[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 <linux/uaccess.h>

#include "gfs2.h"
#include "incore.h"
#include "glock.h"
#include "rgrp.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;

	if (fmt) {
		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		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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;

	gfs2_rgrp_dump(NULL, rgd->rd_gl);
	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
 * @withdraw: withdraw the filesystem
 */

void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
			const char *function, char *file, unsigned int line,
			bool withdraw)
{
	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
		fs_err(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);
	if (withdraw)
		gfs2_lm_withdraw(sdp, NULL);
}
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>
7c0f6ba6	17	#include <linux/uaccess.h>
b3b94faa DT	18
b3b94faa DT	19	#include "gfs2.h"
5c676f6d	20	#include "incore.h"
b3b94faa	21	#include "glock.h"
72244b6b	22	#include "rgrp.h"
5c676f6d	23	#include "util.h"
b3b94faa	24
e18b890b	25	struct kmem_cache *gfs2_glock_cachep __read_mostly;
009d8518	26	struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
e18b890b CL	27	struct kmem_cache *gfs2_inode_cachep __read_mostly;
e18b890b CL	28	struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
6bdd9be6	29	struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
37b2c837	30	struct kmem_cache *gfs2_quotad_cachep __read_mostly;
b54e9a0b	31	struct kmem_cache *gfs2_qadata_cachep __read_mostly;
e8c92ed7	32	mempool_t *gfs2_page_pool __read_mostly;
b3b94faa	33
b3b94faa DT	34	void gfs2_assert_i(struct gfs2_sbd *sdp)
b3b94faa DT	35	{
8382e26b	36	fs_emerg(sdp, "fatal assertion failed\n");
b3b94faa DT	37	}
b3b94faa DT	38
cb94eb06	39	int gfs2_lm_withdraw(struct gfs2_sbd sdp, const char fmt, ...)
da755fdb	40	{
f057f6cd SW	41	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
f057f6cd SW	42	const struct lm_lockops *lm = ls->ls_ops;
da755fdb	43	va_list args;
cb94eb06	44	struct va_format vaf;
da755fdb	45
d34843d0 BP	46	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
d34843d0 BP	47	test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
da755fdb SW	48	return 0;
da755fdb SW	49
9e1a9ecd AG	50	if (fmt) {
9e1a9ecd AG	51	va_start(args, fmt);
cb94eb06	52
9e1a9ecd AG	53	vaf.fmt = fmt;
9e1a9ecd AG	54	vaf.va = &args;
cb94eb06	55
9e1a9ecd	56	fs_err(sdp, "%pV", &vaf);
cb94eb06	57
9e1a9ecd AG	58	va_end(args);
9e1a9ecd AG	59	}
da755fdb	60
d34843d0 BP	61	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
	62	fs_err(sdp, "about to withdraw this file system\n");
	63	BUG_ON(sdp->sd_args.ar_debug);
da755fdb	64
d34843d0	65	kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
f057f6cd	66
fd95e81c SW	67	if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
	68	wait_for_completion(&sdp->sd_wdack);
	69
d34843d0 BP	70	if (lm->lm_unmount) {
	71	fs_err(sdp, "telling LM to unmount\n");
	72	lm->lm_unmount(sdp);
	73	}
3e11e530	74	set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
d34843d0 BP	75	fs_err(sdp, "withdrawn\n");
d34843d0 BP	76	dump_stack();
f057f6cd	77	}
d34843d0 BP	78
d34843d0 BP	79	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
d77d1b58	80	panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
da755fdb SW	81
	82	return -1;
	83	}
	84
b3b94faa DT	85	/**
	86	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	87	* Returns: -1 if this call withdrew the machine,
	88	* -2 if it was already withdrawn
	89	*/
	90
	91	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	92	const char function, char file, unsigned int line)
	93	{
	94	int me;
	95	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	96	"fatal: assertion \"%s\" failed\n"
	97	" function = %s, file = %s, line = %u\n",
	98	assertion, function, file, line);
18ec7d5c	99	dump_stack();
b3b94faa DT	100	return (me) ? -1 : -2;
	101	}
	102
	103	/**
	104	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	105	* Returns: -1 if we printed something
	106	* -2 if we didn't
	107	*/
	108
	109	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	110	const char function, char file, unsigned int line)
	111	{
	112	if (time_before(jiffies,
	113	sdp->sd_last_warning +
	114	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	115	return -2;
	116
d34843d0	117	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
8382e26b JP	118	fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
8382e26b JP	119	assertion, function, file, line);
b3b94faa DT	120
	121	if (sdp->sd_args.ar_debug)
	122	BUG();
18ec7d5c SW	123	else
18ec7d5c SW	124	dump_stack();
b3b94faa	125
d34843d0 BP	126	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
	127	panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
	128	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	129	sdp->sd_fsname, assertion,
	130	sdp->sd_fsname, function, file, line);
	131
b3b94faa DT	132	sdp->sd_last_warning = jiffies;
	133
	134	return -1;
	135	}
	136
	137	/**
	138	* gfs2_consist_i - Flag a filesystem consistency error and withdraw
	139	* Returns: -1 if this call withdrew the machine,
	140	* 0 if it was already withdrawn
	141	*/
	142
	143	int gfs2_consist_i(struct gfs2_sbd sdp, int cluster_wide, const char function,
	144	char *file, unsigned int line)
	145	{
	146	int rv;
	147	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	148	"fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
cb94eb06 JP	149	function, file, line);
b3b94faa DT	150	return rv;
	151	}
	152
	153	/**
	154	* gfs2_consist_inode_i - Flag an inode consistency error and withdraw
	155	* Returns: -1 if this call withdrew the machine,
	156	* 0 if it was already withdrawn
	157	*/
	158
	159	int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
	160	const char function, char file, unsigned int line)
	161	{
feaa7bba	162	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa DT	163	int rv;
b3b94faa DT	164	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	165	"fatal: filesystem consistency error\n"
	166	" inode = %llu %llu\n"
	167	" function = %s, file = %s, line = %u\n",
	168	(unsigned long long)ip->i_no_formal_ino,
	169	(unsigned long long)ip->i_no_addr,
	170	function, file, line);
b3b94faa DT	171	return rv;
	172	}
	173
	174	/**
	175	* gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
	176	* Returns: -1 if this call withdrew the machine,
	177	* 0 if it was already withdrawn
	178	*/
	179
	180	int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
	181	const char function, char file, unsigned int line)
	182	{
	183	struct gfs2_sbd *sdp = rgd->rd_sbd;
	184	int rv;
72244b6b BP	185
72244b6b BP	186	gfs2_rgrp_dump(NULL, rgd->rd_gl);
b3b94faa	187	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	188	"fatal: filesystem consistency error\n"
	189	" RG = %llu\n"
	190	" function = %s, file = %s, line = %u\n",
	191	(unsigned long long)rgd->rd_addr,
	192	function, file, line);
b3b94faa DT	193	return rv;
	194	}
	195
	196	/**
	197	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	198	* Returns: -1 if this call withdrew the machine,
	199	* -2 if it was already withdrawn
	200	*/
	201
	202	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	203	const char type, const char function, char *file,
	204	unsigned int line)
	205	{
	206	int me;
	207	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	208	"fatal: invalid metadata block\n"
	209	" bh = %llu (%s)\n"
	210	" function = %s, file = %s, line = %u\n",
	211	(unsigned long long)bh->b_blocknr, type,
	212	function, file, line);
b3b94faa DT	213	return (me) ? -1 : -2;
	214	}
	215
	216	/**
	217	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	218	* Returns: -1 if this call withdrew the machine,
	219	* -2 if it was already withdrawn
	220	*/
	221
	222	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	223	u16 type, u16 t, const char *function,
b3b94faa DT	224	char *file, unsigned int line)
	225	{
	226	int me;
	227	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	228	"fatal: invalid metadata block\n"
	229	" bh = %llu (type: exp=%u, found=%u)\n"
	230	" function = %s, file = %s, line = %u\n",
	231	(unsigned long long)bh->b_blocknr, type, t,
	232	function, file, line);
b3b94faa DT	233	return (me) ? -1 : -2;
	234	}
	235
	236	/**
	237	* gfs2_io_error_i - Flag an I/O error and withdraw
	238	* Returns: -1 if this call withdrew the machine,
	239	* 0 if it was already withdrawn
	240	*/
	241
	242	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	243	unsigned int line)
	244	{
	245	int rv;
	246	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	247	"fatal: I/O error\n"
	248	" function = %s, file = %s, line = %u\n",
	249	function, file, line);
b3b94faa DT	250	return rv;
	251	}
	252
	253	/**
9e1a9ecd AG	254	* gfs2_io_error_bh_i - Flag a buffer I/O error
9e1a9ecd AG	255	* @withdraw: withdraw the filesystem
b3b94faa DT	256	*/
b3b94faa DT	257
9e1a9ecd AG	258	void gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	259	const char function, char file, unsigned int line,
	260	bool withdraw)
b3b94faa	261	{
b524abcc BP	262	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
	263	fs_err(sdp,
	264	"fatal: I/O error\n"
	265	" block = %llu\n"
	266	" function = %s, file = %s, line = %u\n",
	267	(unsigned long long)bh->b_blocknr,
	268	function, file, line);
9e1a9ecd AG	269	if (withdraw)
9e1a9ecd AG	270	gfs2_lm_withdraw(sdp, NULL);
b3b94faa DT	271	}
b3b94faa DT	272