Rename "tsc" to "timestamp"

[lttng-modules.git] / lttng-context-vppid.c

diff --git a/lttng-context-vppid.c b/lttng-context-vppid.c
deleted file mode 100644 (file)
index 8757eb2..0000000
--- a/lttng-context-vppid.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * lttng-context-vppid.c
- *
- * LTTng vPPID context.
- *
- * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
-#include <lttng/events.h>
-#include <ringbuffer/frontend_types.h>
-#include <wrapper/vmalloc.h>
-#include <lttng/tracer.h>
-
-static
-size_t vppid_get_size(size_t offset)
-{
-       size_t size = 0;
-
-       size += lib_ring_buffer_align(offset, lttng_alignof(pid_t));
-       size += sizeof(pid_t);
-       return size;
-}
-
-static
-void vppid_record(struct lttng_ctx_field *field,
-                 struct lib_ring_buffer_ctx *ctx,
-                 struct lttng_channel *chan)
-{
-       struct task_struct *parent;
-       pid_t vppid;
-
-       /*
-        * current nsproxy can be NULL when scheduled out of exit. pid_vnr uses
-        * the current thread nsproxy to perform the lookup.
-        */
-
-       /*
-        * TODO: when we eventually add RCU subsystem instrumentation,
-        * taking the rcu read lock here will trigger RCU tracing
-        * recursively. We should modify the kernel synchronization so
-        * it synchronizes both for RCU and RCU sched, and rely on
-        * rcu_read_lock_sched_notrace.
-        */
-
-       rcu_read_lock();
-       parent = rcu_dereference(current->real_parent);
-       if (!current->nsproxy)
-               vppid = 0;
-       else
-               vppid = task_tgid_vnr(parent);
-       rcu_read_unlock();
-       lib_ring_buffer_align_ctx(ctx, lttng_alignof(vppid));
-       chan->ops->event_write(ctx, &vppid, sizeof(vppid));
-}
-
-static
-void vppid_get_value(struct lttng_ctx_field *field,
-               struct lttng_probe_ctx *lttng_probe_ctx,
-               union lttng_ctx_value *value)
-{
-       struct task_struct *parent;
-       pid_t vppid;
-
-       /*
-        * current nsproxy can be NULL when scheduled out of exit. pid_vnr uses
-        * the current thread nsproxy to perform the lookup.
-        */
-
-       /*
-        * TODO: when we eventually add RCU subsystem instrumentation,
-        * taking the rcu read lock here will trigger RCU tracing
-        * recursively. We should modify the kernel synchronization so
-        * it synchronizes both for RCU and RCU sched, and rely on
-        * rcu_read_lock_sched_notrace.
-        */
-
-       rcu_read_lock();
-       parent = rcu_dereference(current->real_parent);
-       if (!current->nsproxy)
-               vppid = 0;
-       else
-               vppid = task_tgid_vnr(parent);
-       rcu_read_unlock();
-       value->s64 = vppid;
-}
-
-int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx)
-{
-       struct lttng_ctx_field *field;
-
-       field = lttng_append_context(ctx);
-       if (!field)
-               return -ENOMEM;
-       if (lttng_find_context(*ctx, "vppid")) {
-               lttng_remove_context_field(ctx, field);
-               return -EEXIST;
-       }
-       field->event_field.name = "vppid";
-       field->event_field.type.atype = atype_integer;
-       field->event_field.type.u.integer.size = sizeof(pid_t) * CHAR_BIT;
-       field->event_field.type.u.integer.alignment = lttng_alignof(pid_t) * CHAR_BIT;
-       field->event_field.type.u.integer.signedness = lttng_is_signed_type(pid_t);
-       field->event_field.type.u.integer.reverse_byte_order = 0;
-       field->event_field.type.u.integer.base = 10;
-       field->event_field.type.u.integer.encoding = lttng_encode_none;
-       field->get_size = vppid_get_size;
-       field->record = vppid_record;
-       field->get_value = vppid_get_value;
-       lttng_context_update(*ctx);
-       wrapper_vmalloc_sync_mappings();
-       return 0;
-}
-EXPORT_SYMBOL_GPL(lttng_add_vppid_to_ctx);