diff options
Diffstat (limited to 'fs/nfsd/nfssvc.c')
| -rw-r--r-- | fs/nfsd/nfssvc.c | 214 |
1 files changed, 168 insertions, 46 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 378edcfe9701..520757774614 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -38,12 +38,18 @@ static int nfsd_acl_rpcbind_set(struct net *, u32, int, unsigned short, unsigned short); +static __be32 nfsd_acl_init_request(struct svc_rqst *, + const struct svc_program *, + struct svc_process_info *); #endif static int nfsd_rpcbind_set(struct net *, const struct svc_program *, u32, int, unsigned short, unsigned short); +static __be32 nfsd_init_request(struct svc_rqst *, + const struct svc_program *, + struct svc_process_info *); /* * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members @@ -98,7 +104,7 @@ static struct svc_program nfsd_acl_program = { .pg_class = "nfsd", .pg_stats = &nfsd_acl_svcstats, .pg_authenticate = &svc_set_client, - .pg_init_request = svc_generic_init_request, + .pg_init_request = nfsd_acl_init_request, .pg_rpcbind_set = nfsd_acl_rpcbind_set, }; @@ -119,7 +125,6 @@ static const struct svc_version *nfsd_version[] = { #define NFSD_MINVERS 2 #define NFSD_NRVERS ARRAY_SIZE(nfsd_version) -static const struct svc_version *nfsd_versions[NFSD_NRVERS]; struct svc_program nfsd_program = { #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) @@ -127,78 +132,136 @@ struct svc_program nfsd_program = { #endif .pg_prog = NFS_PROGRAM, /* program number */ .pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */ - .pg_vers = nfsd_versions, /* version table */ + .pg_vers = nfsd_version, /* version table */ .pg_name = "nfsd", /* program name */ .pg_class = "nfsd", /* authentication class */ .pg_stats = &nfsd_svcstats, /* version table */ .pg_authenticate = &svc_set_client, /* export authentication */ - .pg_init_request = svc_generic_init_request, + .pg_init_request = nfsd_init_request, .pg_rpcbind_set = nfsd_rpcbind_set, }; -static bool nfsd_supported_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1] = { - [0] = 1, - [1] = 1, - [2] = 1, -}; +static bool +nfsd_support_version(int vers) +{ + if (vers >= NFSD_MINVERS && vers < NFSD_NRVERS) + return nfsd_version[vers] != NULL; + return false; +} + +static bool * +nfsd_alloc_versions(void) +{ + bool *vers = kmalloc_array(NFSD_NRVERS, sizeof(bool), GFP_KERNEL); + unsigned i; + + if (vers) { + /* All compiled versions are enabled by default */ + for (i = 0; i < NFSD_NRVERS; i++) + vers[i] = nfsd_support_version(i); + } + return vers; +} + +static bool * +nfsd_alloc_minorversions(void) +{ + bool *vers = kmalloc_array(NFSD_SUPPORTED_MINOR_VERSION + 1, + sizeof(bool), GFP_KERNEL); + unsigned i; -int nfsd_vers(int vers, enum vers_op change) + if (vers) { + /* All minor versions are enabled by default */ + for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++) + vers[i] = nfsd_support_version(4); + } + return vers; +} + +void +nfsd_netns_free_versions(struct nfsd_net *nn) +{ + kfree(nn->nfsd_versions); + kfree(nn->nfsd4_minorversions); + nn->nfsd_versions = NULL; + nn->nfsd4_minorversions = NULL; +} + +static void +nfsd_netns_init_versions(struct nfsd_net *nn) +{ + if (!nn->nfsd_versions) { + nn->nfsd_versions = nfsd_alloc_versions(); + nn->nfsd4_minorversions = nfsd_alloc_minorversions(); + if (!nn->nfsd_versions || !nn->nfsd4_minorversions) + nfsd_netns_free_versions(nn); + } +} + +int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change) { if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS) return 0; switch(change) { case NFSD_SET: - nfsd_versions[vers] = nfsd_version[vers]; -#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) - if (vers < NFSD_ACL_NRVERS) - nfsd_acl_versions[vers] = nfsd_acl_version[vers]; -#endif + if (nn->nfsd_versions) + nn->nfsd_versions[vers] = nfsd_support_version(vers); break; case NFSD_CLEAR: - nfsd_versions[vers] = NULL; -#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) - if (vers < NFSD_ACL_NRVERS) - nfsd_acl_versions[vers] = NULL; -#endif + nfsd_netns_init_versions(nn); + if (nn->nfsd_versions) + nn->nfsd_versions[vers] = false; break; case NFSD_TEST: - return nfsd_versions[vers] != NULL; + if (nn->nfsd_versions) + return nn->nfsd_versions[vers]; + /* Fallthrough */ case NFSD_AVAIL: - return nfsd_version[vers] != NULL; + return nfsd_support_version(vers); } return 0; } static void -nfsd_adjust_nfsd_versions4(void) +nfsd_adjust_nfsd_versions4(struct nfsd_net *nn) { unsigned i; for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++) { - if (nfsd_supported_minorversions[i]) + if (nn->nfsd4_minorversions[i]) return; } - nfsd_vers(4, NFSD_CLEAR); + nfsd_vers(nn, 4, NFSD_CLEAR); } -int nfsd_minorversion(u32 minorversion, enum vers_op change) +int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change) { if (minorversion > NFSD_SUPPORTED_MINOR_VERSION && change != NFSD_AVAIL) return -1; + switch(change) { case NFSD_SET: - nfsd_supported_minorversions[minorversion] = true; - nfsd_vers(4, NFSD_SET); + if (nn->nfsd4_minorversions) { + nfsd_vers(nn, 4, NFSD_SET); + nn->nfsd4_minorversions[minorversion] = + nfsd_vers(nn, 4, NFSD_TEST); + } break; case NFSD_CLEAR: - nfsd_supported_minorversions[minorversion] = false; - nfsd_adjust_nfsd_versions4(); + nfsd_netns_init_versions(nn); + if (nn->nfsd4_minorversions) { + nn->nfsd4_minorversions[minorversion] = false; + nfsd_adjust_nfsd_versions4(nn); + } break; case NFSD_TEST: - return nfsd_supported_minorversions[minorversion]; + if (nn->nfsd4_minorversions) + return nn->nfsd4_minorversions[minorversion]; + return nfsd_vers(nn, 4, NFSD_TEST); case NFSD_AVAIL: - return minorversion <= NFSD_SUPPORTED_MINOR_VERSION; + return minorversion <= NFSD_SUPPORTED_MINOR_VERSION && + nfsd_vers(nn, 4, NFSD_AVAIL); } return 0; } @@ -280,13 +343,9 @@ static void nfsd_shutdown_generic(void) nfsd_racache_shutdown(); } -static bool nfsd_needs_lockd(void) +static bool nfsd_needs_lockd(struct nfsd_net *nn) { -#if defined(CONFIG_NFSD_V3) - return (nfsd_versions[2] != NULL) || (nfsd_versions[3] != NULL); -#else - return (nfsd_versions[2] != NULL); -#endif + return nfsd_vers(nn, 2, NFSD_TEST) || nfsd_vers(nn, 3, NFSD_TEST); } static int nfsd_startup_net(int nrservs, struct net *net) @@ -304,7 +363,7 @@ static int nfsd_startup_net(int nrservs, struct net *net) if (ret) goto out_socks; - if (nfsd_needs_lockd() && !nn->lockd_up) { + if (nfsd_needs_lockd(nn) && !nn->lockd_up) { ret = lockd_up(net); if (ret) goto out_socks; @@ -437,20 +496,20 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net) nfsd_export_flush(net); } -void nfsd_reset_versions(void) +void nfsd_reset_versions(struct nfsd_net *nn) { int i; for (i = 0; i < NFSD_NRVERS; i++) - if (nfsd_vers(i, NFSD_TEST)) + if (nfsd_vers(nn, i, NFSD_TEST)) return; for (i = 0; i < NFSD_NRVERS; i++) if (i != 4) - nfsd_vers(i, NFSD_SET); + nfsd_vers(nn, i, NFSD_SET); else { int minor = 0; - while (nfsd_minorversion(minor, NFSD_SET) >= 0) + while (nfsd_minorversion(nn, minor, NFSD_SET) >= 0) minor++; } } @@ -518,7 +577,7 @@ int nfsd_create_serv(struct net *net) } if (nfsd_max_blksize == 0) nfsd_max_blksize = nfsd_get_default_max_blksize(); - nfsd_reset_versions(); + nfsd_reset_versions(nn); nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize, &nfsd_thread_sv_ops); if (nn->nfsd_serv == NULL) @@ -697,11 +756,44 @@ nfsd_acl_rpcbind_set(struct net *net, const struct svc_program *progp, unsigned short port) { if (!nfsd_support_acl_version(version) || - !nfsd_vers(version, NFSD_TEST)) + !nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST)) return 0; return svc_generic_rpcbind_set(net, progp, version, family, proto, port); } + +static __be32 +nfsd_acl_init_request(struct svc_rqst *rqstp, + const struct svc_program *progp, + struct svc_process_info *ret) +{ + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + int i; + + if (likely(nfsd_support_acl_version(rqstp->rq_vers) && + nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST))) + return svc_generic_init_request(rqstp, progp, ret); + + ret->mismatch.lovers = NFSD_ACL_NRVERS; + for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++) { + if (nfsd_support_acl_version(rqstp->rq_vers) && + nfsd_vers(nn, i, NFSD_TEST)) { + ret->mismatch.lovers = i; + break; + } + } + if (ret->mismatch.lovers == NFSD_ACL_NRVERS) + return rpc_prog_unavail; + ret->mismatch.hivers = NFSD_ACL_MINVERS; + for (i = NFSD_ACL_NRVERS - 1; i >= NFSD_ACL_MINVERS; i--) { + if (nfsd_support_acl_version(rqstp->rq_vers) && + nfsd_vers(nn, i, NFSD_TEST)) { + ret->mismatch.hivers = i; + break; + } + } + return rpc_prog_mismatch; +} #endif static int @@ -709,12 +801,42 @@ nfsd_rpcbind_set(struct net *net, const struct svc_program *progp, u32 version, int family, unsigned short proto, unsigned short port) { - if (!nfsd_vers(version, NFSD_TEST)) + if (!nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST)) return 0; return svc_generic_rpcbind_set(net, progp, version, family, proto, port); } +static __be32 +nfsd_init_request(struct svc_rqst *rqstp, + const struct svc_program *progp, + struct svc_process_info *ret) +{ + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + int i; + + if (likely(nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST))) + return svc_generic_init_request(rqstp, progp, ret); + + ret->mismatch.lovers = NFSD_NRVERS; + for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) { + if (nfsd_vers(nn, i, NFSD_TEST)) { + ret->mismatch.lovers = i; + break; + } + } + if (ret->mismatch.lovers == NFSD_NRVERS) + return rpc_prog_unavail; + ret->mismatch.hivers = NFSD_MINVERS; + for (i = NFSD_NRVERS - 1; i >= NFSD_MINVERS; i--) { + if (nfsd_vers(nn, i, NFSD_TEST)) { + ret->mismatch.hivers = i; + break; + } + } + return rpc_prog_mismatch; +} + /* * This is the NFS server kernel thread */ |