Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | } |