NFS: Store the credential of the mount process in the nfs_server

Store the credential of the mount process so that we can determine
information such as the user namespace.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

4 files changed, 15 insertions, 1 deletions

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index a843cf3f6340..e3baa9f1da76 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -500,7 +500,7 @@ int nfs_create_rpc_client(struct nfs_client *clp,
                 .program        = &nfs_program,
                 .version        = clp->rpc_ops->version,
                 .authflavor     = flavor,
-                .cred           = current_cred(),
+                .cred           = cl_init->cred,
         };
 
         if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
@@ -655,6 +655,7 @@ static int nfs_init_server(struct nfs_server *server,
                 .proto = data->nfs_server.protocol,
                 .net = data->net,
                 .timeparms = &timeparms,
+                .cred = server->cred,
         };
         struct nfs_client *clp;
         int error;
@@ -923,6 +924,7 @@ void nfs_free_server(struct nfs_server *server)
         ida_destroy(&server->lockowner_id);
         ida_destroy(&server->openowner_id);
         nfs_free_iostats(server->io_stats);
+        put_cred(server->cred);
         kfree(server);
         nfs_release_automount_timer();
 }
@@ -943,6 +945,8 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
         if (!server)
                 return ERR_PTR(-ENOMEM);
 
+        server->cred = get_cred(current_cred());
+
         error = -ENOMEM;
         fattr = nfs_alloc_fattr();
         if (fattr == NULL)
@@ -1009,6 +1013,8 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source,
         if (!server)
                 return ERR_PTR(-ENOMEM);
 
+        server->cred = get_cred(source->cred);
+
         error = -ENOMEM;
         fattr_fsinfo = nfs_alloc_fattr();
         if (fattr_fsinfo == NULL)
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 196534634c3a..22232e76df47 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -84,6 +84,7 @@ struct nfs_client_initdata {
         u32 minorversion;
         struct net *net;
         const struct rpc_timeout *timeparms;
+        const struct cred *cred;
 };
 
 /*
diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
index 7879f2a0fcfd..1afdb0f7473f 100644
--- a/fs/nfs/nfs3client.c
+++ b/fs/nfs/nfs3client.c
@@ -91,6 +91,7 @@ struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
                 .proto = ds_proto,
                 .net = mds_clp->cl_net,
                 .timeparms = &ds_timeout,
+                .cred = mds_srv->cred,
         };
         struct nfs_client *clp;
         char buf[INET6_ADDRSTRLEN + 1];
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 1339ede979af..3ce246346f02 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -870,6 +870,7 @@ static int nfs4_set_client(struct nfs_server *server,
                 .minorversion = minorversion,
                 .net = net,
                 .timeparms = timeparms,
+                .cred = server->cred,
         };
         struct nfs_client *clp;
 
@@ -931,6 +932,7 @@ struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
                 .minorversion = minor_version,
                 .net = mds_clp->cl_net,
                 .timeparms = &ds_timeout,
+                .cred = mds_srv->cred,
         };
         char buf[INET6_ADDRSTRLEN + 1];
 
@@ -1107,6 +1109,8 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info,
         if (!server)
                 return ERR_PTR(-ENOMEM);
 
+        server->cred = get_cred(current_cred());
+
         auth_probe = mount_info->parsed->auth_info.flavor_len < 1;
 
         /* set up the general RPC client */
@@ -1143,6 +1147,8 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
         parent_server = NFS_SB(data->sb);
         parent_client = parent_server->nfs_client;
 
+        server->cred = get_cred(parent_server->cred);
+
         /* Initialise the client representation from the parent server */
         nfs_server_copy_userdata(server, parent_server);