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pasta: If a new namespace is created, wait for it to be ready before proceeding

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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-08-19 19:48:09 +02:00
parent 088d19fbb8
commit d5b3467056
1 changed files with 15 additions and 1 deletions
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16
passt.c
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@ -153,6 +153,18 @@ static void pasta_child_handler(int signal)
} }
} }
/**
* pasta_wait_for_ns() - Busy loop until we can enter the target namespace
* @target_pid: PID of process associated with target namespace
*
* Return: 0
*/
static int pasta_wait_for_ns(void *target_pid)
{
while (ns_enter(*(int *)target_pid));
return 0;
}
/** /**
* pasta_start_ns() - Fork shell in new namespace if target PID is not given * pasta_start_ns() - Fork shell in new namespace if target PID is not given
* @c: Execution context * @c: Execution context
@ -178,8 +190,10 @@ static void pasta_start_ns(struct ctx *c)
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if ((pasta_child_pid = c->pasta_pid)) if ((pasta_child_pid = c->pasta_pid)) {
NS_CALL(pasta_wait_for_ns, &pasta_child_pid);
return; return;
}
if (unshare(CLONE_NEWNET | CLONE_NEWUSER)) { if (unshare(CLONE_NEWNET | CLONE_NEWUSER)) {
perror("unshare"); perror("unshare");