vfs_syscalls.c revision 1.217.2.6
1 /* $NetBSD: vfs_syscalls.c,v 1.217.2.6 2005/09/02 12:16:17 tron 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 1.217.2.6 2005/09/02 12:16:17 tron Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_compat_43.h" 44 #include "opt_ktrace.h" 45 #include "fss.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/namei.h> 50 #include <sys/filedesc.h> 51 #include <sys/kernel.h> 52 #include <sys/file.h> 53 #include <sys/stat.h> 54 #include <sys/vnode.h> 55 #include <sys/mount.h> 56 #include <sys/proc.h> 57 #include <sys/uio.h> 58 #include <sys/malloc.h> 59 #include <sys/dirent.h> 60 #include <sys/extattr.h> 61 #include <sys/sysctl.h> 62 #include <sys/sa.h> 63 #include <sys/syscallargs.h> 64 #ifdef KTRACE 65 #include <sys/ktrace.h> 66 #endif 67 #ifdef VERIFIED_EXEC 68 #include <sys/verified_exec.h> 69 #endif /* VERIFIED_EXEC */ 70 71 #include <miscfs/genfs/genfs.h> 72 #include <miscfs/syncfs/syncfs.h> 73 74 #if NFSS > 0 75 #include <dev/fssvar.h> 76 #endif 77 78 MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct"); 79 80 static int change_dir(struct nameidata *, struct proc *); 81 static int change_flags(struct vnode *, u_long, struct proc *); 82 static int change_mode(struct vnode *, int, struct proc *p); 83 static int change_owner(struct vnode *, uid_t, gid_t, struct proc *, int); 84 static int change_utimes(struct vnode *vp, const struct timeval *, 85 struct proc *p); 86 static int rename_files(const char *, const char *, struct proc *, int); 87 88 void checkdirs(struct vnode *); 89 90 int dovfsusermount = 0; 91 92 /* 93 * Virtual File System System Calls 94 */ 95 96 /* 97 * Mount a file system. 98 */ 99 100 #if defined(COMPAT_09) || defined(COMPAT_43) 101 /* 102 * This table is used to maintain compatibility with 4.3BSD 103 * and NetBSD 0.9 mount syscalls. Note, the order is important! 104 * 105 * Do not modify this table. It should only contain filesystems 106 * supported by NetBSD 0.9 and 4.3BSD. 107 */ 108 const char * const mountcompatnames[] = { 109 NULL, /* 0 = MOUNT_NONE */ 110 MOUNT_FFS, /* 1 = MOUNT_UFS */ 111 MOUNT_NFS, /* 2 */ 112 MOUNT_MFS, /* 3 */ 113 MOUNT_MSDOS, /* 4 */ 114 MOUNT_CD9660, /* 5 = MOUNT_ISOFS */ 115 MOUNT_FDESC, /* 6 */ 116 MOUNT_KERNFS, /* 7 */ 117 NULL, /* 8 = MOUNT_DEVFS */ 118 MOUNT_AFS, /* 9 */ 119 }; 120 const int nmountcompatnames = sizeof(mountcompatnames) / 121 sizeof(mountcompatnames[0]); 122 #endif /* COMPAT_09 || COMPAT_43 */ 123 124 /* ARGSUSED */ 125 int 126 sys_mount(l, v, retval) 127 struct lwp *l; 128 void *v; 129 register_t *retval; 130 { 131 struct sys_mount_args /* { 132 syscallarg(const char *) type; 133 syscallarg(const char *) path; 134 syscallarg(int) flags; 135 syscallarg(void *) data; 136 } */ *uap = v; 137 struct proc *p = l->l_proc; 138 struct vnode *vp; 139 struct mount *mp; 140 int error, flag = 0; 141 char fstypename[MFSNAMELEN]; 142 struct vattr va; 143 struct nameidata nd; 144 struct vfsops *vfs; 145 146 /* 147 * if MNT_GETARGS is specified, it should be only flag. 148 */ 149 150 if ((SCARG(uap, flags) & MNT_GETARGS) != 0 && 151 (SCARG(uap, flags) & ~MNT_GETARGS) != 0) { 152 return EINVAL; 153 } 154 155 if (dovfsusermount == 0 && (SCARG(uap, flags) & MNT_GETARGS) == 0 && 156 (error = suser(p->p_ucred, &p->p_acflag))) 157 return (error); 158 /* 159 * Get vnode to be covered 160 */ 161 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 162 SCARG(uap, path), p); 163 if ((error = namei(&nd)) != 0) 164 return (error); 165 vp = nd.ni_vp; 166 /* 167 * A lookup in VFS_MOUNT might result in an attempt to 168 * lock this vnode again, so make the lock recursive. 169 */ 170 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE); 171 if (SCARG(uap, flags) & (MNT_UPDATE | MNT_GETARGS)) { 172 if ((vp->v_flag & VROOT) == 0) { 173 vput(vp); 174 return (EINVAL); 175 } 176 mp = vp->v_mount; 177 flag = mp->mnt_flag; 178 vfs = mp->mnt_op; 179 /* 180 * We only allow the filesystem to be reloaded if it 181 * is currently mounted read-only. 182 */ 183 if ((SCARG(uap, flags) & MNT_RELOAD) && 184 ((mp->mnt_flag & MNT_RDONLY) == 0)) { 185 vput(vp); 186 return (EOPNOTSUPP); /* Needs translation */ 187 } 188 /* 189 * In "highly secure" mode, don't let the caller do anything 190 * but downgrade a filesystem from read-write to read-only. 191 * (see also below; MNT_UPDATE or MNT_GETARGS is required.) 192 */ 193 if (securelevel >= 2 && 194 SCARG(uap, flags) != MNT_GETARGS && 195 SCARG(uap, flags) != 196 (mp->mnt_flag | MNT_RDONLY | 197 MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) { 198 vput(vp); 199 return (EPERM); 200 } 201 mp->mnt_flag |= SCARG(uap, flags) & 202 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 203 /* 204 * Only root, or the user that did the original mount is 205 * permitted to update it. 206 */ 207 if ((mp->mnt_flag & MNT_GETARGS) == 0 && 208 mp->mnt_stat.f_owner != p->p_ucred->cr_uid && 209 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 210 vput(vp); 211 return (error); 212 } 213 /* 214 * Do not allow NFS export by non-root users. For non-root 215 * users, silently enforce MNT_NOSUID and MNT_NODEV, and 216 * MNT_NOEXEC if mount point is already MNT_NOEXEC. 217 */ 218 if (p->p_ucred->cr_uid != 0) { 219 if (SCARG(uap, flags) & MNT_EXPORTED) { 220 vput(vp); 221 return (EPERM); 222 } 223 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 224 if (flag & MNT_NOEXEC) 225 SCARG(uap, flags) |= MNT_NOEXEC; 226 } 227 if (vfs_busy(mp, LK_NOWAIT, 0)) { 228 vput(vp); 229 return (EPERM); 230 } 231 goto update; 232 } else { 233 if (securelevel >= 2) { 234 vput(vp); 235 return (EPERM); 236 } 237 } 238 /* 239 * If the user is not root, ensure that they own the directory 240 * onto which we are attempting to mount. 241 */ 242 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0 || 243 (va.va_uid != p->p_ucred->cr_uid && 244 (error = suser(p->p_ucred, &p->p_acflag)) != 0)) { 245 vput(vp); 246 return (error); 247 } 248 /* 249 * Do not allow NFS export by non-root users. For non-root users, 250 * silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the 251 * mount point is already MNT_NOEXEC. 252 */ 253 if (p->p_ucred->cr_uid != 0) { 254 if (SCARG(uap, flags) & MNT_EXPORTED) { 255 vput(vp); 256 return (EPERM); 257 } 258 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 259 if (vp->v_mount->mnt_flag & MNT_NOEXEC) 260 SCARG(uap, flags) |= MNT_NOEXEC; 261 } 262 if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) { 263 vput(vp); 264 return (error); 265 } 266 if (vp->v_type != VDIR) { 267 vput(vp); 268 return (ENOTDIR); 269 } 270 error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL); 271 if (error) { 272 #if defined(COMPAT_09) || defined(COMPAT_43) 273 /* 274 * Historically filesystem types were identified by number. 275 * If we get an integer for the filesystem type instead of a 276 * string, we check to see if it matches one of the historic 277 * filesystem types. 278 */ 279 u_long fsindex = (u_long)SCARG(uap, type); 280 if (fsindex >= nmountcompatnames || 281 mountcompatnames[fsindex] == NULL) { 282 vput(vp); 283 return (ENODEV); 284 } 285 strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN); 286 #else 287 vput(vp); 288 return (error); 289 #endif 290 } 291 #ifdef COMPAT_10 292 /* Accept `ufs' as an alias for `ffs'. */ 293 if (!strncmp(fstypename, "ufs", MFSNAMELEN)) 294 strncpy(fstypename, "ffs", MFSNAMELEN); 295 #endif 296 if ((vfs = vfs_getopsbyname(fstypename)) == NULL) { 297 vput(vp); 298 return (ENODEV); 299 } 300 if (vp->v_mountedhere != NULL) { 301 vput(vp); 302 return (EBUSY); 303 } 304 305 /* 306 * Allocate and initialize the file system. 307 */ 308 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 309 M_MOUNT, M_WAITOK); 310 memset((char *)mp, 0, (u_long)sizeof(struct mount)); 311 lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0); 312 simple_lock_init(&mp->mnt_slock); 313 (void)vfs_busy(mp, LK_NOWAIT, 0); 314 mp->mnt_op = vfs; 315 vfs->vfs_refcount++; 316 mp->mnt_vnodecovered = vp; 317 mp->mnt_stat.f_owner = p->p_ucred->cr_uid; 318 mp->mnt_unmounter = NULL; 319 mp->mnt_leaf = mp; 320 321 /* 322 * The underlying file system may refuse the mount for 323 * various reasons. Allow the user to force it to happen. 324 */ 325 mp->mnt_flag |= SCARG(uap, flags) & MNT_FORCE; 326 update: 327 if ((SCARG(uap, flags) & MNT_GETARGS) == 0) { 328 /* 329 * Set the mount level flags. 330 */ 331 if (SCARG(uap, flags) & MNT_RDONLY) 332 mp->mnt_flag |= MNT_RDONLY; 333 else if (mp->mnt_flag & MNT_RDONLY) 334 mp->mnt_iflag |= IMNT_WANTRDWR; 335 mp->mnt_flag &= 336 ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 337 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 338 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP); 339 mp->mnt_flag |= SCARG(uap, flags) & 340 (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 341 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 342 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP | 343 MNT_IGNORE); 344 } 345 /* 346 * Mount the filesystem. 347 */ 348 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p); 349 if (mp->mnt_flag & (MNT_UPDATE | MNT_GETARGS)) { 350 if (mp->mnt_iflag & IMNT_WANTRDWR) 351 mp->mnt_flag &= ~MNT_RDONLY; 352 if (error) 353 mp->mnt_flag = flag; 354 mp->mnt_flag &=~ 355 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 356 mp->mnt_iflag &=~ IMNT_WANTRDWR; 357 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) { 358 if (mp->mnt_syncer == NULL) 359 error = vfs_allocate_syncvnode(mp); 360 } else { 361 if (mp->mnt_syncer != NULL) 362 vfs_deallocate_syncvnode(mp); 363 } 364 vfs_unbusy(mp); 365 VOP_UNLOCK(vp, 0); 366 vrele(vp); 367 return (error); 368 } 369 /* 370 * Put the new filesystem on the mount list after root. 371 */ 372 cache_purge(vp); 373 if (!error) { 374 mp->mnt_flag &=~ 375 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 376 mp->mnt_iflag &=~ IMNT_WANTRDWR; 377 vp->v_mountedhere = mp; 378 simple_lock(&mountlist_slock); 379 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 380 simple_unlock(&mountlist_slock); 381 checkdirs(vp); 382 VOP_UNLOCK(vp, 0); 383 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 384 error = vfs_allocate_syncvnode(mp); 385 vfs_unbusy(mp); 386 (void) VFS_STATVFS(mp, &mp->mnt_stat, p); 387 if ((error = VFS_START(mp, 0, p))) 388 vrele(vp); 389 } else { 390 vp->v_mountedhere = (struct mount *)0; 391 vfs->vfs_refcount--; 392 vfs_unbusy(mp); 393 free(mp, M_MOUNT); 394 vput(vp); 395 } 396 return (error); 397 } 398 399 /* 400 * Scan all active processes to see if any of them have a current 401 * or root directory onto which the new filesystem has just been 402 * mounted. If so, replace them with the new mount point. 403 */ 404 void 405 checkdirs(olddp) 406 struct vnode *olddp; 407 { 408 struct cwdinfo *cwdi; 409 struct vnode *newdp; 410 struct proc *p; 411 412 if (olddp->v_usecount == 1) 413 return; 414 if (VFS_ROOT(olddp->v_mountedhere, &newdp)) 415 panic("mount: lost mount"); 416 proclist_lock_read(); 417 PROCLIST_FOREACH(p, &allproc) { 418 cwdi = p->p_cwdi; 419 if (!cwdi) 420 continue; 421 if (cwdi->cwdi_cdir == olddp) { 422 vrele(cwdi->cwdi_cdir); 423 VREF(newdp); 424 cwdi->cwdi_cdir = newdp; 425 } 426 if (cwdi->cwdi_rdir == olddp) { 427 vrele(cwdi->cwdi_rdir); 428 VREF(newdp); 429 cwdi->cwdi_rdir = newdp; 430 } 431 } 432 proclist_unlock_read(); 433 if (rootvnode == olddp) { 434 vrele(rootvnode); 435 VREF(newdp); 436 rootvnode = newdp; 437 } 438 vput(newdp); 439 } 440 441 /* 442 * Unmount a file system. 443 * 444 * Note: unmount takes a path to the vnode mounted on as argument, 445 * not special file (as before). 446 */ 447 /* ARGSUSED */ 448 int 449 sys_unmount(l, v, retval) 450 struct lwp *l; 451 void *v; 452 register_t *retval; 453 { 454 struct sys_unmount_args /* { 455 syscallarg(const char *) path; 456 syscallarg(int) flags; 457 } */ *uap = v; 458 struct proc *p = l->l_proc; 459 struct vnode *vp; 460 struct mount *mp; 461 int error; 462 struct nameidata nd; 463 464 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 465 SCARG(uap, path), p); 466 if ((error = namei(&nd)) != 0) 467 return (error); 468 vp = nd.ni_vp; 469 mp = vp->v_mount; 470 471 /* 472 * Only root, or the user that did the original mount is 473 * permitted to unmount this filesystem. 474 */ 475 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) && 476 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 477 vput(vp); 478 return (error); 479 } 480 481 /* 482 * Don't allow unmounting the root file system. 483 */ 484 if (mp->mnt_flag & MNT_ROOTFS) { 485 vput(vp); 486 return (EINVAL); 487 } 488 489 /* 490 * Must be the root of the filesystem 491 */ 492 if ((vp->v_flag & VROOT) == 0) { 493 vput(vp); 494 return (EINVAL); 495 } 496 vput(vp); 497 498 /* 499 * XXX Freeze syncer. Must do this before locking the 500 * mount point. See dounmount() for details. 501 */ 502 lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL); 503 504 if (vfs_busy(mp, 0, 0)) { 505 lockmgr(&syncer_lock, LK_RELEASE, NULL); 506 return (EBUSY); 507 } 508 509 return (dounmount(mp, SCARG(uap, flags), p)); 510 } 511 512 /* 513 * Do the actual file system unmount. File system is assumed to have been 514 * marked busy by the caller. 515 */ 516 int 517 dounmount(mp, flags, p) 518 struct mount *mp; 519 int flags; 520 struct proc *p; 521 { 522 struct vnode *coveredvp; 523 int error; 524 int async; 525 int used_syncer; 526 527 simple_lock(&mountlist_slock); 528 vfs_unbusy(mp); 529 used_syncer = (mp->mnt_syncer != NULL); 530 531 /* 532 * XXX Syncer must be frozen when we get here. This should really 533 * be done on a per-mountpoint basis, but especially the softdep 534 * code possibly called from the syncer doens't exactly work on a 535 * per-mountpoint basis, so the softdep code would become a maze 536 * of vfs_busy() calls. 537 * 538 * The caller of dounmount() must acquire syncer_lock because 539 * the syncer itself acquires locks in syncer_lock -> vfs_busy 540 * order, and we must preserve that order to avoid deadlock. 541 * 542 * So, if the file system did not use the syncer, now is 543 * the time to release the syncer_lock. 544 */ 545 if (used_syncer == 0) 546 lockmgr(&syncer_lock, LK_RELEASE, NULL); 547 548 mp->mnt_iflag |= IMNT_UNMOUNT; 549 mp->mnt_unmounter = p; 550 lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock); 551 vn_start_write(NULL, &mp, V_WAIT); 552 553 if (mp->mnt_flag & MNT_EXPUBLIC) 554 vfs_setpublicfs(NULL, NULL, NULL); 555 async = mp->mnt_flag & MNT_ASYNC; 556 mp->mnt_flag &= ~MNT_ASYNC; 557 cache_purgevfs(mp); /* remove cache entries for this file sys */ 558 if (mp->mnt_syncer != NULL) 559 vfs_deallocate_syncvnode(mp); 560 error = 0; 561 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 562 #if NFSS > 0 563 error = fss_umount_hook(mp, (flags & MNT_FORCE)); 564 #endif 565 if (error == 0) 566 error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p); 567 } 568 if (error == 0 || (flags & MNT_FORCE)) 569 error = VFS_UNMOUNT(mp, flags, p); 570 vn_finished_write(mp, 0); 571 simple_lock(&mountlist_slock); 572 if (error) { 573 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 574 (void) vfs_allocate_syncvnode(mp); 575 mp->mnt_iflag &= ~IMNT_UNMOUNT; 576 mp->mnt_unmounter = NULL; 577 mp->mnt_flag |= async; 578 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE, 579 &mountlist_slock); 580 if (used_syncer) 581 lockmgr(&syncer_lock, LK_RELEASE, NULL); 582 simple_lock(&mp->mnt_slock); 583 while (mp->mnt_wcnt > 0) { 584 wakeup(mp); 585 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1", 586 0, &mp->mnt_slock); 587 } 588 simple_unlock(&mp->mnt_slock); 589 return (error); 590 } 591 CIRCLEQ_REMOVE(&mountlist, mp, mnt_list); 592 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) { 593 coveredvp->v_mountedhere = NULL; 594 vrele(coveredvp); 595 } 596 mp->mnt_op->vfs_refcount--; 597 if (LIST_FIRST(&mp->mnt_vnodelist) != NULL) 598 panic("unmount: dangling vnode"); 599 mp->mnt_iflag |= IMNT_GONE; 600 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock); 601 if (used_syncer) 602 lockmgr(&syncer_lock, LK_RELEASE, NULL); 603 simple_lock(&mp->mnt_slock); 604 while (mp->mnt_wcnt > 0) { 605 wakeup(mp); 606 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0, &mp->mnt_slock); 607 } 608 simple_unlock(&mp->mnt_slock); 609 free(mp, M_MOUNT); 610 return (0); 611 } 612 613 /* 614 * Sync each mounted filesystem. 615 */ 616 #ifdef DEBUG 617 int syncprt = 0; 618 struct ctldebug debug0 = { "syncprt", &syncprt }; 619 #endif 620 621 /* ARGSUSED */ 622 int 623 sys_sync(l, v, retval) 624 struct lwp *l; 625 void *v; 626 register_t *retval; 627 { 628 struct mount *mp, *nmp; 629 int asyncflag; 630 struct proc *p = l == NULL ? &proc0 : l->l_proc; 631 632 simple_lock(&mountlist_slock); 633 for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) { 634 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 635 nmp = mp->mnt_list.cqe_prev; 636 continue; 637 } 638 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 639 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 640 asyncflag = mp->mnt_flag & MNT_ASYNC; 641 mp->mnt_flag &= ~MNT_ASYNC; 642 VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p); 643 if (asyncflag) 644 mp->mnt_flag |= MNT_ASYNC; 645 vn_finished_write(mp, 0); 646 } 647 simple_lock(&mountlist_slock); 648 nmp = mp->mnt_list.cqe_prev; 649 vfs_unbusy(mp); 650 651 } 652 simple_unlock(&mountlist_slock); 653 #ifdef DEBUG 654 if (syncprt) 655 vfs_bufstats(); 656 #endif /* DEBUG */ 657 return (0); 658 } 659 660 /* 661 * Change filesystem quotas. 662 */ 663 /* ARGSUSED */ 664 int 665 sys_quotactl(l, v, retval) 666 struct lwp *l; 667 void *v; 668 register_t *retval; 669 { 670 struct sys_quotactl_args /* { 671 syscallarg(const char *) path; 672 syscallarg(int) cmd; 673 syscallarg(int) uid; 674 syscallarg(caddr_t) arg; 675 } */ *uap = v; 676 struct proc *p = l->l_proc; 677 struct mount *mp; 678 int error; 679 struct nameidata nd; 680 681 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 682 if ((error = namei(&nd)) != 0) 683 return (error); 684 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 685 vrele(nd.ni_vp); 686 if (error) 687 return (error); 688 error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid), 689 SCARG(uap, arg), p); 690 vn_finished_write(mp, 0); 691 return (error); 692 } 693 694 int 695 dostatvfs(struct mount *mp, struct statvfs *sp, struct proc *p, int flags, 696 int root) 697 { 698 struct cwdinfo *cwdi = p->p_cwdi; 699 int error = 0; 700 701 /* 702 * If MNT_NOWAIT or MNT_LAZY is specified, do not 703 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY 704 * overrides MNT_NOWAIT. 705 */ 706 if (flags == MNT_NOWAIT || flags == MNT_LAZY || 707 (flags != MNT_WAIT && flags != 0)) { 708 memcpy(sp, &mp->mnt_stat, sizeof(*sp)); 709 goto done; 710 } 711 712 /* Get the filesystem stats now */ 713 memset(sp, 0, sizeof(*sp)); 714 if ((error = VFS_STATVFS(mp, sp, p)) != 0) { 715 return error; 716 } 717 718 if (cwdi->cwdi_rdir == NULL) 719 (void)memcpy(&mp->mnt_stat, sp, sizeof(mp->mnt_stat)); 720 done: 721 if (cwdi->cwdi_rdir != NULL) { 722 size_t len; 723 char *bp; 724 char *path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 725 if (!path) 726 return ENOMEM; 727 728 bp = path + MAXPATHLEN; 729 *--bp = '\0'; 730 error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, path, 731 MAXPATHLEN / 2, 0, p); 732 if (error) { 733 free(path, M_TEMP); 734 return error; 735 } 736 len = strlen(bp); 737 /* 738 * for mount points that are below our root, we can see 739 * them, so we fix up the pathname and return them. The 740 * rest we cannot see, so we don't allow viewing the 741 * data. 742 */ 743 if (strncmp(bp, sp->f_mntonname, len) == 0) { 744 strlcpy(sp->f_mntonname, &sp->f_mntonname[len], 745 sizeof(sp->f_mntonname)); 746 if (sp->f_mntonname[0] == '\0') 747 (void)strlcpy(sp->f_mntonname, "/", 748 sizeof(sp->f_mntonname)); 749 } else { 750 if (root) 751 (void)strlcpy(sp->f_mntonname, "/", 752 sizeof(sp->f_mntonname)); 753 else 754 error = EPERM; 755 } 756 free(path, M_TEMP); 757 } 758 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 759 return error; 760 } 761 762 /* 763 * Get filesystem statistics. 764 */ 765 /* ARGSUSED */ 766 int 767 sys_statvfs1(l, v, retval) 768 struct lwp *l; 769 void *v; 770 register_t *retval; 771 { 772 struct sys_statvfs1_args /* { 773 syscallarg(const char *) path; 774 syscallarg(struct statvfs *) buf; 775 syscallarg(int) flags; 776 } */ *uap = v; 777 struct proc *p = l->l_proc; 778 struct mount *mp; 779 struct statvfs sbuf; 780 int error; 781 struct nameidata nd; 782 783 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 784 if ((error = namei(&nd)) != 0) 785 return error; 786 mp = nd.ni_vp->v_mount; 787 vrele(nd.ni_vp); 788 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 789 return error; 790 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 791 } 792 793 /* 794 * Get filesystem statistics. 795 */ 796 /* ARGSUSED */ 797 int 798 sys_fstatvfs1(l, v, retval) 799 struct lwp *l; 800 void *v; 801 register_t *retval; 802 { 803 struct sys_fstatvfs1_args /* { 804 syscallarg(int) fd; 805 syscallarg(struct statvfs *) buf; 806 syscallarg(int) flags; 807 } */ *uap = v; 808 struct proc *p = l->l_proc; 809 struct file *fp; 810 struct mount *mp; 811 struct statvfs sbuf; 812 int error; 813 814 /* getvnode() will use the descriptor for us */ 815 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 816 return (error); 817 mp = ((struct vnode *)fp->f_data)->v_mount; 818 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 819 goto out; 820 error = copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 821 out: 822 FILE_UNUSE(fp, p); 823 return error; 824 } 825 826 827 /* 828 * Get statistics on all filesystems. 829 */ 830 int 831 sys_getvfsstat(l, v, retval) 832 struct lwp *l; 833 void *v; 834 register_t *retval; 835 { 836 struct sys_getvfsstat_args /* { 837 syscallarg(struct statvfs *) buf; 838 syscallarg(size_t) bufsize; 839 syscallarg(int) flags; 840 } */ *uap = v; 841 int root = 0; 842 struct proc *p = l->l_proc; 843 struct mount *mp, *nmp; 844 struct statvfs sbuf; 845 struct statvfs *sfsp; 846 size_t count, maxcount; 847 int error = 0; 848 849 maxcount = SCARG(uap, bufsize) / sizeof(struct statvfs); 850 sfsp = SCARG(uap, buf); 851 simple_lock(&mountlist_slock); 852 count = 0; 853 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 854 mp = nmp) { 855 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 856 nmp = CIRCLEQ_NEXT(mp, mnt_list); 857 continue; 858 } 859 if (sfsp && count < maxcount) { 860 error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 0); 861 if (error) { 862 simple_lock(&mountlist_slock); 863 nmp = CIRCLEQ_NEXT(mp, mnt_list); 864 vfs_unbusy(mp); 865 continue; 866 } 867 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 868 if (error) { 869 vfs_unbusy(mp); 870 return (error); 871 } 872 sfsp++; 873 root |= strcmp(sbuf.f_mntonname, "/") == 0; 874 } 875 count++; 876 simple_lock(&mountlist_slock); 877 nmp = CIRCLEQ_NEXT(mp, mnt_list); 878 vfs_unbusy(mp); 879 } 880 simple_unlock(&mountlist_slock); 881 if (root == 0 && p->p_cwdi->cwdi_rdir) { 882 /* 883 * fake a root entry 884 */ 885 if ((error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, &sbuf, p, 886 SCARG(uap, flags), 1)) != 0) 887 return error; 888 if (sfsp) 889 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 890 count++; 891 } 892 if (sfsp && count > maxcount) 893 *retval = maxcount; 894 else 895 *retval = count; 896 return error; 897 } 898 899 /* 900 * Change current working directory to a given file descriptor. 901 */ 902 /* ARGSUSED */ 903 int 904 sys_fchdir(l, v, retval) 905 struct lwp *l; 906 void *v; 907 register_t *retval; 908 { 909 struct sys_fchdir_args /* { 910 syscallarg(int) fd; 911 } */ *uap = v; 912 struct proc *p = l->l_proc; 913 struct filedesc *fdp = p->p_fd; 914 struct cwdinfo *cwdi = p->p_cwdi; 915 struct vnode *vp, *tdp; 916 struct mount *mp; 917 struct file *fp; 918 int error; 919 920 /* getvnode() will use the descriptor for us */ 921 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 922 return (error); 923 vp = (struct vnode *)fp->f_data; 924 925 VREF(vp); 926 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 927 if (vp->v_type != VDIR) 928 error = ENOTDIR; 929 else 930 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 931 while (!error && (mp = vp->v_mountedhere) != NULL) { 932 if (vfs_busy(mp, 0, 0)) 933 continue; 934 error = VFS_ROOT(mp, &tdp); 935 vfs_unbusy(mp); 936 if (error) 937 break; 938 vput(vp); 939 vp = tdp; 940 } 941 if (error) { 942 vput(vp); 943 goto out; 944 } 945 VOP_UNLOCK(vp, 0); 946 947 /* 948 * Disallow changing to a directory not under the process's 949 * current root directory (if there is one). 950 */ 951 if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, p)) { 952 vrele(vp); 953 error = EPERM; /* operation not permitted */ 954 goto out; 955 } 956 957 vrele(cwdi->cwdi_cdir); 958 cwdi->cwdi_cdir = vp; 959 out: 960 FILE_UNUSE(fp, p); 961 return (error); 962 } 963 964 /* 965 * Change this process's notion of the root directory to a given file descriptor. 966 */ 967 968 int 969 sys_fchroot(l, v, retval) 970 struct lwp *l; 971 void *v; 972 register_t *retval; 973 { 974 struct sys_fchroot_args *uap = v; 975 struct proc *p = l->l_proc; 976 struct filedesc *fdp = p->p_fd; 977 struct cwdinfo *cwdi = p->p_cwdi; 978 struct vnode *vp; 979 struct file *fp; 980 int error; 981 982 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 983 return error; 984 /* getvnode() will use the descriptor for us */ 985 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 986 return error; 987 vp = (struct vnode *) fp->f_data; 988 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 989 if (vp->v_type != VDIR) 990 error = ENOTDIR; 991 else 992 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 993 VOP_UNLOCK(vp, 0); 994 if (error) 995 goto out; 996 VREF(vp); 997 998 /* 999 * Prevent escaping from chroot by putting the root under 1000 * the working directory. Silently chdir to / if we aren't 1001 * already there. 1002 */ 1003 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1004 /* 1005 * XXX would be more failsafe to change directory to a 1006 * deadfs node here instead 1007 */ 1008 vrele(cwdi->cwdi_cdir); 1009 VREF(vp); 1010 cwdi->cwdi_cdir = vp; 1011 } 1012 1013 if (cwdi->cwdi_rdir != NULL) 1014 vrele(cwdi->cwdi_rdir); 1015 cwdi->cwdi_rdir = vp; 1016 out: 1017 FILE_UNUSE(fp, p); 1018 return (error); 1019 } 1020 1021 1022 1023 /* 1024 * Change current working directory (``.''). 1025 */ 1026 /* ARGSUSED */ 1027 int 1028 sys_chdir(l, v, retval) 1029 struct lwp *l; 1030 void *v; 1031 register_t *retval; 1032 { 1033 struct sys_chdir_args /* { 1034 syscallarg(const char *) path; 1035 } */ *uap = v; 1036 struct proc *p = l->l_proc; 1037 struct cwdinfo *cwdi = p->p_cwdi; 1038 int error; 1039 struct nameidata nd; 1040 1041 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1042 SCARG(uap, path), p); 1043 if ((error = change_dir(&nd, p)) != 0) 1044 return (error); 1045 vrele(cwdi->cwdi_cdir); 1046 cwdi->cwdi_cdir = nd.ni_vp; 1047 return (0); 1048 } 1049 1050 /* 1051 * Change notion of root (``/'') directory. 1052 */ 1053 /* ARGSUSED */ 1054 int 1055 sys_chroot(l, v, retval) 1056 struct lwp *l; 1057 void *v; 1058 register_t *retval; 1059 { 1060 struct sys_chroot_args /* { 1061 syscallarg(const char *) path; 1062 } */ *uap = v; 1063 struct proc *p = l->l_proc; 1064 struct cwdinfo *cwdi = p->p_cwdi; 1065 struct vnode *vp; 1066 int error; 1067 struct nameidata nd; 1068 1069 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1070 return (error); 1071 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1072 SCARG(uap, path), p); 1073 if ((error = change_dir(&nd, p)) != 0) 1074 return (error); 1075 if (cwdi->cwdi_rdir != NULL) 1076 vrele(cwdi->cwdi_rdir); 1077 vp = nd.ni_vp; 1078 cwdi->cwdi_rdir = vp; 1079 1080 /* 1081 * Prevent escaping from chroot by putting the root under 1082 * the working directory. Silently chdir to / if we aren't 1083 * already there. 1084 */ 1085 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1086 /* 1087 * XXX would be more failsafe to change directory to a 1088 * deadfs node here instead 1089 */ 1090 vrele(cwdi->cwdi_cdir); 1091 VREF(vp); 1092 cwdi->cwdi_cdir = vp; 1093 } 1094 1095 return (0); 1096 } 1097 1098 /* 1099 * Common routine for chroot and chdir. 1100 */ 1101 static int 1102 change_dir(ndp, p) 1103 struct nameidata *ndp; 1104 struct proc *p; 1105 { 1106 struct vnode *vp; 1107 int error; 1108 1109 if ((error = namei(ndp)) != 0) 1110 return (error); 1111 vp = ndp->ni_vp; 1112 if (vp->v_type != VDIR) 1113 error = ENOTDIR; 1114 else 1115 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 1116 1117 if (error) 1118 vput(vp); 1119 else 1120 VOP_UNLOCK(vp, 0); 1121 return (error); 1122 } 1123 1124 /* 1125 * Check permissions, allocate an open file structure, 1126 * and call the device open routine if any. 1127 */ 1128 int 1129 sys_open(l, v, retval) 1130 struct lwp *l; 1131 void *v; 1132 register_t *retval; 1133 { 1134 struct sys_open_args /* { 1135 syscallarg(const char *) path; 1136 syscallarg(int) flags; 1137 syscallarg(int) mode; 1138 } */ *uap = v; 1139 struct proc *p = l->l_proc; 1140 struct cwdinfo *cwdi = p->p_cwdi; 1141 struct filedesc *fdp = p->p_fd; 1142 struct file *fp; 1143 struct vnode *vp; 1144 int flags, cmode; 1145 int type, indx, error; 1146 struct flock lf; 1147 struct nameidata nd; 1148 1149 flags = FFLAGS(SCARG(uap, flags)); 1150 if ((flags & (FREAD | FWRITE)) == 0) 1151 return (EINVAL); 1152 /* falloc() will use the file descriptor for us */ 1153 if ((error = falloc(p, &fp, &indx)) != 0) 1154 return (error); 1155 cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT; 1156 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1157 l->l_dupfd = -indx - 1; /* XXX check for fdopen */ 1158 if ((error = vn_open(&nd, flags, cmode)) != 0) { 1159 FILE_UNUSE(fp, p); 1160 fdp->fd_ofiles[indx] = NULL; 1161 ffree(fp); 1162 if ((error == EDUPFD || error == EMOVEFD) && 1163 l->l_dupfd >= 0 && /* XXX from fdopen */ 1164 (error = 1165 dupfdopen(p, indx, l->l_dupfd, flags, error)) == 0) { 1166 *retval = indx; 1167 return (0); 1168 } 1169 if (error == ERESTART) 1170 error = EINTR; 1171 fdremove(fdp, indx); 1172 return (error); 1173 } 1174 l->l_dupfd = 0; 1175 vp = nd.ni_vp; 1176 fp->f_flag = flags & FMASK; 1177 fp->f_type = DTYPE_VNODE; 1178 fp->f_ops = &vnops; 1179 fp->f_data = vp; 1180 if (flags & (O_EXLOCK | O_SHLOCK)) { 1181 lf.l_whence = SEEK_SET; 1182 lf.l_start = 0; 1183 lf.l_len = 0; 1184 if (flags & O_EXLOCK) 1185 lf.l_type = F_WRLCK; 1186 else 1187 lf.l_type = F_RDLCK; 1188 type = F_FLOCK; 1189 if ((flags & FNONBLOCK) == 0) 1190 type |= F_WAIT; 1191 VOP_UNLOCK(vp, 0); 1192 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1193 if (error) { 1194 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1195 FILE_UNUSE(fp, p); 1196 ffree(fp); 1197 fdremove(fdp, indx); 1198 return (error); 1199 } 1200 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1201 fp->f_flag |= FHASLOCK; 1202 } 1203 VOP_UNLOCK(vp, 0); 1204 *retval = indx; 1205 FILE_SET_MATURE(fp); 1206 FILE_UNUSE(fp, p); 1207 return (0); 1208 } 1209 1210 /* 1211 * Get file handle system call 1212 */ 1213 int 1214 sys_getfh(l, v, retval) 1215 struct lwp *l; 1216 void *v; 1217 register_t *retval; 1218 { 1219 struct sys_getfh_args /* { 1220 syscallarg(char *) fname; 1221 syscallarg(fhandle_t *) fhp; 1222 } */ *uap = v; 1223 struct proc *p = l->l_proc; 1224 struct vnode *vp; 1225 fhandle_t fh; 1226 int error; 1227 struct nameidata nd; 1228 1229 /* 1230 * Must be super user 1231 */ 1232 error = suser(p->p_ucred, &p->p_acflag); 1233 if (error) 1234 return (error); 1235 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1236 SCARG(uap, fname), p); 1237 error = namei(&nd); 1238 if (error) 1239 return (error); 1240 vp = nd.ni_vp; 1241 memset(&fh, 0, sizeof(fh)); 1242 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1243 error = VFS_VPTOFH(vp, &fh.fh_fid); 1244 vput(vp); 1245 if (error) 1246 return (error); 1247 error = copyout(&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); 1248 return (error); 1249 } 1250 1251 /* 1252 * Open a file given a file handle. 1253 * 1254 * Check permissions, allocate an open file structure, 1255 * and call the device open routine if any. 1256 */ 1257 int 1258 sys_fhopen(l, v, retval) 1259 struct lwp *l; 1260 void *v; 1261 register_t *retval; 1262 { 1263 struct sys_fhopen_args /* { 1264 syscallarg(const fhandle_t *) fhp; 1265 syscallarg(int) flags; 1266 } */ *uap = v; 1267 struct proc *p = l->l_proc; 1268 struct filedesc *fdp = p->p_fd; 1269 struct file *fp; 1270 struct vnode *vp = NULL; 1271 struct mount *mp; 1272 struct ucred *cred = p->p_ucred; 1273 int flags; 1274 struct file *nfp; 1275 int type, indx, error=0; 1276 struct flock lf; 1277 struct vattr va; 1278 fhandle_t fh; 1279 1280 /* 1281 * Must be super user 1282 */ 1283 if ((error = suser(p->p_ucred, &p->p_acflag))) 1284 return (error); 1285 1286 flags = FFLAGS(SCARG(uap, flags)); 1287 if ((flags & (FREAD | FWRITE)) == 0) 1288 return (EINVAL); 1289 if ((flags & O_CREAT)) 1290 return (EINVAL); 1291 /* falloc() will use the file descriptor for us */ 1292 if ((error = falloc(p, &nfp, &indx)) != 0) 1293 return (error); 1294 fp = nfp; 1295 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1296 goto bad; 1297 1298 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) { 1299 error = ESTALE; 1300 goto bad; 1301 } 1302 1303 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) { 1304 vp = NULL; /* most likely unnecessary sanity for bad: */ 1305 goto bad; 1306 } 1307 1308 /* Now do an effective vn_open */ 1309 1310 if (vp->v_type == VSOCK) { 1311 error = EOPNOTSUPP; 1312 goto bad; 1313 } 1314 if (flags & FREAD) { 1315 if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0) 1316 goto bad; 1317 } 1318 if (flags & (FWRITE | O_TRUNC)) { 1319 if (vp->v_type == VDIR) { 1320 error = EISDIR; 1321 goto bad; 1322 } 1323 if ((error = vn_writechk(vp)) != 0 || 1324 (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0) 1325 goto bad; 1326 } 1327 if (flags & O_TRUNC) { 1328 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 1329 goto bad; 1330 VOP_UNLOCK(vp, 0); /* XXX */ 1331 VOP_LEASE(vp, p, cred, LEASE_WRITE); 1332 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */ 1333 VATTR_NULL(&va); 1334 va.va_size = 0; 1335 error = VOP_SETATTR(vp, &va, cred, p); 1336 vn_finished_write(mp, 0); 1337 if (error) 1338 goto bad; 1339 } 1340 if ((error = VOP_OPEN(vp, flags, cred, p)) != 0) 1341 goto bad; 1342 if (vp->v_type == VREG && 1343 uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) { 1344 error = EIO; 1345 goto bad; 1346 } 1347 if (flags & FWRITE) 1348 vp->v_writecount++; 1349 1350 /* done with modified vn_open, now finish what sys_open does. */ 1351 1352 fp->f_flag = flags & FMASK; 1353 fp->f_type = DTYPE_VNODE; 1354 fp->f_ops = &vnops; 1355 fp->f_data = vp; 1356 if (flags & (O_EXLOCK | O_SHLOCK)) { 1357 lf.l_whence = SEEK_SET; 1358 lf.l_start = 0; 1359 lf.l_len = 0; 1360 if (flags & O_EXLOCK) 1361 lf.l_type = F_WRLCK; 1362 else 1363 lf.l_type = F_RDLCK; 1364 type = F_FLOCK; 1365 if ((flags & FNONBLOCK) == 0) 1366 type |= F_WAIT; 1367 VOP_UNLOCK(vp, 0); 1368 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1369 if (error) { 1370 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1371 FILE_UNUSE(fp, p); 1372 ffree(fp); 1373 fdremove(fdp, indx); 1374 return (error); 1375 } 1376 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1377 fp->f_flag |= FHASLOCK; 1378 } 1379 VOP_UNLOCK(vp, 0); 1380 *retval = indx; 1381 FILE_SET_MATURE(fp); 1382 FILE_UNUSE(fp, p); 1383 return (0); 1384 1385 bad: 1386 FILE_UNUSE(fp, p); 1387 ffree(fp); 1388 fdremove(fdp, indx); 1389 if (vp != NULL) 1390 vput(vp); 1391 return (error); 1392 } 1393 1394 /* ARGSUSED */ 1395 int 1396 sys_fhstat(l, v, retval) 1397 struct lwp *l; 1398 void *v; 1399 register_t *retval; 1400 { 1401 struct sys_fhstat_args /* { 1402 syscallarg(const fhandle_t *) fhp; 1403 syscallarg(struct stat *) sb; 1404 } */ *uap = v; 1405 struct proc *p = l->l_proc; 1406 struct stat sb; 1407 int error; 1408 fhandle_t fh; 1409 struct mount *mp; 1410 struct vnode *vp; 1411 1412 /* 1413 * Must be super user 1414 */ 1415 if ((error = suser(p->p_ucred, &p->p_acflag))) 1416 return (error); 1417 1418 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1419 return (error); 1420 1421 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1422 return (ESTALE); 1423 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1424 return (error); 1425 error = vn_stat(vp, &sb, p); 1426 vput(vp); 1427 if (error) 1428 return (error); 1429 error = copyout(&sb, SCARG(uap, sb), sizeof(sb)); 1430 return (error); 1431 } 1432 1433 /* ARGSUSED */ 1434 int 1435 sys_fhstatvfs1(l, v, retval) 1436 struct lwp *l; 1437 void *v; 1438 register_t *retval; 1439 { 1440 struct sys_fhstatvfs1_args /* 1441 syscallarg(const fhandle_t *) fhp; 1442 syscallarg(struct statvfs *) buf; 1443 syscallarg(int) flags; 1444 } */ *uap = v; 1445 struct proc *p = l->l_proc; 1446 struct statvfs sbuf; 1447 fhandle_t fh; 1448 struct mount *mp; 1449 struct vnode *vp; 1450 int error; 1451 1452 /* 1453 * Must be super user 1454 */ 1455 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1456 return error; 1457 1458 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1459 return error; 1460 1461 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1462 return ESTALE; 1463 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1464 return error; 1465 1466 mp = vp->v_mount; 1467 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) { 1468 vput(vp); 1469 return error; 1470 } 1471 vput(vp); 1472 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 1473 } 1474 1475 /* 1476 * Create a special file. 1477 */ 1478 /* ARGSUSED */ 1479 int 1480 sys_mknod(l, v, retval) 1481 struct lwp *l; 1482 void *v; 1483 register_t *retval; 1484 { 1485 struct sys_mknod_args /* { 1486 syscallarg(const char *) path; 1487 syscallarg(int) mode; 1488 syscallarg(int) dev; 1489 } */ *uap = v; 1490 struct proc *p = l->l_proc; 1491 struct vnode *vp; 1492 struct mount *mp; 1493 struct vattr vattr; 1494 int error; 1495 int whiteout = 0; 1496 struct nameidata nd; 1497 1498 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1499 return (error); 1500 restart: 1501 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1502 if ((error = namei(&nd)) != 0) 1503 return (error); 1504 vp = nd.ni_vp; 1505 if (vp != NULL) 1506 error = EEXIST; 1507 else { 1508 VATTR_NULL(&vattr); 1509 vattr.va_mode = 1510 (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1511 vattr.va_rdev = SCARG(uap, dev); 1512 whiteout = 0; 1513 1514 switch (SCARG(uap, mode) & S_IFMT) { 1515 case S_IFMT: /* used by badsect to flag bad sectors */ 1516 vattr.va_type = VBAD; 1517 break; 1518 case S_IFCHR: 1519 vattr.va_type = VCHR; 1520 break; 1521 case S_IFBLK: 1522 vattr.va_type = VBLK; 1523 break; 1524 case S_IFWHT: 1525 whiteout = 1; 1526 break; 1527 default: 1528 error = EINVAL; 1529 break; 1530 } 1531 } 1532 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1533 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1534 if (nd.ni_dvp == vp) 1535 vrele(nd.ni_dvp); 1536 else 1537 vput(nd.ni_dvp); 1538 if (vp) 1539 vrele(vp); 1540 if ((error = vn_start_write(NULL, &mp, 1541 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1542 return (error); 1543 goto restart; 1544 } 1545 if (!error) { 1546 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1547 if (whiteout) { 1548 error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); 1549 if (error) 1550 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1551 vput(nd.ni_dvp); 1552 } else { 1553 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, 1554 &nd.ni_cnd, &vattr); 1555 if (error == 0) 1556 vput(nd.ni_vp); 1557 } 1558 } else { 1559 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1560 if (nd.ni_dvp == vp) 1561 vrele(nd.ni_dvp); 1562 else 1563 vput(nd.ni_dvp); 1564 if (vp) 1565 vrele(vp); 1566 } 1567 vn_finished_write(mp, 0); 1568 return (error); 1569 } 1570 1571 /* 1572 * Create a named pipe. 1573 */ 1574 /* ARGSUSED */ 1575 int 1576 sys_mkfifo(l, v, retval) 1577 struct lwp *l; 1578 void *v; 1579 register_t *retval; 1580 { 1581 struct sys_mkfifo_args /* { 1582 syscallarg(const char *) path; 1583 syscallarg(int) mode; 1584 } */ *uap = v; 1585 struct proc *p = l->l_proc; 1586 struct mount *mp; 1587 struct vattr vattr; 1588 int error; 1589 struct nameidata nd; 1590 1591 restart: 1592 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1593 if ((error = namei(&nd)) != 0) 1594 return (error); 1595 if (nd.ni_vp != NULL) { 1596 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1597 if (nd.ni_dvp == nd.ni_vp) 1598 vrele(nd.ni_dvp); 1599 else 1600 vput(nd.ni_dvp); 1601 vrele(nd.ni_vp); 1602 return (EEXIST); 1603 } 1604 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1605 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1606 if (nd.ni_dvp == nd.ni_vp) 1607 vrele(nd.ni_dvp); 1608 else 1609 vput(nd.ni_dvp); 1610 if (nd.ni_vp) 1611 vrele(nd.ni_vp); 1612 if ((error = vn_start_write(NULL, &mp, 1613 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1614 return (error); 1615 goto restart; 1616 } 1617 VATTR_NULL(&vattr); 1618 vattr.va_type = VFIFO; 1619 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1620 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1621 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 1622 if (error == 0) 1623 vput(nd.ni_vp); 1624 vn_finished_write(mp, 0); 1625 return (error); 1626 } 1627 1628 /* 1629 * Make a hard file link. 1630 */ 1631 /* ARGSUSED */ 1632 int 1633 sys_link(l, v, retval) 1634 struct lwp *l; 1635 void *v; 1636 register_t *retval; 1637 { 1638 struct sys_link_args /* { 1639 syscallarg(const char *) path; 1640 syscallarg(const char *) link; 1641 } */ *uap = v; 1642 struct proc *p = l->l_proc; 1643 struct vnode *vp; 1644 struct mount *mp; 1645 struct nameidata nd; 1646 int error; 1647 1648 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1649 if ((error = namei(&nd)) != 0) 1650 return (error); 1651 vp = nd.ni_vp; 1652 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 1653 vrele(vp); 1654 return (error); 1655 } 1656 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1657 if ((error = namei(&nd)) != 0) 1658 goto out; 1659 if (nd.ni_vp) { 1660 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1661 if (nd.ni_dvp == nd.ni_vp) 1662 vrele(nd.ni_dvp); 1663 else 1664 vput(nd.ni_dvp); 1665 vrele(nd.ni_vp); 1666 error = EEXIST; 1667 goto out; 1668 } 1669 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1670 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1671 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 1672 out: 1673 vrele(vp); 1674 vn_finished_write(mp, 0); 1675 return (error); 1676 } 1677 1678 /* 1679 * Make a symbolic link. 1680 */ 1681 /* ARGSUSED */ 1682 int 1683 sys_symlink(l, v, retval) 1684 struct lwp *l; 1685 void *v; 1686 register_t *retval; 1687 { 1688 struct sys_symlink_args /* { 1689 syscallarg(const char *) path; 1690 syscallarg(const char *) link; 1691 } */ *uap = v; 1692 struct proc *p = l->l_proc; 1693 struct mount *mp; 1694 struct vattr vattr; 1695 char *path; 1696 int error; 1697 struct nameidata nd; 1698 1699 path = PNBUF_GET(); 1700 error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL); 1701 if (error) 1702 goto out; 1703 restart: 1704 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1705 if ((error = namei(&nd)) != 0) 1706 goto out; 1707 if (nd.ni_vp) { 1708 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1709 if (nd.ni_dvp == nd.ni_vp) 1710 vrele(nd.ni_dvp); 1711 else 1712 vput(nd.ni_dvp); 1713 vrele(nd.ni_vp); 1714 error = EEXIST; 1715 goto out; 1716 } 1717 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1718 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1719 if (nd.ni_dvp == nd.ni_vp) 1720 vrele(nd.ni_dvp); 1721 else 1722 vput(nd.ni_dvp); 1723 if ((error = vn_start_write(NULL, &mp, 1724 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1725 return (error); 1726 goto restart; 1727 } 1728 VATTR_NULL(&vattr); 1729 vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask; 1730 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1731 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); 1732 if (error == 0) 1733 vput(nd.ni_vp); 1734 vn_finished_write(mp, 0); 1735 out: 1736 PNBUF_PUT(path); 1737 return (error); 1738 } 1739 1740 /* 1741 * Delete a whiteout from the filesystem. 1742 */ 1743 /* ARGSUSED */ 1744 int 1745 sys_undelete(l, v, retval) 1746 struct lwp *l; 1747 void *v; 1748 register_t *retval; 1749 { 1750 struct sys_undelete_args /* { 1751 syscallarg(const char *) path; 1752 } */ *uap = v; 1753 struct proc *p = l->l_proc; 1754 int error; 1755 struct mount *mp; 1756 struct nameidata nd; 1757 1758 restart: 1759 NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE, 1760 SCARG(uap, path), p); 1761 error = namei(&nd); 1762 if (error) 1763 return (error); 1764 1765 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { 1766 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1767 if (nd.ni_dvp == nd.ni_vp) 1768 vrele(nd.ni_dvp); 1769 else 1770 vput(nd.ni_dvp); 1771 if (nd.ni_vp) 1772 vrele(nd.ni_vp); 1773 return (EEXIST); 1774 } 1775 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1776 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1777 if (nd.ni_dvp == nd.ni_vp) 1778 vrele(nd.ni_dvp); 1779 else 1780 vput(nd.ni_dvp); 1781 if ((error = vn_start_write(NULL, &mp, 1782 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1783 return (error); 1784 goto restart; 1785 } 1786 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1787 if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0) 1788 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1789 vput(nd.ni_dvp); 1790 vn_finished_write(mp, 0); 1791 return (error); 1792 } 1793 1794 /* 1795 * Delete a name from the filesystem. 1796 */ 1797 /* ARGSUSED */ 1798 int 1799 sys_unlink(l, v, retval) 1800 struct lwp *l; 1801 void *v; 1802 register_t *retval; 1803 { 1804 struct sys_unlink_args /* { 1805 syscallarg(const char *) path; 1806 } */ *uap = v; 1807 struct proc *p = l->l_proc; 1808 struct mount *mp; 1809 struct vnode *vp; 1810 int error; 1811 struct nameidata nd; 1812 1813 restart: 1814 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 1815 SCARG(uap, path), p); 1816 if ((error = namei(&nd)) != 0) 1817 return (error); 1818 vp = nd.ni_vp; 1819 1820 /* 1821 * The root of a mounted filesystem cannot be deleted. 1822 */ 1823 if (vp->v_flag & VROOT) { 1824 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1825 if (nd.ni_dvp == vp) 1826 vrele(nd.ni_dvp); 1827 else 1828 vput(nd.ni_dvp); 1829 vput(vp); 1830 error = EBUSY; 1831 goto out; 1832 } 1833 1834 #ifdef VERIFIED_EXEC 1835 /* Handle remove requests for veriexec entries. */ 1836 if ((error = veriexec_removechk(p, vp, nd.ni_dirp)) != 0) { 1837 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1838 if (nd.ni_dvp == vp) 1839 vrele(nd.ni_dvp); 1840 else 1841 vput(nd.ni_dvp); 1842 vput(vp); 1843 goto out; 1844 } 1845 #endif /* VERIFIED_EXEC */ 1846 1847 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1848 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1849 if (nd.ni_dvp == vp) 1850 vrele(nd.ni_dvp); 1851 else 1852 vput(nd.ni_dvp); 1853 vput(vp); 1854 if ((error = vn_start_write(NULL, &mp, 1855 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1856 return (error); 1857 goto restart; 1858 } 1859 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1860 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1861 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1862 vn_finished_write(mp, 0); 1863 out: 1864 return (error); 1865 } 1866 1867 /* 1868 * Reposition read/write file offset. 1869 */ 1870 int 1871 sys_lseek(l, v, retval) 1872 struct lwp *l; 1873 void *v; 1874 register_t *retval; 1875 { 1876 struct sys_lseek_args /* { 1877 syscallarg(int) fd; 1878 syscallarg(int) pad; 1879 syscallarg(off_t) offset; 1880 syscallarg(int) whence; 1881 } */ *uap = v; 1882 struct proc *p = l->l_proc; 1883 struct ucred *cred = p->p_ucred; 1884 struct filedesc *fdp = p->p_fd; 1885 struct file *fp; 1886 struct vnode *vp; 1887 struct vattr vattr; 1888 off_t newoff; 1889 int error; 1890 1891 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1892 return (EBADF); 1893 1894 FILE_USE(fp); 1895 1896 vp = (struct vnode *)fp->f_data; 1897 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1898 error = ESPIPE; 1899 goto out; 1900 } 1901 1902 switch (SCARG(uap, whence)) { 1903 case SEEK_CUR: 1904 newoff = fp->f_offset + SCARG(uap, offset); 1905 break; 1906 case SEEK_END: 1907 error = VOP_GETATTR(vp, &vattr, cred, p); 1908 if (error) 1909 goto out; 1910 newoff = SCARG(uap, offset) + vattr.va_size; 1911 break; 1912 case SEEK_SET: 1913 newoff = SCARG(uap, offset); 1914 break; 1915 default: 1916 error = EINVAL; 1917 goto out; 1918 } 1919 if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0) 1920 goto out; 1921 1922 *(off_t *)retval = fp->f_offset = newoff; 1923 out: 1924 FILE_UNUSE(fp, p); 1925 return (error); 1926 } 1927 1928 /* 1929 * Positional read system call. 1930 */ 1931 int 1932 sys_pread(l, v, retval) 1933 struct lwp *l; 1934 void *v; 1935 register_t *retval; 1936 { 1937 struct sys_pread_args /* { 1938 syscallarg(int) fd; 1939 syscallarg(void *) buf; 1940 syscallarg(size_t) nbyte; 1941 syscallarg(off_t) offset; 1942 } */ *uap = v; 1943 struct proc *p = l->l_proc; 1944 struct filedesc *fdp = p->p_fd; 1945 struct file *fp; 1946 struct vnode *vp; 1947 off_t offset; 1948 int error, fd = SCARG(uap, fd); 1949 1950 if ((fp = fd_getfile(fdp, fd)) == NULL) 1951 return (EBADF); 1952 1953 if ((fp->f_flag & FREAD) == 0) { 1954 simple_unlock(&fp->f_slock); 1955 return (EBADF); 1956 } 1957 1958 FILE_USE(fp); 1959 1960 vp = (struct vnode *)fp->f_data; 1961 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1962 error = ESPIPE; 1963 goto out; 1964 } 1965 1966 offset = SCARG(uap, offset); 1967 1968 /* 1969 * XXX This works because no file systems actually 1970 * XXX take any action on the seek operation. 1971 */ 1972 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1973 goto out; 1974 1975 /* dofileread() will unuse the descriptor for us */ 1976 return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 1977 &offset, 0, retval)); 1978 1979 out: 1980 FILE_UNUSE(fp, p); 1981 return (error); 1982 } 1983 1984 /* 1985 * Positional scatter read system call. 1986 */ 1987 int 1988 sys_preadv(l, v, retval) 1989 struct lwp *l; 1990 void *v; 1991 register_t *retval; 1992 { 1993 struct sys_preadv_args /* { 1994 syscallarg(int) fd; 1995 syscallarg(const struct iovec *) iovp; 1996 syscallarg(int) iovcnt; 1997 syscallarg(off_t) offset; 1998 } */ *uap = v; 1999 struct proc *p = l->l_proc; 2000 struct filedesc *fdp = p->p_fd; 2001 struct file *fp; 2002 struct vnode *vp; 2003 off_t offset; 2004 int error, fd = SCARG(uap, fd); 2005 2006 if ((fp = fd_getfile(fdp, fd)) == NULL) 2007 return (EBADF); 2008 2009 if ((fp->f_flag & FREAD) == 0) { 2010 simple_unlock(&fp->f_slock); 2011 return (EBADF); 2012 } 2013 2014 FILE_USE(fp); 2015 2016 vp = (struct vnode *)fp->f_data; 2017 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2018 error = ESPIPE; 2019 goto out; 2020 } 2021 2022 offset = SCARG(uap, offset); 2023 2024 /* 2025 * XXX This works because no file systems actually 2026 * XXX take any action on the seek operation. 2027 */ 2028 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2029 goto out; 2030 2031 /* dofilereadv() will unuse the descriptor for us */ 2032 return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2033 &offset, 0, retval)); 2034 2035 out: 2036 FILE_UNUSE(fp, p); 2037 return (error); 2038 } 2039 2040 /* 2041 * Positional write system call. 2042 */ 2043 int 2044 sys_pwrite(l, v, retval) 2045 struct lwp *l; 2046 void *v; 2047 register_t *retval; 2048 { 2049 struct sys_pwrite_args /* { 2050 syscallarg(int) fd; 2051 syscallarg(const void *) buf; 2052 syscallarg(size_t) nbyte; 2053 syscallarg(off_t) offset; 2054 } */ *uap = v; 2055 struct proc *p = l->l_proc; 2056 struct filedesc *fdp = p->p_fd; 2057 struct file *fp; 2058 struct vnode *vp; 2059 off_t offset; 2060 int error, fd = SCARG(uap, fd); 2061 2062 if ((fp = fd_getfile(fdp, fd)) == NULL) 2063 return (EBADF); 2064 2065 if ((fp->f_flag & FWRITE) == 0) { 2066 simple_unlock(&fp->f_slock); 2067 return (EBADF); 2068 } 2069 2070 FILE_USE(fp); 2071 2072 vp = (struct vnode *)fp->f_data; 2073 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2074 error = ESPIPE; 2075 goto out; 2076 } 2077 2078 offset = SCARG(uap, offset); 2079 2080 /* 2081 * XXX This works because no file systems actually 2082 * XXX take any action on the seek operation. 2083 */ 2084 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2085 goto out; 2086 2087 /* dofilewrite() will unuse the descriptor for us */ 2088 return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 2089 &offset, 0, retval)); 2090 2091 out: 2092 FILE_UNUSE(fp, p); 2093 return (error); 2094 } 2095 2096 /* 2097 * Positional gather write system call. 2098 */ 2099 int 2100 sys_pwritev(l, v, retval) 2101 struct lwp *l; 2102 void *v; 2103 register_t *retval; 2104 { 2105 struct sys_pwritev_args /* { 2106 syscallarg(int) fd; 2107 syscallarg(const struct iovec *) iovp; 2108 syscallarg(int) iovcnt; 2109 syscallarg(off_t) offset; 2110 } */ *uap = v; 2111 struct proc *p = l->l_proc; 2112 struct filedesc *fdp = p->p_fd; 2113 struct file *fp; 2114 struct vnode *vp; 2115 off_t offset; 2116 int error, fd = SCARG(uap, fd); 2117 2118 if ((fp = fd_getfile(fdp, fd)) == NULL) 2119 return (EBADF); 2120 2121 if ((fp->f_flag & FWRITE) == 0) { 2122 simple_unlock(&fp->f_slock); 2123 return (EBADF); 2124 } 2125 2126 FILE_USE(fp); 2127 2128 vp = (struct vnode *)fp->f_data; 2129 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2130 error = ESPIPE; 2131 goto out; 2132 } 2133 2134 offset = SCARG(uap, offset); 2135 2136 /* 2137 * XXX This works because no file systems actually 2138 * XXX take any action on the seek operation. 2139 */ 2140 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2141 goto out; 2142 2143 /* dofilewritev() will unuse the descriptor for us */ 2144 return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2145 &offset, 0, retval)); 2146 2147 out: 2148 FILE_UNUSE(fp, p); 2149 return (error); 2150 } 2151 2152 /* 2153 * Check access permissions. 2154 */ 2155 int 2156 sys_access(l, v, retval) 2157 struct lwp *l; 2158 void *v; 2159 register_t *retval; 2160 { 2161 struct sys_access_args /* { 2162 syscallarg(const char *) path; 2163 syscallarg(int) flags; 2164 } */ *uap = v; 2165 struct proc *p = l->l_proc; 2166 struct ucred *cred; 2167 struct vnode *vp; 2168 int error, flags; 2169 struct nameidata nd; 2170 2171 cred = crdup(p->p_ucred); 2172 cred->cr_uid = p->p_cred->p_ruid; 2173 cred->cr_gid = p->p_cred->p_rgid; 2174 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2175 SCARG(uap, path), p); 2176 /* Override default credentials */ 2177 nd.ni_cnd.cn_cred = cred; 2178 if ((error = namei(&nd)) != 0) 2179 goto out; 2180 vp = nd.ni_vp; 2181 2182 /* Flags == 0 means only check for existence. */ 2183 if (SCARG(uap, flags)) { 2184 flags = 0; 2185 if (SCARG(uap, flags) & R_OK) 2186 flags |= VREAD; 2187 if (SCARG(uap, flags) & W_OK) 2188 flags |= VWRITE; 2189 if (SCARG(uap, flags) & X_OK) 2190 flags |= VEXEC; 2191 2192 error = VOP_ACCESS(vp, flags, cred, p); 2193 if (!error && (flags & VWRITE)) 2194 error = vn_writechk(vp); 2195 } 2196 vput(vp); 2197 out: 2198 crfree(cred); 2199 return (error); 2200 } 2201 2202 /* 2203 * Get file status; this version follows links. 2204 */ 2205 /* ARGSUSED */ 2206 int 2207 sys___stat13(l, v, retval) 2208 struct lwp *l; 2209 void *v; 2210 register_t *retval; 2211 { 2212 struct sys___stat13_args /* { 2213 syscallarg(const char *) path; 2214 syscallarg(struct stat *) ub; 2215 } */ *uap = v; 2216 struct proc *p = l->l_proc; 2217 struct stat sb; 2218 int error; 2219 struct nameidata nd; 2220 2221 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2222 SCARG(uap, path), p); 2223 if ((error = namei(&nd)) != 0) 2224 return (error); 2225 error = vn_stat(nd.ni_vp, &sb, p); 2226 vput(nd.ni_vp); 2227 if (error) 2228 return (error); 2229 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2230 return (error); 2231 } 2232 2233 /* 2234 * Get file status; this version does not follow links. 2235 */ 2236 /* ARGSUSED */ 2237 int 2238 sys___lstat13(l, v, retval) 2239 struct lwp *l; 2240 void *v; 2241 register_t *retval; 2242 { 2243 struct sys___lstat13_args /* { 2244 syscallarg(const char *) path; 2245 syscallarg(struct stat *) ub; 2246 } */ *uap = v; 2247 struct proc *p = l->l_proc; 2248 struct stat sb; 2249 int error; 2250 struct nameidata nd; 2251 2252 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2253 SCARG(uap, path), p); 2254 if ((error = namei(&nd)) != 0) 2255 return (error); 2256 error = vn_stat(nd.ni_vp, &sb, p); 2257 vput(nd.ni_vp); 2258 if (error) 2259 return (error); 2260 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2261 return (error); 2262 } 2263 2264 /* 2265 * Get configurable pathname variables. 2266 */ 2267 /* ARGSUSED */ 2268 int 2269 sys_pathconf(l, v, retval) 2270 struct lwp *l; 2271 void *v; 2272 register_t *retval; 2273 { 2274 struct sys_pathconf_args /* { 2275 syscallarg(const char *) path; 2276 syscallarg(int) name; 2277 } */ *uap = v; 2278 struct proc *p = l->l_proc; 2279 int error; 2280 struct nameidata nd; 2281 2282 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2283 SCARG(uap, path), p); 2284 if ((error = namei(&nd)) != 0) 2285 return (error); 2286 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval); 2287 vput(nd.ni_vp); 2288 return (error); 2289 } 2290 2291 /* 2292 * Return target name of a symbolic link. 2293 */ 2294 /* ARGSUSED */ 2295 int 2296 sys_readlink(l, v, retval) 2297 struct lwp *l; 2298 void *v; 2299 register_t *retval; 2300 { 2301 struct sys_readlink_args /* { 2302 syscallarg(const char *) path; 2303 syscallarg(char *) buf; 2304 syscallarg(size_t) count; 2305 } */ *uap = v; 2306 struct proc *p = l->l_proc; 2307 struct vnode *vp; 2308 struct iovec aiov; 2309 struct uio auio; 2310 int error; 2311 struct nameidata nd; 2312 2313 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2314 SCARG(uap, path), p); 2315 if ((error = namei(&nd)) != 0) 2316 return (error); 2317 vp = nd.ni_vp; 2318 if (vp->v_type != VLNK) 2319 error = EINVAL; 2320 else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) || 2321 (error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) == 0) { 2322 aiov.iov_base = SCARG(uap, buf); 2323 aiov.iov_len = SCARG(uap, count); 2324 auio.uio_iov = &aiov; 2325 auio.uio_iovcnt = 1; 2326 auio.uio_offset = 0; 2327 auio.uio_rw = UIO_READ; 2328 auio.uio_segflg = UIO_USERSPACE; 2329 auio.uio_procp = p; 2330 auio.uio_resid = SCARG(uap, count); 2331 error = VOP_READLINK(vp, &auio, p->p_ucred); 2332 } 2333 vput(vp); 2334 *retval = SCARG(uap, count) - auio.uio_resid; 2335 return (error); 2336 } 2337 2338 /* 2339 * Change flags of a file given a path name. 2340 */ 2341 /* ARGSUSED */ 2342 int 2343 sys_chflags(l, v, retval) 2344 struct lwp *l; 2345 void *v; 2346 register_t *retval; 2347 { 2348 struct sys_chflags_args /* { 2349 syscallarg(const char *) path; 2350 syscallarg(u_long) flags; 2351 } */ *uap = v; 2352 struct proc *p = l->l_proc; 2353 struct vnode *vp; 2354 int error; 2355 struct nameidata nd; 2356 2357 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2358 if ((error = namei(&nd)) != 0) 2359 return (error); 2360 vp = nd.ni_vp; 2361 error = change_flags(vp, SCARG(uap, flags), p); 2362 vput(vp); 2363 return (error); 2364 } 2365 2366 /* 2367 * Change flags of a file given a file descriptor. 2368 */ 2369 /* ARGSUSED */ 2370 int 2371 sys_fchflags(l, v, retval) 2372 struct lwp *l; 2373 void *v; 2374 register_t *retval; 2375 { 2376 struct sys_fchflags_args /* { 2377 syscallarg(int) fd; 2378 syscallarg(u_long) flags; 2379 } */ *uap = v; 2380 struct proc *p = l->l_proc; 2381 struct vnode *vp; 2382 struct file *fp; 2383 int error; 2384 2385 /* getvnode() will use the descriptor for us */ 2386 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2387 return (error); 2388 vp = (struct vnode *)fp->f_data; 2389 error = change_flags(vp, SCARG(uap, flags), p); 2390 VOP_UNLOCK(vp, 0); 2391 FILE_UNUSE(fp, p); 2392 return (error); 2393 } 2394 2395 /* 2396 * Change flags of a file given a path name; this version does 2397 * not follow links. 2398 */ 2399 int 2400 sys_lchflags(l, v, retval) 2401 struct lwp *l; 2402 void *v; 2403 register_t *retval; 2404 { 2405 struct sys_lchflags_args /* { 2406 syscallarg(const char *) path; 2407 syscallarg(u_long) flags; 2408 } */ *uap = v; 2409 struct proc *p = l->l_proc; 2410 struct vnode *vp; 2411 int error; 2412 struct nameidata nd; 2413 2414 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2415 if ((error = namei(&nd)) != 0) 2416 return (error); 2417 vp = nd.ni_vp; 2418 error = change_flags(vp, SCARG(uap, flags), p); 2419 vput(vp); 2420 return (error); 2421 } 2422 2423 /* 2424 * Common routine to change flags of a file. 2425 */ 2426 int 2427 change_flags(vp, flags, p) 2428 struct vnode *vp; 2429 u_long flags; 2430 struct proc *p; 2431 { 2432 struct mount *mp; 2433 struct vattr vattr; 2434 int error; 2435 2436 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2437 return (error); 2438 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2439 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2440 /* 2441 * Non-superusers cannot change the flags on devices, even if they 2442 * own them. 2443 */ 2444 if (suser(p->p_ucred, &p->p_acflag) != 0) { 2445 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2446 goto out; 2447 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 2448 error = EINVAL; 2449 goto out; 2450 } 2451 } 2452 VATTR_NULL(&vattr); 2453 vattr.va_flags = flags; 2454 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2455 out: 2456 vn_finished_write(mp, 0); 2457 return (error); 2458 } 2459 2460 /* 2461 * Change mode of a file given path name; this version follows links. 2462 */ 2463 /* ARGSUSED */ 2464 int 2465 sys_chmod(l, v, retval) 2466 struct lwp *l; 2467 void *v; 2468 register_t *retval; 2469 { 2470 struct sys_chmod_args /* { 2471 syscallarg(const char *) path; 2472 syscallarg(int) mode; 2473 } */ *uap = v; 2474 struct proc *p = l->l_proc; 2475 int error; 2476 struct nameidata nd; 2477 2478 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2479 if ((error = namei(&nd)) != 0) 2480 return (error); 2481 2482 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2483 2484 vrele(nd.ni_vp); 2485 return (error); 2486 } 2487 2488 /* 2489 * Change mode of a file given a file descriptor. 2490 */ 2491 /* ARGSUSED */ 2492 int 2493 sys_fchmod(l, v, retval) 2494 struct lwp *l; 2495 void *v; 2496 register_t *retval; 2497 { 2498 struct sys_fchmod_args /* { 2499 syscallarg(int) fd; 2500 syscallarg(int) mode; 2501 } */ *uap = v; 2502 struct proc *p = l->l_proc; 2503 struct file *fp; 2504 int error; 2505 2506 /* getvnode() will use the descriptor for us */ 2507 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2508 return (error); 2509 2510 error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), p); 2511 FILE_UNUSE(fp, p); 2512 return (error); 2513 } 2514 2515 /* 2516 * Change mode of a file given path name; this version does not follow links. 2517 */ 2518 /* ARGSUSED */ 2519 int 2520 sys_lchmod(l, v, retval) 2521 struct lwp *l; 2522 void *v; 2523 register_t *retval; 2524 { 2525 struct sys_lchmod_args /* { 2526 syscallarg(const char *) path; 2527 syscallarg(int) mode; 2528 } */ *uap = v; 2529 struct proc *p = l->l_proc; 2530 int error; 2531 struct nameidata nd; 2532 2533 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2534 if ((error = namei(&nd)) != 0) 2535 return (error); 2536 2537 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2538 2539 vrele(nd.ni_vp); 2540 return (error); 2541 } 2542 2543 /* 2544 * Common routine to set mode given a vnode. 2545 */ 2546 static int 2547 change_mode(vp, mode, p) 2548 struct vnode *vp; 2549 int mode; 2550 struct proc *p; 2551 { 2552 struct mount *mp; 2553 struct vattr vattr; 2554 int error; 2555 2556 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2557 return (error); 2558 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2559 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2560 VATTR_NULL(&vattr); 2561 vattr.va_mode = mode & ALLPERMS; 2562 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2563 VOP_UNLOCK(vp, 0); 2564 vn_finished_write(mp, 0); 2565 return (error); 2566 } 2567 2568 /* 2569 * Set ownership given a path name; this version follows links. 2570 */ 2571 /* ARGSUSED */ 2572 int 2573 sys_chown(l, v, retval) 2574 struct lwp *l; 2575 void *v; 2576 register_t *retval; 2577 { 2578 struct sys_chown_args /* { 2579 syscallarg(const char *) path; 2580 syscallarg(uid_t) uid; 2581 syscallarg(gid_t) gid; 2582 } */ *uap = v; 2583 struct proc *p = l->l_proc; 2584 int error; 2585 struct nameidata nd; 2586 2587 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2588 if ((error = namei(&nd)) != 0) 2589 return (error); 2590 2591 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2592 2593 vrele(nd.ni_vp); 2594 return (error); 2595 } 2596 2597 /* 2598 * Set ownership given a path name; this version follows links. 2599 * Provides POSIX semantics. 2600 */ 2601 /* ARGSUSED */ 2602 int 2603 sys___posix_chown(l, v, retval) 2604 struct lwp *l; 2605 void *v; 2606 register_t *retval; 2607 { 2608 struct sys_chown_args /* { 2609 syscallarg(const char *) path; 2610 syscallarg(uid_t) uid; 2611 syscallarg(gid_t) gid; 2612 } */ *uap = v; 2613 struct proc *p = l->l_proc; 2614 int error; 2615 struct nameidata nd; 2616 2617 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2618 if ((error = namei(&nd)) != 0) 2619 return (error); 2620 2621 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2622 2623 vrele(nd.ni_vp); 2624 return (error); 2625 } 2626 2627 /* 2628 * Set ownership given a file descriptor. 2629 */ 2630 /* ARGSUSED */ 2631 int 2632 sys_fchown(l, v, retval) 2633 struct lwp *l; 2634 void *v; 2635 register_t *retval; 2636 { 2637 struct sys_fchown_args /* { 2638 syscallarg(int) fd; 2639 syscallarg(uid_t) uid; 2640 syscallarg(gid_t) gid; 2641 } */ *uap = v; 2642 struct proc *p = l->l_proc; 2643 int error; 2644 struct file *fp; 2645 2646 /* getvnode() will use the descriptor for us */ 2647 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2648 return (error); 2649 2650 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2651 SCARG(uap, gid), p, 0); 2652 FILE_UNUSE(fp, p); 2653 return (error); 2654 } 2655 2656 /* 2657 * Set ownership given a file descriptor, providing POSIX/XPG semantics. 2658 */ 2659 /* ARGSUSED */ 2660 int 2661 sys___posix_fchown(l, v, retval) 2662 struct lwp *l; 2663 void *v; 2664 register_t *retval; 2665 { 2666 struct sys_fchown_args /* { 2667 syscallarg(int) fd; 2668 syscallarg(uid_t) uid; 2669 syscallarg(gid_t) gid; 2670 } */ *uap = v; 2671 struct proc *p = l->l_proc; 2672 int error; 2673 struct file *fp; 2674 2675 /* getvnode() will use the descriptor for us */ 2676 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2677 return (error); 2678 2679 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2680 SCARG(uap, gid), p, 1); 2681 FILE_UNUSE(fp, p); 2682 return (error); 2683 } 2684 2685 /* 2686 * Set ownership given a path name; this version does not follow links. 2687 */ 2688 /* ARGSUSED */ 2689 int 2690 sys_lchown(l, v, retval) 2691 struct lwp *l; 2692 void *v; 2693 register_t *retval; 2694 { 2695 struct sys_lchown_args /* { 2696 syscallarg(const char *) path; 2697 syscallarg(uid_t) uid; 2698 syscallarg(gid_t) gid; 2699 } */ *uap = v; 2700 struct proc *p = l->l_proc; 2701 int error; 2702 struct nameidata nd; 2703 2704 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2705 if ((error = namei(&nd)) != 0) 2706 return (error); 2707 2708 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2709 2710 vrele(nd.ni_vp); 2711 return (error); 2712 } 2713 2714 /* 2715 * Set ownership given a path name; this version does not follow links. 2716 * Provides POSIX/XPG semantics. 2717 */ 2718 /* ARGSUSED */ 2719 int 2720 sys___posix_lchown(l, v, retval) 2721 struct lwp *l; 2722 void *v; 2723 register_t *retval; 2724 { 2725 struct sys_lchown_args /* { 2726 syscallarg(const char *) path; 2727 syscallarg(uid_t) uid; 2728 syscallarg(gid_t) gid; 2729 } */ *uap = v; 2730 struct proc *p = l->l_proc; 2731 int error; 2732 struct nameidata nd; 2733 2734 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2735 if ((error = namei(&nd)) != 0) 2736 return (error); 2737 2738 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2739 2740 vrele(nd.ni_vp); 2741 return (error); 2742 } 2743 2744 /* 2745 * Common routine to set ownership given a vnode. 2746 */ 2747 static int 2748 change_owner(vp, uid, gid, p, posix_semantics) 2749 struct vnode *vp; 2750 uid_t uid; 2751 gid_t gid; 2752 struct proc *p; 2753 int posix_semantics; 2754 { 2755 struct mount *mp; 2756 struct vattr vattr; 2757 mode_t newmode; 2758 int error; 2759 2760 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2761 return (error); 2762 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2763 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2764 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2765 goto out; 2766 2767 #define CHANGED(x) ((int)(x) != -1) 2768 newmode = vattr.va_mode; 2769 if (posix_semantics) { 2770 /* 2771 * POSIX/XPG semantics: if the caller is not the super-user, 2772 * clear set-user-id and set-group-id bits. Both POSIX and 2773 * the XPG consider the behaviour for calls by the super-user 2774 * implementation-defined; we leave the set-user-id and set- 2775 * group-id settings intact in that case. 2776 */ 2777 if (suser(p->p_ucred, NULL) != 0) 2778 newmode &= ~(S_ISUID | S_ISGID); 2779 } else { 2780 /* 2781 * NetBSD semantics: when changing owner and/or group, 2782 * clear the respective bit(s). 2783 */ 2784 if (CHANGED(uid)) 2785 newmode &= ~S_ISUID; 2786 if (CHANGED(gid)) 2787 newmode &= ~S_ISGID; 2788 } 2789 /* Update va_mode iff altered. */ 2790 if (vattr.va_mode == newmode) 2791 newmode = VNOVAL; 2792 2793 VATTR_NULL(&vattr); 2794 vattr.va_uid = CHANGED(uid) ? uid : (uid_t)VNOVAL; 2795 vattr.va_gid = CHANGED(gid) ? gid : (gid_t)VNOVAL; 2796 vattr.va_mode = newmode; 2797 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2798 #undef CHANGED 2799 2800 out: 2801 VOP_UNLOCK(vp, 0); 2802 vn_finished_write(mp, 0); 2803 return (error); 2804 } 2805 2806 /* 2807 * Set the access and modification times given a path name; this 2808 * version follows links. 2809 */ 2810 /* ARGSUSED */ 2811 int 2812 sys_utimes(l, v, retval) 2813 struct lwp *l; 2814 void *v; 2815 register_t *retval; 2816 { 2817 struct sys_utimes_args /* { 2818 syscallarg(const char *) path; 2819 syscallarg(const struct timeval *) tptr; 2820 } */ *uap = v; 2821 struct proc *p = l->l_proc; 2822 int error; 2823 struct nameidata nd; 2824 2825 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2826 if ((error = namei(&nd)) != 0) 2827 return (error); 2828 2829 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2830 2831 vrele(nd.ni_vp); 2832 return (error); 2833 } 2834 2835 /* 2836 * Set the access and modification times given a file descriptor. 2837 */ 2838 /* ARGSUSED */ 2839 int 2840 sys_futimes(l, v, retval) 2841 struct lwp *l; 2842 void *v; 2843 register_t *retval; 2844 { 2845 struct sys_futimes_args /* { 2846 syscallarg(int) fd; 2847 syscallarg(const struct timeval *) tptr; 2848 } */ *uap = v; 2849 struct proc *p = l->l_proc; 2850 int error; 2851 struct file *fp; 2852 2853 /* getvnode() will use the descriptor for us */ 2854 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2855 return (error); 2856 2857 error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), p); 2858 FILE_UNUSE(fp, p); 2859 return (error); 2860 } 2861 2862 /* 2863 * Set the access and modification times given a path name; this 2864 * version does not follow links. 2865 */ 2866 /* ARGSUSED */ 2867 int 2868 sys_lutimes(l, v, retval) 2869 struct lwp *l; 2870 void *v; 2871 register_t *retval; 2872 { 2873 struct sys_lutimes_args /* { 2874 syscallarg(const char *) path; 2875 syscallarg(const struct timeval *) tptr; 2876 } */ *uap = v; 2877 struct proc *p = l->l_proc; 2878 int error; 2879 struct nameidata nd; 2880 2881 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2882 if ((error = namei(&nd)) != 0) 2883 return (error); 2884 2885 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2886 2887 vrele(nd.ni_vp); 2888 return (error); 2889 } 2890 2891 /* 2892 * Common routine to set access and modification times given a vnode. 2893 */ 2894 static int 2895 change_utimes(vp, tptr, p) 2896 struct vnode *vp; 2897 const struct timeval *tptr; 2898 struct proc *p; 2899 { 2900 struct timeval tv[2]; 2901 struct mount *mp; 2902 struct vattr vattr; 2903 int error; 2904 2905 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2906 return (error); 2907 VATTR_NULL(&vattr); 2908 if (tptr == NULL) { 2909 microtime(&tv[0]); 2910 tv[1] = tv[0]; 2911 vattr.va_vaflags |= VA_UTIMES_NULL; 2912 } else { 2913 error = copyin(tptr, tv, sizeof(tv)); 2914 if (error) 2915 goto out; 2916 } 2917 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2918 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2919 vattr.va_atime.tv_sec = tv[0].tv_sec; 2920 vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000; 2921 vattr.va_mtime.tv_sec = tv[1].tv_sec; 2922 vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000; 2923 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2924 VOP_UNLOCK(vp, 0); 2925 out: 2926 vn_finished_write(mp, 0); 2927 return (error); 2928 } 2929 2930 /* 2931 * Truncate a file given its path name. 2932 */ 2933 /* ARGSUSED */ 2934 int 2935 sys_truncate(l, v, retval) 2936 struct lwp *l; 2937 void *v; 2938 register_t *retval; 2939 { 2940 struct sys_truncate_args /* { 2941 syscallarg(const char *) path; 2942 syscallarg(int) pad; 2943 syscallarg(off_t) length; 2944 } */ *uap = v; 2945 struct proc *p = l->l_proc; 2946 struct vnode *vp; 2947 struct mount *mp; 2948 struct vattr vattr; 2949 int error; 2950 struct nameidata nd; 2951 2952 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2953 if ((error = namei(&nd)) != 0) 2954 return (error); 2955 vp = nd.ni_vp; 2956 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2957 vrele(vp); 2958 return (error); 2959 } 2960 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2961 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2962 if (vp->v_type == VDIR) 2963 error = EISDIR; 2964 else if ((error = vn_writechk(vp)) == 0 && 2965 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) { 2966 VATTR_NULL(&vattr); 2967 vattr.va_size = SCARG(uap, length); 2968 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2969 } 2970 vput(vp); 2971 vn_finished_write(mp, 0); 2972 return (error); 2973 } 2974 2975 /* 2976 * Truncate a file given a file descriptor. 2977 */ 2978 /* ARGSUSED */ 2979 int 2980 sys_ftruncate(l, v, retval) 2981 struct lwp *l; 2982 void *v; 2983 register_t *retval; 2984 { 2985 struct sys_ftruncate_args /* { 2986 syscallarg(int) fd; 2987 syscallarg(int) pad; 2988 syscallarg(off_t) length; 2989 } */ *uap = v; 2990 struct proc *p = l->l_proc; 2991 struct mount *mp; 2992 struct vattr vattr; 2993 struct vnode *vp; 2994 struct file *fp; 2995 int error; 2996 2997 /* getvnode() will use the descriptor for us */ 2998 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2999 return (error); 3000 if ((fp->f_flag & FWRITE) == 0) { 3001 error = EINVAL; 3002 goto out; 3003 } 3004 vp = (struct vnode *)fp->f_data; 3005 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3006 FILE_UNUSE(fp, p); 3007 return (error); 3008 } 3009 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3010 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3011 if (vp->v_type == VDIR) 3012 error = EISDIR; 3013 else if ((error = vn_writechk(vp)) == 0) { 3014 VATTR_NULL(&vattr); 3015 vattr.va_size = SCARG(uap, length); 3016 error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); 3017 } 3018 VOP_UNLOCK(vp, 0); 3019 vn_finished_write(mp, 0); 3020 out: 3021 FILE_UNUSE(fp, p); 3022 return (error); 3023 } 3024 3025 /* 3026 * Sync an open file. 3027 */ 3028 /* ARGSUSED */ 3029 int 3030 sys_fsync(l, v, retval) 3031 struct lwp *l; 3032 void *v; 3033 register_t *retval; 3034 { 3035 struct sys_fsync_args /* { 3036 syscallarg(int) fd; 3037 } */ *uap = v; 3038 struct proc *p = l->l_proc; 3039 struct vnode *vp; 3040 struct mount *mp; 3041 struct file *fp; 3042 int error; 3043 3044 /* getvnode() will use the descriptor for us */ 3045 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3046 return (error); 3047 vp = (struct vnode *)fp->f_data; 3048 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3049 FILE_UNUSE(fp, p); 3050 return (error); 3051 } 3052 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3053 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, p); 3054 if (error == 0 && bioops.io_fsync != NULL && 3055 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3056 (*bioops.io_fsync)(vp, 0); 3057 VOP_UNLOCK(vp, 0); 3058 vn_finished_write(mp, 0); 3059 FILE_UNUSE(fp, p); 3060 return (error); 3061 } 3062 3063 /* 3064 * Sync a range of file data. API modeled after that found in AIX. 3065 * 3066 * FDATASYNC indicates that we need only save enough metadata to be able 3067 * to re-read the written data. Note we duplicate AIX's requirement that 3068 * the file be open for writing. 3069 */ 3070 /* ARGSUSED */ 3071 int 3072 sys_fsync_range(l, v, retval) 3073 struct lwp *l; 3074 void *v; 3075 register_t *retval; 3076 { 3077 struct sys_fsync_range_args /* { 3078 syscallarg(int) fd; 3079 syscallarg(int) flags; 3080 syscallarg(off_t) start; 3081 syscallarg(int) length; 3082 } */ *uap = v; 3083 struct proc *p = l->l_proc; 3084 struct vnode *vp; 3085 struct file *fp; 3086 int flags, nflags; 3087 off_t s, e, len; 3088 int error; 3089 3090 /* getvnode() will use the descriptor for us */ 3091 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3092 return (error); 3093 3094 if ((fp->f_flag & FWRITE) == 0) { 3095 FILE_UNUSE(fp, p); 3096 return (EBADF); 3097 } 3098 3099 flags = SCARG(uap, flags); 3100 if (((flags & (FDATASYNC | FFILESYNC)) == 0) || 3101 ((~flags & (FDATASYNC | FFILESYNC)) == 0)) { 3102 return (EINVAL); 3103 } 3104 /* Now set up the flags for value(s) to pass to VOP_FSYNC() */ 3105 if (flags & FDATASYNC) 3106 nflags = FSYNC_DATAONLY | FSYNC_WAIT; 3107 else 3108 nflags = FSYNC_WAIT; 3109 if (flags & FDISKSYNC) 3110 nflags |= FSYNC_CACHE; 3111 3112 len = SCARG(uap, length); 3113 /* If length == 0, we do the whole file, and s = l = 0 will do that */ 3114 if (len) { 3115 s = SCARG(uap, start); 3116 e = s + len; 3117 if (e < s) { 3118 FILE_UNUSE(fp, p); 3119 return (EINVAL); 3120 } 3121 } else { 3122 e = 0; 3123 s = 0; 3124 } 3125 3126 vp = (struct vnode *)fp->f_data; 3127 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3128 error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, p); 3129 3130 if (error == 0 && bioops.io_fsync != NULL && 3131 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3132 (*bioops.io_fsync)(vp, nflags); 3133 3134 VOP_UNLOCK(vp, 0); 3135 FILE_UNUSE(fp, p); 3136 return (error); 3137 } 3138 3139 /* 3140 * Sync the data of an open file. 3141 */ 3142 /* ARGSUSED */ 3143 int 3144 sys_fdatasync(l, v, retval) 3145 struct lwp *l; 3146 void *v; 3147 register_t *retval; 3148 { 3149 struct sys_fdatasync_args /* { 3150 syscallarg(int) fd; 3151 } */ *uap = v; 3152 struct proc *p = l->l_proc; 3153 struct vnode *vp; 3154 struct file *fp; 3155 int error; 3156 3157 /* getvnode() will use the descriptor for us */ 3158 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3159 return (error); 3160 if ((fp->f_flag & FWRITE) == 0) { 3161 FILE_UNUSE(fp, p); 3162 return (EBADF); 3163 } 3164 vp = (struct vnode *)fp->f_data; 3165 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3166 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, p); 3167 VOP_UNLOCK(vp, 0); 3168 FILE_UNUSE(fp, p); 3169 return (error); 3170 } 3171 3172 /* 3173 * Rename files, (standard) BSD semantics frontend. 3174 */ 3175 /* ARGSUSED */ 3176 int 3177 sys_rename(l, v, retval) 3178 struct lwp *l; 3179 void *v; 3180 register_t *retval; 3181 { 3182 struct sys_rename_args /* { 3183 syscallarg(const char *) from; 3184 syscallarg(const char *) to; 3185 } */ *uap = v; 3186 struct proc *p = l->l_proc; 3187 3188 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 0)); 3189 } 3190 3191 /* 3192 * Rename files, POSIX semantics frontend. 3193 */ 3194 /* ARGSUSED */ 3195 int 3196 sys___posix_rename(l, v, retval) 3197 struct lwp *l; 3198 void *v; 3199 register_t *retval; 3200 { 3201 struct sys___posix_rename_args /* { 3202 syscallarg(const char *) from; 3203 syscallarg(const char *) to; 3204 } */ *uap = v; 3205 struct proc *p = l->l_proc; 3206 3207 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 1)); 3208 } 3209 3210 /* 3211 * Rename files. Source and destination must either both be directories, 3212 * or both not be directories. If target is a directory, it must be empty. 3213 * If `from' and `to' refer to the same object, the value of the `retain' 3214 * argument is used to determine whether `from' will be 3215 * 3216 * (retain == 0) deleted unless `from' and `to' refer to the same 3217 * object in the file system's name space (BSD). 3218 * (retain == 1) always retained (POSIX). 3219 */ 3220 static int 3221 rename_files(from, to, p, retain) 3222 const char *from, *to; 3223 struct proc *p; 3224 int retain; 3225 { 3226 struct mount *mp = NULL; 3227 struct vnode *tvp, *fvp, *tdvp; 3228 struct nameidata fromnd, tond; 3229 int error; 3230 3231 NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, 3232 from, p); 3233 if ((error = namei(&fromnd)) != 0) 3234 return (error); 3235 fvp = fromnd.ni_vp; 3236 error = vn_start_write(fvp, &mp, V_WAIT | V_PCATCH); 3237 if (error != 0) { 3238 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3239 vrele(fromnd.ni_dvp); 3240 vrele(fvp); 3241 if (fromnd.ni_startdir) 3242 vrele(fromnd.ni_startdir); 3243 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3244 return (error); 3245 } 3246 NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | 3247 (fvp->v_type == VDIR ? CREATEDIR : 0), UIO_USERSPACE, to, p); 3248 if ((error = namei(&tond)) != 0) { 3249 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3250 vrele(fromnd.ni_dvp); 3251 vrele(fvp); 3252 goto out1; 3253 } 3254 tdvp = tond.ni_dvp; 3255 tvp = tond.ni_vp; 3256 3257 if (tvp != NULL) { 3258 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 3259 error = ENOTDIR; 3260 goto out; 3261 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 3262 error = EISDIR; 3263 goto out; 3264 } 3265 } 3266 3267 if (fvp == tdvp) 3268 error = EINVAL; 3269 3270 /* 3271 * Source and destination refer to the same object. 3272 */ 3273 if (fvp == tvp) { 3274 if (retain) 3275 error = -1; 3276 else if (fromnd.ni_dvp == tdvp && 3277 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 3278 !memcmp(fromnd.ni_cnd.cn_nameptr, 3279 tond.ni_cnd.cn_nameptr, 3280 fromnd.ni_cnd.cn_namelen)) 3281 error = -1; 3282 } 3283 3284 #ifdef VERIFIED_EXEC 3285 if (!error) 3286 error = veriexec_renamechk(fvp, fromnd.ni_dirp, tond.ni_dirp); 3287 #endif /* VERIFIED_EXEC */ 3288 3289 out: 3290 if (!error) { 3291 VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE); 3292 if (fromnd.ni_dvp != tdvp) 3293 VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3294 if (tvp) { 3295 VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE); 3296 } 3297 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 3298 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 3299 } else { 3300 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 3301 if (tdvp == tvp) 3302 vrele(tdvp); 3303 else 3304 vput(tdvp); 3305 if (tvp) 3306 vput(tvp); 3307 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3308 vrele(fromnd.ni_dvp); 3309 vrele(fvp); 3310 } 3311 vrele(tond.ni_startdir); 3312 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 3313 out1: 3314 vn_finished_write(mp, 0); 3315 if (fromnd.ni_startdir) 3316 vrele(fromnd.ni_startdir); 3317 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3318 return (error == -1 ? 0 : error); 3319 } 3320 3321 /* 3322 * Make a directory file. 3323 */ 3324 /* ARGSUSED */ 3325 int 3326 sys_mkdir(l, v, retval) 3327 struct lwp *l; 3328 void *v; 3329 register_t *retval; 3330 { 3331 struct sys_mkdir_args /* { 3332 syscallarg(const char *) path; 3333 syscallarg(int) mode; 3334 } */ *uap = v; 3335 struct proc *p = l->l_proc; 3336 struct mount *mp; 3337 struct vnode *vp; 3338 struct vattr vattr; 3339 int error; 3340 struct nameidata nd; 3341 3342 restart: 3343 NDINIT(&nd, CREATE, LOCKPARENT | CREATEDIR, UIO_USERSPACE, 3344 SCARG(uap, path), p); 3345 if ((error = namei(&nd)) != 0) 3346 return (error); 3347 vp = nd.ni_vp; 3348 if (vp != NULL) { 3349 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3350 if (nd.ni_dvp == vp) 3351 vrele(nd.ni_dvp); 3352 else 3353 vput(nd.ni_dvp); 3354 vrele(vp); 3355 return (EEXIST); 3356 } 3357 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3358 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3359 if (nd.ni_dvp == vp) 3360 vrele(nd.ni_dvp); 3361 else 3362 vput(nd.ni_dvp); 3363 if ((error = vn_start_write(NULL, &mp, 3364 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3365 return (error); 3366 goto restart; 3367 } 3368 VATTR_NULL(&vattr); 3369 vattr.va_type = VDIR; 3370 vattr.va_mode = 3371 (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask; 3372 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3373 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 3374 if (!error) 3375 vput(nd.ni_vp); 3376 vn_finished_write(mp, 0); 3377 return (error); 3378 } 3379 3380 /* 3381 * Remove a directory file. 3382 */ 3383 /* ARGSUSED */ 3384 int 3385 sys_rmdir(l, v, retval) 3386 struct lwp *l; 3387 void *v; 3388 register_t *retval; 3389 { 3390 struct sys_rmdir_args /* { 3391 syscallarg(const char *) path; 3392 } */ *uap = v; 3393 struct proc *p = l->l_proc; 3394 struct mount *mp; 3395 struct vnode *vp; 3396 int error; 3397 struct nameidata nd; 3398 3399 restart: 3400 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 3401 SCARG(uap, path), p); 3402 if ((error = namei(&nd)) != 0) 3403 return (error); 3404 vp = nd.ni_vp; 3405 if (vp->v_type != VDIR) { 3406 error = ENOTDIR; 3407 goto out; 3408 } 3409 /* 3410 * No rmdir "." please. 3411 */ 3412 if (nd.ni_dvp == vp) { 3413 error = EINVAL; 3414 goto out; 3415 } 3416 /* 3417 * The root of a mounted filesystem cannot be deleted. 3418 */ 3419 if (vp->v_flag & VROOT) { 3420 error = EBUSY; 3421 goto out; 3422 } 3423 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3424 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3425 if (nd.ni_dvp == vp) 3426 vrele(nd.ni_dvp); 3427 else 3428 vput(nd.ni_dvp); 3429 vput(vp); 3430 if ((error = vn_start_write(NULL, &mp, 3431 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3432 return (error); 3433 goto restart; 3434 } 3435 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3436 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3437 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 3438 vn_finished_write(mp, 0); 3439 return (error); 3440 3441 out: 3442 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3443 if (nd.ni_dvp == vp) 3444 vrele(nd.ni_dvp); 3445 else 3446 vput(nd.ni_dvp); 3447 vput(vp); 3448 return (error); 3449 } 3450 3451 /* 3452 * Read a block of directory entries in a file system independent format. 3453 */ 3454 int 3455 sys_getdents(l, v, retval) 3456 struct lwp *l; 3457 void *v; 3458 register_t *retval; 3459 { 3460 struct sys_getdents_args /* { 3461 syscallarg(int) fd; 3462 syscallarg(char *) buf; 3463 syscallarg(size_t) count; 3464 } */ *uap = v; 3465 struct proc *p = l->l_proc; 3466 struct file *fp; 3467 int error, done; 3468 3469 /* getvnode() will use the descriptor for us */ 3470 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3471 return (error); 3472 if ((fp->f_flag & FREAD) == 0) { 3473 error = EBADF; 3474 goto out; 3475 } 3476 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 3477 SCARG(uap, count), &done, p, 0, 0); 3478 #ifdef KTRACE 3479 if (!error && KTRPOINT(p, KTR_GENIO)) { 3480 struct iovec iov; 3481 iov.iov_base = SCARG(uap, buf); 3482 iov.iov_len = done; 3483 ktrgenio(p, SCARG(uap, fd), UIO_READ, &iov, done, 0); 3484 } 3485 #endif 3486 *retval = done; 3487 out: 3488 FILE_UNUSE(fp, p); 3489 return (error); 3490 } 3491 3492 /* 3493 * Set the mode mask for creation of filesystem nodes. 3494 */ 3495 int 3496 sys_umask(l, v, retval) 3497 struct lwp *l; 3498 void *v; 3499 register_t *retval; 3500 { 3501 struct sys_umask_args /* { 3502 syscallarg(mode_t) newmask; 3503 } */ *uap = v; 3504 struct proc *p = l->l_proc; 3505 struct cwdinfo *cwdi; 3506 3507 cwdi = p->p_cwdi; 3508 *retval = cwdi->cwdi_cmask; 3509 cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS; 3510 return (0); 3511 } 3512 3513 /* 3514 * Void all references to file by ripping underlying filesystem 3515 * away from vnode. 3516 */ 3517 /* ARGSUSED */ 3518 int 3519 sys_revoke(l, v, retval) 3520 struct lwp *l; 3521 void *v; 3522 register_t *retval; 3523 { 3524 struct sys_revoke_args /* { 3525 syscallarg(const char *) path; 3526 } */ *uap = v; 3527 struct proc *p = l->l_proc; 3528 struct mount *mp; 3529 struct vnode *vp; 3530 struct vattr vattr; 3531 int error; 3532 struct nameidata nd; 3533 3534 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3535 if ((error = namei(&nd)) != 0) 3536 return (error); 3537 vp = nd.ni_vp; 3538 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 3539 goto out; 3540 if (p->p_ucred->cr_uid != vattr.va_uid && 3541 (error = suser(p->p_ucred, &p->p_acflag)) != 0) 3542 goto out; 3543 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 3544 goto out; 3545 if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER))) 3546 VOP_REVOKE(vp, REVOKEALL); 3547 vn_finished_write(mp, 0); 3548 out: 3549 vrele(vp); 3550 return (error); 3551 } 3552 3553 /* 3554 * Convert a user file descriptor to a kernel file entry. 3555 */ 3556 int 3557 getvnode(fdp, fd, fpp) 3558 struct filedesc *fdp; 3559 int fd; 3560 struct file **fpp; 3561 { 3562 struct vnode *vp; 3563 struct file *fp; 3564 3565 if ((fp = fd_getfile(fdp, fd)) == NULL) 3566 return (EBADF); 3567 3568 FILE_USE(fp); 3569 3570 if (fp->f_type != DTYPE_VNODE) { 3571 FILE_UNUSE(fp, NULL); 3572 return (EINVAL); 3573 } 3574 3575 vp = (struct vnode *)fp->f_data; 3576 if (vp->v_type == VBAD) { 3577 FILE_UNUSE(fp, NULL); 3578 return (EBADF); 3579 } 3580 3581 *fpp = fp; 3582 return (0); 3583 } 3584 3585 /* 3586 * Push extended attribute configuration information into the VFS. 3587 * 3588 * NOTE: Not all file systems that support extended attributes will 3589 * require the use of this system call. 3590 */ 3591 int 3592 sys_extattrctl(struct lwp *l, void *v, register_t *retval) 3593 { 3594 struct sys_extattrctl_args /* { 3595 syscallarg(const char *) path; 3596 syscallarg(int) cmd; 3597 syscallarg(const char *) filename; 3598 syscallarg(int) attrnamespace; 3599 syscallarg(const char *) attrname; 3600 } */ *uap = v; 3601 struct proc *p = l->l_proc; 3602 struct vnode *vp; 3603 struct nameidata nd; 3604 struct mount *mp; 3605 char attrname[EXTATTR_MAXNAMELEN]; 3606 int error; 3607 3608 if (SCARG(uap, attrname) != NULL) { 3609 error = copyinstr(SCARG(uap, attrname), attrname, 3610 sizeof(attrname), NULL); 3611 if (error) 3612 return (error); 3613 } 3614 3615 vp = NULL; 3616 if (SCARG(uap, filename) != NULL) { 3617 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 3618 SCARG(uap, filename), p); 3619 error = namei(&nd); 3620 if (error) 3621 return (error); 3622 vp = nd.ni_vp; 3623 } 3624 3625 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3626 error = namei(&nd); 3627 if (error) { 3628 if (vp != NULL) 3629 vput(vp); 3630 return (error); 3631 } 3632 3633 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 3634 if (error) { 3635 if (vp != NULL) 3636 vput(vp); 3637 return (error); 3638 } 3639 3640 error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp, 3641 SCARG(uap, attrnamespace), 3642 SCARG(uap, attrname) != NULL ? attrname : NULL, p); 3643 3644 vn_finished_write(mp, 0); 3645 3646 if (vp != NULL) 3647 vrele(vp); 3648 3649 return (error); 3650 } 3651 3652 /* 3653 * Set a named extended attribute on a file or directory. 3654 */ 3655 static int 3656 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3657 const void *data, size_t nbytes, struct proc *p, register_t *retval) 3658 { 3659 struct mount *mp; 3660 struct uio auio; 3661 struct iovec aiov; 3662 ssize_t cnt; 3663 int error; 3664 3665 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3666 if (error) 3667 return (error); 3668 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3669 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3670 3671 aiov.iov_base = (caddr_t) data; /* XXX kills const */ 3672 aiov.iov_len = nbytes; 3673 auio.uio_iov = &aiov; 3674 auio.uio_iovcnt = 1; 3675 auio.uio_offset = 0; 3676 if (nbytes > INT_MAX) { 3677 error = EINVAL; 3678 goto done; 3679 } 3680 auio.uio_resid = nbytes; 3681 auio.uio_rw = UIO_WRITE; 3682 auio.uio_segflg = UIO_USERSPACE; 3683 auio.uio_procp = p; 3684 cnt = nbytes; 3685 3686 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, 3687 p->p_ucred, p); 3688 cnt -= auio.uio_resid; 3689 retval[0] = cnt; 3690 3691 done: 3692 VOP_UNLOCK(vp, 0); 3693 vn_finished_write(mp, 0); 3694 return (error); 3695 } 3696 3697 int 3698 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval) 3699 { 3700 struct sys_extattr_set_fd_args /* { 3701 syscallarg(int) fd; 3702 syscallarg(int) attrnamespace; 3703 syscallarg(const char *) attrname; 3704 syscallarg(const void *) data; 3705 syscallarg(size_t) nbytes; 3706 } */ *uap = v; 3707 struct proc *p = l->l_proc; 3708 struct file *fp; 3709 struct vnode *vp; 3710 char attrname[EXTATTR_MAXNAMELEN]; 3711 int error; 3712 3713 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3714 NULL); 3715 if (error) 3716 return (error); 3717 3718 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3719 if (error) 3720 return (error); 3721 vp = (struct vnode *) fp->f_data; 3722 3723 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, 3724 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3725 3726 FILE_UNUSE(fp, p); 3727 return (error); 3728 } 3729 3730 int 3731 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval) 3732 { 3733 struct sys_extattr_set_file_args /* { 3734 syscallarg(const char *) path; 3735 syscallarg(int) attrnamespace; 3736 syscallarg(const char *) attrname; 3737 syscallarg(const void *) data; 3738 syscallarg(size_t) nbytes; 3739 } */ *uap = v; 3740 struct proc *p = l->l_proc; 3741 struct nameidata nd; 3742 char attrname[EXTATTR_MAXNAMELEN]; 3743 int error; 3744 3745 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3746 NULL); 3747 if (error) 3748 return (error); 3749 3750 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3751 error = namei(&nd); 3752 if (error) 3753 return (error); 3754 3755 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3756 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3757 3758 vrele(nd.ni_vp); 3759 return (error); 3760 } 3761 3762 int 3763 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval) 3764 { 3765 struct sys_extattr_set_link_args /* { 3766 syscallarg(const char *) path; 3767 syscallarg(int) attrnamespace; 3768 syscallarg(const char *) attrname; 3769 syscallarg(const void *) data; 3770 syscallarg(size_t) nbytes; 3771 } */ *uap = v; 3772 struct proc *p = l->l_proc; 3773 struct nameidata nd; 3774 char attrname[EXTATTR_MAXNAMELEN]; 3775 int error; 3776 3777 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3778 NULL); 3779 if (error) 3780 return (error); 3781 3782 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3783 error = namei(&nd); 3784 if (error) 3785 return (error); 3786 3787 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3788 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3789 3790 vrele(nd.ni_vp); 3791 return (error); 3792 } 3793 3794 /* 3795 * Get a named extended attribute on a file or directory. 3796 */ 3797 static int 3798 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3799 void *data, size_t nbytes, struct proc *p, register_t *retval) 3800 { 3801 struct uio auio, *auiop; 3802 struct iovec aiov; 3803 ssize_t cnt; 3804 size_t size, *sizep; 3805 int error; 3806 3807 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 3808 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3809 3810 /* 3811 * Slightly unusual semantics: if the user provides a NULL data 3812 * pointer, they don't want to receive the data, just the maximum 3813 * read length. 3814 */ 3815 auiop = NULL; 3816 sizep = NULL; 3817 cnt = 0; 3818 if (data != NULL) { 3819 aiov.iov_base = data; 3820 aiov.iov_len = nbytes; 3821 auio.uio_iov = &aiov; 3822 auio.uio_offset = 0; 3823 if (nbytes > INT_MAX) { 3824 error = EINVAL; 3825 goto done; 3826 } 3827 auio.uio_resid = nbytes; 3828 auio.uio_rw = UIO_READ; 3829 auio.uio_segflg = UIO_USERSPACE; 3830 auio.uio_procp = p; 3831 auiop = &auio; 3832 cnt = nbytes; 3833 } else 3834 sizep = &size; 3835 3836 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, 3837 p->p_ucred, p); 3838 3839 if (auiop != NULL) { 3840 cnt -= auio.uio_resid; 3841 retval[0] = cnt; 3842 } else 3843 retval[0] = size; 3844 3845 done: 3846 VOP_UNLOCK(vp, 0); 3847 return (error); 3848 } 3849 3850 int 3851 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval) 3852 { 3853 struct sys_extattr_get_fd_args /* { 3854 syscallarg(int) fd; 3855 syscallarg(int) attrnamespace; 3856 syscallarg(const char *) attrname; 3857 syscallarg(void *) data; 3858 syscallarg(size_t) nbytes; 3859 } */ *uap = v; 3860 struct proc *p = l->l_proc; 3861 struct file *fp; 3862 struct vnode *vp; 3863 char attrname[EXTATTR_MAXNAMELEN]; 3864 int error; 3865 3866 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3867 NULL); 3868 if (error) 3869 return (error); 3870 3871 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3872 if (error) 3873 return (error); 3874 vp = (struct vnode *) fp->f_data; 3875 3876 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, 3877 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3878 3879 FILE_UNUSE(fp, p); 3880 return (error); 3881 } 3882 3883 int 3884 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval) 3885 { 3886 struct sys_extattr_get_file_args /* { 3887 syscallarg(const char *) path; 3888 syscallarg(int) attrnamespace; 3889 syscallarg(const char *) attrname; 3890 syscallarg(void *) data; 3891 syscallarg(size_t) nbytes; 3892 } */ *uap = v; 3893 struct proc *p = l->l_proc; 3894 struct nameidata nd; 3895 char attrname[EXTATTR_MAXNAMELEN]; 3896 int error; 3897 3898 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3899 NULL); 3900 if (error) 3901 return (error); 3902 3903 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3904 error = namei(&nd); 3905 if (error) 3906 return (error); 3907 3908 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3909 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3910 3911 vrele(nd.ni_vp); 3912 return (error); 3913 } 3914 3915 int 3916 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval) 3917 { 3918 struct sys_extattr_get_link_args /* { 3919 syscallarg(const char *) path; 3920 syscallarg(int) attrnamespace; 3921 syscallarg(const char *) attrname; 3922 syscallarg(void *) data; 3923 syscallarg(size_t) nbytes; 3924 } */ *uap = v; 3925 struct proc *p = l->l_proc; 3926 struct nameidata nd; 3927 char attrname[EXTATTR_MAXNAMELEN]; 3928 int error; 3929 3930 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3931 NULL); 3932 if (error) 3933 return (error); 3934 3935 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3936 error = namei(&nd); 3937 if (error) 3938 return (error); 3939 3940 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3941 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3942 3943 vrele(nd.ni_vp); 3944 return (error); 3945 } 3946 3947 /* 3948 * Delete a named extended attribute on a file or directory. 3949 */ 3950 static int 3951 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3952 struct proc *p) 3953 { 3954 struct mount *mp; 3955 int error; 3956 3957 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3958 if (error) 3959 return (error); 3960 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3961 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3962 3963 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, p->p_ucred, p); 3964 if (error == EOPNOTSUPP) 3965 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, 3966 p->p_ucred, p); 3967 3968 VOP_UNLOCK(vp, 0); 3969 vn_finished_write(mp, 0); 3970 return (error); 3971 } 3972 3973 int 3974 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval) 3975 { 3976 struct sys_extattr_delete_fd_args /* { 3977 syscallarg(int) fd; 3978 syscallarg(int) attrnamespace; 3979 syscallarg(const char *) attrname; 3980 } */ *uap = v; 3981 struct proc *p = l->l_proc; 3982 struct file *fp; 3983 struct vnode *vp; 3984 char attrname[EXTATTR_MAXNAMELEN]; 3985 int error; 3986 3987 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3988 NULL); 3989 if (error) 3990 return (error); 3991 3992 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3993 if (error) 3994 return (error); 3995 vp = (struct vnode *) fp->f_data; 3996 3997 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, p); 3998 3999 FILE_UNUSE(fp, p); 4000 return (error); 4001 } 4002 4003 int 4004 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval) 4005 { 4006 struct sys_extattr_delete_file_args /* { 4007 syscallarg(const char *) path; 4008 syscallarg(int) attrnamespace; 4009 syscallarg(const char *) attrname; 4010 } */ *uap = v; 4011 struct proc *p = l->l_proc; 4012 struct nameidata nd; 4013 char attrname[EXTATTR_MAXNAMELEN]; 4014 int error; 4015 4016 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4017 NULL); 4018 if (error) 4019 return (error); 4020 4021 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4022 error = namei(&nd); 4023 if (error) 4024 return (error); 4025 4026 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4027 p); 4028 4029 vrele(nd.ni_vp); 4030 return (error); 4031 } 4032 4033 int 4034 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval) 4035 { 4036 struct sys_extattr_delete_link_args /* { 4037 syscallarg(const char *) path; 4038 syscallarg(int) attrnamespace; 4039 syscallarg(const char *) attrname; 4040 } */ *uap = v; 4041 struct proc *p = l->l_proc; 4042 struct nameidata nd; 4043 char attrname[EXTATTR_MAXNAMELEN]; 4044 int error; 4045 4046 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4047 NULL); 4048 if (error) 4049 return (error); 4050 4051 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4052 error = namei(&nd); 4053 if (error) 4054 return (error); 4055 4056 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4057 p); 4058 4059 vrele(nd.ni_vp); 4060 return (error); 4061 } 4062 4063 /* 4064 * Retrieve a list of extended attributes on a file or directory. 4065 */ 4066 static int 4067 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, 4068 struct proc *p, register_t *retval) 4069 { 4070 struct uio auio, *auiop; 4071 size_t size, *sizep; 4072 struct iovec aiov; 4073 ssize_t cnt; 4074 int error; 4075 4076 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 4077 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 4078 4079 auiop = NULL; 4080 sizep = NULL; 4081 cnt = 0; 4082 if (data != NULL) { 4083 aiov.iov_base = data; 4084 aiov.iov_len = nbytes; 4085 auio.uio_iov = &aiov; 4086 auio.uio_offset = 0; 4087 if (nbytes > INT_MAX) { 4088 error = EINVAL; 4089 goto done; 4090 } 4091 auio.uio_resid = nbytes; 4092 auio.uio_rw = UIO_READ; 4093 auio.uio_segflg = UIO_USERSPACE; 4094 auio.uio_procp = p; 4095 auiop = &auio; 4096 cnt = nbytes; 4097 } else 4098 sizep = &size; 4099 4100 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, 4101 p->p_ucred, p); 4102 4103 if (auiop != NULL) { 4104 cnt -= auio.uio_resid; 4105 retval[0] = cnt; 4106 } else 4107 retval[0] = size; 4108 4109 done: 4110 VOP_UNLOCK(vp, 0); 4111 return (error); 4112 } 4113 4114 int 4115 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval) 4116 { 4117 struct sys_extattr_list_fd_args /* { 4118 syscallarg(int) fd; 4119 syscallarg(int) attrnamespace; 4120 syscallarg(void *) data; 4121 syscallarg(size_t) nbytes; 4122 } */ *uap = v; 4123 struct proc *p = l->l_proc; 4124 struct file *fp; 4125 struct vnode *vp; 4126 int error; 4127 4128 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 4129 if (error) 4130 return (error); 4131 vp = (struct vnode *) fp->f_data; 4132 4133 error = extattr_list_vp(vp, SCARG(uap, attrnamespace), 4134 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4135 4136 FILE_UNUSE(fp, p); 4137 return (error); 4138 } 4139 4140 int 4141 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval) 4142 { 4143 struct sys_extattr_list_file_args /* { 4144 syscallarg(const char *) path; 4145 syscallarg(int) attrnamespace; 4146 syscallarg(void *) data; 4147 syscallarg(size_t) nbytes; 4148 } */ *uap = v; 4149 struct proc *p = l->l_proc; 4150 struct nameidata nd; 4151 int error; 4152 4153 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4154 error = namei(&nd); 4155 if (error) 4156 return (error); 4157 4158 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4159 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4160 4161 vrele(nd.ni_vp); 4162 return (error); 4163 } 4164 4165 int 4166 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval) 4167 { 4168 struct sys_extattr_list_link_args /* { 4169 syscallarg(const char *) path; 4170 syscallarg(int) attrnamespace; 4171 syscallarg(void *) data; 4172 syscallarg(size_t) nbytes; 4173 } */ *uap = v; 4174 struct proc *p = l->l_proc; 4175 struct nameidata nd; 4176 int error; 4177 4178 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4179 error = namei(&nd); 4180 if (error) 4181 return (error); 4182 4183 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4184 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4185 4186 vrele(nd.ni_vp); 4187 return (error); 4188 } 4189
Indexes created Fri Oct 03 17:10:05 GMT 2025