nilfs_vnops.c revision 1.20
1/* $NetBSD: nilfs_vnops.c,v 1.20 2012/11/05 17:27:37 dholland 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 1.20 2012/11/05 17:27:37 dholland 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 */ 65extern int prtactive; 66 67/* implementations of vnode functions; table follows at end */ 68/* --------------------------------------------------------------------- */ 69 70int 71nilfs_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 100int 101nilfs_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 129int 130nilfs_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 200int 201nilfs_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"); 238return 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 320int 321nilfs_trivial_bmap(void *v) 322{ 323 struct vop_bmap_args /* { 324 struct vnode *a_vp; 325 daddr_t a_bn; 326 struct vnode **a_vpp; 327 daddr_t *a_bnp; 328 int *a_runp; 329 } */ *ap = v; 330 struct vnode *vp = ap->a_vp; /* our node */ 331 struct vnode **vpp = ap->a_vpp; /* return node */ 332 daddr_t *bnp = ap->a_bnp; /* translated */ 333 daddr_t bn = ap->a_bn; /* origional */ 334 int *runp = ap->a_runp; 335 struct nilfs_node *node = VTOI(vp); 336 uint64_t *l2vmap; 337 uint32_t blocksize; 338 int blks, run, error; 339 340 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 341 /* XXX could return `-1' to indicate holes/zero's */ 342 343 blocksize = node->nilfsdev->blocksize; 344 blks = MAXPHYS / blocksize; 345 346 /* get mapping memory */ 347 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 348 349 /* get virtual block numbers for the vnode's buffer span */ 350 error = nilfs_btree_nlookup(node, bn, blks, l2vmap); 351 if (error) { 352 free(l2vmap, M_TEMP); 353 return error; 354 } 355 356 /* store virtual blocks on our own vp */ 357 if (vpp) 358 *vpp = vp; 359 360 /* start at virt[0] */ 361 *bnp = l2vmap[0]; 362 363 /* get runlength */ 364 run = 1; 365 while ((run < blks) && (l2vmap[run] == *bnp + run)) 366 run++; 367 368 /* set runlength */ 369 if (runp) 370 *runp = run; 371 372 DPRINTF(TRANSLATE, ("\tstart %"PRIu64" -> %"PRIu64" run %d\n", 373 bn, *bnp, run)); 374 375 /* mark not translated on virtual block number 0 */ 376 if (*bnp == 0) 377 *bnp = -1; 378 379 /* return success */ 380 free(l2vmap, M_TEMP); 381 return 0; 382} 383 384/* --------------------------------------------------------------------- */ 385 386static void 387nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 388{ 389 struct nilfs_device *nilfsdev = node->nilfsdev; 390 struct buf *nbp; 391 uint64_t *l2vmap, *v2pmap; 392 uint64_t from, blks; 393 uint32_t blocksize, buf_offset; 394 uint8_t *buf_pos; 395 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 396 int i, error; 397 398 /* 399 * Translate all the block sectors into a series of buffers to read 400 * asynchronously from the nilfs device. Note that this lookup may 401 * induce readin's too. 402 */ 403 404 blocksize = nilfsdev->blocksize; 405 406 from = bp->b_blkno; 407 blks = bp->b_bcount / blocksize; 408 409 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 410 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 411 412 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 413 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 414 415 /* get mapping memory */ 416 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 417 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 418 419 /* get virtual block numbers for the vnode's buffer span */ 420 for (i = 0; i < blks; i++) 421 l2vmap[i] = from + i; 422 423 /* translate virtual block numbers to physical block numbers */ 424 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 425 if (error) 426 goto out; 427 428 /* issue translated blocks */ 429 bp->b_resid = bp->b_bcount; 430 for (i = 0; i < blks; i++) { 431 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 432 "%"PRIu64" -> %"PRIu64"\n", 433 node->ino, i, l2vmap[i], v2pmap[i])); 434 435 buf_offset = i * blocksize; 436 buf_pos = (uint8_t *) bp->b_data + buf_offset; 437 438 /* note virtual block 0 marks not mapped */ 439 if (l2vmap[i] == 0) { 440 memset(buf_pos, 0, blocksize); 441 nestiobuf_done(bp, blocksize, 0); 442 continue; 443 } 444 445 /* nest iobuf */ 446 nbp = getiobuf(NULL, true); 447 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 448 KASSERT(nbp->b_vp == node->vnode); 449 /* nbp is B_ASYNC */ 450 451 nbp->b_lblkno = i; 452 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 453 nbp->b_rawblkno = nbp->b_blkno; 454 455 VOP_STRATEGY(nilfsdev->devvp, nbp); 456 } 457 458 if ((bp->b_flags & B_ASYNC) == 0) 459 biowait(bp); 460 461out: 462 free(l2vmap, M_TEMP); 463 free(v2pmap, M_TEMP); 464 if (error) { 465 bp->b_error = EIO; 466 biodone(bp); 467 } 468} 469 470 471static void 472nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 473{ 474 /* TODO pass on to segment collector */ 475 panic("nilfs_strategy writing called\n"); 476} 477 478 479int 480nilfs_vfsstrategy(void *v) 481{ 482 struct vop_strategy_args /* { 483 struct vnode *a_vp; 484 struct buf *a_bp; 485 } */ *ap = v; 486 struct vnode *vp = ap->a_vp; 487 struct buf *bp = ap->a_bp; 488 struct nilfs_node *node = VTOI(vp); 489 490 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 491 492 /* check if we ought to be here */ 493 if (vp->v_type == VBLK || vp->v_type == VCHR) 494 panic("nilfs_strategy: spec"); 495 496 /* translate if needed and pass on */ 497 if (bp->b_flags & B_READ) { 498 nilfs_read_filebuf(node, bp); 499 return bp->b_error; 500 } 501 502 /* send to segment collector */ 503 nilfs_write_filebuf(node, bp); 504 return bp->b_error; 505} 506 507/* --------------------------------------------------------------------- */ 508 509int 510nilfs_readdir(void *v) 511{ 512 struct vop_readdir_args /* { 513 struct vnode *a_vp; 514 struct uio *a_uio; 515 kauth_cred_t a_cred; 516 int *a_eofflag; 517 off_t **a_cookies; 518 int *a_ncookies; 519 } */ *ap = v; 520 struct uio *uio = ap->a_uio; 521 struct vnode *vp = ap->a_vp; 522 struct nilfs_node *node = VTOI(vp); 523 struct nilfs_dir_entry *ndirent; 524 struct dirent dirent; 525 struct buf *bp; 526 uint64_t file_size, diroffset, transoffset, blkoff; 527 uint64_t blocknr; 528 uint32_t blocksize = node->nilfsdev->blocksize; 529 uint8_t *pos, name_len; 530 int error; 531 532 DPRINTF(READDIR, ("nilfs_readdir called\n")); 533 534 if (vp->v_type != VDIR) 535 return ENOTDIR; 536 537 file_size = nilfs_rw64(node->inode.i_size); 538 539 /* we are called just as long as we keep on pushing data in */ 540 error = 0; 541 if ((uio->uio_offset < file_size) && 542 (uio->uio_resid >= sizeof(struct dirent))) { 543 diroffset = uio->uio_offset; 544 transoffset = diroffset; 545 546 blocknr = diroffset / blocksize; 547 blkoff = diroffset % blocksize; 548 error = nilfs_bread(node, blocknr, NOCRED, 0, &bp); 549 if (error) 550 return EIO; 551 while (diroffset < file_size) { 552 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 553 diroffset)); 554 if (blkoff >= blocksize) { 555 blkoff = 0; blocknr++; 556 brelse(bp, BC_AGE); 557 error = nilfs_bread(node, blocknr, NOCRED, 0, 558 &bp); 559 if (error) 560 return EIO; 561 } 562 563 /* read in one dirent */ 564 pos = (uint8_t *) bp->b_data + blkoff; 565 ndirent = (struct nilfs_dir_entry *) pos; 566 567 name_len = ndirent->name_len; 568 memset(&dirent, 0, sizeof(struct dirent)); 569 dirent.d_fileno = nilfs_rw64(ndirent->inode); 570 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 571 dirent.d_namlen = name_len; 572 strncpy(dirent.d_name, ndirent->name, name_len); 573 dirent.d_reclen = _DIRENT_SIZE(&dirent); 574 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 575 name_len, dirent.d_name)); 576 577 /* 578 * If there isn't enough space in the uio to return a 579 * whole dirent, break off read 580 */ 581 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 582 break; 583 584 /* transfer */ 585 if (name_len) 586 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 587 588 /* advance */ 589 diroffset += nilfs_rw16(ndirent->rec_len); 590 blkoff += nilfs_rw16(ndirent->rec_len); 591 592 /* remember the last entry we transfered */ 593 transoffset = diroffset; 594 } 595 brelse(bp, BC_AGE); 596 597 /* pass on last transfered offset */ 598 uio->uio_offset = transoffset; 599 } 600 601 if (ap->a_eofflag) 602 *ap->a_eofflag = (uio->uio_offset >= file_size); 603 604 return error; 605} 606 607/* --------------------------------------------------------------------- */ 608 609int 610nilfs_lookup(void *v) 611{ 612 struct vop_lookup_args /* { 613 struct vnode *a_dvp; 614 struct vnode **a_vpp; 615 struct componentname *a_cnp; 616 } */ *ap = v; 617 struct vnode *dvp = ap->a_dvp; 618 struct vnode **vpp = ap->a_vpp; 619 struct componentname *cnp = ap->a_cnp; 620 struct nilfs_node *dir_node, *res_node; 621 struct nilfs_mount *ump; 622 uint64_t ino; 623 const char *name; 624 int namelen, nameiop, islastcn, mounted_ro; 625 int vnodetp; 626 int error, found; 627 628 dir_node = VTOI(dvp); 629 ump = dir_node->ump; 630 *vpp = NULL; 631 632 DPRINTF(LOOKUP, ("nilfs_lookup called\n")); 633 634 /* simplify/clarification flags */ 635 nameiop = cnp->cn_nameiop; 636 islastcn = cnp->cn_flags & ISLASTCN; 637 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 638 639 /* check exec/dirread permissions first */ 640 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 641 if (error) 642 return error; 643 644 DPRINTF(LOOKUP, ("\taccess ok\n")); 645 646 /* 647 * If requesting a modify on the last path element on a read-only 648 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 649 */ 650 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 651 return EROFS; 652 653 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 654 cnp->cn_nameptr)); 655 /* look in the namecache */ 656 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 657 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 658 return *vpp == NULLVP ? ENOENT : 0; 659 } 660 661 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 662 663 /* 664 * Obviously, the file is not (anymore) in the namecache, we have to 665 * search for it. There are three basic cases: '.', '..' and others. 666 * 667 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 668 */ 669 error = 0; 670 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 671 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 672 /* special case 1 '.' */ 673 vref(dvp); 674 *vpp = dvp; 675 /* done */ 676 } else if (cnp->cn_flags & ISDOTDOT) { 677 /* special case 2 '..' */ 678 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 679 680 /* get our node */ 681 name = ".."; 682 namelen = 2; 683 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 684 &ino, &found); 685 if (error) 686 goto out; 687 if (!found) 688 error = ENOENT; 689 690 /* first unlock parent */ 691 VOP_UNLOCK(dvp); 692 693 if (error == 0) { 694 DPRINTF(LOOKUP, ("\tfound '..'\n")); 695 /* try to create/reuse the node */ 696 error = nilfs_get_node(ump, ino, &res_node); 697 698 if (!error) { 699 DPRINTF(LOOKUP, 700 ("\tnode retrieved/created OK\n")); 701 *vpp = res_node->vnode; 702 } 703 } 704 705 /* try to relock parent */ 706 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 707 } else { 708 DPRINTF(LOOKUP, ("\tlookup file\n")); 709 /* all other files */ 710 /* lookup filename in the directory returning its inode */ 711 name = cnp->cn_nameptr; 712 namelen = cnp->cn_namelen; 713 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 714 &ino, &found); 715 if (error) 716 goto out; 717 if (!found) { 718 DPRINTF(LOOKUP, ("\tNOT found\n")); 719 /* 720 * UGH, didn't find name. If we're creating or 721 * renaming on the last name this is OK and we ought 722 * to return EJUSTRETURN if its allowed to be created. 723 */ 724 error = ENOENT; 725 if (islastcn && 726 (nameiop == CREATE || nameiop == RENAME)) 727 error = 0; 728 if (!error) { 729 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 730 if (!error) { 731 error = EJUSTRETURN; 732 } 733 } 734 /* done */ 735 } else { 736 /* try to create/reuse the node */ 737 error = nilfs_get_node(ump, ino, &res_node); 738 if (!error) { 739 /* 740 * If we are not at the last path component 741 * and found a non-directory or non-link entry 742 * (which may itself be pointing to a 743 * directory), raise an error. 744 */ 745 vnodetp = res_node->vnode->v_type; 746 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 747 if (!islastcn) 748 error = ENOTDIR; 749 } 750 751 } 752 if (!error) { 753 *vpp = res_node->vnode; 754 } 755 } 756 } 757 758out: 759 /* 760 * Store result in the cache if requested. If we are creating a file, 761 * the file might not be found and thus putting it into the namecache 762 * might be seen as negative caching. 763 */ 764 if (nameiop != CREATE) 765 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 766 cnp->cn_flags); 767 768 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returing error %d\n", error)); 769 770 return error; 771} 772 773/* --------------------------------------------------------------------- */ 774 775static void 776nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 777{ 778 ts->tv_sec = ctime; 779 ts->tv_nsec = 0; 780} 781 782 783int 784nilfs_getattr(void *v) 785{ 786 struct vop_getattr_args /* { 787 struct vnode *a_vp; 788 struct vattr *a_vap; 789 kauth_cred_t a_cred; 790 struct lwp *a_l; 791 } */ *ap = v; 792 struct vnode *vp = ap->a_vp; 793 struct vattr *vap = ap->a_vap; 794 struct nilfs_node *node = VTOI(vp); 795 struct nilfs_inode *inode = &node->inode; 796 797 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 798 799 /* basic info */ 800 vattr_null(vap); 801 vap->va_type = vp->v_type; 802 vap->va_mode = nilfs_rw16(inode->i_mode); /* XXX same? */ 803 vap->va_nlink = nilfs_rw16(inode->i_links_count); 804 vap->va_uid = nilfs_rw32(inode->i_uid); 805 vap->va_gid = nilfs_rw32(inode->i_gid); 806 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 807 vap->va_fileid = node->ino; 808 vap->va_size = nilfs_rw64(inode->i_size); 809 vap->va_blocksize = node->nilfsdev->blocksize; 810 811 /* times */ 812 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 813 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 814 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 815 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 816 817 vap->va_gen = nilfs_rw32(inode->i_generation); 818 vap->va_flags = 0; /* vattr flags */ 819 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 820 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 821 vap->va_vaflags = 0; /* XXX chflags flags */ 822 823 return 0; 824} 825 826/* --------------------------------------------------------------------- */ 827 828#if 0 829static int 830nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 831 kauth_cred_t cred) 832{ 833 return EINVAL; 834} 835 836 837static int 838nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 839{ 840 841 return EINVAL; 842} 843 844 845/* exported */ 846int 847nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 848{ 849 return EINVAL; 850} 851 852 853static int 854nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 855{ 856 return EINVAL; 857} 858 859 860static int 861nilfs_chtimes(struct vnode *vp, 862 struct timespec *atime, struct timespec *mtime, 863 struct timespec *birthtime, int setattrflags, 864 kauth_cred_t cred) 865{ 866 return EINVAL; 867} 868#endif 869 870 871int 872nilfs_setattr(void *v) 873{ 874 struct vop_setattr_args /* { 875 struct vnode *a_vp; 876 struct vattr *a_vap; 877 kauth_cred_t a_cred; 878 struct lwp *a_l; 879 } */ *ap = v; 880 struct vnode *vp = ap->a_vp; 881 882 vp = vp; 883 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 884 return EINVAL; 885} 886 887/* --------------------------------------------------------------------- */ 888 889/* 890 * Return POSIX pathconf information for NILFS file systems. 891 */ 892int 893nilfs_pathconf(void *v) 894{ 895 struct vop_pathconf_args /* { 896 struct vnode *a_vp; 897 int a_name; 898 register_t *a_retval; 899 } */ *ap = v; 900 uint32_t bits; 901 902 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 903 904 switch (ap->a_name) { 905 case _PC_LINK_MAX: 906 *ap->a_retval = (1<<16)-1; /* 16 bits */ 907 return 0; 908 case _PC_NAME_MAX: 909 *ap->a_retval = NILFS_MAXNAMLEN; 910 return 0; 911 case _PC_PATH_MAX: 912 *ap->a_retval = PATH_MAX; 913 return 0; 914 case _PC_PIPE_BUF: 915 *ap->a_retval = PIPE_BUF; 916 return 0; 917 case _PC_CHOWN_RESTRICTED: 918 *ap->a_retval = 1; 919 return 0; 920 case _PC_NO_TRUNC: 921 *ap->a_retval = 1; 922 return 0; 923 case _PC_SYNC_IO: 924 *ap->a_retval = 0; /* synchronised is off for performance */ 925 return 0; 926 case _PC_FILESIZEBITS: 927 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 928 bits = 64; /* XXX ought to deliver 65 */ 929#if 0 930 if (nilfs_node) 931 bits = 64 * vp->v_mount->mnt_dev_bshift; 932#endif 933 *ap->a_retval = bits; 934 return 0; 935 } 936 937 return EINVAL; 938} 939 940 941/* --------------------------------------------------------------------- */ 942 943int 944nilfs_open(void *v) 945{ 946 struct vop_open_args /* { 947 struct vnode *a_vp; 948 int a_mode; 949 kauth_cred_t a_cred; 950 struct proc *a_p; 951 } */ *ap = v; 952 int flags; 953 954 DPRINTF(VFSCALL, ("nilfs_open called\n")); 955 956 /* 957 * Files marked append-only must be opened for appending. 958 */ 959 flags = 0; 960 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 961 return (EPERM); 962 963 return 0; 964} 965 966 967/* --------------------------------------------------------------------- */ 968 969int 970nilfs_close(void *v) 971{ 972 struct vop_close_args /* { 973 struct vnode *a_vp; 974 int a_fflag; 975 kauth_cred_t a_cred; 976 struct proc *a_p; 977 } */ *ap = v; 978 struct vnode *vp = ap->a_vp; 979 struct nilfs_node *nilfs_node = VTOI(vp); 980 981 DPRINTF(VFSCALL, ("nilfs_close called\n")); 982 nilfs_node = nilfs_node; /* shut up gcc */ 983 984 mutex_enter(vp->v_interlock); 985 if (vp->v_usecount > 1) 986 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 987 mutex_exit(vp->v_interlock); 988 989 return 0; 990} 991 992 993/* --------------------------------------------------------------------- */ 994 995static int 996nilfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 997{ 998 int flags; 999 1000 /* check if we are allowed to write */ 1001 switch (vap->va_type) { 1002 case VDIR: 1003 case VLNK: 1004 case VREG: 1005 /* 1006 * normal nodes: check if we're on a read-only mounted 1007 * filingsystem and bomb out if we're trying to write. 1008 */ 1009 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1010 return EROFS; 1011 break; 1012 case VBLK: 1013 case VCHR: 1014 case VSOCK: 1015 case VFIFO: 1016 /* 1017 * special nodes: even on read-only mounted filingsystems 1018 * these are allowed to be written to if permissions allow. 1019 */ 1020 break; 1021 default: 1022 /* no idea what this is */ 1023 return EINVAL; 1024 } 1025 1026 /* noone may write immutable files */ 1027 /* TODO: get chflags(2) flags */ 1028 flags = 0; 1029 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1030 return EPERM; 1031 1032 return 0; 1033} 1034 1035static int 1036nilfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1037 kauth_cred_t cred) 1038{ 1039 1040 /* ask the generic genfs_can_access to advice on security */ 1041 return kauth_authorize_vnode(cred, kauth_access_action(mode, 1042 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1043 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1044} 1045 1046int 1047nilfs_access(void *v) 1048{ 1049 struct vop_access_args /* { 1050 struct vnode *a_vp; 1051 int a_mode; 1052 kauth_cred_t a_cred; 1053 struct proc *a_p; 1054 } */ *ap = v; 1055 struct vnode *vp = ap->a_vp; 1056 mode_t mode = ap->a_mode; 1057 kauth_cred_t cred = ap->a_cred; 1058 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1059 struct vattr vap; 1060 int error; 1061 1062 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1063 1064 error = VOP_GETATTR(vp, &vap, NULL); 1065 if (error) 1066 return error; 1067 1068 error = nilfs_check_possible(vp, &vap, mode); 1069 if (error) 1070 return error; 1071 1072 error = nilfs_check_permitted(vp, &vap, mode, cred); 1073 1074 return error; 1075} 1076 1077/* --------------------------------------------------------------------- */ 1078 1079int 1080nilfs_create(void *v) 1081{ 1082 struct vop_create_args /* { 1083 struct vnode *a_dvp; 1084 struct vnode **a_vpp; 1085 struct componentname *a_cnp; 1086 struct vattr *a_vap; 1087 } */ *ap = v; 1088 struct vnode *dvp = ap->a_dvp; 1089 struct vnode **vpp = ap->a_vpp; 1090 struct vattr *vap = ap->a_vap; 1091 struct componentname *cnp = ap->a_cnp; 1092 int error; 1093 1094 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1095 error = nilfs_create_node(dvp, vpp, vap, cnp); 1096 1097 vput(dvp); 1098 return error; 1099} 1100 1101/* --------------------------------------------------------------------- */ 1102 1103int 1104nilfs_mknod(void *v) 1105{ 1106 struct vop_mknod_args /* { 1107 struct vnode *a_dvp; 1108 struct vnode **a_vpp; 1109 struct componentname *a_cnp; 1110 struct vattr *a_vap; 1111 } */ *ap = v; 1112 struct vnode *dvp = ap->a_dvp; 1113 struct vnode **vpp = ap->a_vpp; 1114 struct vattr *vap = ap->a_vap; 1115 struct componentname *cnp = ap->a_cnp; 1116 int error; 1117 1118 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1119 error = nilfs_create_node(dvp, vpp, vap, cnp); 1120 1121 vput(dvp); 1122 return error; 1123} 1124 1125/* --------------------------------------------------------------------- */ 1126 1127int 1128nilfs_mkdir(void *v) 1129{ 1130 struct vop_mkdir_args /* { 1131 struct vnode *a_dvp; 1132 struct vnode **a_vpp; 1133 struct componentname *a_cnp; 1134 struct vattr *a_vap; 1135 } */ *ap = v; 1136 struct vnode *dvp = ap->a_dvp; 1137 struct vnode **vpp = ap->a_vpp; 1138 struct vattr *vap = ap->a_vap; 1139 struct componentname *cnp = ap->a_cnp; 1140 int error; 1141 1142 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1143 error = nilfs_create_node(dvp, vpp, vap, cnp); 1144 1145 vput(dvp); 1146 return error; 1147} 1148 1149/* --------------------------------------------------------------------- */ 1150 1151static int 1152nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1153{ 1154 struct nilfs_node *nilfs_node, *dir_node; 1155 struct vattr vap; 1156 int error; 1157 1158 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1159 KASSERT(dvp != vp); 1160 KASSERT(vp->v_type != VDIR); 1161 KASSERT(dvp->v_mount == vp->v_mount); 1162 1163 /* lock node */ 1164 error = vn_lock(vp, LK_EXCLUSIVE); 1165 if (error) 1166 return error; 1167 1168 /* get attributes */ 1169 dir_node = VTOI(dvp); 1170 nilfs_node = VTOI(vp); 1171 1172 error = VOP_GETATTR(vp, &vap, FSCRED); 1173 if (error) { 1174 VOP_UNLOCK(vp); 1175 return error; 1176 } 1177 1178 /* check link count overflow */ 1179 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1180 VOP_UNLOCK(vp); 1181 return EMLINK; 1182 } 1183 1184 error = nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, 1185 &vap, cnp); 1186 if (error) 1187 VOP_UNLOCK(vp); 1188 return error; 1189} 1190 1191int 1192nilfs_link(void *v) 1193{ 1194 struct vop_link_args /* { 1195 struct vnode *a_dvp; 1196 struct vnode *a_vp; 1197 struct componentname *a_cnp; 1198 } */ *ap = v; 1199 struct vnode *dvp = ap->a_dvp; 1200 struct vnode *vp = ap->a_vp; 1201 struct componentname *cnp = ap->a_cnp; 1202 int error; 1203 1204 error = nilfs_do_link(dvp, vp, cnp); 1205 if (error) 1206 VOP_ABORTOP(dvp, cnp); 1207 1208 VN_KNOTE(vp, NOTE_LINK); 1209 VN_KNOTE(dvp, NOTE_WRITE); 1210 vput(dvp); 1211 1212 return error; 1213} 1214 1215/* --------------------------------------------------------------------- */ 1216 1217static int 1218nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1219{ 1220 return EROFS; 1221} 1222 1223 1224int 1225nilfs_symlink(void *v) 1226{ 1227 struct vop_symlink_args /* { 1228 struct vnode *a_dvp; 1229 struct vnode **a_vpp; 1230 struct componentname *a_cnp; 1231 struct vattr *a_vap; 1232 char *a_target; 1233 } */ *ap = v; 1234 struct vnode *dvp = ap->a_dvp; 1235 struct vnode **vpp = ap->a_vpp; 1236 struct vattr *vap = ap->a_vap; 1237 struct componentname *cnp = ap->a_cnp; 1238 struct nilfs_node *dir_node; 1239 struct nilfs_node *nilfs_node; 1240 int error; 1241 1242 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1243 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1244 error = nilfs_create_node(dvp, vpp, vap, cnp); 1245 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1246 if (!error) { 1247 dir_node = VTOI(dvp); 1248 nilfs_node = VTOI(*vpp); 1249 KASSERT(nilfs_node); 1250 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1251 if (error) { 1252 /* remove node */ 1253 nilfs_shrink_node(nilfs_node, 0); 1254 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1255 } 1256 } 1257 vput(dvp); 1258 return error; 1259} 1260 1261/* --------------------------------------------------------------------- */ 1262 1263int 1264nilfs_readlink(void *v) 1265{ 1266 struct vop_readlink_args /* { 1267 struct vnode *a_vp; 1268 struct uio *a_uio; 1269 kauth_cred_t a_cred; 1270 } */ *ap = v; 1271#if 0 1272 struct vnode *vp = ap->a_vp; 1273 struct uio *uio = ap->a_uio; 1274 kauth_cred_t cred = ap->a_cred; 1275 struct nilfs_node *nilfs_node; 1276 struct pathcomp pathcomp; 1277 struct vattr vattr; 1278 uint8_t *pathbuf, *targetbuf, *tmpname; 1279 uint8_t *pathpos, *targetpos; 1280 char *mntonname; 1281 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1282 int first, error; 1283#endif 1284 ap = ap; 1285 1286 DPRINTF(VFSCALL, ("nilfs_readlink called\n")); 1287 1288 return EROFS; 1289} 1290 1291/* --------------------------------------------------------------------- */ 1292 1293/* note: i tried to follow the logics of the tmpfs rename code */ 1294int 1295nilfs_rename(void *v) 1296{ 1297 struct vop_rename_args /* { 1298 struct vnode *a_fdvp; 1299 struct vnode *a_fvp; 1300 struct componentname *a_fcnp; 1301 struct vnode *a_tdvp; 1302 struct vnode *a_tvp; 1303 struct componentname *a_tcnp; 1304 } */ *ap = v; 1305 struct vnode *tvp = ap->a_tvp; 1306 struct vnode *tdvp = ap->a_tdvp; 1307 struct vnode *fvp = ap->a_fvp; 1308 struct vnode *fdvp = ap->a_fdvp; 1309 struct componentname *tcnp = ap->a_tcnp; 1310 struct componentname *fcnp = ap->a_fcnp; 1311 struct nilfs_node *fnode, *fdnode, *tnode, *tdnode; 1312 struct vattr fvap, tvap; 1313 int error; 1314 1315 DPRINTF(VFSCALL, ("nilfs_rename called\n")); 1316 1317 /* disallow cross-device renames */ 1318 if (fvp->v_mount != tdvp->v_mount || 1319 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1320 error = EXDEV; 1321 goto out_unlocked; 1322 } 1323 1324 fnode = VTOI(fvp); 1325 fdnode = VTOI(fdvp); 1326 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1327 tdnode = VTOI(tdvp); 1328 1329 /* lock our source dir */ 1330 if (fdnode != tdnode) { 1331 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1332 if (error != 0) 1333 goto out_unlocked; 1334 } 1335 1336 /* get info about the node to be moved */ 1337 vn_lock(fvp, LK_SHARED | LK_RETRY); 1338 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1339 VOP_UNLOCK(fvp); 1340 KASSERT(error == 0); 1341 1342 /* check when to delete the old already existing entry */ 1343 if (tvp) { 1344 /* get info about the node to be moved to */ 1345 error = VOP_GETATTR(tvp, &tvap, FSCRED); 1346 KASSERT(error == 0); 1347 1348 /* if both dirs, make sure the destination is empty */ 1349 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1350 if (tvap.va_nlink > 2) { 1351 error = ENOTEMPTY; 1352 goto out; 1353 } 1354 } 1355 /* if moving dir, make sure destination is dir too */ 1356 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1357 error = ENOTDIR; 1358 goto out; 1359 } 1360 /* if we're moving a non-directory, make sure dest is no dir */ 1361 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1362 error = EISDIR; 1363 goto out; 1364 } 1365 } 1366 1367 /* dont allow renaming directories acros directory for now */ 1368 if (fdnode != tdnode) { 1369 if (fvp->v_type == VDIR) { 1370 error = EINVAL; 1371 goto out; 1372 } 1373 } 1374 1375 /* remove existing entry if present */ 1376 if (tvp) 1377 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1378 1379 /* create new directory entry for the node */ 1380 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1381 if (error) 1382 goto out; 1383 1384 /* unlink old directory entry for the node, if failing, unattach new */ 1385 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1386 if (error) 1387 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1388 1389out: 1390 if (fdnode != tdnode) 1391 VOP_UNLOCK(fdvp); 1392 1393out_unlocked: 1394 VOP_ABORTOP(tdvp, tcnp); 1395 if (tdvp == tvp) 1396 vrele(tdvp); 1397 else 1398 vput(tdvp); 1399 if (tvp) 1400 vput(tvp); 1401 VOP_ABORTOP(fdvp, fcnp); 1402 1403 /* release source nodes. */ 1404 vrele(fdvp); 1405 vrele(fvp); 1406 1407 return error; 1408} 1409 1410/* --------------------------------------------------------------------- */ 1411 1412int 1413nilfs_remove(void *v) 1414{ 1415 struct vop_remove_args /* { 1416 struct vnode *a_dvp; 1417 struct vnode *a_vp; 1418 struct componentname *a_cnp; 1419 } */ *ap = v; 1420 struct vnode *dvp = ap->a_dvp; 1421 struct vnode *vp = ap->a_vp; 1422 struct componentname *cnp = ap->a_cnp; 1423 struct nilfs_node *dir_node = VTOI(dvp); 1424 struct nilfs_node *nilfs_node = VTOI(vp); 1425 struct nilfs_mount *ump = dir_node->ump; 1426 int error; 1427 1428 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1429 if (vp->v_type != VDIR) { 1430 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1431 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1432 } else { 1433 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1434 error = EPERM; 1435 } 1436 1437 if (error == 0) { 1438 VN_KNOTE(vp, NOTE_DELETE); 1439 VN_KNOTE(dvp, NOTE_WRITE); 1440 } 1441 1442 if (dvp == vp) 1443 vrele(vp); 1444 else 1445 vput(vp); 1446 vput(dvp); 1447 1448 return error; 1449} 1450 1451/* --------------------------------------------------------------------- */ 1452 1453int 1454nilfs_rmdir(void *v) 1455{ 1456 struct vop_rmdir_args /* { 1457 struct vnode *a_dvp; 1458 struct vnode *a_vp; 1459 struct componentname *a_cnp; 1460 } */ *ap = v; 1461 struct vnode *vp = ap->a_vp; 1462 struct vnode *dvp = ap->a_dvp; 1463 struct componentname *cnp = ap->a_cnp; 1464 struct nilfs_node *dir_node = VTOI(dvp); 1465 struct nilfs_node *nilfs_node = VTOI(vp); 1466 struct nilfs_mount *ump = dir_node->ump; 1467 int refcnt, error; 1468 1469 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1470 1471 /* don't allow '.' to be deleted */ 1472 if (dir_node == nilfs_node) { 1473 vrele(dvp); 1474 vput(vp); 1475 return EINVAL; 1476 } 1477 1478 /* check to see if the directory is empty */ 1479 error = 0; 1480 refcnt = 2; /* XXX */ 1481 if (refcnt > 1) { 1482 /* NOT empty */ 1483 vput(dvp); 1484 vput(vp); 1485 return ENOTEMPTY; 1486 } 1487 1488 /* detach the node from the directory */ 1489 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1490 if (error == 0) { 1491 cache_purge(vp); 1492// cache_purge(dvp); /* XXX from msdosfs, why? */ 1493 VN_KNOTE(vp, NOTE_DELETE); 1494 } 1495 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1496 1497 /* unput the nodes and exit */ 1498 vput(dvp); 1499 vput(vp); 1500 1501 return error; 1502} 1503 1504/* --------------------------------------------------------------------- */ 1505 1506int 1507nilfs_fsync(void *v) 1508{ 1509 struct vop_fsync_args /* { 1510 struct vnode *a_vp; 1511 kauth_cred_t a_cred; 1512 int a_flags; 1513 off_t offlo; 1514 off_t offhi; 1515 struct proc *a_p; 1516 } */ *ap = v; 1517 struct vnode *vp = ap->a_vp; 1518// struct nilfs_node *nilfs_node = VTOI(vp); 1519// int error, flags, wait; 1520 1521 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1522 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1523 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1524 1525 vp = vp; 1526 return 0; 1527} 1528 1529/* --------------------------------------------------------------------- */ 1530 1531int 1532nilfs_advlock(void *v) 1533{ 1534 struct vop_advlock_args /* { 1535 struct vnode *a_vp; 1536 void *a_id; 1537 int a_op; 1538 struct flock *a_fl; 1539 int a_flags; 1540 } */ *ap = v; 1541 struct vnode *vp = ap->a_vp; 1542 struct nilfs_node *nilfs_node = VTOI(vp); 1543 uint64_t file_size; 1544 1545 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1546 1547 assert(nilfs_node); 1548 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1549 1550 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1551} 1552 1553/* --------------------------------------------------------------------- */ 1554 1555 1556/* Global vfs vnode data structures for nilfss */ 1557int (**nilfs_vnodeop_p) __P((void *)); 1558 1559const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1560 { &vop_default_desc, vn_default_error }, 1561 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1562 { &vop_create_desc, nilfs_create }, /* create */ 1563 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1564 { &vop_open_desc, nilfs_open }, /* open */ 1565 { &vop_close_desc, nilfs_close }, /* close */ 1566 { &vop_access_desc, nilfs_access }, /* access */ 1567 { &vop_getattr_desc, nilfs_getattr }, /* getattr */ 1568 { &vop_setattr_desc, nilfs_setattr }, /* setattr */ /* TODO chflags */ 1569 { &vop_read_desc, nilfs_read }, /* read */ 1570 { &vop_write_desc, nilfs_write }, /* write */ /* WRITE */ 1571 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1572 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1573 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1574 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1575 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1576 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1577 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1578 { &vop_seek_desc, genfs_seek }, /* seek */ 1579 { &vop_remove_desc, nilfs_remove }, /* remove */ 1580 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1581 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1582 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1583 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1584 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1585 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1586 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1587 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1588 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1589 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1590 { &vop_lock_desc, genfs_lock }, /* lock */ 1591 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1592 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1593 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1594/* { &vop_print_desc, nilfs_print }, */ /* print */ 1595 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1596 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1597 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1598 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1599 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1600 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1601 { NULL, NULL } 1602}; 1603 1604 1605const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1606 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1607}; 1608 1609