[mirror_ubuntu-bionic-kernel.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;

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	fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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;
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
da755fdb SW	35	int gfs2_lm_withdraw(struct gfs2_sbd sdp, char fmt, ...)
	36	{
	37	va_list args;
	38
	39	if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
	40	return 0;
	41
	42	va_start(args, fmt);
	43	vprintk(fmt, args);
	44	va_end(args);
	45
	46	fs_err(sdp, "about to withdraw this file system\n");
	47	BUG_ON(sdp->sd_args.ar_debug);
	48
	49	fs_err(sdp, "telling LM to withdraw\n");
	50	gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
	51	fs_err(sdp, "withdrawn\n");
	52	dump_stack();
	53
	54	return -1;
	55	}
	56
b3b94faa DT	57	/**
	58	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	59	* Returns: -1 if this call withdrew the machine,
	60	* -2 if it was already withdrawn
	61	*/
	62
	63	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	64	const char function, char file, unsigned int line)
	65	{
	66	int me;
	67	me = gfs2_lm_withdraw(sdp,
	68	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	69	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	70	sdp->sd_fsname, assertion,
	71	sdp->sd_fsname, function, file, line);
18ec7d5c	72	dump_stack();
b3b94faa DT	73	return (me) ? -1 : -2;
	74	}
	75
	76	/**
	77	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	78	* Returns: -1 if we printed something
	79	* -2 if we didn't
	80	*/
	81
	82	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	83	const char function, char file, unsigned int line)
	84	{
	85	if (time_before(jiffies,
	86	sdp->sd_last_warning +
	87	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	88	return -2;
	89
	90	printk(KERN_WARNING
	91	"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	92	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	93	sdp->sd_fsname, assertion,
	94	sdp->sd_fsname, function, file, line);
	95
	96	if (sdp->sd_args.ar_debug)
	97	BUG();
18ec7d5c SW	98	else
18ec7d5c SW	99	dump_stack();
b3b94faa DT	100
	101	sdp->sd_last_warning = jiffies;
	102
	103	return -1;
	104	}
	105
	106	/**
	107	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	108	* Returns: -1 if this call withdrew the machine,
	109	* 0 if it was already withdrawn
	110	*/
	111
	112	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	113	char *file, unsigned int line)
	114	{
	115	int rv;
	116	rv = gfs2_lm_withdraw(sdp,
	117	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	118	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	119	sdp->sd_fsname,
	120	sdp->sd_fsname, function, file, line);
	121	return rv;
	122	}
	123
	124	/**
	125	* gfs2_consist_inode_i - Flag an inode 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_inode_i(struct gfs2_inode *ip, int cluster_wide,
	131	const char function, char file, unsigned int line)
	132	{
feaa7bba	133	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	134	int rv;
	135	rv = gfs2_lm_withdraw(sdp,
	136	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	137	"GFS2: fsid=%s: inode = %llu %llu\n"
	138	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	139	sdp->sd_fsname,
dbb7cae2 SW	140	sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
dbb7cae2 SW	141	(unsigned long long)ip->i_no_addr,
b3b94faa DT	142	sdp->sd_fsname, function, file, line);
	143	return rv;
	144	}
	145
	146	/**
	147	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	148	* Returns: -1 if this call withdrew the machine,
	149	* 0 if it was already withdrawn
	150	*/
	151
	152	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	153	const char function, char file, unsigned int line)
	154	{
	155	struct gfs2_sbd *sdp = rgd->rd_sbd;
	156	int rv;
	157	rv = gfs2_lm_withdraw(sdp,
	158	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	159	"GFS2: fsid=%s: RG = %llu\n"
	160	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	161	sdp->sd_fsname,
bb8d8a6f	162	sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
b3b94faa DT	163	sdp->sd_fsname, function, file, line);
	164	return rv;
	165	}
	166
	167	/**
	168	* gfs2_meta_check_ii - Flag a magic number 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_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	174	const char type, const char function, char *file,
	175	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 (%s)\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,
b3b94faa DT	184	sdp->sd_fsname, function, file, line);
	185	return (me) ? -1 : -2;
	186	}
	187
	188	/**
	189	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	190	* Returns: -1 if this call withdrew the machine,
	191	* -2 if it was already withdrawn
	192	*/
	193
	194	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	195	u16 type, u16 t, const char *function,
b3b94faa DT	196	char *file, unsigned int line)
	197	{
	198	int me;
	199	me = gfs2_lm_withdraw(sdp,
	200	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	201	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	202	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	203	sdp->sd_fsname,
382066da	204	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	205	sdp->sd_fsname, function, file, line);
	206	return (me) ? -1 : -2;
	207	}
	208
	209	/**
	210	* gfs2_io_error_i - Flag an I/O error and withdraw
	211	* Returns: -1 if this call withdrew the machine,
	212	* 0 if it was already withdrawn
	213	*/
	214
	215	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	216	unsigned int line)
	217	{
	218	int rv;
	219	rv = gfs2_lm_withdraw(sdp,
	220	"GFS2: fsid=%s: fatal: I/O error\n"
	221	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	222	sdp->sd_fsname,
	223	sdp->sd_fsname, function, file, line);
	224	return rv;
	225	}
	226
	227	/**
	228	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	229	* Returns: -1 if this call withdrew the machine,
	230	* 0 if it was already withdrawn
	231	*/
	232
	233	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	234	const char function, char file, unsigned int line)
	235	{
	236	int rv;
	237	rv = gfs2_lm_withdraw(sdp,
	238	"GFS2: fsid=%s: fatal: I/O error\n"
	239	"GFS2: fsid=%s: block = %llu\n"
	240	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	241	sdp->sd_fsname,
382066da	242	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	243	sdp->sd_fsname, function, file, line);
	244	return rv;
	245	}
	246
b3b94faa DT	247	void gfs2_icbit_munge(struct gfs2_sbd sdp, unsigned char *bitmap,
	248	unsigned int bit, int new_value)
	249	{
	250	unsigned int c, o, b = bit;
	251	int old_value;
	252
	253	c = b / (8 * PAGE_SIZE);
	254	b %= 8 * PAGE_SIZE;
	255	o = b / 8;
	256	b %= 8;
	257
	258	old_value = (bitmap[c][o] & (1 << b));
	259	gfs2_assert_withdraw(sdp, !old_value != !new_value);
	260
	261	if (new_value)
	262	bitmap[c][o] \|= 1 << b;
	263	else
	264	bitmap[c][o] &= ~(1 << b);
	265	}
	266