nilfs_vnops.c revision 1.16.6.2
1 /* $NetBSD: nilfs_vnops.c,v 1.16.6.2 2013/06/13 06:49:08 msaitoh 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 1.16.6.2 2013/06/13 06:49:08 msaitoh 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 if (vp->v_mount->mnt_flag & MNT_RELATIME) 284 nilfs_node->i_flags |= IN_ACCESS; 285 286 /* 287 * XXX TODO FFS has code here to reset setuid & setgid when we're not 288 * the superuser as a precaution against tampering. 289 */ 290 291 /* if we wrote a thing, note write action on vnode */ 292 if (resid > uio->uio_resid) 293 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 294 295 if (error) { 296 /* bring back file size to its former size */ 297 /* take notice of its errors? */ 298 // (void) nilfs_chsize(vp, (u_quad_t) old_size, NOCRED); 299 300 /* roll back uio */ 301 uio->uio_offset -= resid - uio->uio_resid; 302 uio->uio_resid = resid; 303 } else { 304 /* if we write and we're synchronous, update node */ 305 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 306 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 307 } 308 309 return error; 310 } 311 312 313 /* --------------------------------------------------------------------- */ 314 315 /* 316 * bmap functionality that translates logical block numbers to the virtual 317 * block numbers to be stored on the vnode itself. 318 * 319 * Important alert! 320 * 321 * If runp is not NULL, the number of contiguous blocks __starting from the 322 * next block after the queried block__ will be returned in runp. 323 */ 324 325 int 326 nilfs_trivial_bmap(void *v) 327 { 328 struct vop_bmap_args /* { 329 struct vnode *a_vp; 330 daddr_t a_bn; 331 struct vnode **a_vpp; 332 daddr_t *a_bnp; 333 int *a_runp; 334 } */ *ap = v; 335 struct vnode *vp = ap->a_vp; /* our node */ 336 struct vnode **vpp = ap->a_vpp; /* return node */ 337 daddr_t *bnp = ap->a_bnp; /* translated */ 338 daddr_t bn = ap->a_bn; /* origional */ 339 int *runp = ap->a_runp; 340 struct nilfs_node *node = VTOI(vp); 341 uint64_t *l2vmap; 342 uint32_t blocksize; 343 int blks, run, error; 344 345 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 346 /* XXX could return `-1' to indicate holes/zero's */ 347 348 blocksize = node->nilfsdev->blocksize; 349 blks = MAXPHYS / blocksize; 350 351 /* get mapping memory */ 352 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 353 354 /* get virtual block numbers for the vnode's buffer span */ 355 error = nilfs_btree_nlookup(node, bn, blks, l2vmap); 356 if (error) { 357 free(l2vmap, M_TEMP); 358 return error; 359 } 360 361 /* store virtual blocks on our own vp */ 362 if (vpp) 363 *vpp = vp; 364 365 /* start at virt[0] */ 366 *bnp = l2vmap[0]; 367 368 /* get runlength */ 369 run = 1; 370 while ((run < blks) && (l2vmap[run] == *bnp + run)) 371 run++; 372 run--; /* see comment at start of function */ 373 374 /* set runlength */ 375 if (runp) 376 *runp = run; 377 378 DPRINTF(TRANSLATE, ("\tstart %"PRIu64" -> %"PRIu64" run %d\n", 379 bn, *bnp, run)); 380 381 /* mark not translated on virtual block number 0 */ 382 if (*bnp == 0) 383 *bnp = -1; 384 385 /* return success */ 386 free(l2vmap, M_TEMP); 387 return 0; 388 } 389 390 /* --------------------------------------------------------------------- */ 391 392 static void 393 nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 394 { 395 struct nilfs_device *nilfsdev = node->nilfsdev; 396 struct buf *nbp; 397 uint64_t *l2vmap, *v2pmap; 398 uint64_t from, blks; 399 uint32_t blocksize, buf_offset; 400 uint8_t *buf_pos; 401 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 402 int i, error; 403 404 /* 405 * Translate all the block sectors into a series of buffers to read 406 * asynchronously from the nilfs device. Note that this lookup may 407 * induce readin's too. 408 */ 409 410 blocksize = nilfsdev->blocksize; 411 412 from = bp->b_blkno; 413 blks = bp->b_bcount / blocksize; 414 415 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 416 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 417 418 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 419 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 420 421 /* get mapping memory */ 422 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 423 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 424 425 /* get virtual block numbers for the vnode's buffer span */ 426 for (i = 0; i < blks; i++) 427 l2vmap[i] = from + i; 428 429 /* translate virtual block numbers to physical block numbers */ 430 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 431 if (error) 432 goto out; 433 434 /* issue translated blocks */ 435 bp->b_resid = bp->b_bcount; 436 for (i = 0; i < blks; i++) { 437 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 438 "%"PRIu64" -> %"PRIu64"\n", 439 node->ino, i, l2vmap[i], v2pmap[i])); 440 441 buf_offset = i * blocksize; 442 buf_pos = (uint8_t *) bp->b_data + buf_offset; 443 444 /* note virtual block 0 marks not mapped */ 445 if (l2vmap[i] == 0) { 446 memset(buf_pos, 0, blocksize); 447 nestiobuf_done(bp, blocksize, 0); 448 continue; 449 } 450 451 /* nest iobuf */ 452 nbp = getiobuf(NULL, true); 453 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 454 KASSERT(nbp->b_vp == node->vnode); 455 /* nbp is B_ASYNC */ 456 457 nbp->b_lblkno = i; 458 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 459 nbp->b_rawblkno = nbp->b_blkno; 460 461 VOP_STRATEGY(nilfsdev->devvp, nbp); 462 } 463 464 if ((bp->b_flags & B_ASYNC) == 0) 465 biowait(bp); 466 467 out: 468 free(l2vmap, M_TEMP); 469 free(v2pmap, M_TEMP); 470 if (error) { 471 bp->b_error = EIO; 472 biodone(bp); 473 } 474 } 475 476 477 static void 478 nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 479 { 480 /* TODO pass on to segment collector */ 481 panic("nilfs_strategy writing called\n"); 482 } 483 484 485 int 486 nilfs_vfsstrategy(void *v) 487 { 488 struct vop_strategy_args /* { 489 struct vnode *a_vp; 490 struct buf *a_bp; 491 } */ *ap = v; 492 struct vnode *vp = ap->a_vp; 493 struct buf *bp = ap->a_bp; 494 struct nilfs_node *node = VTOI(vp); 495 496 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 497 498 /* check if we ought to be here */ 499 if (vp->v_type == VBLK || vp->v_type == VCHR) 500 panic("nilfs_strategy: spec"); 501 502 /* translate if needed and pass on */ 503 if (bp->b_flags & B_READ) { 504 nilfs_read_filebuf(node, bp); 505 return bp->b_error; 506 } 507 508 /* send to segment collector */ 509 nilfs_write_filebuf(node, bp); 510 return bp->b_error; 511 } 512 513 /* --------------------------------------------------------------------- */ 514 515 int 516 nilfs_readdir(void *v) 517 { 518 struct vop_readdir_args /* { 519 struct vnode *a_vp; 520 struct uio *a_uio; 521 kauth_cred_t a_cred; 522 int *a_eofflag; 523 off_t **a_cookies; 524 int *a_ncookies; 525 } */ *ap = v; 526 struct uio *uio = ap->a_uio; 527 struct vnode *vp = ap->a_vp; 528 struct nilfs_node *node = VTOI(vp); 529 struct nilfs_dir_entry *ndirent; 530 struct dirent dirent; 531 struct buf *bp; 532 uint64_t file_size, diroffset, transoffset, blkoff; 533 uint64_t blocknr; 534 uint32_t blocksize = node->nilfsdev->blocksize; 535 uint8_t *pos, name_len; 536 int error; 537 538 DPRINTF(READDIR, ("nilfs_readdir called\n")); 539 540 if (vp->v_type != VDIR) 541 return ENOTDIR; 542 543 file_size = nilfs_rw64(node->inode.i_size); 544 545 /* we are called just as long as we keep on pushing data in */ 546 error = 0; 547 if ((uio->uio_offset < file_size) && 548 (uio->uio_resid >= sizeof(struct dirent))) { 549 diroffset = uio->uio_offset; 550 transoffset = diroffset; 551 552 blocknr = diroffset / blocksize; 553 blkoff = diroffset % blocksize; 554 error = nilfs_bread(node, blocknr, NOCRED, 0, &bp); 555 if (error) 556 return EIO; 557 while (diroffset < file_size) { 558 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 559 diroffset)); 560 if (blkoff >= blocksize) { 561 blkoff = 0; blocknr++; 562 brelse(bp, BC_AGE); 563 error = nilfs_bread(node, blocknr, NOCRED, 0, 564 &bp); 565 if (error) 566 return EIO; 567 } 568 569 /* read in one dirent */ 570 pos = (uint8_t *) bp->b_data + blkoff; 571 ndirent = (struct nilfs_dir_entry *) pos; 572 573 name_len = ndirent->name_len; 574 memset(&dirent, 0, sizeof(struct dirent)); 575 dirent.d_fileno = nilfs_rw64(ndirent->inode); 576 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 577 dirent.d_namlen = name_len; 578 strncpy(dirent.d_name, ndirent->name, name_len); 579 dirent.d_reclen = _DIRENT_SIZE(&dirent); 580 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 581 name_len, dirent.d_name)); 582 583 /* 584 * If there isn't enough space in the uio to return a 585 * whole dirent, break off read 586 */ 587 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 588 break; 589 590 /* transfer */ 591 if (name_len) 592 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 593 594 /* advance */ 595 diroffset += nilfs_rw16(ndirent->rec_len); 596 blkoff += nilfs_rw16(ndirent->rec_len); 597 598 /* remember the last entry we transfered */ 599 transoffset = diroffset; 600 } 601 brelse(bp, BC_AGE); 602 603 /* pass on last transfered offset */ 604 uio->uio_offset = transoffset; 605 } 606 607 if (ap->a_eofflag) 608 *ap->a_eofflag = (uio->uio_offset >= file_size); 609 610 return error; 611 } 612 613 /* --------------------------------------------------------------------- */ 614 615 int 616 nilfs_lookup(void *v) 617 { 618 struct vop_lookup_args /* { 619 struct vnode *a_dvp; 620 struct vnode **a_vpp; 621 struct componentname *a_cnp; 622 } */ *ap = v; 623 struct vnode *dvp = ap->a_dvp; 624 struct vnode **vpp = ap->a_vpp; 625 struct componentname *cnp = ap->a_cnp; 626 struct nilfs_node *dir_node, *res_node; 627 struct nilfs_mount *ump; 628 uint64_t ino; 629 const char *name; 630 int namelen, nameiop, islastcn, mounted_ro; 631 int vnodetp; 632 int error, found; 633 634 dir_node = VTOI(dvp); 635 ump = dir_node->ump; 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 = dvp->v_mount->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 nami cache; returns 0 on success!! */ 662 error = cache_lookup(dvp, vpp, cnp); 663 if (error >= 0) 664 return error; 665 666 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 667 668 /* 669 * Obviously, the file is not (anymore) in the namecache, we have to 670 * search for it. There are three basic cases: '.', '..' and others. 671 * 672 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 673 */ 674 error = 0; 675 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 676 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 677 /* special case 1 '.' */ 678 vref(dvp); 679 *vpp = dvp; 680 /* done */ 681 } else if (cnp->cn_flags & ISDOTDOT) { 682 /* special case 2 '..' */ 683 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 684 685 /* get our node */ 686 name = ".."; 687 namelen = 2; 688 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 689 &ino, &found); 690 if (error) 691 goto out; 692 if (!found) 693 error = ENOENT; 694 695 /* first unlock parent */ 696 VOP_UNLOCK(dvp); 697 698 if (error == 0) { 699 DPRINTF(LOOKUP, ("\tfound '..'\n")); 700 /* try to create/reuse the node */ 701 error = nilfs_get_node(ump, ino, &res_node); 702 703 if (!error) { 704 DPRINTF(LOOKUP, 705 ("\tnode retrieved/created OK\n")); 706 *vpp = res_node->vnode; 707 } 708 } 709 710 /* try to relock parent */ 711 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 712 } else { 713 DPRINTF(LOOKUP, ("\tlookup file\n")); 714 /* all other files */ 715 /* lookup filename in the directory returning its inode */ 716 name = cnp->cn_nameptr; 717 namelen = cnp->cn_namelen; 718 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 719 &ino, &found); 720 if (error) 721 goto out; 722 if (!found) { 723 DPRINTF(LOOKUP, ("\tNOT found\n")); 724 /* 725 * UGH, didn't find name. If we're creating or 726 * renaming on the last name this is OK and we ought 727 * to return EJUSTRETURN if its allowed to be created. 728 */ 729 error = ENOENT; 730 if (islastcn && 731 (nameiop == CREATE || nameiop == RENAME)) 732 error = 0; 733 if (!error) { 734 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 735 if (!error) { 736 error = EJUSTRETURN; 737 } 738 } 739 /* done */ 740 } else { 741 /* try to create/reuse the node */ 742 error = nilfs_get_node(ump, ino, &res_node); 743 if (!error) { 744 /* 745 * If we are not at the last path component 746 * and found a non-directory or non-link entry 747 * (which may itself be pointing to a 748 * directory), raise an error. 749 */ 750 vnodetp = res_node->vnode->v_type; 751 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 752 if (!islastcn) 753 error = ENOTDIR; 754 } 755 756 } 757 if (!error) { 758 *vpp = res_node->vnode; 759 } 760 } 761 } 762 763 out: 764 /* 765 * Store result in the cache if requested. If we are creating a file, 766 * the file might not be found and thus putting it into the namecache 767 * might be seen as negative caching. 768 */ 769 if (nameiop != CREATE) 770 cache_enter(dvp, *vpp, cnp); 771 772 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returing error %d\n", error)); 773 774 return error; 775 } 776 777 /* --------------------------------------------------------------------- */ 778 779 static void 780 nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 781 { 782 ts->tv_sec = ctime; 783 ts->tv_nsec = 0; 784 } 785 786 787 int 788 nilfs_getattr(void *v) 789 { 790 struct vop_getattr_args /* { 791 struct vnode *a_vp; 792 struct vattr *a_vap; 793 kauth_cred_t a_cred; 794 struct lwp *a_l; 795 } */ *ap = v; 796 struct vnode *vp = ap->a_vp; 797 struct vattr *vap = ap->a_vap; 798 struct nilfs_node *node = VTOI(vp); 799 struct nilfs_inode *inode = &node->inode; 800 801 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 802 803 /* basic info */ 804 vattr_null(vap); 805 vap->va_type = vp->v_type; 806 vap->va_mode = nilfs_rw16(inode->i_mode); /* XXX same? */ 807 vap->va_nlink = nilfs_rw16(inode->i_links_count); 808 vap->va_uid = nilfs_rw32(inode->i_uid); 809 vap->va_gid = nilfs_rw32(inode->i_gid); 810 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 811 vap->va_fileid = node->ino; 812 vap->va_size = nilfs_rw64(inode->i_size); 813 vap->va_blocksize = node->nilfsdev->blocksize; 814 815 /* times */ 816 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 817 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 818 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 819 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 820 821 vap->va_gen = nilfs_rw32(inode->i_generation); 822 vap->va_flags = 0; /* vattr flags */ 823 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 824 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 825 vap->va_vaflags = 0; /* XXX chflags flags */ 826 827 return 0; 828 } 829 830 /* --------------------------------------------------------------------- */ 831 832 #if 0 833 static int 834 nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 835 kauth_cred_t cred) 836 { 837 return EINVAL; 838 } 839 840 841 static int 842 nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 843 { 844 845 return EINVAL; 846 } 847 848 849 /* exported */ 850 int 851 nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 852 { 853 return EINVAL; 854 } 855 856 857 static int 858 nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 859 { 860 return EINVAL; 861 } 862 863 864 static int 865 nilfs_chtimes(struct vnode *vp, 866 struct timespec *atime, struct timespec *mtime, 867 struct timespec *birthtime, int setattrflags, 868 kauth_cred_t cred) 869 { 870 return EINVAL; 871 } 872 #endif 873 874 875 int 876 nilfs_setattr(void *v) 877 { 878 struct vop_setattr_args /* { 879 struct vnode *a_vp; 880 struct vattr *a_vap; 881 kauth_cred_t a_cred; 882 struct lwp *a_l; 883 } */ *ap = v; 884 struct vnode *vp = ap->a_vp; 885 886 vp = vp; 887 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 888 return EINVAL; 889 } 890 891 /* --------------------------------------------------------------------- */ 892 893 /* 894 * Return POSIX pathconf information for NILFS file systems. 895 */ 896 int 897 nilfs_pathconf(void *v) 898 { 899 struct vop_pathconf_args /* { 900 struct vnode *a_vp; 901 int a_name; 902 register_t *a_retval; 903 } */ *ap = v; 904 uint32_t bits; 905 906 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 907 908 switch (ap->a_name) { 909 case _PC_LINK_MAX: 910 *ap->a_retval = (1<<16)-1; /* 16 bits */ 911 return 0; 912 case _PC_NAME_MAX: 913 *ap->a_retval = NILFS_MAXNAMLEN; 914 return 0; 915 case _PC_PATH_MAX: 916 *ap->a_retval = PATH_MAX; 917 return 0; 918 case _PC_PIPE_BUF: 919 *ap->a_retval = PIPE_BUF; 920 return 0; 921 case _PC_CHOWN_RESTRICTED: 922 *ap->a_retval = 1; 923 return 0; 924 case _PC_NO_TRUNC: 925 *ap->a_retval = 1; 926 return 0; 927 case _PC_SYNC_IO: 928 *ap->a_retval = 0; /* synchronised is off for performance */ 929 return 0; 930 case _PC_FILESIZEBITS: 931 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 932 bits = 64; /* XXX ought to deliver 65 */ 933 #if 0 934 if (nilfs_node) 935 bits = 64 * vp->v_mount->mnt_dev_bshift; 936 #endif 937 *ap->a_retval = bits; 938 return 0; 939 } 940 941 return EINVAL; 942 } 943 944 945 /* --------------------------------------------------------------------- */ 946 947 int 948 nilfs_open(void *v) 949 { 950 struct vop_open_args /* { 951 struct vnode *a_vp; 952 int a_mode; 953 kauth_cred_t a_cred; 954 struct proc *a_p; 955 } */ *ap = v; 956 int flags; 957 958 DPRINTF(VFSCALL, ("nilfs_open called\n")); 959 960 /* 961 * Files marked append-only must be opened for appending. 962 */ 963 flags = 0; 964 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 965 return (EPERM); 966 967 return 0; 968 } 969 970 971 /* --------------------------------------------------------------------- */ 972 973 int 974 nilfs_close(void *v) 975 { 976 struct vop_close_args /* { 977 struct vnode *a_vp; 978 int a_fflag; 979 kauth_cred_t a_cred; 980 struct proc *a_p; 981 } */ *ap = v; 982 struct vnode *vp = ap->a_vp; 983 struct nilfs_node *nilfs_node = VTOI(vp); 984 985 DPRINTF(VFSCALL, ("nilfs_close called\n")); 986 nilfs_node = nilfs_node; /* shut up gcc */ 987 988 mutex_enter(vp->v_interlock); 989 if (vp->v_usecount > 1) 990 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 991 mutex_exit(vp->v_interlock); 992 993 return 0; 994 } 995 996 997 /* --------------------------------------------------------------------- */ 998 999 static int 1000 nilfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1001 { 1002 int flags; 1003 1004 /* check if we are allowed to write */ 1005 switch (vap->va_type) { 1006 case VDIR: 1007 case VLNK: 1008 case VREG: 1009 /* 1010 * normal nodes: check if we're on a read-only mounted 1011 * filingsystem and bomb out if we're trying to write. 1012 */ 1013 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1014 return EROFS; 1015 break; 1016 case VBLK: 1017 case VCHR: 1018 case VSOCK: 1019 case VFIFO: 1020 /* 1021 * special nodes: even on read-only mounted filingsystems 1022 * these are allowed to be written to if permissions allow. 1023 */ 1024 break; 1025 default: 1026 /* no idea what this is */ 1027 return EINVAL; 1028 } 1029 1030 /* noone may write immutable files */ 1031 /* TODO: get chflags(2) flags */ 1032 flags = 0; 1033 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1034 return EPERM; 1035 1036 return 0; 1037 } 1038 1039 static int 1040 nilfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1041 kauth_cred_t cred) 1042 { 1043 1044 /* ask the generic genfs_can_access to advice on security */ 1045 return genfs_can_access(vp->v_type, 1046 vap->va_mode, vap->va_uid, vap->va_gid, 1047 mode, cred); 1048 } 1049 1050 int 1051 nilfs_access(void *v) 1052 { 1053 struct vop_access_args /* { 1054 struct vnode *a_vp; 1055 int a_mode; 1056 kauth_cred_t a_cred; 1057 struct proc *a_p; 1058 } */ *ap = v; 1059 struct vnode *vp = ap->a_vp; 1060 mode_t mode = ap->a_mode; 1061 kauth_cred_t cred = ap->a_cred; 1062 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1063 struct vattr vap; 1064 int error; 1065 1066 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1067 1068 error = VOP_GETATTR(vp, &vap, NULL); 1069 if (error) 1070 return error; 1071 1072 error = nilfs_check_possible(vp, &vap, mode); 1073 if (error) 1074 return error; 1075 1076 error = nilfs_check_permitted(vp, &vap, mode, cred); 1077 1078 return error; 1079 } 1080 1081 /* --------------------------------------------------------------------- */ 1082 1083 int 1084 nilfs_create(void *v) 1085 { 1086 struct vop_create_args /* { 1087 struct vnode *a_dvp; 1088 struct vnode **a_vpp; 1089 struct componentname *a_cnp; 1090 struct vattr *a_vap; 1091 } */ *ap = v; 1092 struct vnode *dvp = ap->a_dvp; 1093 struct vnode **vpp = ap->a_vpp; 1094 struct vattr *vap = ap->a_vap; 1095 struct componentname *cnp = ap->a_cnp; 1096 int error; 1097 1098 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1099 error = nilfs_create_node(dvp, vpp, vap, cnp); 1100 1101 vput(dvp); 1102 return error; 1103 } 1104 1105 /* --------------------------------------------------------------------- */ 1106 1107 int 1108 nilfs_mknod(void *v) 1109 { 1110 struct vop_mknod_args /* { 1111 struct vnode *a_dvp; 1112 struct vnode **a_vpp; 1113 struct componentname *a_cnp; 1114 struct vattr *a_vap; 1115 } */ *ap = v; 1116 struct vnode *dvp = ap->a_dvp; 1117 struct vnode **vpp = ap->a_vpp; 1118 struct vattr *vap = ap->a_vap; 1119 struct componentname *cnp = ap->a_cnp; 1120 int error; 1121 1122 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1123 error = nilfs_create_node(dvp, vpp, vap, cnp); 1124 1125 vput(dvp); 1126 return error; 1127 } 1128 1129 /* --------------------------------------------------------------------- */ 1130 1131 int 1132 nilfs_mkdir(void *v) 1133 { 1134 struct vop_mkdir_args /* { 1135 struct vnode *a_dvp; 1136 struct vnode **a_vpp; 1137 struct componentname *a_cnp; 1138 struct vattr *a_vap; 1139 } */ *ap = v; 1140 struct vnode *dvp = ap->a_dvp; 1141 struct vnode **vpp = ap->a_vpp; 1142 struct vattr *vap = ap->a_vap; 1143 struct componentname *cnp = ap->a_cnp; 1144 int error; 1145 1146 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1147 error = nilfs_create_node(dvp, vpp, vap, cnp); 1148 1149 vput(dvp); 1150 return error; 1151 } 1152 1153 /* --------------------------------------------------------------------- */ 1154 1155 static int 1156 nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1157 { 1158 struct nilfs_node *nilfs_node, *dir_node; 1159 struct vattr vap; 1160 int error; 1161 1162 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1163 KASSERT(dvp != vp); 1164 KASSERT(vp->v_type != VDIR); 1165 KASSERT(dvp->v_mount == vp->v_mount); 1166 1167 /* lock node */ 1168 error = vn_lock(vp, LK_EXCLUSIVE); 1169 if (error) 1170 return error; 1171 1172 /* get attributes */ 1173 dir_node = VTOI(dvp); 1174 nilfs_node = VTOI(vp); 1175 1176 error = VOP_GETATTR(vp, &vap, FSCRED); 1177 if (error) { 1178 VOP_UNLOCK(vp); 1179 return error; 1180 } 1181 1182 /* check link count overflow */ 1183 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1184 VOP_UNLOCK(vp); 1185 return EMLINK; 1186 } 1187 1188 error = nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, 1189 &vap, cnp); 1190 if (error) 1191 VOP_UNLOCK(vp); 1192 return error; 1193 } 1194 1195 int 1196 nilfs_link(void *v) 1197 { 1198 struct vop_link_args /* { 1199 struct vnode *a_dvp; 1200 struct vnode *a_vp; 1201 struct componentname *a_cnp; 1202 } */ *ap = v; 1203 struct vnode *dvp = ap->a_dvp; 1204 struct vnode *vp = ap->a_vp; 1205 struct componentname *cnp = ap->a_cnp; 1206 int error; 1207 1208 error = nilfs_do_link(dvp, vp, cnp); 1209 if (error) 1210 VOP_ABORTOP(dvp, cnp); 1211 1212 VN_KNOTE(vp, NOTE_LINK); 1213 VN_KNOTE(dvp, NOTE_WRITE); 1214 vput(dvp); 1215 1216 return error; 1217 } 1218 1219 /* --------------------------------------------------------------------- */ 1220 1221 static int 1222 nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1223 { 1224 return EROFS; 1225 } 1226 1227 1228 int 1229 nilfs_symlink(void *v) 1230 { 1231 struct vop_symlink_args /* { 1232 struct vnode *a_dvp; 1233 struct vnode **a_vpp; 1234 struct componentname *a_cnp; 1235 struct vattr *a_vap; 1236 char *a_target; 1237 } */ *ap = v; 1238 struct vnode *dvp = ap->a_dvp; 1239 struct vnode **vpp = ap->a_vpp; 1240 struct vattr *vap = ap->a_vap; 1241 struct componentname *cnp = ap->a_cnp; 1242 struct nilfs_node *dir_node; 1243 struct nilfs_node *nilfs_node; 1244 int error; 1245 1246 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1247 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1248 error = nilfs_create_node(dvp, vpp, vap, cnp); 1249 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1250 if (!error) { 1251 dir_node = VTOI(dvp); 1252 nilfs_node = VTOI(*vpp); 1253 KASSERT(nilfs_node); 1254 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1255 if (error) { 1256 /* remove node */ 1257 nilfs_shrink_node(nilfs_node, 0); 1258 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1259 } 1260 } 1261 vput(dvp); 1262 return error; 1263 } 1264 1265 /* --------------------------------------------------------------------- */ 1266 1267 int 1268 nilfs_readlink(void *v) 1269 { 1270 struct vop_readlink_args /* { 1271 struct vnode *a_vp; 1272 struct uio *a_uio; 1273 kauth_cred_t a_cred; 1274 } */ *ap = v; 1275 #if 0 1276 struct vnode *vp = ap->a_vp; 1277 struct uio *uio = ap->a_uio; 1278 kauth_cred_t cred = ap->a_cred; 1279 struct nilfs_node *nilfs_node; 1280 struct pathcomp pathcomp; 1281 struct vattr vattr; 1282 uint8_t *pathbuf, *targetbuf, *tmpname; 1283 uint8_t *pathpos, *targetpos; 1284 char *mntonname; 1285 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1286 int first, error; 1287 #endif 1288 ap = ap; 1289 1290 DPRINTF(VFSCALL, ("nilfs_readlink called\n")); 1291 1292 return EROFS; 1293 } 1294 1295 /* --------------------------------------------------------------------- */ 1296 1297 /* note: i tried to follow the logics of the tmpfs rename code */ 1298 int 1299 nilfs_rename(void *v) 1300 { 1301 struct vop_rename_args /* { 1302 struct vnode *a_fdvp; 1303 struct vnode *a_fvp; 1304 struct componentname *a_fcnp; 1305 struct vnode *a_tdvp; 1306 struct vnode *a_tvp; 1307 struct componentname *a_tcnp; 1308 } */ *ap = v; 1309 struct vnode *tvp = ap->a_tvp; 1310 struct vnode *tdvp = ap->a_tdvp; 1311 struct vnode *fvp = ap->a_fvp; 1312 struct vnode *fdvp = ap->a_fdvp; 1313 struct componentname *tcnp = ap->a_tcnp; 1314 struct componentname *fcnp = ap->a_fcnp; 1315 struct nilfs_node *fnode, *fdnode, *tnode, *tdnode; 1316 struct vattr fvap, tvap; 1317 int error; 1318 1319 DPRINTF(VFSCALL, ("nilfs_rename called\n")); 1320 1321 /* disallow cross-device renames */ 1322 if (fvp->v_mount != tdvp->v_mount || 1323 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1324 error = EXDEV; 1325 goto out_unlocked; 1326 } 1327 1328 fnode = VTOI(fvp); 1329 fdnode = VTOI(fdvp); 1330 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1331 tdnode = VTOI(tdvp); 1332 1333 /* lock our source dir */ 1334 if (fdnode != tdnode) { 1335 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1336 if (error != 0) 1337 goto out_unlocked; 1338 } 1339 1340 /* get info about the node to be moved */ 1341 vn_lock(fvp, LK_SHARED | LK_RETRY); 1342 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1343 VOP_UNLOCK(fvp); 1344 KASSERT(error == 0); 1345 1346 /* check when to delete the old already existing entry */ 1347 if (tvp) { 1348 /* get info about the node to be moved to */ 1349 error = VOP_GETATTR(tvp, &tvap, FSCRED); 1350 KASSERT(error == 0); 1351 1352 /* if both dirs, make sure the destination is empty */ 1353 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1354 if (tvap.va_nlink > 2) { 1355 error = ENOTEMPTY; 1356 goto out; 1357 } 1358 } 1359 /* if moving dir, make sure destination is dir too */ 1360 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1361 error = ENOTDIR; 1362 goto out; 1363 } 1364 /* if we're moving a non-directory, make sure dest is no dir */ 1365 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1366 error = EISDIR; 1367 goto out; 1368 } 1369 } 1370 1371 /* dont allow renaming directories acros directory for now */ 1372 if (fdnode != tdnode) { 1373 if (fvp->v_type == VDIR) { 1374 error = EINVAL; 1375 goto out; 1376 } 1377 } 1378 1379 /* remove existing entry if present */ 1380 if (tvp) 1381 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1382 1383 /* create new directory entry for the node */ 1384 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1385 if (error) 1386 goto out; 1387 1388 /* unlink old directory entry for the node, if failing, unattach new */ 1389 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1390 if (error) 1391 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1392 1393 out: 1394 if (fdnode != tdnode) 1395 VOP_UNLOCK(fdvp); 1396 1397 out_unlocked: 1398 VOP_ABORTOP(tdvp, tcnp); 1399 if (tdvp == tvp) 1400 vrele(tdvp); 1401 else 1402 vput(tdvp); 1403 if (tvp) 1404 vput(tvp); 1405 VOP_ABORTOP(fdvp, fcnp); 1406 1407 /* release source nodes. */ 1408 vrele(fdvp); 1409 vrele(fvp); 1410 1411 return error; 1412 } 1413 1414 /* --------------------------------------------------------------------- */ 1415 1416 int 1417 nilfs_remove(void *v) 1418 { 1419 struct vop_remove_args /* { 1420 struct vnode *a_dvp; 1421 struct vnode *a_vp; 1422 struct componentname *a_cnp; 1423 } */ *ap = v; 1424 struct vnode *dvp = ap->a_dvp; 1425 struct vnode *vp = ap->a_vp; 1426 struct componentname *cnp = ap->a_cnp; 1427 struct nilfs_node *dir_node = VTOI(dvp); 1428 struct nilfs_node *nilfs_node = VTOI(vp); 1429 struct nilfs_mount *ump = dir_node->ump; 1430 int error; 1431 1432 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1433 if (vp->v_type != VDIR) { 1434 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1435 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1436 } else { 1437 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1438 error = EPERM; 1439 } 1440 1441 if (error == 0) { 1442 VN_KNOTE(vp, NOTE_DELETE); 1443 VN_KNOTE(dvp, NOTE_WRITE); 1444 } 1445 1446 if (dvp == vp) 1447 vrele(vp); 1448 else 1449 vput(vp); 1450 vput(dvp); 1451 1452 return error; 1453 } 1454 1455 /* --------------------------------------------------------------------- */ 1456 1457 int 1458 nilfs_rmdir(void *v) 1459 { 1460 struct vop_rmdir_args /* { 1461 struct vnode *a_dvp; 1462 struct vnode *a_vp; 1463 struct componentname *a_cnp; 1464 } */ *ap = v; 1465 struct vnode *vp = ap->a_vp; 1466 struct vnode *dvp = ap->a_dvp; 1467 struct componentname *cnp = ap->a_cnp; 1468 struct nilfs_node *dir_node = VTOI(dvp); 1469 struct nilfs_node *nilfs_node = VTOI(vp); 1470 struct nilfs_mount *ump = dir_node->ump; 1471 int refcnt, error; 1472 1473 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1474 1475 /* don't allow '.' to be deleted */ 1476 if (dir_node == nilfs_node) { 1477 vrele(dvp); 1478 vput(vp); 1479 return EINVAL; 1480 } 1481 1482 /* check to see if the directory is empty */ 1483 error = 0; 1484 refcnt = 2; /* XXX */ 1485 if (refcnt > 1) { 1486 /* NOT empty */ 1487 vput(dvp); 1488 vput(vp); 1489 return ENOTEMPTY; 1490 } 1491 1492 /* detach the node from the directory */ 1493 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1494 if (error == 0) { 1495 cache_purge(vp); 1496 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1497 VN_KNOTE(vp, NOTE_DELETE); 1498 } 1499 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1500 1501 /* unput the nodes and exit */ 1502 vput(dvp); 1503 vput(vp); 1504 1505 return error; 1506 } 1507 1508 /* --------------------------------------------------------------------- */ 1509 1510 int 1511 nilfs_fsync(void *v) 1512 { 1513 struct vop_fsync_args /* { 1514 struct vnode *a_vp; 1515 kauth_cred_t a_cred; 1516 int a_flags; 1517 off_t offlo; 1518 off_t offhi; 1519 struct proc *a_p; 1520 } */ *ap = v; 1521 struct vnode *vp = ap->a_vp; 1522 // struct nilfs_node *nilfs_node = VTOI(vp); 1523 // int error, flags, wait; 1524 1525 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1526 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1527 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1528 1529 vp = vp; 1530 return 0; 1531 } 1532 1533 /* --------------------------------------------------------------------- */ 1534 1535 int 1536 nilfs_advlock(void *v) 1537 { 1538 struct vop_advlock_args /* { 1539 struct vnode *a_vp; 1540 void *a_id; 1541 int a_op; 1542 struct flock *a_fl; 1543 int a_flags; 1544 } */ *ap = v; 1545 struct vnode *vp = ap->a_vp; 1546 struct nilfs_node *nilfs_node = VTOI(vp); 1547 uint64_t file_size; 1548 1549 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1550 1551 assert(nilfs_node); 1552 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1553 1554 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1555 } 1556 1557 /* --------------------------------------------------------------------- */ 1558 1559 1560 /* Global vfs vnode data structures for nilfss */ 1561 int (**nilfs_vnodeop_p) __P((void *)); 1562 1563 const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1564 { &vop_default_desc, vn_default_error }, 1565 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1566 { &vop_create_desc, nilfs_create }, /* create */ 1567 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1568 { &vop_open_desc, nilfs_open }, /* open */ 1569 { &vop_close_desc, nilfs_close }, /* close */ 1570 { &vop_access_desc, nilfs_access }, /* access */ 1571 { &vop_getattr_desc, nilfs_getattr }, /* getattr */ 1572 { &vop_setattr_desc, nilfs_setattr }, /* setattr */ /* TODO chflags */ 1573 { &vop_read_desc, nilfs_read }, /* read */ 1574 { &vop_write_desc, nilfs_write }, /* write */ /* WRITE */ 1575 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1576 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1577 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1578 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1579 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1580 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1581 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1582 { &vop_seek_desc, genfs_seek }, /* seek */ 1583 { &vop_remove_desc, nilfs_remove }, /* remove */ 1584 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1585 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1586 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1587 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1588 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1589 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1590 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1591 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1592 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1593 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1594 { &vop_lock_desc, genfs_lock }, /* lock */ 1595 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1596 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1597 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1598 /* { &vop_print_desc, nilfs_print }, */ /* print */ 1599 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1600 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1601 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1602 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1603 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1604 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1605 { NULL, NULL } 1606 }; 1607 1608 1609 const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1610 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1611 }; 1612 1613
Indexes created Tue Oct 28 12:10:06 GMT 2025