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_create_connection(struct sk_buff
*skb
, struct genl_info
*info
);
51 int drbd_adm_delete_connection(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>
78 #include <linux/genl_magic_func.h>
80 /* used blkdev_get_by_path, to claim our meta data device(s) */
81 static char *drbd_m_holder
= "Hands off! this is DRBD's meta data device.";
83 /* Configuration is strictly serialized, because generic netlink message
84 * processing is strictly serialized by the genl_lock().
85 * Which means we can use one static global drbd_config_context struct.
87 static struct drbd_config_context
{
88 /* assigned from drbd_genlmsghdr */
90 /* assigned from request attributes, if present */
92 #define VOLUME_UNSPECIFIED (-1U)
93 /* pointer into the request skb,
94 * limited lifetime! */
98 struct sk_buff
*reply_skb
;
99 /* pointer into reply buffer */
100 struct drbd_genlmsghdr
*reply_dh
;
101 /* resolved from attributes, if possible */
102 struct drbd_conf
*mdev
;
103 struct drbd_tconn
*tconn
;
106 static void drbd_adm_send_reply(struct sk_buff
*skb
, struct genl_info
*info
)
108 genlmsg_end(skb
, genlmsg_data(nlmsg_data(nlmsg_hdr(skb
))));
109 if (genlmsg_reply(skb
, info
))
110 printk(KERN_ERR
"drbd: error sending genl reply\n");
113 /* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only
114 * reason it could fail was no space in skb, and there are 4k available. */
115 int drbd_msg_put_info(const char *info
)
117 struct sk_buff
*skb
= adm_ctx
.reply_skb
;
121 if (!info
|| !info
[0])
124 nla
= nla_nest_start(skb
, DRBD_NLA_CFG_REPLY
);
128 err
= nla_put_string(skb
, T_info_text
, info
);
130 nla_nest_cancel(skb
, nla
);
133 nla_nest_end(skb
, nla
);
137 /* This would be a good candidate for a "pre_doit" hook,
138 * and per-family private info->pointers.
139 * But we need to stay compatible with older kernels.
140 * If it returns successfully, adm_ctx members are valid.
142 #define DRBD_ADM_NEED_MINOR 1
143 #define DRBD_ADM_NEED_CONN 2
144 static int drbd_adm_prepare(struct sk_buff
*skb
, struct genl_info
*info
,
147 struct drbd_genlmsghdr
*d_in
= info
->userhdr
;
148 const u8 cmd
= info
->genlhdr
->cmd
;
151 memset(&adm_ctx
, 0, sizeof(adm_ctx
));
153 /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */
154 if (cmd
!= DRBD_ADM_GET_STATUS
155 && security_netlink_recv(skb
, CAP_SYS_ADMIN
))
158 adm_ctx
.reply_skb
= genlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
159 if (!adm_ctx
.reply_skb
)
162 adm_ctx
.reply_dh
= genlmsg_put_reply(adm_ctx
.reply_skb
,
163 info
, &drbd_genl_family
, 0, cmd
);
164 /* put of a few bytes into a fresh skb of >= 4k will always succeed.
166 if (!adm_ctx
.reply_dh
)
169 adm_ctx
.reply_dh
->minor
= d_in
->minor
;
170 adm_ctx
.reply_dh
->ret_code
= NO_ERROR
;
172 if (info
->attrs
[DRBD_NLA_CFG_CONTEXT
]) {
174 /* parse and validate only */
175 err
= drbd_cfg_context_from_attrs(NULL
, info
);
179 /* It was present, and valid,
180 * copy it over to the reply skb. */
181 err
= nla_put_nohdr(adm_ctx
.reply_skb
,
182 info
->attrs
[DRBD_NLA_CFG_CONTEXT
]->nla_len
,
183 info
->attrs
[DRBD_NLA_CFG_CONTEXT
]);
187 /* and assign stuff to the global adm_ctx */
188 nla
= nested_attr_tb
[__nla_type(T_ctx_volume
)];
189 adm_ctx
.volume
= nla
? nla_get_u32(nla
) : VOLUME_UNSPECIFIED
;
190 nla
= nested_attr_tb
[__nla_type(T_ctx_conn_name
)];
192 adm_ctx
.conn_name
= nla_data(nla
);
194 adm_ctx
.volume
= VOLUME_UNSPECIFIED
;
196 adm_ctx
.minor
= d_in
->minor
;
197 adm_ctx
.mdev
= minor_to_mdev(d_in
->minor
);
198 adm_ctx
.tconn
= conn_get_by_name(adm_ctx
.conn_name
);
200 if (!adm_ctx
.mdev
&& (flags
& DRBD_ADM_NEED_MINOR
)) {
201 drbd_msg_put_info("unknown minor");
202 return ERR_MINOR_INVALID
;
204 if (!adm_ctx
.tconn
&& (flags
& DRBD_ADM_NEED_CONN
)) {
205 drbd_msg_put_info("unknown connection");
206 return ERR_INVALID_REQUEST
;
209 /* some more paranoia, if the request was over-determined */
210 if (adm_ctx
.mdev
&& adm_ctx
.tconn
&&
211 adm_ctx
.mdev
->tconn
!= adm_ctx
.tconn
) {
212 pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n",
213 adm_ctx
.minor
, adm_ctx
.conn_name
, adm_ctx
.mdev
->tconn
->name
);
214 drbd_msg_put_info("minor exists in different connection");
215 return ERR_INVALID_REQUEST
;
218 adm_ctx
.volume
!= VOLUME_UNSPECIFIED
&&
219 adm_ctx
.volume
!= adm_ctx
.mdev
->vnr
) {
220 pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n",
221 adm_ctx
.minor
, adm_ctx
.volume
,
222 adm_ctx
.mdev
->vnr
, adm_ctx
.mdev
->tconn
->name
);
223 drbd_msg_put_info("minor exists as different volume");
224 return ERR_INVALID_REQUEST
;
230 nlmsg_free(adm_ctx
.reply_skb
);
231 adm_ctx
.reply_skb
= NULL
;
235 static int drbd_adm_finish(struct genl_info
*info
, int retcode
)
238 const char *conn_name
= NULL
;
241 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
242 adm_ctx
.tconn
= NULL
;
245 if (!adm_ctx
.reply_skb
)
248 adm_ctx
.reply_dh
->ret_code
= retcode
;
250 nla
= info
->attrs
[DRBD_NLA_CFG_CONTEXT
];
252 nla
= nla_find_nested(nla
, __nla_type(T_ctx_conn_name
));
254 conn_name
= nla_data(nla
);
257 drbd_adm_send_reply(adm_ctx
.reply_skb
, info
);
261 static void setup_khelper_env(struct drbd_tconn
*tconn
, char **envp
)
267 nc
= rcu_dereference(tconn
->net_conf
);
269 switch (((struct sockaddr
*)nc
->peer_addr
)->sa_family
) {
272 snprintf(envp
[4], 60, "DRBD_PEER_ADDRESS=%pI6",
273 &((struct sockaddr_in6
*)nc
->peer_addr
)->sin6_addr
);
277 snprintf(envp
[4], 60, "DRBD_PEER_ADDRESS=%pI4",
278 &((struct sockaddr_in
*)nc
->peer_addr
)->sin_addr
);
282 snprintf(envp
[4], 60, "DRBD_PEER_ADDRESS=%pI4",
283 &((struct sockaddr_in
*)nc
->peer_addr
)->sin_addr
);
285 snprintf(envp
[3], 20, "DRBD_PEER_AF=%s", afs
);
290 int drbd_khelper(struct drbd_conf
*mdev
, char *cmd
)
292 char *envp
[] = { "HOME=/",
294 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
295 (char[20]) { }, /* address family */
296 (char[60]) { }, /* address */
299 char *argv
[] = {usermode_helper
, cmd
, mb
, NULL
};
303 snprintf(mb
, 12, "minor-%d", mdev_to_minor(mdev
));
304 setup_khelper_env(mdev
->tconn
, envp
);
306 /* The helper may take some time.
307 * write out any unsynced meta data changes now */
310 dev_info(DEV
, "helper command: %s %s %s\n", usermode_helper
, cmd
, mb
);
311 sib
.sib_reason
= SIB_HELPER_PRE
;
312 sib
.helper_name
= cmd
;
313 drbd_bcast_event(mdev
, &sib
);
314 ret
= call_usermodehelper(usermode_helper
, argv
, envp
, 1);
316 dev_warn(DEV
, "helper command: %s %s %s exit code %u (0x%x)\n",
317 usermode_helper
, cmd
, mb
,
318 (ret
>> 8) & 0xff, ret
);
320 dev_info(DEV
, "helper command: %s %s %s exit code %u (0x%x)\n",
321 usermode_helper
, cmd
, mb
,
322 (ret
>> 8) & 0xff, ret
);
323 sib
.sib_reason
= SIB_HELPER_POST
;
324 sib
.helper_exit_code
= ret
;
325 drbd_bcast_event(mdev
, &sib
);
327 if (ret
< 0) /* Ignore any ERRNOs we got. */
333 static void conn_md_sync(struct drbd_tconn
*tconn
)
335 struct drbd_conf
*mdev
;
338 down_read(&drbd_cfg_rwsem
);
339 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
)
341 up_read(&drbd_cfg_rwsem
);
344 int conn_khelper(struct drbd_tconn
*tconn
, char *cmd
)
346 char *envp
[] = { "HOME=/",
348 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
349 (char[20]) { }, /* address family */
350 (char[60]) { }, /* address */
352 char *argv
[] = {usermode_helper
, cmd
, tconn
->name
, NULL
};
355 setup_khelper_env(tconn
, envp
);
358 conn_info(tconn
, "helper command: %s %s %s\n", usermode_helper
, cmd
, tconn
->name
);
359 /* TODO: conn_bcast_event() ?? */
361 ret
= call_usermodehelper(usermode_helper
, argv
, envp
, 1);
363 conn_warn(tconn
, "helper command: %s %s %s exit code %u (0x%x)\n",
364 usermode_helper
, cmd
, tconn
->name
,
365 (ret
>> 8) & 0xff, ret
);
367 conn_info(tconn
, "helper command: %s %s %s exit code %u (0x%x)\n",
368 usermode_helper
, cmd
, tconn
->name
,
369 (ret
>> 8) & 0xff, ret
);
370 /* TODO: conn_bcast_event() ?? */
372 if (ret
< 0) /* Ignore any ERRNOs we got. */
378 static enum drbd_fencing_p
highest_fencing_policy(struct drbd_tconn
*tconn
)
380 enum drbd_fencing_p fp
= FP_NOT_AVAIL
;
381 struct drbd_conf
*mdev
;
385 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
386 if (get_ldev_if_state(mdev
, D_CONSISTENT
)) {
387 fp
= max_t(enum drbd_fencing_p
, fp
,
388 rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
);
397 bool conn_try_outdate_peer(struct drbd_tconn
*tconn
)
399 union drbd_state mask
= { };
400 union drbd_state val
= { };
401 enum drbd_fencing_p fp
;
405 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
) {
406 conn_err(tconn
, "Expected cstate < C_WF_REPORT_PARAMS\n");
410 fp
= highest_fencing_policy(tconn
);
413 conn_warn(tconn
, "Not fencing peer, I'm not even Consistent myself.\n");
420 r
= conn_khelper(tconn
, "fence-peer");
422 switch ((r
>>8) & 0xff) {
423 case 3: /* peer is inconsistent */
424 ex_to_string
= "peer is inconsistent or worse";
426 val
.pdsk
= D_INCONSISTENT
;
428 case 4: /* peer got outdated, or was already outdated */
429 ex_to_string
= "peer was fenced";
431 val
.pdsk
= D_OUTDATED
;
433 case 5: /* peer was down */
434 if (conn_highest_disk(tconn
) == D_UP_TO_DATE
) {
435 /* we will(have) create(d) a new UUID anyways... */
436 ex_to_string
= "peer is unreachable, assumed to be dead";
438 val
.pdsk
= D_OUTDATED
;
440 ex_to_string
= "peer unreachable, doing nothing since disk != UpToDate";
443 case 6: /* Peer is primary, voluntarily outdate myself.
444 * This is useful when an unconnected R_SECONDARY is asked to
445 * become R_PRIMARY, but finds the other peer being active. */
446 ex_to_string
= "peer is active";
447 conn_warn(tconn
, "Peer is primary, outdating myself.\n");
449 val
.disk
= D_OUTDATED
;
452 if (fp
!= FP_STONITH
)
453 conn_err(tconn
, "fence-peer() = 7 && fencing != Stonith !!!\n");
454 ex_to_string
= "peer was stonithed";
456 val
.pdsk
= D_OUTDATED
;
459 /* The script is broken ... */
460 conn_err(tconn
, "fence-peer helper broken, returned %d\n", (r
>>8)&0xff);
461 return false; /* Eventually leave IO frozen */
464 conn_info(tconn
, "fence-peer helper returned %d (%s)\n",
465 (r
>>8) & 0xff, ex_to_string
);
470 conn_request_state(tconn, mask, val, CS_VERBOSE);
471 here, because we might were able to re-establish the connection in the
473 spin_lock_irq(&tconn
->req_lock
);
474 if (tconn
->cstate
< C_WF_REPORT_PARAMS
)
475 _conn_request_state(tconn
, mask
, val
, CS_VERBOSE
);
476 spin_unlock_irq(&tconn
->req_lock
);
478 return conn_highest_pdsk(tconn
) <= D_OUTDATED
;
481 static int _try_outdate_peer_async(void *data
)
483 struct drbd_tconn
*tconn
= (struct drbd_tconn
*)data
;
485 conn_try_outdate_peer(tconn
);
487 kref_put(&tconn
->kref
, &conn_destroy
);
491 void conn_try_outdate_peer_async(struct drbd_tconn
*tconn
)
493 struct task_struct
*opa
;
495 kref_get(&tconn
->kref
);
496 opa
= kthread_run(_try_outdate_peer_async
, tconn
, "drbd_async_h");
498 conn_err(tconn
, "out of mem, failed to invoke fence-peer helper\n");
499 kref_put(&tconn
->kref
, &conn_destroy
);
504 drbd_set_role(struct drbd_conf
*mdev
, enum drbd_role new_role
, int force
)
506 const int max_tries
= 4;
507 enum drbd_state_rv rv
= SS_UNKNOWN_ERROR
;
511 union drbd_state mask
, val
;
513 if (new_role
== R_PRIMARY
)
514 request_ping(mdev
->tconn
); /* Detect a dead peer ASAP */
516 mutex_lock(mdev
->state_mutex
);
518 mask
.i
= 0; mask
.role
= R_MASK
;
519 val
.i
= 0; val
.role
= new_role
;
521 while (try++ < max_tries
) {
522 rv
= _drbd_request_state(mdev
, mask
, val
, CS_WAIT_COMPLETE
);
524 /* in case we first succeeded to outdate,
525 * but now suddenly could establish a connection */
526 if (rv
== SS_CW_FAILED_BY_PEER
&& mask
.pdsk
!= 0) {
532 if (rv
== SS_NO_UP_TO_DATE_DISK
&& force
&&
533 (mdev
->state
.disk
< D_UP_TO_DATE
&&
534 mdev
->state
.disk
>= D_INCONSISTENT
)) {
536 val
.disk
= D_UP_TO_DATE
;
541 if (rv
== SS_NO_UP_TO_DATE_DISK
&&
542 mdev
->state
.disk
== D_CONSISTENT
&& mask
.pdsk
== 0) {
543 D_ASSERT(mdev
->state
.pdsk
== D_UNKNOWN
);
545 if (conn_try_outdate_peer(mdev
->tconn
)) {
546 val
.disk
= D_UP_TO_DATE
;
552 if (rv
== SS_NOTHING_TO_DO
)
554 if (rv
== SS_PRIMARY_NOP
&& mask
.pdsk
== 0) {
555 if (!conn_try_outdate_peer(mdev
->tconn
) && force
) {
556 dev_warn(DEV
, "Forced into split brain situation!\n");
558 val
.pdsk
= D_OUTDATED
;
563 if (rv
== SS_TWO_PRIMARIES
) {
564 /* Maybe the peer is detected as dead very soon...
565 retry at most once more in this case. */
568 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
569 timeo
= nc
? (nc
->ping_timeo
+ 1) * HZ
/ 10 : 1;
571 schedule_timeout_interruptible(timeo
);
576 if (rv
< SS_SUCCESS
) {
577 rv
= _drbd_request_state(mdev
, mask
, val
,
578 CS_VERBOSE
+ CS_WAIT_COMPLETE
);
589 dev_warn(DEV
, "Forced to consider local data as UpToDate!\n");
591 /* Wait until nothing is on the fly :) */
592 wait_event(mdev
->misc_wait
, atomic_read(&mdev
->ap_pending_cnt
) == 0);
594 if (new_role
== R_SECONDARY
) {
595 set_disk_ro(mdev
->vdisk
, true);
596 if (get_ldev(mdev
)) {
597 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
601 mutex_lock(&mdev
->tconn
->conf_update
);
602 nc
= mdev
->tconn
->net_conf
;
604 nc
->want_lose
= 0; /* without copy; single bit op is atomic */
605 mutex_unlock(&mdev
->tconn
->conf_update
);
607 set_disk_ro(mdev
->vdisk
, false);
608 if (get_ldev(mdev
)) {
609 if (((mdev
->state
.conn
< C_CONNECTED
||
610 mdev
->state
.pdsk
<= D_FAILED
)
611 && mdev
->ldev
->md
.uuid
[UI_BITMAP
] == 0) || forced
)
612 drbd_uuid_new_current(mdev
);
614 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
619 /* writeout of activity log covered areas of the bitmap
620 * to stable storage done in after state change already */
622 if (mdev
->state
.conn
>= C_WF_REPORT_PARAMS
) {
623 /* if this was forced, we should consider sync */
625 drbd_send_uuids(mdev
);
626 drbd_send_state(mdev
);
631 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
633 mutex_unlock(mdev
->state_mutex
);
637 static const char *from_attrs_err_to_txt(int err
)
639 return err
== -ENOMSG
? "required attribute missing" :
640 err
== -EOPNOTSUPP
? "unknown mandatory attribute" :
641 err
== -EEXIST
? "can not change invariant setting" :
642 "invalid attribute value";
645 int drbd_adm_set_role(struct sk_buff
*skb
, struct genl_info
*info
)
647 struct set_role_parms parms
;
649 enum drbd_ret_code retcode
;
651 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
652 if (!adm_ctx
.reply_skb
)
654 if (retcode
!= NO_ERROR
)
657 memset(&parms
, 0, sizeof(parms
));
658 if (info
->attrs
[DRBD_NLA_SET_ROLE_PARMS
]) {
659 err
= set_role_parms_from_attrs(&parms
, info
);
661 retcode
= ERR_MANDATORY_TAG
;
662 drbd_msg_put_info(from_attrs_err_to_txt(err
));
667 if (info
->genlhdr
->cmd
== DRBD_ADM_PRIMARY
)
668 retcode
= drbd_set_role(adm_ctx
.mdev
, R_PRIMARY
, parms
.assume_uptodate
);
670 retcode
= drbd_set_role(adm_ctx
.mdev
, R_SECONDARY
, 0);
672 drbd_adm_finish(info
, retcode
);
676 /* initializes the md.*_offset members, so we are able to find
677 * the on disk meta data */
678 static void drbd_md_set_sector_offsets(struct drbd_conf
*mdev
,
679 struct drbd_backing_dev
*bdev
)
681 sector_t md_size_sect
= 0;
685 meta_dev_idx
= rcu_dereference(bdev
->disk_conf
)->meta_dev_idx
;
687 switch (meta_dev_idx
) {
689 /* v07 style fixed size indexed meta data */
690 bdev
->md
.md_size_sect
= MD_RESERVED_SECT
;
691 bdev
->md
.md_offset
= drbd_md_ss__(mdev
, bdev
);
692 bdev
->md
.al_offset
= MD_AL_OFFSET
;
693 bdev
->md
.bm_offset
= MD_BM_OFFSET
;
695 case DRBD_MD_INDEX_FLEX_EXT
:
696 /* just occupy the full device; unit: sectors */
697 bdev
->md
.md_size_sect
= drbd_get_capacity(bdev
->md_bdev
);
698 bdev
->md
.md_offset
= 0;
699 bdev
->md
.al_offset
= MD_AL_OFFSET
;
700 bdev
->md
.bm_offset
= MD_BM_OFFSET
;
702 case DRBD_MD_INDEX_INTERNAL
:
703 case DRBD_MD_INDEX_FLEX_INT
:
704 bdev
->md
.md_offset
= drbd_md_ss__(mdev
, bdev
);
705 /* al size is still fixed */
706 bdev
->md
.al_offset
= -MD_AL_SECTORS
;
707 /* we need (slightly less than) ~ this much bitmap sectors: */
708 md_size_sect
= drbd_get_capacity(bdev
->backing_bdev
);
709 md_size_sect
= ALIGN(md_size_sect
, BM_SECT_PER_EXT
);
710 md_size_sect
= BM_SECT_TO_EXT(md_size_sect
);
711 md_size_sect
= ALIGN(md_size_sect
, 8);
713 /* plus the "drbd meta data super block",
714 * and the activity log; */
715 md_size_sect
+= MD_BM_OFFSET
;
717 bdev
->md
.md_size_sect
= md_size_sect
;
718 /* bitmap offset is adjusted by 'super' block size */
719 bdev
->md
.bm_offset
= -md_size_sect
+ MD_AL_OFFSET
;
725 /* input size is expected to be in KB */
726 char *ppsize(char *buf
, unsigned long long size
)
728 /* Needs 9 bytes at max including trailing NUL:
729 * -1ULL ==> "16384 EB" */
730 static char units
[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
732 while (size
>= 10000 && base
< sizeof(units
)-1) {
734 size
= (size
>> 10) + !!(size
& (1<<9));
737 sprintf(buf
, "%u %cB", (unsigned)size
, units
[base
]);
742 /* there is still a theoretical deadlock when called from receiver
743 * on an D_INCONSISTENT R_PRIMARY:
744 * remote READ does inc_ap_bio, receiver would need to receive answer
745 * packet from remote to dec_ap_bio again.
746 * receiver receive_sizes(), comes here,
747 * waits for ap_bio_cnt == 0. -> deadlock.
748 * but this cannot happen, actually, because:
749 * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable
750 * (not connected, or bad/no disk on peer):
751 * see drbd_fail_request_early, ap_bio_cnt is zero.
752 * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET:
753 * peer may not initiate a resize.
755 /* Note these are not to be confused with
756 * drbd_adm_suspend_io/drbd_adm_resume_io,
757 * which are (sub) state changes triggered by admin (drbdsetup),
758 * and can be long lived.
759 * This changes an mdev->flag, is triggered by drbd internals,
760 * and should be short-lived. */
761 void drbd_suspend_io(struct drbd_conf
*mdev
)
763 set_bit(SUSPEND_IO
, &mdev
->flags
);
764 if (drbd_suspended(mdev
))
766 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_bio_cnt
));
769 void drbd_resume_io(struct drbd_conf
*mdev
)
771 clear_bit(SUSPEND_IO
, &mdev
->flags
);
772 wake_up(&mdev
->misc_wait
);
776 * drbd_determine_dev_size() - Sets the right device size obeying all constraints
777 * @mdev: DRBD device.
779 * Returns 0 on success, negative return values indicate errors.
780 * You should call drbd_md_sync() after calling this function.
782 enum determine_dev_size
drbd_determine_dev_size(struct drbd_conf
*mdev
, enum dds_flags flags
) __must_hold(local
)
784 sector_t prev_first_sect
, prev_size
; /* previous meta location */
785 sector_t la_size
, u_size
;
789 int md_moved
, la_size_changed
;
790 enum determine_dev_size rv
= unchanged
;
793 * application request passes inc_ap_bio,
794 * but then cannot get an AL-reference.
795 * this function later may wait on ap_bio_cnt == 0. -> deadlock.
798 * Suspend IO right here.
799 * still lock the act_log to not trigger ASSERTs there.
801 drbd_suspend_io(mdev
);
803 /* no wait necessary anymore, actually we could assert that */
804 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
806 prev_first_sect
= drbd_md_first_sector(mdev
->ldev
);
807 prev_size
= mdev
->ldev
->md
.md_size_sect
;
808 la_size
= mdev
->ldev
->md
.la_size_sect
;
810 /* TODO: should only be some assert here, not (re)init... */
811 drbd_md_set_sector_offsets(mdev
, mdev
->ldev
);
814 u_size
= rcu_dereference(mdev
->ldev
->disk_conf
)->disk_size
;
816 size
= drbd_new_dev_size(mdev
, mdev
->ldev
, u_size
, flags
& DDSF_FORCED
);
818 if (drbd_get_capacity(mdev
->this_bdev
) != size
||
819 drbd_bm_capacity(mdev
) != size
) {
821 err
= drbd_bm_resize(mdev
, size
, !(flags
& DDSF_NO_RESYNC
));
823 /* currently there is only one error: ENOMEM! */
824 size
= drbd_bm_capacity(mdev
)>>1;
826 dev_err(DEV
, "OUT OF MEMORY! "
827 "Could not allocate bitmap!\n");
829 dev_err(DEV
, "BM resizing failed. "
830 "Leaving size unchanged at size = %lu KB\n",
831 (unsigned long)size
);
835 /* racy, see comments above. */
836 drbd_set_my_capacity(mdev
, size
);
837 mdev
->ldev
->md
.la_size_sect
= size
;
838 dev_info(DEV
, "size = %s (%llu KB)\n", ppsize(ppb
, size
>>1),
839 (unsigned long long)size
>>1);
841 if (rv
== dev_size_error
)
844 la_size_changed
= (la_size
!= mdev
->ldev
->md
.la_size_sect
);
846 md_moved
= prev_first_sect
!= drbd_md_first_sector(mdev
->ldev
)
847 || prev_size
!= mdev
->ldev
->md
.md_size_sect
;
849 if (la_size_changed
|| md_moved
) {
852 drbd_al_shrink(mdev
); /* All extents inactive. */
853 dev_info(DEV
, "Writing the whole bitmap, %s\n",
854 la_size_changed
&& md_moved
? "size changed and md moved" :
855 la_size_changed
? "size changed" : "md moved");
856 /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
857 err
= drbd_bitmap_io(mdev
, &drbd_bm_write
,
858 "size changed", BM_LOCKED_MASK
);
863 drbd_md_mark_dirty(mdev
);
871 lc_unlock(mdev
->act_log
);
872 wake_up(&mdev
->al_wait
);
873 drbd_resume_io(mdev
);
879 drbd_new_dev_size(struct drbd_conf
*mdev
, struct drbd_backing_dev
*bdev
,
880 sector_t u_size
, int assume_peer_has_space
)
882 sector_t p_size
= mdev
->p_size
; /* partner's disk size. */
883 sector_t la_size
= bdev
->md
.la_size_sect
; /* last agreed size. */
884 sector_t m_size
; /* my size */
887 m_size
= drbd_get_max_capacity(bdev
);
889 if (mdev
->state
.conn
< C_CONNECTED
&& assume_peer_has_space
) {
890 dev_warn(DEV
, "Resize while not connected was forced by the user!\n");
894 if (p_size
&& m_size
) {
895 size
= min_t(sector_t
, p_size
, m_size
);
899 if (m_size
&& m_size
< size
)
901 if (p_size
&& p_size
< size
)
912 dev_err(DEV
, "Both nodes diskless!\n");
916 dev_err(DEV
, "Requested disk size is too big (%lu > %lu)\n",
917 (unsigned long)u_size
>>1, (unsigned long)size
>>1);
926 * drbd_check_al_size() - Ensures that the AL is of the right size
927 * @mdev: DRBD device.
929 * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation
930 * failed, and 0 on success. You should call drbd_md_sync() after you called
933 static int drbd_check_al_size(struct drbd_conf
*mdev
, struct disk_conf
*dc
)
935 struct lru_cache
*n
, *t
;
936 struct lc_element
*e
;
941 mdev
->act_log
->nr_elements
== dc
->al_extents
)
946 n
= lc_create("act_log", drbd_al_ext_cache
, AL_UPDATES_PER_TRANSACTION
,
947 dc
->al_extents
, sizeof(struct lc_element
), 0);
950 dev_err(DEV
, "Cannot allocate act_log lru!\n");
953 spin_lock_irq(&mdev
->al_lock
);
955 for (i
= 0; i
< t
->nr_elements
; i
++) {
956 e
= lc_element_by_index(t
, i
);
958 dev_err(DEV
, "refcnt(%d)==%d\n",
959 e
->lc_number
, e
->refcnt
);
965 spin_unlock_irq(&mdev
->al_lock
);
967 dev_err(DEV
, "Activity log still in use!\n");
974 drbd_md_mark_dirty(mdev
); /* we changed mdev->act_log->nr_elemens */
978 static void drbd_setup_queue_param(struct drbd_conf
*mdev
, unsigned int max_bio_size
)
980 struct request_queue
* const q
= mdev
->rq_queue
;
981 int max_hw_sectors
= max_bio_size
>> 9;
982 int max_segments
= 0;
984 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
985 struct request_queue
* const b
= mdev
->ldev
->backing_bdev
->bd_disk
->queue
;
987 max_hw_sectors
= min(queue_max_hw_sectors(b
), max_bio_size
>> 9);
989 max_segments
= rcu_dereference(mdev
->ldev
->disk_conf
)->max_bio_bvecs
;
994 blk_queue_logical_block_size(q
, 512);
995 blk_queue_max_hw_sectors(q
, max_hw_sectors
);
996 /* This is the workaround for "bio would need to, but cannot, be split" */
997 blk_queue_max_segments(q
, max_segments
? max_segments
: BLK_MAX_SEGMENTS
);
998 blk_queue_segment_boundary(q
, PAGE_CACHE_SIZE
-1);
1000 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
1001 struct request_queue
* const b
= mdev
->ldev
->backing_bdev
->bd_disk
->queue
;
1003 blk_queue_stack_limits(q
, b
);
1005 if (q
->backing_dev_info
.ra_pages
!= b
->backing_dev_info
.ra_pages
) {
1006 dev_info(DEV
, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
1007 q
->backing_dev_info
.ra_pages
,
1008 b
->backing_dev_info
.ra_pages
);
1009 q
->backing_dev_info
.ra_pages
= b
->backing_dev_info
.ra_pages
;
1015 void drbd_reconsider_max_bio_size(struct drbd_conf
*mdev
)
1017 int now
, new, local
, peer
;
1019 now
= queue_max_hw_sectors(mdev
->rq_queue
) << 9;
1020 local
= mdev
->local_max_bio_size
; /* Eventually last known value, from volatile memory */
1021 peer
= mdev
->peer_max_bio_size
; /* Eventually last known value, from meta data */
1023 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
1024 local
= queue_max_hw_sectors(mdev
->ldev
->backing_bdev
->bd_disk
->queue
) << 9;
1025 mdev
->local_max_bio_size
= local
;
1029 /* We may ignore peer limits if the peer is modern enough.
1030 Because new from 8.3.8 onwards the peer can use multiple
1031 BIOs for a single peer_request */
1032 if (mdev
->state
.conn
>= C_CONNECTED
) {
1033 if (mdev
->tconn
->agreed_pro_version
< 94)
1034 peer
= mdev
->peer_max_bio_size
;
1035 else if (mdev
->tconn
->agreed_pro_version
== 94)
1036 peer
= DRBD_MAX_SIZE_H80_PACKET
;
1037 else /* drbd 8.3.8 onwards */
1038 peer
= DRBD_MAX_BIO_SIZE
;
1041 new = min_t(int, local
, peer
);
1043 if (mdev
->state
.role
== R_PRIMARY
&& new < now
)
1044 dev_err(DEV
, "ASSERT FAILED new < now; (%d < %d)\n", new, now
);
1047 dev_info(DEV
, "max BIO size = %u\n", new);
1049 drbd_setup_queue_param(mdev
, new);
1052 /* Starts the worker thread */
1053 static void conn_reconfig_start(struct drbd_tconn
*tconn
)
1055 drbd_thread_start(&tconn
->worker
);
1056 conn_flush_workqueue(tconn
);
1059 /* if still unconfigured, stops worker again. */
1060 static void conn_reconfig_done(struct drbd_tconn
*tconn
)
1063 spin_lock_irq(&tconn
->req_lock
);
1064 stop_threads
= conn_all_vols_unconf(tconn
);
1065 spin_unlock_irq(&tconn
->req_lock
);
1067 /* asender is implicitly stopped by receiver
1068 * in drbd_disconnect() */
1069 drbd_thread_stop(&tconn
->receiver
);
1070 drbd_thread_stop(&tconn
->worker
);
1074 /* Make sure IO is suspended before calling this function(). */
1075 static void drbd_suspend_al(struct drbd_conf
*mdev
)
1079 if (!lc_try_lock(mdev
->act_log
)) {
1080 dev_warn(DEV
, "Failed to lock al in drbd_suspend_al()\n");
1084 drbd_al_shrink(mdev
);
1085 spin_lock_irq(&mdev
->tconn
->req_lock
);
1086 if (mdev
->state
.conn
< C_CONNECTED
)
1087 s
= !test_and_set_bit(AL_SUSPENDED
, &mdev
->flags
);
1088 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1089 lc_unlock(mdev
->act_log
);
1092 dev_info(DEV
, "Suspended AL updates\n");
1096 static bool should_set_defaults(struct genl_info
*info
)
1098 unsigned flags
= ((struct drbd_genlmsghdr
*)info
->userhdr
)->flags
;
1099 return 0 != (flags
& DRBD_GENL_F_SET_DEFAULTS
);
1102 static void enforce_disk_conf_limits(struct disk_conf
*dc
)
1104 if (dc
->al_extents
< DRBD_AL_EXTENTS_MIN
)
1105 dc
->al_extents
= DRBD_AL_EXTENTS_MIN
;
1106 if (dc
->al_extents
> DRBD_AL_EXTENTS_MAX
)
1107 dc
->al_extents
= DRBD_AL_EXTENTS_MAX
;
1109 if (dc
->c_plan_ahead
> DRBD_C_PLAN_AHEAD_MAX
)
1110 dc
->c_plan_ahead
= DRBD_C_PLAN_AHEAD_MAX
;
1113 int drbd_adm_disk_opts(struct sk_buff
*skb
, struct genl_info
*info
)
1115 enum drbd_ret_code retcode
;
1116 struct drbd_conf
*mdev
;
1117 struct disk_conf
*new_disk_conf
, *old_disk_conf
;
1118 struct fifo_buffer
*old_plan
= NULL
, *new_plan
= NULL
;
1121 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1122 if (!adm_ctx
.reply_skb
)
1124 if (retcode
!= NO_ERROR
)
1127 mdev
= adm_ctx
.mdev
;
1129 /* we also need a disk
1130 * to change the options on */
1131 if (!get_ldev(mdev
)) {
1132 retcode
= ERR_NO_DISK
;
1136 new_disk_conf
= kmalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
1137 if (!new_disk_conf
) {
1138 retcode
= ERR_NOMEM
;
1142 mutex_lock(&mdev
->tconn
->conf_update
);
1143 old_disk_conf
= mdev
->ldev
->disk_conf
;
1144 *new_disk_conf
= *old_disk_conf
;
1145 if (should_set_defaults(info
))
1146 set_disk_conf_defaults(new_disk_conf
);
1148 err
= disk_conf_from_attrs_for_change(new_disk_conf
, info
);
1150 retcode
= ERR_MANDATORY_TAG
;
1151 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1154 if (!expect(new_disk_conf
->resync_rate
>= 1))
1155 new_disk_conf
->resync_rate
= 1;
1157 enforce_disk_conf_limits(new_disk_conf
);
1159 fifo_size
= (new_disk_conf
->c_plan_ahead
* 10 * SLEEP_TIME
) / HZ
;
1160 if (fifo_size
!= mdev
->rs_plan_s
->size
) {
1161 new_plan
= fifo_alloc(fifo_size
);
1163 dev_err(DEV
, "kmalloc of fifo_buffer failed");
1164 retcode
= ERR_NOMEM
;
1169 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
1170 drbd_al_shrink(mdev
);
1171 err
= drbd_check_al_size(mdev
, new_disk_conf
);
1172 lc_unlock(mdev
->act_log
);
1173 wake_up(&mdev
->al_wait
);
1176 retcode
= ERR_NOMEM
;
1180 write_lock_irq(&global_state_lock
);
1181 retcode
= drbd_sync_after_valid(mdev
, new_disk_conf
->resync_after
);
1182 if (retcode
== NO_ERROR
) {
1183 rcu_assign_pointer(mdev
->ldev
->disk_conf
, new_disk_conf
);
1184 drbd_sync_after_changed(mdev
);
1186 write_unlock_irq(&global_state_lock
);
1188 if (retcode
!= NO_ERROR
)
1192 old_plan
= mdev
->rs_plan_s
;
1193 rcu_assign_pointer(mdev
->rs_plan_s
, new_plan
);
1198 if (mdev
->state
.conn
>= C_CONNECTED
)
1199 drbd_send_sync_param(mdev
);
1201 mutex_unlock(&mdev
->tconn
->conf_update
);
1203 kfree(old_disk_conf
);
1208 mutex_unlock(&mdev
->tconn
->conf_update
);
1210 kfree(new_disk_conf
);
1215 drbd_adm_finish(info
, retcode
);
1219 int drbd_adm_attach(struct sk_buff
*skb
, struct genl_info
*info
)
1221 struct drbd_conf
*mdev
;
1223 enum drbd_ret_code retcode
;
1224 enum determine_dev_size dd
;
1225 sector_t max_possible_sectors
;
1226 sector_t min_md_device_sectors
;
1227 struct drbd_backing_dev
*nbc
= NULL
; /* new_backing_conf */
1228 struct disk_conf
*new_disk_conf
= NULL
;
1229 struct block_device
*bdev
;
1230 struct lru_cache
*resync_lru
= NULL
;
1231 struct fifo_buffer
*new_plan
= NULL
;
1232 union drbd_state ns
, os
;
1233 enum drbd_state_rv rv
;
1234 struct net_conf
*nc
;
1235 int cp_discovered
= 0;
1237 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1238 if (!adm_ctx
.reply_skb
)
1240 if (retcode
!= NO_ERROR
)
1243 mdev
= adm_ctx
.mdev
;
1244 conn_reconfig_start(mdev
->tconn
);
1246 /* if you want to reconfigure, please tear down first */
1247 if (mdev
->state
.disk
> D_DISKLESS
) {
1248 retcode
= ERR_DISK_CONFIGURED
;
1251 /* It may just now have detached because of IO error. Make sure
1252 * drbd_ldev_destroy is done already, we may end up here very fast,
1253 * e.g. if someone calls attach from the on-io-error handler,
1254 * to realize a "hot spare" feature (not that I'd recommend that) */
1255 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->local_cnt
));
1257 /* allocation not in the IO path, drbdsetup context */
1258 nbc
= kzalloc(sizeof(struct drbd_backing_dev
), GFP_KERNEL
);
1260 retcode
= ERR_NOMEM
;
1263 new_disk_conf
= kzalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
1264 if (!new_disk_conf
) {
1265 retcode
= ERR_NOMEM
;
1268 nbc
->disk_conf
= new_disk_conf
;
1270 set_disk_conf_defaults(new_disk_conf
);
1271 err
= disk_conf_from_attrs(new_disk_conf
, info
);
1273 retcode
= ERR_MANDATORY_TAG
;
1274 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1278 enforce_disk_conf_limits(new_disk_conf
);
1280 new_plan
= fifo_alloc((new_disk_conf
->c_plan_ahead
* 10 * SLEEP_TIME
) / HZ
);
1282 retcode
= ERR_NOMEM
;
1286 if (new_disk_conf
->meta_dev_idx
< DRBD_MD_INDEX_FLEX_INT
) {
1287 retcode
= ERR_MD_IDX_INVALID
;
1292 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
1294 if (new_disk_conf
->fencing
== FP_STONITH
&& nc
->wire_protocol
== DRBD_PROT_A
) {
1296 retcode
= ERR_STONITH_AND_PROT_A
;
1302 bdev
= blkdev_get_by_path(new_disk_conf
->backing_dev
,
1303 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
, mdev
);
1305 dev_err(DEV
, "open(\"%s\") failed with %ld\n", new_disk_conf
->backing_dev
,
1307 retcode
= ERR_OPEN_DISK
;
1310 nbc
->backing_bdev
= bdev
;
1313 * meta_dev_idx >= 0: external fixed size, possibly multiple
1314 * drbd sharing one meta device. TODO in that case, paranoia
1315 * check that [md_bdev, meta_dev_idx] is not yet used by some
1316 * other drbd minor! (if you use drbd.conf + drbdadm, that
1317 * should check it for you already; but if you don't, or
1318 * someone fooled it, we need to double check here)
1320 bdev
= blkdev_get_by_path(new_disk_conf
->meta_dev
,
1321 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
,
1322 (new_disk_conf
->meta_dev_idx
< 0) ?
1323 (void *)mdev
: (void *)drbd_m_holder
);
1325 dev_err(DEV
, "open(\"%s\") failed with %ld\n", new_disk_conf
->meta_dev
,
1327 retcode
= ERR_OPEN_MD_DISK
;
1330 nbc
->md_bdev
= bdev
;
1332 if ((nbc
->backing_bdev
== nbc
->md_bdev
) !=
1333 (new_disk_conf
->meta_dev_idx
== DRBD_MD_INDEX_INTERNAL
||
1334 new_disk_conf
->meta_dev_idx
== DRBD_MD_INDEX_FLEX_INT
)) {
1335 retcode
= ERR_MD_IDX_INVALID
;
1339 resync_lru
= lc_create("resync", drbd_bm_ext_cache
,
1340 1, 61, sizeof(struct bm_extent
),
1341 offsetof(struct bm_extent
, lce
));
1343 retcode
= ERR_NOMEM
;
1347 /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */
1348 drbd_md_set_sector_offsets(mdev
, nbc
);
1350 if (drbd_get_max_capacity(nbc
) < new_disk_conf
->disk_size
) {
1351 dev_err(DEV
, "max capacity %llu smaller than disk size %llu\n",
1352 (unsigned long long) drbd_get_max_capacity(nbc
),
1353 (unsigned long long) new_disk_conf
->disk_size
);
1354 retcode
= ERR_DISK_TO_SMALL
;
1358 if (new_disk_conf
->meta_dev_idx
< 0) {
1359 max_possible_sectors
= DRBD_MAX_SECTORS_FLEX
;
1360 /* at least one MB, otherwise it does not make sense */
1361 min_md_device_sectors
= (2<<10);
1363 max_possible_sectors
= DRBD_MAX_SECTORS
;
1364 min_md_device_sectors
= MD_RESERVED_SECT
* (new_disk_conf
->meta_dev_idx
+ 1);
1367 if (drbd_get_capacity(nbc
->md_bdev
) < min_md_device_sectors
) {
1368 retcode
= ERR_MD_DISK_TO_SMALL
;
1369 dev_warn(DEV
, "refusing attach: md-device too small, "
1370 "at least %llu sectors needed for this meta-disk type\n",
1371 (unsigned long long) min_md_device_sectors
);
1375 /* Make sure the new disk is big enough
1376 * (we may currently be R_PRIMARY with no local disk...) */
1377 if (drbd_get_max_capacity(nbc
) <
1378 drbd_get_capacity(mdev
->this_bdev
)) {
1379 retcode
= ERR_DISK_TO_SMALL
;
1383 nbc
->known_size
= drbd_get_capacity(nbc
->backing_bdev
);
1385 if (nbc
->known_size
> max_possible_sectors
) {
1386 dev_warn(DEV
, "==> truncating very big lower level device "
1387 "to currently maximum possible %llu sectors <==\n",
1388 (unsigned long long) max_possible_sectors
);
1389 if (new_disk_conf
->meta_dev_idx
>= 0)
1390 dev_warn(DEV
, "==>> using internal or flexible "
1391 "meta data may help <<==\n");
1394 drbd_suspend_io(mdev
);
1395 /* also wait for the last barrier ack. */
1396 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_pending_cnt
) || drbd_suspended(mdev
));
1397 /* and for any other previously queued work */
1398 drbd_flush_workqueue(mdev
);
1400 rv
= _drbd_request_state(mdev
, NS(disk
, D_ATTACHING
), CS_VERBOSE
);
1401 retcode
= rv
; /* FIXME: Type mismatch. */
1402 drbd_resume_io(mdev
);
1403 if (rv
< SS_SUCCESS
)
1406 if (!get_ldev_if_state(mdev
, D_ATTACHING
))
1407 goto force_diskless
;
1409 drbd_md_set_sector_offsets(mdev
, nbc
);
1411 if (!mdev
->bitmap
) {
1412 if (drbd_bm_init(mdev
)) {
1413 retcode
= ERR_NOMEM
;
1414 goto force_diskless_dec
;
1418 retcode
= drbd_md_read(mdev
, nbc
);
1419 if (retcode
!= NO_ERROR
)
1420 goto force_diskless_dec
;
1422 if (mdev
->state
.conn
< C_CONNECTED
&&
1423 mdev
->state
.role
== R_PRIMARY
&&
1424 (mdev
->ed_uuid
& ~((u64
)1)) != (nbc
->md
.uuid
[UI_CURRENT
] & ~((u64
)1))) {
1425 dev_err(DEV
, "Can only attach to data with current UUID=%016llX\n",
1426 (unsigned long long)mdev
->ed_uuid
);
1427 retcode
= ERR_DATA_NOT_CURRENT
;
1428 goto force_diskless_dec
;
1431 /* Since we are diskless, fix the activity log first... */
1432 if (drbd_check_al_size(mdev
, new_disk_conf
)) {
1433 retcode
= ERR_NOMEM
;
1434 goto force_diskless_dec
;
1437 /* Prevent shrinking of consistent devices ! */
1438 if (drbd_md_test_flag(nbc
, MDF_CONSISTENT
) &&
1439 drbd_new_dev_size(mdev
, nbc
, nbc
->disk_conf
->disk_size
, 0) < nbc
->md
.la_size_sect
) {
1440 dev_warn(DEV
, "refusing to truncate a consistent device\n");
1441 retcode
= ERR_DISK_TO_SMALL
;
1442 goto force_diskless_dec
;
1445 if (!drbd_al_read_log(mdev
, nbc
)) {
1446 retcode
= ERR_IO_MD_DISK
;
1447 goto force_diskless_dec
;
1450 /* Reset the "barriers don't work" bits here, then force meta data to
1451 * be written, to ensure we determine if barriers are supported. */
1452 if (new_disk_conf
->no_md_flush
)
1453 set_bit(MD_NO_FUA
, &mdev
->flags
);
1455 clear_bit(MD_NO_FUA
, &mdev
->flags
);
1457 /* Point of no return reached.
1458 * Devices and memory are no longer released by error cleanup below.
1459 * now mdev takes over responsibility, and the state engine should
1460 * clean it up somewhere. */
1461 D_ASSERT(mdev
->ldev
== NULL
);
1463 mdev
->resync
= resync_lru
;
1464 mdev
->rs_plan_s
= new_plan
;
1467 new_disk_conf
= NULL
;
1470 mdev
->write_ordering
= WO_bdev_flush
;
1471 drbd_bump_write_ordering(mdev
, WO_bdev_flush
);
1473 if (drbd_md_test_flag(mdev
->ldev
, MDF_CRASHED_PRIMARY
))
1474 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1476 clear_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1478 if (drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1479 !(mdev
->state
.role
== R_PRIMARY
&& mdev
->tconn
->susp_nod
)) {
1480 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1489 drbd_reconsider_max_bio_size(mdev
);
1491 /* If I am currently not R_PRIMARY,
1492 * but meta data primary indicator is set,
1493 * I just now recover from a hard crash,
1494 * and have been R_PRIMARY before that crash.
1496 * Now, if I had no connection before that crash
1497 * (have been degraded R_PRIMARY), chances are that
1498 * I won't find my peer now either.
1500 * In that case, and _only_ in that case,
1501 * we use the degr-wfc-timeout instead of the default,
1502 * so we can automatically recover from a crash of a
1503 * degraded but active "cluster" after a certain timeout.
1505 clear_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1506 if (mdev
->state
.role
!= R_PRIMARY
&&
1507 drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1508 !drbd_md_test_flag(mdev
->ldev
, MDF_CONNECTED_IND
))
1509 set_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1511 dd
= drbd_determine_dev_size(mdev
, 0);
1512 if (dd
== dev_size_error
) {
1513 retcode
= ERR_NOMEM_BITMAP
;
1514 goto force_diskless_dec
;
1515 } else if (dd
== grew
)
1516 set_bit(RESYNC_AFTER_NEG
, &mdev
->flags
);
1518 if (drbd_md_test_flag(mdev
->ldev
, MDF_FULL_SYNC
)) {
1519 dev_info(DEV
, "Assuming that all blocks are out of sync "
1520 "(aka FullSync)\n");
1521 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
1522 "set_n_write from attaching", BM_LOCKED_MASK
)) {
1523 retcode
= ERR_IO_MD_DISK
;
1524 goto force_diskless_dec
;
1527 if (drbd_bitmap_io(mdev
, &drbd_bm_read
,
1528 "read from attaching", BM_LOCKED_MASK
)) {
1529 retcode
= ERR_IO_MD_DISK
;
1530 goto force_diskless_dec
;
1534 if (cp_discovered
) {
1535 drbd_al_apply_to_bm(mdev
);
1536 if (drbd_bitmap_io(mdev
, &drbd_bm_write
,
1537 "crashed primary apply AL", BM_LOCKED_MASK
)) {
1538 retcode
= ERR_IO_MD_DISK
;
1539 goto force_diskless_dec
;
1543 if (_drbd_bm_total_weight(mdev
) == drbd_bm_bits(mdev
))
1544 drbd_suspend_al(mdev
); /* IO is still suspended here... */
1546 spin_lock_irq(&mdev
->tconn
->req_lock
);
1547 os
= drbd_read_state(mdev
);
1549 /* If MDF_CONSISTENT is not set go into inconsistent state,
1550 otherwise investigate MDF_WasUpToDate...
1551 If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
1552 otherwise into D_CONSISTENT state.
1554 if (drbd_md_test_flag(mdev
->ldev
, MDF_CONSISTENT
)) {
1555 if (drbd_md_test_flag(mdev
->ldev
, MDF_WAS_UP_TO_DATE
))
1556 ns
.disk
= D_CONSISTENT
;
1558 ns
.disk
= D_OUTDATED
;
1560 ns
.disk
= D_INCONSISTENT
;
1563 if (drbd_md_test_flag(mdev
->ldev
, MDF_PEER_OUT_DATED
))
1564 ns
.pdsk
= D_OUTDATED
;
1567 if (ns
.disk
== D_CONSISTENT
&&
1568 (ns
.pdsk
== D_OUTDATED
|| rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
== FP_DONT_CARE
))
1569 ns
.disk
= D_UP_TO_DATE
;
1572 /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
1573 MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
1574 this point, because drbd_request_state() modifies these
1577 /* In case we are C_CONNECTED postpone any decision on the new disk
1578 state after the negotiation phase. */
1579 if (mdev
->state
.conn
== C_CONNECTED
) {
1580 mdev
->new_state_tmp
.i
= ns
.i
;
1582 ns
.disk
= D_NEGOTIATING
;
1584 /* We expect to receive up-to-date UUIDs soon.
1585 To avoid a race in receive_state, free p_uuid while
1586 holding req_lock. I.e. atomic with the state change */
1587 kfree(mdev
->p_uuid
);
1588 mdev
->p_uuid
= NULL
;
1591 rv
= _drbd_set_state(mdev
, ns
, CS_VERBOSE
, NULL
);
1592 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1594 if (rv
< SS_SUCCESS
)
1595 goto force_diskless_dec
;
1597 if (mdev
->state
.role
== R_PRIMARY
)
1598 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
1600 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
1602 drbd_md_mark_dirty(mdev
);
1605 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1607 conn_reconfig_done(mdev
->tconn
);
1608 drbd_adm_finish(info
, retcode
);
1614 drbd_force_state(mdev
, NS(disk
, D_FAILED
));
1617 conn_reconfig_done(mdev
->tconn
);
1619 if (nbc
->backing_bdev
)
1620 blkdev_put(nbc
->backing_bdev
,
1621 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1623 blkdev_put(nbc
->md_bdev
,
1624 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1627 kfree(new_disk_conf
);
1628 lc_destroy(resync_lru
);
1632 drbd_adm_finish(info
, retcode
);
1636 static int adm_detach(struct drbd_conf
*mdev
)
1638 enum drbd_state_rv retcode
;
1640 drbd_suspend_io(mdev
); /* so no-one is stuck in drbd_al_begin_io */
1641 retcode
= drbd_request_state(mdev
, NS(disk
, D_FAILED
));
1642 /* D_FAILED will transition to DISKLESS. */
1643 ret
= wait_event_interruptible(mdev
->misc_wait
,
1644 mdev
->state
.disk
!= D_FAILED
);
1645 drbd_resume_io(mdev
);
1646 if ((int)retcode
== (int)SS_IS_DISKLESS
)
1647 retcode
= SS_NOTHING_TO_DO
;
1653 /* Detaching the disk is a process in multiple stages. First we need to lock
1654 * out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
1655 * Then we transition to D_DISKLESS, and wait for put_ldev() to return all
1656 * internal references as well.
1657 * Only then we have finally detached. */
1658 int drbd_adm_detach(struct sk_buff
*skb
, struct genl_info
*info
)
1660 enum drbd_ret_code retcode
;
1662 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
1663 if (!adm_ctx
.reply_skb
)
1665 if (retcode
!= NO_ERROR
)
1668 retcode
= adm_detach(adm_ctx
.mdev
);
1670 drbd_adm_finish(info
, retcode
);
1674 static bool conn_resync_running(struct drbd_tconn
*tconn
)
1676 struct drbd_conf
*mdev
;
1681 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
1682 if (mdev
->state
.conn
== C_SYNC_SOURCE
||
1683 mdev
->state
.conn
== C_SYNC_TARGET
||
1684 mdev
->state
.conn
== C_PAUSED_SYNC_S
||
1685 mdev
->state
.conn
== C_PAUSED_SYNC_T
) {
1695 static bool conn_ov_running(struct drbd_tconn
*tconn
)
1697 struct drbd_conf
*mdev
;
1702 idr_for_each_entry(&tconn
->volumes
, mdev
, vnr
) {
1703 if (mdev
->state
.conn
== C_VERIFY_S
||
1704 mdev
->state
.conn
== C_VERIFY_T
) {
1714 static enum drbd_ret_code
1715 _check_net_options(struct drbd_tconn
*tconn
, struct net_conf
*old_conf
, struct net_conf
*new_conf
)
1717 struct drbd_conf
*mdev
;
1720 if (old_conf
&& tconn
->agreed_pro_version
< 100 &&
1721 tconn
->cstate
== C_WF_REPORT_PARAMS
&&
1722 new_conf
->wire_protocol
!= old_conf
->wire_protocol
)
1723 return ERR_NEED_APV_100
;
1725 if (new_conf
->two_primaries
&&
1726 (new_conf
->wire_protocol
!= DRBD_PROT_C
))
1727 return ERR_NOT_PROTO_C
;
1729 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1730 if (get_ldev(mdev
)) {
1731 enum drbd_fencing_p fp
= rcu_dereference(mdev
->ldev
->disk_conf
)->fencing
;
1733 if (new_conf
->wire_protocol
== DRBD_PROT_A
&& fp
== FP_STONITH
)
1734 return ERR_STONITH_AND_PROT_A
;
1736 if (mdev
->state
.role
== R_PRIMARY
&& new_conf
->want_lose
)
1740 if (new_conf
->on_congestion
!= OC_BLOCK
&& new_conf
->wire_protocol
!= DRBD_PROT_A
)
1741 return ERR_CONG_NOT_PROTO_A
;
1746 static enum drbd_ret_code
1747 check_net_options(struct drbd_tconn
*tconn
, struct net_conf
*new_conf
)
1749 static enum drbd_ret_code rv
;
1750 struct drbd_conf
*mdev
;
1754 rv
= _check_net_options(tconn
, rcu_dereference(tconn
->net_conf
), new_conf
);
1757 /* tconn->volumes protected by genl_lock() here */
1758 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1759 if (!mdev
->bitmap
) {
1760 if(drbd_bm_init(mdev
))
1769 struct crypto_hash
*verify_tfm
;
1770 struct crypto_hash
*csums_tfm
;
1771 struct crypto_hash
*cram_hmac_tfm
;
1772 struct crypto_hash
*integrity_tfm
;
1778 alloc_hash(struct crypto_hash
**tfm
, char *tfm_name
, int err_alg
)
1783 *tfm
= crypto_alloc_hash(tfm_name
, 0, CRYPTO_ALG_ASYNC
);
1792 static enum drbd_ret_code
1793 alloc_crypto(struct crypto
*crypto
, struct net_conf
*new_conf
)
1795 char hmac_name
[CRYPTO_MAX_ALG_NAME
];
1796 enum drbd_ret_code rv
;
1799 rv
= alloc_hash(&crypto
->csums_tfm
, new_conf
->csums_alg
,
1803 rv
= alloc_hash(&crypto
->verify_tfm
, new_conf
->verify_alg
,
1807 rv
= alloc_hash(&crypto
->integrity_tfm
, new_conf
->integrity_alg
,
1811 if (new_conf
->cram_hmac_alg
[0] != 0) {
1812 snprintf(hmac_name
, CRYPTO_MAX_ALG_NAME
, "hmac(%s)",
1813 new_conf
->cram_hmac_alg
);
1815 rv
= alloc_hash(&crypto
->cram_hmac_tfm
, hmac_name
,
1818 if (crypto
->integrity_tfm
) {
1819 hash_size
= crypto_hash_digestsize(crypto
->integrity_tfm
);
1820 crypto
->int_dig_in
= kmalloc(hash_size
, GFP_KERNEL
);
1821 if (!crypto
->int_dig_in
)
1823 crypto
->int_dig_vv
= kmalloc(hash_size
, GFP_KERNEL
);
1824 if (!crypto
->int_dig_vv
)
1831 static void free_crypto(struct crypto
*crypto
)
1833 kfree(crypto
->int_dig_in
);
1834 kfree(crypto
->int_dig_vv
);
1835 crypto_free_hash(crypto
->cram_hmac_tfm
);
1836 crypto_free_hash(crypto
->integrity_tfm
);
1837 crypto_free_hash(crypto
->csums_tfm
);
1838 crypto_free_hash(crypto
->verify_tfm
);
1841 int drbd_adm_net_opts(struct sk_buff
*skb
, struct genl_info
*info
)
1843 enum drbd_ret_code retcode
;
1844 struct drbd_tconn
*tconn
;
1845 struct net_conf
*old_conf
, *new_conf
= NULL
;
1847 int ovr
; /* online verify running */
1848 int rsr
; /* re-sync running */
1849 struct crypto crypto
= { };
1850 bool change_integrity_alg
;
1852 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONN
);
1853 if (!adm_ctx
.reply_skb
)
1855 if (retcode
!= NO_ERROR
)
1858 tconn
= adm_ctx
.tconn
;
1860 new_conf
= kzalloc(sizeof(struct net_conf
), GFP_KERNEL
);
1862 retcode
= ERR_NOMEM
;
1866 conn_reconfig_start(tconn
);
1868 mutex_lock(&tconn
->data
.mutex
);
1869 mutex_lock(&tconn
->conf_update
);
1870 old_conf
= tconn
->net_conf
;
1873 drbd_msg_put_info("net conf missing, try connect");
1874 retcode
= ERR_INVALID_REQUEST
;
1878 *new_conf
= *old_conf
;
1879 if (should_set_defaults(info
))
1880 set_net_conf_defaults(new_conf
);
1882 err
= net_conf_from_attrs_for_change(new_conf
, info
);
1884 retcode
= ERR_MANDATORY_TAG
;
1885 drbd_msg_put_info(from_attrs_err_to_txt(err
));
1889 retcode
= check_net_options(tconn
, new_conf
);
1890 if (retcode
!= NO_ERROR
)
1893 /* re-sync running */
1894 rsr
= conn_resync_running(tconn
);
1895 if (rsr
&& strcmp(new_conf
->csums_alg
, old_conf
->csums_alg
)) {
1896 retcode
= ERR_CSUMS_RESYNC_RUNNING
;
1900 /* online verify running */
1901 ovr
= conn_ov_running(tconn
);
1902 if (ovr
&& strcmp(new_conf
->verify_alg
, old_conf
->verify_alg
)) {
1903 retcode
= ERR_VERIFY_RUNNING
;
1907 change_integrity_alg
= strcmp(old_conf
->integrity_alg
,
1908 new_conf
->integrity_alg
);
1910 retcode
= alloc_crypto(&crypto
, new_conf
);
1911 if (retcode
!= NO_ERROR
)
1914 rcu_assign_pointer(tconn
->net_conf
, new_conf
);
1917 crypto_free_hash(tconn
->csums_tfm
);
1918 tconn
->csums_tfm
= crypto
.csums_tfm
;
1919 crypto
.csums_tfm
= NULL
;
1922 crypto_free_hash(tconn
->verify_tfm
);
1923 tconn
->verify_tfm
= crypto
.verify_tfm
;
1924 crypto
.verify_tfm
= NULL
;
1927 kfree(tconn
->int_dig_in
);
1928 tconn
->int_dig_in
= crypto
.int_dig_in
;
1929 kfree(tconn
->int_dig_vv
);
1930 tconn
->int_dig_vv
= crypto
.int_dig_vv
;
1931 crypto_free_hash(tconn
->integrity_tfm
);
1932 tconn
->integrity_tfm
= crypto
.integrity_tfm
;
1933 if (change_integrity_alg
) {
1934 /* Do this without trying to take tconn->data.mutex again. */
1935 if (__drbd_send_protocol(tconn
))
1939 /* FIXME Changing cram_hmac while the connection is established is useless */
1940 crypto_free_hash(tconn
->cram_hmac_tfm
);
1941 tconn
->cram_hmac_tfm
= crypto
.cram_hmac_tfm
;
1943 mutex_unlock(&tconn
->conf_update
);
1944 mutex_unlock(&tconn
->data
.mutex
);
1948 if (tconn
->cstate
>= C_WF_REPORT_PARAMS
)
1949 drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn
)));
1954 mutex_unlock(&tconn
->conf_update
);
1955 mutex_unlock(&tconn
->data
.mutex
);
1956 free_crypto(&crypto
);
1959 conn_reconfig_done(tconn
);
1961 drbd_adm_finish(info
, retcode
);
1965 int drbd_adm_connect(struct sk_buff
*skb
, struct genl_info
*info
)
1967 struct drbd_conf
*mdev
;
1968 struct net_conf
*old_conf
, *new_conf
= NULL
;
1969 struct crypto crypto
= { };
1970 struct drbd_tconn
*oconn
;
1971 struct drbd_tconn
*tconn
;
1972 struct sockaddr
*new_my_addr
, *new_peer_addr
, *taken_addr
;
1973 enum drbd_ret_code retcode
;
1977 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONN
);
1978 if (!adm_ctx
.reply_skb
)
1980 if (retcode
!= NO_ERROR
)
1983 tconn
= adm_ctx
.tconn
;
1984 conn_reconfig_start(tconn
);
1986 if (tconn
->cstate
> C_STANDALONE
) {
1987 retcode
= ERR_NET_CONFIGURED
;
1991 /* allocation not in the IO path, cqueue thread context */
1992 new_conf
= kzalloc(sizeof(*new_conf
), GFP_KERNEL
);
1994 retcode
= ERR_NOMEM
;
1998 set_net_conf_defaults(new_conf
);
2000 err
= net_conf_from_attrs(new_conf
, info
);
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
)
2013 new_my_addr
= (struct sockaddr
*)&new_conf
->my_addr
;
2014 new_peer_addr
= (struct sockaddr
*)&new_conf
->peer_addr
;
2016 /* No need to take drbd_cfg_rwsem here. All reconfiguration is
2017 * strictly serialized on genl_lock(). We are protected against
2018 * concurrent reconfiguration/addition/deletion */
2019 list_for_each_entry(oconn
, &drbd_tconns
, all_tconn
) {
2020 struct net_conf
*nc
;
2025 nc
= rcu_dereference(oconn
->net_conf
);
2027 taken_addr
= (struct sockaddr
*)&nc
->my_addr
;
2028 if (new_conf
->my_addr_len
== nc
->my_addr_len
&&
2029 !memcmp(new_my_addr
, taken_addr
, new_conf
->my_addr_len
))
2030 retcode
= ERR_LOCAL_ADDR
;
2032 taken_addr
= (struct sockaddr
*)&nc
->peer_addr
;
2033 if (new_conf
->peer_addr_len
== nc
->peer_addr_len
&&
2034 !memcmp(new_peer_addr
, taken_addr
, new_conf
->peer_addr_len
))
2035 retcode
= ERR_PEER_ADDR
;
2038 if (retcode
!= NO_ERROR
)
2042 retcode
= alloc_crypto(&crypto
, new_conf
);
2043 if (retcode
!= NO_ERROR
)
2046 ((char *)new_conf
->shared_secret
)[SHARED_SECRET_MAX
-1] = 0;
2048 conn_flush_workqueue(tconn
);
2050 mutex_lock(&tconn
->conf_update
);
2051 old_conf
= tconn
->net_conf
;
2053 retcode
= ERR_NET_CONFIGURED
;
2054 mutex_unlock(&tconn
->conf_update
);
2057 rcu_assign_pointer(tconn
->net_conf
, new_conf
);
2059 conn_free_crypto(tconn
);
2060 tconn
->int_dig_in
= crypto
.int_dig_in
;
2061 tconn
->int_dig_vv
= crypto
.int_dig_vv
;
2062 tconn
->cram_hmac_tfm
= crypto
.cram_hmac_tfm
;
2063 tconn
->integrity_tfm
= crypto
.integrity_tfm
;
2064 tconn
->csums_tfm
= crypto
.csums_tfm
;
2065 tconn
->verify_tfm
= crypto
.verify_tfm
;
2067 mutex_unlock(&tconn
->conf_update
);
2070 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
2076 retcode
= conn_request_state(tconn
, NS(conn
, C_UNCONNECTED
), CS_VERBOSE
);
2078 conn_reconfig_done(tconn
);
2079 drbd_adm_finish(info
, retcode
);
2083 free_crypto(&crypto
);
2086 conn_reconfig_done(tconn
);
2088 drbd_adm_finish(info
, retcode
);
2092 static enum drbd_state_rv
conn_try_disconnect(struct drbd_tconn
*tconn
, bool force
)
2094 enum drbd_state_rv rv
;
2096 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
),
2097 force
? CS_HARD
: 0);
2100 case SS_NOTHING_TO_DO
:
2102 case SS_ALREADY_STANDALONE
:
2104 case SS_PRIMARY_NOP
:
2105 /* Our state checking code wants to see the peer outdated. */
2106 rv
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
2107 pdsk
, D_OUTDATED
), CS_VERBOSE
);
2109 case SS_CW_FAILED_BY_PEER
:
2110 /* The peer probably wants to see us outdated. */
2111 rv
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
2112 disk
, D_OUTDATED
), 0);
2113 if (rv
== SS_IS_DISKLESS
|| rv
== SS_LOWER_THAN_OUTDATED
) {
2114 rv
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
),
2119 /* no special handling necessary */
2122 if (rv
>= SS_SUCCESS
) {
2123 enum drbd_state_rv rv2
;
2124 /* No one else can reconfigure the network while I am here.
2125 * The state handling only uses drbd_thread_stop_nowait(),
2126 * we want to really wait here until the receiver is no more.
2128 drbd_thread_stop(&adm_ctx
.tconn
->receiver
);
2130 /* Race breaker. This additional state change request may be
2131 * necessary, if this was a forced disconnect during a receiver
2132 * restart. We may have "killed" the receiver thread just
2133 * after drbdd_init() returned. Typically, we should be
2134 * C_STANDALONE already, now, and this becomes a no-op.
2136 rv2
= conn_request_state(tconn
, NS(conn
, C_STANDALONE
),
2137 CS_VERBOSE
| CS_HARD
);
2138 if (rv2
< SS_SUCCESS
)
2140 "unexpected rv2=%d in conn_try_disconnect()\n",
2146 int drbd_adm_disconnect(struct sk_buff
*skb
, struct genl_info
*info
)
2148 struct disconnect_parms parms
;
2149 struct drbd_tconn
*tconn
;
2150 enum drbd_state_rv rv
;
2151 enum drbd_ret_code retcode
;
2154 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONN
);
2155 if (!adm_ctx
.reply_skb
)
2157 if (retcode
!= NO_ERROR
)
2160 tconn
= adm_ctx
.tconn
;
2161 memset(&parms
, 0, sizeof(parms
));
2162 if (info
->attrs
[DRBD_NLA_DISCONNECT_PARMS
]) {
2163 err
= disconnect_parms_from_attrs(&parms
, info
);
2165 retcode
= ERR_MANDATORY_TAG
;
2166 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2171 rv
= conn_try_disconnect(tconn
, parms
.force_disconnect
);
2172 if (rv
< SS_SUCCESS
)
2173 retcode
= rv
; /* FIXME: Type mismatch. */
2177 drbd_adm_finish(info
, retcode
);
2181 void resync_after_online_grow(struct drbd_conf
*mdev
)
2183 int iass
; /* I am sync source */
2185 dev_info(DEV
, "Resync of new storage after online grow\n");
2186 if (mdev
->state
.role
!= mdev
->state
.peer
)
2187 iass
= (mdev
->state
.role
== R_PRIMARY
);
2189 iass
= test_bit(DISCARD_CONCURRENT
, &mdev
->tconn
->flags
);
2192 drbd_start_resync(mdev
, C_SYNC_SOURCE
);
2194 _drbd_request_state(mdev
, NS(conn
, C_WF_SYNC_UUID
), CS_VERBOSE
+ CS_SERIALIZE
);
2197 int drbd_adm_resize(struct sk_buff
*skb
, struct genl_info
*info
)
2199 struct disk_conf
*old_disk_conf
, *new_disk_conf
= NULL
;
2200 struct resize_parms rs
;
2201 struct drbd_conf
*mdev
;
2202 enum drbd_ret_code retcode
;
2203 enum determine_dev_size dd
;
2204 enum dds_flags ddsf
;
2208 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2209 if (!adm_ctx
.reply_skb
)
2211 if (retcode
!= NO_ERROR
)
2214 memset(&rs
, 0, sizeof(struct resize_parms
));
2215 if (info
->attrs
[DRBD_NLA_RESIZE_PARMS
]) {
2216 err
= resize_parms_from_attrs(&rs
, info
);
2218 retcode
= ERR_MANDATORY_TAG
;
2219 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2224 mdev
= adm_ctx
.mdev
;
2225 if (mdev
->state
.conn
> C_CONNECTED
) {
2226 retcode
= ERR_RESIZE_RESYNC
;
2230 if (mdev
->state
.role
== R_SECONDARY
&&
2231 mdev
->state
.peer
== R_SECONDARY
) {
2232 retcode
= ERR_NO_PRIMARY
;
2236 if (!get_ldev(mdev
)) {
2237 retcode
= ERR_NO_DISK
;
2241 if (rs
.no_resync
&& mdev
->tconn
->agreed_pro_version
< 93) {
2242 retcode
= ERR_NEED_APV_93
;
2247 u_size
= rcu_dereference(mdev
->ldev
->disk_conf
)->disk_size
;
2249 if (u_size
!= (sector_t
)rs
.resize_size
) {
2250 new_disk_conf
= kmalloc(sizeof(struct disk_conf
), GFP_KERNEL
);
2251 if (!new_disk_conf
) {
2252 retcode
= ERR_NOMEM
;
2257 if (mdev
->ldev
->known_size
!= drbd_get_capacity(mdev
->ldev
->backing_bdev
))
2258 mdev
->ldev
->known_size
= drbd_get_capacity(mdev
->ldev
->backing_bdev
);
2260 if (new_disk_conf
) {
2261 mutex_lock(&mdev
->tconn
->conf_update
);
2262 old_disk_conf
= mdev
->ldev
->disk_conf
;
2263 *new_disk_conf
= *old_disk_conf
;
2264 new_disk_conf
->disk_size
= (sector_t
)rs
.resize_size
;
2265 rcu_assign_pointer(mdev
->ldev
->disk_conf
, new_disk_conf
);
2266 mutex_unlock(&mdev
->tconn
->conf_update
);
2268 kfree(old_disk_conf
);
2271 ddsf
= (rs
.resize_force
? DDSF_FORCED
: 0) | (rs
.no_resync
? DDSF_NO_RESYNC
: 0);
2272 dd
= drbd_determine_dev_size(mdev
, ddsf
);
2275 if (dd
== dev_size_error
) {
2276 retcode
= ERR_NOMEM_BITMAP
;
2280 if (mdev
->state
.conn
== C_CONNECTED
) {
2282 set_bit(RESIZE_PENDING
, &mdev
->flags
);
2284 drbd_send_uuids(mdev
);
2285 drbd_send_sizes(mdev
, 1, ddsf
);
2289 drbd_adm_finish(info
, retcode
);
2293 void drbd_set_res_opts_defaults(struct res_opts
*r
)
2295 return set_res_opts_defaults(r
);
2298 int drbd_adm_resource_opts(struct sk_buff
*skb
, struct genl_info
*info
)
2300 enum drbd_ret_code retcode
;
2301 cpumask_var_t new_cpu_mask
;
2302 struct drbd_tconn
*tconn
;
2303 struct res_opts res_opts
;
2306 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONN
);
2307 if (!adm_ctx
.reply_skb
)
2309 if (retcode
!= NO_ERROR
)
2311 tconn
= adm_ctx
.tconn
;
2313 if (!zalloc_cpumask_var(&new_cpu_mask
, GFP_KERNEL
)) {
2314 retcode
= ERR_NOMEM
;
2315 drbd_msg_put_info("unable to allocate cpumask");
2319 res_opts
= tconn
->res_opts
;
2320 if (should_set_defaults(info
))
2321 set_res_opts_defaults(&res_opts
);
2323 err
= res_opts_from_attrs(&res_opts
, info
);
2325 retcode
= ERR_MANDATORY_TAG
;
2326 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2330 /* silently ignore cpu mask on UP kernel */
2331 if (nr_cpu_ids
> 1 && res_opts
.cpu_mask
[0] != 0) {
2332 err
= __bitmap_parse(res_opts
.cpu_mask
, 32, 0,
2333 cpumask_bits(new_cpu_mask
), nr_cpu_ids
);
2335 conn_warn(tconn
, "__bitmap_parse() failed with %d\n", err
);
2336 retcode
= ERR_CPU_MASK_PARSE
;
2342 tconn
->res_opts
= res_opts
;
2344 if (!cpumask_equal(tconn
->cpu_mask
, new_cpu_mask
)) {
2345 cpumask_copy(tconn
->cpu_mask
, new_cpu_mask
);
2346 drbd_calc_cpu_mask(tconn
);
2347 tconn
->receiver
.reset_cpu_mask
= 1;
2348 tconn
->asender
.reset_cpu_mask
= 1;
2349 tconn
->worker
.reset_cpu_mask
= 1;
2353 free_cpumask_var(new_cpu_mask
);
2355 drbd_adm_finish(info
, retcode
);
2359 int drbd_adm_invalidate(struct sk_buff
*skb
, struct genl_info
*info
)
2361 struct drbd_conf
*mdev
;
2362 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2364 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2365 if (!adm_ctx
.reply_skb
)
2367 if (retcode
!= NO_ERROR
)
2370 mdev
= adm_ctx
.mdev
;
2372 /* If there is still bitmap IO pending, probably because of a previous
2373 * resync just being finished, wait for it before requesting a new resync. */
2374 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2376 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
), CS_ORDERED
);
2378 if (retcode
< SS_SUCCESS
&& retcode
!= SS_NEED_CONNECTION
)
2379 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
2381 while (retcode
== SS_NEED_CONNECTION
) {
2382 spin_lock_irq(&mdev
->tconn
->req_lock
);
2383 if (mdev
->state
.conn
< C_CONNECTED
)
2384 retcode
= _drbd_set_state(_NS(mdev
, disk
, D_INCONSISTENT
), CS_VERBOSE
, NULL
);
2385 spin_unlock_irq(&mdev
->tconn
->req_lock
);
2387 if (retcode
!= SS_NEED_CONNECTION
)
2390 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
2394 drbd_adm_finish(info
, retcode
);
2398 static int drbd_bmio_set_susp_al(struct drbd_conf
*mdev
)
2402 rv
= drbd_bmio_set_n_write(mdev
);
2403 drbd_suspend_al(mdev
);
2407 static int drbd_adm_simple_request_state(struct sk_buff
*skb
, struct genl_info
*info
,
2408 union drbd_state mask
, union drbd_state val
)
2410 enum drbd_ret_code retcode
;
2412 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2413 if (!adm_ctx
.reply_skb
)
2415 if (retcode
!= NO_ERROR
)
2418 retcode
= drbd_request_state(adm_ctx
.mdev
, mask
, val
);
2420 drbd_adm_finish(info
, retcode
);
2424 int drbd_adm_invalidate_peer(struct sk_buff
*skb
, struct genl_info
*info
)
2426 return drbd_adm_simple_request_state(skb
, info
, NS(conn
, C_STARTING_SYNC_S
));
2429 int drbd_adm_pause_sync(struct sk_buff
*skb
, struct genl_info
*info
)
2431 enum drbd_ret_code retcode
;
2433 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2434 if (!adm_ctx
.reply_skb
)
2436 if (retcode
!= NO_ERROR
)
2439 if (drbd_request_state(adm_ctx
.mdev
, NS(user_isp
, 1)) == SS_NOTHING_TO_DO
)
2440 retcode
= ERR_PAUSE_IS_SET
;
2442 drbd_adm_finish(info
, retcode
);
2446 int drbd_adm_resume_sync(struct sk_buff
*skb
, struct genl_info
*info
)
2448 union drbd_dev_state s
;
2449 enum drbd_ret_code retcode
;
2451 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2452 if (!adm_ctx
.reply_skb
)
2454 if (retcode
!= NO_ERROR
)
2457 if (drbd_request_state(adm_ctx
.mdev
, NS(user_isp
, 0)) == SS_NOTHING_TO_DO
) {
2458 s
= adm_ctx
.mdev
->state
;
2459 if (s
.conn
== C_PAUSED_SYNC_S
|| s
.conn
== C_PAUSED_SYNC_T
) {
2460 retcode
= s
.aftr_isp
? ERR_PIC_AFTER_DEP
:
2461 s
.peer_isp
? ERR_PIC_PEER_DEP
: ERR_PAUSE_IS_CLEAR
;
2463 retcode
= ERR_PAUSE_IS_CLEAR
;
2468 drbd_adm_finish(info
, retcode
);
2472 int drbd_adm_suspend_io(struct sk_buff
*skb
, struct genl_info
*info
)
2474 return drbd_adm_simple_request_state(skb
, info
, NS(susp
, 1));
2477 int drbd_adm_resume_io(struct sk_buff
*skb
, struct genl_info
*info
)
2479 struct drbd_conf
*mdev
;
2480 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
2482 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2483 if (!adm_ctx
.reply_skb
)
2485 if (retcode
!= NO_ERROR
)
2488 mdev
= adm_ctx
.mdev
;
2489 if (test_bit(NEW_CUR_UUID
, &mdev
->flags
)) {
2490 drbd_uuid_new_current(mdev
);
2491 clear_bit(NEW_CUR_UUID
, &mdev
->flags
);
2493 drbd_suspend_io(mdev
);
2494 retcode
= drbd_request_state(mdev
, NS3(susp
, 0, susp_nod
, 0, susp_fen
, 0));
2495 if (retcode
== SS_SUCCESS
) {
2496 if (mdev
->state
.conn
< C_CONNECTED
)
2497 tl_clear(mdev
->tconn
);
2498 if (mdev
->state
.disk
== D_DISKLESS
|| mdev
->state
.disk
== D_FAILED
)
2499 tl_restart(mdev
->tconn
, FAIL_FROZEN_DISK_IO
);
2501 drbd_resume_io(mdev
);
2504 drbd_adm_finish(info
, retcode
);
2508 int drbd_adm_outdate(struct sk_buff
*skb
, struct genl_info
*info
)
2510 return drbd_adm_simple_request_state(skb
, info
, NS(disk
, D_OUTDATED
));
2513 int nla_put_drbd_cfg_context(struct sk_buff
*skb
, const char *conn_name
, unsigned vnr
)
2516 nla
= nla_nest_start(skb
, DRBD_NLA_CFG_CONTEXT
);
2518 goto nla_put_failure
;
2519 if (vnr
!= VOLUME_UNSPECIFIED
)
2520 NLA_PUT_U32(skb
, T_ctx_volume
, vnr
);
2521 NLA_PUT_STRING(skb
, T_ctx_conn_name
, conn_name
);
2522 nla_nest_end(skb
, nla
);
2527 nla_nest_cancel(skb
, nla
);
2531 int nla_put_status_info(struct sk_buff
*skb
, struct drbd_conf
*mdev
,
2532 const struct sib_info
*sib
)
2534 struct state_info
*si
= NULL
; /* for sizeof(si->member); */
2535 struct net_conf
*nc
;
2539 int exclude_sensitive
;
2541 /* If sib != NULL, this is drbd_bcast_event, which anyone can listen
2542 * to. So we better exclude_sensitive information.
2544 * If sib == NULL, this is drbd_adm_get_status, executed synchronously
2545 * in the context of the requesting user process. Exclude sensitive
2546 * information, unless current has superuser.
2548 * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and
2549 * relies on the current implementation of netlink_dump(), which
2550 * executes the dump callback successively from netlink_recvmsg(),
2551 * always in the context of the receiving process */
2552 exclude_sensitive
= sib
|| !capable(CAP_SYS_ADMIN
);
2554 got_ldev
= get_ldev(mdev
);
2556 /* We need to add connection name and volume number information still.
2557 * Minor number is in drbd_genlmsghdr. */
2558 if (nla_put_drbd_cfg_context(skb
, mdev
->tconn
->name
, mdev
->vnr
))
2559 goto nla_put_failure
;
2561 if (res_opts_to_skb(skb
, &mdev
->tconn
->res_opts
, exclude_sensitive
))
2562 goto nla_put_failure
;
2566 if (disk_conf_to_skb(skb
, rcu_dereference(mdev
->ldev
->disk_conf
), exclude_sensitive
))
2567 goto nla_put_failure
;
2569 nc
= rcu_dereference(mdev
->tconn
->net_conf
);
2571 err
= net_conf_to_skb(skb
, nc
, exclude_sensitive
);
2574 goto nla_put_failure
;
2576 nla
= nla_nest_start(skb
, DRBD_NLA_STATE_INFO
);
2578 goto nla_put_failure
;
2579 NLA_PUT_U32(skb
, T_sib_reason
, sib
? sib
->sib_reason
: SIB_GET_STATUS_REPLY
);
2580 NLA_PUT_U32(skb
, T_current_state
, mdev
->state
.i
);
2581 NLA_PUT_U64(skb
, T_ed_uuid
, mdev
->ed_uuid
);
2582 NLA_PUT_U64(skb
, T_capacity
, drbd_get_capacity(mdev
->this_bdev
));
2585 NLA_PUT_U32(skb
, T_disk_flags
, mdev
->ldev
->md
.flags
);
2586 NLA_PUT(skb
, T_uuids
, sizeof(si
->uuids
), mdev
->ldev
->md
.uuid
);
2587 NLA_PUT_U64(skb
, T_bits_total
, drbd_bm_bits(mdev
));
2588 NLA_PUT_U64(skb
, T_bits_oos
, drbd_bm_total_weight(mdev
));
2589 if (C_SYNC_SOURCE
<= mdev
->state
.conn
&&
2590 C_PAUSED_SYNC_T
>= mdev
->state
.conn
) {
2591 NLA_PUT_U64(skb
, T_bits_rs_total
, mdev
->rs_total
);
2592 NLA_PUT_U64(skb
, T_bits_rs_failed
, mdev
->rs_failed
);
2597 switch(sib
->sib_reason
) {
2598 case SIB_SYNC_PROGRESS
:
2599 case SIB_GET_STATUS_REPLY
:
2601 case SIB_STATE_CHANGE
:
2602 NLA_PUT_U32(skb
, T_prev_state
, sib
->os
.i
);
2603 NLA_PUT_U32(skb
, T_new_state
, sib
->ns
.i
);
2605 case SIB_HELPER_POST
:
2607 T_helper_exit_code
, sib
->helper_exit_code
);
2609 case SIB_HELPER_PRE
:
2610 NLA_PUT_STRING(skb
, T_helper
, sib
->helper_name
);
2614 nla_nest_end(skb
, nla
);
2624 int drbd_adm_get_status(struct sk_buff
*skb
, struct genl_info
*info
)
2626 enum drbd_ret_code retcode
;
2629 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2630 if (!adm_ctx
.reply_skb
)
2632 if (retcode
!= NO_ERROR
)
2635 err
= nla_put_status_info(adm_ctx
.reply_skb
, adm_ctx
.mdev
, NULL
);
2637 nlmsg_free(adm_ctx
.reply_skb
);
2641 drbd_adm_finish(info
, retcode
);
2645 int get_one_status(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2647 struct drbd_conf
*mdev
;
2648 struct drbd_genlmsghdr
*dh
;
2649 struct drbd_tconn
*pos
= (struct drbd_tconn
*)cb
->args
[0];
2650 struct drbd_tconn
*tconn
= NULL
;
2651 struct drbd_tconn
*tmp
;
2652 unsigned volume
= cb
->args
[1];
2654 /* Open coded, deferred, iteration:
2655 * list_for_each_entry_safe(tconn, tmp, &drbd_tconns, all_tconn) {
2656 * idr_for_each_entry(&tconn->volumes, mdev, i) {
2660 * where tconn is cb->args[0];
2661 * and i is cb->args[1];
2663 * cb->args[2] indicates if we shall loop over all resources,
2664 * or just dump all volumes of a single resource.
2666 * This may miss entries inserted after this dump started,
2667 * or entries deleted before they are reached.
2669 * We need to make sure the mdev won't disappear while
2670 * we are looking at it, and revalidate our iterators
2671 * on each iteration.
2674 /* synchronize with conn_create()/conn_destroy() */
2675 down_read(&drbd_cfg_rwsem
);
2676 /* revalidate iterator position */
2677 list_for_each_entry(tmp
, &drbd_tconns
, all_tconn
) {
2679 /* first iteration */
2691 mdev
= idr_get_next(&tconn
->volumes
, &volume
);
2693 /* No more volumes to dump on this tconn.
2694 * Advance tconn iterator. */
2695 pos
= list_entry(tconn
->all_tconn
.next
,
2696 struct drbd_tconn
, all_tconn
);
2697 /* Did we dump any volume on this tconn yet? */
2699 /* If we reached the end of the list,
2700 * or only a single resource dump was requested,
2702 if (&pos
->all_tconn
== &drbd_tconns
|| cb
->args
[2])
2710 dh
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).pid
,
2711 cb
->nlh
->nlmsg_seq
, &drbd_genl_family
,
2712 NLM_F_MULTI
, DRBD_ADM_GET_STATUS
);
2717 /* this is a tconn without a single volume */
2719 dh
->ret_code
= NO_ERROR
;
2720 if (nla_put_drbd_cfg_context(skb
, tconn
->name
, VOLUME_UNSPECIFIED
))
2721 genlmsg_cancel(skb
, dh
);
2723 genlmsg_end(skb
, dh
);
2727 D_ASSERT(mdev
->vnr
== volume
);
2728 D_ASSERT(mdev
->tconn
== tconn
);
2730 dh
->minor
= mdev_to_minor(mdev
);
2731 dh
->ret_code
= NO_ERROR
;
2733 if (nla_put_status_info(skb
, mdev
, NULL
)) {
2734 genlmsg_cancel(skb
, dh
);
2737 genlmsg_end(skb
, dh
);
2741 up_read(&drbd_cfg_rwsem
);
2742 /* where to start the next iteration */
2743 cb
->args
[0] = (long)pos
;
2744 cb
->args
[1] = (pos
== tconn
) ? volume
+ 1 : 0;
2746 /* No more tconns/volumes/minors found results in an empty skb.
2747 * Which will terminate the dump. */
2752 * Request status of all resources, or of all volumes within a single resource.
2754 * This is a dump, as the answer may not fit in a single reply skb otherwise.
2755 * Which means we cannot use the family->attrbuf or other such members, because
2756 * dump is NOT protected by the genl_lock(). During dump, we only have access
2757 * to the incoming skb, and need to opencode "parsing" of the nlattr payload.
2759 * Once things are setup properly, we call into get_one_status().
2761 int drbd_adm_get_status_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2763 const unsigned hdrlen
= GENL_HDRLEN
+ GENL_MAGIC_FAMILY_HDRSZ
;
2765 const char *conn_name
;
2766 struct drbd_tconn
*tconn
;
2768 /* Is this a followup call? */
2770 /* ... of a single resource dump,
2771 * and the resource iterator has been advanced already? */
2772 if (cb
->args
[2] && cb
->args
[2] != cb
->args
[0])
2773 return 0; /* DONE. */
2777 /* First call (from netlink_dump_start). We need to figure out
2778 * which resource(s) the user wants us to dump. */
2779 nla
= nla_find(nlmsg_attrdata(cb
->nlh
, hdrlen
),
2780 nlmsg_attrlen(cb
->nlh
, hdrlen
),
2781 DRBD_NLA_CFG_CONTEXT
);
2783 /* No explicit context given. Dump all. */
2786 nla
= nla_find_nested(nla
, __nla_type(T_ctx_conn_name
));
2787 /* context given, but no name present? */
2790 conn_name
= nla_data(nla
);
2791 tconn
= conn_get_by_name(conn_name
);
2796 kref_put(&tconn
->kref
, &conn_destroy
); /* get_one_status() (re)validates tconn by itself */
2798 /* prime iterators, and set "filter" mode mark:
2799 * only dump this tconn. */
2800 cb
->args
[0] = (long)tconn
;
2801 /* cb->args[1] = 0; passed in this way. */
2802 cb
->args
[2] = (long)tconn
;
2805 return get_one_status(skb
, cb
);
2808 int drbd_adm_get_timeout_type(struct sk_buff
*skb
, struct genl_info
*info
)
2810 enum drbd_ret_code retcode
;
2811 struct timeout_parms tp
;
2814 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2815 if (!adm_ctx
.reply_skb
)
2817 if (retcode
!= NO_ERROR
)
2821 adm_ctx
.mdev
->state
.pdsk
== D_OUTDATED
? UT_PEER_OUTDATED
:
2822 test_bit(USE_DEGR_WFC_T
, &adm_ctx
.mdev
->flags
) ? UT_DEGRADED
:
2825 err
= timeout_parms_to_priv_skb(adm_ctx
.reply_skb
, &tp
);
2827 nlmsg_free(adm_ctx
.reply_skb
);
2831 drbd_adm_finish(info
, retcode
);
2835 int drbd_adm_start_ov(struct sk_buff
*skb
, struct genl_info
*info
)
2837 struct drbd_conf
*mdev
;
2838 enum drbd_ret_code retcode
;
2840 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2841 if (!adm_ctx
.reply_skb
)
2843 if (retcode
!= NO_ERROR
)
2846 mdev
= adm_ctx
.mdev
;
2847 if (info
->attrs
[DRBD_NLA_START_OV_PARMS
]) {
2848 /* resume from last known position, if possible */
2849 struct start_ov_parms parms
=
2850 { .ov_start_sector
= mdev
->ov_start_sector
};
2851 int err
= start_ov_parms_from_attrs(&parms
, info
);
2853 retcode
= ERR_MANDATORY_TAG
;
2854 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2857 /* w_make_ov_request expects position to be aligned */
2858 mdev
->ov_start_sector
= parms
.ov_start_sector
& ~BM_SECT_PER_BIT
;
2860 /* If there is still bitmap IO pending, e.g. previous resync or verify
2861 * just being finished, wait for it before requesting a new resync. */
2862 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2863 retcode
= drbd_request_state(mdev
,NS(conn
,C_VERIFY_S
));
2865 drbd_adm_finish(info
, retcode
);
2870 int drbd_adm_new_c_uuid(struct sk_buff
*skb
, struct genl_info
*info
)
2872 struct drbd_conf
*mdev
;
2873 enum drbd_ret_code retcode
;
2874 int skip_initial_sync
= 0;
2876 struct new_c_uuid_parms args
;
2878 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
2879 if (!adm_ctx
.reply_skb
)
2881 if (retcode
!= NO_ERROR
)
2884 mdev
= adm_ctx
.mdev
;
2885 memset(&args
, 0, sizeof(args
));
2886 if (info
->attrs
[DRBD_NLA_NEW_C_UUID_PARMS
]) {
2887 err
= new_c_uuid_parms_from_attrs(&args
, info
);
2889 retcode
= ERR_MANDATORY_TAG
;
2890 drbd_msg_put_info(from_attrs_err_to_txt(err
));
2895 mutex_lock(mdev
->state_mutex
); /* Protects us against serialized state changes. */
2897 if (!get_ldev(mdev
)) {
2898 retcode
= ERR_NO_DISK
;
2902 /* this is "skip initial sync", assume to be clean */
2903 if (mdev
->state
.conn
== C_CONNECTED
&& mdev
->tconn
->agreed_pro_version
>= 90 &&
2904 mdev
->ldev
->md
.uuid
[UI_CURRENT
] == UUID_JUST_CREATED
&& args
.clear_bm
) {
2905 dev_info(DEV
, "Preparing to skip initial sync\n");
2906 skip_initial_sync
= 1;
2907 } else if (mdev
->state
.conn
!= C_STANDALONE
) {
2908 retcode
= ERR_CONNECTED
;
2912 drbd_uuid_set(mdev
, UI_BITMAP
, 0); /* Rotate UI_BITMAP to History 1, etc... */
2913 drbd_uuid_new_current(mdev
); /* New current, previous to UI_BITMAP */
2915 if (args
.clear_bm
) {
2916 err
= drbd_bitmap_io(mdev
, &drbd_bmio_clear_n_write
,
2917 "clear_n_write from new_c_uuid", BM_LOCKED_MASK
);
2919 dev_err(DEV
, "Writing bitmap failed with %d\n",err
);
2920 retcode
= ERR_IO_MD_DISK
;
2922 if (skip_initial_sync
) {
2923 drbd_send_uuids_skip_initial_sync(mdev
);
2924 _drbd_uuid_set(mdev
, UI_BITMAP
, 0);
2925 drbd_print_uuids(mdev
, "cleared bitmap UUID");
2926 spin_lock_irq(&mdev
->tconn
->req_lock
);
2927 _drbd_set_state(_NS2(mdev
, disk
, D_UP_TO_DATE
, pdsk
, D_UP_TO_DATE
),
2929 spin_unlock_irq(&mdev
->tconn
->req_lock
);
2937 mutex_unlock(mdev
->state_mutex
);
2939 drbd_adm_finish(info
, retcode
);
2943 static enum drbd_ret_code
2944 drbd_check_conn_name(const char *name
)
2946 if (!name
|| !name
[0]) {
2947 drbd_msg_put_info("connection name missing");
2948 return ERR_MANDATORY_TAG
;
2950 /* if we want to use these in sysfs/configfs/debugfs some day,
2951 * we must not allow slashes */
2952 if (strchr(name
, '/')) {
2953 drbd_msg_put_info("invalid connection name");
2954 return ERR_INVALID_REQUEST
;
2959 int drbd_adm_create_connection(struct sk_buff
*skb
, struct genl_info
*info
)
2961 enum drbd_ret_code retcode
;
2963 retcode
= drbd_adm_prepare(skb
, info
, 0);
2964 if (!adm_ctx
.reply_skb
)
2966 if (retcode
!= NO_ERROR
)
2969 retcode
= drbd_check_conn_name(adm_ctx
.conn_name
);
2970 if (retcode
!= NO_ERROR
)
2973 if (adm_ctx
.tconn
) {
2974 if (info
->nlhdr
->nlmsg_flags
& NLM_F_EXCL
) {
2975 retcode
= ERR_INVALID_REQUEST
;
2976 drbd_msg_put_info("connection exists");
2978 /* else: still NO_ERROR */
2982 if (!conn_create(adm_ctx
.conn_name
))
2983 retcode
= ERR_NOMEM
;
2985 drbd_adm_finish(info
, retcode
);
2989 int drbd_adm_add_minor(struct sk_buff
*skb
, struct genl_info
*info
)
2991 struct drbd_genlmsghdr
*dh
= info
->userhdr
;
2992 enum drbd_ret_code retcode
;
2994 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONN
);
2995 if (!adm_ctx
.reply_skb
)
2997 if (retcode
!= NO_ERROR
)
3000 /* FIXME drop minor_count parameter, limit to MINORMASK */
3001 if (dh
->minor
>= minor_count
) {
3002 drbd_msg_put_info("requested minor out of range");
3003 retcode
= ERR_INVALID_REQUEST
;
3006 if (adm_ctx
.volume
> DRBD_VOLUME_MAX
) {
3007 drbd_msg_put_info("requested volume id out of range");
3008 retcode
= ERR_INVALID_REQUEST
;
3012 /* drbd_adm_prepare made sure already
3013 * that mdev->tconn and mdev->vnr match the request. */
3015 if (info
->nlhdr
->nlmsg_flags
& NLM_F_EXCL
)
3016 retcode
= ERR_MINOR_EXISTS
;
3017 /* else: still NO_ERROR */
3021 down_write(&drbd_cfg_rwsem
);
3022 retcode
= conn_new_minor(adm_ctx
.tconn
, dh
->minor
, adm_ctx
.volume
);
3023 up_write(&drbd_cfg_rwsem
);
3025 drbd_adm_finish(info
, retcode
);
3029 static enum drbd_ret_code
adm_delete_minor(struct drbd_conf
*mdev
)
3031 if (mdev
->state
.disk
== D_DISKLESS
&&
3032 /* no need to be mdev->state.conn == C_STANDALONE &&
3033 * we may want to delete a minor from a live replication group.
3035 mdev
->state
.role
== R_SECONDARY
) {
3036 drbd_delete_device(mdev
);
3039 return ERR_MINOR_CONFIGURED
;
3042 int drbd_adm_delete_minor(struct sk_buff
*skb
, struct genl_info
*info
)
3044 enum drbd_ret_code retcode
;
3046 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_MINOR
);
3047 if (!adm_ctx
.reply_skb
)
3049 if (retcode
!= NO_ERROR
)
3052 down_write(&drbd_cfg_rwsem
);
3053 retcode
= adm_delete_minor(adm_ctx
.mdev
);
3054 up_write(&drbd_cfg_rwsem
);
3056 drbd_adm_finish(info
, retcode
);
3060 int drbd_adm_down(struct sk_buff
*skb
, struct genl_info
*info
)
3062 int retcode
; /* enum drbd_ret_code rsp. enum drbd_state_rv */
3063 struct drbd_conf
*mdev
;
3066 retcode
= drbd_adm_prepare(skb
, info
, 0);
3067 if (!adm_ctx
.reply_skb
)
3069 if (retcode
!= NO_ERROR
)
3072 if (!adm_ctx
.tconn
) {
3073 retcode
= ERR_CONN_NOT_KNOWN
;
3077 down_read(&drbd_cfg_rwsem
);
3079 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3080 retcode
= drbd_set_role(mdev
, R_SECONDARY
, 0);
3081 if (retcode
< SS_SUCCESS
) {
3082 drbd_msg_put_info("failed to demote");
3086 up_read(&drbd_cfg_rwsem
);
3088 /* disconnect; may stop the receiver;
3089 * must not hold the drbd_cfg_rwsem */
3090 retcode
= conn_try_disconnect(adm_ctx
.tconn
, 0);
3091 if (retcode
< SS_SUCCESS
) {
3092 drbd_msg_put_info("failed to disconnect");
3096 down_read(&drbd_cfg_rwsem
);
3098 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3099 retcode
= adm_detach(mdev
);
3100 if (retcode
< SS_SUCCESS
) {
3101 drbd_msg_put_info("failed to detach");
3105 up_read(&drbd_cfg_rwsem
);
3107 /* If we reach this, all volumes (of this tconn) are Secondary,
3108 * Disconnected, Diskless, aka Unconfigured. Make sure all threads have
3109 * actually stopped, state handling only does drbd_thread_stop_nowait().
3110 * This needs to be done without holding drbd_cfg_rwsem. */
3111 drbd_thread_stop(&adm_ctx
.tconn
->worker
);
3113 /* Now, nothing can fail anymore */
3115 /* delete volumes */
3116 down_write(&drbd_cfg_rwsem
);
3117 idr_for_each_entry(&adm_ctx
.tconn
->volumes
, mdev
, i
) {
3118 retcode
= adm_delete_minor(mdev
);
3119 if (retcode
!= NO_ERROR
) {
3120 /* "can not happen" */
3121 drbd_msg_put_info("failed to delete volume");
3122 up_write(&drbd_cfg_rwsem
);
3127 /* delete connection */
3128 if (conn_lowest_minor(adm_ctx
.tconn
) < 0) {
3129 list_del(&adm_ctx
.tconn
->all_tconn
);
3130 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
3134 /* "can not happen" */
3135 retcode
= ERR_CONN_IN_USE
;
3136 drbd_msg_put_info("failed to delete connection");
3138 up_write(&drbd_cfg_rwsem
);
3141 up_read(&drbd_cfg_rwsem
);
3143 drbd_adm_finish(info
, retcode
);
3147 int drbd_adm_delete_connection(struct sk_buff
*skb
, struct genl_info
*info
)
3149 enum drbd_ret_code retcode
;
3151 retcode
= drbd_adm_prepare(skb
, info
, DRBD_ADM_NEED_CONN
);
3152 if (!adm_ctx
.reply_skb
)
3154 if (retcode
!= NO_ERROR
)
3157 down_write(&drbd_cfg_rwsem
);
3158 if (conn_lowest_minor(adm_ctx
.tconn
) < 0) {
3159 list_del(&adm_ctx
.tconn
->all_tconn
);
3160 kref_put(&adm_ctx
.tconn
->kref
, &conn_destroy
);
3164 retcode
= ERR_CONN_IN_USE
;
3166 up_write(&drbd_cfg_rwsem
);
3168 if (retcode
== NO_ERROR
)
3169 drbd_thread_stop(&adm_ctx
.tconn
->worker
);
3171 drbd_adm_finish(info
, retcode
);
3175 void drbd_bcast_event(struct drbd_conf
*mdev
, const struct sib_info
*sib
)
3177 static atomic_t drbd_genl_seq
= ATOMIC_INIT(2); /* two. */
3178 struct sk_buff
*msg
;
3179 struct drbd_genlmsghdr
*d_out
;
3183 seq
= atomic_inc_return(&drbd_genl_seq
);
3184 msg
= genlmsg_new(NLMSG_GOODSIZE
, GFP_NOIO
);
3189 d_out
= genlmsg_put(msg
, 0, seq
, &drbd_genl_family
, 0, DRBD_EVENT
);
3190 if (!d_out
) /* cannot happen, but anyways. */
3191 goto nla_put_failure
;
3192 d_out
->minor
= mdev_to_minor(mdev
);
3193 d_out
->ret_code
= 0;
3195 if (nla_put_status_info(msg
, mdev
, sib
))
3196 goto nla_put_failure
;
3197 genlmsg_end(msg
, d_out
);
3198 err
= drbd_genl_multicast_events(msg
, 0);
3199 /* msg has been consumed or freed in netlink_broadcast() */
3200 if (err
&& err
!= -ESRCH
)
3208 dev_err(DEV
, "Error %d while broadcasting event. "
3209 "Event seq:%u sib_reason:%u\n",
3210 err
, seq
, sib
->sib_reason
);