From eaa93e3b0295fc94c774ec73056559a6b8c78b42 Mon Sep 17 00:00:00 2001 From: Alexander Fougner Date: Wed, 24 Feb 2016 11:52:33 +0100 Subject: btrfs-progs: introduce inspect-internal dump-super The long-term plan is to merge the features of standalone tools into the btrfs binary, reducing the number of shipped binaries. Signed-off-by: Alexander Fougner Signed-off-by: David Sterba --- btrfs-show-super.c | 520 +---------------------------------------------------- 1 file changed, 7 insertions(+), 513 deletions(-) (limited to 'btrfs-show-super.c') diff --git a/btrfs-show-super.c b/btrfs-show-super.c index 051bd115..3e2ceb58 100644 --- a/btrfs-show-super.c +++ b/btrfs-show-super.c @@ -16,527 +16,21 @@ * Boston, MA 021110-1307, USA. */ -#include -#include -#include -#include -#include -#include -#include -#include - -#include "kerncompat.h" -#include "ctree.h" -#include "disk-io.h" -#include "print-tree.h" -#include "transaction.h" -#include "list.h" #include "utils.h" -#include "crc32c.h" - -static void print_usage(void); -static void dump_superblock(struct btrfs_super_block *sb, int full); -int main(int argc, char **argv); -static int load_and_dump_sb(char *, int fd, u64 sb_bytenr, int full, int force); - - -static void print_usage(void) -{ - fprintf(stderr, - "usage: btrfs-show-super [-i super_mirror|-a|-f|-F] dev [dev..]\n"); - fprintf(stderr, "\t-f : print full superblock information\n"); - fprintf(stderr, "\t-a : print information of all superblocks\n"); - fprintf(stderr, "\t-i : specify which mirror to print out\n"); - fprintf(stderr, "\t-F : attempt to dump superblocks with bad magic\n"); - fprintf(stderr, "\t-s : specify alternate superblock offset\n"); - fprintf(stderr, "%s\n", PACKAGE_STRING); -} +#include "commands.h" +#include "cmds-inspect-dump-super.h" int main(int argc, char **argv) { - int opt; - int all = 0; - int full = 0; - int force = 0; - char *filename; - int fd = -1; - int i; - u64 arg; - u64 sb_bytenr = btrfs_sb_offset(0); - - while ((opt = getopt(argc, argv, "fFai:s:")) != -1) { - switch (opt) { - case 'i': - arg = arg_strtou64(optarg); - if (arg >= BTRFS_SUPER_MIRROR_MAX) { - fprintf(stderr, - "Illegal super_mirror %llu\n", - arg); - print_usage(); - exit(1); - } - sb_bytenr = btrfs_sb_offset(arg); - break; - case 'a': - all = 1; - break; - case 'f': - full = 1; - break; - case 'F': - force = 1; - break; - case 's': - sb_bytenr = arg_strtou64(optarg); - all = 0; - break; - default: - print_usage(); - exit(1); - } - } + int ret; set_argv0(argv); - if (check_argc_min(argc - optind, 1)) { - print_usage(); - exit(1); - } - - for (i = optind; i < argc; i++) { - filename = argv[i]; - fd = open(filename, O_RDONLY, 0666); - if (fd < 0) { - fprintf(stderr, "Could not open %s\n", filename); - exit(1); - } - - if (all) { - int idx; - for (idx = 0; idx < BTRFS_SUPER_MIRROR_MAX; idx++) { - sb_bytenr = btrfs_sb_offset(idx); - if (load_and_dump_sb(filename, fd, - sb_bytenr, full, force)) { - close(fd); - exit(1); - } - - putchar('\n'); - } - } else { - load_and_dump_sb(filename, fd, sb_bytenr, full, force); - putchar('\n'); - } - close(fd); - } - - exit(0); -} - -static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full, - int force) -{ - u8 super_block_data[BTRFS_SUPER_INFO_SIZE]; - struct btrfs_super_block *sb; - u64 ret; - - sb = (struct btrfs_super_block *)super_block_data; - - ret = pread64(fd, super_block_data, BTRFS_SUPER_INFO_SIZE, sb_bytenr); - if (ret != BTRFS_SUPER_INFO_SIZE) { - /* check if the disk if too short for further superblock */ - if (ret == 0 && errno == 0) - return 0; - - fprintf(stderr, - "ERROR: Failed to read the superblock on %s at %llu\n", - filename, (unsigned long long)sb_bytenr); - fprintf(stderr, - "ERROR: error = '%s', errno = %d\n", strerror(errno), errno); - return 1; - } - printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename); - printf("---------------------------------------------------------\n"); - if (btrfs_super_magic(sb) != BTRFS_MAGIC && !force) { - fprintf(stderr, - "ERROR: bad magic on superblock on %s at %llu\n", - filename, (unsigned long long)sb_bytenr); - } else { - dump_superblock(sb, full); - } - return 0; -} - -static int check_csum_sblock(void *sb, int csum_size) -{ - char result[BTRFS_CSUM_SIZE]; - u32 crc = ~(u32)0; - - crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, - crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); - btrfs_csum_final(crc, result); - - return !memcmp(sb, &result, csum_size); -} - -static void print_sys_chunk_array(struct btrfs_super_block *sb) -{ - struct extent_buffer *buf; - struct btrfs_disk_key *disk_key; - struct btrfs_chunk *chunk; - u8 *array_ptr; - unsigned long sb_array_offset; - u32 num_stripes; - u32 array_size; - u32 len = 0; - u32 cur_offset; - struct btrfs_key key; - int item; - - buf = malloc(sizeof(*buf) + sizeof(*sb)); - if (!buf) { - fprintf(stderr, "%s\n", strerror(ENOMEM)); - exit(1); - } - write_extent_buffer(buf, sb, 0, sizeof(*sb)); - array_size = btrfs_super_sys_array_size(sb); - - array_ptr = sb->sys_chunk_array; - sb_array_offset = offsetof(struct btrfs_super_block, sys_chunk_array); - cur_offset = 0; - item = 0; - - while (cur_offset < array_size) { - disk_key = (struct btrfs_disk_key *)array_ptr; - len = sizeof(*disk_key); - if (cur_offset + len > array_size) - goto out_short_read; - - btrfs_disk_key_to_cpu(&key, disk_key); - - array_ptr += len; - sb_array_offset += len; - cur_offset += len; - - printf("\titem %d ", item); - btrfs_print_key(disk_key); - putchar('\n'); - - if (key.type == BTRFS_CHUNK_ITEM_KEY) { - chunk = (struct btrfs_chunk *)sb_array_offset; - /* - * At least one btrfs_chunk with one stripe must be - * present, exact stripe count check comes afterwards - */ - len = btrfs_chunk_item_size(1); - if (cur_offset + len > array_size) - goto out_short_read; - - print_chunk(buf, chunk); - num_stripes = btrfs_chunk_num_stripes(buf, chunk); - if (!num_stripes) { - printk( - "ERROR: invalid number of stripes %u in sys_array at offset %u\n", - num_stripes, cur_offset); - break; - } - len = btrfs_chunk_item_size(num_stripes); - if (cur_offset + len > array_size) - goto out_short_read; - } else { - printk( - "ERROR: unexpected item type %u in sys_array at offset %u\n", - (u32)key.type, cur_offset); - break; - } - array_ptr += len; - sb_array_offset += len; - cur_offset += len; - - item++; - } - - free(buf); - return; - -out_short_read: - printk("ERROR: sys_array too short to read %u bytes at offset %u\n", - len, cur_offset); - free(buf); -} - -static int empty_backup(struct btrfs_root_backup *backup) -{ - if (backup == NULL || - (backup->tree_root == 0 && - backup->tree_root_gen == 0)) - return 1; - return 0; -} - -static void print_root_backup(struct btrfs_root_backup *backup) -{ - printf("\t\tbackup_tree_root:\t%llu\tgen: %llu\tlevel: %d\n", - btrfs_backup_tree_root(backup), - btrfs_backup_tree_root_gen(backup), - btrfs_backup_tree_root_level(backup)); - printf("\t\tbackup_chunk_root:\t%llu\tgen: %llu\tlevel: %d\n", - btrfs_backup_chunk_root(backup), - btrfs_backup_chunk_root_gen(backup), - btrfs_backup_chunk_root_level(backup)); - printf("\t\tbackup_extent_root:\t%llu\tgen: %llu\tlevel: %d\n", - btrfs_backup_extent_root(backup), - btrfs_backup_extent_root_gen(backup), - btrfs_backup_extent_root_level(backup)); - printf("\t\tbackup_fs_root:\t\t%llu\tgen: %llu\tlevel: %d\n", - btrfs_backup_fs_root(backup), - btrfs_backup_fs_root_gen(backup), - btrfs_backup_fs_root_level(backup)); - printf("\t\tbackup_dev_root:\t%llu\tgen: %llu\tlevel: %d\n", - btrfs_backup_dev_root(backup), - btrfs_backup_dev_root_gen(backup), - btrfs_backup_dev_root_level(backup)); - printf("\t\tbackup_csum_root:\t%llu\tgen: %llu\tlevel: %d\n", - btrfs_backup_csum_root(backup), - btrfs_backup_csum_root_gen(backup), - btrfs_backup_csum_root_level(backup)); - - printf("\t\tbackup_total_bytes:\t%llu\n", - btrfs_backup_total_bytes(backup)); - printf("\t\tbackup_bytes_used:\t%llu\n", - btrfs_backup_bytes_used(backup)); - printf("\t\tbackup_num_devices:\t%llu\n", - btrfs_backup_num_devices(backup)); - putchar('\n'); -} - -static void print_backup_roots(struct btrfs_super_block *sb) -{ - struct btrfs_root_backup *backup; - int i; - - for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { - backup = sb->super_roots + i; - if (!empty_backup(backup)) { - printf("\tbackup %d:\n", i); - print_root_backup(backup); - } - } -} - -struct readable_flag_entry { - u64 bit; - char *output; -}; - -#define DEF_INCOMPAT_FLAG_ENTRY(bit_name) \ - {BTRFS_FEATURE_INCOMPAT_##bit_name, #bit_name} - -static struct readable_flag_entry incompat_flags_array[] = { - DEF_INCOMPAT_FLAG_ENTRY(MIXED_BACKREF), - DEF_INCOMPAT_FLAG_ENTRY(DEFAULT_SUBVOL), - DEF_INCOMPAT_FLAG_ENTRY(MIXED_GROUPS), - DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZO), - DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZOv2), - DEF_INCOMPAT_FLAG_ENTRY(BIG_METADATA), - DEF_INCOMPAT_FLAG_ENTRY(EXTENDED_IREF), - DEF_INCOMPAT_FLAG_ENTRY(RAID56), - DEF_INCOMPAT_FLAG_ENTRY(SKINNY_METADATA), - DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES) -}; -static const int incompat_flags_num = sizeof(incompat_flags_array) / - sizeof(struct readable_flag_entry); - -#define DEF_HEADER_FLAG_ENTRY(bit_name) \ - {BTRFS_HEADER_FLAG_##bit_name, #bit_name} -#define DEF_SUPER_FLAG_ENTRY(bit_name) \ - {BTRFS_SUPER_FLAG_##bit_name, #bit_name} - -static struct readable_flag_entry super_flags_array[] = { - DEF_HEADER_FLAG_ENTRY(WRITTEN), - DEF_HEADER_FLAG_ENTRY(RELOC), - DEF_SUPER_FLAG_ENTRY(CHANGING_FSID), - DEF_SUPER_FLAG_ENTRY(SEEDING), - DEF_SUPER_FLAG_ENTRY(METADUMP), - DEF_SUPER_FLAG_ENTRY(METADUMP_V2) -}; -static const int super_flags_num = ARRAY_SIZE(super_flags_array); - -#define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\ - BTRFS_HEADER_FLAG_RELOC |\ - BTRFS_SUPER_FLAG_CHANGING_FSID |\ - BTRFS_SUPER_FLAG_SEEDING |\ - BTRFS_SUPER_FLAG_METADUMP |\ - BTRFS_SUPER_FLAG_METADUMP_V2) - -static void __print_readable_flag(u64 flag, struct readable_flag_entry *array, - int array_size, u64 supported_flags) -{ - int i; - int first = 1; - struct readable_flag_entry *entry; - - if (!flag) - return; - - printf("\t\t\t( "); - for (i = 0; i < array_size; i++) { - entry = array + i; - if (flag & entry->bit) { - if (first) - printf("%s ", entry->output); - else - printf("|\n\t\t\t %s ", entry->output); - first = 0; - } - } - flag &= ~supported_flags; - if (flag) { - if (first) - printf("unknown flag: 0x%llx ", flag); - else - printf("|\n\t\t\t unknown flag: 0x%llx ", flag); - } - printf(")\n"); -} - -static void print_readable_incompat_flag(u64 flag) -{ - return __print_readable_flag(flag, incompat_flags_array, - incompat_flags_num, - BTRFS_FEATURE_INCOMPAT_SUPP); -} - -static void print_readable_super_flag(u64 flag) -{ - return __print_readable_flag(flag, super_flags_array, - super_flags_num, BTRFS_SUPER_FLAG_SUPP); -} - -static void dump_superblock(struct btrfs_super_block *sb, int full) -{ - int i; - char *s, buf[BTRFS_UUID_UNPARSED_SIZE]; - u8 *p; - - printf("csum\t\t\t0x"); - for (i = 0, p = sb->csum; i < btrfs_super_csum_size(sb); i++) - printf("%02x", p[i]); - if (check_csum_sblock(sb, btrfs_super_csum_size(sb))) - printf(" [match]"); - else - printf(" [DON'T MATCH]"); - putchar('\n'); - - printf("bytenr\t\t\t%llu\n", - (unsigned long long)btrfs_super_bytenr(sb)); - printf("flags\t\t\t0x%llx\n", - (unsigned long long)btrfs_super_flags(sb)); - print_readable_super_flag(btrfs_super_flags(sb)); - - printf("magic\t\t\t"); - s = (char *) &sb->magic; - for (i = 0; i < 8; i++) - putchar(isprint(s[i]) ? s[i] : '.'); - if (btrfs_super_magic(sb) == BTRFS_MAGIC) - printf(" [match]\n"); - else - printf(" [DON'T MATCH]\n"); - - uuid_unparse(sb->fsid, buf); - printf("fsid\t\t\t%s\n", buf); - - printf("label\t\t\t"); - s = sb->label; - for (i = 0; i < BTRFS_LABEL_SIZE && s[i]; i++) - putchar(isprint(s[i]) ? s[i] : '.'); - putchar('\n'); - - printf("generation\t\t%llu\n", - (unsigned long long)btrfs_super_generation(sb)); - printf("root\t\t\t%llu\n", (unsigned long long)btrfs_super_root(sb)); - printf("sys_array_size\t\t%llu\n", - (unsigned long long)btrfs_super_sys_array_size(sb)); - printf("chunk_root_generation\t%llu\n", - (unsigned long long)btrfs_super_chunk_root_generation(sb)); - printf("root_level\t\t%llu\n", - (unsigned long long)btrfs_super_root_level(sb)); - printf("chunk_root\t\t%llu\n", - (unsigned long long)btrfs_super_chunk_root(sb)); - printf("chunk_root_level\t%llu\n", - (unsigned long long)btrfs_super_chunk_root_level(sb)); - printf("log_root\t\t%llu\n", - (unsigned long long)btrfs_super_log_root(sb)); - printf("log_root_transid\t%llu\n", - (unsigned long long)btrfs_super_log_root_transid(sb)); - printf("log_root_level\t\t%llu\n", - (unsigned long long)btrfs_super_log_root_level(sb)); - printf("total_bytes\t\t%llu\n", - (unsigned long long)btrfs_super_total_bytes(sb)); - printf("bytes_used\t\t%llu\n", - (unsigned long long)btrfs_super_bytes_used(sb)); - printf("sectorsize\t\t%llu\n", - (unsigned long long)btrfs_super_sectorsize(sb)); - printf("nodesize\t\t%llu\n", - (unsigned long long)btrfs_super_nodesize(sb)); - printf("leafsize\t\t%llu\n", - (unsigned long long)btrfs_super_leafsize(sb)); - printf("stripesize\t\t%llu\n", - (unsigned long long)btrfs_super_stripesize(sb)); - printf("root_dir\t\t%llu\n", - (unsigned long long)btrfs_super_root_dir(sb)); - printf("num_devices\t\t%llu\n", - (unsigned long long)btrfs_super_num_devices(sb)); - printf("compat_flags\t\t0x%llx\n", - (unsigned long long)btrfs_super_compat_flags(sb)); - printf("compat_ro_flags\t\t0x%llx\n", - (unsigned long long)btrfs_super_compat_ro_flags(sb)); - printf("incompat_flags\t\t0x%llx\n", - (unsigned long long)btrfs_super_incompat_flags(sb)); - print_readable_incompat_flag(btrfs_super_incompat_flags(sb)); - printf("csum_type\t\t%llu\n", - (unsigned long long)btrfs_super_csum_type(sb)); - printf("csum_size\t\t%llu\n", - (unsigned long long)btrfs_super_csum_size(sb)); - printf("cache_generation\t%llu\n", - (unsigned long long)btrfs_super_cache_generation(sb)); - printf("uuid_tree_generation\t%llu\n", - (unsigned long long)btrfs_super_uuid_tree_generation(sb)); - uuid_unparse(sb->dev_item.uuid, buf); - printf("dev_item.uuid\t\t%s\n", buf); + if (argc > 1 && !strcmp(argv[1], "--help")) + usage(cmd_inspect_dump_super_usage); - uuid_unparse(sb->dev_item.fsid, buf); - printf("dev_item.fsid\t\t%s %s\n", buf, - !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ? - "[match]" : "[DON'T MATCH]"); + ret = cmd_inspect_dump_super(argc, argv); - printf("dev_item.type\t\t%llu\n", (unsigned long long) - btrfs_stack_device_type(&sb->dev_item)); - printf("dev_item.total_bytes\t%llu\n", (unsigned long long) - btrfs_stack_device_total_bytes(&sb->dev_item)); - printf("dev_item.bytes_used\t%llu\n", (unsigned long long) - btrfs_stack_device_bytes_used(&sb->dev_item)); - printf("dev_item.io_align\t%u\n", (unsigned int) - btrfs_stack_device_io_align(&sb->dev_item)); - printf("dev_item.io_width\t%u\n", (unsigned int) - btrfs_stack_device_io_width(&sb->dev_item)); - printf("dev_item.sector_size\t%u\n", (unsigned int) - btrfs_stack_device_sector_size(&sb->dev_item)); - printf("dev_item.devid\t\t%llu\n", - btrfs_stack_device_id(&sb->dev_item)); - printf("dev_item.dev_group\t%u\n", (unsigned int) - btrfs_stack_device_group(&sb->dev_item)); - printf("dev_item.seek_speed\t%u\n", (unsigned int) - btrfs_stack_device_seek_speed(&sb->dev_item)); - printf("dev_item.bandwidth\t%u\n", (unsigned int) - btrfs_stack_device_bandwidth(&sb->dev_item)); - printf("dev_item.generation\t%llu\n", (unsigned long long) - btrfs_stack_device_generation(&sb->dev_item)); - if (full) { - printf("sys_chunk_array[%d]:\n", BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); - print_sys_chunk_array(sb); - printf("backup_roots[%d]:\n", BTRFS_NUM_BACKUP_ROOTS); - print_backup_roots(sb); - } + return ret; } -- cgit v1.2.3