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| author | Dave Chinner | 2013-04-03 07:11:32 +0200 |
|---|---|---|
| committer | Ben Myers | 2013-04-27 20:05:18 +0200 |
| commit | e721f504cf46a0c84741ba2137d7a052d79436db (patch) | |
| tree | dd9d92321068cab132cecebc4abb9c6489e36986 /fs/xfs/xfs_log_recover.c | |
| parent | xfs: add CRC checks to the superblock (diff) | |
| download | kernel-qcow2-linux-e721f504cf46a0c84741ba2137d7a052d79436db.tar.gz kernel-qcow2-linux-e721f504cf46a0c84741ba2137d7a052d79436db.tar.xz kernel-qcow2-linux-e721f504cf46a0c84741ba2137d7a052d79436db.zip | |
xfs: implement extended feature masks
The version 5 superblock has extended feature masks for compatible,
incompatible and read-only compatible feature sets. Implement the
masking and mount-time checking for these feature masks.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_log_recover.c')
| -rw-r--r-- | fs/xfs/xfs_log_recover.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 5303b3db3c98..35ac5044ddfd 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -3959,6 +3959,25 @@ xlog_recover( return error; } + /* + * Version 5 superblock log feature mask validation. We know the + * log is dirty so check if there are any unknown log features + * in what we need to recover. If there are unknown features + * (e.g. unsupported transactions, then simply reject the + * attempt at recovery before touching anything. + */ + if (XFS_SB_VERSION_NUM(&log->l_mp->m_sb) == XFS_SB_VERSION_5 && + xfs_sb_has_incompat_log_feature(&log->l_mp->m_sb, + XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { + xfs_warn(log->l_mp, +"Superblock has unknown incompatible log features (0x%x) enabled.\n" +"The log can not be fully and/or safely recovered by this kernel.\n" +"Please recover the log on a kernel that supports the unknown features.", + (log->l_mp->m_sb.sb_features_log_incompat & + XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); + return EINVAL; + } + xfs_notice(log->l_mp, "Starting recovery (logdev: %s)", log->l_mp->m_logname ? log->l_mp->m_logname : "internal"); |