| File: | kern/vfs_syscalls.c |
| Warning: | line 693, column 9 Although the value stored to 'error' is used in the enclosing expression, the value is never actually read from 'error' |
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| 1 | /* $OpenBSD: vfs_syscalls.c,v 1.362 2023/07/05 15:13:28 beck Exp $ */ |
| 2 | /* $NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1989, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * (c) UNIX System Laboratories, Inc. |
| 8 | * All or some portions of this file are derived from material licensed |
| 9 | * to the University of California by American Telephone and Telegraph |
| 10 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 11 | * the permission of UNIX System Laboratories, Inc. |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or without |
| 14 | * modification, are permitted provided that the following conditions |
| 15 | * are met: |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in the |
| 20 | * documentation and/or other materials provided with the distribution. |
| 21 | * 3. Neither the name of the University nor the names of its contributors |
| 22 | * may be used to endorse or promote products derived from this software |
| 23 | * without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 35 | * SUCH DAMAGE. |
| 36 | * |
| 37 | * @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94 |
| 38 | */ |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/systm.h> |
| 42 | #include <sys/namei.h> |
| 43 | #include <sys/filedesc.h> |
| 44 | #include <sys/conf.h> |
| 45 | #include <sys/fcntl.h> |
| 46 | #include <sys/file.h> |
| 47 | #include <sys/stat.h> |
| 48 | #include <sys/lock.h> |
| 49 | #include <sys/vnode.h> |
| 50 | #include <sys/mount.h> |
| 51 | #include <sys/proc.h> |
| 52 | #include <sys/pledge.h> |
| 53 | #include <sys/uio.h> |
| 54 | #include <sys/malloc.h> |
| 55 | #include <sys/pool.h> |
| 56 | #include <sys/ktrace.h> |
| 57 | #include <sys/unistd.h> |
| 58 | #include <sys/specdev.h> |
| 59 | #include <sys/resourcevar.h> |
| 60 | #include <sys/signalvar.h> |
| 61 | |
| 62 | #include <sys/syscallargs.h> |
| 63 | |
| 64 | extern int suid_clear; |
| 65 | |
| 66 | static int change_dir(struct nameidata *, struct proc *); |
| 67 | |
| 68 | void checkdirs(struct vnode *); |
| 69 | |
| 70 | int copyout_statfs(struct statfs *, void *, struct proc *); |
| 71 | |
| 72 | int doopenat(struct proc *, int, const char *, int, mode_t, register_t *); |
| 73 | int domknodat(struct proc *, int, const char *, mode_t, dev_t); |
| 74 | int dolinkat(struct proc *, int, const char *, int, const char *, int); |
| 75 | int dosymlinkat(struct proc *, const char *, int, const char *); |
| 76 | int dounlinkat(struct proc *, int, const char *, int); |
| 77 | int dofaccessat(struct proc *, int, const char *, int, int); |
| 78 | int dofstatat(struct proc *, int, const char *, struct stat *, int); |
| 79 | int doreadlinkat(struct proc *, int, const char *, char *, size_t, |
| 80 | register_t *); |
| 81 | int dochflagsat(struct proc *, int, const char *, u_int, int); |
| 82 | int dovchflags(struct proc *, struct vnode *, u_int); |
| 83 | int dofchmodat(struct proc *, int, const char *, mode_t, int); |
| 84 | int dofchownat(struct proc *, int, const char *, uid_t, gid_t, int); |
| 85 | int dorenameat(struct proc *, int, const char *, int, const char *); |
| 86 | int domkdirat(struct proc *, int, const char *, mode_t); |
| 87 | int doutimensat(struct proc *, int, const char *, struct timespec [2], int); |
| 88 | int dovutimens(struct proc *, struct vnode *, struct timespec [2]); |
| 89 | int dofutimens(struct proc *, int, struct timespec [2]); |
| 90 | int dounmount_leaf(struct mount *, int, struct proc *); |
| 91 | |
| 92 | /* |
| 93 | * Virtual File System System Calls |
| 94 | */ |
| 95 | |
| 96 | /* |
| 97 | * Mount a file system. |
| 98 | */ |
| 99 | int |
| 100 | sys_mount(struct proc *p, void *v, register_t *retval) |
| 101 | { |
| 102 | struct sys_mount_args /* { |
| 103 | syscallarg(const char *) type; |
| 104 | syscallarg(const char *) path; |
| 105 | syscallarg(int) flags; |
| 106 | syscallarg(void *) data; |
| 107 | } */ *uap = v; |
| 108 | struct vnode *vp; |
| 109 | struct mount *mp; |
| 110 | int error, mntflag = 0; |
| 111 | char fstypename[MFSNAMELEN16]; |
| 112 | char fspath[MNAMELEN90]; |
| 113 | struct nameidata nd; |
| 114 | struct vfsconf *vfsp; |
| 115 | int flags = SCARG(uap, flags)((uap)->flags.le.datum); |
| 116 | void *args = NULL((void *)0); |
| 117 | |
| 118 | if ((error = suser(p))) |
| 119 | return (error); |
| 120 | |
| 121 | /* |
| 122 | * Mount points must fit in MNAMELEN, not MAXPATHLEN. |
| 123 | */ |
| 124 | error = copyinstr(SCARG(uap, path)((uap)->path.le.datum), fspath, MNAMELEN90, NULL((void *)0)); |
| 125 | if (error) |
| 126 | return(error); |
| 127 | |
| 128 | /* |
| 129 | * Get vnode to be covered |
| 130 | */ |
| 131 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspath, p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_SYSSPACE, -100, fspath , p); |
| 132 | if ((error = namei(&nd)) != 0) |
| 133 | goto fail; |
| 134 | vp = nd.ni_vp; |
| 135 | if (flags & MNT_UPDATE0x00010000) { |
| 136 | if ((vp->v_flag & VROOT0x0001) == 0) { |
| 137 | vput(vp); |
| 138 | error = EINVAL22; |
| 139 | goto fail; |
| 140 | } |
| 141 | mp = vp->v_mount; |
| 142 | vfsp = mp->mnt_vfc; |
| 143 | |
| 144 | args = malloc(vfsp->vfc_datasize, M_TEMP127, M_WAITOK0x0001 | M_ZERO0x0008); |
| 145 | error = copyin(SCARG(uap, data)((uap)->data.le.datum), args, vfsp->vfc_datasize); |
| 146 | if (error) { |
| 147 | vput(vp); |
| 148 | goto fail; |
| 149 | } |
| 150 | |
| 151 | mntflag = mp->mnt_flag; |
| 152 | /* |
| 153 | * We only allow the filesystem to be reloaded if it |
| 154 | * is currently mounted read-only. |
| 155 | */ |
| 156 | if ((flags & MNT_RELOAD0x00040000) && |
| 157 | ((mp->mnt_flag & MNT_RDONLY0x00000001) == 0)) { |
| 158 | vput(vp); |
| 159 | error = EOPNOTSUPP45; /* Needs translation */ |
| 160 | goto fail; |
| 161 | } |
| 162 | |
| 163 | if ((error = vfs_busy(mp, VB_READ0x01|VB_NOWAIT0x04)) != 0) { |
| 164 | vput(vp); |
| 165 | goto fail; |
| 166 | } |
| 167 | mp->mnt_flag |= flags & (MNT_RELOAD0x00040000 | MNT_UPDATE0x00010000); |
| 168 | goto update; |
| 169 | } |
| 170 | /* |
| 171 | * Do not allow disabling of permission checks unless exec and access to |
| 172 | * device files is disabled too. |
| 173 | */ |
| 174 | if ((flags & MNT_NOPERM0x00000020) && |
| 175 | (flags & (MNT_NODEV0x00000010 | MNT_NOEXEC0x00000004)) != (MNT_NODEV0x00000010 | MNT_NOEXEC0x00000004)) { |
| 176 | vput(vp); |
| 177 | error = EPERM1; |
| 178 | goto fail; |
| 179 | } |
| 180 | if ((error = vinvalbuf(vp, V_SAVE0x0001, p->p_ucred, p, 0, INFSLP0xffffffffffffffffULL)) != 0) { |
| 181 | vput(vp); |
| 182 | goto fail; |
| 183 | } |
| 184 | if (vp->v_type != VDIR) { |
| 185 | vput(vp); |
| 186 | goto fail; |
| 187 | } |
| 188 | error = copyinstr(SCARG(uap, type)((uap)->type.le.datum), fstypename, MFSNAMELEN16, NULL((void *)0)); |
| 189 | if (error) { |
| 190 | vput(vp); |
| 191 | goto fail; |
| 192 | } |
| 193 | vfsp = vfs_byname(fstypename); |
| 194 | if (vfsp == NULL((void *)0)) { |
| 195 | vput(vp); |
| 196 | error = EOPNOTSUPP45; |
| 197 | goto fail; |
| 198 | } |
| 199 | |
| 200 | args = malloc(vfsp->vfc_datasize, M_TEMP127, M_WAITOK0x0001 | M_ZERO0x0008); |
| 201 | error = copyin(SCARG(uap, data)((uap)->data.le.datum), args, vfsp->vfc_datasize); |
| 202 | if (error) { |
| 203 | vput(vp); |
| 204 | goto fail; |
| 205 | } |
| 206 | |
| 207 | if (vp->v_mountedherev_un.vu_mountedhere != NULL((void *)0)) { |
| 208 | vput(vp); |
| 209 | error = EBUSY16; |
| 210 | goto fail; |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * Allocate and initialize the file system. |
| 215 | */ |
| 216 | mp = vfs_mount_alloc(vp, vfsp); |
| 217 | mp->mnt_stat.f_owner = p->p_ucred->cr_uid; |
| 218 | |
| 219 | update: |
| 220 | /* Ensure that the parent mountpoint does not get unmounted. */ |
| 221 | error = vfs_busy(vp->v_mount, VB_READ0x01|VB_NOWAIT0x04|VB_DUPOK0x10); |
| 222 | if (error) { |
| 223 | if (mp->mnt_flag & MNT_UPDATE0x00010000) { |
| 224 | mp->mnt_flag = mntflag; |
| 225 | vfs_unbusy(mp); |
| 226 | } else { |
| 227 | vfs_unbusy(mp); |
| 228 | vfs_mount_free(mp); |
| 229 | } |
| 230 | vput(vp); |
| 231 | goto fail; |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * Set the mount level flags. |
| 236 | */ |
| 237 | if (flags & MNT_RDONLY0x00000001) |
| 238 | mp->mnt_flag |= MNT_RDONLY0x00000001; |
| 239 | else if (mp->mnt_flag & MNT_RDONLY0x00000001) |
| 240 | mp->mnt_flag |= MNT_WANTRDWR0x02000000; |
| 241 | mp->mnt_flag &=~ (MNT_NOSUID0x00000008 | MNT_NOEXEC0x00000004 | MNT_WXALLOWED0x00000800 | MNT_NODEV0x00000010 | |
| 242 | MNT_SYNCHRONOUS0x00000002 | MNT_ASYNC0x00000040 | MNT_NOATIME0x00008000 | MNT_NOPERM0x00000020 | MNT_FORCE0x00080000); |
| 243 | mp->mnt_flag |= flags & (MNT_NOSUID0x00000008 | MNT_NOEXEC0x00000004 | MNT_WXALLOWED0x00000800 | |
| 244 | MNT_NODEV0x00000010 | MNT_SYNCHRONOUS0x00000002 | MNT_ASYNC0x00000040 | MNT_NOATIME0x00008000 | MNT_NOPERM0x00000020 | |
| 245 | MNT_FORCE0x00080000); |
| 246 | /* |
| 247 | * Mount the filesystem. |
| 248 | */ |
| 249 | error = VFS_MOUNT(mp, fspath, args, &nd, p)(*(mp)->mnt_op->vfs_mount)(mp, fspath, args, &nd, p ); |
| 250 | if (!error) { |
| 251 | mp->mnt_stat.f_ctime = gettime(); |
| 252 | } |
| 253 | if (mp->mnt_flag & MNT_UPDATE0x00010000) { |
| 254 | vfs_unbusy(vp->v_mount); |
| 255 | vput(vp); |
| 256 | if (mp->mnt_flag & MNT_WANTRDWR0x02000000) |
| 257 | mp->mnt_flag &= ~MNT_RDONLY0x00000001; |
| 258 | mp->mnt_flag &= ~MNT_OP_FLAGS(0x00010000 | 0x00040000 | 0x00080000 | 0x02000000); |
| 259 | if (error) |
| 260 | mp->mnt_flag = mntflag; |
| 261 | |
| 262 | if ((mp->mnt_flag & MNT_RDONLY0x00000001) == 0) { |
| 263 | if (mp->mnt_syncer == NULL((void *)0)) |
| 264 | error = vfs_allocate_syncvnode(mp); |
| 265 | } else { |
| 266 | if (mp->mnt_syncer != NULL((void *)0)) |
| 267 | vgone(mp->mnt_syncer); |
| 268 | mp->mnt_syncer = NULL((void *)0); |
| 269 | } |
| 270 | |
| 271 | vfs_unbusy(mp); |
| 272 | goto fail; |
| 273 | } |
| 274 | |
| 275 | mp->mnt_flag &= ~MNT_OP_FLAGS(0x00010000 | 0x00040000 | 0x00080000 | 0x02000000); |
| 276 | vp->v_mountedherev_un.vu_mountedhere = mp; |
| 277 | |
| 278 | /* |
| 279 | * Put the new filesystem on the mount list after root. |
| 280 | */ |
| 281 | cache_purge(vp); |
| 282 | if (!error) { |
| 283 | TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list)do { (mp)->mnt_list.tqe_next = ((void *)0); (mp)->mnt_list .tqe_prev = (&mountlist)->tqh_last; *(&mountlist)-> tqh_last = (mp); (&mountlist)->tqh_last = &(mp)-> mnt_list.tqe_next; } while (0); |
| 284 | checkdirs(vp); |
| 285 | vfs_unbusy(vp->v_mount); |
| 286 | VOP_UNLOCK(vp); |
| 287 | if ((mp->mnt_flag & MNT_RDONLY0x00000001) == 0) |
| 288 | error = vfs_allocate_syncvnode(mp); |
| 289 | vfs_unbusy(mp); |
| 290 | (void) VFS_STATFS(mp, &mp->mnt_stat, p)(*(mp)->mnt_op->vfs_statfs)(mp, &mp->mnt_stat, p ); |
| 291 | if ((error = VFS_START(mp, 0, p)(*(mp)->mnt_op->vfs_start)(mp, 0, p)) != 0) |
| 292 | vrele(vp); |
| 293 | } else { |
| 294 | mp->mnt_vnodecovered->v_mountedherev_un.vu_mountedhere = NULL((void *)0); |
| 295 | vfs_unbusy(mp); |
| 296 | vfs_mount_free(mp); |
| 297 | vfs_unbusy(vp->v_mount); |
| 298 | vput(vp); |
| 299 | } |
| 300 | fail: |
| 301 | if (args) |
| 302 | free(args, M_TEMP127, vfsp->vfc_datasize); |
| 303 | return (error); |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Scan all active processes to see if any of them have a current |
| 308 | * or root directory onto which the new filesystem has just been |
| 309 | * mounted. If so, replace them with the new mount point, keeping |
| 310 | * track of how many were replaced. That's the number of references |
| 311 | * the old vnode had that we've replaced, so finish by vrele()'ing |
| 312 | * it that many times. This puts off any possible sleeping until |
| 313 | * we've finished walking the allprocess list. |
| 314 | */ |
| 315 | void |
| 316 | checkdirs(struct vnode *olddp) |
| 317 | { |
| 318 | struct filedesc *fdp; |
| 319 | struct vnode *newdp; |
| 320 | struct process *pr; |
| 321 | u_int free_count = 0; |
| 322 | |
| 323 | if (olddp->v_usecount == 1) |
| 324 | return; |
| 325 | if (VFS_ROOT(olddp->v_mountedhere, &newdp)(*(olddp->v_un.vu_mountedhere)->mnt_op->vfs_root)(olddp ->v_un.vu_mountedhere, &newdp)) |
| 326 | panic("mount: lost mount"); |
| 327 | LIST_FOREACH(pr, &allprocess, ps_list)for((pr) = ((&allprocess)->lh_first); (pr)!= ((void *) 0); (pr) = ((pr)->ps_list.le_next)) { |
| 328 | fdp = pr->ps_fd; |
| 329 | if (fdp->fd_cdir == olddp) { |
| 330 | free_count++; |
| 331 | vref(newdp); |
| 332 | fdp->fd_cdir = newdp; |
| 333 | } |
| 334 | if (fdp->fd_rdir == olddp) { |
| 335 | free_count++; |
| 336 | vref(newdp); |
| 337 | fdp->fd_rdir = newdp; |
| 338 | } |
| 339 | } |
| 340 | if (rootvnode == olddp) { |
| 341 | free_count++; |
| 342 | vref(newdp); |
| 343 | rootvnode = newdp; |
| 344 | } |
| 345 | while (free_count-- > 0) |
| 346 | vrele(olddp); |
| 347 | vput(newdp); |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * Unmount a file system. |
| 352 | * |
| 353 | * Note: unmount takes a path to the vnode mounted on as argument, |
| 354 | * not special file (as before). |
| 355 | */ |
| 356 | int |
| 357 | sys_unmount(struct proc *p, void *v, register_t *retval) |
| 358 | { |
| 359 | struct sys_unmount_args /* { |
| 360 | syscallarg(const char *) path; |
| 361 | syscallarg(int) flags; |
| 362 | } */ *uap = v; |
| 363 | struct vnode *vp; |
| 364 | struct mount *mp; |
| 365 | int error; |
| 366 | struct nameidata nd; |
| 367 | |
| 368 | if ((error = suser(p)) != 0) |
| 369 | return (error); |
| 370 | |
| 371 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p) |
| 372 | SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p); |
| 373 | if ((error = namei(&nd)) != 0) |
| 374 | return (error); |
| 375 | vp = nd.ni_vp; |
| 376 | mp = vp->v_mount; |
| 377 | |
| 378 | /* |
| 379 | * Don't allow unmounting the root file system. |
| 380 | */ |
| 381 | if (mp->mnt_flag & MNT_ROOTFS0x00004000) { |
| 382 | vput(vp); |
| 383 | return (EINVAL22); |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * Must be the root of the filesystem |
| 388 | */ |
| 389 | if ((vp->v_flag & VROOT0x0001) == 0) { |
| 390 | vput(vp); |
| 391 | return (EINVAL22); |
| 392 | } |
| 393 | vput(vp); |
| 394 | |
| 395 | if (vfs_busy(mp, VB_WRITE0x02|VB_WAIT0x08)) |
| 396 | return (EBUSY16); |
| 397 | |
| 398 | return (dounmount(mp, SCARG(uap, flags)((uap)->flags.le.datum) & MNT_FORCE0x00080000, p)); |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * Do the actual file system unmount. |
| 403 | */ |
| 404 | int |
| 405 | dounmount(struct mount *mp, int flags, struct proc *p) |
| 406 | { |
| 407 | SLIST_HEAD(, mount)struct { struct mount *slh_first; } mplist; |
| 408 | struct mount *nmp; |
| 409 | int error; |
| 410 | |
| 411 | SLIST_INIT(&mplist){ ((&mplist)->slh_first) = ((void *)0); }; |
| 412 | SLIST_INSERT_HEAD(&mplist, mp, mnt_dounmount)do { (mp)->mnt_dounmount.sle_next = (&mplist)->slh_first ; (&mplist)->slh_first = (mp); } while (0); |
| 413 | |
| 414 | /* |
| 415 | * Collect nested mount points. This takes advantage of the mount list |
| 416 | * being ordered - nested mount points come after their parent. |
| 417 | */ |
| 418 | while ((mp = TAILQ_NEXT(mp, mnt_list)((mp)->mnt_list.tqe_next)) != NULL((void *)0)) { |
| 419 | SLIST_FOREACH(nmp, &mplist, mnt_dounmount)for((nmp) = ((&mplist)->slh_first); (nmp) != ((void *) 0); (nmp) = ((nmp)->mnt_dounmount.sle_next)) { |
| 420 | if (mp->mnt_vnodecovered == NULLVP((struct vnode *)((void *)0)) || |
| 421 | mp->mnt_vnodecovered->v_mount != nmp) |
| 422 | continue; |
| 423 | |
| 424 | if ((flags & MNT_FORCE0x00080000) == 0) { |
| 425 | error = EBUSY16; |
| 426 | goto err; |
| 427 | } |
| 428 | error = vfs_busy(mp, VB_WRITE0x02|VB_WAIT0x08|VB_DUPOK0x10); |
| 429 | if (error) { |
| 430 | if ((flags & MNT_DOOMED0x08000000)) { |
| 431 | /* |
| 432 | * If the mount point was busy due to |
| 433 | * being unmounted, it has been removed |
| 434 | * from the mount list already. |
| 435 | * Restart the iteration from the last |
| 436 | * collected busy entry. |
| 437 | */ |
| 438 | mp = SLIST_FIRST(&mplist)((&mplist)->slh_first); |
| 439 | break; |
| 440 | } |
| 441 | goto err; |
| 442 | } |
| 443 | SLIST_INSERT_HEAD(&mplist, mp, mnt_dounmount)do { (mp)->mnt_dounmount.sle_next = (&mplist)->slh_first ; (&mplist)->slh_first = (mp); } while (0); |
| 444 | break; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | /* |
| 449 | * Nested mount points cannot appear during this loop as mounting |
| 450 | * requires a read lock for the parent mount point. |
| 451 | */ |
| 452 | while ((mp = SLIST_FIRST(&mplist)((&mplist)->slh_first)) != NULL((void *)0)) { |
| 453 | SLIST_REMOVE(&mplist, mp, mount, mnt_dounmount)do { if ((&mplist)->slh_first == (mp)) { do { ((&mplist ))->slh_first = ((&mplist))->slh_first->mnt_dounmount .sle_next; } while (0); } else { struct mount *curelm = (& mplist)->slh_first; while (curelm->mnt_dounmount.sle_next != (mp)) curelm = curelm->mnt_dounmount.sle_next; curelm-> mnt_dounmount.sle_next = curelm->mnt_dounmount.sle_next-> mnt_dounmount.sle_next; } ((mp)->mnt_dounmount.sle_next) = ((void *)-1); } while (0); |
| 454 | error = dounmount_leaf(mp, flags, p); |
| 455 | if (error) |
| 456 | goto err; |
| 457 | } |
| 458 | return (0); |
| 459 | |
| 460 | err: |
| 461 | while ((mp = SLIST_FIRST(&mplist)((&mplist)->slh_first)) != NULL((void *)0)) { |
| 462 | SLIST_REMOVE(&mplist, mp, mount, mnt_dounmount)do { if ((&mplist)->slh_first == (mp)) { do { ((&mplist ))->slh_first = ((&mplist))->slh_first->mnt_dounmount .sle_next; } while (0); } else { struct mount *curelm = (& mplist)->slh_first; while (curelm->mnt_dounmount.sle_next != (mp)) curelm = curelm->mnt_dounmount.sle_next; curelm-> mnt_dounmount.sle_next = curelm->mnt_dounmount.sle_next-> mnt_dounmount.sle_next; } ((mp)->mnt_dounmount.sle_next) = ((void *)-1); } while (0); |
| 463 | vfs_unbusy(mp); |
| 464 | } |
| 465 | return (error); |
| 466 | } |
| 467 | |
| 468 | int |
| 469 | dounmount_leaf(struct mount *mp, int flags, struct proc *p) |
| 470 | { |
| 471 | struct vnode *coveredvp; |
| 472 | struct vnode *vp, *nvp; |
| 473 | int error; |
| 474 | int hadsyncer = 0; |
| 475 | |
| 476 | mp->mnt_flag &=~ MNT_ASYNC0x00000040; |
| 477 | cache_purgevfs(mp); /* remove cache entries for this file sys */ |
| 478 | if (mp->mnt_syncer != NULL((void *)0)) { |
| 479 | hadsyncer = 1; |
| 480 | vgone(mp->mnt_syncer); |
| 481 | mp->mnt_syncer = NULL((void *)0); |
| 482 | } |
| 483 | |
| 484 | /* |
| 485 | * Before calling file system unmount, make sure |
| 486 | * all unveils to vnodes in here are dropped. |
| 487 | */ |
| 488 | TAILQ_FOREACH_SAFE(vp , &mp->mnt_vnodelist, v_mntvnodes, nvp)for ((vp) = ((&mp->mnt_vnodelist)->tqh_first); (vp) != ((void *)0) && ((nvp) = ((vp)->v_mntvnodes.tqe_next ), 1); (vp) = (nvp)) { |
| 489 | unveil_removevnode(vp); |
| 490 | } |
| 491 | |
| 492 | if (((mp->mnt_flag & MNT_RDONLY0x00000001) || |
| 493 | (error = VFS_SYNC(mp, MNT_WAIT, 0, p->p_ucred, p)(*(mp)->mnt_op->vfs_sync)(mp, 1, 0, p->p_ucred, p)) == 0) || |
| 494 | (flags & MNT_FORCE0x00080000)) |
| 495 | error = VFS_UNMOUNT(mp, flags, p)(*(mp)->mnt_op->vfs_unmount)(mp, flags, p); |
| 496 | |
| 497 | if (error && !(flags & MNT_DOOMED0x08000000)) { |
| 498 | if ((mp->mnt_flag & MNT_RDONLY0x00000001) == 0 && hadsyncer) |
| 499 | (void) vfs_allocate_syncvnode(mp); |
| 500 | vfs_unbusy(mp); |
| 501 | return (error); |
| 502 | } |
| 503 | |
| 504 | TAILQ_REMOVE(&mountlist, mp, mnt_list)do { if (((mp)->mnt_list.tqe_next) != ((void *)0)) (mp)-> mnt_list.tqe_next->mnt_list.tqe_prev = (mp)->mnt_list.tqe_prev ; else (&mountlist)->tqh_last = (mp)->mnt_list.tqe_prev ; *(mp)->mnt_list.tqe_prev = (mp)->mnt_list.tqe_next; ( (mp)->mnt_list.tqe_prev) = ((void *)-1); ((mp)->mnt_list .tqe_next) = ((void *)-1); } while (0); |
| 505 | if ((coveredvp = mp->mnt_vnodecovered) != NULLVP((struct vnode *)((void *)0))) { |
| 506 | coveredvp->v_mountedherev_un.vu_mountedhere = NULL((void *)0); |
| 507 | vrele(coveredvp); |
| 508 | } |
| 509 | |
| 510 | if (!TAILQ_EMPTY(&mp->mnt_vnodelist)(((&mp->mnt_vnodelist)->tqh_first) == ((void *)0))) |
| 511 | panic("unmount: dangling vnode"); |
| 512 | |
| 513 | vfs_unbusy(mp); |
| 514 | vfs_mount_free(mp); |
| 515 | |
| 516 | return (0); |
| 517 | } |
| 518 | |
| 519 | /* |
| 520 | * Sync each mounted filesystem. |
| 521 | */ |
| 522 | int |
| 523 | sys_sync(struct proc *p, void *v, register_t *retval) |
| 524 | { |
| 525 | struct mount *mp; |
| 526 | int asyncflag; |
| 527 | |
| 528 | TAILQ_FOREACH_REVERSE(mp, &mountlist, mntlist, mnt_list)for((mp) = (*(((struct mntlist *)((&mountlist)->tqh_last ))->tqh_last)); (mp) != ((void *)0); (mp) = (*(((struct mntlist *)((mp)->mnt_list.tqe_prev))->tqh_last))) { |
| 529 | if (vfs_busy(mp, VB_READ0x01|VB_NOWAIT0x04)) |
| 530 | continue; |
| 531 | if ((mp->mnt_flag & MNT_RDONLY0x00000001) == 0) { |
| 532 | asyncflag = mp->mnt_flag & MNT_ASYNC0x00000040; |
| 533 | mp->mnt_flag &= ~MNT_ASYNC0x00000040; |
| 534 | uvm_vnp_sync(mp); |
| 535 | VFS_SYNC(mp, MNT_NOWAIT, 0, p->p_ucred, p)(*(mp)->mnt_op->vfs_sync)(mp, 2, 0, p->p_ucred, p); |
| 536 | if (asyncflag) |
| 537 | mp->mnt_flag |= MNT_ASYNC0x00000040; |
| 538 | } |
| 539 | vfs_unbusy(mp); |
| 540 | } |
| 541 | |
| 542 | return (0); |
| 543 | } |
| 544 | |
| 545 | /* |
| 546 | * Change filesystem quotas. |
| 547 | */ |
| 548 | int |
| 549 | sys_quotactl(struct proc *p, void *v, register_t *retval) |
| 550 | { |
| 551 | struct sys_quotactl_args /* { |
| 552 | syscallarg(const char *) path; |
| 553 | syscallarg(int) cmd; |
| 554 | syscallarg(int) uid; |
| 555 | syscallarg(char *) arg; |
| 556 | } */ *uap = v; |
| 557 | struct mount *mp; |
| 558 | int error; |
| 559 | struct nameidata nd; |
| 560 | |
| 561 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040, UIO_USERSPACE, -100, ((uap)-> path.le.datum), p); |
| 562 | if ((error = namei(&nd)) != 0) |
| 563 | return (error); |
| 564 | mp = nd.ni_vp->v_mount; |
| 565 | vrele(nd.ni_vp); |
| 566 | return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),(*(mp)->mnt_op->vfs_quotactl)(mp, ((uap)->cmd.le.datum ), ((uap)->uid.le.datum), ((uap)->arg.le.datum), p) |
| 567 | SCARG(uap, arg), p)(*(mp)->mnt_op->vfs_quotactl)(mp, ((uap)->cmd.le.datum ), ((uap)->uid.le.datum), ((uap)->arg.le.datum), p)); |
| 568 | } |
| 569 | |
| 570 | int |
| 571 | copyout_statfs(struct statfs *sp, void *uaddr, struct proc *p) |
| 572 | { |
| 573 | size_t co_sz1 = offsetof(struct statfs, f_fsid)__builtin_offsetof(struct statfs, f_fsid); |
| 574 | size_t co_off2 = co_sz1 + sizeof(fsid_t); |
| 575 | size_t co_sz2 = sizeof(struct statfs) - co_off2; |
| 576 | char *s, *d; |
| 577 | int error; |
| 578 | |
| 579 | /* Don't let non-root see filesystem id (for NFS security) */ |
| 580 | if (suser(p)) { |
| 581 | fsid_t fsid; |
| 582 | |
| 583 | s = (char *)sp; |
| 584 | d = (char *)uaddr; |
| 585 | |
| 586 | memset(&fsid, 0, sizeof(fsid))__builtin_memset((&fsid), (0), (sizeof(fsid))); |
| 587 | |
| 588 | if ((error = copyout(s, d, co_sz1)) != 0) |
| 589 | return (error); |
| 590 | if ((error = copyout(&fsid, d + co_sz1, sizeof(fsid))) != 0) |
| 591 | return (error); |
| 592 | return (copyout(s + co_off2, d + co_off2, co_sz2)); |
| 593 | } |
| 594 | |
| 595 | return (copyout(sp, uaddr, sizeof(*sp))); |
| 596 | } |
| 597 | |
| 598 | /* |
| 599 | * Get filesystem statistics. |
| 600 | */ |
| 601 | int |
| 602 | sys_statfs(struct proc *p, void *v, register_t *retval) |
| 603 | { |
| 604 | struct sys_statfs_args /* { |
| 605 | syscallarg(const char *) path; |
| 606 | syscallarg(struct statfs *) buf; |
| 607 | } */ *uap = v; |
| 608 | struct mount *mp; |
| 609 | struct statfs *sp; |
| 610 | int error; |
| 611 | struct nameidata nd; |
| 612 | |
| 613 | NDINIT(&nd, LOOKUP, FOLLOW | BYPASSUNVEIL, UIO_USERSPACE,ndinitat(&nd, 0, 0x0040 | 0x400000, UIO_USERSPACE, -100, ( (uap)->path.le.datum), p) |
| 614 | SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040 | 0x400000, UIO_USERSPACE, -100, ( (uap)->path.le.datum), p); |
| 615 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 616 | nd.ni_unveil = UNVEIL_READ0x01; |
| 617 | if ((error = namei(&nd)) != 0) |
| 618 | return (error); |
| 619 | mp = nd.ni_vp->v_mount; |
| 620 | sp = &mp->mnt_stat; |
| 621 | vrele(nd.ni_vp); |
| 622 | if ((error = VFS_STATFS(mp, sp, p)(*(mp)->mnt_op->vfs_statfs)(mp, sp, p)) != 0) |
| 623 | return (error); |
| 624 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK0x0400ffff; |
| 625 | |
| 626 | return (copyout_statfs(sp, SCARG(uap, buf)((uap)->buf.le.datum), p)); |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | * Get filesystem statistics. |
| 631 | */ |
| 632 | int |
| 633 | sys_fstatfs(struct proc *p, void *v, register_t *retval) |
| 634 | { |
| 635 | struct sys_fstatfs_args /* { |
| 636 | syscallarg(int) fd; |
| 637 | syscallarg(struct statfs *) buf; |
| 638 | } */ *uap = v; |
| 639 | struct file *fp; |
| 640 | struct mount *mp; |
| 641 | struct statfs *sp; |
| 642 | int error; |
| 643 | |
| 644 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 645 | return (error); |
| 646 | mp = ((struct vnode *)fp->f_data)->v_mount; |
| 647 | if (!mp) { |
| 648 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 649 | return (ENOENT2); |
| 650 | } |
| 651 | sp = &mp->mnt_stat; |
| 652 | error = VFS_STATFS(mp, sp, p)(*(mp)->mnt_op->vfs_statfs)(mp, sp, p); |
| 653 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 654 | if (error) |
| 655 | return (error); |
| 656 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK0x0400ffff; |
| 657 | |
| 658 | return (copyout_statfs(sp, SCARG(uap, buf)((uap)->buf.le.datum), p)); |
| 659 | } |
| 660 | |
| 661 | /* |
| 662 | * Get statistics on all filesystems. |
| 663 | */ |
| 664 | int |
| 665 | sys_getfsstat(struct proc *p, void *v, register_t *retval) |
| 666 | { |
| 667 | struct sys_getfsstat_args /* { |
| 668 | syscallarg(struct statfs *) buf; |
| 669 | syscallarg(size_t) bufsize; |
| 670 | syscallarg(int) flags; |
| 671 | } */ *uap = v; |
| 672 | struct mount *mp; |
| 673 | struct statfs *sp; |
| 674 | struct statfs *sfsp; |
| 675 | size_t count, maxcount; |
| 676 | int error, flags = SCARG(uap, flags)((uap)->flags.le.datum); |
| 677 | |
| 678 | maxcount = SCARG(uap, bufsize)((uap)->bufsize.le.datum) / sizeof(struct statfs); |
| 679 | sfsp = SCARG(uap, buf)((uap)->buf.le.datum); |
| 680 | count = 0; |
| 681 | |
| 682 | TAILQ_FOREACH(mp, &mountlist, mnt_list)for((mp) = ((&mountlist)->tqh_first); (mp) != ((void * )0); (mp) = ((mp)->mnt_list.tqe_next)) { |
| 683 | if (vfs_busy(mp, VB_READ0x01|VB_NOWAIT0x04)) |
| 684 | continue; |
| 685 | if (sfsp && count < maxcount) { |
| 686 | sp = &mp->mnt_stat; |
| 687 | |
| 688 | /* Refresh stats unless MNT_NOWAIT is specified */ |
| 689 | if (flags != MNT_NOWAIT2 && |
| 690 | flags != MNT_LAZY3 && |
| 691 | (flags == MNT_WAIT1 || |
| 692 | flags == 0) && |
| 693 | (error = VFS_STATFS(mp, sp, p)(*(mp)->mnt_op->vfs_statfs)(mp, sp, p))) { |
Although the value stored to 'error' is used in the enclosing expression, the value is never actually read from 'error' | |
| 694 | vfs_unbusy(mp); |
| 695 | continue; |
| 696 | } |
| 697 | |
| 698 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK0x0400ffff; |
| 699 | #if notyet |
| 700 | if (mp->mnt_flag & MNT_SOFTDEP0x04000000) |
| 701 | sp->f_eflags = STATFS_SOFTUPD; |
| 702 | #endif |
| 703 | error = (copyout_statfs(sp, sfsp, p)); |
| 704 | if (error) { |
| 705 | vfs_unbusy(mp); |
| 706 | return (error); |
| 707 | } |
| 708 | sfsp++; |
| 709 | } |
| 710 | count++; |
| 711 | vfs_unbusy(mp); |
| 712 | } |
| 713 | |
| 714 | if (sfsp && count > maxcount) |
| 715 | *retval = maxcount; |
| 716 | else |
| 717 | *retval = count; |
| 718 | |
| 719 | return (0); |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | * Change current working directory to a given file descriptor. |
| 724 | */ |
| 725 | int |
| 726 | sys_fchdir(struct proc *p, void *v, register_t *retval) |
| 727 | { |
| 728 | struct sys_fchdir_args /* { |
| 729 | syscallarg(int) fd; |
| 730 | } */ *uap = v; |
| 731 | struct filedesc *fdp = p->p_fd; |
| 732 | struct vnode *vp, *tdp, *old_cdir; |
| 733 | struct mount *mp; |
| 734 | struct file *fp; |
| 735 | int error; |
| 736 | |
| 737 | if ((fp = fd_getfile(fdp, SCARG(uap, fd)((uap)->fd.le.datum))) == NULL((void *)0)) |
| 738 | return (EBADF9); |
| 739 | vp = fp->f_data; |
| 740 | if (fp->f_type != DTYPE_VNODE1 || vp->v_type != VDIR) { |
| 741 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 742 | return (ENOTDIR20); |
| 743 | } |
| 744 | vref(vp); |
| 745 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 746 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 747 | error = VOP_ACCESS(vp, VEXEC00100, p->p_ucred, p); |
| 748 | |
| 749 | while (!error && (mp = vp->v_mountedherev_un.vu_mountedhere) != NULL((void *)0)) { |
| 750 | if (vfs_busy(mp, VB_READ0x01|VB_WAIT0x08)) |
| 751 | continue; |
| 752 | error = VFS_ROOT(mp, &tdp)(*(mp)->mnt_op->vfs_root)(mp, &tdp); |
| 753 | vfs_unbusy(mp); |
| 754 | if (error) |
| 755 | break; |
| 756 | vput(vp); |
| 757 | vp = tdp; |
| 758 | } |
| 759 | if (error) { |
| 760 | vput(vp); |
| 761 | return (error); |
| 762 | } |
| 763 | VOP_UNLOCK(vp); |
| 764 | old_cdir = fdp->fd_cdir; |
| 765 | fdp->fd_cdir = vp; |
| 766 | vrele(old_cdir); |
| 767 | return (0); |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * Change current working directory (``.''). |
| 772 | */ |
| 773 | int |
| 774 | sys_chdir(struct proc *p, void *v, register_t *retval) |
| 775 | { |
| 776 | struct sys_chdir_args /* { |
| 777 | syscallarg(const char *) path; |
| 778 | } */ *uap = v; |
| 779 | struct filedesc *fdp = p->p_fd; |
| 780 | struct vnode *old_cdir; |
| 781 | int error; |
| 782 | struct nameidata nd; |
| 783 | |
| 784 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p) |
| 785 | SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p); |
| 786 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 787 | nd.ni_unveil = UNVEIL_READ0x01; |
| 788 | if ((error = change_dir(&nd, p)) != 0) |
| 789 | return (error); |
| 790 | old_cdir = fdp->fd_cdir; |
| 791 | fdp->fd_cdir = nd.ni_vp; |
| 792 | vrele(old_cdir); |
| 793 | return (0); |
| 794 | } |
| 795 | |
| 796 | /* |
| 797 | * Change notion of root (``/'') directory. |
| 798 | */ |
| 799 | int |
| 800 | sys_chroot(struct proc *p, void *v, register_t *retval) |
| 801 | { |
| 802 | struct sys_chroot_args /* { |
| 803 | syscallarg(const char *) path; |
| 804 | } */ *uap = v; |
| 805 | struct filedesc *fdp = p->p_fd; |
| 806 | struct vnode *old_cdir, *old_rdir; |
| 807 | int error; |
| 808 | struct nameidata nd; |
| 809 | |
| 810 | if ((error = suser(p)) != 0) |
| 811 | return (error); |
| 812 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p) |
| 813 | SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p); |
| 814 | if ((error = change_dir(&nd, p)) != 0) |
| 815 | return (error); |
| 816 | if (fdp->fd_rdir != NULL((void *)0)) { |
| 817 | /* |
| 818 | * A chroot() done inside a changed root environment does |
| 819 | * an automatic chdir to avoid the out-of-tree experience. |
| 820 | */ |
| 821 | vref(nd.ni_vp); |
| 822 | old_rdir = fdp->fd_rdir; |
| 823 | old_cdir = fdp->fd_cdir; |
| 824 | fdp->fd_rdir = fdp->fd_cdir = nd.ni_vp; |
| 825 | vrele(old_rdir); |
| 826 | vrele(old_cdir); |
| 827 | } else |
| 828 | fdp->fd_rdir = nd.ni_vp; |
| 829 | atomic_setbits_intx86_atomic_setbits_u32(&p->p_p->ps_flags, PS_CHROOT0x01000000); |
| 830 | return (0); |
| 831 | } |
| 832 | |
| 833 | /* |
| 834 | * Common routine for chroot and chdir. |
| 835 | */ |
| 836 | static int |
| 837 | change_dir(struct nameidata *ndp, struct proc *p) |
| 838 | { |
| 839 | struct vnode *vp; |
| 840 | int error; |
| 841 | |
| 842 | if ((error = namei(ndp)) != 0) |
| 843 | return (error); |
| 844 | vp = ndp->ni_vp; |
| 845 | if (vp->v_type != VDIR) |
| 846 | error = ENOTDIR20; |
| 847 | else |
| 848 | error = VOP_ACCESS(vp, VEXEC00100, p->p_ucred, p); |
| 849 | if (error) |
| 850 | vput(vp); |
| 851 | else |
| 852 | VOP_UNLOCK(vp); |
| 853 | return (error); |
| 854 | } |
| 855 | |
| 856 | int |
| 857 | sys___realpath(struct proc *p, void *v, register_t *retval) |
| 858 | { |
| 859 | struct sys___realpath_args /* { |
| 860 | syscallarg(const char *) pathname; |
| 861 | syscallarg(char *) resolved; |
| 862 | } */ *uap = v; |
| 863 | char *pathname; |
| 864 | char *rpbuf; |
| 865 | struct nameidata nd; |
| 866 | size_t pathlen; |
| 867 | int error = 0; |
| 868 | |
| 869 | if (SCARG(uap, pathname)((uap)->pathname.le.datum) == NULL((void *)0)) |
| 870 | return (EINVAL22); |
| 871 | |
| 872 | pathname = pool_get(&namei_pool, PR_WAITOK0x0001); |
| 873 | rpbuf = pool_get(&namei_pool, PR_WAITOK0x0001); |
| 874 | |
| 875 | if ((error = copyinstr(SCARG(uap, pathname)((uap)->pathname.le.datum), pathname, MAXPATHLEN1024, |
| 876 | &pathlen))) |
| 877 | goto end; |
| 878 | |
| 879 | if (pathlen == 1) { /* empty string "" */ |
| 880 | error = ENOENT2; |
| 881 | goto end; |
| 882 | } |
| 883 | if (pathlen < 2) { |
| 884 | error = EINVAL22; |
| 885 | goto end; |
| 886 | } |
| 887 | |
| 888 | /* Get cwd for relative path if needed, prepend to rpbuf */ |
| 889 | rpbuf[0] = '\0'; |
| 890 | if (pathname[0] != '/') { |
| 891 | int cwdlen = MAXPATHLEN1024 * 4; /* for vfs_getcwd_common */ |
| 892 | char *cwdbuf, *bp; |
| 893 | |
| 894 | cwdbuf = malloc(cwdlen, M_TEMP127, M_WAITOK0x0001); |
| 895 | |
| 896 | /* vfs_getcwd_common fills this in backwards */ |
| 897 | bp = &cwdbuf[cwdlen - 1]; |
| 898 | *bp = '\0'; |
| 899 | |
| 900 | error = vfs_getcwd_common(p->p_fd->fd_cdir, NULL((void *)0), &bp, cwdbuf, |
| 901 | cwdlen/2, GETCWD_CHECK_ACCESS0x0001, p); |
| 902 | |
| 903 | if (error) { |
| 904 | free(cwdbuf, M_TEMP127, cwdlen); |
| 905 | goto end; |
| 906 | } |
| 907 | |
| 908 | if (strlcpy(rpbuf, bp, MAXPATHLEN1024) >= MAXPATHLEN1024) { |
| 909 | free(cwdbuf, M_TEMP127, cwdlen); |
| 910 | error = ENAMETOOLONG63; |
| 911 | goto end; |
| 912 | } |
| 913 | |
| 914 | free(cwdbuf, M_TEMP127, cwdlen); |
| 915 | } |
| 916 | |
| 917 | NDINIT(&nd, LOOKUP, FOLLOW | SAVENAME | REALPATH, UIO_SYSSPACE,ndinitat(&nd, 0, 0x0040 | 0x000800 | 0x020000, UIO_SYSSPACE , -100, pathname, p) |
| 918 | pathname, p)ndinitat(&nd, 0, 0x0040 | 0x000800 | 0x020000, UIO_SYSSPACE , -100, pathname, p); |
| 919 | |
| 920 | nd.ni_cnd.cn_rpbuf = rpbuf; |
| 921 | nd.ni_cnd.cn_rpi = strlen(rpbuf); |
| 922 | |
| 923 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 924 | nd.ni_unveil = UNVEIL_READ0x01; |
| 925 | if ((error = namei(&nd)) != 0) |
| 926 | goto end; |
| 927 | |
| 928 | /* release reference from namei */ |
| 929 | if (nd.ni_vp) |
| 930 | vrele(nd.ni_vp); |
| 931 | |
| 932 | error = copyoutstr(nd.ni_cnd.cn_rpbuf, SCARG(uap, resolved)((uap)->resolved.le.datum), |
| 933 | MAXPATHLEN1024, NULL((void *)0)); |
| 934 | |
| 935 | #ifdef KTRACE1 |
| 936 | if (KTRPOINT(p, KTR_NAMEI)((p)->p_p->ps_traceflag & (1<<(3)) && ((p)->p_flag & 0x00000001) == 0)) |
| 937 | ktrnamei(p, nd.ni_cnd.cn_rpbuf); |
| 938 | #endif |
| 939 | pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf); |
| 940 | end: |
| 941 | pool_put(&namei_pool, rpbuf); |
| 942 | pool_put(&namei_pool, pathname); |
| 943 | return (error); |
| 944 | } |
| 945 | |
| 946 | int |
| 947 | sys_unveil(struct proc *p, void *v, register_t *retval) |
| 948 | { |
| 949 | struct sys_unveil_args /* { |
| 950 | syscallarg(const char *) path; |
| 951 | syscallarg(const char *) permissions; |
| 952 | } */ *uap = v; |
| 953 | struct process *pr = p->p_p; |
| 954 | char *pathname, *c; |
| 955 | struct nameidata nd; |
| 956 | size_t pathlen; |
| 957 | char permissions[5]; |
| 958 | int error, allow; |
| 959 | |
| 960 | if (SCARG(uap, path)((uap)->path.le.datum) == NULL((void *)0) && SCARG(uap, permissions)((uap)->permissions.le.datum) == NULL((void *)0)) { |
| 961 | pr->ps_uvdone = 1; |
| 962 | return (0); |
| 963 | } |
| 964 | |
| 965 | if (pr->ps_uvdone != 0) |
| 966 | return EPERM1; |
| 967 | |
| 968 | error = copyinstr(SCARG(uap, permissions)((uap)->permissions.le.datum), permissions, |
| 969 | sizeof(permissions), NULL((void *)0)); |
| 970 | if (error) |
| 971 | return (error); |
| 972 | pathname = pool_get(&namei_pool, PR_WAITOK0x0001); |
| 973 | error = copyinstr(SCARG(uap, path)((uap)->path.le.datum), pathname, MAXPATHLEN1024, &pathlen); |
| 974 | if (error) |
| 975 | goto end; |
| 976 | |
| 977 | #ifdef KTRACE1 |
| 978 | if (KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) |
| 979 | ktrstruct(p, "unveil", permissions, strlen(permissions)); |
| 980 | #endif |
| 981 | if (pathlen < 2) { |
| 982 | error = EINVAL22; |
| 983 | goto end; |
| 984 | } |
| 985 | |
| 986 | /* find root "/" or "//" */ |
| 987 | for (c = pathname; *c != '\0'; c++) { |
| 988 | if (*c != '/') |
| 989 | break; |
| 990 | } |
| 991 | if (*c == '\0') |
| 992 | /* root directory */ |
| 993 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | SAVENAME,ndinitat(&nd, 0, 0x0040 | 0x0004 | 0x000800, UIO_SYSSPACE , -100, pathname, p) |
| 994 | UIO_SYSSPACE, pathname, p)ndinitat(&nd, 0, 0x0040 | 0x0004 | 0x000800, UIO_SYSSPACE , -100, pathname, p); |
| 995 | else |
| 996 | NDINIT(&nd, CREATE, FOLLOW | LOCKLEAF | LOCKPARENT | SAVENAME,ndinitat(&nd, 1, 0x0040 | 0x0004 | 0x0008 | 0x000800, UIO_SYSSPACE , -100, pathname, p) |
| 997 | UIO_SYSSPACE, pathname, p)ndinitat(&nd, 1, 0x0040 | 0x0004 | 0x0008 | 0x000800, UIO_SYSSPACE , -100, pathname, p); |
| 998 | |
| 999 | nd.ni_pledge = PLEDGE_UNVEIL0x0000001000000000ULL; |
| 1000 | if ((error = namei(&nd)) != 0) |
| 1001 | goto end; |
| 1002 | |
| 1003 | /* |
| 1004 | * XXX Any access to the file or directory will allow us to |
| 1005 | * pledge path it |
| 1006 | */ |
| 1007 | allow = ((nd.ni_vp && |
| 1008 | (VOP_ACCESS(nd.ni_vp, VREAD00400, p->p_ucred, p) == 0 || |
| 1009 | VOP_ACCESS(nd.ni_vp, VWRITE00200, p->p_ucred, p) == 0 || |
| 1010 | VOP_ACCESS(nd.ni_vp, VEXEC00100, p->p_ucred, p) == 0)) || |
| 1011 | (nd.ni_dvp && |
| 1012 | (VOP_ACCESS(nd.ni_dvp, VREAD00400, p->p_ucred, p) == 0 || |
| 1013 | VOP_ACCESS(nd.ni_dvp, VWRITE00200, p->p_ucred, p) == 0 || |
| 1014 | VOP_ACCESS(nd.ni_dvp, VEXEC00100, p->p_ucred, p) == 0))); |
| 1015 | |
| 1016 | /* release lock from namei, but keep ref */ |
| 1017 | if (nd.ni_vp) |
| 1018 | VOP_UNLOCK(nd.ni_vp); |
| 1019 | if (nd.ni_dvp && nd.ni_dvp != nd.ni_vp) |
| 1020 | VOP_UNLOCK(nd.ni_dvp); |
| 1021 | |
| 1022 | if (allow) |
| 1023 | error = unveil_add(p, &nd, permissions); |
| 1024 | else |
| 1025 | error = EPERM1; |
| 1026 | |
| 1027 | /* release vref from namei, but not vref from unveil_add */ |
| 1028 | if (nd.ni_vp) |
| 1029 | vrele(nd.ni_vp); |
| 1030 | if (nd.ni_dvp) |
| 1031 | vrele(nd.ni_dvp); |
| 1032 | |
| 1033 | pool_put(&namei_pool, nd.ni_cnd.cn_pnbuf); |
| 1034 | end: |
| 1035 | pool_put(&namei_pool, pathname); |
| 1036 | |
| 1037 | return (error); |
| 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * Check permissions, allocate an open file structure, |
| 1042 | * and call the device open routine if any. |
| 1043 | */ |
| 1044 | int |
| 1045 | sys_open(struct proc *p, void *v, register_t *retval) |
| 1046 | { |
| 1047 | struct sys_open_args /* { |
| 1048 | syscallarg(const char *) path; |
| 1049 | syscallarg(int) flags; |
| 1050 | syscallarg(mode_t) mode; |
| 1051 | } */ *uap = v; |
| 1052 | |
| 1053 | return (doopenat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, flags)((uap)->flags.le.datum), |
| 1054 | SCARG(uap, mode)((uap)->mode.le.datum), retval)); |
| 1055 | } |
| 1056 | |
| 1057 | int |
| 1058 | sys_openat(struct proc *p, void *v, register_t *retval) |
| 1059 | { |
| 1060 | struct sys_openat_args /* { |
| 1061 | syscallarg(int) fd; |
| 1062 | syscallarg(const char *) path; |
| 1063 | syscallarg(int) flags; |
| 1064 | syscallarg(mode_t) mode; |
| 1065 | } */ *uap = v; |
| 1066 | |
| 1067 | return (doopenat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 1068 | SCARG(uap, flags)((uap)->flags.le.datum), SCARG(uap, mode)((uap)->mode.le.datum), retval)); |
| 1069 | } |
| 1070 | |
| 1071 | int |
| 1072 | doopenat(struct proc *p, int fd, const char *path, int oflags, mode_t mode, |
| 1073 | register_t *retval) |
| 1074 | { |
| 1075 | struct filedesc *fdp = p->p_fd; |
| 1076 | struct file *fp; |
| 1077 | struct vnode *vp; |
| 1078 | struct vattr vattr; |
| 1079 | int flags, cloexec, cmode; |
| 1080 | int type, indx, error, localtrunc = 0; |
| 1081 | struct flock lf; |
| 1082 | struct nameidata nd; |
| 1083 | uint64_t ni_pledge = 0; |
| 1084 | u_char ni_unveil = 0; |
| 1085 | |
| 1086 | if (oflags & (O_EXLOCK0x0020 | O_SHLOCK0x0010)) { |
| 1087 | error = pledge_flock(p); |
| 1088 | if (error != 0) |
| 1089 | return (error); |
| 1090 | } |
| 1091 | |
| 1092 | cloexec = (oflags & O_CLOEXEC0x10000) ? UF_EXCLOSE0x01 : 0; |
| 1093 | |
| 1094 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1095 | if ((error = falloc(p, &fp, &indx)) != 0) { |
| 1096 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1097 | return (error); |
| 1098 | } |
| 1099 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1100 | |
| 1101 | flags = FFLAGS(oflags)(((oflags) & ~0x0003) | (((oflags) + 1) & 0x0003)); |
| 1102 | if (flags & FREAD0x0001) { |
| 1103 | ni_pledge |= PLEDGE_RPATH0x0000000000000001ULL; |
| 1104 | ni_unveil |= UNVEIL_READ0x01; |
| 1105 | } |
| 1106 | if (flags & FWRITE0x0002) { |
| 1107 | ni_pledge |= PLEDGE_WPATH0x0000000000000002ULL; |
| 1108 | ni_unveil |= UNVEIL_WRITE0x02; |
| 1109 | } |
| 1110 | if (oflags & O_CREAT0x0200) { |
| 1111 | ni_pledge |= PLEDGE_CPATH0x0000000000000004ULL; |
| 1112 | ni_unveil |= UNVEIL_CREATE0x04; |
| 1113 | } |
| 1114 | |
| 1115 | cmode = ((mode &~ fdp->fd_cmask) & ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007)) &~ S_ISTXT0001000; |
| 1116 | if ((p->p_p->ps_flags & PS_PLEDGE0x00100000)) |
| 1117 | cmode &= ACCESSPERMS(0000700|0000070|0000007); |
| 1118 | NDINITAT(&nd, 0, 0, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, 0, UIO_USERSPACE, fd, path, p); |
| 1119 | nd.ni_pledge = ni_pledge; |
| 1120 | nd.ni_unveil = ni_unveil; |
| 1121 | p->p_dupfd = -1; /* XXX check for fdopen */ |
| 1122 | if ((flags & O_TRUNC0x0400) && (flags & (O_EXLOCK0x0020 | O_SHLOCK0x0010))) { |
| 1123 | localtrunc = 1; |
| 1124 | flags &= ~O_TRUNC0x0400; /* Must do truncate ourselves */ |
| 1125 | } |
| 1126 | if ((error = vn_open(&nd, flags, cmode)) != 0) { |
| 1127 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1128 | if (error == ENODEV19 && |
| 1129 | p->p_dupfd >= 0 && /* XXX from fdopen */ |
| 1130 | (error = |
| 1131 | dupfdopen(p, indx, flags)) == 0) { |
| 1132 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1133 | closef(fp, p); |
| 1134 | *retval = indx; |
| 1135 | return (error); |
| 1136 | } |
| 1137 | if (error == ERESTART-1) |
| 1138 | error = EINTR4; |
| 1139 | fdremove(fdp, indx); |
| 1140 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1141 | closef(fp, p); |
| 1142 | return (error); |
| 1143 | } |
| 1144 | p->p_dupfd = 0; |
| 1145 | vp = nd.ni_vp; |
| 1146 | fp->f_flag = flags & FMASK(0x0001|0x0002|0x0008|0x0040|0x0080|0x0004); |
| 1147 | fp->f_type = DTYPE_VNODE1; |
| 1148 | fp->f_ops = &vnops; |
| 1149 | fp->f_data = vp; |
| 1150 | if (flags & (O_EXLOCK0x0020 | O_SHLOCK0x0010)) { |
| 1151 | lf.l_whence = SEEK_SET0; |
| 1152 | lf.l_start = 0; |
| 1153 | lf.l_len = 0; |
| 1154 | if (flags & O_EXLOCK0x0020) |
| 1155 | lf.l_type = F_WRLCK3; |
| 1156 | else |
| 1157 | lf.l_type = F_RDLCK1; |
| 1158 | type = F_FLOCK0x020; |
| 1159 | if ((flags & FNONBLOCK0x0004) == 0) |
| 1160 | type |= F_WAIT0x010; |
| 1161 | VOP_UNLOCK(vp); |
| 1162 | error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK8, &lf, type); |
| 1163 | if (error) { |
| 1164 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1165 | /* closef will vn_close the file for us. */ |
| 1166 | fdremove(fdp, indx); |
| 1167 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1168 | closef(fp, p); |
| 1169 | return (error); |
| 1170 | } |
| 1171 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 1172 | atomic_setbits_intx86_atomic_setbits_u32(&fp->f_iflags, FIF_HASLOCK0x01); |
| 1173 | } |
| 1174 | if (localtrunc) { |
| 1175 | if ((fp->f_flag & FWRITE0x0002) == 0) |
| 1176 | error = EACCES13; |
| 1177 | else if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_RDONLY0x00000001)) |
| 1178 | error = EROFS30; |
| 1179 | else if (vp->v_type == VDIR) |
| 1180 | error = EISDIR21; |
| 1181 | else if ((error = vn_writechk(vp)) == 0) { |
| 1182 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 1183 | vattr.va_size = 0; |
| 1184 | error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); |
| 1185 | } |
| 1186 | if (error) { |
| 1187 | VOP_UNLOCK(vp); |
| 1188 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1189 | /* closef will close the file for us. */ |
| 1190 | fdremove(fdp, indx); |
| 1191 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1192 | closef(fp, p); |
| 1193 | return (error); |
| 1194 | } |
| 1195 | } |
| 1196 | VOP_UNLOCK(vp); |
| 1197 | *retval = indx; |
| 1198 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1199 | fdinsert(fdp, indx, cloexec, fp); |
| 1200 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1201 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 1202 | return (error); |
| 1203 | } |
| 1204 | |
| 1205 | /* |
| 1206 | * Open a new created file (in /tmp) suitable for mmaping. |
| 1207 | */ |
| 1208 | int |
| 1209 | sys___tmpfd(struct proc *p, void *v, register_t *retval) |
| 1210 | { |
| 1211 | struct sys___tmpfd_args /* { |
| 1212 | syscallarg(int) flags; |
| 1213 | } */ *uap = v; |
| 1214 | struct filedesc *fdp = p->p_fd; |
| 1215 | struct file *fp; |
| 1216 | struct vnode *vp; |
| 1217 | int oflags = SCARG(uap, flags)((uap)->flags.le.datum); |
| 1218 | int flags, cloexec, cmode; |
| 1219 | int indx, error; |
| 1220 | unsigned int i; |
| 1221 | struct nameidata nd; |
| 1222 | char path[64]; |
| 1223 | static const char *letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-"; |
| 1224 | |
| 1225 | /* most flags are hardwired */ |
| 1226 | oflags = O_RDWR0x0002 | O_CREAT0x0200 | O_EXCL0x0800 | O_NOFOLLOW0x0100 | (oflags & O_CLOEXEC0x10000); |
| 1227 | |
| 1228 | cloexec = (oflags & O_CLOEXEC0x10000) ? UF_EXCLOSE0x01 : 0; |
| 1229 | |
| 1230 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1231 | if ((error = falloc(p, &fp, &indx)) != 0) { |
| 1232 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1233 | return (error); |
| 1234 | } |
| 1235 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1236 | |
| 1237 | flags = FFLAGS(oflags)(((oflags) & ~0x0003) | (((oflags) + 1) & 0x0003)); |
| 1238 | |
| 1239 | arc4random_buf(path, sizeof(path)); |
| 1240 | memcpy(path, "/tmp/", 5)__builtin_memcpy((path), ("/tmp/"), (5)); |
| 1241 | for (i = 5; i < sizeof(path) - 1; i++) |
| 1242 | path[i] = letters[(unsigned char)path[i] & 63]; |
| 1243 | path[sizeof(path)-1] = 0; |
| 1244 | |
| 1245 | cmode = 0600; |
| 1246 | NDINITAT(&nd, 0, KERNELPATH, UIO_SYSSPACE, AT_FDCWD, path, p)ndinitat(&nd, 0, 0x800000, UIO_SYSSPACE, -100, path, p); |
| 1247 | if ((error = vn_open(&nd, flags, cmode)) != 0) { |
| 1248 | if (error == ERESTART-1) |
| 1249 | error = EINTR4; |
| 1250 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1251 | fdremove(fdp, indx); |
| 1252 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1253 | closef(fp, p); |
| 1254 | return (error); |
| 1255 | } |
| 1256 | vp = nd.ni_vp; |
| 1257 | fp->f_flag = flags & FMASK(0x0001|0x0002|0x0008|0x0040|0x0080|0x0004); |
| 1258 | fp->f_type = DTYPE_VNODE1; |
| 1259 | fp->f_ops = &vnops; |
| 1260 | fp->f_data = vp; |
| 1261 | VOP_UNLOCK(vp); |
| 1262 | *retval = indx; |
| 1263 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1264 | fdinsert(fdp, indx, cloexec, fp); |
| 1265 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1266 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 1267 | |
| 1268 | /* unlink it */ |
| 1269 | /* XXX |
| 1270 | * there is a wee race here, although it is mostly inconsequential. |
| 1271 | * perhaps someday we can create a file like object without a name... |
| 1272 | */ |
| 1273 | NDINITAT(&nd, DELETE, KERNELPATH | LOCKPARENT | LOCKLEAF, UIO_SYSSPACE,ndinitat(&nd, 2, 0x800000 | 0x0008 | 0x0004, UIO_SYSSPACE , -100, path, p) |
| 1274 | AT_FDCWD, path, p)ndinitat(&nd, 2, 0x800000 | 0x0008 | 0x0004, UIO_SYSSPACE , -100, path, p); |
| 1275 | if ((error = namei(&nd)) != 0) { |
| 1276 | printf("can't unlink temp file! %d\n", error); |
| 1277 | error = 0; |
| 1278 | } else { |
| 1279 | vp = nd.ni_vp; |
| 1280 | uvm_vnp_uncache(vp); |
| 1281 | error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 1282 | if (error) { |
| 1283 | printf("error removing vop: %d\n", error); |
| 1284 | error = 0; |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | return (error); |
| 1289 | } |
| 1290 | |
| 1291 | /* |
| 1292 | * Get file handle system call |
| 1293 | */ |
| 1294 | int |
| 1295 | sys_getfh(struct proc *p, void *v, register_t *retval) |
| 1296 | { |
| 1297 | struct sys_getfh_args /* { |
| 1298 | syscallarg(const char *) fname; |
| 1299 | syscallarg(fhandle_t *) fhp; |
| 1300 | } */ *uap = v; |
| 1301 | struct vnode *vp; |
| 1302 | fhandle_t fh; |
| 1303 | int error; |
| 1304 | struct nameidata nd; |
| 1305 | |
| 1306 | /* |
| 1307 | * Must be super user |
| 1308 | */ |
| 1309 | error = suser(p); |
| 1310 | if (error) |
| 1311 | return (error); |
| 1312 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->fname.le.datum), p) |
| 1313 | SCARG(uap, fname), p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->fname.le.datum), p); |
| 1314 | error = namei(&nd); |
| 1315 | if (error) |
| 1316 | return (error); |
| 1317 | vp = nd.ni_vp; |
| 1318 | memset(&fh, 0, sizeof(fh))__builtin_memset((&fh), (0), (sizeof(fh))); |
| 1319 | fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 1320 | error = VFS_VPTOFH(vp, &fh.fh_fid)(*(vp)->v_mount->mnt_op->vfs_vptofh)(vp, &fh.fh_fid ); |
| 1321 | vput(vp); |
| 1322 | if (error) |
| 1323 | return (error); |
| 1324 | error = copyout(&fh, SCARG(uap, fhp)((uap)->fhp.le.datum), sizeof(fh)); |
| 1325 | return (error); |
| 1326 | } |
| 1327 | |
| 1328 | /* |
| 1329 | * Open a file given a file handle. |
| 1330 | * |
| 1331 | * Check permissions, allocate an open file structure, |
| 1332 | * and call the device open routine if any. |
| 1333 | */ |
| 1334 | int |
| 1335 | sys_fhopen(struct proc *p, void *v, register_t *retval) |
| 1336 | { |
| 1337 | struct sys_fhopen_args /* { |
| 1338 | syscallarg(const fhandle_t *) fhp; |
| 1339 | syscallarg(int) flags; |
| 1340 | } */ *uap = v; |
| 1341 | struct filedesc *fdp = p->p_fd; |
| 1342 | struct file *fp; |
| 1343 | struct vnode *vp = NULL((void *)0); |
| 1344 | struct mount *mp; |
| 1345 | struct ucred *cred = p->p_ucred; |
| 1346 | int flags, cloexec; |
| 1347 | int type, indx, error=0; |
| 1348 | struct flock lf; |
| 1349 | struct vattr va; |
| 1350 | fhandle_t fh; |
| 1351 | |
| 1352 | /* |
| 1353 | * Must be super user |
| 1354 | */ |
| 1355 | if ((error = suser(p))) |
| 1356 | return (error); |
| 1357 | |
| 1358 | flags = FFLAGS(SCARG(uap, flags))(((((uap)->flags.le.datum)) & ~0x0003) | (((((uap)-> flags.le.datum)) + 1) & 0x0003)); |
| 1359 | if ((flags & (FREAD0x0001 | FWRITE0x0002)) == 0) |
| 1360 | return (EINVAL22); |
| 1361 | if ((flags & O_CREAT0x0200)) |
| 1362 | return (EINVAL22); |
| 1363 | |
| 1364 | cloexec = (flags & O_CLOEXEC0x10000) ? UF_EXCLOSE0x01 : 0; |
| 1365 | |
| 1366 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1367 | if ((error = falloc(p, &fp, &indx)) != 0) { |
| 1368 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1369 | fp = NULL((void *)0); |
| 1370 | goto bad; |
| 1371 | } |
| 1372 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1373 | |
| 1374 | if ((error = copyin(SCARG(uap, fhp)((uap)->fhp.le.datum), &fh, sizeof(fhandle_t))) != 0) |
| 1375 | goto bad; |
| 1376 | |
| 1377 | if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL((void *)0)) { |
| 1378 | error = ESTALE70; |
| 1379 | goto bad; |
| 1380 | } |
| 1381 | |
| 1382 | if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)(*(mp)->mnt_op->vfs_fhtovp)(mp, &fh.fh_fid, &vp )) != 0) { |
| 1383 | vp = NULL((void *)0); /* most likely unnecessary sanity for bad: */ |
| 1384 | goto bad; |
| 1385 | } |
| 1386 | |
| 1387 | /* Now do an effective vn_open */ |
| 1388 | |
| 1389 | if (vp->v_type == VSOCK) { |
| 1390 | error = EOPNOTSUPP45; |
| 1391 | goto bad; |
| 1392 | } |
| 1393 | if ((flags & O_DIRECTORY0x20000) && vp->v_type != VDIR) { |
| 1394 | error = ENOTDIR20; |
| 1395 | goto bad; |
| 1396 | } |
| 1397 | if (flags & FREAD0x0001) { |
| 1398 | if ((error = VOP_ACCESS(vp, VREAD00400, cred, p)) != 0) |
| 1399 | goto bad; |
| 1400 | } |
| 1401 | if (flags & (FWRITE0x0002 | O_TRUNC0x0400)) { |
| 1402 | if (vp->v_type == VDIR) { |
| 1403 | error = EISDIR21; |
| 1404 | goto bad; |
| 1405 | } |
| 1406 | if ((error = VOP_ACCESS(vp, VWRITE00200, cred, p)) != 0 || |
| 1407 | (error = vn_writechk(vp)) != 0) |
| 1408 | goto bad; |
| 1409 | } |
| 1410 | if (flags & O_TRUNC0x0400) { |
| 1411 | VATTR_NULL(&va)vattr_null(&va); |
| 1412 | va.va_size = 0; |
| 1413 | if ((error = VOP_SETATTR(vp, &va, cred, p)) != 0) |
| 1414 | goto bad; |
| 1415 | } |
| 1416 | if ((error = VOP_OPEN(vp, flags, cred, p)) != 0) |
| 1417 | goto bad; |
| 1418 | if (flags & FWRITE0x0002) |
| 1419 | vp->v_writecount++; |
| 1420 | |
| 1421 | /* done with modified vn_open, now finish what sys_open does. */ |
| 1422 | |
| 1423 | fp->f_flag = flags & FMASK(0x0001|0x0002|0x0008|0x0040|0x0080|0x0004); |
| 1424 | fp->f_type = DTYPE_VNODE1; |
| 1425 | fp->f_ops = &vnops; |
| 1426 | fp->f_data = vp; |
| 1427 | if (flags & (O_EXLOCK0x0020 | O_SHLOCK0x0010)) { |
| 1428 | lf.l_whence = SEEK_SET0; |
| 1429 | lf.l_start = 0; |
| 1430 | lf.l_len = 0; |
| 1431 | if (flags & O_EXLOCK0x0020) |
| 1432 | lf.l_type = F_WRLCK3; |
| 1433 | else |
| 1434 | lf.l_type = F_RDLCK1; |
| 1435 | type = F_FLOCK0x020; |
| 1436 | if ((flags & FNONBLOCK0x0004) == 0) |
| 1437 | type |= F_WAIT0x010; |
| 1438 | VOP_UNLOCK(vp); |
| 1439 | error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK8, &lf, type); |
| 1440 | if (error) { |
| 1441 | vp = NULL((void *)0); /* closef will vn_close the file */ |
| 1442 | goto bad; |
| 1443 | } |
| 1444 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 1445 | atomic_setbits_intx86_atomic_setbits_u32(&fp->f_iflags, FIF_HASLOCK0x01); |
| 1446 | } |
| 1447 | VOP_UNLOCK(vp); |
| 1448 | *retval = indx; |
| 1449 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1450 | fdinsert(fdp, indx, cloexec, fp); |
| 1451 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1452 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 1453 | return (0); |
| 1454 | |
| 1455 | bad: |
| 1456 | if (fp) { |
| 1457 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 1458 | fdremove(fdp, indx); |
| 1459 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 1460 | closef(fp, p); |
| 1461 | if (vp != NULL((void *)0)) |
| 1462 | vput(vp); |
| 1463 | } |
| 1464 | return (error); |
| 1465 | } |
| 1466 | |
| 1467 | int |
| 1468 | sys_fhstat(struct proc *p, void *v, register_t *retval) |
| 1469 | { |
| 1470 | struct sys_fhstat_args /* { |
| 1471 | syscallarg(const fhandle_t *) fhp; |
| 1472 | syscallarg(struct stat *) sb; |
| 1473 | } */ *uap = v; |
| 1474 | struct stat sb; |
| 1475 | int error; |
| 1476 | fhandle_t fh; |
| 1477 | struct mount *mp; |
| 1478 | struct vnode *vp; |
| 1479 | |
| 1480 | /* |
| 1481 | * Must be super user |
| 1482 | */ |
| 1483 | if ((error = suser(p))) |
| 1484 | return (error); |
| 1485 | |
| 1486 | if ((error = copyin(SCARG(uap, fhp)((uap)->fhp.le.datum), &fh, sizeof(fhandle_t))) != 0) |
| 1487 | return (error); |
| 1488 | |
| 1489 | if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL((void *)0)) |
| 1490 | return (ESTALE70); |
| 1491 | if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)(*(mp)->mnt_op->vfs_fhtovp)(mp, &fh.fh_fid, &vp ))) |
| 1492 | return (error); |
| 1493 | error = vn_stat(vp, &sb, p); |
| 1494 | vput(vp); |
| 1495 | if (error) |
| 1496 | return (error); |
| 1497 | error = copyout(&sb, SCARG(uap, sb)((uap)->sb.le.datum), sizeof(sb)); |
| 1498 | return (error); |
| 1499 | } |
| 1500 | |
| 1501 | int |
| 1502 | sys_fhstatfs(struct proc *p, void *v, register_t *retval) |
| 1503 | { |
| 1504 | struct sys_fhstatfs_args /* { |
| 1505 | syscallarg(const fhandle_t *) fhp; |
| 1506 | syscallarg(struct statfs *) buf; |
| 1507 | } */ *uap = v; |
| 1508 | struct statfs *sp; |
| 1509 | fhandle_t fh; |
| 1510 | struct mount *mp; |
| 1511 | struct vnode *vp; |
| 1512 | int error; |
| 1513 | |
| 1514 | /* |
| 1515 | * Must be super user |
| 1516 | */ |
| 1517 | if ((error = suser(p))) |
| 1518 | return (error); |
| 1519 | |
| 1520 | if ((error = copyin(SCARG(uap, fhp)((uap)->fhp.le.datum), &fh, sizeof(fhandle_t))) != 0) |
| 1521 | return (error); |
| 1522 | |
| 1523 | if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL((void *)0)) |
| 1524 | return (ESTALE70); |
| 1525 | if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)(*(mp)->mnt_op->vfs_fhtovp)(mp, &fh.fh_fid, &vp ))) |
| 1526 | return (error); |
| 1527 | mp = vp->v_mount; |
| 1528 | sp = &mp->mnt_stat; |
| 1529 | vput(vp); |
| 1530 | if ((error = VFS_STATFS(mp, sp, p)(*(mp)->mnt_op->vfs_statfs)(mp, sp, p)) != 0) |
| 1531 | return (error); |
| 1532 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK0x0400ffff; |
| 1533 | return (copyout(sp, SCARG(uap, buf)((uap)->buf.le.datum), sizeof(*sp))); |
| 1534 | } |
| 1535 | |
| 1536 | /* |
| 1537 | * Create a special file or named pipe. |
| 1538 | */ |
| 1539 | int |
| 1540 | sys_mknod(struct proc *p, void *v, register_t *retval) |
| 1541 | { |
| 1542 | struct sys_mknod_args /* { |
| 1543 | syscallarg(const char *) path; |
| 1544 | syscallarg(mode_t) mode; |
| 1545 | syscallarg(int) dev; |
| 1546 | } */ *uap = v; |
| 1547 | |
| 1548 | return (domknodat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, mode)((uap)->mode.le.datum), |
| 1549 | SCARG(uap, dev)((uap)->dev.le.datum))); |
| 1550 | } |
| 1551 | |
| 1552 | int |
| 1553 | sys_mknodat(struct proc *p, void *v, register_t *retval) |
| 1554 | { |
| 1555 | struct sys_mknodat_args /* { |
| 1556 | syscallarg(int) fd; |
| 1557 | syscallarg(const char *) path; |
| 1558 | syscallarg(mode_t) mode; |
| 1559 | syscallarg(dev_t) dev; |
| 1560 | } */ *uap = v; |
| 1561 | |
| 1562 | return (domknodat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 1563 | SCARG(uap, mode)((uap)->mode.le.datum), SCARG(uap, dev)((uap)->dev.le.datum))); |
| 1564 | } |
| 1565 | |
| 1566 | int |
| 1567 | domknodat(struct proc *p, int fd, const char *path, mode_t mode, dev_t dev) |
| 1568 | { |
| 1569 | struct vnode *vp; |
| 1570 | struct vattr vattr; |
| 1571 | int error; |
| 1572 | struct nameidata nd; |
| 1573 | |
| 1574 | if (dev == VNOVAL(-1)) |
| 1575 | return (EINVAL22); |
| 1576 | NDINITAT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 1, 0x0008, UIO_USERSPACE, fd, path, p); |
| 1577 | nd.ni_pledge = PLEDGE_DPATH0x0000000010000000ULL; |
| 1578 | nd.ni_unveil = UNVEIL_CREATE0x04; |
| 1579 | if ((error = namei(&nd)) != 0) |
| 1580 | return (error); |
| 1581 | vp = nd.ni_vp; |
| 1582 | if (!S_ISFIFO(mode)((mode & 0170000) == 0010000) || dev != 0) { |
| 1583 | if (!vnoperm(nd.ni_dvp) && (error = suser(p)) != 0) |
| 1584 | goto out; |
| 1585 | if (p->p_fd->fd_rdir) { |
| 1586 | error = EINVAL22; |
| 1587 | goto out; |
| 1588 | } |
| 1589 | } |
| 1590 | if (vp != NULL((void *)0)) |
| 1591 | error = EEXIST17; |
| 1592 | else { |
| 1593 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 1594 | vattr.va_mode = (mode & ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007)) &~ p->p_fd->fd_cmask; |
| 1595 | if ((p->p_p->ps_flags & PS_PLEDGE0x00100000)) |
| 1596 | vattr.va_mode &= ACCESSPERMS(0000700|0000070|0000007); |
| 1597 | vattr.va_rdev = dev; |
| 1598 | |
| 1599 | switch (mode & S_IFMT0170000) { |
| 1600 | case S_IFMT0170000: /* used by badsect to flag bad sectors */ |
| 1601 | vattr.va_type = VBAD; |
| 1602 | break; |
| 1603 | case S_IFCHR0020000: |
| 1604 | vattr.va_type = VCHR; |
| 1605 | break; |
| 1606 | case S_IFBLK0060000: |
| 1607 | vattr.va_type = VBLK; |
| 1608 | break; |
| 1609 | case S_IFIFO0010000: |
| 1610 | #ifndef FIFO1 |
| 1611 | error = EOPNOTSUPP45; |
| 1612 | break; |
| 1613 | #else |
| 1614 | if (dev == 0) { |
| 1615 | vattr.va_type = VFIFO; |
| 1616 | break; |
| 1617 | } |
| 1618 | /* FALLTHROUGH */ |
| 1619 | #endif /* FIFO */ |
| 1620 | default: |
| 1621 | error = EINVAL22; |
| 1622 | break; |
| 1623 | } |
| 1624 | } |
| 1625 | out: |
| 1626 | if (!error) { |
| 1627 | error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); |
| 1628 | vput(nd.ni_dvp); |
| 1629 | } else { |
| 1630 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1631 | if (nd.ni_dvp == vp) |
| 1632 | vrele(nd.ni_dvp); |
| 1633 | else |
| 1634 | vput(nd.ni_dvp); |
| 1635 | if (vp) |
| 1636 | vrele(vp); |
| 1637 | } |
| 1638 | return (error); |
| 1639 | } |
| 1640 | |
| 1641 | /* |
| 1642 | * Create a named pipe. |
| 1643 | */ |
| 1644 | int |
| 1645 | sys_mkfifo(struct proc *p, void *v, register_t *retval) |
| 1646 | { |
| 1647 | struct sys_mkfifo_args /* { |
| 1648 | syscallarg(const char *) path; |
| 1649 | syscallarg(mode_t) mode; |
| 1650 | } */ *uap = v; |
| 1651 | |
| 1652 | return (domknodat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), |
| 1653 | (SCARG(uap, mode)((uap)->mode.le.datum) & ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007)) | S_IFIFO0010000, 0)); |
| 1654 | } |
| 1655 | |
| 1656 | int |
| 1657 | sys_mkfifoat(struct proc *p, void *v, register_t *retval) |
| 1658 | { |
| 1659 | struct sys_mkfifoat_args /* { |
| 1660 | syscallarg(int) fd; |
| 1661 | syscallarg(const char *) path; |
| 1662 | syscallarg(mode_t) mode; |
| 1663 | } */ *uap = v; |
| 1664 | |
| 1665 | return (domknodat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 1666 | (SCARG(uap, mode)((uap)->mode.le.datum) & ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007)) | S_IFIFO0010000, 0)); |
| 1667 | } |
| 1668 | |
| 1669 | /* |
| 1670 | * Make a hard file link. |
| 1671 | */ |
| 1672 | int |
| 1673 | sys_link(struct proc *p, void *v, register_t *retval) |
| 1674 | { |
| 1675 | struct sys_link_args /* { |
| 1676 | syscallarg(const char *) path; |
| 1677 | syscallarg(const char *) link; |
| 1678 | } */ *uap = v; |
| 1679 | |
| 1680 | return (dolinkat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), AT_FDCWD-100, |
| 1681 | SCARG(uap, link)((uap)->link.le.datum), AT_SYMLINK_FOLLOW0x04)); |
| 1682 | } |
| 1683 | |
| 1684 | int |
| 1685 | sys_linkat(struct proc *p, void *v, register_t *retval) |
| 1686 | { |
| 1687 | struct sys_linkat_args /* { |
| 1688 | syscallarg(int) fd1; |
| 1689 | syscallarg(const char *) path1; |
| 1690 | syscallarg(int) fd2; |
| 1691 | syscallarg(const char *) path2; |
| 1692 | syscallarg(int) flag; |
| 1693 | } */ *uap = v; |
| 1694 | |
| 1695 | return (dolinkat(p, SCARG(uap, fd1)((uap)->fd1.le.datum), SCARG(uap, path1)((uap)->path1.le.datum), |
| 1696 | SCARG(uap, fd2)((uap)->fd2.le.datum), SCARG(uap, path2)((uap)->path2.le.datum), SCARG(uap, flag)((uap)->flag.le.datum))); |
| 1697 | } |
| 1698 | |
| 1699 | int |
| 1700 | dolinkat(struct proc *p, int fd1, const char *path1, int fd2, |
| 1701 | const char *path2, int flag) |
| 1702 | { |
| 1703 | struct vnode *vp; |
| 1704 | struct nameidata nd; |
| 1705 | int error, follow; |
| 1706 | int flags; |
| 1707 | |
| 1708 | if (flag & ~AT_SYMLINK_FOLLOW0x04) |
| 1709 | return (EINVAL22); |
| 1710 | |
| 1711 | follow = (flag & AT_SYMLINK_FOLLOW0x04) ? FOLLOW0x0040 : NOFOLLOW0x0000; |
| 1712 | NDINITAT(&nd, LOOKUP, follow, UIO_USERSPACE, fd1, path1, p)ndinitat(&nd, 0, follow, UIO_USERSPACE, fd1, path1, p); |
| 1713 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 1714 | nd.ni_unveil = UNVEIL_READ0x01; |
| 1715 | if ((error = namei(&nd)) != 0) |
| 1716 | return (error); |
| 1717 | vp = nd.ni_vp; |
| 1718 | |
| 1719 | flags = LOCKPARENT0x0008; |
| 1720 | if (vp->v_type == VDIR) { |
| 1721 | flags |= STRIPSLASHES0x100000; |
| 1722 | } |
| 1723 | |
| 1724 | NDINITAT(&nd, CREATE, flags, UIO_USERSPACE, fd2, path2, p)ndinitat(&nd, 1, flags, UIO_USERSPACE, fd2, path2, p); |
| 1725 | nd.ni_pledge = PLEDGE_CPATH0x0000000000000004ULL; |
| 1726 | nd.ni_unveil = UNVEIL_CREATE0x04; |
| 1727 | if ((error = namei(&nd)) != 0) |
| 1728 | goto out; |
| 1729 | if (nd.ni_vp) { |
| 1730 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1731 | if (nd.ni_dvp == nd.ni_vp) |
| 1732 | vrele(nd.ni_dvp); |
| 1733 | else |
| 1734 | vput(nd.ni_dvp); |
| 1735 | vrele(nd.ni_vp); |
| 1736 | error = EEXIST17; |
| 1737 | goto out; |
| 1738 | } |
| 1739 | error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); |
| 1740 | out: |
| 1741 | vrele(vp); |
| 1742 | return (error); |
| 1743 | } |
| 1744 | |
| 1745 | /* |
| 1746 | * Make a symbolic link. |
| 1747 | */ |
| 1748 | int |
| 1749 | sys_symlink(struct proc *p, void *v, register_t *retval) |
| 1750 | { |
| 1751 | struct sys_symlink_args /* { |
| 1752 | syscallarg(const char *) path; |
| 1753 | syscallarg(const char *) link; |
| 1754 | } */ *uap = v; |
| 1755 | |
| 1756 | return (dosymlinkat(p, SCARG(uap, path)((uap)->path.le.datum), AT_FDCWD-100, SCARG(uap, link)((uap)->link.le.datum))); |
| 1757 | } |
| 1758 | |
| 1759 | int |
| 1760 | sys_symlinkat(struct proc *p, void *v, register_t *retval) |
| 1761 | { |
| 1762 | struct sys_symlinkat_args /* { |
| 1763 | syscallarg(const char *) path; |
| 1764 | syscallarg(int) fd; |
| 1765 | syscallarg(const char *) link; |
| 1766 | } */ *uap = v; |
| 1767 | |
| 1768 | return (dosymlinkat(p, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, fd)((uap)->fd.le.datum), |
| 1769 | SCARG(uap, link)((uap)->link.le.datum))); |
| 1770 | } |
| 1771 | |
| 1772 | int |
| 1773 | dosymlinkat(struct proc *p, const char *upath, int fd, const char *link) |
| 1774 | { |
| 1775 | struct vattr vattr; |
| 1776 | char *path; |
| 1777 | int error; |
| 1778 | struct nameidata nd; |
| 1779 | |
| 1780 | path = pool_get(&namei_pool, PR_WAITOK0x0001); |
| 1781 | error = copyinstr(upath, path, MAXPATHLEN1024, NULL((void *)0)); |
| 1782 | if (error) |
| 1783 | goto out; |
| 1784 | NDINITAT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, fd, link, p)ndinitat(&nd, 1, 0x0008, UIO_USERSPACE, fd, link, p); |
| 1785 | nd.ni_pledge = PLEDGE_CPATH0x0000000000000004ULL; |
| 1786 | nd.ni_unveil = UNVEIL_CREATE0x04; |
| 1787 | if ((error = namei(&nd)) != 0) |
| 1788 | goto out; |
| 1789 | if (nd.ni_vp) { |
| 1790 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1791 | if (nd.ni_dvp == nd.ni_vp) |
| 1792 | vrele(nd.ni_dvp); |
| 1793 | else |
| 1794 | vput(nd.ni_dvp); |
| 1795 | vrele(nd.ni_vp); |
| 1796 | error = EEXIST17; |
| 1797 | goto out; |
| 1798 | } |
| 1799 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 1800 | vattr.va_mode = ACCESSPERMS(0000700|0000070|0000007) &~ p->p_fd->fd_cmask; |
| 1801 | error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); |
| 1802 | out: |
| 1803 | pool_put(&namei_pool, path); |
| 1804 | return (error); |
| 1805 | } |
| 1806 | |
| 1807 | /* |
| 1808 | * Delete a name from the filesystem. |
| 1809 | */ |
| 1810 | int |
| 1811 | sys_unlink(struct proc *p, void *v, register_t *retval) |
| 1812 | { |
| 1813 | struct sys_unlink_args /* { |
| 1814 | syscallarg(const char *) path; |
| 1815 | } */ *uap = v; |
| 1816 | |
| 1817 | return (dounlinkat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), 0)); |
| 1818 | } |
| 1819 | |
| 1820 | int |
| 1821 | sys_unlinkat(struct proc *p, void *v, register_t *retval) |
| 1822 | { |
| 1823 | struct sys_unlinkat_args /* { |
| 1824 | syscallarg(int) fd; |
| 1825 | syscallarg(const char *) path; |
| 1826 | syscallarg(int) flag; |
| 1827 | } */ *uap = v; |
| 1828 | |
| 1829 | return (dounlinkat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 1830 | SCARG(uap, flag)((uap)->flag.le.datum))); |
| 1831 | } |
| 1832 | |
| 1833 | int |
| 1834 | dounlinkat(struct proc *p, int fd, const char *path, int flag) |
| 1835 | { |
| 1836 | struct vnode *vp; |
| 1837 | int error; |
| 1838 | struct nameidata nd; |
| 1839 | |
| 1840 | if (flag & ~AT_REMOVEDIR0x08) |
| 1841 | return (EINVAL22); |
| 1842 | |
| 1843 | NDINITAT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,ndinitat(&nd, 2, 0x0008 | 0x0004, UIO_USERSPACE, fd, path , p) |
| 1844 | fd, path, p)ndinitat(&nd, 2, 0x0008 | 0x0004, UIO_USERSPACE, fd, path , p); |
| 1845 | nd.ni_pledge = PLEDGE_CPATH0x0000000000000004ULL; |
| 1846 | nd.ni_unveil = UNVEIL_CREATE0x04; |
| 1847 | if ((error = namei(&nd)) != 0) |
| 1848 | return (error); |
| 1849 | vp = nd.ni_vp; |
| 1850 | |
| 1851 | if (flag & AT_REMOVEDIR0x08) { |
| 1852 | if (vp->v_type != VDIR) { |
| 1853 | error = ENOTDIR20; |
| 1854 | goto out; |
| 1855 | } |
| 1856 | /* |
| 1857 | * No rmdir "." please. |
| 1858 | */ |
| 1859 | if (nd.ni_dvp == vp) { |
| 1860 | error = EINVAL22; |
| 1861 | goto out; |
| 1862 | } |
| 1863 | /* |
| 1864 | * A mounted on directory cannot be deleted. |
| 1865 | */ |
| 1866 | if (vp->v_mountedherev_un.vu_mountedhere != NULL((void *)0)) { |
| 1867 | error = EBUSY16; |
| 1868 | goto out; |
| 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | /* |
| 1873 | * The root of a mounted filesystem cannot be deleted. |
| 1874 | */ |
| 1875 | if (vp->v_flag & VROOT0x0001) |
| 1876 | error = EBUSY16; |
| 1877 | out: |
| 1878 | if (!error) { |
| 1879 | if (flag & AT_REMOVEDIR0x08) { |
| 1880 | error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 1881 | } else { |
| 1882 | (void)uvm_vnp_uncache(vp); |
| 1883 | error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 1884 | } |
| 1885 | } else { |
| 1886 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1887 | if (nd.ni_dvp == vp) |
| 1888 | vrele(nd.ni_dvp); |
| 1889 | else |
| 1890 | vput(nd.ni_dvp); |
| 1891 | vput(vp); |
| 1892 | } |
| 1893 | return (error); |
| 1894 | } |
| 1895 | |
| 1896 | /* |
| 1897 | * Reposition read/write file offset. |
| 1898 | */ |
| 1899 | int |
| 1900 | sys_lseek(struct proc *p, void *v, register_t *retval) |
| 1901 | { |
| 1902 | struct sys_lseek_args /* { |
| 1903 | syscallarg(int) fd; |
| 1904 | syscallarg(off_t) offset; |
| 1905 | syscallarg(int) whence; |
| 1906 | } */ *uap = v; |
| 1907 | struct filedesc *fdp = p->p_fd; |
| 1908 | struct file *fp; |
| 1909 | off_t offset; |
| 1910 | int error; |
| 1911 | |
| 1912 | if ((fp = fd_getfile(fdp, SCARG(uap, fd)((uap)->fd.le.datum))) == NULL((void *)0)) |
| 1913 | return (EBADF9); |
| 1914 | if (fp->f_ops->fo_seek == NULL((void *)0)) { |
| 1915 | error = ESPIPE29; |
| 1916 | goto bad; |
| 1917 | } |
| 1918 | offset = SCARG(uap, offset)((uap)->offset.le.datum); |
| 1919 | |
| 1920 | error = (*fp->f_ops->fo_seek)(fp, &offset, SCARG(uap, whence)((uap)->whence.le.datum), p); |
| 1921 | if (error) |
| 1922 | goto bad; |
| 1923 | |
| 1924 | *(off_t *)retval = offset; |
| 1925 | mtx_enter(&fp->f_mtx); |
| 1926 | fp->f_seek++; |
| 1927 | mtx_leave(&fp->f_mtx); |
| 1928 | error = 0; |
| 1929 | bad: |
| 1930 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 1931 | return (error); |
| 1932 | } |
| 1933 | |
| 1934 | /* |
| 1935 | * Check access permissions. |
| 1936 | */ |
| 1937 | int |
| 1938 | sys_access(struct proc *p, void *v, register_t *retval) |
| 1939 | { |
| 1940 | struct sys_access_args /* { |
| 1941 | syscallarg(const char *) path; |
| 1942 | syscallarg(int) amode; |
| 1943 | } */ *uap = v; |
| 1944 | |
| 1945 | return (dofaccessat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), |
| 1946 | SCARG(uap, amode)((uap)->amode.le.datum), 0)); |
| 1947 | } |
| 1948 | |
| 1949 | int |
| 1950 | sys_faccessat(struct proc *p, void *v, register_t *retval) |
| 1951 | { |
| 1952 | struct sys_faccessat_args /* { |
| 1953 | syscallarg(int) fd; |
| 1954 | syscallarg(const char *) path; |
| 1955 | syscallarg(int) amode; |
| 1956 | syscallarg(int) flag; |
| 1957 | } */ *uap = v; |
| 1958 | |
| 1959 | return (dofaccessat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 1960 | SCARG(uap, amode)((uap)->amode.le.datum), SCARG(uap, flag)((uap)->flag.le.datum))); |
| 1961 | } |
| 1962 | |
| 1963 | int |
| 1964 | dofaccessat(struct proc *p, int fd, const char *path, int amode, int flag) |
| 1965 | { |
| 1966 | struct vnode *vp; |
| 1967 | struct ucred *newcred, *oldcred; |
| 1968 | struct nameidata nd; |
| 1969 | int error; |
| 1970 | |
| 1971 | if (amode & ~(R_OK0x04 | W_OK0x02 | X_OK0x01)) |
| 1972 | return (EINVAL22); |
| 1973 | if (flag & ~AT_EACCESS0x01) |
| 1974 | return (EINVAL22); |
| 1975 | |
| 1976 | newcred = NULL((void *)0); |
| 1977 | oldcred = p->p_ucred; |
| 1978 | |
| 1979 | /* |
| 1980 | * If access as real ids was requested and they really differ, |
| 1981 | * give the thread new creds with them reset |
| 1982 | */ |
| 1983 | if ((flag & AT_EACCESS0x01) == 0 && |
| 1984 | (oldcred->cr_uid != oldcred->cr_ruid || |
| 1985 | (oldcred->cr_gid != oldcred->cr_rgid))) { |
| 1986 | p->p_ucred = newcred = crdup(oldcred); |
| 1987 | newcred->cr_uid = newcred->cr_ruid; |
| 1988 | newcred->cr_gid = newcred->cr_rgid; |
| 1989 | } |
| 1990 | |
| 1991 | NDINITAT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, fd, path , p); |
| 1992 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 1993 | nd.ni_unveil = UNVEIL_READ0x01; |
| 1994 | if ((error = namei(&nd)) != 0) |
| 1995 | goto out; |
| 1996 | vp = nd.ni_vp; |
| 1997 | |
| 1998 | /* Flags == 0 means only check for existence. */ |
| 1999 | if (amode) { |
| 2000 | int vflags = 0; |
| 2001 | |
| 2002 | if (amode & R_OK0x04) |
| 2003 | vflags |= VREAD00400; |
| 2004 | if (amode & W_OK0x02) |
| 2005 | vflags |= VWRITE00200; |
| 2006 | if (amode & X_OK0x01) |
| 2007 | vflags |= VEXEC00100; |
| 2008 | |
| 2009 | error = VOP_ACCESS(vp, vflags, p->p_ucred, p); |
| 2010 | if (!error && (vflags & VWRITE00200)) |
| 2011 | error = vn_writechk(vp); |
| 2012 | } |
| 2013 | vput(vp); |
| 2014 | out: |
| 2015 | if (newcred != NULL((void *)0)) { |
| 2016 | p->p_ucred = oldcred; |
| 2017 | crfree(newcred); |
| 2018 | } |
| 2019 | return (error); |
| 2020 | } |
| 2021 | |
| 2022 | /* |
| 2023 | * Get file status; this version follows links. |
| 2024 | */ |
| 2025 | int |
| 2026 | sys_stat(struct proc *p, void *v, register_t *retval) |
| 2027 | { |
| 2028 | struct sys_stat_args /* { |
| 2029 | syscallarg(const char *) path; |
| 2030 | syscallarg(struct stat *) ub; |
| 2031 | } */ *uap = v; |
| 2032 | |
| 2033 | return (dofstatat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, ub)((uap)->ub.le.datum), 0)); |
| 2034 | } |
| 2035 | |
| 2036 | int |
| 2037 | sys_fstatat(struct proc *p, void *v, register_t *retval) |
| 2038 | { |
| 2039 | struct sys_fstatat_args /* { |
| 2040 | syscallarg(int) fd; |
| 2041 | syscallarg(const char *) path; |
| 2042 | syscallarg(struct stat *) buf; |
| 2043 | syscallarg(int) flag; |
| 2044 | } */ *uap = v; |
| 2045 | |
| 2046 | return (dofstatat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 2047 | SCARG(uap, buf)((uap)->buf.le.datum), SCARG(uap, flag)((uap)->flag.le.datum))); |
| 2048 | } |
| 2049 | |
| 2050 | int |
| 2051 | dofstatat(struct proc *p, int fd, const char *path, struct stat *buf, int flag) |
| 2052 | { |
| 2053 | struct stat sb; |
| 2054 | int error, follow; |
| 2055 | struct nameidata nd; |
| 2056 | |
| 2057 | if (flag & ~AT_SYMLINK_NOFOLLOW0x02) |
| 2058 | return (EINVAL22); |
| 2059 | |
| 2060 | |
| 2061 | follow = (flag & AT_SYMLINK_NOFOLLOW0x02) ? NOFOLLOW0x0000 : FOLLOW0x0040; |
| 2062 | NDINITAT(&nd, LOOKUP, follow | LOCKLEAF, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, follow | 0x0004, UIO_USERSPACE, fd, path , p); |
| 2063 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 2064 | nd.ni_unveil = UNVEIL_READ0x01; |
| 2065 | if ((error = namei(&nd)) != 0) |
| 2066 | return (error); |
| 2067 | error = vn_stat(nd.ni_vp, &sb, p); |
| 2068 | vput(nd.ni_vp); |
| 2069 | if (error) |
| 2070 | return (error); |
| 2071 | /* Don't let non-root see generation numbers (for NFS security) */ |
| 2072 | if (suser(p)) |
| 2073 | sb.st_gen = 0; |
| 2074 | error = copyout(&sb, buf, sizeof(sb)); |
| 2075 | #ifdef KTRACE1 |
| 2076 | if (error == 0 && KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) |
| 2077 | ktrstat(p, &sb)ktrstruct((p), "stat", (&sb), sizeof(struct stat)); |
| 2078 | #endif |
| 2079 | return (error); |
| 2080 | } |
| 2081 | |
| 2082 | /* |
| 2083 | * Get file status; this version does not follow links. |
| 2084 | */ |
| 2085 | int |
| 2086 | sys_lstat(struct proc *p, void *v, register_t *retval) |
| 2087 | { |
| 2088 | struct sys_lstat_args /* { |
| 2089 | syscallarg(const char *) path; |
| 2090 | syscallarg(struct stat *) ub; |
| 2091 | } */ *uap = v; |
| 2092 | |
| 2093 | return (dofstatat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, ub)((uap)->ub.le.datum), |
| 2094 | AT_SYMLINK_NOFOLLOW0x02)); |
| 2095 | } |
| 2096 | |
| 2097 | /* |
| 2098 | * Get configurable pathname variables. |
| 2099 | */ |
| 2100 | int |
| 2101 | sys_pathconf(struct proc *p, void *v, register_t *retval) |
| 2102 | { |
| 2103 | struct sys_pathconf_args /* { |
| 2104 | syscallarg(const char *) path; |
| 2105 | syscallarg(int) name; |
| 2106 | } */ *uap = v; |
| 2107 | int error; |
| 2108 | struct nameidata nd; |
| 2109 | |
| 2110 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p) |
| 2111 | SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040 | 0x0004, UIO_USERSPACE, -100, (( uap)->path.le.datum), p); |
| 2112 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 2113 | nd.ni_unveil = UNVEIL_READ0x01; |
| 2114 | if ((error = namei(&nd)) != 0) |
| 2115 | return (error); |
| 2116 | error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name)((uap)->name.le.datum), retval); |
| 2117 | vput(nd.ni_vp); |
| 2118 | return (error); |
| 2119 | } |
| 2120 | |
| 2121 | /* |
| 2122 | * Return target name of a symbolic link. |
| 2123 | */ |
| 2124 | int |
| 2125 | sys_readlink(struct proc *p, void *v, register_t *retval) |
| 2126 | { |
| 2127 | struct sys_readlink_args /* { |
| 2128 | syscallarg(const char *) path; |
| 2129 | syscallarg(char *) buf; |
| 2130 | syscallarg(size_t) count; |
| 2131 | } */ *uap = v; |
| 2132 | |
| 2133 | return (doreadlinkat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, buf)((uap)->buf.le.datum), |
| 2134 | SCARG(uap, count)((uap)->count.le.datum), retval)); |
| 2135 | } |
| 2136 | |
| 2137 | int |
| 2138 | sys_readlinkat(struct proc *p, void *v, register_t *retval) |
| 2139 | { |
| 2140 | struct sys_readlinkat_args /* { |
| 2141 | syscallarg(int) fd; |
| 2142 | syscallarg(const char *) path; |
| 2143 | syscallarg(char *) buf; |
| 2144 | syscallarg(size_t) count; |
| 2145 | } */ *uap = v; |
| 2146 | |
| 2147 | return (doreadlinkat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 2148 | SCARG(uap, buf)((uap)->buf.le.datum), SCARG(uap, count)((uap)->count.le.datum), retval)); |
| 2149 | } |
| 2150 | |
| 2151 | int |
| 2152 | doreadlinkat(struct proc *p, int fd, const char *path, char *buf, |
| 2153 | size_t count, register_t *retval) |
| 2154 | { |
| 2155 | struct vnode *vp; |
| 2156 | struct iovec aiov; |
| 2157 | struct uio auio; |
| 2158 | int error; |
| 2159 | struct nameidata nd; |
| 2160 | |
| 2161 | NDINITAT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, 0x0000 | 0x0004, UIO_USERSPACE, fd, path , p); |
| 2162 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL; |
| 2163 | nd.ni_unveil = UNVEIL_READ0x01; |
| 2164 | if ((error = namei(&nd)) != 0) |
| 2165 | return (error); |
| 2166 | vp = nd.ni_vp; |
| 2167 | if (vp->v_type != VLNK) |
| 2168 | error = EINVAL22; |
| 2169 | else { |
| 2170 | aiov.iov_base = buf; |
| 2171 | aiov.iov_len = count; |
| 2172 | auio.uio_iov = &aiov; |
| 2173 | auio.uio_iovcnt = 1; |
| 2174 | auio.uio_offset = 0; |
| 2175 | auio.uio_rw = UIO_READ; |
| 2176 | auio.uio_segflg = UIO_USERSPACE; |
| 2177 | auio.uio_procp = p; |
| 2178 | auio.uio_resid = count; |
| 2179 | error = VOP_READLINK(vp, &auio, p->p_ucred); |
| 2180 | *retval = count - auio.uio_resid; |
| 2181 | } |
| 2182 | vput(vp); |
| 2183 | return (error); |
| 2184 | } |
| 2185 | |
| 2186 | /* |
| 2187 | * Change flags of a file given a path name. |
| 2188 | */ |
| 2189 | int |
| 2190 | sys_chflags(struct proc *p, void *v, register_t *retval) |
| 2191 | { |
| 2192 | struct sys_chflags_args /* { |
| 2193 | syscallarg(const char *) path; |
| 2194 | syscallarg(u_int) flags; |
| 2195 | } */ *uap = v; |
| 2196 | |
| 2197 | return (dochflagsat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), |
| 2198 | SCARG(uap, flags)((uap)->flags.le.datum), 0)); |
| 2199 | } |
| 2200 | |
| 2201 | int |
| 2202 | sys_chflagsat(struct proc *p, void *v, register_t *retval) |
| 2203 | { |
| 2204 | struct sys_chflagsat_args /* { |
| 2205 | syscallarg(int) fd; |
| 2206 | syscallarg(const char *) path; |
| 2207 | syscallarg(u_int) flags; |
| 2208 | syscallarg(int) atflags; |
| 2209 | } */ *uap = v; |
| 2210 | |
| 2211 | return (dochflagsat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 2212 | SCARG(uap, flags)((uap)->flags.le.datum), SCARG(uap, atflags)((uap)->atflags.le.datum))); |
| 2213 | } |
| 2214 | |
| 2215 | int |
| 2216 | dochflagsat(struct proc *p, int fd, const char *path, u_int flags, int atflags) |
| 2217 | { |
| 2218 | struct nameidata nd; |
| 2219 | int error, follow; |
| 2220 | |
| 2221 | if (atflags & ~AT_SYMLINK_NOFOLLOW0x02) |
| 2222 | return (EINVAL22); |
| 2223 | |
| 2224 | follow = (atflags & AT_SYMLINK_NOFOLLOW0x02) ? NOFOLLOW0x0000 : FOLLOW0x0040; |
| 2225 | NDINITAT(&nd, LOOKUP, follow, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, follow, UIO_USERSPACE, fd, path, p); |
| 2226 | nd.ni_pledge = PLEDGE_FATTR0x0000000000004000ULL | PLEDGE_RPATH0x0000000000000001ULL; |
| 2227 | nd.ni_unveil = UNVEIL_WRITE0x02; |
| 2228 | if ((error = namei(&nd)) != 0) |
| 2229 | return (error); |
| 2230 | return (dovchflags(p, nd.ni_vp, flags)); |
| 2231 | } |
| 2232 | |
| 2233 | /* |
| 2234 | * Change flags of a file given a file descriptor. |
| 2235 | */ |
| 2236 | int |
| 2237 | sys_fchflags(struct proc *p, void *v, register_t *retval) |
| 2238 | { |
| 2239 | struct sys_fchflags_args /* { |
| 2240 | syscallarg(int) fd; |
| 2241 | syscallarg(u_int) flags; |
| 2242 | } */ *uap = v; |
| 2243 | struct file *fp; |
| 2244 | struct vnode *vp; |
| 2245 | int error; |
| 2246 | |
| 2247 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 2248 | return (error); |
| 2249 | vp = fp->f_data; |
| 2250 | vref(vp); |
| 2251 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 2252 | return (dovchflags(p, vp, SCARG(uap, flags)((uap)->flags.le.datum))); |
| 2253 | } |
| 2254 | |
| 2255 | int |
| 2256 | dovchflags(struct proc *p, struct vnode *vp, u_int flags) |
| 2257 | { |
| 2258 | struct vattr vattr; |
| 2259 | int error; |
| 2260 | |
| 2261 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2262 | if (vp->v_mount && vp->v_mount->mnt_flag & MNT_RDONLY0x00000001) |
| 2263 | error = EROFS30; |
| 2264 | else if (flags == VNOVAL(-1)) |
| 2265 | error = EINVAL22; |
| 2266 | else { |
| 2267 | if (suser(p)) { |
| 2268 | if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) |
| 2269 | != 0) |
| 2270 | goto out; |
| 2271 | if (vattr.va_type == VCHR || vattr.va_type == VBLK) { |
| 2272 | error = EINVAL22; |
| 2273 | goto out; |
| 2274 | } |
| 2275 | } |
| 2276 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2277 | vattr.va_flags = flags; |
| 2278 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2279 | } |
| 2280 | out: |
| 2281 | vput(vp); |
| 2282 | return (error); |
| 2283 | } |
| 2284 | |
| 2285 | /* |
| 2286 | * Change mode of a file given path name. |
| 2287 | */ |
| 2288 | int |
| 2289 | sys_chmod(struct proc *p, void *v, register_t *retval) |
| 2290 | { |
| 2291 | struct sys_chmod_args /* { |
| 2292 | syscallarg(const char *) path; |
| 2293 | syscallarg(mode_t) mode; |
| 2294 | } */ *uap = v; |
| 2295 | |
| 2296 | return (dofchmodat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, mode)((uap)->mode.le.datum), 0)); |
| 2297 | } |
| 2298 | |
| 2299 | int |
| 2300 | sys_fchmodat(struct proc *p, void *v, register_t *retval) |
| 2301 | { |
| 2302 | struct sys_fchmodat_args /* { |
| 2303 | syscallarg(int) fd; |
| 2304 | syscallarg(const char *) path; |
| 2305 | syscallarg(mode_t) mode; |
| 2306 | syscallarg(int) flag; |
| 2307 | } */ *uap = v; |
| 2308 | |
| 2309 | return (dofchmodat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 2310 | SCARG(uap, mode)((uap)->mode.le.datum), SCARG(uap, flag)((uap)->flag.le.datum))); |
| 2311 | } |
| 2312 | |
| 2313 | int |
| 2314 | dofchmodat(struct proc *p, int fd, const char *path, mode_t mode, int flag) |
| 2315 | { |
| 2316 | struct vnode *vp; |
| 2317 | struct vattr vattr; |
| 2318 | int error, follow; |
| 2319 | struct nameidata nd; |
| 2320 | |
| 2321 | if (mode & ~(S_IFMT0170000 | ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007))) |
| 2322 | return (EINVAL22); |
| 2323 | if ((p->p_p->ps_flags & PS_PLEDGE0x00100000)) |
| 2324 | mode &= ACCESSPERMS(0000700|0000070|0000007); |
| 2325 | if (flag & ~AT_SYMLINK_NOFOLLOW0x02) |
| 2326 | return (EINVAL22); |
| 2327 | |
| 2328 | follow = (flag & AT_SYMLINK_NOFOLLOW0x02) ? NOFOLLOW0x0000 : FOLLOW0x0040; |
| 2329 | NDINITAT(&nd, LOOKUP, follow, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, follow, UIO_USERSPACE, fd, path, p); |
| 2330 | nd.ni_pledge = PLEDGE_FATTR0x0000000000004000ULL | PLEDGE_RPATH0x0000000000000001ULL; |
| 2331 | nd.ni_unveil = UNVEIL_WRITE0x02; |
| 2332 | if ((error = namei(&nd)) != 0) |
| 2333 | return (error); |
| 2334 | vp = nd.ni_vp; |
| 2335 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2336 | if (vp->v_mount->mnt_flag & MNT_RDONLY0x00000001) |
| 2337 | error = EROFS30; |
| 2338 | else { |
| 2339 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2340 | vattr.va_mode = mode & ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007); |
| 2341 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2342 | } |
| 2343 | vput(vp); |
| 2344 | return (error); |
| 2345 | } |
| 2346 | |
| 2347 | /* |
| 2348 | * Change mode of a file given a file descriptor. |
| 2349 | */ |
| 2350 | int |
| 2351 | sys_fchmod(struct proc *p, void *v, register_t *retval) |
| 2352 | { |
| 2353 | struct sys_fchmod_args /* { |
| 2354 | syscallarg(int) fd; |
| 2355 | syscallarg(mode_t) mode; |
| 2356 | } */ *uap = v; |
| 2357 | struct vattr vattr; |
| 2358 | struct vnode *vp; |
| 2359 | struct file *fp; |
| 2360 | mode_t mode = SCARG(uap, mode)((uap)->mode.le.datum); |
| 2361 | int error; |
| 2362 | |
| 2363 | if (mode & ~(S_IFMT0170000 | ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007))) |
| 2364 | return (EINVAL22); |
| 2365 | if ((p->p_p->ps_flags & PS_PLEDGE0x00100000)) |
| 2366 | mode &= ACCESSPERMS(0000700|0000070|0000007); |
| 2367 | |
| 2368 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 2369 | return (error); |
| 2370 | vp = fp->f_data; |
| 2371 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2372 | if (vp->v_mount && vp->v_mount->mnt_flag & MNT_RDONLY0x00000001) |
| 2373 | error = EROFS30; |
| 2374 | else { |
| 2375 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2376 | vattr.va_mode = mode & ALLPERMS(0004000|0002000|0001000|0000700|0000070|0000007); |
| 2377 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2378 | } |
| 2379 | VOP_UNLOCK(vp); |
| 2380 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 2381 | return (error); |
| 2382 | } |
| 2383 | |
| 2384 | /* |
| 2385 | * Set ownership given a path name. |
| 2386 | */ |
| 2387 | int |
| 2388 | sys_chown(struct proc *p, void *v, register_t *retval) |
| 2389 | { |
| 2390 | struct sys_chown_args /* { |
| 2391 | syscallarg(const char *) path; |
| 2392 | syscallarg(uid_t) uid; |
| 2393 | syscallarg(gid_t) gid; |
| 2394 | } */ *uap = v; |
| 2395 | |
| 2396 | return (dofchownat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, uid)((uap)->uid.le.datum), |
| 2397 | SCARG(uap, gid)((uap)->gid.le.datum), 0)); |
| 2398 | } |
| 2399 | |
| 2400 | int |
| 2401 | sys_fchownat(struct proc *p, void *v, register_t *retval) |
| 2402 | { |
| 2403 | struct sys_fchownat_args /* { |
| 2404 | syscallarg(int) fd; |
| 2405 | syscallarg(const char *) path; |
| 2406 | syscallarg(uid_t) uid; |
| 2407 | syscallarg(gid_t) gid; |
| 2408 | syscallarg(int) flag; |
| 2409 | } */ *uap = v; |
| 2410 | |
| 2411 | return (dofchownat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 2412 | SCARG(uap, uid)((uap)->uid.le.datum), SCARG(uap, gid)((uap)->gid.le.datum), SCARG(uap, flag)((uap)->flag.le.datum))); |
| 2413 | } |
| 2414 | |
| 2415 | int |
| 2416 | dofchownat(struct proc *p, int fd, const char *path, uid_t uid, gid_t gid, |
| 2417 | int flag) |
| 2418 | { |
| 2419 | struct vnode *vp; |
| 2420 | struct vattr vattr; |
| 2421 | int error, follow; |
| 2422 | struct nameidata nd; |
| 2423 | mode_t mode; |
| 2424 | |
| 2425 | if (flag & ~AT_SYMLINK_NOFOLLOW0x02) |
| 2426 | return (EINVAL22); |
| 2427 | |
| 2428 | follow = (flag & AT_SYMLINK_NOFOLLOW0x02) ? NOFOLLOW0x0000 : FOLLOW0x0040; |
| 2429 | NDINITAT(&nd, LOOKUP, follow, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, follow, UIO_USERSPACE, fd, path, p); |
| 2430 | nd.ni_pledge = PLEDGE_CHOWN0x0000000080000000ULL | PLEDGE_RPATH0x0000000000000001ULL; |
| 2431 | nd.ni_unveil = UNVEIL_WRITE0x02; |
| 2432 | if ((error = namei(&nd)) != 0) |
| 2433 | return (error); |
| 2434 | vp = nd.ni_vp; |
| 2435 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2436 | if (vp->v_mount->mnt_flag & MNT_RDONLY0x00000001) |
| 2437 | error = EROFS30; |
| 2438 | else { |
| 2439 | if ((error = pledge_chown(p, uid, gid))) |
| 2440 | goto out; |
| 2441 | if ((uid != -1 || gid != -1) && |
| 2442 | !vnoperm(vp) && |
| 2443 | (suser(p) || suid_clear)) { |
| 2444 | error = VOP_GETATTR(vp, &vattr, p->p_ucred, p); |
| 2445 | if (error) |
| 2446 | goto out; |
| 2447 | mode = vattr.va_mode & ~(VSUID04000 | VSGID02000); |
| 2448 | if (mode == vattr.va_mode) |
| 2449 | mode = VNOVAL(-1); |
| 2450 | } else |
| 2451 | mode = VNOVAL(-1); |
| 2452 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2453 | vattr.va_uid = uid; |
| 2454 | vattr.va_gid = gid; |
| 2455 | vattr.va_mode = mode; |
| 2456 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2457 | } |
| 2458 | out: |
| 2459 | vput(vp); |
| 2460 | return (error); |
| 2461 | } |
| 2462 | |
| 2463 | /* |
| 2464 | * Set ownership given a path name, without following links. |
| 2465 | */ |
| 2466 | int |
| 2467 | sys_lchown(struct proc *p, void *v, register_t *retval) |
| 2468 | { |
| 2469 | struct sys_lchown_args /* { |
| 2470 | syscallarg(const char *) path; |
| 2471 | syscallarg(uid_t) uid; |
| 2472 | syscallarg(gid_t) gid; |
| 2473 | } */ *uap = v; |
| 2474 | struct vnode *vp; |
| 2475 | struct vattr vattr; |
| 2476 | int error; |
| 2477 | struct nameidata nd; |
| 2478 | mode_t mode; |
| 2479 | uid_t uid = SCARG(uap, uid)((uap)->uid.le.datum); |
| 2480 | gid_t gid = SCARG(uap, gid)((uap)->gid.le.datum); |
| 2481 | |
| 2482 | NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p)ndinitat(&nd, 0, 0x0000, UIO_USERSPACE, -100, ((uap)-> path.le.datum), p); |
| 2483 | nd.ni_pledge = PLEDGE_CHOWN0x0000000080000000ULL | PLEDGE_RPATH0x0000000000000001ULL; |
| 2484 | nd.ni_unveil = UNVEIL_WRITE0x02; |
| 2485 | if ((error = namei(&nd)) != 0) |
| 2486 | return (error); |
| 2487 | vp = nd.ni_vp; |
| 2488 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2489 | if (vp->v_mount->mnt_flag & MNT_RDONLY0x00000001) |
| 2490 | error = EROFS30; |
| 2491 | else { |
| 2492 | if ((error = pledge_chown(p, uid, gid))) |
| 2493 | goto out; |
| 2494 | if ((uid != -1 || gid != -1) && |
| 2495 | !vnoperm(vp) && |
| 2496 | (suser(p) || suid_clear)) { |
| 2497 | error = VOP_GETATTR(vp, &vattr, p->p_ucred, p); |
| 2498 | if (error) |
| 2499 | goto out; |
| 2500 | mode = vattr.va_mode & ~(VSUID04000 | VSGID02000); |
| 2501 | if (mode == vattr.va_mode) |
| 2502 | mode = VNOVAL(-1); |
| 2503 | } else |
| 2504 | mode = VNOVAL(-1); |
| 2505 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2506 | vattr.va_uid = uid; |
| 2507 | vattr.va_gid = gid; |
| 2508 | vattr.va_mode = mode; |
| 2509 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2510 | } |
| 2511 | out: |
| 2512 | vput(vp); |
| 2513 | return (error); |
| 2514 | } |
| 2515 | |
| 2516 | /* |
| 2517 | * Set ownership given a file descriptor. |
| 2518 | */ |
| 2519 | int |
| 2520 | sys_fchown(struct proc *p, void *v, register_t *retval) |
| 2521 | { |
| 2522 | struct sys_fchown_args /* { |
| 2523 | syscallarg(int) fd; |
| 2524 | syscallarg(uid_t) uid; |
| 2525 | syscallarg(gid_t) gid; |
| 2526 | } */ *uap = v; |
| 2527 | struct vnode *vp; |
| 2528 | struct vattr vattr; |
| 2529 | int error; |
| 2530 | struct file *fp; |
| 2531 | mode_t mode; |
| 2532 | uid_t uid = SCARG(uap, uid)((uap)->uid.le.datum); |
| 2533 | gid_t gid = SCARG(uap, gid)((uap)->gid.le.datum); |
| 2534 | |
| 2535 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 2536 | return (error); |
| 2537 | vp = fp->f_data; |
| 2538 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2539 | if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_RDONLY0x00000001)) |
| 2540 | error = EROFS30; |
| 2541 | else { |
| 2542 | if ((error = pledge_chown(p, uid, gid))) |
| 2543 | goto out; |
| 2544 | if ((uid != -1 || gid != -1) && |
| 2545 | !vnoperm(vp) && |
| 2546 | (suser(p) || suid_clear)) { |
| 2547 | error = VOP_GETATTR(vp, &vattr, p->p_ucred, p); |
| 2548 | if (error) |
| 2549 | goto out; |
| 2550 | mode = vattr.va_mode & ~(VSUID04000 | VSGID02000); |
| 2551 | if (mode == vattr.va_mode) |
| 2552 | mode = VNOVAL(-1); |
| 2553 | } else |
| 2554 | mode = VNOVAL(-1); |
| 2555 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2556 | vattr.va_uid = uid; |
| 2557 | vattr.va_gid = gid; |
| 2558 | vattr.va_mode = mode; |
| 2559 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2560 | } |
| 2561 | out: |
| 2562 | VOP_UNLOCK(vp); |
| 2563 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 2564 | return (error); |
| 2565 | } |
| 2566 | |
| 2567 | /* |
| 2568 | * Set the access and modification times given a path name. |
| 2569 | */ |
| 2570 | int |
| 2571 | sys_utimes(struct proc *p, void *v, register_t *retval) |
| 2572 | { |
| 2573 | struct sys_utimes_args /* { |
| 2574 | syscallarg(const char *) path; |
| 2575 | syscallarg(const struct timeval *) tptr; |
| 2576 | } */ *uap = v; |
| 2577 | |
| 2578 | struct timespec ts[2]; |
| 2579 | struct timeval tv[2]; |
| 2580 | const struct timeval *tvp; |
| 2581 | int error; |
| 2582 | |
| 2583 | tvp = SCARG(uap, tptr)((uap)->tptr.le.datum); |
| 2584 | if (tvp != NULL((void *)0)) { |
| 2585 | error = copyin(tvp, tv, sizeof(tv)); |
| 2586 | if (error) |
| 2587 | return (error); |
| 2588 | #ifdef KTRACE1 |
| 2589 | if (KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) |
| 2590 | ktrabstimeval(p, &tv)ktrstruct((p), "abstimeval", (&tv), sizeof(struct timeval )); |
| 2591 | #endif |
| 2592 | if (!timerisvalid(&tv[0])((&tv[0])->tv_usec >= 0 && (&tv[0])-> tv_usec < 1000000) || !timerisvalid(&tv[1])((&tv[1])->tv_usec >= 0 && (&tv[1])-> tv_usec < 1000000)) |
| 2593 | return (EINVAL22); |
| 2594 | TIMEVAL_TO_TIMESPEC(&tv[0], &ts[0])do { (&ts[0])->tv_sec = (&tv[0])->tv_sec; (& ts[0])->tv_nsec = (&tv[0])->tv_usec * 1000; } while (0); |
| 2595 | TIMEVAL_TO_TIMESPEC(&tv[1], &ts[1])do { (&ts[1])->tv_sec = (&tv[1])->tv_sec; (& ts[1])->tv_nsec = (&tv[1])->tv_usec * 1000; } while (0); |
| 2596 | } else |
| 2597 | ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW-2L; |
| 2598 | |
| 2599 | return (doutimensat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), ts, 0)); |
| 2600 | } |
| 2601 | |
| 2602 | int |
| 2603 | sys_utimensat(struct proc *p, void *v, register_t *retval) |
| 2604 | { |
| 2605 | struct sys_utimensat_args /* { |
| 2606 | syscallarg(int) fd; |
| 2607 | syscallarg(const char *) path; |
| 2608 | syscallarg(const struct timespec *) times; |
| 2609 | syscallarg(int) flag; |
| 2610 | } */ *uap = v; |
| 2611 | |
| 2612 | struct timespec ts[2]; |
| 2613 | const struct timespec *tsp; |
| 2614 | int error, i; |
| 2615 | |
| 2616 | tsp = SCARG(uap, times)((uap)->times.le.datum); |
| 2617 | if (tsp != NULL((void *)0)) { |
| 2618 | error = copyin(tsp, ts, sizeof(ts)); |
| 2619 | if (error) |
| 2620 | return (error); |
| 2621 | for (i = 0; i < nitems(ts)(sizeof((ts)) / sizeof((ts)[0])); i++) { |
| 2622 | if (ts[i].tv_nsec == UTIME_NOW-2L) |
| 2623 | continue; |
| 2624 | if (ts[i].tv_nsec == UTIME_OMIT-1L) |
| 2625 | continue; |
| 2626 | #ifdef KTRACE1 |
| 2627 | if (KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) |
| 2628 | ktrabstimespec(p, &ts[i])ktrstruct((p), "abstimespec", (&ts[i]), sizeof(struct timespec )); |
| 2629 | #endif |
| 2630 | if (!timespecisvalid(&ts[i])((&ts[i])->tv_nsec >= 0 && (&ts[i])-> tv_nsec < 1000000000L)) |
| 2631 | return (EINVAL22); |
| 2632 | } |
| 2633 | } else |
| 2634 | ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW-2L; |
| 2635 | |
| 2636 | return (doutimensat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), ts, |
| 2637 | SCARG(uap, flag)((uap)->flag.le.datum))); |
| 2638 | } |
| 2639 | |
| 2640 | int |
| 2641 | doutimensat(struct proc *p, int fd, const char *path, |
| 2642 | struct timespec ts[2], int flag) |
| 2643 | { |
| 2644 | struct vnode *vp; |
| 2645 | int error, follow; |
| 2646 | struct nameidata nd; |
| 2647 | |
| 2648 | if (flag & ~AT_SYMLINK_NOFOLLOW0x02) |
| 2649 | return (EINVAL22); |
| 2650 | |
| 2651 | follow = (flag & AT_SYMLINK_NOFOLLOW0x02) ? NOFOLLOW0x0000 : FOLLOW0x0040; |
| 2652 | NDINITAT(&nd, LOOKUP, follow, UIO_USERSPACE, fd, path, p)ndinitat(&nd, 0, follow, UIO_USERSPACE, fd, path, p); |
| 2653 | nd.ni_pledge = PLEDGE_FATTR0x0000000000004000ULL | PLEDGE_RPATH0x0000000000000001ULL; |
| 2654 | nd.ni_unveil = UNVEIL_WRITE0x02; |
| 2655 | if ((error = namei(&nd)) != 0) |
| 2656 | return (error); |
| 2657 | vp = nd.ni_vp; |
| 2658 | |
| 2659 | return (dovutimens(p, vp, ts)); |
| 2660 | } |
| 2661 | |
| 2662 | int |
| 2663 | dovutimens(struct proc *p, struct vnode *vp, struct timespec ts[2]) |
| 2664 | { |
| 2665 | struct vattr vattr; |
| 2666 | struct timespec now; |
| 2667 | int error; |
| 2668 | |
| 2669 | #ifdef KTRACE1 |
| 2670 | /* if they're both UTIME_NOW, then don't report either */ |
| 2671 | if ((ts[0].tv_nsec != UTIME_NOW-2L || ts[1].tv_nsec != UTIME_NOW-2L) && |
| 2672 | KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) { |
| 2673 | ktrabstimespec(p, &ts[0])ktrstruct((p), "abstimespec", (&ts[0]), sizeof(struct timespec )); |
| 2674 | ktrabstimespec(p, &ts[1])ktrstruct((p), "abstimespec", (&ts[1]), sizeof(struct timespec )); |
| 2675 | } |
| 2676 | #endif |
| 2677 | |
| 2678 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2679 | |
| 2680 | /* make sure ctime is updated even if neither mtime nor atime is */ |
| 2681 | vattr.va_vaflags = VA_UTIMES_CHANGE0x04; |
| 2682 | |
| 2683 | if (ts[0].tv_nsec == UTIME_NOW-2L || ts[1].tv_nsec == UTIME_NOW-2L) { |
| 2684 | if (ts[0].tv_nsec == UTIME_NOW-2L && ts[1].tv_nsec == UTIME_NOW-2L) |
| 2685 | vattr.va_vaflags |= VA_UTIMES_NULL0x01; |
| 2686 | |
| 2687 | getnanotime(&now); |
| 2688 | if (ts[0].tv_nsec == UTIME_NOW-2L) |
| 2689 | ts[0] = now; |
| 2690 | if (ts[1].tv_nsec == UTIME_NOW-2L) |
| 2691 | ts[1] = now; |
| 2692 | } |
| 2693 | |
| 2694 | if (ts[0].tv_nsec != UTIME_OMIT-1L) |
| 2695 | vattr.va_atime = ts[0]; |
| 2696 | if (ts[1].tv_nsec != UTIME_OMIT-1L) |
| 2697 | vattr.va_mtime = ts[1]; |
| 2698 | |
| 2699 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2700 | if (vp->v_mount->mnt_flag & MNT_RDONLY0x00000001) |
| 2701 | error = EROFS30; |
| 2702 | else |
| 2703 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2704 | vput(vp); |
| 2705 | return (error); |
| 2706 | } |
| 2707 | |
| 2708 | /* |
| 2709 | * Set the access and modification times given a file descriptor. |
| 2710 | */ |
| 2711 | int |
| 2712 | sys_futimes(struct proc *p, void *v, register_t *retval) |
| 2713 | { |
| 2714 | struct sys_futimes_args /* { |
| 2715 | syscallarg(int) fd; |
| 2716 | syscallarg(const struct timeval *) tptr; |
| 2717 | } */ *uap = v; |
| 2718 | struct timeval tv[2]; |
| 2719 | struct timespec ts[2]; |
| 2720 | const struct timeval *tvp; |
| 2721 | int error; |
| 2722 | |
| 2723 | tvp = SCARG(uap, tptr)((uap)->tptr.le.datum); |
| 2724 | if (tvp != NULL((void *)0)) { |
| 2725 | error = copyin(tvp, tv, sizeof(tv)); |
| 2726 | if (error) |
| 2727 | return (error); |
| 2728 | #ifdef KTRACE1 |
| 2729 | if (KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) { |
| 2730 | ktrabstimeval(p, &tv[0])ktrstruct((p), "abstimeval", (&tv[0]), sizeof(struct timeval )); |
| 2731 | ktrabstimeval(p, &tv[1])ktrstruct((p), "abstimeval", (&tv[1]), sizeof(struct timeval )); |
| 2732 | } |
| 2733 | #endif |
| 2734 | if (!timerisvalid(&tv[0])((&tv[0])->tv_usec >= 0 && (&tv[0])-> tv_usec < 1000000) || !timerisvalid(&tv[1])((&tv[1])->tv_usec >= 0 && (&tv[1])-> tv_usec < 1000000)) |
| 2735 | return (EINVAL22); |
| 2736 | TIMEVAL_TO_TIMESPEC(&tv[0], &ts[0])do { (&ts[0])->tv_sec = (&tv[0])->tv_sec; (& ts[0])->tv_nsec = (&tv[0])->tv_usec * 1000; } while (0); |
| 2737 | TIMEVAL_TO_TIMESPEC(&tv[1], &ts[1])do { (&ts[1])->tv_sec = (&tv[1])->tv_sec; (& ts[1])->tv_nsec = (&tv[1])->tv_usec * 1000; } while (0); |
| 2738 | } else |
| 2739 | ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW-2L; |
| 2740 | |
| 2741 | return (dofutimens(p, SCARG(uap, fd)((uap)->fd.le.datum), ts)); |
| 2742 | } |
| 2743 | |
| 2744 | int |
| 2745 | sys_futimens(struct proc *p, void *v, register_t *retval) |
| 2746 | { |
| 2747 | struct sys_futimens_args /* { |
| 2748 | syscallarg(int) fd; |
| 2749 | syscallarg(const struct timespec *) times; |
| 2750 | } */ *uap = v; |
| 2751 | struct timespec ts[2]; |
| 2752 | const struct timespec *tsp; |
| 2753 | int error, i; |
| 2754 | |
| 2755 | tsp = SCARG(uap, times)((uap)->times.le.datum); |
| 2756 | if (tsp != NULL((void *)0)) { |
| 2757 | error = copyin(tsp, ts, sizeof(ts)); |
| 2758 | if (error) |
| 2759 | return (error); |
| 2760 | for (i = 0; i < nitems(ts)(sizeof((ts)) / sizeof((ts)[0])); i++) { |
| 2761 | if (ts[i].tv_nsec == UTIME_NOW-2L) |
| 2762 | continue; |
| 2763 | if (ts[i].tv_nsec == UTIME_OMIT-1L) |
| 2764 | continue; |
| 2765 | #ifdef KTRACE1 |
| 2766 | if (KTRPOINT(p, KTR_STRUCT)((p)->p_p->ps_traceflag & (1<<(8)) && ((p)->p_flag & 0x00000001) == 0)) |
| 2767 | ktrabstimespec(p, &ts[i])ktrstruct((p), "abstimespec", (&ts[i]), sizeof(struct timespec )); |
| 2768 | #endif |
| 2769 | if (!timespecisvalid(&ts[i])((&ts[i])->tv_nsec >= 0 && (&ts[i])-> tv_nsec < 1000000000L)) |
| 2770 | return (EINVAL22); |
| 2771 | } |
| 2772 | } else |
| 2773 | ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW-2L; |
| 2774 | |
| 2775 | return (dofutimens(p, SCARG(uap, fd)((uap)->fd.le.datum), ts)); |
| 2776 | } |
| 2777 | |
| 2778 | int |
| 2779 | dofutimens(struct proc *p, int fd, struct timespec ts[2]) |
| 2780 | { |
| 2781 | struct file *fp; |
| 2782 | struct vnode *vp; |
| 2783 | int error; |
| 2784 | |
| 2785 | if ((error = getvnode(p, fd, &fp)) != 0) |
| 2786 | return (error); |
| 2787 | vp = fp->f_data; |
| 2788 | vref(vp); |
| 2789 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 2790 | |
| 2791 | return (dovutimens(p, vp, ts)); |
| 2792 | } |
| 2793 | |
| 2794 | /* |
| 2795 | * Truncate a file given a vnode. |
| 2796 | */ |
| 2797 | int |
| 2798 | dotruncate(struct proc *p, struct vnode *vp, off_t len) |
| 2799 | { |
| 2800 | struct vattr vattr; |
| 2801 | int error; |
| 2802 | |
| 2803 | if (len < 0) |
| 2804 | return EINVAL22; |
| 2805 | if (vp->v_type == VDIR) |
| 2806 | return EISDIR21; |
| 2807 | if ((error = vn_writechk(vp)) != 0) |
| 2808 | return error; |
| 2809 | if (vp->v_type == VREG && len > lim_cur_proc(p, RLIMIT_FSIZE1)) { |
| 2810 | if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) |
| 2811 | return error; |
| 2812 | if (len > vattr.va_size) { |
| 2813 | /* if extending over the limit, send signal and fail */ |
| 2814 | psignal(p, SIGXFSZ25); |
| 2815 | return EFBIG27; |
| 2816 | } |
| 2817 | } |
| 2818 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 2819 | vattr.va_size = len; |
| 2820 | return VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 2821 | } |
| 2822 | |
| 2823 | /* |
| 2824 | * Truncate a file given its path name. |
| 2825 | */ |
| 2826 | int |
| 2827 | sys_truncate(struct proc *p, void *v, register_t *retval) |
| 2828 | { |
| 2829 | struct sys_truncate_args /* { |
| 2830 | syscallarg(const char *) path; |
| 2831 | syscallarg(off_t) length; |
| 2832 | } */ *uap = v; |
| 2833 | struct vnode *vp; |
| 2834 | int error; |
| 2835 | struct nameidata nd; |
| 2836 | |
| 2837 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040, UIO_USERSPACE, -100, ((uap)-> path.le.datum), p); |
| 2838 | nd.ni_pledge = PLEDGE_FATTR0x0000000000004000ULL | PLEDGE_RPATH0x0000000000000001ULL; |
| 2839 | nd.ni_unveil = UNVEIL_WRITE0x02; |
| 2840 | if ((error = namei(&nd)) != 0) |
| 2841 | return (error); |
| 2842 | vp = nd.ni_vp; |
| 2843 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2844 | if ((error = VOP_ACCESS(vp, VWRITE00200, p->p_ucred, p)) == 0) |
| 2845 | error = dotruncate(p, vp, SCARG(uap, length)((uap)->length.le.datum)); |
| 2846 | vput(vp); |
| 2847 | return (error); |
| 2848 | } |
| 2849 | |
| 2850 | /* |
| 2851 | * Truncate a file given a file descriptor. |
| 2852 | */ |
| 2853 | int |
| 2854 | sys_ftruncate(struct proc *p, void *v, register_t *retval) |
| 2855 | { |
| 2856 | struct sys_ftruncate_args /* { |
| 2857 | syscallarg(int) fd; |
| 2858 | syscallarg(off_t) length; |
| 2859 | } */ *uap = v; |
| 2860 | struct vnode *vp; |
| 2861 | struct file *fp; |
| 2862 | int error; |
| 2863 | |
| 2864 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 2865 | return (error); |
| 2866 | if ((fp->f_flag & FWRITE0x0002) == 0) { |
| 2867 | error = EINVAL22; |
| 2868 | goto bad; |
| 2869 | } |
| 2870 | vp = fp->f_data; |
| 2871 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2872 | error = dotruncate(p, vp, SCARG(uap, length)((uap)->length.le.datum)); |
| 2873 | VOP_UNLOCK(vp); |
| 2874 | bad: |
| 2875 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 2876 | return (error); |
| 2877 | } |
| 2878 | |
| 2879 | /* |
| 2880 | * Sync an open file. |
| 2881 | */ |
| 2882 | int |
| 2883 | sys_fsync(struct proc *p, void *v, register_t *retval) |
| 2884 | { |
| 2885 | struct sys_fsync_args /* { |
| 2886 | syscallarg(int) fd; |
| 2887 | } */ *uap = v; |
| 2888 | struct vnode *vp; |
| 2889 | struct file *fp; |
| 2890 | int error; |
| 2891 | |
| 2892 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 2893 | return (error); |
| 2894 | vp = fp->f_data; |
| 2895 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 2896 | error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT1, p); |
| 2897 | #ifdef FFS_SOFTUPDATES1 |
| 2898 | if (error == 0 && vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP0x04000000)) |
| 2899 | error = softdep_fsync(vp); |
| 2900 | #endif |
| 2901 | |
| 2902 | VOP_UNLOCK(vp); |
| 2903 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 2904 | return (error); |
| 2905 | } |
| 2906 | |
| 2907 | /* |
| 2908 | * Rename files. Source and destination must either both be directories, |
| 2909 | * or both not be directories. If target is a directory, it must be empty. |
| 2910 | */ |
| 2911 | int |
| 2912 | sys_rename(struct proc *p, void *v, register_t *retval) |
| 2913 | { |
| 2914 | struct sys_rename_args /* { |
| 2915 | syscallarg(const char *) from; |
| 2916 | syscallarg(const char *) to; |
| 2917 | } */ *uap = v; |
| 2918 | |
| 2919 | return (dorenameat(p, AT_FDCWD-100, SCARG(uap, from)((uap)->from.le.datum), AT_FDCWD-100, |
| 2920 | SCARG(uap, to)((uap)->to.le.datum))); |
| 2921 | } |
| 2922 | |
| 2923 | int |
| 2924 | sys_renameat(struct proc *p, void *v, register_t *retval) |
| 2925 | { |
| 2926 | struct sys_renameat_args /* { |
| 2927 | syscallarg(int) fromfd; |
| 2928 | syscallarg(const char *) from; |
| 2929 | syscallarg(int) tofd; |
| 2930 | syscallarg(const char *) to; |
| 2931 | } */ *uap = v; |
| 2932 | |
| 2933 | return (dorenameat(p, SCARG(uap, fromfd)((uap)->fromfd.le.datum), SCARG(uap, from)((uap)->from.le.datum), |
| 2934 | SCARG(uap, tofd)((uap)->tofd.le.datum), SCARG(uap, to)((uap)->to.le.datum))); |
| 2935 | } |
| 2936 | |
| 2937 | int |
| 2938 | dorenameat(struct proc *p, int fromfd, const char *from, int tofd, |
| 2939 | const char *to) |
| 2940 | { |
| 2941 | struct vnode *tvp, *fvp, *tdvp; |
| 2942 | struct nameidata fromnd, tond; |
| 2943 | int error; |
| 2944 | int flags; |
| 2945 | |
| 2946 | NDINITAT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,ndinitat(&fromnd, 2, 0x0010 | 0x001000, UIO_USERSPACE, fromfd , from, p) |
| 2947 | fromfd, from, p)ndinitat(&fromnd, 2, 0x0010 | 0x001000, UIO_USERSPACE, fromfd , from, p); |
| 2948 | fromnd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL | PLEDGE_CPATH0x0000000000000004ULL; |
| 2949 | fromnd.ni_unveil = UNVEIL_READ0x01 | UNVEIL_CREATE0x04; |
| 2950 | if ((error = namei(&fromnd)) != 0) |
| 2951 | return (error); |
| 2952 | fvp = fromnd.ni_vp; |
| 2953 | |
| 2954 | flags = LOCKPARENT0x0008 | LOCKLEAF0x0004 | NOCACHE0x0020 | SAVESTART0x001000; |
| 2955 | /* |
| 2956 | * rename("foo/", "bar/"); is OK |
| 2957 | */ |
| 2958 | if (fvp->v_type == VDIR) |
| 2959 | flags |= STRIPSLASHES0x100000; |
| 2960 | |
| 2961 | NDINITAT(&tond, RENAME, flags, UIO_USERSPACE, tofd, to, p)ndinitat(&tond, 3, flags, UIO_USERSPACE, tofd, to, p); |
| 2962 | tond.ni_pledge = PLEDGE_CPATH0x0000000000000004ULL; |
| 2963 | tond.ni_unveil = UNVEIL_CREATE0x04; |
| 2964 | if ((error = namei(&tond)) != 0) { |
| 2965 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 2966 | vrele(fromnd.ni_dvp); |
| 2967 | vrele(fvp); |
| 2968 | goto out1; |
| 2969 | } |
| 2970 | tdvp = tond.ni_dvp; |
| 2971 | tvp = tond.ni_vp; |
| 2972 | if (tvp != NULL((void *)0)) { |
| 2973 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { |
| 2974 | error = ENOTDIR20; |
| 2975 | goto out; |
| 2976 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { |
| 2977 | error = EISDIR21; |
| 2978 | goto out; |
| 2979 | } |
| 2980 | } |
| 2981 | if (fvp == tdvp) |
| 2982 | error = EINVAL22; |
| 2983 | /* |
| 2984 | * If source is the same as the destination (that is the |
| 2985 | * same inode number) |
| 2986 | */ |
| 2987 | if (fvp == tvp) |
| 2988 | error = -1; |
| 2989 | out: |
| 2990 | if (!error) { |
| 2991 | if (tvp) { |
| 2992 | (void)uvm_vnp_uncache(tvp); |
| 2993 | } |
| 2994 | error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, |
| 2995 | tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); |
| 2996 | } else { |
| 2997 | VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); |
| 2998 | if (tdvp == tvp) |
| 2999 | vrele(tdvp); |
| 3000 | else |
| 3001 | vput(tdvp); |
| 3002 | if (tvp) |
| 3003 | vput(tvp); |
| 3004 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 3005 | vrele(fromnd.ni_dvp); |
| 3006 | vrele(fvp); |
| 3007 | } |
| 3008 | vrele(tond.ni_startdir); |
| 3009 | pool_put(&namei_pool, tond.ni_cnd.cn_pnbuf); |
| 3010 | out1: |
| 3011 | if (fromnd.ni_startdir) |
| 3012 | vrele(fromnd.ni_startdir); |
| 3013 | pool_put(&namei_pool, fromnd.ni_cnd.cn_pnbuf); |
| 3014 | if (error == -1) |
| 3015 | return (0); |
| 3016 | return (error); |
| 3017 | } |
| 3018 | |
| 3019 | /* |
| 3020 | * Make a directory file. |
| 3021 | */ |
| 3022 | int |
| 3023 | sys_mkdir(struct proc *p, void *v, register_t *retval) |
| 3024 | { |
| 3025 | struct sys_mkdir_args /* { |
| 3026 | syscallarg(const char *) path; |
| 3027 | syscallarg(mode_t) mode; |
| 3028 | } */ *uap = v; |
| 3029 | |
| 3030 | return (domkdirat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), SCARG(uap, mode)((uap)->mode.le.datum))); |
| 3031 | } |
| 3032 | |
| 3033 | int |
| 3034 | sys_mkdirat(struct proc *p, void *v, register_t *retval) |
| 3035 | { |
| 3036 | struct sys_mkdirat_args /* { |
| 3037 | syscallarg(int) fd; |
| 3038 | syscallarg(const char *) path; |
| 3039 | syscallarg(mode_t) mode; |
| 3040 | } */ *uap = v; |
| 3041 | |
| 3042 | return (domkdirat(p, SCARG(uap, fd)((uap)->fd.le.datum), SCARG(uap, path)((uap)->path.le.datum), |
| 3043 | SCARG(uap, mode)((uap)->mode.le.datum))); |
| 3044 | } |
| 3045 | |
| 3046 | int |
| 3047 | domkdirat(struct proc *p, int fd, const char *path, mode_t mode) |
| 3048 | { |
| 3049 | struct vnode *vp; |
| 3050 | struct vattr vattr; |
| 3051 | int error; |
| 3052 | struct nameidata nd; |
| 3053 | |
| 3054 | NDINITAT(&nd, CREATE, LOCKPARENT | STRIPSLASHES, UIO_USERSPACE,ndinitat(&nd, 1, 0x0008 | 0x100000, UIO_USERSPACE, fd, path , p) |
| 3055 | fd, path, p)ndinitat(&nd, 1, 0x0008 | 0x100000, UIO_USERSPACE, fd, path , p); |
| 3056 | nd.ni_pledge = PLEDGE_CPATH0x0000000000000004ULL; |
| 3057 | nd.ni_unveil = UNVEIL_CREATE0x04; |
| 3058 | if ((error = namei(&nd)) != 0) |
| 3059 | return (error); |
| 3060 | vp = nd.ni_vp; |
| 3061 | if (vp != NULL((void *)0)) { |
| 3062 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 3063 | if (nd.ni_dvp == vp) |
| 3064 | vrele(nd.ni_dvp); |
| 3065 | else |
| 3066 | vput(nd.ni_dvp); |
| 3067 | vrele(vp); |
| 3068 | return (EEXIST17); |
| 3069 | } |
| 3070 | VATTR_NULL(&vattr)vattr_null(&vattr); |
| 3071 | vattr.va_type = VDIR; |
| 3072 | vattr.va_mode = (mode & ACCESSPERMS(0000700|0000070|0000007)) &~ p->p_fd->fd_cmask; |
| 3073 | error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); |
| 3074 | if (!error) |
| 3075 | vput(nd.ni_vp); |
| 3076 | return (error); |
| 3077 | } |
| 3078 | |
| 3079 | /* |
| 3080 | * Remove a directory file. |
| 3081 | */ |
| 3082 | int |
| 3083 | sys_rmdir(struct proc *p, void *v, register_t *retval) |
| 3084 | { |
| 3085 | struct sys_rmdir_args /* { |
| 3086 | syscallarg(const char *) path; |
| 3087 | } */ *uap = v; |
| 3088 | |
| 3089 | return (dounlinkat(p, AT_FDCWD-100, SCARG(uap, path)((uap)->path.le.datum), AT_REMOVEDIR0x08)); |
| 3090 | } |
| 3091 | |
| 3092 | /* |
| 3093 | * Read a block of directory entries in a file system independent format. |
| 3094 | */ |
| 3095 | int |
| 3096 | sys_getdents(struct proc *p, void *v, register_t *retval) |
| 3097 | { |
| 3098 | struct sys_getdents_args /* { |
| 3099 | syscallarg(int) fd; |
| 3100 | syscallarg(void *) buf; |
| 3101 | syscallarg(size_t) buflen; |
| 3102 | } */ *uap = v; |
| 3103 | struct vnode *vp; |
| 3104 | struct file *fp; |
| 3105 | struct uio auio; |
| 3106 | struct iovec aiov; |
| 3107 | size_t buflen; |
| 3108 | int error, eofflag; |
| 3109 | |
| 3110 | buflen = SCARG(uap, buflen)((uap)->buflen.le.datum); |
| 3111 | |
| 3112 | if (buflen > INT_MAX0x7fffffff) |
| 3113 | return (EINVAL22); |
| 3114 | if ((error = getvnode(p, SCARG(uap, fd)((uap)->fd.le.datum), &fp)) != 0) |
| 3115 | return (error); |
| 3116 | if ((fp->f_flag & FREAD0x0001) == 0) { |
| 3117 | error = EBADF9; |
| 3118 | goto bad; |
| 3119 | } |
| 3120 | vp = fp->f_data; |
| 3121 | if (vp->v_type != VDIR) { |
| 3122 | error = EINVAL22; |
| 3123 | goto bad; |
| 3124 | } |
| 3125 | |
| 3126 | vn_lock(vp, LK_EXCLUSIVE0x0001UL | LK_RETRY0x2000UL); |
| 3127 | |
| 3128 | if (fp->f_offset < 0) { |
| 3129 | VOP_UNLOCK(vp); |
| 3130 | error = EINVAL22; |
| 3131 | goto bad; |
| 3132 | } |
| 3133 | |
| 3134 | aiov.iov_base = SCARG(uap, buf)((uap)->buf.le.datum); |
| 3135 | aiov.iov_len = buflen; |
| 3136 | auio.uio_iov = &aiov; |
| 3137 | auio.uio_iovcnt = 1; |
| 3138 | auio.uio_rw = UIO_READ; |
| 3139 | auio.uio_segflg = UIO_USERSPACE; |
| 3140 | auio.uio_procp = p; |
| 3141 | auio.uio_resid = buflen; |
| 3142 | auio.uio_offset = fp->f_offset; |
| 3143 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag); |
| 3144 | mtx_enter(&fp->f_mtx); |
| 3145 | fp->f_offset = auio.uio_offset; |
| 3146 | mtx_leave(&fp->f_mtx); |
| 3147 | VOP_UNLOCK(vp); |
| 3148 | if (error) |
| 3149 | goto bad; |
| 3150 | *retval = buflen - auio.uio_resid; |
| 3151 | bad: |
| 3152 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 3153 | return (error); |
| 3154 | } |
| 3155 | |
| 3156 | /* |
| 3157 | * Set the mode mask for creation of filesystem nodes. |
| 3158 | */ |
| 3159 | int |
| 3160 | sys_umask(struct proc *p, void *v, register_t *retval) |
| 3161 | { |
| 3162 | struct sys_umask_args /* { |
| 3163 | syscallarg(mode_t) newmask; |
| 3164 | } */ *uap = v; |
| 3165 | struct filedesc *fdp = p->p_fd; |
| 3166 | |
| 3167 | fdplock(fdp)do { do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL , __func__); } while (0); rw_enter_write(&(fdp)->fd_lock ); } while (0); |
| 3168 | *retval = fdp->fd_cmask; |
| 3169 | fdp->fd_cmask = SCARG(uap, newmask)((uap)->newmask.le.datum) & ACCESSPERMS(0000700|0000070|0000007); |
| 3170 | fdpunlock(fdp)rw_exit_write(&(fdp)->fd_lock); |
| 3171 | return (0); |
| 3172 | } |
| 3173 | |
| 3174 | /* |
| 3175 | * Void all references to file by ripping underlying filesystem |
| 3176 | * away from vnode. |
| 3177 | */ |
| 3178 | int |
| 3179 | sys_revoke(struct proc *p, void *v, register_t *retval) |
| 3180 | { |
| 3181 | struct sys_revoke_args /* { |
| 3182 | syscallarg(const char *) path; |
| 3183 | } */ *uap = v; |
| 3184 | struct vnode *vp; |
| 3185 | struct vattr vattr; |
| 3186 | int error; |
| 3187 | struct nameidata nd; |
| 3188 | |
| 3189 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p)ndinitat(&nd, 0, 0x0040, UIO_USERSPACE, -100, ((uap)-> path.le.datum), p); |
| 3190 | nd.ni_pledge = PLEDGE_RPATH0x0000000000000001ULL | PLEDGE_TTY0x0000000000010000ULL; |
| 3191 | nd.ni_unveil = UNVEIL_READ0x01; |
| 3192 | if ((error = namei(&nd)) != 0) |
| 3193 | return (error); |
| 3194 | vp = nd.ni_vp; |
| 3195 | if (vp->v_type != VCHR || (u_int)major(vp->v_rdev)(((unsigned)(vp->v_un.vu_specinfo->si_rdev) >> 8) & 0xff) >= nchrdev || |
| 3196 | cdevsw[major(vp->v_rdev)(((unsigned)(vp->v_un.vu_specinfo->si_rdev) >> 8) & 0xff)].d_type != D_TTY2) { |
| 3197 | error = ENOTTY25; |
| 3198 | goto out; |
| 3199 | } |
| 3200 | if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) |
| 3201 | goto out; |
| 3202 | if (p->p_ucred->cr_uid != vattr.va_uid && |
| 3203 | (error = suser(p))) |
| 3204 | goto out; |
| 3205 | if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED0x0800))) |
| 3206 | VOP_REVOKE(vp, REVOKEALL0x0001); |
| 3207 | out: |
| 3208 | vrele(vp); |
| 3209 | return (error); |
| 3210 | } |
| 3211 | |
| 3212 | /* |
| 3213 | * Convert a user file descriptor to a kernel file entry. |
| 3214 | * |
| 3215 | * On return *fpp is FREF:ed. |
| 3216 | */ |
| 3217 | int |
| 3218 | getvnode(struct proc *p, int fd, struct file **fpp) |
| 3219 | { |
| 3220 | struct file *fp; |
| 3221 | struct vnode *vp; |
| 3222 | |
| 3223 | if ((fp = fd_getfile(p->p_fd, fd)) == NULL((void *)0)) |
| 3224 | return (EBADF9); |
| 3225 | |
| 3226 | if (fp->f_type != DTYPE_VNODE1) { |
| 3227 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 3228 | return (EINVAL22); |
| 3229 | } |
| 3230 | |
| 3231 | vp = fp->f_data; |
| 3232 | if (vp->v_type == VBAD) { |
| 3233 | FRELE(fp, p)(_atomic_sub_int_nv((&fp->f_count), 1) == 0 ? fdrop(fp , p) : 0); |
| 3234 | return (EBADF9); |
| 3235 | } |
| 3236 | |
| 3237 | *fpp = fp; |
| 3238 | |
| 3239 | return (0); |
| 3240 | } |
| 3241 | |
| 3242 | /* |
| 3243 | * Positional read system call. |
| 3244 | */ |
| 3245 | int |
| 3246 | sys_pread(struct proc *p, void *v, register_t *retval) |
| 3247 | { |
| 3248 | struct sys_pread_args /* { |
| 3249 | syscallarg(int) fd; |
| 3250 | syscallarg(void *) buf; |
| 3251 | syscallarg(size_t) nbyte; |
| 3252 | syscallarg(off_t) offset; |
| 3253 | } */ *uap = v; |
| 3254 | struct iovec iov; |
| 3255 | struct uio auio; |
| 3256 | |
| 3257 | iov.iov_base = SCARG(uap, buf)((uap)->buf.le.datum); |
| 3258 | iov.iov_len = SCARG(uap, nbyte)((uap)->nbyte.le.datum); |
| 3259 | if (iov.iov_len > SSIZE_MAX0x7fffffffffffffffL) |
| 3260 | return (EINVAL22); |
| 3261 | |
| 3262 | auio.uio_iov = &iov; |
| 3263 | auio.uio_iovcnt = 1; |
| 3264 | auio.uio_resid = iov.iov_len; |
| 3265 | auio.uio_offset = SCARG(uap, offset)((uap)->offset.le.datum); |
| 3266 | |
| 3267 | return (dofilereadv(p, SCARG(uap, fd)((uap)->fd.le.datum), &auio, FO_POSITION0x00000001, retval)); |
| 3268 | } |
| 3269 | |
| 3270 | /* |
| 3271 | * Positional scatter read system call. |
| 3272 | */ |
| 3273 | int |
| 3274 | sys_preadv(struct proc *p, void *v, register_t *retval) |
| 3275 | { |
| 3276 | struct sys_preadv_args /* { |
| 3277 | syscallarg(int) fd; |
| 3278 | syscallarg(const struct iovec *) iovp; |
| 3279 | syscallarg(int) iovcnt; |
| 3280 | syscallarg(off_t) offset; |
| 3281 | } */ *uap = v; |
| 3282 | struct iovec aiov[UIO_SMALLIOV8], *iov = NULL((void *)0); |
| 3283 | int error, iovcnt = SCARG(uap, iovcnt)((uap)->iovcnt.le.datum); |
| 3284 | struct uio auio; |
| 3285 | size_t resid; |
| 3286 | |
| 3287 | error = iovec_copyin(SCARG(uap, iovp)((uap)->iovp.le.datum), &iov, aiov, iovcnt, &resid); |
| 3288 | if (error) |
| 3289 | goto done; |
| 3290 | |
| 3291 | auio.uio_iov = iov; |
| 3292 | auio.uio_iovcnt = iovcnt; |
| 3293 | auio.uio_resid = resid; |
| 3294 | auio.uio_offset = SCARG(uap, offset)((uap)->offset.le.datum); |
| 3295 | |
| 3296 | error = dofilereadv(p, SCARG(uap, fd)((uap)->fd.le.datum), &auio, FO_POSITION0x00000001, retval); |
| 3297 | done: |
| 3298 | iovec_free(iov, iovcnt); |
| 3299 | return (error); |
| 3300 | } |
| 3301 | |
| 3302 | /* |
| 3303 | * Positional write system call. |
| 3304 | */ |
| 3305 | int |
| 3306 | sys_pwrite(struct proc *p, void *v, register_t *retval) |
| 3307 | { |
| 3308 | struct sys_pwrite_args /* { |
| 3309 | syscallarg(int) fd; |
| 3310 | syscallarg(const void *) buf; |
| 3311 | syscallarg(size_t) nbyte; |
| 3312 | syscallarg(off_t) offset; |
| 3313 | } */ *uap = v; |
| 3314 | struct iovec iov; |
| 3315 | struct uio auio; |
| 3316 | |
| 3317 | iov.iov_base = (void *)SCARG(uap, buf)((uap)->buf.le.datum); |
| 3318 | iov.iov_len = SCARG(uap, nbyte)((uap)->nbyte.le.datum); |
| 3319 | if (iov.iov_len > SSIZE_MAX0x7fffffffffffffffL) |
| 3320 | return (EINVAL22); |
| 3321 | |
| 3322 | auio.uio_iov = &iov; |
| 3323 | auio.uio_iovcnt = 1; |
| 3324 | auio.uio_resid = iov.iov_len; |
| 3325 | auio.uio_offset = SCARG(uap, offset)((uap)->offset.le.datum); |
| 3326 | |
| 3327 | return (dofilewritev(p, SCARG(uap, fd)((uap)->fd.le.datum), &auio, FO_POSITION0x00000001, retval)); |
| 3328 | } |
| 3329 | |
| 3330 | /* |
| 3331 | * Positional gather write system call. |
| 3332 | */ |
| 3333 | int |
| 3334 | sys_pwritev(struct proc *p, void *v, register_t *retval) |
| 3335 | { |
| 3336 | struct sys_pwritev_args /* { |
| 3337 | syscallarg(int) fd; |
| 3338 | syscallarg(const struct iovec *) iovp; |
| 3339 | syscallarg(int) iovcnt; |
| 3340 | syscallarg(off_t) offset; |
| 3341 | } */ *uap = v; |
| 3342 | struct iovec aiov[UIO_SMALLIOV8], *iov = NULL((void *)0); |
| 3343 | int error, iovcnt = SCARG(uap, iovcnt)((uap)->iovcnt.le.datum); |
| 3344 | struct uio auio; |
| 3345 | size_t resid; |
| 3346 | |
| 3347 | error = iovec_copyin(SCARG(uap, iovp)((uap)->iovp.le.datum), &iov, aiov, iovcnt, &resid); |
| 3348 | if (error) |
| 3349 | goto done; |
| 3350 | |
| 3351 | auio.uio_iov = iov; |
| 3352 | auio.uio_iovcnt = iovcnt; |
| 3353 | auio.uio_resid = resid; |
| 3354 | auio.uio_offset = SCARG(uap, offset)((uap)->offset.le.datum); |
| 3355 | |
| 3356 | error = dofilewritev(p, SCARG(uap, fd)((uap)->fd.le.datum), &auio, FO_POSITION0x00000001, retval); |
| 3357 | done: |
| 3358 | iovec_free(iov, iovcnt); |
| 3359 | return (error); |
| 3360 | } |