1 /* 2 * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 59 21 * Temple Place - Suite 330, Boston MA 02111-1307, USA. 22 * 23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 24 * Mountain View, CA 94043, or: 25 * 26 * http://www.sgi.com 27 * 28 * For further information regarding this notice, see: 29 * 30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ 31 */ 32 33 #include "xfs.h" 34 #include "xfs_macros.h" 35 #include "xfs_types.h" 36 #include "xfs_inum.h" 37 #include "xfs_log.h" 38 #include "xfs_trans.h" 39 #include "xfs_sb.h" 40 #include "xfs_dir.h" 41 #include "xfs_dmapi.h" 42 #include "xfs_mount.h" 43 #include "xfs_ag.h" 44 #include "xfs_alloc_btree.h" 45 #include "xfs_bmap_btree.h" 46 #include "xfs_ialloc_btree.h" 47 #include "xfs_btree.h" 48 #include "xfs_error.h" 49 #include "xfs_alloc.h" 50 #include "xfs_ialloc.h" 51 #include "xfs_fsops.h" 52 #include "xfs_itable.h" 53 #include "xfs_rw.h" 54 #include "xfs_refcache.h" 55 #include "xfs_trans_space.h" 56 #include "xfs_rtalloc.h" 57 #include "xfs_dir2.h" 58 #include "xfs_attr_sf.h" 59 #include "xfs_dir_sf.h" 60 #include "xfs_dir2_sf.h" 61 #include "xfs_dinode.h" 62 #include "xfs_inode.h" 63 #include "xfs_inode_item.h" 64 65 /* 66 * File system operations 67 */ 68 69 int 70 xfs_fs_geometry( 71 xfs_mount_t *mp, 72 xfs_fsop_geom_t *geo, 73 int new_version) 74 { 75 geo->blocksize = mp->m_sb.sb_blocksize; 76 geo->rtextsize = mp->m_sb.sb_rextsize; 77 geo->agblocks = mp->m_sb.sb_agblocks; 78 geo->agcount = mp->m_sb.sb_agcount; 79 geo->logblocks = mp->m_sb.sb_logblocks; 80 geo->sectsize = mp->m_sb.sb_sectsize; 81 geo->inodesize = mp->m_sb.sb_inodesize; 82 geo->imaxpct = mp->m_sb.sb_imax_pct; 83 geo->datablocks = mp->m_sb.sb_dblocks; 84 geo->rtblocks = mp->m_sb.sb_rblocks; 85 geo->rtextents = mp->m_sb.sb_rextents; 86 geo->logstart = mp->m_sb.sb_logstart; 87 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); 88 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); 89 if (new_version >= 2) { 90 geo->sunit = mp->m_sb.sb_unit; 91 geo->swidth = mp->m_sb.sb_width; 92 } 93 if (new_version >= 3) { 94 geo->version = XFS_FSOP_GEOM_VERSION; 95 geo->flags = 96 (XFS_SB_VERSION_HASATTR(&mp->m_sb) ? 97 XFS_FSOP_GEOM_FLAGS_ATTR : 0) | 98 (XFS_SB_VERSION_HASNLINK(&mp->m_sb) ? 99 XFS_FSOP_GEOM_FLAGS_NLINK : 0) | 100 (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) ? 101 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | 102 (XFS_SB_VERSION_HASALIGN(&mp->m_sb) ? 103 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | 104 (XFS_SB_VERSION_HASDALIGN(&mp->m_sb) ? 105 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | 106 (XFS_SB_VERSION_HASSHARED(&mp->m_sb) ? 107 XFS_FSOP_GEOM_FLAGS_SHARED : 0) | 108 (XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) ? 109 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | 110 (XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ? 111 XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | 112 (XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? 113 XFS_FSOP_GEOM_FLAGS_SECTOR : 0); 114 geo->logsectsize = XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? 115 mp->m_sb.sb_logsectsize : BBSIZE; 116 geo->rtsectsize = mp->m_sb.sb_blocksize; 117 geo->dirblocksize = mp->m_dirblksize; 118 } 119 if (new_version >= 4) { 120 geo->flags |= 121 (XFS_SB_VERSION_HASLOGV2(&mp->m_sb) ? 122 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); 123 geo->logsunit = mp->m_sb.sb_logsunit; 124 } 125 return 0; 126 } 127 128 static int 129 xfs_growfs_data_private( 130 xfs_mount_t *mp, /* mount point for filesystem */ 131 xfs_growfs_data_t *in) /* growfs data input struct */ 132 { 133 xfs_agf_t *agf; 134 xfs_agi_t *agi; 135 xfs_agnumber_t agno; 136 xfs_extlen_t agsize; 137 xfs_extlen_t tmpsize; 138 xfs_alloc_rec_t *arec; 139 xfs_btree_sblock_t *block; 140 xfs_buf_t *bp; 141 int bucket; 142 int dpct; 143 int error; 144 xfs_agnumber_t nagcount; 145 xfs_agnumber_t nagimax = 0; 146 xfs_rfsblock_t nb, nb_mod; 147 xfs_rfsblock_t new; 148 xfs_rfsblock_t nfree; 149 xfs_agnumber_t oagcount; 150 int pct; 151 xfs_sb_t *sbp; 152 xfs_trans_t *tp; 153 154 nb = in->newblocks; 155 pct = in->imaxpct; 156 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) 157 return XFS_ERROR(EINVAL); 158 dpct = pct - mp->m_sb.sb_imax_pct; 159 error = xfs_read_buf(mp, mp->m_ddev_targp, 160 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), 161 XFS_FSS_TO_BB(mp, 1), 0, &bp); 162 if (error) 163 return error; 164 ASSERT(bp); 165 xfs_buf_relse(bp); 166 167 new = nb; /* use new as a temporary here */ 168 nb_mod = do_div(new, mp->m_sb.sb_agblocks); 169 nagcount = new + (nb_mod != 0); 170 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { 171 nagcount--; 172 nb = nagcount * mp->m_sb.sb_agblocks; 173 if (nb < mp->m_sb.sb_dblocks) 174 return XFS_ERROR(EINVAL); 175 } 176 new = nb - mp->m_sb.sb_dblocks; 177 oagcount = mp->m_sb.sb_agcount; 178 if (nagcount > oagcount) { 179 down_write(&mp->m_peraglock); 180 mp->m_perag = kmem_realloc(mp->m_perag, 181 sizeof(xfs_perag_t) * nagcount, 182 sizeof(xfs_perag_t) * oagcount, 183 KM_SLEEP); 184 memset(&mp->m_perag[oagcount], 0, 185 (nagcount - oagcount) * sizeof(xfs_perag_t)); 186 mp->m_flags |= XFS_MOUNT_32BITINODES; 187 nagimax = xfs_initialize_perag(mp, nagcount); 188 up_write(&mp->m_peraglock); 189 } 190 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); 191 if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), 192 XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { 193 xfs_trans_cancel(tp, 0); 194 return error; 195 } 196 197 nfree = 0; 198 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { 199 /* 200 * AG freelist header block 201 */ 202 bp = xfs_buf_get(mp->m_ddev_targp, 203 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), 204 XFS_FSS_TO_BB(mp, 1), 0); 205 agf = XFS_BUF_TO_AGF(bp); 206 memset(agf, 0, mp->m_sb.sb_sectsize); 207 INT_SET(agf->agf_magicnum, ARCH_CONVERT, XFS_AGF_MAGIC); 208 INT_SET(agf->agf_versionnum, ARCH_CONVERT, XFS_AGF_VERSION); 209 INT_SET(agf->agf_seqno, ARCH_CONVERT, agno); 210 if (agno == nagcount - 1) 211 agsize = 212 nb - 213 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); 214 else 215 agsize = mp->m_sb.sb_agblocks; 216 INT_SET(agf->agf_length, ARCH_CONVERT, agsize); 217 INT_SET(agf->agf_roots[XFS_BTNUM_BNOi], ARCH_CONVERT, 218 XFS_BNO_BLOCK(mp)); 219 INT_SET(agf->agf_roots[XFS_BTNUM_CNTi], ARCH_CONVERT, 220 XFS_CNT_BLOCK(mp)); 221 INT_SET(agf->agf_levels[XFS_BTNUM_BNOi], ARCH_CONVERT, 1); 222 INT_SET(agf->agf_levels[XFS_BTNUM_CNTi], ARCH_CONVERT, 1); 223 agf->agf_flfirst = 0; 224 INT_SET(agf->agf_fllast, ARCH_CONVERT, XFS_AGFL_SIZE(mp) - 1); 225 agf->agf_flcount = 0; 226 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); 227 INT_SET(agf->agf_freeblks, ARCH_CONVERT, tmpsize); 228 INT_SET(agf->agf_longest, ARCH_CONVERT, tmpsize); 229 error = xfs_bwrite(mp, bp); 230 if (error) { 231 goto error0; 232 } 233 /* 234 * AG inode header block 235 */ 236 bp = xfs_buf_get(mp->m_ddev_targp, 237 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), 238 XFS_FSS_TO_BB(mp, 1), 0); 239 agi = XFS_BUF_TO_AGI(bp); 240 memset(agi, 0, mp->m_sb.sb_sectsize); 241 INT_SET(agi->agi_magicnum, ARCH_CONVERT, XFS_AGI_MAGIC); 242 INT_SET(agi->agi_versionnum, ARCH_CONVERT, XFS_AGI_VERSION); 243 INT_SET(agi->agi_seqno, ARCH_CONVERT, agno); 244 INT_SET(agi->agi_length, ARCH_CONVERT, agsize); 245 agi->agi_count = 0; 246 INT_SET(agi->agi_root, ARCH_CONVERT, XFS_IBT_BLOCK(mp)); 247 INT_SET(agi->agi_level, ARCH_CONVERT, 1); 248 agi->agi_freecount = 0; 249 INT_SET(agi->agi_newino, ARCH_CONVERT, NULLAGINO); 250 INT_SET(agi->agi_dirino, ARCH_CONVERT, NULLAGINO); 251 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) 252 INT_SET(agi->agi_unlinked[bucket], ARCH_CONVERT, 253 NULLAGINO); 254 error = xfs_bwrite(mp, bp); 255 if (error) { 256 goto error0; 257 } 258 /* 259 * BNO btree root block 260 */ 261 bp = xfs_buf_get(mp->m_ddev_targp, 262 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), 263 BTOBB(mp->m_sb.sb_blocksize), 0); 264 block = XFS_BUF_TO_SBLOCK(bp); 265 memset(block, 0, mp->m_sb.sb_blocksize); 266 INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTB_MAGIC); 267 block->bb_level = 0; 268 INT_SET(block->bb_numrecs, ARCH_CONVERT, 1); 269 INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK); 270 INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK); 271 arec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, 272 block, 1, mp->m_alloc_mxr[0]); 273 INT_SET(arec->ar_startblock, ARCH_CONVERT, 274 XFS_PREALLOC_BLOCKS(mp)); 275 INT_SET(arec->ar_blockcount, ARCH_CONVERT, 276 agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT)); 277 error = xfs_bwrite(mp, bp); 278 if (error) { 279 goto error0; 280 } 281 /* 282 * CNT btree root block 283 */ 284 bp = xfs_buf_get(mp->m_ddev_targp, 285 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), 286 BTOBB(mp->m_sb.sb_blocksize), 0); 287 block = XFS_BUF_TO_SBLOCK(bp); 288 memset(block, 0, mp->m_sb.sb_blocksize); 289 INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTC_MAGIC); 290 block->bb_level = 0; 291 INT_SET(block->bb_numrecs, ARCH_CONVERT, 1); 292 INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK); 293 INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK); 294 arec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, 295 block, 1, mp->m_alloc_mxr[0]); 296 INT_SET(arec->ar_startblock, ARCH_CONVERT, 297 XFS_PREALLOC_BLOCKS(mp)); 298 INT_SET(arec->ar_blockcount, ARCH_CONVERT, 299 agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT)); 300 nfree += INT_GET(arec->ar_blockcount, ARCH_CONVERT); 301 error = xfs_bwrite(mp, bp); 302 if (error) { 303 goto error0; 304 } 305 /* 306 * INO btree root block 307 */ 308 bp = xfs_buf_get(mp->m_ddev_targp, 309 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), 310 BTOBB(mp->m_sb.sb_blocksize), 0); 311 block = XFS_BUF_TO_SBLOCK(bp); 312 memset(block, 0, mp->m_sb.sb_blocksize); 313 INT_SET(block->bb_magic, ARCH_CONVERT, XFS_IBT_MAGIC); 314 block->bb_level = 0; 315 block->bb_numrecs = 0; 316 INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK); 317 INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK); 318 error = xfs_bwrite(mp, bp); 319 if (error) { 320 goto error0; 321 } 322 } 323 xfs_trans_agblocks_delta(tp, nfree); 324 /* 325 * There are new blocks in the old last a.g. 326 */ 327 if (new) { 328 /* 329 * Change the agi length. 330 */ 331 error = xfs_ialloc_read_agi(mp, tp, agno, &bp); 332 if (error) { 333 goto error0; 334 } 335 ASSERT(bp); 336 agi = XFS_BUF_TO_AGI(bp); 337 INT_MOD(agi->agi_length, ARCH_CONVERT, new); 338 ASSERT(nagcount == oagcount || 339 INT_GET(agi->agi_length, ARCH_CONVERT) == 340 mp->m_sb.sb_agblocks); 341 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); 342 /* 343 * Change agf length. 344 */ 345 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); 346 if (error) { 347 goto error0; 348 } 349 ASSERT(bp); 350 agf = XFS_BUF_TO_AGF(bp); 351 INT_MOD(agf->agf_length, ARCH_CONVERT, new); 352 ASSERT(INT_GET(agf->agf_length, ARCH_CONVERT) == 353 INT_GET(agi->agi_length, ARCH_CONVERT)); 354 /* 355 * Free the new space. 356 */ 357 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, 358 INT_GET(agf->agf_length, ARCH_CONVERT) - new), new); 359 if (error) { 360 goto error0; 361 } 362 } 363 if (nagcount > oagcount) 364 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); 365 if (nb > mp->m_sb.sb_dblocks) 366 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, 367 nb - mp->m_sb.sb_dblocks); 368 if (nfree) 369 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); 370 if (dpct) 371 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); 372 error = xfs_trans_commit(tp, 0, NULL); 373 if (error) { 374 return error; 375 } 376 /* New allocation groups fully initialized, so update mount struct */ 377 if (nagimax) 378 mp->m_maxagi = nagimax; 379 if (mp->m_sb.sb_imax_pct) { 380 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; 381 do_div(icount, 100); 382 mp->m_maxicount = icount << mp->m_sb.sb_inopblog; 383 } else 384 mp->m_maxicount = 0; 385 for (agno = 1; agno < nagcount; agno++) { 386 error = xfs_read_buf(mp, mp->m_ddev_targp, 387 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), 388 XFS_FSS_TO_BB(mp, 1), 0, &bp); 389 if (error) { 390 xfs_fs_cmn_err(CE_WARN, mp, 391 "error %d reading secondary superblock for ag %d", 392 error, agno); 393 break; 394 } 395 sbp = XFS_BUF_TO_SBP(bp); 396 xfs_xlatesb(sbp, &mp->m_sb, -1, XFS_SB_ALL_BITS); 397 /* 398 * If we get an error writing out the alternate superblocks, 399 * just issue a warning and continue. The real work is 400 * already done and committed. 401 */ 402 if (!(error = xfs_bwrite(mp, bp))) { 403 continue; 404 } else { 405 xfs_fs_cmn_err(CE_WARN, mp, 406 "write error %d updating secondary superblock for ag %d", 407 error, agno); 408 break; /* no point in continuing */ 409 } 410 } 411 return 0; 412 413 error0: 414 xfs_trans_cancel(tp, XFS_TRANS_ABORT); 415 return error; 416 } 417 418 static int 419 xfs_growfs_log_private( 420 xfs_mount_t *mp, /* mount point for filesystem */ 421 xfs_growfs_log_t *in) /* growfs log input struct */ 422 { 423 xfs_extlen_t nb; 424 425 nb = in->newblocks; 426 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) 427 return XFS_ERROR(EINVAL); 428 if (nb == mp->m_sb.sb_logblocks && 429 in->isint == (mp->m_sb.sb_logstart != 0)) 430 return XFS_ERROR(EINVAL); 431 /* 432 * Moving the log is hard, need new interfaces to sync 433 * the log first, hold off all activity while moving it. 434 * Can have shorter or longer log in the same space, 435 * or transform internal to external log or vice versa. 436 */ 437 return XFS_ERROR(ENOSYS); 438 } 439 440 /* 441 * protected versions of growfs function acquire and release locks on the mount 442 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, 443 * XFS_IOC_FSGROWFSRT 444 */ 445 446 447 int 448 xfs_growfs_data( 449 xfs_mount_t *mp, 450 xfs_growfs_data_t *in) 451 { 452 int error; 453 if (!cpsema(&mp->m_growlock)) 454 return XFS_ERROR(EWOULDBLOCK); 455 error = xfs_growfs_data_private(mp, in); 456 vsema(&mp->m_growlock); 457 return error; 458 } 459 460 int 461 xfs_growfs_log( 462 xfs_mount_t *mp, 463 xfs_growfs_log_t *in) 464 { 465 int error; 466 if (!cpsema(&mp->m_growlock)) 467 return XFS_ERROR(EWOULDBLOCK); 468 error = xfs_growfs_log_private(mp, in); 469 vsema(&mp->m_growlock); 470 return error; 471 } 472 473 /* 474 * exported through ioctl XFS_IOC_FSCOUNTS 475 */ 476 477 int 478 xfs_fs_counts( 479 xfs_mount_t *mp, 480 xfs_fsop_counts_t *cnt) 481 { 482 unsigned long s; 483 484 s = XFS_SB_LOCK(mp); 485 cnt->freedata = mp->m_sb.sb_fdblocks; 486 cnt->freertx = mp->m_sb.sb_frextents; 487 cnt->freeino = mp->m_sb.sb_ifree; 488 cnt->allocino = mp->m_sb.sb_icount; 489 XFS_SB_UNLOCK(mp, s); 490 return 0; 491 } 492 493 /* 494 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS 495 * 496 * xfs_reserve_blocks is called to set m_resblks 497 * in the in-core mount table. The number of unused reserved blocks 498 * is kept in m_resbls_avail. 499 * 500 * Reserve the requested number of blocks if available. Otherwise return 501 * as many as possible to satisfy the request. The actual number 502 * reserved are returned in outval 503 * 504 * A null inval pointer indicates that only the current reserved blocks 505 * available should be returned no settings are changed. 506 */ 507 508 int 509 xfs_reserve_blocks( 510 xfs_mount_t *mp, 511 __uint64_t *inval, 512 xfs_fsop_resblks_t *outval) 513 { 514 __int64_t lcounter, delta; 515 __uint64_t request; 516 unsigned long s; 517 518 /* If inval is null, report current values and return */ 519 520 if (inval == (__uint64_t *)NULL) { 521 outval->resblks = mp->m_resblks; 522 outval->resblks_avail = mp->m_resblks_avail; 523 return(0); 524 } 525 526 request = *inval; 527 s = XFS_SB_LOCK(mp); 528 529 /* 530 * If our previous reservation was larger than the current value, 531 * then move any unused blocks back to the free pool. 532 */ 533 534 if (mp->m_resblks > request) { 535 lcounter = mp->m_resblks_avail - request; 536 if (lcounter > 0) { /* release unused blocks */ 537 mp->m_sb.sb_fdblocks += lcounter; 538 mp->m_resblks_avail -= lcounter; 539 } 540 mp->m_resblks = request; 541 } else { 542 delta = request - mp->m_resblks; 543 lcounter = mp->m_sb.sb_fdblocks - delta; 544 if (lcounter < 0) { 545 /* We can't satisfy the request, just get what we can */ 546 mp->m_resblks += mp->m_sb.sb_fdblocks; 547 mp->m_resblks_avail += mp->m_sb.sb_fdblocks; 548 mp->m_sb.sb_fdblocks = 0; 549 } else { 550 mp->m_sb.sb_fdblocks = lcounter; 551 mp->m_resblks = request; 552 mp->m_resblks_avail += delta; 553 } 554 } 555 556 outval->resblks = mp->m_resblks; 557 outval->resblks_avail = mp->m_resblks_avail; 558 XFS_SB_UNLOCK(mp, s); 559 return(0); 560 } 561 562 void 563 xfs_fs_log_dummy(xfs_mount_t *mp) 564 { 565 xfs_trans_t *tp; 566 xfs_inode_t *ip; 567 568 569 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1); 570 atomic_inc(&mp->m_active_trans); 571 if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) { 572 xfs_trans_cancel(tp, 0); 573 return; 574 } 575 576 ip = mp->m_rootip; 577 xfs_ilock(ip, XFS_ILOCK_EXCL); 578 579 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 580 xfs_trans_ihold(tp, ip); 581 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 582 xfs_trans_set_sync(tp); 583 xfs_trans_commit(tp, 0, NULL); 584 585 xfs_iunlock(ip, XFS_ILOCK_EXCL); 586 } 587 588 int 589 xfs_fs_goingdown( 590 xfs_mount_t *mp, 591 __uint32_t inflags) 592 { 593 switch (inflags) { 594 case XFS_FSOP_GOING_FLAGS_DEFAULT: { 595 struct vfs *vfsp = XFS_MTOVFS(mp); 596 struct super_block *sb = freeze_bdev(vfsp->vfs_super->s_bdev); 597 598 if (sb) { 599 xfs_force_shutdown(mp, XFS_FORCE_UMOUNT); 600 thaw_bdev(sb->s_bdev, sb); 601 } 602 603 break; 604 } 605 case XFS_FSOP_GOING_FLAGS_LOGFLUSH: 606 xfs_force_shutdown(mp, XFS_FORCE_UMOUNT); 607 break; 608 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: 609 xfs_force_shutdown(mp, XFS_FORCE_UMOUNT|XFS_LOG_IO_ERROR); 610 break; 611 default: 612 return XFS_ERROR(EINVAL); 613 } 614 615 return 0; 616 } 617