Annotation of src/sys/miscfs/fdesc/fdesc_vnops.c, Revision 1.126
1.126 ! riastrad 1: /* $NetBSD: fdesc_vnops.c,v 1.125 2014/09/05 10:43:26 christos Exp $ */
1.15 cgd 2:
1.1 cgd 3: /*
1.14 mycroft 4: * Copyright (c) 1992, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
1.8 cgd 7: * This code is derived from software donated to Berkeley by
1.1 cgd 8: * Jan-Simon Pendry.
9: *
1.2 cgd 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.
1.78 agc 18: * 3. Neither the name of the University nor the names of its contributors
1.2 cgd 19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
1.1 cgd 21: *
1.2 cgd 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.
1.1 cgd 33: *
1.44 fvdl 34: * @(#)fdesc_vnops.c 8.17 (Berkeley) 5/22/95
1.22 mycroft 35: *
36: * #Id: fdesc_vnops.c,v 1.12 1993/04/06 16:17:17 jsp Exp #
1.1 cgd 37: */
38:
39: /*
40: * /dev/fd Filesystem
41: */
1.65 lukem 42:
43: #include <sys/cdefs.h>
1.126 ! riastrad 44: __KERNEL_RCSID(0, "$NetBSD: fdesc_vnops.c,v 1.125 2014/09/05 10:43:26 christos Exp $");
1.1 cgd 45:
1.8 cgd 46: #include <sys/param.h>
47: #include <sys/systm.h>
48: #include <sys/time.h>
49: #include <sys/proc.h>
50: #include <sys/kernel.h> /* boottime */
51: #include <sys/resourcevar.h>
1.30 christos 52: #include <sys/socketvar.h>
1.8 cgd 53: #include <sys/filedesc.h>
54: #include <sys/vnode.h>
1.14 mycroft 55: #include <sys/malloc.h>
1.32 mrg 56: #include <sys/conf.h>
1.8 cgd 57: #include <sys/file.h>
58: #include <sys/stat.h>
59: #include <sys/mount.h>
60: #include <sys/namei.h>
61: #include <sys/buf.h>
1.14 mycroft 62: #include <sys/dirent.h>
1.30 christos 63: #include <sys/tty.h>
1.92 elad 64: #include <sys/kauth.h>
1.102 ad 65: #include <sys/atomic.h>
1.34 mycroft 66:
1.8 cgd 67: #include <miscfs/fdesc/fdesc.h>
1.34 mycroft 68: #include <miscfs/genfs/genfs.h>
1.8 cgd 69:
1.96 ad 70: #define cttyvp(p) ((p)->p_lflag & PL_CONTROLT ? (p)->p_session->s_ttyvp : NULL)
1.8 cgd 71:
1.14 mycroft 72: dev_t devctty;
1.8 cgd 73:
74: #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
75: FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
76: #endif
77:
1.86 xtraeme 78: int fdesc_lookup(void *);
1.74 jdolecek 79: #define fdesc_create genfs_eopnotsupp
80: #define fdesc_mknod genfs_eopnotsupp
1.86 xtraeme 81: int fdesc_open(void *);
1.34 mycroft 82: #define fdesc_close genfs_nullop
83: #define fdesc_access genfs_nullop
1.86 xtraeme 84: int fdesc_getattr(void *);
85: int fdesc_setattr(void *);
86: int fdesc_read(void *);
87: int fdesc_write(void *);
88: int fdesc_ioctl(void *);
89: int fdesc_poll(void *);
90: int fdesc_kqfilter(void *);
1.34 mycroft 91: #define fdesc_mmap genfs_eopnotsupp
1.50 wrstuden 92: #define fdesc_fcntl genfs_fcntl
1.34 mycroft 93: #define fdesc_fsync genfs_nullop
1.40 fvdl 94: #define fdesc_seek genfs_seek
1.74 jdolecek 95: #define fdesc_remove genfs_eopnotsupp
1.86 xtraeme 96: int fdesc_link(void *);
1.74 jdolecek 97: #define fdesc_rename genfs_eopnotsupp
98: #define fdesc_mkdir genfs_eopnotsupp
99: #define fdesc_rmdir genfs_eopnotsupp
1.86 xtraeme 100: int fdesc_symlink(void *);
101: int fdesc_readdir(void *);
102: int fdesc_readlink(void *);
1.34 mycroft 103: #define fdesc_abortop genfs_abortop
1.86 xtraeme 104: int fdesc_inactive(void *);
105: int fdesc_reclaim(void *);
1.48 wrstuden 106: #define fdesc_lock genfs_lock
107: #define fdesc_unlock genfs_unlock
1.34 mycroft 108: #define fdesc_bmap genfs_badop
109: #define fdesc_strategy genfs_badop
1.86 xtraeme 110: int fdesc_print(void *);
111: int fdesc_pathconf(void *);
1.48 wrstuden 112: #define fdesc_islocked genfs_islocked
1.47 kleink 113: #define fdesc_advlock genfs_einval
1.34 mycroft 114: #define fdesc_bwrite genfs_eopnotsupp
1.44 fvdl 115: #define fdesc_revoke genfs_revoke
1.67 chs 116: #define fdesc_putpages genfs_null_putpages
1.30 christos 117:
1.102 ad 118: static int fdesc_attr(int, struct vattr *, kauth_cred_t);
1.30 christos 119:
1.86 xtraeme 120: int (**fdesc_vnodeop_p)(void *);
1.58 jdolecek 121: const struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
1.30 christos 122: { &vop_default_desc, vn_default_error },
1.34 mycroft 123: { &vop_lookup_desc, fdesc_lookup }, /* lookup */
124: { &vop_create_desc, fdesc_create }, /* create */
125: { &vop_mknod_desc, fdesc_mknod }, /* mknod */
126: { &vop_open_desc, fdesc_open }, /* open */
127: { &vop_close_desc, fdesc_close }, /* close */
128: { &vop_access_desc, fdesc_access }, /* access */
129: { &vop_getattr_desc, fdesc_getattr }, /* getattr */
130: { &vop_setattr_desc, fdesc_setattr }, /* setattr */
131: { &vop_read_desc, fdesc_read }, /* read */
132: { &vop_write_desc, fdesc_write }, /* write */
1.121 dholland 133: { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */
134: { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */
1.34 mycroft 135: { &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */
1.50 wrstuden 136: { &vop_fcntl_desc, fdesc_fcntl }, /* fcntl */
1.35 mycroft 137: { &vop_poll_desc, fdesc_poll }, /* poll */
1.71 jdolecek 138: { &vop_kqfilter_desc, fdesc_kqfilter }, /* kqfilter */
1.44 fvdl 139: { &vop_revoke_desc, fdesc_revoke }, /* revoke */
1.34 mycroft 140: { &vop_mmap_desc, fdesc_mmap }, /* mmap */
141: { &vop_fsync_desc, fdesc_fsync }, /* fsync */
142: { &vop_seek_desc, fdesc_seek }, /* seek */
143: { &vop_remove_desc, fdesc_remove }, /* remove */
144: { &vop_link_desc, fdesc_link }, /* link */
145: { &vop_rename_desc, fdesc_rename }, /* rename */
146: { &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */
147: { &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */
148: { &vop_symlink_desc, fdesc_symlink }, /* symlink */
149: { &vop_readdir_desc, fdesc_readdir }, /* readdir */
150: { &vop_readlink_desc, fdesc_readlink }, /* readlink */
151: { &vop_abortop_desc, fdesc_abortop }, /* abortop */
152: { &vop_inactive_desc, fdesc_inactive }, /* inactive */
153: { &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */
154: { &vop_lock_desc, fdesc_lock }, /* lock */
155: { &vop_unlock_desc, fdesc_unlock }, /* unlock */
156: { &vop_bmap_desc, fdesc_bmap }, /* bmap */
157: { &vop_strategy_desc, fdesc_strategy }, /* strategy */
158: { &vop_print_desc, fdesc_print }, /* print */
159: { &vop_islocked_desc, fdesc_islocked }, /* islocked */
160: { &vop_pathconf_desc, fdesc_pathconf }, /* pathconf */
161: { &vop_advlock_desc, fdesc_advlock }, /* advlock */
162: { &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */
1.67 chs 163: { &vop_putpages_desc, fdesc_putpages }, /* putpages */
164: { NULL, NULL }
1.30 christos 165: };
166:
1.58 jdolecek 167: const struct vnodeopv_desc fdesc_vnodeop_opv_desc =
1.30 christos 168: { &fdesc_vnodeop_p, fdesc_vnodeop_entries };
169:
1.14 mycroft 170: /*
171: * Initialise cache headers
172: */
1.30 christos 173: void
1.106 cegger 174: fdesc_init(void)
1.14 mycroft 175: {
1.32 mrg 176: int cttymajor;
1.14 mycroft 177:
1.32 mrg 178: /* locate the major number */
1.108 pooka 179: cttymajor = devsw_name2chr("ctty", NULL, 0);
1.32 mrg 180: devctty = makedev(cttymajor, 0);
1.54 jdolecek 181: }
182:
183: void
1.106 cegger 184: fdesc_done(void)
1.54 jdolecek 185: {
1.8 cgd 186: }
1.1 cgd 187:
188: /*
189: * vp is the current namei directory
190: * ndp is the name to locate in that directory...
191: */
1.14 mycroft 192: int
1.105 dsl 193: fdesc_lookup(void *v)
1.30 christos 194: {
1.117 hannken 195: struct vop_lookup_v2_args /* {
1.14 mycroft 196: struct vnode * a_dvp;
197: struct vnode ** a_vpp;
198: struct componentname * a_cnp;
1.30 christos 199: } */ *ap = v;
1.14 mycroft 200: struct vnode **vpp = ap->a_vpp;
201: struct vnode *dvp = ap->a_dvp;
1.44 fvdl 202: struct componentname *cnp = ap->a_cnp;
1.101 pooka 203: struct lwp *l = curlwp;
1.44 fvdl 204: const char *pname = cnp->cn_nameptr;
1.89 christos 205: struct proc *p = l->l_proc;
1.30 christos 206: unsigned fd = 0;
1.120 hannken 207: int error, ix = -1;
1.107 ad 208: fdtab_t *dt;
209:
210: dt = curlwp->l_fd->fd_dt;
1.1 cgd 211:
1.44 fvdl 212: if (cnp->cn_namelen == 1 && *pname == '.') {
1.14 mycroft 213: *vpp = dvp;
1.109 pooka 214: vref(dvp);
1.1 cgd 215: return (0);
216: }
217:
1.8 cgd 218: switch (VTOFDESC(dvp)->fd_type) {
219: default:
220: case Flink:
221: case Fdesc:
222: case Fctty:
223: error = ENOTDIR;
224: goto bad;
225:
226: case Froot:
1.46 perry 227: if (cnp->cn_namelen == 2 && memcmp(pname, "fd", 2) == 0) {
1.120 hannken 228: ix = FD_DEVFD;
1.48 wrstuden 229: goto good;
1.8 cgd 230: }
231:
1.46 perry 232: if (cnp->cn_namelen == 3 && memcmp(pname, "tty", 3) == 0) {
1.8 cgd 233: struct vnode *ttyvp = cttyvp(p);
234: if (ttyvp == NULL) {
235: error = ENXIO;
236: goto bad;
237: }
1.120 hannken 238: ix = FD_CTTY;
1.48 wrstuden 239: goto good;
1.8 cgd 240: }
241:
1.44 fvdl 242: switch (cnp->cn_namelen) {
1.8 cgd 243: case 5:
1.46 perry 244: if (memcmp(pname, "stdin", 5) == 0) {
1.120 hannken 245: ix = FD_STDIN;
246: goto good;
1.8 cgd 247: }
1.1 cgd 248: break;
1.8 cgd 249: case 6:
1.46 perry 250: if (memcmp(pname, "stdout", 6) == 0) {
1.120 hannken 251: ix = FD_STDOUT;
252: goto good;
253: } else if (memcmp(pname, "stderr", 6) == 0) {
254: ix = FD_STDERR;
255: goto good;
1.8 cgd 256: }
257: break;
258: }
259:
1.120 hannken 260: error = ENOENT;
261: goto bad;
1.8 cgd 262:
263: case Fdevfd:
1.46 perry 264: if (cnp->cn_namelen == 2 && memcmp(pname, "..", 2) == 0) {
1.120 hannken 265: ix = FD_ROOT;
266: goto good;
1.8 cgd 267: }
268:
269: fd = 0;
270: while (*pname >= '0' && *pname <= '9') {
271: fd = 10 * fd + *pname++ - '0';
1.107 ad 272: if (fd >= dt->dt_nfiles)
1.8 cgd 273: break;
274: }
1.1 cgd 275:
1.8 cgd 276: if (*pname != '\0') {
277: error = ENOENT;
278: goto bad;
279: }
1.1 cgd 280:
1.107 ad 281: if (fd >= dt->dt_nfiles || dt->dt_ff[fd] == NULL ||
282: dt->dt_ff[fd]->ff_file == NULL) {
1.8 cgd 283: error = EBADF;
284: goto bad;
285: }
1.1 cgd 286:
1.120 hannken 287: ix = FD_DESC + fd;
1.48 wrstuden 288: goto good;
1.8 cgd 289: }
1.1 cgd 290:
1.95 chs 291: bad:
1.14 mycroft 292: *vpp = NULL;
1.120 hannken 293: return error;
1.48 wrstuden 294:
1.95 chs 295: good:
1.120 hannken 296: KASSERT(ix != -1);
297: error = vcache_get(dvp->v_mount, &ix, sizeof(ix), vpp);
1.125 christos 298: if (error == 0 && ix == FD_CTTY)
299: (*vpp)->v_type = VCHR;
1.120 hannken 300: return error;
1.1 cgd 301: }
302:
1.14 mycroft 303: int
1.105 dsl 304: fdesc_open(void *v)
1.30 christos 305: {
1.14 mycroft 306: struct vop_open_args /* {
307: struct vnode *a_vp;
308: int a_mode;
1.92 elad 309: kauth_cred_t a_cred;
1.30 christos 310: } */ *ap = v;
1.14 mycroft 311: struct vnode *vp = ap->a_vp;
1.8 cgd 312:
313: switch (VTOFDESC(vp)->fd_type) {
314: case Fdesc:
1.23 mycroft 315: /*
1.79 jdolecek 316: * XXX Kludge: set dupfd to contain the value of the
1.83 perry 317: * the file descriptor being sought for duplication. The error
1.23 mycroft 318: * return ensures that the vnode for this device will be
319: * released by vn_open. Open will detect this special error and
320: * take the actions in dupfdopen. Other callers of vn_open or
321: * VOP_OPEN will simply report the error.
322: */
1.79 jdolecek 323: curlwp->l_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
1.82 christos 324: return EDUPFD;
1.1 cgd 325:
1.8 cgd 326: case Fctty:
1.100 pooka 327: return cdev_open(devctty, ap->a_mode, 0, curlwp);
1.30 christos 328: case Froot:
329: case Fdevfd:
330: case Flink:
331: break;
1.8 cgd 332: }
1.1 cgd 333:
1.21 mycroft 334: return (0);
1.1 cgd 335: }
336:
337: static int
1.105 dsl 338: fdesc_attr(int fd, struct vattr *vap, kauth_cred_t cred)
1.1 cgd 339: {
1.102 ad 340: file_t *fp;
1.8 cgd 341: struct stat stb;
1.1 cgd 342: int error;
343:
1.102 ad 344: if ((fp = fd_getfile(fd)) == NULL)
1.1 cgd 345: return (EBADF);
346:
347: switch (fp->f_type) {
348: case DTYPE_VNODE:
1.124 matt 349: vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
350: error = VOP_GETATTR(fp->f_vnode, vap, cred);
351: VOP_UNLOCK(fp->f_vnode);
1.8 cgd 352: if (error == 0 && vap->va_type == VDIR) {
353: /*
1.22 mycroft 354: * directories can cause loops in the namespace,
355: * so turn off the 'x' bits to avoid trouble.
1.8 cgd 356: */
1.41 mycroft 357: vap->va_mode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
1.8 cgd 358: }
1.1 cgd 359: break;
360:
1.69 jdolecek 361: default:
362: memset(&stb, 0, sizeof(stb));
1.102 ad 363: error = (*fp->f_ops->fo_stat)(fp, &stb);
1.69 jdolecek 364: if (error)
365: break;
366:
367: vattr_null(vap);
368: switch(fp->f_type) {
369: case DTYPE_SOCKET:
370: vap->va_type = VSOCK;
371: break;
372: case DTYPE_PIPE:
373: vap->va_type = VFIFO;
374: break;
375: default:
376: /* use VNON perhaps? */
377: vap->va_type = VBAD;
378: break;
1.8 cgd 379: }
1.69 jdolecek 380: vap->va_mode = stb.st_mode;
381: vap->va_nlink = stb.st_nlink;
382: vap->va_uid = stb.st_uid;
383: vap->va_gid = stb.st_gid;
384: vap->va_fsid = stb.st_dev;
385: vap->va_fileid = stb.st_ino;
386: vap->va_size = stb.st_size;
387: vap->va_blocksize = stb.st_blksize;
388: vap->va_atime = stb.st_atimespec;
389: vap->va_mtime = stb.st_mtimespec;
390: vap->va_ctime = stb.st_ctimespec;
391: vap->va_gen = stb.st_gen;
392: vap->va_flags = stb.st_flags;
393: vap->va_rdev = stb.st_rdev;
394: vap->va_bytes = stb.st_blocks * stb.st_blksize;
1.1 cgd 395: break;
396: }
397:
1.102 ad 398: fd_putfile(fd);
1.1 cgd 399: return (error);
400: }
401:
1.14 mycroft 402: int
1.105 dsl 403: fdesc_getattr(void *v)
1.30 christos 404: {
1.14 mycroft 405: struct vop_getattr_args /* {
406: struct vnode *a_vp;
407: struct vattr *a_vap;
1.92 elad 408: kauth_cred_t a_cred;
1.89 christos 409: struct lwp *a_l;
1.30 christos 410: } */ *ap = v;
1.14 mycroft 411: struct vnode *vp = ap->a_vp;
412: struct vattr *vap = ap->a_vap;
1.1 cgd 413: unsigned fd;
1.8 cgd 414: int error = 0;
1.1 cgd 415:
1.8 cgd 416: switch (VTOFDESC(vp)->fd_type) {
417: case Froot:
418: case Fdevfd:
419: case Flink:
420: case Fctty:
1.109 pooka 421: vattr_null(vap);
1.8 cgd 422: vap->va_fileid = VTOFDESC(vp)->fd_ix;
423:
1.30 christos 424: #define R_ALL (S_IRUSR|S_IRGRP|S_IROTH)
425: #define W_ALL (S_IWUSR|S_IWGRP|S_IWOTH)
426: #define X_ALL (S_IXUSR|S_IXGRP|S_IXOTH)
427:
1.8 cgd 428: switch (VTOFDESC(vp)->fd_type) {
429: case Flink:
1.30 christos 430: vap->va_mode = R_ALL|X_ALL;
1.8 cgd 431: vap->va_type = VLNK;
1.32 mrg 432: vap->va_rdev = 0;
1.8 cgd 433: vap->va_nlink = 1;
434: vap->va_size = strlen(VTOFDESC(vp)->fd_link);
435: break;
436:
437: case Fctty:
1.30 christos 438: vap->va_mode = R_ALL|W_ALL;
1.32 mrg 439: vap->va_type = VCHR;
440: vap->va_rdev = devctty;
1.8 cgd 441: vap->va_nlink = 1;
442: vap->va_size = 0;
443: break;
444:
445: default:
1.30 christos 446: vap->va_mode = R_ALL|X_ALL;
1.8 cgd 447: vap->va_type = VDIR;
1.32 mrg 448: vap->va_rdev = 0;
1.8 cgd 449: vap->va_nlink = 2;
450: vap->va_size = DEV_BSIZE;
451: break;
452: }
1.1 cgd 453: vap->va_uid = 0;
454: vap->va_gid = 0;
1.80 christos 455: vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0];
1.1 cgd 456: vap->va_blocksize = DEV_BSIZE;
1.28 jtc 457: vap->va_atime.tv_sec = boottime.tv_sec;
458: vap->va_atime.tv_nsec = 0;
1.1 cgd 459: vap->va_mtime = vap->va_atime;
1.14 mycroft 460: vap->va_ctime = vap->va_mtime;
1.1 cgd 461: vap->va_gen = 0;
462: vap->va_flags = 0;
463: vap->va_bytes = 0;
1.8 cgd 464: break;
465:
466: case Fdesc:
467: fd = VTOFDESC(vp)->fd_fd;
1.102 ad 468: error = fdesc_attr(fd, vap, ap->a_cred);
1.8 cgd 469: break;
470:
471: default:
472: panic("fdesc_getattr");
1.83 perry 473: break;
1.1 cgd 474: }
475:
476: if (error == 0)
477: vp->v_type = vap->va_type;
1.8 cgd 478:
1.1 cgd 479: return (error);
480: }
481:
1.14 mycroft 482: int
1.105 dsl 483: fdesc_setattr(void *v)
1.30 christos 484: {
1.14 mycroft 485: struct vop_setattr_args /* {
486: struct vnode *a_vp;
487: struct vattr *a_vap;
1.92 elad 488: kauth_cred_t a_cred;
1.30 christos 489: } */ *ap = v;
1.102 ad 490: file_t *fp;
1.1 cgd 491: unsigned fd;
492:
493: /*
494: * Can't mess with the root vnode
495: */
1.14 mycroft 496: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 497: case Fdesc:
498: break;
499:
500: case Fctty:
501: return (0);
502:
503: default:
1.1 cgd 504: return (EACCES);
1.8 cgd 505: }
1.1 cgd 506:
1.14 mycroft 507: fd = VTOFDESC(ap->a_vp)->fd_fd;
1.102 ad 508: if ((fp = fd_getfile(fd)) == NULL)
1.1 cgd 509: return (EBADF);
510:
511: /*
1.68 jmc 512: * XXX: Can't reasonably set the attr's on any types currently.
513: * On vnode's this will cause truncation and socket/pipes make
514: * no sense.
1.1 cgd 515: */
1.102 ad 516: fd_putfile(fd);
1.69 jdolecek 517: return (0);
1.1 cgd 518: }
519:
1.8 cgd 520:
1.25 mycroft 521: struct fdesc_target {
522: ino_t ft_fileno;
523: u_char ft_type;
524: u_char ft_namlen;
1.84 christos 525: const char *ft_name;
1.25 mycroft 526: } fdesc_targets[] = {
527: #define N(s) sizeof(s)-1, s
528: { FD_DEVFD, DT_DIR, N("fd") },
1.27 mycroft 529: { FD_STDIN, DT_LNK, N("stdin") },
530: { FD_STDOUT, DT_LNK, N("stdout") },
531: { FD_STDERR, DT_LNK, N("stderr") },
1.25 mycroft 532: { FD_CTTY, DT_UNKNOWN, N("tty") },
533: #undef N
1.85 christos 534: #define UIO_MX _DIRENT_RECLEN((struct dirent *)NULL, sizeof("stderr") - 1)
1.8 cgd 535: };
1.25 mycroft 536: static int nfdesc_targets = sizeof(fdesc_targets) / sizeof(fdesc_targets[0]);
1.8 cgd 537:
1.14 mycroft 538: int
1.105 dsl 539: fdesc_readdir(void *v)
1.30 christos 540: {
1.14 mycroft 541: struct vop_readdir_args /* {
542: struct vnode *a_vp;
543: struct uio *a_uio;
1.92 elad 544: kauth_cred_t a_cred;
1.22 mycroft 545: int *a_eofflag;
1.44 fvdl 546: off_t **a_cookies;
547: int *a_ncookies;
1.30 christos 548: } */ *ap = v;
1.14 mycroft 549: struct uio *uio = ap->a_uio;
1.25 mycroft 550: struct dirent d;
1.53 sommerfe 551: off_t i;
1.87 christos 552: int j;
1.1 cgd 553: int error;
1.44 fvdl 554: off_t *cookies = NULL;
1.87 christos 555: int ncookies;
1.107 ad 556: fdtab_t *dt;
1.11 ws 557:
1.14 mycroft 558: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 559: case Fctty:
1.87 christos 560: return 0;
1.8 cgd 561:
562: case Fdesc:
1.87 christos 563: return ENOTDIR;
1.30 christos 564:
565: default:
566: break;
1.8 cgd 567: }
1.1 cgd 568:
1.107 ad 569: dt = curlwp->l_fd->fd_dt;
1.8 cgd 570:
1.25 mycroft 571: if (uio->uio_resid < UIO_MX)
1.87 christos 572: return EINVAL;
1.26 mycroft 573: if (uio->uio_offset < 0)
1.87 christos 574: return EINVAL;
1.25 mycroft 575:
576: error = 0;
1.26 mycroft 577: i = uio->uio_offset;
1.87 christos 578: (void)memset(&d, 0, UIO_MX);
1.25 mycroft 579: d.d_reclen = UIO_MX;
1.44 fvdl 580: if (ap->a_ncookies)
1.87 christos 581: ncookies = uio->uio_resid / UIO_MX;
582: else
583: ncookies = 0;
1.25 mycroft 584:
1.14 mycroft 585: if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
1.25 mycroft 586: struct fdesc_target *ft;
1.51 christos 587:
588: if (i >= nfdesc_targets)
1.52 sommerfe 589: return 0;
1.3 cgd 590:
1.44 fvdl 591: if (ap->a_ncookies) {
592: ncookies = min(ncookies, (nfdesc_targets - i));
1.56 thorpej 593: cookies = malloc(ncookies * sizeof(off_t),
1.44 fvdl 594: M_TEMP, M_WAITOK);
595: *ap->a_cookies = cookies;
596: *ap->a_ncookies = ncookies;
597: }
598:
1.87 christos 599: for (ft = &fdesc_targets[i]; uio->uio_resid >= UIO_MX &&
600: i < nfdesc_targets; ft++, i++) {
1.25 mycroft 601: switch (ft->ft_fileno) {
1.8 cgd 602: case FD_CTTY:
1.90 yamt 603: if (cttyvp(curproc) == NULL)
1.8 cgd 604: continue;
605: break;
606:
607: case FD_STDIN:
608: case FD_STDOUT:
609: case FD_STDERR:
1.87 christos 610: if ((ft->ft_fileno - FD_STDIN) >=
1.107 ad 611: dt->dt_nfiles)
1.87 christos 612: continue;
1.107 ad 613: if (dt->dt_ff[ft->ft_fileno - FD_STDIN]
614: == NULL || dt->dt_ff[ft->ft_fileno -
1.102 ad 615: FD_STDIN]->ff_file == NULL)
1.8 cgd 616: continue;
617: break;
618: }
1.25 mycroft 619:
620: d.d_fileno = ft->ft_fileno;
621: d.d_namlen = ft->ft_namlen;
1.87 christos 622: (void)memcpy(d.d_name, ft->ft_name, ft->ft_namlen + 1);
1.25 mycroft 623: d.d_type = ft->ft_type;
624:
1.81 jrf 625: if ((error = uiomove(&d, UIO_MX, uio)) != 0)
1.8 cgd 626: break;
1.44 fvdl 627: if (cookies)
1.26 mycroft 628: *cookies++ = i + 1;
1.3 cgd 629: }
1.25 mycroft 630: } else {
1.102 ad 631: membar_consumer();
1.44 fvdl 632: if (ap->a_ncookies) {
1.107 ad 633: ncookies = min(ncookies, dt->dt_nfiles + 2);
1.56 thorpej 634: cookies = malloc(ncookies * sizeof(off_t),
635: M_TEMP, M_WAITOK);
1.44 fvdl 636: *ap->a_cookies = cookies;
637: *ap->a_ncookies = ncookies;
638: }
1.107 ad 639: for (; i - 2 < dt->dt_nfiles && uio->uio_resid >= UIO_MX; i++) {
1.25 mycroft 640: switch (i) {
641: case 0:
642: case 1:
643: d.d_fileno = FD_ROOT; /* XXX */
644: d.d_namlen = i + 1;
1.87 christos 645: (void)memcpy(d.d_name, "..", d.d_namlen);
1.25 mycroft 646: d.d_name[i + 1] = '\0';
647: d.d_type = DT_DIR;
648: break;
1.83 perry 649:
1.25 mycroft 650: default:
1.87 christos 651: j = (int)i - 2;
1.107 ad 652: if (dt->dt_ff[j] == NULL ||
653: dt->dt_ff[j]->ff_file == NULL)
1.25 mycroft 654: continue;
1.87 christos 655: d.d_fileno = j + FD_STDIN;
1.119 christos 656: d.d_namlen = snprintf(d.d_name,
657: sizeof(d.d_name), "%d", j);
1.25 mycroft 658: d.d_type = DT_UNKNOWN;
659: break;
660: }
1.8 cgd 661:
1.81 jrf 662: if ((error = uiomove(&d, UIO_MX, uio)) != 0)
1.1 cgd 663: break;
1.44 fvdl 664: if (cookies)
1.26 mycroft 665: *cookies++ = i + 1;
1.1 cgd 666: }
1.8 cgd 667: }
668:
1.44 fvdl 669: if (ap->a_ncookies && error) {
1.56 thorpej 670: free(*ap->a_cookies, M_TEMP);
1.44 fvdl 671: *ap->a_ncookies = 0;
672: *ap->a_cookies = NULL;
673: }
674:
1.26 mycroft 675: uio->uio_offset = i;
1.87 christos 676: return error;
1.8 cgd 677: }
678:
1.14 mycroft 679: int
1.105 dsl 680: fdesc_readlink(void *v)
1.30 christos 681: {
1.14 mycroft 682: struct vop_readlink_args /* {
683: struct vnode *a_vp;
684: struct uio *a_uio;
1.92 elad 685: kauth_cred_t a_cred;
1.30 christos 686: } */ *ap = v;
1.14 mycroft 687: struct vnode *vp = ap->a_vp;
1.8 cgd 688: int error;
689:
1.14 mycroft 690: if (vp->v_type != VLNK)
691: return (EPERM);
692:
1.8 cgd 693: if (VTOFDESC(vp)->fd_type == Flink) {
1.120 hannken 694: const char *ln = VTOFDESC(vp)->fd_link;
695: error = uiomove(__UNCONST(ln), strlen(ln), ap->a_uio);
1.8 cgd 696: } else {
697: error = EOPNOTSUPP;
698: }
699:
700: return (error);
701: }
702:
1.14 mycroft 703: int
1.105 dsl 704: fdesc_read(void *v)
1.30 christos 705: {
1.14 mycroft 706: struct vop_read_args /* {
707: struct vnode *a_vp;
708: struct uio *a_uio;
709: int a_ioflag;
1.92 elad 710: kauth_cred_t a_cred;
1.30 christos 711: } */ *ap = v;
1.8 cgd 712: int error = EOPNOTSUPP;
1.49 thorpej 713: struct vnode *vp = ap->a_vp;
1.8 cgd 714:
1.49 thorpej 715: switch (VTOFDESC(vp)->fd_type) {
1.8 cgd 716: case Fctty:
1.110 hannken 717: VOP_UNLOCK(vp);
1.97 ad 718: error = cdev_read(devctty, ap->a_uio, ap->a_ioflag);
1.49 thorpej 719: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.8 cgd 720: break;
721:
722: default:
723: error = EOPNOTSUPP;
724: break;
725: }
1.83 perry 726:
1.8 cgd 727: return (error);
728: }
729:
1.14 mycroft 730: int
1.105 dsl 731: fdesc_write(void *v)
1.30 christos 732: {
1.14 mycroft 733: struct vop_write_args /* {
734: struct vnode *a_vp;
735: struct uio *a_uio;
736: int a_ioflag;
1.92 elad 737: kauth_cred_t a_cred;
1.30 christos 738: } */ *ap = v;
1.8 cgd 739: int error = EOPNOTSUPP;
1.49 thorpej 740: struct vnode *vp = ap->a_vp;
1.8 cgd 741:
1.49 thorpej 742: switch (VTOFDESC(vp)->fd_type) {
1.8 cgd 743: case Fctty:
1.110 hannken 744: VOP_UNLOCK(vp);
1.97 ad 745: error = cdev_write(devctty, ap->a_uio, ap->a_ioflag);
1.49 thorpej 746: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.8 cgd 747: break;
748:
749: default:
750: error = EOPNOTSUPP;
751: break;
752: }
1.83 perry 753:
1.8 cgd 754: return (error);
755: }
756:
1.14 mycroft 757: int
1.105 dsl 758: fdesc_ioctl(void *v)
1.30 christos 759: {
1.14 mycroft 760: struct vop_ioctl_args /* {
761: struct vnode *a_vp;
1.19 cgd 762: u_long a_command;
1.81 jrf 763: void *a_data;
1.14 mycroft 764: int a_fflag;
1.92 elad 765: kauth_cred_t a_cred;
1.30 christos 766: } */ *ap = v;
1.8 cgd 767: int error = EOPNOTSUPP;
768:
1.14 mycroft 769: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 770: case Fctty:
1.97 ad 771: error = cdev_ioctl(devctty, ap->a_command, ap->a_data,
1.100 pooka 772: ap->a_fflag, curlwp);
1.8 cgd 773: break;
774:
775: default:
776: error = EOPNOTSUPP;
777: break;
1.1 cgd 778: }
1.83 perry 779:
1.8 cgd 780: return (error);
781: }
782:
1.14 mycroft 783: int
1.105 dsl 784: fdesc_poll(void *v)
1.30 christos 785: {
1.35 mycroft 786: struct vop_poll_args /* {
1.14 mycroft 787: struct vnode *a_vp;
1.35 mycroft 788: int a_events;
1.30 christos 789: } */ *ap = v;
1.35 mycroft 790: int revents;
1.8 cgd 791:
1.14 mycroft 792: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 793: case Fctty:
1.100 pooka 794: revents = cdev_poll(devctty, ap->a_events, curlwp);
1.8 cgd 795: break;
1.1 cgd 796:
1.8 cgd 797: default:
1.35 mycroft 798: revents = genfs_poll(v);
1.8 cgd 799: break;
800: }
1.34 mycroft 801:
1.35 mycroft 802: return (revents);
1.71 jdolecek 803: }
804:
805: int
1.105 dsl 806: fdesc_kqfilter(void *v)
1.71 jdolecek 807: {
808: struct vop_kqfilter_args /* {
809: struct vnode *a_vp;
810: struct knote *a_kn;
811: } */ *ap = v;
1.102 ad 812: int error, fd;
813: file_t *fp;
1.71 jdolecek 814:
815: switch (VTOFDESC(ap->a_vp)->fd_type) {
816: case Fctty:
1.97 ad 817: error = cdev_kqfilter(devctty, ap->a_kn);
1.71 jdolecek 818: break;
819:
820: case Fdesc:
821: /* just invoke kqfilter for the underlying descriptor */
1.102 ad 822: fd = VTOFDESC(ap->a_vp)->fd_fd;
823: if ((fp = fd_getfile(fd)) == NULL)
1.71 jdolecek 824: return (1);
825: error = (*fp->f_ops->fo_kqfilter)(fp, ap->a_kn);
1.102 ad 826: fd_putfile(fd);
1.71 jdolecek 827: break;
828:
829: default:
830: return (genfs_kqfilter(v));
831: }
832:
833: return (error);
1.1 cgd 834: }
835:
1.14 mycroft 836: int
1.105 dsl 837: fdesc_inactive(void *v)
1.30 christos 838: {
1.14 mycroft 839: struct vop_inactive_args /* {
840: struct vnode *a_vp;
1.30 christos 841: } */ *ap = v;
1.14 mycroft 842: struct vnode *vp = ap->a_vp;
1.120 hannken 843: struct fdescnode *fd = VTOFDESC(vp);
1.14 mycroft 844:
1.1 cgd 845: /*
846: * Clear out the v_type field to avoid
1.120 hannken 847: * nasty things happening on reclaim.
1.1 cgd 848: */
1.120 hannken 849: if (fd->fd_type == Fctty || fd->fd_type == Fdesc)
850: vp->v_type = VNON;
1.110 hannken 851: VOP_UNLOCK(vp);
1.1 cgd 852: return (0);
853: }
854:
1.14 mycroft 855: int
1.105 dsl 856: fdesc_reclaim(void *v)
1.30 christos 857: {
1.14 mycroft 858: struct vop_reclaim_args /* {
859: struct vnode *a_vp;
1.30 christos 860: } */ *ap = v;
1.14 mycroft 861: struct vnode *vp = ap->a_vp;
1.17 mycroft 862: struct fdescnode *fd = VTOFDESC(vp);
1.14 mycroft 863:
1.120 hannken 864: vp->v_data = NULL;
865: vcache_remove(vp->v_mount, &fd->fd_ix, sizeof(fd->fd_ix));
866: kmem_free(fd, sizeof(struct fdescnode));
1.14 mycroft 867:
868: return (0);
869: }
870:
871: /*
872: * Return POSIX pathconf information applicable to special devices.
873: */
1.30 christos 874: int
1.105 dsl 875: fdesc_pathconf(void *v)
1.30 christos 876: {
1.14 mycroft 877: struct vop_pathconf_args /* {
878: struct vnode *a_vp;
879: int a_name;
1.18 cgd 880: register_t *a_retval;
1.30 christos 881: } */ *ap = v;
1.8 cgd 882:
1.14 mycroft 883: switch (ap->a_name) {
884: case _PC_LINK_MAX:
885: *ap->a_retval = LINK_MAX;
886: return (0);
887: case _PC_MAX_CANON:
888: *ap->a_retval = MAX_CANON;
889: return (0);
890: case _PC_MAX_INPUT:
891: *ap->a_retval = MAX_INPUT;
892: return (0);
893: case _PC_PIPE_BUF:
894: *ap->a_retval = PIPE_BUF;
895: return (0);
896: case _PC_CHOWN_RESTRICTED:
897: *ap->a_retval = 1;
898: return (0);
899: case _PC_VDISABLE:
900: *ap->a_retval = _POSIX_VDISABLE;
1.45 kleink 901: return (0);
902: case _PC_SYNC_IO:
903: *ap->a_retval = 1;
1.14 mycroft 904: return (0);
905: default:
906: return (EINVAL);
1.8 cgd 907: }
1.14 mycroft 908: /* NOTREACHED */
1.8 cgd 909: }
910:
1.1 cgd 911: /*
912: * Print out the contents of a /dev/fd vnode.
913: */
914: /* ARGSUSED */
1.14 mycroft 915: int
1.94 christos 916: fdesc_print(void *v)
1.1 cgd 917: {
1.37 christos 918: printf("tag VT_NON, fdesc vnode\n");
1.14 mycroft 919: return (0);
920: }
921:
922: int
1.105 dsl 923: fdesc_link(void *v)
1.30 christos 924: {
1.126 ! riastrad 925: struct vop_link_v2_args /* {
1.29 mycroft 926: struct vnode *a_dvp;
1.83 perry 927: struct vnode *a_vp;
1.29 mycroft 928: struct componentname *a_cnp;
1.30 christos 929: } */ *ap = v;
1.83 perry 930:
1.29 mycroft 931: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
932: return (EROFS);
933: }
934:
935: int
1.105 dsl 936: fdesc_symlink(void *v)
1.30 christos 937: {
1.116 hannken 938: struct vop_symlink_v3_args /* {
1.29 mycroft 939: struct vnode *a_dvp;
940: struct vnode **a_vpp;
941: struct componentname *a_cnp;
942: struct vattr *a_vap;
943: char *a_target;
1.30 christos 944: } */ *ap = v;
1.83 perry 945:
1.29 mycroft 946: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
947: return (EROFS);
1.1 cgd 948: }
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