| 1 | /* |
| 2 | * Copyright (c) 1982, 1986, 1989, 1993, 1995 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * (c) UNIX System Laboratories, Inc. |
| 5 | * All or some portions of this file are derived from material licensed |
| 6 | * to the University of California by American Telephone and Telegraph |
| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 8 | * the permission of UNIX System Laboratories, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by the University of |
| 21 | * California, Berkeley and its contributors. |
| 22 | * 4. Neither the name of the University nor the names of its contributors |
| 23 | * may be used to endorse or promote products derived from this software |
| 24 | * without specific prior written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 36 | * SUCH DAMAGE. |
| 37 | * |
| 38 | * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95 |
| 39 | * $FreeBSD: src/sys/ufs/ufs/ufs_vnops.c,v 1.131.2.8 2003/01/02 17:26:19 bde Exp $ |
| 40 | * $DragonFly: src/sys/vfs/ufs/ufs_vnops.c,v 1.35 2006/03/27 01:54:17 dillon Exp $ |
| 41 | */ |
| 42 | |
| 43 | #include "opt_quota.h" |
| 44 | #include "opt_suiddir.h" |
| 45 | #include "opt_ufs.h" |
| 46 | |
| 47 | #include <sys/param.h> |
| 48 | #include <sys/systm.h> |
| 49 | #include <sys/kernel.h> |
| 50 | #include <sys/fcntl.h> |
| 51 | #include <sys/stat.h> |
| 52 | #include <sys/buf.h> |
| 53 | #include <sys/proc.h> |
| 54 | #include <sys/namei.h> |
| 55 | #include <sys/mount.h> |
| 56 | #include <sys/unistd.h> |
| 57 | #include <sys/vnode.h> |
| 58 | #include <sys/malloc.h> |
| 59 | #include <sys/dirent.h> |
| 60 | #include <sys/lockf.h> |
| 61 | #include <sys/event.h> |
| 62 | #include <sys/conf.h> |
| 63 | |
| 64 | #include <sys/file.h> /* XXX */ |
| 65 | #include <sys/jail.h> |
| 66 | |
| 67 | #include <vm/vm.h> |
| 68 | #include <vm/vm_extern.h> |
| 69 | |
| 70 | #include <vfs/fifofs/fifo.h> |
| 71 | |
| 72 | #include "quota.h" |
| 73 | #include "inode.h" |
| 74 | #include "dir.h" |
| 75 | #include "ufsmount.h" |
| 76 | #include "ufs_extern.h" |
| 77 | #ifdef UFS_DIRHASH |
| 78 | #include "dirhash.h" |
| 79 | #endif |
| 80 | |
| 81 | static int ufs_access (struct vop_access_args *); |
| 82 | static int ufs_advlock (struct vop_advlock_args *); |
| 83 | static int ufs_chmod (struct vnode *, int, struct ucred *, struct thread *); |
| 84 | static int ufs_chown (struct vnode *, uid_t, gid_t, struct ucred *, struct thread *); |
| 85 | static int ufs_close (struct vop_close_args *); |
| 86 | static int ufs_create (struct vop_old_create_args *); |
| 87 | static int ufs_getattr (struct vop_getattr_args *); |
| 88 | static int ufs_link (struct vop_old_link_args *); |
| 89 | static int ufs_makeinode (int mode, struct vnode *, struct vnode **, struct componentname *); |
| 90 | static int ufs_missingop (struct vop_generic_args *ap); |
| 91 | static int ufs_mkdir (struct vop_old_mkdir_args *); |
| 92 | static int ufs_mknod (struct vop_old_mknod_args *); |
| 93 | static int ufs_mmap (struct vop_mmap_args *); |
| 94 | static int ufs_open (struct vop_open_args *); |
| 95 | static int ufs_pathconf (struct vop_pathconf_args *); |
| 96 | static int ufs_print (struct vop_print_args *); |
| 97 | static int ufs_readdir (struct vop_readdir_args *); |
| 98 | static int ufs_readlink (struct vop_readlink_args *); |
| 99 | static int ufs_remove (struct vop_old_remove_args *); |
| 100 | static int ufs_rename (struct vop_old_rename_args *); |
| 101 | static int ufs_rmdir (struct vop_old_rmdir_args *); |
| 102 | static int ufs_setattr (struct vop_setattr_args *); |
| 103 | static int ufs_strategy (struct vop_strategy_args *); |
| 104 | static int ufs_symlink (struct vop_old_symlink_args *); |
| 105 | static int ufs_whiteout (struct vop_old_whiteout_args *); |
| 106 | static int ufsfifo_close (struct vop_close_args *); |
| 107 | static int ufsfifo_kqfilter (struct vop_kqfilter_args *); |
| 108 | static int ufsfifo_read (struct vop_read_args *); |
| 109 | static int ufsfifo_write (struct vop_write_args *); |
| 110 | static int ufsspec_close (struct vop_close_args *); |
| 111 | static int ufsspec_read (struct vop_read_args *); |
| 112 | static int ufsspec_write (struct vop_write_args *); |
| 113 | static int filt_ufsread (struct knote *kn, long hint); |
| 114 | static int filt_ufswrite (struct knote *kn, long hint); |
| 115 | static int filt_ufsvnode (struct knote *kn, long hint); |
| 116 | static void filt_ufsdetach (struct knote *kn); |
| 117 | static int ufs_kqfilter (struct vop_kqfilter_args *ap); |
| 118 | |
| 119 | union _qcvt { |
| 120 | int64_t qcvt; |
| 121 | int32_t val[2]; |
| 122 | }; |
| 123 | #define SETHIGH(q, h) { \ |
| 124 | union _qcvt tmp; \ |
| 125 | tmp.qcvt = (q); \ |
| 126 | tmp.val[_QUAD_HIGHWORD] = (h); \ |
| 127 | (q) = tmp.qcvt; \ |
| 128 | } |
| 129 | #define SETLOW(q, l) { \ |
| 130 | union _qcvt tmp; \ |
| 131 | tmp.qcvt = (q); \ |
| 132 | tmp.val[_QUAD_LOWWORD] = (l); \ |
| 133 | (q) = tmp.qcvt; \ |
| 134 | } |
| 135 | #define VN_KNOTE(vp, b) \ |
| 136 | KNOTE(&vp->v_pollinfo.vpi_selinfo.si_note, (b)) |
| 137 | |
| 138 | #define OFSFMT(vp) ((vp)->v_mount->mnt_maxsymlinklen <= 0) |
| 139 | |
| 140 | /* |
| 141 | * A virgin directory (no blushing please). |
| 142 | */ |
| 143 | static struct dirtemplate mastertemplate = { |
| 144 | 0, 12, DT_DIR, 1, ".", |
| 145 | 0, DIRBLKSIZ - 12, DT_DIR, 2, ".." |
| 146 | }; |
| 147 | static struct odirtemplate omastertemplate = { |
| 148 | 0, 12, 1, ".", |
| 149 | 0, DIRBLKSIZ - 12, 2, ".." |
| 150 | }; |
| 151 | |
| 152 | void |
| 153 | ufs_itimes(struct vnode *vp) |
| 154 | { |
| 155 | struct inode *ip; |
| 156 | struct timespec ts; |
| 157 | |
| 158 | ip = VTOI(vp); |
| 159 | if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0) |
| 160 | return; |
| 161 | if ((vp->v_type == VBLK || vp->v_type == VCHR) && !DOINGSOFTDEP(vp)) |
| 162 | ip->i_flag |= IN_LAZYMOD; |
| 163 | else |
| 164 | ip->i_flag |= IN_MODIFIED; |
| 165 | if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 166 | vfs_timestamp(&ts); |
| 167 | if (ip->i_flag & IN_ACCESS) { |
| 168 | ip->i_atime = ts.tv_sec; |
| 169 | ip->i_atimensec = ts.tv_nsec; |
| 170 | } |
| 171 | if (ip->i_flag & IN_UPDATE) { |
| 172 | ip->i_mtime = ts.tv_sec; |
| 173 | ip->i_mtimensec = ts.tv_nsec; |
| 174 | ip->i_modrev++; |
| 175 | } |
| 176 | if (ip->i_flag & IN_CHANGE) { |
| 177 | ip->i_ctime = ts.tv_sec; |
| 178 | ip->i_ctimensec = ts.tv_nsec; |
| 179 | } |
| 180 | } |
| 181 | ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Create a regular file |
| 186 | * |
| 187 | * ufs_create(struct vnode *a_dvp, struct vnode **a_vpp, |
| 188 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 189 | */ |
| 190 | static |
| 191 | int |
| 192 | ufs_create(struct vop_old_create_args *ap) |
| 193 | { |
| 194 | int error; |
| 195 | |
| 196 | error = |
| 197 | ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), |
| 198 | ap->a_dvp, ap->a_vpp, ap->a_cnp); |
| 199 | if (error) |
| 200 | return (error); |
| 201 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
| 202 | return (0); |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Mknod vnode call |
| 207 | * |
| 208 | * ufs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, |
| 209 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 210 | */ |
| 211 | /* ARGSUSED */ |
| 212 | static |
| 213 | int |
| 214 | ufs_mknod(struct vop_old_mknod_args *ap) |
| 215 | { |
| 216 | struct vattr *vap = ap->a_vap; |
| 217 | struct vnode **vpp = ap->a_vpp; |
| 218 | struct inode *ip; |
| 219 | ino_t ino; |
| 220 | int error; |
| 221 | |
| 222 | error = ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), |
| 223 | ap->a_dvp, vpp, ap->a_cnp); |
| 224 | if (error) |
| 225 | return (error); |
| 226 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
| 227 | ip = VTOI(*vpp); |
| 228 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 229 | if (vap->va_rdev != VNOVAL) { |
| 230 | /* |
| 231 | * Want to be able to use this to make badblock |
| 232 | * inodes, so don't truncate the dev number. |
| 233 | */ |
| 234 | ip->i_rdev = vap->va_rdev; |
| 235 | } |
| 236 | /* |
| 237 | * Remove inode, then reload it through VFS_VGET so it is |
| 238 | * checked to see if it is an alias of an existing entry in |
| 239 | * the inode cache. |
| 240 | */ |
| 241 | (*vpp)->v_type = VNON; |
| 242 | ino = ip->i_number; /* Save this before vgone() invalidates ip. */ |
| 243 | vgone(*vpp); |
| 244 | vput(*vpp); |
| 245 | error = VFS_VGET(ap->a_dvp->v_mount, ino, vpp); |
| 246 | if (error) { |
| 247 | *vpp = NULL; |
| 248 | return (error); |
| 249 | } |
| 250 | return (0); |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * Open called. |
| 255 | * |
| 256 | * Nothing to do. |
| 257 | * |
| 258 | * ufs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
| 259 | * struct thread *a_td) |
| 260 | */ |
| 261 | /* ARGSUSED */ |
| 262 | static |
| 263 | int |
| 264 | ufs_open(struct vop_open_args *ap) |
| 265 | { |
| 266 | /* |
| 267 | * Files marked append-only must be opened for appending. |
| 268 | */ |
| 269 | if ((VTOI(ap->a_vp)->i_flags & APPEND) && |
| 270 | (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) |
| 271 | return (EPERM); |
| 272 | return (0); |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * Close called. |
| 277 | * |
| 278 | * Update the times on the inode. |
| 279 | * |
| 280 | * ufs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, |
| 281 | * struct thread *a_td) |
| 282 | */ |
| 283 | /* ARGSUSED */ |
| 284 | static |
| 285 | int |
| 286 | ufs_close(struct vop_close_args *ap) |
| 287 | { |
| 288 | struct vnode *vp = ap->a_vp; |
| 289 | |
| 290 | if (vp->v_usecount > 1) |
| 291 | ufs_itimes(vp); |
| 292 | return (0); |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * ufs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
| 297 | * struct thread *a_td) |
| 298 | */ |
| 299 | static |
| 300 | int |
| 301 | ufs_access(struct vop_access_args *ap) |
| 302 | { |
| 303 | struct vnode *vp = ap->a_vp; |
| 304 | struct inode *ip = VTOI(vp); |
| 305 | struct ucred *cred = ap->a_cred; |
| 306 | mode_t mask, mode = ap->a_mode; |
| 307 | gid_t *gp; |
| 308 | int i; |
| 309 | #ifdef QUOTA |
| 310 | int error; |
| 311 | #endif |
| 312 | |
| 313 | /* |
| 314 | * Disallow write attempts on read-only filesystems; |
| 315 | * unless the file is a socket, fifo, or a block or |
| 316 | * character device resident on the filesystem. |
| 317 | */ |
| 318 | if (mode & VWRITE) { |
| 319 | switch (vp->v_type) { |
| 320 | case VDIR: |
| 321 | case VLNK: |
| 322 | case VREG: |
| 323 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 324 | return (EROFS); |
| 325 | #ifdef QUOTA |
| 326 | if ((error = getinoquota(ip)) != 0) |
| 327 | return (error); |
| 328 | #endif |
| 329 | break; |
| 330 | default: |
| 331 | break; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | /* If immutable bit set, nobody gets to write it. */ |
| 336 | if ((mode & VWRITE) && (ip->i_flags & IMMUTABLE)) |
| 337 | return (EPERM); |
| 338 | |
| 339 | /* Otherwise, user id 0 always gets access. */ |
| 340 | if (cred->cr_uid == 0) |
| 341 | return (0); |
| 342 | |
| 343 | mask = 0; |
| 344 | |
| 345 | /* Otherwise, check the owner. */ |
| 346 | if (cred->cr_uid == ip->i_uid) { |
| 347 | if (mode & VEXEC) |
| 348 | mask |= S_IXUSR; |
| 349 | if (mode & VREAD) |
| 350 | mask |= S_IRUSR; |
| 351 | if (mode & VWRITE) |
| 352 | mask |= S_IWUSR; |
| 353 | return ((ip->i_mode & mask) == mask ? 0 : EACCES); |
| 354 | } |
| 355 | |
| 356 | /* Otherwise, check the groups. */ |
| 357 | for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) |
| 358 | if (ip->i_gid == *gp) { |
| 359 | if (mode & VEXEC) |
| 360 | mask |= S_IXGRP; |
| 361 | if (mode & VREAD) |
| 362 | mask |= S_IRGRP; |
| 363 | if (mode & VWRITE) |
| 364 | mask |= S_IWGRP; |
| 365 | return ((ip->i_mode & mask) == mask ? 0 : EACCES); |
| 366 | } |
| 367 | |
| 368 | /* Otherwise, check everyone else. */ |
| 369 | if (mode & VEXEC) |
| 370 | mask |= S_IXOTH; |
| 371 | if (mode & VREAD) |
| 372 | mask |= S_IROTH; |
| 373 | if (mode & VWRITE) |
| 374 | mask |= S_IWOTH; |
| 375 | return ((ip->i_mode & mask) == mask ? 0 : EACCES); |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * ufs_getattr(struct vnode *a_vp, struct vattr *a_vap, |
| 380 | * struct thread *a_td) |
| 381 | */ |
| 382 | /* ARGSUSED */ |
| 383 | static |
| 384 | int |
| 385 | ufs_getattr(struct vop_getattr_args *ap) |
| 386 | { |
| 387 | struct vnode *vp = ap->a_vp; |
| 388 | struct inode *ip = VTOI(vp); |
| 389 | struct vattr *vap = ap->a_vap; |
| 390 | |
| 391 | /* |
| 392 | * This may cause i_fsmid to be updated even if no change (0) |
| 393 | * is returned, but we should only write out the inode if non-zero |
| 394 | * is returned and if the mount is read-write. |
| 395 | */ |
| 396 | if (cache_check_fsmid_vp(vp, &ip->i_fsmid) && |
| 397 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 |
| 398 | ) { |
| 399 | ip->i_flag |= IN_LAZYMOD; |
| 400 | } |
| 401 | |
| 402 | ufs_itimes(vp); |
| 403 | /* |
| 404 | * Copy from inode table |
| 405 | */ |
| 406 | vap->va_fsid = dev2udev(ip->i_dev); |
| 407 | vap->va_fileid = ip->i_number; |
| 408 | vap->va_mode = ip->i_mode & ~IFMT; |
| 409 | vap->va_nlink = VFSTOUFS(vp->v_mount)->um_i_effnlink_valid ? |
| 410 | ip->i_effnlink : ip->i_nlink; |
| 411 | vap->va_uid = ip->i_uid; |
| 412 | vap->va_gid = ip->i_gid; |
| 413 | vap->va_rdev = ip->i_rdev; |
| 414 | vap->va_size = ip->i_din.di_size; |
| 415 | vap->va_atime.tv_sec = ip->i_atime; |
| 416 | vap->va_atime.tv_nsec = ip->i_atimensec; |
| 417 | vap->va_mtime.tv_sec = ip->i_mtime; |
| 418 | vap->va_mtime.tv_nsec = ip->i_mtimensec; |
| 419 | vap->va_ctime.tv_sec = ip->i_ctime; |
| 420 | vap->va_ctime.tv_nsec = ip->i_ctimensec; |
| 421 | vap->va_flags = ip->i_flags; |
| 422 | vap->va_gen = ip->i_gen; |
| 423 | vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; |
| 424 | vap->va_bytes = dbtob((u_quad_t)ip->i_blocks); |
| 425 | vap->va_type = IFTOVT(ip->i_mode); |
| 426 | vap->va_filerev = ip->i_modrev; |
| 427 | vap->va_fsmid = ip->i_fsmid; |
| 428 | return (0); |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Set attribute vnode op. called from several syscalls |
| 433 | * |
| 434 | * ufs_setattr(struct vnode *a_vp, struct vattr *a_vap, |
| 435 | * struct ucred *a_cred, struct thread *a_td) |
| 436 | */ |
| 437 | static |
| 438 | int |
| 439 | ufs_setattr(struct vop_setattr_args *ap) |
| 440 | { |
| 441 | struct vattr *vap = ap->a_vap; |
| 442 | struct vnode *vp = ap->a_vp; |
| 443 | struct inode *ip = VTOI(vp); |
| 444 | struct ucred *cred = ap->a_cred; |
| 445 | int error; |
| 446 | |
| 447 | /* |
| 448 | * Check for unsettable attributes. |
| 449 | */ |
| 450 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || |
| 451 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || |
| 452 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || |
| 453 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
| 454 | return (EINVAL); |
| 455 | } |
| 456 | if (vap->va_flags != VNOVAL) { |
| 457 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 458 | return (EROFS); |
| 459 | if (cred->cr_uid != ip->i_uid && |
| 460 | (error = suser_cred(cred, PRISON_ROOT))) |
| 461 | return (error); |
| 462 | /* |
| 463 | * Note that a root chflags becomes a user chflags when |
| 464 | * we are jailed, unless the jail.chflags_allowed sysctl |
| 465 | * is set. |
| 466 | */ |
| 467 | if (cred->cr_uid == 0 && |
| 468 | (!jailed(cred) || jail_chflags_allowed)) { |
| 469 | if ((ip->i_flags |
| 470 | & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) && |
| 471 | securelevel > 0) |
| 472 | return (EPERM); |
| 473 | ip->i_flags = vap->va_flags; |
| 474 | } else { |
| 475 | if (ip->i_flags |
| 476 | & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) || |
| 477 | (vap->va_flags & UF_SETTABLE) != vap->va_flags) |
| 478 | return (EPERM); |
| 479 | ip->i_flags &= SF_SETTABLE; |
| 480 | ip->i_flags |= (vap->va_flags & UF_SETTABLE); |
| 481 | } |
| 482 | ip->i_flag |= IN_CHANGE; |
| 483 | if (vap->va_flags & (IMMUTABLE | APPEND)) |
| 484 | return (0); |
| 485 | } |
| 486 | if (ip->i_flags & (IMMUTABLE | APPEND)) |
| 487 | return (EPERM); |
| 488 | /* |
| 489 | * Go through the fields and update iff not VNOVAL. |
| 490 | */ |
| 491 | if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { |
| 492 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 493 | return (EROFS); |
| 494 | if ((error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, ap->a_td)) != 0) |
| 495 | return (error); |
| 496 | } |
| 497 | if (vap->va_size != VNOVAL) { |
| 498 | /* |
| 499 | * Disallow write attempts on read-only filesystems; |
| 500 | * unless the file is a socket, fifo, or a block or |
| 501 | * character device resident on the filesystem. |
| 502 | */ |
| 503 | switch (vp->v_type) { |
| 504 | case VDIR: |
| 505 | return (EISDIR); |
| 506 | case VLNK: |
| 507 | case VREG: |
| 508 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 509 | return (EROFS); |
| 510 | break; |
| 511 | default: |
| 512 | break; |
| 513 | } |
| 514 | if ((error = UFS_TRUNCATE(vp, vap->va_size, 0, cred, ap->a_td)) != 0) |
| 515 | return (error); |
| 516 | } |
| 517 | ip = VTOI(vp); |
| 518 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { |
| 519 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 520 | return (EROFS); |
| 521 | if (cred->cr_uid != ip->i_uid && |
| 522 | (error = suser_cred(cred, PRISON_ROOT)) && |
| 523 | ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || |
| 524 | (error = VOP_ACCESS(vp, VWRITE, cred, ap->a_td)))) |
| 525 | return (error); |
| 526 | if (vap->va_atime.tv_sec != VNOVAL) |
| 527 | ip->i_flag |= IN_ACCESS; |
| 528 | if (vap->va_mtime.tv_sec != VNOVAL) |
| 529 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
| 530 | ufs_itimes(vp); |
| 531 | if (vap->va_atime.tv_sec != VNOVAL) { |
| 532 | ip->i_atime = vap->va_atime.tv_sec; |
| 533 | ip->i_atimensec = vap->va_atime.tv_nsec; |
| 534 | } |
| 535 | if (vap->va_mtime.tv_sec != VNOVAL) { |
| 536 | ip->i_mtime = vap->va_mtime.tv_sec; |
| 537 | ip->i_mtimensec = vap->va_mtime.tv_nsec; |
| 538 | } |
| 539 | error = UFS_UPDATE(vp, 0); |
| 540 | if (error) |
| 541 | return (error); |
| 542 | } |
| 543 | error = 0; |
| 544 | if (vap->va_mode != (mode_t)VNOVAL) { |
| 545 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 546 | return (EROFS); |
| 547 | error = ufs_chmod(vp, (int)vap->va_mode, cred, ap->a_td); |
| 548 | } |
| 549 | VN_KNOTE(vp, NOTE_ATTRIB); |
| 550 | return (error); |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * Change the mode on a file. |
| 555 | * Inode must be locked before calling. |
| 556 | */ |
| 557 | static int |
| 558 | ufs_chmod(struct vnode *vp, int mode, struct ucred *cred, struct thread *td) |
| 559 | { |
| 560 | struct inode *ip = VTOI(vp); |
| 561 | int error; |
| 562 | |
| 563 | if (cred->cr_uid != ip->i_uid) { |
| 564 | error = suser_cred(cred, PRISON_ROOT); |
| 565 | if (error) |
| 566 | return (error); |
| 567 | } |
| 568 | if (cred->cr_uid) { |
| 569 | if (vp->v_type != VDIR && (mode & S_ISTXT)) |
| 570 | return (EFTYPE); |
| 571 | if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) |
| 572 | return (EPERM); |
| 573 | } |
| 574 | ip->i_mode &= ~ALLPERMS; |
| 575 | ip->i_mode |= (mode & ALLPERMS); |
| 576 | ip->i_flag |= IN_CHANGE; |
| 577 | return (0); |
| 578 | } |
| 579 | |
| 580 | /* |
| 581 | * Perform chown operation on inode ip; |
| 582 | * inode must be locked prior to call. |
| 583 | */ |
| 584 | static int |
| 585 | ufs_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred, |
| 586 | struct thread *td) |
| 587 | { |
| 588 | struct inode *ip = VTOI(vp); |
| 589 | uid_t ouid; |
| 590 | gid_t ogid; |
| 591 | int error = 0; |
| 592 | #ifdef QUOTA |
| 593 | int i; |
| 594 | long change; |
| 595 | #endif |
| 596 | |
| 597 | if (uid == (uid_t)VNOVAL) |
| 598 | uid = ip->i_uid; |
| 599 | if (gid == (gid_t)VNOVAL) |
| 600 | gid = ip->i_gid; |
| 601 | /* |
| 602 | * If we don't own the file, are trying to change the owner |
| 603 | * of the file, or are not a member of the target group, |
| 604 | * the caller must be superuser or the call fails. |
| 605 | */ |
| 606 | if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid || |
| 607 | (gid != ip->i_gid && !(cred->cr_gid == gid || |
| 608 | groupmember((gid_t)gid, cred)))) && |
| 609 | (error = suser_cred(cred, PRISON_ROOT))) |
| 610 | return (error); |
| 611 | ogid = ip->i_gid; |
| 612 | ouid = ip->i_uid; |
| 613 | #ifdef QUOTA |
| 614 | if ((error = getinoquota(ip)) != 0) |
| 615 | return (error); |
| 616 | if (ouid == uid) { |
| 617 | dqrele(vp, ip->i_dquot[USRQUOTA]); |
| 618 | ip->i_dquot[USRQUOTA] = NODQUOT; |
| 619 | } |
| 620 | if (ogid == gid) { |
| 621 | dqrele(vp, ip->i_dquot[GRPQUOTA]); |
| 622 | ip->i_dquot[GRPQUOTA] = NODQUOT; |
| 623 | } |
| 624 | change = ip->i_blocks; |
| 625 | (void) chkdq(ip, -change, cred, CHOWN); |
| 626 | (void) chkiq(ip, -1, cred, CHOWN); |
| 627 | for (i = 0; i < MAXQUOTAS; i++) { |
| 628 | dqrele(vp, ip->i_dquot[i]); |
| 629 | ip->i_dquot[i] = NODQUOT; |
| 630 | } |
| 631 | #endif |
| 632 | ip->i_gid = gid; |
| 633 | ip->i_uid = uid; |
| 634 | #ifdef QUOTA |
| 635 | if ((error = getinoquota(ip)) == 0) { |
| 636 | if (ouid == uid) { |
| 637 | dqrele(vp, ip->i_dquot[USRQUOTA]); |
| 638 | ip->i_dquot[USRQUOTA] = NODQUOT; |
| 639 | } |
| 640 | if (ogid == gid) { |
| 641 | dqrele(vp, ip->i_dquot[GRPQUOTA]); |
| 642 | ip->i_dquot[GRPQUOTA] = NODQUOT; |
| 643 | } |
| 644 | if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { |
| 645 | if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) |
| 646 | goto good; |
| 647 | else |
| 648 | (void) chkdq(ip, -change, cred, CHOWN|FORCE); |
| 649 | } |
| 650 | for (i = 0; i < MAXQUOTAS; i++) { |
| 651 | dqrele(vp, ip->i_dquot[i]); |
| 652 | ip->i_dquot[i] = NODQUOT; |
| 653 | } |
| 654 | } |
| 655 | ip->i_gid = ogid; |
| 656 | ip->i_uid = ouid; |
| 657 | if (getinoquota(ip) == 0) { |
| 658 | if (ouid == uid) { |
| 659 | dqrele(vp, ip->i_dquot[USRQUOTA]); |
| 660 | ip->i_dquot[USRQUOTA] = NODQUOT; |
| 661 | } |
| 662 | if (ogid == gid) { |
| 663 | dqrele(vp, ip->i_dquot[GRPQUOTA]); |
| 664 | ip->i_dquot[GRPQUOTA] = NODQUOT; |
| 665 | } |
| 666 | (void) chkdq(ip, change, cred, FORCE|CHOWN); |
| 667 | (void) chkiq(ip, 1, cred, FORCE|CHOWN); |
| 668 | (void) getinoquota(ip); |
| 669 | } |
| 670 | return (error); |
| 671 | good: |
| 672 | if (getinoquota(ip)) |
| 673 | panic("ufs_chown: lost quota"); |
| 674 | #endif /* QUOTA */ |
| 675 | ip->i_flag |= IN_CHANGE; |
| 676 | if (cred->cr_uid != 0 && (ouid != uid || ogid != gid)) |
| 677 | ip->i_mode &= ~(ISUID | ISGID); |
| 678 | return (0); |
| 679 | } |
| 680 | |
| 681 | /* |
| 682 | * Mmap a file |
| 683 | * |
| 684 | * NB Currently unsupported. |
| 685 | * |
| 686 | * ufs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred, |
| 687 | * struct thread *a_td) |
| 688 | */ |
| 689 | /* ARGSUSED */ |
| 690 | static |
| 691 | int |
| 692 | ufs_mmap(struct vop_mmap_args *ap) |
| 693 | { |
| 694 | return (EINVAL); |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * ufs_remove(struct vnode *a_dvp, struct vnode *a_vp, |
| 699 | * struct componentname *a_cnp) |
| 700 | */ |
| 701 | static |
| 702 | int |
| 703 | ufs_remove(struct vop_old_remove_args *ap) |
| 704 | { |
| 705 | struct inode *ip; |
| 706 | struct vnode *vp = ap->a_vp; |
| 707 | struct vnode *dvp = ap->a_dvp; |
| 708 | int error; |
| 709 | |
| 710 | ip = VTOI(vp); |
| 711 | if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || |
| 712 | (VTOI(dvp)->i_flags & APPEND)) { |
| 713 | error = EPERM; |
| 714 | goto out; |
| 715 | } |
| 716 | error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0); |
| 717 | VN_KNOTE(vp, NOTE_DELETE); |
| 718 | VN_KNOTE(dvp, NOTE_WRITE); |
| 719 | out: |
| 720 | return (error); |
| 721 | } |
| 722 | |
| 723 | /* |
| 724 | * link vnode call |
| 725 | * |
| 726 | * ufs_link(struct vnode *a_tdvp, struct vnode *a_vp, |
| 727 | * struct componentname *a_cnp) |
| 728 | */ |
| 729 | static |
| 730 | int |
| 731 | ufs_link(struct vop_old_link_args *ap) |
| 732 | { |
| 733 | struct vnode *vp = ap->a_vp; |
| 734 | struct vnode *tdvp = ap->a_tdvp; |
| 735 | struct componentname *cnp = ap->a_cnp; |
| 736 | struct thread *td = cnp->cn_td; |
| 737 | struct inode *ip; |
| 738 | struct direct newdir; |
| 739 | int error; |
| 740 | |
| 741 | if (tdvp->v_mount != vp->v_mount) { |
| 742 | error = EXDEV; |
| 743 | goto out2; |
| 744 | } |
| 745 | if (tdvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE, td))) { |
| 746 | goto out2; |
| 747 | } |
| 748 | ip = VTOI(vp); |
| 749 | if ((nlink_t)ip->i_nlink >= LINK_MAX) { |
| 750 | error = EMLINK; |
| 751 | goto out1; |
| 752 | } |
| 753 | if (ip->i_flags & (IMMUTABLE | APPEND)) { |
| 754 | error = EPERM; |
| 755 | goto out1; |
| 756 | } |
| 757 | ip->i_effnlink++; |
| 758 | ip->i_nlink++; |
| 759 | ip->i_flag |= IN_CHANGE; |
| 760 | if (DOINGSOFTDEP(vp)) |
| 761 | softdep_change_linkcnt(ip); |
| 762 | error = UFS_UPDATE(vp, !(DOINGSOFTDEP(vp) | DOINGASYNC(vp))); |
| 763 | if (!error) { |
| 764 | ufs_makedirentry(ip, cnp, &newdir); |
| 765 | error = ufs_direnter(tdvp, vp, &newdir, cnp, NULL); |
| 766 | } |
| 767 | |
| 768 | if (error) { |
| 769 | ip->i_effnlink--; |
| 770 | ip->i_nlink--; |
| 771 | ip->i_flag |= IN_CHANGE; |
| 772 | if (DOINGSOFTDEP(vp)) |
| 773 | softdep_change_linkcnt(ip); |
| 774 | } |
| 775 | out1: |
| 776 | if (tdvp != vp) |
| 777 | VOP_UNLOCK(vp, 0, td); |
| 778 | out2: |
| 779 | VN_KNOTE(vp, NOTE_LINK); |
| 780 | VN_KNOTE(tdvp, NOTE_WRITE); |
| 781 | return (error); |
| 782 | } |
| 783 | |
| 784 | /* |
| 785 | * whiteout vnode call |
| 786 | * |
| 787 | * ufs_whiteout(struct vnode *a_dvp, struct componentname *a_cnp, int a_flags) |
| 788 | */ |
| 789 | static |
| 790 | int |
| 791 | ufs_whiteout(struct vop_old_whiteout_args *ap) |
| 792 | { |
| 793 | struct vnode *dvp = ap->a_dvp; |
| 794 | struct componentname *cnp = ap->a_cnp; |
| 795 | struct direct newdir; |
| 796 | int error = 0; |
| 797 | |
| 798 | switch (ap->a_flags) { |
| 799 | case NAMEI_LOOKUP: |
| 800 | /* 4.4 format directories support whiteout operations */ |
| 801 | if (dvp->v_mount->mnt_maxsymlinklen > 0) |
| 802 | return (0); |
| 803 | return (EOPNOTSUPP); |
| 804 | |
| 805 | case NAMEI_CREATE: |
| 806 | /* create a new directory whiteout */ |
| 807 | #ifdef DIAGNOSTIC |
| 808 | if (dvp->v_mount->mnt_maxsymlinklen <= 0) |
| 809 | panic("ufs_whiteout: old format filesystem"); |
| 810 | #endif |
| 811 | |
| 812 | newdir.d_ino = WINO; |
| 813 | newdir.d_namlen = cnp->cn_namelen; |
| 814 | bcopy(cnp->cn_nameptr, newdir.d_name, (unsigned)cnp->cn_namelen + 1); |
| 815 | newdir.d_type = DT_WHT; |
| 816 | error = ufs_direnter(dvp, NULL, &newdir, cnp, NULL); |
| 817 | break; |
| 818 | |
| 819 | case NAMEI_DELETE: |
| 820 | /* remove an existing directory whiteout */ |
| 821 | #ifdef DIAGNOSTIC |
| 822 | if (dvp->v_mount->mnt_maxsymlinklen <= 0) |
| 823 | panic("ufs_whiteout: old format filesystem"); |
| 824 | #endif |
| 825 | |
| 826 | cnp->cn_flags &= ~CNP_DOWHITEOUT; |
| 827 | error = ufs_dirremove(dvp, NULL, cnp->cn_flags, 0); |
| 828 | break; |
| 829 | default: |
| 830 | panic("ufs_whiteout: unknown op"); |
| 831 | } |
| 832 | return (error); |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Rename system call. |
| 837 | * rename("foo", "bar"); |
| 838 | * is essentially |
| 839 | * unlink("bar"); |
| 840 | * link("foo", "bar"); |
| 841 | * unlink("foo"); |
| 842 | * but ``atomically''. Can't do full commit without saving state in the |
| 843 | * inode on disk which isn't feasible at this time. Best we can do is |
| 844 | * always guarantee the target exists. |
| 845 | * |
| 846 | * Basic algorithm is: |
| 847 | * |
| 848 | * 1) Bump link count on source while we're linking it to the |
| 849 | * target. This also ensure the inode won't be deleted out |
| 850 | * from underneath us while we work (it may be truncated by |
| 851 | * a concurrent `trunc' or `open' for creation). |
| 852 | * 2) Link source to destination. If destination already exists, |
| 853 | * delete it first. |
| 854 | * 3) Unlink source reference to inode if still around. If a |
| 855 | * directory was moved and the parent of the destination |
| 856 | * is different from the source, patch the ".." entry in the |
| 857 | * directory. |
| 858 | * |
| 859 | * ufs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, |
| 860 | * struct componentname *a_fcnp, struct vnode *a_tdvp, |
| 861 | * struct vnode *a_tvp, struct componentname *a_tcnp) |
| 862 | */ |
| 863 | static |
| 864 | int |
| 865 | ufs_rename(struct vop_old_rename_args *ap) |
| 866 | { |
| 867 | struct vnode *tvp = ap->a_tvp; |
| 868 | struct vnode *tdvp = ap->a_tdvp; |
| 869 | struct vnode *fvp = ap->a_fvp; |
| 870 | struct vnode *fdvp = ap->a_fdvp; |
| 871 | struct componentname *tcnp = ap->a_tcnp; |
| 872 | struct componentname *fcnp = ap->a_fcnp; |
| 873 | struct thread *td = fcnp->cn_td; |
| 874 | struct inode *ip, *xp, *dp; |
| 875 | struct direct newdir; |
| 876 | ino_t oldparent = 0, newparent = 0; |
| 877 | int doingdirectory = 0; |
| 878 | int error = 0, ioflag; |
| 879 | |
| 880 | /* |
| 881 | * Check for cross-device rename. |
| 882 | */ |
| 883 | if ((fvp->v_mount != tdvp->v_mount) || |
| 884 | (tvp && (fvp->v_mount != tvp->v_mount))) { |
| 885 | error = EXDEV; |
| 886 | abortit: |
| 887 | if (tdvp == tvp) |
| 888 | vrele(tdvp); |
| 889 | else |
| 890 | vput(tdvp); |
| 891 | if (tvp) |
| 892 | vput(tvp); |
| 893 | vrele(fdvp); |
| 894 | vrele(fvp); |
| 895 | return (error); |
| 896 | } |
| 897 | |
| 898 | if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || |
| 899 | (VTOI(tdvp)->i_flags & APPEND))) { |
| 900 | error = EPERM; |
| 901 | goto abortit; |
| 902 | } |
| 903 | |
| 904 | /* |
| 905 | * Renaming a file to itself has no effect. The upper layers should |
| 906 | * not call us in that case. Temporarily just warn if they do. |
| 907 | */ |
| 908 | if (fvp == tvp) { |
| 909 | printf("ufs_rename: fvp == tvp (can't happen)\n"); |
| 910 | error = 0; |
| 911 | goto abortit; |
| 912 | } |
| 913 | |
| 914 | if ((error = vn_lock(fvp, LK_EXCLUSIVE, td)) != 0) |
| 915 | goto abortit; |
| 916 | |
| 917 | /* |
| 918 | * Note: now that fvp is locked we have to be sure to unlock it before |
| 919 | * using the 'abortit' target. |
| 920 | */ |
| 921 | dp = VTOI(fdvp); |
| 922 | ip = VTOI(fvp); |
| 923 | if (ip->i_nlink >= LINK_MAX) { |
| 924 | VOP_UNLOCK(fvp, 0, td); |
| 925 | error = EMLINK; |
| 926 | goto abortit; |
| 927 | } |
| 928 | if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) |
| 929 | || (dp->i_flags & APPEND)) { |
| 930 | VOP_UNLOCK(fvp, 0, td); |
| 931 | error = EPERM; |
| 932 | goto abortit; |
| 933 | } |
| 934 | if ((ip->i_mode & IFMT) == IFDIR) { |
| 935 | /* |
| 936 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
| 937 | */ |
| 938 | if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || |
| 939 | dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & CNP_ISDOTDOT || |
| 940 | (ip->i_flag & IN_RENAME)) { |
| 941 | VOP_UNLOCK(fvp, 0, td); |
| 942 | error = EINVAL; |
| 943 | goto abortit; |
| 944 | } |
| 945 | ip->i_flag |= IN_RENAME; |
| 946 | oldparent = dp->i_number; |
| 947 | doingdirectory = 1; |
| 948 | } |
| 949 | VN_KNOTE(fdvp, NOTE_WRITE); /* XXX right place? */ |
| 950 | |
| 951 | /* |
| 952 | * fvp still locked. ip->i_flag has IN_RENAME set if doingdirectory. |
| 953 | * Cleanup fvp requirements so we can unlock it. |
| 954 | * |
| 955 | * tvp and tdvp are locked. tvp may be NULL. Now that dp and xp |
| 956 | * is setup we can use the 'bad' target if we unlock fvp. We cannot |
| 957 | * use the abortit target anymore because of IN_RENAME. |
| 958 | */ |
| 959 | dp = VTOI(tdvp); |
| 960 | if (tvp) |
| 961 | xp = VTOI(tvp); |
| 962 | else |
| 963 | xp = NULL; |
| 964 | |
| 965 | /* |
| 966 | * 1) Bump link count while we're moving stuff |
| 967 | * around. If we crash somewhere before |
| 968 | * completing our work, the link count |
| 969 | * may be wrong, but correctable. |
| 970 | */ |
| 971 | ip->i_effnlink++; |
| 972 | ip->i_nlink++; |
| 973 | ip->i_flag |= IN_CHANGE; |
| 974 | if (DOINGSOFTDEP(fvp)) |
| 975 | softdep_change_linkcnt(ip); |
| 976 | if ((error = UFS_UPDATE(fvp, !(DOINGSOFTDEP(fvp) | |
| 977 | DOINGASYNC(fvp)))) != 0) { |
| 978 | VOP_UNLOCK(fvp, 0, td); |
| 979 | goto bad; |
| 980 | } |
| 981 | |
| 982 | /* |
| 983 | * If ".." must be changed (ie the directory gets a new |
| 984 | * parent) then the source directory must not be in the |
| 985 | * directory heirarchy above the target, as this would |
| 986 | * orphan everything below the source directory. Also |
| 987 | * the user must have write permission in the source so |
| 988 | * as to be able to change "..". We must repeat the call |
| 989 | * to namei, as the parent directory is unlocked by the |
| 990 | * call to checkpath(). |
| 991 | */ |
| 992 | error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td); |
| 993 | VOP_UNLOCK(fvp, 0, td); |
| 994 | |
| 995 | /* |
| 996 | * We are now back to where we were in that fvp, fdvp are unlocked |
| 997 | * and tvp, tdvp are locked. tvp may be NULL. IN_RENAME may be |
| 998 | * set. Only the bad target or, if we clean up tvp and tdvp, the |
| 999 | * out target, may be used. |
| 1000 | */ |
| 1001 | if (oldparent != dp->i_number) |
| 1002 | newparent = dp->i_number; |
| 1003 | if (doingdirectory && newparent) { |
| 1004 | if (error) /* write access check above */ |
| 1005 | goto bad; |
| 1006 | |
| 1007 | /* |
| 1008 | * Once we start messing with tvp and tdvp we cannot use the |
| 1009 | * 'bad' target, only finish cleaning tdvp and tvp up and |
| 1010 | * use the 'out' target. |
| 1011 | * |
| 1012 | * This cleans up tvp. |
| 1013 | */ |
| 1014 | if (xp != NULL) { |
| 1015 | vput(tvp); |
| 1016 | xp = NULL; |
| 1017 | } |
| 1018 | |
| 1019 | /* |
| 1020 | * This is a real mess. ufs_checkpath vput's the target |
| 1021 | * directory so retain an extra ref and note that tdvp will |
| 1022 | * lose its lock on return. This leaves us with one good |
| 1023 | * ref after ufs_checkpath returns. |
| 1024 | */ |
| 1025 | vref(tdvp); |
| 1026 | error = ufs_checkpath(ip, dp, tcnp->cn_cred); |
| 1027 | tcnp->cn_flags |= CNP_PDIRUNLOCK; |
| 1028 | if (error) { |
| 1029 | vrele(tdvp); |
| 1030 | goto out; |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | * relookup no longer messes with tdvp's refs. tdvp must be |
| 1035 | * unlocked on entry and will be locked on a successful |
| 1036 | * return. |
| 1037 | */ |
| 1038 | error = relookup(tdvp, &tvp, tcnp); |
| 1039 | if (error) { |
| 1040 | if (tcnp->cn_flags & CNP_PDIRUNLOCK) |
| 1041 | vrele(tdvp); |
| 1042 | else |
| 1043 | vput(tdvp); |
| 1044 | goto out; |
| 1045 | } |
| 1046 | KKASSERT((tcnp->cn_flags & CNP_PDIRUNLOCK) == 0); |
| 1047 | dp = VTOI(tdvp); |
| 1048 | if (tvp) |
| 1049 | xp = VTOI(tvp); |
| 1050 | } |
| 1051 | |
| 1052 | /* |
| 1053 | * We are back to fvp, fdvp unlocked, tvp, tdvp locked. tvp may |
| 1054 | * be NULL (xp will also be NULL in that case), and IN_RENAME will |
| 1055 | * be set if doingdirectory. This means we can use the 'bad' target |
| 1056 | * again. |
| 1057 | */ |
| 1058 | |
| 1059 | /* |
| 1060 | * 2) If target doesn't exist, link the target |
| 1061 | * to the source and unlink the source. |
| 1062 | * Otherwise, rewrite the target directory |
| 1063 | * entry to reference the source inode and |
| 1064 | * expunge the original entry's existence. |
| 1065 | */ |
| 1066 | if (xp == NULL) { |
| 1067 | if (dp->i_dev != ip->i_dev) |
| 1068 | panic("ufs_rename: EXDEV"); |
| 1069 | /* |
| 1070 | * Account for ".." in new directory. |
| 1071 | * When source and destination have the same |
| 1072 | * parent we don't fool with the link count. |
| 1073 | */ |
| 1074 | if (doingdirectory && newparent) { |
| 1075 | if ((nlink_t)dp->i_nlink >= LINK_MAX) { |
| 1076 | error = EMLINK; |
| 1077 | goto bad; |
| 1078 | } |
| 1079 | dp->i_effnlink++; |
| 1080 | dp->i_nlink++; |
| 1081 | dp->i_flag |= IN_CHANGE; |
| 1082 | if (DOINGSOFTDEP(tdvp)) |
| 1083 | softdep_change_linkcnt(dp); |
| 1084 | error = UFS_UPDATE(tdvp, !(DOINGSOFTDEP(tdvp) | |
| 1085 | DOINGASYNC(tdvp))); |
| 1086 | if (error) |
| 1087 | goto bad; |
| 1088 | } |
| 1089 | ufs_makedirentry(ip, tcnp, &newdir); |
| 1090 | error = ufs_direnter(tdvp, NULL, &newdir, tcnp, NULL); |
| 1091 | if (error) { |
| 1092 | if (doingdirectory && newparent) { |
| 1093 | dp->i_effnlink--; |
| 1094 | dp->i_nlink--; |
| 1095 | dp->i_flag |= IN_CHANGE; |
| 1096 | if (DOINGSOFTDEP(tdvp)) |
| 1097 | softdep_change_linkcnt(dp); |
| 1098 | (void)UFS_UPDATE(tdvp, 1); |
| 1099 | } |
| 1100 | goto bad; |
| 1101 | } |
| 1102 | VN_KNOTE(tdvp, NOTE_WRITE); |
| 1103 | vput(tdvp); |
| 1104 | } else { |
| 1105 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) |
| 1106 | panic("ufs_rename: EXDEV"); |
| 1107 | /* |
| 1108 | * Short circuit rename(foo, foo). |
| 1109 | */ |
| 1110 | if (xp->i_number == ip->i_number) |
| 1111 | panic("ufs_rename: same file"); |
| 1112 | /* |
| 1113 | * If the parent directory is "sticky", then the user must |
| 1114 | * own the parent directory, or the destination of the rename, |
| 1115 | * otherwise the destination may not be changed (except by |
| 1116 | * root). This implements append-only directories. |
| 1117 | */ |
| 1118 | if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && |
| 1119 | tcnp->cn_cred->cr_uid != dp->i_uid && |
| 1120 | xp->i_uid != tcnp->cn_cred->cr_uid) { |
| 1121 | error = EPERM; |
| 1122 | goto bad; |
| 1123 | } |
| 1124 | /* |
| 1125 | * Target must be empty if a directory and have no links |
| 1126 | * to it. Also, ensure source and target are compatible |
| 1127 | * (both directories, or both not directories). |
| 1128 | * |
| 1129 | * Purge the file or directory being replaced from the |
| 1130 | * nameccache. |
| 1131 | */ |
| 1132 | if ((xp->i_mode&IFMT) == IFDIR) { |
| 1133 | if ((xp->i_effnlink > 2) || |
| 1134 | !ufs_dirempty(xp, dp->i_number, tcnp->cn_cred)) { |
| 1135 | error = ENOTEMPTY; |
| 1136 | goto bad; |
| 1137 | } |
| 1138 | if (!doingdirectory) { |
| 1139 | error = ENOTDIR; |
| 1140 | goto bad; |
| 1141 | } |
| 1142 | /* cache_purge removed - handled by VFS compat layer */ |
| 1143 | } else if (doingdirectory == 0) { |
| 1144 | /* cache_purge removed - handled by VFS compat layer */ |
| 1145 | } else { |
| 1146 | error = EISDIR; |
| 1147 | goto bad; |
| 1148 | } |
| 1149 | /* |
| 1150 | * note: inode passed to ufs_dirrewrite() is 0 for a |
| 1151 | * non-directory file rename, 1 for a directory rename |
| 1152 | * in the same directory, and > 1 for an inode representing |
| 1153 | * the new directory. |
| 1154 | */ |
| 1155 | error = ufs_dirrewrite(dp, xp, ip->i_number, |
| 1156 | IFTODT(ip->i_mode), |
| 1157 | (doingdirectory && newparent) ? |
| 1158 | newparent : (ino_t)doingdirectory); |
| 1159 | if (error) |
| 1160 | goto bad; |
| 1161 | if (doingdirectory) { |
| 1162 | if (!newparent) { |
| 1163 | dp->i_effnlink--; |
| 1164 | if (DOINGSOFTDEP(tdvp)) |
| 1165 | softdep_change_linkcnt(dp); |
| 1166 | } |
| 1167 | xp->i_effnlink--; |
| 1168 | if (DOINGSOFTDEP(tvp)) |
| 1169 | softdep_change_linkcnt(xp); |
| 1170 | } |
| 1171 | if (doingdirectory && !DOINGSOFTDEP(tvp)) { |
| 1172 | /* |
| 1173 | * Truncate inode. The only stuff left in the directory |
| 1174 | * is "." and "..". The "." reference is inconsequential |
| 1175 | * since we are quashing it. We have removed the "." |
| 1176 | * reference and the reference in the parent directory, |
| 1177 | * but there may be other hard links. The soft |
| 1178 | * dependency code will arrange to do these operations |
| 1179 | * after the parent directory entry has been deleted on |
| 1180 | * disk, so when running with that code we avoid doing |
| 1181 | * them now. |
| 1182 | */ |
| 1183 | if (!newparent) { |
| 1184 | dp->i_nlink--; |
| 1185 | dp->i_flag |= IN_CHANGE; |
| 1186 | } |
| 1187 | xp->i_nlink--; |
| 1188 | xp->i_flag |= IN_CHANGE; |
| 1189 | ioflag = DOINGASYNC(tvp) ? 0 : IO_SYNC; |
| 1190 | if ((error = UFS_TRUNCATE(tvp, (off_t)0, ioflag, |
| 1191 | tcnp->cn_cred, tcnp->cn_td)) != 0) |
| 1192 | goto bad; |
| 1193 | } |
| 1194 | VN_KNOTE(tdvp, NOTE_WRITE); |
| 1195 | vput(tdvp); |
| 1196 | VN_KNOTE(tvp, NOTE_DELETE); |
| 1197 | vput(tvp); |
| 1198 | xp = NULL; |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | * tvp and tdvp have been cleaned up. only fvp and fdvp (both |
| 1203 | * unlocked) remain. We are about to overwrite fvp but we have to |
| 1204 | * keep 'ip' intact so we cannot release the old fvp, which is still |
| 1205 | * refd and accessible via ap->a_fvp. |
| 1206 | * |
| 1207 | * This means we cannot use either 'bad' or 'out' to cleanup any |
| 1208 | * more. |
| 1209 | */ |
| 1210 | |
| 1211 | /* |
| 1212 | * 3) Unlink the source. |
| 1213 | */ |
| 1214 | fcnp->cn_flags &= ~CNP_MODMASK; |
| 1215 | fcnp->cn_flags |= CNP_LOCKPARENT; |
| 1216 | error = relookup(fdvp, &fvp, fcnp); |
| 1217 | if (error || fvp == NULL) { |
| 1218 | /* |
| 1219 | * From name has disappeared. IN_RENAME will not be set if |
| 1220 | * we get past the panic so we don't have to clean it up. |
| 1221 | */ |
| 1222 | if (doingdirectory) |
| 1223 | panic("ufs_rename: lost dir entry"); |
| 1224 | vrele(ap->a_fvp); |
| 1225 | if (fcnp->cn_flags & CNP_PDIRUNLOCK) |
| 1226 | vrele(fdvp); |
| 1227 | else |
| 1228 | vput(fdvp); |
| 1229 | return(0); |
| 1230 | } |
| 1231 | KKASSERT((fcnp->cn_flags & CNP_PDIRUNLOCK) == 0); |
| 1232 | |
| 1233 | /* |
| 1234 | * fdvp and fvp are locked. |
| 1235 | */ |
| 1236 | xp = VTOI(fvp); |
| 1237 | dp = VTOI(fdvp); |
| 1238 | |
| 1239 | /* |
| 1240 | * Ensure that the directory entry still exists and has not |
| 1241 | * changed while the new name has been entered. If the source is |
| 1242 | * a file then the entry may have been unlinked or renamed. In |
| 1243 | * either case there is no further work to be done. If the source |
| 1244 | * is a directory then it cannot have been rmdir'ed; the IN_RENAME |
| 1245 | * flag ensures that it cannot be moved by another rename or removed |
| 1246 | * by a rmdir. Cleanup IN_RENAME. |
| 1247 | */ |
| 1248 | if (xp != ip) { |
| 1249 | if (doingdirectory) |
| 1250 | panic("ufs_rename: lost dir entry"); |
| 1251 | } else { |
| 1252 | /* |
| 1253 | * If the source is a directory with a |
| 1254 | * new parent, the link count of the old |
| 1255 | * parent directory must be decremented |
| 1256 | * and ".." set to point to the new parent. |
| 1257 | */ |
| 1258 | if (doingdirectory && newparent) { |
| 1259 | xp->i_offset = mastertemplate.dot_reclen; |
| 1260 | ufs_dirrewrite(xp, dp, newparent, DT_DIR, 0); |
| 1261 | /* cache_purge removed - handled by VFS compat layer */ |
| 1262 | } |
| 1263 | error = ufs_dirremove(fdvp, xp, fcnp->cn_flags, 0); |
| 1264 | xp->i_flag &= ~IN_RENAME; |
| 1265 | } |
| 1266 | |
| 1267 | VN_KNOTE(fvp, NOTE_RENAME); |
| 1268 | vput(fdvp); |
| 1269 | vput(fvp); |
| 1270 | vrele(ap->a_fvp); |
| 1271 | return (error); |
| 1272 | |
| 1273 | bad: |
| 1274 | if (xp) |
| 1275 | vput(ITOV(xp)); |
| 1276 | vput(ITOV(dp)); |
| 1277 | out: |
| 1278 | if (doingdirectory) |
| 1279 | ip->i_flag &= ~IN_RENAME; |
| 1280 | if (vn_lock(fvp, LK_EXCLUSIVE, td) == 0) { |
| 1281 | ip->i_effnlink--; |
| 1282 | ip->i_nlink--; |
| 1283 | ip->i_flag |= IN_CHANGE; |
| 1284 | ip->i_flag &= ~IN_RENAME; |
| 1285 | if (DOINGSOFTDEP(fvp)) |
| 1286 | softdep_change_linkcnt(ip); |
| 1287 | vput(fvp); |
| 1288 | } else { |
| 1289 | vrele(fvp); |
| 1290 | } |
| 1291 | return (error); |
| 1292 | } |
| 1293 | |
| 1294 | /* |
| 1295 | * Mkdir system call |
| 1296 | * |
| 1297 | * ufs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1298 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1299 | */ |
| 1300 | static |
| 1301 | int |
| 1302 | ufs_mkdir(struct vop_old_mkdir_args *ap) |
| 1303 | { |
| 1304 | struct vnode *dvp = ap->a_dvp; |
| 1305 | struct vattr *vap = ap->a_vap; |
| 1306 | struct componentname *cnp = ap->a_cnp; |
| 1307 | struct inode *ip, *dp; |
| 1308 | struct vnode *tvp; |
| 1309 | struct buf *bp; |
| 1310 | struct dirtemplate dirtemplate, *dtp; |
| 1311 | struct direct newdir; |
| 1312 | int error, dmode; |
| 1313 | long blkoff; |
| 1314 | |
| 1315 | dp = VTOI(dvp); |
| 1316 | if ((nlink_t)dp->i_nlink >= LINK_MAX) { |
| 1317 | error = EMLINK; |
| 1318 | goto out; |
| 1319 | } |
| 1320 | dmode = vap->va_mode & 0777; |
| 1321 | dmode |= IFDIR; |
| 1322 | /* |
| 1323 | * Must simulate part of ufs_makeinode here to acquire the inode, |
| 1324 | * but not have it entered in the parent directory. The entry is |
| 1325 | * made later after writing "." and ".." entries. |
| 1326 | */ |
| 1327 | error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, &tvp); |
| 1328 | if (error) |
| 1329 | goto out; |
| 1330 | ip = VTOI(tvp); |
| 1331 | ip->i_gid = dp->i_gid; |
| 1332 | #ifdef SUIDDIR |
| 1333 | { |
| 1334 | #ifdef QUOTA |
| 1335 | struct ucred ucred, *ucp; |
| 1336 | ucp = cnp->cn_cred; |
| 1337 | #endif |
| 1338 | /* |
| 1339 | * If we are hacking owners here, (only do this where told to) |
| 1340 | * and we are not giving it TO root, (would subvert quotas) |
| 1341 | * then go ahead and give it to the other user. |
| 1342 | * The new directory also inherits the SUID bit. |
| 1343 | * If user's UID and dir UID are the same, |
| 1344 | * 'give it away' so that the SUID is still forced on. |
| 1345 | */ |
| 1346 | if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) && |
| 1347 | (dp->i_mode & ISUID) && dp->i_uid) { |
| 1348 | dmode |= ISUID; |
| 1349 | ip->i_uid = dp->i_uid; |
| 1350 | #ifdef QUOTA |
| 1351 | if (dp->i_uid != cnp->cn_cred->cr_uid) { |
| 1352 | /* |
| 1353 | * Make sure the correct user gets charged |
| 1354 | * for the space. |
| 1355 | * Make a dummy credential for the victim. |
| 1356 | * XXX This seems to never be accessed out of |
| 1357 | * our context so a stack variable is ok. |
| 1358 | */ |
| 1359 | ucred.cr_ref = 1; |
| 1360 | ucred.cr_uid = ip->i_uid; |
| 1361 | ucred.cr_ngroups = 1; |
| 1362 | ucred.cr_groups[0] = dp->i_gid; |
| 1363 | ucp = &ucred; |
| 1364 | } |
| 1365 | #endif |
| 1366 | } else |
| 1367 | ip->i_uid = cnp->cn_cred->cr_uid; |
| 1368 | #ifdef QUOTA |
| 1369 | if ((error = getinoquota(ip)) || |
| 1370 | (error = chkiq(ip, 1, ucp, 0))) { |
| 1371 | UFS_VFREE(tvp, ip->i_number, dmode); |
| 1372 | vput(tvp); |
| 1373 | return (error); |
| 1374 | } |
| 1375 | #endif |
| 1376 | } |
| 1377 | #else /* !SUIDDIR */ |
| 1378 | ip->i_uid = cnp->cn_cred->cr_uid; |
| 1379 | #ifdef QUOTA |
| 1380 | if ((error = getinoquota(ip)) || |
| 1381 | (error = chkiq(ip, 1, cnp->cn_cred, 0))) { |
| 1382 | UFS_VFREE(tvp, ip->i_number, dmode); |
| 1383 | vput(tvp); |
| 1384 | return (error); |
| 1385 | } |
| 1386 | #endif |
| 1387 | #endif /* !SUIDDIR */ |
| 1388 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 1389 | ip->i_mode = dmode; |
| 1390 | tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ |
| 1391 | ip->i_effnlink = 2; |
| 1392 | ip->i_nlink = 2; |
| 1393 | if (DOINGSOFTDEP(tvp)) |
| 1394 | softdep_change_linkcnt(ip); |
| 1395 | if (cnp->cn_flags & CNP_ISWHITEOUT) |
| 1396 | ip->i_flags |= UF_OPAQUE; |
| 1397 | |
| 1398 | /* |
| 1399 | * Bump link count in parent directory to reflect work done below. |
| 1400 | * Should be done before reference is created so cleanup is |
| 1401 | * possible if we crash. |
| 1402 | */ |
| 1403 | dp->i_effnlink++; |
| 1404 | dp->i_nlink++; |
| 1405 | dp->i_flag |= IN_CHANGE; |
| 1406 | if (DOINGSOFTDEP(dvp)) |
| 1407 | softdep_change_linkcnt(dp); |
| 1408 | error = UFS_UPDATE(tvp, !(DOINGSOFTDEP(dvp) | DOINGASYNC(dvp))); |
| 1409 | if (error) |
| 1410 | goto bad; |
| 1411 | |
| 1412 | /* |
| 1413 | * Initialize directory with "." and ".." from static template. |
| 1414 | */ |
| 1415 | if (dvp->v_mount->mnt_maxsymlinklen > 0 |
| 1416 | ) |
| 1417 | dtp = &mastertemplate; |
| 1418 | else |
| 1419 | dtp = (struct dirtemplate *)&omastertemplate; |
| 1420 | dirtemplate = *dtp; |
| 1421 | dirtemplate.dot_ino = ip->i_number; |
| 1422 | dirtemplate.dotdot_ino = dp->i_number; |
| 1423 | if ((error = VOP_BALLOC(tvp, (off_t)0, DIRBLKSIZ, cnp->cn_cred, |
| 1424 | B_CLRBUF, &bp)) != 0) |
| 1425 | goto bad; |
| 1426 | ip->i_size = DIRBLKSIZ; |
| 1427 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
| 1428 | vnode_pager_setsize(tvp, (u_long)ip->i_size); |
| 1429 | bcopy((caddr_t)&dirtemplate, (caddr_t)bp->b_data, sizeof dirtemplate); |
| 1430 | if (DOINGSOFTDEP(tvp)) { |
| 1431 | /* |
| 1432 | * Ensure that the entire newly allocated block is a |
| 1433 | * valid directory so that future growth within the |
| 1434 | * block does not have to ensure that the block is |
| 1435 | * written before the inode. |
| 1436 | */ |
| 1437 | blkoff = DIRBLKSIZ; |
| 1438 | while (blkoff < bp->b_bcount) { |
| 1439 | ((struct direct *) |
| 1440 | (bp->b_data + blkoff))->d_reclen = DIRBLKSIZ; |
| 1441 | blkoff += DIRBLKSIZ; |
| 1442 | } |
| 1443 | } |
| 1444 | if ((error = UFS_UPDATE(tvp, !(DOINGSOFTDEP(tvp) | |
| 1445 | DOINGASYNC(tvp)))) != 0) { |
| 1446 | VOP_BWRITE(bp->b_vp, bp); |
| 1447 | goto bad; |
| 1448 | } |
| 1449 | /* |
| 1450 | * Directory set up, now install its entry in the parent directory. |
| 1451 | * |
| 1452 | * If we are not doing soft dependencies, then we must write out the |
| 1453 | * buffer containing the new directory body before entering the new |
| 1454 | * name in the parent. If we are doing soft dependencies, then the |
| 1455 | * buffer containing the new directory body will be passed to and |
| 1456 | * released in the soft dependency code after the code has attached |
| 1457 | * an appropriate ordering dependency to the buffer which ensures that |
| 1458 | * the buffer is written before the new name is written in the parent. |
| 1459 | */ |
| 1460 | if (DOINGASYNC(dvp)) |
| 1461 | bdwrite(bp); |
| 1462 | else if (!DOINGSOFTDEP(dvp) && ((error = VOP_BWRITE(bp->b_vp, bp)))) |
| 1463 | goto bad; |
| 1464 | ufs_makedirentry(ip, cnp, &newdir); |
| 1465 | error = ufs_direnter(dvp, tvp, &newdir, cnp, bp); |
| 1466 | |
| 1467 | bad: |
| 1468 | if (error == 0) { |
| 1469 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 1470 | *ap->a_vpp = tvp; |
| 1471 | } else { |
| 1472 | dp->i_effnlink--; |
| 1473 | dp->i_nlink--; |
| 1474 | dp->i_flag |= IN_CHANGE; |
| 1475 | if (DOINGSOFTDEP(dvp)) |
| 1476 | softdep_change_linkcnt(dp); |
| 1477 | /* |
| 1478 | * No need to do an explicit VOP_TRUNCATE here, vrele will |
| 1479 | * do this for us because we set the link count to 0. |
| 1480 | */ |
| 1481 | ip->i_effnlink = 0; |
| 1482 | ip->i_nlink = 0; |
| 1483 | ip->i_flag |= IN_CHANGE; |
| 1484 | if (DOINGSOFTDEP(tvp)) |
| 1485 | softdep_change_linkcnt(ip); |
| 1486 | vput(tvp); |
| 1487 | } |
| 1488 | out: |
| 1489 | return (error); |
| 1490 | } |
| 1491 | |
| 1492 | /* |
| 1493 | * Rmdir system call. |
| 1494 | * |
| 1495 | * ufs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, |
| 1496 | * struct componentname *a_cnp) |
| 1497 | */ |
| 1498 | static |
| 1499 | int |
| 1500 | ufs_rmdir(struct vop_old_rmdir_args *ap) |
| 1501 | { |
| 1502 | struct vnode *vp = ap->a_vp; |
| 1503 | struct vnode *dvp = ap->a_dvp; |
| 1504 | struct componentname *cnp = ap->a_cnp; |
| 1505 | struct inode *ip, *dp; |
| 1506 | int error, ioflag; |
| 1507 | |
| 1508 | ip = VTOI(vp); |
| 1509 | dp = VTOI(dvp); |
| 1510 | |
| 1511 | /* |
| 1512 | * Do not remove a directory that is in the process of being renamed. |
| 1513 | * Verify the directory is empty (and valid). Rmdir ".." will not be |
| 1514 | * valid since ".." will contain a reference to the current directory |
| 1515 | * and thus be non-empty. Do not allow the removal of mounted on |
| 1516 | * directories (this can happen when an NFS exported filesystem |
| 1517 | * tries to remove a locally mounted on directory). |
| 1518 | */ |
| 1519 | error = 0; |
| 1520 | if (ip->i_flag & IN_RENAME) { |
| 1521 | error = EINVAL; |
| 1522 | goto out; |
| 1523 | } |
| 1524 | if (ip->i_effnlink != 2 || |
| 1525 | !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { |
| 1526 | error = ENOTEMPTY; |
| 1527 | goto out; |
| 1528 | } |
| 1529 | if ((dp->i_flags & APPEND) |
| 1530 | || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) { |
| 1531 | error = EPERM; |
| 1532 | goto out; |
| 1533 | } |
| 1534 | if (vp->v_mountedhere != 0) { |
| 1535 | error = EINVAL; |
| 1536 | goto out; |
| 1537 | } |
| 1538 | /* |
| 1539 | * Delete reference to directory before purging |
| 1540 | * inode. If we crash in between, the directory |
| 1541 | * will be reattached to lost+found, |
| 1542 | */ |
| 1543 | dp->i_effnlink--; |
| 1544 | ip->i_effnlink--; |
| 1545 | if (DOINGSOFTDEP(vp)) { |
| 1546 | softdep_change_linkcnt(dp); |
| 1547 | softdep_change_linkcnt(ip); |
| 1548 | } |
| 1549 | error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1); |
| 1550 | if (error) { |
| 1551 | dp->i_effnlink++; |
| 1552 | ip->i_effnlink++; |
| 1553 | if (DOINGSOFTDEP(vp)) { |
| 1554 | softdep_change_linkcnt(dp); |
| 1555 | softdep_change_linkcnt(ip); |
| 1556 | } |
| 1557 | goto out; |
| 1558 | } |
| 1559 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 1560 | /* |
| 1561 | * Truncate inode. The only stuff left in the directory is "." and |
| 1562 | * "..". The "." reference is inconsequential since we are quashing |
| 1563 | * it. The soft dependency code will arrange to do these operations |
| 1564 | * after the parent directory entry has been deleted on disk, so |
| 1565 | * when running with that code we avoid doing them now. |
| 1566 | */ |
| 1567 | if (!DOINGSOFTDEP(vp)) { |
| 1568 | dp->i_nlink--; |
| 1569 | dp->i_flag |= IN_CHANGE; |
| 1570 | ip->i_nlink--; |
| 1571 | ip->i_flag |= IN_CHANGE; |
| 1572 | ioflag = DOINGASYNC(vp) ? 0 : IO_SYNC; |
| 1573 | error = UFS_TRUNCATE(vp, (off_t)0, ioflag, cnp->cn_cred, |
| 1574 | cnp->cn_td); |
| 1575 | } |
| 1576 | /* cache_purge removed - handled by VFS compat layer */ |
| 1577 | #ifdef UFS_DIRHASH |
| 1578 | /* Kill any active hash; i_effnlink == 0, so it will not come back. */ |
| 1579 | if (ip->i_dirhash != NULL) |
| 1580 | ufsdirhash_free(ip); |
| 1581 | #endif |
| 1582 | out: |
| 1583 | VN_KNOTE(vp, NOTE_DELETE); |
| 1584 | return (error); |
| 1585 | } |
| 1586 | |
| 1587 | /* |
| 1588 | * symlink -- make a symbolic link |
| 1589 | * |
| 1590 | * ufs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1591 | * struct componentname *a_cnp, struct vattr *a_vap, |
| 1592 | * char *a_target) |
| 1593 | */ |
| 1594 | static |
| 1595 | int |
| 1596 | ufs_symlink(struct vop_old_symlink_args *ap) |
| 1597 | { |
| 1598 | struct vnode *vp, **vpp = ap->a_vpp; |
| 1599 | struct inode *ip; |
| 1600 | int len, error; |
| 1601 | |
| 1602 | error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, |
| 1603 | vpp, ap->a_cnp); |
| 1604 | if (error) |
| 1605 | return (error); |
| 1606 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
| 1607 | vp = *vpp; |
| 1608 | len = strlen(ap->a_target); |
| 1609 | if (len < vp->v_mount->mnt_maxsymlinklen) { |
| 1610 | ip = VTOI(vp); |
| 1611 | bcopy(ap->a_target, (char *)ip->i_shortlink, len); |
| 1612 | ip->i_size = len; |
| 1613 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
| 1614 | } else |
| 1615 | error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, |
| 1616 | UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, |
| 1617 | (int *)0, NULL); |
| 1618 | if (error) |
| 1619 | vput(vp); |
| 1620 | return (error); |
| 1621 | } |
| 1622 | |
| 1623 | /* |
| 1624 | * Vnode op for reading directories. |
| 1625 | * |
| 1626 | * The routine below assumes that the on-disk format of a directory |
| 1627 | * is the same as that defined by <sys/dirent.h>. If the on-disk |
| 1628 | * format changes, then it will be necessary to do a conversion |
| 1629 | * from the on-disk format that read returns to the format defined |
| 1630 | * by <sys/dirent.h>. |
| 1631 | * |
| 1632 | * ufs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, |
| 1633 | * int *a_eofflag, int *ncookies, u_long **a_cookies) |
| 1634 | */ |
| 1635 | static |
| 1636 | int |
| 1637 | ufs_readdir(struct vop_readdir_args *ap) |
| 1638 | { |
| 1639 | struct uio *uio = ap->a_uio; |
| 1640 | int count, error; |
| 1641 | |
| 1642 | struct direct *edp, *dp; |
| 1643 | int ncookies; |
| 1644 | struct uio auio; |
| 1645 | struct iovec aiov; |
| 1646 | caddr_t dirbuf; |
| 1647 | int readcnt, retval; |
| 1648 | off_t startoffset = uio->uio_offset; |
| 1649 | |
| 1650 | count = uio->uio_resid; |
| 1651 | /* |
| 1652 | * Avoid complications for partial directory entries by adjusting |
| 1653 | * the i/o to end at a block boundary. Don't give up (like the old ufs |
| 1654 | * does) if the initial adjustment gives a negative count, since |
| 1655 | * many callers don't supply a large enough buffer. The correct |
| 1656 | * size is a little larger than DIRBLKSIZ to allow for expansion |
| 1657 | * of directory entries, but some callers just use 512. |
| 1658 | */ |
| 1659 | count -= (uio->uio_offset + count) & (DIRBLKSIZ -1); |
| 1660 | if (count <= 0) |
| 1661 | count += DIRBLKSIZ; |
| 1662 | |
| 1663 | auio = *uio; |
| 1664 | auio.uio_iov = &aiov; |
| 1665 | auio.uio_iovcnt = 1; |
| 1666 | auio.uio_resid = count; |
| 1667 | auio.uio_segflg = UIO_SYSSPACE; |
| 1668 | aiov.iov_len = count; |
| 1669 | MALLOC(dirbuf, caddr_t, count, M_TEMP, M_WAITOK); |
| 1670 | aiov.iov_base = dirbuf; |
| 1671 | error = VOP_READ(ap->a_vp, &auio, 0, ap->a_cred); |
| 1672 | if (error == 0) { |
| 1673 | readcnt = count - auio.uio_resid; |
| 1674 | edp = (struct direct *)&dirbuf[readcnt]; |
| 1675 | ncookies = 0; |
| 1676 | for (dp = (struct direct *)dirbuf; |
| 1677 | !error && uio->uio_resid > 0 && dp < edp; ) { |
| 1678 | if (dp->d_reclen <= 0) { |
| 1679 | error = EIO; |
| 1680 | break; |
| 1681 | } |
| 1682 | #if BYTE_ORDER == LITTLE_ENDIAN |
| 1683 | if (OFSFMT(ap->a_vp)) { |
| 1684 | retval = vop_write_dirent(&error, uio, |
| 1685 | dp->d_ino, dp->d_namlen, dp->d_type, |
| 1686 | dp->d_name); |
| 1687 | } else |
| 1688 | #endif |
| 1689 | { |
| 1690 | retval = vop_write_dirent(&error, uio, |
| 1691 | dp->d_ino, dp->d_type, dp->d_namlen, |
| 1692 | dp->d_name); |
| 1693 | } |
| 1694 | |
| 1695 | if (retval) |
| 1696 | break; |
| 1697 | /* advance dp */ |
| 1698 | dp = (struct direct *)((char *)dp + dp->d_reclen); |
| 1699 | if (!error) |
| 1700 | ncookies++; |
| 1701 | } |
| 1702 | /* we need to correct uio_offset */ |
| 1703 | uio->uio_offset = startoffset + (caddr_t)dp - dirbuf; |
| 1704 | |
| 1705 | if (!error && ap->a_ncookies != NULL) { |
| 1706 | u_long *cookiep, *cookies, *ecookies; |
| 1707 | off_t off; |
| 1708 | |
| 1709 | if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) |
| 1710 | panic("ufs_readdir: unexpected uio from NFS server"); |
| 1711 | MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, |
| 1712 | M_WAITOK); |
| 1713 | off = startoffset; |
| 1714 | for (dp = (struct direct *)dirbuf, |
| 1715 | cookiep = cookies, ecookies = cookies + ncookies; |
| 1716 | cookiep < ecookies; |
| 1717 | dp = (struct direct *)((caddr_t) dp + dp->d_reclen)) { |
| 1718 | off += dp->d_reclen; |
| 1719 | *cookiep++ = (u_long) off; |
| 1720 | } |
| 1721 | *ap->a_ncookies = ncookies; |
| 1722 | *ap->a_cookies = cookies; |
| 1723 | } |
| 1724 | } |
| 1725 | FREE(dirbuf, M_TEMP); |
| 1726 | if (ap->a_eofflag) |
| 1727 | *ap->a_eofflag = VTOI(ap->a_vp)->i_size <= uio->uio_offset; |
| 1728 | return (error); |
| 1729 | } |
| 1730 | |
| 1731 | /* |
| 1732 | * Return target name of a symbolic link |
| 1733 | * |
| 1734 | * ufs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) |
| 1735 | */ |
| 1736 | static |
| 1737 | int |
| 1738 | ufs_readlink(struct vop_readlink_args *ap) |
| 1739 | { |
| 1740 | struct vnode *vp = ap->a_vp; |
| 1741 | struct inode *ip = VTOI(vp); |
| 1742 | int isize; |
| 1743 | |
| 1744 | isize = ip->i_size; |
| 1745 | if ((isize < vp->v_mount->mnt_maxsymlinklen) || |
| 1746 | (ip->i_din.di_blocks == 0)) { /* XXX - for old fastlink support */ |
| 1747 | uiomove((char *)ip->i_shortlink, isize, ap->a_uio); |
| 1748 | return (0); |
| 1749 | } |
| 1750 | return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); |
| 1751 | } |
| 1752 | |
| 1753 | /* |
| 1754 | * Calculate the logical to physical mapping if not done already, |
| 1755 | * then call the device strategy routine. |
| 1756 | * |
| 1757 | * In order to be able to swap to a file, the VOP_BMAP operation may not |
| 1758 | * deadlock on memory. See ufs_bmap() for details. |
| 1759 | * |
| 1760 | * ufs_strategy(struct vnode *a_vp, struct bio *a_bio) |
| 1761 | */ |
| 1762 | static |
| 1763 | int |
| 1764 | ufs_strategy(struct vop_strategy_args *ap) |
| 1765 | { |
| 1766 | struct bio *bio = ap->a_bio; |
| 1767 | struct bio *nbio; |
| 1768 | struct buf *bp = bio->bio_buf; |
| 1769 | struct vnode *vp = ap->a_vp; |
| 1770 | struct inode *ip; |
| 1771 | int error; |
| 1772 | |
| 1773 | ip = VTOI(vp); |
| 1774 | if (vp->v_type == VBLK || vp->v_type == VCHR) |
| 1775 | panic("ufs_strategy: spec"); |
| 1776 | nbio = push_bio(bio); |
| 1777 | if (nbio->bio_offset == NOOFFSET) { |
| 1778 | error = VOP_BMAP(vp, bio->bio_offset, NULL, &nbio->bio_offset, |
| 1779 | NULL, NULL); |
| 1780 | if (error) { |
| 1781 | bp->b_error = error; |
| 1782 | bp->b_flags |= B_ERROR; |
| 1783 | /* I/O was never started on nbio, must biodone(bio) */ |
| 1784 | biodone(bio); |
| 1785 | return (error); |
| 1786 | } |
| 1787 | if (nbio->bio_offset == NOOFFSET) |
| 1788 | vfs_bio_clrbuf(bp); |
| 1789 | } |
| 1790 | if (nbio->bio_offset == NOOFFSET) { |
| 1791 | /* I/O was never started on nbio, must biodone(bio) */ |
| 1792 | biodone(bio); |
| 1793 | return (0); |
| 1794 | } |
| 1795 | vn_strategy(ip->i_devvp, nbio); |
| 1796 | return (0); |
| 1797 | } |
| 1798 | |
| 1799 | /* |
| 1800 | * Print out the contents of an inode. |
| 1801 | * |
| 1802 | * ufs_print(struct vnode *a_vp) |
| 1803 | */ |
| 1804 | static |
| 1805 | int |
| 1806 | ufs_print(struct vop_print_args *ap) |
| 1807 | { |
| 1808 | struct vnode *vp = ap->a_vp; |
| 1809 | struct inode *ip = VTOI(vp); |
| 1810 | |
| 1811 | printf("tag VT_UFS, ino %lu, on dev %s (%d, %d)", |
| 1812 | (u_long)ip->i_number, devtoname(ip->i_dev), major(ip->i_dev), |
| 1813 | minor(ip->i_dev)); |
| 1814 | if (vp->v_type == VFIFO) |
| 1815 | fifo_printinfo(vp); |
| 1816 | lockmgr_printinfo(&vp->v_lock); |
| 1817 | printf("\n"); |
| 1818 | return (0); |
| 1819 | } |
| 1820 | |
| 1821 | /* |
| 1822 | * Read wrapper for special devices. |
| 1823 | * |
| 1824 | * ufsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 1825 | * struct ucred *a_cred) |
| 1826 | */ |
| 1827 | static |
| 1828 | int |
| 1829 | ufsspec_read(struct vop_read_args *ap) |
| 1830 | { |
| 1831 | int error, resid; |
| 1832 | struct inode *ip; |
| 1833 | struct uio *uio; |
| 1834 | |
| 1835 | uio = ap->a_uio; |
| 1836 | resid = uio->uio_resid; |
| 1837 | error = VOCALL(spec_vnode_vops, &ap->a_head); |
| 1838 | /* |
| 1839 | * The inode may have been revoked during the call, so it must not |
| 1840 | * be accessed blindly here or in the other wrapper functions. |
| 1841 | */ |
| 1842 | ip = VTOI(ap->a_vp); |
| 1843 | if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0))) |
| 1844 | ip->i_flag |= IN_ACCESS; |
| 1845 | return (error); |
| 1846 | } |
| 1847 | |
| 1848 | /* |
| 1849 | * Write wrapper for special devices. |
| 1850 | * |
| 1851 | * ufsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 1852 | * struct ucred *a_cred) |
| 1853 | */ |
| 1854 | static |
| 1855 | int |
| 1856 | ufsspec_write(struct vop_write_args *ap) |
| 1857 | { |
| 1858 | int error, resid; |
| 1859 | struct inode *ip; |
| 1860 | struct uio *uio; |
| 1861 | |
| 1862 | uio = ap->a_uio; |
| 1863 | resid = uio->uio_resid; |
| 1864 | error = VOCALL(spec_vnode_vops, &ap->a_head); |
| 1865 | ip = VTOI(ap->a_vp); |
| 1866 | if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0))) |
| 1867 | VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE; |
| 1868 | return (error); |
| 1869 | } |
| 1870 | |
| 1871 | /* |
| 1872 | * Close wrapper for special devices. |
| 1873 | * |
| 1874 | * Update the times on the inode then do device close. |
| 1875 | * |
| 1876 | * ufsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, |
| 1877 | * struct thread *a_td) |
| 1878 | */ |
| 1879 | static |
| 1880 | int |
| 1881 | ufsspec_close(struct vop_close_args *ap) |
| 1882 | { |
| 1883 | struct vnode *vp = ap->a_vp; |
| 1884 | |
| 1885 | if (vp->v_usecount > 1) |
| 1886 | ufs_itimes(vp); |
| 1887 | return (VOCALL(spec_vnode_vops, &ap->a_head)); |
| 1888 | } |
| 1889 | |
| 1890 | /* |
| 1891 | * Read wrapper for fifos. |
| 1892 | * |
| 1893 | * ufsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 1894 | * struct ucred *a_cred) |
| 1895 | */ |
| 1896 | static |
| 1897 | int |
| 1898 | ufsfifo_read(struct vop_read_args *ap) |
| 1899 | { |
| 1900 | int error, resid; |
| 1901 | struct inode *ip; |
| 1902 | struct uio *uio; |
| 1903 | |
| 1904 | uio = ap->a_uio; |
| 1905 | resid = uio->uio_resid; |
| 1906 | error = VOCALL(fifo_vnode_vops, &ap->a_head); |
| 1907 | ip = VTOI(ap->a_vp); |
| 1908 | if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) == 0 && ip != NULL && |
| 1909 | (uio->uio_resid != resid || (error == 0 && resid != 0))) |
| 1910 | VTOI(ap->a_vp)->i_flag |= IN_ACCESS; |
| 1911 | return (error); |
| 1912 | } |
| 1913 | |
| 1914 | /* |
| 1915 | * Write wrapper for fifos. |
| 1916 | * |
| 1917 | * ufsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 1918 | * struct ucred *a_cred) |
| 1919 | */ |
| 1920 | static |
| 1921 | int |
| 1922 | ufsfifo_write(struct vop_write_args *ap) |
| 1923 | { |
| 1924 | int error, resid; |
| 1925 | struct inode *ip; |
| 1926 | struct uio *uio; |
| 1927 | |
| 1928 | uio = ap->a_uio; |
| 1929 | resid = uio->uio_resid; |
| 1930 | error = VOCALL(fifo_vnode_vops, &ap->a_head); |
| 1931 | ip = VTOI(ap->a_vp); |
| 1932 | if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0))) |
| 1933 | VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE; |
| 1934 | return (error); |
| 1935 | } |
| 1936 | |
| 1937 | /* |
| 1938 | * Close wrapper for fifos. |
| 1939 | * |
| 1940 | * Update the times on the inode then do device close. |
| 1941 | * |
| 1942 | * ufsfifo_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, |
| 1943 | * struct thread *a_td) |
| 1944 | */ |
| 1945 | static |
| 1946 | int |
| 1947 | ufsfifo_close(struct vop_close_args *ap) |
| 1948 | { |
| 1949 | struct vnode *vp = ap->a_vp; |
| 1950 | |
| 1951 | if (vp->v_usecount > 1) |
| 1952 | ufs_itimes(vp); |
| 1953 | return (VOCALL(fifo_vnode_vops, &ap->a_head)); |
| 1954 | } |
| 1955 | |
| 1956 | /* |
| 1957 | * Kqfilter wrapper for fifos. |
| 1958 | * |
| 1959 | * Fall through to ufs kqfilter routines if needed |
| 1960 | */ |
| 1961 | static |
| 1962 | int |
| 1963 | ufsfifo_kqfilter(struct vop_kqfilter_args *ap) |
| 1964 | { |
| 1965 | int error; |
| 1966 | |
| 1967 | error = VOCALL(fifo_vnode_vops, &ap->a_head); |
| 1968 | if (error) |
| 1969 | error = ufs_kqfilter(ap); |
| 1970 | return (error); |
| 1971 | } |
| 1972 | |
| 1973 | /* |
| 1974 | * Return POSIX pathconf information applicable to ufs filesystems. |
| 1975 | * |
| 1976 | * ufs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) |
| 1977 | */ |
| 1978 | static |
| 1979 | int |
| 1980 | ufs_pathconf(struct vop_pathconf_args *ap) |
| 1981 | { |
| 1982 | switch (ap->a_name) { |
| 1983 | case _PC_LINK_MAX: |
| 1984 | *ap->a_retval = LINK_MAX; |
| 1985 | return (0); |
| 1986 | case _PC_NAME_MAX: |
| 1987 | *ap->a_retval = NAME_MAX; |
| 1988 | return (0); |
| 1989 | case _PC_PATH_MAX: |
| 1990 | *ap->a_retval = PATH_MAX; |
| 1991 | return (0); |
| 1992 | case _PC_PIPE_BUF: |
| 1993 | *ap->a_retval = PIPE_BUF; |
| 1994 | return (0); |
| 1995 | case _PC_CHOWN_RESTRICTED: |
| 1996 | *ap->a_retval = 1; |
| 1997 | return (0); |
| 1998 | case _PC_NO_TRUNC: |
| 1999 | *ap->a_retval = 1; |
| 2000 | return (0); |
| 2001 | default: |
| 2002 | return (EINVAL); |
| 2003 | } |
| 2004 | /* NOTREACHED */ |
| 2005 | } |
| 2006 | |
| 2007 | /* |
| 2008 | * Advisory record locking support |
| 2009 | * |
| 2010 | * ufs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, |
| 2011 | * int a_flags) |
| 2012 | */ |
| 2013 | static |
| 2014 | int |
| 2015 | ufs_advlock(struct vop_advlock_args *ap) |
| 2016 | { |
| 2017 | struct inode *ip = VTOI(ap->a_vp); |
| 2018 | |
| 2019 | return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); |
| 2020 | } |
| 2021 | |
| 2022 | /* |
| 2023 | * Initialize the vnode associated with a new inode, handle aliased |
| 2024 | * vnodes. |
| 2025 | */ |
| 2026 | int |
| 2027 | ufs_vinit(struct mount *mntp, struct vnode **vpp) |
| 2028 | { |
| 2029 | struct inode *ip; |
| 2030 | struct vnode *vp; |
| 2031 | struct timeval tv; |
| 2032 | |
| 2033 | vp = *vpp; |
| 2034 | ip = VTOI(vp); |
| 2035 | |
| 2036 | switch(vp->v_type = IFTOVT(ip->i_mode)) { |
| 2037 | case VCHR: |
| 2038 | case VBLK: |
| 2039 | vp->v_ops = &mntp->mnt_vn_spec_ops; |
| 2040 | addaliasu(vp, ip->i_rdev); |
| 2041 | break; |
| 2042 | case VFIFO: |
| 2043 | vp->v_ops = &mntp->mnt_vn_fifo_ops; |
| 2044 | break; |
| 2045 | default: |
| 2046 | break; |
| 2047 | |
| 2048 | } |
| 2049 | |
| 2050 | if (ip->i_number == ROOTINO) |
| 2051 | vp->v_flag |= VROOT; |
| 2052 | /* |
| 2053 | * Initialize modrev times |
| 2054 | */ |
| 2055 | getmicrouptime(&tv); |
| 2056 | SETHIGH(ip->i_modrev, tv.tv_sec); |
| 2057 | SETLOW(ip->i_modrev, tv.tv_usec * 4294); |
| 2058 | *vpp = vp; |
| 2059 | return (0); |
| 2060 | } |
| 2061 | |
| 2062 | /* |
| 2063 | * Allocate a new inode. |
| 2064 | */ |
| 2065 | static |
| 2066 | int |
| 2067 | ufs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp, |
| 2068 | struct componentname *cnp) |
| 2069 | { |
| 2070 | struct inode *ip, *pdir; |
| 2071 | struct direct newdir; |
| 2072 | struct vnode *tvp; |
| 2073 | int error; |
| 2074 | |
| 2075 | pdir = VTOI(dvp); |
| 2076 | *vpp = NULL; |
| 2077 | if ((mode & IFMT) == 0) |
| 2078 | mode |= IFREG; |
| 2079 | |
| 2080 | error = UFS_VALLOC(dvp, mode, cnp->cn_cred, &tvp); |
| 2081 | if (error) |
| 2082 | return (error); |
| 2083 | ip = VTOI(tvp); |
| 2084 | ip->i_gid = pdir->i_gid; |
| 2085 | #ifdef SUIDDIR |
| 2086 | { |
| 2087 | #ifdef QUOTA |
| 2088 | struct ucred ucred, *ucp; |
| 2089 | ucp = cnp->cn_cred; |
| 2090 | #endif |
| 2091 | /* |
| 2092 | * If we are not the owner of the directory, |
| 2093 | * and we are hacking owners here, (only do this where told to) |
| 2094 | * and we are not giving it TO root, (would subvert quotas) |
| 2095 | * then go ahead and give it to the other user. |
| 2096 | * Note that this drops off the execute bits for security. |
| 2097 | */ |
| 2098 | if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) && |
| 2099 | (pdir->i_mode & ISUID) && |
| 2100 | (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) { |
| 2101 | ip->i_uid = pdir->i_uid; |
| 2102 | mode &= ~07111; |
| 2103 | #ifdef QUOTA |
| 2104 | /* |
| 2105 | * Make sure the correct user gets charged |
| 2106 | * for the space. |
| 2107 | * Quickly knock up a dummy credential for the victim. |
| 2108 | * XXX This seems to never be accessed out of our |
| 2109 | * context so a stack variable is ok. |
| 2110 | */ |
| 2111 | ucred.cr_ref = 1; |
| 2112 | ucred.cr_uid = ip->i_uid; |
| 2113 | ucred.cr_ngroups = 1; |
| 2114 | ucred.cr_groups[0] = pdir->i_gid; |
| 2115 | ucp = &ucred; |
| 2116 | #endif |
| 2117 | } else |
| 2118 | ip->i_uid = cnp->cn_cred->cr_uid; |
| 2119 | |
| 2120 | #ifdef QUOTA |
| 2121 | if ((error = getinoquota(ip)) || |
| 2122 | (error = chkiq(ip, 1, ucp, 0))) { |
| 2123 | UFS_VFREE(tvp, ip->i_number, mode); |
| 2124 | vput(tvp); |
| 2125 | return (error); |
| 2126 | } |
| 2127 | #endif |
| 2128 | } |
| 2129 | #else /* !SUIDDIR */ |
| 2130 | ip->i_uid = cnp->cn_cred->cr_uid; |
| 2131 | #ifdef QUOTA |
| 2132 | if ((error = getinoquota(ip)) || |
| 2133 | (error = chkiq(ip, 1, cnp->cn_cred, 0))) { |
| 2134 | UFS_VFREE(tvp, ip->i_number, mode); |
| 2135 | vput(tvp); |
| 2136 | return (error); |
| 2137 | } |
| 2138 | #endif |
| 2139 | #endif /* !SUIDDIR */ |
| 2140 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 2141 | ip->i_mode = mode; |
| 2142 | tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ |
| 2143 | ip->i_effnlink = 1; |
| 2144 | ip->i_nlink = 1; |
| 2145 | if (DOINGSOFTDEP(tvp)) |
| 2146 | softdep_change_linkcnt(ip); |
| 2147 | if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) && |
| 2148 | suser_cred(cnp->cn_cred, 0)) { |
| 2149 | ip->i_mode &= ~ISGID; |
| 2150 | } |
| 2151 | |
| 2152 | if (cnp->cn_flags & CNP_ISWHITEOUT) |
| 2153 | ip->i_flags |= UF_OPAQUE; |
| 2154 | |
| 2155 | /* |
| 2156 | * Make sure inode goes to disk before directory entry. |
| 2157 | */ |
| 2158 | error = UFS_UPDATE(tvp, !(DOINGSOFTDEP(tvp) | DOINGASYNC(tvp))); |
| 2159 | if (error) |
| 2160 | goto bad; |
| 2161 | ufs_makedirentry(ip, cnp, &newdir); |
| 2162 | error = ufs_direnter(dvp, tvp, &newdir, cnp, NULL); |
| 2163 | if (error) |
| 2164 | goto bad; |
| 2165 | *vpp = tvp; |
| 2166 | return (0); |
| 2167 | |
| 2168 | bad: |
| 2169 | /* |
| 2170 | * Write error occurred trying to update the inode |
| 2171 | * or the directory so must deallocate the inode. |
| 2172 | */ |
| 2173 | ip->i_effnlink = 0; |
| 2174 | ip->i_nlink = 0; |
| 2175 | ip->i_flag |= IN_CHANGE; |
| 2176 | if (DOINGSOFTDEP(tvp)) |
| 2177 | softdep_change_linkcnt(ip); |
| 2178 | vput(tvp); |
| 2179 | return (error); |
| 2180 | } |
| 2181 | |
| 2182 | static int |
| 2183 | ufs_missingop(struct vop_generic_args *ap) |
| 2184 | { |
| 2185 | panic("no vop function for %s in ufs child", ap->a_desc->vdesc_name); |
| 2186 | return (EOPNOTSUPP); |
| 2187 | } |
| 2188 | |
| 2189 | static struct filterops ufsread_filtops = |
| 2190 | { 1, NULL, filt_ufsdetach, filt_ufsread }; |
| 2191 | static struct filterops ufswrite_filtops = |
| 2192 | { 1, NULL, filt_ufsdetach, filt_ufswrite }; |
| 2193 | static struct filterops ufsvnode_filtops = |
| 2194 | { 1, NULL, filt_ufsdetach, filt_ufsvnode }; |
| 2195 | |
| 2196 | /* |
| 2197 | * ufs_kqfilter(struct vnode *a_vp, struct knote *a_kn) |
| 2198 | */ |
| 2199 | static int |
| 2200 | ufs_kqfilter(struct vop_kqfilter_args *ap) |
| 2201 | { |
| 2202 | struct vnode *vp = ap->a_vp; |
| 2203 | struct knote *kn = ap->a_kn; |
| 2204 | lwkt_tokref ilock; |
| 2205 | |
| 2206 | switch (kn->kn_filter) { |
| 2207 | case EVFILT_READ: |
| 2208 | kn->kn_fop = &ufsread_filtops; |
| 2209 | break; |
| 2210 | case EVFILT_WRITE: |
| 2211 | kn->kn_fop = &ufswrite_filtops; |
| 2212 | break; |
| 2213 | case EVFILT_VNODE: |
| 2214 | kn->kn_fop = &ufsvnode_filtops; |
| 2215 | break; |
| 2216 | default: |
| 2217 | return (1); |
| 2218 | } |
| 2219 | |
| 2220 | kn->kn_hook = (caddr_t)vp; |
| 2221 | |
| 2222 | lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token); |
| 2223 | SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext); |
| 2224 | lwkt_reltoken(&ilock); |
| 2225 | |
| 2226 | return (0); |
| 2227 | } |
| 2228 | |
| 2229 | static void |
| 2230 | filt_ufsdetach(struct knote *kn) |
| 2231 | { |
| 2232 | struct vnode *vp = (struct vnode *)kn->kn_hook; |
| 2233 | lwkt_tokref ilock; |
| 2234 | |
| 2235 | lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token); |
| 2236 | SLIST_REMOVE(&vp->v_pollinfo.vpi_selinfo.si_note, |
| 2237 | kn, knote, kn_selnext); |
| 2238 | lwkt_reltoken(&ilock); |
| 2239 | } |
| 2240 | |
| 2241 | /*ARGSUSED*/ |
| 2242 | static int |
| 2243 | filt_ufsread(struct knote *kn, long hint) |
| 2244 | { |
| 2245 | struct vnode *vp = (struct vnode *)kn->kn_hook; |
| 2246 | struct inode *ip = VTOI(vp); |
| 2247 | |
| 2248 | /* |
| 2249 | * filesystem is gone, so set the EOF flag and schedule |
| 2250 | * the knote for deletion. |
| 2251 | */ |
| 2252 | if (hint == NOTE_REVOKE) { |
| 2253 | kn->kn_flags |= (EV_EOF | EV_ONESHOT); |
| 2254 | return (1); |
| 2255 | } |
| 2256 | |
| 2257 | kn->kn_data = ip->i_size - kn->kn_fp->f_offset; |
| 2258 | return (kn->kn_data != 0); |
| 2259 | } |
| 2260 | |
| 2261 | /*ARGSUSED*/ |
| 2262 | static int |
| 2263 | filt_ufswrite(struct knote *kn, long hint) |
| 2264 | { |
| 2265 | /* |
| 2266 | * filesystem is gone, so set the EOF flag and schedule |
| 2267 | * the knote for deletion. |
| 2268 | */ |
| 2269 | if (hint == NOTE_REVOKE) |
| 2270 | kn->kn_flags |= (EV_EOF | EV_ONESHOT); |
| 2271 | |
| 2272 | kn->kn_data = 0; |
| 2273 | return (1); |
| 2274 | } |
| 2275 | |
| 2276 | static int |
| 2277 | filt_ufsvnode(struct knote *kn, long hint) |
| 2278 | { |
| 2279 | if (kn->kn_sfflags & hint) |
| 2280 | kn->kn_fflags |= hint; |
| 2281 | if (hint == NOTE_REVOKE) { |
| 2282 | kn->kn_flags |= EV_EOF; |
| 2283 | return (1); |
| 2284 | } |
| 2285 | return (kn->kn_fflags != 0); |
| 2286 | } |
| 2287 | |
| 2288 | /* Global vfs data structures for ufs. */ |
| 2289 | static struct vop_ops *ufs_vnode_vops; |
| 2290 | static struct vnodeopv_entry_desc ufs_vnodeop_entries[] = { |
| 2291 | { &vop_default_desc, vop_defaultop }, |
| 2292 | { &vop_fsync_desc, (vnodeopv_entry_t) ufs_missingop }, |
| 2293 | { &vop_read_desc, (vnodeopv_entry_t) ufs_missingop }, |
| 2294 | { &vop_reallocblks_desc, (vnodeopv_entry_t) ufs_missingop }, |
| 2295 | { &vop_write_desc, (vnodeopv_entry_t) ufs_missingop }, |
| 2296 | { &vop_access_desc, (vnodeopv_entry_t) ufs_access }, |
| 2297 | { &vop_advlock_desc, (vnodeopv_entry_t) ufs_advlock }, |
| 2298 | { &vop_bmap_desc, (vnodeopv_entry_t) ufs_bmap }, |
| 2299 | { &vop_old_lookup_desc, (vnodeopv_entry_t) ufs_lookup }, |
| 2300 | { &vop_close_desc, (vnodeopv_entry_t) ufs_close }, |
| 2301 | { &vop_old_create_desc, (vnodeopv_entry_t) ufs_create }, |
| 2302 | { &vop_getattr_desc, (vnodeopv_entry_t) ufs_getattr }, |
| 2303 | { &vop_inactive_desc, (vnodeopv_entry_t) ufs_inactive }, |
| 2304 | { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, |
| 2305 | { &vop_old_link_desc, (vnodeopv_entry_t) ufs_link }, |
| 2306 | { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, |
| 2307 | { &vop_old_mkdir_desc, (vnodeopv_entry_t) ufs_mkdir }, |
| 2308 | { &vop_old_mknod_desc, (vnodeopv_entry_t) ufs_mknod }, |
| 2309 | { &vop_mmap_desc, (vnodeopv_entry_t) ufs_mmap }, |
| 2310 | { &vop_open_desc, (vnodeopv_entry_t) ufs_open }, |
| 2311 | { &vop_pathconf_desc, (vnodeopv_entry_t) ufs_pathconf }, |
| 2312 | { &vop_poll_desc, (vnodeopv_entry_t) vop_stdpoll }, |
| 2313 | { &vop_kqfilter_desc, (vnodeopv_entry_t) ufs_kqfilter }, |
| 2314 | { &vop_print_desc, (vnodeopv_entry_t) ufs_print }, |
| 2315 | { &vop_readdir_desc, (vnodeopv_entry_t) ufs_readdir }, |
| 2316 | { &vop_readlink_desc, (vnodeopv_entry_t) ufs_readlink }, |
| 2317 | { &vop_reclaim_desc, (vnodeopv_entry_t) ufs_reclaim }, |
| 2318 | { &vop_old_remove_desc, (vnodeopv_entry_t) ufs_remove }, |
| 2319 | { &vop_old_rename_desc, (vnodeopv_entry_t) ufs_rename }, |
| 2320 | { &vop_old_rmdir_desc, (vnodeopv_entry_t) ufs_rmdir }, |
| 2321 | { &vop_setattr_desc, (vnodeopv_entry_t) ufs_setattr }, |
| 2322 | { &vop_strategy_desc, (vnodeopv_entry_t) ufs_strategy }, |
| 2323 | { &vop_old_symlink_desc, (vnodeopv_entry_t) ufs_symlink }, |
| 2324 | { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, |
| 2325 | { &vop_old_whiteout_desc, (vnodeopv_entry_t) ufs_whiteout }, |
| 2326 | { NULL, NULL } |
| 2327 | }; |
| 2328 | static struct vnodeopv_desc ufs_vnodeop_opv_desc = |
| 2329 | { &ufs_vnode_vops, ufs_vnodeop_entries, VVF_SUPPORTS_FSMID }; |
| 2330 | |
| 2331 | static struct vop_ops *ufs_spec_vops; |
| 2332 | static struct vnodeopv_entry_desc ufs_specop_entries[] = { |
| 2333 | { &vop_default_desc, (vnodeopv_entry_t) spec_vnoperate }, |
| 2334 | { &vop_fsync_desc, (vnodeopv_entry_t) ufs_missingop }, |
| 2335 | { &vop_access_desc, (vnodeopv_entry_t) ufs_access }, |
| 2336 | { &vop_close_desc, (vnodeopv_entry_t) ufsspec_close }, |
| 2337 | { &vop_getattr_desc, (vnodeopv_entry_t) ufs_getattr }, |
| 2338 | { &vop_inactive_desc, (vnodeopv_entry_t) ufs_inactive }, |
| 2339 | { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, |
| 2340 | { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, |
| 2341 | { &vop_print_desc, (vnodeopv_entry_t) ufs_print }, |
| 2342 | { &vop_read_desc, (vnodeopv_entry_t) ufsspec_read }, |
| 2343 | { &vop_reclaim_desc, (vnodeopv_entry_t) ufs_reclaim }, |
| 2344 | { &vop_setattr_desc, (vnodeopv_entry_t) ufs_setattr }, |
| 2345 | { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, |
| 2346 | { &vop_write_desc, (vnodeopv_entry_t) ufsspec_write }, |
| 2347 | { NULL, NULL } |
| 2348 | }; |
| 2349 | static struct vnodeopv_desc ufs_specop_opv_desc = |
| 2350 | { &ufs_spec_vops, ufs_specop_entries, VVF_SUPPORTS_FSMID }; |
| 2351 | |
| 2352 | static struct vop_ops *ufs_fifo_vops; |
| 2353 | static struct vnodeopv_entry_desc ufs_fifoop_entries[] = { |
| 2354 | { &vop_default_desc, (vnodeopv_entry_t) fifo_vnoperate }, |
| 2355 | { &vop_fsync_desc, (vnodeopv_entry_t) ufs_missingop }, |
| 2356 | { &vop_access_desc, (vnodeopv_entry_t) ufs_access }, |
| 2357 | { &vop_close_desc, (vnodeopv_entry_t) ufsfifo_close }, |
| 2358 | { &vop_getattr_desc, (vnodeopv_entry_t) ufs_getattr }, |
| 2359 | { &vop_inactive_desc, (vnodeopv_entry_t) ufs_inactive }, |
| 2360 | { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, |
| 2361 | { &vop_kqfilter_desc, (vnodeopv_entry_t) ufsfifo_kqfilter }, |
| 2362 | { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, |
| 2363 | { &vop_print_desc, (vnodeopv_entry_t) ufs_print }, |
| 2364 | { &vop_read_desc, (vnodeopv_entry_t) ufsfifo_read }, |
| 2365 | { &vop_reclaim_desc, (vnodeopv_entry_t) ufs_reclaim }, |
| 2366 | { &vop_setattr_desc, (vnodeopv_entry_t) ufs_setattr }, |
| 2367 | { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, |
| 2368 | { &vop_write_desc, (vnodeopv_entry_t) ufsfifo_write }, |
| 2369 | { NULL, NULL } |
| 2370 | }; |
| 2371 | static struct vnodeopv_desc ufs_fifoop_opv_desc = |
| 2372 | { &ufs_fifo_vops, ufs_fifoop_entries, VVF_SUPPORTS_FSMID }; |
| 2373 | |
| 2374 | VNODEOP_SET(ufs_vnodeop_opv_desc); |
| 2375 | VNODEOP_SET(ufs_specop_opv_desc); |
| 2376 | VNODEOP_SET(ufs_fifoop_opv_desc); |
| 2377 | |
| 2378 | /* |
| 2379 | * ufs_vnoperate(struct vnodeop_desc *a_desc) |
| 2380 | */ |
| 2381 | int |
| 2382 | ufs_vnoperate(struct vop_generic_args *ap) |
| 2383 | { |
| 2384 | return (VOCALL(ufs_vnode_vops, ap)); |
| 2385 | } |
| 2386 | |
| 2387 | /* |
| 2388 | * ufs_vnoperatefifo(struct vnodeop_desc *a_desc) |
| 2389 | */ |
| 2390 | int |
| 2391 | ufs_vnoperatefifo(struct vop_generic_args *ap) |
| 2392 | { |
| 2393 | return (VOCALL(ufs_fifo_vops, ap)); |
| 2394 | } |
| 2395 | |
| 2396 | /* |
| 2397 | * ufs_vnoperatespec(struct vnodeop_desc *a_desc) |
| 2398 | */ |
| 2399 | int |
| 2400 | ufs_vnoperatespec(struct vop_generic_args *ap) |
| 2401 | { |
| 2402 | return (VOCALL(ufs_spec_vops, ap)); |
| 2403 | } |