vfs_syscalls.c revision 1.190.2.8
1 /* $NetBSD: vfs_syscalls.c,v 1.190.2.8 2005/01/17 19:32:26 skrll 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 1.190.2.8 2005/01/17 19:32:26 skrll 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 68 #include <miscfs/genfs/genfs.h> 69 #include <miscfs/syncfs/syncfs.h> 70 71 #if NFSS > 0 72 #include <dev/fssvar.h> 73 #endif 74 75 MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct"); 76 77 static int change_dir(struct nameidata *, struct lwp *); 78 static int change_flags(struct vnode *, u_long, struct lwp *); 79 static int change_mode(struct vnode *, int, struct lwp *l); 80 static int change_owner(struct vnode *, uid_t, gid_t, struct lwp *, int); 81 static int change_utimes(struct vnode *vp, const struct timeval *, 82 struct lwp *l); 83 static int rename_files(const char *, const char *, struct lwp *, int); 84 85 void checkdirs(struct vnode *); 86 87 int dovfsusermount = 0; 88 89 /* 90 * Virtual File System System Calls 91 */ 92 93 /* 94 * Mount a file system. 95 */ 96 97 #if defined(COMPAT_09) || defined(COMPAT_43) 98 /* 99 * This table is used to maintain compatibility with 4.3BSD 100 * and NetBSD 0.9 mount syscalls. Note, the order is important! 101 * 102 * Do not modify this table. It should only contain filesystems 103 * supported by NetBSD 0.9 and 4.3BSD. 104 */ 105 const char * const mountcompatnames[] = { 106 NULL, /* 0 = MOUNT_NONE */ 107 MOUNT_FFS, /* 1 = MOUNT_UFS */ 108 MOUNT_NFS, /* 2 */ 109 MOUNT_MFS, /* 3 */ 110 MOUNT_MSDOS, /* 4 */ 111 MOUNT_CD9660, /* 5 = MOUNT_ISOFS */ 112 MOUNT_FDESC, /* 6 */ 113 MOUNT_KERNFS, /* 7 */ 114 NULL, /* 8 = MOUNT_DEVFS */ 115 MOUNT_AFS, /* 9 */ 116 }; 117 const int nmountcompatnames = sizeof(mountcompatnames) / 118 sizeof(mountcompatnames[0]); 119 #endif /* COMPAT_09 || COMPAT_43 */ 120 121 /* ARGSUSED */ 122 int 123 sys_mount(l, v, retval) 124 struct lwp *l; 125 void *v; 126 register_t *retval; 127 { 128 struct sys_mount_args /* { 129 syscallarg(const char *) type; 130 syscallarg(const char *) path; 131 syscallarg(int) flags; 132 syscallarg(void *) data; 133 } */ *uap = v; 134 struct proc *p = l->l_proc; 135 struct vnode *vp; 136 struct mount *mp; 137 int error, flag = 0; 138 char fstypename[MFSNAMELEN]; 139 struct vattr va; 140 struct nameidata nd; 141 struct vfsops *vfs; 142 143 if (dovfsusermount == 0 && (SCARG(uap, flags) & MNT_GETARGS) == 0 && 144 (error = suser(p->p_ucred, &p->p_acflag))) 145 return (error); 146 /* 147 * Get vnode to be covered 148 */ 149 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 150 SCARG(uap, path), l); 151 if ((error = namei(&nd)) != 0) 152 return (error); 153 vp = nd.ni_vp; 154 /* 155 * A lookup in VFS_MOUNT might result in an attempt to 156 * lock this vnode again, so make the lock recursive. 157 */ 158 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE); 159 if (SCARG(uap, flags) & (MNT_UPDATE | MNT_GETARGS)) { 160 if ((vp->v_flag & VROOT) == 0) { 161 vput(vp); 162 return (EINVAL); 163 } 164 mp = vp->v_mount; 165 flag = mp->mnt_flag; 166 vfs = mp->mnt_op; 167 /* 168 * We only allow the filesystem to be reloaded if it 169 * is currently mounted read-only. 170 */ 171 if ((SCARG(uap, flags) & MNT_RELOAD) && 172 ((mp->mnt_flag & MNT_RDONLY) == 0)) { 173 vput(vp); 174 return (EOPNOTSUPP); /* Needs translation */ 175 } 176 /* 177 * In "highly secure" mode, don't let the caller do anything 178 * but downgrade a filesystem from read-write to read-only. 179 * (see also below; MNT_UPDATE or MNT_GETARGS is required.) 180 */ 181 if (securelevel >= 2 && 182 SCARG(uap, flags) != MNT_GETARGS && 183 SCARG(uap, flags) != 184 (mp->mnt_flag | MNT_RDONLY | 185 MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) { 186 vput(vp); 187 return (EPERM); 188 } 189 mp->mnt_flag |= SCARG(uap, flags) & 190 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 191 /* 192 * Only root, or the user that did the original mount is 193 * permitted to update it. 194 */ 195 if ((mp->mnt_flag & MNT_GETARGS) == 0 && 196 mp->mnt_stat.f_owner != p->p_ucred->cr_uid && 197 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 198 vput(vp); 199 return (error); 200 } 201 /* 202 * Do not allow NFS export by non-root users. For non-root 203 * users, silently enforce MNT_NOSUID and MNT_NODEV, and 204 * MNT_NOEXEC if mount point is already MNT_NOEXEC. 205 */ 206 if (p->p_ucred->cr_uid != 0) { 207 if (SCARG(uap, flags) & MNT_EXPORTED) { 208 vput(vp); 209 return (EPERM); 210 } 211 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 212 if (flag & MNT_NOEXEC) 213 SCARG(uap, flags) |= MNT_NOEXEC; 214 } 215 if (vfs_busy(mp, LK_NOWAIT, 0)) { 216 vput(vp); 217 return (EPERM); 218 } 219 goto update; 220 } else { 221 if (securelevel >= 2) { 222 vput(vp); 223 return (EPERM); 224 } 225 } 226 /* 227 * If the user is not root, ensure that they own the directory 228 * onto which we are attempting to mount. 229 */ 230 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, l)) != 0 || 231 (va.va_uid != p->p_ucred->cr_uid && 232 (error = suser(p->p_ucred, &p->p_acflag)) != 0)) { 233 vput(vp); 234 return (error); 235 } 236 /* 237 * Do not allow NFS export by non-root users. For non-root users, 238 * silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the 239 * mount point is already MNT_NOEXEC. 240 */ 241 if (p->p_ucred->cr_uid != 0) { 242 if (SCARG(uap, flags) & MNT_EXPORTED) { 243 vput(vp); 244 return (EPERM); 245 } 246 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 247 if (vp->v_mount->mnt_flag & MNT_NOEXEC) 248 SCARG(uap, flags) |= MNT_NOEXEC; 249 } 250 if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, l, 0, 0)) != 0) { 251 vput(vp); 252 return (error); 253 } 254 if (vp->v_type != VDIR) { 255 vput(vp); 256 return (ENOTDIR); 257 } 258 error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL); 259 if (error) { 260 #if defined(COMPAT_09) || defined(COMPAT_43) 261 /* 262 * Historically filesystem types were identified by number. 263 * If we get an integer for the filesystem type instead of a 264 * string, we check to see if it matches one of the historic 265 * filesystem types. 266 */ 267 u_long fsindex = (u_long)SCARG(uap, type); 268 if (fsindex >= nmountcompatnames || 269 mountcompatnames[fsindex] == NULL) { 270 vput(vp); 271 return (ENODEV); 272 } 273 strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN); 274 #else 275 vput(vp); 276 return (error); 277 #endif 278 } 279 #ifdef COMPAT_10 280 /* Accept `ufs' as an alias for `ffs'. */ 281 if (!strncmp(fstypename, "ufs", MFSNAMELEN)) 282 strncpy(fstypename, "ffs", MFSNAMELEN); 283 #endif 284 if ((vfs = vfs_getopsbyname(fstypename)) == NULL) { 285 vput(vp); 286 return (ENODEV); 287 } 288 if (vp->v_mountedhere != NULL) { 289 vput(vp); 290 return (EBUSY); 291 } 292 293 /* 294 * Allocate and initialize the file system. 295 */ 296 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 297 M_MOUNT, M_WAITOK); 298 memset((char *)mp, 0, (u_long)sizeof(struct mount)); 299 lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0); 300 simple_lock_init(&mp->mnt_slock); 301 (void)vfs_busy(mp, LK_NOWAIT, 0); 302 mp->mnt_op = vfs; 303 vfs->vfs_refcount++; 304 mp->mnt_vnodecovered = vp; 305 mp->mnt_stat.f_owner = p->p_ucred->cr_uid; 306 mp->mnt_unmounter = NULL; 307 mp->mnt_leaf = mp; 308 309 /* 310 * The underlying file system may refuse the mount for 311 * various reasons. Allow the user to force it to happen. 312 */ 313 mp->mnt_flag |= SCARG(uap, flags) & MNT_FORCE; 314 update: 315 /* 316 * Set the mount level flags. 317 */ 318 if (SCARG(uap, flags) & MNT_RDONLY) 319 mp->mnt_flag |= MNT_RDONLY; 320 else if (mp->mnt_flag & MNT_RDONLY) 321 mp->mnt_iflag |= IMNT_WANTRDWR; 322 mp->mnt_flag &= 323 ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 324 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 325 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP); 326 mp->mnt_flag |= SCARG(uap, flags) & 327 (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 328 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 329 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP | 330 MNT_IGNORE); 331 /* 332 * Mount the filesystem. 333 */ 334 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, l); 335 if (mp->mnt_flag & (MNT_UPDATE | MNT_GETARGS)) { 336 if (mp->mnt_iflag & IMNT_WANTRDWR) 337 mp->mnt_flag &= ~MNT_RDONLY; 338 if (error || (mp->mnt_flag & MNT_GETARGS)) 339 mp->mnt_flag = flag; 340 mp->mnt_flag &=~ 341 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 342 mp->mnt_iflag &=~ IMNT_WANTRDWR; 343 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) { 344 if (mp->mnt_syncer == NULL) 345 error = vfs_allocate_syncvnode(mp); 346 } else { 347 if (mp->mnt_syncer != NULL) 348 vfs_deallocate_syncvnode(mp); 349 } 350 vfs_unbusy(mp); 351 VOP_UNLOCK(vp, 0); 352 vrele(vp); 353 return (error); 354 } 355 /* 356 * Put the new filesystem on the mount list after root. 357 */ 358 cache_purge(vp); 359 if (!error) { 360 mp->mnt_flag &=~ 361 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 362 mp->mnt_iflag &=~ IMNT_WANTRDWR; 363 vp->v_mountedhere = mp; 364 simple_lock(&mountlist_slock); 365 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 366 simple_unlock(&mountlist_slock); 367 checkdirs(vp); 368 VOP_UNLOCK(vp, 0); 369 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 370 error = vfs_allocate_syncvnode(mp); 371 vfs_unbusy(mp); 372 (void) VFS_STATVFS(mp, &mp->mnt_stat, l); 373 if ((error = VFS_START(mp, 0, l))) 374 vrele(vp); 375 } else { 376 vp->v_mountedhere = (struct mount *)0; 377 vfs->vfs_refcount--; 378 vfs_unbusy(mp); 379 free(mp, M_MOUNT); 380 vput(vp); 381 } 382 return (error); 383 } 384 385 /* 386 * Scan all active processes to see if any of them have a current 387 * or root directory onto which the new filesystem has just been 388 * mounted. If so, replace them with the new mount point. 389 */ 390 void 391 checkdirs(olddp) 392 struct vnode *olddp; 393 { 394 struct cwdinfo *cwdi; 395 struct vnode *newdp; 396 struct proc *p; 397 398 if (olddp->v_usecount == 1) 399 return; 400 if (VFS_ROOT(olddp->v_mountedhere, &newdp)) 401 panic("mount: lost mount"); 402 proclist_lock_read(); 403 PROCLIST_FOREACH(p, &allproc) { 404 cwdi = p->p_cwdi; 405 if (cwdi->cwdi_cdir == olddp) { 406 vrele(cwdi->cwdi_cdir); 407 VREF(newdp); 408 cwdi->cwdi_cdir = newdp; 409 } 410 if (cwdi->cwdi_rdir == olddp) { 411 vrele(cwdi->cwdi_rdir); 412 VREF(newdp); 413 cwdi->cwdi_rdir = newdp; 414 } 415 } 416 proclist_unlock_read(); 417 if (rootvnode == olddp) { 418 vrele(rootvnode); 419 VREF(newdp); 420 rootvnode = newdp; 421 } 422 vput(newdp); 423 } 424 425 /* 426 * Unmount a file system. 427 * 428 * Note: unmount takes a path to the vnode mounted on as argument, 429 * not special file (as before). 430 */ 431 /* ARGSUSED */ 432 int 433 sys_unmount(l, v, retval) 434 struct lwp *l; 435 void *v; 436 register_t *retval; 437 { 438 struct sys_unmount_args /* { 439 syscallarg(const char *) path; 440 syscallarg(int) flags; 441 } */ *uap = v; 442 struct proc *p = l->l_proc; 443 struct vnode *vp; 444 struct mount *mp; 445 int error; 446 struct nameidata nd; 447 448 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 449 SCARG(uap, path), l); 450 if ((error = namei(&nd)) != 0) 451 return (error); 452 vp = nd.ni_vp; 453 mp = vp->v_mount; 454 455 /* 456 * Only root, or the user that did the original mount is 457 * permitted to unmount this filesystem. 458 */ 459 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) && 460 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 461 vput(vp); 462 return (error); 463 } 464 465 /* 466 * Don't allow unmounting the root file system. 467 */ 468 if (mp->mnt_flag & MNT_ROOTFS) { 469 vput(vp); 470 return (EINVAL); 471 } 472 473 /* 474 * Must be the root of the filesystem 475 */ 476 if ((vp->v_flag & VROOT) == 0) { 477 vput(vp); 478 return (EINVAL); 479 } 480 vput(vp); 481 482 /* 483 * XXX Freeze syncer. Must do this before locking the 484 * mount point. See dounmount() for details. 485 */ 486 lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL); 487 488 if (vfs_busy(mp, 0, 0)) { 489 lockmgr(&syncer_lock, LK_RELEASE, NULL); 490 return (EBUSY); 491 } 492 493 return (dounmount(mp, SCARG(uap, flags), l)); 494 } 495 496 /* 497 * Do the actual file system unmount. File system is assumed to have been 498 * marked busy by the caller. 499 */ 500 int 501 dounmount(mp, flags, l) 502 struct mount *mp; 503 int flags; 504 struct lwp *l; 505 { 506 struct vnode *coveredvp; 507 int error; 508 int async; 509 int used_syncer; 510 511 simple_lock(&mountlist_slock); 512 vfs_unbusy(mp); 513 used_syncer = (mp->mnt_syncer != NULL); 514 515 /* 516 * XXX Syncer must be frozen when we get here. This should really 517 * be done on a per-mountpoint basis, but especially the softdep 518 * code possibly called from the syncer doens't exactly work on a 519 * per-mountpoint basis, so the softdep code would become a maze 520 * of vfs_busy() calls. 521 * 522 * The caller of dounmount() must acquire syncer_lock because 523 * the syncer itself acquires locks in syncer_lock -> vfs_busy 524 * order, and we must preserve that order to avoid deadlock. 525 * 526 * So, if the file system did not use the syncer, now is 527 * the time to release the syncer_lock. 528 */ 529 if (used_syncer == 0) 530 lockmgr(&syncer_lock, LK_RELEASE, NULL); 531 532 mp->mnt_iflag |= IMNT_UNMOUNT; 533 mp->mnt_unmounter = l; 534 lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock); 535 vn_start_write(NULL, &mp, V_WAIT); 536 537 if (mp->mnt_flag & MNT_EXPUBLIC) 538 vfs_setpublicfs(NULL, NULL, NULL); 539 async = mp->mnt_flag & MNT_ASYNC; 540 mp->mnt_flag &= ~MNT_ASYNC; 541 cache_purgevfs(mp); /* remove cache entries for this file sys */ 542 if (mp->mnt_syncer != NULL) 543 vfs_deallocate_syncvnode(mp); 544 error = 0; 545 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 546 #if NFSS > 0 547 error = fss_umount_hook(mp, (flags & MNT_FORCE)); 548 #endif 549 if (error == 0) 550 error = VFS_SYNC(mp, MNT_WAIT, l->l_proc->p_ucred, l); 551 } 552 if (error == 0 || (flags & MNT_FORCE)) 553 error = VFS_UNMOUNT(mp, flags, l); 554 vn_finished_write(mp, 0); 555 simple_lock(&mountlist_slock); 556 if (error) { 557 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 558 (void) vfs_allocate_syncvnode(mp); 559 mp->mnt_iflag &= ~IMNT_UNMOUNT; 560 mp->mnt_unmounter = NULL; 561 mp->mnt_flag |= async; 562 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE, 563 &mountlist_slock); 564 if (used_syncer) 565 lockmgr(&syncer_lock, LK_RELEASE, NULL); 566 simple_lock(&mp->mnt_slock); 567 while (mp->mnt_wcnt > 0) { 568 wakeup(mp); 569 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1", 570 0, &mp->mnt_slock); 571 } 572 simple_unlock(&mp->mnt_slock); 573 return (error); 574 } 575 CIRCLEQ_REMOVE(&mountlist, mp, mnt_list); 576 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) { 577 coveredvp->v_mountedhere = NULL; 578 vrele(coveredvp); 579 } 580 mp->mnt_op->vfs_refcount--; 581 if (LIST_FIRST(&mp->mnt_vnodelist) != NULL) 582 panic("unmount: dangling vnode"); 583 mp->mnt_iflag |= IMNT_GONE; 584 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock); 585 if (used_syncer) 586 lockmgr(&syncer_lock, LK_RELEASE, NULL); 587 simple_lock(&mp->mnt_slock); 588 while (mp->mnt_wcnt > 0) { 589 wakeup(mp); 590 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0, &mp->mnt_slock); 591 } 592 simple_unlock(&mp->mnt_slock); 593 free(mp, M_MOUNT); 594 return (0); 595 } 596 597 /* 598 * Sync each mounted filesystem. 599 */ 600 #ifdef DEBUG 601 int syncprt = 0; 602 struct ctldebug debug0 = { "syncprt", &syncprt }; 603 #endif 604 605 /* ARGSUSED */ 606 int 607 sys_sync(l, v, retval) 608 struct lwp *l; 609 void *v; 610 register_t *retval; 611 { 612 struct mount *mp, *nmp; 613 int asyncflag; 614 struct proc *p = l == NULL ? &proc0 : l->l_proc; 615 616 simple_lock(&mountlist_slock); 617 for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) { 618 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 619 nmp = mp->mnt_list.cqe_prev; 620 continue; 621 } 622 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 623 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 624 asyncflag = mp->mnt_flag & MNT_ASYNC; 625 mp->mnt_flag &= ~MNT_ASYNC; 626 VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, l); 627 if (asyncflag) 628 mp->mnt_flag |= MNT_ASYNC; 629 vn_finished_write(mp, 0); 630 } 631 simple_lock(&mountlist_slock); 632 nmp = mp->mnt_list.cqe_prev; 633 vfs_unbusy(mp); 634 635 } 636 simple_unlock(&mountlist_slock); 637 #ifdef DEBUG 638 if (syncprt) 639 vfs_bufstats(); 640 #endif /* DEBUG */ 641 return (0); 642 } 643 644 /* 645 * Change filesystem quotas. 646 */ 647 /* ARGSUSED */ 648 int 649 sys_quotactl(l, v, retval) 650 struct lwp *l; 651 void *v; 652 register_t *retval; 653 { 654 struct sys_quotactl_args /* { 655 syscallarg(const char *) path; 656 syscallarg(int) cmd; 657 syscallarg(int) uid; 658 syscallarg(caddr_t) arg; 659 } */ *uap = v; 660 struct mount *mp; 661 int error; 662 struct nameidata nd; 663 664 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 665 if ((error = namei(&nd)) != 0) 666 return (error); 667 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 668 vrele(nd.ni_vp); 669 if (error) 670 return (error); 671 error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid), 672 SCARG(uap, arg), l); 673 vn_finished_write(mp, 0); 674 return (error); 675 } 676 677 int 678 dostatvfs(struct mount *mp, struct statvfs *sp, struct lwp *l, int flags, 679 int root) 680 { 681 struct cwdinfo *cwdi = l->l_proc->p_cwdi; 682 int error = 0; 683 684 /* 685 * If MNT_NOWAIT or MNT_LAZY is specified, do not 686 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY 687 * overrides MNT_NOWAIT. 688 */ 689 if (flags == MNT_NOWAIT || flags == MNT_LAZY || 690 (flags != MNT_WAIT && flags != 0)) { 691 memcpy(sp, &mp->mnt_stat, sizeof(*sp)); 692 goto done; 693 } 694 695 /* Get the filesystem stats now */ 696 memset(sp, 0, sizeof(*sp)); 697 if ((error = VFS_STATVFS(mp, sp, l)) != 0) { 698 return error; 699 } 700 701 if (cwdi->cwdi_rdir == NULL) 702 (void)memcpy(&mp->mnt_stat, sp, sizeof(mp->mnt_stat)); 703 done: 704 if (cwdi->cwdi_rdir != NULL) { 705 size_t len; 706 char *bp; 707 char *path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 708 if (!path) 709 return ENOMEM; 710 711 bp = path + MAXPATHLEN; 712 *--bp = '\0'; 713 error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, path, 714 MAXPATHLEN / 2, 0, l); 715 if (error) { 716 free(path, M_TEMP); 717 return error; 718 } 719 len = strlen(bp); 720 /* 721 * for mount points that are below our root, we can see 722 * them, so we fix up the pathname and return them. The 723 * rest we cannot see, so we don't allow viewing the 724 * data. 725 */ 726 if (strncmp(bp, sp->f_mntonname, len) == 0) { 727 strlcpy(sp->f_mntonname, &sp->f_mntonname[len], 728 sizeof(sp->f_mntonname)); 729 if (sp->f_mntonname[0] == '\0') 730 (void)strlcpy(sp->f_mntonname, "/", 731 sizeof(sp->f_mntonname)); 732 } else { 733 if (root) 734 (void)strlcpy(sp->f_mntonname, "/", 735 sizeof(sp->f_mntonname)); 736 else 737 error = EPERM; 738 } 739 free(path, M_TEMP); 740 } 741 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 742 return error; 743 } 744 745 /* 746 * Get filesystem statistics. 747 */ 748 /* ARGSUSED */ 749 int 750 sys_statvfs1(l, v, retval) 751 struct lwp *l; 752 void *v; 753 register_t *retval; 754 { 755 struct sys_statvfs1_args /* { 756 syscallarg(const char *) path; 757 syscallarg(struct statvfs *) buf; 758 syscallarg(int) flags; 759 } */ *uap = v; 760 struct mount *mp; 761 struct statvfs sbuf; 762 int error; 763 struct nameidata nd; 764 765 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 766 if ((error = namei(&nd)) != 0) 767 return error; 768 mp = nd.ni_vp->v_mount; 769 vrele(nd.ni_vp); 770 if ((error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 1)) != 0) 771 return error; 772 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 773 } 774 775 /* 776 * Get filesystem statistics. 777 */ 778 /* ARGSUSED */ 779 int 780 sys_fstatvfs1(l, v, retval) 781 struct lwp *l; 782 void *v; 783 register_t *retval; 784 { 785 struct sys_fstatvfs1_args /* { 786 syscallarg(int) fd; 787 syscallarg(struct statvfs *) buf; 788 syscallarg(int) flags; 789 } */ *uap = v; 790 struct proc *p = l->l_proc; 791 struct file *fp; 792 struct mount *mp; 793 struct statvfs sbuf; 794 int error; 795 796 /* getvnode() will use the descriptor for us */ 797 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 798 return (error); 799 mp = ((struct vnode *)fp->f_data)->v_mount; 800 if ((error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 1)) != 0) 801 goto out; 802 error = copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 803 out: 804 FILE_UNUSE(fp, l); 805 return error; 806 } 807 808 809 /* 810 * Get statistics on all filesystems. 811 */ 812 int 813 sys_getvfsstat(l, v, retval) 814 struct lwp *l; 815 void *v; 816 register_t *retval; 817 { 818 struct sys_getvfsstat_args /* { 819 syscallarg(struct statvfs *) buf; 820 syscallarg(size_t) bufsize; 821 syscallarg(int) flags; 822 } */ *uap = v; 823 int root = 0; 824 struct proc *p = l->l_proc; 825 struct mount *mp, *nmp; 826 struct statvfs sbuf; 827 struct statvfs *sfsp; 828 size_t count, maxcount; 829 int error = 0; 830 831 maxcount = SCARG(uap, bufsize) / sizeof(struct statvfs); 832 sfsp = SCARG(uap, buf); 833 simple_lock(&mountlist_slock); 834 count = 0; 835 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 836 mp = nmp) { 837 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 838 nmp = CIRCLEQ_NEXT(mp, mnt_list); 839 continue; 840 } 841 if (sfsp && count < maxcount) { 842 error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 0); 843 if (error) { 844 simple_lock(&mountlist_slock); 845 nmp = CIRCLEQ_NEXT(mp, mnt_list); 846 vfs_unbusy(mp); 847 continue; 848 } 849 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 850 if (error) { 851 vfs_unbusy(mp); 852 return (error); 853 } 854 sfsp++; 855 root |= strcmp(sbuf.f_mntonname, "/") == 0; 856 } 857 count++; 858 simple_lock(&mountlist_slock); 859 nmp = CIRCLEQ_NEXT(mp, mnt_list); 860 vfs_unbusy(mp); 861 } 862 simple_unlock(&mountlist_slock); 863 if (root == 0 && p->p_cwdi->cwdi_rdir) { 864 /* 865 * fake a root entry 866 */ 867 if ((error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, &sbuf, l, 868 SCARG(uap, flags), 1)) != 0) 869 return error; 870 if (sfsp) 871 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 872 count++; 873 } 874 if (sfsp && count > maxcount) 875 *retval = maxcount; 876 else 877 *retval = count; 878 return error; 879 } 880 881 /* 882 * Change current working directory to a given file descriptor. 883 */ 884 /* ARGSUSED */ 885 int 886 sys_fchdir(l, v, retval) 887 struct lwp *l; 888 void *v; 889 register_t *retval; 890 { 891 struct sys_fchdir_args /* { 892 syscallarg(int) fd; 893 } */ *uap = v; 894 struct proc *p = l->l_proc; 895 struct filedesc *fdp = p->p_fd; 896 struct cwdinfo *cwdi = p->p_cwdi; 897 struct vnode *vp, *tdp; 898 struct mount *mp; 899 struct file *fp; 900 int error; 901 902 /* getvnode() will use the descriptor for us */ 903 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 904 return (error); 905 vp = (struct vnode *)fp->f_data; 906 907 VREF(vp); 908 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 909 if (vp->v_type != VDIR) 910 error = ENOTDIR; 911 else 912 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, l); 913 while (!error && (mp = vp->v_mountedhere) != NULL) { 914 if (vfs_busy(mp, 0, 0)) 915 continue; 916 error = VFS_ROOT(mp, &tdp); 917 vfs_unbusy(mp); 918 if (error) 919 break; 920 vput(vp); 921 vp = tdp; 922 } 923 if (error) { 924 vput(vp); 925 goto out; 926 } 927 VOP_UNLOCK(vp, 0); 928 929 /* 930 * Disallow changing to a directory not under the process's 931 * current root directory (if there is one). 932 */ 933 if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, l)) { 934 vrele(vp); 935 error = EPERM; /* operation not permitted */ 936 goto out; 937 } 938 939 vrele(cwdi->cwdi_cdir); 940 cwdi->cwdi_cdir = vp; 941 out: 942 FILE_UNUSE(fp, l); 943 return (error); 944 } 945 946 /* 947 * Change this process's notion of the root directory to a given file descriptor. 948 */ 949 950 int 951 sys_fchroot(l, v, retval) 952 struct lwp *l; 953 void *v; 954 register_t *retval; 955 { 956 struct sys_fchroot_args *uap = v; 957 struct proc *p = l->l_proc; 958 struct filedesc *fdp = p->p_fd; 959 struct cwdinfo *cwdi = p->p_cwdi; 960 struct vnode *vp; 961 struct file *fp; 962 int error; 963 964 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 965 return error; 966 /* getvnode() will use the descriptor for us */ 967 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 968 return error; 969 vp = (struct vnode *) fp->f_data; 970 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 971 if (vp->v_type != VDIR) 972 error = ENOTDIR; 973 else 974 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, l); 975 VOP_UNLOCK(vp, 0); 976 if (error) 977 goto out; 978 VREF(vp); 979 980 /* 981 * Prevent escaping from chroot by putting the root under 982 * the working directory. Silently chdir to / if we aren't 983 * already there. 984 */ 985 if (!vn_isunder(cwdi->cwdi_cdir, vp, l)) { 986 /* 987 * XXX would be more failsafe to change directory to a 988 * deadfs node here instead 989 */ 990 vrele(cwdi->cwdi_cdir); 991 VREF(vp); 992 cwdi->cwdi_cdir = vp; 993 } 994 995 if (cwdi->cwdi_rdir != NULL) 996 vrele(cwdi->cwdi_rdir); 997 cwdi->cwdi_rdir = vp; 998 out: 999 FILE_UNUSE(fp, l); 1000 return (error); 1001 } 1002 1003 1004 1005 /* 1006 * Change current working directory (``.''). 1007 */ 1008 /* ARGSUSED */ 1009 int 1010 sys_chdir(l, v, retval) 1011 struct lwp *l; 1012 void *v; 1013 register_t *retval; 1014 { 1015 struct sys_chdir_args /* { 1016 syscallarg(const char *) path; 1017 } */ *uap = v; 1018 struct proc *p = l->l_proc; 1019 struct cwdinfo *cwdi = p->p_cwdi; 1020 int error; 1021 struct nameidata nd; 1022 1023 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1024 SCARG(uap, path), l); 1025 if ((error = change_dir(&nd, l)) != 0) 1026 return (error); 1027 vrele(cwdi->cwdi_cdir); 1028 cwdi->cwdi_cdir = nd.ni_vp; 1029 return (0); 1030 } 1031 1032 /* 1033 * Change notion of root (``/'') directory. 1034 */ 1035 /* ARGSUSED */ 1036 int 1037 sys_chroot(l, v, retval) 1038 struct lwp *l; 1039 void *v; 1040 register_t *retval; 1041 { 1042 struct sys_chroot_args /* { 1043 syscallarg(const char *) path; 1044 } */ *uap = v; 1045 struct proc *p = l->l_proc; 1046 struct cwdinfo *cwdi = p->p_cwdi; 1047 struct vnode *vp; 1048 int error; 1049 struct nameidata nd; 1050 1051 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1052 return (error); 1053 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1054 SCARG(uap, path), l); 1055 if ((error = change_dir(&nd, l)) != 0) 1056 return (error); 1057 if (cwdi->cwdi_rdir != NULL) 1058 vrele(cwdi->cwdi_rdir); 1059 vp = nd.ni_vp; 1060 cwdi->cwdi_rdir = vp; 1061 1062 /* 1063 * Prevent escaping from chroot by putting the root under 1064 * the working directory. Silently chdir to / if we aren't 1065 * already there. 1066 */ 1067 if (!vn_isunder(cwdi->cwdi_cdir, vp, l)) { 1068 /* 1069 * XXX would be more failsafe to change directory to a 1070 * deadfs node here instead 1071 */ 1072 vrele(cwdi->cwdi_cdir); 1073 VREF(vp); 1074 cwdi->cwdi_cdir = vp; 1075 } 1076 1077 return (0); 1078 } 1079 1080 /* 1081 * Common routine for chroot and chdir. 1082 */ 1083 static int 1084 change_dir(ndp, l) 1085 struct nameidata *ndp; 1086 struct lwp *l; 1087 { 1088 struct vnode *vp; 1089 int error; 1090 1091 if ((error = namei(ndp)) != 0) 1092 return (error); 1093 vp = ndp->ni_vp; 1094 if (vp->v_type != VDIR) 1095 error = ENOTDIR; 1096 else 1097 error = VOP_ACCESS(vp, VEXEC, l->l_proc->p_ucred, l); 1098 1099 if (error) 1100 vput(vp); 1101 else 1102 VOP_UNLOCK(vp, 0); 1103 return (error); 1104 } 1105 1106 /* 1107 * Check permissions, allocate an open file structure, 1108 * and call the device open routine if any. 1109 */ 1110 int 1111 sys_open(l, v, retval) 1112 struct lwp *l; 1113 void *v; 1114 register_t *retval; 1115 { 1116 struct sys_open_args /* { 1117 syscallarg(const char *) path; 1118 syscallarg(int) flags; 1119 syscallarg(int) mode; 1120 } */ *uap = v; 1121 struct proc *p = l->l_proc; 1122 struct cwdinfo *cwdi = p->p_cwdi; 1123 struct filedesc *fdp = p->p_fd; 1124 struct file *fp; 1125 struct vnode *vp; 1126 int flags, cmode; 1127 int type, indx, error; 1128 struct flock lf; 1129 struct nameidata nd; 1130 1131 flags = FFLAGS(SCARG(uap, flags)); 1132 if ((flags & (FREAD | FWRITE)) == 0) 1133 return (EINVAL); 1134 /* falloc() will use the file descriptor for us */ 1135 if ((error = falloc(p, &fp, &indx)) != 0) 1136 return (error); 1137 cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT; 1138 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 1139 l->l_dupfd = -indx - 1; /* XXX check for fdopen */ 1140 if ((error = vn_open(&nd, flags, cmode)) != 0) { 1141 FILE_UNUSE(fp, l); 1142 fdp->fd_ofiles[indx] = NULL; 1143 ffree(fp); 1144 if ((error == EDUPFD || error == EMOVEFD) && 1145 l->l_dupfd >= 0 && /* XXX from fdopen */ 1146 (error = 1147 dupfdopen(l, indx, l->l_dupfd, flags, error)) == 0) { 1148 *retval = indx; 1149 return (0); 1150 } 1151 if (error == ERESTART) 1152 error = EINTR; 1153 fdremove(fdp, indx); 1154 return (error); 1155 } 1156 l->l_dupfd = 0; 1157 vp = nd.ni_vp; 1158 fp->f_flag = flags & FMASK; 1159 fp->f_type = DTYPE_VNODE; 1160 fp->f_ops = &vnops; 1161 fp->f_data = vp; 1162 if (flags & (O_EXLOCK | O_SHLOCK)) { 1163 lf.l_whence = SEEK_SET; 1164 lf.l_start = 0; 1165 lf.l_len = 0; 1166 if (flags & O_EXLOCK) 1167 lf.l_type = F_WRLCK; 1168 else 1169 lf.l_type = F_RDLCK; 1170 type = F_FLOCK; 1171 if ((flags & FNONBLOCK) == 0) 1172 type |= F_WAIT; 1173 VOP_UNLOCK(vp, 0); 1174 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1175 if (error) { 1176 (void) vn_close(vp, fp->f_flag, fp->f_cred, l); 1177 FILE_UNUSE(fp, l); 1178 ffree(fp); 1179 fdremove(fdp, indx); 1180 return (error); 1181 } 1182 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1183 fp->f_flag |= FHASLOCK; 1184 } 1185 VOP_UNLOCK(vp, 0); 1186 *retval = indx; 1187 FILE_SET_MATURE(fp); 1188 FILE_UNUSE(fp, l); 1189 return (0); 1190 } 1191 1192 /* 1193 * Get file handle system call 1194 */ 1195 int 1196 sys_getfh(l, v, retval) 1197 struct lwp *l; 1198 void *v; 1199 register_t *retval; 1200 { 1201 struct sys_getfh_args /* { 1202 syscallarg(char *) fname; 1203 syscallarg(fhandle_t *) fhp; 1204 } */ *uap = v; 1205 struct proc *p = l->l_proc; 1206 struct vnode *vp; 1207 fhandle_t fh; 1208 int error; 1209 struct nameidata nd; 1210 1211 /* 1212 * Must be super user 1213 */ 1214 error = suser(p->p_ucred, &p->p_acflag); 1215 if (error) 1216 return (error); 1217 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1218 SCARG(uap, fname), l); 1219 error = namei(&nd); 1220 if (error) 1221 return (error); 1222 vp = nd.ni_vp; 1223 memset(&fh, 0, sizeof(fh)); 1224 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1225 error = VFS_VPTOFH(vp, &fh.fh_fid); 1226 vput(vp); 1227 if (error) 1228 return (error); 1229 error = copyout(&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); 1230 return (error); 1231 } 1232 1233 /* 1234 * Open a file given a file handle. 1235 * 1236 * Check permissions, allocate an open file structure, 1237 * and call the device open routine if any. 1238 */ 1239 int 1240 sys_fhopen(l, v, retval) 1241 struct lwp *l; 1242 void *v; 1243 register_t *retval; 1244 { 1245 struct sys_fhopen_args /* { 1246 syscallarg(const fhandle_t *) fhp; 1247 syscallarg(int) flags; 1248 } */ *uap = v; 1249 struct proc *p = l->l_proc; 1250 struct filedesc *fdp = p->p_fd; 1251 struct file *fp; 1252 struct vnode *vp = NULL; 1253 struct mount *mp; 1254 struct ucred *cred = p->p_ucred; 1255 int flags; 1256 struct file *nfp; 1257 int type, indx, error=0; 1258 struct flock lf; 1259 struct vattr va; 1260 fhandle_t fh; 1261 1262 /* 1263 * Must be super user 1264 */ 1265 if ((error = suser(p->p_ucred, &p->p_acflag))) 1266 return (error); 1267 1268 flags = FFLAGS(SCARG(uap, flags)); 1269 if ((flags & (FREAD | FWRITE)) == 0) 1270 return (EINVAL); 1271 if ((flags & O_CREAT)) 1272 return (EINVAL); 1273 /* falloc() will use the file descriptor for us */ 1274 if ((error = falloc(p, &nfp, &indx)) != 0) 1275 return (error); 1276 fp = nfp; 1277 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1278 goto bad; 1279 1280 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) { 1281 error = ESTALE; 1282 goto bad; 1283 } 1284 1285 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) { 1286 vp = NULL; /* most likely unnecessary sanity for bad: */ 1287 goto bad; 1288 } 1289 1290 /* Now do an effective vn_open */ 1291 1292 if (vp->v_type == VSOCK) { 1293 error = EOPNOTSUPP; 1294 goto bad; 1295 } 1296 if (flags & FREAD) { 1297 if ((error = VOP_ACCESS(vp, VREAD, cred, l)) != 0) 1298 goto bad; 1299 } 1300 if (flags & (FWRITE | O_TRUNC)) { 1301 if (vp->v_type == VDIR) { 1302 error = EISDIR; 1303 goto bad; 1304 } 1305 if ((error = vn_writechk(vp)) != 0 || 1306 (error = VOP_ACCESS(vp, VWRITE, cred, l)) != 0) 1307 goto bad; 1308 } 1309 if (flags & O_TRUNC) { 1310 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 1311 goto bad; 1312 VOP_UNLOCK(vp, 0); /* XXX */ 1313 VOP_LEASE(vp, l, cred, LEASE_WRITE); 1314 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */ 1315 VATTR_NULL(&va); 1316 va.va_size = 0; 1317 error = VOP_SETATTR(vp, &va, cred, l); 1318 vn_finished_write(mp, 0); 1319 if (error) 1320 goto bad; 1321 } 1322 if ((error = VOP_OPEN(vp, flags, cred, l)) != 0) 1323 goto bad; 1324 if (vp->v_type == VREG && 1325 uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) { 1326 error = EIO; 1327 goto bad; 1328 } 1329 if (flags & FWRITE) 1330 vp->v_writecount++; 1331 1332 /* done with modified vn_open, now finish what sys_open does. */ 1333 1334 fp->f_flag = flags & FMASK; 1335 fp->f_type = DTYPE_VNODE; 1336 fp->f_ops = &vnops; 1337 fp->f_data = vp; 1338 if (flags & (O_EXLOCK | O_SHLOCK)) { 1339 lf.l_whence = SEEK_SET; 1340 lf.l_start = 0; 1341 lf.l_len = 0; 1342 if (flags & O_EXLOCK) 1343 lf.l_type = F_WRLCK; 1344 else 1345 lf.l_type = F_RDLCK; 1346 type = F_FLOCK; 1347 if ((flags & FNONBLOCK) == 0) 1348 type |= F_WAIT; 1349 VOP_UNLOCK(vp, 0); 1350 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1351 if (error) { 1352 (void) vn_close(vp, fp->f_flag, fp->f_cred, l); 1353 FILE_UNUSE(fp, l); 1354 ffree(fp); 1355 fdremove(fdp, indx); 1356 return (error); 1357 } 1358 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1359 fp->f_flag |= FHASLOCK; 1360 } 1361 VOP_UNLOCK(vp, 0); 1362 *retval = indx; 1363 FILE_SET_MATURE(fp); 1364 FILE_UNUSE(fp, l); 1365 return (0); 1366 1367 bad: 1368 FILE_UNUSE(fp, l); 1369 ffree(fp); 1370 fdremove(fdp, indx); 1371 if (vp != NULL) 1372 vput(vp); 1373 return (error); 1374 } 1375 1376 /* ARGSUSED */ 1377 int 1378 sys_fhstat(l, v, retval) 1379 struct lwp *l; 1380 void *v; 1381 register_t *retval; 1382 { 1383 struct sys_fhstat_args /* { 1384 syscallarg(const fhandle_t *) fhp; 1385 syscallarg(struct stat *) sb; 1386 } */ *uap = v; 1387 struct proc *p = l->l_proc; 1388 struct stat sb; 1389 int error; 1390 fhandle_t fh; 1391 struct mount *mp; 1392 struct vnode *vp; 1393 1394 /* 1395 * Must be super user 1396 */ 1397 if ((error = suser(p->p_ucred, &p->p_acflag))) 1398 return (error); 1399 1400 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1401 return (error); 1402 1403 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1404 return (ESTALE); 1405 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1406 return (error); 1407 error = vn_stat(vp, &sb, l); 1408 vput(vp); 1409 if (error) 1410 return (error); 1411 error = copyout(&sb, SCARG(uap, sb), sizeof(sb)); 1412 return (error); 1413 } 1414 1415 /* ARGSUSED */ 1416 int 1417 sys_fhstatvfs1(l, v, retval) 1418 struct lwp *l; 1419 void *v; 1420 register_t *retval; 1421 { 1422 struct sys_fhstatvfs1_args /* 1423 syscallarg(const fhandle_t *) fhp; 1424 syscallarg(struct statvfs *) buf; 1425 syscallarg(int) flags; 1426 } */ *uap = v; 1427 struct proc *p = l->l_proc; 1428 struct statvfs sbuf; 1429 fhandle_t fh; 1430 struct mount *mp; 1431 struct vnode *vp; 1432 int error; 1433 1434 /* 1435 * Must be super user 1436 */ 1437 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1438 return error; 1439 1440 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1441 return error; 1442 1443 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1444 return ESTALE; 1445 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1446 return error; 1447 1448 mp = vp->v_mount; 1449 if ((error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 1)) != 0) { 1450 vput(vp); 1451 return error; 1452 } 1453 vput(vp); 1454 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 1455 } 1456 1457 /* 1458 * Create a special file. 1459 */ 1460 /* ARGSUSED */ 1461 int 1462 sys_mknod(l, v, retval) 1463 struct lwp *l; 1464 void *v; 1465 register_t *retval; 1466 { 1467 struct sys_mknod_args /* { 1468 syscallarg(const char *) path; 1469 syscallarg(int) mode; 1470 syscallarg(int) dev; 1471 } */ *uap = v; 1472 struct proc *p = l->l_proc; 1473 struct vnode *vp; 1474 struct mount *mp; 1475 struct vattr vattr; 1476 int error; 1477 int whiteout = 0; 1478 struct nameidata nd; 1479 1480 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1481 return (error); 1482 restart: 1483 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), l); 1484 if ((error = namei(&nd)) != 0) 1485 return (error); 1486 vp = nd.ni_vp; 1487 if (vp != NULL) 1488 error = EEXIST; 1489 else { 1490 VATTR_NULL(&vattr); 1491 vattr.va_mode = 1492 (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1493 vattr.va_rdev = SCARG(uap, dev); 1494 whiteout = 0; 1495 1496 switch (SCARG(uap, mode) & S_IFMT) { 1497 case S_IFMT: /* used by badsect to flag bad sectors */ 1498 vattr.va_type = VBAD; 1499 break; 1500 case S_IFCHR: 1501 vattr.va_type = VCHR; 1502 break; 1503 case S_IFBLK: 1504 vattr.va_type = VBLK; 1505 break; 1506 case S_IFWHT: 1507 whiteout = 1; 1508 break; 1509 default: 1510 error = EINVAL; 1511 break; 1512 } 1513 } 1514 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1515 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1516 if (nd.ni_dvp == vp) 1517 vrele(nd.ni_dvp); 1518 else 1519 vput(nd.ni_dvp); 1520 if (vp) 1521 vrele(vp); 1522 if ((error = vn_start_write(NULL, &mp, 1523 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1524 return (error); 1525 goto restart; 1526 } 1527 if (!error) { 1528 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 1529 if (whiteout) { 1530 error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); 1531 if (error) 1532 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1533 vput(nd.ni_dvp); 1534 } else { 1535 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, 1536 &nd.ni_cnd, &vattr); 1537 if (error == 0) 1538 vput(nd.ni_vp); 1539 } 1540 } else { 1541 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1542 if (nd.ni_dvp == vp) 1543 vrele(nd.ni_dvp); 1544 else 1545 vput(nd.ni_dvp); 1546 if (vp) 1547 vrele(vp); 1548 } 1549 vn_finished_write(mp, 0); 1550 return (error); 1551 } 1552 1553 /* 1554 * Create a named pipe. 1555 */ 1556 /* ARGSUSED */ 1557 int 1558 sys_mkfifo(l, v, retval) 1559 struct lwp *l; 1560 void *v; 1561 register_t *retval; 1562 { 1563 struct sys_mkfifo_args /* { 1564 syscallarg(const char *) path; 1565 syscallarg(int) mode; 1566 } */ *uap = v; 1567 struct proc *p = l->l_proc; 1568 struct mount *mp; 1569 struct vattr vattr; 1570 int error; 1571 struct nameidata nd; 1572 1573 restart: 1574 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), l); 1575 if ((error = namei(&nd)) != 0) 1576 return (error); 1577 if (nd.ni_vp != NULL) { 1578 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1579 if (nd.ni_dvp == nd.ni_vp) 1580 vrele(nd.ni_dvp); 1581 else 1582 vput(nd.ni_dvp); 1583 vrele(nd.ni_vp); 1584 return (EEXIST); 1585 } 1586 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1587 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1588 if (nd.ni_dvp == nd.ni_vp) 1589 vrele(nd.ni_dvp); 1590 else 1591 vput(nd.ni_dvp); 1592 if (nd.ni_vp) 1593 vrele(nd.ni_vp); 1594 if ((error = vn_start_write(NULL, &mp, 1595 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1596 return (error); 1597 goto restart; 1598 } 1599 VATTR_NULL(&vattr); 1600 vattr.va_type = VFIFO; 1601 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1602 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 1603 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 1604 if (error == 0) 1605 vput(nd.ni_vp); 1606 vn_finished_write(mp, 0); 1607 return (error); 1608 } 1609 1610 /* 1611 * Make a hard file link. 1612 */ 1613 /* ARGSUSED */ 1614 int 1615 sys_link(l, v, retval) 1616 struct lwp *l; 1617 void *v; 1618 register_t *retval; 1619 { 1620 struct sys_link_args /* { 1621 syscallarg(const char *) path; 1622 syscallarg(const char *) link; 1623 } */ *uap = v; 1624 struct proc *p = l->l_proc; 1625 struct vnode *vp; 1626 struct mount *mp; 1627 struct nameidata nd; 1628 int error; 1629 1630 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 1631 if ((error = namei(&nd)) != 0) 1632 return (error); 1633 vp = nd.ni_vp; 1634 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 1635 vrele(vp); 1636 return (error); 1637 } 1638 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), l); 1639 if ((error = namei(&nd)) != 0) 1640 goto out; 1641 if (nd.ni_vp) { 1642 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1643 if (nd.ni_dvp == nd.ni_vp) 1644 vrele(nd.ni_dvp); 1645 else 1646 vput(nd.ni_dvp); 1647 vrele(nd.ni_vp); 1648 error = EEXIST; 1649 goto out; 1650 } 1651 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 1652 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 1653 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 1654 out: 1655 vrele(vp); 1656 vn_finished_write(mp, 0); 1657 return (error); 1658 } 1659 1660 /* 1661 * Make a symbolic link. 1662 */ 1663 /* ARGSUSED */ 1664 int 1665 sys_symlink(l, v, retval) 1666 struct lwp *l; 1667 void *v; 1668 register_t *retval; 1669 { 1670 struct sys_symlink_args /* { 1671 syscallarg(const char *) path; 1672 syscallarg(const char *) link; 1673 } */ *uap = v; 1674 struct proc *p = l->l_proc; 1675 struct mount *mp; 1676 struct vattr vattr; 1677 char *path; 1678 int error; 1679 struct nameidata nd; 1680 1681 path = PNBUF_GET(); 1682 error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL); 1683 if (error) 1684 goto out; 1685 restart: 1686 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), l); 1687 if ((error = namei(&nd)) != 0) 1688 goto out; 1689 if (nd.ni_vp) { 1690 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1691 if (nd.ni_dvp == nd.ni_vp) 1692 vrele(nd.ni_dvp); 1693 else 1694 vput(nd.ni_dvp); 1695 vrele(nd.ni_vp); 1696 error = EEXIST; 1697 goto out; 1698 } 1699 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1700 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1701 if (nd.ni_dvp == nd.ni_vp) 1702 vrele(nd.ni_dvp); 1703 else 1704 vput(nd.ni_dvp); 1705 if ((error = vn_start_write(NULL, &mp, 1706 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1707 return (error); 1708 goto restart; 1709 } 1710 VATTR_NULL(&vattr); 1711 vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask; 1712 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 1713 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); 1714 if (error == 0) 1715 vput(nd.ni_vp); 1716 vn_finished_write(mp, 0); 1717 out: 1718 PNBUF_PUT(path); 1719 return (error); 1720 } 1721 1722 /* 1723 * Delete a whiteout from the filesystem. 1724 */ 1725 /* ARGSUSED */ 1726 int 1727 sys_undelete(l, v, retval) 1728 struct lwp *l; 1729 void *v; 1730 register_t *retval; 1731 { 1732 struct sys_undelete_args /* { 1733 syscallarg(const char *) path; 1734 } */ *uap = v; 1735 struct proc *p = l->l_proc; 1736 int error; 1737 struct mount *mp; 1738 struct nameidata nd; 1739 1740 restart: 1741 NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE, 1742 SCARG(uap, path), l); 1743 error = namei(&nd); 1744 if (error) 1745 return (error); 1746 1747 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { 1748 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1749 if (nd.ni_dvp == nd.ni_vp) 1750 vrele(nd.ni_dvp); 1751 else 1752 vput(nd.ni_dvp); 1753 if (nd.ni_vp) 1754 vrele(nd.ni_vp); 1755 return (EEXIST); 1756 } 1757 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1758 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1759 if (nd.ni_dvp == nd.ni_vp) 1760 vrele(nd.ni_dvp); 1761 else 1762 vput(nd.ni_dvp); 1763 if ((error = vn_start_write(NULL, &mp, 1764 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1765 return (error); 1766 goto restart; 1767 } 1768 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 1769 if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0) 1770 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1771 vput(nd.ni_dvp); 1772 vn_finished_write(mp, 0); 1773 return (error); 1774 } 1775 1776 /* 1777 * Delete a name from the filesystem. 1778 */ 1779 /* ARGSUSED */ 1780 int 1781 sys_unlink(l, v, retval) 1782 struct lwp *l; 1783 void *v; 1784 register_t *retval; 1785 { 1786 struct sys_unlink_args /* { 1787 syscallarg(const char *) path; 1788 } */ *uap = v; 1789 struct proc *p = l->l_proc; 1790 struct mount *mp; 1791 struct vnode *vp; 1792 int error; 1793 struct nameidata nd; 1794 1795 restart: 1796 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 1797 SCARG(uap, path), l); 1798 if ((error = namei(&nd)) != 0) 1799 return (error); 1800 vp = nd.ni_vp; 1801 1802 /* 1803 * The root of a mounted filesystem cannot be deleted. 1804 */ 1805 if (vp->v_flag & VROOT) { 1806 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1807 if (nd.ni_dvp == vp) 1808 vrele(nd.ni_dvp); 1809 else 1810 vput(nd.ni_dvp); 1811 vput(vp); 1812 error = EBUSY; 1813 goto out; 1814 } 1815 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1816 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1817 if (nd.ni_dvp == vp) 1818 vrele(nd.ni_dvp); 1819 else 1820 vput(nd.ni_dvp); 1821 vput(vp); 1822 if ((error = vn_start_write(NULL, &mp, 1823 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1824 return (error); 1825 goto restart; 1826 } 1827 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 1828 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 1829 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1830 vn_finished_write(mp, 0); 1831 out: 1832 return (error); 1833 } 1834 1835 /* 1836 * Reposition read/write file offset. 1837 */ 1838 int 1839 sys_lseek(l, v, retval) 1840 struct lwp *l; 1841 void *v; 1842 register_t *retval; 1843 { 1844 struct sys_lseek_args /* { 1845 syscallarg(int) fd; 1846 syscallarg(int) pad; 1847 syscallarg(off_t) offset; 1848 syscallarg(int) whence; 1849 } */ *uap = v; 1850 struct proc *p = l->l_proc; 1851 struct ucred *cred = p->p_ucred; 1852 struct filedesc *fdp = p->p_fd; 1853 struct file *fp; 1854 struct vnode *vp; 1855 struct vattr vattr; 1856 off_t newoff; 1857 int error; 1858 1859 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1860 return (EBADF); 1861 1862 FILE_USE(fp); 1863 1864 vp = (struct vnode *)fp->f_data; 1865 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1866 error = ESPIPE; 1867 goto out; 1868 } 1869 1870 switch (SCARG(uap, whence)) { 1871 case SEEK_CUR: 1872 newoff = fp->f_offset + SCARG(uap, offset); 1873 break; 1874 case SEEK_END: 1875 error = VOP_GETATTR(vp, &vattr, cred, l); 1876 if (error) 1877 goto out; 1878 newoff = SCARG(uap, offset) + vattr.va_size; 1879 break; 1880 case SEEK_SET: 1881 newoff = SCARG(uap, offset); 1882 break; 1883 default: 1884 error = EINVAL; 1885 goto out; 1886 } 1887 if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0) 1888 goto out; 1889 1890 *(off_t *)retval = fp->f_offset = newoff; 1891 out: 1892 FILE_UNUSE(fp, l); 1893 return (error); 1894 } 1895 1896 /* 1897 * Positional read system call. 1898 */ 1899 int 1900 sys_pread(l, v, retval) 1901 struct lwp *l; 1902 void *v; 1903 register_t *retval; 1904 { 1905 struct sys_pread_args /* { 1906 syscallarg(int) fd; 1907 syscallarg(void *) buf; 1908 syscallarg(size_t) nbyte; 1909 syscallarg(off_t) offset; 1910 } */ *uap = v; 1911 struct proc *p = l->l_proc; 1912 struct filedesc *fdp = p->p_fd; 1913 struct file *fp; 1914 struct vnode *vp; 1915 off_t offset; 1916 int error, fd = SCARG(uap, fd); 1917 1918 if ((fp = fd_getfile(fdp, fd)) == NULL) 1919 return (EBADF); 1920 1921 if ((fp->f_flag & FREAD) == 0) { 1922 simple_unlock(&fp->f_slock); 1923 return (EBADF); 1924 } 1925 1926 FILE_USE(fp); 1927 1928 vp = (struct vnode *)fp->f_data; 1929 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1930 error = ESPIPE; 1931 goto out; 1932 } 1933 1934 offset = SCARG(uap, offset); 1935 1936 /* 1937 * XXX This works because no file systems actually 1938 * XXX take any action on the seek operation. 1939 */ 1940 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1941 goto out; 1942 1943 /* dofileread() will unuse the descriptor for us */ 1944 return (dofileread(l, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 1945 &offset, 0, retval)); 1946 1947 out: 1948 FILE_UNUSE(fp, l); 1949 return (error); 1950 } 1951 1952 /* 1953 * Positional scatter read system call. 1954 */ 1955 int 1956 sys_preadv(l, v, retval) 1957 struct lwp *l; 1958 void *v; 1959 register_t *retval; 1960 { 1961 struct sys_preadv_args /* { 1962 syscallarg(int) fd; 1963 syscallarg(const struct iovec *) iovp; 1964 syscallarg(int) iovcnt; 1965 syscallarg(off_t) offset; 1966 } */ *uap = v; 1967 struct proc *p = l->l_proc; 1968 struct filedesc *fdp = p->p_fd; 1969 struct file *fp; 1970 struct vnode *vp; 1971 off_t offset; 1972 int error, fd = SCARG(uap, fd); 1973 1974 if ((fp = fd_getfile(fdp, fd)) == NULL) 1975 return (EBADF); 1976 1977 if ((fp->f_flag & FREAD) == 0) { 1978 simple_unlock(&fp->f_slock); 1979 return (EBADF); 1980 } 1981 1982 FILE_USE(fp); 1983 1984 vp = (struct vnode *)fp->f_data; 1985 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1986 error = ESPIPE; 1987 goto out; 1988 } 1989 1990 offset = SCARG(uap, offset); 1991 1992 /* 1993 * XXX This works because no file systems actually 1994 * XXX take any action on the seek operation. 1995 */ 1996 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1997 goto out; 1998 1999 /* dofilereadv() will unuse the descriptor for us */ 2000 return (dofilereadv(l, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2001 &offset, 0, retval)); 2002 2003 out: 2004 FILE_UNUSE(fp, l); 2005 return (error); 2006 } 2007 2008 /* 2009 * Positional write system call. 2010 */ 2011 int 2012 sys_pwrite(l, v, retval) 2013 struct lwp *l; 2014 void *v; 2015 register_t *retval; 2016 { 2017 struct sys_pwrite_args /* { 2018 syscallarg(int) fd; 2019 syscallarg(const void *) buf; 2020 syscallarg(size_t) nbyte; 2021 syscallarg(off_t) offset; 2022 } */ *uap = v; 2023 struct proc *p = l->l_proc; 2024 struct filedesc *fdp = p->p_fd; 2025 struct file *fp; 2026 struct vnode *vp; 2027 off_t offset; 2028 int error, fd = SCARG(uap, fd); 2029 2030 if ((fp = fd_getfile(fdp, fd)) == NULL) 2031 return (EBADF); 2032 2033 if ((fp->f_flag & FWRITE) == 0) { 2034 simple_unlock(&fp->f_slock); 2035 return (EBADF); 2036 } 2037 2038 FILE_USE(fp); 2039 2040 vp = (struct vnode *)fp->f_data; 2041 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2042 error = ESPIPE; 2043 goto out; 2044 } 2045 2046 offset = SCARG(uap, offset); 2047 2048 /* 2049 * XXX This works because no file systems actually 2050 * XXX take any action on the seek operation. 2051 */ 2052 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2053 goto out; 2054 2055 /* dofilewrite() will unuse the descriptor for us */ 2056 return (dofilewrite(l, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 2057 &offset, 0, retval)); 2058 2059 out: 2060 FILE_UNUSE(fp, l); 2061 return (error); 2062 } 2063 2064 /* 2065 * Positional gather write system call. 2066 */ 2067 int 2068 sys_pwritev(l, v, retval) 2069 struct lwp *l; 2070 void *v; 2071 register_t *retval; 2072 { 2073 struct sys_pwritev_args /* { 2074 syscallarg(int) fd; 2075 syscallarg(const struct iovec *) iovp; 2076 syscallarg(int) iovcnt; 2077 syscallarg(off_t) offset; 2078 } */ *uap = v; 2079 struct proc *p = l->l_proc; 2080 struct filedesc *fdp = p->p_fd; 2081 struct file *fp; 2082 struct vnode *vp; 2083 off_t offset; 2084 int error, fd = SCARG(uap, fd); 2085 2086 if ((fp = fd_getfile(fdp, fd)) == NULL) 2087 return (EBADF); 2088 2089 if ((fp->f_flag & FWRITE) == 0) { 2090 simple_unlock(&fp->f_slock); 2091 return (EBADF); 2092 } 2093 2094 FILE_USE(fp); 2095 2096 vp = (struct vnode *)fp->f_data; 2097 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2098 error = ESPIPE; 2099 goto out; 2100 } 2101 2102 offset = SCARG(uap, offset); 2103 2104 /* 2105 * XXX This works because no file systems actually 2106 * XXX take any action on the seek operation. 2107 */ 2108 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2109 goto out; 2110 2111 /* dofilewritev() will unuse the descriptor for us */ 2112 return (dofilewritev(l, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2113 &offset, 0, retval)); 2114 2115 out: 2116 FILE_UNUSE(fp, l); 2117 return (error); 2118 } 2119 2120 /* 2121 * Check access permissions. 2122 */ 2123 int 2124 sys_access(l, v, retval) 2125 struct lwp *l; 2126 void *v; 2127 register_t *retval; 2128 { 2129 struct sys_access_args /* { 2130 syscallarg(const char *) path; 2131 syscallarg(int) flags; 2132 } */ *uap = v; 2133 struct proc *p = l->l_proc; 2134 struct ucred *cred; 2135 struct vnode *vp; 2136 int error, flags; 2137 struct nameidata nd; 2138 2139 cred = crdup(p->p_ucred); 2140 cred->cr_uid = p->p_cred->p_ruid; 2141 cred->cr_gid = p->p_cred->p_rgid; 2142 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2143 SCARG(uap, path), l); 2144 /* Override default credentials */ 2145 nd.ni_cnd.cn_cred = cred; 2146 if ((error = namei(&nd)) != 0) 2147 goto out; 2148 vp = nd.ni_vp; 2149 2150 /* Flags == 0 means only check for existence. */ 2151 if (SCARG(uap, flags)) { 2152 flags = 0; 2153 if (SCARG(uap, flags) & R_OK) 2154 flags |= VREAD; 2155 if (SCARG(uap, flags) & W_OK) 2156 flags |= VWRITE; 2157 if (SCARG(uap, flags) & X_OK) 2158 flags |= VEXEC; 2159 2160 error = VOP_ACCESS(vp, flags, cred, l); 2161 if (!error && (flags & VWRITE)) 2162 error = vn_writechk(vp); 2163 } 2164 vput(vp); 2165 out: 2166 crfree(cred); 2167 return (error); 2168 } 2169 2170 /* 2171 * Get file status; this version follows links. 2172 */ 2173 /* ARGSUSED */ 2174 int 2175 sys___stat13(l, v, retval) 2176 struct lwp *l; 2177 void *v; 2178 register_t *retval; 2179 { 2180 struct sys___stat13_args /* { 2181 syscallarg(const char *) path; 2182 syscallarg(struct stat *) ub; 2183 } */ *uap = v; 2184 struct stat sb; 2185 int error; 2186 struct nameidata nd; 2187 2188 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2189 SCARG(uap, path), l); 2190 if ((error = namei(&nd)) != 0) 2191 return (error); 2192 error = vn_stat(nd.ni_vp, &sb, l); 2193 vput(nd.ni_vp); 2194 if (error) 2195 return (error); 2196 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2197 return (error); 2198 } 2199 2200 /* 2201 * Get file status; this version does not follow links. 2202 */ 2203 /* ARGSUSED */ 2204 int 2205 sys___lstat13(l, v, retval) 2206 struct lwp *l; 2207 void *v; 2208 register_t *retval; 2209 { 2210 struct sys___lstat13_args /* { 2211 syscallarg(const char *) path; 2212 syscallarg(struct stat *) ub; 2213 } */ *uap = v; 2214 struct stat sb; 2215 int error; 2216 struct nameidata nd; 2217 2218 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2219 SCARG(uap, path), l); 2220 if ((error = namei(&nd)) != 0) 2221 return (error); 2222 error = vn_stat(nd.ni_vp, &sb, l); 2223 vput(nd.ni_vp); 2224 if (error) 2225 return (error); 2226 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2227 return (error); 2228 } 2229 2230 /* 2231 * Get configurable pathname variables. 2232 */ 2233 /* ARGSUSED */ 2234 int 2235 sys_pathconf(l, v, retval) 2236 struct lwp *l; 2237 void *v; 2238 register_t *retval; 2239 { 2240 struct sys_pathconf_args /* { 2241 syscallarg(const char *) path; 2242 syscallarg(int) name; 2243 } */ *uap = v; 2244 int error; 2245 struct nameidata nd; 2246 2247 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2248 SCARG(uap, path), l); 2249 if ((error = namei(&nd)) != 0) 2250 return (error); 2251 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval); 2252 vput(nd.ni_vp); 2253 return (error); 2254 } 2255 2256 /* 2257 * Return target name of a symbolic link. 2258 */ 2259 /* ARGSUSED */ 2260 int 2261 sys_readlink(l, v, retval) 2262 struct lwp *l; 2263 void *v; 2264 register_t *retval; 2265 { 2266 struct sys_readlink_args /* { 2267 syscallarg(const char *) path; 2268 syscallarg(char *) buf; 2269 syscallarg(size_t) count; 2270 } */ *uap = v; 2271 struct proc *p = l->l_proc; 2272 struct vnode *vp; 2273 struct iovec aiov; 2274 struct uio auio; 2275 int error; 2276 struct nameidata nd; 2277 2278 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2279 SCARG(uap, path), l); 2280 if ((error = namei(&nd)) != 0) 2281 return (error); 2282 vp = nd.ni_vp; 2283 if (vp->v_type != VLNK) 2284 error = EINVAL; 2285 else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) || 2286 (error = VOP_ACCESS(vp, VREAD, p->p_ucred, l)) == 0) { 2287 aiov.iov_base = SCARG(uap, buf); 2288 aiov.iov_len = SCARG(uap, count); 2289 auio.uio_iov = &aiov; 2290 auio.uio_iovcnt = 1; 2291 auio.uio_offset = 0; 2292 auio.uio_rw = UIO_READ; 2293 auio.uio_segflg = UIO_USERSPACE; 2294 auio.uio_lwp = l; 2295 auio.uio_resid = SCARG(uap, count); 2296 error = VOP_READLINK(vp, &auio, p->p_ucred); 2297 } 2298 vput(vp); 2299 *retval = SCARG(uap, count) - auio.uio_resid; 2300 return (error); 2301 } 2302 2303 /* 2304 * Change flags of a file given a path name. 2305 */ 2306 /* ARGSUSED */ 2307 int 2308 sys_chflags(l, v, retval) 2309 struct lwp *l; 2310 void *v; 2311 register_t *retval; 2312 { 2313 struct sys_chflags_args /* { 2314 syscallarg(const char *) path; 2315 syscallarg(u_long) flags; 2316 } */ *uap = v; 2317 struct vnode *vp; 2318 int error; 2319 struct nameidata nd; 2320 2321 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2322 if ((error = namei(&nd)) != 0) 2323 return (error); 2324 vp = nd.ni_vp; 2325 error = change_flags(vp, SCARG(uap, flags), l); 2326 vput(vp); 2327 return (error); 2328 } 2329 2330 /* 2331 * Change flags of a file given a file descriptor. 2332 */ 2333 /* ARGSUSED */ 2334 int 2335 sys_fchflags(l, v, retval) 2336 struct lwp *l; 2337 void *v; 2338 register_t *retval; 2339 { 2340 struct sys_fchflags_args /* { 2341 syscallarg(int) fd; 2342 syscallarg(u_long) flags; 2343 } */ *uap = v; 2344 struct proc *p = l->l_proc; 2345 struct vnode *vp; 2346 struct file *fp; 2347 int error; 2348 2349 /* getvnode() will use the descriptor for us */ 2350 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2351 return (error); 2352 vp = (struct vnode *)fp->f_data; 2353 error = change_flags(vp, SCARG(uap, flags), l); 2354 VOP_UNLOCK(vp, 0); 2355 FILE_UNUSE(fp, l); 2356 return (error); 2357 } 2358 2359 /* 2360 * Change flags of a file given a path name; this version does 2361 * not follow links. 2362 */ 2363 int 2364 sys_lchflags(l, v, retval) 2365 struct lwp *l; 2366 void *v; 2367 register_t *retval; 2368 { 2369 struct sys_lchflags_args /* { 2370 syscallarg(const char *) path; 2371 syscallarg(u_long) flags; 2372 } */ *uap = v; 2373 struct vnode *vp; 2374 int error; 2375 struct nameidata nd; 2376 2377 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2378 if ((error = namei(&nd)) != 0) 2379 return (error); 2380 vp = nd.ni_vp; 2381 error = change_flags(vp, SCARG(uap, flags), l); 2382 vput(vp); 2383 return (error); 2384 } 2385 2386 /* 2387 * Common routine to change flags of a file. 2388 */ 2389 int 2390 change_flags(vp, flags, l) 2391 struct vnode *vp; 2392 u_long flags; 2393 struct lwp *l; 2394 { 2395 struct proc *p = l->l_proc; 2396 struct mount *mp; 2397 struct vattr vattr; 2398 int error; 2399 2400 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2401 return (error); 2402 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 2403 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2404 /* 2405 * Non-superusers cannot change the flags on devices, even if they 2406 * own them. 2407 */ 2408 if (suser(p->p_ucred, &p->p_acflag) != 0) { 2409 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, l)) != 0) 2410 goto out; 2411 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 2412 error = EINVAL; 2413 goto out; 2414 } 2415 } 2416 VATTR_NULL(&vattr); 2417 vattr.va_flags = flags; 2418 error = VOP_SETATTR(vp, &vattr, p->p_ucred, l); 2419 out: 2420 vn_finished_write(mp, 0); 2421 return (error); 2422 } 2423 2424 /* 2425 * Change mode of a file given path name; this version follows links. 2426 */ 2427 /* ARGSUSED */ 2428 int 2429 sys_chmod(l, v, retval) 2430 struct lwp *l; 2431 void *v; 2432 register_t *retval; 2433 { 2434 struct sys_chmod_args /* { 2435 syscallarg(const char *) path; 2436 syscallarg(int) mode; 2437 } */ *uap = v; 2438 int error; 2439 struct nameidata nd; 2440 2441 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2442 if ((error = namei(&nd)) != 0) 2443 return (error); 2444 2445 error = change_mode(nd.ni_vp, SCARG(uap, mode), l); 2446 2447 vrele(nd.ni_vp); 2448 return (error); 2449 } 2450 2451 /* 2452 * Change mode of a file given a file descriptor. 2453 */ 2454 /* ARGSUSED */ 2455 int 2456 sys_fchmod(l, v, retval) 2457 struct lwp *l; 2458 void *v; 2459 register_t *retval; 2460 { 2461 struct sys_fchmod_args /* { 2462 syscallarg(int) fd; 2463 syscallarg(int) mode; 2464 } */ *uap = v; 2465 struct proc *p = l->l_proc; 2466 struct file *fp; 2467 int error; 2468 2469 /* getvnode() will use the descriptor for us */ 2470 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2471 return (error); 2472 2473 error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), l); 2474 FILE_UNUSE(fp, l); 2475 return (error); 2476 } 2477 2478 /* 2479 * Change mode of a file given path name; this version does not follow links. 2480 */ 2481 /* ARGSUSED */ 2482 int 2483 sys_lchmod(l, v, retval) 2484 struct lwp *l; 2485 void *v; 2486 register_t *retval; 2487 { 2488 struct sys_lchmod_args /* { 2489 syscallarg(const char *) path; 2490 syscallarg(int) mode; 2491 } */ *uap = v; 2492 int error; 2493 struct nameidata nd; 2494 2495 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2496 if ((error = namei(&nd)) != 0) 2497 return (error); 2498 2499 error = change_mode(nd.ni_vp, SCARG(uap, mode), l); 2500 2501 vrele(nd.ni_vp); 2502 return (error); 2503 } 2504 2505 /* 2506 * Common routine to set mode given a vnode. 2507 */ 2508 static int 2509 change_mode(vp, mode, l) 2510 struct vnode *vp; 2511 int mode; 2512 struct lwp *l; 2513 { 2514 struct proc *p = l->l_proc; 2515 struct mount *mp; 2516 struct vattr vattr; 2517 int error; 2518 2519 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2520 return (error); 2521 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 2522 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2523 VATTR_NULL(&vattr); 2524 vattr.va_mode = mode & ALLPERMS; 2525 error = VOP_SETATTR(vp, &vattr, p->p_ucred, l); 2526 VOP_UNLOCK(vp, 0); 2527 vn_finished_write(mp, 0); 2528 return (error); 2529 } 2530 2531 /* 2532 * Set ownership given a path name; this version follows links. 2533 */ 2534 /* ARGSUSED */ 2535 int 2536 sys_chown(l, v, retval) 2537 struct lwp *l; 2538 void *v; 2539 register_t *retval; 2540 { 2541 struct sys_chown_args /* { 2542 syscallarg(const char *) path; 2543 syscallarg(uid_t) uid; 2544 syscallarg(gid_t) gid; 2545 } */ *uap = v; 2546 int error; 2547 struct nameidata nd; 2548 2549 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2550 if ((error = namei(&nd)) != 0) 2551 return (error); 2552 2553 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), l, 0); 2554 2555 vrele(nd.ni_vp); 2556 return (error); 2557 } 2558 2559 /* 2560 * Set ownership given a path name; this version follows links. 2561 * Provides POSIX semantics. 2562 */ 2563 /* ARGSUSED */ 2564 int 2565 sys___posix_chown(l, v, retval) 2566 struct lwp *l; 2567 void *v; 2568 register_t *retval; 2569 { 2570 struct sys_chown_args /* { 2571 syscallarg(const char *) path; 2572 syscallarg(uid_t) uid; 2573 syscallarg(gid_t) gid; 2574 } */ *uap = v; 2575 int error; 2576 struct nameidata nd; 2577 2578 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2579 if ((error = namei(&nd)) != 0) 2580 return (error); 2581 2582 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), l, 1); 2583 2584 vrele(nd.ni_vp); 2585 return (error); 2586 } 2587 2588 /* 2589 * Set ownership given a file descriptor. 2590 */ 2591 /* ARGSUSED */ 2592 int 2593 sys_fchown(l, v, retval) 2594 struct lwp *l; 2595 void *v; 2596 register_t *retval; 2597 { 2598 struct sys_fchown_args /* { 2599 syscallarg(int) fd; 2600 syscallarg(uid_t) uid; 2601 syscallarg(gid_t) gid; 2602 } */ *uap = v; 2603 struct proc *p = l->l_proc; 2604 int error; 2605 struct file *fp; 2606 2607 /* getvnode() will use the descriptor for us */ 2608 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2609 return (error); 2610 2611 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2612 SCARG(uap, gid), l, 0); 2613 FILE_UNUSE(fp, l); 2614 return (error); 2615 } 2616 2617 /* 2618 * Set ownership given a file descriptor, providing POSIX/XPG semantics. 2619 */ 2620 /* ARGSUSED */ 2621 int 2622 sys___posix_fchown(l, v, retval) 2623 struct lwp *l; 2624 void *v; 2625 register_t *retval; 2626 { 2627 struct sys_fchown_args /* { 2628 syscallarg(int) fd; 2629 syscallarg(uid_t) uid; 2630 syscallarg(gid_t) gid; 2631 } */ *uap = v; 2632 struct proc *p = l->l_proc; 2633 int error; 2634 struct file *fp; 2635 2636 /* getvnode() will use the descriptor for us */ 2637 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2638 return (error); 2639 2640 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2641 SCARG(uap, gid), l, 1); 2642 FILE_UNUSE(fp, l); 2643 return (error); 2644 } 2645 2646 /* 2647 * Set ownership given a path name; this version does not follow links. 2648 */ 2649 /* ARGSUSED */ 2650 int 2651 sys_lchown(l, v, retval) 2652 struct lwp *l; 2653 void *v; 2654 register_t *retval; 2655 { 2656 struct sys_lchown_args /* { 2657 syscallarg(const char *) path; 2658 syscallarg(uid_t) uid; 2659 syscallarg(gid_t) gid; 2660 } */ *uap = v; 2661 int error; 2662 struct nameidata nd; 2663 2664 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2665 if ((error = namei(&nd)) != 0) 2666 return (error); 2667 2668 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), l, 0); 2669 2670 vrele(nd.ni_vp); 2671 return (error); 2672 } 2673 2674 /* 2675 * Set ownership given a path name; this version does not follow links. 2676 * Provides POSIX/XPG semantics. 2677 */ 2678 /* ARGSUSED */ 2679 int 2680 sys___posix_lchown(l, v, retval) 2681 struct lwp *l; 2682 void *v; 2683 register_t *retval; 2684 { 2685 struct sys_lchown_args /* { 2686 syscallarg(const char *) path; 2687 syscallarg(uid_t) uid; 2688 syscallarg(gid_t) gid; 2689 } */ *uap = v; 2690 int error; 2691 struct nameidata nd; 2692 2693 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2694 if ((error = namei(&nd)) != 0) 2695 return (error); 2696 2697 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), l, 1); 2698 2699 vrele(nd.ni_vp); 2700 return (error); 2701 } 2702 2703 /* 2704 * Common routine to set ownership given a vnode. 2705 */ 2706 static int 2707 change_owner(vp, uid, gid, l, posix_semantics) 2708 struct vnode *vp; 2709 uid_t uid; 2710 gid_t gid; 2711 struct lwp *l; 2712 int posix_semantics; 2713 { 2714 struct proc *p = l->l_proc; 2715 struct mount *mp; 2716 struct vattr vattr; 2717 mode_t newmode; 2718 int error; 2719 2720 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2721 return (error); 2722 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 2723 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2724 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, l)) != 0) 2725 goto out; 2726 2727 #define CHANGED(x) ((int)(x) != -1) 2728 newmode = vattr.va_mode; 2729 if (posix_semantics) { 2730 /* 2731 * POSIX/XPG semantics: if the caller is not the super-user, 2732 * clear set-user-id and set-group-id bits. Both POSIX and 2733 * the XPG consider the behaviour for calls by the super-user 2734 * implementation-defined; we leave the set-user-id and set- 2735 * group-id settings intact in that case. 2736 */ 2737 if (suser(p->p_ucred, NULL) != 0) 2738 newmode &= ~(S_ISUID | S_ISGID); 2739 } else { 2740 /* 2741 * NetBSD semantics: when changing owner and/or group, 2742 * clear the respective bit(s). 2743 */ 2744 if (CHANGED(uid)) 2745 newmode &= ~S_ISUID; 2746 if (CHANGED(gid)) 2747 newmode &= ~S_ISGID; 2748 } 2749 /* Update va_mode iff altered. */ 2750 if (vattr.va_mode == newmode) 2751 newmode = VNOVAL; 2752 2753 VATTR_NULL(&vattr); 2754 vattr.va_uid = CHANGED(uid) ? uid : (uid_t)VNOVAL; 2755 vattr.va_gid = CHANGED(gid) ? gid : (gid_t)VNOVAL; 2756 vattr.va_mode = newmode; 2757 error = VOP_SETATTR(vp, &vattr, p->p_ucred, l); 2758 #undef CHANGED 2759 2760 out: 2761 VOP_UNLOCK(vp, 0); 2762 vn_finished_write(mp, 0); 2763 return (error); 2764 } 2765 2766 /* 2767 * Set the access and modification times given a path name; this 2768 * version follows links. 2769 */ 2770 /* ARGSUSED */ 2771 int 2772 sys_utimes(l, v, retval) 2773 struct lwp *l; 2774 void *v; 2775 register_t *retval; 2776 { 2777 struct sys_utimes_args /* { 2778 syscallarg(const char *) path; 2779 syscallarg(const struct timeval *) tptr; 2780 } */ *uap = v; 2781 int error; 2782 struct nameidata nd; 2783 2784 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2785 if ((error = namei(&nd)) != 0) 2786 return (error); 2787 2788 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), l); 2789 2790 vrele(nd.ni_vp); 2791 return (error); 2792 } 2793 2794 /* 2795 * Set the access and modification times given a file descriptor. 2796 */ 2797 /* ARGSUSED */ 2798 int 2799 sys_futimes(l, v, retval) 2800 struct lwp *l; 2801 void *v; 2802 register_t *retval; 2803 { 2804 struct sys_futimes_args /* { 2805 syscallarg(int) fd; 2806 syscallarg(const struct timeval *) tptr; 2807 } */ *uap = v; 2808 struct proc *p = l->l_proc; 2809 int error; 2810 struct file *fp; 2811 2812 /* getvnode() will use the descriptor for us */ 2813 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2814 return (error); 2815 2816 error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), l); 2817 FILE_UNUSE(fp, l); 2818 return (error); 2819 } 2820 2821 /* 2822 * Set the access and modification times given a path name; this 2823 * version does not follow links. 2824 */ 2825 /* ARGSUSED */ 2826 int 2827 sys_lutimes(l, v, retval) 2828 struct lwp *l; 2829 void *v; 2830 register_t *retval; 2831 { 2832 struct sys_lutimes_args /* { 2833 syscallarg(const char *) path; 2834 syscallarg(const struct timeval *) tptr; 2835 } */ *uap = v; 2836 int error; 2837 struct nameidata nd; 2838 2839 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2840 if ((error = namei(&nd)) != 0) 2841 return (error); 2842 2843 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), l); 2844 2845 vrele(nd.ni_vp); 2846 return (error); 2847 } 2848 2849 /* 2850 * Common routine to set access and modification times given a vnode. 2851 */ 2852 static int 2853 change_utimes(vp, tptr, l) 2854 struct vnode *vp; 2855 const struct timeval *tptr; 2856 struct lwp *l; 2857 { 2858 struct proc *p = l->l_proc; 2859 struct timeval tv[2]; 2860 struct mount *mp; 2861 struct vattr vattr; 2862 int error; 2863 2864 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2865 return (error); 2866 VATTR_NULL(&vattr); 2867 if (tptr == NULL) { 2868 microtime(&tv[0]); 2869 tv[1] = tv[0]; 2870 vattr.va_vaflags |= VA_UTIMES_NULL; 2871 } else { 2872 error = copyin(tptr, tv, sizeof(tv)); 2873 if (error) 2874 goto out; 2875 } 2876 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 2877 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2878 vattr.va_atime.tv_sec = tv[0].tv_sec; 2879 vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000; 2880 vattr.va_mtime.tv_sec = tv[1].tv_sec; 2881 vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000; 2882 error = VOP_SETATTR(vp, &vattr, p->p_ucred, l); 2883 VOP_UNLOCK(vp, 0); 2884 out: 2885 vn_finished_write(mp, 0); 2886 return (error); 2887 } 2888 2889 /* 2890 * Truncate a file given its path name. 2891 */ 2892 /* ARGSUSED */ 2893 int 2894 sys_truncate(l, v, retval) 2895 struct lwp *l; 2896 void *v; 2897 register_t *retval; 2898 { 2899 struct sys_truncate_args /* { 2900 syscallarg(const char *) path; 2901 syscallarg(int) pad; 2902 syscallarg(off_t) length; 2903 } */ *uap = v; 2904 struct proc *p = l->l_proc; 2905 struct vnode *vp; 2906 struct mount *mp; 2907 struct vattr vattr; 2908 int error; 2909 struct nameidata nd; 2910 2911 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 2912 if ((error = namei(&nd)) != 0) 2913 return (error); 2914 vp = nd.ni_vp; 2915 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2916 vrele(vp); 2917 return (error); 2918 } 2919 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 2920 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2921 if (vp->v_type == VDIR) 2922 error = EISDIR; 2923 else if ((error = vn_writechk(vp)) == 0 && 2924 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, l)) == 0) { 2925 VATTR_NULL(&vattr); 2926 vattr.va_size = SCARG(uap, length); 2927 error = VOP_SETATTR(vp, &vattr, p->p_ucred, l); 2928 } 2929 vput(vp); 2930 vn_finished_write(mp, 0); 2931 return (error); 2932 } 2933 2934 /* 2935 * Truncate a file given a file descriptor. 2936 */ 2937 /* ARGSUSED */ 2938 int 2939 sys_ftruncate(l, v, retval) 2940 struct lwp *l; 2941 void *v; 2942 register_t *retval; 2943 { 2944 struct sys_ftruncate_args /* { 2945 syscallarg(int) fd; 2946 syscallarg(int) pad; 2947 syscallarg(off_t) length; 2948 } */ *uap = v; 2949 struct proc *p = l->l_proc; 2950 struct mount *mp; 2951 struct vattr vattr; 2952 struct vnode *vp; 2953 struct file *fp; 2954 int error; 2955 2956 /* getvnode() will use the descriptor for us */ 2957 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2958 return (error); 2959 if ((fp->f_flag & FWRITE) == 0) { 2960 error = EINVAL; 2961 goto out; 2962 } 2963 vp = (struct vnode *)fp->f_data; 2964 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2965 FILE_UNUSE(fp, l); 2966 return (error); 2967 } 2968 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 2969 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2970 if (vp->v_type == VDIR) 2971 error = EISDIR; 2972 else if ((error = vn_writechk(vp)) == 0) { 2973 VATTR_NULL(&vattr); 2974 vattr.va_size = SCARG(uap, length); 2975 error = VOP_SETATTR(vp, &vattr, fp->f_cred, l); 2976 } 2977 VOP_UNLOCK(vp, 0); 2978 vn_finished_write(mp, 0); 2979 out: 2980 FILE_UNUSE(fp, l); 2981 return (error); 2982 } 2983 2984 /* 2985 * Sync an open file. 2986 */ 2987 /* ARGSUSED */ 2988 int 2989 sys_fsync(l, v, retval) 2990 struct lwp *l; 2991 void *v; 2992 register_t *retval; 2993 { 2994 struct sys_fsync_args /* { 2995 syscallarg(int) fd; 2996 } */ *uap = v; 2997 struct proc *p = l->l_proc; 2998 struct vnode *vp; 2999 struct mount *mp; 3000 struct file *fp; 3001 int error; 3002 3003 /* getvnode() will use the descriptor for us */ 3004 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3005 return (error); 3006 vp = (struct vnode *)fp->f_data; 3007 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3008 FILE_UNUSE(fp, l); 3009 return (error); 3010 } 3011 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3012 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, l); 3013 if (error == 0 && bioops.io_fsync != NULL && 3014 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3015 (*bioops.io_fsync)(vp); 3016 VOP_UNLOCK(vp, 0); 3017 vn_finished_write(mp, 0); 3018 FILE_UNUSE(fp, l); 3019 return (error); 3020 } 3021 3022 /* 3023 * Sync a range of file data. API modeled after that found in AIX. 3024 * 3025 * FDATASYNC indicates that we need only save enough metadata to be able 3026 * to re-read the written data. Note we duplicate AIX's requirement that 3027 * the file be open for writing. 3028 */ 3029 /* ARGSUSED */ 3030 int 3031 sys_fsync_range(l, v, retval) 3032 struct lwp *l; 3033 void *v; 3034 register_t *retval; 3035 { 3036 struct sys_fsync_range_args /* { 3037 syscallarg(int) fd; 3038 syscallarg(int) flags; 3039 syscallarg(off_t) start; 3040 syscallarg(int) length; 3041 } */ *uap = v; 3042 struct proc *p = l->l_proc; 3043 struct vnode *vp; 3044 struct file *fp; 3045 int flags, nflags; 3046 off_t s, e, len; 3047 int error; 3048 3049 /* getvnode() will use the descriptor for us */ 3050 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3051 return (error); 3052 3053 if ((fp->f_flag & FWRITE) == 0) { 3054 FILE_UNUSE(fp, l); 3055 return (EBADF); 3056 } 3057 3058 flags = SCARG(uap, flags); 3059 if (((flags & (FDATASYNC | FFILESYNC)) == 0) || 3060 ((~flags & (FDATASYNC | FFILESYNC)) == 0)) { 3061 return (EINVAL); 3062 } 3063 /* Now set up the flags for value(s) to pass to VOP_FSYNC() */ 3064 if (flags & FDATASYNC) 3065 nflags = FSYNC_DATAONLY | FSYNC_WAIT; 3066 else 3067 nflags = FSYNC_WAIT; 3068 3069 len = SCARG(uap, length); 3070 /* If length == 0, we do the whole file, and s = l = 0 will do that */ 3071 if (len) { 3072 s = SCARG(uap, start); 3073 e = s + len; 3074 if (e < s) { 3075 FILE_UNUSE(fp, l); 3076 return (EINVAL); 3077 } 3078 } else { 3079 e = 0; 3080 s = 0; 3081 } 3082 3083 vp = (struct vnode *)fp->f_data; 3084 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3085 error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, l); 3086 3087 if (error == 0 && bioops.io_fsync != NULL && 3088 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3089 (*bioops.io_fsync)(vp); 3090 3091 VOP_UNLOCK(vp, 0); 3092 FILE_UNUSE(fp, l); 3093 return (error); 3094 } 3095 3096 /* 3097 * Sync the data of an open file. 3098 */ 3099 /* ARGSUSED */ 3100 int 3101 sys_fdatasync(l, v, retval) 3102 struct lwp *l; 3103 void *v; 3104 register_t *retval; 3105 { 3106 struct sys_fdatasync_args /* { 3107 syscallarg(int) fd; 3108 } */ *uap = v; 3109 struct proc *p = l->l_proc; 3110 struct vnode *vp; 3111 struct file *fp; 3112 int error; 3113 3114 /* getvnode() will use the descriptor for us */ 3115 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3116 return (error); 3117 if ((fp->f_flag & FWRITE) == 0) { 3118 FILE_UNUSE(fp, l); 3119 return (EBADF); 3120 } 3121 vp = (struct vnode *)fp->f_data; 3122 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3123 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, l); 3124 VOP_UNLOCK(vp, 0); 3125 FILE_UNUSE(fp, l); 3126 return (error); 3127 } 3128 3129 /* 3130 * Rename files, (standard) BSD semantics frontend. 3131 */ 3132 /* ARGSUSED */ 3133 int 3134 sys_rename(l, v, retval) 3135 struct lwp *l; 3136 void *v; 3137 register_t *retval; 3138 { 3139 struct sys_rename_args /* { 3140 syscallarg(const char *) from; 3141 syscallarg(const char *) to; 3142 } */ *uap = v; 3143 3144 return (rename_files(SCARG(uap, from), SCARG(uap, to), l, 0)); 3145 } 3146 3147 /* 3148 * Rename files, POSIX semantics frontend. 3149 */ 3150 /* ARGSUSED */ 3151 int 3152 sys___posix_rename(l, v, retval) 3153 struct lwp *l; 3154 void *v; 3155 register_t *retval; 3156 { 3157 struct sys___posix_rename_args /* { 3158 syscallarg(const char *) from; 3159 syscallarg(const char *) to; 3160 } */ *uap = v; 3161 3162 return (rename_files(SCARG(uap, from), SCARG(uap, to), l, 1)); 3163 } 3164 3165 /* 3166 * Rename files. Source and destination must either both be directories, 3167 * or both not be directories. If target is a directory, it must be empty. 3168 * If `from' and `to' refer to the same object, the value of the `retain' 3169 * argument is used to determine whether `from' will be 3170 * 3171 * (retain == 0) deleted unless `from' and `to' refer to the same 3172 * object in the file system's name space (BSD). 3173 * (retain == 1) always retained (POSIX). 3174 */ 3175 static int 3176 rename_files(from, to, l, retain) 3177 const char *from, *to; 3178 struct lwp *l; 3179 int retain; 3180 { 3181 struct mount *mp = NULL; 3182 struct vnode *tvp, *fvp, *tdvp; 3183 struct nameidata fromnd, tond; 3184 struct proc *p; 3185 int error; 3186 3187 NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, 3188 from, l); 3189 if ((error = namei(&fromnd)) != 0) 3190 return (error); 3191 fvp = fromnd.ni_vp; 3192 error = vn_start_write(fvp, &mp, V_WAIT | V_PCATCH); 3193 if (error != 0) { 3194 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3195 vrele(fromnd.ni_dvp); 3196 vrele(fvp); 3197 if (fromnd.ni_startdir) 3198 vrele(fromnd.ni_startdir); 3199 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3200 return (error); 3201 } 3202 NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | 3203 (fvp->v_type == VDIR ? CREATEDIR : 0), UIO_USERSPACE, to, l); 3204 if ((error = namei(&tond)) != 0) { 3205 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3206 vrele(fromnd.ni_dvp); 3207 vrele(fvp); 3208 goto out1; 3209 } 3210 tdvp = tond.ni_dvp; 3211 tvp = tond.ni_vp; 3212 3213 if (tvp != NULL) { 3214 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 3215 error = ENOTDIR; 3216 goto out; 3217 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 3218 error = EISDIR; 3219 goto out; 3220 } 3221 } 3222 3223 if (fvp == tdvp) 3224 error = EINVAL; 3225 3226 /* 3227 * Source and destination refer to the same object. 3228 */ 3229 if (fvp == tvp) { 3230 if (retain) 3231 error = -1; 3232 else if (fromnd.ni_dvp == tdvp && 3233 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 3234 !memcmp(fromnd.ni_cnd.cn_nameptr, 3235 tond.ni_cnd.cn_nameptr, 3236 fromnd.ni_cnd.cn_namelen)) 3237 error = -1; 3238 } 3239 3240 out: 3241 p = l->l_proc; 3242 if (!error) { 3243 VOP_LEASE(tdvp, l, p->p_ucred, LEASE_WRITE); 3244 if (fromnd.ni_dvp != tdvp) 3245 VOP_LEASE(fromnd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 3246 if (tvp) { 3247 VOP_LEASE(tvp, l, p->p_ucred, LEASE_WRITE); 3248 } 3249 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 3250 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 3251 } else { 3252 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 3253 if (tdvp == tvp) 3254 vrele(tdvp); 3255 else 3256 vput(tdvp); 3257 if (tvp) 3258 vput(tvp); 3259 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3260 vrele(fromnd.ni_dvp); 3261 vrele(fvp); 3262 } 3263 vrele(tond.ni_startdir); 3264 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 3265 out1: 3266 vn_finished_write(mp, 0); 3267 if (fromnd.ni_startdir) 3268 vrele(fromnd.ni_startdir); 3269 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3270 return (error == -1 ? 0 : error); 3271 } 3272 3273 /* 3274 * Make a directory file. 3275 */ 3276 /* ARGSUSED */ 3277 int 3278 sys_mkdir(l, v, retval) 3279 struct lwp *l; 3280 void *v; 3281 register_t *retval; 3282 { 3283 struct sys_mkdir_args /* { 3284 syscallarg(const char *) path; 3285 syscallarg(int) mode; 3286 } */ *uap = v; 3287 struct proc *p = l->l_proc; 3288 struct mount *mp; 3289 struct vnode *vp; 3290 struct vattr vattr; 3291 int error; 3292 struct nameidata nd; 3293 3294 restart: 3295 NDINIT(&nd, CREATE, LOCKPARENT | CREATEDIR, UIO_USERSPACE, 3296 SCARG(uap, path), l); 3297 if ((error = namei(&nd)) != 0) 3298 return (error); 3299 vp = nd.ni_vp; 3300 if (vp != NULL) { 3301 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3302 if (nd.ni_dvp == vp) 3303 vrele(nd.ni_dvp); 3304 else 3305 vput(nd.ni_dvp); 3306 vrele(vp); 3307 return (EEXIST); 3308 } 3309 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3310 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3311 if (nd.ni_dvp == vp) 3312 vrele(nd.ni_dvp); 3313 else 3314 vput(nd.ni_dvp); 3315 if ((error = vn_start_write(NULL, &mp, 3316 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3317 return (error); 3318 goto restart; 3319 } 3320 VATTR_NULL(&vattr); 3321 vattr.va_type = VDIR; 3322 vattr.va_mode = 3323 (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask; 3324 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 3325 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 3326 if (!error) 3327 vput(nd.ni_vp); 3328 vn_finished_write(mp, 0); 3329 return (error); 3330 } 3331 3332 /* 3333 * Remove a directory file. 3334 */ 3335 /* ARGSUSED */ 3336 int 3337 sys_rmdir(l, v, retval) 3338 struct lwp *l; 3339 void *v; 3340 register_t *retval; 3341 { 3342 struct sys_rmdir_args /* { 3343 syscallarg(const char *) path; 3344 } */ *uap = v; 3345 struct proc *p = l->l_proc; 3346 struct mount *mp; 3347 struct vnode *vp; 3348 int error; 3349 struct nameidata nd; 3350 3351 restart: 3352 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 3353 SCARG(uap, path), l); 3354 if ((error = namei(&nd)) != 0) 3355 return (error); 3356 vp = nd.ni_vp; 3357 if (vp->v_type != VDIR) { 3358 error = ENOTDIR; 3359 goto out; 3360 } 3361 /* 3362 * No rmdir "." please. 3363 */ 3364 if (nd.ni_dvp == vp) { 3365 error = EINVAL; 3366 goto out; 3367 } 3368 /* 3369 * The root of a mounted filesystem cannot be deleted. 3370 */ 3371 if (vp->v_flag & VROOT) { 3372 error = EBUSY; 3373 goto out; 3374 } 3375 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3376 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3377 if (nd.ni_dvp == vp) 3378 vrele(nd.ni_dvp); 3379 else 3380 vput(nd.ni_dvp); 3381 vput(vp); 3382 if ((error = vn_start_write(NULL, &mp, 3383 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3384 return (error); 3385 goto restart; 3386 } 3387 VOP_LEASE(nd.ni_dvp, l, p->p_ucred, LEASE_WRITE); 3388 VOP_LEASE(vp, l, p->p_ucred, LEASE_WRITE); 3389 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 3390 vn_finished_write(mp, 0); 3391 return (error); 3392 3393 out: 3394 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3395 if (nd.ni_dvp == vp) 3396 vrele(nd.ni_dvp); 3397 else 3398 vput(nd.ni_dvp); 3399 vput(vp); 3400 return (error); 3401 } 3402 3403 /* 3404 * Read a block of directory entries in a file system independent format. 3405 */ 3406 int 3407 sys_getdents(l, v, retval) 3408 struct lwp *l; 3409 void *v; 3410 register_t *retval; 3411 { 3412 struct sys_getdents_args /* { 3413 syscallarg(int) fd; 3414 syscallarg(char *) buf; 3415 syscallarg(size_t) count; 3416 } */ *uap = v; 3417 struct proc *p = l->l_proc; 3418 struct file *fp; 3419 int error, done; 3420 3421 /* getvnode() will use the descriptor for us */ 3422 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3423 return (error); 3424 if ((fp->f_flag & FREAD) == 0) { 3425 error = EBADF; 3426 goto out; 3427 } 3428 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 3429 SCARG(uap, count), &done, l, 0, 0); 3430 #ifdef KTRACE 3431 if (!error && KTRPOINT(p, KTR_GENIO)) { 3432 struct iovec iov; 3433 iov.iov_base = SCARG(uap, buf); 3434 iov.iov_len = done; 3435 ktrgenio(l, SCARG(uap, fd), UIO_READ, &iov, done, 0); 3436 } 3437 #endif 3438 *retval = done; 3439 out: 3440 FILE_UNUSE(fp, l); 3441 return (error); 3442 } 3443 3444 /* 3445 * Set the mode mask for creation of filesystem nodes. 3446 */ 3447 int 3448 sys_umask(l, v, retval) 3449 struct lwp *l; 3450 void *v; 3451 register_t *retval; 3452 { 3453 struct sys_umask_args /* { 3454 syscallarg(mode_t) newmask; 3455 } */ *uap = v; 3456 struct proc *p = l->l_proc; 3457 struct cwdinfo *cwdi; 3458 3459 cwdi = p->p_cwdi; 3460 *retval = cwdi->cwdi_cmask; 3461 cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS; 3462 return (0); 3463 } 3464 3465 /* 3466 * Void all references to file by ripping underlying filesystem 3467 * away from vnode. 3468 */ 3469 /* ARGSUSED */ 3470 int 3471 sys_revoke(l, v, retval) 3472 struct lwp *l; 3473 void *v; 3474 register_t *retval; 3475 { 3476 struct sys_revoke_args /* { 3477 syscallarg(const char *) path; 3478 } */ *uap = v; 3479 struct proc *p = l->l_proc; 3480 struct mount *mp; 3481 struct vnode *vp; 3482 struct vattr vattr; 3483 int error; 3484 struct nameidata nd; 3485 3486 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3487 if ((error = namei(&nd)) != 0) 3488 return (error); 3489 vp = nd.ni_vp; 3490 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, l)) != 0) 3491 goto out; 3492 if (p->p_ucred->cr_uid != vattr.va_uid && 3493 (error = suser(p->p_ucred, &p->p_acflag)) != 0) 3494 goto out; 3495 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 3496 goto out; 3497 if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER))) 3498 VOP_REVOKE(vp, REVOKEALL); 3499 vn_finished_write(mp, 0); 3500 out: 3501 vrele(vp); 3502 return (error); 3503 } 3504 3505 /* 3506 * Convert a user file descriptor to a kernel file entry. 3507 */ 3508 int 3509 getvnode(fdp, fd, fpp) 3510 struct filedesc *fdp; 3511 int fd; 3512 struct file **fpp; 3513 { 3514 struct vnode *vp; 3515 struct file *fp; 3516 3517 if ((fp = fd_getfile(fdp, fd)) == NULL) 3518 return (EBADF); 3519 3520 FILE_USE(fp); 3521 3522 if (fp->f_type != DTYPE_VNODE) { 3523 FILE_UNUSE(fp, NULL); 3524 return (EINVAL); 3525 } 3526 3527 vp = (struct vnode *)fp->f_data; 3528 if (vp->v_type == VBAD) { 3529 FILE_UNUSE(fp, NULL); 3530 return (EBADF); 3531 } 3532 3533 *fpp = fp; 3534 return (0); 3535 } 3536 3537 /* 3538 * Push extended attribute configuration information into the VFS. 3539 * 3540 * NOTE: Not all file systems that support extended attributes will 3541 * require the use of this system call. 3542 */ 3543 int 3544 sys_extattrctl(struct lwp *l, void *v, register_t *retval) 3545 { 3546 struct sys_extattrctl_args /* { 3547 syscallarg(const char *) path; 3548 syscallarg(int) cmd; 3549 syscallarg(const char *) filename; 3550 syscallarg(int) attrnamespace; 3551 syscallarg(const char *) attrname; 3552 } */ *uap = v; 3553 struct vnode *vp; 3554 struct nameidata nd; 3555 struct mount *mp; 3556 char attrname[EXTATTR_MAXNAMELEN]; 3557 int error; 3558 3559 if (SCARG(uap, attrname) != NULL) { 3560 error = copyinstr(SCARG(uap, attrname), attrname, 3561 sizeof(attrname), NULL); 3562 if (error) 3563 return (error); 3564 } 3565 3566 vp = NULL; 3567 if (SCARG(uap, filename) != NULL) { 3568 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 3569 SCARG(uap, filename), l); 3570 error = namei(&nd); 3571 if (error) 3572 return (error); 3573 vp = nd.ni_vp; 3574 } 3575 3576 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3577 error = namei(&nd); 3578 if (error) { 3579 if (vp != NULL) 3580 vput(vp); 3581 return (error); 3582 } 3583 3584 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 3585 if (error) { 3586 if (vp != NULL) 3587 vput(vp); 3588 return (error); 3589 } 3590 3591 error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp, 3592 SCARG(uap, attrnamespace), 3593 SCARG(uap, attrname) != NULL ? attrname : NULL, l); 3594 3595 vn_finished_write(mp, 0); 3596 3597 if (vp != NULL) 3598 vrele(vp); 3599 3600 return (error); 3601 } 3602 3603 /* 3604 * Set a named extended attribute on a file or directory. 3605 */ 3606 static int 3607 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3608 const void *data, size_t nbytes, struct lwp *l, register_t *retval) 3609 { 3610 struct mount *mp; 3611 struct uio auio; 3612 struct iovec aiov; 3613 ssize_t cnt; 3614 int error; 3615 3616 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3617 if (error) 3618 return (error); 3619 VOP_LEASE(vp, l, l->l_proc->p_ucred, LEASE_WRITE); 3620 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3621 3622 aiov.iov_base = (caddr_t) data; /* XXX kills const */ 3623 aiov.iov_len = nbytes; 3624 auio.uio_iov = &aiov; 3625 auio.uio_iovcnt = 1; 3626 auio.uio_offset = 0; 3627 if (nbytes > INT_MAX) { 3628 error = EINVAL; 3629 goto done; 3630 } 3631 auio.uio_resid = nbytes; 3632 auio.uio_rw = UIO_WRITE; 3633 auio.uio_segflg = UIO_USERSPACE; 3634 auio.uio_lwp = l; 3635 cnt = nbytes; 3636 3637 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, 3638 l->l_proc->p_ucred, l); 3639 cnt -= auio.uio_resid; 3640 retval[0] = cnt; 3641 3642 done: 3643 VOP_UNLOCK(vp, 0); 3644 vn_finished_write(mp, 0); 3645 return (error); 3646 } 3647 3648 int 3649 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval) 3650 { 3651 struct sys_extattr_set_fd_args /* { 3652 syscallarg(int) fd; 3653 syscallarg(int) attrnamespace; 3654 syscallarg(const char *) attrname; 3655 syscallarg(const void *) data; 3656 syscallarg(size_t) nbytes; 3657 } */ *uap = v; 3658 struct file *fp; 3659 struct vnode *vp; 3660 char attrname[EXTATTR_MAXNAMELEN]; 3661 int error; 3662 3663 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3664 NULL); 3665 if (error) 3666 return (error); 3667 3668 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 3669 if (error) 3670 return (error); 3671 vp = (struct vnode *) fp->f_data; 3672 3673 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, 3674 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 3675 3676 FILE_UNUSE(fp, l); 3677 return (error); 3678 } 3679 3680 int 3681 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval) 3682 { 3683 struct sys_extattr_set_file_args /* { 3684 syscallarg(const char *) path; 3685 syscallarg(int) attrnamespace; 3686 syscallarg(const char *) attrname; 3687 syscallarg(const void *) data; 3688 syscallarg(size_t) nbytes; 3689 } */ *uap = v; 3690 struct nameidata nd; 3691 char attrname[EXTATTR_MAXNAMELEN]; 3692 int error; 3693 3694 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3695 NULL); 3696 if (error) 3697 return (error); 3698 3699 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3700 error = namei(&nd); 3701 if (error) 3702 return (error); 3703 3704 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3705 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 3706 3707 vrele(nd.ni_vp); 3708 return (error); 3709 } 3710 3711 int 3712 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval) 3713 { 3714 struct sys_extattr_set_link_args /* { 3715 syscallarg(const char *) path; 3716 syscallarg(int) attrnamespace; 3717 syscallarg(const char *) attrname; 3718 syscallarg(const void *) data; 3719 syscallarg(size_t) nbytes; 3720 } */ *uap = v; 3721 struct nameidata nd; 3722 char attrname[EXTATTR_MAXNAMELEN]; 3723 int error; 3724 3725 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3726 NULL); 3727 if (error) 3728 return (error); 3729 3730 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3731 error = namei(&nd); 3732 if (error) 3733 return (error); 3734 3735 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3736 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 3737 3738 vrele(nd.ni_vp); 3739 return (error); 3740 } 3741 3742 /* 3743 * Get a named extended attribute on a file or directory. 3744 */ 3745 static int 3746 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3747 void *data, size_t nbytes, struct lwp *l, register_t *retval) 3748 { 3749 struct uio auio, *auiop; 3750 struct iovec aiov; 3751 ssize_t cnt; 3752 size_t size, *sizep; 3753 int error; 3754 3755 VOP_LEASE(vp, l, l->l_proc->p_ucred, LEASE_READ); 3756 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3757 3758 /* 3759 * Slightly unusual semantics: if the user provides a NULL data 3760 * pointer, they don't want to receive the data, just the maximum 3761 * read length. 3762 */ 3763 auiop = NULL; 3764 sizep = NULL; 3765 cnt = 0; 3766 if (data != NULL) { 3767 aiov.iov_base = data; 3768 aiov.iov_len = nbytes; 3769 auio.uio_iov = &aiov; 3770 auio.uio_offset = 0; 3771 if (nbytes > INT_MAX) { 3772 error = EINVAL; 3773 goto done; 3774 } 3775 auio.uio_resid = nbytes; 3776 auio.uio_rw = UIO_READ; 3777 auio.uio_segflg = UIO_USERSPACE; 3778 auio.uio_lwp = l; 3779 auiop = &auio; 3780 cnt = nbytes; 3781 } else 3782 sizep = &size; 3783 3784 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, 3785 l->l_proc->p_ucred, l); 3786 3787 if (auiop != NULL) { 3788 cnt -= auio.uio_resid; 3789 retval[0] = cnt; 3790 } else 3791 retval[0] = size; 3792 3793 done: 3794 VOP_UNLOCK(vp, 0); 3795 return (error); 3796 } 3797 3798 int 3799 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval) 3800 { 3801 struct sys_extattr_get_fd_args /* { 3802 syscallarg(int) fd; 3803 syscallarg(int) attrnamespace; 3804 syscallarg(const char *) attrname; 3805 syscallarg(void *) data; 3806 syscallarg(size_t) nbytes; 3807 } */ *uap = v; 3808 struct file *fp; 3809 struct vnode *vp; 3810 char attrname[EXTATTR_MAXNAMELEN]; 3811 int error; 3812 3813 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3814 NULL); 3815 if (error) 3816 return (error); 3817 3818 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 3819 if (error) 3820 return (error); 3821 vp = (struct vnode *) fp->f_data; 3822 3823 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, 3824 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 3825 3826 FILE_UNUSE(fp, l); 3827 return (error); 3828 } 3829 3830 int 3831 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval) 3832 { 3833 struct sys_extattr_get_file_args /* { 3834 syscallarg(const char *) path; 3835 syscallarg(int) attrnamespace; 3836 syscallarg(const char *) attrname; 3837 syscallarg(void *) data; 3838 syscallarg(size_t) nbytes; 3839 } */ *uap = v; 3840 struct nameidata nd; 3841 char attrname[EXTATTR_MAXNAMELEN]; 3842 int error; 3843 3844 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3845 NULL); 3846 if (error) 3847 return (error); 3848 3849 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3850 error = namei(&nd); 3851 if (error) 3852 return (error); 3853 3854 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3855 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 3856 3857 vrele(nd.ni_vp); 3858 return (error); 3859 } 3860 3861 int 3862 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval) 3863 { 3864 struct sys_extattr_get_link_args /* { 3865 syscallarg(const char *) path; 3866 syscallarg(int) attrnamespace; 3867 syscallarg(const char *) attrname; 3868 syscallarg(void *) data; 3869 syscallarg(size_t) nbytes; 3870 } */ *uap = v; 3871 struct nameidata nd; 3872 char attrname[EXTATTR_MAXNAMELEN]; 3873 int error; 3874 3875 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3876 NULL); 3877 if (error) 3878 return (error); 3879 3880 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3881 error = namei(&nd); 3882 if (error) 3883 return (error); 3884 3885 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3886 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 3887 3888 vrele(nd.ni_vp); 3889 return (error); 3890 } 3891 3892 /* 3893 * Delete a named extended attribute on a file or directory. 3894 */ 3895 static int 3896 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3897 struct lwp *l) 3898 { 3899 struct mount *mp; 3900 int error; 3901 3902 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3903 if (error) 3904 return (error); 3905 VOP_LEASE(vp, l, l->l_proc->p_ucred, LEASE_WRITE); 3906 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3907 3908 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, 3909 l->l_proc->p_ucred, l); 3910 if (error == EOPNOTSUPP) 3911 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, 3912 l->l_proc->p_ucred, l); 3913 3914 VOP_UNLOCK(vp, 0); 3915 vn_finished_write(mp, 0); 3916 return (error); 3917 } 3918 3919 int 3920 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval) 3921 { 3922 struct sys_extattr_delete_fd_args /* { 3923 syscallarg(int) fd; 3924 syscallarg(int) attrnamespace; 3925 syscallarg(const char *) attrname; 3926 } */ *uap = v; 3927 struct file *fp; 3928 struct vnode *vp; 3929 char attrname[EXTATTR_MAXNAMELEN]; 3930 int error; 3931 3932 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3933 NULL); 3934 if (error) 3935 return (error); 3936 3937 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 3938 if (error) 3939 return (error); 3940 vp = (struct vnode *) fp->f_data; 3941 3942 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l); 3943 3944 FILE_UNUSE(fp, l); 3945 return (error); 3946 } 3947 3948 int 3949 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval) 3950 { 3951 struct sys_extattr_delete_file_args /* { 3952 syscallarg(const char *) path; 3953 syscallarg(int) attrnamespace; 3954 syscallarg(const char *) attrname; 3955 } */ *uap = v; 3956 struct nameidata nd; 3957 char attrname[EXTATTR_MAXNAMELEN]; 3958 int error; 3959 3960 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3961 NULL); 3962 if (error) 3963 return (error); 3964 3965 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3966 error = namei(&nd); 3967 if (error) 3968 return (error); 3969 3970 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3971 l); 3972 3973 vrele(nd.ni_vp); 3974 return (error); 3975 } 3976 3977 int 3978 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval) 3979 { 3980 struct sys_extattr_delete_link_args /* { 3981 syscallarg(const char *) path; 3982 syscallarg(int) attrnamespace; 3983 syscallarg(const char *) attrname; 3984 } */ *uap = v; 3985 struct nameidata nd; 3986 char attrname[EXTATTR_MAXNAMELEN]; 3987 int error; 3988 3989 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3990 NULL); 3991 if (error) 3992 return (error); 3993 3994 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 3995 error = namei(&nd); 3996 if (error) 3997 return (error); 3998 3999 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4000 l); 4001 4002 vrele(nd.ni_vp); 4003 return (error); 4004 } 4005 4006 /* 4007 * Retrieve a list of extended attributes on a file or directory. 4008 */ 4009 static int 4010 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, 4011 struct lwp *l, register_t *retval) 4012 { 4013 struct uio auio, *auiop; 4014 size_t size, *sizep; 4015 struct iovec aiov; 4016 ssize_t cnt; 4017 int error; 4018 4019 VOP_LEASE(vp, l, l->l_proc->p_ucred, LEASE_READ); 4020 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 4021 4022 auiop = NULL; 4023 sizep = NULL; 4024 cnt = 0; 4025 if (data != NULL) { 4026 aiov.iov_base = data; 4027 aiov.iov_len = nbytes; 4028 auio.uio_iov = &aiov; 4029 auio.uio_offset = 0; 4030 if (nbytes > INT_MAX) { 4031 error = EINVAL; 4032 goto done; 4033 } 4034 auio.uio_resid = nbytes; 4035 auio.uio_rw = UIO_READ; 4036 auio.uio_segflg = UIO_USERSPACE; 4037 auio.uio_lwp = l; 4038 auiop = &auio; 4039 cnt = nbytes; 4040 } else 4041 sizep = &size; 4042 4043 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, 4044 l->l_proc->p_ucred, l); 4045 4046 if (auiop != NULL) { 4047 cnt -= auio.uio_resid; 4048 retval[0] = cnt; 4049 } else 4050 retval[0] = size; 4051 4052 done: 4053 VOP_UNLOCK(vp, 0); 4054 return (error); 4055 } 4056 4057 int 4058 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval) 4059 { 4060 struct sys_extattr_list_fd_args /* { 4061 syscallarg(int) fd; 4062 syscallarg(int) attrnamespace; 4063 syscallarg(void *) data; 4064 syscallarg(size_t) nbytes; 4065 } */ *uap = v; 4066 struct file *fp; 4067 struct vnode *vp; 4068 int error; 4069 4070 error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp); 4071 if (error) 4072 return (error); 4073 vp = (struct vnode *) fp->f_data; 4074 4075 error = extattr_list_vp(vp, SCARG(uap, attrnamespace), 4076 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 4077 4078 FILE_UNUSE(fp, l); 4079 return (error); 4080 } 4081 4082 int 4083 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval) 4084 { 4085 struct sys_extattr_list_file_args /* { 4086 syscallarg(const char *) path; 4087 syscallarg(int) attrnamespace; 4088 syscallarg(void *) data; 4089 syscallarg(size_t) nbytes; 4090 } */ *uap = v; 4091 struct nameidata nd; 4092 int error; 4093 4094 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 4095 error = namei(&nd); 4096 if (error) 4097 return (error); 4098 4099 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4100 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 4101 4102 vrele(nd.ni_vp); 4103 return (error); 4104 } 4105 4106 int 4107 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval) 4108 { 4109 struct sys_extattr_list_link_args /* { 4110 syscallarg(const char *) path; 4111 syscallarg(int) attrnamespace; 4112 syscallarg(void *) data; 4113 syscallarg(size_t) nbytes; 4114 } */ *uap = v; 4115 struct nameidata nd; 4116 int error; 4117 4118 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 4119 error = namei(&nd); 4120 if (error) 4121 return (error); 4122 4123 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4124 SCARG(uap, data), SCARG(uap, nbytes), l, retval); 4125 4126 vrele(nd.ni_vp); 4127 return (error); 4128 } 4129
Indexes created Fri Oct 03 02:09:57 GMT 2025