[linux-2.6-block.git] / fs / gfs2 / util.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 */

#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_WITHDRAWN, &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		fs_err(sdp, "withdrawn\n");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 *          -2 if it was already withdrawn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;
	char fs_id_buf[sizeof(sdp->sd_fsname) + 7];
	int rv;

	sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
	gfs2_rgrp_dump(NULL, rgd->rd_gl, fs_id_buf);
	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 (!gfs2_withdrawn(sdp))
		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
7336d0e6	1	// SPDX-License-Identifier: GPL-2.0-only
b3b94faa DT	2	/*
b3b94faa DT	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	5	*/
b3b94faa DT	6
d77d1b58 JP	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d77d1b58 JP	8
b3b94faa DT	9	#include <linux/spinlock.h>
	10	#include <linux/completion.h>
	11	#include <linux/buffer_head.h>
	12	#include <linux/crc32.h>
5c676f6d	13	#include <linux/gfs2_ondisk.h>
7c0f6ba6	14	#include <linux/uaccess.h>
b3b94faa DT	15
b3b94faa DT	16	#include "gfs2.h"
5c676f6d	17	#include "incore.h"
b3b94faa	18	#include "glock.h"
72244b6b	19	#include "rgrp.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;
b54e9a0b	28	struct kmem_cache *gfs2_qadata_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	{
8382e26b	33	fs_emerg(sdp, "fatal assertion failed\n");
b3b94faa DT	34	}
b3b94faa DT	35
cb94eb06	36	int gfs2_lm_withdraw(struct gfs2_sbd sdp, const char fmt, ...)
da755fdb	37	{
f057f6cd SW	38	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
f057f6cd SW	39	const struct lm_lockops *lm = ls->ls_ops;
da755fdb	40	va_list args;
cb94eb06	41	struct va_format vaf;
da755fdb	42
d34843d0	43	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
04aea0ca	44	test_and_set_bit(SDF_WITHDRAWN, &sdp->sd_flags))
da755fdb SW	45	return 0;
da755fdb SW	46
9e1a9ecd AG	47	if (fmt) {
9e1a9ecd AG	48	va_start(args, fmt);
cb94eb06	49
9e1a9ecd AG	50	vaf.fmt = fmt;
9e1a9ecd AG	51	vaf.va = &args;
cb94eb06	52
9e1a9ecd	53	fs_err(sdp, "%pV", &vaf);
cb94eb06	54
9e1a9ecd AG	55	va_end(args);
9e1a9ecd AG	56	}
da755fdb	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;
98fb0574	181	char fs_id_buf[sizeof(sdp->sd_fsname) + 7];
b3b94faa	182	int rv;
72244b6b	183
3792ce97 BP	184	sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
3792ce97 BP	185	gfs2_rgrp_dump(NULL, rgd->rd_gl, fs_id_buf);
b3b94faa	186	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	187	"fatal: filesystem consistency error\n"
	188	" RG = %llu\n"
	189	" function = %s, file = %s, line = %u\n",
	190	(unsigned long long)rgd->rd_addr,
	191	function, file, line);
b3b94faa DT	192	return rv;
	193	}
	194
	195	/**
	196	* gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
	197	* Returns: -1 if this call withdrew the machine,
	198	* -2 if it was already withdrawn
	199	*/
	200
	201	int gfs2_meta_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
	202	const char type, const char function, char *file,
	203	unsigned int line)
	204	{
	205	int me;
	206	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	207	"fatal: invalid metadata block\n"
	208	" bh = %llu (%s)\n"
	209	" function = %s, file = %s, line = %u\n",
	210	(unsigned long long)bh->b_blocknr, type,
	211	function, file, line);
b3b94faa DT	212	return (me) ? -1 : -2;
	213	}
	214
	215	/**
	216	* gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
	217	* Returns: -1 if this call withdrew the machine,
	218	* -2 if it was already withdrawn
	219	*/
	220
	221	int gfs2_metatype_check_ii(struct gfs2_sbd sdp, struct buffer_head bh,
cd915493	222	u16 type, u16 t, const char *function,
b3b94faa DT	223	char *file, unsigned int line)
	224	{
	225	int me;
	226	me = gfs2_lm_withdraw(sdp,
cb94eb06 JP	227	"fatal: invalid metadata block\n"
	228	" bh = %llu (type: exp=%u, found=%u)\n"
	229	" function = %s, file = %s, line = %u\n",
	230	(unsigned long long)bh->b_blocknr, type, t,
	231	function, file, line);
b3b94faa DT	232	return (me) ? -1 : -2;
	233	}
	234
	235	/**
	236	* gfs2_io_error_i - Flag an I/O error and withdraw
	237	* Returns: -1 if this call withdrew the machine,
	238	* 0 if it was already withdrawn
	239	*/
	240
	241	int gfs2_io_error_i(struct gfs2_sbd sdp, const char function, char *file,
	242	unsigned int line)
	243	{
	244	int rv;
	245	rv = gfs2_lm_withdraw(sdp,
cb94eb06 JP	246	"fatal: I/O error\n"
	247	" function = %s, file = %s, line = %u\n",
	248	function, file, line);
b3b94faa DT	249	return rv;
	250	}
	251
	252	/**
9e1a9ecd AG	253	* gfs2_io_error_bh_i - Flag a buffer I/O error
9e1a9ecd AG	254	* @withdraw: withdraw the filesystem
b3b94faa DT	255	*/
b3b94faa DT	256
9e1a9ecd AG	257	void gfs2_io_error_bh_i(struct gfs2_sbd sdp, struct buffer_head bh,
	258	const char function, char file, unsigned int line,
	259	bool withdraw)
b3b94faa	260	{
eb43e660	261	if (!gfs2_withdrawn(sdp))
b524abcc BP	262	fs_err(sdp,
	263	"fatal: I/O error\n"
	264	" block = %llu\n"
	265	" function = %s, file = %s, line = %u\n",
	266	(unsigned long long)bh->b_blocknr,
	267	function, file, line);
9e1a9ecd AG	268	if (withdraw)
9e1a9ecd AG	269	gfs2_lm_withdraw(sdp, NULL);
b3b94faa DT	270	}
b3b94faa DT	271