On 21.03.2018 01:33, Anand Jain wrote: > Return the required -EINVAL and -EUCLEAN from the function > btrfs_check_super_csum(). And more the error log into the > parent function. > > Signed-off-by: Anand Jain <anand.j...@oracle.com> > --- > fs/btrfs/disk-io.c | 28 +++++++++++++++++----------- > 1 file changed, 17 insertions(+), 11 deletions(-) > > diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c > index 582ed6af3c50..4c6de2743250 100644 > --- a/fs/btrfs/disk-io.c > +++ b/fs/btrfs/disk-io.c > @@ -392,9 +392,10 @@ static int verify_parent_transid(struct extent_io_tree > *io_tree, > /* > * Return 0 if the superblock checksum type matches the checksum value of > that > * algorithm. Pass the raw disk superblock data. > + * Otherwise: -EINVAL if csum type is not found > + * -EUCLEAN if csum does not match > */ > -static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, > - char *raw_disk_sb) > +static int btrfs_check_super_csum(char *raw_disk_sb) > { > struct btrfs_super_block *disk_sb = > (struct btrfs_super_block *)raw_disk_sb; > @@ -403,11 +404,8 @@ static int btrfs_check_super_csum(struct btrfs_fs_info > *fs_info, > char result[sizeof(crc)]; > > /* We support csum type crc32 only as of now */ > - if (csum_type != BTRFS_CSUM_TYPE_CRC32) { > - btrfs_err(fs_info, "unsupported checksum algorithm %u", > - csum_type); > - return 1; > - } > + if (csum_type != BTRFS_CSUM_TYPE_CRC32) > + return -EINVAL; > > /* > * The super_block structure does not span the whole > @@ -419,7 +417,7 @@ static int btrfs_check_super_csum(struct btrfs_fs_info > *fs_info, > btrfs_csum_final(crc, result); > > if (memcmp(raw_disk_sb, result, sizeof(result))) > - return 1; > + return -EUCLEAN; > > return 0; > } > @@ -2571,9 +2569,17 @@ int open_ctree(struct super_block *sb, > * We want to check superblock checksum, the type is stored inside. > * Pass the whole disk block of size BTRFS_SUPER_INFO_SIZE (4k). > */ > - if (btrfs_check_super_csum(fs_info, bh->b_data)) { > - btrfs_err(fs_info, "superblock checksum mismatch"); > - err = -EINVAL; > + err = btrfs_check_super_csum(bh->b_data); > + if (err) { > + if (err == -EINVAL) > + pr_err("BTRFS error (device %pg): unsupported checksum > algorithm", > + fs_devices->latest_bdev); > + else if (err == -EUCLEAN) > + pr_err("BTRFS error (device %pg): superblock checksum > mismatch", > + fs_devices->latest_bdev); > + else > + pr_err("BTRFS error (device %pg): checksum check failed > %d", > + fs_devices->latest_bdev, err);
This is redundant, it's never going to be executed since only EINVAL/EUCLEAN is returned. > brelse(bh); > goto fail_alloc; > } > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html