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btrfs-progs: corrupt-block: convert help text to option formatter

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Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2023-02-22 00:39:14 +01:00
parent b1c159b804
commit 72463c23d2
1 changed files with 54 additions and 64 deletions
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118
btrfs-corrupt-block.c
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@ -33,6 +33,7 @@
#include "common/extent-cache.h"
#include "common/messages.h"
#include "common/string-utils.h"
#include "cmds/commands.h"
#define FIELD_BUF_LEN 80
@ -81,54 +82,43 @@ static int debug_corrupt_block(struct extent_buffer *eb,
return 0;
}
static void print_usage(int ret)
{
printf("usage: btrfs-corrupt-block [options] device\n");
printf("\n");
printf("Corrupt data structures on a btrfs filesystem. For testing only!\n");
printf("\n");
printf(" -l EXTENT\n");
printf(" --logical EXTENT logical extent to be corrupted\n");
printf(" -c COPY\n");
printf(" --copy COPY copy of the extent to be corrupted (usually 1 or 2, default: 0)\n");
printf(" -b COUNT\n");
printf(" --bytes COUNT number of bytes to be corrupted\n");
printf(" -e\n");
printf(" --extent-record corrupt the extent\n");
printf(" -E\n");
printf(" --extent-tree corrupt the whole extent tree\n");
printf(" -u\n");
printf(" --chunk-record corrupt the given chunk\n");
printf(" -U\n");
printf(" --chunk-tree corrupt the whole whole chunk tree\n");
printf(" -i INODE\n");
printf(" --inode INODE inode number to corrupt (must also specify the field to corrupt)\n");
printf(" -x EXTENT\n");
printf(" --file-extent EXTENT file extent item to corrupt (must also specify -i for the inode and -f for the field to corrupt)\n");
printf(" -m BLOCK\n");
printf(" --metadata-block BLOCK\n");
printf(" metadata block to corrupt (must also specify -f for the field to corrupt)\n");
printf(" -k\n");
printf(" --keys corrupt block keys (set by --logical)\n");
printf(" -K <u64,u8,u64>\n");
printf(" --key <u64,u8,u64> corrupt the given key (must also specify -f for the field and optionally -r for the root)\n");
printf(" -f FIELD\n");
printf(" --field FIELD field name in the item to corrupt\n");
printf(" -I\n");
printf(" --item corrupt an item corresponding to the passed key triplet (must also specify the field, or a (bytes, offset, value) tuple to corrupt and root for the item)\n");
printf(" -D\n");
printf(" --dir-item corrupt a dir item corresponding to the passed key triplet, must also specify a field\n");
printf(" -d\n");
printf(" --delete delete item corresponding to passed key triplet\n");
printf(" -r\n");
printf(" --root operate on this root\n");
printf(" -C BYTENR\n");
printf(" --csum BYTENR delete a csum for the specified bytenr. When used with -b it'll delete that many bytes, otherwise it's just sectorsize\n");
printf(" --block-group OFFSET corrupt the given block group\n");
printf(" --value VALUE value to use for corrupting item data\n");
printf(" --offset OFFSET offset to use for corrupting item data\n");
exit(ret);
}
static const char * const corrupt_block_usage[] = {
"btrfs-corrupt-block [options] device",
"Corrupt data structures on a btrfs filesystem. For testing only!",
"",
OPTLINE("-l|--logical EXTENT", "logical extent to be corrupted"),
OPTLINE("-c|--copy COPY", "copy of the extent to be corrupted (usually 1 or 2, default: 0)"),
OPTLINE("-b|--bytes COUNT", "number of bytes to be corrupted"),
OPTLINE("-e|--extent-record", "corrupt the extent"),
OPTLINE("-E|--extent-tree", "corrupt the whole extent tree"),
OPTLINE("-u|--chunk-record", "corrupt the given chunk"),
OPTLINE("-U|--chunk-tree", "corrupt the whole whole chunk tree"),
OPTLINE("-i|--inode INODE", "inode number to corrupt (must also specify the field to corrupt)"),
OPTLINE("-x|--file-extent EXTENT",
"file extent item to corrupt (must also specify -i for the inode and -f for the field to corrupt)"),
OPTLINE("-m|--metadata-block BLOCK",
"metadata block to corrupt (must also specify -f for the field to corrupt)"),
OPTLINE("-k|--keys"," corrupt block keys (set by --logical)"),
OPTLINE("-K|--key <u64,u8,u64>",
"corrupt the given key (must also specify -f for the field and optionally -r for the root)"),
OPTLINE("-f|--field FIELD", "field name in the item to corrupt"),
OPTLINE("-I|--item", "corrupt an item corresponding to the passed key triplet "
"(must also specify the field, or a (bytes, offset, value) tuple to corrupt and root for the item)"),
OPTLINE("-D|--dir-item",
"corrupt a dir item corresponding to the passed key triplet, must also specify a field"),
OPTLINE("-d|--delete", "delete item corresponding to passed key triplet"),
OPTLINE("-r|--root", "operate on this root"),
OPTLINE("-C|--csum BYTENR", "delete a csum for the specified bytenr. When used "
"with -b it'll delete that many bytes, otherwise it's just sectorsize"),
OPTLINE("--block-group OFFSET", "corrupt the given block group"),
OPTLINE("--value VALUE", "value to use for corrupting item data"),
OPTLINE("--offset OFFSET", "offset to use for corrupting item data"),
NULL
};
static const struct cmd_struct corrupt_block_cmd = {
.usagestr = corrupt_block_usage
};
static void corrupt_keys(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
@ -1267,7 +1257,7 @@ static void parse_key(u64 *objectid, u8 *type, u64 *offset)
int ret = sscanf(optarg, "%llu,%hhu,%llu", objectid, type, offset);
if (ret != 3) {
error("error parsing key '%s': %d", optarg, errno);
print_usage(1);
usage(&corrupt_block_cmd, 1);
}
}
@ -1285,7 +1275,7 @@ static struct btrfs_root *open_root(struct btrfs_fs_info *fs_info,
root = btrfs_read_fs_root(fs_info, &root_key);
if (IS_ERR(root)) {
error("couldn't find root %llu", root_objectid);
print_usage(1);
usage(&corrupt_block_cmd, 1);
}
return root;
@ -1429,7 +1419,7 @@ int main(int argc, char **argv)
break;
case GETOPT_VAL_HELP:
default:
print_usage(c != GETOPT_VAL_HELP);
usage(&corrupt_block_cmd, c != GETOPT_VAL_HELP);
}
}
set_argv0(argv);
@ -1452,7 +1442,7 @@ int main(int argc, char **argv)
struct btrfs_trans_handle *trans;
if (logical == (u64)-1)
print_usage(1);
usage(&corrupt_block_cmd, 1);
trans = btrfs_start_transaction(root, 1);
BUG_ON(IS_ERR(trans));
ret = corrupt_extent(trans, root, logical);
@ -1477,7 +1467,7 @@ int main(int argc, char **argv)
int del;
if (logical == (u64)-1)
print_usage(1);
usage(&corrupt_block_cmd, 1);
del = rand_range(3);
path = btrfs_alloc_path();
if (!path) {
@ -1514,7 +1504,7 @@ int main(int argc, char **argv)
struct btrfs_trans_handle *trans;
if (*field == 0)
print_usage(1);
usage(&corrupt_block_cmd, 1);
trans = btrfs_start_transaction(root, 1);
BUG_ON(IS_ERR(trans));
@ -1530,14 +1520,14 @@ int main(int argc, char **argv)
}
if (metadata_block) {
if (*field == 0)
print_usage(1);
usage(&corrupt_block_cmd, 1);
ret = corrupt_metadata_block(root->fs_info, metadata_block,
field);
goto out_close;
}
if (corrupt_di) {
if (!key.objectid || *field == 0)
print_usage(1);
usage(&corrupt_block_cmd, 1);
ret = corrupt_dir_item(target_root, &key, field);
goto out_close;
}
@ -1547,9 +1537,9 @@ int main(int argc, char **argv)
}
if (corrupt_item) {
if (!key.objectid)
print_usage(1);
usage(&corrupt_block_cmd, 1);
if (!root_objectid)
print_usage(1);
usage(&corrupt_block_cmd, 1);
if (*field != 0)
ret = corrupt_btrfs_item(target_root, &key, field);
@ -1560,26 +1550,26 @@ int main(int argc, char **argv)
bogus_offset, bytes,
bogus_value);
else
print_usage(1);
usage(&corrupt_block_cmd, 1);
goto out_close;
}
if (delete) {
if (!key.objectid)
print_usage(1);
usage(&corrupt_block_cmd, 1);
ret = delete_item(target_root, &key);
goto out_close;
}
if (should_corrupt_key) {
if (*field == 0)
print_usage(1);
usage(&corrupt_block_cmd, 1);
ret = corrupt_key(target_root, &key, field);
goto out_close;
}
if (block_group) {
if (*field == 0)
print_usage(1);
usage(&corrupt_block_cmd, 1);
ret = corrupt_block_group(root, block_group, field);
goto out_close;
}
@ -1588,10 +1578,10 @@ int main(int argc, char **argv)
* inode and we're screwed.
*/
if (file_extent != (u64)-1)
print_usage(1);
usage(&corrupt_block_cmd, 1);
if (logical == (u64)-1)
print_usage(1);
usage(&corrupt_block_cmd, 1);
if (bytes == 0)
bytes = root->fs_info->sectorsize;