Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Uwe Zeisberger | f30c226 | 2006-10-03 23:01:26 +0200 | [diff] [blame] | 2 | * linux/net/sunrpc/auth_gss/auth_gss.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * RPCSEC_GSS client authentication. |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 5 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Copyright (c) 2000 The Regents of the University of Michigan. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Dug Song <dugsong@monkey.org> |
| 10 | * Andy Adamson <andros@umich.edu> |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in the |
| 20 | * documentation and/or other materials provided with the distribution. |
| 21 | * 3. Neither the name of the University nor the names of its |
| 22 | * contributors may be used to endorse or promote products derived |
| 23 | * from this software without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | */ |
| 37 | |
| 38 | |
| 39 | #include <linux/module.h> |
| 40 | #include <linux/init.h> |
| 41 | #include <linux/types.h> |
| 42 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/sched.h> |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 44 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/sunrpc/clnt.h> |
| 46 | #include <linux/sunrpc/auth.h> |
| 47 | #include <linux/sunrpc/auth_gss.h> |
| 48 | #include <linux/sunrpc/svcauth_gss.h> |
| 49 | #include <linux/sunrpc/gss_err.h> |
| 50 | #include <linux/workqueue.h> |
| 51 | #include <linux/sunrpc/rpc_pipe_fs.h> |
| 52 | #include <linux/sunrpc/gss_api.h> |
| 53 | #include <asm/uaccess.h> |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 54 | #include <linux/hashtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Trond Myklebust | abfdbd5 | 2013-05-15 11:28:54 -0700 | [diff] [blame] | 56 | #include "../netns.h" |
| 57 | |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 58 | static const struct rpc_authops authgss_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 60 | static const struct rpc_credops gss_credops; |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 61 | static const struct rpc_credops gss_nullops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 63 | #define GSS_RETRY_EXPIRED 5 |
| 64 | static unsigned int gss_expired_cred_retry_delay = GSS_RETRY_EXPIRED; |
| 65 | |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 66 | #define GSS_KEY_EXPIRE_TIMEO 240 |
| 67 | static unsigned int gss_key_expire_timeo = GSS_KEY_EXPIRE_TIMEO; |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #ifdef RPC_DEBUG |
| 70 | # define RPCDBG_FACILITY RPCDBG_AUTH |
| 71 | #endif |
| 72 | |
Kevin Coffman | 725f286 | 2010-03-17 13:02:46 -0400 | [diff] [blame] | 73 | #define GSS_CRED_SLACK (RPC_MAX_AUTH_SIZE * 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | /* length of a krb5 verifier (48), plus data added before arguments when |
| 75 | * using integrity (two 4-byte integers): */ |
Olga Kornievskaia | adeb813 | 2006-12-04 20:22:34 -0500 | [diff] [blame] | 76 | #define GSS_VERF_SLACK 100 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Trond Myklebust | 23c323a | 2013-09-12 10:16:31 -0400 | [diff] [blame] | 78 | static DEFINE_HASHTABLE(gss_auth_hash_table, 4); |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 79 | static DEFINE_SPINLOCK(gss_auth_hash_lock); |
| 80 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 81 | struct gss_pipe { |
| 82 | struct rpc_pipe_dir_object pdo; |
| 83 | struct rpc_pipe *pipe; |
| 84 | struct rpc_clnt *clnt; |
| 85 | const char *name; |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 86 | struct kref kref; |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 87 | }; |
| 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | struct gss_auth { |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 90 | struct kref kref; |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 91 | struct hlist_node hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | struct rpc_auth rpc_auth; |
| 93 | struct gss_api_mech *mech; |
| 94 | enum rpc_gss_svc service; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | struct rpc_clnt *client; |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 96 | struct net *net; |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 97 | /* |
| 98 | * There are two upcall pipes; dentry[1], named "gssd", is used |
| 99 | * for the new text-based upcall; dentry[0] is named after the |
| 100 | * mechanism (for example, "krb5") and exists for |
| 101 | * backwards-compatibility with older gssd's. |
| 102 | */ |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 103 | struct gss_pipe *gss_pipe[2]; |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 104 | const char *target_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | }; |
| 106 | |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 107 | /* pipe_version >= 0 if and only if someone has a pipe open. */ |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 108 | static DEFINE_SPINLOCK(pipe_version_lock); |
| 109 | static struct rpc_wait_queue pipe_version_rpc_waitqueue; |
| 110 | static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); |
\"J. Bruce Fields\ | cf81939 | 2008-12-23 16:10:19 -0500 | [diff] [blame] | 111 | |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 112 | static void gss_free_ctx(struct gss_cl_ctx *); |
Trond Myklebust | b693ba4 | 2009-08-09 15:14:15 -0400 | [diff] [blame] | 113 | static const struct rpc_pipe_ops gss_upcall_ops_v0; |
| 114 | static const struct rpc_pipe_ops gss_upcall_ops_v1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | static inline struct gss_cl_ctx * |
| 117 | gss_get_ctx(struct gss_cl_ctx *ctx) |
| 118 | { |
| 119 | atomic_inc(&ctx->count); |
| 120 | return ctx; |
| 121 | } |
| 122 | |
| 123 | static inline void |
| 124 | gss_put_ctx(struct gss_cl_ctx *ctx) |
| 125 | { |
| 126 | if (atomic_dec_and_test(&ctx->count)) |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 127 | gss_free_ctx(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | } |
| 129 | |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 130 | /* gss_cred_set_ctx: |
| 131 | * called by gss_upcall_callback and gss_create_upcall in order |
| 132 | * to set the gss context. The actual exchange of an old context |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 133 | * and a new one is protected by the pipe->lock. |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 134 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | static void |
| 136 | gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) |
| 137 | { |
| 138 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 139 | |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 140 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
| 141 | return; |
Trond Myklebust | 7b6962b | 2008-04-17 16:53:01 -0400 | [diff] [blame] | 142 | gss_get_ctx(ctx); |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 143 | rcu_assign_pointer(gss_cred->gc_ctx, ctx); |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 144 | set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 145 | smp_mb__before_clear_bit(); |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 146 | clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | static const void * |
| 150 | simple_get_bytes(const void *p, const void *end, void *res, size_t len) |
| 151 | { |
| 152 | const void *q = (const void *)((const char *)p + len); |
| 153 | if (unlikely(q > end || q < p)) |
| 154 | return ERR_PTR(-EFAULT); |
| 155 | memcpy(res, p, len); |
| 156 | return q; |
| 157 | } |
| 158 | |
| 159 | static inline const void * |
| 160 | simple_get_netobj(const void *p, const void *end, struct xdr_netobj *dest) |
| 161 | { |
| 162 | const void *q; |
| 163 | unsigned int len; |
| 164 | |
| 165 | p = simple_get_bytes(p, end, &len, sizeof(len)); |
| 166 | if (IS_ERR(p)) |
| 167 | return p; |
| 168 | q = (const void *)((const char *)p + len); |
| 169 | if (unlikely(q > end || q < p)) |
| 170 | return ERR_PTR(-EFAULT); |
Trond Myklebust | 0f38b87 | 2008-06-10 18:31:01 -0400 | [diff] [blame] | 171 | dest->data = kmemdup(p, len, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | if (unlikely(dest->data == NULL)) |
| 173 | return ERR_PTR(-ENOMEM); |
| 174 | dest->len = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | return q; |
| 176 | } |
| 177 | |
| 178 | static struct gss_cl_ctx * |
| 179 | gss_cred_get_ctx(struct rpc_cred *cred) |
| 180 | { |
| 181 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
| 182 | struct gss_cl_ctx *ctx = NULL; |
| 183 | |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 184 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | if (gss_cred->gc_ctx) |
| 186 | ctx = gss_get_ctx(gss_cred->gc_ctx); |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 187 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return ctx; |
| 189 | } |
| 190 | |
| 191 | static struct gss_cl_ctx * |
| 192 | gss_alloc_context(void) |
| 193 | { |
| 194 | struct gss_cl_ctx *ctx; |
| 195 | |
Trond Myklebust | 0f38b87 | 2008-06-10 18:31:01 -0400 | [diff] [blame] | 196 | ctx = kzalloc(sizeof(*ctx), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | if (ctx != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | ctx->gc_proc = RPC_GSS_PROC_DATA; |
| 199 | ctx->gc_seq = 1; /* NetApp 6.4R1 doesn't accept seq. no. 0 */ |
| 200 | spin_lock_init(&ctx->gc_seq_lock); |
| 201 | atomic_set(&ctx->count,1); |
| 202 | } |
| 203 | return ctx; |
| 204 | } |
| 205 | |
| 206 | #define GSSD_MIN_TIMEOUT (60 * 60) |
| 207 | static const void * |
| 208 | gss_fill_context(const void *p, const void *end, struct gss_cl_ctx *ctx, struct gss_api_mech *gm) |
| 209 | { |
| 210 | const void *q; |
| 211 | unsigned int seclen; |
| 212 | unsigned int timeout; |
Andy Adamson | 620038f | 2012-11-27 10:34:20 -0500 | [diff] [blame] | 213 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | u32 window_size; |
| 215 | int ret; |
| 216 | |
Andy Adamson | 620038f | 2012-11-27 10:34:20 -0500 | [diff] [blame] | 217 | /* First unsigned int gives the remaining lifetime in seconds of the |
| 218 | * credential - e.g. the remaining TGT lifetime for Kerberos or |
| 219 | * the -t value passed to GSSD. |
| 220 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | p = simple_get_bytes(p, end, &timeout, sizeof(timeout)); |
| 222 | if (IS_ERR(p)) |
| 223 | goto err; |
| 224 | if (timeout == 0) |
| 225 | timeout = GSSD_MIN_TIMEOUT; |
Andy Adamson | 620038f | 2012-11-27 10:34:20 -0500 | [diff] [blame] | 226 | ctx->gc_expiry = now + ((unsigned long)timeout * HZ); |
| 227 | /* Sequence number window. Determines the maximum number of |
| 228 | * simultaneous requests |
| 229 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | p = simple_get_bytes(p, end, &window_size, sizeof(window_size)); |
| 231 | if (IS_ERR(p)) |
| 232 | goto err; |
| 233 | ctx->gc_win = window_size; |
| 234 | /* gssd signals an error by passing ctx->gc_win = 0: */ |
| 235 | if (ctx->gc_win == 0) { |
Jeff Layton | dc5ddce | 2010-01-07 09:42:02 -0500 | [diff] [blame] | 236 | /* |
| 237 | * in which case, p points to an error code. Anything other |
| 238 | * than -EKEYEXPIRED gets converted to -EACCES. |
| 239 | */ |
| 240 | p = simple_get_bytes(p, end, &ret, sizeof(ret)); |
| 241 | if (!IS_ERR(p)) |
| 242 | p = (ret == -EKEYEXPIRED) ? ERR_PTR(-EKEYEXPIRED) : |
| 243 | ERR_PTR(-EACCES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | goto err; |
| 245 | } |
| 246 | /* copy the opaque wire context */ |
| 247 | p = simple_get_netobj(p, end, &ctx->gc_wire_ctx); |
| 248 | if (IS_ERR(p)) |
| 249 | goto err; |
| 250 | /* import the opaque security context */ |
| 251 | p = simple_get_bytes(p, end, &seclen, sizeof(seclen)); |
| 252 | if (IS_ERR(p)) |
| 253 | goto err; |
| 254 | q = (const void *)((const char *)p + seclen); |
| 255 | if (unlikely(q > end || q < p)) { |
| 256 | p = ERR_PTR(-EFAULT); |
| 257 | goto err; |
| 258 | } |
Simo Sorce | 400f26b | 2012-05-25 18:09:53 -0400 | [diff] [blame] | 259 | ret = gss_import_sec_context(p, seclen, gm, &ctx->gc_gss_ctx, NULL, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | if (ret < 0) { |
| 261 | p = ERR_PTR(ret); |
| 262 | goto err; |
| 263 | } |
Andy Adamson | 620038f | 2012-11-27 10:34:20 -0500 | [diff] [blame] | 264 | dprintk("RPC: %s Success. gc_expiry %lu now %lu timeout %u\n", |
| 265 | __func__, ctx->gc_expiry, now, timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | return q; |
| 267 | err: |
Jeff Layton | 173db30 | 2013-02-07 10:29:06 -0500 | [diff] [blame] | 268 | dprintk("RPC: %s returns error %ld\n", __func__, -PTR_ERR(p)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return p; |
| 270 | } |
| 271 | |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 272 | #define UPCALL_BUF_LEN 128 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | struct gss_upcall_msg { |
| 275 | atomic_t count; |
Eric W. Biederman | 7eaf040 | 2013-02-01 16:31:17 -0800 | [diff] [blame] | 276 | kuid_t uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | struct rpc_pipe_msg msg; |
| 278 | struct list_head list; |
| 279 | struct gss_auth *auth; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 280 | struct rpc_pipe *pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | struct rpc_wait_queue rpc_waitqueue; |
| 282 | wait_queue_head_t waitqueue; |
| 283 | struct gss_cl_ctx *ctx; |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 284 | char databuf[UPCALL_BUF_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | }; |
| 286 | |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 287 | static int get_pipe_version(struct net *net) |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 288 | { |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 289 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 290 | int ret; |
| 291 | |
| 292 | spin_lock(&pipe_version_lock); |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 293 | if (sn->pipe_version >= 0) { |
| 294 | atomic_inc(&sn->pipe_users); |
| 295 | ret = sn->pipe_version; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 296 | } else |
| 297 | ret = -EAGAIN; |
| 298 | spin_unlock(&pipe_version_lock); |
| 299 | return ret; |
| 300 | } |
| 301 | |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 302 | static void put_pipe_version(struct net *net) |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 303 | { |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 304 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
| 305 | |
| 306 | if (atomic_dec_and_lock(&sn->pipe_users, &pipe_version_lock)) { |
| 307 | sn->pipe_version = -1; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 308 | spin_unlock(&pipe_version_lock); |
| 309 | } |
| 310 | } |
| 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | static void |
| 313 | gss_release_msg(struct gss_upcall_msg *gss_msg) |
| 314 | { |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 315 | struct net *net = gss_msg->auth->net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (!atomic_dec_and_test(&gss_msg->count)) |
| 317 | return; |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 318 | put_pipe_version(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | BUG_ON(!list_empty(&gss_msg->list)); |
| 320 | if (gss_msg->ctx != NULL) |
| 321 | gss_put_ctx(gss_msg->ctx); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 322 | rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | kfree(gss_msg); |
| 324 | } |
| 325 | |
| 326 | static struct gss_upcall_msg * |
Eric W. Biederman | 7eaf040 | 2013-02-01 16:31:17 -0800 | [diff] [blame] | 327 | __gss_find_upcall(struct rpc_pipe *pipe, kuid_t uid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
| 329 | struct gss_upcall_msg *pos; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 330 | list_for_each_entry(pos, &pipe->in_downcall, list) { |
Eric W. Biederman | 0b4d51b | 2013-02-01 16:39:32 -0800 | [diff] [blame] | 331 | if (!uid_eq(pos->uid, uid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | continue; |
| 333 | atomic_inc(&pos->count); |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 334 | dprintk("RPC: %s found msg %p\n", __func__, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | return pos; |
| 336 | } |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 337 | dprintk("RPC: %s found nothing\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | return NULL; |
| 339 | } |
| 340 | |
\\\"J. Bruce Fields\\\ | 720b8f2 | 2008-06-09 16:51:33 -0400 | [diff] [blame] | 341 | /* Try to add an upcall to the pipefs queue. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | * If an upcall owned by our uid already exists, then we return a reference |
| 343 | * to that upcall instead of adding the new upcall. |
| 344 | */ |
| 345 | static inline struct gss_upcall_msg * |
Suresh Jayaraman | 053e324 | 2009-12-09 23:15:22 +0530 | [diff] [blame] | 346 | gss_add_msg(struct gss_upcall_msg *gss_msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 348 | struct rpc_pipe *pipe = gss_msg->pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | struct gss_upcall_msg *old; |
| 350 | |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 351 | spin_lock(&pipe->lock); |
| 352 | old = __gss_find_upcall(pipe, gss_msg->uid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | if (old == NULL) { |
| 354 | atomic_inc(&gss_msg->count); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 355 | list_add(&gss_msg->list, &pipe->in_downcall); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } else |
| 357 | gss_msg = old; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 358 | spin_unlock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | return gss_msg; |
| 360 | } |
| 361 | |
| 362 | static void |
| 363 | __gss_unhash_msg(struct gss_upcall_msg *gss_msg) |
| 364 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | list_del_init(&gss_msg->list); |
| 366 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); |
| 367 | wake_up_all(&gss_msg->waitqueue); |
| 368 | atomic_dec(&gss_msg->count); |
| 369 | } |
| 370 | |
| 371 | static void |
| 372 | gss_unhash_msg(struct gss_upcall_msg *gss_msg) |
| 373 | { |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 374 | struct rpc_pipe *pipe = gss_msg->pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 376 | if (list_empty(&gss_msg->list)) |
| 377 | return; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 378 | spin_lock(&pipe->lock); |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 379 | if (!list_empty(&gss_msg->list)) |
| 380 | __gss_unhash_msg(gss_msg); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 381 | spin_unlock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | static void |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 385 | gss_handle_downcall_result(struct gss_cred *gss_cred, struct gss_upcall_msg *gss_msg) |
| 386 | { |
| 387 | switch (gss_msg->msg.errno) { |
| 388 | case 0: |
| 389 | if (gss_msg->ctx == NULL) |
| 390 | break; |
| 391 | clear_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); |
| 392 | gss_cred_set_ctx(&gss_cred->gc_base, gss_msg->ctx); |
| 393 | break; |
| 394 | case -EKEYEXPIRED: |
| 395 | set_bit(RPCAUTH_CRED_NEGATIVE, &gss_cred->gc_base.cr_flags); |
| 396 | } |
| 397 | gss_cred->gc_upcall_timestamp = jiffies; |
| 398 | gss_cred->gc_upcall = NULL; |
| 399 | rpc_wake_up_status(&gss_msg->rpc_waitqueue, gss_msg->msg.errno); |
| 400 | } |
| 401 | |
| 402 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | gss_upcall_callback(struct rpc_task *task) |
| 404 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 405 | struct gss_cred *gss_cred = container_of(task->tk_rqstp->rq_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | struct gss_cred, gc_base); |
| 407 | struct gss_upcall_msg *gss_msg = gss_cred->gc_upcall; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 408 | struct rpc_pipe *pipe = gss_msg->pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 410 | spin_lock(&pipe->lock); |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 411 | gss_handle_downcall_result(gss_cred, gss_msg); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 412 | spin_unlock(&pipe->lock); |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 413 | task->tk_status = gss_msg->msg.errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | gss_release_msg(gss_msg); |
| 415 | } |
| 416 | |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 417 | static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) |
| 418 | { |
Eric W. Biederman | 90602c7 | 2013-02-02 00:25:43 -0800 | [diff] [blame] | 419 | uid_t uid = from_kuid(&init_user_ns, gss_msg->uid); |
| 420 | memcpy(gss_msg->databuf, &uid, sizeof(uid)); |
| 421 | gss_msg->msg.data = gss_msg->databuf; |
| 422 | gss_msg->msg.len = sizeof(uid); |
| 423 | BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 424 | } |
| 425 | |
Olga Kornievskaia | 8b1c7bf | 2008-12-23 16:19:26 -0500 | [diff] [blame] | 426 | static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 427 | const char *service_name, |
| 428 | const char *target_name) |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 429 | { |
Trond Myklebust | 683ac66 | 2010-04-08 14:09:58 -0400 | [diff] [blame] | 430 | struct gss_api_mech *mech = gss_msg->auth->mech; |
Olga Kornievskaia | 8b1c7bf | 2008-12-23 16:19:26 -0500 | [diff] [blame] | 431 | char *p = gss_msg->databuf; |
| 432 | int len = 0; |
| 433 | |
| 434 | gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", |
Trond Myklebust | 683ac66 | 2010-04-08 14:09:58 -0400 | [diff] [blame] | 435 | mech->gm_name, |
Eric W. Biederman | 90602c7 | 2013-02-02 00:25:43 -0800 | [diff] [blame] | 436 | from_kuid(&init_user_ns, gss_msg->uid)); |
Olga Kornievskaia | 8b1c7bf | 2008-12-23 16:19:26 -0500 | [diff] [blame] | 437 | p += gss_msg->msg.len; |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 438 | if (target_name) { |
| 439 | len = sprintf(p, "target=%s ", target_name); |
Olga Kornievskaia | 8b1c7bf | 2008-12-23 16:19:26 -0500 | [diff] [blame] | 440 | p += len; |
| 441 | gss_msg->msg.len += len; |
| 442 | } |
Trond Myklebust | 68c9715 | 2012-01-03 13:22:46 -0500 | [diff] [blame] | 443 | if (service_name != NULL) { |
| 444 | len = sprintf(p, "service=%s ", service_name); |
Olga Kornievskaia | 2efef70 | 2008-12-23 16:19:56 -0500 | [diff] [blame] | 445 | p += len; |
| 446 | gss_msg->msg.len += len; |
| 447 | } |
Trond Myklebust | 683ac66 | 2010-04-08 14:09:58 -0400 | [diff] [blame] | 448 | if (mech->gm_upcall_enctypes) { |
Kevin Coffman | f862822 | 2011-03-03 00:51:41 +0000 | [diff] [blame] | 449 | len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); |
Trond Myklebust | 683ac66 | 2010-04-08 14:09:58 -0400 | [diff] [blame] | 450 | p += len; |
| 451 | gss_msg->msg.len += len; |
| 452 | } |
Olga Kornievskaia | 8b1c7bf | 2008-12-23 16:19:26 -0500 | [diff] [blame] | 453 | len = sprintf(p, "\n"); |
| 454 | gss_msg->msg.len += len; |
| 455 | |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 456 | gss_msg->msg.data = gss_msg->databuf; |
| 457 | BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); |
| 458 | } |
| 459 | |
Trond Myklebust | 68c9715 | 2012-01-03 13:22:46 -0500 | [diff] [blame] | 460 | static struct gss_upcall_msg * |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 461 | gss_alloc_msg(struct gss_auth *gss_auth, |
Eric W. Biederman | 7eaf040 | 2013-02-01 16:31:17 -0800 | [diff] [blame] | 462 | kuid_t uid, const char *service_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
| 464 | struct gss_upcall_msg *gss_msg; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 465 | int vers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
Trond Myklebust | 0f38b87 | 2008-06-10 18:31:01 -0400 | [diff] [blame] | 467 | gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); |
\"J. Bruce Fields\ | db75b3d | 2008-12-23 16:07:13 -0500 | [diff] [blame] | 468 | if (gss_msg == NULL) |
| 469 | return ERR_PTR(-ENOMEM); |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 470 | vers = get_pipe_version(gss_auth->net); |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 471 | if (vers < 0) { |
| 472 | kfree(gss_msg); |
| 473 | return ERR_PTR(vers); |
| 474 | } |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 475 | gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; |
\"J. Bruce Fields\ | db75b3d | 2008-12-23 16:07:13 -0500 | [diff] [blame] | 476 | INIT_LIST_HEAD(&gss_msg->list); |
| 477 | rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); |
| 478 | init_waitqueue_head(&gss_msg->waitqueue); |
| 479 | atomic_set(&gss_msg->count, 1); |
\"J. Bruce Fields\ | db75b3d | 2008-12-23 16:07:13 -0500 | [diff] [blame] | 480 | gss_msg->uid = uid; |
| 481 | gss_msg->auth = gss_auth; |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 482 | switch (vers) { |
| 483 | case 0: |
| 484 | gss_encode_v0_msg(gss_msg); |
| 485 | default: |
| 486 | gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); |
| 487 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | return gss_msg; |
| 489 | } |
| 490 | |
| 491 | static struct gss_upcall_msg * |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 492 | gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
Trond Myklebust | 7c67db3 | 2008-04-07 20:50:11 -0400 | [diff] [blame] | 494 | struct gss_cred *gss_cred = container_of(cred, |
| 495 | struct gss_cred, gc_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | struct gss_upcall_msg *gss_new, *gss_msg; |
Eric W. Biederman | 7eaf040 | 2013-02-01 16:31:17 -0800 | [diff] [blame] | 497 | kuid_t uid = cred->cr_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 499 | gss_new = gss_alloc_msg(gss_auth, uid, gss_cred->gc_principal); |
\"J. Bruce Fields\ | db75b3d | 2008-12-23 16:07:13 -0500 | [diff] [blame] | 500 | if (IS_ERR(gss_new)) |
| 501 | return gss_new; |
Suresh Jayaraman | 053e324 | 2009-12-09 23:15:22 +0530 | [diff] [blame] | 502 | gss_msg = gss_add_msg(gss_new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (gss_msg == gss_new) { |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 504 | int res = rpc_queue_upcall(gss_new->pipe, &gss_new->msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | if (res) { |
| 506 | gss_unhash_msg(gss_new); |
| 507 | gss_msg = ERR_PTR(res); |
| 508 | } |
| 509 | } else |
| 510 | gss_release_msg(gss_new); |
| 511 | return gss_msg; |
| 512 | } |
| 513 | |
\"J. Bruce Fields\ | b03568c | 2008-12-23 16:06:55 -0500 | [diff] [blame] | 514 | static void warn_gssd(void) |
| 515 | { |
| 516 | static unsigned long ratelimit; |
| 517 | unsigned long now = jiffies; |
| 518 | |
| 519 | if (time_after(now, ratelimit)) { |
| 520 | printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" |
| 521 | "Please check user daemon is running.\n"); |
| 522 | ratelimit = now + 15*HZ; |
| 523 | } |
| 524 | } |
| 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | static inline int |
| 527 | gss_refresh_upcall(struct rpc_task *task) |
| 528 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 529 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
Trond Myklebust | 4a8c134 | 2007-06-07 10:14:14 -0400 | [diff] [blame] | 530 | struct gss_auth *gss_auth = container_of(cred->cr_auth, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | struct gss_auth, rpc_auth); |
| 532 | struct gss_cred *gss_cred = container_of(cred, |
| 533 | struct gss_cred, gc_base); |
| 534 | struct gss_upcall_msg *gss_msg; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 535 | struct rpc_pipe *pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | int err = 0; |
| 537 | |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 538 | dprintk("RPC: %5u %s for uid %u\n", |
Eric W. Biederman | cdba321 | 2013-02-01 17:10:52 -0800 | [diff] [blame] | 539 | task->tk_pid, __func__, from_kuid(&init_user_ns, cred->cr_uid)); |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 540 | gss_msg = gss_setup_upcall(gss_auth, cred); |
Roel Kluin | 480e324 | 2009-12-08 13:13:03 -0500 | [diff] [blame] | 541 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 542 | /* XXX: warning on the first, under the assumption we |
| 543 | * shouldn't normally hit this case on a refresh. */ |
| 544 | warn_gssd(); |
| 545 | task->tk_timeout = 15*HZ; |
| 546 | rpc_sleep_on(&pipe_version_rpc_waitqueue, task, NULL); |
Bryan Schumaker | d1a8016 | 2011-04-13 14:31:28 -0400 | [diff] [blame] | 547 | return -EAGAIN; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 548 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | if (IS_ERR(gss_msg)) { |
| 550 | err = PTR_ERR(gss_msg); |
| 551 | goto out; |
| 552 | } |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 553 | pipe = gss_msg->pipe; |
| 554 | spin_lock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | if (gss_cred->gc_upcall != NULL) |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 556 | rpc_sleep_on(&gss_cred->gc_upcall->rpc_waitqueue, task, NULL); |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 557 | else if (gss_msg->ctx == NULL && gss_msg->msg.errno >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | task->tk_timeout = 0; |
| 559 | gss_cred->gc_upcall = gss_msg; |
| 560 | /* gss_upcall_callback will release the reference to gss_upcall_msg */ |
| 561 | atomic_inc(&gss_msg->count); |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 562 | rpc_sleep_on(&gss_msg->rpc_waitqueue, task, gss_upcall_callback); |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 563 | } else { |
| 564 | gss_handle_downcall_result(gss_cred, gss_msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | err = gss_msg->msg.errno; |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 566 | } |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 567 | spin_unlock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | gss_release_msg(gss_msg); |
| 569 | out: |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 570 | dprintk("RPC: %5u %s for uid %u result %d\n", |
Eric W. Biederman | cdba321 | 2013-02-01 17:10:52 -0800 | [diff] [blame] | 571 | task->tk_pid, __func__, |
| 572 | from_kuid(&init_user_ns, cred->cr_uid), err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | return err; |
| 574 | } |
| 575 | |
| 576 | static inline int |
| 577 | gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) |
| 578 | { |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 579 | struct net *net = gss_auth->net; |
Trond Myklebust | abfdbd5 | 2013-05-15 11:28:54 -0700 | [diff] [blame] | 580 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 581 | struct rpc_pipe *pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | struct rpc_cred *cred = &gss_cred->gc_base; |
| 583 | struct gss_upcall_msg *gss_msg; |
Trond Myklebust | abfdbd5 | 2013-05-15 11:28:54 -0700 | [diff] [blame] | 584 | unsigned long timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | DEFINE_WAIT(wait); |
Trond Myklebust | d36ccb9 | 2013-05-15 10:46:33 -0700 | [diff] [blame] | 586 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
Eric W. Biederman | cdba321 | 2013-02-01 17:10:52 -0800 | [diff] [blame] | 588 | dprintk("RPC: %s for uid %u\n", |
| 589 | __func__, from_kuid(&init_user_ns, cred->cr_uid)); |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 590 | retry: |
Trond Myklebust | d36ccb9 | 2013-05-15 10:46:33 -0700 | [diff] [blame] | 591 | err = 0; |
Trond Myklebust | abfdbd5 | 2013-05-15 11:28:54 -0700 | [diff] [blame] | 592 | /* Default timeout is 15s unless we know that gssd is not running */ |
| 593 | timeout = 15 * HZ; |
| 594 | if (!sn->gssd_running) |
| 595 | timeout = HZ >> 2; |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 596 | gss_msg = gss_setup_upcall(gss_auth, cred); |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 597 | if (PTR_ERR(gss_msg) == -EAGAIN) { |
| 598 | err = wait_event_interruptible_timeout(pipe_version_waitqueue, |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 599 | sn->pipe_version >= 0, timeout); |
| 600 | if (sn->pipe_version < 0) { |
Trond Myklebust | abfdbd5 | 2013-05-15 11:28:54 -0700 | [diff] [blame] | 601 | if (err == 0) |
| 602 | sn->gssd_running = 0; |
Bryan Schumaker | d1a8016 | 2011-04-13 14:31:28 -0400 | [diff] [blame] | 603 | warn_gssd(); |
| 604 | err = -EACCES; |
| 605 | } |
Trond Myklebust | d36ccb9 | 2013-05-15 10:46:33 -0700 | [diff] [blame] | 606 | if (err < 0) |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 607 | goto out; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 608 | goto retry; |
| 609 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | if (IS_ERR(gss_msg)) { |
| 611 | err = PTR_ERR(gss_msg); |
| 612 | goto out; |
| 613 | } |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 614 | pipe = gss_msg->pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | for (;;) { |
Trond Myklebust | 5afa9133 | 2011-06-17 10:14:59 -0400 | [diff] [blame] | 616 | prepare_to_wait(&gss_msg->waitqueue, &wait, TASK_KILLABLE); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 617 | spin_lock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | if (gss_msg->ctx != NULL || gss_msg->msg.errno < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | break; |
| 620 | } |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 621 | spin_unlock(&pipe->lock); |
Trond Myklebust | 5afa9133 | 2011-06-17 10:14:59 -0400 | [diff] [blame] | 622 | if (fatal_signal_pending(current)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | err = -ERESTARTSYS; |
| 624 | goto out_intr; |
| 625 | } |
| 626 | schedule(); |
| 627 | } |
| 628 | if (gss_msg->ctx) |
Trond Myklebust | 7b6962b | 2008-04-17 16:53:01 -0400 | [diff] [blame] | 629 | gss_cred_set_ctx(cred, gss_msg->ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | else |
| 631 | err = gss_msg->msg.errno; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 632 | spin_unlock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | out_intr: |
| 634 | finish_wait(&gss_msg->waitqueue, &wait); |
| 635 | gss_release_msg(gss_msg); |
| 636 | out: |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 637 | dprintk("RPC: %s for uid %u result %d\n", |
Eric W. Biederman | cdba321 | 2013-02-01 17:10:52 -0800 | [diff] [blame] | 638 | __func__, from_kuid(&init_user_ns, cred->cr_uid), err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | return err; |
| 640 | } |
| 641 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | #define MSG_BUF_MAXSIZE 1024 |
| 643 | |
| 644 | static ssize_t |
| 645 | gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) |
| 646 | { |
| 647 | const void *p, *end; |
| 648 | void *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | struct gss_upcall_msg *gss_msg; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 650 | struct rpc_pipe *pipe = RPC_I(file_inode(filp))->pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | struct gss_cl_ctx *ctx; |
Eric W. Biederman | 90602c7 | 2013-02-02 00:25:43 -0800 | [diff] [blame] | 652 | uid_t id; |
| 653 | kuid_t uid; |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 654 | ssize_t err = -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | if (mlen > MSG_BUF_MAXSIZE) |
| 657 | goto out; |
| 658 | err = -ENOMEM; |
Trond Myklebust | 0f38b87 | 2008-06-10 18:31:01 -0400 | [diff] [blame] | 659 | buf = kmalloc(mlen, GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | if (!buf) |
| 661 | goto out; |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | err = -EFAULT; |
| 664 | if (copy_from_user(buf, src, mlen)) |
| 665 | goto err; |
| 666 | |
| 667 | end = (const void *)((char *)buf + mlen); |
Eric W. Biederman | 90602c7 | 2013-02-02 00:25:43 -0800 | [diff] [blame] | 668 | p = simple_get_bytes(buf, end, &id, sizeof(id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | if (IS_ERR(p)) { |
| 670 | err = PTR_ERR(p); |
| 671 | goto err; |
| 672 | } |
| 673 | |
Eric W. Biederman | 90602c7 | 2013-02-02 00:25:43 -0800 | [diff] [blame] | 674 | uid = make_kuid(&init_user_ns, id); |
| 675 | if (!uid_valid(uid)) { |
| 676 | err = -EINVAL; |
| 677 | goto err; |
| 678 | } |
| 679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | err = -ENOMEM; |
| 681 | ctx = gss_alloc_context(); |
| 682 | if (ctx == NULL) |
| 683 | goto err; |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 684 | |
| 685 | err = -ENOENT; |
| 686 | /* Find a matching upcall */ |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 687 | spin_lock(&pipe->lock); |
| 688 | gss_msg = __gss_find_upcall(pipe, uid); |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 689 | if (gss_msg == NULL) { |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 690 | spin_unlock(&pipe->lock); |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 691 | goto err_put_ctx; |
| 692 | } |
| 693 | list_del_init(&gss_msg->list); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 694 | spin_unlock(&pipe->lock); |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 695 | |
Trond Myklebust | 6e84c7b | 2007-06-07 15:31:36 -0400 | [diff] [blame] | 696 | p = gss_fill_context(p, end, ctx, gss_msg->auth->mech); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | if (IS_ERR(p)) { |
| 698 | err = PTR_ERR(p); |
Jeff Layton | 486bad2 | 2009-12-18 16:28:20 -0500 | [diff] [blame] | 699 | switch (err) { |
| 700 | case -EACCES: |
Jeff Layton | dc5ddce | 2010-01-07 09:42:02 -0500 | [diff] [blame] | 701 | case -EKEYEXPIRED: |
Jeff Layton | 486bad2 | 2009-12-18 16:28:20 -0500 | [diff] [blame] | 702 | gss_msg->msg.errno = err; |
| 703 | err = mlen; |
| 704 | break; |
| 705 | case -EFAULT: |
| 706 | case -ENOMEM: |
| 707 | case -EINVAL: |
| 708 | case -ENOSYS: |
| 709 | gss_msg->msg.errno = -EAGAIN; |
| 710 | break; |
| 711 | default: |
| 712 | printk(KERN_CRIT "%s: bad return from " |
Randy Dunlap | 6c85309 | 2010-01-06 17:26:27 -0500 | [diff] [blame] | 713 | "gss_fill_context: %zd\n", __func__, err); |
Jeff Layton | 486bad2 | 2009-12-18 16:28:20 -0500 | [diff] [blame] | 714 | BUG(); |
| 715 | } |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 716 | goto err_release_msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 718 | gss_msg->ctx = gss_get_ctx(ctx); |
| 719 | err = mlen; |
| 720 | |
| 721 | err_release_msg: |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 722 | spin_lock(&pipe->lock); |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 723 | __gss_unhash_msg(gss_msg); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 724 | spin_unlock(&pipe->lock); |
Trond Myklebust | 3b68aae | 2007-06-07 10:14:15 -0400 | [diff] [blame] | 725 | gss_release_msg(gss_msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | err_put_ctx: |
| 727 | gss_put_ctx(ctx); |
| 728 | err: |
| 729 | kfree(buf); |
| 730 | out: |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 731 | dprintk("RPC: %s returning %Zd\n", __func__, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | return err; |
| 733 | } |
| 734 | |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 735 | static int gss_pipe_open(struct inode *inode, int new_version) |
\"J. Bruce Fields\ | cf81939 | 2008-12-23 16:10:19 -0500 | [diff] [blame] | 736 | { |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 737 | struct net *net = inode->i_sb->s_fs_info; |
| 738 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 739 | int ret = 0; |
| 740 | |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 741 | spin_lock(&pipe_version_lock); |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 742 | if (sn->pipe_version < 0) { |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 743 | /* First open of any gss pipe determines the version: */ |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 744 | sn->pipe_version = new_version; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 745 | rpc_wake_up(&pipe_version_rpc_waitqueue); |
| 746 | wake_up(&pipe_version_waitqueue); |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 747 | } else if (sn->pipe_version != new_version) { |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 748 | /* Trying to open a pipe of a different version */ |
| 749 | ret = -EBUSY; |
| 750 | goto out; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 751 | } |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 752 | atomic_inc(&sn->pipe_users); |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 753 | out: |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 754 | spin_unlock(&pipe_version_lock); |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 755 | return ret; |
| 756 | |
| 757 | } |
| 758 | |
| 759 | static int gss_pipe_open_v0(struct inode *inode) |
| 760 | { |
| 761 | return gss_pipe_open(inode, 0); |
| 762 | } |
| 763 | |
| 764 | static int gss_pipe_open_v1(struct inode *inode) |
| 765 | { |
| 766 | return gss_pipe_open(inode, 1); |
\"J. Bruce Fields\ | cf81939 | 2008-12-23 16:10:19 -0500 | [diff] [blame] | 767 | } |
| 768 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | static void |
| 770 | gss_pipe_release(struct inode *inode) |
| 771 | { |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 772 | struct net *net = inode->i_sb->s_fs_info; |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 773 | struct rpc_pipe *pipe = RPC_I(inode)->pipe; |
Trond Myklebust | 6e84c7b | 2007-06-07 15:31:36 -0400 | [diff] [blame] | 774 | struct gss_upcall_msg *gss_msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Trond Myklebust | 5a67657 | 2010-09-12 19:55:25 -0400 | [diff] [blame] | 776 | restart: |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 777 | spin_lock(&pipe->lock); |
| 778 | list_for_each_entry(gss_msg, &pipe->in_downcall, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
Trond Myklebust | 5a67657 | 2010-09-12 19:55:25 -0400 | [diff] [blame] | 780 | if (!list_empty(&gss_msg->msg.list)) |
| 781 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | gss_msg->msg.errno = -EPIPE; |
| 783 | atomic_inc(&gss_msg->count); |
| 784 | __gss_unhash_msg(gss_msg); |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 785 | spin_unlock(&pipe->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | gss_release_msg(gss_msg); |
Trond Myklebust | 5a67657 | 2010-09-12 19:55:25 -0400 | [diff] [blame] | 787 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | } |
Stanislav Kinsbursky | 9beae46 | 2011-12-26 15:43:57 +0300 | [diff] [blame] | 789 | spin_unlock(&pipe->lock); |
\"J. Bruce Fields\ | cf81939 | 2008-12-23 16:10:19 -0500 | [diff] [blame] | 790 | |
Trond Myklebust | 2aed8b4 | 2013-05-15 10:27:32 -0700 | [diff] [blame] | 791 | put_pipe_version(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | static void |
| 795 | gss_pipe_destroy_msg(struct rpc_pipe_msg *msg) |
| 796 | { |
| 797 | struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | |
| 799 | if (msg->errno < 0) { |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 800 | dprintk("RPC: %s releasing msg %p\n", |
| 801 | __func__, gss_msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | atomic_inc(&gss_msg->count); |
| 803 | gss_unhash_msg(gss_msg); |
\"J. Bruce Fields\ | b03568c | 2008-12-23 16:06:55 -0500 | [diff] [blame] | 804 | if (msg->errno == -ETIMEDOUT) |
| 805 | warn_gssd(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | gss_release_msg(gss_msg); |
| 807 | } |
| 808 | } |
| 809 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 810 | static void gss_pipe_dentry_destroy(struct dentry *dir, |
| 811 | struct rpc_pipe_dir_object *pdo) |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 812 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 813 | struct gss_pipe *gss_pipe = pdo->pdo_data; |
| 814 | struct rpc_pipe *pipe = gss_pipe->pipe; |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 815 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 816 | if (pipe->dentry != NULL) { |
| 817 | rpc_unlink(pipe->dentry); |
| 818 | pipe->dentry = NULL; |
Trond Myklebust | 6b2fddd | 2013-08-26 16:05:11 -0400 | [diff] [blame] | 819 | } |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 820 | } |
| 821 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 822 | static int gss_pipe_dentry_create(struct dentry *dir, |
| 823 | struct rpc_pipe_dir_object *pdo) |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 824 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 825 | struct gss_pipe *p = pdo->pdo_data; |
Trond Myklebust | 6b2fddd | 2013-08-26 16:05:11 -0400 | [diff] [blame] | 826 | struct dentry *dentry; |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 827 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 828 | dentry = rpc_mkpipe_dentry(dir, p->name, p->clnt, p->pipe); |
| 829 | if (IS_ERR(dentry)) |
| 830 | return PTR_ERR(dentry); |
| 831 | p->pipe->dentry = dentry; |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 832 | return 0; |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 833 | } |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 834 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 835 | static const struct rpc_pipe_dir_object_ops gss_pipe_dir_object_ops = { |
| 836 | .create = gss_pipe_dentry_create, |
| 837 | .destroy = gss_pipe_dentry_destroy, |
| 838 | }; |
| 839 | |
| 840 | static struct gss_pipe *gss_pipe_alloc(struct rpc_clnt *clnt, |
| 841 | const char *name, |
| 842 | const struct rpc_pipe_ops *upcall_ops) |
| 843 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 844 | struct gss_pipe *p; |
| 845 | int err = -ENOMEM; |
| 846 | |
| 847 | p = kmalloc(sizeof(*p), GFP_KERNEL); |
| 848 | if (p == NULL) |
| 849 | goto err; |
| 850 | p->pipe = rpc_mkpipe_data(upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); |
| 851 | if (IS_ERR(p->pipe)) { |
| 852 | err = PTR_ERR(p->pipe); |
| 853 | goto err_free_gss_pipe; |
| 854 | } |
| 855 | p->name = name; |
| 856 | p->clnt = clnt; |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 857 | kref_init(&p->kref); |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 858 | rpc_init_pipe_dir_object(&p->pdo, |
| 859 | &gss_pipe_dir_object_ops, |
| 860 | p); |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 861 | return p; |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 862 | err_free_gss_pipe: |
| 863 | kfree(p); |
Trond Myklebust | 6b2fddd | 2013-08-26 16:05:11 -0400 | [diff] [blame] | 864 | err: |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 865 | return ERR_PTR(err); |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 866 | } |
| 867 | |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 868 | struct gss_alloc_pdo { |
| 869 | struct rpc_clnt *clnt; |
| 870 | const char *name; |
| 871 | const struct rpc_pipe_ops *upcall_ops; |
| 872 | }; |
| 873 | |
| 874 | static int gss_pipe_match_pdo(struct rpc_pipe_dir_object *pdo, void *data) |
| 875 | { |
| 876 | struct gss_pipe *gss_pipe; |
| 877 | struct gss_alloc_pdo *args = data; |
| 878 | |
| 879 | if (pdo->pdo_ops != &gss_pipe_dir_object_ops) |
| 880 | return 0; |
| 881 | gss_pipe = container_of(pdo, struct gss_pipe, pdo); |
| 882 | if (strcmp(gss_pipe->name, args->name) != 0) |
| 883 | return 0; |
| 884 | if (!kref_get_unless_zero(&gss_pipe->kref)) |
| 885 | return 0; |
| 886 | return 1; |
| 887 | } |
| 888 | |
| 889 | static struct rpc_pipe_dir_object *gss_pipe_alloc_pdo(void *data) |
| 890 | { |
| 891 | struct gss_pipe *gss_pipe; |
| 892 | struct gss_alloc_pdo *args = data; |
| 893 | |
| 894 | gss_pipe = gss_pipe_alloc(args->clnt, args->name, args->upcall_ops); |
| 895 | if (!IS_ERR(gss_pipe)) |
| 896 | return &gss_pipe->pdo; |
| 897 | return NULL; |
| 898 | } |
| 899 | |
| 900 | static struct gss_pipe *gss_pipe_get(struct rpc_clnt *clnt, |
| 901 | const char *name, |
| 902 | const struct rpc_pipe_ops *upcall_ops) |
| 903 | { |
| 904 | struct net *net = rpc_net_ns(clnt); |
| 905 | struct rpc_pipe_dir_object *pdo; |
| 906 | struct gss_alloc_pdo args = { |
| 907 | .clnt = clnt, |
| 908 | .name = name, |
| 909 | .upcall_ops = upcall_ops, |
| 910 | }; |
| 911 | |
| 912 | pdo = rpc_find_or_alloc_pipe_dir_object(net, |
| 913 | &clnt->cl_pipedir_objects, |
| 914 | gss_pipe_match_pdo, |
| 915 | gss_pipe_alloc_pdo, |
| 916 | &args); |
| 917 | if (pdo != NULL) |
| 918 | return container_of(pdo, struct gss_pipe, pdo); |
| 919 | return ERR_PTR(-ENOMEM); |
| 920 | } |
| 921 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 922 | static void __gss_pipe_free(struct gss_pipe *p) |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 923 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 924 | struct rpc_clnt *clnt = p->clnt; |
| 925 | struct net *net = rpc_net_ns(clnt); |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 926 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 927 | rpc_remove_pipe_dir_object(net, |
| 928 | &clnt->cl_pipedir_objects, |
| 929 | &p->pdo); |
| 930 | rpc_destroy_pipe_data(p->pipe); |
| 931 | kfree(p); |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 932 | } |
| 933 | |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 934 | static void __gss_pipe_release(struct kref *kref) |
| 935 | { |
| 936 | struct gss_pipe *p = container_of(kref, struct gss_pipe, kref); |
| 937 | |
| 938 | __gss_pipe_free(p); |
| 939 | } |
| 940 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 941 | static void gss_pipe_free(struct gss_pipe *p) |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 942 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 943 | if (p != NULL) |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 944 | kref_put(&p->kref, __gss_pipe_release); |
Stanislav Kinsbursky | ccdc28f | 2012-01-11 19:18:09 +0400 | [diff] [blame] | 945 | } |
| 946 | |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 947 | /* |
| 948 | * NOTE: we have the opportunity to use different |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | * parameters based on the input flavor (which must be a pseudoflavor) |
| 950 | */ |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 951 | static struct gss_auth * |
| 952 | gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
Trond Myklebust | c219066 | 2013-08-26 19:23:04 -0400 | [diff] [blame] | 954 | rpc_authflavor_t flavor = args->pseudoflavor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | struct gss_auth *gss_auth; |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 956 | struct gss_pipe *gss_pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | struct rpc_auth * auth; |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 958 | int err = -ENOMEM; /* XXX? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
Chuck Lever | 8885cb3 | 2007-01-31 12:14:05 -0500 | [diff] [blame] | 960 | dprintk("RPC: creating GSS authenticator for client %p\n", clnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
| 962 | if (!try_module_get(THIS_MODULE)) |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 963 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL))) |
| 965 | goto out_dec; |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 966 | INIT_HLIST_NODE(&gss_auth->hash); |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 967 | gss_auth->target_name = NULL; |
Trond Myklebust | c219066 | 2013-08-26 19:23:04 -0400 | [diff] [blame] | 968 | if (args->target_name) { |
| 969 | gss_auth->target_name = kstrdup(args->target_name, GFP_KERNEL); |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 970 | if (gss_auth->target_name == NULL) |
| 971 | goto err_free; |
| 972 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | gss_auth->client = clnt; |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 974 | gss_auth->net = get_net(rpc_net_ns(clnt)); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 975 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor); |
| 977 | if (!gss_auth->mech) { |
Trond Myklebust | 9b1d75b | 2013-05-01 09:17:50 -0400 | [diff] [blame] | 978 | dprintk("RPC: Pseudoflavor %d not found!\n", flavor); |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 979 | goto err_put_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); |
J. Bruce Fields | 438b6fd | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 982 | if (gss_auth->service == 0) |
| 983 | goto err_put_mech; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | auth = &gss_auth->rpc_auth; |
| 985 | auth->au_cslack = GSS_CRED_SLACK >> 2; |
| 986 | auth->au_rslack = GSS_VERF_SLACK >> 2; |
| 987 | auth->au_ops = &authgss_ops; |
| 988 | auth->au_flavor = flavor; |
| 989 | atomic_set(&auth->au_count, 1); |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 990 | kref_init(&gss_auth->kref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 992 | err = rpcauth_init_credcache(auth); |
| 993 | if (err) |
| 994 | goto err_put_mech; |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 995 | /* |
| 996 | * Note: if we created the old pipe first, then someone who |
| 997 | * examined the directory at the right moment might conclude |
| 998 | * that we supported only the old pipe. So we instead create |
| 999 | * the new pipe first. |
| 1000 | */ |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 1001 | gss_pipe = gss_pipe_get(clnt, "gssd", &gss_upcall_ops_v1); |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1002 | if (IS_ERR(gss_pipe)) { |
| 1003 | err = PTR_ERR(gss_pipe); |
| 1004 | goto err_destroy_credcache; |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1005 | } |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1006 | gss_auth->gss_pipe[1] = gss_pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 1008 | gss_pipe = gss_pipe_get(clnt, gss_auth->mech->gm_name, |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1009 | &gss_upcall_ops_v0); |
| 1010 | if (IS_ERR(gss_pipe)) { |
| 1011 | err = PTR_ERR(gss_pipe); |
Stanislav Kinsbursky | c239d83 | 2011-12-26 15:44:06 +0300 | [diff] [blame] | 1012 | goto err_destroy_pipe_1; |
| 1013 | } |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1014 | gss_auth->gss_pipe[0] = gss_pipe; |
Trond Myklebust | 07a2bf1 | 2007-06-09 15:42:01 -0400 | [diff] [blame] | 1015 | |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 1016 | return gss_auth; |
Stanislav Kinsbursky | c239d83 | 2011-12-26 15:44:06 +0300 | [diff] [blame] | 1017 | err_destroy_pipe_1: |
Trond Myklebust | 414a629 | 2013-08-27 16:52:16 -0400 | [diff] [blame] | 1018 | gss_pipe_free(gss_auth->gss_pipe[1]); |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1019 | err_destroy_credcache: |
| 1020 | rpcauth_destroy_credcache(auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | err_put_mech: |
| 1022 | gss_mech_put(gss_auth->mech); |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 1023 | err_put_net: |
| 1024 | put_net(gss_auth->net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | err_free: |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 1026 | kfree(gss_auth->target_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | kfree(gss_auth); |
| 1028 | out_dec: |
| 1029 | module_put(THIS_MODULE); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1030 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | static void |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1034 | gss_free(struct gss_auth *gss_auth) |
| 1035 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1036 | gss_pipe_free(gss_auth->gss_pipe[0]); |
| 1037 | gss_pipe_free(gss_auth->gss_pipe[1]); |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1038 | gss_mech_put(gss_auth->mech); |
Trond Myklebust | e726340a | 2013-08-23 14:42:29 -0400 | [diff] [blame] | 1039 | put_net(gss_auth->net); |
Trond Myklebust | bd4a3eb | 2013-08-23 14:02:24 -0400 | [diff] [blame] | 1040 | kfree(gss_auth->target_name); |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1041 | |
| 1042 | kfree(gss_auth); |
| 1043 | module_put(THIS_MODULE); |
| 1044 | } |
| 1045 | |
| 1046 | static void |
| 1047 | gss_free_callback(struct kref *kref) |
| 1048 | { |
| 1049 | struct gss_auth *gss_auth = container_of(kref, struct gss_auth, kref); |
| 1050 | |
| 1051 | gss_free(gss_auth); |
| 1052 | } |
| 1053 | |
| 1054 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | gss_destroy(struct rpc_auth *auth) |
| 1056 | { |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1057 | struct gss_auth *gss_auth = container_of(auth, |
| 1058 | struct gss_auth, rpc_auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
Chuck Lever | 8885cb3 | 2007-01-31 12:14:05 -0500 | [diff] [blame] | 1060 | dprintk("RPC: destroying GSS authenticator %p flavor %d\n", |
| 1061 | auth, auth->au_flavor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 1063 | if (hash_hashed(&gss_auth->hash)) { |
| 1064 | spin_lock(&gss_auth_hash_lock); |
| 1065 | hash_del(&gss_auth->hash); |
| 1066 | spin_unlock(&gss_auth_hash_lock); |
| 1067 | } |
| 1068 | |
Trond Myklebust | 1917228 | 2013-08-26 16:44:42 -0400 | [diff] [blame] | 1069 | gss_pipe_free(gss_auth->gss_pipe[0]); |
| 1070 | gss_auth->gss_pipe[0] = NULL; |
| 1071 | gss_pipe_free(gss_auth->gss_pipe[1]); |
| 1072 | gss_auth->gss_pipe[1] = NULL; |
Trond Myklebust | 3ab9bb7 | 2007-06-09 15:41:42 -0400 | [diff] [blame] | 1073 | rpcauth_destroy_credcache(auth); |
| 1074 | |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1075 | kref_put(&gss_auth->kref, gss_free_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | } |
| 1077 | |
J. Bruce Fields | a0f6ed8 | 2013-09-18 11:16:03 -0400 | [diff] [blame] | 1078 | /* |
| 1079 | * Auths may be shared between rpc clients that were cloned from a |
| 1080 | * common client with the same xprt, if they also share the flavor and |
| 1081 | * target_name. |
| 1082 | * |
| 1083 | * The auth is looked up from the oldest parent sharing the same |
| 1084 | * cl_xprt, and the auth itself references only that common parent |
| 1085 | * (which is guaranteed to last as long as any of its descendants). |
| 1086 | */ |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 1087 | static struct gss_auth * |
| 1088 | gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, |
| 1089 | struct rpc_clnt *clnt, |
| 1090 | struct gss_auth *new) |
| 1091 | { |
| 1092 | struct gss_auth *gss_auth; |
| 1093 | unsigned long hashval = (unsigned long)clnt; |
| 1094 | |
| 1095 | spin_lock(&gss_auth_hash_lock); |
| 1096 | hash_for_each_possible(gss_auth_hash_table, |
| 1097 | gss_auth, |
| 1098 | hash, |
| 1099 | hashval) { |
J. Bruce Fields | a0f6ed8 | 2013-09-18 11:16:03 -0400 | [diff] [blame] | 1100 | if (gss_auth->client != clnt) |
| 1101 | continue; |
Trond Myklebust | eb6dc19 | 2013-08-28 15:26:25 -0400 | [diff] [blame] | 1102 | if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) |
| 1103 | continue; |
| 1104 | if (gss_auth->target_name != args->target_name) { |
| 1105 | if (gss_auth->target_name == NULL) |
| 1106 | continue; |
| 1107 | if (args->target_name == NULL) |
| 1108 | continue; |
| 1109 | if (strcmp(gss_auth->target_name, args->target_name)) |
| 1110 | continue; |
| 1111 | } |
| 1112 | if (!atomic_inc_not_zero(&gss_auth->rpc_auth.au_count)) |
| 1113 | continue; |
| 1114 | goto out; |
| 1115 | } |
| 1116 | if (new) |
| 1117 | hash_add(gss_auth_hash_table, &new->hash, hashval); |
| 1118 | gss_auth = new; |
| 1119 | out: |
| 1120 | spin_unlock(&gss_auth_hash_lock); |
| 1121 | return gss_auth; |
| 1122 | } |
| 1123 | |
| 1124 | static struct gss_auth * |
| 1125 | gss_create_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
| 1126 | { |
| 1127 | struct gss_auth *gss_auth; |
| 1128 | struct gss_auth *new; |
| 1129 | |
| 1130 | gss_auth = gss_auth_find_or_add_hashed(args, clnt, NULL); |
| 1131 | if (gss_auth != NULL) |
| 1132 | goto out; |
| 1133 | new = gss_create_new(args, clnt); |
| 1134 | if (IS_ERR(new)) |
| 1135 | return new; |
| 1136 | gss_auth = gss_auth_find_or_add_hashed(args, clnt, new); |
| 1137 | if (gss_auth != new) |
| 1138 | gss_destroy(&new->rpc_auth); |
| 1139 | out: |
| 1140 | return gss_auth; |
| 1141 | } |
| 1142 | |
| 1143 | static struct rpc_auth * |
| 1144 | gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
| 1145 | { |
| 1146 | struct gss_auth *gss_auth; |
| 1147 | struct rpc_xprt *xprt = rcu_access_pointer(clnt->cl_xprt); |
| 1148 | |
| 1149 | while (clnt != clnt->cl_parent) { |
| 1150 | struct rpc_clnt *parent = clnt->cl_parent; |
| 1151 | /* Find the original parent for this transport */ |
| 1152 | if (rcu_access_pointer(parent->cl_xprt) != xprt) |
| 1153 | break; |
| 1154 | clnt = parent; |
| 1155 | } |
| 1156 | |
| 1157 | gss_auth = gss_create_hashed(args, clnt); |
| 1158 | if (IS_ERR(gss_auth)) |
| 1159 | return ERR_CAST(gss_auth); |
| 1160 | return &gss_auth->rpc_auth; |
| 1161 | } |
| 1162 | |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1163 | /* |
| 1164 | * gss_destroying_context will cause the RPCSEC_GSS to send a NULL RPC call |
| 1165 | * to the server with the GSS control procedure field set to |
| 1166 | * RPC_GSS_PROC_DESTROY. This should normally cause the server to release |
| 1167 | * all RPCSEC_GSS state associated with that context. |
| 1168 | */ |
| 1169 | static int |
| 1170 | gss_destroying_context(struct rpc_cred *cred) |
| 1171 | { |
| 1172 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
| 1173 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); |
| 1174 | struct rpc_task *task; |
| 1175 | |
| 1176 | if (gss_cred->gc_ctx == NULL || |
Jeff Layton | 6dcd392 | 2008-12-23 15:21:57 -0500 | [diff] [blame] | 1177 | test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1178 | return 0; |
| 1179 | |
| 1180 | gss_cred->gc_ctx->gc_proc = RPC_GSS_PROC_DESTROY; |
| 1181 | cred->cr_ops = &gss_nullops; |
| 1182 | |
| 1183 | /* Take a reference to ensure the cred will be destroyed either |
| 1184 | * by the RPC call or by the put_rpccred() below */ |
| 1185 | get_rpccred(cred); |
| 1186 | |
Trond Myklebust | 080a1f1 | 2008-04-19 14:22:31 -0400 | [diff] [blame] | 1187 | task = rpc_call_null(gss_auth->client, cred, RPC_TASK_ASYNC|RPC_TASK_SOFT); |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1188 | if (!IS_ERR(task)) |
| 1189 | rpc_put_task(task); |
| 1190 | |
| 1191 | put_rpccred(cred); |
| 1192 | return 1; |
| 1193 | } |
| 1194 | |
| 1195 | /* gss_destroy_cred (and gss_free_ctx) are used to clean up after failure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | * to create a new cred or context, so they check that things have been |
| 1197 | * allocated before freeing them. */ |
| 1198 | static void |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 1199 | gss_do_free_ctx(struct gss_cl_ctx *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | { |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1201 | dprintk("RPC: %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
Trond Myklebust | 0d8a374 | 2010-08-01 20:14:55 -0400 | [diff] [blame] | 1203 | gss_delete_sec_context(&ctx->gc_gss_ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | kfree(ctx->gc_wire_ctx.data); |
| 1205 | kfree(ctx); |
| 1206 | } |
| 1207 | |
| 1208 | static void |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 1209 | gss_free_ctx_callback(struct rcu_head *head) |
| 1210 | { |
| 1211 | struct gss_cl_ctx *ctx = container_of(head, struct gss_cl_ctx, gc_rcu); |
| 1212 | gss_do_free_ctx(ctx); |
| 1213 | } |
| 1214 | |
| 1215 | static void |
| 1216 | gss_free_ctx(struct gss_cl_ctx *ctx) |
| 1217 | { |
| 1218 | call_rcu(&ctx->gc_rcu, gss_free_ctx_callback); |
| 1219 | } |
| 1220 | |
| 1221 | static void |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 1222 | gss_free_cred(struct gss_cred *gss_cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | { |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1224 | dprintk("RPC: %s cred=%p\n", __func__, gss_cred); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 1225 | kfree(gss_cred); |
| 1226 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 1228 | static void |
| 1229 | gss_free_cred_callback(struct rcu_head *head) |
| 1230 | { |
| 1231 | struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu); |
| 1232 | gss_free_cred(gss_cred); |
| 1233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 1235 | static void |
Jeff Layton | 6dcd392 | 2008-12-23 15:21:57 -0500 | [diff] [blame] | 1236 | gss_destroy_nullcred(struct rpc_cred *cred) |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 1237 | { |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 1238 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, gc_base); |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1239 | struct gss_auth *gss_auth = container_of(cred->cr_auth, struct gss_auth, rpc_auth); |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 1240 | struct gss_cl_ctx *ctx = gss_cred->gc_ctx; |
| 1241 | |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1242 | RCU_INIT_POINTER(gss_cred->gc_ctx, NULL); |
Trond Myklebust | 31be5bf | 2007-06-24 15:55:26 -0400 | [diff] [blame] | 1243 | call_rcu(&cred->cr_rcu, gss_free_cred_callback); |
Trond Myklebust | 5d28dc8 | 2007-06-26 19:18:38 -0400 | [diff] [blame] | 1244 | if (ctx) |
| 1245 | gss_put_ctx(ctx); |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1246 | kref_put(&gss_auth->kref, gss_free_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | } |
| 1248 | |
Jeff Layton | 6dcd392 | 2008-12-23 15:21:57 -0500 | [diff] [blame] | 1249 | static void |
| 1250 | gss_destroy_cred(struct rpc_cred *cred) |
| 1251 | { |
| 1252 | |
| 1253 | if (gss_destroying_context(cred)) |
| 1254 | return; |
| 1255 | gss_destroy_nullcred(cred); |
| 1256 | } |
| 1257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | /* |
| 1259 | * Lookup RPCSEC_GSS cred for the current process |
| 1260 | */ |
| 1261 | static struct rpc_cred * |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 1262 | gss_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | { |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 1264 | return rpcauth_lookup_credcache(auth, acred, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | } |
| 1266 | |
| 1267 | static struct rpc_cred * |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 1268 | gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | { |
| 1270 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); |
| 1271 | struct gss_cred *cred = NULL; |
| 1272 | int err = -ENOMEM; |
| 1273 | |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1274 | dprintk("RPC: %s for uid %d, flavor %d\n", |
Eric W. Biederman | cdba321 | 2013-02-01 17:10:52 -0800 | [diff] [blame] | 1275 | __func__, from_kuid(&init_user_ns, acred->uid), |
| 1276 | auth->au_flavor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | |
Trond Myklebust | 0f38b87 | 2008-06-10 18:31:01 -0400 | [diff] [blame] | 1278 | if (!(cred = kzalloc(sizeof(*cred), GFP_NOFS))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | goto out_err; |
| 1280 | |
Trond Myklebust | 5fe4755 | 2007-06-23 19:55:31 -0400 | [diff] [blame] | 1281 | rpcauth_init_cred(&cred->gc_base, acred, auth, &gss_credops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | /* |
| 1283 | * Note: in order to force a call to call_refresh(), we deliberately |
| 1284 | * fail to flag the credential as RPCAUTH_CRED_UPTODATE. |
| 1285 | */ |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1286 | cred->gc_base.cr_flags = 1UL << RPCAUTH_CRED_NEW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | cred->gc_service = gss_auth->service; |
Trond Myklebust | 68c9715 | 2012-01-03 13:22:46 -0500 | [diff] [blame] | 1288 | cred->gc_principal = NULL; |
| 1289 | if (acred->machine_cred) |
| 1290 | cred->gc_principal = acred->principal; |
Trond Myklebust | 0285ed1 | 2007-06-27 14:29:12 -0400 | [diff] [blame] | 1291 | kref_get(&gss_auth->kref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | return &cred->gc_base; |
| 1293 | |
| 1294 | out_err: |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1295 | dprintk("RPC: %s failed with error %d\n", __func__, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | return ERR_PTR(err); |
| 1297 | } |
| 1298 | |
| 1299 | static int |
Trond Myklebust | fba3bad | 2006-02-01 12:19:27 -0500 | [diff] [blame] | 1300 | gss_cred_init(struct rpc_auth *auth, struct rpc_cred *cred) |
| 1301 | { |
| 1302 | struct gss_auth *gss_auth = container_of(auth, struct gss_auth, rpc_auth); |
| 1303 | struct gss_cred *gss_cred = container_of(cred,struct gss_cred, gc_base); |
| 1304 | int err; |
| 1305 | |
| 1306 | do { |
| 1307 | err = gss_create_upcall(gss_auth, gss_cred); |
| 1308 | } while (err == -EAGAIN); |
| 1309 | return err; |
| 1310 | } |
| 1311 | |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 1312 | /* |
| 1313 | * Returns -EACCES if GSS context is NULL or will expire within the |
| 1314 | * timeout (miliseconds) |
| 1315 | */ |
| 1316 | static int |
| 1317 | gss_key_timeout(struct rpc_cred *rc) |
| 1318 | { |
| 1319 | struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); |
| 1320 | unsigned long now = jiffies; |
| 1321 | unsigned long expire; |
| 1322 | |
| 1323 | if (gss_cred->gc_ctx == NULL) |
| 1324 | return -EACCES; |
| 1325 | |
| 1326 | expire = gss_cred->gc_ctx->gc_expiry - (gss_key_expire_timeo * HZ); |
| 1327 | |
| 1328 | if (time_after(now, expire)) |
| 1329 | return -EACCES; |
| 1330 | return 0; |
| 1331 | } |
| 1332 | |
Trond Myklebust | fba3bad | 2006-02-01 12:19:27 -0500 | [diff] [blame] | 1333 | static int |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 1334 | gss_match(struct auth_cred *acred, struct rpc_cred *rc, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | { |
| 1336 | struct gss_cred *gss_cred = container_of(rc, struct gss_cred, gc_base); |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 1337 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1339 | if (test_bit(RPCAUTH_CRED_NEW, &rc->cr_flags)) |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 1340 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | /* Don't match with creds that have expired. */ |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1342 | if (time_after(jiffies, gss_cred->gc_ctx->gc_expiry)) |
| 1343 | return 0; |
| 1344 | if (!test_bit(RPCAUTH_CRED_UPTODATE, &rc->cr_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | return 0; |
Trond Myklebust | 8a31776 | 2006-02-01 12:18:36 -0500 | [diff] [blame] | 1346 | out: |
Trond Myklebust | 68c9715 | 2012-01-03 13:22:46 -0500 | [diff] [blame] | 1347 | if (acred->principal != NULL) { |
| 1348 | if (gss_cred->gc_principal == NULL) |
| 1349 | return 0; |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 1350 | ret = strcmp(acred->principal, gss_cred->gc_principal) == 0; |
| 1351 | goto check_expire; |
Trond Myklebust | 68c9715 | 2012-01-03 13:22:46 -0500 | [diff] [blame] | 1352 | } |
| 1353 | if (gss_cred->gc_principal != NULL) |
Trond Myklebust | 7c67db3 | 2008-04-07 20:50:11 -0400 | [diff] [blame] | 1354 | return 0; |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 1355 | ret = uid_eq(rc->cr_uid, acred->uid); |
| 1356 | |
| 1357 | check_expire: |
| 1358 | if (ret == 0) |
| 1359 | return ret; |
| 1360 | |
| 1361 | /* Notify acred users of GSS context expiration timeout */ |
| 1362 | if (test_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags) && |
| 1363 | (gss_key_timeout(rc) != 0)) { |
| 1364 | /* test will now be done from generic cred */ |
| 1365 | test_and_clear_bit(RPC_CRED_NOTIFY_TIMEOUT, &acred->ac_flags); |
| 1366 | /* tell NFS layer that key will expire soon */ |
| 1367 | set_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags); |
| 1368 | } |
| 1369 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | } |
| 1371 | |
| 1372 | /* |
| 1373 | * Marshal credentials. |
| 1374 | * Maybe we should keep a cached credential for performance reasons. |
| 1375 | */ |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1376 | static __be32 * |
| 1377 | gss_marshal(struct rpc_task *task, __be32 *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1379 | struct rpc_rqst *req = task->tk_rqstp; |
| 1380 | struct rpc_cred *cred = req->rq_cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
| 1382 | gc_base); |
| 1383 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1384 | __be32 *cred_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | u32 maj_stat = 0; |
| 1386 | struct xdr_netobj mic; |
| 1387 | struct kvec iov; |
| 1388 | struct xdr_buf verf_buf; |
| 1389 | |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1390 | dprintk("RPC: %5u %s\n", task->tk_pid, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | |
| 1392 | *p++ = htonl(RPC_AUTH_GSS); |
| 1393 | cred_len = p++; |
| 1394 | |
| 1395 | spin_lock(&ctx->gc_seq_lock); |
| 1396 | req->rq_seqno = ctx->gc_seq++; |
| 1397 | spin_unlock(&ctx->gc_seq_lock); |
| 1398 | |
| 1399 | *p++ = htonl((u32) RPC_GSS_VERSION); |
| 1400 | *p++ = htonl((u32) ctx->gc_proc); |
| 1401 | *p++ = htonl((u32) req->rq_seqno); |
| 1402 | *p++ = htonl((u32) gss_cred->gc_service); |
| 1403 | p = xdr_encode_netobj(p, &ctx->gc_wire_ctx); |
| 1404 | *cred_len = htonl((p - (cred_len + 1)) << 2); |
| 1405 | |
| 1406 | /* We compute the checksum for the verifier over the xdr-encoded bytes |
| 1407 | * starting with the xid and ending at the end of the credential: */ |
Trond Myklebust | a4f0835 | 2013-01-08 09:10:21 -0500 | [diff] [blame] | 1408 | iov.iov_base = xprt_skip_transport_header(req->rq_xprt, |
Chuck Lever | 808012f | 2005-08-25 16:25:49 -0700 | [diff] [blame] | 1409 | req->rq_snd_buf.head[0].iov_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | iov.iov_len = (u8 *)p - (u8 *)iov.iov_base; |
| 1411 | xdr_buf_from_iov(&iov, &verf_buf); |
| 1412 | |
| 1413 | /* set verifier flavor*/ |
| 1414 | *p++ = htonl(RPC_AUTH_GSS); |
| 1415 | |
| 1416 | mic.data = (u8 *)(p + 1); |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 1417 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) { |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1419 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | } else if (maj_stat != 0) { |
| 1421 | printk("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat); |
| 1422 | goto out_put_ctx; |
| 1423 | } |
| 1424 | p = xdr_encode_opaque(p, NULL, mic.len); |
| 1425 | gss_put_ctx(ctx); |
| 1426 | return p; |
| 1427 | out_put_ctx: |
| 1428 | gss_put_ctx(ctx); |
| 1429 | return NULL; |
| 1430 | } |
| 1431 | |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1432 | static int gss_renew_cred(struct rpc_task *task) |
| 1433 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1434 | struct rpc_cred *oldcred = task->tk_rqstp->rq_cred; |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1435 | struct gss_cred *gss_cred = container_of(oldcred, |
| 1436 | struct gss_cred, |
| 1437 | gc_base); |
| 1438 | struct rpc_auth *auth = oldcred->cr_auth; |
| 1439 | struct auth_cred acred = { |
| 1440 | .uid = oldcred->cr_uid, |
Trond Myklebust | 68c9715 | 2012-01-03 13:22:46 -0500 | [diff] [blame] | 1441 | .principal = gss_cred->gc_principal, |
| 1442 | .machine_cred = (gss_cred->gc_principal != NULL ? 1 : 0), |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1443 | }; |
| 1444 | struct rpc_cred *new; |
| 1445 | |
| 1446 | new = gss_lookup_cred(auth, &acred, RPCAUTH_LOOKUP_NEW); |
| 1447 | if (IS_ERR(new)) |
| 1448 | return PTR_ERR(new); |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1449 | task->tk_rqstp->rq_cred = new; |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1450 | put_rpccred(oldcred); |
| 1451 | return 0; |
| 1452 | } |
| 1453 | |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 1454 | static int gss_cred_is_negative_entry(struct rpc_cred *cred) |
| 1455 | { |
| 1456 | if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { |
| 1457 | unsigned long now = jiffies; |
| 1458 | unsigned long begin, expire; |
| 1459 | struct gss_cred *gss_cred; |
| 1460 | |
| 1461 | gss_cred = container_of(cred, struct gss_cred, gc_base); |
| 1462 | begin = gss_cred->gc_upcall_timestamp; |
| 1463 | expire = begin + gss_expired_cred_retry_delay * HZ; |
| 1464 | |
| 1465 | if (time_in_range_open(now, begin, expire)) |
| 1466 | return 1; |
| 1467 | } |
| 1468 | return 0; |
| 1469 | } |
| 1470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | /* |
| 1472 | * Refresh credentials. XXX - finish |
| 1473 | */ |
| 1474 | static int |
| 1475 | gss_refresh(struct rpc_task *task) |
| 1476 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1477 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1478 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 1480 | if (gss_cred_is_negative_entry(cred)) |
| 1481 | return -EKEYEXPIRED; |
| 1482 | |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1483 | if (!test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) && |
| 1484 | !test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags)) { |
| 1485 | ret = gss_renew_cred(task); |
| 1486 | if (ret < 0) |
| 1487 | goto out; |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1488 | cred = task->tk_rqstp->rq_cred; |
Trond Myklebust | cd019f7 | 2008-04-17 17:03:58 -0400 | [diff] [blame] | 1489 | } |
| 1490 | |
| 1491 | if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)) |
| 1492 | ret = gss_refresh_upcall(task); |
| 1493 | out: |
| 1494 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | } |
| 1496 | |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1497 | /* Dummy refresh routine: used only when destroying the context */ |
| 1498 | static int |
| 1499 | gss_refresh_null(struct rpc_task *task) |
| 1500 | { |
| 1501 | return -EACCES; |
| 1502 | } |
| 1503 | |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1504 | static __be32 * |
| 1505 | gss_validate(struct rpc_task *task, __be32 *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1507 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1509 | __be32 seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | struct kvec iov; |
| 1511 | struct xdr_buf verf_buf; |
| 1512 | struct xdr_netobj mic; |
| 1513 | u32 flav,len; |
| 1514 | u32 maj_stat; |
Andy Adamson | 35fa5f7 | 2013-08-14 11:59:17 -0400 | [diff] [blame] | 1515 | __be32 *ret = ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1517 | dprintk("RPC: %5u %s\n", task->tk_pid, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | |
| 1519 | flav = ntohl(*p++); |
| 1520 | if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE) |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1521 | goto out_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | if (flav != RPC_AUTH_GSS) |
| 1523 | goto out_bad; |
| 1524 | seq = htonl(task->tk_rqstp->rq_seqno); |
| 1525 | iov.iov_base = &seq; |
| 1526 | iov.iov_len = sizeof(seq); |
| 1527 | xdr_buf_from_iov(&iov, &verf_buf); |
| 1528 | mic.data = (u8 *)p; |
| 1529 | mic.len = len; |
| 1530 | |
Andy Adamson | 35fa5f7 | 2013-08-14 11:59:17 -0400 | [diff] [blame] | 1531 | ret = ERR_PTR(-EACCES); |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 1532 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1534 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1535 | if (maj_stat) { |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1536 | dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n", |
| 1537 | task->tk_pid, __func__, maj_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | goto out_bad; |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1539 | } |
J. Bruce Fields | 24b2605 | 2005-10-13 16:54:53 -0400 | [diff] [blame] | 1540 | /* We leave it to unwrap to calculate au_rslack. For now we just |
| 1541 | * calculate the length of the verifier: */ |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 1542 | cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | gss_put_ctx(ctx); |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1544 | dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n", |
| 1545 | task->tk_pid, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | return p + XDR_QUADLEN(len); |
| 1547 | out_bad: |
| 1548 | gss_put_ctx(ctx); |
Andy Adamson | 35fa5f7 | 2013-08-14 11:59:17 -0400 | [diff] [blame] | 1549 | dprintk("RPC: %5u %s failed ret %ld.\n", task->tk_pid, __func__, |
| 1550 | PTR_ERR(ret)); |
| 1551 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | } |
| 1553 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1554 | static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, |
| 1555 | __be32 *p, void *obj) |
| 1556 | { |
| 1557 | struct xdr_stream xdr; |
| 1558 | |
| 1559 | xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); |
| 1560 | encode(rqstp, &xdr, obj); |
| 1561 | } |
| 1562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | static inline int |
| 1564 | gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1565 | kxdreproc_t encode, struct rpc_rqst *rqstp, |
| 1566 | __be32 *p, void *obj) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | { |
| 1568 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; |
| 1569 | struct xdr_buf integ_buf; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1570 | __be32 *integ_len = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | struct xdr_netobj mic; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1572 | u32 offset; |
| 1573 | __be32 *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | struct kvec *iov; |
| 1575 | u32 maj_stat = 0; |
| 1576 | int status = -EIO; |
| 1577 | |
| 1578 | integ_len = p++; |
| 1579 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; |
| 1580 | *p++ = htonl(rqstp->rq_seqno); |
| 1581 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1582 | gss_wrap_req_encode(encode, rqstp, p, obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | |
| 1584 | if (xdr_buf_subsegment(snd_buf, &integ_buf, |
| 1585 | offset, snd_buf->len - offset)) |
| 1586 | return status; |
| 1587 | *integ_len = htonl(integ_buf.len); |
| 1588 | |
| 1589 | /* guess whether we're in the head or the tail: */ |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1590 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | iov = snd_buf->tail; |
| 1592 | else |
| 1593 | iov = snd_buf->head; |
| 1594 | p = iov->iov_base + iov->iov_len; |
| 1595 | mic.data = (u8 *)(p + 1); |
| 1596 | |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 1597 | maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | status = -EIO; /* XXX? */ |
| 1599 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1600 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | else if (maj_stat) |
| 1602 | return status; |
| 1603 | q = xdr_encode_opaque(p, NULL, mic.len); |
| 1604 | |
| 1605 | offset = (u8 *)q - (u8 *)p; |
| 1606 | iov->iov_len += offset; |
| 1607 | snd_buf->len += offset; |
| 1608 | return 0; |
| 1609 | } |
| 1610 | |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1611 | static void |
| 1612 | priv_release_snd_buf(struct rpc_rqst *rqstp) |
| 1613 | { |
| 1614 | int i; |
| 1615 | |
| 1616 | for (i=0; i < rqstp->rq_enc_pages_num; i++) |
| 1617 | __free_page(rqstp->rq_enc_pages[i]); |
| 1618 | kfree(rqstp->rq_enc_pages); |
| 1619 | } |
| 1620 | |
| 1621 | static int |
| 1622 | alloc_enc_pages(struct rpc_rqst *rqstp) |
| 1623 | { |
| 1624 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; |
| 1625 | int first, last, i; |
| 1626 | |
| 1627 | if (snd_buf->page_len == 0) { |
| 1628 | rqstp->rq_enc_pages_num = 0; |
| 1629 | return 0; |
| 1630 | } |
| 1631 | |
| 1632 | first = snd_buf->page_base >> PAGE_CACHE_SHIFT; |
| 1633 | last = (snd_buf->page_base + snd_buf->page_len - 1) >> PAGE_CACHE_SHIFT; |
| 1634 | rqstp->rq_enc_pages_num = last - first + 1 + 1; |
| 1635 | rqstp->rq_enc_pages |
| 1636 | = kmalloc(rqstp->rq_enc_pages_num * sizeof(struct page *), |
| 1637 | GFP_NOFS); |
| 1638 | if (!rqstp->rq_enc_pages) |
| 1639 | goto out; |
| 1640 | for (i=0; i < rqstp->rq_enc_pages_num; i++) { |
| 1641 | rqstp->rq_enc_pages[i] = alloc_page(GFP_NOFS); |
| 1642 | if (rqstp->rq_enc_pages[i] == NULL) |
| 1643 | goto out_free; |
| 1644 | } |
| 1645 | rqstp->rq_release_snd_buf = priv_release_snd_buf; |
| 1646 | return 0; |
| 1647 | out_free: |
Trond Myklebust | cdead7c | 2010-03-19 15:36:22 -0400 | [diff] [blame] | 1648 | rqstp->rq_enc_pages_num = i; |
| 1649 | priv_release_snd_buf(rqstp); |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1650 | out: |
| 1651 | return -EAGAIN; |
| 1652 | } |
| 1653 | |
| 1654 | static inline int |
| 1655 | gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1656 | kxdreproc_t encode, struct rpc_rqst *rqstp, |
| 1657 | __be32 *p, void *obj) |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1658 | { |
| 1659 | struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; |
| 1660 | u32 offset; |
| 1661 | u32 maj_stat; |
| 1662 | int status; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1663 | __be32 *opaque_len; |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1664 | struct page **inpages; |
| 1665 | int first; |
| 1666 | int pad; |
| 1667 | struct kvec *iov; |
| 1668 | char *tmp; |
| 1669 | |
| 1670 | opaque_len = p++; |
| 1671 | offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base; |
| 1672 | *p++ = htonl(rqstp->rq_seqno); |
| 1673 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1674 | gss_wrap_req_encode(encode, rqstp, p, obj); |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1675 | |
| 1676 | status = alloc_enc_pages(rqstp); |
| 1677 | if (status) |
| 1678 | return status; |
| 1679 | first = snd_buf->page_base >> PAGE_CACHE_SHIFT; |
| 1680 | inpages = snd_buf->pages + first; |
| 1681 | snd_buf->pages = rqstp->rq_enc_pages; |
| 1682 | snd_buf->page_base -= first << PAGE_CACHE_SHIFT; |
Kevin Coffman | 7561042 | 2010-03-17 13:02:47 -0400 | [diff] [blame] | 1683 | /* |
| 1684 | * Give the tail its own page, in case we need extra space in the |
| 1685 | * head when wrapping: |
| 1686 | * |
| 1687 | * call_allocate() allocates twice the slack space required |
| 1688 | * by the authentication flavor to rq_callsize. |
| 1689 | * For GSS, slack is GSS_CRED_SLACK. |
| 1690 | */ |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1691 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) { |
| 1692 | tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]); |
| 1693 | memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len); |
| 1694 | snd_buf->tail[0].iov_base = tmp; |
| 1695 | } |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 1696 | maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages); |
Kevin Coffman | 7561042 | 2010-03-17 13:02:47 -0400 | [diff] [blame] | 1697 | /* slack space should prevent this ever happening: */ |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1698 | BUG_ON(snd_buf->len > snd_buf->buflen); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1699 | status = -EIO; |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1700 | /* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was |
| 1701 | * done anyway, so it's safe to put the request on the wire: */ |
| 1702 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1703 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1704 | else if (maj_stat) |
| 1705 | return status; |
| 1706 | |
| 1707 | *opaque_len = htonl(snd_buf->len - offset); |
| 1708 | /* guess whether we're in the head or the tail: */ |
| 1709 | if (snd_buf->page_len || snd_buf->tail[0].iov_len) |
| 1710 | iov = snd_buf->tail; |
| 1711 | else |
| 1712 | iov = snd_buf->head; |
| 1713 | p = iov->iov_base + iov->iov_len; |
| 1714 | pad = 3 - ((snd_buf->len - offset - 1) & 3); |
| 1715 | memset(p, 0, pad); |
| 1716 | iov->iov_len += pad; |
| 1717 | snd_buf->len += pad; |
| 1718 | |
| 1719 | return 0; |
| 1720 | } |
| 1721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | static int |
| 1723 | gss_wrap_req(struct rpc_task *task, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1724 | kxdreproc_t encode, void *rqstp, __be32 *p, void *obj) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1726 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
| 1728 | gc_base); |
| 1729 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
| 1730 | int status = -EIO; |
| 1731 | |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1732 | dprintk("RPC: %5u %s\n", task->tk_pid, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) { |
| 1734 | /* The spec seems a little ambiguous here, but I think that not |
| 1735 | * wrapping context destruction requests makes the most sense. |
| 1736 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1737 | gss_wrap_req_encode(encode, rqstp, p, obj); |
| 1738 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | goto out; |
| 1740 | } |
| 1741 | switch (gss_cred->gc_service) { |
Joe Perches | 89f0e4f | 2011-07-01 09:43:12 +0000 | [diff] [blame] | 1742 | case RPC_GSS_SVC_NONE: |
| 1743 | gss_wrap_req_encode(encode, rqstp, p, obj); |
| 1744 | status = 0; |
| 1745 | break; |
| 1746 | case RPC_GSS_SVC_INTEGRITY: |
| 1747 | status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj); |
| 1748 | break; |
| 1749 | case RPC_GSS_SVC_PRIVACY: |
| 1750 | status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj); |
| 1751 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | } |
| 1753 | out: |
| 1754 | gss_put_ctx(ctx); |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1755 | dprintk("RPC: %5u %s returning %d\n", task->tk_pid, __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | return status; |
| 1757 | } |
| 1758 | |
| 1759 | static inline int |
| 1760 | gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx, |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1761 | struct rpc_rqst *rqstp, __be32 **p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | { |
| 1763 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; |
| 1764 | struct xdr_buf integ_buf; |
| 1765 | struct xdr_netobj mic; |
| 1766 | u32 data_offset, mic_offset; |
| 1767 | u32 integ_len; |
| 1768 | u32 maj_stat; |
| 1769 | int status = -EIO; |
| 1770 | |
| 1771 | integ_len = ntohl(*(*p)++); |
| 1772 | if (integ_len & 3) |
| 1773 | return status; |
| 1774 | data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; |
| 1775 | mic_offset = integ_len + data_offset; |
| 1776 | if (mic_offset > rcv_buf->len) |
| 1777 | return status; |
| 1778 | if (ntohl(*(*p)++) != rqstp->rq_seqno) |
| 1779 | return status; |
| 1780 | |
| 1781 | if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, |
| 1782 | mic_offset - data_offset)) |
| 1783 | return status; |
| 1784 | |
| 1785 | if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset)) |
| 1786 | return status; |
| 1787 | |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 1788 | maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1790 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | if (maj_stat != GSS_S_COMPLETE) |
| 1792 | return status; |
| 1793 | return 0; |
| 1794 | } |
| 1795 | |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1796 | static inline int |
| 1797 | gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx, |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1798 | struct rpc_rqst *rqstp, __be32 **p) |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1799 | { |
| 1800 | struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf; |
| 1801 | u32 offset; |
| 1802 | u32 opaque_len; |
| 1803 | u32 maj_stat; |
| 1804 | int status = -EIO; |
| 1805 | |
| 1806 | opaque_len = ntohl(*(*p)++); |
| 1807 | offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base; |
| 1808 | if (offset + opaque_len > rcv_buf->len) |
| 1809 | return status; |
| 1810 | /* remove padding: */ |
| 1811 | rcv_buf->len = offset + opaque_len; |
| 1812 | |
J. Bruce Fields | 00fd6e1 | 2005-10-13 16:55:18 -0400 | [diff] [blame] | 1813 | maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf); |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1814 | if (maj_stat == GSS_S_CONTEXT_EXPIRED) |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 1815 | clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1816 | if (maj_stat != GSS_S_COMPLETE) |
| 1817 | return status; |
| 1818 | if (ntohl(*(*p)++) != rqstp->rq_seqno) |
| 1819 | return status; |
| 1820 | |
| 1821 | return 0; |
| 1822 | } |
| 1823 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1824 | static int |
| 1825 | gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, |
| 1826 | __be32 *p, void *obj) |
| 1827 | { |
| 1828 | struct xdr_stream xdr; |
| 1829 | |
| 1830 | xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); |
| 1831 | return decode(rqstp, &xdr, obj); |
| 1832 | } |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | static int |
| 1835 | gss_unwrap_resp(struct rpc_task *task, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1836 | kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 1838 | struct rpc_cred *cred = task->tk_rqstp->rq_cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | struct gss_cred *gss_cred = container_of(cred, struct gss_cred, |
| 1840 | gc_base); |
| 1841 | struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred); |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1842 | __be32 *savedp = p; |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1843 | struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head; |
| 1844 | int savedlen = head->iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | int status = -EIO; |
| 1846 | |
| 1847 | if (ctx->gc_proc != RPC_GSS_PROC_DATA) |
| 1848 | goto out_decode; |
| 1849 | switch (gss_cred->gc_service) { |
Joe Perches | 89f0e4f | 2011-07-01 09:43:12 +0000 | [diff] [blame] | 1850 | case RPC_GSS_SVC_NONE: |
| 1851 | break; |
| 1852 | case RPC_GSS_SVC_INTEGRITY: |
| 1853 | status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p); |
| 1854 | if (status) |
| 1855 | goto out; |
| 1856 | break; |
| 1857 | case RPC_GSS_SVC_PRIVACY: |
| 1858 | status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p); |
| 1859 | if (status) |
| 1860 | goto out; |
| 1861 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | } |
J. Bruce Fields | 24b2605 | 2005-10-13 16:54:53 -0400 | [diff] [blame] | 1863 | /* take into account extra slack for integrity and privacy cases: */ |
Trond Myklebust | 1be27f3 | 2007-06-27 14:29:04 -0400 | [diff] [blame] | 1864 | cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp) |
J. Bruce Fields | 2d2da60c | 2005-10-13 16:54:58 -0400 | [diff] [blame] | 1865 | + (savedlen - head->iov_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | out_decode: |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1867 | status = gss_unwrap_req_decode(decode, rqstp, p, obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | out: |
| 1869 | gss_put_ctx(ctx); |
Chuck Lever | 632f0d0 | 2012-09-14 17:23:43 -0400 | [diff] [blame] | 1870 | dprintk("RPC: %5u %s returning %d\n", |
| 1871 | task->tk_pid, __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | return status; |
| 1873 | } |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1874 | |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 1875 | static const struct rpc_authops authgss_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | .owner = THIS_MODULE, |
| 1877 | .au_flavor = RPC_AUTH_GSS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | .au_name = "RPCSEC_GSS", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | .create = gss_create, |
| 1880 | .destroy = gss_destroy, |
| 1881 | .lookup_cred = gss_lookup_cred, |
Stanislav Kinsbursky | 80df9d2 | 2012-01-11 19:18:17 +0400 | [diff] [blame] | 1882 | .crcreate = gss_create_cred, |
Chuck Lever | 6a1a1e3 | 2012-07-11 16:31:08 -0400 | [diff] [blame] | 1883 | .list_pseudoflavors = gss_mech_list_pseudoflavors, |
Chuck Lever | 9568c5e | 2013-03-16 15:54:43 -0400 | [diff] [blame] | 1884 | .info2flavor = gss_mech_info2flavor, |
Chuck Lever | a77c806 | 2013-03-16 15:55:10 -0400 | [diff] [blame] | 1885 | .flavor2info = gss_mech_flavor2info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | }; |
| 1887 | |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 1888 | static const struct rpc_credops gss_credops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | .cr_name = "AUTH_GSS", |
| 1890 | .crdestroy = gss_destroy_cred, |
Trond Myklebust | fba3bad | 2006-02-01 12:19:27 -0500 | [diff] [blame] | 1891 | .cr_init = gss_cred_init, |
Trond Myklebust | 5c69104 | 2008-03-12 16:21:07 -0400 | [diff] [blame] | 1892 | .crbind = rpcauth_generic_bind_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | .crmatch = gss_match, |
| 1894 | .crmarshal = gss_marshal, |
| 1895 | .crrefresh = gss_refresh, |
| 1896 | .crvalidate = gss_validate, |
| 1897 | .crwrap_req = gss_wrap_req, |
| 1898 | .crunwrap_resp = gss_unwrap_resp, |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 1899 | .crkey_timeout = gss_key_timeout, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | }; |
| 1901 | |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1902 | static const struct rpc_credops gss_nullops = { |
| 1903 | .cr_name = "AUTH_GSS", |
Jeff Layton | 6dcd392 | 2008-12-23 15:21:57 -0500 | [diff] [blame] | 1904 | .crdestroy = gss_destroy_nullcred, |
Trond Myklebust | 5c69104 | 2008-03-12 16:21:07 -0400 | [diff] [blame] | 1905 | .crbind = rpcauth_generic_bind_cred, |
Trond Myklebust | 0df7fb7 | 2007-06-26 17:04:57 -0400 | [diff] [blame] | 1906 | .crmatch = gss_match, |
| 1907 | .crmarshal = gss_marshal, |
| 1908 | .crrefresh = gss_refresh_null, |
| 1909 | .crvalidate = gss_validate, |
| 1910 | .crwrap_req = gss_wrap_req, |
| 1911 | .crunwrap_resp = gss_unwrap_resp, |
| 1912 | }; |
| 1913 | |
Trond Myklebust | b693ba4 | 2009-08-09 15:14:15 -0400 | [diff] [blame] | 1914 | static const struct rpc_pipe_ops gss_upcall_ops_v0 = { |
Peng Tao | c122515 | 2011-09-22 21:50:10 -0400 | [diff] [blame] | 1915 | .upcall = rpc_pipe_generic_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | .downcall = gss_pipe_downcall, |
| 1917 | .destroy_msg = gss_pipe_destroy_msg, |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 1918 | .open_pipe = gss_pipe_open_v0, |
| 1919 | .release_pipe = gss_pipe_release, |
| 1920 | }; |
| 1921 | |
Trond Myklebust | b693ba4 | 2009-08-09 15:14:15 -0400 | [diff] [blame] | 1922 | static const struct rpc_pipe_ops gss_upcall_ops_v1 = { |
Peng Tao | c122515 | 2011-09-22 21:50:10 -0400 | [diff] [blame] | 1923 | .upcall = rpc_pipe_generic_upcall, |
\"J. Bruce Fields\ | 34769fc | 2008-12-23 16:16:37 -0500 | [diff] [blame] | 1924 | .downcall = gss_pipe_downcall, |
| 1925 | .destroy_msg = gss_pipe_destroy_msg, |
| 1926 | .open_pipe = gss_pipe_open_v1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | .release_pipe = gss_pipe_release, |
| 1928 | }; |
| 1929 | |
Stanislav Kinsbursky | a1db410 | 2012-01-19 21:42:37 +0400 | [diff] [blame] | 1930 | static __net_init int rpcsec_gss_init_net(struct net *net) |
| 1931 | { |
| 1932 | return gss_svc_init_net(net); |
| 1933 | } |
| 1934 | |
| 1935 | static __net_exit void rpcsec_gss_exit_net(struct net *net) |
| 1936 | { |
| 1937 | gss_svc_shutdown_net(net); |
| 1938 | } |
| 1939 | |
| 1940 | static struct pernet_operations rpcsec_gss_net_ops = { |
| 1941 | .init = rpcsec_gss_init_net, |
| 1942 | .exit = rpcsec_gss_exit_net, |
| 1943 | }; |
| 1944 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | /* |
| 1946 | * Initialize RPCSEC_GSS module |
| 1947 | */ |
| 1948 | static int __init init_rpcsec_gss(void) |
| 1949 | { |
| 1950 | int err = 0; |
| 1951 | |
| 1952 | err = rpcauth_register(&authgss_ops); |
| 1953 | if (err) |
| 1954 | goto out; |
| 1955 | err = gss_svc_init(); |
| 1956 | if (err) |
| 1957 | goto out_unregister; |
Stanislav Kinsbursky | a1db410 | 2012-01-19 21:42:37 +0400 | [diff] [blame] | 1958 | err = register_pernet_subsys(&rpcsec_gss_net_ops); |
| 1959 | if (err) |
| 1960 | goto out_svc_exit; |
\"J. Bruce Fields\ | 79a3f20 | 2008-12-23 16:10:52 -0500 | [diff] [blame] | 1961 | rpc_init_wait_queue(&pipe_version_rpc_waitqueue, "gss pipe version"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | return 0; |
Stanislav Kinsbursky | a1db410 | 2012-01-19 21:42:37 +0400 | [diff] [blame] | 1963 | out_svc_exit: |
| 1964 | gss_svc_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | out_unregister: |
| 1966 | rpcauth_unregister(&authgss_ops); |
| 1967 | out: |
| 1968 | return err; |
| 1969 | } |
| 1970 | |
| 1971 | static void __exit exit_rpcsec_gss(void) |
| 1972 | { |
Stanislav Kinsbursky | a1db410 | 2012-01-19 21:42:37 +0400 | [diff] [blame] | 1973 | unregister_pernet_subsys(&rpcsec_gss_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | gss_svc_shutdown(); |
| 1975 | rpcauth_unregister(&authgss_ops); |
Jesper Dangaard Brouer | bf12691 | 2009-06-08 03:11:48 +0000 | [diff] [blame] | 1976 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | } |
| 1978 | |
Chuck Lever | 71afa85 | 2013-03-16 15:54:16 -0400 | [diff] [blame] | 1979 | MODULE_ALIAS("rpc-auth-6"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | MODULE_LICENSE("GPL"); |
Trond Myklebust | 126e216 | 2010-05-13 12:55:38 -0400 | [diff] [blame] | 1981 | module_param_named(expired_cred_retry_delay, |
| 1982 | gss_expired_cred_retry_delay, |
| 1983 | uint, 0644); |
| 1984 | MODULE_PARM_DESC(expired_cred_retry_delay, "Timeout (in seconds) until " |
| 1985 | "the RPC engine retries an expired credential"); |
| 1986 | |
Andy Adamson | 4de6caa | 2013-08-14 11:59:15 -0400 | [diff] [blame] | 1987 | module_param_named(key_expire_timeo, |
| 1988 | gss_key_expire_timeo, |
| 1989 | uint, 0644); |
| 1990 | MODULE_PARM_DESC(key_expire_timeo, "Time (in seconds) at the end of a " |
| 1991 | "credential keys lifetime where the NFS layer cleans up " |
| 1992 | "prior to key expiration"); |
| 1993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | module_init(init_rpcsec_gss) |
| 1995 | module_exit(exit_rpcsec_gss) |