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(struct hammer_mount *hmp,
41 struct hammer_volume_ondisk *ondisk,
42 const char *vol_name, int vol_no, int vol_count,
43 int64_t vol_size, int64_t boot_area_size, int64_t mem_area_size);
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 struct hammer_mount *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 (hmp->nvolumes >= HAMMER_MAX_VOLUMES) {
80 hmkprintf(hmp, "Max number of HAMMER volumes exceeded\n");
84 if (hammer_lock_ex_try(&hmp->volume_lock) != 0) {
85 hmkprintf(hmp, "Another volume operation is in progress!\n");
90 * Find an unused volume number.
92 while (free_vol_no < HAMMER_MAX_VOLUMES &&
93 HAMMER_VOLUME_NUMBER_IS_SET(hmp, free_vol_no)) {
96 if (free_vol_no >= HAMMER_MAX_VOLUMES) {
97 hmkprintf(hmp, "Max number of HAMMER volumes exceeded\n");
102 error = hammer_format_volume_header(
105 hmp->rootvol->ondisk->vol_name,
114 error = hammer_install_volume(hmp, ioc->device_name, NULL, &ondisk);
118 hammer_sync_lock_sh(trans);
119 hammer_lock_ex(&hmp->blkmap_lock);
121 volume = hammer_get_volume(hmp, free_vol_no, &error);
122 KKASSERT(volume != NULL && error == 0);
124 error = hammer_format_freemap(trans, volume);
125 KKASSERT(error == 0);
127 error = hammer_count_bigblocks(hmp, volume,
128 &total_bigblocks, &empty_bigblocks);
129 KKASSERT(error == 0);
130 KKASSERT(total_bigblocks == empty_bigblocks);
132 hammer_rel_volume(volume, 0);
135 error = hammer_update_volumes_header(trans,
136 total_bigblocks, empty_bigblocks);
137 KKASSERT(error == 0);
139 hammer_unlock(&hmp->blkmap_lock);
140 hammer_sync_unlock(trans);
142 KKASSERT(error == 0);
144 hammer_unlock(&hmp->volume_lock);
146 hmkprintf(hmp, "An error occurred: %d\n", error);
155 hammer_ioc_volume_del(hammer_transaction_t trans, hammer_inode_t ip,
156 struct hammer_ioc_volume *ioc)
158 struct hammer_mount *hmp = trans->hmp;
159 struct mount *mp = hmp->mp;
160 struct hammer_volume_ondisk *ondisk;
161 hammer_volume_t volume;
162 int64_t total_bigblocks, empty_bigblocks;
166 if (mp->mnt_flag & MNT_RDONLY) {
167 hmkprintf(hmp, "Cannot del volume from read-only HAMMER filesystem\n");
171 if (hmp->nvolumes <= 1) {
172 hmkprintf(hmp, "No HAMMER volume to delete\n");
176 if (hammer_lock_ex_try(&hmp->volume_lock) != 0) {
177 hmkprintf(hmp, "Another volume operation is in progress!\n");
182 * find volume by volname
185 HAMMER_VOLUME_NUMBER_FOREACH(hmp, vol_no) {
186 volume = hammer_get_volume(hmp, vol_no, &error);
187 KKASSERT(volume != NULL && error == 0);
188 if (strcmp(volume->vol_name, ioc->device_name) == 0) {
191 hammer_rel_volume(volume, 0);
195 if (volume == NULL) {
196 hmkprintf(hmp, "Couldn't find volume\n");
201 if (volume == trans->rootvol) {
202 hmkprintf(hmp, "Cannot remove root-volume\n");
203 hammer_rel_volume(volume, 0);
209 * Reblock filesystem if the volume is not empty
211 hmp->volume_to_remove = volume->vol_no;
213 error = hammer_count_bigblocks(hmp, volume,
214 &total_bigblocks, &empty_bigblocks);
215 KKASSERT(error == 0);
217 if (total_bigblocks == empty_bigblocks) {
218 hmkprintf(hmp, "%s is already empty\n", volume->vol_name);
220 error = hammer_do_reblock(trans, ip);
222 hmp->volume_to_remove = -1;
223 hammer_rel_volume(volume, 0);
231 hammer_flush_dirty(hmp, 30);
233 hammer_sync_lock_sh(trans);
234 hammer_lock_ex(&hmp->blkmap_lock);
236 error = hammer_count_bigblocks(hmp, volume,
237 &total_bigblocks, &empty_bigblocks);
238 KKASSERT(error == 0);
240 error = hammer_free_freemap(trans, volume);
242 hmkprintf(hmp, "Failed to free volume: ");
244 kprintf("Volume %d not empty\n", volume->vol_no);
246 kprintf("%d\n", error);
247 hmp->volume_to_remove = -1;
248 hammer_rel_volume(volume, 0);
251 hammer_rel_volume(volume, 0);
256 RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL,
257 hammer_unload_buffer, volume);
259 bzero(&ondisk, sizeof(ondisk));
260 error = hammer_unload_volume(volume, &ondisk);
262 hmkprintf(hmp, "Failed to unload volume\n");
267 error = hammer_update_volumes_header(trans,
268 -total_bigblocks, -empty_bigblocks);
269 KKASSERT(error == 0);
270 hmp->volume_to_remove = -1;
273 hammer_unlock(&hmp->blkmap_lock);
274 hammer_sync_unlock(trans);
277 hammer_unlock(&hmp->volume_lock);
279 hmkprintf(hmp, "An error occurred: %d\n", error);
285 hammer_ioc_volume_list(hammer_transaction_t trans, hammer_inode_t ip,
286 struct hammer_ioc_volume_list *ioc)
288 struct hammer_mount *hmp = trans->hmp;
289 hammer_volume_t volume;
293 if (hammer_lock_ex_try(&hmp->volume_lock) != 0) {
294 hmkprintf(hmp, "Another volume operation is in progress!\n");
298 HAMMER_VOLUME_NUMBER_FOREACH(hmp, i) {
299 if (cnt >= ioc->nvols)
301 volume = hammer_get_volume(hmp, i, &error);
302 KKASSERT(volume != NULL && error == 0);
304 len = strlen(volume->vol_name) + 1;
305 KKASSERT(len <= MAXPATHLEN);
307 error = copyout(volume->vol_name, ioc->vols[cnt].device_name,
309 hammer_rel_volume(volume, 0);
317 hammer_unlock(&hmp->volume_lock);
323 hammer_do_reblock(hammer_transaction_t trans, hammer_inode_t ip)
325 struct hammer_mount *hmp = trans->hmp;
329 struct hammer_ioc_reblock reblock;
330 bzero(&reblock, sizeof(reblock));
332 vol_no = trans->hmp->volume_to_remove;
333 KKASSERT(vol_no != -1);
335 reblock.key_beg.localization = HAMMER_MIN_LOCALIZATION;
336 reblock.key_beg.obj_id = HAMMER_MIN_OBJID;
337 reblock.key_end.localization = HAMMER_MAX_LOCALIZATION;
338 reblock.key_end.obj_id = HAMMER_MAX_OBJID;
339 reblock.head.flags = HAMMER_IOC_DO_FLAGS;
340 reblock.free_level = 0; /* reblock all big-blocks */
341 reblock.allpfs = 1; /* reblock all PFS */
342 reblock.vol_no = vol_no;
344 hmkprintf(hmp, "reblock started\n");
345 error = hammer_ioc_reblock(trans, ip, &reblock);
347 if (reblock.head.flags & HAMMER_IOC_HEAD_INTR) {
352 if (error == EINTR) {
353 hmkprintf(hmp, "reblock was interrupted\n");
355 hmkprintf(hmp, "reblock failed: %d\n", error);
364 hammer_format_freemap(hammer_transaction_t trans, hammer_volume_t volume)
366 struct hammer_mount *hmp = trans->hmp;
367 struct hammer_volume_ondisk *ondisk;
368 hammer_blockmap_t freemap;
369 hammer_off_t alloc_offset;
370 hammer_off_t phys_offset;
371 hammer_off_t block_offset;
372 hammer_off_t layer1_offset;
373 hammer_off_t layer2_offset;
374 hammer_off_t vol_free_end;
375 hammer_off_t aligned_vol_free_end;
376 struct hammer_blockmap_layer1 *layer1;
377 struct hammer_blockmap_layer2 *layer2;
378 hammer_buffer_t buffer1 = NULL;
379 hammer_buffer_t buffer2 = NULL;
380 int64_t vol_buf_size;
381 int64_t layer1_count = 0;
384 KKASSERT(volume->vol_no != HAMMER_ROOT_VOLNO);
386 ondisk = volume->ondisk;
387 vol_buf_size = ondisk->vol_buf_end - ondisk->vol_buf_beg;
388 vol_free_end = HAMMER_ENCODE_RAW_BUFFER(ondisk->vol_no,
389 vol_buf_size & ~HAMMER_BIGBLOCK_MASK64);
390 aligned_vol_free_end = (vol_free_end + HAMMER_BLOCKMAP_LAYER2_MASK)
391 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
393 freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
394 alloc_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
396 hmkprintf(hmp, "Initialize freemap volume %d\n", volume->vol_no);
398 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
399 phys_offset < aligned_vol_free_end;
400 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
401 layer1_offset = freemap->phys_offset +
402 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
403 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
406 if (layer1->phys_offset == HAMMER_BLOCKMAP_UNAVAIL) {
407 hammer_modify_buffer(trans, buffer1, layer1, sizeof(*layer1));
408 bzero(layer1, sizeof(*layer1));
409 layer1->phys_offset = alloc_offset;
410 layer1->blocks_free = 0;
411 layer1->layer1_crc = crc32(layer1, HAMMER_LAYER1_CRCSIZE);
412 hammer_modify_buffer_done(buffer1);
413 alloc_offset += HAMMER_BIGBLOCK_SIZE;
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) {
421 layer1_offset = freemap->phys_offset +
422 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
423 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
426 KKASSERT(layer1->phys_offset != HAMMER_BLOCKMAP_UNAVAIL);
428 for (block_offset = 0;
429 block_offset < HAMMER_BLOCKMAP_LAYER2;
430 block_offset += HAMMER_BIGBLOCK_SIZE) {
431 layer2_offset = layer1->phys_offset +
432 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
433 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
437 hammer_modify_buffer(trans, buffer2, layer2, sizeof(*layer2));
438 bzero(layer2, sizeof(*layer2));
440 if (phys_offset + block_offset < alloc_offset) {
441 layer2->zone = HAMMER_ZONE_FREEMAP_INDEX;
442 layer2->append_off = HAMMER_BIGBLOCK_SIZE;
443 layer2->bytes_free = 0;
444 } else if (phys_offset + block_offset < vol_free_end) {
446 layer2->append_off = 0;
447 layer2->bytes_free = HAMMER_BIGBLOCK_SIZE;
450 layer2->zone = HAMMER_ZONE_UNAVAIL_INDEX;
451 layer2->append_off = HAMMER_BIGBLOCK_SIZE;
452 layer2->bytes_free = 0;
455 layer2->entry_crc = crc32(layer2, HAMMER_LAYER2_CRCSIZE);
456 hammer_modify_buffer_done(buffer2);
459 hammer_modify_buffer(trans, buffer1, layer1, sizeof(*layer1));
460 layer1->blocks_free += layer1_count;
461 layer1->layer1_crc = crc32(layer1, HAMMER_LAYER1_CRCSIZE);
462 hammer_modify_buffer_done(buffer1);
467 hammer_rel_buffer(buffer1, 0);
469 hammer_rel_buffer(buffer2, 0);
475 hammer_free_freemap(hammer_transaction_t trans, hammer_volume_t volume)
477 struct hammer_mount *hmp = trans->hmp;
478 struct hammer_volume_ondisk *ondisk;
479 hammer_blockmap_t freemap;
480 hammer_off_t phys_offset;
481 hammer_off_t block_offset;
482 hammer_off_t layer1_offset;
483 hammer_off_t layer2_offset;
484 hammer_off_t vol_free_end;
485 hammer_off_t aligned_vol_free_end;
486 struct hammer_blockmap_layer1 *layer1;
487 struct hammer_blockmap_layer2 *layer2;
488 hammer_buffer_t buffer1 = NULL;
489 hammer_buffer_t buffer2 = NULL;
490 int64_t vol_buf_size;
491 int64_t layer1_count = 0;
494 KKASSERT(volume->vol_no != HAMMER_ROOT_VOLNO);
496 ondisk = volume->ondisk;
497 vol_buf_size = ondisk->vol_buf_end - ondisk->vol_buf_beg;
498 vol_free_end = HAMMER_ENCODE_RAW_BUFFER(ondisk->vol_no,
499 vol_buf_size & ~HAMMER_BIGBLOCK_MASK64);
500 aligned_vol_free_end = (vol_free_end + HAMMER_BLOCKMAP_LAYER2_MASK)
501 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
503 freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
505 hmkprintf(hmp, "Free freemap volume %d\n", volume->vol_no);
507 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
508 phys_offset < aligned_vol_free_end;
509 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
511 layer1_offset = freemap->phys_offset +
512 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
513 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
516 KKASSERT(layer1->phys_offset != HAMMER_BLOCKMAP_UNAVAIL);
518 for (block_offset = 0;
519 block_offset < HAMMER_BLOCKMAP_LAYER2;
520 block_offset += HAMMER_BIGBLOCK_SIZE) {
521 layer2_offset = layer1->phys_offset +
522 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
523 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
527 switch (layer2->zone) {
528 case HAMMER_ZONE_UNDO_INDEX:
530 case HAMMER_ZONE_FREEMAP_INDEX:
531 case HAMMER_ZONE_UNAVAIL_INDEX:
534 KKASSERT(phys_offset + block_offset < aligned_vol_free_end);
535 if (layer2->append_off == 0 &&
536 layer2->bytes_free == HAMMER_BIGBLOCK_SIZE)
540 return EBUSY; /* Not empty */
544 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
545 phys_offset < aligned_vol_free_end;
546 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
548 layer1_offset = freemap->phys_offset +
549 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
550 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
553 KKASSERT(layer1->phys_offset != HAMMER_BLOCKMAP_UNAVAIL);
555 hammer_modify_buffer(trans, buffer1, layer1, sizeof(*layer1));
556 bzero(layer1, sizeof(*layer1));
557 layer1->phys_offset = HAMMER_BLOCKMAP_UNAVAIL;
558 layer1->layer1_crc = crc32(layer1, HAMMER_LAYER1_CRCSIZE);
559 hammer_modify_buffer_done(buffer1);
564 hammer_rel_buffer(buffer1, 0);
566 hammer_rel_buffer(buffer2, 0);
572 * XXX This will be removed by the next git commit.
575 hammer_iterate_l1l2_entries(hammer_transaction_t trans, hammer_volume_t volume,
576 int (*callback)(hammer_transaction_t, hammer_volume_t, hammer_buffer_t*,
577 struct hammer_blockmap_layer1*, struct hammer_blockmap_layer2*,
578 hammer_off_t, hammer_off_t, void*),
581 * Iterate over all usable L1 entries of the volume and
582 * the corresponding L2 entries.
585 hammer_iterate_l1l2_entries(hammer_transaction_t trans, hammer_volume_t volume,
586 int (*callback)(hammer_transaction_t, hammer_volume_t, hammer_buffer_t*,
587 struct hammer_blockmap_layer1*, struct hammer_blockmap_layer2*,
588 hammer_off_t, hammer_off_t, void*),
591 struct hammer_mount *hmp = trans->hmp;
592 hammer_blockmap_t freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
594 hammer_off_t phys_off;
595 hammer_off_t block_off;
596 hammer_off_t layer1_off;
597 hammer_off_t layer2_off;
598 hammer_off_t aligned_buf_end_off;
599 hammer_off_t aligned_vol_end_off;
600 struct hammer_blockmap_layer1 *layer1;
601 struct hammer_blockmap_layer2 *layer2;
602 hammer_buffer_t buffer1 = NULL;
603 hammer_buffer_t buffer2 = NULL;
606 * Calculate the usable size of the volume, which
607 * must be aligned at a big-block (8 MB) boundary.
609 aligned_buf_end_off = HAMMER_ENCODE_RAW_BUFFER(volume->ondisk->vol_no,
610 (volume->ondisk->vol_buf_end - volume->ondisk->vol_buf_beg)
611 & ~HAMMER_BIGBLOCK_MASK64);
612 aligned_vol_end_off = (aligned_buf_end_off + HAMMER_BLOCKMAP_LAYER2_MASK)
613 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
616 * Iterate the volume's address space in chunks of 4 TB, where each
617 * chunk consists of at least one physically available 8 MB big-block.
619 * For each chunk we need one L1 entry and one L2 big-block.
620 * We use the first big-block of each chunk as L2 block.
622 for (phys_off = HAMMER_ENCODE_RAW_BUFFER(volume->ondisk->vol_no, 0);
623 phys_off < aligned_vol_end_off;
624 phys_off += HAMMER_BLOCKMAP_LAYER2) {
626 block_off < HAMMER_BLOCKMAP_LAYER2;
627 block_off += HAMMER_BIGBLOCK_SIZE) {
628 layer2_off = phys_off +
629 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_off);
630 layer2 = hammer_bread(hmp, layer2_off, &error, &buffer2);
634 error = callback(trans, volume, &buffer2, NULL,
635 layer2, phys_off, block_off, data);
640 layer1_off = freemap->phys_offset +
641 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_off);
642 layer1 = hammer_bread(hmp, layer1_off, &error, &buffer1);
646 error = callback(trans, volume, &buffer1, layer1, NULL,
654 hammer_rel_buffer(buffer1, 0);
656 hammer_rel_buffer(buffer2, 0);
662 hammer_format_volume_header(struct hammer_mount *hmp,
663 struct hammer_volume_ondisk *ondisk,
664 const char *vol_name, int vol_no, int vol_count,
665 int64_t vol_size, int64_t boot_area_size, int64_t mem_area_size)
669 KKASSERT(HAMMER_BUFSIZE >= sizeof(struct hammer_volume_ondisk));
671 bzero(ondisk, sizeof(struct hammer_volume_ondisk));
672 ksnprintf(ondisk->vol_name, sizeof(ondisk->vol_name), "%s", vol_name);
673 ondisk->vol_fstype = hmp->rootvol->ondisk->vol_fstype;
674 ondisk->vol_signature = HAMMER_FSBUF_VOLUME;
675 ondisk->vol_fsid = hmp->fsid;
676 ondisk->vol_rootvol = hmp->rootvol->vol_no;
677 ondisk->vol_no = vol_no;
678 ondisk->vol_count = vol_count;
679 ondisk->vol_version = hmp->version;
682 * Reserve space for (future) header junk, copy volume relative
683 * offset from the existing root volume.
685 vol_alloc = hmp->rootvol->ondisk->vol_bot_beg;
686 ondisk->vol_bot_beg = vol_alloc;
687 vol_alloc += boot_area_size;
688 ondisk->vol_mem_beg = vol_alloc;
689 vol_alloc += mem_area_size;
692 * The remaining area is the zone 2 buffer allocation area.
694 ondisk->vol_buf_beg = vol_alloc;
695 ondisk->vol_buf_end = vol_size & ~(int64_t)HAMMER_BUFMASK;
697 if (ondisk->vol_buf_end < ondisk->vol_buf_beg) {
698 hmkprintf(hmp, "volume %d %s is too small to hold the volume header\n",
699 ondisk->vol_no, ondisk->vol_name);
703 ondisk->vol_nblocks = (ondisk->vol_buf_end - ondisk->vol_buf_beg) /
705 ondisk->vol_blocksize = HAMMER_BUFSIZE;
710 hammer_update_volumes_header(hammer_transaction_t trans,
711 int64_t total_bigblocks, int64_t empty_bigblocks)
713 struct hammer_mount *hmp = trans->hmp;
714 struct mount *mp = hmp->mp;
715 hammer_volume_t volume;
720 * Set each volume's new value of the vol_count field.
722 HAMMER_VOLUME_NUMBER_FOREACH(hmp, vol_no) {
723 volume = hammer_get_volume(hmp, vol_no, &error);
724 KKASSERT(volume != NULL && error == 0);
725 hammer_modify_volume_field(trans, volume, vol_count);
726 volume->ondisk->vol_count = hmp->nvolumes;
727 hammer_modify_volume_done(volume);
730 * Only changes to the header of the root volume
731 * are automatically flushed to disk. For all
732 * other volumes that we modify we do it here.
734 * No interlock is needed, volume buffers are not
735 * messed with by bioops.
737 if (volume != trans->rootvol && volume->io.modified) {
738 hammer_crc_set_volume(volume->ondisk);
739 hammer_io_flush(&volume->io, 0);
742 hammer_rel_volume(volume, 0);
746 * Update the total number of big-blocks.
748 hammer_modify_volume_field(trans, trans->rootvol, vol0_stat_bigblocks);
749 trans->rootvol->ondisk->vol0_stat_bigblocks += total_bigblocks;
750 hammer_modify_volume_done(trans->rootvol);
753 * Big-block count changed so recompute the total number of blocks.
755 mp->mnt_stat.f_blocks = trans->rootvol->ondisk->vol0_stat_bigblocks *
756 HAMMER_BUFFERS_PER_BIGBLOCK;
757 mp->mnt_vstat.f_blocks = trans->rootvol->ondisk->vol0_stat_bigblocks *
758 HAMMER_BUFFERS_PER_BIGBLOCK;
761 * Update the total number of free big-blocks.
763 hammer_modify_volume_field(trans, trans->rootvol,
764 vol0_stat_freebigblocks);
765 trans->rootvol->ondisk->vol0_stat_freebigblocks += empty_bigblocks;
766 hammer_modify_volume_done(trans->rootvol);
769 * Update the copy in hmp.
771 hmp->copy_stat_freebigblocks =
772 trans->rootvol->ondisk->vol0_stat_freebigblocks;
778 * Count total big-blocks and empty big-blocks within the volume.
779 * The volume must be a non-root volume.
781 * Note that total big-blocks doesn't include big-blocks for layer2
782 * (and obviously layer1 and undomap). This is requirement of the
783 * volume header and this function is to retrieve that information.
786 hammer_count_bigblocks(hammer_mount_t hmp, hammer_volume_t volume,
787 int64_t *total_bigblocks, int64_t *empty_bigblocks)
789 struct hammer_volume_ondisk *ondisk;
790 hammer_blockmap_t freemap;
791 hammer_off_t phys_offset;
792 hammer_off_t block_offset;
793 hammer_off_t layer1_offset;
794 hammer_off_t layer2_offset;
795 hammer_off_t vol_free_end;
796 hammer_off_t aligned_vol_free_end;
797 struct hammer_blockmap_layer1 *layer1;
798 struct hammer_blockmap_layer2 *layer2;
799 hammer_buffer_t buffer1 = NULL;
800 hammer_buffer_t buffer2 = NULL;
801 int64_t vol_buf_size;
806 KKASSERT(volume->vol_no != HAMMER_ROOT_VOLNO);
808 ondisk = volume->ondisk;
809 vol_buf_size = ondisk->vol_buf_end - ondisk->vol_buf_beg;
810 vol_free_end = HAMMER_ENCODE_RAW_BUFFER(ondisk->vol_no,
811 vol_buf_size & ~HAMMER_BIGBLOCK_MASK64);
812 aligned_vol_free_end = (vol_free_end + HAMMER_BLOCKMAP_LAYER2_MASK)
813 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
815 freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
817 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->ondisk->vol_no, 0);
818 phys_offset < aligned_vol_free_end;
819 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
820 layer1_offset = freemap->phys_offset +
821 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
822 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
826 for (block_offset = 0;
827 block_offset < HAMMER_BLOCKMAP_LAYER2;
828 block_offset += HAMMER_BIGBLOCK_SIZE) {
829 layer2_offset = layer1->phys_offset +
830 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
831 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
835 switch (layer2->zone) {
836 case HAMMER_ZONE_UNDO_INDEX:
838 case HAMMER_ZONE_FREEMAP_INDEX:
839 case HAMMER_ZONE_UNAVAIL_INDEX:
842 KKASSERT(phys_offset + block_offset < aligned_vol_free_end);
844 if (layer2->append_off == 0 &&
845 layer2->bytes_free == HAMMER_BIGBLOCK_SIZE)
852 hmkprintf(hmp, "big-blocks total=%jd empty=%jd\n", total, empty);
853 *total_bigblocks = total;
854 *empty_bigblocks = empty;
857 hammer_rel_buffer(buffer1, 0);
859 hammer_rel_buffer(buffer2, 0);