Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/net/sunrpc/auth.c |
| 3 | * |
| 4 | * Generic RPC client authentication API. |
| 5 | * |
| 6 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/errno.h> |
Trond Myklebust | 25337fd | 2008-03-12 14:40:14 -0400 | [diff] [blame] | 14 | #include <linux/hash.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/sunrpc/clnt.h> |
| 16 | #include <linux/spinlock.h> |
| 17 | |
| 18 | #ifdef RPC_DEBUG |
| 19 | # define RPCDBG_FACILITY RPCDBG_AUTH |
| 20 | #endif |
| 21 | |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 22 | static DEFINE_SPINLOCK(rpc_authflavor_lock); |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 23 | static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | &authnull_ops, /* AUTH_NULL */ |
| 25 | &authunix_ops, /* AUTH_UNIX */ |
| 26 | NULL, /* others can be loadable modules */ |
| 27 | }; |
| 28 | |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 29 | static LIST_HEAD(cred_unused); |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 30 | static unsigned long number_cred_unused; |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | static u32 |
| 33 | pseudoflavor_to_flavor(u32 flavor) { |
| 34 | if (flavor >= RPC_AUTH_MAXFLAVOR) |
| 35 | return RPC_AUTH_GSS; |
| 36 | return flavor; |
| 37 | } |
| 38 | |
| 39 | int |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 40 | rpcauth_register(const struct rpc_authops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | { |
| 42 | rpc_authflavor_t flavor; |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 43 | int ret = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR) |
| 46 | return -EINVAL; |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 47 | spin_lock(&rpc_authflavor_lock); |
| 48 | if (auth_flavors[flavor] == NULL) { |
| 49 | auth_flavors[flavor] = ops; |
| 50 | ret = 0; |
| 51 | } |
| 52 | spin_unlock(&rpc_authflavor_lock); |
| 53 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 55 | EXPORT_SYMBOL_GPL(rpcauth_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | int |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 58 | rpcauth_unregister(const struct rpc_authops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | { |
| 60 | rpc_authflavor_t flavor; |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 61 | int ret = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR) |
| 64 | return -EINVAL; |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 65 | spin_lock(&rpc_authflavor_lock); |
| 66 | if (auth_flavors[flavor] == ops) { |
| 67 | auth_flavors[flavor] = NULL; |
| 68 | ret = 0; |
| 69 | } |
| 70 | spin_unlock(&rpc_authflavor_lock); |
| 71 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 73 | EXPORT_SYMBOL_GPL(rpcauth_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | struct rpc_auth * |
| 76 | rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt) |
| 77 | { |
| 78 | struct rpc_auth *auth; |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 79 | const struct rpc_authops *ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | u32 flavor = pseudoflavor_to_flavor(pseudoflavor); |
| 81 | |
Olaf Kirch | f344f6d | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 82 | auth = ERR_PTR(-EINVAL); |
| 83 | if (flavor >= RPC_AUTH_MAXFLAVOR) |
| 84 | goto out; |
| 85 | |
Olaf Kirch | f344f6d | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 86 | if ((ops = auth_flavors[flavor]) == NULL) |
| 87 | request_module("rpc-auth-%u", flavor); |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 88 | spin_lock(&rpc_authflavor_lock); |
| 89 | ops = auth_flavors[flavor]; |
| 90 | if (ops == NULL || !try_module_get(ops->owner)) { |
| 91 | spin_unlock(&rpc_authflavor_lock); |
Olaf Kirch | f344f6d | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 92 | goto out; |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 93 | } |
| 94 | spin_unlock(&rpc_authflavor_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | auth = ops->create(clnt, pseudoflavor); |
Trond Myklebust | fc1b356 | 2007-06-09 16:15:46 -0400 | [diff] [blame] | 96 | module_put(ops->owner); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 97 | if (IS_ERR(auth)) |
| 98 | return auth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | if (clnt->cl_auth) |
Trond Myklebust | de7a8ce | 2007-06-23 10:46:47 -0400 | [diff] [blame] | 100 | rpcauth_release(clnt->cl_auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | clnt->cl_auth = auth; |
Olaf Kirch | f344f6d | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 102 | |
| 103 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | return auth; |
| 105 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 106 | EXPORT_SYMBOL_GPL(rpcauth_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | void |
Trond Myklebust | de7a8ce | 2007-06-23 10:46:47 -0400 | [diff] [blame] | 109 | rpcauth_release(struct rpc_auth *auth) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
| 111 | if (!atomic_dec_and_test(&auth->au_count)) |
| 112 | return; |
| 113 | auth->au_ops->destroy(auth); |
| 114 | } |
| 115 | |
| 116 | static DEFINE_SPINLOCK(rpc_credcache_lock); |
| 117 | |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 118 | static void |
| 119 | rpcauth_unhash_cred_locked(struct rpc_cred *cred) |
| 120 | { |
| 121 | hlist_del_rcu(&cred->cr_hash); |
| 122 | smp_mb__before_clear_bit(); |
| 123 | clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); |
| 124 | } |
| 125 | |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 126 | static int |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 127 | rpcauth_unhash_cred(struct rpc_cred *cred) |
| 128 | { |
| 129 | spinlock_t *cache_lock; |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 130 | int ret; |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 131 | |
| 132 | cache_lock = &cred->cr_auth->au_credcache->lock; |
| 133 | spin_lock(cache_lock); |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 134 | ret = atomic_read(&cred->cr_count) == 0; |
| 135 | if (ret) |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 136 | rpcauth_unhash_cred_locked(cred); |
| 137 | spin_unlock(cache_lock); |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 138 | return ret; |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 139 | } |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /* |
| 142 | * Initialize RPC credential cache |
| 143 | */ |
| 144 | int |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 145 | rpcauth_init_credcache(struct rpc_auth *auth) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
| 147 | struct rpc_cred_cache *new; |
Trond Myklebust | 988664a | 2010-07-31 14:29:07 -0400 | [diff] [blame^] | 148 | unsigned int hashsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | int i; |
| 150 | |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 151 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (!new) |
| 153 | return -ENOMEM; |
Trond Myklebust | 988664a | 2010-07-31 14:29:07 -0400 | [diff] [blame^] | 154 | new->hashbits = RPC_CREDCACHE_HASHBITS; |
| 155 | hashsize = 1U << new->hashbits; |
| 156 | for (i = 0; i < hashsize; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | INIT_HLIST_HEAD(&new->hashtable[i]); |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 158 | spin_lock_init(&new->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | auth->au_credcache = new; |
| 160 | return 0; |
| 161 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 162 | EXPORT_SYMBOL_GPL(rpcauth_init_credcache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | /* |
| 165 | * Destroy a list of credentials |
| 166 | */ |
| 167 | static inline |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 168 | void rpcauth_destroy_credlist(struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | { |
| 170 | struct rpc_cred *cred; |
| 171 | |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 172 | while (!list_empty(head)) { |
| 173 | cred = list_entry(head->next, struct rpc_cred, cr_lru); |
| 174 | list_del_init(&cred->cr_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | put_rpccred(cred); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * Clear the RPC credential cache, and delete those credentials |
| 181 | * that are not referenced. |
| 182 | */ |
| 183 | void |
Trond Myklebust | 3ab9bb7 | 2007-06-09 15:41:42 -0400 | [diff] [blame] | 184 | rpcauth_clear_credcache(struct rpc_cred_cache *cache) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 186 | LIST_HEAD(free); |
| 187 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | struct rpc_cred *cred; |
Trond Myklebust | 988664a | 2010-07-31 14:29:07 -0400 | [diff] [blame^] | 189 | unsigned int hashsize = 1U << cache->hashbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | int i; |
| 191 | |
| 192 | spin_lock(&rpc_credcache_lock); |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 193 | spin_lock(&cache->lock); |
Trond Myklebust | 988664a | 2010-07-31 14:29:07 -0400 | [diff] [blame^] | 194 | for (i = 0; i < hashsize; i++) { |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 195 | head = &cache->hashtable[i]; |
| 196 | while (!hlist_empty(head)) { |
| 197 | cred = hlist_entry(head->first, struct rpc_cred, cr_hash); |
| 198 | get_rpccred(cred); |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 199 | if (!list_empty(&cred->cr_lru)) { |
| 200 | list_del(&cred->cr_lru); |
| 201 | number_cred_unused--; |
| 202 | } |
| 203 | list_add_tail(&cred->cr_lru, &free); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 204 | rpcauth_unhash_cred_locked(cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | } |
| 206 | } |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 207 | spin_unlock(&cache->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | spin_unlock(&rpc_credcache_lock); |
| 209 | rpcauth_destroy_credlist(&free); |
| 210 | } |
| 211 | |
Trond Myklebust | 3ab9bb7 | 2007-06-09 15:41:42 -0400 | [diff] [blame] | 212 | /* |
| 213 | * Destroy the RPC credential cache |
| 214 | */ |
| 215 | void |
| 216 | rpcauth_destroy_credcache(struct rpc_auth *auth) |
| 217 | { |
| 218 | struct rpc_cred_cache *cache = auth->au_credcache; |
| 219 | |
| 220 | if (cache) { |
| 221 | auth->au_credcache = NULL; |
| 222 | rpcauth_clear_credcache(cache); |
| 223 | kfree(cache); |
| 224 | } |
| 225 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 226 | EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache); |
Trond Myklebust | 3ab9bb7 | 2007-06-09 15:41:42 -0400 | [diff] [blame] | 227 | |
Trond Myklebust | d2b8314 | 2008-04-14 18:13:37 -0400 | [diff] [blame] | 228 | |
| 229 | #define RPC_AUTH_EXPIRY_MORATORIUM (60 * HZ) |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | /* |
| 232 | * Remove stale credentials. Avoid sleeping inside the loop. |
| 233 | */ |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 234 | static int |
| 235 | rpcauth_prune_expired(struct list_head *free, int nr_to_scan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 237 | spinlock_t *cache_lock; |
Trond Myklebust | eac0d18 | 2008-10-28 15:21:41 -0400 | [diff] [blame] | 238 | struct rpc_cred *cred, *next; |
Trond Myklebust | d2b8314 | 2008-04-14 18:13:37 -0400 | [diff] [blame] | 239 | unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Trond Myklebust | eac0d18 | 2008-10-28 15:21:41 -0400 | [diff] [blame] | 241 | list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) { |
| 242 | |
Trond Myklebust | 2067340 | 2010-05-13 12:51:06 -0400 | [diff] [blame] | 243 | if (nr_to_scan-- == 0) |
| 244 | break; |
Trond Myklebust | 93a05e6 | 2010-05-13 12:51:06 -0400 | [diff] [blame] | 245 | /* |
| 246 | * Enforce a 60 second garbage collection moratorium |
| 247 | * Note that the cred_unused list must be time-ordered. |
| 248 | */ |
Trond Myklebust | 3d7b089 | 2010-04-22 15:35:55 -0400 | [diff] [blame] | 249 | if (time_in_range(cred->cr_expire, expired, jiffies) && |
Trond Myklebust | eac0d18 | 2008-10-28 15:21:41 -0400 | [diff] [blame] | 250 | test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) |
Trond Myklebust | 93a05e6 | 2010-05-13 12:51:06 -0400 | [diff] [blame] | 251 | return 0; |
Trond Myklebust | eac0d18 | 2008-10-28 15:21:41 -0400 | [diff] [blame] | 252 | |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 253 | list_del_init(&cred->cr_lru); |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 254 | number_cred_unused--; |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 255 | if (atomic_read(&cred->cr_count) != 0) |
| 256 | continue; |
Trond Myklebust | eac0d18 | 2008-10-28 15:21:41 -0400 | [diff] [blame] | 257 | |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 258 | cache_lock = &cred->cr_auth->au_credcache->lock; |
| 259 | spin_lock(cache_lock); |
| 260 | if (atomic_read(&cred->cr_count) == 0) { |
| 261 | get_rpccred(cred); |
| 262 | list_add_tail(&cred->cr_lru, free); |
| 263 | rpcauth_unhash_cred_locked(cred); |
| 264 | } |
| 265 | spin_unlock(cache_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
Trond Myklebust | 93a05e6 | 2010-05-13 12:51:06 -0400 | [diff] [blame] | 267 | return (number_cred_unused / 100) * sysctl_vfs_cache_pressure; |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | /* |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 271 | * Run memory cache shrinker. |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 272 | */ |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 273 | static int |
| 274 | rpcauth_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 275 | { |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 276 | LIST_HEAD(free); |
| 277 | int res; |
| 278 | |
Trond Myklebust | d300a41 | 2010-05-13 12:51:03 -0400 | [diff] [blame] | 279 | if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL) |
| 280 | return (nr_to_scan == 0) ? 0 : -1; |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 281 | if (list_empty(&cred_unused)) |
| 282 | return 0; |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 283 | spin_lock(&rpc_credcache_lock); |
Trond Myklebust | 93a05e6 | 2010-05-13 12:51:06 -0400 | [diff] [blame] | 284 | res = rpcauth_prune_expired(&free, nr_to_scan); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 285 | spin_unlock(&rpc_credcache_lock); |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 286 | rpcauth_destroy_credlist(&free); |
| 287 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Look up a process' credentials in the authentication cache |
| 292 | */ |
| 293 | struct rpc_cred * |
| 294 | rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 295 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | { |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 297 | LIST_HEAD(free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | struct rpc_cred_cache *cache = auth->au_credcache; |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 299 | struct hlist_node *pos; |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 300 | struct rpc_cred *cred = NULL, |
| 301 | *entry, *new; |
Trond Myklebust | 25337fd | 2008-03-12 14:40:14 -0400 | [diff] [blame] | 302 | unsigned int nr; |
| 303 | |
Trond Myklebust | 988664a | 2010-07-31 14:29:07 -0400 | [diff] [blame^] | 304 | nr = hash_long(acred->uid, cache->hashbits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 306 | rcu_read_lock(); |
| 307 | hlist_for_each_entry_rcu(entry, pos, &cache->hashtable[nr], cr_hash) { |
| 308 | if (!entry->cr_ops->crmatch(acred, entry, flags)) |
| 309 | continue; |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 310 | spin_lock(&cache->lock); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 311 | if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) { |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 312 | spin_unlock(&cache->lock); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 313 | continue; |
| 314 | } |
| 315 | cred = get_rpccred(entry); |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 316 | spin_unlock(&cache->lock); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 317 | break; |
| 318 | } |
| 319 | rcu_read_unlock(); |
| 320 | |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 321 | if (cred != NULL) |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 322 | goto found; |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 323 | |
| 324 | new = auth->au_ops->crcreate(auth, acred, flags); |
| 325 | if (IS_ERR(new)) { |
| 326 | cred = new; |
| 327 | goto out; |
| 328 | } |
| 329 | |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 330 | spin_lock(&cache->lock); |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 331 | hlist_for_each_entry(entry, pos, &cache->hashtable[nr], cr_hash) { |
| 332 | if (!entry->cr_ops->crmatch(acred, entry, flags)) |
| 333 | continue; |
| 334 | cred = get_rpccred(entry); |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 335 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 337 | if (cred == NULL) { |
Trond Myklebust | 5fe4755 | 2007-06-23 19:55:31 -0400 | [diff] [blame] | 338 | cred = new; |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 339 | set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); |
| 340 | hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]); |
| 341 | } else |
| 342 | list_add_tail(&new->cr_lru, &free); |
Trond Myklebust | 9499b43 | 2007-06-24 15:57:57 -0400 | [diff] [blame] | 343 | spin_unlock(&cache->lock); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 344 | found: |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 345 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && |
| 346 | cred->cr_ops->cr_init != NULL && |
| 347 | !(flags & RPCAUTH_LOOKUP_NEW)) { |
Trond Myklebust | fba3bad | 2006-02-01 12:19:27 -0500 | [diff] [blame] | 348 | int res = cred->cr_ops->cr_init(auth, cred); |
| 349 | if (res < 0) { |
| 350 | put_rpccred(cred); |
| 351 | cred = ERR_PTR(res); |
| 352 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 354 | rpcauth_destroy_credlist(&free); |
| 355 | out: |
| 356 | return cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 358 | EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | struct rpc_cred * |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 361 | rpcauth_lookupcred(struct rpc_auth *auth, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | { |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 363 | struct auth_cred acred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | struct rpc_cred *ret; |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 365 | const struct cred *cred = current_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 367 | dprintk("RPC: looking up %s cred\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | auth->au_ops->au_name); |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 369 | |
| 370 | memset(&acred, 0, sizeof(acred)); |
| 371 | acred.uid = cred->fsuid; |
| 372 | acred.gid = cred->fsgid; |
| 373 | acred.group_info = get_group_info(((struct cred *)cred)->group_info); |
| 374 | |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 375 | ret = auth->au_ops->lookup_cred(auth, &acred, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | put_group_info(acred.group_info); |
| 377 | return ret; |
| 378 | } |
| 379 | |
Trond Myklebust | 5fe4755 | 2007-06-23 19:55:31 -0400 | [diff] [blame] | 380 | void |
| 381 | rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred, |
| 382 | struct rpc_auth *auth, const struct rpc_credops *ops) |
| 383 | { |
| 384 | INIT_HLIST_NODE(&cred->cr_hash); |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 385 | INIT_LIST_HEAD(&cred->cr_lru); |
Trond Myklebust | 5fe4755 | 2007-06-23 19:55:31 -0400 | [diff] [blame] | 386 | atomic_set(&cred->cr_count, 1); |
| 387 | cred->cr_auth = auth; |
| 388 | cred->cr_ops = ops; |
| 389 | cred->cr_expire = jiffies; |
| 390 | #ifdef RPC_DEBUG |
| 391 | cred->cr_magic = RPCAUTH_CRED_MAGIC; |
| 392 | #endif |
| 393 | cred->cr_uid = acred->uid; |
| 394 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 395 | EXPORT_SYMBOL_GPL(rpcauth_init_cred); |
Trond Myklebust | 5fe4755 | 2007-06-23 19:55:31 -0400 | [diff] [blame] | 396 | |
Trond Myklebust | 5c69104 | 2008-03-12 16:21:07 -0400 | [diff] [blame] | 397 | void |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 398 | rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags) |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 399 | { |
| 400 | task->tk_msg.rpc_cred = get_rpccred(cred); |
| 401 | dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid, |
| 402 | cred->cr_auth->au_ops->au_name, cred); |
| 403 | } |
Trond Myklebust | 5c69104 | 2008-03-12 16:21:07 -0400 | [diff] [blame] | 404 | EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred); |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 405 | |
| 406 | static void |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 407 | rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | { |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 409 | struct rpc_auth *auth = task->tk_client->cl_auth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | struct auth_cred acred = { |
Trond Myklebust | af09383 | 2008-03-12 12:12:16 -0400 | [diff] [blame] | 411 | .uid = 0, |
| 412 | .gid = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | }; |
| 414 | struct rpc_cred *ret; |
| 415 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 416 | dprintk("RPC: %5u looking up %s cred\n", |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 417 | task->tk_pid, task->tk_client->cl_auth->au_ops->au_name); |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 418 | ret = auth->au_ops->lookup_cred(auth, &acred, lookupflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | if (!IS_ERR(ret)) |
| 420 | task->tk_msg.rpc_cred = ret; |
| 421 | else |
| 422 | task->tk_status = PTR_ERR(ret); |
Trond Myklebust | af09383 | 2008-03-12 12:12:16 -0400 | [diff] [blame] | 423 | } |
| 424 | |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 425 | static void |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 426 | rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags) |
Trond Myklebust | af09383 | 2008-03-12 12:12:16 -0400 | [diff] [blame] | 427 | { |
| 428 | struct rpc_auth *auth = task->tk_client->cl_auth; |
| 429 | struct rpc_cred *ret; |
| 430 | |
| 431 | dprintk("RPC: %5u looking up %s cred\n", |
| 432 | task->tk_pid, auth->au_ops->au_name); |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 433 | ret = rpcauth_lookupcred(auth, lookupflags); |
Trond Myklebust | af09383 | 2008-03-12 12:12:16 -0400 | [diff] [blame] | 434 | if (!IS_ERR(ret)) |
| 435 | task->tk_msg.rpc_cred = ret; |
| 436 | else |
| 437 | task->tk_status = PTR_ERR(ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | void |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 441 | rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | { |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 443 | int lookupflags = 0; |
| 444 | |
| 445 | if (flags & RPC_TASK_ASYNC) |
| 446 | lookupflags |= RPCAUTH_LOOKUP_NEW; |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 447 | if (cred != NULL) |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 448 | cred->cr_ops->crbind(task, cred, lookupflags); |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 449 | else if (flags & RPC_TASK_ROOTCREDS) |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 450 | rpcauth_bind_root_cred(task, lookupflags); |
Trond Myklebust | 4ccda2c | 2008-03-12 16:20:55 -0400 | [diff] [blame] | 451 | else |
Trond Myklebust | 5d35175 | 2009-09-15 13:32:13 -0400 | [diff] [blame] | 452 | rpcauth_bind_new_cred(task, lookupflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | void |
| 456 | put_rpccred(struct rpc_cred *cred) |
| 457 | { |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 458 | /* Fast path for unhashed credentials */ |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 459 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) == 0) { |
| 460 | if (atomic_dec_and_test(&cred->cr_count)) |
| 461 | cred->cr_ops->crdestroy(cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | return; |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 463 | } |
| 464 | |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 465 | if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock)) |
| 466 | return; |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 467 | if (!list_empty(&cred->cr_lru)) { |
| 468 | number_cred_unused--; |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 469 | list_del_init(&cred->cr_lru); |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 470 | } |
Trond Myklebust | 5f707eb | 2008-10-28 15:21:42 -0400 | [diff] [blame] | 471 | if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) { |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 472 | if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) { |
| 473 | cred->cr_expire = jiffies; |
| 474 | list_add_tail(&cred->cr_lru, &cred_unused); |
| 475 | number_cred_unused++; |
| 476 | goto out_nodestroy; |
| 477 | } |
| 478 | if (!rpcauth_unhash_cred(cred)) { |
| 479 | /* We were hashed and someone looked us up... */ |
| 480 | goto out_nodestroy; |
| 481 | } |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 482 | } |
| 483 | spin_unlock(&rpc_credcache_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | cred->cr_ops->crdestroy(cred); |
Trond Myklebust | f0380f3 | 2009-12-03 08:10:17 -0500 | [diff] [blame] | 485 | return; |
| 486 | out_nodestroy: |
| 487 | spin_unlock(&rpc_credcache_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | } |
Trond Myklebust | e8914c6 | 2007-07-14 15:39:59 -0400 | [diff] [blame] | 489 | EXPORT_SYMBOL_GPL(put_rpccred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | void |
| 492 | rpcauth_unbindcred(struct rpc_task *task) |
| 493 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 495 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 496 | dprintk("RPC: %5u releasing %s cred %p\n", |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 497 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
| 499 | put_rpccred(cred); |
| 500 | task->tk_msg.rpc_cred = NULL; |
| 501 | } |
| 502 | |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 503 | __be32 * |
| 504 | rpcauth_marshcred(struct rpc_task *task, __be32 *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 507 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 508 | dprintk("RPC: %5u marshaling %s cred %p\n", |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 509 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
Chuck Lever | 0bbacc4 | 2005-11-01 16:53:32 -0500 | [diff] [blame] | 510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | return cred->cr_ops->crmarshal(task, p); |
| 512 | } |
| 513 | |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 514 | __be32 * |
| 515 | rpcauth_checkverf(struct rpc_task *task, __be32 *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 518 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 519 | dprintk("RPC: %5u validating %s cred %p\n", |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 520 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
Chuck Lever | 0bbacc4 | 2005-11-01 16:53:32 -0500 | [diff] [blame] | 521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | return cred->cr_ops->crvalidate(task, p); |
| 523 | } |
| 524 | |
| 525 | int |
| 526 | rpcauth_wrap_req(struct rpc_task *task, kxdrproc_t encode, void *rqstp, |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 527 | __be32 *data, void *obj) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
| 529 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 530 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 531 | dprintk("RPC: %5u using %s cred %p to wrap rpc data\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | task->tk_pid, cred->cr_ops->cr_name, cred); |
| 533 | if (cred->cr_ops->crwrap_req) |
| 534 | return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj); |
| 535 | /* By default, we encode the arguments normally. */ |
Trond Myklebust | 88a9fe8 | 2008-12-23 15:21:31 -0500 | [diff] [blame] | 536 | return encode(rqstp, data, obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | int |
| 540 | rpcauth_unwrap_resp(struct rpc_task *task, kxdrproc_t decode, void *rqstp, |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 541 | __be32 *data, void *obj) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | { |
| 543 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 544 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 545 | dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | task->tk_pid, cred->cr_ops->cr_name, cred); |
| 547 | if (cred->cr_ops->crunwrap_resp) |
| 548 | return cred->cr_ops->crunwrap_resp(task, decode, rqstp, |
| 549 | data, obj); |
| 550 | /* By default, we decode the arguments normally. */ |
Trond Myklebust | 88a9fe8 | 2008-12-23 15:21:31 -0500 | [diff] [blame] | 551 | return decode(rqstp, data, obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | int |
| 555 | rpcauth_refreshcred(struct rpc_task *task) |
| 556 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 558 | int err; |
| 559 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 560 | dprintk("RPC: %5u refreshing %s cred %p\n", |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 561 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
Chuck Lever | 0bbacc4 | 2005-11-01 16:53:32 -0500 | [diff] [blame] | 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | err = cred->cr_ops->crrefresh(task); |
| 564 | if (err < 0) |
| 565 | task->tk_status = err; |
| 566 | return err; |
| 567 | } |
| 568 | |
| 569 | void |
| 570 | rpcauth_invalcred(struct rpc_task *task) |
| 571 | { |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 572 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 573 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 574 | dprintk("RPC: %5u invalidating %s cred %p\n", |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 575 | task->tk_pid, cred->cr_auth->au_ops->au_name, cred); |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 576 | if (cred) |
| 577 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | int |
| 581 | rpcauth_uptodatecred(struct rpc_task *task) |
| 582 | { |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 583 | struct rpc_cred *cred = task->tk_msg.rpc_cred; |
| 584 | |
| 585 | return cred == NULL || |
| 586 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 588 | |
Rusty Russell | 8e1f936 | 2007-07-17 04:03:17 -0700 | [diff] [blame] | 589 | static struct shrinker rpc_cred_shrinker = { |
| 590 | .shrink = rpcauth_cache_shrinker, |
| 591 | .seeks = DEFAULT_SEEKS, |
| 592 | }; |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 593 | |
Trond Myklebust | 5d8d9a4 | 2010-07-31 14:29:07 -0400 | [diff] [blame] | 594 | int __init rpcauth_init_module(void) |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 595 | { |
Trond Myklebust | 5d8d9a4 | 2010-07-31 14:29:07 -0400 | [diff] [blame] | 596 | int err; |
| 597 | |
| 598 | err = rpc_init_authunix(); |
| 599 | if (err < 0) |
| 600 | goto out1; |
| 601 | err = rpc_init_generic_auth(); |
| 602 | if (err < 0) |
| 603 | goto out2; |
Rusty Russell | 8e1f936 | 2007-07-17 04:03:17 -0700 | [diff] [blame] | 604 | register_shrinker(&rpc_cred_shrinker); |
Trond Myklebust | 5d8d9a4 | 2010-07-31 14:29:07 -0400 | [diff] [blame] | 605 | return 0; |
| 606 | out2: |
| 607 | rpc_destroy_authunix(); |
| 608 | out1: |
| 609 | return err; |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | void __exit rpcauth_remove_module(void) |
| 613 | { |
Trond Myklebust | 5d8d9a4 | 2010-07-31 14:29:07 -0400 | [diff] [blame] | 614 | rpc_destroy_authunix(); |
| 615 | rpc_destroy_generic_auth(); |
Rusty Russell | 8e1f936 | 2007-07-17 04:03:17 -0700 | [diff] [blame] | 616 | unregister_shrinker(&rpc_cred_shrinker); |
Trond Myklebust | f5c2187 | 2007-06-25 17:11:20 -0400 | [diff] [blame] | 617 | } |