Add three helper function to manage tables from external modules.
ipfw_objhash_lookup_table_kidx does lookup kernel index of table; ipfw_ref_table/ipfw_unref_table takes and releases reference to table. Obtained from: Yandex LLC Sponsored by: Yandex LLC
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=304043
@ -743,8 +743,12 @@ typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen,
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int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr,
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uint32_t *val);
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int ipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen,
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void *paddr, uint32_t *val);
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int ipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl,
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uint16_t plen, void *paddr, uint32_t *val);
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struct named_object *ipfw_objhash_lookup_table_kidx(struct ip_fw_chain *ch,
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uint16_t kidx);
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int ipfw_ref_table(struct ip_fw_chain *ch, ipfw_obj_ntlv *ntlv, uint16_t *kidx);
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void ipfw_unref_table(struct ip_fw_chain *ch, uint16_t kidx);
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int ipfw_init_tables(struct ip_fw_chain *ch, int first);
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int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables);
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int ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int nsets);
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@ -1601,6 +1601,57 @@ ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables)
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return (0);
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}
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/*
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* Lookup table's named object by its @kidx.
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*/
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struct named_object *
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ipfw_objhash_lookup_table_kidx(struct ip_fw_chain *ch, uint16_t kidx)
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{
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return (ipfw_objhash_lookup_kidx(CHAIN_TO_NI(ch), kidx));
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}
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/*
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* Take reference to table specified in @ntlv.
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* On success return its @kidx.
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*/
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int
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ipfw_ref_table(struct ip_fw_chain *ch, ipfw_obj_ntlv *ntlv, uint16_t *kidx)
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{
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struct tid_info ti;
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struct table_config *tc;
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int error;
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IPFW_UH_WLOCK_ASSERT(ch);
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ntlv_to_ti(ntlv, &ti);
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error = find_table_err(CHAIN_TO_NI(ch), &ti, &tc);
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if (error != 0)
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return (error);
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if (tc == NULL)
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return (ESRCH);
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tc_ref(tc);
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*kidx = tc->no.kidx;
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return (0);
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}
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void
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ipfw_unref_table(struct ip_fw_chain *ch, uint16_t kidx)
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{
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struct namedobj_instance *ni;
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struct named_object *no;
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IPFW_UH_WLOCK_ASSERT(ch);
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ni = CHAIN_TO_NI(ch);
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no = ipfw_objhash_lookup_kidx(ni, kidx);
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KASSERT(no != NULL, ("Table with index %d not found", kidx));
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no->refcnt--;
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}
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/*
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* Lookup an IP @addr in table @tbl.
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* Stores found value in @val.
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