On 29.03.2018 13:36, 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 <[email protected]> > v1->v2: > Fix commit indent reported by checkpatch.pl > Fix pr_err split string
The change log has to go below the scissors line. I guess it can be fixed at merge time so I don't think a resubmit is warranted. There is one nit below but I don't think it's critical so : Reviewed-by: Nikolay Borisov <[email protected]> > --- > fs/btrfs/disk-io.c | 25 ++++++++++++++----------- > 1 file changed, 14 insertions(+), 11 deletions(-) > > diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c > index b9b435579527..4c573602480c 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; > @@ -402,11 +403,8 @@ static int btrfs_check_super_csum(struct btrfs_fs_info > *fs_info, > u32 crc = ~(u32)0; > char result[sizeof(crc)]; > > - if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { > - btrfs_err(fs_info, "unsupported checksum algorithm %u", > - csum_type); > - return 1; > - } > + if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) > + return -EINVAL; > > /* > * The super_block structure does not span the whole > @@ -418,7 +416,7 @@ 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; > } > @@ -2570,9 +2568,14 @@ 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 > + pr_err("BTRFS error (device %pg): superblock checksum > mismatch", > + fs_devices->latest_bdev); nit: I think your initial version of specifically checking for EUCLEAN was better but I don't have strong preferences. > brelse(bh); > goto fail_alloc; > } > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
