lfs_alloc.c revision 1.106.8.1
1 /* $NetBSD: lfs_alloc.c,v 1.106.8.1 2008/05/18 12:35:55 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000, 2001, 2002, 2003, 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Konrad E. Schroder <perseant (at) hhhh.org>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 1991, 1993 33 * The Regents of the University of California. All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)lfs_alloc.c 8.4 (Berkeley) 1/4/94 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: lfs_alloc.c,v 1.106.8.1 2008/05/18 12:35:55 yamt Exp $"); 64 65 #if defined(_KERNEL_OPT) 66 #include "opt_quota.h" 67 #endif 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/kernel.h> 72 #include <sys/buf.h> 73 #include <sys/lock.h> 74 #include <sys/vnode.h> 75 #include <sys/syslog.h> 76 #include <sys/mount.h> 77 #include <sys/malloc.h> 78 #include <sys/pool.h> 79 #include <sys/proc.h> 80 #include <sys/tree.h> 81 #include <sys/kauth.h> 82 83 #include <ufs/ufs/quota.h> 84 #include <ufs/ufs/inode.h> 85 #include <ufs/ufs/ufsmount.h> 86 #include <ufs/ufs/ufs_extern.h> 87 88 #include <ufs/lfs/lfs.h> 89 #include <ufs/lfs/lfs_extern.h> 90 91 extern kmutex_t ufs_hashlock; 92 93 /* Constants for inode free bitmap */ 94 #define BMSHIFT 5 /* 2 ** 5 = 32 */ 95 #define BMMASK ((1 << BMSHIFT) - 1) 96 #define SET_BITMAP_FREE(F, I) do { \ 97 DLOG((DLOG_ALLOC, "lfs: ino %d wrd %d bit %d set\n", (int)(I), \ 98 (int)((I) >> BMSHIFT), (int)((I) & BMMASK))); \ 99 (F)->lfs_ino_bitmap[(I) >> BMSHIFT] |= (1 << ((I) & BMMASK)); \ 100 } while (0) 101 #define CLR_BITMAP_FREE(F, I) do { \ 102 DLOG((DLOG_ALLOC, "lfs: ino %d wrd %d bit %d clr\n", (int)(I), \ 103 (int)((I) >> BMSHIFT), (int)((I) & BMMASK))); \ 104 (F)->lfs_ino_bitmap[(I) >> BMSHIFT] &= ~(1 << ((I) & BMMASK)); \ 105 } while(0) 106 107 #define ISSET_BITMAP_FREE(F, I) \ 108 ((F)->lfs_ino_bitmap[(I) >> BMSHIFT] & (1 << ((I) & BMMASK))) 109 110 /* 111 * Add a new block to the Ifile, to accommodate future file creations. 112 * Called with the segment lock held. 113 */ 114 int 115 lfs_extend_ifile(struct lfs *fs, kauth_cred_t cred) 116 { 117 struct vnode *vp; 118 struct inode *ip; 119 IFILE *ifp; 120 IFILE_V1 *ifp_v1; 121 struct buf *bp, *cbp; 122 int error; 123 daddr_t i, blkno, xmax; 124 ino_t oldlast, maxino; 125 CLEANERINFO *cip; 126 127 ASSERT_SEGLOCK(fs); 128 129 vp = fs->lfs_ivnode; 130 ip = VTOI(vp); 131 blkno = lblkno(fs, ip->i_size); 132 if ((error = lfs_balloc(vp, ip->i_size, fs->lfs_bsize, cred, 0, 133 &bp)) != 0) { 134 return (error); 135 } 136 ip->i_size += fs->lfs_bsize; 137 ip->i_ffs1_size = ip->i_size; 138 uvm_vnp_setsize(vp, ip->i_size); 139 140 maxino = ((ip->i_size >> fs->lfs_bshift) - fs->lfs_cleansz - 141 fs->lfs_segtabsz) * fs->lfs_ifpb; 142 fs->lfs_ino_bitmap = (lfs_bm_t *) 143 realloc(fs->lfs_ino_bitmap, ((maxino + BMMASK) >> BMSHIFT) * 144 sizeof(lfs_bm_t), M_SEGMENT, M_WAITOK); 145 KASSERT(fs->lfs_ino_bitmap != NULL); 146 147 i = (blkno - fs->lfs_segtabsz - fs->lfs_cleansz) * 148 fs->lfs_ifpb; 149 150 /* 151 * We insert the new inodes at the head of the free list. 152 * Under normal circumstances, the free list is empty here, 153 * so we are also incidentally placing them at the end (which 154 * we must do if we are to keep them in order). 155 */ 156 LFS_GET_HEADFREE(fs, cip, cbp, &oldlast); 157 LFS_PUT_HEADFREE(fs, cip, cbp, i); 158 #ifdef DIAGNOSTIC 159 if (fs->lfs_freehd == LFS_UNUSED_INUM) 160 panic("inode 0 allocated [2]"); 161 #endif /* DIAGNOSTIC */ 162 xmax = i + fs->lfs_ifpb; 163 164 if (fs->lfs_version == 1) { 165 for (ifp_v1 = (IFILE_V1 *)bp->b_data; i < xmax; ++ifp_v1) { 166 SET_BITMAP_FREE(fs, i); 167 ifp_v1->if_version = 1; 168 ifp_v1->if_daddr = LFS_UNUSED_DADDR; 169 ifp_v1->if_nextfree = ++i; 170 } 171 ifp_v1--; 172 ifp_v1->if_nextfree = oldlast; 173 } else { 174 for (ifp = (IFILE *)bp->b_data; i < xmax; ++ifp) { 175 SET_BITMAP_FREE(fs, i); 176 ifp->if_version = 1; 177 ifp->if_daddr = LFS_UNUSED_DADDR; 178 ifp->if_nextfree = ++i; 179 } 180 ifp--; 181 ifp->if_nextfree = oldlast; 182 } 183 LFS_PUT_TAILFREE(fs, cip, cbp, xmax - 1); 184 185 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 186 187 return 0; 188 } 189 190 /* Allocate a new inode. */ 191 /* ARGSUSED */ 192 /* VOP_BWRITE 2i times */ 193 int 194 lfs_valloc(struct vnode *pvp, int mode, kauth_cred_t cred, 195 struct vnode **vpp) 196 { 197 struct lfs *fs; 198 struct buf *bp, *cbp; 199 struct ifile *ifp; 200 ino_t new_ino; 201 int error; 202 int new_gen; 203 CLEANERINFO *cip; 204 205 fs = VTOI(pvp)->i_lfs; 206 if (fs->lfs_ronly) 207 return EROFS; 208 209 ASSERT_NO_SEGLOCK(fs); 210 211 lfs_seglock(fs, SEGM_PROT); 212 vn_lock(fs->lfs_ivnode, LK_EXCLUSIVE); 213 214 /* Get the head of the freelist. */ 215 LFS_GET_HEADFREE(fs, cip, cbp, &new_ino); 216 KASSERT(new_ino != LFS_UNUSED_INUM && new_ino != LFS_IFILE_INUM); 217 218 DLOG((DLOG_ALLOC, "lfs_valloc: allocate inode %lld\n", 219 (long long)new_ino)); 220 221 /* 222 * Remove the inode from the free list and write the new start 223 * of the free list into the superblock. 224 */ 225 CLR_BITMAP_FREE(fs, new_ino); 226 LFS_IENTRY(ifp, fs, new_ino, bp); 227 if (ifp->if_daddr != LFS_UNUSED_DADDR) 228 panic("lfs_valloc: inuse inode %llu on the free list", 229 (unsigned long long)new_ino); 230 LFS_PUT_HEADFREE(fs, cip, cbp, ifp->if_nextfree); 231 DLOG((DLOG_ALLOC, "lfs_valloc: headfree %lld -> %lld\n", 232 (long long)new_ino, (long long)ifp->if_nextfree)); 233 234 new_gen = ifp->if_version; /* version was updated by vfree */ 235 brelse(bp, 0); 236 237 /* Extend IFILE so that the next lfs_valloc will succeed. */ 238 if (fs->lfs_freehd == LFS_UNUSED_INUM) { 239 if ((error = lfs_extend_ifile(fs, cred)) != 0) { 240 LFS_PUT_HEADFREE(fs, cip, cbp, new_ino); 241 VOP_UNLOCK(fs->lfs_ivnode, 0); 242 lfs_segunlock(fs); 243 return error; 244 } 245 } 246 #ifdef DIAGNOSTIC 247 if (fs->lfs_freehd == LFS_UNUSED_INUM) 248 panic("inode 0 allocated [3]"); 249 #endif /* DIAGNOSTIC */ 250 251 /* Set superblock modified bit and increment file count. */ 252 mutex_enter(&lfs_lock); 253 fs->lfs_fmod = 1; 254 mutex_exit(&lfs_lock); 255 ++fs->lfs_nfiles; 256 257 VOP_UNLOCK(fs->lfs_ivnode, 0); 258 lfs_segunlock(fs); 259 260 return lfs_ialloc(fs, pvp, new_ino, new_gen, vpp); 261 } 262 263 /* 264 * Finish allocating a new inode, given an inode and generation number. 265 */ 266 int 267 lfs_ialloc(struct lfs *fs, struct vnode *pvp, ino_t new_ino, int new_gen, 268 struct vnode **vpp) 269 { 270 struct inode *ip; 271 struct vnode *vp; 272 273 ASSERT_NO_SEGLOCK(fs); 274 275 vp = *vpp; 276 mutex_enter(&ufs_hashlock); 277 /* Create an inode to associate with the vnode. */ 278 lfs_vcreate(pvp->v_mount, new_ino, vp); 279 280 ip = VTOI(vp); 281 mutex_enter(&lfs_lock); 282 LFS_SET_UINO(ip, IN_CHANGE); 283 mutex_exit(&lfs_lock); 284 /* on-disk structure has been zeroed out by lfs_vcreate */ 285 ip->i_din.ffs1_din->di_inumber = new_ino; 286 287 /* Note no blocks yet */ 288 ip->i_lfs_hiblk = -1; 289 290 /* Set a new generation number for this inode. */ 291 if (new_gen) { 292 ip->i_gen = new_gen; 293 ip->i_ffs1_gen = new_gen; 294 } 295 296 /* Insert into the inode hash table. */ 297 ufs_ihashins(ip); 298 mutex_exit(&ufs_hashlock); 299 300 ufs_vinit(vp->v_mount, lfs_specop_p, lfs_fifoop_p, vpp); 301 vp = *vpp; 302 ip = VTOI(vp); 303 304 memset(ip->i_lfs_fragsize, 0, NDADDR * sizeof(*ip->i_lfs_fragsize)); 305 306 uvm_vnp_setsize(vp, 0); 307 lfs_mark_vnode(vp); 308 genfs_node_init(vp, &lfs_genfsops); 309 VREF(ip->i_devvp); 310 return (0); 311 } 312 313 /* Create a new vnode/inode pair and initialize what fields we can. */ 314 void 315 lfs_vcreate(struct mount *mp, ino_t ino, struct vnode *vp) 316 { 317 struct inode *ip; 318 struct ufs1_dinode *dp; 319 struct ufsmount *ump; 320 321 /* Get a pointer to the private mount structure. */ 322 ump = VFSTOUFS(mp); 323 324 ASSERT_NO_SEGLOCK(ump->um_lfs); 325 326 /* Initialize the inode. */ 327 ip = pool_get(&lfs_inode_pool, PR_WAITOK); 328 memset(ip, 0, sizeof(*ip)); 329 dp = pool_get(&lfs_dinode_pool, PR_WAITOK); 330 memset(dp, 0, sizeof(*dp)); 331 ip->inode_ext.lfs = pool_get(&lfs_inoext_pool, PR_WAITOK); 332 memset(ip->inode_ext.lfs, 0, sizeof(*ip->inode_ext.lfs)); 333 vp->v_data = ip; 334 ip->i_din.ffs1_din = dp; 335 ip->i_ump = ump; 336 ip->i_vnode = vp; 337 ip->i_devvp = ump->um_devvp; 338 ip->i_dev = ump->um_dev; 339 ip->i_number = dp->di_inumber = ino; 340 ip->i_lfs = ump->um_lfs; 341 ip->i_lfs_effnblks = 0; 342 SPLAY_INIT(&ip->i_lfs_lbtree); 343 ip->i_lfs_nbtree = 0; 344 LIST_INIT(&ip->i_lfs_segdhd); 345 #ifdef QUOTA 346 ufsquota_init(ip); 347 #endif 348 } 349 350 #if 0 351 /* 352 * Find the highest-numbered allocated inode. 353 * This will be used to shrink the Ifile. 354 */ 355 static inline ino_t 356 lfs_last_alloc_ino(struct lfs *fs) 357 { 358 ino_t ino, maxino; 359 360 maxino = ((fs->lfs_ivnode->v_size >> fs->lfs_bshift) - 361 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb; 362 for (ino = maxino - 1; ino > LFS_UNUSED_INUM; --ino) { 363 if (ISSET_BITMAP_FREE(fs, ino) == 0) 364 break; 365 } 366 return ino; 367 } 368 #endif 369 370 /* 371 * Find the previous (next lowest numbered) free inode, if any. 372 * If there is none, return LFS_UNUSED_INUM. 373 */ 374 static inline ino_t 375 lfs_freelist_prev(struct lfs *fs, ino_t ino) 376 { 377 ino_t tino, bound, bb, freehdbb; 378 379 if (fs->lfs_freehd == LFS_UNUSED_INUM) /* No free inodes at all */ 380 return LFS_UNUSED_INUM; 381 382 /* Search our own word first */ 383 bound = ino & ~BMMASK; 384 for (tino = ino - 1; tino >= bound && tino > LFS_UNUSED_INUM; tino--) 385 if (ISSET_BITMAP_FREE(fs, tino)) 386 return tino; 387 /* If there are no lower words to search, just return */ 388 if (ino >> BMSHIFT == 0) 389 return LFS_UNUSED_INUM; 390 391 /* 392 * Find a word with a free inode in it. We have to be a bit 393 * careful here since ino_t is unsigned. 394 */ 395 freehdbb = (fs->lfs_freehd >> BMSHIFT); 396 for (bb = (ino >> BMSHIFT) - 1; bb >= freehdbb && bb > 0; --bb) 397 if (fs->lfs_ino_bitmap[bb]) 398 break; 399 if (fs->lfs_ino_bitmap[bb] == 0) 400 return LFS_UNUSED_INUM; 401 402 /* Search the word we found */ 403 for (tino = (bb << BMSHIFT) | BMMASK; tino >= (bb << BMSHIFT) && 404 tino > LFS_UNUSED_INUM; tino--) 405 if (ISSET_BITMAP_FREE(fs, tino)) 406 break; 407 408 if (tino <= LFS_IFILE_INUM) 409 tino = LFS_UNUSED_INUM; 410 411 return tino; 412 } 413 414 /* Free an inode. */ 415 /* ARGUSED */ 416 /* VOP_BWRITE 2i times */ 417 int 418 lfs_vfree(struct vnode *vp, ino_t ino, int mode) 419 { 420 SEGUSE *sup; 421 CLEANERINFO *cip; 422 struct buf *cbp, *bp; 423 struct ifile *ifp; 424 struct inode *ip; 425 struct lfs *fs; 426 daddr_t old_iaddr; 427 ino_t otail; 428 429 /* Get the inode number and file system. */ 430 ip = VTOI(vp); 431 fs = ip->i_lfs; 432 ino = ip->i_number; 433 434 ASSERT_NO_SEGLOCK(fs); 435 DLOG((DLOG_ALLOC, "lfs_vfree: free ino %lld\n", (long long)ino)); 436 437 /* Drain of pending writes */ 438 mutex_enter(&vp->v_interlock); 439 while (fs->lfs_version > 1 && WRITEINPROG(vp)) { 440 cv_wait(&vp->v_cv, &vp->v_interlock); 441 } 442 mutex_exit(&vp->v_interlock); 443 444 lfs_seglock(fs, SEGM_PROT); 445 vn_lock(fs->lfs_ivnode, LK_EXCLUSIVE); 446 447 lfs_unmark_vnode(vp); 448 mutex_enter(&lfs_lock); 449 if (vp->v_uflag & VU_DIROP) { 450 vp->v_uflag &= ~VU_DIROP; 451 --lfs_dirvcount; 452 --fs->lfs_dirvcount; 453 TAILQ_REMOVE(&fs->lfs_dchainhd, ip, i_lfs_dchain); 454 wakeup(&fs->lfs_dirvcount); 455 wakeup(&lfs_dirvcount); 456 mutex_exit(&lfs_lock); 457 lfs_vunref(vp); 458 459 /* 460 * If this inode is not going to be written any more, any 461 * segment accounting left over from its truncation needs 462 * to occur at the end of the next dirops flush. Attach 463 * them to the fs-wide list for that purpose. 464 */ 465 if (LIST_FIRST(&ip->i_lfs_segdhd) != NULL) { 466 struct segdelta *sd; 467 468 while((sd = LIST_FIRST(&ip->i_lfs_segdhd)) != NULL) { 469 LIST_REMOVE(sd, list); 470 LIST_INSERT_HEAD(&fs->lfs_segdhd, sd, list); 471 } 472 } 473 } else { 474 /* 475 * If it's not a dirop, we can finalize right away. 476 */ 477 mutex_exit(&lfs_lock); 478 lfs_finalize_ino_seguse(fs, ip); 479 } 480 481 mutex_enter(&lfs_lock); 482 LFS_CLR_UINO(ip, IN_ACCESSED|IN_CLEANING|IN_MODIFIED); 483 mutex_exit(&lfs_lock); 484 ip->i_flag &= ~IN_ALLMOD; 485 ip->i_lfs_iflags |= LFSI_DELETED; 486 487 /* 488 * Set the ifile's inode entry to unused, increment its version number 489 * and link it onto the free chain. 490 */ 491 SET_BITMAP_FREE(fs, ino); 492 LFS_IENTRY(ifp, fs, ino, bp); 493 old_iaddr = ifp->if_daddr; 494 ifp->if_daddr = LFS_UNUSED_DADDR; 495 ++ifp->if_version; 496 if (fs->lfs_version == 1) { 497 LFS_GET_HEADFREE(fs, cip, cbp, &(ifp->if_nextfree)); 498 LFS_PUT_HEADFREE(fs, cip, cbp, ino); 499 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 500 } else { 501 ino_t tino, onf; 502 503 ifp->if_nextfree = LFS_UNUSED_INUM; 504 (void) LFS_BWRITE_LOG(bp); /* Ifile */ 505 506 tino = lfs_freelist_prev(fs, ino); 507 if (tino == LFS_UNUSED_INUM) { 508 /* Nothing free below us, put us on the head */ 509 LFS_IENTRY(ifp, fs, ino, bp); 510 LFS_GET_HEADFREE(fs, cip, cbp, &(ifp->if_nextfree)); 511 LFS_PUT_HEADFREE(fs, cip, cbp, ino); 512 DLOG((DLOG_ALLOC, "lfs_vfree: headfree %lld -> %lld\n", 513 (long long)ifp->if_nextfree, (long long)ino)); 514 LFS_BWRITE_LOG(bp); /* Ifile */ 515 516 /* If the list was empty, set tail too */ 517 LFS_GET_TAILFREE(fs, cip, cbp, &otail); 518 if (otail == LFS_UNUSED_INUM) { 519 LFS_PUT_TAILFREE(fs, cip, cbp, ino); 520 DLOG((DLOG_ALLOC, "lfs_vfree: tailfree %lld " 521 "-> %lld\n", (long long)otail, 522 (long long)ino)); 523 } 524 } else { 525 /* 526 * Insert this inode into the list after tino. 527 * We hold the segment lock so we don't have to 528 * worry about blocks being written out of order. 529 */ 530 DLOG((DLOG_ALLOC, "lfs_vfree: insert ino %lld " 531 " after %lld\n", ino, tino)); 532 533 LFS_IENTRY(ifp, fs, tino, bp); 534 onf = ifp->if_nextfree; 535 ifp->if_nextfree = ino; 536 LFS_BWRITE_LOG(bp); /* Ifile */ 537 538 LFS_IENTRY(ifp, fs, ino, bp); 539 ifp->if_nextfree = onf; 540 LFS_BWRITE_LOG(bp); /* Ifile */ 541 542 /* If we're last, put us on the tail */ 543 if (onf == LFS_UNUSED_INUM) { 544 LFS_GET_TAILFREE(fs, cip, cbp, &otail); 545 LFS_PUT_TAILFREE(fs, cip, cbp, ino); 546 DLOG((DLOG_ALLOC, "lfs_vfree: tailfree %lld " 547 "-> %lld\n", (long long)otail, 548 (long long)ino)); 549 } 550 } 551 } 552 #ifdef DIAGNOSTIC 553 if (ino == LFS_UNUSED_INUM) { 554 panic("inode 0 freed"); 555 } 556 #endif /* DIAGNOSTIC */ 557 if (old_iaddr != LFS_UNUSED_DADDR) { 558 LFS_SEGENTRY(sup, fs, dtosn(fs, old_iaddr), bp); 559 #ifdef DIAGNOSTIC 560 if (sup->su_nbytes < sizeof (struct ufs1_dinode)) { 561 printf("lfs_vfree: negative byte count" 562 " (segment %" PRIu32 " short by %d)\n", 563 dtosn(fs, old_iaddr), 564 (int)sizeof (struct ufs1_dinode) - 565 sup->su_nbytes); 566 panic("lfs_vfree: negative byte count"); 567 sup->su_nbytes = sizeof (struct ufs1_dinode); 568 } 569 #endif 570 sup->su_nbytes -= sizeof (struct ufs1_dinode); 571 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, old_iaddr), bp); /* Ifile */ 572 } 573 574 /* Set superblock modified bit and decrement file count. */ 575 mutex_enter(&lfs_lock); 576 fs->lfs_fmod = 1; 577 mutex_exit(&lfs_lock); 578 --fs->lfs_nfiles; 579 580 VOP_UNLOCK(fs->lfs_ivnode, 0); 581 lfs_segunlock(fs); 582 583 return (0); 584 } 585 586 /* 587 * Sort the freelist and set up the free-inode bitmap. 588 * To be called by lfs_mountfs(). 589 */ 590 void 591 lfs_order_freelist(struct lfs *fs) 592 { 593 CLEANERINFO *cip; 594 IFILE *ifp = NULL; 595 struct buf *bp; 596 ino_t ino, firstino, lastino, maxino; 597 #ifdef notyet 598 struct vnode *vp; 599 #endif 600 601 ASSERT_NO_SEGLOCK(fs); 602 lfs_seglock(fs, SEGM_PROT); 603 604 maxino = ((fs->lfs_ivnode->v_size >> fs->lfs_bshift) - 605 fs->lfs_cleansz - fs->lfs_segtabsz) * fs->lfs_ifpb; 606 fs->lfs_ino_bitmap = (lfs_bm_t *) 607 malloc(((maxino + BMMASK) >> BMSHIFT) * sizeof(lfs_bm_t), 608 M_SEGMENT, M_WAITOK | M_ZERO); 609 KASSERT(fs->lfs_ino_bitmap != NULL); 610 611 firstino = lastino = LFS_UNUSED_INUM; 612 for (ino = 0; ino < maxino; ino++) { 613 if (ino % fs->lfs_ifpb == 0) 614 LFS_IENTRY(ifp, fs, ino, bp); 615 else 616 ++ifp; 617 618 /* Don't put zero or ifile on the free list */ 619 if (ino == LFS_UNUSED_INUM || ino == LFS_IFILE_INUM) 620 continue; 621 622 #ifdef notyet 623 /* Address orphaned files */ 624 if (ifp->if_nextfree == LFS_ORPHAN_NEXTFREE && 625 VFS_VGET(fs->lfs_ivnode->v_mount, ino, &vp) == 0) { 626 lfs_truncate(vp, 0, 0, NOCRED); 627 vput(vp); 628 LFS_SEGENTRY(sup, fs, dtosn(fs, ifp->if_daddr), bp); 629 KASSERT(sup->su_nbytes >= DINODE1_SIZE); 630 sup->su_nbytes -= DINODE1_SIZE; 631 LFS_WRITESEGENTRY(sup, fs, dtosn(fs, ifp->if_daddr), bp); 632 633 /* Set up to fall through to next section */ 634 ifp->if_daddr = LFS_UNUSED_DADDR; 635 LFS_BWRITE_LOG(bp); 636 LFS_IENTRY(ifp, fs, ino, bp); 637 } 638 #endif 639 640 if (ifp->if_daddr == LFS_UNUSED_DADDR) { 641 if (firstino == LFS_UNUSED_INUM) 642 firstino = ino; 643 else { 644 brelse(bp, 0); 645 646 LFS_IENTRY(ifp, fs, lastino, bp); 647 ifp->if_nextfree = ino; 648 LFS_BWRITE_LOG(bp); 649 650 LFS_IENTRY(ifp, fs, ino, bp); 651 } 652 lastino = ino; 653 654 SET_BITMAP_FREE(fs, ino); 655 } 656 657 if ((ino + 1) % fs->lfs_ifpb == 0) 658 brelse(bp, 0); 659 } 660 661 LFS_PUT_HEADFREE(fs, cip, bp, firstino); 662 LFS_PUT_TAILFREE(fs, cip, bp, lastino); 663 664 lfs_segunlock(fs); 665 } 666 667 void 668 lfs_orphan(struct lfs *fs, ino_t ino) 669 { 670 IFILE *ifp; 671 struct buf *bp; 672 673 LFS_IENTRY(ifp, fs, ino, bp); 674 ifp->if_nextfree = LFS_ORPHAN_NEXTFREE; 675 LFS_BWRITE_LOG(bp); 676 } 677
Indexes created Wed Oct 01 19:09:53 GMT 2025