Now that we have the code to support encryption for subpage-sized
blocks, this commit removes the conditional check in filesystem mount
code.
The commit also changes the support statement in
Documentation/filesystems/fscrypt.rst to reflect the fact that
encryption of filesystems with blocksize less than page size now works.
Signed-off-by: Chandan Rajendra <chandan@xxxxxxxxxxxxx>
---
Documentation/filesystems/fscrypt.rst | 4 ++--
fs/ext4/super.c | 7 -------
2 files changed, 2 insertions(+), 9 deletions(-)
diff --git a/Documentation/filesystems/fscrypt.rst b/Documentation/filesystems/fscrypt.rst
index 08c23b60e016..c3efe86bf2b2 100644
--- a/Documentation/filesystems/fscrypt.rst
+++ b/Documentation/filesystems/fscrypt.rst
@@ -213,8 +213,8 @@ Contents encryption
-------------------
For file contents, each filesystem block is encrypted independently.
-Currently, only the case where the filesystem block size is equal to
-the system's page size (usually 4096 bytes) is supported.
+Starting from Linux kernel 5.4, encryption of filesystems with block
+size less than system's page size is supported.
Each block's IV is set to the logical block number within the file as
a little endian number, except that:
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 5b92054bf8ea..d580e71ad9c7 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4322,13 +4322,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
}
- if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) &&
- (blocksize != PAGE_SIZE)) {
- ext4_msg(sb, KERN_ERR,
- "Unsupported blocksize for fs encryption");
- goto failed_mount_wq;
- }
-
if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) &&
!ext4_has_feature_encrypt(sb)) {
ext4_set_feature_encrypt(sb);
--
2.19.1
