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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-01-03 09:55:24 +0100
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-01-06 14:58:46 -0500
commit58d9714a44a79bba9b414da3ffbf3c753dc5915f (patch)
tree623141f0a40a470c0c81c2edcd8c45c6b0daf4f9 /fs/nfs/delegation.c
parent5043e900f5404c01864fbeb5826aa7de3981bbc1 (diff)
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NFSv4: Send RENEW requests to the server only when we're holding state
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/delegation.c')
-rw-r--r--fs/nfs/delegation.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 618a327027b3..75dfb1c717a0 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -8,6 +8,7 @@
*/
#include <linux/config.h>
#include <linux/completion.h>
+#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
@@ -231,6 +232,51 @@ restart:
spin_unlock(&clp->cl_lock);
}
+int nfs_do_expire_all_delegations(void *ptr)
+{
+ struct nfs4_client *clp = ptr;
+ struct nfs_delegation *delegation;
+ struct inode *inode;
+ int err = 0;
+
+ allow_signal(SIGKILL);
+restart:
+ spin_lock(&clp->cl_lock);
+ if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) != 0)
+ goto out;
+ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
+ goto out;
+ list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
+ inode = igrab(delegation->inode);
+ if (inode == NULL)
+ continue;
+ spin_unlock(&clp->cl_lock);
+ err = nfs_inode_return_delegation(inode);
+ iput(inode);
+ if (!err)
+ goto restart;
+ }
+out:
+ spin_unlock(&clp->cl_lock);
+ nfs4_put_client(clp);
+ module_put_and_exit(0);
+}
+
+void nfs_expire_all_delegations(struct nfs4_client *clp)
+{
+ struct task_struct *task;
+
+ __module_get(THIS_MODULE);
+ atomic_inc(&clp->cl_count);
+ task = kthread_run(nfs_do_expire_all_delegations, clp,
+ "%u.%u.%u.%u-delegreturn",
+ NIPQUAD(clp->cl_addr));
+ if (!IS_ERR(task))
+ return;
+ nfs4_put_client(clp);
+ module_put(THIS_MODULE);
+}
+
/*
* Return all delegations following an NFS4ERR_CB_PATH_DOWN error.
*/