617 lines
17 KiB
C
617 lines
17 KiB
C
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/*
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* Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#include "xfs.h"
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#include "xfs_macros.h"
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#include "xfs_types.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_dir.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_ag.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_ialloc_btree.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_rw.h"
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#include "xfs_refcache.h"
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#include "xfs_trans_space.h"
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#include "xfs_rtalloc.h"
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#include "xfs_dir2.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dir_sf.h"
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#include "xfs_dir2_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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/*
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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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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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xfs_btree_sblock_t *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_sb_t *sbp;
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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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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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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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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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INT_SET(agf->agf_magicnum, ARCH_CONVERT, XFS_AGF_MAGIC);
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INT_SET(agf->agf_versionnum, ARCH_CONVERT, XFS_AGF_VERSION);
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INT_SET(agf->agf_seqno, ARCH_CONVERT, 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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INT_SET(agf->agf_length, ARCH_CONVERT, agsize);
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INT_SET(agf->agf_roots[XFS_BTNUM_BNOi], ARCH_CONVERT,
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XFS_BNO_BLOCK(mp));
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INT_SET(agf->agf_roots[XFS_BTNUM_CNTi], ARCH_CONVERT,
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XFS_CNT_BLOCK(mp));
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INT_SET(agf->agf_levels[XFS_BTNUM_BNOi], ARCH_CONVERT, 1);
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INT_SET(agf->agf_levels[XFS_BTNUM_CNTi], ARCH_CONVERT, 1);
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agf->agf_flfirst = 0;
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INT_SET(agf->agf_fllast, ARCH_CONVERT, 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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INT_SET(agf->agf_freeblks, ARCH_CONVERT, tmpsize);
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INT_SET(agf->agf_longest, ARCH_CONVERT, 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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INT_SET(agi->agi_magicnum, ARCH_CONVERT, XFS_AGI_MAGIC);
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INT_SET(agi->agi_versionnum, ARCH_CONVERT, XFS_AGI_VERSION);
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INT_SET(agi->agi_seqno, ARCH_CONVERT, agno);
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INT_SET(agi->agi_length, ARCH_CONVERT, agsize);
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agi->agi_count = 0;
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INT_SET(agi->agi_root, ARCH_CONVERT, XFS_IBT_BLOCK(mp));
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INT_SET(agi->agi_level, ARCH_CONVERT, 1);
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agi->agi_freecount = 0;
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INT_SET(agi->agi_newino, ARCH_CONVERT, NULLAGINO);
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INT_SET(agi->agi_dirino, ARCH_CONVERT, NULLAGINO);
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for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
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INT_SET(agi->agi_unlinked[bucket], ARCH_CONVERT,
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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_SBLOCK(bp);
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memset(block, 0, mp->m_sb.sb_blocksize);
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INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTB_MAGIC);
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block->bb_level = 0;
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INT_SET(block->bb_numrecs, ARCH_CONVERT, 1);
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INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK);
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INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK);
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arec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc,
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block, 1, mp->m_alloc_mxr[0]);
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INT_SET(arec->ar_startblock, ARCH_CONVERT,
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XFS_PREALLOC_BLOCKS(mp));
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INT_SET(arec->ar_blockcount, ARCH_CONVERT,
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agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT));
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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_SBLOCK(bp);
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memset(block, 0, mp->m_sb.sb_blocksize);
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INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTC_MAGIC);
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block->bb_level = 0;
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INT_SET(block->bb_numrecs, ARCH_CONVERT, 1);
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INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK);
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INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK);
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arec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc,
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block, 1, mp->m_alloc_mxr[0]);
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INT_SET(arec->ar_startblock, ARCH_CONVERT,
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XFS_PREALLOC_BLOCKS(mp));
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INT_SET(arec->ar_blockcount, ARCH_CONVERT,
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agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT));
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nfree += INT_GET(arec->ar_blockcount, ARCH_CONVERT);
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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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|
|
*/
|
||
|
|
bp = xfs_buf_get(mp->m_ddev_targp,
|
||
|
|
XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
|
||
|
|
BTOBB(mp->m_sb.sb_blocksize), 0);
|
||
|
|
block = XFS_BUF_TO_SBLOCK(bp);
|
||
|
|
memset(block, 0, mp->m_sb.sb_blocksize);
|
||
|
|
INT_SET(block->bb_magic, ARCH_CONVERT, XFS_IBT_MAGIC);
|
||
|
|
block->bb_level = 0;
|
||
|
|
block->bb_numrecs = 0;
|
||
|
|
INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK);
|
||
|
|
INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK);
|
||
|
|
error = xfs_bwrite(mp, 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);
|
||
|
|
INT_MOD(agi->agi_length, ARCH_CONVERT, new);
|
||
|
|
ASSERT(nagcount == oagcount ||
|
||
|
|
INT_GET(agi->agi_length, ARCH_CONVERT) ==
|
||
|
|
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);
|
||
|
|
INT_MOD(agf->agf_length, ARCH_CONVERT, new);
|
||
|
|
ASSERT(INT_GET(agf->agf_length, ARCH_CONVERT) ==
|
||
|
|
INT_GET(agi->agi_length, ARCH_CONVERT));
|
||
|
|
/*
|
||
|
|
* Free the new space.
|
||
|
|
*/
|
||
|
|
error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
|
||
|
|
INT_GET(agf->agf_length, ARCH_CONVERT) - new), new);
|
||
|
|
if (error) {
|
||
|
|
goto error0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
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, NULL);
|
||
|
|
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;
|
||
|
|
for (agno = 1; agno < nagcount; agno++) {
|
||
|
|
error = xfs_read_buf(mp, mp->m_ddev_targp,
|
||
|
|
XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
|
||
|
|
XFS_FSS_TO_BB(mp, 1), 0, &bp);
|
||
|
|
if (error) {
|
||
|
|
xfs_fs_cmn_err(CE_WARN, mp,
|
||
|
|
"error %d reading secondary superblock for ag %d",
|
||
|
|
error, agno);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
sbp = XFS_BUF_TO_SBP(bp);
|
||
|
|
xfs_xlatesb(sbp, &mp->m_sb, -1, 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.
|
||
|
|
*/
|
||
|
|
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 (!cpsema(&mp->m_growlock))
|
||
|
|
return XFS_ERROR(EWOULDBLOCK);
|
||
|
|
error = xfs_growfs_data_private(mp, in);
|
||
|
|
vsema(&mp->m_growlock);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
xfs_growfs_log(
|
||
|
|
xfs_mount_t *mp,
|
||
|
|
xfs_growfs_log_t *in)
|
||
|
|
{
|
||
|
|
int error;
|
||
|
|
if (!cpsema(&mp->m_growlock))
|
||
|
|
return XFS_ERROR(EWOULDBLOCK);
|
||
|
|
error = xfs_growfs_log_private(mp, in);
|
||
|
|
vsema(&mp->m_growlock);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* exported through ioctl XFS_IOC_FSCOUNTS
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
xfs_fs_counts(
|
||
|
|
xfs_mount_t *mp,
|
||
|
|
xfs_fsop_counts_t *cnt)
|
||
|
|
{
|
||
|
|
unsigned long s;
|
||
|
|
|
||
|
|
s = XFS_SB_LOCK(mp);
|
||
|
|
cnt->freedata = mp->m_sb.sb_fdblocks;
|
||
|
|
cnt->freertx = mp->m_sb.sb_frextents;
|
||
|
|
cnt->freeino = mp->m_sb.sb_ifree;
|
||
|
|
cnt->allocino = mp->m_sb.sb_icount;
|
||
|
|
XFS_SB_UNLOCK(mp, s);
|
||
|
|
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_resbls_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;
|
||
|
|
__uint64_t request;
|
||
|
|
unsigned long s;
|
||
|
|
|
||
|
|
/* If inval is null, report current values and return */
|
||
|
|
|
||
|
|
if (inval == (__uint64_t *)NULL) {
|
||
|
|
outval->resblks = mp->m_resblks;
|
||
|
|
outval->resblks_avail = mp->m_resblks_avail;
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
request = *inval;
|
||
|
|
s = XFS_SB_LOCK(mp);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If our previous reservation was larger than the current value,
|
||
|
|
* then move any unused blocks back to the free pool.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (mp->m_resblks > request) {
|
||
|
|
lcounter = mp->m_resblks_avail - request;
|
||
|
|
if (lcounter > 0) { /* release unused blocks */
|
||
|
|
mp->m_sb.sb_fdblocks += lcounter;
|
||
|
|
mp->m_resblks_avail -= lcounter;
|
||
|
|
}
|
||
|
|
mp->m_resblks = request;
|
||
|
|
} else {
|
||
|
|
delta = request - mp->m_resblks;
|
||
|
|
lcounter = mp->m_sb.sb_fdblocks - delta;
|
||
|
|
if (lcounter < 0) {
|
||
|
|
/* We can't satisfy the request, just get what we can */
|
||
|
|
mp->m_resblks += mp->m_sb.sb_fdblocks;
|
||
|
|
mp->m_resblks_avail += mp->m_sb.sb_fdblocks;
|
||
|
|
mp->m_sb.sb_fdblocks = 0;
|
||
|
|
} else {
|
||
|
|
mp->m_sb.sb_fdblocks = lcounter;
|
||
|
|
mp->m_resblks = request;
|
||
|
|
mp->m_resblks_avail += delta;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
outval->resblks = mp->m_resblks;
|
||
|
|
outval->resblks_avail = mp->m_resblks_avail;
|
||
|
|
XFS_SB_UNLOCK(mp, s);
|
||
|
|
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);
|
||
|
|
atomic_inc(&mp->m_active_trans);
|
||
|
|
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, NULL);
|
||
|
|
|
||
|
|
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 vfs *vfsp = XFS_MTOVFS(mp);
|
||
|
|
struct super_block *sb = freeze_bdev(vfsp->vfs_super->s_bdev);
|
||
|
|
|
||
|
|
if (sb) {
|
||
|
|
xfs_force_shutdown(mp, XFS_FORCE_UMOUNT);
|
||
|
|
thaw_bdev(sb->s_bdev, sb);
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
|
||
|
|
xfs_force_shutdown(mp, XFS_FORCE_UMOUNT);
|
||
|
|
break;
|
||
|
|
case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
|
||
|
|
xfs_force_shutdown(mp, XFS_FORCE_UMOUNT|XFS_LOG_IO_ERROR);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return XFS_ERROR(EINVAL);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|