mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-13 09:57:03 +00:00
1ecefced86
we use 37 as the allocation size to hold the uuid_unparse, here it defines BTRFS_UUID_UNPARSE_SIZE for the same. Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
284 lines
8.3 KiB
C
284 lines
8.3 KiB
C
/*
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* Copyright (C) 2012 STRATO AG. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#define _XOPEN_SOURCE 500
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#define _GNU_SOURCE 1
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <uuid/uuid.h>
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#include <errno.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "disk-io.h"
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#include "print-tree.h"
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#include "transaction.h"
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#include "list.h"
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#include "version.h"
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#include "utils.h"
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#include "crc32c.h"
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static void print_usage(void);
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static void dump_superblock(struct btrfs_super_block *sb);
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int main(int argc, char **argv);
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static int load_and_dump_sb(char *, int fd, u64 sb_bytenr);
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static void print_usage(void)
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{
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fprintf(stderr,
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"usage: btrfs-show-super [-i super_mirror|-a] dev [dev..]\n");
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fprintf(stderr, "\tThe super_mirror number is between 0 and %d.\n",
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BTRFS_SUPER_MIRROR_MAX - 1);
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fprintf(stderr, "\tIf -a is passed all the superblocks are showed.\n");
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fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
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}
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int main(int argc, char **argv)
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{
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int opt;
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int all = 0;
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char *filename;
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int fd = -1;
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int arg, i;
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u64 sb_bytenr = btrfs_sb_offset(0);
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while ((opt = getopt(argc, argv, "ai:")) != -1) {
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switch (opt) {
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case 'i':
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arg = atoi(optarg);
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if (arg < 0 || arg >= BTRFS_SUPER_MIRROR_MAX) {
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fprintf(stderr,
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"Illegal super_mirror %d\n",
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arg);
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print_usage();
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exit(1);
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}
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sb_bytenr = btrfs_sb_offset(arg);
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break;
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case 'a':
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all = 1;
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break;
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default:
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print_usage();
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exit(1);
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}
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}
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if (argc < optind + 1) {
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print_usage();
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exit(1);
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}
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for (i = optind; i < argc; i++) {
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filename = argv[i];
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fd = open(filename, O_RDONLY, 0666);
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if (fd < 0) {
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fprintf(stderr, "Could not open %s\n", filename);
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exit(1);
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}
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if (all) {
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int idx;
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for (idx = 0; idx < BTRFS_SUPER_MIRROR_MAX; idx++) {
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sb_bytenr = btrfs_sb_offset(idx);
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if (load_and_dump_sb(filename, fd, sb_bytenr)) {
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close(fd);
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exit(1);
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}
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putchar('\n');
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}
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} else {
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load_and_dump_sb(filename, fd, sb_bytenr);
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putchar('\n');
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}
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close(fd);
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}
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exit(0);
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}
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static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr)
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{
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u8 super_block_data[BTRFS_SUPER_INFO_SIZE];
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struct btrfs_super_block *sb;
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u64 ret;
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sb = (struct btrfs_super_block *)super_block_data;
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ret = pread64(fd, super_block_data, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
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if (ret != BTRFS_SUPER_INFO_SIZE) {
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int e = errno;
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/* check if the disk if too short for further superblock */
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if (ret == 0 && e == 0)
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return 0;
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fprintf(stderr,
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"ERROR: Failed to read the superblock on %s at %llu\n",
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filename, (unsigned long long)sb_bytenr);
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fprintf(stderr,
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"ERROR: error = '%s', errno = %d\n", strerror(e), e);
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return 1;
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}
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printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename);
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printf("---------------------------------------------------------\n");
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dump_superblock(sb);
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return 0;
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}
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static int check_csum_sblock(void *sb, int csum_size)
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{
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char result[BTRFS_CSUM_SIZE];
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u32 crc = ~(u32)0;
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crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE,
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crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
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btrfs_csum_final(crc, result);
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return !memcmp(sb, &result, csum_size);
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}
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static void dump_superblock(struct btrfs_super_block *sb)
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{
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int i;
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char *s, buf[BTRFS_UUID_UNPARSED_SIZE];
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u8 *p;
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printf("csum\t\t\t0x");
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for (i = 0, p = sb->csum; i < btrfs_super_csum_size(sb); i++)
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printf("%02x", p[i]);
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if (check_csum_sblock(sb, btrfs_super_csum_size(sb)))
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printf(" [match]");
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else
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printf(" [DON'T MATCH]");
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putchar('\n');
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printf("bytenr\t\t\t%llu\n",
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(unsigned long long)btrfs_super_bytenr(sb));
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printf("flags\t\t\t0x%llx\n",
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(unsigned long long)btrfs_super_flags(sb));
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printf("magic\t\t\t");
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s = (char *) &sb->magic;
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for (i = 0; i < 8; i++)
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putchar(isprint(s[i]) ? s[i] : '.');
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if (btrfs_super_magic(sb) == BTRFS_MAGIC)
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printf(" [match]\n");
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else
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printf(" [DON'T MATCH]\n");
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uuid_unparse(sb->fsid, buf);
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printf("fsid\t\t\t%s\n", buf);
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printf("label\t\t\t");
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s = sb->label;
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for (i = 0; i < BTRFS_LABEL_SIZE && s[i]; i++)
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putchar(isprint(s[i]) ? s[i] : '.');
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putchar('\n');
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printf("generation\t\t%llu\n",
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(unsigned long long)btrfs_super_generation(sb));
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printf("root\t\t\t%llu\n", (unsigned long long)btrfs_super_root(sb));
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printf("sys_array_size\t\t%llu\n",
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(unsigned long long)btrfs_super_sys_array_size(sb));
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printf("chunk_root_generation\t%llu\n",
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(unsigned long long)btrfs_super_chunk_root_generation(sb));
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printf("root_level\t\t%llu\n",
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(unsigned long long)btrfs_super_root_level(sb));
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printf("chunk_root\t\t%llu\n",
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(unsigned long long)btrfs_super_chunk_root(sb));
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printf("chunk_root_level\t%llu\n",
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(unsigned long long)btrfs_super_chunk_root_level(sb));
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printf("log_root\t\t%llu\n",
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(unsigned long long)btrfs_super_log_root(sb));
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printf("log_root_transid\t%llu\n",
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(unsigned long long)btrfs_super_log_root_transid(sb));
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printf("log_root_level\t\t%llu\n",
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(unsigned long long)btrfs_super_log_root_level(sb));
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printf("total_bytes\t\t%llu\n",
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(unsigned long long)btrfs_super_total_bytes(sb));
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printf("bytes_used\t\t%llu\n",
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(unsigned long long)btrfs_super_bytes_used(sb));
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printf("sectorsize\t\t%llu\n",
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(unsigned long long)btrfs_super_sectorsize(sb));
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printf("nodesize\t\t%llu\n",
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(unsigned long long)btrfs_super_nodesize(sb));
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printf("leafsize\t\t%llu\n",
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(unsigned long long)btrfs_super_leafsize(sb));
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printf("stripesize\t\t%llu\n",
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(unsigned long long)btrfs_super_stripesize(sb));
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printf("root_dir\t\t%llu\n",
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(unsigned long long)btrfs_super_root_dir(sb));
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printf("num_devices\t\t%llu\n",
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(unsigned long long)btrfs_super_num_devices(sb));
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printf("compat_flags\t\t0x%llx\n",
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(unsigned long long)btrfs_super_compat_flags(sb));
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printf("compat_ro_flags\t\t0x%llx\n",
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(unsigned long long)btrfs_super_compat_ro_flags(sb));
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printf("incompat_flags\t\t0x%llx\n",
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(unsigned long long)btrfs_super_incompat_flags(sb));
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printf("csum_type\t\t%llu\n",
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(unsigned long long)btrfs_super_csum_type(sb));
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printf("csum_size\t\t%llu\n",
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(unsigned long long)btrfs_super_csum_size(sb));
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printf("cache_generation\t%llu\n",
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(unsigned long long)btrfs_super_cache_generation(sb));
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printf("uuid_tree_generation\t%llu\n",
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(unsigned long long)btrfs_super_uuid_tree_generation(sb));
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uuid_unparse(sb->dev_item.uuid, buf);
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printf("dev_item.uuid\t\t%s\n", buf);
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uuid_unparse(sb->dev_item.fsid, buf);
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printf("dev_item.fsid\t\t%s %s\n", buf,
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!memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ?
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"[match]" : "[DON'T MATCH]");
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printf("dev_item.type\t\t%llu\n", (unsigned long long)
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btrfs_stack_device_type(&sb->dev_item));
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printf("dev_item.total_bytes\t%llu\n", (unsigned long long)
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btrfs_stack_device_total_bytes(&sb->dev_item));
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printf("dev_item.bytes_used\t%llu\n", (unsigned long long)
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btrfs_stack_device_bytes_used(&sb->dev_item));
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printf("dev_item.io_align\t%u\n", (unsigned int)
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btrfs_stack_device_io_align(&sb->dev_item));
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printf("dev_item.io_width\t%u\n", (unsigned int)
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btrfs_stack_device_io_width(&sb->dev_item));
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printf("dev_item.sector_size\t%u\n", (unsigned int)
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btrfs_stack_device_sector_size(&sb->dev_item));
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printf("dev_item.devid\t\t%llu\n",
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btrfs_stack_device_id(&sb->dev_item));
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printf("dev_item.dev_group\t%u\n", (unsigned int)
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btrfs_stack_device_group(&sb->dev_item));
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printf("dev_item.seek_speed\t%u\n", (unsigned int)
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btrfs_stack_device_seek_speed(&sb->dev_item));
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printf("dev_item.bandwidth\t%u\n", (unsigned int)
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btrfs_stack_device_bandwidth(&sb->dev_item));
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printf("dev_item.generation\t%llu\n", (unsigned long long)
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btrfs_stack_device_generation(&sb->dev_item));
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}
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