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Commit d4d9cdcb authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Don't hash the negative dentry when optimising for an O_EXCL open 



We don't want to leave an unverified hashed negative dentry if the
exclusive create fails to complete.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 5724ab37

fs/nfs/dir.c

+3 −2
Original line number Diff line number Diff line
@@ -992,9 +992,10 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry 
	}

	dentry->d_op = NFS_PROTO(dir)->dentry_ops;



	/* Let vfs_create() deal with O_EXCL */

	/* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash

	 * the dentry. */

	if (nd->intent.open.flags & O_EXCL) {

		d_add(dentry, NULL);

		d_instantiate(dentry, NULL);

		goto out;

	}

fs/nfs/nfs4proc.c

+2 −1
Original line number Diff line number Diff line
@@ -1879,11 +1879,12 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 
	}

	state = nfs4_do_open(dir, &path, flags, sattr, cred);

	put_rpccred(cred);

	d_drop(dentry);

	if (IS_ERR(state)) {

		status = PTR_ERR(state);

		goto out;

	}

	d_instantiate(dentry, igrab(state->inode));

	d_add(dentry, igrab(state->inode));

	if (flags & O_EXCL) {

		struct nfs_fattr fattr;

		status = nfs4_do_setattr(state->inode, &fattr, sattr, state);