endif
endif
+mnt_ns_dep = $(srctree)/fs/mount.h
+ifeq ($(wildcard $(mnt_ns_dep)),)
+ ccflags-y += -DLTTNG_MNT_NS_MISSING_HEADER
+endif
+
# vim:syntax=make
-o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 15 \) ] ; then \
echo "lttng-tracepoint.o" ; fi;)
+ lttng-tracer-objs += lttng-context-cgroup-ns.o
+
+ ifneq ($(CONFIG_IPC_NS),)
+ lttng-tracer-objs += lttng-context-ipc-ns.o
+ endif
+
+ ifneq ($(wildcard $(mnt_ns_dep)),)
+ lttng-tracer-objs += lttng-context-mnt-ns.o
+ endif
+
+ ifneq ($(CONFIG_NET_NS),)
+ lttng-tracer-objs += lttng-context-net-ns.o
+ endif
+
+ ifneq ($(CONFIG_PID_NS),)
+ lttng-tracer-objs += lttng-context-pid-ns.o
+ endif
+
+ ifneq ($(CONFIG_USER_NS),)
+ lttng-tracer-objs += lttng-context-user-ns.o
+ endif
+
+ ifneq ($(CONFIG_UTS_NS),)
+ lttng-tracer-objs += lttng-context-uts-ns.o
+ endif
+
obj-$(CONFIG_LTTNG) += lttng-statedump.o
lttng-statedump-objs := lttng-statedump-impl.o wrapper/irqdesc.o \
wrapper/fdtable.o
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
#include <linux/sched/rt.h>
#endif
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
-#define lttng_proc_inum ns.inum
-#else
-#define lttng_proc_inum proc_inum
-#endif
+#include <wrapper/namespace.h>
#define LTTNG_MAX_PID_NS_LEVEL 32
pid_ns = task_active_pid_ns(parent);
if (pid_ns)
parent_ns_inum =
- pid_ns->lttng_proc_inum;
+ pid_ns->lttng_ns_inum;
}
parent_ns_inum;
}))
pid_ns = task_active_pid_ns(child);
if (pid_ns)
child_ns_inum =
- pid_ns->lttng_proc_inum;
+ pid_ns->lttng_ns_inum;
}
child_ns_inum;
}))
case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL:
case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER:
return lttng_add_callstack_to_ctx(ctx, context_param->ctx);
+ case LTTNG_KERNEL_CONTEXT_CGROUP_NS:
+ return lttng_add_cgroup_ns_to_ctx(ctx);
+ case LTTNG_KERNEL_CONTEXT_IPC_NS:
+ return lttng_add_ipc_ns_to_ctx(ctx);
+ case LTTNG_KERNEL_CONTEXT_MNT_NS:
+ return lttng_add_mnt_ns_to_ctx(ctx);
+ case LTTNG_KERNEL_CONTEXT_NET_NS:
+ return lttng_add_net_ns_to_ctx(ctx);
+ case LTTNG_KERNEL_CONTEXT_PID_NS:
+ return lttng_add_pid_ns_to_ctx(ctx);
+ case LTTNG_KERNEL_CONTEXT_USER_NS:
+ return lttng_add_user_ns_to_ctx(ctx);
+ case LTTNG_KERNEL_CONTEXT_UTS_NS:
+ return lttng_add_uts_ns_to_ctx(ctx);
default:
return -EINVAL;
}
LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
+ LTTNG_KERNEL_CONTEXT_CGROUP_NS = 18,
+ LTTNG_KERNEL_CONTEXT_IPC_NS = 19,
+ LTTNG_KERNEL_CONTEXT_MNT_NS = 20,
+ LTTNG_KERNEL_CONTEXT_NET_NS = 21,
+ LTTNG_KERNEL_CONTEXT_PID_NS = 22,
+ LTTNG_KERNEL_CONTEXT_USER_NS = 23,
+ LTTNG_KERNEL_CONTEXT_UTS_NS = 24,
};
struct lttng_kernel_perf_counter_ctx {
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-cgroup-ns.c
+ *
+ * LTTng cgroup namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/cgroup.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if defined(CONFIG_CGROUPS) && \
+ ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \
+ LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
+
+static
+size_t cgroup_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void cgroup_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ unsigned int cgroup_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ cgroup_ns_inum = current->nsproxy->cgroup_ns->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(cgroup_ns_inum));
+ chan->ops->event_write(ctx, &cgroup_ns_inum, sizeof(cgroup_ns_inum));
+}
+
+static
+void cgroup_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ unsigned int cgroup_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ cgroup_ns_inum = current->nsproxy->cgroup_ns->lttng_ns_inum;
+
+ value->s64 = cgroup_ns_inum;
+}
+
+int lttng_add_cgroup_ns_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, "cgroup_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "cgroup_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = cgroup_ns_get_size;
+ field->record = cgroup_ns_record;
+ field->get_value = cgroup_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_cgroup_ns_to_ctx);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-ipc-ns.c
+ *
+ * LTTng ipc namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/ipc_namespace.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if defined(CONFIG_IPC_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+
+static
+size_t ipc_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void ipc_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ unsigned int ipc_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ ipc_ns_inum = current->nsproxy->ipc_ns->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(ipc_ns_inum));
+ chan->ops->event_write(ctx, &ipc_ns_inum, sizeof(ipc_ns_inum));
+}
+
+static
+void ipc_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ unsigned int ipc_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ ipc_ns_inum = current->nsproxy->ipc_ns->lttng_ns_inum;
+
+ value->s64 = ipc_ns_inum;
+}
+
+int lttng_add_ipc_ns_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, "ipc_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "ipc_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = ipc_ns_get_size;
+ field->record = ipc_ns_record;
+ field->get_value = ipc_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_ipc_ns_to_ctx);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-mnt-ns.c
+ *
+ * LTTng mount namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+
+#include <../fs/mount.h>
+
+static
+size_t mnt_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void mnt_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ unsigned int mnt_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ mnt_ns_inum = current->nsproxy->mnt_ns->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(mnt_ns_inum));
+ chan->ops->event_write(ctx, &mnt_ns_inum, sizeof(mnt_ns_inum));
+}
+
+static
+void mnt_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ unsigned int mnt_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ mnt_ns_inum = current->nsproxy->mnt_ns->lttng_ns_inum;
+
+ value->s64 = mnt_ns_inum;
+}
+
+int lttng_add_mnt_ns_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, "mnt_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "mnt_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = mnt_ns_get_size;
+ field->record = mnt_ns_record;
+ field->get_value = mnt_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_mnt_ns_to_ctx);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-net-ns.c
+ *
+ * LTTng net namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <net/net_namespace.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if defined(CONFIG_NET_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+
+static
+size_t net_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void net_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ unsigned int net_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ net_ns_inum = current->nsproxy->net_ns->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(net_ns_inum));
+ chan->ops->event_write(ctx, &net_ns_inum, sizeof(net_ns_inum));
+}
+
+static
+void net_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ unsigned int net_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ net_ns_inum = current->nsproxy->net_ns->lttng_ns_inum;
+
+ value->s64 = net_ns_inum;
+}
+
+int lttng_add_net_ns_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, "net_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "net_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = net_ns_get_size;
+ field->record = net_ns_record;
+ field->get_value = net_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_net_ns_to_ctx);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-pid-ns.c
+ *
+ * LTTng pid namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/pid_namespace.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if defined(CONFIG_PID_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+
+static
+size_t pid_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void pid_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ struct pid_namespace *ns;
+ unsigned int pid_ns_inum = 0;
+
+ /*
+ * The pid namespace is an exception -- it's accessed using
+ * task_active_pid_ns. The pid namespace in nsproxy is the
+ * namespace that children will use.
+ */
+ ns = task_active_pid_ns(current);
+
+ if (ns)
+ pid_ns_inum = ns->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(pid_ns_inum));
+ chan->ops->event_write(ctx, &pid_ns_inum, sizeof(pid_ns_inum));
+}
+
+static
+void pid_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ struct pid_namespace *ns;
+ unsigned int pid_ns_inum = 0;
+
+ /*
+ * The pid namespace is an exception -- it's accessed using
+ * task_active_pid_ns. The pid namespace in nsproxy is the
+ * namespace that children will use.
+ */
+ ns = task_active_pid_ns(current);
+
+ if (ns)
+ pid_ns_inum = ns->lttng_ns_inum;
+
+ value->s64 = pid_ns_inum;
+}
+
+int lttng_add_pid_ns_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, "pid_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "pid_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = pid_ns_get_size;
+ field->record = pid_ns_record;
+ field->get_value = pid_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_pid_ns_to_ctx);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-user-ns.c
+ *
+ * LTTng user namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/user_namespace.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if defined(CONFIG_USER_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+
+static
+size_t user_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void user_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ unsigned int user_ns_inum = 0;
+
+ if (current_user_ns())
+ user_ns_inum = current_user_ns()->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(user_ns_inum));
+ chan->ops->event_write(ctx, &user_ns_inum, sizeof(user_ns_inum));
+}
+
+static
+void user_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ unsigned int user_ns_inum = 0;
+
+ if (current_user_ns())
+ user_ns_inum = current_user_ns()->lttng_ns_inum;
+
+ value->s64 = user_ns_inum;
+}
+
+int lttng_add_user_ns_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, "user_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "user_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = user_ns_get_size;
+ field->record = user_ns_record;
+ field->get_value = user_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_user_ns_to_ctx);
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * lttng-context-uts-ns.c
+ *
+ * LTTng uts namespace context.
+ *
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/utsname.h>
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <wrapper/namespace.h>
+#include <lttng-tracer.h>
+
+#if defined(CONFIG_UTS_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+
+static
+size_t uts_ns_get_size(size_t offset)
+{
+ size_t size = 0;
+
+ size += lib_ring_buffer_align(offset, lttng_alignof(unsigned int));
+ size += sizeof(unsigned int);
+ return size;
+}
+
+static
+void uts_ns_record(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan)
+{
+ unsigned int uts_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ uts_ns_inum = current->nsproxy->uts_ns->lttng_ns_inum;
+
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(uts_ns_inum));
+ chan->ops->event_write(ctx, &uts_ns_inum, sizeof(uts_ns_inum));
+}
+
+static
+void uts_ns_get_value(struct lttng_ctx_field *field,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ union lttng_ctx_value *value)
+{
+ unsigned int uts_ns_inum = 0;
+
+ /*
+ * nsproxy can be NULL when scheduled out of exit.
+ *
+ * As documented in 'linux/nsproxy.h' namespaces access rules, no
+ * precautions should be taken when accessing the current task's
+ * namespaces, just dereference the pointers.
+ */
+ if (current->nsproxy)
+ uts_ns_inum = current->nsproxy->uts_ns->lttng_ns_inum;
+
+ value->s64 = uts_ns_inum;
+}
+
+int lttng_add_uts_ns_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, "uts_ns")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
+ field->event_field.name = "uts_ns";
+ field->event_field.type.atype = atype_integer;
+ field->event_field.type.u.basic.integer.size = sizeof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned int) * CHAR_BIT;
+ field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned int);
+ field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+ field->event_field.type.u.basic.integer.base = 10;
+ field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+ field->get_size = uts_ns_get_size;
+ field->record = uts_ns_record;
+ field->get_value = uts_ns_get_value;
+ lttng_context_update(*ctx);
+ wrapper_vmalloc_sync_all();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_add_uts_ns_to_ctx);
+
+#endif
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;
}
int lttng_add_callstack_to_ctx(struct lttng_ctx **ctx, int type);
+#if defined(CONFIG_CGROUPS) && \
+ ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \
+ LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
+int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_IPC_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_NET_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_PID_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_USER_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_UTS_NS) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
+int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
#if defined(CONFIG_PERF_EVENTS)
int lttng_add_perf_counter_to_ctx(uint32_t type,
uint64_t config,
--- /dev/null
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
+ * wrapper/namespace.h
+ *
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2019 Michael Jeanson <mjeanson@efficios.com>
+ *
+ */
+
+#ifndef _LTTNG_WRAPPER_NAMESPACE_H
+#define _LTTNG_WRAPPER_NAMESPACE_H
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0))
+#define lttng_ns_inum ns.inum
+#else
+#define lttng_ns_inum proc_inum
+#endif
+
+#endif /* _LTTNG_WRAPPER_NAMESPACE_H */
projects / lttng-modules.git / commitdiff
