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authorTheodore Ts'o <tytso@mit.edu>2021-04-17 23:03:50 -0400
committerTheodore Ts'o <tytso@mit.edu>2021-04-17 23:03:50 -0400
commit5afa7e8b70d65819245fece61a65fd753b4aae33 (patch)
treedaf9ece96b42491f96e6f7a9157cd0779acd01c3 /fs/stat.c
parent4811d9929cdae4238baf5b2522247bd2f9fa7b50 (diff)
downloadlinux-5afa7e8b70d65819245fece61a65fd753b4aae33.tar.bz2
fs: fix reporting supported extra file attributes for statx()
statx(2) notes that any attribute that is not indicated as supported by stx_attributes_mask has no usable value. Commits 801e523796004 ("fs: move generic stat response attr handling to vfs_getattr_nosec") and 712b2698e4c02 ("fs/stat: Define DAX statx attribute") sets STATX_ATTR_AUTOMOUNT and STATX_ATTR_DAX, respectively, without setting stx_attributes_mask, which can cause xfstests generic/532 to fail. Fix this in the same way as commit 1b9598c8fb99 ("xfs: fix reporting supported extra file attributes for statx()") Fixes: 801e523796004 ("fs: move generic stat response attr handling to vfs_getattr_nosec") Fixes: 712b2698e4c02 ("fs/stat: Define DAX statx attribute") Cc: stable@kernel.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/stat.c')
-rw-r--r--fs/stat.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/stat.c b/fs/stat.c
index fbc171d038aa..1fa38bdec1a6 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -86,12 +86,20 @@ int vfs_getattr_nosec(const struct path *path, struct kstat *stat,
/* SB_NOATIME means filesystem supplies dummy atime value */
if (inode->i_sb->s_flags & SB_NOATIME)
stat->result_mask &= ~STATX_ATIME;
+
+ /*
+ * Note: If you add another clause to set an attribute flag, please
+ * update attributes_mask below.
+ */
if (IS_AUTOMOUNT(inode))
stat->attributes |= STATX_ATTR_AUTOMOUNT;
if (IS_DAX(inode))
stat->attributes |= STATX_ATTR_DAX;
+ stat->attributes_mask |= (STATX_ATTR_AUTOMOUNT |
+ STATX_ATTR_DAX);
+
mnt_userns = mnt_user_ns(path->mnt);
if (inode->i_op->getattr)
return inode->i_op->getattr(mnt_userns, path, stat,