X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fchannel.c;h=7c95a0d2194d4e6de2e43e726b98ee05fcb2d2cd;hb=045fc61744f711fd2e4ca84c6339d97f1eafc71d;hp=d826125c9b8c7acaf5a57f294aeb7d29f78803ea;hpb=12744796179ed3bfa9c3b6e22bfdeabf2e6081bf;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/channel.c b/src/bin/lttng-sessiond/channel.c
index d826125c9..7c95a0d21 100644
--- a/src/bin/lttng-sessiond/channel.c
+++ b/src/bin/lttng-sessiond/channel.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2 only,
@@ -15,7 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <inttypes.h>
 #include <string.h>
 #include <unistd.h>
@@ -38,6 +39,7 @@ struct lttng_channel *channel_new_default_attr(int dom,
 		enum lttng_buffer_type type)
 {
 	struct lttng_channel *chan;
+	const char *channel_name = DEFAULT_CHANNEL_NAME;
 
 	chan = zmalloc(sizeof(struct lttng_channel));
 	if (chan == NULL) {
@@ -45,12 +47,6 @@ struct lttng_channel *channel_new_default_attr(int dom,
 		goto error_alloc;
 	}
 
-	if (snprintf(chan->name, sizeof(chan->name), "%s",
-				DEFAULT_CHANNEL_NAME) < 0) {
-		PERROR("snprintf default channel name");
-		goto error;
-	}
-
 	/* Same for all domains. */
 	chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
 	chan->attr.tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE;
@@ -65,8 +61,19 @@ struct lttng_channel *channel_new_default_attr(int dom,
 		chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
 		chan->attr.switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
 		chan->attr.read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER;
+		chan->attr.live_timer_interval = DEFAULT_KERNEL_CHANNEL_LIVE_TIMER;
 		break;
+	case LTTNG_DOMAIN_JUL:
+		channel_name = DEFAULT_JUL_CHANNEL_NAME;
+		goto common_ust;
+	case LTTNG_DOMAIN_LOG4J:
+		channel_name = DEFAULT_LOG4J_CHANNEL_NAME;
+		goto common_ust;
+	case LTTNG_DOMAIN_PYTHON:
+		channel_name = DEFAULT_PYTHON_CHANNEL_NAME;
+		goto common_ust;
 	case LTTNG_DOMAIN_UST:
+common_ust:
 		switch (type) {
 		case LTTNG_BUFFER_PER_UID:
 			chan->attr.subbuf_size = default_get_ust_uid_channel_subbuf_size();
@@ -76,6 +83,8 @@ struct lttng_channel *channel_new_default_attr(int dom,
 				DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER;
 			chan->attr.read_timer_interval =
 				DEFAULT_UST_UID_CHANNEL_READ_TIMER;
+			chan->attr.live_timer_interval =
+				DEFAULT_UST_UID_CHANNEL_LIVE_TIMER;
 			break;
 		case LTTNG_BUFFER_PER_PID:
 		default:
@@ -86,6 +95,8 @@ struct lttng_channel *channel_new_default_attr(int dom,
 				DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER;
 			chan->attr.read_timer_interval =
 				DEFAULT_UST_PID_CHANNEL_READ_TIMER;
+			chan->attr.live_timer_interval =
+				DEFAULT_UST_UID_CHANNEL_LIVE_TIMER;
 			break;
 		}
 		break;
@@ -93,6 +104,11 @@ struct lttng_channel *channel_new_default_attr(int dom,
 		goto error;	/* Not implemented */
 	}
 
+	if (snprintf(chan->name, sizeof(chan->name), "%s",
+			channel_name) < 0) {
+		PERROR("snprintf default channel name");
+		goto error;
+	}
 	return chan;
 
 error:
@@ -184,6 +200,12 @@ 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 +285,12 @@ 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
@@ -315,11 +343,24 @@ int channel_ust_create(struct ltt_ust_session *usess,
 	}
 
 	/* Create UST channel */
-	uchan = trace_ust_create_channel(attr);
+	uchan = trace_ust_create_channel(attr, LTTNG_DOMAIN_UST);
 	if (uchan == NULL) {
 		ret = LTTNG_ERR_FATAL;
 		goto error;
 	}
+
+	/*
+	 * HACK: Set the channel's subdomain (JUL, Log4j, Python, etc.)
+	 * based on the default name.
+	 */
+	if (!strcmp(uchan->name, DEFAULT_JUL_CHANNEL_NAME)) {
+		uchan->domain = LTTNG_DOMAIN_JUL;
+	} else if (!strcmp(uchan->name, DEFAULT_LOG4J_CHANNEL_NAME)) {
+		uchan->domain = LTTNG_DOMAIN_LOG4J;
+	} else if (!strcmp(uchan->name, DEFAULT_PYTHON_CHANNEL_NAME)) {
+		uchan->domain = LTTNG_DOMAIN_PYTHON;
+	}
+
 	uchan->enabled = 1;
 	if (trace_ust_is_max_id(usess->used_channel_id)) {
 		ret = LTTNG_ERR_UST_CHAN_FAIL;
@@ -349,7 +390,18 @@ int channel_ust_create(struct ltt_ust_session *usess,
 
 	/* Adding the channel to the channel hash table. */
 	rcu_read_lock();
-	lttng_ht_add_unique_str(usess->domain_global.channels, &uchan->node);
+	if (strncmp(uchan->name, DEFAULT_METADATA_NAME,
+				sizeof(uchan->name))) {
+		lttng_ht_add_unique_str(usess->domain_global.channels, &uchan->node);
+	} else {
+		/*
+		 * Copy channel attribute to session if this is metadata so if NO
+		 * application exists we can access that data in the shadow copy during
+		 * the global update of newly registered application.
+		 */
+		memcpy(&usess->metadata_attr, &uchan->attr,
+				sizeof(usess->metadata_attr));
+	}
 	rcu_read_unlock();
 
 	DBG2("Channel %s created successfully", uchan->name);