1/* $NetBSD: nilfs_vnops.c,v 1.48 2022/10/07 22:33:42 andvar 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 1.48 2022/10/07 22:33:42 andvar 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 67int 68nilfs_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 96int 97nilfs_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 128int 129nilfs_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 199int 200nilfs_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; 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 (error) { 289 /* bring back file size to its former size */ 290 /* take notice of its errors? */ 291// (void) nilfs_chsize(vp, (u_quad_t) old_size, NOCRED); 292 293 /* roll back uio */ 294 uio->uio_offset -= resid - uio->uio_resid; 295 uio->uio_resid = resid; 296 } else { 297 /* if we write and we're synchronous, update node */ 298 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 299 error = nilfs_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 300 } 301 302 return error; 303} 304 305 306/* --------------------------------------------------------------------- */ 307 308/* 309 * bmap functionality that translates logical block numbers to the virtual 310 * block numbers to be stored on the vnode itself. 311 * 312 * Important alert! 313 * 314 * If runp is not NULL, the number of contiguous blocks __starting from the 315 * next block after the queried block__ will be returned in runp. 316 */ 317 318int 319nilfs_trivial_bmap(void *v) 320{ 321 struct vop_bmap_args /* { 322 struct vnode *a_vp; 323 daddr_t a_bn; 324 struct vnode **a_vpp; 325 daddr_t *a_bnp; 326 int *a_runp; 327 } */ *ap = v; 328 struct vnode *vp = ap->a_vp; /* our node */ 329 struct vnode **vpp = ap->a_vpp; /* return node */ 330 daddr_t *bnp = ap->a_bnp; /* translated */ 331 daddr_t bn = ap->a_bn; /* original */ 332 int *runp = ap->a_runp; 333 struct nilfs_node *node = VTOI(vp); 334 uint64_t *l2vmap; 335 uint32_t blocksize; 336 int blks, run, error; 337 338 DPRINTF(TRANSLATE, ("nilfs_bmap() called\n")); 339 /* XXX could return `-1' to indicate holes/zero's */ 340 341 blocksize = node->nilfsdev->blocksize; 342 blks = MAXPHYS / blocksize; 343 344 /* get mapping memory */ 345 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 346 347 /* get virtual block numbers for the vnode's buffer span */ 348 error = nilfs_btree_nlookup(node, bn, blks, l2vmap); 349 if (error) { 350 free(l2vmap, M_TEMP); 351 return error; 352 } 353 354 /* store virtual blocks on our own vp */ 355 if (vpp) 356 *vpp = vp; 357 358 /* start at virt[0] */ 359 *bnp = l2vmap[0]; 360 361 /* get runlength */ 362 run = 1; 363 while ((run < blks) && (l2vmap[run] == *bnp + run)) 364 run++; 365 run--; /* see comment at start of function */ 366 367 /* set runlength */ 368 if (runp) 369 *runp = run; 370 371 DPRINTF(TRANSLATE, ("\tstart %"PRIu64" -> %"PRIu64" run %d\n", 372 bn, *bnp, run)); 373 374 /* mark not translated on virtual block number 0 */ 375 if (*bnp == 0) 376 *bnp = -1; 377 378 /* return success */ 379 free(l2vmap, M_TEMP); 380 return 0; 381} 382 383/* --------------------------------------------------------------------- */ 384 385static void 386nilfs_read_filebuf(struct nilfs_node *node, struct buf *bp) 387{ 388 struct nilfs_device *nilfsdev = node->nilfsdev; 389 struct buf *nbp; 390 uint64_t *l2vmap, *v2pmap; 391 uint64_t from, blks; 392 uint32_t blocksize, buf_offset; 393 uint8_t *buf_pos; 394 int blk2dev = nilfsdev->blocksize / DEV_BSIZE; 395 int i, error; 396 397 /* 398 * Translate all the block sectors into a series of buffers to read 399 * asynchronously from the nilfs device. Note that this lookup may 400 * induce readin's too. 401 */ 402 403 blocksize = nilfsdev->blocksize; 404 405 from = bp->b_blkno; 406 blks = bp->b_bcount / blocksize; 407 408 DPRINTF(READ, ("\tread in from inode %"PRIu64" blkno %"PRIu64" " 409 "+ %"PRIu64" blocks\n", node->ino, from, blks)); 410 411 DPRINTF(READ, ("\t\tblkno %"PRIu64" " 412 "+ %d bytes\n", bp->b_blkno, bp->b_bcount)); 413 414 /* get mapping memory */ 415 l2vmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 416 v2pmap = malloc(sizeof(uint64_t) * blks, M_TEMP, M_WAITOK); 417 418 /* get virtual block numbers for the vnode's buffer span */ 419 for (i = 0; i < blks; i++) 420 l2vmap[i] = from + i; 421 422 /* translate virtual block numbers to physical block numbers */ 423 error = nilfs_nvtop(node, blks, l2vmap, v2pmap); 424 if (error) 425 goto out; 426 427 /* issue translated blocks */ 428 bp->b_resid = bp->b_bcount; 429 for (i = 0; i < blks; i++) { 430 DPRINTF(READ, ("read_filebuf : ino %"PRIu64" blk %d -> " 431 "%"PRIu64" -> %"PRIu64"\n", 432 node->ino, i, l2vmap[i], v2pmap[i])); 433 434 buf_offset = i * blocksize; 435 buf_pos = (uint8_t *) bp->b_data + buf_offset; 436 437 /* note virtual block 0 marks not mapped */ 438 if (l2vmap[i] == 0) { 439 memset(buf_pos, 0, blocksize); 440 nestiobuf_done(bp, blocksize, 0); 441 continue; 442 } 443 444 /* nest iobuf */ 445 nbp = getiobuf(NULL, true); 446 nestiobuf_setup(bp, nbp, buf_offset, blocksize); 447 KASSERT(nbp->b_vp == node->vnode); 448 /* nbp is B_ASYNC */ 449 450 nbp->b_lblkno = i; 451 nbp->b_blkno = v2pmap[i] * blk2dev; /* in DEV_BSIZE */ 452 nbp->b_rawblkno = nbp->b_blkno; 453 454 VOP_STRATEGY(nilfsdev->devvp, nbp); 455 } 456 457 if ((bp->b_flags & B_ASYNC) == 0) 458 biowait(bp); 459 460out: 461 free(l2vmap, M_TEMP); 462 free(v2pmap, M_TEMP); 463 if (error) { 464 bp->b_error = EIO; 465 biodone(bp); 466 } 467} 468 469 470static void 471nilfs_write_filebuf(struct nilfs_node *node, struct buf *bp) 472{ 473 /* TODO pass on to segment collector */ 474 panic("nilfs_strategy writing called\n"); 475} 476 477 478int 479nilfs_vfsstrategy(void *v) 480{ 481 struct vop_strategy_args /* { 482 struct vnode *a_vp; 483 struct buf *a_bp; 484 } */ *ap = v; 485 struct vnode *vp = ap->a_vp; 486 struct buf *bp = ap->a_bp; 487 struct nilfs_node *node = VTOI(vp); 488 489 DPRINTF(STRATEGY, ("nilfs_strategy called\n")); 490 491 /* check if we ought to be here */ 492 if (vp->v_type == VBLK || vp->v_type == VCHR) 493 panic("nilfs_strategy: spec"); 494 495 /* translate if needed and pass on */ 496 if (bp->b_flags & B_READ) { 497 nilfs_read_filebuf(node, bp); 498 return bp->b_error; 499 } 500 501 /* send to segment collector */ 502 nilfs_write_filebuf(node, bp); 503 return bp->b_error; 504} 505 506/* --------------------------------------------------------------------- */ 507 508int 509nilfs_readdir(void *v) 510{ 511 struct vop_readdir_args /* { 512 struct vnode *a_vp; 513 struct uio *a_uio; 514 kauth_cred_t a_cred; 515 int *a_eofflag; 516 off_t **a_cookies; 517 int *a_ncookies; 518 } */ *ap = v; 519 struct uio *uio = ap->a_uio; 520 struct vnode *vp = ap->a_vp; 521 struct nilfs_node *node = VTOI(vp); 522 struct nilfs_dir_entry *ndirent; 523 struct dirent dirent; 524 struct buf *bp; 525 uint64_t file_size, diroffset, transoffset, blkoff; 526 uint64_t blocknr; 527 uint32_t blocksize = node->nilfsdev->blocksize; 528 uint8_t *pos, name_len; 529 int error; 530 531 DPRINTF(READDIR, ("nilfs_readdir called\n")); 532 533 if (vp->v_type != VDIR) 534 return ENOTDIR; 535 536 file_size = nilfs_rw64(node->inode.i_size); 537 538 /* we are called just as long as we keep on pushing data in */ 539 error = 0; 540 if ((uio->uio_offset < file_size) && 541 (uio->uio_resid >= sizeof(struct dirent))) { 542 diroffset = uio->uio_offset; 543 transoffset = diroffset; 544 545 blocknr = diroffset / blocksize; 546 blkoff = diroffset % blocksize; 547 error = nilfs_bread(node, blocknr, 0, &bp); 548 if (error) 549 return EIO; 550 while (diroffset < file_size) { 551 DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n", 552 diroffset)); 553 if (blkoff >= blocksize) { 554 blkoff = 0; blocknr++; 555 brelse(bp, BC_AGE); 556 error = nilfs_bread(node, blocknr, 0, &bp); 557 if (error) 558 return EIO; 559 } 560 561 /* read in one dirent */ 562 pos = (uint8_t *) bp->b_data + blkoff; 563 ndirent = (struct nilfs_dir_entry *) pos; 564 565 name_len = ndirent->name_len; 566 memset(&dirent, 0, sizeof(struct dirent)); 567 dirent.d_fileno = nilfs_rw64(ndirent->inode); 568 dirent.d_type = ndirent->file_type; /* 1:1 ? */ 569 dirent.d_namlen = name_len; 570 strncpy(dirent.d_name, ndirent->name, name_len); 571 dirent.d_reclen = _DIRENT_SIZE(&dirent); 572 DPRINTF(READDIR, ("copying `%*.*s`\n", name_len, 573 name_len, dirent.d_name)); 574 575 /* 576 * If there isn't enough space in the uio to return a 577 * whole dirent, break off read 578 */ 579 if (uio->uio_resid < _DIRENT_SIZE(&dirent)) 580 break; 581 582 /* transfer */ 583 if (name_len) 584 uiomove(&dirent, _DIRENT_SIZE(&dirent), uio); 585 586 /* advance */ 587 diroffset += nilfs_rw16(ndirent->rec_len); 588 blkoff += nilfs_rw16(ndirent->rec_len); 589 590 /* remember the last entry we transferred */ 591 transoffset = diroffset; 592 } 593 brelse(bp, BC_AGE); 594 595 /* pass on last transferred offset */ 596 uio->uio_offset = transoffset; 597 } 598 599 if (ap->a_eofflag) 600 *ap->a_eofflag = (uio->uio_offset >= file_size); 601 602 return error; 603} 604 605/* --------------------------------------------------------------------- */ 606 607int 608nilfs_lookup(void *v) 609{ 610 struct vop_lookup_v2_args /* { 611 struct vnode *a_dvp; 612 struct vnode **a_vpp; 613 struct componentname *a_cnp; 614 } */ *ap = v; 615 struct vnode *dvp = ap->a_dvp; 616 struct vnode **vpp = ap->a_vpp; 617 struct componentname *cnp = ap->a_cnp; 618 struct mount *mp = dvp->v_mount; 619 uint64_t ino; 620 const char *name; 621 int namelen, nameiop, islastcn, mounted_ro; 622 int vnodetp; 623 int error, found; 624 625 *vpp = NULL; 626 627 DPRINTF(LOOKUP, ("nilfs_lookup called\n")); 628 629 /* simplify/clarification flags */ 630 nameiop = cnp->cn_nameiop; 631 islastcn = cnp->cn_flags & ISLASTCN; 632 mounted_ro = mp->mnt_flag & MNT_RDONLY; 633 634 /* check exec/dirread permissions first */ 635 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 636 if (error) 637 return error; 638 639 DPRINTF(LOOKUP, ("\taccess ok\n")); 640 641 /* 642 * If requesting a modify on the last path element on a read-only 643 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 644 */ 645 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 646 return EROFS; 647 648 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 649 cnp->cn_nameptr)); 650 /* look in the namecache */ 651 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 652 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 653 return *vpp == NULLVP ? ENOENT : 0; 654 } 655 656 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 657 658 /* 659 * Obviously, the file is not (anymore) in the namecache, we have to 660 * search for it. There are three basic cases: '.', '..' and others. 661 * 662 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 663 */ 664 error = 0; 665 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 666 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 667 /* special case 1 '.' */ 668 vref(dvp); 669 *vpp = dvp; 670 /* done */ 671 } else if (cnp->cn_flags & ISDOTDOT) { 672 /* special case 2 '..' */ 673 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 674 675 /* get our node */ 676 name = ".."; 677 namelen = 2; 678 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 679 &ino, &found); 680 if (error) 681 goto out; 682 if (!found) 683 error = ENOENT; 684 685 if (error == 0) { 686 DPRINTF(LOOKUP, ("\tfound '..'\n")); 687 /* try to create/reuse the node */ 688 error = vcache_get(mp, &ino, sizeof(ino), vpp); 689 690 if (!error) { 691 DPRINTF(LOOKUP, 692 ("\tnode retrieved/created OK\n")); 693 } 694 } 695 } else { 696 DPRINTF(LOOKUP, ("\tlookup file\n")); 697 /* all other files */ 698 /* lookup filename in the directory returning its inode */ 699 name = cnp->cn_nameptr; 700 namelen = cnp->cn_namelen; 701 error = nilfs_lookup_name_in_dir(dvp, name, namelen, 702 &ino, &found); 703 if (error) 704 goto out; 705 if (!found) { 706 DPRINTF(LOOKUP, ("\tNOT found\n")); 707 /* 708 * UGH, didn't find name. If we're creating or 709 * renaming on the last name this is OK and we ought 710 * to return EJUSTRETURN if its allowed to be created. 711 */ 712 error = ENOENT; 713 if (islastcn && 714 (nameiop == CREATE || nameiop == RENAME)) 715 error = 0; 716 if (!error) { 717 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 718 if (!error) { 719 error = EJUSTRETURN; 720 } 721 } 722 /* done */ 723 } else { 724 /* try to create/reuse the node */ 725 error = vcache_get(mp, &ino, sizeof(ino), vpp); 726 if (!error) { 727 /* 728 * If we are not at the last path component 729 * and found a non-directory or non-link entry 730 * (which may itself be pointing to a 731 * directory), raise an error. 732 */ 733 vnodetp = (*vpp)->v_type; 734 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 735 if (!islastcn) { 736 vrele(*vpp); 737 *vpp = NULL; 738 error = ENOTDIR; 739 } 740 } 741 742 } 743 } 744 } 745 746out: 747 /* 748 * Store result in the cache if requested. If we are creating a file, 749 * the file might not be found and thus putting it into the namecache 750 * might be seen as negative caching. 751 */ 752 if (error == 0 && nameiop != CREATE) 753 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 754 cnp->cn_flags); 755 756 DPRINTFIF(LOOKUP, error, ("nilfs_lookup returning error %d\n", error)); 757 758 if (error) 759 return error; 760 return 0; 761} 762 763/* --------------------------------------------------------------------- */ 764 765static void 766nilfs_ctime_to_timespec(struct timespec *ts, uint64_t ctime) 767{ 768 ts->tv_sec = ctime; 769 ts->tv_nsec = 0; 770} 771 772 773int 774nilfs_getattr(void *v) 775{ 776 struct vop_getattr_args /* { 777 struct vnode *a_vp; 778 struct vattr *a_vap; 779 kauth_cred_t a_cred; 780 struct lwp *a_l; 781 } */ *ap = v; 782 struct vnode *vp = ap->a_vp; 783 struct vattr *vap = ap->a_vap; 784 struct nilfs_node *node = VTOI(vp); 785 struct nilfs_inode *inode = &node->inode; 786 787 DPRINTF(VFSCALL, ("nilfs_getattr called\n")); 788 789 /* basic info */ 790 vattr_null(vap); 791 vap->va_type = vp->v_type; 792 vap->va_mode = nilfs_rw16(inode->i_mode) & ALLPERMS; 793 vap->va_nlink = nilfs_rw16(inode->i_links_count); 794 vap->va_uid = nilfs_rw32(inode->i_uid); 795 vap->va_gid = nilfs_rw32(inode->i_gid); 796 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 797 vap->va_fileid = node->ino; 798 vap->va_size = nilfs_rw64(inode->i_size); 799 vap->va_blocksize = node->nilfsdev->blocksize; 800 801 /* times */ 802 nilfs_ctime_to_timespec(&vap->va_atime, nilfs_rw64(inode->i_mtime)); 803 nilfs_ctime_to_timespec(&vap->va_mtime, nilfs_rw64(inode->i_mtime)); 804 nilfs_ctime_to_timespec(&vap->va_ctime, nilfs_rw64(inode->i_ctime)); 805 nilfs_ctime_to_timespec(&vap->va_birthtime, nilfs_rw64(inode->i_ctime)); 806 807 vap->va_gen = nilfs_rw32(inode->i_generation); 808 vap->va_flags = 0; /* vattr flags */ 809 vap->va_bytes = nilfs_rw64(inode->i_blocks) * vap->va_blocksize; 810 vap->va_filerev = vap->va_gen; /* XXX file revision? same as gen? */ 811 vap->va_vaflags = 0; /* XXX chflags flags */ 812 813 return 0; 814} 815 816/* --------------------------------------------------------------------- */ 817 818#if 0 819static int 820nilfs_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 821 kauth_cred_t cred) 822{ 823 return EINVAL; 824} 825 826 827static int 828nilfs_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 829{ 830 831 return EINVAL; 832} 833 834 835/* exported */ 836int 837nilfs_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 838{ 839 return EINVAL; 840} 841 842 843static int 844nilfs_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 845{ 846 return EINVAL; 847} 848 849 850static int 851nilfs_chtimes(struct vnode *vp, 852 struct timespec *atime, struct timespec *mtime, 853 struct timespec *birthtime, int setattrflags, 854 kauth_cred_t cred) 855{ 856 return EINVAL; 857} 858#endif 859 860 861int 862nilfs_setattr(void *v) 863{ 864 struct vop_setattr_args /* { 865 struct vnode *a_vp; 866 struct vattr *a_vap; 867 kauth_cred_t a_cred; 868 struct lwp *a_l; 869 } */ *ap = v; 870 struct vnode *vp = ap->a_vp; 871 872 vp = vp; 873 DPRINTF(VFSCALL, ("nilfs_setattr called\n")); 874 return EINVAL; 875} 876 877/* --------------------------------------------------------------------- */ 878 879/* 880 * Return POSIX pathconf information for NILFS file systems. 881 */ 882int 883nilfs_pathconf(void *v) 884{ 885 struct vop_pathconf_args /* { 886 struct vnode *a_vp; 887 int a_name; 888 register_t *a_retval; 889 } */ *ap = v; 890 uint32_t bits; 891 892 DPRINTF(VFSCALL, ("nilfs_pathconf called\n")); 893 894 switch (ap->a_name) { 895 case _PC_LINK_MAX: 896 *ap->a_retval = (1<<16)-1; /* 16 bits */ 897 return 0; 898 case _PC_NAME_MAX: 899 *ap->a_retval = NILFS_MAXNAMLEN; 900 return 0; 901 case _PC_PATH_MAX: 902 *ap->a_retval = PATH_MAX; 903 return 0; 904 case _PC_PIPE_BUF: 905 *ap->a_retval = PIPE_BUF; 906 return 0; 907 case _PC_CHOWN_RESTRICTED: 908 *ap->a_retval = 1; 909 return 0; 910 case _PC_NO_TRUNC: 911 *ap->a_retval = 1; 912 return 0; 913 case _PC_SYNC_IO: 914 *ap->a_retval = 0; /* synchronised is off for performance */ 915 return 0; 916 case _PC_FILESIZEBITS: 917 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 918 bits = 64; /* XXX ought to deliver 65 */ 919#if 0 920 if (nilfs_node) 921 bits = 64 * vp->v_mount->mnt_dev_bshift; 922#endif 923 *ap->a_retval = bits; 924 return 0; 925 default: 926 return genfs_pathconf(ap); 927 } 928} 929 930 931/* --------------------------------------------------------------------- */ 932 933int 934nilfs_open(void *v) 935{ 936 struct vop_open_args /* { 937 struct vnode *a_vp; 938 int a_mode; 939 kauth_cred_t a_cred; 940 struct proc *a_p; 941 } */ *ap = v; 942 int flags; 943 944 DPRINTF(VFSCALL, ("nilfs_open called\n")); 945 946 /* 947 * Files marked append-only must be opened for appending. 948 */ 949 flags = 0; 950 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 951 return (EPERM); 952 953 return 0; 954} 955 956 957/* --------------------------------------------------------------------- */ 958 959int 960nilfs_close(void *v) 961{ 962 struct vop_close_args /* { 963 struct vnode *a_vp; 964 int a_fflag; 965 kauth_cred_t a_cred; 966 struct proc *a_p; 967 } */ *ap = v; 968 struct vnode *vp = ap->a_vp; 969 struct nilfs_node *nilfs_node = VTOI(vp); 970 971 DPRINTF(VFSCALL, ("nilfs_close called\n")); 972 nilfs_node = nilfs_node; /* shut up gcc */ 973 974 mutex_enter(vp->v_interlock); 975 if (vrefcnt(vp) > 1) 976 nilfs_itimes(nilfs_node, NULL, NULL, NULL); 977 mutex_exit(vp->v_interlock); 978 979 return 0; 980} 981 982 983/* --------------------------------------------------------------------- */ 984 985static int 986nilfs_check_possible(struct vnode *vp, struct vattr *vap, accmode_t accmode) 987{ 988 int flags; 989 990 /* check if we are allowed to write */ 991 switch (vap->va_type) { 992 case VDIR: 993 case VLNK: 994 case VREG: 995 /* 996 * normal nodes: check if we're on a read-only mounted 997 * filingsystem and bomb out if we're trying to write. 998 */ 999 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1000 return EROFS; 1001 break; 1002 case VBLK: 1003 case VCHR: 1004 case VSOCK: 1005 case VFIFO: 1006 /* 1007 * special nodes: even on read-only mounted filingsystems 1008 * these are allowed to be written to if permissions allow. 1009 */ 1010 break; 1011 default: 1012 /* no idea what this is */ 1013 return EINVAL; 1014 } 1015 1016 /* noone may write immutable files */ 1017 /* TODO: get chflags(2) flags */ 1018 flags = 0; 1019 if ((accmode & VWRITE) && (flags & IMMUTABLE)) 1020 return EPERM; 1021 1022 return 0; 1023} 1024 1025static int 1026nilfs_check_permitted(struct vnode *vp, struct vattr *vap, accmode_t accmode, 1027 kauth_cred_t cred) 1028{ 1029 1030 /* ask the generic genfs_can_access to advice on security */ 1031 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 1032 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp, cred, 1033 vap->va_uid, vap->va_gid, vap->va_mode, NULL, accmode)); 1034} 1035 1036int 1037nilfs_access(void *v) 1038{ 1039 struct vop_access_args /* { 1040 struct vnode *a_vp; 1041 accmode_t a_accmode; 1042 kauth_cred_t a_cred; 1043 struct proc *a_p; 1044 } */ *ap = v; 1045 struct vnode *vp = ap->a_vp; 1046 accmode_t accmode = ap->a_accmode; 1047 kauth_cred_t cred = ap->a_cred; 1048 /* struct nilfs_node *nilfs_node = VTOI(vp); */ 1049 struct vattr vap; 1050 int error; 1051 1052 DPRINTF(VFSCALL, ("nilfs_access called\n")); 1053 1054 error = VOP_GETATTR(vp, &vap, NULL); 1055 if (error) 1056 return error; 1057 1058 error = nilfs_check_possible(vp, &vap, accmode); 1059 if (error) 1060 return error; 1061 1062 error = nilfs_check_permitted(vp, &vap, accmode, cred); 1063 1064 return error; 1065} 1066 1067/* --------------------------------------------------------------------- */ 1068 1069int 1070nilfs_create(void *v) 1071{ 1072 struct vop_create_v3_args /* { 1073 struct vnode *a_dvp; 1074 struct vnode **a_vpp; 1075 struct componentname *a_cnp; 1076 struct vattr *a_vap; 1077 } */ *ap = v; 1078 struct vnode *dvp = ap->a_dvp; 1079 struct vnode **vpp = ap->a_vpp; 1080 struct vattr *vap = ap->a_vap; 1081 struct componentname *cnp = ap->a_cnp; 1082 int error; 1083 1084 DPRINTF(VFSCALL, ("nilfs_create called\n")); 1085 error = nilfs_create_node(dvp, vpp, vap, cnp); 1086 1087 return error; 1088} 1089 1090/* --------------------------------------------------------------------- */ 1091 1092int 1093nilfs_mknod(void *v) 1094{ 1095 struct vop_mknod_v3_args /* { 1096 struct vnode *a_dvp; 1097 struct vnode **a_vpp; 1098 struct componentname *a_cnp; 1099 struct vattr *a_vap; 1100 } */ *ap = v; 1101 struct vnode *dvp = ap->a_dvp; 1102 struct vnode **vpp = ap->a_vpp; 1103 struct vattr *vap = ap->a_vap; 1104 struct componentname *cnp = ap->a_cnp; 1105 int error; 1106 1107 DPRINTF(VFSCALL, ("nilfs_mknod called\n")); 1108 error = nilfs_create_node(dvp, vpp, vap, cnp); 1109 1110 return error; 1111} 1112 1113/* --------------------------------------------------------------------- */ 1114 1115int 1116nilfs_mkdir(void *v) 1117{ 1118 struct vop_mkdir_v3_args /* { 1119 struct vnode *a_dvp; 1120 struct vnode **a_vpp; 1121 struct componentname *a_cnp; 1122 struct vattr *a_vap; 1123 } */ *ap = v; 1124 struct vnode *dvp = ap->a_dvp; 1125 struct vnode **vpp = ap->a_vpp; 1126 struct vattr *vap = ap->a_vap; 1127 struct componentname *cnp = ap->a_cnp; 1128 int error; 1129 1130 DPRINTF(VFSCALL, ("nilfs_mkdir called\n")); 1131 error = nilfs_create_node(dvp, vpp, vap, cnp); 1132 1133 return error; 1134} 1135 1136/* --------------------------------------------------------------------- */ 1137 1138static int 1139nilfs_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1140{ 1141 struct nilfs_node *nilfs_node, *dir_node; 1142 struct vattr vap; 1143 int error; 1144 1145 DPRINTF(VFSCALL, ("nilfs_link called\n")); 1146 KASSERT(dvp != vp); 1147 KASSERT(vp->v_type != VDIR); 1148 KASSERT(dvp->v_mount == vp->v_mount); 1149 1150 /* lock node */ 1151 error = vn_lock(vp, LK_EXCLUSIVE); 1152 if (error) 1153 return error; 1154 1155 /* get attributes */ 1156 dir_node = VTOI(dvp); 1157 nilfs_node = VTOI(vp); 1158 1159 error = VOP_GETATTR(vp, &vap, FSCRED); 1160 if (error) { 1161 VOP_UNLOCK(vp); 1162 return error; 1163 } 1164 1165 /* check link count overflow */ 1166 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1167 VOP_UNLOCK(vp); 1168 return EMLINK; 1169 } 1170 1171 error = nilfs_dir_attach(dir_node->ump, dir_node, nilfs_node, 1172 &vap, cnp); 1173 if (error) 1174 VOP_UNLOCK(vp); 1175 return error; 1176} 1177 1178int 1179nilfs_link(void *v) 1180{ 1181 struct vop_link_v2_args /* { 1182 struct vnode *a_dvp; 1183 struct vnode *a_vp; 1184 struct componentname *a_cnp; 1185 } */ *ap = v; 1186 struct vnode *dvp = ap->a_dvp; 1187 struct vnode *vp = ap->a_vp; 1188 struct componentname *cnp = ap->a_cnp; 1189 int error; 1190 1191 error = nilfs_do_link(dvp, vp, cnp); 1192 if (error) 1193 VOP_ABORTOP(dvp, cnp); 1194 1195 return error; 1196} 1197 1198/* --------------------------------------------------------------------- */ 1199 1200static int 1201nilfs_do_symlink(struct nilfs_node *nilfs_node, char *target) 1202{ 1203 return EROFS; 1204} 1205 1206 1207int 1208nilfs_symlink(void *v) 1209{ 1210 struct vop_symlink_v3_args /* { 1211 struct vnode *a_dvp; 1212 struct vnode **a_vpp; 1213 struct componentname *a_cnp; 1214 struct vattr *a_vap; 1215 char *a_target; 1216 } */ *ap = v; 1217 struct vnode *dvp = ap->a_dvp; 1218 struct vnode **vpp = ap->a_vpp; 1219 struct vattr *vap = ap->a_vap; 1220 struct componentname *cnp = ap->a_cnp; 1221 struct nilfs_node *dir_node; 1222 struct nilfs_node *nilfs_node; 1223 int error; 1224 1225 DPRINTF(VFSCALL, ("nilfs_symlink called\n")); 1226 DPRINTF(VFSCALL, ("\tlinking to `%s`\n", ap->a_target)); 1227 error = nilfs_create_node(dvp, vpp, vap, cnp); 1228 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1229 if (!error) { 1230 dir_node = VTOI(dvp); 1231 nilfs_node = VTOI(*vpp); 1232 KASSERT(nilfs_node); 1233 error = nilfs_do_symlink(nilfs_node, ap->a_target); 1234 if (error) { 1235 /* remove node */ 1236 nilfs_shrink_node(nilfs_node, 0); 1237 nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp); 1238 } 1239 } 1240 return error; 1241} 1242 1243/* --------------------------------------------------------------------- */ 1244 1245int 1246nilfs_readlink(void *v) 1247{ 1248 struct vop_readlink_args /* { 1249 struct vnode *a_vp; 1250 struct uio *a_uio; 1251 kauth_cred_t a_cred; 1252 } */ *ap = v; 1253#if 0 1254 struct vnode *vp = ap->a_vp; 1255 struct uio *uio = ap->a_uio; 1256 kauth_cred_t cred = ap->a_cred; 1257 struct nilfs_node *nilfs_node; 1258 struct pathcomp pathcomp; 1259 struct vattr vattr; 1260 uint8_t *pathbuf, *targetbuf, *tmpname; 1261 uint8_t *pathpos, *targetpos; 1262 char *mntonname; 1263 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1264 int first, error; 1265#endif 1266 ap = ap; 1267 1268 DPRINTF(VFSCALL, ("nilfs_readlink called\n")); 1269 1270 return EROFS; 1271} 1272 1273/* --------------------------------------------------------------------- */ 1274 1275/* note: i tried to follow the logic of the tmpfs rename code */ 1276int 1277nilfs_rename(void *v) 1278{ 1279 struct vop_rename_args /* { 1280 struct vnode *a_fdvp; 1281 struct vnode *a_fvp; 1282 struct componentname *a_fcnp; 1283 struct vnode *a_tdvp; 1284 struct vnode *a_tvp; 1285 struct componentname *a_tcnp; 1286 } */ *ap = v; 1287 struct vnode *tvp = ap->a_tvp; 1288 struct vnode *tdvp = ap->a_tdvp; 1289 struct vnode *fvp = ap->a_fvp; 1290 struct vnode *fdvp = ap->a_fdvp; 1291 struct componentname *tcnp = ap->a_tcnp; 1292 struct componentname *fcnp = ap->a_fcnp; 1293 struct nilfs_node *fnode, *fdnode, *tnode, *tdnode; 1294 struct vattr fvap, tvap; 1295 int error; 1296 1297 DPRINTF(VFSCALL, ("nilfs_rename called\n")); 1298 1299 /* disallow cross-device renames */ 1300 if (fvp->v_mount != tdvp->v_mount || 1301 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1302 error = EXDEV; 1303 goto out_unlocked; 1304 } 1305 1306 fnode = VTOI(fvp); 1307 fdnode = VTOI(fdvp); 1308 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1309 tdnode = VTOI(tdvp); 1310 1311 /* lock our source dir */ 1312 if (fdnode != tdnode) { 1313 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1314 if (error != 0) 1315 goto out_unlocked; 1316 } 1317 1318 /* get info about the node to be moved */ 1319 vn_lock(fvp, LK_SHARED | LK_RETRY); 1320 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1321 VOP_UNLOCK(fvp); 1322 KASSERT(error == 0); 1323 1324 /* check when to delete the old already existing entry */ 1325 if (tvp) { 1326 /* get info about the node to be moved to */ 1327 error = VOP_GETATTR(tvp, &tvap, FSCRED); 1328 KASSERT(error == 0); 1329 1330 /* if both dirs, make sure the destination is empty */ 1331 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1332 if (tvap.va_nlink > 2) { 1333 error = ENOTEMPTY; 1334 goto out; 1335 } 1336 } 1337 /* if moving dir, make sure destination is dir too */ 1338 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1339 error = ENOTDIR; 1340 goto out; 1341 } 1342 /* if we're moving a non-directory, make sure dest is no dir */ 1343 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1344 error = EISDIR; 1345 goto out; 1346 } 1347 } 1348 1349 /* don't allow renaming directories across directory for now */ 1350 if (fdnode != tdnode) { 1351 if (fvp->v_type == VDIR) { 1352 error = EINVAL; 1353 goto out; 1354 } 1355 } 1356 1357 /* remove existing entry if present */ 1358 if (tvp) 1359 nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1360 1361 /* create new directory entry for the node */ 1362 error = nilfs_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1363 if (error) 1364 goto out; 1365 1366 /* unlink old directory entry for the node, if failing, unattach new */ 1367 error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1368 if (error) 1369 nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1370 1371out: 1372 if (fdnode != tdnode) 1373 VOP_UNLOCK(fdvp); 1374 1375out_unlocked: 1376 VOP_ABORTOP(tdvp, tcnp); 1377 if (tdvp == tvp) 1378 vrele(tdvp); 1379 else 1380 vput(tdvp); 1381 if (tvp) 1382 vput(tvp); 1383 VOP_ABORTOP(fdvp, fcnp); 1384 1385 /* release source nodes. */ 1386 vrele(fdvp); 1387 vrele(fvp); 1388 1389 return error; 1390} 1391 1392/* --------------------------------------------------------------------- */ 1393 1394int 1395nilfs_remove(void *v) 1396{ 1397 struct vop_remove_v3_args /* { 1398 struct vnode *a_dvp; 1399 struct vnode *a_vp; 1400 struct componentname *a_cnp; 1401 nlink_t ctx_vp_new_nlink; 1402 } */ *ap = v; 1403 struct vnode *dvp = ap->a_dvp; 1404 struct vnode *vp = ap->a_vp; 1405 struct componentname *cnp = ap->a_cnp; 1406 struct nilfs_node *dir_node = VTOI(dvp); 1407 struct nilfs_node *nilfs_node = VTOI(vp); 1408 struct nilfs_mount *ump = dir_node->ump; 1409 int error; 1410 1411 DPRINTF(VFSCALL, ("nilfs_remove called\n")); 1412 if (vp->v_type != VDIR) { 1413 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1414 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1415 } else { 1416 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1417 error = EPERM; 1418 } 1419 1420 if (dvp == vp) 1421 vrele(vp); 1422 else 1423 vput(vp); 1424 1425 return error; 1426} 1427 1428/* --------------------------------------------------------------------- */ 1429 1430int 1431nilfs_rmdir(void *v) 1432{ 1433 struct vop_rmdir_v2_args /* { 1434 struct vnode *a_dvp; 1435 struct vnode *a_vp; 1436 struct componentname *a_cnp; 1437 } */ *ap = v; 1438 struct vnode *vp = ap->a_vp; 1439 struct vnode *dvp = ap->a_dvp; 1440 struct componentname *cnp = ap->a_cnp; 1441 struct nilfs_node *dir_node = VTOI(dvp); 1442 struct nilfs_node *nilfs_node = VTOI(vp); 1443 struct nilfs_mount *ump = dir_node->ump; 1444 int refcnt, error; 1445 1446 DPRINTF(NOTIMPL, ("nilfs_rmdir called\n")); 1447 1448 /* don't allow '.' to be deleted */ 1449 if (dir_node == nilfs_node) { 1450 vrele(vp); 1451 return EINVAL; 1452 } 1453 1454 /* check to see if the directory is empty */ 1455 error = 0; 1456 refcnt = 2; /* XXX */ 1457 if (refcnt > 1) { 1458 /* NOT empty */ 1459 vput(vp); 1460 return ENOTEMPTY; 1461 } 1462 1463 /* detach the node from the directory */ 1464 error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp); 1465 if (error == 0) { 1466 cache_purge(vp); 1467// cache_purge(dvp); /* XXX from msdosfs, why? */ 1468 } 1469 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1470 1471 /* put the node and exit */ 1472 vput(vp); 1473 1474 return error; 1475} 1476 1477/* --------------------------------------------------------------------- */ 1478 1479int 1480nilfs_fsync(void *v) 1481{ 1482 struct vop_fsync_args /* { 1483 struct vnode *a_vp; 1484 kauth_cred_t a_cred; 1485 int a_flags; 1486 off_t offlo; 1487 off_t offhi; 1488 struct proc *a_p; 1489 } */ *ap = v; 1490 struct vnode *vp = ap->a_vp; 1491// struct nilfs_node *nilfs_node = VTOI(vp); 1492// int error, flags, wait; 1493 1494 DPRINTF(STRATEGY, ("nilfs_fsync called : %s, %s\n", 1495 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 1496 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 1497 1498 vp = vp; 1499 return 0; 1500} 1501 1502/* --------------------------------------------------------------------- */ 1503 1504int 1505nilfs_advlock(void *v) 1506{ 1507 struct vop_advlock_args /* { 1508 struct vnode *a_vp; 1509 void *a_id; 1510 int a_op; 1511 struct flock *a_fl; 1512 int a_flags; 1513 } */ *ap = v; 1514 struct vnode *vp = ap->a_vp; 1515 struct nilfs_node *nilfs_node = VTOI(vp); 1516 uint64_t file_size; 1517 1518 DPRINTF(LOCKING, ("nilfs_advlock called\n")); 1519 1520 assert(nilfs_node); 1521 file_size = nilfs_rw64(nilfs_node->inode.i_size); 1522 1523 return lf_advlock(ap, &nilfs_node->lockf, file_size); 1524} 1525 1526/* --------------------------------------------------------------------- */ 1527 1528 1529/* Global vfs vnode data structures for nilfss */ 1530int (**nilfs_vnodeop_p) __P((void *)); 1531 1532const struct vnodeopv_entry_desc nilfs_vnodeop_entries[] = { 1533 { &vop_default_desc, vn_default_error }, 1534 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 1535 { &vop_lookup_desc, nilfs_lookup }, /* lookup */ 1536 { &vop_create_desc, nilfs_create }, /* create */ 1537 { &vop_mknod_desc, nilfs_mknod }, /* mknod */ /* TODO */ 1538 { &vop_open_desc, nilfs_open }, /* open */ 1539 { &vop_close_desc, nilfs_close }, /* close */ 1540 { &vop_access_desc, nilfs_access }, /* access */ 1541 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 1542 { &vop_getattr_desc, nilfs_getattr }, /* getattr */ 1543 { &vop_setattr_desc, nilfs_setattr }, /* setattr */ /* TODO chflags */ 1544 { &vop_read_desc, nilfs_read }, /* read */ 1545 { &vop_write_desc, nilfs_write }, /* write */ /* WRITE */ 1546 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 1547 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 1548 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 1549 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 1550 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 1551 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 1552 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 1553 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 1554 { &vop_fsync_desc, nilfs_fsync }, /* fsync */ 1555 { &vop_seek_desc, genfs_seek }, /* seek */ 1556 { &vop_remove_desc, nilfs_remove }, /* remove */ 1557 { &vop_link_desc, nilfs_link }, /* link */ /* TODO */ 1558 { &vop_rename_desc, nilfs_rename }, /* rename */ /* TODO */ 1559 { &vop_mkdir_desc, nilfs_mkdir }, /* mkdir */ 1560 { &vop_rmdir_desc, nilfs_rmdir }, /* rmdir */ 1561 { &vop_symlink_desc, nilfs_symlink }, /* symlink */ /* TODO */ 1562 { &vop_readdir_desc, nilfs_readdir }, /* readdir */ 1563 { &vop_readlink_desc, nilfs_readlink }, /* readlink */ /* TEST ME */ 1564 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 1565 { &vop_inactive_desc, nilfs_inactive }, /* inactive */ 1566 { &vop_reclaim_desc, nilfs_reclaim }, /* reclaim */ 1567 { &vop_lock_desc, genfs_lock }, /* lock */ 1568 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 1569 { &vop_bmap_desc, nilfs_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 1570 { &vop_strategy_desc, nilfs_vfsstrategy },/* strategy */ 1571/* { &vop_print_desc, nilfs_print }, */ /* print */ 1572 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 1573 { &vop_pathconf_desc, nilfs_pathconf }, /* pathconf */ 1574 { &vop_advlock_desc, nilfs_advlock }, /* advlock */ /* TEST ME */ 1575 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 1576 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1577 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1578 { NULL, NULL } 1579}; 1580 1581 1582const struct vnodeopv_desc nilfs_vnodeop_opv_desc = { 1583 &nilfs_vnodeop_p, nilfs_vnodeop_entries 1584}; 1585 1586