1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
7 * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/sched.h>
13 #include <lttng/events.h>
14 #include <lttng/events-internal.h>
15 #include <ringbuffer/frontend_types.h>
16 #include <wrapper/vmalloc.h>
17 #include <lttng/tracer.h>
20 size_t vpid_get_size(size_t offset
)
24 size
+= lib_ring_buffer_align(offset
, lttng_alignof(pid_t
));
25 size
+= sizeof(pid_t
);
30 void vpid_record(struct lttng_kernel_ctx_field
*field
,
31 struct lib_ring_buffer_ctx
*ctx
,
32 struct lttng_channel
*chan
)
37 * nsproxy can be NULL when scheduled out of exit.
39 if (!current
->nsproxy
)
42 vpid
= task_tgid_vnr(current
);
43 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(vpid
));
44 chan
->ops
->event_write(ctx
, &vpid
, sizeof(vpid
));
48 void vpid_get_value(struct lttng_kernel_ctx_field
*field
,
49 struct lttng_probe_ctx
*lttng_probe_ctx
,
50 union lttng_ctx_value
*value
)
55 * nsproxy can be NULL when scheduled out of exit.
57 if (!current
->nsproxy
)
60 vpid
= task_tgid_vnr(current
);
64 static const struct lttng_kernel_ctx_field
*ctx_field
= lttng_kernel_static_ctx_field(
65 lttng_kernel_static_event_field("vpid",
66 lttng_kernel_static_type_integer_from_type(pid_t
, __BYTE_ORDER
, 10),
74 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
)
78 if (lttng_kernel_find_context(*ctx
, ctx_field
->event_field
->name
))
80 ret
= lttng_kernel_context_append(ctx
, ctx_field
);
81 wrapper_vmalloc_sync_mappings();
84 EXPORT_SYMBOL_GPL(lttng_add_vpid_to_ctx
);
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