static int scrub_setup_recheck_block(struct scrub_block *original_sblock,
struct scrub_block *sblocks_for_recheck);
static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock, int is_metadata,
- int have_csum, u8 *csum, u64 generation,
- u16 csum_size, int retry_failed_mirror);
-static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock,
- int is_metadata, int have_csum,
- const u8 *csum, u64 generation,
- u16 csum_size);
+ struct scrub_block *sblock,
+ int retry_failed_mirror);
+static void scrub_recheck_block_checksum(struct scrub_block *sblock);
static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad,
struct scrub_block *sblock_good);
static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
struct btrfs_fs_info *fs_info;
u64 length;
u64 logical;
- u64 generation;
unsigned int failed_mirror_index;
unsigned int is_metadata;
unsigned int have_csum;
- u8 *csum;
struct scrub_block *sblocks_for_recheck; /* holds one for each mirror */
struct scrub_block *sblock_bad;
int ret;
}
length = sblock_to_check->page_count * PAGE_SIZE;
logical = sblock_to_check->pagev[0]->logical;
- generation = sblock_to_check->pagev[0]->generation;
BUG_ON(sblock_to_check->pagev[0]->mirror_num < 1);
failed_mirror_index = sblock_to_check->pagev[0]->mirror_num - 1;
is_metadata = !(sblock_to_check->pagev[0]->flags &
BTRFS_EXTENT_FLAG_DATA);
have_csum = sblock_to_check->pagev[0]->have_csum;
- csum = sblock_to_check->pagev[0]->csum;
dev = sblock_to_check->pagev[0]->dev;
if (sctx->is_dev_replace && !is_metadata && !have_csum) {
sblock_bad = sblocks_for_recheck + failed_mirror_index;
/* build and submit the bios for the failed mirror, check checksums */
- scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum,
- csum, generation, sctx->csum_size, 1);
+ scrub_recheck_block(fs_info, sblock_bad, 1);
if (!sblock_bad->header_error && !sblock_bad->checksum_error &&
sblock_bad->no_io_error_seen) {
sblock_other = sblocks_for_recheck + mirror_index;
/* build and submit the bios, check checksums */
- scrub_recheck_block(fs_info, sblock_other, is_metadata,
- have_csum, csum, generation,
- sctx->csum_size, 0);
+ scrub_recheck_block(fs_info, sblock_other, 0);
if (!sblock_other->header_error &&
!sblock_other->checksum_error &&
* is verified, but most likely the data comes out
* of the page cache.
*/
- scrub_recheck_block(fs_info, sblock_bad,
- is_metadata, have_csum, csum,
- generation, sctx->csum_size, 1);
+ scrub_recheck_block(fs_info, sblock_bad, 1);
if (!sblock_bad->header_error &&
!sblock_bad->checksum_error &&
sblock_bad->no_io_error_seen)
struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
u64 length = original_sblock->page_count * PAGE_SIZE;
u64 logical = original_sblock->pagev[0]->logical;
+ u64 generation = original_sblock->pagev[0]->generation;
+ u64 flags = original_sblock->pagev[0]->flags;
+ u64 have_csum = original_sblock->pagev[0]->have_csum;
struct scrub_recover *recover;
struct btrfs_bio *bbio;
u64 sublen;
sblock = sblocks_for_recheck + mirror_index;
sblock->sctx = sctx;
+
page = kzalloc(sizeof(*page), GFP_NOFS);
if (!page) {
leave_nomem:
}
scrub_page_get(page);
sblock->pagev[page_index] = page;
+ page->sblock = sblock;
+ page->flags = flags;
+ page->generation = generation;
page->logical = logical;
+ page->have_csum = have_csum;
+ if (have_csum)
+ memcpy(page->csum,
+ original_sblock->pagev[0]->csum,
+ sctx->csum_size);
scrub_stripe_index_and_offset(logical,
bbio->map_type,
* the pages that are errored in the just handled mirror can be repaired.
*/
static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock, int is_metadata,
- int have_csum, u8 *csum, u64 generation,
- u16 csum_size, int retry_failed_mirror)
+ struct scrub_block *sblock,
+ int retry_failed_mirror)
{
int page_num;
sblock->no_io_error_seen = 1;
- sblock->header_error = 0;
- sblock->checksum_error = 0;
for (page_num = 0; page_num < sblock->page_count; page_num++) {
struct bio *bio;
}
if (sblock->no_io_error_seen)
- scrub_recheck_block_checksum(fs_info, sblock, is_metadata,
- have_csum, csum, generation,
- csum_size);
+ scrub_recheck_block_checksum(sblock);
return;
}
return !ret;
}
-static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock,
- int is_metadata, int have_csum,
- const u8 *csum, u64 generation,
- u16 csum_size)
+static void scrub_recheck_block_checksum(struct scrub_block *sblock)
{
- int page_num;
- u8 calculated_csum[BTRFS_CSUM_SIZE];
- u32 crc = ~(u32)0;
- void *mapped_buffer;
-
- WARN_ON(!sblock->pagev[0]->page);
- if (is_metadata) {
- struct btrfs_header *h;
-
- mapped_buffer = kmap_atomic(sblock->pagev[0]->page);
- h = (struct btrfs_header *)mapped_buffer;
-
- if (sblock->pagev[0]->logical != btrfs_stack_header_bytenr(h) ||
- !scrub_check_fsid(h->fsid, sblock->pagev[0]) ||
- memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,
- BTRFS_UUID_SIZE)) {
- sblock->header_error = 1;
- } else if (generation != btrfs_stack_header_generation(h)) {
- sblock->header_error = 1;
- sblock->generation_error = 1;
- }
- csum = h->csum;
- } else {
- if (!have_csum)
- return;
-
- mapped_buffer = kmap_atomic(sblock->pagev[0]->page);
- }
-
- for (page_num = 0;;) {
- if (page_num == 0 && is_metadata)
- crc = btrfs_csum_data(
- ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE,
- crc, PAGE_SIZE - BTRFS_CSUM_SIZE);
- else
- crc = btrfs_csum_data(mapped_buffer, crc, PAGE_SIZE);
-
- kunmap_atomic(mapped_buffer);
- page_num++;
- if (page_num >= sblock->page_count)
- break;
- WARN_ON(!sblock->pagev[page_num]->page);
-
- mapped_buffer = kmap_atomic(sblock->pagev[page_num]->page);
- }
+ sblock->header_error = 0;
+ sblock->checksum_error = 0;
+ sblock->generation_error = 0;
- btrfs_csum_final(crc, calculated_csum);
- if (memcmp(calculated_csum, csum, csum_size))
- sblock->checksum_error = 1;
+ if (sblock->pagev[0]->flags & BTRFS_EXTENT_FLAG_DATA)
+ scrub_checksum_data(sblock);
+ else
+ scrub_checksum_tree_block(sblock);
}
static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad,
u64 flags;
int ret;
+ /*
+ * No need to initialize these stats currently,
+ * because this function only use return value
+ * instead of these stats value.
+ *
+ * Todo:
+ * always use stats
+ */
+ sblock->header_error = 0;
+ sblock->generation_error = 0;
+ sblock->checksum_error = 0;
+
WARN_ON(sblock->page_count < 1);
flags = sblock->pagev[0]->flags;
ret = 0;
struct page *page;
void *buffer;
u32 crc = ~(u32)0;
- int fail = 0;
u64 len;
int index;
btrfs_csum_final(crc, csum);
if (memcmp(csum, on_disk_csum, sctx->csum_size))
- fail = 1;
+ sblock->checksum_error = 1;
- return fail;
+ return sblock->checksum_error;
}
static int scrub_checksum_tree_block(struct scrub_block *sblock)
u64 mapped_size;
void *p;
u32 crc = ~(u32)0;
- int fail = 0;
- int crc_fail = 0;
u64 len;
int index;
* a) don't have an extent buffer and
* b) the page is already kmapped
*/
-
if (sblock->pagev[0]->logical != btrfs_stack_header_bytenr(h))
- ++fail;
+ sblock->header_error = 1;
- if (sblock->pagev[0]->generation != btrfs_stack_header_generation(h))
- ++fail;
+ if (sblock->pagev[0]->generation != btrfs_stack_header_generation(h)) {
+ sblock->header_error = 1;
+ sblock->generation_error = 1;
+ }
if (!scrub_check_fsid(h->fsid, sblock->pagev[0]))
- ++fail;
+ sblock->header_error = 1;
if (memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,
BTRFS_UUID_SIZE))
- ++fail;
+ sblock->header_error = 1;
len = sctx->nodesize - BTRFS_CSUM_SIZE;
mapped_size = PAGE_SIZE - BTRFS_CSUM_SIZE;
btrfs_csum_final(crc, calculated_csum);
if (memcmp(calculated_csum, on_disk_csum, sctx->csum_size))
- ++crc_fail;
+ sblock->checksum_error = 1;
- return fail || crc_fail;
+ return sblock->header_error || sblock->checksum_error;
}
static int scrub_checksum_super(struct scrub_block *sblock)
{
struct scrub_block *sblock = container_of(work, struct scrub_block, work);
struct scrub_ctx *sctx = sblock->sctx;
- struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
- unsigned int is_metadata;
- unsigned int have_csum;
- u8 *csum;
- u64 generation;
u64 logical;
struct btrfs_device *dev;
- is_metadata = !(sblock->pagev[0]->flags & BTRFS_EXTENT_FLAG_DATA);
- have_csum = sblock->pagev[0]->have_csum;
- csum = sblock->pagev[0]->csum;
- generation = sblock->pagev[0]->generation;
logical = sblock->pagev[0]->logical;
dev = sblock->pagev[0]->dev;
- if (sblock->no_io_error_seen) {
- scrub_recheck_block_checksum(fs_info, sblock, is_metadata,
- have_csum, csum, generation,
- sctx->csum_size);
- }
+ if (sblock->no_io_error_seen)
+ scrub_recheck_block_checksum(sblock);
if (!sblock->no_io_error_seen) {
spin_lock(&sctx->stat_lock);
sctx->stat.read_errors++;
spin_unlock(&sctx->stat_lock);
- btrfs_err_rl_in_rcu(fs_info,
+ btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,
"IO error rebuilding logical %llu for dev %s",
logical, rcu_str_deref(dev->name));
} else if (sblock->header_error || sblock->checksum_error) {
spin_lock(&sctx->stat_lock);
sctx->stat.uncorrectable_errors++;
spin_unlock(&sctx->stat_lock);
- btrfs_err_rl_in_rcu(fs_info,
+ btrfs_err_rl_in_rcu(sctx->dev_root->fs_info,
"failed to rebuild valid logical %llu for dev %s",
logical, rcu_str_deref(dev->name));
} else {
}
}
-static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u64 len,
- u8 *csum)
+static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum)
{
struct btrfs_ordered_sum *sum = NULL;
unsigned long index;
if (flags & BTRFS_EXTENT_FLAG_DATA) {
/* push csums to sbio */
- have_csum = scrub_find_csum(sctx, logical, l, csum);
+ have_csum = scrub_find_csum(sctx, logical, csum);
if (have_csum == 0)
++sctx->stat.no_csum;
if (sctx->is_dev_replace && !have_csum) {
if (flags & BTRFS_EXTENT_FLAG_DATA) {
/* push csums to sbio */
- have_csum = scrub_find_csum(sctx, logical, l, csum);
+ have_csum = scrub_find_csum(sctx, logical, csum);
if (have_csum == 0)
goto skip;
}
logic_start + map->stripe_len)) {
btrfs_err(fs_info, "scrub: tree block %llu spanning stripes, ignored. logical=%llu",
key.objectid, logic_start);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
goto next;
}
again:
"scrub: tree block %llu spanning "
"stripes, ignored. logical=%llu",
key.objectid, logical);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
goto next;
}
static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx,
struct btrfs_device *scrub_dev,
u64 chunk_offset, u64 length,
- u64 dev_offset, int is_dev_replace)
+ u64 dev_offset,
+ struct btrfs_block_group_cache *cache,
+ int is_dev_replace)
{
struct btrfs_mapping_tree *map_tree =
&sctx->dev_root->fs_info->mapping_tree;
em = lookup_extent_mapping(&map_tree->map_tree, chunk_offset, 1);
read_unlock(&map_tree->map_tree.lock);
- if (!em)
- return -EINVAL;
+ if (!em) {
+ /*
+ * Might have been an unused block group deleted by the cleaner
+ * kthread or relocation.
+ */
+ spin_lock(&cache->lock);
+ if (!cache->removed)
+ ret = -EINVAL;
+ spin_unlock(&cache->lock);
+
+ return ret;
+ }
map = (struct map_lookup *)em->bdev;
if (em->start != chunk_offset)
u64 length;
u64 chunk_offset;
int ret = 0;
+ int ro_set;
int slot;
struct extent_buffer *l;
struct btrfs_key key;
scrub_pause_on(fs_info);
ret = btrfs_inc_block_group_ro(root, cache);
scrub_pause_off(fs_info);
- if (ret) {
+
+ if (ret == 0) {
+ ro_set = 1;
+ } else if (ret == -ENOSPC) {
+ /*
+ * btrfs_inc_block_group_ro return -ENOSPC when it
+ * failed in creating new chunk for metadata.
+ * It is not a problem for scrub/replace, because
+ * metadata are always cowed, and our scrub paused
+ * commit_transactions.
+ */
+ ro_set = 0;
+ } else {
+ btrfs_warn(fs_info, "failed setting block group ro, ret=%d\n",
+ ret);
btrfs_put_block_group(cache);
break;
}
dev_replace->cursor_left = found_key.offset;
dev_replace->item_needs_writeback = 1;
ret = scrub_chunk(sctx, scrub_dev, chunk_offset, length,
- found_key.offset, is_dev_replace);
+ found_key.offset, cache, is_dev_replace);
/*
* flush, submit all pending read and write bios, afterwards
scrub_pause_off(fs_info);
- btrfs_dec_block_group_ro(root, cache);
+ if (ro_set)
+ btrfs_dec_block_group_ro(root, cache);
+
+ /*
+ * We might have prevented the cleaner kthread from deleting
+ * this block group if it was already unused because we raced
+ * and set it to RO mode first. So add it back to the unused
+ * list, otherwise it might not ever be deleted unless a manual
+ * balance is triggered or it becomes used and unused again.
+ */
+ spin_lock(&cache->lock);
+ if (!cache->removed && !cache->ro && cache->reserved == 0 &&
+ btrfs_block_group_used(&cache->item) == 0) {
+ spin_unlock(&cache->lock);
+ spin_lock(&fs_info->unused_bgs_lock);
+ if (list_empty(&cache->bg_list)) {
+ btrfs_get_block_group(cache);
+ list_add_tail(&cache->bg_list,
+ &fs_info->unused_bgs);
+ }
+ spin_unlock(&fs_info->unused_bgs_lock);
+ } else {
+ spin_unlock(&cache->lock);
+ }
btrfs_put_block_group(cache);
if (ret)
projects / firefly-linux-kernel-4.4.55.git / blobdiff