Commit 0032a7a7 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Don't copy read delegation stateids in setattr 



The server will just return an NFS4ERR_OPENMODE anyway.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 2dc31756

fs/nfs/delegation.c

+10 −6
Original line number Diff line number Diff line
@@ -694,21 +694,25 @@ int nfs_delegations_present(struct nfs_client *clp) 
 * nfs4_copy_delegation_stateid - Copy inode's state ID information

 * @dst: stateid data structure to fill in

 * @inode: inode to check

 * @flags: delegation type requirement

 *

 * Returns one and fills in "dst->data" * if inode had a delegation,

 * otherwise zero is returned.

 * Returns "true" and fills in "dst->data" * if inode had a delegation,

 * otherwise "false" is returned.

 */

int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode)

bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode,

		fmode_t flags)

{

	struct nfs_inode *nfsi = NFS_I(inode);

	struct nfs_delegation *delegation;

	int ret = 0;

	bool ret;



	flags &= FMODE_READ|FMODE_WRITE;

	rcu_read_lock();

	delegation = rcu_dereference(nfsi->delegation);

	if (delegation != NULL) {

	ret = (delegation != NULL && (delegation->type & flags) == flags);

	if (ret) {

		nfs4_stateid_copy(dst, &delegation->stateid);

		ret = 1;

		nfs_mark_delegation_referenced(delegation);

	}

	rcu_read_unlock();

	return ret;

fs/nfs/delegation.h

+1 −1
Original line number Diff line number Diff line
@@ -54,7 +54,7 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp); 
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync);

int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);

int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);

int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode);

bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags);



void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);

int nfs_have_delegation(struct inode *inode, fmode_t flags);

fs/nfs/nfs4proc.c

+1 −1
Original line number Diff line number Diff line
@@ -1929,7 +1929,7 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 


	nfs_fattr_init(fattr);



	if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {

	if (nfs4_copy_delegation_stateid(&arg.stateid, inode, FMODE_WRITE)) {

		/* Use that stateid */

	} else if (state != NULL) {

		nfs4_select_rw_stateid(&arg.stateid, state, current->files, current->tgid);