nfsd: add a forget_client set_clnt routine

...that relies on the client_lock instead of client_mutex.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

3 files changed, 32 insertions, 1 deletions

diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
index a0387fd47e14..5f3ead0c72fb 100644
--- a/fs/nfsd/fault_inject.c
+++ b/fs/nfsd/fault_inject.c
@@ -136,7 +136,7 @@ static struct nfsd_fault_inject_op inject_ops[] = {
                 .file     = "forget_clients",
                 .get      = nfsd_inject_print_clients,
                 .set_val  = nfsd_inject_set,
-                .set_clnt = nfsd_inject_set_client,
+                .set_clnt = nfsd_inject_forget_client,
                 .forget   = nfsd_forget_client,
         },
         {
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2225e1103742..c4c28f8f48a1 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5760,6 +5760,34 @@ u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
         return 1;
 }
 
+u64
+nfsd_inject_forget_client(struct nfsd_fault_inject_op *op,
+                          struct sockaddr_storage *addr, size_t addr_size)
+{
+        u64 count = 0;
+        struct nfs4_client *clp;
+        struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
+                                          nfsd_net_id);
+
+        if (!nfsd_netns_ready(nn))
+                return count;
+
+        spin_lock(&nn->client_lock);
+        clp = nfsd_find_client(addr, addr_size);
+        if (clp) {
+                if (mark_client_expired_locked(clp) == nfs_ok)
+                        ++count;
+                else
+                        clp = NULL;
+        }
+        spin_unlock(&nn->client_lock);
+
+        if (clp)
+                expire_client(clp);
+
+        return count;
+}
+
 static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
                              const char *type)
 {
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 7c7580ea9680..77a1903d58ab 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -480,6 +480,9 @@ struct nfs4_client *nfsd_find_client(struct sockaddr_storage *, size_t);
 
 u64 nfsd_inject_print_clients(struct nfsd_fault_inject_op *op);
 u64 nfsd_forget_client(struct nfs4_client *, u64);
+u64 nfsd_inject_forget_client(struct nfsd_fault_inject_op *,
+                              struct sockaddr_storage *, size_t);
+
 u64 nfsd_forget_client_locks(struct nfs4_client*, u64);
 u64 nfsd_forget_client_openowners(struct nfs4_client *, u64);
 u64 nfsd_forget_client_delegations(struct nfs4_client *, u64);