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session: support close during migration

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Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Ife1e046b62bb0679419fd1346e973d0e3ea55489
This commit is contained in:
Florin Coras
2021-11-16 12:45:43 -08:00
committed by Damjan Marion
parent c215e5a317
commit 0200044387
2 changed files with 41 additions and 9 deletions
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48
src/vnet/session/session.c
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@ -936,16 +936,41 @@ session_stream_connect_notify (transport_connection_t * tc,
return 0;
}
typedef union session_switch_pool_reply_args_
{
struct
{
u32 session_index;
u16 thread_index;
u8 is_closed;
};
u64 as_u64;
} session_switch_pool_reply_args_t;
STATIC_ASSERT (sizeof (session_switch_pool_reply_args_t) <= sizeof (uword),
"switch pool reply args size");
static void
session_switch_pool_reply (void *arg)
{
u32 session_index = pointer_to_uword (arg);
session_switch_pool_reply_args_t rargs;
session_t *s;
s = session_get_if_valid (session_index, vlib_get_thread_index ());
rargs.as_u64 = pointer_to_uword (arg);
s = session_get_if_valid (rargs.session_index, rargs.thread_index);
if (!s)
return;
/* Session closed during migration. Clean everything up */
if (rargs.is_closed)
{
transport_cleanup (session_get_transport_proto (s), s->connection_index,
s->thread_index);
segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
session_free (s);
return;
}
/* Notify app that it has data on the new session */
session_enqueue_notify (s);
}
@ -965,11 +990,11 @@ static void
session_switch_pool (void *cb_args)
{
session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
session_switch_pool_reply_args_t rargs;
session_handle_t new_sh;
segment_manager_t *sm;
app_worker_t *app_wrk;
session_t *s;
void *rargs;
ASSERT (args->thread_index == vlib_get_thread_index ());
s = session_get (args->session_index, args->thread_index);
@ -977,8 +1002,8 @@ session_switch_pool (void *cb_args)
transport_cleanup (session_get_transport_proto (s), s->connection_index,
s->thread_index);
new_sh = session_make_handle (args->new_session_index,
args->new_thread_index);
/* Check if session closed during migration */
rargs.is_closed = s->session_state > SESSION_STATE_READY;
app_wrk = app_worker_get_if_valid (s->app_wrk_index);
if (app_wrk)
@ -989,13 +1014,20 @@ session_switch_pool (void *cb_args)
segment_manager_detach_fifo (sm, &s->tx_fifo);
/* Notify app, using old session, about the migration event */
app_worker_migrate_notify (app_wrk, s, new_sh);
if (!rargs.is_closed)
{
new_sh = session_make_handle (args->new_session_index,
args->new_thread_index);
app_worker_migrate_notify (app_wrk, s, new_sh);
}
}
/* Trigger app read and fifo updates on the new thread */
rargs = uword_to_pointer (args->new_session_index, void *);
rargs.session_index = args->new_session_index;
rargs.thread_index = args->new_thread_index;
session_send_rpc_evt_to_thread (args->new_thread_index,
session_switch_pool_reply, rargs);
session_switch_pool_reply,
uword_to_pointer (rargs.as_u64, void *));
session_free (s);
clib_mem_free (cb_args);