Add userspace namespace contexts

[lttng-ust.git] / liblttng-ust / lttng-ust-comm.c

diff --git a/liblttng-ust/lttng-ust-comm.c b/liblttng-ust/lttng-ust-comm.c
index e392e460cca2dada53036fc622adbc8b3cf87355..5a2aacdf32d6513348465bdedf0cbfc398b372be 100644 (file)
--- a/liblttng-ust/lttng-ust-comm.c
+++ b/liblttng-ust/lttng-ust-comm.c
@@ -86,6 +86,8 @@ static int initialized;
  *
  * ust_lock nests within the dynamic loader lock (within glibc) because
  * it is taken within the library constructor.
+ *
+ * The ust fd tracker lock nests within the ust_mutex.
  */
 static pthread_mutex_t ust_mutex = PTHREAD_MUTEX_INITIALIZER;
 
@@ -421,7 +423,12 @@ void lttng_ust_fixup_tls(void)
        lttng_fixup_nest_count_tls();
        lttng_fixup_procname_tls();
        lttng_fixup_ust_mutex_nest_tls();
+       lttng_ust_fixup_perf_counter_tls();
        lttng_ust_fixup_fd_tracker_tls();
+       lttng_fixup_cgroup_ns_tls();
+       lttng_fixup_ipc_ns_tls();
+       lttng_fixup_net_ns_tls();
+       lttng_fixup_uts_ns_tls();
 }
 
 int lttng_get_notify_socket(void *owner)
@@ -2031,6 +2038,18 @@ void __attribute__((destructor)) lttng_ust_exit(void)
        lttng_ust_cleanup(1);
 }
 
+static
+void ust_context_ns_reset(void)
+{
+       lttng_context_pid_ns_reset();
+       lttng_context_cgroup_ns_reset();
+       lttng_context_ipc_ns_reset();
+       lttng_context_mnt_ns_reset();
+       lttng_context_net_ns_reset();
+       lttng_context_user_ns_reset();
+       lttng_context_uts_ns_reset();
+}
+
 /*
  * We exclude the worker threads across fork and clone (except
  * CLONE_VM), because these system calls only keep the forking thread
@@ -2065,6 +2084,8 @@ void ust_before_fork(sigset_t *save_sigset)
 
        ust_lock_nocheck();
        urcu_bp_before_fork();
+       lttng_ust_lock_fd_tracker();
+       lttng_perf_lock();
 }
 
 static void ust_after_fork_common(sigset_t *restore_sigset)
@@ -2072,6 +2093,8 @@ static void ust_after_fork_common(sigset_t *restore_sigset)
        int ret;
 
        DBG("process %d", getpid());
+       lttng_perf_unlock();
+       lttng_ust_unlock_fd_tracker();
        ust_unlock();
 
        pthread_mutex_unlock(&ust_fork_mutex);
@@ -2109,6 +2132,7 @@ void ust_after_fork_child(sigset_t *restore_sigset)
        lttng_context_vpid_reset();
        lttng_context_vtid_reset();
        lttng_context_procname_reset();
+       ust_context_ns_reset();
        DBG("process %d", getpid());
        /* Release urcu mutexes */
        urcu_bp_after_fork_child();
@@ -2118,6 +2142,16 @@ void ust_after_fork_child(sigset_t *restore_sigset)
        lttng_ust_init();
 }
 
+void ust_after_setns(void)
+{
+       ust_context_ns_reset();
+}
+
+void ust_after_unshare(void)
+{
+       ust_context_ns_reset();
+}
+
 void lttng_ust_sockinfo_session_enabled(void *owner)
 {
        struct sock_info *sock_info = owner;