18ec7d5c3f
This is a very large patch, with a few still to be resolved issues
so you might want to check out the previous head of the tree since
this is known to be unstable. Fixes for the various bugs will be
forthcoming shortly.
This patch removes the special data format which has been used
up till now for journaled data files. Directories still retain the
old format so that they will remain on disk compatible with earlier
releases. As a result you can now do the following with journaled
data files:
1) mmap them
2) export them over NFS
3) convert to/from normal files whenever you want to (the zero length
restriction is gone)
In addition the level at which GFS' locking is done has changed for all
files (since they all now use the page cache) such that the locking is
done at the page cache level rather than the level of the fs operations.
This should mean that things like loopback mounts and other things which
touch the page cache directly should now work.
Current known issues:
1. There is a lock mode inversion problem related to the resource
group hold function which needs to be resolved.
2. Any significant amount of I/O causes an oops with an offset of hex 320
(NULL pointer dereference) which appears to be related to a journaled data
buffer appearing on a list where it shouldn't be.
3. Direct I/O writes are disabled for the time being (will reappear later)
4. There is probably a deadlock between the page lock and GFS' locks under
certain combinations of mmap and fs operation I/O.
5. Issue relating to ref counting on internally used inodes causes a hang
on umount (discovered before this patch, and not fixed by it)
6. One part of the directory metadata is different from GFS1 and will need
to be resolved before next release.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2005 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 v.2.
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*/
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#ifndef __TRANS_DOT_H__
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#define __TRANS_DOT_H__
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#define RES_DINODE 1
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#define RES_INDIRECT 1
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#define RES_JDATA 1
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#define RES_DATA 1
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#define RES_LEAF 1
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#define RES_RG_BIT 2
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#define RES_EATTR 1
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#define RES_UNLINKED 1
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#define RES_STATFS 1
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#define RES_QUOTA 2
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#define gfs2_trans_begin(sdp, blocks, revokes) \
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gfs2_trans_begin_i((sdp), (blocks), (revokes), __FILE__, __LINE__)
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int gfs2_trans_begin_i(struct gfs2_sbd *sdp,
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unsigned int blocks, unsigned int revokes,
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char *file, unsigned int line);
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void gfs2_trans_end(struct gfs2_sbd *sdp);
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void gfs2_trans_add_gl(struct gfs2_glock *gl);
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void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta);
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void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno);
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void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno);
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void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd);
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#endif /* __TRANS_DOT_H__ */
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