Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfssvc.c | |
3 | * | |
4 | * Central processing for nfsd. | |
5 | * | |
6 | * Authors: Olaf Kirch (okir@monad.swb.de) | |
7 | * | |
8 | * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> | |
9 | */ | |
10 | ||
1da177e4 | 11 | #include <linux/module.h> |
e8edc6e0 | 12 | #include <linux/sched.h> |
1da177e4 LT |
13 | #include <linux/time.h> |
14 | #include <linux/errno.h> | |
15 | #include <linux/nfs.h> | |
16 | #include <linux/in.h> | |
17 | #include <linux/uio.h> | |
18 | #include <linux/unistd.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/smp.h> | |
21 | #include <linux/smp_lock.h> | |
83144186 | 22 | #include <linux/freezer.h> |
1da177e4 | 23 | #include <linux/fs_struct.h> |
9867d76c | 24 | #include <linux/kthread.h> |
c3d06f9c | 25 | #include <linux/swap.h> |
1da177e4 LT |
26 | |
27 | #include <linux/sunrpc/types.h> | |
28 | #include <linux/sunrpc/stats.h> | |
29 | #include <linux/sunrpc/svc.h> | |
30 | #include <linux/sunrpc/svcsock.h> | |
31 | #include <linux/sunrpc/cache.h> | |
32 | #include <linux/nfsd/nfsd.h> | |
33 | #include <linux/nfsd/stats.h> | |
34 | #include <linux/nfsd/cache.h> | |
70c3b76c | 35 | #include <linux/nfsd/syscall.h> |
1da177e4 | 36 | #include <linux/lockd/bind.h> |
a257cdd0 | 37 | #include <linux/nfsacl.h> |
1da177e4 LT |
38 | |
39 | #define NFSDDBG_FACILITY NFSDDBG_SVC | |
40 | ||
1da177e4 | 41 | extern struct svc_program nfsd_program; |
9867d76c | 42 | static int nfsd(void *vrqstp); |
1da177e4 | 43 | struct timeval nfssvc_boot; |
1da177e4 | 44 | |
bedbdd8b NB |
45 | /* |
46 | * nfsd_mutex protects nfsd_serv -- both the pointer itself and the members | |
47 | * of the svc_serv struct. In particular, ->sv_nrthreads but also to some | |
48 | * extent ->sv_temp_socks and ->sv_permsocks. It also protects nfsdstats.th_cnt | |
49 | * | |
50 | * If (out side the lock) nfsd_serv is non-NULL, then it must point to a | |
51 | * properly initialised 'struct svc_serv' with ->sv_nrthreads > 0. That number | |
52 | * of nfsd threads must exist and each must listed in ->sp_all_threads in each | |
53 | * entry of ->sv_pools[]. | |
54 | * | |
55 | * Transitions of the thread count between zero and non-zero are of particular | |
56 | * interest since the svc_serv needs to be created and initialized at that | |
57 | * point, or freed. | |
3dd98a3b JL |
58 | * |
59 | * Finally, the nfsd_mutex also protects some of the global variables that are | |
60 | * accessed when nfsd starts and that are settable via the write_* routines in | |
61 | * nfsctl.c. In particular: | |
62 | * | |
63 | * user_recovery_dirname | |
64 | * user_lease_time | |
65 | * nfsd_versions | |
bedbdd8b NB |
66 | */ |
67 | DEFINE_MUTEX(nfsd_mutex); | |
68 | struct svc_serv *nfsd_serv; | |
69 | ||
3fb803a9 AG |
70 | #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) |
71 | static struct svc_stat nfsd_acl_svcstats; | |
72 | static struct svc_version * nfsd_acl_version[] = { | |
73 | [2] = &nfsd_acl_version2, | |
74 | [3] = &nfsd_acl_version3, | |
75 | }; | |
76 | ||
77 | #define NFSD_ACL_MINVERS 2 | |
e8c96f8c | 78 | #define NFSD_ACL_NRVERS ARRAY_SIZE(nfsd_acl_version) |
3fb803a9 AG |
79 | static struct svc_version *nfsd_acl_versions[NFSD_ACL_NRVERS]; |
80 | ||
81 | static struct svc_program nfsd_acl_program = { | |
82 | .pg_prog = NFS_ACL_PROGRAM, | |
83 | .pg_nvers = NFSD_ACL_NRVERS, | |
84 | .pg_vers = nfsd_acl_versions, | |
1a8eff6d | 85 | .pg_name = "nfsacl", |
3fb803a9 AG |
86 | .pg_class = "nfsd", |
87 | .pg_stats = &nfsd_acl_svcstats, | |
88 | .pg_authenticate = &svc_set_client, | |
89 | }; | |
90 | ||
91 | static struct svc_stat nfsd_acl_svcstats = { | |
92 | .program = &nfsd_acl_program, | |
93 | }; | |
94 | #endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */ | |
95 | ||
70c3b76c N |
96 | static struct svc_version * nfsd_version[] = { |
97 | [2] = &nfsd_version2, | |
98 | #if defined(CONFIG_NFSD_V3) | |
99 | [3] = &nfsd_version3, | |
100 | #endif | |
101 | #if defined(CONFIG_NFSD_V4) | |
102 | [4] = &nfsd_version4, | |
103 | #endif | |
104 | }; | |
105 | ||
106 | #define NFSD_MINVERS 2 | |
e8c96f8c | 107 | #define NFSD_NRVERS ARRAY_SIZE(nfsd_version) |
70c3b76c N |
108 | static struct svc_version *nfsd_versions[NFSD_NRVERS]; |
109 | ||
110 | struct svc_program nfsd_program = { | |
3fb803a9 AG |
111 | #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) |
112 | .pg_next = &nfsd_acl_program, | |
113 | #endif | |
70c3b76c N |
114 | .pg_prog = NFS_PROGRAM, /* program number */ |
115 | .pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */ | |
116 | .pg_vers = nfsd_versions, /* version table */ | |
117 | .pg_name = "nfsd", /* program name */ | |
118 | .pg_class = "nfsd", /* authentication class */ | |
119 | .pg_stats = &nfsd_svcstats, /* version table */ | |
120 | .pg_authenticate = &svc_set_client, /* export authentication */ | |
121 | ||
122 | }; | |
123 | ||
6658d3a7 N |
124 | int nfsd_vers(int vers, enum vers_op change) |
125 | { | |
126 | if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS) | |
127 | return -1; | |
128 | switch(change) { | |
129 | case NFSD_SET: | |
130 | nfsd_versions[vers] = nfsd_version[vers]; | |
6658d3a7 N |
131 | #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) |
132 | if (vers < NFSD_ACL_NRVERS) | |
1a8eff6d | 133 | nfsd_acl_versions[vers] = nfsd_acl_version[vers]; |
6658d3a7 | 134 | #endif |
1a8eff6d | 135 | break; |
6658d3a7 N |
136 | case NFSD_CLEAR: |
137 | nfsd_versions[vers] = NULL; | |
138 | #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) | |
139 | if (vers < NFSD_ACL_NRVERS) | |
1a8eff6d | 140 | nfsd_acl_versions[vers] = NULL; |
6658d3a7 N |
141 | #endif |
142 | break; | |
143 | case NFSD_TEST: | |
144 | return nfsd_versions[vers] != NULL; | |
145 | case NFSD_AVAIL: | |
146 | return nfsd_version[vers] != NULL; | |
147 | } | |
148 | return 0; | |
149 | } | |
1da177e4 LT |
150 | /* |
151 | * Maximum number of nfsd processes | |
152 | */ | |
153 | #define NFSD_MAXSERVS 8192 | |
154 | ||
155 | int nfsd_nrthreads(void) | |
156 | { | |
c7d106c9 NB |
157 | int rv = 0; |
158 | mutex_lock(&nfsd_mutex); | |
159 | if (nfsd_serv) | |
160 | rv = nfsd_serv->sv_nrthreads; | |
161 | mutex_unlock(&nfsd_mutex); | |
162 | return rv; | |
1da177e4 LT |
163 | } |
164 | ||
bc591ccf N |
165 | static void nfsd_last_thread(struct svc_serv *serv) |
166 | { | |
167 | /* When last nfsd thread exits we need to do some clean-up */ | |
7a182083 TT |
168 | struct svc_xprt *xprt; |
169 | list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) | |
24e36663 | 170 | lockd_down(); |
bc591ccf N |
171 | nfsd_serv = NULL; |
172 | nfsd_racache_shutdown(); | |
173 | nfs4_state_shutdown(); | |
174 | ||
e096bbc6 JL |
175 | printk(KERN_WARNING "nfsd: last server has exited, flushing export " |
176 | "cache\n"); | |
177 | nfsd_export_flush(); | |
bc591ccf | 178 | } |
6658d3a7 N |
179 | |
180 | void nfsd_reset_versions(void) | |
181 | { | |
182 | int found_one = 0; | |
183 | int i; | |
184 | ||
185 | for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) { | |
186 | if (nfsd_program.pg_vers[i]) | |
187 | found_one = 1; | |
188 | } | |
189 | ||
190 | if (!found_one) { | |
191 | for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) | |
192 | nfsd_program.pg_vers[i] = nfsd_version[i]; | |
193 | #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) | |
194 | for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++) | |
195 | nfsd_acl_program.pg_vers[i] = | |
196 | nfsd_acl_version[i]; | |
197 | #endif | |
198 | } | |
199 | } | |
200 | ||
c3d06f9c AA |
201 | /* |
202 | * Each session guarantees a negotiated per slot memory cache for replies | |
203 | * which in turn consumes memory beyond the v2/v3/v4.0 server. A dedicated | |
204 | * NFSv4.1 server might want to use more memory for a DRC than a machine | |
205 | * with mutiple services. | |
206 | * | |
207 | * Impose a hard limit on the number of pages for the DRC which varies | |
208 | * according to the machines free pages. This is of course only a default. | |
209 | * | |
210 | * For now this is a #defined shift which could be under admin control | |
211 | * in the future. | |
212 | */ | |
213 | static void set_max_drc(void) | |
214 | { | |
215 | nfsd_serv->sv_drc_max_pages = nr_free_buffer_pages() | |
216 | >> NFSD_DRC_SIZE_SHIFT; | |
217 | nfsd_serv->sv_drc_pages_used = 0; | |
218 | dprintk("%s svc_drc_max_pages %u\n", __func__, | |
219 | nfsd_serv->sv_drc_max_pages); | |
220 | } | |
bedbdd8b | 221 | |
b41b66d6 | 222 | int nfsd_create_serv(void) |
02a375f0 N |
223 | { |
224 | int err = 0; | |
bedbdd8b NB |
225 | |
226 | WARN_ON(!mutex_is_locked(&nfsd_mutex)); | |
02a375f0 | 227 | if (nfsd_serv) { |
9a24ab57 | 228 | svc_get(nfsd_serv); |
02a375f0 N |
229 | return 0; |
230 | } | |
596bbe53 N |
231 | if (nfsd_max_blksize == 0) { |
232 | /* choose a suitable default */ | |
233 | struct sysinfo i; | |
234 | si_meminfo(&i); | |
235 | /* Aim for 1/4096 of memory per thread | |
236 | * This gives 1MB on 4Gig machines | |
237 | * But only uses 32K on 128M machines. | |
238 | * Bottom out at 8K on 32M and smaller. | |
239 | * Of course, this is only a default. | |
240 | */ | |
241 | nfsd_max_blksize = NFSSVC_MAXBLKSIZE; | |
44c55600 | 242 | i.totalram <<= PAGE_SHIFT - 12; |
596bbe53 N |
243 | while (nfsd_max_blksize > i.totalram && |
244 | nfsd_max_blksize >= 8*1024*2) | |
245 | nfsd_max_blksize /= 2; | |
246 | } | |
02a375f0 | 247 | |
e096bbc6 | 248 | nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize, |
e851db5b | 249 | AF_INET, |
a75c5d01 | 250 | nfsd_last_thread, nfsd, THIS_MODULE); |
02a375f0 N |
251 | if (nfsd_serv == NULL) |
252 | err = -ENOMEM; | |
c3d06f9c AA |
253 | else |
254 | set_max_drc(); | |
bedbdd8b | 255 | |
02a375f0 N |
256 | do_gettimeofday(&nfssvc_boot); /* record boot time */ |
257 | return err; | |
258 | } | |
259 | ||
260 | static int nfsd_init_socks(int port) | |
261 | { | |
262 | int error; | |
263 | if (!list_empty(&nfsd_serv->sv_permsocks)) | |
264 | return 0; | |
265 | ||
26a41409 | 266 | error = svc_create_xprt(nfsd_serv, "udp", port, |
482fb94e | 267 | SVC_SOCK_DEFAULTS); |
02a375f0 N |
268 | if (error < 0) |
269 | return error; | |
270 | ||
1cd9cd16 CL |
271 | error = lockd_up(); |
272 | if (error < 0) | |
273 | return error; | |
274 | ||
26a41409 | 275 | error = svc_create_xprt(nfsd_serv, "tcp", port, |
482fb94e | 276 | SVC_SOCK_DEFAULTS); |
02a375f0 N |
277 | if (error < 0) |
278 | return error; | |
26a41409 CL |
279 | |
280 | error = lockd_up(); | |
281 | if (error < 0) | |
282 | return error; | |
283 | ||
02a375f0 N |
284 | return 0; |
285 | } | |
286 | ||
eed2965a GB |
287 | int nfsd_nrpools(void) |
288 | { | |
289 | if (nfsd_serv == NULL) | |
290 | return 0; | |
291 | else | |
292 | return nfsd_serv->sv_nrpools; | |
293 | } | |
294 | ||
295 | int nfsd_get_nrthreads(int n, int *nthreads) | |
296 | { | |
297 | int i = 0; | |
298 | ||
299 | if (nfsd_serv != NULL) { | |
300 | for (i = 0; i < nfsd_serv->sv_nrpools && i < n; i++) | |
301 | nthreads[i] = nfsd_serv->sv_pools[i].sp_nrthreads; | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | int nfsd_set_nrthreads(int n, int *nthreads) | |
308 | { | |
309 | int i = 0; | |
310 | int tot = 0; | |
311 | int err = 0; | |
312 | ||
bedbdd8b NB |
313 | WARN_ON(!mutex_is_locked(&nfsd_mutex)); |
314 | ||
eed2965a GB |
315 | if (nfsd_serv == NULL || n <= 0) |
316 | return 0; | |
317 | ||
318 | if (n > nfsd_serv->sv_nrpools) | |
319 | n = nfsd_serv->sv_nrpools; | |
320 | ||
321 | /* enforce a global maximum number of threads */ | |
322 | tot = 0; | |
323 | for (i = 0; i < n; i++) { | |
324 | if (nthreads[i] > NFSD_MAXSERVS) | |
325 | nthreads[i] = NFSD_MAXSERVS; | |
326 | tot += nthreads[i]; | |
327 | } | |
328 | if (tot > NFSD_MAXSERVS) { | |
329 | /* total too large: scale down requested numbers */ | |
330 | for (i = 0; i < n && tot > 0; i++) { | |
331 | int new = nthreads[i] * NFSD_MAXSERVS / tot; | |
332 | tot -= (nthreads[i] - new); | |
333 | nthreads[i] = new; | |
334 | } | |
335 | for (i = 0; i < n && tot > 0; i++) { | |
336 | nthreads[i]--; | |
337 | tot--; | |
338 | } | |
339 | } | |
340 | ||
341 | /* | |
342 | * There must always be a thread in pool 0; the admin | |
343 | * can't shut down NFS completely using pool_threads. | |
344 | */ | |
345 | if (nthreads[0] == 0) | |
346 | nthreads[0] = 1; | |
347 | ||
348 | /* apply the new numbers */ | |
eed2965a GB |
349 | svc_get(nfsd_serv); |
350 | for (i = 0; i < n; i++) { | |
351 | err = svc_set_num_threads(nfsd_serv, &nfsd_serv->sv_pools[i], | |
352 | nthreads[i]); | |
353 | if (err) | |
354 | break; | |
355 | } | |
356 | svc_destroy(nfsd_serv); | |
eed2965a GB |
357 | |
358 | return err; | |
359 | } | |
360 | ||
1da177e4 LT |
361 | int |
362 | nfsd_svc(unsigned short port, int nrservs) | |
363 | { | |
364 | int error; | |
bedbdd8b NB |
365 | |
366 | mutex_lock(&nfsd_mutex); | |
6658d3a7 | 367 | dprintk("nfsd: creating service\n"); |
1da177e4 LT |
368 | error = -EINVAL; |
369 | if (nrservs <= 0) | |
370 | nrservs = 0; | |
371 | if (nrservs > NFSD_MAXSERVS) | |
372 | nrservs = NFSD_MAXSERVS; | |
373 | ||
374 | /* Readahead param cache - will no-op if it already exists */ | |
375 | error = nfsd_racache_init(2*nrservs); | |
376 | if (error<0) | |
377 | goto out; | |
e8ff2a84 | 378 | nfs4_state_start(); |
02a375f0 N |
379 | |
380 | nfsd_reset_versions(); | |
381 | ||
382 | error = nfsd_create_serv(); | |
383 | ||
384 | if (error) | |
385 | goto out; | |
386 | error = nfsd_init_socks(port); | |
387 | if (error) | |
388 | goto failure; | |
389 | ||
eec09661 | 390 | error = svc_set_num_threads(nfsd_serv, NULL, nrservs); |
1da177e4 | 391 | failure: |
1da177e4 | 392 | svc_destroy(nfsd_serv); /* Release server */ |
1da177e4 | 393 | out: |
bedbdd8b | 394 | mutex_unlock(&nfsd_mutex); |
1da177e4 LT |
395 | return error; |
396 | } | |
397 | ||
1da177e4 LT |
398 | |
399 | /* | |
400 | * This is the NFS server kernel thread | |
401 | */ | |
9867d76c JL |
402 | static int |
403 | nfsd(void *vrqstp) | |
1da177e4 | 404 | { |
9867d76c | 405 | struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp; |
1da177e4 | 406 | struct fs_struct *fsp; |
9867d76c | 407 | int err, preverr = 0; |
1da177e4 LT |
408 | |
409 | /* Lock module and set up kernel thread */ | |
bedbdd8b | 410 | mutex_lock(&nfsd_mutex); |
1da177e4 | 411 | |
9867d76c | 412 | /* At this point, the thread shares current->fs |
1da177e4 LT |
413 | * with the init process. We need to create files with a |
414 | * umask of 0 instead of init's umask. */ | |
415 | fsp = copy_fs_struct(current->fs); | |
416 | if (!fsp) { | |
417 | printk("Unable to start nfsd thread: out of memory\n"); | |
418 | goto out; | |
419 | } | |
420 | exit_fs(current); | |
421 | current->fs = fsp; | |
422 | current->fs->umask = 0; | |
423 | ||
9867d76c JL |
424 | /* |
425 | * thread is spawned with all signals set to SIG_IGN, re-enable | |
100766f8 | 426 | * the ones that will bring down the thread |
9867d76c | 427 | */ |
100766f8 JL |
428 | allow_signal(SIGKILL); |
429 | allow_signal(SIGHUP); | |
430 | allow_signal(SIGINT); | |
431 | allow_signal(SIGQUIT); | |
bedbdd8b | 432 | |
1da177e4 | 433 | nfsdstats.th_cnt++; |
bedbdd8b NB |
434 | mutex_unlock(&nfsd_mutex); |
435 | ||
1da177e4 LT |
436 | /* |
437 | * We want less throttling in balance_dirty_pages() so that nfs to | |
438 | * localhost doesn't cause nfsd to lock up due to all the client's | |
439 | * dirty pages. | |
440 | */ | |
441 | current->flags |= PF_LESS_THROTTLE; | |
83144186 | 442 | set_freezable(); |
1da177e4 LT |
443 | |
444 | /* | |
445 | * The main request loop | |
446 | */ | |
447 | for (;;) { | |
1da177e4 LT |
448 | /* |
449 | * Find a socket with data available and call its | |
450 | * recvfrom routine. | |
451 | */ | |
6fb2b47f | 452 | while ((err = svc_recv(rqstp, 60*60*HZ)) == -EAGAIN) |
1da177e4 | 453 | ; |
9867d76c | 454 | if (err == -EINTR) |
1da177e4 | 455 | break; |
9867d76c JL |
456 | else if (err < 0) { |
457 | if (err != preverr) { | |
458 | printk(KERN_WARNING "%s: unexpected error " | |
459 | "from svc_recv (%d)\n", __func__, -err); | |
460 | preverr = err; | |
461 | } | |
462 | schedule_timeout_uninterruptible(HZ); | |
463 | continue; | |
464 | } | |
465 | ||
1da177e4 LT |
466 | |
467 | /* Lock the export hash tables for reading. */ | |
468 | exp_readlock(); | |
469 | ||
6fb2b47f | 470 | svc_process(rqstp); |
1da177e4 LT |
471 | |
472 | /* Unlock export hash tables */ | |
473 | exp_readunlock(); | |
1da177e4 LT |
474 | } |
475 | ||
24e36663 | 476 | /* Clear signals before calling svc_exit_thread() */ |
9e416052 | 477 | flush_signals(current); |
1da177e4 | 478 | |
bedbdd8b | 479 | mutex_lock(&nfsd_mutex); |
1da177e4 LT |
480 | nfsdstats.th_cnt --; |
481 | ||
482 | out: | |
483 | /* Release the thread */ | |
484 | svc_exit_thread(rqstp); | |
485 | ||
486 | /* Release module */ | |
bedbdd8b | 487 | mutex_unlock(&nfsd_mutex); |
1da177e4 | 488 | module_put_and_exit(0); |
9867d76c | 489 | return 0; |
1da177e4 LT |
490 | } |
491 | ||
32c1eb0c AA |
492 | static __be32 map_new_errors(u32 vers, __be32 nfserr) |
493 | { | |
494 | if (nfserr == nfserr_jukebox && vers == 2) | |
495 | return nfserr_dropit; | |
496 | if (nfserr == nfserr_wrongsec && vers < 4) | |
497 | return nfserr_acces; | |
498 | return nfserr; | |
499 | } | |
500 | ||
1da177e4 | 501 | int |
c7afef1f | 502 | nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp) |
1da177e4 LT |
503 | { |
504 | struct svc_procedure *proc; | |
505 | kxdrproc_t xdr; | |
ad451d38 AV |
506 | __be32 nfserr; |
507 | __be32 *nfserrp; | |
1da177e4 LT |
508 | |
509 | dprintk("nfsd_dispatch: vers %d proc %d\n", | |
510 | rqstp->rq_vers, rqstp->rq_proc); | |
511 | proc = rqstp->rq_procinfo; | |
512 | ||
513 | /* Check whether we have this call in the cache. */ | |
514 | switch (nfsd_cache_lookup(rqstp, proc->pc_cachetype)) { | |
515 | case RC_INTR: | |
516 | case RC_DROPIT: | |
517 | return 0; | |
518 | case RC_REPLY: | |
519 | return 1; | |
520 | case RC_DOIT:; | |
521 | /* do it */ | |
522 | } | |
523 | ||
524 | /* Decode arguments */ | |
525 | xdr = proc->pc_decode; | |
ad451d38 | 526 | if (xdr && !xdr(rqstp, (__be32*)rqstp->rq_arg.head[0].iov_base, |
1da177e4 LT |
527 | rqstp->rq_argp)) { |
528 | dprintk("nfsd: failed to decode arguments!\n"); | |
529 | nfsd_cache_update(rqstp, RC_NOCACHE, NULL); | |
530 | *statp = rpc_garbage_args; | |
531 | return 1; | |
532 | } | |
533 | ||
534 | /* need to grab the location to store the status, as | |
535 | * nfsv4 does some encoding while processing | |
536 | */ | |
537 | nfserrp = rqstp->rq_res.head[0].iov_base | |
538 | + rqstp->rq_res.head[0].iov_len; | |
ad451d38 | 539 | rqstp->rq_res.head[0].iov_len += sizeof(__be32); |
1da177e4 | 540 | |
074fe897 AA |
541 | /* NFSv4.1 DRC requires statp */ |
542 | if (rqstp->rq_vers == 4) | |
543 | nfsd4_set_statp(rqstp, statp); | |
544 | ||
1da177e4 LT |
545 | /* Now call the procedure handler, and encode NFS status. */ |
546 | nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp); | |
32c1eb0c | 547 | nfserr = map_new_errors(rqstp->rq_vers, nfserr); |
1da177e4 | 548 | if (nfserr == nfserr_dropit) { |
45457e09 | 549 | dprintk("nfsd: Dropping request; may be revisited later\n"); |
1da177e4 LT |
550 | nfsd_cache_update(rqstp, RC_NOCACHE, NULL); |
551 | return 0; | |
552 | } | |
553 | ||
554 | if (rqstp->rq_proc != 0) | |
555 | *nfserrp++ = nfserr; | |
556 | ||
557 | /* Encode result. | |
558 | * For NFSv2, additional info is never returned in case of an error. | |
559 | */ | |
560 | if (!(nfserr && rqstp->rq_vers == 2)) { | |
561 | xdr = proc->pc_encode; | |
562 | if (xdr && !xdr(rqstp, nfserrp, | |
563 | rqstp->rq_resp)) { | |
564 | /* Failed to encode result. Release cache entry */ | |
565 | dprintk("nfsd: failed to encode result!\n"); | |
566 | nfsd_cache_update(rqstp, RC_NOCACHE, NULL); | |
567 | *statp = rpc_system_err; | |
568 | return 1; | |
569 | } | |
570 | } | |
571 | ||
572 | /* Store reply in cache. */ | |
573 | nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1); | |
574 | return 1; | |
575 | } | |
03cf6c9f GB |
576 | |
577 | int nfsd_pool_stats_open(struct inode *inode, struct file *file) | |
578 | { | |
579 | if (nfsd_serv == NULL) | |
580 | return -ENODEV; | |
581 | return svc_pool_stats_open(nfsd_serv, file); | |
582 | } |