Annotation of src/sys/miscfs/fdesc/fdesc_vnops.c, Revision 1.119
1.119 ! christos 1: /* $NetBSD: fdesc_vnops.c,v 1.118 2014/02/27 16:51:38 hannken 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>
1.119 ! christos 44: __KERNEL_RCSID(0, "$NetBSD: fdesc_vnops.c,v 1.118 2014/02/27 16:51:38 hannken 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:
1.111 hannken 72: static kmutex_t fdcache_lock;
1.14 mycroft 73:
74: dev_t devctty;
1.8 cgd 75:
76: #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
77: FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
78: #endif
79:
1.16 mycroft 80: #define NFDCACHE 4
1.14 mycroft 81:
1.17 mycroft 82: #define FD_NHASH(ix) \
83: (&fdhashtbl[(ix) & fdhash])
84: LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
85: u_long fdhash;
1.14 mycroft 86:
1.86 xtraeme 87: int fdesc_lookup(void *);
1.74 jdolecek 88: #define fdesc_create genfs_eopnotsupp
89: #define fdesc_mknod genfs_eopnotsupp
1.86 xtraeme 90: int fdesc_open(void *);
1.34 mycroft 91: #define fdesc_close genfs_nullop
92: #define fdesc_access genfs_nullop
1.86 xtraeme 93: int fdesc_getattr(void *);
94: int fdesc_setattr(void *);
95: int fdesc_read(void *);
96: int fdesc_write(void *);
97: int fdesc_ioctl(void *);
98: int fdesc_poll(void *);
99: int fdesc_kqfilter(void *);
1.34 mycroft 100: #define fdesc_mmap genfs_eopnotsupp
1.50 wrstuden 101: #define fdesc_fcntl genfs_fcntl
1.34 mycroft 102: #define fdesc_fsync genfs_nullop
1.40 fvdl 103: #define fdesc_seek genfs_seek
1.74 jdolecek 104: #define fdesc_remove genfs_eopnotsupp
1.86 xtraeme 105: int fdesc_link(void *);
1.74 jdolecek 106: #define fdesc_rename genfs_eopnotsupp
107: #define fdesc_mkdir genfs_eopnotsupp
108: #define fdesc_rmdir genfs_eopnotsupp
1.86 xtraeme 109: int fdesc_symlink(void *);
110: int fdesc_readdir(void *);
111: int fdesc_readlink(void *);
1.34 mycroft 112: #define fdesc_abortop genfs_abortop
1.86 xtraeme 113: int fdesc_inactive(void *);
114: int fdesc_reclaim(void *);
1.48 wrstuden 115: #define fdesc_lock genfs_lock
116: #define fdesc_unlock genfs_unlock
1.34 mycroft 117: #define fdesc_bmap genfs_badop
118: #define fdesc_strategy genfs_badop
1.86 xtraeme 119: int fdesc_print(void *);
120: int fdesc_pathconf(void *);
1.48 wrstuden 121: #define fdesc_islocked genfs_islocked
1.47 kleink 122: #define fdesc_advlock genfs_einval
1.34 mycroft 123: #define fdesc_bwrite genfs_eopnotsupp
1.44 fvdl 124: #define fdesc_revoke genfs_revoke
1.67 chs 125: #define fdesc_putpages genfs_null_putpages
1.30 christos 126:
1.102 ad 127: static int fdesc_attr(int, struct vattr *, kauth_cred_t);
1.30 christos 128:
1.86 xtraeme 129: int (**fdesc_vnodeop_p)(void *);
1.58 jdolecek 130: const struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
1.30 christos 131: { &vop_default_desc, vn_default_error },
1.34 mycroft 132: { &vop_lookup_desc, fdesc_lookup }, /* lookup */
133: { &vop_create_desc, fdesc_create }, /* create */
134: { &vop_mknod_desc, fdesc_mknod }, /* mknod */
135: { &vop_open_desc, fdesc_open }, /* open */
136: { &vop_close_desc, fdesc_close }, /* close */
137: { &vop_access_desc, fdesc_access }, /* access */
138: { &vop_getattr_desc, fdesc_getattr }, /* getattr */
139: { &vop_setattr_desc, fdesc_setattr }, /* setattr */
140: { &vop_read_desc, fdesc_read }, /* read */
141: { &vop_write_desc, fdesc_write }, /* write */
142: { &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */
1.50 wrstuden 143: { &vop_fcntl_desc, fdesc_fcntl }, /* fcntl */
1.35 mycroft 144: { &vop_poll_desc, fdesc_poll }, /* poll */
1.71 jdolecek 145: { &vop_kqfilter_desc, fdesc_kqfilter }, /* kqfilter */
1.44 fvdl 146: { &vop_revoke_desc, fdesc_revoke }, /* revoke */
1.34 mycroft 147: { &vop_mmap_desc, fdesc_mmap }, /* mmap */
148: { &vop_fsync_desc, fdesc_fsync }, /* fsync */
149: { &vop_seek_desc, fdesc_seek }, /* seek */
150: { &vop_remove_desc, fdesc_remove }, /* remove */
151: { &vop_link_desc, fdesc_link }, /* link */
152: { &vop_rename_desc, fdesc_rename }, /* rename */
153: { &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */
154: { &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */
155: { &vop_symlink_desc, fdesc_symlink }, /* symlink */
156: { &vop_readdir_desc, fdesc_readdir }, /* readdir */
157: { &vop_readlink_desc, fdesc_readlink }, /* readlink */
158: { &vop_abortop_desc, fdesc_abortop }, /* abortop */
159: { &vop_inactive_desc, fdesc_inactive }, /* inactive */
160: { &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */
161: { &vop_lock_desc, fdesc_lock }, /* lock */
162: { &vop_unlock_desc, fdesc_unlock }, /* unlock */
163: { &vop_bmap_desc, fdesc_bmap }, /* bmap */
164: { &vop_strategy_desc, fdesc_strategy }, /* strategy */
165: { &vop_print_desc, fdesc_print }, /* print */
166: { &vop_islocked_desc, fdesc_islocked }, /* islocked */
167: { &vop_pathconf_desc, fdesc_pathconf }, /* pathconf */
168: { &vop_advlock_desc, fdesc_advlock }, /* advlock */
169: { &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */
1.67 chs 170: { &vop_putpages_desc, fdesc_putpages }, /* putpages */
171: { NULL, NULL }
1.30 christos 172: };
173:
1.58 jdolecek 174: const struct vnodeopv_desc fdesc_vnodeop_opv_desc =
1.30 christos 175: { &fdesc_vnodeop_p, fdesc_vnodeop_entries };
176:
1.14 mycroft 177: /*
178: * Initialise cache headers
179: */
1.30 christos 180: void
1.106 cegger 181: fdesc_init(void)
1.14 mycroft 182: {
1.32 mrg 183: int cttymajor;
1.14 mycroft 184:
1.32 mrg 185: /* locate the major number */
1.108 pooka 186: cttymajor = devsw_name2chr("ctty", NULL, 0);
1.32 mrg 187: devctty = makedev(cttymajor, 0);
1.111 hannken 188: mutex_init(&fdcache_lock, MUTEX_DEFAULT, IPL_NONE);
1.103 ad 189: fdhashtbl = hashinit(NFDCACHE, HASH_LIST, true, &fdhash);
1.54 jdolecek 190: }
191:
192: /*
193: * Free hash table.
194: */
195: void
1.106 cegger 196: fdesc_done(void)
1.54 jdolecek 197: {
1.103 ad 198: hashdone(fdhashtbl, HASH_LIST, fdhash);
1.111 hannken 199: mutex_destroy(&fdcache_lock);
1.14 mycroft 200: }
201:
1.48 wrstuden 202: /*
203: * Return a locked vnode of the correct type.
204: */
1.14 mycroft 205: int
1.105 dsl 206: fdesc_allocvp(fdntype ftype, int ix, struct mount *mp, struct vnode **vpp)
1.8 cgd 207: {
1.17 mycroft 208: struct fdhashhead *fc;
1.14 mycroft 209: struct fdescnode *fd;
1.8 cgd 210: int error = 0;
211:
1.17 mycroft 212: fc = FD_NHASH(ix);
1.8 cgd 213: loop:
1.111 hannken 214: mutex_enter(&fdcache_lock);
215: LIST_FOREACH(fd, fc, fd_hash) {
1.14 mycroft 216: if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
1.113 rmind 217: mutex_enter(fd->fd_vnode->v_interlock);
1.111 hannken 218: mutex_exit(&fdcache_lock);
1.112 hannken 219: if (vget(fd->fd_vnode, LK_EXCLUSIVE))
1.8 cgd 220: goto loop;
1.14 mycroft 221: *vpp = fd->fd_vnode;
1.111 hannken 222: return 0;
1.8 cgd 223: }
224: }
1.111 hannken 225: mutex_exit(&fdcache_lock);
226:
1.113 rmind 227: error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, NULL, vpp);
1.111 hannken 228: if (error)
229: return error;
1.8 cgd 230:
1.111 hannken 231: mutex_enter(&fdcache_lock);
232: LIST_FOREACH(fd, fc, fd_hash) {
233: if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
234: /*
235: * Another thread beat us, push back freshly
236: * allocated vnode and retry.
237: */
238: mutex_exit(&fdcache_lock);
239: ungetnewvnode(*vpp);
240: goto loop;
241: }
1.8 cgd 242: }
1.1 cgd 243:
1.104 cegger 244: fd = malloc(sizeof(struct fdescnode), M_TEMP, M_WAITOK);
1.14 mycroft 245: (*vpp)->v_data = fd;
246: fd->fd_vnode = *vpp;
247: fd->fd_type = ftype;
248: fd->fd_fd = -1;
249: fd->fd_link = 0;
250: fd->fd_ix = ix;
1.98 pooka 251: uvm_vnp_setsize(*vpp, 0);
1.118 hannken 252: error = VOP_LOCK(*vpp, LK_EXCLUSIVE);
253: KASSERT(error == 0);
1.17 mycroft 254: LIST_INSERT_HEAD(fc, fd, fd_hash);
1.111 hannken 255: mutex_exit(&fdcache_lock);
1.8 cgd 256:
1.111 hannken 257: return 0;
1.8 cgd 258: }
1.1 cgd 259:
260: /*
261: * vp is the current namei directory
262: * ndp is the name to locate in that directory...
263: */
1.14 mycroft 264: int
1.105 dsl 265: fdesc_lookup(void *v)
1.30 christos 266: {
1.117 hannken 267: struct vop_lookup_v2_args /* {
1.14 mycroft 268: struct vnode * a_dvp;
269: struct vnode ** a_vpp;
270: struct componentname * a_cnp;
1.30 christos 271: } */ *ap = v;
1.14 mycroft 272: struct vnode **vpp = ap->a_vpp;
273: struct vnode *dvp = ap->a_dvp;
1.44 fvdl 274: struct componentname *cnp = ap->a_cnp;
1.101 pooka 275: struct lwp *l = curlwp;
1.44 fvdl 276: const char *pname = cnp->cn_nameptr;
1.89 christos 277: struct proc *p = l->l_proc;
1.30 christos 278: unsigned fd = 0;
1.1 cgd 279: int error;
280: struct vnode *fvp;
1.84 christos 281: const char *ln;
1.107 ad 282: fdtab_t *dt;
283:
284: dt = curlwp->l_fd->fd_dt;
1.1 cgd 285:
1.44 fvdl 286: if (cnp->cn_namelen == 1 && *pname == '.') {
1.14 mycroft 287: *vpp = dvp;
1.109 pooka 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) {
1.110 hannken 362: VOP_UNLOCK(dvp);
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';
1.107 ad 373: if (fd >= dt->dt_nfiles)
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:
1.107 ad 382: if (fd >= dt->dt_nfiles || dt->dt_ff[fd] == NULL ||
383: dt->dt_ff[fd]->ff_file == NULL) {
1.8 cgd 384: error = EBADF;
385: goto bad;
386: }
1.1 cgd 387:
1.8 cgd 388: error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
389: if (error)
390: goto bad;
391: VTOFDESC(fvp)->fd_fd = fd;
1.14 mycroft 392: *vpp = fvp;
1.48 wrstuden 393: goto good;
1.8 cgd 394: }
1.1 cgd 395:
1.95 chs 396: bad:
1.14 mycroft 397: *vpp = NULL;
1.1 cgd 398: return (error);
1.48 wrstuden 399:
1.95 chs 400: good:
1.117 hannken 401: VOP_UNLOCK(*vpp);
1.48 wrstuden 402: return (0);
1.1 cgd 403: }
404:
1.14 mycroft 405: int
1.105 dsl 406: fdesc_open(void *v)
1.30 christos 407: {
1.14 mycroft 408: struct vop_open_args /* {
409: struct vnode *a_vp;
410: int a_mode;
1.92 elad 411: kauth_cred_t a_cred;
1.30 christos 412: } */ *ap = v;
1.14 mycroft 413: struct vnode *vp = ap->a_vp;
1.8 cgd 414:
415: switch (VTOFDESC(vp)->fd_type) {
416: case Fdesc:
1.23 mycroft 417: /*
1.79 jdolecek 418: * XXX Kludge: set dupfd to contain the value of the
1.83 perry 419: * the file descriptor being sought for duplication. The error
1.23 mycroft 420: * return ensures that the vnode for this device will be
421: * released by vn_open. Open will detect this special error and
422: * take the actions in dupfdopen. Other callers of vn_open or
423: * VOP_OPEN will simply report the error.
424: */
1.79 jdolecek 425: curlwp->l_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
1.82 christos 426: return EDUPFD;
1.1 cgd 427:
1.8 cgd 428: case Fctty:
1.100 pooka 429: return cdev_open(devctty, ap->a_mode, 0, curlwp);
1.30 christos 430: case Froot:
431: case Fdevfd:
432: case Flink:
433: break;
1.8 cgd 434: }
1.1 cgd 435:
1.21 mycroft 436: return (0);
1.1 cgd 437: }
438:
439: static int
1.105 dsl 440: fdesc_attr(int fd, struct vattr *vap, kauth_cred_t cred)
1.1 cgd 441: {
1.102 ad 442: file_t *fp;
1.8 cgd 443: struct stat stb;
1.1 cgd 444: int error;
445:
1.102 ad 446: if ((fp = fd_getfile(fd)) == NULL)
1.1 cgd 447: return (EBADF);
448:
449: switch (fp->f_type) {
450: case DTYPE_VNODE:
1.114 hannken 451: vn_lock((struct vnode *) fp->f_data, LK_SHARED | LK_RETRY);
1.100 pooka 452: error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred);
1.114 hannken 453: VOP_UNLOCK((struct vnode *) fp->f_data);
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:
1.109 pooka 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;
1.53 sommerfe 653: off_t i;
1.87 christos 654: int j;
1.1 cgd 655: int error;
1.44 fvdl 656: off_t *cookies = NULL;
1.87 christos 657: int ncookies;
1.107 ad 658: fdtab_t *dt;
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:
1.107 ad 671: dt = curlwp->l_fd->fd_dt;
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 ((ft->ft_fileno - FD_STDIN) >=
1.107 ad 713: dt->dt_nfiles)
1.87 christos 714: continue;
1.107 ad 715: if (dt->dt_ff[ft->ft_fileno - FD_STDIN]
716: == NULL || dt->dt_ff[ft->ft_fileno -
1.102 ad 717: FD_STDIN]->ff_file == NULL)
1.8 cgd 718: continue;
719: break;
720: }
1.25 mycroft 721:
722: d.d_fileno = ft->ft_fileno;
723: d.d_namlen = ft->ft_namlen;
1.87 christos 724: (void)memcpy(d.d_name, ft->ft_name, ft->ft_namlen + 1);
1.25 mycroft 725: d.d_type = ft->ft_type;
726:
1.81 jrf 727: if ((error = uiomove(&d, UIO_MX, uio)) != 0)
1.8 cgd 728: break;
1.44 fvdl 729: if (cookies)
1.26 mycroft 730: *cookies++ = i + 1;
1.3 cgd 731: }
1.25 mycroft 732: } else {
1.102 ad 733: membar_consumer();
1.44 fvdl 734: if (ap->a_ncookies) {
1.107 ad 735: ncookies = min(ncookies, dt->dt_nfiles + 2);
1.56 thorpej 736: cookies = malloc(ncookies * sizeof(off_t),
737: M_TEMP, M_WAITOK);
1.44 fvdl 738: *ap->a_cookies = cookies;
739: *ap->a_ncookies = ncookies;
740: }
1.107 ad 741: for (; i - 2 < dt->dt_nfiles && uio->uio_resid >= UIO_MX; i++) {
1.25 mycroft 742: switch (i) {
743: case 0:
744: case 1:
745: d.d_fileno = FD_ROOT; /* XXX */
746: d.d_namlen = i + 1;
1.87 christos 747: (void)memcpy(d.d_name, "..", d.d_namlen);
1.25 mycroft 748: d.d_name[i + 1] = '\0';
749: d.d_type = DT_DIR;
750: break;
1.83 perry 751:
1.25 mycroft 752: default:
1.87 christos 753: j = (int)i - 2;
1.107 ad 754: if (dt->dt_ff[j] == NULL ||
755: dt->dt_ff[j]->ff_file == NULL)
1.25 mycroft 756: continue;
1.87 christos 757: d.d_fileno = j + FD_STDIN;
1.119 ! christos 758: d.d_namlen = snprintf(d.d_name,
! 759: sizeof(d.d_name), "%d", j);
1.25 mycroft 760: d.d_type = DT_UNKNOWN;
761: break;
762: }
1.8 cgd 763:
1.81 jrf 764: if ((error = uiomove(&d, UIO_MX, uio)) != 0)
1.1 cgd 765: break;
1.44 fvdl 766: if (cookies)
1.26 mycroft 767: *cookies++ = i + 1;
1.1 cgd 768: }
1.8 cgd 769: }
770:
1.44 fvdl 771: if (ap->a_ncookies && error) {
1.56 thorpej 772: free(*ap->a_cookies, M_TEMP);
1.44 fvdl 773: *ap->a_ncookies = 0;
774: *ap->a_cookies = NULL;
775: }
776:
1.26 mycroft 777: uio->uio_offset = i;
1.87 christos 778: return error;
1.8 cgd 779: }
780:
1.14 mycroft 781: int
1.105 dsl 782: fdesc_readlink(void *v)
1.30 christos 783: {
1.14 mycroft 784: struct vop_readlink_args /* {
785: struct vnode *a_vp;
786: struct uio *a_uio;
1.92 elad 787: kauth_cred_t a_cred;
1.30 christos 788: } */ *ap = v;
1.14 mycroft 789: struct vnode *vp = ap->a_vp;
1.8 cgd 790: int error;
791:
1.14 mycroft 792: if (vp->v_type != VLNK)
793: return (EPERM);
794:
1.8 cgd 795: if (VTOFDESC(vp)->fd_type == Flink) {
796: char *ln = VTOFDESC(vp)->fd_link;
1.14 mycroft 797: error = uiomove(ln, strlen(ln), ap->a_uio);
1.8 cgd 798: } else {
799: error = EOPNOTSUPP;
800: }
801:
802: return (error);
803: }
804:
1.14 mycroft 805: int
1.105 dsl 806: fdesc_read(void *v)
1.30 christos 807: {
1.14 mycroft 808: struct vop_read_args /* {
809: struct vnode *a_vp;
810: struct uio *a_uio;
811: int a_ioflag;
1.92 elad 812: kauth_cred_t a_cred;
1.30 christos 813: } */ *ap = v;
1.8 cgd 814: int error = EOPNOTSUPP;
1.49 thorpej 815: struct vnode *vp = ap->a_vp;
1.8 cgd 816:
1.49 thorpej 817: switch (VTOFDESC(vp)->fd_type) {
1.8 cgd 818: case Fctty:
1.110 hannken 819: VOP_UNLOCK(vp);
1.97 ad 820: error = cdev_read(devctty, ap->a_uio, ap->a_ioflag);
1.49 thorpej 821: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.8 cgd 822: break;
823:
824: default:
825: error = EOPNOTSUPP;
826: break;
827: }
1.83 perry 828:
1.8 cgd 829: return (error);
830: }
831:
1.14 mycroft 832: int
1.105 dsl 833: fdesc_write(void *v)
1.30 christos 834: {
1.14 mycroft 835: struct vop_write_args /* {
836: struct vnode *a_vp;
837: struct uio *a_uio;
838: int a_ioflag;
1.92 elad 839: kauth_cred_t a_cred;
1.30 christos 840: } */ *ap = v;
1.8 cgd 841: int error = EOPNOTSUPP;
1.49 thorpej 842: struct vnode *vp = ap->a_vp;
1.8 cgd 843:
1.49 thorpej 844: switch (VTOFDESC(vp)->fd_type) {
1.8 cgd 845: case Fctty:
1.110 hannken 846: VOP_UNLOCK(vp);
1.97 ad 847: error = cdev_write(devctty, ap->a_uio, ap->a_ioflag);
1.49 thorpej 848: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.8 cgd 849: break;
850:
851: default:
852: error = EOPNOTSUPP;
853: break;
854: }
1.83 perry 855:
1.8 cgd 856: return (error);
857: }
858:
1.14 mycroft 859: int
1.105 dsl 860: fdesc_ioctl(void *v)
1.30 christos 861: {
1.14 mycroft 862: struct vop_ioctl_args /* {
863: struct vnode *a_vp;
1.19 cgd 864: u_long a_command;
1.81 jrf 865: void *a_data;
1.14 mycroft 866: int a_fflag;
1.92 elad 867: kauth_cred_t a_cred;
1.30 christos 868: } */ *ap = v;
1.8 cgd 869: int error = EOPNOTSUPP;
870:
1.14 mycroft 871: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 872: case Fctty:
1.97 ad 873: error = cdev_ioctl(devctty, ap->a_command, ap->a_data,
1.100 pooka 874: ap->a_fflag, curlwp);
1.8 cgd 875: break;
876:
877: default:
878: error = EOPNOTSUPP;
879: break;
1.1 cgd 880: }
1.83 perry 881:
1.8 cgd 882: return (error);
883: }
884:
1.14 mycroft 885: int
1.105 dsl 886: fdesc_poll(void *v)
1.30 christos 887: {
1.35 mycroft 888: struct vop_poll_args /* {
1.14 mycroft 889: struct vnode *a_vp;
1.35 mycroft 890: int a_events;
1.30 christos 891: } */ *ap = v;
1.35 mycroft 892: int revents;
1.8 cgd 893:
1.14 mycroft 894: switch (VTOFDESC(ap->a_vp)->fd_type) {
1.8 cgd 895: case Fctty:
1.100 pooka 896: revents = cdev_poll(devctty, ap->a_events, curlwp);
1.8 cgd 897: break;
1.1 cgd 898:
1.8 cgd 899: default:
1.35 mycroft 900: revents = genfs_poll(v);
1.8 cgd 901: break;
902: }
1.34 mycroft 903:
1.35 mycroft 904: return (revents);
1.71 jdolecek 905: }
906:
907: int
1.105 dsl 908: fdesc_kqfilter(void *v)
1.71 jdolecek 909: {
910: struct vop_kqfilter_args /* {
911: struct vnode *a_vp;
912: struct knote *a_kn;
913: } */ *ap = v;
1.102 ad 914: int error, fd;
915: file_t *fp;
1.71 jdolecek 916:
917: switch (VTOFDESC(ap->a_vp)->fd_type) {
918: case Fctty:
1.97 ad 919: error = cdev_kqfilter(devctty, ap->a_kn);
1.71 jdolecek 920: break;
921:
922: case Fdesc:
923: /* just invoke kqfilter for the underlying descriptor */
1.102 ad 924: fd = VTOFDESC(ap->a_vp)->fd_fd;
925: if ((fp = fd_getfile(fd)) == NULL)
1.71 jdolecek 926: return (1);
927: error = (*fp->f_ops->fo_kqfilter)(fp, ap->a_kn);
1.102 ad 928: fd_putfile(fd);
1.71 jdolecek 929: break;
930:
931: default:
932: return (genfs_kqfilter(v));
933: }
934:
935: return (error);
1.1 cgd 936: }
937:
1.14 mycroft 938: int
1.105 dsl 939: fdesc_inactive(void *v)
1.30 christos 940: {
1.14 mycroft 941: struct vop_inactive_args /* {
942: struct vnode *a_vp;
1.30 christos 943: } */ *ap = v;
1.14 mycroft 944: struct vnode *vp = ap->a_vp;
945:
1.1 cgd 946: /*
947: * Clear out the v_type field to avoid
948: * nasty things happening in vgone().
949: */
1.110 hannken 950: VOP_UNLOCK(vp);
1.1 cgd 951: vp->v_type = VNON;
952: return (0);
953: }
954:
1.14 mycroft 955: int
1.105 dsl 956: fdesc_reclaim(void *v)
1.30 christos 957: {
1.14 mycroft 958: struct vop_reclaim_args /* {
959: struct vnode *a_vp;
1.30 christos 960: } */ *ap = v;
1.14 mycroft 961: struct vnode *vp = ap->a_vp;
1.17 mycroft 962: struct fdescnode *fd = VTOFDESC(vp);
1.14 mycroft 963:
1.111 hannken 964: mutex_enter(&fdcache_lock);
1.17 mycroft 965: LIST_REMOVE(fd, fd_hash);
1.104 cegger 966: free(vp->v_data, M_TEMP);
1.14 mycroft 967: vp->v_data = 0;
1.111 hannken 968: mutex_exit(&fdcache_lock);
1.14 mycroft 969:
970: return (0);
971: }
972:
973: /*
974: * Return POSIX pathconf information applicable to special devices.
975: */
1.30 christos 976: int
1.105 dsl 977: fdesc_pathconf(void *v)
1.30 christos 978: {
1.14 mycroft 979: struct vop_pathconf_args /* {
980: struct vnode *a_vp;
981: int a_name;
1.18 cgd 982: register_t *a_retval;
1.30 christos 983: } */ *ap = v;
1.8 cgd 984:
1.14 mycroft 985: switch (ap->a_name) {
986: case _PC_LINK_MAX:
987: *ap->a_retval = LINK_MAX;
988: return (0);
989: case _PC_MAX_CANON:
990: *ap->a_retval = MAX_CANON;
991: return (0);
992: case _PC_MAX_INPUT:
993: *ap->a_retval = MAX_INPUT;
994: return (0);
995: case _PC_PIPE_BUF:
996: *ap->a_retval = PIPE_BUF;
997: return (0);
998: case _PC_CHOWN_RESTRICTED:
999: *ap->a_retval = 1;
1000: return (0);
1001: case _PC_VDISABLE:
1002: *ap->a_retval = _POSIX_VDISABLE;
1.45 kleink 1003: return (0);
1004: case _PC_SYNC_IO:
1005: *ap->a_retval = 1;
1.14 mycroft 1006: return (0);
1007: default:
1008: return (EINVAL);
1.8 cgd 1009: }
1.14 mycroft 1010: /* NOTREACHED */
1.8 cgd 1011: }
1012:
1.1 cgd 1013: /*
1014: * Print out the contents of a /dev/fd vnode.
1015: */
1016: /* ARGSUSED */
1.14 mycroft 1017: int
1.94 christos 1018: fdesc_print(void *v)
1.1 cgd 1019: {
1.37 christos 1020: printf("tag VT_NON, fdesc vnode\n");
1.14 mycroft 1021: return (0);
1022: }
1023:
1024: int
1.105 dsl 1025: fdesc_link(void *v)
1.30 christos 1026: {
1.29 mycroft 1027: struct vop_link_args /* {
1028: struct vnode *a_dvp;
1.83 perry 1029: struct vnode *a_vp;
1.29 mycroft 1030: struct componentname *a_cnp;
1.30 christos 1031: } */ *ap = v;
1.83 perry 1032:
1.29 mycroft 1033: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1034: vput(ap->a_dvp);
1035: return (EROFS);
1036: }
1037:
1038: int
1.105 dsl 1039: fdesc_symlink(void *v)
1.30 christos 1040: {
1.116 hannken 1041: struct vop_symlink_v3_args /* {
1.29 mycroft 1042: struct vnode *a_dvp;
1043: struct vnode **a_vpp;
1044: struct componentname *a_cnp;
1045: struct vattr *a_vap;
1046: char *a_target;
1.30 christos 1047: } */ *ap = v;
1.83 perry 1048:
1.29 mycroft 1049: VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
1050: return (EROFS);
1.1 cgd 1051: }
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