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authoryangerkun <yangerkun@huawei.com>2019-02-11 00:35:06 -0500
committerTheodore Ts'o <tytso@mit.edu>2019-02-11 00:35:06 -0500
commitabdc644e8cbac2e9b19763680e5a7cf9bab2bee7 (patch)
tree424a943d54e0881e475a91e18cfc00a575e055f1 /fs/ext4/ext4.h
parentaa507b5faf38784defe49f5e64605ac3c4425e26 (diff)
ext4: add mask of ext4 flags to swap
The reason is that while swapping two inode, we swap the flags too. Some flags such as EXT4_JOURNAL_DATA_FL can really confuse the things since we're not resetting the address operations structure. The simplest way to keep things sane is to restrict the flags that can be swapped. Signed-off-by: yangerkun <yangerkun@huawei.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 185a05d3257e..508a37ec9271 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -426,6 +426,9 @@ struct flex_groups {
/* Flags that are appropriate for non-directories/regular files. */
#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
+/* The only flags that should be swapped */
+#define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL)
+
/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
{