[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.
 */

#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_rsrv_cachep __read_mostly;
mempool_t *gfs2_page_pool __read_mostly;

void gfs2_assert_i(struct gfs2_sbd *sdp)
{
	pr_emerg("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		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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("fsid=%s: warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
			sdp->sd_fsname, 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,
		"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
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;
36f5580b	30	struct kmem_cache *gfs2_rsrv_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	{
d77d1b58	35	pr_emerg("fsid=%s: fatal assertion failed\n", sdp->sd_fsname);
b3b94faa DT	36	}
b3b94faa DT	37
da755fdb SW	38	int gfs2_lm_withdraw(struct gfs2_sbd sdp, char fmt, ...)
da755fdb SW	39	{
f057f6cd SW	40	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
f057f6cd SW	41	const struct lm_lockops *lm = ls->ls_ops;
da755fdb SW	42	va_list args;
da755fdb SW	43
d34843d0 BP	44	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
d34843d0 BP	45	test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
da755fdb SW	46	return 0;
	47
	48	va_start(args, fmt);
	49	vprintk(fmt, args);
	50	va_end(args);
	51
d34843d0 BP	52	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
	53	fs_err(sdp, "about to withdraw this file system\n");
	54	BUG_ON(sdp->sd_args.ar_debug);
da755fdb	55
d34843d0	56	kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
f057f6cd	57
fd95e81c SW	58	if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
	59	wait_for_completion(&sdp->sd_wdack);
	60
d34843d0 BP	61	if (lm->lm_unmount) {
	62	fs_err(sdp, "telling LM to unmount\n");
	63	lm->lm_unmount(sdp);
	64	}
	65	fs_err(sdp, "withdrawn\n");
	66	dump_stack();
f057f6cd	67	}
d34843d0 BP	68
d34843d0 BP	69	if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
d77d1b58	70	panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
da755fdb SW	71
	72	return -1;
	73	}
	74
b3b94faa DT	75	/**
	76	* gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
	77	* Returns: -1 if this call withdrew the machine,
	78	* -2 if it was already withdrawn
	79	*/
	80
	81	int gfs2_assert_withdraw_i(struct gfs2_sbd sdp, char assertion,
	82	const char function, char file, unsigned int line)
	83	{
	84	int me;
	85	me = gfs2_lm_withdraw(sdp,
	86	"GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
	87	"GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
	88	sdp->sd_fsname, assertion,
	89	sdp->sd_fsname, function, file, line);
18ec7d5c	90	dump_stack();
b3b94faa DT	91	return (me) ? -1 : -2;
	92	}
	93
	94	/**
	95	* gfs2_assert_warn_i - Print a message to the console if @assertion is false
	96	* Returns: -1 if we printed something
	97	* -2 if we didn't
	98	*/
	99
	100	int gfs2_assert_warn_i(struct gfs2_sbd sdp, char assertion,
	101	const char function, char file, unsigned int line)
	102	{
	103	if (time_before(jiffies,
	104	sdp->sd_last_warning +
	105	gfs2_tune_get(sdp, gt_complain_secs) * HZ))
	106	return -2;
	107
d34843d0	108	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
d77d1b58 JP	109	pr_warn("fsid=%s: warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
d77d1b58 JP	110	sdp->sd_fsname, assertion, 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