9b8df98fc8
This patch is intended to fix the issues reported in bz #457798. Instead of having the metafs as a separate filesystem, it becomes a second root of gfs2. As a result it will appear as type gfs2 in /proc/mounts, but it is still possible (for backwards compatibility purposes) to mount it as type gfs2meta. A new mount flag "meta" is introduced so that its possible to tell the two cases apart in /proc/mounts. As a result it becomes possible to mount type gfs2 with -o meta and get the same result as mounting type gfs2meta. So it is possible to mount just the metafs on its own. Currently if you do this, its then impossible to mount the "normal" root of the gfs2 filesystem without first unmounting the metafs root. I'm not sure if thats a feature or a bug :-) Either way, this is a great improvement on the previous scheme and I've verified that it works ok with bind mounts on both the "normal" root and the metafs root in various combinations. There were also a bunch of functions in super.c which didn't belong there, so this moves them into ops_fstype.c where they can be static. Hopefully the mount/umount sequence is now more obvious as a result. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Alexander Viro <aviro@redhat.com>
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#ifndef __SUPER_DOT_H__
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#define __SUPER_DOT_H__
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#include "incore.h"
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void gfs2_lm_unmount(struct gfs2_sbd *sdp);
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static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp)
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{
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unsigned int x;
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spin_lock(&sdp->sd_jindex_spin);
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x = sdp->sd_journals;
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spin_unlock(&sdp->sd_jindex_spin);
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return x;
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}
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int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh);
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void gfs2_jindex_free(struct gfs2_sbd *sdp);
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struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid);
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void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid);
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struct gfs2_jdesc *gfs2_jdesc_find_dirty(struct gfs2_sbd *sdp);
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int gfs2_jdesc_check(struct gfs2_jdesc *jd);
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int gfs2_lookup_in_master_dir(struct gfs2_sbd *sdp, char *filename,
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struct gfs2_inode **ipp);
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int gfs2_make_fs_rw(struct gfs2_sbd *sdp);
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int gfs2_statfs_init(struct gfs2_sbd *sdp);
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void gfs2_statfs_change(struct gfs2_sbd *sdp,
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s64 total, s64 free, s64 dinodes);
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int gfs2_statfs_sync(struct gfs2_sbd *sdp);
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int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc);
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int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc);
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int gfs2_freeze_fs(struct gfs2_sbd *sdp);
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void gfs2_unfreeze_fs(struct gfs2_sbd *sdp);
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#endif /* __SUPER_DOT_H__ */
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