[linux-2.6-block.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 "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;
struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
struct kmem_cache *gfs2_quotad_cachep __read_mostly;

void gfs2_assert_i(struct gfs2_sbd *sdp)
{
	printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
	       sdp->sd_fsname);
}

int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
{
	va_list args;

	if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
		return 0;

	va_start(args, fmt);
	vprintk(fmt, args);
	va_end(args);

	fs_err(sdp, "about to withdraw this file system\n");
	BUG_ON(sdp->sd_args.ar_debug);

	fs_err(sdp, "telling LM to withdraw\n");
	gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
	fs_err(sdp, "withdrawn\n");
	dump_stack();

	return -1;
}

/**
 * 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 *          -2 if it was already withdrawn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);
}
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	21	#include "glock.h"
5c676f6d	22	#include "util.h"
b3b94faa	23
e18b890b CL	24	struct kmem_cache *gfs2_glock_cachep __read_mostly;
	25	struct kmem_cache *gfs2_inode_cachep __read_mostly;
	26	struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
6bdd9be6	27	struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
37b2c837	28	struct kmem_cache *gfs2_quotad_cachep __read_mostly;
b3b94faa	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
da755fdb SW	36	int gfs2_lm_withdraw(struct gfs2_sbd sdp, char fmt, ...)
	37	{
	38	va_list args;
	39
	40	if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
	41	return 0;
	42
	43	va_start(args, fmt);
	44	vprintk(fmt, args);
	45	va_end(args);
	46
	47	fs_err(sdp, "about to withdraw this file system\n");
	48	BUG_ON(sdp->sd_args.ar_debug);
	49
	50	fs_err(sdp, "telling LM to withdraw\n");
	51	gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
	52	fs_err(sdp, "withdrawn\n");
	53	dump_stack();
	54
	55	return -1;
	56	}
	57
b3b94faa DT	58	/**
	59	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	60	* Returns: -1 if this call withdrew the machine,
	61	* -2 if it was already withdrawn
	62	*/
	63
	64	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	65	const char function, char file, unsigned int line)
	66	{
	67	int me;
	68	me = gfs2_lm_withdraw(sdp,
	69	"GFS2: fsid=%s: fatal: 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);
18ec7d5c	73	dump_stack();
b3b94faa DT	74	return (me) ? -1 : -2;
	75	}
	76
	77	/**
	78	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	79	* Returns: -1 if we printed something
	80	* -2 if we didn't
	81	*/
	82
	83	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	84	const char function, char file, unsigned int line)
	85	{
	86	if (time_before(jiffies,
	87	sdp->sd_last_warning +
	88	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	89	return -2;
	90
	91	printk(KERN_WARNING
	92	"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	93	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	94	sdp->sd_fsname, assertion,
	95	sdp->sd_fsname, function, file, line);
	96
	97	if (sdp->sd_args.ar_debug)
	98	BUG();
18ec7d5c SW	99	else
18ec7d5c SW	100	dump_stack();
b3b94faa DT	101
	102	sdp->sd_last_warning = jiffies;
	103
	104	return -1;
	105	}
	106
	107	/**
	108	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	109	* Returns: -1 if this call withdrew the machine,
	110	* 0 if it was already withdrawn
	111	*/
	112
	113	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	114	char *file, unsigned int line)
	115	{
	116	int rv;
	117	rv = gfs2_lm_withdraw(sdp,
	118	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	119	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	120	sdp->sd_fsname,
	121	sdp->sd_fsname, function, file, line);
	122	return rv;
	123	}
	124
	125	/**
	126	* gfs2_consist_inode_i - Flag an inode 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_inode_i(struct gfs2_inode *ip, int cluster_wide,
	132	const char function, char file, unsigned int line)
	133	{
feaa7bba	134	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	135	int rv;
	136	rv = gfs2_lm_withdraw(sdp,
	137	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	138	"GFS2: fsid=%s: inode = %llu %llu\n"
	139	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	140	sdp->sd_fsname,
dbb7cae2 SW	141	sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
dbb7cae2 SW	142	(unsigned long long)ip->i_no_addr,
b3b94faa DT	143	sdp->sd_fsname, function, file, line);
	144	return rv;
	145	}
	146
	147	/**
	148	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	149	* Returns: -1 if this call withdrew the machine,
	150	* 0 if it was already withdrawn
	151	*/
	152
	153	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	154	const char function, char file, unsigned int line)
	155	{
	156	struct gfs2_sbd *sdp = rgd->rd_sbd;
	157	int rv;
	158	rv = gfs2_lm_withdraw(sdp,
	159	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	160	"GFS2: fsid=%s: RG = %llu\n"
	161	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	162	sdp->sd_fsname,
bb8d8a6f	163	sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
b3b94faa DT	164	sdp->sd_fsname, function, file, line);
	165	return rv;
	166	}
	167
	168	/**
	169	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	170	* Returns: -1 if this call withdrew the machine,
	171	* -2 if it was already withdrawn
	172	*/
	173
	174	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	175	const char type, const char function, char *file,
	176	unsigned int line)
	177	{
	178	int me;
	179	me = gfs2_lm_withdraw(sdp,
	180	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	181	"GFS2: fsid=%s: bh = %llu (%s)\n"
	182	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	183	sdp->sd_fsname,
382066da	184	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
b3b94faa DT	185	sdp->sd_fsname, function, file, line);
	186	return (me) ? -1 : -2;
	187	}
	188
	189	/**
	190	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	191	* Returns: -1 if this call withdrew the machine,
	192	* -2 if it was already withdrawn
	193	*/
	194
	195	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	196	u16 type, u16 t, const char *function,
b3b94faa DT	197	char *file, unsigned int line)
	198	{
	199	int me;
	200	me = gfs2_lm_withdraw(sdp,
	201	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	202	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	203	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	204	sdp->sd_fsname,
382066da	205	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	206	sdp->sd_fsname, function, file, line);
	207	return (me) ? -1 : -2;
	208	}
	209
	210	/**
	211	* gfs2_io_error_i - Flag an I/O error and withdraw
	212	* Returns: -1 if this call withdrew the machine,
	213	* 0 if it was already withdrawn
	214	*/
	215
	216	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	217	unsigned int line)
	218	{
	219	int rv;
	220	rv = gfs2_lm_withdraw(sdp,
	221	"GFS2: fsid=%s: fatal: I/O error\n"
	222	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	223	sdp->sd_fsname,
	224	sdp->sd_fsname, function, file, line);
	225	return rv;
	226	}
	227
	228	/**
	229	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	230	* Returns: -1 if this call withdrew the machine,
	231	* 0 if it was already withdrawn
	232	*/
	233
	234	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	235	const char function, char file, unsigned int line)
	236	{
	237	int rv;
	238	rv = gfs2_lm_withdraw(sdp,
	239	"GFS2: fsid=%s: fatal: I/O error\n"
	240	"GFS2: fsid=%s: block = %llu\n"
	241	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	242	sdp->sd_fsname,
382066da	243	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	244	sdp->sd_fsname, function, file, line);
	245	return rv;
	246	}
	247
b3b94faa DT	248	void gfs2_icbit_munge(struct gfs2_sbd sdp, unsigned char *bitmap,
	249	unsigned int bit, int new_value)
	250	{
	251	unsigned int c, o, b = bit;
	252	int old_value;
	253
	254	c = b / (8 * PAGE_SIZE);
	255	b %= 8 * PAGE_SIZE;
	256	o = b / 8;
	257	b %= 8;
	258
	259	old_value = (bitmap[c][o] & (1 << b));
	260	gfs2_assert_withdraw(sdp, !old_value != !new_value);
	261
	262	if (new_value)
	263	bitmap[c][o] \|= 1 << b;
	264	else
	265	bitmap[c][o] &= ~(1 << b);
	266	}
	267