/* * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "xfs.h" #include "xfs_fs.h" #include "xfs_types.h" #include "xfs_bit.h" #include "xfs_log.h" #include "xfs_inum.h" #include "xfs_trans.h" #include "xfs_sb.h" #include "xfs_ag.h" #include "xfs_dir2.h" #include "xfs_dmapi.h" #include "xfs_mount.h" #include "xfs_da_btree.h" #include "xfs_bmap_btree.h" #include "xfs_ialloc_btree.h" #include "xfs_alloc_btree.h" #include "xfs_dir2_sf.h" #include "xfs_attr_sf.h" #include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_inode_item.h" #include "xfs_btree.h" #include "xfs_alloc.h" #include "xfs_ialloc.h" #include "xfs_quota.h" #include "xfs_error.h" #include "xfs_bmap.h" #include "xfs_rw.h" #include "xfs_buf_item.h" #include "xfs_log_priv.h" #include "xfs_dir2_trace.h" #include "xfs_extfree_item.h" #include "xfs_acl.h" #include "xfs_attr.h" #include "xfs_clnt.h" #include "xfs_mru_cache.h" #include "xfs_filestream.h" #include "xfs_fsops.h" #include "xfs_vnodeops.h" #include "xfs_vfsops.h" #include "xfs_utils.h" #include "xfs_sync.h" STATIC void xfs_quiesce_fs( xfs_mount_t *mp) { int count = 0, pincount; xfs_flush_buftarg(mp->m_ddev_targp, 0); xfs_finish_reclaim_all(mp, 0); /* This loop must run at least twice. * The first instance of the loop will flush * most meta data but that will generate more * meta data (typically directory updates). * Which then must be flushed and logged before * we can write the unmount record. */ do { xfs_syncsub(mp, SYNC_INODE_QUIESCE, NULL); pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1); if (!pincount) { delay(50); count++; } } while (count < 2); } /* * Second stage of a quiesce. The data is already synced, now we have to take * care of the metadata. New transactions are already blocked, so we need to * wait for any remaining transactions to drain out before proceding. */ void xfs_attr_quiesce( xfs_mount_t *mp) { int error = 0; /* wait for all modifications to complete */ while (atomic_read(&mp->m_active_trans) > 0) delay(100); /* flush inodes and push all remaining buffers out to disk */ xfs_quiesce_fs(mp); ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0); /* Push the superblock and write an unmount record */ error = xfs_log_sbcount(mp, 1); if (error) xfs_fs_cmn_err(CE_WARN, mp, "xfs_attr_quiesce: failed to log sb changes. " "Frozen image may not be consistent."); xfs_log_unmount_write(mp); xfs_unmountfs_writesb(mp); } /* * xfs_unmount_flush implements a set of flush operation on special * inodes, which are needed as a separate set of operations so that * they can be called as part of relocation process. */ int xfs_unmount_flush( xfs_mount_t *mp, /* Mount structure we are getting rid of. */ int relocation) /* Called from vfs relocation. */ { xfs_inode_t *rip = mp->m_rootip; xfs_inode_t *rbmip; xfs_inode_t *rsumip = NULL; int error; xfs_ilock(rip, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); xfs_iflock(rip); /* * Flush out the real time inodes. */ if ((rbmip = mp->m_rbmip) != NULL) { xfs_ilock(rbmip, XFS_ILOCK_EXCL); xfs_iflock(rbmip); error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC); xfs_iunlock(rbmip, XFS_ILOCK_EXCL); if (error == EFSCORRUPTED) goto fscorrupt_out; ASSERT(vn_count(VFS_I(rbmip)) == 1); rsumip = mp->m_rsumip; xfs_ilock(rsumip, XFS_ILOCK_EXCL); xfs_iflock(rsumip); error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC); xfs_iunlock(rsumip, XFS_ILOCK_EXCL); if (error == EFSCORRUPTED) goto fscorrupt_out; ASSERT(vn_count(VFS_I(rsumip)) == 1); } /* * Synchronously flush root inode to disk */ error = xfs_iflush(rip, XFS_IFLUSH_SYNC); if (error == EFSCORRUPTED) goto fscorrupt_out2; if (vn_count(VFS_I(rip)) != 1 && !relocation) { xfs_iunlock(rip, XFS_ILOCK_EXCL); return XFS_ERROR(EBUSY); } /* * Release dquot that rootinode, rbmino and rsumino might be holding, * flush and purge the quota inodes. */ error = XFS_QM_UNMOUNT(mp); if (error == EFSCORRUPTED) goto fscorrupt_out2; if (rbmip) { IRELE(rbmip); IRELE(rsumip); } xfs_iunlock(rip, XFS_ILOCK_EXCL); return 0; fscorrupt_out: xfs_ifunlock(rip); fscorrupt_out2: xfs_iunlock(rip, XFS_ILOCK_EXCL); return XFS_ERROR(EFSCORRUPTED); }