on */
1190 if (!get_ldev(mdev
)) {
1191 retcode
= ERR_NO_DISK
;
1195 new_disk_conf
= kmalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
1196 if (!new_disk_conf
) {
1197 retcode
= ERR_NOMEM
;
1201 mutex_lock(&mdev
->tconn
->conf_update
);
1202 old_disk_conf
= mdev
->ldev
->disk_conf
;
1203 *new_disk_conf
= *old_disk_conf
;
1204 if (should_set_defaults(info
))
1205 set_disk_conf_defaults(new_disk_conf
);
1207 err
= disk_conf_from_attrs_for_change(new_disk_conf
, info
);
1208 if (err
&& err
!= -ENOMSG
) {
1209 retcode
= ERR_MANDATORY_TAG
;
1210 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1213 if (!expect(new_disk_conf
->resync_rate
>= 1))
1214 new_disk_conf
->resync_rate
= 1;
1216 if (new_disk_conf
->al_extents
< DRBD_AL_EXTENTS_MIN
)
1217 new_disk_conf
->al_extents
= DRBD_AL_EXTENTS_MIN
;
1218 if (new_disk_conf
->al_extents
> drbd_al_extents_max(mdev
->ldev
))
1219 new_disk_conf
->al_extents
= drbd_al_extents_max(mdev
->ldev
);
1221 if (new_disk_conf
->c_plan_ahead
> DRBD_C_PLAN_AHEAD_MAX
)
1222 new_disk_conf
->c_plan_ahead
= DRBD_C_PLAN_AHEAD_MAX
;
1224 fifo_size
= (new_disk_conf
->c_plan_ahead
* 10 * SLEEP_TIME
) / HZ
;
1225 if (fifo_size
!= mdev
->rs_plan_s
->size
) {
1226 new_plan
= fifo_alloc(fifo_size
);
1228 dev_err(DEV
, "kmalloc of fifo_buffer failed");
1229 retcode
= ERR_NOMEM
;
1234 drbd_suspend_io(mdev
);
1235 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
1236 drbd_al_shrink(mdev
);
1237 err
= drbd_check_al_size(mdev
, new_disk_conf
);
1238 lc_unlock(mdev
->act_log
);
1239 wake_up(&mdev
->al_wait
);
1240 drbd_resume_io(mdev
);
1243 retcode
= ERR_NOMEM
;
1247 write_lock_irq(&global_state_lock
);
1248 retcode
= drbd_resync_after_valid(mdev
, new_disk_conf
->resync_after
);
1249 if (retcode
== NO_ERROR
) {
1250 rcu_assign_pointer(mdev
->ldev
->disk_conf
, new_disk_conf
);
1251 drbd_resync_after_changed(mdev
);
1253 write_unlock_irq(&global_state_lock
);
1255 if (retcode
!= NO_ERROR
)
1259 old_plan
= mdev
->rs_plan_s
;
1260 rcu_assign_pointer(mdev
->rs_plan_s
, new_plan
);
1263 mutex_unlock(&mdev
->tconn
->conf_update
);
1265 if (new_disk_conf
->al_updates
)
1266 mdev
->ldev
->md
.flags
&= ~MDF_AL_DISABLED
;
1268 mdev
->ldev
->md
.flags
|= MDF_AL_DISABLED
;
1270 if (new_disk_conf
->md_flushes
)
1271 clear_bit(MD_NO_FUA
, &mdev
->flags
);
1273 set_bit(MD_NO_FUA
, &mdev
->flags
);
1275 drbd_bump_write_ordering(mdev
->tconn
, WO_bdev_flush
);
1279 if (mdev
->state
.conn
>= C_CONNECTED
)
1280 drbd_send_sync_param(mdev
);
1283 kfree(old_disk_conf
);
1285 mod_timer(&mdev
->request_timer
, jiffies
+ HZ
);
1289 mutex_unlock(&mdev
->tconn
->conf_update
);
1291 kfree(new_disk_conf
);
1296 drbd_adm_finish(info
, retcode
);
1300 int drbd_adm_attach(struct sk_buff
*skb
, struct genl_info
*info
)
1302 struct drbd_conf
*mdev
;
1304 enum drbd_ret_code retcode
;
1305 enum determine_dev_size dd
;
1306 sector_t max_possible_sectors
;
1307 sector_t min_md_device_sectors
;
1308 struct drbd_backing_dev
*nbc
= NULL
; /* new_backing_conf */
1309 struct disk_conf
*new_disk_conf
= NULL
;
1310 struct block_device
*bdev
;
1311 struct lru_cache
*resync_lru
= NULL
;
1312 struct fifo_buffer
*new_plan
= NULL
;
1313 union drbd_state ns
, os
;
1314 enum drbd_state_rv rv
;
1315 struct net_conf
*nc
;
1317 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1318 if (!adm_ctx
.reply_skb
)
1320 if (retcode
!= NO_ERROR
)
1323 mdev
= adm_ctx
.mdev
;
1324 conn_reconfig_start(mdev
->tconn
);
1326 /* if you want to reconfigure, please tear down first */
1327 if (mdev
->state
.disk
> D_DISKLESS
) {
1328 retcode
= ERR_DISK_CONFIGURED
;
1331 /* It may just now have detached because of IO error. Make sure
1332 * drbd_ldev_destroy is done already, we may end up here very fast,
1333 * e.g. if someone calls attach from the on-io-error handler,
1334 * to realize a "hot spare" feature (not that I'd recommend that) */
1335 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->local_cnt
));
1337 /* make sure there is no leftover from previous force-detach attempts */
1338 clear_bit(FORCE_DETACH
, &mdev
->flags
);
1339 clear_bit(WAS_IO_ERROR
, &mdev
->flags
);
1340 clear_bit(WAS_READ_ERROR
, &mdev
->flags
);
1342 /* and no leftover from previously aborted resync or verify, either */
1344 mdev
->rs_failed
= 0;
1345 atomic_set(&mdev
->rs_pending_cnt
, 0);
1347 /* allocation not in the IO path, drbdsetup context */
1348 nbc
= kzalloc(sizeof(struct drbd_backing_dev
), GFP_KERNEL
);
1350 retcode
= ERR_NOMEM
;
1353 spin_lock_init(&nbc
->md
.uuid_lock
);
1355 new_disk_conf
= kzalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
1356 if (!new_disk_conf
) {
1357 retcode
= ERR_NOMEM
;
1360 nbc
->disk_conf
= new_disk_conf
;
1362 set_disk_conf_defaults(new_disk_conf
);
1363 err
= disk_conf_from_attrs(new_disk_conf
, info
);
1365 retcode
= ERR_MANDATORY_TAG
;
1366 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1370 if (new_disk_conf
->c_plan_ahead
> DRBD_C_PLAN_AHEAD_MAX
)
1371 new_disk_conf
->c_plan_ahead
= DRBD_C_PLAN_AHEAD_MAX
;
1373 new_plan
= fifo_alloc((new_disk_conf
->c_plan_ahead
* 10 * SLEEP_TIME
) / HZ
);
1375 retcode
= ERR_NOMEM
;
1379 if (new_disk_conf
->meta_dev_idx
< DRBD_MD_INDEX_FLEX_INT
) {
1380 retcode
= ERR_MD_IDX_INVALID
;
1384 write_lock_irq(&global_state_lock
);
1385 retcode
= drbd_resync_after_valid(mdev
, new_disk_conf
->resync_after
);
1386 write_unlock_irq(&global_state_lock
);
1387 if (retcode
!= NO_ERROR
)
1391 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
1393 if (new_disk_conf
->fencing
== FP_STONITH
&& nc
->wire_protocol
== DRBD_PROT_A
) {
1395 retcode
= ERR_STONITH_AND_PROT_A
;
1401 bdev
= blkdev_get_by_path(new_disk_conf
->backing_dev
,
1402 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
, mdev
);
1404 dev_err(DEV
, "open(\"%s\") failed with %ld\n", new_disk_conf
->backing_dev
,
1406 retcode
= ERR_OPEN_DISK
;
1409 nbc
->backing_bdev
= bdev
;
1412 * meta_dev_idx >= 0: external fixed size, possibly multiple
1413 * drbd sharing one meta device. TODO in that case, paranoia
1414 * check that [md_bdev, meta_dev_idx] is not yet used by some
1415 * other drbd minor! (if you use drbd.conf + drbdadm, that
1416 * should check it for you already; but if you don't, or
1417 * someone fooled it, we need to double check here)
1419 bdev
= blkdev_get_by_path(new_disk_conf
->meta_dev
,
1420 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
,
1421 (new_disk_conf
->meta_dev_idx
< 0) ?
1422 (void *)mdev
: (void *)drbd_m_holder
);
1424 dev_err(DEV
, "open(\"%s\") failed with %ld\n", new_disk_conf
->meta_dev
,
1426 retcode
= ERR_OPEN_MD_DISK
;
1429 nbc
->md_bdev
= bdev
;
1431 if ((nbc
->backing_bdev
== nbc
->md_bdev
) !=
1432 (new_disk_conf
->meta_dev_idx
== DRBD_MD_INDEX_INTERNAL
||
1433 new_disk_conf
->meta_dev_idx
== DRBD_MD_INDEX_FLEX_INT
)) {
1434 retcode
= ERR_MD_IDX_INVALID
;
1438 resync_lru
= lc_create("resync", drbd_bm_ext_cache
,
1439 1, 61, sizeof(struct bm_extent
),
1440 offsetof(struct bm_extent
, lce
));
1442 retcode
= ERR_NOMEM
;
1446 /* Read our meta data super block early.
1447 * This also sets other on-disk offsets. */
1448 retcode
= drbd_md_read(mdev
, nbc
);
1449 if (retcode
!= NO_ERROR
)
1452 if (new_disk_conf
->al_extents
< DRBD_AL_EXTENTS_MIN
)
1453 new_disk_conf
->al_extents
= DRBD_AL_EXTENTS_MIN
;
1454 if (new_disk_conf
->al_extents
> drbd_al_extents_max(nbc
))
1455 new_disk_conf
->al_extents
= drbd_al_extents_max(nbc
);
1457 if (drbd_get_max_capacity(nbc
) < new_disk_conf
->disk_size
) {
1458 dev_err(DEV
, "max capacity %llu smaller than disk size %llu\n",
1459 (unsigned long long) drbd_get_max_capacity(nbc
),
1460 (unsigned long long) new_disk_conf
->disk_size
);
1461 retcode
= ERR_DISK_TOO_SMALL
;
1465 if (new_disk_conf
->meta_dev_idx
< 0) {
1466 max_possible_sectors
= DRBD_MAX_SECTORS_FLEX
;
1467 /* at least one MB, otherwise it does not make sense */
1468 min_md_device_sectors
= (2<<10);
1470 max_possible_sectors
= DRBD_MAX_SECTORS
;
1471 min_md_device_sectors
= MD_128MB_SECT
* (new_disk_conf
->meta_dev_idx
+ 1);
1474 if (drbd_get_capacity(nbc
->md_bdev
) < min_md_device_sectors
) {
1475 retcode
= ERR_MD_DISK_TOO_SMALL
;
1476 dev_warn(DEV
, "refusing attach: md-device too small, "
1477 "at least %llu sectors needed for this meta-disk type\n",
1478 (unsigned long long) min_md_device_sectors
);
1482 /* Make sure the new disk is big enough
1483 * (we may currently be R_PRIMARY with no local disk...) */
1484 if (drbd_get_max_capacity(nbc
) <
1485 drbd_get_capacity(mdev
->this_bdev
)) {
1486 retcode
= ERR_DISK_TOO_SMALL
;
1490 nbc
->known_size
= drbd_get_capacity(nbc
->backing_bdev
);
1492 if (nbc
->known_size
> max_possible_sectors
) {
1493 dev_warn(DEV
, "==> truncating very big lower level device "
1494 "to currently maximum possible %llu sectors <==\n",
1495 (unsigned long long) max_possible_sectors
);
1496 if (new_disk_conf
->meta_dev_idx
>= 0)
1497 dev_warn(DEV
, "==>> using internal or flexible "
1498 "meta data may help <<==\n");
1501 drbd_suspend_io(mdev
);
1502 /* also wait for the last barrier ack. */
1503 /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171
1504 * We need a way to either ignore barrier acks for barriers sent before a device
1505 * was attached, or a way to wait for all pending barrier acks to come in.
1506 * As barriers are counted per resource,
1507 * we'd need to suspend io on all devices of a resource.
1509 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_pending_cnt
) || drbd_suspended(mdev
));
1510 /* and for any other previously queued work */
1511 drbd_flush_workqueue(mdev
);
1513 rv
= _drbd_request_state(mdev
, NS(disk
, D_ATTACHING
), CS_VERBOSE
);
1514 retcode
= rv
; /* FIXME: Type mismatch. */
1515 drbd_resume_io(mdev
);
1516 if (rv
< SS_SUCCESS
)
1519 if (!get_ldev_if_state(mdev
, D_ATTACHING
))
1520 goto force_diskless
;
1522 if (!mdev
->bitmap
) {
1523 if (drbd_bm_init(mdev
)) {
1524 retcode
= ERR_NOMEM
;
1525 goto force_diskless_dec
;
1529 if (mdev
->state
.conn
< C_CONNECTED
&&
1530 mdev
->state
.role
== R_PRIMARY
&&
1531 (mdev
->ed_uuid
& ~((u64
)1)) != (nbc
->md
.uuid
[UI_CURRENT
] & ~((u64
)1))) {
1532 dev_err(DEV
, "Can only attach to data with current UUID=%016llX\n",
1533 (unsigned long long)mdev
->ed_uuid
);
1534 retcode
= ERR_DATA_NOT_CURRENT
;
1535 goto force_diskless_dec
;
1538 /* Since we are diskless, fix the activity log first... */
1539 if (drbd_check_al_size(mdev
, new_disk_conf
)) {
1540 retcode
= ERR_NOMEM
;
1541 goto force_diskless_dec
;
1544 /* Prevent shrinking of consistent devices ! */
1545 if (drbd_md_test_flag(nbc
, MDF_CONSISTENT
) &&
1546 drbd_new_dev_size(mdev
, nbc
, nbc
->disk_conf
->disk_size
, 0) < nbc
->md
.la_size_sect
) {
1547 dev_warn(DEV
, "refusing to truncate a consistent device\n");
1548 retcode
= ERR_DISK_TOO_SMALL
;
1549 goto force_diskless_dec
;
1552 /* Reset the "barriers don't work" bits here, then force meta data to
1553 * be written, to ensure we determine if barriers are supported. */
1554 if (new_disk_conf
->md_flushes
)
1555 clear_bit(MD_NO_FUA
, &mdev
->flags
);
1557 set_bit(MD_NO_FUA
, &mdev
->flags
);
1559 /* Point of no return reached.
1560 * Devices and memory are no longer released by error cleanup below.
1561 * now mdev takes over responsibility, and the state engine should
1562 * clean it up somewhere. */
1563 D_ASSERT(mdev
->ldev
== NULL
);
1565 mdev
->resync
= resync_lru
;
1566 mdev
->rs_plan_s
= new_plan
;
1569 new_disk_conf
= NULL
;
1572 drbd_bump_write_ordering(mdev
->tconn
, WO_bdev_flush
);
1574 if (drbd_md_test_flag(mdev
->ldev
, MDF_CRASHED_PRIMARY
))
1575 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1577 clear_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1579 if (drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1580 !(mdev
->state
.role
== R_PRIMARY
&& mdev
->tconn
->susp_nod
))
1581 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1588 drbd_reconsider_max_bio_size(mdev
);
1590 /* If I am currently not R_PRIMARY,
1591 * but meta data primary indicator is set,
1592 * I just now recover from a hard crash,
1593 * and have been R_PRIMARY before that crash.
1595 * Now, if I had no connection before that crash
1596 * (have been degraded R_PRIMARY), chances are that
1597 * I won't find my peer now either.
1599 * In that case, and _only_ in that case,
1600 * we use the degr-wfc-timeout instead of the default,
1601 * so we can automatically recover from a crash of a
1602 * degraded but active "cluster" after a certain timeout.
1604 clear_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1605 if (mdev
->state
.role
!= R_PRIMARY
&&
1606 drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1607 !drbd_md_test_flag(mdev
->ldev
, MDF_CONNECTED_IND
))
1608 set_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1610 dd
= drbd_determine_dev_size(mdev
, 0);
1611 if (dd
== dev_size_error
) {
1612 retcode
= ERR_NOMEM_BITMAP
;
1613 goto force_diskless_dec
;
1614 } else if (dd
== grew
)
1615 set_bit(RESYNC_AFTER_NEG
, &mdev
->flags
);
1617 if (drbd_md_test_flag(mdev
->ldev
, MDF_FULL_SYNC
) ||
1618 (test_bit(CRASHED_PRIMARY
, &mdev
->flags
) &&
1619 drbd_md_test_flag(mdev
->ldev
, MDF_AL_DISABLED
))) {
1620 dev_info(DEV
, "Assuming that all blocks are out of sync "
1621 "(aka FullSync)\n");
1622 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
1623 "set_n_write from attaching", BM_LOCKED_MASK
)) {
1624 retcode
= ERR_IO_MD_DISK
;
1625 goto force_diskless_dec
;
1628 if (drbd_bitmap_io(mdev
, &drbd_bm_read
,
1629 "read from attaching", BM_LOCKED_MASK
)) {
1630 retcode
= ERR_IO_MD_DISK
;
1631 goto force_diskless_dec
;
1635 if (_drbd_bm_total_weight(mdev
) == drbd_bm_bits(mdev
))
1636 drbd_suspend_al(mdev
); /* IO is still suspended here... */
1638 spin_lock_irq(&mdev
->tconn
->req_lock
);
1639 os
= drbd_read_state(mdev
);
1641 /* If MDF_CONSISTENT is not set go into inconsistent state,
1642 otherwise investigate MDF_WasUpToDate...
1643 If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
1644 otherwise into D_CONSISTENT state.
1646 if (drbd_md_test_flag(mdev
->ldev
, MDF_CONSISTENT
)) {
1647 if (drbd_md_test_flag(mdev
->ldev
, MDF_WAS_UP_TO_DATE
))
1648 ns
.disk
= D_CONSISTENT
;
1650 ns
.disk
= D_OUTDATED
;
1652 ns
.disk
= D_INCONSISTENT
;
1655 if (drbd_md_test_flag(mdev
->ldev
, MDF_PEER_OUT_DATED
))
1656 ns
.pdsk
= D_OUTDATED
;
1659 if (ns
.disk
== D_CONSISTENT
&&
1660 (ns
.pdsk
== D_OUTDATED
|| rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
== FP_DONT_CARE
))
1661 ns
.disk
= D_UP_TO_DATE
;
1663 /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
1664 MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
1665 this point, because drbd_request_state() modifies these
1668 if (rcu_dereference(mdev
->ldev
->disk_conf
)->al_updates
)
1669 mdev
->ldev
->md
.flags
&= ~MDF_AL_DISABLED
;
1671 mdev
->ldev
->md
.flags
|= MDF_AL_DISABLED
;
1675 /* In case we are C_CONNECTED postpone any decision on the new disk
1676 state after the negotiation phase. */
1677 if (mdev
->state
.conn
== C_CONNECTED
) {
1678 mdev
->new_state_tmp
.i
= ns
.i
;
1680 ns
.disk
= D_NEGOTIATING
;
1682 /* We expect to receive up-to-date UUIDs soon.
1683 To avoid a race in receive_state, free p_uuid while
1684 holding req_lock. I.e. atomic with the state change */
1685 kfree(mdev
->p_uuid
);
1686 mdev
->p_uuid
= NULL
;
1689 rv
= _drbd_set_state(mdev
, ns
, CS_VERBOSE
, NULL
);
1690 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1692 if (rv
< SS_SUCCESS
)
1693 goto force_diskless_dec
;
1695 mod_timer(&mdev
->request_timer
, jiffies
+ HZ
);
1697 if (mdev
->state
.role
== R_PRIMARY
)
1698 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
1700 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
1702 drbd_md_mark_dirty(mdev
);
1705 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1707 conn_reconfig_done(mdev
->tconn
);
1708 drbd_adm_finish(info
, retcode
);
1714 drbd_force_state(mdev
, NS(disk
, D_DISKLESS
));
1717 conn_reconfig_done(mdev
->tconn
);
1719 if (nbc
->backing_bdev
)
1720 blkdev_put(nbc
->backing_bdev
,
1721 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1723 blkdev_put(nbc
->md_bdev
,
1724 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1727 kfree(new_disk_conf
);
1728 lc_destroy(resync_lru
);
1732 drbd_adm_finish(info
, retcode
);
1736 static int adm_detach(struct drbd_conf
*mdev
, int force
)
1738 enum drbd_state_rv retcode
;
1742 set_bit(FORCE_DETACH
, &mdev
->flags
);
1743 drbd_force_state(mdev
, NS(disk
, D_FAILED
));
1744 retcode
= SS_SUCCESS
;
1748 drbd_suspend_io(mdev
); /* so no-one is stuck in drbd_al_begin_io */
1749 drbd_md_get_buffer(mdev
); /* make sure there is no in-flight meta-data IO */
1750 retcode
= drbd_request_state(mdev
, NS(disk
, D_FAILED
));
1751 drbd_md_put_buffer(mdev
);
1752 /* D_FAILED will transition to DISKLESS. */
1753 ret
= wait_event_interruptible(mdev
->misc_wait
,
1754 mdev
->state
.disk
!= D_FAILED
);
1755 drbd_resume_io(mdev
);
1756 if ((int)retcode
== (int)SS_IS_DISKLESS
)
1757 retcode
= SS_NOTHING_TO_DO
;
1764 /* Detaching the disk is a process in multiple stages. First we need to lock
1765 * out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
1766 * Then we transition to D_DISKLESS, and wait for put_ldev() to return all
1767 * internal references as well.
1768 * Only then we have finally detached. */
1769 int drbd_adm_detach(struct sk_buff
*skb
, struct genl_info
*info
)
1771 enum drbd_ret_code retcode
;
1772 struct detach_parms parms
= { };
1775 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1776 if (!adm_ctx
.reply_skb
)
1778 if (retcode
!= NO_ERROR
)
1781 if (info
->attrs
[DRBD_NLA_DETACH_PARMS
]) {
1782 err
= detach_parms_from_attrs(&parms
, info
);
1784 retcode
= ERR_MANDATORY_TAG
;
1785 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1790 retcode
= adm_detach(adm_ctx
.mdev
, parms
.force_detach
);
1792 drbd_adm_finish(info
, retcode
);
1796 static bool conn_resync_running(struct drbd_tconn
*tconn
)
1798 struct drbd_conf
*mdev
;
1803 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
1804 if (mdev
->state
.conn
== C_SYNC_SOURCE
||
1805 mdev
->state
.conn
== C_SYNC_TARGET
||
1806 mdev
->state
.conn
== C_PAUSED_SYNC_S
||
1807 mdev
->state
.conn
== C_PAUSED_SYNC_T
) {
1817 static bool conn_ov_running(struct drbd_tconn
*tconn
)
1819 struct drbd_conf
*mdev
;
1824 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
1825 if (mdev
->state
.conn
== C_VERIFY_S
||
1826 mdev
->state
.conn
== C_VERIFY_T
) {
1836 static enum drbd_ret_code
1837 _check_net_options(struct drbd_tconn
*tconn
, struct net_conf
*old_conf
, struct net_conf
*new_conf
)
1839 struct drbd_conf
*mdev
;
1842 if (old_conf
&& tconn
->cstate
== C_WF_REPORT_PARAMS
&& tconn
->agreed_pro_version
< 100) {
1843 if (new_conf
->wire_protocol
!= old_conf
->wire_protocol
)
1844 return ERR_NEED_APV_100
;
1846 if (new_conf
->two_primaries
!= old_conf
->two_primaries
)
1847 return ERR_NEED_APV_100
;
1849 if (strcmp(new_conf
->integrity_alg
, old_conf
->integrity_alg
))
1850 return ERR_NEED_APV_100
;
1853 if (!new_conf
->two_primaries
&&
1854 conn_highest_role(tconn
) == R_PRIMARY
&&
1855 conn_highest_peer(tconn
) == R_PRIMARY
)
1856 return ERR_NEED_ALLOW_TWO_PRI
;
1858 if (new_conf
->two_primaries
&&
1859 (new_conf
->wire_protocol
!= DRBD_PROT_C
))
1860 return ERR_NOT_PROTO_C
;
1862 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1863 if (get_ldev(mdev
)) {
1864 enum drbd_fencing_p fp
= rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
;
1866 if (new_conf
->wire_protocol
== DRBD_PROT_A
&& fp
== FP_STONITH
)
1867 return ERR_STONITH_AND_PROT_A
;
1869 if (mdev
->state
.role
== R_PRIMARY
&& new_conf
->discard_my_data
)
1870 return ERR_DISCARD_IMPOSSIBLE
;
1873 if (new_conf
->on_congestion
!= OC_BLOCK
&& new_conf
->wire_protocol
!= DRBD_PROT_A
)
1874 return ERR_CONG_NOT_PROTO_A
;
1879 static enum drbd_ret_code
1880 check_net_options(struct drbd_tconn
*tconn
, struct net_conf
*new_conf
)
1882 static enum drbd_ret_code rv
;
1883 struct drbd_conf
*mdev
;
1887 rv
= _check_net_options(tconn
, rcu_dereference(tconn
->net_conf
), new_conf
);
1890 /* tconn->volumes protected by genl_lock() here */
1891 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1892 if (!mdev
->bitmap
) {
1893 if(drbd_bm_init(mdev
))
1902 struct crypto_hash
*verify_tfm
;
1903 struct crypto_hash
*csums_tfm
;
1904 struct crypto_hash
*cram_hmac_tfm
;
1905 struct crypto_hash
*integrity_tfm
;
1909 alloc_hash(struct crypto_hash
**tfm
, char *tfm_name
, int err_alg
)
1914 *tfm
= crypto_alloc_hash(tfm_name
, 0, CRYPTO_ALG_ASYNC
);
1923 static enum drbd_ret_code
1924 alloc_crypto(struct crypto
*crypto
, struct net_conf
*new_conf
)
1926 char hmac_name
[CRYPTO_MAX_ALG_NAME
];
1927 enum drbd_ret_code rv
;
1929 rv
= alloc_hash(&crypto
->csums_tfm
, new_conf
->csums_alg
,
1933 rv
= alloc_hash(&crypto
->verify_tfm
, new_conf
->verify_alg
,
1937 rv
= alloc_hash(&crypto
->integrity_tfm
, new_conf
->integrity_alg
,
1941 if (new_conf
->cram_hmac_alg
[0] != 0) {
1942 snprintf(hmac_name
, CRYPTO_MAX_ALG_NAME
, "hmac(%s)",
1943 new_conf
->cram_hmac_alg
);
1945 rv
= alloc_hash(&crypto
->cram_hmac_tfm
, hmac_name
,
1952 static void free_crypto(struct crypto
*crypto
)
1954 crypto_free_hash(crypto
->cram_hmac_tfm
);
1955 crypto_free_hash(crypto
->integrity_tfm
);
1956 crypto_free_hash(crypto
->csums_tfm
);
1957 crypto_free_hash(crypto
->verify_tfm
);
1960 int drbd_adm_net_opts(struct sk_buff
*skb
, struct genl_info
*info
)
1962 enum drbd_ret_code retcode
;
1963 struct drbd_tconn
*tconn
;
1964 struct net_conf
*old_conf
, *new_conf
= NULL
;
1966 int ovr
; /* online verify running */
1967 int rsr
; /* re-sync running */
1968 struct crypto crypto
= { };
1970 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONNECTION
);
1971 if (!adm_ctx
.reply_skb
)
1973 if (retcode
!= NO_ERROR
)
1976 tconn
= adm_ctx
.tconn
;
1978 new_conf
= kzalloc(sizeof(struct net_conf
), GFP_KERNEL
);
1980 retcode
= ERR_NOMEM
;
1984 conn_reconfig_start(tconn
);
1986 mutex_lock(&tconn
->data
.mutex
);
1987 mutex_lock(&tconn
->conf_update
);
1988 old_conf
= tconn
->net_conf
;
1991 drbd_msg_put_info("net conf missing, try connect");
1992 retcode
= ERR_INVALID_REQUEST
;
1996 *new_conf
= *old_conf
;
1997 if (should_set_defaults(info
))
1998 set_net_conf_defaults(new_conf
);
2000 err
= net_conf_from_attrs_for_change(new_conf
, info
);
2001 if (err
&& err
!= -ENOMSG
) {
2002 retcode
= ERR_MANDATORY_TAG
;
2003 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2007 retcode
= check_net_options(tconn
, new_conf
);
2008 if (retcode
!= NO_ERROR
)
2011 /* re-sync running */
2012 rsr
= conn_resync_running(tconn
);
2013 if (rsr
&& strcmp(new_conf
->csums_alg
, old_conf
->csums_alg
)) {
2014 retcode
= ERR_CSUMS_RESYNC_RUNNING
;
2018 /* online verify running */
2019 ovr
= conn_ov_running(tconn
);
2020 if (ovr
&& strcmp(new_conf
->verify_alg
, old_conf
->verify_alg
)) {
2021 retcode
= ERR_VERIFY_RUNNING
;
2025 retcode
= alloc_crypto(&crypto
, new_conf
);
2026 if (retcode
!= NO_ERROR
)
2029 rcu_assign_pointer(tconn
->net_conf
, new_conf
);
2032 crypto_free_hash(tconn
->csums_tfm
);
2033 tconn
->csums_tfm
= crypto
.csums_tfm
;
2034 crypto
.csums_tfm
= NULL
;
2037 crypto_free_hash(tconn
->verify_tfm
);
2038 tconn
->verify_tfm
= crypto
.verify_tfm
;
2039 crypto
.verify_tfm
= NULL
;
2042 crypto_free_hash(tconn
->integrity_tfm
);
2043 tconn
->integrity_tfm
= crypto
.integrity_tfm
;
2044 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
&& tconn
->agreed_pro_version
>= 100)
2045 /* Do this without trying to take tconn->data.mutex again. */
2046 __drbd_send_protocol(tconn
, P_PROTOCOL_UPDATE
);
2048 crypto_free_hash(tconn
->cram_hmac_tfm
);
2049 tconn
->cram_hmac_tfm
= crypto
.cram_hmac_tfm
;
2051 mutex_unlock(&tconn
->conf_update
);
2052 mutex_unlock(&tconn
->data
.mutex
);
2056 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
)
2057 drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn
)));
2062 mutex_unlock(&tconn
->conf_update
);
2063 mutex_unlock(&tconn
->data
.mutex
);
2064 free_crypto(&crypto
);
2067 conn_reconfig_done(tconn
);
2069 drbd_adm_finish(info
, retcode
);
2073 int drbd_adm_connect(struct sk_buff
*skb
, struct genl_info
*info
)
2075 struct drbd_conf
*mdev
;
2076 struct net_conf
*old_conf
, *new_conf
= NULL
;
2077 struct crypto crypto
= { };
2078 struct drbd_tconn
*tconn
;
2079 enum drbd_ret_code retcode
;
2083 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
2085 if (!adm_ctx
.reply_skb
)
2087 if (retcode
!= NO_ERROR
)
2089 if (!(adm_ctx
.my_addr
&& adm_ctx
.peer_addr
)) {
2090 drbd_msg_put_info("connection endpoint(s) missing");
2091 retcode
= ERR_INVALID_REQUEST
;
2095 /* No need for _rcu here. All reconfiguration is
2096 * strictly serialized on genl_lock(). We are protected against
2097 * concurrent reconfiguration/addition/deletion */
2098 list_for_each_entry(tconn
, &drbd_tconns
, all_tconn
) {
2099 if (nla_len(adm_ctx
.my_addr
) == tconn
->my_addr_len
&&
2100 !memcmp(nla_data(adm_ctx
.my_addr
), &tconn
->my_addr
, tconn
->my_addr_len
)) {
2101 retcode
= ERR_LOCAL_ADDR
;
2105 if (nla_len(adm_ctx
.peer_addr
) == tconn
->peer_addr_len
&&
2106 !memcmp(nla_data(adm_ctx
.peer_addr
), &tconn
->peer_addr
, tconn
->peer_addr_len
)) {
2107 retcode
= ERR_PEER_ADDR
;
2112 tconn
= adm_ctx
.tconn
;
2113 conn_reconfig_start(tconn
);
2115 if (tconn
->cstate
> C_STANDALONE
) {
2116 retcode
= ERR_NET_CONFIGURED
;
2120 /* allocation not in the IO path, drbdsetup / netlink process context */
2121 new_conf
= kzalloc(sizeof(*new_conf
), GFP_KERNEL
);
2123 retcode
= ERR_NOMEM
;
2127 set_net_conf_defaults(new_conf
);
2129 err
= net_conf_from_attrs(new_conf
, info
);
2130 if (err
&& err
!= -ENOMSG
) {
2131 retcode
= ERR_MANDATORY_TAG
;
2132 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2136 retcode
= check_net_options(tconn
, new_conf
);
2137 if (retcode
!= NO_ERROR
)
2140 retcode
= alloc_crypto(&crypto
, new_conf
);
2141 if (retcode
!= NO_ERROR
)
2144 ((char *)new_conf
->shared_secret
)[SHARED_SECRET_MAX
-1] = 0;
2146 conn_flush_workqueue(tconn
);
2148 mutex_lock(&tconn
->conf_update
);
2149 old_conf
= tconn
->net_conf
;
2151 retcode
= ERR_NET_CONFIGURED
;
2152 mutex_unlock(&tconn
->conf_update
);
2155 rcu_assign_pointer(tconn
->net_conf
, new_conf
);
2157 conn_free_crypto(tconn
);
2158 tconn
->cram_hmac_tfm
= crypto
.cram_hmac_tfm
;
2159 tconn
->integrity_tfm
= crypto
.integrity_tfm
;
2160 tconn
->csums_tfm
= crypto
.csums_tfm
;
2161 tconn
->verify_tfm
= crypto
.verify_tfm
;
2163 tconn
->my_addr_len
= nla_len(adm_ctx
.my_addr
);
2164 memcpy(&tconn
->my_addr
, nla_data(adm_ctx
.my_addr
), tconn
->my_addr_len
);
2165 tconn
->peer_addr_len
= nla_len(adm_ctx
.peer_addr
);
2166 memcpy(&tconn
->peer_addr
, nla_data(adm_ctx
.peer_addr
), tconn
->peer_addr_len
);
2168 mutex_unlock(&tconn
->conf_update
);
2171 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
2177 retcode
= conn_request_state(tconn
, NS(conn
, C_UNCONNECTED
), CS_VERBOSE
);
2179 conn_reconfig_done(tconn
);
2180 drbd_adm_finish(info
, retcode
);
2184 free_crypto(&crypto
);
2187 conn_reconfig_done(tconn
);
2189 drbd_adm_finish(info
, retcode
);
2193 static enum drbd_state_rv
conn_try_disconnect(struct drbd_tconn
*tconn
, bool force
)
2195 enum drbd_state_rv rv
;
2197 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
),
2198 force
? CS_HARD
: 0);
2201 case SS_NOTHING_TO_DO
:
2203 case SS_ALREADY_STANDALONE
:
2205 case SS_PRIMARY_NOP
:
2206 /* Our state checking code wants to see the peer outdated. */
2207 rv
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
, pdsk
, D_OUTDATED
), 0);
2209 if (rv
== SS_OUTDATE_WO_CONN
) /* lost connection before graceful disconnect succeeded */
2210 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
), CS_VERBOSE
);
2213 case SS_CW_FAILED_BY_PEER
:
2214 /* The peer probably wants to see us outdated. */
2215 rv
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
2216 disk
, D_OUTDATED
), 0);
2217 if (rv
== SS_IS_DISKLESS
|| rv
== SS_LOWER_THAN_OUTDATED
) {
2218 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
),
2223 /* no special handling necessary */
2226 if (rv
>= SS_SUCCESS
) {
2227 enum drbd_state_rv rv2
;
2228 /* No one else can reconfigure the network while I am here.
2229 * The state handling only uses drbd_thread_stop_nowait(),
2230 * we want to really wait here until the receiver is no more.
2232 drbd_thread_stop(&adm_ctx
.tconn
->receiver
);
2234 /* Race breaker. This additional state change request may be
2235 * necessary, if this was a forced disconnect during a receiver
2236 * restart. We may have "killed" the receiver thread just
2237 * after drbdd_init() returned. Typically, we should be
2238 * C_STANDALONE already, now, and this becomes a no-op.
2240 rv2
= conn_request_state(tconn
, NS(conn
, C_STANDALONE
),
2241 CS_VERBOSE
| CS_HARD
);
2242 if (rv2
< SS_SUCCESS
)
2244 "unexpected rv2=%d in conn_try_disconnect()\n",
2250 int drbd_adm_disconnect(struct sk_buff
*skb
, struct genl_info
*info
)
2252 struct disconnect_parms parms
;
2253 struct drbd_tconn
*tconn
;
2254 enum drbd_state_rv rv
;
2255 enum drbd_ret_code retcode
;
2258 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONNECTION
);
2259 if (!adm_ctx
.reply_skb
)
2261 if (retcode
!= NO_ERROR
)
2264 tconn
= adm_ctx
.tconn
;
2265 memset(&parms
, 0, sizeof(parms
));
2266 if (info
->attrs
[DRBD_NLA_DISCONNECT_PARMS
]) {
2267 err
= disconnect_parms_from_attrs(&parms
, info
);
2269 retcode
= ERR_MANDATORY_TAG
;
2270 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2275 rv
= conn_try_disconnect(tconn
, parms
.force_disconnect
);
2276 if (rv
< SS_SUCCESS
)
2277 retcode
= rv
; /* FIXME: Type mismatch. */
2281 drbd_adm_finish(info
, retcode
);
2285 void resync_after_online_grow(struct drbd_conf
*mdev
)
2287 int iass
; /* I am sync source */
2289 dev_info(DEV
, "Resync of new storage after online grow\n");
2290 if (mdev
->state
.role
!= mdev
->state
.peer
)
2291 iass
= (mdev
->state
.role
== R_PRIMARY
);
2293 iass
= test_bit(RESOLVE_CONFLICTS
, &mdev
->tconn
->flags
);
2296 drbd_start_resync(mdev
, C_SYNC_SOURCE
);
2298 _drbd_request_state(mdev
, NS(conn
, C_WF_SYNC_UUID
), CS_VERBOSE
+ CS_SERIALIZE
);
2301 int drbd_adm_resize(struct sk_buff
*skb
, struct genl_info
*info
)
2303 struct disk_conf
*old_disk_conf
, *new_disk_conf
= NULL
;
2304 struct resize_parms rs
;
2305 struct drbd_conf
*mdev
;
2306 enum drbd_ret_code retcode
;
2307 enum determine_dev_size dd
;
2308 enum dds_flags ddsf
;
2312 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2313 if (!adm_ctx
.reply_skb
)
2315 if (retcode
!= NO_ERROR
)
2318 memset(&rs
, 0, sizeof(struct resize_parms
));
2319 if (info
->attrs
[DRBD_NLA_RESIZE_PARMS
]) {
2320 err
= resize_parms_from_attrs(&rs
, info
);
2322 retcode
= ERR_MANDATORY_TAG
;
2323 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2328 mdev
= adm_ctx
.mdev
;
2329 if (mdev
->state
.conn
> C_CONNECTED
) {
2330 retcode
= ERR_RESIZE_RESYNC
;
2334 if (mdev
->state
.role
== R_SECONDARY
&&
2335 mdev
->state
.peer
== R_SECONDARY
) {
2336 retcode
= ERR_NO_PRIMARY
;
2340 if (!get_ldev(mdev
)) {
2341 retcode
= ERR_NO_DISK
;
2345 if (rs
.no_resync
&& mdev
->tconn
->agreed_pro_version
< 93) {
2346 retcode
= ERR_NEED_APV_93
;
2351 u_size
= rcu_dereference(mdev
->ldev
->disk_conf
)->disk_size
;
2353 if (u_size
!= (sector_t
)rs
.resize_size
) {
2354 new_disk_conf
= kmalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
2355 if (!new_disk_conf
) {
2356 retcode
= ERR_NOMEM
;
2361 if (mdev
->ldev
->known_size
!= drbd_get_capacity(mdev
->ldev
->backing_bdev
))
2362 mdev
->ldev
->known_size
= drbd_get_capacity(mdev
->ldev
->backing_bdev
);
2364 if (new_disk_conf
) {
2365 mutex_lock(&mdev
->tconn
->conf_update
);
2366 old_disk_conf
= mdev
->ldev
->disk_conf
;
2367 *new_disk_conf
= *old_disk_conf
;
2368 new_disk_conf
->disk_size
= (sector_t
)rs
.resize_size
;
2369 rcu_assign_pointer(mdev
->ldev
->disk_conf
, new_disk_conf
);
2370 mutex_unlock(&mdev
->tconn
->conf_update
);
2372 kfree(old_disk_conf
);
2375 ddsf
= (rs
.resize_force
? DDSF_FORCED
: 0) | (rs
.no_resync
? DDSF_NO_RESYNC
: 0);
2376 dd
= drbd_determine_dev_size(mdev
, ddsf
);
2379 if (dd
== dev_size_error
) {
2380 retcode
= ERR_NOMEM_BITMAP
;
2384 if (mdev
->state
.conn
== C_CONNECTED
) {
2386 set_bit(RESIZE_PENDING
, &mdev
->flags
);
2388 drbd_send_uuids(mdev
);
2389 drbd_send_sizes(mdev
, 1, ddsf
);
2393 drbd_adm_finish(info
, retcode
);
2401 int drbd_adm_resource_opts(struct sk_buff
*skb
, struct genl_info
*info
)
2403 enum drbd_ret_code retcode
;
2404 struct drbd_tconn
*tconn
;
2405 struct res_opts res_opts
;
2408 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
2409 if (!adm_ctx
.reply_skb
)
2411 if (retcode
!= NO_ERROR
)
2413 tconn
= adm_ctx
.tconn
;
2415 res_opts
= tconn
->res_opts
;
2416 if (should_set_defaults(info
))
2417 set_res_opts_defaults(&res_opts
);
2419 err
= res_opts_from_attrs(&res_opts
, info
);
2420 if (err
&& err
!= -ENOMSG
) {
2421 retcode
= ERR_MANDATORY_TAG
;
2422 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2426 err
= set_resource_options(tconn
, &res_opts
);
2428 retcode
= ERR_INVALID_REQUEST
;
2430 retcode
= ERR_NOMEM
;
2434 drbd_adm_finish(info
, retcode
);
2438 int drbd_adm_invalidate(struct sk_buff
*skb
, struct genl_info
*info
)
2440 struct drbd_conf
*mdev
;
2441 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2443 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2444 if (!adm_ctx
.reply_skb
)
2446 if (retcode
!= NO_ERROR
)
2449 mdev
= adm_ctx
.mdev
;
2451 /* If there is still bitmap IO pending, probably because of a previous
2452 * resync just being finished, wait for it before requesting a new resync.
2453 * Also wait for it's after_state_ch(). */
2454 drbd_suspend_io(mdev
);
2455 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2456 drbd_flush_workqueue(mdev
);
2458 /* If we happen to be C_STANDALONE R_SECONDARY, just change to
2459 * D_INCONSISTENT, and set all bits in the bitmap. Otherwise,
2460 * try to start a resync handshake as sync target for full sync.
2462 if (mdev
->state
.conn
== C_STANDALONE
&& mdev
->state
.role
== R_SECONDARY
) {
2463 retcode
= drbd_request_state(mdev
, NS(disk
, D_INCONSISTENT
));
2464 if (retcode
>= SS_SUCCESS
) {
2465 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
2466 "set_n_write from invalidate", BM_LOCKED_MASK
))
2467 retcode
= ERR_IO_MD_DISK
;
2470 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
2471 drbd_resume_io(mdev
);
2474 drbd_adm_finish(info
, retcode
);
2478 static int drbd_adm_simple_request_state(struct sk_buff
*skb
, struct genl_info
*info
,
2479 union drbd_state mask
, union drbd_state val
)
2481 enum drbd_ret_code retcode
;
2483 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2484 if (!adm_ctx
.reply_skb
)
2486 if (retcode
!= NO_ERROR
)
2489 retcode
= drbd_request_state(adm_ctx
.mdev
, mask
, val
);
2491 drbd_adm_finish(info
, retcode
);
2495 static int drbd_bmio_set_susp_al(struct drbd_conf
*mdev
)
2499 rv
= drbd_bmio_set_n_write(mdev
);
2500 drbd_suspend_al(mdev
);
2504 int drbd_adm_invalidate_peer(struct sk_buff
*skb
, struct genl_info
*info
)
2506 int retcode
; /* drbd_ret_code, drbd_state_rv */
2507 struct drbd_conf
*mdev
;
2509 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2510 if (!adm_ctx
.reply_skb
)
2512 if (retcode
!= NO_ERROR
)
2515 mdev
= adm_ctx
.mdev
;
2517 /* If there is still bitmap IO pending, probably because of a previous
2518 * resync just being finished, wait for it before requesting a new resync.
2519 * Also wait for it's after_state_ch(). */
2520 drbd_suspend_io(mdev
);
2521 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2522 drbd_flush_workqueue(mdev
);
2524 /* If we happen to be C_STANDALONE R_PRIMARY, just set all bits
2525 * in the bitmap. Otherwise, try to start a resync handshake
2526 * as sync source for full sync.
2528 if (mdev
->state
.conn
== C_STANDALONE
&& mdev
->state
.role
== R_PRIMARY
) {
2529 /* The peer will get a resync upon connect anyways. Just make that
2530 into a full resync. */
2531 retcode
= drbd_request_state(mdev
, NS(pdsk
, D_INCONSISTENT
));
2532 if (retcode
>= SS_SUCCESS
) {
2533 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_susp_al
,
2534 "set_n_write from invalidate_peer",
2535 BM_LOCKED_SET_ALLOWED
))
2536 retcode
= ERR_IO_MD_DISK
;
2539 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
));
2540 drbd_resume_io(mdev
);
2543 drbd_adm_finish(info
, retcode
);
2547 int drbd_adm_pause_sync(struct sk_buff
*skb
, struct genl_info
*info
)
2549 enum drbd_ret_code retcode
;
2551 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2552 if (!adm_ctx
.reply_skb
)
2554 if (retcode
!= NO_ERROR
)
2557 if (drbd_request_state(adm_ctx
.mdev
, NS(user_isp
, 1)) == SS_NOTHING_TO_DO
)
2558 retcode
= ERR_PAUSE_IS_SET
;
2560 drbd_adm_finish(info
, retcode
);
2564 int drbd_adm_resume_sync(struct sk_buff
*skb
, struct genl_info
*info
)
2566 union drbd_dev_state s
;
2567 enum drbd_ret_code retcode
;
2569 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2570 if (!adm_ctx
.reply_skb
)
2572 if (retcode
!= NO_ERROR
)
2575 if (drbd_request_state(adm_ctx
.mdev
, NS(user_isp
, 0)) == SS_NOTHING_TO_DO
) {
2576 s
= adm_ctx
.mdev
->state
;
2577 if (s
.conn
== C_PAUSED_SYNC_S
|| s
.conn
== C_PAUSED_SYNC_T
) {
2578 retcode
= s
.aftr_isp
? ERR_PIC_AFTER_DEP
:
2579 s
.peer_isp
? ERR_PIC_PEER_DEP
: ERR_PAUSE_IS_CLEAR
;
2581 retcode
= ERR_PAUSE_IS_CLEAR
;
2586 drbd_adm_finish(info
, retcode
);
2590 int drbd_adm_suspend_io(struct sk_buff
*skb
, struct genl_info
*info
)
2592 return drbd_adm_simple_request_state(skb
, info
, NS(susp
, 1));
2595 int drbd_adm_resume_io(struct sk_buff
*skb
, struct genl_info
*info
)
2597 struct drbd_conf
*mdev
;
2598 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2600 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2601 if (!adm_ctx
.reply_skb
)
2603 if (retcode
!= NO_ERROR
)
2606 mdev
= adm_ctx
.mdev
;
2607 if (test_bit(NEW_CUR_UUID
, &mdev
->flags
)) {
2608 drbd_uuid_new_current(mdev
);
2609 clear_bit(NEW_CUR_UUID
, &mdev
->flags
);
2611 drbd_suspend_io(mdev
);
2612 retcode
= drbd_request_state(mdev
, NS3(susp
, 0, susp_nod
, 0, susp_fen
, 0));
2613 if (retcode
== SS_SUCCESS
) {
2614 if (mdev
->state
.conn
< C_CONNECTED
)
2615 tl_clear(mdev
->tconn
);
2616 if (mdev
->state
.disk
== D_DISKLESS
|| mdev
->state
.disk
== D_FAILED
)
2617 tl_restart(mdev
->tconn
, FAIL_FROZEN_DISK_IO
);
2619 drbd_resume_io(mdev
);
2622 drbd_adm_finish(info
, retcode
);
2626 int drbd_adm_outdate(struct sk_buff
*skb
, struct genl_info
*info
)
2628 return drbd_adm_simple_request_state(skb
, info
, NS(disk
, D_OUTDATED
));
2631 int nla_put_drbd_cfg_context(struct sk_buff
*skb
, struct drbd_tconn
*tconn
, unsigned vnr
)
2634 nla
= nla_nest_start(skb
, DRBD_NLA_CFG_CONTEXT
);
2636 goto nla_put_failure
;
2637 if (vnr
!= VOLUME_UNSPECIFIED
&&
2638 nla_put_u32(skb
, T_ctx_volume
, vnr
))
2639 goto nla_put_failure
;
2640 if (nla_put_string(skb
, T_ctx_resource_name
, tconn
->name
))
2641 goto nla_put_failure
;
2642 if (tconn
->my_addr_len
&&
2643 nla_put(skb
, T_ctx_my_addr
, tconn
->my_addr_len
, &tconn
->my_addr
))
2644 goto nla_put_failure
;
2645 if (tconn
->peer_addr_len
&&
2646 nla_put(skb
, T_ctx_peer_addr
, tconn
->peer_addr_len
, &tconn
->peer_addr
))
2647 goto nla_put_failure
;
2648 nla_nest_end(skb
, nla
);
2653 nla_nest_cancel(skb
, nla
);
2657 int nla_put_status_info(struct sk_buff
*skb
, struct drbd_conf
*mdev
,
2658 const struct sib_info
*sib
)
2660 struct state_info
*si
= NULL
; /* for sizeof(si->member); */
2664 int exclude_sensitive
;
2666 /* If sib != NULL, this is drbd_bcast_event, which anyone can listen
2667 * to. So we better exclude_sensitive information.
2669 * If sib == NULL, this is drbd_adm_get_status, executed synchronously
2670 * in the context of the requesting user process. Exclude sensitive
2671 * information, unless current has superuser.
2673 * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and
2674 * relies on the current implementation of netlink_dump(), which
2675 * executes the dump callback successively from netlink_recvmsg(),
2676 * always in the context of the receiving process */
2677 exclude_sensitive
= sib
|| !capable(CAP_SYS_ADMIN
);
2679 got_ldev
= get_ldev(mdev
);
2681 /* We need to add connection name and volume number information still.
2682 * Minor number is in drbd_genlmsghdr. */
2683 if (nla_put_drbd_cfg_context(skb
, mdev
->tconn
, mdev
->vnr
))
2684 goto nla_put_failure
;
2686 if (res_opts_to_skb(skb
, &mdev
->tconn
->res_opts
, exclude_sensitive
))
2687 goto nla_put_failure
;
2691 struct disk_conf
*disk_conf
;
2693 disk_conf
= rcu_dereference(mdev
->ldev
->disk_conf
);
2694 err
= disk_conf_to_skb(skb
, disk_conf
, exclude_sensitive
);
2697 struct net_conf
*nc
;
2699 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
2701 err
= net_conf_to_skb(skb
, nc
, exclude_sensitive
);
2705 goto nla_put_failure
;
2707 nla
= nla_nest_start(skb
, DRBD_NLA_STATE_INFO
);
2709 goto nla_put_failure
;
2710 if (nla_put_u32(skb
, T_sib_reason
, sib
? sib
->sib_reason
: SIB_GET_STATUS_REPLY
) ||
2711 nla_put_u32(skb
, T_current_state
, mdev
->state
.i
) ||
2712 nla_put_u64(skb
, T_ed_uuid
, mdev
->ed_uuid
) ||
2713 nla_put_u64(skb
, T_capacity
, drbd_get_capacity(mdev
->this_bdev
)) ||
2714 nla_put_u64(skb
, T_send_cnt
, mdev
->send_cnt
) ||
2715 nla_put_u64(skb
, T_recv_cnt
, mdev
->recv_cnt
) ||
2716 nla_put_u64(skb
, T_read_cnt
, mdev
->read_cnt
) ||
2717 nla_put_u64(skb
, T_writ_cnt
, mdev
->writ_cnt
) ||
2718 nla_put_u64(skb
, T_al_writ_cnt
, mdev
->al_writ_cnt
) ||
2719 nla_put_u64(skb
, T_bm_writ_cnt
, mdev
->bm_writ_cnt
) ||
2720 nla_put_u32(skb
, T_ap_bio_cnt
, atomic_read(&mdev
->ap_bio_cnt
)) ||
2721 nla_put_u32(skb
, T_ap_pending_cnt
, atomic_read(&mdev
->ap_pending_cnt
)) ||
2722 nla_put_u32(skb
, T_rs_pending_cnt
, atomic_read(&mdev
->rs_pending_cnt
)))
2723 goto nla_put_failure
;
2728 spin_lock_irq(&mdev
->ldev
->md
.uuid_lock
);
2729 err
= nla_put(skb
, T_uuids
, sizeof(si
->uuids
), mdev
->ldev
->md
.uuid
);
2730 spin_unlock_irq(&mdev
->ldev
->md
.uuid_lock
);
2733 goto nla_put_failure
;
2735 if (nla_put_u32(skb
, T_disk_flags
, mdev
->ldev
->md
.flags
) ||
2736 nla_put_u64(skb
, T_bits_total
, drbd_bm_bits(mdev
)) ||
2737 nla_put_u64(skb
, T_bits_oos
, drbd_bm_total_weight(mdev
)))
2738 goto nla_put_failure
;
2739 if (C_SYNC_SOURCE
<= mdev
->state
.conn
&&
2740 C_PAUSED_SYNC_T
>= mdev
->state
.conn
) {
2741 if (nla_put_u64(skb
, T_bits_rs_total
, mdev
->rs_total
) ||
2742 nla_put_u64(skb
, T_bits_rs_failed
, mdev
->rs_failed
))
2743 goto nla_put_failure
;
2748 switch(sib
->sib_reason
) {
2749 case SIB_SYNC_PROGRESS
:
2750 case SIB_GET_STATUS_REPLY
:
2752 case SIB_STATE_CHANGE
:
2753 if (nla_put_u32(skb
, T_prev_state
, sib
->os
.i
) ||
2754 nla_put_u32(skb
, T_new_state
, sib
->ns
.i
))
2755 goto nla_put_failure
;
2757 case SIB_HELPER_POST
:
2758 if (nla_put_u32(skb
, T_helper_exit_code
,
2759 sib
->helper_exit_code
))
2760 goto nla_put_failure
;
2762 case SIB_HELPER_PRE
:
2763 if (nla_put_string(skb
, T_helper
, sib
->helper_name
))
2764 goto nla_put_failure
;
2768 nla_nest_end(skb
, nla
);
2778 int drbd_adm_get_status(struct sk_buff
*skb
, struct genl_info
*info
)
2780 enum drbd_ret_code retcode
;
2783 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2784 if (!adm_ctx
.reply_skb
)
2786 if (retcode
!= NO_ERROR
)
2789 err
= nla_put_status_info(adm_ctx
.reply_skb
, adm_ctx
.mdev
, NULL
);
2791 nlmsg_free(adm_ctx
.reply_skb
);
2795 drbd_adm_finish(info
, retcode
);
2799 int get_one_status(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2801 struct drbd_conf
*mdev
;
2802 struct drbd_genlmsghdr
*dh
;
2803 struct drbd_tconn
*pos
= (struct drbd_tconn
*)cb
->args
[0];
2804 struct drbd_tconn
*tconn
= NULL
;
2805 struct drbd_tconn
*tmp
;
2806 unsigned volume
= cb
->args
[1];
2808 /* Open coded, deferred, iteration:
2809 * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) {
2810 * idr_for_each_entry(&tconn->volumes, mdev, i) {
2814 * where tconn is cb->args[0];
2815 * and i is cb->args[1];
2817 * cb->args[2] indicates if we shall loop over all resources,
2818 * or just dump all volumes of a single resource.
2820 * This may miss entries inserted after this dump started,
2821 * or entries deleted before they are reached.
2823 * We need to make sure the mdev won't disappear while
2824 * we are looking at it, and revalidate our iterators
2825 * on each iteration.
2828 /* synchronize with conn_create()/conn_destroy() */
2830 /* revalidate iterator position */
2831 list_for_each_entry_rcu(tmp
, &drbd_tconns
, all_tconn
) {
2833 /* first iteration */
2845 mdev
= idr_get_next(&tconn
->volumes
, &volume
);
2847 /* No more volumes to dump on this tconn.
2848 * Advance tconn iterator. */
2849 pos
= list_entry_rcu(tconn
->all_tconn
.next
,
2850 struct drbd_tconn
, all_tconn
);
2851 /* Did we dump any volume on this tconn yet? */
2853 /* If we reached the end of the list,
2854 * or only a single resource dump was requested,
2856 if (&pos
->all_tconn
== &drbd_tconns
|| cb
->args
[2])
2864 dh
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
,
2865 cb
->nlh
->nlmsg_seq
, &drbd_genl_family
,
2866 NLM_F_MULTI
, DRBD_ADM_GET_STATUS
);
2871 /* This is a tconn without a single volume.
2872 * Suprisingly enough, it may have a network
2874 struct net_conf
*nc
;
2876 dh
->ret_code
= NO_ERROR
;
2877 if (nla_put_drbd_cfg_context(skb
, tconn
, VOLUME_UNSPECIFIED
))
2879 nc
= rcu_dereference(tconn
->net_conf
);
2880 if (nc
&& net_conf_to_skb(skb
, nc
, 1) != 0)
2885 D_ASSERT(mdev
->vnr
== volume
);
2886 D_ASSERT(mdev
->tconn
== tconn
);
2888 dh
->minor
= mdev_to_minor(mdev
);
2889 dh
->ret_code
= NO_ERROR
;
2891 if (nla_put_status_info(skb
, mdev
, NULL
)) {
2893 genlmsg_cancel(skb
, dh
);
2897 genlmsg_end(skb
, dh
);
2902 /* where to start the next iteration */
2903 cb
->args
[0] = (long)pos
;
2904 cb
->args
[1] = (pos
== tconn
) ? volume
+ 1 : 0;
2906 /* No more tconns/volumes/minors found results in an empty skb.
2907 * Which will terminate the dump. */
2912 * Request status of all resources, or of all volumes within a single resource.
2914 * This is a dump, as the answer may not fit in a single reply skb otherwise.
2915 * Which means we cannot use the family->attrbuf or other such members, because
2916 * dump is NOT protected by the genl_lock(). During dump, we only have access
2917 * to the incoming skb, and need to opencode "parsing" of the nlattr payload.
2919 * Once things are setup properly, we call into get_one_status().
2921 int drbd_adm_get_status_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2923 const unsigned hdrlen
= GENL_HDRLEN
+ GENL_MAGIC_FAMILY_HDRSZ
;
2925 const char *resource_name
;
2926 struct drbd_tconn
*tconn
;
2929 /* Is this a followup call? */
2931 /* ... of a single resource dump,
2932 * and the resource iterator has been advanced already? */
2933 if (cb
->args
[2] && cb
->args
[2] != cb
->args
[0])
2934 return 0; /* DONE. */
2938 /* First call (from netlink_dump_start). We need to figure out
2939 * which resource(s) the user wants us to dump. */
2940 nla
= nla_find(nlmsg_attrdata(cb
->nlh
, hdrlen
),
2941 nlmsg_attrlen(cb
->nlh
, hdrlen
),
2942 DRBD_NLA_CFG_CONTEXT
);
2944 /* No explicit context given. Dump all. */
2947 maxtype
= ARRAY_SIZE(drbd_cfg_context_nl_policy
) - 1;
2948 nla
= drbd_nla_find_nested(maxtype
, nla
, __nla_type(T_ctx_resource_name
));
2950 return PTR_ERR(nla
);
2951 /* context given, but no name present? */
2954 resource_name
= nla_data(nla
);
2955 tconn
= conn_get_by_name(resource_name
);
2960 kref_put(&tconn
->kref
, &conn_destroy
); /* get_one_status() (re)validates tconn by itself */
2962 /* prime iterators, and set "filter" mode mark:
2963 * only dump this tconn. */
2964 cb
->args
[0] = (long)tconn
;
2965 /* cb->args[1] = 0; passed in this way. */
2966 cb
->args
[2] = (long)tconn
;
2969 return get_one_status(skb
, cb
);
2972 int drbd_adm_get_timeout_type(struct sk_buff
*skb
, struct genl_info
*info
)
2974 enum drbd_ret_code retcode
;
2975 struct timeout_parms tp
;
2978 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2979 if (!adm_ctx
.reply_skb
)
2981 if (retcode
!= NO_ERROR
)
2985 adm_ctx
.mdev
->state
.pdsk
== D_OUTDATED
? UT_PEER_OUTDATED
:
2986 test_bit(USE_DEGR_WFC_T
, &adm_ctx
.mdev
->flags
) ? UT_DEGRADED
:
2989 err
= timeout_parms_to_priv_skb(adm_ctx
.reply_skb
, &tp
);
2991 nlmsg_free(adm_ctx
.reply_skb
);
2995 drbd_adm_finish(info
, retcode
);
2999 int drbd_adm_start_ov(struct sk_buff
*skb
, struct genl_info
*info
)
3001 struct drbd_conf
*mdev
;
3002 enum drbd_ret_code retcode
;
3003 struct start_ov_parms parms
;
3005 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
3006 if (!adm_ctx
.reply_skb
)
3008 if (retcode
!= NO_ERROR
)
3011 mdev
= adm_ctx
.mdev
;
3013 /* resume from last known position, if possible */
3014 parms
.ov_start_sector
= mdev
->ov_start_sector
;
3015 parms
.ov_stop_sector
= ULLONG_MAX
;
3016 if (info
->attrs
[DRBD_NLA_START_OV_PARMS
]) {
3017 int err
= start_ov_parms_from_attrs(&parms
, info
);
3019 retcode
= ERR_MANDATORY_TAG
;
3020 drbd_msg_put_info(from_attrs_err_to_txt(err
));
3024 /* w_make_ov_request expects position to be aligned */
3025 mdev
->ov_start_sector
= parms
.ov_start_sector
& ~(BM_SECT_PER_BIT
-1);
3026 mdev
->ov_stop_sector
= parms
.ov_stop_sector
;
3028 /* If there is still bitmap IO pending, e.g. previous resync or verify
3029 * just being finished, wait for it before requesting a new resync. */
3030 drbd_suspend_io(mdev
);
3031 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
3032 retcode
= drbd_request_state(mdev
,NS(conn
,C_VERIFY_S
));
3033 drbd_resume_io(mdev
);
3035 drbd_adm_finish(info
, retcode
);
3040 int drbd_adm_new_c_uuid(struct sk_buff
*skb
, struct genl_info
*info
)
3042 struct drbd_conf
*mdev
;
3043 enum drbd_ret_code retcode
;
3044 int skip_initial_sync
= 0;
3046 struct new_c_uuid_parms args
;
3048 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
3049 if (!adm_ctx
.reply_skb
)
3051 if (retcode
!= NO_ERROR
)
3054 mdev
= adm_ctx
.mdev
;
3055 memset(&args
, 0, sizeof(args
));
3056 if (info
->attrs
[DRBD_NLA_NEW_C_UUID_PARMS
]) {
3057 err
= new_c_uuid_parms_from_attrs(&args
, info
);
3059 retcode
= ERR_MANDATORY_TAG
;
3060 drbd_msg_put_info(from_attrs_err_to_txt(err
));
3065 mutex_lock(mdev
->state_mutex
); /* Protects us against serialized state changes. */
3067 if (!get_ldev(mdev
)) {
3068 retcode
= ERR_NO_DISK
;
3072 /* this is "skip initial sync", assume to be clean */
3073 if (mdev
->state
.conn
== C_CONNECTED
&& mdev
->tconn
->agreed_pro_version
>= 90 &&
3074 mdev
->ldev
->md
.uuid
[UI_CURRENT
] == UUID_JUST_CREATED
&& args
.clear_bm
) {
3075 dev_info(DEV
, "Preparing to skip initial sync\n");
3076 skip_initial_sync
= 1;
3077 } else if (mdev
->state
.conn
!= C_STANDALONE
) {
3078 retcode
= ERR_CONNECTED
;
3082 drbd_uuid_set(mdev
, UI_BITMAP
, 0); /* Rotate UI_BITMAP to History 1, etc... */
3083 drbd_uuid_new_current(mdev
); /* New current, previous to UI_BITMAP */
3085 if (args
.clear_bm
) {
3086 err
= drbd_bitmap_io(mdev
, &drbd_bmio_clear_n_write
,
3087 "clear_n_write from new_c_uuid", BM_LOCKED_MASK
);
3089 dev_err(DEV
, "Writing bitmap failed with %d\n",err
);
3090 retcode
= ERR_IO_MD_DISK
;
3092 if (skip_initial_sync
) {
3093 drbd_send_uuids_skip_initial_sync(mdev
);
3094 _drbd_uuid_set(mdev
, UI_BITMAP
, 0);
3095 drbd_print_uuids(mdev
, "cleared bitmap UUID");
3096 spin_lock_irq(&mdev
->tconn
->req_lock
);
3097 _drbd_set_state(_NS2(mdev
, disk
, D_UP_TO_DATE
, pdsk
, D_UP_TO_DATE
),
3099 spin_unlock_irq(&mdev
->tconn
->req_lock
);
3107 mutex_unlock(mdev
->state_mutex
);
3109 drbd_adm_finish(info
, retcode
);
3113 static enum drbd_ret_code
3114 drbd_check_resource_name(const char *name
)
3116 if (!name
|| !name
[0]) {
3117 drbd_msg_put_info("resource name missing");
3118 return ERR_MANDATORY_TAG
;
3120 /* if we want to use these in sysfs/configfs/debugfs some day,
3121 * we must not allow slashes */
3122 if (strchr(name
, '/')) {
3123 drbd_msg_put_info("invalid resource name");
3124 return ERR_INVALID_REQUEST
;
3129 int drbd_adm_new_resource(struct sk_buff
*skb
, struct genl_info
*info
)
3131 enum drbd_ret_code retcode
;
3132 struct res_opts res_opts
;
3135 retcode
= drbd_adm_prepare(skb
, info
, 0);
3136 if (!adm_ctx
.reply_skb
)
3138 if (retcode
!= NO_ERROR
)
3141 set_res_opts_defaults(&res_opts
);
3142 err
= res_opts_from_attrs(&res_opts
, info
);
3143 if (err
&& err
!= -ENOMSG
) {
3144 retcode
= ERR_MANDATORY_TAG
;
3145 drbd_msg_put_info(from_attrs_err_to_txt(err
));
3149 retcode
= drbd_check_resource_name(adm_ctx
.resource_name
);
3150 if (retcode
!= NO_ERROR
)
3153 if (adm_ctx
.tconn
) {
3154 if (info
->nlhdr
->nlmsg_flags
& NLM_F_EXCL
) {
3155 retcode
= ERR_INVALID_REQUEST
;
3156 drbd_msg_put_info("resource exists");
3158 /* else: still NO_ERROR */
3162 if (!conn_create(adm_ctx
.resource_name
, &res_opts
))
3163 retcode
= ERR_NOMEM
;
3165 drbd_adm_finish(info
, retcode
);
3169 int drbd_adm_add_minor(struct sk_buff
*skb
, struct genl_info
*info
)
3171 struct drbd_genlmsghdr
*dh
= info
->userhdr
;
3172 enum drbd_ret_code retcode
;
3174 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
3175 if (!adm_ctx
.reply_skb
)
3177 if (retcode
!= NO_ERROR
)
3180 if (dh
->minor
> MINORMASK
) {
3181 drbd_msg_put_info("requested minor out of range");
3182 retcode
= ERR_INVALID_REQUEST
;
3185 if (adm_ctx
.volume
> DRBD_VOLUME_MAX
) {
3186 drbd_msg_put_info("requested volume id out of range");
3187 retcode
= ERR_INVALID_REQUEST
;
3191 /* drbd_adm_prepare made sure already
3192 * that mdev->tconn and mdev->vnr match the request. */
3194 if (info
->nlhdr
->nlmsg_flags
& NLM_F_EXCL
)
3195 retcode
= ERR_MINOR_EXISTS
;
3196 /* else: still NO_ERROR */
3200 retcode
= conn_new_minor(adm_ctx
.tconn
, dh
->minor
, adm_ctx
.volume
);
3202 drbd_adm_finish(info
, retcode
);
3206 static enum drbd_ret_code
adm_delete_minor(struct drbd_conf
*mdev
)
3208 if (mdev
->state
.disk
== D_DISKLESS
&&
3209 /* no need to be mdev->state.conn == C_STANDALONE &&
3210 * we may want to delete a minor from a live replication group.
3212 mdev
->state
.role
== R_SECONDARY
) {
3213 _drbd_request_state(mdev
, NS(conn
, C_WF_REPORT_PARAMS
),
3214 CS_VERBOSE
+ CS_WAIT_COMPLETE
);
3215 idr_remove(&mdev
->tconn
->volumes
, mdev
->vnr
);
3216 idr_remove(&minors
, mdev_to_minor(mdev
));
3217 destroy_workqueue(mdev
->submit
.wq
);
3218 del_gendisk(mdev
->vdisk
);
3220 kref_put(&mdev
->kref
, &drbd_minor_destroy
);
3223 return ERR_MINOR_CONFIGURED
;
3226 int drbd_adm_delete_minor(struct sk_buff
*skb
, struct genl_info
*info
)
3228 enum drbd_ret_code retcode
;
3230 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
3231 if (!adm_ctx
.reply_skb
)
3233 if (retcode
!= NO_ERROR
)
3236 retcode
= adm_delete_minor(adm_ctx
.mdev
);
3238 drbd_adm_finish(info
, retcode
);
3242 int drbd_adm_down(struct sk_buff
*skb
, struct genl_info
*info
)
3244 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
3245 struct drbd_conf
*mdev
;
3248 retcode
= drbd_adm_prepare(skb
, info
, 0);
3249 if (!adm_ctx
.reply_skb
)
3251 if (retcode
!= NO_ERROR
)
3254 if (!adm_ctx
.tconn
) {
3255 retcode
= ERR_RES_NOT_KNOWN
;
3260 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3261 retcode
= drbd_set_role(mdev
, R_SECONDARY
, 0);
3262 if (retcode
< SS_SUCCESS
) {
3263 drbd_msg_put_info("failed to demote");
3268 retcode
= conn_try_disconnect(adm_ctx
.tconn
, 0);
3269 if (retcode
< SS_SUCCESS
) {
3270 drbd_msg_put_info("failed to disconnect");
3275 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3276 retcode
= adm_detach(mdev
, 0);
3277 if (retcode
< SS_SUCCESS
|| retcode
> NO_ERROR
) {
3278 drbd_msg_put_info("failed to detach");
3283 /* If we reach this, all volumes (of this tconn) are Secondary,
3284 * Disconnected, Diskless, aka Unconfigured. Make sure all threads have
3285 * actually stopped, state handling only does drbd_thread_stop_nowait(). */
3286 drbd_thread_stop(&adm_ctx
.tconn
->worker
);
3288 /* Now, nothing can fail anymore */
3290 /* delete volumes */
3291 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3292 retcode
= adm_delete_minor(mdev
);
3293 if (retcode
!= NO_ERROR
) {
3294 /* "can not happen" */
3295 drbd_msg_put_info("failed to delete volume");
3300 /* delete connection */
3301 if (conn_lowest_minor(adm_ctx
.tconn
) < 0) {
3302 list_del_rcu(&adm_ctx
.tconn
->all_tconn
);
3304 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
3308 /* "can not happen" */
3309 retcode
= ERR_RES_IN_USE
;
3310 drbd_msg_put_info("failed to delete connection");
3314 drbd_adm_finish(info
, retcode
);
3318 int drbd_adm_del_resource(struct sk_buff
*skb
, struct genl_info
*info
)
3320 enum drbd_ret_code retcode
;
3322 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
3323 if (!adm_ctx
.reply_skb
)
3325 if (retcode
!= NO_ERROR
)
3328 if (conn_lowest_minor(adm_ctx
.tconn
) < 0) {
3329 list_del_rcu(&adm_ctx
.tconn
->all_tconn
);
3331 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
3335 retcode
= ERR_RES_IN_USE
;
3338 if (retcode
== NO_ERROR
)
3339 drbd_thread_stop(&adm_ctx
.tconn
->worker
);
3341 drbd_adm_finish(info
, retcode
);
3345 void drbd_bcast_event(struct drbd_conf
*mdev
, const struct sib_info
*sib
)
3347 static atomic_t drbd_genl_seq
= ATOMIC_INIT(2); /* two. */
3348 struct sk_buff
*msg
;
3349 struct drbd_genlmsghdr
*d_out
;
3353 if (sib
->sib_reason
== SIB_SYNC_PROGRESS
) {
3354 if (time_after(jiffies
, mdev
->rs_last_bcast
+ HZ
))
3355 mdev
->rs_last_bcast
= jiffies
;
3360 seq
= atomic_inc_return(&drbd_genl_seq
);
3361 msg
= genlmsg_new(NLMSG_GOODSIZE
, GFP_NOIO
);
3366 d_out
= genlmsg_put(msg
, 0, seq
, &drbd_genl_family
, 0, DRBD_EVENT
);
3367 if (!d_out
) /* cannot happen, but anyways. */
3368 goto nla_put_failure
;
3369 d_out
->minor
= mdev_to_minor(mdev
);
3370 d_out
->ret_code
= NO_ERROR
;
3372 if (nla_put_status_info(msg
, mdev
, sib
))
3373 goto nla_put_failure
;
3374 genlmsg_end(msg
, d_out
);
3375 err
= drbd_genl_multicast_events(msg
, 0);
3376 /* msg has been consumed or freed in netlink_broadcast() */
3377 if (err
&& err
!= -ESRCH
)
3385 dev_err(DEV
, "Error %d while broadcasting event. "
3386 "Event seq:%u sib_reason:%u\n",
3387 err
, seq
, sib
->sib_reason
);