repair: fix an ABBA deadlock in inode prefetching

[thirdparty/xfsprogs-dev.git] / repair / xfs_repair.c

/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <xfs/libxlog.h>
#include <sys/resource.h>
#include "avl.h"
#include "avl64.h"
#include "globals.h"
#include "versions.h"
#include "agheader.h"
#include "protos.h"
#include "incore.h"
#include "err_protos.h"
#include "prefetch.h"
#include "threads.h"
#include "progress.h"

#define	rounddown(x, y)	(((x)/(y))*(y))

extern void	phase1(xfs_mount_t *);
extern void	phase2(xfs_mount_t *, int);
extern void	phase3(xfs_mount_t *);
extern void	phase4(xfs_mount_t *);
extern void	phase5(xfs_mount_t *);
extern void	phase6(xfs_mount_t *);
extern void	phase7(xfs_mount_t *);

#define		XR_MAX_SECT_SIZE	(64 * 1024)

/*
 * option tables for getsubopt calls
 */

/*
 * -o: user-supplied override options
 */

char *o_opts[] = {
#define ASSUME_XFS	0
	"assume_xfs",
#define PRE_65_BETA	1
	"fs_is_pre_65_beta",
#define	IHASH_SIZE	2
	"ihash",
#define	BHASH_SIZE	3
	"bhash",
#define	AG_STRIDE	4
	"ag_stride",
#define FORCE_GEO	5
	"force_geometry",
#define PHASE2_THREADS	6
	"phase2_threads",
	NULL
};

/*
 * -c: conversion options
 */

char *c_opts[] = {
#define CONVERT_LAZY_COUNT	0
	"lazycount",
	NULL
};


static int	ihash_option_used;
static int	bhash_option_used;
static long	max_mem_specified;	/* in megabytes */
static int	phase2_threads = 32;

static void
usage(void)
{
	do_warn(_(
"Usage: %s [options] device\n"
"\n"
"Options:\n"
"  -f           The device is a file\n"
"  -L           Force log zeroing. Do this as a last resort.\n"
"  -l logdev    Specifies the device where the external log resides.\n"
"  -m maxmem    Maximum amount of memory to be used in megabytes.\n"
"  -n           No modify mode, just checks the filesystem for damage.\n"
"  -P           Disables prefetching.\n"
"  -r rtdev     Specifies the device where the realtime section resides.\n"
"  -v           Verbose output.\n"
"  -c subopts   Change filesystem parameters - use xfs_admin.\n"
"  -o subopts   Override default behaviour, refer to man page.\n"
"  -t interval  Reporting interval in minutes.\n"
"  -d           Repair dangerously.\n"
"  -V           Reports version and exits.\n"), progname);
	exit(1);
}

char *
err_string(int err_code)
{
	static char *err_message[XR_BAD_ERR_CODE];
	static int done;

	if (!done) {
		err_message[XR_OK] = _("no error");
		err_message[XR_BAD_MAGIC] = _("bad magic number");
		err_message[XR_BAD_BLOCKSIZE] = _("bad blocksize field");
		err_message[XR_BAD_BLOCKLOG] = _("bad blocksize log field");
		err_message[XR_BAD_VERSION] = _("bad or unsupported version");
		err_message[XR_BAD_INPROGRESS] =
			_("filesystem mkfs-in-progress bit set");
		err_message[XR_BAD_FS_SIZE_DATA] =
			_("inconsistent filesystem geometry information");
		err_message[XR_BAD_INO_SIZE_DATA] =
	_("bad inode size or inconsistent with number of inodes/block"),
		err_message[XR_BAD_SECT_SIZE_DATA] = _("bad sector size");
		err_message[XR_AGF_GEO_MISMATCH] =
	_("AGF geometry info conflicts with filesystem geometry");
		err_message[XR_AGI_GEO_MISMATCH] =
	_("AGI geometry info conflicts with filesystem geometry");
		err_message[XR_SB_GEO_MISMATCH] =
	_("AG superblock geometry info conflicts with filesystem geometry");
		err_message[XR_EOF] = _("attempted to perform I/O beyond EOF");
		err_message[XR_BAD_RT_GEO_DATA] =
	_("inconsistent filesystem geometry in realtime filesystem component");
		err_message[XR_BAD_INO_MAX_PCT] =
			_("maximum indicated percentage of inodes > 100%");
		err_message[XR_BAD_INO_ALIGN] =
			_("inconsistent inode alignment value");
		err_message[XR_INSUFF_SEC_SB] =
	_("not enough secondary superblocks with matching geometry");
		err_message[XR_BAD_SB_UNIT] =
			_("bad stripe unit in superblock");
		err_message[XR_BAD_SB_WIDTH] =
			_("bad stripe width in superblock");
		err_message[XR_BAD_SVN] =
			_("bad shared version number in superblock");
		done = 1;
	}

	if (err_code < XR_OK || err_code >= XR_BAD_ERR_CODE)
		do_abort(_("bad error code - %d\n"), err_code);

	return(err_message[err_code]);
}

static void
noval(char opt, char *tbl[], int idx)
{
	do_warn(_("-%c %s option cannot have a value\n"), opt, tbl[idx]);
	usage();
}

static void
respec(char opt, char *tbl[], int idx)
{
	do_warn("-%c ", opt);
	if (tbl)
		do_warn("%s ", tbl[idx]);
	do_warn(_("option respecified\n"));
	usage();
}

static void
unknown(char opt, char *s)
{
	do_warn(_("unknown option -%c %s\n"), opt, s);
	usage();
}

/*
 * sets only the global argument flags and variables
 */
void
process_args(int argc, char **argv)
{
	char *p;
	int c;

	log_spec = 0;
	fs_is_dirty = 0;
	verbose = 0;
	no_modify = 0;
	dangerously = 0;
	isa_file = 0;
	zap_log = 0;
	dumpcore = 0;
	full_ino_ex_data = 0;
	delete_attr_ok = 1;
	force_geo = 0;
	assume_xfs = 0;
	clear_sunit = 0;
	sb_inoalignmt = 0;
	sb_unit = 0;
	sb_width = 0;
	fs_attributes_allowed = 1;
	fs_attributes2_allowed = 1;
	fs_inode_nlink_allowed = 1;
	fs_quotas_allowed = 1;
	fs_aligned_inodes_allowed = 1;
	fs_sb_feature_bits_allowed = 1;
	fs_has_extflgbit_allowed = 1;
	pre_65_beta = 0;
	fs_shared_allowed = 1;
	ag_stride = 0;
	thread_count = 1;
	report_interval = PROG_RPT_DEFAULT;

	/*
	 * XXX have to add suboption processing here
	 * attributes, quotas, nlinks, aligned_inos, sb_fbits
	 */
	while ((c = getopt(argc, argv, "c:o:fl:m:r:LnDvVdPt:")) != EOF)  {
		switch (c) {
		case 'D':
			dumpcore = 1;
			break;
		case 'o':
			p = optarg;
			while (*p != '\0')  {
				char *val;

				switch (getsubopt(&p, (constpp)o_opts, &val))  {
				case ASSUME_XFS:
					if (val)
						noval('o', o_opts, ASSUME_XFS);
					if (assume_xfs)
						respec('o', o_opts, ASSUME_XFS);
					assume_xfs = 1;
					break;
				case PRE_65_BETA:
					if (val)
						noval('o', o_opts, PRE_65_BETA);
					if (pre_65_beta)
						respec('o', o_opts,
							PRE_65_BETA);
					pre_65_beta = 1;
					break;
				case IHASH_SIZE:
					libxfs_ihash_size = (int)strtol(val, NULL, 0);
					ihash_option_used = 1;
					break;
				case BHASH_SIZE:
					if (max_mem_specified)
						do_abort(
			_("-o bhash option cannot be used with -m option\n"));
					libxfs_bhash_size = (int)strtol(val, NULL, 0);
					bhash_option_used = 1;
					break;
				case AG_STRIDE:
					ag_stride = (int)strtol(val, NULL, 0);
					break;
				case FORCE_GEO:
					if (val)
						noval('o', o_opts, FORCE_GEO);
					if (force_geo)
						respec('o', o_opts, FORCE_GEO);
					force_geo = 1;
					break;
				case PHASE2_THREADS:
					phase2_threads = (int)strtol(val, NULL, 0);
					break;
				default:
					unknown('o', val);
					break;
				}
			}
			break;
		case 'c':
			p = optarg;
			while (*p) {
				char *val;

				switch (getsubopt(&p, (constpp)c_opts, &val)) {
				case CONVERT_LAZY_COUNT:
					lazy_count = (int)strtol(val, NULL, 0);
					convert_lazy_count = 1;
					break;
				default:
					unknown('c', val);
					break;
				}
			}
			break;
		case 'l':
			log_name = optarg;
			log_spec = 1;
			break;
		case 'r':
			rt_name = optarg;
			rt_spec = 1;
			break;
		case 'f':
			isa_file = 1;
			break;
		case 'm':
			if (bhash_option_used)
				do_abort(_("-m option cannot be used with "
						"-o bhash option\n"));
			max_mem_specified = strtol(optarg, NULL, 0);
			break;
		case 'L':
			zap_log = 1;
			break;
		case 'n':
			no_modify = 1;
			break;
		case 'd':
			dangerously = 1;
			break;
		case 'v':
			verbose++;
			break;
		case 'V':
			printf(_("%s version %s\n"), progname, VERSION);
			exit(0);
		case 'P':
			do_prefetch = 0;
			break;
		case 't':
			report_interval = (int)strtol(optarg, NULL, 0);
			break;
		case '?':
			usage();
		}
	}

	if (argc - optind != 1)
		usage();

	if ((fs_name = argv[optind]) == NULL)
		usage();
}

void __attribute__((noreturn))
do_error(char const *msg, ...)
{
	va_list args;

	fprintf(stderr, _("\nfatal error -- "));

	va_start(args, msg);
	vfprintf(stderr, msg, args);
	if (dumpcore)
		abort();
	exit(1);
}

/*
 * like do_error, only the error is internal, no system
 * error so no oserror processing
 */
void __attribute__((noreturn))
do_abort(char const *msg, ...)
{
	va_list args;

	va_start(args, msg);
	vfprintf(stderr, msg, args);
	if (dumpcore)
		abort();
	exit(1);
}

void
do_warn(char const *msg, ...)
{
	va_list args;

	fs_is_dirty = 1;

	va_start(args, msg);
	vfprintf(stderr, msg, args);
	va_end(args);
}

/* no formatting */

void
do_log(char const *msg, ...)
{
	va_list args;

	va_start(args, msg);
	vfprintf(stderr, msg, args);
	va_end(args);
}

void
calc_mkfs(xfs_mount_t *mp)
{
	xfs_agblock_t	fino_bno;
	int		do_inoalign;

	do_inoalign = mp->m_sinoalign;

	/*
	 * pre-calculate geometry of ag 0.  We know what it looks
	 * like because we know what mkfs does -- 3 btree roots,
	 * and some number of blocks to prefill the agfl.
	 */
	bnobt_root = howmany(4 * mp->m_sb.sb_sectsize, mp->m_sb.sb_blocksize);
	bcntbt_root = bnobt_root + 1;
	inobt_root = bnobt_root + 2;
	fino_bno = inobt_root + XFS_MIN_FREELIST_RAW(1, 1, mp) + 1;

	/*
	 * If we only have a single allocation group the log is also allocated
	 * in the first allocation group and we need to add the number of
	 * blocks used by the log to the above calculation.
	 * All this of course doesn't apply if we have an external log.
	 */
	if (mp->m_sb.sb_agcount == 1 && mp->m_sb.sb_logstart) {
		/*
		 * XXX(hch): verify that sb_logstart makes sense?
		 */
		 fino_bno += mp->m_sb.sb_logblocks;
	}

	/*
	 * ditto the location of the first inode chunks in the fs ('/')
	 */
	if (xfs_sb_version_hasdalign(&mp->m_sb) && do_inoalign)  {
		first_prealloc_ino = XFS_OFFBNO_TO_AGINO(mp, roundup(fino_bno,
					mp->m_sb.sb_unit), 0);
	} else if (xfs_sb_version_hasalign(&mp->m_sb) &&
					mp->m_sb.sb_inoalignmt > 1)  {
		first_prealloc_ino = XFS_OFFBNO_TO_AGINO(mp,
					roundup(fino_bno,
						mp->m_sb.sb_inoalignmt),
					0);
	} else  {
		first_prealloc_ino = XFS_OFFBNO_TO_AGINO(mp, fino_bno, 0);
	}

	ASSERT(XFS_IALLOC_BLOCKS(mp) > 0);

	if (XFS_IALLOC_BLOCKS(mp) > 1)
		last_prealloc_ino = first_prealloc_ino + XFS_INODES_PER_CHUNK;
	else
		last_prealloc_ino = XFS_OFFBNO_TO_AGINO(mp, fino_bno + 1, 0);

	/*
	 * now the first 3 inodes in the system
	 */
	if (mp->m_sb.sb_rootino != first_prealloc_ino)  {
		do_warn(
_("sb root inode value %" PRIu64 " %sinconsistent with calculated value %u\n"),
			mp->m_sb.sb_rootino,
			(mp->m_sb.sb_rootino == NULLFSINO ? "(NULLFSINO) ":""),
			first_prealloc_ino);

		if (!no_modify)
			do_warn(
		_("resetting superblock root inode pointer to %u\n"),
				first_prealloc_ino);
		else
			do_warn(
		_("would reset superblock root inode pointer to %u\n"),
				first_prealloc_ino);

		/*
		 * just set the value -- safe since the superblock
		 * doesn't get flushed out if no_modify is set
		 */
		mp->m_sb.sb_rootino = first_prealloc_ino;
	}

	if (mp->m_sb.sb_rbmino != first_prealloc_ino + 1)  {
		do_warn(
_("sb realtime bitmap inode %" PRIu64 " %sinconsistent with calculated value %u\n"),
			mp->m_sb.sb_rbmino,
			(mp->m_sb.sb_rbmino == NULLFSINO ? "(NULLFSINO) ":""),
			first_prealloc_ino + 1);

		if (!no_modify)
			do_warn(
		_("resetting superblock realtime bitmap ino pointer to %u\n"),
				first_prealloc_ino + 1);
		else
			do_warn(
		_("would reset superblock realtime bitmap ino pointer to %u\n"),
				first_prealloc_ino + 1);

		/*
		 * just set the value -- safe since the superblock
		 * doesn't get flushed out if no_modify is set
		 */
		mp->m_sb.sb_rbmino = first_prealloc_ino + 1;
	}

	if (mp->m_sb.sb_rsumino != first_prealloc_ino + 2)  {
		do_warn(
_("sb realtime summary inode %" PRIu64 " %sinconsistent with calculated value %u\n"),
			mp->m_sb.sb_rsumino,
			(mp->m_sb.sb_rsumino == NULLFSINO ? "(NULLFSINO) ":""),
			first_prealloc_ino + 2);

		if (!no_modify)
			do_warn(
		_("resetting superblock realtime summary ino pointer to %u\n"),
				first_prealloc_ino + 2);
		else
			do_warn(
		_("would reset superblock realtime summary ino pointer to %u\n"),
				first_prealloc_ino + 2);

		/*
		 * just set the value -- safe since the superblock
		 * doesn't get flushed out if no_modify is set
		 */
		mp->m_sb.sb_rsumino = first_prealloc_ino + 2;
	}

}

int
main(int argc, char **argv)
{
	xfs_mount_t	*temp_mp;
	xfs_mount_t	*mp;
	xfs_dsb_t	*dsb;
	xfs_buf_t	*sbp;
	xfs_mount_t	xfs_m;
	char		*msgbuf;

	progname = basename(argv[0]);
	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);

	temp_mp = &xfs_m;
	setbuf(stdout, NULL);

	process_args(argc, argv);
	xfs_init(&x);

	msgbuf = malloc(DURATION_BUF_SIZE);

	timestamp(PHASE_START, 0, NULL);
	timestamp(PHASE_END, 0, NULL);

	/* do phase1 to make sure we have a superblock */
	phase1(temp_mp);
	timestamp(PHASE_END, 1, NULL);

	if (no_modify && primary_sb_modified)  {
		do_warn(_("Primary superblock would have been modified.\n"
			  "Cannot proceed further in no_modify mode.\n"
			  "Exiting now.\n"));
		exit(1);
	}

	/* prepare the mount structure */
	sbp = libxfs_readbuf(x.ddev, XFS_SB_DADDR,
				1 << (XFS_MAX_SECTORSIZE_LOG - BBSHIFT), 0);
	memset(&xfs_m, 0, sizeof(xfs_mount_t));
	libxfs_sb_from_disk(&xfs_m.m_sb, XFS_BUF_TO_SBP(sbp));

	/*
	 * if the sector size of the filesystem we are trying to repair is
	 * smaller than that of the underlying filesystem (i.e. we are repairing
	 * an image), the we have to turn off direct IO because we cannot do IO
	 * smaller than the host filesystem's sector size.
	 */
	if (isa_file) {
		int     fd = libxfs_device_to_fd(x.ddev);
		struct xfs_fsop_geom_v1 geom = { 0 };

		if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) {
			do_warn(_("Cannot get host filesystem geometry.\n"
		"Repair may fail if there is a sector size mismatch between\n"
		"the image and the host filesystem.\n"));
			geom.sectsize = BBSIZE;
		}

		if (xfs_m.m_sb.sb_sectsize < geom.sectsize) {
			long	old_flags;

			old_flags = fcntl(fd, F_GETFL, 0);
			if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) {
				do_warn(_(
		"Sector size on host filesystem larger than image sector size.\n"
		"Cannot turn off direct IO, so exiting.\n"));
				exit(1);
			}
		}
	}
	mp = libxfs_mount(&xfs_m, &xfs_m.m_sb, x.ddev, x.logdev, x.rtdev, 0);

	if (!mp)  {
		fprintf(stderr,
			_("%s: cannot repair this filesystem.  Sorry.\n"),
			progname);
		exit(1);
	}
	libxfs_putbuf(sbp);
	libxfs_purgebuf(sbp);

	/*
	 * set XFS-independent status vars from the mount/sb structure
	 */
	glob_agcount = mp->m_sb.sb_agcount;

	chunks_pblock = mp->m_sb.sb_inopblock / XFS_INODES_PER_CHUNK;
	max_symlink_blocks = howmany(MAXPATHLEN - 1, mp->m_sb.sb_blocksize);
	inodes_per_cluster = MAX(mp->m_sb.sb_inopblock,
			XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);

	if (ag_stride) {
		thread_count = (glob_agcount + ag_stride - 1) / ag_stride;
		thread_init();
	}

	if (ag_stride && report_interval) {
		init_progress_rpt();
		if (msgbuf) {
			do_log(_("        - reporting progress in intervals of %s\n"),
			duration(report_interval, msgbuf));
		}
	}

	/*
	 * Adjust libxfs cache sizes based on system memory,
	 * filesystem size and inode count.
	 *
	 * We'll set the cache size based on 3/4s the memory minus
	 * space used by the inode AVL tree and block usage map.
	 *
	 * Inode AVL tree space is approximately 4 bytes per inode,
	 * block usage map is currently 1 byte for 2 blocks.
	 *
	 * We assume most blocks will be inode clusters.
	 *
	 * Calculations are done in kilobyte units.
	 */

	if (!bhash_option_used || max_mem_specified) {
		unsigned long 	mem_used;
		unsigned long	max_mem;
		struct rlimit	rlim;

		libxfs_icache_purge();
		libxfs_bcache_purge();
		cache_destroy(libxfs_icache);
		cache_destroy(libxfs_bcache);

		mem_used = (mp->m_sb.sb_icount >> (10 - 2)) +
					(mp->m_sb.sb_dblocks >> (10 + 1)) +
					50000;	/* rough estimate of 50MB overhead */
		max_mem = max_mem_specified ? max_mem_specified * 1024 :
						libxfs_physmem() * 3 / 4;

		if (getrlimit(RLIMIT_AS, &rlim) != -1 &&
					rlim.rlim_cur != RLIM_INFINITY) {
			rlim.rlim_cur = rlim.rlim_max;
			setrlimit(RLIMIT_AS, &rlim);
			/* use approximately 80% of rlimit to avoid overrun */
			max_mem = MIN(max_mem, rlim.rlim_cur / 1280);
		} else
			max_mem = MIN(max_mem, (LONG_MAX >> 10) + 1);

		if (verbose > 1)
			do_log(
	_("        - max_mem = %lu, icount = %" PRIu64 ", imem = %" PRIu64 ", dblock = %" PRIu64 ", dmem = %" PRIu64 "\n"),
				max_mem, mp->m_sb.sb_icount,
				mp->m_sb.sb_icount >> (10 - 2),
				mp->m_sb.sb_dblocks,
				mp->m_sb.sb_dblocks >> (10 + 1));

		if (max_mem <= mem_used) {
			/*
			 * Turn off prefetch and minimise libxfs cache if
			 * physical memory is deemed insufficient
			 */
			if (max_mem_specified) {
				do_abort(
	_("Required memory for repair is greater that the maximum specified\n"
	  "with the -m option. Please increase it to at least %lu.\n"),
					mem_used / 1024);
			} else {
				do_warn(
	_("Not enough RAM available for repair to enable prefetching.\n"
	  "This will be _slow_.\n"
	  "You need at least %luMB RAM to run with prefetching enabled.\n"),
					mem_used * 1280 / (1024 * 1024));
			}
			do_prefetch = 0;
			libxfs_bhash_size = 64;
		} else {
			max_mem -= mem_used;
			if (max_mem >= (1 << 30))
				max_mem = 1 << 30;
			libxfs_bhash_size = max_mem / (HASH_CACHE_RATIO *
					(mp->m_inode_cluster_size >> 10));
			if (libxfs_bhash_size < 512)
				libxfs_bhash_size = 512;
		}

		if (verbose)
			do_log(_("        - block cache size set to %d entries\n"),
				libxfs_bhash_size * HASH_CACHE_RATIO);

		if (!ihash_option_used)
			libxfs_ihash_size = libxfs_bhash_size;

		libxfs_icache = cache_init(libxfs_ihash_size,
						&libxfs_icache_operations);
		libxfs_bcache = cache_init(libxfs_bhash_size,
						&libxfs_bcache_operations);
	}

	/*
	 * calculate what mkfs would do to this filesystem
	 */
	calc_mkfs(mp);

	/*
	 * initialize block alloc map
	 */
	init_bmaps(mp);
	incore_ino_init(mp);
	incore_ext_init(mp);

	/* initialize random globals now that we know the fs geometry */
	inodes_per_block = mp->m_sb.sb_inopblock;

	if (parse_sb_version(&mp->m_sb))  {
		do_warn(
	_("Found unsupported filesystem features.  Exiting now.\n"));
		return(1);
	}

	/* make sure the per-ag freespace maps are ok so we can mount the fs */
	phase2(mp, phase2_threads);
	timestamp(PHASE_END, 2, NULL);

	if (do_prefetch)
		init_prefetch(mp);

	phase3(mp);
	timestamp(PHASE_END, 3, NULL);

	phase4(mp);
	timestamp(PHASE_END, 4, NULL);

	if (no_modify)
		printf(_("No modify flag set, skipping phase 5\n"));
	else {
		phase5(mp);
	}
	timestamp(PHASE_END, 5, NULL);

	/*
	 * Done with the block usage maps, toss them...
	 */
	free_bmaps(mp);

	if (!bad_ino_btree)  {
		phase6(mp);
		timestamp(PHASE_END, 6, NULL);

		phase7(mp);
		timestamp(PHASE_END, 7, NULL);
	} else  {
		do_warn(
_("Inode allocation btrees are too corrupted, skipping phases 6 and 7\n"));
	}

	if (lost_quotas && !have_uquotino && !have_gquotino)  {
		if (!no_modify)  {
			do_warn(
_("Warning:  no quota inodes were found.  Quotas disabled.\n"));
		} else  {
			do_warn(
_("Warning:  no quota inodes were found.  Quotas would be disabled.\n"));
		}
	} else if (lost_quotas)  {
		if (!no_modify)  {
			do_warn(
_("Warning:  quota inodes were cleared.  Quotas disabled.\n"));
		} else  {
			do_warn(
_("Warning:  quota inodes would be cleared.  Quotas would be disabled.\n"));
		}
	} else  {
		if (lost_uquotino)  {
			if (!no_modify)  {
				do_warn(
_("Warning:  user quota information was cleared.\n"
  "User quotas can not be enforced until limit information is recreated.\n"));
			} else  {
				do_warn(
_("Warning:  user quota information would be cleared.\n"
  "User quotas could not be enforced until limit information was recreated.\n"));
			}
		}

		if (lost_gquotino)  {
			if (!no_modify)  {
				do_warn(
_("Warning:  group quota information was cleared.\n"
  "Group quotas can not be enforced until limit information is recreated.\n"));
			} else  {
				do_warn(
_("Warning:  group quota information would be cleared.\n"
  "Group quotas could not be enforced until limit information was recreated.\n"));
			}
		}

		if (lost_pquotino)  {
			if (!no_modify)  {
				do_warn(
_("Warning:  project quota information was cleared.\n"
  "Project quotas can not be enforced until limit information is recreated.\n"));
			} else  {
				do_warn(
_("Warning:  project quota information would be cleared.\n"
  "Project quotas could not be enforced until limit information was recreated.\n"));
			}
		}
	}

	if (ag_stride && report_interval)
		stop_progress_rpt();

	if (no_modify)  {
		do_log(
	_("No modify flag set, skipping filesystem flush and exiting.\n"));
		if (verbose)
			summary_report();
		if (fs_is_dirty)
			return(1);

		return(0);
	}

	/*
	 * Clear the quota flags if they're on.
	 */
	sbp = libxfs_getsb(mp, 0);
	if (!sbp)
		do_error(_("couldn't get superblock\n"));

	dsb = XFS_BUF_TO_SBP(sbp);

	if (be16_to_cpu(dsb->sb_qflags) & (XFS_UQUOTA_CHKD | XFS_OQUOTA_CHKD)) {
		do_warn(_("Note - quota info will be regenerated on next "
			"quota mount.\n"));
		dsb->sb_qflags &= cpu_to_be16(~(XFS_UQUOTA_CHKD |
							XFS_OQUOTA_CHKD));
	}

	if (clear_sunit) {
		do_warn(
_("Note - stripe unit (%d) and width (%d) fields have been reset.\n"
  "Please set with mount -o sunit=<value>,swidth=<value>\n"),
			be32_to_cpu(dsb->sb_unit), be32_to_cpu(dsb->sb_width));
		dsb->sb_unit = 0;
		dsb->sb_width = 0;
	}

	libxfs_writebuf(sbp, 0);

	/*
	 * Done, flush all cached buffers and inodes.
	 */
	libxfs_bcache_flush();

	libxfs_umount(mp);
	if (x.rtdev)
		libxfs_device_close(x.rtdev);
	if (x.logdev && x.logdev != x.ddev)
		libxfs_device_close(x.logdev);
	libxfs_device_close(x.ddev);

	if (verbose)
		summary_report();
	do_log(_("done\n"));
	pftrace_done();

	return (0);
}