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From: Trond Myklebust <trond.myklebust@primarydata.com>
To: anna.schumaker@netapp.com
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH 4/7] NFSv4.x: Allow callers of nfs_remove_bad_delegation() to specify a stateid
Date: Tue, 30 Aug 2016 22:11:41 -0400	[thread overview]
Message-ID: <1472609504-69094-5-git-send-email-trond.myklebust@primarydata.com> (raw)
In-Reply-To: <1472609504-69094-4-git-send-email-trond.myklebust@primarydata.com>

Allow the callers of nfs_remove_bad_delegation() to specify the stateid
that needs to be marked as bad.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfs/delegation.c                    | 30 +++++++++++++++++++++++-------
 fs/nfs/delegation.h                    |  2 +-
 fs/nfs/flexfilelayout/flexfilelayout.c |  2 +-
 fs/nfs/nfs4proc.c                      | 14 ++++++++------
 4 files changed, 33 insertions(+), 15 deletions(-)

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 322c2585bc34..76dc11ecdedd 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -642,23 +642,39 @@ static void nfs_client_mark_return_unused_delegation_types(struct nfs_client *cl
 	rcu_read_unlock();
 }
 
-static void nfs_revoke_delegation(struct inode *inode)
+static void nfs_mark_delegation_revoked(struct nfs_server *server,
+		struct nfs_delegation *delegation)
+{
+	set_bit(NFS_DELEGATION_REVOKED, &delegation->flags);
+	nfs_mark_return_delegation(server, delegation);
+}
+
+static bool nfs_revoke_delegation(struct inode *inode,
+		const nfs4_stateid *stateid)
 {
 	struct nfs_delegation *delegation;
+	bool ret = false;
+
 	rcu_read_lock();
 	delegation = rcu_dereference(NFS_I(inode)->delegation);
-	if (delegation != NULL) {
-		set_bit(NFS_DELEGATION_REVOKED, &delegation->flags);
-		nfs_mark_return_delegation(NFS_SERVER(inode), delegation);
-	}
+	if (delegation == NULL)
+		goto out;
+	if (stateid && !nfs4_stateid_match(stateid, &delegation->stateid))
+		goto out;
+	nfs_mark_delegation_revoked(NFS_SERVER(inode), delegation);
+	ret = true;
+out:
 	rcu_read_unlock();
+	return ret;
 }
 
-void nfs_remove_bad_delegation(struct inode *inode)
+void nfs_remove_bad_delegation(struct inode *inode,
+		const nfs4_stateid *stateid)
 {
 	struct nfs_delegation *delegation;
 
-	nfs_revoke_delegation(inode);
+	if (!nfs_revoke_delegation(inode, stateid))
+		return;
 	delegation = nfs_inode_detach_delegation(inode);
 	if (delegation) {
 		nfs_inode_find_state_and_recover(inode, &delegation->stateid);
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 64724d252a79..d40827af5913 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -47,7 +47,7 @@ void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags);
 void nfs_expire_unreferenced_delegations(struct nfs_client *clp);
 int nfs_client_return_marked_delegations(struct nfs_client *clp);
 int nfs_delegations_present(struct nfs_client *clp);
-void nfs_remove_bad_delegation(struct inode *inode);
+void nfs_remove_bad_delegation(struct inode *inode, const nfs4_stateid *stateid);
 
 void nfs_delegation_mark_reclaim(struct nfs_client *clp);
 void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 51b51369704c..98ace127bf86 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1080,7 +1080,7 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
 	case -NFS4ERR_BAD_STATEID:
 		if (state == NULL)
 			break;
-		nfs_remove_bad_delegation(state->inode);
+		nfs_remove_bad_delegation(state->inode, NULL);
 	case -NFS4ERR_OPENMODE:
 		if (state == NULL)
 			break;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 13640bb3dcfb..e980117b7973 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2382,9 +2382,10 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta
 	return ret;
 }
 
-static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
+static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
+		const nfs4_stateid *stateid)
 {
-	nfs_remove_bad_delegation(state->inode);
+	nfs_remove_bad_delegation(state->inode, stateid);
 	write_seqlock(&state->seqlock);
 	nfs4_stateid_copy(&state->stateid, &state->open_stateid);
 	write_sequnlock(&state->seqlock);
@@ -2394,7 +2395,7 @@ static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
 {
 	if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
-		nfs_finish_clear_delegation_stateid(state);
+		nfs_finish_clear_delegation_stateid(state, NULL);
 }
 
 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
@@ -2440,19 +2441,20 @@ static void nfs41_check_delegation_stateid(struct nfs4_state *state)
 		rcu_read_unlock();
 		return;
 	}
+
+	nfs4_stateid_copy(&stateid, &delegation->stateid);
 	if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
 		rcu_read_unlock();
-		nfs_finish_clear_delegation_stateid(state);
+		nfs_finish_clear_delegation_stateid(state, &stateid);
 		return;
 	}
 
-	nfs4_stateid_copy(&stateid, &delegation->stateid);
 	cred = get_rpccred(delegation->cred);
 	rcu_read_unlock();
 	status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
 	trace_nfs4_test_delegation_stateid(state, NULL, status);
 	if (status != NFS_OK)
-		nfs_finish_clear_delegation_stateid(state);
+		nfs_finish_clear_delegation_stateid(state, &stateid);
 
 	put_rpccred(cred);
 }
-- 
2.7.4


  reply	other threads:[~2016-08-31  2:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-31  2:11 [PATCH 0/7] Fix delegation behaviour when server revokes some state Trond Myklebust
2016-08-31  2:11 ` [PATCH 1/7] NFSv4.1: Don't check delegations that are already marked as revoked Trond Myklebust
2016-08-31  2:11   ` [PATCH 2/7] NFSv4.1: Allow test_stateid to handle session errors without waiting Trond Myklebust
2016-08-31  2:11     ` [PATCH 3/7] NFSv4.1: Add a helper function to deal with expired stateids Trond Myklebust
2016-08-31  2:11       ` Trond Myklebust [this message]
2016-08-31  2:11         ` [PATCH 5/7] NFSv4.1: Test delegation stateids when server declares "some state revoked" Trond Myklebust
2016-08-31  2:11           ` [PATCH 6/7] NFSv4.1: Deal with server reboots during delegation expiration recovery Trond Myklebust
2016-08-31  2:11             ` [PATCH 7/7] NFSv4.1: Don't recheck delegations that have already been checked Trond Myklebust

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