We can use existing scrub_checksum_data() and scrub_checksum_tree_block()
for scrub_recheck_block_checksum(), instead of write duplicated code.
It is base on patch of:
setup all fields for sblock_to_check
which make this merge possible.
Signed-off-by: Zhao Lei <zhao...@cn.fujitsu.com>
---
fs/btrfs/scrub.c | 126 +++++++++++++++----------------------------------------
1 file changed, 34 insertions(+), 92 deletions(-)
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 4326e16..05dab4a 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -251,11 +251,7 @@ 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);
+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,
@@ -1506,9 +1502,6 @@ static void scrub_recheck_block(struct btrfs_fs_info
*fs_info,
int page_num;
sblock->no_io_error_seen = 1;
- sblock->header_error = 0;
- sblock->checksum_error = 0;
- sblock->generation_error = 0;
for (page_num = 0; page_num < sblock->page_count; page_num++) {
struct bio *bio;
@@ -1544,9 +1537,7 @@ static void scrub_recheck_block(struct btrfs_fs_info
*fs_info,
}
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;
}
@@ -1561,61 +1552,16 @@ static inline int scrub_check_fsid(u8 fsid[],
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,
@@ -1859,6 +1805,18 @@ static int scrub_checksum(struct scrub_block *sblock)
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;
@@ -1884,7 +1842,6 @@ static int scrub_checksum_data(struct scrub_block *sblock)
struct page *page;
void *buffer;
u32 crc = ~(u32)0;
- int fail = 0;
u64 len;
int index;
@@ -1915,9 +1872,9 @@ static int scrub_checksum_data(struct scrub_block *sblock)
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)
@@ -1933,8 +1890,6 @@ 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;
@@ -1949,19 +1904,20 @@ static int scrub_checksum_tree_block(struct scrub_block
*sblock)
* 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;
@@ -1986,9 +1942,9 @@ static int scrub_checksum_tree_block(struct scrub_block
*sblock)
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)
@@ -2202,28 +2158,14 @@ static void scrub_missing_raid56_worker(struct
btrfs_work *work)
{
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;
- sblock->header_error = 0;
- sblock->checksum_error = 0;
- sblock->generation_error = 0;
if (sblock->no_io_error_seen) {
- scrub_recheck_block_checksum(fs_info, sblock, is_metadata,
- have_csum, csum, generation,
- sctx->csum_size);
+ scrub_recheck_block_checksum(sblock);
}
if (!sblock->no_io_error_seen) {
--
1.8.5.1
--
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