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/connector.h>
33 #include <linux/blkpg.h>
34 #include <linux/cpumask.h>
37 #include "drbd_wrappers.h"
38 #include <asm/unaligned.h>
39 #include <linux/drbd_tag_magic.h>
40 #include <linux/drbd_limits.h>
41 #include <linux/compiler.h>
42 #include <linux/kthread.h>
44 static unsigned short *tl_add_blob(unsigned short *, enum drbd_tags
, const void *, int);
45 static unsigned short *tl_add_str(unsigned short *, enum drbd_tags
, const char *);
46 static unsigned short *tl_add_int(unsigned short *, enum drbd_tags
, const void *);
48 /* see get_sb_bdev and bd_claim */
49 static char *drbd_m_holder
= "Hands off! this is DRBD's meta data device.";
51 /* Generate the tag_list to struct functions */
52 #define NL_PACKET(name, number, fields) \
53 static int name ## _from_tags(struct drbd_conf *mdev, \
54 unsigned short *tags, struct name *arg) __attribute__ ((unused)); \
55 static int name ## _from_tags(struct drbd_conf *mdev, \
56 unsigned short *tags, struct name *arg) \
61 while ((tag = get_unaligned(tags++)) != TT_END) { \
62 dlen = get_unaligned(tags++); \
63 switch (tag_number(tag)) { \
66 if (tag & T_MANDATORY) { \
67 dev_err(DEV, "Unknown tag: %d\n", tag_number(tag)); \
71 tags = (unsigned short *)((char *)tags + dlen); \
75 #define NL_INTEGER(pn, pr, member) \
76 case pn: /* D_ASSERT( tag_type(tag) == TT_INTEGER ); */ \
77 arg->member = get_unaligned((int *)(tags)); \
79 #define NL_INT64(pn, pr, member) \
80 case pn: /* D_ASSERT( tag_type(tag) == TT_INT64 ); */ \
81 arg->member = get_unaligned((u64 *)(tags)); \
83 #define NL_BIT(pn, pr, member) \
84 case pn: /* D_ASSERT( tag_type(tag) == TT_BIT ); */ \
85 arg->member = *(char *)(tags) ? 1 : 0; \
87 #define NL_STRING(pn, pr, member, len) \
88 case pn: /* D_ASSERT( tag_type(tag) == TT_STRING ); */ \
90 dev_err(DEV, "arg too long: %s (%u wanted, max len: %u bytes)\n", \
91 #member, dlen, (unsigned int)len); \
94 arg->member ## _len = dlen; \
95 memcpy(arg->member, tags, min_t(size_t, dlen, len)); \
97 #include "linux/drbd_nl.h"
99 /* Generate the struct to tag_list functions */
100 #define NL_PACKET(name, number, fields) \
101 static unsigned short* \
102 name ## _to_tags(struct drbd_conf *mdev, \
103 struct name *arg, unsigned short *tags) __attribute__ ((unused)); \
104 static unsigned short* \
105 name ## _to_tags(struct drbd_conf *mdev, \
106 struct name *arg, unsigned short *tags) \
112 #define NL_INTEGER(pn, pr, member) \
113 put_unaligned(pn | pr | TT_INTEGER, tags++); \
114 put_unaligned(sizeof(int), tags++); \
115 put_unaligned(arg->member, (int *)tags); \
116 tags = (unsigned short *)((char *)tags+sizeof(int));
117 #define NL_INT64(pn, pr, member) \
118 put_unaligned(pn | pr | TT_INT64, tags++); \
119 put_unaligned(sizeof(u64), tags++); \
120 put_unaligned(arg->member, (u64 *)tags); \
121 tags = (unsigned short *)((char *)tags+sizeof(u64));
122 #define NL_BIT(pn, pr, member) \
123 put_unaligned(pn | pr | TT_BIT, tags++); \
124 put_unaligned(sizeof(char), tags++); \
125 *(char *)tags = arg->member; \
126 tags = (unsigned short *)((char *)tags+sizeof(char));
127 #define NL_STRING(pn, pr, member, len) \
128 put_unaligned(pn | pr | TT_STRING, tags++); \
129 put_unaligned(arg->member ## _len, tags++); \
130 memcpy(tags, arg->member, arg->member ## _len); \
131 tags = (unsigned short *)((char *)tags + arg->member ## _len);
132 #include "linux/drbd_nl.h"
134 void drbd_bcast_ev_helper(struct drbd_conf
*mdev
, char *helper_name
);
135 void drbd_nl_send_reply(struct cn_msg
*, int);
137 int drbd_khelper(struct drbd_conf
*mdev
, char *cmd
)
139 char *envp
[] = { "HOME=/",
141 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
142 NULL
, /* Will be set to address family */
143 NULL
, /* Will be set to address */
146 char mb
[12], af
[20], ad
[60], *afs
;
147 char *argv
[] = {usermode_helper
, cmd
, mb
, NULL
};
150 snprintf(mb
, 12, "minor-%d", mdev_to_minor(mdev
));
152 if (get_net_conf(mdev
->tconn
)) {
153 switch (((struct sockaddr
*)mdev
->tconn
->net_conf
->peer_addr
)->sa_family
) {
156 snprintf(ad
, 60, "DRBD_PEER_ADDRESS=%pI6",
157 &((struct sockaddr_in6
*)mdev
->tconn
->net_conf
->peer_addr
)->sin6_addr
);
161 snprintf(ad
, 60, "DRBD_PEER_ADDRESS=%pI4",
162 &((struct sockaddr_in
*)mdev
->tconn
->net_conf
->peer_addr
)->sin_addr
);
166 snprintf(ad
, 60, "DRBD_PEER_ADDRESS=%pI4",
167 &((struct sockaddr_in
*)mdev
->tconn
->net_conf
->peer_addr
)->sin_addr
);
169 snprintf(af
, 20, "DRBD_PEER_AF=%s", afs
);
172 put_net_conf(mdev
->tconn
);
175 /* The helper may take some time.
176 * write out any unsynced meta data changes now */
179 dev_info(DEV
, "helper command: %s %s %s\n", usermode_helper
, cmd
, mb
);
181 drbd_bcast_ev_helper(mdev
, cmd
);
182 ret
= call_usermodehelper(usermode_helper
, argv
, envp
, 1);
184 dev_warn(DEV
, "helper command: %s %s %s exit code %u (0x%x)\n",
185 usermode_helper
, cmd
, mb
,
186 (ret
>> 8) & 0xff, ret
);
188 dev_info(DEV
, "helper command: %s %s %s exit code %u (0x%x)\n",
189 usermode_helper
, cmd
, mb
,
190 (ret
>> 8) & 0xff, ret
);
192 if (ret
< 0) /* Ignore any ERRNOs we got. */
198 enum drbd_disk_state
drbd_try_outdate_peer(struct drbd_conf
*mdev
)
202 enum drbd_disk_state nps
;
203 enum drbd_fencing_p fp
;
205 D_ASSERT(mdev
->state
.pdsk
== D_UNKNOWN
);
207 if (get_ldev_if_state(mdev
, D_CONSISTENT
)) {
208 fp
= mdev
->ldev
->dc
.fencing
;
211 dev_warn(DEV
, "Not fencing peer, I'm not even Consistent myself.\n");
212 nps
= mdev
->state
.pdsk
;
216 r
= drbd_khelper(mdev
, "fence-peer");
218 switch ((r
>>8) & 0xff) {
219 case 3: /* peer is inconsistent */
220 ex_to_string
= "peer is inconsistent or worse";
221 nps
= D_INCONSISTENT
;
223 case 4: /* peer got outdated, or was already outdated */
224 ex_to_string
= "peer was fenced";
227 case 5: /* peer was down */
228 if (mdev
->state
.disk
== D_UP_TO_DATE
) {
229 /* we will(have) create(d) a new UUID anyways... */
230 ex_to_string
= "peer is unreachable, assumed to be dead";
233 ex_to_string
= "peer unreachable, doing nothing since disk != UpToDate";
234 nps
= mdev
->state
.pdsk
;
237 case 6: /* Peer is primary, voluntarily outdate myself.
238 * This is useful when an unconnected R_SECONDARY is asked to
239 * become R_PRIMARY, but finds the other peer being active. */
240 ex_to_string
= "peer is active";
241 dev_warn(DEV
, "Peer is primary, outdating myself.\n");
243 _drbd_request_state(mdev
, NS(disk
, D_OUTDATED
), CS_WAIT_COMPLETE
);
246 if (fp
!= FP_STONITH
)
247 dev_err(DEV
, "fence-peer() = 7 && fencing != Stonith !!!\n");
248 ex_to_string
= "peer was stonithed";
252 /* The script is broken ... */
254 dev_err(DEV
, "fence-peer helper broken, returned %d\n", (r
>>8)&0xff);
258 dev_info(DEV
, "fence-peer helper returned %d (%s)\n",
259 (r
>>8) & 0xff, ex_to_string
);
262 if (mdev
->state
.susp_fen
&& nps
>= D_UNKNOWN
) {
263 /* The handler was not successful... unfreeze here, the
264 state engine can not unfreeze... */
265 _drbd_request_state(mdev
, NS(susp_fen
, 0), CS_VERBOSE
);
271 static int _try_outdate_peer_async(void *data
)
273 struct drbd_conf
*mdev
= (struct drbd_conf
*)data
;
274 enum drbd_disk_state nps
;
277 nps
= drbd_try_outdate_peer(mdev
);
280 drbd_request_state(mdev, NS(pdsk, nps));
281 here, because we might were able to re-establish the connection
282 in the meantime. This can only partially be solved in the state's
283 engine is_valid_state() and is_valid_state_transition()
286 nps can be D_INCONSISTENT, D_OUTDATED or D_UNKNOWN.
287 pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid,
288 therefore we have to have the pre state change check here.
290 spin_lock_irq(&mdev
->tconn
->req_lock
);
292 if (ns
.conn
< C_WF_REPORT_PARAMS
) {
294 _drbd_set_state(mdev
, ns
, CS_VERBOSE
, NULL
);
296 spin_unlock_irq(&mdev
->tconn
->req_lock
);
301 void drbd_try_outdate_peer_async(struct drbd_conf
*mdev
)
303 struct task_struct
*opa
;
305 opa
= kthread_run(_try_outdate_peer_async
, mdev
, "drbd%d_a_helper", mdev_to_minor(mdev
));
307 dev_err(DEV
, "out of mem, failed to invoke fence-peer helper\n");
311 drbd_set_role(struct drbd_conf
*mdev
, enum drbd_role new_role
, int force
)
313 const int max_tries
= 4;
314 enum drbd_state_rv rv
= SS_UNKNOWN_ERROR
;
317 union drbd_state mask
, val
;
318 enum drbd_disk_state nps
;
320 if (new_role
== R_PRIMARY
)
321 request_ping(mdev
->tconn
); /* Detect a dead peer ASAP */
323 mutex_lock(&mdev
->state_mutex
);
325 mask
.i
= 0; mask
.role
= R_MASK
;
326 val
.i
= 0; val
.role
= new_role
;
328 while (try++ < max_tries
) {
329 rv
= _drbd_request_state(mdev
, mask
, val
, CS_WAIT_COMPLETE
);
331 /* in case we first succeeded to outdate,
332 * but now suddenly could establish a connection */
333 if (rv
== SS_CW_FAILED_BY_PEER
&& mask
.pdsk
!= 0) {
339 if (rv
== SS_NO_UP_TO_DATE_DISK
&& force
&&
340 (mdev
->state
.disk
< D_UP_TO_DATE
&&
341 mdev
->state
.disk
>= D_INCONSISTENT
)) {
343 val
.disk
= D_UP_TO_DATE
;
348 if (rv
== SS_NO_UP_TO_DATE_DISK
&&
349 mdev
->state
.disk
== D_CONSISTENT
&& mask
.pdsk
== 0) {
350 D_ASSERT(mdev
->state
.pdsk
== D_UNKNOWN
);
351 nps
= drbd_try_outdate_peer(mdev
);
353 if (nps
== D_OUTDATED
|| nps
== D_INCONSISTENT
) {
354 val
.disk
= D_UP_TO_DATE
;
364 if (rv
== SS_NOTHING_TO_DO
)
366 if (rv
== SS_PRIMARY_NOP
&& mask
.pdsk
== 0) {
367 nps
= drbd_try_outdate_peer(mdev
);
369 if (force
&& nps
> D_OUTDATED
) {
370 dev_warn(DEV
, "Forced into split brain situation!\n");
379 if (rv
== SS_TWO_PRIMARIES
) {
380 /* Maybe the peer is detected as dead very soon...
381 retry at most once more in this case. */
382 schedule_timeout_interruptible((mdev
->tconn
->net_conf
->ping_timeo
+1)*HZ
/10);
387 if (rv
< SS_SUCCESS
) {
388 rv
= _drbd_request_state(mdev
, mask
, val
,
389 CS_VERBOSE
+ CS_WAIT_COMPLETE
);
400 dev_warn(DEV
, "Forced to consider local data as UpToDate!\n");
402 /* Wait until nothing is on the fly :) */
403 wait_event(mdev
->misc_wait
, atomic_read(&mdev
->ap_pending_cnt
) == 0);
405 if (new_role
== R_SECONDARY
) {
406 set_disk_ro(mdev
->vdisk
, true);
407 if (get_ldev(mdev
)) {
408 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
412 if (get_net_conf(mdev
->tconn
)) {
413 mdev
->tconn
->net_conf
->want_lose
= 0;
414 put_net_conf(mdev
->tconn
);
416 set_disk_ro(mdev
->vdisk
, false);
417 if (get_ldev(mdev
)) {
418 if (((mdev
->state
.conn
< C_CONNECTED
||
419 mdev
->state
.pdsk
<= D_FAILED
)
420 && mdev
->ldev
->md
.uuid
[UI_BITMAP
] == 0) || forced
)
421 drbd_uuid_new_current(mdev
);
423 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
428 /* writeout of activity log covered areas of the bitmap
429 * to stable storage done in after state change already */
431 if (mdev
->state
.conn
>= C_WF_REPORT_PARAMS
) {
432 /* if this was forced, we should consider sync */
434 drbd_send_uuids(mdev
);
435 drbd_send_state(mdev
);
440 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
442 mutex_unlock(&mdev
->state_mutex
);
446 static struct drbd_conf
*ensure_mdev(int minor
, int create
)
448 struct drbd_conf
*mdev
;
450 if (minor
>= minor_count
)
453 mdev
= minor_to_mdev(minor
);
455 if (!mdev
&& create
) {
456 struct gendisk
*disk
= NULL
;
457 mdev
= drbd_new_device(minor
);
459 spin_lock_irq(&drbd_pp_lock
);
460 if (minor_table
[minor
] == NULL
) {
461 minor_table
[minor
] = mdev
;
464 } /* else: we lost the race */
465 spin_unlock_irq(&drbd_pp_lock
);
467 if (disk
) /* we won the race above */
468 /* in case we ever add a drbd_delete_device(),
469 * don't forget the del_gendisk! */
471 else /* we lost the race above */
472 drbd_free_mdev(mdev
);
474 mdev
= minor_to_mdev(minor
);
480 static int drbd_nl_primary(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
481 struct drbd_nl_cfg_reply
*reply
)
483 struct primary primary_args
;
485 memset(&primary_args
, 0, sizeof(struct primary
));
486 if (!primary_from_tags(mdev
, nlp
->tag_list
, &primary_args
)) {
487 reply
->ret_code
= ERR_MANDATORY_TAG
;
492 drbd_set_role(mdev
, R_PRIMARY
, primary_args
.primary_force
);
497 static int drbd_nl_secondary(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
498 struct drbd_nl_cfg_reply
*reply
)
500 reply
->ret_code
= drbd_set_role(mdev
, R_SECONDARY
, 0);
505 /* initializes the md.*_offset members, so we are able to find
506 * the on disk meta data */
507 static void drbd_md_set_sector_offsets(struct drbd_conf
*mdev
,
508 struct drbd_backing_dev
*bdev
)
510 sector_t md_size_sect
= 0;
511 switch (bdev
->dc
.meta_dev_idx
) {
513 /* v07 style fixed size indexed meta data */
514 bdev
->md
.md_size_sect
= MD_RESERVED_SECT
;
515 bdev
->md
.md_offset
= drbd_md_ss__(mdev
, bdev
);
516 bdev
->md
.al_offset
= MD_AL_OFFSET
;
517 bdev
->md
.bm_offset
= MD_BM_OFFSET
;
519 case DRBD_MD_INDEX_FLEX_EXT
:
520 /* just occupy the full device; unit: sectors */
521 bdev
->md
.md_size_sect
= drbd_get_capacity(bdev
->md_bdev
);
522 bdev
->md
.md_offset
= 0;
523 bdev
->md
.al_offset
= MD_AL_OFFSET
;
524 bdev
->md
.bm_offset
= MD_BM_OFFSET
;
526 case DRBD_MD_INDEX_INTERNAL
:
527 case DRBD_MD_INDEX_FLEX_INT
:
528 bdev
->md
.md_offset
= drbd_md_ss__(mdev
, bdev
);
529 /* al size is still fixed */
530 bdev
->md
.al_offset
= -MD_AL_MAX_SIZE
;
531 /* we need (slightly less than) ~ this much bitmap sectors: */
532 md_size_sect
= drbd_get_capacity(bdev
->backing_bdev
);
533 md_size_sect
= ALIGN(md_size_sect
, BM_SECT_PER_EXT
);
534 md_size_sect
= BM_SECT_TO_EXT(md_size_sect
);
535 md_size_sect
= ALIGN(md_size_sect
, 8);
537 /* plus the "drbd meta data super block",
538 * and the activity log; */
539 md_size_sect
+= MD_BM_OFFSET
;
541 bdev
->md
.md_size_sect
= md_size_sect
;
542 /* bitmap offset is adjusted by 'super' block size */
543 bdev
->md
.bm_offset
= -md_size_sect
+ MD_AL_OFFSET
;
548 /* input size is expected to be in KB */
549 char *ppsize(char *buf
, unsigned long long size
)
551 /* Needs 9 bytes at max including trailing NUL:
552 * -1ULL ==> "16384 EB" */
553 static char units
[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
555 while (size
>= 10000 && base
< sizeof(units
)-1) {
557 size
= (size
>> 10) + !!(size
& (1<<9));
560 sprintf(buf
, "%u %cB", (unsigned)size
, units
[base
]);
565 /* there is still a theoretical deadlock when called from receiver
566 * on an D_INCONSISTENT R_PRIMARY:
567 * remote READ does inc_ap_bio, receiver would need to receive answer
568 * packet from remote to dec_ap_bio again.
569 * receiver receive_sizes(), comes here,
570 * waits for ap_bio_cnt == 0. -> deadlock.
571 * but this cannot happen, actually, because:
572 * R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable
573 * (not connected, or bad/no disk on peer):
574 * see drbd_fail_request_early, ap_bio_cnt is zero.
575 * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET:
576 * peer may not initiate a resize.
578 void drbd_suspend_io(struct drbd_conf
*mdev
)
580 set_bit(SUSPEND_IO
, &mdev
->flags
);
581 if (is_susp(mdev
->state
))
583 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_bio_cnt
));
586 void drbd_resume_io(struct drbd_conf
*mdev
)
588 clear_bit(SUSPEND_IO
, &mdev
->flags
);
589 wake_up(&mdev
->misc_wait
);
593 * drbd_determine_dev_size() - Sets the right device size obeying all constraints
594 * @mdev: DRBD device.
596 * Returns 0 on success, negative return values indicate errors.
597 * You should call drbd_md_sync() after calling this function.
599 enum determine_dev_size
drbd_determine_dev_size(struct drbd_conf
*mdev
, enum dds_flags flags
) __must_hold(local
)
601 sector_t prev_first_sect
, prev_size
; /* previous meta location */
606 int md_moved
, la_size_changed
;
607 enum determine_dev_size rv
= unchanged
;
610 * application request passes inc_ap_bio,
611 * but then cannot get an AL-reference.
612 * this function later may wait on ap_bio_cnt == 0. -> deadlock.
615 * Suspend IO right here.
616 * still lock the act_log to not trigger ASSERTs there.
618 drbd_suspend_io(mdev
);
620 /* no wait necessary anymore, actually we could assert that */
621 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
623 prev_first_sect
= drbd_md_first_sector(mdev
->ldev
);
624 prev_size
= mdev
->ldev
->md
.md_size_sect
;
625 la_size
= mdev
->ldev
->md
.la_size_sect
;
627 /* TODO: should only be some assert here, not (re)init... */
628 drbd_md_set_sector_offsets(mdev
, mdev
->ldev
);
630 size
= drbd_new_dev_size(mdev
, mdev
->ldev
, flags
& DDSF_FORCED
);
632 if (drbd_get_capacity(mdev
->this_bdev
) != size
||
633 drbd_bm_capacity(mdev
) != size
) {
635 err
= drbd_bm_resize(mdev
, size
, !(flags
& DDSF_NO_RESYNC
));
637 /* currently there is only one error: ENOMEM! */
638 size
= drbd_bm_capacity(mdev
)>>1;
640 dev_err(DEV
, "OUT OF MEMORY! "
641 "Could not allocate bitmap!\n");
643 dev_err(DEV
, "BM resizing failed. "
644 "Leaving size unchanged at size = %lu KB\n",
645 (unsigned long)size
);
649 /* racy, see comments above. */
650 drbd_set_my_capacity(mdev
, size
);
651 mdev
->ldev
->md
.la_size_sect
= size
;
652 dev_info(DEV
, "size = %s (%llu KB)\n", ppsize(ppb
, size
>>1),
653 (unsigned long long)size
>>1);
655 if (rv
== dev_size_error
)
658 la_size_changed
= (la_size
!= mdev
->ldev
->md
.la_size_sect
);
660 md_moved
= prev_first_sect
!= drbd_md_first_sector(mdev
->ldev
)
661 || prev_size
!= mdev
->ldev
->md
.md_size_sect
;
663 if (la_size_changed
|| md_moved
) {
666 drbd_al_shrink(mdev
); /* All extents inactive. */
667 dev_info(DEV
, "Writing the whole bitmap, %s\n",
668 la_size_changed
&& md_moved
? "size changed and md moved" :
669 la_size_changed
? "size changed" : "md moved");
670 /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
671 err
= drbd_bitmap_io(mdev
, &drbd_bm_write
,
672 "size changed", BM_LOCKED_MASK
);
677 drbd_md_mark_dirty(mdev
);
685 lc_unlock(mdev
->act_log
);
686 wake_up(&mdev
->al_wait
);
687 drbd_resume_io(mdev
);
693 drbd_new_dev_size(struct drbd_conf
*mdev
, struct drbd_backing_dev
*bdev
, int assume_peer_has_space
)
695 sector_t p_size
= mdev
->p_size
; /* partner's disk size. */
696 sector_t la_size
= bdev
->md
.la_size_sect
; /* last agreed size. */
697 sector_t m_size
; /* my size */
698 sector_t u_size
= bdev
->dc
.disk_size
; /* size requested by user. */
701 m_size
= drbd_get_max_capacity(bdev
);
703 if (mdev
->state
.conn
< C_CONNECTED
&& assume_peer_has_space
) {
704 dev_warn(DEV
, "Resize while not connected was forced by the user!\n");
708 if (p_size
&& m_size
) {
709 size
= min_t(sector_t
, p_size
, m_size
);
713 if (m_size
&& m_size
< size
)
715 if (p_size
&& p_size
< size
)
726 dev_err(DEV
, "Both nodes diskless!\n");
730 dev_err(DEV
, "Requested disk size is too big (%lu > %lu)\n",
731 (unsigned long)u_size
>>1, (unsigned long)size
>>1);
740 * drbd_check_al_size() - Ensures that the AL is of the right size
741 * @mdev: DRBD device.
743 * Returns -EBUSY if current al lru is still used, -ENOMEM when allocation
744 * failed, and 0 on success. You should call drbd_md_sync() after you called
747 static int drbd_check_al_size(struct drbd_conf
*mdev
)
749 struct lru_cache
*n
, *t
;
750 struct lc_element
*e
;
754 if (!expect(mdev
->sync_conf
.al_extents
>= 7))
755 mdev
->sync_conf
.al_extents
= 127;
758 mdev
->act_log
->nr_elements
== mdev
->sync_conf
.al_extents
)
763 n
= lc_create("act_log", drbd_al_ext_cache
,
764 mdev
->sync_conf
.al_extents
, sizeof(struct lc_element
), 0);
767 dev_err(DEV
, "Cannot allocate act_log lru!\n");
770 spin_lock_irq(&mdev
->al_lock
);
772 for (i
= 0; i
< t
->nr_elements
; i
++) {
773 e
= lc_element_by_index(t
, i
);
775 dev_err(DEV
, "refcnt(%d)==%d\n",
776 e
->lc_number
, e
->refcnt
);
782 spin_unlock_irq(&mdev
->al_lock
);
784 dev_err(DEV
, "Activity log still in use!\n");
791 drbd_md_mark_dirty(mdev
); /* we changed mdev->act_log->nr_elemens */
795 static void drbd_setup_queue_param(struct drbd_conf
*mdev
, unsigned int max_bio_size
)
797 struct request_queue
* const q
= mdev
->rq_queue
;
798 int max_hw_sectors
= max_bio_size
>> 9;
799 int max_segments
= 0;
801 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
802 struct request_queue
* const b
= mdev
->ldev
->backing_bdev
->bd_disk
->queue
;
804 max_hw_sectors
= min(queue_max_hw_sectors(b
), max_bio_size
>> 9);
805 max_segments
= mdev
->ldev
->dc
.max_bio_bvecs
;
809 blk_queue_logical_block_size(q
, 512);
810 blk_queue_max_hw_sectors(q
, max_hw_sectors
);
811 /* This is the workaround for "bio would need to, but cannot, be split" */
812 blk_queue_max_segments(q
, max_segments
? max_segments
: BLK_MAX_SEGMENTS
);
813 blk_queue_segment_boundary(q
, PAGE_CACHE_SIZE
-1);
815 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
816 struct request_queue
* const b
= mdev
->ldev
->backing_bdev
->bd_disk
->queue
;
818 blk_queue_stack_limits(q
, b
);
820 if (q
->backing_dev_info
.ra_pages
!= b
->backing_dev_info
.ra_pages
) {
821 dev_info(DEV
, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
822 q
->backing_dev_info
.ra_pages
,
823 b
->backing_dev_info
.ra_pages
);
824 q
->backing_dev_info
.ra_pages
= b
->backing_dev_info
.ra_pages
;
830 void drbd_reconsider_max_bio_size(struct drbd_conf
*mdev
)
832 int now
, new, local
, peer
;
834 now
= queue_max_hw_sectors(mdev
->rq_queue
) << 9;
835 local
= mdev
->local_max_bio_size
; /* Eventually last known value, from volatile memory */
836 peer
= mdev
->peer_max_bio_size
; /* Eventually last known value, from meta data */
838 if (get_ldev_if_state(mdev
, D_ATTACHING
)) {
839 local
= queue_max_hw_sectors(mdev
->ldev
->backing_bdev
->bd_disk
->queue
) << 9;
840 mdev
->local_max_bio_size
= local
;
844 /* We may ignore peer limits if the peer is modern enough.
845 Because new from 8.3.8 onwards the peer can use multiple
846 BIOs for a single peer_request */
847 if (mdev
->state
.conn
>= C_CONNECTED
) {
848 if (mdev
->tconn
->agreed_pro_version
< 94)
849 peer
= mdev
->peer_max_bio_size
;
850 else if (mdev
->tconn
->agreed_pro_version
== 94)
851 peer
= DRBD_MAX_SIZE_H80_PACKET
;
852 else /* drbd 8.3.8 onwards */
853 peer
= DRBD_MAX_BIO_SIZE
;
856 new = min_t(int, local
, peer
);
858 if (mdev
->state
.role
== R_PRIMARY
&& new < now
)
859 dev_err(DEV
, "ASSERT FAILED new < now; (%d < %d)\n", new, now
);
862 dev_info(DEV
, "max BIO size = %u\n", new);
864 drbd_setup_queue_param(mdev
, new);
867 /* serialize deconfig (worker exiting, doing cleanup)
868 * and reconfig (drbdsetup disk, drbdsetup net)
870 * Wait for a potentially exiting worker, then restart it,
871 * or start a new one. Flush any pending work, there may still be an
872 * after_state_change queued.
874 static void drbd_reconfig_start(struct drbd_conf
*mdev
)
876 wait_event(mdev
->state_wait
, !test_and_set_bit(CONFIG_PENDING
, &mdev
->flags
));
877 wait_event(mdev
->state_wait
, !test_bit(DEVICE_DYING
, &mdev
->flags
));
878 drbd_thread_start(&mdev
->tconn
->worker
);
879 drbd_flush_workqueue(mdev
);
882 /* if still unconfigured, stops worker again.
883 * if configured now, clears CONFIG_PENDING.
884 * wakes potential waiters */
885 static void drbd_reconfig_done(struct drbd_conf
*mdev
)
887 spin_lock_irq(&mdev
->tconn
->req_lock
);
888 if (mdev
->state
.disk
== D_DISKLESS
&&
889 mdev
->state
.conn
== C_STANDALONE
&&
890 mdev
->state
.role
== R_SECONDARY
) {
891 set_bit(DEVICE_DYING
, &mdev
->flags
);
892 drbd_thread_stop_nowait(&mdev
->tconn
->worker
);
894 clear_bit(CONFIG_PENDING
, &mdev
->flags
);
895 spin_unlock_irq(&mdev
->tconn
->req_lock
);
896 wake_up(&mdev
->state_wait
);
899 /* Make sure IO is suspended before calling this function(). */
900 static void drbd_suspend_al(struct drbd_conf
*mdev
)
904 if (lc_try_lock(mdev
->act_log
)) {
905 drbd_al_shrink(mdev
);
906 lc_unlock(mdev
->act_log
);
908 dev_warn(DEV
, "Failed to lock al in drbd_suspend_al()\n");
912 spin_lock_irq(&mdev
->tconn
->req_lock
);
913 if (mdev
->state
.conn
< C_CONNECTED
)
914 s
= !test_and_set_bit(AL_SUSPENDED
, &mdev
->flags
);
916 spin_unlock_irq(&mdev
->tconn
->req_lock
);
919 dev_info(DEV
, "Suspended AL updates\n");
922 /* does always return 0;
923 * interesting return code is in reply->ret_code */
924 static int drbd_nl_disk_conf(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
925 struct drbd_nl_cfg_reply
*reply
)
927 enum drbd_ret_code retcode
;
928 enum determine_dev_size dd
;
929 sector_t max_possible_sectors
;
930 sector_t min_md_device_sectors
;
931 struct drbd_backing_dev
*nbc
= NULL
; /* new_backing_conf */
932 struct block_device
*bdev
;
933 struct lru_cache
*resync_lru
= NULL
;
934 union drbd_state ns
, os
;
935 enum drbd_state_rv rv
;
936 int cp_discovered
= 0;
937 int logical_block_size
;
939 drbd_reconfig_start(mdev
);
941 /* if you want to reconfigure, please tear down first */
942 if (mdev
->state
.disk
> D_DISKLESS
) {
943 retcode
= ERR_DISK_CONFIGURED
;
946 /* It may just now have detached because of IO error. Make sure
947 * drbd_ldev_destroy is done already, we may end up here very fast,
948 * e.g. if someone calls attach from the on-io-error handler,
949 * to realize a "hot spare" feature (not that I'd recommend that) */
950 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->local_cnt
));
952 /* allocation not in the IO path, cqueue thread context */
953 nbc
= kzalloc(sizeof(struct drbd_backing_dev
), GFP_KERNEL
);
959 nbc
->dc
.disk_size
= DRBD_DISK_SIZE_SECT_DEF
;
960 nbc
->dc
.on_io_error
= DRBD_ON_IO_ERROR_DEF
;
961 nbc
->dc
.fencing
= DRBD_FENCING_DEF
;
962 nbc
->dc
.max_bio_bvecs
= DRBD_MAX_BIO_BVECS_DEF
;
964 if (!disk_conf_from_tags(mdev
, nlp
->tag_list
, &nbc
->dc
)) {
965 retcode
= ERR_MANDATORY_TAG
;
969 if (nbc
->dc
.meta_dev_idx
< DRBD_MD_INDEX_FLEX_INT
) {
970 retcode
= ERR_MD_IDX_INVALID
;
974 if (get_net_conf(mdev
->tconn
)) {
975 int prot
= mdev
->tconn
->net_conf
->wire_protocol
;
976 put_net_conf(mdev
->tconn
);
977 if (nbc
->dc
.fencing
== FP_STONITH
&& prot
== DRBD_PROT_A
) {
978 retcode
= ERR_STONITH_AND_PROT_A
;
983 bdev
= blkdev_get_by_path(nbc
->dc
.backing_dev
,
984 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
, mdev
);
986 dev_err(DEV
, "open(\"%s\") failed with %ld\n", nbc
->dc
.backing_dev
,
988 retcode
= ERR_OPEN_DISK
;
991 nbc
->backing_bdev
= bdev
;
994 * meta_dev_idx >= 0: external fixed size, possibly multiple
995 * drbd sharing one meta device. TODO in that case, paranoia
996 * check that [md_bdev, meta_dev_idx] is not yet used by some
997 * other drbd minor! (if you use drbd.conf + drbdadm, that
998 * should check it for you already; but if you don't, or
999 * someone fooled it, we need to double check here)
1001 bdev
= blkdev_get_by_path(nbc
->dc
.meta_dev
,
1002 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
,
1003 (nbc
->dc
.meta_dev_idx
< 0) ?
1004 (void *)mdev
: (void *)drbd_m_holder
);
1006 dev_err(DEV
, "open(\"%s\") failed with %ld\n", nbc
->dc
.meta_dev
,
1008 retcode
= ERR_OPEN_MD_DISK
;
1011 nbc
->md_bdev
= bdev
;
1013 if ((nbc
->backing_bdev
== nbc
->md_bdev
) !=
1014 (nbc
->dc
.meta_dev_idx
== DRBD_MD_INDEX_INTERNAL
||
1015 nbc
->dc
.meta_dev_idx
== DRBD_MD_INDEX_FLEX_INT
)) {
1016 retcode
= ERR_MD_IDX_INVALID
;
1020 resync_lru
= lc_create("resync", drbd_bm_ext_cache
,
1021 61, sizeof(struct bm_extent
),
1022 offsetof(struct bm_extent
, lce
));
1024 retcode
= ERR_NOMEM
;
1028 /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */
1029 drbd_md_set_sector_offsets(mdev
, nbc
);
1031 if (drbd_get_max_capacity(nbc
) < nbc
->dc
.disk_size
) {
1032 dev_err(DEV
, "max capacity %llu smaller than disk size %llu\n",
1033 (unsigned long long) drbd_get_max_capacity(nbc
),
1034 (unsigned long long) nbc
->dc
.disk_size
);
1035 retcode
= ERR_DISK_TO_SMALL
;
1039 if (nbc
->dc
.meta_dev_idx
< 0) {
1040 max_possible_sectors
= DRBD_MAX_SECTORS_FLEX
;
1041 /* at least one MB, otherwise it does not make sense */
1042 min_md_device_sectors
= (2<<10);
1044 max_possible_sectors
= DRBD_MAX_SECTORS
;
1045 min_md_device_sectors
= MD_RESERVED_SECT
* (nbc
->dc
.meta_dev_idx
+ 1);
1048 if (drbd_get_capacity(nbc
->md_bdev
) < min_md_device_sectors
) {
1049 retcode
= ERR_MD_DISK_TO_SMALL
;
1050 dev_warn(DEV
, "refusing attach: md-device too small, "
1051 "at least %llu sectors needed for this meta-disk type\n",
1052 (unsigned long long) min_md_device_sectors
);
1056 /* Make sure the new disk is big enough
1057 * (we may currently be R_PRIMARY with no local disk...) */
1058 if (drbd_get_max_capacity(nbc
) <
1059 drbd_get_capacity(mdev
->this_bdev
)) {
1060 retcode
= ERR_DISK_TO_SMALL
;
1064 nbc
->known_size
= drbd_get_capacity(nbc
->backing_bdev
);
1066 if (nbc
->known_size
> max_possible_sectors
) {
1067 dev_warn(DEV
, "==> truncating very big lower level device "
1068 "to currently maximum possible %llu sectors <==\n",
1069 (unsigned long long) max_possible_sectors
);
1070 if (nbc
->dc
.meta_dev_idx
>= 0)
1071 dev_warn(DEV
, "==>> using internal or flexible "
1072 "meta data may help <<==\n");
1075 drbd_suspend_io(mdev
);
1076 /* also wait for the last barrier ack. */
1077 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_pending_cnt
) || is_susp(mdev
->state
));
1078 /* and for any other previously queued work */
1079 drbd_flush_workqueue(mdev
);
1081 rv
= _drbd_request_state(mdev
, NS(disk
, D_ATTACHING
), CS_VERBOSE
);
1082 retcode
= rv
; /* FIXME: Type mismatch. */
1083 drbd_resume_io(mdev
);
1084 if (rv
< SS_SUCCESS
)
1087 if (!get_ldev_if_state(mdev
, D_ATTACHING
))
1088 goto force_diskless
;
1090 drbd_md_set_sector_offsets(mdev
, nbc
);
1092 /* allocate a second IO page if logical_block_size != 512 */
1093 logical_block_size
= bdev_logical_block_size(nbc
->md_bdev
);
1094 if (logical_block_size
== 0)
1095 logical_block_size
= MD_SECTOR_SIZE
;
1097 if (logical_block_size
!= MD_SECTOR_SIZE
) {
1098 if (!mdev
->md_io_tmpp
) {
1099 struct page
*page
= alloc_page(GFP_NOIO
);
1101 goto force_diskless_dec
;
1103 dev_warn(DEV
, "Meta data's bdev logical_block_size = %d != %d\n",
1104 logical_block_size
, MD_SECTOR_SIZE
);
1105 dev_warn(DEV
, "Workaround engaged (has performance impact).\n");
1107 mdev
->md_io_tmpp
= page
;
1111 if (!mdev
->bitmap
) {
1112 if (drbd_bm_init(mdev
)) {
1113 retcode
= ERR_NOMEM
;
1114 goto force_diskless_dec
;
1118 retcode
= drbd_md_read(mdev
, nbc
);
1119 if (retcode
!= NO_ERROR
)
1120 goto force_diskless_dec
;
1122 if (mdev
->state
.conn
< C_CONNECTED
&&
1123 mdev
->state
.role
== R_PRIMARY
&&
1124 (mdev
->ed_uuid
& ~((u64
)1)) != (nbc
->md
.uuid
[UI_CURRENT
] & ~((u64
)1))) {
1125 dev_err(DEV
, "Can only attach to data with current UUID=%016llX\n",
1126 (unsigned long long)mdev
->ed_uuid
);
1127 retcode
= ERR_DATA_NOT_CURRENT
;
1128 goto force_diskless_dec
;
1131 /* Since we are diskless, fix the activity log first... */
1132 if (drbd_check_al_size(mdev
)) {
1133 retcode
= ERR_NOMEM
;
1134 goto force_diskless_dec
;
1137 /* Prevent shrinking of consistent devices ! */
1138 if (drbd_md_test_flag(nbc
, MDF_CONSISTENT
) &&
1139 drbd_new_dev_size(mdev
, nbc
, 0) < nbc
->md
.la_size_sect
) {
1140 dev_warn(DEV
, "refusing to truncate a consistent device\n");
1141 retcode
= ERR_DISK_TO_SMALL
;
1142 goto force_diskless_dec
;
1145 if (!drbd_al_read_log(mdev
, nbc
)) {
1146 retcode
= ERR_IO_MD_DISK
;
1147 goto force_diskless_dec
;
1150 /* Reset the "barriers don't work" bits here, then force meta data to
1151 * be written, to ensure we determine if barriers are supported. */
1152 if (nbc
->dc
.no_md_flush
)
1153 set_bit(MD_NO_FUA
, &mdev
->flags
);
1155 clear_bit(MD_NO_FUA
, &mdev
->flags
);
1157 /* Point of no return reached.
1158 * Devices and memory are no longer released by error cleanup below.
1159 * now mdev takes over responsibility, and the state engine should
1160 * clean it up somewhere. */
1161 D_ASSERT(mdev
->ldev
== NULL
);
1163 mdev
->resync
= resync_lru
;
1167 mdev
->write_ordering
= WO_bdev_flush
;
1168 drbd_bump_write_ordering(mdev
, WO_bdev_flush
);
1170 if (drbd_md_test_flag(mdev
->ldev
, MDF_CRASHED_PRIMARY
))
1171 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1173 clear_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1175 if (drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1176 !(mdev
->state
.role
== R_PRIMARY
&& mdev
->state
.susp_nod
)) {
1177 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1186 drbd_reconsider_max_bio_size(mdev
);
1188 /* If I am currently not R_PRIMARY,
1189 * but meta data primary indicator is set,
1190 * I just now recover from a hard crash,
1191 * and have been R_PRIMARY before that crash.
1193 * Now, if I had no connection before that crash
1194 * (have been degraded R_PRIMARY), chances are that
1195 * I won't find my peer now either.
1197 * In that case, and _only_ in that case,
1198 * we use the degr-wfc-timeout instead of the default,
1199 * so we can automatically recover from a crash of a
1200 * degraded but active "cluster" after a certain timeout.
1202 clear_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1203 if (mdev
->state
.role
!= R_PRIMARY
&&
1204 drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1205 !drbd_md_test_flag(mdev
->ldev
, MDF_CONNECTED_IND
))
1206 set_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1208 dd
= drbd_determine_dev_size(mdev
, 0);
1209 if (dd
== dev_size_error
) {
1210 retcode
= ERR_NOMEM_BITMAP
;
1211 goto force_diskless_dec
;
1212 } else if (dd
== grew
)
1213 set_bit(RESYNC_AFTER_NEG
, &mdev
->flags
);
1215 if (drbd_md_test_flag(mdev
->ldev
, MDF_FULL_SYNC
)) {
1216 dev_info(DEV
, "Assuming that all blocks are out of sync "
1217 "(aka FullSync)\n");
1218 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
1219 "set_n_write from attaching", BM_LOCKED_MASK
)) {
1220 retcode
= ERR_IO_MD_DISK
;
1221 goto force_diskless_dec
;
1224 if (drbd_bitmap_io(mdev
, &drbd_bm_read
,
1225 "read from attaching", BM_LOCKED_MASK
) < 0) {
1226 retcode
= ERR_IO_MD_DISK
;
1227 goto force_diskless_dec
;
1231 if (cp_discovered
) {
1232 drbd_al_apply_to_bm(mdev
);
1233 if (drbd_bitmap_io(mdev
, &drbd_bm_write
,
1234 "crashed primary apply AL", BM_LOCKED_MASK
)) {
1235 retcode
= ERR_IO_MD_DISK
;
1236 goto force_diskless_dec
;
1240 if (_drbd_bm_total_weight(mdev
) == drbd_bm_bits(mdev
))
1241 drbd_suspend_al(mdev
); /* IO is still suspended here... */
1243 spin_lock_irq(&mdev
->tconn
->req_lock
);
1246 /* If MDF_CONSISTENT is not set go into inconsistent state,
1247 otherwise investigate MDF_WasUpToDate...
1248 If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
1249 otherwise into D_CONSISTENT state.
1251 if (drbd_md_test_flag(mdev
->ldev
, MDF_CONSISTENT
)) {
1252 if (drbd_md_test_flag(mdev
->ldev
, MDF_WAS_UP_TO_DATE
))
1253 ns
.disk
= D_CONSISTENT
;
1255 ns
.disk
= D_OUTDATED
;
1257 ns
.disk
= D_INCONSISTENT
;
1260 if (drbd_md_test_flag(mdev
->ldev
, MDF_PEER_OUT_DATED
))
1261 ns
.pdsk
= D_OUTDATED
;
1263 if ( ns
.disk
== D_CONSISTENT
&&
1264 (ns
.pdsk
== D_OUTDATED
|| mdev
->ldev
->dc
.fencing
== FP_DONT_CARE
))
1265 ns
.disk
= D_UP_TO_DATE
;
1267 /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
1268 MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
1269 this point, because drbd_request_state() modifies these
1272 /* In case we are C_CONNECTED postpone any decision on the new disk
1273 state after the negotiation phase. */
1274 if (mdev
->state
.conn
== C_CONNECTED
) {
1275 mdev
->new_state_tmp
.i
= ns
.i
;
1277 ns
.disk
= D_NEGOTIATING
;
1279 /* We expect to receive up-to-date UUIDs soon.
1280 To avoid a race in receive_state, free p_uuid while
1281 holding req_lock. I.e. atomic with the state change */
1282 kfree(mdev
->p_uuid
);
1283 mdev
->p_uuid
= NULL
;
1286 rv
= _drbd_set_state(mdev
, ns
, CS_VERBOSE
, NULL
);
1288 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1290 if (rv
< SS_SUCCESS
)
1291 goto force_diskless_dec
;
1293 if (mdev
->state
.role
== R_PRIMARY
)
1294 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
1296 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
1298 drbd_md_mark_dirty(mdev
);
1301 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1303 reply
->ret_code
= retcode
;
1304 drbd_reconfig_done(mdev
);
1310 drbd_force_state(mdev
, NS(disk
, D_FAILED
));
1314 if (nbc
->backing_bdev
)
1315 blkdev_put(nbc
->backing_bdev
,
1316 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1318 blkdev_put(nbc
->md_bdev
,
1319 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1322 lc_destroy(resync_lru
);
1324 reply
->ret_code
= retcode
;
1325 drbd_reconfig_done(mdev
);
1329 /* Detaching the disk is a process in multiple stages. First we need to lock
1330 * out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
1331 * Then we transition to D_DISKLESS, and wait for put_ldev() to return all
1332 * internal references as well.
1333 * Only then we have finally detached. */
1334 static int drbd_nl_detach(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1335 struct drbd_nl_cfg_reply
*reply
)
1337 enum drbd_ret_code retcode
;
1339 drbd_suspend_io(mdev
); /* so no-one is stuck in drbd_al_begin_io */
1340 retcode
= drbd_request_state(mdev
, NS(disk
, D_FAILED
));
1341 /* D_FAILED will transition to DISKLESS. */
1342 ret
= wait_event_interruptible(mdev
->misc_wait
,
1343 mdev
->state
.disk
!= D_FAILED
);
1344 drbd_resume_io(mdev
);
1345 if ((int)retcode
== (int)SS_IS_DISKLESS
)
1346 retcode
= SS_NOTHING_TO_DO
;
1349 reply
->ret_code
= retcode
;
1353 static int drbd_nl_net_conf(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1354 struct drbd_nl_cfg_reply
*reply
)
1357 enum drbd_ret_code retcode
;
1358 struct net_conf
*new_conf
= NULL
;
1359 struct crypto_hash
*tfm
= NULL
;
1360 struct crypto_hash
*integrity_w_tfm
= NULL
;
1361 struct crypto_hash
*integrity_r_tfm
= NULL
;
1362 struct drbd_conf
*odev
;
1363 char hmac_name
[CRYPTO_MAX_ALG_NAME
];
1364 void *int_dig_out
= NULL
;
1365 void *int_dig_in
= NULL
;
1366 void *int_dig_vv
= NULL
;
1367 struct sockaddr
*new_my_addr
, *new_peer_addr
, *taken_addr
;
1369 drbd_reconfig_start(mdev
);
1371 if (mdev
->state
.conn
> C_STANDALONE
) {
1372 retcode
= ERR_NET_CONFIGURED
;
1376 /* allocation not in the IO path, cqueue thread context */
1377 new_conf
= kzalloc(sizeof(struct net_conf
), GFP_KERNEL
);
1379 retcode
= ERR_NOMEM
;
1383 new_conf
->timeout
= DRBD_TIMEOUT_DEF
;
1384 new_conf
->try_connect_int
= DRBD_CONNECT_INT_DEF
;
1385 new_conf
->ping_int
= DRBD_PING_INT_DEF
;
1386 new_conf
->max_epoch_size
= DRBD_MAX_EPOCH_SIZE_DEF
;
1387 new_conf
->max_buffers
= DRBD_MAX_BUFFERS_DEF
;
1388 new_conf
->unplug_watermark
= DRBD_UNPLUG_WATERMARK_DEF
;
1389 new_conf
->sndbuf_size
= DRBD_SNDBUF_SIZE_DEF
;
1390 new_conf
->rcvbuf_size
= DRBD_RCVBUF_SIZE_DEF
;
1391 new_conf
->ko_count
= DRBD_KO_COUNT_DEF
;
1392 new_conf
->after_sb_0p
= DRBD_AFTER_SB_0P_DEF
;
1393 new_conf
->after_sb_1p
= DRBD_AFTER_SB_1P_DEF
;
1394 new_conf
->after_sb_2p
= DRBD_AFTER_SB_2P_DEF
;
1395 new_conf
->want_lose
= 0;
1396 new_conf
->two_primaries
= 0;
1397 new_conf
->wire_protocol
= DRBD_PROT_C
;
1398 new_conf
->ping_timeo
= DRBD_PING_TIMEO_DEF
;
1399 new_conf
->rr_conflict
= DRBD_RR_CONFLICT_DEF
;
1400 new_conf
->on_congestion
= DRBD_ON_CONGESTION_DEF
;
1401 new_conf
->cong_extents
= DRBD_CONG_EXTENTS_DEF
;
1403 if (!net_conf_from_tags(mdev
, nlp
->tag_list
, new_conf
)) {
1404 retcode
= ERR_MANDATORY_TAG
;
1408 if (new_conf
->two_primaries
1409 && (new_conf
->wire_protocol
!= DRBD_PROT_C
)) {
1410 retcode
= ERR_NOT_PROTO_C
;
1414 if (get_ldev(mdev
)) {
1415 enum drbd_fencing_p fp
= mdev
->ldev
->dc
.fencing
;
1417 if (new_conf
->wire_protocol
== DRBD_PROT_A
&& fp
== FP_STONITH
) {
1418 retcode
= ERR_STONITH_AND_PROT_A
;
1423 if (new_conf
->on_congestion
!= OC_BLOCK
&& new_conf
->wire_protocol
!= DRBD_PROT_A
) {
1424 retcode
= ERR_CONG_NOT_PROTO_A
;
1428 if (mdev
->state
.role
== R_PRIMARY
&& new_conf
->want_lose
) {
1429 retcode
= ERR_DISCARD
;
1435 new_my_addr
= (struct sockaddr
*)&new_conf
->my_addr
;
1436 new_peer_addr
= (struct sockaddr
*)&new_conf
->peer_addr
;
1437 for (i
= 0; i
< minor_count
; i
++) {
1438 odev
= minor_to_mdev(i
);
1439 if (!odev
|| odev
== mdev
)
1441 if (get_net_conf(odev
->tconn
)) {
1442 taken_addr
= (struct sockaddr
*)&odev
->tconn
->net_conf
->my_addr
;
1443 if (new_conf
->my_addr_len
== odev
->tconn
->net_conf
->my_addr_len
&&
1444 !memcmp(new_my_addr
, taken_addr
, new_conf
->my_addr_len
))
1445 retcode
= ERR_LOCAL_ADDR
;
1447 taken_addr
= (struct sockaddr
*)&odev
->tconn
->net_conf
->peer_addr
;
1448 if (new_conf
->peer_addr_len
== odev
->tconn
->net_conf
->peer_addr_len
&&
1449 !memcmp(new_peer_addr
, taken_addr
, new_conf
->peer_addr_len
))
1450 retcode
= ERR_PEER_ADDR
;
1452 put_net_conf(odev
->tconn
);
1453 if (retcode
!= NO_ERROR
)
1458 if (new_conf
->cram_hmac_alg
[0] != 0) {
1459 snprintf(hmac_name
, CRYPTO_MAX_ALG_NAME
, "hmac(%s)",
1460 new_conf
->cram_hmac_alg
);
1461 tfm
= crypto_alloc_hash(hmac_name
, 0, CRYPTO_ALG_ASYNC
);
1464 retcode
= ERR_AUTH_ALG
;
1468 if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm
))) {
1469 retcode
= ERR_AUTH_ALG_ND
;
1474 if (new_conf
->integrity_alg
[0]) {
1475 integrity_w_tfm
= crypto_alloc_hash(new_conf
->integrity_alg
, 0, CRYPTO_ALG_ASYNC
);
1476 if (IS_ERR(integrity_w_tfm
)) {
1477 integrity_w_tfm
= NULL
;
1478 retcode
=ERR_INTEGRITY_ALG
;
1482 if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm
))) {
1483 retcode
=ERR_INTEGRITY_ALG_ND
;
1487 integrity_r_tfm
= crypto_alloc_hash(new_conf
->integrity_alg
, 0, CRYPTO_ALG_ASYNC
);
1488 if (IS_ERR(integrity_r_tfm
)) {
1489 integrity_r_tfm
= NULL
;
1490 retcode
=ERR_INTEGRITY_ALG
;
1495 ((char *)new_conf
->shared_secret
)[SHARED_SECRET_MAX
-1] = 0;
1497 if (integrity_w_tfm
) {
1498 i
= crypto_hash_digestsize(integrity_w_tfm
);
1499 int_dig_out
= kmalloc(i
, GFP_KERNEL
);
1501 retcode
= ERR_NOMEM
;
1504 int_dig_in
= kmalloc(i
, GFP_KERNEL
);
1506 retcode
= ERR_NOMEM
;
1509 int_dig_vv
= kmalloc(i
, GFP_KERNEL
);
1511 retcode
= ERR_NOMEM
;
1516 if (!mdev
->bitmap
) {
1517 if(drbd_bm_init(mdev
)) {
1518 retcode
= ERR_NOMEM
;
1523 drbd_flush_workqueue(mdev
);
1524 spin_lock_irq(&mdev
->tconn
->req_lock
);
1525 if (mdev
->tconn
->net_conf
!= NULL
) {
1526 retcode
= ERR_NET_CONFIGURED
;
1527 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1530 mdev
->tconn
->net_conf
= new_conf
;
1535 crypto_free_hash(mdev
->tconn
->cram_hmac_tfm
);
1536 mdev
->tconn
->cram_hmac_tfm
= tfm
;
1538 crypto_free_hash(mdev
->tconn
->integrity_w_tfm
);
1539 mdev
->tconn
->integrity_w_tfm
= integrity_w_tfm
;
1541 crypto_free_hash(mdev
->tconn
->integrity_r_tfm
);
1542 mdev
->tconn
->integrity_r_tfm
= integrity_r_tfm
;
1544 kfree(mdev
->tconn
->int_dig_out
);
1545 kfree(mdev
->tconn
->int_dig_in
);
1546 kfree(mdev
->tconn
->int_dig_vv
);
1547 mdev
->tconn
->int_dig_out
=int_dig_out
;
1548 mdev
->tconn
->int_dig_in
=int_dig_in
;
1549 mdev
->tconn
->int_dig_vv
=int_dig_vv
;
1550 retcode
= _drbd_set_state(_NS(mdev
, conn
, C_UNCONNECTED
), CS_VERBOSE
, NULL
);
1551 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1553 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1554 reply
->ret_code
= retcode
;
1555 drbd_reconfig_done(mdev
);
1562 crypto_free_hash(tfm
);
1563 crypto_free_hash(integrity_w_tfm
);
1564 crypto_free_hash(integrity_r_tfm
);
1567 reply
->ret_code
= retcode
;
1568 drbd_reconfig_done(mdev
);
1572 static int drbd_nl_disconnect(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1573 struct drbd_nl_cfg_reply
*reply
)
1576 struct disconnect dc
;
1578 memset(&dc
, 0, sizeof(struct disconnect
));
1579 if (!disconnect_from_tags(mdev
, nlp
->tag_list
, &dc
)) {
1580 retcode
= ERR_MANDATORY_TAG
;
1585 spin_lock_irq(&mdev
->tconn
->req_lock
);
1586 if (mdev
->state
.conn
>= C_WF_CONNECTION
)
1587 _drbd_set_state(_NS(mdev
, conn
, C_DISCONNECTING
), CS_HARD
, NULL
);
1588 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1592 retcode
= _drbd_request_state(mdev
, NS(conn
, C_DISCONNECTING
), CS_ORDERED
);
1594 if (retcode
== SS_NOTHING_TO_DO
)
1596 else if (retcode
== SS_ALREADY_STANDALONE
)
1598 else if (retcode
== SS_PRIMARY_NOP
) {
1599 /* Our statche checking code wants to see the peer outdated. */
1600 retcode
= drbd_request_state(mdev
, NS2(conn
, C_DISCONNECTING
,
1602 } else if (retcode
== SS_CW_FAILED_BY_PEER
) {
1603 /* The peer probably wants to see us outdated. */
1604 retcode
= _drbd_request_state(mdev
, NS2(conn
, C_DISCONNECTING
,
1607 if (retcode
== SS_IS_DISKLESS
|| retcode
== SS_LOWER_THAN_OUTDATED
) {
1608 drbd_force_state(mdev
, NS(conn
, C_DISCONNECTING
));
1609 retcode
= SS_SUCCESS
;
1613 if (retcode
< SS_SUCCESS
)
1616 if (wait_event_interruptible(mdev
->state_wait
,
1617 mdev
->state
.conn
!= C_DISCONNECTING
)) {
1618 /* Do not test for mdev->state.conn == C_STANDALONE, since
1619 someone else might connect us in the mean time! */
1628 reply
->ret_code
= retcode
;
1632 void resync_after_online_grow(struct drbd_conf
*mdev
)
1634 int iass
; /* I am sync source */
1636 dev_info(DEV
, "Resync of new storage after online grow\n");
1637 if (mdev
->state
.role
!= mdev
->state
.peer
)
1638 iass
= (mdev
->state
.role
== R_PRIMARY
);
1640 iass
= test_bit(DISCARD_CONCURRENT
, &mdev
->tconn
->flags
);
1643 drbd_start_resync(mdev
, C_SYNC_SOURCE
);
1645 _drbd_request_state(mdev
, NS(conn
, C_WF_SYNC_UUID
), CS_VERBOSE
+ CS_SERIALIZE
);
1648 static int drbd_nl_resize(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1649 struct drbd_nl_cfg_reply
*reply
)
1652 int retcode
= NO_ERROR
;
1653 enum determine_dev_size dd
;
1654 enum dds_flags ddsf
;
1656 memset(&rs
, 0, sizeof(struct resize
));
1657 if (!resize_from_tags(mdev
, nlp
->tag_list
, &rs
)) {
1658 retcode
= ERR_MANDATORY_TAG
;
1662 if (mdev
->state
.conn
> C_CONNECTED
) {
1663 retcode
= ERR_RESIZE_RESYNC
;
1667 if (mdev
->state
.role
== R_SECONDARY
&&
1668 mdev
->state
.peer
== R_SECONDARY
) {
1669 retcode
= ERR_NO_PRIMARY
;
1673 if (!get_ldev(mdev
)) {
1674 retcode
= ERR_NO_DISK
;
1678 if (rs
.no_resync
&& mdev
->tconn
->agreed_pro_version
< 93) {
1679 retcode
= ERR_NEED_APV_93
;
1683 if (mdev
->ldev
->known_size
!= drbd_get_capacity(mdev
->ldev
->backing_bdev
))
1684 mdev
->ldev
->known_size
= drbd_get_capacity(mdev
->ldev
->backing_bdev
);
1686 mdev
->ldev
->dc
.disk_size
= (sector_t
)rs
.resize_size
;
1687 ddsf
= (rs
.resize_force
? DDSF_FORCED
: 0) | (rs
.no_resync
? DDSF_NO_RESYNC
: 0);
1688 dd
= drbd_determine_dev_size(mdev
, ddsf
);
1691 if (dd
== dev_size_error
) {
1692 retcode
= ERR_NOMEM_BITMAP
;
1696 if (mdev
->state
.conn
== C_CONNECTED
) {
1698 set_bit(RESIZE_PENDING
, &mdev
->flags
);
1700 drbd_send_uuids(mdev
);
1701 drbd_send_sizes(mdev
, 1, ddsf
);
1705 reply
->ret_code
= retcode
;
1709 static int drbd_nl_syncer_conf(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1710 struct drbd_nl_cfg_reply
*reply
)
1712 int retcode
= NO_ERROR
;
1714 int ovr
; /* online verify running */
1715 int rsr
; /* re-sync running */
1716 struct crypto_hash
*verify_tfm
= NULL
;
1717 struct crypto_hash
*csums_tfm
= NULL
;
1718 struct syncer_conf sc
;
1719 cpumask_var_t new_cpu_mask
;
1720 int *rs_plan_s
= NULL
;
1723 if (!zalloc_cpumask_var(&new_cpu_mask
, GFP_KERNEL
)) {
1724 retcode
= ERR_NOMEM
;
1728 if (nlp
->flags
& DRBD_NL_SET_DEFAULTS
) {
1729 memset(&sc
, 0, sizeof(struct syncer_conf
));
1730 sc
.rate
= DRBD_RATE_DEF
;
1731 sc
.after
= DRBD_AFTER_DEF
;
1732 sc
.al_extents
= DRBD_AL_EXTENTS_DEF
;
1733 sc
.on_no_data
= DRBD_ON_NO_DATA_DEF
;
1734 sc
.c_plan_ahead
= DRBD_C_PLAN_AHEAD_DEF
;
1735 sc
.c_delay_target
= DRBD_C_DELAY_TARGET_DEF
;
1736 sc
.c_fill_target
= DRBD_C_FILL_TARGET_DEF
;
1737 sc
.c_max_rate
= DRBD_C_MAX_RATE_DEF
;
1738 sc
.c_min_rate
= DRBD_C_MIN_RATE_DEF
;
1740 memcpy(&sc
, &mdev
->sync_conf
, sizeof(struct syncer_conf
));
1742 if (!syncer_conf_from_tags(mdev
, nlp
->tag_list
, &sc
)) {
1743 retcode
= ERR_MANDATORY_TAG
;
1747 /* re-sync running */
1748 rsr
= ( mdev
->state
.conn
== C_SYNC_SOURCE
||
1749 mdev
->state
.conn
== C_SYNC_TARGET
||
1750 mdev
->state
.conn
== C_PAUSED_SYNC_S
||
1751 mdev
->state
.conn
== C_PAUSED_SYNC_T
);
1753 if (rsr
&& strcmp(sc
.csums_alg
, mdev
->sync_conf
.csums_alg
)) {
1754 retcode
= ERR_CSUMS_RESYNC_RUNNING
;
1758 if (!rsr
&& sc
.csums_alg
[0]) {
1759 csums_tfm
= crypto_alloc_hash(sc
.csums_alg
, 0, CRYPTO_ALG_ASYNC
);
1760 if (IS_ERR(csums_tfm
)) {
1762 retcode
= ERR_CSUMS_ALG
;
1766 if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm
))) {
1767 retcode
= ERR_CSUMS_ALG_ND
;
1772 /* online verify running */
1773 ovr
= (mdev
->state
.conn
== C_VERIFY_S
|| mdev
->state
.conn
== C_VERIFY_T
);
1776 if (strcmp(sc
.verify_alg
, mdev
->sync_conf
.verify_alg
)) {
1777 retcode
= ERR_VERIFY_RUNNING
;
1782 if (!ovr
&& sc
.verify_alg
[0]) {
1783 verify_tfm
= crypto_alloc_hash(sc
.verify_alg
, 0, CRYPTO_ALG_ASYNC
);
1784 if (IS_ERR(verify_tfm
)) {
1786 retcode
= ERR_VERIFY_ALG
;
1790 if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm
))) {
1791 retcode
= ERR_VERIFY_ALG_ND
;
1796 /* silently ignore cpu mask on UP kernel */
1797 if (nr_cpu_ids
> 1 && sc
.cpu_mask
[0] != 0) {
1798 err
= __bitmap_parse(sc
.cpu_mask
, 32, 0,
1799 cpumask_bits(new_cpu_mask
), nr_cpu_ids
);
1801 dev_warn(DEV
, "__bitmap_parse() failed with %d\n", err
);
1802 retcode
= ERR_CPU_MASK_PARSE
;
1807 if (!expect(sc
.rate
>= 1))
1809 if (!expect(sc
.al_extents
>= 7))
1810 sc
.al_extents
= 127; /* arbitrary minimum */
1811 #define AL_MAX ((MD_AL_MAX_SIZE-1) * AL_EXTENTS_PT)
1812 if (sc
.al_extents
> AL_MAX
) {
1813 dev_err(DEV
, "sc.al_extents > %d\n", AL_MAX
);
1814 sc
.al_extents
= AL_MAX
;
1818 /* to avoid spurious errors when configuring minors before configuring
1819 * the minors they depend on: if necessary, first create the minor we
1822 ensure_mdev(sc
.after
, 1);
1824 /* most sanity checks done, try to assign the new sync-after
1825 * dependency. need to hold the global lock in there,
1826 * to avoid a race in the dependency loop check. */
1827 retcode
= drbd_alter_sa(mdev
, sc
.after
);
1828 if (retcode
!= NO_ERROR
)
1831 fifo_size
= (sc
.c_plan_ahead
* 10 * SLEEP_TIME
) / HZ
;
1832 if (fifo_size
!= mdev
->rs_plan_s
.size
&& fifo_size
> 0) {
1833 rs_plan_s
= kzalloc(sizeof(int) * fifo_size
, GFP_KERNEL
);
1835 dev_err(DEV
, "kmalloc of fifo_buffer failed");
1836 retcode
= ERR_NOMEM
;
1841 /* ok, assign the rest of it as well.
1842 * lock against receive_SyncParam() */
1843 spin_lock(&mdev
->peer_seq_lock
);
1844 mdev
->sync_conf
= sc
;
1847 crypto_free_hash(mdev
->csums_tfm
);
1848 mdev
->csums_tfm
= csums_tfm
;
1853 crypto_free_hash(mdev
->verify_tfm
);
1854 mdev
->verify_tfm
= verify_tfm
;
1858 if (fifo_size
!= mdev
->rs_plan_s
.size
) {
1859 kfree(mdev
->rs_plan_s
.values
);
1860 mdev
->rs_plan_s
.values
= rs_plan_s
;
1861 mdev
->rs_plan_s
.size
= fifo_size
;
1862 mdev
->rs_planed
= 0;
1866 spin_unlock(&mdev
->peer_seq_lock
);
1868 if (get_ldev(mdev
)) {
1869 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
1870 drbd_al_shrink(mdev
);
1871 err
= drbd_check_al_size(mdev
);
1872 lc_unlock(mdev
->act_log
);
1873 wake_up(&mdev
->al_wait
);
1879 retcode
= ERR_NOMEM
;
1884 if (mdev
->state
.conn
>= C_CONNECTED
)
1885 drbd_send_sync_param(mdev
, &sc
);
1887 if (!cpumask_equal(mdev
->tconn
->cpu_mask
, new_cpu_mask
)) {
1888 cpumask_copy(mdev
->tconn
->cpu_mask
, new_cpu_mask
);
1889 drbd_calc_cpu_mask(mdev
->tconn
);
1890 mdev
->tconn
->receiver
.reset_cpu_mask
= 1;
1891 mdev
->tconn
->asender
.reset_cpu_mask
= 1;
1892 mdev
->tconn
->worker
.reset_cpu_mask
= 1;
1895 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1898 free_cpumask_var(new_cpu_mask
);
1899 crypto_free_hash(csums_tfm
);
1900 crypto_free_hash(verify_tfm
);
1901 reply
->ret_code
= retcode
;
1905 static int drbd_nl_invalidate(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1906 struct drbd_nl_cfg_reply
*reply
)
1910 /* If there is still bitmap IO pending, probably because of a previous
1911 * resync just being finished, wait for it before requesting a new resync. */
1912 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
1914 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
), CS_ORDERED
);
1916 if (retcode
< SS_SUCCESS
&& retcode
!= SS_NEED_CONNECTION
)
1917 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
1919 while (retcode
== SS_NEED_CONNECTION
) {
1920 spin_lock_irq(&mdev
->tconn
->req_lock
);
1921 if (mdev
->state
.conn
< C_CONNECTED
)
1922 retcode
= _drbd_set_state(_NS(mdev
, disk
, D_INCONSISTENT
), CS_VERBOSE
, NULL
);
1923 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1925 if (retcode
!= SS_NEED_CONNECTION
)
1928 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
1931 reply
->ret_code
= retcode
;
1935 static int drbd_bmio_set_susp_al(struct drbd_conf
*mdev
)
1939 rv
= drbd_bmio_set_n_write(mdev
);
1940 drbd_suspend_al(mdev
);
1944 static int drbd_nl_invalidate_peer(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1945 struct drbd_nl_cfg_reply
*reply
)
1949 /* If there is still bitmap IO pending, probably because of a previous
1950 * resync just being finished, wait for it before requesting a new resync. */
1951 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
1953 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
), CS_ORDERED
);
1955 if (retcode
< SS_SUCCESS
) {
1956 if (retcode
== SS_NEED_CONNECTION
&& mdev
->state
.role
== R_PRIMARY
) {
1957 /* The peer will get a resync upon connect anyways. Just make that
1958 into a full resync. */
1959 retcode
= drbd_request_state(mdev
, NS(pdsk
, D_INCONSISTENT
));
1960 if (retcode
>= SS_SUCCESS
) {
1961 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_susp_al
,
1962 "set_n_write from invalidate_peer",
1963 BM_LOCKED_SET_ALLOWED
))
1964 retcode
= ERR_IO_MD_DISK
;
1967 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
));
1970 reply
->ret_code
= retcode
;
1974 static int drbd_nl_pause_sync(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1975 struct drbd_nl_cfg_reply
*reply
)
1977 int retcode
= NO_ERROR
;
1979 if (drbd_request_state(mdev
, NS(user_isp
, 1)) == SS_NOTHING_TO_DO
)
1980 retcode
= ERR_PAUSE_IS_SET
;
1982 reply
->ret_code
= retcode
;
1986 static int drbd_nl_resume_sync(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1987 struct drbd_nl_cfg_reply
*reply
)
1989 int retcode
= NO_ERROR
;
1992 if (drbd_request_state(mdev
, NS(user_isp
, 0)) == SS_NOTHING_TO_DO
) {
1994 if (s
.conn
== C_PAUSED_SYNC_S
|| s
.conn
== C_PAUSED_SYNC_T
) {
1995 retcode
= s
.aftr_isp
? ERR_PIC_AFTER_DEP
:
1996 s
.peer_isp
? ERR_PIC_PEER_DEP
: ERR_PAUSE_IS_CLEAR
;
1998 retcode
= ERR_PAUSE_IS_CLEAR
;
2002 reply
->ret_code
= retcode
;
2006 static int drbd_nl_suspend_io(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2007 struct drbd_nl_cfg_reply
*reply
)
2009 reply
->ret_code
= drbd_request_state(mdev
, NS(susp
, 1));
2014 static int drbd_nl_resume_io(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2015 struct drbd_nl_cfg_reply
*reply
)
2017 if (test_bit(NEW_CUR_UUID
, &mdev
->flags
)) {
2018 drbd_uuid_new_current(mdev
);
2019 clear_bit(NEW_CUR_UUID
, &mdev
->flags
);
2021 drbd_suspend_io(mdev
);
2022 reply
->ret_code
= drbd_request_state(mdev
, NS3(susp
, 0, susp_nod
, 0, susp_fen
, 0));
2023 if (reply
->ret_code
== SS_SUCCESS
) {
2024 if (mdev
->state
.conn
< C_CONNECTED
)
2026 if (mdev
->state
.disk
== D_DISKLESS
|| mdev
->state
.disk
== D_FAILED
)
2027 tl_restart(mdev
, FAIL_FROZEN_DISK_IO
);
2029 drbd_resume_io(mdev
);
2034 static int drbd_nl_outdate(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2035 struct drbd_nl_cfg_reply
*reply
)
2037 reply
->ret_code
= drbd_request_state(mdev
, NS(disk
, D_OUTDATED
));
2041 static int drbd_nl_get_config(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2042 struct drbd_nl_cfg_reply
*reply
)
2046 tl
= reply
->tag_list
;
2048 if (get_ldev(mdev
)) {
2049 tl
= disk_conf_to_tags(mdev
, &mdev
->ldev
->dc
, tl
);
2053 if (get_net_conf(mdev
->tconn
)) {
2054 tl
= net_conf_to_tags(mdev
, mdev
->tconn
->net_conf
, tl
);
2055 put_net_conf(mdev
->tconn
);
2057 tl
= syncer_conf_to_tags(mdev
, &mdev
->sync_conf
, tl
);
2059 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2061 return (int)((char *)tl
- (char *)reply
->tag_list
);
2064 static int drbd_nl_get_state(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2065 struct drbd_nl_cfg_reply
*reply
)
2067 unsigned short *tl
= reply
->tag_list
;
2068 union drbd_state s
= mdev
->state
;
2069 unsigned long rs_left
;
2072 tl
= get_state_to_tags(mdev
, (struct get_state
*)&s
, tl
);
2074 /* no local ref, no bitmap, no syncer progress. */
2075 if (s
.conn
>= C_SYNC_SOURCE
&& s
.conn
<= C_PAUSED_SYNC_T
) {
2076 if (get_ldev(mdev
)) {
2077 drbd_get_syncer_progress(mdev
, &rs_left
, &res
);
2078 tl
= tl_add_int(tl
, T_sync_progress
, &res
);
2082 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2084 return (int)((char *)tl
- (char *)reply
->tag_list
);
2087 static int drbd_nl_get_uuids(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2088 struct drbd_nl_cfg_reply
*reply
)
2092 tl
= reply
->tag_list
;
2094 if (get_ldev(mdev
)) {
2095 tl
= tl_add_blob(tl
, T_uuids
, mdev
->ldev
->md
.uuid
, UI_SIZE
*sizeof(u64
));
2096 tl
= tl_add_int(tl
, T_uuids_flags
, &mdev
->ldev
->md
.flags
);
2099 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2101 return (int)((char *)tl
- (char *)reply
->tag_list
);
2105 * drbd_nl_get_timeout_flag() - Used by drbdsetup to find out which timeout value to use
2106 * @mdev: DRBD device.
2107 * @nlp: Netlink/connector packet from drbdsetup
2108 * @reply: Reply packet for drbdsetup
2110 static int drbd_nl_get_timeout_flag(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2111 struct drbd_nl_cfg_reply
*reply
)
2116 tl
= reply
->tag_list
;
2118 rv
= mdev
->state
.pdsk
== D_OUTDATED
? UT_PEER_OUTDATED
:
2119 test_bit(USE_DEGR_WFC_T
, &mdev
->flags
) ? UT_DEGRADED
: UT_DEFAULT
;
2121 tl
= tl_add_blob(tl
, T_use_degraded
, &rv
, sizeof(rv
));
2122 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2124 return (int)((char *)tl
- (char *)reply
->tag_list
);
2127 static int drbd_nl_start_ov(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2128 struct drbd_nl_cfg_reply
*reply
)
2130 /* default to resume from last known position, if possible */
2131 struct start_ov args
=
2132 { .start_sector
= mdev
->ov_start_sector
};
2134 if (!start_ov_from_tags(mdev
, nlp
->tag_list
, &args
)) {
2135 reply
->ret_code
= ERR_MANDATORY_TAG
;
2139 /* If there is still bitmap IO pending, e.g. previous resync or verify
2140 * just being finished, wait for it before requesting a new resync. */
2141 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2143 /* w_make_ov_request expects position to be aligned */
2144 mdev
->ov_start_sector
= args
.start_sector
& ~BM_SECT_PER_BIT
;
2145 reply
->ret_code
= drbd_request_state(mdev
,NS(conn
,C_VERIFY_S
));
2150 static int drbd_nl_new_c_uuid(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2151 struct drbd_nl_cfg_reply
*reply
)
2153 int retcode
= NO_ERROR
;
2154 int skip_initial_sync
= 0;
2157 struct new_c_uuid args
;
2159 memset(&args
, 0, sizeof(struct new_c_uuid
));
2160 if (!new_c_uuid_from_tags(mdev
, nlp
->tag_list
, &args
)) {
2161 reply
->ret_code
= ERR_MANDATORY_TAG
;
2165 mutex_lock(&mdev
->state_mutex
); /* Protects us against serialized state changes. */
2167 if (!get_ldev(mdev
)) {
2168 retcode
= ERR_NO_DISK
;
2172 /* this is "skip initial sync", assume to be clean */
2173 if (mdev
->state
.conn
== C_CONNECTED
&& mdev
->tconn
->agreed_pro_version
>= 90 &&
2174 mdev
->ldev
->md
.uuid
[UI_CURRENT
] == UUID_JUST_CREATED
&& args
.clear_bm
) {
2175 dev_info(DEV
, "Preparing to skip initial sync\n");
2176 skip_initial_sync
= 1;
2177 } else if (mdev
->state
.conn
!= C_STANDALONE
) {
2178 retcode
= ERR_CONNECTED
;
2182 drbd_uuid_set(mdev
, UI_BITMAP
, 0); /* Rotate UI_BITMAP to History 1, etc... */
2183 drbd_uuid_new_current(mdev
); /* New current, previous to UI_BITMAP */
2185 if (args
.clear_bm
) {
2186 err
= drbd_bitmap_io(mdev
, &drbd_bmio_clear_n_write
,
2187 "clear_n_write from new_c_uuid", BM_LOCKED_MASK
);
2189 dev_err(DEV
, "Writing bitmap failed with %d\n",err
);
2190 retcode
= ERR_IO_MD_DISK
;
2192 if (skip_initial_sync
) {
2193 drbd_send_uuids_skip_initial_sync(mdev
);
2194 _drbd_uuid_set(mdev
, UI_BITMAP
, 0);
2195 drbd_print_uuids(mdev
, "cleared bitmap UUID");
2196 spin_lock_irq(&mdev
->tconn
->req_lock
);
2197 _drbd_set_state(_NS2(mdev
, disk
, D_UP_TO_DATE
, pdsk
, D_UP_TO_DATE
),
2199 spin_unlock_irq(&mdev
->tconn
->req_lock
);
2207 mutex_unlock(&mdev
->state_mutex
);
2209 reply
->ret_code
= retcode
;
2213 struct cn_handler_struct
{
2214 int (*function
)(struct drbd_conf
*,
2215 struct drbd_nl_cfg_req
*,
2216 struct drbd_nl_cfg_reply
*);
2217 int reply_body_size
;
2220 static struct cn_handler_struct cnd_table
[] = {
2221 [ P_primary
] = { &drbd_nl_primary
, 0 },
2222 [ P_secondary
] = { &drbd_nl_secondary
, 0 },
2223 [ P_disk_conf
] = { &drbd_nl_disk_conf
, 0 },
2224 [ P_detach
] = { &drbd_nl_detach
, 0 },
2225 [ P_net_conf
] = { &drbd_nl_net_conf
, 0 },
2226 [ P_disconnect
] = { &drbd_nl_disconnect
, 0 },
2227 [ P_resize
] = { &drbd_nl_resize
, 0 },
2228 [ P_syncer_conf
] = { &drbd_nl_syncer_conf
, 0 },
2229 [ P_invalidate
] = { &drbd_nl_invalidate
, 0 },
2230 [ P_invalidate_peer
] = { &drbd_nl_invalidate_peer
, 0 },
2231 [ P_pause_sync
] = { &drbd_nl_pause_sync
, 0 },
2232 [ P_resume_sync
] = { &drbd_nl_resume_sync
, 0 },
2233 [ P_suspend_io
] = { &drbd_nl_suspend_io
, 0 },
2234 [ P_resume_io
] = { &drbd_nl_resume_io
, 0 },
2235 [ P_outdate
] = { &drbd_nl_outdate
, 0 },
2236 [ P_get_config
] = { &drbd_nl_get_config
,
2237 sizeof(struct syncer_conf_tag_len_struct
) +
2238 sizeof(struct disk_conf_tag_len_struct
) +
2239 sizeof(struct net_conf_tag_len_struct
) },
2240 [ P_get_state
] = { &drbd_nl_get_state
,
2241 sizeof(struct get_state_tag_len_struct
) +
2242 sizeof(struct sync_progress_tag_len_struct
) },
2243 [ P_get_uuids
] = { &drbd_nl_get_uuids
,
2244 sizeof(struct get_uuids_tag_len_struct
) },
2245 [ P_get_timeout_flag
] = { &drbd_nl_get_timeout_flag
,
2246 sizeof(struct get_timeout_flag_tag_len_struct
)},
2247 [ P_start_ov
] = { &drbd_nl_start_ov
, 0 },
2248 [ P_new_c_uuid
] = { &drbd_nl_new_c_uuid
, 0 },
2251 static void drbd_connector_callback(struct cn_msg
*req
, struct netlink_skb_parms
*nsp
)
2253 struct drbd_nl_cfg_req
*nlp
= (struct drbd_nl_cfg_req
*)req
->data
;
2254 struct cn_handler_struct
*cm
;
2255 struct cn_msg
*cn_reply
;
2256 struct drbd_nl_cfg_reply
*reply
;
2257 struct drbd_conf
*mdev
;
2259 int reply_size
= sizeof(struct cn_msg
)
2260 + sizeof(struct drbd_nl_cfg_reply
)
2261 + sizeof(short int);
2263 if (!try_module_get(THIS_MODULE
)) {
2264 printk(KERN_ERR
"drbd: try_module_get() failed!\n");
2268 if (!cap_raised(current_cap(), CAP_SYS_ADMIN
)) {
2273 mdev
= ensure_mdev(nlp
->drbd_minor
,
2274 (nlp
->flags
& DRBD_NL_CREATE_DEVICE
));
2276 retcode
= ERR_MINOR_INVALID
;
2280 if (nlp
->packet_type
>= P_nl_after_last_packet
||
2281 nlp
->packet_type
== P_return_code_only
) {
2282 retcode
= ERR_PACKET_NR
;
2286 cm
= cnd_table
+ nlp
->packet_type
;
2288 /* This may happen if packet number is 0: */
2289 if (cm
->function
== NULL
) {
2290 retcode
= ERR_PACKET_NR
;
2294 reply_size
+= cm
->reply_body_size
;
2296 /* allocation not in the IO path, cqueue thread context */
2297 cn_reply
= kzalloc(reply_size
, GFP_KERNEL
);
2299 retcode
= ERR_NOMEM
;
2302 reply
= (struct drbd_nl_cfg_reply
*) cn_reply
->data
;
2304 reply
->packet_type
=
2305 cm
->reply_body_size
? nlp
->packet_type
: P_return_code_only
;
2306 reply
->minor
= nlp
->drbd_minor
;
2307 reply
->ret_code
= NO_ERROR
; /* Might by modified by cm->function. */
2308 /* reply->tag_list; might be modified by cm->function. */
2310 rr
= cm
->function(mdev
, nlp
, reply
);
2312 cn_reply
->id
= req
->id
;
2313 cn_reply
->seq
= req
->seq
;
2314 cn_reply
->ack
= req
->ack
+ 1;
2315 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) + rr
;
2316 cn_reply
->flags
= 0;
2318 rr
= cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_KERNEL
);
2319 if (rr
&& rr
!= -ESRCH
)
2320 printk(KERN_INFO
"drbd: cn_netlink_send()=%d\n", rr
);
2323 module_put(THIS_MODULE
);
2326 drbd_nl_send_reply(req
, retcode
);
2327 module_put(THIS_MODULE
);
2330 static atomic_t drbd_nl_seq
= ATOMIC_INIT(2); /* two. */
2332 static unsigned short *
2333 __tl_add_blob(unsigned short *tl
, enum drbd_tags tag
, const void *data
,
2334 unsigned short len
, int nul_terminated
)
2336 unsigned short l
= tag_descriptions
[tag_number(tag
)].max_len
;
2337 len
= (len
< l
) ? len
: l
;
2338 put_unaligned(tag
, tl
++);
2339 put_unaligned(len
, tl
++);
2340 memcpy(tl
, data
, len
);
2341 tl
= (unsigned short*)((char*)tl
+ len
);
2343 *((char*)tl
- 1) = 0;
2347 static unsigned short *
2348 tl_add_blob(unsigned short *tl
, enum drbd_tags tag
, const void *data
, int len
)
2350 return __tl_add_blob(tl
, tag
, data
, len
, 0);
2353 static unsigned short *
2354 tl_add_str(unsigned short *tl
, enum drbd_tags tag
, const char *str
)
2356 return __tl_add_blob(tl
, tag
, str
, strlen(str
)+1, 0);
2359 static unsigned short *
2360 tl_add_int(unsigned short *tl
, enum drbd_tags tag
, const void *val
)
2362 put_unaligned(tag
, tl
++);
2363 switch(tag_type(tag
)) {
2365 put_unaligned(sizeof(int), tl
++);
2366 put_unaligned(*(int *)val
, (int *)tl
);
2367 tl
= (unsigned short*)((char*)tl
+sizeof(int));
2370 put_unaligned(sizeof(u64
), tl
++);
2371 put_unaligned(*(u64
*)val
, (u64
*)tl
);
2372 tl
= (unsigned short*)((char*)tl
+sizeof(u64
));
2375 /* someone did something stupid. */
2381 void drbd_bcast_state(struct drbd_conf
*mdev
, union drbd_state state
)
2383 char buffer
[sizeof(struct cn_msg
)+
2384 sizeof(struct drbd_nl_cfg_reply
)+
2385 sizeof(struct get_state_tag_len_struct
)+
2387 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2388 struct drbd_nl_cfg_reply
*reply
=
2389 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2390 unsigned short *tl
= reply
->tag_list
;
2392 /* dev_warn(DEV, "drbd_bcast_state() got called\n"); */
2394 tl
= get_state_to_tags(mdev
, (struct get_state
*)&state
, tl
);
2396 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2398 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2399 cn_reply
->id
.val
= CN_VAL_DRBD
;
2401 cn_reply
->seq
= atomic_add_return(1, &drbd_nl_seq
);
2402 cn_reply
->ack
= 0; /* not used here. */
2403 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2404 (int)((char *)tl
- (char *)reply
->tag_list
);
2405 cn_reply
->flags
= 0;
2407 reply
->packet_type
= P_get_state
;
2408 reply
->minor
= mdev_to_minor(mdev
);
2409 reply
->ret_code
= NO_ERROR
;
2411 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2414 void drbd_bcast_ev_helper(struct drbd_conf
*mdev
, char *helper_name
)
2416 char buffer
[sizeof(struct cn_msg
)+
2417 sizeof(struct drbd_nl_cfg_reply
)+
2418 sizeof(struct call_helper_tag_len_struct
)+
2420 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2421 struct drbd_nl_cfg_reply
*reply
=
2422 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2423 unsigned short *tl
= reply
->tag_list
;
2425 /* dev_warn(DEV, "drbd_bcast_state() got called\n"); */
2427 tl
= tl_add_str(tl
, T_helper
, helper_name
);
2428 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2430 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2431 cn_reply
->id
.val
= CN_VAL_DRBD
;
2433 cn_reply
->seq
= atomic_add_return(1, &drbd_nl_seq
);
2434 cn_reply
->ack
= 0; /* not used here. */
2435 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2436 (int)((char *)tl
- (char *)reply
->tag_list
);
2437 cn_reply
->flags
= 0;
2439 reply
->packet_type
= P_call_helper
;
2440 reply
->minor
= mdev_to_minor(mdev
);
2441 reply
->ret_code
= NO_ERROR
;
2443 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2446 void drbd_bcast_ee(struct drbd_conf
*mdev
, const char *reason
, const int dgs
,
2447 const char *seen_hash
, const char *calc_hash
,
2448 const struct drbd_peer_request
*peer_req
)
2450 struct cn_msg
*cn_reply
;
2451 struct drbd_nl_cfg_reply
*reply
;
2458 if (!reason
|| !reason
[0])
2461 /* apparently we have to memcpy twice, first to prepare the data for the
2462 * struct cn_msg, then within cn_netlink_send from the cn_msg to the
2464 /* receiver thread context, which is not in the writeout path (of this node),
2465 * but may be in the writeout path of the _other_ node.
2466 * GFP_NOIO to avoid potential "distributed deadlock". */
2468 sizeof(struct cn_msg
)+
2469 sizeof(struct drbd_nl_cfg_reply
)+
2470 sizeof(struct dump_ee_tag_len_struct
)+
2475 dev_err(DEV
, "could not kmalloc buffer for drbd_bcast_ee, "
2476 "sector %llu, size %u\n",
2477 (unsigned long long)peer_req
->i
.sector
,
2482 reply
= (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2483 tl
= reply
->tag_list
;
2485 tl
= tl_add_str(tl
, T_dump_ee_reason
, reason
);
2486 tl
= tl_add_blob(tl
, T_seen_digest
, seen_hash
, dgs
);
2487 tl
= tl_add_blob(tl
, T_calc_digest
, calc_hash
, dgs
);
2488 tl
= tl_add_int(tl
, T_ee_sector
, &peer_req
->i
.sector
);
2489 tl
= tl_add_int(tl
, T_ee_block_id
, &peer_req
->block_id
);
2491 /* dump the first 32k */
2492 len
= min_t(unsigned, peer_req
->i
.size
, 32 << 10);
2493 put_unaligned(T_ee_data
, tl
++);
2494 put_unaligned(len
, tl
++);
2496 page
= peer_req
->pages
;
2497 page_chain_for_each(page
) {
2498 void *d
= kmap_atomic(page
, KM_USER0
);
2499 unsigned l
= min_t(unsigned, len
, PAGE_SIZE
);
2501 kunmap_atomic(d
, KM_USER0
);
2502 tl
= (unsigned short*)((char*)tl
+ l
);
2507 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2509 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2510 cn_reply
->id
.val
= CN_VAL_DRBD
;
2512 cn_reply
->seq
= atomic_add_return(1,&drbd_nl_seq
);
2513 cn_reply
->ack
= 0; // not used here.
2514 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2515 (int)((char*)tl
- (char*)reply
->tag_list
);
2516 cn_reply
->flags
= 0;
2518 reply
->packet_type
= P_dump_ee
;
2519 reply
->minor
= mdev_to_minor(mdev
);
2520 reply
->ret_code
= NO_ERROR
;
2522 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2526 void drbd_bcast_sync_progress(struct drbd_conf
*mdev
)
2528 char buffer
[sizeof(struct cn_msg
)+
2529 sizeof(struct drbd_nl_cfg_reply
)+
2530 sizeof(struct sync_progress_tag_len_struct
)+
2532 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2533 struct drbd_nl_cfg_reply
*reply
=
2534 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2535 unsigned short *tl
= reply
->tag_list
;
2536 unsigned long rs_left
;
2539 /* no local ref, no bitmap, no syncer progress, no broadcast. */
2540 if (!get_ldev(mdev
))
2542 drbd_get_syncer_progress(mdev
, &rs_left
, &res
);
2545 tl
= tl_add_int(tl
, T_sync_progress
, &res
);
2546 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2548 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2549 cn_reply
->id
.val
= CN_VAL_DRBD
;
2551 cn_reply
->seq
= atomic_add_return(1, &drbd_nl_seq
);
2552 cn_reply
->ack
= 0; /* not used here. */
2553 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2554 (int)((char *)tl
- (char *)reply
->tag_list
);
2555 cn_reply
->flags
= 0;
2557 reply
->packet_type
= P_sync_progress
;
2558 reply
->minor
= mdev_to_minor(mdev
);
2559 reply
->ret_code
= NO_ERROR
;
2561 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2564 int __init
drbd_nl_init(void)
2566 static struct cb_id cn_id_drbd
;
2569 cn_id_drbd
.val
= CN_VAL_DRBD
;
2571 cn_id_drbd
.idx
= cn_idx
;
2572 err
= cn_add_callback(&cn_id_drbd
, "cn_drbd", &drbd_connector_callback
);
2575 cn_idx
= (cn_idx
+ CN_IDX_STEP
);
2579 printk(KERN_ERR
"drbd: cn_drbd failed to register\n");
2586 void drbd_nl_cleanup(void)
2588 static struct cb_id cn_id_drbd
;
2590 cn_id_drbd
.idx
= cn_idx
;
2591 cn_id_drbd
.val
= CN_VAL_DRBD
;
2593 cn_del_callback(&cn_id_drbd
);
2596 void drbd_nl_send_reply(struct cn_msg
*req
, int ret_code
)
2598 char buffer
[sizeof(struct cn_msg
)+sizeof(struct drbd_nl_cfg_reply
)];
2599 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2600 struct drbd_nl_cfg_reply
*reply
=
2601 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2604 memset(buffer
, 0, sizeof(buffer
));
2605 cn_reply
->id
= req
->id
;
2607 cn_reply
->seq
= req
->seq
;
2608 cn_reply
->ack
= req
->ack
+ 1;
2609 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
);
2610 cn_reply
->flags
= 0;
2612 reply
->packet_type
= P_return_code_only
;
2613 reply
->minor
= ((struct drbd_nl_cfg_req
*)req
->data
)->drbd_minor
;
2614 reply
->ret_code
= ret_code
;
2616 rr
= cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2617 if (rr
&& rr
!= -ESRCH
)
2618 printk(KERN_INFO
"drbd: cn_netlink_send()=%d\n", rr
);