vfs: create a generic checking function for FS_IOC_FSSETXATTR

Create a generic checking function for the incoming FS_IOC_FSSETXATTR
fsxattr values so that we can standardize some of the implementation
behaviors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jan Kara <jack@suse.cz>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 41d5175ffdd7..36f9691d7046 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3549,4 +3549,13 @@ static inline struct sock *io_uring_get_socket(struct file *file)
 int vfs_ioc_setflags_prepare(struct inode *inode, unsigned int oldflags,
 			     unsigned int flags);
 
+int vfs_ioc_fssetxattr_check(struct inode *inode, const struct fsxattr *old_fa,
+			     struct fsxattr *fa);
+
+static inline void simple_fill_fsxattr(struct fsxattr *fa, __u32 xflags)
+{
+	memset(fa, 0, sizeof(*fa));
+	fa->fsx_xflags = xflags;
+}
+
 #endif /* _LINUX_FS_H */