All of lore.kernel.org
 help / color / mirror / Atom feed
From: Chuck Lever <chuck.lever@oracle.com>
To: trond.myklebust@netapp.com
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH 3/4] NFS: Introduce nfs_detach_delegations()
Date: Thu, 23 Dec 2010 16:54:35 -0500	[thread overview]
Message-ID: <20101223215435.2344.77114.stgit@matisse.1015granger.net> (raw)
In-Reply-To: <20101223214503.2344.79300.stgit@matisse.1015granger.net>

Clean up:  Refactor code that takes clp->cl_lock and calls
nfs_detach_delegations_locked() into its own function.

While we're changing the call sites, get rid of the second parameter
and the logic in nfs_detach_delegations_locked() that uses it, since
callers always set that parameter of nfs_detach_delegations_locked()
to NULL.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---

 fs/nfs/delegation.c |   41 ++++++++++++++++++++---------------------
 1 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 1fd62fc..521d71b 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -175,9 +175,9 @@ static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation
 	return inode;
 }
 
-static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfsi,
-							   const nfs4_stateid *stateid,
-							   struct nfs_client *clp)
+static struct nfs_delegation *
+nfs_detach_delegation_locked(struct nfs_inode *nfsi,
+			     struct nfs_client *clp)
 {
 	struct nfs_delegation *delegation =
 		rcu_dereference_protected(nfsi->delegation,
@@ -185,22 +185,29 @@ static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfs
 
 	if (delegation == NULL)
 		goto nomatch;
+
 	spin_lock(&delegation->lock);
-	if (stateid != NULL && memcmp(delegation->stateid.data, stateid->data,
-				sizeof(delegation->stateid.data)) != 0)
-		goto nomatch_unlock;
 	list_del_rcu(&delegation->super_list);
 	delegation->inode = NULL;
 	nfsi->delegation_state = 0;
 	rcu_assign_pointer(nfsi->delegation, NULL);
 	spin_unlock(&delegation->lock);
 	return delegation;
-nomatch_unlock:
-	spin_unlock(&delegation->lock);
 nomatch:
 	return NULL;
 }
 
+static struct nfs_delegation *nfs_detach_delegation(struct nfs_inode *nfsi,
+						    struct nfs_client *clp)
+{
+	struct nfs_delegation *delegation;
+
+	spin_lock(&clp->cl_lock);
+	delegation = nfs_detach_delegation_locked(nfsi, clp);
+	spin_unlock(&clp->cl_lock);
+	return delegation;
+}
+
 /*
  * Set up a delegation on an inode
  */
@@ -246,7 +253,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 			delegation = NULL;
 			goto out;
 		}
-		freeme = nfs_detach_delegation_locked(nfsi, NULL, clp);
+		freeme = nfs_detach_delegation_locked(nfsi, clp);
 	}
 	list_add_rcu(&delegation->super_list, &clp->cl_delegations);
 	nfsi->delegation_state = delegation->type;
@@ -307,9 +314,7 @@ restart:
 		inode = nfs_delegation_grab_inode(delegation);
 		if (inode == NULL)
 			continue;
-		spin_lock(&clp->cl_lock);
-		delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp);
-		spin_unlock(&clp->cl_lock);
+		delegation = nfs_detach_delegation(NFS_I(inode), clp);
 		rcu_read_unlock();
 		if (delegation != NULL) {
 			filemap_flush(inode->i_mapping);
@@ -338,9 +343,7 @@ void nfs_inode_return_delegation_noreclaim(struct inode *inode)
 	struct nfs_delegation *delegation;
 
 	if (rcu_access_pointer(nfsi->delegation) != NULL) {
-		spin_lock(&clp->cl_lock);
-		delegation = nfs_detach_delegation_locked(nfsi, NULL, clp);
-		spin_unlock(&clp->cl_lock);
+		delegation = nfs_detach_delegation(nfsi, clp);
 		if (delegation != NULL)
 			nfs_do_return_delegation(inode, delegation, 0);
 	}
@@ -354,9 +357,7 @@ int nfs_inode_return_delegation(struct inode *inode)
 	int err = 0;
 
 	if (rcu_access_pointer(nfsi->delegation) != NULL) {
-		spin_lock(&clp->cl_lock);
-		delegation = nfs_detach_delegation_locked(nfsi, NULL, clp);
-		spin_unlock(&clp->cl_lock);
+		delegation = nfs_detach_delegation(nfsi, clp);
 		if (delegation != NULL) {
 			nfs_wb_all(inode);
 			err = __nfs_inode_return_delegation(inode, delegation, 1);
@@ -530,9 +531,7 @@ restart:
 		inode = nfs_delegation_grab_inode(delegation);
 		if (inode == NULL)
 			continue;
-		spin_lock(&clp->cl_lock);
-		delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp);
-		spin_unlock(&clp->cl_lock);
+		delegation = nfs_detach_delegation(NFS_I(inode), clp);
 		rcu_read_unlock();
 		if (delegation != NULL)
 			nfs_free_delegation(delegation);


  parent reply	other threads:[~2010-12-23 21:54 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-23 21:54 [PATCH 0/4] Refactor data structures to support NFSv4 migration Chuck Lever
2010-12-23 21:54 ` [PATCH 1/4] NFS: Allow walking nfs_client.cl_superblocks list outside client.c Chuck Lever
2010-12-23 21:54 ` [PATCH 2/4] NFS: Move cl_state_owners and related fields to the nfs_server struct Chuck Lever
2010-12-23 22:04   ` Trond Myklebust
2010-12-23 22:49     ` Chuck Lever
2010-12-23 23:27       ` Trond Myklebust
2010-12-23 21:54 ` Chuck Lever [this message]
2010-12-23 21:54 ` [PATCH 4/4] NFS: Move cl_delegations " Chuck Lever
2010-12-23 22:09   ` Trond Myklebust
     [not found]     ` <1293142182.9718.3.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2010-12-23 22:14       ` Chuck Lever
2010-12-24  1:32 [PATCH 0/4] Refactor data structures to support NFSv4 migration (2) Chuck Lever
2010-12-24  1:32 ` [PATCH 3/4] NFS: Introduce nfs_detach_delegations() Chuck Lever

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20101223215435.2344.77114.stgit@matisse.1015granger.net \
    --to=chuck.lever@oracle.com \
    --cc=linux-nfs@vger.kernel.org \
    --cc=trond.myklebust@netapp.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.