Encryption mode is unsupported when blocksize != pagesize.
Signed-off-by: Seunghun Lee <waydi1@xxxxxxxxx>
---
fs/ext4/super.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 31e85be..032c9e3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1583,6 +1583,15 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg);
} else if (token == Opt_test_dummy_encryption) {
#ifdef CONFIG_EXT4_FS_ENCRYPTION
+ int blocksize =
+ BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
+
+ if (blocksize != PAGE_CACHE_SIZE) {
+ ext4_msg(sb, KERN_ERR,
+ "unsupported blocksize for Test dummy encryption mode");
+ return -1;
+ }
+
sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION;
ext4_msg(sb, KERN_WARNING,
"Test dummy encryption mode enabled");
--
2.3.5
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