| 1 | /* $NetBSD: ntfs_vnops.c,v 1.60 2016/08/20 12:37:07 hannken Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1992, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * John Heidemann of the UCLA Ficus project. |
| 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. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * Id: ntfs_vnops.c,v 1.5 1999/05/12 09:43:06 semenu Exp |
| 35 | * |
| 36 | */ |
| 37 | |
| 38 | #include <sys/cdefs.h> |
| 39 | __KERNEL_RCSID(0, "$NetBSD: ntfs_vnops.c,v 1.60 2016/08/20 12:37:07 hannken Exp $" ); |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/kernel.h> |
| 44 | #include <sys/time.h> |
| 45 | #include <sys/stat.h> |
| 46 | #include <sys/vnode.h> |
| 47 | #include <sys/mount.h> |
| 48 | #include <sys/namei.h> |
| 49 | #include <sys/malloc.h> |
| 50 | #include <sys/buf.h> |
| 51 | #include <sys/dirent.h> |
| 52 | #include <sys/kauth.h> |
| 53 | #include <sys/sysctl.h> |
| 54 | |
| 55 | |
| 56 | #include <fs/ntfs/ntfs.h> |
| 57 | #include <fs/ntfs/ntfs_inode.h> |
| 58 | #include <fs/ntfs/ntfs_subr.h> |
| 59 | #include <fs/ntfs/ntfs_vfsops.h> |
| 60 | #include <miscfs/specfs/specdev.h> |
| 61 | #include <miscfs/genfs/genfs.h> |
| 62 | |
| 63 | #include <sys/unistd.h> /* for pathconf(2) constants */ |
| 64 | |
| 65 | static int ntfs_bypass(void *); |
| 66 | static int ntfs_read(void *); |
| 67 | static int ntfs_write(void *); |
| 68 | static int ntfs_getattr(void *); |
| 69 | static int ntfs_inactive(void *); |
| 70 | static int ntfs_print(void *); |
| 71 | static int ntfs_reclaim(void *); |
| 72 | static int ntfs_strategy(void *); |
| 73 | static int ntfs_access(void *); |
| 74 | static int ntfs_open(void *); |
| 75 | static int ntfs_close(void *); |
| 76 | static int ntfs_readdir(void *); |
| 77 | static int ntfs_lookup(void *); |
| 78 | static int ntfs_bmap(void *); |
| 79 | static int ntfs_fsync(void *); |
| 80 | static int ntfs_pathconf(void *); |
| 81 | |
| 82 | extern int prtactive; |
| 83 | |
| 84 | /* |
| 85 | * This is a noop, simply returning what one has been given. |
| 86 | */ |
| 87 | int |
| 88 | ntfs_bmap(void *v) |
| 89 | { |
| 90 | struct vop_bmap_args /* { |
| 91 | struct vnode *a_vp; |
| 92 | daddr_t a_bn; |
| 93 | struct vnode **a_vpp; |
| 94 | daddr_t *a_bnp; |
| 95 | int *a_runp; |
| 96 | int *a_runb; |
| 97 | } */ *ap = v; |
| 98 | dprintf(("ntfs_bmap: vn: %p, blk: %d\n" , ap->a_vp,(u_int32_t)ap->a_bn)); |
| 99 | if (ap->a_vpp != NULL) |
| 100 | *ap->a_vpp = ap->a_vp; |
| 101 | if (ap->a_bnp != NULL) |
| 102 | *ap->a_bnp = ap->a_bn; |
| 103 | if (ap->a_runp != NULL) |
| 104 | *ap->a_runp = 0; |
| 105 | return (0); |
| 106 | } |
| 107 | |
| 108 | static int |
| 109 | ntfs_read(void *v) |
| 110 | { |
| 111 | struct vop_read_args /* { |
| 112 | struct vnode *a_vp; |
| 113 | struct uio *a_uio; |
| 114 | int a_ioflag; |
| 115 | kauth_cred_t a_cred; |
| 116 | } */ *ap = v; |
| 117 | struct vnode *vp = ap->a_vp; |
| 118 | struct fnode *fp = VTOF(vp); |
| 119 | struct ntnode *ip = FTONT(fp); |
| 120 | struct uio *uio = ap->a_uio; |
| 121 | struct ntfsmount *ntmp = ip->i_mp; |
| 122 | u_int64_t toread; |
| 123 | int error; |
| 124 | |
| 125 | dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n" , |
| 126 | (unsigned long long)ip->i_number, (long long)uio->uio_offset, |
| 127 | (long long)uio->uio_resid)); |
| 128 | |
| 129 | dprintf(("ntfs_read: filesize: %qu" ,(long long)fp->f_size)); |
| 130 | |
| 131 | /* don't allow reading after end of file */ |
| 132 | if (uio->uio_offset > fp->f_size) |
| 133 | toread = 0; |
| 134 | else |
| 135 | toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset ); |
| 136 | |
| 137 | dprintf((", toread: %qu\n" ,(long long)toread)); |
| 138 | |
| 139 | if (toread == 0) |
| 140 | return (0); |
| 141 | |
| 142 | error = ntfs_readattr(ntmp, ip, fp->f_attrtype, |
| 143 | fp->f_attrname, uio->uio_offset, toread, NULL, uio); |
| 144 | if (error) { |
| 145 | printf("ntfs_read: ntfs_readattr failed: %d\n" ,error); |
| 146 | return (error); |
| 147 | } |
| 148 | |
| 149 | return (0); |
| 150 | } |
| 151 | |
| 152 | static int |
| 153 | ntfs_bypass(void *v) |
| 154 | { |
| 155 | struct vop_generic_args /* { |
| 156 | struct vnodeop_desc *a_desc; |
| 157 | <other random data follows, presumably> |
| 158 | } */ *ap __unused = v; |
| 159 | int error = ENOTTY; |
| 160 | dprintf(("ntfs_bypass: %s\n" , ap->a_desc->vdesc_name)); |
| 161 | return (error); |
| 162 | } |
| 163 | |
| 164 | |
| 165 | static int |
| 166 | ntfs_getattr(void *v) |
| 167 | { |
| 168 | struct vop_getattr_args /* { |
| 169 | struct vnode *a_vp; |
| 170 | struct vattr *a_vap; |
| 171 | kauth_cred_t a_cred; |
| 172 | } */ *ap = v; |
| 173 | struct vnode *vp = ap->a_vp; |
| 174 | struct fnode *fp = VTOF(vp); |
| 175 | struct ntnode *ip = FTONT(fp); |
| 176 | struct vattr *vap = ap->a_vap; |
| 177 | |
| 178 | dprintf(("ntfs_getattr: %llu, flags: %d\n" , |
| 179 | (unsigned long long)ip->i_number, ip->i_flag)); |
| 180 | |
| 181 | vap->va_fsid = ip->i_dev; |
| 182 | vap->va_fileid = ip->i_number; |
| 183 | vap->va_mode = ip->i_mp->ntm_mode; |
| 184 | vap->va_nlink = ip->i_nlink; |
| 185 | vap->va_uid = ip->i_mp->ntm_uid; |
| 186 | vap->va_gid = ip->i_mp->ntm_gid; |
| 187 | vap->va_rdev = 0; /* XXX UNODEV ? */ |
| 188 | vap->va_size = fp->f_size; |
| 189 | vap->va_bytes = fp->f_allocated; |
| 190 | vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); |
| 191 | vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); |
| 192 | vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); |
| 193 | vap->va_flags = ip->i_flag; |
| 194 | vap->va_gen = 0; |
| 195 | vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; |
| 196 | vap->va_type = vp->v_type; |
| 197 | vap->va_filerev = 0; |
| 198 | return (0); |
| 199 | } |
| 200 | |
| 201 | |
| 202 | /* |
| 203 | * Last reference to an ntnode. If necessary, write or delete it. |
| 204 | */ |
| 205 | int |
| 206 | ntfs_inactive(void *v) |
| 207 | { |
| 208 | struct vop_inactive_args /* { |
| 209 | struct vnode *a_vp; |
| 210 | } */ *ap = v; |
| 211 | struct vnode *vp = ap->a_vp; |
| 212 | #ifdef NTFS_DEBUG |
| 213 | struct ntnode *ip = VTONT(vp); |
| 214 | #endif |
| 215 | |
| 216 | dprintf(("ntfs_inactive: vnode: %p, ntnode: %llu\n" , vp, |
| 217 | (unsigned long long)ip->i_number)); |
| 218 | |
| 219 | VOP_UNLOCK(vp); |
| 220 | |
| 221 | /* XXX since we don't support any filesystem changes |
| 222 | * right now, nothing more needs to be done |
| 223 | */ |
| 224 | return (0); |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * Reclaim an fnode/ntnode so that it can be used for other purposes. |
| 229 | */ |
| 230 | int |
| 231 | ntfs_reclaim(void *v) |
| 232 | { |
| 233 | struct vop_reclaim_args /* { |
| 234 | struct vnode *a_vp; |
| 235 | } */ *ap = v; |
| 236 | struct vnode *vp = ap->a_vp; |
| 237 | struct fnode *fp = VTOF(vp); |
| 238 | struct ntnode *ip = FTONT(fp); |
| 239 | const int attrlen = strlen(fp->f_attrname); |
| 240 | int error; |
| 241 | |
| 242 | dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n" , vp, |
| 243 | (unsigned long long)ip->i_number)); |
| 244 | |
| 245 | if (prtactive && vp->v_usecount > 1) |
| 246 | vprint("ntfs_reclaim: pushing active" , vp); |
| 247 | |
| 248 | if ((error = ntfs_ntget(ip)) != 0) |
| 249 | return (error); |
| 250 | |
| 251 | if (ip->i_devvp) { |
| 252 | vrele(ip->i_devvp); |
| 253 | ip->i_devvp = NULL; |
| 254 | } |
| 255 | genfs_node_destroy(vp); |
| 256 | vp->v_data = NULL; |
| 257 | |
| 258 | /* Destroy fnode. */ |
| 259 | if (fp->f_key != &fp->f_smallkey) |
| 260 | kmem_free(fp->f_key, NTKEY_SIZE(attrlen)); |
| 261 | if (fp->f_dirblbuf) |
| 262 | free(fp->f_dirblbuf, M_NTFSDIR); |
| 263 | kmem_free(fp, sizeof(*fp)); |
| 264 | ntfs_ntrele(ip); |
| 265 | |
| 266 | ntfs_ntput(ip); |
| 267 | |
| 268 | return (0); |
| 269 | } |
| 270 | |
| 271 | static int |
| 272 | ntfs_print(void *v) |
| 273 | { |
| 274 | struct vop_print_args /* { |
| 275 | struct vnode *a_vp; |
| 276 | } */ *ap = v; |
| 277 | struct ntnode *ip = VTONT(ap->a_vp); |
| 278 | |
| 279 | printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n" , |
| 280 | (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, |
| 281 | ip->i_nlink); |
| 282 | printf(" " ); |
| 283 | printf("\n" ); |
| 284 | return (0); |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Calculate the logical to physical mapping if not done already, |
| 289 | * then call the device strategy routine. |
| 290 | */ |
| 291 | int |
| 292 | ntfs_strategy(void *v) |
| 293 | { |
| 294 | struct vop_strategy_args /* { |
| 295 | struct vnode *a_vp; |
| 296 | struct buf *a_bp; |
| 297 | } */ *ap = v; |
| 298 | struct buf *bp = ap->a_bp; |
| 299 | struct vnode *vp = ap->a_vp; |
| 300 | struct fnode *fp = VTOF(vp); |
| 301 | struct ntnode *ip = FTONT(fp); |
| 302 | struct ntfsmount *ntmp = ip->i_mp; |
| 303 | int error; |
| 304 | |
| 305 | dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n" , |
| 306 | (u_int32_t)bp->b_blkno, |
| 307 | (u_int32_t)bp->b_lblkno)); |
| 308 | |
| 309 | dprintf(("strategy: bcount: %u flags: 0x%x\n" , |
| 310 | (u_int32_t)bp->b_bcount,bp->b_flags)); |
| 311 | |
| 312 | if (bp->b_flags & B_READ) { |
| 313 | u_int32_t toread; |
| 314 | |
| 315 | if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { |
| 316 | clrbuf(bp); |
| 317 | error = 0; |
| 318 | } else { |
| 319 | toread = MIN(bp->b_bcount, |
| 320 | fp->f_size - ntfs_cntob(bp->b_blkno)); |
| 321 | dprintf(("ntfs_strategy: toread: %d, fsize: %d\n" , |
| 322 | toread,(u_int32_t)fp->f_size)); |
| 323 | |
| 324 | error = ntfs_readattr(ntmp, ip, fp->f_attrtype, |
| 325 | fp->f_attrname, ntfs_cntob(bp->b_blkno), |
| 326 | toread, bp->b_data, NULL); |
| 327 | |
| 328 | if (error) { |
| 329 | printf("ntfs_strategy: ntfs_readattr failed\n" ); |
| 330 | bp->b_error = error; |
| 331 | } |
| 332 | |
| 333 | memset((char *)bp->b_data + toread, 0, |
| 334 | bp->b_bcount - toread); |
| 335 | } |
| 336 | } else { |
| 337 | size_t tmp; |
| 338 | u_int32_t towrite; |
| 339 | |
| 340 | if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { |
| 341 | printf("ntfs_strategy: CAN'T EXTEND FILE\n" ); |
| 342 | bp->b_error = error = EFBIG; |
| 343 | } else { |
| 344 | towrite = MIN(bp->b_bcount, |
| 345 | fp->f_size - ntfs_cntob(bp->b_blkno)); |
| 346 | dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n" , |
| 347 | towrite,(u_int32_t)fp->f_size)); |
| 348 | |
| 349 | error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, |
| 350 | fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, |
| 351 | bp->b_data, &tmp, NULL); |
| 352 | |
| 353 | if (error) { |
| 354 | printf("ntfs_strategy: ntfs_writeattr fail\n" ); |
| 355 | bp->b_error = error; |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | biodone(bp); |
| 360 | return (error); |
| 361 | } |
| 362 | |
| 363 | static int |
| 364 | ntfs_write(void *v) |
| 365 | { |
| 366 | struct vop_write_args /* { |
| 367 | struct vnode *a_vp; |
| 368 | struct uio *a_uio; |
| 369 | int a_ioflag; |
| 370 | kauth_cred_t a_cred; |
| 371 | } */ *ap = v; |
| 372 | struct vnode *vp = ap->a_vp; |
| 373 | struct fnode *fp = VTOF(vp); |
| 374 | struct ntnode *ip = FTONT(fp); |
| 375 | struct uio *uio = ap->a_uio; |
| 376 | struct ntfsmount *ntmp = ip->i_mp; |
| 377 | u_int64_t towrite; |
| 378 | size_t written; |
| 379 | int error; |
| 380 | |
| 381 | dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n" , |
| 382 | (unsigned long long)ip->i_number, (long long)uio->uio_offset, |
| 383 | (long long)uio->uio_resid)); |
| 384 | dprintf(("ntfs_write: filesize: %qu" ,(long long)fp->f_size)); |
| 385 | |
| 386 | if (uio->uio_resid + uio->uio_offset > fp->f_size) { |
| 387 | printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n" ); |
| 388 | return (EFBIG); |
| 389 | } |
| 390 | |
| 391 | towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); |
| 392 | |
| 393 | dprintf((", towrite: %qu\n" ,(long long)towrite)); |
| 394 | |
| 395 | error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, |
| 396 | fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); |
| 397 | #ifdef NTFS_DEBUG |
| 398 | if (error) |
| 399 | printf("ntfs_write: ntfs_writeattr failed: %d\n" , error); |
| 400 | #endif |
| 401 | |
| 402 | return (error); |
| 403 | } |
| 404 | |
| 405 | static int |
| 406 | ntfs_check_possible(struct vnode *vp, struct ntnode *ip, mode_t mode) |
| 407 | { |
| 408 | |
| 409 | /* |
| 410 | * Disallow write attempts on read-only file systems; |
| 411 | * unless the file is a socket, fifo, or a block or |
| 412 | * character device resident on the file system. |
| 413 | */ |
| 414 | if (mode & VWRITE) { |
| 415 | switch ((int)vp->v_type) { |
| 416 | case VDIR: |
| 417 | case VLNK: |
| 418 | case VREG: |
| 419 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 420 | return (EROFS); |
| 421 | break; |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | return 0; |
| 426 | } |
| 427 | |
| 428 | static int |
| 429 | ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, mode_t mode, |
| 430 | kauth_cred_t cred) |
| 431 | { |
| 432 | mode_t file_mode; |
| 433 | |
| 434 | file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH); |
| 435 | |
| 436 | return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, |
| 437 | file_mode), vp, NULL, genfs_can_access(vp->v_type, file_mode, |
| 438 | ip->i_mp->ntm_uid, ip->i_mp->ntm_gid, mode, cred)); |
| 439 | } |
| 440 | |
| 441 | int |
| 442 | ntfs_access(void *v) |
| 443 | { |
| 444 | struct vop_access_args /* { |
| 445 | struct vnode *a_vp; |
| 446 | int a_mode; |
| 447 | kauth_cred_t a_cred; |
| 448 | } */ *ap = v; |
| 449 | struct vnode *vp = ap->a_vp; |
| 450 | struct ntnode *ip = VTONT(vp); |
| 451 | int error; |
| 452 | |
| 453 | dprintf(("ntfs_access: %llu\n" , (unsigned long long)ip->i_number)); |
| 454 | |
| 455 | error = ntfs_check_possible(vp, ip, ap->a_mode); |
| 456 | if (error) |
| 457 | return error; |
| 458 | |
| 459 | error = ntfs_check_permitted(vp, ip, ap->a_mode, ap->a_cred); |
| 460 | |
| 461 | return error; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Open called. |
| 466 | * |
| 467 | * Nothing to do. |
| 468 | */ |
| 469 | /* ARGSUSED */ |
| 470 | static int |
| 471 | ntfs_open(void *v) |
| 472 | { |
| 473 | struct vop_open_args /* { |
| 474 | struct vnode *a_vp; |
| 475 | int a_mode; |
| 476 | kauth_cred_t a_cred; |
| 477 | } */ *ap __unused = v; |
| 478 | #ifdef NTFS_DEBUG |
| 479 | struct vnode *vp = ap->a_vp; |
| 480 | struct ntnode *ip = VTONT(vp); |
| 481 | |
| 482 | dprintf(("ntfs_open: %llu\n" , (unsigned long long)ip->i_number)); |
| 483 | #endif |
| 484 | |
| 485 | /* |
| 486 | * Files marked append-only must be opened for appending. |
| 487 | */ |
| 488 | |
| 489 | return (0); |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * Close called. |
| 494 | * |
| 495 | * Update the times on the inode. |
| 496 | */ |
| 497 | /* ARGSUSED */ |
| 498 | static int |
| 499 | ntfs_close(void *v) |
| 500 | { |
| 501 | struct vop_close_args /* { |
| 502 | struct vnode *a_vp; |
| 503 | int a_fflag; |
| 504 | kauth_cred_t a_cred; |
| 505 | } */ *ap __unused = v; |
| 506 | #ifdef NTFS_DEBUG |
| 507 | struct vnode *vp = ap->a_vp; |
| 508 | struct ntnode *ip = VTONT(vp); |
| 509 | |
| 510 | dprintf(("ntfs_close: %llu\n" , (unsigned long long)ip->i_number)); |
| 511 | #endif |
| 512 | |
| 513 | return (0); |
| 514 | } |
| 515 | |
| 516 | int |
| 517 | ntfs_readdir(void *v) |
| 518 | { |
| 519 | struct vop_readdir_args /* { |
| 520 | struct vnode *a_vp; |
| 521 | struct uio *a_uio; |
| 522 | kauth_cred_t a_cred; |
| 523 | int *a_ncookies; |
| 524 | u_int **cookies; |
| 525 | } */ *ap = v; |
| 526 | struct vnode *vp = ap->a_vp; |
| 527 | struct fnode *fp = VTOF(vp); |
| 528 | struct ntnode *ip = FTONT(fp); |
| 529 | struct uio *uio = ap->a_uio; |
| 530 | struct ntfsmount *ntmp = ip->i_mp; |
| 531 | int i, error = 0; |
| 532 | u_int32_t faked = 0, num; |
| 533 | int ncookies = 0; |
| 534 | struct dirent *cde; |
| 535 | off_t off; |
| 536 | |
| 537 | dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n" , |
| 538 | (unsigned long long)ip->i_number, (long long)uio->uio_offset, |
| 539 | (long long)uio->uio_resid)); |
| 540 | |
| 541 | off = uio->uio_offset; |
| 542 | |
| 543 | cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); |
| 544 | |
| 545 | /* Simulate . in every dir except ROOT */ |
| 546 | if (ip->i_number != NTFS_ROOTINO |
| 547 | && uio->uio_offset < sizeof(struct dirent)) { |
| 548 | cde->d_fileno = ip->i_number; |
| 549 | cde->d_reclen = sizeof(struct dirent); |
| 550 | cde->d_type = DT_DIR; |
| 551 | cde->d_namlen = 1; |
| 552 | strncpy(cde->d_name, "." , 2); |
| 553 | error = uiomove((void *)cde, sizeof(struct dirent), uio); |
| 554 | if (error) |
| 555 | goto out; |
| 556 | |
| 557 | ncookies++; |
| 558 | } |
| 559 | |
| 560 | /* Simulate .. in every dir including ROOT */ |
| 561 | if (uio->uio_offset < 2 * sizeof(struct dirent)) { |
| 562 | cde->d_fileno = NTFS_ROOTINO; /* XXX */ |
| 563 | cde->d_reclen = sizeof(struct dirent); |
| 564 | cde->d_type = DT_DIR; |
| 565 | cde->d_namlen = 2; |
| 566 | strncpy(cde->d_name, ".." , 3); |
| 567 | |
| 568 | error = uiomove((void *) cde, sizeof(struct dirent), uio); |
| 569 | if (error) |
| 570 | goto out; |
| 571 | |
| 572 | ncookies++; |
| 573 | } |
| 574 | |
| 575 | faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; |
| 576 | num = uio->uio_offset / sizeof(struct dirent) - faked; |
| 577 | |
| 578 | while (uio->uio_resid >= sizeof(struct dirent)) { |
| 579 | struct attr_indexentry *iep; |
| 580 | char *fname; |
| 581 | size_t remains; |
| 582 | int sz; |
| 583 | |
| 584 | error = ntfs_ntreaddir(ntmp, fp, num, &iep); |
| 585 | if (error) |
| 586 | goto out; |
| 587 | |
| 588 | if (NULL == iep) |
| 589 | break; |
| 590 | |
| 591 | for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); |
| 592 | iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) |
| 593 | { |
| 594 | if(!ntfs_isnamepermitted(ntmp,iep)) |
| 595 | continue; |
| 596 | |
| 597 | remains = sizeof(cde->d_name) - 1; |
| 598 | fname = cde->d_name; |
| 599 | for(i=0; i<iep->ie_fnamelen; i++) { |
| 600 | sz = (*ntmp->ntm_wput)(fname, remains, |
| 601 | iep->ie_fname[i]); |
| 602 | fname += sz; |
| 603 | remains -= sz; |
| 604 | } |
| 605 | *fname = '\0'; |
| 606 | dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, " , |
| 607 | num, cde->d_name, iep->ie_fnametype, |
| 608 | iep->ie_flag)); |
| 609 | cde->d_namlen = fname - (char *) cde->d_name; |
| 610 | cde->d_fileno = iep->ie_number; |
| 611 | cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; |
| 612 | cde->d_reclen = sizeof(struct dirent); |
| 613 | dprintf(("%s\n" , (cde->d_type == DT_DIR) ? "dir" :"reg" )); |
| 614 | |
| 615 | error = uiomove((void *)cde, sizeof(struct dirent), uio); |
| 616 | if (error) |
| 617 | goto out; |
| 618 | |
| 619 | ncookies++; |
| 620 | num++; |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | dprintf(("ntfs_readdir: %d entries (%d bytes) read\n" , |
| 625 | ncookies,(u_int)(uio->uio_offset - off))); |
| 626 | dprintf(("ntfs_readdir: off: %qd resid: %qu\n" , |
| 627 | (long long)uio->uio_offset,(long long)uio->uio_resid)); |
| 628 | |
| 629 | if (!error && ap->a_ncookies != NULL) { |
| 630 | struct dirent* dpStart; |
| 631 | struct dirent* dp; |
| 632 | off_t *cookies; |
| 633 | off_t *cookiep; |
| 634 | |
| 635 | dprintf(("ntfs_readdir: %d cookies\n" ,ncookies)); |
| 636 | dpStart = (struct dirent *) |
| 637 | ((char *)uio->uio_iov->iov_base - |
| 638 | (uio->uio_offset - off)); |
| 639 | cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); |
| 640 | for (dp = dpStart, cookiep = cookies, i=0; |
| 641 | i < ncookies; |
| 642 | dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { |
| 643 | off += dp->d_reclen; |
| 644 | *cookiep++ = (u_int) off; |
| 645 | } |
| 646 | *ap->a_ncookies = ncookies; |
| 647 | *ap->a_cookies = cookies; |
| 648 | } |
| 649 | /* |
| 650 | if (ap->a_eofflag) |
| 651 | *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; |
| 652 | */ |
| 653 | out: |
| 654 | free(cde, M_TEMP); |
| 655 | return (error); |
| 656 | } |
| 657 | |
| 658 | int |
| 659 | ntfs_lookup(void *v) |
| 660 | { |
| 661 | struct vop_lookup_v2_args /* { |
| 662 | struct vnode *a_dvp; |
| 663 | struct vnode **a_vpp; |
| 664 | struct componentname *a_cnp; |
| 665 | } */ *ap = v; |
| 666 | struct vnode *dvp = ap->a_dvp; |
| 667 | struct ntnode *dip = VTONT(dvp); |
| 668 | struct ntfsmount *ntmp = dip->i_mp; |
| 669 | struct componentname *cnp = ap->a_cnp; |
| 670 | kauth_cred_t cred = cnp->cn_cred; |
| 671 | int error; |
| 672 | |
| 673 | dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n" , |
| 674 | (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, |
| 675 | (unsigned long long)dip->i_number)); |
| 676 | |
| 677 | error = VOP_ACCESS(dvp, VEXEC, cred); |
| 678 | if(error) |
| 679 | return (error); |
| 680 | |
| 681 | if ((cnp->cn_flags & ISLASTCN) && |
| 682 | (dvp->v_mount->mnt_flag & MNT_RDONLY) && |
| 683 | (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) |
| 684 | return (EROFS); |
| 685 | |
| 686 | /* |
| 687 | * We now have a segment name to search for, and a directory |
| 688 | * to search. |
| 689 | * |
| 690 | * Before tediously performing a linear scan of the directory, |
| 691 | * check the name cache to see if the directory/name pair |
| 692 | * we are looking for is known already. |
| 693 | */ |
| 694 | if (cache_lookup(ap->a_dvp, cnp->cn_nameptr, cnp->cn_namelen, |
| 695 | cnp->cn_nameiop, cnp->cn_flags, NULL, ap->a_vpp)) { |
| 696 | return *ap->a_vpp == NULLVP ? ENOENT : 0; |
| 697 | } |
| 698 | |
| 699 | if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { |
| 700 | dprintf(("ntfs_lookup: faking . directory in %llu\n" , |
| 701 | (unsigned long long)dip->i_number)); |
| 702 | |
| 703 | vref(dvp); |
| 704 | *ap->a_vpp = dvp; |
| 705 | error = 0; |
| 706 | } else if (cnp->cn_flags & ISDOTDOT) { |
| 707 | struct ntvattr *vap; |
| 708 | |
| 709 | dprintf(("ntfs_lookup: faking .. directory in %llu\n" , |
| 710 | (unsigned long long)dip->i_number)); |
| 711 | |
| 712 | error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); |
| 713 | if (error) { |
| 714 | return (error); |
| 715 | } |
| 716 | |
| 717 | dprintf(("ntfs_lookup: parentdir: %d\n" , |
| 718 | vap->va_a_name->n_pnumber)); |
| 719 | error = ntfs_vgetex(ntmp->ntm_mountp, |
| 720 | vap->va_a_name->n_pnumber, |
| 721 | NTFS_A_DATA, "" , 0, ap->a_vpp); |
| 722 | ntfs_ntvattrrele(vap); |
| 723 | if (error) { |
| 724 | return (error); |
| 725 | } |
| 726 | } else { |
| 727 | error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); |
| 728 | if (error) { |
| 729 | dprintf(("ntfs_ntlookupfile: returned %d\n" , error)); |
| 730 | return (error); |
| 731 | } |
| 732 | |
| 733 | dprintf(("ntfs_lookup: found ino: %llu\n" , |
| 734 | (unsigned long long)VTONT(*ap->a_vpp)->i_number)); |
| 735 | } |
| 736 | |
| 737 | cache_enter(dvp, *ap->a_vpp, cnp->cn_nameptr, cnp->cn_namelen, |
| 738 | cnp->cn_flags); |
| 739 | |
| 740 | return error; |
| 741 | } |
| 742 | |
| 743 | /* |
| 744 | * Flush the blocks of a file to disk. |
| 745 | * |
| 746 | * This function is worthless for vnodes that represent directories. Maybe we |
| 747 | * could just do a sync if they try an fsync on a directory file. |
| 748 | */ |
| 749 | static int |
| 750 | ntfs_fsync(void *v) |
| 751 | { |
| 752 | struct vop_fsync_args /* { |
| 753 | struct vnode *a_vp; |
| 754 | kauth_cred_t a_cred; |
| 755 | int a_flags; |
| 756 | off_t offlo; |
| 757 | off_t offhi; |
| 758 | } */ *ap = v; |
| 759 | struct vnode *vp = ap->a_vp; |
| 760 | |
| 761 | if (ap->a_flags & FSYNC_CACHE) { |
| 762 | return EOPNOTSUPP; |
| 763 | } |
| 764 | |
| 765 | return vflushbuf(vp, ap->a_flags); |
| 766 | } |
| 767 | |
| 768 | /* |
| 769 | * Return POSIX pathconf information applicable to NTFS filesystem |
| 770 | */ |
| 771 | static int |
| 772 | ntfs_pathconf(void *v) |
| 773 | { |
| 774 | struct vop_pathconf_args /* { |
| 775 | struct vnode *a_vp; |
| 776 | int a_name; |
| 777 | register_t *a_retval; |
| 778 | } */ *ap = v; |
| 779 | |
| 780 | switch (ap->a_name) { |
| 781 | case _PC_LINK_MAX: |
| 782 | *ap->a_retval = 1; |
| 783 | return (0); |
| 784 | case _PC_NAME_MAX: |
| 785 | *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; |
| 786 | return (0); |
| 787 | case _PC_PATH_MAX: |
| 788 | *ap->a_retval = PATH_MAX; |
| 789 | return (0); |
| 790 | case _PC_CHOWN_RESTRICTED: |
| 791 | *ap->a_retval = 1; |
| 792 | return (0); |
| 793 | case _PC_NO_TRUNC: |
| 794 | *ap->a_retval = 0; |
| 795 | return (0); |
| 796 | case _PC_SYNC_IO: |
| 797 | *ap->a_retval = 1; |
| 798 | return (0); |
| 799 | case _PC_FILESIZEBITS: |
| 800 | *ap->a_retval = 64; |
| 801 | return (0); |
| 802 | default: |
| 803 | return (EINVAL); |
| 804 | } |
| 805 | /* NOTREACHED */ |
| 806 | } |
| 807 | |
| 808 | /* |
| 809 | * Global vfs data structures |
| 810 | */ |
| 811 | vop_t **ntfs_vnodeop_p; |
| 812 | |
| 813 | const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { |
| 814 | { &vop_default_desc, (vop_t *) ntfs_bypass }, |
| 815 | { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ |
| 816 | { &vop_create_desc, genfs_eopnotsupp }, /* create */ |
| 817 | { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ |
| 818 | { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ |
| 819 | { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ |
| 820 | { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ |
| 821 | { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ |
| 822 | { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ |
| 823 | { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ |
| 824 | { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ |
| 825 | { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ |
| 826 | { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ |
| 827 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 828 | { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ |
| 829 | { &vop_poll_desc, genfs_poll }, /* poll */ |
| 830 | { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ |
| 831 | { &vop_revoke_desc, genfs_revoke }, /* revoke */ |
| 832 | { &vop_mmap_desc, genfs_mmap }, /* mmap */ |
| 833 | { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ |
| 834 | { &vop_seek_desc, genfs_seek }, /* seek */ |
| 835 | { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ |
| 836 | { &vop_link_desc, genfs_eopnotsupp }, /* link */ |
| 837 | { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ |
| 838 | { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ |
| 839 | { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ |
| 840 | { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ |
| 841 | { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ |
| 842 | { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ |
| 843 | { &vop_abortop_desc, genfs_abortop }, /* abortop */ |
| 844 | { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ |
| 845 | { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ |
| 846 | { &vop_lock_desc, genfs_lock }, /* lock */ |
| 847 | { &vop_unlock_desc, genfs_unlock }, /* unlock */ |
| 848 | { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ |
| 849 | { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ |
| 850 | { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ |
| 851 | { &vop_islocked_desc, genfs_islocked }, /* islocked */ |
| 852 | { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ |
| 853 | { &vop_advlock_desc, genfs_nullop }, /* advlock */ |
| 854 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
| 855 | { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ |
| 856 | { &vop_putpages_desc, genfs_putpages }, /* putpages */ |
| 857 | { NULL, NULL } |
| 858 | }; |
| 859 | const struct vnodeopv_desc ntfs_vnodeop_opv_desc = |
| 860 | { &ntfs_vnodeop_p, ntfs_vnodeop_entries }; |
| 861 | |