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/*

 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.

 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.

 *

 * This copyrighted material is made available to anyone wishing to use,

 * modify, copy, or redistribute it subject to the terms and conditions

 * of the GNU General Public License version 2.

 */

#include <linux/slab.h>

#include <linux/spinlock.h>

#include <linux/completion.h>

#include <linux/buffer_head.h>

#include <linux/crc32.h>

#include <linux/gfs2_ondisk.h>

#include <linux/lm_interface.h>

#include <asm/uaccess.h>

#include "gfs2.h"

#include "incore.h"

#include "glock.h"

#include "lm.h"

#include "util.h"

struct kmem_cache *gfs2_glock_cachep __read_mostly;

struct kmem_cache *gfs2_inode_cachep __read_mostly;

struct kmem_cache *gfs2_bufdata_cachep __read_mostly;

void gfs2_assert_i(struct gfs2_sbd *sdp)

{

        printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",

               sdp->sd_fsname);

}

/**

 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false

 * Returns: -1 if this call withdrew the machine,

 *          -2 if it was already withdrawn

 */

int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,

                           const char *function, char *file, unsigned int line)

{

        int me;

        me = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname, assertion,

                sdp->sd_fsname, function, file, line);

        dump_stack();

        return (me) ? -1 : -2;

}

/**

 * gfs2_assert_warn_i - Print a message to the console if @assertion is false

 * Returns: -1 if we printed something

 *          -2 if we didn't

 */

int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,

                       const char *function, char *file, unsigned int line)

{

        if (time_before(jiffies,

                        sdp->sd_last_warning +

                        gfs2_tune_get(sdp, gt_complain_secs) * HZ))

                return -2;

        printk(KERN_WARNING

               "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"

               "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

               sdp->sd_fsname, assertion,

               sdp->sd_fsname, function, file, line);

        if (sdp->sd_args.ar_debug)

                BUG();

        else

                dump_stack();

        sdp->sd_last_warning = jiffies;

        return -1;

}

/**

 * gfs2_consist_i - Flag a filesystem consistency error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          0 if it was already withdrawn

 */

int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,

                   char *file, unsigned int line)

{

        int rv;

        rv = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: filesystem consistency error\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, function, file, line);

        return rv;

}

/**

 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          0 if it was already withdrawn

 */

int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,

                         const char *function, char *file, unsigned int line)

{

        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

        int rv;

        rv = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: filesystem consistency error\n"

                "GFS2: fsid=%s:   inode = %llu %llu\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,

                (unsigned long long)ip->i_no_addr,

                sdp->sd_fsname, function, file, line);

        return rv;

}

/**

 * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          0 if it was already withdrawn

 */

int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,

                         const char *function, char *file, unsigned int line)

{

        struct gfs2_sbd *sdp = rgd->rd_sbd;

        int rv;

        rv = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: filesystem consistency error\n"

                "GFS2: fsid=%s:   RG = %llu\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, (unsigned long long)rgd->rd_addr,

                sdp->sd_fsname, function, file, line);

        return rv;

}

/**

 * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          -2 if it was already withdrawn

 */

int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,

                       const char *type, const char *function, char *file,

                       unsigned int line)

{

        int me;

        me = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: invalid metadata block\n"

                "GFS2: fsid=%s:   bh = %llu (%s)\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,

                sdp->sd_fsname, function, file, line);

        return (me) ? -1 : -2;

}

/**

 * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          -2 if it was already withdrawn

 */

int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,

                           u16 type, u16 t, const char *function,

                           char *file, unsigned int line)

{

        int me;

        me = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: invalid metadata block\n"

                "GFS2: fsid=%s:   bh = %llu (type: exp=%u, found=%u)\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,

                sdp->sd_fsname, function, file, line);

        return (me) ? -1 : -2;

}

/**

 * gfs2_io_error_i - Flag an I/O error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          0 if it was already withdrawn

 */

int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,

                    unsigned int line)

{

        int rv;

        rv = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: I/O error\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, function, file, line);

        return rv;

}

/**

 * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw

 * Returns: -1 if this call withdrew the machine,

 *          0 if it was already withdrawn

 */

int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,

                       const char *function, char *file, unsigned int line)

{

        int rv;

        rv = gfs2_lm_withdraw(sdp,

                "GFS2: fsid=%s: fatal: I/O error\n"

                "GFS2: fsid=%s:   block = %llu\n"

                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",

                sdp->sd_fsname,

                sdp->sd_fsname, (unsigned long long)bh->b_blocknr,

                sdp->sd_fsname, function, file, line);

        return rv;

}

void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,

                      unsigned int bit, int new_value)

{

        unsigned int c, o, b = bit;

        int old_value;

        c = b / (8 * PAGE_SIZE);

        b %= 8 * PAGE_SIZE;

        o = b / 8;

        b %= 8;

        old_value = (bitmap[c][o] & (1 << b));

        gfs2_assert_withdraw(sdp, !old_value != !new_value);

        if (new_value)

                bitmap[c][o] |= 1 << b;

        else

                bitmap[c][o] &= ~(1 << b);

}