feaa7bba02
This patch fixes the way we have been dealing with unlinked, but still open files. It removes all limits (other than memory for inodes, as per every other filesystem) on numbers of these which we can support on GFS2. It also means that (like other fs) its the responsibility of the last process to close the file to deallocate the storage, rather than the person who did the unlinking. Note that with GFS2, those two events might take place on different nodes. Also there are a number of other changes: o We use the Linux inode subsystem as it was intended to be used, wrt allocating GFS2 inodes o The Linux inode cache is now the point which we use for local enforcement of only holding one copy of the inode in core at once (previous to this we used the glock layer). o We no longer use the unlinked "special" file. We just ignore it completely. This makes unlinking more efficient. o We now use the 4th block allocation state. The previously unused state is used to track unlinked but still open inodes. o gfs2_inoded is no longer needed o Several fields are now no longer needed (and removed) from the in core struct gfs2_inode o Several fields are no longer needed (and removed) from the in core superblock There are a number of future possible optimisations and clean ups which have been made possible by this patch. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
64 lines
2.2 KiB
C
64 lines
2.2 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 v.2.
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*/
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#ifndef __RGRP_DOT_H__
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#define __RGRP_DOT_H__
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void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
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struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, uint64_t blk);
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struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
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struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
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void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
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int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh);
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int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd);
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void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd);
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void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd);
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void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd);
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struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
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void gfs2_alloc_put(struct gfs2_inode *ip);
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int gfs2_inplace_reserve_i(struct gfs2_inode *ip,
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char *file, unsigned int line);
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#define gfs2_inplace_reserve(ip) \
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gfs2_inplace_reserve_i((ip), __FILE__, __LINE__)
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void gfs2_inplace_release(struct gfs2_inode *ip);
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unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, uint64_t block);
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uint64_t gfs2_alloc_data(struct gfs2_inode *ip);
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uint64_t gfs2_alloc_meta(struct gfs2_inode *ip);
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uint64_t gfs2_alloc_di(struct gfs2_inode *ip);
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void gfs2_free_data(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
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void gfs2_free_meta(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen);
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void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, uint64_t blkno);
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void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
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void gfs2_unlink_di(struct inode *inode);
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struct gfs2_rgrp_list {
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unsigned int rl_rgrps;
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unsigned int rl_space;
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struct gfs2_rgrpd **rl_rgd;
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struct gfs2_holder *rl_ghs;
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};
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void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist,
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uint64_t block);
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void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state,
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int flags);
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void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
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#endif /* __RGRP_DOT_H__ */
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