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Commit 5ddf1e0f authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

cifs: fix regression with O_EXCL creates and optimize away lookup 



cifs: fix regression with O_EXCL creates and optimize away lookup

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Tested-by: default avatarShirish Pargaonkar <shirishp@gmail.com>
CC: Stable Kernel <stable@kernel.org>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent cc0bad75

fs/cifs/dir.c

+9 −0
Original line number Diff line number Diff line
@@ -643,6 +643,15 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, 
			}

	}



	/*

	 * O_EXCL: optimize away the lookup, but don't hash the dentry. Let

	 * the VFS handle the create.

	 */

	if (nd->flags & LOOKUP_EXCL) {

		d_instantiate(direntry, NULL);

		return 0;

	}



	/* can not grab the rename sem here since it would

	deadlock in the cases (beginning of sys_rename itself)

	in which we already have the sb rename sem */