diff options
| author | Chandan Babu R <chandanrlinux@gmail.com> | 2021-01-22 16:48:15 -0800 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-01-22 16:54:48 -0800 |
| commit | f9fa87169d2bc1bf55ab42bb6085114378c53b86 (patch) | |
| tree | 3631687fa6a9f5eba0b7bffa4b65a857ff30127a /fs/xfs/libxfs | |
| parent | bcc561f21f115437a010307420fc43d91be91c66 (diff) | |
xfs: Introduce error injection to reduce maximum inode fork extent count
This commit adds XFS_ERRTAG_REDUCE_MAX_IEXTENTS error tag which enables
userspace programs to test "Inode fork extent count overflow detection"
by reducing maximum possible inode fork extent count to 10.
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_errortag.h | 4 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.c | 4 |
2 files changed, 7 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_errortag.h b/fs/xfs/libxfs/xfs_errortag.h index 53b305dea381..1c56fcceeea6 100644 --- a/fs/xfs/libxfs/xfs_errortag.h +++ b/fs/xfs/libxfs/xfs_errortag.h @@ -56,7 +56,8 @@ #define XFS_ERRTAG_FORCE_SUMMARY_RECALC 33 #define XFS_ERRTAG_IUNLINK_FALLBACK 34 #define XFS_ERRTAG_BUF_IOERROR 35 -#define XFS_ERRTAG_MAX 36 +#define XFS_ERRTAG_REDUCE_MAX_IEXTENTS 36 +#define XFS_ERRTAG_MAX 37 /* * Random factors for above tags, 1 means always, 2 means 1/2 time, etc. @@ -97,5 +98,6 @@ #define XFS_RANDOM_FORCE_SUMMARY_RECALC 1 #define XFS_RANDOM_IUNLINK_FALLBACK (XFS_RANDOM_DEFAULT/10) #define XFS_RANDOM_BUF_IOERROR XFS_RANDOM_DEFAULT +#define XFS_RANDOM_REDUCE_MAX_IEXTENTS 1 #endif /* __XFS_ERRORTAG_H_ */ diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c index 8d48716547e5..e080d7e07643 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.c +++ b/fs/xfs/libxfs/xfs_inode_fork.c @@ -24,6 +24,7 @@ #include "xfs_dir2_priv.h" #include "xfs_attr_leaf.h" #include "xfs_types.h" +#include "xfs_errortag.h" kmem_zone_t *xfs_ifork_zone; @@ -745,6 +746,9 @@ xfs_iext_count_may_overflow( max_exts = (whichfork == XFS_ATTR_FORK) ? MAXAEXTNUM : MAXEXTNUM; + if (XFS_TEST_ERROR(false, ip->i_mount, XFS_ERRTAG_REDUCE_MAX_IEXTENTS)) + max_exts = 10; + nr_exts = ifp->if_nextents + nr_to_add; if (nr_exts < ifp->if_nextents || nr_exts > max_exts) return -EFBIG; |