DEVICE *init_backend_dev(JCR *jcr, int device_type)
{
struct stat st;
char *backend_dir;
void *dl_handle = NULL;
POOL_MEM shared_library_name(PM_FNAME);
backend_interface_mapping_t *backend_interface_mapping;
backend_shared_library_t *backend_shared_library;
t_backend_instantiate backend_instantiate;
t_flush_backend flush_backend;
/*
* For dynamic loading storage backends there must be a list of backend dirs set.
*/
if (!backend_dirs) {
Jmsg(jcr, M_ERROR_TERM, 0, _("Catalog Backends Dir not configured.\n"));
}
backend_interface_mapping = lookup_backend_interface_mapping(device_type);
if (backend_interface_mapping == NULL) {
return (DEVICE *)NULL;
}
/*
* See if the backend is already loaded.
*/
if (loaded_backends) {
foreach_alist(backend_shared_library, loaded_backends) {
if (backend_shared_library->interface_type_id ==
backend_interface_mapping->interface_type_id) {
return backend_shared_library->backend_instantiate(jcr, device_type);
}
}
}
/*
* This is a new backend try to use dynamic loading to load the backend library.
*/
foreach_alist(backend_dir, backend_dirs) {
Mmsg(shared_library_name, "%s/libbareossd-%s%s", backend_dir,
backend_interface_mapping->interface_name, DYN_LIB_EXTENSION);
Dmsg3(100, "init_backend_dev: testing backend %s/libbareossd-%s%s\n",
backend_dir, backend_interface_mapping->interface_name, DYN_LIB_EXTENSION);
/*
* Make sure the shared library with this name exists.
*/
if (stat(shared_library_name.c_str(), &st) == 0) {
dl_handle = dlopen(shared_library_name.c_str(), RTLD_NOW);
if (!dl_handle) {
Jmsg(jcr, M_ERROR, 0, _("Unable to load shared library: %s ERR=%s\n"),
shared_library_name.c_str(), NPRT(dlerror()));
continue;
}
/*
* Lookup the backend_instantiate function.
*/
backend_instantiate = (t_backend_instantiate)dlsym(dl_handle, "backend_instantiate");
if (backend_instantiate == NULL) {
Jmsg(jcr, M_ERROR, 0, _("Lookup of backend_instantiate in shared library %s failed: ERR=%s\n"),
shared_library_name.c_str(), NPRT(dlerror()));
dlclose(dl_handle);
dl_handle = NULL;
continue;
}
/*
* Lookup the flush_backend function.
*/
flush_backend = (t_flush_backend)dlsym(dl_handle, "flush_backend");
if (flush_backend == NULL) {
Jmsg(jcr, M_ERROR, 0, _("Lookup of flush_backend in shared library %s failed: ERR=%s\n"),
shared_library_name.c_str(), NPRT(dlerror()));
dlclose(dl_handle);
dl_handle = NULL;
continue;
}
/*
* We found the shared library and it has the right entry points.
*/
break;
}
}
B_DB *db_init_database(JCR *jcr,
const char *db_driver,
const char *db_name,
const char *db_user,
const char *db_password,
const char *db_address,
int db_port,
const char *db_socket,
bool mult_db_connections,
bool disable_batch_insert,
bool need_private)
{
struct stat st;
char *backend_dir;
void *dl_handle = NULL;
POOL_MEM shared_library_name(PM_FNAME);
backend_interface_mapping_t *backend_interface_mapping;
backend_shared_library_t *backend_shared_library;
t_backend_instantiate backend_instantiate;
t_flush_backend flush_backend;
/*
* For dynamic loading catalog backends there must be a list of backend dirs set.
*/
if (!backend_dirs) {
Jmsg(jcr, M_ABORT, 0, _("Catalog Backends Dir not configured.\n"));
}
/*
* A db_driver is mandatory for dynamic loading of backends to work.
*/
if (!db_driver) {
Jmsg(jcr, M_ABORT, 0, _("Driver type not specified in Catalog resource.\n"));
}
/*
* If we didn't find a mapping its fatal because we don't know what database backend to use.
*/
backend_interface_mapping = lookup_backend_interface_mapping(db_driver);
if (backend_interface_mapping == NULL) {
Jmsg(jcr, M_ABORT, 0, _("Unknown database type: %s\n"), db_driver);
return (B_DB *)NULL;
}
/*
* See if the backend is already loaded.
*/
if (loaded_backends) {
foreach_alist(backend_shared_library, loaded_backends) {
if (backend_shared_library->interface_type_id ==
backend_interface_mapping->interface_type_id) {
return backend_shared_library->backend_instantiate(jcr,
db_driver,
db_name,
db_user,
db_password,
db_address,
db_port,
db_socket,
mult_db_connections,
disable_batch_insert,
need_private);
}
}
}
/*
* This is a new backend try to use dynamic loading to load the backend library.
*/
foreach_alist(backend_dir, backend_dirs) {
Mmsg(shared_library_name, "%s/libbareoscats-%s%s", backend_dir,
backend_interface_mapping->interface_name, DYN_LIB_EXTENSION);
Dmsg3(100, "db_init_database: testing backend %s/libbareoscats-%s%s\n",
backend_dir, backend_interface_mapping->interface_name, DYN_LIB_EXTENSION);
/*
* Make sure the shared library with this name exists.
*/
if (stat(shared_library_name.c_str(), &st) == 0) {
dl_handle = dlopen(shared_library_name.c_str(), RTLD_NOW);
if (!dl_handle) {
Jmsg(jcr, M_ERROR, 0, _("Unable to load shared library: %s ERR=%s\n"),
shared_library_name.c_str(), NPRT(dlerror()));
continue;
}
/*
* Lookup the backend_instantiate function.
*/
backend_instantiate = (t_backend_instantiate)dlsym(dl_handle, "backend_instantiate");
if (backend_instantiate == NULL) {
Jmsg(jcr, M_ERROR, 0, _("Lookup of backend_instantiate in shared library %s failed: ERR=%s\n"),
shared_library_name.c_str(), NPRT(dlerror()));
dlclose(dl_handle);
dl_handle = NULL;
continue;
}
/*
* Lookup the flush_backend function.
*/
flush_backend = (t_flush_backend)dlsym(dl_handle, "flush_backend");
if (flush_backend == NULL) {
Jmsg(jcr, M_ERROR, 0, _("Lookup of flush_backend in shared library %s failed: ERR=%s\n"),
shared_library_name.c_str(), NPRT(dlerror()));
dlclose(dl_handle);
dl_handle = NULL;
continue;
}
/*
* We found the shared library and it has the right entry points.
*/
break;
}
}
B_DB *db_init_database(JCR *jcr,
const char *db_driver,
const char *db_name,
const char *db_user,
const char *db_password,
const char *db_address,
int db_port,
const char *db_socket,
bool mult_db_connections,
bool disable_batch_insert,
bool need_private)
{
void *dl_handle;
char shared_library_name[1024];
backend_interface_mapping_t *backend_interface_mapping;
backend_shared_library_t *backend_shared_library;
t_backend_instantiate backend_instantiate;
t_flush_backend flush_backend;
/*
* A db_driver is mandatory for dynamic loading of backends to work.
*/
if (!db_driver) {
Jmsg(jcr, M_ABORT, 0, _("Driver type not specified in Catalog resource.\n"));
}
/*
* If we didn't find a mapping its fatal because we don't know what database backend to use.
*/
backend_interface_mapping = lookup_backend_interface_mapping(db_driver);
if (backend_interface_mapping == NULL) {
Jmsg(jcr, M_ABORT, 0, _("Unknown database type: %s\n"), db_driver);
return (B_DB *)NULL;
}
/*
* See if the backend is already loaded.
*/
if (loaded_backends) {
foreach_alist(backend_shared_library, loaded_backends) {
if (backend_shared_library->interface_type_id ==
backend_interface_mapping->interface_type_id) {
return backend_shared_library->backend_instantiate(jcr,
db_driver,
db_name,
db_user,
db_password,
db_address,
db_port,
db_socket,
mult_db_connections,
disable_batch_insert,
need_private);
}
}
}
/*
* This is a new backend try to use dynamic loading to load the backend library.
*/
#if defined(HAVE_WIN32)
bsnprintf(shared_library_name, sizeof(shared_library_name), "libbareoscats-%s%s",
backend_interface_mapping->interface_name, DYN_LIB_EXTENSION);
#else
bsnprintf(shared_library_name, sizeof(shared_library_name), "%s/libbareoscats-%s%s",
LIBDIR, backend_interface_mapping->interface_name, DYN_LIB_EXTENSION);
#endif
dl_handle = dlopen(shared_library_name, RTLD_NOW);
if (!dl_handle) {
Jmsg(jcr, M_ABORT, 0, _("Unable to load shared library: %s ERR=%s\n"),
shared_library_name, NPRT(dlerror()));
return (B_DB *)NULL;
}
/*
* Lookup the backend_instantiate function.
*/
backend_instantiate = (t_backend_instantiate)dlsym(dl_handle, "backend_instantiate");
if (backend_instantiate == NULL) {
Jmsg(jcr, M_ABORT, 0, _("Lookup of backend_instantiate in shared library %s failed: ERR=%s\n"),
shared_library_name, NPRT(dlerror()));
dlclose(dl_handle);
return (B_DB *)NULL;
}
/*
* Lookup the flush_backend function.
*/
flush_backend = (t_flush_backend)dlsym(dl_handle, "flush_backend");
if (flush_backend == NULL) {
Jmsg(jcr, M_ABORT, 0, _("Lookup of flush_backend in shared library %s failed: ERR=%s\n"),
shared_library_name, NPRT(dlerror()));
dlclose(dl_handle);
return (B_DB *)NULL;
}
/*
* Create a new loaded shared library entry and tack it onto the list of loaded backend shared libs.
*/
backend_shared_library = (backend_shared_library_t *)malloc(sizeof(backend_shared_library_t));
backend_shared_library->interface_type_id = backend_interface_mapping->interface_type_id;
backend_shared_library->handle = dl_handle;
backend_shared_library->backend_instantiate = backend_instantiate;
backend_shared_library->flush_backend = flush_backend;
if (loaded_backends == NULL) {
loaded_backends = New(alist(10, not_owned_by_alist));
}
loaded_backends->append(backend_shared_library);
return backend_shared_library->backend_instantiate(jcr,
db_driver,
db_name,
db_user,
db_password,
db_address,
db_port,
db_socket,
mult_db_connections,
disable_batch_insert,
need_private);
}
