009d851837
Since the start of GFS2, an "extra" inode has been used to store the metadata belonging to each inode. The only reason for using this inode was to have an extra address space, the other fields were unused. This means that the memory usage was rather inefficient. The reason for keeping each inode's metadata in a separate address space is that when glocks are requested on remote nodes, we need to be able to efficiently locate the data and metadata which relating to that glock (inode) in order to sync or sync and invalidate it (depending on the remotely requested lock mode). This patch adds a new type of glock, which has in addition to its normal fields, has an address space. This applies to all inode and rgrp glocks (but to no other glock types which remain as before). As a result, we no longer need to have the second inode. This results in three major improvements: 1. A saving of approx 25% of memory used in caching inodes 2. A removal of the circular dependency between inodes and glocks 3. No confusion between "normal" and "metadata" inodes in super.c Although the first of these is the more immediately apparent, the second is just as important as it now enables a number of clean ups at umount time. Those will be the subject of future patches. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
173 lines
5 KiB
C
173 lines
5 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 __UTIL_DOT_H__
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#define __UTIL_DOT_H__
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#include "incore.h"
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#define fs_printk(level, fs, fmt, arg...) \
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printk(level "GFS2: fsid=%s: " fmt , (fs)->sd_fsname , ## arg)
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#define fs_info(fs, fmt, arg...) \
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fs_printk(KERN_INFO , fs , fmt , ## arg)
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#define fs_warn(fs, fmt, arg...) \
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fs_printk(KERN_WARNING , fs , fmt , ## arg)
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#define fs_err(fs, fmt, arg...) \
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fs_printk(KERN_ERR, fs , fmt , ## arg)
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void gfs2_assert_i(struct gfs2_sbd *sdp);
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#define gfs2_assert(sdp, assertion) \
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do { \
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if (unlikely(!(assertion))) { \
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gfs2_assert_i(sdp); \
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BUG(); \
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} \
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} while (0)
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int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
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const char *function, char *file, unsigned int line);
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#define gfs2_assert_withdraw(sdp, assertion) \
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((likely(assertion)) ? 0 : gfs2_assert_withdraw_i((sdp), #assertion, \
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__func__, __FILE__, __LINE__))
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int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
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const char *function, char *file, unsigned int line);
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#define gfs2_assert_warn(sdp, assertion) \
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((likely(assertion)) ? 0 : gfs2_assert_warn_i((sdp), #assertion, \
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__func__, __FILE__, __LINE__))
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int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide,
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const char *function, char *file, unsigned int line);
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#define gfs2_consist(sdp) \
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gfs2_consist_i((sdp), 0, __func__, __FILE__, __LINE__)
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int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
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const char *function, char *file, unsigned int line);
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#define gfs2_consist_inode(ip) \
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gfs2_consist_inode_i((ip), 0, __func__, __FILE__, __LINE__)
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int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
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const char *function, char *file, unsigned int line);
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#define gfs2_consist_rgrpd(rgd) \
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gfs2_consist_rgrpd_i((rgd), 0, __func__, __FILE__, __LINE__)
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int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
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const char *type, const char *function,
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char *file, unsigned int line);
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static inline int gfs2_meta_check_i(struct gfs2_sbd *sdp,
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struct buffer_head *bh,
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const char *function,
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char *file, unsigned int line)
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{
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struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
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u32 magic = be32_to_cpu(mh->mh_magic);
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if (unlikely(magic != GFS2_MAGIC))
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return gfs2_meta_check_ii(sdp, bh, "magic number", function,
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file, line);
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return 0;
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}
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#define gfs2_meta_check(sdp, bh) \
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gfs2_meta_check_i((sdp), (bh), __func__, __FILE__, __LINE__)
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int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
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u16 type, u16 t,
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const char *function,
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char *file, unsigned int line);
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static inline int gfs2_metatype_check_i(struct gfs2_sbd *sdp,
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struct buffer_head *bh,
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u16 type,
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const char *function,
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char *file, unsigned int line)
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{
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struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
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u32 magic = be32_to_cpu(mh->mh_magic);
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u16 t = be32_to_cpu(mh->mh_type);
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if (unlikely(magic != GFS2_MAGIC))
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return gfs2_meta_check_ii(sdp, bh, "magic number", function,
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file, line);
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if (unlikely(t != type))
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return gfs2_metatype_check_ii(sdp, bh, type, t, function,
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file, line);
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return 0;
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}
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#define gfs2_metatype_check(sdp, bh, type) \
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gfs2_metatype_check_i((sdp), (bh), (type), __func__, __FILE__, __LINE__)
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static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
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u16 format)
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{
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struct gfs2_meta_header *mh;
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mh = (struct gfs2_meta_header *)bh->b_data;
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mh->mh_type = cpu_to_be32(type);
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mh->mh_format = cpu_to_be32(format);
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}
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int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
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char *file, unsigned int line);
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#define gfs2_io_error(sdp) \
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gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);
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int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
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const char *function, char *file, unsigned int line);
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#define gfs2_io_error_bh(sdp, bh) \
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gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__);
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extern struct kmem_cache *gfs2_glock_cachep;
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extern struct kmem_cache *gfs2_glock_aspace_cachep;
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extern struct kmem_cache *gfs2_inode_cachep;
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extern struct kmem_cache *gfs2_bufdata_cachep;
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extern struct kmem_cache *gfs2_rgrpd_cachep;
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extern struct kmem_cache *gfs2_quotad_cachep;
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static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
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unsigned int *p)
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{
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unsigned int x;
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spin_lock(>->gt_spin);
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x = *p;
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spin_unlock(>->gt_spin);
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return x;
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}
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#define gfs2_tune_get(sdp, field) \
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gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)
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void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
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unsigned int bit, int new_value);
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int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...);
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#endif /* __UTIL_DOT_H__ */
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