gfarm_error_t
gfm_server_inherit_fd(struct peer *peer, int from_client, int skip)
{
gfarm_int32_t e;
gfarm_int32_t parent_fd, fd;
struct host *spool_host;
struct process *process;
e = gfm_server_get_request(peer, "inherit_fd", "i", &parent_fd);
if (e != GFARM_ERR_NO_ERROR)
return (e);
if (skip)
return (GFARM_ERR_NO_ERROR);
giant_lock();
if (!from_client && (spool_host = peer_get_host(peer)) == NULL)
e = GFARM_ERR_OPERATION_NOT_PERMITTED;
else if ((process = peer_get_process(peer)) == NULL)
e = GFARM_ERR_OPERATION_NOT_PERMITTED;
else if ((e = process_inherit_fd(process, parent_fd, peer, NULL,
&fd)) != GFARM_ERR_NO_ERROR)
;
else
peer_fdpair_set_current(peer, fd);
giant_unlock();
return (gfm_server_put_reply(peer, "inherit_fd", e, ""));
}
gfarm_error_t
gfm_server_bequeath_fd(struct peer *peer, int from_client, int skip)
{
gfarm_int32_t e;
struct host *spool_host;
struct process *process;
gfarm_int32_t fd;
if (skip)
return (GFARM_ERR_NO_ERROR);
giant_lock();
if (!from_client && (spool_host = peer_get_host(peer)) == NULL)
e = GFARM_ERR_OPERATION_NOT_PERMITTED;
else if ((process = peer_get_process(peer)) == NULL)
e = GFARM_ERR_OPERATION_NOT_PERMITTED;
else if ((e = peer_fdpair_get_current(peer, &fd)) !=
GFARM_ERR_NO_ERROR)
;
else
e = process_bequeath_fd(process, fd);
giant_unlock();
return (gfm_server_put_reply(peer, "bequeath_fd", e, ""));
}
static gfarm_error_t
gfm_server_switch_back_channel_common(
struct peer *peer, gfp_xdr_xid_t xid, size_t *sizep,
int from_client,
int version, const char *diag, struct relayed_request *relay)
{
gfarm_error_t e = GFARM_ERR_NO_ERROR, e2;
struct host *host;
gfp_xdr_async_peer_t async = NULL;
struct local_peer *local_peer = NULL;
int is_direct_connection;
int i = 0;
#ifdef __GNUC__ /* workaround gcc warning: might be used uninitialized */
host = NULL;
#endif
is_direct_connection = (peer_get_parent(peer) == NULL);
giant_lock();
if (from_client) {
gflog_debug(GFARM_MSG_1001995,
"Operation not permitted: from_client");
e = GFARM_ERR_OPERATION_NOT_PERMITTED;
} else if ((host = peer_get_host(peer)) == NULL) {
gflog_debug(GFARM_MSG_1001996,
"Operation not permitted: peer_get_host() failed");
e = GFARM_ERR_OPERATION_NOT_PERMITTED;
} else if (is_direct_connection &&
(e = gfp_xdr_async_peer_new(&async)) != GFARM_ERR_NO_ERROR) {
gflog_error(GFARM_MSG_1002288,
"%s: gfp_xdr_async_peer_new(): %s",
diag, gfarm_error_string(e));
}
giant_unlock();
e2 = gfm_server_relay_put_reply(peer, xid, sizep, relay,
diag, &e, "i", &i/*XXX FIXME*/);
if (e2 != GFARM_ERR_NO_ERROR)
return (e2);
if (debug_mode)
gflog_debug(GFARM_MSG_1000404, "gfp_xdr_flush");
e2 = gfp_xdr_flush(peer_get_conn(peer));
if (e2 != GFARM_ERR_NO_ERROR) {
gflog_warning(GFARM_MSG_1000405,
"%s: protocol flush: %s",
diag, gfarm_error_string(e2));
return (e2);
} else if (e != GFARM_ERR_NO_ERROR)
return (e2);
if (is_direct_connection) {
local_peer = peer_to_local_peer(peer);
local_peer_set_async(local_peer, async); /* XXXRELAY */
local_peer_set_readable_watcher(local_peer,
back_channel_recv_watcher);
}
if (host_is_up(host)) /* throw away old connetion */ {
gflog_warning(GFARM_MSG_1002440,
"back_channel(%s): switching to new connection",
host_name(host));
host_disconnect_request(host, NULL);
}
giant_lock();
peer_set_peer_type(peer, peer_type_back_channel);
abstract_host_set_peer(host_to_abstract_host(host), peer, version);
giant_unlock();
if (is_direct_connection) {
local_peer_watch_readable(local_peer);
gfarm_thr_statewait_signal(
local_peer_get_statewait(local_peer), e2, diag);
}
callout_setfunc(host_status_callout(host),
NULL /* or, use back_channel_send_manager thread pool? */,
gfs_client_status_callout, host);
gfs_client_status_schedule(host, 1);
gflog_info(GFARM_MSG_1004035,
"back_channel(%s): started", host_name(host));
return (e2);
}
