slirp: use exit notifier for slirp_smb_cleanup

We would like to move back net_cleanup() at the end of main function, like it used to be until f30dbae, but minimum cleanup is needed regardless at exit() time for slirp's SMB functionality. Use an exit notifier to call slirp_smb_cleanup. If net_cleanup() is called first, then remove the exit notifier as it will become a dangling pointer otherwise. Reviewed-by: Marc-André Lureau <[email protected]> Reviewed-by: Jason Wang <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
ilg-archived · Jul 13, 2016 · f6c2e66 · f6c2e66
1 parent 9e32ff3
commit f6c2e66
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/net/slirp.c b/net/slirp.c
@@ -38,6 +38,7 @@
 #include "slirp/libslirp.h"
 #include "slirp/ip6.h"
 #include "sysemu/char.h"
+#include "sysemu/sysemu.h"
 #include "qemu/cutils.h"
 
 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
@@ -76,6 +77,7 @@ typedef struct SlirpState {
     NetClientState nc;
     QTAILQ_ENTRY(SlirpState) entry;
     Slirp *slirp;
+    Notifier exit_notifier;
 #ifndef _WIN32
     char smb_dir[128];
 #endif
@@ -118,11 +120,18 @@ static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t
     return size;
 }
 
+static void slirp_smb_exit(Notifier *n, void *data)
+{
+    SlirpState *s = container_of(n, SlirpState, exit_notifier);
+    slirp_smb_cleanup(s);
+}
+
 static void net_slirp_cleanup(NetClientState *nc)
 {
     SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
 
     slirp_cleanup(s->slirp);
+    qemu_remove_exit_notifier(&s->exit_notifier);
     slirp_smb_cleanup(s);
     QTAILQ_REMOVE(&slirp_stacks, s, entry);
 }
@@ -349,6 +358,8 @@ static int net_slirp_init(NetClientState *peer, const char *model,
     }
 #endif
 
+    s->exit_notifier.notify = slirp_smb_exit;
+    qemu_add_exit_notifier(&s->exit_notifier);
     return 0;
 
 error: