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![Christoph Hellwig](/assets/img/avatar_default.png)
structures. Always use the generic xfs_btree_block type instead of the short / long structures. Add XFS_BTREE_SBLOCK_LEN / XFS_BTREE_LBLOCK_LEN defines for the length of a short / long form block. The rationale for this is that we will grow more btree block header variants to support CRCs and other RAS information, and always accessing them through the same datatype with unions for the short / long form pointers makes implementing this much easier. SGI-PV: 988146 SGI-Modid: xfs-linux-melb:xfs-kern:32300a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Donald Douwsma <donaldd@sgi.com> Signed-off-by: David Chinner <david@fromorbit.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
645 lines
18 KiB
C
645 lines
18 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_bit.h"
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#include "xfs_inum.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_btree.h"
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#include "xfs_error.h"
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#include "xfs_alloc.h"
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#include "xfs_ialloc.h"
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#include "xfs_fsops.h"
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#include "xfs_itable.h"
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#include "xfs_trans_space.h"
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#include "xfs_rtalloc.h"
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#include "xfs_rw.h"
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#include "xfs_filestream.h"
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/*
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* File system operations
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*/
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int
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xfs_fs_geometry(
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xfs_mount_t *mp,
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xfs_fsop_geom_t *geo,
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int new_version)
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{
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geo->blocksize = mp->m_sb.sb_blocksize;
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geo->rtextsize = mp->m_sb.sb_rextsize;
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geo->agblocks = mp->m_sb.sb_agblocks;
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geo->agcount = mp->m_sb.sb_agcount;
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geo->logblocks = mp->m_sb.sb_logblocks;
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geo->sectsize = mp->m_sb.sb_sectsize;
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geo->inodesize = mp->m_sb.sb_inodesize;
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geo->imaxpct = mp->m_sb.sb_imax_pct;
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geo->datablocks = mp->m_sb.sb_dblocks;
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geo->rtblocks = mp->m_sb.sb_rblocks;
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geo->rtextents = mp->m_sb.sb_rextents;
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geo->logstart = mp->m_sb.sb_logstart;
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ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
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memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
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if (new_version >= 2) {
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geo->sunit = mp->m_sb.sb_unit;
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geo->swidth = mp->m_sb.sb_width;
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}
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if (new_version >= 3) {
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geo->version = XFS_FSOP_GEOM_VERSION;
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geo->flags =
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(xfs_sb_version_hasattr(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
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(xfs_sb_version_hasnlink(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
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(xfs_sb_version_hasquota(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
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(xfs_sb_version_hasalign(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
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(xfs_sb_version_hasdalign(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
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(xfs_sb_version_hasshared(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
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(xfs_sb_version_hasextflgbit(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
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(xfs_sb_version_hasdirv2(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
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(xfs_sb_version_hassector(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
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(xfs_sb_version_hasasciici(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
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(xfs_sb_version_haslazysbcount(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
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(xfs_sb_version_hasattr2(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
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geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
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mp->m_sb.sb_logsectsize : BBSIZE;
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geo->rtsectsize = mp->m_sb.sb_blocksize;
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geo->dirblocksize = mp->m_dirblksize;
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}
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if (new_version >= 4) {
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geo->flags |=
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(xfs_sb_version_haslogv2(&mp->m_sb) ?
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XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
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geo->logsunit = mp->m_sb.sb_logsunit;
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}
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return 0;
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}
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static int
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xfs_growfs_data_private(
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xfs_mount_t *mp, /* mount point for filesystem */
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xfs_growfs_data_t *in) /* growfs data input struct */
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{
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xfs_agf_t *agf;
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xfs_agi_t *agi;
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xfs_agnumber_t agno;
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xfs_extlen_t agsize;
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xfs_extlen_t tmpsize;
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xfs_alloc_rec_t *arec;
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struct xfs_btree_block *block;
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xfs_buf_t *bp;
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int bucket;
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int dpct;
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int error;
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xfs_agnumber_t nagcount;
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xfs_agnumber_t nagimax = 0;
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xfs_rfsblock_t nb, nb_mod;
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xfs_rfsblock_t new;
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xfs_rfsblock_t nfree;
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xfs_agnumber_t oagcount;
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int pct;
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xfs_trans_t *tp;
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nb = in->newblocks;
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pct = in->imaxpct;
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if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
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return XFS_ERROR(EINVAL);
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if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
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return error;
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dpct = pct - mp->m_sb.sb_imax_pct;
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error = xfs_read_buf(mp, mp->m_ddev_targp,
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XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
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XFS_FSS_TO_BB(mp, 1), 0, &bp);
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if (error)
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return error;
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ASSERT(bp);
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xfs_buf_relse(bp);
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new = nb; /* use new as a temporary here */
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nb_mod = do_div(new, mp->m_sb.sb_agblocks);
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nagcount = new + (nb_mod != 0);
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if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
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nagcount--;
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nb = nagcount * mp->m_sb.sb_agblocks;
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if (nb < mp->m_sb.sb_dblocks)
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return XFS_ERROR(EINVAL);
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}
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new = nb - mp->m_sb.sb_dblocks;
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oagcount = mp->m_sb.sb_agcount;
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if (nagcount > oagcount) {
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xfs_filestream_flush(mp);
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down_write(&mp->m_peraglock);
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mp->m_perag = kmem_realloc(mp->m_perag,
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sizeof(xfs_perag_t) * nagcount,
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sizeof(xfs_perag_t) * oagcount,
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KM_SLEEP);
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memset(&mp->m_perag[oagcount], 0,
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(nagcount - oagcount) * sizeof(xfs_perag_t));
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mp->m_flags |= XFS_MOUNT_32BITINODES;
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nagimax = xfs_initialize_perag(mp, nagcount);
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up_write(&mp->m_peraglock);
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}
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tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
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tp->t_flags |= XFS_TRANS_RESERVE;
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if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
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XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) {
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xfs_trans_cancel(tp, 0);
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return error;
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}
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nfree = 0;
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for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
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/*
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* AG freelist header block
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*/
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bp = xfs_buf_get(mp->m_ddev_targp,
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XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
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XFS_FSS_TO_BB(mp, 1), 0);
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agf = XFS_BUF_TO_AGF(bp);
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memset(agf, 0, mp->m_sb.sb_sectsize);
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agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
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agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
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agf->agf_seqno = cpu_to_be32(agno);
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if (agno == nagcount - 1)
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agsize =
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nb -
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(agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
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else
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agsize = mp->m_sb.sb_agblocks;
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agf->agf_length = cpu_to_be32(agsize);
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agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
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agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
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agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
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agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
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agf->agf_flfirst = 0;
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agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
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agf->agf_flcount = 0;
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tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
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agf->agf_freeblks = cpu_to_be32(tmpsize);
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agf->agf_longest = cpu_to_be32(tmpsize);
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error = xfs_bwrite(mp, bp);
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if (error) {
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goto error0;
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}
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/*
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* AG inode header block
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*/
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bp = xfs_buf_get(mp->m_ddev_targp,
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XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
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XFS_FSS_TO_BB(mp, 1), 0);
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agi = XFS_BUF_TO_AGI(bp);
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memset(agi, 0, mp->m_sb.sb_sectsize);
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agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
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agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
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agi->agi_seqno = cpu_to_be32(agno);
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agi->agi_length = cpu_to_be32(agsize);
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agi->agi_count = 0;
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agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
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agi->agi_level = cpu_to_be32(1);
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agi->agi_freecount = 0;
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agi->agi_newino = cpu_to_be32(NULLAGINO);
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agi->agi_dirino = cpu_to_be32(NULLAGINO);
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for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
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agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
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error = xfs_bwrite(mp, bp);
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if (error) {
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goto error0;
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}
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/*
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* BNO btree root block
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*/
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bp = xfs_buf_get(mp->m_ddev_targp,
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XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
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BTOBB(mp->m_sb.sb_blocksize), 0);
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block = XFS_BUF_TO_BLOCK(bp);
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memset(block, 0, mp->m_sb.sb_blocksize);
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block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
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block->bb_level = 0;
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block->bb_numrecs = cpu_to_be16(1);
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block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
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block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
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arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
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arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
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arec->ar_blockcount = cpu_to_be32(
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agsize - be32_to_cpu(arec->ar_startblock));
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error = xfs_bwrite(mp, bp);
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if (error) {
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goto error0;
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}
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/*
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* CNT btree root block
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*/
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bp = xfs_buf_get(mp->m_ddev_targp,
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XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
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BTOBB(mp->m_sb.sb_blocksize), 0);
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block = XFS_BUF_TO_BLOCK(bp);
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memset(block, 0, mp->m_sb.sb_blocksize);
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block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
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block->bb_level = 0;
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block->bb_numrecs = cpu_to_be16(1);
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block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
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block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
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arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
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arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
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arec->ar_blockcount = cpu_to_be32(
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agsize - be32_to_cpu(arec->ar_startblock));
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nfree += be32_to_cpu(arec->ar_blockcount);
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error = xfs_bwrite(mp, bp);
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if (error) {
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goto error0;
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}
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/*
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* INO btree root block
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*/
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bp = xfs_buf_get(mp->m_ddev_targp,
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XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
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BTOBB(mp->m_sb.sb_blocksize), 0);
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block = XFS_BUF_TO_BLOCK(bp);
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memset(block, 0, mp->m_sb.sb_blocksize);
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block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
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block->bb_level = 0;
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block->bb_numrecs = 0;
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block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
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block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
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error = xfs_bwrite(mp, bp);
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if (error) {
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goto error0;
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}
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}
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xfs_trans_agblocks_delta(tp, nfree);
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/*
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* There are new blocks in the old last a.g.
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*/
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if (new) {
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/*
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* Change the agi length.
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*/
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error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
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if (error) {
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goto error0;
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}
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ASSERT(bp);
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agi = XFS_BUF_TO_AGI(bp);
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be32_add_cpu(&agi->agi_length, new);
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ASSERT(nagcount == oagcount ||
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be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
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xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
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/*
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* Change agf length.
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*/
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error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
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if (error) {
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goto error0;
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}
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ASSERT(bp);
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agf = XFS_BUF_TO_AGF(bp);
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be32_add_cpu(&agf->agf_length, new);
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ASSERT(be32_to_cpu(agf->agf_length) ==
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be32_to_cpu(agi->agi_length));
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xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
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/*
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* Free the new space.
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*/
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error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
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be32_to_cpu(agf->agf_length) - new), new);
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if (error) {
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goto error0;
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}
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}
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if (nagcount > oagcount)
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xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
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if (nb > mp->m_sb.sb_dblocks)
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xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
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nb - mp->m_sb.sb_dblocks);
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if (nfree)
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xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
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if (dpct)
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xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
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error = xfs_trans_commit(tp, 0);
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if (error) {
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return error;
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}
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/* New allocation groups fully initialized, so update mount struct */
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if (nagimax)
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mp->m_maxagi = nagimax;
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if (mp->m_sb.sb_imax_pct) {
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__uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
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do_div(icount, 100);
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mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
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} else
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mp->m_maxicount = 0;
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for (agno = 1; agno < nagcount; agno++) {
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error = xfs_read_buf(mp, mp->m_ddev_targp,
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XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
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XFS_FSS_TO_BB(mp, 1), 0, &bp);
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if (error) {
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xfs_fs_cmn_err(CE_WARN, mp,
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"error %d reading secondary superblock for ag %d",
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error, agno);
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break;
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}
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xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
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/*
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* If we get an error writing out the alternate superblocks,
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|
* just issue a warning and continue. The real work is
|
|
* already done and committed.
|
|
*/
|
|
if (!(error = xfs_bwrite(mp, bp))) {
|
|
continue;
|
|
} else {
|
|
xfs_fs_cmn_err(CE_WARN, mp,
|
|
"write error %d updating secondary superblock for ag %d",
|
|
error, agno);
|
|
break; /* no point in continuing */
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
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 (!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 (!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 it's 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_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, fdblks_delta, 0);
|
|
if (error == ENOSPC)
|
|
goto retry;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
xfs_fs_log_dummy(
|
|
xfs_mount_t *mp)
|
|
{
|
|
xfs_trans_t *tp;
|
|
xfs_inode_t *ip;
|
|
|
|
tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
|
|
if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return;
|
|
}
|
|
|
|
ip = mp->m_rootip;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ihold(tp, ip);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
xfs_trans_set_sync(tp);
|
|
xfs_trans_commit(tp, 0);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
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;
|
|
}
|