1 /* $NetBSD: nilfs_vnops.c,v 1.42 2020/06/27 17:29:18 christos 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 1.42 2020/06/27 17:29:18 christos 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 /* implementations of vnode functions; table follows at end */ 65 /* --------------------------------------------------------------------- */ 66 67 int 68 nilfs_inactive(void *v) 69 { 70 struct vop_inactive_v2_args /* { 71 struct vnode *a_vp; 72 bool *a_recycle; 73 } */ *ap = v; 74 struct vnode *vp = ap->a_vp; 75 struct nilfs_node *nilfs_node = VTOI(vp); 76 77 DPRINTF(NODE, ("nilfs_inactive called for nilfs_node %p\n", VTOI(vp))); 78 79 if (nilfs_node == NULL) { 80 DPRINTF(NODE, ("nilfs_inactive: inactive NULL NILFS node\n")); 81 VOP_UNLOCK(vp); 82 return 0; 83 } 84 85 /* 86 * Optionally flush metadata to disc. If the file has not been 87 * referenced anymore in a directory we ought to free up the resources 88 * on disc if applicable. 89 */ 90 91 return 0; 92 } 93 94 /* --------------------------------------------------------------------- */ 95 96 int 97 nilfs_reclaim(void *v) 98 { 99 struct vop_reclaim_v2_args /* { 100 struct vnode *a_vp; 101 } */ *ap = v; 102 struct vnode *vp = ap->a_vp; 103 struct nilfs_node *nilfs_node = VTOI(vp); 104 105 VOP_UNLOCK(vp); 106 107 DPRINTF(NODE, ("nilfs_reclaim called for node %p\n", nilfs_node)); 108 109 if (nilfs_node == NULL) { 110 DPRINTF(NODE, ("nilfs_reclaim(): null nilfsnode\n")); 111 return 0; 112 } 113 114 /* update note for closure */ 115 nilfs_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 116 117 /* dispose all node knowledge */ 118 genfs_node_destroy(vp); 119 nilfs_dispose_node(&nilfs_node); 120 121 vp->v_data = NULL; 122 123 return 0; 124 } 125 126 /* --------------------------------------------------------------------- */ 127 128 int 129 nilfs_read(void *v) 130 { 131 struct vop_read_args /* { 132 struct vnode *a_vp; 133 struct uio *a_uio; 134 int a_ioflag; 135 kauth_cred_t a_cred; 136 } */ *ap = v; 137 struct vnode *vp = ap->a_vp; 138 struct uio *uio = ap->a_uio; 139 int ioflag = ap->a_ioflag; 140 int advice = IO_ADV_DECODE(ap->a_ioflag); 141 struct uvm_object *uobj; 142 struct nilfs_node *nilfs_node = VTOI(vp); 143 uint64_t file_size; 144 vsize_t len; 145 int error; 146 147 DPRINTF(READ, ("nilfs_read called\n")); 148 149 /* can this happen? some filingsystems have this check */ 150 if (uio->uio_offset < 0) 151 return EINVAL; 152 if (uio->uio_resid == 0) 153 return 0; 154 155 /* protect against rogue programs reading raw directories and links */ 156 if ((ioflag & IO_ALTSEMANTICS) == 0) { 157 if (vp->v_type == VDIR) 158 return EISDIR; 159 /* all but regular files just give EINVAL */ 160 if (vp->v_type != VREG) 161 return EINVAL; 162 } 163 164 assert(nilfs_node); 165 file_size = nilfs_rw64(nilfs_node->inode.i_size); 166 167 /* read contents using buffercache */ 168 uobj = &vp->v_uobj; 169 error = 0; 170 while (uio->uio_resid > 0) { 171 /* reached end? */ 172 if (file_size <= uio->uio_offset) 173 break; 174 175 /* maximise length to file extremity */ 176 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 177 if (len == 0) 178 break; 179 180 /* ubc, here we come, prepare to trap */ 181 error = ubc_uiomove(uobj, uio, len, advice, 182 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 183 if (error) 184 break; 185 } 186 187 /* note access time unless not requested */ 188 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 189 nilfs_node->i_flags |= IN_ACCESS; 190 if ((ioflag & IO_SYNC) == IO_SYNC) 191 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 192 } 193 194 return error; 195 } 196 197 /* --------------------------------------------------------------------- */ 198 199 int 200 nilfs_write(void *v) 201 { 202 struct vop_write_args /* { 203 struct vnode *a_vp; 204 struct uio *a_uio; 205 int a_ioflag; 206 kauth_cred_t a_cred; 207 } */ *ap = v; 208 struct vnode *vp = ap->a_vp; 209 struct uio *uio = ap->a_uio; 210 int ioflag = ap->a_ioflag; 211 int advice = IO_ADV_DECODE(ap->a_ioflag); 212 struct uvm_object *uobj; 213 struct nilfs_node *nilfs_node = VTOI(vp); 214 uint64_t file_size; 215 vsize_t len; 216 int error, resid, extended; 217 218 DPRINTF(WRITE, ("nilfs_write called\n")); 219 220 /* can this happen? some filingsystems have this check */ 221 if (uio->uio_offset < 0) 222 return EINVAL; 223 if (uio->uio_resid == 0) 224 return 0; 225 226 /* protect against rogue programs writing raw directories or links */ 227 if ((ioflag & IO_ALTSEMANTICS) == 0) { 228 if (vp->v_type == VDIR) 229 return EISDIR; 230 /* all but regular files just give EINVAL for now */ 231 if (vp->v_type != VREG) 232 return EINVAL; 233 } 234 235 assert(nilfs_node); 236 panic("nilfs_write() called\n"); 237 238 /* remember old file size */ 239 assert(nilfs_node); 240 file_size = nilfs_rw64(nilfs_node->inode.i_size); 241 242 /* if explicitly asked to append, uio_offset can be wrong? */ 243 if (ioflag & IO_APPEND) 244 uio->uio_offset = file_size; 245 246 #if 0 247 extended = (uio->uio_offset + uio->uio_resid > file_size); 248 if (extended) { 249 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 250 file_size, uio->uio_offset + uio->uio_resid)); 251 error = nilfs_grow_node(nilfs_node, uio->uio_offset + uio->uio_resid); 252 if (error) 253 return error; 254 file_size = uio->uio_offset + uio->uio_resid; 255 } 256 #endif 257 258 /* write contents using buffercache */ 259 uobj = &vp->v_uobj; 260 resid = uio->uio_resid; 261 error = 0; 262 263 uvm_vnp_setwritesize(vp, file_size); 264 while (uio->uio_resid > 0) { 265 /* maximise length to file extremity */ 266 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 267 if (len == 0) 268 break; 269 270 /* ubc, here we come, prepare to trap */ 271 error = ubc_uiomove(uobj, uio, len, advice, 272 UBC_WRITE | UBC_VNODE_FLAGS(vp)); 273 if (error) 274 break; 275 } 276 uvm_vnp_setsize(vp, file_size); 277 278 /* mark node changed and request update */ 279 nilfs_node->i_flags |= IN_CHANGE | IN_UPDATE; 280 if (vp->v_mount->mnt_flag & MNT_RELATIME) 281 nilfs_node->i_flags |= IN_ACCESS; 282 283 /* 284 * XXX TODO FFS has code here to reset setuid & setgid when we're not 285 * the superuser as a precaution against tampering. 286 */ 287 288 /* if we wrote a thing, note write action on vnode */ 289 if (resid > uio->uio_resid) 290 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 291 292 if (error) { 293 /* bring back file size to its former size */ 294 /* take notice of its errors? */ 295 // (void) nilfs_chsize(vp, (u_quad_t) old_size, NOCRED); 296 297 /* roll back uio */ 298 uio->uio_offset -= resid - uio->uio_resid; 299 uio->uio_resid = resid; 300 } else { 301 /* if we write and we're synchronous, update node */ 302 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 303 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 304 } 305 306 return error; 307 } 308 309 310 /* --------------------------------------------------------------------- */ 311 312 /* 313 * bmap functionality that translates logical block numbers to the virtual 314 * block numbers to be stored on the vnode itself. 315 * 316 * Important alert! 317 * 318 * If runp is not NULL, the number of contiguous blocks __starting from the 319 * next block after the queried block__ will be returned in runp. 320 */ 321 322 int 323 nilfs_trivial_bmap(void *v) 324 { 325 struct vop_bmap_args /* { 326 struct vnode *a_vp; 327 daddr_t a_bn; 328 struct vnode **a_vpp; 329 daddr_t *a_bnp; 330 int *a_runp; 331 } */ *ap = v; 332 struct vnode *vp = ap->a_vp; /* our node */ 333 struct vnode **vpp = ap->a_vpp; /* return node */ 334 daddr_t *bnp = ap->a_bnp; /* translated */ 335 daddr_t bn = ap->a_bn; /* origional */ 336 int *runp = ap->a_runp; 337 struct nilfs_node *node = VTOI(vp); 338 uint64_t *l2vmap; 339 uint32_t blocksize; 340 int blks, run, error; 341 342 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 343 /* XXX could return `-1' to indicate holes/zero's */ 344 345 blocksize = node->nilfsdev->blocksize; 346 blks = MAXPHYS / blocksize; 347 348 /* get mapping memory */ 349 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 350 351 /* get virtual block numbers for the vnode's buffer span */ 352 error = nilfs_btree_nlookup(node, bn, blks, l2vmap); 353 if (error) { 354 free(l2vmap, M_TEMP); 355 return error; 356 } 357 358 /* store virtual blocks on our own vp */ 359 if (vpp) 360 *vpp = vp; 361 362 /* start at virt[0] */ 363 *bnp = l2vmap[0]; 364 365 /* get runlength */ 366 run = 1; 367 while ((run < blks) && (l2vmap[run] == *bnp + run)) 368 run++; 369 run--; /* see comment at start of function */ 370 371 /* set runlength */ 372 if (runp) 373 *runp = run; 374 375 DPRINTF(TRANSLATE, ("\tstart %"PRIu64" -> %"PRIu64" run %d\n", 376 bn, *bnp, run)); 377 378 /* mark not translated on virtual block number 0 */ 379 if (*bnp == 0) 380 *bnp = -1; 381 382 /* return success */ 383 free(l2vmap, M_TEMP); 384 return 0; 385 } 386 387 /* --------------------------------------------------------------------- */ 388 389 static void 390 nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 391 { 392 struct nilfs_device *nilfsdev = node->nilfsdev; 393 struct buf *nbp; 394 uint64_t *l2vmap, *v2pmap; 395 uint64_t from, blks; 396 uint32_t blocksize, buf_offset; 397 uint8_t *buf_pos; 398 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 399 int i, error; 400 401 /* 402 * Translate all the block sectors into a series of buffers to read 403 * asynchronously from the nilfs device. Note that this lookup may 404 * induce readin's too. 405 */ 406 407 blocksize = nilfsdev->blocksize; 408 409 from = bp->b_blkno; 410 blks = bp->b_bcount / blocksize; 411 412 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 413 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 414 415 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 416 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 417 418 /* get mapping memory */ 419 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 420 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 421 422 /* get virtual block numbers for the vnode's buffer span */ 423 for (i = 0; i < blks; i++) 424 l2vmap[i] = from + i; 425 426 /* translate virtual block numbers to physical block numbers */ 427 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 428 if (error) 429 goto out; 430 431 /* issue translated blocks */ 432 bp->b_resid = bp->b_bcount; 433 for (i = 0; i < blks; i++) { 434 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 435 "%"PRIu64" -> %"PRIu64"\n", 436 node->ino, i, l2vmap[i], v2pmap[i])); 437 438 buf_offset = i * blocksize; 439 buf_pos = (uint8_t *) bp->b_data + buf_offset; 440 441 /* note virtual block 0 marks not mapped */ 442 if (l2vmap[i] == 0) { 443 memset(buf_pos, 0, blocksize); 444 nestiobuf_done(bp, blocksize, 0); 445 continue; 446 } 447 448 /* nest iobuf */ 449 nbp = getiobuf(NULL, true); 450 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 451 KASSERT(nbp->b_vp == node->vnode); 452 /* nbp is B_ASYNC */ 453 454 nbp->b_lblkno = i; 455 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 456 nbp->b_rawblkno = nbp->b_blkno; 457 458 VOP_STRATEGY(nilfsdev->devvp, nbp); 459 } 460 461 if ((bp->b_flags & B_ASYNC) == 0) 462 biowait(bp); 463 464 out: 465 free(l2vmap, M_TEMP); 466 free(v2pmap, M_TEMP); 467 if (error) { 468 bp->b_error = EIO; 469 biodone(bp); 470 } 471 } 472 473 474 static void 475 nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 476 { 477 /* TODO pass on to segment collector */ 478 panic("nilfs_strategy writing called\n"); 479 } 480 481 482 int 483 nilfs_vfsstrategy(void *v) 484 { 485 struct vop_strategy_args /* { 486 struct vnode *a_vp; 487 struct buf *a_bp; 488 } */ *ap = v; 489 struct vnode *vp = ap->a_vp; 490 struct buf *bp = ap->a_bp; 491 struct nilfs_node *node = VTOI(vp); 492 493 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 494 495 /* check if we ought to be here */ 496 if (vp->v_type == VBLK || vp->v_type == VCHR) 497 panic("nilfs_strategy: spec"); 498 499 /* translate if needed and pass on */ 500 if (bp->b_flags & B_READ) { 501 nilfs_read_filebuf(node, bp); 502 return bp->b_error; 503 } 504 505 /* send to segment collector */ 506 nilfs_write_filebuf(node, bp); 507 return bp->b_error; 508 } 509 510 /* --------------------------------------------------------------------- */ 511 512 int 513 nilfs_readdir(void *v) 514 { 515 struct vop_readdir_args /* { 516 struct vnode *a_vp; 517 struct uio *a_uio; 518 kauth_cred_t a_cred; 519 int *a_eofflag; 520 off_t **a_cookies; 521 int *a_ncookies; 522 } */ *ap = v; 523 struct uio *uio = ap->a_uio; 524 struct vnode *vp = ap->a_vp; 525 struct nilfs_node *node = VTOI(vp); 526 struct nilfs_dir_entry *ndirent; 527 struct dirent dirent; 528 struct buf *bp; 529 uint64_t file_size, diroffset, transoffset, blkoff; 530 uint64_t blocknr; 531 uint32_t blocksize = node->nilfsdev->blocksize; 532 uint8_t *pos, name_len; 533 int error; 534 535 DPRINTF(READDIR, ("nilfs_readdir called\n")); 536 537 if (vp->v_type != VDIR) 538 return ENOTDIR; 539 540 file_size = nilfs_rw64(node->inode.i_size); 541 542 /* we are called just as long as we keep on pushing data in */ 543 error = 0; 544 if ((uio->uio_offset < file_size) && 545 (uio->uio_resid >= sizeof(struct dirent))) { 546 diroffset = uio->uio_offset; 547 transoffset = diroffset; 548 549 blocknr = diroffset / blocksize; 550 blkoff = diroffset % blocksize; 551 error = nilfs_bread(node, blocknr, 0, &bp); 552 if (error) 553 return EIO; 554 while (diroffset < file_size) { 555 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 556 diroffset)); 557 if (blkoff >= blocksize) { 558 blkoff = 0; blocknr++; 559 brelse(bp, BC_AGE); 560 error = nilfs_bread(node, blocknr, 0, &bp); 561 if (error) 562 return EIO; 563 } 564 565 /* read in one dirent */ 566 pos = (uint8_t *) bp->b_data + blkoff; 567 ndirent = (struct nilfs_dir_entry *) pos; 568 569 name_len = ndirent->name_len; 570 memset(&dirent, 0, sizeof(struct dirent)); 571 dirent.d_fileno = nilfs_rw64(ndirent->inode); 572 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 573 dirent.d_namlen = name_len; 574 strncpy(dirent.d_name, ndirent->name, name_len); 575 dirent.d_reclen = _DIRENT_SIZE(&dirent); 576 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 577 name_len, dirent.d_name)); 578 579 /* 580 * If there isn't enough space in the uio to return a 581 * whole dirent, break off read 582 */ 583 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 584 break; 585 586 /* transfer */ 587 if (name_len) 588 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 589 590 /* advance */ 591 diroffset += nilfs_rw16(ndirent->rec_len); 592 blkoff += nilfs_rw16(ndirent->rec_len); 593 594 /* remember the last entry we transferred */ 595 transoffset = diroffset; 596 } 597 brelse(bp, BC_AGE); 598 599 /* pass on last transfered offset */ 600 uio->uio_offset = transoffset; 601 } 602 603 if (ap->a_eofflag) 604 *ap->a_eofflag = (uio->uio_offset >= file_size); 605 606 return error; 607 } 608 609 /* --------------------------------------------------------------------- */ 610 611 int 612 nilfs_lookup(void *v) 613 { 614 struct vop_lookup_v2_args /* { 615 struct vnode *a_dvp; 616 struct vnode **a_vpp; 617 struct componentname *a_cnp; 618 } */ *ap = v; 619 struct vnode *dvp = ap->a_dvp; 620 struct vnode **vpp = ap->a_vpp; 621 struct componentname *cnp = ap->a_cnp; 622 struct mount *mp = dvp->v_mount; 623 uint64_t ino; 624 const char *name; 625 int namelen, nameiop, islastcn, mounted_ro; 626 int vnodetp; 627 int error, found; 628 629 *vpp = NULL; 630 631 DPRINTF(LOOKUP, ("nilfs_lookup called\n")); 632 633 /* simplify/clarification flags */ 634 nameiop = cnp->cn_nameiop; 635 islastcn = cnp->cn_flags & ISLASTCN; 636 mounted_ro = mp->mnt_flag & MNT_RDONLY; 637 638 /* check exec/dirread permissions first */ 639 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 640 if (error) 641 return error; 642 643 DPRINTF(LOOKUP, ("\taccess ok\n")); 644 645 /* 646 * If requesting a modify on the last path element on a read-only 647 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 648 */ 649 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 650 return EROFS; 651 652 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 653 cnp->cn_nameptr)); 654 /* look in the namecache */ 655 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 656 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 657 return *vpp == NULLVP ? ENOENT : 0; 658 } 659 660 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 661 662 /* 663 * Obviously, the file is not (anymore) in the namecache, we have to 664 * search for it. There are three basic cases: '.', '..' and others. 665 * 666 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 667 */ 668 error = 0; 669 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 670 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 671 /* special case 1 '.' */ 672 vref(dvp); 673 *vpp = dvp; 674 /* done */ 675 } else if (cnp->cn_flags & ISDOTDOT) { 676 /* special case 2 '..' */ 677 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 678 679 /* get our node */ 680 name = ".."; 681 namelen = 2; 682 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 683 &ino, &found); 684 if (error) 685 goto out; 686 if (!found) 687 error = ENOENT; 688 689 if (error == 0) { 690 DPRINTF(LOOKUP, ("\tfound '..'\n")); 691 /* try to create/reuse the node */ 692 error = vcache_get(mp, &ino, sizeof(ino), vpp); 693 694 if (!error) { 695 DPRINTF(LOOKUP, 696 ("\tnode retrieved/created OK\n")); 697 } 698 } 699 } else { 700 DPRINTF(LOOKUP, ("\tlookup file\n")); 701 /* all other files */ 702 /* lookup filename in the directory returning its inode */ 703 name = cnp->cn_nameptr; 704 namelen = cnp->cn_namelen; 705 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 706 &ino, &found); 707 if (error) 708 goto out; 709 if (!found) { 710 DPRINTF(LOOKUP, ("\tNOT found\n")); 711 /* 712 * UGH, didn't find name. If we're creating or 713 * renaming on the last name this is OK and we ought 714 * to return EJUSTRETURN if its allowed to be created. 715 */ 716 error = ENOENT; 717 if (islastcn && 718 (nameiop == CREATE || nameiop == RENAME)) 719 error = 0; 720 if (!error) { 721 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 722 if (!error) { 723 error = EJUSTRETURN; 724 } 725 } 726 /* done */ 727 } else { 728 /* try to create/reuse the node */ 729 error = vcache_get(mp, &ino, sizeof(ino), vpp); 730 if (!error) { 731 /* 732 * If we are not at the last path component 733 * and found a non-directory or non-link entry 734 * (which may itself be pointing to a 735 * directory), raise an error. 736 */ 737 vnodetp = (*vpp)->v_type; 738 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 739 if (!islastcn) { 740 vrele(*vpp); 741 *vpp = NULL; 742 error = ENOTDIR; 743 } 744 } 745 746 } 747 } 748 } 749 750 out: 751 /* 752 * Store result in the cache if requested. If we are creating a file, 753 * the file might not be found and thus putting it into the namecache 754 * might be seen as negative caching. 755 */ 756 if (error == 0 && nameiop != CREATE) 757 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 758 cnp->cn_flags); 759 760 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returing error %d\n", error)); 761 762 if (error) 763 return error; 764 return 0; 765 } 766 767 /* --------------------------------------------------------------------- */ 768 769 static void 770 nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 771 { 772 ts->tv_sec = ctime; 773 ts->tv_nsec = 0; 774 } 775 776 777 int 778 nilfs_getattr(void *v) 779 { 780 struct vop_getattr_args /* { 781 struct vnode *a_vp; 782 struct vattr *a_vap; 783 kauth_cred_t a_cred; 784 struct lwp *a_l; 785 } */ *ap = v; 786 struct vnode *vp = ap->a_vp; 787 struct vattr *vap = ap->a_vap; 788 struct nilfs_node *node = VTOI(vp); 789 struct nilfs_inode *inode = &node->inode; 790 791 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 792 793 /* basic info */ 794 vattr_null(vap); 795 vap->va_type = vp->v_type; 796 vap->va_mode = nilfs_rw16(inode->i_mode) & ALLPERMS; 797 vap->va_nlink = nilfs_rw16(inode->i_links_count); 798 vap->va_uid = nilfs_rw32(inode->i_uid); 799 vap->va_gid = nilfs_rw32(inode->i_gid); 800 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 801 vap->va_fileid = node->ino; 802 vap->va_size = nilfs_rw64(inode->i_size); 803 vap->va_blocksize = node->nilfsdev->blocksize; 804 805 /* times */ 806 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 807 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 808 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 809 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 810 811 vap->va_gen = nilfs_rw32(inode->i_generation); 812 vap->va_flags = 0; /* vattr flags */ 813 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 814 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 815 vap->va_vaflags = 0; /* XXX chflags flags */ 816 817 return 0; 818 } 819 820 /* --------------------------------------------------------------------- */ 821 822 #if 0 823 static int 824 nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 825 kauth_cred_t cred) 826 { 827 return EINVAL; 828 } 829 830 831 static int 832 nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 833 { 834 835 return EINVAL; 836 } 837 838 839 /* exported */ 840 int 841 nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 842 { 843 return EINVAL; 844 } 845 846 847 static int 848 nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 849 { 850 return EINVAL; 851 } 852 853 854 static int 855 nilfs_chtimes(struct vnode *vp, 856 struct timespec *atime, struct timespec *mtime, 857 struct timespec *birthtime, int setattrflags, 858 kauth_cred_t cred) 859 { 860 return EINVAL; 861 } 862 #endif 863 864 865 int 866 nilfs_setattr(void *v) 867 { 868 struct vop_setattr_args /* { 869 struct vnode *a_vp; 870 struct vattr *a_vap; 871 kauth_cred_t a_cred; 872 struct lwp *a_l; 873 } */ *ap = v; 874 struct vnode *vp = ap->a_vp; 875 876 vp = vp; 877 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 878 return EINVAL; 879 } 880 881 /* --------------------------------------------------------------------- */ 882 883 /* 884 * Return POSIX pathconf information for NILFS file systems. 885 */ 886 int 887 nilfs_pathconf(void *v) 888 { 889 struct vop_pathconf_args /* { 890 struct vnode *a_vp; 891 int a_name; 892 register_t *a_retval; 893 } */ *ap = v; 894 uint32_t bits; 895 896 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 897 898 switch (ap->a_name) { 899 case _PC_LINK_MAX: 900 *ap->a_retval = (1<<16)-1; /* 16 bits */ 901 return 0; 902 case _PC_NAME_MAX: 903 *ap->a_retval = NILFS_MAXNAMLEN; 904 return 0; 905 case _PC_PATH_MAX: 906 *ap->a_retval = PATH_MAX; 907 return 0; 908 case _PC_PIPE_BUF: 909 *ap->a_retval = PIPE_BUF; 910 return 0; 911 case _PC_CHOWN_RESTRICTED: 912 *ap->a_retval = 1; 913 return 0; 914 case _PC_NO_TRUNC: 915 *ap->a_retval = 1; 916 return 0; 917 case _PC_SYNC_IO: 918 *ap->a_retval = 0; /* synchronised is off for performance */ 919 return 0; 920 case _PC_FILESIZEBITS: 921 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 922 bits = 64; /* XXX ought to deliver 65 */ 923 #if 0 924 if (nilfs_node) 925 bits = 64 * vp->v_mount->mnt_dev_bshift; 926 #endif 927 *ap->a_retval = bits; 928 return 0; 929 default: 930 return genfs_pathconf(ap); 931 } 932 } 933 934 935 /* --------------------------------------------------------------------- */ 936 937 int 938 nilfs_open(void *v) 939 { 940 struct vop_open_args /* { 941 struct vnode *a_vp; 942 int a_mode; 943 kauth_cred_t a_cred; 944 struct proc *a_p; 945 } */ *ap = v; 946 int flags; 947 948 DPRINTF(VFSCALL, ("nilfs_open called\n")); 949 950 /* 951 * Files marked append-only must be opened for appending. 952 */ 953 flags = 0; 954 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 955 return (EPERM); 956 957 return 0; 958 } 959 960 961 /* --------------------------------------------------------------------- */ 962 963 int 964 nilfs_close(void *v) 965 { 966 struct vop_close_args /* { 967 struct vnode *a_vp; 968 int a_fflag; 969 kauth_cred_t a_cred; 970 struct proc *a_p; 971 } */ *ap = v; 972 struct vnode *vp = ap->a_vp; 973 struct nilfs_node *nilfs_node = VTOI(vp); 974 975 DPRINTF(VFSCALL, ("nilfs_close called\n")); 976 nilfs_node = nilfs_node; /* shut up gcc */ 977 978 mutex_enter(vp->v_interlock); 979 if (vrefcnt(vp) > 1) 980 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 981 mutex_exit(vp->v_interlock); 982 983 return 0; 984 } 985 986 987 /* --------------------------------------------------------------------- */ 988 989 static int 990 nilfs_check_possible(struct vnode *vp, struct vattr *vap, accmode_t accmode) 991 { 992 int flags; 993 994 /* check if we are allowed to write */ 995 switch (vap->va_type) { 996 case VDIR: 997 case VLNK: 998 case VREG: 999 /* 1000 * normal nodes: check if we're on a read-only mounted 1001 * filingsystem and bomb out if we're trying to write. 1002 */ 1003 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1004 return EROFS; 1005 break; 1006 case VBLK: 1007 case VCHR: 1008 case VSOCK: 1009 case VFIFO: 1010 /* 1011 * special nodes: even on read-only mounted filingsystems 1012 * these are allowed to be written to if permissions allow. 1013 */ 1014 break; 1015 default: 1016 /* no idea what this is */ 1017 return EINVAL; 1018 } 1019 1020 /* noone may write immutable files */ 1021 /* TODO: get chflags(2) flags */ 1022 flags = 0; 1023 if ((accmode & VWRITE) && (flags & IMMUTABLE)) 1024 return EPERM; 1025 1026 return 0; 1027 } 1028 1029 static int 1030 nilfs_check_permitted(struct vnode *vp, struct vattr *vap, accmode_t accmode, 1031 kauth_cred_t cred) 1032 { 1033 1034 /* ask the generic genfs_can_access to advice on security */ 1035 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 1036 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp, cred, 1037 vap->va_uid, vap->va_gid, vap->va_mode, NULL, accmode)); 1038 } 1039 1040 int 1041 nilfs_access(void *v) 1042 { 1043 struct vop_access_args /* { 1044 struct vnode *a_vp; 1045 accmode_t a_accmode; 1046 kauth_cred_t a_cred; 1047 struct proc *a_p; 1048 } */ *ap = v; 1049 struct vnode *vp = ap->a_vp; 1050 accmode_t accmode = ap->a_accmode; 1051 kauth_cred_t cred = ap->a_cred; 1052 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1053 struct vattr vap; 1054 int error; 1055 1056 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1057 1058 error = VOP_GETATTR(vp, &vap, NULL); 1059 if (error) 1060 return error; 1061 1062 error = nilfs_check_possible(vp, &vap, accmode); 1063 if (error) 1064 return error; 1065 1066 error = nilfs_check_permitted(vp, &vap, accmode, cred); 1067 1068 return error; 1069 } 1070 1071 /* --------------------------------------------------------------------- */ 1072 1073 int 1074 nilfs_create(void *v) 1075 { 1076 struct vop_create_v3_args /* { 1077 struct vnode *a_dvp; 1078 struct vnode **a_vpp; 1079 struct componentname *a_cnp; 1080 struct vattr *a_vap; 1081 } */ *ap = v; 1082 struct vnode *dvp = ap->a_dvp; 1083 struct vnode **vpp = ap->a_vpp; 1084 struct vattr *vap = ap->a_vap; 1085 struct componentname *cnp = ap->a_cnp; 1086 int error; 1087 1088 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1089 error = nilfs_create_node(dvp, vpp, vap, cnp); 1090 1091 return error; 1092 } 1093 1094 /* --------------------------------------------------------------------- */ 1095 1096 int 1097 nilfs_mknod(void *v) 1098 { 1099 struct vop_mknod_v3_args /* { 1100 struct vnode *a_dvp; 1101 struct vnode **a_vpp; 1102 struct componentname *a_cnp; 1103 struct vattr *a_vap; 1104 } */ *ap = v; 1105 struct vnode *dvp = ap->a_dvp; 1106 struct vnode **vpp = ap->a_vpp; 1107 struct vattr *vap = ap->a_vap; 1108 struct componentname *cnp = ap->a_cnp; 1109 int error; 1110 1111 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1112 error = nilfs_create_node(dvp, vpp, vap, cnp); 1113 1114 return error; 1115 } 1116 1117 /* --------------------------------------------------------------------- */ 1118 1119 int 1120 nilfs_mkdir(void *v) 1121 { 1122 struct vop_mkdir_v3_args /* { 1123 struct vnode *a_dvp; 1124 struct vnode **a_vpp; 1125 struct componentname *a_cnp; 1126 struct vattr *a_vap; 1127 } */ *ap = v; 1128 struct vnode *dvp = ap->a_dvp; 1129 struct vnode **vpp = ap->a_vpp; 1130 struct vattr *vap = ap->a_vap; 1131 struct componentname *cnp = ap->a_cnp; 1132 int error; 1133 1134 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1135 error = nilfs_create_node(dvp, vpp, vap, cnp); 1136 1137 return error; 1138 } 1139 1140 /* --------------------------------------------------------------------- */ 1141 1142 static int 1143 nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1144 { 1145 struct nilfs_node *nilfs_node, *dir_node; 1146 struct vattr vap; 1147 int error; 1148 1149 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1150 KASSERT(dvp != vp); 1151 KASSERT(vp->v_type != VDIR); 1152 KASSERT(dvp->v_mount == vp->v_mount); 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 VOP_UNLOCK(vp); 1166 return error; 1167 } 1168 1169 /* check link count overflow */ 1170 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1171 VOP_UNLOCK(vp); 1172 return EMLINK; 1173 } 1174 1175 error = nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, 1176 &vap, cnp); 1177 if (error) 1178 VOP_UNLOCK(vp); 1179 return error; 1180 } 1181 1182 int 1183 nilfs_link(void *v) 1184 { 1185 struct vop_link_v2_args /* { 1186 struct vnode *a_dvp; 1187 struct vnode *a_vp; 1188 struct componentname *a_cnp; 1189 } */ *ap = v; 1190 struct vnode *dvp = ap->a_dvp; 1191 struct vnode *vp = ap->a_vp; 1192 struct componentname *cnp = ap->a_cnp; 1193 int error; 1194 1195 error = nilfs_do_link(dvp, vp, cnp); 1196 if (error) 1197 VOP_ABORTOP(dvp, cnp); 1198 1199 VN_KNOTE(vp, NOTE_LINK); 1200 VN_KNOTE(dvp, NOTE_WRITE); 1201 1202 return error; 1203 } 1204 1205 /* --------------------------------------------------------------------- */ 1206 1207 static int 1208 nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1209 { 1210 return EROFS; 1211 } 1212 1213 1214 int 1215 nilfs_symlink(void *v) 1216 { 1217 struct vop_symlink_v3_args /* { 1218 struct vnode *a_dvp; 1219 struct vnode **a_vpp; 1220 struct componentname *a_cnp; 1221 struct vattr *a_vap; 1222 char *a_target; 1223 } */ *ap = v; 1224 struct vnode *dvp = ap->a_dvp; 1225 struct vnode **vpp = ap->a_vpp; 1226 struct vattr *vap = ap->a_vap; 1227 struct componentname *cnp = ap->a_cnp; 1228 struct nilfs_node *dir_node; 1229 struct nilfs_node *nilfs_node; 1230 int error; 1231 1232 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1233 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1234 error = nilfs_create_node(dvp, vpp, vap, cnp); 1235 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1236 if (!error) { 1237 dir_node = VTOI(dvp); 1238 nilfs_node = VTOI(*vpp); 1239 KASSERT(nilfs_node); 1240 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1241 if (error) { 1242 /* remove node */ 1243 nilfs_shrink_node(nilfs_node, 0); 1244 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1245 } 1246 } 1247 return error; 1248 } 1249 1250 /* --------------------------------------------------------------------- */ 1251 1252 int 1253 nilfs_readlink(void *v) 1254 { 1255 struct vop_readlink_args /* { 1256 struct vnode *a_vp; 1257 struct uio *a_uio; 1258 kauth_cred_t a_cred; 1259 } */ *ap = v; 1260 #if 0 1261 struct vnode *vp = ap->a_vp; 1262 struct uio *uio = ap->a_uio; 1263 kauth_cred_t cred = ap->a_cred; 1264 struct nilfs_node *nilfs_node; 1265 struct pathcomp pathcomp; 1266 struct vattr vattr; 1267 uint8_t *pathbuf, *targetbuf, *tmpname; 1268 uint8_t *pathpos, *targetpos; 1269 char *mntonname; 1270 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1271 int first, error; 1272 #endif 1273 ap = ap; 1274 1275 DPRINTF(VFSCALL, ("nilfs_readlink called\n")); 1276 1277 return EROFS; 1278 } 1279 1280 /* --------------------------------------------------------------------- */ 1281 1282 /* note: i tried to follow the logics of the tmpfs rename code */ 1283 int 1284 nilfs_rename(void *v) 1285 { 1286 struct vop_rename_args /* { 1287 struct vnode *a_fdvp; 1288 struct vnode *a_fvp; 1289 struct componentname *a_fcnp; 1290 struct vnode *a_tdvp; 1291 struct vnode *a_tvp; 1292 struct componentname *a_tcnp; 1293 } */ *ap = v; 1294 struct vnode *tvp = ap->a_tvp; 1295 struct vnode *tdvp = ap->a_tdvp; 1296 struct vnode *fvp = ap->a_fvp; 1297 struct vnode *fdvp = ap->a_fdvp; 1298 struct componentname *tcnp = ap->a_tcnp; 1299 struct componentname *fcnp = ap->a_fcnp; 1300 struct nilfs_node *fnode, *fdnode, *tnode, *tdnode; 1301 struct vattr fvap, tvap; 1302 int error; 1303 1304 DPRINTF(VFSCALL, ("nilfs_rename called\n")); 1305 1306 /* disallow cross-device renames */ 1307 if (fvp->v_mount != tdvp->v_mount || 1308 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1309 error = EXDEV; 1310 goto out_unlocked; 1311 } 1312 1313 fnode = VTOI(fvp); 1314 fdnode = VTOI(fdvp); 1315 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1316 tdnode = VTOI(tdvp); 1317 1318 /* lock our source dir */ 1319 if (fdnode != tdnode) { 1320 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1321 if (error != 0) 1322 goto out_unlocked; 1323 } 1324 1325 /* get info about the node to be moved */ 1326 vn_lock(fvp, LK_SHARED | LK_RETRY); 1327 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1328 VOP_UNLOCK(fvp); 1329 KASSERT(error == 0); 1330 1331 /* check when to delete the old already existing entry */ 1332 if (tvp) { 1333 /* get info about the node to be moved to */ 1334 error = VOP_GETATTR(tvp, &tvap, FSCRED); 1335 KASSERT(error == 0); 1336 1337 /* if both dirs, make sure the destination is empty */ 1338 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1339 if (tvap.va_nlink > 2) { 1340 error = ENOTEMPTY; 1341 goto out; 1342 } 1343 } 1344 /* if moving dir, make sure destination is dir too */ 1345 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1346 error = ENOTDIR; 1347 goto out; 1348 } 1349 /* if we're moving a non-directory, make sure dest is no dir */ 1350 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1351 error = EISDIR; 1352 goto out; 1353 } 1354 } 1355 1356 /* dont allow renaming directories acros directory for now */ 1357 if (fdnode != tdnode) { 1358 if (fvp->v_type == VDIR) { 1359 error = EINVAL; 1360 goto out; 1361 } 1362 } 1363 1364 /* remove existing entry if present */ 1365 if (tvp) 1366 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1367 1368 /* create new directory entry for the node */ 1369 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1370 if (error) 1371 goto out; 1372 1373 /* unlink old directory entry for the node, if failing, unattach new */ 1374 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1375 if (error) 1376 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1377 1378 out: 1379 if (fdnode != tdnode) 1380 VOP_UNLOCK(fdvp); 1381 1382 out_unlocked: 1383 VOP_ABORTOP(tdvp, tcnp); 1384 if (tdvp == tvp) 1385 vrele(tdvp); 1386 else 1387 vput(tdvp); 1388 if (tvp) 1389 vput(tvp); 1390 VOP_ABORTOP(fdvp, fcnp); 1391 1392 /* release source nodes. */ 1393 vrele(fdvp); 1394 vrele(fvp); 1395 1396 return error; 1397 } 1398 1399 /* --------------------------------------------------------------------- */ 1400 1401 int 1402 nilfs_remove(void *v) 1403 { 1404 struct vop_remove_v2_args /* { 1405 struct vnode *a_dvp; 1406 struct vnode *a_vp; 1407 struct componentname *a_cnp; 1408 } */ *ap = v; 1409 struct vnode *dvp = ap->a_dvp; 1410 struct vnode *vp = ap->a_vp; 1411 struct componentname *cnp = ap->a_cnp; 1412 struct nilfs_node *dir_node = VTOI(dvp); 1413 struct nilfs_node *nilfs_node = VTOI(vp); 1414 struct nilfs_mount *ump = dir_node->ump; 1415 int error; 1416 1417 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1418 if (vp->v_type != VDIR) { 1419 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1420 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1421 } else { 1422 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1423 error = EPERM; 1424 } 1425 1426 if (error == 0) { 1427 VN_KNOTE(vp, NOTE_DELETE); 1428 VN_KNOTE(dvp, NOTE_WRITE); 1429 } 1430 1431 if (dvp == vp) 1432 vrele(vp); 1433 else 1434 vput(vp); 1435 1436 return error; 1437 } 1438 1439 /* --------------------------------------------------------------------- */ 1440 1441 int 1442 nilfs_rmdir(void *v) 1443 { 1444 struct vop_rmdir_v2_args /* { 1445 struct vnode *a_dvp; 1446 struct vnode *a_vp; 1447 struct componentname *a_cnp; 1448 } */ *ap = v; 1449 struct vnode *vp = ap->a_vp; 1450 struct vnode *dvp = ap->a_dvp; 1451 struct componentname *cnp = ap->a_cnp; 1452 struct nilfs_node *dir_node = VTOI(dvp); 1453 struct nilfs_node *nilfs_node = VTOI(vp); 1454 struct nilfs_mount *ump = dir_node->ump; 1455 int refcnt, error; 1456 1457 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1458 1459 /* don't allow '.' to be deleted */ 1460 if (dir_node == nilfs_node) { 1461 vrele(vp); 1462 return EINVAL; 1463 } 1464 1465 /* check to see if the directory is empty */ 1466 error = 0; 1467 refcnt = 2; /* XXX */ 1468 if (refcnt > 1) { 1469 /* NOT empty */ 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 /* put the node and exit */ 1484 vput(vp); 1485 1486 return error; 1487 } 1488 1489 /* --------------------------------------------------------------------- */ 1490 1491 int 1492 nilfs_fsync(void *v) 1493 { 1494 struct vop_fsync_args /* { 1495 struct vnode *a_vp; 1496 kauth_cred_t a_cred; 1497 int a_flags; 1498 off_t offlo; 1499 off_t offhi; 1500 struct proc *a_p; 1501 } */ *ap = v; 1502 struct vnode *vp = ap->a_vp; 1503 // struct nilfs_node *nilfs_node = VTOI(vp); 1504 // int error, flags, wait; 1505 1506 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1507 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1508 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1509 1510 vp = vp; 1511 return 0; 1512 } 1513 1514 /* --------------------------------------------------------------------- */ 1515 1516 int 1517 nilfs_advlock(void *v) 1518 { 1519 struct vop_advlock_args /* { 1520 struct vnode *a_vp; 1521 void *a_id; 1522 int a_op; 1523 struct flock *a_fl; 1524 int a_flags; 1525 } */ *ap = v; 1526 struct vnode *vp = ap->a_vp; 1527 struct nilfs_node *nilfs_node = VTOI(vp); 1528 uint64_t file_size; 1529 1530 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1531 1532 assert(nilfs_node); 1533 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1534 1535 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1536 } 1537 1538 /* --------------------------------------------------------------------- */ 1539 1540 1541 /* Global vfs vnode data structures for nilfss */ 1542 int (**nilfs_vnodeop_p) __P((void *)); 1543 1544 const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1545 { &vop_default_desc, vn_default_error }, 1546 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1547 { &vop_create_desc, nilfs_create }, /* create */ 1548 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1549 { &vop_open_desc, nilfs_open }, /* open */ 1550 { &vop_close_desc, nilfs_close }, /* close */ 1551 { &vop_access_desc, nilfs_access }, /* access */ 1552 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 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_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 1558 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 1559 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1560 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1561 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1562 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1563 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1564 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1565 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1566 { &vop_seek_desc, genfs_seek }, /* seek */ 1567 { &vop_remove_desc, nilfs_remove }, /* remove */ 1568 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1569 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1570 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1571 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1572 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1573 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1574 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1575 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1576 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1577 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1578 { &vop_lock_desc, genfs_lock }, /* lock */ 1579 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1580 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1581 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1582 /* { &vop_print_desc, nilfs_print }, */ /* print */ 1583 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1584 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1585 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1586 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1587 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1588 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1589 { NULL, NULL } 1590 }; 1591 1592 1593 const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1594 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1595 }; 1596 1597