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( \
54 unsigned short *tags, struct name *arg) __attribute__ ((unused)); \
55 static int name ## _from_tags( \
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 printk(KERN_ERR "drbd: 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 printk(KERN_ERR "drbd: 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* \
103 struct name *arg, unsigned short *tags) __attribute__ ((unused)); \
104 static unsigned short* \
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(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_SECTORS
;
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
>= DRBD_AL_EXTENTS_MIN
))
755 mdev
->sync_conf
.al_extents
= DRBD_AL_EXTENTS_MIN
;
758 mdev
->act_log
->nr_elements
== mdev
->sync_conf
.al_extents
)
763 n
= lc_create("act_log", drbd_al_ext_cache
, AL_UPDATES_PER_TRANSACTION
,
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 conn_reconfig_start(struct drbd_tconn
*tconn
)
876 wait_event(tconn
->ping_wait
, !test_and_set_bit(CONFIG_PENDING
, &tconn
->flags
));
877 wait_event(tconn
->ping_wait
, !test_bit(OBJECT_DYING
, &tconn
->flags
));
878 drbd_thread_start(&tconn
->worker
);
879 conn_flush_workqueue(tconn
);
882 /* if still unconfigured, stops worker again.
883 * if configured now, clears CONFIG_PENDING.
884 * wakes potential waiters */
885 static void conn_reconfig_done(struct drbd_tconn
*tconn
)
887 spin_lock_irq(&tconn
->req_lock
);
888 if (conn_all_vols_unconf(tconn
)) {
889 set_bit(OBJECT_DYING
, &tconn
->flags
);
890 drbd_thread_stop_nowait(&tconn
->worker
);
892 clear_bit(CONFIG_PENDING
, &tconn
->flags
);
893 spin_unlock_irq(&tconn
->req_lock
);
894 wake_up(&tconn
->ping_wait
);
897 /* Make sure IO is suspended before calling this function(). */
898 static void drbd_suspend_al(struct drbd_conf
*mdev
)
902 if (!lc_try_lock(mdev
->act_log
)) {
903 dev_warn(DEV
, "Failed to lock al in drbd_suspend_al()\n");
907 drbd_al_shrink(mdev
);
908 spin_lock_irq(&mdev
->tconn
->req_lock
);
909 if (mdev
->state
.conn
< C_CONNECTED
)
910 s
= !test_and_set_bit(AL_SUSPENDED
, &mdev
->flags
);
911 spin_unlock_irq(&mdev
->tconn
->req_lock
);
912 lc_unlock(mdev
->act_log
);
915 dev_info(DEV
, "Suspended AL updates\n");
918 /* does always return 0;
919 * interesting return code is in reply->ret_code */
920 static int drbd_nl_disk_conf(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
921 struct drbd_nl_cfg_reply
*reply
)
923 enum drbd_ret_code retcode
;
924 enum determine_dev_size dd
;
925 sector_t max_possible_sectors
;
926 sector_t min_md_device_sectors
;
927 struct drbd_backing_dev
*nbc
= NULL
; /* new_backing_conf */
928 struct block_device
*bdev
;
929 struct lru_cache
*resync_lru
= NULL
;
930 union drbd_state ns
, os
;
931 enum drbd_state_rv rv
;
932 int cp_discovered
= 0;
934 conn_reconfig_start(mdev
->tconn
);
936 /* if you want to reconfigure, please tear down first */
937 if (mdev
->state
.disk
> D_DISKLESS
) {
938 retcode
= ERR_DISK_CONFIGURED
;
941 /* It may just now have detached because of IO error. Make sure
942 * drbd_ldev_destroy is done already, we may end up here very fast,
943 * e.g. if someone calls attach from the on-io-error handler,
944 * to realize a "hot spare" feature (not that I'd recommend that) */
945 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->local_cnt
));
947 /* allocation not in the IO path, cqueue thread context */
948 nbc
= kzalloc(sizeof(struct drbd_backing_dev
), GFP_KERNEL
);
954 nbc
->dc
.disk_size
= DRBD_DISK_SIZE_SECT_DEF
;
955 nbc
->dc
.on_io_error
= DRBD_ON_IO_ERROR_DEF
;
956 nbc
->dc
.fencing
= DRBD_FENCING_DEF
;
957 nbc
->dc
.max_bio_bvecs
= DRBD_MAX_BIO_BVECS_DEF
;
959 if (!disk_conf_from_tags(nlp
->tag_list
, &nbc
->dc
)) {
960 retcode
= ERR_MANDATORY_TAG
;
964 if (nbc
->dc
.meta_dev_idx
< DRBD_MD_INDEX_FLEX_INT
) {
965 retcode
= ERR_MD_IDX_INVALID
;
969 if (get_net_conf(mdev
->tconn
)) {
970 int prot
= mdev
->tconn
->net_conf
->wire_protocol
;
971 put_net_conf(mdev
->tconn
);
972 if (nbc
->dc
.fencing
== FP_STONITH
&& prot
== DRBD_PROT_A
) {
973 retcode
= ERR_STONITH_AND_PROT_A
;
978 bdev
= blkdev_get_by_path(nbc
->dc
.backing_dev
,
979 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
, mdev
);
981 dev_err(DEV
, "open(\"%s\") failed with %ld\n", nbc
->dc
.backing_dev
,
983 retcode
= ERR_OPEN_DISK
;
986 nbc
->backing_bdev
= bdev
;
989 * meta_dev_idx >= 0: external fixed size, possibly multiple
990 * drbd sharing one meta device. TODO in that case, paranoia
991 * check that [md_bdev, meta_dev_idx] is not yet used by some
992 * other drbd minor! (if you use drbd.conf + drbdadm, that
993 * should check it for you already; but if you don't, or
994 * someone fooled it, we need to double check here)
996 bdev
= blkdev_get_by_path(nbc
->dc
.meta_dev
,
997 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
,
998 (nbc
->dc
.meta_dev_idx
< 0) ?
999 (void *)mdev
: (void *)drbd_m_holder
);
1001 dev_err(DEV
, "open(\"%s\") failed with %ld\n", nbc
->dc
.meta_dev
,
1003 retcode
= ERR_OPEN_MD_DISK
;
1006 nbc
->md_bdev
= bdev
;
1008 if ((nbc
->backing_bdev
== nbc
->md_bdev
) !=
1009 (nbc
->dc
.meta_dev_idx
== DRBD_MD_INDEX_INTERNAL
||
1010 nbc
->dc
.meta_dev_idx
== DRBD_MD_INDEX_FLEX_INT
)) {
1011 retcode
= ERR_MD_IDX_INVALID
;
1015 resync_lru
= lc_create("resync", drbd_bm_ext_cache
,
1016 1, 61, sizeof(struct bm_extent
),
1017 offsetof(struct bm_extent
, lce
));
1019 retcode
= ERR_NOMEM
;
1023 /* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */
1024 drbd_md_set_sector_offsets(mdev
, nbc
);
1026 if (drbd_get_max_capacity(nbc
) < nbc
->dc
.disk_size
) {
1027 dev_err(DEV
, "max capacity %llu smaller than disk size %llu\n",
1028 (unsigned long long) drbd_get_max_capacity(nbc
),
1029 (unsigned long long) nbc
->dc
.disk_size
);
1030 retcode
= ERR_DISK_TO_SMALL
;
1034 if (nbc
->dc
.meta_dev_idx
< 0) {
1035 max_possible_sectors
= DRBD_MAX_SECTORS_FLEX
;
1036 /* at least one MB, otherwise it does not make sense */
1037 min_md_device_sectors
= (2<<10);
1039 max_possible_sectors
= DRBD_MAX_SECTORS
;
1040 min_md_device_sectors
= MD_RESERVED_SECT
* (nbc
->dc
.meta_dev_idx
+ 1);
1043 if (drbd_get_capacity(nbc
->md_bdev
) < min_md_device_sectors
) {
1044 retcode
= ERR_MD_DISK_TO_SMALL
;
1045 dev_warn(DEV
, "refusing attach: md-device too small, "
1046 "at least %llu sectors needed for this meta-disk type\n",
1047 (unsigned long long) min_md_device_sectors
);
1051 /* Make sure the new disk is big enough
1052 * (we may currently be R_PRIMARY with no local disk...) */
1053 if (drbd_get_max_capacity(nbc
) <
1054 drbd_get_capacity(mdev
->this_bdev
)) {
1055 retcode
= ERR_DISK_TO_SMALL
;
1059 nbc
->known_size
= drbd_get_capacity(nbc
->backing_bdev
);
1061 if (nbc
->known_size
> max_possible_sectors
) {
1062 dev_warn(DEV
, "==> truncating very big lower level device "
1063 "to currently maximum possible %llu sectors <==\n",
1064 (unsigned long long) max_possible_sectors
);
1065 if (nbc
->dc
.meta_dev_idx
>= 0)
1066 dev_warn(DEV
, "==>> using internal or flexible "
1067 "meta data may help <<==\n");
1070 drbd_suspend_io(mdev
);
1071 /* also wait for the last barrier ack. */
1072 wait_event(mdev
->misc_wait
, !atomic_read(&mdev
->ap_pending_cnt
) || is_susp(mdev
->state
));
1073 /* and for any other previously queued work */
1074 drbd_flush_workqueue(mdev
);
1076 rv
= _drbd_request_state(mdev
, NS(disk
, D_ATTACHING
), CS_VERBOSE
);
1077 retcode
= rv
; /* FIXME: Type mismatch. */
1078 drbd_resume_io(mdev
);
1079 if (rv
< SS_SUCCESS
)
1082 if (!get_ldev_if_state(mdev
, D_ATTACHING
))
1083 goto force_diskless
;
1085 drbd_md_set_sector_offsets(mdev
, nbc
);
1087 if (!mdev
->bitmap
) {
1088 if (drbd_bm_init(mdev
)) {
1089 retcode
= ERR_NOMEM
;
1090 goto force_diskless_dec
;
1094 retcode
= drbd_md_read(mdev
, nbc
);
1095 if (retcode
!= NO_ERROR
)
1096 goto force_diskless_dec
;
1098 if (mdev
->state
.conn
< C_CONNECTED
&&
1099 mdev
->state
.role
== R_PRIMARY
&&
1100 (mdev
->ed_uuid
& ~((u64
)1)) != (nbc
->md
.uuid
[UI_CURRENT
] & ~((u64
)1))) {
1101 dev_err(DEV
, "Can only attach to data with current UUID=%016llX\n",
1102 (unsigned long long)mdev
->ed_uuid
);
1103 retcode
= ERR_DATA_NOT_CURRENT
;
1104 goto force_diskless_dec
;
1107 /* Since we are diskless, fix the activity log first... */
1108 if (drbd_check_al_size(mdev
)) {
1109 retcode
= ERR_NOMEM
;
1110 goto force_diskless_dec
;
1113 /* Prevent shrinking of consistent devices ! */
1114 if (drbd_md_test_flag(nbc
, MDF_CONSISTENT
) &&
1115 drbd_new_dev_size(mdev
, nbc
, 0) < nbc
->md
.la_size_sect
) {
1116 dev_warn(DEV
, "refusing to truncate a consistent device\n");
1117 retcode
= ERR_DISK_TO_SMALL
;
1118 goto force_diskless_dec
;
1121 if (!drbd_al_read_log(mdev
, nbc
)) {
1122 retcode
= ERR_IO_MD_DISK
;
1123 goto force_diskless_dec
;
1126 /* Reset the "barriers don't work" bits here, then force meta data to
1127 * be written, to ensure we determine if barriers are supported. */
1128 if (nbc
->dc
.no_md_flush
)
1129 set_bit(MD_NO_FUA
, &mdev
->flags
);
1131 clear_bit(MD_NO_FUA
, &mdev
->flags
);
1133 /* Point of no return reached.
1134 * Devices and memory are no longer released by error cleanup below.
1135 * now mdev takes over responsibility, and the state engine should
1136 * clean it up somewhere. */
1137 D_ASSERT(mdev
->ldev
== NULL
);
1139 mdev
->resync
= resync_lru
;
1143 mdev
->write_ordering
= WO_bdev_flush
;
1144 drbd_bump_write_ordering(mdev
, WO_bdev_flush
);
1146 if (drbd_md_test_flag(mdev
->ldev
, MDF_CRASHED_PRIMARY
))
1147 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1149 clear_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1151 if (drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1152 !(mdev
->state
.role
== R_PRIMARY
&& mdev
->state
.susp_nod
)) {
1153 set_bit(CRASHED_PRIMARY
, &mdev
->flags
);
1162 drbd_reconsider_max_bio_size(mdev
);
1164 /* If I am currently not R_PRIMARY,
1165 * but meta data primary indicator is set,
1166 * I just now recover from a hard crash,
1167 * and have been R_PRIMARY before that crash.
1169 * Now, if I had no connection before that crash
1170 * (have been degraded R_PRIMARY), chances are that
1171 * I won't find my peer now either.
1173 * In that case, and _only_ in that case,
1174 * we use the degr-wfc-timeout instead of the default,
1175 * so we can automatically recover from a crash of a
1176 * degraded but active "cluster" after a certain timeout.
1178 clear_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1179 if (mdev
->state
.role
!= R_PRIMARY
&&
1180 drbd_md_test_flag(mdev
->ldev
, MDF_PRIMARY_IND
) &&
1181 !drbd_md_test_flag(mdev
->ldev
, MDF_CONNECTED_IND
))
1182 set_bit(USE_DEGR_WFC_T
, &mdev
->flags
);
1184 dd
= drbd_determine_dev_size(mdev
, 0);
1185 if (dd
== dev_size_error
) {
1186 retcode
= ERR_NOMEM_BITMAP
;
1187 goto force_diskless_dec
;
1188 } else if (dd
== grew
)
1189 set_bit(RESYNC_AFTER_NEG
, &mdev
->flags
);
1191 if (drbd_md_test_flag(mdev
->ldev
, MDF_FULL_SYNC
)) {
1192 dev_info(DEV
, "Assuming that all blocks are out of sync "
1193 "(aka FullSync)\n");
1194 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_n_write
,
1195 "set_n_write from attaching", BM_LOCKED_MASK
)) {
1196 retcode
= ERR_IO_MD_DISK
;
1197 goto force_diskless_dec
;
1200 if (drbd_bitmap_io(mdev
, &drbd_bm_read
,
1201 "read from attaching", BM_LOCKED_MASK
) < 0) {
1202 retcode
= ERR_IO_MD_DISK
;
1203 goto force_diskless_dec
;
1207 if (cp_discovered
) {
1208 drbd_al_apply_to_bm(mdev
);
1209 if (drbd_bitmap_io(mdev
, &drbd_bm_write
,
1210 "crashed primary apply AL", BM_LOCKED_MASK
)) {
1211 retcode
= ERR_IO_MD_DISK
;
1212 goto force_diskless_dec
;
1216 if (_drbd_bm_total_weight(mdev
) == drbd_bm_bits(mdev
))
1217 drbd_suspend_al(mdev
); /* IO is still suspended here... */
1219 spin_lock_irq(&mdev
->tconn
->req_lock
);
1222 /* If MDF_CONSISTENT is not set go into inconsistent state,
1223 otherwise investigate MDF_WasUpToDate...
1224 If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
1225 otherwise into D_CONSISTENT state.
1227 if (drbd_md_test_flag(mdev
->ldev
, MDF_CONSISTENT
)) {
1228 if (drbd_md_test_flag(mdev
->ldev
, MDF_WAS_UP_TO_DATE
))
1229 ns
.disk
= D_CONSISTENT
;
1231 ns
.disk
= D_OUTDATED
;
1233 ns
.disk
= D_INCONSISTENT
;
1236 if (drbd_md_test_flag(mdev
->ldev
, MDF_PEER_OUT_DATED
))
1237 ns
.pdsk
= D_OUTDATED
;
1239 if ( ns
.disk
== D_CONSISTENT
&&
1240 (ns
.pdsk
== D_OUTDATED
|| mdev
->ldev
->dc
.fencing
== FP_DONT_CARE
))
1241 ns
.disk
= D_UP_TO_DATE
;
1243 /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
1244 MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
1245 this point, because drbd_request_state() modifies these
1248 /* In case we are C_CONNECTED postpone any decision on the new disk
1249 state after the negotiation phase. */
1250 if (mdev
->state
.conn
== C_CONNECTED
) {
1251 mdev
->new_state_tmp
.i
= ns
.i
;
1253 ns
.disk
= D_NEGOTIATING
;
1255 /* We expect to receive up-to-date UUIDs soon.
1256 To avoid a race in receive_state, free p_uuid while
1257 holding req_lock. I.e. atomic with the state change */
1258 kfree(mdev
->p_uuid
);
1259 mdev
->p_uuid
= NULL
;
1262 rv
= _drbd_set_state(mdev
, ns
, CS_VERBOSE
, NULL
);
1264 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1266 if (rv
< SS_SUCCESS
)
1267 goto force_diskless_dec
;
1269 if (mdev
->state
.role
== R_PRIMARY
)
1270 mdev
->ldev
->md
.uuid
[UI_CURRENT
] |= (u64
)1;
1272 mdev
->ldev
->md
.uuid
[UI_CURRENT
] &= ~(u64
)1;
1274 drbd_md_mark_dirty(mdev
);
1277 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1279 reply
->ret_code
= retcode
;
1280 conn_reconfig_done(mdev
->tconn
);
1286 drbd_force_state(mdev
, NS(disk
, D_FAILED
));
1290 if (nbc
->backing_bdev
)
1291 blkdev_put(nbc
->backing_bdev
,
1292 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1294 blkdev_put(nbc
->md_bdev
,
1295 FMODE_READ
| FMODE_WRITE
| FMODE_EXCL
);
1298 lc_destroy(resync_lru
);
1300 reply
->ret_code
= retcode
;
1301 conn_reconfig_done(mdev
->tconn
);
1305 /* Detaching the disk is a process in multiple stages. First we need to lock
1306 * out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
1307 * Then we transition to D_DISKLESS, and wait for put_ldev() to return all
1308 * internal references as well.
1309 * Only then we have finally detached. */
1310 static int drbd_nl_detach(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1311 struct drbd_nl_cfg_reply
*reply
)
1313 enum drbd_ret_code retcode
;
1315 drbd_suspend_io(mdev
); /* so no-one is stuck in drbd_al_begin_io */
1316 retcode
= drbd_request_state(mdev
, NS(disk
, D_FAILED
));
1317 /* D_FAILED will transition to DISKLESS. */
1318 ret
= wait_event_interruptible(mdev
->misc_wait
,
1319 mdev
->state
.disk
!= D_FAILED
);
1320 drbd_resume_io(mdev
);
1321 if ((int)retcode
== (int)SS_IS_DISKLESS
)
1322 retcode
= SS_NOTHING_TO_DO
;
1325 reply
->ret_code
= retcode
;
1329 static int drbd_nl_net_conf(struct drbd_tconn
*tconn
, struct drbd_nl_cfg_req
*nlp
,
1330 struct drbd_nl_cfg_reply
*reply
)
1333 enum drbd_ret_code retcode
;
1334 struct net_conf
*new_conf
= NULL
;
1335 struct crypto_hash
*tfm
= NULL
;
1336 struct crypto_hash
*integrity_w_tfm
= NULL
;
1337 struct crypto_hash
*integrity_r_tfm
= NULL
;
1338 struct drbd_conf
*mdev
;
1339 char hmac_name
[CRYPTO_MAX_ALG_NAME
];
1340 void *int_dig_out
= NULL
;
1341 void *int_dig_in
= NULL
;
1342 void *int_dig_vv
= NULL
;
1343 struct drbd_tconn
*oconn
;
1344 struct sockaddr
*new_my_addr
, *new_peer_addr
, *taken_addr
;
1346 conn_reconfig_start(tconn
);
1348 if (tconn
->cstate
> C_STANDALONE
) {
1349 retcode
= ERR_NET_CONFIGURED
;
1353 /* allocation not in the IO path, cqueue thread context */
1354 new_conf
= kzalloc(sizeof(struct net_conf
), GFP_KERNEL
);
1356 retcode
= ERR_NOMEM
;
1360 new_conf
->timeout
= DRBD_TIMEOUT_DEF
;
1361 new_conf
->try_connect_int
= DRBD_CONNECT_INT_DEF
;
1362 new_conf
->ping_int
= DRBD_PING_INT_DEF
;
1363 new_conf
->max_epoch_size
= DRBD_MAX_EPOCH_SIZE_DEF
;
1364 new_conf
->max_buffers
= DRBD_MAX_BUFFERS_DEF
;
1365 new_conf
->unplug_watermark
= DRBD_UNPLUG_WATERMARK_DEF
;
1366 new_conf
->sndbuf_size
= DRBD_SNDBUF_SIZE_DEF
;
1367 new_conf
->rcvbuf_size
= DRBD_RCVBUF_SIZE_DEF
;
1368 new_conf
->ko_count
= DRBD_KO_COUNT_DEF
;
1369 new_conf
->after_sb_0p
= DRBD_AFTER_SB_0P_DEF
;
1370 new_conf
->after_sb_1p
= DRBD_AFTER_SB_1P_DEF
;
1371 new_conf
->after_sb_2p
= DRBD_AFTER_SB_2P_DEF
;
1372 new_conf
->want_lose
= 0;
1373 new_conf
->two_primaries
= 0;
1374 new_conf
->wire_protocol
= DRBD_PROT_C
;
1375 new_conf
->ping_timeo
= DRBD_PING_TIMEO_DEF
;
1376 new_conf
->rr_conflict
= DRBD_RR_CONFLICT_DEF
;
1377 new_conf
->on_congestion
= DRBD_ON_CONGESTION_DEF
;
1378 new_conf
->cong_extents
= DRBD_CONG_EXTENTS_DEF
;
1380 if (!net_conf_from_tags(nlp
->tag_list
, new_conf
)) {
1381 retcode
= ERR_MANDATORY_TAG
;
1385 if (new_conf
->two_primaries
1386 && (new_conf
->wire_protocol
!= DRBD_PROT_C
)) {
1387 retcode
= ERR_NOT_PROTO_C
;
1391 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1392 if (get_ldev(mdev
)) {
1393 enum drbd_fencing_p fp
= mdev
->ldev
->dc
.fencing
;
1395 if (new_conf
->wire_protocol
== DRBD_PROT_A
&& fp
== FP_STONITH
) {
1396 retcode
= ERR_STONITH_AND_PROT_A
;
1400 if (mdev
->state
.role
== R_PRIMARY
&& new_conf
->want_lose
) {
1401 retcode
= ERR_DISCARD
;
1404 if (!mdev
->bitmap
) {
1405 if(drbd_bm_init(mdev
)) {
1406 retcode
= ERR_NOMEM
;
1412 if (new_conf
->on_congestion
!= OC_BLOCK
&& new_conf
->wire_protocol
!= DRBD_PROT_A
) {
1413 retcode
= ERR_CONG_NOT_PROTO_A
;
1419 new_my_addr
= (struct sockaddr
*)&new_conf
->my_addr
;
1420 new_peer_addr
= (struct sockaddr
*)&new_conf
->peer_addr
;
1421 list_for_each_entry(oconn
, &drbd_tconns
, all_tconn
) {
1424 if (get_net_conf(oconn
)) {
1425 taken_addr
= (struct sockaddr
*)&oconn
->net_conf
->my_addr
;
1426 if (new_conf
->my_addr_len
== oconn
->net_conf
->my_addr_len
&&
1427 !memcmp(new_my_addr
, taken_addr
, new_conf
->my_addr_len
))
1428 retcode
= ERR_LOCAL_ADDR
;
1430 taken_addr
= (struct sockaddr
*)&oconn
->net_conf
->peer_addr
;
1431 if (new_conf
->peer_addr_len
== oconn
->net_conf
->peer_addr_len
&&
1432 !memcmp(new_peer_addr
, taken_addr
, new_conf
->peer_addr_len
))
1433 retcode
= ERR_PEER_ADDR
;
1435 put_net_conf(oconn
);
1436 if (retcode
!= NO_ERROR
)
1441 if (new_conf
->cram_hmac_alg
[0] != 0) {
1442 snprintf(hmac_name
, CRYPTO_MAX_ALG_NAME
, "hmac(%s)",
1443 new_conf
->cram_hmac_alg
);
1444 tfm
= crypto_alloc_hash(hmac_name
, 0, CRYPTO_ALG_ASYNC
);
1447 retcode
= ERR_AUTH_ALG
;
1451 if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm
))) {
1452 retcode
= ERR_AUTH_ALG_ND
;
1457 if (new_conf
->integrity_alg
[0]) {
1458 integrity_w_tfm
= crypto_alloc_hash(new_conf
->integrity_alg
, 0, CRYPTO_ALG_ASYNC
);
1459 if (IS_ERR(integrity_w_tfm
)) {
1460 integrity_w_tfm
= NULL
;
1461 retcode
=ERR_INTEGRITY_ALG
;
1465 if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm
))) {
1466 retcode
=ERR_INTEGRITY_ALG_ND
;
1470 integrity_r_tfm
= crypto_alloc_hash(new_conf
->integrity_alg
, 0, CRYPTO_ALG_ASYNC
);
1471 if (IS_ERR(integrity_r_tfm
)) {
1472 integrity_r_tfm
= NULL
;
1473 retcode
=ERR_INTEGRITY_ALG
;
1478 ((char *)new_conf
->shared_secret
)[SHARED_SECRET_MAX
-1] = 0;
1480 /* allocation not in the IO path, cqueue thread context */
1481 if (integrity_w_tfm
) {
1482 i
= crypto_hash_digestsize(integrity_w_tfm
);
1483 int_dig_out
= kmalloc(i
, GFP_KERNEL
);
1485 retcode
= ERR_NOMEM
;
1488 int_dig_in
= kmalloc(i
, GFP_KERNEL
);
1490 retcode
= ERR_NOMEM
;
1493 int_dig_vv
= kmalloc(i
, GFP_KERNEL
);
1495 retcode
= ERR_NOMEM
;
1500 conn_flush_workqueue(tconn
);
1501 spin_lock_irq(&tconn
->req_lock
);
1502 if (tconn
->net_conf
!= NULL
) {
1503 retcode
= ERR_NET_CONFIGURED
;
1504 spin_unlock_irq(&tconn
->req_lock
);
1507 tconn
->net_conf
= new_conf
;
1509 crypto_free_hash(tconn
->cram_hmac_tfm
);
1510 tconn
->cram_hmac_tfm
= tfm
;
1512 crypto_free_hash(tconn
->integrity_w_tfm
);
1513 tconn
->integrity_w_tfm
= integrity_w_tfm
;
1515 crypto_free_hash(tconn
->integrity_r_tfm
);
1516 tconn
->integrity_r_tfm
= integrity_r_tfm
;
1518 kfree(tconn
->int_dig_out
);
1519 kfree(tconn
->int_dig_in
);
1520 kfree(tconn
->int_dig_vv
);
1521 tconn
->int_dig_out
=int_dig_out
;
1522 tconn
->int_dig_in
=int_dig_in
;
1523 tconn
->int_dig_vv
=int_dig_vv
;
1524 retcode
= _conn_request_state(tconn
, NS(conn
, C_UNCONNECTED
), CS_VERBOSE
);
1525 spin_unlock_irq(&tconn
->req_lock
);
1527 idr_for_each_entry(&tconn
->volumes
, mdev
, i
) {
1530 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1532 reply
->ret_code
= retcode
;
1533 conn_reconfig_done(tconn
);
1540 crypto_free_hash(tfm
);
1541 crypto_free_hash(integrity_w_tfm
);
1542 crypto_free_hash(integrity_r_tfm
);
1545 reply
->ret_code
= retcode
;
1546 conn_reconfig_done(tconn
);
1550 static int drbd_nl_disconnect(struct drbd_tconn
*tconn
, struct drbd_nl_cfg_req
*nlp
,
1551 struct drbd_nl_cfg_reply
*reply
)
1554 struct disconnect dc
;
1556 memset(&dc
, 0, sizeof(struct disconnect
));
1557 if (!disconnect_from_tags(nlp
->tag_list
, &dc
)) {
1558 retcode
= ERR_MANDATORY_TAG
;
1563 spin_lock_irq(&tconn
->req_lock
);
1564 if (tconn
->cstate
>= C_WF_CONNECTION
)
1565 _conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
), CS_HARD
);
1566 spin_unlock_irq(&tconn
->req_lock
);
1570 retcode
= conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
), 0);
1572 if (retcode
== SS_NOTHING_TO_DO
)
1574 else if (retcode
== SS_ALREADY_STANDALONE
)
1576 else if (retcode
== SS_PRIMARY_NOP
) {
1577 /* Our state checking code wants to see the peer outdated. */
1578 retcode
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
1579 pdsk
, D_OUTDATED
), CS_VERBOSE
);
1580 } else if (retcode
== SS_CW_FAILED_BY_PEER
) {
1581 /* The peer probably wants to see us outdated. */
1582 retcode
= conn_request_state(tconn
, NS2(conn
, C_DISCONNECTING
,
1583 disk
, D_OUTDATED
), 0);
1584 if (retcode
== SS_IS_DISKLESS
|| retcode
== SS_LOWER_THAN_OUTDATED
) {
1585 conn_request_state(tconn
, NS(conn
, C_DISCONNECTING
), CS_HARD
);
1586 retcode
= SS_SUCCESS
;
1590 if (retcode
< SS_SUCCESS
)
1593 if (wait_event_interruptible(tconn
->ping_wait
,
1594 tconn
->cstate
!= C_DISCONNECTING
)) {
1595 /* Do not test for mdev->state.conn == C_STANDALONE, since
1596 someone else might connect us in the mean time! */
1604 reply
->ret_code
= retcode
;
1608 void resync_after_online_grow(struct drbd_conf
*mdev
)
1610 int iass
; /* I am sync source */
1612 dev_info(DEV
, "Resync of new storage after online grow\n");
1613 if (mdev
->state
.role
!= mdev
->state
.peer
)
1614 iass
= (mdev
->state
.role
== R_PRIMARY
);
1616 iass
= test_bit(DISCARD_CONCURRENT
, &mdev
->tconn
->flags
);
1619 drbd_start_resync(mdev
, C_SYNC_SOURCE
);
1621 _drbd_request_state(mdev
, NS(conn
, C_WF_SYNC_UUID
), CS_VERBOSE
+ CS_SERIALIZE
);
1624 static int drbd_nl_resize(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1625 struct drbd_nl_cfg_reply
*reply
)
1628 int retcode
= NO_ERROR
;
1629 enum determine_dev_size dd
;
1630 enum dds_flags ddsf
;
1632 memset(&rs
, 0, sizeof(struct resize
));
1633 if (!resize_from_tags(nlp
->tag_list
, &rs
)) {
1634 retcode
= ERR_MANDATORY_TAG
;
1638 if (mdev
->state
.conn
> C_CONNECTED
) {
1639 retcode
= ERR_RESIZE_RESYNC
;
1643 if (mdev
->state
.role
== R_SECONDARY
&&
1644 mdev
->state
.peer
== R_SECONDARY
) {
1645 retcode
= ERR_NO_PRIMARY
;
1649 if (!get_ldev(mdev
)) {
1650 retcode
= ERR_NO_DISK
;
1654 if (rs
.no_resync
&& mdev
->tconn
->agreed_pro_version
< 93) {
1655 retcode
= ERR_NEED_APV_93
;
1659 if (mdev
->ldev
->known_size
!= drbd_get_capacity(mdev
->ldev
->backing_bdev
))
1660 mdev
->ldev
->known_size
= drbd_get_capacity(mdev
->ldev
->backing_bdev
);
1662 mdev
->ldev
->dc
.disk_size
= (sector_t
)rs
.resize_size
;
1663 ddsf
= (rs
.resize_force
? DDSF_FORCED
: 0) | (rs
.no_resync
? DDSF_NO_RESYNC
: 0);
1664 dd
= drbd_determine_dev_size(mdev
, ddsf
);
1667 if (dd
== dev_size_error
) {
1668 retcode
= ERR_NOMEM_BITMAP
;
1672 if (mdev
->state
.conn
== C_CONNECTED
) {
1674 set_bit(RESIZE_PENDING
, &mdev
->flags
);
1676 drbd_send_uuids(mdev
);
1677 drbd_send_sizes(mdev
, 1, ddsf
);
1681 reply
->ret_code
= retcode
;
1685 static int drbd_nl_syncer_conf(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1686 struct drbd_nl_cfg_reply
*reply
)
1688 int retcode
= NO_ERROR
;
1690 int ovr
; /* online verify running */
1691 int rsr
; /* re-sync running */
1692 struct crypto_hash
*verify_tfm
= NULL
;
1693 struct crypto_hash
*csums_tfm
= NULL
;
1694 struct syncer_conf sc
;
1695 cpumask_var_t new_cpu_mask
;
1696 int *rs_plan_s
= NULL
;
1699 if (!zalloc_cpumask_var(&new_cpu_mask
, GFP_KERNEL
)) {
1700 retcode
= ERR_NOMEM
;
1704 if (nlp
->flags
& DRBD_NL_SET_DEFAULTS
) {
1705 memset(&sc
, 0, sizeof(struct syncer_conf
));
1706 sc
.rate
= DRBD_RATE_DEF
;
1707 sc
.after
= DRBD_AFTER_DEF
;
1708 sc
.al_extents
= DRBD_AL_EXTENTS_DEF
;
1709 sc
.on_no_data
= DRBD_ON_NO_DATA_DEF
;
1710 sc
.c_plan_ahead
= DRBD_C_PLAN_AHEAD_DEF
;
1711 sc
.c_delay_target
= DRBD_C_DELAY_TARGET_DEF
;
1712 sc
.c_fill_target
= DRBD_C_FILL_TARGET_DEF
;
1713 sc
.c_max_rate
= DRBD_C_MAX_RATE_DEF
;
1714 sc
.c_min_rate
= DRBD_C_MIN_RATE_DEF
;
1716 memcpy(&sc
, &mdev
->sync_conf
, sizeof(struct syncer_conf
));
1718 if (!syncer_conf_from_tags(nlp
->tag_list
, &sc
)) {
1719 retcode
= ERR_MANDATORY_TAG
;
1723 /* re-sync running */
1724 rsr
= ( mdev
->state
.conn
== C_SYNC_SOURCE
||
1725 mdev
->state
.conn
== C_SYNC_TARGET
||
1726 mdev
->state
.conn
== C_PAUSED_SYNC_S
||
1727 mdev
->state
.conn
== C_PAUSED_SYNC_T
);
1729 if (rsr
&& strcmp(sc
.csums_alg
, mdev
->sync_conf
.csums_alg
)) {
1730 retcode
= ERR_CSUMS_RESYNC_RUNNING
;
1734 if (!rsr
&& sc
.csums_alg
[0]) {
1735 csums_tfm
= crypto_alloc_hash(sc
.csums_alg
, 0, CRYPTO_ALG_ASYNC
);
1736 if (IS_ERR(csums_tfm
)) {
1738 retcode
= ERR_CSUMS_ALG
;
1742 if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm
))) {
1743 retcode
= ERR_CSUMS_ALG_ND
;
1748 /* online verify running */
1749 ovr
= (mdev
->state
.conn
== C_VERIFY_S
|| mdev
->state
.conn
== C_VERIFY_T
);
1752 if (strcmp(sc
.verify_alg
, mdev
->sync_conf
.verify_alg
)) {
1753 retcode
= ERR_VERIFY_RUNNING
;
1758 if (!ovr
&& sc
.verify_alg
[0]) {
1759 verify_tfm
= crypto_alloc_hash(sc
.verify_alg
, 0, CRYPTO_ALG_ASYNC
);
1760 if (IS_ERR(verify_tfm
)) {
1762 retcode
= ERR_VERIFY_ALG
;
1766 if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm
))) {
1767 retcode
= ERR_VERIFY_ALG_ND
;
1772 /* silently ignore cpu mask on UP kernel */
1773 if (nr_cpu_ids
> 1 && sc
.cpu_mask
[0] != 0) {
1774 err
= __bitmap_parse(sc
.cpu_mask
, 32, 0,
1775 cpumask_bits(new_cpu_mask
), nr_cpu_ids
);
1777 dev_warn(DEV
, "__bitmap_parse() failed with %d\n", err
);
1778 retcode
= ERR_CPU_MASK_PARSE
;
1783 if (!expect(sc
.rate
>= 1))
1786 /* clip to allowed range */
1787 if (!expect(sc
.al_extents
>= DRBD_AL_EXTENTS_MIN
))
1788 sc
.al_extents
= DRBD_AL_EXTENTS_MIN
;
1789 if (!expect(sc
.al_extents
<= DRBD_AL_EXTENTS_MAX
))
1790 sc
.al_extents
= DRBD_AL_EXTENTS_MAX
;
1792 /* to avoid spurious errors when configuring minors before configuring
1793 * the minors they depend on: if necessary, first create the minor we
1796 ensure_mdev(sc
.after
, 1);
1798 /* most sanity checks done, try to assign the new sync-after
1799 * dependency. need to hold the global lock in there,
1800 * to avoid a race in the dependency loop check. */
1801 retcode
= drbd_alter_sa(mdev
, sc
.after
);
1802 if (retcode
!= NO_ERROR
)
1805 fifo_size
= (sc
.c_plan_ahead
* 10 * SLEEP_TIME
) / HZ
;
1806 if (fifo_size
!= mdev
->rs_plan_s
.size
&& fifo_size
> 0) {
1807 rs_plan_s
= kzalloc(sizeof(int) * fifo_size
, GFP_KERNEL
);
1809 dev_err(DEV
, "kmalloc of fifo_buffer failed");
1810 retcode
= ERR_NOMEM
;
1815 /* ok, assign the rest of it as well.
1816 * lock against receive_SyncParam() */
1817 spin_lock(&mdev
->peer_seq_lock
);
1818 mdev
->sync_conf
= sc
;
1821 crypto_free_hash(mdev
->csums_tfm
);
1822 mdev
->csums_tfm
= csums_tfm
;
1827 crypto_free_hash(mdev
->verify_tfm
);
1828 mdev
->verify_tfm
= verify_tfm
;
1832 if (fifo_size
!= mdev
->rs_plan_s
.size
) {
1833 kfree(mdev
->rs_plan_s
.values
);
1834 mdev
->rs_plan_s
.values
= rs_plan_s
;
1835 mdev
->rs_plan_s
.size
= fifo_size
;
1836 mdev
->rs_planed
= 0;
1840 spin_unlock(&mdev
->peer_seq_lock
);
1842 if (get_ldev(mdev
)) {
1843 wait_event(mdev
->al_wait
, lc_try_lock(mdev
->act_log
));
1844 drbd_al_shrink(mdev
);
1845 err
= drbd_check_al_size(mdev
);
1846 lc_unlock(mdev
->act_log
);
1847 wake_up(&mdev
->al_wait
);
1853 retcode
= ERR_NOMEM
;
1858 if (mdev
->state
.conn
>= C_CONNECTED
)
1859 drbd_send_sync_param(mdev
, &sc
);
1861 if (!cpumask_equal(mdev
->tconn
->cpu_mask
, new_cpu_mask
)) {
1862 cpumask_copy(mdev
->tconn
->cpu_mask
, new_cpu_mask
);
1863 drbd_calc_cpu_mask(mdev
->tconn
);
1864 mdev
->tconn
->receiver
.reset_cpu_mask
= 1;
1865 mdev
->tconn
->asender
.reset_cpu_mask
= 1;
1866 mdev
->tconn
->worker
.reset_cpu_mask
= 1;
1869 kobject_uevent(&disk_to_dev(mdev
->vdisk
)->kobj
, KOBJ_CHANGE
);
1872 free_cpumask_var(new_cpu_mask
);
1873 crypto_free_hash(csums_tfm
);
1874 crypto_free_hash(verify_tfm
);
1875 reply
->ret_code
= retcode
;
1879 static int drbd_nl_invalidate(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1880 struct drbd_nl_cfg_reply
*reply
)
1884 /* If there is still bitmap IO pending, probably because of a previous
1885 * resync just being finished, wait for it before requesting a new resync. */
1886 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
1888 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
), CS_ORDERED
);
1890 if (retcode
< SS_SUCCESS
&& retcode
!= SS_NEED_CONNECTION
)
1891 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
1893 while (retcode
== SS_NEED_CONNECTION
) {
1894 spin_lock_irq(&mdev
->tconn
->req_lock
);
1895 if (mdev
->state
.conn
< C_CONNECTED
)
1896 retcode
= _drbd_set_state(_NS(mdev
, disk
, D_INCONSISTENT
), CS_VERBOSE
, NULL
);
1897 spin_unlock_irq(&mdev
->tconn
->req_lock
);
1899 if (retcode
!= SS_NEED_CONNECTION
)
1902 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_T
));
1905 reply
->ret_code
= retcode
;
1909 static int drbd_bmio_set_susp_al(struct drbd_conf
*mdev
)
1913 rv
= drbd_bmio_set_n_write(mdev
);
1914 drbd_suspend_al(mdev
);
1918 static int drbd_nl_invalidate_peer(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1919 struct drbd_nl_cfg_reply
*reply
)
1923 /* If there is still bitmap IO pending, probably because of a previous
1924 * resync just being finished, wait for it before requesting a new resync. */
1925 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
1927 retcode
= _drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
), CS_ORDERED
);
1929 if (retcode
< SS_SUCCESS
) {
1930 if (retcode
== SS_NEED_CONNECTION
&& mdev
->state
.role
== R_PRIMARY
) {
1931 /* The peer will get a resync upon connect anyways. Just make that
1932 into a full resync. */
1933 retcode
= drbd_request_state(mdev
, NS(pdsk
, D_INCONSISTENT
));
1934 if (retcode
>= SS_SUCCESS
) {
1935 if (drbd_bitmap_io(mdev
, &drbd_bmio_set_susp_al
,
1936 "set_n_write from invalidate_peer",
1937 BM_LOCKED_SET_ALLOWED
))
1938 retcode
= ERR_IO_MD_DISK
;
1941 retcode
= drbd_request_state(mdev
, NS(conn
, C_STARTING_SYNC_S
));
1944 reply
->ret_code
= retcode
;
1948 static int drbd_nl_pause_sync(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1949 struct drbd_nl_cfg_reply
*reply
)
1951 int retcode
= NO_ERROR
;
1953 if (drbd_request_state(mdev
, NS(user_isp
, 1)) == SS_NOTHING_TO_DO
)
1954 retcode
= ERR_PAUSE_IS_SET
;
1956 reply
->ret_code
= retcode
;
1960 static int drbd_nl_resume_sync(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1961 struct drbd_nl_cfg_reply
*reply
)
1963 int retcode
= NO_ERROR
;
1966 if (drbd_request_state(mdev
, NS(user_isp
, 0)) == SS_NOTHING_TO_DO
) {
1968 if (s
.conn
== C_PAUSED_SYNC_S
|| s
.conn
== C_PAUSED_SYNC_T
) {
1969 retcode
= s
.aftr_isp
? ERR_PIC_AFTER_DEP
:
1970 s
.peer_isp
? ERR_PIC_PEER_DEP
: ERR_PAUSE_IS_CLEAR
;
1972 retcode
= ERR_PAUSE_IS_CLEAR
;
1976 reply
->ret_code
= retcode
;
1980 static int drbd_nl_suspend_io(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1981 struct drbd_nl_cfg_reply
*reply
)
1983 reply
->ret_code
= drbd_request_state(mdev
, NS(susp
, 1));
1988 static int drbd_nl_resume_io(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
1989 struct drbd_nl_cfg_reply
*reply
)
1991 if (test_bit(NEW_CUR_UUID
, &mdev
->flags
)) {
1992 drbd_uuid_new_current(mdev
);
1993 clear_bit(NEW_CUR_UUID
, &mdev
->flags
);
1995 drbd_suspend_io(mdev
);
1996 reply
->ret_code
= drbd_request_state(mdev
, NS3(susp
, 0, susp_nod
, 0, susp_fen
, 0));
1997 if (reply
->ret_code
== SS_SUCCESS
) {
1998 if (mdev
->state
.conn
< C_CONNECTED
)
1999 tl_clear(mdev
->tconn
);
2000 if (mdev
->state
.disk
== D_DISKLESS
|| mdev
->state
.disk
== D_FAILED
)
2001 tl_restart(mdev
->tconn
, FAIL_FROZEN_DISK_IO
);
2003 drbd_resume_io(mdev
);
2008 static int drbd_nl_outdate(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2009 struct drbd_nl_cfg_reply
*reply
)
2011 reply
->ret_code
= drbd_request_state(mdev
, NS(disk
, D_OUTDATED
));
2015 static int drbd_nl_get_config(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2016 struct drbd_nl_cfg_reply
*reply
)
2020 tl
= reply
->tag_list
;
2022 if (get_ldev(mdev
)) {
2023 tl
= disk_conf_to_tags(&mdev
->ldev
->dc
, tl
);
2027 if (get_net_conf(mdev
->tconn
)) {
2028 tl
= net_conf_to_tags(mdev
->tconn
->net_conf
, tl
);
2029 put_net_conf(mdev
->tconn
);
2031 tl
= syncer_conf_to_tags(&mdev
->sync_conf
, tl
);
2033 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2035 return (int)((char *)tl
- (char *)reply
->tag_list
);
2038 static int drbd_nl_get_state(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2039 struct drbd_nl_cfg_reply
*reply
)
2041 unsigned short *tl
= reply
->tag_list
;
2042 union drbd_state s
= mdev
->state
;
2043 unsigned long rs_left
;
2046 tl
= get_state_to_tags((struct get_state
*)&s
, tl
);
2048 /* no local ref, no bitmap, no syncer progress. */
2049 if (s
.conn
>= C_SYNC_SOURCE
&& s
.conn
<= C_PAUSED_SYNC_T
) {
2050 if (get_ldev(mdev
)) {
2051 drbd_get_syncer_progress(mdev
, &rs_left
, &res
);
2052 tl
= tl_add_int(tl
, T_sync_progress
, &res
);
2056 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2058 return (int)((char *)tl
- (char *)reply
->tag_list
);
2061 static int drbd_nl_get_uuids(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2062 struct drbd_nl_cfg_reply
*reply
)
2066 tl
= reply
->tag_list
;
2068 if (get_ldev(mdev
)) {
2069 tl
= tl_add_blob(tl
, T_uuids
, mdev
->ldev
->md
.uuid
, UI_SIZE
*sizeof(u64
));
2070 tl
= tl_add_int(tl
, T_uuids_flags
, &mdev
->ldev
->md
.flags
);
2073 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2075 return (int)((char *)tl
- (char *)reply
->tag_list
);
2079 * drbd_nl_get_timeout_flag() - Used by drbdsetup to find out which timeout value to use
2080 * @mdev: DRBD device.
2081 * @nlp: Netlink/connector packet from drbdsetup
2082 * @reply: Reply packet for drbdsetup
2084 static int drbd_nl_get_timeout_flag(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2085 struct drbd_nl_cfg_reply
*reply
)
2090 tl
= reply
->tag_list
;
2092 rv
= mdev
->state
.pdsk
== D_OUTDATED
? UT_PEER_OUTDATED
:
2093 test_bit(USE_DEGR_WFC_T
, &mdev
->flags
) ? UT_DEGRADED
: UT_DEFAULT
;
2095 tl
= tl_add_blob(tl
, T_use_degraded
, &rv
, sizeof(rv
));
2096 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2098 return (int)((char *)tl
- (char *)reply
->tag_list
);
2101 static int drbd_nl_start_ov(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2102 struct drbd_nl_cfg_reply
*reply
)
2104 /* default to resume from last known position, if possible */
2105 struct start_ov args
=
2106 { .start_sector
= mdev
->ov_start_sector
};
2108 if (!start_ov_from_tags(nlp
->tag_list
, &args
)) {
2109 reply
->ret_code
= ERR_MANDATORY_TAG
;
2113 /* If there is still bitmap IO pending, e.g. previous resync or verify
2114 * just being finished, wait for it before requesting a new resync. */
2115 wait_event(mdev
->misc_wait
, !test_bit(BITMAP_IO
, &mdev
->flags
));
2117 /* w_make_ov_request expects position to be aligned */
2118 mdev
->ov_start_sector
= args
.start_sector
& ~BM_SECT_PER_BIT
;
2119 reply
->ret_code
= drbd_request_state(mdev
,NS(conn
,C_VERIFY_S
));
2124 static int drbd_nl_new_c_uuid(struct drbd_conf
*mdev
, struct drbd_nl_cfg_req
*nlp
,
2125 struct drbd_nl_cfg_reply
*reply
)
2127 int retcode
= NO_ERROR
;
2128 int skip_initial_sync
= 0;
2131 struct new_c_uuid args
;
2133 memset(&args
, 0, sizeof(struct new_c_uuid
));
2134 if (!new_c_uuid_from_tags(nlp
->tag_list
, &args
)) {
2135 reply
->ret_code
= ERR_MANDATORY_TAG
;
2139 mutex_lock(mdev
->state_mutex
); /* Protects us against serialized state changes. */
2141 if (!get_ldev(mdev
)) {
2142 retcode
= ERR_NO_DISK
;
2146 /* this is "skip initial sync", assume to be clean */
2147 if (mdev
->state
.conn
== C_CONNECTED
&& mdev
->tconn
->agreed_pro_version
>= 90 &&
2148 mdev
->ldev
->md
.uuid
[UI_CURRENT
] == UUID_JUST_CREATED
&& args
.clear_bm
) {
2149 dev_info(DEV
, "Preparing to skip initial sync\n");
2150 skip_initial_sync
= 1;
2151 } else if (mdev
->state
.conn
!= C_STANDALONE
) {
2152 retcode
= ERR_CONNECTED
;
2156 drbd_uuid_set(mdev
, UI_BITMAP
, 0); /* Rotate UI_BITMAP to History 1, etc... */
2157 drbd_uuid_new_current(mdev
); /* New current, previous to UI_BITMAP */
2159 if (args
.clear_bm
) {
2160 err
= drbd_bitmap_io(mdev
, &drbd_bmio_clear_n_write
,
2161 "clear_n_write from new_c_uuid", BM_LOCKED_MASK
);
2163 dev_err(DEV
, "Writing bitmap failed with %d\n",err
);
2164 retcode
= ERR_IO_MD_DISK
;
2166 if (skip_initial_sync
) {
2167 drbd_send_uuids_skip_initial_sync(mdev
);
2168 _drbd_uuid_set(mdev
, UI_BITMAP
, 0);
2169 drbd_print_uuids(mdev
, "cleared bitmap UUID");
2170 spin_lock_irq(&mdev
->tconn
->req_lock
);
2171 _drbd_set_state(_NS2(mdev
, disk
, D_UP_TO_DATE
, pdsk
, D_UP_TO_DATE
),
2173 spin_unlock_irq(&mdev
->tconn
->req_lock
);
2181 mutex_unlock(mdev
->state_mutex
);
2183 reply
->ret_code
= retcode
;
2187 enum cn_handler_type
{
2191 /* CHT_RES, later */
2194 struct cn_handler_struct
{
2195 enum cn_handler_type type
;
2197 int (*minor_based
)(struct drbd_conf
*,
2198 struct drbd_nl_cfg_req
*,
2199 struct drbd_nl_cfg_reply
*);
2200 int (*conn_based
)(struct drbd_tconn
*,
2201 struct drbd_nl_cfg_req
*,
2202 struct drbd_nl_cfg_reply
*);
2203 int (*constructor
)(struct drbd_nl_cfg_req
*,
2204 struct drbd_nl_cfg_reply
*);
2206 int reply_body_size
;
2209 static struct cn_handler_struct cnd_table
[] = {
2210 [ P_primary
] = { CHT_MINOR
, { &drbd_nl_primary
}, 0 },
2211 [ P_secondary
] = { CHT_MINOR
, { &drbd_nl_secondary
}, 0 },
2212 [ P_disk_conf
] = { CHT_MINOR
, { &drbd_nl_disk_conf
}, 0 },
2213 [ P_detach
] = { CHT_MINOR
, { &drbd_nl_detach
}, 0 },
2214 [ P_net_conf
] = { CHT_CONN
, { .conn_based
= &drbd_nl_net_conf
}, 0 },
2215 [ P_disconnect
] = { CHT_CONN
, { .conn_based
= &drbd_nl_disconnect
}, 0 },
2216 [ P_resize
] = { CHT_MINOR
, { &drbd_nl_resize
}, 0 },
2217 [ P_syncer_conf
] = { CHT_MINOR
, { &drbd_nl_syncer_conf
},0 },
2218 [ P_invalidate
] = { CHT_MINOR
, { &drbd_nl_invalidate
}, 0 },
2219 [ P_invalidate_peer
] = { CHT_MINOR
, { &drbd_nl_invalidate_peer
},0 },
2220 [ P_pause_sync
] = { CHT_MINOR
, { &drbd_nl_pause_sync
}, 0 },
2221 [ P_resume_sync
] = { CHT_MINOR
, { &drbd_nl_resume_sync
},0 },
2222 [ P_suspend_io
] = { CHT_MINOR
, { &drbd_nl_suspend_io
}, 0 },
2223 [ P_resume_io
] = { CHT_MINOR
, { &drbd_nl_resume_io
}, 0 },
2224 [ P_outdate
] = { CHT_MINOR
, { &drbd_nl_outdate
}, 0 },
2225 [ P_get_config
] = { CHT_MINOR
, { &drbd_nl_get_config
},
2226 sizeof(struct syncer_conf_tag_len_struct
) +
2227 sizeof(struct disk_conf_tag_len_struct
) +
2228 sizeof(struct net_conf_tag_len_struct
) },
2229 [ P_get_state
] = { CHT_MINOR
, { &drbd_nl_get_state
},
2230 sizeof(struct get_state_tag_len_struct
) +
2231 sizeof(struct sync_progress_tag_len_struct
) },
2232 [ P_get_uuids
] = { CHT_MINOR
, { &drbd_nl_get_uuids
},
2233 sizeof(struct get_uuids_tag_len_struct
) },
2234 [ P_get_timeout_flag
] = { CHT_MINOR
, { &drbd_nl_get_timeout_flag
},
2235 sizeof(struct get_timeout_flag_tag_len_struct
)},
2236 [ P_start_ov
] = { CHT_MINOR
, { &drbd_nl_start_ov
}, 0 },
2237 [ P_new_c_uuid
] = { CHT_MINOR
, { &drbd_nl_new_c_uuid
}, 0 },
2240 static void drbd_connector_callback(struct cn_msg
*req
, struct netlink_skb_parms
*nsp
)
2242 struct drbd_nl_cfg_req
*nlp
= (struct drbd_nl_cfg_req
*)req
->data
;
2243 struct cn_handler_struct
*cm
;
2244 struct cn_msg
*cn_reply
;
2245 struct drbd_nl_cfg_reply
*reply
;
2246 struct drbd_conf
*mdev
;
2247 struct drbd_tconn
*tconn
;
2249 int reply_size
= sizeof(struct cn_msg
)
2250 + sizeof(struct drbd_nl_cfg_reply
)
2251 + sizeof(short int);
2253 if (!try_module_get(THIS_MODULE
)) {
2254 printk(KERN_ERR
"drbd: try_module_get() failed!\n");
2258 if (!cap_raised(current_cap(), CAP_SYS_ADMIN
)) {
2263 if (nlp
->packet_type
>= P_nl_after_last_packet
||
2264 nlp
->packet_type
== P_return_code_only
) {
2265 retcode
= ERR_PACKET_NR
;
2269 cm
= cnd_table
+ nlp
->packet_type
;
2271 /* This may happen if packet number is 0: */
2272 if (cm
->minor_based
== NULL
) {
2273 retcode
= ERR_PACKET_NR
;
2277 reply_size
+= cm
->reply_body_size
;
2279 /* allocation not in the IO path, cqueue thread context */
2280 cn_reply
= kzalloc(reply_size
, GFP_KERNEL
);
2282 retcode
= ERR_NOMEM
;
2285 reply
= (struct drbd_nl_cfg_reply
*) cn_reply
->data
;
2287 reply
->packet_type
=
2288 cm
->reply_body_size
? nlp
->packet_type
: P_return_code_only
;
2289 reply
->minor
= nlp
->drbd_minor
;
2290 reply
->ret_code
= NO_ERROR
; /* Might by modified by cm->function. */
2291 /* reply->tag_list; might be modified by cm->function. */
2293 retcode
= ERR_MINOR_INVALID
;
2297 mdev
= minor_to_mdev(nlp
->drbd_minor
);
2300 rr
= cm
->minor_based(mdev
, nlp
, reply
);
2303 tconn
= conn_by_name(nlp
->obj_name
);
2305 retcode
= ERR_CONN_NOT_KNOWN
;
2308 rr
= cm
->conn_based(tconn
, nlp
, reply
);
2311 rr
= cm
->constructor(nlp
, reply
);
2316 cn_reply
->id
= req
->id
;
2317 cn_reply
->seq
= req
->seq
;
2318 cn_reply
->ack
= req
->ack
+ 1;
2319 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) + rr
;
2320 cn_reply
->flags
= 0;
2322 rr
= cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_KERNEL
);
2323 if (rr
&& rr
!= -ESRCH
)
2324 printk(KERN_INFO
"drbd: cn_netlink_send()=%d\n", rr
);
2327 module_put(THIS_MODULE
);
2330 drbd_nl_send_reply(req
, retcode
);
2331 module_put(THIS_MODULE
);
2334 static atomic_t drbd_nl_seq
= ATOMIC_INIT(2); /* two. */
2336 static unsigned short *
2337 __tl_add_blob(unsigned short *tl
, enum drbd_tags tag
, const void *data
,
2338 unsigned short len
, int nul_terminated
)
2340 unsigned short l
= tag_descriptions
[tag_number(tag
)].max_len
;
2341 len
= (len
< l
) ? len
: l
;
2342 put_unaligned(tag
, tl
++);
2343 put_unaligned(len
, tl
++);
2344 memcpy(tl
, data
, len
);
2345 tl
= (unsigned short*)((char*)tl
+ len
);
2347 *((char*)tl
- 1) = 0;
2351 static unsigned short *
2352 tl_add_blob(unsigned short *tl
, enum drbd_tags tag
, const void *data
, int len
)
2354 return __tl_add_blob(tl
, tag
, data
, len
, 0);
2357 static unsigned short *
2358 tl_add_str(unsigned short *tl
, enum drbd_tags tag
, const char *str
)
2360 return __tl_add_blob(tl
, tag
, str
, strlen(str
)+1, 0);
2363 static unsigned short *
2364 tl_add_int(unsigned short *tl
, enum drbd_tags tag
, const void *val
)
2366 put_unaligned(tag
, tl
++);
2367 switch(tag_type(tag
)) {
2369 put_unaligned(sizeof(int), tl
++);
2370 put_unaligned(*(int *)val
, (int *)tl
);
2371 tl
= (unsigned short*)((char*)tl
+sizeof(int));
2374 put_unaligned(sizeof(u64
), tl
++);
2375 put_unaligned(*(u64
*)val
, (u64
*)tl
);
2376 tl
= (unsigned short*)((char*)tl
+sizeof(u64
));
2379 /* someone did something stupid. */
2385 void drbd_bcast_state(struct drbd_conf
*mdev
, union drbd_state state
)
2387 char buffer
[sizeof(struct cn_msg
)+
2388 sizeof(struct drbd_nl_cfg_reply
)+
2389 sizeof(struct get_state_tag_len_struct
)+
2391 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2392 struct drbd_nl_cfg_reply
*reply
=
2393 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2394 unsigned short *tl
= reply
->tag_list
;
2396 /* dev_warn(DEV, "drbd_bcast_state() got called\n"); */
2398 tl
= get_state_to_tags((struct get_state
*)&state
, tl
);
2400 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2402 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2403 cn_reply
->id
.val
= CN_VAL_DRBD
;
2405 cn_reply
->seq
= atomic_inc_return(&drbd_nl_seq
);
2406 cn_reply
->ack
= 0; /* not used here. */
2407 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2408 (int)((char *)tl
- (char *)reply
->tag_list
);
2409 cn_reply
->flags
= 0;
2411 reply
->packet_type
= P_get_state
;
2412 reply
->minor
= mdev_to_minor(mdev
);
2413 reply
->ret_code
= NO_ERROR
;
2415 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2418 void drbd_bcast_ev_helper(struct drbd_conf
*mdev
, char *helper_name
)
2420 char buffer
[sizeof(struct cn_msg
)+
2421 sizeof(struct drbd_nl_cfg_reply
)+
2422 sizeof(struct call_helper_tag_len_struct
)+
2424 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2425 struct drbd_nl_cfg_reply
*reply
=
2426 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2427 unsigned short *tl
= reply
->tag_list
;
2429 /* dev_warn(DEV, "drbd_bcast_state() got called\n"); */
2431 tl
= tl_add_str(tl
, T_helper
, helper_name
);
2432 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2434 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2435 cn_reply
->id
.val
= CN_VAL_DRBD
;
2437 cn_reply
->seq
= atomic_inc_return(&drbd_nl_seq
);
2438 cn_reply
->ack
= 0; /* not used here. */
2439 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2440 (int)((char *)tl
- (char *)reply
->tag_list
);
2441 cn_reply
->flags
= 0;
2443 reply
->packet_type
= P_call_helper
;
2444 reply
->minor
= mdev_to_minor(mdev
);
2445 reply
->ret_code
= NO_ERROR
;
2447 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2450 void drbd_bcast_ee(struct drbd_conf
*mdev
, const char *reason
, const int dgs
,
2451 const char *seen_hash
, const char *calc_hash
,
2452 const struct drbd_peer_request
*peer_req
)
2454 struct cn_msg
*cn_reply
;
2455 struct drbd_nl_cfg_reply
*reply
;
2462 if (!reason
|| !reason
[0])
2465 /* apparently we have to memcpy twice, first to prepare the data for the
2466 * struct cn_msg, then within cn_netlink_send from the cn_msg to the
2468 /* receiver thread context, which is not in the writeout path (of this node),
2469 * but may be in the writeout path of the _other_ node.
2470 * GFP_NOIO to avoid potential "distributed deadlock". */
2472 sizeof(struct cn_msg
)+
2473 sizeof(struct drbd_nl_cfg_reply
)+
2474 sizeof(struct dump_ee_tag_len_struct
)+
2479 dev_err(DEV
, "could not kmalloc buffer for drbd_bcast_ee, "
2480 "sector %llu, size %u\n",
2481 (unsigned long long)peer_req
->i
.sector
,
2486 reply
= (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2487 tl
= reply
->tag_list
;
2489 tl
= tl_add_str(tl
, T_dump_ee_reason
, reason
);
2490 tl
= tl_add_blob(tl
, T_seen_digest
, seen_hash
, dgs
);
2491 tl
= tl_add_blob(tl
, T_calc_digest
, calc_hash
, dgs
);
2492 tl
= tl_add_int(tl
, T_ee_sector
, &peer_req
->i
.sector
);
2493 tl
= tl_add_int(tl
, T_ee_block_id
, &peer_req
->block_id
);
2495 /* dump the first 32k */
2496 len
= min_t(unsigned, peer_req
->i
.size
, 32 << 10);
2497 put_unaligned(T_ee_data
, tl
++);
2498 put_unaligned(len
, tl
++);
2500 page
= peer_req
->pages
;
2501 page_chain_for_each(page
) {
2502 void *d
= kmap_atomic(page
, KM_USER0
);
2503 unsigned l
= min_t(unsigned, len
, PAGE_SIZE
);
2505 kunmap_atomic(d
, KM_USER0
);
2506 tl
= (unsigned short*)((char*)tl
+ l
);
2511 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2513 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2514 cn_reply
->id
.val
= CN_VAL_DRBD
;
2516 cn_reply
->seq
= atomic_inc_return(&drbd_nl_seq
);
2517 cn_reply
->ack
= 0; // not used here.
2518 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2519 (int)((char*)tl
- (char*)reply
->tag_list
);
2520 cn_reply
->flags
= 0;
2522 reply
->packet_type
= P_dump_ee
;
2523 reply
->minor
= mdev_to_minor(mdev
);
2524 reply
->ret_code
= NO_ERROR
;
2526 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2530 void drbd_bcast_sync_progress(struct drbd_conf
*mdev
)
2532 char buffer
[sizeof(struct cn_msg
)+
2533 sizeof(struct drbd_nl_cfg_reply
)+
2534 sizeof(struct sync_progress_tag_len_struct
)+
2536 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2537 struct drbd_nl_cfg_reply
*reply
=
2538 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2539 unsigned short *tl
= reply
->tag_list
;
2540 unsigned long rs_left
;
2543 /* no local ref, no bitmap, no syncer progress, no broadcast. */
2544 if (!get_ldev(mdev
))
2546 drbd_get_syncer_progress(mdev
, &rs_left
, &res
);
2549 tl
= tl_add_int(tl
, T_sync_progress
, &res
);
2550 put_unaligned(TT_END
, tl
++); /* Close the tag list */
2552 cn_reply
->id
.idx
= CN_IDX_DRBD
;
2553 cn_reply
->id
.val
= CN_VAL_DRBD
;
2555 cn_reply
->seq
= atomic_inc_return(&drbd_nl_seq
);
2556 cn_reply
->ack
= 0; /* not used here. */
2557 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
) +
2558 (int)((char *)tl
- (char *)reply
->tag_list
);
2559 cn_reply
->flags
= 0;
2561 reply
->packet_type
= P_sync_progress
;
2562 reply
->minor
= mdev_to_minor(mdev
);
2563 reply
->ret_code
= NO_ERROR
;
2565 cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2568 int __init
drbd_nl_init(void)
2570 static struct cb_id cn_id_drbd
;
2573 cn_id_drbd
.val
= CN_VAL_DRBD
;
2575 cn_id_drbd
.idx
= cn_idx
;
2576 err
= cn_add_callback(&cn_id_drbd
, "cn_drbd", &drbd_connector_callback
);
2579 cn_idx
= (cn_idx
+ CN_IDX_STEP
);
2583 printk(KERN_ERR
"drbd: cn_drbd failed to register\n");
2590 void drbd_nl_cleanup(void)
2592 static struct cb_id cn_id_drbd
;
2594 cn_id_drbd
.idx
= cn_idx
;
2595 cn_id_drbd
.val
= CN_VAL_DRBD
;
2597 cn_del_callback(&cn_id_drbd
);
2600 void drbd_nl_send_reply(struct cn_msg
*req
, int ret_code
)
2602 char buffer
[sizeof(struct cn_msg
)+sizeof(struct drbd_nl_cfg_reply
)];
2603 struct cn_msg
*cn_reply
= (struct cn_msg
*) buffer
;
2604 struct drbd_nl_cfg_reply
*reply
=
2605 (struct drbd_nl_cfg_reply
*)cn_reply
->data
;
2608 memset(buffer
, 0, sizeof(buffer
));
2609 cn_reply
->id
= req
->id
;
2611 cn_reply
->seq
= req
->seq
;
2612 cn_reply
->ack
= req
->ack
+ 1;
2613 cn_reply
->len
= sizeof(struct drbd_nl_cfg_reply
);
2614 cn_reply
->flags
= 0;
2616 reply
->packet_type
= P_return_code_only
;
2617 reply
->minor
= ((struct drbd_nl_cfg_req
*)req
->data
)->drbd_minor
;
2618 reply
->ret_code
= ret_code
;
2620 rr
= cn_netlink_send(cn_reply
, CN_IDX_DRBD
, GFP_NOIO
);
2621 if (rr
&& rr
!= -ESRCH
)
2622 printk(KERN_INFO
"drbd: cn_netlink_send()=%d\n", rr
);