1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Syscall interface to knfsd. |
4 | * |
5 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
6 | */ |
7 | |
8 | #include <linux/slab.h> |
9 | #include <linux/namei.h> |
10 | #include <linux/ctype.h> |
11 | #include <linux/fs_context.h> |
12 | |
13 | #include <linux/sunrpc/svcsock.h> |
14 | #include <linux/lockd/lockd.h> |
15 | #include <linux/sunrpc/addr.h> |
16 | #include <linux/sunrpc/gss_api.h> |
17 | #include <linux/sunrpc/rpc_pipe_fs.h> |
18 | #include <linux/module.h> |
19 | #include <linux/fsnotify.h> |
20 | |
21 | #include "idmap.h" |
22 | #include "nfsd.h" |
23 | #include "cache.h" |
24 | #include "state.h" |
25 | #include "netns.h" |
26 | #include "pnfs.h" |
27 | #include "filecache.h" |
28 | #include "trace.h" |
29 | #include "netlink.h" |
30 | |
31 | /* |
32 | * We have a single directory with several nodes in it. |
33 | */ |
34 | enum { |
35 | NFSD_Root = 1, |
36 | NFSD_List, |
37 | NFSD_Export_Stats, |
38 | NFSD_Export_features, |
39 | NFSD_Fh, |
40 | NFSD_FO_UnlockIP, |
41 | NFSD_FO_UnlockFS, |
42 | NFSD_Threads, |
43 | NFSD_Pool_Threads, |
44 | NFSD_Pool_Stats, |
45 | NFSD_Reply_Cache_Stats, |
46 | NFSD_Versions, |
47 | NFSD_Ports, |
48 | NFSD_MaxBlkSize, |
49 | NFSD_MaxConnections, |
50 | NFSD_Filecache, |
51 | /* |
52 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] |
53 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops |
54 | */ |
55 | #ifdef CONFIG_NFSD_V4 |
56 | NFSD_Leasetime, |
57 | NFSD_Gracetime, |
58 | NFSD_RecoveryDir, |
59 | NFSD_V4EndGrace, |
60 | #endif |
61 | NFSD_MaxReserved |
62 | }; |
63 | |
64 | /* |
65 | * write() for these nodes. |
66 | */ |
67 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
68 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
69 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); |
70 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
71 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
72 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
73 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
74 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
75 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); |
76 | #ifdef CONFIG_NFSD_V4 |
77 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
78 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
79 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
80 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); |
81 | #endif |
82 | |
83 | static ssize_t (*const write_op[])(struct file *, char *, size_t) = { |
84 | [NFSD_Fh] = write_filehandle, |
85 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
86 | [NFSD_FO_UnlockFS] = write_unlock_fs, |
87 | [NFSD_Threads] = write_threads, |
88 | [NFSD_Pool_Threads] = write_pool_threads, |
89 | [NFSD_Versions] = write_versions, |
90 | [NFSD_Ports] = write_ports, |
91 | [NFSD_MaxBlkSize] = write_maxblksize, |
92 | [NFSD_MaxConnections] = write_maxconn, |
93 | #ifdef CONFIG_NFSD_V4 |
94 | [NFSD_Leasetime] = write_leasetime, |
95 | [NFSD_Gracetime] = write_gracetime, |
96 | [NFSD_RecoveryDir] = write_recoverydir, |
97 | [NFSD_V4EndGrace] = write_v4_end_grace, |
98 | #endif |
99 | }; |
100 | |
101 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) |
102 | { |
103 | ino_t ino = file_inode(f: file)->i_ino; |
104 | char *data; |
105 | ssize_t rv; |
106 | |
107 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
108 | return -EINVAL; |
109 | |
110 | data = simple_transaction_get(file, buf, size); |
111 | if (IS_ERR(ptr: data)) |
112 | return PTR_ERR(ptr: data); |
113 | |
114 | rv = write_op[ino](file, data, size); |
115 | if (rv < 0) |
116 | return rv; |
117 | |
118 | simple_transaction_set(file, n: rv); |
119 | return size; |
120 | } |
121 | |
122 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
123 | { |
124 | if (! file->private_data) { |
125 | /* An attempt to read a transaction file without writing |
126 | * causes a 0-byte write so that the file can return |
127 | * state information |
128 | */ |
129 | ssize_t rv = nfsctl_transaction_write(file, buf, size: 0, pos); |
130 | if (rv < 0) |
131 | return rv; |
132 | } |
133 | return simple_transaction_read(file, buf, size, pos); |
134 | } |
135 | |
136 | static const struct file_operations transaction_ops = { |
137 | .write = nfsctl_transaction_write, |
138 | .read = nfsctl_transaction_read, |
139 | .release = simple_transaction_release, |
140 | .llseek = default_llseek, |
141 | }; |
142 | |
143 | static int exports_net_open(struct net *net, struct file *file) |
144 | { |
145 | int err; |
146 | struct seq_file *seq; |
147 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
148 | |
149 | err = seq_open(file, &nfs_exports_op); |
150 | if (err) |
151 | return err; |
152 | |
153 | seq = file->private_data; |
154 | seq->private = nn->svc_export_cache; |
155 | return 0; |
156 | } |
157 | |
158 | static int exports_nfsd_open(struct inode *inode, struct file *file) |
159 | { |
160 | return exports_net_open(net: inode->i_sb->s_fs_info, file); |
161 | } |
162 | |
163 | static const struct file_operations exports_nfsd_operations = { |
164 | .open = exports_nfsd_open, |
165 | .read = seq_read, |
166 | .llseek = seq_lseek, |
167 | .release = seq_release, |
168 | }; |
169 | |
170 | static int export_features_show(struct seq_file *m, void *v) |
171 | { |
172 | seq_printf(m, fmt: "0x%x 0x%x\n" , NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); |
173 | return 0; |
174 | } |
175 | |
176 | DEFINE_SHOW_ATTRIBUTE(export_features); |
177 | |
178 | static const struct file_operations pool_stats_operations = { |
179 | .open = nfsd_pool_stats_open, |
180 | .read = seq_read, |
181 | .llseek = seq_lseek, |
182 | .release = nfsd_pool_stats_release, |
183 | }; |
184 | |
185 | DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); |
186 | |
187 | DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); |
188 | |
189 | /*----------------------------------------------------------------------------*/ |
190 | /* |
191 | * payload - write methods |
192 | */ |
193 | |
194 | static inline struct net *netns(struct file *file) |
195 | { |
196 | return file_inode(f: file)->i_sb->s_fs_info; |
197 | } |
198 | |
199 | /* |
200 | * write_unlock_ip - Release all locks used by a client |
201 | * |
202 | * Experimental. |
203 | * |
204 | * Input: |
205 | * buf: '\n'-terminated C string containing a |
206 | * presentation format IP address |
207 | * size: length of C string in @buf |
208 | * Output: |
209 | * On success: returns zero if all specified locks were released; |
210 | * returns one if one or more locks were not released |
211 | * On error: return code is negative errno value |
212 | */ |
213 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
214 | { |
215 | struct sockaddr_storage address; |
216 | struct sockaddr *sap = (struct sockaddr *)&address; |
217 | size_t salen = sizeof(address); |
218 | char *fo_path; |
219 | struct net *net = netns(file); |
220 | |
221 | /* sanity check */ |
222 | if (size == 0) |
223 | return -EINVAL; |
224 | |
225 | if (buf[size-1] != '\n') |
226 | return -EINVAL; |
227 | |
228 | fo_path = buf; |
229 | if (qword_get(bpp: &buf, dest: fo_path, bufsize: size) < 0) |
230 | return -EINVAL; |
231 | |
232 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) |
233 | return -EINVAL; |
234 | |
235 | trace_nfsd_ctl_unlock_ip(net, address: buf); |
236 | return nlmsvc_unlock_all_by_ip(server_addr: sap); |
237 | } |
238 | |
239 | /* |
240 | * write_unlock_fs - Release all locks on a local file system |
241 | * |
242 | * Experimental. |
243 | * |
244 | * Input: |
245 | * buf: '\n'-terminated C string containing the |
246 | * absolute pathname of a local file system |
247 | * size: length of C string in @buf |
248 | * Output: |
249 | * On success: returns zero if all specified locks were released; |
250 | * returns one if one or more locks were not released |
251 | * On error: return code is negative errno value |
252 | */ |
253 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
254 | { |
255 | struct path path; |
256 | char *fo_path; |
257 | int error; |
258 | |
259 | /* sanity check */ |
260 | if (size == 0) |
261 | return -EINVAL; |
262 | |
263 | if (buf[size-1] != '\n') |
264 | return -EINVAL; |
265 | |
266 | fo_path = buf; |
267 | if (qword_get(bpp: &buf, dest: fo_path, bufsize: size) < 0) |
268 | return -EINVAL; |
269 | trace_nfsd_ctl_unlock_fs(net: netns(file), path: fo_path); |
270 | error = kern_path(fo_path, 0, &path); |
271 | if (error) |
272 | return error; |
273 | |
274 | /* |
275 | * XXX: Needs better sanity checking. Otherwise we could end up |
276 | * releasing locks on the wrong file system. |
277 | * |
278 | * For example: |
279 | * 1. Does the path refer to a directory? |
280 | * 2. Is that directory a mount point, or |
281 | * 3. Is that directory the root of an exported file system? |
282 | */ |
283 | error = nlmsvc_unlock_all_by_sb(sb: path.dentry->d_sb); |
284 | |
285 | path_put(&path); |
286 | return error; |
287 | } |
288 | |
289 | /* |
290 | * write_filehandle - Get a variable-length NFS file handle by path |
291 | * |
292 | * On input, the buffer contains a '\n'-terminated C string comprised of |
293 | * three alphanumeric words separated by whitespace. The string may |
294 | * contain escape sequences. |
295 | * |
296 | * Input: |
297 | * buf: |
298 | * domain: client domain name |
299 | * path: export pathname |
300 | * maxsize: numeric maximum size of |
301 | * @buf |
302 | * size: length of C string in @buf |
303 | * Output: |
304 | * On success: passed-in buffer filled with '\n'-terminated C |
305 | * string containing a ASCII hex text version |
306 | * of the NFS file handle; |
307 | * return code is the size in bytes of the string |
308 | * On error: return code is negative errno value |
309 | */ |
310 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
311 | { |
312 | char *dname, *path; |
313 | int maxsize; |
314 | char *mesg = buf; |
315 | int len; |
316 | struct auth_domain *dom; |
317 | struct knfsd_fh fh; |
318 | |
319 | if (size == 0) |
320 | return -EINVAL; |
321 | |
322 | if (buf[size-1] != '\n') |
323 | return -EINVAL; |
324 | buf[size-1] = 0; |
325 | |
326 | dname = mesg; |
327 | len = qword_get(bpp: &mesg, dest: dname, bufsize: size); |
328 | if (len <= 0) |
329 | return -EINVAL; |
330 | |
331 | path = dname+len+1; |
332 | len = qword_get(bpp: &mesg, dest: path, bufsize: size); |
333 | if (len <= 0) |
334 | return -EINVAL; |
335 | |
336 | len = get_int(bpp: &mesg, anint: &maxsize); |
337 | if (len) |
338 | return len; |
339 | |
340 | if (maxsize < NFS_FHSIZE) |
341 | return -EINVAL; |
342 | maxsize = min(maxsize, NFS3_FHSIZE); |
343 | |
344 | if (qword_get(bpp: &mesg, dest: mesg, bufsize: size) > 0) |
345 | return -EINVAL; |
346 | |
347 | trace_nfsd_ctl_filehandle(net: netns(file), domain: dname, path, maxsize); |
348 | |
349 | /* we have all the words, they are in buf.. */ |
350 | dom = unix_domain_find(name: dname); |
351 | if (!dom) |
352 | return -ENOMEM; |
353 | |
354 | len = exp_rootfh(netns(file), dom, path, &fh, maxsize); |
355 | auth_domain_put(item: dom); |
356 | if (len) |
357 | return len; |
358 | |
359 | mesg = buf; |
360 | len = SIMPLE_TRANSACTION_LIMIT; |
361 | qword_addhex(bpp: &mesg, lp: &len, buf: fh.fh_raw, blen: fh.fh_size); |
362 | mesg[-1] = '\n'; |
363 | return mesg - buf; |
364 | } |
365 | |
366 | /* |
367 | * write_threads - Start NFSD, or report the current number of running threads |
368 | * |
369 | * Input: |
370 | * buf: ignored |
371 | * size: zero |
372 | * Output: |
373 | * On success: passed-in buffer filled with '\n'-terminated C |
374 | * string numeric value representing the number of |
375 | * running NFSD threads; |
376 | * return code is the size in bytes of the string |
377 | * On error: return code is zero |
378 | * |
379 | * OR |
380 | * |
381 | * Input: |
382 | * buf: C string containing an unsigned |
383 | * integer value representing the |
384 | * number of NFSD threads to start |
385 | * size: non-zero length of C string in @buf |
386 | * Output: |
387 | * On success: NFS service is started; |
388 | * passed-in buffer filled with '\n'-terminated C |
389 | * string numeric value representing the number of |
390 | * running NFSD threads; |
391 | * return code is the size in bytes of the string |
392 | * On error: return code is zero or a negative errno value |
393 | */ |
394 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
395 | { |
396 | char *mesg = buf; |
397 | int rv; |
398 | struct net *net = netns(file); |
399 | |
400 | if (size > 0) { |
401 | int newthreads; |
402 | rv = get_int(bpp: &mesg, anint: &newthreads); |
403 | if (rv) |
404 | return rv; |
405 | if (newthreads < 0) |
406 | return -EINVAL; |
407 | trace_nfsd_ctl_threads(net, newthreads); |
408 | rv = nfsd_svc(nrservs: newthreads, net, cred: file->f_cred); |
409 | if (rv < 0) |
410 | return rv; |
411 | } else |
412 | rv = nfsd_nrthreads(net); |
413 | |
414 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, fmt: "%d\n" , rv); |
415 | } |
416 | |
417 | /* |
418 | * write_pool_threads - Set or report the current number of threads per pool |
419 | * |
420 | * Input: |
421 | * buf: ignored |
422 | * size: zero |
423 | * |
424 | * OR |
425 | * |
426 | * Input: |
427 | * buf: C string containing whitespace- |
428 | * separated unsigned integer values |
429 | * representing the number of NFSD |
430 | * threads to start in each pool |
431 | * size: non-zero length of C string in @buf |
432 | * Output: |
433 | * On success: passed-in buffer filled with '\n'-terminated C |
434 | * string containing integer values representing the |
435 | * number of NFSD threads in each pool; |
436 | * return code is the size in bytes of the string |
437 | * On error: return code is zero or a negative errno value |
438 | */ |
439 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
440 | { |
441 | /* if size > 0, look for an array of number of threads per node |
442 | * and apply them then write out number of threads per node as reply |
443 | */ |
444 | char *mesg = buf; |
445 | int i; |
446 | int rv; |
447 | int len; |
448 | int npools; |
449 | int *nthreads; |
450 | struct net *net = netns(file); |
451 | |
452 | mutex_lock(&nfsd_mutex); |
453 | npools = nfsd_nrpools(net); |
454 | if (npools == 0) { |
455 | /* |
456 | * NFS is shut down. The admin can start it by |
457 | * writing to the threads file but NOT the pool_threads |
458 | * file, sorry. Report zero threads. |
459 | */ |
460 | mutex_unlock(lock: &nfsd_mutex); |
461 | strcpy(p: buf, q: "0\n" ); |
462 | return strlen(buf); |
463 | } |
464 | |
465 | nthreads = kcalloc(n: npools, size: sizeof(int), GFP_KERNEL); |
466 | rv = -ENOMEM; |
467 | if (nthreads == NULL) |
468 | goto out_free; |
469 | |
470 | if (size > 0) { |
471 | for (i = 0; i < npools; i++) { |
472 | rv = get_int(bpp: &mesg, anint: &nthreads[i]); |
473 | if (rv == -ENOENT) |
474 | break; /* fewer numbers than pools */ |
475 | if (rv) |
476 | goto out_free; /* syntax error */ |
477 | rv = -EINVAL; |
478 | if (nthreads[i] < 0) |
479 | goto out_free; |
480 | trace_nfsd_ctl_pool_threads(net, pool: i, nrthreads: nthreads[i]); |
481 | } |
482 | rv = nfsd_set_nrthreads(n: i, nthreads, net); |
483 | if (rv) |
484 | goto out_free; |
485 | } |
486 | |
487 | rv = nfsd_get_nrthreads(n: npools, nthreads, net); |
488 | if (rv) |
489 | goto out_free; |
490 | |
491 | mesg = buf; |
492 | size = SIMPLE_TRANSACTION_LIMIT; |
493 | for (i = 0; i < npools && size > 0; i++) { |
494 | snprintf(buf: mesg, size, fmt: "%d%c" , nthreads[i], (i == npools-1 ? '\n' : ' ')); |
495 | len = strlen(mesg); |
496 | size -= len; |
497 | mesg += len; |
498 | } |
499 | rv = mesg - buf; |
500 | out_free: |
501 | kfree(objp: nthreads); |
502 | mutex_unlock(lock: &nfsd_mutex); |
503 | return rv; |
504 | } |
505 | |
506 | static ssize_t |
507 | nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, |
508 | const char *sep, unsigned vers, int minor) |
509 | { |
510 | const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u" ; |
511 | bool supported = !!nfsd_vers(nn, vers, change: NFSD_TEST); |
512 | |
513 | if (vers == 4 && minor >= 0 && |
514 | !nfsd_minorversion(nn, minorversion: minor, change: NFSD_TEST)) |
515 | supported = false; |
516 | if (minor == 0 && supported) |
517 | /* |
518 | * special case for backward compatability. |
519 | * +4.0 is never reported, it is implied by |
520 | * +4, unless -4.0 is present. |
521 | */ |
522 | return 0; |
523 | return snprintf(buf, size: remaining, fmt: format, sep, |
524 | supported ? '+' : '-', vers, minor); |
525 | } |
526 | |
527 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
528 | { |
529 | char *mesg = buf; |
530 | char *vers, *minorp, sign; |
531 | int len, num, remaining; |
532 | ssize_t tlen = 0; |
533 | char *sep; |
534 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
535 | |
536 | if (size > 0) { |
537 | if (nn->nfsd_serv) |
538 | /* Cannot change versions without updating |
539 | * nn->nfsd_serv->sv_xdrsize, and reallocing |
540 | * rq_argp and rq_resp |
541 | */ |
542 | return -EBUSY; |
543 | if (buf[size-1] != '\n') |
544 | return -EINVAL; |
545 | buf[size-1] = 0; |
546 | trace_nfsd_ctl_version(net: netns(file), mesg: buf); |
547 | |
548 | vers = mesg; |
549 | len = qword_get(bpp: &mesg, dest: vers, bufsize: size); |
550 | if (len <= 0) return -EINVAL; |
551 | do { |
552 | enum vers_op cmd; |
553 | unsigned minor; |
554 | sign = *vers; |
555 | if (sign == '+' || sign == '-') |
556 | num = simple_strtol((vers+1), &minorp, 0); |
557 | else |
558 | num = simple_strtol(vers, &minorp, 0); |
559 | if (*minorp == '.') { |
560 | if (num != 4) |
561 | return -EINVAL; |
562 | if (kstrtouint(s: minorp+1, base: 0, res: &minor) < 0) |
563 | return -EINVAL; |
564 | } |
565 | |
566 | cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; |
567 | switch(num) { |
568 | #ifdef CONFIG_NFSD_V2 |
569 | case 2: |
570 | #endif |
571 | case 3: |
572 | nfsd_vers(nn, vers: num, change: cmd); |
573 | break; |
574 | case 4: |
575 | if (*minorp == '.') { |
576 | if (nfsd_minorversion(nn, minorversion: minor, change: cmd) < 0) |
577 | return -EINVAL; |
578 | } else if ((cmd == NFSD_SET) != nfsd_vers(nn, vers: num, change: NFSD_TEST)) { |
579 | /* |
580 | * Either we have +4 and no minors are enabled, |
581 | * or we have -4 and at least one minor is enabled. |
582 | * In either case, propagate 'cmd' to all minors. |
583 | */ |
584 | minor = 0; |
585 | while (nfsd_minorversion(nn, minorversion: minor, change: cmd) >= 0) |
586 | minor++; |
587 | } |
588 | break; |
589 | default: |
590 | /* Ignore requests to disable non-existent versions */ |
591 | if (cmd == NFSD_SET) |
592 | return -EINVAL; |
593 | } |
594 | vers += len + 1; |
595 | } while ((len = qword_get(bpp: &mesg, dest: vers, bufsize: size)) > 0); |
596 | /* If all get turned off, turn them back on, as |
597 | * having no versions is BAD |
598 | */ |
599 | nfsd_reset_versions(nn); |
600 | } |
601 | |
602 | /* Now write current state into reply buffer */ |
603 | sep = "" ; |
604 | remaining = SIMPLE_TRANSACTION_LIMIT; |
605 | for (num=2 ; num <= 4 ; num++) { |
606 | int minor; |
607 | if (!nfsd_vers(nn, vers: num, change: NFSD_AVAIL)) |
608 | continue; |
609 | |
610 | minor = -1; |
611 | do { |
612 | len = nfsd_print_version_support(nn, buf, remaining, |
613 | sep, vers: num, minor); |
614 | if (len >= remaining) |
615 | goto out; |
616 | remaining -= len; |
617 | buf += len; |
618 | tlen += len; |
619 | minor++; |
620 | if (len) |
621 | sep = " " ; |
622 | } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); |
623 | } |
624 | out: |
625 | len = snprintf(buf, size: remaining, fmt: "\n" ); |
626 | if (len >= remaining) |
627 | return -EINVAL; |
628 | return tlen + len; |
629 | } |
630 | |
631 | /* |
632 | * write_versions - Set or report the available NFS protocol versions |
633 | * |
634 | * Input: |
635 | * buf: ignored |
636 | * size: zero |
637 | * Output: |
638 | * On success: passed-in buffer filled with '\n'-terminated C |
639 | * string containing positive or negative integer |
640 | * values representing the current status of each |
641 | * protocol version; |
642 | * return code is the size in bytes of the string |
643 | * On error: return code is zero or a negative errno value |
644 | * |
645 | * OR |
646 | * |
647 | * Input: |
648 | * buf: C string containing whitespace- |
649 | * separated positive or negative |
650 | * integer values representing NFS |
651 | * protocol versions to enable ("+n") |
652 | * or disable ("-n") |
653 | * size: non-zero length of C string in @buf |
654 | * Output: |
655 | * On success: status of zero or more protocol versions has |
656 | * been updated; passed-in buffer filled with |
657 | * '\n'-terminated C string containing positive |
658 | * or negative integer values representing the |
659 | * current status of each protocol version; |
660 | * return code is the size in bytes of the string |
661 | * On error: return code is zero or a negative errno value |
662 | */ |
663 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
664 | { |
665 | ssize_t rv; |
666 | |
667 | mutex_lock(&nfsd_mutex); |
668 | rv = __write_versions(file, buf, size); |
669 | mutex_unlock(lock: &nfsd_mutex); |
670 | return rv; |
671 | } |
672 | |
673 | /* |
674 | * Zero-length write. Return a list of NFSD's current listener |
675 | * transports. |
676 | */ |
677 | static ssize_t __write_ports_names(char *buf, struct net *net) |
678 | { |
679 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
680 | |
681 | if (nn->nfsd_serv == NULL) |
682 | return 0; |
683 | return svc_xprt_names(serv: nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
684 | } |
685 | |
686 | /* |
687 | * A single 'fd' number was written, in which case it must be for |
688 | * a socket of a supported family/protocol, and we use it as an |
689 | * nfsd listener. |
690 | */ |
691 | static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) |
692 | { |
693 | char *mesg = buf; |
694 | int fd, err; |
695 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
696 | |
697 | err = get_int(bpp: &mesg, anint: &fd); |
698 | if (err != 0 || fd < 0) |
699 | return -EINVAL; |
700 | trace_nfsd_ctl_ports_addfd(net, fd); |
701 | |
702 | err = nfsd_create_serv(net); |
703 | if (err != 0) |
704 | return err; |
705 | |
706 | err = svc_addsock(serv: nn->nfsd_serv, net, fd, name_return: buf, SIMPLE_TRANSACTION_LIMIT, cred); |
707 | |
708 | if (err >= 0 && |
709 | !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) |
710 | svc_get(serv: nn->nfsd_serv); |
711 | |
712 | nfsd_put(net); |
713 | return err; |
714 | } |
715 | |
716 | /* |
717 | * A transport listener is added by writing its transport name and |
718 | * a port number. |
719 | */ |
720 | static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) |
721 | { |
722 | char transport[16]; |
723 | struct svc_xprt *xprt; |
724 | int port, err; |
725 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
726 | |
727 | if (sscanf(buf, "%15s %5u" , transport, &port) != 2) |
728 | return -EINVAL; |
729 | |
730 | if (port < 1 || port > USHRT_MAX) |
731 | return -EINVAL; |
732 | trace_nfsd_ctl_ports_addxprt(net, transport, port); |
733 | |
734 | err = nfsd_create_serv(net); |
735 | if (err != 0) |
736 | return err; |
737 | |
738 | err = svc_xprt_create(serv: nn->nfsd_serv, xprt_name: transport, net, |
739 | PF_INET, port, SVC_SOCK_ANONYMOUS, cred); |
740 | if (err < 0) |
741 | goto out_err; |
742 | |
743 | err = svc_xprt_create(serv: nn->nfsd_serv, xprt_name: transport, net, |
744 | PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); |
745 | if (err < 0 && err != -EAFNOSUPPORT) |
746 | goto out_close; |
747 | |
748 | if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) |
749 | svc_get(serv: nn->nfsd_serv); |
750 | |
751 | nfsd_put(net); |
752 | return 0; |
753 | out_close: |
754 | xprt = svc_find_xprt(serv: nn->nfsd_serv, xcl_name: transport, net, PF_INET, port); |
755 | if (xprt != NULL) { |
756 | svc_xprt_close(xprt); |
757 | svc_xprt_put(xprt); |
758 | } |
759 | out_err: |
760 | nfsd_put(net); |
761 | return err; |
762 | } |
763 | |
764 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, |
765 | struct net *net) |
766 | { |
767 | if (size == 0) |
768 | return __write_ports_names(buf, net); |
769 | |
770 | if (isdigit(c: buf[0])) |
771 | return __write_ports_addfd(buf, net, cred: file->f_cred); |
772 | |
773 | if (isalpha(buf[0])) |
774 | return __write_ports_addxprt(buf, net, cred: file->f_cred); |
775 | |
776 | return -EINVAL; |
777 | } |
778 | |
779 | /* |
780 | * write_ports - Pass a socket file descriptor or transport name to listen on |
781 | * |
782 | * Input: |
783 | * buf: ignored |
784 | * size: zero |
785 | * Output: |
786 | * On success: passed-in buffer filled with a '\n'-terminated C |
787 | * string containing a whitespace-separated list of |
788 | * named NFSD listeners; |
789 | * return code is the size in bytes of the string |
790 | * On error: return code is zero or a negative errno value |
791 | * |
792 | * OR |
793 | * |
794 | * Input: |
795 | * buf: C string containing an unsigned |
796 | * integer value representing a bound |
797 | * but unconnected socket that is to be |
798 | * used as an NFSD listener; listen(3) |
799 | * must be called for a SOCK_STREAM |
800 | * socket, otherwise it is ignored |
801 | * size: non-zero length of C string in @buf |
802 | * Output: |
803 | * On success: NFS service is started; |
804 | * passed-in buffer filled with a '\n'-terminated C |
805 | * string containing a unique alphanumeric name of |
806 | * the listener; |
807 | * return code is the size in bytes of the string |
808 | * On error: return code is a negative errno value |
809 | * |
810 | * OR |
811 | * |
812 | * Input: |
813 | * buf: C string containing a transport |
814 | * name and an unsigned integer value |
815 | * representing the port to listen on, |
816 | * separated by whitespace |
817 | * size: non-zero length of C string in @buf |
818 | * Output: |
819 | * On success: returns zero; NFS service is started |
820 | * On error: return code is a negative errno value |
821 | */ |
822 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
823 | { |
824 | ssize_t rv; |
825 | |
826 | mutex_lock(&nfsd_mutex); |
827 | rv = __write_ports(file, buf, size, net: netns(file)); |
828 | mutex_unlock(lock: &nfsd_mutex); |
829 | return rv; |
830 | } |
831 | |
832 | |
833 | int nfsd_max_blksize; |
834 | |
835 | /* |
836 | * write_maxblksize - Set or report the current NFS blksize |
837 | * |
838 | * Input: |
839 | * buf: ignored |
840 | * size: zero |
841 | * |
842 | * OR |
843 | * |
844 | * Input: |
845 | * buf: C string containing an unsigned |
846 | * integer value representing the new |
847 | * NFS blksize |
848 | * size: non-zero length of C string in @buf |
849 | * Output: |
850 | * On success: passed-in buffer filled with '\n'-terminated C string |
851 | * containing numeric value of the current NFS blksize |
852 | * setting; |
853 | * return code is the size in bytes of the string |
854 | * On error: return code is zero or a negative errno value |
855 | */ |
856 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
857 | { |
858 | char *mesg = buf; |
859 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
860 | |
861 | if (size > 0) { |
862 | int bsize; |
863 | int rv = get_int(bpp: &mesg, anint: &bsize); |
864 | if (rv) |
865 | return rv; |
866 | trace_nfsd_ctl_maxblksize(net: netns(file), bsize); |
867 | |
868 | /* force bsize into allowed range and |
869 | * required alignment. |
870 | */ |
871 | bsize = max_t(int, bsize, 1024); |
872 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); |
873 | bsize &= ~(1024-1); |
874 | mutex_lock(&nfsd_mutex); |
875 | if (nn->nfsd_serv) { |
876 | mutex_unlock(lock: &nfsd_mutex); |
877 | return -EBUSY; |
878 | } |
879 | nfsd_max_blksize = bsize; |
880 | mutex_unlock(lock: &nfsd_mutex); |
881 | } |
882 | |
883 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, fmt: "%d\n" , |
884 | nfsd_max_blksize); |
885 | } |
886 | |
887 | /* |
888 | * write_maxconn - Set or report the current max number of connections |
889 | * |
890 | * Input: |
891 | * buf: ignored |
892 | * size: zero |
893 | * OR |
894 | * |
895 | * Input: |
896 | * buf: C string containing an unsigned |
897 | * integer value representing the new |
898 | * number of max connections |
899 | * size: non-zero length of C string in @buf |
900 | * Output: |
901 | * On success: passed-in buffer filled with '\n'-terminated C string |
902 | * containing numeric value of max_connections setting |
903 | * for this net namespace; |
904 | * return code is the size in bytes of the string |
905 | * On error: return code is zero or a negative errno value |
906 | */ |
907 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) |
908 | { |
909 | char *mesg = buf; |
910 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
911 | unsigned int maxconn = nn->max_connections; |
912 | |
913 | if (size > 0) { |
914 | int rv = get_uint(bpp: &mesg, anint: &maxconn); |
915 | |
916 | if (rv) |
917 | return rv; |
918 | trace_nfsd_ctl_maxconn(net: netns(file), maxconn); |
919 | nn->max_connections = maxconn; |
920 | } |
921 | |
922 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, fmt: "%u\n" , maxconn); |
923 | } |
924 | |
925 | #ifdef CONFIG_NFSD_V4 |
926 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, |
927 | time64_t *time, struct nfsd_net *nn) |
928 | { |
929 | struct dentry *dentry = file_dentry(file); |
930 | char *mesg = buf; |
931 | int rv, i; |
932 | |
933 | if (size > 0) { |
934 | if (nn->nfsd_serv) |
935 | return -EBUSY; |
936 | rv = get_int(bpp: &mesg, anint: &i); |
937 | if (rv) |
938 | return rv; |
939 | trace_nfsd_ctl_time(net: netns(file), name: dentry->d_name.name, |
940 | namelen: dentry->d_name.len, time: i); |
941 | |
942 | /* |
943 | * Some sanity checking. We don't have a reason for |
944 | * these particular numbers, but problems with the |
945 | * extremes are: |
946 | * - Too short: the briefest network outage may |
947 | * cause clients to lose all their locks. Also, |
948 | * the frequent polling may be wasteful. |
949 | * - Too long: do you really want reboot recovery |
950 | * to take more than an hour? Or to make other |
951 | * clients wait an hour before being able to |
952 | * revoke a dead client's locks? |
953 | */ |
954 | if (i < 10 || i > 3600) |
955 | return -EINVAL; |
956 | *time = i; |
957 | } |
958 | |
959 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, fmt: "%lld\n" , *time); |
960 | } |
961 | |
962 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, |
963 | time64_t *time, struct nfsd_net *nn) |
964 | { |
965 | ssize_t rv; |
966 | |
967 | mutex_lock(&nfsd_mutex); |
968 | rv = __nfsd4_write_time(file, buf, size, time, nn); |
969 | mutex_unlock(lock: &nfsd_mutex); |
970 | return rv; |
971 | } |
972 | |
973 | /* |
974 | * write_leasetime - Set or report the current NFSv4 lease time |
975 | * |
976 | * Input: |
977 | * buf: ignored |
978 | * size: zero |
979 | * |
980 | * OR |
981 | * |
982 | * Input: |
983 | * buf: C string containing an unsigned |
984 | * integer value representing the new |
985 | * NFSv4 lease expiry time |
986 | * size: non-zero length of C string in @buf |
987 | * Output: |
988 | * On success: passed-in buffer filled with '\n'-terminated C |
989 | * string containing unsigned integer value of the |
990 | * current lease expiry time; |
991 | * return code is the size in bytes of the string |
992 | * On error: return code is zero or a negative errno value |
993 | */ |
994 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
995 | { |
996 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
997 | return nfsd4_write_time(file, buf, size, time: &nn->nfsd4_lease, nn); |
998 | } |
999 | |
1000 | /* |
1001 | * write_gracetime - Set or report current NFSv4 grace period time |
1002 | * |
1003 | * As above, but sets the time of the NFSv4 grace period. |
1004 | * |
1005 | * Note this should never be set to less than the *previous* |
1006 | * lease-period time, but we don't try to enforce this. (In the common |
1007 | * case (a new boot), we don't know what the previous lease time was |
1008 | * anyway.) |
1009 | */ |
1010 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) |
1011 | { |
1012 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
1013 | return nfsd4_write_time(file, buf, size, time: &nn->nfsd4_grace, nn); |
1014 | } |
1015 | |
1016 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, |
1017 | struct nfsd_net *nn) |
1018 | { |
1019 | char *mesg = buf; |
1020 | char *recdir; |
1021 | int len, status; |
1022 | |
1023 | if (size > 0) { |
1024 | if (nn->nfsd_serv) |
1025 | return -EBUSY; |
1026 | if (size > PATH_MAX || buf[size-1] != '\n') |
1027 | return -EINVAL; |
1028 | buf[size-1] = 0; |
1029 | |
1030 | recdir = mesg; |
1031 | len = qword_get(bpp: &mesg, dest: recdir, bufsize: size); |
1032 | if (len <= 0) |
1033 | return -EINVAL; |
1034 | trace_nfsd_ctl_recoverydir(net: netns(file), recdir); |
1035 | |
1036 | status = nfs4_reset_recoverydir(recdir); |
1037 | if (status) |
1038 | return status; |
1039 | } |
1040 | |
1041 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, fmt: "%s\n" , |
1042 | nfs4_recoverydir()); |
1043 | } |
1044 | |
1045 | /* |
1046 | * write_recoverydir - Set or report the pathname of the recovery directory |
1047 | * |
1048 | * Input: |
1049 | * buf: ignored |
1050 | * size: zero |
1051 | * |
1052 | * OR |
1053 | * |
1054 | * Input: |
1055 | * buf: C string containing the pathname |
1056 | * of the directory on a local file |
1057 | * system containing permanent NFSv4 |
1058 | * recovery data |
1059 | * size: non-zero length of C string in @buf |
1060 | * Output: |
1061 | * On success: passed-in buffer filled with '\n'-terminated C string |
1062 | * containing the current recovery pathname setting; |
1063 | * return code is the size in bytes of the string |
1064 | * On error: return code is zero or a negative errno value |
1065 | */ |
1066 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1067 | { |
1068 | ssize_t rv; |
1069 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
1070 | |
1071 | mutex_lock(&nfsd_mutex); |
1072 | rv = __write_recoverydir(file, buf, size, nn); |
1073 | mutex_unlock(lock: &nfsd_mutex); |
1074 | return rv; |
1075 | } |
1076 | |
1077 | /* |
1078 | * write_v4_end_grace - release grace period for nfsd's v4.x lock manager |
1079 | * |
1080 | * Input: |
1081 | * buf: ignored |
1082 | * size: zero |
1083 | * OR |
1084 | * |
1085 | * Input: |
1086 | * buf: any value |
1087 | * size: non-zero length of C string in @buf |
1088 | * Output: |
1089 | * passed-in buffer filled with "Y" or "N" with a newline |
1090 | * and NULL-terminated C string. This indicates whether |
1091 | * the grace period has ended in the current net |
1092 | * namespace. Return code is the size in bytes of the |
1093 | * string. Writing a string that starts with 'Y', 'y', or |
1094 | * '1' to the file will end the grace period for nfsd's v4 |
1095 | * lock manager. |
1096 | */ |
1097 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) |
1098 | { |
1099 | struct nfsd_net *nn = net_generic(net: netns(file), id: nfsd_net_id); |
1100 | |
1101 | if (size > 0) { |
1102 | switch(buf[0]) { |
1103 | case 'Y': |
1104 | case 'y': |
1105 | case '1': |
1106 | if (!nn->nfsd_serv) |
1107 | return -EBUSY; |
1108 | trace_nfsd_end_grace(net: netns(file)); |
1109 | nfsd4_end_grace(nn); |
1110 | break; |
1111 | default: |
1112 | return -EINVAL; |
1113 | } |
1114 | } |
1115 | |
1116 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, fmt: "%c\n" , |
1117 | nn->grace_ended ? 'Y' : 'N'); |
1118 | } |
1119 | |
1120 | #endif |
1121 | |
1122 | /*----------------------------------------------------------------------------*/ |
1123 | /* |
1124 | * populating the filesystem. |
1125 | */ |
1126 | |
1127 | /* Basically copying rpc_get_inode. */ |
1128 | static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) |
1129 | { |
1130 | struct inode *inode = new_inode(sb); |
1131 | if (!inode) |
1132 | return NULL; |
1133 | /* Following advice from simple_fill_super documentation: */ |
1134 | inode->i_ino = iunique(sb, NFSD_MaxReserved); |
1135 | inode->i_mode = mode; |
1136 | simple_inode_init_ts(inode); |
1137 | switch (mode & S_IFMT) { |
1138 | case S_IFDIR: |
1139 | inode->i_fop = &simple_dir_operations; |
1140 | inode->i_op = &simple_dir_inode_operations; |
1141 | inc_nlink(inode); |
1142 | break; |
1143 | case S_IFLNK: |
1144 | inode->i_op = &simple_symlink_inode_operations; |
1145 | break; |
1146 | default: |
1147 | break; |
1148 | } |
1149 | return inode; |
1150 | } |
1151 | |
1152 | static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) |
1153 | { |
1154 | struct inode *inode; |
1155 | |
1156 | inode = nfsd_get_inode(sb: dir->i_sb, mode); |
1157 | if (!inode) |
1158 | return -ENOMEM; |
1159 | if (ncl) { |
1160 | inode->i_private = ncl; |
1161 | kref_get(kref: &ncl->cl_ref); |
1162 | } |
1163 | d_add(dentry, inode); |
1164 | inc_nlink(inode: dir); |
1165 | fsnotify_mkdir(dir, dentry); |
1166 | return 0; |
1167 | } |
1168 | |
1169 | static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) |
1170 | { |
1171 | struct inode *dir = parent->d_inode; |
1172 | struct dentry *dentry; |
1173 | int ret = -ENOMEM; |
1174 | |
1175 | inode_lock(inode: dir); |
1176 | dentry = d_alloc_name(parent, name); |
1177 | if (!dentry) |
1178 | goto out_err; |
1179 | ret = __nfsd_mkdir(dir: d_inode(dentry: parent), dentry, S_IFDIR | 0600, ncl); |
1180 | if (ret) |
1181 | goto out_err; |
1182 | out: |
1183 | inode_unlock(inode: dir); |
1184 | return dentry; |
1185 | out_err: |
1186 | dput(dentry); |
1187 | dentry = ERR_PTR(error: ret); |
1188 | goto out; |
1189 | } |
1190 | |
1191 | #if IS_ENABLED(CONFIG_SUNRPC_GSS) |
1192 | static int __nfsd_symlink(struct inode *dir, struct dentry *dentry, |
1193 | umode_t mode, const char *content) |
1194 | { |
1195 | struct inode *inode; |
1196 | |
1197 | inode = nfsd_get_inode(sb: dir->i_sb, mode); |
1198 | if (!inode) |
1199 | return -ENOMEM; |
1200 | |
1201 | inode->i_link = (char *)content; |
1202 | inode->i_size = strlen(content); |
1203 | |
1204 | d_add(dentry, inode); |
1205 | inc_nlink(inode: dir); |
1206 | fsnotify_create(dir, dentry); |
1207 | return 0; |
1208 | } |
1209 | |
1210 | /* |
1211 | * @content is assumed to be a NUL-terminated string that lives |
1212 | * longer than the symlink itself. |
1213 | */ |
1214 | static void _nfsd_symlink(struct dentry *parent, const char *name, |
1215 | const char *content) |
1216 | { |
1217 | struct inode *dir = parent->d_inode; |
1218 | struct dentry *dentry; |
1219 | int ret; |
1220 | |
1221 | inode_lock(inode: dir); |
1222 | dentry = d_alloc_name(parent, name); |
1223 | if (!dentry) |
1224 | goto out; |
1225 | ret = __nfsd_symlink(dir: d_inode(dentry: parent), dentry, S_IFLNK | 0777, content); |
1226 | if (ret) |
1227 | dput(dentry); |
1228 | out: |
1229 | inode_unlock(inode: dir); |
1230 | } |
1231 | #else |
1232 | static inline void _nfsd_symlink(struct dentry *parent, const char *name, |
1233 | const char *content) |
1234 | { |
1235 | } |
1236 | |
1237 | #endif |
1238 | |
1239 | static void clear_ncl(struct inode *inode) |
1240 | { |
1241 | struct nfsdfs_client *ncl = inode->i_private; |
1242 | |
1243 | inode->i_private = NULL; |
1244 | kref_put(kref: &ncl->cl_ref, release: ncl->cl_release); |
1245 | } |
1246 | |
1247 | static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) |
1248 | { |
1249 | struct nfsdfs_client *nc = inode->i_private; |
1250 | |
1251 | if (nc) |
1252 | kref_get(kref: &nc->cl_ref); |
1253 | return nc; |
1254 | } |
1255 | |
1256 | struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) |
1257 | { |
1258 | struct nfsdfs_client *nc; |
1259 | |
1260 | inode_lock_shared(inode); |
1261 | nc = __get_nfsdfs_client(inode); |
1262 | inode_unlock_shared(inode); |
1263 | return nc; |
1264 | } |
1265 | /* from __rpc_unlink */ |
1266 | static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) |
1267 | { |
1268 | int ret; |
1269 | |
1270 | clear_ncl(inode: d_inode(dentry)); |
1271 | dget(dentry); |
1272 | ret = simple_unlink(dir, dentry); |
1273 | d_drop(dentry); |
1274 | fsnotify_unlink(dir, dentry); |
1275 | dput(dentry); |
1276 | WARN_ON_ONCE(ret); |
1277 | } |
1278 | |
1279 | static void nfsdfs_remove_files(struct dentry *root) |
1280 | { |
1281 | struct dentry *dentry, *tmp; |
1282 | |
1283 | list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { |
1284 | if (!simple_positive(dentry)) { |
1285 | WARN_ON_ONCE(1); /* I think this can't happen? */ |
1286 | continue; |
1287 | } |
1288 | nfsdfs_remove_file(dir: d_inode(dentry: root), dentry); |
1289 | } |
1290 | } |
1291 | |
1292 | /* XXX: cut'n'paste from simple_fill_super; figure out if we could share |
1293 | * code instead. */ |
1294 | static int nfsdfs_create_files(struct dentry *root, |
1295 | const struct tree_descr *files, |
1296 | struct dentry **fdentries) |
1297 | { |
1298 | struct inode *dir = d_inode(dentry: root); |
1299 | struct inode *inode; |
1300 | struct dentry *dentry; |
1301 | int i; |
1302 | |
1303 | inode_lock(inode: dir); |
1304 | for (i = 0; files->name && files->name[0]; i++, files++) { |
1305 | dentry = d_alloc_name(root, files->name); |
1306 | if (!dentry) |
1307 | goto out; |
1308 | inode = nfsd_get_inode(sb: d_inode(dentry: root)->i_sb, |
1309 | S_IFREG | files->mode); |
1310 | if (!inode) { |
1311 | dput(dentry); |
1312 | goto out; |
1313 | } |
1314 | inode->i_fop = files->ops; |
1315 | inode->i_private = __get_nfsdfs_client(inode: dir); |
1316 | d_add(dentry, inode); |
1317 | fsnotify_create(dir, dentry); |
1318 | if (fdentries) |
1319 | fdentries[i] = dentry; |
1320 | } |
1321 | inode_unlock(inode: dir); |
1322 | return 0; |
1323 | out: |
1324 | nfsdfs_remove_files(root); |
1325 | inode_unlock(inode: dir); |
1326 | return -ENOMEM; |
1327 | } |
1328 | |
1329 | /* on success, returns positive number unique to that client. */ |
1330 | struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, |
1331 | struct nfsdfs_client *ncl, u32 id, |
1332 | const struct tree_descr *files, |
1333 | struct dentry **fdentries) |
1334 | { |
1335 | struct dentry *dentry; |
1336 | char name[11]; |
1337 | int ret; |
1338 | |
1339 | sprintf(buf: name, fmt: "%u" , id); |
1340 | |
1341 | dentry = nfsd_mkdir(parent: nn->nfsd_client_dir, ncl, name); |
1342 | if (IS_ERR(ptr: dentry)) /* XXX: tossing errors? */ |
1343 | return NULL; |
1344 | ret = nfsdfs_create_files(root: dentry, files, fdentries); |
1345 | if (ret) { |
1346 | nfsd_client_rmdir(dentry); |
1347 | return NULL; |
1348 | } |
1349 | return dentry; |
1350 | } |
1351 | |
1352 | /* Taken from __rpc_rmdir: */ |
1353 | void nfsd_client_rmdir(struct dentry *dentry) |
1354 | { |
1355 | struct inode *dir = d_inode(dentry: dentry->d_parent); |
1356 | struct inode *inode = d_inode(dentry); |
1357 | int ret; |
1358 | |
1359 | inode_lock(inode: dir); |
1360 | nfsdfs_remove_files(root: dentry); |
1361 | clear_ncl(inode); |
1362 | dget(dentry); |
1363 | ret = simple_rmdir(dir, dentry); |
1364 | WARN_ON_ONCE(ret); |
1365 | d_drop(dentry); |
1366 | fsnotify_rmdir(dir, dentry); |
1367 | dput(dentry); |
1368 | inode_unlock(inode: dir); |
1369 | } |
1370 | |
1371 | static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) |
1372 | { |
1373 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
1374 | id: nfsd_net_id); |
1375 | struct dentry *dentry; |
1376 | int ret; |
1377 | |
1378 | static const struct tree_descr nfsd_files[] = { |
1379 | [NFSD_List] = {"exports" , &exports_nfsd_operations, S_IRUGO}, |
1380 | /* Per-export io stats use same ops as exports file */ |
1381 | [NFSD_Export_Stats] = {.name: "export_stats" , .ops: &exports_nfsd_operations, S_IRUGO}, |
1382 | [NFSD_Export_features] = {.name: "export_features" , |
1383 | .ops: &export_features_fops, S_IRUGO}, |
1384 | [NFSD_FO_UnlockIP] = {.name: "unlock_ip" , |
1385 | .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1386 | [NFSD_FO_UnlockFS] = {.name: "unlock_filesystem" , |
1387 | .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1388 | [NFSD_Fh] = {.name: "filehandle" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1389 | [NFSD_Threads] = {.name: "threads" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1390 | [NFSD_Pool_Threads] = {.name: "pool_threads" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1391 | [NFSD_Pool_Stats] = {.name: "pool_stats" , .ops: &pool_stats_operations, S_IRUGO}, |
1392 | [NFSD_Reply_Cache_Stats] = {.name: "reply_cache_stats" , |
1393 | .ops: &nfsd_reply_cache_stats_fops, S_IRUGO}, |
1394 | [NFSD_Versions] = {.name: "versions" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1395 | [NFSD_Ports] = {.name: "portlist" , .ops: &transaction_ops, S_IWUSR|S_IRUGO}, |
1396 | [NFSD_MaxBlkSize] = {.name: "max_block_size" , .ops: &transaction_ops, S_IWUSR|S_IRUGO}, |
1397 | [NFSD_MaxConnections] = {.name: "max_connections" , .ops: &transaction_ops, S_IWUSR|S_IRUGO}, |
1398 | [NFSD_Filecache] = {.name: "filecache" , .ops: &nfsd_file_cache_stats_fops, S_IRUGO}, |
1399 | #ifdef CONFIG_NFSD_V4 |
1400 | [NFSD_Leasetime] = {.name: "nfsv4leasetime" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1401 | [NFSD_Gracetime] = {.name: "nfsv4gracetime" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1402 | [NFSD_RecoveryDir] = {.name: "nfsv4recoverydir" , .ops: &transaction_ops, S_IWUSR|S_IRUSR}, |
1403 | [NFSD_V4EndGrace] = {.name: "v4_end_grace" , .ops: &transaction_ops, S_IWUSR|S_IRUGO}, |
1404 | #endif |
1405 | /* last one */ {"" } |
1406 | }; |
1407 | |
1408 | ret = simple_fill_super(sb, 0x6e667364, nfsd_files); |
1409 | if (ret) |
1410 | return ret; |
1411 | _nfsd_symlink(parent: sb->s_root, name: "supported_krb5_enctypes" , |
1412 | content: "/proc/net/rpc/gss_krb5_enctypes" ); |
1413 | dentry = nfsd_mkdir(parent: sb->s_root, NULL, name: "clients" ); |
1414 | if (IS_ERR(ptr: dentry)) |
1415 | return PTR_ERR(ptr: dentry); |
1416 | nn->nfsd_client_dir = dentry; |
1417 | return 0; |
1418 | } |
1419 | |
1420 | static int nfsd_fs_get_tree(struct fs_context *fc) |
1421 | { |
1422 | return get_tree_keyed(fc, fill_super: nfsd_fill_super, key: get_net(net: fc->net_ns)); |
1423 | } |
1424 | |
1425 | static void nfsd_fs_free_fc(struct fs_context *fc) |
1426 | { |
1427 | if (fc->s_fs_info) |
1428 | put_net(net: fc->s_fs_info); |
1429 | } |
1430 | |
1431 | static const struct fs_context_operations nfsd_fs_context_ops = { |
1432 | .free = nfsd_fs_free_fc, |
1433 | .get_tree = nfsd_fs_get_tree, |
1434 | }; |
1435 | |
1436 | static int nfsd_init_fs_context(struct fs_context *fc) |
1437 | { |
1438 | put_user_ns(ns: fc->user_ns); |
1439 | fc->user_ns = get_user_ns(ns: fc->net_ns->user_ns); |
1440 | fc->ops = &nfsd_fs_context_ops; |
1441 | return 0; |
1442 | } |
1443 | |
1444 | static void nfsd_umount(struct super_block *sb) |
1445 | { |
1446 | struct net *net = sb->s_fs_info; |
1447 | |
1448 | nfsd_shutdown_threads(net); |
1449 | |
1450 | kill_litter_super(sb); |
1451 | put_net(net); |
1452 | } |
1453 | |
1454 | static struct file_system_type nfsd_fs_type = { |
1455 | .owner = THIS_MODULE, |
1456 | .name = "nfsd" , |
1457 | .init_fs_context = nfsd_init_fs_context, |
1458 | .kill_sb = nfsd_umount, |
1459 | }; |
1460 | MODULE_ALIAS_FS("nfsd" ); |
1461 | |
1462 | #ifdef CONFIG_PROC_FS |
1463 | |
1464 | static int exports_proc_open(struct inode *inode, struct file *file) |
1465 | { |
1466 | return exports_net_open(current->nsproxy->net_ns, file); |
1467 | } |
1468 | |
1469 | static const struct proc_ops exports_proc_ops = { |
1470 | .proc_open = exports_proc_open, |
1471 | .proc_read = seq_read, |
1472 | .proc_lseek = seq_lseek, |
1473 | .proc_release = seq_release, |
1474 | }; |
1475 | |
1476 | static int create_proc_exports_entry(void) |
1477 | { |
1478 | struct proc_dir_entry *entry; |
1479 | |
1480 | entry = proc_mkdir("fs/nfs" , NULL); |
1481 | if (!entry) |
1482 | return -ENOMEM; |
1483 | entry = proc_create(name: "exports" , mode: 0, parent: entry, proc_ops: &exports_proc_ops); |
1484 | if (!entry) { |
1485 | remove_proc_entry("fs/nfs" , NULL); |
1486 | return -ENOMEM; |
1487 | } |
1488 | return 0; |
1489 | } |
1490 | #else /* CONFIG_PROC_FS */ |
1491 | static int create_proc_exports_entry(void) |
1492 | { |
1493 | return 0; |
1494 | } |
1495 | #endif |
1496 | |
1497 | unsigned int nfsd_net_id; |
1498 | |
1499 | /** |
1500 | * nfsd_nl_rpc_status_get_start - Prepare rpc_status_get dumpit |
1501 | * @cb: netlink metadata and command arguments |
1502 | * |
1503 | * Return values: |
1504 | * %0: The rpc_status_get command may proceed |
1505 | * %-ENODEV: There is no NFSD running in this namespace |
1506 | */ |
1507 | int nfsd_nl_rpc_status_get_start(struct netlink_callback *cb) |
1508 | { |
1509 | struct nfsd_net *nn = net_generic(net: sock_net(sk: cb->skb->sk), id: nfsd_net_id); |
1510 | int ret = -ENODEV; |
1511 | |
1512 | mutex_lock(&nfsd_mutex); |
1513 | if (nn->nfsd_serv) { |
1514 | svc_get(serv: nn->nfsd_serv); |
1515 | ret = 0; |
1516 | } |
1517 | mutex_unlock(lock: &nfsd_mutex); |
1518 | |
1519 | return ret; |
1520 | } |
1521 | |
1522 | static int nfsd_genl_rpc_status_compose_msg(struct sk_buff *skb, |
1523 | struct netlink_callback *cb, |
1524 | struct nfsd_genl_rqstp *rqstp) |
1525 | { |
1526 | void *hdr; |
1527 | u32 i; |
1528 | |
1529 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, seq: cb->nlh->nlmsg_seq, |
1530 | family: &nfsd_nl_family, flags: 0, cmd: NFSD_CMD_RPC_STATUS_GET); |
1531 | if (!hdr) |
1532 | return -ENOBUFS; |
1533 | |
1534 | if (nla_put_be32(skb, attrtype: NFSD_A_RPC_STATUS_XID, value: rqstp->rq_xid) || |
1535 | nla_put_u32(skb, attrtype: NFSD_A_RPC_STATUS_FLAGS, value: rqstp->rq_flags) || |
1536 | nla_put_u32(skb, attrtype: NFSD_A_RPC_STATUS_PROG, value: rqstp->rq_prog) || |
1537 | nla_put_u32(skb, attrtype: NFSD_A_RPC_STATUS_PROC, value: rqstp->rq_proc) || |
1538 | nla_put_u8(skb, attrtype: NFSD_A_RPC_STATUS_VERSION, value: rqstp->rq_vers) || |
1539 | nla_put_s64(skb, attrtype: NFSD_A_RPC_STATUS_SERVICE_TIME, |
1540 | value: ktime_to_us(kt: rqstp->rq_stime), |
1541 | padattr: NFSD_A_RPC_STATUS_PAD)) |
1542 | return -ENOBUFS; |
1543 | |
1544 | switch (rqstp->rq_saddr.sa_family) { |
1545 | case AF_INET: { |
1546 | const struct sockaddr_in *s_in, *d_in; |
1547 | |
1548 | s_in = (const struct sockaddr_in *)&rqstp->rq_saddr; |
1549 | d_in = (const struct sockaddr_in *)&rqstp->rq_daddr; |
1550 | if (nla_put_in_addr(skb, attrtype: NFSD_A_RPC_STATUS_SADDR4, |
1551 | addr: s_in->sin_addr.s_addr) || |
1552 | nla_put_in_addr(skb, attrtype: NFSD_A_RPC_STATUS_DADDR4, |
1553 | addr: d_in->sin_addr.s_addr) || |
1554 | nla_put_be16(skb, attrtype: NFSD_A_RPC_STATUS_SPORT, |
1555 | value: s_in->sin_port) || |
1556 | nla_put_be16(skb, attrtype: NFSD_A_RPC_STATUS_DPORT, |
1557 | value: d_in->sin_port)) |
1558 | return -ENOBUFS; |
1559 | break; |
1560 | } |
1561 | case AF_INET6: { |
1562 | const struct sockaddr_in6 *s_in, *d_in; |
1563 | |
1564 | s_in = (const struct sockaddr_in6 *)&rqstp->rq_saddr; |
1565 | d_in = (const struct sockaddr_in6 *)&rqstp->rq_daddr; |
1566 | if (nla_put_in6_addr(skb, attrtype: NFSD_A_RPC_STATUS_SADDR6, |
1567 | addr: &s_in->sin6_addr) || |
1568 | nla_put_in6_addr(skb, attrtype: NFSD_A_RPC_STATUS_DADDR6, |
1569 | addr: &d_in->sin6_addr) || |
1570 | nla_put_be16(skb, attrtype: NFSD_A_RPC_STATUS_SPORT, |
1571 | value: s_in->sin6_port) || |
1572 | nla_put_be16(skb, attrtype: NFSD_A_RPC_STATUS_DPORT, |
1573 | value: d_in->sin6_port)) |
1574 | return -ENOBUFS; |
1575 | break; |
1576 | } |
1577 | } |
1578 | |
1579 | for (i = 0; i < rqstp->rq_opcnt; i++) |
1580 | if (nla_put_u32(skb, attrtype: NFSD_A_RPC_STATUS_COMPOUND_OPS, |
1581 | value: rqstp->rq_opnum[i])) |
1582 | return -ENOBUFS; |
1583 | |
1584 | genlmsg_end(skb, hdr); |
1585 | return 0; |
1586 | } |
1587 | |
1588 | /** |
1589 | * nfsd_nl_rpc_status_get_dumpit - Handle rpc_status_get dumpit |
1590 | * @skb: reply buffer |
1591 | * @cb: netlink metadata and command arguments |
1592 | * |
1593 | * Returns the size of the reply or a negative errno. |
1594 | */ |
1595 | int nfsd_nl_rpc_status_get_dumpit(struct sk_buff *skb, |
1596 | struct netlink_callback *cb) |
1597 | { |
1598 | struct nfsd_net *nn = net_generic(net: sock_net(sk: skb->sk), id: nfsd_net_id); |
1599 | int i, ret, rqstp_index = 0; |
1600 | |
1601 | rcu_read_lock(); |
1602 | |
1603 | for (i = 0; i < nn->nfsd_serv->sv_nrpools; i++) { |
1604 | struct svc_rqst *rqstp; |
1605 | |
1606 | if (i < cb->args[0]) /* already consumed */ |
1607 | continue; |
1608 | |
1609 | rqstp_index = 0; |
1610 | list_for_each_entry_rcu(rqstp, |
1611 | &nn->nfsd_serv->sv_pools[i].sp_all_threads, |
1612 | rq_all) { |
1613 | struct nfsd_genl_rqstp genl_rqstp; |
1614 | unsigned int status_counter; |
1615 | |
1616 | if (rqstp_index++ < cb->args[1]) /* already consumed */ |
1617 | continue; |
1618 | /* |
1619 | * Acquire rq_status_counter before parsing the rqst |
1620 | * fields. rq_status_counter is set to an odd value in |
1621 | * order to notify the consumers the rqstp fields are |
1622 | * meaningful. |
1623 | */ |
1624 | status_counter = |
1625 | smp_load_acquire(&rqstp->rq_status_counter); |
1626 | if (!(status_counter & 1)) |
1627 | continue; |
1628 | |
1629 | genl_rqstp.rq_xid = rqstp->rq_xid; |
1630 | genl_rqstp.rq_flags = rqstp->rq_flags; |
1631 | genl_rqstp.rq_vers = rqstp->rq_vers; |
1632 | genl_rqstp.rq_prog = rqstp->rq_prog; |
1633 | genl_rqstp.rq_proc = rqstp->rq_proc; |
1634 | genl_rqstp.rq_stime = rqstp->rq_stime; |
1635 | genl_rqstp.rq_opcnt = 0; |
1636 | memcpy(&genl_rqstp.rq_daddr, svc_daddr(rqstp), |
1637 | sizeof(struct sockaddr)); |
1638 | memcpy(&genl_rqstp.rq_saddr, svc_addr(rqstp), |
1639 | sizeof(struct sockaddr)); |
1640 | |
1641 | #ifdef CONFIG_NFSD_V4 |
1642 | if (rqstp->rq_vers == NFS4_VERSION && |
1643 | rqstp->rq_proc == NFSPROC4_COMPOUND) { |
1644 | /* NFSv4 compound */ |
1645 | struct nfsd4_compoundargs *args; |
1646 | int j; |
1647 | |
1648 | args = rqstp->rq_argp; |
1649 | genl_rqstp.rq_opcnt = args->opcnt; |
1650 | for (j = 0; j < genl_rqstp.rq_opcnt; j++) |
1651 | genl_rqstp.rq_opnum[j] = |
1652 | args->ops[j].opnum; |
1653 | } |
1654 | #endif /* CONFIG_NFSD_V4 */ |
1655 | |
1656 | /* |
1657 | * Acquire rq_status_counter before reporting the rqst |
1658 | * fields to the user. |
1659 | */ |
1660 | if (smp_load_acquire(&rqstp->rq_status_counter) != |
1661 | status_counter) |
1662 | continue; |
1663 | |
1664 | ret = nfsd_genl_rpc_status_compose_msg(skb, cb, |
1665 | rqstp: &genl_rqstp); |
1666 | if (ret) |
1667 | goto out; |
1668 | } |
1669 | } |
1670 | |
1671 | cb->args[0] = i; |
1672 | cb->args[1] = rqstp_index; |
1673 | ret = skb->len; |
1674 | out: |
1675 | rcu_read_unlock(); |
1676 | |
1677 | return ret; |
1678 | } |
1679 | |
1680 | /** |
1681 | * nfsd_nl_rpc_status_get_done - rpc_status_get dumpit post-processing |
1682 | * @cb: netlink metadata and command arguments |
1683 | * |
1684 | * Return values: |
1685 | * %0: Success |
1686 | */ |
1687 | int nfsd_nl_rpc_status_get_done(struct netlink_callback *cb) |
1688 | { |
1689 | mutex_lock(&nfsd_mutex); |
1690 | nfsd_put(net: sock_net(sk: cb->skb->sk)); |
1691 | mutex_unlock(lock: &nfsd_mutex); |
1692 | |
1693 | return 0; |
1694 | } |
1695 | |
1696 | /** |
1697 | * nfsd_net_init - Prepare the nfsd_net portion of a new net namespace |
1698 | * @net: a freshly-created network namespace |
1699 | * |
1700 | * This information stays around as long as the network namespace is |
1701 | * alive whether or not there is an NFSD instance running in the |
1702 | * namespace. |
1703 | * |
1704 | * Returns zero on success, or a negative errno otherwise. |
1705 | */ |
1706 | static __net_init int nfsd_net_init(struct net *net) |
1707 | { |
1708 | int retval; |
1709 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
1710 | |
1711 | retval = nfsd_export_init(net); |
1712 | if (retval) |
1713 | goto out_export_error; |
1714 | retval = nfsd_idmap_init(net); |
1715 | if (retval) |
1716 | goto out_idmap_error; |
1717 | retval = nfsd_net_reply_cache_init(nn); |
1718 | if (retval) |
1719 | goto out_repcache_error; |
1720 | nn->nfsd_versions = NULL; |
1721 | nn->nfsd4_minorversions = NULL; |
1722 | nfsd4_init_leases_net(nn); |
1723 | get_random_bytes(buf: &nn->siphash_key, len: sizeof(nn->siphash_key)); |
1724 | seqlock_init(&nn->writeverf_lock); |
1725 | |
1726 | return 0; |
1727 | |
1728 | out_repcache_error: |
1729 | nfsd_idmap_shutdown(net); |
1730 | out_idmap_error: |
1731 | nfsd_export_shutdown(net); |
1732 | out_export_error: |
1733 | return retval; |
1734 | } |
1735 | |
1736 | /** |
1737 | * nfsd_net_exit - Release the nfsd_net portion of a net namespace |
1738 | * @net: a network namespace that is about to be destroyed |
1739 | * |
1740 | */ |
1741 | static __net_exit void nfsd_net_exit(struct net *net) |
1742 | { |
1743 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
1744 | |
1745 | nfsd_net_reply_cache_destroy(nn); |
1746 | nfsd_idmap_shutdown(net); |
1747 | nfsd_export_shutdown(net); |
1748 | nfsd_netns_free_versions(nn); |
1749 | } |
1750 | |
1751 | static struct pernet_operations nfsd_net_ops = { |
1752 | .init = nfsd_net_init, |
1753 | .exit = nfsd_net_exit, |
1754 | .id = &nfsd_net_id, |
1755 | .size = sizeof(struct nfsd_net), |
1756 | }; |
1757 | |
1758 | static int __init init_nfsd(void) |
1759 | { |
1760 | int retval; |
1761 | |
1762 | retval = nfsd4_init_slabs(); |
1763 | if (retval) |
1764 | return retval; |
1765 | retval = nfsd4_init_pnfs(); |
1766 | if (retval) |
1767 | goto out_free_slabs; |
1768 | retval = nfsd_stat_init(); /* Statistics */ |
1769 | if (retval) |
1770 | goto out_free_pnfs; |
1771 | retval = nfsd_drc_slab_create(); |
1772 | if (retval) |
1773 | goto out_free_stat; |
1774 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
1775 | retval = create_proc_exports_entry(); |
1776 | if (retval) |
1777 | goto out_free_lockd; |
1778 | retval = register_pernet_subsys(&nfsd_net_ops); |
1779 | if (retval < 0) |
1780 | goto out_free_exports; |
1781 | retval = register_cld_notifier(); |
1782 | if (retval) |
1783 | goto out_free_subsys; |
1784 | retval = nfsd4_create_laundry_wq(); |
1785 | if (retval) |
1786 | goto out_free_cld; |
1787 | retval = register_filesystem(&nfsd_fs_type); |
1788 | if (retval) |
1789 | goto out_free_all; |
1790 | retval = genl_register_family(family: &nfsd_nl_family); |
1791 | if (retval) |
1792 | goto out_free_all; |
1793 | |
1794 | return 0; |
1795 | out_free_all: |
1796 | nfsd4_destroy_laundry_wq(); |
1797 | out_free_cld: |
1798 | unregister_cld_notifier(); |
1799 | out_free_subsys: |
1800 | unregister_pernet_subsys(&nfsd_net_ops); |
1801 | out_free_exports: |
1802 | remove_proc_entry("fs/nfs/exports" , NULL); |
1803 | remove_proc_entry("fs/nfs" , NULL); |
1804 | out_free_lockd: |
1805 | nfsd_lockd_shutdown(); |
1806 | nfsd_drc_slab_free(); |
1807 | out_free_stat: |
1808 | nfsd_stat_shutdown(); |
1809 | out_free_pnfs: |
1810 | nfsd4_exit_pnfs(); |
1811 | out_free_slabs: |
1812 | nfsd4_free_slabs(); |
1813 | return retval; |
1814 | } |
1815 | |
1816 | static void __exit exit_nfsd(void) |
1817 | { |
1818 | genl_unregister_family(family: &nfsd_nl_family); |
1819 | unregister_filesystem(&nfsd_fs_type); |
1820 | nfsd4_destroy_laundry_wq(); |
1821 | unregister_cld_notifier(); |
1822 | unregister_pernet_subsys(&nfsd_net_ops); |
1823 | nfsd_drc_slab_free(); |
1824 | remove_proc_entry("fs/nfs/exports" , NULL); |
1825 | remove_proc_entry("fs/nfs" , NULL); |
1826 | nfsd_stat_shutdown(); |
1827 | nfsd_lockd_shutdown(); |
1828 | nfsd4_free_slabs(); |
1829 | nfsd4_exit_pnfs(); |
1830 | } |
1831 | |
1832 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>" ); |
1833 | MODULE_DESCRIPTION("In-kernel NFS server" ); |
1834 | MODULE_LICENSE("GPL" ); |
1835 | module_init(init_nfsd) |
1836 | module_exit(exit_nfsd) |
1837 | |