fs: uapi: define verity bit for FS_IOC_GETFLAGS

Add FS_VERITY_FL to the flags for FS_IOC_GETFLAGS, so that applications
can easily determine whether a file is a verity file at the same time as
they're checking other file flags.  This flag will be gettable only;
FS_IOC_SETFLAGS won't allow setting it, since an ioctl must be used
instead to provide more parameters.

This flag matches the on-disk bit that was already allocated for ext4.

Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>

diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 59c71fa8c553a394d516502538c188aa01502e2c..df261b7e0587ed5cd84edf3850f83931b11ba573 100644 (file)
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -306,6 +306,7 @@ struct fscrypt_key {
 #define FS_TOPDIR_FL                   0x00020000 /* Top of directory hierarchies*/
 #define FS_HUGE_FILE_FL                        0x00040000 /* Reserved for ext4 */
 #define FS_EXTENT_FL                   0x00080000 /* Extents */
+#define FS_VERITY_FL                   0x00100000 /* Verity protected inode */
 #define FS_EA_INODE_FL                 0x00200000 /* Inode used for large EA */
 #define FS_EOFBLOCKS_FL                        0x00400000 /* Reserved for ext4 */
 #define FS_NOCOW_FL                    0x00800000 /* Do not cow file */