From: Eric Biggers <ebigg...@google.com>

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 <ebigg...@google.com>
Co-developed-by: Satya Tangirala <sat...@google.com>
Signed-off-by: Satya Tangirala <sat...@google.com>
Acked-by: Jaegeuk Kim <jaeg...@kernel.org>
---
 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 b35a50f4953c..978130b5a195 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -4082,7 +4082,11 @@ 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;
-- 
2.28.0.rc0.142.g3c755180ce-goog



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