From bddb8e0fd7b1502945772b2c4717def1ca30ea2e Mon Sep 17 00:00:00 2001 From: Gui Hecheng Date: Fri, 16 May 2014 09:23:37 +0800 Subject: btrfs-progs: add sys_chunk_array and backup roots info to show-super Add sys chunk array and backup roots info if the new option '-f' if specified. This may be useful for debugging sys_chunk related issues. Signed-off-by: Gui Hecheng Signed-off-by: David Sterba --- btrfs-show-super.c | 142 ++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 129 insertions(+), 13 deletions(-) (limited to 'btrfs-show-super.c') diff --git a/btrfs-show-super.c b/btrfs-show-super.c index d4df0ac..c2ad332 100644 --- a/btrfs-show-super.c +++ b/btrfs-show-super.c @@ -38,18 +38,18 @@ #include "crc32c.h" static void print_usage(void); -static void dump_superblock(struct btrfs_super_block *sb); +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); +static int load_and_dump_sb(char *, int fd, u64 sb_bytenr, int full); static void print_usage(void) { fprintf(stderr, - "usage: btrfs-show-super [-i super_mirror|-a] dev [dev..]\n"); - fprintf(stderr, "\tThe super_mirror number is between 0 and %d.\n", - BTRFS_SUPER_MIRROR_MAX - 1); - fprintf(stderr, "\tIf -a is passed all the superblocks are showed.\n"); + "usage: btrfs-show-super [-i super_mirror|-a|-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, "%s\n", BTRFS_BUILD_VERSION); } @@ -57,13 +57,14 @@ int main(int argc, char **argv) { int opt; int all = 0; + int full = 0; char *filename; int fd = -1; int i; u64 arg; u64 sb_bytenr = btrfs_sb_offset(0); - while ((opt = getopt(argc, argv, "ai:")) != -1) { + while ((opt = getopt(argc, argv, "fai:")) != -1) { switch (opt) { case 'i': arg = arg_strtou64(optarg); @@ -80,7 +81,9 @@ int main(int argc, char **argv) case 'a': all = 1; break; - + case 'f': + full = 1; + break; default: print_usage(); exit(1); @@ -104,7 +107,8 @@ int main(int argc, char **argv) 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)) { + if (load_and_dump_sb(filename, fd, + sb_bytenr, full)) { close(fd); exit(1); } @@ -112,7 +116,7 @@ int main(int argc, char **argv) putchar('\n'); } } else { - load_and_dump_sb(filename, fd, sb_bytenr); + load_and_dump_sb(filename, fd, sb_bytenr, full); putchar('\n'); } close(fd); @@ -121,7 +125,7 @@ int main(int argc, char **argv) exit(0); } -static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr) +static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full) { u8 super_block_data[BTRFS_SUPER_INFO_SIZE]; struct btrfs_super_block *sb; @@ -146,7 +150,7 @@ static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr) } printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename); printf("---------------------------------------------------------\n"); - dump_superblock(sb); + dump_superblock(sb, full); return 0; } @@ -162,7 +166,113 @@ static int check_csum_sblock(void *sb, int csum_size) return !memcmp(sb, &result, csum_size); } -static void dump_superblock(struct btrfs_super_block *sb) +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; + struct btrfs_key key; + u8 *ptr, *array_end; + u32 num_stripes; + u32 len = 0; + int i = 0; + + buf = malloc(sizeof(*buf) + sizeof(*sb)); + if (!buf) { + fprintf(stderr, "%s\n", strerror(ENOMEM)); + exit(1); + } + write_extent_buffer(buf, sb, 0, sizeof(*sb)); + ptr = sb->sys_chunk_array; + array_end = ptr + btrfs_super_sys_array_size(sb); + + while (ptr < array_end) { + disk_key = (struct btrfs_disk_key *)ptr; + btrfs_disk_key_to_cpu(&key, disk_key); + + printf("\titem %d ", i); + btrfs_print_key(disk_key); + + len = sizeof(*disk_key); + putchar('\n'); + ptr += len; + + if (key.type == BTRFS_CHUNK_ITEM_KEY) { + chunk = (struct btrfs_chunk *)(ptr - (u8 *)sb); + print_chunk(buf, chunk); + num_stripes = btrfs_chunk_num_stripes(buf, chunk); + len = btrfs_chunk_item_size(num_stripes); + } else { + BUG(); + } + + ptr += len; + i++; + } + + 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); + } + } +} + +static void dump_superblock(struct btrfs_super_block *sb, int full) { int i; char *s, buf[BTRFS_UUID_UNPARSED_SIZE]; @@ -280,4 +390,10 @@ static void dump_superblock(struct btrfs_super_block *sb) 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); + } } -- cgit v1.2.1