diff options
Diffstat (limited to 'fs/nfs/client.c')
| -rw-r--r-- | fs/nfs/client.c | 1084 |
1 files changed, 363 insertions, 721 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 0870d0d4efc..1d09289c8f0 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -36,11 +36,13 @@ #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 <asm/system.h> #include "nfs4_fs.h" #include "callback.h" @@ -49,64 +51,96 @@ #include "internal.h" #include "fscache.h" #include "pnfs.h" +#include "nfs.h" +#include "netns.h" #define NFSDBG_FACILITY NFSDBG_CLIENT -static DEFINE_SPINLOCK(nfs_client_lock); -static LIST_HEAD(nfs_client_list); -static LIST_HEAD(nfs_volume_list); static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); +static DEFINE_SPINLOCK(nfs_version_lock); +static DEFINE_MUTEX(nfs_version_mutex); +static LIST_HEAD(nfs_versions); /* * RPC cruft for NFS */ -static 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 +static const struct rpc_version *nfs_version[5] = { + [2] = NULL, + [3] = NULL, + [4] = NULL, }; -struct rpc_program nfs_program = { +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_dir_name = NFS_PIPE_DIRNAME, }; struct rpc_stat nfs_rpcstat = { .program = &nfs_program }; +static struct nfs_subversion *find_nfs_version(unsigned int version) +{ + struct nfs_subversion *nfs; + spin_lock(&nfs_version_lock); -#ifdef CONFIG_NFS_V3_ACL -static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; -static struct rpc_version * nfsacl_version[] = { - [3] = &nfsacl_version3, -}; + list_for_each_entry(nfs, &nfs_versions, list) { + if (nfs->rpc_ops->version == version) { + spin_unlock(&nfs_version_lock); + return nfs; + } + } -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; -}; + spin_unlock(&nfs_version_lock); + return ERR_PTR(-EPROTONOSUPPORT); +} + +struct nfs_subversion *get_nfs_version(unsigned int version) +{ + struct nfs_subversion *nfs = find_nfs_version(version); + + if (IS_ERR(nfs)) { + mutex_lock(&nfs_version_mutex); + request_module("nfsv%d", version); + nfs = find_nfs_version(version); + mutex_unlock(&nfs_version_mutex); + } + + if (!IS_ERR(nfs)) + try_module_get(nfs->owner); + return nfs; +} + +void put_nfs_version(struct nfs_subversion *nfs) +{ + module_put(nfs->owner); +} + +void register_nfs_version(struct nfs_subversion *nfs) +{ + spin_lock(&nfs_version_lock); + + list_add(&nfs->list, &nfs_versions); + nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; + + spin_unlock(&nfs_version_lock); +} +EXPORT_SYMBOL_GPL(register_nfs_version); + +void unregister_nfs_version(struct nfs_subversion *nfs) +{ + spin_lock(&nfs_version_lock); + + nfs_version[nfs->rpc_ops->version] = NULL; + list_del(&nfs->list); + + spin_unlock(&nfs_version_lock); +} +EXPORT_SYMBOL_GPL(unregister_nfs_version); /* * Allocate a shared client record @@ -114,7 +148,7 @@ struct nfs_client_initdata { * 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 *nfs_alloc_client(const struct nfs_client_initdata *cl_init) { struct nfs_client *clp; struct rpc_cred *cred; @@ -123,7 +157,10 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) goto error_0; - clp->rpc_ops = cl_init->rpc_ops; + clp->cl_nfs_mod = cl_init->nfs_mod; + try_module_get(clp->cl_nfs_mod->owner); + + clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; atomic_set(&clp->cl_count, 1); clp->cl_cons_state = NFS_CS_INITING; @@ -142,85 +179,67 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ clp->cl_rpcclient = ERR_PTR(-EINVAL); clp->cl_proto = cl_init->proto; + clp->cl_net = get_net(cl_init->net); -#ifdef CONFIG_NFS_V4 - INIT_LIST_HEAD(&clp->cl_delegations); - 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(); + cred = rpc_lookup_machine_cred("*"); if (!IS_ERR(cred)) clp->cl_machine_cred = cred; -#if defined(CONFIG_NFS_V4_1) - INIT_LIST_HEAD(&clp->cl_layouts); -#endif nfs_fscache_get_client_cookie(clp); return clp; error_cleanup: + put_nfs_version(clp->cl_nfs_mod); kfree(clp); error_0: return ERR_PTR(err); } +EXPORT_SYMBOL_GPL(nfs_alloc_client); -#ifdef CONFIG_NFS_V4 -/* - * Clears/puts all minor version specific parts from an nfs_client struct - * reverting it to minorversion 0. - */ -static void nfs4_clear_client_minor_version(struct nfs_client *clp) +#if IS_ENABLED(CONFIG_NFS_V4) +void nfs_cleanup_cb_ident_idr(struct net *net) { -#ifdef CONFIG_NFS_V4_1 - if (nfs4_has_session(clp)) { - nfs4_destroy_session(clp->cl_session); - clp->cl_session = NULL; - } + struct nfs_net *nn = net_generic(net, nfs_net_id); - clp->cl_mvops = nfs_v4_minor_ops[0]; -#endif /* CONFIG_NFS_V4_1 */ + idr_destroy(&nn->cb_ident_idr); } -/* - * Destroy the NFS4 callback service - */ -static void nfs4_destroy_callback(struct nfs_client *clp) +/* nfs_client_lock held */ +static void nfs_cb_idr_remove_locked(struct nfs_client *clp) { - if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) - nfs_callback_down(clp->cl_mvops->minor_version); + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + + if (clp->cl_cb_ident) + idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); } -static void nfs4_shutdown_client(struct nfs_client *clp) +static void pnfs_init_server(struct nfs_server *server) { - if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) - nfs4_kill_renewd(clp); - nfs4_clear_client_minor_version(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); + rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); } + #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) +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 */ @@ -230,29 +249,36 @@ static void nfs_free_client(struct nfs_client *clp) if (clp->cl_machine_cred != NULL) put_rpccred(clp->cl_machine_cred); + put_net(clp->cl_net); + put_nfs_version(clp->cl_nfs_mod); kfree(clp->cl_hostname); kfree(clp); dprintk("<-- nfs_free_client()\n"); } +EXPORT_SYMBOL_GPL(nfs_free_client); /* * 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->cl_net, nfs_net_id); - if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { + if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { list_del(&clp->cl_share_link); - spin_unlock(&nfs_client_lock); + nfs_cb_idr_remove_locked(clp); + spin_unlock(&nn->nfs_client_lock); - BUG_ON(!list_empty(&clp->cl_superblocks)); + WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); - nfs_free_client(clp); + clp->rpc_ops->free_client(clp); } } EXPORT_SYMBOL_GPL(nfs_put_client); @@ -275,11 +301,12 @@ static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; - if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && - sin1->sin6_scope_id != sin2->sin6_scope_id) + 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 ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); + return 1; } #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, @@ -325,12 +352,13 @@ static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, (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) +int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, + const struct sockaddr *sa2) { if (sa1->sa_family != sa2->sa_family) return 0; @@ -343,6 +371,8 @@ static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, } return 0; } +EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr); +#endif /* CONFIG_NFS_V4_1 */ /* * Test if two socket addresses represent the same actual socket, @@ -364,72 +394,6 @@ static int nfs_sockaddr_cmp(const struct sockaddr *sa1, } /* - * Find a client by IP address and protocol version - * - returns NULL if no such client - */ -struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) -{ - struct nfs_client *clp; - - spin_lock(&nfs_client_lock); - list_for_each_entry(clp, &nfs_client_list, cl_share_link) { - struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; - - /* Don't match clients that failed to initialise properly */ - if (!(clp->cl_cons_state == NFS_CS_READY || - clp->cl_cons_state == NFS_CS_SESSION_INITING)) - continue; - - /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops->version != nfsversion) - continue; - - /* Match only the IP address, not the port number */ - if (!nfs_sockaddr_match_ipaddr(addr, clap)) - continue; - - atomic_inc(&clp->cl_count); - spin_unlock(&nfs_client_lock); - return clp; - } - spin_unlock(&nfs_client_lock); - return NULL; -} - -/* - * Find a client by IP address and protocol version - * - returns NULL if no such client - */ -struct nfs_client *nfs_find_client_next(struct nfs_client *clp) -{ - struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; - u32 nfsvers = clp->rpc_ops->version; - - spin_lock(&nfs_client_lock); - list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { - struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; - - /* Don't match clients that failed to initialise properly */ - if (clp->cl_cons_state != NFS_CS_READY) - continue; - - /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops->version != nfsvers) - continue; - - /* Match only the IP address, not the port number */ - if (!nfs_sockaddr_match_ipaddr(sap, clap)) - continue; - - atomic_inc(&clp->cl_count); - spin_unlock(&nfs_client_lock); - return clp; - } - spin_unlock(&nfs_client_lock); - return NULL; -} - -/* * Find an nfs_client on the list that matches the initialisation data * that is supplied. */ @@ -437,15 +401,16 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat { 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, &nfs_client_list, cl_share_link) { + 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) + if (clp->rpc_ops != data->nfs_mod->rpc_ops) continue; if (clp->cl_proto != data->proto) @@ -463,55 +428,28 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat return NULL; } +static bool nfs_client_init_is_complete(const struct nfs_client *clp) +{ + return clp->cl_cons_state != NFS_CS_INITING; +} + +int nfs_wait_client_init_complete(const struct nfs_client *clp) +{ + return wait_event_killable(nfs_client_active_wq, + nfs_client_init_is_complete(clp)); +} +EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); + /* - * Look up a client by IP address and protocol version - * - creates a new record if one doesn't yet exist + * Found an existing client. Make sure it's ready before returning. */ -static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) +static struct nfs_client * +nfs_found_client(const struct nfs_client_initdata *cl_init, + struct nfs_client *clp) { - struct nfs_client *clp, *new = NULL; int error; - 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(&nfs_client_lock); - - clp = nfs_match_client(cl_init); - if (clp) - goto found_client; - if (new) - goto install_client; - - spin_unlock(&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, &nfs_client_list); - spin_unlock(&nfs_client_lock); - 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(&nfs_client_lock); - - if (new) - nfs_free_client(new); - - error = wait_event_killable(nfs_client_active_wq, - clp->cl_cons_state < NFS_CS_INITING); + error = nfs_wait_client_init_complete(clp); if (error < 0) { nfs_put_client(clp); return ERR_PTR(-ERESTARTSYS); @@ -523,41 +461,75 @@ found_client: return ERR_PTR(error); } - BUG_ON(clp->cl_cons_state != NFS_CS_READY); + smp_rmb(); - dprintk("--> nfs_get_client() = %p [share]\n", clp); + dprintk("<-- %s found nfs_client %p for %s\n", + __func__, clp, cl_init->hostname ?: ""); return clp; } /* - * Mark a server as ready or failed + * Look up a client by IP address and protocol version + * - creates a new record if one doesn't yet exist */ -void nfs_mark_client_ready(struct nfs_client *clp, int state) +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) { - clp->cl_cons_state = state; - wake_up_all(&nfs_client_active_wq); + struct nfs_client *clp, *new = NULL; + struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); + const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; + + dprintk("--> nfs_get_client(%s,v%u)\n", + cl_init->hostname ?: "", rpc_ops->version); + + /* see if the client already exists */ + do { + spin_lock(&nn->nfs_client_lock); + + clp = nfs_match_client(cl_init); + if (clp) { + spin_unlock(&nn->nfs_client_lock); + if (new) + new->rpc_ops->free_client(new); + return nfs_found_client(cl_init, clp); + } + if (new) { + list_add_tail(&new->cl_share_link, + &nn->nfs_client_list); + spin_unlock(&nn->nfs_client_lock); + new->cl_flags = cl_init->init_flags; + return rpc_ops->init_client(new, timeparms, ip_addr); + } + + spin_unlock(&nn->nfs_client_lock); + + new = rpc_ops->alloc_client(cl_init); + } while (!IS_ERR(new)); + + dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", + cl_init->hostname ?: "", PTR_ERR(new)); + return new; } +EXPORT_SYMBOL_GPL(nfs_get_client); /* - * 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. + * Mark a server as ready or failed */ -int nfs4_check_client_ready(struct nfs_client *clp) +void nfs_mark_client_ready(struct nfs_client *clp, int state) { - if (!nfs4_has_session(clp)) - return 0; - if (clp->cl_cons_state < NFS_CS_READY) - return -EPROTONOSUPPORT; - return 0; + smp_wmb(); + clp->cl_cons_state = state; + wake_up_all(&nfs_client_active_wq); } +EXPORT_SYMBOL_GPL(nfs_mark_client_ready); /* * Initialise the timeout values for a connection */ -static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, +void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) { to->to_initval = timeo * HZ / 10; @@ -594,18 +566,18 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, BUG(); } } +EXPORT_SYMBOL_GPL(nfs_init_timeout_values); /* * 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) +int nfs_create_rpc_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + rpc_authflavor_t flavor) { struct rpc_clnt *clnt = NULL; struct rpc_create_args args = { - .net = &init_net, + .net = clp->cl_net, .protocol = clp->cl_proto, .address = (struct sockaddr *)&clp->cl_addr, .addrsize = clp->cl_addrlen, @@ -616,10 +588,14 @@ static int nfs_create_rpc_client(struct nfs_client *clp, .authflavor = flavor, }; - if (discrtry) + if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) args.flags |= RPC_CLNT_CREATE_DISCRTRY; - if (noresvport) + if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) + args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; + if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; + if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) + args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; if (!IS_ERR(clp->cl_rpcclient)) return 0; @@ -634,14 +610,14 @@ static int nfs_create_rpc_client(struct nfs_client *clp, clp->cl_rpcclient = clnt; return 0; } +EXPORT_SYMBOL_GPL(nfs_create_rpc_client); /* * 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)) + if (server->nlm_host) nlmclnt_done(server->nlm_host); } @@ -659,6 +635,7 @@ static int nfs_start_lockd(struct nfs_server *server) .nfs_version = clp->rpc_ops->version, .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? 1 : 0, + .net = clp->cl_net, }; if (nlm_init.nfs_version > 3) @@ -685,45 +662,16 @@ static int nfs_start_lockd(struct nfs_server *server) } /* - * 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, +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); + server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, + pseudoflavour); if (IS_ERR(server->client)) { dprintk("%s: couldn't create rpc_client!\n", __func__); return PTR_ERR(server->client); @@ -733,67 +681,67 @@ static int nfs_init_server_rpcclient(struct nfs_server *server, 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; } +EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); -/* - * Initialise an NFS2 or NFS3 client +/** + * nfs_init_client - Initialise an NFS2 or NFS3 client + * + * @clp: nfs_client to initialise + * @timeparms: timeout parameters for underlying RPC transport + * @ip_addr: IP presentation address (not used) + * + * Returns pointer to an NFS client, or an ERR_PTR value. */ -static int nfs_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const struct nfs_parsed_mount_data *data) +struct nfs_client *nfs_init_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + const char *ip_addr) { 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; + return clp; } /* * 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, data->flags & NFS_MOUNT_NORESVPORT); + error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); if (error < 0) goto error; nfs_mark_client_ready(clp, NFS_CS_READY); - return 0; + return clp; error: nfs_mark_client_ready(clp, error); + nfs_put_client(clp); dprintk("<-- nfs_init_client() = xerror %d\n", error); - return error; + return ERR_PTR(error); } +EXPORT_SYMBOL_GPL(nfs_init_client); /* * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_parsed_mount_data *data) + const struct nfs_parsed_mount_data *data, + struct nfs_subversion *nfs_mod) { 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, + .nfs_mod = nfs_mod, .proto = data->nfs_server.protocol, + .net = data->net, }; struct rpc_timeout timeparms; struct nfs_client *clp; @@ -801,24 +749,18 @@ static int nfs_init_server(struct nfs_server *server, 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); + if (data->flags & NFS_MOUNT_NORESVPORT) + set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ - clp = nfs_get_client(&cl_init); + clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); if (IS_ERR(clp)) { dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); return PTR_ERR(clp); } - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); - error = nfs_init_client(clp, &timeparms, data); - if (error < 0) - goto error; - server->nfs_client = clp; /* Initialise the client representation from the mount data */ @@ -826,7 +768,7 @@ static int nfs_init_server(struct nfs_server *server, 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; + NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; if (data->rsize) server->rsize = nfs_block_size(data->rsize, NULL); @@ -844,8 +786,10 @@ static int nfs_init_server(struct nfs_server *server, goto error; server->port = data->nfs_server.port; + server->auth_info = data->auth_info; - error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); + error = nfs_init_server_rpcclient(server, &timeparms, + data->selected_flavor); if (error < 0) goto error; @@ -860,8 +804,6 @@ static int nfs_init_server(struct nfs_server *server, 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; @@ -875,7 +817,9 @@ 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_fsinfo *fsinfo) +static void nfs_server_set_fsinfo(struct nfs_server *server, + struct nfs_fh *mntfh, + struct nfs_fsinfo *fsinfo) { unsigned long max_rpc_payload; @@ -905,7 +849,6 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo * 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; - set_pnfs_layoutdriver(server, fsinfo->layouttype); server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); @@ -931,7 +874,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo * /* * 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) +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; @@ -951,7 +894,7 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str if (error < 0) goto out_error; - nfs_server_set_fsinfo(server, &fsinfo); + nfs_server_set_fsinfo(server, mntfh, &fsinfo); /* Get some general file system info */ if (server->namelen == 0) { @@ -971,11 +914,12 @@ out_error: dprintk("nfs_probe_fsinfo: error = %d\n", -error); return error; } +EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); /* * Copy useful information when duplicating a server record */ -static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) +void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) { target->flags = source->flags; target->rsize = source->rsize; @@ -986,12 +930,47 @@ static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_serve target->acdirmax = source->acdirmax; target->caps = source->caps; target->options = source->options; + target->auth_info = source->auth_info; } +EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); + +void nfs_server_insert_lists(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs_net *nn = net_generic(clp->cl_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); + +} +EXPORT_SYMBOL_GPL(nfs_server_insert_lists); + +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->cl_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(); +} +EXPORT_SYMBOL_GPL(nfs_server_remove_lists); /* * Allocate and initialise a server record */ -static struct nfs_server *nfs_alloc_server(void) +struct nfs_server *nfs_alloc_server(void) { struct nfs_server *server; @@ -1004,6 +983,9 @@ static struct nfs_server *nfs_alloc_server(void) /* 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); @@ -1019,8 +1001,13 @@ static struct nfs_server *nfs_alloc_server(void) return NULL; } + ida_init(&server->openowner_id); + ida_init(&server->lockowner_id); + pnfs_init_server(server); + return server; } +EXPORT_SYMBOL_GPL(nfs_alloc_server); /* * Free up a server record @@ -1029,11 +1016,7 @@ void nfs_free_server(struct nfs_server *server) { dprintk("--> nfs_free_server()\n"); - unset_pnfs_layoutdriver(server); - spin_lock(&nfs_client_lock); - list_del(&server->client_link); - list_del(&server->master_link); - spin_unlock(&nfs_client_lock); + nfs_server_remove_lists(server); if (server->destroy != NULL) server->destroy(server); @@ -1045,19 +1028,22 @@ void nfs_free_server(struct nfs_server *server) 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"); } +EXPORT_SYMBOL_GPL(nfs_free_server); /* * 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 *nfs_create_server(struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) { struct nfs_server *server; struct nfs_fattr *fattr; @@ -1073,22 +1059,18 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, goto error; /* Get a client representation */ - error = nfs_init_server(server, data); + error = nfs_init_server(server, mount_info->parsed, nfs_mod); 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); + error = nfs_probe_fsinfo(server, mount_info->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)) + if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) server->caps |= NFS_CAP_READDIRPLUS; } else { if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) @@ -1096,7 +1078,7 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, } if (!(fattr->valid & NFS_ATTR_FATTR)) { - error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); + error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL); if (error < 0) { dprintk("nfs_create_server: getattr error = %d\n", -error); goto error; @@ -1108,11 +1090,7 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, (unsigned long long) server->fsid.major, (unsigned long long) server->fsid.minor); - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; nfs_free_fattr(fattr); return server; @@ -1122,386 +1100,15 @@ error: nfs_free_server(server); return ERR_PTR(error); } - -#ifdef CONFIG_NFS_V4 -/* - * Initialize the NFS4 callback service - */ -static int nfs4_init_callback(struct nfs_client *clp) -{ - int error; - - if (clp->rpc_ops->version == 4) { - if (nfs4_has_session(clp)) { - error = xprt_setup_backchannel( - clp->cl_rpcclient->cl_xprt, - NFS41_BC_MIN_CALLBACKS); - if (error < 0) - return error; - } - - error = nfs_callback_up(clp->cl_mvops->minor_version, - clp->cl_rpcclient->cl_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 - */ -static int nfs4_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const char *ip_addr, - rpc_authflavor_t authflavour, - int flags) -{ - 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, flags & NFS_MOUNT_NORESVPORT); - if (error < 0) - goto error; - 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 nfs_client_initdata cl_init = { - .hostname = hostname, - .addr = addr, - .addrlen = addrlen, - .rpc_ops = &nfs_v4_clientops, - .proto = proto, - .minorversion = minorversion, - }; - 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); - if (IS_ERR(clp)) { - error = PTR_ERR(clp); - goto error; - } - error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, - server->flags); - if (error < 0) - goto error_put; - - server->nfs_client = clp; - dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); - return 0; - -error_put: - nfs_put_client(clp); -error: - dprintk("<-- nfs4_set_client() = xerror %d\n", error); - return error; -} - - -/* - * 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); - - 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; - - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - - server->mount_time = jiffies; -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); - if (error < 0) - goto error; - - 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, - parent_server->client->cl_xprt->prot, - parent_server->client->cl_timeout, - parent_client->cl_mvops->minor_version); - 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 */ +EXPORT_SYMBOL_GPL(nfs_create_server); /* * 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) + struct nfs_fattr *fattr, + rpc_authflavor_t flavor) { struct nfs_server *server; struct nfs_fattr *fattr_fsinfo; @@ -1522,6 +1129,7 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, /* 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); @@ -1529,11 +1137,9 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, error = nfs_init_server_rpcclient(server, source->client->cl_timeout, - source->client->cl_auth->au_flavor); + 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); @@ -1551,11 +1157,7 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, if (error < 0) goto out_free_server; - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; nfs_free_fattr(fattr_fsinfo); @@ -1568,6 +1170,20 @@ out_free_server: dprintk("<-- nfs_clone_server() = error %d\n", error); return ERR_PTR(error); } +EXPORT_SYMBOL_GPL(nfs_clone_server); + +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); +#if IS_ENABLED(CONFIG_NFS_V4) + idr_init(&nn->cb_ident_idr); +#endif + spin_lock_init(&nn->nfs_client_lock); + nn->boot_time = CURRENT_TIME; +} #ifdef CONFIG_PROC_FS static struct proc_dir_entry *proc_fs_nfs; @@ -1622,13 +1238,15 @@ 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 = PDE(inode)->data; + m->private = net; return 0; } @@ -1638,9 +1256,11 @@ static int nfs_server_list_open(struct inode *inode, struct file *file) */ 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(&nfs_client_lock); - return seq_list_start_head(&nfs_client_list, *_pos); + spin_lock(&nn->nfs_client_lock); + return seq_list_start_head(&nn->nfs_client_list, *_pos); } /* @@ -1648,7 +1268,9 @@ static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) */ static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) { - return seq_list_next(v, &nfs_client_list, pos); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + return seq_list_next(v, &nn->nfs_client_list, pos); } /* @@ -1656,7 +1278,9 @@ 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) { - spin_unlock(&nfs_client_lock); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + spin_unlock(&nn->nfs_client_lock); } /* @@ -1665,9 +1289,10 @@ static void nfs_server_list_stop(struct seq_file *p, void *v) 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 == &nfs_client_list) { + if (v == &nn->nfs_client_list) { seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); return 0; } @@ -1675,12 +1300,18 @@ static int nfs_server_list_show(struct seq_file *m, void *v) /* 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; } @@ -1692,13 +1323,15 @@ 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 = PDE(inode)->data; + m->private = net; return 0; } @@ -1708,9 +1341,11 @@ static int nfs_volume_list_open(struct inode *inode, struct file *file) */ 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(&nfs_client_lock); - return seq_list_start_head(&nfs_volume_list, *_pos); + spin_lock(&nn->nfs_client_lock); + return seq_list_start_head(&nn->nfs_volume_list, *_pos); } /* @@ -1718,7 +1353,9 @@ static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) */ static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) { - return seq_list_next(v, &nfs_volume_list, pos); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + return seq_list_next(v, &nn->nfs_volume_list, pos); } /* @@ -1726,7 +1363,9 @@ 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) { - spin_unlock(&nfs_client_lock); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + spin_unlock(&nn->nfs_client_lock); } /* @@ -1737,9 +1376,10 @@ 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 == &nfs_volume_list) { + if (v == &nn->nfs_volume_list) { seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); return 0; } @@ -1754,6 +1394,7 @@ static int nfs_volume_list_show(struct seq_file *m, void *v) (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), @@ -1761,6 +1402,7 @@ static int nfs_volume_list_show(struct seq_file *m, void *v) dev, fsid, nfs_server_fscache_state(server)); + rcu_read_unlock(); return 0; } |