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| author | Chandan Babu R <chandanrlinux@gmail.com> | 2021-01-23 03:48:15 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-01-23 03:54:48 +0300 |
| commit | f9fa87169d2bc1bf55ab42bb6085114378c53b86 (patch) | |
| tree | 3631687fa6a9f5eba0b7bffa4b65a857ff30127a /fs/xfs/libxfs/xfs_inode_fork.c | |
| parent | bcc561f21f115437a010307420fc43d91be91c66 (diff) | |
| download | linux-f9fa87169d2bc1bf55ab42bb6085114378c53b86.tar.xz | |
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/xfs_inode_fork.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.c | 4 |
1 files changed, 4 insertions, 0 deletions
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; |