From f9fa87169d2bc1bf55ab42bb6085114378c53b86 Mon Sep 17 00:00:00 2001 From: Chandan Babu R Date: Fri, 22 Jan 2021 16:48:15 -0800 Subject: 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 Reviewed-by: Christoph Hellwig Reviewed-by: Allison Henderson Signed-off-by: Chandan Babu R Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_inode_fork.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'fs/xfs/libxfs/xfs_inode_fork.c') 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; -- cgit v1.2.3