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| author | Ira Weiny <ira.weiny@intel.com> | 2020-05-28 16:59:56 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-05-29 04:09:47 +0200 |
| commit | 6c0d077ff8200a7b8e7131ca8e25315dec243a60 (patch) | |
| tree | a49d7225d9485cde40cf91364e7709b74e541b5b /Documentation | |
| parent | fs/ext4: Narrow scope of DAX check in setflags (diff) | |
| download | linux-6c0d077ff8200a7b8e7131ca8e25315dec243a60.tar.xz linux-6c0d077ff8200a7b8e7131ca8e25315dec243a60.zip | |
fs/ext4: Disallow verity if inode is DAX
Verity and DAX are incompatible. Changing the DAX mode due to a verity
flag change is wrong without a corresponding address_space_operations
update.
Make the 2 options mutually exclusive by returning an error if DAX was
set first.
(Setting DAX is already disabled if Verity is set first.)
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20200528150003.828793-3-ira.weiny@intel.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/ext4/verity.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/filesystems/ext4/verity.rst b/Documentation/filesystems/ext4/verity.rst index 3e4c0ee0e068..e99ff3fd09f7 100644 --- a/Documentation/filesystems/ext4/verity.rst +++ b/Documentation/filesystems/ext4/verity.rst @@ -39,3 +39,6 @@ is encrypted as well as the data itself. Verity files cannot have blocks allocated past the end of the verity metadata. + +Verity and DAX are not compatible and attempts to set both of these flags +on a file will fail. |