Refactor: move the snapshot type check into output type check

Since for both sub-session type the boilerplate is the same
simply move the check for sub-session type presence to the inner
check of type output.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index 606b9d9f64ee0324a301a270f35ebcd74fe4aa24..b25fda3e8f3f264229c1164b5a01b0a29f558535 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -3201,135 +3201,93 @@ int cmd_snapshot_record(struct ltt_session *session,
                use_tmp_output = 1;
        }
 
-       if (session->kernel_session) {
-               struct ltt_kernel_session *ksess = session->kernel_session;
+       if (use_tmp_output) {
+               int64_t nb_packets_per_stream;
 
-               if (use_tmp_output) {
-                       int64_t nb_packets_per_stream;
+               nb_packets_per_stream = get_session_nb_packets_per_stream(session,
+                               tmp_output.max_size);
+               if (nb_packets_per_stream < 0) {
+                       ret = LTTNG_ERR_MAX_SIZE_INVALID;
+                       goto error;
+               }
 
-                       nb_packets_per_stream = get_session_nb_packets_per_stream(session,
-                                       tmp_output.max_size);
-                       if (nb_packets_per_stream < 0) {
-                               ret = LTTNG_ERR_MAX_SIZE_INVALID;
+               if (session->kernel_session) {
+                       ret = record_kernel_snapshot(session->kernel_session,
+                                       &tmp_output, session,
+                                       wait, nb_packets_per_stream);
+                       if (ret != LTTNG_OK) {
                                goto error;
                        }
-                       ret = record_kernel_snapshot(ksess, &tmp_output, session,
+               }
+
+               if (session->ust_session) {
+                       ret = record_ust_snapshot(session->ust_session,
+                                       &tmp_output, session,
                                        wait, nb_packets_per_stream);
                        if (ret != LTTNG_OK) {
                                goto error;
                        }
-                       snapshot_success = 1;
-               } else {
-                       struct snapshot_output *sout;
-                       struct lttng_ht_iter iter;
-
-                       rcu_read_lock();
-                       cds_lfht_for_each_entry(session->snapshot.output_ht->ht,
-                                       &iter.iter, sout, node.node) {
-                               int64_t nb_packets_per_stream;
-
-                               /*
-                                * Make a local copy of the output and assign the possible
-                                * temporary value given by the caller.
-                                */
-                               memset(&tmp_output, 0, sizeof(tmp_output));
-                               memcpy(&tmp_output, sout, sizeof(tmp_output));
-
-                               if (output->max_size != (uint64_t) -1ULL) {
-                                       tmp_output.max_size = output->max_size;
-                               }
+               }
 
-                               nb_packets_per_stream = get_session_nb_packets_per_stream(session,
-                                               tmp_output.max_size);
-                               if (nb_packets_per_stream < 0) {
-                                       ret = LTTNG_ERR_MAX_SIZE_INVALID;
-                                       goto error;
-                               }
+               snapshot_success = 1;
+       } else {
+               struct snapshot_output *sout;
+               struct lttng_ht_iter iter;
 
-                               /* Use temporary name. */
-                               if (*output->name != '\0') {
-                                       strncpy(tmp_output.name, output->name,
-                                                       sizeof(tmp_output.name));
-                               }
+               rcu_read_lock();
+               cds_lfht_for_each_entry(session->snapshot.output_ht->ht,
+                               &iter.iter, sout, node.node) {
+                       int64_t nb_packets_per_stream;
 
-                               tmp_output.nb_snapshot = session->snapshot.nb_snapshot;
+                       /*
+                        * Make a local copy of the output and assign the possible
+                        * temporary value given by the caller.
+                        */
+                       memset(&tmp_output, 0, sizeof(tmp_output));
+                       memcpy(&tmp_output, sout, sizeof(tmp_output));
 
-                               ret = record_kernel_snapshot(ksess, &tmp_output,
-                                               session, wait, nb_packets_per_stream);
-                               if (ret != LTTNG_OK) {
-                                       rcu_read_unlock();
-                                       goto error;
-                               }
-                               snapshot_success = 1;
+                       if (output->max_size != (uint64_t) -1ULL) {
+                               tmp_output.max_size = output->max_size;
                        }
-                       rcu_read_unlock();
-               }
-       }
-
-       if (session->ust_session) {
-               struct ltt_ust_session *usess = session->ust_session;
-
-               if (use_tmp_output) {
-                       int64_t nb_packets_per_stream;
 
                        nb_packets_per_stream = get_session_nb_packets_per_stream(session,
                                        tmp_output.max_size);
                        if (nb_packets_per_stream < 0) {
                                ret = LTTNG_ERR_MAX_SIZE_INVALID;
+                               rcu_read_unlock();
                                goto error;
                        }
-                       ret = record_ust_snapshot(usess, &tmp_output, session,
-                                       wait, nb_packets_per_stream);
-                       if (ret != LTTNG_OK) {
-                               goto error;
-                       }
-                       snapshot_success = 1;
-               } else {
-                       struct snapshot_output *sout;
-                       struct lttng_ht_iter iter;
 
-                       rcu_read_lock();
-                       cds_lfht_for_each_entry(session->snapshot.output_ht->ht,
-                                       &iter.iter, sout, node.node) {
-                               int64_t nb_packets_per_stream;
-
-                               /*
-                                * Make a local copy of the output and assign the possible
-                                * temporary value given by the caller.
-                                */
-                               memset(&tmp_output, 0, sizeof(tmp_output));
-                               memcpy(&tmp_output, sout, sizeof(tmp_output));
+                       /* Use temporary name. */
+                       if (*output->name != '\0') {
+                               strncpy(tmp_output.name, output->name,
+                                               sizeof(tmp_output.name));
+                       }
 
-                               if (output->max_size != (uint64_t) -1ULL) {
-                                       tmp_output.max_size = output->max_size;
-                               }
+                       tmp_output.nb_snapshot = session->snapshot.nb_snapshot;
 
-                               nb_packets_per_stream = get_session_nb_packets_per_stream(session,
-                                               tmp_output.max_size);
-                               if (nb_packets_per_stream < 0) {
-                                       ret = LTTNG_ERR_MAX_SIZE_INVALID;
+                       if (session->kernel_session) {
+                               ret = record_kernel_snapshot(session->kernel_session,
+                                               &tmp_output, session,
+                                               wait, nb_packets_per_stream);
+                               if (ret != LTTNG_OK) {
                                        rcu_read_unlock();
                                        goto error;
                                }
+                       }
 
-                               /* Use temporary name. */
-                               if (*output->name != '\0') {
-                                       strncpy(tmp_output.name, output->name,
-                                                       sizeof(tmp_output.name));
-                               }
-
-                               tmp_output.nb_snapshot = session->snapshot.nb_snapshot;
-
-                               ret = record_ust_snapshot(usess, &tmp_output, session,
+                       if (session->ust_session) {
+                               ret = record_ust_snapshot(session->ust_session,
+                                               &tmp_output, session,
                                                wait, nb_packets_per_stream);
                                if (ret != LTTNG_OK) {
                                        rcu_read_unlock();
                                        goto error;
                                }
-                               snapshot_success = 1;
                        }
-                       rcu_read_unlock();
+                       snapshot_success = 1;
                }
+               rcu_read_unlock();
        }
 
        if (snapshot_success) {