X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftrace-chunk.c;h=9f0919a8896b7756121ffe18d6580e0550637f37;hp=451832fde245bbad1e35839f0a71e05f50454532;hb=8243bf1242a85b68217f36784948ed752c9b7325;hpb=93bed9fe8f48c11b7bb1224db36d82404cea080d

diff --git a/src/common/trace-chunk.c b/src/common/trace-chunk.c
index 451832fde..9f0919a88 100644
--- a/src/common/trace-chunk.c
+++ b/src/common/trace-chunk.c
@@ -77,7 +77,7 @@ struct lttng_trace_chunk {
 	struct lttng_dynamic_pointer_array top_level_directories;
 	/* Is contained within an lttng_trace_chunk_registry_element? */
 	bool in_registry_element;
-	bool name_overriden;
+	bool name_overridden;
 	char *name;
 	/* An unset id means the chunk is anonymous. */
 	LTTNG_OPTIONAL(uint64_t) id;
@@ -366,12 +366,14 @@ enum lttng_trace_chunk_status lttng_trace_chunk_set_close_timestamp(
 		goto end;
 	}
 	LTTNG_OPTIONAL_SET(&chunk->timestamp_close, close_ts);
-	free(chunk->name);
-	chunk->name = generate_chunk_name(LTTNG_OPTIONAL_GET(chunk->id),
-			LTTNG_OPTIONAL_GET(chunk->timestamp_creation),
-			&close_ts);
-	if (!chunk->name) {
-		status = LTTNG_TRACE_CHUNK_STATUS_ERROR;
+	if (!chunk->name_overridden) {
+		free(chunk->name);
+		chunk->name = generate_chunk_name(LTTNG_OPTIONAL_GET(chunk->id),
+				LTTNG_OPTIONAL_GET(chunk->timestamp_creation),
+				&close_ts);
+		if (!chunk->name) {
+			status = LTTNG_TRACE_CHUNK_STATUS_ERROR;
+		}
 	}
 end:
 	pthread_mutex_unlock(&chunk->lock);
@@ -381,13 +383,13 @@ end:
 LTTNG_HIDDEN
 enum lttng_trace_chunk_status lttng_trace_chunk_get_name(
 		struct lttng_trace_chunk *chunk, const char **name,
-		bool *name_overriden)
+		bool *name_overridden)
 {
 	enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK;
 
 	pthread_mutex_lock(&chunk->lock);
-        if (name_overriden) {
-		*name_overriden = chunk->name_overriden;
+        if (name_overridden) {
+		*name_overridden = chunk->name_overridden;
         }
         if (!chunk->name) {
 		status = LTTNG_TRACE_CHUNK_STATUS_NONE;
@@ -399,6 +401,27 @@ end:
 	return status;
 }
 
+static
+bool is_valid_chunk_name(const char *name)
+{
+	size_t len;
+
+	if (!name) {
+		return false;
+	}
+
+	len = lttng_strnlen(name, LTTNG_NAME_MAX);
+	if (len == 0 || len == LTTNG_NAME_MAX) {
+		return false;
+	}
+
+	if (strchr(name, '/') || strchr(name, '.')) {
+		return false;
+	}
+
+	return true;
+}
+
 LTTNG_HIDDEN
 enum lttng_trace_chunk_status lttng_trace_chunk_override_name(
 		struct lttng_trace_chunk *chunk, const char *name)
@@ -407,7 +430,7 @@ enum lttng_trace_chunk_status lttng_trace_chunk_override_name(
 	char *new_name;
 	enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK;
 
-	if (!name || !*name || strnlen(name, LTTNG_NAME_MAX) == LTTNG_NAME_MAX) {
+	if (!is_valid_chunk_name(name)) {
 		ERR("Attempted to set an invalid name on a trace chunk: name = %s",
 				name ? : "NULL");
 		status = LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT;
@@ -429,7 +452,7 @@ enum lttng_trace_chunk_status lttng_trace_chunk_override_name(
 	}
 	free(chunk->name);
 	chunk->name = new_name;
-	chunk->name_overriden = true;
+	chunk->name_overridden = true;
 end_unlock:	
 	pthread_mutex_unlock(&chunk->lock);
 end:
@@ -633,7 +656,7 @@ int add_top_level_directory_unique(struct lttng_trace_chunk *chunk,
 	}
 
 	if (!found) {
-		char *copy = strndup(new_path, new_path_top_level_len);
+		char *copy = lttng_strndup(new_path, new_path_top_level_len);
 
 		DBG("Adding new top-level directory \"%s\" to trace chunk \"%s\"",
 				new_path, chunk->name ? : "(unnamed)");
@@ -800,19 +823,26 @@ void lttng_trace_chunk_move_to_completed(struct lttng_trace_chunk *trace_chunk)
 	int ret;
 	char *directory_to_rename = NULL;
 	bool free_directory_to_rename = false;
-	const int session_dirfd =
-			trace_chunk->session_output_directory.value.dirfd;
 	char *archived_chunk_name = NULL;
 	const uint64_t chunk_id = LTTNG_OPTIONAL_GET(trace_chunk->id);
 	const time_t creation_timestamp =
 			LTTNG_OPTIONAL_GET(trace_chunk->timestamp_creation);
 	const time_t close_timestamp =
 			LTTNG_OPTIONAL_GET(trace_chunk->timestamp_close);
-	LTTNG_OPTIONAL(struct lttng_directory_handle) archived_chunks_directory;
+	LTTNG_OPTIONAL(struct lttng_directory_handle) archived_chunks_directory = {};
+
+	if (!trace_chunk->mode.is_set ||
+			trace_chunk->mode.value != TRACE_CHUNK_MODE_OWNER ||
+			!trace_chunk->session_output_directory.is_set) {
+		/*
+		 * This command doesn't need to run if the output is remote
+		 * or if the trace chunk is not owned by this process.
+		 */
+		goto end;
+	}
 
-	assert(trace_chunk->mode.is_set);
 	assert(trace_chunk->mode.value == TRACE_CHUNK_MODE_OWNER);
-	assert(!trace_chunk->name_overriden);
+	assert(!trace_chunk->name_overridden);
 
 	/*
 	 * The fist trace chunk of a session is directly output to the
@@ -845,17 +875,18 @@ void lttng_trace_chunk_move_to_completed(struct lttng_trace_chunk *trace_chunk)
 		}
 
 		for (i = 0; i < count; i++) {
-			const int temp_dirfd = temporary_rename_directory.dirfd;
 			const char *top_level_name =
 					lttng_dynamic_pointer_array_get_pointer(
 						&trace_chunk->top_level_directories, i);
 
-			/*
-			 * FIXME replace renamat() use by directory handle
-			 * wrapper for non-POSIX 2008 systems.
-			 */
-			ret = renameat(session_dirfd, top_level_name,
-					temp_dirfd, top_level_name);
+			ret = lttng_directory_handle_rename_as_user(
+					&trace_chunk->session_output_directory.value,
+					top_level_name,
+					&temporary_rename_directory,
+					top_level_name,
+					LTTNG_OPTIONAL_GET(trace_chunk->credentials).use_current_user ?
+						NULL :
+						&trace_chunk->credentials.value.user);
 			if (ret) {
 				PERROR("Failed to move \"%s\" to temporary trace chunk rename directory",
 						top_level_name);
@@ -906,13 +937,14 @@ void lttng_trace_chunk_move_to_completed(struct lttng_trace_chunk *trace_chunk)
 	}
 	archived_chunks_directory.is_set = true;
 
-	/*
-	 * FIXME replace renamat() use by directory handle
-	 * wrapper for non-POSIX 2008 systems.
-	 */
-	ret = renameat(session_dirfd, directory_to_rename,
-			archived_chunks_directory.value.dirfd,
-			archived_chunk_name);
+	ret = lttng_directory_handle_rename_as_user(
+			&trace_chunk->session_output_directory.value,
+			directory_to_rename,
+			&archived_chunks_directory.value,
+			archived_chunk_name,
+			LTTNG_OPTIONAL_GET(trace_chunk->credentials).use_current_user ?
+				NULL :
+				&trace_chunk->credentials.value.user);
 	if (ret) {
 		PERROR("Failed to rename folder \"%s\" to \"%s\"",
 				directory_to_rename, archived_chunk_name);
@@ -928,6 +960,24 @@ end:
 	}
 }
 
+LTTNG_HIDDEN
+enum lttng_trace_chunk_status lttng_trace_chunk_get_close_command(
+		struct lttng_trace_chunk *chunk,
+		enum lttng_trace_chunk_command_type *command_type)
+{
+	enum lttng_trace_chunk_status status = LTTNG_TRACE_CHUNK_STATUS_OK;
+
+	pthread_mutex_lock(&chunk->lock);
+	if (chunk->close_command.is_set) {
+		*command_type = chunk->close_command.value;
+		status = LTTNG_TRACE_CHUNK_STATUS_OK;
+	} else {
+		status = LTTNG_TRACE_CHUNK_STATUS_NONE;
+	}
+	pthread_mutex_unlock(&chunk->lock);
+	return status;
+}
+
 LTTNG_HIDDEN
 enum lttng_trace_chunk_status lttng_trace_chunk_set_close_command(
 		struct lttng_trace_chunk *chunk,
@@ -956,6 +1006,18 @@ end_unlock:
 	return status;
 }
 
+LTTNG_HIDDEN
+const char *lttng_trace_chunk_command_type_get_name(
+		enum lttng_trace_chunk_command_type command)
+{
+	switch (command) {
+	case LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED:
+		return "move to completed trace chunk folder";
+	default:
+		abort();
+	}
+}
+
 LTTNG_HIDDEN
 bool lttng_trace_chunk_get(struct lttng_trace_chunk *chunk)
 {
@@ -1034,7 +1096,7 @@ end:
 	return registry;
 error:
 	lttng_trace_chunk_registry_destroy(registry);
-	goto end;
+	return NULL;
 }
 
 LTTNG_HIDDEN
@@ -1233,3 +1295,49 @@ lttng_trace_chunk_registry_find_anonymous_chunk(
         return _lttng_trace_chunk_registry_find_chunk(registry,
 			session_id, NULL);
 }
+
+unsigned int lttng_trace_chunk_registry_put_each_chunk(
+		struct lttng_trace_chunk_registry *registry)
+{
+	struct cds_lfht_iter iter;
+	struct lttng_trace_chunk_registry_element *chunk_element;
+	unsigned int trace_chunks_left = 0;
+
+	DBG("Releasing trace chunk registry to all trace chunks");
+	rcu_read_lock();
+	cds_lfht_for_each_entry(registry->ht,
+			&iter, chunk_element, trace_chunk_registry_ht_node) {
+		const char *chunk_id_str = "none";
+		char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)];
+
+		pthread_mutex_lock(&chunk_element->chunk.lock);
+		if (chunk_element->chunk.id.is_set) {
+			int fmt_ret;
+
+			fmt_ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf),
+					"%" PRIu64,
+					chunk_element->chunk.id.value);
+			if (fmt_ret < 0 || fmt_ret >= sizeof(chunk_id_buf)) {
+				chunk_id_str = "formatting error";
+			} else {
+				chunk_id_str = chunk_id_buf;
+			}
+		}
+
+		DBG("Releasing reference to trace chunk: session_id = %" PRIu64
+				"chunk_id = %s, name = \"%s\", status = %s",
+				chunk_element->session_id,
+				chunk_id_str,
+				chunk_element->chunk.name ? : "none",
+				chunk_element->chunk.close_command.is_set ?
+						"open" : "closed");
+		pthread_mutex_unlock(&chunk_element->chunk.lock);
+		lttng_trace_chunk_put(&chunk_element->chunk);
+		trace_chunks_left++;
+	}
+	rcu_read_unlock();
+	DBG("Released reference to %u trace chunks in %s()", trace_chunks_left,
+			__FUNCTION__);
+
+	return trace_chunks_left;
+}