Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1941 insertions, 0 deletions

diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
new file mode 100644
index 00000000000..00aae9c6a90
--- /dev/null
+++ b/fs/xfs/xfs_vfsops.c
@@ -0,0 +1,1941 @@
+/*
+ * XFS filesystem operations.
+ *
+ * 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 version 2 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_alloc.h"
+#include "xfs_ialloc.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_ag.h"
+#include "xfs_error.h"
+#include "xfs_bmap.h"
+#include "xfs_da_btree.h"
+#include "xfs_rw.h"
+#include "xfs_refcache.h"
+#include "xfs_buf_item.h"
+#include "xfs_extfree_item.h"
+#include "xfs_quota.h"
+#include "xfs_dir2_trace.h"
+#include "xfs_acl.h"
+#include "xfs_attr.h"
+#include "xfs_clnt.h"
+#include "xfs_log_priv.h"
+
+STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
+
+int
+xfs_init(void)
+{
+	extern kmem_zone_t	*xfs_bmap_free_item_zone;
+	extern kmem_zone_t	*xfs_btree_cur_zone;
+	extern kmem_zone_t	*xfs_trans_zone;
+	extern kmem_zone_t	*xfs_buf_item_zone;
+	extern kmem_zone_t	*xfs_dabuf_zone;
+#ifdef XFS_DABUF_DEBUG
+	extern lock_t	        xfs_dabuf_global_lock;
+	spinlock_init(&xfs_dabuf_global_lock, "xfsda");
+#endif
+
+	/*
+	 * Initialize all of the zone allocators we use.
+	 */
+	xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
+						 "xfs_bmap_free_item");
+	xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
+					    "xfs_btree_cur");
+	xfs_inode_zone = kmem_zone_init(sizeof(xfs_inode_t), "xfs_inode");
+	xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
+	xfs_da_state_zone =
+		kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
+	xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
+
+	/*
+	 * The size of the zone allocated buf log item is the maximum
+	 * size possible under XFS.  This wastes a little bit of memory,
+	 * but it is much faster.
+	 */
+	xfs_buf_item_zone =
+		kmem_zone_init((sizeof(xfs_buf_log_item_t) +
+				(((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
+				  NBWORD) * sizeof(int))),
+			       "xfs_buf_item");
+	xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
+				       ((XFS_EFD_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
+				      "xfs_efd_item");
+	xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
+				       ((XFS_EFI_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
+				      "xfs_efi_item");
+	xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
+	xfs_ili_zone = kmem_zone_init(sizeof(xfs_inode_log_item_t), "xfs_ili");
+	xfs_chashlist_zone = kmem_zone_init(sizeof(xfs_chashlist_t),
+					    "xfs_chashlist");
+	xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
+
+	/*
+	 * Allocate global trace buffers.
+	 */
+#ifdef XFS_ALLOC_TRACE
+	xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
+#endif
+#ifdef XFS_BMAP_TRACE
+	xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
+#endif
+#ifdef XFS_BMBT_TRACE
+	xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
+#endif
+#ifdef XFS_DIR_TRACE
+	xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
+#endif
+#ifdef XFS_ATTR_TRACE
+	xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
+#endif
+#ifdef XFS_DIR2_TRACE
+	xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
+#endif
+
+	xfs_dir_startup();
+
+#if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
+	xfs_error_test_init();
+#endif /* DEBUG || INDUCE_IO_ERROR */
+
+	xfs_init_procfs();
+	xfs_sysctl_register();
+	return 0;
+}
+
+void
+xfs_cleanup(void)
+{
+	extern kmem_zone_t	*xfs_bmap_free_item_zone;
+	extern kmem_zone_t	*xfs_btree_cur_zone;
+	extern kmem_zone_t	*xfs_inode_zone;
+	extern kmem_zone_t	*xfs_trans_zone;
+	extern kmem_zone_t	*xfs_da_state_zone;
+	extern kmem_zone_t	*xfs_dabuf_zone;
+	extern kmem_zone_t	*xfs_efd_zone;
+	extern kmem_zone_t	*xfs_efi_zone;
+	extern kmem_zone_t	*xfs_buf_item_zone;
+	extern kmem_zone_t	*xfs_chashlist_zone;
+
+	xfs_cleanup_procfs();
+	xfs_sysctl_unregister();
+	xfs_refcache_destroy();
+	xfs_acl_zone_destroy(xfs_acl_zone);
+
+#ifdef XFS_DIR2_TRACE
+	ktrace_free(xfs_dir2_trace_buf);
+#endif
+#ifdef XFS_ATTR_TRACE
+	ktrace_free(xfs_attr_trace_buf);
+#endif
+#ifdef XFS_DIR_TRACE
+	ktrace_free(xfs_dir_trace_buf);
+#endif
+#ifdef XFS_BMBT_TRACE
+	ktrace_free(xfs_bmbt_trace_buf);
+#endif
+#ifdef XFS_BMAP_TRACE
+	ktrace_free(xfs_bmap_trace_buf);
+#endif
+#ifdef XFS_ALLOC_TRACE
+	ktrace_free(xfs_alloc_trace_buf);
+#endif
+
+	kmem_cache_destroy(xfs_bmap_free_item_zone);
+	kmem_cache_destroy(xfs_btree_cur_zone);
+	kmem_cache_destroy(xfs_inode_zone);
+	kmem_cache_destroy(xfs_trans_zone);
+	kmem_cache_destroy(xfs_da_state_zone);
+	kmem_cache_destroy(xfs_dabuf_zone);
+	kmem_cache_destroy(xfs_buf_item_zone);
+	kmem_cache_destroy(xfs_efd_zone);
+	kmem_cache_destroy(xfs_efi_zone);
+	kmem_cache_destroy(xfs_ifork_zone);
+	kmem_cache_destroy(xfs_ili_zone);
+	kmem_cache_destroy(xfs_chashlist_zone);
+}
+
+/*
+ * xfs_start_flags
+ *
+ * This function fills in xfs_mount_t fields based on mount args.
+ * Note: the superblock has _not_ yet been read in.
+ */
+STATIC int
+xfs_start_flags(
+	struct vfs		*vfs,
+	struct xfs_mount_args	*ap,
+	struct xfs_mount	*mp)
+{
+	/* Values are in BBs */
+	if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
+		/*
+		 * At this point the superblock has not been read
+		 * in, therefore we do not know the block size.
+		 * Before the mount call ends we will convert
+		 * these to FSBs.
+		 */
+		mp->m_dalign = ap->sunit;
+		mp->m_swidth = ap->swidth;
+	}
+
+	if (ap->logbufs != -1 &&
+#if defined(DEBUG) || defined(XLOG_NOLOG)
+	    ap->logbufs != 0 &&
+#endif
+	    (ap->logbufs < XLOG_MIN_ICLOGS ||
+	     ap->logbufs > XLOG_MAX_ICLOGS)) {
+		cmn_err(CE_WARN,
+			"XFS: invalid logbufs value: %d [not %d-%d]",
+			ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
+		return XFS_ERROR(EINVAL);
+	}
+	mp->m_logbufs = ap->logbufs;
+	if (ap->logbufsize != -1 &&
+	    ap->logbufsize != 16 * 1024 &&
+	    ap->logbufsize != 32 * 1024 &&
+	    ap->logbufsize != 64 * 1024 &&
+	    ap->logbufsize != 128 * 1024 &&
+	    ap->logbufsize != 256 * 1024) {
+		cmn_err(CE_WARN,
+	"XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
+			ap->logbufsize);
+		return XFS_ERROR(EINVAL);
+	}
+	mp->m_ihsize = ap->ihashsize;
+	mp->m_logbsize = ap->logbufsize;
+	mp->m_fsname_len = strlen(ap->fsname) + 1;
+	mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
+	strcpy(mp->m_fsname, ap->fsname);
+
+	if (ap->flags & XFSMNT_WSYNC)
+		mp->m_flags |= XFS_MOUNT_WSYNC;
+#if XFS_BIG_INUMS
+	if (ap->flags & XFSMNT_INO64) {
+		mp->m_flags |= XFS_MOUNT_INO64;
+		mp->m_inoadd = XFS_INO64_OFFSET;
+	}
+#endif
+	if (ap->flags & XFSMNT_NOATIME)
+		mp->m_flags |= XFS_MOUNT_NOATIME;
+
+	if (ap->flags & XFSMNT_RETERR)
+		mp->m_flags |= XFS_MOUNT_RETERR;
+
+	if (ap->flags & XFSMNT_NOALIGN)
+		mp->m_flags |= XFS_MOUNT_NOALIGN;
+
+	if (ap->flags & XFSMNT_SWALLOC)
+		mp->m_flags |= XFS_MOUNT_SWALLOC;
+
+	if (ap->flags & XFSMNT_OSYNCISOSYNC)
+		mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
+
+	if (ap->flags & XFSMNT_32BITINODES)
+		mp->m_flags |= (XFS_MOUNT_32BITINODES | XFS_MOUNT_32BITINOOPT);
+
+	if (ap->flags & XFSMNT_IOSIZE) {
+		if (ap->iosizelog > XFS_MAX_IO_LOG ||
+		    ap->iosizelog < XFS_MIN_IO_LOG) {
+			cmn_err(CE_WARN,
+		"XFS: invalid log iosize: %d [not %d-%d]",
+				ap->iosizelog, XFS_MIN_IO_LOG,
+				XFS_MAX_IO_LOG);
+			return XFS_ERROR(EINVAL);
+		}
+
+		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
+		mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
+	}
+
+	if (ap->flags & XFSMNT_IHASHSIZE)
+		mp->m_flags |= XFS_MOUNT_IHASHSIZE;
+
+	if (ap->flags & XFSMNT_IDELETE)
+		mp->m_flags |= XFS_MOUNT_IDELETE;
+
+	if (ap->flags & XFSMNT_DIRSYNC)
+		mp->m_flags |= XFS_MOUNT_DIRSYNC;
+
+	/*
+	 * no recovery flag requires a read-only mount
+	 */
+	if (ap->flags & XFSMNT_NORECOVERY) {
+		if (!(vfs->vfs_flag & VFS_RDONLY)) {
+			cmn_err(CE_WARN,
+	"XFS: tried to mount a FS read-write without recovery!");
+			return XFS_ERROR(EINVAL);
+		}
+		mp->m_flags |= XFS_MOUNT_NORECOVERY;
+	}
+
+	if (ap->flags & XFSMNT_NOUUID)
+		mp->m_flags |= XFS_MOUNT_NOUUID;
+	if (ap->flags & XFSMNT_NOLOGFLUSH)
+		mp->m_flags |= XFS_MOUNT_NOLOGFLUSH;
+
+	return 0;
+}
+
+/*
+ * This function fills in xfs_mount_t fields based on mount args.
+ * Note: the superblock _has_ now been read in.
+ */
+STATIC int
+xfs_finish_flags(
+	struct vfs		*vfs,
+	struct xfs_mount_args	*ap,
+	struct xfs_mount	*mp)
+{
+	int			ronly = (vfs->vfs_flag & VFS_RDONLY);
+
+	/* Fail a mount where the logbuf is smaller then the log stripe */
+	if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
+		if ((ap->logbufsize == -1) &&
+		    (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
+			mp->m_logbsize = mp->m_sb.sb_logsunit;
+		} else if (ap->logbufsize < mp->m_sb.sb_logsunit) {
+			cmn_err(CE_WARN,
+	"XFS: logbuf size must be greater than or equal to log stripe size");
+			return XFS_ERROR(EINVAL);
+		}
+	} else {
+		/* Fail a mount if the logbuf is larger than 32K */
+		if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
+			cmn_err(CE_WARN,
+	"XFS: logbuf size for version 1 logs must be 16K or 32K");
+			return XFS_ERROR(EINVAL);
+		}
+	}
+
+	/*
+	 * prohibit r/w mounts of read-only filesystems
+	 */
+	if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
+		cmn_err(CE_WARN,
+	"XFS: cannot mount a read-only filesystem as read-write");
+		return XFS_ERROR(EROFS);
+	}
+
+	/*
+	 * disallow mount attempts with (IRIX) project quota enabled
+	 */
+	if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
+	    (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT)) {
+		cmn_err(CE_WARN,
+	"XFS: cannot mount a filesystem with IRIX project quota enabled");
+		return XFS_ERROR(ENOSYS);
+	}
+
+	/*
+	 * check for shared mount.
+	 */
+	if (ap->flags & XFSMNT_SHARED) {
+		if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
+			return XFS_ERROR(EINVAL);
+
+		/*
+		 * For IRIX 6.5, shared mounts must have the shared
+		 * version bit set, have the persistent readonly
+		 * field set, must be version 0 and can only be mounted
+		 * read-only.
+		 */
+		if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
+		     (mp->m_sb.sb_shared_vn != 0))
+			return XFS_ERROR(EINVAL);
+
+		mp->m_flags |= XFS_MOUNT_SHARED;
+
+		/*
+		 * Shared XFS V0 can't deal with DMI.  Return EINVAL.
+		 */
+		if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
+			return XFS_ERROR(EINVAL);
+	}
+
+	return 0;
+}
+
+/*
+ * xfs_mount
+ *
+ * The file system configurations are:
+ *	(1) device (partition) with data and internal log
+ *	(2) logical volume with data and log subvolumes.
+ *	(3) logical volume with data, log, and realtime subvolumes.
+ *
+ * We only have to handle opening the log and realtime volumes here if
+ * they are present.  The data subvolume has already been opened by
+ * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
+ */
+STATIC int
+xfs_mount(
+	struct bhv_desc		*bhvp,
+	struct xfs_mount_args	*args,
+	cred_t			*credp)
+{
+	struct vfs		*vfsp = bhvtovfs(bhvp);
+	struct bhv_desc		*p;
+	struct xfs_mount	*mp = XFS_BHVTOM(bhvp);
+	struct block_device	*ddev, *logdev, *rtdev;
+	int			flags = 0, error;
+
+	ddev = vfsp->vfs_super->s_bdev;
+	logdev = rtdev = NULL;
+
+	/*
+	 * Setup xfs_mount function vectors from available behaviors
+	 */
+	p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
+	mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
+	p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
+	mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
+	p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
+	mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
+
+	/*
+	 * Open real time and log devices - order is important.
+	 */
+	if (args->logname[0]) {
+		error = xfs_blkdev_get(mp, args->logname, &logdev);
+		if (error)
+			return error;
+	}
+	if (args->rtname[0]) {
+		error = xfs_blkdev_get(mp, args->rtname, &rtdev);
+		if (error) {
+			xfs_blkdev_put(logdev);
+			return error;
+		}
+
+		if (rtdev == ddev || rtdev == logdev) {
+			cmn_err(CE_WARN,
+	"XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
+			xfs_blkdev_put(logdev);
+			xfs_blkdev_put(rtdev);
+			return EINVAL;
+		}
+	}
+
+	/*
+	 * Setup xfs_mount buffer target pointers
+	 */
+	error = ENOMEM;
+	mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
+	if (!mp->m_ddev_targp) {
+		xfs_blkdev_put(logdev);
+		xfs_blkdev_put(rtdev);
+		return error;
+	}
+	if (rtdev) {
+		mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
+		if (!mp->m_rtdev_targp)
+			goto error0;
+	}
+	mp->m_logdev_targp = (logdev && logdev != ddev) ?
+				xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
+	if (!mp->m_logdev_targp)
+		goto error0;
+
+	/*
+	 * Setup flags based on mount(2) options and then the superblock
+	 */
+	error = xfs_start_flags(vfsp, args, mp);
+	if (error)
+		goto error1;
+	error = xfs_readsb(mp);
+	if (error)
+		goto error1;
+	error = xfs_finish_flags(vfsp, args, mp);
+	if (error)
+		goto error2;
+
+	/*
+	 * Setup xfs_mount buffer target pointers based on superblock
+	 */
+	error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
+				    mp->m_sb.sb_sectsize);
+	if (!error && logdev && logdev != ddev) {
+		unsigned int	log_sector_size = BBSIZE;
+
+		if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
+			log_sector_size = mp->m_sb.sb_logsectsize;
+		error = xfs_setsize_buftarg(mp->m_logdev_targp,
+					    mp->m_sb.sb_blocksize,
+					    log_sector_size);
+	}
+	if (!error && rtdev)
+		error = xfs_setsize_buftarg(mp->m_rtdev_targp,
+					    mp->m_sb.sb_blocksize,
+					    mp->m_sb.sb_sectsize);
+	if (error)
+		goto error2;
+
+	error = XFS_IOINIT(vfsp, args, flags);
+	if (!error)
+		return 0;
+error2:
+	if (mp->m_sb_bp)
+		xfs_freesb(mp);
+error1:
+	xfs_binval(mp->m_ddev_targp);
+	if (logdev && logdev != ddev)
+		xfs_binval(mp->m_logdev_targp);
+	if (rtdev)
+		xfs_binval(mp->m_rtdev_targp);
+error0:
+	xfs_unmountfs_close(mp, credp);
+	return error;
+}
+
+STATIC int
+xfs_unmount(
+	bhv_desc_t	*bdp,
+	int		flags,
+	cred_t		*credp)
+{
+	struct vfs	*vfsp = bhvtovfs(bdp);
+	xfs_mount_t	*mp = XFS_BHVTOM(bdp);
+	xfs_inode_t	*rip;
+	vnode_t		*rvp;
+	int		unmount_event_wanted = 0;
+	int		unmount_event_flags = 0;
+	int		xfs_unmountfs_needed = 0;
+	int		error;
+
+	rip = mp->m_rootip;
+	rvp = XFS_ITOV(rip);
+
+	if (vfsp->vfs_flag & VFS_DMI) {
+		error = XFS_SEND_PREUNMOUNT(mp, vfsp,
+				rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
+				NULL, NULL, 0, 0,
+				(mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
+					0:DM_FLAGS_UNWANTED);
+			if (error)
+				return XFS_ERROR(error);
+		unmount_event_wanted = 1;
+		unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
+					0 : DM_FLAGS_UNWANTED;
+	}
+
+	/*
+	 * First blow any referenced inode from this file system
+	 * out of the reference cache, and delete the timer.
+	 */
+	xfs_refcache_purge_mp(mp);
+
+	XFS_bflush(mp->m_ddev_targp);
+	error = xfs_unmount_flush(mp, 0);
+	if (error)
+		goto out;
+
+	ASSERT(vn_count(rvp) == 1);
+
+	/*
+	 * Drop the reference count
+	 */
+	VN_RELE(rvp);
+
+	/*
+	 * If we're forcing a shutdown, typically because of a media error,
+	 * we want to make sure we invalidate dirty pages that belong to
+	 * referenced vnodes as well.
+	 */
+	if (XFS_FORCED_SHUTDOWN(mp)) {
+		error = xfs_sync(&mp->m_bhv,
+			 (SYNC_WAIT | SYNC_CLOSE), credp);
+		ASSERT(error != EFSCORRUPTED);
+	}
+	xfs_unmountfs_needed = 1;
+
+out:
+	/*	Send DMAPI event, if required.
+	 *	Then do xfs_unmountfs() if needed.
+	 *	Then return error (or zero).
+	 */
+	if (unmount_event_wanted) {
+		/* Note: mp structure must still exist for
+		 * XFS_SEND_UNMOUNT() call.
+		 */
+		XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
+			DM_RIGHT_NULL, 0, error, unmount_event_flags);
+	}
+	if (xfs_unmountfs_needed) {
+		/*
+		 * Call common unmount function to flush to disk
+		 * and free the super block buffer & mount structures.
+		 */
+		xfs_unmountfs(mp, credp);
+	}
+
+	return XFS_ERROR(error);
+}
+
+#define REMOUNT_READONLY_FLAGS	(SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
+
+STATIC int
+xfs_mntupdate(
+	bhv_desc_t			*bdp,
+	int				*flags,
+	struct xfs_mount_args		*args)
+{
+	struct vfs	*vfsp = bhvtovfs(bdp);
+	xfs_mount_t	*mp = XFS_BHVTOM(bdp);
+	int		pincount, error;
+	int		count = 0;
+
+	if (args->flags & XFSMNT_NOATIME)
+		mp->m_flags |= XFS_MOUNT_NOATIME;
+	else
+		mp->m_flags &= ~XFS_MOUNT_NOATIME;
+
+	if (!(vfsp->vfs_flag & VFS_RDONLY)) {
+		VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
+	}
+
+	if (*flags & MS_RDONLY) {
+		xfs_refcache_purge_mp(mp);
+		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 {
+			VFS_SYNC(vfsp, REMOUNT_READONLY_FLAGS, NULL, error);
+			pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
+			if (!pincount) {
+				delay(50);
+				count++;
+			}
+		} while (count < 2);
+
+		/* Ok now write out an unmount record */
+		xfs_log_unmount_write(mp);
+		xfs_unmountfs_writesb(mp);
+		vfsp->vfs_flag |= VFS_RDONLY;
+	} else {
+		vfsp->vfs_flag &= ~VFS_RDONLY;
+	}
+
+	return 0;
+}
+
+/*
+ * 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;
+	vnode_t		*rvp = XFS_ITOV(rip);
+	int		error;
+
+	xfs_ilock(rip, XFS_ILOCK_EXCL);
+	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(XFS_ITOV(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(XFS_ITOV(rsumip)) == 1);
+	}
+
+	/*
+	 * Synchronously flush root inode to disk
+	 */
+	error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
+	if (error == EFSCORRUPTED)
+		goto fscorrupt_out2;
+
+	if (vn_count(rvp) != 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) {
+		VN_RELE(XFS_ITOV(rbmip));
+		VN_RELE(XFS_ITOV(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);
+}
+
+/*
+ * xfs_root extracts the root vnode from a vfs.
+ *
+ * vfsp -- the vfs struct for the desired file system
+ * vpp  -- address of the caller's vnode pointer which should be
+ *         set to the desired fs root vnode
+ */
+STATIC int
+xfs_root(
+	bhv_desc_t	*bdp,
+	vnode_t		**vpp)
+{
+	vnode_t		*vp;
+
+	vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
+	VN_HOLD(vp);
+	*vpp = vp;
+	return 0;
+}
+
+/*
+ * xfs_statvfs
+ *
+ * Fill in the statvfs structure for the given file system.  We use
+ * the superblock lock in the mount structure to ensure a consistent
+ * snapshot of the counters returned.
+ */
+STATIC int
+xfs_statvfs(
+	bhv_desc_t	*bdp,
+	xfs_statfs_t	*statp,
+	vnode_t		*vp)
+{
+	__uint64_t	fakeinos;
+	xfs_extlen_t	lsize;
+	xfs_mount_t	*mp;
+	xfs_sb_t	*sbp;
+	unsigned long	s;
+	u64 id;
+
+	mp = XFS_BHVTOM(bdp);
+	sbp = &(mp->m_sb);
+
+	statp->f_type = XFS_SB_MAGIC;
+
+	s = XFS_SB_LOCK(mp);
+	statp->f_bsize = sbp->sb_blocksize;
+	lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
+	statp->f_blocks = sbp->sb_dblocks - lsize;
+	statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
+	fakeinos = statp->f_bfree << sbp->sb_inopblog;
+#if XFS_BIG_INUMS
+	fakeinos += mp->m_inoadd;
+#endif
+	statp->f_files =
+	    MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
+	if (mp->m_maxicount)
+#if XFS_BIG_INUMS
+		if (!mp->m_inoadd)
+#endif
+			statp->f_files = min_t(typeof(statp->f_files),
+						statp->f_files,
+						mp->m_maxicount);
+	statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
+	XFS_SB_UNLOCK(mp, s);
+
+	id = huge_encode_dev(mp->m_dev);
+	statp->f_fsid.val[0] = (u32)id;
+	statp->f_fsid.val[1] = (u32)(id >> 32);
+	statp->f_namelen = MAXNAMELEN - 1;
+
+	return 0;
+}
+
+
+/*
+ * xfs_sync flushes any pending I/O to file system vfsp.
+ *
+ * This routine is called by vfs_sync() to make sure that things make it
+ * out to disk eventually, on sync() system calls to flush out everything,
+ * and when the file system is unmounted.  For the vfs_sync() case, all
+ * we really need to do is sync out the log to make all of our meta-data
+ * updates permanent (except for timestamps).  For calls from pflushd(),
+ * dirty pages are kept moving by calling pdflush() on the inodes
+ * containing them.  We also flush the inodes that we can lock without
+ * sleeping and the superblock if we can lock it without sleeping from
+ * vfs_sync() so that items at the tail of the log are always moving out.
+ *
+ * Flags:
+ *      SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
+ *		       to sleep if we can help it.  All we really need
+ *		       to do is ensure that the log is synced at least
+ *		       periodically.  We also push the inodes and
+ *		       superblock if we can lock them without sleeping
+ *			and they are not pinned.
+ *      SYNC_ATTR    - We need to flush the inodes.  If SYNC_BDFLUSH is not
+ *		       set, then we really want to lock each inode and flush
+ *		       it.
+ *      SYNC_WAIT    - All the flushes that take place in this call should
+ *		       be synchronous.
+ *      SYNC_DELWRI  - This tells us to push dirty pages associated with
+ *		       inodes.  SYNC_WAIT and SYNC_BDFLUSH are used to
+ *		       determine if they should be flushed sync, async, or
+ *		       delwri.
+ *      SYNC_CLOSE   - This flag is passed when the system is being
+ *		       unmounted.  We should sync and invalidate everthing.
+ *      SYNC_FSDATA  - This indicates that the caller would like to make
+ *		       sure the superblock is safe on disk.  We can ensure
+ *		       this by simply makeing sure the log gets flushed
+ *		       if SYNC_BDFLUSH is set, and by actually writing it
+ *		       out otherwise.
+ *
+ */
+/*ARGSUSED*/
+STATIC int
+xfs_sync(
+	bhv_desc_t	*bdp,
+	int		flags,
+	cred_t		*credp)
+{
+	xfs_mount_t	*mp;
+
+	mp = XFS_BHVTOM(bdp);
+	return (xfs_syncsub(mp, flags, 0, NULL));
+}
+
+/*
+ * xfs sync routine for internal use
+ *
+ * This routine supports all of the flags defined for the generic VFS_SYNC
+ * interface as explained above under xfs_sync.  In the interests of not
+ * changing interfaces within the 6.5 family, additional internallly-
+ * required functions are specified within a separate xflags parameter,
+ * only available by calling this routine.
+ *
+ */
+STATIC int
+xfs_sync_inodes(
+	xfs_mount_t	*mp,
+	int		flags,
+	int             xflags,
+	int             *bypassed)
+{
+	xfs_inode_t	*ip = NULL;
+	xfs_inode_t	*ip_next;
+	xfs_buf_t	*bp;
+	vnode_t		*vp = NULL;
+	vmap_t		vmap;
+	int		error;
+	int		last_error;
+	uint64_t	fflag;
+	uint		lock_flags;
+	uint		base_lock_flags;
+	boolean_t	mount_locked;
+	boolean_t	vnode_refed;
+	int		preempt;
+	xfs_dinode_t	*dip;
+	xfs_iptr_t	*ipointer;
+#ifdef DEBUG
+	boolean_t	ipointer_in = B_FALSE;
+
+#define IPOINTER_SET	ipointer_in = B_TRUE
+#define IPOINTER_CLR	ipointer_in = B_FALSE
+#else
+#define IPOINTER_SET
+#define IPOINTER_CLR
+#endif
+
+
+/* Insert a marker record into the inode list after inode ip. The list
+ * must be locked when this is called. After the call the list will no
+ * longer be locked.
+ */
+#define IPOINTER_INSERT(ip, mp)	{ \
+		ASSERT(ipointer_in == B_FALSE); \
+		ipointer->ip_mnext = ip->i_mnext; \
+		ipointer->ip_mprev = ip; \
+		ip->i_mnext = (xfs_inode_t *)ipointer; \
+		ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
+		preempt = 0; \
+		XFS_MOUNT_IUNLOCK(mp); \
+		mount_locked = B_FALSE; \
+		IPOINTER_SET; \
+	}
+
+/* Remove the marker from the inode list. If the marker was the only item
+ * in the list then there are no remaining inodes and we should zero out
+ * the whole list. If we are the current head of the list then move the head
+ * past us.
+ */
+#define IPOINTER_REMOVE(ip, mp)	{ \
+		ASSERT(ipointer_in == B_TRUE); \
+		if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
+			ip = ipointer->ip_mnext; \
+			ip->i_mprev = ipointer->ip_mprev; \
+			ipointer->ip_mprev->i_mnext = ip; \
+			if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
+				mp->m_inodes = ip; \
+			} \
+		} else { \
+			ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
+			mp->m_inodes = NULL; \
+			ip = NULL; \
+		} \
+		IPOINTER_CLR; \
+	}
+
+#define XFS_PREEMPT_MASK	0x7f
+
+	if (bypassed)
+		*bypassed = 0;
+	if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
+		return 0;
+	error = 0;
+	last_error = 0;
+	preempt = 0;
+
+	/* Allocate a reference marker */
+	ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
+
+	fflag = XFS_B_ASYNC;		/* default is don't wait */
+	if (flags & SYNC_BDFLUSH)
+		fflag = XFS_B_DELWRI;
+	if (flags & SYNC_WAIT)
+		fflag = 0;		/* synchronous overrides all */
+
+	base_lock_flags = XFS_ILOCK_SHARED;
+	if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
+		/*
+		 * We need the I/O lock if we're going to call any of
+		 * the flush/inval routines.
+		 */
+		base_lock_flags |= XFS_IOLOCK_SHARED;
+	}
+
+	XFS_MOUNT_ILOCK(mp);
+
+	ip = mp->m_inodes;
+
+	mount_locked = B_TRUE;
+	vnode_refed  = B_FALSE;
+
+	IPOINTER_CLR;
+
+	do {
+		ASSERT(ipointer_in == B_FALSE);
+		ASSERT(vnode_refed == B_FALSE);
+
+		lock_flags = base_lock_flags;
+
+		/*
+		 * There were no inodes in the list, just break out
+		 * of the loop.
+		 */
+		if (ip == NULL) {
+			break;
+		}
+
+		/*
+		 * We found another sync thread marker - skip it
+		 */
+		if (ip->i_mount == NULL) {
+			ip = ip->i_mnext;
+			continue;
+		}
+
+		vp = XFS_ITOV_NULL(ip);
+
+		/*
+		 * If the vnode is gone then this is being torn down,
+		 * call reclaim if it is flushed, else let regular flush
+		 * code deal with it later in the loop.
+		 */
+
+		if (vp == NULL) {
+			/* Skip ones already in reclaim */
+			if (ip->i_flags & XFS_IRECLAIM) {
+				ip = ip->i_mnext;
+				continue;
+			}
+			if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
+				ip = ip->i_mnext;
+			} else if ((xfs_ipincount(ip) == 0) &&
+				    xfs_iflock_nowait(ip)) {
+				IPOINTER_INSERT(ip, mp);
+
+				xfs_finish_reclaim(ip, 1,
+						XFS_IFLUSH_DELWRI_ELSE_ASYNC);
+
+				XFS_MOUNT_ILOCK(mp);
+				mount_locked = B_TRUE;
+				IPOINTER_REMOVE(ip, mp);
+			} else {
+				xfs_iunlock(ip, XFS_ILOCK_EXCL);
+				ip = ip->i_mnext;
+			}
+			continue;
+		}
+
+		if (VN_BAD(vp)) {
+			ip = ip->i_mnext;
+			continue;
+		}
+
+		if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
+			XFS_MOUNT_IUNLOCK(mp);
+			kmem_free(ipointer, sizeof(xfs_iptr_t));
+			return 0;
+		}
+
+		/*
+		 * If this is just vfs_sync() or pflushd() calling
+		 * then we can skip inodes for which it looks like
+		 * there is nothing to do.  Since we don't have the
+		 * inode locked this is racey, but these are periodic
+		 * calls so it doesn't matter.  For the others we want
+		 * to know for sure, so we at least try to lock them.
+		 */
+		if (flags & SYNC_BDFLUSH) {
+			if (((ip->i_itemp == NULL) ||
+			     !(ip->i_itemp->ili_format.ilf_fields &
+			       XFS_ILOG_ALL)) &&
+			    (ip->i_update_core == 0)) {
+				ip = ip->i_mnext;
+				continue;
+			}
+		}
+
+		/*
+		 * Try to lock without sleeping.  We're out of order with
+		 * the inode list lock here, so if we fail we need to drop
+		 * the mount lock and try again.  If we're called from
+		 * bdflush() here, then don't bother.
+		 *
+		 * The inode lock here actually coordinates with the
+		 * almost spurious inode lock in xfs_ireclaim() to prevent
+		 * the vnode we handle here without a reference from
+		 * being freed while we reference it.  If we lock the inode
+		 * while it's on the mount list here, then the spurious inode
+		 * lock in xfs_ireclaim() after the inode is pulled from
+		 * the mount list will sleep until we release it here.
+		 * This keeps the vnode from being freed while we reference
+		 * it.  It is also cheaper and simpler than actually doing
+		 * a vn_get() for every inode we touch here.
+		 */
+		if (xfs_ilock_nowait(ip, lock_flags) == 0) {
+
+			if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
+				ip = ip->i_mnext;
+				continue;
+			}
+
+			/*
+			 * We need to unlock the inode list lock in order
+			 * to lock the inode. Insert a marker record into
+			 * the inode list to remember our position, dropping
+			 * the lock is now done inside the IPOINTER_INSERT
+			 * macro.
+			 *
+			 * We also use the inode list lock to protect us
+			 * in taking a snapshot of the vnode version number
+			 * for use in calling vn_get().
+			 */
+			VMAP(vp, vmap);
+			IPOINTER_INSERT(ip, mp);
+
+			vp = vn_get(vp, &vmap);
+			if (vp == NULL) {
+				/*
+				 * The vnode was reclaimed once we let go
+				 * of the inode list lock.  Skip to the
+				 * next list entry. Remove the marker.
+				 */
+
+				XFS_MOUNT_ILOCK(mp);
+
+				mount_locked = B_TRUE;
+				vnode_refed  = B_FALSE;
+
+				IPOINTER_REMOVE(ip, mp);
+
+				continue;
+			}
+
+			xfs_ilock(ip, lock_flags);
+
+			ASSERT(vp == XFS_ITOV(ip));
+			ASSERT(ip->i_mount == mp);
+
+			vnode_refed = B_TRUE;
+		}
+
+		/* From here on in the loop we may have a marker record
+		 * in the inode list.
+		 */
+
+		if ((flags & SYNC_CLOSE)  && (vp != NULL)) {
+			/*
+			 * This is the shutdown case.  We just need to
+			 * flush and invalidate all the pages associated
+			 * with the inode.  Drop the inode lock since
+			 * we can't hold it across ca