1 /* $NetBSD: nilfs_vnops.c,v 1.4 2010/01/08 11:35:08 pooka 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 1.4 2010/01/08 11:35:08 pooka 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, 0); 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, 0); 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 /* purge old data from namei */ 122 cache_purge(vp); 123 124 /* dispose all node knowledge */ 125 nilfs_dispose_node(&nilfs_node); 126 127 return 0; 128 } 129 130 /* --------------------------------------------------------------------- */ 131 132 int 133 nilfs_read(void *v) 134 { 135 struct vop_read_args /* { 136 struct vnode *a_vp; 137 struct uio *a_uio; 138 int a_ioflag; 139 kauth_cred_t a_cred; 140 } */ *ap = v; 141 struct vnode *vp = ap->a_vp; 142 struct uio *uio = ap->a_uio; 143 int ioflag = ap->a_ioflag; 144 int advice = IO_ADV_DECODE(ap->a_ioflag); 145 struct uvm_object *uobj; 146 struct nilfs_node *nilfs_node = VTOI(vp); 147 uint64_t file_size; 148 vsize_t len; 149 int error; 150 int flags; 151 152 DPRINTF(READ, ("nilfs_read called\n")); 153 154 /* can this happen? some filingsystems have this check */ 155 if (uio->uio_offset < 0) 156 return EINVAL; 157 if (uio->uio_resid == 0) 158 return 0; 159 160 /* protect against rogue programs reading raw directories and links */ 161 if ((ioflag & IO_ALTSEMANTICS) == 0) { 162 if (vp->v_type == VDIR) 163 return EISDIR; 164 /* all but regular files just give EINVAL */ 165 if (vp->v_type != VREG) 166 return EINVAL; 167 } 168 169 assert(nilfs_node); 170 file_size = nilfs_rw64(nilfs_node->inode.i_size); 171 172 /* read contents using buffercache */ 173 uobj = &vp->v_uobj; 174 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 175 error = 0; 176 while (uio->uio_resid > 0) { 177 /* reached end? */ 178 if (file_size <= uio->uio_offset) 179 break; 180 181 /* maximise length to file extremity */ 182 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 183 if (len == 0) 184 break; 185 186 /* ubc, here we come, prepare to trap */ 187 error = ubc_uiomove(uobj, uio, len, advice, 188 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 189 if (error) 190 break; 191 } 192 193 /* note access time unless not requested */ 194 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 195 nilfs_node->i_flags |= IN_ACCESS; 196 if ((ioflag & IO_SYNC) == IO_SYNC) 197 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 198 } 199 200 return error; 201 } 202 203 /* --------------------------------------------------------------------- */ 204 205 int 206 nilfs_write(void *v) 207 { 208 struct vop_write_args /* { 209 struct vnode *a_vp; 210 struct uio *a_uio; 211 int a_ioflag; 212 kauth_cred_t a_cred; 213 } */ *ap = v; 214 struct vnode *vp = ap->a_vp; 215 struct uio *uio = ap->a_uio; 216 int ioflag = ap->a_ioflag; 217 int advice = IO_ADV_DECODE(ap->a_ioflag); 218 struct uvm_object *uobj; 219 struct nilfs_node *nilfs_node = VTOI(vp); 220 uint64_t file_size, old_size; 221 vsize_t len; 222 int error; 223 int flags, 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 return EIO; 245 246 /* remember old file size */ 247 assert(nilfs_node); 248 file_size = nilfs_rw64(nilfs_node->inode.i_size); 249 old_size = file_size; 250 251 /* if explicitly asked to append, uio_offset can be wrong? */ 252 if (ioflag & IO_APPEND) 253 uio->uio_offset = file_size; 254 255 #if 0 256 extended = (uio->uio_offset + uio->uio_resid > file_size); 257 if (extended) { 258 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 259 file_size, uio->uio_offset + uio->uio_resid)); 260 error = nilfs_grow_node(nilfs_node, uio->uio_offset + uio->uio_resid); 261 if (error) 262 return error; 263 file_size = uio->uio_offset + uio->uio_resid; 264 } 265 #endif 266 267 /* write contents using buffercache */ 268 uobj = &vp->v_uobj; 269 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 270 resid = uio->uio_resid; 271 error = 0; 272 273 uvm_vnp_setwritesize(vp, file_size); 274 while (uio->uio_resid > 0) { 275 /* maximise length to file extremity */ 276 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 277 if (len == 0) 278 break; 279 280 /* ubc, here we come, prepare to trap */ 281 error = ubc_uiomove(uobj, uio, len, advice, 282 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 283 if (error) 284 break; 285 } 286 uvm_vnp_setsize(vp, file_size); 287 288 /* mark node changed and request update */ 289 nilfs_node->i_flags |= IN_CHANGE | IN_UPDATE; 290 291 /* 292 * XXX TODO FFS has code here to reset setuid & setgid when we're not 293 * the superuser as a precaution against tampering. 294 */ 295 296 /* if we wrote a thing, note write action on vnode */ 297 if (resid > uio->uio_resid) 298 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 299 300 if (error) { 301 /* bring back file size to its former size */ 302 /* take notice of its errors? */ 303 // (void) nilfs_chsize(vp, (u_quad_t) old_size, NOCRED); 304 305 /* roll back uio */ 306 uio->uio_offset -= resid - uio->uio_resid; 307 uio->uio_resid = resid; 308 } else { 309 /* if we write and we're synchronous, update node */ 310 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 311 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 312 } 313 314 return error; 315 } 316 317 318 /* --------------------------------------------------------------------- */ 319 320 /* 321 * `Special' bmap functionality that translates all incomming requests to 322 * translate to vop_strategy() calls with the same blocknumbers effectively 323 * not translating at all. 324 */ 325 326 int 327 nilfs_trivial_bmap(void *v) 328 { 329 struct vop_bmap_args /* { 330 struct vnode *a_vp; 331 daddr_t a_bn; 332 struct vnode **a_vpp; 333 daddr_t *a_bnp; 334 int *a_runp; 335 } */ *ap = v; 336 struct vnode *vp = ap->a_vp; /* our node */ 337 struct vnode **vpp = ap->a_vpp; /* return node */ 338 daddr_t *bnp = ap->a_bnp; /* translated */ 339 daddr_t bn = ap->a_bn; /* origional */ 340 int *runp = ap->a_runp; 341 struct nilfs_node *node = VTOI(vp); 342 uint32_t blocksize; 343 344 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 345 /* XXX could return `-1' to indicate holes/zero's */ 346 347 blocksize = node->nilfsdev->blocksize; 348 349 /* translate 1:1 */ 350 *bnp = bn; 351 if (vpp) 352 *vpp = vp; 353 354 /* set runlength to maximum */ 355 if (runp) 356 *runp = MAXPHYS / blocksize; 357 358 /* return success */ 359 return 0; 360 } 361 362 /* --------------------------------------------------------------------- */ 363 364 static void 365 nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 366 { 367 struct nilfs_device *nilfsdev = node->nilfsdev; 368 struct buf *nbp; 369 uint64_t *l2vmap, *v2pmap; 370 uint64_t from, blks; 371 uint32_t blocksize, buf_offset; 372 uint8_t *buf_pos; 373 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 374 int i, error; 375 376 /* 377 * Translate all the block sectors into a series of buffers to read 378 * asynchronously from the nilfs device. Note that this lookup may 379 * induce readin's too. 380 */ 381 382 blocksize = nilfsdev->blocksize; 383 384 from = bp->b_blkno; 385 blks = bp->b_bcount / blocksize; 386 387 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 388 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 389 390 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 391 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 392 393 /* get mapping memory */ 394 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 395 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 396 397 /* get virtual block numbers for the vnode's buffer span */ 398 error = nilfs_btree_nlookup(node, from, blks, l2vmap); 399 if (error) 400 goto out; 401 402 /* translate virtual block numbers to physical block numbers */ 403 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 404 if (error) 405 goto out; 406 407 /* issue translated blocks */ 408 bp->b_resid = bp->b_bcount; 409 for (i = 0; i < blks; i++) { 410 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 411 "%"PRIu64" -> %"PRIu64"\n", 412 node->ino, i, l2vmap[i], v2pmap[i])); 413 414 buf_offset = i * blocksize; 415 buf_pos = (uint8_t *) bp->b_data + buf_offset; 416 417 /* note virtual block 0 marks not mapped */ 418 if (l2vmap[i] == 0) { 419 memset(buf_pos, 0, blocksize); 420 nestiobuf_done(bp, blocksize, 0); 421 continue; 422 } 423 424 /* nest iobuf */ 425 nbp = getiobuf(NULL, true); 426 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 427 KASSERT(nbp->b_vp == node->vnode); 428 /* nbp is B_ASYNC */ 429 430 nbp->b_lblkno = i; 431 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 432 nbp->b_rawblkno = nbp->b_blkno; 433 434 VOP_STRATEGY(nilfsdev->devvp, nbp); 435 } 436 437 if ((bp->b_flags & B_ASYNC) == 0) 438 biowait(bp); 439 440 out: 441 free(l2vmap, M_TEMP); 442 free(v2pmap, M_TEMP); 443 if (error) { 444 bp->b_error = EIO; 445 biodone(bp); 446 } 447 } 448 449 450 static void 451 nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 452 { 453 /* TODO pass on to segment collector */ 454 panic("nilfs_strategy writing called\n"); 455 } 456 457 458 int 459 nilfs_vfsstrategy(void *v) 460 { 461 struct vop_strategy_args /* { 462 struct vnode *a_vp; 463 struct buf *a_bp; 464 } */ *ap = v; 465 struct vnode *vp = ap->a_vp; 466 struct buf *bp = ap->a_bp; 467 struct nilfs_node *node = VTOI(vp); 468 469 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 470 471 /* check if we ought to be here */ 472 if (vp->v_type == VBLK || vp->v_type == VCHR) 473 panic("nilfs_strategy: spec"); 474 475 /* translate if needed and pass on */ 476 if (bp->b_flags & B_READ) { 477 nilfs_read_filebuf(node, bp); 478 return bp->b_error; 479 } 480 481 /* send to segment collector */ 482 nilfs_write_filebuf(node, bp); 483 return bp->b_error; 484 } 485 486 /* --------------------------------------------------------------------- */ 487 488 int 489 nilfs_readdir(void *v) 490 { 491 struct vop_readdir_args /* { 492 struct vnode *a_vp; 493 struct uio *a_uio; 494 kauth_cred_t a_cred; 495 int *a_eofflag; 496 off_t **a_cookies; 497 int *a_ncookies; 498 } */ *ap = v; 499 struct uio *uio = ap->a_uio; 500 struct vnode *vp = ap->a_vp; 501 struct nilfs_node *node = VTOI(vp); 502 struct nilfs_dir_entry *ndirent; 503 struct dirent dirent; 504 struct buf *bp; 505 uint64_t file_size, diroffset, transoffset, blkoff; 506 uint64_t blocknr; 507 uint32_t blocksize = node->nilfsdev->blocksize; 508 uint8_t *pos, name_len; 509 int error; 510 511 DPRINTF(READDIR, ("nilfs_readdir called\n")); 512 513 if (vp->v_type != VDIR) 514 return ENOTDIR; 515 516 file_size = nilfs_rw64(node->inode.i_size); 517 518 /* we are called just as long as we keep on pushing data in */ 519 error = 0; 520 if ((uio->uio_offset < file_size) && 521 (uio->uio_resid >= sizeof(struct dirent))) { 522 diroffset = uio->uio_offset; 523 transoffset = diroffset; 524 525 blocknr = diroffset / blocksize; 526 blkoff = diroffset % blocksize; 527 error = nilfs_bread(node, blocknr, NOCRED, 0, &bp); 528 if (error) 529 return EIO; 530 while (diroffset < file_size) { 531 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 532 diroffset)); 533 if (blkoff >= blocksize) { 534 blkoff = 0; blocknr++; 535 brelse(bp, BC_AGE); 536 error = nilfs_bread(node, blocknr, NOCRED, 0, 537 &bp); 538 if (error) 539 return EIO; 540 } 541 542 /* read in one dirent */ 543 pos = (uint8_t *) bp->b_data + blkoff; 544 ndirent = (struct nilfs_dir_entry *) pos; 545 546 name_len = ndirent->name_len; 547 memset(&dirent, 0, sizeof(struct dirent)); 548 dirent.d_fileno = nilfs_rw64(ndirent->inode); 549 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 550 dirent.d_namlen = name_len; 551 strncpy(dirent.d_name, ndirent->name, name_len); 552 dirent.d_reclen = _DIRENT_SIZE(&dirent); 553 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 554 name_len, dirent.d_name)); 555 556 /* 557 * If there isn't enough space in the uio to return a 558 * whole dirent, break off read 559 */ 560 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 561 break; 562 563 /* transfer */ 564 if (name_len) 565 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 566 567 /* advance */ 568 diroffset += nilfs_rw16(ndirent->rec_len); 569 blkoff += nilfs_rw16(ndirent->rec_len); 570 571 /* remember the last entry we transfered */ 572 transoffset = diroffset; 573 } 574 brelse(bp, BC_AGE); 575 576 /* pass on last transfered offset */ 577 uio->uio_offset = transoffset; 578 } 579 580 if (ap->a_eofflag) 581 *ap->a_eofflag = (uio->uio_offset >= file_size); 582 583 return error; 584 } 585 586 /* --------------------------------------------------------------------- */ 587 588 int 589 nilfs_lookup(void *v) 590 { 591 struct vop_lookup_args /* { 592 struct vnode *a_dvp; 593 struct vnode **a_vpp; 594 struct componentname *a_cnp; 595 } */ *ap = v; 596 struct vnode *dvp = ap->a_dvp; 597 struct vnode **vpp = ap->a_vpp; 598 struct componentname *cnp = ap->a_cnp; 599 struct nilfs_node *dir_node, *res_node; 600 struct nilfs_mount *ump; 601 uint64_t ino; 602 const char *name; 603 int namelen, nameiop, islastcn, mounted_ro; 604 int vnodetp; 605 int error, found; 606 607 dir_node = VTOI(dvp); 608 ump = dir_node->ump; 609 *vpp = NULL; 610 611 DPRINTF(LOOKUP, ("nilfs_lookup called\n")); 612 613 /* simplify/clarification flags */ 614 nameiop = cnp->cn_nameiop; 615 islastcn = cnp->cn_flags & ISLASTCN; 616 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 617 618 /* check exec/dirread permissions first */ 619 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 620 if (error) 621 return error; 622 623 DPRINTF(LOOKUP, ("\taccess ok\n")); 624 625 /* 626 * If requesting a modify on the last path element on a read-only 627 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 628 */ 629 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 630 return EROFS; 631 632 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 633 cnp->cn_nameptr)); 634 /* look in the nami cache; returns 0 on success!! */ 635 error = cache_lookup(dvp, vpp, cnp); 636 if (error >= 0) 637 return error; 638 639 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 640 641 /* 642 * Obviously, the file is not (anymore) in the namecache, we have to 643 * search for it. There are three basic cases: '.', '..' and others. 644 * 645 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 646 */ 647 error = 0; 648 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 649 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 650 /* special case 1 '.' */ 651 vref(dvp); 652 *vpp = dvp; 653 /* done */ 654 } else if (cnp->cn_flags & ISDOTDOT) { 655 /* special case 2 '..' */ 656 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 657 658 /* get our node */ 659 name = ".."; 660 namelen = 2; 661 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 662 &ino, &found); 663 if (error) 664 goto out; 665 if (!found) 666 error = ENOENT; 667 668 /* first unlock parent */ 669 VOP_UNLOCK(dvp, 0); 670 671 if (error == 0) { 672 DPRINTF(LOOKUP, ("\tfound '..'\n")); 673 /* try to create/reuse the node */ 674 error = nilfs_get_node(ump, ino, &res_node); 675 676 if (!error) { 677 DPRINTF(LOOKUP, 678 ("\tnode retrieved/created OK\n")); 679 *vpp = res_node->vnode; 680 } 681 } 682 683 /* try to relock parent */ 684 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 685 } else { 686 DPRINTF(LOOKUP, ("\tlookup file\n")); 687 /* all other files */ 688 /* lookup filename in the directory returning its inode */ 689 name = cnp->cn_nameptr; 690 namelen = cnp->cn_namelen; 691 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 692 &ino, &found); 693 if (error) 694 goto out; 695 if (!found) { 696 DPRINTF(LOOKUP, ("\tNOT found\n")); 697 /* 698 * UGH, didn't find name. If we're creating or 699 * renaming on the last name this is OK and we ought 700 * to return EJUSTRETURN if its allowed to be created. 701 */ 702 error = ENOENT; 703 if (islastcn && 704 (nameiop == CREATE || nameiop == RENAME)) 705 error = 0; 706 if (!error) { 707 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 708 if (!error) { 709 /* keep the component name */ 710 cnp->cn_flags |= SAVENAME; 711 error = EJUSTRETURN; 712 } 713 } 714 /* done */ 715 } else { 716 /* try to create/reuse the node */ 717 error = nilfs_get_node(ump, ino, &res_node); 718 if (!error) { 719 /* 720 * If we are not at the last path component 721 * and found a non-directory or non-link entry 722 * (which may itself be pointing to a 723 * directory), raise an error. 724 */ 725 vnodetp = res_node->vnode->v_type; 726 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 727 if (!islastcn) 728 error = ENOTDIR; 729 } 730 731 } 732 if (!error) { 733 *vpp = res_node->vnode; 734 } 735 } 736 } 737 738 out: 739 /* 740 * Store result in the cache if requested. If we are creating a file, 741 * the file might not be found and thus putting it into the namecache 742 * might be seen as negative caching. 743 */ 744 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 745 cache_enter(dvp, *vpp, cnp); 746 747 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returing error %d\n", error)); 748 749 return error; 750 } 751 752 /* --------------------------------------------------------------------- */ 753 754 static void 755 nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 756 { 757 ts->tv_sec = ctime; 758 ts->tv_nsec = 0; 759 } 760 761 762 int 763 nilfs_getattr(void *v) 764 { 765 struct vop_getattr_args /* { 766 struct vnode *a_vp; 767 struct vattr *a_vap; 768 kauth_cred_t a_cred; 769 struct lwp *a_l; 770 } */ *ap = v; 771 struct vnode *vp = ap->a_vp; 772 struct vattr *vap = ap->a_vap; 773 struct nilfs_node *node = VTOI(vp); 774 struct nilfs_inode *inode = &node->inode; 775 776 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 777 778 /* basic info */ 779 vattr_null(vap); 780 vap->va_type = vp->v_type; 781 vap->va_mode = nilfs_rw16(inode->i_mode); /* XXX same? */ 782 vap->va_nlink = nilfs_rw16(inode->i_links_count); 783 vap->va_uid = nilfs_rw32(inode->i_uid); 784 vap->va_gid = nilfs_rw32(inode->i_gid); 785 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 786 vap->va_fileid = node->ino; 787 vap->va_size = nilfs_rw64(inode->i_size); 788 vap->va_blocksize = node->nilfsdev->blocksize; 789 790 /* times */ 791 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 792 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 793 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 794 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 795 796 vap->va_gen = nilfs_rw32(inode->i_generation); 797 vap->va_flags = 0; /* vattr flags */ 798 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 799 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 800 vap->va_vaflags = 0; /* XXX chflags flags */ 801 802 return 0; 803 } 804 805 /* --------------------------------------------------------------------- */ 806 807 #if 0 808 static int 809 nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 810 kauth_cred_t cred) 811 { 812 return EINVAL; 813 } 814 815 816 static int 817 nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 818 { 819 820 return EINVAL; 821 } 822 823 824 /* exported */ 825 int 826 nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 827 { 828 return EINVAL; 829 } 830 831 832 static int 833 nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 834 { 835 return EINVAL; 836 } 837 838 839 static int 840 nilfs_chtimes(struct vnode *vp, 841 struct timespec *atime, struct timespec *mtime, 842 struct timespec *birthtime, int setattrflags, 843 kauth_cred_t cred) 844 { 845 return EINVAL; 846 } 847 #endif 848 849 850 int 851 nilfs_setattr(void *v) 852 { 853 struct vop_setattr_args /* { 854 struct vnode *a_vp; 855 struct vattr *a_vap; 856 kauth_cred_t a_cred; 857 struct lwp *a_l; 858 } */ *ap = v; 859 struct vnode *vp = ap->a_vp; 860 861 vp = vp; 862 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 863 return EINVAL; 864 } 865 866 /* --------------------------------------------------------------------- */ 867 868 /* 869 * Return POSIX pathconf information for NILFS file systems. 870 */ 871 int 872 nilfs_pathconf(void *v) 873 { 874 struct vop_pathconf_args /* { 875 struct vnode *a_vp; 876 int a_name; 877 register_t *a_retval; 878 } */ *ap = v; 879 uint32_t bits; 880 881 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 882 883 switch (ap->a_name) { 884 case _PC_LINK_MAX: 885 *ap->a_retval = (1<<16)-1; /* 16 bits */ 886 return 0; 887 case _PC_NAME_MAX: 888 *ap->a_retval = NAME_MAX; 889 return 0; 890 case _PC_PATH_MAX: 891 *ap->a_retval = PATH_MAX; 892 return 0; 893 case _PC_PIPE_BUF: 894 *ap->a_retval = PIPE_BUF; 895 return 0; 896 case _PC_CHOWN_RESTRICTED: 897 *ap->a_retval = 1; 898 return 0; 899 case _PC_NO_TRUNC: 900 *ap->a_retval = 1; 901 return 0; 902 case _PC_SYNC_IO: 903 *ap->a_retval = 0; /* synchronised is off for performance */ 904 return 0; 905 case _PC_FILESIZEBITS: 906 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 907 bits = 64; /* XXX ought to deliver 65 */ 908 #if 0 909 if (nilfs_node) 910 bits = 64 * vp->v_mount->mnt_dev_bshift; 911 #endif 912 *ap->a_retval = bits; 913 return 0; 914 } 915 916 return EINVAL; 917 } 918 919 920 /* --------------------------------------------------------------------- */ 921 922 int 923 nilfs_open(void *v) 924 { 925 struct vop_open_args /* { 926 struct vnode *a_vp; 927 int a_mode; 928 kauth_cred_t a_cred; 929 struct proc *a_p; 930 } */ *ap = v; 931 int flags; 932 933 DPRINTF(VFSCALL, ("nilfs_open called\n")); 934 935 /* 936 * Files marked append-only must be opened for appending. 937 */ 938 flags = 0; 939 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 940 return (EPERM); 941 942 return 0; 943 } 944 945 946 /* --------------------------------------------------------------------- */ 947 948 int 949 nilfs_close(void *v) 950 { 951 struct vop_close_args /* { 952 struct vnode *a_vp; 953 int a_fflag; 954 kauth_cred_t a_cred; 955 struct proc *a_p; 956 } */ *ap = v; 957 struct vnode *vp = ap->a_vp; 958 struct nilfs_node *nilfs_node = VTOI(vp); 959 960 DPRINTF(VFSCALL, ("nilfs_close called\n")); 961 nilfs_node = nilfs_node; /* shut up gcc */ 962 963 mutex_enter(&vp->v_interlock); 964 if (vp->v_usecount > 1) 965 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 966 mutex_exit(&vp->v_interlock); 967 968 return 0; 969 } 970 971 972 /* --------------------------------------------------------------------- */ 973 974 static int 975 nilfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 976 { 977 int flags; 978 979 /* check if we are allowed to write */ 980 switch (vap->va_type) { 981 case VDIR: 982 case VLNK: 983 case VREG: 984 /* 985 * normal nodes: check if we're on a read-only mounted 986 * filingsystem and bomb out if we're trying to write. 987 */ 988 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 989 return EROFS; 990 break; 991 case VBLK: 992 case VCHR: 993 case VSOCK: 994 case VFIFO: 995 /* 996 * special nodes: even on read-only mounted filingsystems 997 * these are allowed to be written to if permissions allow. 998 */ 999 break; 1000 default: 1001 /* no idea what this is */ 1002 return EINVAL; 1003 } 1004 1005 /* noone may write immutable files */ 1006 /* TODO: get chflags(2) flags */ 1007 flags = 0; 1008 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1009 return EPERM; 1010 1011 return 0; 1012 } 1013 1014 static int 1015 nilfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1016 kauth_cred_t cred) 1017 { 1018 1019 /* ask the generic genfs_can_access to advice on security */ 1020 return genfs_can_access(vp->v_type, 1021 vap->va_mode, vap->va_uid, vap->va_gid, 1022 mode, cred); 1023 } 1024 1025 int 1026 nilfs_access(void *v) 1027 { 1028 struct vop_access_args /* { 1029 struct vnode *a_vp; 1030 int a_mode; 1031 kauth_cred_t a_cred; 1032 struct proc *a_p; 1033 } */ *ap = v; 1034 struct vnode *vp = ap->a_vp; 1035 mode_t mode = ap->a_mode; 1036 kauth_cred_t cred = ap->a_cred; 1037 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1038 struct vattr vap; 1039 int error; 1040 1041 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1042 1043 error = VOP_GETATTR(vp, &vap, NULL); 1044 if (error) 1045 return error; 1046 1047 error = nilfs_check_possible(vp, &vap, mode); 1048 if (error) 1049 return error; 1050 1051 error = nilfs_check_permitted(vp, &vap, mode, cred); 1052 1053 return error; 1054 } 1055 1056 /* --------------------------------------------------------------------- */ 1057 1058 int 1059 nilfs_create(void *v) 1060 { 1061 struct vop_create_args /* { 1062 struct vnode *a_dvp; 1063 struct vnode **a_vpp; 1064 struct componentname *a_cnp; 1065 struct vattr *a_vap; 1066 } */ *ap = v; 1067 struct vnode *dvp = ap->a_dvp; 1068 struct vnode **vpp = ap->a_vpp; 1069 struct vattr *vap = ap->a_vap; 1070 struct componentname *cnp = ap->a_cnp; 1071 int error; 1072 1073 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1074 error = nilfs_create_node(dvp, vpp, vap, cnp); 1075 1076 if (error || !(cnp->cn_flags & SAVESTART)) 1077 PNBUF_PUT(cnp->cn_pnbuf); 1078 vput(dvp); 1079 return error; 1080 } 1081 1082 /* --------------------------------------------------------------------- */ 1083 1084 int 1085 nilfs_mknod(void *v) 1086 { 1087 struct vop_mknod_args /* { 1088 struct vnode *a_dvp; 1089 struct vnode **a_vpp; 1090 struct componentname *a_cnp; 1091 struct vattr *a_vap; 1092 } */ *ap = v; 1093 struct vnode *dvp = ap->a_dvp; 1094 struct vnode **vpp = ap->a_vpp; 1095 struct vattr *vap = ap->a_vap; 1096 struct componentname *cnp = ap->a_cnp; 1097 int error; 1098 1099 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1100 error = nilfs_create_node(dvp, vpp, vap, cnp); 1101 1102 if (error || !(cnp->cn_flags & SAVESTART)) 1103 PNBUF_PUT(cnp->cn_pnbuf); 1104 vput(dvp); 1105 return error; 1106 } 1107 1108 /* --------------------------------------------------------------------- */ 1109 1110 int 1111 nilfs_mkdir(void *v) 1112 { 1113 struct vop_mkdir_args /* { 1114 struct vnode *a_dvp; 1115 struct vnode **a_vpp; 1116 struct componentname *a_cnp; 1117 struct vattr *a_vap; 1118 } */ *ap = v; 1119 struct vnode *dvp = ap->a_dvp; 1120 struct vnode **vpp = ap->a_vpp; 1121 struct vattr *vap = ap->a_vap; 1122 struct componentname *cnp = ap->a_cnp; 1123 int error; 1124 1125 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1126 error = nilfs_create_node(dvp, vpp, vap, cnp); 1127 1128 if (error || !(cnp->cn_flags & SAVESTART)) 1129 PNBUF_PUT(cnp->cn_pnbuf); 1130 vput(dvp); 1131 return error; 1132 } 1133 1134 /* --------------------------------------------------------------------- */ 1135 1136 static int 1137 nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1138 { 1139 struct nilfs_node *nilfs_node, *dir_node; 1140 struct vattr vap; 1141 int error; 1142 1143 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1144 error = 0; 1145 1146 /* some quick checks */ 1147 if (vp->v_type == VDIR) 1148 return EPERM; /* can't link a directory */ 1149 if (dvp->v_mount != vp->v_mount) 1150 return EXDEV; /* can't link across devices */ 1151 if (dvp == vp) 1152 return EPERM; /* can't be the same */ 1153 1154 /* lock node */ 1155 error = vn_lock(vp, LK_EXCLUSIVE); 1156 if (error) 1157 return error; 1158 1159 /* get attributes */ 1160 dir_node = VTOI(dvp); 1161 nilfs_node = VTOI(vp); 1162 1163 error = VOP_GETATTR(vp, &vap, FSCRED); 1164 if (error) 1165 return error; 1166 1167 /* check link count overflow */ 1168 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1169 return EMLINK; 1170 1171 return nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, &vap, cnp); 1172 } 1173 1174 int 1175 nilfs_link(void *v) 1176 { 1177 struct vop_link_args /* { 1178 struct vnode *a_dvp; 1179 struct vnode *a_vp; 1180 struct componentname *a_cnp; 1181 } */ *ap = v; 1182 struct vnode *dvp = ap->a_dvp; 1183 struct vnode *vp = ap->a_vp; 1184 struct componentname *cnp = ap->a_cnp; 1185 int error; 1186 1187 error = nilfs_do_link(dvp, vp, cnp); 1188 if (error) 1189 VOP_ABORTOP(dvp, cnp); 1190 1191 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1192 VOP_UNLOCK(vp, 0); 1193 1194 VN_KNOTE(vp, NOTE_LINK); 1195 VN_KNOTE(dvp, NOTE_WRITE); 1196 vput(dvp); 1197 1198 return error; 1199 } 1200 1201 /* --------------------------------------------------------------------- */ 1202 1203 static int 1204 nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1205 { 1206 return EROFS; 1207 } 1208 1209 1210 int 1211 nilfs_symlink(void *v) 1212 { 1213 struct vop_symlink_args /* { 1214 struct vnode *a_dvp; 1215 struct vnode **a_vpp; 1216 struct componentname *a_cnp; 1217 struct vattr *a_vap; 1218 char *a_target; 1219 } */ *ap = v; 1220 struct vnode *dvp = ap->a_dvp; 1221 struct vnode **vpp = ap->a_vpp; 1222 struct vattr *vap = ap->a_vap; 1223 struct componentname *cnp = ap->a_cnp; 1224 struct nilfs_node *dir_node; 1225 struct nilfs_node *nilfs_node; 1226 int error; 1227 1228 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1229 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1230 error = nilfs_create_node(dvp, vpp, vap, cnp); 1231 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1232 if (!error) { 1233 dir_node = VTOI(dvp); 1234 nilfs_node = VTOI(*vpp); 1235 KASSERT(nilfs_node); 1236 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1237 if (error) { 1238 /* remove node */ 1239 nilfs_shrink_node(nilfs_node, 0); 1240 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1241 } 1242 } 1243 if (error || !(cnp->cn_flags & SAVESTART)) 1244 PNBUF_PUT(cnp->cn_pnbuf); 1245 vput(dvp); 1246 return error; 1247 } 1248 1249 /* --------------------------------------------------------------------- */ 1250 1251 int 1252 nilfs_readlink(void *v) 1253 { 1254 struct vop_readlink_args /* { 1255 struct vnode *a_vp; 1256 struct uio *a_uio; 1257 kauth_cred_t a_cred; 1258 } */ *ap = v; 1259 #if 0 1260 struct vnode *vp = ap->a_vp; 1261 struct uio *uio = ap->a_uio; 1262 kauth_cred_t cred = ap->a_cred; 1263 struct nilfs_node *nilfs_node; 1264 struct pathcomp pathcomp; 1265 struct vattr vattr; 1266 uint8_t *pathbuf, *targetbuf, *tmpname; 1267 uint8_t *pathpos, *targetpos; 1268 char *mntonname; 1269 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1270 int first, error; 1271 #endif 1272 ap = ap; 1273 1274 DPRINTF(VFSCALL, ("nilfs_readlink called\n")); 1275 1276 return EROFS; 1277 } 1278 1279 /* --------------------------------------------------------------------- */ 1280 1281 /* note: i tried to follow the logics of the tmpfs rename code */ 1282 int 1283 nilfs_rename(void *v) 1284 { 1285 struct vop_rename_args /* { 1286 struct vnode *a_fdvp; 1287 struct vnode *a_fvp; 1288 struct componentname *a_fcnp; 1289 struct vnode *a_tdvp; 1290 struct vnode *a_tvp; 1291 struct componentname *a_tcnp; 1292 } */ *ap = v; 1293 struct vnode *tvp = ap->a_tvp; 1294 struct vnode *tdvp = ap->a_tdvp; 1295 struct vnode *fvp = ap->a_fvp; 1296 struct vnode *fdvp = ap->a_fdvp; 1297 struct componentname *tcnp = ap->a_tcnp; 1298 struct componentname *fcnp = ap->a_fcnp; 1299 struct nilfs_node *fnode, *fdnode, *tnode, *tdnode; 1300 struct vattr fvap, tvap; 1301 int error; 1302 1303 DPRINTF(VFSCALL, ("nilfs_rename called\n")); 1304 1305 /* disallow cross-device renames */ 1306 if (fvp->v_mount != tdvp->v_mount || 1307 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1308 error = EXDEV; 1309 goto out_unlocked; 1310 } 1311 1312 fnode = VTOI(fvp); 1313 fdnode = VTOI(fdvp); 1314 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1315 tdnode = VTOI(tdvp); 1316 1317 /* lock our source dir */ 1318 if (fdnode != tdnode) { 1319 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1320 if (error != 0) 1321 goto out_unlocked; 1322 } 1323 1324 /* get info about the node to be moved */ 1325 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1326 KASSERT(error == 0); 1327 1328 /* check when to delete the old already existing entry */ 1329 if (tvp) { 1330 /* get info about the node to be moved to */ 1331 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1332 KASSERT(error == 0); 1333 1334 /* if both dirs, make sure the destination is empty */ 1335 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1336 if (tvap.va_nlink > 2) { 1337 error = ENOTEMPTY; 1338 goto out; 1339 } 1340 } 1341 /* if moving dir, make sure destination is dir too */ 1342 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1343 error = ENOTDIR; 1344 goto out; 1345 } 1346 /* if we're moving a non-directory, make sure dest is no dir */ 1347 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1348 error = EISDIR; 1349 goto out; 1350 } 1351 } 1352 1353 /* dont allow renaming directories acros directory for now */ 1354 if (fdnode != tdnode) { 1355 if (fvp->v_type == VDIR) { 1356 error = EINVAL; 1357 goto out; 1358 } 1359 } 1360 1361 /* remove existing entry if present */ 1362 if (tvp) 1363 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1364 1365 /* create new directory entry for the node */ 1366 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1367 if (error) 1368 goto out; 1369 1370 /* unlink old directory entry for the node, if failing, unattach new */ 1371 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1372 if (error) 1373 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1374 1375 out: 1376 if (fdnode != tdnode) 1377 VOP_UNLOCK(fdvp, 0); 1378 1379 out_unlocked: 1380 VOP_ABORTOP(tdvp, tcnp); 1381 if (tdvp == tvp) 1382 vrele(tdvp); 1383 else 1384 vput(tdvp); 1385 if (tvp) 1386 vput(tvp); 1387 VOP_ABORTOP(fdvp, fcnp); 1388 1389 /* release source nodes. */ 1390 vrele(fdvp); 1391 vrele(fvp); 1392 1393 return error; 1394 } 1395 1396 /* --------------------------------------------------------------------- */ 1397 1398 int 1399 nilfs_remove(void *v) 1400 { 1401 struct vop_remove_args /* { 1402 struct vnode *a_dvp; 1403 struct vnode *a_vp; 1404 struct componentname *a_cnp; 1405 } */ *ap = v; 1406 struct vnode *dvp = ap->a_dvp; 1407 struct vnode *vp = ap->a_vp; 1408 struct componentname *cnp = ap->a_cnp; 1409 struct nilfs_node *dir_node = VTOI(dvp); 1410 struct nilfs_node *nilfs_node = VTOI(vp); 1411 struct nilfs_mount *ump = dir_node->ump; 1412 int error; 1413 1414 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1415 if (vp->v_type != VDIR) { 1416 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1417 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1418 } else { 1419 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1420 error = EPERM; 1421 } 1422 1423 if (error == 0) { 1424 VN_KNOTE(vp, NOTE_DELETE); 1425 VN_KNOTE(dvp, NOTE_WRITE); 1426 } 1427 1428 if (dvp == vp) 1429 vrele(vp); 1430 else 1431 vput(vp); 1432 vput(dvp); 1433 1434 return error; 1435 } 1436 1437 /* --------------------------------------------------------------------- */ 1438 1439 int 1440 nilfs_rmdir(void *v) 1441 { 1442 struct vop_rmdir_args /* { 1443 struct vnode *a_dvp; 1444 struct vnode *a_vp; 1445 struct componentname *a_cnp; 1446 } */ *ap = v; 1447 struct vnode *vp = ap->a_vp; 1448 struct vnode *dvp = ap->a_dvp; 1449 struct componentname *cnp = ap->a_cnp; 1450 struct nilfs_node *dir_node = VTOI(dvp); 1451 struct nilfs_node *nilfs_node = VTOI(vp); 1452 struct nilfs_mount *ump = dir_node->ump; 1453 int refcnt, error; 1454 1455 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1456 1457 /* don't allow '.' to be deleted */ 1458 if (dir_node == nilfs_node) { 1459 vrele(dvp); 1460 vput(vp); 1461 return EINVAL; 1462 } 1463 1464 /* check to see if the directory is empty */ 1465 error = 0; 1466 refcnt = 2; /* XXX */ 1467 if (refcnt > 1) { 1468 /* NOT empty */ 1469 vput(dvp); 1470 vput(vp); 1471 return ENOTEMPTY; 1472 } 1473 1474 /* detach the node from the directory */ 1475 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1476 if (error == 0) { 1477 cache_purge(vp); 1478 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1479 VN_KNOTE(vp, NOTE_DELETE); 1480 } 1481 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1482 1483 /* unput the nodes and exit */ 1484 vput(dvp); 1485 vput(vp); 1486 1487 return error; 1488 } 1489 1490 /* --------------------------------------------------------------------- */ 1491 1492 int 1493 nilfs_fsync(void *v) 1494 { 1495 struct vop_fsync_args /* { 1496 struct vnode *a_vp; 1497 kauth_cred_t a_cred; 1498 int a_flags; 1499 off_t offlo; 1500 off_t offhi; 1501 struct proc *a_p; 1502 } */ *ap = v; 1503 struct vnode *vp = ap->a_vp; 1504 // struct nilfs_node *nilfs_node = VTOI(vp); 1505 // int error, flags, wait; 1506 1507 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1508 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1509 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1510 1511 vp = vp; 1512 return 0; 1513 } 1514 1515 /* --------------------------------------------------------------------- */ 1516 1517 int 1518 nilfs_advlock(void *v) 1519 { 1520 struct vop_advlock_args /* { 1521 struct vnode *a_vp; 1522 void *a_id; 1523 int a_op; 1524 struct flock *a_fl; 1525 int a_flags; 1526 } */ *ap = v; 1527 struct vnode *vp = ap->a_vp; 1528 struct nilfs_node *nilfs_node = VTOI(vp); 1529 uint64_t file_size; 1530 1531 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1532 1533 assert(nilfs_node); 1534 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1535 1536 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1537 } 1538 1539 /* --------------------------------------------------------------------- */ 1540 1541 1542 /* Global vfs vnode data structures for nilfss */ 1543 int (**nilfs_vnodeop_p) __P((void *)); 1544 1545 const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1546 { &vop_default_desc, vn_default_error }, 1547 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1548 { &vop_create_desc, nilfs_create }, /* create */ 1549 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1550 { &vop_open_desc, nilfs_open }, /* open */ 1551 { &vop_close_desc, nilfs_close }, /* close */ 1552 { &vop_access_desc, nilfs_access }, /* access */ 1553 { &vop_getattr_desc, nilfs_getattr }, /* getattr */ 1554 { &vop_setattr_desc, nilfs_setattr }, /* setattr */ /* TODO chflags */ 1555 { &vop_read_desc, nilfs_read }, /* read */ 1556 { &vop_write_desc, nilfs_write }, /* write */ /* WRITE */ 1557 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1558 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1559 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1560 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1561 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1562 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1563 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1564 { &vop_seek_desc, genfs_seek }, /* seek */ 1565 { &vop_remove_desc, nilfs_remove }, /* remove */ 1566 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1567 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1568 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1569 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1570 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1571 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1572 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1573 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1574 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1575 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1576 { &vop_lock_desc, genfs_lock }, /* lock */ 1577 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1578 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1579 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1580 /* { &vop_print_desc, nilfs_print }, */ /* print */ 1581 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1582 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1583 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1584 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1585 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1586 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1587 { NULL, NULL } 1588 }; 1589 1590 1591 const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1592 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1593 }; 1594 1595