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971b93e3 KM |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Rick Macklem at The University of Guelph. | |
7 | * | |
8 | * Redistribution and use in source and binary forms are permitted | |
9 | * provided that the above copyright notice and this paragraph are | |
10 | * duplicated in all such forms and that any documentation, | |
11 | * advertising materials, and other materials related to such | |
12 | * distribution and use acknowledge that the software was developed | |
13 | * by the University of California, Berkeley. The name of the | |
14 | * University may not be used to endorse or promote products derived | |
15 | * from this software without specific prior written permission. | |
16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
19 | * | |
107d27c5 | 20 | * @(#)nfs_serv.c 7.5 (Berkeley) %G% |
971b93e3 KM |
21 | */ |
22 | ||
23 | /* | |
24 | * nfs version 2 server calls to vnode ops | |
25 | * - these routines generally have 3 phases | |
26 | * 1 - break down and validate rpc request in mbuf list | |
27 | * 2 - do the vnode ops for the request | |
36c3043b | 28 | * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) |
971b93e3 KM |
29 | * 3 - build the rpc reply in an mbuf list |
30 | * nb: | |
31 | * - do not mix the phases, since the nfsm_?? macros can return failures | |
32 | * on mbuf exhaustion or similar and do not do any vrele() or vput()'s | |
33 | * | |
36c3043b | 34 | * - the nfsm_reply() macro generates an nfs rpc reply with the nfs |
971b93e3 | 35 | * error number iff error != 0 whereas |
36c3043b KM |
36 | * nfsm_srverr simply drops the mbufs and gives up |
37 | * (==> nfsm_srverr implies an error here at the server, usually mbuf | |
971b93e3 KM |
38 | * exhaustion) |
39 | */ | |
40 | ||
41 | #include "strings.h" | |
42 | #include "time.h" | |
43 | #include "param.h" | |
44 | #include "mount.h" | |
45 | #include "malloc.h" | |
46 | #include "mbuf.h" | |
47 | #include "file.h" | |
48 | #include "user.h" | |
49 | #include "../ufs/dir.h" | |
50 | #include "vnode.h" | |
51 | #include "uio.h" | |
52 | #include "ucred.h" | |
53 | #include "namei.h" | |
54 | #include "errno.h" | |
55 | #include "../ufs/inode.h" | |
56 | #include "nfsv2.h" | |
57 | #include "nfs.h" | |
58 | #include "xdr_subs.h" | |
59 | #include "nfsm_subs.h" | |
60 | ||
61 | /* Defs */ | |
36c3043b KM |
62 | #define TRUE 1 |
63 | #define FALSE 0 | |
971b93e3 KM |
64 | |
65 | /* Global vars */ | |
66 | extern u_long nfs_procids[NFS_NPROCS]; | |
67 | extern u_long nfs_xdrneg1; | |
68 | extern u_long nfs_false, nfs_true; | |
69 | nfstype nfs_type[VSOCK+1]={ NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, }; | |
70 | ||
71 | /* | |
72 | * nfs getattr service | |
73 | */ | |
74 | nfsrv_getattr(mrep, md, dpos, cred, xid, mrq) | |
75 | struct mbuf **mrq; | |
76 | struct mbuf *mrep, *md; | |
77 | caddr_t dpos; | |
78 | struct ucred *cred; | |
79 | u_long xid; | |
80 | { | |
81 | struct vattr va; | |
82 | register struct vattr *vap = &va; | |
83 | struct vnode *vp; | |
84 | nfsv2fh_t nfh; | |
85 | fhandle_t *fhp; | |
86 | nfsm_srvars; | |
87 | ||
88 | fhp = &nfh.fh_generic; | |
89 | nfsm_srvmtofh(fhp); | |
90 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) | |
91 | nfsm_reply(0); | |
92 | error = VOP_GETATTR(vp, vap, cred); | |
93 | vput(vp); | |
94 | nfsm_reply(NFSX_FATTR); | |
95 | nfsm_build(p, u_long *, NFSX_FATTR); | |
96 | *p++ = vtonfs_type(vap->va_type); | |
97 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
98 | *p++ = txdr_unsigned(vap->va_nlink); | |
99 | *p++ = txdr_unsigned(vap->va_uid); | |
100 | *p++ = txdr_unsigned(vap->va_gid); | |
101 | *p++ = txdr_unsigned(vap->va_size); | |
102 | *p++ = txdr_unsigned(vap->va_blocksize); | |
103 | *p++ = txdr_unsigned(vap->va_rdev); | |
104 | *p++ = txdr_unsigned(vap->va_bytes); | |
105 | *p++ = txdr_unsigned(vap->va_fsid); | |
106 | *p++ = txdr_unsigned(vap->va_fileid); | |
107 | txdr_time(&(vap->va_atime), p); | |
108 | p += 2; | |
109 | txdr_time(&(vap->va_mtime), p); | |
110 | p += 2; | |
111 | txdr_time(&(vap->va_ctime), p); | |
112 | nfsm_srvdone; | |
113 | } | |
114 | ||
115 | /* | |
116 | * nfs setattr service | |
117 | */ | |
118 | nfsrv_setattr(mrep, md, dpos, cred, xid, mrq) | |
119 | struct mbuf **mrq; | |
120 | struct mbuf *mrep, *md; | |
121 | caddr_t dpos; | |
122 | struct ucred *cred; | |
123 | u_long xid; | |
124 | { | |
125 | struct vattr va; | |
126 | register struct vattr *vap = &va; | |
127 | struct vnode *vp; | |
128 | nfsv2fh_t nfh; | |
129 | fhandle_t *fhp; | |
130 | nfsm_srvars; | |
131 | ||
132 | fhp = &nfh.fh_generic; | |
133 | nfsm_srvmtofh(fhp); | |
134 | nfsm_disect(p, u_long *, NFSX_SATTR); | |
135 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) | |
136 | nfsm_reply(0); | |
24ed1a73 | 137 | if (error = nfsrv_access(vp, VWRITE, cred)) |
971b93e3 | 138 | goto out; |
971b93e3 KM |
139 | vattr_null(vap); |
140 | /* | |
141 | * Nah nah nah nah na nah | |
142 | * There is a bug in the Sun client that puts 0xffff in the mode | |
143 | * field of sattr when it should put in 0xffffffff. The u_short | |
144 | * doesn't sign extend. | |
145 | * --> check the low order 2 bytes for 0xffff | |
146 | */ | |
147 | if ((fxdr_unsigned(int, *p) & 0xffff) != 0xffff) | |
148 | vap->va_mode = nfstov_mode(*p); | |
149 | if (*++p != nfs_xdrneg1) | |
150 | vap->va_uid = fxdr_unsigned(uid_t, *p); | |
151 | if (*++p != nfs_xdrneg1) | |
152 | vap->va_gid = fxdr_unsigned(gid_t, *p); | |
36c3043b | 153 | if (*++p != nfs_xdrneg1) { |
971b93e3 | 154 | vap->va_size = fxdr_unsigned(u_long, *p); |
36c3043b | 155 | } |
971b93e3 KM |
156 | if (*++p != nfs_xdrneg1) |
157 | fxdr_time(p, &(vap->va_atime)); | |
158 | p += 2; | |
159 | if (*p != nfs_xdrneg1) | |
160 | fxdr_time(p, &(vap->va_mtime)); | |
161 | if (error = VOP_SETATTR(vp, vap, cred)) { | |
162 | vput(vp); | |
163 | nfsm_reply(0); | |
164 | } | |
165 | error = VOP_GETATTR(vp, vap, cred); | |
166 | out: | |
167 | vput(vp); | |
168 | nfsm_reply(NFSX_FATTR); | |
169 | nfsm_build(p, u_long *, NFSX_FATTR); | |
170 | *p++ = vtonfs_type(vap->va_type); | |
171 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
172 | *p++ = txdr_unsigned(vap->va_nlink); | |
173 | *p++ = txdr_unsigned(vap->va_uid); | |
174 | *p++ = txdr_unsigned(vap->va_gid); | |
175 | *p++ = txdr_unsigned(vap->va_size); | |
176 | *p++ = txdr_unsigned(vap->va_blocksize); | |
177 | *p++ = txdr_unsigned(vap->va_rdev); | |
178 | *p++ = txdr_unsigned(vap->va_bytes); | |
179 | *p++ = txdr_unsigned(vap->va_fsid); | |
180 | *p++ = txdr_unsigned(vap->va_fileid); | |
181 | txdr_time(&(vap->va_atime), p); | |
182 | p += 2; | |
183 | txdr_time(&(vap->va_mtime), p); | |
184 | p += 2; | |
185 | txdr_time(&(vap->va_ctime), p); | |
186 | nfsm_srvdone; | |
187 | } | |
188 | ||
189 | /* | |
190 | * nfs lookup rpc | |
191 | */ | |
192 | nfsrv_lookup(mrep, md, dpos, cred, xid, mrq) | |
193 | struct mbuf **mrq; | |
194 | struct mbuf *mrep, *md; | |
195 | caddr_t dpos; | |
196 | struct ucred *cred; | |
197 | u_long xid; | |
198 | { | |
199 | register struct nameidata *ndp = &u.u_nd; | |
200 | struct vnode *vp; | |
201 | nfsv2fh_t nfh; | |
202 | fhandle_t *fhp; | |
203 | nfsm_srvars; | |
204 | long len; | |
205 | struct vattr va, *vap = &va; | |
206 | ||
207 | fhp = &nfh.fh_generic; | |
208 | nfsm_srvmtofh(fhp); | |
209 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
210 | ndp->ni_cred = cred; | |
211 | ndp->ni_nameiop = LOOKUP | LOCKLEAF; | |
971b93e3 KM |
212 | if (error = nfs_namei(ndp, fhp, len, &md, &dpos)) |
213 | nfsm_reply(0); | |
214 | vp = ndp->ni_vp; | |
215 | bzero((caddr_t)fhp, sizeof(nfh)); | |
216 | fhp->fh_fsid = vp->v_mount->m_fsid; | |
217 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { | |
218 | vput(vp); | |
219 | nfsm_reply(0); | |
220 | } | |
221 | error = VOP_GETATTR(vp, vap, cred); | |
222 | vput(vp); | |
223 | nfsm_reply(NFSX_FH+NFSX_FATTR); | |
224 | nfsm_srvfhtom(fhp); | |
225 | nfsm_build(p, u_long *, NFSX_FATTR); | |
226 | *p++ = vtonfs_type(vap->va_type); | |
227 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
228 | *p++ = txdr_unsigned(vap->va_nlink); | |
229 | *p++ = txdr_unsigned(vap->va_uid); | |
230 | *p++ = txdr_unsigned(vap->va_gid); | |
231 | *p++ = txdr_unsigned(vap->va_size); | |
232 | *p++ = txdr_unsigned(vap->va_blocksize); | |
233 | *p++ = txdr_unsigned(vap->va_rdev); | |
234 | *p++ = txdr_unsigned(vap->va_bytes); | |
235 | *p++ = txdr_unsigned(vap->va_fsid); | |
236 | *p++ = txdr_unsigned(vap->va_fileid); | |
237 | txdr_time(&(vap->va_atime), p); | |
238 | p += 2; | |
239 | txdr_time(&(vap->va_mtime), p); | |
240 | p += 2; | |
241 | txdr_time(&(vap->va_ctime), p); | |
242 | nfsm_srvdone; | |
243 | } | |
244 | ||
245 | /* | |
246 | * nfs readlink service | |
247 | */ | |
248 | nfsrv_readlink(mrep, md, dpos, cred, xid, mrq) | |
249 | struct mbuf **mrq; | |
250 | struct mbuf *mrep, *md; | |
251 | caddr_t dpos; | |
252 | struct ucred *cred; | |
253 | long xid; | |
254 | { | |
255 | struct iovec iv[NFS_MAXPATHLEN/MLEN+1]; | |
256 | register struct iovec *ivp = iv; | |
257 | register struct mbuf *mp; | |
258 | nfsm_srvars; | |
259 | struct mbuf *mp2, *mp3; | |
260 | struct vnode *vp; | |
261 | nfsv2fh_t nfh; | |
262 | fhandle_t *fhp; | |
263 | struct uio io, *uiop = &io; | |
264 | int i, tlen, len; | |
265 | ||
266 | fhp = &nfh.fh_generic; | |
267 | nfsm_srvmtofh(fhp); | |
268 | len = 0; | |
269 | i = 0; | |
270 | while (len < NFS_MAXPATHLEN) { | |
271 | MGET(mp, M_WAIT, MT_DATA); | |
272 | NFSMCLGET(mp, M_WAIT); | |
273 | mp->m_len = NFSMSIZ(mp); | |
274 | if (len == 0) | |
275 | mp3 = mp2 = mp; | |
276 | else | |
277 | mp2->m_next = mp; | |
278 | if ((len+mp->m_len) > NFS_MAXPATHLEN) { | |
279 | mp->m_len = NFS_MAXPATHLEN-len; | |
280 | len = NFS_MAXPATHLEN; | |
281 | } else | |
282 | len += mp->m_len; | |
283 | ivp->iov_base = mtod(mp, caddr_t); | |
284 | ivp->iov_len = mp->m_len; | |
285 | i++; | |
286 | ivp++; | |
287 | } | |
288 | uiop->uio_iov = iv; | |
289 | uiop->uio_iovcnt = i; | |
290 | uiop->uio_offset = 0; | |
291 | uiop->uio_resid = len; | |
292 | uiop->uio_rw = UIO_READ; | |
293 | uiop->uio_segflg = UIO_SYSSPACE; | |
294 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) { | |
295 | m_freem(mp3); | |
296 | nfsm_reply(0); | |
297 | } | |
298 | if (vp->v_type != VLNK) { | |
299 | error = EINVAL; | |
300 | goto out; | |
301 | } | |
302 | error = VOP_READLINK(vp, uiop, cred); | |
303 | out: | |
304 | vput(vp); | |
305 | if (error) | |
306 | m_freem(mp3); | |
307 | nfsm_reply(NFSX_UNSIGNED); | |
308 | if (uiop->uio_resid > 0) { | |
309 | len -= uiop->uio_resid; | |
310 | tlen = nfsm_rndup(len); | |
311 | nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); | |
312 | } | |
313 | nfsm_build(p, u_long *, NFSX_UNSIGNED); | |
314 | *p = txdr_unsigned(len); | |
315 | mb->m_next = mp3; | |
316 | nfsm_srvdone; | |
317 | } | |
318 | ||
319 | /* | |
320 | * nfs read service | |
321 | */ | |
322 | nfsrv_read(mrep, md, dpos, cred, xid, mrq) | |
323 | struct mbuf **mrq; | |
324 | struct mbuf *mrep, *md; | |
325 | caddr_t dpos; | |
326 | struct ucred *cred; | |
327 | u_long xid; | |
328 | { | |
329 | struct iovec iv[NFS_MAXDATA/MCLBYTES+1]; | |
330 | register struct iovec *ivp = iv; | |
331 | register struct mbuf *mp; | |
332 | nfsm_srvars; | |
333 | struct mbuf *mp2, *mp3; | |
334 | struct vnode *vp; | |
335 | nfsv2fh_t nfh; | |
336 | fhandle_t *fhp; | |
337 | struct uio io, *uiop = &io; | |
338 | struct vattr va, *vap = &va; | |
339 | int i, tlen, cnt, len, nio, left; | |
340 | off_t off; | |
341 | ||
342 | fhp = &nfh.fh_generic; | |
343 | nfsm_srvmtofh(fhp); | |
344 | nfsm_disect(p, u_long *, NFSX_UNSIGNED); | |
345 | off = fxdr_unsigned(off_t, *p); | |
346 | nfsm_srvstrsiz(cnt, NFS_MAXDATA); | |
347 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) | |
348 | nfsm_reply(0); | |
24ed1a73 | 349 | if (error = nfsrv_access(vp, VREAD | VEXEC, cred)) { |
971b93e3 KM |
350 | vput(vp); |
351 | nfsm_reply(0); | |
352 | } | |
353 | len = left = cnt; | |
354 | nio = (cnt+MCLBYTES-1)/MCLBYTES; | |
355 | uiop->uio_iov = ivp; | |
356 | uiop->uio_iovcnt = nio; | |
357 | uiop->uio_offset = off; | |
358 | uiop->uio_resid = cnt; | |
359 | uiop->uio_rw = UIO_READ; | |
360 | uiop->uio_segflg = UIO_SYSSPACE; | |
361 | for (i = 0; i < nio; i++) { | |
362 | MGET(mp, M_WAIT, MT_DATA); | |
363 | if (left > MLEN) | |
364 | NFSMCLGET(mp, M_WAIT); | |
365 | mp->m_len = (M_HASCL(mp)) ? MCLBYTES : MLEN; | |
366 | if (i == 0) { | |
367 | mp3 = mp2 = mp; | |
368 | } else { | |
369 | mp2->m_next = mp; | |
370 | mp2 = mp; | |
371 | } | |
372 | if (left > MLEN && !M_HASCL(mp)) { | |
373 | m_freem(mp3); | |
374 | vput(vp); | |
375 | nfsm_srverr; | |
376 | } | |
377 | ivp->iov_base = mtod(mp, caddr_t); | |
378 | if (left > mp->m_len) { | |
379 | ivp->iov_len = mp->m_len; | |
380 | left -= mp->m_len; | |
381 | } else { | |
382 | ivp->iov_len = mp->m_len = left; | |
383 | left = 0; | |
384 | } | |
385 | ivp++; | |
386 | } | |
387 | error = VOP_READ(vp, uiop, &off, IO_NODELOCKED, cred); | |
388 | if (error) { | |
389 | m_freem(mp3); | |
390 | vput(vp); | |
391 | nfsm_reply(0); | |
392 | } | |
393 | if (error = VOP_GETATTR(vp, vap, cred)) | |
394 | m_freem(mp3); | |
395 | vput(vp); | |
396 | nfsm_reply(NFSX_FATTR+NFSX_UNSIGNED); | |
397 | nfsm_build(p, u_long *, NFSX_FATTR+NFSX_UNSIGNED); | |
398 | *p++ = vtonfs_type(vap->va_type); | |
399 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
400 | *p++ = txdr_unsigned(vap->va_nlink); | |
401 | *p++ = txdr_unsigned(vap->va_uid); | |
402 | *p++ = txdr_unsigned(vap->va_gid); | |
403 | *p++ = txdr_unsigned(vap->va_size); | |
404 | *p++ = txdr_unsigned(vap->va_blocksize); | |
405 | *p++ = txdr_unsigned(vap->va_rdev); | |
406 | *p++ = txdr_unsigned(vap->va_bytes); | |
407 | *p++ = txdr_unsigned(vap->va_fsid); | |
408 | *p++ = txdr_unsigned(vap->va_fileid); | |
409 | txdr_time(&(vap->va_atime), p); | |
410 | p += 2; | |
411 | txdr_time(&(vap->va_mtime), p); | |
412 | p += 2; | |
413 | txdr_time(&(vap->va_ctime), p); | |
414 | p += 2; | |
415 | if (uiop->uio_resid > 0) { | |
416 | len -= uiop->uio_resid; | |
417 | if (len > 0) { | |
418 | tlen = nfsm_rndup(len); | |
419 | nfsm_adj(mp3, cnt-tlen, tlen-len); | |
420 | } else { | |
421 | m_freem(mp3); | |
422 | mp3 = (struct mbuf *)0; | |
423 | } | |
424 | } | |
425 | *p = txdr_unsigned(len); | |
426 | mb->m_next = mp3; | |
427 | nfsm_srvdone; | |
428 | } | |
429 | ||
430 | /* | |
431 | * nfs write service | |
432 | */ | |
433 | nfsrv_write(mrep, md, dpos, cred, xid, mrq) | |
434 | struct mbuf *mrep, *md, **mrq; | |
435 | caddr_t dpos; | |
436 | struct ucred *cred; | |
437 | long xid; | |
438 | { | |
439 | register struct iovec *ivp; | |
440 | register struct mbuf *mp; | |
441 | struct iovec iv[MAX_IOVEC]; | |
442 | struct vattr va; | |
443 | register struct vattr *vap = &va; | |
444 | nfsm_srvars; | |
445 | struct vnode *vp; | |
446 | nfsv2fh_t nfh; | |
447 | fhandle_t *fhp; | |
448 | struct uio io, *uiop = &io; | |
449 | off_t off; | |
450 | long siz, len, xfer; | |
451 | ||
452 | fhp = &nfh.fh_generic; | |
453 | nfsm_srvmtofh(fhp); | |
454 | nfsm_disect(p, u_long *, 4*NFSX_UNSIGNED); | |
455 | off = fxdr_unsigned(off_t, *++p); | |
456 | p += 2; | |
457 | len = fxdr_unsigned(long, *p); | |
458 | if (len > NFS_MAXDATA || len <= 0) { | |
459 | error = EBADRPC; | |
460 | nfsm_reply(0); | |
461 | } | |
462 | if (dpos == (mtod(md, caddr_t)+md->m_len)) { | |
463 | mp = md->m_next; | |
464 | if (mp == NULL) { | |
465 | error = EBADRPC; | |
466 | nfsm_reply(0); | |
467 | } | |
468 | } else { | |
469 | mp = md; | |
470 | siz = dpos-mtod(mp, caddr_t); | |
471 | mp->m_len -= siz; | |
472 | NFSMADV(mp, siz); | |
473 | } | |
474 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) | |
475 | nfsm_reply(0); | |
24ed1a73 | 476 | if (error = nfsrv_access(vp, VWRITE, cred)) { |
971b93e3 KM |
477 | vput(vp); |
478 | nfsm_reply(0); | |
479 | } | |
480 | uiop->uio_resid = 0; | |
481 | uiop->uio_rw = UIO_WRITE; | |
482 | uiop->uio_segflg = UIO_SYSSPACE; | |
483 | /* | |
484 | * Do up to MAX_IOVEC mbufs of write each iteration of the | |
485 | * loop until done. | |
486 | */ | |
487 | while (len > 0 && uiop->uio_resid == 0) { | |
488 | ivp = iv; | |
489 | siz = 0; | |
490 | uiop->uio_iov = ivp; | |
491 | uiop->uio_iovcnt = 0; | |
492 | uiop->uio_offset = off; | |
493 | while (len > 0 && uiop->uio_iovcnt < MAX_IOVEC && mp != NULL) { | |
494 | ivp->iov_base = mtod(mp, caddr_t); | |
495 | if (len < mp->m_len) | |
496 | ivp->iov_len = xfer = len; | |
497 | else | |
498 | ivp->iov_len = xfer = mp->m_len; | |
499 | #ifdef notdef | |
500 | /* Not Yet .. */ | |
501 | if (M_HASCL(mp) && (((u_long)ivp->iov_base) & CLOFSET) == 0) | |
502 | ivp->iov_op = NULL; /* what should it be ?? */ | |
503 | else | |
504 | ivp->iov_op = NULL; | |
505 | #endif | |
506 | uiop->uio_iovcnt++; | |
507 | ivp++; | |
508 | len -= xfer; | |
509 | siz += xfer; | |
510 | mp = mp->m_next; | |
511 | } | |
512 | if (len > 0 && mp == NULL) { | |
513 | error = EBADRPC; | |
514 | vput(vp); | |
515 | nfsm_reply(0); | |
516 | } | |
517 | uiop->uio_resid = siz; | |
518 | if (error = VOP_WRITE(vp, uiop, &off, IO_SYNC | IO_NODELOCKED, | |
519 | cred)) { | |
520 | vput(vp); | |
521 | nfsm_reply(0); | |
522 | } | |
523 | } | |
524 | error = VOP_GETATTR(vp, vap, cred); | |
525 | vput(vp); | |
526 | nfsm_reply(NFSX_FATTR); | |
527 | nfsm_build(p, u_long *, NFSX_FATTR); | |
528 | *p++ = vtonfs_type(vap->va_type); | |
529 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
530 | *p++ = txdr_unsigned(vap->va_nlink); | |
531 | *p++ = txdr_unsigned(vap->va_uid); | |
532 | *p++ = txdr_unsigned(vap->va_gid); | |
533 | *p++ = txdr_unsigned(vap->va_size); | |
534 | *p++ = txdr_unsigned(vap->va_blocksize); | |
535 | *p++ = txdr_unsigned(vap->va_rdev); | |
536 | *p++ = txdr_unsigned(vap->va_bytes); | |
537 | *p++ = txdr_unsigned(vap->va_fsid); | |
538 | *p++ = txdr_unsigned(vap->va_fileid); | |
539 | txdr_time(&(vap->va_atime), p); | |
540 | p += 2; | |
541 | txdr_time(&(vap->va_mtime), p); | |
542 | p += 2; | |
543 | txdr_time(&(vap->va_ctime), p); | |
544 | nfsm_srvdone; | |
545 | } | |
546 | ||
547 | /* | |
548 | * nfs create service | |
549 | * now does a truncate to 0 length via. setattr if it already exists | |
550 | */ | |
551 | nfsrv_create(mrep, md, dpos, cred, xid, mrq) | |
552 | struct mbuf *mrep, *md, **mrq; | |
553 | caddr_t dpos; | |
554 | struct ucred *cred; | |
555 | long xid; | |
556 | { | |
557 | struct vattr va; | |
558 | register struct vattr *vap = &va; | |
559 | register struct nameidata *ndp = &u.u_nd; | |
560 | nfsm_srvars; | |
561 | struct vnode *vp; | |
562 | nfsv2fh_t nfh; | |
563 | fhandle_t *fhp; | |
564 | long len; | |
565 | ||
566 | ndp->ni_vp = ndp->ni_dvp = (struct vnode *)0; | |
567 | fhp = &nfh.fh_generic; | |
568 | nfsm_srvmtofh(fhp); | |
569 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
570 | ndp->ni_cred = cred; | |
571 | ndp->ni_nameiop = CREATE | LOCKPARENT | LOCKLEAF; | |
971b93e3 KM |
572 | if (error = nfs_namei(ndp, fhp, len, &md, &dpos)) |
573 | nfsm_reply(0); | |
574 | vattr_null(vap); | |
575 | nfsm_disect(p, u_long *, NFSX_UNSIGNED); | |
576 | /* | |
577 | * Iff doesn't exist, create it | |
578 | * otherwise just truncate to 0 length | |
579 | * should I set the mode too ?? | |
580 | */ | |
581 | if (ndp->ni_vp == NULL) { | |
582 | vap->va_type = VREG; | |
583 | vap->va_mode = nfstov_mode(*p++); | |
584 | if (error = VOP_CREATE(ndp, vap)) | |
585 | nfsm_reply(0); | |
36c3043b | 586 | vp = ndp->ni_vp; |
971b93e3 | 587 | } else { |
36c3043b KM |
588 | vp = ndp->ni_vp; |
589 | ndp->ni_vp = (struct vnode *)0; | |
590 | VOP_ABORTOP(ndp); | |
971b93e3 | 591 | vap->va_size = 0; |
36c3043b | 592 | if (error = VOP_SETATTR(vp, vap, cred)) |
971b93e3 | 593 | nfsm_reply(0); |
971b93e3 | 594 | } |
971b93e3 KM |
595 | bzero((caddr_t)fhp, sizeof(nfh)); |
596 | fhp->fh_fsid = vp->v_mount->m_fsid; | |
597 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { | |
598 | vput(vp); | |
599 | nfsm_reply(0); | |
600 | } | |
601 | error = VOP_GETATTR(vp, vap, cred); | |
602 | vput(vp); | |
603 | nfsm_reply(NFSX_FH+NFSX_FATTR); | |
604 | nfsm_srvfhtom(fhp); | |
605 | nfsm_build(p, u_long *, NFSX_FATTR); | |
606 | *p++ = vtonfs_type(vap->va_type); | |
607 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
608 | *p++ = txdr_unsigned(vap->va_nlink); | |
609 | *p++ = txdr_unsigned(vap->va_uid); | |
610 | *p++ = txdr_unsigned(vap->va_gid); | |
611 | *p++ = txdr_unsigned(vap->va_size); | |
612 | *p++ = txdr_unsigned(vap->va_blocksize); | |
613 | *p++ = txdr_unsigned(vap->va_rdev); | |
614 | *p++ = txdr_unsigned(vap->va_bytes); | |
615 | *p++ = txdr_unsigned(vap->va_fsid); | |
616 | *p++ = txdr_unsigned(vap->va_fileid); | |
617 | txdr_time(&(vap->va_atime), p); | |
618 | p += 2; | |
619 | txdr_time(&(vap->va_mtime), p); | |
620 | p += 2; | |
621 | txdr_time(&(vap->va_ctime), p); | |
622 | return (error); | |
623 | nfsmout: | |
624 | VOP_ABORTOP(ndp); | |
625 | return (error); | |
626 | } | |
627 | ||
628 | /* | |
629 | * nfs remove service | |
630 | */ | |
631 | nfsrv_remove(mrep, md, dpos, cred, xid, mrq) | |
632 | struct mbuf *mrep, *md, **mrq; | |
633 | caddr_t dpos; | |
634 | struct ucred *cred; | |
635 | long xid; | |
636 | { | |
637 | register struct nameidata *ndp = &u.u_nd; | |
638 | nfsm_srvars; | |
639 | struct vnode *vp; | |
640 | nfsv2fh_t nfh; | |
641 | fhandle_t *fhp; | |
642 | long len; | |
643 | ||
644 | fhp = &nfh.fh_generic; | |
645 | nfsm_srvmtofh(fhp); | |
646 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
647 | ndp->ni_cred = cred; | |
648 | ndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; | |
971b93e3 KM |
649 | if (error = nfs_namei(ndp, fhp, len, &md, &dpos)) |
650 | nfsm_reply(0); | |
651 | vp = ndp->ni_vp; | |
652 | if (vp->v_type == VDIR && | |
653 | (error = suser(cred, (short *)0))) | |
654 | goto out; | |
655 | /* | |
656 | * Don't unlink a mounted file. | |
657 | */ | |
658 | if (vp->v_flag & VROOT) { | |
659 | error = EBUSY; | |
660 | goto out; | |
661 | } | |
662 | if (vp->v_flag & VTEXT) | |
663 | xrele(vp); /* try once to free text */ | |
664 | out: | |
665 | if (error) | |
666 | VOP_ABORTOP(ndp); | |
667 | else | |
668 | error = VOP_REMOVE(ndp); | |
669 | nfsm_reply(0); | |
670 | nfsm_srvdone; | |
671 | } | |
672 | ||
673 | /* | |
674 | * nfs rename service | |
971b93e3 KM |
675 | */ |
676 | nfsrv_rename(mrep, md, dpos, cred, xid, mrq) | |
677 | struct mbuf *mrep, *md, **mrq; | |
678 | caddr_t dpos; | |
679 | struct ucred *cred; | |
680 | long xid; | |
681 | { | |
36c3043b | 682 | register struct nameidata *ndp; |
971b93e3 | 683 | nfsm_srvars; |
36c3043b | 684 | struct nameidata tond; |
971b93e3 KM |
685 | struct vnode *fvp, *tvp, *tdvp; |
686 | nfsv2fh_t fnfh, tnfh; | |
687 | fhandle_t *ffhp, *tfhp; | |
688 | long len, len2; | |
689 | int rootflg = 0; | |
690 | ||
36c3043b KM |
691 | ndp = &u.u_nd; |
692 | ndp->ni_vp = ndp->ni_dvp = (struct vnode *)0; | |
971b93e3 KM |
693 | ffhp = &fnfh.fh_generic; |
694 | tfhp = &tnfh.fh_generic; | |
695 | nfsm_srvmtofh(ffhp); | |
696 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
697 | /* | |
698 | * Remember if we are root so that we can reset cr_uid before | |
699 | * the second nfs_namei() call | |
700 | */ | |
701 | if (cred->cr_uid == 0) | |
702 | rootflg++; | |
36c3043b KM |
703 | ndp->ni_cred = cred; |
704 | ndp->ni_nameiop = DELETE | WANTPARENT; | |
705 | if (error = nfs_namei(ndp, ffhp, len, &md, &dpos)) | |
971b93e3 | 706 | nfsm_reply(0); |
36c3043b | 707 | fvp = ndp->ni_vp; |
971b93e3 KM |
708 | nfsm_srvmtofh(tfhp); |
709 | nfsm_srvstrsiz(len2, NFS_MAXNAMLEN); | |
710 | if (rootflg) | |
711 | cred->cr_uid = 0; | |
36c3043b KM |
712 | nddup(ndp, &tond); |
713 | tond.ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE; | |
714 | error = nfs_namei(&tond, tfhp, len2, &md, &dpos); | |
715 | tdvp = tond.ni_dvp; | |
716 | tvp = tond.ni_vp; | |
971b93e3 KM |
717 | if (tvp != NULL) { |
718 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { | |
719 | error = EISDIR; | |
720 | goto out; | |
721 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { | |
722 | error = ENOTDIR; | |
723 | goto out; | |
724 | } | |
725 | } | |
726 | if (error) { | |
36c3043b | 727 | VOP_ABORTOP(ndp); |
971b93e3 KM |
728 | goto out1; |
729 | } | |
730 | if (fvp->v_mount != tdvp->v_mount) { | |
731 | error = EXDEV; | |
732 | goto out; | |
733 | } | |
734 | if (fvp == tdvp || fvp == tvp) | |
735 | error = EINVAL; | |
736 | out: | |
737 | if (error) { | |
36c3043b KM |
738 | VOP_ABORTOP(&tond); |
739 | VOP_ABORTOP(ndp); | |
971b93e3 | 740 | } else { |
107d27c5 | 741 | VREF(tond.ni_cdir); |
36c3043b | 742 | error = VOP_RENAME(ndp, &tond); |
107d27c5 | 743 | vrele(tond.ni_cdir); |
971b93e3 KM |
744 | } |
745 | out1: | |
107d27c5 | 746 | ndrele(ndp); |
971b93e3 KM |
747 | nfsm_reply(0); |
748 | return (error); | |
749 | nfsmout: | |
36c3043b | 750 | VOP_ABORTOP(ndp); |
971b93e3 KM |
751 | return (error); |
752 | } | |
753 | ||
754 | /* | |
755 | * nfs link service | |
756 | */ | |
757 | nfsrv_link(mrep, md, dpos, cred, xid, mrq) | |
758 | struct mbuf *mrep, *md, **mrq; | |
759 | caddr_t dpos; | |
760 | struct ucred *cred; | |
761 | long xid; | |
762 | { | |
763 | register struct nameidata *ndp = &u.u_nd; | |
764 | nfsm_srvars; | |
765 | struct vnode *vp, *xp; | |
766 | nfsv2fh_t nfh, dnfh; | |
767 | fhandle_t *fhp, *dfhp; | |
768 | long len; | |
769 | ||
770 | fhp = &nfh.fh_generic; | |
771 | dfhp = &dnfh.fh_generic; | |
772 | nfsm_srvmtofh(fhp); | |
773 | nfsm_srvmtofh(dfhp); | |
774 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
775 | if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred)) | |
776 | nfsm_reply(0); | |
777 | if (vp->v_type == VDIR && (error = suser(cred, NULL))) | |
778 | goto out1; | |
779 | ndp->ni_cred = cred; | |
780 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
971b93e3 KM |
781 | if (error = nfs_namei(ndp, dfhp, len, &md, &dpos)) |
782 | goto out1; | |
783 | xp = ndp->ni_vp; | |
784 | if (xp != NULL) { | |
785 | error = EEXIST; | |
786 | goto out; | |
787 | } | |
788 | xp = ndp->ni_dvp; | |
789 | if (vp->v_mount != xp->v_mount) | |
790 | error = EXDEV; | |
791 | out: | |
792 | if (error) | |
793 | VOP_ABORTOP(ndp); | |
794 | else | |
795 | error = VOP_LINK(vp, ndp); | |
796 | out1: | |
797 | vrele(vp); | |
798 | nfsm_reply(0); | |
799 | nfsm_srvdone; | |
800 | } | |
801 | ||
802 | /* | |
803 | * nfs symbolic link service | |
804 | */ | |
805 | nfsrv_symlink(mrep, md, dpos, cred, xid, mrq) | |
806 | struct mbuf *mrep, *md, **mrq; | |
807 | caddr_t dpos; | |
808 | struct ucred *cred; | |
809 | long xid; | |
810 | { | |
811 | struct vattr va; | |
812 | register struct nameidata *ndp = &u.u_nd; | |
813 | register struct vattr *vap = &va; | |
814 | nfsm_srvars; | |
815 | struct vnode *vp; | |
816 | nfsv2fh_t nfh; | |
817 | fhandle_t *fhp; | |
818 | long len, tlen, len2; | |
819 | ||
820 | ndp->ni_vp = ndp->ni_dvp = (struct vnode *)0; | |
821 | fhp = &nfh.fh_generic; | |
822 | nfsm_srvmtofh(fhp); | |
823 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
824 | ndp->ni_cred = cred; | |
825 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
971b93e3 KM |
826 | if (error = nfs_namei(ndp, fhp, len, &md, &dpos)) |
827 | goto out1; | |
828 | nfsm_srvstrsiz(len2, NFS_MAXPATHLEN); | |
829 | tlen = nfsm_rndup(len2); | |
830 | if (len2 == tlen) { | |
831 | nfsm_disect(cp2, caddr_t, tlen+NFSX_UNSIGNED); | |
832 | *(cp2+tlen) = '\0'; | |
833 | } else { | |
834 | nfsm_disect(cp2, caddr_t, tlen); | |
835 | } | |
836 | vp = ndp->ni_vp; | |
837 | if (vp) { | |
838 | error = EEXIST; | |
839 | goto out; | |
840 | } | |
841 | vp = ndp->ni_dvp; | |
842 | vattr_null(vap); | |
843 | vap->va_mode = 0777; | |
844 | out: | |
845 | if (error) | |
846 | VOP_ABORTOP(ndp); | |
847 | else | |
848 | error = VOP_SYMLINK(ndp, vap, cp2); | |
849 | out1: | |
850 | nfsm_reply(0); | |
851 | return (error); | |
852 | nfsmout: | |
853 | VOP_ABORTOP(ndp); | |
854 | return (error); | |
855 | } | |
856 | ||
857 | /* | |
858 | * nfs mkdir service | |
859 | */ | |
860 | nfsrv_mkdir(mrep, md, dpos, cred, xid, mrq) | |
861 | struct mbuf *mrep, *md, **mrq; | |
862 | caddr_t dpos; | |
863 | struct ucred *cred; | |
864 | long xid; | |
865 | { | |
866 | struct vattr va; | |
867 | register struct vattr *vap = &va; | |
868 | register struct nameidata *ndp = &u.u_nd; | |
869 | nfsm_srvars; | |
870 | struct vnode *vp; | |
871 | nfsv2fh_t nfh; | |
872 | fhandle_t *fhp; | |
873 | long len; | |
874 | ||
875 | ndp->ni_vp = ndp->ni_dvp = (struct vnode *)0; | |
876 | fhp = &nfh.fh_generic; | |
877 | nfsm_srvmtofh(fhp); | |
878 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
879 | ndp->ni_cred = cred; | |
880 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
971b93e3 KM |
881 | if (error = nfs_namei(ndp, fhp, len, &md, &dpos)) |
882 | nfsm_reply(0); | |
883 | nfsm_disect(p, u_long *, NFSX_UNSIGNED); | |
884 | vattr_null(vap); | |
885 | vap->va_type = VDIR; | |
886 | vap->va_mode = nfstov_mode(*p++); | |
887 | vp = ndp->ni_vp; | |
888 | if (vp != NULL) { | |
889 | VOP_ABORTOP(ndp); | |
890 | error = EEXIST; | |
891 | nfsm_reply(0); | |
892 | } | |
893 | if (error = VOP_MKDIR(ndp, vap)) | |
894 | nfsm_reply(0); | |
895 | vp = ndp->ni_vp; | |
896 | bzero((caddr_t)fhp, sizeof(nfh)); | |
897 | fhp->fh_fsid = vp->v_mount->m_fsid; | |
898 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { | |
899 | vput(vp); | |
900 | nfsm_reply(0); | |
901 | } | |
902 | error = VOP_GETATTR(vp, vap, cred); | |
903 | vput(vp); | |
904 | nfsm_reply(NFSX_FH+NFSX_FATTR); | |
905 | nfsm_srvfhtom(fhp); | |
906 | nfsm_build(p, u_long *, NFSX_FATTR); | |
907 | *p++ = vtonfs_type(vap->va_type); | |
908 | *p++ = vtonfs_mode(vap->va_type, vap->va_mode); | |
909 | *p++ = txdr_unsigned(vap->va_nlink); | |
910 | *p++ = txdr_unsigned(vap->va_uid); | |
911 | *p++ = txdr_unsigned(vap->va_gid); | |
912 | *p++ = txdr_unsigned(vap->va_size); | |
913 | *p++ = txdr_unsigned(vap->va_blocksize); | |
914 | *p++ = txdr_unsigned(vap->va_rdev); | |
915 | *p++ = txdr_unsigned(vap->va_bytes); | |
916 | *p++ = txdr_unsigned(vap->va_fsid); | |
917 | *p++ = txdr_unsigned(vap->va_fileid); | |
918 | txdr_time(&(vap->va_atime), p); | |
919 | p += 2; | |
920 | txdr_time(&(vap->va_mtime), p); | |
921 | p += 2; | |
922 | txdr_time(&(vap->va_ctime), p); | |
923 | return (error); | |
924 | nfsmout: | |
925 | VOP_ABORTOP(ndp); | |
926 | return (error); | |
927 | } | |
928 | ||
929 | /* | |
930 | * nfs rmdir service | |
931 | */ | |
932 | nfsrv_rmdir(mrep, md, dpos, cred, xid, mrq) | |
933 | struct mbuf *mrep, *md, **mrq; | |
934 | caddr_t dpos; | |
935 | struct ucred *cred; | |
936 | long xid; | |
937 | { | |
938 | register struct nameidata *ndp = &u.u_nd; | |
939 | nfsm_srvars; | |
940 | struct vnode *vp; | |
941 | nfsv2fh_t nfh; | |
942 | fhandle_t *fhp; | |
943 | long len; | |
944 | ||
945 | fhp = &nfh.fh_generic; | |
946 | nfsm_srvmtofh(fhp); | |
947 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); | |
948 | ndp->ni_cred = cred; | |
949 | ndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; | |
971b93e3 KM |
950 | if (error = nfs_namei(ndp, fhp, len, &md, &dpos)) |
951 | nfsm_reply(0); | |
952 | vp = ndp->ni_vp; | |
953 | if (vp->v_type != VDIR) { | |
954 | error = ENOTDIR; | |
955 | goto out; | |
956 | } | |
957 | /* | |
958 | * No rmdir "." please. | |
959 | */ | |
960 | if (ndp->ni_dvp == vp) { | |
961 | error = EINVAL; | |
962 | goto out; | |
963 | } | |
964 | /* | |
965 | * Don't unlink a mounted file. | |
966 | */ | |
967 | if (vp->v_flag & VROOT) | |
968 | error = EBUSY; | |
969 | out: | |
970 | if (error) | |
971 | VOP_ABORTOP(ndp); | |
972 | else | |
973 | error = VOP_RMDIR(ndp); | |
974 | nfsm_reply(0); | |
975 | nfsm_srvdone; | |
976 | } | |
977 | ||
978 | /* | |
979 | * nfs readdir service | |
980 | * - mallocs what it thinks is enough to read | |
36c3043b | 981 | * count rounded up to a multiple of DIRBLKSIZ <= MAX_READDIR |
971b93e3 KM |
982 | * - calls VOP_READDIR() |
983 | * - loops arround building the reply | |
36c3043b KM |
984 | * if the output generated exceeds count break out of loop |
985 | * The nfsm_clget macro is used here so that the reply will be packed | |
986 | * tightly in mbuf clusters. | |
971b93e3 | 987 | * - it only knows that it has encountered eof when the VOP_READDIR() |
36c3043b | 988 | * reads nothing |
971b93e3 | 989 | * - as such one readdir rpc will return eof false although you are there |
36c3043b | 990 | * and then the next will return eof |
971b93e3 | 991 | * - it trims out records with d_ino == 0 |
36c3043b KM |
992 | * this doesn't matter for Unix clients, but they might confuse clients |
993 | * for other os'. | |
971b93e3 | 994 | * NB: It is tempting to set eof to true if the VOP_READDIR() reads less |
36c3043b KM |
995 | * than requested, but this may not apply to all filesystems. For |
996 | * example, client NFS does not { although it is never remote mounted | |
997 | * anyhow } | |
971b93e3 | 998 | * PS: The NFS protocol spec. does not clarify what the "count" byte |
36c3043b KM |
999 | * argument is a count of.. just name strings and file id's or the |
1000 | * entire reply rpc or ... | |
1001 | * I tried just file name and id sizes and it confused the Sun client, | |
1002 | * so I am using the full rpc size now. The "paranoia.." comment refers | |
1003 | * to including the status longwords that are not a part of the dir. | |
1004 | * "entry" structures, but are in the rpc. | |
971b93e3 KM |
1005 | */ |
1006 | nfsrv_readdir(mrep, md, dpos, cred, xid, mrq) | |
1007 | struct mbuf **mrq; | |
1008 | struct mbuf *mrep, *md; | |
1009 | caddr_t dpos; | |
1010 | struct ucred *cred; | |
1011 | u_long xid; | |
1012 | { | |
1013 | register char *bp, *be; | |
1014 | register struct mbuf *mp; | |
1015 | register struct direct *dp; | |
1016 | nfsm_srvars; | |
1017 | char *cpos, *cend; | |
1018 | int len, nlen, rem, xfer, tsiz, i; | |
1019 | struct vnode *vp; | |
1020 | struct mbuf *mp2, *mp3; | |
1021 | nfsv2fh_t nfh; | |
1022 | fhandle_t *fhp; | |
1023 | struct uio io; | |
1024 | struct iovec iv; | |
1025 | int siz, cnt, fullsiz; | |
1026 | u_long on; | |
1027 | char *rbuf; | |
1028 | off_t off, toff; | |
1029 | ||
1030 | fhp = &nfh.fh_generic; | |
1031 | nfsm_srvmtofh(fhp); | |
1032 | nfsm_disect(p, u_long *, 2*NFSX_UNSIGNED); | |
1033 | toff = fxdr_unsigned(off_t, *p++); | |
1034 | off = (toff & ~(DIRBLKSIZ-1)); | |
1035 | on = (toff & (DIRBLKSIZ-1)); | |
1036 | cnt = fxdr_unsigned(int, *p); | |
1037 | siz = ((cnt+DIRBLKSIZ) & ~(DIRBLKSIZ-1)); | |
1038 | if (cnt > MAX_READDIR) | |
1039 | siz = MAX_READDIR; | |
1040 | fullsiz = siz; | |
1041 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) | |
1042 | nfsm_reply(0); | |
24ed1a73 | 1043 | if (error = nfsrv_access(vp, VEXEC, cred)) { |
971b93e3 KM |
1044 | vput(vp); |
1045 | nfsm_reply(0); | |
1046 | } | |
1047 | VOP_UNLOCK(vp); | |
1048 | MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); | |
1049 | again: | |
1050 | iv.iov_base = rbuf; | |
1051 | iv.iov_len = fullsiz; | |
1052 | io.uio_iov = &iv; | |
1053 | io.uio_iovcnt = 1; | |
1054 | io.uio_offset = off; | |
1055 | io.uio_resid = fullsiz; | |
1056 | io.uio_segflg = UIO_SYSSPACE; | |
1057 | io.uio_rw = UIO_READ; | |
1058 | error = VOP_READDIR(vp, &io, &off, cred); | |
1059 | if (error) { | |
1060 | vrele(vp); | |
1061 | free((caddr_t)rbuf, M_TEMP); | |
1062 | nfsm_reply(0); | |
1063 | } | |
1064 | if (io.uio_resid) { | |
1065 | siz -= io.uio_resid; | |
1066 | ||
1067 | /* | |
1068 | * If nothing read, return eof | |
1069 | * rpc reply | |
1070 | */ | |
1071 | if (siz == 0) { | |
1072 | vrele(vp); | |
1073 | nfsm_reply(2*NFSX_UNSIGNED); | |
1074 | nfsm_build(p, u_long *, 2*NFSX_UNSIGNED); | |
1075 | *p++ = nfs_false; | |
1076 | *p = nfs_true; | |
1077 | FREE((caddr_t)rbuf, M_TEMP); | |
1078 | return (0); | |
1079 | } | |
1080 | } | |
1081 | cpos = rbuf+on; | |
1082 | cend = rbuf+siz; | |
1083 | dp = (struct direct *)cpos; | |
1084 | /* | |
1085 | * Check for degenerate cases of nothing useful read. | |
1086 | * If so go try again | |
1087 | */ | |
1088 | if (cpos >= cend || (dp->d_ino == 0 && (cpos+dp->d_reclen) >= cend)) { | |
1089 | toff = off; | |
1090 | siz = fullsiz; | |
1091 | on = 0; | |
1092 | goto again; | |
1093 | } | |
1094 | vrele(vp); | |
36c3043b | 1095 | len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */ |
971b93e3 KM |
1096 | bp = be = (caddr_t)0; |
1097 | mp3 = (struct mbuf *)0; | |
1098 | nfsm_reply(siz); | |
1099 | ||
1100 | /* Loop through the records and build reply */ | |
1101 | while (cpos < cend) { | |
1102 | if (dp->d_ino != 0) { | |
1103 | nlen = dp->d_namlen; | |
1104 | rem = nfsm_rndup(nlen)-nlen; | |
36c3043b | 1105 | |
971b93e3 KM |
1106 | /* |
1107 | * As noted above, the NFS spec. is not clear about what | |
1108 | * should be included in "count" as totalled up here in | |
1109 | * "len". | |
1110 | */ | |
1111 | len += (4*NFSX_UNSIGNED+nlen+rem); | |
1112 | if (len > cnt) | |
1113 | break; | |
36c3043b | 1114 | |
971b93e3 KM |
1115 | /* Build the directory record xdr from the direct entry */ |
1116 | nfsm_clget; | |
1117 | *p = nfs_true; | |
1118 | bp += NFSX_UNSIGNED; | |
1119 | nfsm_clget; | |
1120 | *p = txdr_unsigned(dp->d_ino); | |
1121 | bp += NFSX_UNSIGNED; | |
1122 | nfsm_clget; | |
1123 | *p = txdr_unsigned(nlen); | |
1124 | bp += NFSX_UNSIGNED; | |
36c3043b | 1125 | |
971b93e3 KM |
1126 | /* And loop arround copying the name */ |
1127 | xfer = nlen; | |
1128 | cp = dp->d_name; | |
1129 | while (xfer > 0) { | |
1130 | nfsm_clget; | |
1131 | if ((bp+xfer) > be) | |
1132 | tsiz = be-bp; | |
1133 | else | |
1134 | tsiz = xfer; | |
1135 | bcopy(cp, bp, tsiz); | |
1136 | bp += tsiz; | |
1137 | xfer -= tsiz; | |
1138 | if (xfer > 0) | |
1139 | cp += tsiz; | |
1140 | } | |
1141 | /* And null pad to a long boundary */ | |
1142 | for (i = 0; i < rem; i++) | |
1143 | *bp++ = '\0'; | |
1144 | nfsm_clget; | |
36c3043b | 1145 | |
971b93e3 KM |
1146 | /* Finish off the record */ |
1147 | toff += dp->d_reclen; | |
1148 | *p = txdr_unsigned(toff); | |
1149 | bp += NFSX_UNSIGNED; | |
1150 | } else | |
1151 | toff += dp->d_reclen; | |
1152 | cpos += dp->d_reclen; | |
1153 | dp = (struct direct *)cpos; | |
1154 | } | |
1155 | nfsm_clget; | |
1156 | *p = nfs_false; | |
1157 | bp += NFSX_UNSIGNED; | |
1158 | nfsm_clget; | |
1159 | *p = nfs_false; | |
1160 | bp += NFSX_UNSIGNED; | |
1161 | if (bp < be) | |
1162 | mp->m_len = bp-mtod(mp, caddr_t); | |
1163 | mb->m_next = mp3; | |
1164 | FREE(rbuf, M_TEMP); | |
1165 | nfsm_srvdone; | |
1166 | } | |
1167 | ||
1168 | /* | |
1169 | * nfs statfs service | |
1170 | */ | |
1171 | nfsrv_statfs(mrep, md, dpos, cred, xid, mrq) | |
1172 | struct mbuf **mrq; | |
1173 | struct mbuf *mrep, *md; | |
1174 | caddr_t dpos; | |
1175 | struct ucred *cred; | |
1176 | u_long xid; | |
1177 | { | |
1178 | register struct statfs *sf; | |
1179 | nfsm_srvars; | |
1180 | struct vnode *vp; | |
1181 | nfsv2fh_t nfh; | |
1182 | fhandle_t *fhp; | |
1183 | struct statfs statfs; | |
1184 | ||
1185 | fhp = &nfh.fh_generic; | |
1186 | nfsm_srvmtofh(fhp); | |
1187 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) | |
1188 | nfsm_reply(0); | |
1189 | sf = &statfs; | |
1190 | error = VFS_STATFS(vp->v_mount, sf); | |
1191 | vput(vp); | |
1192 | nfsm_reply(NFSX_STATFS); | |
1193 | nfsm_build(p, u_long *, NFSX_STATFS); | |
36c3043b | 1194 | *p++ = txdr_unsigned(NFS_MAXDATA); |
971b93e3 KM |
1195 | *p++ = txdr_unsigned(sf->f_fsize); |
1196 | *p++ = txdr_unsigned(sf->f_blocks); | |
1197 | *p++ = txdr_unsigned(sf->f_bfree); | |
1198 | *p = txdr_unsigned(sf->f_bavail); | |
1199 | nfsm_srvdone; | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Null operation, used by clients to ping server | |
1204 | */ | |
1205 | nfsrv_null(mrep, md, dpos, cred, xid, mrq) | |
1206 | struct mbuf **mrq; | |
1207 | struct mbuf *mrep, *md; | |
1208 | caddr_t dpos; | |
1209 | struct ucred *cred; | |
1210 | u_long xid; | |
1211 | { | |
1212 | nfsm_srvars; | |
1213 | ||
1214 | error = VNOVAL; | |
1215 | nfsm_reply(0); | |
1216 | nfsm_srvdone; | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * No operation, used for obsolete procedures | |
1221 | */ | |
1222 | nfsrv_noop(mrep, md, dpos, cred, xid, mrq) | |
1223 | struct mbuf **mrq; | |
1224 | struct mbuf *mrep, *md; | |
1225 | caddr_t dpos; | |
1226 | struct ucred *cred; | |
1227 | u_long xid; | |
1228 | { | |
1229 | nfsm_srvars; | |
1230 | ||
1231 | error = EPROCUNAVAIL; | |
1232 | nfsm_reply(0); | |
1233 | nfsm_srvdone; | |
1234 | } | |
36c3043b | 1235 | |
24ed1a73 KM |
1236 | /* |
1237 | * Perform access checking for vnodes obtained from file handles that would | |
1238 | * refer to files already opened by a Unix client. You cannot just use | |
1239 | * vn_writechk() and VOP_ACCESS() for two reasons. | |
1240 | * 1 - You must check for M_EXRDONLY as well as M_RDONLY for the write case | |
1241 | * 2 - The owner is to be given access irrespective of mode bits so that | |
1242 | * processes that chmod after opening a file don't break. I don't like | |
1243 | * this because it opens a security hole, but since the nfs server opens | |
1244 | * a security hole the size of a barn door anyhow, what the heck. | |
1245 | */ | |
1246 | nfsrv_access(vp, flags, cred) | |
1247 | register struct vnode *vp; | |
1248 | int flags; | |
1249 | register struct ucred *cred; | |
1250 | { | |
1251 | struct vattr vattr; | |
1252 | int error; | |
1253 | if (flags & VWRITE) { | |
1254 | /* Just vn_writechk() changed to check M_EXRDONLY */ | |
1255 | /* | |
1256 | * Disallow write attempts on read-only file systems; | |
1257 | * unless the file is a socket or a block or character | |
1258 | * device resident on the file system. | |
1259 | */ | |
1260 | if ((vp->v_mount->m_flag & (M_RDONLY | M_EXRDONLY)) && | |
1261 | vp->v_type != VCHR && | |
1262 | vp->v_type != VBLK && | |
1263 | vp->v_type != VSOCK) | |
1264 | return (EROFS); | |
1265 | /* | |
1266 | * If there's shared text associated with | |
1267 | * the inode, try to free it up once. If | |
1268 | * we fail, we can't allow writing. | |
1269 | */ | |
1270 | if (vp->v_flag & VTEXT) | |
1271 | xrele(vp); | |
1272 | if (vp->v_flag & VTEXT) | |
1273 | return (ETXTBSY); | |
1274 | if (error = VOP_GETATTR(vp, &vattr, cred)) | |
1275 | return (error); | |
1276 | if (cred->cr_uid == vattr.va_uid) | |
1277 | return (0); | |
1278 | } else { | |
1279 | if (error = VOP_GETATTR(vp, &vattr, cred)) | |
1280 | return (error); | |
1281 | if (cred->cr_uid == vattr.va_uid) | |
1282 | return (0); | |
1283 | } | |
1284 | return (VOP_ACCESS(vp, flags, cred)); | |
1285 | } |