[GitHub/mt8127/android_kernel_alcatel_ttab.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 <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_glock_aspace_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, ...)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	const struct lm_lockops *lm = ls->ls_ops;
	va_list args;

	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
	    test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
		return 0;

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

	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
		fs_err(sdp, "about to withdraw this file system\n");
		BUG_ON(sdp->sd_args.ar_debug);

		kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);

		if (lm->lm_unmount) {
			fs_err(sdp, "telling LM to unmount\n");
			lm->lm_unmount(sdp);
		}
		fs_err(sdp, "withdrawn\n");
		dump_stack();
	}

	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
		panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);

	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 *          -2 if it was already withdrawn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;

	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
		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();

	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
		panic("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);

	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>
b3b94faa DT	16	#include <asm/uaccess.h>
	17
	18	#include "gfs2.h"
5c676f6d	19	#include "incore.h"
b3b94faa	20	#include "glock.h"
5c676f6d	21	#include "util.h"
b3b94faa	22
e18b890b	23	struct kmem_cache *gfs2_glock_cachep __read_mostly;
009d8518	24	struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
e18b890b CL	25	struct kmem_cache *gfs2_inode_cachep __read_mostly;
e18b890b CL	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, ...)
da755fdb SW	37	{
f057f6cd SW	38	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
f057f6cd SW	39	const struct lm_lockops *lm = ls->ls_ops;
da755fdb SW	40	va_list args;
da755fdb SW	41
d34843d0 BP	42	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
d34843d0 BP	43	test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
da755fdb SW	44	return 0;
	45
	46	va_start(args, fmt);
	47	vprintk(fmt, args);
	48	va_end(args);
	49
d34843d0 BP	50	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
	51	fs_err(sdp, "about to withdraw this file system\n");
	52	BUG_ON(sdp->sd_args.ar_debug);
da755fdb	53
d34843d0	54	kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
f057f6cd	55
d34843d0 BP	56	if (lm->lm_unmount) {
	57	fs_err(sdp, "telling LM to unmount\n");
	58	lm->lm_unmount(sdp);
	59	}
	60	fs_err(sdp, "withdrawn\n");
	61	dump_stack();
f057f6cd	62	}
d34843d0 BP	63
	64	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	65	panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
da755fdb SW	66
	67	return -1;
	68	}
	69
b3b94faa DT	70	/**
	71	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	72	* Returns: -1 if this call withdrew the machine,
	73	* -2 if it was already withdrawn
	74	*/
	75
	76	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	77	const char function, char file, unsigned int line)
	78	{
	79	int me;
	80	me = gfs2_lm_withdraw(sdp,
	81	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	82	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	83	sdp->sd_fsname, assertion,
	84	sdp->sd_fsname, function, file, line);
18ec7d5c	85	dump_stack();
b3b94faa DT	86	return (me) ? -1 : -2;
	87	}
	88
	89	/**
	90	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	91	* Returns: -1 if we printed something
	92	* -2 if we didn't
	93	*/
	94
	95	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	96	const char function, char file, unsigned int line)
	97	{
	98	if (time_before(jiffies,
	99	sdp->sd_last_warning +
	100	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	101	return -2;
	102
d34843d0 BP	103	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
	104	printk(KERN_WARNING
	105	"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	106	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	107	sdp->sd_fsname, assertion,
	108	sdp->sd_fsname, function, file, line);
b3b94faa DT	109
	110	if (sdp->sd_args.ar_debug)
	111	BUG();
18ec7d5c SW	112	else
18ec7d5c SW	113	dump_stack();
b3b94faa	114
d34843d0 BP	115	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	116	panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	117	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	118	sdp->sd_fsname, assertion,
	119	sdp->sd_fsname, function, file, line);
	120
b3b94faa DT	121	sdp->sd_last_warning = jiffies;
	122
	123	return -1;
	124	}
	125
	126	/**
	127	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	128	* Returns: -1 if this call withdrew the machine,
	129	* 0 if it was already withdrawn
	130	*/
	131
	132	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	133	char *file, unsigned int line)
	134	{
	135	int rv;
	136	rv = gfs2_lm_withdraw(sdp,
	137	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	138	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	139	sdp->sd_fsname,
	140	sdp->sd_fsname, function, file, line);
	141	return rv;
	142	}
	143
	144	/**
	145	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	146	* Returns: -1 if this call withdrew the machine,
	147	* 0 if it was already withdrawn
	148	*/
	149
	150	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	151	const char function, char file, unsigned int line)
	152	{
feaa7bba	153	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	154	int rv;
	155	rv = gfs2_lm_withdraw(sdp,
	156	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	157	"GFS2: fsid=%s: inode = %llu %llu\n"
	158	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	159	sdp->sd_fsname,
dbb7cae2 SW	160	sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
dbb7cae2 SW	161	(unsigned long long)ip->i_no_addr,
b3b94faa DT	162	sdp->sd_fsname, function, file, line);
	163	return rv;
	164	}
	165
	166	/**
	167	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	168	* Returns: -1 if this call withdrew the machine,
	169	* 0 if it was already withdrawn
	170	*/
	171
	172	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	173	const char function, char file, unsigned int line)
	174	{
	175	struct gfs2_sbd *sdp = rgd->rd_sbd;
	176	int rv;
	177	rv = gfs2_lm_withdraw(sdp,
	178	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	179	"GFS2: fsid=%s: RG = %llu\n"
	180	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	181	sdp->sd_fsname,
bb8d8a6f	182	sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
b3b94faa DT	183	sdp->sd_fsname, function, file, line);
	184	return rv;
	185	}
	186
	187	/**
	188	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	189	* Returns: -1 if this call withdrew the machine,
	190	* -2 if it was already withdrawn
	191	*/
	192
	193	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	194	const char type, const char function, char *file,
	195	unsigned int line)
	196	{
	197	int me;
	198	me = gfs2_lm_withdraw(sdp,
	199	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	200	"GFS2: fsid=%s: bh = %llu (%s)\n"
	201	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	202	sdp->sd_fsname,
382066da	203	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
b3b94faa DT	204	sdp->sd_fsname, function, file, line);
	205	return (me) ? -1 : -2;
	206	}
	207
	208	/**
	209	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	210	* Returns: -1 if this call withdrew the machine,
	211	* -2 if it was already withdrawn
	212	*/
	213
	214	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	215	u16 type, u16 t, const char *function,
b3b94faa DT	216	char *file, unsigned int line)
	217	{
	218	int me;
	219	me = gfs2_lm_withdraw(sdp,
	220	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	221	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	222	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	223	sdp->sd_fsname,
382066da	224	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	225	sdp->sd_fsname, function, file, line);
	226	return (me) ? -1 : -2;
	227	}
	228
	229	/**
	230	* gfs2_io_error_i - Flag an I/O error and withdraw
	231	* Returns: -1 if this call withdrew the machine,
	232	* 0 if it was already withdrawn
	233	*/
	234
	235	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	236	unsigned int line)
	237	{
	238	int rv;
	239	rv = gfs2_lm_withdraw(sdp,
	240	"GFS2: fsid=%s: fatal: I/O error\n"
	241	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	242	sdp->sd_fsname,
	243	sdp->sd_fsname, function, file, line);
	244	return rv;
	245	}
	246
	247	/**
	248	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	249	* Returns: -1 if this call withdrew the machine,
	250	* 0 if it was already withdrawn
	251	*/
	252
	253	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	254	const char function, char file, unsigned int line)
	255	{
	256	int rv;
	257	rv = gfs2_lm_withdraw(sdp,
	258	"GFS2: fsid=%s: fatal: I/O error\n"
	259	"GFS2: fsid=%s: block = %llu\n"
	260	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	261	sdp->sd_fsname,
382066da	262	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	263	sdp->sd_fsname, function, file, line);
	264	return rv;
	265	}
	266
b3b94faa DT	267	void gfs2_icbit_munge(struct gfs2_sbd sdp, unsigned char *bitmap,
	268	unsigned int bit, int new_value)
	269	{
	270	unsigned int c, o, b = bit;
	271	int old_value;
	272
	273	c = b / (8 * PAGE_SIZE);
	274	b %= 8 * PAGE_SIZE;
	275	o = b / 8;
	276	b %= 8;
	277
	278	old_value = (bitmap[c][o] & (1 << b));
	279	gfs2_assert_withdraw(sdp, !old_value != !new_value);
	280
	281	if (new_value)
	282	bitmap[c][o] \|= 1 << b;
	283	else
	284	bitmap[c][o] &= ~(1 << b);
	285	}
	286