Commit ba7cf988 authored by Zhao Lei's avatar Zhao Lei Committed by Chris Mason

btrfs: Use scrub_checksum_data and scrub_checksum_tree_block for scrub_recheck_block_checksum

We can use existing scrub_checksum_data() and scrub_checksum_tree_block()
for scrub_recheck_block_checksum(), instead of write duplicated code.
Signed-off-by: default avatarZhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 772d233f
......@@ -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,
......@@ -1493,9 +1489,6 @@ 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;
......@@ -1531,9 +1524,7 @@ 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;
}
......@@ -1548,61 +1539,16 @@ 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,
......@@ -1846,6 +1792,18 @@ 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;
......@@ -1871,7 +1829,6 @@ 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;
......@@ -1902,9 +1859,9 @@ 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)
......@@ -1920,8 +1877,6 @@ 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;
......@@ -1936,19 +1891,20 @@ 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;
......@@ -1973,9 +1929,9 @@ 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)
......@@ -2189,42 +2145,28 @@ 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) {
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 {
......
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