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- /* 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'");
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