linux-kernel - [RFC PATCH 6/7] f2fs: simplify f2fs_force_buffered

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Message-Id: <20220211061158.227688-7-ebiggers@kernel.org>
Date:   Thu, 10 Feb 2022 22:11:57 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-xfs@...r.kernel.org, linux-api@...r.kernel.org,
        linux-fscrypt@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 6/7] f2fs: simplify f2fs_force_buffered_io()

From: Eric Biggers <ebiggers@...gle.com>

f2fs only allows direct I/O that is aligned to the filesystem block
size.  Given that fact, simplify f2fs_force_buffered_io() by removing
the redundant call to block_unaligned_IO().

This makes it easier to reuse this code for STATX_IOALIGN.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 fs/f2fs/file.c | 24 ++++--------------------
 1 file changed, 4 insertions(+), 20 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 61ff0fc16e160..9cc985258f17e 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -807,19 +807,7 @@ int f2fs_truncate(struct inode *inode)
 	return 0;
 }
 
-static int block_unaligned_IO(struct inode *inode, struct kiocb *iocb,
-			      struct iov_iter *iter)
-{
-	unsigned int i_blkbits = READ_ONCE(inode->i_blkbits);
-	unsigned int blocksize_mask = (1 << i_blkbits) - 1;
-	loff_t offset = iocb->ki_pos;
-	unsigned long align = offset | iov_iter_alignment(iter);
-
-	return align & blocksize_mask;
-}
-
-static inline bool f2fs_force_buffered_io(struct inode *inode,
-				struct kiocb *iocb, struct iov_iter *iter)
+static bool f2fs_force_buffered_io(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 
@@ -839,12 +827,8 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
 	 */
 	if (f2fs_sb_has_blkzoned(sbi))
 		return true;
-	if (f2fs_lfs_mode(sbi)) {
-		if (block_unaligned_IO(inode, iocb, iter))
-			return true;
-		if (F2FS_IO_ALIGNED(sbi))
-			return true;
-	}
+	if (f2fs_lfs_mode(sbi) && F2FS_IO_ALIGNED(sbi))
+		return true;
 	if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED))
 		return true;
 
@@ -4280,7 +4264,7 @@ static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb,
 	if (!(iocb->ki_flags & IOCB_DIRECT))
 		return false;
 
-	if (f2fs_force_buffered_io(inode, iocb, iter))
+	if (f2fs_force_buffered_io(inode))
 		return false;
 
 	/*
-- 
2.35.1