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
;
1385 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
1387 if (new_disk_conf
->fencing
== FP_STONITH
&& nc
->wire_protocol
== DRBD_PROT_A
) {
1389 retcode
= ERR_STONITH_AND_PROT_A
;
1395 bdev
= blkdev_get_by_path(new_disk_conf
->backing_dev
,
1396 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
, mdev
);
1398 dev_err(DEV
, "open(\"%s\") failed with %ld\n", new_disk_conf
->backing_dev
,
1400 retcode
= ERR_OPEN_DISK
;
1403 nbc
->backing_bdev
= bdev
;
1406 * meta_dev_idx >= 0: external fixed size, possibly multiple
1407 * drbd sharing one meta device. TODO in that case, paranoia
1408 * check that [md_bdev, meta_dev_idx] is not yet used by some
1409 * other drbd minor! (if you use drbd.conf + drbdadm, that
1410 * should check it for you already; but if you don't, or
1411 * someone fooled it, we need to double check here)
1413 bdev
= blkdev_get_by_path(new_disk_conf
->meta_dev
,
1414 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
,
1415 (new_disk_conf
->meta_dev_idx
< 0) ?
1416 (void *)mdev
: (void *)drbd_m_holder
);
1418 dev_err(DEV
, "open(\"%s\") failed with %ld\n", new_disk_conf
->meta_dev
,
1420 retcode
= ERR_OPEN_MD_DISK
;
1423 nbc
->md_bdev
= bdev
;
1425 if ((nbc
->backing_bdev
== nbc
->md_bdev
) !=
1426 (new_disk_conf
->meta_dev_idx
== DRBD_MD_INDEX_INTERNAL
||
1427 new_disk_conf
->meta_dev_idx
== DRBD_MD_INDEX_FLEX_INT
)) {
1428 retcode
= ERR_MD_IDX_INVALID
;
1432 resync_lru
= lc_create("resync", drbd_bm_ext_cache
,
1433 1, 61, sizeof(struct bm_extent
),
1434 offsetof(struct bm_extent
, lce
));
1436 retcode
= ERR_NOMEM
;
1440 /* Read our meta data super block early.
1441 * This also sets other on-disk offsets. */
1442 retcode
= drbd_md_read(mdev
, nbc
);
1443 if (retcode
!= NO_ERROR
)
1446 if (new_disk_conf
->al_extents
< DRBD_AL_EXTENTS_MIN
)
1447 new_disk_conf
->al_extents
= DRBD_AL_EXTENTS_MIN
;
1448 if (new_disk_conf
->al_extents
> drbd_al_extents_max(nbc
))
1449 new_disk_conf
->al_extents
= drbd_al_extents_max(nbc
);
1451 if (drbd_get_max_capacity(nbc
) < new_disk_conf
->disk_size
) {
1452 dev_err(DEV
, "max capacity %llu smaller than disk size %llu\n",
1453 (unsigned long long) drbd_get_max_capacity(nbc
),
1454 (unsigned long long) new_disk_conf
->disk_size
);
1455 retcode
= ERR_DISK_TOO_SMALL
;
1459 if (new_disk_conf
->meta_dev_idx
< 0) {
1460 max_possible_sectors
= DRBD_MAX_SECTORS_FLEX
;
1461 /* at least one MB, otherwise it does not make sense */
1462 min_md_device_sectors
= (2<<10);
1464 max_possible_sectors
= DRBD_MAX_SECTORS
;
1465 min_md_device_sectors
= MD_128MB_SECT
* (new_disk_conf
->meta_dev_idx
+ 1);
1468 if (drbd_get_capacity(nbc
->md_bdev
) < min_md_device_sectors
) {
1469 retcode
= ERR_MD_DISK_TOO_SMALL
;
1470 dev_warn(DEV
, "refusing attach: md-device too small, "
1471 "at least %llu sectors needed for this meta-disk type\n",
1472 (unsigned long long) min_md_device_sectors
);
1476 /* Make sure the new disk is big enough
1477 * (we may currently be R_PRIMARY with no local disk...) */
1478 if (drbd_get_max_capacity(nbc
) <
1479 drbd_get_capacity(mdev
->this_bdev
)) {
1480 retcode
= ERR_DISK_TOO_SMALL
;
1484 nbc
->known_size
= drbd_get_capacity(nbc
->backing_bdev
);
1486 if (nbc
->known_size
> max_possible_sectors
) {
1487 dev_warn(DEV
, "==> truncating very big lower level device "
1488 "to currently maximum possible %llu sectors <==\n",
1489 (unsigned long long) max_possible_sectors
);
1490 if (new_disk_conf
->meta_dev_idx
>= 0)
1491 dev_warn(DEV
, "==>> using internal or flexible "
1492 "meta data may help <<==\n");
1495 drbd_suspend_io(mdev
);
1496 /* also wait for the last barrier ack. */
1497 /* FIXME see also https://daiquiri.linbit/cgi-bin/bugzilla/show_bug.cgi?id=171
1498 * We need a way to either ignore barrier acks for barriers sent before a device
1499 * was attached, or a way to wait for all pending barrier acks to come in.
1500 * As barriers are counted per resource,
1501 * we'd need to suspend io on all devices of a resource.
1503 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_pending_cnt
) || drbd_suspended(mdev
));
1504 /* and for any other previously queued work */
1505 drbd_flush_workqueue(mdev
);
1507 rv
= _drbd_request_state(mdev
, NS(disk
, D_ATTACHING
), CS_VERBOSE
);
1508 retcode
= rv
; /* FIXME: Type mismatch. */
1509 drbd_resume_io(mdev
);
1510 if (rv
< SS_SUCCESS
)
1513 if (!get_ldev_if_state(mdev
, D_ATTACHING
))
1514 goto force_diskless
;
1516 if (!mdev
->bitmap
) {
1517 if (drbd_bm_init(mdev
)) {
1518 retcode
= ERR_NOMEM
;
1519 goto force_diskless_dec
;
1523 if (mdev
->state
.conn
< C_CONNECTED
&&
1524 mdev
->state
.role
== R_PRIMARY
&&
1525 (mdev
->ed_uuid
& ~((u64
)1)) != (nbc
->md
.uuid
[UI_CURRENT
] & ~((u64
)1))) {
1526 dev_err(DEV
, "Can only attach to data with current UUID=%016llX\n",
1527 (unsigned long long)mdev
->ed_uuid
);
1528 retcode
= ERR_DATA_NOT_CURRENT
;
1529 goto force_diskless_dec
;
1532 /* Since we are diskless, fix the activity log first... */
1533 if (drbd_check_al_size(mdev
, new_disk_conf
)) {
1534 retcode
= ERR_NOMEM
;
1535 goto force_diskless_dec
;
1538 /* Prevent shrinking of consistent devices ! */
1539 if (drbd_md_test_flag(nbc
, MDF_CONSISTENT
) &&
1540 drbd_new_dev_size(mdev
, nbc
, nbc
->disk_conf
->disk_size
, 0) < nbc
->md
.la_size_sect
) {
1541 dev_warn(DEV
, "refusing to truncate a consistent device\n");
1542 retcode
= ERR_DISK_TOO_SMALL
;
1543 goto force_diskless_dec
;
1546 /* Reset the "barriers don't work" bits here, then force meta data to
1547 * be written, to ensure we determine if barriers are supported. */
1548 if (new_disk_conf
->md_flushes
)
1549 clear_bit(MD_NO_FUA
, &mdev
->flags
);
1551 set_bit(MD_NO_FUA
, &mdev
->flags
);
1553 /* Point of no return reached.
1554 * Devices and memory are no longer released by error cleanup below.
1555 * now mdev takes over responsibility, and the state engine should
1556 * clean it up somewhere. */
1557 D_ASSERT(mdev
->ldev
== NULL
);
1559 mdev
->resync
= resync_lru
;
1560 mdev
->rs_plan_s
= new_plan
;
1563 new_disk_conf
= NULL
;
1566 drbd_bump_write_ordering(mdev
->tconn
, WO_bdev_flush
);
1568 if (drbd_md_test_flag(mdev
->ldev
, MDF_CRASHED_PRIMARY
))
1569 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1571 clear_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1573 if (drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1574 !(mdev
->state
.role
== R_PRIMARY
&& mdev
->tconn
->susp_nod
))
1575 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1582 drbd_reconsider_max_bio_size(mdev
);
1584 /* If I am currently not R_PRIMARY,
1585 * but meta data primary indicator is set,
1586 * I just now recover from a hard crash,
1587 * and have been R_PRIMARY before that crash.
1589 * Now, if I had no connection before that crash
1590 * (have been degraded R_PRIMARY), chances are that
1591 * I won't find my peer now either.
1593 * In that case, and _only_ in that case,
1594 * we use the degr-wfc-timeout instead of the default,
1595 * so we can automatically recover from a crash of a
1596 * degraded but active "cluster" after a certain timeout.
1598 clear_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1599 if (mdev
->state
.role
!= R_PRIMARY
&&
1600 drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1601 !drbd_md_test_flag(mdev
->ldev
, MDF_CONNECTED_IND
))
1602 set_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1604 dd
= drbd_determine_dev_size(mdev
, 0);
1605 if (dd
== dev_size_error
) {
1606 retcode
= ERR_NOMEM_BITMAP
;
1607 goto force_diskless_dec
;
1608 } else if (dd
== grew
)
1609 set_bit(RESYNC_AFTER_NEG
, &mdev
->flags
);
1611 if (drbd_md_test_flag(mdev
->ldev
, MDF_FULL_SYNC
) ||
1612 (test_bit(CRASHED_PRIMARY
, &mdev
->flags
) &&
1613 drbd_md_test_flag(mdev
->ldev
, MDF_AL_DISABLED
))) {
1614 dev_info(DEV
, "Assuming that all blocks are out of sync "
1615 "(aka FullSync)\n");
1616 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
1617 "set_n_write from attaching", BM_LOCKED_MASK
)) {
1618 retcode
= ERR_IO_MD_DISK
;
1619 goto force_diskless_dec
;
1622 if (drbd_bitmap_io(mdev
, &drbd_bm_read
,
1623 "read from attaching", BM_LOCKED_MASK
)) {
1624 retcode
= ERR_IO_MD_DISK
;
1625 goto force_diskless_dec
;
1629 if (_drbd_bm_total_weight(mdev
) == drbd_bm_bits(mdev
))
1630 drbd_suspend_al(mdev
); /* IO is still suspended here... */
1632 spin_lock_irq(&mdev
->tconn
->req_lock
);
1633 os
= drbd_read_state(mdev
);
1635 /* If MDF_CONSISTENT is not set go into inconsistent state,
1636 otherwise investigate MDF_WasUpToDate...
1637 If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
1638 otherwise into D_CONSISTENT state.
1640 if (drbd_md_test_flag(mdev
->ldev
, MDF_CONSISTENT
)) {
1641 if (drbd_md_test_flag(mdev
->ldev
, MDF_WAS_UP_TO_DATE
))
1642 ns
.disk
= D_CONSISTENT
;
1644 ns
.disk
= D_OUTDATED
;
1646 ns
.disk
= D_INCONSISTENT
;
1649 if (drbd_md_test_flag(mdev
->ldev
, MDF_PEER_OUT_DATED
))
1650 ns
.pdsk
= D_OUTDATED
;
1653 if (ns
.disk
== D_CONSISTENT
&&
1654 (ns
.pdsk
== D_OUTDATED
|| rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
== FP_DONT_CARE
))
1655 ns
.disk
= D_UP_TO_DATE
;
1657 /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
1658 MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
1659 this point, because drbd_request_state() modifies these
1662 if (rcu_dereference(mdev
->ldev
->disk_conf
)->al_updates
)
1663 mdev
->ldev
->md
.flags
&= ~MDF_AL_DISABLED
;
1665 mdev
->ldev
->md
.flags
|= MDF_AL_DISABLED
;
1669 /* In case we are C_CONNECTED postpone any decision on the new disk
1670 state after the negotiation phase. */
1671 if (mdev
->state
.conn
== C_CONNECTED
) {
1672 mdev
->new_state_tmp
.i
= ns
.i
;
1674 ns
.disk
= D_NEGOTIATING
;
1676 /* We expect to receive up-to-date UUIDs soon.
1677 To avoid a race in receive_state, free p_uuid while
1678 holding req_lock. I.e. atomic with the state change */
1679 kfree(mdev
->p_uuid
);
1680 mdev
->p_uuid
= NULL
;
1683 rv
= _drbd_set_state(mdev
, ns
, CS_VERBOSE
, NULL
);
1684 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1686 if (rv
< SS_SUCCESS
)
1687 goto force_diskless_dec
;
1689 mod_timer(&mdev
->request_timer
, jiffies
+ HZ
);
1691 if (mdev
->state
.role
== R_PRIMARY
)
1692 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
1694 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
1696 drbd_md_mark_dirty(mdev
);
1699 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1701 conn_reconfig_done(mdev
->tconn
);
1702 drbd_adm_finish(info
, retcode
);
1708 drbd_force_state(mdev
, NS(disk
, D_DISKLESS
));
1711 conn_reconfig_done(mdev
->tconn
);
1713 if (nbc
->backing_bdev
)
1714 blkdev_put(nbc
->backing_bdev
,
1715 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1717 blkdev_put(nbc
->md_bdev
,
1718 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1721 kfree(new_disk_conf
);
1722 lc_destroy(resync_lru
);
1726 drbd_adm_finish(info
, retcode
);
1730 static int adm_detach(struct drbd_conf
*mdev
, int force
)
1732 enum drbd_state_rv retcode
;
1736 set_bit(FORCE_DETACH
, &mdev
->flags
);
1737 drbd_force_state(mdev
, NS(disk
, D_FAILED
));
1738 retcode
= SS_SUCCESS
;
1742 drbd_suspend_io(mdev
); /* so no-one is stuck in drbd_al_begin_io */
1743 drbd_md_get_buffer(mdev
); /* make sure there is no in-flight meta-data IO */
1744 retcode
= drbd_request_state(mdev
, NS(disk
, D_FAILED
));
1745 drbd_md_put_buffer(mdev
);
1746 /* D_FAILED will transition to DISKLESS. */
1747 ret
= wait_event_interruptible(mdev
->misc_wait
,
1748 mdev
->state
.disk
!= D_FAILED
);
1749 drbd_resume_io(mdev
);
1750 if ((int)retcode
== (int)SS_IS_DISKLESS
)
1751 retcode
= SS_NOTHING_TO_DO
;
1758 /* Detaching the disk is a process in multiple stages. First we need to lock
1759 * out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
1760 * Then we transition to D_DISKLESS, and wait for put_ldev() to return all
1761 * internal references as well.
1762 * Only then we have finally detached. */
1763 int drbd_adm_detach(struct sk_buff
*skb
, struct genl_info
*info
)
1765 enum drbd_ret_code retcode
;
1766 struct detach_parms parms
= { };
1769 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1770 if (!adm_ctx
.reply_skb
)
1772 if (retcode
!= NO_ERROR
)
1775 if (info
->attrs
[DRBD_NLA_DETACH_PARMS
]) {
1776 err
= detach_parms_from_attrs(&parms
, info
);
1778 retcode
= ERR_MANDATORY_TAG
;
1779 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1784 retcode
= adm_detach(adm_ctx
.mdev
, parms
.force_detach
);
1786 drbd_adm_finish(info
, retcode
);
1790 static bool conn_resync_running(struct drbd_tconn
*tconn
)
1792 struct drbd_conf
*mdev
;
1797 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
1798 if (mdev
->state
.conn
== C_SYNC_SOURCE
||
1799 mdev
->state
.conn
== C_SYNC_TARGET
||
1800 mdev
->state
.conn
== C_PAUSED_SYNC_S
||
1801 mdev
->state
.conn
== C_PAUSED_SYNC_T
) {
1811 static bool conn_ov_running(struct drbd_tconn
*tconn
)
1813 struct drbd_conf
*mdev
;
1818 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
1819 if (mdev
->state
.conn
== C_VERIFY_S
||
1820 mdev
->state
.conn
== C_VERIFY_T
) {
1830 static enum drbd_ret_code
1831 _check_net_options(struct drbd_tconn
*tconn
, struct net_conf
*old_conf
, struct net_conf
*new_conf
)
1833 struct drbd_conf
*mdev
;
1836 if (old_conf
&& tconn
->cstate
== C_WF_REPORT_PARAMS
&& tconn
->agreed_pro_version
< 100) {
1837 if (new_conf
->wire_protocol
!= old_conf
->wire_protocol
)
1838 return ERR_NEED_APV_100
;
1840 if (new_conf
->two_primaries
!= old_conf
->two_primaries
)
1841 return ERR_NEED_APV_100
;
1843 if (strcmp(new_conf
->integrity_alg
, old_conf
->integrity_alg
))
1844 return ERR_NEED_APV_100
;
1847 if (!new_conf
->two_primaries
&&
1848 conn_highest_role(tconn
) == R_PRIMARY
&&
1849 conn_highest_peer(tconn
) == R_PRIMARY
)
1850 return ERR_NEED_ALLOW_TWO_PRI
;
1852 if (new_conf
->two_primaries
&&
1853 (new_conf
->wire_protocol
!= DRBD_PROT_C
))
1854 return ERR_NOT_PROTO_C
;
1856 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1857 if (get_ldev(mdev
)) {
1858 enum drbd_fencing_p fp
= rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
;
1860 if (new_conf
->wire_protocol
== DRBD_PROT_A
&& fp
== FP_STONITH
)
1861 return ERR_STONITH_AND_PROT_A
;
1863 if (mdev
->state
.role
== R_PRIMARY
&& new_conf
->discard_my_data
)
1864 return ERR_DISCARD_IMPOSSIBLE
;
1867 if (new_conf
->on_congestion
!= OC_BLOCK
&& new_conf
->wire_protocol
!= DRBD_PROT_A
)
1868 return ERR_CONG_NOT_PROTO_A
;
1873 static enum drbd_ret_code
1874 check_net_options(struct drbd_tconn
*tconn
, struct net_conf
*new_conf
)
1876 static enum drbd_ret_code rv
;
1877 struct drbd_conf
*mdev
;
1881 rv
= _check_net_options(tconn
, rcu_dereference(tconn
->net_conf
), new_conf
);
1884 /* tconn->volumes protected by genl_lock() here */
1885 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1886 if (!mdev
->bitmap
) {
1887 if(drbd_bm_init(mdev
))
1896 struct crypto_hash
*verify_tfm
;
1897 struct crypto_hash
*csums_tfm
;
1898 struct crypto_hash
*cram_hmac_tfm
;
1899 struct crypto_hash
*integrity_tfm
;
1903 alloc_hash(struct crypto_hash
**tfm
, char *tfm_name
, int err_alg
)
1908 *tfm
= crypto_alloc_hash(tfm_name
, 0, CRYPTO_ALG_ASYNC
);
1917 static enum drbd_ret_code
1918 alloc_crypto(struct crypto
*crypto
, struct net_conf
*new_conf
)
1920 char hmac_name
[CRYPTO_MAX_ALG_NAME
];
1921 enum drbd_ret_code rv
;
1923 rv
= alloc_hash(&crypto
->csums_tfm
, new_conf
->csums_alg
,
1927 rv
= alloc_hash(&crypto
->verify_tfm
, new_conf
->verify_alg
,
1931 rv
= alloc_hash(&crypto
->integrity_tfm
, new_conf
->integrity_alg
,
1935 if (new_conf
->cram_hmac_alg
[0] != 0) {
1936 snprintf(hmac_name
, CRYPTO_MAX_ALG_NAME
, "hmac(%s)",
1937 new_conf
->cram_hmac_alg
);
1939 rv
= alloc_hash(&crypto
->cram_hmac_tfm
, hmac_name
,
1946 static void free_crypto(struct crypto
*crypto
)
1948 crypto_free_hash(crypto
->cram_hmac_tfm
);
1949 crypto_free_hash(crypto
->integrity_tfm
);
1950 crypto_free_hash(crypto
->csums_tfm
);
1951 crypto_free_hash(crypto
->verify_tfm
);
1954 int drbd_adm_net_opts(struct sk_buff
*skb
, struct genl_info
*info
)
1956 enum drbd_ret_code retcode
;
1957 struct drbd_tconn
*tconn
;
1958 struct net_conf
*old_conf
, *new_conf
= NULL
;
1960 int ovr
; /* online verify running */
1961 int rsr
; /* re-sync running */
1962 struct crypto crypto
= { };
1964 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONNECTION
);
1965 if (!adm_ctx
.reply_skb
)
1967 if (retcode
!= NO_ERROR
)
1970 tconn
= adm_ctx
.tconn
;
1972 new_conf
= kzalloc(sizeof(struct net_conf
), GFP_KERNEL
);
1974 retcode
= ERR_NOMEM
;
1978 conn_reconfig_start(tconn
);
1980 mutex_lock(&tconn
->data
.mutex
);
1981 mutex_lock(&tconn
->conf_update
);
1982 old_conf
= tconn
->net_conf
;
1985 drbd_msg_put_info("net conf missing, try connect");
1986 retcode
= ERR_INVALID_REQUEST
;
1990 *new_conf
= *old_conf
;
1991 if (should_set_defaults(info
))
1992 set_net_conf_defaults(new_conf
);
1994 err
= net_conf_from_attrs_for_change(new_conf
, info
);
1995 if (err
&& err
!= -ENOMSG
) {
1996 retcode
= ERR_MANDATORY_TAG
;
1997 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2001 retcode
= check_net_options(tconn
, new_conf
);
2002 if (retcode
!= NO_ERROR
)
2005 /* re-sync running */
2006 rsr
= conn_resync_running(tconn
);
2007 if (rsr
&& strcmp(new_conf
->csums_alg
, old_conf
->csums_alg
)) {
2008 retcode
= ERR_CSUMS_RESYNC_RUNNING
;
2012 /* online verify running */
2013 ovr
= conn_ov_running(tconn
);
2014 if (ovr
&& strcmp(new_conf
->verify_alg
, old_conf
->verify_alg
)) {
2015 retcode
= ERR_VERIFY_RUNNING
;
2019 retcode
= alloc_crypto(&crypto
, new_conf
);
2020 if (retcode
!= NO_ERROR
)
2023 rcu_assign_pointer(tconn
->net_conf
, new_conf
);
2026 crypto_free_hash(tconn
->csums_tfm
);
2027 tconn
->csums_tfm
= crypto
.csums_tfm
;
2028 crypto
.csums_tfm
= NULL
;
2031 crypto_free_hash(tconn
->verify_tfm
);
2032 tconn
->verify_tfm
= crypto
.verify_tfm
;
2033 crypto
.verify_tfm
= NULL
;
2036 crypto_free_hash(tconn
->integrity_tfm
);
2037 tconn
->integrity_tfm
= crypto
.integrity_tfm
;
2038 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
&& tconn
->agreed_pro_version
>= 100)
2039 /* Do this without trying to take tconn->data.mutex again. */
2040 __drbd_send_protocol(tconn
, P_PROTOCOL_UPDATE
);
2042 crypto_free_hash(tconn
->cram_hmac_tfm
);
2043 tconn
->cram_hmac_tfm
= crypto
.cram_hmac_tfm
;
2045 mutex_unlock(&tconn
->conf_update
);
2046 mutex_unlock(&tconn
->data
.mutex
);
2050 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
)
2051 drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn
)));
2056 mutex_unlock(&tconn
->conf_update
);
2057 mutex_unlock(&tconn
->data
.mutex
);
2058 free_crypto(&crypto
);
2061 conn_reconfig_done(tconn
);
2063 drbd_adm_finish(info
, retcode
);
2067 int drbd_adm_connect(struct sk_buff
*skb
, struct genl_info
*info
)
2069 struct drbd_conf
*mdev
;
2070 struct net_conf
*old_conf
, *new_conf
= NULL
;
2071 struct crypto crypto
= { };
2072 struct drbd_tconn
*tconn
;
2073 enum drbd_ret_code retcode
;
2077 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
2079 if (!adm_ctx
.reply_skb
)
2081 if (retcode
!= NO_ERROR
)
2083 if (!(adm_ctx
.my_addr
&& adm_ctx
.peer_addr
)) {
2084 drbd_msg_put_info("connection endpoint(s) missing");
2085 retcode
= ERR_INVALID_REQUEST
;
2089 /* No need for _rcu here. All reconfiguration is
2090 * strictly serialized on genl_lock(). We are protected against
2091 * concurrent reconfiguration/addition/deletion */
2092 list_for_each_entry(tconn
, &drbd_tconns
, all_tconn
) {
2093 if (nla_len(adm_ctx
.my_addr
) == tconn
->my_addr_len
&&
2094 !memcmp(nla_data(adm_ctx
.my_addr
), &tconn
->my_addr
, tconn
->my_addr_len
)) {
2095 retcode
= ERR_LOCAL_ADDR
;
2099 if (nla_len(adm_ctx
.peer_addr
) == tconn
->peer_addr_len
&&
2100 !memcmp(nla_data(adm_ctx
.peer_addr
), &tconn
->peer_addr
, tconn
->peer_addr_len
)) {
2101 retcode
= ERR_PEER_ADDR
;
2106 tconn
= adm_ctx
.tconn
;
2107 conn_reconfig_start(tconn
);
2109 if (tconn
->cstate
> C_STANDALONE
) {
2110 retcode
= ERR_NET_CONFIGURED
;
2114 /* allocation not in the IO path, drbdsetup / netlink process context */
2115 new_conf
= kzalloc(sizeof(*new_conf
), GFP_KERNEL
);
2117 retcode
= ERR_NOMEM
;
2121 set_net_conf_defaults(new_conf
);
2123 err
= net_conf_from_attrs(new_conf
, info
);
2124 if (err
&& err
!= -ENOMSG
) {
2125 retcode
= ERR_MANDATORY_TAG
;
2126 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2130 retcode
= check_net_options(tconn
, new_conf
);
2131 if (retcode
!= NO_ERROR
)
2134 retcode
= alloc_crypto(&crypto
, new_conf
);
2135 if (retcode
!= NO_ERROR
)
2138 ((char *)new_conf
->shared_secret
)[SHARED_SECRET_MAX
-1] = 0;
2140 conn_flush_workqueue(tconn
);
2142 mutex_lock(&tconn
->conf_update
);
2143 old_conf
= tconn
->net_conf
;
2145 retcode
= ERR_NET_CONFIGURED
;
2146 mutex_unlock(&tconn
->conf_update
);
2149 rcu_assign_pointer(tconn
->net_conf
, new_conf
);
2151 conn_free_crypto(tconn
);
2152 tconn
->cram_hmac_tfm
= crypto
.cram_hmac_tfm
;
2153 tconn
->integrity_tfm
= crypto
.integrity_tfm
;
2154 tconn
->csums_tfm
= crypto
.csums_tfm
;
2155 tconn
->verify_tfm
= crypto
.verify_tfm
;
2157 tconn
->my_addr_len
= nla_len(adm_ctx
.my_addr
);
2158 memcpy(&tconn
->my_addr
, nla_data(adm_ctx
.my_addr
), tconn
->my_addr_len
);
2159 tconn
->peer_addr_len
= nla_len(adm_ctx
.peer_addr
);
2160 memcpy(&tconn
->peer_addr
, nla_data(adm_ctx
.peer_addr
), tconn
->peer_addr_len
);
2162 mutex_unlock(&tconn
->conf_update
);
2165 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
2171 retcode
= conn_request_state(tconn
, NS(conn
, C_UNCONNECTED
), CS_VERBOSE
);
2173 conn_reconfig_done(tconn
);
2174 drbd_adm_finish(info
, retcode
);
2178 free_crypto(&crypto
);
2181 conn_reconfig_done(tconn
);
2183 drbd_adm_finish(info
, retcode
);
2187 static enum drbd_state_rv
conn_try_disconnect(struct drbd_tconn
*tconn
, bool force
)
2189 enum drbd_state_rv rv
;
2191 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
),
2192 force
? CS_HARD
: 0);
2195 case SS_NOTHING_TO_DO
:
2197 case SS_ALREADY_STANDALONE
:
2199 case SS_PRIMARY_NOP
:
2200 /* Our state checking code wants to see the peer outdated. */
2201 rv
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
2202 pdsk
, D_OUTDATED
), CS_VERBOSE
);
2204 case SS_CW_FAILED_BY_PEER
:
2205 /* The peer probably wants to see us outdated. */
2206 rv
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
2207 disk
, D_OUTDATED
), 0);
2208 if (rv
== SS_IS_DISKLESS
|| rv
== SS_LOWER_THAN_OUTDATED
) {
2209 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
),
2214 /* no special handling necessary */
2217 if (rv
>= SS_SUCCESS
) {
2218 enum drbd_state_rv rv2
;
2219 /* No one else can reconfigure the network while I am here.
2220 * The state handling only uses drbd_thread_stop_nowait(),
2221 * we want to really wait here until the receiver is no more.
2223 drbd_thread_stop(&adm_ctx
.tconn
->receiver
);
2225 /* Race breaker. This additional state change request may be
2226 * necessary, if this was a forced disconnect during a receiver
2227 * restart. We may have "killed" the receiver thread just
2228 * after drbdd_init() returned. Typically, we should be
2229 * C_STANDALONE already, now, and this becomes a no-op.
2231 rv2
= conn_request_state(tconn
, NS(conn
, C_STANDALONE
),
2232 CS_VERBOSE
| CS_HARD
);
2233 if (rv2
< SS_SUCCESS
)
2235 "unexpected rv2=%d in conn_try_disconnect()\n",
2241 int drbd_adm_disconnect(struct sk_buff
*skb
, struct genl_info
*info
)
2243 struct disconnect_parms parms
;
2244 struct drbd_tconn
*tconn
;
2245 enum drbd_state_rv rv
;
2246 enum drbd_ret_code retcode
;
2249 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONNECTION
);
2250 if (!adm_ctx
.reply_skb
)
2252 if (retcode
!= NO_ERROR
)
2255 tconn
= adm_ctx
.tconn
;
2256 memset(&parms
, 0, sizeof(parms
));
2257 if (info
->attrs
[DRBD_NLA_DISCONNECT_PARMS
]) {
2258 err
= disconnect_parms_from_attrs(&parms
, info
);
2260 retcode
= ERR_MANDATORY_TAG
;
2261 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2266 rv
= conn_try_disconnect(tconn
, parms
.force_disconnect
);
2267 if (rv
< SS_SUCCESS
)
2268 retcode
= rv
; /* FIXME: Type mismatch. */
2272 drbd_adm_finish(info
, retcode
);
2276 void resync_after_online_grow(struct drbd_conf
*mdev
)
2278 int iass
; /* I am sync source */
2280 dev_info(DEV
, "Resync of new storage after online grow\n");
2281 if (mdev
->state
.role
!= mdev
->state
.peer
)
2282 iass
= (mdev
->state
.role
== R_PRIMARY
);
2284 iass
= test_bit(RESOLVE_CONFLICTS
, &mdev
->tconn
->flags
);
2287 drbd_start_resync(mdev
, C_SYNC_SOURCE
);
2289 _drbd_request_state(mdev
, NS(conn
, C_WF_SYNC_UUID
), CS_VERBOSE
+ CS_SERIALIZE
);
2292 int drbd_adm_resize(struct sk_buff
*skb
, struct genl_info
*info
)
2294 struct disk_conf
*old_disk_conf
, *new_disk_conf
= NULL
;
2295 struct resize_parms rs
;
2296 struct drbd_conf
*mdev
;
2297 enum drbd_ret_code retcode
;
2298 enum determine_dev_size dd
;
2299 enum dds_flags ddsf
;
2303 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2304 if (!adm_ctx
.reply_skb
)
2306 if (retcode
!= NO_ERROR
)
2309 memset(&rs
, 0, sizeof(struct resize_parms
));
2310 if (info
->attrs
[DRBD_NLA_RESIZE_PARMS
]) {
2311 err
= resize_parms_from_attrs(&rs
, info
);
2313 retcode
= ERR_MANDATORY_TAG
;
2314 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2319 mdev
= adm_ctx
.mdev
;
2320 if (mdev
->state
.conn
> C_CONNECTED
) {
2321 retcode
= ERR_RESIZE_RESYNC
;
2325 if (mdev
->state
.role
== R_SECONDARY
&&
2326 mdev
->state
.peer
== R_SECONDARY
) {
2327 retcode
= ERR_NO_PRIMARY
;
2331 if (!get_ldev(mdev
)) {
2332 retcode
= ERR_NO_DISK
;
2336 if (rs
.no_resync
&& mdev
->tconn
->agreed_pro_version
< 93) {
2337 retcode
= ERR_NEED_APV_93
;
2342 u_size
= rcu_dereference(mdev
->ldev
->disk_conf
)->disk_size
;
2344 if (u_size
!= (sector_t
)rs
.resize_size
) {
2345 new_disk_conf
= kmalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
2346 if (!new_disk_conf
) {
2347 retcode
= ERR_NOMEM
;
2352 if (mdev
->ldev
->known_size
!= drbd_get_capacity(mdev
->ldev
->backing_bdev
))
2353 mdev
->ldev
->known_size
= drbd_get_capacity(mdev
->ldev
->backing_bdev
);
2355 if (new_disk_conf
) {
2356 mutex_lock(&mdev
->tconn
->conf_update
);
2357 old_disk_conf
= mdev
->ldev
->disk_conf
;
2358 *new_disk_conf
= *old_disk_conf
;
2359 new_disk_conf
->disk_size
= (sector_t
)rs
.resize_size
;
2360 rcu_assign_pointer(mdev
->ldev
->disk_conf
, new_disk_conf
);
2361 mutex_unlock(&mdev
->tconn
->conf_update
);
2363 kfree(old_disk_conf
);
2366 ddsf
= (rs
.resize_force
? DDSF_FORCED
: 0) | (rs
.no_resync
? DDSF_NO_RESYNC
: 0);
2367 dd
= drbd_determine_dev_size(mdev
, ddsf
);
2370 if (dd
== dev_size_error
) {
2371 retcode
= ERR_NOMEM_BITMAP
;
2375 if (mdev
->state
.conn
== C_CONNECTED
) {
2377 set_bit(RESIZE_PENDING
, &mdev
->flags
);
2379 drbd_send_uuids(mdev
);
2380 drbd_send_sizes(mdev
, 1, ddsf
);
2384 drbd_adm_finish(info
, retcode
);
2392 int drbd_adm_resource_opts(struct sk_buff
*skb
, struct genl_info
*info
)
2394 enum drbd_ret_code retcode
;
2395 struct drbd_tconn
*tconn
;
2396 struct res_opts res_opts
;
2399 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
2400 if (!adm_ctx
.reply_skb
)
2402 if (retcode
!= NO_ERROR
)
2404 tconn
= adm_ctx
.tconn
;
2406 res_opts
= tconn
->res_opts
;
2407 if (should_set_defaults(info
))
2408 set_res_opts_defaults(&res_opts
);
2410 err
= res_opts_from_attrs(&res_opts
, info
);
2411 if (err
&& err
!= -ENOMSG
) {
2412 retcode
= ERR_MANDATORY_TAG
;
2413 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2417 err
= set_resource_options(tconn
, &res_opts
);
2419 retcode
= ERR_INVALID_REQUEST
;
2421 retcode
= ERR_NOMEM
;
2425 drbd_adm_finish(info
, retcode
);
2429 int drbd_adm_invalidate(struct sk_buff
*skb
, struct genl_info
*info
)
2431 struct drbd_conf
*mdev
;
2432 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2434 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2435 if (!adm_ctx
.reply_skb
)
2437 if (retcode
!= NO_ERROR
)
2440 mdev
= adm_ctx
.mdev
;
2442 /* If there is still bitmap IO pending, probably because of a previous
2443 * resync just being finished, wait for it before requesting a new resync.
2444 * Also wait for it's after_state_ch(). */
2445 drbd_suspend_io(mdev
);
2446 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2447 drbd_flush_workqueue(mdev
);
2449 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
), CS_ORDERED
);
2451 /* If that did not work, try again,
2452 * but log failures this time (implicit CS_VERBOSE).
2454 * If we happen to be C_STANDALONE R_SECONDARY,
2455 * just change to D_INCONSISTENT, and set all bits in the bitmap.
2456 * Otherwise, we just fail, to avoid races with the resync handshake.
2458 if (retcode
< SS_SUCCESS
) {
2459 if (mdev
->state
.conn
== C_STANDALONE
&& mdev
->state
.role
== R_SECONDARY
) {
2460 retcode
= drbd_request_state(mdev
, NS(disk
, D_INCONSISTENT
));
2461 if (retcode
>= SS_SUCCESS
) {
2462 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
2463 "set_n_write from invalidate", BM_LOCKED_MASK
))
2464 retcode
= ERR_IO_MD_DISK
;
2467 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
2469 drbd_resume_io(mdev
);
2472 drbd_adm_finish(info
, retcode
);
2476 static int drbd_adm_simple_request_state(struct sk_buff
*skb
, struct genl_info
*info
,
2477 union drbd_state mask
, union drbd_state val
)
2479 enum drbd_ret_code retcode
;
2481 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2482 if (!adm_ctx
.reply_skb
)
2484 if (retcode
!= NO_ERROR
)
2487 retcode
= drbd_request_state(adm_ctx
.mdev
, mask
, val
);
2489 drbd_adm_finish(info
, retcode
);
2493 static int drbd_bmio_set_susp_al(struct drbd_conf
*mdev
)
2497 rv
= drbd_bmio_set_n_write(mdev
);
2498 drbd_suspend_al(mdev
);
2502 int drbd_adm_invalidate_peer(struct sk_buff
*skb
, struct genl_info
*info
)
2504 int retcode
; /* drbd_ret_code, drbd_state_rv */
2505 struct drbd_conf
*mdev
;
2507 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2508 if (!adm_ctx
.reply_skb
)
2510 if (retcode
!= NO_ERROR
)
2513 mdev
= adm_ctx
.mdev
;
2515 /* If there is still bitmap IO pending, probably because of a previous
2516 * resync just being finished, wait for it before requesting a new resync.
2517 * Also wait for it's after_state_ch(). */
2518 drbd_suspend_io(mdev
);
2519 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2520 drbd_flush_workqueue(mdev
);
2522 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
), CS_ORDERED
);
2523 if (retcode
< SS_SUCCESS
) {
2524 if (mdev
->state
.conn
== C_STANDALONE
&& mdev
->state
.role
== R_PRIMARY
) {
2525 /* The peer will get a resync upon connect anyways. Just make that
2526 into a full resync. */
2527 retcode
= drbd_request_state(mdev
, NS(pdsk
, D_INCONSISTENT
));
2528 if (retcode
>= SS_SUCCESS
) {
2529 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_susp_al
,
2530 "set_n_write from invalidate_peer",
2531 BM_LOCKED_SET_ALLOWED
))
2532 retcode
= ERR_IO_MD_DISK
;
2535 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
));
2537 drbd_resume_io(mdev
);
2540 drbd_adm_finish(info
, retcode
);
2544 int drbd_adm_pause_sync(struct sk_buff
*skb
, struct genl_info
*info
)
2546 enum drbd_ret_code retcode
;
2548 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2549 if (!adm_ctx
.reply_skb
)
2551 if (retcode
!= NO_ERROR
)
2554 if (drbd_request_state(adm_ctx
.mdev
, NS(user_isp
, 1)) == SS_NOTHING_TO_DO
)
2555 retcode
= ERR_PAUSE_IS_SET
;
2557 drbd_adm_finish(info
, retcode
);
2561 int drbd_adm_resume_sync(struct sk_buff
*skb
, struct genl_info
*info
)
2563 union drbd_dev_state s
;
2564 enum drbd_ret_code retcode
;
2566 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2567 if (!adm_ctx
.reply_skb
)
2569 if (retcode
!= NO_ERROR
)
2572 if (drbd_request_state(adm_ctx
.mdev
, NS(user_isp
, 0)) == SS_NOTHING_TO_DO
) {
2573 s
= adm_ctx
.mdev
->state
;
2574 if (s
.conn
== C_PAUSED_SYNC_S
|| s
.conn
== C_PAUSED_SYNC_T
) {
2575 retcode
= s
.aftr_isp
? ERR_PIC_AFTER_DEP
:
2576 s
.peer_isp
? ERR_PIC_PEER_DEP
: ERR_PAUSE_IS_CLEAR
;
2578 retcode
= ERR_PAUSE_IS_CLEAR
;
2583 drbd_adm_finish(info
, retcode
);
2587 int drbd_adm_suspend_io(struct sk_buff
*skb
, struct genl_info
*info
)
2589 return drbd_adm_simple_request_state(skb
, info
, NS(susp
, 1));
2592 int drbd_adm_resume_io(struct sk_buff
*skb
, struct genl_info
*info
)
2594 struct drbd_conf
*mdev
;
2595 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2597 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2598 if (!adm_ctx
.reply_skb
)
2600 if (retcode
!= NO_ERROR
)
2603 mdev
= adm_ctx
.mdev
;
2604 if (test_bit(NEW_CUR_UUID
, &mdev
->flags
)) {
2605 drbd_uuid_new_current(mdev
);
2606 clear_bit(NEW_CUR_UUID
, &mdev
->flags
);
2608 drbd_suspend_io(mdev
);
2609 retcode
= drbd_request_state(mdev
, NS3(susp
, 0, susp_nod
, 0, susp_fen
, 0));
2610 if (retcode
== SS_SUCCESS
) {
2611 if (mdev
->state
.conn
< C_CONNECTED
)
2612 tl_clear(mdev
->tconn
);
2613 if (mdev
->state
.disk
== D_DISKLESS
|| mdev
->state
.disk
== D_FAILED
)
2614 tl_restart(mdev
->tconn
, FAIL_FROZEN_DISK_IO
);
2616 drbd_resume_io(mdev
);
2619 drbd_adm_finish(info
, retcode
);
2623 int drbd_adm_outdate(struct sk_buff
*skb
, struct genl_info
*info
)
2625 return drbd_adm_simple_request_state(skb
, info
, NS(disk
, D_OUTDATED
));
2628 int nla_put_drbd_cfg_context(struct sk_buff
*skb
, struct drbd_tconn
*tconn
, unsigned vnr
)
2631 nla
= nla_nest_start(skb
, DRBD_NLA_CFG_CONTEXT
);
2633 goto nla_put_failure
;
2634 if (vnr
!= VOLUME_UNSPECIFIED
&&
2635 nla_put_u32(skb
, T_ctx_volume
, vnr
))
2636 goto nla_put_failure
;
2637 if (nla_put_string(skb
, T_ctx_resource_name
, tconn
->name
))
2638 goto nla_put_failure
;
2639 if (tconn
->my_addr_len
&&
2640 nla_put(skb
, T_ctx_my_addr
, tconn
->my_addr_len
, &tconn
->my_addr
))
2641 goto nla_put_failure
;
2642 if (tconn
->peer_addr_len
&&
2643 nla_put(skb
, T_ctx_peer_addr
, tconn
->peer_addr_len
, &tconn
->peer_addr
))
2644 goto nla_put_failure
;
2645 nla_nest_end(skb
, nla
);
2650 nla_nest_cancel(skb
, nla
);
2654 int nla_put_status_info(struct sk_buff
*skb
, struct drbd_conf
*mdev
,
2655 const struct sib_info
*sib
)
2657 struct state_info
*si
= NULL
; /* for sizeof(si->member); */
2658 struct net_conf
*nc
;
2662 int exclude_sensitive
;
2664 /* If sib != NULL, this is drbd_bcast_event, which anyone can listen
2665 * to. So we better exclude_sensitive information.
2667 * If sib == NULL, this is drbd_adm_get_status, executed synchronously
2668 * in the context of the requesting user process. Exclude sensitive
2669 * information, unless current has superuser.
2671 * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and
2672 * relies on the current implementation of netlink_dump(), which
2673 * executes the dump callback successively from netlink_recvmsg(),
2674 * always in the context of the receiving process */
2675 exclude_sensitive
= sib
|| !capable(CAP_SYS_ADMIN
);
2677 got_ldev
= get_ldev(mdev
);
2679 /* We need to add connection name and volume number information still.
2680 * Minor number is in drbd_genlmsghdr. */
2681 if (nla_put_drbd_cfg_context(skb
, mdev
->tconn
, mdev
->vnr
))
2682 goto nla_put_failure
;
2684 if (res_opts_to_skb(skb
, &mdev
->tconn
->res_opts
, exclude_sensitive
))
2685 goto nla_put_failure
;
2689 if (disk_conf_to_skb(skb
, rcu_dereference(mdev
->ldev
->disk_conf
), exclude_sensitive
))
2690 goto nla_put_failure
;
2692 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
2694 err
= net_conf_to_skb(skb
, nc
, exclude_sensitive
);
2697 goto nla_put_failure
;
2699 nla
= nla_nest_start(skb
, DRBD_NLA_STATE_INFO
);
2701 goto nla_put_failure
;
2702 if (nla_put_u32(skb
, T_sib_reason
, sib
? sib
->sib_reason
: SIB_GET_STATUS_REPLY
) ||
2703 nla_put_u32(skb
, T_current_state
, mdev
->state
.i
) ||
2704 nla_put_u64(skb
, T_ed_uuid
, mdev
->ed_uuid
) ||
2705 nla_put_u64(skb
, T_capacity
, drbd_get_capacity(mdev
->this_bdev
)) ||
2706 nla_put_u64(skb
, T_send_cnt
, mdev
->send_cnt
) ||
2707 nla_put_u64(skb
, T_recv_cnt
, mdev
->recv_cnt
) ||
2708 nla_put_u64(skb
, T_read_cnt
, mdev
->read_cnt
) ||
2709 nla_put_u64(skb
, T_writ_cnt
, mdev
->writ_cnt
) ||
2710 nla_put_u64(skb
, T_al_writ_cnt
, mdev
->al_writ_cnt
) ||
2711 nla_put_u64(skb
, T_bm_writ_cnt
, mdev
->bm_writ_cnt
) ||
2712 nla_put_u32(skb
, T_ap_bio_cnt
, atomic_read(&mdev
->ap_bio_cnt
)) ||
2713 nla_put_u32(skb
, T_ap_pending_cnt
, atomic_read(&mdev
->ap_pending_cnt
)) ||
2714 nla_put_u32(skb
, T_rs_pending_cnt
, atomic_read(&mdev
->rs_pending_cnt
)))
2715 goto nla_put_failure
;
2720 spin_lock_irq(&mdev
->ldev
->md
.uuid_lock
);
2721 err
= nla_put(skb
, T_uuids
, sizeof(si
->uuids
), mdev
->ldev
->md
.uuid
);
2722 spin_unlock_irq(&mdev
->ldev
->md
.uuid_lock
);
2725 goto nla_put_failure
;
2727 if (nla_put_u32(skb
, T_disk_flags
, mdev
->ldev
->md
.flags
) ||
2728 nla_put_u64(skb
, T_bits_total
, drbd_bm_bits(mdev
)) ||
2729 nla_put_u64(skb
, T_bits_oos
, drbd_bm_total_weight(mdev
)))
2730 goto nla_put_failure
;
2731 if (C_SYNC_SOURCE
<= mdev
->state
.conn
&&
2732 C_PAUSED_SYNC_T
>= mdev
->state
.conn
) {
2733 if (nla_put_u64(skb
, T_bits_rs_total
, mdev
->rs_total
) ||
2734 nla_put_u64(skb
, T_bits_rs_failed
, mdev
->rs_failed
))
2735 goto nla_put_failure
;
2740 switch(sib
->sib_reason
) {
2741 case SIB_SYNC_PROGRESS
:
2742 case SIB_GET_STATUS_REPLY
:
2744 case SIB_STATE_CHANGE
:
2745 if (nla_put_u32(skb
, T_prev_state
, sib
->os
.i
) ||
2746 nla_put_u32(skb
, T_new_state
, sib
->ns
.i
))
2747 goto nla_put_failure
;
2749 case SIB_HELPER_POST
:
2750 if (nla_put_u32(skb
, T_helper_exit_code
,
2751 sib
->helper_exit_code
))
2752 goto nla_put_failure
;
2754 case SIB_HELPER_PRE
:
2755 if (nla_put_string(skb
, T_helper
, sib
->helper_name
))
2756 goto nla_put_failure
;
2760 nla_nest_end(skb
, nla
);
2770 int drbd_adm_get_status(struct sk_buff
*skb
, struct genl_info
*info
)
2772 enum drbd_ret_code retcode
;
2775 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2776 if (!adm_ctx
.reply_skb
)
2778 if (retcode
!= NO_ERROR
)
2781 err
= nla_put_status_info(adm_ctx
.reply_skb
, adm_ctx
.mdev
, NULL
);
2783 nlmsg_free(adm_ctx
.reply_skb
);
2787 drbd_adm_finish(info
, retcode
);
2791 int get_one_status(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2793 struct drbd_conf
*mdev
;
2794 struct drbd_genlmsghdr
*dh
;
2795 struct drbd_tconn
*pos
= (struct drbd_tconn
*)cb
->args
[0];
2796 struct drbd_tconn
*tconn
= NULL
;
2797 struct drbd_tconn
*tmp
;
2798 unsigned volume
= cb
->args
[1];
2800 /* Open coded, deferred, iteration:
2801 * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) {
2802 * idr_for_each_entry(&tconn->volumes, mdev, i) {
2806 * where tconn is cb->args[0];
2807 * and i is cb->args[1];
2809 * cb->args[2] indicates if we shall loop over all resources,
2810 * or just dump all volumes of a single resource.
2812 * This may miss entries inserted after this dump started,
2813 * or entries deleted before they are reached.
2815 * We need to make sure the mdev won't disappear while
2816 * we are looking at it, and revalidate our iterators
2817 * on each iteration.
2820 /* synchronize with conn_create()/conn_destroy() */
2822 /* revalidate iterator position */
2823 list_for_each_entry_rcu(tmp
, &drbd_tconns
, all_tconn
) {
2825 /* first iteration */
2837 mdev
= idr_get_next(&tconn
->volumes
, &volume
);
2839 /* No more volumes to dump on this tconn.
2840 * Advance tconn iterator. */
2841 pos
= list_entry_rcu(tconn
->all_tconn
.next
,
2842 struct drbd_tconn
, all_tconn
);
2843 /* Did we dump any volume on this tconn yet? */
2845 /* If we reached the end of the list,
2846 * or only a single resource dump was requested,
2848 if (&pos
->all_tconn
== &drbd_tconns
|| cb
->args
[2])
2856 dh
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
,
2857 cb
->nlh
->nlmsg_seq
, &drbd_genl_family
,
2858 NLM_F_MULTI
, DRBD_ADM_GET_STATUS
);
2863 /* This is a tconn without a single volume.
2864 * Suprisingly enough, it may have a network
2866 struct net_conf
*nc
;
2868 dh
->ret_code
= NO_ERROR
;
2869 if (nla_put_drbd_cfg_context(skb
, tconn
, VOLUME_UNSPECIFIED
))
2871 nc
= rcu_dereference(tconn
->net_conf
);
2872 if (nc
&& net_conf_to_skb(skb
, nc
, 1) != 0)
2877 D_ASSERT(mdev
->vnr
== volume
);
2878 D_ASSERT(mdev
->tconn
== tconn
);
2880 dh
->minor
= mdev_to_minor(mdev
);
2881 dh
->ret_code
= NO_ERROR
;
2883 if (nla_put_status_info(skb
, mdev
, NULL
)) {
2885 genlmsg_cancel(skb
, dh
);
2889 genlmsg_end(skb
, dh
);
2894 /* where to start the next iteration */
2895 cb
->args
[0] = (long)pos
;
2896 cb
->args
[1] = (pos
== tconn
) ? volume
+ 1 : 0;
2898 /* No more tconns/volumes/minors found results in an empty skb.
2899 * Which will terminate the dump. */
2904 * Request status of all resources, or of all volumes within a single resource.
2906 * This is a dump, as the answer may not fit in a single reply skb otherwise.
2907 * Which means we cannot use the family->attrbuf or other such members, because
2908 * dump is NOT protected by the genl_lock(). During dump, we only have access
2909 * to the incoming skb, and need to opencode "parsing" of the nlattr payload.
2911 * Once things are setup properly, we call into get_one_status().
2913 int drbd_adm_get_status_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2915 const unsigned hdrlen
= GENL_HDRLEN
+ GENL_MAGIC_FAMILY_HDRSZ
;
2917 const char *resource_name
;
2918 struct drbd_tconn
*tconn
;
2921 /* Is this a followup call? */
2923 /* ... of a single resource dump,
2924 * and the resource iterator has been advanced already? */
2925 if (cb
->args
[2] && cb
->args
[2] != cb
->args
[0])
2926 return 0; /* DONE. */
2930 /* First call (from netlink_dump_start). We need to figure out
2931 * which resource(s) the user wants us to dump. */
2932 nla
= nla_find(nlmsg_attrdata(cb
->nlh
, hdrlen
),
2933 nlmsg_attrlen(cb
->nlh
, hdrlen
),
2934 DRBD_NLA_CFG_CONTEXT
);
2936 /* No explicit context given. Dump all. */
2939 maxtype
= ARRAY_SIZE(drbd_cfg_context_nl_policy
) - 1;
2940 nla
= drbd_nla_find_nested(maxtype
, nla
, __nla_type(T_ctx_resource_name
));
2942 return PTR_ERR(nla
);
2943 /* context given, but no name present? */
2946 resource_name
= nla_data(nla
);
2947 tconn
= conn_get_by_name(resource_name
);
2952 kref_put(&tconn
->kref
, &conn_destroy
); /* get_one_status() (re)validates tconn by itself */
2954 /* prime iterators, and set "filter" mode mark:
2955 * only dump this tconn. */
2956 cb
->args
[0] = (long)tconn
;
2957 /* cb->args[1] = 0; passed in this way. */
2958 cb
->args
[2] = (long)tconn
;
2961 return get_one_status(skb
, cb
);
2964 int drbd_adm_get_timeout_type(struct sk_buff
*skb
, struct genl_info
*info
)
2966 enum drbd_ret_code retcode
;
2967 struct timeout_parms tp
;
2970 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2971 if (!adm_ctx
.reply_skb
)
2973 if (retcode
!= NO_ERROR
)
2977 adm_ctx
.mdev
->state
.pdsk
== D_OUTDATED
? UT_PEER_OUTDATED
:
2978 test_bit(USE_DEGR_WFC_T
, &adm_ctx
.mdev
->flags
) ? UT_DEGRADED
:
2981 err
= timeout_parms_to_priv_skb(adm_ctx
.reply_skb
, &tp
);
2983 nlmsg_free(adm_ctx
.reply_skb
);
2987 drbd_adm_finish(info
, retcode
);
2991 int drbd_adm_start_ov(struct sk_buff
*skb
, struct genl_info
*info
)
2993 struct drbd_conf
*mdev
;
2994 enum drbd_ret_code retcode
;
2995 struct start_ov_parms parms
;
2997 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2998 if (!adm_ctx
.reply_skb
)
3000 if (retcode
!= NO_ERROR
)
3003 mdev
= adm_ctx
.mdev
;
3005 /* resume from last known position, if possible */
3006 parms
.ov_start_sector
= mdev
->ov_start_sector
;
3007 parms
.ov_stop_sector
= ULLONG_MAX
;
3008 if (info
->attrs
[DRBD_NLA_START_OV_PARMS
]) {
3009 int err
= start_ov_parms_from_attrs(&parms
, info
);
3011 retcode
= ERR_MANDATORY_TAG
;
3012 drbd_msg_put_info(from_attrs_err_to_txt(err
));
3016 /* w_make_ov_request expects position to be aligned */
3017 mdev
->ov_start_sector
= parms
.ov_start_sector
& ~(BM_SECT_PER_BIT
-1);
3018 mdev
->ov_stop_sector
= parms
.ov_stop_sector
;
3020 /* If there is still bitmap IO pending, e.g. previous resync or verify
3021 * just being finished, wait for it before requesting a new resync. */
3022 drbd_suspend_io(mdev
);
3023 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
3024 retcode
= drbd_request_state(mdev
,NS(conn
,C_VERIFY_S
));
3025 drbd_resume_io(mdev
);
3027 drbd_adm_finish(info
, retcode
);
3032 int drbd_adm_new_c_uuid(struct sk_buff
*skb
, struct genl_info
*info
)
3034 struct drbd_conf
*mdev
;
3035 enum drbd_ret_code retcode
;
3036 int skip_initial_sync
= 0;
3038 struct new_c_uuid_parms args
;
3040 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
3041 if (!adm_ctx
.reply_skb
)
3043 if (retcode
!= NO_ERROR
)
3046 mdev
= adm_ctx
.mdev
;
3047 memset(&args
, 0, sizeof(args
));
3048 if (info
->attrs
[DRBD_NLA_NEW_C_UUID_PARMS
]) {
3049 err
= new_c_uuid_parms_from_attrs(&args
, info
);
3051 retcode
= ERR_MANDATORY_TAG
;
3052 drbd_msg_put_info(from_attrs_err_to_txt(err
));
3057 mutex_lock(mdev
->state_mutex
); /* Protects us against serialized state changes. */
3059 if (!get_ldev(mdev
)) {
3060 retcode
= ERR_NO_DISK
;
3064 /* this is "skip initial sync", assume to be clean */
3065 if (mdev
->state
.conn
== C_CONNECTED
&& mdev
->tconn
->agreed_pro_version
>= 90 &&
3066 mdev
->ldev
->md
.uuid
[UI_CURRENT
] == UUID_JUST_CREATED
&& args
.clear_bm
) {
3067 dev_info(DEV
, "Preparing to skip initial sync\n");
3068 skip_initial_sync
= 1;
3069 } else if (mdev
->state
.conn
!= C_STANDALONE
) {
3070 retcode
= ERR_CONNECTED
;
3074 drbd_uuid_set(mdev
, UI_BITMAP
, 0); /* Rotate UI_BITMAP to History 1, etc... */
3075 drbd_uuid_new_current(mdev
); /* New current, previous to UI_BITMAP */
3077 if (args
.clear_bm
) {
3078 err
= drbd_bitmap_io(mdev
, &drbd_bmio_clear_n_write
,
3079 "clear_n_write from new_c_uuid", BM_LOCKED_MASK
);
3081 dev_err(DEV
, "Writing bitmap failed with %d\n",err
);
3082 retcode
= ERR_IO_MD_DISK
;
3084 if (skip_initial_sync
) {
3085 drbd_send_uuids_skip_initial_sync(mdev
);
3086 _drbd_uuid_set(mdev
, UI_BITMAP
, 0);
3087 drbd_print_uuids(mdev
, "cleared bitmap UUID");
3088 spin_lock_irq(&mdev
->tconn
->req_lock
);
3089 _drbd_set_state(_NS2(mdev
, disk
, D_UP_TO_DATE
, pdsk
, D_UP_TO_DATE
),
3091 spin_unlock_irq(&mdev
->tconn
->req_lock
);
3099 mutex_unlock(mdev
->state_mutex
);
3101 drbd_adm_finish(info
, retcode
);
3105 static enum drbd_ret_code
3106 drbd_check_resource_name(const char *name
)
3108 if (!name
|| !name
[0]) {
3109 drbd_msg_put_info("resource name missing");
3110 return ERR_MANDATORY_TAG
;
3112 /* if we want to use these in sysfs/configfs/debugfs some day,
3113 * we must not allow slashes */
3114 if (strchr(name
, '/')) {
3115 drbd_msg_put_info("invalid resource name");
3116 return ERR_INVALID_REQUEST
;
3121 int drbd_adm_new_resource(struct sk_buff
*skb
, struct genl_info
*info
)
3123 enum drbd_ret_code retcode
;
3124 struct res_opts res_opts
;
3127 retcode
= drbd_adm_prepare(skb
, info
, 0);
3128 if (!adm_ctx
.reply_skb
)
3130 if (retcode
!= NO_ERROR
)
3133 set_res_opts_defaults(&res_opts
);
3134 err
= res_opts_from_attrs(&res_opts
, info
);
3135 if (err
&& err
!= -ENOMSG
) {
3136 retcode
= ERR_MANDATORY_TAG
;
3137 drbd_msg_put_info(from_attrs_err_to_txt(err
));
3141 retcode
= drbd_check_resource_name(adm_ctx
.resource_name
);
3142 if (retcode
!= NO_ERROR
)
3145 if (adm_ctx
.tconn
) {
3146 if (info
->nlhdr
->nlmsg_flags
& NLM_F_EXCL
) {
3147 retcode
= ERR_INVALID_REQUEST
;
3148 drbd_msg_put_info("resource exists");
3150 /* else: still NO_ERROR */
3154 if (!conn_create(adm_ctx
.resource_name
, &res_opts
))
3155 retcode
= ERR_NOMEM
;
3157 drbd_adm_finish(info
, retcode
);
3161 int drbd_adm_add_minor(struct sk_buff
*skb
, struct genl_info
*info
)
3163 struct drbd_genlmsghdr
*dh
= info
->userhdr
;
3164 enum drbd_ret_code retcode
;
3166 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
3167 if (!adm_ctx
.reply_skb
)
3169 if (retcode
!= NO_ERROR
)
3172 if (dh
->minor
> MINORMASK
) {
3173 drbd_msg_put_info("requested minor out of range");
3174 retcode
= ERR_INVALID_REQUEST
;
3177 if (adm_ctx
.volume
> DRBD_VOLUME_MAX
) {
3178 drbd_msg_put_info("requested volume id out of range");
3179 retcode
= ERR_INVALID_REQUEST
;
3183 /* drbd_adm_prepare made sure already
3184 * that mdev->tconn and mdev->vnr match the request. */
3186 if (info
->nlhdr
->nlmsg_flags
& NLM_F_EXCL
)
3187 retcode
= ERR_MINOR_EXISTS
;
3188 /* else: still NO_ERROR */
3192 retcode
= conn_new_minor(adm_ctx
.tconn
, dh
->minor
, adm_ctx
.volume
);
3194 drbd_adm_finish(info
, retcode
);
3198 static enum drbd_ret_code
adm_delete_minor(struct drbd_conf
*mdev
)
3200 if (mdev
->state
.disk
== D_DISKLESS
&&
3201 /* no need to be mdev->state.conn == C_STANDALONE &&
3202 * we may want to delete a minor from a live replication group.
3204 mdev
->state
.role
== R_SECONDARY
) {
3205 _drbd_request_state(mdev
, NS(conn
, C_WF_REPORT_PARAMS
),
3206 CS_VERBOSE
+ CS_WAIT_COMPLETE
);
3207 idr_remove(&mdev
->tconn
->volumes
, mdev
->vnr
);
3208 idr_remove(&minors
, mdev_to_minor(mdev
));
3209 destroy_workqueue(mdev
->submit
.wq
);
3210 del_gendisk(mdev
->vdisk
);
3212 kref_put(&mdev
->kref
, &drbd_minor_destroy
);
3215 return ERR_MINOR_CONFIGURED
;
3218 int drbd_adm_delete_minor(struct sk_buff
*skb
, struct genl_info
*info
)
3220 enum drbd_ret_code retcode
;
3222 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
3223 if (!adm_ctx
.reply_skb
)
3225 if (retcode
!= NO_ERROR
)
3228 retcode
= adm_delete_minor(adm_ctx
.mdev
);
3230 drbd_adm_finish(info
, retcode
);
3234 int drbd_adm_down(struct sk_buff
*skb
, struct genl_info
*info
)
3236 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
3237 struct drbd_conf
*mdev
;
3240 retcode
= drbd_adm_prepare(skb
, info
, 0);
3241 if (!adm_ctx
.reply_skb
)
3243 if (retcode
!= NO_ERROR
)
3246 if (!adm_ctx
.tconn
) {
3247 retcode
= ERR_RES_NOT_KNOWN
;
3252 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3253 retcode
= drbd_set_role(mdev
, R_SECONDARY
, 0);
3254 if (retcode
< SS_SUCCESS
) {
3255 drbd_msg_put_info("failed to demote");
3260 retcode
= conn_try_disconnect(adm_ctx
.tconn
, 0);
3261 if (retcode
< SS_SUCCESS
) {
3262 drbd_msg_put_info("failed to disconnect");
3267 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3268 retcode
= adm_detach(mdev
, 0);
3269 if (retcode
< SS_SUCCESS
|| retcode
> NO_ERROR
) {
3270 drbd_msg_put_info("failed to detach");
3275 /* If we reach this, all volumes (of this tconn) are Secondary,
3276 * Disconnected, Diskless, aka Unconfigured. Make sure all threads have
3277 * actually stopped, state handling only does drbd_thread_stop_nowait(). */
3278 drbd_thread_stop(&adm_ctx
.tconn
->worker
);
3280 /* Now, nothing can fail anymore */
3282 /* delete volumes */
3283 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3284 retcode
= adm_delete_minor(mdev
);
3285 if (retcode
!= NO_ERROR
) {
3286 /* "can not happen" */
3287 drbd_msg_put_info("failed to delete volume");
3292 /* delete connection */
3293 if (conn_lowest_minor(adm_ctx
.tconn
) < 0) {
3294 list_del_rcu(&adm_ctx
.tconn
->all_tconn
);
3296 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
3300 /* "can not happen" */
3301 retcode
= ERR_RES_IN_USE
;
3302 drbd_msg_put_info("failed to delete connection");
3306 drbd_adm_finish(info
, retcode
);
3310 int drbd_adm_del_resource(struct sk_buff
*skb
, struct genl_info
*info
)
3312 enum drbd_ret_code retcode
;
3314 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_RESOURCE
);
3315 if (!adm_ctx
.reply_skb
)
3317 if (retcode
!= NO_ERROR
)
3320 if (conn_lowest_minor(adm_ctx
.tconn
) < 0) {
3321 list_del_rcu(&adm_ctx
.tconn
->all_tconn
);
3323 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
3327 retcode
= ERR_RES_IN_USE
;
3330 if (retcode
== NO_ERROR
)
3331 drbd_thread_stop(&adm_ctx
.tconn
->worker
);
3333 drbd_adm_finish(info
, retcode
);
3337 void drbd_bcast_event(struct drbd_conf
*mdev
, const struct sib_info
*sib
)
3339 static atomic_t drbd_genl_seq
= ATOMIC_INIT(2); /* two. */
3340 struct sk_buff
*msg
;
3341 struct drbd_genlmsghdr
*d_out
;
3345 if (sib
->sib_reason
== SIB_SYNC_PROGRESS
) {
3346 if (time_after(jiffies
, mdev
->rs_last_bcast
+ HZ
))
3347 mdev
->rs_last_bcast
= jiffies
;
3352 seq
= atomic_inc_return(&drbd_genl_seq
);
3353 msg
= genlmsg_new(NLMSG_GOODSIZE
, GFP_NOIO
);
3358 d_out
= genlmsg_put(msg
, 0, seq
, &drbd_genl_family
, 0, DRBD_EVENT
);
3359 if (!d_out
) /* cannot happen, but anyways. */
3360 goto nla_put_failure
;
3361 d_out
->minor
= mdev_to_minor(mdev
);
3362 d_out
->ret_code
= NO_ERROR
;
3364 if (nla_put_status_info(msg
, mdev
, sib
))
3365 goto nla_put_failure
;
3366 genlmsg_end(msg
, d_out
);
3367 err
= drbd_genl_multicast_events(msg
, 0);
3368 /* msg has been consumed or freed in netlink_broadcast() */
3369 if (err
&& err
!= -ESRCH
)
3377 dev_err(DEV
, "Error %d while broadcasting event. "
3378 "Event seq:%u sib_reason:%u\n",
3379 err
, seq
, sib
->sib_reason
);