vfs_syscalls.c revision 1.217.2.8
1 /* $NetBSD: vfs_syscalls.c,v 1.217.2.8 2005/12/29 00:57:09 riz Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.217.2.8 2005/12/29 00:57:09 riz Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_compat_43.h" 44 #include "opt_ktrace.h" 45 #include "opt_verified_exec.h" 46 #include "fss.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/namei.h> 51 #include <sys/filedesc.h> 52 #include <sys/kernel.h> 53 #include <sys/file.h> 54 #include <sys/stat.h> 55 #include <sys/vnode.h> 56 #include <sys/mount.h> 57 #include <sys/proc.h> 58 #include <sys/uio.h> 59 #include <sys/malloc.h> 60 #include <sys/dirent.h> 61 #include <sys/extattr.h> 62 #include <sys/sysctl.h> 63 #include <sys/sa.h> 64 #include <sys/syscallargs.h> 65 #ifdef KTRACE 66 #include <sys/ktrace.h> 67 #endif 68 #ifdef VERIFIED_EXEC 69 #include <sys/verified_exec.h> 70 #endif /* VERIFIED_EXEC */ 71 72 #include <miscfs/genfs/genfs.h> 73 #include <miscfs/syncfs/syncfs.h> 74 75 #if NFSS > 0 76 #include <dev/fssvar.h> 77 #endif 78 79 MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct"); 80 81 static int change_dir(struct nameidata *, struct proc *); 82 static int change_flags(struct vnode *, u_long, struct proc *); 83 static int change_mode(struct vnode *, int, struct proc *p); 84 static int change_owner(struct vnode *, uid_t, gid_t, struct proc *, int); 85 static int change_utimes(struct vnode *vp, const struct timeval *, 86 struct proc *p); 87 static int rename_files(const char *, const char *, struct proc *, int); 88 89 void checkdirs(struct vnode *); 90 91 int dovfsusermount = 0; 92 93 /* 94 * Virtual File System System Calls 95 */ 96 97 /* 98 * Mount a file system. 99 */ 100 101 #if defined(COMPAT_09) || defined(COMPAT_43) 102 /* 103 * This table is used to maintain compatibility with 4.3BSD 104 * and NetBSD 0.9 mount syscalls. Note, the order is important! 105 * 106 * Do not modify this table. It should only contain filesystems 107 * supported by NetBSD 0.9 and 4.3BSD. 108 */ 109 const char * const mountcompatnames[] = { 110 NULL, /* 0 = MOUNT_NONE */ 111 MOUNT_FFS, /* 1 = MOUNT_UFS */ 112 MOUNT_NFS, /* 2 */ 113 MOUNT_MFS, /* 3 */ 114 MOUNT_MSDOS, /* 4 */ 115 MOUNT_CD9660, /* 5 = MOUNT_ISOFS */ 116 MOUNT_FDESC, /* 6 */ 117 MOUNT_KERNFS, /* 7 */ 118 NULL, /* 8 = MOUNT_DEVFS */ 119 MOUNT_AFS, /* 9 */ 120 }; 121 const int nmountcompatnames = sizeof(mountcompatnames) / 122 sizeof(mountcompatnames[0]); 123 #endif /* COMPAT_09 || COMPAT_43 */ 124 125 /* ARGSUSED */ 126 int 127 sys_mount(l, v, retval) 128 struct lwp *l; 129 void *v; 130 register_t *retval; 131 { 132 struct sys_mount_args /* { 133 syscallarg(const char *) type; 134 syscallarg(const char *) path; 135 syscallarg(int) flags; 136 syscallarg(void *) data; 137 } */ *uap = v; 138 struct proc *p = l->l_proc; 139 struct vnode *vp; 140 struct mount *mp; 141 int error, flag = 0; 142 char fstypename[MFSNAMELEN]; 143 struct vattr va; 144 struct nameidata nd; 145 struct vfsops *vfs; 146 147 /* 148 * if MNT_GETARGS is specified, it should be only flag. 149 */ 150 151 if ((SCARG(uap, flags) & MNT_GETARGS) != 0 && 152 (SCARG(uap, flags) & ~MNT_GETARGS) != 0) { 153 return EINVAL; 154 } 155 156 if (dovfsusermount == 0 && (SCARG(uap, flags) & MNT_GETARGS) == 0 && 157 (error = suser(p->p_ucred, &p->p_acflag))) 158 return (error); 159 /* 160 * Get vnode to be covered 161 */ 162 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 163 SCARG(uap, path), p); 164 if ((error = namei(&nd)) != 0) 165 return (error); 166 vp = nd.ni_vp; 167 /* 168 * A lookup in VFS_MOUNT might result in an attempt to 169 * lock this vnode again, so make the lock recursive. 170 */ 171 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE); 172 if (SCARG(uap, flags) & (MNT_UPDATE | MNT_GETARGS)) { 173 if ((vp->v_flag & VROOT) == 0) { 174 vput(vp); 175 return (EINVAL); 176 } 177 mp = vp->v_mount; 178 flag = mp->mnt_flag; 179 vfs = mp->mnt_op; 180 /* 181 * We only allow the filesystem to be reloaded if it 182 * is currently mounted read-only. 183 */ 184 if ((SCARG(uap, flags) & MNT_RELOAD) && 185 ((mp->mnt_flag & MNT_RDONLY) == 0)) { 186 vput(vp); 187 return (EOPNOTSUPP); /* Needs translation */ 188 } 189 /* 190 * In "highly secure" mode, don't let the caller do anything 191 * but downgrade a filesystem from read-write to read-only. 192 * (see also below; MNT_UPDATE or MNT_GETARGS is required.) 193 */ 194 if (securelevel >= 2 && 195 SCARG(uap, flags) != MNT_GETARGS && 196 SCARG(uap, flags) != 197 (mp->mnt_flag | MNT_RDONLY | 198 MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) { 199 vput(vp); 200 return (EPERM); 201 } 202 mp->mnt_flag |= SCARG(uap, flags) & 203 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 204 /* 205 * Only root, or the user that did the original mount is 206 * permitted to update it. 207 */ 208 if ((mp->mnt_flag & MNT_GETARGS) == 0 && 209 mp->mnt_stat.f_owner != p->p_ucred->cr_uid && 210 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 211 vput(vp); 212 return (error); 213 } 214 /* 215 * Do not allow NFS export by non-root users. For non-root 216 * users, silently enforce MNT_NOSUID and MNT_NODEV, and 217 * MNT_NOEXEC if mount point is already MNT_NOEXEC. 218 */ 219 if (p->p_ucred->cr_uid != 0) { 220 if (SCARG(uap, flags) & MNT_EXPORTED) { 221 vput(vp); 222 return (EPERM); 223 } 224 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 225 if (flag & MNT_NOEXEC) 226 SCARG(uap, flags) |= MNT_NOEXEC; 227 } 228 if (vfs_busy(mp, LK_NOWAIT, 0)) { 229 vput(vp); 230 return (EPERM); 231 } 232 goto update; 233 } else { 234 if (securelevel >= 2) { 235 vput(vp); 236 return (EPERM); 237 } 238 } 239 /* 240 * If the user is not root, ensure that they own the directory 241 * onto which we are attempting to mount. 242 */ 243 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0 || 244 (va.va_uid != p->p_ucred->cr_uid && 245 (error = suser(p->p_ucred, &p->p_acflag)) != 0)) { 246 vput(vp); 247 return (error); 248 } 249 /* 250 * Do not allow NFS export by non-root users. For non-root users, 251 * silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the 252 * mount point is already MNT_NOEXEC. 253 */ 254 if (p->p_ucred->cr_uid != 0) { 255 if (SCARG(uap, flags) & MNT_EXPORTED) { 256 vput(vp); 257 return (EPERM); 258 } 259 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 260 if (vp->v_mount->mnt_flag & MNT_NOEXEC) 261 SCARG(uap, flags) |= MNT_NOEXEC; 262 } 263 if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) { 264 vput(vp); 265 return (error); 266 } 267 if (vp->v_type != VDIR) { 268 vput(vp); 269 return (ENOTDIR); 270 } 271 error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL); 272 if (error) { 273 #if defined(COMPAT_09) || defined(COMPAT_43) 274 /* 275 * Historically filesystem types were identified by number. 276 * If we get an integer for the filesystem type instead of a 277 * string, we check to see if it matches one of the historic 278 * filesystem types. 279 */ 280 u_long fsindex = (u_long)SCARG(uap, type); 281 if (fsindex >= nmountcompatnames || 282 mountcompatnames[fsindex] == NULL) { 283 vput(vp); 284 return (ENODEV); 285 } 286 strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN); 287 #else 288 vput(vp); 289 return (error); 290 #endif 291 } 292 #ifdef COMPAT_10 293 /* Accept `ufs' as an alias for `ffs'. */ 294 if (!strncmp(fstypename, "ufs", MFSNAMELEN)) 295 strncpy(fstypename, "ffs", MFSNAMELEN); 296 #endif 297 if ((vfs = vfs_getopsbyname(fstypename)) == NULL) { 298 vput(vp); 299 return (ENODEV); 300 } 301 if (vp->v_mountedhere != NULL) { 302 vput(vp); 303 return (EBUSY); 304 } 305 306 /* 307 * Allocate and initialize the file system. 308 */ 309 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 310 M_MOUNT, M_WAITOK); 311 memset((char *)mp, 0, (u_long)sizeof(struct mount)); 312 lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0); 313 simple_lock_init(&mp->mnt_slock); 314 (void)vfs_busy(mp, LK_NOWAIT, 0); 315 mp->mnt_op = vfs; 316 vfs->vfs_refcount++; 317 mp->mnt_vnodecovered = vp; 318 mp->mnt_stat.f_owner = p->p_ucred->cr_uid; 319 mp->mnt_unmounter = NULL; 320 mp->mnt_leaf = mp; 321 322 /* 323 * The underlying file system may refuse the mount for 324 * various reasons. Allow the user to force it to happen. 325 */ 326 mp->mnt_flag |= SCARG(uap, flags) & MNT_FORCE; 327 update: 328 if ((SCARG(uap, flags) & MNT_GETARGS) == 0) { 329 /* 330 * Set the mount level flags. 331 */ 332 if (SCARG(uap, flags) & MNT_RDONLY) 333 mp->mnt_flag |= MNT_RDONLY; 334 else if (mp->mnt_flag & MNT_RDONLY) 335 mp->mnt_iflag |= IMNT_WANTRDWR; 336 mp->mnt_flag &= 337 ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 338 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 339 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP | 340 MNT_MAGICLINKS); 341 mp->mnt_flag |= SCARG(uap, flags) & 342 (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 343 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 344 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP | 345 MNT_IGNORE | MNT_MAGICLINKS); 346 } 347 /* 348 * Mount the filesystem. 349 */ 350 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p); 351 if (mp->mnt_flag & (MNT_UPDATE | MNT_GETARGS)) { 352 if (mp->mnt_iflag & IMNT_WANTRDWR) 353 mp->mnt_flag &= ~MNT_RDONLY; 354 if (error) 355 mp->mnt_flag = flag; 356 mp->mnt_flag &=~ 357 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 358 mp->mnt_iflag &=~ IMNT_WANTRDWR; 359 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) { 360 if (mp->mnt_syncer == NULL) 361 error = vfs_allocate_syncvnode(mp); 362 } else { 363 if (mp->mnt_syncer != NULL) 364 vfs_deallocate_syncvnode(mp); 365 } 366 vfs_unbusy(mp); 367 VOP_UNLOCK(vp, 0); 368 vrele(vp); 369 return (error); 370 } 371 /* 372 * Put the new filesystem on the mount list after root. 373 */ 374 cache_purge(vp); 375 if (!error) { 376 mp->mnt_flag &=~ 377 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 378 mp->mnt_iflag &=~ IMNT_WANTRDWR; 379 vp->v_mountedhere = mp; 380 simple_lock(&mountlist_slock); 381 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 382 simple_unlock(&mountlist_slock); 383 checkdirs(vp); 384 VOP_UNLOCK(vp, 0); 385 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 386 error = vfs_allocate_syncvnode(mp); 387 vfs_unbusy(mp); 388 (void) VFS_STATVFS(mp, &mp->mnt_stat, p); 389 if ((error = VFS_START(mp, 0, p))) 390 vrele(vp); 391 } else { 392 vp->v_mountedhere = (struct mount *)0; 393 vfs->vfs_refcount--; 394 vfs_unbusy(mp); 395 free(mp, M_MOUNT); 396 vput(vp); 397 } 398 return (error); 399 } 400 401 /* 402 * Scan all active processes to see if any of them have a current 403 * or root directory onto which the new filesystem has just been 404 * mounted. If so, replace them with the new mount point. 405 */ 406 void 407 checkdirs(olddp) 408 struct vnode *olddp; 409 { 410 struct cwdinfo *cwdi; 411 struct vnode *newdp; 412 struct proc *p; 413 414 if (olddp->v_usecount == 1) 415 return; 416 if (VFS_ROOT(olddp->v_mountedhere, &newdp)) 417 panic("mount: lost mount"); 418 proclist_lock_read(); 419 PROCLIST_FOREACH(p, &allproc) { 420 cwdi = p->p_cwdi; 421 if (!cwdi) 422 continue; 423 if (cwdi->cwdi_cdir == olddp) { 424 vrele(cwdi->cwdi_cdir); 425 VREF(newdp); 426 cwdi->cwdi_cdir = newdp; 427 } 428 if (cwdi->cwdi_rdir == olddp) { 429 vrele(cwdi->cwdi_rdir); 430 VREF(newdp); 431 cwdi->cwdi_rdir = newdp; 432 } 433 } 434 proclist_unlock_read(); 435 if (rootvnode == olddp) { 436 vrele(rootvnode); 437 VREF(newdp); 438 rootvnode = newdp; 439 } 440 vput(newdp); 441 } 442 443 /* 444 * Unmount a file system. 445 * 446 * Note: unmount takes a path to the vnode mounted on as argument, 447 * not special file (as before). 448 */ 449 /* ARGSUSED */ 450 int 451 sys_unmount(l, v, retval) 452 struct lwp *l; 453 void *v; 454 register_t *retval; 455 { 456 struct sys_unmount_args /* { 457 syscallarg(const char *) path; 458 syscallarg(int) flags; 459 } */ *uap = v; 460 struct proc *p = l->l_proc; 461 struct vnode *vp; 462 struct mount *mp; 463 int error; 464 struct nameidata nd; 465 466 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 467 SCARG(uap, path), p); 468 if ((error = namei(&nd)) != 0) 469 return (error); 470 vp = nd.ni_vp; 471 mp = vp->v_mount; 472 473 /* 474 * Only root, or the user that did the original mount is 475 * permitted to unmount this filesystem. 476 */ 477 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) && 478 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 479 vput(vp); 480 return (error); 481 } 482 483 /* 484 * Don't allow unmounting the root file system. 485 */ 486 if (mp->mnt_flag & MNT_ROOTFS) { 487 vput(vp); 488 return (EINVAL); 489 } 490 491 /* 492 * Must be the root of the filesystem 493 */ 494 if ((vp->v_flag & VROOT) == 0) { 495 vput(vp); 496 return (EINVAL); 497 } 498 vput(vp); 499 500 /* 501 * XXX Freeze syncer. Must do this before locking the 502 * mount point. See dounmount() for details. 503 */ 504 lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL); 505 506 if (vfs_busy(mp, 0, 0)) { 507 lockmgr(&syncer_lock, LK_RELEASE, NULL); 508 return (EBUSY); 509 } 510 511 return (dounmount(mp, SCARG(uap, flags), p)); 512 } 513 514 /* 515 * Do the actual file system unmount. File system is assumed to have been 516 * marked busy by the caller. 517 */ 518 int 519 dounmount(mp, flags, p) 520 struct mount *mp; 521 int flags; 522 struct proc *p; 523 { 524 struct vnode *coveredvp; 525 int error; 526 int async; 527 int used_syncer; 528 529 simple_lock(&mountlist_slock); 530 vfs_unbusy(mp); 531 used_syncer = (mp->mnt_syncer != NULL); 532 533 /* 534 * XXX Syncer must be frozen when we get here. This should really 535 * be done on a per-mountpoint basis, but especially the softdep 536 * code possibly called from the syncer doens't exactly work on a 537 * per-mountpoint basis, so the softdep code would become a maze 538 * of vfs_busy() calls. 539 * 540 * The caller of dounmount() must acquire syncer_lock because 541 * the syncer itself acquires locks in syncer_lock -> vfs_busy 542 * order, and we must preserve that order to avoid deadlock. 543 * 544 * So, if the file system did not use the syncer, now is 545 * the time to release the syncer_lock. 546 */ 547 if (used_syncer == 0) 548 lockmgr(&syncer_lock, LK_RELEASE, NULL); 549 550 mp->mnt_iflag |= IMNT_UNMOUNT; 551 mp->mnt_unmounter = p; 552 lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock); 553 vn_start_write(NULL, &mp, V_WAIT); 554 555 if (mp->mnt_flag & MNT_EXPUBLIC) 556 vfs_setpublicfs(NULL, NULL, NULL); 557 async = mp->mnt_flag & MNT_ASYNC; 558 mp->mnt_flag &= ~MNT_ASYNC; 559 cache_purgevfs(mp); /* remove cache entries for this file sys */ 560 if (mp->mnt_syncer != NULL) 561 vfs_deallocate_syncvnode(mp); 562 error = 0; 563 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 564 #if NFSS > 0 565 error = fss_umount_hook(mp, (flags & MNT_FORCE)); 566 #endif 567 if (error == 0) 568 error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p); 569 } 570 if (error == 0 || (flags & MNT_FORCE)) 571 error = VFS_UNMOUNT(mp, flags, p); 572 vn_finished_write(mp, 0); 573 simple_lock(&mountlist_slock); 574 if (error) { 575 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 576 (void) vfs_allocate_syncvnode(mp); 577 mp->mnt_iflag &= ~IMNT_UNMOUNT; 578 mp->mnt_unmounter = NULL; 579 mp->mnt_flag |= async; 580 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE, 581 &mountlist_slock); 582 if (used_syncer) 583 lockmgr(&syncer_lock, LK_RELEASE, NULL); 584 simple_lock(&mp->mnt_slock); 585 while (mp->mnt_wcnt > 0) { 586 wakeup(mp); 587 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1", 588 0, &mp->mnt_slock); 589 } 590 simple_unlock(&mp->mnt_slock); 591 return (error); 592 } 593 CIRCLEQ_REMOVE(&mountlist, mp, mnt_list); 594 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) { 595 coveredvp->v_mountedhere = NULL; 596 vrele(coveredvp); 597 } 598 mp->mnt_op->vfs_refcount--; 599 if (LIST_FIRST(&mp->mnt_vnodelist) != NULL) 600 panic("unmount: dangling vnode"); 601 mp->mnt_iflag |= IMNT_GONE; 602 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock); 603 if (used_syncer) 604 lockmgr(&syncer_lock, LK_RELEASE, NULL); 605 simple_lock(&mp->mnt_slock); 606 while (mp->mnt_wcnt > 0) { 607 wakeup(mp); 608 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0, &mp->mnt_slock); 609 } 610 simple_unlock(&mp->mnt_slock); 611 free(mp, M_MOUNT); 612 return (0); 613 } 614 615 /* 616 * Sync each mounted filesystem. 617 */ 618 #ifdef DEBUG 619 int syncprt = 0; 620 struct ctldebug debug0 = { "syncprt", &syncprt }; 621 #endif 622 623 /* ARGSUSED */ 624 int 625 sys_sync(l, v, retval) 626 struct lwp *l; 627 void *v; 628 register_t *retval; 629 { 630 struct mount *mp, *nmp; 631 int asyncflag; 632 struct proc *p = l == NULL ? &proc0 : l->l_proc; 633 634 simple_lock(&mountlist_slock); 635 for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) { 636 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 637 nmp = mp->mnt_list.cqe_prev; 638 continue; 639 } 640 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 641 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 642 asyncflag = mp->mnt_flag & MNT_ASYNC; 643 mp->mnt_flag &= ~MNT_ASYNC; 644 VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p); 645 if (asyncflag) 646 mp->mnt_flag |= MNT_ASYNC; 647 vn_finished_write(mp, 0); 648 } 649 simple_lock(&mountlist_slock); 650 nmp = mp->mnt_list.cqe_prev; 651 vfs_unbusy(mp); 652 653 } 654 simple_unlock(&mountlist_slock); 655 #ifdef DEBUG 656 if (syncprt) 657 vfs_bufstats(); 658 #endif /* DEBUG */ 659 return (0); 660 } 661 662 /* 663 * Change filesystem quotas. 664 */ 665 /* ARGSUSED */ 666 int 667 sys_quotactl(l, v, retval) 668 struct lwp *l; 669 void *v; 670 register_t *retval; 671 { 672 struct sys_quotactl_args /* { 673 syscallarg(const char *) path; 674 syscallarg(int) cmd; 675 syscallarg(int) uid; 676 syscallarg(caddr_t) arg; 677 } */ *uap = v; 678 struct proc *p = l->l_proc; 679 struct mount *mp; 680 int error; 681 struct nameidata nd; 682 683 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 684 if ((error = namei(&nd)) != 0) 685 return (error); 686 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 687 vrele(nd.ni_vp); 688 if (error) 689 return (error); 690 error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid), 691 SCARG(uap, arg), p); 692 vn_finished_write(mp, 0); 693 return (error); 694 } 695 696 int 697 dostatvfs(struct mount *mp, struct statvfs *sp, struct proc *p, int flags, 698 int root) 699 { 700 struct cwdinfo *cwdi = p->p_cwdi; 701 int error = 0; 702 703 /* 704 * If MNT_NOWAIT or MNT_LAZY is specified, do not 705 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY 706 * overrides MNT_NOWAIT. 707 */ 708 if (flags == MNT_NOWAIT || flags == MNT_LAZY || 709 (flags != MNT_WAIT && flags != 0)) { 710 memcpy(sp, &mp->mnt_stat, sizeof(*sp)); 711 goto done; 712 } 713 714 /* Get the filesystem stats now */ 715 memset(sp, 0, sizeof(*sp)); 716 if ((error = VFS_STATVFS(mp, sp, p)) != 0) { 717 return error; 718 } 719 720 if (cwdi->cwdi_rdir == NULL) 721 (void)memcpy(&mp->mnt_stat, sp, sizeof(mp->mnt_stat)); 722 done: 723 if (cwdi->cwdi_rdir != NULL) { 724 size_t len; 725 char *bp; 726 char *path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 727 if (!path) 728 return ENOMEM; 729 730 bp = path + MAXPATHLEN; 731 *--bp = '\0'; 732 error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, path, 733 MAXPATHLEN / 2, 0, p); 734 if (error) { 735 free(path, M_TEMP); 736 return error; 737 } 738 len = strlen(bp); 739 /* 740 * for mount points that are below our root, we can see 741 * them, so we fix up the pathname and return them. The 742 * rest we cannot see, so we don't allow viewing the 743 * data. 744 */ 745 if (strncmp(bp, sp->f_mntonname, len) == 0) { 746 strlcpy(sp->f_mntonname, &sp->f_mntonname[len], 747 sizeof(sp->f_mntonname)); 748 if (sp->f_mntonname[0] == '\0') 749 (void)strlcpy(sp->f_mntonname, "/", 750 sizeof(sp->f_mntonname)); 751 } else { 752 if (root) 753 (void)strlcpy(sp->f_mntonname, "/", 754 sizeof(sp->f_mntonname)); 755 else 756 error = EPERM; 757 } 758 free(path, M_TEMP); 759 } 760 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 761 return error; 762 } 763 764 /* 765 * Get filesystem statistics. 766 */ 767 /* ARGSUSED */ 768 int 769 sys_statvfs1(l, v, retval) 770 struct lwp *l; 771 void *v; 772 register_t *retval; 773 { 774 struct sys_statvfs1_args /* { 775 syscallarg(const char *) path; 776 syscallarg(struct statvfs *) buf; 777 syscallarg(int) flags; 778 } */ *uap = v; 779 struct proc *p = l->l_proc; 780 struct mount *mp; 781 struct statvfs sbuf; 782 int error; 783 struct nameidata nd; 784 785 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 786 if ((error = namei(&nd)) != 0) 787 return error; 788 mp = nd.ni_vp->v_mount; 789 vrele(nd.ni_vp); 790 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 791 return error; 792 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 793 } 794 795 /* 796 * Get filesystem statistics. 797 */ 798 /* ARGSUSED */ 799 int 800 sys_fstatvfs1(l, v, retval) 801 struct lwp *l; 802 void *v; 803 register_t *retval; 804 { 805 struct sys_fstatvfs1_args /* { 806 syscallarg(int) fd; 807 syscallarg(struct statvfs *) buf; 808 syscallarg(int) flags; 809 } */ *uap = v; 810 struct proc *p = l->l_proc; 811 struct file *fp; 812 struct mount *mp; 813 struct statvfs sbuf; 814 int error; 815 816 /* getvnode() will use the descriptor for us */ 817 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 818 return (error); 819 mp = ((struct vnode *)fp->f_data)->v_mount; 820 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 821 goto out; 822 error = copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 823 out: 824 FILE_UNUSE(fp, p); 825 return error; 826 } 827 828 829 /* 830 * Get statistics on all filesystems. 831 */ 832 int 833 sys_getvfsstat(l, v, retval) 834 struct lwp *l; 835 void *v; 836 register_t *retval; 837 { 838 struct sys_getvfsstat_args /* { 839 syscallarg(struct statvfs *) buf; 840 syscallarg(size_t) bufsize; 841 syscallarg(int) flags; 842 } */ *uap = v; 843 int root = 0; 844 struct proc *p = l->l_proc; 845 struct mount *mp, *nmp; 846 struct statvfs sbuf; 847 struct statvfs *sfsp; 848 size_t count, maxcount; 849 int error = 0; 850 851 maxcount = SCARG(uap, bufsize) / sizeof(struct statvfs); 852 sfsp = SCARG(uap, buf); 853 simple_lock(&mountlist_slock); 854 count = 0; 855 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 856 mp = nmp) { 857 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 858 nmp = CIRCLEQ_NEXT(mp, mnt_list); 859 continue; 860 } 861 if (sfsp && count < maxcount) { 862 error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 0); 863 if (error) { 864 simple_lock(&mountlist_slock); 865 nmp = CIRCLEQ_NEXT(mp, mnt_list); 866 vfs_unbusy(mp); 867 continue; 868 } 869 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 870 if (error) { 871 vfs_unbusy(mp); 872 return (error); 873 } 874 sfsp++; 875 root |= strcmp(sbuf.f_mntonname, "/") == 0; 876 } 877 count++; 878 simple_lock(&mountlist_slock); 879 nmp = CIRCLEQ_NEXT(mp, mnt_list); 880 vfs_unbusy(mp); 881 } 882 simple_unlock(&mountlist_slock); 883 if (root == 0 && p->p_cwdi->cwdi_rdir) { 884 /* 885 * fake a root entry 886 */ 887 if ((error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, &sbuf, p, 888 SCARG(uap, flags), 1)) != 0) 889 return error; 890 if (sfsp) 891 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 892 count++; 893 } 894 if (sfsp && count > maxcount) 895 *retval = maxcount; 896 else 897 *retval = count; 898 return error; 899 } 900 901 /* 902 * Change current working directory to a given file descriptor. 903 */ 904 /* ARGSUSED */ 905 int 906 sys_fchdir(l, v, retval) 907 struct lwp *l; 908 void *v; 909 register_t *retval; 910 { 911 struct sys_fchdir_args /* { 912 syscallarg(int) fd; 913 } */ *uap = v; 914 struct proc *p = l->l_proc; 915 struct filedesc *fdp = p->p_fd; 916 struct cwdinfo *cwdi = p->p_cwdi; 917 struct vnode *vp, *tdp; 918 struct mount *mp; 919 struct file *fp; 920 int error; 921 922 /* getvnode() will use the descriptor for us */ 923 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 924 return (error); 925 vp = (struct vnode *)fp->f_data; 926 927 VREF(vp); 928 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 929 if (vp->v_type != VDIR) 930 error = ENOTDIR; 931 else 932 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 933 while (!error && (mp = vp->v_mountedhere) != NULL) { 934 if (vfs_busy(mp, 0, 0)) 935 continue; 936 error = VFS_ROOT(mp, &tdp); 937 vfs_unbusy(mp); 938 if (error) 939 break; 940 vput(vp); 941 vp = tdp; 942 } 943 if (error) { 944 vput(vp); 945 goto out; 946 } 947 VOP_UNLOCK(vp, 0); 948 949 /* 950 * Disallow changing to a directory not under the process's 951 * current root directory (if there is one). 952 */ 953 if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, p)) { 954 vrele(vp); 955 error = EPERM; /* operation not permitted */ 956 goto out; 957 } 958 959 vrele(cwdi->cwdi_cdir); 960 cwdi->cwdi_cdir = vp; 961 out: 962 FILE_UNUSE(fp, p); 963 return (error); 964 } 965 966 /* 967 * Change this process's notion of the root directory to a given file descriptor. 968 */ 969 970 int 971 sys_fchroot(l, v, retval) 972 struct lwp *l; 973 void *v; 974 register_t *retval; 975 { 976 struct sys_fchroot_args *uap = v; 977 struct proc *p = l->l_proc; 978 struct filedesc *fdp = p->p_fd; 979 struct cwdinfo *cwdi = p->p_cwdi; 980 struct vnode *vp; 981 struct file *fp; 982 int error; 983 984 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 985 return error; 986 /* getvnode() will use the descriptor for us */ 987 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 988 return error; 989 vp = (struct vnode *) fp->f_data; 990 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 991 if (vp->v_type != VDIR) 992 error = ENOTDIR; 993 else 994 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 995 VOP_UNLOCK(vp, 0); 996 if (error) 997 goto out; 998 VREF(vp); 999 1000 /* 1001 * Prevent escaping from chroot by putting the root under 1002 * the working directory. Silently chdir to / if we aren't 1003 * already there. 1004 */ 1005 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1006 /* 1007 * XXX would be more failsafe to change directory to a 1008 * deadfs node here instead 1009 */ 1010 vrele(cwdi->cwdi_cdir); 1011 VREF(vp); 1012 cwdi->cwdi_cdir = vp; 1013 } 1014 1015 if (cwdi->cwdi_rdir != NULL) 1016 vrele(cwdi->cwdi_rdir); 1017 cwdi->cwdi_rdir = vp; 1018 out: 1019 FILE_UNUSE(fp, p); 1020 return (error); 1021 } 1022 1023 1024 1025 /* 1026 * Change current working directory (``.''). 1027 */ 1028 /* ARGSUSED */ 1029 int 1030 sys_chdir(l, v, retval) 1031 struct lwp *l; 1032 void *v; 1033 register_t *retval; 1034 { 1035 struct sys_chdir_args /* { 1036 syscallarg(const char *) path; 1037 } */ *uap = v; 1038 struct proc *p = l->l_proc; 1039 struct cwdinfo *cwdi = p->p_cwdi; 1040 int error; 1041 struct nameidata nd; 1042 1043 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1044 SCARG(uap, path), p); 1045 if ((error = change_dir(&nd, p)) != 0) 1046 return (error); 1047 vrele(cwdi->cwdi_cdir); 1048 cwdi->cwdi_cdir = nd.ni_vp; 1049 return (0); 1050 } 1051 1052 /* 1053 * Change notion of root (``/'') directory. 1054 */ 1055 /* ARGSUSED */ 1056 int 1057 sys_chroot(l, v, retval) 1058 struct lwp *l; 1059 void *v; 1060 register_t *retval; 1061 { 1062 struct sys_chroot_args /* { 1063 syscallarg(const char *) path; 1064 } */ *uap = v; 1065 struct proc *p = l->l_proc; 1066 struct cwdinfo *cwdi = p->p_cwdi; 1067 struct vnode *vp; 1068 int error; 1069 struct nameidata nd; 1070 1071 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1072 return (error); 1073 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1074 SCARG(uap, path), p); 1075 if ((error = change_dir(&nd, p)) != 0) 1076 return (error); 1077 if (cwdi->cwdi_rdir != NULL) 1078 vrele(cwdi->cwdi_rdir); 1079 vp = nd.ni_vp; 1080 cwdi->cwdi_rdir = vp; 1081 1082 /* 1083 * Prevent escaping from chroot by putting the root under 1084 * the working directory. Silently chdir to / if we aren't 1085 * already there. 1086 */ 1087 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1088 /* 1089 * XXX would be more failsafe to change directory to a 1090 * deadfs node here instead 1091 */ 1092 vrele(cwdi->cwdi_cdir); 1093 VREF(vp); 1094 cwdi->cwdi_cdir = vp; 1095 } 1096 1097 return (0); 1098 } 1099 1100 /* 1101 * Common routine for chroot and chdir. 1102 */ 1103 static int 1104 change_dir(ndp, p) 1105 struct nameidata *ndp; 1106 struct proc *p; 1107 { 1108 struct vnode *vp; 1109 int error; 1110 1111 if ((error = namei(ndp)) != 0) 1112 return (error); 1113 vp = ndp->ni_vp; 1114 if (vp->v_type != VDIR) 1115 error = ENOTDIR; 1116 else 1117 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 1118 1119 if (error) 1120 vput(vp); 1121 else 1122 VOP_UNLOCK(vp, 0); 1123 return (error); 1124 } 1125 1126 /* 1127 * Check permissions, allocate an open file structure, 1128 * and call the device open routine if any. 1129 */ 1130 int 1131 sys_open(l, v, retval) 1132 struct lwp *l; 1133 void *v; 1134 register_t *retval; 1135 { 1136 struct sys_open_args /* { 1137 syscallarg(const char *) path; 1138 syscallarg(int) flags; 1139 syscallarg(int) mode; 1140 } */ *uap = v; 1141 struct proc *p = l->l_proc; 1142 struct cwdinfo *cwdi = p->p_cwdi; 1143 struct filedesc *fdp = p->p_fd; 1144 struct file *fp; 1145 struct vnode *vp; 1146 int flags, cmode; 1147 int type, indx, error; 1148 struct flock lf; 1149 struct nameidata nd; 1150 1151 flags = FFLAGS(SCARG(uap, flags)); 1152 if ((flags & (FREAD | FWRITE)) == 0) 1153 return (EINVAL); 1154 /* falloc() will use the file descriptor for us */ 1155 if ((error = falloc(p, &fp, &indx)) != 0) 1156 return (error); 1157 cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT; 1158 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1159 l->l_dupfd = -indx - 1; /* XXX check for fdopen */ 1160 if ((error = vn_open(&nd, flags, cmode)) != 0) { 1161 FILE_UNUSE(fp, p); 1162 fdp->fd_ofiles[indx] = NULL; 1163 ffree(fp); 1164 if ((error == EDUPFD || error == EMOVEFD) && 1165 l->l_dupfd >= 0 && /* XXX from fdopen */ 1166 (error = 1167 dupfdopen(p, indx, l->l_dupfd, flags, error)) == 0) { 1168 *retval = indx; 1169 return (0); 1170 } 1171 if (error == ERESTART) 1172 error = EINTR; 1173 fdremove(fdp, indx); 1174 return (error); 1175 } 1176 l->l_dupfd = 0; 1177 vp = nd.ni_vp; 1178 fp->f_flag = flags & FMASK; 1179 fp->f_type = DTYPE_VNODE; 1180 fp->f_ops = &vnops; 1181 fp->f_data = vp; 1182 if (flags & (O_EXLOCK | O_SHLOCK)) { 1183 lf.l_whence = SEEK_SET; 1184 lf.l_start = 0; 1185 lf.l_len = 0; 1186 if (flags & O_EXLOCK) 1187 lf.l_type = F_WRLCK; 1188 else 1189 lf.l_type = F_RDLCK; 1190 type = F_FLOCK; 1191 if ((flags & FNONBLOCK) == 0) 1192 type |= F_WAIT; 1193 VOP_UNLOCK(vp, 0); 1194 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1195 if (error) { 1196 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1197 FILE_UNUSE(fp, p); 1198 ffree(fp); 1199 fdremove(fdp, indx); 1200 return (error); 1201 } 1202 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1203 fp->f_flag |= FHASLOCK; 1204 } 1205 VOP_UNLOCK(vp, 0); 1206 *retval = indx; 1207 FILE_SET_MATURE(fp); 1208 FILE_UNUSE(fp, p); 1209 return (0); 1210 } 1211 1212 /* 1213 * Get file handle system call 1214 */ 1215 int 1216 sys_getfh(l, v, retval) 1217 struct lwp *l; 1218 void *v; 1219 register_t *retval; 1220 { 1221 struct sys_getfh_args /* { 1222 syscallarg(char *) fname; 1223 syscallarg(fhandle_t *) fhp; 1224 } */ *uap = v; 1225 struct proc *p = l->l_proc; 1226 struct vnode *vp; 1227 fhandle_t fh; 1228 int error; 1229 struct nameidata nd; 1230 1231 /* 1232 * Must be super user 1233 */ 1234 error = suser(p->p_ucred, &p->p_acflag); 1235 if (error) 1236 return (error); 1237 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1238 SCARG(uap, fname), p); 1239 error = namei(&nd); 1240 if (error) 1241 return (error); 1242 vp = nd.ni_vp; 1243 memset(&fh, 0, sizeof(fh)); 1244 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1245 error = VFS_VPTOFH(vp, &fh.fh_fid); 1246 vput(vp); 1247 if (error) 1248 return (error); 1249 error = copyout(&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); 1250 return (error); 1251 } 1252 1253 /* 1254 * Open a file given a file handle. 1255 * 1256 * Check permissions, allocate an open file structure, 1257 * and call the device open routine if any. 1258 */ 1259 int 1260 sys_fhopen(l, v, retval) 1261 struct lwp *l; 1262 void *v; 1263 register_t *retval; 1264 { 1265 struct sys_fhopen_args /* { 1266 syscallarg(const fhandle_t *) fhp; 1267 syscallarg(int) flags; 1268 } */ *uap = v; 1269 struct proc *p = l->l_proc; 1270 struct filedesc *fdp = p->p_fd; 1271 struct file *fp; 1272 struct vnode *vp = NULL; 1273 struct mount *mp; 1274 struct ucred *cred = p->p_ucred; 1275 int flags; 1276 struct file *nfp; 1277 int type, indx, error=0; 1278 struct flock lf; 1279 struct vattr va; 1280 fhandle_t fh; 1281 1282 /* 1283 * Must be super user 1284 */ 1285 if ((error = suser(p->p_ucred, &p->p_acflag))) 1286 return (error); 1287 1288 flags = FFLAGS(SCARG(uap, flags)); 1289 if ((flags & (FREAD | FWRITE)) == 0) 1290 return (EINVAL); 1291 if ((flags & O_CREAT)) 1292 return (EINVAL); 1293 /* falloc() will use the file descriptor for us */ 1294 if ((error = falloc(p, &nfp, &indx)) != 0) 1295 return (error); 1296 fp = nfp; 1297 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1298 goto bad; 1299 1300 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) { 1301 error = ESTALE; 1302 goto bad; 1303 } 1304 1305 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) { 1306 vp = NULL; /* most likely unnecessary sanity for bad: */ 1307 goto bad; 1308 } 1309 1310 /* Now do an effective vn_open */ 1311 1312 if (vp->v_type == VSOCK) { 1313 error = EOPNOTSUPP; 1314 goto bad; 1315 } 1316 if (flags & FREAD) { 1317 if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0) 1318 goto bad; 1319 } 1320 if (flags & (FWRITE | O_TRUNC)) { 1321 if (vp->v_type == VDIR) { 1322 error = EISDIR; 1323 goto bad; 1324 } 1325 if ((error = vn_writechk(vp)) != 0 || 1326 (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0) 1327 goto bad; 1328 } 1329 if (flags & O_TRUNC) { 1330 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 1331 goto bad; 1332 VOP_UNLOCK(vp, 0); /* XXX */ 1333 VOP_LEASE(vp, p, cred, LEASE_WRITE); 1334 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */ 1335 VATTR_NULL(&va); 1336 va.va_size = 0; 1337 error = VOP_SETATTR(vp, &va, cred, p); 1338 vn_finished_write(mp, 0); 1339 if (error) 1340 goto bad; 1341 } 1342 if ((error = VOP_OPEN(vp, flags, cred, p)) != 0) 1343 goto bad; 1344 if (vp->v_type == VREG && 1345 uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) { 1346 error = EIO; 1347 goto bad; 1348 } 1349 if (flags & FWRITE) 1350 vp->v_writecount++; 1351 1352 /* done with modified vn_open, now finish what sys_open does. */ 1353 1354 fp->f_flag = flags & FMASK; 1355 fp->f_type = DTYPE_VNODE; 1356 fp->f_ops = &vnops; 1357 fp->f_data = vp; 1358 if (flags & (O_EXLOCK | O_SHLOCK)) { 1359 lf.l_whence = SEEK_SET; 1360 lf.l_start = 0; 1361 lf.l_len = 0; 1362 if (flags & O_EXLOCK) 1363 lf.l_type = F_WRLCK; 1364 else 1365 lf.l_type = F_RDLCK; 1366 type = F_FLOCK; 1367 if ((flags & FNONBLOCK) == 0) 1368 type |= F_WAIT; 1369 VOP_UNLOCK(vp, 0); 1370 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1371 if (error) { 1372 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1373 FILE_UNUSE(fp, p); 1374 ffree(fp); 1375 fdremove(fdp, indx); 1376 return (error); 1377 } 1378 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1379 fp->f_flag |= FHASLOCK; 1380 } 1381 VOP_UNLOCK(vp, 0); 1382 *retval = indx; 1383 FILE_SET_MATURE(fp); 1384 FILE_UNUSE(fp, p); 1385 return (0); 1386 1387 bad: 1388 FILE_UNUSE(fp, p); 1389 ffree(fp); 1390 fdremove(fdp, indx); 1391 if (vp != NULL) 1392 vput(vp); 1393 return (error); 1394 } 1395 1396 /* ARGSUSED */ 1397 int 1398 sys_fhstat(l, v, retval) 1399 struct lwp *l; 1400 void *v; 1401 register_t *retval; 1402 { 1403 struct sys_fhstat_args /* { 1404 syscallarg(const fhandle_t *) fhp; 1405 syscallarg(struct stat *) sb; 1406 } */ *uap = v; 1407 struct proc *p = l->l_proc; 1408 struct stat sb; 1409 int error; 1410 fhandle_t fh; 1411 struct mount *mp; 1412 struct vnode *vp; 1413 1414 /* 1415 * Must be super user 1416 */ 1417 if ((error = suser(p->p_ucred, &p->p_acflag))) 1418 return (error); 1419 1420 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1421 return (error); 1422 1423 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1424 return (ESTALE); 1425 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1426 return (error); 1427 error = vn_stat(vp, &sb, p); 1428 vput(vp); 1429 if (error) 1430 return (error); 1431 error = copyout(&sb, SCARG(uap, sb), sizeof(sb)); 1432 return (error); 1433 } 1434 1435 /* ARGSUSED */ 1436 int 1437 sys_fhstatvfs1(l, v, retval) 1438 struct lwp *l; 1439 void *v; 1440 register_t *retval; 1441 { 1442 struct sys_fhstatvfs1_args /* 1443 syscallarg(const fhandle_t *) fhp; 1444 syscallarg(struct statvfs *) buf; 1445 syscallarg(int) flags; 1446 } */ *uap = v; 1447 struct proc *p = l->l_proc; 1448 struct statvfs sbuf; 1449 fhandle_t fh; 1450 struct mount *mp; 1451 struct vnode *vp; 1452 int error; 1453 1454 /* 1455 * Must be super user 1456 */ 1457 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1458 return error; 1459 1460 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1461 return error; 1462 1463 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1464 return ESTALE; 1465 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1466 return error; 1467 1468 mp = vp->v_mount; 1469 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) { 1470 vput(vp); 1471 return error; 1472 } 1473 vput(vp); 1474 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 1475 } 1476 1477 /* 1478 * Create a special file. 1479 */ 1480 /* ARGSUSED */ 1481 int 1482 sys_mknod(l, v, retval) 1483 struct lwp *l; 1484 void *v; 1485 register_t *retval; 1486 { 1487 struct sys_mknod_args /* { 1488 syscallarg(const char *) path; 1489 syscallarg(int) mode; 1490 syscallarg(int) dev; 1491 } */ *uap = v; 1492 struct proc *p = l->l_proc; 1493 struct vnode *vp; 1494 struct mount *mp; 1495 struct vattr vattr; 1496 int error; 1497 int whiteout = 0; 1498 struct nameidata nd; 1499 1500 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1501 return (error); 1502 restart: 1503 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1504 if ((error = namei(&nd)) != 0) 1505 return (error); 1506 vp = nd.ni_vp; 1507 if (vp != NULL) 1508 error = EEXIST; 1509 else { 1510 VATTR_NULL(&vattr); 1511 vattr.va_mode = 1512 (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1513 vattr.va_rdev = SCARG(uap, dev); 1514 whiteout = 0; 1515 1516 switch (SCARG(uap, mode) & S_IFMT) { 1517 case S_IFMT: /* used by badsect to flag bad sectors */ 1518 vattr.va_type = VBAD; 1519 break; 1520 case S_IFCHR: 1521 vattr.va_type = VCHR; 1522 break; 1523 case S_IFBLK: 1524 vattr.va_type = VBLK; 1525 break; 1526 case S_IFWHT: 1527 whiteout = 1; 1528 break; 1529 default: 1530 error = EINVAL; 1531 break; 1532 } 1533 } 1534 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1535 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1536 if (nd.ni_dvp == vp) 1537 vrele(nd.ni_dvp); 1538 else 1539 vput(nd.ni_dvp); 1540 if (vp) 1541 vrele(vp); 1542 if ((error = vn_start_write(NULL, &mp, 1543 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1544 return (error); 1545 goto restart; 1546 } 1547 if (!error) { 1548 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1549 if (whiteout) { 1550 error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); 1551 if (error) 1552 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1553 vput(nd.ni_dvp); 1554 } else { 1555 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, 1556 &nd.ni_cnd, &vattr); 1557 if (error == 0) 1558 vput(nd.ni_vp); 1559 } 1560 } else { 1561 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1562 if (nd.ni_dvp == vp) 1563 vrele(nd.ni_dvp); 1564 else 1565 vput(nd.ni_dvp); 1566 if (vp) 1567 vrele(vp); 1568 } 1569 vn_finished_write(mp, 0); 1570 return (error); 1571 } 1572 1573 /* 1574 * Create a named pipe. 1575 */ 1576 /* ARGSUSED */ 1577 int 1578 sys_mkfifo(l, v, retval) 1579 struct lwp *l; 1580 void *v; 1581 register_t *retval; 1582 { 1583 struct sys_mkfifo_args /* { 1584 syscallarg(const char *) path; 1585 syscallarg(int) mode; 1586 } */ *uap = v; 1587 struct proc *p = l->l_proc; 1588 struct mount *mp; 1589 struct vattr vattr; 1590 int error; 1591 struct nameidata nd; 1592 1593 restart: 1594 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1595 if ((error = namei(&nd)) != 0) 1596 return (error); 1597 if (nd.ni_vp != NULL) { 1598 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1599 if (nd.ni_dvp == nd.ni_vp) 1600 vrele(nd.ni_dvp); 1601 else 1602 vput(nd.ni_dvp); 1603 vrele(nd.ni_vp); 1604 return (EEXIST); 1605 } 1606 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1607 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1608 if (nd.ni_dvp == nd.ni_vp) 1609 vrele(nd.ni_dvp); 1610 else 1611 vput(nd.ni_dvp); 1612 if (nd.ni_vp) 1613 vrele(nd.ni_vp); 1614 if ((error = vn_start_write(NULL, &mp, 1615 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1616 return (error); 1617 goto restart; 1618 } 1619 VATTR_NULL(&vattr); 1620 vattr.va_type = VFIFO; 1621 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1622 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1623 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 1624 if (error == 0) 1625 vput(nd.ni_vp); 1626 vn_finished_write(mp, 0); 1627 return (error); 1628 } 1629 1630 /* 1631 * Make a hard file link. 1632 */ 1633 /* ARGSUSED */ 1634 int 1635 sys_link(l, v, retval) 1636 struct lwp *l; 1637 void *v; 1638 register_t *retval; 1639 { 1640 struct sys_link_args /* { 1641 syscallarg(const char *) path; 1642 syscallarg(const char *) link; 1643 } */ *uap = v; 1644 struct proc *p = l->l_proc; 1645 struct vnode *vp; 1646 struct mount *mp; 1647 struct nameidata nd; 1648 int error; 1649 1650 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1651 if ((error = namei(&nd)) != 0) 1652 return (error); 1653 vp = nd.ni_vp; 1654 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 1655 vrele(vp); 1656 return (error); 1657 } 1658 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1659 if ((error = namei(&nd)) != 0) 1660 goto out; 1661 if (nd.ni_vp) { 1662 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1663 if (nd.ni_dvp == nd.ni_vp) 1664 vrele(nd.ni_dvp); 1665 else 1666 vput(nd.ni_dvp); 1667 vrele(nd.ni_vp); 1668 error = EEXIST; 1669 goto out; 1670 } 1671 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1672 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1673 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 1674 out: 1675 vrele(vp); 1676 vn_finished_write(mp, 0); 1677 return (error); 1678 } 1679 1680 /* 1681 * Make a symbolic link. 1682 */ 1683 /* ARGSUSED */ 1684 int 1685 sys_symlink(l, v, retval) 1686 struct lwp *l; 1687 void *v; 1688 register_t *retval; 1689 { 1690 struct sys_symlink_args /* { 1691 syscallarg(const char *) path; 1692 syscallarg(const char *) link; 1693 } */ *uap = v; 1694 struct proc *p = l->l_proc; 1695 struct mount *mp; 1696 struct vattr vattr; 1697 char *path; 1698 int error; 1699 struct nameidata nd; 1700 1701 path = PNBUF_GET(); 1702 error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL); 1703 if (error) 1704 goto out; 1705 restart: 1706 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1707 if ((error = namei(&nd)) != 0) 1708 goto out; 1709 if (nd.ni_vp) { 1710 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1711 if (nd.ni_dvp == nd.ni_vp) 1712 vrele(nd.ni_dvp); 1713 else 1714 vput(nd.ni_dvp); 1715 vrele(nd.ni_vp); 1716 error = EEXIST; 1717 goto out; 1718 } 1719 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1720 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1721 if (nd.ni_dvp == nd.ni_vp) 1722 vrele(nd.ni_dvp); 1723 else 1724 vput(nd.ni_dvp); 1725 if ((error = vn_start_write(NULL, &mp, 1726 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1727 return (error); 1728 goto restart; 1729 } 1730 VATTR_NULL(&vattr); 1731 vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask; 1732 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1733 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); 1734 if (error == 0) 1735 vput(nd.ni_vp); 1736 vn_finished_write(mp, 0); 1737 out: 1738 PNBUF_PUT(path); 1739 return (error); 1740 } 1741 1742 /* 1743 * Delete a whiteout from the filesystem. 1744 */ 1745 /* ARGSUSED */ 1746 int 1747 sys_undelete(l, v, retval) 1748 struct lwp *l; 1749 void *v; 1750 register_t *retval; 1751 { 1752 struct sys_undelete_args /* { 1753 syscallarg(const char *) path; 1754 } */ *uap = v; 1755 struct proc *p = l->l_proc; 1756 int error; 1757 struct mount *mp; 1758 struct nameidata nd; 1759 1760 restart: 1761 NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE, 1762 SCARG(uap, path), p); 1763 error = namei(&nd); 1764 if (error) 1765 return (error); 1766 1767 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { 1768 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1769 if (nd.ni_dvp == nd.ni_vp) 1770 vrele(nd.ni_dvp); 1771 else 1772 vput(nd.ni_dvp); 1773 if (nd.ni_vp) 1774 vrele(nd.ni_vp); 1775 return (EEXIST); 1776 } 1777 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1778 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1779 if (nd.ni_dvp == nd.ni_vp) 1780 vrele(nd.ni_dvp); 1781 else 1782 vput(nd.ni_dvp); 1783 if ((error = vn_start_write(NULL, &mp, 1784 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1785 return (error); 1786 goto restart; 1787 } 1788 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1789 if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0) 1790 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1791 vput(nd.ni_dvp); 1792 vn_finished_write(mp, 0); 1793 return (error); 1794 } 1795 1796 /* 1797 * Delete a name from the filesystem. 1798 */ 1799 /* ARGSUSED */ 1800 int 1801 sys_unlink(l, v, retval) 1802 struct lwp *l; 1803 void *v; 1804 register_t *retval; 1805 { 1806 struct sys_unlink_args /* { 1807 syscallarg(const char *) path; 1808 } */ *uap = v; 1809 struct proc *p = l->l_proc; 1810 struct mount *mp; 1811 struct vnode *vp; 1812 int error; 1813 struct nameidata nd; 1814 1815 restart: 1816 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 1817 SCARG(uap, path), p); 1818 if ((error = namei(&nd)) != 0) 1819 return (error); 1820 vp = nd.ni_vp; 1821 1822 /* 1823 * The root of a mounted filesystem cannot be deleted. 1824 */ 1825 if (vp->v_flag & VROOT) { 1826 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1827 if (nd.ni_dvp == vp) 1828 vrele(nd.ni_dvp); 1829 else 1830 vput(nd.ni_dvp); 1831 vput(vp); 1832 error = EBUSY; 1833 goto out; 1834 } 1835 1836 #ifdef VERIFIED_EXEC 1837 /* Handle remove requests for veriexec entries. */ 1838 if ((error = veriexec_removechk(p, vp, nd.ni_dirp)) != 0) { 1839 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1840 if (nd.ni_dvp == vp) 1841 vrele(nd.ni_dvp); 1842 else 1843 vput(nd.ni_dvp); 1844 vput(vp); 1845 goto out; 1846 } 1847 #endif /* VERIFIED_EXEC */ 1848 1849 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1850 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1851 if (nd.ni_dvp == vp) 1852 vrele(nd.ni_dvp); 1853 else 1854 vput(nd.ni_dvp); 1855 vput(vp); 1856 if ((error = vn_start_write(NULL, &mp, 1857 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1858 return (error); 1859 goto restart; 1860 } 1861 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1862 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1863 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1864 vn_finished_write(mp, 0); 1865 out: 1866 return (error); 1867 } 1868 1869 /* 1870 * Reposition read/write file offset. 1871 */ 1872 int 1873 sys_lseek(l, v, retval) 1874 struct lwp *l; 1875 void *v; 1876 register_t *retval; 1877 { 1878 struct sys_lseek_args /* { 1879 syscallarg(int) fd; 1880 syscallarg(int) pad; 1881 syscallarg(off_t) offset; 1882 syscallarg(int) whence; 1883 } */ *uap = v; 1884 struct proc *p = l->l_proc; 1885 struct ucred *cred = p->p_ucred; 1886 struct filedesc *fdp = p->p_fd; 1887 struct file *fp; 1888 struct vnode *vp; 1889 struct vattr vattr; 1890 off_t newoff; 1891 int error; 1892 1893 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1894 return (EBADF); 1895 1896 FILE_USE(fp); 1897 1898 vp = (struct vnode *)fp->f_data; 1899 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1900 error = ESPIPE; 1901 goto out; 1902 } 1903 1904 switch (SCARG(uap, whence)) { 1905 case SEEK_CUR: 1906 newoff = fp->f_offset + SCARG(uap, offset); 1907 break; 1908 case SEEK_END: 1909 error = VOP_GETATTR(vp, &vattr, cred, p); 1910 if (error) 1911 goto out; 1912 newoff = SCARG(uap, offset) + vattr.va_size; 1913 break; 1914 case SEEK_SET: 1915 newoff = SCARG(uap, offset); 1916 break; 1917 default: 1918 error = EINVAL; 1919 goto out; 1920 } 1921 if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0) 1922 goto out; 1923 1924 *(off_t *)retval = fp->f_offset = newoff; 1925 out: 1926 FILE_UNUSE(fp, p); 1927 return (error); 1928 } 1929 1930 /* 1931 * Positional read system call. 1932 */ 1933 int 1934 sys_pread(l, v, retval) 1935 struct lwp *l; 1936 void *v; 1937 register_t *retval; 1938 { 1939 struct sys_pread_args /* { 1940 syscallarg(int) fd; 1941 syscallarg(void *) buf; 1942 syscallarg(size_t) nbyte; 1943 syscallarg(off_t) offset; 1944 } */ *uap = v; 1945 struct proc *p = l->l_proc; 1946 struct filedesc *fdp = p->p_fd; 1947 struct file *fp; 1948 struct vnode *vp; 1949 off_t offset; 1950 int error, fd = SCARG(uap, fd); 1951 1952 if ((fp = fd_getfile(fdp, fd)) == NULL) 1953 return (EBADF); 1954 1955 if ((fp->f_flag & FREAD) == 0) { 1956 simple_unlock(&fp->f_slock); 1957 return (EBADF); 1958 } 1959 1960 FILE_USE(fp); 1961 1962 vp = (struct vnode *)fp->f_data; 1963 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1964 error = ESPIPE; 1965 goto out; 1966 } 1967 1968 offset = SCARG(uap, offset); 1969 1970 /* 1971 * XXX This works because no file systems actually 1972 * XXX take any action on the seek operation. 1973 */ 1974 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1975 goto out; 1976 1977 /* dofileread() will unuse the descriptor for us */ 1978 return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 1979 &offset, 0, retval)); 1980 1981 out: 1982 FILE_UNUSE(fp, p); 1983 return (error); 1984 } 1985 1986 /* 1987 * Positional scatter read system call. 1988 */ 1989 int 1990 sys_preadv(l, v, retval) 1991 struct lwp *l; 1992 void *v; 1993 register_t *retval; 1994 { 1995 struct sys_preadv_args /* { 1996 syscallarg(int) fd; 1997 syscallarg(const struct iovec *) iovp; 1998 syscallarg(int) iovcnt; 1999 syscallarg(off_t) offset; 2000 } */ *uap = v; 2001 struct proc *p = l->l_proc; 2002 struct filedesc *fdp = p->p_fd; 2003 struct file *fp; 2004 struct vnode *vp; 2005 off_t offset; 2006 int error, fd = SCARG(uap, fd); 2007 2008 if ((fp = fd_getfile(fdp, fd)) == NULL) 2009 return (EBADF); 2010 2011 if ((fp->f_flag & FREAD) == 0) { 2012 simple_unlock(&fp->f_slock); 2013 return (EBADF); 2014 } 2015 2016 FILE_USE(fp); 2017 2018 vp = (struct vnode *)fp->f_data; 2019 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2020 error = ESPIPE; 2021 goto out; 2022 } 2023 2024 offset = SCARG(uap, offset); 2025 2026 /* 2027 * XXX This works because no file systems actually 2028 * XXX take any action on the seek operation. 2029 */ 2030 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2031 goto out; 2032 2033 /* dofilereadv() will unuse the descriptor for us */ 2034 return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2035 &offset, 0, retval)); 2036 2037 out: 2038 FILE_UNUSE(fp, p); 2039 return (error); 2040 } 2041 2042 /* 2043 * Positional write system call. 2044 */ 2045 int 2046 sys_pwrite(l, v, retval) 2047 struct lwp *l; 2048 void *v; 2049 register_t *retval; 2050 { 2051 struct sys_pwrite_args /* { 2052 syscallarg(int) fd; 2053 syscallarg(const void *) buf; 2054 syscallarg(size_t) nbyte; 2055 syscallarg(off_t) offset; 2056 } */ *uap = v; 2057 struct proc *p = l->l_proc; 2058 struct filedesc *fdp = p->p_fd; 2059 struct file *fp; 2060 struct vnode *vp; 2061 off_t offset; 2062 int error, fd = SCARG(uap, fd); 2063 2064 if ((fp = fd_getfile(fdp, fd)) == NULL) 2065 return (EBADF); 2066 2067 if ((fp->f_flag & FWRITE) == 0) { 2068 simple_unlock(&fp->f_slock); 2069 return (EBADF); 2070 } 2071 2072 FILE_USE(fp); 2073 2074 vp = (struct vnode *)fp->f_data; 2075 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2076 error = ESPIPE; 2077 goto out; 2078 } 2079 2080 offset = SCARG(uap, offset); 2081 2082 /* 2083 * XXX This works because no file systems actually 2084 * XXX take any action on the seek operation. 2085 */ 2086 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2087 goto out; 2088 2089 /* dofilewrite() will unuse the descriptor for us */ 2090 return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 2091 &offset, 0, retval)); 2092 2093 out: 2094 FILE_UNUSE(fp, p); 2095 return (error); 2096 } 2097 2098 /* 2099 * Positional gather write system call. 2100 */ 2101 int 2102 sys_pwritev(l, v, retval) 2103 struct lwp *l; 2104 void *v; 2105 register_t *retval; 2106 { 2107 struct sys_pwritev_args /* { 2108 syscallarg(int) fd; 2109 syscallarg(const struct iovec *) iovp; 2110 syscallarg(int) iovcnt; 2111 syscallarg(off_t) offset; 2112 } */ *uap = v; 2113 struct proc *p = l->l_proc; 2114 struct filedesc *fdp = p->p_fd; 2115 struct file *fp; 2116 struct vnode *vp; 2117 off_t offset; 2118 int error, fd = SCARG(uap, fd); 2119 2120 if ((fp = fd_getfile(fdp, fd)) == NULL) 2121 return (EBADF); 2122 2123 if ((fp->f_flag & FWRITE) == 0) { 2124 simple_unlock(&fp->f_slock); 2125 return (EBADF); 2126 } 2127 2128 FILE_USE(fp); 2129 2130 vp = (struct vnode *)fp->f_data; 2131 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2132 error = ESPIPE; 2133 goto out; 2134 } 2135 2136 offset = SCARG(uap, offset); 2137 2138 /* 2139 * XXX This works because no file systems actually 2140 * XXX take any action on the seek operation. 2141 */ 2142 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2143 goto out; 2144 2145 /* dofilewritev() will unuse the descriptor for us */ 2146 return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2147 &offset, 0, retval)); 2148 2149 out: 2150 FILE_UNUSE(fp, p); 2151 return (error); 2152 } 2153 2154 /* 2155 * Check access permissions. 2156 */ 2157 int 2158 sys_access(l, v, retval) 2159 struct lwp *l; 2160 void *v; 2161 register_t *retval; 2162 { 2163 struct sys_access_args /* { 2164 syscallarg(const char *) path; 2165 syscallarg(int) flags; 2166 } */ *uap = v; 2167 struct proc *p = l->l_proc; 2168 struct ucred *cred; 2169 struct vnode *vp; 2170 int error, flags; 2171 struct nameidata nd; 2172 2173 cred = crdup(p->p_ucred); 2174 cred->cr_uid = p->p_cred->p_ruid; 2175 cred->cr_gid = p->p_cred->p_rgid; 2176 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2177 SCARG(uap, path), p); 2178 /* Override default credentials */ 2179 nd.ni_cnd.cn_cred = cred; 2180 if ((error = namei(&nd)) != 0) 2181 goto out; 2182 vp = nd.ni_vp; 2183 2184 /* Flags == 0 means only check for existence. */ 2185 if (SCARG(uap, flags)) { 2186 flags = 0; 2187 if (SCARG(uap, flags) & R_OK) 2188 flags |= VREAD; 2189 if (SCARG(uap, flags) & W_OK) 2190 flags |= VWRITE; 2191 if (SCARG(uap, flags) & X_OK) 2192 flags |= VEXEC; 2193 2194 error = VOP_ACCESS(vp, flags, cred, p); 2195 if (!error && (flags & VWRITE)) 2196 error = vn_writechk(vp); 2197 } 2198 vput(vp); 2199 out: 2200 crfree(cred); 2201 return (error); 2202 } 2203 2204 /* 2205 * Get file status; this version follows links. 2206 */ 2207 /* ARGSUSED */ 2208 int 2209 sys___stat13(l, v, retval) 2210 struct lwp *l; 2211 void *v; 2212 register_t *retval; 2213 { 2214 struct sys___stat13_args /* { 2215 syscallarg(const char *) path; 2216 syscallarg(struct stat *) ub; 2217 } */ *uap = v; 2218 struct proc *p = l->l_proc; 2219 struct stat sb; 2220 int error; 2221 struct nameidata nd; 2222 2223 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2224 SCARG(uap, path), p); 2225 if ((error = namei(&nd)) != 0) 2226 return (error); 2227 error = vn_stat(nd.ni_vp, &sb, p); 2228 vput(nd.ni_vp); 2229 if (error) 2230 return (error); 2231 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2232 return (error); 2233 } 2234 2235 /* 2236 * Get file status; this version does not follow links. 2237 */ 2238 /* ARGSUSED */ 2239 int 2240 sys___lstat13(l, v, retval) 2241 struct lwp *l; 2242 void *v; 2243 register_t *retval; 2244 { 2245 struct sys___lstat13_args /* { 2246 syscallarg(const char *) path; 2247 syscallarg(struct stat *) ub; 2248 } */ *uap = v; 2249 struct proc *p = l->l_proc; 2250 struct stat sb; 2251 int error; 2252 struct nameidata nd; 2253 2254 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2255 SCARG(uap, path), p); 2256 if ((error = namei(&nd)) != 0) 2257 return (error); 2258 error = vn_stat(nd.ni_vp, &sb, p); 2259 vput(nd.ni_vp); 2260 if (error) 2261 return (error); 2262 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2263 return (error); 2264 } 2265 2266 /* 2267 * Get configurable pathname variables. 2268 */ 2269 /* ARGSUSED */ 2270 int 2271 sys_pathconf(l, v, retval) 2272 struct lwp *l; 2273 void *v; 2274 register_t *retval; 2275 { 2276 struct sys_pathconf_args /* { 2277 syscallarg(const char *) path; 2278 syscallarg(int) name; 2279 } */ *uap = v; 2280 struct proc *p = l->l_proc; 2281 int error; 2282 struct nameidata nd; 2283 2284 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2285 SCARG(uap, path), p); 2286 if ((error = namei(&nd)) != 0) 2287 return (error); 2288 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval); 2289 vput(nd.ni_vp); 2290 return (error); 2291 } 2292 2293 /* 2294 * Return target name of a symbolic link. 2295 */ 2296 /* ARGSUSED */ 2297 int 2298 sys_readlink(l, v, retval) 2299 struct lwp *l; 2300 void *v; 2301 register_t *retval; 2302 { 2303 struct sys_readlink_args /* { 2304 syscallarg(const char *) path; 2305 syscallarg(char *) buf; 2306 syscallarg(size_t) count; 2307 } */ *uap = v; 2308 struct proc *p = l->l_proc; 2309 struct vnode *vp; 2310 struct iovec aiov; 2311 struct uio auio; 2312 int error; 2313 struct nameidata nd; 2314 2315 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2316 SCARG(uap, path), p); 2317 if ((error = namei(&nd)) != 0) 2318 return (error); 2319 vp = nd.ni_vp; 2320 if (vp->v_type != VLNK) 2321 error = EINVAL; 2322 else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) || 2323 (error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) == 0) { 2324 aiov.iov_base = SCARG(uap, buf); 2325 aiov.iov_len = SCARG(uap, count); 2326 auio.uio_iov = &aiov; 2327 auio.uio_iovcnt = 1; 2328 auio.uio_offset = 0; 2329 auio.uio_rw = UIO_READ; 2330 auio.uio_segflg = UIO_USERSPACE; 2331 auio.uio_procp = p; 2332 auio.uio_resid = SCARG(uap, count); 2333 error = VOP_READLINK(vp, &auio, p->p_ucred); 2334 } 2335 vput(vp); 2336 *retval = SCARG(uap, count) - auio.uio_resid; 2337 return (error); 2338 } 2339 2340 /* 2341 * Change flags of a file given a path name. 2342 */ 2343 /* ARGSUSED */ 2344 int 2345 sys_chflags(l, v, retval) 2346 struct lwp *l; 2347 void *v; 2348 register_t *retval; 2349 { 2350 struct sys_chflags_args /* { 2351 syscallarg(const char *) path; 2352 syscallarg(u_long) flags; 2353 } */ *uap = v; 2354 struct proc *p = l->l_proc; 2355 struct vnode *vp; 2356 int error; 2357 struct nameidata nd; 2358 2359 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2360 if ((error = namei(&nd)) != 0) 2361 return (error); 2362 vp = nd.ni_vp; 2363 error = change_flags(vp, SCARG(uap, flags), p); 2364 vput(vp); 2365 return (error); 2366 } 2367 2368 /* 2369 * Change flags of a file given a file descriptor. 2370 */ 2371 /* ARGSUSED */ 2372 int 2373 sys_fchflags(l, v, retval) 2374 struct lwp *l; 2375 void *v; 2376 register_t *retval; 2377 { 2378 struct sys_fchflags_args /* { 2379 syscallarg(int) fd; 2380 syscallarg(u_long) flags; 2381 } */ *uap = v; 2382 struct proc *p = l->l_proc; 2383 struct vnode *vp; 2384 struct file *fp; 2385 int error; 2386 2387 /* getvnode() will use the descriptor for us */ 2388 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2389 return (error); 2390 vp = (struct vnode *)fp->f_data; 2391 error = change_flags(vp, SCARG(uap, flags), p); 2392 VOP_UNLOCK(vp, 0); 2393 FILE_UNUSE(fp, p); 2394 return (error); 2395 } 2396 2397 /* 2398 * Change flags of a file given a path name; this version does 2399 * not follow links. 2400 */ 2401 int 2402 sys_lchflags(l, v, retval) 2403 struct lwp *l; 2404 void *v; 2405 register_t *retval; 2406 { 2407 struct sys_lchflags_args /* { 2408 syscallarg(const char *) path; 2409 syscallarg(u_long) flags; 2410 } */ *uap = v; 2411 struct proc *p = l->l_proc; 2412 struct vnode *vp; 2413 int error; 2414 struct nameidata nd; 2415 2416 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2417 if ((error = namei(&nd)) != 0) 2418 return (error); 2419 vp = nd.ni_vp; 2420 error = change_flags(vp, SCARG(uap, flags), p); 2421 vput(vp); 2422 return (error); 2423 } 2424 2425 /* 2426 * Common routine to change flags of a file. 2427 */ 2428 int 2429 change_flags(vp, flags, p) 2430 struct vnode *vp; 2431 u_long flags; 2432 struct proc *p; 2433 { 2434 struct mount *mp; 2435 struct vattr vattr; 2436 int error; 2437 2438 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2439 return (error); 2440 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2441 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2442 /* 2443 * Non-superusers cannot change the flags on devices, even if they 2444 * own them. 2445 */ 2446 if (suser(p->p_ucred, &p->p_acflag) != 0) { 2447 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2448 goto out; 2449 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 2450 error = EINVAL; 2451 goto out; 2452 } 2453 } 2454 VATTR_NULL(&vattr); 2455 vattr.va_flags = flags; 2456 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2457 out: 2458 vn_finished_write(mp, 0); 2459 return (error); 2460 } 2461 2462 /* 2463 * Change mode of a file given path name; this version follows links. 2464 */ 2465 /* ARGSUSED */ 2466 int 2467 sys_chmod(l, v, retval) 2468 struct lwp *l; 2469 void *v; 2470 register_t *retval; 2471 { 2472 struct sys_chmod_args /* { 2473 syscallarg(const char *) path; 2474 syscallarg(int) mode; 2475 } */ *uap = v; 2476 struct proc *p = l->l_proc; 2477 int error; 2478 struct nameidata nd; 2479 2480 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2481 if ((error = namei(&nd)) != 0) 2482 return (error); 2483 2484 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2485 2486 vrele(nd.ni_vp); 2487 return (error); 2488 } 2489 2490 /* 2491 * Change mode of a file given a file descriptor. 2492 */ 2493 /* ARGSUSED */ 2494 int 2495 sys_fchmod(l, v, retval) 2496 struct lwp *l; 2497 void *v; 2498 register_t *retval; 2499 { 2500 struct sys_fchmod_args /* { 2501 syscallarg(int) fd; 2502 syscallarg(int) mode; 2503 } */ *uap = v; 2504 struct proc *p = l->l_proc; 2505 struct file *fp; 2506 int error; 2507 2508 /* getvnode() will use the descriptor for us */ 2509 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2510 return (error); 2511 2512 error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), p); 2513 FILE_UNUSE(fp, p); 2514 return (error); 2515 } 2516 2517 /* 2518 * Change mode of a file given path name; this version does not follow links. 2519 */ 2520 /* ARGSUSED */ 2521 int 2522 sys_lchmod(l, v, retval) 2523 struct lwp *l; 2524 void *v; 2525 register_t *retval; 2526 { 2527 struct sys_lchmod_args /* { 2528 syscallarg(const char *) path; 2529 syscallarg(int) mode; 2530 } */ *uap = v; 2531 struct proc *p = l->l_proc; 2532 int error; 2533 struct nameidata nd; 2534 2535 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2536 if ((error = namei(&nd)) != 0) 2537 return (error); 2538 2539 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2540 2541 vrele(nd.ni_vp); 2542 return (error); 2543 } 2544 2545 /* 2546 * Common routine to set mode given a vnode. 2547 */ 2548 static int 2549 change_mode(vp, mode, p) 2550 struct vnode *vp; 2551 int mode; 2552 struct proc *p; 2553 { 2554 struct mount *mp; 2555 struct vattr vattr; 2556 int error; 2557 2558 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2559 return (error); 2560 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2561 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2562 VATTR_NULL(&vattr); 2563 vattr.va_mode = mode & ALLPERMS; 2564 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2565 VOP_UNLOCK(vp, 0); 2566 vn_finished_write(mp, 0); 2567 return (error); 2568 } 2569 2570 /* 2571 * Set ownership given a path name; this version follows links. 2572 */ 2573 /* ARGSUSED */ 2574 int 2575 sys_chown(l, v, retval) 2576 struct lwp *l; 2577 void *v; 2578 register_t *retval; 2579 { 2580 struct sys_chown_args /* { 2581 syscallarg(const char *) path; 2582 syscallarg(uid_t) uid; 2583 syscallarg(gid_t) gid; 2584 } */ *uap = v; 2585 struct proc *p = l->l_proc; 2586 int error; 2587 struct nameidata nd; 2588 2589 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2590 if ((error = namei(&nd)) != 0) 2591 return (error); 2592 2593 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2594 2595 vrele(nd.ni_vp); 2596 return (error); 2597 } 2598 2599 /* 2600 * Set ownership given a path name; this version follows links. 2601 * Provides POSIX semantics. 2602 */ 2603 /* ARGSUSED */ 2604 int 2605 sys___posix_chown(l, v, retval) 2606 struct lwp *l; 2607 void *v; 2608 register_t *retval; 2609 { 2610 struct sys_chown_args /* { 2611 syscallarg(const char *) path; 2612 syscallarg(uid_t) uid; 2613 syscallarg(gid_t) gid; 2614 } */ *uap = v; 2615 struct proc *p = l->l_proc; 2616 int error; 2617 struct nameidata nd; 2618 2619 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2620 if ((error = namei(&nd)) != 0) 2621 return (error); 2622 2623 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2624 2625 vrele(nd.ni_vp); 2626 return (error); 2627 } 2628 2629 /* 2630 * Set ownership given a file descriptor. 2631 */ 2632 /* ARGSUSED */ 2633 int 2634 sys_fchown(l, v, retval) 2635 struct lwp *l; 2636 void *v; 2637 register_t *retval; 2638 { 2639 struct sys_fchown_args /* { 2640 syscallarg(int) fd; 2641 syscallarg(uid_t) uid; 2642 syscallarg(gid_t) gid; 2643 } */ *uap = v; 2644 struct proc *p = l->l_proc; 2645 int error; 2646 struct file *fp; 2647 2648 /* getvnode() will use the descriptor for us */ 2649 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2650 return (error); 2651 2652 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2653 SCARG(uap, gid), p, 0); 2654 FILE_UNUSE(fp, p); 2655 return (error); 2656 } 2657 2658 /* 2659 * Set ownership given a file descriptor, providing POSIX/XPG semantics. 2660 */ 2661 /* ARGSUSED */ 2662 int 2663 sys___posix_fchown(l, v, retval) 2664 struct lwp *l; 2665 void *v; 2666 register_t *retval; 2667 { 2668 struct sys_fchown_args /* { 2669 syscallarg(int) fd; 2670 syscallarg(uid_t) uid; 2671 syscallarg(gid_t) gid; 2672 } */ *uap = v; 2673 struct proc *p = l->l_proc; 2674 int error; 2675 struct file *fp; 2676 2677 /* getvnode() will use the descriptor for us */ 2678 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2679 return (error); 2680 2681 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2682 SCARG(uap, gid), p, 1); 2683 FILE_UNUSE(fp, p); 2684 return (error); 2685 } 2686 2687 /* 2688 * Set ownership given a path name; this version does not follow links. 2689 */ 2690 /* ARGSUSED */ 2691 int 2692 sys_lchown(l, v, retval) 2693 struct lwp *l; 2694 void *v; 2695 register_t *retval; 2696 { 2697 struct sys_lchown_args /* { 2698 syscallarg(const char *) path; 2699 syscallarg(uid_t) uid; 2700 syscallarg(gid_t) gid; 2701 } */ *uap = v; 2702 struct proc *p = l->l_proc; 2703 int error; 2704 struct nameidata nd; 2705 2706 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2707 if ((error = namei(&nd)) != 0) 2708 return (error); 2709 2710 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2711 2712 vrele(nd.ni_vp); 2713 return (error); 2714 } 2715 2716 /* 2717 * Set ownership given a path name; this version does not follow links. 2718 * Provides POSIX/XPG semantics. 2719 */ 2720 /* ARGSUSED */ 2721 int 2722 sys___posix_lchown(l, v, retval) 2723 struct lwp *l; 2724 void *v; 2725 register_t *retval; 2726 { 2727 struct sys_lchown_args /* { 2728 syscallarg(const char *) path; 2729 syscallarg(uid_t) uid; 2730 syscallarg(gid_t) gid; 2731 } */ *uap = v; 2732 struct proc *p = l->l_proc; 2733 int error; 2734 struct nameidata nd; 2735 2736 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2737 if ((error = namei(&nd)) != 0) 2738 return (error); 2739 2740 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2741 2742 vrele(nd.ni_vp); 2743 return (error); 2744 } 2745 2746 /* 2747 * Common routine to set ownership given a vnode. 2748 */ 2749 static int 2750 change_owner(vp, uid, gid, p, posix_semantics) 2751 struct vnode *vp; 2752 uid_t uid; 2753 gid_t gid; 2754 struct proc *p; 2755 int posix_semantics; 2756 { 2757 struct mount *mp; 2758 struct vattr vattr; 2759 mode_t newmode; 2760 int error; 2761 2762 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2763 return (error); 2764 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2765 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2766 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2767 goto out; 2768 2769 #define CHANGED(x) ((int)(x) != -1) 2770 newmode = vattr.va_mode; 2771 if (posix_semantics) { 2772 /* 2773 * POSIX/XPG semantics: if the caller is not the super-user, 2774 * clear set-user-id and set-group-id bits. Both POSIX and 2775 * the XPG consider the behaviour for calls by the super-user 2776 * implementation-defined; we leave the set-user-id and set- 2777 * group-id settings intact in that case. 2778 */ 2779 if (suser(p->p_ucred, NULL) != 0) 2780 newmode &= ~(S_ISUID | S_ISGID); 2781 } else { 2782 /* 2783 * NetBSD semantics: when changing owner and/or group, 2784 * clear the respective bit(s). 2785 */ 2786 if (CHANGED(uid)) 2787 newmode &= ~S_ISUID; 2788 if (CHANGED(gid)) 2789 newmode &= ~S_ISGID; 2790 } 2791 /* Update va_mode iff altered. */ 2792 if (vattr.va_mode == newmode) 2793 newmode = VNOVAL; 2794 2795 VATTR_NULL(&vattr); 2796 vattr.va_uid = CHANGED(uid) ? uid : (uid_t)VNOVAL; 2797 vattr.va_gid = CHANGED(gid) ? gid : (gid_t)VNOVAL; 2798 vattr.va_mode = newmode; 2799 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2800 #undef CHANGED 2801 2802 out: 2803 VOP_UNLOCK(vp, 0); 2804 vn_finished_write(mp, 0); 2805 return (error); 2806 } 2807 2808 /* 2809 * Set the access and modification times given a path name; this 2810 * version follows links. 2811 */ 2812 /* ARGSUSED */ 2813 int 2814 sys_utimes(l, v, retval) 2815 struct lwp *l; 2816 void *v; 2817 register_t *retval; 2818 { 2819 struct sys_utimes_args /* { 2820 syscallarg(const char *) path; 2821 syscallarg(const struct timeval *) tptr; 2822 } */ *uap = v; 2823 struct proc *p = l->l_proc; 2824 int error; 2825 struct nameidata nd; 2826 2827 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2828 if ((error = namei(&nd)) != 0) 2829 return (error); 2830 2831 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2832 2833 vrele(nd.ni_vp); 2834 return (error); 2835 } 2836 2837 /* 2838 * Set the access and modification times given a file descriptor. 2839 */ 2840 /* ARGSUSED */ 2841 int 2842 sys_futimes(l, v, retval) 2843 struct lwp *l; 2844 void *v; 2845 register_t *retval; 2846 { 2847 struct sys_futimes_args /* { 2848 syscallarg(int) fd; 2849 syscallarg(const struct timeval *) tptr; 2850 } */ *uap = v; 2851 struct proc *p = l->l_proc; 2852 int error; 2853 struct file *fp; 2854 2855 /* getvnode() will use the descriptor for us */ 2856 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2857 return (error); 2858 2859 error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), p); 2860 FILE_UNUSE(fp, p); 2861 return (error); 2862 } 2863 2864 /* 2865 * Set the access and modification times given a path name; this 2866 * version does not follow links. 2867 */ 2868 /* ARGSUSED */ 2869 int 2870 sys_lutimes(l, v, retval) 2871 struct lwp *l; 2872 void *v; 2873 register_t *retval; 2874 { 2875 struct sys_lutimes_args /* { 2876 syscallarg(const char *) path; 2877 syscallarg(const struct timeval *) tptr; 2878 } */ *uap = v; 2879 struct proc *p = l->l_proc; 2880 int error; 2881 struct nameidata nd; 2882 2883 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2884 if ((error = namei(&nd)) != 0) 2885 return (error); 2886 2887 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2888 2889 vrele(nd.ni_vp); 2890 return (error); 2891 } 2892 2893 /* 2894 * Common routine to set access and modification times given a vnode. 2895 */ 2896 static int 2897 change_utimes(vp, tptr, p) 2898 struct vnode *vp; 2899 const struct timeval *tptr; 2900 struct proc *p; 2901 { 2902 struct timeval tv[2]; 2903 struct mount *mp; 2904 struct vattr vattr; 2905 int error; 2906 2907 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2908 return (error); 2909 VATTR_NULL(&vattr); 2910 if (tptr == NULL) { 2911 microtime(&tv[0]); 2912 tv[1] = tv[0]; 2913 vattr.va_vaflags |= VA_UTIMES_NULL; 2914 } else { 2915 error = copyin(tptr, tv, sizeof(tv)); 2916 if (error) 2917 goto out; 2918 } 2919 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2920 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2921 vattr.va_atime.tv_sec = tv[0].tv_sec; 2922 vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000; 2923 vattr.va_mtime.tv_sec = tv[1].tv_sec; 2924 vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000; 2925 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2926 VOP_UNLOCK(vp, 0); 2927 out: 2928 vn_finished_write(mp, 0); 2929 return (error); 2930 } 2931 2932 /* 2933 * Truncate a file given its path name. 2934 */ 2935 /* ARGSUSED */ 2936 int 2937 sys_truncate(l, v, retval) 2938 struct lwp *l; 2939 void *v; 2940 register_t *retval; 2941 { 2942 struct sys_truncate_args /* { 2943 syscallarg(const char *) path; 2944 syscallarg(int) pad; 2945 syscallarg(off_t) length; 2946 } */ *uap = v; 2947 struct proc *p = l->l_proc; 2948 struct vnode *vp; 2949 struct mount *mp; 2950 struct vattr vattr; 2951 int error; 2952 struct nameidata nd; 2953 2954 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2955 if ((error = namei(&nd)) != 0) 2956 return (error); 2957 vp = nd.ni_vp; 2958 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2959 vrele(vp); 2960 return (error); 2961 } 2962 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2963 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2964 if (vp->v_type == VDIR) 2965 error = EISDIR; 2966 else if ((error = vn_writechk(vp)) == 0 && 2967 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) { 2968 VATTR_NULL(&vattr); 2969 vattr.va_size = SCARG(uap, length); 2970 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2971 } 2972 vput(vp); 2973 vn_finished_write(mp, 0); 2974 return (error); 2975 } 2976 2977 /* 2978 * Truncate a file given a file descriptor. 2979 */ 2980 /* ARGSUSED */ 2981 int 2982 sys_ftruncate(l, v, retval) 2983 struct lwp *l; 2984 void *v; 2985 register_t *retval; 2986 { 2987 struct sys_ftruncate_args /* { 2988 syscallarg(int) fd; 2989 syscallarg(int) pad; 2990 syscallarg(off_t) length; 2991 } */ *uap = v; 2992 struct proc *p = l->l_proc; 2993 struct mount *mp; 2994 struct vattr vattr; 2995 struct vnode *vp; 2996 struct file *fp; 2997 int error; 2998 2999 /* getvnode() will use the descriptor for us */ 3000 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3001 return (error); 3002 if ((fp->f_flag & FWRITE) == 0) { 3003 error = EINVAL; 3004 goto out; 3005 } 3006 vp = (struct vnode *)fp->f_data; 3007 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3008 FILE_UNUSE(fp, p); 3009 return (error); 3010 } 3011 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3012 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3013 if (vp->v_type == VDIR) 3014 error = EISDIR; 3015 else if ((error = vn_writechk(vp)) == 0) { 3016 VATTR_NULL(&vattr); 3017 vattr.va_size = SCARG(uap, length); 3018 error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); 3019 } 3020 VOP_UNLOCK(vp, 0); 3021 vn_finished_write(mp, 0); 3022 out: 3023 FILE_UNUSE(fp, p); 3024 return (error); 3025 } 3026 3027 /* 3028 * Sync an open file. 3029 */ 3030 /* ARGSUSED */ 3031 int 3032 sys_fsync(l, v, retval) 3033 struct lwp *l; 3034 void *v; 3035 register_t *retval; 3036 { 3037 struct sys_fsync_args /* { 3038 syscallarg(int) fd; 3039 } */ *uap = v; 3040 struct proc *p = l->l_proc; 3041 struct vnode *vp; 3042 struct mount *mp; 3043 struct file *fp; 3044 int error; 3045 3046 /* getvnode() will use the descriptor for us */ 3047 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3048 return (error); 3049 vp = (struct vnode *)fp->f_data; 3050 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3051 FILE_UNUSE(fp, p); 3052 return (error); 3053 } 3054 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3055 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, p); 3056 if (error == 0 && bioops.io_fsync != NULL && 3057 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3058 (*bioops.io_fsync)(vp, 0); 3059 VOP_UNLOCK(vp, 0); 3060 vn_finished_write(mp, 0); 3061 FILE_UNUSE(fp, p); 3062 return (error); 3063 } 3064 3065 /* 3066 * Sync a range of file data. API modeled after that found in AIX. 3067 * 3068 * FDATASYNC indicates that we need only save enough metadata to be able 3069 * to re-read the written data. Note we duplicate AIX's requirement that 3070 * the file be open for writing. 3071 */ 3072 /* ARGSUSED */ 3073 int 3074 sys_fsync_range(l, v, retval) 3075 struct lwp *l; 3076 void *v; 3077 register_t *retval; 3078 { 3079 struct sys_fsync_range_args /* { 3080 syscallarg(int) fd; 3081 syscallarg(int) flags; 3082 syscallarg(off_t) start; 3083 syscallarg(int) length; 3084 } */ *uap = v; 3085 struct proc *p = l->l_proc; 3086 struct vnode *vp; 3087 struct file *fp; 3088 int flags, nflags; 3089 off_t s, e, len; 3090 int error; 3091 3092 /* getvnode() will use the descriptor for us */ 3093 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3094 return (error); 3095 3096 if ((fp->f_flag & FWRITE) == 0) { 3097 FILE_UNUSE(fp, p); 3098 return (EBADF); 3099 } 3100 3101 flags = SCARG(uap, flags); 3102 if (((flags & (FDATASYNC | FFILESYNC)) == 0) || 3103 ((~flags & (FDATASYNC | FFILESYNC)) == 0)) { 3104 return (EINVAL); 3105 } 3106 /* Now set up the flags for value(s) to pass to VOP_FSYNC() */ 3107 if (flags & FDATASYNC) 3108 nflags = FSYNC_DATAONLY | FSYNC_WAIT; 3109 else 3110 nflags = FSYNC_WAIT; 3111 if (flags & FDISKSYNC) 3112 nflags |= FSYNC_CACHE; 3113 3114 len = SCARG(uap, length); 3115 /* If length == 0, we do the whole file, and s = l = 0 will do that */ 3116 if (len) { 3117 s = SCARG(uap, start); 3118 e = s + len; 3119 if (e < s) { 3120 FILE_UNUSE(fp, p); 3121 return (EINVAL); 3122 } 3123 } else { 3124 e = 0; 3125 s = 0; 3126 } 3127 3128 vp = (struct vnode *)fp->f_data; 3129 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3130 error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, p); 3131 3132 if (error == 0 && bioops.io_fsync != NULL && 3133 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3134 (*bioops.io_fsync)(vp, nflags); 3135 3136 VOP_UNLOCK(vp, 0); 3137 FILE_UNUSE(fp, p); 3138 return (error); 3139 } 3140 3141 /* 3142 * Sync the data of an open file. 3143 */ 3144 /* ARGSUSED */ 3145 int 3146 sys_fdatasync(l, v, retval) 3147 struct lwp *l; 3148 void *v; 3149 register_t *retval; 3150 { 3151 struct sys_fdatasync_args /* { 3152 syscallarg(int) fd; 3153 } */ *uap = v; 3154 struct proc *p = l->l_proc; 3155 struct vnode *vp; 3156 struct file *fp; 3157 int error; 3158 3159 /* getvnode() will use the descriptor for us */ 3160 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3161 return (error); 3162 if ((fp->f_flag & FWRITE) == 0) { 3163 FILE_UNUSE(fp, p); 3164 return (EBADF); 3165 } 3166 vp = (struct vnode *)fp->f_data; 3167 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3168 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, p); 3169 VOP_UNLOCK(vp, 0); 3170 FILE_UNUSE(fp, p); 3171 return (error); 3172 } 3173 3174 /* 3175 * Rename files, (standard) BSD semantics frontend. 3176 */ 3177 /* ARGSUSED */ 3178 int 3179 sys_rename(l, v, retval) 3180 struct lwp *l; 3181 void *v; 3182 register_t *retval; 3183 { 3184 struct sys_rename_args /* { 3185 syscallarg(const char *) from; 3186 syscallarg(const char *) to; 3187 } */ *uap = v; 3188 struct proc *p = l->l_proc; 3189 3190 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 0)); 3191 } 3192 3193 /* 3194 * Rename files, POSIX semantics frontend. 3195 */ 3196 /* ARGSUSED */ 3197 int 3198 sys___posix_rename(l, v, retval) 3199 struct lwp *l; 3200 void *v; 3201 register_t *retval; 3202 { 3203 struct sys___posix_rename_args /* { 3204 syscallarg(const char *) from; 3205 syscallarg(const char *) to; 3206 } */ *uap = v; 3207 struct proc *p = l->l_proc; 3208 3209 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 1)); 3210 } 3211 3212 /* 3213 * Rename files. Source and destination must either both be directories, 3214 * or both not be directories. If target is a directory, it must be empty. 3215 * If `from' and `to' refer to the same object, the value of the `retain' 3216 * argument is used to determine whether `from' will be 3217 * 3218 * (retain == 0) deleted unless `from' and `to' refer to the same 3219 * object in the file system's name space (BSD). 3220 * (retain == 1) always retained (POSIX). 3221 */ 3222 static int 3223 rename_files(from, to, p, retain) 3224 const char *from, *to; 3225 struct proc *p; 3226 int retain; 3227 { 3228 struct mount *mp = NULL; 3229 struct vnode *tvp, *fvp, *tdvp; 3230 struct nameidata fromnd, tond; 3231 int error; 3232 3233 NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, 3234 from, p); 3235 if ((error = namei(&fromnd)) != 0) 3236 return (error); 3237 fvp = fromnd.ni_vp; 3238 error = vn_start_write(fvp, &mp, V_WAIT | V_PCATCH); 3239 if (error != 0) { 3240 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3241 vrele(fromnd.ni_dvp); 3242 vrele(fvp); 3243 if (fromnd.ni_startdir) 3244 vrele(fromnd.ni_startdir); 3245 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3246 return (error); 3247 } 3248 NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | 3249 (fvp->v_type == VDIR ? CREATEDIR : 0), UIO_USERSPACE, to, p); 3250 if ((error = namei(&tond)) != 0) { 3251 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3252 vrele(fromnd.ni_dvp); 3253 vrele(fvp); 3254 goto out1; 3255 } 3256 tdvp = tond.ni_dvp; 3257 tvp = tond.ni_vp; 3258 3259 if (tvp != NULL) { 3260 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 3261 error = ENOTDIR; 3262 goto out; 3263 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 3264 error = EISDIR; 3265 goto out; 3266 } 3267 } 3268 3269 if (fvp == tdvp) 3270 error = EINVAL; 3271 3272 /* 3273 * Source and destination refer to the same object. 3274 */ 3275 if (fvp == tvp) { 3276 if (retain) 3277 error = -1; 3278 else if (fromnd.ni_dvp == tdvp && 3279 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 3280 !memcmp(fromnd.ni_cnd.cn_nameptr, 3281 tond.ni_cnd.cn_nameptr, 3282 fromnd.ni_cnd.cn_namelen)) 3283 error = -1; 3284 } 3285 3286 #ifdef VERIFIED_EXEC 3287 if (!error) 3288 error = veriexec_renamechk(fvp, fromnd.ni_dirp, tond.ni_dirp); 3289 #endif /* VERIFIED_EXEC */ 3290 3291 out: 3292 if (!error) { 3293 VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE); 3294 if (fromnd.ni_dvp != tdvp) 3295 VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3296 if (tvp) { 3297 VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE); 3298 } 3299 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 3300 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 3301 } else { 3302 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 3303 if (tdvp == tvp) 3304 vrele(tdvp); 3305 else 3306 vput(tdvp); 3307 if (tvp) 3308 vput(tvp); 3309 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3310 vrele(fromnd.ni_dvp); 3311 vrele(fvp); 3312 } 3313 vrele(tond.ni_startdir); 3314 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 3315 out1: 3316 vn_finished_write(mp, 0); 3317 if (fromnd.ni_startdir) 3318 vrele(fromnd.ni_startdir); 3319 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3320 return (error == -1 ? 0 : error); 3321 } 3322 3323 /* 3324 * Make a directory file. 3325 */ 3326 /* ARGSUSED */ 3327 int 3328 sys_mkdir(l, v, retval) 3329 struct lwp *l; 3330 void *v; 3331 register_t *retval; 3332 { 3333 struct sys_mkdir_args /* { 3334 syscallarg(const char *) path; 3335 syscallarg(int) mode; 3336 } */ *uap = v; 3337 struct proc *p = l->l_proc; 3338 struct mount *mp; 3339 struct vnode *vp; 3340 struct vattr vattr; 3341 int error; 3342 struct nameidata nd; 3343 3344 restart: 3345 NDINIT(&nd, CREATE, LOCKPARENT | CREATEDIR, UIO_USERSPACE, 3346 SCARG(uap, path), p); 3347 if ((error = namei(&nd)) != 0) 3348 return (error); 3349 vp = nd.ni_vp; 3350 if (vp != NULL) { 3351 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3352 if (nd.ni_dvp == vp) 3353 vrele(nd.ni_dvp); 3354 else 3355 vput(nd.ni_dvp); 3356 vrele(vp); 3357 return (EEXIST); 3358 } 3359 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3360 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3361 if (nd.ni_dvp == vp) 3362 vrele(nd.ni_dvp); 3363 else 3364 vput(nd.ni_dvp); 3365 if ((error = vn_start_write(NULL, &mp, 3366 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3367 return (error); 3368 goto restart; 3369 } 3370 VATTR_NULL(&vattr); 3371 vattr.va_type = VDIR; 3372 vattr.va_mode = 3373 (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask; 3374 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3375 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 3376 if (!error) 3377 vput(nd.ni_vp); 3378 vn_finished_write(mp, 0); 3379 return (error); 3380 } 3381 3382 /* 3383 * Remove a directory file. 3384 */ 3385 /* ARGSUSED */ 3386 int 3387 sys_rmdir(l, v, retval) 3388 struct lwp *l; 3389 void *v; 3390 register_t *retval; 3391 { 3392 struct sys_rmdir_args /* { 3393 syscallarg(const char *) path; 3394 } */ *uap = v; 3395 struct proc *p = l->l_proc; 3396 struct mount *mp; 3397 struct vnode *vp; 3398 int error; 3399 struct nameidata nd; 3400 3401 restart: 3402 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 3403 SCARG(uap, path), p); 3404 if ((error = namei(&nd)) != 0) 3405 return (error); 3406 vp = nd.ni_vp; 3407 if (vp->v_type != VDIR) { 3408 error = ENOTDIR; 3409 goto out; 3410 } 3411 /* 3412 * No rmdir "." please. 3413 */ 3414 if (nd.ni_dvp == vp) { 3415 error = EINVAL; 3416 goto out; 3417 } 3418 /* 3419 * The root of a mounted filesystem cannot be deleted. 3420 */ 3421 if (vp->v_flag & VROOT) { 3422 error = EBUSY; 3423 goto out; 3424 } 3425 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3426 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3427 if (nd.ni_dvp == vp) 3428 vrele(nd.ni_dvp); 3429 else 3430 vput(nd.ni_dvp); 3431 vput(vp); 3432 if ((error = vn_start_write(NULL, &mp, 3433 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3434 return (error); 3435 goto restart; 3436 } 3437 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3438 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3439 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 3440 vn_finished_write(mp, 0); 3441 return (error); 3442 3443 out: 3444 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3445 if (nd.ni_dvp == vp) 3446 vrele(nd.ni_dvp); 3447 else 3448 vput(nd.ni_dvp); 3449 vput(vp); 3450 return (error); 3451 } 3452 3453 /* 3454 * Read a block of directory entries in a file system independent format. 3455 */ 3456 int 3457 sys_getdents(l, v, retval) 3458 struct lwp *l; 3459 void *v; 3460 register_t *retval; 3461 { 3462 struct sys_getdents_args /* { 3463 syscallarg(int) fd; 3464 syscallarg(char *) buf; 3465 syscallarg(size_t) count; 3466 } */ *uap = v; 3467 struct proc *p = l->l_proc; 3468 struct file *fp; 3469 int error, done; 3470 3471 /* getvnode() will use the descriptor for us */ 3472 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3473 return (error); 3474 if ((fp->f_flag & FREAD) == 0) { 3475 error = EBADF; 3476 goto out; 3477 } 3478 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 3479 SCARG(uap, count), &done, p, 0, 0); 3480 #ifdef KTRACE 3481 if (!error && KTRPOINT(p, KTR_GENIO)) { 3482 struct iovec iov; 3483 iov.iov_base = SCARG(uap, buf); 3484 iov.iov_len = done; 3485 ktrgenio(p, SCARG(uap, fd), UIO_READ, &iov, done, 0); 3486 } 3487 #endif 3488 *retval = done; 3489 out: 3490 FILE_UNUSE(fp, p); 3491 return (error); 3492 } 3493 3494 /* 3495 * Set the mode mask for creation of filesystem nodes. 3496 */ 3497 int 3498 sys_umask(l, v, retval) 3499 struct lwp *l; 3500 void *v; 3501 register_t *retval; 3502 { 3503 struct sys_umask_args /* { 3504 syscallarg(mode_t) newmask; 3505 } */ *uap = v; 3506 struct proc *p = l->l_proc; 3507 struct cwdinfo *cwdi; 3508 3509 cwdi = p->p_cwdi; 3510 *retval = cwdi->cwdi_cmask; 3511 cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS; 3512 return (0); 3513 } 3514 3515 /* 3516 * Void all references to file by ripping underlying filesystem 3517 * away from vnode. 3518 */ 3519 /* ARGSUSED */ 3520 int 3521 sys_revoke(l, v, retval) 3522 struct lwp *l; 3523 void *v; 3524 register_t *retval; 3525 { 3526 struct sys_revoke_args /* { 3527 syscallarg(const char *) path; 3528 } */ *uap = v; 3529 struct proc *p = l->l_proc; 3530 struct mount *mp; 3531 struct vnode *vp; 3532 struct vattr vattr; 3533 int error; 3534 struct nameidata nd; 3535 3536 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3537 if ((error = namei(&nd)) != 0) 3538 return (error); 3539 vp = nd.ni_vp; 3540 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 3541 goto out; 3542 if (p->p_ucred->cr_uid != vattr.va_uid && 3543 (error = suser(p->p_ucred, &p->p_acflag)) != 0) 3544 goto out; 3545 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 3546 goto out; 3547 if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER))) 3548 VOP_REVOKE(vp, REVOKEALL); 3549 vn_finished_write(mp, 0); 3550 out: 3551 vrele(vp); 3552 return (error); 3553 } 3554 3555 /* 3556 * Convert a user file descriptor to a kernel file entry. 3557 */ 3558 int 3559 getvnode(fdp, fd, fpp) 3560 struct filedesc *fdp; 3561 int fd; 3562 struct file **fpp; 3563 { 3564 struct vnode *vp; 3565 struct file *fp; 3566 3567 if ((fp = fd_getfile(fdp, fd)) == NULL) 3568 return (EBADF); 3569 3570 FILE_USE(fp); 3571 3572 if (fp->f_type != DTYPE_VNODE) { 3573 FILE_UNUSE(fp, NULL); 3574 return (EINVAL); 3575 } 3576 3577 vp = (struct vnode *)fp->f_data; 3578 if (vp->v_type == VBAD) { 3579 FILE_UNUSE(fp, NULL); 3580 return (EBADF); 3581 } 3582 3583 *fpp = fp; 3584 return (0); 3585 } 3586 3587 /* 3588 * Push extended attribute configuration information into the VFS. 3589 * 3590 * NOTE: Not all file systems that support extended attributes will 3591 * require the use of this system call. 3592 */ 3593 int 3594 sys_extattrctl(struct lwp *l, void *v, register_t *retval) 3595 { 3596 struct sys_extattrctl_args /* { 3597 syscallarg(const char *) path; 3598 syscallarg(int) cmd; 3599 syscallarg(const char *) filename; 3600 syscallarg(int) attrnamespace; 3601 syscallarg(const char *) attrname; 3602 } */ *uap = v; 3603 struct proc *p = l->l_proc; 3604 struct vnode *vp; 3605 struct nameidata nd; 3606 struct mount *mp; 3607 char attrname[EXTATTR_MAXNAMELEN]; 3608 int error; 3609 3610 if (SCARG(uap, attrname) != NULL) { 3611 error = copyinstr(SCARG(uap, attrname), attrname, 3612 sizeof(attrname), NULL); 3613 if (error) 3614 return (error); 3615 } 3616 3617 vp = NULL; 3618 if (SCARG(uap, filename) != NULL) { 3619 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 3620 SCARG(uap, filename), p); 3621 error = namei(&nd); 3622 if (error) 3623 return (error); 3624 vp = nd.ni_vp; 3625 } 3626 3627 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3628 error = namei(&nd); 3629 if (error) { 3630 if (vp != NULL) 3631 vput(vp); 3632 return (error); 3633 } 3634 3635 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 3636 if (error) { 3637 if (vp != NULL) 3638 vput(vp); 3639 return (error); 3640 } 3641 3642 error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp, 3643 SCARG(uap, attrnamespace), 3644 SCARG(uap, attrname) != NULL ? attrname : NULL, p); 3645 3646 vn_finished_write(mp, 0); 3647 3648 if (vp != NULL) 3649 vrele(vp); 3650 3651 return (error); 3652 } 3653 3654 /* 3655 * Set a named extended attribute on a file or directory. 3656 */ 3657 static int 3658 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3659 const void *data, size_t nbytes, struct proc *p, register_t *retval) 3660 { 3661 struct mount *mp; 3662 struct uio auio; 3663 struct iovec aiov; 3664 ssize_t cnt; 3665 int error; 3666 3667 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3668 if (error) 3669 return (error); 3670 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3671 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3672 3673 aiov.iov_base = (caddr_t) data; /* XXX kills const */ 3674 aiov.iov_len = nbytes; 3675 auio.uio_iov = &aiov; 3676 auio.uio_iovcnt = 1; 3677 auio.uio_offset = 0; 3678 if (nbytes > INT_MAX) { 3679 error = EINVAL; 3680 goto done; 3681 } 3682 auio.uio_resid = nbytes; 3683 auio.uio_rw = UIO_WRITE; 3684 auio.uio_segflg = UIO_USERSPACE; 3685 auio.uio_procp = p; 3686 cnt = nbytes; 3687 3688 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, 3689 p->p_ucred, p); 3690 cnt -= auio.uio_resid; 3691 retval[0] = cnt; 3692 3693 done: 3694 VOP_UNLOCK(vp, 0); 3695 vn_finished_write(mp, 0); 3696 return (error); 3697 } 3698 3699 int 3700 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval) 3701 { 3702 struct sys_extattr_set_fd_args /* { 3703 syscallarg(int) fd; 3704 syscallarg(int) attrnamespace; 3705 syscallarg(const char *) attrname; 3706 syscallarg(const void *) data; 3707 syscallarg(size_t) nbytes; 3708 } */ *uap = v; 3709 struct proc *p = l->l_proc; 3710 struct file *fp; 3711 struct vnode *vp; 3712 char attrname[EXTATTR_MAXNAMELEN]; 3713 int error; 3714 3715 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3716 NULL); 3717 if (error) 3718 return (error); 3719 3720 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3721 if (error) 3722 return (error); 3723 vp = (struct vnode *) fp->f_data; 3724 3725 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, 3726 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3727 3728 FILE_UNUSE(fp, p); 3729 return (error); 3730 } 3731 3732 int 3733 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval) 3734 { 3735 struct sys_extattr_set_file_args /* { 3736 syscallarg(const char *) path; 3737 syscallarg(int) attrnamespace; 3738 syscallarg(const char *) attrname; 3739 syscallarg(const void *) data; 3740 syscallarg(size_t) nbytes; 3741 } */ *uap = v; 3742 struct proc *p = l->l_proc; 3743 struct nameidata nd; 3744 char attrname[EXTATTR_MAXNAMELEN]; 3745 int error; 3746 3747 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3748 NULL); 3749 if (error) 3750 return (error); 3751 3752 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3753 error = namei(&nd); 3754 if (error) 3755 return (error); 3756 3757 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3758 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3759 3760 vrele(nd.ni_vp); 3761 return (error); 3762 } 3763 3764 int 3765 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval) 3766 { 3767 struct sys_extattr_set_link_args /* { 3768 syscallarg(const char *) path; 3769 syscallarg(int) attrnamespace; 3770 syscallarg(const char *) attrname; 3771 syscallarg(const void *) data; 3772 syscallarg(size_t) nbytes; 3773 } */ *uap = v; 3774 struct proc *p = l->l_proc; 3775 struct nameidata nd; 3776 char attrname[EXTATTR_MAXNAMELEN]; 3777 int error; 3778 3779 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3780 NULL); 3781 if (error) 3782 return (error); 3783 3784 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3785 error = namei(&nd); 3786 if (error) 3787 return (error); 3788 3789 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3790 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3791 3792 vrele(nd.ni_vp); 3793 return (error); 3794 } 3795 3796 /* 3797 * Get a named extended attribute on a file or directory. 3798 */ 3799 static int 3800 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3801 void *data, size_t nbytes, struct proc *p, register_t *retval) 3802 { 3803 struct uio auio, *auiop; 3804 struct iovec aiov; 3805 ssize_t cnt; 3806 size_t size, *sizep; 3807 int error; 3808 3809 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 3810 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3811 3812 /* 3813 * Slightly unusual semantics: if the user provides a NULL data 3814 * pointer, they don't want to receive the data, just the maximum 3815 * read length. 3816 */ 3817 auiop = NULL; 3818 sizep = NULL; 3819 cnt = 0; 3820 if (data != NULL) { 3821 aiov.iov_base = data; 3822 aiov.iov_len = nbytes; 3823 auio.uio_iov = &aiov; 3824 auio.uio_offset = 0; 3825 if (nbytes > INT_MAX) { 3826 error = EINVAL; 3827 goto done; 3828 } 3829 auio.uio_resid = nbytes; 3830 auio.uio_rw = UIO_READ; 3831 auio.uio_segflg = UIO_USERSPACE; 3832 auio.uio_procp = p; 3833 auiop = &auio; 3834 cnt = nbytes; 3835 } else 3836 sizep = &size; 3837 3838 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, 3839 p->p_ucred, p); 3840 3841 if (auiop != NULL) { 3842 cnt -= auio.uio_resid; 3843 retval[0] = cnt; 3844 } else 3845 retval[0] = size; 3846 3847 done: 3848 VOP_UNLOCK(vp, 0); 3849 return (error); 3850 } 3851 3852 int 3853 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval) 3854 { 3855 struct sys_extattr_get_fd_args /* { 3856 syscallarg(int) fd; 3857 syscallarg(int) attrnamespace; 3858 syscallarg(const char *) attrname; 3859 syscallarg(void *) data; 3860 syscallarg(size_t) nbytes; 3861 } */ *uap = v; 3862 struct proc *p = l->l_proc; 3863 struct file *fp; 3864 struct vnode *vp; 3865 char attrname[EXTATTR_MAXNAMELEN]; 3866 int error; 3867 3868 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3869 NULL); 3870 if (error) 3871 return (error); 3872 3873 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3874 if (error) 3875 return (error); 3876 vp = (struct vnode *) fp->f_data; 3877 3878 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, 3879 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3880 3881 FILE_UNUSE(fp, p); 3882 return (error); 3883 } 3884 3885 int 3886 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval) 3887 { 3888 struct sys_extattr_get_file_args /* { 3889 syscallarg(const char *) path; 3890 syscallarg(int) attrnamespace; 3891 syscallarg(const char *) attrname; 3892 syscallarg(void *) data; 3893 syscallarg(size_t) nbytes; 3894 } */ *uap = v; 3895 struct proc *p = l->l_proc; 3896 struct nameidata nd; 3897 char attrname[EXTATTR_MAXNAMELEN]; 3898 int error; 3899 3900 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3901 NULL); 3902 if (error) 3903 return (error); 3904 3905 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3906 error = namei(&nd); 3907 if (error) 3908 return (error); 3909 3910 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3911 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3912 3913 vrele(nd.ni_vp); 3914 return (error); 3915 } 3916 3917 int 3918 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval) 3919 { 3920 struct sys_extattr_get_link_args /* { 3921 syscallarg(const char *) path; 3922 syscallarg(int) attrnamespace; 3923 syscallarg(const char *) attrname; 3924 syscallarg(void *) data; 3925 syscallarg(size_t) nbytes; 3926 } */ *uap = v; 3927 struct proc *p = l->l_proc; 3928 struct nameidata nd; 3929 char attrname[EXTATTR_MAXNAMELEN]; 3930 int error; 3931 3932 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3933 NULL); 3934 if (error) 3935 return (error); 3936 3937 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3938 error = namei(&nd); 3939 if (error) 3940 return (error); 3941 3942 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3943 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3944 3945 vrele(nd.ni_vp); 3946 return (error); 3947 } 3948 3949 /* 3950 * Delete a named extended attribute on a file or directory. 3951 */ 3952 static int 3953 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3954 struct proc *p) 3955 { 3956 struct mount *mp; 3957 int error; 3958 3959 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3960 if (error) 3961 return (error); 3962 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3963 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3964 3965 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, p->p_ucred, p); 3966 if (error == EOPNOTSUPP) 3967 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, 3968 p->p_ucred, p); 3969 3970 VOP_UNLOCK(vp, 0); 3971 vn_finished_write(mp, 0); 3972 return (error); 3973 } 3974 3975 int 3976 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval) 3977 { 3978 struct sys_extattr_delete_fd_args /* { 3979 syscallarg(int) fd; 3980 syscallarg(int) attrnamespace; 3981 syscallarg(const char *) attrname; 3982 } */ *uap = v; 3983 struct proc *p = l->l_proc; 3984 struct file *fp; 3985 struct vnode *vp; 3986 char attrname[EXTATTR_MAXNAMELEN]; 3987 int error; 3988 3989 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3990 NULL); 3991 if (error) 3992 return (error); 3993 3994 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3995 if (error) 3996 return (error); 3997 vp = (struct vnode *) fp->f_data; 3998 3999 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, p); 4000 4001 FILE_UNUSE(fp, p); 4002 return (error); 4003 } 4004 4005 int 4006 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval) 4007 { 4008 struct sys_extattr_delete_file_args /* { 4009 syscallarg(const char *) path; 4010 syscallarg(int) attrnamespace; 4011 syscallarg(const char *) attrname; 4012 } */ *uap = v; 4013 struct proc *p = l->l_proc; 4014 struct nameidata nd; 4015 char attrname[EXTATTR_MAXNAMELEN]; 4016 int error; 4017 4018 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4019 NULL); 4020 if (error) 4021 return (error); 4022 4023 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4024 error = namei(&nd); 4025 if (error) 4026 return (error); 4027 4028 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4029 p); 4030 4031 vrele(nd.ni_vp); 4032 return (error); 4033 } 4034 4035 int 4036 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval) 4037 { 4038 struct sys_extattr_delete_link_args /* { 4039 syscallarg(const char *) path; 4040 syscallarg(int) attrnamespace; 4041 syscallarg(const char *) attrname; 4042 } */ *uap = v; 4043 struct proc *p = l->l_proc; 4044 struct nameidata nd; 4045 char attrname[EXTATTR_MAXNAMELEN]; 4046 int error; 4047 4048 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4049 NULL); 4050 if (error) 4051 return (error); 4052 4053 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4054 error = namei(&nd); 4055 if (error) 4056 return (error); 4057 4058 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4059 p); 4060 4061 vrele(nd.ni_vp); 4062 return (error); 4063 } 4064 4065 /* 4066 * Retrieve a list of extended attributes on a file or directory. 4067 */ 4068 static int 4069 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, 4070 struct proc *p, register_t *retval) 4071 { 4072 struct uio auio, *auiop; 4073 size_t size, *sizep; 4074 struct iovec aiov; 4075 ssize_t cnt; 4076 int error; 4077 4078 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 4079 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 4080 4081 auiop = NULL; 4082 sizep = NULL; 4083 cnt = 0; 4084 if (data != NULL) { 4085 aiov.iov_base = data; 4086 aiov.iov_len = nbytes; 4087 auio.uio_iov = &aiov; 4088 auio.uio_offset = 0; 4089 if (nbytes > INT_MAX) { 4090 error = EINVAL; 4091 goto done; 4092 } 4093 auio.uio_resid = nbytes; 4094 auio.uio_rw = UIO_READ; 4095 auio.uio_segflg = UIO_USERSPACE; 4096 auio.uio_procp = p; 4097 auiop = &auio; 4098 cnt = nbytes; 4099 } else 4100 sizep = &size; 4101 4102 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, 4103 p->p_ucred, p); 4104 4105 if (auiop != NULL) { 4106 cnt -= auio.uio_resid; 4107 retval[0] = cnt; 4108 } else 4109 retval[0] = size; 4110 4111 done: 4112 VOP_UNLOCK(vp, 0); 4113 return (error); 4114 } 4115 4116 int 4117 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval) 4118 { 4119 struct sys_extattr_list_fd_args /* { 4120 syscallarg(int) fd; 4121 syscallarg(int) attrnamespace; 4122 syscallarg(void *) data; 4123 syscallarg(size_t) nbytes; 4124 } */ *uap = v; 4125 struct proc *p = l->l_proc; 4126 struct file *fp; 4127 struct vnode *vp; 4128 int error; 4129 4130 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 4131 if (error) 4132 return (error); 4133 vp = (struct vnode *) fp->f_data; 4134 4135 error = extattr_list_vp(vp, SCARG(uap, attrnamespace), 4136 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4137 4138 FILE_UNUSE(fp, p); 4139 return (error); 4140 } 4141 4142 int 4143 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval) 4144 { 4145 struct sys_extattr_list_file_args /* { 4146 syscallarg(const char *) path; 4147 syscallarg(int) attrnamespace; 4148 syscallarg(void *) data; 4149 syscallarg(size_t) nbytes; 4150 } */ *uap = v; 4151 struct proc *p = l->l_proc; 4152 struct nameidata nd; 4153 int error; 4154 4155 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4156 error = namei(&nd); 4157 if (error) 4158 return (error); 4159 4160 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4161 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4162 4163 vrele(nd.ni_vp); 4164 return (error); 4165 } 4166 4167 int 4168 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval) 4169 { 4170 struct sys_extattr_list_link_args /* { 4171 syscallarg(const char *) path; 4172 syscallarg(int) attrnamespace; 4173 syscallarg(void *) data; 4174 syscallarg(size_t) nbytes; 4175 } */ *uap = v; 4176 struct proc *p = l->l_proc; 4177 struct nameidata nd; 4178 int error; 4179 4180 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4181 error = namei(&nd); 4182 if (error) 4183 return (error); 4184 4185 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4186 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4187 4188 vrele(nd.ni_vp); 4189 return (error); 4190 } 4191
Indexes created Fri Oct 03 02:09:57 GMT 2025