| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Neil Brown | 441 | 43.58% | 12 | 30.77% |
| Trond Myklebust | 175 | 17.29% | 5 | 12.82% |
| Linus Torvalds (pre-git) | 133 | 13.14% | 4 | 10.26% |
| Weston Andros Adamson | 130 | 12.85% | 1 | 2.56% |
| Chuck Lever | 62 | 6.13% | 6 | 15.38% |
| Peter Zijlstra | 32 | 3.16% | 2 | 5.13% |
| J. Bruce Fields | 20 | 1.98% | 2 | 5.13% |
| Andrew Morton | 8 | 0.79% | 1 | 2.56% |
| Dave Jones | 3 | 0.30% | 1 | 2.56% |
| Jeff Layton | 3 | 0.30% | 1 | 2.56% |
| Fabian Frederick | 2 | 0.20% | 1 | 2.56% |
| Hideaki Yoshifuji / 吉藤英明 | 1 | 0.10% | 1 | 2.56% |
| Adrian Bunk | 1 | 0.10% | 1 | 2.56% |
| Thomas Gleixner | 1 | 0.10% | 1 | 2.56% |
| Total | 1012 | 39 |
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// SPDX-License-Identifier: GPL-2.0-only /* * linux/net/sunrpc/svcauth.c * * The generic interface for RPC authentication on the server side. * * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> * * CHANGES * 19-Apr-2000 Chris Evans - Security fix */ #include <linux/types.h> #include <linux/module.h> #include <linux/sunrpc/types.h> #include <linux/sunrpc/xdr.h> #include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/svcauth.h> #include <linux/err.h> #include <linux/hash.h> #include <linux/user_namespace.h> #include <trace/events/sunrpc.h> #include "sunrpc.h" #define RPCDBG_FACILITY RPCDBG_AUTH /* * Table of authenticators */ extern struct auth_ops svcauth_null; extern struct auth_ops svcauth_unix; extern struct auth_ops svcauth_tls; static struct auth_ops __rcu *authtab[RPC_AUTH_MAXFLAVOR] = { [RPC_AUTH_NULL] = (struct auth_ops __force __rcu *)&svcauth_null, [RPC_AUTH_UNIX] = (struct auth_ops __force __rcu *)&svcauth_unix, [RPC_AUTH_TLS] = (struct auth_ops __force __rcu *)&svcauth_tls, }; static struct auth_ops * svc_get_auth_ops(rpc_authflavor_t flavor) { struct auth_ops *aops; if (flavor >= RPC_AUTH_MAXFLAVOR) return NULL; rcu_read_lock(); aops = rcu_dereference(authtab[flavor]); if (aops != NULL && !try_module_get(aops->owner)) aops = NULL; rcu_read_unlock(); return aops; } static void svc_put_auth_ops(struct auth_ops *aops) { module_put(aops->owner); } /** * svc_authenticate - Initialize an outgoing credential * @rqstp: RPC execution context * * Return values: * %SVC_OK: XDR encoding of the result can begin * %SVC_DENIED: Credential or verifier is not valid * %SVC_GARBAGE: Failed to decode credential or verifier * %SVC_COMPLETE: GSS context lifetime event; no further action * %SVC_DROP: Drop this request; no further action * %SVC_CLOSE: Like drop, but also close transport connection */ enum svc_auth_status svc_authenticate(struct svc_rqst *rqstp) { struct auth_ops *aops; u32 flavor; rqstp->rq_auth_stat = rpc_auth_ok; /* * Decode the Call credential's flavor field. The credential's * body field is decoded in the chosen ->accept method below. */ if (xdr_stream_decode_u32(&rqstp->rq_arg_stream, &flavor) < 0) return SVC_GARBAGE; aops = svc_get_auth_ops(flavor); if (aops == NULL) { rqstp->rq_auth_stat = rpc_autherr_badcred; return SVC_DENIED; } rqstp->rq_auth_slack = 0; init_svc_cred(&rqstp->rq_cred); rqstp->rq_authop = aops; return aops->accept(rqstp); } /** * svc_set_client - Assign an appropriate 'auth_domain' as the client * @rqstp: RPC execution context * * Return values: * %SVC_OK: Client was found and assigned * %SVC_DENY: Client was explicitly denied * %SVC_DROP: Ignore this request * %SVC_CLOSE: Ignore this request and close the connection */ enum svc_auth_status svc_set_client(struct svc_rqst *rqstp) { rqstp->rq_client = NULL; return rqstp->rq_authop->set_client(rqstp); } EXPORT_SYMBOL_GPL(svc_set_client); /** * svc_authorise - Finalize credentials/verifier and release resources * @rqstp: RPC execution context * * Returns zero on success, or a negative errno. */ int svc_authorise(struct svc_rqst *rqstp) { struct auth_ops *aops = rqstp->rq_authop; int rv = 0; rqstp->rq_authop = NULL; if (aops) { rv = aops->release(rqstp); svc_put_auth_ops(aops); } return rv; } int svc_auth_register(rpc_authflavor_t flavor, struct auth_ops *aops) { struct auth_ops *old; int rv = -EINVAL; if (flavor < RPC_AUTH_MAXFLAVOR) { old = cmpxchg((struct auth_ops ** __force)&authtab[flavor], NULL, aops); if (old == NULL || old == aops) rv = 0; } return rv; } EXPORT_SYMBOL_GPL(svc_auth_register); void svc_auth_unregister(rpc_authflavor_t flavor) { if (flavor < RPC_AUTH_MAXFLAVOR) rcu_assign_pointer(authtab[flavor], NULL); } EXPORT_SYMBOL_GPL(svc_auth_unregister); /** * svc_auth_flavor - return RPC transaction's RPC_AUTH flavor * @rqstp: RPC transaction context * * Returns an RPC flavor or GSS pseudoflavor. */ rpc_authflavor_t svc_auth_flavor(struct svc_rqst *rqstp) { struct auth_ops *aops = rqstp->rq_authop; if (!aops->pseudoflavor) return aops->flavour; return aops->pseudoflavor(rqstp); } EXPORT_SYMBOL_GPL(svc_auth_flavor); /** * svcauth_map_clnt_to_svc_cred_local - maps a generic cred * to a svc_cred suitable for use in nfsd. * @clnt: rpc_clnt associated with nfs client * @cred: generic cred associated with nfs client * @svc: returned svc_cred that is suitable for use in nfsd */ void svcauth_map_clnt_to_svc_cred_local(struct rpc_clnt *clnt, const struct cred *cred, struct svc_cred *svc) { struct user_namespace *userns = clnt->cl_cred ? clnt->cl_cred->user_ns : &init_user_ns; memset(svc, 0, sizeof(struct svc_cred)); svc->cr_uid = KUIDT_INIT(from_kuid_munged(userns, cred->fsuid)); svc->cr_gid = KGIDT_INIT(from_kgid_munged(userns, cred->fsgid)); svc->cr_flavor = clnt->cl_auth->au_flavor; if (cred->group_info) svc->cr_group_info = get_group_info(cred->group_info); /* These aren't relevant for local (network is bypassed) */ svc->cr_principal = NULL; svc->cr_gss_mech = NULL; } EXPORT_SYMBOL_GPL(svcauth_map_clnt_to_svc_cred_local); /************************************************** * 'auth_domains' are stored in a hash table indexed by name. * When the last reference to an 'auth_domain' is dropped, * the object is unhashed and freed. * If auth_domain_lookup fails to find an entry, it will return * it's second argument 'new'. If this is non-null, it will * have been atomically linked into the table. */ #define DN_HASHBITS 6 #define DN_HASHMAX (1<<DN_HASHBITS) static struct hlist_head auth_domain_table[DN_HASHMAX]; static DEFINE_SPINLOCK(auth_domain_lock); static void auth_domain_release(struct kref *kref) __releases(&auth_domain_lock) { struct auth_domain *dom = container_of(kref, struct auth_domain, ref); hlist_del_rcu(&dom->hash); dom->flavour->domain_release(dom); spin_unlock(&auth_domain_lock); } void auth_domain_put(struct auth_domain *dom) { kref_put_lock(&dom->ref, auth_domain_release, &auth_domain_lock); } EXPORT_SYMBOL_GPL(auth_domain_put); struct auth_domain * auth_domain_lookup(char *name, struct auth_domain *new) { struct auth_domain *hp; struct hlist_head *head; head = &auth_domain_table[hash_str(name, DN_HASHBITS)]; spin_lock(&auth_domain_lock); hlist_for_each_entry(hp, head, hash) { if (strcmp(hp->name, name)==0) { kref_get(&hp->ref); spin_unlock(&auth_domain_lock); return hp; } } if (new) hlist_add_head_rcu(&new->hash, head); spin_unlock(&auth_domain_lock); return new; } EXPORT_SYMBOL_GPL(auth_domain_lookup); struct auth_domain *auth_domain_find(char *name) { struct auth_domain *hp; struct hlist_head *head; head = &auth_domain_table[hash_str(name, DN_HASHBITS)]; rcu_read_lock(); hlist_for_each_entry_rcu(hp, head, hash) { if (strcmp(hp->name, name)==0) { if (!kref_get_unless_zero(&hp->ref)) hp = NULL; rcu_read_unlock(); return hp; } } rcu_read_unlock(); return NULL; } EXPORT_SYMBOL_GPL(auth_domain_find); /** * auth_domain_cleanup - check that the auth_domain table is empty * * On module unload the auth_domain_table must be empty. To make it * easier to catch bugs which don't clean up domains properly, we * warn if anything remains in the table at cleanup time. * * Note that we cannot proactively remove the domains at this stage. * The ->release() function might be in a module that has already been * unloaded. */ void auth_domain_cleanup(void) { int h; struct auth_domain *hp; for (h = 0; h < DN_HASHMAX; h++) hlist_for_each_entry(hp, &auth_domain_table[h], hash) pr_warn("svc: domain %s still present at module unload.\n", hp->name); }