add support for killing running proto-shell tasks with an arbitrary signal and waitin...

diff --git a/dummy/netifd-proto.sh b/dummy/netifd-proto.sh
index 9fc9cab..6182ce1 100755 (executable)
--- a/dummy/netifd-proto.sh
+++ b/dummy/netifd-proto.sh
@@ -149,6 +149,15 @@ proto_run_command() {
        _proto_notify "$interface"
 }
 
+proto_kill_command() {
+       local interface="$1"; shift
+
+       json_init
+       json_add_int action 2
+       [ -n "$1" ] && json_add_int signal "$1"
+       _proto_notify "$interface"
+}
+
 init_proto() {
        proto="$1"; shift
        cmd="$1"; shift

diff --git a/dummy/proto/ppp.sh b/dummy/proto/ppp.sh
index 8673b98..837767b 100755 (executable)
--- a/dummy/proto/ppp.sh
+++ b/dummy/proto/ppp.sh
@@ -47,6 +47,7 @@ pppoe_setup() {
 }
 
 pppoe_teardown() {
+       proto_kill_command "$interface"
        return
 }
 

diff --git a/proto-shell.c b/proto-shell.c
index 3dcfb69..fdb87df 100644 (file)
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -39,6 +39,7 @@ struct proto_shell_state {
        struct uloop_process setup_task;
        struct uloop_process teardown_task;
        bool teardown_pending;
+       bool teardown_wait_task;
 
        struct uloop_process proto_task;
 };
@@ -99,9 +100,9 @@ proto_shell_handler(struct interface_proto_state *proto,
        } else {
                action = "teardown";
                proc = &state->teardown_task;
-               if (state->setup_task.pending) {
+               if (state->setup_task.pending && !state->teardown_wait_task) {
                        uloop_timeout_set(&state->setup_timeout, 1000);
-                       kill(state->setup_task.pid, SIGINT);
+                       kill(state->setup_task.pid, SIGTERM);
                        state->teardown_pending = true;
                        return 0;
                }
@@ -155,6 +156,9 @@ proto_shell_teardown_cb(struct uloop_process *p, int ret)
 
        state = container_of(p, struct proto_shell_state, teardown_task);
 
+       if (state->teardown_wait_task)
+               return;
+
        kill_process(&state->proto_task);
 
        if (state->l3_dev.dev)
@@ -167,11 +171,20 @@ static void
 proto_shell_task_cb(struct uloop_process *p, int ret)
 {
        struct proto_shell_state *state;
+       bool teardown_wait_task;
 
        state = container_of(p, struct proto_shell_state, proto_task);
+
+       teardown_wait_task = state->teardown_wait_task;
+       state->teardown_wait_task = false;
        if (state->teardown_pending || state->teardown_task.pending)
                return;
 
+       if (teardown_wait_task) {
+               proto_shell_teardown_cb(&state->teardown_task, 0);
+               return;
+       }
+
        state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
        proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 }
@@ -296,6 +309,7 @@ proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
 enum {
        NOTIFY_ACTION,
        NOTIFY_COMMAND,
+       NOTIFY_SIGNAL,
        NOTIFY_LINK_UP,
        NOTIFY_IFNAME,
        NOTIFY_ADDR_EXT,
@@ -310,6 +324,7 @@ enum {
 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
        [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
        [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
+       [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
        [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
        [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
        [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
@@ -405,6 +420,25 @@ error:
 }
 
 static int
+proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
+{
+       unsigned int signal = ~0;
+
+       if (tb[NOTIFY_SIGNAL])
+               signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
+
+       if (signal > 31)
+               signal = SIGTERM;
+
+       if (state->proto_task.pending) {
+               kill(state->proto_task.pid, signal);
+               state->teardown_wait_task = true;
+       }
+
+       return 0;
+}
+
+static int
 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
 {
        struct proto_shell_state *state;
@@ -421,6 +455,8 @@ proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
                return proto_shell_update_link(state, tb);
        case 1:
                return proto_shell_run_command(state, tb);
+       case 2:
+               return proto_shell_kill_command(state, tb);
        default:
                return UBUS_STATUS_INVALID_ARGUMENT;
        }