[PATCH v4 1/9] NFSD: Lock state before calling fault injection function

[bjschuma@netapp.com]

From: Bryan Schumaker <bjschuma@netapp.com>

Each function touches state in some way, so getting the lock earlier
can help simplify code.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
---
 fs/nfsd/fault_inject.c |  2 ++
 fs/nfsd/nfs4state.c    | 18 ++----------------
 2 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
index 0278112..4b385a1 100644
--- a/fs/nfsd/fault_inject.c
+++ b/fs/nfsd/fault_inject.c
@@ -51,7 +51,9 @@ static int nfsd_inject_set(void *op_ptr, u64 val)
 	else
 		printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val);
 
+	nfs4_lock_state();
 	op->func(val);
+	nfs4_unlock_state();
 	return 0;
 }
 
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index b1aa577..8e19c69 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4611,13 +4611,11 @@ void nfsd_forget_clients(u64 num)
 	int count = 0;
 	struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
 
-	nfs4_lock_state();
 	list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
 		expire_client(clp);
 		if (++count == num)
 			break;
 	}
-	nfs4_unlock_state();
 
 	printk(KERN_INFO "NFSD: Forgot %d clients", count);
 }
@@ -4653,25 +4651,15 @@ static int nfsd_release_n_owners(u64 num, bool is_open_owner,
 
 void nfsd_forget_locks(u64 num)
 {
-	int count;
 	struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
-
-	nfs4_lock_state();
-	count = nfsd_release_n_owners(num, false, release_lockowner_sop, nn);
-	nfs4_unlock_state();
-
+	int count = nfsd_release_n_owners(num, false, release_lockowner_sop, nn);
 	printk(KERN_INFO "NFSD: Forgot %d locks", count);
 }
 
 void nfsd_forget_openowners(u64 num)
 {
-	int count;
 	struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
-
-	nfs4_lock_state();
-	count = nfsd_release_n_owners(num, true, release_openowner_sop, nn);
-	nfs4_unlock_state();
-
+	int count = nfsd_release_n_owners(num, true, release_openowner_sop, nn);
 	printk(KERN_INFO "NFSD: Forgot %d open owners", count);
 }
 
@@ -4704,10 +4692,8 @@ void nfsd_forget_delegations(u64 num)
 	count = nfsd_process_n_delegations(num, &victims);
 	spin_unlock(&recall_lock);
 
-	nfs4_lock_state();
 	list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru)
 		unhash_delegation(dp);
-	nfs4_unlock_state();
 
 	printk(KERN_INFO "NFSD: Forgot %d delegations", count);
 }
-- 
1.8.0.1