CIFS: Add direct I/O functions to file_operations (be4eb688) · Commits · 戴 / test

With direct read/write functions implemented, add them to file_operations. Dircet I/O is used under two conditions: 1. When mounting with "cache=none", CIFS uses direct I/O for all user file data transfer. 2. When opening a file with O_DIRECT, CIFS uses direct I/O for all data transfer on this file. Signed-off-by:

Long Li <longli@microsoft.com> Signed-off-by:

Steve French <stfrench@microsoft.com> Reviewed-by:

Ronnie Sahlberg <lsahlber@redhat.com>

fs/cifs/cifsfs.c

+4 −6

Original line number	Diff line number	Diff line
		@@ -1180,9 +1180,8 @@ const struct file_operations cifs_file_strict_ops = {
		};

		const struct file_operations cifs_file_direct_ops = {
		/* BB reevaluate whether they can be done with directio, no cache */
		.read_iter = cifs_user_readv,
		.write_iter = cifs_user_writev,
		.read_iter = cifs_direct_readv,
		.write_iter = cifs_direct_writev,
		.open = cifs_open,
		.release = cifs_close,
		.lock = cifs_lock,
		@@ -1236,9 +1235,8 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
		};

		const struct file_operations cifs_file_direct_nobrl_ops = {
		/* BB reevaluate whether they can be done with directio, no cache */
		.read_iter = cifs_user_readv,
		.write_iter = cifs_user_writev,
		.read_iter = cifs_direct_readv,
		.write_iter = cifs_direct_writev,
		.open = cifs_open,
		.release = cifs_close,
		.fsync = cifs_fsync,

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