![Eric Sandeen](/assets/img/avatar_default.png)
Spotted by Roger Willcocks <willcor @at@ gmail.com> SGI-PV: 944858 SGI-Modid: xfs-linux:xfs-kern:201213a Signed-off-by: Eric Sandeen <sandeen@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
1581 lines
41 KiB
C
1581 lines
41 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_log.h"
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#include "xfs_inum.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_dir.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_dir_sf.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_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_alloc.h"
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#include "xfs_rtalloc.h"
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#include "xfs_bmap.h"
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#include "xfs_error.h"
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#include "xfs_rw.h"
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#include "xfs_quota.h"
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#include "xfs_fsops.h"
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STATIC void xfs_mount_log_sbunit(xfs_mount_t *, __int64_t);
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STATIC int xfs_uuid_mount(xfs_mount_t *);
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STATIC void xfs_uuid_unmount(xfs_mount_t *mp);
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STATIC void xfs_unmountfs_wait(xfs_mount_t *);
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static struct {
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short offset;
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short type; /* 0 = integer
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* 1 = binary / string (no translation)
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*/
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} xfs_sb_info[] = {
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{ offsetof(xfs_sb_t, sb_magicnum), 0 },
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{ offsetof(xfs_sb_t, sb_blocksize), 0 },
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{ offsetof(xfs_sb_t, sb_dblocks), 0 },
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{ offsetof(xfs_sb_t, sb_rblocks), 0 },
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{ offsetof(xfs_sb_t, sb_rextents), 0 },
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{ offsetof(xfs_sb_t, sb_uuid), 1 },
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{ offsetof(xfs_sb_t, sb_logstart), 0 },
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{ offsetof(xfs_sb_t, sb_rootino), 0 },
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{ offsetof(xfs_sb_t, sb_rbmino), 0 },
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{ offsetof(xfs_sb_t, sb_rsumino), 0 },
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{ offsetof(xfs_sb_t, sb_rextsize), 0 },
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{ offsetof(xfs_sb_t, sb_agblocks), 0 },
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{ offsetof(xfs_sb_t, sb_agcount), 0 },
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{ offsetof(xfs_sb_t, sb_rbmblocks), 0 },
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{ offsetof(xfs_sb_t, sb_logblocks), 0 },
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{ offsetof(xfs_sb_t, sb_versionnum), 0 },
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{ offsetof(xfs_sb_t, sb_sectsize), 0 },
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{ offsetof(xfs_sb_t, sb_inodesize), 0 },
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{ offsetof(xfs_sb_t, sb_inopblock), 0 },
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{ offsetof(xfs_sb_t, sb_fname[0]), 1 },
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{ offsetof(xfs_sb_t, sb_blocklog), 0 },
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{ offsetof(xfs_sb_t, sb_sectlog), 0 },
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{ offsetof(xfs_sb_t, sb_inodelog), 0 },
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{ offsetof(xfs_sb_t, sb_inopblog), 0 },
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{ offsetof(xfs_sb_t, sb_agblklog), 0 },
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{ offsetof(xfs_sb_t, sb_rextslog), 0 },
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{ offsetof(xfs_sb_t, sb_inprogress), 0 },
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{ offsetof(xfs_sb_t, sb_imax_pct), 0 },
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{ offsetof(xfs_sb_t, sb_icount), 0 },
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{ offsetof(xfs_sb_t, sb_ifree), 0 },
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{ offsetof(xfs_sb_t, sb_fdblocks), 0 },
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{ offsetof(xfs_sb_t, sb_frextents), 0 },
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{ offsetof(xfs_sb_t, sb_uquotino), 0 },
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{ offsetof(xfs_sb_t, sb_gquotino), 0 },
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{ offsetof(xfs_sb_t, sb_qflags), 0 },
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{ offsetof(xfs_sb_t, sb_flags), 0 },
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{ offsetof(xfs_sb_t, sb_shared_vn), 0 },
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{ offsetof(xfs_sb_t, sb_inoalignmt), 0 },
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{ offsetof(xfs_sb_t, sb_unit), 0 },
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{ offsetof(xfs_sb_t, sb_width), 0 },
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{ offsetof(xfs_sb_t, sb_dirblklog), 0 },
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{ offsetof(xfs_sb_t, sb_logsectlog), 0 },
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{ offsetof(xfs_sb_t, sb_logsectsize),0 },
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{ offsetof(xfs_sb_t, sb_logsunit), 0 },
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{ offsetof(xfs_sb_t, sb_features2), 0 },
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{ sizeof(xfs_sb_t), 0 }
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};
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/*
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* Return a pointer to an initialized xfs_mount structure.
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*/
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xfs_mount_t *
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xfs_mount_init(void)
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{
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xfs_mount_t *mp;
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mp = kmem_zalloc(sizeof(*mp), KM_SLEEP);
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AIL_LOCKINIT(&mp->m_ail_lock, "xfs_ail");
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spinlock_init(&mp->m_sb_lock, "xfs_sb");
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mutex_init(&mp->m_ilock, MUTEX_DEFAULT, "xfs_ilock");
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initnsema(&mp->m_growlock, 1, "xfs_grow");
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/*
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* Initialize the AIL.
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*/
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xfs_trans_ail_init(mp);
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atomic_set(&mp->m_active_trans, 0);
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return mp;
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}
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/*
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* Free up the resources associated with a mount structure. Assume that
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* the structure was initially zeroed, so we can tell which fields got
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* initialized.
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*/
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void
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xfs_mount_free(
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xfs_mount_t *mp,
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int remove_bhv)
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{
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if (mp->m_ihash)
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xfs_ihash_free(mp);
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if (mp->m_chash)
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xfs_chash_free(mp);
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if (mp->m_perag) {
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int agno;
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for (agno = 0; agno < mp->m_maxagi; agno++)
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if (mp->m_perag[agno].pagb_list)
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kmem_free(mp->m_perag[agno].pagb_list,
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sizeof(xfs_perag_busy_t) *
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XFS_PAGB_NUM_SLOTS);
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kmem_free(mp->m_perag,
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sizeof(xfs_perag_t) * mp->m_sb.sb_agcount);
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}
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AIL_LOCK_DESTROY(&mp->m_ail_lock);
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spinlock_destroy(&mp->m_sb_lock);
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mutex_destroy(&mp->m_ilock);
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freesema(&mp->m_growlock);
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if (mp->m_quotainfo)
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XFS_QM_DONE(mp);
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if (mp->m_fsname != NULL)
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kmem_free(mp->m_fsname, mp->m_fsname_len);
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if (mp->m_rtname != NULL)
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kmem_free(mp->m_rtname, strlen(mp->m_rtname) + 1);
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if (mp->m_logname != NULL)
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kmem_free(mp->m_logname, strlen(mp->m_logname) + 1);
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if (remove_bhv) {
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struct vfs *vfsp = XFS_MTOVFS(mp);
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bhv_remove_all_vfsops(vfsp, 0);
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VFS_REMOVEBHV(vfsp, &mp->m_bhv);
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}
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kmem_free(mp, sizeof(xfs_mount_t));
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}
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/*
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* Check the validity of the SB found.
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*/
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STATIC int
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xfs_mount_validate_sb(
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xfs_mount_t *mp,
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xfs_sb_t *sbp)
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{
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/*
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* If the log device and data device have the
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* same device number, the log is internal.
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* Consequently, the sb_logstart should be non-zero. If
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* we have a zero sb_logstart in this case, we may be trying to mount
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* a volume filesystem in a non-volume manner.
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*/
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if (sbp->sb_magicnum != XFS_SB_MAGIC) {
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cmn_err(CE_WARN, "XFS: bad magic number");
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return XFS_ERROR(EWRONGFS);
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}
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if (!XFS_SB_GOOD_VERSION(sbp)) {
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cmn_err(CE_WARN, "XFS: bad version");
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return XFS_ERROR(EWRONGFS);
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}
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if (unlikely(
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sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
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cmn_err(CE_WARN,
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"XFS: filesystem is marked as having an external log; "
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"specify logdev on the\nmount command line.");
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XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(1)",
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XFS_ERRLEVEL_HIGH, mp, sbp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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if (unlikely(
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sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
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cmn_err(CE_WARN,
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"XFS: filesystem is marked as having an internal log; "
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"don't specify logdev on\nthe mount command line.");
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XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(2)",
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XFS_ERRLEVEL_HIGH, mp, sbp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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/*
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* More sanity checking. These were stolen directly from
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* xfs_repair.
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*/
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if (unlikely(
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sbp->sb_agcount <= 0 ||
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sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
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sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
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sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
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sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
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sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
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sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
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sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
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sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
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sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
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sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
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(sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
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(sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
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sbp->sb_imax_pct > 100)) {
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cmn_err(CE_WARN, "XFS: SB sanity check 1 failed");
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XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(3)",
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XFS_ERRLEVEL_LOW, mp, sbp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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/*
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* Sanity check AG count, size fields against data size field
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*/
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if (unlikely(
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sbp->sb_dblocks == 0 ||
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sbp->sb_dblocks >
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(xfs_drfsbno_t)sbp->sb_agcount * sbp->sb_agblocks ||
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sbp->sb_dblocks < (xfs_drfsbno_t)(sbp->sb_agcount - 1) *
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sbp->sb_agblocks + XFS_MIN_AG_BLOCKS)) {
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cmn_err(CE_WARN, "XFS: SB sanity check 2 failed");
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XFS_ERROR_REPORT("xfs_mount_validate_sb(4)",
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XFS_ERRLEVEL_LOW, mp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
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ASSERT(sbp->sb_blocklog >= BBSHIFT);
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#if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */
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if (unlikely(
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(sbp->sb_dblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX ||
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(sbp->sb_rblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX)) {
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#else /* Limited by UINT_MAX of sectors */
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if (unlikely(
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(sbp->sb_dblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX ||
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(sbp->sb_rblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX)) {
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#endif
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cmn_err(CE_WARN,
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"XFS: File system is too large to be mounted on this system.");
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return XFS_ERROR(E2BIG);
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}
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if (unlikely(sbp->sb_inprogress)) {
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cmn_err(CE_WARN, "XFS: file system busy");
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XFS_ERROR_REPORT("xfs_mount_validate_sb(5)",
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XFS_ERRLEVEL_LOW, mp);
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return XFS_ERROR(EFSCORRUPTED);
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}
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/*
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* Version 1 directory format has never worked on Linux.
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*/
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if (unlikely(!XFS_SB_VERSION_HASDIRV2(sbp))) {
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cmn_err(CE_WARN,
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"XFS: Attempted to mount file system using version 1 directory format");
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return XFS_ERROR(ENOSYS);
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}
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/*
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* Until this is fixed only page-sized or smaller data blocks work.
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*/
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if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
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cmn_err(CE_WARN,
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"XFS: Attempted to mount file system with blocksize %d bytes",
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sbp->sb_blocksize);
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cmn_err(CE_WARN,
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"XFS: Only page-sized (%ld) or less blocksizes currently work.",
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PAGE_SIZE);
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return XFS_ERROR(ENOSYS);
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}
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return 0;
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}
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xfs_agnumber_t
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xfs_initialize_perag(
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struct vfs *vfs,
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xfs_mount_t *mp,
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xfs_agnumber_t agcount)
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{
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xfs_agnumber_t index, max_metadata;
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xfs_perag_t *pag;
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xfs_agino_t agino;
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xfs_ino_t ino;
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xfs_sb_t *sbp = &mp->m_sb;
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xfs_ino_t max_inum = XFS_MAXINUMBER_32;
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/* Check to see if the filesystem can overflow 32 bit inodes */
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agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
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ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
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/* Clear the mount flag if no inode can overflow 32 bits
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* on this filesystem, or if specifically requested..
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*/
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if ((vfs->vfs_flag & VFS_32BITINODES) && ino > max_inum) {
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mp->m_flags |= XFS_MOUNT_32BITINODES;
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} else {
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mp->m_flags &= ~XFS_MOUNT_32BITINODES;
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}
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/* If we can overflow then setup the ag headers accordingly */
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if (mp->m_flags & XFS_MOUNT_32BITINODES) {
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/* Calculate how much should be reserved for inodes to
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* meet the max inode percentage.
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*/
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if (mp->m_maxicount) {
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__uint64_t icount;
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icount = sbp->sb_dblocks * sbp->sb_imax_pct;
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do_div(icount, 100);
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icount += sbp->sb_agblocks - 1;
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do_div(icount, sbp->sb_agblocks);
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max_metadata = icount;
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} else {
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max_metadata = agcount;
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}
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for (index = 0; index < agcount; index++) {
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ino = XFS_AGINO_TO_INO(mp, index, agino);
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if (ino > max_inum) {
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index++;
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break;
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}
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/* This ag is prefered for inodes */
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pag = &mp->m_perag[index];
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pag->pagi_inodeok = 1;
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if (index < max_metadata)
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pag->pagf_metadata = 1;
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}
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} else {
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/* Setup default behavior for smaller filesystems */
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for (index = 0; index < agcount; index++) {
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pag = &mp->m_perag[index];
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pag->pagi_inodeok = 1;
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}
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}
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return index;
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}
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/*
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* xfs_xlatesb
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*
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* data - on disk version of sb
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* sb - a superblock
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* dir - conversion direction: <0 - convert sb to buf
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* >0 - convert buf to sb
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* fields - which fields to copy (bitmask)
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*/
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void
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xfs_xlatesb(
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void *data,
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xfs_sb_t *sb,
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int dir,
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__int64_t fields)
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{
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xfs_caddr_t buf_ptr;
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xfs_caddr_t mem_ptr;
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xfs_sb_field_t f;
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int first;
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int size;
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ASSERT(dir);
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ASSERT(fields);
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if (!fields)
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return;
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buf_ptr = (xfs_caddr_t)data;
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mem_ptr = (xfs_caddr_t)sb;
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while (fields) {
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f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
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first = xfs_sb_info[f].offset;
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size = xfs_sb_info[f + 1].offset - first;
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ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1);
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if (size == 1 || xfs_sb_info[f].type == 1) {
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if (dir > 0) {
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memcpy(mem_ptr + first, buf_ptr + first, size);
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} else {
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memcpy(buf_ptr + first, mem_ptr + first, size);
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}
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} else {
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switch (size) {
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case 2:
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INT_XLATE(*(__uint16_t*)(buf_ptr+first),
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*(__uint16_t*)(mem_ptr+first),
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dir, ARCH_CONVERT);
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break;
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case 4:
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INT_XLATE(*(__uint32_t*)(buf_ptr+first),
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*(__uint32_t*)(mem_ptr+first),
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dir, ARCH_CONVERT);
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break;
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case 8:
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INT_XLATE(*(__uint64_t*)(buf_ptr+first),
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*(__uint64_t*)(mem_ptr+first), dir, ARCH_CONVERT);
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break;
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default:
|
|
ASSERT(0);
|
|
}
|
|
}
|
|
|
|
fields &= ~(1LL << f);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* xfs_readsb
|
|
*
|
|
* Does the initial read of the superblock.
|
|
*/
|
|
int
|
|
xfs_readsb(xfs_mount_t *mp)
|
|
{
|
|
unsigned int sector_size;
|
|
unsigned int extra_flags;
|
|
xfs_buf_t *bp;
|
|
xfs_sb_t *sbp;
|
|
int error;
|
|
|
|
ASSERT(mp->m_sb_bp == NULL);
|
|
ASSERT(mp->m_ddev_targp != NULL);
|
|
|
|
/*
|
|
* Allocate a (locked) buffer to hold the superblock.
|
|
* This will be kept around at all times to optimize
|
|
* access to the superblock.
|
|
*/
|
|
sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
|
|
extra_flags = XFS_BUF_LOCK | XFS_BUF_MANAGE | XFS_BUF_MAPPED;
|
|
|
|
bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR,
|
|
BTOBB(sector_size), extra_flags);
|
|
if (!bp || XFS_BUF_ISERROR(bp)) {
|
|
cmn_err(CE_WARN, "XFS: SB read failed");
|
|
error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM;
|
|
goto fail;
|
|
}
|
|
ASSERT(XFS_BUF_ISBUSY(bp));
|
|
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
|
|
|
|
/*
|
|
* Initialize the mount structure from the superblock.
|
|
* But first do some basic consistency checking.
|
|
*/
|
|
sbp = XFS_BUF_TO_SBP(bp);
|
|
xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), 1, XFS_SB_ALL_BITS);
|
|
|
|
error = xfs_mount_validate_sb(mp, &(mp->m_sb));
|
|
if (error) {
|
|
cmn_err(CE_WARN, "XFS: SB validate failed");
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* We must be able to do sector-sized and sector-aligned IO.
|
|
*/
|
|
if (sector_size > mp->m_sb.sb_sectsize) {
|
|
cmn_err(CE_WARN,
|
|
"XFS: device supports only %u byte sectors (not %u)",
|
|
sector_size, mp->m_sb.sb_sectsize);
|
|
error = ENOSYS;
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* If device sector size is smaller than the superblock size,
|
|
* re-read the superblock so the buffer is correctly sized.
|
|
*/
|
|
if (sector_size < mp->m_sb.sb_sectsize) {
|
|
XFS_BUF_UNMANAGE(bp);
|
|
xfs_buf_relse(bp);
|
|
sector_size = mp->m_sb.sb_sectsize;
|
|
bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR,
|
|
BTOBB(sector_size), extra_flags);
|
|
if (!bp || XFS_BUF_ISERROR(bp)) {
|
|
cmn_err(CE_WARN, "XFS: SB re-read failed");
|
|
error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM;
|
|
goto fail;
|
|
}
|
|
ASSERT(XFS_BUF_ISBUSY(bp));
|
|
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
|
|
}
|
|
|
|
mp->m_sb_bp = bp;
|
|
xfs_buf_relse(bp);
|
|
ASSERT(XFS_BUF_VALUSEMA(bp) > 0);
|
|
return 0;
|
|
|
|
fail:
|
|
if (bp) {
|
|
XFS_BUF_UNMANAGE(bp);
|
|
xfs_buf_relse(bp);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
|
|
/*
|
|
* xfs_mount_common
|
|
*
|
|
* Mount initialization code establishing various mount
|
|
* fields from the superblock associated with the given
|
|
* mount structure
|
|
*/
|
|
STATIC void
|
|
xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp)
|
|
{
|
|
int i;
|
|
|
|
mp->m_agfrotor = mp->m_agirotor = 0;
|
|
spinlock_init(&mp->m_agirotor_lock, "m_agirotor_lock");
|
|
mp->m_maxagi = mp->m_sb.sb_agcount;
|
|
mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
|
|
mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
|
|
mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
|
|
mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
|
|
mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
|
|
mp->m_litino = sbp->sb_inodesize -
|
|
((uint)sizeof(xfs_dinode_core_t) + (uint)sizeof(xfs_agino_t));
|
|
mp->m_blockmask = sbp->sb_blocksize - 1;
|
|
mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
|
|
mp->m_blockwmask = mp->m_blockwsize - 1;
|
|
INIT_LIST_HEAD(&mp->m_del_inodes);
|
|
|
|
/*
|
|
* Setup for attributes, in case they get created.
|
|
* This value is for inodes getting attributes for the first time,
|
|
* the per-inode value is for old attribute values.
|
|
*/
|
|
ASSERT(sbp->sb_inodesize >= 256 && sbp->sb_inodesize <= 2048);
|
|
switch (sbp->sb_inodesize) {
|
|
case 256:
|
|
mp->m_attroffset = XFS_LITINO(mp) -
|
|
XFS_BMDR_SPACE_CALC(MINABTPTRS);
|
|
break;
|
|
case 512:
|
|
case 1024:
|
|
case 2048:
|
|
mp->m_attroffset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
ASSERT(mp->m_attroffset < XFS_LITINO(mp));
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
mp->m_alloc_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize,
|
|
xfs_alloc, i == 0);
|
|
mp->m_alloc_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize,
|
|
xfs_alloc, i == 0);
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
mp->m_bmap_dmxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize,
|
|
xfs_bmbt, i == 0);
|
|
mp->m_bmap_dmnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize,
|
|
xfs_bmbt, i == 0);
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
mp->m_inobt_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize,
|
|
xfs_inobt, i == 0);
|
|
mp->m_inobt_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize,
|
|
xfs_inobt, i == 0);
|
|
}
|
|
|
|
mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
|
|
mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK,
|
|
sbp->sb_inopblock);
|
|
mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
|
|
}
|
|
/*
|
|
* xfs_mountfs
|
|
*
|
|
* This function does the following on an initial mount of a file system:
|
|
* - reads the superblock from disk and init the mount struct
|
|
* - if we're a 32-bit kernel, do a size check on the superblock
|
|
* so we don't mount terabyte filesystems
|
|
* - init mount struct realtime fields
|
|
* - allocate inode hash table for fs
|
|
* - init directory manager
|
|
* - perform recovery and init the log manager
|
|
*/
|
|
int
|
|
xfs_mountfs(
|
|
vfs_t *vfsp,
|
|
xfs_mount_t *mp,
|
|
int mfsi_flags)
|
|
{
|
|
xfs_buf_t *bp;
|
|
xfs_sb_t *sbp = &(mp->m_sb);
|
|
xfs_inode_t *rip;
|
|
vnode_t *rvp = NULL;
|
|
int readio_log, writeio_log;
|
|
xfs_daddr_t d;
|
|
__uint64_t ret64;
|
|
__int64_t update_flags;
|
|
uint quotamount, quotaflags;
|
|
int agno;
|
|
int uuid_mounted = 0;
|
|
int error = 0;
|
|
|
|
if (mp->m_sb_bp == NULL) {
|
|
if ((error = xfs_readsb(mp))) {
|
|
return (error);
|
|
}
|
|
}
|
|
xfs_mount_common(mp, sbp);
|
|
|
|
/*
|
|
* Check if sb_agblocks is aligned at stripe boundary
|
|
* If sb_agblocks is NOT aligned turn off m_dalign since
|
|
* allocator alignment is within an ag, therefore ag has
|
|
* to be aligned at stripe boundary.
|
|
*/
|
|
update_flags = 0LL;
|
|
if (mp->m_dalign && !(mfsi_flags & XFS_MFSI_SECOND)) {
|
|
/*
|
|
* If stripe unit and stripe width are not multiples
|
|
* of the fs blocksize turn off alignment.
|
|
*/
|
|
if ((BBTOB(mp->m_dalign) & mp->m_blockmask) ||
|
|
(BBTOB(mp->m_swidth) & mp->m_blockmask)) {
|
|
if (mp->m_flags & XFS_MOUNT_RETERR) {
|
|
cmn_err(CE_WARN,
|
|
"XFS: alignment check 1 failed");
|
|
error = XFS_ERROR(EINVAL);
|
|
goto error1;
|
|
}
|
|
mp->m_dalign = mp->m_swidth = 0;
|
|
} else {
|
|
/*
|
|
* Convert the stripe unit and width to FSBs.
|
|
*/
|
|
mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign);
|
|
if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) {
|
|
if (mp->m_flags & XFS_MOUNT_RETERR) {
|
|
error = XFS_ERROR(EINVAL);
|
|
goto error1;
|
|
}
|
|
xfs_fs_cmn_err(CE_WARN, mp,
|
|
"stripe alignment turned off: sunit(%d)/swidth(%d) incompatible with agsize(%d)",
|
|
mp->m_dalign, mp->m_swidth,
|
|
sbp->sb_agblocks);
|
|
|
|
mp->m_dalign = 0;
|
|
mp->m_swidth = 0;
|
|
} else if (mp->m_dalign) {
|
|
mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth);
|
|
} else {
|
|
if (mp->m_flags & XFS_MOUNT_RETERR) {
|
|
xfs_fs_cmn_err(CE_WARN, mp,
|
|
"stripe alignment turned off: sunit(%d) less than bsize(%d)",
|
|
mp->m_dalign,
|
|
mp->m_blockmask +1);
|
|
error = XFS_ERROR(EINVAL);
|
|
goto error1;
|
|
}
|
|
mp->m_swidth = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Update superblock with new values
|
|
* and log changes
|
|
*/
|
|
if (XFS_SB_VERSION_HASDALIGN(sbp)) {
|
|
if (sbp->sb_unit != mp->m_dalign) {
|
|
sbp->sb_unit = mp->m_dalign;
|
|
update_flags |= XFS_SB_UNIT;
|
|
}
|
|
if (sbp->sb_width != mp->m_swidth) {
|
|
sbp->sb_width = mp->m_swidth;
|
|
update_flags |= XFS_SB_WIDTH;
|
|
}
|
|
}
|
|
} else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
|
|
XFS_SB_VERSION_HASDALIGN(&mp->m_sb)) {
|
|
mp->m_dalign = sbp->sb_unit;
|
|
mp->m_swidth = sbp->sb_width;
|
|
}
|
|
|
|
xfs_alloc_compute_maxlevels(mp);
|
|
xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
|
|
xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
|
|
xfs_ialloc_compute_maxlevels(mp);
|
|
|
|
if (sbp->sb_imax_pct) {
|
|
__uint64_t icount;
|
|
|
|
/* Make sure the maximum inode count is a multiple of the
|
|
* units we allocate inodes in.
|
|
*/
|
|
|
|
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
|
|
do_div(icount, 100);
|
|
do_div(icount, mp->m_ialloc_blks);
|
|
mp->m_maxicount = (icount * mp->m_ialloc_blks) <<
|
|
sbp->sb_inopblog;
|
|
} else
|
|
mp->m_maxicount = 0;
|
|
|
|
mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog);
|
|
|
|
/*
|
|
* XFS uses the uuid from the superblock as the unique
|
|
* identifier for fsid. We can not use the uuid from the volume
|
|
* since a single partition filesystem is identical to a single
|
|
* partition volume/filesystem.
|
|
*/
|
|
if ((mfsi_flags & XFS_MFSI_SECOND) == 0 &&
|
|
(mp->m_flags & XFS_MOUNT_NOUUID) == 0) {
|
|
if (xfs_uuid_mount(mp)) {
|
|
error = XFS_ERROR(EINVAL);
|
|
goto error1;
|
|
}
|
|
uuid_mounted=1;
|
|
ret64 = uuid_hash64(&sbp->sb_uuid);
|
|
memcpy(&vfsp->vfs_fsid, &ret64, sizeof(ret64));
|
|
}
|
|
|
|
/*
|
|
* Set the default minimum read and write sizes unless
|
|
* already specified in a mount option.
|
|
* We use smaller I/O sizes when the file system
|
|
* is being used for NFS service (wsync mount option).
|
|
*/
|
|
if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) {
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC) {
|
|
readio_log = XFS_WSYNC_READIO_LOG;
|
|
writeio_log = XFS_WSYNC_WRITEIO_LOG;
|
|
} else {
|
|
readio_log = XFS_READIO_LOG_LARGE;
|
|
writeio_log = XFS_WRITEIO_LOG_LARGE;
|
|
}
|
|
} else {
|
|
readio_log = mp->m_readio_log;
|
|
writeio_log = mp->m_writeio_log;
|
|
}
|
|
|
|
/*
|
|
* Set the number of readahead buffers to use based on
|
|
* physical memory size.
|
|
*/
|
|
if (xfs_physmem <= 4096) /* <= 16MB */
|
|
mp->m_nreadaheads = XFS_RW_NREADAHEAD_16MB;
|
|
else if (xfs_physmem <= 8192) /* <= 32MB */
|
|
mp->m_nreadaheads = XFS_RW_NREADAHEAD_32MB;
|
|
else
|
|
mp->m_nreadaheads = XFS_RW_NREADAHEAD_K32;
|
|
if (sbp->sb_blocklog > readio_log) {
|
|
mp->m_readio_log = sbp->sb_blocklog;
|
|
} else {
|
|
mp->m_readio_log = readio_log;
|
|
}
|
|
mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog);
|
|
if (sbp->sb_blocklog > writeio_log) {
|
|
mp->m_writeio_log = sbp->sb_blocklog;
|
|
} else {
|
|
mp->m_writeio_log = writeio_log;
|
|
}
|
|
mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog);
|
|
|
|
/*
|
|
* Set the inode cluster size based on the physical memory
|
|
* size. This may still be overridden by the file system
|
|
* block size if it is larger than the chosen cluster size.
|
|
*/
|
|
if (xfs_physmem <= btoc(32 * 1024 * 1024)) { /* <= 32 MB */
|
|
mp->m_inode_cluster_size = XFS_INODE_SMALL_CLUSTER_SIZE;
|
|
} else {
|
|
mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
|
|
}
|
|
/*
|
|
* Set whether we're using inode alignment.
|
|
*/
|
|
if (XFS_SB_VERSION_HASALIGN(&mp->m_sb) &&
|
|
mp->m_sb.sb_inoalignmt >=
|
|
XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size))
|
|
mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
|
|
else
|
|
mp->m_inoalign_mask = 0;
|
|
/*
|
|
* If we are using stripe alignment, check whether
|
|
* the stripe unit is a multiple of the inode alignment
|
|
*/
|
|
if (mp->m_dalign && mp->m_inoalign_mask &&
|
|
!(mp->m_dalign & mp->m_inoalign_mask))
|
|
mp->m_sinoalign = mp->m_dalign;
|
|
else
|
|
mp->m_sinoalign = 0;
|
|
/*
|
|
* Check that the data (and log if separate) are an ok size.
|
|
*/
|
|
d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks);
|
|
if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) {
|
|
cmn_err(CE_WARN, "XFS: size check 1 failed");
|
|
error = XFS_ERROR(E2BIG);
|
|
goto error1;
|
|
}
|
|
error = xfs_read_buf(mp, mp->m_ddev_targp,
|
|
d - XFS_FSS_TO_BB(mp, 1),
|
|
XFS_FSS_TO_BB(mp, 1), 0, &bp);
|
|
if (!error) {
|
|
xfs_buf_relse(bp);
|
|
} else {
|
|
cmn_err(CE_WARN, "XFS: size check 2 failed");
|
|
if (error == ENOSPC) {
|
|
error = XFS_ERROR(E2BIG);
|
|
}
|
|
goto error1;
|
|
}
|
|
|
|
if (((mfsi_flags & XFS_MFSI_CLIENT) == 0) &&
|
|
mp->m_logdev_targp != mp->m_ddev_targp) {
|
|
d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
|
|
if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) {
|
|
cmn_err(CE_WARN, "XFS: size check 3 failed");
|
|
error = XFS_ERROR(E2BIG);
|
|
goto error1;
|
|
}
|
|
error = xfs_read_buf(mp, mp->m_logdev_targp,
|
|
d - XFS_FSB_TO_BB(mp, 1),
|
|
XFS_FSB_TO_BB(mp, 1), 0, &bp);
|
|
if (!error) {
|
|
xfs_buf_relse(bp);
|
|
} else {
|
|
cmn_err(CE_WARN, "XFS: size check 3 failed");
|
|
if (error == ENOSPC) {
|
|
error = XFS_ERROR(E2BIG);
|
|
}
|
|
goto error1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize realtime fields in the mount structure
|
|
*/
|
|
if ((error = xfs_rtmount_init(mp))) {
|
|
cmn_err(CE_WARN, "XFS: RT mount failed");
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* For client case we are done now
|
|
*/
|
|
if (mfsi_flags & XFS_MFSI_CLIENT) {
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Copies the low order bits of the timestamp and the randomly
|
|
* set "sequence" number out of a UUID.
|
|
*/
|
|
uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid);
|
|
|
|
/*
|
|
* The vfs structure needs to have a file system independent
|
|
* way of checking for the invariant file system ID. Since it
|
|
* can't look at mount structures it has a pointer to the data
|
|
* in the mount structure.
|
|
*
|
|
* File systems that don't support user level file handles (i.e.
|
|
* all of them except for XFS) will leave vfs_altfsid as NULL.
|
|
*/
|
|
vfsp->vfs_altfsid = (xfs_fsid_t *)mp->m_fixedfsid;
|
|
mp->m_dmevmask = 0; /* not persistent; set after each mount */
|
|
|
|
/*
|
|
* Select the right directory manager.
|
|
*/
|
|
mp->m_dirops =
|
|
XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ?
|
|
xfsv2_dirops :
|
|
xfsv1_dirops;
|
|
|
|
/*
|
|
* Initialize directory manager's entries.
|
|
*/
|
|
XFS_DIR_MOUNT(mp);
|
|
|
|
/*
|
|
* Initialize the attribute manager's entries.
|
|
*/
|
|
mp->m_attr_magicpct = (mp->m_sb.sb_blocksize * 37) / 100;
|
|
|
|
/*
|
|
* Initialize the precomputed transaction reservations values.
|
|
*/
|
|
xfs_trans_init(mp);
|
|
|
|
/*
|
|
* Allocate and initialize the inode hash table for this
|
|
* file system.
|
|
*/
|
|
xfs_ihash_init(mp);
|
|
xfs_chash_init(mp);
|
|
|
|
/*
|
|
* Allocate and initialize the per-ag data.
|
|
*/
|
|
init_rwsem(&mp->m_peraglock);
|
|
mp->m_perag =
|
|
kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t), KM_SLEEP);
|
|
|
|
mp->m_maxagi = xfs_initialize_perag(vfsp, mp, sbp->sb_agcount);
|
|
|
|
/*
|
|
* log's mount-time initialization. Perform 1st part recovery if needed
|
|
*/
|
|
if (likely(sbp->sb_logblocks > 0)) { /* check for volume case */
|
|
error = xfs_log_mount(mp, mp->m_logdev_targp,
|
|
XFS_FSB_TO_DADDR(mp, sbp->sb_logstart),
|
|
XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
|
|
if (error) {
|
|
cmn_err(CE_WARN, "XFS: log mount failed");
|
|
goto error2;
|
|
}
|
|
} else { /* No log has been defined */
|
|
cmn_err(CE_WARN, "XFS: no log defined");
|
|
XFS_ERROR_REPORT("xfs_mountfs_int(1)", XFS_ERRLEVEL_LOW, mp);
|
|
error = XFS_ERROR(EFSCORRUPTED);
|
|
goto error2;
|
|
}
|
|
|
|
/*
|
|
* Get and sanity-check the root inode.
|
|
* Save the pointer to it in the mount structure.
|
|
*/
|
|
error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip, 0);
|
|
if (error) {
|
|
cmn_err(CE_WARN, "XFS: failed to read root inode");
|
|
goto error3;
|
|
}
|
|
|
|
ASSERT(rip != NULL);
|
|
rvp = XFS_ITOV(rip);
|
|
|
|
if (unlikely((rip->i_d.di_mode & S_IFMT) != S_IFDIR)) {
|
|
cmn_err(CE_WARN, "XFS: corrupted root inode");
|
|
prdev("Root inode %llu is not a directory",
|
|
mp->m_ddev_targp, (unsigned long long)rip->i_ino);
|
|
xfs_iunlock(rip, XFS_ILOCK_EXCL);
|
|
XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW,
|
|
mp);
|
|
error = XFS_ERROR(EFSCORRUPTED);
|
|
goto error4;
|
|
}
|
|
mp->m_rootip = rip; /* save it */
|
|
|
|
xfs_iunlock(rip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Initialize realtime inode pointers in the mount structure
|
|
*/
|
|
if ((error = xfs_rtmount_inodes(mp))) {
|
|
/*
|
|
* Free up the root inode.
|
|
*/
|
|
cmn_err(CE_WARN, "XFS: failed to read RT inodes");
|
|
goto error4;
|
|
}
|
|
|
|
/*
|
|
* If fs is not mounted readonly, then update the superblock
|
|
* unit and width changes.
|
|
*/
|
|
if (update_flags && !(vfsp->vfs_flag & VFS_RDONLY))
|
|
xfs_mount_log_sbunit(mp, update_flags);
|
|
|
|
/*
|
|
* Initialise the XFS quota management subsystem for this mount
|
|
*/
|
|
if ((error = XFS_QM_INIT(mp, "amount, "aflags)))
|
|
goto error4;
|
|
|
|
/*
|
|
* Finish recovering the file system. This part needed to be
|
|
* delayed until after the root and real-time bitmap inodes
|
|
* were consistently read in.
|
|
*/
|
|
error = xfs_log_mount_finish(mp, mfsi_flags);
|
|
if (error) {
|
|
cmn_err(CE_WARN, "XFS: log mount finish failed");
|
|
goto error4;
|
|
}
|
|
|
|
/*
|
|
* Complete the quota initialisation, post-log-replay component.
|
|
*/
|
|
if ((error = XFS_QM_MOUNT(mp, quotamount, quotaflags, mfsi_flags)))
|
|
goto error4;
|
|
|
|
return 0;
|
|
|
|
error4:
|
|
/*
|
|
* Free up the root inode.
|
|
*/
|
|
VN_RELE(rvp);
|
|
error3:
|
|
xfs_log_unmount_dealloc(mp);
|
|
error2:
|
|
xfs_ihash_free(mp);
|
|
xfs_chash_free(mp);
|
|
for (agno = 0; agno < sbp->sb_agcount; agno++)
|
|
if (mp->m_perag[agno].pagb_list)
|
|
kmem_free(mp->m_perag[agno].pagb_list,
|
|
sizeof(xfs_perag_busy_t) * XFS_PAGB_NUM_SLOTS);
|
|
kmem_free(mp->m_perag, sbp->sb_agcount * sizeof(xfs_perag_t));
|
|
mp->m_perag = NULL;
|
|
/* FALLTHROUGH */
|
|
error1:
|
|
if (uuid_mounted)
|
|
xfs_uuid_unmount(mp);
|
|
xfs_freesb(mp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* xfs_unmountfs
|
|
*
|
|
* This flushes out the inodes,dquots and the superblock, unmounts the
|
|
* log and makes sure that incore structures are freed.
|
|
*/
|
|
int
|
|
xfs_unmountfs(xfs_mount_t *mp, struct cred *cr)
|
|
{
|
|
struct vfs *vfsp = XFS_MTOVFS(mp);
|
|
#if defined(DEBUG) || defined(INDUCE_IO_ERROR)
|
|
int64_t fsid;
|
|
#endif
|
|
|
|
xfs_iflush_all(mp);
|
|
|
|
XFS_QM_DQPURGEALL(mp,
|
|
XFS_QMOPT_UQUOTA | XFS_QMOPT_GQUOTA | XFS_QMOPT_UMOUNTING);
|
|
|
|
/*
|
|
* Flush out the log synchronously so that we know for sure
|
|
* that nothing is pinned. This is important because bflush()
|
|
* will skip pinned buffers.
|
|
*/
|
|
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
|
|
|
|
xfs_binval(mp->m_ddev_targp);
|
|
if (mp->m_rtdev_targp) {
|
|
xfs_binval(mp->m_rtdev_targp);
|
|
}
|
|
|
|
xfs_unmountfs_writesb(mp);
|
|
|
|
xfs_unmountfs_wait(mp); /* wait for async bufs */
|
|
|
|
xfs_log_unmount(mp); /* Done! No more fs ops. */
|
|
|
|
xfs_freesb(mp);
|
|
|
|
/*
|
|
* All inodes from this mount point should be freed.
|
|
*/
|
|
ASSERT(mp->m_inodes == NULL);
|
|
|
|
xfs_unmountfs_close(mp, cr);
|
|
if ((mp->m_flags & XFS_MOUNT_NOUUID) == 0)
|
|
xfs_uuid_unmount(mp);
|
|
|
|
#if defined(DEBUG) || defined(INDUCE_IO_ERROR)
|
|
/*
|
|
* clear all error tags on this filesystem
|
|
*/
|
|
memcpy(&fsid, &vfsp->vfs_fsid, sizeof(int64_t));
|
|
xfs_errortag_clearall_umount(fsid, mp->m_fsname, 0);
|
|
#endif
|
|
XFS_IODONE(vfsp);
|
|
xfs_mount_free(mp, 1);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
xfs_unmountfs_close(xfs_mount_t *mp, struct cred *cr)
|
|
{
|
|
if (mp->m_logdev_targp != mp->m_ddev_targp)
|
|
xfs_free_buftarg(mp->m_logdev_targp, 1);
|
|
if (mp->m_rtdev_targp)
|
|
xfs_free_buftarg(mp->m_rtdev_targp, 1);
|
|
xfs_free_buftarg(mp->m_ddev_targp, 0);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_unmountfs_wait(xfs_mount_t *mp)
|
|
{
|
|
if (mp->m_logdev_targp != mp->m_ddev_targp)
|
|
xfs_wait_buftarg(mp->m_logdev_targp);
|
|
if (mp->m_rtdev_targp)
|
|
xfs_wait_buftarg(mp->m_rtdev_targp);
|
|
xfs_wait_buftarg(mp->m_ddev_targp);
|
|
}
|
|
|
|
int
|
|
xfs_unmountfs_writesb(xfs_mount_t *mp)
|
|
{
|
|
xfs_buf_t *sbp;
|
|
xfs_sb_t *sb;
|
|
int error = 0;
|
|
|
|
/*
|
|
* skip superblock write if fs is read-only, or
|
|
* if we are doing a forced umount.
|
|
*/
|
|
sbp = xfs_getsb(mp, 0);
|
|
if (!(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY ||
|
|
XFS_FORCED_SHUTDOWN(mp))) {
|
|
/*
|
|
* mark shared-readonly if desired
|
|
*/
|
|
sb = XFS_BUF_TO_SBP(sbp);
|
|
if (mp->m_mk_sharedro) {
|
|
if (!(sb->sb_flags & XFS_SBF_READONLY))
|
|
sb->sb_flags |= XFS_SBF_READONLY;
|
|
if (!XFS_SB_VERSION_HASSHARED(sb))
|
|
XFS_SB_VERSION_ADDSHARED(sb);
|
|
xfs_fs_cmn_err(CE_NOTE, mp,
|
|
"Unmounting, marking shared read-only");
|
|
}
|
|
XFS_BUF_UNDONE(sbp);
|
|
XFS_BUF_UNREAD(sbp);
|
|
XFS_BUF_UNDELAYWRITE(sbp);
|
|
XFS_BUF_WRITE(sbp);
|
|
XFS_BUF_UNASYNC(sbp);
|
|
ASSERT(XFS_BUF_TARGET(sbp) == mp->m_ddev_targp);
|
|
xfsbdstrat(mp, sbp);
|
|
/* Nevermind errors we might get here. */
|
|
error = xfs_iowait(sbp);
|
|
if (error)
|
|
xfs_ioerror_alert("xfs_unmountfs_writesb",
|
|
mp, sbp, XFS_BUF_ADDR(sbp));
|
|
if (error && mp->m_mk_sharedro)
|
|
xfs_fs_cmn_err(CE_ALERT, mp, "Superblock write error detected while unmounting. Filesystem may not be marked shared readonly");
|
|
}
|
|
xfs_buf_relse(sbp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* xfs_mod_sb() can be used to copy arbitrary changes to the
|
|
* in-core superblock into the superblock buffer to be logged.
|
|
* It does not provide the higher level of locking that is
|
|
* needed to protect the in-core superblock from concurrent
|
|
* access.
|
|
*/
|
|
void
|
|
xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
|
|
{
|
|
xfs_buf_t *bp;
|
|
int first;
|
|
int last;
|
|
xfs_mount_t *mp;
|
|
xfs_sb_t *sbp;
|
|
xfs_sb_field_t f;
|
|
|
|
ASSERT(fields);
|
|
if (!fields)
|
|
return;
|
|
mp = tp->t_mountp;
|
|
bp = xfs_trans_getsb(tp, mp, 0);
|
|
sbp = XFS_BUF_TO_SBP(bp);
|
|
first = sizeof(xfs_sb_t);
|
|
last = 0;
|
|
|
|
/* translate/copy */
|
|
|
|
xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), -1, fields);
|
|
|
|
/* find modified range */
|
|
|
|
f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
|
|
ASSERT((1LL << f) & XFS_SB_MOD_BITS);
|
|
first = xfs_sb_info[f].offset;
|
|
|
|
f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields);
|
|
ASSERT((1LL << f) & XFS_SB_MOD_BITS);
|
|
last = xfs_sb_info[f + 1].offset - 1;
|
|
|
|
xfs_trans_log_buf(tp, bp, first, last);
|
|
}
|
|
|
|
/*
|
|
* xfs_mod_incore_sb_unlocked() is a utility routine common used to apply
|
|
* a delta to a specified field in the in-core superblock. Simply
|
|
* switch on the field indicated and apply the delta to that field.
|
|
* Fields are not allowed to dip below zero, so if the delta would
|
|
* do this do not apply it and return EINVAL.
|
|
*
|
|
* The SB_LOCK must be held when this routine is called.
|
|
*/
|
|
STATIC int
|
|
xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
|
|
int delta, int rsvd)
|
|
{
|
|
int scounter; /* short counter for 32 bit fields */
|
|
long long lcounter; /* long counter for 64 bit fields */
|
|
long long res_used, rem;
|
|
|
|
/*
|
|
* With the in-core superblock spin lock held, switch
|
|
* on the indicated field. Apply the delta to the
|
|
* proper field. If the fields value would dip below
|
|
* 0, then do not apply the delta and return EINVAL.
|
|
*/
|
|
switch (field) {
|
|
case XFS_SBS_ICOUNT:
|
|
lcounter = (long long)mp->m_sb.sb_icount;
|
|
lcounter += delta;
|
|
if (lcounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_icount = lcounter;
|
|
return (0);
|
|
case XFS_SBS_IFREE:
|
|
lcounter = (long long)mp->m_sb.sb_ifree;
|
|
lcounter += delta;
|
|
if (lcounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_ifree = lcounter;
|
|
return (0);
|
|
case XFS_SBS_FDBLOCKS:
|
|
|
|
lcounter = (long long)mp->m_sb.sb_fdblocks;
|
|
res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
|
|
|
|
if (delta > 0) { /* Putting blocks back */
|
|
if (res_used > delta) {
|
|
mp->m_resblks_avail += delta;
|
|
} else {
|
|
rem = delta - res_used;
|
|
mp->m_resblks_avail = mp->m_resblks;
|
|
lcounter += rem;
|
|
}
|
|
} else { /* Taking blocks away */
|
|
|
|
lcounter += delta;
|
|
|
|
/*
|
|
* If were out of blocks, use any available reserved blocks if
|
|
* were allowed to.
|
|
*/
|
|
|
|
if (lcounter < 0) {
|
|
if (rsvd) {
|
|
lcounter = (long long)mp->m_resblks_avail + delta;
|
|
if (lcounter < 0) {
|
|
return (XFS_ERROR(ENOSPC));
|
|
}
|
|
mp->m_resblks_avail = lcounter;
|
|
return (0);
|
|
} else { /* not reserved */
|
|
return (XFS_ERROR(ENOSPC));
|
|
}
|
|
}
|
|
}
|
|
|
|
mp->m_sb.sb_fdblocks = lcounter;
|
|
return (0);
|
|
case XFS_SBS_FREXTENTS:
|
|
lcounter = (long long)mp->m_sb.sb_frextents;
|
|
lcounter += delta;
|
|
if (lcounter < 0) {
|
|
return (XFS_ERROR(ENOSPC));
|
|
}
|
|
mp->m_sb.sb_frextents = lcounter;
|
|
return (0);
|
|
case XFS_SBS_DBLOCKS:
|
|
lcounter = (long long)mp->m_sb.sb_dblocks;
|
|
lcounter += delta;
|
|
if (lcounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_dblocks = lcounter;
|
|
return (0);
|
|
case XFS_SBS_AGCOUNT:
|
|
scounter = mp->m_sb.sb_agcount;
|
|
scounter += delta;
|
|
if (scounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_agcount = scounter;
|
|
return (0);
|
|
case XFS_SBS_IMAX_PCT:
|
|
scounter = mp->m_sb.sb_imax_pct;
|
|
scounter += delta;
|
|
if (scounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_imax_pct = scounter;
|
|
return (0);
|
|
case XFS_SBS_REXTSIZE:
|
|
scounter = mp->m_sb.sb_rextsize;
|
|
scounter += delta;
|
|
if (scounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_rextsize = scounter;
|
|
return (0);
|
|
case XFS_SBS_RBMBLOCKS:
|
|
scounter = mp->m_sb.sb_rbmblocks;
|
|
scounter += delta;
|
|
if (scounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_rbmblocks = scounter;
|
|
return (0);
|
|
case XFS_SBS_RBLOCKS:
|
|
lcounter = (long long)mp->m_sb.sb_rblocks;
|
|
lcounter += delta;
|
|
if (lcounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_rblocks = lcounter;
|
|
return (0);
|
|
case XFS_SBS_REXTENTS:
|
|
lcounter = (long long)mp->m_sb.sb_rextents;
|
|
lcounter += delta;
|
|
if (lcounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_rextents = lcounter;
|
|
return (0);
|
|
case XFS_SBS_REXTSLOG:
|
|
scounter = mp->m_sb.sb_rextslog;
|
|
scounter += delta;
|
|
if (scounter < 0) {
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
mp->m_sb.sb_rextslog = scounter;
|
|
return (0);
|
|
default:
|
|
ASSERT(0);
|
|
return (XFS_ERROR(EINVAL));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* xfs_mod_incore_sb() is used to change a field in the in-core
|
|
* superblock structure by the specified delta. This modification
|
|
* is protected by the SB_LOCK. Just use the xfs_mod_incore_sb_unlocked()
|
|
* routine to do the work.
|
|
*/
|
|
int
|
|
xfs_mod_incore_sb(xfs_mount_t *mp, xfs_sb_field_t field, int delta, int rsvd)
|
|
{
|
|
unsigned long s;
|
|
int status;
|
|
|
|
s = XFS_SB_LOCK(mp);
|
|
status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
|
|
XFS_SB_UNLOCK(mp, s);
|
|
return (status);
|
|
}
|
|
|
|
/*
|
|
* xfs_mod_incore_sb_batch() is used to change more than one field
|
|
* in the in-core superblock structure at a time. This modification
|
|
* is protected by a lock internal to this module. The fields and
|
|
* changes to those fields are specified in the array of xfs_mod_sb
|
|
* structures passed in.
|
|
*
|
|
* Either all of the specified deltas will be applied or none of
|
|
* them will. If any modified field dips below 0, then all modifications
|
|
* will be backed out and EINVAL will be returned.
|
|
*/
|
|
int
|
|
xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
|
|
{
|
|
unsigned long s;
|
|
int status=0;
|
|
xfs_mod_sb_t *msbp;
|
|
|
|
/*
|
|
* Loop through the array of mod structures and apply each
|
|
* individually. If any fail, then back out all those
|
|
* which have already been applied. Do all of this within
|
|
* the scope of the SB_LOCK so that all of the changes will
|
|
* be atomic.
|
|
*/
|
|
s = XFS_SB_LOCK(mp);
|
|
msbp = &msb[0];
|
|
for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) {
|
|
/*
|
|
* Apply the delta at index n. If it fails, break
|
|
* from the loop so we'll fall into the undo loop
|
|
* below.
|
|
*/
|
|
status = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field,
|
|
msbp->msb_delta, rsvd);
|
|
if (status != 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we didn't complete the loop above, then back out
|
|
* any changes made to the superblock. If you add code
|
|
* between the loop above and here, make sure that you
|
|
* preserve the value of status. Loop back until
|
|
* we step below the beginning of the array. Make sure
|
|
* we don't touch anything back there.
|
|
*/
|
|
if (status != 0) {
|
|
msbp--;
|
|
while (msbp >= msb) {
|
|
status = xfs_mod_incore_sb_unlocked(mp,
|
|
msbp->msb_field, -(msbp->msb_delta), rsvd);
|
|
ASSERT(status == 0);
|
|
msbp--;
|
|
}
|
|
}
|
|
XFS_SB_UNLOCK(mp, s);
|
|
return (status);
|
|
}
|
|
|
|
/*
|
|
* xfs_getsb() is called to obtain the buffer for the superblock.
|
|
* The buffer is returned locked and read in from disk.
|
|
* The buffer should be released with a call to xfs_brelse().
|
|
*
|
|
* If the flags parameter is BUF_TRYLOCK, then we'll only return
|
|
* the superblock buffer if it can be locked without sleeping.
|
|
* If it can't then we'll return NULL.
|
|
*/
|
|
xfs_buf_t *
|
|
xfs_getsb(
|
|
xfs_mount_t *mp,
|
|
int flags)
|
|
{
|
|
xfs_buf_t *bp;
|
|
|
|
ASSERT(mp->m_sb_bp != NULL);
|
|
bp = mp->m_sb_bp;
|
|
if (flags & XFS_BUF_TRYLOCK) {
|
|
if (!XFS_BUF_CPSEMA(bp)) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
XFS_BUF_PSEMA(bp, PRIBIO);
|
|
}
|
|
XFS_BUF_HOLD(bp);
|
|
ASSERT(XFS_BUF_ISDONE(bp));
|
|
return (bp);
|
|
}
|
|
|
|
/*
|
|
* Used to free the superblock along various error paths.
|
|
*/
|
|
void
|
|
xfs_freesb(
|
|
xfs_mount_t *mp)
|
|
{
|
|
xfs_buf_t *bp;
|
|
|
|
/*
|
|
* Use xfs_getsb() so that the buffer will be locked
|
|
* when we call xfs_buf_relse().
|
|
*/
|
|
bp = xfs_getsb(mp, 0);
|
|
XFS_BUF_UNMANAGE(bp);
|
|
xfs_buf_relse(bp);
|
|
mp->m_sb_bp = NULL;
|
|
}
|
|
|
|
/*
|
|
* See if the UUID is unique among mounted XFS filesystems.
|
|
* Mount fails if UUID is nil or a FS with the same UUID is already mounted.
|
|
*/
|
|
STATIC int
|
|
xfs_uuid_mount(
|
|
xfs_mount_t *mp)
|
|
{
|
|
if (uuid_is_nil(&mp->m_sb.sb_uuid)) {
|
|
cmn_err(CE_WARN,
|
|
"XFS: Filesystem %s has nil UUID - can't mount",
|
|
mp->m_fsname);
|
|
return -1;
|
|
}
|
|
if (!uuid_table_insert(&mp->m_sb.sb_uuid)) {
|
|
cmn_err(CE_WARN,
|
|
"XFS: Filesystem %s has duplicate UUID - can't mount",
|
|
mp->m_fsname);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Remove filesystem from the UUID table.
|
|
*/
|
|
STATIC void
|
|
xfs_uuid_unmount(
|
|
xfs_mount_t *mp)
|
|
{
|
|
uuid_table_remove(&mp->m_sb.sb_uuid);
|
|
}
|
|
|
|
/*
|
|
* Used to log changes to the superblock unit and width fields which could
|
|
* be altered by the mount options. Only the first superblock is updated.
|
|
*/
|
|
STATIC void
|
|
xfs_mount_log_sbunit(
|
|
xfs_mount_t *mp,
|
|
__int64_t fields)
|
|
{
|
|
xfs_trans_t *tp;
|
|
|
|
ASSERT(fields & (XFS_SB_UNIT|XFS_SB_WIDTH|XFS_SB_UUID));
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
|
|
if (xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
|
|
XFS_DEFAULT_LOG_COUNT)) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return;
|
|
}
|
|
xfs_mod_sb(tp, fields);
|
|
xfs_trans_commit(tp, 0, NULL);
|
|
}
|