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[tcp] Discard all TCP connections on shutdown 

Allow detection of genuine memory leaks by ensuring that all TCP
connections are freed on shutdown.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-05-08 12:39:04 +01:00
parent 52dd4bacad
commit 8a0331c29b
1 changed files with 22 additions and 0 deletions
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22
src/net/tcp.c
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@ -7,6 +7,7 @@
#include <ipxe/timer.h>
#include <ipxe/iobuf.h>
#include <ipxe/malloc.h>
#include <ipxe/init.h>
#include <ipxe/retry.h>
#include <ipxe/refcnt.h>
#include <ipxe/xfer.h>
@ -343,6 +344,7 @@ static void tcp_close ( struct tcp_connection *tcp, int rc ) {
/* Remove from list and drop reference */
stop_timer ( &tcp->timer );
stop_timer ( &tcp->wait );
list_del ( &tcp->list );
ref_put ( &tcp->refcnt );
DBGC ( tcp, "TCP %p connection deleted\n", tcp );
@ -1261,6 +1263,26 @@ struct cache_discarder tcp_cache_discarder __cache_discarder = {
.discard = tcp_discard,
};
/**
* Shut down all TCP connections
*
*/
static void tcp_shutdown ( int booting __unused ) {
struct tcp_connection *tcp;
while ( ( tcp = list_first_entry ( &tcp_conns, struct tcp_connection,
list ) ) != NULL ) {
tcp->tcp_state = TCP_CLOSED;
tcp_dump_state ( tcp );
tcp_close ( tcp, -ECANCELED );
}
}
/** TCP shutdown function */
struct startup_fn tcp_startup_fn __startup_fn ( STARTUP_EARLY ) = {
.shutdown = tcp_shutdown,
};
/***************************************************************************
*
* Data transfer interface