[deliverable/linux.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/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 *          -2 if it was already withdrawn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 *          0 if it was already withdrawn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_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,
			   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);
}
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	*/
b3b94faa DT	9
b3b94faa DT	10	#include <linux/slab.h>
	11	#include <linux/spinlock.h>
	12	#include <linux/completion.h>
	13	#include <linux/buffer_head.h>
	14	#include <linux/crc32.h>
5c676f6d	15	#include <linux/gfs2_ondisk.h>
7d308590	16	#include <linux/lm_interface.h>
b3b94faa DT	17	#include <asm/uaccess.h>
	18
	19	#include "gfs2.h"
5c676f6d	20	#include "incore.h"
b3b94faa DT	21	#include "glock.h"
b3b94faa DT	22	#include "lm.h"
5c676f6d	23	#include "util.h"
b3b94faa	24
e18b890b CL	25	struct kmem_cache *gfs2_glock_cachep __read_mostly;
	26	struct kmem_cache *gfs2_inode_cachep __read_mostly;
	27	struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
b3b94faa	28
b3b94faa DT	29	void gfs2_assert_i(struct gfs2_sbd *sdp)
	30	{
	31	printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
	32	sdp->sd_fsname);
	33	}
	34
	35	/**
	36	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	37	* Returns: -1 if this call withdrew the machine,
	38	* -2 if it was already withdrawn
	39	*/
	40
	41	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	42	const char function, char file, unsigned int line)
	43	{
	44	int me;
	45	me = gfs2_lm_withdraw(sdp,
	46	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	47	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	48	sdp->sd_fsname, assertion,
	49	sdp->sd_fsname, function, file, line);
18ec7d5c	50	dump_stack();
b3b94faa DT	51	return (me) ? -1 : -2;
	52	}
	53
	54	/**
	55	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	56	* Returns: -1 if we printed something
	57	* -2 if we didn't
	58	*/
	59
	60	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	61	const char function, char file, unsigned int line)
	62	{
	63	if (time_before(jiffies,
	64	sdp->sd_last_warning +
	65	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	66	return -2;
	67
	68	printk(KERN_WARNING
	69	"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	70	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	71	sdp->sd_fsname, assertion,
	72	sdp->sd_fsname, function, file, line);
	73
	74	if (sdp->sd_args.ar_debug)
	75	BUG();
18ec7d5c SW	76	else
18ec7d5c SW	77	dump_stack();
b3b94faa DT	78
	79	sdp->sd_last_warning = jiffies;
	80
	81	return -1;
	82	}
	83
	84	/**
	85	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	86	* Returns: -1 if this call withdrew the machine,
	87	* 0 if it was already withdrawn
	88	*/
	89
	90	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	91	char *file, unsigned int line)
	92	{
	93	int rv;
	94	rv = gfs2_lm_withdraw(sdp,
	95	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	96	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	97	sdp->sd_fsname,
	98	sdp->sd_fsname, function, file, line);
	99	return rv;
	100	}
	101
	102	/**
	103	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	104	* Returns: -1 if this call withdrew the machine,
	105	* 0 if it was already withdrawn
	106	*/
	107
	108	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	109	const char function, char file, unsigned int line)
	110	{
feaa7bba	111	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	112	int rv;
	113	rv = gfs2_lm_withdraw(sdp,
	114	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	115	"GFS2: fsid=%s: inode = %llu %llu\n"
	116	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	117	sdp->sd_fsname,
382066da SW	118	sdp->sd_fsname, (unsigned long long)ip->i_num.no_formal_ino,
382066da SW	119	(unsigned long long)ip->i_num.no_addr,
b3b94faa DT	120	sdp->sd_fsname, function, file, line);
	121	return rv;
	122	}
	123
	124	/**
	125	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	126	* Returns: -1 if this call withdrew the machine,
	127	* 0 if it was already withdrawn
	128	*/
	129
	130	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	131	const char function, char file, unsigned int line)
	132	{
	133	struct gfs2_sbd *sdp = rgd->rd_sbd;
	134	int rv;
	135	rv = gfs2_lm_withdraw(sdp,
	136	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	137	"GFS2: fsid=%s: RG = %llu\n"
	138	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	139	sdp->sd_fsname,
382066da	140	sdp->sd_fsname, (unsigned long long)rgd->rd_ri.ri_addr,
b3b94faa DT	141	sdp->sd_fsname, function, file, line);
	142	return rv;
	143	}
	144
	145	/**
	146	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	147	* Returns: -1 if this call withdrew the machine,
	148	* -2 if it was already withdrawn
	149	*/
	150
	151	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	152	const char type, const char function, char *file,
	153	unsigned int line)
	154	{
	155	int me;
	156	me = gfs2_lm_withdraw(sdp,
	157	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	158	"GFS2: fsid=%s: bh = %llu (%s)\n"
	159	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	160	sdp->sd_fsname,
382066da	161	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
b3b94faa DT	162	sdp->sd_fsname, function, file, line);
	163	return (me) ? -1 : -2;
	164	}
	165
	166	/**
	167	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	168	* Returns: -1 if this call withdrew the machine,
	169	* -2 if it was already withdrawn
	170	*/
	171
	172	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	173	u16 type, u16 t, const char *function,
b3b94faa DT	174	char *file, unsigned int line)
	175	{
	176	int me;
	177	me = gfs2_lm_withdraw(sdp,
	178	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	179	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	180	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	181	sdp->sd_fsname,
382066da	182	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	183	sdp->sd_fsname, function, file, line);
	184	return (me) ? -1 : -2;
	185	}
	186
	187	/**
	188	* gfs2_io_error_i - Flag an I/O error and withdraw
	189	* Returns: -1 if this call withdrew the machine,
	190	* 0 if it was already withdrawn
	191	*/
	192
	193	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	194	unsigned int line)
	195	{
	196	int rv;
	197	rv = gfs2_lm_withdraw(sdp,
	198	"GFS2: fsid=%s: fatal: I/O error\n"
	199	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	200	sdp->sd_fsname,
	201	sdp->sd_fsname, function, file, line);
	202	return rv;
	203	}
	204
	205	/**
	206	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	207	* Returns: -1 if this call withdrew the machine,
	208	* 0 if it was already withdrawn
	209	*/
	210
	211	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	212	const char function, char file, unsigned int line)
	213	{
	214	int rv;
	215	rv = gfs2_lm_withdraw(sdp,
	216	"GFS2: fsid=%s: fatal: I/O error\n"
	217	"GFS2: fsid=%s: block = %llu\n"
	218	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	219	sdp->sd_fsname,
382066da	220	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	221	sdp->sd_fsname, function, file, line);
	222	return rv;
	223	}
	224
b3b94faa DT	225	void gfs2_icbit_munge(struct gfs2_sbd sdp, unsigned char *bitmap,
	226	unsigned int bit, int new_value)
	227	{
	228	unsigned int c, o, b = bit;
	229	int old_value;
	230
	231	c = b / (8 * PAGE_SIZE);
	232	b %= 8 * PAGE_SIZE;
	233	o = b / 8;
	234	b %= 8;
	235
	236	old_value = (bitmap[c][o] & (1 << b));
	237	gfs2_assert_withdraw(sdp, !old_value != !new_value);
	238
	239	if (new_value)
	240	bitmap[c][o] \|= 1 << b;
	241	else
	242	bitmap[c][o] &= ~(1 << b);
	243	}
	244