1 | /* |
2 | * Copyright (c) 2000-2020 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ |
29 | /* |
30 | * Copyright (c) 1989, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * This code is derived from software contributed to Berkeley by |
34 | * Rick Macklem at The University of Guelph. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * 3. All advertising materials mentioning features or use of this software |
45 | * must display the following acknowledgement: |
46 | * This product includes software developed by the University of |
47 | * California, Berkeley and its contributors. |
48 | * 4. Neither the name of the University nor the names of its contributors |
49 | * may be used to endorse or promote products derived from this software |
50 | * without specific prior written permission. |
51 | * |
52 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
53 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
54 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
55 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
56 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
57 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
58 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
59 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
60 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
61 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
62 | * SUCH DAMAGE. |
63 | * |
64 | * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 |
65 | * FreeBSD-Id: nfs_syscalls.c,v 1.32 1997/11/07 08:53:25 phk Exp $ |
66 | */ |
67 | |
68 | #include <nfs/nfs_conf.h> |
69 | |
70 | /* |
71 | * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce |
72 | * support for mandatory and extensible security protections. This notice |
73 | * is included in support of clause 2.2 (b) of the Apple Public License, |
74 | * Version 2.0. |
75 | */ |
76 | |
77 | #include <sys/file_internal.h> |
78 | #include <sys/vnode_internal.h> |
79 | #include <sys/uio_internal.h> |
80 | #include <sys/sysctl.h> |
81 | #include <sys/socketvar.h> |
82 | #include <sys/sysproto.h> |
83 | #include <sys/fsevents.h> |
84 | #include <kern/task.h> |
85 | |
86 | #include <security/audit/audit.h> |
87 | |
88 | #include <netinet/in.h> |
89 | #include <netinet/tcp.h> |
90 | #include <nfs/xdr_subs.h> |
91 | #include <nfs/rpcv2.h> |
92 | #include <nfs/nfsproto.h> |
93 | #include <nfs/nfs.h> |
94 | #include <nfs/nfsm_subs.h> |
95 | #include <nfs/nfsrvcache.h> |
96 | #include <nfs/nfs_gss.h> |
97 | #if CONFIG_MACF |
98 | #include <security/mac_framework.h> |
99 | #endif |
100 | |
101 | #if CONFIG_NFS_SERVER |
102 | |
103 | extern const nfsrv_proc_t nfsrv_procs[NFS_NPROCS]; |
104 | |
105 | extern int nfsrv_wg_delay; |
106 | extern int nfsrv_wg_delay_v3; |
107 | |
108 | static int nfsrv_require_resv_port = 0; |
109 | static time_t nfsrv_idlesock_timer_on = 0; |
110 | static int nfsrv_sock_tcp_cnt = 0; |
111 | #define NFSD_MIN_IDLE_TIMEOUT 30 |
112 | static int nfsrv_sock_idle_timeout = 3600; /* One hour */ |
113 | |
114 | int nfssvc_export(user_addr_t argp); |
115 | int nfssvc_exportstats(proc_t p, user_addr_t argp); |
116 | int nfssvc_userstats(proc_t p, user_addr_t argp); |
117 | int nfssvc_usercount(proc_t p, user_addr_t argp); |
118 | int nfssvc_zerostats(void); |
119 | int nfssvc_srvstats(proc_t p, user_addr_t argp); |
120 | int nfssvc_nfsd(void); |
121 | int nfssvc_addsock(socket_t, mbuf_t); |
122 | void nfsrv_zapsock(struct nfsrv_sock *); |
123 | void nfsrv_slpderef(struct nfsrv_sock *); |
124 | void nfsrv_slpfree(struct nfsrv_sock *); |
125 | |
126 | #endif /* CONFIG_NFS_SERVER */ |
127 | |
128 | /* |
129 | * sysctl stuff |
130 | */ |
131 | SYSCTL_DECL(_vfs_generic); |
132 | SYSCTL_EXTENSIBLE_NODE(_vfs_generic, OID_AUTO, nfs, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "nfs hinge" ); |
133 | |
134 | #if CONFIG_NFS_SERVER |
135 | SYSCTL_NODE(_vfs_generic_nfs, OID_AUTO, server, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "nfs server hinge" ); |
136 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, wg_delay, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_wg_delay, 0, "" ); |
137 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, wg_delay_v3, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_wg_delay_v3, 0, "" ); |
138 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, require_resv_port, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_require_resv_port, 0, "" ); |
139 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, async, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_async, 0, "" ); |
140 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, export_hash_size, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_export_hash_size, 0, "" ); |
141 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, reqcache_size, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_reqcache_size, 0, "" ); |
142 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, request_queue_length, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_sock_max_rec_queue_length, 0, "" ); |
143 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, user_stats, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_user_stat_enabled, 0, "" ); |
144 | SYSCTL_UINT(_vfs_generic_nfs_server, OID_AUTO, gss_context_ttl, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_gss_context_ttl, 0, "" ); |
145 | SYSCTL_UINT(_vfs_generic_nfs_server, OID_AUTO, debug_ctl, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_debug_ctl, 0, "" ); |
146 | SYSCTL_UINT(_vfs_generic_nfs_server, OID_AUTO, unprocessed_rpc_current, CTLFLAG_RD | CTLFLAG_LOCKED, &nfsrv_unprocessed_rpc_current, 0, "" ); |
147 | SYSCTL_UINT(_vfs_generic_nfs_server, OID_AUTO, unprocessed_rpc_max, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_unprocessed_rpc_max, 0, "" ); |
148 | #if CONFIG_FSE |
149 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, fsevents, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_fsevents_enabled, 0, "" ); |
150 | #endif |
151 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, nfsd_thread_max, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsd_thread_max, 0, "" ); |
152 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, nfsd_thread_count, CTLFLAG_RD | CTLFLAG_LOCKED, &nfsd_thread_count, 0, "" ); |
153 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, nfsd_sock_idle_timeout, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_sock_idle_timeout, 0, "" ); |
154 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, nfsd_tcp_connections, CTLFLAG_RD | CTLFLAG_LOCKED, &nfsrv_sock_tcp_cnt, 0, "" ); |
155 | #ifdef NFS_UC_Q_DEBUG |
156 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, use_upcall_svc, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_uc_use_proxy, 0, "" ); |
157 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, upcall_queue_limit, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_uc_queue_limit, 0, "" ); |
158 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, upcall_queue_max_seen, CTLFLAG_RW | CTLFLAG_LOCKED, &nfsrv_uc_queue_max_seen, 0, "" ); |
159 | SYSCTL_INT(_vfs_generic_nfs_server, OID_AUTO, upcall_queue_count, CTLFLAG_RD | CTLFLAG_LOCKED, __DECONST(int *, &nfsrv_uc_queue_count), 0, "" ); |
160 | #endif |
161 | #endif /* CONFIG_NFS_SERVER */ |
162 | |
163 | /* NFS hooks */ |
164 | |
165 | /* NFS hooks variables */ |
166 | struct nfs_hooks_in nfsh = { |
167 | .f_vinvalbuf = NULL, |
168 | .f_buf_page_inval = NULL |
169 | }; |
170 | |
171 | /* NFS hooks registration functions */ |
172 | void |
173 | nfs_register_hooks(struct nfs_hooks_in *inh, struct nfs_hooks_out *outh) |
174 | { |
175 | if (inh) { |
176 | nfsh.f_vinvalbuf = inh->f_vinvalbuf; |
177 | nfsh.f_buf_page_inval = inh->f_buf_page_inval; |
178 | } |
179 | |
180 | if (outh) { |
181 | outh->f_get_bsdthreadtask_info = get_bsdthreadtask_info; |
182 | } |
183 | } |
184 | |
185 | void |
186 | nfs_unregister_hooks(void) |
187 | { |
188 | memset(s: &nfsh, c: 0, n: sizeof(nfsh)); |
189 | } |
190 | |
191 | /* NFS hooks wrappers */ |
192 | int |
193 | nfs_vinvalbuf(vnode_t vp, int flags, vfs_context_t ctx, int intrflg) |
194 | { |
195 | if (nfsh.f_vinvalbuf == NULL) { |
196 | return 0; |
197 | } |
198 | |
199 | return nfsh.f_vinvalbuf(vp, flags, ctx, intrflg); |
200 | } |
201 | |
202 | int |
203 | nfs_buf_page_inval(vnode_t vp, off_t offset) |
204 | { |
205 | if (nfsh.f_buf_page_inval == NULL) { |
206 | return 0; |
207 | } |
208 | |
209 | return nfsh.f_buf_page_inval(vp, offset); |
210 | } |
211 | |
212 | #if !CONFIG_NFS_SERVER |
213 | #define __no_nfs_server_unused __unused |
214 | #else |
215 | #define __no_nfs_server_unused /* nothing */ |
216 | #endif |
217 | |
218 | /* |
219 | * NFS server system calls |
220 | * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c |
221 | */ |
222 | |
223 | #if CONFIG_NFS_SERVER |
224 | static struct nfs_exportfs * |
225 | nfsrv_find_exportfs(const char *ptr) |
226 | { |
227 | struct nfs_exportfs *nxfs; |
228 | |
229 | LIST_FOREACH(nxfs, &nfsrv_exports, nxfs_next) { |
230 | if (!strncmp(s1: nxfs->nxfs_path, s2: ptr, MAXPATHLEN)) { |
231 | break; |
232 | } |
233 | } |
234 | if (nxfs && strncmp(s1: nxfs->nxfs_path, s2: ptr, n: strlen(s: nxfs->nxfs_path))) { |
235 | nxfs = NULL; |
236 | } |
237 | |
238 | return nxfs; |
239 | } |
240 | |
241 | static char * |
242 | nfsrv_export_remainder(char *path, char *nxfs_path) |
243 | { |
244 | int error; |
245 | vnode_t vp, rvp; |
246 | struct nameidata nd; |
247 | size_t pathbuflen = MAXPATHLEN; |
248 | char real_mntonname[MAXPATHLEN]; |
249 | |
250 | if (!strncmp(s1: path, s2: nxfs_path, n: strlen(s: nxfs_path))) { |
251 | return path + strlen(s: nxfs_path); |
252 | } |
253 | |
254 | NDINIT(&nd, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1, |
255 | UIO_SYSSPACE, CAST_USER_ADDR_T(nxfs_path), vfs_context_current()); |
256 | error = namei(ndp: &nd); |
257 | if (error) { |
258 | return NULL; |
259 | } |
260 | |
261 | nameidone(&nd); |
262 | vp = nd.ni_vp; |
263 | |
264 | error = VFS_ROOT(vnode_mount(vp), &rvp, vfs_context_current()); |
265 | vnode_put(vp); |
266 | if (error) { |
267 | return NULL; |
268 | } |
269 | |
270 | error = vn_getpath_ext(vp: rvp, NULLVP, pathbuf: real_mntonname, len: &pathbuflen, VN_GETPATH_FSENTER | VN_GETPATH_NO_FIRMLINK); |
271 | vnode_put(vp: rvp); |
272 | |
273 | if (error || strncmp(s1: path, s2: real_mntonname, n: strlen(s: real_mntonname))) { |
274 | return NULL; |
275 | } |
276 | |
277 | return path + strlen(s: real_mntonname); |
278 | } |
279 | /* |
280 | * Get file handle system call |
281 | */ |
282 | int |
283 | getfh( |
284 | proc_t p __no_nfs_server_unused, |
285 | struct getfh_args *uap __no_nfs_server_unused, |
286 | __unused int *retval) |
287 | { |
288 | vnode_t vp; |
289 | struct nfs_filehandle nfh; |
290 | int error, fhlen = 0, fidlen; |
291 | struct nameidata nd; |
292 | char path[MAXPATHLEN], real_mntonname[MAXPATHLEN], *ptr; |
293 | size_t pathlen; |
294 | struct nfs_exportfs *nxfs; |
295 | struct nfs_export *nx; |
296 | |
297 | /* |
298 | * Must be super user |
299 | */ |
300 | error = proc_suser(p); |
301 | if (error) { |
302 | return error; |
303 | } |
304 | |
305 | error = copyinstr(uaddr: uap->fname, kaddr: path, MAXPATHLEN, done: &pathlen); |
306 | if (!error) { |
307 | error = copyin(uap->fhp, &fhlen, sizeof(fhlen)); |
308 | } |
309 | if (error) { |
310 | return error; |
311 | } |
312 | /* limit fh size to length specified (or v3 size by default) */ |
313 | if ((fhlen != NFSV2_MAX_FH_SIZE) && (fhlen != NFSV3_MAX_FH_SIZE)) { |
314 | fhlen = NFSV3_MAX_FH_SIZE; |
315 | } |
316 | fidlen = fhlen - sizeof(struct nfs_exphandle); |
317 | |
318 | if (!nfsrv_is_initialized()) { |
319 | return EINVAL; |
320 | } |
321 | |
322 | NDINIT(&nd, LOOKUP, OP_LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1, |
323 | UIO_SYSSPACE, CAST_USER_ADDR_T(path), vfs_context_current()); |
324 | error = namei(ndp: &nd); |
325 | if (error) { |
326 | return error; |
327 | } |
328 | nameidone(&nd); |
329 | |
330 | vp = nd.ni_vp; |
331 | |
332 | // find exportfs that matches f_mntonname |
333 | lck_rw_lock_shared(lck: &nfsrv_export_rwlock); |
334 | ptr = vfs_statfs(mp: vnode_mount(vp))->f_mntonname; |
335 | if ((nxfs = nfsrv_find_exportfs(ptr)) == NULL) { |
336 | /* |
337 | * The f_mntonname might be a firmlink path. Resolve |
338 | * it into a physical path and try again. |
339 | */ |
340 | size_t pathbuflen = MAXPATHLEN; |
341 | vnode_t rvp; |
342 | |
343 | error = VFS_ROOT(vnode_mount(vp), &rvp, vfs_context_current()); |
344 | if (error) { |
345 | goto out; |
346 | } |
347 | error = vn_getpath_ext(vp: rvp, NULLVP, pathbuf: real_mntonname, len: &pathbuflen, |
348 | VN_GETPATH_FSENTER | VN_GETPATH_NO_FIRMLINK); |
349 | vnode_put(vp: rvp); |
350 | if (error) { |
351 | goto out; |
352 | } |
353 | ptr = real_mntonname; |
354 | nxfs = nfsrv_find_exportfs(ptr); |
355 | } |
356 | if (nxfs == NULL) { |
357 | error = EINVAL; |
358 | goto out; |
359 | } |
360 | // find export that best matches remainder of path |
361 | if ((ptr = nfsrv_export_remainder(path, nxfs_path: nxfs->nxfs_path)) == NULL) { |
362 | error = EINVAL; |
363 | goto out; |
364 | } |
365 | |
366 | while (*ptr && (*ptr == '/')) { |
367 | ptr++; |
368 | } |
369 | LIST_FOREACH(nx, &nxfs->nxfs_exports, nx_next) { |
370 | size_t len = strlen(s: nx->nx_path); |
371 | if (len == 0) { // we've hit the export entry for the root directory |
372 | break; |
373 | } |
374 | if (!strncmp(s1: nx->nx_path, s2: ptr, n: len)) { |
375 | break; |
376 | } |
377 | } |
378 | if (!nx) { |
379 | error = EINVAL; |
380 | goto out; |
381 | } |
382 | |
383 | bzero(s: &nfh, n: sizeof(nfh)); |
384 | nfh.nfh_xh.nxh_version = htonl(NFS_FH_VERSION); |
385 | nfh.nfh_xh.nxh_fsid = htonl(nxfs->nxfs_id); |
386 | nfh.nfh_xh.nxh_expid = htonl(nx->nx_id); |
387 | nfh.nfh_xh.nxh_flags = 0; |
388 | nfh.nfh_xh.nxh_reserved = 0; |
389 | nfh.nfh_len = fidlen; |
390 | error = VFS_VPTOFH(vp, (int*)&nfh.nfh_len, &nfh.nfh_fid[0], NULL); |
391 | if (nfh.nfh_len > (uint32_t)fidlen) { |
392 | error = EOVERFLOW; |
393 | } |
394 | nfh.nfh_xh.nxh_fidlen = nfh.nfh_len; |
395 | nfh.nfh_len += sizeof(nfh.nfh_xh); |
396 | nfh.nfh_fhp = (u_char*)&nfh.nfh_xh; |
397 | |
398 | out: |
399 | lck_rw_done(lck: &nfsrv_export_rwlock); |
400 | vnode_put(vp); |
401 | if (error) { |
402 | return error; |
403 | } |
404 | /* |
405 | * At first blush, this may appear to leak a kernel stack |
406 | * address, but the copyout() never reaches &nfh.nfh_fhp |
407 | * (sizeof(fhandle_t) < sizeof(nfh)). |
408 | */ |
409 | error = copyout((caddr_t)&nfh, uap->fhp, sizeof(fhandle_t)); |
410 | return error; |
411 | } |
412 | |
413 | extern const struct fileops vnops; |
414 | |
415 | /* |
416 | * syscall for the rpc.lockd to use to translate a NFS file handle into |
417 | * an open descriptor. |
418 | * |
419 | * warning: do not remove the suser() call or this becomes one giant |
420 | * security hole. |
421 | */ |
422 | int |
423 | fhopen(proc_t p __no_nfs_server_unused, |
424 | struct fhopen_args *uap __no_nfs_server_unused, |
425 | int32_t *retval __no_nfs_server_unused) |
426 | { |
427 | vnode_t vp; |
428 | struct nfs_filehandle nfh; |
429 | struct nfs_export *nx; |
430 | struct nfs_export_options *nxo; |
431 | struct flock lf; |
432 | struct fileproc *fp, *nfp; |
433 | int fmode, error, type; |
434 | int indx; |
435 | vfs_context_t ctx = vfs_context_current(); |
436 | kauth_action_t action; |
437 | |
438 | /* |
439 | * Must be super user |
440 | */ |
441 | error = suser(cred: vfs_context_ucred(ctx), acflag: 0); |
442 | if (error) { |
443 | return error; |
444 | } |
445 | |
446 | if (!nfsrv_is_initialized()) { |
447 | return EINVAL; |
448 | } |
449 | |
450 | fmode = FFLAGS(uap->flags); |
451 | /* why not allow a non-read/write open for our lockd? */ |
452 | if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT)) { |
453 | return EINVAL; |
454 | } |
455 | |
456 | error = copyin(uap->u_fhp, &nfh.nfh_len, sizeof(nfh.nfh_len)); |
457 | if (error) { |
458 | return error; |
459 | } |
460 | if ((nfh.nfh_len < (int)sizeof(struct nfs_exphandle)) || |
461 | (nfh.nfh_len > (int)NFSV3_MAX_FH_SIZE)) { |
462 | return EINVAL; |
463 | } |
464 | error = copyin(uap->u_fhp, &nfh, sizeof(nfh.nfh_len) + nfh.nfh_len); |
465 | if (error) { |
466 | return error; |
467 | } |
468 | nfh.nfh_fhp = (u_char*)&nfh.nfh_xh; |
469 | |
470 | lck_rw_lock_shared(lck: &nfsrv_export_rwlock); |
471 | /* now give me my vnode, it gets returned to me with a reference */ |
472 | error = nfsrv_fhtovp(&nfh, NULL, &vp, &nx, &nxo); |
473 | lck_rw_done(lck: &nfsrv_export_rwlock); |
474 | if (error) { |
475 | if (error == NFSERR_TRYLATER) { |
476 | error = EAGAIN; // XXX EBUSY? Or just leave as TRYLATER? |
477 | } |
478 | return error; |
479 | } |
480 | |
481 | /* |
482 | * From now on we have to make sure not |
483 | * to forget about the vnode. |
484 | * Any error that causes an abort must vnode_put(vp). |
485 | * Just set error = err and 'goto bad;'. |
486 | */ |
487 | |
488 | /* |
489 | * from vn_open |
490 | */ |
491 | if (vnode_vtype(vp) == VSOCK) { |
492 | error = EOPNOTSUPP; |
493 | goto bad; |
494 | } |
495 | |
496 | /* disallow write operations on directories */ |
497 | if (vnode_isdir(vp) && (fmode & (FWRITE | O_TRUNC))) { |
498 | error = EISDIR; |
499 | goto bad; |
500 | } |
501 | |
502 | #if CONFIG_MACF |
503 | if ((error = mac_vnode_check_open(ctx, vp, acc_mode: fmode))) { |
504 | goto bad; |
505 | } |
506 | #endif |
507 | |
508 | /* compute action to be authorized */ |
509 | action = 0; |
510 | if (fmode & FREAD) { |
511 | action |= KAUTH_VNODE_READ_DATA; |
512 | } |
513 | if (fmode & (FWRITE | O_TRUNC)) { |
514 | action |= KAUTH_VNODE_WRITE_DATA; |
515 | } |
516 | if ((error = vnode_authorize(vp, NULL, action, ctx)) != 0) { |
517 | goto bad; |
518 | } |
519 | |
520 | if ((error = VNOP_OPEN(vp, fmode, ctx))) { |
521 | goto bad; |
522 | } |
523 | if ((error = vnode_ref_ext(vp, fmode, 0))) { |
524 | goto bad; |
525 | } |
526 | |
527 | /* |
528 | * end of vn_open code |
529 | */ |
530 | |
531 | // starting here... error paths should call vn_close/vnode_put |
532 | if ((error = falloc(p, &nfp, &indx)) != 0) { |
533 | vn_close(vp, flags: fmode & FMASK, ctx); |
534 | goto bad; |
535 | } |
536 | fp = nfp; |
537 | |
538 | fp->fp_glob->fg_flag = fmode & FMASK; |
539 | fp->fp_glob->fg_ops = &vnops; |
540 | fp_set_data(fp, fg_data: vp); |
541 | |
542 | // XXX do we really need to support this with fhopen()? |
543 | if (fmode & (O_EXLOCK | O_SHLOCK)) { |
544 | lf.l_whence = SEEK_SET; |
545 | lf.l_start = 0; |
546 | lf.l_len = 0; |
547 | if (fmode & O_EXLOCK) { |
548 | lf.l_type = F_WRLCK; |
549 | } else { |
550 | lf.l_type = F_RDLCK; |
551 | } |
552 | type = F_FLOCK; |
553 | if ((fmode & FNONBLOCK) == 0) { |
554 | type |= F_WAIT; |
555 | } |
556 | if ((error = VNOP_ADVLOCK(vp, (caddr_t)fp->fp_glob, F_SETLK, &lf, type, ctx, NULL))) { |
557 | struct vfs_context context = *vfs_context_current(); |
558 | /* Modify local copy (to not damage thread copy) */ |
559 | context.vc_ucred = fp->fp_glob->fg_cred; |
560 | |
561 | vn_close(vp, flags: fp->fp_glob->fg_flag, ctx: &context); |
562 | fp_free(p, fd: indx, fp); |
563 | goto bad; |
564 | } |
565 | fp->fp_glob->fg_flag |= FWASLOCKED; |
566 | } |
567 | |
568 | vnode_put(vp); |
569 | |
570 | proc_fdlock(p); |
571 | procfdtbl_releasefd(p, fd: indx, NULL); |
572 | fp_drop(p, fd: indx, fp, locked: 1); |
573 | proc_fdunlock(p); |
574 | |
575 | *retval = indx; |
576 | return 0; |
577 | |
578 | bad: |
579 | vnode_put(vp); |
580 | return error; |
581 | } |
582 | |
583 | /* |
584 | * NFS server pseudo system call |
585 | */ |
586 | int |
587 | nfssvc(proc_t p __no_nfs_server_unused, |
588 | struct nfssvc_args *uap __no_nfs_server_unused, |
589 | __unused int *retval) |
590 | { |
591 | mbuf_t nam; |
592 | struct user_nfsd_args user_nfsdarg; |
593 | socket_t so; |
594 | int error; |
595 | |
596 | AUDIT_ARG(cmd, uap->flag); |
597 | |
598 | /* |
599 | * Must be super user for NFSSVC_NFSD and NFSSVC_ADDSOCK operations. |
600 | */ |
601 | if ((uap->flag & (NFSSVC_NFSD | NFSSVC_ADDSOCK)) && ((error = proc_suser(p)))) { |
602 | return error; |
603 | } |
604 | #if CONFIG_MACF |
605 | error = mac_system_check_nfsd(cred: kauth_cred_get()); |
606 | if (error) { |
607 | return error; |
608 | } |
609 | #endif |
610 | |
611 | /* make sure NFS server data structures have been initialized */ |
612 | nfsrv_init(); |
613 | |
614 | if (uap->flag & NFSSVC_ADDSOCK) { |
615 | if (IS_64BIT_PROCESS(p)) { |
616 | error = copyin(uap->argp, (caddr_t)&user_nfsdarg, sizeof(user_nfsdarg)); |
617 | } else { |
618 | struct nfsd_args tmp_args; |
619 | error = copyin(uap->argp, (caddr_t)&tmp_args, sizeof(tmp_args)); |
620 | if (error == 0) { |
621 | user_nfsdarg.sock = tmp_args.sock; |
622 | user_nfsdarg.name = CAST_USER_ADDR_T(tmp_args.name); |
623 | user_nfsdarg.namelen = tmp_args.namelen; |
624 | } |
625 | } |
626 | if (error) { |
627 | return error; |
628 | } |
629 | /* get the socket */ |
630 | error = file_socket(user_nfsdarg.sock, &so); |
631 | if (error) { |
632 | return error; |
633 | } |
634 | /* Get the client address for connected sockets. */ |
635 | if (user_nfsdarg.name == USER_ADDR_NULL || user_nfsdarg.namelen == 0) { |
636 | nam = NULL; |
637 | } else { |
638 | error = sockargs(mp: &nam, data: user_nfsdarg.name, buflen: user_nfsdarg.namelen, type: MBUF_TYPE_SONAME); |
639 | if (error) { |
640 | /* drop the iocount file_socket() grabbed on the file descriptor */ |
641 | file_drop(user_nfsdarg.sock); |
642 | return error; |
643 | } |
644 | } |
645 | /* |
646 | * nfssvc_addsock() will grab a retain count on the socket |
647 | * to keep the socket from being closed when nfsd closes its |
648 | * file descriptor for it. |
649 | */ |
650 | error = nfssvc_addsock(so, nam); |
651 | /* drop the iocount file_socket() grabbed on the file descriptor */ |
652 | file_drop(user_nfsdarg.sock); |
653 | } else if (uap->flag & NFSSVC_NFSD) { |
654 | error = nfssvc_nfsd(); |
655 | } else if (uap->flag & NFSSVC_EXPORT) { |
656 | error = nfssvc_export(argp: uap->argp); |
657 | } else if (uap->flag & NFSSVC_EXPORTSTATS) { |
658 | error = nfssvc_exportstats(p, argp: uap->argp); |
659 | } else if (uap->flag & NFSSVC_USERSTATS) { |
660 | error = nfssvc_userstats(p, argp: uap->argp); |
661 | } else if (uap->flag & NFSSVC_USERCOUNT) { |
662 | error = nfssvc_usercount(p, argp: uap->argp); |
663 | } else if (uap->flag & NFSSVC_ZEROSTATS) { |
664 | error = nfssvc_zerostats(); |
665 | } else if (uap->flag & NFSSVC_SRVSTATS) { |
666 | error = nfssvc_srvstats(p, argp: uap->argp); |
667 | } else { |
668 | error = EINVAL; |
669 | } |
670 | if (error == EINTR || error == ERESTART) { |
671 | error = 0; |
672 | } |
673 | return error; |
674 | } |
675 | |
676 | /* |
677 | * Adds a socket to the list for servicing by nfsds. |
678 | */ |
679 | int |
680 | nfssvc_addsock(socket_t so, mbuf_t mynam) |
681 | { |
682 | struct nfsrv_sock *slp; |
683 | int error = 0, sodomain, sotype, soprotocol, on = 1; |
684 | int first; |
685 | struct timeval timeo; |
686 | uint64_t sobufsize; |
687 | |
688 | /* make sure mbuf constants are set up */ |
689 | if (!nfs_mbuf_mhlen) { |
690 | nfs_mbuf_init(); |
691 | } |
692 | |
693 | sock_gettype(so, domain: &sodomain, type: &sotype, protocol: &soprotocol); |
694 | |
695 | /* There should be only one UDP socket for each of IPv4 and IPv6 */ |
696 | if ((sodomain == AF_INET) && (soprotocol == IPPROTO_UDP) && nfsrv_udpsock) { |
697 | mbuf_freem(mbuf: mynam); |
698 | return EEXIST; |
699 | } |
700 | if ((sodomain == AF_INET6) && (soprotocol == IPPROTO_UDP) && nfsrv_udp6sock) { |
701 | mbuf_freem(mbuf: mynam); |
702 | return EEXIST; |
703 | } |
704 | |
705 | /* Set protocol options and reserve some space (for UDP). */ |
706 | if (sotype == SOCK_STREAM) { |
707 | error = nfsrv_check_exports_allow_address(mynam); |
708 | if (error) { |
709 | log(LOG_INFO, "nfsvc_addsock:: nfsrv_check_exports_allow_address(myname) returned %d\n" , error); |
710 | mbuf_freem(mbuf: mynam); |
711 | return error; |
712 | } |
713 | sock_setsockopt(so, SOL_SOCKET, SO_KEEPALIVE, optval: &on, optlen: sizeof(on)); |
714 | } |
715 | if ((sodomain == AF_INET) && (soprotocol == IPPROTO_TCP)) { |
716 | sock_setsockopt(so, IPPROTO_TCP, TCP_NODELAY, optval: &on, optlen: sizeof(on)); |
717 | } |
718 | |
719 | /* Set socket buffer sizes for UDP/TCP */ |
720 | sobufsize = (sotype == SOCK_DGRAM) ? NFS_UDPSOCKBUF : NFSRV_TCPSOCKBUF; |
721 | error = sock_setsockopt(so, SOL_SOCKET, SO_SNDBUF, optval: &sobufsize, optlen: sizeof(sobufsize)); |
722 | if (error) { |
723 | log(LOG_INFO, "nfssvc_addsock: socket buffer setting SO_SNDBUF to %llu error(s) %d\n" , sobufsize, error); |
724 | } |
725 | |
726 | error = sock_setsockopt(so, SOL_SOCKET, SO_RCVBUF, optval: &sobufsize, optlen: sizeof(sobufsize)); |
727 | if (error) { |
728 | log(LOG_INFO, "nfssvc_addsock: socket buffer setting SO_RCVBUF to %llu error(s) %d\n" , sobufsize, error); |
729 | } |
730 | sock_nointerrupt(so, on: 0); |
731 | |
732 | /* |
733 | * Set socket send/receive timeouts. |
734 | * Receive timeout shouldn't matter, but setting the send timeout |
735 | * will make sure that an unresponsive client can't hang the server. |
736 | */ |
737 | timeo.tv_usec = 0; |
738 | timeo.tv_sec = 1; |
739 | error = sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, optval: &timeo, optlen: sizeof(timeo)); |
740 | if (error) { |
741 | log(LOG_INFO, "nfssvc_addsock: socket timeout setting SO_RCVTIMEO error(s) %d\n" , error); |
742 | } |
743 | |
744 | timeo.tv_sec = 30; |
745 | error = sock_setsockopt(so, SOL_SOCKET, SO_SNDTIMEO, optval: &timeo, optlen: sizeof(timeo)); |
746 | if (error) { |
747 | log(LOG_INFO, "nfssvc_addsock: socket timeout setting SO_SNDTIMEO error(s) %d\n" , error); |
748 | } |
749 | |
750 | slp = kalloc_type(struct nfsrv_sock, Z_WAITOK | Z_ZERO | Z_NOFAIL); |
751 | lck_rw_init(lck: &slp->ns_rwlock, grp: &nfsrv_slp_rwlock_group, LCK_ATTR_NULL); |
752 | lck_mtx_init(lck: &slp->ns_wgmutex, grp: &nfsrv_slp_mutex_group, LCK_ATTR_NULL); |
753 | |
754 | lck_mtx_lock(lck: &nfsd_mutex); |
755 | |
756 | if (soprotocol == IPPROTO_UDP) { |
757 | if (sodomain == AF_INET) { |
758 | /* There should be only one UDP/IPv4 socket */ |
759 | if (nfsrv_udpsock) { |
760 | lck_mtx_unlock(lck: &nfsd_mutex); |
761 | nfsrv_slpfree(slp); |
762 | mbuf_freem(mbuf: mynam); |
763 | return EEXIST; |
764 | } |
765 | nfsrv_udpsock = slp; |
766 | } |
767 | if (sodomain == AF_INET6) { |
768 | /* There should be only one UDP/IPv6 socket */ |
769 | if (nfsrv_udp6sock) { |
770 | lck_mtx_unlock(lck: &nfsd_mutex); |
771 | nfsrv_slpfree(slp); |
772 | mbuf_freem(mbuf: mynam); |
773 | return EEXIST; |
774 | } |
775 | nfsrv_udp6sock = slp; |
776 | } |
777 | } |
778 | |
779 | /* add the socket to the list */ |
780 | first = TAILQ_EMPTY(&nfsrv_socklist); |
781 | TAILQ_INSERT_TAIL(&nfsrv_socklist, slp, ns_chain); |
782 | if (sotype == SOCK_STREAM) { |
783 | nfsrv_sock_tcp_cnt++; |
784 | if (nfsrv_sock_idle_timeout < 0) { |
785 | nfsrv_sock_idle_timeout = 0; |
786 | } |
787 | if (nfsrv_sock_idle_timeout && (nfsrv_sock_idle_timeout < NFSD_MIN_IDLE_TIMEOUT)) { |
788 | nfsrv_sock_idle_timeout = NFSD_MIN_IDLE_TIMEOUT; |
789 | } |
790 | /* |
791 | * Possibly start or stop the idle timer. We only start the idle timer when |
792 | * we have more than 2 * nfsd_thread_max connections. If the idle timer is |
793 | * on then we may need to turn it off based on the nvsrv_sock_idle_timeout or |
794 | * the number of connections. |
795 | */ |
796 | if ((nfsrv_sock_tcp_cnt > 2 * nfsd_thread_max) || nfsrv_idlesock_timer_on) { |
797 | if (nfsrv_sock_idle_timeout == 0 || nfsrv_sock_tcp_cnt <= 2 * nfsd_thread_max) { |
798 | if (nfsrv_idlesock_timer_on) { |
799 | thread_call_cancel(call: nfsrv_idlesock_timer_call); |
800 | nfsrv_idlesock_timer_on = 0; |
801 | } |
802 | } else { |
803 | struct nfsrv_sock *old_slp; |
804 | struct timeval now; |
805 | microuptime(tv: &now); |
806 | time_t time_to_wait = nfsrv_sock_idle_timeout; |
807 | /* |
808 | * Get the oldest tcp socket and calculate the |
809 | * earliest time for the next idle timer to fire |
810 | * based on the possibly updated nfsrv_sock_idle_timeout |
811 | */ |
812 | TAILQ_FOREACH(old_slp, &nfsrv_socklist, ns_chain) { |
813 | if (old_slp->ns_sotype == SOCK_STREAM) { |
814 | time_to_wait -= now.tv_sec - old_slp->ns_timestamp; |
815 | if (time_to_wait < 1) { |
816 | time_to_wait = 1; |
817 | } |
818 | break; |
819 | } |
820 | } |
821 | /* |
822 | * If we have a timer scheduled, but if its going to fire too late, |
823 | * turn it off. |
824 | */ |
825 | if (nfsrv_idlesock_timer_on > now.tv_sec + time_to_wait) { |
826 | thread_call_cancel(call: nfsrv_idlesock_timer_call); |
827 | nfsrv_idlesock_timer_on = 0; |
828 | } |
829 | /* Schedule the idle thread if it isn't already */ |
830 | if (!nfsrv_idlesock_timer_on) { |
831 | nfs_interval_timer_start(nfsrv_idlesock_timer_call, time_to_wait * 1000); |
832 | nfsrv_idlesock_timer_on = now.tv_sec + time_to_wait; |
833 | } |
834 | } |
835 | } |
836 | } |
837 | |
838 | sock_retain(so); /* grab a retain count on the socket */ |
839 | slp->ns_so = so; |
840 | slp->ns_sotype = sotype; |
841 | slp->ns_nam = mynam; |
842 | |
843 | /* set up the socket up-call */ |
844 | nfsrv_uc_addsock(slp, first); |
845 | |
846 | /* mark that the socket is not in the nfsrv_sockwg list */ |
847 | slp->ns_wgq.tqe_next = SLPNOLIST; |
848 | |
849 | slp->ns_flag = SLP_VALID | SLP_NEEDQ; |
850 | |
851 | nfsrv_wakenfsd(slp); |
852 | lck_mtx_unlock(lck: &nfsd_mutex); |
853 | |
854 | return 0; |
855 | } |
856 | |
857 | /* |
858 | * nfssvc_nfsd() |
859 | * |
860 | * nfsd theory of operation: |
861 | * |
862 | * The first nfsd thread stays in user mode accepting new TCP connections |
863 | * which are then added via the "addsock" call. The rest of the nfsd threads |
864 | * simply call into the kernel and remain there in a loop handling NFS |
865 | * requests until killed by a signal. |
866 | * |
867 | * There's a list of nfsd threads (nfsd_head). |
868 | * There's an nfsd queue that contains only those nfsds that are |
869 | * waiting for work to do (nfsd_queue). |
870 | * |
871 | * There's a list of all NFS sockets (nfsrv_socklist) and two queues for |
872 | * managing the work on the sockets: |
873 | * nfsrv_sockwait - sockets w/new data waiting to be worked on |
874 | * nfsrv_sockwork - sockets being worked on which may have more work to do |
875 | * nfsrv_sockwg -- sockets which have pending write gather data |
876 | * When a socket receives data, if it is not currently queued, it |
877 | * will be placed at the end of the "wait" queue. |
878 | * Whenever a socket needs servicing we make sure it is queued and |
879 | * wake up a waiting nfsd (if there is one). |
880 | * |
881 | * nfsds will service at most 8 requests from the same socket before |
882 | * defecting to work on another socket. |
883 | * nfsds will defect immediately if there are any sockets in the "wait" queue |
884 | * nfsds looking for a socket to work on check the "wait" queue first and |
885 | * then check the "work" queue. |
886 | * When an nfsd starts working on a socket, it removes it from the head of |
887 | * the queue it's currently on and moves it to the end of the "work" queue. |
888 | * When nfsds are checking the queues for work, any sockets found not to |
889 | * have any work are simply dropped from the queue. |
890 | * |
891 | */ |
892 | int |
893 | nfssvc_nfsd(void) |
894 | { |
895 | mbuf_t m, mrep = NULL; |
896 | struct nfsrv_sock *slp; |
897 | struct nfsd *nfsd; |
898 | struct nfsrv_descript *nd = NULL; |
899 | int error = 0, cacherep, writes_todo; |
900 | int siz, procrastinate, opcnt = 0; |
901 | time_t cur_usec; |
902 | struct timeval now; |
903 | struct vfs_context context; |
904 | struct timespec to; |
905 | |
906 | #ifndef nolint |
907 | cacherep = RC_DOIT; |
908 | writes_todo = 0; |
909 | #endif |
910 | |
911 | nfsd = kalloc_type(struct nfsd, Z_WAITOK | Z_ZERO | Z_NOFAIL); |
912 | lck_mtx_lock(lck: &nfsd_mutex); |
913 | if (nfsd_thread_count++ == 0) { |
914 | nfsrv_initcache(); /* Init the server request cache */ |
915 | } |
916 | TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); |
917 | lck_mtx_unlock(lck: &nfsd_mutex); |
918 | |
919 | context.vc_thread = current_thread(); |
920 | |
921 | /* Set time out so that nfsd threads can wake up a see if they are still needed. */ |
922 | to.tv_sec = 5; |
923 | to.tv_nsec = 0; |
924 | |
925 | /* |
926 | * Loop getting rpc requests until SIGKILL. |
927 | */ |
928 | for (;;) { |
929 | if (nfsd_thread_max <= 0) { |
930 | /* NFS server shutting down, get out ASAP */ |
931 | error = EINTR; |
932 | slp = nfsd->nfsd_slp; |
933 | } else if (nfsd->nfsd_flag & NFSD_REQINPROG) { |
934 | /* already have some work to do */ |
935 | error = 0; |
936 | slp = nfsd->nfsd_slp; |
937 | } else { |
938 | /* need to find work to do */ |
939 | error = 0; |
940 | lck_mtx_lock(lck: &nfsd_mutex); |
941 | while (!nfsd->nfsd_slp && TAILQ_EMPTY(&nfsrv_sockwait) && TAILQ_EMPTY(&nfsrv_sockwork)) { |
942 | if (nfsd_thread_count > nfsd_thread_max) { |
943 | /* |
944 | * If we have no socket and there are more |
945 | * nfsd threads than configured, let's exit. |
946 | */ |
947 | error = 0; |
948 | goto done; |
949 | } |
950 | nfsd->nfsd_flag |= NFSD_WAITING; |
951 | TAILQ_INSERT_HEAD(&nfsd_queue, nfsd, nfsd_queue); |
952 | error = msleep(chan: nfsd, mtx: &nfsd_mutex, PSOCK | PCATCH, wmesg: "nfsd" , ts: &to); |
953 | if (error) { |
954 | if (nfsd->nfsd_flag & NFSD_WAITING) { |
955 | TAILQ_REMOVE(&nfsd_queue, nfsd, nfsd_queue); |
956 | nfsd->nfsd_flag &= ~NFSD_WAITING; |
957 | } |
958 | if (error == EWOULDBLOCK) { |
959 | continue; |
960 | } |
961 | goto done; |
962 | } |
963 | } |
964 | slp = nfsd->nfsd_slp; |
965 | if (!slp && !TAILQ_EMPTY(&nfsrv_sockwait)) { |
966 | /* look for a socket to work on in the wait queue */ |
967 | while ((slp = TAILQ_FIRST(&nfsrv_sockwait))) { |
968 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
969 | /* remove from the head of the queue */ |
970 | TAILQ_REMOVE(&nfsrv_sockwait, slp, ns_svcq); |
971 | slp->ns_flag &= ~SLP_WAITQ; |
972 | if ((slp->ns_flag & SLP_VALID) && (slp->ns_flag & SLP_WORKTODO)) { |
973 | break; |
974 | } |
975 | /* nothing to do, so skip this socket */ |
976 | lck_rw_done(lck: &slp->ns_rwlock); |
977 | } |
978 | } |
979 | if (!slp && !TAILQ_EMPTY(&nfsrv_sockwork)) { |
980 | /* look for a socket to work on in the work queue */ |
981 | while ((slp = TAILQ_FIRST(&nfsrv_sockwork))) { |
982 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
983 | /* remove from the head of the queue */ |
984 | TAILQ_REMOVE(&nfsrv_sockwork, slp, ns_svcq); |
985 | slp->ns_flag &= ~SLP_WORKQ; |
986 | if ((slp->ns_flag & SLP_VALID) && (slp->ns_flag & SLP_WORKTODO)) { |
987 | break; |
988 | } |
989 | /* nothing to do, so skip this socket */ |
990 | lck_rw_done(lck: &slp->ns_rwlock); |
991 | } |
992 | } |
993 | if (!nfsd->nfsd_slp && slp) { |
994 | /* we found a socket to work on, grab a reference */ |
995 | slp->ns_sref++; |
996 | microuptime(tv: &now); |
997 | slp->ns_timestamp = now.tv_sec; |
998 | /* We keep the socket list in least recently used order for reaping idle sockets */ |
999 | TAILQ_REMOVE(&nfsrv_socklist, slp, ns_chain); |
1000 | TAILQ_INSERT_TAIL(&nfsrv_socklist, slp, ns_chain); |
1001 | nfsd->nfsd_slp = slp; |
1002 | opcnt = 0; |
1003 | /* and put it at the back of the work queue */ |
1004 | TAILQ_INSERT_TAIL(&nfsrv_sockwork, slp, ns_svcq); |
1005 | slp->ns_flag |= SLP_WORKQ; |
1006 | lck_rw_done(lck: &slp->ns_rwlock); |
1007 | } |
1008 | lck_mtx_unlock(lck: &nfsd_mutex); |
1009 | if (!slp) { |
1010 | continue; |
1011 | } |
1012 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1013 | if (slp->ns_flag & SLP_VALID) { |
1014 | if ((slp->ns_flag & (SLP_NEEDQ | SLP_DISCONN)) == SLP_NEEDQ) { |
1015 | slp->ns_flag &= ~SLP_NEEDQ; |
1016 | nfsrv_rcv_locked(slp->ns_so, slp, MBUF_WAITOK); |
1017 | } |
1018 | if (slp->ns_flag & SLP_DISCONN) { |
1019 | nfsrv_zapsock(slp); |
1020 | } |
1021 | error = nfsrv_dorec(slp, nfsd, &nd); |
1022 | if (error == EINVAL) { // RPCSEC_GSS drop |
1023 | if (slp->ns_sotype == SOCK_STREAM) { |
1024 | nfsrv_zapsock(slp); // drop connection |
1025 | } |
1026 | } |
1027 | writes_todo = 0; |
1028 | if (error && (slp->ns_wgtime || (slp->ns_flag & SLP_DOWRITES))) { |
1029 | microuptime(tv: &now); |
1030 | cur_usec = (now.tv_sec * 1000000) + now.tv_usec; |
1031 | if (slp->ns_wgtime <= cur_usec) { |
1032 | error = 0; |
1033 | cacherep = RC_DOIT; |
1034 | writes_todo = 1; |
1035 | } |
1036 | slp->ns_flag &= ~SLP_DOWRITES; |
1037 | } |
1038 | nfsd->nfsd_flag |= NFSD_REQINPROG; |
1039 | } |
1040 | lck_rw_done(lck: &slp->ns_rwlock); |
1041 | } |
1042 | if (error || (slp && !(slp->ns_flag & SLP_VALID))) { |
1043 | if (nd) { |
1044 | nfsm_chain_cleanup(&nd->nd_nmreq); |
1045 | if (nd->nd_nam2) { |
1046 | mbuf_freem(mbuf: nd->nd_nam2); |
1047 | } |
1048 | if (IS_VALID_CRED(nd->nd_cr)) { |
1049 | kauth_cred_unref(&nd->nd_cr); |
1050 | } |
1051 | if (nd->nd_gss_context) { |
1052 | nfs_gss_svc_ctx_deref(nd->nd_gss_context); |
1053 | } |
1054 | NFS_ZFREE(nfsrv_descript_zone, nd); |
1055 | } |
1056 | nfsd->nfsd_slp = NULL; |
1057 | nfsd->nfsd_flag &= ~NFSD_REQINPROG; |
1058 | if (slp) { |
1059 | nfsrv_slpderef(slp); |
1060 | } |
1061 | if (nfsd_thread_max <= 0) { |
1062 | break; |
1063 | } |
1064 | continue; |
1065 | } |
1066 | if (nd) { |
1067 | microuptime(tv: &nd->nd_starttime); |
1068 | if (nd->nd_nam2) { |
1069 | nd->nd_nam = nd->nd_nam2; |
1070 | } else { |
1071 | nd->nd_nam = slp->ns_nam; |
1072 | } |
1073 | |
1074 | cacherep = nfsrv_getcache(nd, slp, &mrep); |
1075 | |
1076 | if (nfsrv_require_resv_port) { |
1077 | /* Check if source port is a reserved port */ |
1078 | in_port_t port = 0; |
1079 | struct sockaddr *saddr = mbuf_data(mbuf: nd->nd_nam); |
1080 | |
1081 | if (saddr->sa_family == AF_INET) { |
1082 | port = ntohs(((struct sockaddr_in*)saddr)->sin_port); |
1083 | } else if (saddr->sa_family == AF_INET6) { |
1084 | port = ntohs(((struct sockaddr_in6*)saddr)->sin6_port); |
1085 | } |
1086 | if ((port >= IPPORT_RESERVED) && (nd->nd_procnum != NFSPROC_NULL)) { |
1087 | nd->nd_procnum = NFSPROC_NOOP; |
1088 | nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); |
1089 | cacherep = RC_DOIT; |
1090 | } |
1091 | } |
1092 | } |
1093 | |
1094 | /* |
1095 | * Loop to get all the write RPC replies that have been |
1096 | * gathered together. |
1097 | */ |
1098 | do { |
1099 | switch (cacherep) { |
1100 | case RC_DOIT: |
1101 | if (nd && (nd->nd_vers == NFS_VER3)) { |
1102 | procrastinate = nfsrv_wg_delay_v3; |
1103 | } else { |
1104 | procrastinate = nfsrv_wg_delay; |
1105 | } |
1106 | lck_rw_lock_shared(lck: &nfsrv_export_rwlock); |
1107 | context.vc_ucred = NULL; |
1108 | if (writes_todo || ((nd->nd_procnum == NFSPROC_WRITE) && (procrastinate > 0))) { |
1109 | error = nfsrv_writegather(&nd, slp, &context, &mrep); |
1110 | } else { |
1111 | error = (*(nfsrv_procs[nd->nd_procnum]))(nd, slp, &context, &mrep); |
1112 | } |
1113 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1114 | if (mrep == NULL) { |
1115 | /* |
1116 | * If this is a stream socket and we are not going |
1117 | * to send a reply we better close the connection |
1118 | * so the client doesn't hang. |
1119 | */ |
1120 | if (error && slp->ns_sotype == SOCK_STREAM) { |
1121 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1122 | nfsrv_zapsock(slp); |
1123 | lck_rw_done(lck: &slp->ns_rwlock); |
1124 | printf("NFS server: NULL reply from proc = %d error = %d\n" , |
1125 | nd->nd_procnum, error); |
1126 | } |
1127 | break; |
1128 | } |
1129 | if (error) { |
1130 | OSAddAtomic64(1, &nfsrvstats.srv_errs); |
1131 | nfsrv_updatecache(nd, FALSE, mrep); |
1132 | if (nd->nd_nam2) { |
1133 | mbuf_freem(mbuf: nd->nd_nam2); |
1134 | nd->nd_nam2 = NULL; |
1135 | } |
1136 | break; |
1137 | } |
1138 | OSAddAtomic64(1, &nfsrvstats.srvrpccntv3[nd->nd_procnum]); |
1139 | nfsrv_updatecache(nd, TRUE, mrep); |
1140 | OS_FALLTHROUGH; |
1141 | |
1142 | case RC_REPLY: |
1143 | if (nd->nd_gss_mb != NULL) { // It's RPCSEC_GSS |
1144 | /* |
1145 | * Need to checksum or encrypt the reply |
1146 | */ |
1147 | error = nfs_gss_svc_protect_reply(nd, mrep); |
1148 | if (error) { |
1149 | mbuf_freem(mbuf: mrep); |
1150 | break; |
1151 | } |
1152 | } |
1153 | |
1154 | /* |
1155 | * Get the total size of the reply |
1156 | */ |
1157 | m = mrep; |
1158 | siz = 0; |
1159 | while (m) { |
1160 | siz += mbuf_len(mbuf: m); |
1161 | m = mbuf_next(mbuf: m); |
1162 | } |
1163 | if (siz <= 0 || siz > NFS_MAXPACKET) { |
1164 | printf("mbuf siz=%d\n" , siz); |
1165 | panic("Bad nfs svc reply" ); |
1166 | } |
1167 | m = mrep; |
1168 | mbuf_pkthdr_setlen(mbuf: m, len: siz); |
1169 | error = mbuf_pkthdr_setrcvif(mbuf: m, NULL); |
1170 | if (error) { |
1171 | panic("nfsd setrcvif failed: %d" , error); |
1172 | } |
1173 | /* |
1174 | * For stream protocols, prepend a Sun RPC |
1175 | * Record Mark. |
1176 | */ |
1177 | if (slp->ns_sotype == SOCK_STREAM) { |
1178 | error = mbuf_prepend(mbuf: &m, NFSX_UNSIGNED, how: MBUF_WAITOK); |
1179 | if (!error) { |
1180 | *(u_int32_t*)mbuf_data(mbuf: m) = htonl(0x80000000 | siz); |
1181 | } |
1182 | } |
1183 | if (!error) { |
1184 | if (slp->ns_flag & SLP_VALID) { |
1185 | error = nfsrv_send(slp, nd->nd_nam2, m); |
1186 | } else { |
1187 | error = EPIPE; |
1188 | mbuf_freem(mbuf: m); |
1189 | } |
1190 | } else { |
1191 | mbuf_freem(mbuf: m); |
1192 | } |
1193 | mrep = NULL; |
1194 | if (nd->nd_nam2) { |
1195 | mbuf_freem(mbuf: nd->nd_nam2); |
1196 | nd->nd_nam2 = NULL; |
1197 | } |
1198 | if (error == EPIPE) { |
1199 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1200 | nfsrv_zapsock(slp); |
1201 | lck_rw_done(lck: &slp->ns_rwlock); |
1202 | } |
1203 | if (error == EINTR || error == ERESTART) { |
1204 | nfsm_chain_cleanup(&nd->nd_nmreq); |
1205 | if (IS_VALID_CRED(nd->nd_cr)) { |
1206 | kauth_cred_unref(&nd->nd_cr); |
1207 | } |
1208 | if (nd->nd_gss_context) { |
1209 | nfs_gss_svc_ctx_deref(nd->nd_gss_context); |
1210 | } |
1211 | NFS_ZFREE(nfsrv_descript_zone, nd); |
1212 | nfsrv_slpderef(slp); |
1213 | lck_mtx_lock(lck: &nfsd_mutex); |
1214 | goto done; |
1215 | } |
1216 | break; |
1217 | case RC_DROPIT: |
1218 | mbuf_freem(mbuf: nd->nd_nam2); |
1219 | nd->nd_nam2 = NULL; |
1220 | break; |
1221 | } |
1222 | ; |
1223 | opcnt++; |
1224 | if (nd) { |
1225 | nfsm_chain_cleanup(&nd->nd_nmreq); |
1226 | if (nd->nd_nam2) { |
1227 | mbuf_freem(mbuf: nd->nd_nam2); |
1228 | } |
1229 | if (IS_VALID_CRED(nd->nd_cr)) { |
1230 | kauth_cred_unref(&nd->nd_cr); |
1231 | } |
1232 | if (nd->nd_gss_context) { |
1233 | nfs_gss_svc_ctx_deref(nd->nd_gss_context); |
1234 | } |
1235 | NFS_ZFREE(nfsrv_descript_zone, nd); |
1236 | } |
1237 | |
1238 | /* |
1239 | * Check to see if there are outstanding writes that |
1240 | * need to be serviced. |
1241 | */ |
1242 | writes_todo = 0; |
1243 | if (slp->ns_wgtime) { |
1244 | microuptime(tv: &now); |
1245 | cur_usec = (now.tv_sec * 1000000) + now.tv_usec; |
1246 | if (slp->ns_wgtime <= cur_usec) { |
1247 | cacherep = RC_DOIT; |
1248 | writes_todo = 1; |
1249 | } |
1250 | } |
1251 | } while (writes_todo); |
1252 | |
1253 | nd = NULL; |
1254 | if (TAILQ_EMPTY(&nfsrv_sockwait) && (opcnt < 8)) { |
1255 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1256 | error = nfsrv_dorec(slp, nfsd, &nd); |
1257 | if (error == EINVAL) { // RPCSEC_GSS drop |
1258 | if (slp->ns_sotype == SOCK_STREAM) { |
1259 | nfsrv_zapsock(slp); // drop connection |
1260 | } |
1261 | } |
1262 | lck_rw_done(lck: &slp->ns_rwlock); |
1263 | } |
1264 | if (!nd) { |
1265 | /* drop our reference on the socket */ |
1266 | nfsd->nfsd_flag &= ~NFSD_REQINPROG; |
1267 | nfsd->nfsd_slp = NULL; |
1268 | nfsrv_slpderef(slp); |
1269 | } |
1270 | } |
1271 | lck_mtx_lock(lck: &nfsd_mutex); |
1272 | done: |
1273 | TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); |
1274 | kfree_type(struct nfsd, nfsd); |
1275 | if (--nfsd_thread_count == 0) { |
1276 | nfsrv_cleanup(); |
1277 | } |
1278 | lck_mtx_unlock(lck: &nfsd_mutex); |
1279 | return error; |
1280 | } |
1281 | |
1282 | int |
1283 | nfssvc_export(user_addr_t argp) |
1284 | { |
1285 | int error = 0, is_64bit; |
1286 | struct user_nfs_export_args unxa; |
1287 | vfs_context_t ctx = vfs_context_current(); |
1288 | |
1289 | is_64bit = vfs_context_is64bit(ctx); |
1290 | |
1291 | /* copy in pointers to path and export args */ |
1292 | if (is_64bit) { |
1293 | error = copyin(argp, (caddr_t)&unxa, sizeof(unxa)); |
1294 | } else { |
1295 | struct nfs_export_args tnxa; |
1296 | error = copyin(argp, (caddr_t)&tnxa, sizeof(tnxa)); |
1297 | if (error == 0) { |
1298 | /* munge into LP64 version of nfs_export_args structure */ |
1299 | unxa.nxa_fsid = tnxa.nxa_fsid; |
1300 | unxa.nxa_expid = tnxa.nxa_expid; |
1301 | unxa.nxa_fspath = CAST_USER_ADDR_T(tnxa.nxa_fspath); |
1302 | unxa.nxa_exppath = CAST_USER_ADDR_T(tnxa.nxa_exppath); |
1303 | unxa.nxa_flags = tnxa.nxa_flags; |
1304 | unxa.nxa_netcount = tnxa.nxa_netcount; |
1305 | unxa.nxa_nets = CAST_USER_ADDR_T(tnxa.nxa_nets); |
1306 | } |
1307 | } |
1308 | if (error) { |
1309 | return error; |
1310 | } |
1311 | |
1312 | error = nfsrv_export(&unxa, ctx); |
1313 | |
1314 | return error; |
1315 | } |
1316 | |
1317 | int |
1318 | nfssvc_exportstats(proc_t p, user_addr_t argp) |
1319 | { |
1320 | int error = 0; |
1321 | uint pos; |
1322 | struct nfs_exportfs *nxfs; |
1323 | struct nfs_export *nx; |
1324 | struct nfs_export_stat_desc stat_desc = {}; |
1325 | struct nfs_export_stat_rec statrec; |
1326 | uint numExports, totlen, count; |
1327 | size_t numRecs; |
1328 | user_addr_t oldp, newlenp; |
1329 | user_size_t oldlen, newlen; |
1330 | struct user_iovec iov[2]; |
1331 | |
1332 | error = copyin_user_iovec_array(uaddr: argp, spacetype: IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, count: 2, dst: iov); |
1333 | if (error) { |
1334 | return error; |
1335 | } |
1336 | |
1337 | oldp = iov[0].iov_base; |
1338 | oldlen = iov[0].iov_len; |
1339 | newlenp = iov[1].iov_base; |
1340 | newlen = iov[1].iov_len; |
1341 | |
1342 | /* setup export stat descriptor */ |
1343 | stat_desc.rec_vers = NFS_EXPORT_STAT_REC_VERSION; |
1344 | |
1345 | if (!nfsrv_is_initialized()) { |
1346 | stat_desc.rec_count = 0; |
1347 | if (oldp && (oldlen >= sizeof(struct nfs_export_stat_desc))) { |
1348 | error = copyout(&stat_desc, oldp, sizeof(struct nfs_export_stat_desc)); |
1349 | } |
1350 | size_t stat_desc_size = sizeof(struct nfs_export_stat_desc); |
1351 | if (!error && newlenp && newlen >= sizeof(stat_desc_size)) { |
1352 | error = copyout(&stat_desc_size, newlenp, sizeof(stat_desc_size)); |
1353 | } |
1354 | return error; |
1355 | } |
1356 | |
1357 | /* Count the number of exported directories */ |
1358 | lck_rw_lock_shared(lck: &nfsrv_export_rwlock); |
1359 | numExports = 0; |
1360 | LIST_FOREACH(nxfs, &nfsrv_exports, nxfs_next) |
1361 | LIST_FOREACH(nx, &nxfs->nxfs_exports, nx_next) |
1362 | numExports += 1; |
1363 | |
1364 | /* update stat descriptor's export record count */ |
1365 | stat_desc.rec_count = numExports; |
1366 | |
1367 | /* calculate total size of required buffer */ |
1368 | totlen = sizeof(struct nfs_export_stat_desc) + (numExports * sizeof(struct nfs_export_stat_rec)); |
1369 | |
1370 | /* Check caller's buffer */ |
1371 | if (oldp == 0 || newlenp == 0) { |
1372 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1373 | /* indicate required buffer len */ |
1374 | if (newlenp && newlen >= sizeof(totlen)) { |
1375 | error = copyout(&totlen, newlenp, sizeof(totlen)); |
1376 | } |
1377 | return error; |
1378 | } |
1379 | |
1380 | /* We require the caller's buffer to be at least large enough to hold the descriptor */ |
1381 | if (oldlen < sizeof(struct nfs_export_stat_desc) || newlen < sizeof(totlen)) { |
1382 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1383 | /* indicate required buffer len */ |
1384 | if (newlenp && newlen >= sizeof(totlen)) { |
1385 | (void)copyout(&totlen, newlenp, sizeof(totlen)); |
1386 | } |
1387 | return ENOMEM; |
1388 | } |
1389 | |
1390 | /* indicate required buffer len */ |
1391 | error = copyout(&totlen, newlenp, sizeof(totlen)); |
1392 | if (error) { |
1393 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1394 | return error; |
1395 | } |
1396 | |
1397 | /* check if export table is empty */ |
1398 | if (!numExports) { |
1399 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1400 | error = copyout(&stat_desc, oldp, sizeof(struct nfs_export_stat_desc)); |
1401 | return error; |
1402 | } |
1403 | |
1404 | /* calculate how many actual export stat records fit into caller's buffer */ |
1405 | numRecs = (totlen - sizeof(struct nfs_export_stat_desc)) / sizeof(struct nfs_export_stat_rec); |
1406 | |
1407 | if (!numRecs) { |
1408 | /* caller's buffer can only accomodate descriptor */ |
1409 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1410 | stat_desc.rec_count = 0; |
1411 | error = copyout(&stat_desc, oldp, sizeof(struct nfs_export_stat_desc)); |
1412 | return error; |
1413 | } |
1414 | |
1415 | /* adjust to actual number of records to copyout to caller's buffer */ |
1416 | if (numRecs > numExports) { |
1417 | numRecs = numExports; |
1418 | } |
1419 | |
1420 | /* set actual number of records we are returning */ |
1421 | stat_desc.rec_count = numRecs; |
1422 | |
1423 | /* first copy out the stat descriptor */ |
1424 | pos = 0; |
1425 | error = copyout(&stat_desc, oldp + pos, sizeof(struct nfs_export_stat_desc)); |
1426 | if (error) { |
1427 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1428 | return error; |
1429 | } |
1430 | pos += sizeof(struct nfs_export_stat_desc); |
1431 | |
1432 | /* Loop through exported directories */ |
1433 | count = 0; |
1434 | LIST_FOREACH(nxfs, &nfsrv_exports, nxfs_next) { |
1435 | LIST_FOREACH(nx, &nxfs->nxfs_exports, nx_next) { |
1436 | if (count >= numRecs) { |
1437 | break; |
1438 | } |
1439 | |
1440 | /* build exported filesystem path */ |
1441 | memset(s: statrec.path, c: 0, n: sizeof(statrec.path)); |
1442 | snprintf(statrec.path, count: sizeof(statrec.path), "%s%s%s" , |
1443 | nxfs->nxfs_path, ((nxfs->nxfs_path[1] && nx->nx_path[0]) ? "/" : "" ), |
1444 | nx->nx_path); |
1445 | |
1446 | /* build the 64-bit export stat counters */ |
1447 | statrec.ops = ((uint64_t)nx->nx_stats.ops.hi << 32) | |
1448 | nx->nx_stats.ops.lo; |
1449 | statrec.bytes_read = ((uint64_t)nx->nx_stats.bytes_read.hi << 32) | |
1450 | nx->nx_stats.bytes_read.lo; |
1451 | statrec.bytes_written = ((uint64_t)nx->nx_stats.bytes_written.hi << 32) | |
1452 | nx->nx_stats.bytes_written.lo; |
1453 | error = copyout(&statrec, oldp + pos, sizeof(statrec)); |
1454 | if (error) { |
1455 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1456 | return error; |
1457 | } |
1458 | /* advance buffer position */ |
1459 | pos += sizeof(statrec); |
1460 | } |
1461 | } |
1462 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1463 | |
1464 | return error; |
1465 | } |
1466 | |
1467 | int |
1468 | nfssvc_userstats(proc_t p, user_addr_t argp) |
1469 | { |
1470 | int error = 0; |
1471 | struct nfs_exportfs *nxfs; |
1472 | struct nfs_export *nx; |
1473 | struct nfs_active_user_list *ulist; |
1474 | struct nfs_user_stat_desc ustat_desc = {}; |
1475 | struct nfs_user_stat_node *unode, *unode_next; |
1476 | struct nfs_user_stat_user_rec ustat_rec; |
1477 | struct nfs_user_stat_path_rec upath_rec; |
1478 | uint bytes_total, recs_copied, pos; |
1479 | size_t bytes_avail; |
1480 | user_addr_t oldp, newlenp; |
1481 | user_size_t oldlen, newlen; |
1482 | struct user_iovec iov[2]; |
1483 | |
1484 | error = copyin_user_iovec_array(uaddr: argp, spacetype: IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, count: 2, dst: iov); |
1485 | if (error) { |
1486 | return error; |
1487 | } |
1488 | |
1489 | oldp = iov[0].iov_base; |
1490 | oldlen = iov[0].iov_len; |
1491 | newlenp = iov[1].iov_base; |
1492 | newlen = iov[1].iov_len; |
1493 | |
1494 | /* init structures used for copying out of kernel */ |
1495 | ustat_desc.rec_vers = NFS_USER_STAT_REC_VERSION; |
1496 | ustat_rec.rec_type = NFS_USER_STAT_USER_REC; |
1497 | upath_rec.rec_type = NFS_USER_STAT_PATH_REC; |
1498 | |
1499 | /* initialize counters */ |
1500 | bytes_total = sizeof(struct nfs_user_stat_desc); |
1501 | bytes_avail = oldlen; |
1502 | recs_copied = 0; |
1503 | |
1504 | if (!nfsrv_is_initialized()) { /* NFS server not initialized, so no stats */ |
1505 | goto ustat_skip; |
1506 | } |
1507 | |
1508 | /* reclaim old expired user nodes */ |
1509 | nfsrv_active_user_list_reclaim(); |
1510 | |
1511 | /* reserve space for the buffer descriptor */ |
1512 | if (bytes_avail >= sizeof(struct nfs_user_stat_desc)) { |
1513 | bytes_avail -= sizeof(struct nfs_user_stat_desc); |
1514 | } else { |
1515 | bytes_avail = 0; |
1516 | } |
1517 | |
1518 | /* put buffer position past the buffer descriptor */ |
1519 | pos = sizeof(struct nfs_user_stat_desc); |
1520 | |
1521 | /* Loop through exported directories */ |
1522 | lck_rw_lock_shared(lck: &nfsrv_export_rwlock); |
1523 | LIST_FOREACH(nxfs, &nfsrv_exports, nxfs_next) { |
1524 | LIST_FOREACH(nx, &nxfs->nxfs_exports, nx_next) { |
1525 | /* copy out path */ |
1526 | if (bytes_avail >= sizeof(struct nfs_user_stat_path_rec)) { |
1527 | memset(s: upath_rec.path, c: 0, n: sizeof(upath_rec.path)); |
1528 | snprintf(upath_rec.path, count: sizeof(upath_rec.path), "%s%s%s" , |
1529 | nxfs->nxfs_path, ((nxfs->nxfs_path[1] && nx->nx_path[0]) ? "/" : "" ), |
1530 | nx->nx_path); |
1531 | |
1532 | error = copyout(&upath_rec, oldp + pos, sizeof(struct nfs_user_stat_path_rec)); |
1533 | if (error) { |
1534 | /* punt */ |
1535 | goto ustat_done; |
1536 | } |
1537 | |
1538 | pos += sizeof(struct nfs_user_stat_path_rec); |
1539 | bytes_avail -= sizeof(struct nfs_user_stat_path_rec); |
1540 | recs_copied++; |
1541 | } else { |
1542 | /* Caller's buffer is exhausted */ |
1543 | bytes_avail = 0; |
1544 | } |
1545 | |
1546 | bytes_total += sizeof(struct nfs_user_stat_path_rec); |
1547 | |
1548 | /* Scan through all user nodes of this export */ |
1549 | ulist = &nx->nx_user_list; |
1550 | lck_mtx_lock(lck: &ulist->user_mutex); |
1551 | for (unode = TAILQ_FIRST(&ulist->user_lru); unode; unode = unode_next) { |
1552 | unode_next = TAILQ_NEXT(unode, lru_link); |
1553 | |
1554 | /* copy out node if there is space */ |
1555 | if (bytes_avail >= sizeof(struct nfs_user_stat_user_rec)) { |
1556 | /* prepare a user stat rec for copying out */ |
1557 | ustat_rec.uid = unode->uid; |
1558 | memset(s: &ustat_rec.sock, c: 0, n: sizeof(ustat_rec.sock)); |
1559 | bcopy(src: &unode->sock, dst: &ustat_rec.sock, n: unode->sock.ss_len); |
1560 | ustat_rec.ops = unode->ops; |
1561 | ustat_rec.bytes_read = unode->bytes_read; |
1562 | ustat_rec.bytes_written = unode->bytes_written; |
1563 | ustat_rec.tm_start = unode->tm_start; |
1564 | ustat_rec.tm_last = unode->tm_last; |
1565 | |
1566 | error = copyout(&ustat_rec, oldp + pos, sizeof(struct nfs_user_stat_user_rec)); |
1567 | |
1568 | if (error) { |
1569 | /* punt */ |
1570 | lck_mtx_unlock(lck: &ulist->user_mutex); |
1571 | goto ustat_done; |
1572 | } |
1573 | |
1574 | pos += sizeof(struct nfs_user_stat_user_rec); |
1575 | bytes_avail -= sizeof(struct nfs_user_stat_user_rec); |
1576 | recs_copied++; |
1577 | } else { |
1578 | /* Caller's buffer is exhausted */ |
1579 | bytes_avail = 0; |
1580 | } |
1581 | bytes_total += sizeof(struct nfs_user_stat_user_rec); |
1582 | } |
1583 | /* can unlock this export's list now */ |
1584 | lck_mtx_unlock(lck: &ulist->user_mutex); |
1585 | } |
1586 | } |
1587 | |
1588 | ustat_done: |
1589 | /* unlock the export table */ |
1590 | lck_rw_done(lck: &nfsrv_export_rwlock); |
1591 | |
1592 | ustat_skip: |
1593 | /* indicate number of actual records copied */ |
1594 | ustat_desc.rec_count = recs_copied; |
1595 | |
1596 | if (!error) { |
1597 | /* check if there was enough room for the buffer descriptor */ |
1598 | if (oldlen >= sizeof(struct nfs_user_stat_desc)) { |
1599 | error = copyout(&ustat_desc, oldp, sizeof(struct nfs_user_stat_desc)); |
1600 | } else { |
1601 | error = ENOMEM; |
1602 | } |
1603 | |
1604 | /* always indicate required buffer size */ |
1605 | if (!error && newlenp && newlen >= sizeof(bytes_total)) { |
1606 | error = copyout(&bytes_total, newlenp, sizeof(bytes_total)); |
1607 | } |
1608 | } |
1609 | return error; |
1610 | } |
1611 | |
1612 | int |
1613 | nfssvc_usercount(proc_t p, user_addr_t argp) |
1614 | { |
1615 | int error; |
1616 | user_addr_t oldp, newlenp; |
1617 | user_size_t oldlen, newlen; |
1618 | struct user_iovec iov[2]; |
1619 | size_t stat_size = sizeof(nfsrv_user_stat_node_count); |
1620 | |
1621 | error = copyin_user_iovec_array(uaddr: argp, spacetype: IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, count: 2, dst: iov); |
1622 | if (error) { |
1623 | return error; |
1624 | } |
1625 | |
1626 | oldp = iov[0].iov_base; |
1627 | oldlen = iov[0].iov_len; |
1628 | newlenp = iov[1].iov_base; |
1629 | newlen = iov[1].iov_len; |
1630 | |
1631 | if (!oldp) { |
1632 | if (newlenp && newlen >= sizeof(stat_size)) { |
1633 | error = copyout(&stat_size, newlenp, sizeof(stat_size)); |
1634 | } |
1635 | return error; |
1636 | } |
1637 | |
1638 | if (oldlen < stat_size) { |
1639 | if (newlenp && newlen >= sizeof(stat_size)) { |
1640 | (void)copyout(&stat_size, newlenp, sizeof(stat_size)); |
1641 | } |
1642 | return ENOMEM; |
1643 | } |
1644 | |
1645 | if (nfsrv_is_initialized()) { |
1646 | /* reclaim old expired user nodes */ |
1647 | nfsrv_active_user_list_reclaim(); |
1648 | } |
1649 | |
1650 | error = copyout(&nfsrv_user_stat_node_count, oldp, sizeof(nfsrv_user_stat_node_count)); |
1651 | |
1652 | return error; |
1653 | } |
1654 | |
1655 | int |
1656 | nfssvc_zerostats(void) |
1657 | { |
1658 | bzero(s: &nfsrvstats, n: sizeof nfsrvstats); |
1659 | return 0; |
1660 | } |
1661 | |
1662 | int |
1663 | nfssvc_srvstats(proc_t p, user_addr_t argp) |
1664 | { |
1665 | int error; |
1666 | user_addr_t oldp, newlenp; |
1667 | user_size_t oldlen, newlen; |
1668 | struct user_iovec iov[2]; |
1669 | size_t stat_size = sizeof(nfsrvstats); |
1670 | |
1671 | error = copyin_user_iovec_array(uaddr: argp, spacetype: IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, count: 2, dst: iov); |
1672 | if (error) { |
1673 | return error; |
1674 | } |
1675 | |
1676 | oldp = iov[0].iov_base; |
1677 | oldlen = iov[0].iov_len; |
1678 | newlenp = iov[1].iov_base; |
1679 | newlen = iov[1].iov_len; |
1680 | |
1681 | if (!oldp) { |
1682 | if (newlenp && newlen >= sizeof(stat_size)) { |
1683 | error = copyout(&stat_size, newlenp, sizeof(stat_size)); |
1684 | } |
1685 | return error; |
1686 | } |
1687 | |
1688 | if (oldlen < stat_size) { |
1689 | if (newlenp && newlen >= sizeof(stat_size)) { |
1690 | (void)copyout(&stat_size, newlenp, sizeof(stat_size)); |
1691 | } |
1692 | return ENOMEM; |
1693 | } |
1694 | |
1695 | error = copyout(&nfsrvstats, oldp, stat_size); |
1696 | if (error) { |
1697 | return error; |
1698 | } |
1699 | |
1700 | return 0; |
1701 | } |
1702 | |
1703 | /* |
1704 | * Shut down a socket associated with an nfsrv_sock structure. |
1705 | * Should be called with the send lock set, if required. |
1706 | * The trick here is to increment the sref at the start, so that the nfsds |
1707 | * will stop using it and clear ns_flag at the end so that it will not be |
1708 | * reassigned during cleanup. |
1709 | */ |
1710 | void |
1711 | nfsrv_zapsock(struct nfsrv_sock *slp) |
1712 | { |
1713 | socket_t so; |
1714 | |
1715 | if ((slp->ns_flag & SLP_VALID) == 0) { |
1716 | return; |
1717 | } |
1718 | slp->ns_flag &= ~SLP_ALLFLAGS; |
1719 | |
1720 | so = slp->ns_so; |
1721 | if (so == NULL) { |
1722 | return; |
1723 | } |
1724 | |
1725 | sock_setupcall(sock: so, NULL, NULL); |
1726 | sock_shutdown(so, SHUT_RDWR); |
1727 | |
1728 | /* |
1729 | * Remove from the up-call queue |
1730 | */ |
1731 | nfsrv_uc_dequeue(slp); |
1732 | } |
1733 | |
1734 | /* |
1735 | * cleanup and release a server socket structure. |
1736 | */ |
1737 | void |
1738 | nfsrv_slpfree(struct nfsrv_sock *slp) |
1739 | { |
1740 | struct nfsrv_descript *nwp, *nnwp; |
1741 | |
1742 | if (slp->ns_so) { |
1743 | sock_release(so: slp->ns_so); |
1744 | slp->ns_so = NULL; |
1745 | } |
1746 | if (slp->ns_recslen) { |
1747 | OSAddAtomic(-slp->ns_recslen, &nfsrv_unprocessed_rpc_current); |
1748 | } |
1749 | if (slp->ns_nam) { |
1750 | mbuf_free(mbuf: slp->ns_nam); |
1751 | } |
1752 | if (slp->ns_raw) { |
1753 | mbuf_freem(mbuf: slp->ns_raw); |
1754 | } |
1755 | if (slp->ns_rec) { |
1756 | mbuf_freem(mbuf: slp->ns_rec); |
1757 | } |
1758 | if (slp->ns_frag) { |
1759 | mbuf_freem(mbuf: slp->ns_frag); |
1760 | } |
1761 | slp->ns_nam = slp->ns_raw = slp->ns_rec = slp->ns_frag = NULL; |
1762 | slp->ns_reccnt = 0; |
1763 | |
1764 | for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { |
1765 | nnwp = nwp->nd_tq.le_next; |
1766 | LIST_REMOVE(nwp, nd_tq); |
1767 | nfsm_chain_cleanup(&nwp->nd_nmreq); |
1768 | if (nwp->nd_mrep) { |
1769 | mbuf_freem(mbuf: nwp->nd_mrep); |
1770 | } |
1771 | if (nwp->nd_nam2) { |
1772 | mbuf_freem(mbuf: nwp->nd_nam2); |
1773 | } |
1774 | if (IS_VALID_CRED(nwp->nd_cr)) { |
1775 | kauth_cred_unref(&nwp->nd_cr); |
1776 | } |
1777 | if (nwp->nd_gss_context) { |
1778 | nfs_gss_svc_ctx_deref(nwp->nd_gss_context); |
1779 | } |
1780 | NFS_ZFREE(nfsrv_descript_zone, nwp); |
1781 | } |
1782 | LIST_INIT(&slp->ns_tq); |
1783 | |
1784 | lck_rw_destroy(lck: &slp->ns_rwlock, grp: &nfsrv_slp_rwlock_group); |
1785 | lck_mtx_destroy(lck: &slp->ns_wgmutex, grp: &nfsrv_slp_mutex_group); |
1786 | kfree_type(struct nfsrv_sock, slp); |
1787 | } |
1788 | |
1789 | /* |
1790 | * Derefence a server socket structure. If it has no more references and |
1791 | * is no longer valid, you can throw it away. |
1792 | */ |
1793 | static void |
1794 | nfsrv_slpderef_locked(struct nfsrv_sock *slp) |
1795 | { |
1796 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1797 | slp->ns_sref--; |
1798 | |
1799 | if (slp->ns_sref || (slp->ns_flag & SLP_VALID)) { |
1800 | if ((slp->ns_flag & SLP_QUEUED) && !(slp->ns_flag & SLP_WORKTODO)) { |
1801 | /* remove socket from queue since there's no work */ |
1802 | if (slp->ns_flag & SLP_WAITQ) { |
1803 | TAILQ_REMOVE(&nfsrv_sockwait, slp, ns_svcq); |
1804 | } else { |
1805 | TAILQ_REMOVE(&nfsrv_sockwork, slp, ns_svcq); |
1806 | } |
1807 | slp->ns_flag &= ~SLP_QUEUED; |
1808 | } |
1809 | lck_rw_done(lck: &slp->ns_rwlock); |
1810 | return; |
1811 | } |
1812 | |
1813 | /* This socket is no longer valid, so we'll get rid of it */ |
1814 | |
1815 | if (slp->ns_flag & SLP_QUEUED) { |
1816 | if (slp->ns_flag & SLP_WAITQ) { |
1817 | TAILQ_REMOVE(&nfsrv_sockwait, slp, ns_svcq); |
1818 | } else { |
1819 | TAILQ_REMOVE(&nfsrv_sockwork, slp, ns_svcq); |
1820 | } |
1821 | slp->ns_flag &= ~SLP_QUEUED; |
1822 | } |
1823 | lck_rw_done(lck: &slp->ns_rwlock); |
1824 | |
1825 | TAILQ_REMOVE(&nfsrv_socklist, slp, ns_chain); |
1826 | if (slp->ns_sotype == SOCK_STREAM) { |
1827 | nfsrv_sock_tcp_cnt--; |
1828 | } |
1829 | |
1830 | /* now remove from the write gather socket list */ |
1831 | if (slp->ns_wgq.tqe_next != SLPNOLIST) { |
1832 | TAILQ_REMOVE(&nfsrv_sockwg, slp, ns_wgq); |
1833 | slp->ns_wgq.tqe_next = SLPNOLIST; |
1834 | } |
1835 | nfsrv_slpfree(slp); |
1836 | } |
1837 | |
1838 | void |
1839 | nfsrv_slpderef(struct nfsrv_sock *slp) |
1840 | { |
1841 | lck_mtx_lock(lck: &nfsd_mutex); |
1842 | nfsrv_slpderef_locked(slp); |
1843 | lck_mtx_unlock(lck: &nfsd_mutex); |
1844 | } |
1845 | |
1846 | /* |
1847 | * Check periodically for idle sockest if needed and |
1848 | * zap them. |
1849 | */ |
1850 | void |
1851 | nfsrv_idlesock_timer(__unused void *param0, __unused void *param1) |
1852 | { |
1853 | struct nfsrv_sock *slp, *tslp; |
1854 | struct timeval now; |
1855 | time_t time_to_wait = nfsrv_sock_idle_timeout; |
1856 | |
1857 | microuptime(tv: &now); |
1858 | lck_mtx_lock(lck: &nfsd_mutex); |
1859 | |
1860 | /* Turn off the timer if we're suppose to and get out */ |
1861 | if (nfsrv_sock_idle_timeout < NFSD_MIN_IDLE_TIMEOUT) { |
1862 | nfsrv_sock_idle_timeout = 0; |
1863 | } |
1864 | if ((nfsrv_sock_tcp_cnt <= 2 * nfsd_thread_max) || (nfsrv_sock_idle_timeout == 0)) { |
1865 | nfsrv_idlesock_timer_on = 0; |
1866 | lck_mtx_unlock(lck: &nfsd_mutex); |
1867 | return; |
1868 | } |
1869 | |
1870 | TAILQ_FOREACH_SAFE(slp, &nfsrv_socklist, ns_chain, tslp) { |
1871 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1872 | /* Skip udp and referenced sockets */ |
1873 | if (slp->ns_sotype == SOCK_DGRAM || slp->ns_sref) { |
1874 | lck_rw_done(lck: &slp->ns_rwlock); |
1875 | continue; |
1876 | } |
1877 | /* |
1878 | * If this is the first non-referenced socket that hasn't idle out, |
1879 | * use its time stamp to calculate the earlist time in the future |
1880 | * to start the next invocation of the timer. Since the nfsrv_socklist |
1881 | * is sorted oldest access to newest. Once we find the first one, |
1882 | * we're done and break out of the loop. |
1883 | */ |
1884 | if (((slp->ns_timestamp + nfsrv_sock_idle_timeout) > now.tv_sec) || |
1885 | nfsrv_sock_tcp_cnt <= 2 * nfsd_thread_max) { |
1886 | time_to_wait -= now.tv_sec - slp->ns_timestamp; |
1887 | if (time_to_wait < 1) { |
1888 | time_to_wait = 1; |
1889 | } |
1890 | lck_rw_done(lck: &slp->ns_rwlock); |
1891 | break; |
1892 | } |
1893 | /* |
1894 | * Bump the ref count. nfsrv_slpderef below will destroy |
1895 | * the socket, since nfsrv_zapsock has closed it. |
1896 | */ |
1897 | slp->ns_sref++; |
1898 | nfsrv_zapsock(slp); |
1899 | lck_rw_done(lck: &slp->ns_rwlock); |
1900 | nfsrv_slpderef_locked(slp); |
1901 | } |
1902 | |
1903 | /* Start ourself back up */ |
1904 | nfs_interval_timer_start(nfsrv_idlesock_timer_call, time_to_wait * 1000); |
1905 | /* Remember when the next timer will fire for nfssvc_addsock. */ |
1906 | nfsrv_idlesock_timer_on = now.tv_sec + time_to_wait; |
1907 | lck_mtx_unlock(lck: &nfsd_mutex); |
1908 | } |
1909 | |
1910 | /* |
1911 | * Clean up the data structures for the server. |
1912 | */ |
1913 | void |
1914 | nfsrv_cleanup(void) |
1915 | { |
1916 | struct nfsrv_sock *slp, *nslp; |
1917 | struct timeval now; |
1918 | #if CONFIG_FSE |
1919 | struct nfsrv_fmod *fp, *nfp; |
1920 | int i; |
1921 | #endif |
1922 | |
1923 | microuptime(tv: &now); |
1924 | for (slp = TAILQ_FIRST(&nfsrv_socklist); slp != 0; slp = nslp) { |
1925 | nslp = TAILQ_NEXT(slp, ns_chain); |
1926 | lck_rw_lock_exclusive(lck: &slp->ns_rwlock); |
1927 | slp->ns_sref++; |
1928 | if (slp->ns_flag & SLP_VALID) { |
1929 | nfsrv_zapsock(slp); |
1930 | } |
1931 | lck_rw_done(lck: &slp->ns_rwlock); |
1932 | nfsrv_slpderef_locked(slp); |
1933 | } |
1934 | # |
1935 | #if CONFIG_FSE |
1936 | /* |
1937 | * Flush pending file write fsevents |
1938 | */ |
1939 | lck_mtx_lock(lck: &nfsrv_fmod_mutex); |
1940 | for (i = 0; i < NFSRVFMODHASHSZ; i++) { |
1941 | for (fp = LIST_FIRST(&nfsrv_fmod_hashtbl[i]); fp; fp = nfp) { |
1942 | /* |
1943 | * Fire off the content modified fsevent for each |
1944 | * entry, remove it from the list, and free it. |
1945 | */ |
1946 | if (nfsrv_fsevents_enabled) { |
1947 | fp->fm_context.vc_thread = current_thread(); |
1948 | add_fsevent(FSE_CONTENT_MODIFIED, &fp->fm_context, |
1949 | FSE_ARG_VNODE, fp->fm_vp, |
1950 | FSE_ARG_DONE); |
1951 | } |
1952 | vnode_put(vp: fp->fm_vp); |
1953 | kauth_cred_unref(&fp->fm_context.vc_ucred); |
1954 | nfp = LIST_NEXT(fp, fm_link); |
1955 | LIST_REMOVE(fp, fm_link); |
1956 | kfree_type(struct nfsrv_fmod, fp); |
1957 | } |
1958 | } |
1959 | nfsrv_fmod_pending = 0; |
1960 | lck_mtx_unlock(lck: &nfsrv_fmod_mutex); |
1961 | #endif |
1962 | |
1963 | nfsrv_uc_cleanup(); /* Stop nfs socket up-call threads */ |
1964 | |
1965 | nfs_gss_svc_cleanup(); /* Remove any RPCSEC_GSS contexts */ |
1966 | |
1967 | nfsrv_cleancache(); /* And clear out server cache */ |
1968 | |
1969 | nfsrv_udpsock = NULL; |
1970 | nfsrv_udp6sock = NULL; |
1971 | } |
1972 | |
1973 | #endif /* CONFIG_NFS_SERVER */ |
1974 | |