1 /* $NetBSD: nilfs_vnops.c,v 1.32 2015/04/20 23:03:08 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 2008, 2009 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 #ifndef lint 31 __KERNEL_RCSID(0, "$NetBSD: nilfs_vnops.c,v 1.32 2015/04/20 23:03:08 riastradh Exp $"); 32 #endif /* not lint */ 33 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/namei.h> 38 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 39 #include <sys/kernel.h> 40 #include <sys/file.h> /* define FWRITE ... */ 41 #include <sys/stat.h> 42 #include <sys/buf.h> 43 #include <sys/proc.h> 44 #include <sys/mount.h> 45 #include <sys/vnode.h> 46 #include <sys/signalvar.h> 47 #include <sys/malloc.h> 48 #include <sys/dirent.h> 49 #include <sys/lockf.h> 50 #include <sys/kauth.h> 51 52 #include <miscfs/genfs/genfs.h> 53 #include <uvm/uvm_extern.h> 54 55 #include <fs/nilfs/nilfs_mount.h> 56 #include "nilfs.h" 57 #include "nilfs_subr.h" 58 #include "nilfs_bswap.h" 59 60 61 #define VTOI(vnode) ((struct nilfs_node *) (vnode)->v_data) 62 63 64 /* externs */ 65 extern int prtactive; 66 67 /* implementations of vnode functions; table follows at end */ 68 /* --------------------------------------------------------------------- */ 69 70 int 71 nilfs_inactive(void *v) 72 { 73 struct vop_inactive_args /* { 74 struct vnode *a_vp; 75 bool *a_recycle; 76 } */ *ap = v; 77 struct vnode *vp = ap->a_vp; 78 struct nilfs_node *nilfs_node = VTOI(vp); 79 80 DPRINTF(NODE, ("nilfs_inactive called for nilfs_node %p\n", VTOI(vp))); 81 82 if (nilfs_node == NULL) { 83 DPRINTF(NODE, ("nilfs_inactive: inactive NULL NILFS node\n")); 84 VOP_UNLOCK(vp); 85 return 0; 86 } 87 88 /* 89 * Optionally flush metadata to disc. If the file has not been 90 * referenced anymore in a directory we ought to free up the resources 91 * on disc if applicable. 92 */ 93 VOP_UNLOCK(vp); 94 95 return 0; 96 } 97 98 /* --------------------------------------------------------------------- */ 99 100 int 101 nilfs_reclaim(void *v) 102 { 103 struct vop_reclaim_args /* { 104 struct vnode *a_vp; 105 } */ *ap = v; 106 struct vnode *vp = ap->a_vp; 107 struct nilfs_node *nilfs_node = VTOI(vp); 108 109 DPRINTF(NODE, ("nilfs_reclaim called for node %p\n", nilfs_node)); 110 if (prtactive && vp->v_usecount > 1) 111 vprint("nilfs_reclaim(): pushing active", vp); 112 113 if (nilfs_node == NULL) { 114 DPRINTF(NODE, ("nilfs_reclaim(): null nilfsnode\n")); 115 return 0; 116 } 117 118 /* update note for closure */ 119 nilfs_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 120 121 /* remove from vnode cache. */ 122 vcache_remove(vp->v_mount, &nilfs_node->ino, sizeof(nilfs_node->ino)); 123 124 /* dispose all node knowledge */ 125 genfs_node_destroy(vp); 126 nilfs_dispose_node(&nilfs_node); 127 128 vp->v_data = NULL; 129 130 return 0; 131 } 132 133 /* --------------------------------------------------------------------- */ 134 135 int 136 nilfs_read(void *v) 137 { 138 struct vop_read_args /* { 139 struct vnode *a_vp; 140 struct uio *a_uio; 141 int a_ioflag; 142 kauth_cred_t a_cred; 143 } */ *ap = v; 144 struct vnode *vp = ap->a_vp; 145 struct uio *uio = ap->a_uio; 146 int ioflag = ap->a_ioflag; 147 int advice = IO_ADV_DECODE(ap->a_ioflag); 148 struct uvm_object *uobj; 149 struct nilfs_node *nilfs_node = VTOI(vp); 150 uint64_t file_size; 151 vsize_t len; 152 int error; 153 154 DPRINTF(READ, ("nilfs_read called\n")); 155 156 /* can this happen? some filingsystems have this check */ 157 if (uio->uio_offset < 0) 158 return EINVAL; 159 if (uio->uio_resid == 0) 160 return 0; 161 162 /* protect against rogue programs reading raw directories and links */ 163 if ((ioflag & IO_ALTSEMANTICS) == 0) { 164 if (vp->v_type == VDIR) 165 return EISDIR; 166 /* all but regular files just give EINVAL */ 167 if (vp->v_type != VREG) 168 return EINVAL; 169 } 170 171 assert(nilfs_node); 172 file_size = nilfs_rw64(nilfs_node->inode.i_size); 173 174 /* read contents using buffercache */ 175 uobj = &vp->v_uobj; 176 error = 0; 177 while (uio->uio_resid > 0) { 178 /* reached end? */ 179 if (file_size <= uio->uio_offset) 180 break; 181 182 /* maximise length to file extremity */ 183 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 184 if (len == 0) 185 break; 186 187 /* ubc, here we come, prepare to trap */ 188 error = ubc_uiomove(uobj, uio, len, advice, 189 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 190 if (error) 191 break; 192 } 193 194 /* note access time unless not requested */ 195 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 196 nilfs_node->i_flags |= IN_ACCESS; 197 if ((ioflag & IO_SYNC) == IO_SYNC) 198 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 199 } 200 201 return error; 202 } 203 204 /* --------------------------------------------------------------------- */ 205 206 int 207 nilfs_write(void *v) 208 { 209 struct vop_write_args /* { 210 struct vnode *a_vp; 211 struct uio *a_uio; 212 int a_ioflag; 213 kauth_cred_t a_cred; 214 } */ *ap = v; 215 struct vnode *vp = ap->a_vp; 216 struct uio *uio = ap->a_uio; 217 int ioflag = ap->a_ioflag; 218 int advice = IO_ADV_DECODE(ap->a_ioflag); 219 struct uvm_object *uobj; 220 struct nilfs_node *nilfs_node = VTOI(vp); 221 uint64_t file_size; 222 vsize_t len; 223 int error, resid, extended; 224 225 DPRINTF(WRITE, ("nilfs_write called\n")); 226 227 /* can this happen? some filingsystems have this check */ 228 if (uio->uio_offset < 0) 229 return EINVAL; 230 if (uio->uio_resid == 0) 231 return 0; 232 233 /* protect against rogue programs writing raw directories or links */ 234 if ((ioflag & IO_ALTSEMANTICS) == 0) { 235 if (vp->v_type == VDIR) 236 return EISDIR; 237 /* all but regular files just give EINVAL for now */ 238 if (vp->v_type != VREG) 239 return EINVAL; 240 } 241 242 assert(nilfs_node); 243 panic("nilfs_write() called\n"); 244 245 /* remember old file size */ 246 assert(nilfs_node); 247 file_size = nilfs_rw64(nilfs_node->inode.i_size); 248 249 /* if explicitly asked to append, uio_offset can be wrong? */ 250 if (ioflag & IO_APPEND) 251 uio->uio_offset = file_size; 252 253 #if 0 254 extended = (uio->uio_offset + uio->uio_resid > file_size); 255 if (extended) { 256 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 257 file_size, uio->uio_offset + uio->uio_resid)); 258 error = nilfs_grow_node(nilfs_node, uio->uio_offset + uio->uio_resid); 259 if (error) 260 return error; 261 file_size = uio->uio_offset + uio->uio_resid; 262 } 263 #endif 264 265 /* write contents using buffercache */ 266 uobj = &vp->v_uobj; 267 resid = uio->uio_resid; 268 error = 0; 269 270 uvm_vnp_setwritesize(vp, file_size); 271 while (uio->uio_resid > 0) { 272 /* maximise length to file extremity */ 273 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 274 if (len == 0) 275 break; 276 277 /* ubc, here we come, prepare to trap */ 278 error = ubc_uiomove(uobj, uio, len, advice, 279 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 280 if (error) 281 break; 282 } 283 uvm_vnp_setsize(vp, file_size); 284 285 /* mark node changed and request update */ 286 nilfs_node->i_flags |= IN_CHANGE | IN_UPDATE; 287 if (vp->v_mount->mnt_flag & MNT_RELATIME) 288 nilfs_node->i_flags |= IN_ACCESS; 289 290 /* 291 * XXX TODO FFS has code here to reset setuid & setgid when we're not 292 * the superuser as a precaution against tampering. 293 */ 294 295 /* if we wrote a thing, note write action on vnode */ 296 if (resid > uio->uio_resid) 297 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 298 299 if (error) { 300 /* bring back file size to its former size */ 301 /* take notice of its errors? */ 302 // (void) nilfs_chsize(vp, (u_quad_t) old_size, NOCRED); 303 304 /* roll back uio */ 305 uio->uio_offset -= resid - uio->uio_resid; 306 uio->uio_resid = resid; 307 } else { 308 /* if we write and we're synchronous, update node */ 309 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 310 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 311 } 312 313 return error; 314 } 315 316 317 /* --------------------------------------------------------------------- */ 318 319 /* 320 * bmap functionality that translates logical block numbers to the virtual 321 * block numbers to be stored on the vnode itself. 322 * 323 * Important alert! 324 * 325 * If runp is not NULL, the number of contiguous blocks __starting from the 326 * next block after the queried block__ will be returned in runp. 327 */ 328 329 int 330 nilfs_trivial_bmap(void *v) 331 { 332 struct vop_bmap_args /* { 333 struct vnode *a_vp; 334 daddr_t a_bn; 335 struct vnode **a_vpp; 336 daddr_t *a_bnp; 337 int *a_runp; 338 } */ *ap = v; 339 struct vnode *vp = ap->a_vp; /* our node */ 340 struct vnode **vpp = ap->a_vpp; /* return node */ 341 daddr_t *bnp = ap->a_bnp; /* translated */ 342 daddr_t bn = ap->a_bn; /* origional */ 343 int *runp = ap->a_runp; 344 struct nilfs_node *node = VTOI(vp); 345 uint64_t *l2vmap; 346 uint32_t blocksize; 347 int blks, run, error; 348 349 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 350 /* XXX could return `-1' to indicate holes/zero's */ 351 352 blocksize = node->nilfsdev->blocksize; 353 blks = MAXPHYS / blocksize; 354 355 /* get mapping memory */ 356 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 357 358 /* get virtual block numbers for the vnode's buffer span */ 359 error = nilfs_btree_nlookup(node, bn, blks, l2vmap); 360 if (error) { 361 free(l2vmap, M_TEMP); 362 return error; 363 } 364 365 /* store virtual blocks on our own vp */ 366 if (vpp) 367 *vpp = vp; 368 369 /* start at virt[0] */ 370 *bnp = l2vmap[0]; 371 372 /* get runlength */ 373 run = 1; 374 while ((run < blks) && (l2vmap[run] == *bnp + run)) 375 run++; 376 run--; /* see comment at start of function */ 377 378 /* set runlength */ 379 if (runp) 380 *runp = run; 381 382 DPRINTF(TRANSLATE, ("\tstart %"PRIu64" -> %"PRIu64" run %d\n", 383 bn, *bnp, run)); 384 385 /* mark not translated on virtual block number 0 */ 386 if (*bnp == 0) 387 *bnp = -1; 388 389 /* return success */ 390 free(l2vmap, M_TEMP); 391 return 0; 392 } 393 394 /* --------------------------------------------------------------------- */ 395 396 static void 397 nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 398 { 399 struct nilfs_device *nilfsdev = node->nilfsdev; 400 struct buf *nbp; 401 uint64_t *l2vmap, *v2pmap; 402 uint64_t from, blks; 403 uint32_t blocksize, buf_offset; 404 uint8_t *buf_pos; 405 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 406 int i, error; 407 408 /* 409 * Translate all the block sectors into a series of buffers to read 410 * asynchronously from the nilfs device. Note that this lookup may 411 * induce readin's too. 412 */ 413 414 blocksize = nilfsdev->blocksize; 415 416 from = bp->b_blkno; 417 blks = bp->b_bcount / blocksize; 418 419 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 420 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 421 422 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 423 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 424 425 /* get mapping memory */ 426 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 427 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 428 429 /* get virtual block numbers for the vnode's buffer span */ 430 for (i = 0; i < blks; i++) 431 l2vmap[i] = from + i; 432 433 /* translate virtual block numbers to physical block numbers */ 434 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 435 if (error) 436 goto out; 437 438 /* issue translated blocks */ 439 bp->b_resid = bp->b_bcount; 440 for (i = 0; i < blks; i++) { 441 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 442 "%"PRIu64" -> %"PRIu64"\n", 443 node->ino, i, l2vmap[i], v2pmap[i])); 444 445 buf_offset = i * blocksize; 446 buf_pos = (uint8_t *) bp->b_data + buf_offset; 447 448 /* note virtual block 0 marks not mapped */ 449 if (l2vmap[i] == 0) { 450 memset(buf_pos, 0, blocksize); 451 nestiobuf_done(bp, blocksize, 0); 452 continue; 453 } 454 455 /* nest iobuf */ 456 nbp = getiobuf(NULL, true); 457 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 458 KASSERT(nbp->b_vp == node->vnode); 459 /* nbp is B_ASYNC */ 460 461 nbp->b_lblkno = i; 462 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 463 nbp->b_rawblkno = nbp->b_blkno; 464 465 VOP_STRATEGY(nilfsdev->devvp, nbp); 466 } 467 468 if ((bp->b_flags & B_ASYNC) == 0) 469 biowait(bp); 470 471 out: 472 free(l2vmap, M_TEMP); 473 free(v2pmap, M_TEMP); 474 if (error) { 475 bp->b_error = EIO; 476 biodone(bp); 477 } 478 } 479 480 481 static void 482 nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 483 { 484 /* TODO pass on to segment collector */ 485 panic("nilfs_strategy writing called\n"); 486 } 487 488 489 int 490 nilfs_vfsstrategy(void *v) 491 { 492 struct vop_strategy_args /* { 493 struct vnode *a_vp; 494 struct buf *a_bp; 495 } */ *ap = v; 496 struct vnode *vp = ap->a_vp; 497 struct buf *bp = ap->a_bp; 498 struct nilfs_node *node = VTOI(vp); 499 500 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 501 502 /* check if we ought to be here */ 503 if (vp->v_type == VBLK || vp->v_type == VCHR) 504 panic("nilfs_strategy: spec"); 505 506 /* translate if needed and pass on */ 507 if (bp->b_flags & B_READ) { 508 nilfs_read_filebuf(node, bp); 509 return bp->b_error; 510 } 511 512 /* send to segment collector */ 513 nilfs_write_filebuf(node, bp); 514 return bp->b_error; 515 } 516 517 /* --------------------------------------------------------------------- */ 518 519 int 520 nilfs_readdir(void *v) 521 { 522 struct vop_readdir_args /* { 523 struct vnode *a_vp; 524 struct uio *a_uio; 525 kauth_cred_t a_cred; 526 int *a_eofflag; 527 off_t **a_cookies; 528 int *a_ncookies; 529 } */ *ap = v; 530 struct uio *uio = ap->a_uio; 531 struct vnode *vp = ap->a_vp; 532 struct nilfs_node *node = VTOI(vp); 533 struct nilfs_dir_entry *ndirent; 534 struct dirent dirent; 535 struct buf *bp; 536 uint64_t file_size, diroffset, transoffset, blkoff; 537 uint64_t blocknr; 538 uint32_t blocksize = node->nilfsdev->blocksize; 539 uint8_t *pos, name_len; 540 int error; 541 542 DPRINTF(READDIR, ("nilfs_readdir called\n")); 543 544 if (vp->v_type != VDIR) 545 return ENOTDIR; 546 547 file_size = nilfs_rw64(node->inode.i_size); 548 549 /* we are called just as long as we keep on pushing data in */ 550 error = 0; 551 if ((uio->uio_offset < file_size) && 552 (uio->uio_resid >= sizeof(struct dirent))) { 553 diroffset = uio->uio_offset; 554 transoffset = diroffset; 555 556 blocknr = diroffset / blocksize; 557 blkoff = diroffset % blocksize; 558 error = nilfs_bread(node, blocknr, 0, &bp); 559 if (error) 560 return EIO; 561 while (diroffset < file_size) { 562 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 563 diroffset)); 564 if (blkoff >= blocksize) { 565 blkoff = 0; blocknr++; 566 brelse(bp, BC_AGE); 567 error = nilfs_bread(node, blocknr, 0, &bp); 568 if (error) 569 return EIO; 570 } 571 572 /* read in one dirent */ 573 pos = (uint8_t *) bp->b_data + blkoff; 574 ndirent = (struct nilfs_dir_entry *) pos; 575 576 name_len = ndirent->name_len; 577 memset(&dirent, 0, sizeof(struct dirent)); 578 dirent.d_fileno = nilfs_rw64(ndirent->inode); 579 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 580 dirent.d_namlen = name_len; 581 strncpy(dirent.d_name, ndirent->name, name_len); 582 dirent.d_reclen = _DIRENT_SIZE(&dirent); 583 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 584 name_len, dirent.d_name)); 585 586 /* 587 * If there isn't enough space in the uio to return a 588 * whole dirent, break off read 589 */ 590 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 591 break; 592 593 /* transfer */ 594 if (name_len) 595 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 596 597 /* advance */ 598 diroffset += nilfs_rw16(ndirent->rec_len); 599 blkoff += nilfs_rw16(ndirent->rec_len); 600 601 /* remember the last entry we transfered */ 602 transoffset = diroffset; 603 } 604 brelse(bp, BC_AGE); 605 606 /* pass on last transfered offset */ 607 uio->uio_offset = transoffset; 608 } 609 610 if (ap->a_eofflag) 611 *ap->a_eofflag = (uio->uio_offset >= file_size); 612 613 return error; 614 } 615 616 /* --------------------------------------------------------------------- */ 617 618 int 619 nilfs_lookup(void *v) 620 { 621 struct vop_lookup_v2_args /* { 622 struct vnode *a_dvp; 623 struct vnode **a_vpp; 624 struct componentname *a_cnp; 625 } */ *ap = v; 626 struct vnode *dvp = ap->a_dvp; 627 struct vnode **vpp = ap->a_vpp; 628 struct componentname *cnp = ap->a_cnp; 629 struct mount *mp = dvp->v_mount; 630 uint64_t ino; 631 const char *name; 632 int namelen, nameiop, islastcn, mounted_ro; 633 int vnodetp; 634 int error, found; 635 636 *vpp = NULL; 637 638 DPRINTF(LOOKUP, ("nilfs_lookup called\n")); 639 640 /* simplify/clarification flags */ 641 nameiop = cnp->cn_nameiop; 642 islastcn = cnp->cn_flags & ISLASTCN; 643 mounted_ro = mp->mnt_flag & MNT_RDONLY; 644 645 /* check exec/dirread permissions first */ 646 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 647 if (error) 648 return error; 649 650 DPRINTF(LOOKUP, ("\taccess ok\n")); 651 652 /* 653 * If requesting a modify on the last path element on a read-only 654 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 655 */ 656 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 657 return EROFS; 658 659 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 660 cnp->cn_nameptr)); 661 /* look in the namecache */ 662 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 663 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 664 return *vpp == NULLVP ? ENOENT : 0; 665 } 666 667 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 668 669 /* 670 * Obviously, the file is not (anymore) in the namecache, we have to 671 * search for it. There are three basic cases: '.', '..' and others. 672 * 673 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 674 */ 675 error = 0; 676 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 677 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 678 /* special case 1 '.' */ 679 vref(dvp); 680 *vpp = dvp; 681 /* done */ 682 } else if (cnp->cn_flags & ISDOTDOT) { 683 /* special case 2 '..' */ 684 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 685 686 /* get our node */ 687 name = ".."; 688 namelen = 2; 689 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 690 &ino, &found); 691 if (error) 692 goto out; 693 if (!found) 694 error = ENOENT; 695 696 if (error == 0) { 697 DPRINTF(LOOKUP, ("\tfound '..'\n")); 698 /* try to create/reuse the node */ 699 error = vcache_get(mp, &ino, sizeof(ino), vpp); 700 701 if (!error) { 702 DPRINTF(LOOKUP, 703 ("\tnode retrieved/created OK\n")); 704 } 705 } 706 } else { 707 DPRINTF(LOOKUP, ("\tlookup file\n")); 708 /* all other files */ 709 /* lookup filename in the directory returning its inode */ 710 name = cnp->cn_nameptr; 711 namelen = cnp->cn_namelen; 712 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 713 &ino, &found); 714 if (error) 715 goto out; 716 if (!found) { 717 DPRINTF(LOOKUP, ("\tNOT found\n")); 718 /* 719 * UGH, didn't find name. If we're creating or 720 * renaming on the last name this is OK and we ought 721 * to return EJUSTRETURN if its allowed to be created. 722 */ 723 error = ENOENT; 724 if (islastcn && 725 (nameiop == CREATE || nameiop == RENAME)) 726 error = 0; 727 if (!error) { 728 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 729 if (!error) { 730 error = EJUSTRETURN; 731 } 732 } 733 /* done */ 734 } else { 735 /* try to create/reuse the node */ 736 error = vcache_get(mp, &ino, sizeof(ino), vpp); 737 if (!error) { 738 /* 739 * If we are not at the last path component 740 * and found a non-directory or non-link entry 741 * (which may itself be pointing to a 742 * directory), raise an error. 743 */ 744 vnodetp = (*vpp)->v_type; 745 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 746 if (!islastcn) { 747 vrele(*vpp); 748 *vpp = NULL; 749 error = ENOTDIR; 750 } 751 } 752 753 } 754 } 755 } 756 757 out: 758 /* 759 * Store result in the cache if requested. If we are creating a file, 760 * the file might not be found and thus putting it into the namecache 761 * might be seen as negative caching. 762 */ 763 if (error == 0 && nameiop != CREATE) 764 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 765 cnp->cn_flags); 766 767 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returing error %d\n", error)); 768 769 if (error) 770 return error; 771 return 0; 772 } 773 774 /* --------------------------------------------------------------------- */ 775 776 static void 777 nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 778 { 779 ts->tv_sec = ctime; 780 ts->tv_nsec = 0; 781 } 782 783 784 int 785 nilfs_getattr(void *v) 786 { 787 struct vop_getattr_args /* { 788 struct vnode *a_vp; 789 struct vattr *a_vap; 790 kauth_cred_t a_cred; 791 struct lwp *a_l; 792 } */ *ap = v; 793 struct vnode *vp = ap->a_vp; 794 struct vattr *vap = ap->a_vap; 795 struct nilfs_node *node = VTOI(vp); 796 struct nilfs_inode *inode = &node->inode; 797 798 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 799 800 /* basic info */ 801 vattr_null(vap); 802 vap->va_type = vp->v_type; 803 vap->va_mode = nilfs_rw16(inode->i_mode) & ALLPERMS; 804 vap->va_nlink = nilfs_rw16(inode->i_links_count); 805 vap->va_uid = nilfs_rw32(inode->i_uid); 806 vap->va_gid = nilfs_rw32(inode->i_gid); 807 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 808 vap->va_fileid = node->ino; 809 vap->va_size = nilfs_rw64(inode->i_size); 810 vap->va_blocksize = node->nilfsdev->blocksize; 811 812 /* times */ 813 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 814 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 815 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 816 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 817 818 vap->va_gen = nilfs_rw32(inode->i_generation); 819 vap->va_flags = 0; /* vattr flags */ 820 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 821 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 822 vap->va_vaflags = 0; /* XXX chflags flags */ 823 824 return 0; 825 } 826 827 /* --------------------------------------------------------------------- */ 828 829 #if 0 830 static int 831 nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 832 kauth_cred_t cred) 833 { 834 return EINVAL; 835 } 836 837 838 static int 839 nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 840 { 841 842 return EINVAL; 843 } 844 845 846 /* exported */ 847 int 848 nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 849 { 850 return EINVAL; 851 } 852 853 854 static int 855 nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 856 { 857 return EINVAL; 858 } 859 860 861 static int 862 nilfs_chtimes(struct vnode *vp, 863 struct timespec *atime, struct timespec *mtime, 864 struct timespec *birthtime, int setattrflags, 865 kauth_cred_t cred) 866 { 867 return EINVAL; 868 } 869 #endif 870 871 872 int 873 nilfs_setattr(void *v) 874 { 875 struct vop_setattr_args /* { 876 struct vnode *a_vp; 877 struct vattr *a_vap; 878 kauth_cred_t a_cred; 879 struct lwp *a_l; 880 } */ *ap = v; 881 struct vnode *vp = ap->a_vp; 882 883 vp = vp; 884 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 885 return EINVAL; 886 } 887 888 /* --------------------------------------------------------------------- */ 889 890 /* 891 * Return POSIX pathconf information for NILFS file systems. 892 */ 893 int 894 nilfs_pathconf(void *v) 895 { 896 struct vop_pathconf_args /* { 897 struct vnode *a_vp; 898 int a_name; 899 register_t *a_retval; 900 } */ *ap = v; 901 uint32_t bits; 902 903 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 904 905 switch (ap->a_name) { 906 case _PC_LINK_MAX: 907 *ap->a_retval = (1<<16)-1; /* 16 bits */ 908 return 0; 909 case _PC_NAME_MAX: 910 *ap->a_retval = NILFS_MAXNAMLEN; 911 return 0; 912 case _PC_PATH_MAX: 913 *ap->a_retval = PATH_MAX; 914 return 0; 915 case _PC_PIPE_BUF: 916 *ap->a_retval = PIPE_BUF; 917 return 0; 918 case _PC_CHOWN_RESTRICTED: 919 *ap->a_retval = 1; 920 return 0; 921 case _PC_NO_TRUNC: 922 *ap->a_retval = 1; 923 return 0; 924 case _PC_SYNC_IO: 925 *ap->a_retval = 0; /* synchronised is off for performance */ 926 return 0; 927 case _PC_FILESIZEBITS: 928 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 929 bits = 64; /* XXX ought to deliver 65 */ 930 #if 0 931 if (nilfs_node) 932 bits = 64 * vp->v_mount->mnt_dev_bshift; 933 #endif 934 *ap->a_retval = bits; 935 return 0; 936 } 937 938 return EINVAL; 939 } 940 941 942 /* --------------------------------------------------------------------- */ 943 944 int 945 nilfs_open(void *v) 946 { 947 struct vop_open_args /* { 948 struct vnode *a_vp; 949 int a_mode; 950 kauth_cred_t a_cred; 951 struct proc *a_p; 952 } */ *ap = v; 953 int flags; 954 955 DPRINTF(VFSCALL, ("nilfs_open called\n")); 956 957 /* 958 * Files marked append-only must be opened for appending. 959 */ 960 flags = 0; 961 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 962 return (EPERM); 963 964 return 0; 965 } 966 967 968 /* --------------------------------------------------------------------- */ 969 970 int 971 nilfs_close(void *v) 972 { 973 struct vop_close_args /* { 974 struct vnode *a_vp; 975 int a_fflag; 976 kauth_cred_t a_cred; 977 struct proc *a_p; 978 } */ *ap = v; 979 struct vnode *vp = ap->a_vp; 980 struct nilfs_node *nilfs_node = VTOI(vp); 981 982 DPRINTF(VFSCALL, ("nilfs_close called\n")); 983 nilfs_node = nilfs_node; /* shut up gcc */ 984 985 mutex_enter(vp->v_interlock); 986 if (vp->v_usecount > 1) 987 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 988 mutex_exit(vp->v_interlock); 989 990 return 0; 991 } 992 993 994 /* --------------------------------------------------------------------- */ 995 996 static int 997 nilfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 998 { 999 int flags; 1000 1001 /* check if we are allowed to write */ 1002 switch (vap->va_type) { 1003 case VDIR: 1004 case VLNK: 1005 case VREG: 1006 /* 1007 * normal nodes: check if we're on a read-only mounted 1008 * filingsystem and bomb out if we're trying to write. 1009 */ 1010 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1011 return EROFS; 1012 break; 1013 case VBLK: 1014 case VCHR: 1015 case VSOCK: 1016 case VFIFO: 1017 /* 1018 * special nodes: even on read-only mounted filingsystems 1019 * these are allowed to be written to if permissions allow. 1020 */ 1021 break; 1022 default: 1023 /* no idea what this is */ 1024 return EINVAL; 1025 } 1026 1027 /* noone may write immutable files */ 1028 /* TODO: get chflags(2) flags */ 1029 flags = 0; 1030 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1031 return EPERM; 1032 1033 return 0; 1034 } 1035 1036 static int 1037 nilfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1038 kauth_cred_t cred) 1039 { 1040 1041 /* ask the generic genfs_can_access to advice on security */ 1042 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1043 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1044 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1045 } 1046 1047 int 1048 nilfs_access(void *v) 1049 { 1050 struct vop_access_args /* { 1051 struct vnode *a_vp; 1052 int a_mode; 1053 kauth_cred_t a_cred; 1054 struct proc *a_p; 1055 } */ *ap = v; 1056 struct vnode *vp = ap->a_vp; 1057 mode_t mode = ap->a_mode; 1058 kauth_cred_t cred = ap->a_cred; 1059 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1060 struct vattr vap; 1061 int error; 1062 1063 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1064 1065 error = VOP_GETATTR(vp, &vap, NULL); 1066 if (error) 1067 return error; 1068 1069 error = nilfs_check_possible(vp, &vap, mode); 1070 if (error) 1071 return error; 1072 1073 error = nilfs_check_permitted(vp, &vap, mode, cred); 1074 1075 return error; 1076 } 1077 1078 /* --------------------------------------------------------------------- */ 1079 1080 int 1081 nilfs_create(void *v) 1082 { 1083 struct vop_create_v3_args /* { 1084 struct vnode *a_dvp; 1085 struct vnode **a_vpp; 1086 struct componentname *a_cnp; 1087 struct vattr *a_vap; 1088 } */ *ap = v; 1089 struct vnode *dvp = ap->a_dvp; 1090 struct vnode **vpp = ap->a_vpp; 1091 struct vattr *vap = ap->a_vap; 1092 struct componentname *cnp = ap->a_cnp; 1093 int error; 1094 1095 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1096 error = nilfs_create_node(dvp, vpp, vap, cnp); 1097 1098 return error; 1099 } 1100 1101 /* --------------------------------------------------------------------- */ 1102 1103 int 1104 nilfs_mknod(void *v) 1105 { 1106 struct vop_mknod_v3_args /* { 1107 struct vnode *a_dvp; 1108 struct vnode **a_vpp; 1109 struct componentname *a_cnp; 1110 struct vattr *a_vap; 1111 } */ *ap = v; 1112 struct vnode *dvp = ap->a_dvp; 1113 struct vnode **vpp = ap->a_vpp; 1114 struct vattr *vap = ap->a_vap; 1115 struct componentname *cnp = ap->a_cnp; 1116 int error; 1117 1118 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1119 error = nilfs_create_node(dvp, vpp, vap, cnp); 1120 1121 return error; 1122 } 1123 1124 /* --------------------------------------------------------------------- */ 1125 1126 int 1127 nilfs_mkdir(void *v) 1128 { 1129 struct vop_mkdir_v3_args /* { 1130 struct vnode *a_dvp; 1131 struct vnode **a_vpp; 1132 struct componentname *a_cnp; 1133 struct vattr *a_vap; 1134 } */ *ap = v; 1135 struct vnode *dvp = ap->a_dvp; 1136 struct vnode **vpp = ap->a_vpp; 1137 struct vattr *vap = ap->a_vap; 1138 struct componentname *cnp = ap->a_cnp; 1139 int error; 1140 1141 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1142 error = nilfs_create_node(dvp, vpp, vap, cnp); 1143 1144 return error; 1145 } 1146 1147 /* --------------------------------------------------------------------- */ 1148 1149 static int 1150 nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1151 { 1152 struct nilfs_node *nilfs_node, *dir_node; 1153 struct vattr vap; 1154 int error; 1155 1156 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1157 KASSERT(dvp != vp); 1158 KASSERT(vp->v_type != VDIR); 1159 KASSERT(dvp->v_mount == vp->v_mount); 1160 1161 /* lock node */ 1162 error = vn_lock(vp, LK_EXCLUSIVE); 1163 if (error) 1164 return error; 1165 1166 /* get attributes */ 1167 dir_node = VTOI(dvp); 1168 nilfs_node = VTOI(vp); 1169 1170 error = VOP_GETATTR(vp, &vap, FSCRED); 1171 if (error) { 1172 VOP_UNLOCK(vp); 1173 return error; 1174 } 1175 1176 /* check link count overflow */ 1177 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1178 VOP_UNLOCK(vp); 1179 return EMLINK; 1180 } 1181 1182 error = nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, 1183 &vap, cnp); 1184 if (error) 1185 VOP_UNLOCK(vp); 1186 return error; 1187 } 1188 1189 int 1190 nilfs_link(void *v) 1191 { 1192 struct vop_link_v2_args /* { 1193 struct vnode *a_dvp; 1194 struct vnode *a_vp; 1195 struct componentname *a_cnp; 1196 } */ *ap = v; 1197 struct vnode *dvp = ap->a_dvp; 1198 struct vnode *vp = ap->a_vp; 1199 struct componentname *cnp = ap->a_cnp; 1200 int error; 1201 1202 error = nilfs_do_link(dvp, vp, cnp); 1203 if (error) 1204 VOP_ABORTOP(dvp, cnp); 1205 1206 VN_KNOTE(vp, NOTE_LINK); 1207 VN_KNOTE(dvp, NOTE_WRITE); 1208 1209 return error; 1210 } 1211 1212 /* --------------------------------------------------------------------- */ 1213 1214 static int 1215 nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1216 { 1217 return EROFS; 1218 } 1219 1220 1221 int 1222 nilfs_symlink(void *v) 1223 { 1224 struct vop_symlink_v3_args /* { 1225 struct vnode *a_dvp; 1226 struct vnode **a_vpp; 1227 struct componentname *a_cnp; 1228 struct vattr *a_vap; 1229 char *a_target; 1230 } */ *ap = v; 1231 struct vnode *dvp = ap->a_dvp; 1232 struct vnode **vpp = ap->a_vpp; 1233 struct vattr *vap = ap->a_vap; 1234 struct componentname *cnp = ap->a_cnp; 1235 struct nilfs_node *dir_node; 1236 struct nilfs_node *nilfs_node; 1237 int error; 1238 1239 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1240 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1241 error = nilfs_create_node(dvp, vpp, vap, cnp); 1242 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1243 if (!error) { 1244 dir_node = VTOI(dvp); 1245 nilfs_node = VTOI(*vpp); 1246 KASSERT(nilfs_node); 1247 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1248 if (error) { 1249 /* remove node */ 1250 nilfs_shrink_node(nilfs_node, 0); 1251 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1252 } 1253 } 1254 return error; 1255 } 1256 1257 /* --------------------------------------------------------------------- */ 1258 1259 int 1260 nilfs_readlink(void *v) 1261 { 1262 struct vop_readlink_args /* { 1263 struct vnode *a_vp; 1264 struct uio *a_uio; 1265 kauth_cred_t a_cred; 1266 } */ *ap = v; 1267 #if 0 1268 struct vnode *vp = ap->a_vp; 1269 struct uio *uio = ap->a_uio; 1270 kauth_cred_t cred = ap->a_cred; 1271 struct nilfs_node *nilfs_node; 1272 struct pathcomp pathcomp; 1273 struct vattr vattr; 1274 uint8_t *pathbuf, *targetbuf, *tmpname; 1275 uint8_t *pathpos, *targetpos; 1276 char *mntonname; 1277 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1278 int first, error; 1279 #endif 1280 ap = ap; 1281 1282 DPRINTF(VFSCALL, ("nilfs_readlink called\n")); 1283 1284 return EROFS; 1285 } 1286 1287 /* --------------------------------------------------------------------- */ 1288 1289 /* note: i tried to follow the logics of the tmpfs rename code */ 1290 int 1291 nilfs_rename(void *v) 1292 { 1293 struct vop_rename_args /* { 1294 struct vnode *a_fdvp; 1295 struct vnode *a_fvp; 1296 struct componentname *a_fcnp; 1297 struct vnode *a_tdvp; 1298 struct vnode *a_tvp; 1299 struct componentname *a_tcnp; 1300 } */ *ap = v; 1301 struct vnode *tvp = ap->a_tvp; 1302 struct vnode *tdvp = ap->a_tdvp; 1303 struct vnode *fvp = ap->a_fvp; 1304 struct vnode *fdvp = ap->a_fdvp; 1305 struct componentname *tcnp = ap->a_tcnp; 1306 struct componentname *fcnp = ap->a_fcnp; 1307 struct nilfs_node *fnode, *fdnode, *tnode, *tdnode; 1308 struct vattr fvap, tvap; 1309 int error; 1310 1311 DPRINTF(VFSCALL, ("nilfs_rename called\n")); 1312 1313 /* disallow cross-device renames */ 1314 if (fvp->v_mount != tdvp->v_mount || 1315 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1316 error = EXDEV; 1317 goto out_unlocked; 1318 } 1319 1320 fnode = VTOI(fvp); 1321 fdnode = VTOI(fdvp); 1322 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1323 tdnode = VTOI(tdvp); 1324 1325 /* lock our source dir */ 1326 if (fdnode != tdnode) { 1327 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1328 if (error != 0) 1329 goto out_unlocked; 1330 } 1331 1332 /* get info about the node to be moved */ 1333 vn_lock(fvp, LK_SHARED | LK_RETRY); 1334 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1335 VOP_UNLOCK(fvp); 1336 KASSERT(error == 0); 1337 1338 /* check when to delete the old already existing entry */ 1339 if (tvp) { 1340 /* get info about the node to be moved to */ 1341 error = VOP_GETATTR(tvp, &tvap, FSCRED); 1342 KASSERT(error == 0); 1343 1344 /* if both dirs, make sure the destination is empty */ 1345 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1346 if (tvap.va_nlink > 2) { 1347 error = ENOTEMPTY; 1348 goto out; 1349 } 1350 } 1351 /* if moving dir, make sure destination is dir too */ 1352 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1353 error = ENOTDIR; 1354 goto out; 1355 } 1356 /* if we're moving a non-directory, make sure dest is no dir */ 1357 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1358 error = EISDIR; 1359 goto out; 1360 } 1361 } 1362 1363 /* dont allow renaming directories acros directory for now */ 1364 if (fdnode != tdnode) { 1365 if (fvp->v_type == VDIR) { 1366 error = EINVAL; 1367 goto out; 1368 } 1369 } 1370 1371 /* remove existing entry if present */ 1372 if (tvp) 1373 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1374 1375 /* create new directory entry for the node */ 1376 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1377 if (error) 1378 goto out; 1379 1380 /* unlink old directory entry for the node, if failing, unattach new */ 1381 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1382 if (error) 1383 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1384 1385 out: 1386 if (fdnode != tdnode) 1387 VOP_UNLOCK(fdvp); 1388 1389 out_unlocked: 1390 VOP_ABORTOP(tdvp, tcnp); 1391 if (tdvp == tvp) 1392 vrele(tdvp); 1393 else 1394 vput(tdvp); 1395 if (tvp) 1396 vput(tvp); 1397 VOP_ABORTOP(fdvp, fcnp); 1398 1399 /* release source nodes. */ 1400 vrele(fdvp); 1401 vrele(fvp); 1402 1403 return error; 1404 } 1405 1406 /* --------------------------------------------------------------------- */ 1407 1408 int 1409 nilfs_remove(void *v) 1410 { 1411 struct vop_remove_args /* { 1412 struct vnode *a_dvp; 1413 struct vnode *a_vp; 1414 struct componentname *a_cnp; 1415 } */ *ap = v; 1416 struct vnode *dvp = ap->a_dvp; 1417 struct vnode *vp = ap->a_vp; 1418 struct componentname *cnp = ap->a_cnp; 1419 struct nilfs_node *dir_node = VTOI(dvp); 1420 struct nilfs_node *nilfs_node = VTOI(vp); 1421 struct nilfs_mount *ump = dir_node->ump; 1422 int error; 1423 1424 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1425 if (vp->v_type != VDIR) { 1426 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1427 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1428 } else { 1429 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1430 error = EPERM; 1431 } 1432 1433 if (error == 0) { 1434 VN_KNOTE(vp, NOTE_DELETE); 1435 VN_KNOTE(dvp, NOTE_WRITE); 1436 } 1437 1438 if (dvp == vp) 1439 vrele(vp); 1440 else 1441 vput(vp); 1442 vput(dvp); 1443 1444 return error; 1445 } 1446 1447 /* --------------------------------------------------------------------- */ 1448 1449 int 1450 nilfs_rmdir(void *v) 1451 { 1452 struct vop_rmdir_args /* { 1453 struct vnode *a_dvp; 1454 struct vnode *a_vp; 1455 struct componentname *a_cnp; 1456 } */ *ap = v; 1457 struct vnode *vp = ap->a_vp; 1458 struct vnode *dvp = ap->a_dvp; 1459 struct componentname *cnp = ap->a_cnp; 1460 struct nilfs_node *dir_node = VTOI(dvp); 1461 struct nilfs_node *nilfs_node = VTOI(vp); 1462 struct nilfs_mount *ump = dir_node->ump; 1463 int refcnt, error; 1464 1465 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1466 1467 /* don't allow '.' to be deleted */ 1468 if (dir_node == nilfs_node) { 1469 vrele(dvp); 1470 vput(vp); 1471 return EINVAL; 1472 } 1473 1474 /* check to see if the directory is empty */ 1475 error = 0; 1476 refcnt = 2; /* XXX */ 1477 if (refcnt > 1) { 1478 /* NOT empty */ 1479 vput(dvp); 1480 vput(vp); 1481 return ENOTEMPTY; 1482 } 1483 1484 /* detach the node from the directory */ 1485 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1486 if (error == 0) { 1487 cache_purge(vp); 1488 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1489 VN_KNOTE(vp, NOTE_DELETE); 1490 } 1491 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1492 1493 /* unput the nodes and exit */ 1494 vput(dvp); 1495 vput(vp); 1496 1497 return error; 1498 } 1499 1500 /* --------------------------------------------------------------------- */ 1501 1502 int 1503 nilfs_fsync(void *v) 1504 { 1505 struct vop_fsync_args /* { 1506 struct vnode *a_vp; 1507 kauth_cred_t a_cred; 1508 int a_flags; 1509 off_t offlo; 1510 off_t offhi; 1511 struct proc *a_p; 1512 } */ *ap = v; 1513 struct vnode *vp = ap->a_vp; 1514 // struct nilfs_node *nilfs_node = VTOI(vp); 1515 // int error, flags, wait; 1516 1517 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1518 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1519 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1520 1521 vp = vp; 1522 return 0; 1523 } 1524 1525 /* --------------------------------------------------------------------- */ 1526 1527 int 1528 nilfs_advlock(void *v) 1529 { 1530 struct vop_advlock_args /* { 1531 struct vnode *a_vp; 1532 void *a_id; 1533 int a_op; 1534 struct flock *a_fl; 1535 int a_flags; 1536 } */ *ap = v; 1537 struct vnode *vp = ap->a_vp; 1538 struct nilfs_node *nilfs_node = VTOI(vp); 1539 uint64_t file_size; 1540 1541 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1542 1543 assert(nilfs_node); 1544 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1545 1546 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1547 } 1548 1549 /* --------------------------------------------------------------------- */ 1550 1551 1552 /* Global vfs vnode data structures for nilfss */ 1553 int (**nilfs_vnodeop_p) __P((void *)); 1554 1555 const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1556 { &vop_default_desc, vn_default_error }, 1557 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1558 { &vop_create_desc, nilfs_create }, /* create */ 1559 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1560 { &vop_open_desc, nilfs_open }, /* open */ 1561 { &vop_close_desc, nilfs_close }, /* close */ 1562 { &vop_access_desc, nilfs_access }, /* access */ 1563 { &vop_getattr_desc, nilfs_getattr }, /* getattr */ 1564 { &vop_setattr_desc, nilfs_setattr }, /* setattr */ /* TODO chflags */ 1565 { &vop_read_desc, nilfs_read }, /* read */ 1566 { &vop_write_desc, nilfs_write }, /* write */ /* WRITE */ 1567 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 1568 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 1569 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1570 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1571 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1572 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1573 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1574 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1575 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1576 { &vop_seek_desc, genfs_seek }, /* seek */ 1577 { &vop_remove_desc, nilfs_remove }, /* remove */ 1578 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1579 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1580 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1581 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1582 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1583 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1584 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1585 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1586 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1587 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1588 { &vop_lock_desc, genfs_lock }, /* lock */ 1589 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1590 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1591 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1592 /* { &vop_print_desc, nilfs_print }, */ /* print */ 1593 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1594 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1595 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1596 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1597 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1598 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1599 { NULL, NULL } 1600 }; 1601 1602 1603 const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1604 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1605 }; 1606 1607