diff options
Diffstat (limited to 'meta/recipes-devtools/btrfs-tools/btrfs-tools/upstream-tmp/0001-Btrfs-progs-add-a-btrfs-select-super-command-to-over.patch')
| -rw-r--r-- | meta/recipes-devtools/btrfs-tools/btrfs-tools/upstream-tmp/0001-Btrfs-progs-add-a-btrfs-select-super-command-to-over.patch | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/meta/recipes-devtools/btrfs-tools/btrfs-tools/upstream-tmp/0001-Btrfs-progs-add-a-btrfs-select-super-command-to-over.patch b/meta/recipes-devtools/btrfs-tools/btrfs-tools/upstream-tmp/0001-Btrfs-progs-add-a-btrfs-select-super-command-to-over.patch new file mode 100644 index 0000000000..2102f08e96 --- /dev/null +++ b/meta/recipes-devtools/btrfs-tools/btrfs-tools/upstream-tmp/0001-Btrfs-progs-add-a-btrfs-select-super-command-to-over.patch @@ -0,0 +1,170 @@ +Upstream-Status: Inappropriate [Backport] +From 70c6c10134b502fa69955746554031939b85fb0c Mon Sep 17 00:00:00 2001 +From: Chris Mason <chris.mason@oracle.com> +Date: Thu, 9 Dec 2010 16:36:29 -0500 +Subject: [PATCH 01/15] Btrfs-progs: add a btrfs-select-super command to overwrite the super + +Btrfs stores multiple copies of the superblock, and for common power-failure +crashes where barriers were not in use, one of the super copies is often +valid while the first copy is not. + +This adds a btrfs-select-super -s N /dev/xxx command, which can +overwrite all the super blocks with a copy that you have already +determined is valid with btrfsck -s + +Signed-off-by: Chris Mason <chris.mason@oracle.com> +--- + Makefile | 3 ++ + btrfs-select-super.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++ + disk-io.c | 2 +- + disk-io.h | 1 + + 4 files changed, 104 insertions(+), 1 deletions(-) + create mode 100644 btrfs-select-super.c + +diff --git a/Makefile b/Makefile +index 6e6f6c6..d65f6a2 100644 +--- a/Makefile ++++ b/Makefile +@@ -62,6 +62,9 @@ btrfs-debug-tree: $(objects) debug-tree.o + btrfs-zero-log: $(objects) btrfs-zero-log.o + gcc $(CFLAGS) -o btrfs-zero-log $(objects) btrfs-zero-log.o $(LDFLAGS) $(LIBS) + ++btrfs-select-super: $(objects) btrfs-select-super.o ++ gcc $(CFLAGS) -o btrfs-select-super $(objects) btrfs-select-super.o $(LDFLAGS) $(LIBS) ++ + btrfstune: $(objects) btrfstune.o + gcc $(CFLAGS) -o btrfstune $(objects) btrfstune.o $(LDFLAGS) $(LIBS) + +diff --git a/btrfs-select-super.c b/btrfs-select-super.c +new file mode 100644 +index 0000000..f12f36c +--- /dev/null ++++ b/btrfs-select-super.c +@@ -0,0 +1,99 @@ ++/* ++ * 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-select-super -s number dev\n"); ++ fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION); ++ exit(1); ++} ++ ++int main(int ac, char **av) ++{ ++ struct btrfs_root *root; ++ int ret; ++ int num; ++ u64 bytenr = 0; ++ ++ while(1) { ++ int c; ++ c = getopt(ac, av, "s:"); ++ if (c < 0) ++ break; ++ switch(c) { ++ case 's': ++ num = atol(optarg); ++ bytenr = btrfs_sb_offset(num); ++ printf("using SB copy %d, bytenr %llu\n", num, ++ (unsigned long long)bytenr); ++ break; ++ default: ++ print_usage(); ++ } ++ } ++ ac = ac - optind; ++ ++ if (ac != 1) ++ print_usage(); ++ ++ if (bytenr == 0) { ++ fprintf(stderr, "Please select the super copy with -s\n"); ++ print_usage(); ++ } ++ ++ radix_tree_init(); ++ ++ if((ret = check_mounted(av[optind])) < 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[optind]); ++ return -EBUSY; ++ } ++ ++ root = open_ctree(av[optind], bytenr, 1); ++ ++ if (root == NULL) ++ return 1; ++ ++ /* make the super writing code think we've read the first super */ ++ root->fs_info->super_bytenr = BTRFS_SUPER_INFO_OFFSET; ++ ret = write_all_supers(root); ++ ++ /* we don't close the ctree or anything, because we don't want a real ++ * transaction commit. We just want the super copy we pulled off the ++ * disk to overwrite all the other copies ++ */ ++ return ret; ++} +diff --git a/disk-io.c b/disk-io.c +index a6e1000..5bd9cfc 100644 +--- a/disk-io.c ++++ b/disk-io.c +@@ -828,7 +828,7 @@ int write_dev_supers(struct btrfs_root *root, struct btrfs_super_block *sb, + + if (root->fs_info->super_bytenr != BTRFS_SUPER_INFO_OFFSET) { + btrfs_set_super_bytenr(sb, root->fs_info->super_bytenr); +- ++printk("speiiiiiiiiiiiiiiiiiiiiiiiiiiiii\n"); + crc = ~(u32)0; + crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc, + BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); +diff --git a/disk-io.h b/disk-io.h +index 49e5692..7ebec24 100644 +--- a/disk-io.h ++++ b/disk-io.h +@@ -47,6 +47,7 @@ struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes); + struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr, + int writes); + int close_ctree(struct btrfs_root *root); ++int write_all_supers(struct btrfs_root *root); + int write_ctree_super(struct btrfs_trans_handle *trans, + struct btrfs_root *root); + int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr); +-- +1.7.2.3 + |