[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/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)
{
	pr_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 (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
			wait_for_completion(&sdp->sd_wdack);

		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		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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)
		pr_warn("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;
}
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)
b3b94faa DT	32	{
fc554ed3	33	pr_emerg("GFS2: fsid=%s: fatal assertion failed\n", sdp->sd_fsname);
b3b94faa DT	34	}
b3b94faa DT	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
fd95e81c SW	56	if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
	57	wait_for_completion(&sdp->sd_wdack);
	58
d34843d0 BP	59	if (lm->lm_unmount) {
	60	fs_err(sdp, "telling LM to unmount\n");
	61	lm->lm_unmount(sdp);
	62	}
	63	fs_err(sdp, "withdrawn\n");
	64	dump_stack();
f057f6cd	65	}
d34843d0 BP	66
	67	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	68	panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
da755fdb SW	69
	70	return -1;
	71	}
	72
b3b94faa DT	73	/**
	74	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	75	* Returns: -1 if this call withdrew the machine,
	76	* -2 if it was already withdrawn
	77	*/
	78
	79	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	80	const char function, char file, unsigned int line)
	81	{
	82	int me;
	83	me = gfs2_lm_withdraw(sdp,
	84	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	85	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	86	sdp->sd_fsname, assertion,
	87	sdp->sd_fsname, function, file, line);
18ec7d5c	88	dump_stack();
b3b94faa DT	89	return (me) ? -1 : -2;
	90	}
	91
	92	/**
	93	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	94	* Returns: -1 if we printed something
	95	* -2 if we didn't
	96	*/
	97
	98	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	99	const char function, char file, unsigned int line)
	100	{
	101	if (time_before(jiffies,
	102	sdp->sd_last_warning +
	103	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	104	return -2;
	105
d34843d0	106	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
fc554ed3	107	pr_warn("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
d34843d0 BP	108	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	109	sdp->sd_fsname, assertion,
	110	sdp->sd_fsname, function, file, line);
b3b94faa DT	111
	112	if (sdp->sd_args.ar_debug)
	113	BUG();
18ec7d5c SW	114	else
18ec7d5c SW	115	dump_stack();
b3b94faa	116
d34843d0 BP	117	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	118	panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	119	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	120	sdp->sd_fsname, assertion,
	121	sdp->sd_fsname, function, file, line);
	122
b3b94faa DT	123	sdp->sd_last_warning = jiffies;
	124
	125	return -1;
	126	}
	127
	128	/**
	129	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	130	* Returns: -1 if this call withdrew the machine,
	131	* 0 if it was already withdrawn
	132	*/
	133
	134	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	135	char *file, unsigned int line)
	136	{
	137	int rv;
	138	rv = gfs2_lm_withdraw(sdp,
	139	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	140	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	141	sdp->sd_fsname,
	142	sdp->sd_fsname, function, file, line);
	143	return rv;
	144	}
	145
	146	/**
	147	* gfs2_consist_inode_i - Flag an inode 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_inode_i(struct gfs2_inode *ip, int cluster_wide,
	153	const char function, char file, unsigned int line)
	154	{
feaa7bba	155	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	156	int rv;
	157	rv = gfs2_lm_withdraw(sdp,
	158	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	159	"GFS2: fsid=%s: inode = %llu %llu\n"
	160	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	161	sdp->sd_fsname,
dbb7cae2 SW	162	sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
dbb7cae2 SW	163	(unsigned long long)ip->i_no_addr,
b3b94faa DT	164	sdp->sd_fsname, function, file, line);
	165	return rv;
	166	}
	167
	168	/**
	169	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	170	* Returns: -1 if this call withdrew the machine,
	171	* 0 if it was already withdrawn
	172	*/
	173
	174	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	175	const char function, char file, unsigned int line)
	176	{
	177	struct gfs2_sbd *sdp = rgd->rd_sbd;
	178	int rv;
	179	rv = gfs2_lm_withdraw(sdp,
	180	"GFS2: fsid=%s: fatal: filesystem consistency error\n"
	181	"GFS2: fsid=%s: RG = %llu\n"
	182	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	183	sdp->sd_fsname,
bb8d8a6f	184	sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
b3b94faa DT	185	sdp->sd_fsname, function, file, line);
	186	return rv;
	187	}
	188
	189	/**
	190	* gfs2_meta_check_ii - Flag a magic number 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_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	196	const char type, const char function, char *file,
	197	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 (%s)\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,
b3b94faa DT	206	sdp->sd_fsname, function, file, line);
	207	return (me) ? -1 : -2;
	208	}
	209
	210	/**
	211	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	212	* Returns: -1 if this call withdrew the machine,
	213	* -2 if it was already withdrawn
	214	*/
	215
	216	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	217	u16 type, u16 t, const char *function,
b3b94faa DT	218	char *file, unsigned int line)
	219	{
	220	int me;
	221	me = gfs2_lm_withdraw(sdp,
	222	"GFS2: fsid=%s: fatal: invalid metadata block\n"
	223	"GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
	224	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	225	sdp->sd_fsname,
382066da	226	sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
b3b94faa DT	227	sdp->sd_fsname, function, file, line);
	228	return (me) ? -1 : -2;
	229	}
	230
	231	/**
	232	* gfs2_io_error_i - Flag an I/O error and withdraw
	233	* Returns: -1 if this call withdrew the machine,
	234	* 0 if it was already withdrawn
	235	*/
	236
	237	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	238	unsigned int line)
	239	{
	240	int rv;
	241	rv = gfs2_lm_withdraw(sdp,
	242	"GFS2: fsid=%s: fatal: I/O error\n"
	243	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	244	sdp->sd_fsname,
	245	sdp->sd_fsname, function, file, line);
	246	return rv;
	247	}
	248
	249	/**
	250	* gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
	251	* Returns: -1 if this call withdrew the machine,
	252	* 0 if it was already withdrawn
	253	*/
	254
	255	int gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	256	const char function, char file, unsigned int line)
	257	{
	258	int rv;
	259	rv = gfs2_lm_withdraw(sdp,
	260	"GFS2: fsid=%s: fatal: I/O error\n"
	261	"GFS2: fsid=%s: block = %llu\n"
	262	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	263	sdp->sd_fsname,
382066da	264	sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
b3b94faa DT	265	sdp->sd_fsname, function, file, line);
	266	return rv;
	267	}
	268