From dc923e75c174ee4e7a80e5f9af1dfd39fb8346ea Mon Sep 17 00:00:00 2001 From: Michael Jeanson Date: Tue, 12 Feb 2019 09:47:00 -0500 Subject: [PATCH] Add uid/gid contexts Add a context for each available kernel user and group IDs * uid : real user ID * euid : effective user ID * suid : saved set-user ID These are the IDs as seen in the initial user namespace, see credentials(7) for details on each type. Also add a "virtual" version of each type with the "v" prefix that are the IDs as seen in the current user namespace. Signed-off-by: Michael Jeanson Signed-off-by: Mathieu Desnoyers --- Makefile | 12 +++++++ lttng-abi.c | 24 +++++++++++++ lttng-abi.h | 12 +++++++ lttng-context-egid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-euid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-gid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-sgid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-suid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-uid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-vegid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-veuid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-vgid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-vsgid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-vsuid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-context-vuid.c | 76 ++++++++++++++++++++++++++++++++++++++++ lttng-events.h | 13 +++++++ wrapper/user_namespace.h | 61 ++++++++++++++++++++++++++++++++ 17 files changed, 1034 insertions(+) create mode 100644 lttng-context-egid.c create mode 100644 lttng-context-euid.c create mode 100644 lttng-context-gid.c create mode 100644 lttng-context-sgid.c create mode 100644 lttng-context-suid.c create mode 100644 lttng-context-uid.c create mode 100644 lttng-context-vegid.c create mode 100644 lttng-context-veuid.c create mode 100644 lttng-context-vgid.c create mode 100644 lttng-context-vsgid.c create mode 100644 lttng-context-vsuid.c create mode 100644 lttng-context-vuid.c create mode 100644 wrapper/user_namespace.h diff --git a/Makefile b/Makefile index 9b3e6c22..709b5dc0 100644 --- a/Makefile +++ b/Makefile @@ -48,6 +48,18 @@ ifneq ($(KERNELRELEASE),) lttng-context-vpid.o lttng-context-tid.o \ lttng-context-vtid.o lttng-context-ppid.o \ lttng-context-vppid.o lttng-context-cpu-id.o \ + lttng-context-uid.o \ + lttng-context-euid.o \ + lttng-context-suid.o \ + lttng-context-gid.o \ + lttng-context-egid.o \ + lttng-context-sgid.o \ + lttng-context-vuid.o \ + lttng-context-veuid.o \ + lttng-context-vsuid.o \ + lttng-context-vgid.o \ + lttng-context-vegid.o \ + lttng-context-vsgid.o \ lttng-context-interruptible.o \ lttng-context-need-reschedule.o \ lttng-context-callstack.o lttng-calibrate.o \ diff --git a/lttng-abi.c b/lttng-abi.c index 34dd8f80..d9e85dc2 100644 --- a/lttng-abi.c +++ b/lttng-abi.c @@ -250,6 +250,30 @@ long lttng_abi_add_context(struct file *file, return lttng_add_user_ns_to_ctx(ctx); case LTTNG_KERNEL_CONTEXT_UTS_NS: return lttng_add_uts_ns_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_UID: + return lttng_add_uid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_EUID: + return lttng_add_euid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_SUID: + return lttng_add_suid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_GID: + return lttng_add_gid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_EGID: + return lttng_add_egid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_SGID: + return lttng_add_sgid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_VUID: + return lttng_add_vuid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_VEUID: + return lttng_add_veuid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_VSUID: + return lttng_add_vsuid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_VGID: + return lttng_add_vgid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_VEGID: + return lttng_add_vegid_to_ctx(ctx); + case LTTNG_KERNEL_CONTEXT_VSGID: + return lttng_add_vsgid_to_ctx(ctx); default: return -EINVAL; } diff --git a/lttng-abi.h b/lttng-abi.h index 91fe67f7..f61a6a15 100644 --- a/lttng-abi.h +++ b/lttng-abi.h @@ -168,6 +168,18 @@ enum lttng_kernel_context_type { LTTNG_KERNEL_CONTEXT_PID_NS = 22, LTTNG_KERNEL_CONTEXT_USER_NS = 23, LTTNG_KERNEL_CONTEXT_UTS_NS = 24, + LTTNG_KERNEL_CONTEXT_UID = 25, + LTTNG_KERNEL_CONTEXT_EUID = 26, + LTTNG_KERNEL_CONTEXT_SUID = 27, + LTTNG_KERNEL_CONTEXT_GID = 28, + LTTNG_KERNEL_CONTEXT_EGID = 29, + LTTNG_KERNEL_CONTEXT_SGID = 30, + LTTNG_KERNEL_CONTEXT_VUID = 31, + LTTNG_KERNEL_CONTEXT_VEUID = 32, + LTTNG_KERNEL_CONTEXT_VSUID = 33, + LTTNG_KERNEL_CONTEXT_VGID = 34, + LTTNG_KERNEL_CONTEXT_VEGID = 35, + LTTNG_KERNEL_CONTEXT_VSGID = 36, }; struct lttng_kernel_perf_counter_ctx { diff --git a/lttng-context-egid.c b/lttng-context-egid.c new file mode 100644 index 00000000..51536e28 --- /dev/null +++ b/lttng-context-egid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-egid.c + * + * LTTng effective group ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t egid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(gid_t)); + size += sizeof(gid_t); + return size; +} + +static +void egid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + gid_t egid; + + egid = lttng_current_egid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(egid)); + chan->ops->event_write(ctx, &egid, sizeof(egid)); +} + +static +void egid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_egid(); +} + +int lttng_add_egid_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, "egid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "egid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(gid_t); + 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 = egid_get_size; + field->record = egid_record; + field->get_value = egid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_egid_to_ctx); diff --git a/lttng-context-euid.c b/lttng-context-euid.c new file mode 100644 index 00000000..1bcd53f6 --- /dev/null +++ b/lttng-context-euid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-euid.c + * + * LTTng effective user ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t euid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(uid_t)); + size += sizeof(uid_t); + return size; +} + +static +void euid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + uid_t euid; + + euid = lttng_current_euid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(euid)); + chan->ops->event_write(ctx, &euid, sizeof(euid)); +} + +static +void euid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_euid(); +} + +int lttng_add_euid_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, "euid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "euid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uid_t); + 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 = euid_get_size; + field->record = euid_record; + field->get_value = euid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_euid_to_ctx); diff --git a/lttng-context-gid.c b/lttng-context-gid.c new file mode 100644 index 00000000..da54207e --- /dev/null +++ b/lttng-context-gid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-gid.c + * + * LTTng real group ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t gid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(gid_t)); + size += sizeof(gid_t); + return size; +} + +static +void gid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + gid_t gid; + + gid = lttng_current_gid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(gid)); + chan->ops->event_write(ctx, &gid, sizeof(gid)); +} + +static +void gid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_gid(); +} + +int lttng_add_gid_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, "gid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "gid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(gid_t); + 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 = gid_get_size; + field->record = gid_record; + field->get_value = gid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_gid_to_ctx); diff --git a/lttng-context-sgid.c b/lttng-context-sgid.c new file mode 100644 index 00000000..61c8d533 --- /dev/null +++ b/lttng-context-sgid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-sgid.c + * + * LTTng saved set-group-ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t sgid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(gid_t)); + size += sizeof(gid_t); + return size; +} + +static +void sgid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + gid_t sgid; + + sgid = lttng_current_sgid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(sgid)); + chan->ops->event_write(ctx, &sgid, sizeof(sgid)); +} + +static +void sgid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_sgid(); +} + +int lttng_add_sgid_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, "sgid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "sgid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(gid_t); + 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 = sgid_get_size; + field->record = sgid_record; + field->get_value = sgid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_sgid_to_ctx); diff --git a/lttng-context-suid.c b/lttng-context-suid.c new file mode 100644 index 00000000..66d3ef5a --- /dev/null +++ b/lttng-context-suid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-suid.c + * + * LTTng saved set-user-ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t suid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(uid_t)); + size += sizeof(uid_t); + return size; +} + +static +void suid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + uid_t suid; + + suid = lttng_current_suid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(suid)); + chan->ops->event_write(ctx, &suid, sizeof(suid)); +} + +static +void suid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_suid(); +} + +int lttng_add_suid_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, "suid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "suid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uid_t); + 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 = suid_get_size; + field->record = suid_record; + field->get_value = suid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_suid_to_ctx); diff --git a/lttng-context-uid.c b/lttng-context-uid.c new file mode 100644 index 00000000..5f11de23 --- /dev/null +++ b/lttng-context-uid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-uid.c + * + * LTTng real user ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t uid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(uid_t)); + size += sizeof(uid_t); + return size; +} + +static +void uid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + uid_t uid; + + uid = lttng_current_uid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(uid)); + chan->ops->event_write(ctx, &uid, sizeof(uid)); +} + +static +void uid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_uid(); +} + +int lttng_add_uid_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, "uid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "uid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uid_t); + 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 = uid_get_size; + field->record = uid_record; + field->get_value = uid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_uid_to_ctx); diff --git a/lttng-context-vegid.c b/lttng-context-vegid.c new file mode 100644 index 00000000..604da2a0 --- /dev/null +++ b/lttng-context-vegid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-vegid.c + * + * LTTng namespaced effective group ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t vegid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(gid_t)); + size += sizeof(gid_t); + return size; +} + +static +void vegid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + gid_t vegid; + + vegid = lttng_current_vegid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(vegid)); + chan->ops->event_write(ctx, &vegid, sizeof(vegid)); +} + +static +void vegid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_vegid(); +} + +int lttng_add_vegid_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, "vegid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "vegid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(gid_t); + 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 = vegid_get_size; + field->record = vegid_record; + field->get_value = vegid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_vegid_to_ctx); diff --git a/lttng-context-veuid.c b/lttng-context-veuid.c new file mode 100644 index 00000000..983ae6a3 --- /dev/null +++ b/lttng-context-veuid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-veuid.c + * + * LTTng namespaced effective user ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t veuid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(uid_t)); + size += sizeof(uid_t); + return size; +} + +static +void veuid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + uid_t veuid; + + veuid = lttng_current_veuid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(veuid)); + chan->ops->event_write(ctx, &veuid, sizeof(veuid)); +} + +static +void veuid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_veuid(); +} + +int lttng_add_veuid_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, "veuid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "veuid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uid_t); + 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 = veuid_get_size; + field->record = veuid_record; + field->get_value = veuid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_veuid_to_ctx); diff --git a/lttng-context-vgid.c b/lttng-context-vgid.c new file mode 100644 index 00000000..e08c77df --- /dev/null +++ b/lttng-context-vgid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-vgid.c + * + * LTTng namespaced real group ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t vgid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(gid_t)); + size += sizeof(gid_t); + return size; +} + +static +void vgid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + gid_t vgid; + + vgid = lttng_current_vgid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(vgid)); + chan->ops->event_write(ctx, &vgid, sizeof(vgid)); +} + +static +void vgid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_vgid(); +} + +int lttng_add_vgid_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, "vgid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "vgid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(gid_t); + 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 = vgid_get_size; + field->record = vgid_record; + field->get_value = vgid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_vgid_to_ctx); diff --git a/lttng-context-vsgid.c b/lttng-context-vsgid.c new file mode 100644 index 00000000..aca5eda0 --- /dev/null +++ b/lttng-context-vsgid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-vsgid.c + * + * LTTng namespaced saved set-group-ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t vsgid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(gid_t)); + size += sizeof(gid_t); + return size; +} + +static +void vsgid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + gid_t vsgid; + + vsgid = lttng_current_vsgid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(vsgid)); + chan->ops->event_write(ctx, &vsgid, sizeof(vsgid)); +} + +static +void vsgid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_vsgid(); +} + +int lttng_add_vsgid_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, "vsgid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "vsgid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(gid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(gid_t); + 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 = vsgid_get_size; + field->record = vsgid_record; + field->get_value = vsgid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_vsgid_to_ctx); diff --git a/lttng-context-vsuid.c b/lttng-context-vsuid.c new file mode 100644 index 00000000..66c1300c --- /dev/null +++ b/lttng-context-vsuid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-vsuid.c + * + * LTTng namespaced saved set-user-ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t vsuid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(uid_t)); + size += sizeof(uid_t); + return size; +} + +static +void vsuid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + uid_t vsuid; + + vsuid = lttng_current_vsuid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(vsuid)); + chan->ops->event_write(ctx, &vsuid, sizeof(vsuid)); +} + +static +void vsuid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_vsuid(); +} + +int lttng_add_vsuid_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, "vsuid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "vsuid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uid_t); + 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 = vsuid_get_size; + field->record = vsuid_record; + field->get_value = vsuid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_vsuid_to_ctx); diff --git a/lttng-context-vuid.c b/lttng-context-vuid.c new file mode 100644 index 00000000..6ae575f5 --- /dev/null +++ b/lttng-context-vuid.c @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * lttng-context-vuid.c + * + * LTTng namespaced real user ID context. + * + * Copyright (C) 2009-2012 Mathieu Desnoyers + * 2019 Michael Jeanson + * + */ + +#include +#include +#include +#include +#include +#include +#include + +static +size_t vuid_get_size(size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(uid_t)); + size += sizeof(uid_t); + return size; +} + +static +void vuid_record(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct lttng_channel *chan) +{ + uid_t vuid; + + vuid = lttng_current_vuid(); + lib_ring_buffer_align_ctx(ctx, lttng_alignof(vuid)); + chan->ops->event_write(ctx, &vuid, sizeof(vuid)); +} + +static +void vuid_get_value(struct lttng_ctx_field *field, + struct lttng_probe_ctx *lttng_probe_ctx, + union lttng_ctx_value *value) +{ + value->s64 = lttng_current_vuid(); +} + +int lttng_add_vuid_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, "vuid")) { + lttng_remove_context_field(ctx, field); + return -EEXIST; + } + field->event_field.name = "vuid"; + field->event_field.type.atype = atype_integer; + field->event_field.type.u.basic.integer.size = sizeof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.alignment = lttng_alignof(uid_t) * CHAR_BIT; + field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(uid_t); + 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 = vuid_get_size; + field->record = vuid_record; + field->get_value = vuid_get_value; + lttng_context_update(*ctx); + wrapper_vmalloc_sync_all(); + return 0; +} +EXPORT_SYMBOL_GPL(lttng_add_vuid_to_ctx); diff --git a/lttng-events.h b/lttng-events.h index fe6e2849..cdb520e8 100644 --- a/lttng-events.h +++ b/lttng-events.h @@ -796,6 +796,19 @@ int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx) } #endif +int lttng_add_uid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_euid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_suid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_gid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_egid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_sgid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); + #if defined(CONFIG_PERF_EVENTS) int lttng_add_perf_counter_to_ctx(uint32_t type, uint64_t config, diff --git a/wrapper/user_namespace.h b/wrapper/user_namespace.h new file mode 100644 index 00000000..701f3189 --- /dev/null +++ b/wrapper/user_namespace.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * + * wrapper/user_namespace.h + * + * Copyright (C) 2019 Michael Jeanson + * + */ + +#ifndef _LTTNG_WRAPPER_USER_NAMESPACE_H +#define _LTTNG_WRAPPER_USER_NAMESPACE_H + +#include +#include + + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0) + +#define lttng_current_xxuid(xxx) \ + (from_kuid_munged(&init_user_ns, current_##xxx())) + +#define lttng_current_vxxuid(xxx) \ + (from_kuid_munged(current_user_ns(), current_##xxx())) + +#define lttng_current_xxgid(xxx) \ + (from_kgid_munged(&init_user_ns, current_##xxx())) + +#define lttng_current_vxxgid(xxx) \ + (from_kgid_munged(current_user_ns(), current_##xxx())) + +#else + +#define lttng_current_xxuid(xxx) (current_##xxx()) + +#define lttng_current_vxxuid(xxx) \ + (user_ns_map_uid(current_user_ns(), current_cred(), current_##xxx())) + +#define lttng_current_xxgid(xxx) (current_##xxx()) + +#define lttng_current_vxxgid(xxx) \ + (user_ns_map_gid(current_user_ns(), current_cred(), current_##xxx())) +#endif + +#define lttng_current_uid() (lttng_current_xxuid(uid)) +#define lttng_current_euid() (lttng_current_xxuid(euid)) +#define lttng_current_suid() (lttng_current_xxuid(suid)) +#define lttng_current_fsuid() (lttng_current_xxuid(fsuid)) +#define lttng_current_gid() (lttng_current_xxgid(gid)) +#define lttng_current_egid() (lttng_current_xxgid(egid)) +#define lttng_current_sgid() (lttng_current_xxgid(sgid)) +#define lttng_current_fsgid() (lttng_current_xxgid(fsgid)) + +#define lttng_current_vuid() (lttng_current_vxxuid(uid)) +#define lttng_current_veuid() (lttng_current_vxxuid(euid)) +#define lttng_current_vsuid() (lttng_current_vxxuid(suid)) +#define lttng_current_vfsuid() (lttng_current_vxxuid(fsuid)) +#define lttng_current_vgid() (lttng_current_vxxgid(gid)) +#define lttng_current_vegid() (lttng_current_vxxgid(egid)) +#define lttng_current_vsgid() (lttng_current_vxxgid(sgid)) +#define lttng_current_vfsgid() (lttng_current_vxxgid(fsgid)) + +#endif /* _LTTNG_WRAPPER_USER_NAMESPACE_H */ -- 2.34.1