[mirror_ubuntu-artful-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.
 */

#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);
		}
		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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	}
	71	fs_err(sdp, "withdrawn\n");
	72	dump_stack();
f057f6cd	73	}
d34843d0 BP	74
d34843d0 BP	75	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
d77d1b58	76	panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
da755fdb SW	77
	78	return -1;
	79	}
	80
b3b94faa DT	81	/**
	82	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	83	* Returns: -1 if this call withdrew the machine,
	84	* -2 if it was already withdrawn
	85	*/
	86
	87	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	88	const char function, char file, unsigned int line)
	89	{
	90	int me;
	91	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	92	"fatal: assertion \"%s\" failed\n"
	93	" function = %s, file = %s, line = %u\n",
	94	assertion, function, file, line);
18ec7d5c	95	dump_stack();
b3b94faa DT	96	return (me) ? -1 : -2;
	97	}
	98
	99	/**
	100	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	101	* Returns: -1 if we printed something
	102	* -2 if we didn't
	103	*/
	104
	105	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	106	const char function, char file, unsigned int line)
	107	{
	108	if (time_before(jiffies,
	109	sdp->sd_last_warning +
	110	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	111	return -2;
	112
d34843d0	113	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
8382e26b JP	114	fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
8382e26b JP	115	assertion, function, file, line);
b3b94faa DT	116
	117	if (sdp->sd_args.ar_debug)
	118	BUG();
18ec7d5c SW	119	else
18ec7d5c SW	120	dump_stack();
b3b94faa	121
d34843d0 BP	122	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	123	panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	124	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	125	sdp->sd_fsname, assertion,
	126	sdp->sd_fsname, function, file, line);
	127
b3b94faa DT	128	sdp->sd_last_warning = jiffies;
	129
	130	return -1;
	131	}
	132
	133	/**
	134	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	135	* Returns: -1 if this call withdrew the machine,
	136	* 0 if it was already withdrawn
	137	*/
	138
	139	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	140	char *file, unsigned int line)
	141	{
	142	int rv;
	143	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	144	"fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
cb94eb06 JP	145	function, file, line);
b3b94faa DT	146	return rv;
	147	}
	148
	149	/**
	150	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	151	* Returns: -1 if this call withdrew the machine,
	152	* 0 if it was already withdrawn
	153	*/
	154
	155	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	156	const char function, char file, unsigned int line)
	157	{
feaa7bba	158	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	159	int rv;
b3b94faa DT	160	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	161	"fatal: filesystem consistency error\n"
	162	" inode = %llu %llu\n"
	163	" function = %s, file = %s, line = %u\n",
	164	(unsigned long long)ip->i_no_formal_ino,
	165	(unsigned long long)ip->i_no_addr,
	166	function, file, line);
b3b94faa DT	167	return rv;
	168	}
	169
	170	/**
	171	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	172	* Returns: -1 if this call withdrew the machine,
	173	* 0 if it was already withdrawn
	174	*/
	175
	176	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	177	const char function, char file, unsigned int line)
	178	{
	179	struct gfs2_sbd *sdp = rgd->rd_sbd;
	180	int rv;
	181	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	182	"fatal: filesystem consistency error\n"
	183	" RG = %llu\n"
	184	" function = %s, file = %s, line = %u\n",
	185	(unsigned long long)rgd->rd_addr,
	186	function, file, line);
b3b94faa DT	187	return rv;
	188	}
	189
	190	/**
	191	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	192	* Returns: -1 if this call withdrew the machine,
	193	* -2 if it was already withdrawn
	194	*/
	195
	196	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	197	const char type, const char function, char *file,
	198	unsigned int line)
	199	{
	200	int me;
	201	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	202	"fatal: invalid metadata block\n"
	203	" bh = %llu (%s)\n"
	204	" function = %s, file = %s, line = %u\n",
	205	(unsigned long long)bh->b_blocknr, type,
	206	function, file, line);
b3b94faa DT	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,
cb94eb06 JP	222	"fatal: invalid metadata block\n"
	223	" bh = %llu (type: exp=%u, found=%u)\n"
	224	" function = %s, file = %s, line = %u\n",
	225	(unsigned long long)bh->b_blocknr, type, t,
	226	function, file, line);
b3b94faa DT	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,
cb94eb06 JP	241	"fatal: I/O error\n"
	242	" function = %s, file = %s, line = %u\n",
	243	function, file, line);
b3b94faa DT	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,
cb94eb06 JP	258	"fatal: I/O error\n"
	259	" block = %llu\n"
	260	" function = %s, file = %s, line = %u\n",
	261	(unsigned long long)bh->b_blocknr,
	262	function, file, line);
b3b94faa DT	263	return rv;
	264	}
	265