f2fs: do not preallocate block unaligned to 4KB



Previously f2fs_preallocate_blocks() tries to allocate unaligned blocks.
In f2fs_write_begin(), however, prepare_write_begin() does not skip its
allocation due to (len != 4KB).
So, it needs locking node page twice unexpectedly.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 79344efb

fs/f2fs/data.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -582,8 +582,8 @@ ssize_t f2fs_preallocate_blocks(struct kiocb iocb, struct iov_iter from)
		struct f2fs_map_blocks map;
		ssize_t ret = 0;

		map.m_lblk = F2FS_BYTES_TO_BLK(iocb->ki_pos);
		map.m_len = F2FS_BLK_ALIGN(iov_iter_count(from));
		map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
		map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from));
		map.m_next_pgofs = NULL;

		if (f2fs_encrypted_inode(inode))