X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fkernel-ctl%2Fkernel-ctl.c;h=f5efaf328f08858c2eea3e135421218fac1bfc45;hp=839a8600e2a3a94ca3eab38b03863138225758fa;hb=352b58f55f53e7d11fb286ddc26a3bd0ecdd02f5;hpb=b812e5ca9073ddac9cf8db747eb6cf9bea78b85a diff --git a/src/common/kernel-ctl/kernel-ctl.c b/src/common/kernel-ctl/kernel-ctl.c index 839a8600e..f5efaf328 100644 --- a/src/common/kernel-ctl/kernel-ctl.c +++ b/src/common/kernel-ctl/kernel-ctl.c @@ -1,30 +1,23 @@ /* - * Copyright (C) 2011 - Julien Desfossez - * Mathieu Desnoyers - * 2016 - Jérémie Galarneau + * Copyright (C) 2011 Julien Desfossez + * Copyright (C) 2011 Mathieu Desnoyers + * Copyright (C) 2016 Jérémie Galarneau * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2 only, - * as published by the Free Software Foundation. + * SPDX-License-Identifier: GPL-2.0-only * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ +#include "lttng/tracker.h" #define _LGPL_SOURCE #define __USE_LINUX_IOCTL_DEFS #include #include #include -#include +#include +#include #include #include +#include #include "kernel-ctl.h" #include "kernel-ioctl.h" @@ -89,10 +82,12 @@ int kernctl_create_session(int fd) /* open the metadata global channel */ int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) { - struct lttng_kernel_old_channel old_channel; struct lttng_kernel_channel channel; if (lttng_kernel_use_old_abi) { + struct lttng_kernel_old_channel old_channel; + + memset(&old_channel, 0, sizeof(old_channel)); old_channel.overwrite = chops->overwrite; old_channel.subbuf_size = chops->subbuf_size; old_channel.num_subbuf = chops->num_subbuf; @@ -111,6 +106,7 @@ int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) &old_channel); } + memset(&channel, 0, sizeof(channel)); channel.overwrite = chops->overwrite; channel.subbuf_size = chops->subbuf_size; channel.num_subbuf = chops->num_subbuf; @@ -225,6 +221,67 @@ int kernctl_list_tracker_pids(int fd) return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); } +static enum lttng_kernel_tracker_type get_kernel_tracker_type( + enum lttng_process_attr process_attr) +{ + switch (process_attr) { + case LTTNG_PROCESS_ATTR_PROCESS_ID: + return LTTNG_KERNEL_TRACKER_PID; + case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: + return LTTNG_KERNEL_TRACKER_VPID; + case LTTNG_PROCESS_ATTR_USER_ID: + return LTTNG_KERNEL_TRACKER_UID; + case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: + return LTTNG_KERNEL_TRACKER_VUID; + case LTTNG_PROCESS_ATTR_GROUP_ID: + return LTTNG_KERNEL_TRACKER_GID; + case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: + return LTTNG_KERNEL_TRACKER_VGID; + default: + return LTTNG_KERNEL_TRACKER_UNKNOWN; + } +} + +int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id) +{ + struct lttng_kernel_tracker_args args; + + args.id = id; + args.type = get_kernel_tracker_type(process_attr); + if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { + errno = EINVAL; + return -1; + } + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_ID, &args); +} + +int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id) +{ + struct lttng_kernel_tracker_args args; + + args.id = id; + args.type = get_kernel_tracker_type(process_attr); + if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { + errno = EINVAL; + return -1; + } + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_ID, &args); +} + +int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr) +{ + struct lttng_kernel_tracker_args args; + + args.id = -1; + args.type = get_kernel_tracker_type(process_attr); + if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { + errno = EINVAL; + return -1; + } + return LTTNG_IOCTL_NO_CHECK( + fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS, &args); +} + int kernctl_session_regenerate_metadata(int fd) { return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); @@ -235,6 +292,39 @@ int kernctl_session_regenerate_statedump(int fd) return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP); } +int kernctl_session_set_name(int fd, const char *name) +{ + int ret; + struct lttng_kernel_session_name session_name; + + ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); + if (ret) { + goto end; + } + + ret = LTTNG_IOCTL_CHECK( + fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name); +end: + return ret; +} + +int kernctl_session_set_creation_time(int fd, time_t time) +{ + int ret; + struct lttng_kernel_session_creation_time creation_time; + + ret = time_to_iso8601_str(time, creation_time.iso8601, + sizeof(creation_time.iso8601)); + if (ret) { + goto end; + } + + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_SET_CREATION_TIME, + &creation_time); +end: + return ret; +} + int kernctl_create_stream(int fd) { return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, @@ -246,6 +336,7 @@ int kernctl_create_event(int fd, struct lttng_kernel_event *ev) if (lttng_kernel_use_old_abi) { struct lttng_kernel_old_event old_event; + memset(&old_event, 0, sizeof(old_event)); memcpy(old_event.name, ev->name, sizeof(old_event.name)); old_event.instrumentation = ev->instrumentation; switch (ev->instrumentation) { @@ -283,6 +374,7 @@ int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) if (lttng_kernel_use_old_abi) { struct lttng_kernel_old_context old_ctx; + memset(&old_ctx, 0, sizeof(old_ctx)); old_ctx.ctx = ctx->ctx; /* only type that uses the union */ if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { @@ -326,7 +418,26 @@ int kernctl_stop_session(int fd) LTTNG_KERNEL_SESSION_STOP); } -int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) +int kernctl_create_event_notifier_group(int fd) +{ + return LTTNG_IOCTL_NO_CHECK(fd, + LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_CREATE); +} + +int kernctl_create_event_notifier_group_notification_fd(int group_fd) +{ + return LTTNG_IOCTL_NO_CHECK(group_fd, + LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD); +} + +int kernctl_create_event_notifier(int group_fd, + const struct lttng_kernel_event_notifier *event_notifier) +{ + return LTTNG_IOCTL_NO_CHECK(group_fd, + LTTNG_KERNEL_EVENT_NOTIFIER_CREATE, event_notifier); +} + +int kernctl_filter(int fd, const struct lttng_filter_bytecode *filter) { struct lttng_kernel_filter_bytecode *kb; uint32_t len; @@ -345,6 +456,11 @@ int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) return ret; } +int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite); +} + int kernctl_tracepoint_list(int fd) { return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, @@ -403,12 +519,33 @@ int kernctl_buffer_flush(int fd) return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH); } +int kernctl_buffer_flush_empty(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY); +} + +int kernctl_buffer_clear(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_CLEAR); +} + +int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent) +{ + return LTTNG_IOCTL_NO_CHECK(fd, + RING_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK, + consistent); +} + /* returns the version of the metadata. */ int kernctl_get_metadata_version(int fd, uint64_t *version) { return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version); } +int kernctl_metadata_cache_dump(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP); +} /* Buffer operations */ @@ -470,6 +607,16 @@ int kernctl_snapshot(int fd) return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT); } +/* + * Get a snapshot of the current ring buffer producer and consumer positions, + * regardless of whether or not the two positions are contained within the + * same sub-buffer. + */ +int kernctl_snapshot_sample_positions(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); +} + /* Get the consumer position (iteration start) */ int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) {