Commit 13b502bb authored Jul 23, 2020 by Steve French Committed by Greg Kroah-Hartman Jul 31, 2020

Revert "cifs: Fix the target file was deleted when rename failed."



commit 0e6705182d4e1b77248a93470d6d7b3013d59b30 upstream.

This reverts commit 9ffad9263b467efd8f8dc7ae1941a0a655a2bab2.

Upon additional testing with older servers, it was found that
the original commit introduced a regression when using the old SMB1
dialect and rsyncing over an existing file.

The patch will need to be respun to address this, likely including
a larger refactoring of the SMB1 and SMB3 rename code paths to make
it less confusing and also to address some additional rename error
cases that SMB3 may be able to workaround.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reported-by: Patrick Fernie <patrick.fernie@gmail.com>
CC: Stable <stable@vger.kernel.org>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 41f5f86a

fs/cifs/inode.c

+2 −8

Original line number	Diff line number	Diff line
		@@ -1770,7 +1770,6 @@ cifs_rename2(struct inode source_dir, struct dentry source_dentry,
		FILE_UNIX_BASIC_INFO *info_buf_target;
		unsigned int xid;
		int rc, tmprc;
		bool new_target = d_really_is_negative(target_dentry);

		if (flags & ~RENAME_NOREPLACE)
		return -EINVAL;
		@@ -1847,13 +1846,8 @@ cifs_rename2(struct inode source_dir, struct dentry source_dentry,
		*/

		unlink_target:
		/*
		* If the target dentry was created during the rename, try
		* unlinking it if it's not negative
		*/
		if (new_target &&
		d_really_is_positive(target_dentry) &&
		(rc == -EACCES \|\| rc == -EEXIST)) {
		/* Try unlinking the target dentry if it's not negative */
		if (d_really_is_positive(target_dentry) && (rc == -EACCES \|\| rc == -EEXIST)) {
		if (d_is_dir(target_dentry))
		tmprc = cifs_rmdir(target_dir, target_dentry);
		else