diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-05-29 22:18:12 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-05-30 08:03:15 -0700 |
| commit | d25522f10cfa342a20867086a516c45c87b0877c (patch) | |
| tree | 1d8c66aeb7f9ed02c1247c258947abd2a38f1c4a /fs/xfs/libxfs/xfs_sb.c | |
| parent | 7e85bc6c873215f19a0b750febfb097d1f3c3292 (diff) | |
xfs: repair superblocks
If one of the backup superblocks is found to differ seriously from
superblock 0, write out a fresh copy from the in-core sb.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_sb.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_sb.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c index ea6c85a4c27c..d485e14313c6 100644 --- a/fs/xfs/libxfs/xfs_sb.c +++ b/fs/xfs/libxfs/xfs_sb.c @@ -1097,3 +1097,25 @@ xfs_sb_read_secondary( *bpp = bp; return 0; } + +/* Get an uninitialised secondary superblock buffer. */ +int +xfs_sb_get_secondary( + struct xfs_mount *mp, + struct xfs_trans *tp, + xfs_agnumber_t agno, + struct xfs_buf **bpp) +{ + struct xfs_buf *bp; + + ASSERT(agno != 0 && agno != NULLAGNUMBER); + bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, + XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), + XFS_FSS_TO_BB(mp, 1), 0); + if (!bp) + return -ENOMEM; + bp->b_ops = &xfs_sb_buf_ops; + xfs_buf_oneshot(bp); + *bpp = bp; + return 0; +} |