1 /* $NetBSD: vfs_syscalls.c,v 1.217.2.13 2007/06/26 17:00:47 ghen Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95
37 */
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.217.2.13 2007/06/26 17:00:47 ghen Exp $");
41
42 #include "opt_compat_netbsd.h"
43 #include "opt_compat_43.h"
44 #include "opt_ktrace.h"
45 #include "opt_verified_exec.h"
46 #include "fss.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/namei.h>
51 #include <sys/filedesc.h>
52 #include <sys/kernel.h>
53 #include <sys/file.h>
54 #include <sys/stat.h>
55 #include <sys/vnode.h>
56 #include <sys/mount.h>
57 #include <sys/proc.h>
58 #include <sys/uio.h>
59 #include <sys/malloc.h>
60 #include <sys/dirent.h>
61 #include <sys/extattr.h>
62 #include <sys/sysctl.h>
63 #include <sys/sa.h>
64 #include <sys/syscallargs.h>
65 #ifdef KTRACE
66 #include <sys/ktrace.h>
67 #endif
68 #ifdef VERIFIED_EXEC
69 #include <sys/verified_exec.h>
70 #endif /* VERIFIED_EXEC */
71
72 #include <miscfs/genfs/genfs.h>
73 #include <miscfs/syncfs/syncfs.h>
74
75 #if NFSS > 0
76 #include <dev/fssvar.h>
77 #endif
78
79 MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct");
80
81 static int change_dir(struct nameidata *, struct proc *);
82 static int change_flags(struct vnode *, u_long, struct proc *);
83 static int change_mode(struct vnode *, int, struct proc *p);
84 static int change_owner(struct vnode *, uid_t, gid_t, struct proc *, int);
85 static int change_utimes(struct vnode *vp, const struct timeval *,
86 struct proc *p);
87 static int rename_files(const char *, const char *, struct proc *, int);
88
89 void checkdirs(struct vnode *);
90
91 int dovfsusermount = 0;
92
93 /*
94 * Virtual File System System Calls
95 */
96
97 /*
98 * Mount a file system.
99 */
100
101 #if defined(COMPAT_09) || defined(COMPAT_43)
102 /*
103 * This table is used to maintain compatibility with 4.3BSD
104 * and NetBSD 0.9 mount syscalls. Note, the order is important!
105 *
106 * Do not modify this table. It should only contain filesystems
107 * supported by NetBSD 0.9 and 4.3BSD.
108 */
109 const char * const mountcompatnames[] = {
110 NULL, /* 0 = MOUNT_NONE */
111 MOUNT_FFS, /* 1 = MOUNT_UFS */
112 MOUNT_NFS, /* 2 */
113 MOUNT_MFS, /* 3 */
114 MOUNT_MSDOS, /* 4 */
115 MOUNT_CD9660, /* 5 = MOUNT_ISOFS */
116 MOUNT_FDESC, /* 6 */
117 MOUNT_KERNFS, /* 7 */
118 NULL, /* 8 = MOUNT_DEVFS */
119 MOUNT_AFS, /* 9 */
120 };
121 const int nmountcompatnames = sizeof(mountcompatnames) /
122 sizeof(mountcompatnames[0]);
123 #endif /* COMPAT_09 || COMPAT_43 */
124
125 /* ARGSUSED */
126 int
127 sys_mount(l, v, retval)
128 struct lwp *l;
129 void *v;
130 register_t *retval;
131 {
132 struct sys_mount_args /* {
133 syscallarg(const char *) type;
134 syscallarg(const char *) path;
135 syscallarg(int) flags;
136 syscallarg(void *) data;
137 } */ *uap = v;
138 struct proc *p = l->l_proc;
139 struct vnode *vp;
140 struct mount *mp;
141 int error, flag = 0;
142 char fstypename[MFSNAMELEN];
143 struct vattr va;
144 struct nameidata nd;
145 struct vfsops *vfs;
146
147 /*
148 * if MNT_GETARGS is specified, it should be only flag.
149 */
150
151 if ((SCARG(uap, flags) & MNT_GETARGS) != 0 &&
152 (SCARG(uap, flags) & ~MNT_GETARGS) != 0) {
153 return EINVAL;
154 }
155
156 if (dovfsusermount == 0 && (SCARG(uap, flags) & MNT_GETARGS) == 0 &&
157 (error = suser(p->p_ucred, &p->p_acflag)))
158 return (error);
159 /*
160 * Get vnode to be covered
161 */
162 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE,
163 SCARG(uap, path), p);
164 if ((error = namei(&nd)) != 0)
165 return (error);
166 vp = nd.ni_vp;
167 /*
168 * A lookup in VFS_MOUNT might result in an attempt to
169 * lock this vnode again, so make the lock recursive.
170 */
171 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE);
172 if (SCARG(uap, flags) & (MNT_UPDATE | MNT_GETARGS)) {
173 if ((vp->v_flag & VROOT) == 0) {
174 vput(vp);
175 return (EINVAL);
176 }
177 mp = vp->v_mount;
178 flag = mp->mnt_flag;
179 vfs = mp->mnt_op;
180 /*
181 * We only allow the filesystem to be reloaded if it
182 * is currently mounted read-only.
183 */
184 if ((SCARG(uap, flags) & MNT_RELOAD) &&
185 ((mp->mnt_flag & MNT_RDONLY) == 0)) {
186 vput(vp);
187 return (EOPNOTSUPP); /* Needs translation */
188 }
189 /*
190 * In "highly secure" mode, don't let the caller do anything
191 * but downgrade a filesystem from read-write to read-only.
192 * (see also below; MNT_UPDATE or MNT_GETARGS is required.)
193 */
194 if (securelevel >= 2 &&
195 SCARG(uap, flags) != MNT_GETARGS &&
196 SCARG(uap, flags) !=
197 (mp->mnt_flag | MNT_RDONLY |
198 MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) {
199 vput(vp);
200 return (EPERM);
201 }
202 mp->mnt_flag |= SCARG(uap, flags) &
203 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS);
204 /*
205 * Only root, or the user that did the original mount is
206 * permitted to update it.
207 */
208 if ((mp->mnt_flag & MNT_GETARGS) == 0 &&
209 mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
210 (error = suser(p->p_ucred, &p->p_acflag)) != 0) {
211 vput(vp);
212 return (error);
213 }
214 /*
215 * Do not allow NFS export by non-root users. For non-root
216 * users, silently enforce MNT_NOSUID and MNT_NODEV, and
217 * MNT_NOEXEC if mount point is already MNT_NOEXEC.
218 */
219 if (p->p_ucred->cr_uid != 0) {
220 if (SCARG(uap, flags) & MNT_EXPORTED) {
221 vput(vp);
222 return (EPERM);
223 }
224 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
225 if (flag & MNT_NOEXEC)
226 SCARG(uap, flags) |= MNT_NOEXEC;
227 }
228 if (vfs_busy(mp, LK_NOWAIT, 0)) {
229 vput(vp);
230 return (EPERM);
231 }
232 goto update;
233 } else {
234 if (securelevel >= 2) {
235 vput(vp);
236 return (EPERM);
237 }
238 }
239 /*
240 * If the user is not root, ensure that they own the directory
241 * onto which we are attempting to mount.
242 */
243 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0 ||
244 (va.va_uid != p->p_ucred->cr_uid &&
245 (error = suser(p->p_ucred, &p->p_acflag)) != 0)) {
246 vput(vp);
247 return (error);
248 }
249 /*
250 * Do not allow NFS export by non-root users. For non-root users,
251 * silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the
252 * mount point is already MNT_NOEXEC.
253 */
254 if (p->p_ucred->cr_uid != 0) {
255 if (SCARG(uap, flags) & MNT_EXPORTED) {
256 vput(vp);
257 return (EPERM);
258 }
259 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
260 if (vp->v_mount->mnt_flag & MNT_NOEXEC)
261 SCARG(uap, flags) |= MNT_NOEXEC;
262 }
263 if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) {
264 vput(vp);
265 return (error);
266 }
267 if (vp->v_type != VDIR) {
268 vput(vp);
269 return (ENOTDIR);
270 }
271 error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL);
272 if (error) {
273 #if defined(COMPAT_09) || defined(COMPAT_43)
274 /*
275 * Historically filesystem types were identified by number.
276 * If we get an integer for the filesystem type instead of a
277 * string, we check to see if it matches one of the historic
278 * filesystem types.
279 */
280 u_long fsindex = (u_long)SCARG(uap, type);
281 if (fsindex >= nmountcompatnames ||
282 mountcompatnames[fsindex] == NULL) {
283 vput(vp);
284 return (ENODEV);
285 }
286 strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN);
287 #else
288 vput(vp);
289 return (error);
290 #endif
291 }
292 #ifdef COMPAT_10
293 /* Accept `ufs' as an alias for `ffs'. */
294 if (!strncmp(fstypename, "ufs", MFSNAMELEN))
295 strncpy(fstypename, "ffs", MFSNAMELEN);
296 #endif
297 if ((vfs = vfs_getopsbyname(fstypename)) == NULL) {
298 vput(vp);
299 return (ENODEV);
300 }
301 if (vp->v_mountedhere != NULL) {
302 vput(vp);
303 return (EBUSY);
304 }
305
306 /*
307 * Allocate and initialize the file system.
308 */
309 mp = (struct mount *)malloc((u_long)sizeof(struct mount),
310 M_MOUNT, M_WAITOK);
311 memset((char *)mp, 0, (u_long)sizeof(struct mount));
312 lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);
313 simple_lock_init(&mp->mnt_slock);
314 (void)vfs_busy(mp, LK_NOWAIT, 0);
315 mp->mnt_op = vfs;
316 vfs->vfs_refcount++;
317 mp->mnt_vnodecovered = vp;
318 mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
319 mp->mnt_unmounter = NULL;
320 mp->mnt_leaf = mp;
321
322 /*
323 * The underlying file system may refuse the mount for
324 * various reasons. Allow the user to force it to happen.
325 */
326 mp->mnt_flag |= SCARG(uap, flags) & MNT_FORCE;
327 update:
328 if ((SCARG(uap, flags) & MNT_GETARGS) == 0) {
329 /*
330 * Set the mount level flags.
331 */
332 if (SCARG(uap, flags) & MNT_RDONLY)
333 mp->mnt_flag |= MNT_RDONLY;
334 else if (mp->mnt_flag & MNT_RDONLY)
335 mp->mnt_iflag |= IMNT_WANTRDWR;
336 mp->mnt_flag &=
337 ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
338 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP |
339 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP);
340 mp->mnt_flag |= SCARG(uap, flags) &
341 (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
342 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP |
343 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP |
344 MNT_IGNORE);
345 }
346 /*
347 * Mount the filesystem.
348 */
349 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
350 if (mp->mnt_flag & (MNT_UPDATE | MNT_GETARGS)) {
351 if (mp->mnt_iflag & IMNT_WANTRDWR)
352 mp->mnt_flag &= ~MNT_RDONLY;
353 if (error)
354 mp->mnt_flag = flag;
355 mp->mnt_flag &=~
356 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS);
357 mp->mnt_iflag &=~ IMNT_WANTRDWR;
358 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) {
359 if (mp->mnt_syncer == NULL)
360 error = vfs_allocate_syncvnode(mp);
361 } else {
362 if (mp->mnt_syncer != NULL)
363 vfs_deallocate_syncvnode(mp);
364 }
365 vfs_unbusy(mp);
366 VOP_UNLOCK(vp, 0);
367 vrele(vp);
368 return (error);
369 }
370 /*
371 * Put the new filesystem on the mount list after root.
372 */
373 cache_purge(vp);
374 if (!error) {
375 mp->mnt_flag &=~
376 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS);
377 mp->mnt_iflag &=~ IMNT_WANTRDWR;
378 vp->v_mountedhere = mp;
379 simple_lock(&mountlist_slock);
380 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
381 simple_unlock(&mountlist_slock);
382 checkdirs(vp);
383 VOP_UNLOCK(vp, 0);
384 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0)
385 error = vfs_allocate_syncvnode(mp);
386 vfs_unbusy(mp);
387 (void) VFS_STATVFS(mp, &mp->mnt_stat, p);
388 if ((error = VFS_START(mp, 0, p)))
389 vrele(vp);
390 } else {
391 vp->v_mountedhere = (struct mount *)0;
392 vfs->vfs_refcount--;
393 vfs_unbusy(mp);
394 free(mp, M_MOUNT);
395 vput(vp);
396 }
397 return (error);
398 }
399
400 /*
401 * Scan all active processes to see if any of them have a current
402 * or root directory onto which the new filesystem has just been
403 * mounted. If so, replace them with the new mount point.
404 */
405 void
406 checkdirs(olddp)
407 struct vnode *olddp;
408 {
409 struct cwdinfo *cwdi;
410 struct vnode *newdp;
411 struct proc *p;
412
413 if (olddp->v_usecount == 1)
414 return;
415 if (VFS_ROOT(olddp->v_mountedhere, &newdp))
416 panic("mount: lost mount");
417 proclist_lock_read();
418 PROCLIST_FOREACH(p, &allproc) {
419 cwdi = p->p_cwdi;
420 if (!cwdi)
421 continue;
422 if (cwdi->cwdi_cdir == olddp) {
423 vrele(cwdi->cwdi_cdir);
424 VREF(newdp);
425 cwdi->cwdi_cdir = newdp;
426 }
427 if (cwdi->cwdi_rdir == olddp) {
428 vrele(cwdi->cwdi_rdir);
429 VREF(newdp);
430 cwdi->cwdi_rdir = newdp;
431 }
432 }
433 proclist_unlock_read();
434 if (rootvnode == olddp) {
435 vrele(rootvnode);
436 VREF(newdp);
437 rootvnode = newdp;
438 }
439 vput(newdp);
440 }
441
442 /*
443 * Unmount a file system.
444 *
445 * Note: unmount takes a path to the vnode mounted on as argument,
446 * not special file (as before).
447 */
448 /* ARGSUSED */
449 int
450 sys_unmount(l, v, retval)
451 struct lwp *l;
452 void *v;
453 register_t *retval;
454 {
455 struct sys_unmount_args /* {
456 syscallarg(const char *) path;
457 syscallarg(int) flags;
458 } */ *uap = v;
459 struct proc *p = l->l_proc;
460 struct vnode *vp;
461 struct mount *mp;
462 int error;
463 struct nameidata nd;
464
465 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
466 SCARG(uap, path), p);
467 if ((error = namei(&nd)) != 0)
468 return (error);
469 vp = nd.ni_vp;
470 mp = vp->v_mount;
471
472 /*
473 * Only root, or the user that did the original mount is
474 * permitted to unmount this filesystem.
475 */
476 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
477 (error = suser(p->p_ucred, &p->p_acflag)) != 0) {
478 vput(vp);
479 return (error);
480 }
481
482 /*
483 * Don't allow unmounting the root file system.
484 */
485 if (mp->mnt_flag & MNT_ROOTFS) {
486 vput(vp);
487 return (EINVAL);
488 }
489
490 /*
491 * Must be the root of the filesystem
492 */
493 if ((vp->v_flag & VROOT) == 0) {
494 vput(vp);
495 return (EINVAL);
496 }
497 vput(vp);
498
499 /*
500 * XXX Freeze syncer. Must do this before locking the
501 * mount point. See dounmount() for details.
502 */
503 lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL);
504
505 if (vfs_busy(mp, 0, 0)) {
506 lockmgr(&syncer_lock, LK_RELEASE, NULL);
507 return (EBUSY);
508 }
509
510 return (dounmount(mp, SCARG(uap, flags), p));
511 }
512
513 /*
514 * Do the actual file system unmount. File system is assumed to have been
515 * marked busy by the caller.
516 */
517 int
518 dounmount(mp, flags, p)
519 struct mount *mp;
520 int flags;
521 struct proc *p;
522 {
523 struct vnode *coveredvp;
524 int error;
525 int async;
526 int used_syncer;
527
528 simple_lock(&mountlist_slock);
529 vfs_unbusy(mp);
530 used_syncer = (mp->mnt_syncer != NULL);
531
532 /*
533 * XXX Syncer must be frozen when we get here. This should really
534 * be done on a per-mountpoint basis, but especially the softdep
535 * code possibly called from the syncer doens't exactly work on a
536 * per-mountpoint basis, so the softdep code would become a maze
537 * of vfs_busy() calls.
538 *
539 * The caller of dounmount() must acquire syncer_lock because
540 * the syncer itself acquires locks in syncer_lock -> vfs_busy
541 * order, and we must preserve that order to avoid deadlock.
542 *
543 * So, if the file system did not use the syncer, now is
544 * the time to release the syncer_lock.
545 */
546 if (used_syncer == 0)
547 lockmgr(&syncer_lock, LK_RELEASE, NULL);
548
549 mp->mnt_iflag |= IMNT_UNMOUNT;
550 mp->mnt_unmounter = p;
551 lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock);
552 vn_start_write(NULL, &mp, V_WAIT);
553
554 if (mp->mnt_flag & MNT_EXPUBLIC)
555 vfs_setpublicfs(NULL, NULL, NULL);
556 async = mp->mnt_flag & MNT_ASYNC;
557 mp->mnt_flag &= ~MNT_ASYNC;
558 cache_purgevfs(mp); /* remove cache entries for this file sys */
559 if (mp->mnt_syncer != NULL)
560 vfs_deallocate_syncvnode(mp);
561 error = 0;
562 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
563 #if NFSS > 0
564 error = fss_umount_hook(mp, (flags & MNT_FORCE));
565 #endif
566 if (error == 0)
567 error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p);
568 }
569 if (error == 0 || (flags & MNT_FORCE))
570 error = VFS_UNMOUNT(mp, flags, p);
571 vn_finished_write(mp, 0);
572 simple_lock(&mountlist_slock);
573 if (error) {
574 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0)
575 (void) vfs_allocate_syncvnode(mp);
576 mp->mnt_iflag &= ~IMNT_UNMOUNT;
577 mp->mnt_unmounter = NULL;
578 mp->mnt_flag |= async;
579 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
580 &mountlist_slock);
581 if (used_syncer)
582 lockmgr(&syncer_lock, LK_RELEASE, NULL);
583 simple_lock(&mp->mnt_slock);
584 while (mp->mnt_wcnt > 0) {
585 wakeup(mp);
586 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1",
587 0, &mp->mnt_slock);
588 }
589 simple_unlock(&mp->mnt_slock);
590 return (error);
591 }
592 CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
593 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
594 coveredvp->v_mountedhere = NULL;
595 vrele(coveredvp);
596 }
597 mp->mnt_op->vfs_refcount--;
598 if (LIST_FIRST(&mp->mnt_vnodelist) != NULL)
599 panic("unmount: dangling vnode");
600 mp->mnt_iflag |= IMNT_GONE;
601 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock);
602 if (used_syncer)
603 lockmgr(&syncer_lock, LK_RELEASE, NULL);
604 simple_lock(&mp->mnt_slock);
605 while (mp->mnt_wcnt > 0) {
606 wakeup(mp);
607 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0, &mp->mnt_slock);
608 }
609 simple_unlock(&mp->mnt_slock);
610 free(mp, M_MOUNT);
611 return (0);
612 }
613
614 /*
615 * Sync each mounted filesystem.
616 */
617 #ifdef DEBUG
618 int syncprt = 0;
619 struct ctldebug debug0 = { "syncprt", &syncprt };
620 #endif
621
622 /* ARGSUSED */
623 int
624 sys_sync(l, v, retval)
625 struct lwp *l;
626 void *v;
627 register_t *retval;
628 {
629 struct mount *mp, *nmp;
630 int asyncflag;
631 struct proc *p = l == NULL ? &proc0 : l->l_proc;
632
633 simple_lock(&mountlist_slock);
634 for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) {
635 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) {
636 nmp = mp->mnt_list.cqe_prev;
637 continue;
638 }
639 if ((mp->mnt_flag & MNT_RDONLY) == 0 &&
640 vn_start_write(NULL, &mp, V_NOWAIT) == 0) {
641 asyncflag = mp->mnt_flag & MNT_ASYNC;
642 mp->mnt_flag &= ~MNT_ASYNC;
643 VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);
644 if (asyncflag)
645 mp->mnt_flag |= MNT_ASYNC;
646 vn_finished_write(mp, 0);
647 }
648 simple_lock(&mountlist_slock);
649 nmp = mp->mnt_list.cqe_prev;
650 vfs_unbusy(mp);
651
652 }
653 simple_unlock(&mountlist_slock);
654 #ifdef DEBUG
655 if (syncprt)
656 vfs_bufstats();
657 #endif /* DEBUG */
658 return (0);
659 }
660
661 /*
662 * Change filesystem quotas.
663 */
664 /* ARGSUSED */
665 int
666 sys_quotactl(l, v, retval)
667 struct lwp *l;
668 void *v;
669 register_t *retval;
670 {
671 struct sys_quotactl_args /* {
672 syscallarg(const char *) path;
673 syscallarg(int) cmd;
674 syscallarg(int) uid;
675 syscallarg(caddr_t) arg;
676 } */ *uap = v;
677 struct proc *p = l->l_proc;
678 struct mount *mp;
679 int error;
680 struct nameidata nd;
681
682 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
683 if ((error = namei(&nd)) != 0)
684 return (error);
685 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH);
686 vrele(nd.ni_vp);
687 if (error)
688 return (error);
689 error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
690 SCARG(uap, arg), p);
691 vn_finished_write(mp, 0);
692 return (error);
693 }
694
695 int
696 dostatvfs(struct mount *mp, struct statvfs *sp, struct proc *p, int flags,
697 int root)
698 {
699 struct cwdinfo *cwdi = p->p_cwdi;
700 int error = 0;
701
702 /*
703 * If MNT_NOWAIT or MNT_LAZY is specified, do not
704 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY
705 * overrides MNT_NOWAIT.
706 */
707 if (flags == MNT_NOWAIT || flags == MNT_LAZY ||
708 (flags != MNT_WAIT && flags != 0)) {
709 memcpy(sp, &mp->mnt_stat, sizeof(*sp));
710 goto done;
711 }
712
713 /* Get the filesystem stats now */
714 memset(sp, 0, sizeof(*sp));
715 if ((error = VFS_STATVFS(mp, sp, p)) != 0) {
716 return error;
717 }
718
719 if (cwdi->cwdi_rdir == NULL)
720 (void)memcpy(&mp->mnt_stat, sp, sizeof(mp->mnt_stat));
721 done:
722 if (cwdi->cwdi_rdir != NULL) {
723 size_t len;
724 char *bp;
725 char *path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
726 if (!path)
727 return ENOMEM;
728
729 bp = path + MAXPATHLEN;
730 *--bp = '\0';
731 error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, path,
732 MAXPATHLEN / 2, 0, p);
733 if (error) {
734 free(path, M_TEMP);
735 return error;
736 }
737 len = strlen(bp);
738 /*
739 * for mount points that are below our root, we can see
740 * them, so we fix up the pathname and return them. The
741 * rest we cannot see, so we don't allow viewing the
742 * data.
743 */
744 if (strncmp(bp, sp->f_mntonname, len) == 0) {
745 strlcpy(sp->f_mntonname, &sp->f_mntonname[len],
746 sizeof(sp->f_mntonname));
747 if (sp->f_mntonname[0] == '\0')
748 (void)strlcpy(sp->f_mntonname, "/",
749 sizeof(sp->f_mntonname));
750 } else {
751 if (root)
752 (void)strlcpy(sp->f_mntonname, "/",
753 sizeof(sp->f_mntonname));
754 else
755 error = EPERM;
756 }
757 free(path, M_TEMP);
758 }
759 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK;
760 return error;
761 }
762
763 /*
764 * Get filesystem statistics.
765 */
766 /* ARGSUSED */
767 int
768 sys_statvfs1(l, v, retval)
769 struct lwp *l;
770 void *v;
771 register_t *retval;
772 {
773 struct sys_statvfs1_args /* {
774 syscallarg(const char *) path;
775 syscallarg(struct statvfs *) buf;
776 syscallarg(int) flags;
777 } */ *uap = v;
778 struct proc *p = l->l_proc;
779 struct mount *mp;
780 struct statvfs sbuf;
781 int error;
782 struct nameidata nd;
783
784 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
785 if ((error = namei(&nd)) != 0)
786 return error;
787 mp = nd.ni_vp->v_mount;
788 vrele(nd.ni_vp);
789 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0)
790 return error;
791 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf));
792 }
793
794 /*
795 * Get filesystem statistics.
796 */
797 /* ARGSUSED */
798 int
799 sys_fstatvfs1(l, v, retval)
800 struct lwp *l;
801 void *v;
802 register_t *retval;
803 {
804 struct sys_fstatvfs1_args /* {
805 syscallarg(int) fd;
806 syscallarg(struct statvfs *) buf;
807 syscallarg(int) flags;
808 } */ *uap = v;
809 struct proc *p = l->l_proc;
810 struct file *fp;
811 struct mount *mp;
812 struct statvfs sbuf;
813 int error;
814
815 /* getvnode() will use the descriptor for us */
816 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
817 return (error);
818 mp = ((struct vnode *)fp->f_data)->v_mount;
819 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0)
820 goto out;
821 error = copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf));
822 out:
823 FILE_UNUSE(fp, p);
824 return error;
825 }
826
827
828 /*
829 * Get statistics on all filesystems.
830 */
831 int
832 sys_getvfsstat(l, v, retval)
833 struct lwp *l;
834 void *v;
835 register_t *retval;
836 {
837 struct sys_getvfsstat_args /* {
838 syscallarg(struct statvfs *) buf;
839 syscallarg(size_t) bufsize;
840 syscallarg(int) flags;
841 } */ *uap = v;
842 int root = 0;
843 struct proc *p = l->l_proc;
844 struct mount *mp, *nmp;
845 struct statvfs sbuf;
846 struct statvfs *sfsp;
847 size_t count, maxcount;
848 int error = 0;
849
850 maxcount = SCARG(uap, bufsize) / sizeof(struct statvfs);
851 sfsp = SCARG(uap, buf);
852 simple_lock(&mountlist_slock);
853 count = 0;
854 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist;
855 mp = nmp) {
856 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) {
857 nmp = CIRCLEQ_NEXT(mp, mnt_list);
858 continue;
859 }
860 if (sfsp && count < maxcount) {
861 error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 0);
862 if (error) {
863 simple_lock(&mountlist_slock);
864 nmp = CIRCLEQ_NEXT(mp, mnt_list);
865 vfs_unbusy(mp);
866 continue;
867 }
868 error = copyout(&sbuf, sfsp, sizeof(*sfsp));
869 if (error) {
870 vfs_unbusy(mp);
871 return (error);
872 }
873 sfsp++;
874 root |= strcmp(sbuf.f_mntonname, "/") == 0;
875 }
876 count++;
877 simple_lock(&mountlist_slock);
878 nmp = CIRCLEQ_NEXT(mp, mnt_list);
879 vfs_unbusy(mp);
880 }
881 simple_unlock(&mountlist_slock);
882 if (root == 0 && p->p_cwdi->cwdi_rdir) {
883 /*
884 * fake a root entry
885 */
886 if ((error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, &sbuf, p,
887 SCARG(uap, flags), 1)) != 0)
888 return error;
889 if (sfsp)
890 error = copyout(&sbuf, sfsp, sizeof(*sfsp));
891 count++;
892 }
893 if (sfsp && count > maxcount)
894 *retval = maxcount;
895 else
896 *retval = count;
897 return error;
898 }
899
900 /*
901 * Change current working directory to a given file descriptor.
902 */
903 /* ARGSUSED */
904 int
905 sys_fchdir(l, v, retval)
906 struct lwp *l;
907 void *v;
908 register_t *retval;
909 {
910 struct sys_fchdir_args /* {
911 syscallarg(int) fd;
912 } */ *uap = v;
913 struct proc *p = l->l_proc;
914 struct filedesc *fdp = p->p_fd;
915 struct cwdinfo *cwdi = p->p_cwdi;
916 struct vnode *vp, *tdp;
917 struct mount *mp;
918 struct file *fp;
919 int error;
920
921 /* getvnode() will use the descriptor for us */
922 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
923 return (error);
924 vp = (struct vnode *)fp->f_data;
925
926 VREF(vp);
927 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
928 if (vp->v_type != VDIR)
929 error = ENOTDIR;
930 else
931 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
932 while (!error && (mp = vp->v_mountedhere) != NULL) {
933 if (vfs_busy(mp, 0, 0))
934 continue;
935 error = VFS_ROOT(mp, &tdp);
936 vfs_unbusy(mp);
937 if (error)
938 break;
939 vput(vp);
940 vp = tdp;
941 }
942 if (error) {
943 vput(vp);
944 goto out;
945 }
946 VOP_UNLOCK(vp, 0);
947
948 /*
949 * Disallow changing to a directory not under the process's
950 * current root directory (if there is one).
951 */
952 if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, p)) {
953 vrele(vp);
954 error = EPERM; /* operation not permitted */
955 goto out;
956 }
957
958 vrele(cwdi->cwdi_cdir);
959 cwdi->cwdi_cdir = vp;
960 out:
961 FILE_UNUSE(fp, p);
962 return (error);
963 }
964
965 /*
966 * Change this process's notion of the root directory to a given file descriptor.
967 */
968
969 int
970 sys_fchroot(l, v, retval)
971 struct lwp *l;
972 void *v;
973 register_t *retval;
974 {
975 struct sys_fchroot_args *uap = v;
976 struct proc *p = l->l_proc;
977 struct filedesc *fdp = p->p_fd;
978 struct cwdinfo *cwdi = p->p_cwdi;
979 struct vnode *vp;
980 struct file *fp;
981 int error;
982
983 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
984 return error;
985 /* getvnode() will use the descriptor for us */
986 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
987 return error;
988 vp = (struct vnode *) fp->f_data;
989 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
990 if (vp->v_type != VDIR)
991 error = ENOTDIR;
992 else
993 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
994 VOP_UNLOCK(vp, 0);
995 if (error)
996 goto out;
997 VREF(vp);
998
999 /*
1000 * Prevent escaping from chroot by putting the root under
1001 * the working directory. Silently chdir to / if we aren't
1002 * already there.
1003 */
1004 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) {
1005 /*
1006 * XXX would be more failsafe to change directory to a
1007 * deadfs node here instead
1008 */
1009 vrele(cwdi->cwdi_cdir);
1010 VREF(vp);
1011 cwdi->cwdi_cdir = vp;
1012 }
1013
1014 if (cwdi->cwdi_rdir != NULL)
1015 vrele(cwdi->cwdi_rdir);
1016 cwdi->cwdi_rdir = vp;
1017 out:
1018 FILE_UNUSE(fp, p);
1019 return (error);
1020 }
1021
1022
1023
1024 /*
1025 * Change current working directory (``.'').
1026 */
1027 /* ARGSUSED */
1028 int
1029 sys_chdir(l, v, retval)
1030 struct lwp *l;
1031 void *v;
1032 register_t *retval;
1033 {
1034 struct sys_chdir_args /* {
1035 syscallarg(const char *) path;
1036 } */ *uap = v;
1037 struct proc *p = l->l_proc;
1038 struct cwdinfo *cwdi = p->p_cwdi;
1039 int error;
1040 struct nameidata nd;
1041
1042 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
1043 SCARG(uap, path), p);
1044 if ((error = change_dir(&nd, p)) != 0)
1045 return (error);
1046 vrele(cwdi->cwdi_cdir);
1047 cwdi->cwdi_cdir = nd.ni_vp;
1048 return (0);
1049 }
1050
1051 /*
1052 * Change notion of root (``/'') directory.
1053 */
1054 /* ARGSUSED */
1055 int
1056 sys_chroot(l, v, retval)
1057 struct lwp *l;
1058 void *v;
1059 register_t *retval;
1060 {
1061 struct sys_chroot_args /* {
1062 syscallarg(const char *) path;
1063 } */ *uap = v;
1064 struct proc *p = l->l_proc;
1065 struct cwdinfo *cwdi = p->p_cwdi;
1066 struct vnode *vp;
1067 int error;
1068 struct nameidata nd;
1069
1070 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
1071 return (error);
1072 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
1073 SCARG(uap, path), p);
1074 if ((error = change_dir(&nd, p)) != 0)
1075 return (error);
1076 if (cwdi->cwdi_rdir != NULL)
1077 vrele(cwdi->cwdi_rdir);
1078 vp = nd.ni_vp;
1079 cwdi->cwdi_rdir = vp;
1080
1081 /*
1082 * Prevent escaping from chroot by putting the root under
1083 * the working directory. Silently chdir to / if we aren't
1084 * already there.
1085 */
1086 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) {
1087 /*
1088 * XXX would be more failsafe to change directory to a
1089 * deadfs node here instead
1090 */
1091 vrele(cwdi->cwdi_cdir);
1092 VREF(vp);
1093 cwdi->cwdi_cdir = vp;
1094 }
1095
1096 return (0);
1097 }
1098
1099 /*
1100 * Common routine for chroot and chdir.
1101 */
1102 static int
1103 change_dir(ndp, p)
1104 struct nameidata *ndp;
1105 struct proc *p;
1106 {
1107 struct vnode *vp;
1108 int error;
1109
1110 if ((error = namei(ndp)) != 0)
1111 return (error);
1112 vp = ndp->ni_vp;
1113 if (vp->v_type != VDIR)
1114 error = ENOTDIR;
1115 else
1116 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
1117
1118 if (error)
1119 vput(vp);
1120 else
1121 VOP_UNLOCK(vp, 0);
1122 return (error);
1123 }
1124
1125 /*
1126 * Check permissions, allocate an open file structure,
1127 * and call the device open routine if any.
1128 */
1129 int
1130 sys_open(l, v, retval)
1131 struct lwp *l;
1132 void *v;
1133 register_t *retval;
1134 {
1135 struct sys_open_args /* {
1136 syscallarg(const char *) path;
1137 syscallarg(int) flags;
1138 syscallarg(int) mode;
1139 } */ *uap = v;
1140 struct proc *p = l->l_proc;
1141 struct cwdinfo *cwdi = p->p_cwdi;
1142 struct filedesc *fdp = p->p_fd;
1143 struct file *fp;
1144 struct vnode *vp;
1145 int flags, cmode;
1146 int type, indx, error;
1147 struct flock lf;
1148 struct nameidata nd;
1149
1150 flags = FFLAGS(SCARG(uap, flags));
1151 if ((flags & (FREAD | FWRITE)) == 0)
1152 return (EINVAL);
1153 /* falloc() will use the file descriptor for us */
1154 if ((error = falloc(p, &fp, &indx)) != 0)
1155 return (error);
1156 cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT;
1157 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
1158 l->l_dupfd = -indx - 1; /* XXX check for fdopen */
1159 if ((error = vn_open(&nd, flags, cmode)) != 0) {
1160 FILE_UNUSE(fp, p);
1161 fdp->fd_ofiles[indx] = NULL;
1162 ffree(fp);
1163 if ((error == EDUPFD || error == EMOVEFD) &&
1164 l->l_dupfd >= 0 && /* XXX from fdopen */
1165 (error =
1166 dupfdopen(p, indx, l->l_dupfd, flags, error)) == 0) {
1167 *retval = indx;
1168 return (0);
1169 }
1170 if (error == ERESTART)
1171 error = EINTR;
1172 fdremove(fdp, indx);
1173 return (error);
1174 }
1175 l->l_dupfd = 0;
1176 vp = nd.ni_vp;
1177 fp->f_flag = flags & FMASK;
1178 fp->f_type = DTYPE_VNODE;
1179 fp->f_ops = &vnops;
1180 fp->f_data = vp;
1181 if (flags & (O_EXLOCK | O_SHLOCK)) {
1182 lf.l_whence = SEEK_SET;
1183 lf.l_start = 0;
1184 lf.l_len = 0;
1185 if (flags & O_EXLOCK)
1186 lf.l_type = F_WRLCK;
1187 else
1188 lf.l_type = F_RDLCK;
1189 type = F_FLOCK;
1190 if ((flags & FNONBLOCK) == 0)
1191 type |= F_WAIT;
1192 VOP_UNLOCK(vp, 0);
1193 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type);
1194 if (error) {
1195 (void) vn_close(vp, fp->f_flag, fp->f_cred, p);
1196 FILE_UNUSE(fp, p);
1197 ffree(fp);
1198 fdremove(fdp, indx);
1199 return (error);
1200 }
1201 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1202 fp->f_flag |= FHASLOCK;
1203 }
1204 VOP_UNLOCK(vp, 0);
1205 *retval = indx;
1206 FILE_SET_MATURE(fp);
1207 FILE_UNUSE(fp, p);
1208 return (0);
1209 }
1210
1211 /*
1212 * Get file handle system call
1213 */
1214 int
1215 sys_getfh(l, v, retval)
1216 struct lwp *l;
1217 void *v;
1218 register_t *retval;
1219 {
1220 struct sys_getfh_args /* {
1221 syscallarg(char *) fname;
1222 syscallarg(fhandle_t *) fhp;
1223 } */ *uap = v;
1224 struct proc *p = l->l_proc;
1225 struct vnode *vp;
1226 fhandle_t fh;
1227 int error;
1228 struct nameidata nd;
1229
1230 /*
1231 * Must be super user
1232 */
1233 error = suser(p->p_ucred, &p->p_acflag);
1234 if (error)
1235 return (error);
1236 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
1237 SCARG(uap, fname), p);
1238 error = namei(&nd);
1239 if (error)
1240 return (error);
1241 vp = nd.ni_vp;
1242 memset(&fh, 0, sizeof(fh));
1243 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsidx;
1244 error = VFS_VPTOFH(vp, &fh.fh_fid);
1245 vput(vp);
1246 if (error)
1247 return (error);
1248 error = copyout(&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh));
1249 return (error);
1250 }
1251
1252 /*
1253 * Open a file given a file handle.
1254 *
1255 * Check permissions, allocate an open file structure,
1256 * and call the device open routine if any.
1257 */
1258 int
1259 sys_fhopen(l, v, retval)
1260 struct lwp *l;
1261 void *v;
1262 register_t *retval;
1263 {
1264 struct sys_fhopen_args /* {
1265 syscallarg(const fhandle_t *) fhp;
1266 syscallarg(int) flags;
1267 } */ *uap = v;
1268 struct proc *p = l->l_proc;
1269 struct filedesc *fdp = p->p_fd;
1270 struct file *fp;
1271 struct vnode *vp = NULL;
1272 struct mount *mp;
1273 struct ucred *cred = p->p_ucred;
1274 int flags;
1275 struct file *nfp;
1276 int type, indx, error=0;
1277 struct flock lf;
1278 struct vattr va;
1279 fhandle_t fh;
1280
1281 /*
1282 * Must be super user
1283 */
1284 if ((error = suser(p->p_ucred, &p->p_acflag)))
1285 return (error);
1286
1287 flags = FFLAGS(SCARG(uap, flags));
1288 if ((flags & (FREAD | FWRITE)) == 0)
1289 return (EINVAL);
1290 if ((flags & O_CREAT))
1291 return (EINVAL);
1292 /* falloc() will use the file descriptor for us */
1293 if ((error = falloc(p, &nfp, &indx)) != 0)
1294 return (error);
1295 fp = nfp;
1296 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
1297 goto bad;
1298
1299 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {
1300 error = ESTALE;
1301 goto bad;
1302 }
1303
1304 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) {
1305 vp = NULL; /* most likely unnecessary sanity for bad: */
1306 goto bad;
1307 }
1308
1309 /* Now do an effective vn_open */
1310
1311 if (vp->v_type == VSOCK) {
1312 error = EOPNOTSUPP;
1313 goto bad;
1314 }
1315 if (flags & FREAD) {
1316 if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0)
1317 goto bad;
1318 }
1319 if (flags & (FWRITE | O_TRUNC)) {
1320 if (vp->v_type == VDIR) {
1321 error = EISDIR;
1322 goto bad;
1323 }
1324 if ((error = vn_writechk(vp)) != 0 ||
1325 (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0)
1326 goto bad;
1327 }
1328 if (flags & O_TRUNC) {
1329 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
1330 goto bad;
1331 VOP_UNLOCK(vp, 0); /* XXX */
1332 VOP_LEASE(vp, p, cred, LEASE_WRITE);
1333 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */
1334 VATTR_NULL(&va);
1335 va.va_size = 0;
1336 error = VOP_SETATTR(vp, &va, cred, p);
1337 vn_finished_write(mp, 0);
1338 if (error)
1339 goto bad;
1340 }
1341 if ((error = VOP_OPEN(vp, flags, cred, p)) != 0)
1342 goto bad;
1343 if (vp->v_type == VREG &&
1344 uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) {
1345 error = EIO;
1346 goto bad;
1347 }
1348 if (flags & FWRITE)
1349 vp->v_writecount++;
1350
1351 /* done with modified vn_open, now finish what sys_open does. */
1352
1353 fp->f_flag = flags & FMASK;
1354 fp->f_type = DTYPE_VNODE;
1355 fp->f_ops = &vnops;
1356 fp->f_data = vp;
1357 if (flags & (O_EXLOCK | O_SHLOCK)) {
1358 lf.l_whence = SEEK_SET;
1359 lf.l_start = 0;
1360 lf.l_len = 0;
1361 if (flags & O_EXLOCK)
1362 lf.l_type = F_WRLCK;
1363 else
1364 lf.l_type = F_RDLCK;
1365 type = F_FLOCK;
1366 if ((flags & FNONBLOCK) == 0)
1367 type |= F_WAIT;
1368 VOP_UNLOCK(vp, 0);
1369 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type);
1370 if (error) {
1371 (void) vn_close(vp, fp->f_flag, fp->f_cred, p);
1372 FILE_UNUSE(fp, p);
1373 ffree(fp);
1374 fdremove(fdp, indx);
1375 return (error);
1376 }
1377 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1378 fp->f_flag |= FHASLOCK;
1379 }
1380 VOP_UNLOCK(vp, 0);
1381 *retval = indx;
1382 FILE_SET_MATURE(fp);
1383 FILE_UNUSE(fp, p);
1384 return (0);
1385
1386 bad:
1387 FILE_UNUSE(fp, p);
1388 ffree(fp);
1389 fdremove(fdp, indx);
1390 if (vp != NULL)
1391 vput(vp);
1392 return (error);
1393 }
1394
1395 /* ARGSUSED */
1396 int
1397 sys_fhstat(l, v, retval)
1398 struct lwp *l;
1399 void *v;
1400 register_t *retval;
1401 {
1402 struct sys_fhstat_args /* {
1403 syscallarg(const fhandle_t *) fhp;
1404 syscallarg(struct stat *) sb;
1405 } */ *uap = v;
1406 struct proc *p = l->l_proc;
1407 struct stat sb;
1408 int error;
1409 fhandle_t fh;
1410 struct mount *mp;
1411 struct vnode *vp;
1412
1413 /*
1414 * Must be super user
1415 */
1416 if ((error = suser(p->p_ucred, &p->p_acflag)))
1417 return (error);
1418
1419 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
1420 return (error);
1421
1422 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
1423 return (ESTALE);
1424 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
1425 return (error);
1426 error = vn_stat(vp, &sb, p);
1427 vput(vp);
1428 if (error)
1429 return (error);
1430 error = copyout(&sb, SCARG(uap, sb), sizeof(sb));
1431 return (error);
1432 }
1433
1434 /* ARGSUSED */
1435 int
1436 sys_fhstatvfs1(l, v, retval)
1437 struct lwp *l;
1438 void *v;
1439 register_t *retval;
1440 {
1441 struct sys_fhstatvfs1_args /*
1442 syscallarg(const fhandle_t *) fhp;
1443 syscallarg(struct statvfs *) buf;
1444 syscallarg(int) flags;
1445 } */ *uap = v;
1446 struct proc *p = l->l_proc;
1447 struct statvfs sbuf;
1448 fhandle_t fh;
1449 struct mount *mp;
1450 struct vnode *vp;
1451 int error;
1452
1453 /*
1454 * Must be super user
1455 */
1456 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
1457 return error;
1458
1459 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
1460 return error;
1461
1462 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
1463 return ESTALE;
1464 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
1465 return error;
1466
1467 mp = vp->v_mount;
1468 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) {
1469 vput(vp);
1470 return error;
1471 }
1472 vput(vp);
1473 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf));
1474 }
1475
1476 /*
1477 * Create a special file.
1478 */
1479 /* ARGSUSED */
1480 int
1481 sys_mknod(l, v, retval)
1482 struct lwp *l;
1483 void *v;
1484 register_t *retval;
1485 {
1486 struct sys_mknod_args /* {
1487 syscallarg(const char *) path;
1488 syscallarg(int) mode;
1489 syscallarg(int) dev;
1490 } */ *uap = v;
1491 struct proc *p = l->l_proc;
1492 struct vnode *vp;
1493 struct mount *mp;
1494 struct vattr vattr;
1495 int error;
1496 int whiteout = 0;
1497 struct nameidata nd;
1498
1499 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
1500 return (error);
1501 restart:
1502 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
1503 if ((error = namei(&nd)) != 0)
1504 return (error);
1505 vp = nd.ni_vp;
1506 if (vp != NULL)
1507 error = EEXIST;
1508 else {
1509 VATTR_NULL(&vattr);
1510 vattr.va_mode =
1511 (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask;
1512 vattr.va_rdev = SCARG(uap, dev);
1513 whiteout = 0;
1514
1515 switch (SCARG(uap, mode) & S_IFMT) {
1516 case S_IFMT: /* used by badsect to flag bad sectors */
1517 vattr.va_type = VBAD;
1518 break;
1519 case S_IFCHR:
1520 vattr.va_type = VCHR;
1521 break;
1522 case S_IFBLK:
1523 vattr.va_type = VBLK;
1524 break;
1525 case S_IFWHT:
1526 whiteout = 1;
1527 break;
1528 default:
1529 error = EINVAL;
1530 break;
1531 }
1532 }
1533 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
1534 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1535 if (nd.ni_dvp == vp)
1536 vrele(nd.ni_dvp);
1537 else
1538 vput(nd.ni_dvp);
1539 if (vp)
1540 vrele(vp);
1541 if ((error = vn_start_write(NULL, &mp,
1542 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
1543 return (error);
1544 goto restart;
1545 }
1546 if (!error) {
1547 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
1548 if (whiteout) {
1549 error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
1550 if (error)
1551 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1552 vput(nd.ni_dvp);
1553 } else {
1554 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
1555 &nd.ni_cnd, &vattr);
1556 if (error == 0)
1557 vput(nd.ni_vp);
1558 }
1559 } else {
1560 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1561 if (nd.ni_dvp == vp)
1562 vrele(nd.ni_dvp);
1563 else
1564 vput(nd.ni_dvp);
1565 if (vp)
1566 vrele(vp);
1567 }
1568 vn_finished_write(mp, 0);
1569 return (error);
1570 }
1571
1572 /*
1573 * Create a named pipe.
1574 */
1575 /* ARGSUSED */
1576 int
1577 sys_mkfifo(l, v, retval)
1578 struct lwp *l;
1579 void *v;
1580 register_t *retval;
1581 {
1582 struct sys_mkfifo_args /* {
1583 syscallarg(const char *) path;
1584 syscallarg(int) mode;
1585 } */ *uap = v;
1586 struct proc *p = l->l_proc;
1587 struct mount *mp;
1588 struct vattr vattr;
1589 int error;
1590 struct nameidata nd;
1591
1592 restart:
1593 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
1594 if ((error = namei(&nd)) != 0)
1595 return (error);
1596 if (nd.ni_vp != NULL) {
1597 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1598 if (nd.ni_dvp == nd.ni_vp)
1599 vrele(nd.ni_dvp);
1600 else
1601 vput(nd.ni_dvp);
1602 vrele(nd.ni_vp);
1603 return (EEXIST);
1604 }
1605 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
1606 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1607 if (nd.ni_dvp == nd.ni_vp)
1608 vrele(nd.ni_dvp);
1609 else
1610 vput(nd.ni_dvp);
1611 if (nd.ni_vp)
1612 vrele(nd.ni_vp);
1613 if ((error = vn_start_write(NULL, &mp,
1614 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
1615 return (error);
1616 goto restart;
1617 }
1618 VATTR_NULL(&vattr);
1619 vattr.va_type = VFIFO;
1620 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask;
1621 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
1622 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
1623 if (error == 0)
1624 vput(nd.ni_vp);
1625 vn_finished_write(mp, 0);
1626 return (error);
1627 }
1628
1629 /*
1630 * Make a hard file link.
1631 */
1632 /* ARGSUSED */
1633 int
1634 sys_link(l, v, retval)
1635 struct lwp *l;
1636 void *v;
1637 register_t *retval;
1638 {
1639 struct sys_link_args /* {
1640 syscallarg(const char *) path;
1641 syscallarg(const char *) link;
1642 } */ *uap = v;
1643 struct proc *p = l->l_proc;
1644 struct vnode *vp;
1645 struct mount *mp;
1646 struct nameidata nd;
1647 int error;
1648
1649 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
1650 if ((error = namei(&nd)) != 0)
1651 return (error);
1652 vp = nd.ni_vp;
1653 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) {
1654 vrele(vp);
1655 return (error);
1656 }
1657 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);
1658 if ((error = namei(&nd)) != 0)
1659 goto out;
1660 if (nd.ni_vp) {
1661 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1662 if (nd.ni_dvp == nd.ni_vp)
1663 vrele(nd.ni_dvp);
1664 else
1665 vput(nd.ni_dvp);
1666 vrele(nd.ni_vp);
1667 error = EEXIST;
1668 goto out;
1669 }
1670 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
1671 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
1672 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
1673 out:
1674 vrele(vp);
1675 vn_finished_write(mp, 0);
1676 return (error);
1677 }
1678
1679 /*
1680 * Make a symbolic link.
1681 */
1682 /* ARGSUSED */
1683 int
1684 sys_symlink(l, v, retval)
1685 struct lwp *l;
1686 void *v;
1687 register_t *retval;
1688 {
1689 struct sys_symlink_args /* {
1690 syscallarg(const char *) path;
1691 syscallarg(const char *) link;
1692 } */ *uap = v;
1693 struct proc *p = l->l_proc;
1694 struct mount *mp;
1695 struct vattr vattr;
1696 char *path;
1697 int error;
1698 struct nameidata nd;
1699
1700 path = PNBUF_GET();
1701 error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL);
1702 if (error)
1703 goto out;
1704 restart:
1705 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);
1706 if ((error = namei(&nd)) != 0)
1707 goto out;
1708 if (nd.ni_vp) {
1709 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1710 if (nd.ni_dvp == nd.ni_vp)
1711 vrele(nd.ni_dvp);
1712 else
1713 vput(nd.ni_dvp);
1714 vrele(nd.ni_vp);
1715 error = EEXIST;
1716 goto out;
1717 }
1718 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
1719 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1720 if (nd.ni_dvp == nd.ni_vp)
1721 vrele(nd.ni_dvp);
1722 else
1723 vput(nd.ni_dvp);
1724 if ((error = vn_start_write(NULL, &mp,
1725 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
1726 return (error);
1727 goto restart;
1728 }
1729 VATTR_NULL(&vattr);
1730 vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask;
1731 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
1732 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
1733 if (error == 0)
1734 vput(nd.ni_vp);
1735 vn_finished_write(mp, 0);
1736 out:
1737 PNBUF_PUT(path);
1738 return (error);
1739 }
1740
1741 /*
1742 * Delete a whiteout from the filesystem.
1743 */
1744 /* ARGSUSED */
1745 int
1746 sys_undelete(l, v, retval)
1747 struct lwp *l;
1748 void *v;
1749 register_t *retval;
1750 {
1751 struct sys_undelete_args /* {
1752 syscallarg(const char *) path;
1753 } */ *uap = v;
1754 struct proc *p = l->l_proc;
1755 int error;
1756 struct mount *mp;
1757 struct nameidata nd;
1758
1759 restart:
1760 NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
1761 SCARG(uap, path), p);
1762 error = namei(&nd);
1763 if (error)
1764 return (error);
1765
1766 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
1767 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1768 if (nd.ni_dvp == nd.ni_vp)
1769 vrele(nd.ni_dvp);
1770 else
1771 vput(nd.ni_dvp);
1772 if (nd.ni_vp)
1773 vrele(nd.ni_vp);
1774 return (EEXIST);
1775 }
1776 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
1777 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1778 if (nd.ni_dvp == nd.ni_vp)
1779 vrele(nd.ni_dvp);
1780 else
1781 vput(nd.ni_dvp);
1782 if ((error = vn_start_write(NULL, &mp,
1783 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
1784 return (error);
1785 goto restart;
1786 }
1787 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
1788 if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0)
1789 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1790 vput(nd.ni_dvp);
1791 vn_finished_write(mp, 0);
1792 return (error);
1793 }
1794
1795 /*
1796 * Delete a name from the filesystem.
1797 */
1798 /* ARGSUSED */
1799 int
1800 sys_unlink(l, v, retval)
1801 struct lwp *l;
1802 void *v;
1803 register_t *retval;
1804 {
1805 struct sys_unlink_args /* {
1806 syscallarg(const char *) path;
1807 } */ *uap = v;
1808 struct proc *p = l->l_proc;
1809 struct mount *mp;
1810 struct vnode *vp;
1811 int error;
1812 struct nameidata nd;
1813
1814 restart:
1815 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
1816 SCARG(uap, path), p);
1817 if ((error = namei(&nd)) != 0)
1818 return (error);
1819 vp = nd.ni_vp;
1820
1821 /*
1822 * The root of a mounted filesystem cannot be deleted.
1823 */
1824 if (vp->v_flag & VROOT) {
1825 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1826 if (nd.ni_dvp == vp)
1827 vrele(nd.ni_dvp);
1828 else
1829 vput(nd.ni_dvp);
1830 vput(vp);
1831 error = EBUSY;
1832 goto out;
1833 }
1834
1835 #ifdef VERIFIED_EXEC
1836 /* Handle remove requests for veriexec entries. */
1837 if ((error = veriexec_removechk(p, vp, nd.ni_dirp)) != 0) {
1838 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1839 if (nd.ni_dvp == vp)
1840 vrele(nd.ni_dvp);
1841 else
1842 vput(nd.ni_dvp);
1843 vput(vp);
1844 goto out;
1845 }
1846 #endif /* VERIFIED_EXEC */
1847
1848 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
1849 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
1850 if (nd.ni_dvp == vp)
1851 vrele(nd.ni_dvp);
1852 else
1853 vput(nd.ni_dvp);
1854 vput(vp);
1855 if ((error = vn_start_write(NULL, &mp,
1856 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
1857 return (error);
1858 goto restart;
1859 }
1860 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
1861 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
1862 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
1863 vn_finished_write(mp, 0);
1864 out:
1865 return (error);
1866 }
1867
1868 /*
1869 * Reposition read/write file offset.
1870 */
1871 int
1872 sys_lseek(l, v, retval)
1873 struct lwp *l;
1874 void *v;
1875 register_t *retval;
1876 {
1877 struct sys_lseek_args /* {
1878 syscallarg(int) fd;
1879 syscallarg(int) pad;
1880 syscallarg(off_t) offset;
1881 syscallarg(int) whence;
1882 } */ *uap = v;
1883 struct proc *p = l->l_proc;
1884 struct ucred *cred = p->p_ucred;
1885 struct filedesc *fdp = p->p_fd;
1886 struct file *fp;
1887 struct vnode *vp;
1888 struct vattr vattr;
1889 off_t newoff;
1890 int error;
1891
1892 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
1893 return (EBADF);
1894
1895 FILE_USE(fp);
1896
1897 vp = (struct vnode *)fp->f_data;
1898 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
1899 error = ESPIPE;
1900 goto out;
1901 }
1902
1903 switch (SCARG(uap, whence)) {
1904 case SEEK_CUR:
1905 newoff = fp->f_offset + SCARG(uap, offset);
1906 break;
1907 case SEEK_END:
1908 error = VOP_GETATTR(vp, &vattr, cred, p);
1909 if (error)
1910 goto out;
1911 newoff = SCARG(uap, offset) + vattr.va_size;
1912 break;
1913 case SEEK_SET:
1914 newoff = SCARG(uap, offset);
1915 break;
1916 default:
1917 error = EINVAL;
1918 goto out;
1919 }
1920 if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0)
1921 goto out;
1922
1923 *(off_t *)retval = fp->f_offset = newoff;
1924 out:
1925 FILE_UNUSE(fp, p);
1926 return (error);
1927 }
1928
1929 /*
1930 * Positional read system call.
1931 */
1932 int
1933 sys_pread(l, v, retval)
1934 struct lwp *l;
1935 void *v;
1936 register_t *retval;
1937 {
1938 struct sys_pread_args /* {
1939 syscallarg(int) fd;
1940 syscallarg(void *) buf;
1941 syscallarg(size_t) nbyte;
1942 syscallarg(off_t) offset;
1943 } */ *uap = v;
1944 struct proc *p = l->l_proc;
1945 struct filedesc *fdp = p->p_fd;
1946 struct file *fp;
1947 struct vnode *vp;
1948 off_t offset;
1949 int error, fd = SCARG(uap, fd);
1950
1951 if ((fp = fd_getfile(fdp, fd)) == NULL)
1952 return (EBADF);
1953
1954 if ((fp->f_flag & FREAD) == 0) {
1955 simple_unlock(&fp->f_slock);
1956 return (EBADF);
1957 }
1958
1959 FILE_USE(fp);
1960
1961 vp = (struct vnode *)fp->f_data;
1962 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
1963 error = ESPIPE;
1964 goto out;
1965 }
1966
1967 offset = SCARG(uap, offset);
1968
1969 /*
1970 * XXX This works because no file systems actually
1971 * XXX take any action on the seek operation.
1972 */
1973 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
1974 goto out;
1975
1976 /* dofileread() will unuse the descriptor for us */
1977 return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),
1978 &offset, 0, retval));
1979
1980 out:
1981 FILE_UNUSE(fp, p);
1982 return (error);
1983 }
1984
1985 /*
1986 * Positional scatter read system call.
1987 */
1988 int
1989 sys_preadv(l, v, retval)
1990 struct lwp *l;
1991 void *v;
1992 register_t *retval;
1993 {
1994 struct sys_preadv_args /* {
1995 syscallarg(int) fd;
1996 syscallarg(const struct iovec *) iovp;
1997 syscallarg(int) iovcnt;
1998 syscallarg(off_t) offset;
1999 } */ *uap = v;
2000 struct proc *p = l->l_proc;
2001 struct filedesc *fdp = p->p_fd;
2002 struct file *fp;
2003 struct vnode *vp;
2004 off_t offset;
2005 int error, fd = SCARG(uap, fd);
2006
2007 if ((fp = fd_getfile(fdp, fd)) == NULL)
2008 return (EBADF);
2009
2010 if ((fp->f_flag & FREAD) == 0) {
2011 simple_unlock(&fp->f_slock);
2012 return (EBADF);
2013 }
2014
2015 FILE_USE(fp);
2016
2017 vp = (struct vnode *)fp->f_data;
2018 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
2019 error = ESPIPE;
2020 goto out;
2021 }
2022
2023 offset = SCARG(uap, offset);
2024
2025 /*
2026 * XXX This works because no file systems actually
2027 * XXX take any action on the seek operation.
2028 */
2029 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
2030 goto out;
2031
2032 /* dofilereadv() will unuse the descriptor for us */
2033 return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),
2034 &offset, 0, retval));
2035
2036 out:
2037 FILE_UNUSE(fp, p);
2038 return (error);
2039 }
2040
2041 /*
2042 * Positional write system call.
2043 */
2044 int
2045 sys_pwrite(l, v, retval)
2046 struct lwp *l;
2047 void *v;
2048 register_t *retval;
2049 {
2050 struct sys_pwrite_args /* {
2051 syscallarg(int) fd;
2052 syscallarg(const void *) buf;
2053 syscallarg(size_t) nbyte;
2054 syscallarg(off_t) offset;
2055 } */ *uap = v;
2056 struct proc *p = l->l_proc;
2057 struct filedesc *fdp = p->p_fd;
2058 struct file *fp;
2059 struct vnode *vp;
2060 off_t offset;
2061 int error, fd = SCARG(uap, fd);
2062
2063 if ((fp = fd_getfile(fdp, fd)) == NULL)
2064 return (EBADF);
2065
2066 if ((fp->f_flag & FWRITE) == 0) {
2067 simple_unlock(&fp->f_slock);
2068 return (EBADF);
2069 }
2070
2071 FILE_USE(fp);
2072
2073 vp = (struct vnode *)fp->f_data;
2074 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
2075 error = ESPIPE;
2076 goto out;
2077 }
2078
2079 offset = SCARG(uap, offset);
2080
2081 /*
2082 * XXX This works because no file systems actually
2083 * XXX take any action on the seek operation.
2084 */
2085 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
2086 goto out;
2087
2088 /* dofilewrite() will unuse the descriptor for us */
2089 return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),
2090 &offset, 0, retval));
2091
2092 out:
2093 FILE_UNUSE(fp, p);
2094 return (error);
2095 }
2096
2097 /*
2098 * Positional gather write system call.
2099 */
2100 int
2101 sys_pwritev(l, v, retval)
2102 struct lwp *l;
2103 void *v;
2104 register_t *retval;
2105 {
2106 struct sys_pwritev_args /* {
2107 syscallarg(int) fd;
2108 syscallarg(const struct iovec *) iovp;
2109 syscallarg(int) iovcnt;
2110 syscallarg(off_t) offset;
2111 } */ *uap = v;
2112 struct proc *p = l->l_proc;
2113 struct filedesc *fdp = p->p_fd;
2114 struct file *fp;
2115 struct vnode *vp;
2116 off_t offset;
2117 int error, fd = SCARG(uap, fd);
2118
2119 if ((fp = fd_getfile(fdp, fd)) == NULL)
2120 return (EBADF);
2121
2122 if ((fp->f_flag & FWRITE) == 0) {
2123 simple_unlock(&fp->f_slock);
2124 return (EBADF);
2125 }
2126
2127 FILE_USE(fp);
2128
2129 vp = (struct vnode *)fp->f_data;
2130 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {
2131 error = ESPIPE;
2132 goto out;
2133 }
2134
2135 offset = SCARG(uap, offset);
2136
2137 /*
2138 * XXX This works because no file systems actually
2139 * XXX take any action on the seek operation.
2140 */
2141 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0)
2142 goto out;
2143
2144 /* dofilewritev() will unuse the descriptor for us */
2145 return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),
2146 &offset, 0, retval));
2147
2148 out:
2149 FILE_UNUSE(fp, p);
2150 return (error);
2151 }
2152
2153 /*
2154 * Check access permissions.
2155 */
2156 int
2157 sys_access(l, v, retval)
2158 struct lwp *l;
2159 void *v;
2160 register_t *retval;
2161 {
2162 struct sys_access_args /* {
2163 syscallarg(const char *) path;
2164 syscallarg(int) flags;
2165 } */ *uap = v;
2166 struct proc *p = l->l_proc;
2167 struct ucred *cred;
2168 struct vnode *vp;
2169 int error, flags;
2170 struct nameidata nd;
2171
2172 cred = crdup(p->p_ucred);
2173 cred->cr_uid = p->p_cred->p_ruid;
2174 cred->cr_gid = p->p_cred->p_rgid;
2175 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
2176 SCARG(uap, path), p);
2177 /* Override default credentials */
2178 nd.ni_cnd.cn_cred = cred;
2179 if ((error = namei(&nd)) != 0)
2180 goto out;
2181 vp = nd.ni_vp;
2182
2183 /* Flags == 0 means only check for existence. */
2184 if (SCARG(uap, flags)) {
2185 flags = 0;
2186 if (SCARG(uap, flags) & R_OK)
2187 flags |= VREAD;
2188 if (SCARG(uap, flags) & W_OK)
2189 flags |= VWRITE;
2190 if (SCARG(uap, flags) & X_OK)
2191 flags |= VEXEC;
2192
2193 error = VOP_ACCESS(vp, flags, cred, p);
2194 if (!error && (flags & VWRITE))
2195 error = vn_writechk(vp);
2196 }
2197 vput(vp);
2198 out:
2199 crfree(cred);
2200 return (error);
2201 }
2202
2203 /*
2204 * Get file status; this version follows links.
2205 */
2206 /* ARGSUSED */
2207 int
2208 sys___stat13(l, v, retval)
2209 struct lwp *l;
2210 void *v;
2211 register_t *retval;
2212 {
2213 struct sys___stat13_args /* {
2214 syscallarg(const char *) path;
2215 syscallarg(struct stat *) ub;
2216 } */ *uap = v;
2217 struct proc *p = l->l_proc;
2218 struct stat sb;
2219 int error;
2220 struct nameidata nd;
2221
2222 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
2223 SCARG(uap, path), p);
2224 if ((error = namei(&nd)) != 0)
2225 return (error);
2226 error = vn_stat(nd.ni_vp, &sb, p);
2227 vput(nd.ni_vp);
2228 if (error)
2229 return (error);
2230 error = copyout(&sb, SCARG(uap, ub), sizeof(sb));
2231 return (error);
2232 }
2233
2234 /*
2235 * Get file status; this version does not follow links.
2236 */
2237 /* ARGSUSED */
2238 int
2239 sys___lstat13(l, v, retval)
2240 struct lwp *l;
2241 void *v;
2242 register_t *retval;
2243 {
2244 struct sys___lstat13_args /* {
2245 syscallarg(const char *) path;
2246 syscallarg(struct stat *) ub;
2247 } */ *uap = v;
2248 struct proc *p = l->l_proc;
2249 struct stat sb;
2250 int error;
2251 struct nameidata nd;
2252
2253 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
2254 SCARG(uap, path), p);
2255 if ((error = namei(&nd)) != 0)
2256 return (error);
2257 error = vn_stat(nd.ni_vp, &sb, p);
2258 vput(nd.ni_vp);
2259 if (error)
2260 return (error);
2261 error = copyout(&sb, SCARG(uap, ub), sizeof(sb));
2262 return (error);
2263 }
2264
2265 /*
2266 * Get configurable pathname variables.
2267 */
2268 /* ARGSUSED */
2269 int
2270 sys_pathconf(l, v, retval)
2271 struct lwp *l;
2272 void *v;
2273 register_t *retval;
2274 {
2275 struct sys_pathconf_args /* {
2276 syscallarg(const char *) path;
2277 syscallarg(int) name;
2278 } */ *uap = v;
2279 struct proc *p = l->l_proc;
2280 int error;
2281 struct nameidata nd;
2282
2283 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
2284 SCARG(uap, path), p);
2285 if ((error = namei(&nd)) != 0)
2286 return (error);
2287 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);
2288 vput(nd.ni_vp);
2289 return (error);
2290 }
2291
2292 /*
2293 * Return target name of a symbolic link.
2294 */
2295 /* ARGSUSED */
2296 int
2297 sys_readlink(l, v, retval)
2298 struct lwp *l;
2299 void *v;
2300 register_t *retval;
2301 {
2302 struct sys_readlink_args /* {
2303 syscallarg(const char *) path;
2304 syscallarg(char *) buf;
2305 syscallarg(size_t) count;
2306 } */ *uap = v;
2307 struct proc *p = l->l_proc;
2308 struct vnode *vp;
2309 struct iovec aiov;
2310 struct uio auio;
2311 int error;
2312 struct nameidata nd;
2313
2314 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
2315 SCARG(uap, path), p);
2316 if ((error = namei(&nd)) != 0)
2317 return (error);
2318 vp = nd.ni_vp;
2319 if (vp->v_type != VLNK)
2320 error = EINVAL;
2321 else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) ||
2322 (error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) == 0) {
2323 aiov.iov_base = SCARG(uap, buf);
2324 aiov.iov_len = SCARG(uap, count);
2325 auio.uio_iov = &aiov;
2326 auio.uio_iovcnt = 1;
2327 auio.uio_offset = 0;
2328 auio.uio_rw = UIO_READ;
2329 auio.uio_segflg = UIO_USERSPACE;
2330 auio.uio_procp = p;
2331 auio.uio_resid = SCARG(uap, count);
2332 error = VOP_READLINK(vp, &auio, p->p_ucred);
2333 }
2334 vput(vp);
2335 *retval = SCARG(uap, count) - auio.uio_resid;
2336 return (error);
2337 }
2338
2339 /*
2340 * Change flags of a file given a path name.
2341 */
2342 /* ARGSUSED */
2343 int
2344 sys_chflags(l, v, retval)
2345 struct lwp *l;
2346 void *v;
2347 register_t *retval;
2348 {
2349 struct sys_chflags_args /* {
2350 syscallarg(const char *) path;
2351 syscallarg(u_long) flags;
2352 } */ *uap = v;
2353 struct proc *p = l->l_proc;
2354 struct vnode *vp;
2355 int error;
2356 struct nameidata nd;
2357
2358 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2359 if ((error = namei(&nd)) != 0)
2360 return (error);
2361 vp = nd.ni_vp;
2362 error = change_flags(vp, SCARG(uap, flags), p);
2363 vput(vp);
2364 return (error);
2365 }
2366
2367 /*
2368 * Change flags of a file given a file descriptor.
2369 */
2370 /* ARGSUSED */
2371 int
2372 sys_fchflags(l, v, retval)
2373 struct lwp *l;
2374 void *v;
2375 register_t *retval;
2376 {
2377 struct sys_fchflags_args /* {
2378 syscallarg(int) fd;
2379 syscallarg(u_long) flags;
2380 } */ *uap = v;
2381 struct proc *p = l->l_proc;
2382 struct vnode *vp;
2383 struct file *fp;
2384 int error;
2385
2386 /* getvnode() will use the descriptor for us */
2387 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2388 return (error);
2389 vp = (struct vnode *)fp->f_data;
2390 error = change_flags(vp, SCARG(uap, flags), p);
2391 VOP_UNLOCK(vp, 0);
2392 FILE_UNUSE(fp, p);
2393 return (error);
2394 }
2395
2396 /*
2397 * Change flags of a file given a path name; this version does
2398 * not follow links.
2399 */
2400 int
2401 sys_lchflags(l, v, retval)
2402 struct lwp *l;
2403 void *v;
2404 register_t *retval;
2405 {
2406 struct sys_lchflags_args /* {
2407 syscallarg(const char *) path;
2408 syscallarg(u_long) flags;
2409 } */ *uap = v;
2410 struct proc *p = l->l_proc;
2411 struct vnode *vp;
2412 int error;
2413 struct nameidata nd;
2414
2415 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2416 if ((error = namei(&nd)) != 0)
2417 return (error);
2418 vp = nd.ni_vp;
2419 error = change_flags(vp, SCARG(uap, flags), p);
2420 vput(vp);
2421 return (error);
2422 }
2423
2424 /*
2425 * Common routine to change flags of a file.
2426 */
2427 int
2428 change_flags(vp, flags, p)
2429 struct vnode *vp;
2430 u_long flags;
2431 struct proc *p;
2432 {
2433 struct mount *mp;
2434 struct vattr vattr;
2435 int error;
2436
2437 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
2438 return (error);
2439 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
2440 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2441 /*
2442 * Non-superusers cannot change the flags on devices, even if they
2443 * own them.
2444 */
2445 if (suser(p->p_ucred, &p->p_acflag) != 0) {
2446 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
2447 goto out;
2448 if (vattr.va_type == VCHR || vattr.va_type == VBLK) {
2449 error = EINVAL;
2450 goto out;
2451 }
2452 }
2453 VATTR_NULL(&vattr);
2454 vattr.va_flags = flags;
2455 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
2456 out:
2457 vn_finished_write(mp, 0);
2458 return (error);
2459 }
2460
2461 /*
2462 * Change mode of a file given path name; this version follows links.
2463 */
2464 /* ARGSUSED */
2465 int
2466 sys_chmod(l, v, retval)
2467 struct lwp *l;
2468 void *v;
2469 register_t *retval;
2470 {
2471 struct sys_chmod_args /* {
2472 syscallarg(const char *) path;
2473 syscallarg(int) mode;
2474 } */ *uap = v;
2475 struct proc *p = l->l_proc;
2476 int error;
2477 struct nameidata nd;
2478
2479 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2480 if ((error = namei(&nd)) != 0)
2481 return (error);
2482
2483 error = change_mode(nd.ni_vp, SCARG(uap, mode), p);
2484
2485 vrele(nd.ni_vp);
2486 return (error);
2487 }
2488
2489 /*
2490 * Change mode of a file given a file descriptor.
2491 */
2492 /* ARGSUSED */
2493 int
2494 sys_fchmod(l, v, retval)
2495 struct lwp *l;
2496 void *v;
2497 register_t *retval;
2498 {
2499 struct sys_fchmod_args /* {
2500 syscallarg(int) fd;
2501 syscallarg(int) mode;
2502 } */ *uap = v;
2503 struct proc *p = l->l_proc;
2504 struct file *fp;
2505 int error;
2506
2507 /* getvnode() will use the descriptor for us */
2508 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2509 return (error);
2510
2511 error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), p);
2512 FILE_UNUSE(fp, p);
2513 return (error);
2514 }
2515
2516 /*
2517 * Change mode of a file given path name; this version does not follow links.
2518 */
2519 /* ARGSUSED */
2520 int
2521 sys_lchmod(l, v, retval)
2522 struct lwp *l;
2523 void *v;
2524 register_t *retval;
2525 {
2526 struct sys_lchmod_args /* {
2527 syscallarg(const char *) path;
2528 syscallarg(int) mode;
2529 } */ *uap = v;
2530 struct proc *p = l->l_proc;
2531 int error;
2532 struct nameidata nd;
2533
2534 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2535 if ((error = namei(&nd)) != 0)
2536 return (error);
2537
2538 error = change_mode(nd.ni_vp, SCARG(uap, mode), p);
2539
2540 vrele(nd.ni_vp);
2541 return (error);
2542 }
2543
2544 /*
2545 * Common routine to set mode given a vnode.
2546 */
2547 static int
2548 change_mode(vp, mode, p)
2549 struct vnode *vp;
2550 int mode;
2551 struct proc *p;
2552 {
2553 struct mount *mp;
2554 struct vattr vattr;
2555 int error;
2556
2557 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
2558 return (error);
2559 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
2560 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2561 VATTR_NULL(&vattr);
2562 vattr.va_mode = mode & ALLPERMS;
2563 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
2564 VOP_UNLOCK(vp, 0);
2565 vn_finished_write(mp, 0);
2566 return (error);
2567 }
2568
2569 /*
2570 * Set ownership given a path name; this version follows links.
2571 */
2572 /* ARGSUSED */
2573 int
2574 sys_chown(l, v, retval)
2575 struct lwp *l;
2576 void *v;
2577 register_t *retval;
2578 {
2579 struct sys_chown_args /* {
2580 syscallarg(const char *) path;
2581 syscallarg(uid_t) uid;
2582 syscallarg(gid_t) gid;
2583 } */ *uap = v;
2584 struct proc *p = l->l_proc;
2585 int error;
2586 struct nameidata nd;
2587
2588 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2589 if ((error = namei(&nd)) != 0)
2590 return (error);
2591
2592 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0);
2593
2594 vrele(nd.ni_vp);
2595 return (error);
2596 }
2597
2598 /*
2599 * Set ownership given a path name; this version follows links.
2600 * Provides POSIX semantics.
2601 */
2602 /* ARGSUSED */
2603 int
2604 sys___posix_chown(l, v, retval)
2605 struct lwp *l;
2606 void *v;
2607 register_t *retval;
2608 {
2609 struct sys_chown_args /* {
2610 syscallarg(const char *) path;
2611 syscallarg(uid_t) uid;
2612 syscallarg(gid_t) gid;
2613 } */ *uap = v;
2614 struct proc *p = l->l_proc;
2615 int error;
2616 struct nameidata nd;
2617
2618 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2619 if ((error = namei(&nd)) != 0)
2620 return (error);
2621
2622 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1);
2623
2624 vrele(nd.ni_vp);
2625 return (error);
2626 }
2627
2628 /*
2629 * Set ownership given a file descriptor.
2630 */
2631 /* ARGSUSED */
2632 int
2633 sys_fchown(l, v, retval)
2634 struct lwp *l;
2635 void *v;
2636 register_t *retval;
2637 {
2638 struct sys_fchown_args /* {
2639 syscallarg(int) fd;
2640 syscallarg(uid_t) uid;
2641 syscallarg(gid_t) gid;
2642 } */ *uap = v;
2643 struct proc *p = l->l_proc;
2644 int error;
2645 struct file *fp;
2646
2647 /* getvnode() will use the descriptor for us */
2648 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2649 return (error);
2650
2651 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid),
2652 SCARG(uap, gid), p, 0);
2653 FILE_UNUSE(fp, p);
2654 return (error);
2655 }
2656
2657 /*
2658 * Set ownership given a file descriptor, providing POSIX/XPG semantics.
2659 */
2660 /* ARGSUSED */
2661 int
2662 sys___posix_fchown(l, v, retval)
2663 struct lwp *l;
2664 void *v;
2665 register_t *retval;
2666 {
2667 struct sys_fchown_args /* {
2668 syscallarg(int) fd;
2669 syscallarg(uid_t) uid;
2670 syscallarg(gid_t) gid;
2671 } */ *uap = v;
2672 struct proc *p = l->l_proc;
2673 int error;
2674 struct file *fp;
2675
2676 /* getvnode() will use the descriptor for us */
2677 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2678 return (error);
2679
2680 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid),
2681 SCARG(uap, gid), p, 1);
2682 FILE_UNUSE(fp, p);
2683 return (error);
2684 }
2685
2686 /*
2687 * Set ownership given a path name; this version does not follow links.
2688 */
2689 /* ARGSUSED */
2690 int
2691 sys_lchown(l, v, retval)
2692 struct lwp *l;
2693 void *v;
2694 register_t *retval;
2695 {
2696 struct sys_lchown_args /* {
2697 syscallarg(const char *) path;
2698 syscallarg(uid_t) uid;
2699 syscallarg(gid_t) gid;
2700 } */ *uap = v;
2701 struct proc *p = l->l_proc;
2702 int error;
2703 struct nameidata nd;
2704
2705 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2706 if ((error = namei(&nd)) != 0)
2707 return (error);
2708
2709 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0);
2710
2711 vrele(nd.ni_vp);
2712 return (error);
2713 }
2714
2715 /*
2716 * Set ownership given a path name; this version does not follow links.
2717 * Provides POSIX/XPG semantics.
2718 */
2719 /* ARGSUSED */
2720 int
2721 sys___posix_lchown(l, v, retval)
2722 struct lwp *l;
2723 void *v;
2724 register_t *retval;
2725 {
2726 struct sys_lchown_args /* {
2727 syscallarg(const char *) path;
2728 syscallarg(uid_t) uid;
2729 syscallarg(gid_t) gid;
2730 } */ *uap = v;
2731 struct proc *p = l->l_proc;
2732 int error;
2733 struct nameidata nd;
2734
2735 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2736 if ((error = namei(&nd)) != 0)
2737 return (error);
2738
2739 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1);
2740
2741 vrele(nd.ni_vp);
2742 return (error);
2743 }
2744
2745 /*
2746 * Common routine to set ownership given a vnode.
2747 */
2748 static int
2749 change_owner(vp, uid, gid, p, posix_semantics)
2750 struct vnode *vp;
2751 uid_t uid;
2752 gid_t gid;
2753 struct proc *p;
2754 int posix_semantics;
2755 {
2756 struct mount *mp;
2757 struct vattr vattr;
2758 mode_t newmode;
2759 int error;
2760
2761 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
2762 return (error);
2763 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
2764 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2765 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
2766 goto out;
2767
2768 #define CHANGED(x) ((int)(x) != -1)
2769 newmode = vattr.va_mode;
2770 if (posix_semantics) {
2771 /*
2772 * POSIX/XPG semantics: if the caller is not the super-user,
2773 * clear set-user-id and set-group-id bits. Both POSIX and
2774 * the XPG consider the behaviour for calls by the super-user
2775 * implementation-defined; we leave the set-user-id and set-
2776 * group-id settings intact in that case.
2777 */
2778 if (suser(p->p_ucred, NULL) != 0)
2779 newmode &= ~(S_ISUID | S_ISGID);
2780 } else {
2781 /*
2782 * NetBSD semantics: when changing owner and/or group,
2783 * clear the respective bit(s).
2784 */
2785 if (CHANGED(uid))
2786 newmode &= ~S_ISUID;
2787 if (CHANGED(gid))
2788 newmode &= ~S_ISGID;
2789 }
2790 /* Update va_mode iff altered. */
2791 if (vattr.va_mode == newmode)
2792 newmode = VNOVAL;
2793
2794 VATTR_NULL(&vattr);
2795 vattr.va_uid = CHANGED(uid) ? uid : (uid_t)VNOVAL;
2796 vattr.va_gid = CHANGED(gid) ? gid : (gid_t)VNOVAL;
2797 vattr.va_mode = newmode;
2798 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
2799 #undef CHANGED
2800
2801 out:
2802 VOP_UNLOCK(vp, 0);
2803 vn_finished_write(mp, 0);
2804 return (error);
2805 }
2806
2807 /*
2808 * Set the access and modification times given a path name; this
2809 * version follows links.
2810 */
2811 /* ARGSUSED */
2812 int
2813 sys_utimes(l, v, retval)
2814 struct lwp *l;
2815 void *v;
2816 register_t *retval;
2817 {
2818 struct sys_utimes_args /* {
2819 syscallarg(const char *) path;
2820 syscallarg(const struct timeval *) tptr;
2821 } */ *uap = v;
2822 struct proc *p = l->l_proc;
2823 int error;
2824 struct nameidata nd;
2825
2826 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2827 if ((error = namei(&nd)) != 0)
2828 return (error);
2829
2830 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p);
2831
2832 vrele(nd.ni_vp);
2833 return (error);
2834 }
2835
2836 /*
2837 * Set the access and modification times given a file descriptor.
2838 */
2839 /* ARGSUSED */
2840 int
2841 sys_futimes(l, v, retval)
2842 struct lwp *l;
2843 void *v;
2844 register_t *retval;
2845 {
2846 struct sys_futimes_args /* {
2847 syscallarg(int) fd;
2848 syscallarg(const struct timeval *) tptr;
2849 } */ *uap = v;
2850 struct proc *p = l->l_proc;
2851 int error;
2852 struct file *fp;
2853
2854 /* getvnode() will use the descriptor for us */
2855 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2856 return (error);
2857
2858 error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), p);
2859 FILE_UNUSE(fp, p);
2860 return (error);
2861 }
2862
2863 /*
2864 * Set the access and modification times given a path name; this
2865 * version does not follow links.
2866 */
2867 /* ARGSUSED */
2868 int
2869 sys_lutimes(l, v, retval)
2870 struct lwp *l;
2871 void *v;
2872 register_t *retval;
2873 {
2874 struct sys_lutimes_args /* {
2875 syscallarg(const char *) path;
2876 syscallarg(const struct timeval *) tptr;
2877 } */ *uap = v;
2878 struct proc *p = l->l_proc;
2879 int error;
2880 struct nameidata nd;
2881
2882 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2883 if ((error = namei(&nd)) != 0)
2884 return (error);
2885
2886 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p);
2887
2888 vrele(nd.ni_vp);
2889 return (error);
2890 }
2891
2892 /*
2893 * Common routine to set access and modification times given a vnode.
2894 */
2895 static int
2896 change_utimes(vp, tptr, p)
2897 struct vnode *vp;
2898 const struct timeval *tptr;
2899 struct proc *p;
2900 {
2901 struct timeval tv[2];
2902 struct mount *mp;
2903 struct vattr vattr;
2904 int error;
2905
2906 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
2907 return (error);
2908 VATTR_NULL(&vattr);
2909 if (tptr == NULL) {
2910 microtime(&tv[0]);
2911 tv[1] = tv[0];
2912 vattr.va_vaflags |= VA_UTIMES_NULL;
2913 } else {
2914 error = copyin(tptr, tv, sizeof(tv));
2915 if (error)
2916 goto out;
2917 }
2918 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
2919 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2920 vattr.va_atime.tv_sec = tv[0].tv_sec;
2921 vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;
2922 vattr.va_mtime.tv_sec = tv[1].tv_sec;
2923 vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;
2924 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
2925 VOP_UNLOCK(vp, 0);
2926 out:
2927 vn_finished_write(mp, 0);
2928 return (error);
2929 }
2930
2931 /*
2932 * Truncate a file given its path name.
2933 */
2934 /* ARGSUSED */
2935 int
2936 sys_truncate(l, v, retval)
2937 struct lwp *l;
2938 void *v;
2939 register_t *retval;
2940 {
2941 struct sys_truncate_args /* {
2942 syscallarg(const char *) path;
2943 syscallarg(int) pad;
2944 syscallarg(off_t) length;
2945 } */ *uap = v;
2946 struct proc *p = l->l_proc;
2947 struct vnode *vp;
2948 struct mount *mp;
2949 struct vattr vattr;
2950 int error;
2951 struct nameidata nd;
2952
2953 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
2954 if ((error = namei(&nd)) != 0)
2955 return (error);
2956 vp = nd.ni_vp;
2957 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) {
2958 vrele(vp);
2959 return (error);
2960 }
2961 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
2962 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2963 if (vp->v_type == VDIR)
2964 error = EISDIR;
2965 else if ((error = vn_writechk(vp)) == 0 &&
2966 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {
2967 VATTR_NULL(&vattr);
2968 vattr.va_size = SCARG(uap, length);
2969 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
2970 }
2971 vput(vp);
2972 vn_finished_write(mp, 0);
2973 return (error);
2974 }
2975
2976 /*
2977 * Truncate a file given a file descriptor.
2978 */
2979 /* ARGSUSED */
2980 int
2981 sys_ftruncate(l, v, retval)
2982 struct lwp *l;
2983 void *v;
2984 register_t *retval;
2985 {
2986 struct sys_ftruncate_args /* {
2987 syscallarg(int) fd;
2988 syscallarg(int) pad;
2989 syscallarg(off_t) length;
2990 } */ *uap = v;
2991 struct proc *p = l->l_proc;
2992 struct mount *mp;
2993 struct vattr vattr;
2994 struct vnode *vp;
2995 struct file *fp;
2996 int error;
2997
2998 /* getvnode() will use the descriptor for us */
2999 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
3000 return (error);
3001 if ((fp->f_flag & FWRITE) == 0) {
3002 error = EINVAL;
3003 goto out;
3004 }
3005 vp = (struct vnode *)fp->f_data;
3006 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) {
3007 FILE_UNUSE(fp, p);
3008 return (error);
3009 }
3010 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
3011 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3012 if (vp->v_type == VDIR)
3013 error = EISDIR;
3014 else if ((error = vn_writechk(vp)) == 0) {
3015 VATTR_NULL(&vattr);
3016 vattr.va_size = SCARG(uap, length);
3017 error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
3018 }
3019 VOP_UNLOCK(vp, 0);
3020 vn_finished_write(mp, 0);
3021 out:
3022 FILE_UNUSE(fp, p);
3023 return (error);
3024 }
3025
3026 /*
3027 * Sync an open file.
3028 */
3029 /* ARGSUSED */
3030 int
3031 sys_fsync(l, v, retval)
3032 struct lwp *l;
3033 void *v;
3034 register_t *retval;
3035 {
3036 struct sys_fsync_args /* {
3037 syscallarg(int) fd;
3038 } */ *uap = v;
3039 struct proc *p = l->l_proc;
3040 struct vnode *vp;
3041 struct mount *mp;
3042 struct file *fp;
3043 int error;
3044
3045 /* getvnode() will use the descriptor for us */
3046 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
3047 return (error);
3048 vp = (struct vnode *)fp->f_data;
3049 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) {
3050 FILE_UNUSE(fp, p);
3051 return (error);
3052 }
3053 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3054 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, p);
3055 if (error == 0 && bioops.io_fsync != NULL &&
3056 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))
3057 (*bioops.io_fsync)(vp, 0);
3058 VOP_UNLOCK(vp, 0);
3059 vn_finished_write(mp, 0);
3060 FILE_UNUSE(fp, p);
3061 return (error);
3062 }
3063
3064 /*
3065 * Sync a range of file data. API modeled after that found in AIX.
3066 *
3067 * FDATASYNC indicates that we need only save enough metadata to be able
3068 * to re-read the written data. Note we duplicate AIX's requirement that
3069 * the file be open for writing.
3070 */
3071 /* ARGSUSED */
3072 int
3073 sys_fsync_range(l, v, retval)
3074 struct lwp *l;
3075 void *v;
3076 register_t *retval;
3077 {
3078 struct sys_fsync_range_args /* {
3079 syscallarg(int) fd;
3080 syscallarg(int) flags;
3081 syscallarg(off_t) start;
3082 syscallarg(int) length;
3083 } */ *uap = v;
3084 struct proc *p = l->l_proc;
3085 struct vnode *vp;
3086 struct file *fp;
3087 int flags, nflags;
3088 off_t s, e, len;
3089 int error;
3090
3091 /* getvnode() will use the descriptor for us */
3092 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
3093 return (error);
3094
3095 if ((fp->f_flag & FWRITE) == 0) {
3096 error = EBADF;
3097 goto out;
3098 }
3099
3100 flags = SCARG(uap, flags);
3101 if (((flags & (FDATASYNC | FFILESYNC)) == 0) ||
3102 ((~flags & (FDATASYNC | FFILESYNC)) == 0)) {
3103 error = EINVAL;
3104 goto out;
3105 }
3106 /* Now set up the flags for value(s) to pass to VOP_FSYNC() */
3107 if (flags & FDATASYNC)
3108 nflags = FSYNC_DATAONLY | FSYNC_WAIT;
3109 else
3110 nflags = FSYNC_WAIT;
3111 if (flags & FDISKSYNC)
3112 nflags |= FSYNC_CACHE;
3113
3114 len = SCARG(uap, length);
3115 /* If length == 0, we do the whole file, and s = l = 0 will do that */
3116 if (len) {
3117 s = SCARG(uap, start);
3118 e = s + len;
3119 if (e < s) {
3120 FILE_UNUSE(fp, p);
3121 error = EINVAL;
3122 goto out;
3123 }
3124 } else {
3125 e = 0;
3126 s = 0;
3127 }
3128
3129 vp = (struct vnode *)fp->f_data;
3130 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3131 error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, p);
3132
3133 if (error == 0 && bioops.io_fsync != NULL &&
3134 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))
3135 (*bioops.io_fsync)(vp, nflags);
3136
3137 VOP_UNLOCK(vp, 0);
3138 out:
3139 FILE_UNUSE(fp, p);
3140 return (error);
3141 }
3142
3143 /*
3144 * Sync the data of an open file.
3145 */
3146 /* ARGSUSED */
3147 int
3148 sys_fdatasync(l, v, retval)
3149 struct lwp *l;
3150 void *v;
3151 register_t *retval;
3152 {
3153 struct sys_fdatasync_args /* {
3154 syscallarg(int) fd;
3155 } */ *uap = v;
3156 struct proc *p = l->l_proc;
3157 struct vnode *vp;
3158 struct file *fp;
3159 int error;
3160
3161 /* getvnode() will use the descriptor for us */
3162 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
3163 return (error);
3164 if ((fp->f_flag & FWRITE) == 0) {
3165 FILE_UNUSE(fp, p);
3166 return (EBADF);
3167 }
3168 vp = (struct vnode *)fp->f_data;
3169 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3170 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, p);
3171 VOP_UNLOCK(vp, 0);
3172 FILE_UNUSE(fp, p);
3173 return (error);
3174 }
3175
3176 /*
3177 * Rename files, (standard) BSD semantics frontend.
3178 */
3179 /* ARGSUSED */
3180 int
3181 sys_rename(l, v, retval)
3182 struct lwp *l;
3183 void *v;
3184 register_t *retval;
3185 {
3186 struct sys_rename_args /* {
3187 syscallarg(const char *) from;
3188 syscallarg(const char *) to;
3189 } */ *uap = v;
3190 struct proc *p = l->l_proc;
3191
3192 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 0));
3193 }
3194
3195 /*
3196 * Rename files, POSIX semantics frontend.
3197 */
3198 /* ARGSUSED */
3199 int
3200 sys___posix_rename(l, v, retval)
3201 struct lwp *l;
3202 void *v;
3203 register_t *retval;
3204 {
3205 struct sys___posix_rename_args /* {
3206 syscallarg(const char *) from;
3207 syscallarg(const char *) to;
3208 } */ *uap = v;
3209 struct proc *p = l->l_proc;
3210
3211 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 1));
3212 }
3213
3214 /*
3215 * Rename files. Source and destination must either both be directories,
3216 * or both not be directories. If target is a directory, it must be empty.
3217 * If `from' and `to' refer to the same object, the value of the `retain'
3218 * argument is used to determine whether `from' will be
3219 *
3220 * (retain == 0) deleted unless `from' and `to' refer to the same
3221 * object in the file system's name space (BSD).
3222 * (retain == 1) always retained (POSIX).
3223 */
3224 static int
3225 rename_files(from, to, p, retain)
3226 const char *from, *to;
3227 struct proc *p;
3228 int retain;
3229 {
3230 struct mount *mp = NULL;
3231 struct vnode *tvp, *fvp, *tdvp;
3232 struct nameidata fromnd, tond;
3233 int error;
3234
3235 NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
3236 from, p);
3237 if ((error = namei(&fromnd)) != 0)
3238 return (error);
3239 fvp = fromnd.ni_vp;
3240 error = vn_start_write(fvp, &mp, V_WAIT | V_PCATCH);
3241 if (error != 0) {
3242 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
3243 vrele(fromnd.ni_dvp);
3244 vrele(fvp);
3245 if (fromnd.ni_startdir)
3246 vrele(fromnd.ni_startdir);
3247 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf);
3248 return (error);
3249 }
3250 NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART |
3251 (fvp->v_type == VDIR ? CREATEDIR : 0), UIO_USERSPACE, to, p);
3252 if ((error = namei(&tond)) != 0) {
3253 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
3254 vrele(fromnd.ni_dvp);
3255 vrele(fvp);
3256 goto out1;
3257 }
3258 tdvp = tond.ni_dvp;
3259 tvp = tond.ni_vp;
3260
3261 if (tvp != NULL) {
3262 if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
3263 error = ENOTDIR;
3264 goto out;
3265 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
3266 error = EISDIR;
3267 goto out;
3268 }
3269 }
3270
3271 if (fvp == tdvp)
3272 error = EINVAL;
3273
3274 /*
3275 * Source and destination refer to the same object.
3276 */
3277 if (fvp == tvp) {
3278 if (retain)
3279 error = -1;
3280 else if (fromnd.ni_dvp == tdvp &&
3281 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
3282 !memcmp(fromnd.ni_cnd.cn_nameptr,
3283 tond.ni_cnd.cn_nameptr,
3284 fromnd.ni_cnd.cn_namelen))
3285 error = -1;
3286 }
3287
3288 #ifdef VERIFIED_EXEC
3289 if (!error)
3290 error = veriexec_renamechk(fvp, tvp, fromnd.ni_dirp,
3291 tond.ni_dirp);
3292 #endif /* VERIFIED_EXEC */
3293
3294 out:
3295 if (!error) {
3296 VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);
3297 if (fromnd.ni_dvp != tdvp)
3298 VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
3299 if (tvp) {
3300 VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);
3301 }
3302 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
3303 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
3304 } else {
3305 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
3306 if (tdvp == tvp)
3307 vrele(tdvp);
3308 else
3309 vput(tdvp);
3310 if (tvp)
3311 vput(tvp);
3312 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
3313 vrele(fromnd.ni_dvp);
3314 vrele(fvp);
3315 }
3316 vrele(tond.ni_startdir);
3317 PNBUF_PUT(tond.ni_cnd.cn_pnbuf);
3318 out1:
3319 vn_finished_write(mp, 0);
3320 if (fromnd.ni_startdir)
3321 vrele(fromnd.ni_startdir);
3322 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf);
3323 return (error == -1 ? 0 : error);
3324 }
3325
3326 /*
3327 * Make a directory file.
3328 */
3329 /* ARGSUSED */
3330 int
3331 sys_mkdir(l, v, retval)
3332 struct lwp *l;
3333 void *v;
3334 register_t *retval;
3335 {
3336 struct sys_mkdir_args /* {
3337 syscallarg(const char *) path;
3338 syscallarg(int) mode;
3339 } */ *uap = v;
3340 struct proc *p = l->l_proc;
3341 struct mount *mp;
3342 struct vnode *vp;
3343 struct vattr vattr;
3344 int error;
3345 struct nameidata nd;
3346
3347 restart:
3348 NDINIT(&nd, CREATE, LOCKPARENT | CREATEDIR, UIO_USERSPACE,
3349 SCARG(uap, path), p);
3350 if ((error = namei(&nd)) != 0)
3351 return (error);
3352 vp = nd.ni_vp;
3353 if (vp != NULL) {
3354 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
3355 if (nd.ni_dvp == vp)
3356 vrele(nd.ni_dvp);
3357 else
3358 vput(nd.ni_dvp);
3359 vrele(vp);
3360 return (EEXIST);
3361 }
3362 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
3363 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
3364 if (nd.ni_dvp == vp)
3365 vrele(nd.ni_dvp);
3366 else
3367 vput(nd.ni_dvp);
3368 if ((error = vn_start_write(NULL, &mp,
3369 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
3370 return (error);
3371 goto restart;
3372 }
3373 VATTR_NULL(&vattr);
3374 vattr.va_type = VDIR;
3375 vattr.va_mode =
3376 (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask;
3377 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
3378 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
3379 if (!error)
3380 vput(nd.ni_vp);
3381 vn_finished_write(mp, 0);
3382 return (error);
3383 }
3384
3385 /*
3386 * Remove a directory file.
3387 */
3388 /* ARGSUSED */
3389 int
3390 sys_rmdir(l, v, retval)
3391 struct lwp *l;
3392 void *v;
3393 register_t *retval;
3394 {
3395 struct sys_rmdir_args /* {
3396 syscallarg(const char *) path;
3397 } */ *uap = v;
3398 struct proc *p = l->l_proc;
3399 struct mount *mp;
3400 struct vnode *vp;
3401 int error;
3402 struct nameidata nd;
3403
3404 restart:
3405 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
3406 SCARG(uap, path), p);
3407 if ((error = namei(&nd)) != 0)
3408 return (error);
3409 vp = nd.ni_vp;
3410 if (vp->v_type != VDIR) {
3411 error = ENOTDIR;
3412 goto out;
3413 }
3414 /*
3415 * No rmdir "." please.
3416 */
3417 if (nd.ni_dvp == vp) {
3418 error = EINVAL;
3419 goto out;
3420 }
3421 /*
3422 * The root of a mounted filesystem cannot be deleted.
3423 */
3424 if (vp->v_flag & VROOT) {
3425 error = EBUSY;
3426 goto out;
3427 }
3428 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) {
3429 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
3430 if (nd.ni_dvp == vp)
3431 vrele(nd.ni_dvp);
3432 else
3433 vput(nd.ni_dvp);
3434 vput(vp);
3435 if ((error = vn_start_write(NULL, &mp,
3436 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0)
3437 return (error);
3438 goto restart;
3439 }
3440 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
3441 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
3442 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
3443 vn_finished_write(mp, 0);
3444 return (error);
3445
3446 out:
3447 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
3448 if (nd.ni_dvp == vp)
3449 vrele(nd.ni_dvp);
3450 else
3451 vput(nd.ni_dvp);
3452 vput(vp);
3453 return (error);
3454 }
3455
3456 /*
3457 * Read a block of directory entries in a file system independent format.
3458 */
3459 int
3460 sys_getdents(l, v, retval)
3461 struct lwp *l;
3462 void *v;
3463 register_t *retval;
3464 {
3465 struct sys_getdents_args /* {
3466 syscallarg(int) fd;
3467 syscallarg(char *) buf;
3468 syscallarg(size_t) count;
3469 } */ *uap = v;
3470 struct proc *p = l->l_proc;
3471 struct file *fp;
3472 int error, done;
3473
3474 /* getvnode() will use the descriptor for us */
3475 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
3476 return (error);
3477 if ((fp->f_flag & FREAD) == 0) {
3478 error = EBADF;
3479 goto out;
3480 }
3481 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE,
3482 SCARG(uap, count), &done, p, 0, 0);
3483 #ifdef KTRACE
3484 if (!error && KTRPOINT(p, KTR_GENIO)) {
3485 struct iovec iov;
3486 iov.iov_base = SCARG(uap, buf);
3487 iov.iov_len = done;
3488 ktrgenio(p, SCARG(uap, fd), UIO_READ, &iov, done, 0);
3489 }
3490 #endif
3491 *retval = done;
3492 out:
3493 FILE_UNUSE(fp, p);
3494 return (error);
3495 }
3496
3497 /*
3498 * Set the mode mask for creation of filesystem nodes.
3499 */
3500 int
3501 sys_umask(l, v, retval)
3502 struct lwp *l;
3503 void *v;
3504 register_t *retval;
3505 {
3506 struct sys_umask_args /* {
3507 syscallarg(mode_t) newmask;
3508 } */ *uap = v;
3509 struct proc *p = l->l_proc;
3510 struct cwdinfo *cwdi;
3511
3512 cwdi = p->p_cwdi;
3513 *retval = cwdi->cwdi_cmask;
3514 cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS;
3515 return (0);
3516 }
3517
3518 /*
3519 * Void all references to file by ripping underlying filesystem
3520 * away from vnode.
3521 */
3522 /* ARGSUSED */
3523 int
3524 sys_revoke(l, v, retval)
3525 struct lwp *l;
3526 void *v;
3527 register_t *retval;
3528 {
3529 struct sys_revoke_args /* {
3530 syscallarg(const char *) path;
3531 } */ *uap = v;
3532 struct proc *p = l->l_proc;
3533 struct mount *mp;
3534 struct vnode *vp;
3535 struct vattr vattr;
3536 int error;
3537 struct nameidata nd;
3538
3539 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
3540 if ((error = namei(&nd)) != 0)
3541 return (error);
3542 vp = nd.ni_vp;
3543 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
3544 goto out;
3545 if (p->p_ucred->cr_uid != vattr.va_uid &&
3546 (error = suser(p->p_ucred, &p->p_acflag)) != 0)
3547 goto out;
3548 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0)
3549 goto out;
3550 if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER)))
3551 VOP_REVOKE(vp, REVOKEALL);
3552 vn_finished_write(mp, 0);
3553 out:
3554 vrele(vp);
3555 return (error);
3556 }
3557
3558 /*
3559 * Convert a user file descriptor to a kernel file entry.
3560 */
3561 int
3562 getvnode(fdp, fd, fpp)
3563 struct filedesc *fdp;
3564 int fd;
3565 struct file **fpp;
3566 {
3567 struct vnode *vp;
3568 struct file *fp;
3569
3570 if ((fp = fd_getfile(fdp, fd)) == NULL)
3571 return (EBADF);
3572
3573 FILE_USE(fp);
3574
3575 if (fp->f_type != DTYPE_VNODE) {
3576 FILE_UNUSE(fp, NULL);
3577 return (EINVAL);
3578 }
3579
3580 vp = (struct vnode *)fp->f_data;
3581 if (vp->v_type == VBAD) {
3582 FILE_UNUSE(fp, NULL);
3583 return (EBADF);
3584 }
3585
3586 *fpp = fp;
3587 return (0);
3588 }
3589
3590 /*
3591 * Push extended attribute configuration information into the VFS.
3592 *
3593 * NOTE: Not all file systems that support extended attributes will
3594 * require the use of this system call.
3595 */
3596 int
3597 sys_extattrctl(struct lwp *l, void *v, register_t *retval)
3598 {
3599 struct sys_extattrctl_args /* {
3600 syscallarg(const char *) path;
3601 syscallarg(int) cmd;
3602 syscallarg(const char *) filename;
3603 syscallarg(int) attrnamespace;
3604 syscallarg(const char *) attrname;
3605 } */ *uap = v;
3606 struct proc *p = l->l_proc;
3607 struct vnode *vp;
3608 struct nameidata nd;
3609 struct mount *mp;
3610 char attrname[EXTATTR_MAXNAMELEN];
3611 int error;
3612
3613 if (SCARG(uap, attrname) != NULL) {
3614 error = copyinstr(SCARG(uap, attrname), attrname,
3615 sizeof(attrname), NULL);
3616 if (error)
3617 return (error);
3618 }
3619
3620 vp = NULL;
3621 if (SCARG(uap, filename) != NULL) {
3622 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
3623 SCARG(uap, filename), p);
3624 error = namei(&nd);
3625 if (error)
3626 return (error);
3627 vp = nd.ni_vp;
3628 }
3629
3630 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
3631 error = namei(&nd);
3632 if (error) {
3633 if (vp != NULL)
3634 vput(vp);
3635 return (error);
3636 }
3637
3638 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH);
3639 if (error) {
3640 if (vp != NULL)
3641 vput(vp);
3642 return (error);
3643 }
3644
3645 error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp,
3646 SCARG(uap, attrnamespace),
3647 SCARG(uap, attrname) != NULL ? attrname : NULL, p);
3648
3649 vn_finished_write(mp, 0);
3650
3651 if (vp != NULL)
3652 vrele(vp);
3653
3654 return (error);
3655 }
3656
3657 /*
3658 * Set a named extended attribute on a file or directory.
3659 */
3660 static int
3661 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
3662 const void *data, size_t nbytes, struct proc *p, register_t *retval)
3663 {
3664 struct mount *mp;
3665 struct uio auio;
3666 struct iovec aiov;
3667 ssize_t cnt;
3668 int error;
3669
3670 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH);
3671 if (error)
3672 return (error);
3673 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
3674 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3675
3676 aiov.iov_base = (caddr_t) data; /* XXX kills const */
3677 aiov.iov_len = nbytes;
3678 auio.uio_iov = &aiov;
3679 auio.uio_iovcnt = 1;
3680 auio.uio_offset = 0;
3681 if (nbytes > INT_MAX) {
3682 error = EINVAL;
3683 goto done;
3684 }
3685 auio.uio_resid = nbytes;
3686 auio.uio_rw = UIO_WRITE;
3687 auio.uio_segflg = UIO_USERSPACE;
3688 auio.uio_procp = p;
3689 cnt = nbytes;
3690
3691 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
3692 p->p_ucred, p);
3693 cnt -= auio.uio_resid;
3694 retval[0] = cnt;
3695
3696 done:
3697 VOP_UNLOCK(vp, 0);
3698 vn_finished_write(mp, 0);
3699 return (error);
3700 }
3701
3702 int
3703 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval)
3704 {
3705 struct sys_extattr_set_fd_args /* {
3706 syscallarg(int) fd;
3707 syscallarg(int) attrnamespace;
3708 syscallarg(const char *) attrname;
3709 syscallarg(const void *) data;
3710 syscallarg(size_t) nbytes;
3711 } */ *uap = v;
3712 struct proc *p = l->l_proc;
3713 struct file *fp;
3714 struct vnode *vp;
3715 char attrname[EXTATTR_MAXNAMELEN];
3716 int error;
3717
3718 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3719 NULL);
3720 if (error)
3721 return (error);
3722
3723 error = getvnode(p->p_fd, SCARG(uap, fd), &fp);
3724 if (error)
3725 return (error);
3726 vp = (struct vnode *) fp->f_data;
3727
3728 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname,
3729 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
3730
3731 FILE_UNUSE(fp, p);
3732 return (error);
3733 }
3734
3735 int
3736 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval)
3737 {
3738 struct sys_extattr_set_file_args /* {
3739 syscallarg(const char *) path;
3740 syscallarg(int) attrnamespace;
3741 syscallarg(const char *) attrname;
3742 syscallarg(const void *) data;
3743 syscallarg(size_t) nbytes;
3744 } */ *uap = v;
3745 struct proc *p = l->l_proc;
3746 struct nameidata nd;
3747 char attrname[EXTATTR_MAXNAMELEN];
3748 int error;
3749
3750 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3751 NULL);
3752 if (error)
3753 return (error);
3754
3755 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
3756 error = namei(&nd);
3757 if (error)
3758 return (error);
3759
3760 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
3761 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
3762
3763 vrele(nd.ni_vp);
3764 return (error);
3765 }
3766
3767 int
3768 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval)
3769 {
3770 struct sys_extattr_set_link_args /* {
3771 syscallarg(const char *) path;
3772 syscallarg(int) attrnamespace;
3773 syscallarg(const char *) attrname;
3774 syscallarg(const void *) data;
3775 syscallarg(size_t) nbytes;
3776 } */ *uap = v;
3777 struct proc *p = l->l_proc;
3778 struct nameidata nd;
3779 char attrname[EXTATTR_MAXNAMELEN];
3780 int error;
3781
3782 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3783 NULL);
3784 if (error)
3785 return (error);
3786
3787 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
3788 error = namei(&nd);
3789 if (error)
3790 return (error);
3791
3792 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
3793 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
3794
3795 vrele(nd.ni_vp);
3796 return (error);
3797 }
3798
3799 /*
3800 * Get a named extended attribute on a file or directory.
3801 */
3802 static int
3803 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
3804 void *data, size_t nbytes, struct proc *p, register_t *retval)
3805 {
3806 struct uio auio, *auiop;
3807 struct iovec aiov;
3808 ssize_t cnt;
3809 size_t size, *sizep;
3810 int error;
3811
3812 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ);
3813 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3814
3815 /*
3816 * Slightly unusual semantics: if the user provides a NULL data
3817 * pointer, they don't want to receive the data, just the maximum
3818 * read length.
3819 */
3820 auiop = NULL;
3821 sizep = NULL;
3822 cnt = 0;
3823 if (data != NULL) {
3824 aiov.iov_base = data;
3825 aiov.iov_len = nbytes;
3826 auio.uio_iov = &aiov;
3827 auio.uio_offset = 0;
3828 if (nbytes > INT_MAX) {
3829 error = EINVAL;
3830 goto done;
3831 }
3832 auio.uio_resid = nbytes;
3833 auio.uio_rw = UIO_READ;
3834 auio.uio_segflg = UIO_USERSPACE;
3835 auio.uio_procp = p;
3836 auiop = &auio;
3837 cnt = nbytes;
3838 } else
3839 sizep = &size;
3840
3841 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
3842 p->p_ucred, p);
3843
3844 if (auiop != NULL) {
3845 cnt -= auio.uio_resid;
3846 retval[0] = cnt;
3847 } else
3848 retval[0] = size;
3849
3850 done:
3851 VOP_UNLOCK(vp, 0);
3852 return (error);
3853 }
3854
3855 int
3856 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval)
3857 {
3858 struct sys_extattr_get_fd_args /* {
3859 syscallarg(int) fd;
3860 syscallarg(int) attrnamespace;
3861 syscallarg(const char *) attrname;
3862 syscallarg(void *) data;
3863 syscallarg(size_t) nbytes;
3864 } */ *uap = v;
3865 struct proc *p = l->l_proc;
3866 struct file *fp;
3867 struct vnode *vp;
3868 char attrname[EXTATTR_MAXNAMELEN];
3869 int error;
3870
3871 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3872 NULL);
3873 if (error)
3874 return (error);
3875
3876 error = getvnode(p->p_fd, SCARG(uap, fd), &fp);
3877 if (error)
3878 return (error);
3879 vp = (struct vnode *) fp->f_data;
3880
3881 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname,
3882 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
3883
3884 FILE_UNUSE(fp, p);
3885 return (error);
3886 }
3887
3888 int
3889 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval)
3890 {
3891 struct sys_extattr_get_file_args /* {
3892 syscallarg(const char *) path;
3893 syscallarg(int) attrnamespace;
3894 syscallarg(const char *) attrname;
3895 syscallarg(void *) data;
3896 syscallarg(size_t) nbytes;
3897 } */ *uap = v;
3898 struct proc *p = l->l_proc;
3899 struct nameidata nd;
3900 char attrname[EXTATTR_MAXNAMELEN];
3901 int error;
3902
3903 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3904 NULL);
3905 if (error)
3906 return (error);
3907
3908 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
3909 error = namei(&nd);
3910 if (error)
3911 return (error);
3912
3913 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
3914 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
3915
3916 vrele(nd.ni_vp);
3917 return (error);
3918 }
3919
3920 int
3921 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval)
3922 {
3923 struct sys_extattr_get_link_args /* {
3924 syscallarg(const char *) path;
3925 syscallarg(int) attrnamespace;
3926 syscallarg(const char *) attrname;
3927 syscallarg(void *) data;
3928 syscallarg(size_t) nbytes;
3929 } */ *uap = v;
3930 struct proc *p = l->l_proc;
3931 struct nameidata nd;
3932 char attrname[EXTATTR_MAXNAMELEN];
3933 int error;
3934
3935 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3936 NULL);
3937 if (error)
3938 return (error);
3939
3940 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
3941 error = namei(&nd);
3942 if (error)
3943 return (error);
3944
3945 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
3946 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
3947
3948 vrele(nd.ni_vp);
3949 return (error);
3950 }
3951
3952 /*
3953 * Delete a named extended attribute on a file or directory.
3954 */
3955 static int
3956 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,
3957 struct proc *p)
3958 {
3959 struct mount *mp;
3960 int error;
3961
3962 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH);
3963 if (error)
3964 return (error);
3965 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
3966 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
3967
3968 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, p->p_ucred, p);
3969 if (error == EOPNOTSUPP)
3970 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
3971 p->p_ucred, p);
3972
3973 VOP_UNLOCK(vp, 0);
3974 vn_finished_write(mp, 0);
3975 return (error);
3976 }
3977
3978 int
3979 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval)
3980 {
3981 struct sys_extattr_delete_fd_args /* {
3982 syscallarg(int) fd;
3983 syscallarg(int) attrnamespace;
3984 syscallarg(const char *) attrname;
3985 } */ *uap = v;
3986 struct proc *p = l->l_proc;
3987 struct file *fp;
3988 struct vnode *vp;
3989 char attrname[EXTATTR_MAXNAMELEN];
3990 int error;
3991
3992 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
3993 NULL);
3994 if (error)
3995 return (error);
3996
3997 error = getvnode(p->p_fd, SCARG(uap, fd), &fp);
3998 if (error)
3999 return (error);
4000 vp = (struct vnode *) fp->f_data;
4001
4002 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, p);
4003
4004 FILE_UNUSE(fp, p);
4005 return (error);
4006 }
4007
4008 int
4009 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval)
4010 {
4011 struct sys_extattr_delete_file_args /* {
4012 syscallarg(const char *) path;
4013 syscallarg(int) attrnamespace;
4014 syscallarg(const char *) attrname;
4015 } */ *uap = v;
4016 struct proc *p = l->l_proc;
4017 struct nameidata nd;
4018 char attrname[EXTATTR_MAXNAMELEN];
4019 int error;
4020
4021 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
4022 NULL);
4023 if (error)
4024 return (error);
4025
4026 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
4027 error = namei(&nd);
4028 if (error)
4029 return (error);
4030
4031 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
4032 p);
4033
4034 vrele(nd.ni_vp);
4035 return (error);
4036 }
4037
4038 int
4039 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval)
4040 {
4041 struct sys_extattr_delete_link_args /* {
4042 syscallarg(const char *) path;
4043 syscallarg(int) attrnamespace;
4044 syscallarg(const char *) attrname;
4045 } */ *uap = v;
4046 struct proc *p = l->l_proc;
4047 struct nameidata nd;
4048 char attrname[EXTATTR_MAXNAMELEN];
4049 int error;
4050
4051 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
4052 NULL);
4053 if (error)
4054 return (error);
4055
4056 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
4057 error = namei(&nd);
4058 if (error)
4059 return (error);
4060
4061 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
4062 p);
4063
4064 vrele(nd.ni_vp);
4065 return (error);
4066 }
4067
4068 /*
4069 * Retrieve a list of extended attributes on a file or directory.
4070 */
4071 static int
4072 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes,
4073 struct proc *p, register_t *retval)
4074 {
4075 struct uio auio, *auiop;
4076 size_t size, *sizep;
4077 struct iovec aiov;
4078 ssize_t cnt;
4079 int error;
4080
4081 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ);
4082 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
4083
4084 auiop = NULL;
4085 sizep = NULL;
4086 cnt = 0;
4087 if (data != NULL) {
4088 aiov.iov_base = data;
4089 aiov.iov_len = nbytes;
4090 auio.uio_iov = &aiov;
4091 auio.uio_offset = 0;
4092 if (nbytes > INT_MAX) {
4093 error = EINVAL;
4094 goto done;
4095 }
4096 auio.uio_resid = nbytes;
4097 auio.uio_rw = UIO_READ;
4098 auio.uio_segflg = UIO_USERSPACE;
4099 auio.uio_procp = p;
4100 auiop = &auio;
4101 cnt = nbytes;
4102 } else
4103 sizep = &size;
4104
4105 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
4106 p->p_ucred, p);
4107
4108 if (auiop != NULL) {
4109 cnt -= auio.uio_resid;
4110 retval[0] = cnt;
4111 } else
4112 retval[0] = size;
4113
4114 done:
4115 VOP_UNLOCK(vp, 0);
4116 return (error);
4117 }
4118
4119 int
4120 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval)
4121 {
4122 struct sys_extattr_list_fd_args /* {
4123 syscallarg(int) fd;
4124 syscallarg(int) attrnamespace;
4125 syscallarg(void *) data;
4126 syscallarg(size_t) nbytes;
4127 } */ *uap = v;
4128 struct proc *p = l->l_proc;
4129 struct file *fp;
4130 struct vnode *vp;
4131 int error;
4132
4133 error = getvnode(p->p_fd, SCARG(uap, fd), &fp);
4134 if (error)
4135 return (error);
4136 vp = (struct vnode *) fp->f_data;
4137
4138 error = extattr_list_vp(vp, SCARG(uap, attrnamespace),
4139 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
4140
4141 FILE_UNUSE(fp, p);
4142 return (error);
4143 }
4144
4145 int
4146 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval)
4147 {
4148 struct sys_extattr_list_file_args /* {
4149 syscallarg(const char *) path;
4150 syscallarg(int) attrnamespace;
4151 syscallarg(void *) data;
4152 syscallarg(size_t) nbytes;
4153 } */ *uap = v;
4154 struct proc *p = l->l_proc;
4155 struct nameidata nd;
4156 int error;
4157
4158 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
4159 error = namei(&nd);
4160 if (error)
4161 return (error);
4162
4163 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace),
4164 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
4165
4166 vrele(nd.ni_vp);
4167 return (error);
4168 }
4169
4170 int
4171 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval)
4172 {
4173 struct sys_extattr_list_link_args /* {
4174 syscallarg(const char *) path;
4175 syscallarg(int) attrnamespace;
4176 syscallarg(void *) data;
4177 syscallarg(size_t) nbytes;
4178 } */ *uap = v;
4179 struct proc *p = l->l_proc;
4180 struct nameidata nd;
4181 int error;
4182
4183 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
4184 error = namei(&nd);
4185 if (error)
4186 return (error);
4187
4188 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace),
4189 SCARG(uap, data), SCARG(uap, nbytes), p, retval);
4190
4191 vrele(nd.ni_vp);
4192 return (error);
4193 }
Cache object: e54e90d7f9abaf6e648da8020a4f4b58
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