[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/nfs/client.c b/ap/os/linux/linux-3.4.x/fs/nfs/client.c
new file mode 100644
index 0000000..37f6de3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/nfs/client.c
@@ -0,0 +1,2077 @@
+/* client.c: NFS client sharing and management code
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/sunrpc/metrics.h>
+#include <linux/sunrpc/xprtsock.h>
+#include <linux/sunrpc/xprtrdma.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/nfs4_mount.h>
+#include <linux/lockd/bind.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/nfs_idmap.h>
+#include <linux/vfs.h>
+#include <linux/inet.h>
+#include <linux/in6.h>
+#include <linux/slab.h>
+#include <linux/idr.h>
+#include <net/ipv6.h>
+#include <linux/nfs_xdr.h>
+#include <linux/sunrpc/bc_xprt.h>
+#include <linux/nsproxy.h>
+#include <linux/pid_namespace.h>
+
+
+#include "nfs4_fs.h"
+#include "callback.h"
+#include "delegation.h"
+#include "iostat.h"
+#include "internal.h"
+#include "fscache.h"
+#include "pnfs.h"
+#include "netns.h"
+
+#define NFSDBG_FACILITY NFSDBG_CLIENT
+
+static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
+#ifdef CONFIG_NFS_V4
+
+/*
+ * Get a unique NFSv4.0 callback identifier which will be used
+ * by the V4.0 callback service to lookup the nfs_client struct
+ */
+static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
+{
+ int ret = 0;
+ struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
+
+ if (clp->rpc_ops->version != 4 || minorversion != 0)
+ return ret;
+retry:
+ if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL))
+ return -ENOMEM;
+ spin_lock(&nn->nfs_client_lock);
+ ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident);
+ spin_unlock(&nn->nfs_client_lock);
+ if (ret == -EAGAIN)
+ goto retry;
+ return ret;
+}
+#endif /* CONFIG_NFS_V4 */
+
+/*
+ * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
+ */
+static bool nfs4_disable_idmapping = true;
+
+/*
+ * RPC cruft for NFS
+ */
+static const struct rpc_version *nfs_version[5] = {
+ [2] = &nfs_version2,
+#ifdef CONFIG_NFS_V3
+ [3] = &nfs_version3,
+#endif
+#ifdef CONFIG_NFS_V4
+ [4] = &nfs_version4,
+#endif
+};
+
+const struct rpc_program nfs_program = {
+ .name = "nfs",
+ .number = NFS_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfs_version),
+ .version = nfs_version,
+ .stats = &nfs_rpcstat,
+ .pipe_dir_name = NFS_PIPE_DIRNAME,
+};
+
+struct rpc_stat nfs_rpcstat = {
+ .program = &nfs_program
+};
+
+
+#ifdef CONFIG_NFS_V3_ACL
+static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
+static const struct rpc_version *nfsacl_version[] = {
+ [3] = &nfsacl_version3,
+};
+
+const struct rpc_program nfsacl_program = {
+ .name = "nfsacl",
+ .number = NFS_ACL_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfsacl_version),
+ .version = nfsacl_version,
+ .stats = &nfsacl_rpcstat,
+};
+#endif /* CONFIG_NFS_V3_ACL */
+
+struct nfs_client_initdata {
+ const char *hostname;
+ const struct sockaddr *addr;
+ size_t addrlen;
+ const struct nfs_rpc_ops *rpc_ops;
+ int proto;
+ u32 minorversion;
+ struct net *net;
+};
+
+/*
+ * Allocate a shared client record
+ *
+ * Since these are allocated/deallocated very rarely, we don't
+ * bother putting them in a slab cache...
+ */
+static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
+{
+ struct nfs_client *clp;
+ struct rpc_cred *cred;
+ int err = -ENOMEM;
+
+ if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
+ goto error_0;
+
+ clp->rpc_ops = cl_init->rpc_ops;
+
+ atomic_set(&clp->cl_count, 1);
+ clp->cl_cons_state = NFS_CS_INITING;
+
+ memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
+ clp->cl_addrlen = cl_init->addrlen;
+
+ if (cl_init->hostname) {
+ err = -ENOMEM;
+ clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
+ if (!clp->cl_hostname)
+ goto error_cleanup;
+ }
+
+ INIT_LIST_HEAD(&clp->cl_superblocks);
+ clp->cl_rpcclient = ERR_PTR(-EINVAL);
+
+ clp->cl_proto = cl_init->proto;
+ clp->net = get_net(cl_init->net);
+
+#ifdef CONFIG_NFS_V4
+ err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
+ if (err)
+ goto error_cleanup;
+
+ spin_lock_init(&clp->cl_lock);
+ INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
+ rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
+ clp->cl_boot_time = CURRENT_TIME;
+ clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
+ clp->cl_minorversion = cl_init->minorversion;
+ clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
+#endif
+ cred = rpc_lookup_machine_cred("*");
+ if (!IS_ERR(cred))
+ clp->cl_machine_cred = cred;
+ nfs_fscache_get_client_cookie(clp);
+
+ return clp;
+
+error_cleanup:
+ kfree(clp);
+error_0:
+ return ERR_PTR(err);
+}
+
+#ifdef CONFIG_NFS_V4
+#ifdef CONFIG_NFS_V4_1
+static void nfs4_shutdown_session(struct nfs_client *clp)
+{
+ if (nfs4_has_session(clp)) {
+ nfs4_deviceid_purge_client(clp);
+ nfs4_destroy_session(clp->cl_session);
+ }
+
+}
+#else /* CONFIG_NFS_V4_1 */
+static void nfs4_shutdown_session(struct nfs_client *clp)
+{
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * Destroy the NFS4 callback service
+ */
+static void nfs4_destroy_callback(struct nfs_client *clp)
+{
+ if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
+ nfs_callback_down(clp->cl_mvops->minor_version);
+}
+
+static void nfs4_shutdown_client(struct nfs_client *clp)
+{
+ if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
+ nfs4_kill_renewd(clp);
+ nfs4_shutdown_session(clp);
+ nfs4_destroy_callback(clp);
+ if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
+ nfs_idmap_delete(clp);
+
+ rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
+}
+
+/* idr_remove_all is not needed as all id's are removed by nfs_put_client */
+void nfs_cleanup_cb_ident_idr(struct net *net)
+{
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+
+ idr_destroy(&nn->cb_ident_idr);
+}
+
+/* nfs_client_lock held */
+static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
+{
+ struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
+
+ if (clp->cl_cb_ident)
+ idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
+}
+
+static void pnfs_init_server(struct nfs_server *server)
+{
+ rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
+}
+
+static void nfs4_destroy_server(struct nfs_server *server)
+{
+ nfs4_purge_state_owners(server);
+}
+
+#else
+static void nfs4_shutdown_client(struct nfs_client *clp)
+{
+}
+
+void nfs_cleanup_cb_ident_idr(struct net *net)
+{
+}
+
+static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
+{
+}
+
+static void pnfs_init_server(struct nfs_server *server)
+{
+}
+
+#endif /* CONFIG_NFS_V4 */
+
+/*
+ * Destroy a shared client record
+ */
+static void nfs_free_client(struct nfs_client *clp)
+{
+ dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
+
+ nfs4_shutdown_client(clp);
+
+ nfs_fscache_release_client_cookie(clp);
+
+ /* -EIO all pending I/O */
+ if (!IS_ERR(clp->cl_rpcclient))
+ rpc_shutdown_client(clp->cl_rpcclient);
+
+ if (clp->cl_machine_cred != NULL)
+ put_rpccred(clp->cl_machine_cred);
+
+ put_net(clp->net);
+ kfree(clp->cl_hostname);
+ kfree(clp->server_scope);
+ kfree(clp->impl_id);
+ kfree(clp);
+
+ dprintk("<-- nfs_free_client()\n");
+}
+
+/*
+ * Release a reference to a shared client record
+ */
+void nfs_put_client(struct nfs_client *clp)
+{
+ struct nfs_net *nn;
+
+ if (!clp)
+ return;
+
+ dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
+ nn = net_generic(clp->net, nfs_net_id);
+
+ if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
+ list_del(&clp->cl_share_link);
+ nfs_cb_idr_remove_locked(clp);
+ spin_unlock(&nn->nfs_client_lock);
+
+ BUG_ON(!list_empty(&clp->cl_superblocks));
+
+ nfs_free_client(clp);
+ }
+}
+EXPORT_SYMBOL_GPL(nfs_put_client);
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+/*
+ * Test if two ip6 socket addresses refer to the same socket by
+ * comparing relevant fields. The padding bytes specifically, are not
+ * compared. sin6_flowinfo is not compared because it only affects QoS
+ * and sin6_scope_id is only compared if the address is "link local"
+ * because "link local" addresses need only be unique to a specific
+ * link. Conversely, ordinary unicast addresses might have different
+ * sin6_scope_id.
+ *
+ * The caller should ensure both socket addresses are AF_INET6.
+ */
+static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
+ const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
+
+ if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
+ return 0;
+ else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+ return sin1->sin6_scope_id == sin2->sin6_scope_id;
+
+ return 1;
+}
+#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
+static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ return 0;
+}
+#endif
+
+/*
+ * Test if two ip4 socket addresses refer to the same socket, by
+ * comparing relevant fields. The padding bytes specifically, are
+ * not compared.
+ *
+ * The caller should ensure both socket addresses are AF_INET.
+ */
+static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
+ const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
+
+ return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
+}
+
+static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
+ const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
+
+ return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
+ (sin1->sin6_port == sin2->sin6_port);
+}
+
+static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
+ const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
+
+ return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
+ (sin1->sin_port == sin2->sin_port);
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * Test if two socket addresses represent the same actual socket,
+ * by comparing (only) relevant fields, excluding the port number.
+ */
+static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ if (sa1->sa_family != sa2->sa_family)
+ return 0;
+
+ switch (sa1->sa_family) {
+ case AF_INET:
+ return nfs_sockaddr_match_ipaddr4(sa1, sa2);
+ case AF_INET6:
+ return nfs_sockaddr_match_ipaddr6(sa1, sa2);
+ }
+ return 0;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * Test if two socket addresses represent the same actual socket,
+ * by comparing (only) relevant fields, including the port number.
+ */
+static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
+ const struct sockaddr *sa2)
+{
+ if (sa1->sa_family != sa2->sa_family)
+ return 0;
+
+ switch (sa1->sa_family) {
+ case AF_INET:
+ return nfs_sockaddr_cmp_ip4(sa1, sa2);
+ case AF_INET6:
+ return nfs_sockaddr_cmp_ip6(sa1, sa2);
+ }
+ return 0;
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/* Common match routine for v4.0 and v4.1 callback services */
+static bool nfs4_cb_match_client(const struct sockaddr *addr,
+ struct nfs_client *clp, u32 minorversion)
+{
+ struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
+
+ /* Don't match clients that failed to initialise */
+ if (!(clp->cl_cons_state == NFS_CS_READY ||
+ clp->cl_cons_state == NFS_CS_SESSION_INITING))
+ return false;
+
+ /* Match the version and minorversion */
+ if (clp->rpc_ops->version != 4 ||
+ clp->cl_minorversion != minorversion)
+ return false;
+
+ /* Match only the IP address, not the port number */
+ if (!nfs_sockaddr_match_ipaddr(addr, clap))
+ return false;
+
+ return true;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * Find an nfs_client on the list that matches the initialisation data
+ * that is supplied.
+ */
+static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
+{
+ struct nfs_client *clp;
+ const struct sockaddr *sap = data->addr;
+ struct nfs_net *nn = net_generic(data->net, nfs_net_id);
+
+ list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
+ const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
+ /* Don't match clients that failed to initialise properly */
+ if (clp->cl_cons_state < 0)
+ continue;
+
+ /* Different NFS versions cannot share the same nfs_client */
+ if (clp->rpc_ops != data->rpc_ops)
+ continue;
+
+ if (clp->cl_proto != data->proto)
+ continue;
+ /* Match nfsv4 minorversion */
+ if (clp->cl_minorversion != data->minorversion)
+ continue;
+ /* Match the full socket address */
+ if (!nfs_sockaddr_cmp(sap, clap))
+ continue;
+
+ atomic_inc(&clp->cl_count);
+ return clp;
+ }
+ return NULL;
+}
+
+/*
+ * Look up a client by IP address and protocol version
+ * - creates a new record if one doesn't yet exist
+ */
+static struct nfs_client *
+nfs_get_client(const struct nfs_client_initdata *cl_init,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport)
+{
+ struct nfs_client *clp, *new = NULL;
+ int error;
+ struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
+
+ dprintk("--> nfs_get_client(%s,v%u)\n",
+ cl_init->hostname ?: "", cl_init->rpc_ops->version);
+
+ /* see if the client already exists */
+ do {
+ spin_lock(&nn->nfs_client_lock);
+
+ clp = nfs_match_client(cl_init);
+ if (clp)
+ goto found_client;
+ if (new)
+ goto install_client;
+
+ spin_unlock(&nn->nfs_client_lock);
+
+ new = nfs_alloc_client(cl_init);
+ } while (!IS_ERR(new));
+
+ dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
+ return new;
+
+ /* install a new client and return with it unready */
+install_client:
+ clp = new;
+ list_add(&clp->cl_share_link, &nn->nfs_client_list);
+ spin_unlock(&nn->nfs_client_lock);
+
+ error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
+ authflavour, noresvport);
+ if (error < 0) {
+ nfs_put_client(clp);
+ return ERR_PTR(error);
+ }
+ dprintk("--> nfs_get_client() = %p [new]\n", clp);
+ return clp;
+
+ /* found an existing client
+ * - make sure it's ready before returning
+ */
+found_client:
+ spin_unlock(&nn->nfs_client_lock);
+
+ if (new)
+ nfs_free_client(new);
+
+ error = wait_event_killable(nfs_client_active_wq,
+ clp->cl_cons_state < NFS_CS_INITING);
+ if (error < 0) {
+ nfs_put_client(clp);
+ return ERR_PTR(-ERESTARTSYS);
+ }
+
+ if (clp->cl_cons_state < NFS_CS_READY) {
+ error = clp->cl_cons_state;
+ nfs_put_client(clp);
+ return ERR_PTR(error);
+ }
+
+ BUG_ON(clp->cl_cons_state != NFS_CS_READY);
+
+ dprintk("--> nfs_get_client() = %p [share]\n", clp);
+ return clp;
+}
+
+/*
+ * Mark a server as ready or failed
+ */
+void nfs_mark_client_ready(struct nfs_client *clp, int state)
+{
+ clp->cl_cons_state = state;
+ wake_up_all(&nfs_client_active_wq);
+}
+
+/*
+ * With sessions, the client is not marked ready until after a
+ * successful EXCHANGE_ID and CREATE_SESSION.
+ *
+ * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
+ * other versions of NFS can be tried.
+ */
+int nfs4_check_client_ready(struct nfs_client *clp)
+{
+ if (!nfs4_has_session(clp))
+ return 0;
+ if (clp->cl_cons_state < NFS_CS_READY)
+ return -EPROTONOSUPPORT;
+ return 0;
+}
+
+/*
+ * Initialise the timeout values for a connection
+ */
+static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
+ unsigned int timeo, unsigned int retrans)
+{
+ to->to_initval = timeo * HZ / 10;
+ to->to_retries = retrans;
+
+ switch (proto) {
+ case XPRT_TRANSPORT_TCP:
+ case XPRT_TRANSPORT_RDMA:
+ if (to->to_retries == 0)
+ to->to_retries = NFS_DEF_TCP_RETRANS;
+ if (to->to_initval == 0)
+ to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
+ if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
+ to->to_initval = NFS_MAX_TCP_TIMEOUT;
+ to->to_increment = to->to_initval;
+ to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
+ if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
+ to->to_maxval = NFS_MAX_TCP_TIMEOUT;
+ if (to->to_maxval < to->to_initval)
+ to->to_maxval = to->to_initval;
+ to->to_exponential = 0;
+ break;
+ case XPRT_TRANSPORT_UDP:
+ if (to->to_retries == 0)
+ to->to_retries = NFS_DEF_UDP_RETRANS;
+ if (!to->to_initval)
+ to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
+ if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
+ to->to_initval = NFS_MAX_UDP_TIMEOUT;
+ to->to_maxval = NFS_MAX_UDP_TIMEOUT;
+ to->to_exponential = 1;
+ break;
+ default:
+ BUG();
+ }
+}
+
+/*
+ * Create an RPC client handle
+ */
+static int nfs_create_rpc_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
+ rpc_authflavor_t flavor,
+ int discrtry, int noresvport)
+{
+ struct rpc_clnt *clnt = NULL;
+ struct rpc_create_args args = {
+ .net = clp->net,
+ .protocol = clp->cl_proto,
+ .address = (struct sockaddr *)&clp->cl_addr,
+ .addrsize = clp->cl_addrlen,
+ .timeout = timeparms,
+ .servername = clp->cl_hostname,
+ .program = &nfs_program,
+ .version = clp->rpc_ops->version,
+ .authflavor = flavor,
+ };
+
+ if (discrtry)
+ args.flags |= RPC_CLNT_CREATE_DISCRTRY;
+ if (noresvport)
+ args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
+
+ if (!IS_ERR(clp->cl_rpcclient))
+ return 0;
+
+ clnt = rpc_create(&args);
+ if (IS_ERR(clnt)) {
+ dprintk("%s: cannot create RPC client. Error = %ld\n",
+ __func__, PTR_ERR(clnt));
+ return PTR_ERR(clnt);
+ }
+
+ clp->cl_rpcclient = clnt;
+ return 0;
+}
+
+/*
+ * Version 2 or 3 client destruction
+ */
+static void nfs_destroy_server(struct nfs_server *server)
+{
+ if (server->nlm_host)
+ nlmclnt_done(server->nlm_host);
+}
+
+/*
+ * Version 2 or 3 lockd setup
+ */
+static int nfs_start_lockd(struct nfs_server *server)
+{
+ struct nlm_host *host;
+ struct nfs_client *clp = server->nfs_client;
+ struct nlmclnt_initdata nlm_init = {
+ .hostname = clp->cl_hostname,
+ .address = (struct sockaddr *)&clp->cl_addr,
+ .addrlen = clp->cl_addrlen,
+ .nfs_version = clp->rpc_ops->version,
+ .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
+ 1 : 0,
+ .net = clp->net,
+ };
+
+ if (nlm_init.nfs_version > 3)
+ return 0;
+ if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
+ (server->flags & NFS_MOUNT_LOCAL_FCNTL))
+ return 0;
+
+ switch (clp->cl_proto) {
+ default:
+ nlm_init.protocol = IPPROTO_TCP;
+ break;
+ case XPRT_TRANSPORT_UDP:
+ nlm_init.protocol = IPPROTO_UDP;
+ }
+
+ host = nlmclnt_init(&nlm_init);
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ server->nlm_host = host;
+ server->destroy = nfs_destroy_server;
+ return 0;
+}
+
+/*
+ * Initialise an NFSv3 ACL client connection
+ */
+#ifdef CONFIG_NFS_V3_ACL
+static void nfs_init_server_aclclient(struct nfs_server *server)
+{
+ if (server->nfs_client->rpc_ops->version != 3)
+ goto out_noacl;
+ if (server->flags & NFS_MOUNT_NOACL)
+ goto out_noacl;
+
+ server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
+ if (IS_ERR(server->client_acl))
+ goto out_noacl;
+
+ /* No errors! Assume that Sun nfsacls are supported */
+ server->caps |= NFS_CAP_ACLS;
+ return;
+
+out_noacl:
+ server->caps &= ~NFS_CAP_ACLS;
+}
+#else
+static inline void nfs_init_server_aclclient(struct nfs_server *server)
+{
+ server->flags &= ~NFS_MOUNT_NOACL;
+ server->caps &= ~NFS_CAP_ACLS;
+}
+#endif
+
+/*
+ * Create a general RPC client
+ */
+static int nfs_init_server_rpcclient(struct nfs_server *server,
+ const struct rpc_timeout *timeo,
+ rpc_authflavor_t pseudoflavour)
+{
+ struct nfs_client *clp = server->nfs_client;
+
+ server->client = rpc_clone_client(clp->cl_rpcclient);
+ if (IS_ERR(server->client)) {
+ dprintk("%s: couldn't create rpc_client!\n", __func__);
+ return PTR_ERR(server->client);
+ }
+
+ memcpy(&server->client->cl_timeout_default,
+ timeo,
+ sizeof(server->client->cl_timeout_default));
+ server->client->cl_timeout = &server->client->cl_timeout_default;
+
+ if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
+ struct rpc_auth *auth;
+
+ auth = rpcauth_create(pseudoflavour, server->client);
+ if (IS_ERR(auth)) {
+ dprintk("%s: couldn't create credcache!\n", __func__);
+ return PTR_ERR(auth);
+ }
+ }
+ server->client->cl_softrtry = 0;
+ if (server->flags & NFS_MOUNT_SOFT)
+ server->client->cl_softrtry = 1;
+
+ return 0;
+}
+
+/*
+ * Initialise an NFS2 or NFS3 client
+ */
+int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
+ const char *ip_addr, rpc_authflavor_t authflavour,
+ int noresvport)
+{
+ int error;
+
+ if (clp->cl_cons_state == NFS_CS_READY) {
+ /* the client is already initialised */
+ dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
+ return 0;
+ }
+
+ /*
+ * Create a client RPC handle for doing FSSTAT with UNIX auth only
+ * - RFC 2623, sec 2.3.2
+ */
+ error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
+ 0, noresvport);
+ if (error < 0)
+ goto error;
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ return 0;
+
+error:
+ nfs_mark_client_ready(clp, error);
+ dprintk("<-- nfs_init_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Create a version 2 or 3 client
+ */
+static int nfs_init_server(struct nfs_server *server,
+ const struct nfs_parsed_mount_data *data)
+{
+ struct nfs_client_initdata cl_init = {
+ .hostname = data->nfs_server.hostname,
+ .addr = (const struct sockaddr *)&data->nfs_server.address,
+ .addrlen = data->nfs_server.addrlen,
+ .rpc_ops = &nfs_v2_clientops,
+ .proto = data->nfs_server.protocol,
+ .net = data->net,
+ };
+ struct rpc_timeout timeparms;
+ struct nfs_client *clp;
+ int error;
+
+ dprintk("--> nfs_init_server()\n");
+
+#ifdef CONFIG_NFS_V3
+ if (data->version == 3)
+ cl_init.rpc_ops = &nfs_v3_clientops;
+#endif
+
+ nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
+ data->timeo, data->retrans);
+
+ /* Allocate or find a client reference we can use */
+ clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
+ data->flags & NFS_MOUNT_NORESVPORT);
+ if (IS_ERR(clp)) {
+ dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
+ return PTR_ERR(clp);
+ }
+
+ server->nfs_client = clp;
+
+ /* Initialise the client representation from the mount data */
+ server->flags = data->flags;
+ server->options = data->options;
+ server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
+ NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
+ NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
+
+ if (data->rsize)
+ server->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ server->wsize = nfs_block_size(data->wsize, NULL);
+
+ server->acregmin = data->acregmin * HZ;
+ server->acregmax = data->acregmax * HZ;
+ server->acdirmin = data->acdirmin * HZ;
+ server->acdirmax = data->acdirmax * HZ;
+
+ /* Start lockd here, before we might error out */
+ error = nfs_start_lockd(server);
+ if (error < 0)
+ goto error;
+
+ server->port = data->nfs_server.port;
+
+ error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
+ if (error < 0)
+ goto error;
+
+ /* Preserve the values of mount_server-related mount options */
+ if (data->mount_server.addrlen) {
+ memcpy(&server->mountd_address, &data->mount_server.address,
+ data->mount_server.addrlen);
+ server->mountd_addrlen = data->mount_server.addrlen;
+ }
+ server->mountd_version = data->mount_server.version;
+ server->mountd_port = data->mount_server.port;
+ server->mountd_protocol = data->mount_server.protocol;
+
+ server->namelen = data->namlen;
+ /* Create a client RPC handle for the NFSv3 ACL management interface */
+ nfs_init_server_aclclient(server);
+ dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
+ return 0;
+
+error:
+ server->nfs_client = NULL;
+ nfs_put_client(clp);
+ dprintk("<-- nfs_init_server() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Load up the server record from information gained in an fsinfo record
+ */
+static void nfs_server_set_fsinfo(struct nfs_server *server,
+ struct nfs_fh *mntfh,
+ struct nfs_fsinfo *fsinfo)
+{
+ unsigned long max_rpc_payload;
+
+ /* Work out a lot of parameters */
+ if (server->rsize == 0)
+ server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
+ if (server->wsize == 0)
+ server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
+
+ if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
+ server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
+ if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
+ server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
+
+ max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
+ if (server->rsize > max_rpc_payload)
+ server->rsize = max_rpc_payload;
+ if (server->rsize > NFS_MAX_FILE_IO_SIZE)
+ server->rsize = NFS_MAX_FILE_IO_SIZE;
+ server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+ server->backing_dev_info.name = "nfs";
+ server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
+
+ if (server->wsize > max_rpc_payload)
+ server->wsize = max_rpc_payload;
+ if (server->wsize > NFS_MAX_FILE_IO_SIZE)
+ server->wsize = NFS_MAX_FILE_IO_SIZE;
+ server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ server->pnfs_blksize = fsinfo->blksize;
+ set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
+
+ server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
+
+ server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
+ if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
+ server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
+ if (server->dtsize > server->rsize)
+ server->dtsize = server->rsize;
+
+ if (server->flags & NFS_MOUNT_NOAC) {
+ server->acregmin = server->acregmax = 0;
+ server->acdirmin = server->acdirmax = 0;
+ }
+
+ server->maxfilesize = fsinfo->maxfilesize;
+
+ server->time_delta = fsinfo->time_delta;
+
+ /* We're airborne Set socket buffersize */
+ rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
+}
+
+/*
+ * Probe filesystem information, including the FSID on v2/v3
+ */
+static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
+{
+ struct nfs_fsinfo fsinfo;
+ struct nfs_client *clp = server->nfs_client;
+ int error;
+
+ dprintk("--> nfs_probe_fsinfo()\n");
+
+ if (clp->rpc_ops->set_capabilities != NULL) {
+ error = clp->rpc_ops->set_capabilities(server, mntfh);
+ if (error < 0)
+ goto out_error;
+ }
+
+ fsinfo.fattr = fattr;
+ fsinfo.layouttype = 0;
+ error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
+ if (error < 0)
+ goto out_error;
+
+ nfs_server_set_fsinfo(server, mntfh, &fsinfo);
+
+ /* Get some general file system info */
+ if (server->namelen == 0) {
+ struct nfs_pathconf pathinfo;
+
+ pathinfo.fattr = fattr;
+ nfs_fattr_init(fattr);
+
+ if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
+ server->namelen = pathinfo.max_namelen;
+ }
+
+ dprintk("<-- nfs_probe_fsinfo() = 0\n");
+ return 0;
+
+out_error:
+ dprintk("nfs_probe_fsinfo: error = %d\n", -error);
+ return error;
+}
+
+/*
+ * Copy useful information when duplicating a server record
+ */
+static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
+{
+ target->flags = source->flags;
+ target->rsize = source->rsize;
+ target->wsize = source->wsize;
+ target->acregmin = source->acregmin;
+ target->acregmax = source->acregmax;
+ target->acdirmin = source->acdirmin;
+ target->acdirmax = source->acdirmax;
+ target->caps = source->caps;
+ target->options = source->options;
+}
+
+static void nfs_server_insert_lists(struct nfs_server *server)
+{
+ struct nfs_client *clp = server->nfs_client;
+ struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
+
+ spin_lock(&nn->nfs_client_lock);
+ list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
+ list_add_tail(&server->master_link, &nn->nfs_volume_list);
+ clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
+ spin_unlock(&nn->nfs_client_lock);
+
+}
+
+static void nfs_server_remove_lists(struct nfs_server *server)
+{
+ struct nfs_client *clp = server->nfs_client;
+ struct nfs_net *nn;
+
+ if (clp == NULL)
+ return;
+ nn = net_generic(clp->net, nfs_net_id);
+ spin_lock(&nn->nfs_client_lock);
+ list_del_rcu(&server->client_link);
+ if (list_empty(&clp->cl_superblocks))
+ set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
+ list_del(&server->master_link);
+ spin_unlock(&nn->nfs_client_lock);
+
+ synchronize_rcu();
+}
+
+/*
+ * Allocate and initialise a server record
+ */
+static struct nfs_server *nfs_alloc_server(void)
+{
+ struct nfs_server *server;
+
+ server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!server)
+ return NULL;
+
+ server->client = server->client_acl = ERR_PTR(-EINVAL);
+
+ /* Zero out the NFS state stuff */
+ INIT_LIST_HEAD(&server->client_link);
+ INIT_LIST_HEAD(&server->master_link);
+ INIT_LIST_HEAD(&server->delegations);
+ INIT_LIST_HEAD(&server->layouts);
+ INIT_LIST_HEAD(&server->state_owners_lru);
+
+ atomic_set(&server->active, 0);
+
+ server->io_stats = nfs_alloc_iostats();
+ if (!server->io_stats) {
+ kfree(server);
+ return NULL;
+ }
+
+ if (bdi_init(&server->backing_dev_info)) {
+ nfs_free_iostats(server->io_stats);
+ kfree(server);
+ return NULL;
+ }
+
+ ida_init(&server->openowner_id);
+ ida_init(&server->lockowner_id);
+ pnfs_init_server(server);
+
+ return server;
+}
+
+/*
+ * Free up a server record
+ */
+void nfs_free_server(struct nfs_server *server)
+{
+ dprintk("--> nfs_free_server()\n");
+
+ nfs_server_remove_lists(server);
+ unset_pnfs_layoutdriver(server);
+
+ if (server->destroy != NULL)
+ server->destroy(server);
+
+ if (!IS_ERR(server->client_acl))
+ rpc_shutdown_client(server->client_acl);
+ if (!IS_ERR(server->client))
+ rpc_shutdown_client(server->client);
+
+ nfs_put_client(server->nfs_client);
+
+ ida_destroy(&server->lockowner_id);
+ ida_destroy(&server->openowner_id);
+ nfs_free_iostats(server->io_stats);
+ bdi_destroy(&server->backing_dev_info);
+ kfree(server);
+ nfs_release_automount_timer();
+ dprintk("<-- nfs_free_server()\n");
+}
+
+/*
+ * Create a version 2 or 3 volume record
+ * - keyed on server and FSID
+ */
+struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_server *server;
+ struct nfs_fattr *fattr;
+ int error;
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ error = -ENOMEM;
+ fattr = nfs_alloc_fattr();
+ if (fattr == NULL)
+ goto error;
+
+ /* Get a client representation */
+ error = nfs_init_server(server, data);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ /* Probe the root fh to retrieve its FSID */
+ error = nfs_probe_fsinfo(server, mntfh, fattr);
+ if (error < 0)
+ goto error;
+ if (server->nfs_client->rpc_ops->version == 3) {
+ if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
+ server->namelen = NFS3_MAXNAMLEN;
+ if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
+ server->caps |= NFS_CAP_READDIRPLUS;
+ } else {
+ if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
+ server->namelen = NFS2_MAXNAMLEN;
+ }
+
+ if (!(fattr->valid & NFS_ATTR_FATTR)) {
+ error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
+ if (error < 0) {
+ dprintk("nfs_create_server: getattr error = %d\n", -error);
+ goto error;
+ }
+ }
+ memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
+
+ dprintk("Server FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ nfs_server_insert_lists(server);
+ server->mount_time = jiffies;
+ nfs_free_fattr(fattr);
+ return server;
+
+error:
+ nfs_free_fattr(fattr);
+ nfs_free_server(server);
+ return ERR_PTR(error);
+}
+
+#ifdef CONFIG_NFS_V4
+/*
+ * NFSv4.0 callback thread helper
+ *
+ * Find a client by callback identifier
+ */
+struct nfs_client *
+nfs4_find_client_ident(struct net *net, int cb_ident)
+{
+ struct nfs_client *clp;
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+
+ spin_lock(&nn->nfs_client_lock);
+ clp = idr_find(&nn->cb_ident_idr, cb_ident);
+ if (clp)
+ atomic_inc(&clp->cl_count);
+ spin_unlock(&nn->nfs_client_lock);
+ return clp;
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * NFSv4.1 callback thread helper
+ * For CB_COMPOUND calls, find a client by IP address, protocol version,
+ * minorversion, and sessionID
+ *
+ * Returns NULL if no such client
+ */
+struct nfs_client *
+nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
+ struct nfs4_sessionid *sid)
+{
+ struct nfs_client *clp;
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+
+ spin_lock(&nn->nfs_client_lock);
+ list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
+ if (nfs4_cb_match_client(addr, clp, 1) == false)
+ continue;
+
+ if (!nfs4_has_session(clp))
+ continue;
+
+ /* Match sessionid*/
+ if (memcmp(clp->cl_session->sess_id.data,
+ sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
+ continue;
+
+ atomic_inc(&clp->cl_count);
+ spin_unlock(&nn->nfs_client_lock);
+ return clp;
+ }
+ spin_unlock(&nn->nfs_client_lock);
+ return NULL;
+}
+
+#else /* CONFIG_NFS_V4_1 */
+
+struct nfs_client *
+nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
+ struct nfs4_sessionid *sid)
+{
+ return NULL;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * Initialize the NFS4 callback service
+ */
+static int nfs4_init_callback(struct nfs_client *clp)
+{
+ int error;
+
+ if (clp->rpc_ops->version == 4) {
+ struct rpc_xprt *xprt;
+
+ xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
+
+ if (nfs4_has_session(clp)) {
+ error = xprt_setup_backchannel(xprt,
+ NFS41_BC_MIN_CALLBACKS);
+ if (error < 0)
+ return error;
+ }
+
+ error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
+ if (error < 0) {
+ dprintk("%s: failed to start callback. Error = %d\n",
+ __func__, error);
+ return error;
+ }
+ __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
+ }
+ return 0;
+}
+
+/*
+ * Initialize the minor version specific parts of an NFS4 client record
+ */
+static int nfs4_init_client_minor_version(struct nfs_client *clp)
+{
+#if defined(CONFIG_NFS_V4_1)
+ if (clp->cl_mvops->minor_version) {
+ struct nfs4_session *session = NULL;
+ /*
+ * Create the session and mark it expired.
+ * When a SEQUENCE operation encounters the expired session
+ * it will do session recovery to initialize it.
+ */
+ session = nfs4_alloc_session(clp);
+ if (!session)
+ return -ENOMEM;
+
+ clp->cl_session = session;
+ /*
+ * The create session reply races with the server back
+ * channel probe. Mark the client NFS_CS_SESSION_INITING
+ * so that the client back channel can find the
+ * nfs_client struct
+ */
+ clp->cl_cons_state = NFS_CS_SESSION_INITING;
+ }
+#endif /* CONFIG_NFS_V4_1 */
+
+ return nfs4_init_callback(clp);
+}
+
+/*
+ * Initialise an NFS4 client record
+ */
+int nfs4_init_client(struct nfs_client *clp,
+ const struct rpc_timeout *timeparms,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int noresvport)
+{
+ char buf[INET6_ADDRSTRLEN + 1];
+ int error;
+
+ if (clp->cl_cons_state == NFS_CS_READY) {
+ /* the client is initialised already */
+ dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
+ return 0;
+ }
+
+ /* Check NFS protocol revision and initialize RPC op vector */
+ clp->rpc_ops = &nfs_v4_clientops;
+
+ error = nfs_create_rpc_client(clp, timeparms, authflavour,
+ 1, noresvport);
+ if (error < 0)
+ goto error;
+
+ /* If no clientaddr= option was specified, find a usable cb address */
+ if (ip_addr == NULL) {
+ struct sockaddr_storage cb_addr;
+ struct sockaddr *sap = (struct sockaddr *)&cb_addr;
+
+ error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
+ if (error < 0)
+ goto error;
+ error = rpc_ntop(sap, buf, sizeof(buf));
+ if (error < 0)
+ goto error;
+ ip_addr = (const char *)buf;
+ }
+ strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
+
+ error = nfs_idmap_new(clp);
+ if (error < 0) {
+ dprintk("%s: failed to create idmapper. Error = %d\n",
+ __func__, error);
+ goto error;
+ }
+ __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
+
+ error = nfs4_init_client_minor_version(clp);
+ if (error < 0)
+ goto error;
+
+ if (!nfs4_has_session(clp))
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ return 0;
+
+error:
+ nfs_mark_client_ready(clp, error);
+ dprintk("<-- nfs4_init_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Set up an NFS4 client
+ */
+static int nfs4_set_client(struct nfs_server *server,
+ const char *hostname,
+ const struct sockaddr *addr,
+ const size_t addrlen,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ int proto, const struct rpc_timeout *timeparms,
+ u32 minorversion, struct net *net)
+{
+ struct nfs_client_initdata cl_init = {
+ .hostname = hostname,
+ .addr = addr,
+ .addrlen = addrlen,
+ .rpc_ops = &nfs_v4_clientops,
+ .proto = proto,
+ .minorversion = minorversion,
+ .net = net,
+ };
+ struct nfs_client *clp;
+ int error;
+
+ dprintk("--> nfs4_set_client()\n");
+
+ /* Allocate or find a client reference we can use */
+ clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
+ server->flags & NFS_MOUNT_NORESVPORT);
+ if (IS_ERR(clp)) {
+ error = PTR_ERR(clp);
+ goto error;
+ }
+
+ /*
+ * Query for the lease time on clientid setup or renewal
+ *
+ * Note that this will be set on nfs_clients that were created
+ * only for the DS role and did not set this bit, but now will
+ * serve a dual role.
+ */
+ set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
+
+ server->nfs_client = clp;
+ dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
+ return 0;
+error:
+ dprintk("<-- nfs4_set_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Set up a pNFS Data Server client.
+ *
+ * Return any existing nfs_client that matches server address,port,version
+ * and minorversion.
+ *
+ * For a new nfs_client, use a soft mount (default), a low retrans and a
+ * low timeout interval so that if a connection is lost, we retry through
+ * the MDS.
+ */
+struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
+ const struct sockaddr *ds_addr,
+ int ds_addrlen, int ds_proto)
+{
+ struct nfs_client_initdata cl_init = {
+ .addr = ds_addr,
+ .addrlen = ds_addrlen,
+ .rpc_ops = &nfs_v4_clientops,
+ .proto = ds_proto,
+ .minorversion = mds_clp->cl_minorversion,
+ .net = mds_clp->net,
+ };
+ struct rpc_timeout ds_timeout = {
+ .to_initval = 15 * HZ,
+ .to_maxval = 15 * HZ,
+ .to_retries = 1,
+ .to_exponential = 1,
+ };
+ struct nfs_client *clp;
+
+ /*
+ * Set an authflavor equual to the MDS value. Use the MDS nfs_client
+ * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
+ * (section 13.1 RFC 5661).
+ */
+ clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
+ mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
+
+ dprintk("<-- %s %p\n", __func__, clp);
+ return clp;
+}
+EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
+
+/*
+ * Session has been established, and the client marked ready.
+ * Set the mount rsize and wsize with negotiated fore channel
+ * attributes which will be bound checked in nfs_server_set_fsinfo.
+ */
+static void nfs4_session_set_rwsize(struct nfs_server *server)
+{
+#ifdef CONFIG_NFS_V4_1
+ struct nfs4_session *sess;
+ u32 server_resp_sz;
+ u32 server_rqst_sz;
+
+ if (!nfs4_has_session(server->nfs_client))
+ return;
+ sess = server->nfs_client->cl_session;
+ server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
+ server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
+
+ if (server->rsize > server_resp_sz)
+ server->rsize = server_resp_sz;
+ if (server->wsize > server_rqst_sz)
+ server->wsize = server_rqst_sz;
+#endif /* CONFIG_NFS_V4_1 */
+}
+
+static int nfs4_server_common_setup(struct nfs_server *server,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_fattr *fattr;
+ int error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ /* data servers support only a subset of NFSv4.1 */
+ if (is_ds_only_client(server->nfs_client))
+ return -EPROTONOSUPPORT;
+
+ fattr = nfs_alloc_fattr();
+ if (fattr == NULL)
+ return -ENOMEM;
+
+ /* We must ensure the session is initialised first */
+ error = nfs4_init_session(server);
+ if (error < 0)
+ goto out;
+
+ /* Probe the root fh to retrieve its FSID and filehandle */
+ error = nfs4_get_rootfh(server, mntfh);
+ if (error < 0)
+ goto out;
+
+ dprintk("Server FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+ dprintk("Mount FH: %d\n", mntfh->size);
+
+ nfs4_session_set_rwsize(server);
+
+ error = nfs_probe_fsinfo(server, mntfh, fattr);
+ if (error < 0)
+ goto out;
+
+ if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
+ server->namelen = NFS4_MAXNAMLEN;
+
+ nfs_server_insert_lists(server);
+ server->mount_time = jiffies;
+ server->destroy = nfs4_destroy_server;
+out:
+ nfs_free_fattr(fattr);
+ return error;
+}
+
+/*
+ * Create a version 4 volume record
+ */
+static int nfs4_init_server(struct nfs_server *server,
+ const struct nfs_parsed_mount_data *data)
+{
+ struct rpc_timeout timeparms;
+ int error;
+
+ dprintk("--> nfs4_init_server()\n");
+
+ nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
+ data->timeo, data->retrans);
+
+ /* Initialise the client representation from the mount data */
+ server->flags = data->flags;
+ server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
+ if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
+ server->caps |= NFS_CAP_READDIRPLUS;
+ server->options = data->options;
+
+ /* Get a client record */
+ error = nfs4_set_client(server,
+ data->nfs_server.hostname,
+ (const struct sockaddr *)&data->nfs_server.address,
+ data->nfs_server.addrlen,
+ data->client_address,
+ data->auth_flavors[0],
+ data->nfs_server.protocol,
+ &timeparms,
+ data->minorversion,
+ data->net);
+ if (error < 0)
+ goto error;
+
+ /*
+ * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
+ * authentication.
+ */
+ if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
+ server->caps |= NFS_CAP_UIDGID_NOMAP;
+
+ if (data->rsize)
+ server->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ server->wsize = nfs_block_size(data->wsize, NULL);
+
+ server->acregmin = data->acregmin * HZ;
+ server->acregmax = data->acregmax * HZ;
+ server->acdirmin = data->acdirmin * HZ;
+ server->acdirmax = data->acdirmax * HZ;
+
+ server->port = data->nfs_server.port;
+
+ error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
+
+error:
+ /* Done */
+ dprintk("<-- nfs4_init_server() = %d\n", error);
+ return error;
+}
+
+/*
+ * Create a version 4 volume record
+ * - keyed on server and FSID
+ */
+struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_server *server;
+ int error;
+
+ dprintk("--> nfs4_create_server()\n");
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* set up the general RPC client */
+ error = nfs4_init_server(server, data);
+ if (error < 0)
+ goto error;
+
+ error = nfs4_server_common_setup(server, mntfh);
+ if (error < 0)
+ goto error;
+
+ dprintk("<-- nfs4_create_server() = %p\n", server);
+ return server;
+
+error:
+ nfs_free_server(server);
+ dprintk("<-- nfs4_create_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+/*
+ * Create an NFS4 referral server record
+ */
+struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_client *parent_client;
+ struct nfs_server *server, *parent_server;
+ int error;
+
+ dprintk("--> nfs4_create_referral_server()\n");
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ parent_server = NFS_SB(data->sb);
+ parent_client = parent_server->nfs_client;
+
+ /* Initialise the client representation from the parent server */
+ nfs_server_copy_userdata(server, parent_server);
+ server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
+
+ /* Get a client representation.
+ * Note: NFSv4 always uses TCP, */
+ error = nfs4_set_client(server, data->hostname,
+ data->addr,
+ data->addrlen,
+ parent_client->cl_ipaddr,
+ data->authflavor,
+ rpc_protocol(parent_server->client),
+ parent_server->client->cl_timeout,
+ parent_client->cl_mvops->minor_version,
+ parent_client->net);
+ if (error < 0)
+ goto error;
+
+ error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
+ if (error < 0)
+ goto error;
+
+ error = nfs4_server_common_setup(server, mntfh);
+ if (error < 0)
+ goto error;
+
+ dprintk("<-- nfs_create_referral_server() = %p\n", server);
+ return server;
+
+error:
+ nfs_free_server(server);
+ dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+#endif /* CONFIG_NFS_V4 */
+
+/*
+ * Clone an NFS2, NFS3 or NFS4 server record
+ */
+struct nfs_server *nfs_clone_server(struct nfs_server *source,
+ struct nfs_fh *fh,
+ struct nfs_fattr *fattr,
+ rpc_authflavor_t flavor)
+{
+ struct nfs_server *server;
+ struct nfs_fattr *fattr_fsinfo;
+ int error;
+
+ dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
+ (unsigned long long) fattr->fsid.major,
+ (unsigned long long) fattr->fsid.minor);
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ error = -ENOMEM;
+ fattr_fsinfo = nfs_alloc_fattr();
+ if (fattr_fsinfo == NULL)
+ goto out_free_server;
+
+ /* Copy data from the source */
+ server->nfs_client = source->nfs_client;
+ server->destroy = source->destroy;
+ atomic_inc(&server->nfs_client->cl_count);
+ nfs_server_copy_userdata(server, source);
+
+ server->fsid = fattr->fsid;
+
+ error = nfs_init_server_rpcclient(server,
+ source->client->cl_timeout,
+ flavor);
+ if (error < 0)
+ goto out_free_server;
+ if (!IS_ERR(source->client_acl))
+ nfs_init_server_aclclient(server);
+
+ /* probe the filesystem info for this server filesystem */
+ error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
+ if (error < 0)
+ goto out_free_server;
+
+ if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
+ server->namelen = NFS4_MAXNAMLEN;
+
+ dprintk("Cloned FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ error = nfs_start_lockd(server);
+ if (error < 0)
+ goto out_free_server;
+
+ nfs_server_insert_lists(server);
+ server->mount_time = jiffies;
+
+ nfs_free_fattr(fattr_fsinfo);
+ dprintk("<-- nfs_clone_server() = %p\n", server);
+ return server;
+
+out_free_server:
+ nfs_free_fattr(fattr_fsinfo);
+ nfs_free_server(server);
+ dprintk("<-- nfs_clone_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+void nfs_clients_init(struct net *net)
+{
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+
+ INIT_LIST_HEAD(&nn->nfs_client_list);
+ INIT_LIST_HEAD(&nn->nfs_volume_list);
+#ifdef CONFIG_NFS_V4
+ idr_init(&nn->cb_ident_idr);
+#endif
+ spin_lock_init(&nn->nfs_client_lock);
+}
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *proc_fs_nfs;
+
+static int nfs_server_list_open(struct inode *inode, struct file *file);
+static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_server_list_stop(struct seq_file *p, void *v);
+static int nfs_server_list_show(struct seq_file *m, void *v);
+
+static const struct seq_operations nfs_server_list_ops = {
+ .start = nfs_server_list_start,
+ .next = nfs_server_list_next,
+ .stop = nfs_server_list_stop,
+ .show = nfs_server_list_show,
+};
+
+static const struct file_operations nfs_server_list_fops = {
+ .open = nfs_server_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+ .owner = THIS_MODULE,
+};
+
+static int nfs_volume_list_open(struct inode *inode, struct file *file);
+static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_volume_list_stop(struct seq_file *p, void *v);
+static int nfs_volume_list_show(struct seq_file *m, void *v);
+
+static const struct seq_operations nfs_volume_list_ops = {
+ .start = nfs_volume_list_start,
+ .next = nfs_volume_list_next,
+ .stop = nfs_volume_list_stop,
+ .show = nfs_volume_list_show,
+};
+
+static const struct file_operations nfs_volume_list_fops = {
+ .open = nfs_volume_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+ .owner = THIS_MODULE,
+};
+
+/*
+ * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
+ * we're dealing
+ */
+static int nfs_server_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+ struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
+ struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
+
+ ret = seq_open(file, &nfs_server_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = net;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the server list and return the first item
+ */
+static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct nfs_net *nn = net_generic(m->private, nfs_net_id);
+
+ /* lock the list against modification */
+ spin_lock(&nn->nfs_client_lock);
+ return seq_list_start_head(&nn->nfs_client_list, *_pos);
+}
+
+/*
+ * move to next server
+ */
+static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct nfs_net *nn = net_generic(p->private, nfs_net_id);
+
+ return seq_list_next(v, &nn->nfs_client_list, pos);
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_server_list_stop(struct seq_file *p, void *v)
+{
+ struct nfs_net *nn = net_generic(p->private, nfs_net_id);
+
+ spin_unlock(&nn->nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_server_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_client *clp;
+ struct nfs_net *nn = net_generic(m->private, nfs_net_id);
+
+ /* display header on line 1 */
+ if (v == &nn->nfs_client_list) {
+ seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
+ return 0;
+ }
+
+ /* display one transport per line on subsequent lines */
+ clp = list_entry(v, struct nfs_client, cl_share_link);
+
+ /* Check if the client is initialized */
+ if (clp->cl_cons_state != NFS_CS_READY)
+ return 0;
+
+ rcu_read_lock();
+ seq_printf(m, "v%u %s %s %3d %s\n",
+ clp->rpc_ops->version,
+ rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
+ rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
+ atomic_read(&clp->cl_count),
+ clp->cl_hostname);
+ rcu_read_unlock();
+
+ return 0;
+}
+
+/*
+ * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
+ */
+static int nfs_volume_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+ struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
+ struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
+
+ ret = seq_open(file, &nfs_volume_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = net;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the volume list and return the first item
+ */
+static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct nfs_net *nn = net_generic(m->private, nfs_net_id);
+
+ /* lock the list against modification */
+ spin_lock(&nn->nfs_client_lock);
+ return seq_list_start_head(&nn->nfs_volume_list, *_pos);
+}
+
+/*
+ * move to next volume
+ */
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct nfs_net *nn = net_generic(p->private, nfs_net_id);
+
+ return seq_list_next(v, &nn->nfs_volume_list, pos);
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_volume_list_stop(struct seq_file *p, void *v)
+{
+ struct nfs_net *nn = net_generic(p->private, nfs_net_id);
+
+ spin_unlock(&nn->nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_volume_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_server *server;
+ struct nfs_client *clp;
+ char dev[8], fsid[17];
+ struct nfs_net *nn = net_generic(m->private, nfs_net_id);
+
+ /* display header on line 1 */
+ if (v == &nn->nfs_volume_list) {
+ seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
+ return 0;
+ }
+ /* display one transport per line on subsequent lines */
+ server = list_entry(v, struct nfs_server, master_link);
+ clp = server->nfs_client;
+
+ snprintf(dev, 8, "%u:%u",
+ MAJOR(server->s_dev), MINOR(server->s_dev));
+
+ snprintf(fsid, 17, "%llx:%llx",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ rcu_read_lock();
+ seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
+ clp->rpc_ops->version,
+ rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
+ rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
+ dev,
+ fsid,
+ nfs_server_fscache_state(server));
+ rcu_read_unlock();
+
+ return 0;
+}
+
+/*
+ * initialise the /proc/fs/nfsfs/ directory
+ */
+int __init nfs_fs_proc_init(void)
+{
+ struct proc_dir_entry *p;
+
+ proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
+ if (!proc_fs_nfs)
+ goto error_0;
+
+ /* a file of servers with which we're dealing */
+ p = proc_create("servers", S_IFREG|S_IRUGO,
+ proc_fs_nfs, &nfs_server_list_fops);
+ if (!p)
+ goto error_1;
+
+ /* a file of volumes that we have mounted */
+ p = proc_create("volumes", S_IFREG|S_IRUGO,
+ proc_fs_nfs, &nfs_volume_list_fops);
+ if (!p)
+ goto error_2;
+ return 0;
+
+error_2:
+ remove_proc_entry("servers", proc_fs_nfs);
+error_1:
+ remove_proc_entry("fs/nfsfs", NULL);
+error_0:
+ return -ENOMEM;
+}
+
+/*
+ * clean up the /proc/fs/nfsfs/ directory
+ */
+void nfs_fs_proc_exit(void)
+{
+ remove_proc_entry("volumes", proc_fs_nfs);
+ remove_proc_entry("servers", proc_fs_nfs);
+ remove_proc_entry("fs/nfsfs", NULL);
+}
+
+#endif /* CONFIG_PROC_FS */
+
+module_param(nfs4_disable_idmapping, bool, 0644);
+MODULE_PARM_DESC(nfs4_disable_idmapping,
+ "Turn off NFSv4 idmapping when using 'sec=sys'");