Hi Oren,
commit 464ff47b6a1241410f432a55ce4bf93c8bd10861 isn't right. I guess
the problem is that ckpt_coordinator_status(), doesn't do a waitpid
on the global_child_pid? So if I do a 'restart -w --pids', then the
restarted task proceeds just fine, but restart immediately returns.
Maybe the right answer is to modify ckpt_coordinator_status() to
do a waitpid if ctx->args->wait, but just reverting this commit
doesn't seem to have any ill effects - all my default tests pass.
This reverts commit 464ff47b6a1241410f432a55ce4bf93c8bd10861.
---
restart.c | 25 +++++++++++++------------
1 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/restart.c b/restart.c
index d5d069a..cfc359b 100644
--- a/restart.c
+++ b/restart.c
@@ -994,12 +994,10 @@ static int ckpt_coordinator_pidns(struct ckpt_ctx *ctx)
ckpt_dbg("forking coordinator in new pidns\n");
/*
- * The coordinator report restart susccess/failure via pipe.
- * (It cannot use return value, because the in the default
- * --wait --copy-status case it is already used to report the
- * root-task's return value).
+ * We won't wait for (collect) the coordinator, so we use a
+ * pipe instead for the coordinator to report success/failure.
*/
- if (pipe(ctx->pipe_coord) < 0) {
+ if (!ctx->args->wait && pipe(ctx->pipe_coord)) {
perror("pipe");
return -1;
}
@@ -1035,7 +1033,10 @@ static int ckpt_coordinator_pidns(struct ckpt_ctx *ctx)
return -1;
ctx->args->copy_status = copy;
- return ckpt_coordinator_status(ctx);
+ if (ctx->args->wait)
+ return ckpt_collect_child(ctx);
+ else
+ return ckpt_coordinator_status(ctx);
}
#else
static int ckpt_coordinator_pidns(struct ckpt_ctx *ctx)
@@ -1093,13 +1094,13 @@ static int ckpt_coordinator(struct ckpt_ctx *ctx)
* around and be reaper until all tasks are gone.
* Otherwise, container will die as soon as we exit.
*/
-
- /* Report success/failure to the parent */
- if (write(ctx->pipe_coord[1], &ret, sizeof(ret)) < 0) {
- perror("failed to report status");
- exit(1);
+ if (!ctx->args->wait) {
+ /* report status because parent won't wait for us */
+ if (write(ctx->pipe_coord[1], &ret, sizeof(ret)) < 0) {
+ perror("failed to report status");
+ exit(1);
+ }
}
-
ret = ckpt_pretend_reaper(ctx);
} else if (ctx->args->wait) {
ret = ckpt_collect_child(ctx);
--
1.6.1.1
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