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
;
300 if (hammer_lock_ex_try(&hmp
->volume_lock
) != 0) {
301 hmkprintf(hmp
, "Another volume operation is in progress!\n");
305 HAMMER_VOLUME_NUMBER_FOREACH(hmp
, i
) {
306 if (cnt
>= ioc
->nvols
)
308 volume
= hammer_get_volume(hmp
, i
, &error
);
309 KKASSERT(volume
!= NULL
&& error
== 0);
311 len
= strlen(volume
->vol_name
) + 1;
312 KKASSERT(len
<= MAXPATHLEN
);
314 vol_no
= volume
->vol_no
;
315 error
= copyout(&vol_no
, &ioc
->vols
[cnt
].vol_no
,
316 sizeof(ioc
->vols
[cnt
].vol_no
));
318 error
= copyout(volume
->vol_name
,
319 &ioc
->vols
[cnt
].device_name
[0], len
);
320 hammer_rel_volume(volume
, 0);
328 hammer_unlock(&hmp
->volume_lock
);
334 hammer_do_reblock(hammer_transaction_t trans
, hammer_inode_t ip
)
336 hammer_mount_t hmp
= trans
->hmp
;
340 struct hammer_ioc_reblock reblock
;
341 bzero(&reblock
, sizeof(reblock
));
343 vol_no
= trans
->hmp
->volume_to_remove
;
344 KKASSERT(vol_no
!= -1);
346 reblock
.key_beg
.localization
= HAMMER_MIN_LOCALIZATION
;
347 reblock
.key_beg
.obj_id
= HAMMER_MIN_OBJID
;
348 reblock
.key_end
.localization
= HAMMER_MAX_LOCALIZATION
;
349 reblock
.key_end
.obj_id
= HAMMER_MAX_OBJID
;
350 reblock
.head
.flags
= HAMMER_IOC_DO_FLAGS
;
351 reblock
.free_level
= 0; /* reblock all big-blocks */
352 reblock
.allpfs
= 1; /* reblock all PFS */
353 reblock
.vol_no
= vol_no
;
355 hmkprintf(hmp
, "reblock started\n");
356 error
= hammer_ioc_reblock(trans
, ip
, &reblock
);
358 if (reblock
.head
.flags
& HAMMER_IOC_HEAD_INTR
) {
363 if (error
== EINTR
) {
364 hmkprintf(hmp
, "reblock was interrupted\n");
366 hmkprintf(hmp
, "reblock failed: %d\n", error
);
375 * XXX This somehow needs to stop doing hammer_modify_buffer() for
376 * layer2 entries. In theory adding a large block device could
377 * blow away UNDO fifo. The best way is to format layer2 entries
378 * in userspace without UNDO getting involved before the device is
379 * safely added to the filesystem. HAMMER has no interest in what
380 * has happened to the device before it safely joins the filesystem.
383 hammer_format_freemap(hammer_transaction_t trans
, hammer_volume_t volume
)
385 hammer_mount_t hmp
= trans
->hmp
;
386 hammer_volume_ondisk_t ondisk
;
387 hammer_blockmap_t freemap
;
388 hammer_off_t alloc_offset
;
389 hammer_off_t phys_offset
;
390 hammer_off_t block_offset
;
391 hammer_off_t layer1_offset
;
392 hammer_off_t layer2_offset
;
393 hammer_off_t vol_free_end
;
394 hammer_off_t aligned_vol_free_end
;
395 hammer_blockmap_layer1_t layer1
;
396 hammer_blockmap_layer2_t layer2
;
397 hammer_buffer_t buffer1
= NULL
;
398 hammer_buffer_t buffer2
= NULL
;
399 int64_t vol_buf_size
;
400 int64_t layer1_count
= 0;
403 KKASSERT(volume
->vol_no
!= HAMMER_ROOT_VOLNO
);
405 ondisk
= volume
->ondisk
;
406 vol_buf_size
= HAMMER_VOL_BUF_SIZE(ondisk
);
407 KKASSERT((vol_buf_size
& ~HAMMER_OFF_SHORT_MASK
) == 0);
408 vol_free_end
= HAMMER_ENCODE_RAW_BUFFER(ondisk
->vol_no
,
409 vol_buf_size
& ~HAMMER_BIGBLOCK_MASK64
);
410 aligned_vol_free_end
= HAMMER_BLOCKMAP_LAYER2_DOALIGN(vol_free_end
);
412 freemap
= &hmp
->blockmap
[HAMMER_ZONE_FREEMAP_INDEX
];
413 alloc_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
415 hmkprintf(hmp
, "Initialize freemap volume %d\n", volume
->vol_no
);
417 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
418 phys_offset
< aligned_vol_free_end
;
419 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
420 layer1_offset
= freemap
->phys_offset
+
421 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
422 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
425 if (layer1
->phys_offset
== HAMMER_BLOCKMAP_UNAVAIL
) {
426 hammer_modify_buffer(trans
, buffer1
, layer1
, sizeof(*layer1
));
427 bzero(layer1
, sizeof(*layer1
));
428 layer1
->phys_offset
= alloc_offset
;
429 layer1
->blocks_free
= 0;
430 hammer_crc_set_layer1(hmp
->version
, layer1
);
431 hammer_modify_buffer_done(buffer1
);
432 alloc_offset
+= HAMMER_BIGBLOCK_SIZE
;
436 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
437 phys_offset
< aligned_vol_free_end
;
438 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
440 layer1_offset
= freemap
->phys_offset
+
441 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
442 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
445 KKASSERT(layer1
->phys_offset
!= HAMMER_BLOCKMAP_UNAVAIL
);
447 for (block_offset
= 0;
448 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
449 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
450 layer2_offset
= layer1
->phys_offset
+
451 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
452 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
456 hammer_modify_buffer(trans
, buffer2
, layer2
, sizeof(*layer2
));
457 bzero(layer2
, sizeof(*layer2
));
459 if (phys_offset
+ block_offset
< alloc_offset
) {
460 layer2
->zone
= HAMMER_ZONE_FREEMAP_INDEX
;
461 layer2
->append_off
= HAMMER_BIGBLOCK_SIZE
;
462 layer2
->bytes_free
= 0;
463 } else if (phys_offset
+ block_offset
< vol_free_end
) {
465 layer2
->append_off
= 0;
466 layer2
->bytes_free
= HAMMER_BIGBLOCK_SIZE
;
469 layer2
->zone
= HAMMER_ZONE_UNAVAIL_INDEX
;
470 layer2
->append_off
= HAMMER_BIGBLOCK_SIZE
;
471 layer2
->bytes_free
= 0;
474 hammer_crc_set_layer2(hmp
->version
, layer2
);
475 hammer_modify_buffer_done(buffer2
);
478 hammer_modify_buffer(trans
, buffer1
, layer1
, sizeof(*layer1
));
479 layer1
->blocks_free
+= layer1_count
;
480 hammer_crc_set_layer1(hmp
->version
, layer1
);
481 hammer_modify_buffer_done(buffer1
);
486 hammer_rel_buffer(buffer1
, 0);
488 hammer_rel_buffer(buffer2
, 0);
494 * XXX This somehow needs to stop doing hammer_modify_buffer() for
495 * layer2 entries. In theory removing a large block device could
496 * blow away UNDO fifo. The best way is to erase layer2 entries
497 * in userspace without UNDO getting involved after the device has
498 * been safely removed from the filesystem. HAMMER has no interest
499 * in what happens to the device once it's safely removed.
502 hammer_free_freemap(hammer_transaction_t trans
, hammer_volume_t volume
)
504 hammer_mount_t hmp
= trans
->hmp
;
505 hammer_volume_ondisk_t ondisk
;
506 hammer_blockmap_t freemap
;
507 hammer_off_t phys_offset
;
508 hammer_off_t block_offset
;
509 hammer_off_t layer1_offset
;
510 hammer_off_t layer2_offset
;
511 hammer_off_t vol_free_end
;
512 hammer_off_t aligned_vol_free_end
;
513 hammer_blockmap_layer1_t layer1
;
514 hammer_blockmap_layer2_t layer2
;
515 hammer_buffer_t buffer1
= NULL
;
516 hammer_buffer_t buffer2
= NULL
;
517 int64_t vol_buf_size
;
520 KKASSERT(volume
->vol_no
!= HAMMER_ROOT_VOLNO
);
522 ondisk
= volume
->ondisk
;
523 vol_buf_size
= HAMMER_VOL_BUF_SIZE(ondisk
);
524 KKASSERT((vol_buf_size
& ~HAMMER_OFF_SHORT_MASK
) == 0);
525 vol_free_end
= HAMMER_ENCODE_RAW_BUFFER(ondisk
->vol_no
,
526 vol_buf_size
& ~HAMMER_BIGBLOCK_MASK64
);
527 aligned_vol_free_end
= HAMMER_BLOCKMAP_LAYER2_DOALIGN(vol_free_end
);
529 freemap
= &hmp
->blockmap
[HAMMER_ZONE_FREEMAP_INDEX
];
531 hmkprintf(hmp
, "Free freemap volume %d\n", volume
->vol_no
);
533 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
534 phys_offset
< aligned_vol_free_end
;
535 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
536 layer1_offset
= freemap
->phys_offset
+
537 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
538 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
541 KKASSERT(layer1
->phys_offset
!= HAMMER_BLOCKMAP_UNAVAIL
);
543 for (block_offset
= 0;
544 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
545 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
546 layer2_offset
= layer1
->phys_offset
+
547 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
548 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
552 switch (layer2
->zone
) {
553 case HAMMER_ZONE_UNDO_INDEX
:
555 case HAMMER_ZONE_FREEMAP_INDEX
:
556 case HAMMER_ZONE_UNAVAIL_INDEX
:
559 KKASSERT(phys_offset
+ block_offset
< aligned_vol_free_end
);
560 if (layer2
->append_off
== 0 &&
561 layer2
->bytes_free
== HAMMER_BIGBLOCK_SIZE
)
565 return EBUSY
; /* Not empty */
569 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->vol_no
, 0);
570 phys_offset
< aligned_vol_free_end
;
571 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
572 layer1_offset
= freemap
->phys_offset
+
573 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
574 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
577 KKASSERT(layer1
->phys_offset
!= HAMMER_BLOCKMAP_UNAVAIL
);
579 for (block_offset
= 0;
580 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
581 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
582 layer2_offset
= layer1
->phys_offset
+
583 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
584 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
588 switch (layer2
->zone
) {
589 case HAMMER_ZONE_UNDO_INDEX
:
592 KKASSERT(phys_offset
+ block_offset
< aligned_vol_free_end
);
593 hammer_modify_buffer(trans
, buffer2
, layer2
, sizeof(*layer2
));
594 bzero(layer2
, sizeof(*layer2
));
595 hammer_modify_buffer_done(buffer2
);
600 hammer_modify_buffer(trans
, buffer1
, layer1
, sizeof(*layer1
));
601 bzero(layer1
, sizeof(*layer1
));
602 layer1
->phys_offset
= HAMMER_BLOCKMAP_UNAVAIL
;
603 hammer_crc_set_layer1(hmp
->version
, layer1
);
604 hammer_modify_buffer_done(buffer1
);
609 hammer_rel_buffer(buffer1
, 0);
611 hammer_rel_buffer(buffer2
, 0);
617 hammer_format_volume_header(hammer_mount_t hmp
,
618 struct hammer_ioc_volume
*ioc
,
619 hammer_volume_ondisk_t ondisk
,
622 hammer_volume_ondisk_t root_ondisk
;
625 KKASSERT(HAMMER_BUFSIZE
>= sizeof(struct hammer_volume_ondisk
));
628 * Just copy from the root volume header.
630 root_ondisk
= hmp
->rootvol
->ondisk
;
631 bzero(ondisk
, sizeof(struct hammer_volume_ondisk
));
632 ondisk
->vol_fsid
= root_ondisk
->vol_fsid
;
633 ondisk
->vol_fstype
= root_ondisk
->vol_fstype
;
634 ksnprintf(ondisk
->vol_label
, sizeof(ondisk
->vol_label
), "%s",
635 root_ondisk
->vol_label
);
636 ondisk
->vol_version
= root_ondisk
->vol_version
;
637 ondisk
->vol_rootvol
= root_ondisk
->vol_no
;
638 ondisk
->vol_signature
= root_ondisk
->vol_signature
;
640 KKASSERT(ondisk
->vol_rootvol
== HAMMER_ROOT_VOLNO
);
641 KKASSERT(ondisk
->vol_signature
== HAMMER_FSBUF_VOLUME
);
644 * Assign the new vol_no and vol_count.
646 ondisk
->vol_no
= vol_no
;
647 ondisk
->vol_count
= root_ondisk
->vol_count
+ 1;
650 * Reserve space for (future) header junk.
652 vol_alloc
= root_ondisk
->vol_bot_beg
;
653 ondisk
->vol_bot_beg
= vol_alloc
;
654 vol_alloc
+= ioc
->boot_area_size
;
655 ondisk
->vol_mem_beg
= vol_alloc
;
656 vol_alloc
+= ioc
->memory_log_size
;
659 * The remaining area is the zone 2 buffer allocation area.
661 ondisk
->vol_buf_beg
= vol_alloc
;
662 ondisk
->vol_buf_end
= ioc
->vol_size
& ~(int64_t)HAMMER_BUFMASK
;
664 if (HAMMER_VOL_BUF_SIZE(ondisk
) < 0) { /* int64_t */
665 hmkprintf(hmp
, "volume %d is too small to hold the volume header\n",
674 hammer_update_volumes_header(hammer_transaction_t trans
,
675 int64_t total_bigblocks
, int64_t empty_bigblocks
)
677 hammer_mount_t hmp
= trans
->hmp
;
678 struct mount
*mp
= hmp
->mp
;
679 hammer_volume_t volume
;
684 * Set each volume's new value of the vol_count field.
686 HAMMER_VOLUME_NUMBER_FOREACH(hmp
, vol_no
) {
687 volume
= hammer_get_volume(hmp
, vol_no
, &error
);
688 KKASSERT(volume
!= NULL
&& error
== 0);
689 hammer_modify_volume_field(trans
, volume
, vol_count
);
690 volume
->ondisk
->vol_count
= hmp
->nvolumes
;
691 hammer_modify_volume_done(volume
);
694 * Only changes to the header of the root volume
695 * are automatically flushed to disk. For all
696 * other volumes that we modify we do it here.
698 * No interlock is needed, volume buffers are not
699 * messed with by bioops.
701 if (volume
!= trans
->rootvol
&& volume
->io
.modified
) {
702 hammer_crc_set_volume(hmp
->version
, volume
->ondisk
);
703 hammer_io_flush(&volume
->io
, 0);
706 hammer_rel_volume(volume
, 0);
710 * Update the total number of big-blocks.
712 hammer_modify_volume_field(trans
, trans
->rootvol
, vol0_stat_bigblocks
);
713 trans
->rootvol
->ondisk
->vol0_stat_bigblocks
+= total_bigblocks
;
714 hammer_modify_volume_done(trans
->rootvol
);
717 * Big-block count changed so recompute the total number of blocks.
719 mp
->mnt_stat
.f_blocks
= trans
->rootvol
->ondisk
->vol0_stat_bigblocks
*
720 HAMMER_BUFFERS_PER_BIGBLOCK
;
721 mp
->mnt_vstat
.f_blocks
= trans
->rootvol
->ondisk
->vol0_stat_bigblocks
*
722 HAMMER_BUFFERS_PER_BIGBLOCK
;
725 * Update the total number of free big-blocks.
727 hammer_modify_volume_field(trans
, trans
->rootvol
,
728 vol0_stat_freebigblocks
);
729 trans
->rootvol
->ondisk
->vol0_stat_freebigblocks
+= empty_bigblocks
;
730 hammer_modify_volume_done(trans
->rootvol
);
733 * Update the copy in hmp.
735 hmp
->copy_stat_freebigblocks
=
736 trans
->rootvol
->ondisk
->vol0_stat_freebigblocks
;
742 * Count total big-blocks and empty big-blocks within the volume.
743 * The volume must be a non-root volume.
745 * Note that total big-blocks doesn't include big-blocks for layer2
746 * (and obviously layer1 and undomap). This is requirement of the
747 * volume header and this function is to retrieve that information.
750 hammer_count_bigblocks(hammer_mount_t hmp
, hammer_volume_t volume
,
751 int64_t *total_bigblocks
, int64_t *empty_bigblocks
)
753 hammer_volume_ondisk_t ondisk
;
754 hammer_blockmap_t freemap
;
755 hammer_off_t phys_offset
;
756 hammer_off_t block_offset
;
757 hammer_off_t layer1_offset
;
758 hammer_off_t layer2_offset
;
759 hammer_off_t vol_free_end
;
760 hammer_off_t aligned_vol_free_end
;
761 hammer_blockmap_layer1_t layer1
;
762 hammer_blockmap_layer2_t layer2
;
763 hammer_buffer_t buffer1
= NULL
;
764 hammer_buffer_t buffer2
= NULL
;
765 int64_t vol_buf_size
;
770 KKASSERT(volume
->vol_no
!= HAMMER_ROOT_VOLNO
);
772 *total_bigblocks
= 0; /* avoid gcc warnings */
773 *empty_bigblocks
= 0; /* avoid gcc warnings */
775 ondisk
= volume
->ondisk
;
776 vol_buf_size
= HAMMER_VOL_BUF_SIZE(ondisk
);
777 KKASSERT((vol_buf_size
& ~HAMMER_OFF_SHORT_MASK
) == 0);
778 vol_free_end
= HAMMER_ENCODE_RAW_BUFFER(ondisk
->vol_no
,
779 vol_buf_size
& ~HAMMER_BIGBLOCK_MASK64
);
780 aligned_vol_free_end
= HAMMER_BLOCKMAP_LAYER2_DOALIGN(vol_free_end
);
782 freemap
= &hmp
->blockmap
[HAMMER_ZONE_FREEMAP_INDEX
];
784 for (phys_offset
= HAMMER_ENCODE_RAW_BUFFER(volume
->ondisk
->vol_no
, 0);
785 phys_offset
< aligned_vol_free_end
;
786 phys_offset
+= HAMMER_BLOCKMAP_LAYER2
) {
787 layer1_offset
= freemap
->phys_offset
+
788 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset
);
789 layer1
= hammer_bread(hmp
, layer1_offset
, &error
, &buffer1
);
793 for (block_offset
= 0;
794 block_offset
< HAMMER_BLOCKMAP_LAYER2
;
795 block_offset
+= HAMMER_BIGBLOCK_SIZE
) {
796 layer2_offset
= layer1
->phys_offset
+
797 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset
);
798 layer2
= hammer_bread(hmp
, layer2_offset
, &error
, &buffer2
);
802 switch (layer2
->zone
) {
803 case HAMMER_ZONE_UNDO_INDEX
:
805 case HAMMER_ZONE_FREEMAP_INDEX
:
806 case HAMMER_ZONE_UNAVAIL_INDEX
:
809 KKASSERT(phys_offset
+ block_offset
< aligned_vol_free_end
);
811 if (layer2
->append_off
== 0 &&
812 layer2
->bytes_free
== HAMMER_BIGBLOCK_SIZE
)
819 hmkprintf(hmp
, "big-blocks total=%jd empty=%jd\n", total
, empty
);
820 *total_bigblocks
= total
;
821 *empty_bigblocks
= empty
;
824 hammer_rel_buffer(buffer1
, 0);
826 hammer_rel_buffer(buffer2
, 0);