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 | |
| 31 | #define RPCDBG_FACILITY RPCDBG_SVCDSP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 33 | static void svc_unregister(const struct svc_serv *serv, struct net *net); |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 34 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 35 | #define svc_serv_is_pooled(serv) ((serv)->sv_function) |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | /* |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 38 | * Mode for mapping cpus to pools. |
| 39 | */ |
| 40 | enum { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 41 | SVC_POOL_AUTO = -1, /* choose one of the others */ |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 42 | SVC_POOL_GLOBAL, /* no mapping, just a single global pool |
| 43 | * (legacy & UP mode) */ |
| 44 | SVC_POOL_PERCPU, /* one pool per cpu */ |
| 45 | SVC_POOL_PERNODE /* one pool per numa node */ |
| 46 | }; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 47 | #define SVC_POOL_DEFAULT SVC_POOL_GLOBAL |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | * Structure for mapping cpus to pools and vice versa. |
| 51 | * Setup once during sunrpc initialisation. |
| 52 | */ |
| 53 | static struct svc_pool_map { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 54 | int count; /* How many svc_servs use us */ |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 55 | int mode; /* Note: int not enum to avoid |
| 56 | * warnings about "enumeration value |
| 57 | * not handled in switch" */ |
| 58 | unsigned int npools; |
| 59 | unsigned int *pool_to; /* maps pool id to cpu or node */ |
| 60 | unsigned int *to_pool; /* maps cpu or node to pool id */ |
| 61 | } svc_pool_map = { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 62 | .count = 0, |
| 63 | .mode = SVC_POOL_DEFAULT |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 64 | }; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 65 | 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] | 66 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 67 | static int |
| 68 | param_set_pool_mode(const char *val, struct kernel_param *kp) |
| 69 | { |
| 70 | int *ip = (int *)kp->arg; |
| 71 | struct svc_pool_map *m = &svc_pool_map; |
| 72 | int err; |
| 73 | |
| 74 | mutex_lock(&svc_pool_map_mutex); |
| 75 | |
| 76 | err = -EBUSY; |
| 77 | if (m->count) |
| 78 | goto out; |
| 79 | |
| 80 | err = 0; |
| 81 | if (!strncmp(val, "auto", 4)) |
| 82 | *ip = SVC_POOL_AUTO; |
| 83 | else if (!strncmp(val, "global", 6)) |
| 84 | *ip = SVC_POOL_GLOBAL; |
| 85 | else if (!strncmp(val, "percpu", 6)) |
| 86 | *ip = SVC_POOL_PERCPU; |
| 87 | else if (!strncmp(val, "pernode", 7)) |
| 88 | *ip = SVC_POOL_PERNODE; |
| 89 | else |
| 90 | err = -EINVAL; |
| 91 | |
| 92 | out: |
| 93 | mutex_unlock(&svc_pool_map_mutex); |
| 94 | return err; |
| 95 | } |
| 96 | |
| 97 | static int |
| 98 | param_get_pool_mode(char *buf, struct kernel_param *kp) |
| 99 | { |
| 100 | int *ip = (int *)kp->arg; |
| 101 | |
| 102 | switch (*ip) |
| 103 | { |
| 104 | case SVC_POOL_AUTO: |
| 105 | return strlcpy(buf, "auto", 20); |
| 106 | case SVC_POOL_GLOBAL: |
| 107 | return strlcpy(buf, "global", 20); |
| 108 | case SVC_POOL_PERCPU: |
| 109 | return strlcpy(buf, "percpu", 20); |
| 110 | case SVC_POOL_PERNODE: |
| 111 | return strlcpy(buf, "pernode", 20); |
| 112 | default: |
| 113 | return sprintf(buf, "%d", *ip); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | module_param_call(pool_mode, param_set_pool_mode, param_get_pool_mode, |
| 118 | &svc_pool_map.mode, 0644); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 119 | |
| 120 | /* |
| 121 | * Detect best pool mapping mode heuristically, |
| 122 | * according to the machine's topology. |
| 123 | */ |
| 124 | static int |
| 125 | svc_pool_map_choose_mode(void) |
| 126 | { |
| 127 | unsigned int node; |
| 128 | |
Christoph Lameter | 62bc62a | 2009-06-16 15:32:15 -0700 | [diff] [blame] | 129 | if (nr_online_nodes > 1) { |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 130 | /* |
| 131 | * Actually have multiple NUMA nodes, |
| 132 | * so split pools on NUMA node boundaries |
| 133 | */ |
| 134 | return SVC_POOL_PERNODE; |
| 135 | } |
| 136 | |
H Hartley Sweeten | 72c3368 | 2010-03-05 13:42:43 -0800 | [diff] [blame] | 137 | node = first_online_node; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 138 | if (nr_cpus_node(node) > 2) { |
| 139 | /* |
| 140 | * Non-trivial SMP, or CONFIG_NUMA on |
| 141 | * non-NUMA hardware, e.g. with a generic |
| 142 | * x86_64 kernel on Xeons. In this case we |
| 143 | * want to divide the pools on cpu boundaries. |
| 144 | */ |
| 145 | return SVC_POOL_PERCPU; |
| 146 | } |
| 147 | |
| 148 | /* default: one global pool */ |
| 149 | return SVC_POOL_GLOBAL; |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * Allocate the to_pool[] and pool_to[] arrays. |
| 154 | * Returns 0 on success or an errno. |
| 155 | */ |
| 156 | static int |
| 157 | svc_pool_map_alloc_arrays(struct svc_pool_map *m, unsigned int maxpools) |
| 158 | { |
| 159 | m->to_pool = kcalloc(maxpools, sizeof(unsigned int), GFP_KERNEL); |
| 160 | if (!m->to_pool) |
| 161 | goto fail; |
| 162 | m->pool_to = kcalloc(maxpools, sizeof(unsigned int), GFP_KERNEL); |
| 163 | if (!m->pool_to) |
| 164 | goto fail_free; |
| 165 | |
| 166 | return 0; |
| 167 | |
| 168 | fail_free: |
| 169 | kfree(m->to_pool); |
J. Bruce Fields | 61c8504 | 2011-12-22 18:22:49 -0700 | [diff] [blame] | 170 | m->to_pool = NULL; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 171 | fail: |
| 172 | return -ENOMEM; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Initialise the pool map for SVC_POOL_PERCPU mode. |
| 177 | * Returns number of pools or <0 on error. |
| 178 | */ |
| 179 | static int |
| 180 | svc_pool_map_init_percpu(struct svc_pool_map *m) |
| 181 | { |
Christoph Lameter | 53b8a31 | 2007-02-20 13:57:51 -0800 | [diff] [blame] | 182 | unsigned int maxpools = nr_cpu_ids; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 183 | unsigned int pidx = 0; |
| 184 | unsigned int cpu; |
| 185 | int err; |
| 186 | |
| 187 | err = svc_pool_map_alloc_arrays(m, maxpools); |
| 188 | if (err) |
| 189 | return err; |
| 190 | |
| 191 | for_each_online_cpu(cpu) { |
| 192 | BUG_ON(pidx > maxpools); |
| 193 | m->to_pool[cpu] = pidx; |
| 194 | m->pool_to[pidx] = cpu; |
| 195 | pidx++; |
| 196 | } |
| 197 | /* cpus brought online later all get mapped to pool0, sorry */ |
| 198 | |
| 199 | return pidx; |
| 200 | }; |
| 201 | |
| 202 | |
| 203 | /* |
| 204 | * Initialise the pool map for SVC_POOL_PERNODE mode. |
| 205 | * Returns number of pools or <0 on error. |
| 206 | */ |
| 207 | static int |
| 208 | svc_pool_map_init_pernode(struct svc_pool_map *m) |
| 209 | { |
Christoph Lameter | 74c7aa8 | 2007-02-20 13:57:51 -0800 | [diff] [blame] | 210 | unsigned int maxpools = nr_node_ids; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 211 | unsigned int pidx = 0; |
| 212 | unsigned int node; |
| 213 | int err; |
| 214 | |
| 215 | err = svc_pool_map_alloc_arrays(m, maxpools); |
| 216 | if (err) |
| 217 | return err; |
| 218 | |
| 219 | for_each_node_with_cpus(node) { |
| 220 | /* some architectures (e.g. SN2) have cpuless nodes */ |
| 221 | BUG_ON(pidx > maxpools); |
| 222 | m->to_pool[node] = pidx; |
| 223 | m->pool_to[pidx] = node; |
| 224 | pidx++; |
| 225 | } |
| 226 | /* nodes brought online later all get mapped to pool0, sorry */ |
| 227 | |
| 228 | return pidx; |
| 229 | } |
| 230 | |
| 231 | |
| 232 | /* |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 233 | * Add a reference to the global map of cpus to pools (and |
| 234 | * vice versa). Initialise the map if we're the first user. |
| 235 | * Returns the number of pools. |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 236 | */ |
| 237 | static unsigned int |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 238 | svc_pool_map_get(void) |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 239 | { |
| 240 | struct svc_pool_map *m = &svc_pool_map; |
| 241 | int npools = -1; |
| 242 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 243 | mutex_lock(&svc_pool_map_mutex); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 244 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 245 | if (m->count++) { |
| 246 | mutex_unlock(&svc_pool_map_mutex); |
| 247 | return m->npools; |
| 248 | } |
| 249 | |
| 250 | if (m->mode == SVC_POOL_AUTO) |
| 251 | m->mode = svc_pool_map_choose_mode(); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 252 | |
| 253 | switch (m->mode) { |
| 254 | case SVC_POOL_PERCPU: |
| 255 | npools = svc_pool_map_init_percpu(m); |
| 256 | break; |
| 257 | case SVC_POOL_PERNODE: |
| 258 | npools = svc_pool_map_init_pernode(m); |
| 259 | break; |
| 260 | } |
| 261 | |
| 262 | if (npools < 0) { |
| 263 | /* default, or memory allocation failure */ |
| 264 | npools = 1; |
| 265 | m->mode = SVC_POOL_GLOBAL; |
| 266 | } |
| 267 | m->npools = npools; |
| 268 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 269 | mutex_unlock(&svc_pool_map_mutex); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 270 | return m->npools; |
| 271 | } |
| 272 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 273 | |
| 274 | /* |
| 275 | * Drop a reference to the global map of cpus to pools. |
| 276 | * When the last reference is dropped, the map data is |
| 277 | * freed; this allows the sysadmin to change the pool |
| 278 | * mode using the pool_mode module option without |
| 279 | * rebooting or re-loading sunrpc.ko. |
| 280 | */ |
| 281 | static void |
| 282 | svc_pool_map_put(void) |
| 283 | { |
| 284 | struct svc_pool_map *m = &svc_pool_map; |
| 285 | |
| 286 | mutex_lock(&svc_pool_map_mutex); |
| 287 | |
| 288 | if (!--m->count) { |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 289 | kfree(m->to_pool); |
J. Bruce Fields | 61c8504 | 2011-12-22 18:22:49 -0700 | [diff] [blame] | 290 | m->to_pool = NULL; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 291 | kfree(m->pool_to); |
J. Bruce Fields | 61c8504 | 2011-12-22 18:22:49 -0700 | [diff] [blame] | 292 | m->pool_to = NULL; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 293 | m->npools = 0; |
| 294 | } |
| 295 | |
| 296 | mutex_unlock(&svc_pool_map_mutex); |
| 297 | } |
| 298 | |
| 299 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 300 | static int svc_pool_map_get_node(unsigned int pidx) |
| 301 | { |
| 302 | const struct svc_pool_map *m = &svc_pool_map; |
| 303 | |
| 304 | if (m->count) { |
| 305 | if (m->mode == SVC_POOL_PERCPU) |
| 306 | return cpu_to_node(m->pool_to[pidx]); |
| 307 | if (m->mode == SVC_POOL_PERNODE) |
| 308 | return m->pool_to[pidx]; |
| 309 | } |
| 310 | return NUMA_NO_NODE; |
| 311 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 312 | /* |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 313 | * Set the given thread's cpus_allowed mask so that it |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 314 | * will only run on cpus in the given pool. |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 315 | */ |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 316 | static inline void |
| 317 | svc_pool_map_set_cpumask(struct task_struct *task, unsigned int pidx) |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 318 | { |
| 319 | struct svc_pool_map *m = &svc_pool_map; |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 320 | unsigned int node = m->pool_to[pidx]; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 321 | |
| 322 | /* |
| 323 | * The caller checks for sv_nrpools > 1, which |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 324 | * implies that we've been initialized. |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 325 | */ |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 326 | BUG_ON(m->count == 0); |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 327 | |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 328 | switch (m->mode) { |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 329 | case SVC_POOL_PERCPU: |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 330 | { |
Rusty Russell | aa85ea5 | 2009-03-30 22:05:15 -0600 | [diff] [blame] | 331 | set_cpus_allowed_ptr(task, cpumask_of(node)); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 332 | break; |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 333 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 334 | case SVC_POOL_PERNODE: |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 335 | { |
Rusty Russell | a70f730 | 2009-03-13 14:49:46 +1030 | [diff] [blame] | 336 | set_cpus_allowed_ptr(task, cpumask_of_node(node)); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 337 | break; |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 338 | } |
Mike Travis | c5f59f0 | 2008-04-04 18:11:10 -0700 | [diff] [blame] | 339 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | /* |
| 343 | * Use the mapping mode to choose a pool for a given CPU. |
| 344 | * Used when enqueueing an incoming RPC. Always returns |
| 345 | * a non-NULL pool pointer. |
| 346 | */ |
| 347 | struct svc_pool * |
| 348 | svc_pool_for_cpu(struct svc_serv *serv, int cpu) |
| 349 | { |
| 350 | struct svc_pool_map *m = &svc_pool_map; |
| 351 | unsigned int pidx = 0; |
| 352 | |
| 353 | /* |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 354 | * An uninitialised map happens in a pure client when |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 355 | * lockd is brought up, so silently treat it the |
| 356 | * same as SVC_POOL_GLOBAL. |
| 357 | */ |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 358 | if (svc_serv_is_pooled(serv)) { |
| 359 | switch (m->mode) { |
| 360 | case SVC_POOL_PERCPU: |
| 361 | pidx = m->to_pool[cpu]; |
| 362 | break; |
| 363 | case SVC_POOL_PERNODE: |
| 364 | pidx = m->to_pool[cpu_to_node(cpu)]; |
| 365 | break; |
| 366 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 367 | } |
| 368 | return &serv->sv_pools[pidx % serv->sv_nrpools]; |
| 369 | } |
| 370 | |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 371 | static int svc_rpcb_setup(struct svc_serv *serv) |
| 372 | { |
| 373 | int err; |
| 374 | |
Stanislav Kinsbursky | f7a30c1 | 2012-01-13 12:52:51 +0400 | [diff] [blame] | 375 | err = rpcb_create_local(&init_net); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 376 | if (err) |
| 377 | return err; |
| 378 | |
| 379 | /* Remove any stale portmap registrations */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 380 | svc_unregister(serv, &init_net); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 381 | return 0; |
| 382 | } |
| 383 | |
Stanislav Kinsbursky | 16d0587 | 2011-10-25 14:17:28 +0300 | [diff] [blame] | 384 | void svc_rpcb_cleanup(struct svc_serv *serv) |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 385 | { |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 386 | svc_unregister(serv, &init_net); |
Stanislav Kinsbursky | f7a30c1 | 2012-01-13 12:52:51 +0400 | [diff] [blame] | 387 | rpcb_put_local(&init_net); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 388 | } |
Stanislav Kinsbursky | 16d0587 | 2011-10-25 14:17:28 +0300 | [diff] [blame] | 389 | EXPORT_SYMBOL_GPL(svc_rpcb_cleanup); |
Stanislav Kinsbursky | d990856 | 2011-10-25 14:16:58 +0300 | [diff] [blame] | 390 | |
| 391 | static int svc_uses_rpcbind(struct svc_serv *serv) |
| 392 | { |
| 393 | struct svc_program *progp; |
| 394 | unsigned int i; |
| 395 | |
| 396 | for (progp = serv->sv_program; progp; progp = progp->pg_next) { |
| 397 | for (i = 0; i < progp->pg_nvers; i++) { |
| 398 | if (progp->pg_vers[i] == NULL) |
| 399 | continue; |
| 400 | if (progp->pg_vers[i]->vs_hidden == 0) |
| 401 | return 1; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
Greg Banks | bfd2416 | 2006-10-02 02:18:01 -0700 | [diff] [blame] | 407 | |
| 408 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | * Create an RPC service |
| 410 | */ |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 411 | static struct svc_serv * |
| 412 | __svc_create(struct svc_program *prog, unsigned int bufsize, int npools, |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 413 | void (*shutdown)(struct svc_serv *serv)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | { |
| 415 | struct svc_serv *serv; |
Chuck Lever | ea339d4 | 2007-10-26 13:32:56 -0400 | [diff] [blame] | 416 | unsigned int vers; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | unsigned int xdrsize; |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 418 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 420 | if (!(serv = kzalloc(sizeof(*serv), GFP_KERNEL))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | return NULL; |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 422 | serv->sv_name = prog->pg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | serv->sv_program = prog; |
| 424 | serv->sv_nrthreads = 1; |
| 425 | serv->sv_stats = prog->pg_stats; |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 426 | if (bufsize > RPCSVC_MAXPAYLOAD) |
| 427 | bufsize = RPCSVC_MAXPAYLOAD; |
| 428 | serv->sv_max_payload = bufsize? bufsize : 4096; |
| 429 | serv->sv_max_mesg = roundup(serv->sv_max_payload + PAGE_SIZE, PAGE_SIZE); |
NeilBrown | bc591cc | 2006-10-02 02:17:44 -0700 | [diff] [blame] | 430 | serv->sv_shutdown = shutdown; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | xdrsize = 0; |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 432 | while (prog) { |
| 433 | prog->pg_lovers = prog->pg_nvers-1; |
| 434 | for (vers=0; vers<prog->pg_nvers ; vers++) |
| 435 | if (prog->pg_vers[vers]) { |
| 436 | prog->pg_hivers = vers; |
| 437 | if (prog->pg_lovers > vers) |
| 438 | prog->pg_lovers = vers; |
| 439 | if (prog->pg_vers[vers]->vs_xdrsize > xdrsize) |
| 440 | xdrsize = prog->pg_vers[vers]->vs_xdrsize; |
| 441 | } |
| 442 | prog = prog->pg_next; |
| 443 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | serv->sv_xdrsize = xdrsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | INIT_LIST_HEAD(&serv->sv_tempsocks); |
| 446 | INIT_LIST_HEAD(&serv->sv_permsocks); |
Greg Banks | 36bdfc8 | 2006-10-02 02:17:54 -0700 | [diff] [blame] | 447 | init_timer(&serv->sv_temptimer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | spin_lock_init(&serv->sv_lock); |
| 449 | |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 450 | serv->sv_nrpools = npools; |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 451 | serv->sv_pools = |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 452 | kcalloc(serv->sv_nrpools, sizeof(struct svc_pool), |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 453 | GFP_KERNEL); |
| 454 | if (!serv->sv_pools) { |
| 455 | kfree(serv); |
| 456 | return NULL; |
| 457 | } |
| 458 | |
| 459 | for (i = 0; i < serv->sv_nrpools; i++) { |
| 460 | struct svc_pool *pool = &serv->sv_pools[i]; |
| 461 | |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 462 | dprintk("svc: initialising pool %u for %s\n", |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 463 | i, serv->sv_name); |
| 464 | |
| 465 | pool->sp_id = i; |
| 466 | INIT_LIST_HEAD(&pool->sp_threads); |
| 467 | INIT_LIST_HEAD(&pool->sp_sockets); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 468 | INIT_LIST_HEAD(&pool->sp_all_threads); |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 469 | spin_lock_init(&pool->sp_lock); |
| 470 | } |
| 471 | |
Stanislav Kinsbursky | e40f5e2 | 2011-10-25 14:17:08 +0300 | [diff] [blame] | 472 | if (svc_uses_rpcbind(serv)) { |
| 473 | if (svc_rpcb_setup(serv) < 0) { |
| 474 | kfree(serv->sv_pools); |
| 475 | kfree(serv); |
| 476 | return NULL; |
| 477 | } |
| 478 | if (!serv->sv_shutdown) |
| 479 | serv->sv_shutdown = svc_rpcb_cleanup; |
| 480 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
| 482 | return serv; |
| 483 | } |
| 484 | |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 485 | struct svc_serv * |
| 486 | svc_create(struct svc_program *prog, unsigned int bufsize, |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 487 | void (*shutdown)(struct svc_serv *serv)) |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 488 | { |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 489 | return __svc_create(prog, bufsize, /*npools*/1, shutdown); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 490 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 491 | EXPORT_SYMBOL_GPL(svc_create); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 492 | |
| 493 | struct svc_serv * |
| 494 | svc_create_pooled(struct svc_program *prog, unsigned int bufsize, |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 495 | void (*shutdown)(struct svc_serv *serv), |
Jeff Layton | a75c5d0 | 2008-06-10 08:40:39 -0400 | [diff] [blame] | 496 | svc_thread_fn func, struct module *mod) |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 497 | { |
| 498 | struct svc_serv *serv; |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 499 | unsigned int npools = svc_pool_map_get(); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 500 | |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 501 | serv = __svc_create(prog, bufsize, npools, shutdown); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 502 | |
| 503 | if (serv != NULL) { |
| 504 | serv->sv_function = func; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 505 | serv->sv_module = mod; |
| 506 | } |
| 507 | |
| 508 | return serv; |
| 509 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 510 | EXPORT_SYMBOL_GPL(svc_create_pooled); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | /* |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 513 | * Destroy an RPC service. Should be called with appropriate locking to |
| 514 | * protect the sv_nrthreads, sv_permsocks and sv_tempsocks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | */ |
| 516 | void |
| 517 | svc_destroy(struct svc_serv *serv) |
| 518 | { |
Chuck Lever | 46121cf | 2007-01-31 12:14:08 -0500 | [diff] [blame] | 519 | dprintk("svc: svc_destroy(%s, %d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | serv->sv_program->pg_name, |
| 521 | serv->sv_nrthreads); |
| 522 | |
| 523 | if (serv->sv_nrthreads) { |
| 524 | if (--(serv->sv_nrthreads) != 0) { |
| 525 | svc_sock_update_bufs(serv); |
| 526 | return; |
| 527 | } |
| 528 | } else |
| 529 | printk("svc_destroy: no threads for serv=%p!\n", serv); |
| 530 | |
Greg Banks | 36bdfc8 | 2006-10-02 02:17:54 -0700 | [diff] [blame] | 531 | del_timer_sync(&serv->sv_temptimer); |
J. Bruce Fields | b4f36f8 | 2011-11-29 17:00:26 -0500 | [diff] [blame] | 532 | /* |
| 533 | * The set of xprts (contained in the sv_tempsocks and |
| 534 | * sv_permsocks lists) is now constant, since it is modified |
| 535 | * only by accepting new sockets (done by service threads in |
| 536 | * svc_recv) or aging old ones (done by sv_temptimer), or |
| 537 | * configuration changes (excluded by whatever locking the |
| 538 | * caller is using--nfsd_mutex in the case of nfsd). So it's |
| 539 | * safe to traverse those lists and shut everything down: |
| 540 | */ |
J. Bruce Fields | 2fefb8a | 2011-11-29 11:35:35 -0500 | [diff] [blame] | 541 | svc_close_all(serv); |
NeilBrown | cda1fd4 | 2007-03-06 01:42:22 -0800 | [diff] [blame] | 542 | |
NeilBrown | bc591cc | 2006-10-02 02:17:44 -0700 | [diff] [blame] | 543 | if (serv->sv_shutdown) |
| 544 | serv->sv_shutdown(serv); |
| 545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | cache_clean_deferred(serv); |
| 547 | |
Greg Banks | 42a7fc4 | 2007-03-06 01:42:23 -0800 | [diff] [blame] | 548 | if (svc_serv_is_pooled(serv)) |
| 549 | svc_pool_map_put(); |
| 550 | |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 551 | kfree(serv->sv_pools); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | kfree(serv); |
| 553 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 554 | EXPORT_SYMBOL_GPL(svc_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | /* |
| 557 | * Allocate an RPC server's buffer space. |
| 558 | * We allocate pages and place them in rq_argpages. |
| 559 | */ |
| 560 | static int |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 561 | svc_init_buffer(struct svc_rqst *rqstp, unsigned int size, int node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | { |
Chuck Lever | 0dc220f | 2008-04-14 12:27:52 -0400 | [diff] [blame] | 563 | unsigned int pages, arghi; |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 564 | |
Andy Adamson | ba17686 | 2010-01-26 21:24:04 -0500 | [diff] [blame] | 565 | /* bc_xprt uses fore channel allocated buffers */ |
| 566 | if (svc_is_backchannel(rqstp)) |
| 567 | return 1; |
| 568 | |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 569 | pages = size / PAGE_SIZE + 1; /* extra page as we hold both request and reply. |
| 570 | * We assume one is at most one page |
| 571 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | arghi = 0; |
Kris Katterjohn | 09a6266 | 2006-01-08 22:24:28 -0800 | [diff] [blame] | 573 | BUG_ON(pages > RPCSVC_MAXPAGES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | while (pages) { |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 575 | struct page *p = alloc_pages_node(node, GFP_KERNEL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | if (!p) |
| 577 | break; |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 578 | rqstp->rq_pages[arghi++] = p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | pages--; |
| 580 | } |
Chuck Lever | 0dc220f | 2008-04-14 12:27:52 -0400 | [diff] [blame] | 581 | return pages == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /* |
| 585 | * Release an RPC server buffer |
| 586 | */ |
| 587 | static void |
| 588 | svc_release_buffer(struct svc_rqst *rqstp) |
| 589 | { |
Chuck Lever | 50c8bb1 | 2008-04-14 12:27:45 -0400 | [diff] [blame] | 590 | unsigned int i; |
| 591 | |
| 592 | for (i = 0; i < ARRAY_SIZE(rqstp->rq_pages); i++) |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 593 | if (rqstp->rq_pages[i]) |
| 594 | put_page(rqstp->rq_pages[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | } |
| 596 | |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 597 | struct svc_rqst * |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 598 | 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] | 599 | { |
| 600 | struct svc_rqst *rqstp; |
| 601 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 602 | rqstp = kzalloc_node(sizeof(*rqstp), GFP_KERNEL, node); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 603 | if (!rqstp) |
| 604 | goto out_enomem; |
| 605 | |
| 606 | init_waitqueue_head(&rqstp->rq_wait); |
| 607 | |
| 608 | serv->sv_nrthreads++; |
| 609 | spin_lock_bh(&pool->sp_lock); |
| 610 | pool->sp_nrthreads++; |
| 611 | list_add(&rqstp->rq_all, &pool->sp_all_threads); |
| 612 | spin_unlock_bh(&pool->sp_lock); |
| 613 | rqstp->rq_server = serv; |
| 614 | rqstp->rq_pool = pool; |
| 615 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 616 | rqstp->rq_argp = kmalloc_node(serv->sv_xdrsize, GFP_KERNEL, node); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 617 | if (!rqstp->rq_argp) |
| 618 | goto out_thread; |
| 619 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 620 | rqstp->rq_resp = kmalloc_node(serv->sv_xdrsize, GFP_KERNEL, node); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 621 | if (!rqstp->rq_resp) |
| 622 | goto out_thread; |
| 623 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 624 | if (!svc_init_buffer(rqstp, serv->sv_max_mesg, node)) |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 625 | goto out_thread; |
| 626 | |
| 627 | return rqstp; |
| 628 | out_thread: |
| 629 | svc_exit_thread(rqstp); |
| 630 | out_enomem: |
| 631 | return ERR_PTR(-ENOMEM); |
| 632 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 633 | EXPORT_SYMBOL_GPL(svc_prepare_thread); |
Jeff Layton | 0113ab3 | 2008-01-29 10:30:54 -0500 | [diff] [blame] | 634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | /* |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 636 | * Choose a pool in which to create a new thread, for svc_set_num_threads |
| 637 | */ |
| 638 | static inline struct svc_pool * |
| 639 | choose_pool(struct svc_serv *serv, struct svc_pool *pool, unsigned int *state) |
| 640 | { |
| 641 | if (pool != NULL) |
| 642 | return pool; |
| 643 | |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 644 | return &serv->sv_pools[(*state)++ % serv->sv_nrpools]; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | /* |
| 648 | * Choose a thread to kill, for svc_set_num_threads |
| 649 | */ |
| 650 | static inline struct task_struct * |
| 651 | choose_victim(struct svc_serv *serv, struct svc_pool *pool, unsigned int *state) |
| 652 | { |
| 653 | unsigned int i; |
| 654 | struct task_struct *task = NULL; |
| 655 | |
| 656 | if (pool != NULL) { |
| 657 | spin_lock_bh(&pool->sp_lock); |
| 658 | } else { |
| 659 | /* choose a pool in round-robin fashion */ |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 660 | for (i = 0; i < serv->sv_nrpools; i++) { |
| 661 | pool = &serv->sv_pools[--(*state) % serv->sv_nrpools]; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 662 | spin_lock_bh(&pool->sp_lock); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 663 | if (!list_empty(&pool->sp_all_threads)) |
| 664 | goto found_pool; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 665 | spin_unlock_bh(&pool->sp_lock); |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 666 | } |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 667 | return NULL; |
| 668 | } |
| 669 | |
| 670 | found_pool: |
| 671 | if (!list_empty(&pool->sp_all_threads)) { |
| 672 | struct svc_rqst *rqstp; |
| 673 | |
| 674 | /* |
| 675 | * Remove from the pool->sp_all_threads list |
| 676 | * so we don't try to kill it again. |
| 677 | */ |
| 678 | rqstp = list_entry(pool->sp_all_threads.next, struct svc_rqst, rq_all); |
| 679 | list_del_init(&rqstp->rq_all); |
| 680 | task = rqstp->rq_task; |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 681 | } |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 682 | spin_unlock_bh(&pool->sp_lock); |
| 683 | |
| 684 | return task; |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * Create or destroy enough new threads to make the number |
| 689 | * of threads the given number. If `pool' is non-NULL, applies |
| 690 | * only to threads in that pool, otherwise round-robins between |
J. Bruce Fields | 94cf317 | 2011-12-01 17:51:21 -0500 | [diff] [blame] | 691 | * all pools. Caller must ensure that mutual exclusion between this and |
| 692 | * server startup or shutdown. |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 693 | * |
| 694 | * Destroying threads relies on the service threads filling in |
| 695 | * rqstp->rq_task, which only the nfs ones do. Assumes the serv |
| 696 | * has been created using svc_create_pooled(). |
| 697 | * |
| 698 | * Based on code that used to be in nfsd_svc() but tweaked |
| 699 | * to be pool-aware. |
| 700 | */ |
| 701 | int |
| 702 | svc_set_num_threads(struct svc_serv *serv, struct svc_pool *pool, int nrservs) |
| 703 | { |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 704 | struct svc_rqst *rqstp; |
| 705 | struct task_struct *task; |
| 706 | struct svc_pool *chosen_pool; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 707 | int error = 0; |
| 708 | unsigned int state = serv->sv_nrthreads-1; |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 709 | int node; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 710 | |
| 711 | if (pool == NULL) { |
| 712 | /* The -1 assumes caller has done a svc_get() */ |
| 713 | nrservs -= (serv->sv_nrthreads-1); |
| 714 | } else { |
| 715 | spin_lock_bh(&pool->sp_lock); |
| 716 | nrservs -= pool->sp_nrthreads; |
| 717 | spin_unlock_bh(&pool->sp_lock); |
| 718 | } |
| 719 | |
| 720 | /* create new threads */ |
| 721 | while (nrservs > 0) { |
| 722 | nrservs--; |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 723 | chosen_pool = choose_pool(serv, pool, &state); |
| 724 | |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 725 | node = svc_pool_map_get_node(chosen_pool->sp_id); |
| 726 | rqstp = svc_prepare_thread(serv, chosen_pool, node); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 727 | if (IS_ERR(rqstp)) { |
| 728 | error = PTR_ERR(rqstp); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 729 | break; |
| 730 | } |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 731 | |
| 732 | __module_get(serv->sv_module); |
Eric Dumazet | 11fd165 | 2011-07-28 20:04:09 +0200 | [diff] [blame] | 733 | task = kthread_create_on_node(serv->sv_function, rqstp, |
| 734 | node, serv->sv_name); |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 735 | if (IS_ERR(task)) { |
| 736 | error = PTR_ERR(task); |
| 737 | module_put(serv->sv_module); |
| 738 | svc_exit_thread(rqstp); |
| 739 | break; |
| 740 | } |
| 741 | |
| 742 | rqstp->rq_task = task; |
| 743 | if (serv->sv_nrpools > 1) |
| 744 | svc_pool_map_set_cpumask(task, chosen_pool->sp_id); |
| 745 | |
| 746 | svc_sock_update_bufs(serv); |
| 747 | wake_up_process(task); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 748 | } |
| 749 | /* destroy old threads */ |
| 750 | while (nrservs < 0 && |
Jeff Layton | 9867d76 | 2008-06-10 08:40:38 -0400 | [diff] [blame] | 751 | (task = choose_victim(serv, pool, &state)) != NULL) { |
Jeff Layton | a75c5d0 | 2008-06-10 08:40:39 -0400 | [diff] [blame] | 752 | send_sig(SIGINT, task, 1); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 753 | nrservs++; |
| 754 | } |
| 755 | |
| 756 | return error; |
| 757 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 758 | EXPORT_SYMBOL_GPL(svc_set_num_threads); |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 759 | |
| 760 | /* |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 761 | * Called from a server thread as it's exiting. Caller must hold the BKL or |
| 762 | * the "service mutex", whichever is appropriate for the service. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | */ |
| 764 | void |
| 765 | svc_exit_thread(struct svc_rqst *rqstp) |
| 766 | { |
| 767 | struct svc_serv *serv = rqstp->rq_server; |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 768 | struct svc_pool *pool = rqstp->rq_pool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
| 770 | svc_release_buffer(rqstp); |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 771 | kfree(rqstp->rq_resp); |
| 772 | kfree(rqstp->rq_argp); |
| 773 | kfree(rqstp->rq_auth_data); |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 774 | |
| 775 | spin_lock_bh(&pool->sp_lock); |
| 776 | pool->sp_nrthreads--; |
Greg Banks | a745544 | 2006-10-02 02:17:59 -0700 | [diff] [blame] | 777 | list_del(&rqstp->rq_all); |
Greg Banks | 3262c81 | 2006-10-02 02:17:58 -0700 | [diff] [blame] | 778 | spin_unlock_bh(&pool->sp_lock); |
| 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | kfree(rqstp); |
| 781 | |
| 782 | /* Release the server */ |
| 783 | if (serv) |
| 784 | svc_destroy(serv); |
| 785 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 786 | EXPORT_SYMBOL_GPL(svc_exit_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
| 788 | /* |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 789 | * Register an "inet" protocol family netid with the local |
| 790 | * rpcbind daemon via an rpcbind v4 SET request. |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 791 | * |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 792 | * No netconfig infrastructure is available in the kernel, so |
| 793 | * we map IP_ protocol numbers to netids by hand. |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 794 | * |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 795 | * Returns zero on success; a negative errno value is returned |
| 796 | * if any error occurs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 798 | static int __svc_rpcb_register4(struct net *net, const u32 program, |
| 799 | const u32 version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 800 | const unsigned short protocol, |
| 801 | const unsigned short port) |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 802 | { |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 803 | const struct sockaddr_in sin = { |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 804 | .sin_family = AF_INET, |
| 805 | .sin_addr.s_addr = htonl(INADDR_ANY), |
| 806 | .sin_port = htons(port), |
| 807 | }; |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 808 | const char *netid; |
| 809 | int error; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 810 | |
| 811 | switch (protocol) { |
| 812 | case IPPROTO_UDP: |
| 813 | netid = RPCBIND_NETID_UDP; |
| 814 | break; |
| 815 | case IPPROTO_TCP: |
| 816 | netid = RPCBIND_NETID_TCP; |
| 817 | break; |
| 818 | default: |
Chuck Lever | ba5c35e | 2009-03-18 20:46:59 -0400 | [diff] [blame] | 819 | return -ENOPROTOOPT; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 820 | } |
| 821 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 822 | error = rpcb_v4_register(net, program, version, |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 823 | (const struct sockaddr *)&sin, netid); |
| 824 | |
| 825 | /* |
| 826 | * User space didn't support rpcbind v4, so retry this |
| 827 | * registration request with the legacy rpcbind v2 protocol. |
| 828 | */ |
| 829 | if (error == -EPROTONOSUPPORT) |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 830 | error = rpcb_register(net, program, version, protocol, port); |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 831 | |
| 832 | return error; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 833 | } |
| 834 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 835 | #if IS_ENABLED(CONFIG_IPV6) |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 836 | /* |
| 837 | * Register an "inet6" protocol family netid with the local |
| 838 | * rpcbind daemon via an rpcbind v4 SET request. |
| 839 | * |
| 840 | * No netconfig infrastructure is available in the kernel, so |
| 841 | * we map IP_ protocol numbers to netids by hand. |
| 842 | * |
| 843 | * Returns zero on success; a negative errno value is returned |
| 844 | * if any error occurs. |
| 845 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 846 | static int __svc_rpcb_register6(struct net *net, const u32 program, |
| 847 | const u32 version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 848 | const unsigned short protocol, |
| 849 | const unsigned short port) |
| 850 | { |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 851 | const struct sockaddr_in6 sin6 = { |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 852 | .sin6_family = AF_INET6, |
| 853 | .sin6_addr = IN6ADDR_ANY_INIT, |
| 854 | .sin6_port = htons(port), |
| 855 | }; |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 856 | const char *netid; |
| 857 | int error; |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 858 | |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 859 | switch (protocol) { |
| 860 | case IPPROTO_UDP: |
| 861 | netid = RPCBIND_NETID_UDP6; |
| 862 | break; |
| 863 | case IPPROTO_TCP: |
| 864 | netid = RPCBIND_NETID_TCP6; |
| 865 | break; |
| 866 | default: |
Chuck Lever | ba5c35e | 2009-03-18 20:46:59 -0400 | [diff] [blame] | 867 | return -ENOPROTOOPT; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 868 | } |
| 869 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 870 | error = rpcb_v4_register(net, program, version, |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 871 | (const struct sockaddr *)&sin6, netid); |
| 872 | |
| 873 | /* |
| 874 | * User space didn't support rpcbind version 4, so we won't |
| 875 | * use a PF_INET6 listener. |
| 876 | */ |
| 877 | if (error == -EPROTONOSUPPORT) |
| 878 | error = -EAFNOSUPPORT; |
| 879 | |
| 880 | return error; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 881 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 882 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 883 | |
| 884 | /* |
| 885 | * Register a kernel RPC service via rpcbind version 4. |
| 886 | * |
| 887 | * Returns zero on success; a negative errno value is returned |
| 888 | * if any error occurs. |
| 889 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 890 | static int __svc_register(struct net *net, const char *progname, |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 891 | const u32 program, const u32 version, |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 892 | const int family, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 893 | const unsigned short protocol, |
| 894 | const unsigned short port) |
| 895 | { |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 896 | int error = -EAFNOSUPPORT; |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 897 | |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 898 | switch (family) { |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 899 | case PF_INET: |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 900 | error = __svc_rpcb_register4(net, program, version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 901 | protocol, port); |
Chuck Lever | cadc0fa | 2009-03-18 20:47:36 -0400 | [diff] [blame] | 902 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 903 | #if IS_ENABLED(CONFIG_IPV6) |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 904 | case PF_INET6: |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 905 | error = __svc_rpcb_register6(net, program, version, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 906 | protocol, port); |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 907 | #endif |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 908 | } |
| 909 | |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 910 | if (error < 0) |
| 911 | printk(KERN_WARNING "svc: failed to register %sv%u RPC " |
| 912 | "service (errno %d).\n", progname, version, -error); |
| 913 | return error; |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 914 | } |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 915 | |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 916 | /** |
| 917 | * svc_register - register an RPC service with the local portmapper |
| 918 | * @serv: svc_serv struct for the service to register |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 919 | * @net: net namespace for the service to register |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 920 | * @family: protocol family of service's listener socket |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 921 | * @proto: transport protocol number to advertise |
| 922 | * @port: port to advertise |
| 923 | * |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 924 | * Service is registered for any address in the passed-in protocol family |
Chuck Lever | a26cfad | 2008-08-18 19:34:16 -0400 | [diff] [blame] | 925 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 926 | int svc_register(const struct svc_serv *serv, struct net *net, |
| 927 | const int family, const unsigned short proto, |
| 928 | const unsigned short port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | { |
| 930 | struct svc_program *progp; |
Chuck Lever | ea339d4 | 2007-10-26 13:32:56 -0400 | [diff] [blame] | 931 | unsigned int i; |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 932 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 934 | BUG_ON(proto == 0 && port == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 936 | for (progp = serv->sv_program; progp; progp = progp->pg_next) { |
| 937 | for (i = 0; i < progp->pg_nvers; i++) { |
| 938 | if (progp->pg_vers[i] == NULL) |
| 939 | continue; |
| 940 | |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 941 | dprintk("svc: svc_register(%sv%d, %s, %u, %u)%s\n", |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 942 | progp->pg_name, |
Chuck Lever | 2c7eb0b | 2008-09-15 16:27:23 -0500 | [diff] [blame] | 943 | i, |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 944 | proto == IPPROTO_UDP? "udp" : "tcp", |
| 945 | port, |
Chuck Lever | 4b62e58 | 2009-03-18 20:46:06 -0400 | [diff] [blame] | 946 | family, |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 947 | progp->pg_vers[i]->vs_hidden? |
| 948 | " (but not telling portmap)" : ""); |
| 949 | |
| 950 | if (progp->pg_vers[i]->vs_hidden) |
| 951 | continue; |
| 952 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 953 | error = __svc_register(net, progp->pg_name, progp->pg_prog, |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 954 | i, family, proto, port); |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 955 | if (error < 0) |
| 956 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | } |
| 958 | } |
| 959 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 960 | return error; |
| 961 | } |
| 962 | |
Chuck Lever | d5a8620 | 2009-03-18 20:47:29 -0400 | [diff] [blame] | 963 | /* |
| 964 | * If user space is running rpcbind, it should take the v4 UNSET |
| 965 | * and clear everything for this [program, version]. If user space |
| 966 | * is running portmap, it will reject the v4 UNSET, but won't have |
| 967 | * any "inet6" entries anyway. So a PMAP_UNSET should be sufficient |
| 968 | * in this case to clear all existing entries for [program, version]. |
| 969 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 970 | 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] | 971 | const char *progname) |
| 972 | { |
| 973 | int error; |
| 974 | |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 975 | error = rpcb_v4_register(net, program, version, NULL, ""); |
Chuck Lever | d5a8620 | 2009-03-18 20:47:29 -0400 | [diff] [blame] | 976 | |
| 977 | /* |
| 978 | * User space didn't support rpcbind v4, so retry this |
| 979 | * request with the legacy rpcbind v2 protocol. |
| 980 | */ |
| 981 | if (error == -EPROTONOSUPPORT) |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 982 | error = rpcb_register(net, program, version, 0, 0); |
Chuck Lever | d5a8620 | 2009-03-18 20:47:29 -0400 | [diff] [blame] | 983 | |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 984 | dprintk("svc: %s(%sv%u), error %d\n", |
| 985 | __func__, progname, version, error); |
| 986 | } |
| 987 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 988 | /* |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 989 | * All netids, bind addresses and ports registered for [program, version] |
| 990 | * are removed from the local rpcbind database (if the service is not |
| 991 | * hidden) to make way for a new instance of the service. |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 992 | * |
Chuck Lever | f6fb3f6 | 2008-09-25 11:56:57 -0400 | [diff] [blame] | 993 | * The result of unregistration is reported via dprintk for those who want |
| 994 | * verification of the result, but is otherwise not important. |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 995 | */ |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 996 | static void svc_unregister(const struct svc_serv *serv, struct net *net) |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 997 | { |
| 998 | struct svc_program *progp; |
| 999 | unsigned long flags; |
| 1000 | unsigned int i; |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1001 | |
| 1002 | clear_thread_flag(TIF_SIGPENDING); |
| 1003 | |
| 1004 | for (progp = serv->sv_program; progp; progp = progp->pg_next) { |
| 1005 | for (i = 0; i < progp->pg_nvers; i++) { |
| 1006 | if (progp->pg_vers[i] == NULL) |
| 1007 | continue; |
| 1008 | if (progp->pg_vers[i]->vs_hidden) |
| 1009 | continue; |
| 1010 | |
Chuck Lever | 7402ab1 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 1011 | dprintk("svc: attempting to unregister %sv%u\n", |
| 1012 | progp->pg_name, i); |
Stanislav Kinsbursky | 5247fab | 2012-01-13 14:02:48 +0400 | [diff] [blame^] | 1013 | __svc_unregister(net, progp->pg_prog, i, progp->pg_name); |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1014 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | } |
| 1016 | |
Chuck Lever | 7252d57 | 2008-08-18 19:34:08 -0400 | [diff] [blame] | 1017 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 1018 | recalc_sigpending(); |
| 1019 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | /* |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1023 | * Printk the given error with the address of the client that caused it. |
| 1024 | */ |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 1025 | static __printf(2, 3) |
| 1026 | int svc_printk(struct svc_rqst *rqstp, const char *fmt, ...) |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1027 | { |
| 1028 | va_list args; |
| 1029 | int r; |
| 1030 | char buf[RPC_MAX_ADDRBUFLEN]; |
| 1031 | |
| 1032 | if (!net_ratelimit()) |
| 1033 | return 0; |
| 1034 | |
| 1035 | printk(KERN_WARNING "svc: %s: ", |
| 1036 | svc_print_addr(rqstp, buf, sizeof(buf))); |
| 1037 | |
| 1038 | va_start(args, fmt); |
| 1039 | r = vprintk(fmt, args); |
| 1040 | va_end(args); |
| 1041 | |
| 1042 | return r; |
| 1043 | } |
| 1044 | |
| 1045 | /* |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1046 | * Common routine for processing the RPC request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | */ |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1048 | static int |
| 1049 | 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] | 1050 | { |
| 1051 | struct svc_program *progp; |
| 1052 | struct svc_version *versp = NULL; /* compiler food */ |
| 1053 | struct svc_procedure *procp = NULL; |
NeilBrown | 6fb2b47 | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1054 | struct svc_serv *serv = rqstp->rq_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | kxdrproc_t xdr; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1056 | __be32 *statp; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1057 | u32 prog, vers, proc; |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 1058 | __be32 auth_stat, rpc_stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | int auth_res; |
J.Bruce Fields | 8f8e05c | 2006-10-04 02:16:08 -0700 | [diff] [blame] | 1060 | __be32 *reply_statp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
| 1062 | rpc_stat = rpc_success; |
| 1063 | |
| 1064 | if (argv->iov_len < 6*4) |
| 1065 | goto err_short_len; |
| 1066 | |
J. Bruce Fields | 5c04c46 | 2006-06-30 01:56:19 -0700 | [diff] [blame] | 1067 | /* Will be turned off only in gss privacy case: */ |
Jens Axboe | cf8208d | 2007-06-12 21:22:14 +0200 | [diff] [blame] | 1068 | rqstp->rq_splice_ok = 1; |
Andy Adamson | 2f42587 | 2009-04-03 08:27:32 +0300 | [diff] [blame] | 1069 | /* Will be turned off only when NFSv4 Sessions are used */ |
| 1070 | rqstp->rq_usedeferral = 1; |
J. Bruce Fields | 9e701c6 | 2011-01-02 21:56:36 -0500 | [diff] [blame] | 1071 | rqstp->rq_dropme = false; |
Tom Tucker | e831fe6 | 2007-12-30 21:07:29 -0600 | [diff] [blame] | 1072 | |
| 1073 | /* Setup reply header */ |
| 1074 | rqstp->rq_xprt->xpt_ops->xpo_prep_reply_hdr(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | svc_putu32(resv, rqstp->rq_xid); |
| 1077 | |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1078 | vers = svc_getnl(argv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | |
| 1080 | /* First words of reply: */ |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1081 | svc_putnl(resv, 1); /* REPLY */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | if (vers != 2) /* RPC version number */ |
| 1084 | goto err_bad_rpc; |
| 1085 | |
| 1086 | /* Save position in case we later decide to reject: */ |
J.Bruce Fields | 8f8e05c | 2006-10-04 02:16:08 -0700 | [diff] [blame] | 1087 | reply_statp = resv->iov_base + resv->iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1089 | svc_putnl(resv, 0); /* ACCEPT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1091 | rqstp->rq_prog = prog = svc_getnl(argv); /* program number */ |
| 1092 | rqstp->rq_vers = vers = svc_getnl(argv); /* version number */ |
| 1093 | rqstp->rq_proc = proc = svc_getnl(argv); /* procedure number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | progp = serv->sv_program; |
NeilBrown | 80d188a | 2005-11-07 01:00:27 -0800 | [diff] [blame] | 1096 | |
| 1097 | for (progp = serv->sv_program; progp; progp = progp->pg_next) |
| 1098 | if (prog == progp->pg_prog) |
| 1099 | break; |
| 1100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | /* |
| 1102 | * Decode auth data, and add verifier to reply buffer. |
| 1103 | * We do this before anything else in order to get a decent |
| 1104 | * auth verifier. |
| 1105 | */ |
| 1106 | auth_res = svc_authenticate(rqstp, &auth_stat); |
| 1107 | /* Also give the program a chance to reject this call: */ |
NeilBrown | 80d188a | 2005-11-07 01:00:27 -0800 | [diff] [blame] | 1108 | if (auth_res == SVC_OK && progp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | auth_stat = rpc_autherr_badcred; |
| 1110 | auth_res = progp->pg_authenticate(rqstp); |
| 1111 | } |
| 1112 | switch (auth_res) { |
| 1113 | case SVC_OK: |
| 1114 | break; |
| 1115 | case SVC_GARBAGE: |
Harshula Jayasuriya | dd35210 | 2008-02-20 10:56:56 +1100 | [diff] [blame] | 1116 | goto err_garbage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | case SVC_SYSERR: |
| 1118 | rpc_stat = rpc_system_err; |
| 1119 | goto err_bad; |
| 1120 | case SVC_DENIED: |
| 1121 | goto err_bad_auth; |
NeilBrown | 1ebede8 | 2010-08-12 17:04:07 +1000 | [diff] [blame] | 1122 | case SVC_CLOSE: |
| 1123 | if (test_bit(XPT_TEMP, &rqstp->rq_xprt->xpt_flags)) |
| 1124 | svc_close_xprt(rqstp->rq_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | case SVC_DROP: |
| 1126 | goto dropit; |
| 1127 | case SVC_COMPLETE: |
| 1128 | goto sendit; |
| 1129 | } |
NeilBrown | 80d188a | 2005-11-07 01:00:27 -0800 | [diff] [blame] | 1130 | |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 1131 | if (progp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | goto err_bad_prog; |
| 1133 | |
| 1134 | if (vers >= progp->pg_nvers || |
| 1135 | !(versp = progp->pg_vers[vers])) |
| 1136 | goto err_bad_vers; |
| 1137 | |
| 1138 | procp = versp->vs_proc + proc; |
| 1139 | if (proc >= versp->vs_nproc || !procp->pc_func) |
| 1140 | goto err_bad_proc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | rqstp->rq_procinfo = procp; |
| 1142 | |
| 1143 | /* Syntactic check complete */ |
| 1144 | serv->sv_stats->rpccnt++; |
| 1145 | |
| 1146 | /* Build the reply header. */ |
| 1147 | statp = resv->iov_base +resv->iov_len; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1148 | svc_putnl(resv, RPC_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
| 1150 | /* Bump per-procedure stats counter */ |
| 1151 | procp->pc_count++; |
| 1152 | |
| 1153 | /* Initialize storage for argp and resp */ |
| 1154 | memset(rqstp->rq_argp, 0, procp->pc_argsize); |
| 1155 | memset(rqstp->rq_resp, 0, procp->pc_ressize); |
| 1156 | |
YOSHIFUJI Hideaki | cca5172 | 2007-02-09 15:38:13 -0800 | [diff] [blame] | 1157 | /* un-reserve some of the out-queue now that we have a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | * better idea of reply size |
| 1159 | */ |
| 1160 | if (procp->pc_xdrressize) |
Jeff Layton | cd12301 | 2007-05-09 02:34:50 -0700 | [diff] [blame] | 1161 | svc_reserve_auth(rqstp, procp->pc_xdrressize<<2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
| 1163 | /* Call the function that processes the request. */ |
| 1164 | if (!versp->vs_dispatch) { |
| 1165 | /* Decode arguments */ |
| 1166 | xdr = procp->pc_decode; |
| 1167 | if (xdr && !xdr(rqstp, argv->iov_base, rqstp->rq_argp)) |
| 1168 | goto err_garbage; |
| 1169 | |
| 1170 | *statp = procp->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp); |
| 1171 | |
| 1172 | /* Encode reply */ |
J. Bruce Fields | 9e701c6 | 2011-01-02 21:56:36 -0500 | [diff] [blame] | 1173 | if (rqstp->rq_dropme) { |
NeilBrown | d343fce | 2006-10-17 00:10:18 -0700 | [diff] [blame] | 1174 | if (procp->pc_release) |
| 1175 | procp->pc_release(rqstp, NULL, rqstp->rq_resp); |
| 1176 | goto dropit; |
| 1177 | } |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1178 | if (*statp == rpc_success && |
| 1179 | (xdr = procp->pc_encode) && |
| 1180 | !xdr(rqstp, resv->iov_base+resv->iov_len, rqstp->rq_resp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | dprintk("svc: failed to encode reply\n"); |
| 1182 | /* serv->sv_stats->rpcsystemerr++; */ |
| 1183 | *statp = rpc_system_err; |
| 1184 | } |
| 1185 | } else { |
| 1186 | dprintk("svc: calling dispatcher\n"); |
| 1187 | if (!versp->vs_dispatch(rqstp, statp)) { |
| 1188 | /* Release reply info */ |
| 1189 | if (procp->pc_release) |
| 1190 | procp->pc_release(rqstp, NULL, rqstp->rq_resp); |
| 1191 | goto dropit; |
| 1192 | } |
| 1193 | } |
| 1194 | |
| 1195 | /* Check RPC status result */ |
| 1196 | if (*statp != rpc_success) |
| 1197 | resv->iov_len = ((void*)statp) - resv->iov_base + 4; |
| 1198 | |
| 1199 | /* Release reply info */ |
| 1200 | if (procp->pc_release) |
| 1201 | procp->pc_release(rqstp, NULL, rqstp->rq_resp); |
| 1202 | |
| 1203 | if (procp->pc_encode == NULL) |
| 1204 | goto dropit; |
| 1205 | |
| 1206 | sendit: |
| 1207 | if (svc_authorise(rqstp)) |
| 1208 | goto dropit; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1209 | return 1; /* Caller can now send it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | |
| 1211 | dropit: |
| 1212 | svc_authorise(rqstp); /* doesn't hurt to call this twice */ |
| 1213 | dprintk("svc: svc_process dropit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | return 0; |
| 1215 | |
| 1216 | err_short_len: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1217 | svc_printk(rqstp, "short len %Zd, dropping request\n", |
| 1218 | argv->iov_len); |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | goto dropit; /* drop request */ |
| 1221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | err_bad_rpc: |
| 1223 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1224 | svc_putnl(resv, 1); /* REJECT */ |
| 1225 | svc_putnl(resv, 0); /* RPC_MISMATCH */ |
| 1226 | svc_putnl(resv, 2); /* Only RPCv2 supported */ |
| 1227 | svc_putnl(resv, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | goto sendit; |
| 1229 | |
| 1230 | err_bad_auth: |
| 1231 | dprintk("svc: authentication failed (%d)\n", ntohl(auth_stat)); |
| 1232 | serv->sv_stats->rpcbadauth++; |
| 1233 | /* Restore write pointer to location of accept status: */ |
J.Bruce Fields | 8f8e05c | 2006-10-04 02:16:08 -0700 | [diff] [blame] | 1234 | xdr_ressize_check(rqstp, reply_statp); |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1235 | svc_putnl(resv, 1); /* REJECT */ |
| 1236 | svc_putnl(resv, 1); /* AUTH_ERROR */ |
| 1237 | svc_putnl(resv, ntohl(auth_stat)); /* status */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | goto sendit; |
| 1239 | |
| 1240 | err_bad_prog: |
Andreas Gruenbacher | 9ba0263 | 2005-06-22 17:16:24 +0000 | [diff] [blame] | 1241 | dprintk("svc: unknown program %d\n", prog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1243 | svc_putnl(resv, RPC_PROG_UNAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | goto sendit; |
| 1245 | |
| 1246 | err_bad_vers: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1247 | svc_printk(rqstp, "unknown version (%d for prog %d, %s)\n", |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1248 | vers, prog, progp->pg_name); |
| 1249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1251 | svc_putnl(resv, RPC_PROG_MISMATCH); |
| 1252 | svc_putnl(resv, progp->pg_lovers); |
| 1253 | svc_putnl(resv, progp->pg_hivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | goto sendit; |
| 1255 | |
| 1256 | err_bad_proc: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1257 | svc_printk(rqstp, "unknown procedure (%d)\n", proc); |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1260 | svc_putnl(resv, RPC_PROC_UNAVAIL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | goto sendit; |
| 1262 | |
| 1263 | err_garbage: |
Dr. David Alan Gilbert | 354ecbb | 2007-08-25 16:09:27 +0100 | [diff] [blame] | 1264 | svc_printk(rqstp, "failed to decode args\n"); |
NeilBrown | 34e9a63 | 2007-01-29 13:19:52 -0800 | [diff] [blame] | 1265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | rpc_stat = rpc_garbage_args; |
| 1267 | err_bad: |
| 1268 | serv->sv_stats->rpcbadfmt++; |
Alexey Dobriyan | 7699431 | 2006-09-26 22:28:46 -0700 | [diff] [blame] | 1269 | svc_putnl(resv, ntohl(rpc_stat)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | goto sendit; |
| 1271 | } |
Trond Myklebust | 24c3767 | 2008-12-23 16:30:12 -0500 | [diff] [blame] | 1272 | EXPORT_SYMBOL_GPL(svc_process); |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1273 | |
| 1274 | /* |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1275 | * Process the RPC request. |
| 1276 | */ |
| 1277 | int |
| 1278 | svc_process(struct svc_rqst *rqstp) |
| 1279 | { |
| 1280 | struct kvec *argv = &rqstp->rq_arg.head[0]; |
| 1281 | struct kvec *resv = &rqstp->rq_res.head[0]; |
| 1282 | struct svc_serv *serv = rqstp->rq_server; |
| 1283 | u32 dir; |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1284 | |
| 1285 | /* |
| 1286 | * Setup response xdr_buf. |
| 1287 | * Initially it has just one page |
| 1288 | */ |
| 1289 | rqstp->rq_resused = 1; |
| 1290 | resv->iov_base = page_address(rqstp->rq_respages[0]); |
| 1291 | resv->iov_len = 0; |
| 1292 | rqstp->rq_res.pages = rqstp->rq_respages + 1; |
| 1293 | rqstp->rq_res.len = 0; |
| 1294 | rqstp->rq_res.page_base = 0; |
| 1295 | rqstp->rq_res.page_len = 0; |
| 1296 | rqstp->rq_res.buflen = PAGE_SIZE; |
| 1297 | rqstp->rq_res.tail[0].iov_base = NULL; |
| 1298 | rqstp->rq_res.tail[0].iov_len = 0; |
| 1299 | |
| 1300 | rqstp->rq_xid = svc_getu32(argv); |
| 1301 | |
| 1302 | dir = svc_getnl(argv); |
| 1303 | if (dir != 0) { |
| 1304 | /* direction != CALL */ |
| 1305 | svc_printk(rqstp, "bad direction %d, dropping request\n", dir); |
| 1306 | serv->sv_stats->rpcbadfmt++; |
| 1307 | svc_drop(rqstp); |
| 1308 | return 0; |
| 1309 | } |
| 1310 | |
Andy Adamson | 4b5b3ba | 2011-01-06 02:04:24 +0000 | [diff] [blame] | 1311 | /* Returns 1 for send, 0 for drop */ |
| 1312 | if (svc_process_common(rqstp, argv, resv)) |
| 1313 | return svc_send(rqstp); |
| 1314 | else { |
| 1315 | svc_drop(rqstp); |
| 1316 | return 0; |
| 1317 | } |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1318 | } |
| 1319 | |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 1320 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1321 | /* |
| 1322 | * Process a backchannel RPC request that arrived over an existing |
| 1323 | * outbound connection |
| 1324 | */ |
| 1325 | int |
| 1326 | bc_svc_process(struct svc_serv *serv, struct rpc_rqst *req, |
| 1327 | struct svc_rqst *rqstp) |
| 1328 | { |
| 1329 | struct kvec *argv = &rqstp->rq_arg.head[0]; |
| 1330 | struct kvec *resv = &rqstp->rq_res.head[0]; |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1331 | |
| 1332 | /* Build the svc_rqst used by the common processing routine */ |
Andy Adamson | 4a19de0 | 2011-01-06 02:04:35 +0000 | [diff] [blame] | 1333 | rqstp->rq_xprt = serv->sv_bc_xprt; |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1334 | rqstp->rq_xid = req->rq_xid; |
| 1335 | rqstp->rq_prot = req->rq_xprt->prot; |
| 1336 | rqstp->rq_server = serv; |
| 1337 | |
| 1338 | rqstp->rq_addrlen = sizeof(req->rq_xprt->addr); |
| 1339 | memcpy(&rqstp->rq_addr, &req->rq_xprt->addr, rqstp->rq_addrlen); |
| 1340 | memcpy(&rqstp->rq_arg, &req->rq_rcv_buf, sizeof(rqstp->rq_arg)); |
| 1341 | memcpy(&rqstp->rq_res, &req->rq_snd_buf, sizeof(rqstp->rq_res)); |
| 1342 | |
| 1343 | /* reset result send buffer "put" position */ |
| 1344 | resv->iov_len = 0; |
| 1345 | |
| 1346 | if (rqstp->rq_prot != IPPROTO_TCP) { |
| 1347 | printk(KERN_ERR "No support for Non-TCP transports!\n"); |
| 1348 | BUG(); |
| 1349 | } |
| 1350 | |
| 1351 | /* |
| 1352 | * Skip the next two words because they've already been |
| 1353 | * processed in the trasport |
| 1354 | */ |
| 1355 | svc_getu32(argv); /* XID */ |
| 1356 | svc_getnl(argv); /* CALLDIR */ |
| 1357 | |
Andy Adamson | 4b5b3ba | 2011-01-06 02:04:24 +0000 | [diff] [blame] | 1358 | /* Returns 1 for send, 0 for drop */ |
| 1359 | if (svc_process_common(rqstp, argv, resv)) { |
| 1360 | memcpy(&req->rq_snd_buf, &rqstp->rq_res, |
| 1361 | sizeof(req->rq_snd_buf)); |
| 1362 | return bc_send(req); |
| 1363 | } else { |
| 1364 | /* Nothing to do to drop request */ |
| 1365 | return 0; |
| 1366 | } |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1367 | } |
Trond Myklebust | 0d961aa | 2011-07-13 19:24:15 -0400 | [diff] [blame] | 1368 | EXPORT_SYMBOL_GPL(bc_svc_process); |
Trond Myklebust | 9e00abc | 2011-07-13 19:20:49 -0400 | [diff] [blame] | 1369 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
Ricardo Labiaga | 4d6bbb6 | 2009-04-01 09:23:07 -0400 | [diff] [blame] | 1370 | |
Ricardo Labiaga | 1cad7ea | 2009-04-01 09:23:06 -0400 | [diff] [blame] | 1371 | /* |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1372 | * Return (transport-specific) limit on the rpc payload. |
| 1373 | */ |
| 1374 | u32 svc_max_payload(const struct svc_rqst *rqstp) |
| 1375 | { |
Tom Tucker | 4902315 | 2007-12-30 21:07:21 -0600 | [diff] [blame] | 1376 | u32 max = rqstp->rq_xprt->xpt_class->xcl_max_payload; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1377 | |
NeilBrown | c6b0a9f | 2006-10-06 00:44:05 -0700 | [diff] [blame] | 1378 | if (rqstp->rq_server->sv_max_payload < max) |
| 1379 | max = rqstp->rq_server->sv_max_payload; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 1380 | return max; |
| 1381 | } |
| 1382 | EXPORT_SYMBOL_GPL(svc_max_payload); |