diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/client.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfs/client.c | 2078 |
1 files changed, 0 insertions, 2078 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/client.c b/ANDROID_3.4.5/fs/nfs/client.c deleted file mode 100644 index 60f7e4ec..00000000 --- a/ANDROID_3.4.5/fs/nfs/client.c +++ /dev/null @@ -1,2078 +0,0 @@ -/* 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->flags & NFS_MOUNT_LOCAL_FLOCK) || - !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) - 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'"); |