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-rw-r--r--fs/nfs/delegation.c97
-rw-r--r--fs/nfs/delegation.h8
-rw-r--r--fs/nfs/super.c2
3 files changed, 52 insertions, 55 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index ebc06f2da31..bc9d4f9a788 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -256,6 +256,34 @@ static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegat
}
/*
+ * Return all delegations that have been marked for return
+ */
+static void nfs_client_return_marked_delegations(struct nfs_client *clp)
+{
+ struct nfs_delegation *delegation;
+ struct inode *inode;
+
+restart:
+ rcu_read_lock();
+ list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
+ if (!test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags))
+ continue;
+ inode = nfs_delegation_grab_inode(delegation);
+ if (inode == NULL)
+ continue;
+ spin_lock(&clp->cl_lock);
+ delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
+ spin_unlock(&clp->cl_lock);
+ rcu_read_unlock();
+ if (delegation != NULL)
+ __nfs_inode_return_delegation(inode, delegation);
+ iput(inode);
+ goto restart;
+ }
+ rcu_read_unlock();
+}
+
+/*
* This function returns the delegation without reclaiming opens
* or protecting against delegation reclaims.
* It is therefore really only safe to be called from
@@ -296,63 +324,46 @@ int nfs_inode_return_delegation(struct inode *inode)
/*
* Return all delegations associated to a super block
*/
-void nfs_return_all_delegations(struct super_block *sb)
+void nfs_super_return_all_delegations(struct super_block *sb)
{
struct nfs_client *clp = NFS_SB(sb)->nfs_client;
struct nfs_delegation *delegation;
- struct inode *inode;
if (clp == NULL)
return;
-restart:
rcu_read_lock();
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
- inode = NULL;
spin_lock(&delegation->lock);
if (delegation->inode != NULL && delegation->inode->i_sb == sb)
- inode = igrab(delegation->inode);
+ set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
spin_unlock(&delegation->lock);
- if (inode == NULL)
- continue;
- spin_lock(&clp->cl_lock);
- delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
- spin_unlock(&clp->cl_lock);
- rcu_read_unlock();
- if (delegation != NULL)
- __nfs_inode_return_delegation(inode, delegation);
- iput(inode);
- goto restart;
}
rcu_read_unlock();
+ nfs_client_return_marked_delegations(clp);
+}
+
+static void nfs_client_return_all_delegations(struct nfs_client *clp)
+{
+ struct nfs_delegation *delegation;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list)
+ set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
+ rcu_read_unlock();
+ nfs_client_return_marked_delegations(clp);
}
static int nfs_do_expire_all_delegations(void *ptr)
{
struct nfs_client *clp = ptr;
- struct nfs_delegation *delegation;
- struct inode *inode;
allow_signal(SIGKILL);
-restart:
+
if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) != 0)
goto out;
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
goto out;
- rcu_read_lock();
- list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
- inode = nfs_delegation_grab_inode(delegation);
- if (inode == NULL)
- continue;
- spin_lock(&clp->cl_lock);
- delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
- spin_unlock(&clp->cl_lock);
- rcu_read_unlock();
- if (delegation)
- __nfs_inode_return_delegation(inode, delegation);
- iput(inode);
- goto restart;
- }
- rcu_read_unlock();
+ nfs_client_return_all_delegations(clp);
out:
nfs_put_client(clp);
module_put_and_exit(0);
@@ -379,27 +390,9 @@ void nfs_expire_all_delegations(struct nfs_client *clp)
*/
void nfs_handle_cb_pathdown(struct nfs_client *clp)
{
- struct nfs_delegation *delegation;
- struct inode *inode;
-
if (clp == NULL)
return;
-restart:
- rcu_read_lock();
- list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
- inode = nfs_delegation_grab_inode(delegation);
- if (inode == NULL)
- continue;
- spin_lock(&clp->cl_lock);
- delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
- spin_unlock(&clp->cl_lock);
- rcu_read_unlock();
- if (delegation != NULL)
- __nfs_inode_return_delegation(inode, delegation);
- iput(inode);
- goto restart;
- }
- rcu_read_unlock();
+ nfs_client_return_all_delegations(clp);
}
struct recall_threadargs {
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 5e9f40e0a7d..c772bab12ee 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -20,12 +20,16 @@ struct nfs_delegation {
int type;
loff_t maxsize;
__u64 change_attr;
-#define NFS_DELEGATION_NEED_RECLAIM 0
unsigned long flags;
spinlock_t lock;
struct rcu_head rcu;
};
+enum {
+ NFS_DELEGATION_NEED_RECLAIM = 0,
+ NFS_DELEGATION_RETURN,
+};
+
int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
int nfs_inode_return_delegation(struct inode *inode);
@@ -33,7 +37,7 @@ int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *s
void nfs_inode_return_delegation_noreclaim(struct inode *inode);
struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
-void nfs_return_all_delegations(struct super_block *sb);
+void nfs_super_return_all_delegations(struct super_block *sb);
void nfs_expire_all_delegations(struct nfs_client *clp);
void nfs_handle_cb_pathdown(struct nfs_client *clp);
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index d8e062fe76b..bd4c3dd550d 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2433,7 +2433,7 @@ static void nfs4_kill_super(struct super_block *sb)
{
struct nfs_server *server = NFS_SB(sb);
- nfs_return_all_delegations(sb);
+ nfs_super_return_all_delegations(sb);
kill_anon_super(sb);
nfs4_renewd_prepare_shutdown(server);