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71b86f562b
This reduces the size of the directory code by about 3k and gets readdir() to use the functions which were introduced in the previous directory code update. Two memory allocations are merged into one. Eliminates zeroing of some buffers which were never used before they were initialised by other data. There is still scope for further improvement in the directory code. On the logging side, a hand created mutex has been replaced by a standard Linux mutex in the log allocation code. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
245 lines
6.7 KiB
C
245 lines
6.7 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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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/crc32.h>
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#include <linux/gfs2_ondisk.h>
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#include <asm/semaphore.h>
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#include <asm/uaccess.h>
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#include "gfs2.h"
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#include "lm_interface.h"
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#include "incore.h"
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#include "glock.h"
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#include "lm.h"
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#include "util.h"
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kmem_cache_t *gfs2_glock_cachep __read_mostly;
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kmem_cache_t *gfs2_inode_cachep __read_mostly;
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kmem_cache_t *gfs2_bufdata_cachep __read_mostly;
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void gfs2_assert_i(struct gfs2_sbd *sdp)
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{
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printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
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sdp->sd_fsname);
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}
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/**
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* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
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* Returns: -1 if this call withdrew the machine,
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* -2 if it was already withdrawn
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*/
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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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{
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int me;
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me = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname, assertion,
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sdp->sd_fsname, function, file, line);
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dump_stack();
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return (me) ? -1 : -2;
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}
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/**
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* gfs2_assert_warn_i - Print a message to the console if @assertion is false
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* Returns: -1 if we printed something
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* -2 if we didn't
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*/
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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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{
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if (time_before(jiffies,
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sdp->sd_last_warning +
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gfs2_tune_get(sdp, gt_complain_secs) * HZ))
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return -2;
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printk(KERN_WARNING
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"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname, assertion,
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sdp->sd_fsname, function, file, line);
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if (sdp->sd_args.ar_debug)
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BUG();
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else
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dump_stack();
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sdp->sd_last_warning = jiffies;
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return -1;
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}
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/**
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* gfs2_consist_i - Flag a filesystem consistency error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* 0 if it was already withdrawn
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*/
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int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
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char *file, unsigned int line)
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{
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int rv;
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rv = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: filesystem consistency error\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, function, file, line);
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return rv;
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}
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/**
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* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* 0 if it was already withdrawn
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*/
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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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{
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struct gfs2_sbd *sdp = ip->i_sbd;
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int rv;
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rv = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: filesystem consistency error\n"
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"GFS2: fsid=%s: inode = %llu %llu\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, ip->i_num.no_formal_ino, ip->i_num.no_addr,
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sdp->sd_fsname, function, file, line);
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return rv;
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}
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/**
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* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* 0 if it was already withdrawn
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*/
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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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{
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struct gfs2_sbd *sdp = rgd->rd_sbd;
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int rv;
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rv = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: filesystem consistency error\n"
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"GFS2: fsid=%s: RG = %llu\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, rgd->rd_ri.ri_addr,
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sdp->sd_fsname, function, file, line);
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return rv;
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}
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/**
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* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* -2 if it was already withdrawn
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*/
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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, char *file,
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unsigned int line)
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{
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int me;
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me = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: invalid metadata block\n"
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"GFS2: fsid=%s: bh = %llu (%s)\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, (uint64_t)bh->b_blocknr, type,
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sdp->sd_fsname, function, file, line);
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return (me) ? -1 : -2;
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}
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/**
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* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* -2 if it was already withdrawn
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*/
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int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
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uint16_t type, uint16_t t, const char *function,
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char *file, unsigned int line)
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{
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int me;
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me = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: invalid metadata block\n"
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"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, (uint64_t)bh->b_blocknr, type, t,
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sdp->sd_fsname, function, file, line);
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return (me) ? -1 : -2;
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}
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/**
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* gfs2_io_error_i - Flag an I/O error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* 0 if it was already withdrawn
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*/
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int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
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unsigned int line)
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{
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int rv;
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rv = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: I/O error\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, function, file, line);
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return rv;
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}
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/**
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* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
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* Returns: -1 if this call withdrew the machine,
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* 0 if it was already withdrawn
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*/
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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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{
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int rv;
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rv = gfs2_lm_withdraw(sdp,
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"GFS2: fsid=%s: fatal: I/O error\n"
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"GFS2: fsid=%s: block = %llu\n"
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"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
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sdp->sd_fsname,
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sdp->sd_fsname, (uint64_t)bh->b_blocknr,
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sdp->sd_fsname, function, file, line);
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return rv;
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}
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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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{
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unsigned int c, o, b = bit;
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int old_value;
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c = b / (8 * PAGE_SIZE);
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b %= 8 * PAGE_SIZE;
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o = b / 8;
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b %= 8;
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old_value = (bitmap[c][o] & (1 << b));
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gfs2_assert_withdraw(sdp, !old_value != !new_value);
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if (new_value)
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bitmap[c][o] |= 1 << b;
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else
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bitmap[c][o] &= ~(1 << b);
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}
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