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Diffstat (limited to 'fs/nfs/delegation.c')
-rw-r--r--fs/nfs/delegation.c77
1 files changed, 53 insertions, 24 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 6dd48a4405b4..2563bebc4c67 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -92,7 +92,7 @@ out:
return status;
}
-static void nfs_delegation_claim_opens(struct inode *inode, const nfs4_stateid *stateid)
+static int nfs_delegation_claim_opens(struct inode *inode, const nfs4_stateid *stateid)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_open_context *ctx;
@@ -116,10 +116,11 @@ again:
err = nfs_delegation_claim_locks(ctx, state);
put_nfs_open_context(ctx);
if (err != 0)
- return;
+ return err;
goto again;
}
spin_unlock(&inode->i_lock);
+ return 0;
}
/*
@@ -261,30 +262,34 @@ static void nfs_msync_inode(struct inode *inode)
/*
* Basic procedure for returning a delegation to the server
*/
-static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegation *delegation)
+static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegation *delegation, int issync)
{
struct nfs_inode *nfsi = NFS_I(inode);
+ int err;
- nfs_msync_inode(inode);
/*
* Guard against new delegated open/lock/unlock calls and against
* state recovery
*/
down_write(&nfsi->rwsem);
- nfs_delegation_claim_opens(inode, &delegation->stateid);
+ err = nfs_delegation_claim_opens(inode, &delegation->stateid);
up_write(&nfsi->rwsem);
- nfs_msync_inode(inode);
+ if (err)
+ goto out;
- return nfs_do_return_delegation(inode, delegation, 1);
+ err = nfs_do_return_delegation(inode, delegation, issync);
+out:
+ return err;
}
/*
* Return all delegations that have been marked for return
*/
-void nfs_client_return_marked_delegations(struct nfs_client *clp)
+int nfs_client_return_marked_delegations(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
struct inode *inode;
+ int err = 0;
restart:
rcu_read_lock();
@@ -298,12 +303,18 @@ restart:
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);
+ if (delegation != NULL) {
+ filemap_flush(inode->i_mapping);
+ err = __nfs_inode_return_delegation(inode, delegation, 0);
+ }
iput(inode);
- goto restart;
+ if (!err)
+ goto restart;
+ set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
+ return err;
}
rcu_read_unlock();
+ return 0;
}
/*
@@ -338,8 +349,10 @@ int nfs_inode_return_delegation(struct inode *inode)
spin_lock(&clp->cl_lock);
delegation = nfs_detach_delegation_locked(nfsi, NULL);
spin_unlock(&clp->cl_lock);
- if (delegation != NULL)
- err = __nfs_inode_return_delegation(inode, delegation);
+ if (delegation != NULL) {
+ nfs_msync_inode(inode);
+ err = __nfs_inode_return_delegation(inode, delegation, 1);
+ }
}
return err;
}
@@ -368,33 +381,47 @@ void nfs_super_return_all_delegations(struct super_block *sb)
spin_unlock(&delegation->lock);
}
rcu_read_unlock();
- nfs_client_return_marked_delegations(clp);
+ if (nfs_client_return_marked_delegations(clp) != 0)
+ nfs4_schedule_state_manager(clp);
}
-static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
+static
+void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp, fmode_t flags)
{
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);
- set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
+ if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE))
+ continue;
+ if (delegation->type & flags)
+ nfs_mark_return_delegation(clp, delegation);
}
rcu_read_unlock();
}
+static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
+{
+ nfs_client_mark_return_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
+}
+
static void nfs_delegation_run_state_manager(struct nfs_client *clp)
{
if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state))
nfs4_schedule_state_manager(clp);
}
-void nfs_expire_all_delegations(struct nfs_client *clp)
+void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags)
{
- nfs_client_mark_return_all_delegations(clp);
+ nfs_client_mark_return_all_delegation_types(clp, flags);
nfs_delegation_run_state_manager(clp);
}
+void nfs_expire_all_delegations(struct nfs_client *clp)
+{
+ nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
+}
+
/*
* Return all delegations following an NFS4ERR_CB_PATH_DOWN error.
*/
@@ -413,8 +440,7 @@ static void nfs_client_mark_return_unreferenced_delegations(struct nfs_client *c
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
if (test_and_clear_bit(NFS_DELEGATION_REFERENCED, &delegation->flags))
continue;
- set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
- set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
+ nfs_mark_return_delegation(clp, delegation);
}
rcu_read_unlock();
}
@@ -428,18 +454,21 @@ void nfs_expire_unreferenced_delegations(struct nfs_client *clp)
/*
* Asynchronous delegation recall!
*/
-int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid)
+int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid,
+ int (*validate_stateid)(struct nfs_delegation *delegation,
+ const nfs4_stateid *stateid))
{
struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
struct nfs_delegation *delegation;
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
- if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data,
- sizeof(delegation->stateid.data)) != 0) {
+
+ if (!validate_stateid(delegation, stateid)) {
rcu_read_unlock();
return -ENOENT;
}
+
nfs_mark_return_delegation(clp, delegation);
rcu_read_unlock();
nfs_delegation_run_state_manager(clp);