ext4: add EXT4_JOURNAL_DATA_FL and EXT4_EXTENTS_FL to modifiable mask

Add EXT4_JOURNAL_DATA_FL and EXT4_EXTENTS_FL to EXT4_FL_USER_MODIFIABLE
to recognize that they are modifiable by userspace. So far we got away
without having them there because ext4_ioctl_setflags() treats them in a
special way. But it was really confusing like that.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index aff204f..6e8b8e3 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -397,7 +397,7 @@ struct flex_groups {
 #define EXT4_RESERVED_FL               0x80000000 /* reserved for ext4 lib */
 
 #define EXT4_FL_USER_VISIBLE           0x304BDFFF /* User visible flags */
-#define EXT4_FL_USER_MODIFIABLE                0x204380FF /* User modifiable flags */
+#define EXT4_FL_USER_MODIFIABLE                0x204BC0FF /* User modifiable flags */
 
 #define EXT4_FL_XFLAG_VISIBLE          (EXT4_SYNC_FL | \
                                         EXT4_IMMUTABLE_FL | \

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index fc1cd37..834a1c1 100644 (file)
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -268,6 +268,9 @@ static int ext4_ioctl_setflags(struct inode *inode,
        for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
                if (!(mask & EXT4_FL_USER_MODIFIABLE))
                        continue;
+               /* These flags get special treatment later */
+               if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
+                       continue;
                if (mask & flags)
                        ext4_set_inode_flag(inode, i);
                else