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authorTrond Myklebust <Trond.Myklebust@netapp.com>2008-12-23 15:21:51 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-12-23 15:21:51 -0500
commit6411bd4a471893ab2af103d96253ba97c92d4777 (patch)
tree573c6a571d1dd500a98f51f3341d031354a17013 /fs/nfs
parentb0d3ded1a21dc3057daff5a488469d9e6aa1b567 (diff)
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NFSv4: Clean up the asynchronous delegation return
Reuse the state management thread in order to return delegations when we get a callback. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/delegation.c73
1 files changed, 19 insertions, 54 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 21eda6c..00c350c 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -321,6 +321,12 @@ int nfs_inode_return_delegation(struct inode *inode)
return err;
}
+static void nfs_mark_return_delegation(struct nfs_client *clp, struct nfs_delegation *delegation)
+{
+ set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
+ set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
+}
+
/*
* Return all delegations associated to a super block
*/
@@ -376,66 +382,25 @@ void nfs_handle_cb_pathdown(struct nfs_client *clp)
nfs_client_mark_return_all_delegations(clp);
}
-struct recall_threadargs {
- struct inode *inode;
- struct nfs_client *clp;
- const nfs4_stateid *stateid;
-
- struct completion started;
- int result;
-};
-
-static int recall_thread(void *data)
-{
- struct recall_threadargs *args = (struct recall_threadargs *)data;
- struct inode *inode = igrab(args->inode);
- struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
- struct nfs_inode *nfsi = NFS_I(inode);
- struct nfs_delegation *delegation;
-
- daemonize("nfsv4-delegreturn");
-
- nfs_msync_inode(inode);
- down_write(&nfsi->rwsem);
- spin_lock(&clp->cl_lock);
- delegation = nfs_detach_delegation_locked(nfsi, args->stateid);
- if (delegation != NULL)
- args->result = 0;
- else
- args->result = -ENOENT;
- spin_unlock(&clp->cl_lock);
- complete(&args->started);
- nfs_delegation_claim_opens(inode, args->stateid);
- up_write(&nfsi->rwsem);
- nfs_msync_inode(inode);
-
- if (delegation != NULL)
- nfs_do_return_delegation(inode, delegation, 1);
- iput(inode);
- module_put_and_exit(0);
-}
-
/*
* Asynchronous delegation recall!
*/
int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid)
{
- struct recall_threadargs data = {
- .inode = inode,
- .stateid = stateid,
- };
- int status;
+ struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
+ struct nfs_delegation *delegation;
- init_completion(&data.started);
- __module_get(THIS_MODULE);
- status = kernel_thread(recall_thread, &data, CLONE_KERNEL);
- if (status < 0)
- goto out_module_put;
- wait_for_completion(&data.started);
- return data.result;
-out_module_put:
- module_put(THIS_MODULE);
- return status;
+ rcu_read_lock();
+ delegation = rcu_dereference(NFS_I(inode)->delegation);
+ if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data,
+ sizeof(delegation->stateid.data)) != 0) {
+ rcu_read_unlock();
+ return -ENOENT;
+ }
+ nfs_mark_return_delegation(clp, delegation);
+ rcu_read_unlock();
+ nfs_delegation_run_state_manager(clp);
+ return 0;
}
/*