diff options
| -rw-r--r-- | ctree.h | 6 | ||||
| -rw-r--r-- | mkfs.c | 29 |
2 files changed, 29 insertions, 6 deletions
@@ -111,6 +111,12 @@ struct btrfs_trans_handle; #define BTRFS_DEV_ITEMS_OBJECTID 1ULL /* + * the max metadata block size. This limit is somewhat artificial, + * but the memmove costs go through the roof for larger blocks. + */ +#define BTRFS_MAX_METADATA_BLOCKSIZE 65536 + +/* * we can actually store much bigger names, but lets not confuse the rest * of linux */ @@ -1201,6 +1201,27 @@ static int zero_output_file(int out_fd, u64 size, u32 sectorsize) return ret; } +static int check_leaf_or_node_size(u32 size, u32 sectorsize) +{ + if (size < sectorsize) { + fprintf(stderr, + "Illegal leafsize (or nodesize) %u (smaller than %u)\n", + size, sectorsize); + return -1; + } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) { + fprintf(stderr, + "Illegal leafsize (or nodesize) %u (larger than %u)\n", + size, BTRFS_MAX_METADATA_BLOCKSIZE); + return -1; + } else if (size & (sectorsize - 1)) { + fprintf(stderr, + "Illegal leafsize (or nodesize) %u (not align to %u)\n", + size, sectorsize); + return -1; + } + return 0; +} + int main(int ac, char **av) { char *file; @@ -1291,14 +1312,10 @@ int main(int ac, char **av) } } sectorsize = max(sectorsize, (u32)getpagesize()); - if (leafsize < sectorsize || (leafsize & (sectorsize - 1))) { - fprintf(stderr, "Illegal leafsize %u\n", leafsize); + if (check_leaf_or_node_size(leafsize, sectorsize)) exit(1); - } - if (nodesize < sectorsize || (nodesize & (sectorsize - 1))) { - fprintf(stderr, "Illegal nodesize %u\n", nodesize); + if (check_leaf_or_node_size(nodesize, sectorsize)) exit(1); - } ac = ac - optind; if (ac == 0) print_usage(); |