Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/net/sunrpc/svc.c |
| 3 | * |
| 4 | * High-level RPC service routines |
| 5 | * |
| 6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 7 | * |
| 8 | * Multiple threads pools and NUMAisation |
| 9 | * Copyright (c) 2006 Silicon Graphics, Inc. |
| 10 | * by Greg Banks <gnb@melbourne.sgi.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <linux/linkage.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/net.h> |
| 17 | #include <linux/in.h> |
| 18 | #include <linux/mm.h> |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/module.h> |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 21 | #include <linux/kthread.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <linux/sunrpc/types.h> |
| 25 | #include <linux/sunrpc/xdr.h> |
| 26 | #include <linux/sunrpc/stats.h> |
| 27 | #include <linux/sunrpc/svcsock.h> |
| 28 | #include <linux/sunrpc/clnt.h> |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 29 | #include <linux/sunrpc/bc_xprt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Jeff Layton | 860a0d9 | 2014-10-28 14:24:12 -0400 | [diff] [blame] | 31 | #include <trace/events/sunrpc.h> |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define RPCDBG_FACILITY RPCDBG_SVCDSP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 35 | static void svc_unregister(const struct svc_serv *serv, struct net *net); |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 36 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 37 | #define svc_serv_is_pooled(serv) ((serv)->sv_function) |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | /* |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 40 | * Mode for mapping cpus to pools. |
| 41 | */ |
| 42 | enum { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 43 | SVC_POOL_AUTO = -1, /* choose one of the others */ |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 44 | SVC_POOL_GLOBAL, /* no mapping, just a single global pool |
| 45 | * (legacy & UP mode) */ |
| 46 | SVC_POOL_PERCPU, /* one pool per cpu */ |
| 47 | SVC_POOL_PERNODE /* one pool per numa node */ |
| 48 | }; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 49 | #define SVC_POOL_DEFAULT SVC_POOL_GLOBAL |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 50 | |
| 51 | /* |
| 52 | * Structure for mapping cpus to pools and vice versa. |
| 53 | * Setup once during sunrpc initialisation. |
| 54 | */ |
| 55 | static struct svc_pool_map { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 56 | int count; /* How many svc_servs use us */ |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 57 | int mode; /* Note: int not enum to avoid |
| 58 | * warnings about "enumeration value |
| 59 | * not handled in switch" */ |
| 60 | unsigned int npools; |
| 61 | unsigned int *pool_to; /* maps pool id to cpu or node */ |
| 62 | unsigned int *to_pool; /* maps cpu or node to pool id */ |
| 63 | } svc_pool_map = { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 64 | .count = 0, |
| 65 | .mode = SVC_POOL_DEFAULT |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 66 | }; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 67 | static DEFINE_MUTEX(svc_pool_map_mutex);/* protects svc_pool_map.count only */ |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 68 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 69 | static int |
| 70 | param_set_pool_mode(const char *val, struct kernel_param *kp) |
| 71 | { |
| 72 | int *ip = (int *)kp->arg; |
| 73 | struct svc_pool_map *m = &svc_pool_map; |
| 74 | int err; |
| 75 | |
| 76 | mutex_lock(&svc_pool_map_mutex); |
| 77 | |
| 78 | err = -EBUSY; |
| 79 | if (m->count) |
| 80 | goto out; |
| 81 | |
| 82 | err = 0; |
| 83 | if (!strncmp(val, "auto", 4)) |
| 84 | *ip = SVC_POOL_AUTO; |
| 85 | else if (!strncmp(val, "global", 6)) |
| 86 | *ip = SVC_POOL_GLOBAL; |
| 87 | else if (!strncmp(val, "percpu", 6)) |
| 88 | *ip = SVC_POOL_PERCPU; |
| 89 | else if (!strncmp(val, "pernode", 7)) |
| 90 | *ip = SVC_POOL_PERNODE; |
| 91 | else |
| 92 | err = -EINVAL; |
| 93 | |
| 94 | out: |
| 95 | mutex_unlock(&svc_pool_map_mutex); |
| 96 | return err; |
| 97 | } |
| 98 | |
| 99 | static int |
| 100 | param_get_pool_mode(char *buf, struct kernel_param *kp) |
| 101 | { |
| 102 | int *ip = (int *)kp->arg; |
| 103 | |
| 104 | switch (*ip) |
| 105 | { |
| 106 | case SVC_POOL_AUTO: |
| 107 | return strlcpy(buf, "auto", 20); |
| 108 | case SVC_POOL_GLOBAL: |
| 109 | return strlcpy(buf, "global", 20); |
| 110 | case SVC_POOL_PERCPU: |
| 111 | return strlcpy(buf, "percpu", 20); |
| 112 | case SVC_POOL_PERNODE: |
| 113 | return strlcpy(buf, "pernode", 20); |
| 114 | default: |
| 115 | return sprintf(buf, "%d", *ip); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | module_param_call(pool_mode, param_set_pool_mode, param_get_pool_mode, |
| 120 | &svc_pool_map.mode, 0644); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * Detect best pool mapping mode heuristically, |
| 124 | * according to the machine's topology. |
| 125 | */ |
| 126 | static int |
| 127 | svc_pool_map_choose_mode(void) |
| 128 | { |
| 129 | unsigned int node; |
| 130 | |
Christoph Lameter | 62bc62a | 2009-06-16 15:32:15 -0700 | [diff] [blame] | 131 | if (nr_online_nodes > 1) { |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 132 | /* |
| 133 | * Actually have multiple NUMA nodes, |
| 134 | * so split pools on NUMA node boundaries |
| 135 | */ |
| 136 | return SVC_POOL_PERNODE; |
| 137 | } |
| 138 | |
H Hartley Sweeten | 72c3368 | 2010-03-05 13:42:43 -0800 | [diff] [blame] | 139 | node = first_online_node; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 140 | if (nr_cpus_node(node) > 2) { |
| 141 | /* |
| 142 | * Non-trivial SMP, or CONFIG_NUMA on |
| 143 | * non-NUMA hardware, e.g. with a generic |
| 144 | * x86_64 kernel on Xeons. In this case we |
| 145 | * want to divide the pools on cpu boundaries. |
| 146 | */ |
| 147 | return SVC_POOL_PERCPU; |
| 148 | } |
| 149 | |
| 150 | /* default: one global pool */ |
| 151 | return SVC_POOL_GLOBAL; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * Allocate the to_pool[] and pool_to[] arrays. |
| 156 | * Returns 0 on success or an errno. |
| 157 | */ |
| 158 | static int |
| 159 | svc_pool_map_alloc_arrays(struct svc_pool_map *m, unsigned int maxpools) |
| 160 | { |
| 161 | m->to_pool = kcalloc(maxpools, sizeof(unsigned int), GFP_KERNEL); |
| 162 | if (!m->to_pool) |
| 163 | goto fail; |
| 164 | m->pool_to = kcalloc(maxpools, sizeof(unsigned int), GFP_KERNEL); |
| 165 | if (!m->pool_to) |
| 166 | goto fail_free; |
| 167 | |
| 168 | return 0; |
| 169 | |
| 170 | fail_free: |
| 171 | kfree(m->to_pool); |
J. Bruce Fields | 61c8504 | 2011-12-22 18:22:49 -0700 | [diff] [blame] | 172 | m->to_pool = NULL; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 173 | fail: |
| 174 | return -ENOMEM; |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * Initialise the pool map for SVC_POOL_PERCPU mode. |
| 179 | * Returns number of pools or <0 on error. |
| 180 | */ |
| 181 | static int |
| 182 | svc_pool_map_init_percpu(struct svc_pool_map *m) |
| 183 | { |
Christoph Lameter | 53b8a31 | 2007-02-20 13:57:51 -0800 | [diff] [blame] | 184 | unsigned int maxpools = nr_cpu_ids; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 185 | unsigned int pidx = 0; |
| 186 | unsigned int cpu; |
| 187 | int err; |
| 188 | |
| 189 | err = svc_pool_map_alloc_arrays(m, maxpools); |
| 190 | if (err) |
| 191 | return err; |
| 192 | |
| 193 | for_each_online_cpu(cpu) { |
| 194 | BUG_ON(pidx > maxpools); |
| 195 | m->to_pool[cpu] = pidx; |
| 196 | m->pool_to[pidx] = cpu; |
| 197 | pidx++; |
| 198 | } |
| 199 | /* cpus brought online later all get mapped to pool0, sorry */ |
| 200 | |
| 201 | return pidx; |
| 202 | }; |
| 203 | |
| 204 | |
| 205 | /* |
| 206 | * Initialise the pool map for SVC_POOL_PERNODE mode. |
| 207 | * Returns number of pools or <0 on error. |
| 208 | */ |
| 209 | static int |
| 210 | svc_pool_map_init_pernode(struct svc_pool_map *m) |
| 211 | { |
Christoph Lameter | 74c7aa8 | 2007-02-20 13:57:51 -0800 | [diff] [blame] | 212 | unsigned int maxpools = nr_node_ids; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 213 | unsigned int pidx = 0; |
| 214 | unsigned int node; |
| 215 | int err; |
| 216 | |
| 217 | err = svc_pool_map_alloc_arrays(m, maxpools); |
| 218 | if (err) |
| 219 | return err; |
| 220 | |
| 221 | for_each_node_with_cpus(node) { |
| 222 | /* some architectures (e.g. SN2) have cpuless nodes */ |
| 223 | BUG_ON(pidx > maxpools); |
| 224 | m->to_pool[node] = pidx; |
| 225 | m->pool_to[pidx] = node; |
| 226 | pidx++; |
| 227 | } |
| 228 | /* nodes brought online later all get mapped to pool0, sorry */ |
| 229 | |
| 230 | return pidx; |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 235 | * Add a reference to the global map of cpus to pools (and |
| 236 | * vice versa). Initialise the map if we're the first user. |
| 237 | * Returns the number of pools. |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 238 | */ |
| 239 | static unsigned int |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 240 | svc_pool_map_get(void) |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 241 | { |
| 242 | struct svc_pool_map *m = &svc_pool_map; |
| 243 | int npools = -1; |
| 244 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 245 | mutex_lock(&svc_pool_map_mutex); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 246 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 247 | if (m->count++) { |
| 248 | mutex_unlock(&svc_pool_map_mutex); |
| 249 | return m->npools; |
| 250 | } |
| 251 | |
| 252 | if (m->mode == SVC_POOL_AUTO) |
| 253 | m->mode = svc_pool_map_choose_mode(); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 254 | |
| 255 | switch (m->mode) { |
| 256 | case SVC_POOL_PERCPU: |
| 257 | npools = svc_pool_map_init_percpu(m); |
| 258 | break; |
| 259 | case SVC_POOL_PERNODE: |
| 260 | npools = svc_pool_map_init_pernode(m); |
| 261 | break; |
| 262 | } |
| 263 | |
| 264 | if (npools < 0) { |
| 265 | /* default, or memory allocation failure */ |
| 266 | npools = 1; |
| 267 | m->mode = SVC_POOL_GLOBAL; |
| 268 | } |
| 269 | m->npools = npools; |
| 270 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 271 | mutex_unlock(&svc_pool_map_mutex); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 272 | return m->npools; |
| 273 | } |
| 274 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 275 | |
| 276 | /* |
| 277 | * Drop a reference to the global map of cpus to pools. |
| 278 | * When the last reference is dropped, the map data is |
| 279 | * freed; this allows the sysadmin to change the pool |
| 280 | * mode using the pool_mode module option without |
| 281 | * rebooting or re-loading sunrpc.ko. |
| 282 | */ |
| 283 | static void |
| 284 | svc_pool_map_put(void) |
| 285 | { |
| 286 | struct svc_pool_map *m = &svc_pool_map; |
| 287 | |
| 288 | mutex_lock(&svc_pool_map_mutex); |
| 289 | |
| 290 | if (!--m->count) { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 291 | kfree(m->to_pool); |
J. Bruce Fields | 61c8504 | 2011-12-22 18:22:49 -0700 | [diff] [blame] | 292 | m->to_pool = NULL; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 293 | kfree(m->pool_to); |
J. Bruce Fields | 61c8504 | 2011-12-22 18:22:49 -0700 | [diff] [blame] | 294 | m->pool_to = NULL; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 295 | m->npools = 0; |
| 296 | } |
| 297 | |
| 298 | mutex_unlock(&svc_pool_map_mutex); |
| 299 | } |
| 300 | |
| 301 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 302 | static int svc_pool_map_get_node(unsigned int pidx) |
| 303 | { |
| 304 | const struct svc_pool_map *m = &svc_pool_map; |
| 305 | |
| 306 | if (m->count) { |
| 307 | if (m->mode == SVC_POOL_PERCPU) |
| 308 | return cpu_to_node(m->pool_to[pidx]); |
| 309 | if (m->mode == SVC_POOL_PERNODE) |
| 310 | return m->pool_to[pidx]; |
| 311 | } |
| 312 | return NUMA_NO_NODE; |
| 313 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 314 | /* |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 315 | * Set the given thread's cpus_allowed mask so that it |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 316 | * will only run on cpus in the given pool. |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 317 | */ |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 318 | static inline void |
| 319 | svc_pool_map_set_cpumask(struct task_struct *task, unsigned int pidx) |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 320 | { |
| 321 | struct svc_pool_map *m = &svc_pool_map; |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 322 | unsigned int node = m->pool_to[pidx]; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 323 | |
| 324 | /* |
| 325 | * The caller checks for sv_nrpools > 1, which |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 326 | * implies that we've been initialized. |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 327 | */ |
Weston Andros Adamson | 1bd58aa | 2012-10-23 10:43:38 -0400 | [diff] [blame] | 328 | WARN_ON_ONCE(m->count == 0); |
| 329 | if (m->count == 0) |
| 330 | return; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 331 | |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 332 | switch (m->mode) { |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 333 | case SVC_POOL_PERCPU: |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 334 | { |
Rusty Russell | aa85ea5 | 2009-03-30 22:05:15 -0600 | [diff] [blame] | 335 | set_cpus_allowed_ptr(task, cpumask_of(node)); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 336 | break; |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 337 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 338 | case SVC_POOL_PERNODE: |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 339 | { |
Rusty Russell | a70f730 | 2009-03-13 14:49:46 +1030 | [diff] [blame] | 340 | set_cpus_allowed_ptr(task, cpumask_of_node(node)); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 341 | break; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 342 | } |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 343 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | /* |
| 347 | * Use the mapping mode to choose a pool for a given CPU. |
| 348 | * Used when enqueueing an incoming RPC. Always returns |
| 349 | * a non-NULL pool pointer. |
| 350 | */ |
| 351 | struct svc_pool * |
| 352 | svc_pool_for_cpu(struct svc_serv *serv, int cpu) |
| 353 | { |
| 354 | struct svc_pool_map *m = &svc_pool_map; |
| 355 | unsigned int pidx = 0; |
| 356 | |
| 357 | /* |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 358 | * An uninitialised map happens in a pure client when |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 359 | * lockd is brought up, so silently treat it the |
| 360 | * same as SVC_POOL_GLOBAL. |
| 361 | */ |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 362 | if (svc_serv_is_pooled(serv)) { |
| 363 | switch (m->mode) { |
| 364 | case SVC_POOL_PERCPU: |
| 365 | pidx = m->to_pool[cpu]; |
| 366 | break; |
| 367 | case SVC_POOL_PERNODE: |
| 368 | pidx = m->to_pool[cpu_to_node(cpu)]; |
| 369 | break; |
| 370 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 371 | } |
| 372 | return &serv->sv_pools[pidx % serv->sv_nrpools]; |
| 373 | } |
| 374 | |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 375 | int svc_rpcb_setup(struct svc_serv *serv, struct net *net) |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 376 | { |
| 377 | int err; |
| 378 | |
Stanislav Kinsbursky | bee42f68 | 2012-01-13 14:02:56 +0400 | [diff] [blame] | 379 | err = rpcb_create_local(net); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 380 | if (err) |
| 381 | return err; |
| 382 | |
| 383 | /* Remove any stale portmap registrations */ |
Stanislav Kinsbursky | bee42f68 | 2012-01-13 14:02:56 +0400 | [diff] [blame] | 384 | svc_unregister(serv, net); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 385 | return 0; |
| 386 | } |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 387 | EXPORT_SYMBOL_GPL(svc_rpcb_setup); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 388 | |
Stanislav Kinsbursky | 5ecebb7 | 2012-01-13 14:03:04 +0400 | [diff] [blame] | 389 | void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net) |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 390 | { |
Stanislav Kinsbursky | 5ecebb7 | 2012-01-13 14:03:04 +0400 | [diff] [blame] | 391 | svc_unregister(serv, net); |
| 392 | rpcb_put_local(net); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 393 | } |
Stanislav Kinsbursky | 16d0587 | 2011-10-25 14:17:28 +0300 | [diff] [blame] | 394 | EXPORT_SYMBOL_GPL(svc_rpcb_cleanup); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 395 | |
| 396 | static int svc_uses_rpcbind(struct svc_serv *serv) |
| 397 | { |
| 398 | struct svc_program *progp; |
| 399 | unsigned int i; |
| 400 | |
| 401 | for (progp = serv->sv_program; progp; progp = progp->pg_next) { |
| 402 | for (i = 0; i < progp->pg_nvers; i++) { |
| 403 | if (progp->pg_vers[i] == NULL) |
| 404 | continue; |
| 405 | if (progp->pg_vers[i]->vs_hidden == 0) |
| 406 | return 1; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | return 0; |
| 411 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 412 | |
Stanislav Kinsbursky | 9793f7c | 2012-05-02 16:08:38 +0400 | [diff] [blame] | 413 | int svc_bind(struct svc_serv *serv, struct net *net) |
| 414 | { |
| 415 | if (!svc_uses_rpcbind(serv)) |
| 416 | return 0; |
| 417 | return svc_rpcb_setup(serv, net); |
| 418 | } |
| 419 | EXPORT_SYMBOL_GPL(svc_bind); |
| 420 | |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 421 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | * Create an RPC service |
| 423 | */ |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 424 | static struct svc_serv * |
| 425 | __svc_create(struct svc_program *prog, unsigned int bufsize, int npools, |
Stanislav Kinsbursky | 5ecebb7 | 2012-01-13 14:03:04 +0400 | [diff] [blame] | 426 | void (*shutdown)(struct svc_serv *serv, struct net *net)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | struct svc_serv *serv; |
Chuck Lever | ea339d4 | 2007-10-26 13:32:56 -0400 | [diff] [blame] | 429 | unsigned int vers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | unsigned int xdrsize; |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 431 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 433 | if (!(serv = kzalloc(sizeof(*serv), GFP_KERNEL))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return NULL; |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 435 | serv->sv_name = prog->pg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | serv->sv_program = prog; |
| 437 | serv->sv_nrthreads = 1; |
| 438 | serv->sv_stats = prog->pg_stats; |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 439 | if (bufsize > RPCSVC_MAXPAYLOAD) |
| 440 | bufsize = RPCSVC_MAXPAYLOAD; |
| 441 | serv->sv_max_payload = bufsize? bufsize : 4096; |
| 442 | serv->sv_max_mesg = roundup(serv->sv_max_payload + PAGE_SIZE, PAGE_SIZE); |
NeilBrown | bc591cc | 2006-10-02 02:17:44 -0700 | [diff] [blame] | 443 | serv->sv_shutdown = shutdown; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | xdrsize = 0; |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 445 | while (prog) { |
| 446 | prog->pg_lovers = prog->pg_nvers-1; |
| 447 | for (vers=0; vers<prog->pg_nvers ; vers++) |
| 448 | if (prog->pg_vers[vers]) { |
| 449 | prog->pg_hivers = vers; |
| 450 | if (prog->pg_lovers > vers) |
| 451 | prog->pg_lovers = vers; |
| 452 | if (prog->pg_vers[vers]->vs_xdrsize > xdrsize) |
| 453 | xdrsize = prog->pg_vers[vers]->vs_xdrsize; |
| 454 | } |
| 455 | prog = prog->pg_next; |
| 456 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | serv->sv_xdrsize = xdrsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | INIT_LIST_HEAD(&serv->sv_tempsocks); |
| 459 | INIT_LIST_HEAD(&serv->sv_permsocks); |
Greg Banks | 36bdfc8 | 2006-10-02 02:17:54 -0700 | [diff] [blame] | 460 | init_timer(&serv->sv_temptimer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | spin_lock_init(&serv->sv_lock); |
| 462 | |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 463 | serv->sv_nrpools = npools; |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 464 | serv->sv_pools = |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 465 | kcalloc(serv->sv_nrpools, sizeof(struct svc_pool), |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 466 | GFP_KERNEL); |
| 467 | if (!serv->sv_pools) { |
| 468 | kfree(serv); |
| 469 | return NULL; |
| 470 | } |
| 471 | |
| 472 | for (i = 0; i < serv->sv_nrpools; i++) { |
| 473 | struct svc_pool *pool = &serv->sv_pools[i]; |
| 474 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 475 | dprintk("svc: initialising pool %u for %s\n", |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 476 | i, serv->sv_name); |
| 477 | |
| 478 | pool->sp_id = i; |
| 479 | INIT_LIST_HEAD(&pool->sp_threads); |
| 480 | INIT_LIST_HEAD(&pool->sp_sockets); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 481 | INIT_LIST_HEAD(&pool->sp_all_threads); |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 482 | spin_lock_init(&pool->sp_lock); |
| 483 | } |
| 484 | |
Stanislav Kinsbursky | 9793f7c | 2012-05-02 16:08:38 +0400 | [diff] [blame] | 485 | if (svc_uses_rpcbind(serv) && (!serv->sv_shutdown)) |
| 486 | serv->sv_shutdown = svc_rpcb_cleanup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | return serv; |
| 489 | } |
| 490 | |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 491 | struct svc_serv * |
| 492 | svc_create(struct svc_program *prog, unsigned int bufsize, |
Stanislav Kinsbursky | 5ecebb7 | 2012-01-13 14:03:04 +0400 | [diff] [blame] | 493 | void (*shutdown)(struct svc_serv *serv, struct net *net)) |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 494 | { |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 495 | return __svc_create(prog, bufsize, /*npools*/1, shutdown); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 496 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 497 | EXPORT_SYMBOL_GPL(svc_create); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 498 | |
| 499 | struct svc_serv * |
| 500 | svc_create_pooled(struct svc_program *prog, unsigned int bufsize, |
Stanislav Kinsbursky | 5ecebb7 | 2012-01-13 14:03:04 +0400 | [diff] [blame] | 501 | void (*shutdown)(struct svc_serv *serv, struct net *net), |
Jeff Layton | a75c5d0 | 2008-06-10 08:40:39 -0400 | [diff] [blame] | 502 | svc_thread_fn func, struct module *mod) |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 503 | { |
| 504 | struct svc_serv *serv; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 505 | unsigned int npools = svc_pool_map_get(); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 506 | |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 507 | serv = __svc_create(prog, bufsize, npools, shutdown); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 508 | |
| 509 | if (serv != NULL) { |
| 510 | serv->sv_function = func; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 511 | serv->sv_module = mod; |
| 512 | } |
| 513 | |
| 514 | return serv; |
| 515 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 516 | EXPORT_SYMBOL_GPL(svc_create_pooled); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 517 | |
Stanislav Kinsbursky | 074d0f6 | 2012-01-31 14:09:25 +0400 | [diff] [blame] | 518 | void svc_shutdown_net(struct svc_serv *serv, struct net *net) |
| 519 | { |
Stanislav Kinsbursky | 074d0f6 | 2012-01-31 14:09:25 +0400 | [diff] [blame] | 520 | svc_close_net(serv, net); |
| 521 | |
| 522 | if (serv->sv_shutdown) |
| 523 | serv->sv_shutdown(serv, net); |
| 524 | } |
| 525 | EXPORT_SYMBOL_GPL(svc_shutdown_net); |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /* |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 528 | * Destroy an RPC service. Should be called with appropriate locking to |
| 529 | * protect the sv_nrthreads, sv_permsocks and sv_tempsocks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | */ |
| 531 | void |
| 532 | svc_destroy(struct svc_serv *serv) |
| 533 | { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 534 | dprintk("svc: svc_destroy(%s, %d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | serv->sv_program->pg_name, |
| 536 | serv->sv_nrthreads); |
| 537 | |
| 538 | if (serv->sv_nrthreads) { |
| 539 | if (--(serv->sv_nrthreads) != 0) { |
| 540 | svc_sock_update_bufs(serv); |
| 541 | return; |
| 542 | } |
| 543 | } else |
| 544 | printk("svc_destroy: no threads for serv=%p!\n", serv); |
| 545 | |
Greg Banks | 36bdfc8 | 2006-10-02 02:17:54 -0700 | [diff] [blame] | 546 | del_timer_sync(&serv->sv_temptimer); |
Stanislav Kinsbursky | 074d0f6 | 2012-01-31 14:09:25 +0400 | [diff] [blame] | 547 | |
Stanislav Kinsbursky | 7b147f1 | 2012-01-31 14:09:17 +0400 | [diff] [blame] | 548 | /* |
| 549 | * The last user is gone and thus all sockets have to be destroyed to |
| 550 | * the point. Check this. |
| 551 | */ |
| 552 | BUG_ON(!list_empty(&serv->sv_permsocks)); |
| 553 | BUG_ON(!list_empty(&serv->sv_tempsocks)); |
NeilBrown | cda1fd4 | 2007-03-06 01:42:22 -0800 | [diff] [blame] | 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | cache_clean_deferred(serv); |
| 556 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 557 | if (svc_serv_is_pooled(serv)) |
| 558 | svc_pool_map_put(); |
| 559 | |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 560 | kfree(serv->sv_pools); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | kfree(serv); |
| 562 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 563 | EXPORT_SYMBOL_GPL(svc_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | /* |
| 566 | * Allocate an RPC server's buffer space. |
| 567 | * We allocate pages and place them in rq_argpages. |
| 568 | */ |
| 569 | static int |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 570 | svc_init_buffer(struct svc_rqst *rqstp, unsigned int size, int node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | { |
Chuck Lever | 0dc220f | 2008-04-14 12:27:52 -0400 | [diff] [blame] | 572 | unsigned int pages, arghi; |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 573 | |
Andy Adamson | ba17686 | 2010-01-26 21:24:04 -0500 | [diff] [blame] | 574 | /* bc_xprt uses fore channel allocated buffers */ |
| 575 | if (svc_is_backchannel(rqstp)) |
| 576 | return 1; |
| 577 | |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 578 | pages = size / PAGE_SIZE + 1; /* extra page as we hold both request and reply. |
| 579 | * We assume one is at most one page |
| 580 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | arghi = 0; |
Weston Andros Adamson | b25cd05 | 2012-10-23 10:43:41 -0400 | [diff] [blame] | 582 | WARN_ON_ONCE(pages > RPCSVC_MAXPAGES); |
| 583 | if (pages > RPCSVC_MAXPAGES) |
| 584 | pages = RPCSVC_MAXPAGES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | while (pages) { |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 586 | struct page *p = alloc_pages_node(node, GFP_KERNEL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | if (!p) |
| 588 | break; |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 589 | rqstp->rq_pages[arghi++] = p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | pages--; |
| 591 | } |
Chuck Lever | 0dc220f | 2008-04-14 12:27:52 -0400 | [diff] [blame] | 592 | return pages == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } |
| 594 | |
| 595 | /* |
| 596 | * Release an RPC server buffer |
| 597 | */ |
| 598 | static void |
| 599 | svc_release_buffer(struct svc_rqst *rqstp) |
| 600 | { |
Chuck Lever | 50c8bb1 | 2008-04-14 12:27:45 -0400 | [diff] [blame] | 601 | unsigned int i; |
| 602 | |
| 603 | for (i = 0; i < ARRAY_SIZE(rqstp->rq_pages); i++) |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 604 | if (rqstp->rq_pages[i]) |
| 605 | put_page(rqstp->rq_pages[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } |
| 607 | |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 608 | struct svc_rqst * |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 609 | svc_prepare_thread(struct svc_serv *serv, struct svc_pool *pool, int node) |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 610 | { |
| 611 | struct svc_rqst *rqstp; |
| 612 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 613 | rqstp = kzalloc_node(sizeof(*rqstp), GFP_KERNEL, node); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 614 | if (!rqstp) |
| 615 | goto out_enomem; |
| 616 | |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 617 | serv->sv_nrthreads++; |
| 618 | spin_lock_bh(&pool->sp_lock); |
| 619 | pool->sp_nrthreads++; |
| 620 | list_add(&rqstp->rq_all, &pool->sp_all_threads); |
| 621 | spin_unlock_bh(&pool->sp_lock); |
| 622 | rqstp->rq_server = serv; |
| 623 | rqstp->rq_pool = pool; |
| 624 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 625 | rqstp->rq_argp = kmalloc_node(serv->sv_xdrsize, GFP_KERNEL, node); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 626 | if (!rqstp->rq_argp) |
| 627 | goto out_thread; |
| 628 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 629 | rqstp->rq_resp = kmalloc_node(serv->sv_xdrsize, GFP_KERNEL, node); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 630 | if (!rqstp->rq_resp) |
| 631 | goto out_thread; |
| 632 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 633 | if (!svc_init_buffer(rqstp, serv->sv_max_mesg, node)) |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 634 | goto out_thread; |
| 635 | |
| 636 | return rqstp; |
| 637 | out_thread: |
| 638 | svc_exit_thread(rqstp); |
| 639 | out_enomem: |
| 640 | return ERR_PTR(-ENOMEM); |
| 641 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 642 | EXPORT_SYMBOL_GPL(svc_prepare_thread); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | /* |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 645 | * Choose a pool in which to create a new thread, for svc_set_num_threads |
| 646 | */ |
| 647 | static inline struct svc_pool * |
| 648 | choose_pool(struct svc_serv *serv, struct svc_pool *pool, unsigned int *state) |
| 649 | { |
| 650 | if (pool != NULL) |
| 651 | return pool; |
| 652 | |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 653 | return &serv->sv_pools[(*state)++ % serv->sv_nrpools]; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | /* |
| 657 | * Choose a thread to kill, for svc_set_num_threads |
| 658 | */ |
| 659 | static inline struct task_struct * |
| 660 | choose_victim(struct svc_serv *serv, struct svc_pool *pool, unsigned int *state) |
| 661 | { |
| 662 | unsigned int i; |
| 663 | struct task_struct *task = NULL; |
| 664 | |
| 665 | if (pool != NULL) { |
| 666 | spin_lock_bh(&pool->sp_lock); |
| 667 | } else { |
| 668 | /* choose a pool in round-robin fashion */ |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 669 | for (i = 0; i < serv->sv_nrpools; i++) { |
| 670 | pool = &serv->sv_pools[--(*state) % serv->sv_nrpools]; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 671 | spin_lock_bh(&pool->sp_lock); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 672 | if (!list_empty(&pool->sp_all_threads)) |
| 673 | goto found_pool; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 674 | spin_unlock_bh(&pool->sp_lock); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 675 | } |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 676 | return NULL; |
| 677 | } |
| 678 | |
| 679 | found_pool: |
| 680 | if (!list_empty(&pool->sp_all_threads)) { |
| 681 | struct svc_rqst *rqstp; |
| 682 | |
| 683 | /* |
| 684 | * Remove from the pool->sp_all_threads list |
| 685 | * so we don't try to kill it again. |
| 686 | */ |
| 687 | rqstp = list_entry(pool->sp_all_threads.next, struct svc_rqst, rq_all); |
| 688 | list_del_init(&rqstp->rq_all); |
| 689 | task = rqstp->rq_task; |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 690 | } |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 691 | spin_unlock_bh(&pool->sp_lock); |
| 692 | |
| 693 | return task; |
| 694 | } |
| 695 | |
| 696 | /* |
| 697 | * Create or destroy enough new threads to make the number |
| 698 | * of threads the given number. If `pool' is non-NULL, applies |
| 699 | * only to threads in that pool, otherwise round-robins between |
J. Bruce Fields | 94cf317 | 2011-12-01 17:51:21 -0500 | [diff] [blame] | 700 | * all pools. Caller must ensure that mutual exclusion between this and |
| 701 | * server startup or shutdown. |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 702 | * |
| 703 | * Destroying threads relies on the service threads filling in |
| 704 | * rqstp->rq_task, which only the nfs ones do. Assumes the serv |
| 705 | * has been created using svc_create_pooled(). |
| 706 | * |
| 707 | * Based on code that used to be in nfsd_svc() but tweaked |
| 708 | * to be pool-aware. |
| 709 | */ |
| 710 | int |
| 711 | svc_set_num_threads(struct svc_serv *serv, struct svc_pool *pool, int nrservs) |
| 712 | { |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 713 | struct svc_rqst *rqstp; |
| 714 | struct task_struct *task; |
| 715 | struct svc_pool *chosen_pool; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 716 | int error = 0; |
| 717 | unsigned int state = serv->sv_nrthreads-1; |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 718 | int node; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 719 | |
| 720 | if (pool == NULL) { |
| 721 | /* The -1 assumes caller has done a svc_get() */ |
| 722 | nrservs -= (serv->sv_nrthreads-1); |
| 723 | } else { |
| 724 | spin_lock_bh(&pool->sp_lock); |
| 725 | nrservs -= pool->sp_nrthreads; |
| 726 | spin_unlock_bh(&pool->sp_lock); |
| 727 | } |
| 728 | |
| 729 | /* create new threads */ |
| 730 | while (nrservs > 0) { |
| 731 | nrservs--; |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 732 | chosen_pool = choose_pool(serv, pool, &state); |
| 733 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 734 | node = svc_pool_map_get_node(chosen_pool->sp_id); |
| 735 | rqstp = svc_prepare_thread(serv, chosen_pool, node); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 736 | if (IS_ERR(rqstp)) { |
| 737 | error = PTR_ERR(rqstp); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 738 | break; |
| 739 | } |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 740 | |
| 741 | __module_get(serv->sv_module); |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 742 | task = kthread_create_on_node(serv->sv_function, rqstp, |
Kees Cook | f170168 | 2013-07-03 15:04:58 -0700 | [diff] [blame] | 743 | node, "%s", serv->sv_name); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 744 | if (IS_ERR(task)) { |
| 745 | error = PTR_ERR(task); |
| 746 | module_put(serv->sv_module); |
| 747 | svc_exit_thread(rqstp); |
| 748 | break; |
| 749 | } |
| 750 | |
| 751 | rqstp->rq_task = task; |
| 752 | if (serv->sv_nrpools > 1) |
| 753 | svc_pool_map_set_cpumask(task, chosen_pool->sp_id); |
| 754 | |
| 755 | svc_sock_update_bufs(serv); |
| 756 | wake_up_process(task); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 757 | } |
| 758 | /* destroy old threads */ |
| 759 | while (nrservs < 0 && |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 760 | (task = choose_victim(serv, pool, &state)) != NULL) { |
Jeff Layton | a75c5d0 | 2008-06-10 08:40:39 -0400 | [diff] [blame] | 761 | send_sig(SIGINT, task, 1); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 762 | nrservs++; |
| 763 | } |
| 764 | |
| 765 | return error; |
| 766 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 767 | EXPORT_SYMBOL_GPL(svc_set_num_threads); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 768 | |
| 769 | /* |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 770 | * Called from a server thread as it's exiting. Caller must hold the BKL or |
| 771 | * the "service mutex", whichever is appropriate for the service. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | */ |
| 773 | void |
| 774 | svc_exit_thread(struct svc_rqst *rqstp) |
| 775 | { |
| 776 | struct svc_serv *serv = rqstp->rq_server; |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 777 | struct svc_pool *pool = rqstp->rq_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
| 779 | svc_release_buffer(rqstp); |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 780 | kfree(rqstp->rq_resp); |
| 781 | kfree(rqstp->rq_argp); |
| 782 | kfree(rqstp->rq_auth_data); |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 783 | |
| 784 | spin_lock_bh(&pool->sp_lock); |
| 785 | pool->sp_nrthreads--; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 786 | list_del(&rqstp->rq_all); |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 787 | spin_unlock_bh(&pool->sp_lock); |
| 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | kfree(rqstp); |
| 790 | |
| 791 | /* Release the server */ |
| 792 | if (serv) |
| 793 | svc_destroy(serv); |
| 794 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 795 | EXPORT_SYMBOL_GPL(svc_exit_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
| 797 | /* |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 798 | * Register an "inet" protocol family netid with the local |
| 799 | * rpcbind daemon via an rpcbind v4 SET request. |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 800 | * |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 801 | * No netconfig infrastructure is available in the kernel, so |
| 802 | * we map IP_ protocol numbers to netids by hand. |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 803 | * |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 804 | * Returns zero on success; a negative errno value is returned |
| 805 | * if any error occurs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 807 | static int __svc_rpcb_register4(struct net *net, const u32 program, |
| 808 | const u32 version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 809 | const unsigned short protocol, |
| 810 | const unsigned short port) |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 811 | { |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 812 | const struct sockaddr_in sin = { |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 813 | .sin_family = AF_INET, |
| 814 | .sin_addr.s_addr = htonl(INADDR_ANY), |
| 815 | .sin_port = htons(port), |
| 816 | }; |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 817 | const char *netid; |
| 818 | int error; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 819 | |
| 820 | switch (protocol) { |
| 821 | case IPPROTO_UDP: |
| 822 | netid = RPCBIND_NETID_UDP; |
| 823 | break; |
| 824 | case IPPROTO_TCP: |
| 825 | netid = RPCBIND_NETID_TCP; |
| 826 | break; |
| 827 | default: |
Chuck Lever | ba5c35e | 2009-03-18 20:46:59 -0400 | [diff] [blame] | 828 | return -ENOPROTOOPT; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 829 | } |
| 830 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 831 | error = rpcb_v4_register(net, program, version, |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 832 | (const struct sockaddr *)&sin, netid); |
| 833 | |
| 834 | /* |
| 835 | * User space didn't support rpcbind v4, so retry this |
| 836 | * registration request with the legacy rpcbind v2 protocol. |
| 837 | */ |
| 838 | if (error == -EPROTONOSUPPORT) |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 839 | error = rpcb_register(net, program, version, protocol, port); |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 840 | |
| 841 | return error; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 842 | } |
| 843 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 844 | #if IS_ENABLED(CONFIG_IPV6) |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 845 | /* |
| 846 | * Register an "inet6" protocol family netid with the local |
| 847 | * rpcbind daemon via an rpcbind v4 SET request. |
| 848 | * |
| 849 | * No netconfig infrastructure is available in the kernel, so |
| 850 | * we map IP_ protocol numbers to netids by hand. |
| 851 | * |
| 852 | * Returns zero on success; a negative errno value is returned |
| 853 | * if any error occurs. |
| 854 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 855 | static int __svc_rpcb_register6(struct net *net, const u32 program, |
| 856 | const u32 version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 857 | const unsigned short protocol, |
| 858 | const unsigned short port) |
| 859 | { |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 860 | const struct sockaddr_in6 sin6 = { |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 861 | .sin6_family = AF_INET6, |
| 862 | .sin6_addr = IN6ADDR_ANY_INIT, |
| 863 | .sin6_port = htons(port), |
| 864 | }; |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 865 | const char *netid; |
| 866 | int error; |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 867 | |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 868 | switch (protocol) { |
| 869 | case IPPROTO_UDP: |
| 870 | netid = RPCBIND_NETID_UDP6; |
| 871 | break; |
| 872 | case IPPROTO_TCP: |
| 873 | netid = RPCBIND_NETID_TCP6; |
| 874 | break; |
| 875 | default: |
Chuck Lever | ba5c35e | 2009-03-18 20:46:59 -0400 | [diff] [blame] | 876 | return -ENOPROTOOPT; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 877 | } |
| 878 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 879 | error = rpcb_v4_register(net, program, version, |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 880 | (const struct sockaddr *)&sin6, netid); |
| 881 | |
| 882 | /* |
| 883 | * User space didn't support rpcbind version 4, so we won't |
| 884 | * use a PF_INET6 listener. |
| 885 | */ |
| 886 | if (error == -EPROTONOSUPPORT) |
| 887 | error = -EAFNOSUPPORT; |
| 888 | |
| 889 | return error; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 890 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 891 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 892 | |
| 893 | /* |
| 894 | * Register a kernel RPC service via rpcbind version 4. |
| 895 | * |
| 896 | * Returns zero on success; a negative errno value is returned |
| 897 | * if any error occurs. |
| 898 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 899 | static int __svc_register(struct net *net, const char *progname, |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 900 | const u32 program, const u32 version, |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 901 | const int family, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 902 | const unsigned short protocol, |
| 903 | const unsigned short port) |
| 904 | { |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 905 | int error = -EAFNOSUPPORT; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 906 | |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 907 | switch (family) { |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 908 | case PF_INET: |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 909 | error = __svc_rpcb_register4(net, program, version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 910 | protocol, port); |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 911 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 912 | #if IS_ENABLED(CONFIG_IPV6) |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 913 | case PF_INET6: |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 914 | error = __svc_rpcb_register6(net, program, version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 915 | protocol, port); |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 916 | #endif |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 917 | } |
| 918 | |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 919 | return error; |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 920 | } |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 921 | |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 922 | /** |
| 923 | * svc_register - register an RPC service with the local portmapper |
| 924 | * @serv: svc_serv struct for the service to register |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 925 | * @net: net namespace for the service to register |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 926 | * @family: protocol family of service's listener socket |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 927 | * @proto: transport protocol number to advertise |
| 928 | * @port: port to advertise |
| 929 | * |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 930 | * Service is registered for any address in the passed-in protocol family |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 931 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 932 | int svc_register(const struct svc_serv *serv, struct net *net, |
| 933 | const int family, const unsigned short proto, |
| 934 | const unsigned short port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | { |
| 936 | struct svc_program *progp; |
Kinglong Mee | 7e55b59 | 2013-12-31 13:17:20 +0800 | [diff] [blame] | 937 | struct svc_version *vers; |
Chuck Lever | ea339d4 | 2007-10-26 13:32:56 -0400 | [diff] [blame] | 938 | unsigned int i; |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 939 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
Weston Andros Adamson | 0af3950 | 2012-10-23 10:43:45 -0400 | [diff] [blame] | 941 | WARN_ON_ONCE(proto == 0 && port == 0); |
| 942 | if (proto == 0 && port == 0) |
| 943 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 945 | for (progp = serv->sv_program; progp; progp = progp->pg_next) { |
| 946 | for (i = 0; i < progp->pg_nvers; i++) { |
Kinglong Mee | 7e55b59 | 2013-12-31 13:17:20 +0800 | [diff] [blame] | 947 | vers = progp->pg_vers[i]; |
| 948 | if (vers == NULL) |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 949 | continue; |
| 950 | |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 951 | dprintk("svc: svc_register(%sv%d, %s, %u, %u)%s\n", |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 952 | progp->pg_name, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 953 | i, |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 954 | proto == IPPROTO_UDP? "udp" : "tcp", |
| 955 | port, |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 956 | family, |
Kinglong Mee | 7e55b59 | 2013-12-31 13:17:20 +0800 | [diff] [blame] | 957 | vers->vs_hidden ? |
| 958 | " (but not telling portmap)" : ""); |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 959 | |
Kinglong Mee | 7e55b59 | 2013-12-31 13:17:20 +0800 | [diff] [blame] | 960 | if (vers->vs_hidden) |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 961 | continue; |
| 962 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 963 | error = __svc_register(net, progp->pg_name, progp->pg_prog, |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 964 | i, family, proto, port); |
Kinglong Mee | 7e55b59 | 2013-12-31 13:17:20 +0800 | [diff] [blame] | 965 | |
| 966 | if (vers->vs_rpcb_optnl) { |
| 967 | error = 0; |
| 968 | continue; |
| 969 | } |
| 970 | |
| 971 | if (error < 0) { |
| 972 | printk(KERN_WARNING "svc: failed to register " |
| 973 | "%sv%u RPC service (errno %d).\n", |
| 974 | progp->pg_name, i, -error); |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 975 | break; |
Kinglong Mee | 7e55b59 | 2013-12-31 13:17:20 +0800 | [diff] [blame] | 976 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | } |
| 979 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 980 | return error; |
| 981 | } |
| 982 | |
Chuck Lever | d5a8620 | 2009-03-18 20:47:29 -0400 | [diff] [blame] | 983 | /* |
| 984 | * If user space is running rpcbind, it should take the v4 UNSET |
| 985 | * and clear everything for this [program, version]. If user space |
| 986 | * is running portmap, it will reject the v4 UNSET, but won't have |
| 987 | * any "inet6" entries anyway. So a PMAP_UNSET should be sufficient |
| 988 | * in this case to clear all existing entries for [program, version]. |
| 989 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 990 | static void __svc_unregister(struct net *net, const u32 program, const u32 version, |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 991 | const char *progname) |
| 992 | { |
| 993 | int error; |
| 994 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 995 | error = rpcb_v4_register(net, program, version, NULL, ""); |
Chuck Lever | d5a8620 | 2009-03-18 20:47:29 -0400 | [diff] [blame] | 996 | |
| 997 | /* |
| 998 | * User space didn't support rpcbind v4, so retry this |
| 999 | * request with the legacy rpcbind v2 protocol. |
| 1000 | */ |
| 1001 | if (error == -EPROTONOSUPPORT) |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 1002 | error = rpcb_register(net, program, version, 0, 0); |
Chuck Lever | d5a8620 | 2009-03-18 20:47:29 -0400 | [diff] [blame] | 1003 | |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 1004 | dprintk("svc: %s(%sv%u), error %d\n", |
| 1005 | __func__, progname, version, error); |
| 1006 | } |
| 1007 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1008 | /* |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 1009 | * All netids, bind addresses and ports registered for [program, version] |
| 1010 | * are removed from the local rpcbind database (if the service is not |
| 1011 | * hidden) to make way for a new instance of the service. |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1012 | * |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 1013 | * The result of unregistration is reported via dprintk for those who want |
| 1014 | * verification of the result, but is otherwise not important. |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1015 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 1016 | static void svc_unregister(const struct svc_serv *serv, struct net *net) |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1017 | { |
| 1018 | struct svc_program *progp; |
| 1019 | unsigned long flags; |
| 1020 | unsigned int i; |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1021 | |
| 1022 | clear_thread_flag(TIF_SIGPENDING); |
| 1023 | |
| 1024 | for (progp = serv->sv_program; progp; progp = progp->pg_next) { |
| 1025 | for (i = 0; i < progp->pg_nvers; i++) { |
| 1026 | if (progp->pg_vers[i] == NULL) |
| 1027 | continue; |
| 1028 | if (progp->pg_vers[i]->vs_hidden) |
| 1029 | continue; |
| 1030 | |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 1031 | dprintk("svc: attempting to unregister %sv%u\n", |
| 1032 | progp->pg_name, i); |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame] | 1033 | __svc_unregister(net, progp->pg_prog, i, progp->pg_name); |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1034 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | } |
| 1036 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1037 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 1038 | recalc_sigpending(); |
| 1039 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | } |
| 1041 | |
| 1042 | /* |
J. Bruce Fields | 7032a3d | 2012-10-09 18:33:38 -0400 | [diff] [blame] | 1043 | * dprintk the given error with the address of the client that caused it. |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1044 | */ |
J. Bruce Fields | 624ab46 | 2013-01-08 16:22:15 -0500 | [diff] [blame] | 1045 | #ifdef RPC_DEBUG |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 1046 | static __printf(2, 3) |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1047 | void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...) |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1048 | { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1049 | struct va_format vaf; |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1050 | va_list args; |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1051 | char buf[RPC_MAX_ADDRBUFLEN]; |
| 1052 | |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1053 | va_start(args, fmt); |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1054 | |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1055 | vaf.fmt = fmt; |
| 1056 | vaf.va = &args; |
| 1057 | |
J. Bruce Fields | 7032a3d | 2012-10-09 18:33:38 -0400 | [diff] [blame] | 1058 | dprintk("svc: %s: %pV", svc_print_addr(rqstp, buf, sizeof(buf)), &vaf); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1059 | |
| 1060 | va_end(args); |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1061 | } |
J. Bruce Fields | 624ab46 | 2013-01-08 16:22:15 -0500 | [diff] [blame] | 1062 | #else |
| 1063 | static __printf(2,3) void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...) {} |
| 1064 | #endif |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1065 | |
| 1066 | /* |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1067 | * Common routine for processing the RPC request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | */ |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1069 | static int |
| 1070 | svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | { |
| 1072 | struct svc_program *progp; |
| 1073 | struct svc_version *versp = NULL; /* compiler food */ |
| 1074 | struct svc_procedure *procp = NULL; |
NeilBrown | 6fb2b47 | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1075 | struct svc_serv *serv = rqstp->rq_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | kxdrproc_t xdr; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1077 | __be32 *statp; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1078 | u32 prog, vers, proc; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1079 | __be32 auth_stat, rpc_stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | int auth_res; |
J.Bruce Fields | 8f8e05c | 2006-10-04 02:16:08 -0700 | [diff] [blame] | 1081 | __be32 *reply_statp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
| 1083 | rpc_stat = rpc_success; |
| 1084 | |
| 1085 | if (argv->iov_len < 6*4) |
| 1086 | goto err_short_len; |
| 1087 | |
J. Bruce Fields | 5c04c46 | 2006-06-30 01:56:19 -0700 | [diff] [blame] | 1088 | /* Will be turned off only in gss privacy case: */ |
Kinglong Mee | f15a5cf | 2014-06-10 18:29:39 +0800 | [diff] [blame] | 1089 | rqstp->rq_splice_ok = true; |
Andy Adamson | 2f42587 | 2009-04-03 08:27:32 +0300 | [diff] [blame] | 1090 | /* Will be turned off only when NFSv4 Sessions are used */ |
Kinglong Mee | f15a5cf | 2014-06-10 18:29:39 +0800 | [diff] [blame] | 1091 | rqstp->rq_usedeferral = true; |
J. Bruce Fields | 9e701c6 | 2011-01-02 21:56:36 -0500 | [diff] [blame] | 1092 | rqstp->rq_dropme = false; |
Tom Tucker | e831fe6 | 2007-12-30 21:07:29 -0600 | [diff] [blame] | 1093 | |
| 1094 | /* Setup reply header */ |
| 1095 | rqstp->rq_xprt->xpt_ops->xpo_prep_reply_hdr(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | svc_putu32(resv, rqstp->rq_xid); |
| 1098 | |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1099 | vers = svc_getnl(argv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
| 1101 | /* First words of reply: */ |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1102 | svc_putnl(resv, 1); /* REPLY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | if (vers != 2) /* RPC version number */ |
| 1105 | goto err_bad_rpc; |
| 1106 | |
| 1107 | /* Save position in case we later decide to reject: */ |
J.Bruce Fields | 8f8e05c | 2006-10-04 02:16:08 -0700 | [diff] [blame] | 1108 | reply_statp = resv->iov_base + resv->iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1110 | svc_putnl(resv, 0); /* ACCEPT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1112 | rqstp->rq_prog = prog = svc_getnl(argv); /* program number */ |
| 1113 | rqstp->rq_vers = vers = svc_getnl(argv); /* version number */ |
| 1114 | rqstp->rq_proc = proc = svc_getnl(argv); /* procedure number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | |
NeilBrown | 80d188a | 2005-11-07 01:00:27 -0800 | [diff] [blame] | 1116 | for (progp = serv->sv_program; progp; progp = progp->pg_next) |
| 1117 | if (prog == progp->pg_prog) |
| 1118 | break; |
| 1119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | /* |
| 1121 | * Decode auth data, and add verifier to reply buffer. |
| 1122 | * We do this before anything else in order to get a decent |
| 1123 | * auth verifier. |
| 1124 | */ |
| 1125 | auth_res = svc_authenticate(rqstp, &auth_stat); |
| 1126 | /* Also give the program a chance to reject this call: */ |
NeilBrown | 80d188a | 2005-11-07 01:00:27 -0800 | [diff] [blame] | 1127 | if (auth_res == SVC_OK && progp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | auth_stat = rpc_autherr_badcred; |
| 1129 | auth_res = progp->pg_authenticate(rqstp); |
| 1130 | } |
| 1131 | switch (auth_res) { |
| 1132 | case SVC_OK: |
| 1133 | break; |
| 1134 | case SVC_GARBAGE: |
Harshula Jayasuriya | dd35210 | 2008-02-20 10:56:56 +1100 | [diff] [blame] | 1135 | goto err_garbage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | case SVC_SYSERR: |
| 1137 | rpc_stat = rpc_system_err; |
| 1138 | goto err_bad; |
| 1139 | case SVC_DENIED: |
| 1140 | goto err_bad_auth; |
NeilBrown | 1ebede8 | 2010-08-12 17:04:07 +1000 | [diff] [blame] | 1141 | case SVC_CLOSE: |
| 1142 | if (test_bit(XPT_TEMP, &rqstp->rq_xprt->xpt_flags)) |
| 1143 | svc_close_xprt(rqstp->rq_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | case SVC_DROP: |
| 1145 | goto dropit; |
| 1146 | case SVC_COMPLETE: |
| 1147 | goto sendit; |
| 1148 | } |
NeilBrown | 80d188a | 2005-11-07 01:00:27 -0800 | [diff] [blame] | 1149 | |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 1150 | if (progp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | goto err_bad_prog; |
| 1152 | |
| 1153 | if (vers >= progp->pg_nvers || |
| 1154 | !(versp = progp->pg_vers[vers])) |
| 1155 | goto err_bad_vers; |
| 1156 | |
| 1157 | procp = versp->vs_proc + proc; |
| 1158 | if (proc >= versp->vs_nproc || !procp->pc_func) |
| 1159 | goto err_bad_proc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | rqstp->rq_procinfo = procp; |
| 1161 | |
| 1162 | /* Syntactic check complete */ |
| 1163 | serv->sv_stats->rpccnt++; |
| 1164 | |
| 1165 | /* Build the reply header. */ |
| 1166 | statp = resv->iov_base +resv->iov_len; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1167 | svc_putnl(resv, RPC_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | |
| 1169 | /* Bump per-procedure stats counter */ |
| 1170 | procp->pc_count++; |
| 1171 | |
| 1172 | /* Initialize storage for argp and resp */ |
| 1173 | memset(rqstp->rq_argp, 0, procp->pc_argsize); |
| 1174 | memset(rqstp->rq_resp, 0, procp->pc_ressize); |
| 1175 | |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1176 | /* un-reserve some of the out-queue now that we have a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | * better idea of reply size |
| 1178 | */ |
| 1179 | if (procp->pc_xdrressize) |
Jeff Layton | cd12301 | 2007-05-09 02:34:50 -0700 | [diff] [blame] | 1180 | svc_reserve_auth(rqstp, procp->pc_xdrressize<<2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
| 1182 | /* Call the function that processes the request. */ |
| 1183 | if (!versp->vs_dispatch) { |
| 1184 | /* Decode arguments */ |
| 1185 | xdr = procp->pc_decode; |
| 1186 | if (xdr && !xdr(rqstp, argv->iov_base, rqstp->rq_argp)) |
| 1187 | goto err_garbage; |
| 1188 | |
| 1189 | *statp = procp->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp); |
| 1190 | |
| 1191 | /* Encode reply */ |
J. Bruce Fields | 9e701c6 | 2011-01-02 21:56:36 -0500 | [diff] [blame] | 1192 | if (rqstp->rq_dropme) { |
NeilBrown | d343fce | 2006-10-17 00:10:18 -0700 | [diff] [blame] | 1193 | if (procp->pc_release) |
| 1194 | procp->pc_release(rqstp, NULL, rqstp->rq_resp); |
| 1195 | goto dropit; |
| 1196 | } |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1197 | if (*statp == rpc_success && |
| 1198 | (xdr = procp->pc_encode) && |
| 1199 | !xdr(rqstp, resv->iov_base+resv->iov_len, rqstp->rq_resp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | dprintk("svc: failed to encode reply\n"); |
| 1201 | /* serv->sv_stats->rpcsystemerr++; */ |
| 1202 | *statp = rpc_system_err; |
| 1203 | } |
| 1204 | } else { |
| 1205 | dprintk("svc: calling dispatcher\n"); |
| 1206 | if (!versp->vs_dispatch(rqstp, statp)) { |
| 1207 | /* Release reply info */ |
| 1208 | if (procp->pc_release) |
| 1209 | procp->pc_release(rqstp, NULL, rqstp->rq_resp); |
| 1210 | goto dropit; |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | /* Check RPC status result */ |
| 1215 | if (*statp != rpc_success) |
| 1216 | resv->iov_len = ((void*)statp) - resv->iov_base + 4; |
| 1217 | |
| 1218 | /* Release reply info */ |
| 1219 | if (procp->pc_release) |
| 1220 | procp->pc_release(rqstp, NULL, rqstp->rq_resp); |
| 1221 | |
| 1222 | if (procp->pc_encode == NULL) |
| 1223 | goto dropit; |
| 1224 | |
| 1225 | sendit: |
| 1226 | if (svc_authorise(rqstp)) |
| 1227 | goto dropit; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1228 | return 1; /* Caller can now send it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | |
| 1230 | dropit: |
| 1231 | svc_authorise(rqstp); /* doesn't hurt to call this twice */ |
| 1232 | dprintk("svc: svc_process dropit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | return 0; |
| 1234 | |
| 1235 | err_short_len: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1236 | svc_printk(rqstp, "short len %Zd, dropping request\n", |
| 1237 | argv->iov_len); |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | goto dropit; /* drop request */ |
| 1240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | err_bad_rpc: |
| 1242 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1243 | svc_putnl(resv, 1); /* REJECT */ |
| 1244 | svc_putnl(resv, 0); /* RPC_MISMATCH */ |
| 1245 | svc_putnl(resv, 2); /* Only RPCv2 supported */ |
| 1246 | svc_putnl(resv, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | goto sendit; |
| 1248 | |
| 1249 | err_bad_auth: |
| 1250 | dprintk("svc: authentication failed (%d)\n", ntohl(auth_stat)); |
| 1251 | serv->sv_stats->rpcbadauth++; |
| 1252 | /* Restore write pointer to location of accept status: */ |
J.Bruce Fields | 8f8e05c | 2006-10-04 02:16:08 -0700 | [diff] [blame] | 1253 | xdr_ressize_check(rqstp, reply_statp); |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1254 | svc_putnl(resv, 1); /* REJECT */ |
| 1255 | svc_putnl(resv, 1); /* AUTH_ERROR */ |
| 1256 | svc_putnl(resv, ntohl(auth_stat)); /* status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | goto sendit; |
| 1258 | |
| 1259 | err_bad_prog: |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 1260 | dprintk("svc: unknown program %d\n", prog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1262 | svc_putnl(resv, RPC_PROG_UNAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | goto sendit; |
| 1264 | |
| 1265 | err_bad_vers: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1266 | svc_printk(rqstp, "unknown version (%d for prog %d, %s)\n", |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1267 | vers, prog, progp->pg_name); |
| 1268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1270 | svc_putnl(resv, RPC_PROG_MISMATCH); |
| 1271 | svc_putnl(resv, progp->pg_lovers); |
| 1272 | svc_putnl(resv, progp->pg_hivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | goto sendit; |
| 1274 | |
| 1275 | err_bad_proc: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1276 | svc_printk(rqstp, "unknown procedure (%d)\n", proc); |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1279 | svc_putnl(resv, RPC_PROC_UNAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | goto sendit; |
| 1281 | |
| 1282 | err_garbage: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1283 | svc_printk(rqstp, "failed to decode args\n"); |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | rpc_stat = rpc_garbage_args; |
| 1286 | err_bad: |
| 1287 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1288 | svc_putnl(resv, ntohl(rpc_stat)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | goto sendit; |
| 1290 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 1291 | EXPORT_SYMBOL_GPL(svc_process); |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1292 | |
| 1293 | /* |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1294 | * Process the RPC request. |
| 1295 | */ |
| 1296 | int |
| 1297 | svc_process(struct svc_rqst *rqstp) |
| 1298 | { |
| 1299 | struct kvec *argv = &rqstp->rq_arg.head[0]; |
| 1300 | struct kvec *resv = &rqstp->rq_res.head[0]; |
| 1301 | struct svc_serv *serv = rqstp->rq_server; |
| 1302 | u32 dir; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1303 | |
| 1304 | /* |
| 1305 | * Setup response xdr_buf. |
| 1306 | * Initially it has just one page |
| 1307 | */ |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 1308 | rqstp->rq_next_page = &rqstp->rq_respages[1]; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1309 | resv->iov_base = page_address(rqstp->rq_respages[0]); |
| 1310 | resv->iov_len = 0; |
| 1311 | rqstp->rq_res.pages = rqstp->rq_respages + 1; |
| 1312 | rqstp->rq_res.len = 0; |
| 1313 | rqstp->rq_res.page_base = 0; |
| 1314 | rqstp->rq_res.page_len = 0; |
| 1315 | rqstp->rq_res.buflen = PAGE_SIZE; |
| 1316 | rqstp->rq_res.tail[0].iov_base = NULL; |
| 1317 | rqstp->rq_res.tail[0].iov_len = 0; |
| 1318 | |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1319 | dir = svc_getnl(argv); |
| 1320 | if (dir != 0) { |
| 1321 | /* direction != CALL */ |
| 1322 | svc_printk(rqstp, "bad direction %d, dropping request\n", dir); |
| 1323 | serv->sv_stats->rpcbadfmt++; |
Jeff Layton | 860a0d9 | 2014-10-28 14:24:12 -0400 | [diff] [blame] | 1324 | goto out_drop; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1325 | } |
| 1326 | |
Andy Adamson | 4b5b3ba | 2011-01-06 02:04:24 +0000 | [diff] [blame] | 1327 | /* Returns 1 for send, 0 for drop */ |
Jeff Layton | 860a0d9 | 2014-10-28 14:24:12 -0400 | [diff] [blame] | 1328 | if (likely(svc_process_common(rqstp, argv, resv))) { |
| 1329 | int ret = svc_send(rqstp); |
| 1330 | |
| 1331 | trace_svc_process(rqstp, ret); |
| 1332 | return ret; |
Andy Adamson | 4b5b3ba | 2011-01-06 02:04:24 +0000 | [diff] [blame] | 1333 | } |
Jeff Layton | 860a0d9 | 2014-10-28 14:24:12 -0400 | [diff] [blame] | 1334 | out_drop: |
| 1335 | trace_svc_process(rqstp, 0); |
| 1336 | svc_drop(rqstp); |
| 1337 | return 0; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1338 | } |
| 1339 | |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 1340 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1341 | /* |
| 1342 | * Process a backchannel RPC request that arrived over an existing |
| 1343 | * outbound connection |
| 1344 | */ |
| 1345 | int |
| 1346 | bc_svc_process(struct svc_serv *serv, struct rpc_rqst *req, |
| 1347 | struct svc_rqst *rqstp) |
| 1348 | { |
| 1349 | struct kvec *argv = &rqstp->rq_arg.head[0]; |
| 1350 | struct kvec *resv = &rqstp->rq_res.head[0]; |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1351 | |
| 1352 | /* Build the svc_rqst used by the common processing routine */ |
Andy Adamson | 4a19de0 | 2011-01-06 02:04:35 +0000 | [diff] [blame] | 1353 | rqstp->rq_xprt = serv->sv_bc_xprt; |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1354 | rqstp->rq_xid = req->rq_xid; |
| 1355 | rqstp->rq_prot = req->rq_xprt->prot; |
| 1356 | rqstp->rq_server = serv; |
| 1357 | |
| 1358 | rqstp->rq_addrlen = sizeof(req->rq_xprt->addr); |
| 1359 | memcpy(&rqstp->rq_addr, &req->rq_xprt->addr, rqstp->rq_addrlen); |
| 1360 | memcpy(&rqstp->rq_arg, &req->rq_rcv_buf, sizeof(rqstp->rq_arg)); |
| 1361 | memcpy(&rqstp->rq_res, &req->rq_snd_buf, sizeof(rqstp->rq_res)); |
| 1362 | |
| 1363 | /* reset result send buffer "put" position */ |
| 1364 | resv->iov_len = 0; |
| 1365 | |
| 1366 | if (rqstp->rq_prot != IPPROTO_TCP) { |
| 1367 | printk(KERN_ERR "No support for Non-TCP transports!\n"); |
| 1368 | BUG(); |
| 1369 | } |
| 1370 | |
| 1371 | /* |
| 1372 | * Skip the next two words because they've already been |
| 1373 | * processed in the trasport |
| 1374 | */ |
| 1375 | svc_getu32(argv); /* XID */ |
| 1376 | svc_getnl(argv); /* CALLDIR */ |
| 1377 | |
Andy Adamson | 4b5b3ba | 2011-01-06 02:04:24 +0000 | [diff] [blame] | 1378 | /* Returns 1 for send, 0 for drop */ |
| 1379 | if (svc_process_common(rqstp, argv, resv)) { |
| 1380 | memcpy(&req->rq_snd_buf, &rqstp->rq_res, |
| 1381 | sizeof(req->rq_snd_buf)); |
| 1382 | return bc_send(req); |
| 1383 | } else { |
Trond Myklebust | b3b02ae | 2012-05-31 15:26:38 -0400 | [diff] [blame] | 1384 | /* drop request */ |
| 1385 | xprt_free_bc_request(req); |
Andy Adamson | 4b5b3ba | 2011-01-06 02:04:24 +0000 | [diff] [blame] | 1386 | return 0; |
| 1387 | } |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1388 | } |
Trond Myklebust | 0d961aa | 2011-07-13 19:24:15 -0400 | [diff] [blame] | 1389 | EXPORT_SYMBOL_GPL(bc_svc_process); |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 1390 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1391 | |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1392 | /* |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1393 | * Return (transport-specific) limit on the rpc payload. |
| 1394 | */ |
| 1395 | u32 svc_max_payload(const struct svc_rqst *rqstp) |
| 1396 | { |
Tom Tucker | 4902315 | 2007-12-30 21:07:21 -0600 | [diff] [blame] | 1397 | u32 max = rqstp->rq_xprt->xpt_class->xcl_max_payload; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1398 | |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 1399 | if (rqstp->rq_server->sv_max_payload < max) |
| 1400 | max = rqstp->rq_server->sv_max_payload; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1401 | return max; |
| 1402 | } |
| 1403 | EXPORT_SYMBOL_GPL(svc_max_payload); |