[net-next-2.6.git] / fs / gfs2 / util.c

/*
 * 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/sched.h>
#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 <asm/uaccess.h>

#include "gfs2.h"
#include "lm_interface.h"
#include "incore.h"
#include "glock.h"
#include "lm.h"
#include "util.h"

kmem_cache_t *gfs2_glock_cachep __read_mostly;
kmem_cache_t *gfs2_inode_cachep __read_mostly;
kmem_cache_t *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 *          -2 if it was already withdrawn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 *          0 if it was already withdrawn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_num.no_formal_ino,
		(unsigned long long)ip->i_num.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_ri.ri_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,
			   uint16_t type, uint16_t 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);
}
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#include <linux/sched.h>
	11	#include <linux/slab.h>
	12	#include <linux/spinlock.h>
	13	#include <linux/completion.h>
	14	#include <linux/buffer_head.h>
	15	#include <linux/crc32.h>
5c676f6d	16	#include <linux/gfs2_ondisk.h>
b3b94faa DT	17	#include <asm/uaccess.h>
	18
	19	#include "gfs2.h"
5c676f6d SW	20	#include "lm_interface.h"
5c676f6d SW	21	#include "incore.h"
b3b94faa DT	22	#include "glock.h"
b3b94faa DT	23	#include "lm.h"
5c676f6d	24	#include "util.h"
b3b94faa DT	25
	26	kmem_cache_t *gfs2_glock_cachep __read_mostly;
	27	kmem_cache_t *gfs2_inode_cachep __read_mostly;
	28	kmem_cache_t *gfs2_bufdata_cachep __read_mostly;
	29
b3b94faa DT	30	void gfs2_assert_i(struct gfs2_sbd *sdp)
	31	{
	32	printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
	33	sdp->sd_fsname);
	34	}
	35
	36	/**
	37	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	38	* Returns: -1 if this call withdrew the machine,
	39	* -2 if it was already withdrawn
	40	*/
	41
	42	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	43	const char function, char file, unsigned int line)
	44	{
	45	int me;
	46	me = gfs2_lm_withdraw(sdp,
	47	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	48	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	49	sdp->sd_fsname, assertion,
	50	sdp->sd_fsname, function, file, line);
18ec7d5c	51	dump_stack();
b3b94faa DT	52	return (me) ? -1 : -2;
	53	}
	54
	55	/**
	56	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	57	* Returns: -1 if we printed something
	58	* -2 if we didn't
	59	*/
	60
	61	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	62	const char function, char file, unsigned int line)
	63	{
	64	if (time_before(jiffies,
	65	sdp->sd_last_warning +
	66	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	67	return -2;
	68
	69	printk(KERN_WARNING
	70	"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	71	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	72	sdp->sd_fsname, assertion,
	73	sdp->sd_fsname, function, file, line);
	74
	75	if (sdp->sd_args.ar_debug)
	76	BUG();
18ec7d5c SW	77	else
18ec7d5c SW	78	dump_stack();
b3b94faa DT	79
	80	sdp->sd_last_warning = jiffies;
	81
	82	return -1;
	83	}
	84
	85	/**
	86	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	87	* Returns: -1 if this call withdrew the machine,
	88	* 0 if it was already withdrawn
	89	*/
	90
	91	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	92	char *file, unsigned int line)
	93	{
	94	int rv;
	95	rv = gfs2_lm_withdraw(sdp,
	96	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	97	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	98	sdp->sd_fsname,
	99	sdp->sd_fsname, function, file, line);
	100	return rv;
	101	}
	102
	103	/**
	104	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	105	* Returns: -1 if this call withdrew the machine,
	106	* 0 if it was already withdrawn
	107	*/
	108
	109	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	110	const char function, char file, unsigned int line)
	111	{
feaa7bba	112	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	113	int rv;
	114	rv = gfs2_lm_withdraw(sdp,
	115	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	116	"GFS2: fsid=%s: inode = %llu %llu\n"
	117	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	118	sdp->sd_fsname,
382066da SW	119	sdp->sd_fsname, (unsigned long long)ip->i_num.no_formal_ino,
382066da SW	120	(unsigned long long)ip->i_num.no_addr,
b3b94faa DT	121	sdp->sd_fsname, function, file, line);
	122	return rv;
	123	}
	124
	125	/**
	126	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	127	* Returns: -1 if this call withdrew the machine,
	128	* 0 if it was already withdrawn
	129	*/
	130
	131	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	132	const char function, char file, unsigned int line)
	133	{
	134	struct gfs2_sbd *sdp = rgd->rd_sbd;
	135	int rv;
	136	rv = gfs2_lm_withdraw(sdp,
	137	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	138	"GFS2: fsid=%s: RG = %llu\n"
	139	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	140	sdp->sd_fsname,
382066da	141	sdp->sd_fsname, (unsigned long long)rgd->rd_ri.ri_addr,
b3b94faa DT	142	sdp->sd_fsname, function, file, line);
	143	return rv;
	144	}
	145
	146	/**
	147	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	148	* Returns: -1 if this call withdrew the machine,
	149	* -2 if it was already withdrawn
	150	*/
	151
	152	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	153	const char type, const char function, char *file,
	154	unsigned int line)
	155	{
	156	int me;
	157	me = gfs2_lm_withdraw(sdp,
	158	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	159	"GFS2: fsid=%s: bh = %llu (%s)\n"
	160	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	161	sdp->sd_fsname,
382066da	162	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
b3b94faa DT	163	sdp->sd_fsname, function, file, line);
	164	return (me) ? -1 : -2;
	165	}
	166
	167	/**
	168	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	169	* Returns: -1 if this call withdrew the machine,
	170	* -2 if it was already withdrawn
	171	*/
	172
	173	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	174	uint16_t type, uint16_t t, const char *function,
	175	char *file, unsigned int line)
	176	{
	177	int me;
	178	me = gfs2_lm_withdraw(sdp,
	179	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	180	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	181	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	182	sdp->sd_fsname,
382066da	183	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	184	sdp->sd_fsname, function, file, line);
	185	return (me) ? -1 : -2;
	186	}
	187
	188	/**
	189	* gfs2_io_error_i - Flag an I/O error and withdraw
	190	* Returns: -1 if this call withdrew the machine,
	191	* 0 if it was already withdrawn
	192	*/
	193
	194	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	195	unsigned int line)
	196	{
	197	int rv;
	198	rv = gfs2_lm_withdraw(sdp,
	199	"GFS2: fsid=%s: fatal: I/O error\n"
	200	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	201	sdp->sd_fsname,
	202	sdp->sd_fsname, function, file, line);
	203	return rv;
	204	}
	205
	206	/**
	207	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	208	* Returns: -1 if this call withdrew the machine,
	209	* 0 if it was already withdrawn
	210	*/
	211
	212	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	213	const char function, char file, unsigned int line)
	214	{
	215	int rv;
	216	rv = gfs2_lm_withdraw(sdp,
	217	"GFS2: fsid=%s: fatal: I/O error\n"
	218	"GFS2: fsid=%s: block = %llu\n"
	219	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	220	sdp->sd_fsname,
382066da	221	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	222	sdp->sd_fsname, function, file, line);
	223	return rv;
	224	}
	225
b3b94faa DT	226	void gfs2_icbit_munge(struct gfs2_sbd sdp, unsigned char *bitmap,
	227	unsigned int bit, int new_value)
	228	{
	229	unsigned int c, o, b = bit;
	230	int old_value;
	231
	232	c = b / (8 * PAGE_SIZE);
	233	b %= 8 * PAGE_SIZE;
	234	o = b / 8;
	235	b %= 8;
	236
	237	old_value = (bitmap[c][o] & (1 << b));
	238	gfs2_assert_withdraw(sdp, !old_value != !new_value);
	239
	240	if (new_value)
	241	bitmap[c][o] \|= 1 << b;
	242	else
	243	bitmap[c][o] &= ~(1 << b);
	244	}
	245