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btrfs-progs
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Add rescue command to zero the log 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-10-05 10:14:48 -04:00
parent 8c43a9adf7
commit 0f49c426fb
2 changed files with 72 additions and 0 deletions
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3
Makefile
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@ -59,6 +59,9 @@ mkfs.btrfs: $(objects) mkfs.o
btrfs-debug-tree: $(objects) debug-tree.o
gcc $(CFLAGS) -o btrfs-debug-tree $(objects) debug-tree.o $(LDFLAGS) $(LIBS)
btrfs-zero-log: $(objects) btrfs-zero-log.o
gcc $(CFLAGS) -o btrfs-zero-log $(objects) btrfs-zero-log.o $(LDFLAGS) $(LIBS)
btrfstune: $(objects) btrfstune.o
gcc $(CFLAGS) -o btrfstune $(objects) btrfstune.o $(LDFLAGS) $(LIBS)

69
btrfs-zero-log.c Normal file
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@ -0,0 +1,69 @@
/*
* Copyright (C) 2007 Oracle. 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 v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will 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 to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#define _XOPEN_SOURCE 500
#define _GNU_SOURCE 1
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "kerncompat.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"
#include "transaction.h"
#include "list.h"
#include "version.h"
#include "utils.h"
static void print_usage(void)
{
fprintf(stderr, "usage: btrfs-zero-log dev\n");
fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
exit(1);
}
int main(int ac, char **av)
{
struct btrfs_root *root;
int ret;
if (ac != 2)
print_usage();
radix_tree_init();
if((ret = check_mounted(av[1])) < 0) {
fprintf(stderr, "Could not check mount status: %s\n", strerror(ret));
return ret;
} else if(ret) {
fprintf(stderr, "%s is currently mounted. Aborting.\n", av[1]);
return -EBUSY;
}
root = open_ctree(av[1], 0, 1);
if (root == NULL)
return 1;
btrfs_set_super_log_root(&root->fs_info->super_copy, 0);
btrfs_set_super_log_root_level(&root->fs_info->super_copy, 0);
close_ctree(root);
return ret;
}