2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com> and
6 * Michael Neumann <mneumann@ntecs.de>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 hammer_format_volume_header(hammer_mount_t hmp
,
41 struct hammer_ioc_volume
*ioc
,
42 hammer_volume_ondisk_t ondisk
,
46 hammer_update_volumes_header(hammer_transaction_t trans
,
47 int64_t total_bigblocks
, int64_t empty_bigblocks
);
50 hammer_do_reblock(hammer_transaction_t trans
, hammer_inode_t ip
);
53 hammer_format_freemap(hammer_transaction_t trans
, hammer_volume_t volume
);
56 hammer_free_freemap(hammer_transaction_t trans
, hammer_volume_t volume
);
59 hammer_count_bigblocks(hammer_mount_t hmp
, hammer_volume_t volume
,
60 int64_t *total_bigblocks
, int64_t *empty_bigblocks
);
63 hammer_ioc_volume_add(hammer_transaction_t trans
, hammer_inode_t ip
,
64 struct hammer_ioc_volume
*ioc
)
66 hammer_mount_t hmp
= trans
->hmp
;
67 struct mount
*mp
= hmp
->mp
;
68 struct hammer_volume_ondisk ondisk
;
69 hammer_volume_t volume
;
70 int64_t total_bigblocks
, empty_bigblocks
;
74 if (mp
->mnt_flag
& MNT_RDONLY
) {
75 hmkprintf(hmp
, "Cannot add volume to read-only HAMMER filesystem\n");
79 if (hammer_lock_ex_try(&hmp
->volume_lock
) != 0) {
80 hmkprintf(hmp
, "Another volume operation is in progress!\n");
84 if (hmp
->nvolumes
>= HAMMER_MAX_VOLUMES
) {
85 hammer_unlock(&hmp
->volume_lock
);
86 hmkprintf(hmp
, "Max number of HAMMER volumes exceeded\n");
91 * Find an unused volume number.
93 while (free_vol_no
< HAMMER_MAX_VOLUMES
&&
94 hammer_volume_number_test(hmp
, free_vol_no
)) {
97 if (free_vol_no
>= HAMMER_MAX_VOLUMES
) {
98 hmkprintf(hmp
, "Max number of HAMMER volumes exceeded\n");
103 error
= hammer_format_volume_header(hmp
, ioc
, &ondisk
, free_vol_no
);
107 error
= hammer_install_volume(hmp
, ioc
->device_name
, NULL
, &ondisk
);
111 hammer_sync_lock_sh(trans
);
112 hammer_lock_ex(&hmp
->blkmap_lock
);
114 volume
= hammer_get_volume(hmp
, free_vol_no
, &error
);
115 KKASSERT(volume
!= NULL
&& error
== 0);
117 error
= hammer_format_freemap(trans
, volume
);
118 KKASSERT(error
== 0);
120 error
= hammer_count_bigblocks(hmp
, volume
,
121 &total_bigblocks
, &empty_bigblocks
);
122 KKASSERT(error
== 0);
123 KKASSERT(total_bigblocks
== empty_bigblocks
);
125 hammer_rel_volume(volume
, 0);
128 error
= hammer_update_volumes_header(trans
,
129 total_bigblocks
, empty_bigblocks
);
130 KKASSERT(error
== 0);
132 hammer_unlock(&hmp
->blkmap_lock
);
133 hammer_sync_unlock(trans
);
135 KKASSERT(error
== 0);
137 hammer_unlock(&hmp
->volume_lock
);
139 hmkprintf(hmp
, "An error occurred: %d\n", error
);
148 hammer_ioc_volume_del(hammer_transaction_t trans
, hammer_inode_t ip
,
149 struct hammer_ioc_volume
*ioc
)
151 hammer_mount_t hmp
= trans
->hmp
;
152 struct mount
*mp
= hmp
->mp
;
153 struct hammer_volume_ondisk ondisk
;
154 hammer_volume_t volume
;
155 int64_t total_bigblocks
, empty_bigblocks
;
159 if (mp
->mnt_flag
& MNT_RDONLY
) {
160 hmkprintf(hmp
, "Cannot del volume from read-only HAMMER filesystem\n");
164 if (hammer_lock_ex_try(&hmp
->volume_lock
) != 0) {
165 hmkprintf(hmp
, "Another volume operation is in progress!\n");
169 if (hmp
->nvolumes
<= 1) {
170 hammer_unlock(&hmp
->volume_lock
);
171 hmkprintf(hmp
, "No HAMMER volume to delete\n");
176 * find volume by volname
179 HAMMER_VOLUME_NUMBER_FOREACH(hmp
, vol_no
) {
180 volume
= hammer_get_volume(hmp
, vol_no
, &error
);
181 KKASSERT(volume
!= NULL
&& error
== 0);
182 if (strcmp(volume
->vol_name
, ioc
->device_name
) == 0) {
185 hammer_rel_volume(volume
, 0);
189 if (volume
== NULL
) {
190 hmkprintf(hmp
, "Couldn't find volume\n");
195 if (volume
== trans
->rootvol
) {
196 hmkprintf(hmp
, "Cannot remove root-volume\n");
197 hammer_rel_volume(volume
, 0);
203 * Reblock filesystem if the volume is not empty
205 hmp
->volume_to_remove
= volume
->vol_no
;
207 error
= hammer_count_bigblocks(hmp
, volume
,
208 &total_bigblocks
, &empty_bigblocks
);
209 KKASSERT(error
== 0);
211 if (total_bigblocks
== empty_bigblocks
) {
212 hmkprintf(hmp
, "%s is already empty\n", volume
->vol_name
);
213 } else if (ioc
->flag
& HAMMER_IOC_VOLUME_REBLOCK
) {
214 error
= hammer_do_reblock(trans
, ip
);
216 hmp
->volume_to_remove
= -1;
217 hammer_rel_volume(volume
, 0);
221 hmkprintf(hmp
, "%s is not empty\n", volume
->vol_name
);
222 hammer_rel_volume(volume
, 0);
227 hammer_sync_lock_sh(trans
);
228 hammer_lock_ex(&hmp
->blkmap_lock
);
230 error
= hammer_count_bigblocks(hmp
, volume
,
231 &total_bigblocks
, &empty_bigblocks
);
232 KKASSERT(error
== 0);
234 error
= hammer_free_freemap(trans
, volume
);
236 hmkprintf(hmp
, "Failed to free volume: ");
238 kprintf("Volume %d not empty\n", volume
->vol_no
);
240 kprintf("%d\n", error
);
241 hmp
->volume_to_remove
= -1;
242 hammer_rel_volume(volume
, 0);
245 hammer_rel_volume(volume
, 0);
248 * XXX: Temporary solution for
249 * http://lists.dragonflybsd.org/pipermail/kernel/2015-August/175027.html
251 hammer_unlock(&hmp
->blkmap_lock
);
252 hammer_sync_unlock(trans
);
253 hammer_flusher_sync(hmp
); /* 1 */
254 hammer_flusher_sync(hmp
); /* 2 */
255 hammer_flusher_sync(hmp
); /* 3 */
256 hammer_sync_lock_sh(trans
);
257 hammer_lock_ex(&hmp
->blkmap_lock
);
262 RB_SCAN(hammer_buf_rb_tree
, &hmp
->rb_bufs_root
, NULL
,
263 hammer_unload_buffer
, volume
);
265 bzero(&ondisk
, sizeof(ondisk
));
266 error
= hammer_unload_volume(volume
, &ondisk
);
268 hmkprintf(hmp
, "Failed to unload volume\n");
273 error
= hammer_update_volumes_header(trans
,
274 -total_bigblocks
, -empty_bigblocks
);
275 KKASSERT(error
== 0);
276 hmp
->volume_to_remove
= -1;
279 hammer_unlock(&hmp
->blkmap_lock
);
280 hammer_sync_unlock(trans
);
283 hammer_unlock(&hmp
->volume_lock
);
285 hmkprintf(hmp
, "An error occurred: %d\n", error
);
291 hammer_ioc_volume_list(hammer_transaction_t trans
, hammer_inode_t ip
,
292 struct hammer_ioc_volume_list
*ioc
)
294 hammer_mount_t hmp
= trans
->hmp
;
295 hammer_volume_t volume
;
299 if (hammer_lock_ex_try(&hmp
->volume_lock
) != 0) {
300 hmkprintf(hmp
, "Another volume operation is in progress!\n");
304 HAMMER_VOLUME_NUMBER_FOREACH(hmp
, i
) {
305 if (cnt
>= ioc
->nvols
)
307 volume
= hammer_get_volume(hmp
, i
, &error
);
308 KKASSERT(volume
!= NULL
&& error
== 0);
310 len
= strlen(volume
->vol_name
) + 1;
311 KKASSERT(len
<= MAXPATHLEN
);
313 ioc
->vols
[cnt
].vol_no
= volume
->vol_no
;
314 error
= copyout(volume
->vol_name
, ioc
->vols
[cnt
].device_name
,
316 hammer_rel_volume(volume
, 0);
324 hammer_unlock(&hmp
->volume_lock
);
330 hammer_do_reblock(hammer_transaction_t trans
, hammer_inode_t ip
)
332 hammer_mount_t hmp
= trans
->hmp
;
336 struct hammer_ioc_reblock reblock
;
337 bzero(&reblock
, sizeof(reblock
));
339 vol_no
= trans
->hmp
->volume_to_remove
;
340 KKASSERT(vol_no
!= -1);
342 reblock
.key_beg
.localization
= HAMMER_MIN_LOCALIZATION
;
343 reblock
.key_beg
.obj_id
= HAMMER_MIN_OBJID
;
344 reblock
.key_end
.localization
= HAMMER_MAX_LOCALIZATION
;
345 reblock
.key_end
.obj_id
= HAMMER_MAX_OBJID
;
346 reblock
.head
.flags
= HAMMER_IOC_DO_FLAGS
;
347 reblock
.free_level
= 0; /* reblock all big-blocks */
348 reblock
.allpfs
= 1; /* reblock all PFS */
349 reblock
.vol_no
= vol_no
;
351 hmkprintf(hmp
, "reblock started\n");
352 error
= hammer_ioc_reblock(trans
, ip
, &reblock
);
354 if (reblock
.head
.flags
& HAMMER_IOC_HEAD_INTR
) {
359 if (error
== EINTR
) {
360 hmkprintf(hmp
, "reblock was interrupted\n");
362 hmkprintf(hmp
, "reblock failed: %d\n", error
);
371 * XXX This somehow needs to stop doing hammer_modify_buffer() for
372 * layer2 entries. In theory adding a large block device could
373 * blow away UNDO fifo. The best way is to format layer2 entries
374 * in userspace without UNDO getting involved before the device is
375 * safely added to the filesystem. HAMMER has no interest in what
376 * has happened to the device before it safely joins the filesystem.
379 hammer_format_freemap(hammer_transaction_t trans
, hammer_volume_t volume
)
381 hammer_mount_t hmp
= trans
->hmp
;
382 hammer_volume_ondisk_t ondisk
;
383 hammer_blockmap_t freemap
;
384 hammer_off_t alloc_offset
;
385 hammer_off_t phys_offset
;
386 hammer_off_t block_offset
;
387 hammer_off_t layer1_offset
;
388 hammer_off_t layer2_offset
;
389 hammer_off_t vol_free_end
;
390 hammer_off_t aligned_vol_free_end
;
391 hammer_blockmap_layer1_t layer1
;
392 hammer_blockmap_layer2_t layer2
;
393 hammer_buffer_t buffer1
= NULL
;
394 hammer_buffer_t buffer2
= NULL
;
395 int64_t vol_buf_size
;
396 int64_t layer1_count
= 0;
399 KKASSERT(volume
->vol_no
!= HAMMER_ROOT_VOLNO
);
401 ondisk
= volume
->ondisk
;
402 vol_buf_size
= HAMMER_VOL_BUF_SIZE(ondisk
);
403 KKASSERT((vol_buf_size
& ~HAMMER_OFF_SHORT_MASK
) == 0);
404 vol_free_end
= HAMMER_ENCODE_RAW_BUFFER(ondisk
->vol_no
,
405 vol_buf_size
& ~HAMMER_BIGBLOCK_MASK64
);
406 aligned_vol_free_end
= HAMMER_BLOCKMAP_LAYER2_DOALIGN(vol_free_end
);
408 freemap
= &hmp
->blockmap
[HAMMER_ZONE_FREEMAP_INDEX
];
409 alloc_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
411 hmkprintf(hmp
, "Initialize freemap volume %d\n", volume
->vol_no
);
413 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
414 phys_offset
< aligned_vol_free_end
;
415 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
416 layer1_offset
= freemap
->phys_offset
+
417 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
418 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
421 if (layer1
->phys_offset
== HAMMER_BLOCKMAP_UNAVAIL
) {
422 hammer_modify_buffer(trans
, buffer1
, layer1
, sizeof(*layer1
));
423 bzero(layer1
, sizeof(*layer1
));
424 layer1
->phys_offset
= alloc_offset
;
425 layer1
->blocks_free
= 0;
426 hammer_crc_set_layer1(layer1
);
427 hammer_modify_buffer_done(buffer1
);
428 alloc_offset
+= HAMMER_BIGBLOCK_SIZE
;
432 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
433 phys_offset
< aligned_vol_free_end
;
434 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
436 layer1_offset
= freemap
->phys_offset
+
437 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
438 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
441 KKASSERT(layer1
->phys_offset
!= HAMMER_BLOCKMAP_UNAVAIL
);
443 for (block_offset
= 0;
444 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
445 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
446 layer2_offset
= layer1
->phys_offset
+
447 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
448 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
452 hammer_modify_buffer(trans
, buffer2
, layer2
, sizeof(*layer2
));
453 bzero(layer2
, sizeof(*layer2
));
455 if (phys_offset
+ block_offset
< alloc_offset
) {
456 layer2
->zone
= HAMMER_ZONE_FREEMAP_INDEX
;
457 layer2
->append_off
= HAMMER_BIGBLOCK_SIZE
;
458 layer2
->bytes_free
= 0;
459 } else if (phys_offset
+ block_offset
< vol_free_end
) {
461 layer2
->append_off
= 0;
462 layer2
->bytes_free
= HAMMER_BIGBLOCK_SIZE
;
465 layer2
->zone
= HAMMER_ZONE_UNAVAIL_INDEX
;
466 layer2
->append_off
= HAMMER_BIGBLOCK_SIZE
;
467 layer2
->bytes_free
= 0;
470 hammer_crc_set_layer2(layer2
);
471 hammer_modify_buffer_done(buffer2
);
474 hammer_modify_buffer(trans
, buffer1
, layer1
, sizeof(*layer1
));
475 layer1
->blocks_free
+= layer1_count
;
476 hammer_crc_set_layer1(layer1
);
477 hammer_modify_buffer_done(buffer1
);
482 hammer_rel_buffer(buffer1
, 0);
484 hammer_rel_buffer(buffer2
, 0);
490 * XXX This somehow needs to stop doing hammer_modify_buffer() for
491 * layer2 entries. In theory removing a large block device could
492 * blow away UNDO fifo. The best way is to erase layer2 entries
493 * in userspace without UNDO getting involved after the device has
494 * been safely removed from the filesystem. HAMMER has no interest
495 * in what happens to the device once it's safely removed.
498 hammer_free_freemap(hammer_transaction_t trans
, hammer_volume_t volume
)
500 hammer_mount_t hmp
= trans
->hmp
;
501 hammer_volume_ondisk_t ondisk
;
502 hammer_blockmap_t freemap
;
503 hammer_off_t phys_offset
;
504 hammer_off_t block_offset
;
505 hammer_off_t layer1_offset
;
506 hammer_off_t layer2_offset
;
507 hammer_off_t vol_free_end
;
508 hammer_off_t aligned_vol_free_end
;
509 hammer_blockmap_layer1_t layer1
;
510 hammer_blockmap_layer2_t layer2
;
511 hammer_buffer_t buffer1
= NULL
;
512 hammer_buffer_t buffer2
= NULL
;
513 int64_t vol_buf_size
;
516 KKASSERT(volume
->vol_no
!= HAMMER_ROOT_VOLNO
);
518 ondisk
= volume
->ondisk
;
519 vol_buf_size
= HAMMER_VOL_BUF_SIZE(ondisk
);
520 KKASSERT((vol_buf_size
& ~HAMMER_OFF_SHORT_MASK
) == 0);
521 vol_free_end
= HAMMER_ENCODE_RAW_BUFFER(ondisk
->vol_no
,
522 vol_buf_size
& ~HAMMER_BIGBLOCK_MASK64
);
523 aligned_vol_free_end
= HAMMER_BLOCKMAP_LAYER2_DOALIGN(vol_free_end
);
525 freemap
= &hmp
->blockmap
[HAMMER_ZONE_FREEMAP_INDEX
];
527 hmkprintf(hmp
, "Free freemap volume %d\n", volume
->vol_no
);
529 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
530 phys_offset
< aligned_vol_free_end
;
531 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
532 layer1_offset
= freemap
->phys_offset
+
533 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
534 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
537 KKASSERT(layer1
->phys_offset
!= HAMMER_BLOCKMAP_UNAVAIL
);
539 for (block_offset
= 0;
540 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
541 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
542 layer2_offset
= layer1
->phys_offset
+
543 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
544 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
548 switch (layer2
->zone
) {
549 case HAMMER_ZONE_UNDO_INDEX
:
551 case HAMMER_ZONE_FREEMAP_INDEX
:
552 case HAMMER_ZONE_UNAVAIL_INDEX
:
555 KKASSERT(phys_offset
+ block_offset
< aligned_vol_free_end
);
556 if (layer2
->append_off
== 0 &&
557 layer2
->bytes_free
== HAMMER_BIGBLOCK_SIZE
)
561 return EBUSY
; /* Not empty */
565 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
566 phys_offset
< aligned_vol_free_end
;
567 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
568 layer1_offset
= freemap
->phys_offset
+
569 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
570 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
573 KKASSERT(layer1
->phys_offset
!= HAMMER_BLOCKMAP_UNAVAIL
);
575 for (block_offset
= 0;
576 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
577 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
578 layer2_offset
= layer1
->phys_offset
+
579 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
580 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
584 switch (layer2
->zone
) {
585 case HAMMER_ZONE_UNDO_INDEX
:
588 KKASSERT(phys_offset
+ block_offset
< aligned_vol_free_end
);
589 hammer_modify_buffer(trans
, buffer2
, layer2
, sizeof(*layer2
));
590 bzero(layer2
, sizeof(*layer2
));
591 hammer_modify_buffer_done(buffer2
);
596 hammer_modify_buffer(trans
, buffer1
, layer1
, sizeof(*layer1
));
597 bzero(layer1
, sizeof(*layer1
));
598 layer1
->phys_offset
= HAMMER_BLOCKMAP_UNAVAIL
;
599 hammer_crc_set_layer1(layer1
);
600 hammer_modify_buffer_done(buffer1
);
605 hammer_rel_buffer(buffer1
, 0);
607 hammer_rel_buffer(buffer2
, 0);
613 hammer_format_volume_header(hammer_mount_t hmp
,
614 struct hammer_ioc_volume
*ioc
,
615 hammer_volume_ondisk_t ondisk
,
618 hammer_volume_ondisk_t root_ondisk
;
621 KKASSERT(HAMMER_BUFSIZE
>= sizeof(struct hammer_volume_ondisk
));
624 * Just copy from the root volume header.
626 root_ondisk
= hmp
->rootvol
->ondisk
;
627 bzero(ondisk
, sizeof(struct hammer_volume_ondisk
));
628 ondisk
->vol_fsid
= root_ondisk
->vol_fsid
;
629 ondisk
->vol_fstype
= root_ondisk
->vol_fstype
;
630 ksnprintf(ondisk
->vol_label
, sizeof(ondisk
->vol_label
), "%s",
631 root_ondisk
->vol_label
);
632 ondisk
->vol_version
= root_ondisk
->vol_version
;
633 ondisk
->vol_rootvol
= root_ondisk
->vol_no
;
634 ondisk
->vol_signature
= root_ondisk
->vol_signature
;
636 KKASSERT(ondisk
->vol_rootvol
== HAMMER_ROOT_VOLNO
);
637 KKASSERT(ondisk
->vol_signature
== HAMMER_FSBUF_VOLUME
);
640 * Assign the new vol_no and vol_count.
642 ondisk
->vol_no
= vol_no
;
643 ondisk
->vol_count
= root_ondisk
->vol_count
+ 1;
646 * Reserve space for (future) header junk.
648 vol_alloc
= root_ondisk
->vol_bot_beg
;
649 ondisk
->vol_bot_beg
= vol_alloc
;
650 vol_alloc
+= ioc
->boot_area_size
;
651 ondisk
->vol_mem_beg
= vol_alloc
;
652 vol_alloc
+= ioc
->memory_log_size
;
655 * The remaining area is the zone 2 buffer allocation area.
657 ondisk
->vol_buf_beg
= vol_alloc
;
658 ondisk
->vol_buf_end
= ioc
->vol_size
& ~(int64_t)HAMMER_BUFMASK
;
660 if (HAMMER_VOL_BUF_SIZE(ondisk
) < 0) { /* int64_t */
661 hmkprintf(hmp
, "volume %d is too small to hold the volume header\n",
670 hammer_update_volumes_header(hammer_transaction_t trans
,
671 int64_t total_bigblocks
, int64_t empty_bigblocks
)
673 hammer_mount_t hmp
= trans
->hmp
;
674 struct mount
*mp
= hmp
->mp
;
675 hammer_volume_t volume
;
680 * Set each volume's new value of the vol_count field.
682 HAMMER_VOLUME_NUMBER_FOREACH(hmp
, vol_no
) {
683 volume
= hammer_get_volume(hmp
, vol_no
, &error
);
684 KKASSERT(volume
!= NULL
&& error
== 0);
685 hammer_modify_volume_field(trans
, volume
, vol_count
);
686 volume
->ondisk
->vol_count
= hmp
->nvolumes
;
687 hammer_modify_volume_done(volume
);
690 * Only changes to the header of the root volume
691 * are automatically flushed to disk. For all
692 * other volumes that we modify we do it here.
694 * No interlock is needed, volume buffers are not
695 * messed with by bioops.
697 if (volume
!= trans
->rootvol
&& volume
->io
.modified
) {
698 hammer_crc_set_volume(volume
->ondisk
);
699 hammer_io_flush(&volume
->io
, 0);
702 hammer_rel_volume(volume
, 0);
706 * Update the total number of big-blocks.
708 hammer_modify_volume_field(trans
, trans
->rootvol
, vol0_stat_bigblocks
);
709 trans
->rootvol
->ondisk
->vol0_stat_bigblocks
+= total_bigblocks
;
710 hammer_modify_volume_done(trans
->rootvol
);
713 * Big-block count changed so recompute the total number of blocks.
715 mp
->mnt_stat
.f_blocks
= trans
->rootvol
->ondisk
->vol0_stat_bigblocks
*
716 HAMMER_BUFFERS_PER_BIGBLOCK
;
717 mp
->mnt_vstat
.f_blocks
= trans
->rootvol
->ondisk
->vol0_stat_bigblocks
*
718 HAMMER_BUFFERS_PER_BIGBLOCK
;
721 * Update the total number of free big-blocks.
723 hammer_modify_volume_field(trans
, trans
->rootvol
,
724 vol0_stat_freebigblocks
);
725 trans
->rootvol
->ondisk
->vol0_stat_freebigblocks
+= empty_bigblocks
;
726 hammer_modify_volume_done(trans
->rootvol
);
729 * Update the copy in hmp.
731 hmp
->copy_stat_freebigblocks
=
732 trans
->rootvol
->ondisk
->vol0_stat_freebigblocks
;
738 * Count total big-blocks and empty big-blocks within the volume.
739 * The volume must be a non-root volume.
741 * Note that total big-blocks doesn't include big-blocks for layer2
742 * (and obviously layer1 and undomap). This is requirement of the
743 * volume header and this function is to retrieve that information.
746 hammer_count_bigblocks(hammer_mount_t hmp
, hammer_volume_t volume
,
747 int64_t *total_bigblocks
, int64_t *empty_bigblocks
)
749 hammer_volume_ondisk_t ondisk
;
750 hammer_blockmap_t freemap
;
751 hammer_off_t phys_offset
;
752 hammer_off_t block_offset
;
753 hammer_off_t layer1_offset
;
754 hammer_off_t layer2_offset
;
755 hammer_off_t vol_free_end
;
756 hammer_off_t aligned_vol_free_end
;
757 hammer_blockmap_layer1_t layer1
;
758 hammer_blockmap_layer2_t layer2
;
759 hammer_buffer_t buffer1
= NULL
;
760 hammer_buffer_t buffer2
= NULL
;
761 int64_t vol_buf_size
;
766 KKASSERT(volume
->vol_no
!= HAMMER_ROOT_VOLNO
);
768 *total_bigblocks
= 0; /* avoid gcc warnings */
769 *empty_bigblocks
= 0; /* avoid gcc warnings */
771 ondisk
= volume
->ondisk
;
772 vol_buf_size
= HAMMER_VOL_BUF_SIZE(ondisk
);
773 KKASSERT((vol_buf_size
& ~HAMMER_OFF_SHORT_MASK
) == 0);
774 vol_free_end
= HAMMER_ENCODE_RAW_BUFFER(ondisk
->vol_no
,
775 vol_buf_size
& ~HAMMER_BIGBLOCK_MASK64
);
776 aligned_vol_free_end
= HAMMER_BLOCKMAP_LAYER2_DOALIGN(vol_free_end
);
778 freemap
= &hmp
->blockmap
[HAMMER_ZONE_FREEMAP_INDEX
];
780 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->ondisk
->vol_no
, 0);
781 phys_offset
< aligned_vol_free_end
;
782 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
783 layer1_offset
= freemap
->phys_offset
+
784 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
785 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
789 for (block_offset
= 0;
790 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
791 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
792 layer2_offset
= layer1
->phys_offset
+
793 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
794 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
798 switch (layer2
->zone
) {
799 case HAMMER_ZONE_UNDO_INDEX
:
801 case HAMMER_ZONE_FREEMAP_INDEX
:
802 case HAMMER_ZONE_UNAVAIL_INDEX
:
805 KKASSERT(phys_offset
+ block_offset
< aligned_vol_free_end
);
807 if (layer2
->append_off
== 0 &&
808 layer2
->bytes_free
== HAMMER_BIGBLOCK_SIZE
)
815 hmkprintf(hmp
, "big-blocks total=%jd empty=%jd\n", total
, empty
);
816 *total_bigblocks
= total
;
817 *empty_bigblocks
= empty
;
820 hammer_rel_buffer(buffer1
, 0);
822 hammer_rel_buffer(buffer2
, 0);