[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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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_qadata_cachep __read_mostly;
mempool_t *gfs2_page_pool __read_mostly;

void gfs2_assert_i(struct gfs2_sbd *sdp)
{
	fs_emerg(sdp, "fatal assertion failed\n");
}

int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	const struct lm_lockops *lm = ls->ls_ops;
	va_list args;
	struct va_format vaf;

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

	va_start(args, fmt);

	vaf.fmt = fmt;
	vaf.va = &args;

	fs_err(sdp, "%pV", &vaf);

	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);
		}
		set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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,
			      "fatal: assertion \"%s\" failed\n"
			      "   function = %s, file = %s, line = %u\n",
			      assertion, 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)
		fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
			assertion, 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,
			      "fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
			      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,
			      "fatal: filesystem consistency error\n"
			      "  inode = %llu %llu\n"
			      "  function = %s, file = %s, line = %u\n",
			      (unsigned long long)ip->i_no_formal_ino,
			      (unsigned long long)ip->i_no_addr,
			      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,
			      "fatal: filesystem consistency error\n"
			      "  RG = %llu\n"
			      "  function = %s, file = %s, line = %u\n",
			      (unsigned long long)rgd->rd_addr,
			      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,
			      "fatal: invalid metadata block\n"
			      "  bh = %llu (%s)\n"
			      "  function = %s, file = %s, line = %u\n",
			      (unsigned long long)bh->b_blocknr, type,
			      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,
			      "fatal: invalid metadata block\n"
			      "  bh = %llu (type: exp=%u, found=%u)\n"
			      "  function = %s, file = %s, line = %u\n",
			      (unsigned long long)bh->b_blocknr, type, t,
			      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,
			      "fatal: I/O error\n"
			      "  function = %s, file = %s, line = %u\n",
			      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,
			      "fatal: I/O error\n"
			      "  block = %llu\n"
			      "  function = %s, file = %s, line = %u\n",
			      (unsigned long long)bh->b_blocknr,
			      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
d77d1b58 JP	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d77d1b58 JP	11
b3b94faa DT	12	#include <linux/spinlock.h>
	13	#include <linux/completion.h>
	14	#include <linux/buffer_head.h>
	15	#include <linux/crc32.h>
5c676f6d	16	#include <linux/gfs2_ondisk.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	24	struct kmem_cache *gfs2_glock_cachep __read_mostly;
009d8518	25	struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
e18b890b CL	26	struct kmem_cache *gfs2_inode_cachep __read_mostly;
e18b890b CL	27	struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
6bdd9be6	28	struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
37b2c837	29	struct kmem_cache *gfs2_quotad_cachep __read_mostly;
b54e9a0b	30	struct kmem_cache *gfs2_qadata_cachep __read_mostly;
e8c92ed7	31	mempool_t *gfs2_page_pool __read_mostly;
b3b94faa	32
b3b94faa DT	33	void gfs2_assert_i(struct gfs2_sbd *sdp)
b3b94faa DT	34	{
8382e26b	35	fs_emerg(sdp, "fatal assertion failed\n");
b3b94faa DT	36	}
b3b94faa DT	37
cb94eb06	38	int gfs2_lm_withdraw(struct gfs2_sbd sdp, const char fmt, ...)
da755fdb	39	{
f057f6cd SW	40	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
f057f6cd SW	41	const struct lm_lockops *lm = ls->ls_ops;
da755fdb	42	va_list args;
cb94eb06	43	struct va_format vaf;
da755fdb	44
d34843d0 BP	45	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
d34843d0 BP	46	test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
da755fdb SW	47	return 0;
	48
	49	va_start(args, fmt);
cb94eb06 JP	50
	51	vaf.fmt = fmt;
	52	vaf.va = &args;
	53
	54	fs_err(sdp, "%pV", &vaf);
	55
da755fdb SW	56	va_end(args);
da755fdb SW	57
d34843d0 BP	58	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
	59	fs_err(sdp, "about to withdraw this file system\n");
	60	BUG_ON(sdp->sd_args.ar_debug);
da755fdb	61
d34843d0	62	kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
f057f6cd	63
fd95e81c SW	64	if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
	65	wait_for_completion(&sdp->sd_wdack);
	66
d34843d0 BP	67	if (lm->lm_unmount) {
	68	fs_err(sdp, "telling LM to unmount\n");
	69	lm->lm_unmount(sdp);
	70	}
3e11e530	71	set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
d34843d0 BP	72	fs_err(sdp, "withdrawn\n");
d34843d0 BP	73	dump_stack();
f057f6cd	74	}
d34843d0 BP	75
d34843d0 BP	76	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
d77d1b58	77	panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
da755fdb SW	78
	79	return -1;
	80	}
	81
b3b94faa DT	82	/**
	83	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	84	* Returns: -1 if this call withdrew the machine,
	85	* -2 if it was already withdrawn
	86	*/
	87
	88	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	89	const char function, char file, unsigned int line)
	90	{
	91	int me;
	92	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	93	"fatal: assertion \"%s\" failed\n"
	94	" function = %s, file = %s, line = %u\n",
	95	assertion, function, file, line);
18ec7d5c	96	dump_stack();
b3b94faa DT	97	return (me) ? -1 : -2;
	98	}
	99
	100	/**
	101	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	102	* Returns: -1 if we printed something
	103	* -2 if we didn't
	104	*/
	105
	106	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	107	const char function, char file, unsigned int line)
	108	{
	109	if (time_before(jiffies,
	110	sdp->sd_last_warning +
	111	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	112	return -2;
	113
d34843d0	114	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
8382e26b JP	115	fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
8382e26b JP	116	assertion, function, file, line);
b3b94faa DT	117
	118	if (sdp->sd_args.ar_debug)
	119	BUG();
18ec7d5c SW	120	else
18ec7d5c SW	121	dump_stack();
b3b94faa	122
d34843d0 BP	123	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	124	panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	125	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	126	sdp->sd_fsname, assertion,
	127	sdp->sd_fsname, function, file, line);
	128
b3b94faa DT	129	sdp->sd_last_warning = jiffies;
	130
	131	return -1;
	132	}
	133
	134	/**
	135	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	136	* Returns: -1 if this call withdrew the machine,
	137	* 0 if it was already withdrawn
	138	*/
	139
	140	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	141	char *file, unsigned int line)
	142	{
	143	int rv;
	144	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	145	"fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
cb94eb06 JP	146	function, file, line);
b3b94faa DT	147	return rv;
	148	}
	149
	150	/**
	151	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	152	* Returns: -1 if this call withdrew the machine,
	153	* 0 if it was already withdrawn
	154	*/
	155
	156	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	157	const char function, char file, unsigned int line)
	158	{
feaa7bba	159	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	160	int rv;
b3b94faa DT	161	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	162	"fatal: filesystem consistency error\n"
	163	" inode = %llu %llu\n"
	164	" function = %s, file = %s, line = %u\n",
	165	(unsigned long long)ip->i_no_formal_ino,
	166	(unsigned long long)ip->i_no_addr,
	167	function, file, line);
b3b94faa DT	168	return rv;
	169	}
	170
	171	/**
	172	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	173	* Returns: -1 if this call withdrew the machine,
	174	* 0 if it was already withdrawn
	175	*/
	176
	177	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	178	const char function, char file, unsigned int line)
	179	{
	180	struct gfs2_sbd *sdp = rgd->rd_sbd;
	181	int rv;
	182	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	183	"fatal: filesystem consistency error\n"
	184	" RG = %llu\n"
	185	" function = %s, file = %s, line = %u\n",
	186	(unsigned long long)rgd->rd_addr,
	187	function, file, line);
b3b94faa DT	188	return rv;
	189	}
	190
	191	/**
	192	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	193	* Returns: -1 if this call withdrew the machine,
	194	* -2 if it was already withdrawn
	195	*/
	196
	197	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	198	const char type, const char function, char *file,
	199	unsigned int line)
	200	{
	201	int me;
	202	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	203	"fatal: invalid metadata block\n"
	204	" bh = %llu (%s)\n"
	205	" function = %s, file = %s, line = %u\n",
	206	(unsigned long long)bh->b_blocknr, type,
	207	function, file, line);
b3b94faa DT	208	return (me) ? -1 : -2;
	209	}
	210
	211	/**
	212	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	213	* Returns: -1 if this call withdrew the machine,
	214	* -2 if it was already withdrawn
	215	*/
	216
	217	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	218	u16 type, u16 t, const char *function,
b3b94faa DT	219	char *file, unsigned int line)
	220	{
	221	int me;
	222	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	223	"fatal: invalid metadata block\n"
	224	" bh = %llu (type: exp=%u, found=%u)\n"
	225	" function = %s, file = %s, line = %u\n",
	226	(unsigned long long)bh->b_blocknr, type, t,
	227	function, file, line);
b3b94faa DT	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,
cb94eb06 JP	242	"fatal: I/O error\n"
	243	" function = %s, file = %s, line = %u\n",
	244	function, file, line);
b3b94faa DT	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,
cb94eb06 JP	259	"fatal: I/O error\n"
	260	" block = %llu\n"
	261	" function = %s, file = %s, line = %u\n",
	262	(unsigned long long)bh->b_blocknr,
	263	function, file, line);
b3b94faa DT	264	return rv;
	265	}
	266