2021-06-04 21:11:20

by Satya Tangirala

[permalink] [raw]
Subject: [PATCH v9 8/9] f2fs: support direct I/O with fscrypt using blk-crypto

From: Eric Biggers <[email protected]>

Wire up f2fs with fscrypt direct I/O support. direct I/O with fscrypt is
only supported through blk-crypto (i.e. CONFIG_BLK_INLINE_ENCRYPTION must
have been enabled, the 'inlinecrypt' mount option must have been specified,
and either hardware inline encryption support must be present or
CONFIG_BLK_INLINE_ENCYRPTION_FALLBACK must have been enabled). Further,
direct I/O on encrypted files is only supported when the *length* of the
I/O is aligned to the filesystem block size (which is *not* necessarily the
same as the block device's block size).

Signed-off-by: Eric Biggers <[email protected]>
Co-developed-by: Satya Tangirala <[email protected]>
Signed-off-by: Satya Tangirala <[email protected]>
Acked-by: Jaegeuk Kim <[email protected]>
fs/f2fs/f2fs.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index c83d90125ebd..a416ea3a1a04 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -4181,7 +4181,11 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
int rw = iov_iter_rw(iter);

- if (f2fs_post_read_required(inode))
+ if (!fscrypt_dio_supported(iocb, iter))
+ return true;
+ if (fsverity_active(inode))
+ return true;
+ if (f2fs_compressed_file(inode))
return true;
if (f2fs_is_multi_device(sbi))
return true;