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FROMLIST: f2fs: support direct I/O with fscrypt using blk-crypto 

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 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 <ebiggers@google.com>
Co-developed-by: Satya Tangirala <satyat@google.com>
Signed-off-by: Satya Tangirala <satyat@google.com>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>

Bug: 162255927
Link: https://lore.kernel.org/r/20200724184501.1651378-6-satyat@google.com
Change-Id: I2efde5aed559ba59f964d7d2e54f73414062daf8
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers 2020-07-24 18:44:59 +00:00 committed by Greg Kroah-Hartman
parent 328a492ae5
commit 9169a937f0
1 changed files with 5 additions and 1 deletions
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6
fs/f2fs/f2fs.h
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@ -4161,7 +4161,11 @@ 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;