mirror of
https://gitlab.isc.org/isc-projects/bind9
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a6 checkpoint
This commit is contained in:
Bob Halley
parent
5862cce82b
commit
fe14eafefa
253
lib/dns/adb.c
253
lib/dns/adb.c
@ -40,6 +40,7 @@
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#include <isc/random.h>
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#include <isc/timer.h>
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#include <dns/a6.h>
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#include <dns/adb.h>
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#include <dns/db.h>
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#include <dns/events.h>
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@ -66,6 +67,8 @@
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#define DNS_ADBENTRY_VALID(x) ISC_MAGIC_VALID(x, DNS_ADBENTRY_MAGIC)
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#define DNS_ADBFETCH_MAGIC 0x61644634 /* adF4. */
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#define DNS_ADBFETCH_VALID(x) ISC_MAGIC_VALID(x, DNS_ADBFETCH_MAGIC)
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#define DNS_ADBFETCH6_MAGIC 0x61644636 /* adF6. */
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#define DNS_ADBFETCH6_VALID(x) ISC_MAGIC_VALID(x, DNS_ADBFETCH6_MAGIC)
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/*
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* Lengths of lists needs to be small primes.
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@ -87,6 +90,7 @@ typedef ISC_LIST(dns_adbnamehook_t) dns_adbnamehooklist_t;
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typedef struct dns_adbzoneinfo dns_adbzoneinfo_t;
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typedef ISC_LIST(dns_adbentry_t) dns_adbentrylist_t;
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typedef struct dns_adbfetch dns_adbfetch_t;
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typedef struct dns_adbfetch6 dns_adbfetch6_t;
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struct dns_adb {
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unsigned int magic;
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@ -114,6 +118,7 @@ struct dns_adb {
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isc_mempool_t *ahmp; /* dns_adbfind_t */
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isc_mempool_t *aimp; /* dns_adbaddrinfo_t */
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isc_mempool_t *afmp; /* dns_adbfetch_t */
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isc_mempool_t *af6mp; /* dns_adbfetch6_t */
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isc_random_t rand;
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@ -149,11 +154,12 @@ struct dns_adbname {
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int lock_bucket;
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isc_stdtime_t expire_v4;
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isc_stdtime_t expire_v6;
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unsigned int chains;
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dns_adbnamehooklist_t v4;
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dns_adbnamehooklist_t v6;
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dns_adbfetch_t *fetch_a;
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dns_adbfetch_t *fetch_aaaa;
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ISC_LIST(dns_adbfetch_t) fetches_a6;
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ISC_LIST(dns_adbfetch6_t) fetches_a6;
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ISC_LIST(dns_adbfind_t) finds;
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ISC_LINK(dns_adbname_t) plink;
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};
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@ -166,6 +172,16 @@ struct dns_adbfetch {
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dns_rdataset_t rdataset;
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};
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struct dns_adbfetch6 {
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unsigned int magic;
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dns_adbnamehook_t *namehook;
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dns_adbentry_t *entry;
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dns_fetch_t *fetch;
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dns_rdataset_t rdataset;
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dns_a6context_t a6ctx;
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ISC_LINK(dns_adbfetch6_t) plink;
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};
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/*
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* dns_adbnamehook_t
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*
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@ -234,6 +250,8 @@ static inline dns_adbaddrinfo_t *new_adbaddrinfo(dns_adb_t *,
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static inline dns_adbfetch_t *new_adbfetch(dns_adb_t *);
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static inline void free_adbfetch(dns_adb_t *, dns_adbfetch_t **);
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static inline dns_adbfetch6_t *new_adbfetch6(dns_adb_t *, dns_a6context_t *);
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static inline void free_adbfetch6(dns_adb_t *, dns_adbfetch6_t **);
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static inline dns_adbname_t *find_name_and_lock(dns_adb_t *, dns_name_t *,
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int *);
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static inline dns_adbentry_t *find_entry_and_lock(dns_adb_t *,
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@ -268,6 +286,7 @@ static void shutdown_names(dns_adb_t *);
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static inline void link_name(dns_adb_t *, int, dns_adbname_t *);
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static inline void unlink_name(dns_adb_t *, dns_adbname_t *);
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static void kill_name(dns_adbname_t **, isc_eventtype_t ev);
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static void fetch_callback_a6(isc_task_t *task, isc_event_t *ev);
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#define FIND_EVENT_SENT 0x00000001
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#define FIND_EVENT_FREED 0x00000002
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@ -829,6 +848,7 @@ new_adbname(dns_adb_t *adb, dns_name_t *dnsname)
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name->dead = ISC_FALSE;
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name->expire_v4 = INT_MAX;
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name->expire_v6 = INT_MAX;
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name->chains = 0;
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name->lock_bucket = DNS_ADB_INVALIDBUCKET;
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ISC_LIST_INIT(name->v4);
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ISC_LIST_INIT(name->v6);
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@ -1087,6 +1107,129 @@ free_adbfetch(dns_adb_t *adb, dns_adbfetch_t **fetch)
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isc_mempool_put(adb->afmp, f);
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}
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/*
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* Caller must be holding the name lock.
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*/
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static isc_result_t
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a6find(void *arg, dns_name_t *a6name, dns_rdatatype_t type,
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dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset) {
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dns_adbname_t *name;
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dns_adb_t *adb;
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name = arg;
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INSIST(DNS_ADBNAME_VALID(name));
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adb = name->adb;
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INSIST(DNS_ADB_VALID(adb));
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/*
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* XXXRTH Cache 'now' in the name so we don't have to call
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* isc_stdtime_get() on every dns_view_find().
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*/
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return (dns_view_find(adb->view, a6name, type, 0, 0, ISC_FALSE,
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rdataset, sigrdataset));
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}
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/*
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* Caller must be holding the name lock.
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*/
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static void
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a6missing(dns_a6context_t *a6ctx, dns_name_t *a6name) {
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dns_adbname_t *name;
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dns_adb_t *adb;
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dns_adbfetch6_t *fetch;
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isc_result_t result;
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name = a6ctx->arg;
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INSIST(DNS_ADBNAME_VALID(name));
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adb = name->adb;
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INSIST(DNS_ADB_VALID(adb));
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fetch = new_adbfetch6(adb, a6ctx);
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if (fetch == NULL) {
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name->partial_result |= DNS_ADBFIND_INET6;
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return;
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}
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result = dns_resolver_createfetch(adb->view->resolver, a6name,
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dns_rdatatype_a6, NULL, NULL, NULL,
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0, adb->task, fetch_callback_a6,
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name, &fetch->rdataset, NULL,
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&fetch->fetch);
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if (result != ISC_R_SUCCESS) {
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free_adbfetch6(adb, &fetch);
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name->partial_result |= DNS_ADBFIND_INET6;
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return;
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}
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name->chains = a6ctx->chains;
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ISC_LIST_APPEND(name->fetches_a6, fetch, plink);
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}
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static inline dns_adbfetch6_t *
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new_adbfetch6(dns_adb_t *adb, dns_a6context_t *a6ctx)
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{
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dns_adbfetch6_t *f;
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f = isc_mempool_get(adb->af6mp);
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if (f == NULL)
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return (NULL);
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f->magic = 0;
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f->namehook = NULL;
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f->entry = NULL;
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f->fetch = NULL;
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f->namehook = new_adbnamehook(adb, NULL);
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if (f->namehook == NULL)
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goto err;
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f->entry = new_adbentry(adb);
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if (f->entry == NULL)
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goto err;
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dns_rdataset_init(&f->rdataset);
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if (a6ctx != NULL)
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dns_a6_copy(a6ctx, &f->a6ctx);
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else
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dns_a6_init(&f->a6ctx, a6find, NULL, /* import */ NULL,
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a6missing, f);
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f->magic = DNS_ADBFETCH6_MAGIC;
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return (f);
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err:
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if (f->namehook != NULL)
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free_adbnamehook(adb, &f->namehook);
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if (f->entry != NULL)
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free_adbentry(adb, &f->entry);
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isc_mempool_put(adb->af6mp, f);
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return (NULL);
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}
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static inline void
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free_adbfetch6(dns_adb_t *adb, dns_adbfetch6_t **fetch)
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{
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dns_adbfetch6_t *f;
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INSIST(fetch != NULL && DNS_ADBFETCH6_VALID(*fetch));
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f = *fetch;
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*fetch = NULL;
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f->magic = 0;
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if (f->namehook != NULL)
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free_adbnamehook(adb, &f->namehook);
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if (f->entry != NULL)
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free_adbentry(adb, &f->entry);
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if (dns_rdataset_isassociated(&f->rdataset))
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dns_rdataset_disassociate(&f->rdataset);
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isc_mempool_put(adb->af6mp, f);
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}
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static inline void
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free_adbfind(dns_adb_t *adb, dns_adbfind_t **findp)
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{
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@ -1586,6 +1729,7 @@ dns_adb_create(isc_mem_t *mem, dns_view_t *view, isc_timermgr_t *timermgr,
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MPINIT(dns_adbfind_t, adb->ahmp, ISC_TRUE, "adbfind");
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MPINIT(dns_adbaddrinfo_t, adb->aimp, ISC_TRUE, "adbaddrinfo");
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MPINIT(dns_adbfetch_t, adb->afmp, ISC_TRUE, "adbfetch");
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MPINIT(dns_adbfetch6_t, adb->af6mp, ISC_TRUE, "adbfetch6");
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#undef MPINIT
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@ -2529,6 +2673,7 @@ fetch_callback_v4(isc_task_t *task, isc_event_t *ev)
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return;
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}
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static void
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fetch_callback_aaaa(isc_task_t *task, isc_event_t *ev)
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{
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@ -2624,6 +2769,112 @@ fetch_callback_aaaa(isc_task_t *task, isc_event_t *ev)
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}
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static void
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fetch_callback_a6(isc_task_t *task, isc_event_t *ev)
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{
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dns_fetchevent_t *dev;
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dns_adbname_t *name;
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dns_adb_t *adb;
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dns_adbfetch6_t *fetch;
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int bucket;
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isc_eventtype_t ev_status;
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isc_stdtime_t now;
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isc_result_t result;
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(void)task;
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INSIST(ev->type == DNS_EVENT_FETCHDONE);
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dev = (dns_fetchevent_t *)ev;
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name = ev->arg;
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INSIST(DNS_ADBNAME_VALID(name));
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adb = name->adb;
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INSIST(DNS_ADB_VALID(adb));
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bucket = name->lock_bucket;
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LOCK(&adb->namelocks[bucket]);
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/* XXX INSIST(needs_poke == 0) */
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for (fetch = ISC_LIST_HEAD(name->fetches_a6);
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fetch != NULL;
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fetch = ISC_LIST_NEXT(fetch, plink))
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if (fetch->fetch == dev->fetch)
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break;
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INSIST(fetch != NULL);
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ISC_LIST_UNLINK(name->fetches_a6, fetch, plink);
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dns_resolver_destroyfetch(adb->view->resolver, &fetch->fetch);
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dev->fetch = NULL;
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/*
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* Cleanup things we don't care about.
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*/
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if (dev->node != NULL)
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dns_db_detachnode(dev->db, &dev->node);
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if (dev->db != NULL)
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dns_db_detach(&dev->db);
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/*
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* If this name is marked as dead, clean up, throwing away
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* potentially good data.
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*/
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if (name->dead) {
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isc_boolean_t decr_adbrefcnt;
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free_adbfetch6(adb, &fetch);
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isc_event_free(&ev);
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kill_name(&name, DNS_EVENT_ADBCANCELED);
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decr_adbrefcnt = ISC_FALSE;
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if (adb->name_sd[bucket] && (adb->name_refcnt[bucket] == 0))
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decr_adbrefcnt = ISC_TRUE;
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UNLOCK(&adb->namelocks[bucket]);
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if (decr_adbrefcnt)
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dec_adb_irefcnt(adb, ISC_TRUE);
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return;
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}
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/*
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* Did we get back junk? If so, and there are no more fetches
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* sitting out there, tell all the finds about it.
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*/
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if (dev->result != ISC_R_SUCCESS)
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goto out;
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/*
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* We got something potentially useful. Run the A6 chain
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* follower on this A6 rdataset.
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*/
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fetch->a6ctx.chains = name->chains;
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(void)dns_a6_foreach(&fetch->a6ctx, dev->rdataset);
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out:
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free_adbfetch6(adb, &fetch);
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isc_event_free(&ev);
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#ifdef notyet
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if (needs_poke)
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clean_finds_at_name(name, DNS_EVENT_ADBMOREADDRESSES,
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DNS_ADBFIND_INET6);
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else if (ISC_LIST_EMPTY(name->fetches_a6)) {
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clean_finds_at_name(name, DNS_EVENT_ADBNOMOREADDRESSES,
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DNS_ADBFIND_INET6);
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name->query_pending &= ~DNS_ADBFIND_INET6;
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}
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#endif
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/* XXX clear needs poke */
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UNLOCK(&adb->namelocks[bucket]);
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return;
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}
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static isc_result_t
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fetch_name_v4(dns_adbname_t *adbname, isc_stdtime_t now)
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{
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