1 | /* $NetBSD: nfs_vnops.c,v 1.309 2016/01/19 10:56:59 hannken Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1989, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to Berkeley by |
8 | * Rick Macklem at The University of Guelph. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * 3. Neither the name of the University nor the names of its contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 |
35 | */ |
36 | |
37 | /* |
38 | * vnode op calls for Sun NFS version 2 and 3 |
39 | */ |
40 | |
41 | #include <sys/cdefs.h> |
42 | __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.309 2016/01/19 10:56:59 hannken Exp $" ); |
43 | |
44 | #ifdef _KERNEL_OPT |
45 | #include "opt_nfs.h" |
46 | #include "opt_uvmhist.h" |
47 | #endif |
48 | |
49 | #include <sys/param.h> |
50 | #include <sys/proc.h> |
51 | #include <sys/kernel.h> |
52 | #include <sys/systm.h> |
53 | #include <sys/resourcevar.h> |
54 | #include <sys/mount.h> |
55 | #include <sys/buf.h> |
56 | #include <sys/condvar.h> |
57 | #include <sys/disk.h> |
58 | #include <sys/malloc.h> |
59 | #include <sys/kmem.h> |
60 | #include <sys/mbuf.h> |
61 | #include <sys/mutex.h> |
62 | #include <sys/namei.h> |
63 | #include <sys/vnode.h> |
64 | #include <sys/dirent.h> |
65 | #include <sys/fcntl.h> |
66 | #include <sys/hash.h> |
67 | #include <sys/lockf.h> |
68 | #include <sys/stat.h> |
69 | #include <sys/unistd.h> |
70 | #include <sys/kauth.h> |
71 | #include <sys/cprng.h> |
72 | |
73 | #include <uvm/uvm_extern.h> |
74 | #include <uvm/uvm.h> |
75 | |
76 | #include <miscfs/fifofs/fifo.h> |
77 | #include <miscfs/genfs/genfs.h> |
78 | #include <miscfs/genfs/genfs_node.h> |
79 | #include <miscfs/specfs/specdev.h> |
80 | |
81 | #include <nfs/rpcv2.h> |
82 | #include <nfs/nfsproto.h> |
83 | #include <nfs/nfs.h> |
84 | #include <nfs/nfsnode.h> |
85 | #include <nfs/nfsmount.h> |
86 | #include <nfs/xdr_subs.h> |
87 | #include <nfs/nfsm_subs.h> |
88 | #include <nfs/nfs_var.h> |
89 | |
90 | #include <net/if.h> |
91 | #include <netinet/in.h> |
92 | #include <netinet/in_var.h> |
93 | |
94 | /* |
95 | * Global vfs data structures for nfs |
96 | */ |
97 | int (**nfsv2_vnodeop_p)(void *); |
98 | const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { |
99 | { &vop_default_desc, vn_default_error }, |
100 | { &vop_lookup_desc, nfs_lookup }, /* lookup */ |
101 | { &vop_create_desc, nfs_create }, /* create */ |
102 | { &vop_mknod_desc, nfs_mknod }, /* mknod */ |
103 | { &vop_open_desc, nfs_open }, /* open */ |
104 | { &vop_close_desc, nfs_close }, /* close */ |
105 | { &vop_access_desc, nfs_access }, /* access */ |
106 | { &vop_getattr_desc, nfs_getattr }, /* getattr */ |
107 | { &vop_setattr_desc, nfs_setattr }, /* setattr */ |
108 | { &vop_read_desc, nfs_read }, /* read */ |
109 | { &vop_write_desc, nfs_write }, /* write */ |
110 | { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ |
111 | { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ |
112 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
113 | { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ |
114 | { &vop_poll_desc, nfs_poll }, /* poll */ |
115 | { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ |
116 | { &vop_revoke_desc, nfs_revoke }, /* revoke */ |
117 | { &vop_mmap_desc, nfs_mmap }, /* mmap */ |
118 | { &vop_fsync_desc, nfs_fsync }, /* fsync */ |
119 | { &vop_seek_desc, nfs_seek }, /* seek */ |
120 | { &vop_remove_desc, nfs_remove }, /* remove */ |
121 | { &vop_link_desc, nfs_link }, /* link */ |
122 | { &vop_rename_desc, nfs_rename }, /* rename */ |
123 | { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ |
124 | { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ |
125 | { &vop_symlink_desc, nfs_symlink }, /* symlink */ |
126 | { &vop_readdir_desc, nfs_readdir }, /* readdir */ |
127 | { &vop_readlink_desc, nfs_readlink }, /* readlink */ |
128 | { &vop_abortop_desc, nfs_abortop }, /* abortop */ |
129 | { &vop_inactive_desc, nfs_inactive }, /* inactive */ |
130 | { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ |
131 | { &vop_lock_desc, nfs_lock }, /* lock */ |
132 | { &vop_unlock_desc, nfs_unlock }, /* unlock */ |
133 | { &vop_bmap_desc, nfs_bmap }, /* bmap */ |
134 | { &vop_strategy_desc, nfs_strategy }, /* strategy */ |
135 | { &vop_print_desc, nfs_print }, /* print */ |
136 | { &vop_islocked_desc, nfs_islocked }, /* islocked */ |
137 | { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ |
138 | { &vop_advlock_desc, nfs_advlock }, /* advlock */ |
139 | { &vop_bwrite_desc, genfs_badop }, /* bwrite */ |
140 | { &vop_getpages_desc, nfs_getpages }, /* getpages */ |
141 | { &vop_putpages_desc, genfs_putpages }, /* putpages */ |
142 | { NULL, NULL } |
143 | }; |
144 | const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = |
145 | { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; |
146 | |
147 | /* |
148 | * Special device vnode ops |
149 | */ |
150 | int (**spec_nfsv2nodeop_p)(void *); |
151 | const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { |
152 | { &vop_default_desc, vn_default_error }, |
153 | { &vop_lookup_desc, spec_lookup }, /* lookup */ |
154 | { &vop_create_desc, spec_create }, /* create */ |
155 | { &vop_mknod_desc, spec_mknod }, /* mknod */ |
156 | { &vop_open_desc, spec_open }, /* open */ |
157 | { &vop_close_desc, nfsspec_close }, /* close */ |
158 | { &vop_access_desc, nfsspec_access }, /* access */ |
159 | { &vop_getattr_desc, nfs_getattr }, /* getattr */ |
160 | { &vop_setattr_desc, nfs_setattr }, /* setattr */ |
161 | { &vop_read_desc, nfsspec_read }, /* read */ |
162 | { &vop_write_desc, nfsspec_write }, /* write */ |
163 | { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ |
164 | { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ |
165 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
166 | { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ |
167 | { &vop_poll_desc, spec_poll }, /* poll */ |
168 | { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ |
169 | { &vop_revoke_desc, spec_revoke }, /* revoke */ |
170 | { &vop_mmap_desc, spec_mmap }, /* mmap */ |
171 | { &vop_fsync_desc, spec_fsync }, /* fsync */ |
172 | { &vop_seek_desc, spec_seek }, /* seek */ |
173 | { &vop_remove_desc, spec_remove }, /* remove */ |
174 | { &vop_link_desc, spec_link }, /* link */ |
175 | { &vop_rename_desc, spec_rename }, /* rename */ |
176 | { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ |
177 | { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ |
178 | { &vop_symlink_desc, spec_symlink }, /* symlink */ |
179 | { &vop_readdir_desc, spec_readdir }, /* readdir */ |
180 | { &vop_readlink_desc, spec_readlink }, /* readlink */ |
181 | { &vop_abortop_desc, spec_abortop }, /* abortop */ |
182 | { &vop_inactive_desc, nfs_inactive }, /* inactive */ |
183 | { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ |
184 | { &vop_lock_desc, nfs_lock }, /* lock */ |
185 | { &vop_unlock_desc, nfs_unlock }, /* unlock */ |
186 | { &vop_bmap_desc, spec_bmap }, /* bmap */ |
187 | { &vop_strategy_desc, spec_strategy }, /* strategy */ |
188 | { &vop_print_desc, nfs_print }, /* print */ |
189 | { &vop_islocked_desc, nfs_islocked }, /* islocked */ |
190 | { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ |
191 | { &vop_advlock_desc, spec_advlock }, /* advlock */ |
192 | { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ |
193 | { &vop_getpages_desc, spec_getpages }, /* getpages */ |
194 | { &vop_putpages_desc, spec_putpages }, /* putpages */ |
195 | { NULL, NULL } |
196 | }; |
197 | const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = |
198 | { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; |
199 | |
200 | int (**fifo_nfsv2nodeop_p)(void *); |
201 | const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { |
202 | { &vop_default_desc, vn_default_error }, |
203 | { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */ |
204 | { &vop_create_desc, vn_fifo_bypass }, /* create */ |
205 | { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */ |
206 | { &vop_open_desc, vn_fifo_bypass }, /* open */ |
207 | { &vop_close_desc, nfsfifo_close }, /* close */ |
208 | { &vop_access_desc, nfsspec_access }, /* access */ |
209 | { &vop_getattr_desc, nfs_getattr }, /* getattr */ |
210 | { &vop_setattr_desc, nfs_setattr }, /* setattr */ |
211 | { &vop_read_desc, nfsfifo_read }, /* read */ |
212 | { &vop_write_desc, nfsfifo_write }, /* write */ |
213 | { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ |
214 | { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ |
215 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
216 | { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ |
217 | { &vop_poll_desc, vn_fifo_bypass }, /* poll */ |
218 | { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ |
219 | { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */ |
220 | { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */ |
221 | { &vop_fsync_desc, nfs_fsync }, /* fsync */ |
222 | { &vop_seek_desc, vn_fifo_bypass }, /* seek */ |
223 | { &vop_remove_desc, vn_fifo_bypass }, /* remove */ |
224 | { &vop_link_desc, vn_fifo_bypass }, /* link */ |
225 | { &vop_rename_desc, vn_fifo_bypass }, /* rename */ |
226 | { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */ |
227 | { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */ |
228 | { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */ |
229 | { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */ |
230 | { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */ |
231 | { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */ |
232 | { &vop_inactive_desc, nfs_inactive }, /* inactive */ |
233 | { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ |
234 | { &vop_lock_desc, nfs_lock }, /* lock */ |
235 | { &vop_unlock_desc, nfs_unlock }, /* unlock */ |
236 | { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */ |
237 | { &vop_strategy_desc, genfs_badop }, /* strategy */ |
238 | { &vop_print_desc, nfs_print }, /* print */ |
239 | { &vop_islocked_desc, nfs_islocked }, /* islocked */ |
240 | { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ |
241 | { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */ |
242 | { &vop_bwrite_desc, genfs_badop }, /* bwrite */ |
243 | { &vop_putpages_desc, vn_fifo_bypass }, /* putpages */ |
244 | { NULL, NULL } |
245 | }; |
246 | const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = |
247 | { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; |
248 | |
249 | static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, |
250 | size_t, kauth_cred_t, struct lwp *); |
251 | static void nfs_writerpc_extfree(struct mbuf *, void *, size_t, void *); |
252 | |
253 | /* |
254 | * Global variables |
255 | */ |
256 | extern u_int32_t nfs_true, nfs_false; |
257 | extern u_int32_t nfs_xdrneg1; |
258 | extern const nfstype nfsv3_type[9]; |
259 | |
260 | int nfs_numasync = 0; |
261 | #define DIRHDSIZ _DIRENT_NAMEOFF(dp) |
262 | #define UIO_ADVANCE(uio, siz) \ |
263 | (void)((uio)->uio_resid -= (siz), \ |
264 | (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ |
265 | (uio)->uio_iov->iov_len -= (siz)) |
266 | |
267 | static void nfs_cache_enter(struct vnode *, struct vnode *, |
268 | struct componentname *); |
269 | |
270 | static void |
271 | nfs_cache_enter(struct vnode *dvp, struct vnode *vp, |
272 | struct componentname *cnp) |
273 | { |
274 | struct nfsnode *dnp = VTONFS(dvp); |
275 | |
276 | if ((cnp->cn_flags & MAKEENTRY) == 0) { |
277 | return; |
278 | } |
279 | if (vp != NULL) { |
280 | struct nfsnode *np = VTONFS(vp); |
281 | |
282 | np->n_ctime = np->n_vattr->va_ctime.tv_sec; |
283 | } |
284 | |
285 | if (!timespecisset(&dnp->n_nctime)) |
286 | dnp->n_nctime = dnp->n_vattr->va_mtime; |
287 | |
288 | cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_flags); |
289 | } |
290 | |
291 | /* |
292 | * nfs null call from vfs. |
293 | */ |
294 | int |
295 | nfs_null(struct vnode *vp, kauth_cred_t cred, struct lwp *l) |
296 | { |
297 | char *bpos, *dpos; |
298 | int error = 0; |
299 | struct mbuf *mreq, *mrep, *md, *mb __unused; |
300 | struct nfsnode *np = VTONFS(vp); |
301 | |
302 | nfsm_reqhead(np, NFSPROC_NULL, 0); |
303 | nfsm_request(np, NFSPROC_NULL, l, cred); |
304 | nfsm_reqdone; |
305 | return (error); |
306 | } |
307 | |
308 | /* |
309 | * nfs access vnode op. |
310 | * For nfs version 2, just return ok. File accesses may fail later. |
311 | * For nfs version 3, use the access rpc to check accessibility. If file modes |
312 | * are changed on the server, accesses might still fail later. |
313 | */ |
314 | int |
315 | nfs_access(void *v) |
316 | { |
317 | struct vop_access_args /* { |
318 | struct vnode *a_vp; |
319 | int a_mode; |
320 | kauth_cred_t a_cred; |
321 | } */ *ap = v; |
322 | struct vnode *vp = ap->a_vp; |
323 | #ifndef NFS_V2_ONLY |
324 | u_int32_t *tl; |
325 | char *cp; |
326 | int32_t t1, t2; |
327 | char *bpos, *dpos, *cp2; |
328 | int error = 0, attrflag; |
329 | struct mbuf *mreq, *mrep, *md, *mb; |
330 | u_int32_t mode, rmode; |
331 | const int v3 = NFS_ISV3(vp); |
332 | #endif |
333 | int cachevalid; |
334 | struct nfsnode *np = VTONFS(vp); |
335 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
336 | |
337 | cachevalid = (np->n_accstamp != -1 && |
338 | (time_uptime - np->n_accstamp) < nfs_attrtimeo(nmp, np) && |
339 | np->n_accuid == kauth_cred_geteuid(ap->a_cred)); |
340 | |
341 | /* |
342 | * Check access cache first. If this request has been made for this |
343 | * uid shortly before, use the cached result. |
344 | */ |
345 | if (cachevalid) { |
346 | if (!np->n_accerror) { |
347 | if ((np->n_accmode & ap->a_mode) == ap->a_mode) |
348 | return np->n_accerror; |
349 | } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) |
350 | return np->n_accerror; |
351 | } |
352 | |
353 | #ifndef NFS_V2_ONLY |
354 | /* |
355 | * For nfs v3, do an access rpc, otherwise you are stuck emulating |
356 | * ufs_access() locally using the vattr. This may not be correct, |
357 | * since the server may apply other access criteria such as |
358 | * client uid-->server uid mapping that we do not know about, but |
359 | * this is better than just returning anything that is lying about |
360 | * in the cache. |
361 | */ |
362 | if (v3) { |
363 | nfsstats.rpccnt[NFSPROC_ACCESS]++; |
364 | nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); |
365 | nfsm_fhtom(np, v3); |
366 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
367 | if (ap->a_mode & VREAD) |
368 | mode = NFSV3ACCESS_READ; |
369 | else |
370 | mode = 0; |
371 | if (vp->v_type != VDIR) { |
372 | if (ap->a_mode & VWRITE) |
373 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); |
374 | if (ap->a_mode & VEXEC) |
375 | mode |= NFSV3ACCESS_EXECUTE; |
376 | } else { |
377 | if (ap->a_mode & VWRITE) |
378 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | |
379 | NFSV3ACCESS_DELETE); |
380 | if (ap->a_mode & VEXEC) |
381 | mode |= NFSV3ACCESS_LOOKUP; |
382 | } |
383 | *tl = txdr_unsigned(mode); |
384 | nfsm_request(np, NFSPROC_ACCESS, curlwp, ap->a_cred); |
385 | nfsm_postop_attr(vp, attrflag, 0); |
386 | if (!error) { |
387 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
388 | rmode = fxdr_unsigned(u_int32_t, *tl); |
389 | /* |
390 | * The NFS V3 spec does not clarify whether or not |
391 | * the returned access bits can be a superset of |
392 | * the ones requested, so... |
393 | */ |
394 | if ((rmode & mode) != mode) |
395 | error = EACCES; |
396 | } |
397 | nfsm_reqdone; |
398 | } else |
399 | #endif |
400 | return (nfsspec_access(ap)); |
401 | #ifndef NFS_V2_ONLY |
402 | /* |
403 | * Disallow write attempts on filesystems mounted read-only; |
404 | * unless the file is a socket, fifo, or a block or character |
405 | * device resident on the filesystem. |
406 | */ |
407 | if (!error && (ap->a_mode & VWRITE) && |
408 | (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
409 | switch (vp->v_type) { |
410 | case VREG: |
411 | case VDIR: |
412 | case VLNK: |
413 | error = EROFS; |
414 | default: |
415 | break; |
416 | } |
417 | } |
418 | |
419 | if (!error || error == EACCES) { |
420 | /* |
421 | * If we got the same result as for a previous, |
422 | * different request, OR it in. Don't update |
423 | * the timestamp in that case. |
424 | */ |
425 | if (cachevalid && np->n_accstamp != -1 && |
426 | error == np->n_accerror) { |
427 | if (!error) |
428 | np->n_accmode |= ap->a_mode; |
429 | else if ((np->n_accmode & ap->a_mode) == ap->a_mode) |
430 | np->n_accmode = ap->a_mode; |
431 | } else { |
432 | np->n_accstamp = time_uptime; |
433 | np->n_accuid = kauth_cred_geteuid(ap->a_cred); |
434 | np->n_accmode = ap->a_mode; |
435 | np->n_accerror = error; |
436 | } |
437 | } |
438 | |
439 | return (error); |
440 | #endif |
441 | } |
442 | |
443 | /* |
444 | * nfs open vnode op |
445 | * Check to see if the type is ok |
446 | * and that deletion is not in progress. |
447 | * For paged in text files, you will need to flush the page cache |
448 | * if consistency is lost. |
449 | */ |
450 | /* ARGSUSED */ |
451 | int |
452 | nfs_open(void *v) |
453 | { |
454 | struct vop_open_args /* { |
455 | struct vnode *a_vp; |
456 | int a_mode; |
457 | kauth_cred_t a_cred; |
458 | } */ *ap = v; |
459 | struct vnode *vp = ap->a_vp; |
460 | struct nfsnode *np = VTONFS(vp); |
461 | int error; |
462 | |
463 | if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { |
464 | return (EACCES); |
465 | } |
466 | |
467 | if (ap->a_mode & FREAD) { |
468 | if (np->n_rcred != NULL) |
469 | kauth_cred_free(np->n_rcred); |
470 | np->n_rcred = ap->a_cred; |
471 | kauth_cred_hold(np->n_rcred); |
472 | } |
473 | if (ap->a_mode & FWRITE) { |
474 | if (np->n_wcred != NULL) |
475 | kauth_cred_free(np->n_wcred); |
476 | np->n_wcred = ap->a_cred; |
477 | kauth_cred_hold(np->n_wcred); |
478 | } |
479 | |
480 | error = nfs_flushstalebuf(vp, ap->a_cred, curlwp, 0); |
481 | if (error) |
482 | return error; |
483 | |
484 | NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ |
485 | |
486 | return (0); |
487 | } |
488 | |
489 | /* |
490 | * nfs close vnode op |
491 | * What an NFS client should do upon close after writing is a debatable issue. |
492 | * Most NFS clients push delayed writes to the server upon close, basically for |
493 | * two reasons: |
494 | * 1 - So that any write errors may be reported back to the client process |
495 | * doing the close system call. By far the two most likely errors are |
496 | * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. |
497 | * 2 - To put a worst case upper bound on cache inconsistency between |
498 | * multiple clients for the file. |
499 | * There is also a consistency problem for Version 2 of the protocol w.r.t. |
500 | * not being able to tell if other clients are writing a file concurrently, |
501 | * since there is no way of knowing if the changed modify time in the reply |
502 | * is only due to the write for this client. |
503 | * (NFS Version 3 provides weak cache consistency data in the reply that |
504 | * should be sufficient to detect and handle this case.) |
505 | * |
506 | * The current code does the following: |
507 | * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers |
508 | * for NFS Version 3 - flush dirty buffers to the server but don't invalidate |
509 | * or commit them (this satisfies 1 and 2 except for the |
510 | * case where the server crashes after this close but |
511 | * before the commit RPC, which is felt to be "good |
512 | * enough". Changing the last argument to nfs_flush() to |
513 | * a 1 would force a commit operation, if it is felt a |
514 | * commit is necessary now. |
515 | */ |
516 | /* ARGSUSED */ |
517 | int |
518 | nfs_close(void *v) |
519 | { |
520 | struct vop_close_args /* { |
521 | struct vnodeop_desc *a_desc; |
522 | struct vnode *a_vp; |
523 | int a_fflag; |
524 | kauth_cred_t a_cred; |
525 | } */ *ap = v; |
526 | struct vnode *vp = ap->a_vp; |
527 | struct nfsnode *np = VTONFS(vp); |
528 | int error = 0; |
529 | UVMHIST_FUNC("nfs_close" ); UVMHIST_CALLED(ubchist); |
530 | |
531 | if (vp->v_type == VREG) { |
532 | if (np->n_flag & NMODIFIED) { |
533 | #ifndef NFS_V2_ONLY |
534 | if (NFS_ISV3(vp)) { |
535 | error = nfs_flush(vp, ap->a_cred, MNT_WAIT, curlwp, 0); |
536 | np->n_flag &= ~NMODIFIED; |
537 | } else |
538 | #endif |
539 | error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, curlwp, 1); |
540 | NFS_INVALIDATE_ATTRCACHE(np); |
541 | } |
542 | if (np->n_flag & NWRITEERR) { |
543 | np->n_flag &= ~NWRITEERR; |
544 | error = np->n_error; |
545 | } |
546 | } |
547 | UVMHIST_LOG(ubchist, "returning %d" , error,0,0,0); |
548 | return (error); |
549 | } |
550 | |
551 | /* |
552 | * nfs getattr call from vfs. |
553 | */ |
554 | int |
555 | nfs_getattr(void *v) |
556 | { |
557 | struct vop_getattr_args /* { |
558 | struct vnode *a_vp; |
559 | struct vattr *a_vap; |
560 | kauth_cred_t a_cred; |
561 | } */ *ap = v; |
562 | struct vnode *vp = ap->a_vp; |
563 | struct nfsnode *np = VTONFS(vp); |
564 | char *cp; |
565 | u_int32_t *tl; |
566 | int32_t t1, t2; |
567 | char *bpos, *dpos; |
568 | int error = 0; |
569 | struct mbuf *mreq, *mrep, *md, *mb; |
570 | const int v3 = NFS_ISV3(vp); |
571 | |
572 | /* |
573 | * Update local times for special files. |
574 | */ |
575 | if (np->n_flag & (NACC | NUPD)) |
576 | np->n_flag |= NCHG; |
577 | |
578 | /* |
579 | * if we have delayed truncation, do it now. |
580 | */ |
581 | nfs_delayedtruncate(vp); |
582 | |
583 | /* |
584 | * First look in the cache. |
585 | */ |
586 | if (nfs_getattrcache(vp, ap->a_vap) == 0) |
587 | return (0); |
588 | nfsstats.rpccnt[NFSPROC_GETATTR]++; |
589 | nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); |
590 | nfsm_fhtom(np, v3); |
591 | nfsm_request(np, NFSPROC_GETATTR, curlwp, ap->a_cred); |
592 | if (!error) { |
593 | nfsm_loadattr(vp, ap->a_vap, 0); |
594 | if (vp->v_type == VDIR && |
595 | ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) |
596 | ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; |
597 | } |
598 | nfsm_reqdone; |
599 | return (error); |
600 | } |
601 | |
602 | /* |
603 | * nfs setattr call. |
604 | */ |
605 | int |
606 | nfs_setattr(void *v) |
607 | { |
608 | struct vop_setattr_args /* { |
609 | struct vnodeop_desc *a_desc; |
610 | struct vnode *a_vp; |
611 | struct vattr *a_vap; |
612 | kauth_cred_t a_cred; |
613 | } */ *ap = v; |
614 | struct vnode *vp = ap->a_vp; |
615 | struct nfsnode *np = VTONFS(vp); |
616 | struct vattr *vap = ap->a_vap; |
617 | int error = 0; |
618 | u_quad_t tsize = 0; |
619 | |
620 | /* |
621 | * Setting of flags is not supported. |
622 | */ |
623 | if (vap->va_flags != VNOVAL) |
624 | return (EOPNOTSUPP); |
625 | |
626 | /* |
627 | * Disallow write attempts if the filesystem is mounted read-only. |
628 | */ |
629 | if ((vap->va_uid != (uid_t)VNOVAL || |
630 | vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || |
631 | vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && |
632 | (vp->v_mount->mnt_flag & MNT_RDONLY)) |
633 | return (EROFS); |
634 | if (vap->va_size != VNOVAL) { |
635 | if (vap->va_size > VFSTONFS(vp->v_mount)->nm_maxfilesize) { |
636 | return EFBIG; |
637 | } |
638 | switch (vp->v_type) { |
639 | case VDIR: |
640 | return (EISDIR); |
641 | case VCHR: |
642 | case VBLK: |
643 | case VSOCK: |
644 | case VFIFO: |
645 | if (vap->va_mtime.tv_sec == VNOVAL && |
646 | vap->va_atime.tv_sec == VNOVAL && |
647 | vap->va_mode == (mode_t)VNOVAL && |
648 | vap->va_uid == (uid_t)VNOVAL && |
649 | vap->va_gid == (gid_t)VNOVAL) |
650 | return (0); |
651 | vap->va_size = VNOVAL; |
652 | break; |
653 | default: |
654 | /* |
655 | * Disallow write attempts if the filesystem is |
656 | * mounted read-only. |
657 | */ |
658 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
659 | return (EROFS); |
660 | genfs_node_wrlock(vp); |
661 | uvm_vnp_setsize(vp, vap->va_size); |
662 | tsize = np->n_size; |
663 | np->n_size = vap->va_size; |
664 | if (vap->va_size == 0) |
665 | error = nfs_vinvalbuf(vp, 0, |
666 | ap->a_cred, curlwp, 1); |
667 | else |
668 | error = nfs_vinvalbuf(vp, V_SAVE, |
669 | ap->a_cred, curlwp, 1); |
670 | if (error) { |
671 | uvm_vnp_setsize(vp, tsize); |
672 | genfs_node_unlock(vp); |
673 | return (error); |
674 | } |
675 | np->n_vattr->va_size = vap->va_size; |
676 | } |
677 | } else { |
678 | /* |
679 | * flush files before setattr because a later write of |
680 | * cached data might change timestamps or reset sugid bits |
681 | */ |
682 | if ((vap->va_mtime.tv_sec != VNOVAL || |
683 | vap->va_atime.tv_sec != VNOVAL || |
684 | vap->va_mode != VNOVAL) && |
685 | vp->v_type == VREG && |
686 | (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, |
687 | curlwp, 1)) == EINTR) |
688 | return (error); |
689 | } |
690 | error = nfs_setattrrpc(vp, vap, ap->a_cred, curlwp); |
691 | if (vap->va_size != VNOVAL) { |
692 | if (error) { |
693 | np->n_size = np->n_vattr->va_size = tsize; |
694 | uvm_vnp_setsize(vp, np->n_size); |
695 | } |
696 | genfs_node_unlock(vp); |
697 | } |
698 | VN_KNOTE(vp, NOTE_ATTRIB); |
699 | return (error); |
700 | } |
701 | |
702 | /* |
703 | * Do an nfs setattr rpc. |
704 | */ |
705 | int |
706 | nfs_setattrrpc(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, struct lwp *l) |
707 | { |
708 | struct nfsv2_sattr *sp; |
709 | char *cp; |
710 | int32_t t1, t2; |
711 | char *bpos, *dpos; |
712 | u_int32_t *tl; |
713 | int error = 0; |
714 | struct mbuf *mreq, *mrep, *md, *mb; |
715 | const int v3 = NFS_ISV3(vp); |
716 | struct nfsnode *np = VTONFS(vp); |
717 | #ifndef NFS_V2_ONLY |
718 | int wccflag = NFSV3_WCCRATTR; |
719 | char *cp2; |
720 | #endif |
721 | |
722 | nfsstats.rpccnt[NFSPROC_SETATTR]++; |
723 | nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); |
724 | nfsm_fhtom(np, v3); |
725 | #ifndef NFS_V2_ONLY |
726 | if (v3) { |
727 | nfsm_v3attrbuild(vap, true); |
728 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
729 | *tl = nfs_false; |
730 | } else { |
731 | #endif |
732 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
733 | if (vap->va_mode == (mode_t)VNOVAL) |
734 | sp->sa_mode = nfs_xdrneg1; |
735 | else |
736 | sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); |
737 | if (vap->va_uid == (uid_t)VNOVAL) |
738 | sp->sa_uid = nfs_xdrneg1; |
739 | else |
740 | sp->sa_uid = txdr_unsigned(vap->va_uid); |
741 | if (vap->va_gid == (gid_t)VNOVAL) |
742 | sp->sa_gid = nfs_xdrneg1; |
743 | else |
744 | sp->sa_gid = txdr_unsigned(vap->va_gid); |
745 | sp->sa_size = txdr_unsigned(vap->va_size); |
746 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
747 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
748 | #ifndef NFS_V2_ONLY |
749 | } |
750 | #endif |
751 | nfsm_request(np, NFSPROC_SETATTR, l, cred); |
752 | #ifndef NFS_V2_ONLY |
753 | if (v3) { |
754 | nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); |
755 | } else |
756 | #endif |
757 | nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); |
758 | nfsm_reqdone; |
759 | return (error); |
760 | } |
761 | |
762 | /* |
763 | * nfs lookup call, one step at a time... |
764 | * First look in cache |
765 | * If not found, do the rpc. |
766 | */ |
767 | int |
768 | nfs_lookup(void *v) |
769 | { |
770 | struct vop_lookup_v2_args /* { |
771 | struct vnodeop_desc *a_desc; |
772 | struct vnode *a_dvp; |
773 | struct vnode **a_vpp; |
774 | struct componentname *a_cnp; |
775 | } */ *ap = v; |
776 | struct componentname *cnp = ap->a_cnp; |
777 | struct vnode *dvp = ap->a_dvp; |
778 | struct vnode **vpp = ap->a_vpp; |
779 | int flags; |
780 | struct vnode *newvp; |
781 | u_int32_t *tl; |
782 | char *cp; |
783 | int32_t t1, t2; |
784 | char *bpos, *dpos, *cp2; |
785 | struct mbuf *mreq, *mrep, *md, *mb; |
786 | long len; |
787 | nfsfh_t *fhp; |
788 | struct nfsnode *np; |
789 | int cachefound; |
790 | int error = 0, attrflag, fhsize; |
791 | const int v3 = NFS_ISV3(dvp); |
792 | |
793 | flags = cnp->cn_flags; |
794 | |
795 | *vpp = NULLVP; |
796 | newvp = NULLVP; |
797 | if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && |
798 | (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) |
799 | return (EROFS); |
800 | if (dvp->v_type != VDIR) |
801 | return (ENOTDIR); |
802 | |
803 | /* |
804 | * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. |
805 | */ |
806 | if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { |
807 | error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); |
808 | if (error) |
809 | return error; |
810 | if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) |
811 | return EISDIR; |
812 | vref(dvp); |
813 | *vpp = dvp; |
814 | return 0; |
815 | } |
816 | |
817 | np = VTONFS(dvp); |
818 | |
819 | /* |
820 | * Before performing an RPC, check the name cache to see if |
821 | * the directory/name pair we are looking for is known already. |
822 | * If the directory/name pair is found in the name cache, |
823 | * we have to ensure the directory has not changed from |
824 | * the time the cache entry has been created. If it has, |
825 | * the cache entry has to be ignored. |
826 | */ |
827 | cachefound = cache_lookup_raw(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
828 | cnp->cn_flags, NULL, vpp); |
829 | KASSERT(dvp != *vpp); |
830 | KASSERT((cnp->cn_flags & ISWHITEOUT) == 0); |
831 | if (cachefound) { |
832 | struct vattr vattr; |
833 | |
834 | error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); |
835 | if (error != 0) { |
836 | if (*vpp != NULLVP) |
837 | vrele(*vpp); |
838 | *vpp = NULLVP; |
839 | return error; |
840 | } |
841 | |
842 | if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred) |
843 | || timespeccmp(&vattr.va_mtime, |
844 | &VTONFS(dvp)->n_nctime, !=)) { |
845 | if (*vpp != NULLVP) { |
846 | vrele(*vpp); |
847 | *vpp = NULLVP; |
848 | } |
849 | cache_purge1(dvp, NULL, 0, PURGE_CHILDREN); |
850 | timespecclear(&np->n_nctime); |
851 | goto dorpc; |
852 | } |
853 | |
854 | if (*vpp == NULLVP) { |
855 | /* namecache gave us a negative result */ |
856 | error = ENOENT; |
857 | goto noentry; |
858 | } |
859 | |
860 | /* |
861 | * investigate the vnode returned by cache_lookup_raw. |
862 | * if it isn't appropriate, do an rpc. |
863 | */ |
864 | newvp = *vpp; |
865 | if ((flags & ISDOTDOT) != 0) { |
866 | VOP_UNLOCK(dvp); |
867 | } |
868 | error = vn_lock(newvp, LK_SHARED); |
869 | if ((flags & ISDOTDOT) != 0) { |
870 | vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); |
871 | } |
872 | if (error != 0) { |
873 | /* newvp has been reclaimed. */ |
874 | vrele(newvp); |
875 | *vpp = NULLVP; |
876 | goto dorpc; |
877 | } |
878 | if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) |
879 | && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { |
880 | nfsstats.lookupcache_hits++; |
881 | KASSERT(newvp->v_type != VNON); |
882 | VOP_UNLOCK(newvp); |
883 | return (0); |
884 | } |
885 | cache_purge1(newvp, NULL, 0, PURGE_PARENTS); |
886 | vput(newvp); |
887 | *vpp = NULLVP; |
888 | } |
889 | dorpc: |
890 | #if 0 |
891 | /* |
892 | * because nfsv3 has the same CREATE semantics as ours, |
893 | * we don't have to perform LOOKUPs beforehand. |
894 | * |
895 | * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. |
896 | * XXX although we have no way to know if O_EXCL is requested or not. |
897 | */ |
898 | |
899 | if (v3 && cnp->cn_nameiop == CREATE && |
900 | (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && |
901 | (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
902 | return (EJUSTRETURN); |
903 | } |
904 | #endif /* 0 */ |
905 | |
906 | error = 0; |
907 | newvp = NULLVP; |
908 | nfsstats.lookupcache_misses++; |
909 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
910 | len = cnp->cn_namelen; |
911 | nfsm_reqhead(np, NFSPROC_LOOKUP, |
912 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
913 | nfsm_fhtom(np, v3); |
914 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
915 | nfsm_request(np, NFSPROC_LOOKUP, curlwp, cnp->cn_cred); |
916 | if (error) { |
917 | nfsm_postop_attr(dvp, attrflag, 0); |
918 | m_freem(mrep); |
919 | goto nfsmout; |
920 | } |
921 | nfsm_getfh(fhp, fhsize, v3); |
922 | |
923 | /* |
924 | * Handle RENAME case... |
925 | */ |
926 | if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { |
927 | if (NFS_CMPFH(np, fhp, fhsize)) { |
928 | m_freem(mrep); |
929 | return (EISDIR); |
930 | } |
931 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
932 | if (error) { |
933 | m_freem(mrep); |
934 | return error; |
935 | } |
936 | newvp = NFSTOV(np); |
937 | #ifndef NFS_V2_ONLY |
938 | if (v3) { |
939 | nfsm_postop_attr(newvp, attrflag, 0); |
940 | nfsm_postop_attr(dvp, attrflag, 0); |
941 | } else |
942 | #endif |
943 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
944 | *vpp = newvp; |
945 | m_freem(mrep); |
946 | goto validate; |
947 | } |
948 | |
949 | /* |
950 | * The postop attr handling is duplicated for each if case, |
951 | * because it should be done while dvp is locked (unlocking |
952 | * dvp is different for each case). |
953 | */ |
954 | |
955 | if (NFS_CMPFH(np, fhp, fhsize)) { |
956 | /* |
957 | * As we handle "." lookup locally, this is |
958 | * a broken server. |
959 | */ |
960 | m_freem(mrep); |
961 | return EBADRPC; |
962 | } else if (flags & ISDOTDOT) { |
963 | /* |
964 | * ".." lookup |
965 | */ |
966 | VOP_UNLOCK(dvp); |
967 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
968 | vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); |
969 | if (error) { |
970 | m_freem(mrep); |
971 | return error; |
972 | } |
973 | newvp = NFSTOV(np); |
974 | |
975 | #ifndef NFS_V2_ONLY |
976 | if (v3) { |
977 | nfsm_postop_attr(newvp, attrflag, 0); |
978 | nfsm_postop_attr(dvp, attrflag, 0); |
979 | } else |
980 | #endif |
981 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
982 | } else { |
983 | /* |
984 | * Other lookups. |
985 | */ |
986 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
987 | if (error) { |
988 | m_freem(mrep); |
989 | return error; |
990 | } |
991 | newvp = NFSTOV(np); |
992 | #ifndef NFS_V2_ONLY |
993 | if (v3) { |
994 | nfsm_postop_attr(newvp, attrflag, 0); |
995 | nfsm_postop_attr(dvp, attrflag, 0); |
996 | } else |
997 | #endif |
998 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
999 | } |
1000 | if (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) { |
1001 | nfs_cache_enter(dvp, newvp, cnp); |
1002 | } |
1003 | *vpp = newvp; |
1004 | nfsm_reqdone; |
1005 | if (error) { |
1006 | /* |
1007 | * We get here only because of errors returned by |
1008 | * the RPC. Otherwise we'll have returned above |
1009 | * (the nfsm_* macros will jump to nfsm_reqdone |
1010 | * on error). |
1011 | */ |
1012 | if (error == ENOENT && cnp->cn_nameiop != CREATE) { |
1013 | nfs_cache_enter(dvp, NULL, cnp); |
1014 | } |
1015 | if (newvp != NULLVP) { |
1016 | if (newvp == dvp) { |
1017 | vrele(newvp); |
1018 | } else { |
1019 | vput(newvp); |
1020 | } |
1021 | } |
1022 | noentry: |
1023 | if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && |
1024 | (flags & ISLASTCN) && error == ENOENT) { |
1025 | if (dvp->v_mount->mnt_flag & MNT_RDONLY) { |
1026 | error = EROFS; |
1027 | } else { |
1028 | error = EJUSTRETURN; |
1029 | } |
1030 | } |
1031 | *vpp = NULL; |
1032 | return error; |
1033 | } |
1034 | |
1035 | validate: |
1036 | /* |
1037 | * make sure we have valid type and size. |
1038 | */ |
1039 | |
1040 | newvp = *vpp; |
1041 | if (newvp->v_type == VNON) { |
1042 | struct vattr vattr; /* dummy */ |
1043 | |
1044 | KASSERT(VTONFS(newvp)->n_attrstamp == 0); |
1045 | error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred); |
1046 | if (error) { |
1047 | vput(newvp); |
1048 | *vpp = NULL; |
1049 | } |
1050 | } |
1051 | if (error) |
1052 | return error; |
1053 | if (newvp != dvp) |
1054 | VOP_UNLOCK(newvp); |
1055 | return 0; |
1056 | } |
1057 | |
1058 | /* |
1059 | * nfs read call. |
1060 | * Just call nfs_bioread() to do the work. |
1061 | */ |
1062 | int |
1063 | nfs_read(void *v) |
1064 | { |
1065 | struct vop_read_args /* { |
1066 | struct vnode *a_vp; |
1067 | struct uio *a_uio; |
1068 | int a_ioflag; |
1069 | kauth_cred_t a_cred; |
1070 | } */ *ap = v; |
1071 | struct vnode *vp = ap->a_vp; |
1072 | |
1073 | if (vp->v_type != VREG) |
1074 | return EISDIR; |
1075 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); |
1076 | } |
1077 | |
1078 | /* |
1079 | * nfs readlink call |
1080 | */ |
1081 | int |
1082 | nfs_readlink(void *v) |
1083 | { |
1084 | struct vop_readlink_args /* { |
1085 | struct vnode *a_vp; |
1086 | struct uio *a_uio; |
1087 | kauth_cred_t a_cred; |
1088 | } */ *ap = v; |
1089 | struct vnode *vp = ap->a_vp; |
1090 | struct nfsnode *np = VTONFS(vp); |
1091 | |
1092 | if (vp->v_type != VLNK) |
1093 | return (EPERM); |
1094 | |
1095 | if (np->n_rcred != NULL) { |
1096 | kauth_cred_free(np->n_rcred); |
1097 | } |
1098 | np->n_rcred = ap->a_cred; |
1099 | kauth_cred_hold(np->n_rcred); |
1100 | |
1101 | return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); |
1102 | } |
1103 | |
1104 | /* |
1105 | * Do a readlink rpc. |
1106 | * Called by nfs_doio() from below the buffer cache. |
1107 | */ |
1108 | int |
1109 | nfs_readlinkrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) |
1110 | { |
1111 | u_int32_t *tl; |
1112 | char *cp; |
1113 | int32_t t1, t2; |
1114 | char *bpos, *dpos, *cp2; |
1115 | int error = 0; |
1116 | uint32_t len; |
1117 | struct mbuf *mreq, *mrep, *md, *mb; |
1118 | const int v3 = NFS_ISV3(vp); |
1119 | struct nfsnode *np = VTONFS(vp); |
1120 | #ifndef NFS_V2_ONLY |
1121 | int attrflag; |
1122 | #endif |
1123 | |
1124 | nfsstats.rpccnt[NFSPROC_READLINK]++; |
1125 | nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); |
1126 | nfsm_fhtom(np, v3); |
1127 | nfsm_request(np, NFSPROC_READLINK, curlwp, cred); |
1128 | #ifndef NFS_V2_ONLY |
1129 | if (v3) |
1130 | nfsm_postop_attr(vp, attrflag, 0); |
1131 | #endif |
1132 | if (!error) { |
1133 | #ifndef NFS_V2_ONLY |
1134 | if (v3) { |
1135 | nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); |
1136 | len = fxdr_unsigned(uint32_t, *tl); |
1137 | if (len > NFS_MAXPATHLEN) { |
1138 | /* |
1139 | * this pathname is too long for us. |
1140 | */ |
1141 | m_freem(mrep); |
1142 | /* Solaris returns EINVAL. should we follow? */ |
1143 | error = ENAMETOOLONG; |
1144 | goto nfsmout; |
1145 | } |
1146 | } else |
1147 | #endif |
1148 | { |
1149 | nfsm_strsiz(len, NFS_MAXPATHLEN); |
1150 | } |
1151 | nfsm_mtouio(uiop, len); |
1152 | } |
1153 | nfsm_reqdone; |
1154 | return (error); |
1155 | } |
1156 | |
1157 | /* |
1158 | * nfs read rpc call |
1159 | * Ditto above |
1160 | */ |
1161 | int |
1162 | nfs_readrpc(struct vnode *vp, struct uio *uiop) |
1163 | { |
1164 | u_int32_t *tl; |
1165 | char *cp; |
1166 | int32_t t1, t2; |
1167 | char *bpos, *dpos, *cp2; |
1168 | struct mbuf *mreq, *mrep, *md, *mb; |
1169 | struct nfsmount *nmp; |
1170 | int error = 0, len, retlen, tsiz, eof __unused, byte_count; |
1171 | const int v3 = NFS_ISV3(vp); |
1172 | struct nfsnode *np = VTONFS(vp); |
1173 | #ifndef NFS_V2_ONLY |
1174 | int attrflag; |
1175 | #endif |
1176 | |
1177 | #ifndef nolint |
1178 | eof = 0; |
1179 | #endif |
1180 | nmp = VFSTONFS(vp->v_mount); |
1181 | tsiz = uiop->uio_resid; |
1182 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
1183 | return (EFBIG); |
1184 | iostat_busy(nmp->nm_stats); |
1185 | byte_count = 0; /* count bytes actually transferred */ |
1186 | while (tsiz > 0) { |
1187 | nfsstats.rpccnt[NFSPROC_READ]++; |
1188 | len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; |
1189 | nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); |
1190 | nfsm_fhtom(np, v3); |
1191 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); |
1192 | #ifndef NFS_V2_ONLY |
1193 | if (v3) { |
1194 | txdr_hyper(uiop->uio_offset, tl); |
1195 | *(tl + 2) = txdr_unsigned(len); |
1196 | } else |
1197 | #endif |
1198 | { |
1199 | *tl++ = txdr_unsigned(uiop->uio_offset); |
1200 | *tl++ = txdr_unsigned(len); |
1201 | *tl = 0; |
1202 | } |
1203 | nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); |
1204 | #ifndef NFS_V2_ONLY |
1205 | if (v3) { |
1206 | nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); |
1207 | if (error) { |
1208 | m_freem(mrep); |
1209 | goto nfsmout; |
1210 | } |
1211 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
1212 | eof = fxdr_unsigned(int, *(tl + 1)); |
1213 | } else |
1214 | #endif |
1215 | nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); |
1216 | nfsm_strsiz(retlen, nmp->nm_rsize); |
1217 | nfsm_mtouio(uiop, retlen); |
1218 | m_freem(mrep); |
1219 | tsiz -= retlen; |
1220 | byte_count += retlen; |
1221 | #ifndef NFS_V2_ONLY |
1222 | if (v3) { |
1223 | if (eof || retlen == 0) |
1224 | tsiz = 0; |
1225 | } else |
1226 | #endif |
1227 | if (retlen < len) |
1228 | tsiz = 0; |
1229 | } |
1230 | nfsmout: |
1231 | iostat_unbusy(nmp->nm_stats, byte_count, 1); |
1232 | return (error); |
1233 | } |
1234 | |
1235 | struct nfs_writerpc_context { |
1236 | kmutex_t nwc_lock; |
1237 | kcondvar_t nwc_cv; |
1238 | int nwc_mbufcount; |
1239 | }; |
1240 | |
1241 | /* |
1242 | * free mbuf used to refer protected pages while write rpc call. |
1243 | * called at splvm. |
1244 | */ |
1245 | static void |
1246 | nfs_writerpc_extfree(struct mbuf *m, void *tbuf, size_t size, void *arg) |
1247 | { |
1248 | struct nfs_writerpc_context *ctx = arg; |
1249 | |
1250 | KASSERT(m != NULL); |
1251 | KASSERT(ctx != NULL); |
1252 | pool_cache_put(mb_cache, m); |
1253 | mutex_enter(&ctx->nwc_lock); |
1254 | if (--ctx->nwc_mbufcount == 0) { |
1255 | cv_signal(&ctx->nwc_cv); |
1256 | } |
1257 | mutex_exit(&ctx->nwc_lock); |
1258 | } |
1259 | |
1260 | /* |
1261 | * nfs write call |
1262 | */ |
1263 | int |
1264 | nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, bool pageprotected, bool *stalewriteverfp) |
1265 | { |
1266 | u_int32_t *tl; |
1267 | char *cp; |
1268 | int32_t t1, t2; |
1269 | char *bpos, *dpos; |
1270 | struct mbuf *mreq, *mrep, *md, *mb; |
1271 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
1272 | int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; |
1273 | const int v3 = NFS_ISV3(vp); |
1274 | int committed = NFSV3WRITE_FILESYNC; |
1275 | struct nfsnode *np = VTONFS(vp); |
1276 | struct nfs_writerpc_context ctx; |
1277 | int byte_count; |
1278 | size_t origresid; |
1279 | #ifndef NFS_V2_ONLY |
1280 | char *cp2; |
1281 | int rlen, commit; |
1282 | #endif |
1283 | |
1284 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
1285 | panic("writerpc readonly vp %p" , vp); |
1286 | } |
1287 | |
1288 | #ifdef DIAGNOSTIC |
1289 | if (uiop->uio_iovcnt != 1) |
1290 | panic("nfs: writerpc iovcnt > 1" ); |
1291 | #endif |
1292 | tsiz = uiop->uio_resid; |
1293 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
1294 | return EFBIG; |
1295 | |
1296 | mutex_init(&ctx.nwc_lock, MUTEX_DRIVER, IPL_VM); |
1297 | cv_init(&ctx.nwc_cv, "nfsmblk" ); |
1298 | ctx.nwc_mbufcount = 1; |
1299 | |
1300 | retry: |
1301 | origresid = uiop->uio_resid; |
1302 | KASSERT(origresid == uiop->uio_iov->iov_len); |
1303 | iostat_busy(nmp->nm_stats); |
1304 | byte_count = 0; /* count of bytes actually written */ |
1305 | while (tsiz > 0) { |
1306 | uint32_t datalen; /* data bytes need to be allocated in mbuf */ |
1307 | size_t backup; |
1308 | bool stalewriteverf = false; |
1309 | |
1310 | nfsstats.rpccnt[NFSPROC_WRITE]++; |
1311 | len = min(tsiz, nmp->nm_wsize); |
1312 | datalen = pageprotected ? 0 : nfsm_rndup(len); |
1313 | nfsm_reqhead(np, NFSPROC_WRITE, |
1314 | NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); |
1315 | nfsm_fhtom(np, v3); |
1316 | #ifndef NFS_V2_ONLY |
1317 | if (v3) { |
1318 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
1319 | txdr_hyper(uiop->uio_offset, tl); |
1320 | tl += 2; |
1321 | *tl++ = txdr_unsigned(len); |
1322 | *tl++ = txdr_unsigned(*iomode); |
1323 | *tl = txdr_unsigned(len); |
1324 | } else |
1325 | #endif |
1326 | { |
1327 | u_int32_t x; |
1328 | |
1329 | nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); |
1330 | /* Set both "begin" and "current" to non-garbage. */ |
1331 | x = txdr_unsigned((u_int32_t)uiop->uio_offset); |
1332 | *tl++ = x; /* "begin offset" */ |
1333 | *tl++ = x; /* "current offset" */ |
1334 | x = txdr_unsigned(len); |
1335 | *tl++ = x; /* total to this offset */ |
1336 | *tl = x; /* size of this write */ |
1337 | |
1338 | } |
1339 | if (pageprotected) { |
1340 | /* |
1341 | * since we know pages can't be modified during i/o, |
1342 | * no need to copy them for us. |
1343 | */ |
1344 | struct mbuf *m; |
1345 | struct iovec *iovp = uiop->uio_iov; |
1346 | |
1347 | m = m_get(M_WAIT, MT_DATA); |
1348 | MCLAIM(m, &nfs_mowner); |
1349 | MEXTADD(m, iovp->iov_base, len, M_MBUF, |
1350 | nfs_writerpc_extfree, &ctx); |
1351 | m->m_flags |= M_EXT_ROMAP; |
1352 | m->m_len = len; |
1353 | mb->m_next = m; |
1354 | /* |
1355 | * no need to maintain mb and bpos here |
1356 | * because no one care them later. |
1357 | */ |
1358 | #if 0 |
1359 | mb = m; |
1360 | bpos = mtod(void *, mb) + mb->m_len; |
1361 | #endif |
1362 | UIO_ADVANCE(uiop, len); |
1363 | uiop->uio_offset += len; |
1364 | mutex_enter(&ctx.nwc_lock); |
1365 | ctx.nwc_mbufcount++; |
1366 | mutex_exit(&ctx.nwc_lock); |
1367 | nfs_zeropad(mb, 0, nfsm_padlen(len)); |
1368 | } else { |
1369 | nfsm_uiotom(uiop, len); |
1370 | } |
1371 | nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); |
1372 | #ifndef NFS_V2_ONLY |
1373 | if (v3) { |
1374 | wccflag = NFSV3_WCCCHK; |
1375 | nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); |
1376 | if (!error) { |
1377 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED |
1378 | + NFSX_V3WRITEVERF); |
1379 | rlen = fxdr_unsigned(int, *tl++); |
1380 | if (rlen == 0) { |
1381 | error = NFSERR_IO; |
1382 | m_freem(mrep); |
1383 | break; |
1384 | } else if (rlen < len) { |
1385 | backup = len - rlen; |
1386 | UIO_ADVANCE(uiop, -backup); |
1387 | uiop->uio_offset -= backup; |
1388 | len = rlen; |
1389 | } |
1390 | commit = fxdr_unsigned(int, *tl++); |
1391 | |
1392 | /* |
1393 | * Return the lowest committment level |
1394 | * obtained by any of the RPCs. |
1395 | */ |
1396 | if (committed == NFSV3WRITE_FILESYNC) |
1397 | committed = commit; |
1398 | else if (committed == NFSV3WRITE_DATASYNC && |
1399 | commit == NFSV3WRITE_UNSTABLE) |
1400 | committed = commit; |
1401 | mutex_enter(&nmp->nm_lock); |
1402 | if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ |
1403 | memcpy(nmp->nm_writeverf, tl, |
1404 | NFSX_V3WRITEVERF); |
1405 | nmp->nm_iflag |= NFSMNT_HASWRITEVERF; |
1406 | } else if ((nmp->nm_iflag & |
1407 | NFSMNT_STALEWRITEVERF) || |
1408 | memcmp(tl, nmp->nm_writeverf, |
1409 | NFSX_V3WRITEVERF)) { |
1410 | memcpy(nmp->nm_writeverf, tl, |
1411 | NFSX_V3WRITEVERF); |
1412 | /* |
1413 | * note NFSMNT_STALEWRITEVERF |
1414 | * if we're the first thread to |
1415 | * notice it. |
1416 | */ |
1417 | if ((nmp->nm_iflag & |
1418 | NFSMNT_STALEWRITEVERF) == 0) { |
1419 | stalewriteverf = true; |
1420 | nmp->nm_iflag |= |
1421 | NFSMNT_STALEWRITEVERF; |
1422 | } |
1423 | } |
1424 | mutex_exit(&nmp->nm_lock); |
1425 | } |
1426 | } else |
1427 | #endif |
1428 | nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); |
1429 | if (wccflag) |
1430 | VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; |
1431 | m_freem(mrep); |
1432 | if (error) |
1433 | break; |
1434 | tsiz -= len; |
1435 | byte_count += len; |
1436 | if (stalewriteverf) { |
1437 | *stalewriteverfp = true; |
1438 | stalewriteverf = false; |
1439 | if (committed == NFSV3WRITE_UNSTABLE && |
1440 | len != origresid) { |
1441 | /* |
1442 | * if our write requests weren't atomic but |
1443 | * unstable, datas in previous iterations |
1444 | * might have already been lost now. |
1445 | * then, we should resend them to nfsd. |
1446 | */ |
1447 | backup = origresid - tsiz; |
1448 | UIO_ADVANCE(uiop, -backup); |
1449 | uiop->uio_offset -= backup; |
1450 | tsiz = origresid; |
1451 | goto retry; |
1452 | } |
1453 | } |
1454 | } |
1455 | nfsmout: |
1456 | iostat_unbusy(nmp->nm_stats, byte_count, 0); |
1457 | if (pageprotected) { |
1458 | /* |
1459 | * wait until mbufs go away. |
1460 | * retransmitted mbufs can survive longer than rpc requests |
1461 | * themselves. |
1462 | */ |
1463 | mutex_enter(&ctx.nwc_lock); |
1464 | ctx.nwc_mbufcount--; |
1465 | while (ctx.nwc_mbufcount > 0) { |
1466 | cv_wait(&ctx.nwc_cv, &ctx.nwc_lock); |
1467 | } |
1468 | mutex_exit(&ctx.nwc_lock); |
1469 | } |
1470 | mutex_destroy(&ctx.nwc_lock); |
1471 | cv_destroy(&ctx.nwc_cv); |
1472 | *iomode = committed; |
1473 | if (error) |
1474 | uiop->uio_resid = tsiz; |
1475 | return (error); |
1476 | } |
1477 | |
1478 | /* |
1479 | * nfs mknod rpc |
1480 | * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the |
1481 | * mode set to specify the file type and the size field for rdev. |
1482 | */ |
1483 | int |
1484 | nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, struct vattr *vap) |
1485 | { |
1486 | struct nfsv2_sattr *sp; |
1487 | u_int32_t *tl; |
1488 | char *cp; |
1489 | int32_t t1, t2; |
1490 | struct vnode *newvp = (struct vnode *)0; |
1491 | struct nfsnode *dnp, *np; |
1492 | char *cp2; |
1493 | char *bpos, *dpos; |
1494 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
1495 | struct mbuf *mreq, *mrep, *md, *mb; |
1496 | u_int32_t rdev; |
1497 | const int v3 = NFS_ISV3(dvp); |
1498 | |
1499 | if (vap->va_type == VCHR || vap->va_type == VBLK) |
1500 | rdev = txdr_unsigned(vap->va_rdev); |
1501 | else if (vap->va_type == VFIFO || vap->va_type == VSOCK) |
1502 | rdev = nfs_xdrneg1; |
1503 | else { |
1504 | VOP_ABORTOP(dvp, cnp); |
1505 | return (EOPNOTSUPP); |
1506 | } |
1507 | nfsstats.rpccnt[NFSPROC_MKNOD]++; |
1508 | dnp = VTONFS(dvp); |
1509 | nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + |
1510 | + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
1511 | nfsm_fhtom(dnp, v3); |
1512 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
1513 | #ifndef NFS_V2_ONLY |
1514 | if (v3) { |
1515 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
1516 | *tl++ = vtonfsv3_type(vap->va_type); |
1517 | nfsm_v3attrbuild(vap, false); |
1518 | if (vap->va_type == VCHR || vap->va_type == VBLK) { |
1519 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
1520 | *tl++ = txdr_unsigned(major(vap->va_rdev)); |
1521 | *tl = txdr_unsigned(minor(vap->va_rdev)); |
1522 | } |
1523 | } else |
1524 | #endif |
1525 | { |
1526 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
1527 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
1528 | sp->sa_uid = nfs_xdrneg1; |
1529 | sp->sa_gid = nfs_xdrneg1; |
1530 | sp->sa_size = rdev; |
1531 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
1532 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
1533 | } |
1534 | nfsm_request(dnp, NFSPROC_MKNOD, curlwp, cnp->cn_cred); |
1535 | if (!error) { |
1536 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
1537 | if (!gotvp) { |
1538 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
1539 | cnp->cn_namelen, cnp->cn_cred, curlwp, &np); |
1540 | if (!error) |
1541 | newvp = NFSTOV(np); |
1542 | } |
1543 | } |
1544 | #ifndef NFS_V2_ONLY |
1545 | if (v3) |
1546 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
1547 | #endif |
1548 | nfsm_reqdone; |
1549 | if (error) { |
1550 | if (newvp) |
1551 | vput(newvp); |
1552 | } else { |
1553 | nfs_cache_enter(dvp, newvp, cnp); |
1554 | *vpp = newvp; |
1555 | VOP_UNLOCK(newvp); |
1556 | } |
1557 | VTONFS(dvp)->n_flag |= NMODIFIED; |
1558 | if (!wccflag) |
1559 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
1560 | return (error); |
1561 | } |
1562 | |
1563 | /* |
1564 | * nfs mknod vop |
1565 | * just call nfs_mknodrpc() to do the work. |
1566 | */ |
1567 | /* ARGSUSED */ |
1568 | int |
1569 | nfs_mknod(void *v) |
1570 | { |
1571 | struct vop_mknod_v3_args /* { |
1572 | struct vnode *a_dvp; |
1573 | struct vnode **a_vpp; |
1574 | struct componentname *a_cnp; |
1575 | struct vattr *a_vap; |
1576 | } */ *ap = v; |
1577 | struct vnode *dvp = ap->a_dvp; |
1578 | struct componentname *cnp = ap->a_cnp; |
1579 | int error; |
1580 | |
1581 | error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); |
1582 | VN_KNOTE(dvp, NOTE_WRITE); |
1583 | if (error == 0 || error == EEXIST) |
1584 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
1585 | return (error); |
1586 | } |
1587 | |
1588 | /* |
1589 | * nfs file create call |
1590 | */ |
1591 | int |
1592 | nfs_create(void *v) |
1593 | { |
1594 | struct vop_create_v3_args /* { |
1595 | struct vnode *a_dvp; |
1596 | struct vnode **a_vpp; |
1597 | struct componentname *a_cnp; |
1598 | struct vattr *a_vap; |
1599 | } */ *ap = v; |
1600 | struct vnode *dvp = ap->a_dvp; |
1601 | struct vattr *vap = ap->a_vap; |
1602 | struct componentname *cnp = ap->a_cnp; |
1603 | struct nfsv2_sattr *sp; |
1604 | u_int32_t *tl; |
1605 | char *cp; |
1606 | int32_t t1, t2; |
1607 | struct nfsnode *dnp, *np = (struct nfsnode *)0; |
1608 | struct vnode *newvp = (struct vnode *)0; |
1609 | char *bpos, *dpos, *cp2; |
1610 | int error, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
1611 | struct mbuf *mreq, *mrep, *md, *mb; |
1612 | const int v3 = NFS_ISV3(dvp); |
1613 | u_int32_t excl_mode = NFSV3CREATE_UNCHECKED; |
1614 | |
1615 | /* |
1616 | * Oops, not for me.. |
1617 | */ |
1618 | if (vap->va_type == VSOCK) |
1619 | return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); |
1620 | |
1621 | KASSERT(vap->va_type == VREG); |
1622 | |
1623 | #ifdef VA_EXCLUSIVE |
1624 | if (vap->va_vaflags & VA_EXCLUSIVE) { |
1625 | excl_mode = NFSV3CREATE_EXCLUSIVE; |
1626 | } |
1627 | #endif |
1628 | again: |
1629 | error = 0; |
1630 | nfsstats.rpccnt[NFSPROC_CREATE]++; |
1631 | dnp = VTONFS(dvp); |
1632 | nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + |
1633 | nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
1634 | nfsm_fhtom(dnp, v3); |
1635 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
1636 | #ifndef NFS_V2_ONLY |
1637 | if (v3) { |
1638 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
1639 | if (excl_mode == NFSV3CREATE_EXCLUSIVE) { |
1640 | *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); |
1641 | nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); |
1642 | *tl++ = cprng_fast32(); |
1643 | *tl = cprng_fast32(); |
1644 | } else { |
1645 | *tl = txdr_unsigned(excl_mode); |
1646 | nfsm_v3attrbuild(vap, false); |
1647 | } |
1648 | } else |
1649 | #endif |
1650 | { |
1651 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
1652 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
1653 | sp->sa_uid = nfs_xdrneg1; |
1654 | sp->sa_gid = nfs_xdrneg1; |
1655 | sp->sa_size = 0; |
1656 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
1657 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
1658 | } |
1659 | nfsm_request(dnp, NFSPROC_CREATE, curlwp, cnp->cn_cred); |
1660 | if (!error) { |
1661 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
1662 | if (!gotvp) { |
1663 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
1664 | cnp->cn_namelen, cnp->cn_cred, curlwp, &np); |
1665 | if (!error) |
1666 | newvp = NFSTOV(np); |
1667 | } |
1668 | } |
1669 | #ifndef NFS_V2_ONLY |
1670 | if (v3) |
1671 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
1672 | #endif |
1673 | nfsm_reqdone; |
1674 | if (error) { |
1675 | /* |
1676 | * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. |
1677 | */ |
1678 | if (v3 && error == ENOTSUP) { |
1679 | if (excl_mode == NFSV3CREATE_EXCLUSIVE) { |
1680 | excl_mode = NFSV3CREATE_GUARDED; |
1681 | goto again; |
1682 | } else if (excl_mode == NFSV3CREATE_GUARDED) { |
1683 | excl_mode = NFSV3CREATE_UNCHECKED; |
1684 | goto again; |
1685 | } |
1686 | } |
1687 | } else if (v3 && (excl_mode == NFSV3CREATE_EXCLUSIVE)) { |
1688 | struct timespec ts; |
1689 | |
1690 | getnanotime(&ts); |
1691 | |
1692 | /* |
1693 | * make sure that we'll update timestamps as |
1694 | * most server implementations use them to store |
1695 | * the create verifier. |
1696 | * |
1697 | * XXX it's better to use TOSERVER always. |
1698 | */ |
1699 | |
1700 | if (vap->va_atime.tv_sec == VNOVAL) |
1701 | vap->va_atime = ts; |
1702 | if (vap->va_mtime.tv_sec == VNOVAL) |
1703 | vap->va_mtime = ts; |
1704 | |
1705 | error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, curlwp); |
1706 | } |
1707 | if (error == 0) { |
1708 | if (cnp->cn_flags & MAKEENTRY) |
1709 | nfs_cache_enter(dvp, newvp, cnp); |
1710 | else |
1711 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
1712 | *ap->a_vpp = newvp; |
1713 | VOP_UNLOCK(newvp); |
1714 | } else { |
1715 | if (newvp) |
1716 | vput(newvp); |
1717 | if (error == EEXIST) |
1718 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
1719 | } |
1720 | VTONFS(dvp)->n_flag |= NMODIFIED; |
1721 | if (!wccflag) |
1722 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
1723 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
1724 | return (error); |
1725 | } |
1726 | |
1727 | /* |
1728 | * nfs file remove call |
1729 | * To try and make nfs semantics closer to ufs semantics, a file that has |
1730 | * other processes using the vnode is renamed instead of removed and then |
1731 | * removed later on the last close. |
1732 | * - If v_usecount > 1 |
1733 | * If a rename is not already in the works |
1734 | * call nfs_sillyrename() to set it up |
1735 | * else |
1736 | * do the remove rpc |
1737 | */ |
1738 | int |
1739 | nfs_remove(void *v) |
1740 | { |
1741 | struct vop_remove_args /* { |
1742 | struct vnodeop_desc *a_desc; |
1743 | struct vnode * a_dvp; |
1744 | struct vnode * a_vp; |
1745 | struct componentname * a_cnp; |
1746 | } */ *ap = v; |
1747 | struct vnode *vp = ap->a_vp; |
1748 | struct vnode *dvp = ap->a_dvp; |
1749 | struct componentname *cnp = ap->a_cnp; |
1750 | struct nfsnode *np = VTONFS(vp); |
1751 | int error = 0; |
1752 | struct vattr vattr; |
1753 | |
1754 | #ifndef DIAGNOSTIC |
1755 | if (vp->v_usecount < 1) |
1756 | panic("nfs_remove: bad v_usecount" ); |
1757 | #endif |
1758 | if (vp->v_type == VDIR) |
1759 | error = EPERM; |
1760 | else if (vp->v_usecount == 1 || (np->n_sillyrename && |
1761 | VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && |
1762 | vattr.va_nlink > 1)) { |
1763 | /* |
1764 | * Purge the name cache so that the chance of a lookup for |
1765 | * the name succeeding while the remove is in progress is |
1766 | * minimized. Without node locking it can still happen, such |
1767 | * that an I/O op returns ESTALE, but since you get this if |
1768 | * another host removes the file.. |
1769 | */ |
1770 | cache_purge(vp); |
1771 | /* |
1772 | * throw away biocache buffers, mainly to avoid |
1773 | * unnecessary delayed writes later. |
1774 | */ |
1775 | error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, curlwp, 1); |
1776 | /* Do the rpc */ |
1777 | if (error != EINTR) |
1778 | error = nfs_removerpc(dvp, cnp->cn_nameptr, |
1779 | cnp->cn_namelen, cnp->cn_cred, curlwp); |
1780 | } else if (!np->n_sillyrename) |
1781 | error = nfs_sillyrename(dvp, vp, cnp, false); |
1782 | if (!error && nfs_getattrcache(vp, &vattr) == 0 && |
1783 | vattr.va_nlink == 1) { |
1784 | np->n_flag |= NREMOVED; |
1785 | } |
1786 | NFS_INVALIDATE_ATTRCACHE(np); |
1787 | VN_KNOTE(vp, NOTE_DELETE); |
1788 | VN_KNOTE(dvp, NOTE_WRITE); |
1789 | if (dvp == vp) |
1790 | vrele(vp); |
1791 | else |
1792 | vput(vp); |
1793 | vput(dvp); |
1794 | return (error); |
1795 | } |
1796 | |
1797 | /* |
1798 | * nfs file remove rpc called from nfs_inactive |
1799 | */ |
1800 | int |
1801 | nfs_removeit(struct sillyrename *sp) |
1802 | { |
1803 | |
1804 | return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
1805 | (struct lwp *)0)); |
1806 | } |
1807 | |
1808 | /* |
1809 | * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). |
1810 | */ |
1811 | int |
1812 | nfs_removerpc(struct vnode *dvp, const char *name, int namelen, kauth_cred_t cred, struct lwp *l) |
1813 | { |
1814 | u_int32_t *tl; |
1815 | char *cp; |
1816 | #ifndef NFS_V2_ONLY |
1817 | int32_t t1; |
1818 | char *cp2; |
1819 | #endif |
1820 | int32_t t2; |
1821 | char *bpos, *dpos; |
1822 | int error = 0, wccflag = NFSV3_WCCRATTR; |
1823 | struct mbuf *mreq, *mrep, *md, *mb; |
1824 | const int v3 = NFS_ISV3(dvp); |
1825 | int rexmit = 0; |
1826 | struct nfsnode *dnp = VTONFS(dvp); |
1827 | |
1828 | nfsstats.rpccnt[NFSPROC_REMOVE]++; |
1829 | nfsm_reqhead(dnp, NFSPROC_REMOVE, |
1830 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); |
1831 | nfsm_fhtom(dnp, v3); |
1832 | nfsm_strtom(name, namelen, NFS_MAXNAMLEN); |
1833 | nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); |
1834 | #ifndef NFS_V2_ONLY |
1835 | if (v3) |
1836 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
1837 | #endif |
1838 | nfsm_reqdone; |
1839 | VTONFS(dvp)->n_flag |= NMODIFIED; |
1840 | if (!wccflag) |
1841 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
1842 | /* |
1843 | * Kludge City: If the first reply to the remove rpc is lost.. |
1844 | * the reply to the retransmitted request will be ENOENT |
1845 | * since the file was in fact removed |
1846 | * Therefore, we cheat and return success. |
1847 | */ |
1848 | if (rexmit && error == ENOENT) |
1849 | error = 0; |
1850 | return (error); |
1851 | } |
1852 | |
1853 | /* |
1854 | * nfs file rename call |
1855 | */ |
1856 | int |
1857 | nfs_rename(void *v) |
1858 | { |
1859 | struct vop_rename_args /* { |
1860 | struct vnode *a_fdvp; |
1861 | struct vnode *a_fvp; |
1862 | struct componentname *a_fcnp; |
1863 | struct vnode *a_tdvp; |
1864 | struct vnode *a_tvp; |
1865 | struct componentname *a_tcnp; |
1866 | } */ *ap = v; |
1867 | struct vnode *fvp = ap->a_fvp; |
1868 | struct vnode *tvp = ap->a_tvp; |
1869 | struct vnode *fdvp = ap->a_fdvp; |
1870 | struct vnode *tdvp = ap->a_tdvp; |
1871 | struct componentname *tcnp = ap->a_tcnp; |
1872 | struct componentname *fcnp = ap->a_fcnp; |
1873 | int error; |
1874 | |
1875 | /* Check for cross-device rename */ |
1876 | if ((fvp->v_mount != tdvp->v_mount) || |
1877 | (tvp && (fvp->v_mount != tvp->v_mount))) { |
1878 | error = EXDEV; |
1879 | goto out; |
1880 | } |
1881 | |
1882 | /* |
1883 | * If the tvp exists and is in use, sillyrename it before doing the |
1884 | * rename of the new file over it. |
1885 | * |
1886 | * Have sillyrename use link instead of rename if possible, |
1887 | * so that we don't lose the file if the rename fails, and so |
1888 | * that there's no window when the "to" file doesn't exist. |
1889 | */ |
1890 | if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && |
1891 | tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, true)) { |
1892 | VN_KNOTE(tvp, NOTE_DELETE); |
1893 | vput(tvp); |
1894 | tvp = NULL; |
1895 | } |
1896 | |
1897 | error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, |
1898 | tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, |
1899 | curlwp); |
1900 | |
1901 | VN_KNOTE(fdvp, NOTE_WRITE); |
1902 | VN_KNOTE(tdvp, NOTE_WRITE); |
1903 | if (error == 0 || error == EEXIST) { |
1904 | if (fvp->v_type == VDIR) |
1905 | cache_purge(fvp); |
1906 | else |
1907 | cache_purge1(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, |
1908 | 0); |
1909 | if (tvp != NULL && tvp->v_type == VDIR) |
1910 | cache_purge(tvp); |
1911 | else |
1912 | cache_purge1(tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, |
1913 | 0); |
1914 | } |
1915 | out: |
1916 | if (tdvp == tvp) |
1917 | vrele(tdvp); |
1918 | else |
1919 | vput(tdvp); |
1920 | if (tvp) |
1921 | vput(tvp); |
1922 | vrele(fdvp); |
1923 | vrele(fvp); |
1924 | return (error); |
1925 | } |
1926 | |
1927 | /* |
1928 | * nfs file rename rpc called from nfs_remove() above |
1929 | */ |
1930 | int |
1931 | nfs_renameit(struct vnode *sdvp, struct componentname *scnp, struct sillyrename *sp) |
1932 | { |
1933 | return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, |
1934 | sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, curlwp)); |
1935 | } |
1936 | |
1937 | /* |
1938 | * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). |
1939 | */ |
1940 | int |
1941 | nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, struct vnode *tdvp, const char *tnameptr, int tnamelen, kauth_cred_t cred, struct lwp *l) |
1942 | { |
1943 | u_int32_t *tl; |
1944 | char *cp; |
1945 | #ifndef NFS_V2_ONLY |
1946 | int32_t t1; |
1947 | char *cp2; |
1948 | #endif |
1949 | int32_t t2; |
1950 | char *bpos, *dpos; |
1951 | int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; |
1952 | struct mbuf *mreq, *mrep, *md, *mb; |
1953 | const int v3 = NFS_ISV3(fdvp); |
1954 | int rexmit = 0; |
1955 | struct nfsnode *fdnp = VTONFS(fdvp); |
1956 | |
1957 | nfsstats.rpccnt[NFSPROC_RENAME]++; |
1958 | nfsm_reqhead(fdnp, NFSPROC_RENAME, |
1959 | (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + |
1960 | nfsm_rndup(tnamelen)); |
1961 | nfsm_fhtom(fdnp, v3); |
1962 | nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); |
1963 | nfsm_fhtom(VTONFS(tdvp), v3); |
1964 | nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); |
1965 | nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); |
1966 | #ifndef NFS_V2_ONLY |
1967 | if (v3) { |
1968 | nfsm_wcc_data(fdvp, fwccflag, 0, !error); |
1969 | nfsm_wcc_data(tdvp, twccflag, 0, !error); |
1970 | } |
1971 | #endif |
1972 | nfsm_reqdone; |
1973 | VTONFS(fdvp)->n_flag |= NMODIFIED; |
1974 | VTONFS(tdvp)->n_flag |= NMODIFIED; |
1975 | if (!fwccflag) |
1976 | NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); |
1977 | if (!twccflag) |
1978 | NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); |
1979 | /* |
1980 | * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. |
1981 | */ |
1982 | if (rexmit && error == ENOENT) |
1983 | error = 0; |
1984 | return (error); |
1985 | } |
1986 | |
1987 | /* |
1988 | * NFS link RPC, called from nfs_link. |
1989 | * Assumes dvp and vp locked, and leaves them that way. |
1990 | */ |
1991 | |
1992 | static int |
1993 | nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, |
1994 | size_t namelen, kauth_cred_t cred, struct lwp *l) |
1995 | { |
1996 | u_int32_t *tl; |
1997 | char *cp; |
1998 | #ifndef NFS_V2_ONLY |
1999 | int32_t t1; |
2000 | char *cp2; |
2001 | #endif |
2002 | int32_t t2; |
2003 | char *bpos, *dpos; |
2004 | int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; |
2005 | struct mbuf *mreq, *mrep, *md, *mb; |
2006 | const int v3 = NFS_ISV3(dvp); |
2007 | int rexmit = 0; |
2008 | struct nfsnode *np = VTONFS(vp); |
2009 | |
2010 | nfsstats.rpccnt[NFSPROC_LINK]++; |
2011 | nfsm_reqhead(np, NFSPROC_LINK, |
2012 | NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); |
2013 | nfsm_fhtom(np, v3); |
2014 | nfsm_fhtom(VTONFS(dvp), v3); |
2015 | nfsm_strtom(name, namelen, NFS_MAXNAMLEN); |
2016 | nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); |
2017 | #ifndef NFS_V2_ONLY |
2018 | if (v3) { |
2019 | nfsm_postop_attr(vp, attrflag, 0); |
2020 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
2021 | } |
2022 | #endif |
2023 | nfsm_reqdone; |
2024 | |
2025 | VTONFS(dvp)->n_flag |= NMODIFIED; |
2026 | if (!attrflag) |
2027 | NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); |
2028 | if (!wccflag) |
2029 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
2030 | |
2031 | /* |
2032 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. |
2033 | */ |
2034 | if (rexmit && error == EEXIST) |
2035 | error = 0; |
2036 | |
2037 | return error; |
2038 | } |
2039 | |
2040 | /* |
2041 | * nfs hard link create call |
2042 | */ |
2043 | int |
2044 | nfs_link(void *v) |
2045 | { |
2046 | struct vop_link_v2_args /* { |
2047 | struct vnode *a_dvp; |
2048 | struct vnode *a_vp; |
2049 | struct componentname *a_cnp; |
2050 | } */ *ap = v; |
2051 | struct vnode *vp = ap->a_vp; |
2052 | struct vnode *dvp = ap->a_dvp; |
2053 | struct componentname *cnp = ap->a_cnp; |
2054 | int error = 0; |
2055 | |
2056 | error = vn_lock(vp, LK_EXCLUSIVE); |
2057 | if (error != 0) { |
2058 | VOP_ABORTOP(dvp, cnp); |
2059 | return error; |
2060 | } |
2061 | |
2062 | /* |
2063 | * Push all writes to the server, so that the attribute cache |
2064 | * doesn't get "out of sync" with the server. |
2065 | * XXX There should be a better way! |
2066 | */ |
2067 | VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0); |
2068 | |
2069 | error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, |
2070 | cnp->cn_cred, curlwp); |
2071 | |
2072 | if (error == 0) { |
2073 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
2074 | } |
2075 | VOP_UNLOCK(vp); |
2076 | VN_KNOTE(vp, NOTE_LINK); |
2077 | VN_KNOTE(dvp, NOTE_WRITE); |
2078 | return (error); |
2079 | } |
2080 | |
2081 | /* |
2082 | * nfs symbolic link create call |
2083 | */ |
2084 | int |
2085 | nfs_symlink(void *v) |
2086 | { |
2087 | struct vop_symlink_v3_args /* { |
2088 | struct vnode *a_dvp; |
2089 | struct vnode **a_vpp; |
2090 | struct componentname *a_cnp; |
2091 | struct vattr *a_vap; |
2092 | char *a_target; |
2093 | } */ *ap = v; |
2094 | struct vnode *dvp = ap->a_dvp; |
2095 | struct vattr *vap = ap->a_vap; |
2096 | struct componentname *cnp = ap->a_cnp; |
2097 | struct nfsv2_sattr *sp; |
2098 | u_int32_t *tl; |
2099 | char *cp; |
2100 | int32_t t1, t2; |
2101 | char *bpos, *dpos, *cp2; |
2102 | int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; |
2103 | struct mbuf *mreq, *mrep, *md, *mb; |
2104 | struct vnode *newvp = (struct vnode *)0; |
2105 | const int v3 = NFS_ISV3(dvp); |
2106 | int rexmit = 0; |
2107 | struct nfsnode *dnp = VTONFS(dvp); |
2108 | |
2109 | *ap->a_vpp = NULL; |
2110 | nfsstats.rpccnt[NFSPROC_SYMLINK]++; |
2111 | slen = strlen(ap->a_target); |
2112 | nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + |
2113 | nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); |
2114 | nfsm_fhtom(dnp, v3); |
2115 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
2116 | #ifndef NFS_V2_ONlY |
2117 | if (v3) |
2118 | nfsm_v3attrbuild(vap, false); |
2119 | #endif |
2120 | nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); |
2121 | #ifndef NFS_V2_ONlY |
2122 | if (!v3) { |
2123 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
2124 | sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); |
2125 | sp->sa_uid = nfs_xdrneg1; |
2126 | sp->sa_gid = nfs_xdrneg1; |
2127 | sp->sa_size = nfs_xdrneg1; |
2128 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
2129 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
2130 | } |
2131 | #endif |
2132 | nfsm_request1(dnp, NFSPROC_SYMLINK, curlwp, cnp->cn_cred, |
2133 | &rexmit); |
2134 | #ifndef NFS_V2_ONlY |
2135 | if (v3) { |
2136 | if (!error) |
2137 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
2138 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
2139 | } |
2140 | #endif |
2141 | nfsm_reqdone; |
2142 | /* |
2143 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. |
2144 | */ |
2145 | if (rexmit && error == EEXIST) |
2146 | error = 0; |
2147 | if (error == 0 || error == EEXIST) |
2148 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
2149 | if (error == 0 && newvp == NULL) { |
2150 | struct nfsnode *np = NULL; |
2151 | |
2152 | error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
2153 | cnp->cn_cred, curlwp, &np); |
2154 | if (error == 0) |
2155 | newvp = NFSTOV(np); |
2156 | } |
2157 | if (error) { |
2158 | if (newvp != NULL) |
2159 | vput(newvp); |
2160 | } else { |
2161 | *ap->a_vpp = newvp; |
2162 | VOP_UNLOCK(newvp); |
2163 | } |
2164 | VTONFS(dvp)->n_flag |= NMODIFIED; |
2165 | if (!wccflag) |
2166 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
2167 | VN_KNOTE(dvp, NOTE_WRITE); |
2168 | return (error); |
2169 | } |
2170 | |
2171 | /* |
2172 | * nfs make dir call |
2173 | */ |
2174 | int |
2175 | nfs_mkdir(void *v) |
2176 | { |
2177 | struct vop_mkdir_v3_args /* { |
2178 | struct vnode *a_dvp; |
2179 | struct vnode **a_vpp; |
2180 | struct componentname *a_cnp; |
2181 | struct vattr *a_vap; |
2182 | } */ *ap = v; |
2183 | struct vnode *dvp = ap->a_dvp; |
2184 | struct vattr *vap = ap->a_vap; |
2185 | struct componentname *cnp = ap->a_cnp; |
2186 | struct nfsv2_sattr *sp; |
2187 | u_int32_t *tl; |
2188 | char *cp; |
2189 | int32_t t1, t2; |
2190 | int len; |
2191 | struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; |
2192 | struct vnode *newvp = (struct vnode *)0; |
2193 | char *bpos, *dpos, *cp2; |
2194 | int error = 0, wccflag = NFSV3_WCCRATTR; |
2195 | int gotvp = 0; |
2196 | int rexmit = 0; |
2197 | struct mbuf *mreq, *mrep, *md, *mb; |
2198 | const int v3 = NFS_ISV3(dvp); |
2199 | |
2200 | len = cnp->cn_namelen; |
2201 | nfsstats.rpccnt[NFSPROC_MKDIR]++; |
2202 | nfsm_reqhead(dnp, NFSPROC_MKDIR, |
2203 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); |
2204 | nfsm_fhtom(dnp, v3); |
2205 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
2206 | #ifndef NFS_V2_ONLY |
2207 | if (v3) { |
2208 | nfsm_v3attrbuild(vap, false); |
2209 | } else |
2210 | #endif |
2211 | { |
2212 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
2213 | sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); |
2214 | sp->sa_uid = nfs_xdrneg1; |
2215 | sp->sa_gid = nfs_xdrneg1; |
2216 | sp->sa_size = nfs_xdrneg1; |
2217 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
2218 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
2219 | } |
2220 | nfsm_request1(dnp, NFSPROC_MKDIR, curlwp, cnp->cn_cred, &rexmit); |
2221 | if (!error) |
2222 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
2223 | if (v3) |
2224 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
2225 | nfsm_reqdone; |
2226 | VTONFS(dvp)->n_flag |= NMODIFIED; |
2227 | if (!wccflag) |
2228 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
2229 | /* |
2230 | * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry |
2231 | * if we can succeed in looking up the directory. |
2232 | */ |
2233 | if ((rexmit && error == EEXIST) || (!error && !gotvp)) { |
2234 | if (newvp) { |
2235 | vput(newvp); |
2236 | newvp = (struct vnode *)0; |
2237 | } |
2238 | error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, |
2239 | curlwp, &np); |
2240 | if (!error) { |
2241 | newvp = NFSTOV(np); |
2242 | if (newvp->v_type != VDIR || newvp == dvp) |
2243 | error = EEXIST; |
2244 | } |
2245 | } |
2246 | if (error) { |
2247 | if (newvp) { |
2248 | if (dvp != newvp) |
2249 | vput(newvp); |
2250 | else |
2251 | vrele(newvp); |
2252 | } |
2253 | } else { |
2254 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
2255 | nfs_cache_enter(dvp, newvp, cnp); |
2256 | *ap->a_vpp = newvp; |
2257 | VOP_UNLOCK(newvp); |
2258 | } |
2259 | return (error); |
2260 | } |
2261 | |
2262 | /* |
2263 | * nfs remove directory call |
2264 | */ |
2265 | int |
2266 | nfs_rmdir(void *v) |
2267 | { |
2268 | struct vop_rmdir_args /* { |
2269 | struct vnode *a_dvp; |
2270 | struct vnode *a_vp; |
2271 | struct componentname *a_cnp; |
2272 | } */ *ap = v; |
2273 | struct vnode *vp = ap->a_vp; |
2274 | struct vnode *dvp = ap->a_dvp; |
2275 | struct componentname *cnp = ap->a_cnp; |
2276 | u_int32_t *tl; |
2277 | char *cp; |
2278 | #ifndef NFS_V2_ONLY |
2279 | int32_t t1; |
2280 | char *cp2; |
2281 | #endif |
2282 | int32_t t2; |
2283 | char *bpos, *dpos; |
2284 | int error = 0, wccflag = NFSV3_WCCRATTR; |
2285 | int rexmit = 0; |
2286 | struct mbuf *mreq, *mrep, *md, *mb; |
2287 | const int v3 = NFS_ISV3(dvp); |
2288 | struct nfsnode *dnp; |
2289 | |
2290 | if (dvp == vp) { |
2291 | vrele(dvp); |
2292 | vput(dvp); |
2293 | return (EINVAL); |
2294 | } |
2295 | nfsstats.rpccnt[NFSPROC_RMDIR]++; |
2296 | dnp = VTONFS(dvp); |
2297 | nfsm_reqhead(dnp, NFSPROC_RMDIR, |
2298 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); |
2299 | nfsm_fhtom(dnp, v3); |
2300 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
2301 | nfsm_request1(dnp, NFSPROC_RMDIR, curlwp, cnp->cn_cred, &rexmit); |
2302 | #ifndef NFS_V2_ONLY |
2303 | if (v3) |
2304 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
2305 | #endif |
2306 | nfsm_reqdone; |
2307 | VTONFS(dvp)->n_flag |= NMODIFIED; |
2308 | if (!wccflag) |
2309 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
2310 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
2311 | VN_KNOTE(vp, NOTE_DELETE); |
2312 | cache_purge(vp); |
2313 | vput(vp); |
2314 | vput(dvp); |
2315 | /* |
2316 | * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. |
2317 | */ |
2318 | if (rexmit && error == ENOENT) |
2319 | error = 0; |
2320 | return (error); |
2321 | } |
2322 | |
2323 | /* |
2324 | * nfs readdir call |
2325 | */ |
2326 | int |
2327 | nfs_readdir(void *v) |
2328 | { |
2329 | struct vop_readdir_args /* { |
2330 | struct vnode *a_vp; |
2331 | struct uio *a_uio; |
2332 | kauth_cred_t a_cred; |
2333 | int *a_eofflag; |
2334 | off_t **a_cookies; |
2335 | int *a_ncookies; |
2336 | } */ *ap = v; |
2337 | struct vnode *vp = ap->a_vp; |
2338 | struct uio *uio = ap->a_uio; |
2339 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
2340 | char *base = uio->uio_iov->iov_base; |
2341 | int tresid, error; |
2342 | size_t count, lost; |
2343 | struct dirent *dp; |
2344 | off_t *cookies = NULL; |
2345 | int ncookies = 0, nc; |
2346 | |
2347 | if (vp->v_type != VDIR) |
2348 | return (EPERM); |
2349 | |
2350 | lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); |
2351 | count = uio->uio_resid - lost; |
2352 | if (count <= 0) |
2353 | return (EINVAL); |
2354 | |
2355 | /* |
2356 | * Call nfs_bioread() to do the real work. |
2357 | */ |
2358 | tresid = uio->uio_resid = count; |
2359 | error = nfs_bioread(vp, uio, 0, ap->a_cred, |
2360 | ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); |
2361 | |
2362 | if (!error && ap->a_cookies) { |
2363 | ncookies = count / 16; |
2364 | cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); |
2365 | *ap->a_cookies = cookies; |
2366 | } |
2367 | |
2368 | if (!error && uio->uio_resid == tresid) { |
2369 | uio->uio_resid += lost; |
2370 | nfsstats.direofcache_misses++; |
2371 | if (ap->a_cookies) |
2372 | *ap->a_ncookies = 0; |
2373 | *ap->a_eofflag = 1; |
2374 | return (0); |
2375 | } |
2376 | |
2377 | if (!error && ap->a_cookies) { |
2378 | /* |
2379 | * Only the NFS server and emulations use cookies, and they |
2380 | * load the directory block into system space, so we can |
2381 | * just look at it directly. |
2382 | */ |
2383 | if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || |
2384 | uio->uio_iovcnt != 1) |
2385 | panic("nfs_readdir: lost in space" ); |
2386 | for (nc = 0; ncookies-- && |
2387 | base < (char *)uio->uio_iov->iov_base; nc++){ |
2388 | dp = (struct dirent *) base; |
2389 | if (dp->d_reclen == 0) |
2390 | break; |
2391 | if (nmp->nm_flag & NFSMNT_XLATECOOKIE) |
2392 | *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); |
2393 | else |
2394 | *(cookies++) = NFS_GETCOOKIE(dp); |
2395 | base += dp->d_reclen; |
2396 | } |
2397 | uio->uio_resid += |
2398 | ((char *)uio->uio_iov->iov_base - base); |
2399 | uio->uio_iov->iov_len += |
2400 | ((char *)uio->uio_iov->iov_base - base); |
2401 | uio->uio_iov->iov_base = base; |
2402 | *ap->a_ncookies = nc; |
2403 | } |
2404 | |
2405 | uio->uio_resid += lost; |
2406 | *ap->a_eofflag = 0; |
2407 | return (error); |
2408 | } |
2409 | |
2410 | /* |
2411 | * Readdir rpc call. |
2412 | * Called from below the buffer cache by nfs_doio(). |
2413 | */ |
2414 | int |
2415 | nfs_readdirrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) |
2416 | { |
2417 | int len, left; |
2418 | struct dirent *dp = NULL; |
2419 | u_int32_t *tl; |
2420 | char *cp; |
2421 | int32_t t1, t2; |
2422 | char *bpos, *dpos, *cp2; |
2423 | struct mbuf *mreq, *mrep, *md, *mb; |
2424 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
2425 | struct nfsnode *dnp = VTONFS(vp); |
2426 | u_quad_t fileno; |
2427 | int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; |
2428 | #ifndef NFS_V2_ONLY |
2429 | int attrflag; |
2430 | #endif |
2431 | int nrpcs = 0, reclen; |
2432 | const int v3 = NFS_ISV3(vp); |
2433 | |
2434 | #ifdef DIAGNOSTIC |
2435 | /* |
2436 | * Should be called from buffer cache, so only amount of |
2437 | * NFS_DIRBLKSIZ will be requested. |
2438 | */ |
2439 | if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) |
2440 | panic("nfs readdirrpc bad uio" ); |
2441 | #endif |
2442 | |
2443 | /* |
2444 | * Loop around doing readdir rpc's of size nm_readdirsize |
2445 | * truncated to a multiple of NFS_DIRFRAGSIZ. |
2446 | * The stopping criteria is EOF or buffer full. |
2447 | */ |
2448 | while (more_dirs && bigenough) { |
2449 | /* |
2450 | * Heuristic: don't bother to do another RPC to further |
2451 | * fill up this block if there is not much room left. (< 50% |
2452 | * of the readdir RPC size). This wastes some buffer space |
2453 | * but can save up to 50% in RPC calls. |
2454 | */ |
2455 | if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { |
2456 | bigenough = 0; |
2457 | break; |
2458 | } |
2459 | nfsstats.rpccnt[NFSPROC_READDIR]++; |
2460 | nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + |
2461 | NFSX_READDIR(v3)); |
2462 | nfsm_fhtom(dnp, v3); |
2463 | #ifndef NFS_V2_ONLY |
2464 | if (v3) { |
2465 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
2466 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { |
2467 | txdr_swapcookie3(uiop->uio_offset, tl); |
2468 | } else { |
2469 | txdr_cookie3(uiop->uio_offset, tl); |
2470 | } |
2471 | tl += 2; |
2472 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
2473 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
2474 | } else |
2475 | #endif |
2476 | { |
2477 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
2478 | *tl++ = txdr_unsigned(uiop->uio_offset); |
2479 | } |
2480 | *tl = txdr_unsigned(nmp->nm_readdirsize); |
2481 | nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); |
2482 | nrpcs++; |
2483 | #ifndef NFS_V2_ONLY |
2484 | if (v3) { |
2485 | nfsm_postop_attr(vp, attrflag, 0); |
2486 | if (!error) { |
2487 | nfsm_dissect(tl, u_int32_t *, |
2488 | 2 * NFSX_UNSIGNED); |
2489 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
2490 | dnp->n_cookieverf.nfsuquad[1] = *tl; |
2491 | } else { |
2492 | m_freem(mrep); |
2493 | goto nfsmout; |
2494 | } |
2495 | } |
2496 | #endif |
2497 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
2498 | more_dirs = fxdr_unsigned(int, *tl); |
2499 | |
2500 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
2501 | while (more_dirs && bigenough) { |
2502 | #ifndef NFS_V2_ONLY |
2503 | if (v3) { |
2504 | nfsm_dissect(tl, u_int32_t *, |
2505 | 3 * NFSX_UNSIGNED); |
2506 | fileno = fxdr_hyper(tl); |
2507 | len = fxdr_unsigned(int, *(tl + 2)); |
2508 | } else |
2509 | #endif |
2510 | { |
2511 | nfsm_dissect(tl, u_int32_t *, |
2512 | 2 * NFSX_UNSIGNED); |
2513 | fileno = fxdr_unsigned(u_quad_t, *tl++); |
2514 | len = fxdr_unsigned(int, *tl); |
2515 | } |
2516 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
2517 | error = EBADRPC; |
2518 | m_freem(mrep); |
2519 | goto nfsmout; |
2520 | } |
2521 | /* for cookie stashing */ |
2522 | reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); |
2523 | left = NFS_DIRFRAGSIZ - blksiz; |
2524 | if (reclen > left) { |
2525 | memset(uiop->uio_iov->iov_base, 0, left); |
2526 | dp->d_reclen += left; |
2527 | UIO_ADVANCE(uiop, left); |
2528 | blksiz = 0; |
2529 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
2530 | } |
2531 | if (reclen > uiop->uio_resid) |
2532 | bigenough = 0; |
2533 | if (bigenough) { |
2534 | int tlen; |
2535 | |
2536 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
2537 | dp->d_fileno = fileno; |
2538 | dp->d_namlen = len; |
2539 | dp->d_reclen = reclen; |
2540 | dp->d_type = DT_UNKNOWN; |
2541 | blksiz += reclen; |
2542 | if (blksiz == NFS_DIRFRAGSIZ) |
2543 | blksiz = 0; |
2544 | UIO_ADVANCE(uiop, DIRHDSIZ); |
2545 | nfsm_mtouio(uiop, len); |
2546 | tlen = reclen - (DIRHDSIZ + len); |
2547 | (void)memset(uiop->uio_iov->iov_base, 0, tlen); |
2548 | UIO_ADVANCE(uiop, tlen); |
2549 | } else |
2550 | nfsm_adv(nfsm_rndup(len)); |
2551 | #ifndef NFS_V2_ONLY |
2552 | if (v3) { |
2553 | nfsm_dissect(tl, u_int32_t *, |
2554 | 3 * NFSX_UNSIGNED); |
2555 | } else |
2556 | #endif |
2557 | { |
2558 | nfsm_dissect(tl, u_int32_t *, |
2559 | 2 * NFSX_UNSIGNED); |
2560 | } |
2561 | if (bigenough) { |
2562 | #ifndef NFS_V2_ONLY |
2563 | if (v3) { |
2564 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) |
2565 | uiop->uio_offset = |
2566 | fxdr_swapcookie3(tl); |
2567 | else |
2568 | uiop->uio_offset = |
2569 | fxdr_cookie3(tl); |
2570 | } |
2571 | else |
2572 | #endif |
2573 | { |
2574 | uiop->uio_offset = |
2575 | fxdr_unsigned(off_t, *tl); |
2576 | } |
2577 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
2578 | } |
2579 | if (v3) |
2580 | tl += 2; |
2581 | else |
2582 | tl++; |
2583 | more_dirs = fxdr_unsigned(int, *tl); |
2584 | } |
2585 | /* |
2586 | * If at end of rpc data, get the eof boolean |
2587 | */ |
2588 | if (!more_dirs) { |
2589 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
2590 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
2591 | |
2592 | /* |
2593 | * kludge: if we got no entries, treat it as EOF. |
2594 | * some server sometimes send a reply without any |
2595 | * entries or EOF. |
2596 | * although it might mean the server has very long name, |
2597 | * we can't handle such entries anyway. |
2598 | */ |
2599 | |
2600 | if (uiop->uio_resid >= NFS_DIRBLKSIZ) |
2601 | more_dirs = 0; |
2602 | } |
2603 | m_freem(mrep); |
2604 | } |
2605 | /* |
2606 | * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ |
2607 | * by increasing d_reclen for the last record. |
2608 | */ |
2609 | if (blksiz > 0) { |
2610 | left = NFS_DIRFRAGSIZ - blksiz; |
2611 | memset(uiop->uio_iov->iov_base, 0, left); |
2612 | dp->d_reclen += left; |
2613 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
2614 | UIO_ADVANCE(uiop, left); |
2615 | } |
2616 | |
2617 | /* |
2618 | * We are now either at the end of the directory or have filled the |
2619 | * block. |
2620 | */ |
2621 | if (bigenough) { |
2622 | dnp->n_direofoffset = uiop->uio_offset; |
2623 | dnp->n_flag |= NEOFVALID; |
2624 | } |
2625 | nfsmout: |
2626 | return (error); |
2627 | } |
2628 | |
2629 | #ifndef NFS_V2_ONLY |
2630 | /* |
2631 | * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). |
2632 | */ |
2633 | int |
2634 | nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) |
2635 | { |
2636 | int len, left; |
2637 | struct dirent *dp = NULL; |
2638 | u_int32_t *tl; |
2639 | char *cp; |
2640 | int32_t t1, t2; |
2641 | struct vnode *newvp; |
2642 | char *bpos, *dpos, *cp2; |
2643 | struct mbuf *mreq, *mrep, *md, *mb; |
2644 | struct nameidata nami, *ndp = &nami; |
2645 | struct componentname *cnp = &ndp->ni_cnd; |
2646 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
2647 | struct nfsnode *dnp = VTONFS(vp), *np; |
2648 | nfsfh_t *fhp; |
2649 | u_quad_t fileno; |
2650 | int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; |
2651 | int attrflag, fhsize, nrpcs = 0, reclen; |
2652 | struct nfs_fattr fattr, *fp; |
2653 | |
2654 | #ifdef DIAGNOSTIC |
2655 | if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) |
2656 | panic("nfs readdirplusrpc bad uio" ); |
2657 | #endif |
2658 | ndp->ni_dvp = vp; |
2659 | newvp = NULLVP; |
2660 | |
2661 | /* |
2662 | * Loop around doing readdir rpc's of size nm_readdirsize |
2663 | * truncated to a multiple of NFS_DIRFRAGSIZ. |
2664 | * The stopping criteria is EOF or buffer full. |
2665 | */ |
2666 | while (more_dirs && bigenough) { |
2667 | if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { |
2668 | bigenough = 0; |
2669 | break; |
2670 | } |
2671 | nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; |
2672 | nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, |
2673 | NFSX_FH(1) + 6 * NFSX_UNSIGNED); |
2674 | nfsm_fhtom(dnp, 1); |
2675 | nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); |
2676 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { |
2677 | txdr_swapcookie3(uiop->uio_offset, tl); |
2678 | } else { |
2679 | txdr_cookie3(uiop->uio_offset, tl); |
2680 | } |
2681 | tl += 2; |
2682 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
2683 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
2684 | *tl++ = txdr_unsigned(nmp->nm_readdirsize); |
2685 | *tl = txdr_unsigned(nmp->nm_rsize); |
2686 | nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); |
2687 | nfsm_postop_attr(vp, attrflag, 0); |
2688 | if (error) { |
2689 | m_freem(mrep); |
2690 | goto nfsmout; |
2691 | } |
2692 | nrpcs++; |
2693 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
2694 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
2695 | dnp->n_cookieverf.nfsuquad[1] = *tl++; |
2696 | more_dirs = fxdr_unsigned(int, *tl); |
2697 | |
2698 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
2699 | while (more_dirs && bigenough) { |
2700 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
2701 | fileno = fxdr_hyper(tl); |
2702 | len = fxdr_unsigned(int, *(tl + 2)); |
2703 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
2704 | error = EBADRPC; |
2705 | m_freem(mrep); |
2706 | goto nfsmout; |
2707 | } |
2708 | /* for cookie stashing */ |
2709 | reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); |
2710 | left = NFS_DIRFRAGSIZ - blksiz; |
2711 | if (reclen > left) { |
2712 | /* |
2713 | * DIRFRAGSIZ is aligned, no need to align |
2714 | * again here. |
2715 | */ |
2716 | memset(uiop->uio_iov->iov_base, 0, left); |
2717 | dp->d_reclen += left; |
2718 | UIO_ADVANCE(uiop, left); |
2719 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
2720 | blksiz = 0; |
2721 | } |
2722 | if (reclen > uiop->uio_resid) |
2723 | bigenough = 0; |
2724 | if (bigenough) { |
2725 | int tlen; |
2726 | |
2727 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
2728 | dp->d_fileno = fileno; |
2729 | dp->d_namlen = len; |
2730 | dp->d_reclen = reclen; |
2731 | dp->d_type = DT_UNKNOWN; |
2732 | blksiz += reclen; |
2733 | if (blksiz == NFS_DIRFRAGSIZ) |
2734 | blksiz = 0; |
2735 | UIO_ADVANCE(uiop, DIRHDSIZ); |
2736 | nfsm_mtouio(uiop, len); |
2737 | tlen = reclen - (DIRHDSIZ + len); |
2738 | (void)memset(uiop->uio_iov->iov_base, 0, tlen); |
2739 | UIO_ADVANCE(uiop, tlen); |
2740 | cnp->cn_nameptr = dp->d_name; |
2741 | cnp->cn_namelen = dp->d_namlen; |
2742 | } else |
2743 | nfsm_adv(nfsm_rndup(len)); |
2744 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
2745 | if (bigenough) { |
2746 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) |
2747 | uiop->uio_offset = |
2748 | fxdr_swapcookie3(tl); |
2749 | else |
2750 | uiop->uio_offset = |
2751 | fxdr_cookie3(tl); |
2752 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
2753 | } |
2754 | tl += 2; |
2755 | |
2756 | /* |
2757 | * Since the attributes are before the file handle |
2758 | * (sigh), we must skip over the attributes and then |
2759 | * come back and get them. |
2760 | */ |
2761 | attrflag = fxdr_unsigned(int, *tl); |
2762 | if (attrflag) { |
2763 | nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); |
2764 | memcpy(&fattr, fp, NFSX_V3FATTR); |
2765 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
2766 | doit = fxdr_unsigned(int, *tl); |
2767 | if (doit) { |
2768 | nfsm_getfh(fhp, fhsize, 1); |
2769 | if (NFS_CMPFH(dnp, fhp, fhsize)) { |
2770 | vref(vp); |
2771 | newvp = vp; |
2772 | np = dnp; |
2773 | } else { |
2774 | error = nfs_nget1(vp->v_mount, fhp, |
2775 | fhsize, &np, LK_NOWAIT); |
2776 | if (!error) |
2777 | newvp = NFSTOV(np); |
2778 | } |
2779 | if (!error) { |
2780 | nfs_loadattrcache(&newvp, &fattr, 0, 0); |
2781 | if (bigenough) { |
2782 | dp->d_type = |
2783 | IFTODT(VTTOIF(np->n_vattr->va_type)); |
2784 | if (cnp->cn_namelen <= NCHNAMLEN) { |
2785 | ndp->ni_vp = newvp; |
2786 | nfs_cache_enter(ndp->ni_dvp, |
2787 | ndp->ni_vp, cnp); |
2788 | } |
2789 | } |
2790 | } |
2791 | error = 0; |
2792 | } |
2793 | } else { |
2794 | /* Just skip over the file handle */ |
2795 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
2796 | i = fxdr_unsigned(int, *tl); |
2797 | nfsm_adv(nfsm_rndup(i)); |
2798 | } |
2799 | if (newvp != NULLVP) { |
2800 | if (newvp == vp) |
2801 | vrele(newvp); |
2802 | else |
2803 | vput(newvp); |
2804 | newvp = NULLVP; |
2805 | } |
2806 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
2807 | more_dirs = fxdr_unsigned(int, *tl); |
2808 | } |
2809 | /* |
2810 | * If at end of rpc data, get the eof boolean |
2811 | */ |
2812 | if (!more_dirs) { |
2813 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
2814 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
2815 | |
2816 | /* |
2817 | * kludge: see a comment in nfs_readdirrpc. |
2818 | */ |
2819 | |
2820 | if (uiop->uio_resid >= NFS_DIRBLKSIZ) |
2821 | more_dirs = 0; |
2822 | } |
2823 | m_freem(mrep); |
2824 | } |
2825 | /* |
2826 | * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ |
2827 | * by increasing d_reclen for the last record. |
2828 | */ |
2829 | if (blksiz > 0) { |
2830 | left = NFS_DIRFRAGSIZ - blksiz; |
2831 | memset(uiop->uio_iov->iov_base, 0, left); |
2832 | dp->d_reclen += left; |
2833 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
2834 | UIO_ADVANCE(uiop, left); |
2835 | } |
2836 | |
2837 | /* |
2838 | * We are now either at the end of the directory or have filled the |
2839 | * block. |
2840 | */ |
2841 | if (bigenough) { |
2842 | dnp->n_direofoffset = uiop->uio_offset; |
2843 | dnp->n_flag |= NEOFVALID; |
2844 | } |
2845 | nfsmout: |
2846 | if (newvp != NULLVP) { |
2847 | if(newvp == vp) |
2848 | vrele(newvp); |
2849 | else |
2850 | vput(newvp); |
2851 | } |
2852 | return (error); |
2853 | } |
2854 | #endif |
2855 | |
2856 | /* |
2857 | * Silly rename. To make the NFS filesystem that is stateless look a little |
2858 | * more like the "ufs" a remove of an active vnode is translated to a rename |
2859 | * to a funny looking filename that is removed by nfs_inactive on the |
2860 | * nfsnode. There is the potential for another process on a different client |
2861 | * to create the same funny name between the nfs_lookitup() fails and the |
2862 | * nfs_rename() completes, but... |
2863 | */ |
2864 | int |
2865 | nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp, bool dolink) |
2866 | { |
2867 | struct sillyrename *sp; |
2868 | struct nfsnode *np; |
2869 | int error; |
2870 | pid_t pid; |
2871 | |
2872 | cache_purge(dvp); |
2873 | np = VTONFS(vp); |
2874 | #ifndef DIAGNOSTIC |
2875 | if (vp->v_type == VDIR) |
2876 | panic("nfs: sillyrename dir" ); |
2877 | #endif |
2878 | sp = kmem_alloc(sizeof(*sp), KM_SLEEP); |
2879 | sp->s_cred = kauth_cred_dup(cnp->cn_cred); |
2880 | sp->s_dvp = dvp; |
2881 | vref(dvp); |
2882 | |
2883 | /* Fudge together a funny name */ |
2884 | pid = curlwp->l_proc->p_pid; |
2885 | memcpy(sp->s_name, ".nfsAxxxx4.4" , 13); |
2886 | sp->s_namlen = 12; |
2887 | sp->s_name[8] = hexdigits[pid & 0xf]; |
2888 | sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; |
2889 | sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; |
2890 | sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; |
2891 | |
2892 | /* Try lookitups until we get one that isn't there */ |
2893 | while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
2894 | curlwp, (struct nfsnode **)0) == 0) { |
2895 | sp->s_name[4]++; |
2896 | if (sp->s_name[4] > 'z') { |
2897 | error = EINVAL; |
2898 | goto bad; |
2899 | } |
2900 | } |
2901 | if (dolink) { |
2902 | error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, |
2903 | sp->s_cred, curlwp); |
2904 | /* |
2905 | * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. |
2906 | */ |
2907 | if (error == ENOTSUP) { |
2908 | error = nfs_renameit(dvp, cnp, sp); |
2909 | } |
2910 | } else { |
2911 | error = nfs_renameit(dvp, cnp, sp); |
2912 | } |
2913 | if (error) |
2914 | goto bad; |
2915 | error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
2916 | curlwp, &np); |
2917 | np->n_sillyrename = sp; |
2918 | return (0); |
2919 | bad: |
2920 | vrele(sp->s_dvp); |
2921 | kauth_cred_free(sp->s_cred); |
2922 | kmem_free(sp, sizeof(*sp)); |
2923 | return (error); |
2924 | } |
2925 | |
2926 | /* |
2927 | * Look up a file name and optionally either update the file handle or |
2928 | * allocate an nfsnode, depending on the value of npp. |
2929 | * npp == NULL --> just do the lookup |
2930 | * *npp == NULL --> allocate a new nfsnode and make sure attributes are |
2931 | * handled too |
2932 | * *npp != NULL --> update the file handle in the vnode |
2933 | */ |
2934 | int |
2935 | nfs_lookitup(struct vnode *dvp, const char *name, int len, kauth_cred_t cred, struct lwp *l, struct nfsnode **npp) |
2936 | { |
2937 | u_int32_t *tl; |
2938 | char *cp; |
2939 | int32_t t1, t2; |
2940 | struct vnode *newvp = (struct vnode *)0; |
2941 | struct nfsnode *np, *dnp = VTONFS(dvp); |
2942 | char *bpos, *dpos, *cp2; |
2943 | int error = 0, ofhlen, fhlen; |
2944 | #ifndef NFS_V2_ONLY |
2945 | int attrflag; |
2946 | #endif |
2947 | struct mbuf *mreq, *mrep, *md, *mb; |
2948 | nfsfh_t *ofhp, *nfhp; |
2949 | const int v3 = NFS_ISV3(dvp); |
2950 | |
2951 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
2952 | nfsm_reqhead(dnp, NFSPROC_LOOKUP, |
2953 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
2954 | nfsm_fhtom(dnp, v3); |
2955 | nfsm_strtom(name, len, NFS_MAXNAMLEN); |
2956 | nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); |
2957 | if (npp && !error) { |
2958 | nfsm_getfh(nfhp, fhlen, v3); |
2959 | if (*npp) { |
2960 | np = *npp; |
2961 | newvp = NFSTOV(np); |
2962 | ofhlen = np->n_fhsize; |
2963 | ofhp = kmem_alloc(ofhlen, KM_SLEEP); |
2964 | memcpy(ofhp, np->n_fhp, ofhlen); |
2965 | error = vcache_rekey_enter(newvp->v_mount, newvp, |
2966 | ofhp, ofhlen, nfhp, fhlen); |
2967 | if (error) { |
2968 | kmem_free(ofhp, ofhlen); |
2969 | m_freem(mrep); |
2970 | return error; |
2971 | } |
2972 | if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { |
2973 | kmem_free(np->n_fhp, np->n_fhsize); |
2974 | np->n_fhp = &np->n_fh; |
2975 | } |
2976 | #if NFS_SMALLFH < NFSX_V3FHMAX |
2977 | else if (np->n_fhsize <= NFS_SMALLFH && fhlen > NFS_SMALLFH) |
2978 | np->n_fhp = kmem_alloc(fhlen, KM_SLEEP); |
2979 | #endif |
2980 | memcpy(np->n_fhp, nfhp, fhlen); |
2981 | np->n_fhsize = fhlen; |
2982 | vcache_rekey_exit(newvp->v_mount, newvp, |
2983 | ofhp, ofhlen, np->n_fhp, fhlen); |
2984 | kmem_free(ofhp, ofhlen); |
2985 | } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { |
2986 | vref(dvp); |
2987 | newvp = dvp; |
2988 | np = dnp; |
2989 | } else { |
2990 | error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); |
2991 | if (error) { |
2992 | m_freem(mrep); |
2993 | return (error); |
2994 | } |
2995 | newvp = NFSTOV(np); |
2996 | } |
2997 | #ifndef NFS_V2_ONLY |
2998 | if (v3) { |
2999 | nfsm_postop_attr(newvp, attrflag, 0); |
3000 | if (!attrflag && *npp == NULL) { |
3001 | m_freem(mrep); |
3002 | vput(newvp); |
3003 | return (ENOENT); |
3004 | } |
3005 | } else |
3006 | #endif |
3007 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
3008 | } |
3009 | nfsm_reqdone; |
3010 | if (npp && *npp == NULL) { |
3011 | if (error) { |
3012 | if (newvp) |
3013 | vput(newvp); |
3014 | } else |
3015 | *npp = np; |
3016 | } |
3017 | return (error); |
3018 | } |
3019 | |
3020 | #ifndef NFS_V2_ONLY |
3021 | /* |
3022 | * Nfs Version 3 commit rpc |
3023 | */ |
3024 | int |
3025 | nfs_commit(struct vnode *vp, off_t offset, uint32_t cnt, struct lwp *l) |
3026 | { |
3027 | char *cp; |
3028 | u_int32_t *tl; |
3029 | int32_t t1, t2; |
3030 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
3031 | char *bpos, *dpos, *cp2; |
3032 | int error = 0, wccflag = NFSV3_WCCRATTR; |
3033 | struct mbuf *mreq, *mrep, *md, *mb; |
3034 | struct nfsnode *np; |
3035 | |
3036 | KASSERT(NFS_ISV3(vp)); |
3037 | |
3038 | #ifdef NFS_DEBUG_COMMIT |
3039 | printf("commit %lu - %lu\n" , (unsigned long)offset, |
3040 | (unsigned long)(offset + cnt)); |
3041 | #endif |
3042 | |
3043 | mutex_enter(&nmp->nm_lock); |
3044 | if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { |
3045 | mutex_exit(&nmp->nm_lock); |
3046 | return (0); |
3047 | } |
3048 | mutex_exit(&nmp->nm_lock); |
3049 | nfsstats.rpccnt[NFSPROC_COMMIT]++; |
3050 | np = VTONFS(vp); |
3051 | nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); |
3052 | nfsm_fhtom(np, 1); |
3053 | nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
3054 | txdr_hyper(offset, tl); |
3055 | tl += 2; |
3056 | *tl = txdr_unsigned(cnt); |
3057 | nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); |
3058 | nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); |
3059 | if (!error) { |
3060 | nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); |
3061 | mutex_enter(&nmp->nm_lock); |
3062 | if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || |
3063 | memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { |
3064 | memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); |
3065 | error = NFSERR_STALEWRITEVERF; |
3066 | nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; |
3067 | } |
3068 | mutex_exit(&nmp->nm_lock); |
3069 | } |
3070 | nfsm_reqdone; |
3071 | return (error); |
3072 | } |
3073 | #endif |
3074 | |
3075 | /* |
3076 | * Kludge City.. |
3077 | * - make nfs_bmap() essentially a no-op that does no translation |
3078 | * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc |
3079 | * (Maybe I could use the process's page mapping, but I was concerned that |
3080 | * Kernel Write might not be enabled and also figured copyout() would do |
3081 | * a lot more work than memcpy() and also it currently happens in the |
3082 | * context of the swapper process (2). |
3083 | */ |
3084 | int |
3085 | nfs_bmap(void *v) |
3086 | { |
3087 | struct vop_bmap_args /* { |
3088 | struct vnode *a_vp; |
3089 | daddr_t a_bn; |
3090 | struct vnode **a_vpp; |
3091 | daddr_t *a_bnp; |
3092 | int *a_runp; |
3093 | } */ *ap = v; |
3094 | struct vnode *vp = ap->a_vp; |
3095 | int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; |
3096 | |
3097 | if (ap->a_vpp != NULL) |
3098 | *ap->a_vpp = vp; |
3099 | if (ap->a_bnp != NULL) |
3100 | *ap->a_bnp = ap->a_bn << bshift; |
3101 | if (ap->a_runp != NULL) |
3102 | *ap->a_runp = 1024 * 1024; /* XXX */ |
3103 | return (0); |
3104 | } |
3105 | |
3106 | /* |
3107 | * Strategy routine. |
3108 | * For async requests when nfsiod(s) are running, queue the request by |
3109 | * calling nfs_asyncio(), otherwise just all nfs_doio() to do the |
3110 | * request. |
3111 | */ |
3112 | int |
3113 | nfs_strategy(void *v) |
3114 | { |
3115 | struct vop_strategy_args *ap = v; |
3116 | struct buf *bp = ap->a_bp; |
3117 | int error = 0; |
3118 | |
3119 | if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) |
3120 | panic("nfs physio/async" ); |
3121 | |
3122 | /* |
3123 | * If the op is asynchronous and an i/o daemon is waiting |
3124 | * queue the request, wake it up and wait for completion |
3125 | * otherwise just do it ourselves. |
3126 | */ |
3127 | if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) |
3128 | error = nfs_doio(bp); |
3129 | return (error); |
3130 | } |
3131 | |
3132 | /* |
3133 | * fsync vnode op. Just call nfs_flush() with commit == 1. |
3134 | */ |
3135 | /* ARGSUSED */ |
3136 | int |
3137 | nfs_fsync(void *v) |
3138 | { |
3139 | struct vop_fsync_args /* { |
3140 | struct vnodeop_desc *a_desc; |
3141 | struct vnode * a_vp; |
3142 | kauth_cred_t a_cred; |
3143 | int a_flags; |
3144 | off_t offlo; |
3145 | off_t offhi; |
3146 | struct lwp * a_l; |
3147 | } */ *ap = v; |
3148 | |
3149 | struct vnode *vp = ap->a_vp; |
3150 | |
3151 | if (vp->v_type != VREG) |
3152 | return 0; |
3153 | |
3154 | return (nfs_flush(vp, ap->a_cred, |
3155 | (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, curlwp, 1)); |
3156 | } |
3157 | |
3158 | /* |
3159 | * Flush all the data associated with a vnode. |
3160 | */ |
3161 | int |
3162 | nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, |
3163 | int commit) |
3164 | { |
3165 | struct nfsnode *np = VTONFS(vp); |
3166 | int error; |
3167 | int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; |
3168 | UVMHIST_FUNC("nfs_flush" ); UVMHIST_CALLED(ubchist); |
3169 | |
3170 | mutex_enter(vp->v_interlock); |
3171 | error = VOP_PUTPAGES(vp, 0, 0, flushflags); |
3172 | if (np->n_flag & NWRITEERR) { |
3173 | error = np->n_error; |
3174 | np->n_flag &= ~NWRITEERR; |
3175 | } |
3176 | UVMHIST_LOG(ubchist, "returning %d" , error,0,0,0); |
3177 | return (error); |
3178 | } |
3179 | |
3180 | /* |
3181 | * Return POSIX pathconf information applicable to nfs. |
3182 | * |
3183 | * N.B. The NFS V2 protocol doesn't support this RPC. |
3184 | */ |
3185 | /* ARGSUSED */ |
3186 | int |
3187 | nfs_pathconf(void *v) |
3188 | { |
3189 | struct vop_pathconf_args /* { |
3190 | struct vnode *a_vp; |
3191 | int a_name; |
3192 | register_t *a_retval; |
3193 | } */ *ap = v; |
3194 | struct nfsv3_pathconf *pcp; |
3195 | struct vnode *vp = ap->a_vp; |
3196 | struct mbuf *mreq, *mrep, *md, *mb; |
3197 | int32_t t1, t2; |
3198 | u_int32_t *tl; |
3199 | char *bpos, *dpos, *cp, *cp2; |
3200 | int error = 0, attrflag; |
3201 | #ifndef NFS_V2_ONLY |
3202 | struct nfsmount *nmp; |
3203 | unsigned int l; |
3204 | u_int64_t maxsize; |
3205 | #endif |
3206 | const int v3 = NFS_ISV3(vp); |
3207 | struct nfsnode *np = VTONFS(vp); |
3208 | |
3209 | switch (ap->a_name) { |
3210 | /* Names that can be resolved locally. */ |
3211 | case _PC_PIPE_BUF: |
3212 | *ap->a_retval = PIPE_BUF; |
3213 | break; |
3214 | case _PC_SYNC_IO: |
3215 | *ap->a_retval = 1; |
3216 | break; |
3217 | /* Names that cannot be resolved locally; do an RPC, if possible. */ |
3218 | case _PC_LINK_MAX: |
3219 | case _PC_NAME_MAX: |
3220 | case _PC_CHOWN_RESTRICTED: |
3221 | case _PC_NO_TRUNC: |
3222 | if (!v3) { |
3223 | error = EINVAL; |
3224 | break; |
3225 | } |
3226 | nfsstats.rpccnt[NFSPROC_PATHCONF]++; |
3227 | nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); |
3228 | nfsm_fhtom(np, 1); |
3229 | nfsm_request(np, NFSPROC_PATHCONF, |
3230 | curlwp, curlwp->l_cred); /* XXX */ |
3231 | nfsm_postop_attr(vp, attrflag, 0); |
3232 | if (!error) { |
3233 | nfsm_dissect(pcp, struct nfsv3_pathconf *, |
3234 | NFSX_V3PATHCONF); |
3235 | switch (ap->a_name) { |
3236 | case _PC_LINK_MAX: |
3237 | *ap->a_retval = |
3238 | fxdr_unsigned(register_t, pcp->pc_linkmax); |
3239 | break; |
3240 | case _PC_NAME_MAX: |
3241 | *ap->a_retval = |
3242 | fxdr_unsigned(register_t, pcp->pc_namemax); |
3243 | break; |
3244 | case _PC_CHOWN_RESTRICTED: |
3245 | *ap->a_retval = |
3246 | (pcp->pc_chownrestricted == nfs_true); |
3247 | break; |
3248 | case _PC_NO_TRUNC: |
3249 | *ap->a_retval = |
3250 | (pcp->pc_notrunc == nfs_true); |
3251 | break; |
3252 | } |
3253 | } |
3254 | nfsm_reqdone; |
3255 | break; |
3256 | case _PC_FILESIZEBITS: |
3257 | #ifndef NFS_V2_ONLY |
3258 | if (v3) { |
3259 | nmp = VFSTONFS(vp->v_mount); |
3260 | if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) |
3261 | if ((error = nfs_fsinfo(nmp, vp, |
3262 | curlwp->l_cred, curlwp)) != 0) /* XXX */ |
3263 | break; |
3264 | for (l = 0, maxsize = nmp->nm_maxfilesize; |
3265 | (maxsize >> l) > 0; l++) |
3266 | ; |
3267 | *ap->a_retval = l + 1; |
3268 | } else |
3269 | #endif |
3270 | { |
3271 | *ap->a_retval = 32; /* NFS V2 limitation */ |
3272 | } |
3273 | break; |
3274 | default: |
3275 | error = EINVAL; |
3276 | break; |
3277 | } |
3278 | |
3279 | return (error); |
3280 | } |
3281 | |
3282 | /* |
3283 | * NFS advisory byte-level locks. |
3284 | */ |
3285 | int |
3286 | nfs_advlock(void *v) |
3287 | { |
3288 | struct vop_advlock_args /* { |
3289 | struct vnode *a_vp; |
3290 | void *a_id; |
3291 | int a_op; |
3292 | struct flock *a_fl; |
3293 | int a_flags; |
3294 | } */ *ap = v; |
3295 | struct nfsnode *np = VTONFS(ap->a_vp); |
3296 | |
3297 | return lf_advlock(ap, &np->n_lockf, np->n_size); |
3298 | } |
3299 | |
3300 | /* |
3301 | * Print out the contents of an nfsnode. |
3302 | */ |
3303 | int |
3304 | nfs_print(void *v) |
3305 | { |
3306 | struct vop_print_args /* { |
3307 | struct vnode *a_vp; |
3308 | } */ *ap = v; |
3309 | struct vnode *vp = ap->a_vp; |
3310 | struct nfsnode *np = VTONFS(vp); |
3311 | |
3312 | printf("tag VT_NFS, fileid %lld fsid 0x%llx" , |
3313 | (unsigned long long)np->n_vattr->va_fileid, |
3314 | (unsigned long long)np->n_vattr->va_fsid); |
3315 | if (vp->v_type == VFIFO) |
3316 | VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); |
3317 | printf("\n" ); |
3318 | return (0); |
3319 | } |
3320 | |
3321 | /* |
3322 | * nfs unlock wrapper. |
3323 | */ |
3324 | int |
3325 | nfs_unlock(void *v) |
3326 | { |
3327 | struct vop_unlock_args /* { |
3328 | struct vnode *a_vp; |
3329 | int a_flags; |
3330 | } */ *ap = v; |
3331 | struct vnode *vp = ap->a_vp; |
3332 | |
3333 | /* |
3334 | * VOP_UNLOCK can be called by nfs_loadattrcache |
3335 | * with v_data == 0. |
3336 | */ |
3337 | if (VTONFS(vp)) { |
3338 | nfs_delayedtruncate(vp); |
3339 | } |
3340 | |
3341 | return genfs_unlock(v); |
3342 | } |
3343 | |
3344 | /* |
3345 | * nfs special file access vnode op. |
3346 | * Essentially just get vattr and then imitate iaccess() since the device is |
3347 | * local to the client. |
3348 | */ |
3349 | int |
3350 | nfsspec_access(void *v) |
3351 | { |
3352 | struct vop_access_args /* { |
3353 | struct vnode *a_vp; |
3354 | int a_mode; |
3355 | kauth_cred_t a_cred; |
3356 | struct lwp *a_l; |
3357 | } */ *ap = v; |
3358 | struct vattr va; |
3359 | struct vnode *vp = ap->a_vp; |
3360 | int error; |
3361 | |
3362 | error = VOP_GETATTR(vp, &va, ap->a_cred); |
3363 | if (error) |
3364 | return (error); |
3365 | |
3366 | /* |
3367 | * Disallow write attempts on filesystems mounted read-only; |
3368 | * unless the file is a socket, fifo, or a block or character |
3369 | * device resident on the filesystem. |
3370 | */ |
3371 | if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
3372 | switch (vp->v_type) { |
3373 | case VREG: |
3374 | case VDIR: |
3375 | case VLNK: |
3376 | return (EROFS); |
3377 | default: |
3378 | break; |
3379 | } |
3380 | } |
3381 | |
3382 | return kauth_authorize_vnode(ap->a_cred, KAUTH_ACCESS_ACTION(ap->a_mode, |
3383 | va.va_type, va.va_mode), vp, NULL, genfs_can_access(va.va_type, |
3384 | va.va_mode, va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); |
3385 | } |
3386 | |
3387 | /* |
3388 | * Read wrapper for special devices. |
3389 | */ |
3390 | int |
3391 | nfsspec_read(void *v) |
3392 | { |
3393 | struct vop_read_args /* { |
3394 | struct vnode *a_vp; |
3395 | struct uio *a_uio; |
3396 | int a_ioflag; |
3397 | kauth_cred_t a_cred; |
3398 | } */ *ap = v; |
3399 | struct nfsnode *np = VTONFS(ap->a_vp); |
3400 | |
3401 | /* |
3402 | * Set access flag. |
3403 | */ |
3404 | np->n_flag |= NACC; |
3405 | getnanotime(&np->n_atim); |
3406 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); |
3407 | } |
3408 | |
3409 | /* |
3410 | * Write wrapper for special devices. |
3411 | */ |
3412 | int |
3413 | nfsspec_write(void *v) |
3414 | { |
3415 | struct vop_write_args /* { |
3416 | struct vnode *a_vp; |
3417 | struct uio *a_uio; |
3418 | int a_ioflag; |
3419 | kauth_cred_t a_cred; |
3420 | } */ *ap = v; |
3421 | struct nfsnode *np = VTONFS(ap->a_vp); |
3422 | |
3423 | /* |
3424 | * Set update flag. |
3425 | */ |
3426 | np->n_flag |= NUPD; |
3427 | getnanotime(&np->n_mtim); |
3428 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); |
3429 | } |
3430 | |
3431 | /* |
3432 | * Close wrapper for special devices. |
3433 | * |
3434 | * Update the times on the nfsnode then do device close. |
3435 | */ |
3436 | int |
3437 | nfsspec_close(void *v) |
3438 | { |
3439 | struct vop_close_args /* { |
3440 | struct vnode *a_vp; |
3441 | int a_fflag; |
3442 | kauth_cred_t a_cred; |
3443 | struct lwp *a_l; |
3444 | } */ *ap = v; |
3445 | struct vnode *vp = ap->a_vp; |
3446 | struct nfsnode *np = VTONFS(vp); |
3447 | struct vattr vattr; |
3448 | |
3449 | if (np->n_flag & (NACC | NUPD)) { |
3450 | np->n_flag |= NCHG; |
3451 | if (vp->v_usecount == 1 && |
3452 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
3453 | vattr_null(&vattr); |
3454 | if (np->n_flag & NACC) |
3455 | vattr.va_atime = np->n_atim; |
3456 | if (np->n_flag & NUPD) |
3457 | vattr.va_mtime = np->n_mtim; |
3458 | (void)VOP_SETATTR(vp, &vattr, ap->a_cred); |
3459 | } |
3460 | } |
3461 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); |
3462 | } |
3463 | |
3464 | /* |
3465 | * Read wrapper for fifos. |
3466 | */ |
3467 | int |
3468 | nfsfifo_read(void *v) |
3469 | { |
3470 | struct vop_read_args /* { |
3471 | struct vnode *a_vp; |
3472 | struct uio *a_uio; |
3473 | int a_ioflag; |
3474 | kauth_cred_t a_cred; |
3475 | } */ *ap = v; |
3476 | struct nfsnode *np = VTONFS(ap->a_vp); |
3477 | |
3478 | /* |
3479 | * Set access flag. |
3480 | */ |
3481 | np->n_flag |= NACC; |
3482 | getnanotime(&np->n_atim); |
3483 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
3484 | } |
3485 | |
3486 | /* |
3487 | * Write wrapper for fifos. |
3488 | */ |
3489 | int |
3490 | nfsfifo_write(void *v) |
3491 | { |
3492 | struct vop_write_args /* { |
3493 | struct vnode *a_vp; |
3494 | struct uio *a_uio; |
3495 | int a_ioflag; |
3496 | kauth_cred_t a_cred; |
3497 | } */ *ap = v; |
3498 | struct nfsnode *np = VTONFS(ap->a_vp); |
3499 | |
3500 | /* |
3501 | * Set update flag. |
3502 | */ |
3503 | np->n_flag |= NUPD; |
3504 | getnanotime(&np->n_mtim); |
3505 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
3506 | } |
3507 | |
3508 | /* |
3509 | * Close wrapper for fifos. |
3510 | * |
3511 | * Update the times on the nfsnode then do fifo close. |
3512 | */ |
3513 | int |
3514 | nfsfifo_close(void *v) |
3515 | { |
3516 | struct vop_close_args /* { |
3517 | struct vnode *a_vp; |
3518 | int a_fflag; |
3519 | kauth_cred_t a_cred; |
3520 | struct lwp *a_l; |
3521 | } */ *ap = v; |
3522 | struct vnode *vp = ap->a_vp; |
3523 | struct nfsnode *np = VTONFS(vp); |
3524 | struct vattr vattr; |
3525 | |
3526 | if (np->n_flag & (NACC | NUPD)) { |
3527 | struct timespec ts; |
3528 | |
3529 | getnanotime(&ts); |
3530 | if (np->n_flag & NACC) |
3531 | np->n_atim = ts; |
3532 | if (np->n_flag & NUPD) |
3533 | np->n_mtim = ts; |
3534 | np->n_flag |= NCHG; |
3535 | if (vp->v_usecount == 1 && |
3536 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
3537 | vattr_null(&vattr); |
3538 | if (np->n_flag & NACC) |
3539 | vattr.va_atime = np->n_atim; |
3540 | if (np->n_flag & NUPD) |
3541 | vattr.va_mtime = np->n_mtim; |
3542 | (void)VOP_SETATTR(vp, &vattr, ap->a_cred); |
3543 | } |
3544 | } |
3545 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); |
3546 | } |
3547 | |