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3.1 ip_tables.c ±íµÄ×¢²á ipt_register_table
int ipt_register_table(struct ipt_table *table)
{
int ret;
struct ipt_table_info *newinfo;
static struct ipt_table_info bootstrap
= { 0, 0, 0, { 0 }, { 0 }, { } };
/*ºêMOD_INC_USE_COUNTÓÃÓÚÄ£¿é¼ÆÊýÆ÷ÀÛ¼Ó£¬Ö÷ÒªÊÇΪÁË·Àֹģ¿éÒ쳣ɾ³ý£¬¶ÔÓ¦µÄºêMOD_DEC_USE_COUNT¾ÍÊÇÀÛ¼õÁË*/
MOD_INC_USE_COUNT;
/*Ϊÿ¸öCPU·ÖÅä¹æÔò¿Õ¼ä*/
newinfo = vmalloc(sizeof(struct ipt_table_info)
+ SMP_ALIGN(table->table->size) * smp_num_cpus);
if (!newinfo) {
ret = -ENOMEM;
MOD_DEC_USE_COUNT;
return ret;
}
/*½«¹æÔòÏ±´µ½Ð±íÏîµÄµÚÒ»¸öcpu¿Õ¼äÀïÃæ*/
memcpy(newinfo->entries, table->table->entries, table->table->size);
/*translate_tableº¯Êý½«newinfo±íʾµÄtableµÄ¸÷¸ö¹æÔò½øÐб߽ç¼ì²é£¬È»ºó¶ÔÓÚnewinfoËùÖ¸µÄipt_talbe_info½á¹¹ÖеÄhook_entriesºÍunderflows¸³ÓèÕýÈ·µÄÖµ£¬×îºó½«±íÏîÏòÆäËûcpu¿½±´*/
ret = translate_table(table->name, table->valid_hooks,
&
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