fdesc_vnops.c revision 1.102 1 1.102 ad /* $NetBSD: fdesc_vnops.c,v 1.102 2008/03/21 21:55:00 ad Exp $ */
2 1.15 cgd
3 1.1 cgd /*
4 1.14 mycroft * Copyright (c) 1992, 1993
5 1.14 mycroft * The Regents of the University of California. All rights reserved.
6 1.1 cgd *
7 1.8 cgd * This code is derived from software donated to Berkeley by
8 1.1 cgd * Jan-Simon Pendry.
9 1.1 cgd *
10 1.2 cgd * Redistribution and use in source and binary forms, with or without
11 1.2 cgd * modification, are permitted provided that the following conditions
12 1.2 cgd * are met:
13 1.2 cgd * 1. Redistributions of source code must retain the above copyright
14 1.2 cgd * notice, this list of conditions and the following disclaimer.
15 1.2 cgd * 2. Redistributions in binary form must reproduce the above copyright
16 1.2 cgd * notice, this list of conditions and the following disclaimer in the
17 1.2 cgd * documentation and/or other materials provided with the distribution.
18 1.78 agc * 3. Neither the name of the University nor the names of its contributors
19 1.2 cgd * may be used to endorse or promote products derived from this software
20 1.2 cgd * without specific prior written permission.
21 1.1 cgd *
22 1.2 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 1.2 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 1.2 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 1.2 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 1.2 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 1.2 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 1.2 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 1.2 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 1.2 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 1.2 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 1.2 cgd * SUCH DAMAGE.
33 1.1 cgd *
34 1.44 fvdl * @(#)fdesc_vnops.c 8.17 (Berkeley) 5/22/95
35 1.22 mycroft *
36 1.22 mycroft * #Id: fdesc_vnops.c,v 1.12 1993/04/06 16:17:17 jsp Exp #
37 1.1 cgd */
38 1.1 cgd
39 1.1 cgd /*
40 1.1 cgd * /dev/fd Filesystem
41 1.1 cgd */
42 1.65 lukem
43 1.65 lukem #include <sys/cdefs.h>
44 1.102 ad __KERNEL_RCSID(0, "$NetBSD: fdesc_vnops.c,v 1.102 2008/03/21 21:55:00 ad Exp $");
45 1.1 cgd
46 1.8 cgd #include <sys/param.h>
47 1.8 cgd #include <sys/systm.h>
48 1.8 cgd #include <sys/time.h>
49 1.8 cgd #include <sys/proc.h>
50 1.8 cgd #include <sys/kernel.h> /* boottime */
51 1.8 cgd #include <sys/resourcevar.h>
52 1.30 christos #include <sys/socketvar.h>
53 1.8 cgd #include <sys/filedesc.h>
54 1.8 cgd #include <sys/vnode.h>
55 1.14 mycroft #include <sys/malloc.h>
56 1.32 mrg #include <sys/conf.h>
57 1.8 cgd #include <sys/file.h>
58 1.8 cgd #include <sys/stat.h>
59 1.8 cgd #include <sys/mount.h>
60 1.8 cgd #include <sys/namei.h>
61 1.8 cgd #include <sys/buf.h>
62 1.14 mycroft #include <sys/dirent.h>
63 1.30 christos #include <sys/tty.h>
64 1.92 elad #include <sys/kauth.h>
65 1.102 ad #include <sys/atomic.h>
66 1.34 mycroft
67 1.8 cgd #include <miscfs/fdesc/fdesc.h>
68 1.34 mycroft #include <miscfs/genfs/genfs.h>
69 1.8 cgd
70 1.96 ad #define cttyvp(p) ((p)->p_lflag & PL_CONTROLT ? (p)->p_session->s_ttyvp : NULL)
71 1.8 cgd
72 1.8 cgd #define FDL_WANT 0x01
73 1.8 cgd #define FDL_LOCKED 0x02
74 1.14 mycroft static int fdcache_lock;
75 1.14 mycroft
76 1.14 mycroft dev_t devctty;
77 1.8 cgd
78 1.8 cgd #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
79 1.8 cgd FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
80 1.8 cgd #endif
81 1.8 cgd
82 1.16 mycroft #define NFDCACHE 4
83 1.14 mycroft
84 1.17 mycroft #define FD_NHASH(ix) \
85 1.17 mycroft (&fdhashtbl[(ix) & fdhash])
86 1.17 mycroft LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
87 1.17 mycroft u_long fdhash;
88 1.14 mycroft
89 1.86 xtraeme int fdesc_lookup(void *);
90 1.74 jdolecek #define fdesc_create genfs_eopnotsupp
91 1.74 jdolecek #define fdesc_mknod genfs_eopnotsupp
92 1.86 xtraeme int fdesc_open(void *);
93 1.34 mycroft #define fdesc_close genfs_nullop
94 1.34 mycroft #define fdesc_access genfs_nullop
95 1.86 xtraeme int fdesc_getattr(void *);
96 1.86 xtraeme int fdesc_setattr(void *);
97 1.86 xtraeme int fdesc_read(void *);
98 1.86 xtraeme int fdesc_write(void *);
99 1.86 xtraeme int fdesc_ioctl(void *);
100 1.86 xtraeme int fdesc_poll(void *);
101 1.86 xtraeme int fdesc_kqfilter(void *);
102 1.34 mycroft #define fdesc_mmap genfs_eopnotsupp
103 1.50 wrstuden #define fdesc_fcntl genfs_fcntl
104 1.34 mycroft #define fdesc_fsync genfs_nullop
105 1.40 fvdl #define fdesc_seek genfs_seek
106 1.74 jdolecek #define fdesc_remove genfs_eopnotsupp
107 1.86 xtraeme int fdesc_link(void *);
108 1.74 jdolecek #define fdesc_rename genfs_eopnotsupp
109 1.74 jdolecek #define fdesc_mkdir genfs_eopnotsupp
110 1.74 jdolecek #define fdesc_rmdir genfs_eopnotsupp
111 1.86 xtraeme int fdesc_symlink(void *);
112 1.86 xtraeme int fdesc_readdir(void *);
113 1.86 xtraeme int fdesc_readlink(void *);
114 1.34 mycroft #define fdesc_abortop genfs_abortop
115 1.86 xtraeme int fdesc_inactive(void *);
116 1.86 xtraeme int fdesc_reclaim(void *);
117 1.48 wrstuden #define fdesc_lock genfs_lock
118 1.48 wrstuden #define fdesc_unlock genfs_unlock
119 1.34 mycroft #define fdesc_bmap genfs_badop
120 1.34 mycroft #define fdesc_strategy genfs_badop
121 1.86 xtraeme int fdesc_print(void *);
122 1.86 xtraeme int fdesc_pathconf(void *);
123 1.48 wrstuden #define fdesc_islocked genfs_islocked
124 1.47 kleink #define fdesc_advlock genfs_einval
125 1.34 mycroft #define fdesc_bwrite genfs_eopnotsupp
126 1.44 fvdl #define fdesc_revoke genfs_revoke
127 1.67 chs #define fdesc_putpages genfs_null_putpages
128 1.30 christos
129 1.102 ad static int fdesc_attr(int, struct vattr *, kauth_cred_t);
130 1.30 christos
131 1.86 xtraeme int (**fdesc_vnodeop_p)(void *);
132 1.58 jdolecek const struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
133 1.30 christos { &vop_default_desc, vn_default_error },
134 1.34 mycroft { &vop_lookup_desc, fdesc_lookup }, /* lookup */
135 1.34 mycroft { &vop_create_desc, fdesc_create }, /* create */
136 1.34 mycroft { &vop_mknod_desc, fdesc_mknod }, /* mknod */
137 1.34 mycroft { &vop_open_desc, fdesc_open }, /* open */
138 1.34 mycroft { &vop_close_desc, fdesc_close }, /* close */
139 1.34 mycroft { &vop_access_desc, fdesc_access }, /* access */
140 1.34 mycroft { &vop_getattr_desc, fdesc_getattr }, /* getattr */
141 1.34 mycroft { &vop_setattr_desc, fdesc_setattr }, /* setattr */
142 1.34 mycroft { &vop_read_desc, fdesc_read }, /* read */
143 1.34 mycroft { &vop_write_desc, fdesc_write }, /* write */
144 1.34 mycroft { &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */
145 1.50 wrstuden { &vop_fcntl_desc, fdesc_fcntl }, /* fcntl */
146 1.35 mycroft { &vop_poll_desc, fdesc_poll }, /* poll */
147 1.71 jdolecek { &vop_kqfilter_desc, fdesc_kqfilter }, /* kqfilter */
148 1.44 fvdl { &vop_revoke_desc, fdesc_revoke }, /* revoke */
149 1.34 mycroft { &vop_mmap_desc, fdesc_mmap }, /* mmap */
150 1.34 mycroft { &vop_fsync_desc, fdesc_fsync }, /* fsync */
151 1.34 mycroft { &vop_seek_desc, fdesc_seek }, /* seek */
152 1.34 mycroft { &vop_remove_desc, fdesc_remove }, /* remove */
153 1.34 mycroft { &vop_link_desc, fdesc_link }, /* link */
154 1.34 mycroft { &vop_rename_desc, fdesc_rename }, /* rename */
155 1.34 mycroft { &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */
156 1.34 mycroft { &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */
157 1.34 mycroft { &vop_symlink_desc, fdesc_symlink }, /* symlink */
158 1.34 mycroft { &vop_readdir_desc, fdesc_readdir }, /* readdir */
159 1.34 mycroft { &vop_readlink_desc, fdesc_readlink }, /* readlink */
160 1.34 mycroft { &vop_abortop_desc, fdesc_abortop }, /* abortop */
161 1.34 mycroft { &vop_inactive_desc, fdesc_inactive }, /* inactive */
162 1.34 mycroft { &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */
163 1.34 mycroft { &vop_lock_desc, fdesc_lock }, /* lock */
164 1.34 mycroft { &vop_unlock_desc, fdesc_unlock }, /* unlock */
165 1.34 mycroft { &vop_bmap_desc, fdesc_bmap }, /* bmap */
166 1.34 mycroft { &vop_strategy_desc, fdesc_strategy }, /* strategy */
167 1.34 mycroft { &vop_print_desc, fdesc_print }, /* print */
168 1.34 mycroft { &vop_islocked_desc, fdesc_islocked }, /* islocked */
169 1.34 mycroft { &vop_pathconf_desc, fdesc_pathconf }, /* pathconf */
170 1.34 mycroft { &vop_advlock_desc, fdesc_advlock }, /* advlock */
171 1.34 mycroft { &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */
172 1.67 chs { &vop_putpages_desc, fdesc_putpages }, /* putpages */
173 1.67 chs { NULL, NULL }
174 1.30 christos };
175 1.30 christos
176 1.58 jdolecek const struct vnodeopv_desc fdesc_vnodeop_opv_desc =
177 1.30 christos { &fdesc_vnodeop_p, fdesc_vnodeop_entries };
178 1.30 christos
179 1.70 gehenna extern const struct cdevsw ctty_cdevsw;
180 1.70 gehenna
181 1.14 mycroft /*
182 1.14 mycroft * Initialise cache headers
183 1.14 mycroft */
184 1.30 christos void
185 1.14 mycroft fdesc_init()
186 1.14 mycroft {
187 1.32 mrg int cttymajor;
188 1.14 mycroft
189 1.32 mrg /* locate the major number */
190 1.70 gehenna cttymajor = cdevsw_lookup_major(&ctty_cdevsw);
191 1.32 mrg devctty = makedev(cttymajor, 0);
192 1.57 ad fdhashtbl = hashinit(NFDCACHE, HASH_LIST, M_CACHE, M_NOWAIT, &fdhash);
193 1.54 jdolecek }
194 1.54 jdolecek
195 1.54 jdolecek /*
196 1.54 jdolecek * Free hash table.
197 1.54 jdolecek */
198 1.54 jdolecek void
199 1.54 jdolecek fdesc_done()
200 1.54 jdolecek {
201 1.54 jdolecek hashdone(fdhashtbl, M_CACHE);
202 1.14 mycroft }
203 1.14 mycroft
204 1.48 wrstuden /*
205 1.48 wrstuden * Return a locked vnode of the correct type.
206 1.48 wrstuden */
207 1.14 mycroft int
208 1.8 cgd fdesc_allocvp(ftype, ix, mp, vpp)
209 1.8 cgd fdntype ftype;
210 1.8 cgd int ix;
211 1.8 cgd struct mount *mp;
212 1.8 cgd struct vnode **vpp;
213 1.8 cgd {
214 1.17 mycroft struct fdhashhead *fc;
215 1.14 mycroft struct fdescnode *fd;
216 1.8 cgd int error = 0;
217 1.8 cgd
218 1.17 mycroft fc = FD_NHASH(ix);
219 1.8 cgd loop:
220 1.17 mycroft for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
221 1.14 mycroft if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
222 1.76 thorpej if (vget(fd->fd_vnode, LK_EXCLUSIVE))
223 1.8 cgd goto loop;
224 1.14 mycroft *vpp = fd->fd_vnode;
225 1.8 cgd return (error);
226 1.8 cgd }
227 1.8 cgd }
228 1.8 cgd
229 1.8 cgd /*
230 1.8 cgd * otherwise lock the array while we call getnewvnode
231 1.8 cgd * since that can block.
232 1.83 perry */
233 1.14 mycroft if (fdcache_lock & FDL_LOCKED) {
234 1.14 mycroft fdcache_lock |= FDL_WANT;
235 1.55 thorpej (void) tsleep(&fdcache_lock, PINOD, "fdcache", 0);
236 1.8 cgd goto loop;
237 1.8 cgd }
238 1.14 mycroft fdcache_lock |= FDL_LOCKED;
239 1.1 cgd
240 1.14 mycroft error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, vpp);
241 1.8 cgd if (error)
242 1.8 cgd goto out;
243 1.14 mycroft MALLOC(fd, void *, sizeof(struct fdescnode), M_TEMP, M_WAITOK);
244 1.14 mycroft (*vpp)->v_data = fd;
245 1.14 mycroft fd->fd_vnode = *vpp;
246 1.14 mycroft fd->fd_type = ftype;
247 1.14 mycroft fd->fd_fd = -1;
248 1.14 mycroft fd->fd_link = 0;
249 1.14 mycroft fd->fd_ix = ix;
250 1.98 pooka uvm_vnp_setsize(*vpp, 0);
251 1.48 wrstuden VOP_LOCK(*vpp, LK_EXCLUSIVE);
252 1.17 mycroft LIST_INSERT_HEAD(fc, fd, fd_hash);
253 1.8 cgd
254 1.8 cgd out:;
255 1.14 mycroft fdcache_lock &= ~FDL_LOCKED;
256 1.8 cgd
257 1.14 mycroft if (fdcache_lock & FDL_WANT) {
258 1.14 mycroft fdcache_lock &= ~FDL_WANT;
259 1.81 jrf wakeup(&fdcache_lock);
260 1.8 cgd }
261 1.8 cgd
262 1.8 cgd return (error);
263 1.8 cgd }
264 1.1 cgd
265 1.1 cgd /*
266 1.1 cgd * vp is the current namei directory
267 1.1 cgd * ndp is the name to locate in that directory...
268 1.1 cgd */
269 1.14 mycroft int
270 1.30 christos fdesc_lookup(v)
271 1.30 christos void *v;
272 1.30 christos {
273 1.14 mycroft struct vop_lookup_args /* {
274 1.14 mycroft struct vnode * a_dvp;
275 1.14 mycroft struct vnode ** a_vpp;
276 1.14 mycroft struct componentname * a_cnp;
277 1.30 christos } */ *ap = v;
278 1.14 mycroft struct vnode **vpp = ap->a_vpp;
279 1.14 mycroft struct vnode *dvp = ap->a_dvp;
280 1.44 fvdl struct componentname *cnp = ap->a_cnp;
281 1.101 pooka struct lwp *l = curlwp;
282 1.44 fvdl const char *pname = cnp->cn_nameptr;
283 1.89 christos struct proc *p = l->l_proc;
284 1.102 ad filedesc_t *fdp = p->p_fd;
285 1.102 ad int numfiles = fdp->fd_nfiles;
286 1.30 christos unsigned fd = 0;
287 1.1 cgd int error;
288 1.1 cgd struct vnode *fvp;
289 1.84 christos const char *ln;
290 1.1 cgd
291 1.44 fvdl if (cnp->cn_namelen == 1 && *pname == '.') {
292 1.14 mycroft *vpp = dvp;
293 1.44 fvdl VREF(dvp);
294 1.1 cgd return (0);
295 1.1 cgd }
296 1.1 cgd
297 1.8 cgd switch (VTOFDESC(dvp)->fd_type) {
298 1.8 cgd default:
299 1.8 cgd case Flink:
300 1.8 cgd case Fdesc:
301 1.8 cgd case Fctty:
302 1.8 cgd error = ENOTDIR;
303 1.8 cgd goto bad;
304 1.8 cgd
305 1.8 cgd case Froot:
306 1.46 perry if (cnp->cn_namelen == 2 && memcmp(pname, "fd", 2) == 0) {
307 1.8 cgd error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp);
308 1.8 cgd if (error)
309 1.8 cgd goto bad;
310 1.14 mycroft *vpp = fvp;
311 1.8 cgd fvp->v_type = VDIR;
312 1.48 wrstuden goto good;
313 1.8 cgd }
314 1.8 cgd
315 1.46 perry if (cnp->cn_namelen == 3 && memcmp(pname, "tty", 3) == 0) {
316 1.8 cgd struct vnode *ttyvp = cttyvp(p);
317 1.8 cgd if (ttyvp == NULL) {
318 1.8 cgd error = ENXIO;
319 1.8 cgd goto bad;
320 1.8 cgd }
321 1.8 cgd error = fdesc_allocvp(Fctty, FD_CTTY, dvp->v_mount, &fvp);
322 1.8 cgd if (error)
323 1.8 cgd goto bad;
324 1.14 mycroft *vpp = fvp;
325 1.32 mrg fvp->v_type = VCHR;
326 1.48 wrstuden goto good;
327 1.8 cgd }
328 1.8 cgd
329 1.8 cgd ln = 0;
330 1.44 fvdl switch (cnp->cn_namelen) {
331 1.8 cgd case 5:
332 1.46 perry if (memcmp(pname, "stdin", 5) == 0) {
333 1.8 cgd ln = "fd/0";
334 1.8 cgd fd = FD_STDIN;
335 1.8 cgd }
336 1.1 cgd break;
337 1.8 cgd case 6:
338 1.46 perry if (memcmp(pname, "stdout", 6) == 0) {
339 1.8 cgd ln = "fd/1";
340 1.8 cgd fd = FD_STDOUT;
341 1.8 cgd } else
342 1.46 perry if (memcmp(pname, "stderr", 6) == 0) {
343 1.8 cgd ln = "fd/2";
344 1.8 cgd fd = FD_STDERR;
345 1.8 cgd }
346 1.8 cgd break;
347 1.8 cgd }
348 1.8 cgd
349 1.8 cgd if (ln) {
350 1.8 cgd error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp);
351 1.8 cgd if (error)
352 1.8 cgd goto bad;
353 1.84 christos /* XXXUNCONST */
354 1.84 christos VTOFDESC(fvp)->fd_link = __UNCONST(ln);
355 1.14 mycroft *vpp = fvp;
356 1.8 cgd fvp->v_type = VLNK;
357 1.48 wrstuden goto good;
358 1.8 cgd } else {
359 1.8 cgd error = ENOENT;
360 1.8 cgd goto bad;
361 1.8 cgd }
362 1.8 cgd
363 1.14 mycroft /* FALL THROUGH */
364 1.8 cgd
365 1.8 cgd case Fdevfd:
366 1.46 perry if (cnp->cn_namelen == 2 && memcmp(pname, "..", 2) == 0) {
367 1.48 wrstuden VOP_UNLOCK(dvp, 0);
368 1.76 thorpej error = fdesc_root(dvp->v_mount, vpp);
369 1.95 chs vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
370 1.44 fvdl if (error)
371 1.44 fvdl goto bad;
372 1.48 wrstuden return (error);
373 1.8 cgd }
374 1.8 cgd
375 1.8 cgd fd = 0;
376 1.8 cgd while (*pname >= '0' && *pname <= '9') {
377 1.8 cgd fd = 10 * fd + *pname++ - '0';
378 1.84 christos if (fd >= numfiles)
379 1.8 cgd break;
380 1.8 cgd }
381 1.1 cgd
382 1.8 cgd if (*pname != '\0') {
383 1.8 cgd error = ENOENT;
384 1.8 cgd goto bad;
385 1.8 cgd }
386 1.1 cgd
387 1.102 ad mutex_enter(&fdp->fd_lock);
388 1.102 ad if (fd >= numfiles ||fdp->fd_ofiles[fd] == NULL ||
389 1.102 ad fdp->fd_ofiles[fd]->ff_file == NULL) {
390 1.102 ad mutex_exit(&fdp->fd_lock);
391 1.8 cgd error = EBADF;
392 1.8 cgd goto bad;
393 1.8 cgd }
394 1.102 ad mutex_exit(&fdp->fd_lock);
395 1.1 cgd
396 1.8 cgd error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
397 1.8 cgd if (error)
398 1.8 cgd goto bad;
399 1.8 cgd VTOFDESC(fvp)->fd_fd = fd;
400 1.14 mycroft *vpp = fvp;
401 1.48 wrstuden goto good;
402 1.8 cgd }
403 1.1 cgd
404 1.95 chs bad:
405 1.14 mycroft *vpp = NULL;
406 1.1 cgd return (error);
407 1.48 wrstuden
408 1.95 chs good:
409 1.48 wrstuden return (0);
410 1.1 cgd }
411 1.1 cgd
412 1.14 mycroft int
413 1.30 christos fdesc_open(v)
414 1.30 christos void *v;
415 1.30 christos {
416 1.14 mycroft struct vop_open_args /* {
417 1.14 mycroft struct vnode *a_vp;
418 1.14 mycroft int a_mode;
419 1.92 elad kauth_cred_t a_cred;
420 1.30 christos } */ *ap = v;
421 1.14 mycroft struct vnode *vp = ap->a_vp;
422 1.8 cgd
423 1.8 cgd switch (VTOFDESC(vp)->fd_type) {
424 1.8 cgd case Fdesc:
425 1.23 mycroft /*
426 1.79 jdolecek * XXX Kludge: set dupfd to contain the value of the
427 1.83 perry * the file descriptor being sought for duplication. The error
428 1.23 mycroft * return ensures that the vnode for this device will be
429 1.23 mycroft * released by vn_open. Open will detect this special error and
430 1.23 mycroft * take the actions in dupfdopen. Other callers of vn_open or
431 1.23 mycroft * VOP_OPEN will simply report the error.
432 1.23 mycroft */
433 1.79 jdolecek curlwp->l_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
434 1.82 christos return EDUPFD;
435 1.1 cgd
436 1.8 cgd case Fctty:
437 1.100 pooka return cdev_open(devctty, ap->a_mode, 0, curlwp);
438 1.30 christos case Froot:
439 1.30 christos case Fdevfd:
440 1.30 christos case Flink:
441 1.30 christos break;
442 1.8 cgd }
443 1.1 cgd
444 1.21 mycroft return (0);
445 1.1 cgd }
446 1.1 cgd
447 1.1 cgd static int
448 1.102 ad fdesc_attr(fd, vap, cred)
449 1.1 cgd int fd;
450 1.1 cgd struct vattr *vap;
451 1.92 elad kauth_cred_t cred;
452 1.1 cgd {
453 1.102 ad file_t *fp;
454 1.8 cgd struct stat stb;
455 1.1 cgd int error;
456 1.1 cgd
457 1.102 ad if ((fp = fd_getfile(fd)) == NULL)
458 1.1 cgd return (EBADF);
459 1.1 cgd
460 1.1 cgd switch (fp->f_type) {
461 1.1 cgd case DTYPE_VNODE:
462 1.100 pooka error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred);
463 1.8 cgd if (error == 0 && vap->va_type == VDIR) {
464 1.8 cgd /*
465 1.22 mycroft * directories can cause loops in the namespace,
466 1.22 mycroft * so turn off the 'x' bits to avoid trouble.
467 1.8 cgd */
468 1.41 mycroft vap->va_mode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
469 1.8 cgd }
470 1.1 cgd break;
471 1.1 cgd
472 1.69 jdolecek default:
473 1.69 jdolecek memset(&stb, 0, sizeof(stb));
474 1.102 ad error = (*fp->f_ops->fo_stat)(fp, &stb);
475 1.69 jdolecek if (error)
476 1.69 jdolecek break;
477 1.69 jdolecek
478 1.69 jdolecek vattr_null(vap);
479 1.69 jdolecek switch(fp->f_type) {
480 1.69 jdolecek case DTYPE_SOCKET:
481 1.69 jdolecek vap->va_type = VSOCK;
482 1.69 jdolecek break;
483 1.69 jdolecek case DTYPE_PIPE:
484 1.69 jdolecek vap->va_type = VFIFO;
485 1.69 jdolecek break;
486 1.69 jdolecek default:
487 1.69 jdolecek /* use VNON perhaps? */
488 1.69 jdolecek vap->va_type = VBAD;
489 1.69 jdolecek break;
490 1.8 cgd }
491 1.69 jdolecek vap->va_mode = stb.st_mode;
492 1.69 jdolecek vap->va_nlink = stb.st_nlink;
493 1.69 jdolecek vap->va_uid = stb.st_uid;
494 1.69 jdolecek vap->va_gid = stb.st_gid;
495 1.69 jdolecek vap->va_fsid = stb.st_dev;
496 1.69 jdolecek vap->va_fileid = stb.st_ino;
497 1.69 jdolecek vap->va_size = stb.st_size;
498 1.69 jdolecek vap->va_blocksize = stb.st_blksize;
499 1.69 jdolecek vap->va_atime = stb.st_atimespec;
500 1.69 jdolecek vap->va_mtime = stb.st_mtimespec;
501 1.69 jdolecek vap->va_ctime = stb.st_ctimespec;
502 1.69 jdolecek vap->va_gen = stb.st_gen;
503 1.69 jdolecek vap->va_flags = stb.st_flags;
504 1.69 jdolecek vap->va_rdev = stb.st_rdev;
505 1.69 jdolecek vap->va_bytes = stb.st_blocks * stb.st_blksize;
506 1.1 cgd break;
507 1.1 cgd }
508 1.1 cgd
509 1.102 ad fd_putfile(fd);
510 1.1 cgd return (error);
511 1.1 cgd }
512 1.1 cgd
513 1.14 mycroft int
514 1.30 christos fdesc_getattr(v)
515 1.30 christos void *v;
516 1.30 christos {
517 1.14 mycroft struct vop_getattr_args /* {
518 1.14 mycroft struct vnode *a_vp;
519 1.14 mycroft struct vattr *a_vap;
520 1.92 elad kauth_cred_t a_cred;
521 1.89 christos struct lwp *a_l;
522 1.30 christos } */ *ap = v;
523 1.14 mycroft struct vnode *vp = ap->a_vp;
524 1.14 mycroft struct vattr *vap = ap->a_vap;
525 1.1 cgd unsigned fd;
526 1.8 cgd int error = 0;
527 1.1 cgd
528 1.8 cgd switch (VTOFDESC(vp)->fd_type) {
529 1.8 cgd case Froot:
530 1.8 cgd case Fdevfd:
531 1.8 cgd case Flink:
532 1.8 cgd case Fctty:
533 1.33 mrg VATTR_NULL(vap);
534 1.8 cgd vap->va_fileid = VTOFDESC(vp)->fd_ix;
535 1.8 cgd
536 1.30 christos #define R_ALL (S_IRUSR|S_IRGRP|S_IROTH)
537 1.30 christos #define W_ALL (S_IWUSR|S_IWGRP|S_IWOTH)
538 1.30 christos #define X_ALL (S_IXUSR|S_IXGRP|S_IXOTH)
539 1.30 christos
540 1.8 cgd switch (VTOFDESC(vp)->fd_type) {
541 1.8 cgd case Flink:
542 1.30 christos vap->va_mode = R_ALL|X_ALL;
543 1.8 cgd vap->va_type = VLNK;
544 1.32 mrg vap->va_rdev = 0;
545 1.8 cgd vap->va_nlink = 1;
546 1.8 cgd vap->va_size = strlen(VTOFDESC(vp)->fd_link);
547 1.8 cgd break;
548 1.8 cgd
549 1.8 cgd case Fctty:
550 1.30 christos vap->va_mode = R_ALL|W_ALL;
551 1.32 mrg vap->va_type = VCHR;
552 1.32 mrg vap->va_rdev = devctty;
553 1.8 cgd vap->va_nlink = 1;
554 1.8 cgd vap->va_size = 0;
555 1.8 cgd break;
556 1.8 cgd
557 1.8 cgd default:
558 1.30 christos vap->va_mode = R_ALL|X_ALL;
559 1.8 cgd vap->va_type = VDIR;
560 1.32 mrg vap->va_rdev = 0;
561 1.8 cgd vap->va_nlink = 2;
562 1.8 cgd vap->va_size = DEV_BSIZE;
563 1.8 cgd break;
564 1.8 cgd }
565 1.1 cgd vap->va_uid = 0;
566 1.1 cgd vap->va_gid = 0;
567 1.80 christos vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0];
568 1.1 cgd vap->va_blocksize = DEV_BSIZE;
569 1.28 jtc vap->va_atime.tv_sec = boottime.tv_sec;
570 1.28 jtc vap->va_atime.tv_nsec = 0;
571 1.1 cgd vap->va_mtime = vap->va_atime;
572 1.14 mycroft vap->va_ctime = vap->va_mtime;
573 1.1 cgd vap->va_gen = 0;
574 1.1 cgd vap->va_flags = 0;
575 1.1 cgd vap->va_bytes = 0;
576 1.8 cgd break;
577 1.8 cgd
578 1.8 cgd case Fdesc:
579 1.8 cgd fd = VTOFDESC(vp)->fd_fd;
580 1.102 ad error = fdesc_attr(fd, vap, ap->a_cred);
581 1.8 cgd break;
582 1.8 cgd
583 1.8 cgd default:
584 1.8 cgd panic("fdesc_getattr");
585 1.83 perry break;
586 1.1 cgd }
587 1.1 cgd
588 1.1 cgd if (error == 0)
589 1.1 cgd vp->v_type = vap->va_type;
590 1.8 cgd
591 1.1 cgd return (error);
592 1.1 cgd }
593 1.1 cgd
594 1.14 mycroft int
595 1.30 christos fdesc_setattr(v)
596 1.30 christos void *v;
597 1.30 christos {
598 1.14 mycroft struct vop_setattr_args /* {
599 1.14 mycroft struct vnode *a_vp;
600 1.14 mycroft struct vattr *a_vap;
601 1.92 elad kauth_cred_t a_cred;
602 1.30 christos } */ *ap = v;
603 1.102 ad file_t *fp;
604 1.1 cgd unsigned fd;
605 1.1 cgd
606 1.1 cgd /*
607 1.1 cgd * Can't mess with the root vnode
608 1.1 cgd */
609 1.14 mycroft switch (VTOFDESC(ap->a_vp)->fd_type) {
610 1.8 cgd case Fdesc:
611 1.8 cgd break;
612 1.8 cgd
613 1.8 cgd case Fctty:
614 1.8 cgd return (0);
615 1.8 cgd
616 1.8 cgd default:
617 1.1 cgd return (EACCES);
618 1.8 cgd }
619 1.1 cgd
620 1.14 mycroft fd = VTOFDESC(ap->a_vp)->fd_fd;
621 1.102 ad if ((fp = fd_getfile(fd)) == NULL)
622 1.1 cgd return (EBADF);
623 1.1 cgd
624 1.1 cgd /*
625 1.68 jmc * XXX: Can't reasonably set the attr's on any types currently.
626 1.68 jmc * On vnode's this will cause truncation and socket/pipes make
627 1.68 jmc * no sense.
628 1.1 cgd */
629 1.102 ad fd_putfile(fd);
630 1.69 jdolecek return (0);
631 1.1 cgd }
632 1.1 cgd
633 1.8 cgd
634 1.25 mycroft struct fdesc_target {
635 1.25 mycroft ino_t ft_fileno;
636 1.25 mycroft u_char ft_type;
637 1.25 mycroft u_char ft_namlen;
638 1.84 christos const char *ft_name;
639 1.25 mycroft } fdesc_targets[] = {
640 1.25 mycroft #define N(s) sizeof(s)-1, s
641 1.25 mycroft { FD_DEVFD, DT_DIR, N("fd") },
642 1.27 mycroft { FD_STDIN, DT_LNK, N("stdin") },
643 1.27 mycroft { FD_STDOUT, DT_LNK, N("stdout") },
644 1.27 mycroft { FD_STDERR, DT_LNK, N("stderr") },
645 1.25 mycroft { FD_CTTY, DT_UNKNOWN, N("tty") },
646 1.25 mycroft #undef N
647 1.85 christos #define UIO_MX _DIRENT_RECLEN((struct dirent *)NULL, sizeof("stderr") - 1)
648 1.8 cgd };
649 1.25 mycroft static int nfdesc_targets = sizeof(fdesc_targets) / sizeof(fdesc_targets[0]);
650 1.8 cgd
651 1.14 mycroft int
652 1.30 christos fdesc_readdir(v)
653 1.30 christos void *v;
654 1.30 christos {
655 1.14 mycroft struct vop_readdir_args /* {
656 1.14 mycroft struct vnode *a_vp;
657 1.14 mycroft struct uio *a_uio;
658 1.92 elad kauth_cred_t a_cred;
659 1.22 mycroft int *a_eofflag;
660 1.44 fvdl off_t **a_cookies;
661 1.44 fvdl int *a_ncookies;
662 1.30 christos } */ *ap = v;
663 1.14 mycroft struct uio *uio = ap->a_uio;
664 1.25 mycroft struct dirent d;
665 1.102 ad filedesc_t *fdp;
666 1.53 sommerfe off_t i;
667 1.87 christos int j;
668 1.1 cgd int error;
669 1.44 fvdl off_t *cookies = NULL;
670 1.87 christos int ncookies;
671 1.11 ws
672 1.14 mycroft switch (VTOFDESC(ap->a_vp)->fd_type) {
673 1.8 cgd case Fctty:
674 1.87 christos return 0;
675 1.8 cgd
676 1.8 cgd case Fdesc:
677 1.87 christos return ENOTDIR;
678 1.30 christos
679 1.30 christos default:
680 1.30 christos break;
681 1.8 cgd }
682 1.1 cgd
683 1.90 yamt fdp = curproc->p_fd;
684 1.8 cgd
685 1.25 mycroft if (uio->uio_resid < UIO_MX)
686 1.87 christos return EINVAL;
687 1.26 mycroft if (uio->uio_offset < 0)
688 1.87 christos return EINVAL;
689 1.25 mycroft
690 1.25 mycroft error = 0;
691 1.26 mycroft i = uio->uio_offset;
692 1.87 christos (void)memset(&d, 0, UIO_MX);
693 1.25 mycroft d.d_reclen = UIO_MX;
694 1.44 fvdl if (ap->a_ncookies)
695 1.87 christos ncookies = uio->uio_resid / UIO_MX;
696 1.87 christos else
697 1.87 christos ncookies = 0;
698 1.25 mycroft
699 1.14 mycroft if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
700 1.25 mycroft struct fdesc_target *ft;
701 1.51 christos
702 1.51 christos if (i >= nfdesc_targets)
703 1.52 sommerfe return 0;
704 1.3 cgd
705 1.44 fvdl if (ap->a_ncookies) {
706 1.44 fvdl ncookies = min(ncookies, (nfdesc_targets - i));
707 1.56 thorpej cookies = malloc(ncookies * sizeof(off_t),
708 1.44 fvdl M_TEMP, M_WAITOK);
709 1.44 fvdl *ap->a_cookies = cookies;
710 1.44 fvdl *ap->a_ncookies = ncookies;
711 1.44 fvdl }
712 1.44 fvdl
713 1.87 christos for (ft = &fdesc_targets[i]; uio->uio_resid >= UIO_MX &&
714 1.87 christos i < nfdesc_targets; ft++, i++) {
715 1.25 mycroft switch (ft->ft_fileno) {
716 1.8 cgd case FD_CTTY:
717 1.90 yamt if (cttyvp(curproc) == NULL)
718 1.8 cgd continue;
719 1.8 cgd break;
720 1.8 cgd
721 1.8 cgd case FD_STDIN:
722 1.8 cgd case FD_STDOUT:
723 1.8 cgd case FD_STDERR:
724 1.87 christos if (fdp == NULL)
725 1.8 cgd continue;
726 1.87 christos if ((ft->ft_fileno - FD_STDIN) >=
727 1.87 christos fdp->fd_nfiles)
728 1.87 christos continue;
729 1.102 ad membar_consumer();
730 1.87 christos if (fdp->fd_ofiles[ft->ft_fileno - FD_STDIN]
731 1.102 ad == NULL || fdp->fd_ofiles[ft->ft_fileno -
732 1.102 ad FD_STDIN]->ff_file == NULL)
733 1.8 cgd continue;
734 1.8 cgd break;
735 1.8 cgd }
736 1.25 mycroft
737 1.25 mycroft d.d_fileno = ft->ft_fileno;
738 1.25 mycroft d.d_namlen = ft->ft_namlen;
739 1.87 christos (void)memcpy(d.d_name, ft->ft_name, ft->ft_namlen + 1);
740 1.25 mycroft d.d_type = ft->ft_type;
741 1.25 mycroft
742 1.81 jrf if ((error = uiomove(&d, UIO_MX, uio)) != 0)
743 1.8 cgd break;
744 1.44 fvdl if (cookies)
745 1.26 mycroft *cookies++ = i + 1;
746 1.3 cgd }
747 1.25 mycroft } else {
748 1.87 christos int nfdp = fdp ? fdp->fd_nfiles : 0;
749 1.102 ad membar_consumer();
750 1.44 fvdl if (ap->a_ncookies) {
751 1.87 christos ncookies = min(ncookies, nfdp + 2);
752 1.56 thorpej cookies = malloc(ncookies * sizeof(off_t),
753 1.56 thorpej M_TEMP, M_WAITOK);
754 1.44 fvdl *ap->a_cookies = cookies;
755 1.44 fvdl *ap->a_ncookies = ncookies;
756 1.44 fvdl }
757 1.87 christos for (; i - 2 < nfdp && uio->uio_resid >= UIO_MX; i++) {
758 1.25 mycroft switch (i) {
759 1.25 mycroft case 0:
760 1.25 mycroft case 1:
761 1.25 mycroft d.d_fileno = FD_ROOT; /* XXX */
762 1.25 mycroft d.d_namlen = i + 1;
763 1.87 christos (void)memcpy(d.d_name, "..", d.d_namlen);
764 1.25 mycroft d.d_name[i + 1] = '\0';
765 1.25 mycroft d.d_type = DT_DIR;
766 1.25 mycroft break;
767 1.83 perry
768 1.25 mycroft default:
769 1.87 christos KASSERT(fdp != NULL);
770 1.87 christos j = (int)i - 2;
771 1.91 christos if (fdp == NULL || fdp->fd_ofiles[j] == NULL ||
772 1.102 ad fdp->fd_ofiles[j]->ff_file == NULL)
773 1.25 mycroft continue;
774 1.87 christos d.d_fileno = j + FD_STDIN;
775 1.87 christos d.d_namlen = sprintf(d.d_name, "%d", j);
776 1.25 mycroft d.d_type = DT_UNKNOWN;
777 1.25 mycroft break;
778 1.25 mycroft }
779 1.8 cgd
780 1.81 jrf if ((error = uiomove(&d, UIO_MX, uio)) != 0)
781 1.1 cgd break;
782 1.44 fvdl if (cookies)
783 1.26 mycroft *cookies++ = i + 1;
784 1.1 cgd }
785 1.8 cgd }
786 1.8 cgd
787 1.44 fvdl if (ap->a_ncookies && error) {
788 1.56 thorpej free(*ap->a_cookies, M_TEMP);
789 1.44 fvdl *ap->a_ncookies = 0;
790 1.44 fvdl *ap->a_cookies = NULL;
791 1.44 fvdl }
792 1.44 fvdl
793 1.26 mycroft uio->uio_offset = i;
794 1.87 christos return error;
795 1.8 cgd }
796 1.8 cgd
797 1.14 mycroft int
798 1.30 christos fdesc_readlink(v)
799 1.30 christos void *v;
800 1.30 christos {
801 1.14 mycroft struct vop_readlink_args /* {
802 1.14 mycroft struct vnode *a_vp;
803 1.14 mycroft struct uio *a_uio;
804 1.92 elad kauth_cred_t a_cred;
805 1.30 christos } */ *ap = v;
806 1.14 mycroft struct vnode *vp = ap->a_vp;
807 1.8 cgd int error;
808 1.8 cgd
809 1.14 mycroft if (vp->v_type != VLNK)
810 1.14 mycroft return (EPERM);
811 1.14 mycroft
812 1.8 cgd if (VTOFDESC(vp)->fd_type == Flink) {
813 1.8 cgd char *ln = VTOFDESC(vp)->fd_link;
814 1.14 mycroft error = uiomove(ln, strlen(ln), ap->a_uio);
815 1.8 cgd } else {
816 1.8 cgd error = EOPNOTSUPP;
817 1.8 cgd }
818 1.8 cgd
819 1.8 cgd return (error);
820 1.8 cgd }
821 1.8 cgd
822 1.14 mycroft int
823 1.30 christos fdesc_read(v)
824 1.30 christos void *v;
825 1.30 christos {
826 1.14 mycroft struct vop_read_args /* {
827 1.14 mycroft struct vnode *a_vp;
828 1.14 mycroft struct uio *a_uio;
829 1.14 mycroft int a_ioflag;
830 1.92 elad kauth_cred_t a_cred;
831 1.30 christos } */ *ap = v;
832 1.8 cgd int error = EOPNOTSUPP;
833 1.49 thorpej struct vnode *vp = ap->a_vp;
834 1.8 cgd
835 1.49 thorpej switch (VTOFDESC(vp)->fd_type) {
836 1.8 cgd case Fctty:
837 1.49 thorpej VOP_UNLOCK(vp, 0);
838 1.97 ad error = cdev_read(devctty, ap->a_uio, ap->a_ioflag);
839 1.49 thorpej vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
840 1.8 cgd break;
841 1.8 cgd
842 1.8 cgd default:
843 1.8 cgd error = EOPNOTSUPP;
844 1.8 cgd break;
845 1.8 cgd }
846 1.83 perry
847 1.8 cgd return (error);
848 1.8 cgd }
849 1.8 cgd
850 1.14 mycroft int
851 1.30 christos fdesc_write(v)
852 1.30 christos void *v;
853 1.30 christos {
854 1.14 mycroft struct vop_write_args /* {
855 1.14 mycroft struct vnode *a_vp;
856 1.14 mycroft struct uio *a_uio;
857 1.14 mycroft int a_ioflag;
858 1.92 elad kauth_cred_t a_cred;
859 1.30 christos } */ *ap = v;
860 1.8 cgd int error = EOPNOTSUPP;
861 1.49 thorpej struct vnode *vp = ap->a_vp;
862 1.8 cgd
863 1.49 thorpej switch (VTOFDESC(vp)->fd_type) {
864 1.8 cgd case Fctty:
865 1.49 thorpej VOP_UNLOCK(vp, 0);
866 1.97 ad error = cdev_write(devctty, ap->a_uio, ap->a_ioflag);
867 1.49 thorpej vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
868 1.8 cgd break;
869 1.8 cgd
870 1.8 cgd default:
871 1.8 cgd error = EOPNOTSUPP;
872 1.8 cgd break;
873 1.8 cgd }
874 1.83 perry
875 1.8 cgd return (error);
876 1.8 cgd }
877 1.8 cgd
878 1.14 mycroft int
879 1.30 christos fdesc_ioctl(v)
880 1.30 christos void *v;
881 1.30 christos {
882 1.14 mycroft struct vop_ioctl_args /* {
883 1.14 mycroft struct vnode *a_vp;
884 1.19 cgd u_long a_command;
885 1.81 jrf void *a_data;
886 1.14 mycroft int a_fflag;
887 1.92 elad kauth_cred_t a_cred;
888 1.30 christos } */ *ap = v;
889 1.8 cgd int error = EOPNOTSUPP;
890 1.8 cgd
891 1.14 mycroft switch (VTOFDESC(ap->a_vp)->fd_type) {
892 1.8 cgd case Fctty:
893 1.97 ad error = cdev_ioctl(devctty, ap->a_command, ap->a_data,
894 1.100 pooka ap->a_fflag, curlwp);
895 1.8 cgd break;
896 1.8 cgd
897 1.8 cgd default:
898 1.8 cgd error = EOPNOTSUPP;
899 1.8 cgd break;
900 1.1 cgd }
901 1.83 perry
902 1.8 cgd return (error);
903 1.8 cgd }
904 1.8 cgd
905 1.14 mycroft int
906 1.35 mycroft fdesc_poll(v)
907 1.30 christos void *v;
908 1.30 christos {
909 1.35 mycroft struct vop_poll_args /* {
910 1.14 mycroft struct vnode *a_vp;
911 1.35 mycroft int a_events;
912 1.30 christos } */ *ap = v;
913 1.35 mycroft int revents;
914 1.8 cgd
915 1.14 mycroft switch (VTOFDESC(ap->a_vp)->fd_type) {
916 1.8 cgd case Fctty:
917 1.100 pooka revents = cdev_poll(devctty, ap->a_events, curlwp);
918 1.8 cgd break;
919 1.1 cgd
920 1.8 cgd default:
921 1.35 mycroft revents = genfs_poll(v);
922 1.8 cgd break;
923 1.8 cgd }
924 1.34 mycroft
925 1.35 mycroft return (revents);
926 1.71 jdolecek }
927 1.71 jdolecek
928 1.71 jdolecek int
929 1.71 jdolecek fdesc_kqfilter(v)
930 1.71 jdolecek void *v;
931 1.71 jdolecek {
932 1.71 jdolecek struct vop_kqfilter_args /* {
933 1.71 jdolecek struct vnode *a_vp;
934 1.71 jdolecek struct knote *a_kn;
935 1.71 jdolecek } */ *ap = v;
936 1.102 ad int error, fd;
937 1.102 ad file_t *fp;
938 1.71 jdolecek
939 1.71 jdolecek switch (VTOFDESC(ap->a_vp)->fd_type) {
940 1.71 jdolecek case Fctty:
941 1.97 ad error = cdev_kqfilter(devctty, ap->a_kn);
942 1.71 jdolecek break;
943 1.71 jdolecek
944 1.71 jdolecek case Fdesc:
945 1.71 jdolecek /* just invoke kqfilter for the underlying descriptor */
946 1.102 ad fd = VTOFDESC(ap->a_vp)->fd_fd;
947 1.102 ad if ((fp = fd_getfile(fd)) == NULL)
948 1.71 jdolecek return (1);
949 1.71 jdolecek error = (*fp->f_ops->fo_kqfilter)(fp, ap->a_kn);
950 1.102 ad fd_putfile(fd);
951 1.71 jdolecek break;
952 1.71 jdolecek
953 1.71 jdolecek default:
954 1.71 jdolecek return (genfs_kqfilter(v));
955 1.71 jdolecek }
956 1.71 jdolecek
957 1.71 jdolecek return (error);
958 1.1 cgd }
959 1.1 cgd
960 1.14 mycroft int
961 1.30 christos fdesc_inactive(v)
962 1.30 christos void *v;
963 1.30 christos {
964 1.14 mycroft struct vop_inactive_args /* {
965 1.14 mycroft struct vnode *a_vp;
966 1.30 christos } */ *ap = v;
967 1.14 mycroft struct vnode *vp = ap->a_vp;
968 1.14 mycroft
969 1.1 cgd /*
970 1.1 cgd * Clear out the v_type field to avoid
971 1.1 cgd * nasty things happening in vgone().
972 1.1 cgd */
973 1.44 fvdl VOP_UNLOCK(vp, 0);
974 1.1 cgd vp->v_type = VNON;
975 1.1 cgd return (0);
976 1.1 cgd }
977 1.1 cgd
978 1.14 mycroft int
979 1.30 christos fdesc_reclaim(v)
980 1.30 christos void *v;
981 1.30 christos {
982 1.14 mycroft struct vop_reclaim_args /* {
983 1.14 mycroft struct vnode *a_vp;
984 1.30 christos } */ *ap = v;
985 1.14 mycroft struct vnode *vp = ap->a_vp;
986 1.17 mycroft struct fdescnode *fd = VTOFDESC(vp);
987 1.14 mycroft
988 1.17 mycroft LIST_REMOVE(fd, fd_hash);
989 1.14 mycroft FREE(vp->v_data, M_TEMP);
990 1.14 mycroft vp->v_data = 0;
991 1.14 mycroft
992 1.14 mycroft return (0);
993 1.14 mycroft }
994 1.14 mycroft
995 1.14 mycroft /*
996 1.14 mycroft * Return POSIX pathconf information applicable to special devices.
997 1.14 mycroft */
998 1.30 christos int
999 1.30 christos fdesc_pathconf(v)
1000 1.30 christos void *v;
1001 1.30 christos {
1002 1.14 mycroft struct vop_pathconf_args /* {
1003 1.14 mycroft struct vnode *a_vp;
1004 1.14 mycroft int a_name;
1005 1.18 cgd register_t *a_retval;
1006 1.30 christos } */ *ap = v;
1007 1.8 cgd
1008 1.14 mycroft switch (ap->a_name) {
1009 1.14 mycroft case _PC_LINK_MAX:
1010 1.14 mycroft *ap->a_retval = LINK_MAX;
1011 1.14 mycroft return (0);
1012 1.14 mycroft case _PC_MAX_CANON:
1013 1.14 mycroft *ap->a_retval = MAX_CANON;
1014 1.14 mycroft return (0);
1015 1.14 mycroft case _PC_MAX_INPUT:
1016 1.14 mycroft *ap->a_retval = MAX_INPUT;
1017 1.14 mycroft return (0);
1018 1.14 mycroft case _PC_PIPE_BUF:
1019 1.14 mycroft *ap->a_retval = PIPE_BUF;
1020 1.14 mycroft return (0);
1021 1.14 mycroft case _PC_CHOWN_RESTRICTED:
1022 1.14 mycroft *ap->a_retval = 1;
1023 1.14 mycroft return (0);
1024 1.14 mycroft case _PC_VDISABLE:
1025 1.14 mycroft *ap->a_retval = _POSIX_VDISABLE;
1026 1.45 kleink return (0);
1027 1.45 kleink case _PC_SYNC_IO:
1028 1.45 kleink *ap->a_retval = 1;
1029 1.14 mycroft return (0);
1030 1.14 mycroft default:
1031 1.14 mycroft return (EINVAL);
1032 1.8 cgd }
1033 1.14 mycroft /* NOTREACHED */
1034 1.8 cgd }
1035 1.8 cgd
1036 1.1 cgd /*
1037 1.1 cgd * Print out the contents of a /dev/fd vnode.
1038 1.1 cgd */
1039 1.1 cgd /* ARGSUSED */
1040 1.14 mycroft int
1041 1.94 christos fdesc_print(void *v)
1042 1.1 cgd {
1043 1.37 christos printf("tag VT_NON, fdesc vnode\n");
1044 1.14 mycroft return (0);
1045 1.14 mycroft }
1046 1.14 mycroft
1047 1.14 mycroft int
1048 1.83 perry fdesc_link(v)
1049 1.30 christos void *v;
1050 1.30 christos {
1051 1.29 mycroft struct vop_link_args /* {
1052 1.29 mycroft struct vnode *a_dvp;
1053 1.83 perry struct vnode *a_vp;
1054 1.29 mycroft struct componentname *a_cnp;
1055 1.30 christos } */ *ap = v;
1056 1.83 perry
1057 1.29 mycroft VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1058 1.29 mycroft vput(ap->a_dvp);
1059 1.29 mycroft return (EROFS);
1060 1.29 mycroft }
1061 1.29 mycroft
1062 1.29 mycroft int
1063 1.30 christos fdesc_symlink(v)
1064 1.30 christos void *v;
1065 1.30 christos {
1066 1.29 mycroft struct vop_symlink_args /* {
1067 1.29 mycroft struct vnode *a_dvp;
1068 1.29 mycroft struct vnode **a_vpp;
1069 1.29 mycroft struct componentname *a_cnp;
1070 1.29 mycroft struct vattr *a_vap;
1071 1.29 mycroft char *a_target;
1072 1.30 christos } */ *ap = v;
1073 1.83 perry
1074 1.29 mycroft VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1075 1.29 mycroft vput(ap->a_dvp);
1076 1.29 mycroft return (EROFS);
1077 1.1 cgd }
1078