1 /* $NetBSD: nilfs_vnops.c,v 1.13 2011/06/19 02:42:53 rmind 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 1.13 2011/06/19 02:42:53 rmind 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 /* dispose all node knowledge */ 122 nilfs_dispose_node(&nilfs_node); 123 124 return 0; 125 } 126 127 /* --------------------------------------------------------------------- */ 128 129 int 130 nilfs_read(void *v) 131 { 132 struct vop_read_args /* { 133 struct vnode *a_vp; 134 struct uio *a_uio; 135 int a_ioflag; 136 kauth_cred_t a_cred; 137 } */ *ap = v; 138 struct vnode *vp = ap->a_vp; 139 struct uio *uio = ap->a_uio; 140 int ioflag = ap->a_ioflag; 141 int advice = IO_ADV_DECODE(ap->a_ioflag); 142 struct uvm_object *uobj; 143 struct nilfs_node *nilfs_node = VTOI(vp); 144 uint64_t file_size; 145 vsize_t len; 146 int error; 147 148 DPRINTF(READ, ("nilfs_read called\n")); 149 150 /* can this happen? some filingsystems have this check */ 151 if (uio->uio_offset < 0) 152 return EINVAL; 153 if (uio->uio_resid == 0) 154 return 0; 155 156 /* protect against rogue programs reading raw directories and links */ 157 if ((ioflag & IO_ALTSEMANTICS) == 0) { 158 if (vp->v_type == VDIR) 159 return EISDIR; 160 /* all but regular files just give EINVAL */ 161 if (vp->v_type != VREG) 162 return EINVAL; 163 } 164 165 assert(nilfs_node); 166 file_size = nilfs_rw64(nilfs_node->inode.i_size); 167 168 /* read contents using buffercache */ 169 uobj = &vp->v_uobj; 170 error = 0; 171 while (uio->uio_resid > 0) { 172 /* reached end? */ 173 if (file_size <= uio->uio_offset) 174 break; 175 176 /* maximise length to file extremity */ 177 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 178 if (len == 0) 179 break; 180 181 /* ubc, here we come, prepare to trap */ 182 error = ubc_uiomove(uobj, uio, len, advice, 183 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 184 if (error) 185 break; 186 } 187 188 /* note access time unless not requested */ 189 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 190 nilfs_node->i_flags |= IN_ACCESS; 191 if ((ioflag & IO_SYNC) == IO_SYNC) 192 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 193 } 194 195 return error; 196 } 197 198 /* --------------------------------------------------------------------- */ 199 200 int 201 nilfs_write(void *v) 202 { 203 struct vop_write_args /* { 204 struct vnode *a_vp; 205 struct uio *a_uio; 206 int a_ioflag; 207 kauth_cred_t a_cred; 208 } */ *ap = v; 209 struct vnode *vp = ap->a_vp; 210 struct uio *uio = ap->a_uio; 211 int ioflag = ap->a_ioflag; 212 int advice = IO_ADV_DECODE(ap->a_ioflag); 213 struct uvm_object *uobj; 214 struct nilfs_node *nilfs_node = VTOI(vp); 215 uint64_t file_size, old_size; 216 vsize_t len; 217 int error, resid, extended; 218 219 DPRINTF(WRITE, ("nilfs_write called\n")); 220 221 /* can this happen? some filingsystems have this check */ 222 if (uio->uio_offset < 0) 223 return EINVAL; 224 if (uio->uio_resid == 0) 225 return 0; 226 227 /* protect against rogue programs writing raw directories or links */ 228 if ((ioflag & IO_ALTSEMANTICS) == 0) { 229 if (vp->v_type == VDIR) 230 return EISDIR; 231 /* all but regular files just give EINVAL for now */ 232 if (vp->v_type != VREG) 233 return EINVAL; 234 } 235 236 assert(nilfs_node); 237 panic("nilfs_write() called\n"); 238 return EIO; 239 240 /* remember old file size */ 241 assert(nilfs_node); 242 file_size = nilfs_rw64(nilfs_node->inode.i_size); 243 old_size = file_size; 244 245 /* if explicitly asked to append, uio_offset can be wrong? */ 246 if (ioflag & IO_APPEND) 247 uio->uio_offset = file_size; 248 249 #if 0 250 extended = (uio->uio_offset + uio->uio_resid > file_size); 251 if (extended) { 252 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 253 file_size, uio->uio_offset + uio->uio_resid)); 254 error = nilfs_grow_node(nilfs_node, uio->uio_offset + uio->uio_resid); 255 if (error) 256 return error; 257 file_size = uio->uio_offset + uio->uio_resid; 258 } 259 #endif 260 261 /* write contents using buffercache */ 262 uobj = &vp->v_uobj; 263 resid = uio->uio_resid; 264 error = 0; 265 266 uvm_vnp_setwritesize(vp, file_size); 267 while (uio->uio_resid > 0) { 268 /* maximise length to file extremity */ 269 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 270 if (len == 0) 271 break; 272 273 /* ubc, here we come, prepare to trap */ 274 error = ubc_uiomove(uobj, uio, len, advice, 275 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 276 if (error) 277 break; 278 } 279 uvm_vnp_setsize(vp, file_size); 280 281 /* mark node changed and request update */ 282 nilfs_node->i_flags |= IN_CHANGE | IN_UPDATE; 283 284 /* 285 * XXX TODO FFS has code here to reset setuid & setgid when we're not 286 * the superuser as a precaution against tampering. 287 */ 288 289 /* if we wrote a thing, note write action on vnode */ 290 if (resid > uio->uio_resid) 291 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 292 293 if (error) { 294 /* bring back file size to its former size */ 295 /* take notice of its errors? */ 296 // (void) nilfs_chsize(vp, (u_quad_t) old_size, NOCRED); 297 298 /* roll back uio */ 299 uio->uio_offset -= resid - uio->uio_resid; 300 uio->uio_resid = resid; 301 } else { 302 /* if we write and we're synchronous, update node */ 303 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 304 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 305 } 306 307 return error; 308 } 309 310 311 /* --------------------------------------------------------------------- */ 312 313 /* 314 * bmap functionality that translates logical block numbers to the virtual 315 * block numbers to be stored on the vnode itself. 316 */ 317 318 int 319 nilfs_trivial_bmap(void *v) 320 { 321 struct vop_bmap_args /* { 322 struct vnode *a_vp; 323 daddr_t a_bn; 324 struct vnode **a_vpp; 325 daddr_t *a_bnp; 326 int *a_runp; 327 } */ *ap = v; 328 struct vnode *vp = ap->a_vp; /* our node */ 329 struct vnode **vpp = ap->a_vpp; /* return node */ 330 daddr_t *bnp = ap->a_bnp; /* translated */ 331 daddr_t bn = ap->a_bn; /* origional */ 332 int *runp = ap->a_runp; 333 struct nilfs_node *node = VTOI(vp); 334 uint64_t *l2vmap; 335 uint32_t blocksize; 336 int blks, run, error; 337 338 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 339 /* XXX could return `-1' to indicate holes/zero's */ 340 341 blocksize = node->nilfsdev->blocksize; 342 blks = MAXPHYS / blocksize; 343 344 /* get mapping memory */ 345 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 346 347 /* get virtual block numbers for the vnode's buffer span */ 348 error = nilfs_btree_nlookup(node, bn, blks, l2vmap); 349 if (error) { 350 free(l2vmap, M_TEMP); 351 return error; 352 } 353 354 /* store virtual blocks on our own vp */ 355 if (vpp) 356 *vpp = vp; 357 358 /* start at virt[0] */ 359 *bnp = l2vmap[0]; 360 361 /* get runlength */ 362 run = 1; 363 while ((run < blks) && (l2vmap[run] == *bnp + run)) 364 run++; 365 366 /* set runlength */ 367 if (runp) 368 *runp = run; 369 370 DPRINTF(TRANSLATE, ("\tstart %"PRIu64" -> %"PRIu64" run %d\n", 371 bn, *bnp, run)); 372 373 /* mark not translated on virtual block number 0 */ 374 if (*bnp == 0) 375 *bnp = -1; 376 377 /* return success */ 378 free(l2vmap, M_TEMP); 379 return 0; 380 } 381 382 /* --------------------------------------------------------------------- */ 383 384 static void 385 nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 386 { 387 struct nilfs_device *nilfsdev = node->nilfsdev; 388 struct buf *nbp; 389 uint64_t *l2vmap, *v2pmap; 390 uint64_t from, blks; 391 uint32_t blocksize, buf_offset; 392 uint8_t *buf_pos; 393 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 394 int i, error; 395 396 /* 397 * Translate all the block sectors into a series of buffers to read 398 * asynchronously from the nilfs device. Note that this lookup may 399 * induce readin's too. 400 */ 401 402 blocksize = nilfsdev->blocksize; 403 404 from = bp->b_blkno; 405 blks = bp->b_bcount / blocksize; 406 407 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 408 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 409 410 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 411 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 412 413 /* get mapping memory */ 414 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 415 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 416 417 /* get virtual block numbers for the vnode's buffer span */ 418 for (i = 0; i < blks; i++) 419 l2vmap[i] = from + i; 420 421 /* translate virtual block numbers to physical block numbers */ 422 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 423 if (error) 424 goto out; 425 426 /* issue translated blocks */ 427 bp->b_resid = bp->b_bcount; 428 for (i = 0; i < blks; i++) { 429 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 430 "%"PRIu64" -> %"PRIu64"\n", 431 node->ino, i, l2vmap[i], v2pmap[i])); 432 433 buf_offset = i * blocksize; 434 buf_pos = (uint8_t *) bp->b_data + buf_offset; 435 436 /* note virtual block 0 marks not mapped */ 437 if (l2vmap[i] == 0) { 438 memset(buf_pos, 0, blocksize); 439 nestiobuf_done(bp, blocksize, 0); 440 continue; 441 } 442 443 /* nest iobuf */ 444 nbp = getiobuf(NULL, true); 445 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 446 KASSERT(nbp->b_vp == node->vnode); 447 /* nbp is B_ASYNC */ 448 449 nbp->b_lblkno = i; 450 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 451 nbp->b_rawblkno = nbp->b_blkno; 452 453 VOP_STRATEGY(nilfsdev->devvp, nbp); 454 } 455 456 if ((bp->b_flags & B_ASYNC) == 0) 457 biowait(bp); 458 459 out: 460 free(l2vmap, M_TEMP); 461 free(v2pmap, M_TEMP); 462 if (error) { 463 bp->b_error = EIO; 464 biodone(bp); 465 } 466 } 467 468 469 static void 470 nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 471 { 472 /* TODO pass on to segment collector */ 473 panic("nilfs_strategy writing called\n"); 474 } 475 476 477 int 478 nilfs_vfsstrategy(void *v) 479 { 480 struct vop_strategy_args /* { 481 struct vnode *a_vp; 482 struct buf *a_bp; 483 } */ *ap = v; 484 struct vnode *vp = ap->a_vp; 485 struct buf *bp = ap->a_bp; 486 struct nilfs_node *node = VTOI(vp); 487 488 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 489 490 /* check if we ought to be here */ 491 if (vp->v_type == VBLK || vp->v_type == VCHR) 492 panic("nilfs_strategy: spec"); 493 494 /* translate if needed and pass on */ 495 if (bp->b_flags & B_READ) { 496 nilfs_read_filebuf(node, bp); 497 return bp->b_error; 498 } 499 500 /* send to segment collector */ 501 nilfs_write_filebuf(node, bp); 502 return bp->b_error; 503 } 504 505 /* --------------------------------------------------------------------- */ 506 507 int 508 nilfs_readdir(void *v) 509 { 510 struct vop_readdir_args /* { 511 struct vnode *a_vp; 512 struct uio *a_uio; 513 kauth_cred_t a_cred; 514 int *a_eofflag; 515 off_t **a_cookies; 516 int *a_ncookies; 517 } */ *ap = v; 518 struct uio *uio = ap->a_uio; 519 struct vnode *vp = ap->a_vp; 520 struct nilfs_node *node = VTOI(vp); 521 struct nilfs_dir_entry *ndirent; 522 struct dirent dirent; 523 struct buf *bp; 524 uint64_t file_size, diroffset, transoffset, blkoff; 525 uint64_t blocknr; 526 uint32_t blocksize = node->nilfsdev->blocksize; 527 uint8_t *pos, name_len; 528 int error; 529 530 DPRINTF(READDIR, ("nilfs_readdir called\n")); 531 532 if (vp->v_type != VDIR) 533 return ENOTDIR; 534 535 file_size = nilfs_rw64(node->inode.i_size); 536 537 /* we are called just as long as we keep on pushing data in */ 538 error = 0; 539 if ((uio->uio_offset < file_size) && 540 (uio->uio_resid >= sizeof(struct dirent))) { 541 diroffset = uio->uio_offset; 542 transoffset = diroffset; 543 544 blocknr = diroffset / blocksize; 545 blkoff = diroffset % blocksize; 546 error = nilfs_bread(node, blocknr, NOCRED, 0, &bp); 547 if (error) 548 return EIO; 549 while (diroffset < file_size) { 550 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 551 diroffset)); 552 if (blkoff >= blocksize) { 553 blkoff = 0; blocknr++; 554 brelse(bp, BC_AGE); 555 error = nilfs_bread(node, blocknr, NOCRED, 0, 556 &bp); 557 if (error) 558 return EIO; 559 } 560 561 /* read in one dirent */ 562 pos = (uint8_t *) bp->b_data + blkoff; 563 ndirent = (struct nilfs_dir_entry *) pos; 564 565 name_len = ndirent->name_len; 566 memset(&dirent, 0, sizeof(struct dirent)); 567 dirent.d_fileno = nilfs_rw64(ndirent->inode); 568 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 569 dirent.d_namlen = name_len; 570 strncpy(dirent.d_name, ndirent->name, name_len); 571 dirent.d_reclen = _DIRENT_SIZE(&dirent); 572 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 573 name_len, dirent.d_name)); 574 575 /* 576 * If there isn't enough space in the uio to return a 577 * whole dirent, break off read 578 */ 579 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 580 break; 581 582 /* transfer */ 583 if (name_len) 584 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 585 586 /* advance */ 587 diroffset += nilfs_rw16(ndirent->rec_len); 588 blkoff += nilfs_rw16(ndirent->rec_len); 589 590 /* remember the last entry we transfered */ 591 transoffset = diroffset; 592 } 593 brelse(bp, BC_AGE); 594 595 /* pass on last transfered offset */ 596 uio->uio_offset = transoffset; 597 } 598 599 if (ap->a_eofflag) 600 *ap->a_eofflag = (uio->uio_offset >= file_size); 601 602 return error; 603 } 604 605 /* --------------------------------------------------------------------- */ 606 607 int 608 nilfs_lookup(void *v) 609 { 610 struct vop_lookup_args /* { 611 struct vnode *a_dvp; 612 struct vnode **a_vpp; 613 struct componentname *a_cnp; 614 } */ *ap = v; 615 struct vnode *dvp = ap->a_dvp; 616 struct vnode **vpp = ap->a_vpp; 617 struct componentname *cnp = ap->a_cnp; 618 struct nilfs_node *dir_node, *res_node; 619 struct nilfs_mount *ump; 620 uint64_t ino; 621 const char *name; 622 int namelen, nameiop, islastcn, mounted_ro; 623 int vnodetp; 624 int error, found; 625 626 dir_node = VTOI(dvp); 627 ump = dir_node->ump; 628 *vpp = NULL; 629 630 DPRINTF(LOOKUP, ("nilfs_lookup called\n")); 631 632 /* simplify/clarification flags */ 633 nameiop = cnp->cn_nameiop; 634 islastcn = cnp->cn_flags & ISLASTCN; 635 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 636 637 /* check exec/dirread permissions first */ 638 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 639 if (error) 640 return error; 641 642 DPRINTF(LOOKUP, ("\taccess ok\n")); 643 644 /* 645 * If requesting a modify on the last path element on a read-only 646 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 647 */ 648 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 649 return EROFS; 650 651 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 652 cnp->cn_nameptr)); 653 /* look in the nami cache; returns 0 on success!! */ 654 error = cache_lookup(dvp, vpp, cnp); 655 if (error >= 0) 656 return error; 657 658 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 659 660 /* 661 * Obviously, the file is not (anymore) in the namecache, we have to 662 * search for it. There are three basic cases: '.', '..' and others. 663 * 664 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 665 */ 666 error = 0; 667 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 668 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 669 /* special case 1 '.' */ 670 vref(dvp); 671 *vpp = dvp; 672 /* done */ 673 } else if (cnp->cn_flags & ISDOTDOT) { 674 /* special case 2 '..' */ 675 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 676 677 /* get our node */ 678 name = ".."; 679 namelen = 2; 680 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 681 &ino, &found); 682 if (error) 683 goto out; 684 if (!found) 685 error = ENOENT; 686 687 /* first unlock parent */ 688 VOP_UNLOCK(dvp); 689 690 if (error == 0) { 691 DPRINTF(LOOKUP, ("\tfound '..'\n")); 692 /* try to create/reuse the node */ 693 error = nilfs_get_node(ump, ino, &res_node); 694 695 if (!error) { 696 DPRINTF(LOOKUP, 697 ("\tnode retrieved/created OK\n")); 698 *vpp = res_node->vnode; 699 } 700 } 701 702 /* try to relock parent */ 703 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 704 } else { 705 DPRINTF(LOOKUP, ("\tlookup file\n")); 706 /* all other files */ 707 /* lookup filename in the directory returning its inode */ 708 name = cnp->cn_nameptr; 709 namelen = cnp->cn_namelen; 710 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 711 &ino, &found); 712 if (error) 713 goto out; 714 if (!found) { 715 DPRINTF(LOOKUP, ("\tNOT found\n")); 716 /* 717 * UGH, didn't find name. If we're creating or 718 * renaming on the last name this is OK and we ought 719 * to return EJUSTRETURN if its allowed to be created. 720 */ 721 error = ENOENT; 722 if (islastcn && 723 (nameiop == CREATE || nameiop == RENAME)) 724 error = 0; 725 if (!error) { 726 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 727 if (!error) { 728 error = EJUSTRETURN; 729 } 730 } 731 /* done */ 732 } else { 733 /* try to create/reuse the node */ 734 error = nilfs_get_node(ump, ino, &res_node); 735 if (!error) { 736 /* 737 * If we are not at the last path component 738 * and found a non-directory or non-link entry 739 * (which may itself be pointing to a 740 * directory), raise an error. 741 */ 742 vnodetp = res_node->vnode->v_type; 743 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 744 if (!islastcn) 745 error = ENOTDIR; 746 } 747 748 } 749 if (!error) { 750 *vpp = res_node->vnode; 751 } 752 } 753 } 754 755 out: 756 /* 757 * Store result in the cache if requested. If we are creating a file, 758 * the file might not be found and thus putting it into the namecache 759 * might be seen as negative caching. 760 */ 761 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 762 cache_enter(dvp, *vpp, cnp); 763 764 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returing error %d\n", error)); 765 766 return error; 767 } 768 769 /* --------------------------------------------------------------------- */ 770 771 static void 772 nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 773 { 774 ts->tv_sec = ctime; 775 ts->tv_nsec = 0; 776 } 777 778 779 int 780 nilfs_getattr(void *v) 781 { 782 struct vop_getattr_args /* { 783 struct vnode *a_vp; 784 struct vattr *a_vap; 785 kauth_cred_t a_cred; 786 struct lwp *a_l; 787 } */ *ap = v; 788 struct vnode *vp = ap->a_vp; 789 struct vattr *vap = ap->a_vap; 790 struct nilfs_node *node = VTOI(vp); 791 struct nilfs_inode *inode = &node->inode; 792 793 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 794 795 /* basic info */ 796 vattr_null(vap); 797 vap->va_type = vp->v_type; 798 vap->va_mode = nilfs_rw16(inode->i_mode); /* XXX same? */ 799 vap->va_nlink = nilfs_rw16(inode->i_links_count); 800 vap->va_uid = nilfs_rw32(inode->i_uid); 801 vap->va_gid = nilfs_rw32(inode->i_gid); 802 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 803 vap->va_fileid = node->ino; 804 vap->va_size = nilfs_rw64(inode->i_size); 805 vap->va_blocksize = node->nilfsdev->blocksize; 806 807 /* times */ 808 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 809 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 810 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 811 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 812 813 vap->va_gen = nilfs_rw32(inode->i_generation); 814 vap->va_flags = 0; /* vattr flags */ 815 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 816 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 817 vap->va_vaflags = 0; /* XXX chflags flags */ 818 819 return 0; 820 } 821 822 /* --------------------------------------------------------------------- */ 823 824 #if 0 825 static int 826 nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 827 kauth_cred_t cred) 828 { 829 return EINVAL; 830 } 831 832 833 static int 834 nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 835 { 836 837 return EINVAL; 838 } 839 840 841 /* exported */ 842 int 843 nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 844 { 845 return EINVAL; 846 } 847 848 849 static int 850 nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 851 { 852 return EINVAL; 853 } 854 855 856 static int 857 nilfs_chtimes(struct vnode *vp, 858 struct timespec *atime, struct timespec *mtime, 859 struct timespec *birthtime, int setattrflags, 860 kauth_cred_t cred) 861 { 862 return EINVAL; 863 } 864 #endif 865 866 867 int 868 nilfs_setattr(void *v) 869 { 870 struct vop_setattr_args /* { 871 struct vnode *a_vp; 872 struct vattr *a_vap; 873 kauth_cred_t a_cred; 874 struct lwp *a_l; 875 } */ *ap = v; 876 struct vnode *vp = ap->a_vp; 877 878 vp = vp; 879 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 880 return EINVAL; 881 } 882 883 /* --------------------------------------------------------------------- */ 884 885 /* 886 * Return POSIX pathconf information for NILFS file systems. 887 */ 888 int 889 nilfs_pathconf(void *v) 890 { 891 struct vop_pathconf_args /* { 892 struct vnode *a_vp; 893 int a_name; 894 register_t *a_retval; 895 } */ *ap = v; 896 uint32_t bits; 897 898 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 899 900 switch (ap->a_name) { 901 case _PC_LINK_MAX: 902 *ap->a_retval = (1<<16)-1; /* 16 bits */ 903 return 0; 904 case _PC_NAME_MAX: 905 *ap->a_retval = NAME_MAX; 906 return 0; 907 case _PC_PATH_MAX: 908 *ap->a_retval = PATH_MAX; 909 return 0; 910 case _PC_PIPE_BUF: 911 *ap->a_retval = PIPE_BUF; 912 return 0; 913 case _PC_CHOWN_RESTRICTED: 914 *ap->a_retval = 1; 915 return 0; 916 case _PC_NO_TRUNC: 917 *ap->a_retval = 1; 918 return 0; 919 case _PC_SYNC_IO: 920 *ap->a_retval = 0; /* synchronised is off for performance */ 921 return 0; 922 case _PC_FILESIZEBITS: 923 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 924 bits = 64; /* XXX ought to deliver 65 */ 925 #if 0 926 if (nilfs_node) 927 bits = 64 * vp->v_mount->mnt_dev_bshift; 928 #endif 929 *ap->a_retval = bits; 930 return 0; 931 } 932 933 return EINVAL; 934 } 935 936 937 /* --------------------------------------------------------------------- */ 938 939 int 940 nilfs_open(void *v) 941 { 942 struct vop_open_args /* { 943 struct vnode *a_vp; 944 int a_mode; 945 kauth_cred_t a_cred; 946 struct proc *a_p; 947 } */ *ap = v; 948 int flags; 949 950 DPRINTF(VFSCALL, ("nilfs_open called\n")); 951 952 /* 953 * Files marked append-only must be opened for appending. 954 */ 955 flags = 0; 956 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 957 return (EPERM); 958 959 return 0; 960 } 961 962 963 /* --------------------------------------------------------------------- */ 964 965 int 966 nilfs_close(void *v) 967 { 968 struct vop_close_args /* { 969 struct vnode *a_vp; 970 int a_fflag; 971 kauth_cred_t a_cred; 972 struct proc *a_p; 973 } */ *ap = v; 974 struct vnode *vp = ap->a_vp; 975 struct nilfs_node *nilfs_node = VTOI(vp); 976 977 DPRINTF(VFSCALL, ("nilfs_close called\n")); 978 nilfs_node = nilfs_node; /* shut up gcc */ 979 980 mutex_enter(vp->v_interlock); 981 if (vp->v_usecount > 1) 982 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 983 mutex_exit(vp->v_interlock); 984 985 return 0; 986 } 987 988 989 /* --------------------------------------------------------------------- */ 990 991 static int 992 nilfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 993 { 994 int flags; 995 996 /* check if we are allowed to write */ 997 switch (vap->va_type) { 998 case VDIR: 999 case VLNK: 1000 case VREG: 1001 /* 1002 * normal nodes: check if we're on a read-only mounted 1003 * filingsystem and bomb out if we're trying to write. 1004 */ 1005 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1006 return EROFS; 1007 break; 1008 case VBLK: 1009 case VCHR: 1010 case VSOCK: 1011 case VFIFO: 1012 /* 1013 * special nodes: even on read-only mounted filingsystems 1014 * these are allowed to be written to if permissions allow. 1015 */ 1016 break; 1017 default: 1018 /* no idea what this is */ 1019 return EINVAL; 1020 } 1021 1022 /* noone may write immutable files */ 1023 /* TODO: get chflags(2) flags */ 1024 flags = 0; 1025 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1026 return EPERM; 1027 1028 return 0; 1029 } 1030 1031 static int 1032 nilfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1033 kauth_cred_t cred) 1034 { 1035 1036 /* ask the generic genfs_can_access to advice on security */ 1037 return genfs_can_access(vp->v_type, 1038 vap->va_mode, vap->va_uid, vap->va_gid, 1039 mode, cred); 1040 } 1041 1042 int 1043 nilfs_access(void *v) 1044 { 1045 struct vop_access_args /* { 1046 struct vnode *a_vp; 1047 int a_mode; 1048 kauth_cred_t a_cred; 1049 struct proc *a_p; 1050 } */ *ap = v; 1051 struct vnode *vp = ap->a_vp; 1052 mode_t mode = ap->a_mode; 1053 kauth_cred_t cred = ap->a_cred; 1054 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1055 struct vattr vap; 1056 int error; 1057 1058 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1059 1060 error = VOP_GETATTR(vp, &vap, NULL); 1061 if (error) 1062 return error; 1063 1064 error = nilfs_check_possible(vp, &vap, mode); 1065 if (error) 1066 return error; 1067 1068 error = nilfs_check_permitted(vp, &vap, mode, cred); 1069 1070 return error; 1071 } 1072 1073 /* --------------------------------------------------------------------- */ 1074 1075 int 1076 nilfs_create(void *v) 1077 { 1078 struct vop_create_args /* { 1079 struct vnode *a_dvp; 1080 struct vnode **a_vpp; 1081 struct componentname *a_cnp; 1082 struct vattr *a_vap; 1083 } */ *ap = v; 1084 struct vnode *dvp = ap->a_dvp; 1085 struct vnode **vpp = ap->a_vpp; 1086 struct vattr *vap = ap->a_vap; 1087 struct componentname *cnp = ap->a_cnp; 1088 int error; 1089 1090 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1091 error = nilfs_create_node(dvp, vpp, vap, cnp); 1092 1093 vput(dvp); 1094 return error; 1095 } 1096 1097 /* --------------------------------------------------------------------- */ 1098 1099 int 1100 nilfs_mknod(void *v) 1101 { 1102 struct vop_mknod_args /* { 1103 struct vnode *a_dvp; 1104 struct vnode **a_vpp; 1105 struct componentname *a_cnp; 1106 struct vattr *a_vap; 1107 } */ *ap = v; 1108 struct vnode *dvp = ap->a_dvp; 1109 struct vnode **vpp = ap->a_vpp; 1110 struct vattr *vap = ap->a_vap; 1111 struct componentname *cnp = ap->a_cnp; 1112 int error; 1113 1114 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1115 error = nilfs_create_node(dvp, vpp, vap, cnp); 1116 1117 vput(dvp); 1118 return error; 1119 } 1120 1121 /* --------------------------------------------------------------------- */ 1122 1123 int 1124 nilfs_mkdir(void *v) 1125 { 1126 struct vop_mkdir_args /* { 1127 struct vnode *a_dvp; 1128 struct vnode **a_vpp; 1129 struct componentname *a_cnp; 1130 struct vattr *a_vap; 1131 } */ *ap = v; 1132 struct vnode *dvp = ap->a_dvp; 1133 struct vnode **vpp = ap->a_vpp; 1134 struct vattr *vap = ap->a_vap; 1135 struct componentname *cnp = ap->a_cnp; 1136 int error; 1137 1138 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1139 error = nilfs_create_node(dvp, vpp, vap, cnp); 1140 1141 vput(dvp); 1142 return error; 1143 } 1144 1145 /* --------------------------------------------------------------------- */ 1146 1147 static int 1148 nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1149 { 1150 struct nilfs_node *nilfs_node, *dir_node; 1151 struct vattr vap; 1152 int error; 1153 1154 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1155 KASSERT(dvp != vp); 1156 KASSERT(vp->v_type != VDIR); 1157 KASSERT(dvp->v_mount == vp->v_mount); 1158 1159 /* lock node */ 1160 error = vn_lock(vp, LK_EXCLUSIVE); 1161 if (error) 1162 return error; 1163 1164 /* get attributes */ 1165 dir_node = VTOI(dvp); 1166 nilfs_node = VTOI(vp); 1167 1168 error = VOP_GETATTR(vp, &vap, FSCRED); 1169 if (error) { 1170 VOP_UNLOCK(vp); 1171 return error; 1172 } 1173 1174 /* check link count overflow */ 1175 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1176 VOP_UNLOCK(vp); 1177 return EMLINK; 1178 } 1179 1180 error = nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, 1181 &vap, cnp); 1182 if (error) 1183 VOP_UNLOCK(vp); 1184 return error; 1185 } 1186 1187 int 1188 nilfs_link(void *v) 1189 { 1190 struct vop_link_args /* { 1191 struct vnode *a_dvp; 1192 struct vnode *a_vp; 1193 struct componentname *a_cnp; 1194 } */ *ap = v; 1195 struct vnode *dvp = ap->a_dvp; 1196 struct vnode *vp = ap->a_vp; 1197 struct componentname *cnp = ap->a_cnp; 1198 int error; 1199 1200 error = nilfs_do_link(dvp, vp, cnp); 1201 if (error) 1202 VOP_ABORTOP(dvp, cnp); 1203 1204 VN_KNOTE(vp, NOTE_LINK); 1205 VN_KNOTE(dvp, NOTE_WRITE); 1206 vput(dvp); 1207 1208 return error; 1209 } 1210 1211 /* --------------------------------------------------------------------- */ 1212 1213 static int 1214 nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1215 { 1216 return EROFS; 1217 } 1218 1219 1220 int 1221 nilfs_symlink(void *v) 1222 { 1223 struct vop_symlink_args /* { 1224 struct vnode *a_dvp; 1225 struct vnode **a_vpp; 1226 struct componentname *a_cnp; 1227 struct vattr *a_vap; 1228 char *a_target; 1229 } */ *ap = v; 1230 struct vnode *dvp = ap->a_dvp; 1231 struct vnode **vpp = ap->a_vpp; 1232 struct vattr *vap = ap->a_vap; 1233 struct componentname *cnp = ap->a_cnp; 1234 struct nilfs_node *dir_node; 1235 struct nilfs_node *nilfs_node; 1236 int error; 1237 1238 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1239 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1240 error = nilfs_create_node(dvp, vpp, vap, cnp); 1241 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1242 if (!error) { 1243 dir_node = VTOI(dvp); 1244 nilfs_node = VTOI(*vpp); 1245 KASSERT(nilfs_node); 1246 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1247 if (error) { 1248 /* remove node */ 1249 nilfs_shrink_node(nilfs_node, 0); 1250 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1251 } 1252 } 1253 vput(dvp); 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 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1334 KASSERT(error == 0); 1335 1336 /* check when to delete the old already existing entry */ 1337 if (tvp) { 1338 /* get info about the node to be moved to */ 1339 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1340 KASSERT(error == 0); 1341 1342 /* if both dirs, make sure the destination is empty */ 1343 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1344 if (tvap.va_nlink > 2) { 1345 error = ENOTEMPTY; 1346 goto out; 1347 } 1348 } 1349 /* if moving dir, make sure destination is dir too */ 1350 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1351 error = ENOTDIR; 1352 goto out; 1353 } 1354 /* if we're moving a non-directory, make sure dest is no dir */ 1355 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1356 error = EISDIR; 1357 goto out; 1358 } 1359 } 1360 1361 /* dont allow renaming directories acros directory for now */ 1362 if (fdnode != tdnode) { 1363 if (fvp->v_type == VDIR) { 1364 error = EINVAL; 1365 goto out; 1366 } 1367 } 1368 1369 /* remove existing entry if present */ 1370 if (tvp) 1371 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1372 1373 /* create new directory entry for the node */ 1374 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1375 if (error) 1376 goto out; 1377 1378 /* unlink old directory entry for the node, if failing, unattach new */ 1379 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1380 if (error) 1381 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1382 1383 out: 1384 if (fdnode != tdnode) 1385 VOP_UNLOCK(fdvp); 1386 1387 out_unlocked: 1388 VOP_ABORTOP(tdvp, tcnp); 1389 if (tdvp == tvp) 1390 vrele(tdvp); 1391 else 1392 vput(tdvp); 1393 if (tvp) 1394 vput(tvp); 1395 VOP_ABORTOP(fdvp, fcnp); 1396 1397 /* release source nodes. */ 1398 vrele(fdvp); 1399 vrele(fvp); 1400 1401 return error; 1402 } 1403 1404 /* --------------------------------------------------------------------- */ 1405 1406 int 1407 nilfs_remove(void *v) 1408 { 1409 struct vop_remove_args /* { 1410 struct vnode *a_dvp; 1411 struct vnode *a_vp; 1412 struct componentname *a_cnp; 1413 } */ *ap = v; 1414 struct vnode *dvp = ap->a_dvp; 1415 struct vnode *vp = ap->a_vp; 1416 struct componentname *cnp = ap->a_cnp; 1417 struct nilfs_node *dir_node = VTOI(dvp); 1418 struct nilfs_node *nilfs_node = VTOI(vp); 1419 struct nilfs_mount *ump = dir_node->ump; 1420 int error; 1421 1422 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1423 if (vp->v_type != VDIR) { 1424 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1425 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1426 } else { 1427 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1428 error = EPERM; 1429 } 1430 1431 if (error == 0) { 1432 VN_KNOTE(vp, NOTE_DELETE); 1433 VN_KNOTE(dvp, NOTE_WRITE); 1434 } 1435 1436 if (dvp == vp) 1437 vrele(vp); 1438 else 1439 vput(vp); 1440 vput(dvp); 1441 1442 return error; 1443 } 1444 1445 /* --------------------------------------------------------------------- */ 1446 1447 int 1448 nilfs_rmdir(void *v) 1449 { 1450 struct vop_rmdir_args /* { 1451 struct vnode *a_dvp; 1452 struct vnode *a_vp; 1453 struct componentname *a_cnp; 1454 } */ *ap = v; 1455 struct vnode *vp = ap->a_vp; 1456 struct vnode *dvp = ap->a_dvp; 1457 struct componentname *cnp = ap->a_cnp; 1458 struct nilfs_node *dir_node = VTOI(dvp); 1459 struct nilfs_node *nilfs_node = VTOI(vp); 1460 struct nilfs_mount *ump = dir_node->ump; 1461 int refcnt, error; 1462 1463 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1464 1465 /* don't allow '.' to be deleted */ 1466 if (dir_node == nilfs_node) { 1467 vrele(dvp); 1468 vput(vp); 1469 return EINVAL; 1470 } 1471 1472 /* check to see if the directory is empty */ 1473 error = 0; 1474 refcnt = 2; /* XXX */ 1475 if (refcnt > 1) { 1476 /* NOT empty */ 1477 vput(dvp); 1478 vput(vp); 1479 return ENOTEMPTY; 1480 } 1481 1482 /* detach the node from the directory */ 1483 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1484 if (error == 0) { 1485 cache_purge(vp); 1486 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1487 VN_KNOTE(vp, NOTE_DELETE); 1488 } 1489 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1490 1491 /* unput the nodes and exit */ 1492 vput(dvp); 1493 vput(vp); 1494 1495 return error; 1496 } 1497 1498 /* --------------------------------------------------------------------- */ 1499 1500 int 1501 nilfs_fsync(void *v) 1502 { 1503 struct vop_fsync_args /* { 1504 struct vnode *a_vp; 1505 kauth_cred_t a_cred; 1506 int a_flags; 1507 off_t offlo; 1508 off_t offhi; 1509 struct proc *a_p; 1510 } */ *ap = v; 1511 struct vnode *vp = ap->a_vp; 1512 // struct nilfs_node *nilfs_node = VTOI(vp); 1513 // int error, flags, wait; 1514 1515 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1516 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1517 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1518 1519 vp = vp; 1520 return 0; 1521 } 1522 1523 /* --------------------------------------------------------------------- */ 1524 1525 int 1526 nilfs_advlock(void *v) 1527 { 1528 struct vop_advlock_args /* { 1529 struct vnode *a_vp; 1530 void *a_id; 1531 int a_op; 1532 struct flock *a_fl; 1533 int a_flags; 1534 } */ *ap = v; 1535 struct vnode *vp = ap->a_vp; 1536 struct nilfs_node *nilfs_node = VTOI(vp); 1537 uint64_t file_size; 1538 1539 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1540 1541 assert(nilfs_node); 1542 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1543 1544 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1545 } 1546 1547 /* --------------------------------------------------------------------- */ 1548 1549 1550 /* Global vfs vnode data structures for nilfss */ 1551 int (**nilfs_vnodeop_p) __P((void *)); 1552 1553 const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1554 { &vop_default_desc, vn_default_error }, 1555 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1556 { &vop_create_desc, nilfs_create }, /* create */ 1557 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1558 { &vop_open_desc, nilfs_open }, /* open */ 1559 { &vop_close_desc, nilfs_close }, /* close */ 1560 { &vop_access_desc, nilfs_access }, /* access */ 1561 { &vop_getattr_desc, nilfs_getattr }, /* getattr */ 1562 { &vop_setattr_desc, nilfs_setattr }, /* setattr */ /* TODO chflags */ 1563 { &vop_read_desc, nilfs_read }, /* read */ 1564 { &vop_write_desc, nilfs_write }, /* write */ /* WRITE */ 1565 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1566 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1567 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1568 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1569 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1570 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1571 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1572 { &vop_seek_desc, genfs_seek }, /* seek */ 1573 { &vop_remove_desc, nilfs_remove }, /* remove */ 1574 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1575 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1576 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1577 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1578 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1579 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1580 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1581 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1582 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1583 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1584 { &vop_lock_desc, genfs_lock }, /* lock */ 1585 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1586 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1587 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1588 /* { &vop_print_desc, nilfs_print }, */ /* print */ 1589 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1590 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1591 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1592 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1593 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1594 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1595 { NULL, NULL } 1596 }; 1597 1598 1599 const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1600 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1601 }; 1602 1603