diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/btrfs_inode.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 38 |
2 files changed, 40 insertions, 0 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 195c09e20609..3faabcef9898 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -423,6 +423,8 @@ int btrfs_check_sector_csum(struct btrfs_fs_info *fs_info, struct page *page, u32 pgoff, u8 *csum, const u8 * const csum_expected); int btrfs_check_data_csum(struct btrfs_inode *inode, struct btrfs_bio *bbio, u32 bio_offset, struct page *page, u32 pgoff); +bool btrfs_data_csum_ok(struct btrfs_bio *bbio, struct btrfs_device *dev, + u32 bio_offset, struct bio_vec *bv); unsigned int btrfs_verify_data_csum(struct btrfs_bio *bbio, u32 bio_offset, struct page *page, u64 start, u64 end); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 598897b0d661..ba90f90e3d87 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3496,6 +3496,44 @@ zeroit: } /* + * Verify the checksum of a single data sector. + * + * @bbio: btrfs_io_bio which contains the csum + * @dev: device the sector is on + * @bio_offset: offset to the beginning of the bio (in bytes) + * @bv: bio_vec to check + * + * Check if the checksum on a data block is valid. When a checksum mismatch is + * detected, report the error and fill the corrupted range with zero. + * + * Return %true if the sector is ok or had no checksum to start with, else %false. + */ +bool btrfs_data_csum_ok(struct btrfs_bio *bbio, struct btrfs_device *dev, + u32 bio_offset, struct bio_vec *bv) +{ + struct btrfs_inode *inode = bbio->inode; + u64 file_offset = bbio->file_offset + bio_offset; + u64 end = file_offset + bv->bv_len - 1; + + if (!bbio->csum) + return true; + + if (btrfs_is_data_reloc_root(inode->root) && + test_range_bit(&inode->io_tree, file_offset, end, EXTENT_NODATASUM, + 1, NULL)) { + /* Skip the range without csum for data reloc inode */ + clear_extent_bits(&inode->io_tree, file_offset, end, + EXTENT_NODATASUM); + return true; + } + + if (btrfs_check_data_csum(inode, bbio, bio_offset, bv->bv_page, + bv->bv_offset) < 0) + return false; + return true; +} + +/* * When reads are done, we need to check csums to verify the data is correct. * if there's a match, we allow the bio to finish. If not, the code in * extent_io.c will try to find good copies for us. |