Annotation of src/sys/miscfs/fdesc/fdesc_vnops.c, Revision 1.106
1.106 ! cegger 1: /* $NetBSD: fdesc_vnops.c,v 1.105 2009/03/14 15:36:22 dsl 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>
1.106 ! cegger 44: __KERNEL_RCSID(0, "$NetBSD: fdesc_vnops.c,v 1.105 2009/03/14 15:36:22 dsl 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:
72: #define FDL_WANT 0x01
73: #define FDL_LOCKED 0x02
1.14 mycroft 74: static int fdcache_lock;
75:
76: dev_t devctty;
1.8 cgd 77:
78: #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
79: FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
80: #endif
81:
1.16 mycroft 82: #define NFDCACHE 4
1.14 mycroft 83:
1.17 mycroft 84: #define FD_NHASH(ix) \
85: (&fdhashtbl[(ix) & fdhash])
86: LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
87: u_long fdhash;
1.14 mycroft 88:
1.86 xtraeme 89: int fdesc_lookup(void *);
1.74 jdolecek 90: #define fdesc_create genfs_eopnotsupp
91: #define fdesc_mknod genfs_eopnotsupp
1.86 xtraeme 92: int fdesc_open(void *);
1.34 mycroft 93: #define fdesc_close genfs_nullop
94: #define fdesc_access genfs_nullop
1.86 xtraeme 95: int fdesc_getattr(void *);
96: int fdesc_setattr(void *);
97: int fdesc_read(void *);
98: int fdesc_write(void *);
99: int fdesc_ioctl(void *);
100: int fdesc_poll(void *);
101: int fdesc_kqfilter(void *);
1.34 mycroft 102: #define fdesc_mmap genfs_eopnotsupp
1.50 wrstuden 103: #define fdesc_fcntl genfs_fcntl
1.34 mycroft 104: #define fdesc_fsync genfs_nullop
1.40 fvdl 105: #define fdesc_seek genfs_seek
1.74 jdolecek 106: #define fdesc_remove genfs_eopnotsupp
1.86 xtraeme 107: int fdesc_link(void *);
1.74 jdolecek 108: #define fdesc_rename genfs_eopnotsupp
109: #define fdesc_mkdir genfs_eopnotsupp
110: #define fdesc_rmdir genfs_eopnotsupp
1.86 xtraeme 111: int fdesc_symlink(void *);
112: int fdesc_readdir(void *);
113: int fdesc_readlink(void *);
1.34 mycroft 114: #define fdesc_abortop genfs_abortop
1.86 xtraeme 115: int fdesc_inactive(void *);
116: int fdesc_reclaim(void *);
1.48 wrstuden 117: #define fdesc_lock genfs_lock
118: #define fdesc_unlock genfs_unlock
1.34 mycroft 119: #define fdesc_bmap genfs_badop
120: #define fdesc_strategy genfs_badop
1.86 xtraeme 121: int fdesc_print(void *);
122: int fdesc_pathconf(void *);
1.48 wrstuden 123: #define fdesc_islocked genfs_islocked
1.47 kleink 124: #define fdesc_advlock genfs_einval
1.34 mycroft 125: #define fdesc_bwrite genfs_eopnotsupp
1.44 fvdl 126: #define fdesc_revoke genfs_revoke
1.67 chs 127: #define fdesc_putpages genfs_null_putpages
1.30 christos 128:
1.102 ad 129: static int fdesc_attr(int, struct vattr *, kauth_cred_t);
1.30 christos 130:
1.86 xtraeme 131: int (**fdesc_vnodeop_p)(void *);
1.58 jdolecek 132: const struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
1.30 christos 133: { &vop_default_desc, vn_default_error },
1.34 mycroft 134: { &vop_lookup_desc, fdesc_lookup }, /* lookup */
135: { &vop_create_desc, fdesc_create }, /* create */
136: { &vop_mknod_desc, fdesc_mknod }, /* mknod */
137: { &vop_open_desc, fdesc_open }, /* open */
138: { &vop_close_desc, fdesc_close }, /* close */
139: { &vop_access_desc, fdesc_access }, /* access */
140: { &vop_getattr_desc, fdesc_getattr }, /* getattr */
141: { &vop_setattr_desc, fdesc_setattr }, /* setattr */
142: { &vop_read_desc, fdesc_read }, /* read */
143: { &vop_write_desc, fdesc_write }, /* write */
144: { &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */
1.50 wrstuden 145: { &vop_fcntl_desc, fdesc_fcntl }, /* fcntl */
1.35 mycroft 146: { &vop_poll_desc, fdesc_poll }, /* poll */
1.71 jdolecek 147: { &vop_kqfilter_desc, fdesc_kqfilter }, /* kqfilter */
1.44 fvdl 148: { &vop_revoke_desc, fdesc_revoke }, /* revoke */
1.34 mycroft 149: { &vop_mmap_desc, fdesc_mmap }, /* mmap */
150: { &vop_fsync_desc, fdesc_fsync }, /* fsync */
151: { &vop_seek_desc, fdesc_seek }, /* seek */
152: { &vop_remove_desc, fdesc_remove }, /* remove */
153: { &vop_link_desc, fdesc_link }, /* link */
154: { &vop_rename_desc, fdesc_rename }, /* rename */
155: { &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */
156: { &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */
157: { &vop_symlink_desc, fdesc_symlink }, /* symlink */
158: { &vop_readdir_desc, fdesc_readdir }, /* readdir */
159: { &vop_readlink_desc, fdesc_readlink }, /* readlink */
160: { &vop_abortop_desc, fdesc_abortop }, /* abortop */
161: { &vop_inactive_desc, fdesc_inactive }, /* inactive */
162: { &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */
163: { &vop_lock_desc, fdesc_lock }, /* lock */
164: { &vop_unlock_desc, fdesc_unlock }, /* unlock */
165: { &vop_bmap_desc, fdesc_bmap }, /* bmap */
166: { &vop_strategy_desc, fdesc_strategy }, /* strategy */
167: { &vop_print_desc, fdesc_print }, /* print */
168: { &vop_islocked_desc, fdesc_islocked }, /* islocked */
169: { &vop_pathconf_desc, fdesc_pathconf }, /* pathconf */
170: { &vop_advlock_desc, fdesc_advlock }, /* advlock */
171: { &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */
1.67 chs 172: { &vop_putpages_desc, fdesc_putpages }, /* putpages */
173: { NULL, NULL }
1.30 christos 174: };
175:
1.58 jdolecek 176: const struct vnodeopv_desc fdesc_vnodeop_opv_desc =
1.30 christos 177: { &fdesc_vnodeop_p, fdesc_vnodeop_entries };
178:
1.70 gehenna 179: extern const struct cdevsw ctty_cdevsw;
180:
1.14 mycroft 181: /*
182: * Initialise cache headers
183: */
1.30 christos 184: void
1.106 ! cegger 185: fdesc_init(void)
1.14 mycroft 186: {
1.32 mrg 187: int cttymajor;
1.14 mycroft 188:
1.32 mrg 189: /* locate the major number */
1.70 gehenna 190: cttymajor = cdevsw_lookup_major(&ctty_cdevsw);
1.32 mrg 191: devctty = makedev(cttymajor, 0);
1.103 ad 192: fdhashtbl = hashinit(NFDCACHE, HASH_LIST, true, &fdhash);
1.54 jdolecek 193: }
194:
195: /*
196: * Free hash table.
197: */
198: void
1.106 ! cegger 199: fdesc_done(void)
1.54 jdolecek 200: {
1.103 ad 201: hashdone(fdhashtbl, HASH_LIST, fdhash);
1.14 mycroft 202: }
203:
1.48 wrstuden 204: /*
205: * Return a locked vnode of the correct type.
206: */
1.14 mycroft 207: int
1.105 dsl 208: fdesc_allocvp(fdntype ftype, int ix, struct mount *mp, struct vnode **vpp)
1.8 cgd 209: {
1.17 mycroft 210: struct fdhashhead *fc;
1.14 mycroft 211: struct fdescnode *fd;
1.8 cgd 212: int error = 0;
213:
1.17 mycroft 214: fc = FD_NHASH(ix);
1.8 cgd 215: loop:
1.17 mycroft 216: for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
1.14 mycroft 217: if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
1.76 thorpej 218: if (vget(fd->fd_vnode, LK_EXCLUSIVE))
1.8 cgd 219: goto loop;
1.14 mycroft 220: *vpp = fd->fd_vnode;
1.8 cgd 221: return (error);
222: }
223: }
224:
225: /*
226: * otherwise lock the array while we call getnewvnode
227: * since that can block.
1.83 perry 228: */
1.14 mycroft 229: if (fdcache_lock & FDL_LOCKED) {
230: fdcache_lock |= FDL_WANT;
1.55 thorpej 231: (void) tsleep(&fdcache_lock, PINOD, "fdcache", 0);
1.8 cgd 232: goto loop;
233: }
1.14 mycroft 234: fdcache_lock |= FDL_LOCKED;
1.1 cgd 235:
1.14 mycroft 236: error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, vpp);
1.8 cgd 237: if (error)
238: goto out;
1.104 cegger 239: fd = malloc(sizeof(struct fdescnode), M_TEMP, M_WAITOK);
1.14 mycroft 240: (*vpp)->v_data = fd;
241: fd->fd_vnode = *vpp;
242: fd->fd_type = ftype;
243: fd->fd_fd = -1;
244: fd->fd_link = 0;
245: fd->fd_ix = ix;
1.98 pooka 246: uvm_vnp_setsize(*vpp, 0);
1.48 wrstuden 247: VOP_LOCK(*vpp, LK_EXCLUSIVE);
1.17 mycroft 248: LIST_INSERT_HEAD(fc, fd, fd_hash);
1.8 cgd 249:
250: out:;
1.14 mycroft 251: fdcache_lock &= ~FDL_LOCKED;
1.8 cgd 252:
1.14 mycroft 253: if (fdcache_lock & FDL_WANT) {
254: fdcache_lock &= ~FDL_WANT;
1.81 jrf 255: wakeup(&fdcache_lock);
1.8 cgd 256: }
257:
258: return (error);
259: }
1.1 cgd 260:
261: /*
262: * vp is the current namei directory
263: * ndp is the name to locate in that directory...
264: */
1.14 mycroft 265: int
1.105 dsl 266: fdesc_lookup(void *v)
1.30 christos 267: {
1.14 mycroft 268: struct vop_lookup_args /* {
269: struct vnode * a_dvp;
270: struct vnode ** a_vpp;
271: struct componentname * a_cnp;
1.30 christos 272: } */ *ap = v;
1.14 mycroft 273: struct vnode **vpp = ap->a_vpp;
274: struct vnode *dvp = ap->a_dvp;
1.44 fvdl 275: struct componentname *cnp = ap->a_cnp;
1.101 pooka 276: struct lwp *l = curlwp;
1.44 fvdl 277: const char *pname = cnp->cn_nameptr;
1.89 christos 278: struct proc *p = l->l_proc;
1.102 ad 279: filedesc_t *fdp = p->p_fd;
280: int numfiles = fdp->fd_nfiles;
1.30 christos 281: unsigned fd = 0;
1.1 cgd 282: int error;
283: struct vnode *fvp;
1.84 christos 284: const char *ln;
1.1 cgd 285:
1.44 fvdl 286: if (cnp->cn_namelen == 1 && *pname == '.') {
1.14 mycroft 287: *vpp = dvp;
1.44 fvdl 288: VREF(dvp);
1.1 cgd 289: return (0);
290: }
291:
1.8 cgd 292: switch (VTOFDESC(dvp)->fd_type) {
293: default:
294: case Flink:
295: case Fdesc:
296: case Fctty:
297: error = ENOTDIR;
298: goto bad;
299:
300: case Froot:
1.46 perry 301: if (cnp->cn_namelen == 2 && memcmp(pname, "fd", 2) == 0) {
1.8 cgd 302: error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp);
303: if (error)
304: goto bad;
1.14 mycroft 305: *vpp = fvp;
1.8 cgd 306: fvp->v_type = VDIR;
1.48 wrstuden 307: goto good;
1.8 cgd 308: }
309:
1.46 perry 310: if (cnp->cn_namelen == 3 && memcmp(pname, "tty", 3) == 0) {
1.8 cgd 311: struct vnode *ttyvp = cttyvp(p);
312: if (ttyvp == NULL) {
313: error = ENXIO;
314: goto bad;
315: }
316: error = fdesc_allocvp(Fctty, FD_CTTY, dvp->v_mount, &fvp);
317: if (error)
318: goto bad;
1.14 mycroft 319: *vpp = fvp;
1.32 mrg 320: fvp->v_type = VCHR;
1.48 wrstuden 321: goto good;
1.8 cgd 322: }
323:
324: ln = 0;
1.44 fvdl 325: switch (cnp->cn_namelen) {
1.8 cgd 326: case 5:
1.46 perry 327: if (memcmp(pname, "stdin", 5) == 0) {
1.8 cgd 328: ln = "fd/0";
329: fd = FD_STDIN;
330: }
1.1 cgd 331: break;
1.8 cgd 332: case 6:
1.46 perry 333: if (memcmp(pname, "stdout", 6) == 0) {
1.8 cgd 334: ln = "fd/1";
335: fd = FD_STDOUT;
336: } else
1.46 perry 337: if (memcmp(pname, "stderr", 6) == 0) {
1.8 cgd 338: ln = "fd/2";
339: fd = FD_STDERR;
340: }
341: break;
342: }
343:
344: if (ln) {
345: error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp);
346: if (error)
347: goto bad;
1.84 christos 348: /* XXXUNCONST */
349: VTOFDESC(fvp)->fd_link = __UNCONST(ln);
1.14 mycroft 350: *vpp = fvp;
1.8 cgd 351: fvp->v_type = VLNK;
1.48 wrstuden 352: goto good;
1.8 cgd 353: } else {
354: error = ENOENT;
355: goto bad;
356: }
357:
1.14 mycroft 358: /* FALL THROUGH */
1.8 cgd 359:
360: case Fdevfd:
1.46 perry 361: if (cnp->cn_namelen == 2 && memcmp(pname, "..", 2) == 0) {
1.48 wrstuden 362: VOP_UNLOCK(dvp, 0);
1.76 thorpej 363: error = fdesc_root(dvp->v_mount, vpp);
1.95 chs 364: vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1.44 fvdl 365: if (error)
366: goto bad;
1.48 wrstuden 367: return (error);
1.8 cgd 368: }
369:
370: fd = 0;
371: while (*pname >= '0' && *pname <= '9') {
372: fd = 10 * fd + *pname++ - '0';
1.84 christos 373: if (fd >= numfiles)
1.8 cgd 374: break;
375: }
1.1 cgd 376:
1.8 cgd 377: if (*pname != '\0') {
378: error = ENOENT;
379: goto bad;
380: }
1.1 cgd 381:
1.102 ad 382: mutex_enter(&fdp->fd_lock);
383: if (fd >= numfiles ||fdp->fd_ofiles[fd] == NULL ||
384: fdp->fd_ofiles[fd]->ff_file == NULL) {
385: mutex_exit(&fdp->fd_lock);
1.8 cgd 386: error = EBADF;
387: goto bad;
388: }
1.102 ad 389: mutex_exit(&fdp->fd_lock);
1.1 cgd 390:
1.8 cgd 391: error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
392: if (error)
393: goto bad;
394: VTOFDESC(fvp)->fd_fd = fd;
1.14 mycroft 395: *vpp = fvp;
1.48 wrstuden 396: goto good;
1.8 cgd 397: }
1.1 cgd 398:
1.95 chs 399: bad:
1.14 mycroft 400: *vpp = NULL;
1.1 cgd 401: return (error);
1.48 wrstuden 402:
1.95 chs 403: good:
1.48 wrstuden 404: return (0);
1.1 cgd 405: }
406:
1.14 mycroft 407: int
1.105 dsl 408: fdesc_open(void *v)
1.30 christos 409: {
1.14 mycroft 410: struct vop_open_args /* {
411: struct vnode *a_vp;
412: int a_mode;
1.92 elad 413: kauth_cred_t a_cred;
1.30 christos 414: } */ *ap = v;
1.14 mycroft 415: struct vnode *vp = ap->a_vp;
1.8 cgd 416:
417: switch (VTOFDESC(vp)->fd_type) {
418: case Fdesc:
1.23 mycroft 419: /*
1.79 jdolecek 420: * XXX Kludge: set dupfd to contain the value of the
1.83 perry 421: * the file descriptor being sought for duplication. The error
1.23 mycroft 422: * return ensures that the vnode for this device will be
423: * released by vn_open. Open will detect this special error and
424: * take the actions in dupfdopen. Other callers of vn_open or
425: * VOP_OPEN will simply report the error.
426: */
1.79 jdolecek 427: curlwp->l_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
1.82 christos 428: return EDUPFD;
1.1 cgd 429:
1.8 cgd 430: case Fctty:
1.100 pooka 431: return cdev_open(devctty, ap->a_mode, 0, curlwp);
1.30 christos 432: case Froot:
433: case Fdevfd:
434: case Flink:
435: break;
1.8 cgd 436: }
1.1 cgd 437:
1.21 mycroft 438: return (0);
1.1 cgd 439: }
440:
441: static int
1.105 dsl 442: fdesc_attr(int fd, struct vattr *vap, kauth_cred_t cred)
1.1 cgd 443: {
1.102 ad 444: file_t *fp;
1.8 cgd 445: struct stat stb;
1.1 cgd 446: int error;
447:
1.102 ad 448: if ((fp = fd_getfile(fd)) == NULL)
1.1 cgd 449: return (EBADF);
450:
451: switch (fp->f_type) {
452: case DTYPE_VNODE:
1.100 pooka 453: error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred);
1.8 cgd 454: if (error == 0 && vap->va_type == VDIR) {
455: /*
1.22 mycroft 456: * directories can cause loops in the namespace,
457: * so turn off the 'x' bits to avoid trouble.
1.8 cgd 458: */
1.41 mycroft 459: vap->va_mode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
1.8 cgd 460: }
1.1 cgd 461: break;
462:
1.69 jdolecek 463: default:
464: memset(&stb, 0, sizeof(stb));
1.102 ad 465: error = (*fp->f_ops->fo_stat)(fp, &stb);
1.69 jdolecek 466: if (error)
467: break;
468:
469: vattr_null(vap);
470: switch(fp->f_type) {
471: case DTYPE_SOCKET:
472: vap->va_type = VSOCK;
473: break;
474: case DTYPE_PIPE:
475: vap->va_type = VFIFO;
476: break;
477: default:
478: /* use VNON perhaps? */
479: vap->va_type = VBAD;
480: break;
1.8 cgd 481: }
1.69 jdolecek 482: vap->va_mode = stb.st_mode;
483: vap->va_nlink = stb.st_nlink;
484: vap->va_uid = stb.st_uid;
485: vap->va_gid = stb.st_gid;
486: vap->va_fsid = stb.st_dev;
487: vap->va_fileid = stb.st_ino;
488: vap->va_size = stb.st_size;
489: vap->va_blocksize = stb.st_blksize;
490: vap->va_atime = stb.st_atimespec;
491: vap->va_mtime = stb.st_mtimespec;
492: vap->va_ctime = stb.st_ctimespec;
493: vap->va_gen = stb.st_gen;
494: vap->va_flags = stb.st_flags;
495: vap->va_rdev = stb.st_rdev;
496: vap->va_bytes = stb.st_blocks * stb.st_blksize;
1.1 cgd 497: break;
498: }
499:
1.102 ad 500: fd_putfile(fd);
1.1 cgd 501: return (error);
502: }
503:
1.14 mycroft 504: int
1.105 dsl 505: fdesc_getattr(void *v)
1.30 christos 506: {
1.14 mycroft 507: struct vop_getattr_args /* {
508: struct vnode *a_vp;
509: struct vattr *a_vap;
1.92 elad 510: kauth_cred_t a_cred;
1.89 christos 511: struct lwp *a_l;
1.30 christos 512: } */ *ap = v;
1.14 mycroft 513: struct vnode *vp = ap->a_vp;
514: struct vattr *vap = ap->a_vap;
1.1 cgd 515: unsigned fd;
1.8 cgd 516: int error = 0;
1.1 cgd 517:
1.8 cgd 518: switch (VTOFDESC(vp)->fd_type) {
519: case Froot:
520: case Fdevfd:
521: case Flink:
522: case Fctty:
1.33 mrg 523: VATTR_NULL(vap);
1.8 cgd 524: vap->va_fileid = VTOFDESC(vp)->fd_ix;
525:
1.30 christos 526: #define R_ALL (S_IRUSR|S_IRGRP|S_IROTH)
527: #define W_ALL (S_IWUSR|S_IWGRP|S_IWOTH)
528: #define X_ALL (S_IXUSR|S_IXGRP|S_IXOTH)
529:
1.8 cgd 530: switch (VTOFDESC(vp)->fd_type) {
531: case Flink:
1.30 christos 532: vap->va_mode = R_ALL|X_ALL;
1.8 cgd 533: vap->va_type = VLNK;
1.32 mrg 534: vap->va_rdev = 0;
1.8 cgd 535: vap->va_nlink = 1;
536: vap->va_size = strlen(VTOFDESC(vp)->fd_link);
537: break;
538:
539: case Fctty:
1.30 christos 540: vap->va_mode = R_ALL|W_ALL;
1.32 mrg 541: vap->va_type = VCHR;
542: vap->va_rdev = devctty;
1.8 cgd 543: vap->va_nlink = 1;
544: vap->va_size = 0;
545: break;
546:
547: default:
1.30 christos 548: vap->va_mode = R_ALL|X_ALL;
1.8 cgd 549: vap->va_type = VDIR;
1.32 mrg 550: vap->va_rdev = 0;
1.8 cgd 551: vap->va_nlink = 2;
552: vap->va_size = DEV_BSIZE;
553: break;
554: }
1.1 cgd 555: vap->va_uid = 0;
556: vap->va_gid = 0;
1.80 christos 557: vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0];
1.1 cgd 558: vap->va_blocksize = DEV_BSIZE;
1.28 jtc 559: vap->va_atime.tv_sec = boottime.tv_sec;
560: vap->va_atime.tv_nsec = 0;
1.1 cgd 561: vap->va_mtime = vap->va_atime;
1.14 mycroft 562: vap->va_ctime = vap->va_mtime;
1.1 cgd 563: vap->va_gen = 0;
564: vap->va_flags = 0;
565: vap->va_bytes = 0;
1.8 cgd 566: break;
567:
568: case Fdesc:
569: fd = VTOFDESC(vp)->fd_fd;
1.102 ad 570: error = fdesc_attr(fd, vap, ap->a_cred);
1.8 cgd 571: break;
572:
573: default:
574: panic("fdesc_getattr");
1.83 perry 575: break;
1.1 cgd 576: }
577:
578: if (error == 0)
579: vp->v_type = vap->va_type;
1.8 cgd 580:
1.1 cgd 581: return (error);
582: }
583:
1.14 mycroft 584: int
1.105 dsl 585: fdesc_setattr(void *v)
1.30 christos 586: {
1.14 mycroft 587: struct vop_setattr_args /* {
588: struct vnode *a_vp;
589: struct vattr *a_vap;
1.92 elad 590: kauth_cred_t a_cred;
1.30 christos 591: } */ *ap = v;
1.102 ad 592: file_t *fp;
1.1 cgd 593: unsigned fd;
594:
595: /*
596: * Can't mess with the root vnode
597: */
1.14 mycroft 598: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 599: case Fdesc:
600: break;
601:
602: case Fctty:
603: return (0);
604:
605: default:
1.1 cgd 606: return (EACCES);
1.8 cgd 607: }
1.1 cgd 608:
1.14 mycroft 609: fd = VTOFDESC(ap->a_vp)->fd_fd;
1.102 ad 610: if ((fp = fd_getfile(fd)) == NULL)
1.1 cgd 611: return (EBADF);
612:
613: /*
1.68 jmc 614: * XXX: Can't reasonably set the attr's on any types currently.
615: * On vnode's this will cause truncation and socket/pipes make
616: * no sense.
1.1 cgd 617: */
1.102 ad 618: fd_putfile(fd);
1.69 jdolecek 619: return (0);
1.1 cgd 620: }
621:
1.8 cgd 622:
1.25 mycroft 623: struct fdesc_target {
624: ino_t ft_fileno;
625: u_char ft_type;
626: u_char ft_namlen;
1.84 christos 627: const char *ft_name;
1.25 mycroft 628: } fdesc_targets[] = {
629: #define N(s) sizeof(s)-1, s
630: { FD_DEVFD, DT_DIR, N("fd") },
1.27 mycroft 631: { FD_STDIN, DT_LNK, N("stdin") },
632: { FD_STDOUT, DT_LNK, N("stdout") },
633: { FD_STDERR, DT_LNK, N("stderr") },
1.25 mycroft 634: { FD_CTTY, DT_UNKNOWN, N("tty") },
635: #undef N
1.85 christos 636: #define UIO_MX _DIRENT_RECLEN((struct dirent *)NULL, sizeof("stderr") - 1)
1.8 cgd 637: };
1.25 mycroft 638: static int nfdesc_targets = sizeof(fdesc_targets) / sizeof(fdesc_targets[0]);
1.8 cgd 639:
1.14 mycroft 640: int
1.105 dsl 641: fdesc_readdir(void *v)
1.30 christos 642: {
1.14 mycroft 643: struct vop_readdir_args /* {
644: struct vnode *a_vp;
645: struct uio *a_uio;
1.92 elad 646: kauth_cred_t a_cred;
1.22 mycroft 647: int *a_eofflag;
1.44 fvdl 648: off_t **a_cookies;
649: int *a_ncookies;
1.30 christos 650: } */ *ap = v;
1.14 mycroft 651: struct uio *uio = ap->a_uio;
1.25 mycroft 652: struct dirent d;
1.102 ad 653: filedesc_t *fdp;
1.53 sommerfe 654: off_t i;
1.87 christos 655: int j;
1.1 cgd 656: int error;
1.44 fvdl 657: off_t *cookies = NULL;
1.87 christos 658: int ncookies;
1.11 ws 659:
1.14 mycroft 660: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 661: case Fctty:
1.87 christos 662: return 0;
1.8 cgd 663:
664: case Fdesc:
1.87 christos 665: return ENOTDIR;
1.30 christos 666:
667: default:
668: break;
1.8 cgd 669: }
1.1 cgd 670:
1.90 yamt 671: fdp = curproc->p_fd;
1.8 cgd 672:
1.25 mycroft 673: if (uio->uio_resid < UIO_MX)
1.87 christos 674: return EINVAL;
1.26 mycroft 675: if (uio->uio_offset < 0)
1.87 christos 676: return EINVAL;
1.25 mycroft 677:
678: error = 0;
1.26 mycroft 679: i = uio->uio_offset;
1.87 christos 680: (void)memset(&d, 0, UIO_MX);
1.25 mycroft 681: d.d_reclen = UIO_MX;
1.44 fvdl 682: if (ap->a_ncookies)
1.87 christos 683: ncookies = uio->uio_resid / UIO_MX;
684: else
685: ncookies = 0;
1.25 mycroft 686:
1.14 mycroft 687: if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
1.25 mycroft 688: struct fdesc_target *ft;
1.51 christos 689:
690: if (i >= nfdesc_targets)
1.52 sommerfe 691: return 0;
1.3 cgd 692:
1.44 fvdl 693: if (ap->a_ncookies) {
694: ncookies = min(ncookies, (nfdesc_targets - i));
1.56 thorpej 695: cookies = malloc(ncookies * sizeof(off_t),
1.44 fvdl 696: M_TEMP, M_WAITOK);
697: *ap->a_cookies = cookies;
698: *ap->a_ncookies = ncookies;
699: }
700:
1.87 christos 701: for (ft = &fdesc_targets[i]; uio->uio_resid >= UIO_MX &&
702: i < nfdesc_targets; ft++, i++) {
1.25 mycroft 703: switch (ft->ft_fileno) {
1.8 cgd 704: case FD_CTTY:
1.90 yamt 705: if (cttyvp(curproc) == NULL)
1.8 cgd 706: continue;
707: break;
708:
709: case FD_STDIN:
710: case FD_STDOUT:
711: case FD_STDERR:
1.87 christos 712: if (fdp == NULL)
1.8 cgd 713: continue;
1.87 christos 714: if ((ft->ft_fileno - FD_STDIN) >=
715: fdp->fd_nfiles)
716: continue;
1.102 ad 717: membar_consumer();
1.87 christos 718: if (fdp->fd_ofiles[ft->ft_fileno - FD_STDIN]
1.102 ad 719: == NULL || fdp->fd_ofiles[ft->ft_fileno -
720: FD_STDIN]->ff_file == NULL)
1.8 cgd 721: continue;
722: break;
723: }
1.25 mycroft 724:
725: d.d_fileno = ft->ft_fileno;
726: d.d_namlen = ft->ft_namlen;
1.87 christos 727: (void)memcpy(d.d_name, ft->ft_name, ft->ft_namlen + 1);
1.25 mycroft 728: d.d_type = ft->ft_type;
729:
1.81 jrf 730: if ((error = uiomove(&d, UIO_MX, uio)) != 0)
1.8 cgd 731: break;
1.44 fvdl 732: if (cookies)
1.26 mycroft 733: *cookies++ = i + 1;
1.3 cgd 734: }
1.25 mycroft 735: } else {
1.87 christos 736: int nfdp = fdp ? fdp->fd_nfiles : 0;
1.102 ad 737: membar_consumer();
1.44 fvdl 738: if (ap->a_ncookies) {
1.87 christos 739: ncookies = min(ncookies, nfdp + 2);
1.56 thorpej 740: cookies = malloc(ncookies * sizeof(off_t),
741: M_TEMP, M_WAITOK);
1.44 fvdl 742: *ap->a_cookies = cookies;
743: *ap->a_ncookies = ncookies;
744: }
1.87 christos 745: for (; i - 2 < nfdp && uio->uio_resid >= UIO_MX; i++) {
1.25 mycroft 746: switch (i) {
747: case 0:
748: case 1:
749: d.d_fileno = FD_ROOT; /* XXX */
750: d.d_namlen = i + 1;
1.87 christos 751: (void)memcpy(d.d_name, "..", d.d_namlen);
1.25 mycroft 752: d.d_name[i + 1] = '\0';
753: d.d_type = DT_DIR;
754: break;
1.83 perry 755:
1.25 mycroft 756: default:
1.87 christos 757: KASSERT(fdp != NULL);
758: j = (int)i - 2;
1.91 christos 759: if (fdp == NULL || fdp->fd_ofiles[j] == NULL ||
1.102 ad 760: fdp->fd_ofiles[j]->ff_file == NULL)
1.25 mycroft 761: continue;
1.87 christos 762: d.d_fileno = j + FD_STDIN;
763: d.d_namlen = sprintf(d.d_name, "%d", j);
1.25 mycroft 764: d.d_type = DT_UNKNOWN;
765: break;
766: }
1.8 cgd 767:
1.81 jrf 768: if ((error = uiomove(&d, UIO_MX, uio)) != 0)
1.1 cgd 769: break;
1.44 fvdl 770: if (cookies)
1.26 mycroft 771: *cookies++ = i + 1;
1.1 cgd 772: }
1.8 cgd 773: }
774:
1.44 fvdl 775: if (ap->a_ncookies && error) {
1.56 thorpej 776: free(*ap->a_cookies, M_TEMP);
1.44 fvdl 777: *ap->a_ncookies = 0;
778: *ap->a_cookies = NULL;
779: }
780:
1.26 mycroft 781: uio->uio_offset = i;
1.87 christos 782: return error;
1.8 cgd 783: }
784:
1.14 mycroft 785: int
1.105 dsl 786: fdesc_readlink(void *v)
1.30 christos 787: {
1.14 mycroft 788: struct vop_readlink_args /* {
789: struct vnode *a_vp;
790: struct uio *a_uio;
1.92 elad 791: kauth_cred_t a_cred;
1.30 christos 792: } */ *ap = v;
1.14 mycroft 793: struct vnode *vp = ap->a_vp;
1.8 cgd 794: int error;
795:
1.14 mycroft 796: if (vp->v_type != VLNK)
797: return (EPERM);
798:
1.8 cgd 799: if (VTOFDESC(vp)->fd_type == Flink) {
800: char *ln = VTOFDESC(vp)->fd_link;
1.14 mycroft 801: error = uiomove(ln, strlen(ln), ap->a_uio);
1.8 cgd 802: } else {
803: error = EOPNOTSUPP;
804: }
805:
806: return (error);
807: }
808:
1.14 mycroft 809: int
1.105 dsl 810: fdesc_read(void *v)
1.30 christos 811: {
1.14 mycroft 812: struct vop_read_args /* {
813: struct vnode *a_vp;
814: struct uio *a_uio;
815: int a_ioflag;
1.92 elad 816: kauth_cred_t a_cred;
1.30 christos 817: } */ *ap = v;
1.8 cgd 818: int error = EOPNOTSUPP;
1.49 thorpej 819: struct vnode *vp = ap->a_vp;
1.8 cgd 820:
1.49 thorpej 821: switch (VTOFDESC(vp)->fd_type) {
1.8 cgd 822: case Fctty:
1.49 thorpej 823: VOP_UNLOCK(vp, 0);
1.97 ad 824: error = cdev_read(devctty, ap->a_uio, ap->a_ioflag);
1.49 thorpej 825: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.8 cgd 826: break;
827:
828: default:
829: error = EOPNOTSUPP;
830: break;
831: }
1.83 perry 832:
1.8 cgd 833: return (error);
834: }
835:
1.14 mycroft 836: int
1.105 dsl 837: fdesc_write(void *v)
1.30 christos 838: {
1.14 mycroft 839: struct vop_write_args /* {
840: struct vnode *a_vp;
841: struct uio *a_uio;
842: int a_ioflag;
1.92 elad 843: kauth_cred_t a_cred;
1.30 christos 844: } */ *ap = v;
1.8 cgd 845: int error = EOPNOTSUPP;
1.49 thorpej 846: struct vnode *vp = ap->a_vp;
1.8 cgd 847:
1.49 thorpej 848: switch (VTOFDESC(vp)->fd_type) {
1.8 cgd 849: case Fctty:
1.49 thorpej 850: VOP_UNLOCK(vp, 0);
1.97 ad 851: error = cdev_write(devctty, ap->a_uio, ap->a_ioflag);
1.49 thorpej 852: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.8 cgd 853: break;
854:
855: default:
856: error = EOPNOTSUPP;
857: break;
858: }
1.83 perry 859:
1.8 cgd 860: return (error);
861: }
862:
1.14 mycroft 863: int
1.105 dsl 864: fdesc_ioctl(void *v)
1.30 christos 865: {
1.14 mycroft 866: struct vop_ioctl_args /* {
867: struct vnode *a_vp;
1.19 cgd 868: u_long a_command;
1.81 jrf 869: void *a_data;
1.14 mycroft 870: int a_fflag;
1.92 elad 871: kauth_cred_t a_cred;
1.30 christos 872: } */ *ap = v;
1.8 cgd 873: int error = EOPNOTSUPP;
874:
1.14 mycroft 875: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 876: case Fctty:
1.97 ad 877: error = cdev_ioctl(devctty, ap->a_command, ap->a_data,
1.100 pooka 878: ap->a_fflag, curlwp);
1.8 cgd 879: break;
880:
881: default:
882: error = EOPNOTSUPP;
883: break;
1.1 cgd 884: }
1.83 perry 885:
1.8 cgd 886: return (error);
887: }
888:
1.14 mycroft 889: int
1.105 dsl 890: fdesc_poll(void *v)
1.30 christos 891: {
1.35 mycroft 892: struct vop_poll_args /* {
1.14 mycroft 893: struct vnode *a_vp;
1.35 mycroft 894: int a_events;
1.30 christos 895: } */ *ap = v;
1.35 mycroft 896: int revents;
1.8 cgd 897:
1.14 mycroft 898: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 899: case Fctty:
1.100 pooka 900: revents = cdev_poll(devctty, ap->a_events, curlwp);
1.8 cgd 901: break;
1.1 cgd 902:
1.8 cgd 903: default:
1.35 mycroft 904: revents = genfs_poll(v);
1.8 cgd 905: break;
906: }
1.34 mycroft 907:
1.35 mycroft 908: return (revents);
1.71 jdolecek 909: }
910:
911: int
1.105 dsl 912: fdesc_kqfilter(void *v)
1.71 jdolecek 913: {
914: struct vop_kqfilter_args /* {
915: struct vnode *a_vp;
916: struct knote *a_kn;
917: } */ *ap = v;
1.102 ad 918: int error, fd;
919: file_t *fp;
1.71 jdolecek 920:
921: switch (VTOFDESC(ap->a_vp)->fd_type) {
922: case Fctty:
1.97 ad 923: error = cdev_kqfilter(devctty, ap->a_kn);
1.71 jdolecek 924: break;
925:
926: case Fdesc:
927: /* just invoke kqfilter for the underlying descriptor */
1.102 ad 928: fd = VTOFDESC(ap->a_vp)->fd_fd;
929: if ((fp = fd_getfile(fd)) == NULL)
1.71 jdolecek 930: return (1);
931: error = (*fp->f_ops->fo_kqfilter)(fp, ap->a_kn);
1.102 ad 932: fd_putfile(fd);
1.71 jdolecek 933: break;
934:
935: default:
936: return (genfs_kqfilter(v));
937: }
938:
939: return (error);
1.1 cgd 940: }
941:
1.14 mycroft 942: int
1.105 dsl 943: fdesc_inactive(void *v)
1.30 christos 944: {
1.14 mycroft 945: struct vop_inactive_args /* {
946: struct vnode *a_vp;
1.30 christos 947: } */ *ap = v;
1.14 mycroft 948: struct vnode *vp = ap->a_vp;
949:
1.1 cgd 950: /*
951: * Clear out the v_type field to avoid
952: * nasty things happening in vgone().
953: */
1.44 fvdl 954: VOP_UNLOCK(vp, 0);
1.1 cgd 955: vp->v_type = VNON;
956: return (0);
957: }
958:
1.14 mycroft 959: int
1.105 dsl 960: fdesc_reclaim(void *v)
1.30 christos 961: {
1.14 mycroft 962: struct vop_reclaim_args /* {
963: struct vnode *a_vp;
1.30 christos 964: } */ *ap = v;
1.14 mycroft 965: struct vnode *vp = ap->a_vp;
1.17 mycroft 966: struct fdescnode *fd = VTOFDESC(vp);
1.14 mycroft 967:
1.17 mycroft 968: LIST_REMOVE(fd, fd_hash);
1.104 cegger 969: free(vp->v_data, M_TEMP);
1.14 mycroft 970: vp->v_data = 0;
971:
972: return (0);
973: }
974:
975: /*
976: * Return POSIX pathconf information applicable to special devices.
977: */
1.30 christos 978: int
1.105 dsl 979: fdesc_pathconf(void *v)
1.30 christos 980: {
1.14 mycroft 981: struct vop_pathconf_args /* {
982: struct vnode *a_vp;
983: int a_name;
1.18 cgd 984: register_t *a_retval;
1.30 christos 985: } */ *ap = v;
1.8 cgd 986:
1.14 mycroft 987: switch (ap->a_name) {
988: case _PC_LINK_MAX:
989: *ap->a_retval = LINK_MAX;
990: return (0);
991: case _PC_MAX_CANON:
992: *ap->a_retval = MAX_CANON;
993: return (0);
994: case _PC_MAX_INPUT:
995: *ap->a_retval = MAX_INPUT;
996: return (0);
997: case _PC_PIPE_BUF:
998: *ap->a_retval = PIPE_BUF;
999: return (0);
1000: case _PC_CHOWN_RESTRICTED:
1001: *ap->a_retval = 1;
1002: return (0);
1003: case _PC_VDISABLE:
1004: *ap->a_retval = _POSIX_VDISABLE;
1.45 kleink 1005: return (0);
1006: case _PC_SYNC_IO:
1007: *ap->a_retval = 1;
1.14 mycroft 1008: return (0);
1009: default:
1010: return (EINVAL);
1.8 cgd 1011: }
1.14 mycroft 1012: /* NOTREACHED */
1.8 cgd 1013: }
1014:
1.1 cgd 1015: /*
1016: * Print out the contents of a /dev/fd vnode.
1017: */
1018: /* ARGSUSED */
1.14 mycroft 1019: int
1.94 christos 1020: fdesc_print(void *v)
1.1 cgd 1021: {
1.37 christos 1022: printf("tag VT_NON, fdesc vnode\n");
1.14 mycroft 1023: return (0);
1024: }
1025:
1026: int
1.105 dsl 1027: fdesc_link(void *v)
1.30 christos 1028: {
1.29 mycroft 1029: struct vop_link_args /* {
1030: struct vnode *a_dvp;
1.83 perry 1031: struct vnode *a_vp;
1.29 mycroft 1032: struct componentname *a_cnp;
1.30 christos 1033: } */ *ap = v;
1.83 perry 1034:
1.29 mycroft 1035: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1036: vput(ap->a_dvp);
1037: return (EROFS);
1038: }
1039:
1040: int
1.105 dsl 1041: fdesc_symlink(void *v)
1.30 christos 1042: {
1.29 mycroft 1043: struct vop_symlink_args /* {
1044: struct vnode *a_dvp;
1045: struct vnode **a_vpp;
1046: struct componentname *a_cnp;
1047: struct vattr *a_vap;
1048: char *a_target;
1.30 christos 1049: } */ *ap = v;
1.83 perry 1050:
1.29 mycroft 1051: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1052: vput(ap->a_dvp);
1053: return (EROFS);
1.1 cgd 1054: }
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