diff options
| -rw-r--r-- | fs/nfs/sysfs.c | 54 | ||||
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 1 | ||||
| -rw-r--r-- | include/linux/sunrpc/clnt.h | 3 | ||||
| -rw-r--r-- | net/sunrpc/clnt.c | 5 |
4 files changed, 61 insertions, 2 deletions
diff --git a/fs/nfs/sysfs.c b/fs/nfs/sysfs.c index 7009de149158..1fedbaff10e9 100644 --- a/fs/nfs/sysfs.c +++ b/fs/nfs/sysfs.c @@ -12,6 +12,7 @@ #include <linux/string.h> #include <linux/nfs_fs.h> #include <linux/rcupdate.h> +#include <linux/lockd/lockd.h> #include "nfs4_fs.h" #include "netns.h" @@ -216,6 +217,50 @@ void nfs_netns_sysfs_destroy(struct nfs_net *netns) } } +static ssize_t +shutdown_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct nfs_server *server = container_of(kobj, struct nfs_server, kobj); + bool shutdown = server->flags & NFS_MOUNT_SHUTDOWN; + return sysfs_emit(buf, "%d\n", shutdown); +} + +static ssize_t +shutdown_store(struct kobject *kobj, struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct nfs_server *server; + int ret, val; + + server = container_of(kobj, struct nfs_server, kobj); + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val != 1) + return -EINVAL; + + /* already shut down? */ + if (server->flags & NFS_MOUNT_SHUTDOWN) + goto out; + + server->flags |= NFS_MOUNT_SHUTDOWN; + server->client->cl_shutdown = 1; + server->nfs_client->cl_rpcclient->cl_shutdown = 1; + + if (!IS_ERR(server->client_acl)) + server->client_acl->cl_shutdown = 1; + + if (server->nlm_host) + server->nlm_host->h_rpcclnt->cl_shutdown = 1; +out: + return count; +} + +static struct kobj_attribute nfs_sysfs_attr_shutdown = __ATTR_RW(shutdown); + #define RPC_CLIENT_NAME_SIZE 64 void nfs_sysfs_link_rpc_client(struct nfs_server *server, @@ -259,9 +304,16 @@ void nfs_sysfs_add_server(struct nfs_server *server) ret = kobject_init_and_add(&server->kobj, &nfs_sb_ktype, &nfs_kset->kobj, "server-%d", server->s_sysfs_id); - if (ret < 0) + if (ret < 0) { pr_warn("NFS: nfs sysfs add server-%d failed (%d)\n", server->s_sysfs_id, ret); + return; + } + ret = sysfs_create_file_ns(&server->kobj, &nfs_sysfs_attr_shutdown.attr, + nfs_netns_server_namespace(&server->kobj)); + if (ret < 0) + pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n", + server->s_sysfs_id, ret); } EXPORT_SYMBOL_GPL(nfs_sysfs_add_server); diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index 4bed0b6c79c7..20eeba8b009d 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -154,6 +154,7 @@ struct nfs_server { #define NFS_MOUNT_WRITE_EAGER 0x01000000 #define NFS_MOUNT_WRITE_WAIT 0x02000000 #define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000 +#define NFS_MOUNT_SHUTDOWN 0x08000000 unsigned int fattr_valid; /* Valid attributes */ unsigned int caps; /* server capabilities */ diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index 88cdf6e3012a..4f41d839face 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -63,7 +63,8 @@ struct rpc_clnt { cl_discrtry : 1,/* disconnect before retry */ cl_noretranstimeo: 1,/* No retransmit timeouts */ cl_autobind : 1,/* use getport() */ - cl_chatty : 1;/* be verbose */ + cl_chatty : 1,/* be verbose */ + cl_shutdown : 1;/* rpc immediate -EIO */ struct xprtsec_parms cl_xprtsec; /* transport security policy */ struct rpc_rtt * cl_rtt; /* RTO estimator data */ diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 640c76ab2f1a..d7c697af3762 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1724,6 +1724,11 @@ call_start(struct rpc_task *task) trace_rpc_request(task); + if (task->tk_client->cl_shutdown) { + rpc_call_rpcerror(task, -EIO); + return; + } + /* Increment call count (version might not be valid for ping) */ if (clnt->cl_program->version[clnt->cl_vers]) clnt->cl_program->version[clnt->cl_vers]->counts[idx]++; |