Add create session snapshot API in lttng-sessiond

[lttng-tools.git] / src / bin / lttng-sessiond / channel.c

diff --git a/src/bin/lttng-sessiond/channel.c b/src/bin/lttng-sessiond/channel.c
index d826125c9b8c7acaf5a57f294aeb7d29f78803ea..984576edc2e03b68595348f643dfa2e9c19ebdbb 100644 (file)
--- a/src/bin/lttng-sessiond/channel.c
+++ b/src/bin/lttng-sessiond/channel.c
@@ -184,6 +184,12 @@ int channel_kernel_create(struct ltt_kernel_session *ksession,
                attr = defattr;
        }
 
+       if (ksession->snapshot_mode) {
+               /* Force channel attribute for snapshot mode. */
+               attr->attr.overwrite = 1;
+               attr->attr.output = LTTNG_EVENT_MMAP;
+       }
+
        /* Channel not found, creating it */
        ret = kernel_create_channel(ksession, attr);
        if (ret < 0) {
@@ -263,6 +269,12 @@ int channel_ust_create(struct ltt_ust_session *usess,
                attr = defattr;
        }
 
+       if (usess->snapshot_mode) {
+               /* Force channel attribute for snapshot mode. */
+               attr->attr.overwrite = 1;
+               attr->attr.output = LTTNG_EVENT_MMAP;
+       }
+
        /*
         * Validate UST buffer size and number of buffers: must both be power of 2
         * and nonzero. We validate right here for UST, because applications will