| /* |
| * Today's hack: quantum tunneling in structs |
| * |
| * 'entries' and 'term' are never anywhere referenced by word in code. In fact, |
| * they serve as the hanging-off data accessed through repl.data[]. |
| */ |
| |
| #define xt_alloc_initial_table(type, typ2) ({ \ |
| unsigned int hook_mask = info->valid_hooks; \ |
| unsigned int nhooks = hweight32(hook_mask); \ |
| unsigned int bytes = 0, hooknum = 0, i = 0; \ |
| struct { \ |
| struct type##_replace repl; \ |
| struct type##_standard entries[nhooks]; \ |
| struct type##_error term; \ |
| } *tbl = kzalloc(sizeof(*tbl), GFP_KERNEL); \ |
| if (tbl == NULL) \ |
| return NULL; \ |
| strncpy(tbl->repl.name, info->name, sizeof(tbl->repl.name)); \ |
| tbl->term = (struct type##_error)typ2##_ERROR_INIT; \ |
| tbl->repl.valid_hooks = hook_mask; \ |
| tbl->repl.num_entries = nhooks + 1; \ |
| tbl->repl.size = nhooks * sizeof(struct type##_standard) + \ |
| sizeof(struct type##_error); \ |
| for (; hook_mask != 0; hook_mask >>= 1, ++hooknum) { \ |
| if (!(hook_mask & 1)) \ |
| continue; \ |
| tbl->repl.hook_entry[hooknum] = bytes; \ |
| tbl->repl.underflow[hooknum] = bytes; \ |
| tbl->entries[i++] = (struct type##_standard) \ |
| typ2##_STANDARD_INIT(NF_ACCEPT); \ |
| bytes += sizeof(struct type##_standard); \ |
| } \ |
| tbl; \ |
| }) |
