| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_types.h" |
| #include "xfs_log.h" |
| #include "xfs_trans.h" |
| #include "xfs_sb.h" |
| #include "xfs_ag.h" |
| #include "xfs_mount.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_alloc_btree.h" |
| #include "xfs_ialloc_btree.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_inode_item.h" |
| #include "xfs_btree.h" |
| #include "xfs_error.h" |
| #include "xfs_alloc.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_fsops.h" |
| #include "xfs_itable.h" |
| #include "xfs_trans_space.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_filestream.h" |
| #include "xfs_trace.h" |
| |
| /* |
| * File system operations |
| */ |
| |
| int |
| xfs_fs_geometry( |
| xfs_mount_t *mp, |
| xfs_fsop_geom_t *geo, |
| int new_version) |
| { |
| |
| memset(geo, 0, sizeof(*geo)); |
| |
| geo->blocksize = mp->m_sb.sb_blocksize; |
| geo->rtextsize = mp->m_sb.sb_rextsize; |
| geo->agblocks = mp->m_sb.sb_agblocks; |
| geo->agcount = mp->m_sb.sb_agcount; |
| geo->logblocks = mp->m_sb.sb_logblocks; |
| geo->sectsize = mp->m_sb.sb_sectsize; |
| geo->inodesize = mp->m_sb.sb_inodesize; |
| geo->imaxpct = mp->m_sb.sb_imax_pct; |
| geo->datablocks = mp->m_sb.sb_dblocks; |
| geo->rtblocks = mp->m_sb.sb_rblocks; |
| geo->rtextents = mp->m_sb.sb_rextents; |
| geo->logstart = mp->m_sb.sb_logstart; |
| ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); |
| memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); |
| if (new_version >= 2) { |
| geo->sunit = mp->m_sb.sb_unit; |
| geo->swidth = mp->m_sb.sb_width; |
| } |
| if (new_version >= 3) { |
| geo->version = XFS_FSOP_GEOM_VERSION; |
| geo->flags = |
| (xfs_sb_version_hasattr(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_ATTR : 0) | |
| (xfs_sb_version_hasnlink(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_NLINK : 0) | |
| (xfs_sb_version_hasquota(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | |
| (xfs_sb_version_hasalign(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | |
| (xfs_sb_version_hasdalign(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | |
| (xfs_sb_version_hasshared(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_SHARED : 0) | |
| (xfs_sb_version_hasextflgbit(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | |
| (xfs_sb_version_hasdirv2(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | |
| (xfs_sb_version_hassector(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | |
| (xfs_sb_version_hasasciici(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) | |
| (xfs_sb_version_haslazysbcount(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | |
| (xfs_sb_version_hasattr2(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) | |
| (xfs_sb_version_hasprojid32bit(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_PROJID32 : 0) | |
| (xfs_sb_version_hascrc(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_V5SB : 0); |
| geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? |
| mp->m_sb.sb_logsectsize : BBSIZE; |
| geo->rtsectsize = mp->m_sb.sb_blocksize; |
| geo->dirblocksize = mp->m_dirblksize; |
| } |
| if (new_version >= 4) { |
| geo->flags |= |
| (xfs_sb_version_haslogv2(&mp->m_sb) ? |
| XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); |
| geo->logsunit = mp->m_sb.sb_logsunit; |
| } |
| return 0; |
| } |
| |
| static struct xfs_buf * |
| xfs_growfs_get_hdr_buf( |
| struct xfs_mount *mp, |
| xfs_daddr_t blkno, |
| size_t numblks, |
| int flags, |
| const struct xfs_buf_ops *ops) |
| { |
| struct xfs_buf *bp; |
| |
| bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags); |
| if (!bp) |
| return NULL; |
| |
| xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); |
| bp->b_bn = blkno; |
| bp->b_maps[0].bm_bn = blkno; |
| bp->b_ops = ops; |
| |
| return bp; |
| } |
| |
| static int |
| xfs_growfs_data_private( |
| xfs_mount_t *mp, /* mount point for filesystem */ |
| xfs_growfs_data_t *in) /* growfs data input struct */ |
| { |
| xfs_agf_t *agf; |
| struct xfs_agfl *agfl; |
| xfs_agi_t *agi; |
| xfs_agnumber_t agno; |
| xfs_extlen_t agsize; |
| xfs_extlen_t tmpsize; |
| xfs_alloc_rec_t *arec; |
| xfs_buf_t *bp; |
| int bucket; |
| int dpct; |
| int error; |
| xfs_agnumber_t nagcount; |
| xfs_agnumber_t nagimax = 0; |
| xfs_rfsblock_t nb, nb_mod; |
| xfs_rfsblock_t new; |
| xfs_rfsblock_t nfree; |
| xfs_agnumber_t oagcount; |
| int pct; |
| xfs_trans_t *tp; |
| |
| nb = in->newblocks; |
| pct = in->imaxpct; |
| if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) |
| return XFS_ERROR(EINVAL); |
| if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) |
| return error; |
| dpct = pct - mp->m_sb.sb_imax_pct; |
| bp = xfs_buf_read_uncached(mp->m_ddev_targp, |
| XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), |
| XFS_FSS_TO_BB(mp, 1), 0, NULL); |
| if (!bp) |
| return EIO; |
| if (bp->b_error) { |
| int error = bp->b_error; |
| xfs_buf_relse(bp); |
| return error; |
| } |
| xfs_buf_relse(bp); |
| |
| new = nb; /* use new as a temporary here */ |
| nb_mod = do_div(new, mp->m_sb.sb_agblocks); |
| nagcount = new + (nb_mod != 0); |
| if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { |
| nagcount--; |
| nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks; |
| if (nb < mp->m_sb.sb_dblocks) |
| return XFS_ERROR(EINVAL); |
| } |
| new = nb - mp->m_sb.sb_dblocks; |
| oagcount = mp->m_sb.sb_agcount; |
| |
| /* allocate the new per-ag structures */ |
| if (nagcount > oagcount) { |
| error = xfs_initialize_perag(mp, nagcount, &nagimax); |
| if (error) |
| return error; |
| } |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); |
| tp->t_flags |= XFS_TRANS_RESERVE; |
| if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), |
| XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { |
| xfs_trans_cancel(tp, 0); |
| return error; |
| } |
| |
| /* |
| * Write new AG headers to disk. Non-transactional, but written |
| * synchronously so they are completed prior to the growfs transaction |
| * being logged. |
| */ |
| nfree = 0; |
| for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { |
| __be32 *agfl_bno; |
| |
| /* |
| * AG freespace header block |
| */ |
| bp = xfs_growfs_get_hdr_buf(mp, |
| XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0, |
| &xfs_agf_buf_ops); |
| if (!bp) { |
| error = ENOMEM; |
| goto error0; |
| } |
| |
| agf = XFS_BUF_TO_AGF(bp); |
| agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); |
| agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); |
| agf->agf_seqno = cpu_to_be32(agno); |
| if (agno == nagcount - 1) |
| agsize = |
| nb - |
| (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); |
| else |
| agsize = mp->m_sb.sb_agblocks; |
| agf->agf_length = cpu_to_be32(agsize); |
| agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); |
| agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); |
| agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); |
| agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); |
| agf->agf_flfirst = 0; |
| agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); |
| agf->agf_flcount = 0; |
| tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); |
| agf->agf_freeblks = cpu_to_be32(tmpsize); |
| agf->agf_longest = cpu_to_be32(tmpsize); |
| if (xfs_sb_version_hascrc(&mp->m_sb)) |
| uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_uuid); |
| |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) |
| goto error0; |
| |
| /* |
| * AG freelist header block |
| */ |
| bp = xfs_growfs_get_hdr_buf(mp, |
| XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0, |
| &xfs_agfl_buf_ops); |
| if (!bp) { |
| error = ENOMEM; |
| goto error0; |
| } |
| |
| agfl = XFS_BUF_TO_AGFL(bp); |
| if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC); |
| agfl->agfl_seqno = cpu_to_be32(agno); |
| uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_uuid); |
| } |
| |
| agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp); |
| for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++) |
| agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); |
| |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) |
| goto error0; |
| |
| /* |
| * AG inode header block |
| */ |
| bp = xfs_growfs_get_hdr_buf(mp, |
| XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0, |
| &xfs_agi_buf_ops); |
| if (!bp) { |
| error = ENOMEM; |
| goto error0; |
| } |
| |
| agi = XFS_BUF_TO_AGI(bp); |
| agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); |
| agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); |
| agi->agi_seqno = cpu_to_be32(agno); |
| agi->agi_length = cpu_to_be32(agsize); |
| agi->agi_count = 0; |
| agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); |
| agi->agi_level = cpu_to_be32(1); |
| agi->agi_freecount = 0; |
| agi->agi_newino = cpu_to_be32(NULLAGINO); |
| agi->agi_dirino = cpu_to_be32(NULLAGINO); |
| if (xfs_sb_version_hascrc(&mp->m_sb)) |
| uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_uuid); |
| for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) |
| agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
| |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) |
| goto error0; |
| |
| /* |
| * BNO btree root block |
| */ |
| bp = xfs_growfs_get_hdr_buf(mp, |
| XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), |
| BTOBB(mp->m_sb.sb_blocksize), 0, |
| &xfs_allocbt_buf_ops); |
| |
| if (!bp) { |
| error = ENOMEM; |
| goto error0; |
| } |
| |
| if (xfs_sb_version_hascrc(&mp->m_sb)) |
| xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1, |
| agno, XFS_BTREE_CRC_BLOCKS); |
| else |
| xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, |
| agno, 0); |
| |
| arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); |
| arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
| arec->ar_blockcount = cpu_to_be32( |
| agsize - be32_to_cpu(arec->ar_startblock)); |
| |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) |
| goto error0; |
| |
| /* |
| * CNT btree root block |
| */ |
| bp = xfs_growfs_get_hdr_buf(mp, |
| XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), |
| BTOBB(mp->m_sb.sb_blocksize), 0, |
| &xfs_allocbt_buf_ops); |
| if (!bp) { |
| error = ENOMEM; |
| goto error0; |
| } |
| |
| if (xfs_sb_version_hascrc(&mp->m_sb)) |
| xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1, |
| agno, XFS_BTREE_CRC_BLOCKS); |
| else |
| xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, |
| agno, 0); |
| |
| arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); |
| arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
| arec->ar_blockcount = cpu_to_be32( |
| agsize - be32_to_cpu(arec->ar_startblock)); |
| nfree += be32_to_cpu(arec->ar_blockcount); |
| |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) |
| goto error0; |
| |
| /* |
| * INO btree root block |
| */ |
| bp = xfs_growfs_get_hdr_buf(mp, |
| XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), |
| BTOBB(mp->m_sb.sb_blocksize), 0, |
| &xfs_inobt_buf_ops); |
| if (!bp) { |
| error = ENOMEM; |
| goto error0; |
| } |
| |
| if (xfs_sb_version_hascrc(&mp->m_sb)) |
| xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0, |
| agno, XFS_BTREE_CRC_BLOCKS); |
| else |
| xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, |
| agno, 0); |
| |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) |
| goto error0; |
| } |
| xfs_trans_agblocks_delta(tp, nfree); |
| /* |
| * There are new blocks in the old last a.g. |
| */ |
| if (new) { |
| /* |
| * Change the agi length. |
| */ |
| error = xfs_ialloc_read_agi(mp, tp, agno, &bp); |
| if (error) { |
| goto error0; |
| } |
| ASSERT(bp); |
| agi = XFS_BUF_TO_AGI(bp); |
| be32_add_cpu(&agi->agi_length, new); |
| ASSERT(nagcount == oagcount || |
| be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
| xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
| /* |
| * Change agf length. |
| */ |
| error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); |
| if (error) { |
| goto error0; |
| } |
| ASSERT(bp); |
| agf = XFS_BUF_TO_AGF(bp); |
| be32_add_cpu(&agf->agf_length, new); |
| ASSERT(be32_to_cpu(agf->agf_length) == |
| be32_to_cpu(agi->agi_length)); |
| |
| xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
| /* |
| * Free the new space. |
| */ |
| error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, |
| be32_to_cpu(agf->agf_length) - new), new); |
| if (error) { |
| goto error0; |
| } |
| } |
| |
| /* |
| * Update changed superblock fields transactionally. These are not |
| * seen by the rest of the world until the transaction commit applies |
| * them atomically to the superblock. |
| */ |
| if (nagcount > oagcount) |
| xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); |
| if (nb > mp->m_sb.sb_dblocks) |
| xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, |
| nb - mp->m_sb.sb_dblocks); |
| if (nfree) |
| xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); |
| if (dpct) |
| xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); |
| error = xfs_trans_commit(tp, 0); |
| if (error) |
| return error; |
| |
| /* New allocation groups fully initialized, so update mount struct */ |
| if (nagimax) |
| mp->m_maxagi = nagimax; |
| if (mp->m_sb.sb_imax_pct) { |
| __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; |
| do_div(icount, 100); |
| mp->m_maxicount = icount << mp->m_sb.sb_inopblog; |
| } else |
| mp->m_maxicount = 0; |
| xfs_set_low_space_thresholds(mp); |
| |
| /* update secondary superblocks. */ |
| for (agno = 1; agno < nagcount; agno++) { |
| error = 0; |
| /* |
| * new secondary superblocks need to be zeroed, not read from |
| * disk as the contents of the new area we are growing into is |
| * completely unknown. |
| */ |
| if (agno < oagcount) { |
| error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, |
| XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0, &bp, |
| &xfs_sb_buf_ops); |
| } else { |
| bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp, |
| XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |
| XFS_FSS_TO_BB(mp, 1), 0); |
| if (bp) { |
| bp->b_ops = &xfs_sb_buf_ops; |
| xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); |
| } else |
| error = ENOMEM; |
| } |
| |
| if (error) { |
| xfs_warn(mp, |
| "error %d reading secondary superblock for ag %d", |
| error, agno); |
| break; |
| } |
| xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); |
| |
| /* |
| * If we get an error writing out the alternate superblocks, |
| * just issue a warning and continue. The real work is |
| * already done and committed. |
| */ |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| if (error) { |
| xfs_warn(mp, |
| "write error %d updating secondary superblock for ag %d", |
| error, agno); |
| break; /* no point in continuing */ |
| } |
| } |
| return error; |
| |
| error0: |
| xfs_trans_cancel(tp, XFS_TRANS_ABORT); |
| return error; |
| } |
| |
| static int |
| xfs_growfs_log_private( |
| xfs_mount_t *mp, /* mount point for filesystem */ |
| xfs_growfs_log_t *in) /* growfs log input struct */ |
| { |
| xfs_extlen_t nb; |
| |
| nb = in->newblocks; |
| if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) |
| return XFS_ERROR(EINVAL); |
| if (nb == mp->m_sb.sb_logblocks && |
| in->isint == (mp->m_sb.sb_logstart != 0)) |
| return XFS_ERROR(EINVAL); |
| /* |
| * Moving the log is hard, need new interfaces to sync |
| * the log first, hold off all activity while moving it. |
| * Can have shorter or longer log in the same space, |
| * or transform internal to external log or vice versa. |
| */ |
| return XFS_ERROR(ENOSYS); |
| } |
| |
| /* |
| * protected versions of growfs function acquire and release locks on the mount |
| * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, |
| * XFS_IOC_FSGROWFSRT |
| */ |
| |
| |
| int |
| xfs_growfs_data( |
| xfs_mount_t *mp, |
| xfs_growfs_data_t *in) |
| { |
| int error; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return XFS_ERROR(EPERM); |
| if (!mutex_trylock(&mp->m_growlock)) |
| return XFS_ERROR(EWOULDBLOCK); |
| error = xfs_growfs_data_private(mp, in); |
| mutex_unlock(&mp->m_growlock); |
| return error; |
| } |
| |
| int |
| xfs_growfs_log( |
| xfs_mount_t *mp, |
| xfs_growfs_log_t *in) |
| { |
| int error; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return XFS_ERROR(EPERM); |
| if (!mutex_trylock(&mp->m_growlock)) |
| return XFS_ERROR(EWOULDBLOCK); |
| error = xfs_growfs_log_private(mp, in); |
| mutex_unlock(&mp->m_growlock); |
| return error; |
| } |
| |
| /* |
| * exported through ioctl XFS_IOC_FSCOUNTS |
| */ |
| |
| int |
| xfs_fs_counts( |
| xfs_mount_t *mp, |
| xfs_fsop_counts_t *cnt) |
| { |
| xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
| spin_lock(&mp->m_sb_lock); |
| cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
| cnt->freertx = mp->m_sb.sb_frextents; |
| cnt->freeino = mp->m_sb.sb_ifree; |
| cnt->allocino = mp->m_sb.sb_icount; |
| spin_unlock(&mp->m_sb_lock); |
| return 0; |
| } |
| |
| /* |
| * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS |
| * |
| * xfs_reserve_blocks is called to set m_resblks |
| * in the in-core mount table. The number of unused reserved blocks |
| * is kept in m_resblks_avail. |
| * |
| * Reserve the requested number of blocks if available. Otherwise return |
| * as many as possible to satisfy the request. The actual number |
| * reserved are returned in outval |
| * |
| * A null inval pointer indicates that only the current reserved blocks |
| * available should be returned no settings are changed. |
| */ |
| |
| int |
| xfs_reserve_blocks( |
| xfs_mount_t *mp, |
| __uint64_t *inval, |
| xfs_fsop_resblks_t *outval) |
| { |
| __int64_t lcounter, delta, fdblks_delta; |
| __uint64_t request; |
| |
| /* If inval is null, report current values and return */ |
| if (inval == (__uint64_t *)NULL) { |
| if (!outval) |
| return EINVAL; |
| outval->resblks = mp->m_resblks; |
| outval->resblks_avail = mp->m_resblks_avail; |
| return 0; |
| } |
| |
| request = *inval; |
| |
| /* |
| * With per-cpu counters, this becomes an interesting |
| * problem. we needto work out if we are freeing or allocation |
| * blocks first, then we can do the modification as necessary. |
| * |
| * We do this under the m_sb_lock so that if we are near |
| * ENOSPC, we will hold out any changes while we work out |
| * what to do. This means that the amount of free space can |
| * change while we do this, so we need to retry if we end up |
| * trying to reserve more space than is available. |
| * |
| * We also use the xfs_mod_incore_sb() interface so that we |
| * don't have to care about whether per cpu counter are |
| * enabled, disabled or even compiled in.... |
| */ |
| retry: |
| spin_lock(&mp->m_sb_lock); |
| xfs_icsb_sync_counters_locked(mp, 0); |
| |
| /* |
| * If our previous reservation was larger than the current value, |
| * then move any unused blocks back to the free pool. |
| */ |
| fdblks_delta = 0; |
| if (mp->m_resblks > request) { |
| lcounter = mp->m_resblks_avail - request; |
| if (lcounter > 0) { /* release unused blocks */ |
| fdblks_delta = lcounter; |
| mp->m_resblks_avail -= lcounter; |
| } |
| mp->m_resblks = request; |
| } else { |
| __int64_t free; |
| |
| free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
| if (!free) |
| goto out; /* ENOSPC and fdblks_delta = 0 */ |
| |
| delta = request - mp->m_resblks; |
| lcounter = free - delta; |
| if (lcounter < 0) { |
| /* We can't satisfy the request, just get what we can */ |
| mp->m_resblks += free; |
| mp->m_resblks_avail += free; |
| fdblks_delta = -free; |
| } else { |
| fdblks_delta = -delta; |
| mp->m_resblks = request; |
| mp->m_resblks_avail += delta; |
| } |
| } |
| out: |
| if (outval) { |
| outval->resblks = mp->m_resblks; |
| outval->resblks_avail = mp->m_resblks_avail; |
| } |
| spin_unlock(&mp->m_sb_lock); |
| |
| if (fdblks_delta) { |
| /* |
| * If we are putting blocks back here, m_resblks_avail is |
| * already at its max so this will put it in the free pool. |
| * |
| * If we need space, we'll either succeed in getting it |
| * from the free block count or we'll get an enospc. If |
| * we get a ENOSPC, it means things changed while we were |
| * calculating fdblks_delta and so we should try again to |
| * see if there is anything left to reserve. |
| * |
| * Don't set the reserved flag here - we don't want to reserve |
| * the extra reserve blocks from the reserve..... |
| */ |
| int error; |
| error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
| fdblks_delta, 0); |
| if (error == ENOSPC) |
| goto retry; |
| } |
| return 0; |
| } |
| |
| /* |
| * Dump a transaction into the log that contains no real change. This is needed |
| * to be able to make the log dirty or stamp the current tail LSN into the log |
| * during the covering operation. |
| * |
| * We cannot use an inode here for this - that will push dirty state back up |
| * into the VFS and then periodic inode flushing will prevent log covering from |
| * making progress. Hence we log a field in the superblock instead and use a |
| * synchronous transaction to ensure the superblock is immediately unpinned |
| * and can be written back. |
| */ |
| int |
| xfs_fs_log_dummy( |
| xfs_mount_t *mp) |
| { |
| xfs_trans_t *tp; |
| int error; |
| |
| tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP); |
| error = xfs_trans_reserve(tp, 0, XFS_SB_LOG_RES(mp), 0, 0, |
| XFS_DEFAULT_LOG_COUNT); |
| if (error) { |
| xfs_trans_cancel(tp, 0); |
| return error; |
| } |
| |
| /* log the UUID because it is an unchanging field */ |
| xfs_mod_sb(tp, XFS_SB_UUID); |
| xfs_trans_set_sync(tp); |
| return xfs_trans_commit(tp, 0); |
| } |
| |
| int |
| xfs_fs_goingdown( |
| xfs_mount_t *mp, |
| __uint32_t inflags) |
| { |
| switch (inflags) { |
| case XFS_FSOP_GOING_FLAGS_DEFAULT: { |
| struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); |
| |
| if (sb && !IS_ERR(sb)) { |
| xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
| thaw_bdev(sb->s_bdev, sb); |
| } |
| |
| break; |
| } |
| case XFS_FSOP_GOING_FLAGS_LOGFLUSH: |
| xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
| break; |
| case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: |
| xfs_force_shutdown(mp, |
| SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); |
| break; |
| default: |
| return XFS_ERROR(EINVAL); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Force a shutdown of the filesystem instantly while keeping the filesystem |
| * consistent. We don't do an unmount here; just shutdown the shop, make sure |
| * that absolutely nothing persistent happens to this filesystem after this |
| * point. |
| */ |
| void |
| xfs_do_force_shutdown( |
| xfs_mount_t *mp, |
| int flags, |
| char *fname, |
| int lnnum) |
| { |
| int logerror; |
| |
| logerror = flags & SHUTDOWN_LOG_IO_ERROR; |
| |
| if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { |
| xfs_notice(mp, |
| "%s(0x%x) called from line %d of file %s. Return address = 0x%p", |
| __func__, flags, lnnum, fname, __return_address); |
| } |
| /* |
| * No need to duplicate efforts. |
| */ |
| if (XFS_FORCED_SHUTDOWN(mp) && !logerror) |
| return; |
| |
| /* |
| * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't |
| * queue up anybody new on the log reservations, and wakes up |
| * everybody who's sleeping on log reservations to tell them |
| * the bad news. |
| */ |
| if (xfs_log_force_umount(mp, logerror)) |
| return; |
| |
| if (flags & SHUTDOWN_CORRUPT_INCORE) { |
| xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, |
| "Corruption of in-memory data detected. Shutting down filesystem"); |
| if (XFS_ERRLEVEL_HIGH <= xfs_error_level) |
| xfs_stack_trace(); |
| } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { |
| if (logerror) { |
| xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, |
| "Log I/O Error Detected. Shutting down filesystem"); |
| } else if (flags & SHUTDOWN_DEVICE_REQ) { |
| xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, |
| "All device paths lost. Shutting down filesystem"); |
| } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { |
| xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, |
| "I/O Error Detected. Shutting down filesystem"); |
| } |
| } |
| if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { |
| xfs_alert(mp, |
| "Please umount the filesystem and rectify the problem(s)"); |
| } |
| } |