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 = (vol_free_end + HAMMER_BLOCKMAP_LAYER2_MASK)
407 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
409 freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
410 alloc_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
412 hmkprintf(hmp, "Initialize freemap volume %d\n", volume->vol_no);
414 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
415 phys_offset < aligned_vol_free_end;
416 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
417 layer1_offset = freemap->phys_offset +
418 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
419 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
422 if (layer1->phys_offset == HAMMER_BLOCKMAP_UNAVAIL) {
423 hammer_modify_buffer(trans, buffer1, layer1, sizeof(*layer1));
424 bzero(layer1, sizeof(*layer1));
425 layer1->phys_offset = alloc_offset;
426 layer1->blocks_free = 0;
427 hammer_crc_set_layer1(layer1);
428 hammer_modify_buffer_done(buffer1);
429 alloc_offset += HAMMER_BIGBLOCK_SIZE;
433 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
434 phys_offset < aligned_vol_free_end;
435 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
437 layer1_offset = freemap->phys_offset +
438 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
439 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
442 KKASSERT(layer1->phys_offset != HAMMER_BLOCKMAP_UNAVAIL);
444 for (block_offset = 0;
445 block_offset < HAMMER_BLOCKMAP_LAYER2;
446 block_offset += HAMMER_BIGBLOCK_SIZE) {
447 layer2_offset = layer1->phys_offset +
448 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
449 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
453 hammer_modify_buffer(trans, buffer2, layer2, sizeof(*layer2));
454 bzero(layer2, sizeof(*layer2));
456 if (phys_offset + block_offset < alloc_offset) {
457 layer2->zone = HAMMER_ZONE_FREEMAP_INDEX;
458 layer2->append_off = HAMMER_BIGBLOCK_SIZE;
459 layer2->bytes_free = 0;
460 } else if (phys_offset + block_offset < vol_free_end) {
462 layer2->append_off = 0;
463 layer2->bytes_free = HAMMER_BIGBLOCK_SIZE;
466 layer2->zone = HAMMER_ZONE_UNAVAIL_INDEX;
467 layer2->append_off = HAMMER_BIGBLOCK_SIZE;
468 layer2->bytes_free = 0;
471 hammer_crc_set_layer2(layer2);
472 hammer_modify_buffer_done(buffer2);
475 hammer_modify_buffer(trans, buffer1, layer1, sizeof(*layer1));
476 layer1->blocks_free += layer1_count;
477 hammer_crc_set_layer1(layer1);
478 hammer_modify_buffer_done(buffer1);
483 hammer_rel_buffer(buffer1, 0);
485 hammer_rel_buffer(buffer2, 0);
491 * XXX This somehow needs to stop doing hammer_modify_buffer() for
492 * layer2 entries. In theory removing a large block device could
493 * blow away UNDO fifo. The best way is to erase layer2 entries
494 * in userspace without UNDO getting involved after the device has
495 * been safely removed from the filesystem. HAMMER has no interest
496 * in what happens to the device once it's safely removed.
499 hammer_free_freemap(hammer_transaction_t trans, hammer_volume_t volume)
501 hammer_mount_t hmp = trans->hmp;
502 hammer_volume_ondisk_t ondisk;
503 hammer_blockmap_t freemap;
504 hammer_off_t phys_offset;
505 hammer_off_t block_offset;
506 hammer_off_t layer1_offset;
507 hammer_off_t layer2_offset;
508 hammer_off_t vol_free_end;
509 hammer_off_t aligned_vol_free_end;
510 hammer_blockmap_layer1_t layer1;
511 hammer_blockmap_layer2_t layer2;
512 hammer_buffer_t buffer1 = NULL;
513 hammer_buffer_t buffer2 = NULL;
514 int64_t vol_buf_size;
517 KKASSERT(volume->vol_no != HAMMER_ROOT_VOLNO);
519 ondisk = volume->ondisk;
520 vol_buf_size = HAMMER_VOL_BUF_SIZE(ondisk);
521 KKASSERT((vol_buf_size & ~HAMMER_OFF_SHORT_MASK) == 0);
522 vol_free_end = HAMMER_ENCODE_RAW_BUFFER(ondisk->vol_no,
523 vol_buf_size & ~HAMMER_BIGBLOCK_MASK64);
524 aligned_vol_free_end = (vol_free_end + HAMMER_BLOCKMAP_LAYER2_MASK)
525 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
527 freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
529 hmkprintf(hmp, "Free freemap volume %d\n", volume->vol_no);
531 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
532 phys_offset < aligned_vol_free_end;
533 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
534 layer1_offset = freemap->phys_offset +
535 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
536 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
539 KKASSERT(layer1->phys_offset != HAMMER_BLOCKMAP_UNAVAIL);
541 for (block_offset = 0;
542 block_offset < HAMMER_BLOCKMAP_LAYER2;
543 block_offset += HAMMER_BIGBLOCK_SIZE) {
544 layer2_offset = layer1->phys_offset +
545 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
546 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
550 switch (layer2->zone) {
551 case HAMMER_ZONE_UNDO_INDEX:
553 case HAMMER_ZONE_FREEMAP_INDEX:
554 case HAMMER_ZONE_UNAVAIL_INDEX:
557 KKASSERT(phys_offset + block_offset < aligned_vol_free_end);
558 if (layer2->append_off == 0 &&
559 layer2->bytes_free == HAMMER_BIGBLOCK_SIZE)
563 return EBUSY; /* Not empty */
567 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->vol_no, 0);
568 phys_offset < aligned_vol_free_end;
569 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
570 layer1_offset = freemap->phys_offset +
571 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
572 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
575 KKASSERT(layer1->phys_offset != HAMMER_BLOCKMAP_UNAVAIL);
577 for (block_offset = 0;
578 block_offset < HAMMER_BLOCKMAP_LAYER2;
579 block_offset += HAMMER_BIGBLOCK_SIZE) {
580 layer2_offset = layer1->phys_offset +
581 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
582 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
586 switch (layer2->zone) {
587 case HAMMER_ZONE_UNDO_INDEX:
590 KKASSERT(phys_offset + block_offset < aligned_vol_free_end);
591 hammer_modify_buffer(trans, buffer2, layer2, sizeof(*layer2));
592 bzero(layer2, sizeof(*layer2));
593 hammer_modify_buffer_done(buffer2);
598 hammer_modify_buffer(trans, buffer1, layer1, sizeof(*layer1));
599 bzero(layer1, sizeof(*layer1));
600 layer1->phys_offset = HAMMER_BLOCKMAP_UNAVAIL;
601 hammer_crc_set_layer1(layer1);
602 hammer_modify_buffer_done(buffer1);
607 hammer_rel_buffer(buffer1, 0);
609 hammer_rel_buffer(buffer2, 0);
615 hammer_format_volume_header(hammer_mount_t hmp,
616 struct hammer_ioc_volume *ioc,
617 hammer_volume_ondisk_t ondisk,
620 hammer_volume_ondisk_t root_ondisk;
623 KKASSERT(HAMMER_BUFSIZE >= sizeof(struct hammer_volume_ondisk));
626 * Just copy from the root volume header.
628 root_ondisk = hmp->rootvol->ondisk;
629 bzero(ondisk, sizeof(struct hammer_volume_ondisk));
630 ondisk->vol_fsid = root_ondisk->vol_fsid;
631 ondisk->vol_fstype = root_ondisk->vol_fstype;
632 ksnprintf(ondisk->vol_label, sizeof(ondisk->vol_label), "%s",
633 root_ondisk->vol_label);
634 ondisk->vol_version = root_ondisk->vol_version;
635 ondisk->vol_rootvol = root_ondisk->vol_no;
636 ondisk->vol_signature = root_ondisk->vol_signature;
638 KKASSERT(ondisk->vol_rootvol == HAMMER_ROOT_VOLNO);
639 KKASSERT(ondisk->vol_signature == HAMMER_FSBUF_VOLUME);
642 * Assign the new vol_no and vol_count.
644 ondisk->vol_no = vol_no;
645 ondisk->vol_count = root_ondisk->vol_count + 1;
648 * Reserve space for (future) header junk.
650 vol_alloc = root_ondisk->vol_bot_beg;
651 ondisk->vol_bot_beg = vol_alloc;
652 vol_alloc += ioc->boot_area_size;
653 ondisk->vol_mem_beg = vol_alloc;
654 vol_alloc += ioc->memory_log_size;
657 * The remaining area is the zone 2 buffer allocation area.
659 ondisk->vol_buf_beg = vol_alloc;
660 ondisk->vol_buf_end = ioc->vol_size & ~(int64_t)HAMMER_BUFMASK;
662 if (HAMMER_VOL_BUF_SIZE(ondisk) < 0) { /* int64_t */
663 hmkprintf(hmp, "volume %d is too small to hold the volume header\n",
672 hammer_update_volumes_header(hammer_transaction_t trans,
673 int64_t total_bigblocks, int64_t empty_bigblocks)
675 hammer_mount_t hmp = trans->hmp;
676 struct mount *mp = hmp->mp;
677 hammer_volume_t volume;
682 * Set each volume's new value of the vol_count field.
684 HAMMER_VOLUME_NUMBER_FOREACH(hmp, vol_no) {
685 volume = hammer_get_volume(hmp, vol_no, &error);
686 KKASSERT(volume != NULL && error == 0);
687 hammer_modify_volume_field(trans, volume, vol_count);
688 volume->ondisk->vol_count = hmp->nvolumes;
689 hammer_modify_volume_done(volume);
692 * Only changes to the header of the root volume
693 * are automatically flushed to disk. For all
694 * other volumes that we modify we do it here.
696 * No interlock is needed, volume buffers are not
697 * messed with by bioops.
699 if (volume != trans->rootvol && volume->io.modified) {
700 hammer_crc_set_volume(volume->ondisk);
701 hammer_io_flush(&volume->io, 0);
704 hammer_rel_volume(volume, 0);
708 * Update the total number of big-blocks.
710 hammer_modify_volume_field(trans, trans->rootvol, vol0_stat_bigblocks);
711 trans->rootvol->ondisk->vol0_stat_bigblocks += total_bigblocks;
712 hammer_modify_volume_done(trans->rootvol);
715 * Big-block count changed so recompute the total number of blocks.
717 mp->mnt_stat.f_blocks = trans->rootvol->ondisk->vol0_stat_bigblocks *
718 HAMMER_BUFFERS_PER_BIGBLOCK;
719 mp->mnt_vstat.f_blocks = trans->rootvol->ondisk->vol0_stat_bigblocks *
720 HAMMER_BUFFERS_PER_BIGBLOCK;
723 * Update the total number of free big-blocks.
725 hammer_modify_volume_field(trans, trans->rootvol,
726 vol0_stat_freebigblocks);
727 trans->rootvol->ondisk->vol0_stat_freebigblocks += empty_bigblocks;
728 hammer_modify_volume_done(trans->rootvol);
731 * Update the copy in hmp.
733 hmp->copy_stat_freebigblocks =
734 trans->rootvol->ondisk->vol0_stat_freebigblocks;
740 * Count total big-blocks and empty big-blocks within the volume.
741 * The volume must be a non-root volume.
743 * Note that total big-blocks doesn't include big-blocks for layer2
744 * (and obviously layer1 and undomap). This is requirement of the
745 * volume header and this function is to retrieve that information.
748 hammer_count_bigblocks(hammer_mount_t hmp, hammer_volume_t volume,
749 int64_t *total_bigblocks, int64_t *empty_bigblocks)
751 hammer_volume_ondisk_t ondisk;
752 hammer_blockmap_t freemap;
753 hammer_off_t phys_offset;
754 hammer_off_t block_offset;
755 hammer_off_t layer1_offset;
756 hammer_off_t layer2_offset;
757 hammer_off_t vol_free_end;
758 hammer_off_t aligned_vol_free_end;
759 hammer_blockmap_layer1_t layer1;
760 hammer_blockmap_layer2_t layer2;
761 hammer_buffer_t buffer1 = NULL;
762 hammer_buffer_t buffer2 = NULL;
763 int64_t vol_buf_size;
768 KKASSERT(volume->vol_no != HAMMER_ROOT_VOLNO);
770 *total_bigblocks = 0; /* avoid gcc warnings */
771 *empty_bigblocks = 0; /* avoid gcc warnings */
773 ondisk = volume->ondisk;
774 vol_buf_size = HAMMER_VOL_BUF_SIZE(ondisk);
775 KKASSERT((vol_buf_size & ~HAMMER_OFF_SHORT_MASK) == 0);
776 vol_free_end = HAMMER_ENCODE_RAW_BUFFER(ondisk->vol_no,
777 vol_buf_size & ~HAMMER_BIGBLOCK_MASK64);
778 aligned_vol_free_end = (vol_free_end + HAMMER_BLOCKMAP_LAYER2_MASK)
779 & ~HAMMER_BLOCKMAP_LAYER2_MASK;
781 freemap = &hmp->blockmap[HAMMER_ZONE_FREEMAP_INDEX];
783 for (phys_offset = HAMMER_ENCODE_RAW_BUFFER(volume->ondisk->vol_no, 0);
784 phys_offset < aligned_vol_free_end;
785 phys_offset += HAMMER_BLOCKMAP_LAYER2) {
786 layer1_offset = freemap->phys_offset +
787 HAMMER_BLOCKMAP_LAYER1_OFFSET(phys_offset);
788 layer1 = hammer_bread(hmp, layer1_offset, &error, &buffer1);
792 for (block_offset = 0;
793 block_offset < HAMMER_BLOCKMAP_LAYER2;
794 block_offset += HAMMER_BIGBLOCK_SIZE) {
795 layer2_offset = layer1->phys_offset +
796 HAMMER_BLOCKMAP_LAYER2_OFFSET(block_offset);
797 layer2 = hammer_bread(hmp, layer2_offset, &error, &buffer2);
801 switch (layer2->zone) {
802 case HAMMER_ZONE_UNDO_INDEX:
804 case HAMMER_ZONE_FREEMAP_INDEX:
805 case HAMMER_ZONE_UNAVAIL_INDEX:
808 KKASSERT(phys_offset + block_offset < aligned_vol_free_end);
810 if (layer2->append_off == 0 &&
811 layer2->bytes_free == HAMMER_BIGBLOCK_SIZE)
818 hmkprintf(hmp, "big-blocks total=%jd empty=%jd\n", total, empty);
819 *total_bigblocks = total;
820 *empty_bigblocks = empty;
823 hammer_rel_buffer(buffer1, 0);
825 hammer_rel_buffer(buffer2, 0);