libsmb/conncache.c

ソースコードを見る。

データ構造
struct	failed_connection_cache
関数
NTSTATUS	check_negative_conn_cache_timeout (const char *domain, const char *server, unsigned int failed_cache_timeout)
NTSTATUS	check_negative_conn_cache (const char *domain, const char *server)
void	add_failed_connection_entry (const char *domain, const char *server, NTSTATUS result)
void	flush_negative_conn_cache (void)
void	flush_negative_conn_cache_for_domain (const char *domain)
変数
static struct failed_connection_cache *	failed_connection_cache

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関数

NTSTATUS check_negative_conn_cache_timeout	(	const char *	domain,
		const char *	server,
		unsigned int	failed_cache_timeout
	)

conncache.c の 51 行で定義されています。

参照先 failed_connection_cache::controller・failed_connection_cache::domain_name・failed_connection_cache・failed_connection_cache::lookup_time・failed_connection_cache::next・result・strequal().

参照元 check_negative_conn_cache().

{
        struct failed_connection_cache *fcc;
        NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
        
        /* can't check if we don't have strings */
        
        if ( !domain || !server )
                return NT_STATUS_OK;

        for (fcc = failed_connection_cache; fcc; fcc = fcc->next) {
        
                if (!(strequal(domain, fcc->domain_name) && strequal(server, fcc->controller))) {
                        continue; /* no match; check the next entry */
                }
                
                /* we have a match so see if it is still current */
                if (failed_cache_timeout != (unsigned int)-1) {
                        if (failed_cache_timeout == 0 ||
                                        (time(NULL) - fcc->lookup_time) > (time_t)failed_cache_timeout) {
                                /* Cache entry has expired, delete it */

                                DEBUG(10, ("check_negative_conn_cache: cache entry expired for %s, %s\n", 
                                        domain, server ));

                                DLIST_REMOVE(failed_connection_cache, fcc);
                                SAFE_FREE(fcc);

                                return NT_STATUS_OK;
                        }
                }

                /* The timeout hasn't expired yet so return false */

                DEBUG(10, ("check_negative_conn_cache: returning negative entry for %s, %s\n", 
                        domain, server ));

                result = fcc->nt_status;
                return result;
        }

        /* end of function means no cache entry */      
        return NT_STATUS_OK;
}

NTSTATUS check_negative_conn_cache	(	const char *	domain,
		const char *	server
	)

conncache.c の 96 行で定義されています。

参照先 check_negative_conn_cache_timeout().

参照元 add_one_dc_unique()・ads_find_dc()・cm_open_connection()・get_dc_list()・rpc_dc_name().

{
        return check_negative_conn_cache_timeout(domain, server, FAILED_CONNECTION_CACHE_TIMEOUT);
}

void add_failed_connection_entry	(	const char *	domain,
		const char *	server,
		NTSTATUS	result
	)

conncache.c の 106 行で定義されています。

参照先 failed_connection_cache::controller・failed_connection_cache::domain_name・failed_connection_cache・failed_connection_cache::lookup_time・failed_connection_cache::next・result・strequal().

参照元 ads_find_dc()・winbind_add_failed_connection_entry().

{
        struct failed_connection_cache *fcc;

        SMB_ASSERT(!NT_STATUS_IS_OK(result));

        /* Check we already aren't in the cache.  We always have to have 
           a domain, but maybe not a specific DC name. */

        for (fcc = failed_connection_cache; fcc; fcc = fcc->next) {                     
                if ( strequal(fcc->domain_name, domain) && strequal(fcc->controller, server) ) {
                        DEBUG(10, ("add_failed_connection_entry: domain %s (%s) already tried and failed\n",
                                   domain, server ));
                        /* Update the failed time. */
                        fcc->lookup_time = time(NULL);
                        return;
                }
        }

        /* Create negative lookup cache entry for this domain and controller */

        if ( !(fcc = SMB_MALLOC_P(struct failed_connection_cache)) ) {
                DEBUG(0, ("malloc failed in add_failed_connection_entry!\n"));
                return;
        }
        
        ZERO_STRUCTP(fcc);
        
        fstrcpy( fcc->domain_name, domain );
        fstrcpy( fcc->controller, server );
        fcc->lookup_time = time(NULL);
        fcc->nt_status = result;
        
        DEBUG(10,("add_failed_connection_entry: added domain %s (%s) to failed conn cache\n",
                domain, server ));
        
        DLIST_ADD(failed_connection_cache, fcc);
}

void flush_negative_conn_cache

(

void

)

conncache.c の 148 行で定義されています。

参照先 failed_connection_cache::next.

{
        struct failed_connection_cache *fcc;
        
        fcc = failed_connection_cache;

        while (fcc) {
                struct failed_connection_cache *fcc_next;

                fcc_next = fcc->next;
                DLIST_REMOVE(failed_connection_cache, fcc);
                free(fcc);

                fcc = fcc_next;
        }

}

void flush_negative_conn_cache_for_domain

(

const char *

domain

)

conncache.c の 171 行で定義されています。

参照先 failed_connection_cache::controller・failed_connection_cache::domain_name・failed_connection_cache::next・strequal().

参照元 winbindd_flush_negative_conn_cache().

{
        struct failed_connection_cache *fcc;
        
        fcc = failed_connection_cache;

        while (fcc) {
                struct failed_connection_cache *fcc_next;

                fcc_next = fcc->next;

                if (strequal(fcc->domain_name, domain)) {
                        DEBUG(10,("flush_negative_conn_cache_for_domain: removed server %s "
                                " from failed cache for domain %s\n",
                                fcc->controller, domain));
                        DLIST_REMOVE(failed_connection_cache, fcc);
                        free(fcc);
                }

                fcc = fcc_next;
        }
}

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変数

struct failed_connection_cache* failed_connection_cache [static]

conncache.c の 42 行で定義されています。

参照元 add_failed_connection_entry()・check_negative_conn_cache_timeout().

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