-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
* lttng-context.c
*
* LTTng trace/channel/event context management.
*
* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
-#include "wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
-#include "lttng-events.h"
-#include "lttng-tracer.h"
+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
+#include <lttng-events.h>
+#include <lttng-tracer.h>
+
+/*
+ * The filter implementation requires that two consecutive "get" for the
+ * same context performed by the same thread return the same result.
+ */
+
+/*
+ * Static array of contexts, for $ctx filters.
+ */
+struct lttng_ctx *lttng_static_ctx;
int lttng_find_context(struct lttng_ctx *ctx, const char *name)
{
}
EXPORT_SYMBOL_GPL(lttng_find_context);
+int lttng_get_context_index(struct lttng_ctx *ctx, const char *name)
+{
+ unsigned int i;
+ const char *subname;
+
+ if (!ctx)
+ return -1;
+ if (strncmp(name, "$ctx.", strlen("$ctx.")) == 0) {
+ subname = name + strlen("$ctx.");
+ } else {
+ subname = name;
+ }
+ for (i = 0; i < ctx->nr_fields; i++) {
+ /* Skip allocated (but non-initialized) contexts */
+ if (!ctx->fields[i].event_field.name)
+ continue;
+ if (!strcmp(ctx->fields[i].event_field.name, subname))
+ return i;
+ }
+ return -1;
+}
+EXPORT_SYMBOL_GPL(lttng_get_context_index);
+
/*
* Note: as we append context information, the pointer location may change.
*/
struct lttng_ctx_field *new_fields;
ctx->allocated_fields = max_t(size_t, 1, 2 * ctx->allocated_fields);
- new_fields = kzalloc(ctx->allocated_fields * sizeof(struct lttng_ctx_field), GFP_KERNEL);
+ new_fields = lttng_kvzalloc(ctx->allocated_fields * sizeof(struct lttng_ctx_field), GFP_KERNEL);
if (!new_fields)
return NULL;
if (ctx->fields)
memcpy(new_fields, ctx->fields, sizeof(*ctx->fields) * ctx->nr_fields);
- kfree(ctx->fields);
+ lttng_kvfree(ctx->fields);
ctx->fields = new_fields;
}
field = &ctx->fields[ctx->nr_fields];
field_align = type->u.basic.integer.alignment;
break;
case atype_array:
+ case atype_array_bitfield:
{
struct lttng_basic_type *btype;
case atype_array:
case atype_sequence:
+ case atype_array_bitfield:
+ case atype_sequence_bitfield:
+ case atype_struct:
+ case atype_array_compound:
+ case atype_sequence_compound:
+ case atype_variant:
default:
WARN_ON_ONCE(1);
break;
break;
}
case atype_sequence:
+ case atype_sequence_bitfield:
{
struct lttng_basic_type *btype;
case atype_string:
case atype_array:
case atype_sequence:
+ case atype_array_bitfield:
+ case atype_sequence_bitfield:
+ case atype_struct:
+ case atype_array_compound:
+ case atype_sequence_compound:
+ case atype_variant:
default:
WARN_ON_ONCE(1);
break;
case atype_array:
case atype_sequence:
+ case atype_array_bitfield:
+ case atype_sequence_bitfield:
+ case atype_struct:
+ case atype_array_compound:
+ case atype_sequence_compound:
+ case atype_variant:
default:
WARN_ON_ONCE(1);
break;
case atype_string:
break;
+ case atype_struct:
+ case atype_array_compound:
+ case atype_sequence_compound:
+ case atype_variant:
+ break;
+
case atype_enum:
default:
WARN_ON_ONCE(1);
if (ctx->fields[i].destroy)
ctx->fields[i].destroy(&ctx->fields[i]);
}
- kfree(ctx->fields);
+ lttng_kvfree(ctx->fields);
kfree(ctx);
}
+
+int lttng_context_init(void)
+{
+ int ret;
+
+ ret = lttng_add_hostname_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_hostname_to_ctx");
+ }
+ ret = lttng_add_nice_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_nice_to_ctx");
+ }
+ ret = lttng_add_pid_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_pid_to_ctx");
+ }
+ ret = lttng_add_ppid_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_ppid_to_ctx");
+ }
+ ret = lttng_add_prio_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_prio_to_ctx");
+ }
+ ret = lttng_add_procname_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_procname_to_ctx");
+ }
+ ret = lttng_add_tid_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_tid_to_ctx");
+ }
+ ret = lttng_add_vppid_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_vppid_to_ctx");
+ }
+ ret = lttng_add_vtid_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_vtid_to_ctx");
+ }
+ ret = lttng_add_vpid_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_vpid_to_ctx");
+ }
+ ret = lttng_add_cpu_id_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_cpu_id_to_ctx");
+ }
+ ret = lttng_add_interruptible_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_interruptible_to_ctx");
+ }
+ ret = lttng_add_need_reschedule_to_ctx(<tng_static_ctx);
+ if (ret) {
+ printk(KERN_WARNING "Cannot add context lttng_add_need_reschedule_to_ctx");
+ }
+ ret = lttng_add_preemptible_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_preemptible_to_ctx");
+ }
+ ret = lttng_add_migratable_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_migratable_to_ctx");
+ }
+ ret = lttng_add_cgroup_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_cgroup_ns_to_ctx");
+ }
+ ret = lttng_add_ipc_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_ipc_ns_to_ctx");
+ }
+ ret = lttng_add_mnt_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_mnt_ns_to_ctx");
+ }
+ ret = lttng_add_net_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_net_ns_to_ctx");
+ }
+ ret = lttng_add_pid_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_pid_ns_to_ctx");
+ }
+ ret = lttng_add_user_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_user_ns_to_ctx");
+ }
+ ret = lttng_add_uts_ns_to_ctx(<tng_static_ctx);
+ if (ret && ret != -ENOSYS) {
+ printk(KERN_WARNING "Cannot add context lttng_add_uts_ns_to_ctx");
+ }
+ /* TODO: perf counters for filtering */
+ return 0;
+}
+
+void lttng_context_exit(void)
+{
+ lttng_destroy_context(lttng_static_ctx);
+ lttng_static_ctx = NULL;
+}
projects / lttng-modules.git / blobdiff