Split execve(). This required some interesting changes to the shell
[dragonfly.git] / sys / kern / vfs_syscalls.c
CommitLineData
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1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
39 * $FreeBSD: src/sys/kern/vfs_syscalls.c,v 1.151.2.18 2003/04/04 20:35:58 tegge Exp $
b651c485 40 * $DragonFly: src/sys/kern/vfs_syscalls.c,v 1.25 2003/11/11 14:33:23 daver Exp $
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41 */
42
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43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/buf.h>
46#include <sys/sysent.h>
47#include <sys/malloc.h>
48#include <sys/mount.h>
49#include <sys/sysproto.h>
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50#include <sys/filedesc.h>
51#include <sys/kernel.h>
52#include <sys/fcntl.h>
53#include <sys/file.h>
54#include <sys/linker.h>
55#include <sys/stat.h>
56#include <sys/unistd.h>
57#include <sys/vnode.h>
58#include <sys/proc.h>
dadab5e9 59#include <sys/namei.h>
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60#include <sys/dirent.h>
61#include <sys/extattr.h>
8f6f8622 62#include <sys/kern_syscall.h>
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63
64#include <machine/limits.h>
1f2de5d4 65#include <vfs/union/union.h>
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66#include <sys/sysctl.h>
67#include <vm/vm.h>
68#include <vm/vm_object.h>
69#include <vm/vm_zone.h>
70#include <vm/vm_page.h>
71
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72#include <sys/file2.h>
73
402ed7e1
RG
74static int change_dir (struct nameidata *ndp, struct thread *td);
75static void checkdirs (struct vnode *olddp);
76static int chroot_refuse_vdir_fds (struct filedesc *fdp);
77static int getutimes (const struct timeval *, struct timespec *);
78static int setfown (struct vnode *, uid_t, gid_t);
79static int setfmode (struct vnode *, int);
80static int setfflags (struct vnode *, int);
81static int setutimes (struct vnode *, const struct timespec *, int);
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82static int usermount = 0; /* if 1, non-root can mount fs. */
83
402ed7e1 84int (*union_dircheckp) (struct thread *, struct vnode **, struct file *);
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85
86SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
87
88/*
89 * Virtual File System System Calls
90 */
91
92/*
93 * Mount a file system.
94 */
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95/*
96 * mount_args(char *type, char *path, int flags, caddr_t data)
97 */
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98/* ARGSUSED */
99int
41c20dac 100mount(struct mount_args *uap)
984263bc 101{
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102 struct thread *td = curthread;
103 struct proc *p = td->td_proc;
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104 struct vnode *vp;
105 struct mount *mp;
106 struct vfsconf *vfsp;
107 int error, flag = 0, flag2 = 0;
108 struct vattr va;
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109 struct nameidata nd;
110 char fstypename[MFSNAMELEN];
111
dadab5e9 112 if (usermount == 0 && (error = suser(td)))
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113 return (error);
114 /*
115 * Do not allow NFS export by non-root users.
116 */
117 if (SCARG(uap, flags) & MNT_EXPORTED) {
dadab5e9 118 error = suser(td);
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119 if (error)
120 return (error);
121 }
122 /*
123 * Silently enforce MNT_NOSUID and MNT_NODEV for non-root users
124 */
dadab5e9 125 if (suser(td))
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126 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
127 /*
128 * Get vnode to be covered
129 */
2b69e610 130 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
dadab5e9 131 SCARG(uap, path), td);
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132 if ((error = namei(&nd)) != 0)
133 return (error);
134 NDFREE(&nd, NDF_ONLY_PNBUF);
135 vp = nd.ni_vp;
136 if (SCARG(uap, flags) & MNT_UPDATE) {
137 if ((vp->v_flag & VROOT) == 0) {
138 vput(vp);
139 return (EINVAL);
140 }
141 mp = vp->v_mount;
142 flag = mp->mnt_flag;
143 flag2 = mp->mnt_kern_flag;
144 /*
145 * We only allow the filesystem to be reloaded if it
146 * is currently mounted read-only.
147 */
148 if ((SCARG(uap, flags) & MNT_RELOAD) &&
149 ((mp->mnt_flag & MNT_RDONLY) == 0)) {
150 vput(vp);
151 return (EOPNOTSUPP); /* Needs translation */
152 }
153 /*
154 * Only root, or the user that did the original mount is
155 * permitted to update it.
156 */
157 if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
dadab5e9 158 (error = suser(td))) {
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159 vput(vp);
160 return (error);
161 }
dadab5e9 162 if (vfs_busy(mp, LK_NOWAIT, 0, td)) {
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163 vput(vp);
164 return (EBUSY);
165 }
8a8d5d85 166 lwkt_gettoken(&vp->v_interlock);
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167 if ((vp->v_flag & VMOUNT) != 0 ||
168 vp->v_mountedhere != NULL) {
8a8d5d85 169 lwkt_reltoken(&vp->v_interlock);
dadab5e9 170 vfs_unbusy(mp, td);
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171 vput(vp);
172 return (EBUSY);
173 }
174 vp->v_flag |= VMOUNT;
8a8d5d85 175 lwkt_reltoken(&vp->v_interlock);
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176 mp->mnt_flag |=
177 SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
dadab5e9 178 VOP_UNLOCK(vp, 0, td);
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179 goto update;
180 }
181 /*
182 * If the user is not root, ensure that they own the directory
183 * onto which we are attempting to mount.
184 */
3b568787 185 if ((error = VOP_GETATTR(vp, &va, td)) ||
984263bc 186 (va.va_uid != p->p_ucred->cr_uid &&
dadab5e9 187 (error = suser(td)))) {
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188 vput(vp);
189 return (error);
190 }
3b568787 191 if ((error = vinvalbuf(vp, V_SAVE, td, 0, 0)) != 0) {
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192 vput(vp);
193 return (error);
194 }
195 if (vp->v_type != VDIR) {
196 vput(vp);
197 return (ENOTDIR);
198 }
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199 if ((error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL)) != 0) {
200 vput(vp);
201 return (error);
202 }
203 for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
204 if (!strcmp(vfsp->vfc_name, fstypename))
205 break;
206 if (vfsp == NULL) {
207 linker_file_t lf;
208
209 /* Only load modules for root (very important!) */
dadab5e9 210 if ((error = suser(td)) != 0) {
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211 vput(vp);
212 return error;
213 }
214 error = linker_load_file(fstypename, &lf);
215 if (error || lf == NULL) {
216 vput(vp);
217 if (lf == NULL)
218 error = ENODEV;
219 return error;
220 }
221 lf->userrefs++;
222 /* lookup again, see if the VFS was loaded */
223 for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
224 if (!strcmp(vfsp->vfc_name, fstypename))
225 break;
226 if (vfsp == NULL) {
227 lf->userrefs--;
228 linker_file_unload(lf);
229 vput(vp);
230 return (ENODEV);
231 }
232 }
8a8d5d85 233 lwkt_gettoken(&vp->v_interlock);
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234 if ((vp->v_flag & VMOUNT) != 0 ||
235 vp->v_mountedhere != NULL) {
8a8d5d85 236 lwkt_reltoken(&vp->v_interlock);
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237 vput(vp);
238 return (EBUSY);
239 }
240 vp->v_flag |= VMOUNT;
8a8d5d85 241 lwkt_reltoken(&vp->v_interlock);
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242
243 /*
244 * Allocate and initialize the filesystem.
245 */
246 mp = malloc(sizeof(struct mount), M_MOUNT, M_WAITOK);
247 bzero((char *)mp, (u_long)sizeof(struct mount));
248 TAILQ_INIT(&mp->mnt_nvnodelist);
249 TAILQ_INIT(&mp->mnt_reservedvnlist);
250 mp->mnt_nvnodelistsize = 0;
377d4740 251 lockinit(&mp->mnt_lock, 0, "vfslock", 0, LK_NOPAUSE);
dadab5e9 252 (void)vfs_busy(mp, LK_NOWAIT, 0, td);
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253 mp->mnt_op = vfsp->vfc_vfsops;
254 mp->mnt_vfc = vfsp;
255 vfsp->vfc_refcount++;
256 mp->mnt_stat.f_type = vfsp->vfc_typenum;
257 mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
258 strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);
259 mp->mnt_vnodecovered = vp;
260 mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
261 mp->mnt_iosize_max = DFLTPHYS;
dadab5e9 262 VOP_UNLOCK(vp, 0, td);
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263update:
264 /*
265 * Set the mount level flags.
266 */
267 if (SCARG(uap, flags) & MNT_RDONLY)
268 mp->mnt_flag |= MNT_RDONLY;
269 else if (mp->mnt_flag & MNT_RDONLY)
270 mp->mnt_kern_flag |= MNTK_WANTRDWR;
271 mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
272 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
273 MNT_NOSYMFOLLOW | MNT_IGNORE |
274 MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
275 mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
276 MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE |
277 MNT_NOSYMFOLLOW | MNT_IGNORE |
278 MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
279 /*
280 * Mount the filesystem.
281 * XXX The final recipients of VFS_MOUNT just overwrite the ndp they
282 * get. No freeing of cn_pnbuf.
283 */
dadab5e9 284 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, td);
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285 if (mp->mnt_flag & MNT_UPDATE) {
286 if (mp->mnt_kern_flag & MNTK_WANTRDWR)
287 mp->mnt_flag &= ~MNT_RDONLY;
288 mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
289 mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
290 if (error) {
291 mp->mnt_flag = flag;
292 mp->mnt_kern_flag = flag2;
293 }
294 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
295 if (mp->mnt_syncer == NULL)
296 error = vfs_allocate_syncvnode(mp);
297 } else {
298 if (mp->mnt_syncer != NULL)
299 vrele(mp->mnt_syncer);
300 mp->mnt_syncer = NULL;
301 }
dadab5e9 302 vfs_unbusy(mp, td);
8a8d5d85 303 lwkt_gettoken(&vp->v_interlock);
984263bc 304 vp->v_flag &= ~VMOUNT;
8a8d5d85 305 lwkt_reltoken(&vp->v_interlock);
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306 vrele(vp);
307 return (error);
308 }
dadab5e9 309 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
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310 /*
311 * Put the new filesystem on the mount list after root.
312 */
313 cache_purge(vp);
314 if (!error) {
8a8d5d85 315 lwkt_gettoken(&vp->v_interlock);
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316 vp->v_flag &= ~VMOUNT;
317 vp->v_mountedhere = mp;
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318 lwkt_reltoken(&vp->v_interlock);
319 lwkt_gettoken(&mountlist_token);
984263bc 320 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
8a8d5d85 321 lwkt_reltoken(&mountlist_token);
984263bc 322 checkdirs(vp);
dadab5e9 323 VOP_UNLOCK(vp, 0, td);
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324 if ((mp->mnt_flag & MNT_RDONLY) == 0)
325 error = vfs_allocate_syncvnode(mp);
dadab5e9
MD
326 vfs_unbusy(mp, td);
327 if ((error = VFS_START(mp, 0, td)) != 0)
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328 vrele(vp);
329 } else {
8a8d5d85 330 lwkt_gettoken(&vp->v_interlock);
984263bc 331 vp->v_flag &= ~VMOUNT;
8a8d5d85 332 lwkt_reltoken(&vp->v_interlock);
984263bc 333 mp->mnt_vfc->vfc_refcount--;
dadab5e9 334 vfs_unbusy(mp, td);
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335 free((caddr_t)mp, M_MOUNT);
336 vput(vp);
337 }
338 return (error);
339}
340
341/*
342 * Scan all active processes to see if any of them have a current
343 * or root directory onto which the new filesystem has just been
344 * mounted. If so, replace them with the new mount point.
345 */
346static void
dadab5e9 347checkdirs(struct vnode *olddp)
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348{
349 struct filedesc *fdp;
350 struct vnode *newdp;
351 struct proc *p;
352
353 if (olddp->v_usecount == 1)
354 return;
355 if (VFS_ROOT(olddp->v_mountedhere, &newdp))
356 panic("mount: lost mount");
f62004ad 357 FOREACH_PROC_IN_SYSTEM(p) {
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358 fdp = p->p_fd;
359 if (fdp->fd_cdir == olddp) {
360 vrele(fdp->fd_cdir);
361 VREF(newdp);
362 fdp->fd_cdir = newdp;
363 }
364 if (fdp->fd_rdir == olddp) {
365 vrele(fdp->fd_rdir);
366 VREF(newdp);
367 fdp->fd_rdir = newdp;
368 }
369 }
370 if (rootvnode == olddp) {
371 vrele(rootvnode);
372 VREF(newdp);
373 rootvnode = newdp;
7ea21ed1 374 vfs_cache_setroot(rootvnode);
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375 }
376 vput(newdp);
377}
378
379/*
380 * Unmount a file system.
381 *
382 * Note: unmount takes a path to the vnode mounted on as argument,
383 * not special file (as before).
384 */
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385/*
386 * umount_args(char *path, int flags)
387 */
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388/* ARGSUSED */
389int
41c20dac 390unmount(struct unmount_args *uap)
984263bc 391{
dadab5e9
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392 struct thread *td = curthread;
393 struct proc *p = td->td_proc;
41c20dac 394 struct vnode *vp;
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395 struct mount *mp;
396 int error;
397 struct nameidata nd;
398
dadab5e9 399 KKASSERT(p);
2b69e610 400 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
dadab5e9 401 SCARG(uap, path), td);
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402 if ((error = namei(&nd)) != 0)
403 return (error);
404 vp = nd.ni_vp;
405 NDFREE(&nd, NDF_ONLY_PNBUF);
406 mp = vp->v_mount;
407
408 /*
409 * Only root, or the user that did the original mount is
410 * permitted to unmount this filesystem.
411 */
412 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
dadab5e9 413 (error = suser(td))) {
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414 vput(vp);
415 return (error);
416 }
417
418 /*
419 * Don't allow unmounting the root file system.
420 */
421 if (mp->mnt_flag & MNT_ROOTFS) {
422 vput(vp);
423 return (EINVAL);
424 }
425
426 /*
427 * Must be the root of the filesystem
428 */
429 if ((vp->v_flag & VROOT) == 0) {
430 vput(vp);
431 return (EINVAL);
432 }
433 vput(vp);
dadab5e9 434 return (dounmount(mp, SCARG(uap, flags), td));
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435}
436
437/*
438 * Do the actual file system unmount.
439 */
440int
dadab5e9 441dounmount(struct mount *mp, int flags, struct thread *td)
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442{
443 struct vnode *coveredvp;
444 int error;
445 int async_flag;
446
8a8d5d85 447 lwkt_gettoken(&mountlist_token);
984263bc 448 if (mp->mnt_kern_flag & MNTK_UNMOUNT) {
8a8d5d85 449 lwkt_reltoken(&mountlist_token);
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450 return (EBUSY);
451 }
452 mp->mnt_kern_flag |= MNTK_UNMOUNT;
453 /* Allow filesystems to detect that a forced unmount is in progress. */
454 if (flags & MNT_FORCE)
455 mp->mnt_kern_flag |= MNTK_UNMOUNTF;
456 error = lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK |
8a8d5d85 457 ((flags & MNT_FORCE) ? 0 : LK_NOWAIT), &mountlist_token, td);
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458 if (error) {
459 mp->mnt_kern_flag &= ~(MNTK_UNMOUNT | MNTK_UNMOUNTF);
460 if (mp->mnt_kern_flag & MNTK_MWAIT)
461 wakeup((caddr_t)mp);
462 return (error);
463 }
464
465 if (mp->mnt_flag & MNT_EXPUBLIC)
466 vfs_setpublicfs(NULL, NULL, NULL);
467
468 vfs_msync(mp, MNT_WAIT);
469 async_flag = mp->mnt_flag & MNT_ASYNC;
470 mp->mnt_flag &=~ MNT_ASYNC;
471 cache_purgevfs(mp); /* remove cache entries for this file sys */
472 if (mp->mnt_syncer != NULL)
473 vrele(mp->mnt_syncer);
474 if (((mp->mnt_flag & MNT_RDONLY) ||
3b568787 475 (error = VFS_SYNC(mp, MNT_WAIT, td)) == 0) ||
984263bc 476 (flags & MNT_FORCE))
dadab5e9 477 error = VFS_UNMOUNT(mp, flags, td);
8a8d5d85 478 lwkt_gettoken(&mountlist_token);
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479 if (error) {
480 if ((mp->mnt_flag & MNT_RDONLY) == 0 && mp->mnt_syncer == NULL)
481 (void) vfs_allocate_syncvnode(mp);
482 mp->mnt_kern_flag &= ~(MNTK_UNMOUNT | MNTK_UNMOUNTF);
483 mp->mnt_flag |= async_flag;
484 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
8a8d5d85 485 &mountlist_token, td);
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486 if (mp->mnt_kern_flag & MNTK_MWAIT)
487 wakeup((caddr_t)mp);
488 return (error);
489 }
490 TAILQ_REMOVE(&mountlist, mp, mnt_list);
491 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
7ea21ed1 492 coveredvp->v_mountedhere = NULL;
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493 vrele(coveredvp);
494 }
495 mp->mnt_vfc->vfc_refcount--;
496 if (!TAILQ_EMPTY(&mp->mnt_nvnodelist))
497 panic("unmount: dangling vnode");
8a8d5d85 498 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_token, td);
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499 if (mp->mnt_kern_flag & MNTK_MWAIT)
500 wakeup((caddr_t)mp);
501 free((caddr_t)mp, M_MOUNT);
502 return (0);
503}
504
505/*
506 * Sync each mounted filesystem.
507 */
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508
509#ifdef DEBUG
510static int syncprt = 0;
511SYSCTL_INT(_debug, OID_AUTO, syncprt, CTLFLAG_RW, &syncprt, 0, "");
512#endif
513
514/* ARGSUSED */
515int
41c20dac 516sync(struct sync_args *uap)
984263bc 517{
dadab5e9 518 struct thread *td = curthread;
41c20dac 519 struct mount *mp, *nmp;
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520 int asyncflag;
521
8a8d5d85 522 lwkt_gettoken(&mountlist_token);
984263bc 523 for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
8a8d5d85 524 if (vfs_busy(mp, LK_NOWAIT, &mountlist_token, td)) {
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525 nmp = TAILQ_NEXT(mp, mnt_list);
526 continue;
527 }
528 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
529 asyncflag = mp->mnt_flag & MNT_ASYNC;
530 mp->mnt_flag &= ~MNT_ASYNC;
531 vfs_msync(mp, MNT_NOWAIT);
3b568787 532 VFS_SYNC(mp, MNT_NOWAIT, td);
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533 mp->mnt_flag |= asyncflag;
534 }
8a8d5d85 535 lwkt_gettoken(&mountlist_token);
984263bc 536 nmp = TAILQ_NEXT(mp, mnt_list);
dadab5e9 537 vfs_unbusy(mp, td);
984263bc 538 }
8a8d5d85 539 lwkt_reltoken(&mountlist_token);
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540#if 0
541/*
542 * XXX don't call vfs_bufstats() yet because that routine
543 * was not imported in the Lite2 merge.
544 */
545#ifdef DIAGNOSTIC
546 if (syncprt)
547 vfs_bufstats();
548#endif /* DIAGNOSTIC */
549#endif
550 return (0);
551}
552
553/* XXX PRISON: could be per prison flag */
554static int prison_quotas;
555#if 0
556SYSCTL_INT(_kern_prison, OID_AUTO, quotas, CTLFLAG_RW, &prison_quotas, 0, "");
557#endif
558
559/*
41c20dac
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560 * quotactl_args(char *path, int fcmd, int uid, caddr_t arg)
561 *
984263bc
MD
562 * Change filesystem quotas.
563 */
984263bc
MD
564/* ARGSUSED */
565int
41c20dac 566quotactl(struct quotactl_args *uap)
984263bc 567{
dadab5e9
MD
568 struct thread *td = curthread;
569 struct proc *p = td->td_proc;
41c20dac 570 struct mount *mp;
984263bc
MD
571 int error;
572 struct nameidata nd;
573
dadab5e9 574 KKASSERT(p);
41c20dac 575 if (p->p_ucred->cr_prison && !prison_quotas)
984263bc 576 return (EPERM);
2b69e610
MD
577 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE,
578 SCARG(uap, path), td);
984263bc
MD
579 if ((error = namei(&nd)) != 0)
580 return (error);
581 mp = nd.ni_vp->v_mount;
582 NDFREE(&nd, NDF_ONLY_PNBUF);
583 vrele(nd.ni_vp);
584 return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
dadab5e9 585 SCARG(uap, arg), td));
984263bc
MD
586}
587
984263bc 588int
9697c509 589kern_statfs(struct nameidata *nd, struct statfs *buf)
984263bc 590{
dadab5e9 591 struct thread *td = curthread;
41c20dac
MD
592 struct mount *mp;
593 struct statfs *sp;
984263bc 594 int error;
984263bc 595
9697c509
DRJ
596 error = namei(nd);
597 if (error)
984263bc 598 return (error);
9697c509 599 mp = nd->ni_vp->v_mount;
984263bc 600 sp = &mp->mnt_stat;
9697c509
DRJ
601 NDFREE(nd, NDF_ONLY_PNBUF);
602 vrele(nd->ni_vp);
dadab5e9 603 error = VFS_STATFS(mp, sp, td);
984263bc
MD
604 if (error)
605 return (error);
606 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
9697c509
DRJ
607 bcopy(sp, buf, sizeof(*buf));
608 /* Only root should have access to the fsid's. */
609 if (suser(td))
610 buf->f_fsid.val[0] = buf->f_fsid.val[1] = 0;
611 return (0);
984263bc
MD
612}
613
614/*
9697c509 615 * statfs_args(char *path, struct statfs *buf)
41c20dac 616 *
984263bc
MD
617 * Get filesystem statistics.
618 */
984263bc 619int
9697c509
DRJ
620statfs(struct statfs_args *uap)
621{
622 struct thread *td = curthread;
623 struct nameidata nd;
624 struct statfs buf;
625 int error;
626
627 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, uap->path, td);
628
629 error = kern_statfs(&nd, &buf);
630
631 if (error == 0)
632 error = copyout(&buf, uap->buf, sizeof(*uap->buf));
633 return (error);
634}
635
636int
637kern_fstatfs(int fd, struct statfs *buf)
984263bc 638{
dadab5e9
MD
639 struct thread *td = curthread;
640 struct proc *p = td->td_proc;
984263bc
MD
641 struct file *fp;
642 struct mount *mp;
1fd87d54 643 struct statfs *sp;
984263bc 644 int error;
984263bc 645
dadab5e9 646 KKASSERT(p);
9697c509
DRJ
647 error = getvnode(p->p_fd, fd, &fp);
648 if (error)
984263bc
MD
649 return (error);
650 mp = ((struct vnode *)fp->f_data)->v_mount;
651 if (mp == NULL)
652 return (EBADF);
653 sp = &mp->mnt_stat;
dadab5e9 654 error = VFS_STATFS(mp, sp, td);
984263bc
MD
655 if (error)
656 return (error);
657 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
9697c509
DRJ
658 bcopy(sp, buf, sizeof(*buf));
659 /* Only root should have access to the fsid's. */
660 if (suser(td))
661 buf->f_fsid.val[0] = buf->f_fsid.val[1] = 0;
662 return (0);
663}
664
665/*
666 * fstatfs_args(int fd, struct statfs *buf)
667 *
668 * Get filesystem statistics.
669 */
670int
671fstatfs(struct fstatfs_args *uap)
672{
673 struct statfs buf;
674 int error;
675
676 error = kern_fstatfs(uap->fd, &buf);
677
678 if (error == 0)
679 error = copyout(&buf, uap->buf, sizeof(*uap->buf));
680 return (error);
984263bc
MD
681}
682
683/*
41c20dac
MD
684 * getfsstat_args(struct statfs *buf, long bufsize, int flags)
685 *
984263bc
MD
686 * Get statistics on all filesystems.
687 */
41c20dac 688/* ARGSUSED */
984263bc 689int
41c20dac 690getfsstat(struct getfsstat_args *uap)
984263bc 691{
dadab5e9 692 struct thread *td = curthread;
41c20dac
MD
693 struct mount *mp, *nmp;
694 struct statfs *sp;
984263bc
MD
695 caddr_t sfsp;
696 long count, maxcount, error;
697
698 maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);
699 sfsp = (caddr_t)SCARG(uap, buf);
700 count = 0;
8a8d5d85 701 lwkt_gettoken(&mountlist_token);
984263bc 702 for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) {
8a8d5d85 703 if (vfs_busy(mp, LK_NOWAIT, &mountlist_token, td)) {
984263bc
MD
704 nmp = TAILQ_NEXT(mp, mnt_list);
705 continue;
706 }
707 if (sfsp && count < maxcount) {
708 sp = &mp->mnt_stat;
709 /*
710 * If MNT_NOWAIT or MNT_LAZY is specified, do not
711 * refresh the fsstat cache. MNT_NOWAIT or MNT_LAZY
712 * overrides MNT_WAIT.
713 */
714 if (((SCARG(uap, flags) & (MNT_LAZY|MNT_NOWAIT)) == 0 ||
715 (SCARG(uap, flags) & MNT_WAIT)) &&
dadab5e9 716 (error = VFS_STATFS(mp, sp, td))) {
8a8d5d85 717 lwkt_gettoken(&mountlist_token);
984263bc 718 nmp = TAILQ_NEXT(mp, mnt_list);
dadab5e9 719 vfs_unbusy(mp, td);
984263bc
MD
720 continue;
721 }
722 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
723 error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
724 if (error) {
dadab5e9 725 vfs_unbusy(mp, td);
984263bc
MD
726 return (error);
727 }
728 sfsp += sizeof(*sp);
729 }
730 count++;
8a8d5d85 731 lwkt_gettoken(&mountlist_token);
984263bc 732 nmp = TAILQ_NEXT(mp, mnt_list);
dadab5e9 733 vfs_unbusy(mp, td);
984263bc 734 }
8a8d5d85 735 lwkt_reltoken(&mountlist_token);
984263bc 736 if (sfsp && count > maxcount)
c7114eea 737 uap->sysmsg_result = maxcount;
984263bc 738 else
c7114eea 739 uap->sysmsg_result = count;
984263bc
MD
740 return (0);
741}
742
743/*
41c20dac
MD
744 * fchdir_args(int fd)
745 *
984263bc
MD
746 * Change current working directory to a given file descriptor.
747 */
984263bc
MD
748/* ARGSUSED */
749int
41c20dac 750fchdir(struct fchdir_args *uap)
984263bc 751{
dadab5e9
MD
752 struct thread *td = curthread;
753 struct proc *p = td->td_proc;
41c20dac 754 struct filedesc *fdp = p->p_fd;
984263bc
MD
755 struct vnode *vp, *tdp;
756 struct mount *mp;
757 struct file *fp;
758 int error;
759
760 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
761 return (error);
762 vp = (struct vnode *)fp->f_data;
763 VREF(vp);
dadab5e9 764 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
765 if (vp->v_type != VDIR)
766 error = ENOTDIR;
767 else
dadab5e9 768 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, td);
984263bc 769 while (!error && (mp = vp->v_mountedhere) != NULL) {
dadab5e9 770 if (vfs_busy(mp, 0, 0, td))
984263bc
MD
771 continue;
772 error = VFS_ROOT(mp, &tdp);
dadab5e9 773 vfs_unbusy(mp, td);
984263bc
MD
774 if (error)
775 break;
776 vput(vp);
777 vp = tdp;
778 }
779 if (error) {
780 vput(vp);
781 return (error);
782 }
dadab5e9 783 VOP_UNLOCK(vp, 0, td);
984263bc
MD
784 vrele(fdp->fd_cdir);
785 fdp->fd_cdir = vp;
786 return (0);
787}
788
9697c509
DRJ
789int
790kern_chdir(struct nameidata *nd)
791{
792 struct thread *td = curthread;
793 struct proc *p = td->td_proc;
794 struct filedesc *fdp = p->p_fd;
795 int error;
796
797 error = change_dir(nd, td);
798 if (error)
799 return (error);
800 NDFREE(nd, NDF_ONLY_PNBUF);
801 vrele(fdp->fd_cdir);
802 fdp->fd_cdir = nd->ni_vp;
803 return (0);
804}
805
984263bc 806/*
41c20dac
MD
807 * chdir_args(char *path)
808 *
984263bc
MD
809 * Change current working directory (``.'').
810 */
984263bc 811int
41c20dac 812chdir(struct chdir_args *uap)
984263bc 813{
dadab5e9 814 struct thread *td = curthread;
984263bc 815 struct nameidata nd;
9697c509 816 int error;
984263bc 817
2b69e610 818 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
9697c509
DRJ
819 uap->path, td);
820
821 error = kern_chdir(&nd);
822
823 return (error);
984263bc
MD
824}
825
826/*
827 * Helper function for raised chroot(2) security function: Refuse if
828 * any filedescriptors are open directories.
829 */
830static int
831chroot_refuse_vdir_fds(fdp)
832 struct filedesc *fdp;
833{
834 struct vnode *vp;
835 struct file *fp;
836 int error;
837 int fd;
838
839 for (fd = 0; fd < fdp->fd_nfiles ; fd++) {
840 error = getvnode(fdp, fd, &fp);
841 if (error)
842 continue;
843 vp = (struct vnode *)fp->f_data;
844 if (vp->v_type != VDIR)
845 continue;
846 return(EPERM);
847 }
848 return (0);
849}
850
851/*
852 * This sysctl determines if we will allow a process to chroot(2) if it
853 * has a directory open:
854 * 0: disallowed for all processes.
855 * 1: allowed for processes that were not already chroot(2)'ed.
856 * 2: allowed for all processes.
857 */
858
859static int chroot_allow_open_directories = 1;
860
861SYSCTL_INT(_kern, OID_AUTO, chroot_allow_open_directories, CTLFLAG_RW,
862 &chroot_allow_open_directories, 0, "");
863
864/*
41c20dac
MD
865 * chroot_args(char *path)
866 *
984263bc
MD
867 * Change notion of root (``/'') directory.
868 */
984263bc
MD
869/* ARGSUSED */
870int
41c20dac 871chroot(struct chroot_args *uap)
984263bc 872{
dadab5e9
MD
873 struct thread *td = curthread;
874 struct proc *p = td->td_proc;
41c20dac 875 struct filedesc *fdp = p->p_fd;
984263bc
MD
876 int error;
877 struct nameidata nd;
878
dadab5e9
MD
879 KKASSERT(p);
880 error = suser_cred(p->p_ucred, PRISON_ROOT);
984263bc
MD
881 if (error)
882 return (error);
883 if (chroot_allow_open_directories == 0 ||
884 (chroot_allow_open_directories == 1 && fdp->fd_rdir != rootvnode))
885 error = chroot_refuse_vdir_fds(fdp);
886 if (error)
887 return (error);
2b69e610 888 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
dadab5e9
MD
889 SCARG(uap, path), td);
890 if ((error = change_dir(&nd, td)) != 0)
984263bc
MD
891 return (error);
892 NDFREE(&nd, NDF_ONLY_PNBUF);
893 vrele(fdp->fd_rdir);
894 fdp->fd_rdir = nd.ni_vp;
895 if (!fdp->fd_jdir) {
896 fdp->fd_jdir = nd.ni_vp;
897 VREF(fdp->fd_jdir);
898 }
899 return (0);
900}
901
902/*
903 * Common routine for chroot and chdir.
904 */
905static int
dadab5e9 906change_dir(struct nameidata *ndp, struct thread *td)
984263bc
MD
907{
908 struct vnode *vp;
909 int error;
910
911 error = namei(ndp);
912 if (error)
913 return (error);
914 vp = ndp->ni_vp;
915 if (vp->v_type != VDIR)
916 error = ENOTDIR;
917 else
dadab5e9 918 error = VOP_ACCESS(vp, VEXEC, ndp->ni_cnd.cn_cred, td);
984263bc
MD
919 if (error)
920 vput(vp);
921 else
dadab5e9 922 VOP_UNLOCK(vp, 0, td);
984263bc
MD
923 return (error);
924}
925
984263bc 926int
9697c509 927kern_open(struct nameidata *nd, int oflags, int mode, int *res)
984263bc 928{
dadab5e9
MD
929 struct thread *td = curthread;
930 struct proc *p = td->td_proc;
41c20dac
MD
931 struct filedesc *fdp = p->p_fd;
932 struct file *fp;
933 struct vnode *vp;
9697c509 934 int cmode, flags;
984263bc
MD
935 struct file *nfp;
936 int type, indx, error;
937 struct flock lf;
984263bc 938
984263bc
MD
939 if ((oflags & O_ACCMODE) == O_ACCMODE)
940 return (EINVAL);
941 flags = FFLAGS(oflags);
942 error = falloc(p, &nfp, &indx);
943 if (error)
944 return (error);
945 fp = nfp;
9697c509 946 cmode = ((mode &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
984263bc
MD
947 p->p_dupfd = -indx - 1; /* XXX check for fdopen */
948 /*
949 * Bump the ref count to prevent another process from closing
950 * the descriptor while we are blocked in vn_open()
951 */
952 fhold(fp);
9697c509 953 error = vn_open(nd, flags, cmode);
984263bc
MD
954 if (error) {
955 /*
956 * release our own reference
957 */
dadab5e9 958 fdrop(fp, td);
984263bc
MD
959
960 /*
961 * handle special fdopen() case. bleh. dupfdopen() is
962 * responsible for dropping the old contents of ofiles[indx]
963 * if it succeeds.
964 */
965 if ((error == ENODEV || error == ENXIO) &&
966 p->p_dupfd >= 0 && /* XXX from fdopen */
967 (error =
41c20dac 968 dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {
9697c509 969 *res = indx;
984263bc
MD
970 return (0);
971 }
972 /*
973 * Clean up the descriptor, but only if another thread hadn't
974 * replaced or closed it.
975 */
976 if (fdp->fd_ofiles[indx] == fp) {
977 fdp->fd_ofiles[indx] = NULL;
dadab5e9 978 fdrop(fp, td);
984263bc
MD
979 }
980
981 if (error == ERESTART)
982 error = EINTR;
983 return (error);
984 }
985 p->p_dupfd = 0;
9697c509
DRJ
986 NDFREE(nd, NDF_ONLY_PNBUF);
987 vp = nd->ni_vp;
984263bc
MD
988
989 /*
990 * There should be 2 references on the file, one from the descriptor
991 * table, and one for us.
992 *
993 * Handle the case where someone closed the file (via its file
994 * descriptor) while we were blocked. The end result should look
995 * like opening the file succeeded but it was immediately closed.
996 */
997 if (fp->f_count == 1) {
998 KASSERT(fdp->fd_ofiles[indx] != fp,
999 ("Open file descriptor lost all refs"));
dadab5e9 1000 VOP_UNLOCK(vp, 0, td);
3b568787 1001 vn_close(vp, flags & FMASK, td);
dadab5e9 1002 fdrop(fp, td);
9697c509 1003 *res = indx;
984263bc
MD
1004 return 0;
1005 }
1006
1007 fp->f_data = (caddr_t)vp;
1008 fp->f_flag = flags & FMASK;
1009 fp->f_ops = &vnops;
1010 fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : DTYPE_VNODE);
1011 if (flags & (O_EXLOCK | O_SHLOCK)) {
1012 lf.l_whence = SEEK_SET;
1013 lf.l_start = 0;
1014 lf.l_len = 0;
1015 if (flags & O_EXLOCK)
1016 lf.l_type = F_WRLCK;
1017 else
1018 lf.l_type = F_RDLCK;
1019 type = F_FLOCK;
1020 if ((flags & FNONBLOCK) == 0)
1021 type |= F_WAIT;
dadab5e9 1022 VOP_UNLOCK(vp, 0, td);
984263bc
MD
1023 if ((error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) != 0) {
1024 /*
1025 * lock request failed. Normally close the descriptor
1026 * but handle the case where someone might have dup()d
1027 * it when we weren't looking. One reference is
1028 * owned by the descriptor array, the other by us.
1029 */
1030 if (fdp->fd_ofiles[indx] == fp) {
1031 fdp->fd_ofiles[indx] = NULL;
dadab5e9 1032 fdrop(fp, td);
984263bc 1033 }
dadab5e9 1034 fdrop(fp, td);
984263bc
MD
1035 return (error);
1036 }
dadab5e9 1037 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1038 fp->f_flag |= FHASLOCK;
1039 }
1040 /* assert that vn_open created a backing object if one is needed */
1041 KASSERT(!vn_canvmio(vp) || VOP_GETVOBJECT(vp, NULL) == 0,
1042 ("open: vmio vnode has no backing object after vn_open"));
dadab5e9 1043 VOP_UNLOCK(vp, 0, td);
984263bc
MD
1044
1045 /*
1046 * release our private reference, leaving the one associated with the
1047 * descriptor table intact.
1048 */
dadab5e9 1049 fdrop(fp, td);
9697c509 1050 *res = indx;
984263bc
MD
1051 return (0);
1052}
1053
984263bc 1054/*
9697c509 1055 * open_args(char *path, int flags, int mode)
41c20dac 1056 *
9697c509
DRJ
1057 * Check permissions, allocate an open file structure,
1058 * and call the device open routine if any.
984263bc 1059 */
984263bc 1060int
9697c509 1061open(struct open_args *uap)
984263bc 1062{
9697c509
DRJ
1063 struct thread *td = curthread;
1064 struct nameidata nd;
1065 int error;
1066
1067 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, uap->path, td);
984263bc 1068
9697c509
DRJ
1069 error = kern_open(&nd, uap->flags, uap->mode, &uap->sysmsg_result);
1070
1071 return (error);
984263bc 1072}
984263bc 1073
984263bc 1074int
9697c509 1075kern_mknod(struct nameidata *nd, int mode, int dev)
984263bc 1076{
dadab5e9
MD
1077 struct thread *td = curthread;
1078 struct proc *p = td->td_proc;
41c20dac 1079 struct vnode *vp;
984263bc
MD
1080 struct vattr vattr;
1081 int error;
1082 int whiteout = 0;
984263bc 1083
dadab5e9
MD
1084 KKASSERT(p);
1085
9697c509 1086 switch (mode & S_IFMT) {
984263bc
MD
1087 case S_IFCHR:
1088 case S_IFBLK:
dadab5e9 1089 error = suser(td);
984263bc
MD
1090 break;
1091 default:
dadab5e9 1092 error = suser_cred(p->p_ucred, PRISON_ROOT);
984263bc
MD
1093 break;
1094 }
1095 if (error)
1096 return (error);
1097 bwillwrite();
9697c509
DRJ
1098 error = namei(nd);
1099 if (error)
984263bc 1100 return (error);
9697c509 1101 vp = nd->ni_vp;
984263bc
MD
1102 if (vp != NULL)
1103 error = EEXIST;
1104 else {
1105 VATTR_NULL(&vattr);
9697c509
DRJ
1106 vattr.va_mode = (mode & ALLPERMS) &~ p->p_fd->fd_cmask;
1107 vattr.va_rdev = dev;
984263bc
MD
1108 whiteout = 0;
1109
9697c509 1110 switch (mode & S_IFMT) {
984263bc
MD
1111 case S_IFMT: /* used by badsect to flag bad sectors */
1112 vattr.va_type = VBAD;
1113 break;
1114 case S_IFCHR:
1115 vattr.va_type = VCHR;
1116 break;
1117 case S_IFBLK:
1118 vattr.va_type = VBLK;
1119 break;
1120 case S_IFWHT:
1121 whiteout = 1;
1122 break;
1123 default:
1124 error = EINVAL;
1125 break;
1126 }
1127 }
9697c509
DRJ
1128 if (error == 0) {
1129 VOP_LEASE(nd->ni_dvp, td, p->p_ucred, LEASE_WRITE);
984263bc 1130 if (whiteout)
9697c509
DRJ
1131 error = VOP_WHITEOUT(nd->ni_dvp, NCPNULL,
1132 &nd->ni_cnd, NAMEI_CREATE);
984263bc 1133 else {
9697c509
DRJ
1134 error = VOP_MKNOD(nd->ni_dvp, NCPNULL, &nd->ni_vp,
1135 &nd->ni_cnd, &vattr);
984263bc 1136 if (error == 0)
9697c509 1137 vput(nd->ni_vp);
984263bc 1138 }
9697c509
DRJ
1139 NDFREE(nd, NDF_ONLY_PNBUF);
1140 vput(nd->ni_dvp);
984263bc 1141 } else {
9697c509
DRJ
1142 NDFREE(nd, NDF_ONLY_PNBUF);
1143 if (nd->ni_dvp == vp)
1144 vrele(nd->ni_dvp);
984263bc 1145 else
9697c509 1146 vput(nd->ni_dvp);
984263bc
MD
1147 if (vp)
1148 vrele(vp);
1149 }
9697c509 1150 ASSERT_VOP_UNLOCKED(nd->ni_dvp, "mknod");
6af514a4 1151 ASSERT_VOP_UNLOCKED(nd->ni_vp, "mknod");
9697c509
DRJ
1152 return (error);
1153}
1154
1155/*
1156 * mknod_args(char *path, int mode, int dev)
1157 *
1158 * Create a special file.
1159 */
1160int
1161mknod(struct mknod_args *uap)
1162{
1163 struct thread *td = curthread;
1164 struct nameidata nd;
1165 int error;
1166
1167 NDINIT(&nd, NAMEI_CREATE, CNP_LOCKPARENT, UIO_USERSPACE, uap->path,
1168 td);
1169
1170 error = kern_mknod(&nd, uap->mode, uap->dev);
1171
984263bc
MD
1172 return (error);
1173}
1174
1175/*
41c20dac
MD
1176 * mkfifo_args(char *path, int mode)
1177 *
984263bc
MD
1178 * Create a named pipe.
1179 */
984263bc
MD
1180/* ARGSUSED */
1181int
41c20dac 1182mkfifo(struct mkfifo_args *uap)
984263bc 1183{
dadab5e9
MD
1184 struct thread *td = curthread;
1185 struct proc *p = td->td_proc;
984263bc
MD
1186 struct vattr vattr;
1187 int error;
1188 struct nameidata nd;
1189
1190 bwillwrite();
2b69e610
MD
1191 NDINIT(&nd, NAMEI_CREATE, CNP_LOCKPARENT, UIO_USERSPACE,
1192 SCARG(uap, path), td);
984263bc
MD
1193 if ((error = namei(&nd)) != 0)
1194 return (error);
1195 if (nd.ni_vp != NULL) {
1196 NDFREE(&nd, NDF_ONLY_PNBUF);
1197 if (nd.ni_dvp == nd.ni_vp)
1198 vrele(nd.ni_dvp);
1199 else
1200 vput(nd.ni_dvp);
1201 vrele(nd.ni_vp);
1202 return (EEXIST);
1203 }
1204 VATTR_NULL(&vattr);
1205 vattr.va_type = VFIFO;
1206 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
dadab5e9 1207 VOP_LEASE(nd.ni_dvp, td, p->p_ucred, LEASE_WRITE);
bc0c094e 1208 error = VOP_MKNOD(nd.ni_dvp, NCPNULL, &nd.ni_vp, &nd.ni_cnd, &vattr);
984263bc
MD
1209 if (error == 0)
1210 vput(nd.ni_vp);
1211 NDFREE(&nd, NDF_ONLY_PNBUF);
1212 vput(nd.ni_dvp);
1213 return (error);
1214}
1215
984263bc 1216int
9697c509 1217kern_link(struct nameidata *nd, struct nameidata *linknd)
984263bc 1218{
dadab5e9
MD
1219 struct thread *td = curthread;
1220 struct proc *p = td->td_proc;
41c20dac 1221 struct vnode *vp;
984263bc
MD
1222 int error;
1223
1224 bwillwrite();
9697c509
DRJ
1225 error = namei(nd);
1226 if (error)
984263bc 1227 return (error);
9697c509
DRJ
1228 NDFREE(nd, NDF_ONLY_PNBUF);
1229 vp = nd->ni_vp;
984263bc
MD
1230 if (vp->v_type == VDIR)
1231 error = EPERM; /* POSIX */
1232 else {
9697c509
DRJ
1233 error = namei(linknd);
1234 if (error == 0) {
1235 if (linknd->ni_vp != NULL) {
1236 if (linknd->ni_vp)
1237 vrele(linknd->ni_vp);
984263bc
MD
1238 error = EEXIST;
1239 } else {
9697c509 1240 VOP_LEASE(linknd->ni_dvp, td, p->p_ucred,
984263bc 1241 LEASE_WRITE);
dadab5e9 1242 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
9697c509
DRJ
1243 error = VOP_LINK(linknd->ni_dvp, NCPNULL, vp,
1244 &linknd->ni_cnd);
984263bc 1245 }
9697c509
DRJ
1246 NDFREE(linknd, NDF_ONLY_PNBUF);
1247 if (linknd->ni_dvp == linknd->ni_vp)
1248 vrele(linknd->ni_dvp);
984263bc 1249 else
9697c509
DRJ
1250 vput(linknd->ni_dvp);
1251 ASSERT_VOP_UNLOCKED(linknd->ni_dvp, "link");
1252 ASSERT_VOP_UNLOCKED(linknd->ni_vp, "link");
984263bc
MD
1253 }
1254 }
1255 vrele(vp);
984263bc
MD
1256 return (error);
1257}
1258
1259/*
9697c509 1260 * link_args(char *path, char *link)
41c20dac 1261 *
9697c509 1262 * Make a hard file link.
984263bc 1263 */
984263bc 1264int
9697c509
DRJ
1265link(struct link_args *uap)
1266{
1267 struct thread *td = curthread;
1268 struct nameidata nd, linknd;
1269 int error;
1270
1271 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_NOOBJ, UIO_USERSPACE,
1272 uap->path, td);
1273 NDINIT(&linknd, NAMEI_CREATE, CNP_LOCKPARENT | CNP_NOOBJ,
1274 UIO_USERSPACE, uap->link, td);
1275
1276 error = kern_link(&nd, &linknd);
1277
1278 return (error);
1279}
1280
1281int
1282kern_symlink(char *path, struct nameidata *nd)
984263bc 1283{
dadab5e9
MD
1284 struct thread *td = curthread;
1285 struct proc *p = td->td_proc;
984263bc 1286 struct vattr vattr;
984263bc 1287 int error;
984263bc 1288
984263bc 1289 bwillwrite();
9697c509
DRJ
1290 error = namei(nd);
1291 if (error)
1292 return (error);
1293 if (nd->ni_vp) {
1294 NDFREE(nd, NDF_ONLY_PNBUF);
1295 if (nd->ni_dvp == nd->ni_vp)
1296 vrele(nd->ni_dvp);
984263bc 1297 else
9697c509
DRJ
1298 vput(nd->ni_dvp);
1299 vrele(nd->ni_vp);
1300 return (EEXIST);
984263bc
MD
1301 }
1302 VATTR_NULL(&vattr);
1303 vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;
9697c509
DRJ
1304 VOP_LEASE(nd->ni_dvp, td, p->p_ucred, LEASE_WRITE);
1305 error = VOP_SYMLINK(nd->ni_dvp, NCPNULL, &nd->ni_vp, &nd->ni_cnd,
1306 &vattr, path);
1307 NDFREE(nd, NDF_ONLY_PNBUF);
984263bc 1308 if (error == 0)
9697c509
DRJ
1309 vput(nd->ni_vp);
1310 vput(nd->ni_dvp);
1311 ASSERT_VOP_UNLOCKED(nd->ni_dvp, "symlink");
1312 ASSERT_VOP_UNLOCKED(nd->ni_vp, "symlink");
1313
1314 return (error);
1315}
1316
1317/*
1318 * symlink(char *path, char *link)
1319 *
1320 * Make a symbolic link.
1321 */
1322int
1323symlink(struct symlink_args *uap)
1324{
1325 struct thread *td = curthread;
1326 struct nameidata nd;
1327 char *path;
1328 int error;
1329
1330 path = zalloc(namei_zone);
1331 error = copyinstr(uap->path, path, MAXPATHLEN, NULL);
1332 if (error)
1333 return (error);
1334 NDINIT(&nd, NAMEI_CREATE, CNP_LOCKPARENT | CNP_NOOBJ, UIO_USERSPACE,
1335 uap->link, td);
1336
1337 error = kern_symlink(path, &nd);
1338
984263bc
MD
1339 zfree(namei_zone, path);
1340 return (error);
1341}
1342
1343/*
41c20dac
MD
1344 * undelete_args(char *path)
1345 *
984263bc
MD
1346 * Delete a whiteout from the filesystem.
1347 */
1348/* ARGSUSED */
1349int
41c20dac 1350undelete(struct undelete_args *uap)
984263bc 1351{
dadab5e9
MD
1352 struct thread *td = curthread;
1353 struct proc *p = td->td_proc;
984263bc
MD
1354 int error;
1355 struct nameidata nd;
1356
1357 bwillwrite();
2b69e610 1358 NDINIT(&nd, NAMEI_DELETE, CNP_LOCKPARENT | CNP_DOWHITEOUT, UIO_USERSPACE,
dadab5e9 1359 SCARG(uap, path), td);
984263bc
MD
1360 error = namei(&nd);
1361 if (error)
1362 return (error);
1363
2b69e610 1364 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & CNP_ISWHITEOUT)) {
984263bc
MD
1365 NDFREE(&nd, NDF_ONLY_PNBUF);
1366 if (nd.ni_dvp == nd.ni_vp)
1367 vrele(nd.ni_dvp);
1368 else
1369 vput(nd.ni_dvp);
1370 if (nd.ni_vp)
1371 vrele(nd.ni_vp);
1372 return (EEXIST);
1373 }
1374
dadab5e9 1375 VOP_LEASE(nd.ni_dvp, td, p->p_ucred, LEASE_WRITE);
bc0c094e 1376 error = VOP_WHITEOUT(nd.ni_dvp, NCPNULL, &nd.ni_cnd, NAMEI_DELETE);
984263bc
MD
1377 NDFREE(&nd, NDF_ONLY_PNBUF);
1378 vput(nd.ni_dvp);
1379 ASSERT_VOP_UNLOCKED(nd.ni_dvp, "undelete");
1380 ASSERT_VOP_UNLOCKED(nd.ni_vp, "undelete");
1381 return (error);
1382}
1383
984263bc 1384int
9697c509 1385kern_unlink(struct nameidata *nd)
984263bc 1386{
dadab5e9
MD
1387 struct thread *td = curthread;
1388 struct proc *p = td->td_proc;
41c20dac 1389 struct vnode *vp;
984263bc 1390 int error;
984263bc
MD
1391
1392 bwillwrite();
9697c509
DRJ
1393 error = namei(nd);
1394 if (error)
984263bc 1395 return (error);
9697c509 1396 vp = nd->ni_vp;
dadab5e9
MD
1397 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
1398 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1399
1400 if (vp->v_type == VDIR)
1401 error = EPERM; /* POSIX */
1402 else {
1403 /*
1404 * The root of a mounted filesystem cannot be deleted.
1405 *
1406 * XXX: can this only be a VDIR case?
1407 */
1408 if (vp->v_flag & VROOT)
1409 error = EBUSY;
1410 }
1411
9697c509
DRJ
1412 if (error == 0) {
1413 VOP_LEASE(nd->ni_dvp, td, p->p_ucred, LEASE_WRITE);
1414 error = VOP_REMOVE(nd->ni_dvp, NCPNULL, vp, &nd->ni_cnd);
984263bc 1415 }
9697c509
DRJ
1416 NDFREE(nd, NDF_ONLY_PNBUF);
1417 if (nd->ni_dvp == vp)
1418 vrele(nd->ni_dvp);
984263bc 1419 else
9697c509 1420 vput(nd->ni_dvp);
984263bc
MD
1421 if (vp != NULLVP)
1422 vput(vp);
9697c509
DRJ
1423 ASSERT_VOP_UNLOCKED(nd->ni_dvp, "unlink");
1424 ASSERT_VOP_UNLOCKED(nd->ni_vp, "unlink");
984263bc
MD
1425 return (error);
1426}
1427
1428/*
9697c509 1429 * unlink_args(char *path)
41c20dac 1430 *
9697c509 1431 * Delete a name from the filesystem.
984263bc 1432 */
984263bc 1433int
9697c509
DRJ
1434unlink(struct unlink_args *uap)
1435{
1436 struct thread *td = curthread;
1437 struct nameidata nd;
1438 int error;
1439
1440 NDINIT(&nd, NAMEI_DELETE, CNP_LOCKPARENT, UIO_USERSPACE, uap->path,
1441 td);
1442
1443 error = kern_unlink(&nd);
1444
1445 return (error);
1446}
1447
1448int
5a3fe67d 1449kern_lseek(int fd, off_t offset, int whence, off_t *res)
984263bc 1450{
dadab5e9
MD
1451 struct thread *td = curthread;
1452 struct proc *p = td->td_proc;
41c20dac
MD
1453 struct filedesc *fdp = p->p_fd;
1454 struct file *fp;
984263bc
MD
1455 struct vattr vattr;
1456 int error;
1457
9697c509
DRJ
1458 if (fd >= fdp->fd_nfiles ||
1459 (fp = fdp->fd_ofiles[fd]) == NULL)
984263bc
MD
1460 return (EBADF);
1461 if (fp->f_type != DTYPE_VNODE)
1462 return (ESPIPE);
9697c509 1463 switch (whence) {
984263bc 1464 case L_INCR:
9697c509 1465 fp->f_offset += offset;
984263bc
MD
1466 break;
1467 case L_XTND:
3b568787 1468 error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, td);
984263bc
MD
1469 if (error)
1470 return (error);
9697c509 1471 fp->f_offset = offset + vattr.va_size;
984263bc
MD
1472 break;
1473 case L_SET:
9697c509 1474 fp->f_offset = offset;
984263bc
MD
1475 break;
1476 default:
1477 return (EINVAL);
1478 }
9697c509 1479 *res = fp->f_offset;
984263bc
MD
1480 return (0);
1481}
1482
984263bc 1483/*
9697c509 1484 * lseek_args(int fd, int pad, off_t offset, int whence)
41c20dac 1485 *
9697c509 1486 * Reposition read/write file offset.
984263bc 1487 */
984263bc 1488int
9697c509 1489lseek(struct lseek_args *uap)
984263bc 1490{
984263bc
MD
1491 int error;
1492
9697c509 1493 error = kern_lseek(uap->fd, uap->offset, uap->whence,
5a3fe67d 1494 &uap->sysmsg_offset);
9697c509 1495
984263bc
MD
1496 return (error);
1497}
984263bc 1498
984263bc 1499int
9697c509 1500kern_access(struct nameidata *nd, int aflags)
984263bc 1501{
dadab5e9
MD
1502 struct thread *td = curthread;
1503 struct proc *p = td->td_proc;
984263bc 1504 struct ucred *cred, *tmpcred;
41c20dac 1505 struct vnode *vp;
984263bc 1506 int error, flags;
984263bc
MD
1507
1508 cred = p->p_ucred;
1509 /*
1510 * Create and modify a temporary credential instead of one that
1511 * is potentially shared. This could also mess up socket
1512 * buffer accounting which can run in an interrupt context.
1513 */
1514 tmpcred = crdup(cred);
41c20dac
MD
1515 tmpcred->cr_uid = p->p_ucred->cr_ruid;
1516 tmpcred->cr_groups[0] = p->p_ucred->cr_rgid;
984263bc 1517 p->p_ucred = tmpcred;
9697c509
DRJ
1518 nd->ni_cnd.cn_cred = tmpcred;
1519 error = namei(nd);
1520 if (error)
984263bc 1521 goto out1;
9697c509 1522 vp = nd->ni_vp;
984263bc
MD
1523
1524 /* Flags == 0 means only check for existence. */
9697c509 1525 if (aflags) {
984263bc 1526 flags = 0;
9697c509 1527 if (aflags & R_OK)
984263bc 1528 flags |= VREAD;
9697c509 1529 if (aflags & W_OK)
984263bc 1530 flags |= VWRITE;
9697c509 1531 if (aflags & X_OK)
984263bc
MD
1532 flags |= VEXEC;
1533 if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
dadab5e9 1534 error = VOP_ACCESS(vp, flags, tmpcred, td);
984263bc 1535 }
9697c509 1536 NDFREE(nd, NDF_ONLY_PNBUF);
984263bc
MD
1537 vput(vp);
1538out1:
1539 p->p_ucred = cred;
1540 crfree(tmpcred);
1541 return (error);
1542}
1543
984263bc 1544/*
9697c509 1545 * access_args(char *path, int flags)
41c20dac 1546 *
9697c509 1547 * Check access permissions.
984263bc 1548 */
984263bc 1549int
9697c509 1550access(struct access_args *uap)
984263bc 1551{
dadab5e9 1552 struct thread *td = curthread;
984263bc 1553 struct nameidata nd;
9697c509 1554 int error;
984263bc 1555
2b69e610 1556 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF | CNP_NOOBJ,
9697c509
DRJ
1557 UIO_USERSPACE, uap->path, td);
1558
1559 error = kern_access(&nd, uap->flags);
1560
984263bc
MD
1561 return (error);
1562}
1563
984263bc 1564int
9697c509 1565kern_stat(struct nameidata *nd, struct stat *st)
984263bc 1566{
dadab5e9 1567 struct thread *td = curthread;
984263bc 1568 int error;
984263bc 1569
9697c509 1570 error = namei(nd);
984263bc
MD
1571 if (error)
1572 return (error);
9697c509
DRJ
1573 error = vn_stat(nd->ni_vp, st, td);
1574 NDFREE(nd, NDF_ONLY_PNBUF);
1575 vput(nd->ni_vp);
984263bc
MD
1576 return (error);
1577}
1578
984263bc 1579/*
41c20dac
MD
1580 * stat_args(char *path, struct stat *ub)
1581 *
984263bc
MD
1582 * Get file status; this version follows links.
1583 */
984263bc 1584int
41c20dac 1585stat(struct stat_args *uap)
984263bc 1586{
dadab5e9 1587 struct thread *td = curthread;
984263bc 1588 struct nameidata nd;
9697c509
DRJ
1589 struct stat st;
1590 int error;
984263bc 1591
2b69e610 1592 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF | CNP_NOOBJ,
9697c509
DRJ
1593 UIO_USERSPACE, uap->path, td);
1594
1595 error = kern_stat(&nd, &st);
1596
1597 if (error == 0)
1598 error = copyout(&st, uap->ub, sizeof(*uap->ub));
984263bc
MD
1599 return (error);
1600}
1601
1602/*
41c20dac
MD
1603 * lstat_args(char *path, struct stat *ub)
1604 *
984263bc
MD
1605 * Get file status; this version does not follow links.
1606 */
984263bc 1607int
41c20dac 1608lstat(struct lstat_args *uap)
984263bc 1609{
dadab5e9 1610 struct thread *td = curthread;
984263bc 1611 struct nameidata nd;
9697c509
DRJ
1612 struct stat st;
1613 int error;
984263bc 1614
6fc0e645 1615 NDINIT(&nd, NAMEI_LOOKUP, CNP_LOCKLEAF | CNP_NOOBJ,
2b69e610 1616 UIO_USERSPACE, SCARG(uap, path), td);
9697c509
DRJ
1617
1618 error = kern_stat(&nd, &st);
1619
1620 if (error == 0)
1621 error = copyout(&st, uap->ub, sizeof(*uap->ub));
984263bc
MD
1622 return (error);
1623}
1624
1625void
1626cvtnstat(sb, nsb)
1627 struct stat *sb;
1628 struct nstat *nsb;
1629{
1630 nsb->st_dev = sb->st_dev;
1631 nsb->st_ino = sb->st_ino;
1632 nsb->st_mode = sb->st_mode;
1633 nsb->st_nlink = sb->st_nlink;
1634 nsb->st_uid = sb->st_uid;
1635 nsb->st_gid = sb->st_gid;
1636 nsb->st_rdev = sb->st_rdev;
1637 nsb->st_atimespec = sb->st_atimespec;
1638 nsb->st_mtimespec = sb->st_mtimespec;
1639 nsb->st_ctimespec = sb->st_ctimespec;
1640 nsb->st_size = sb->st_size;
1641 nsb->st_blocks = sb->st_blocks;
1642 nsb->st_blksize = sb->st_blksize;
1643 nsb->st_flags = sb->st_flags;
1644 nsb->st_gen = sb->st_gen;
1645 nsb->st_qspare[0] = sb->st_qspare[0];
1646 nsb->st_qspare[1] = sb->st_qspare[1];
1647}
1648
41c20dac
MD
1649/*
1650 * nstat_args(char *path, struct nstat *ub)
1651 */
984263bc
MD
1652/* ARGSUSED */
1653int
41c20dac 1654nstat(struct nstat_args *uap)
984263bc 1655{
dadab5e9 1656 struct thread *td = curthread;
984263bc
MD
1657 struct stat sb;
1658 struct nstat nsb;
1659 int error;
1660 struct nameidata nd;
1661
2b69e610
MD
1662 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF | CNP_NOOBJ,
1663 UIO_USERSPACE, SCARG(uap, path), td);
984263bc
MD
1664 if ((error = namei(&nd)) != 0)
1665 return (error);
1666 NDFREE(&nd, NDF_ONLY_PNBUF);
dadab5e9 1667 error = vn_stat(nd.ni_vp, &sb, td);
984263bc
MD
1668 vput(nd.ni_vp);
1669 if (error)
1670 return (error);
1671 cvtnstat(&sb, &nsb);
1672 error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
1673 return (error);
1674}
1675
1676/*
41c20dac
MD
1677 * lstat_args(char *path, struct stat *ub)
1678 *
984263bc
MD
1679 * Get file status; this version does not follow links.
1680 */
984263bc
MD
1681/* ARGSUSED */
1682int
41c20dac 1683nlstat(struct nlstat_args *uap)
984263bc 1684{
dadab5e9 1685 struct thread *td = curthread;
984263bc
MD
1686 int error;
1687 struct vnode *vp;
1688 struct stat sb;
1689 struct nstat nsb;
1690 struct nameidata nd;
1691
6fc0e645 1692 NDINIT(&nd, NAMEI_LOOKUP, CNP_LOCKLEAF | CNP_NOOBJ,
2b69e610 1693 UIO_USERSPACE, SCARG(uap, path), td);
984263bc
MD
1694 if ((error = namei(&nd)) != 0)
1695 return (error);
1696 vp = nd.ni_vp;
1697 NDFREE(&nd, NDF_ONLY_PNBUF);
dadab5e9 1698 error = vn_stat(vp, &sb, td);
984263bc
MD
1699 vput(vp);
1700 if (error)
1701 return (error);
1702 cvtnstat(&sb, &nsb);
1703 error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
1704 return (error);
1705}
1706
1707/*
41c20dac
MD
1708 * pathconf_Args(char *path, int name)
1709 *
984263bc
MD
1710 * Get configurable pathname variables.
1711 */
984263bc
MD
1712/* ARGSUSED */
1713int
41c20dac 1714pathconf(struct pathconf_args *uap)
984263bc 1715{
dadab5e9 1716 struct thread *td = curthread;
984263bc
MD
1717 int error;
1718 struct nameidata nd;
1719
2b69e610
MD
1720 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF | CNP_NOOBJ,
1721 UIO_USERSPACE, SCARG(uap, path), td);
984263bc
MD
1722 if ((error = namei(&nd)) != 0)
1723 return (error);
1724 NDFREE(&nd, NDF_ONLY_PNBUF);
c7114eea 1725 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), uap->sysmsg_fds);
984263bc
MD
1726 vput(nd.ni_vp);
1727 return (error);
1728}
1729
984263bc 1730int
9697c509 1731kern_readlink(struct nameidata *nd, char *buf, int count, int *res)
984263bc 1732{
dadab5e9
MD
1733 struct thread *td = curthread;
1734 struct proc *p = td->td_proc;
41c20dac 1735 struct vnode *vp;
984263bc
MD
1736 struct iovec aiov;
1737 struct uio auio;
1738 int error;
984263bc 1739
9697c509
DRJ
1740 error = namei(nd);
1741 if (error)
984263bc 1742 return (error);
9697c509
DRJ
1743 NDFREE(nd, NDF_ONLY_PNBUF);
1744 vp = nd->ni_vp;
984263bc
MD
1745 if (vp->v_type != VLNK)
1746 error = EINVAL;
1747 else {
9697c509
DRJ
1748 aiov.iov_base = buf;
1749 aiov.iov_len = count;
984263bc
MD
1750 auio.uio_iov = &aiov;
1751 auio.uio_iovcnt = 1;
1752 auio.uio_offset = 0;
1753 auio.uio_rw = UIO_READ;
1754 auio.uio_segflg = UIO_USERSPACE;
dadab5e9 1755 auio.uio_td = td;
9697c509 1756 auio.uio_resid = count;
984263bc
MD
1757 error = VOP_READLINK(vp, &auio, p->p_ucred);
1758 }
1759 vput(vp);
9697c509
DRJ
1760 *res = count - auio.uio_resid;
1761 return (error);
1762}
1763
1764/*
1765 * readlink_args(char *path, char *buf, int count)
1766 *
1767 * Return target name of a symbolic link.
1768 */
1769int
1770readlink(struct readlink_args *uap)
1771{
1772 struct thread *td = curthread;
1773 struct nameidata nd;
1774 int error;
1775
1776 NDINIT(&nd, NAMEI_LOOKUP, CNP_LOCKLEAF | CNP_NOOBJ, UIO_USERSPACE,
1777 uap->path, td);
1778
1779 error = kern_readlink(&nd, uap->buf, uap->count,
1780 &uap->sysmsg_result);
1781
984263bc
MD
1782 return (error);
1783}
1784
1785static int
41c20dac 1786setfflags(struct vnode *vp, int flags)
984263bc 1787{
dadab5e9
MD
1788 struct thread *td = curthread;
1789 struct proc *p = td->td_proc;
984263bc
MD
1790 int error;
1791 struct vattr vattr;
1792
1793 /*
1794 * Prevent non-root users from setting flags on devices. When
1795 * a device is reused, users can retain ownership of the device
1796 * if they are allowed to set flags and programs assume that
1797 * chown can't fail when done as root.
1798 */
1799 if ((vp->v_type == VCHR || vp->v_type == VBLK) &&
dadab5e9 1800 ((error = suser_cred(p->p_ucred, PRISON_ROOT)) != 0))
984263bc
MD
1801 return (error);
1802
dadab5e9
MD
1803 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
1804 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1805 VATTR_NULL(&vattr);
1806 vattr.va_flags = flags;
dadab5e9
MD
1807 error = VOP_SETATTR(vp, &vattr, p->p_ucred, td);
1808 VOP_UNLOCK(vp, 0, td);
984263bc
MD
1809 return (error);
1810}
1811
1812/*
41c20dac
MD
1813 * chflags(char *path, int flags)
1814 *
984263bc
MD
1815 * Change flags of a file given a path name.
1816 */
984263bc
MD
1817/* ARGSUSED */
1818int
41c20dac 1819chflags(struct chflags_args *uap)
984263bc 1820{
dadab5e9 1821 struct thread *td = curthread;
984263bc
MD
1822 int error;
1823 struct nameidata nd;
1824
2b69e610
MD
1825 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE,
1826 SCARG(uap, path), td);
984263bc
MD
1827 if ((error = namei(&nd)) != 0)
1828 return (error);
1829 NDFREE(&nd, NDF_ONLY_PNBUF);
41c20dac 1830 error = setfflags(nd.ni_vp, SCARG(uap, flags));
984263bc
MD
1831 vrele(nd.ni_vp);
1832 return error;
1833}
1834
1835/*
41c20dac
MD
1836 * fchflags_args(int fd, int flags)
1837 *
984263bc
MD
1838 * Change flags of a file given a file descriptor.
1839 */
984263bc
MD
1840/* ARGSUSED */
1841int
41c20dac 1842fchflags(struct fchflags_args *uap)
984263bc 1843{
dadab5e9
MD
1844 struct thread *td = curthread;
1845 struct proc *p = td->td_proc;
984263bc
MD
1846 struct file *fp;
1847 int error;
1848
1849 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
1850 return (error);
41c20dac 1851 return setfflags((struct vnode *) fp->f_data, SCARG(uap, flags));
984263bc
MD
1852}
1853
1854static int
41c20dac 1855setfmode(struct vnode *vp, int mode)
984263bc 1856{
dadab5e9
MD
1857 struct thread *td = curthread;
1858 struct proc *p = td->td_proc;
984263bc
MD
1859 int error;
1860 struct vattr vattr;
1861
dadab5e9
MD
1862 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
1863 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1864 VATTR_NULL(&vattr);
1865 vattr.va_mode = mode & ALLPERMS;
dadab5e9
MD
1866 error = VOP_SETATTR(vp, &vattr, p->p_ucred, td);
1867 VOP_UNLOCK(vp, 0, td);
984263bc
MD
1868 return error;
1869}
1870
9697c509
DRJ
1871int
1872kern_chmod(struct nameidata *nd, int mode)
1873{
1874 int error;
1875
1876 error = namei(nd);
1877 if (error)
1878 return (error);
1879 NDFREE(nd, NDF_ONLY_PNBUF);
1880 error = setfmode(nd->ni_vp, mode);
1881 vrele(nd->ni_vp);
1882 return error;
1883}
1884
984263bc 1885/*
41c20dac
MD
1886 * chmod_args(char *path, int mode)
1887 *
984263bc
MD
1888 * Change mode of a file given path name.
1889 */
984263bc
MD
1890/* ARGSUSED */
1891int
41c20dac 1892chmod(struct chmod_args *uap)
984263bc 1893{
dadab5e9 1894 struct thread *td = curthread;
984263bc 1895 struct nameidata nd;
9697c509 1896 int error;
984263bc 1897
9697c509
DRJ
1898 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, uap->path, td);
1899
1900 error = kern_chmod(&nd, uap->mode);
1901
1902 return (error);
984263bc
MD
1903}
1904
1905/*
41c20dac
MD
1906 * lchmod_args(char *path, int mode)
1907 *
984263bc
MD
1908 * Change mode of a file given path name (don't follow links.)
1909 */
984263bc
MD
1910/* ARGSUSED */
1911int
41c20dac 1912lchmod(struct lchmod_args *uap)
984263bc 1913{
dadab5e9 1914 struct thread *td = curthread;
984263bc
MD
1915 int error;
1916 struct nameidata nd;
1917
6fc0e645 1918 NDINIT(&nd, NAMEI_LOOKUP, 0, UIO_USERSPACE, SCARG(uap, path), td);
984263bc
MD
1919 if ((error = namei(&nd)) != 0)
1920 return (error);
1921 NDFREE(&nd, NDF_ONLY_PNBUF);
41c20dac 1922 error = setfmode(nd.ni_vp, SCARG(uap, mode));
984263bc
MD
1923 vrele(nd.ni_vp);
1924 return error;
1925}
1926
1927/*
41c20dac
MD
1928 * fchmod_args(int fd, int mode)
1929 *
984263bc
MD
1930 * Change mode of a file given a file descriptor.
1931 */
984263bc
MD
1932/* ARGSUSED */
1933int
41c20dac 1934fchmod(struct fchmod_args *uap)
984263bc 1935{
dadab5e9
MD
1936 struct thread *td = curthread;
1937 struct proc *p = td->td_proc;
984263bc
MD
1938 struct file *fp;
1939 int error;
1940
1941 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
1942 return (error);
41c20dac 1943 return setfmode((struct vnode *)fp->f_data, SCARG(uap, mode));
984263bc
MD
1944}
1945
1946static int
41c20dac 1947setfown(struct vnode *vp, uid_t uid, gid_t gid)
984263bc 1948{
dadab5e9
MD
1949 struct thread *td = curthread;
1950 struct proc *p = td->td_proc;
984263bc
MD
1951 int error;
1952 struct vattr vattr;
1953
dadab5e9
MD
1954 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
1955 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1956 VATTR_NULL(&vattr);
1957 vattr.va_uid = uid;
1958 vattr.va_gid = gid;
dadab5e9
MD
1959 error = VOP_SETATTR(vp, &vattr, p->p_ucred, td);
1960 VOP_UNLOCK(vp, 0, td);
984263bc
MD
1961 return error;
1962}
1963
9697c509
DRJ
1964int
1965kern_chown(struct nameidata *nd, int uid, int gid)
1966{
1967 int error;
1968
1969 error = namei(nd);
1970 if (error)
1971 return (error);
1972 NDFREE(nd, NDF_ONLY_PNBUF);
1973 error = setfown(nd->ni_vp, uid, gid);
1974 vrele(nd->ni_vp);
1975 return (error);
1976}
1977
984263bc 1978/*
41c20dac
MD
1979 * chown(char *path, int uid, int gid)
1980 *
984263bc
MD
1981 * Set ownership given a path name.
1982 */
984263bc 1983int
41c20dac 1984chown(struct chown_args *uap)
984263bc 1985{
dadab5e9 1986 struct thread *td = curthread;
984263bc 1987 struct nameidata nd;
9697c509
DRJ
1988 int error;
1989
1990 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, uap->path, td);
1991
1992 error = kern_chown(&nd, uap->uid, uap->gid);
984263bc 1993
984263bc
MD
1994 return (error);
1995}
1996
1997/*
41c20dac
MD
1998 * lchown_args(char *path, int uid, int gid)
1999 *
984263bc
MD
2000 * Set ownership given a path name, do not cross symlinks.
2001 */
984263bc 2002int
41c20dac 2003lchown(struct lchown_args *uap)
984263bc 2004{
dadab5e9 2005 struct thread *td = curthread;
984263bc
MD
2006 int error;
2007 struct nameidata nd;
2008
9697c509
DRJ
2009 NDINIT(&nd, NAMEI_LOOKUP, 0, UIO_USERSPACE, uap->path, td);
2010
2011 error = kern_chown(&nd, uap->uid, uap->gid);
2012
984263bc
MD
2013 return (error);
2014}
2015
2016/*
41c20dac
MD
2017 * fchown_args(int fd, int uid, int gid)
2018 *
984263bc
MD
2019 * Set ownership given a file descriptor.
2020 */
984263bc
MD
2021/* ARGSUSED */
2022int
41c20dac 2023fchown(struct fchown_args *uap)
984263bc 2024{
dadab5e9
MD
2025 struct thread *td = curthread;
2026 struct proc *p = td->td_proc;
984263bc
MD
2027 struct file *fp;
2028 int error;
2029
2030 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2031 return (error);
41c20dac 2032 return setfown((struct vnode *)fp->f_data,
984263bc
MD
2033 SCARG(uap, uid), SCARG(uap, gid));
2034}
2035
2036static int
9697c509 2037getutimes(const struct timeval *tvp, struct timespec *tsp)
984263bc
MD
2038{
2039 struct timeval tv[2];
984263bc 2040
9697c509 2041 if (tvp == NULL) {
984263bc
MD
2042 microtime(&tv[0]);
2043 TIMEVAL_TO_TIMESPEC(&tv[0], &tsp[0]);
2044 tsp[1] = tsp[0];
2045 } else {
9697c509
DRJ
2046 TIMEVAL_TO_TIMESPEC(&tvp[0], &tsp[0]);
2047 TIMEVAL_TO_TIMESPEC(&tvp[1], &tsp[1]);
984263bc
MD
2048 }
2049 return 0;
2050}
2051
2052static int
41c20dac 2053setutimes(struct vnode *vp, const struct timespec *ts, int nullflag)
984263bc 2054{
dadab5e9
MD
2055 struct thread *td = curthread;
2056 struct proc *p = td->td_proc;
984263bc
MD
2057 int error;
2058 struct vattr vattr;
2059
dadab5e9
MD
2060 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
2061 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
2062 VATTR_NULL(&vattr);
2063 vattr.va_atime = ts[0];
2064 vattr.va_mtime = ts[1];
2065 if (nullflag)
2066 vattr.va_vaflags |= VA_UTIMES_NULL;
dadab5e9
MD
2067 error = VOP_SETATTR(vp, &vattr, p->p_ucred, td);
2068 VOP_UNLOCK(vp, 0, td);
984263bc
MD
2069 return error;
2070}
2071
9697c509
DRJ
2072int
2073kern_utimes(struct nameidata *nd, struct timeval *tptr)
2074{
2075 struct timespec ts[2];
2076 int error;
2077
2078 error = getutimes(tptr, ts);
2079 if (error)
2080 return (error);
2081 error = namei(nd);
2082 if (error)
2083 return (error);
2084 NDFREE(nd, NDF_ONLY_PNBUF);
2085 error = setutimes(nd->ni_vp, ts, tptr == NULL);
2086 vrele(nd->ni_vp);
2087 return (error);
2088}
2089
984263bc 2090/*
41c20dac
MD
2091 * utimes_args(char *path, struct timeval *tptr)
2092 *
984263bc
MD
2093 * Set the access and modification times of a file.
2094 */
984263bc 2095int
41c20dac 2096utimes(struct utimes_args *uap)
984263bc 2097{
dadab5e9 2098 struct thread *td = curthread;
9697c509 2099 struct timeval tv[2];
984263bc 2100 struct nameidata nd;
9697c509
DRJ
2101 int error;
2102
2103 if (uap->tptr) {
2104 error = copyin(uap->tptr, tv, sizeof(tv));
2105 if (error)
2106 return (error);
2107 }
2108 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, uap->path, td);
2109
b651c485 2110 error = kern_utimes(&nd, uap->tptr ? tv : NULL);
984263bc 2111
984263bc
MD
2112 return (error);
2113}
2114
2115/*
41c20dac
MD
2116 * lutimes_args(char *path, struct timeval *tptr)
2117 *
984263bc
MD
2118 * Set the access and modification times of a file.
2119 */
984263bc 2120int
41c20dac 2121lutimes(struct lutimes_args *uap)
984263bc 2122{
dadab5e9 2123 struct thread *td = curthread;
9697c509 2124 struct timeval tv[2];
984263bc 2125 struct nameidata nd;
9697c509
DRJ
2126 int error;
2127
2128 if (uap->tptr) {
2129 error = copyin(uap->tptr, tv, sizeof(tv));
2130 if (error)
2131 return (error);
2132 }
2133 NDINIT(&nd, NAMEI_LOOKUP, 0, UIO_USERSPACE, uap->path, td);
2134
b651c485 2135 error = kern_utimes(&nd, uap->tptr ? tv : NULL);
984263bc 2136
984263bc
MD
2137 return (error);
2138}
2139
984263bc 2140int
9697c509 2141kern_futimes(int fd, struct timeval *tptr)
984263bc 2142{
dadab5e9
MD
2143 struct thread *td = curthread;
2144 struct proc *p = td->td_proc;
984263bc
MD
2145 struct timespec ts[2];
2146 struct file *fp;
984263bc
MD
2147 int error;
2148
9697c509
DRJ
2149 error = getutimes(tptr, ts);
2150 if (error)
984263bc 2151 return (error);
9697c509
DRJ
2152 error = getvnode(p->p_fd, fd, &fp);
2153 if (error)
984263bc 2154 return (error);
9697c509
DRJ
2155 error = setutimes((struct vnode *)fp->f_data, ts, tptr == NULL);
2156 return (error);
984263bc
MD
2157}
2158
2159/*
9697c509 2160 * futimes_args(int fd, struct timeval *tptr)
41c20dac 2161 *
9697c509 2162 * Set the access and modification times of a file.
984263bc 2163 */
984263bc 2164int
9697c509
DRJ
2165futimes(struct futimes_args *uap)
2166{
2167 struct timeval tv[2];
2168 int error;
2169
2170 if (uap->tptr) {
2171 error = copyin(uap->tptr, tv, sizeof(tv));
2172 if (error)
2173 return (error);
2174 }
2175
b651c485 2176 error = kern_futimes(uap->fd, uap->tptr ? tv : NULL);
9697c509
DRJ
2177
2178 return (error);
2179}
2180
2181int
2182kern_truncate(struct nameidata* nd, off_t length)
984263bc 2183{
dadab5e9
MD
2184 struct thread *td = curthread;
2185 struct proc *p = td->td_proc;
41c20dac 2186 struct vnode *vp;
984263bc
MD
2187 struct vattr vattr;
2188 int error;
984263bc 2189
9697c509 2190 if (length < 0)
984263bc 2191 return(EINVAL);
9697c509 2192 if ((error = namei(nd)) != 0)
984263bc 2193 return (error);
9697c509
DRJ
2194 vp = nd->ni_vp;
2195 NDFREE(nd, NDF_ONLY_PNBUF);
dadab5e9
MD
2196 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
2197 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
2198 if (vp->v_type == VDIR)
2199 error = EISDIR;
2200 else if ((error = vn_writechk(vp)) == 0 &&
dadab5e9 2201 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, td)) == 0) {
984263bc 2202 VATTR_NULL(&vattr);
9697c509 2203 vattr.va_size = length;
dadab5e9 2204 error = VOP_SETATTR(vp, &vattr, p->p_ucred, td);
984263bc
MD
2205 }
2206 vput(vp);
2207 return (error);
2208}
2209
9697c509
DRJ
2210/*
2211 * truncate(char *path, int pad, off_t length)
2212 *
2213 * Truncate a file given its path name.
2214 */
2215int
2216truncate(struct truncate_args *uap)
2217{
2218 struct thread *td = curthread;
2219 struct nameidata nd;
2220 int error;
2221
2222 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, uap->path, td);
2223
2224 error = kern_truncate(&nd, uap->length);
2225
2226 return error;
2227}
2228
984263bc 2229int
8f6f8622 2230kern_ftruncate(int fd, off_t length)
984263bc 2231{
dadab5e9
MD
2232 struct thread *td = curthread;
2233 struct proc *p = td->td_proc;
984263bc
MD
2234 struct vattr vattr;
2235 struct vnode *vp;
2236 struct file *fp;
2237 int error;
2238
8f6f8622 2239 if (length < 0)
984263bc 2240 return(EINVAL);
8f6f8622 2241 if ((error = getvnode(p->p_fd, fd, &fp)) != 0)
984263bc
MD
2242 return (error);
2243 if ((fp->f_flag & FWRITE) == 0)
2244 return (EINVAL);
2245 vp = (struct vnode *)fp->f_data;
dadab5e9
MD
2246 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
2247 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
2248 if (vp->v_type == VDIR)
2249 error = EISDIR;
2250 else if ((error = vn_writechk(vp)) == 0) {
2251 VATTR_NULL(&vattr);
8f6f8622 2252 vattr.va_size = length;
dadab5e9 2253 error = VOP_SETATTR(vp, &vattr, fp->f_cred, td);
984263bc 2254 }
dadab5e9 2255 VOP_UNLOCK(vp, 0, td);
984263bc
MD
2256 return (error);
2257}
2258
984263bc 2259/*
8f6f8622 2260 * ftruncate_args(int fd, int pad, off_t length)
41c20dac 2261 *
8f6f8622 2262 * Truncate a file given a file descriptor.
984263bc 2263 */
984263bc 2264int
8f6f8622 2265ftruncate(struct ftruncate_args *uap)
984263bc 2266{
8f6f8622 2267 int error;
984263bc 2268
8f6f8622
DRJ
2269 error = kern_ftruncate(uap->fd, uap->length);
2270
2271 return (error);
984263bc
MD
2272}
2273
984263bc 2274/*
41c20dac
MD
2275 * fsync(int fd)
2276 *
984263bc
MD
2277 * Sync an open file.
2278 */
984263bc
MD
2279/* ARGSUSED */
2280int
41c20dac 2281fsync(struct fsync_args *uap)
984263bc 2282{
dadab5e9
MD
2283 struct thread *td = curthread;
2284 struct proc *p = td->td_proc;
41c20dac 2285 struct vnode *vp;
984263bc
MD
2286 struct file *fp;
2287 vm_object_t obj;
2288 int error;
2289
2290 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
2291 return (error);
2292 vp = (struct vnode *)fp->f_data;
dadab5e9 2293 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
2294 if (VOP_GETVOBJECT(vp, &obj) == 0)
2295 vm_object_page_clean(obj, 0, 0, 0);
3b568787 2296 if ((error = VOP_FSYNC(vp, MNT_WAIT, td)) == 0 &&
984263bc
MD
2297 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP) &&
2298 bioops.io_fsync)
2299 error = (*bioops.io_fsync)(vp);
dadab5e9 2300 VOP_UNLOCK(vp, 0, td);
984263bc
MD
2301 return (error);
2302}
2303
984263bc 2304int
9697c509 2305kern_rename(struct nameidata *fromnd, struct nameidata *tond)
984263bc 2306{
dadab5e9
MD
2307 struct thread *td = curthread;
2308 struct proc *p = td->td_proc;
41c20dac 2309 struct vnode *tvp, *fvp, *tdvp;
984263bc
MD
2310 int error;
2311
2312 bwillwrite();
9697c509
DRJ
2313 error = namei(fromnd);
2314 if (error)
984263bc 2315 return (error);
9697c509
DRJ
2316 fvp = fromnd->ni_vp;
2317 if (fromnd->ni_vp->v_type == VDIR)
2318 tond->ni_cnd.cn_flags |= CNP_WILLBEDIR;
2319 error = namei(tond);
2320 if (error) {
984263bc
MD
2321 /* Translate error code for rename("dir1", "dir2/."). */
2322 if (error == EISDIR && fvp->v_type == VDIR)
2323 error = EINVAL;
9697c509
DRJ
2324 NDFREE(fromnd, NDF_ONLY_PNBUF);
2325 vrele(fromnd->ni_dvp);
984263bc
MD
2326 vrele(fvp);
2327 goto out1;
2328 }
9697c509
DRJ
2329 tdvp = tond->ni_dvp;
2330 tvp = tond->ni_vp;
984263bc
MD
2331 if (tvp != NULL) {
2332 if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
2333 error = ENOTDIR;
2334 goto out;
2335 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
2336 error = EISDIR;
2337 goto out;
2338 }
2339 }
2340 if (fvp == tdvp)
2341 error = EINVAL;
2342 /*
2343 * If the source is the same as the destination (that is, if they
2344 * are links to the same vnode), then there is nothing to do.
2345 */
2346 if (fvp == tvp)
2347 error = -1;
2348out:
2349 if (!error) {
dadab5e9 2350 VOP_LEASE(tdvp, td, p->p_ucred, LEASE_WRITE);
9697c509
DRJ
2351 if (fromnd->ni_dvp != tdvp) {
2352 VOP_LEASE(fromnd->ni_dvp, td, p->p_ucred, LEASE_WRITE);
984263bc
MD
2353 }
2354 if (tvp) {
dadab5e9 2355 VOP_LEASE(tvp, td, p->p_ucred, LEASE_WRITE);
984263bc 2356 }
9697c509
DRJ
2357 error = VOP_RENAME(fromnd->ni_dvp, NCPNULL, fromnd->ni_vp,
2358 &fromnd->ni_cnd, tond->ni_dvp, NCPNULL, tond->ni_vp,
2359 &tond->ni_cnd);
2360 NDFREE(fromnd, NDF_ONLY_PNBUF);
2361 NDFREE(tond, NDF_ONLY_PNBUF);
984263bc 2362 } else {
9697c509
DRJ
2363 NDFREE(fromnd, NDF_ONLY_PNBUF);
2364 NDFREE(tond, NDF_ONLY_PNBUF);
984263bc
MD
2365 if (tdvp == tvp)
2366 vrele(tdvp);
2367 else
2368 vput(tdvp);
2369 if (tvp)
2370 vput(tvp);
9697c509 2371 vrele(fromnd->ni_dvp);
984263bc
MD
2372 vrele(fvp);
2373 }
9697c509
DRJ
2374 vrele(tond->ni_startdir);
2375 ASSERT_VOP_UNLOCKED(fromnd->ni_dvp, "rename");
2376 ASSERT_VOP_UNLOCKED(fromnd->ni_vp, "rename");
2377 ASSERT_VOP_UNLOCKED(tond->ni_dvp, "rename");
2378 ASSERT_VOP_UNLOCKED(tond->ni_vp, "rename");
984263bc 2379out1:
9697c509
DRJ
2380 if (fromnd->ni_startdir)
2381 vrele(fromnd->ni_startdir);
984263bc
MD
2382 if (error == -1)
2383 return (0);
2384 return (error);
2385}
2386
2387/*
9697c509 2388 * rename_args(char *from, char *to)
41c20dac 2389 *
9697c509
DRJ
2390 * Rename files. Source and destination must either both be directories,
2391 * or both not be directories. If target is a directory, it must be empty.
984263bc 2392 */
984263bc 2393int
9697c509
DRJ
2394rename(struct rename_args *uap)
2395{
2396 struct thread *td = curthread;
2397 struct nameidata fromnd, tond;
2398 int error;
2399
2400 NDINIT(&fromnd, NAMEI_DELETE, CNP_WANTPARENT | CNP_SAVESTART,
2401 UIO_USERSPACE, uap->from, td);
2402 NDINIT(&tond, NAMEI_RENAME,
2403 CNP_LOCKPARENT | CNP_LOCKLEAF | CNP_NOCACHE |
2404 CNP_SAVESTART | CNP_NOOBJ,
2405 UIO_USERSPACE, uap->to, td);
2406
2407 error = kern_rename(&fromnd, &tond);
2408
2409 return (error);
2410}
2411
2412int
2413kern_mkdir(struct nameidata *nd, int mode)
984263bc 2414{
dadab5e9
MD
2415 struct thread *td = curthread;
2416 struct proc *p = td->td_proc;
41c20dac 2417 struct vnode *vp;
984263bc
MD
2418 struct vattr vattr;
2419 int error;
984263bc
MD
2420
2421 bwillwrite();
9697c509
DRJ
2422 nd->ni_cnd.cn_flags |= CNP_WILLBEDIR;
2423 error = namei(nd);
2424 if (error)
984263bc 2425 return (error);
9697c509
DRJ
2426 vp = nd->ni_vp;
2427 if (vp) {
2428 NDFREE(nd, NDF_ONLY_PNBUF);
2429 if (nd->ni_dvp == vp)
2430 vrele(nd->ni_dvp);
984263bc 2431 else
9697c509 2432 vput(nd->ni_dvp);
984263bc
MD
2433 vrele(vp);
2434 return (EEXIST);
2435 }
2436 VATTR_NULL(&vattr);
2437 vattr.va_type = VDIR;
9697c509
DRJ
2438 vattr.va_mode = (mode & ACCESSPERMS) &~ p->p_fd->fd_cmask;
2439 VOP_LEASE(nd->ni_dvp, td, p->p_ucred, LEASE_WRITE);
2440 error = VOP_MKDIR(nd->ni_dvp, NCPNULL, &nd->ni_vp, &nd->ni_cnd,
2441 &vattr);
2442 NDFREE(nd, NDF_ONLY_PNBUF);
2443 vput(nd->ni_dvp);
2444 if (error == 0)
2445 vput(nd->ni_vp);
2446 ASSERT_VOP_UNLOCKED(nd->ni_dvp, "mkdir");
2447 ASSERT_VOP_UNLOCKED(nd->ni_vp, "mkdir");
984263bc
MD
2448 return (error);
2449}
2450
2451/*
9697c509 2452 * mkdir_args(char *path, int mode)
41c20dac 2453 *
9697c509 2454 * Make a directory file.
984263bc 2455 */
984263bc
MD
2456/* ARGSUSED */
2457int
9697c509
DRJ
2458mkdir(struct mkdir_args *uap)
2459{
2460 struct thread *td = curthread;
2461 struct nameidata nd;
2462 int error;
2463
2464 NDINIT(&nd, NAMEI_CREATE, CNP_LOCKPARENT, UIO_USERSPACE, uap->path,
2465 td);
2466
2467 error = kern_mkdir(&nd, uap->mode);
2468
2469 return (error);
2470}
2471
2472int
2473kern_rmdir(struct nameidata *nd)
984263bc 2474{
dadab5e9
MD
2475 struct thread *td = curthread;
2476 struct proc *p = td->td_proc;
41c20dac 2477 struct vnode *vp;
984263bc 2478 int error;
984263bc
MD
2479
2480 bwillwrite();
9697c509
DRJ
2481 error = namei(nd);
2482 if (error)
984263bc 2483 return (error);
9697c509 2484 vp = nd->ni_vp;
984263bc
MD
2485 if (vp->v_type != VDIR) {
2486 error = ENOTDIR;
2487 goto out;
2488 }
2489 /*
2490 * No rmdir "." please.
2491 */
9697c509 2492 if (nd->ni_dvp == vp) {
984263bc
MD
2493 error = EINVAL;
2494 goto out;
2495 }
2496 /*
2497 * The root of a mounted filesystem cannot be deleted.
2498 */
2499 if (vp->v_flag & VROOT)
2500 error = EBUSY;
2501 else {
9697c509 2502 VOP_LEASE(nd->ni_dvp, td, p->p_ucred, LEASE_WRITE);
dadab5e9 2503 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
9697c509
DRJ
2504 error = VOP_RMDIR(nd->ni_dvp, NCPNULL, nd->ni_vp,
2505 &nd->ni_cnd);
984263bc
MD
2506 }
2507out:
9697c509
DRJ
2508 NDFREE(nd, NDF_ONLY_PNBUF);
2509 if (nd->ni_dvp == vp)
2510 vrele(nd->ni_dvp);
984263bc 2511 else
9697c509 2512 vput(nd->ni_dvp);
984263bc
MD
2513 if (vp != NULLVP)
2514 vput(vp);
9697c509
DRJ
2515 ASSERT_VOP_UNLOCKED(nd->ni_dvp, "rmdir");
2516 ASSERT_VOP_UNLOCKED(nd->ni_vp, "rmdir");
984263bc
MD
2517 return (error);
2518}
2519
984263bc 2520/*
9697c509 2521 * rmdir_args(char *path)
41c20dac 2522 *
9697c509 2523 * Remove a directory file.
984263bc 2524 */
9697c509 2525/* ARGSUSED */
984263bc 2526int
9697c509 2527rmdir(struct rmdir_args *uap)
984263bc 2528{
dadab5e9 2529 struct thread *td = curthread;
9697c509
DRJ
2530 struct nameidata nd;
2531 int error;
2532
2533 NDINIT(&nd, NAMEI_DELETE, CNP_LOCKPARENT | CNP_LOCKLEAF,
2534 UIO_USERSPACE, uap->path, td);
2535
2536 error = kern_rmdir(&nd);
984263bc 2537
984263bc
MD
2538 return (error);
2539}
984263bc 2540
984263bc 2541int
9697c509 2542kern_getdirentries(int fd, char *buf, u_int count, long *basep, int *res)
984263bc 2543{
dadab5e9
MD
2544 struct thread *td = curthread;
2545 struct proc *p = td->td_proc;
984263bc
MD
2546 struct vnode *vp;
2547 struct file *fp;
2548 struct uio auio;
2549 struct iovec aiov;
2550 long loff;
2551 int error, eofflag;
2552
9697c509 2553 if ((error = getvnode(p->p_fd, fd, &fp)) != 0)
984263bc
MD
2554 return (error);
2555 if ((fp->f_flag & FREAD) == 0)
2556 return (EBADF);
2557 vp = (struct vnode *)fp->f_data;
2558unionread:
2559 if (vp->v_type != VDIR)
2560 return (EINVAL);
9697c509
DRJ
2561 aiov.iov_base = buf;
2562 aiov.iov_len = count;
984263bc
MD
2563 auio.uio_iov = &aiov;
2564 auio.uio_iovcnt = 1;
2565 auio.uio_rw = UIO_READ;
2566 auio.uio_segflg = UIO_USERSPACE;
dadab5e9 2567 auio.uio_td = td;
9697c509 2568 auio.uio_resid = count;
dadab5e9
MD
2569 /* vn_lock(vp, LK_SHARED | LK_RETRY, td); */
2570 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
2571 loff = auio.uio_offset = fp->f_offset;
2572 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL);
2573 fp->f_offset = auio.uio_offset;
dadab5e9 2574 VOP_UNLOCK(vp, 0, td);
984263bc
MD
2575 if (error)
2576 return (error);
9697c509 2577 if (count == auio.uio_resid) {
984263bc 2578 if (union_dircheckp) {
dadab5e9 2579 error = union_dircheckp(td, &vp, fp);
984263bc
MD
2580 if (error == -1)
2581 goto unionread;
2582 if (error)
2583 return (error);
2584 }
2585 if ((vp->v_flag & VROOT) &&
2586 (vp->v_mount->mnt_flag & MNT_UNION)) {
2587 struct vnode *tvp = vp;
2588 vp = vp->v_mount->mnt_vnodecovered;
2589 VREF(vp);
2590 fp->f_data = (caddr_t) vp;
2591 fp->f_offset = 0;
2592 vrele(tvp);
2593 goto unionread;
2594 }
2595 }
9697c509
DRJ
2596 if (basep) {
2597 *basep = loff;
984263bc 2598 }
9697c509
DRJ
2599 *res = count - auio.uio_resid;
2600 return (error);
2601}
2602
2603/*
2604 * getdirentries_args(int fd, char *buf, u_int conut, long *basep)
2605 *
2606 * Read a block of directory entries in a file system independent format.
2607 */
2608int
2609getdirentries(struct getdirentries_args *uap)
2610{
2611 long base;
2612 int error;
2613
2614 error = kern_getdirentries(uap->fd, uap->buf, uap->count, &base,
2615 &uap->sysmsg_result);
2616
2617 if (error == 0)
2618 error = copyout(&base, uap->basep, sizeof(*uap->basep));
984263bc
MD
2619 return (error);
2620}
41c20dac
MD
2621
2622/*
2623 * getdents_args(int fd, char *buf, size_t count)
2624 */
984263bc 2625int
41c20dac 2626getdents(struct getdents_args *uap)
984263bc 2627{
9697c509
DRJ
2628 int error;
2629
2630 error = kern_getdirentries(uap->fd, uap->buf, uap->count, NULL,
2631 &uap->sysmsg_result);
41c20dac 2632
9697c509 2633 return (error);
984263bc
MD
2634}
2635
2636/*
41c20dac
MD
2637 * umask(int newmask)
2638 *
984263bc
MD
2639 * Set the mode mask for creation of filesystem nodes.
2640 *
2641 * MP SAFE
2642 */
984263bc 2643int
41c20dac 2644umask(struct umask_args *uap)
984263bc 2645{
dadab5e9
MD
2646 struct thread *td = curthread;
2647 struct proc *p = td->td_proc;
41c20dac 2648 struct filedesc *fdp;
984263bc
MD
2649
2650 fdp = p->p_fd;
c7114eea 2651 uap->sysmsg_result = fdp->fd_cmask;
984263bc
MD
2652 fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
2653 return (0);
2654}
2655
2656/*
41c20dac
MD
2657 * revoke(char *path)
2658 *
984263bc
MD
2659 * Void all references to file by ripping underlying filesystem
2660 * away from vnode.
2661 */
984263bc
MD
2662/* ARGSUSED */
2663int
41c20dac 2664revoke(struct revoke_args *uap)
984263bc 2665{
dadab5e9
MD
2666 struct thread *td = curthread;
2667 struct proc *p = td->td_proc;
41c20dac 2668 struct vnode *vp;
984263bc
MD
2669 struct vattr vattr;
2670 int error;
2671 struct nameidata nd;
2672
2b69e610 2673 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
984263bc
MD
2674 if ((error = namei(&nd)) != 0)
2675 return (error);
2676 vp = nd.ni_vp;
2677 NDFREE(&nd, NDF_ONLY_PNBUF);
2678 if (vp->v_type != VCHR && vp->v_type != VBLK) {
2679 error = EINVAL;
2680 goto out;
2681 }
3b568787 2682 if ((error = VOP_GETATTR(vp, &vattr, td)) != 0)
984263bc
MD
2683 goto out;
2684 if (p->p_ucred->cr_uid != vattr.va_uid &&
dadab5e9 2685 (error = suser_cred(p->p_ucred, PRISON_ROOT)))
984263bc
MD
2686 goto out;
2687 if (vcount(vp) > 1)
2688 VOP_REVOKE(vp, REVOKEALL);
2689out:
2690 vrele(vp);
2691 return (error);
2692}
2693
2694/*
2695 * Convert a user file descriptor to a kernel file entry.
2696 */
2697int
41c20dac 2698getvnode(struct filedesc *fdp, int fd, struct file **fpp)
984263bc
MD
2699{
2700 struct file *fp;
2701
2702 if ((u_int)fd >= fdp->fd_nfiles ||
2703 (fp = fdp->fd_ofiles[fd]) == NULL)
2704 return (EBADF);
2705 if (fp->f_type != DTYPE_VNODE && fp->f_type != DTYPE_FIFO)
2706 return (EINVAL);
2707 *fpp = fp;
2708 return (0);
2709}
2710/*
41c20dac
MD
2711 * getfh_args(char *fname, fhandle_t *fhp)
2712 *
984263bc
MD
2713 * Get (NFS) file handle
2714 */
984263bc 2715int
41c20dac 2716getfh(struct getfh_args *uap)
984263bc 2717{
dadab5e9 2718 struct thread *td = curthread;
984263bc
MD
2719 struct nameidata nd;
2720 fhandle_t fh;
41c20dac 2721 struct vnode *vp;
984263bc
MD
2722 int error;
2723
2724 /*
2725 * Must be super user
2726 */
dadab5e9 2727 error = suser(td);
984263bc
MD
2728 if (error)
2729 return (error);
2b69e610 2730 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE, uap->fname, td);
984263bc
MD
2731 error = namei(&nd);
2732 if (error)
2733 return (error);
2734 NDFREE(&nd, NDF_ONLY_PNBUF);
2735 vp = nd.ni_vp;
2736 bzero(&fh, sizeof(fh));
2737 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
2738 error = VFS_VPTOFH(vp, &fh.fh_fid);
2739 vput(vp);
2740 if (error)
2741 return (error);
2742 error = copyout(&fh, uap->fhp, sizeof (fh));
2743 return (error);
2744}
2745
2746/*
41c20dac
MD
2747 * fhopen_args(const struct fhandle *u_fhp, int flags)
2748 *
984263bc
MD
2749 * syscall for the rpc.lockd to use to translate a NFS file handle into
2750 * an open descriptor.
2751 *
2752 * warning: do not remove the suser() call or this becomes one giant
2753 * security hole.
2754 */
984263bc 2755int
41c20dac 2756fhopen(struct fhopen_args *uap)
984263bc 2757{
dadab5e9
MD
2758 struct thread *td = curthread;
2759 struct proc *p = td->td_proc;
984263bc
MD
2760 struct mount *mp;
2761 struct vnode *vp;
2762 struct fhandle fhp;
2763 struct vattr vat;
2764 struct vattr *vap = &vat;
2765 struct flock lf;
2766 struct file *fp;
41c20dac 2767 struct filedesc *fdp = p->p_fd;
984263bc
MD
2768 int fmode, mode, error, type;
2769 struct file *nfp;
2770 int indx;
2771
2772 /*
2773 * Must be super user
2774 */
dadab5e9 2775 error = suser(td);
984263bc
MD
2776 if (error)
2777 return (error);
2778
2779 fmode = FFLAGS(SCARG(uap, flags));
2780 /* why not allow a non-read/write open for our lockd? */
2781 if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT))
2782 return (EINVAL);
2783 error = copyin(SCARG(uap,u_fhp), &fhp, sizeof(fhp));
2784 if (error)
2785 return(error);
2786 /* find the mount point */
2787 mp = vfs_getvfs(&fhp.fh_fsid);
2788 if (mp == NULL)
2789 return (ESTALE);
2790 /* now give me my vnode, it gets returned to me locked */
2791 error = VFS_FHTOVP(mp, &fhp.fh_fid, &vp);
2792 if (error)
2793 return (error);
2794 /*
2795 * from now on we have to make sure not
2796 * to forget about the vnode
2797 * any error that causes an abort must vput(vp)
2798 * just set error = err and 'goto bad;'.
2799 */
2800
2801 /*
2802 * from vn_open
2803 */
2804 if (vp->v_type == VLNK) {
2805 error = EMLINK;
2806 goto bad;
2807 }
2808 if (vp->v_type == VSOCK) {
2809 error = EOPNOTSUPP;
2810 goto bad;
2811 }
2812 mode = 0;
2813 if (fmode & (FWRITE | O_TRUNC)) {
2814 if (vp->v_type == VDIR) {
2815 error = EISDIR;
2816 goto bad;
2817 }
2818 error = vn_writechk(vp);
2819 if (error)
2820 goto bad;
2821 mode |= VWRITE;
2822 }
2823 if (fmode & FREAD)
2824 mode |= VREAD;
2825 if (mode) {
dadab5e9 2826 error = VOP_ACCESS(vp, mode, p->p_ucred, td);
984263bc
MD
2827 if (error)
2828 goto bad;
2829 }
2830 if (fmode & O_TRUNC) {
dadab5e9
MD
2831 VOP_UNLOCK(vp, 0, td); /* XXX */
2832 VOP_LEASE(vp, td, p->p_ucred, LEASE_WRITE);
2833 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); /* XXX */
984263bc
MD
2834 VATTR_NULL(vap);
2835 vap->va_size = 0;
dadab5e9 2836 error = VOP_SETATTR(vp, vap, p->p_ucred, td);
984263bc
MD
2837 if (error)
2838 goto bad;
2839 }
dadab5e9 2840 error = VOP_OPEN(vp, fmode, p->p_ucred, td);
984263bc
MD
2841 if (error)
2842 goto bad;
2843 /*
2844 * Make sure that a VM object is created for VMIO support.
2845 */
2846 if (vn_canvmio(vp) == TRUE) {
3b568787 2847 if ((error = vfs_object_create(vp, td)) != 0)
984263bc
MD
2848 goto bad;
2849 }
2850 if (fmode & FWRITE)
2851 vp->v_writecount++;
2852
2853 /*
2854 * end of vn_open code
2855 */
2856
2857 if ((error = falloc(p, &nfp, &indx)) != 0) {
2858 if (fmode & FWRITE)
2859 vp->v_writecount--;
2860 goto bad;
2861 }
2862 fp = nfp;
2863
2864 /*
2865 * hold an extra reference to avoid having fp ripped out
2866 * from under us while we block in the lock op.
2867 */
2868 fhold(fp);
2869 nfp->f_data = (caddr_t)vp;
2870 nfp->f_flag = fmode & FMASK;
2871 nfp->f_ops = &vnops;
2872 nfp->f_type = DTYPE_VNODE;
2873 if (fmode & (O_EXLOCK | O_SHLOCK)) {
2874 lf.l_whence = SEEK_SET;
2875 lf.l_start = 0;
2876 lf.l_len = 0;
2877 if (fmode & O_EXLOCK)
2878 lf.l_type = F_WRLCK;
2879 else
2880 lf.l_type = F_RDLCK;
2881 type = F_FLOCK;
2882 if ((fmode & FNONBLOCK) == 0)
2883 type |= F_WAIT;
dadab5e9 2884 VOP_UNLOCK(vp, 0, td);
984263bc
MD
2885 if ((error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) != 0) {
2886 /*
2887 * lock request failed. Normally close the descriptor
2888 * but handle the case where someone might have dup()d
2889 * or close()d it when we weren't looking.
2890 */
2891 if (fdp->fd_ofiles[indx] == fp) {
2892 fdp->fd_ofiles[indx] = NULL;
dadab5e9 2893 fdrop(fp, td);
984263bc
MD
2894 }
2895
2896 /*
2897 * release our private reference.
2898 */
dadab5e9 2899 fdrop(fp, td);
984263bc
MD
2900 return (error);
2901 }
dadab5e9 2902 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
2903 fp->f_flag |= FHASLOCK;
2904 }
2905 if ((vp->v_type == VREG) && (VOP_GETVOBJECT(vp, NULL) != 0))
3b568787 2906 vfs_object_create(vp, td);
984263bc 2907
dadab5e9
MD
2908 VOP_UNLOCK(vp, 0, td);
2909 fdrop(fp, td);
c7114eea 2910 uap->sysmsg_result = indx;
984263bc
MD
2911 return (0);
2912
2913bad:
2914 vput(vp);
2915 return (error);
2916}
2917
41c20dac
MD
2918/*
2919 * fhstat_args(struct fhandle *u_fhp, struct stat *sb)
2920 */
984263bc 2921int
41c20dac 2922fhstat(struct fhstat_args *uap)
984263bc 2923{
dadab5e9 2924 struct thread *td = curthread;
984263bc
MD
2925 struct stat sb;
2926 fhandle_t fh;
2927 struct mount *mp;
2928 struct vnode *vp;
2929 int error;
2930
2931 /*
2932 * Must be super user
2933 */
dadab5e9 2934 error = suser(td);
984263bc
MD
2935 if (error)
2936 return (error);
2937
2938 error = copyin(SCARG(uap, u_fhp), &fh, sizeof(fhandle_t));
2939 if (error)
2940 return (error);
2941
2942 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
2943 return (ESTALE);
2944 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
2945 return (error);
dadab5e9 2946 error = vn_stat(vp, &sb, td);
984263bc
MD
2947 vput(vp);
2948 if (error)
2949 return (error);
2950 error = copyout(&sb, SCARG(uap, sb), sizeof(sb));
2951 return (error);
2952}
2953
41c20dac
MD
2954/*
2955 * fhstatfs_args(struct fhandle *u_fhp, struct statfs *buf)
2956 */
984263bc 2957int
41c20dac 2958fhstatfs(struct fhstatfs_args *uap)
984263bc 2959{
dadab5e9 2960 struct thread *td = curthread;
984263bc
MD
2961 struct statfs *sp;
2962 struct mount *mp;
2963 struct vnode *vp;
2964 struct statfs sb;
2965 fhandle_t fh;
2966 int error;
2967
2968 /*
2969 * Must be super user
2970 */
dadab5e9 2971 if ((error = suser(td)))
984263bc
MD
2972 return (error);
2973
2974 if ((error = copyin(SCARG(uap, u_fhp), &fh, sizeof(fhandle_t))) != 0)
2975 return (error);
2976
2977 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
2978 return (ESTALE);
2979 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
2980 return (error);
2981 mp = vp->v_mount;
2982 sp = &mp->mnt_stat;
2983 vput(vp);
dadab5e9 2984 if ((error = VFS_STATFS(mp, sp, td)) != 0)
984263bc
MD
2985 return (error);
2986 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
dadab5e9 2987 if (suser(td)) {
984263bc
MD
2988 bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
2989 sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
2990 sp = &sb;
2991 }
2992 return (copyout(sp, SCARG(uap, buf), sizeof(*sp)));
2993}
2994
2995/*
2996 * Syscall to push extended attribute configuration information into the
2997 * VFS. Accepts a path, which it converts to a mountpoint, as well as
2998 * a command (int cmd), and attribute name and misc data. For now, the
2999 * attribute name is left in userspace for consumption by the VFS_op.
3000 * It will probably be changed to be copied into sysspace by the
3001 * syscall in the future, once issues with various consumers of the
3002 * attribute code have raised their hands.
3003 *
3004 * Currently this is used only by UFS Extended Attributes.
3005 */
3006int
41c20dac 3007extattrctl(struct extattrctl_args *uap)
984263bc 3008{
dadab5e9 3009 struct thread *td = curthread;
984263bc
MD
3010 struct nameidata nd;
3011 struct mount *mp;
3012 int error;
3013
2b69e610 3014 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, SCARG(uap, path), td);
984263bc
MD
3015 if ((error = namei(&nd)) != 0)
3016 return (error);
3017 mp = nd.ni_vp->v_mount;
3018 NDFREE(&nd, 0);
3019 return (VFS_EXTATTRCTL(mp, SCARG(uap, cmd), SCARG(uap, attrname),
dadab5e9 3020 SCARG(uap, arg), td));
984263bc
MD
3021}
3022
3023/*
3024 * Syscall to set a named extended attribute on a file or directory.
3025 * Accepts attribute name, and a uio structure pointing to the data to set.
3026 * The uio is consumed in the style of writev(). The real work happens
3027 * in VOP_SETEXTATTR().
3028 */
3029int
41c20dac 3030extattr_set_file(struct extattr_set_file_args *uap)
984263bc 3031{
dadab5e9
MD
3032 struct thread *td = curthread;
3033 struct proc *p = td->td_proc;
984263bc
MD
3034 struct nameidata nd;
3035 struct uio auio;
3036 struct iovec *iov, *needfree = NULL, aiov[UIO_SMALLIOV];
3037 char attrname[EXTATTR_MAXNAMELEN];
3038 u_int iovlen, cnt;
3039 int error, i;
3040
3041 error = copyin(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN);
3042 if (error)
3043 return (error);
2b69e610 3044 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
dadab5e9 3045 SCARG(uap, path), td);
984263bc
MD
3046 if ((error = namei(&nd)) != 0)
3047 return(error);
3048 iovlen = uap->iovcnt * sizeof(struct iovec);
3049 if (uap->iovcnt > UIO_SMALLIOV) {
3050 if (uap->iovcnt > UIO_MAXIOV) {
3051 error = EINVAL;
3052 goto done;
3053 }
3054 MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
3055 needfree = iov;
3056 } else
3057 iov = aiov;
3058 auio.uio_iov = iov;
3059 auio.uio_iovcnt = uap->iovcnt;
3060 auio.uio_rw = UIO_WRITE;
3061 auio.uio_segflg = UIO_USERSPACE;
dadab5e9 3062 auio.uio_td = td;
984263bc
MD
3063 auio.uio_offset = 0;
3064 if ((error = copyin((caddr_t)uap->iovp, (caddr_t)iov, iovlen)))
3065 goto done;
3066 auio.uio_resid = 0;
3067 for (i = 0; i < uap->iovcnt; i++) {
3068 if (iov->iov_len > INT_MAX - auio.uio_resid) {
3069 error = EINVAL;
3070 goto done;
3071 }
3072 auio.uio_resid += iov->iov_len;
3073 iov++;
3074 }
3075 cnt = auio.uio_resid;
dadab5e9 3076 error = VOP_SETEXTATTR(nd.ni_vp, attrname, &auio, p->p_ucred, td);
984263bc 3077 cnt -= auio.uio_resid;
c7114eea 3078 uap->sysmsg_result = cnt;
984263bc
MD
3079done:
3080 if (needfree)
3081 FREE(needfree, M_IOV);
3082 NDFREE(&nd, 0);
3083 return (error);
3084}
3085
3086/*
3087 * Syscall to get a named extended attribute on a file or directory.
3088 * Accepts attribute name, and a uio structure pointing to a buffer for the
3089 * data. The uio is consumed in the style of readv(). The real work
3090 * happens in VOP_GETEXTATTR();
3091 */
3092int
41c20dac 3093extattr_get_file(struct extattr_get_file_args *uap)
984263bc 3094{
dadab5e9
MD
3095 struct thread *td = curthread;
3096 struct proc *p = td->td_proc;
984263bc
MD
3097 struct nameidata nd;
3098 struct uio auio;
3099 struct iovec *iov, *needfree, aiov[UIO_SMALLIOV];
3100 char attrname[EXTATTR_MAXNAMELEN];
3101 u_int iovlen, cnt;
3102 int error, i;
3103
3104 error = copyin(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN);
3105 if (error)
3106 return (error);
2b69e610 3107 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
dadab5e9 3108 SCARG(uap, path), td);
984263bc
MD
3109 if ((error = namei(&nd)) != 0)
3110 return (error);
3111 iovlen = uap->iovcnt * sizeof (struct iovec);
3112 if (uap->iovcnt > UIO_SMALLIOV) {
3113 if (uap->iovcnt > UIO_MAXIOV) {
3114 NDFREE(&nd, 0);
3115 return (EINVAL);
3116 }
3117 MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
3118 needfree = iov;
3119 } else {
3120 iov = aiov;
3121 needfree = NULL;
3122 }
3123 auio.uio_iov = iov;
3124 auio.uio_iovcnt = uap->iovcnt;
3125 auio.uio_rw = UIO_READ;
3126 auio.uio_segflg = UIO_USERSPACE;
dadab5e9 3127 auio.uio_td = td;
984263bc
MD
3128 auio.uio_offset = 0;
3129 if ((error = copyin((caddr_t)uap->iovp, (caddr_t)iov, iovlen)))
3130 goto done;
3131 auio.uio_resid = 0;
3132 for (i = 0; i < uap->iovcnt; i++) {
3133 if (iov->iov_len > INT_MAX - auio.uio_resid) {
3134 error = EINVAL;
3135 goto done;
3136 }
3137 auio.uio_resid += iov->iov_len;
3138 iov++;
3139 }
3140 cnt = auio.uio_resid;
dadab5e9 3141 error = VOP_GETEXTATTR(nd.ni_vp, attrname, &auio, p->p_ucred, td);
984263bc 3142 cnt -= auio.uio_resid;
c7114eea 3143 uap->sysmsg_result = cnt;
984263bc
MD
3144done:
3145 if (needfree)
3146 FREE(needfree, M_IOV);
3147 NDFREE(&nd, 0);
3148 return(error);
3149}
3150
3151/*
3152 * Syscall to delete a named extended attribute from a file or directory.
3153 * Accepts attribute name. The real work happens in VOP_SETEXTATTR().
3154 */
3155int
41c20dac 3156extattr_delete_file(struct extattr_delete_file_args *uap)
984263bc 3157{
dadab5e9
MD
3158 struct thread *td = curthread;
3159 struct proc *p = td->td_proc;
984263bc
MD
3160 struct nameidata nd;
3161 char attrname[EXTATTR_MAXNAMELEN];
3162 int error;
3163
3164 error = copyin(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN);
3165 if (error)
3166 return(error);
2b69e610 3167 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, UIO_USERSPACE,
dadab5e9 3168 SCARG(uap, path), td);
984263bc
MD
3169 if ((error = namei(&nd)) != 0)
3170 return(error);
dadab5e9 3171 error = VOP_SETEXTATTR(nd.ni_vp, attrname, NULL, p->p_ucred, td);
984263bc
MD
3172 NDFREE(&nd, 0);
3173 return(error);
3174}