[mirror_ubuntu-zesty-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/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;
struct kmem_cache *gfs2_rsrv_cachep __read_mostly;
mempool_t *gfs2_page_pool __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		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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/spinlock.h>
	11	#include <linux/completion.h>
	12	#include <linux/buffer_head.h>
	13	#include <linux/crc32.h>
5c676f6d	14	#include <linux/gfs2_ondisk.h>
b3b94faa DT	15	#include <asm/uaccess.h>
	16
	17	#include "gfs2.h"
5c676f6d	18	#include "incore.h"
b3b94faa	19	#include "glock.h"
5c676f6d	20	#include "util.h"
b3b94faa	21
e18b890b	22	struct kmem_cache *gfs2_glock_cachep __read_mostly;
009d8518	23	struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
e18b890b CL	24	struct kmem_cache *gfs2_inode_cachep __read_mostly;
e18b890b CL	25	struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
6bdd9be6	26	struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
37b2c837	27	struct kmem_cache *gfs2_quotad_cachep __read_mostly;
36f5580b	28	struct kmem_cache *gfs2_rsrv_cachep __read_mostly;
e8c92ed7	29	mempool_t *gfs2_page_pool __read_mostly;
b3b94faa	30
b3b94faa DT	31	void gfs2_assert_i(struct gfs2_sbd *sdp)
	32	{
	33	printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
	34	sdp->sd_fsname);
	35	}
	36
da755fdb SW	37	int gfs2_lm_withdraw(struct gfs2_sbd sdp, char fmt, ...)
da755fdb SW	38	{
f057f6cd SW	39	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
f057f6cd SW	40	const struct lm_lockops *lm = ls->ls_ops;
da755fdb SW	41	va_list args;
da755fdb SW	42
d34843d0 BP	43	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
d34843d0 BP	44	test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
da755fdb SW	45	return 0;
	46
	47	va_start(args, fmt);
	48	vprintk(fmt, args);
	49	va_end(args);
	50
d34843d0 BP	51	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
	52	fs_err(sdp, "about to withdraw this file system\n");
	53	BUG_ON(sdp->sd_args.ar_debug);
da755fdb	54
d34843d0	55	kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
f057f6cd	56
d34843d0 BP	57	if (lm->lm_unmount) {
	58	fs_err(sdp, "telling LM to unmount\n");
	59	lm->lm_unmount(sdp);
	60	}
	61	fs_err(sdp, "withdrawn\n");
	62	dump_stack();
f057f6cd	63	}
d34843d0 BP	64
	65	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	66	panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
da755fdb SW	67
	68	return -1;
	69	}
	70
b3b94faa DT	71	/**
	72	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	73	* Returns: -1 if this call withdrew the machine,
	74	* -2 if it was already withdrawn
	75	*/
	76
	77	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	78	const char function, char file, unsigned int line)
	79	{
	80	int me;
	81	me = gfs2_lm_withdraw(sdp,
	82	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	83	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	84	sdp->sd_fsname, assertion,
	85	sdp->sd_fsname, function, file, line);
18ec7d5c	86	dump_stack();
b3b94faa DT	87	return (me) ? -1 : -2;
	88	}
	89
	90	/**
	91	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	92	* Returns: -1 if we printed something
	93	* -2 if we didn't
	94	*/
	95
	96	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	97	const char function, char file, unsigned int line)
	98	{
	99	if (time_before(jiffies,
	100	sdp->sd_last_warning +
	101	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	102	return -2;
	103
d34843d0 BP	104	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
	105	printk(KERN_WARNING
	106	"GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	107	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	108	sdp->sd_fsname, assertion,
	109	sdp->sd_fsname, function, file, line);
b3b94faa DT	110
	111	if (sdp->sd_args.ar_debug)
	112	BUG();
18ec7d5c SW	113	else
18ec7d5c SW	114	dump_stack();
b3b94faa	115
d34843d0 BP	116	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	117	panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	118	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	119	sdp->sd_fsname, assertion,
	120	sdp->sd_fsname, function, file, line);
	121
b3b94faa DT	122	sdp->sd_last_warning = jiffies;
	123
	124	return -1;
	125	}
	126
	127	/**
	128	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	129	* Returns: -1 if this call withdrew the machine,
	130	* 0 if it was already withdrawn
	131	*/
	132
	133	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	134	char *file, unsigned int line)
	135	{
	136	int rv;
	137	rv = gfs2_lm_withdraw(sdp,
	138	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	139	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	140	sdp->sd_fsname,
	141	sdp->sd_fsname, function, file, line);
	142	return rv;
	143	}
	144
	145	/**
	146	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	147	* Returns: -1 if this call withdrew the machine,
	148	* 0 if it was already withdrawn
	149	*/
	150
	151	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	152	const char function, char file, unsigned int line)
	153	{
feaa7bba	154	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	155	int rv;
	156	rv = gfs2_lm_withdraw(sdp,
	157	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	158	"GFS2: fsid=%s: inode = %llu %llu\n"
	159	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	160	sdp->sd_fsname,
dbb7cae2 SW	161	sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
dbb7cae2 SW	162	(unsigned long long)ip->i_no_addr,
b3b94faa DT	163	sdp->sd_fsname, function, file, line);
	164	return rv;
	165	}
	166
	167	/**
	168	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	169	* Returns: -1 if this call withdrew the machine,
	170	* 0 if it was already withdrawn
	171	*/
	172
	173	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	174	const char function, char file, unsigned int line)
	175	{
	176	struct gfs2_sbd *sdp = rgd->rd_sbd;
	177	int rv;
	178	rv = gfs2_lm_withdraw(sdp,
	179	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	180	"GFS2: fsid=%s: RG = %llu\n"
	181	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	182	sdp->sd_fsname,
bb8d8a6f	183	sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
b3b94faa DT	184	sdp->sd_fsname, function, file, line);
	185	return rv;
	186	}
	187
	188	/**
	189	* gfs2_meta_check_ii - Flag a magic number 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_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	195	const char type, const char function, char *file,
	196	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 (%s)\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,
b3b94faa DT	205	sdp->sd_fsname, function, file, line);
	206	return (me) ? -1 : -2;
	207	}
	208
	209	/**
	210	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	211	* Returns: -1 if this call withdrew the machine,
	212	* -2 if it was already withdrawn
	213	*/
	214
	215	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	216	u16 type, u16 t, const char *function,
b3b94faa DT	217	char *file, unsigned int line)
	218	{
	219	int me;
	220	me = gfs2_lm_withdraw(sdp,
	221	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	222	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	223	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	224	sdp->sd_fsname,
382066da	225	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	226	sdp->sd_fsname, function, file, line);
	227	return (me) ? -1 : -2;
	228	}
	229
	230	/**
	231	* gfs2_io_error_i - Flag an I/O error and withdraw
	232	* Returns: -1 if this call withdrew the machine,
	233	* 0 if it was already withdrawn
	234	*/
	235
	236	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	237	unsigned int line)
	238	{
	239	int rv;
	240	rv = gfs2_lm_withdraw(sdp,
	241	"GFS2: fsid=%s: fatal: I/O error\n"
	242	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	243	sdp->sd_fsname,
	244	sdp->sd_fsname, function, file, line);
	245	return rv;
	246	}
	247
	248	/**
	249	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	250	* Returns: -1 if this call withdrew the machine,
	251	* 0 if it was already withdrawn
	252	*/
	253
	254	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	255	const char function, char file, unsigned int line)
	256	{
	257	int rv;
	258	rv = gfs2_lm_withdraw(sdp,
	259	"GFS2: fsid=%s: fatal: I/O error\n"
	260	"GFS2: fsid=%s: block = %llu\n"
	261	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	262	sdp->sd_fsname,
382066da	263	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	264	sdp->sd_fsname, function, file, line);
	265	return rv;
	266	}
	267
b3b94faa DT	268	void gfs2_icbit_munge(struct gfs2_sbd sdp, unsigned char *bitmap,
	269	unsigned int bit, int new_value)
	270	{
	271	unsigned int c, o, b = bit;
	272	int old_value;
	273
	274	c = b / (8 * PAGE_SIZE);
	275	b %= 8 * PAGE_SIZE;
	276	o = b / 8;
	277	b %= 8;
	278
	279	old_value = (bitmap[c][o] & (1 << b));
	280	gfs2_assert_withdraw(sdp, !old_value != !new_value);
	281
	282	if (new_value)
	283	bitmap[c][o] \|= 1 << b;
	284	else
	285	bitmap[c][o] &= ~(1 << b);
	286	}
	287