X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=ltt-sessiond%2Fkernel-ctl.c;fp=ltt-sessiond%2Fkernel-ctl.c;h=0000000000000000000000000000000000000000;hp=203c01050e82199f34128d09b9c5dd95ca6fb0a4;hb=322585731ced1adba36cddcb8bdd5d997d1b2e3e;hpb=1316184615e422526ef4fae68f980443414969c1

diff --git a/ltt-sessiond/kernel-ctl.c b/ltt-sessiond/kernel-ctl.c
deleted file mode 100644
index 203c01050..000000000
--- a/ltt-sessiond/kernel-ctl.c
+++ /dev/null
@@ -1,607 +0,0 @@
-/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; only version 2
- * of the License.
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
- */
-
-#define _GNU_SOURCE
-#include <errno.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <lttng-kernel-ctl.h>
-#include <lttngerr.h>
-
-#include "kernel-ctl.h"
-
-/*
- * Add context on a kernel channel.
- */
-int kernel_add_channel_context(struct ltt_kernel_channel *chan,
-		struct lttng_kernel_context *ctx)
-{
-	int ret;
-
-	DBG("Adding context to channel %s", chan->channel->name);
-	ret = kernctl_add_context(chan->fd, ctx);
-	if (ret < 0) {
-		if (errno != EEXIST) {
-			perror("add context ioctl");
-		} else {
-			/* If EEXIST, we just ignore the error */
-			ret = 0;
-		}
-		goto error;
-	}
-
-	chan->ctx = malloc(sizeof(struct lttng_kernel_context));
-	if (chan->ctx == NULL) {
-		perror("malloc event context");
-		goto error;
-	}
-
-	memcpy(chan->ctx, ctx, sizeof(struct lttng_kernel_context));
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Add context on a kernel event.
- */
-int kernel_add_event_context(struct ltt_kernel_event *event,
-		struct lttng_kernel_context *ctx)
-{
-	int ret;
-
-	DBG("Adding context to event %s", event->event->name);
-	ret = kernctl_add_context(event->fd, ctx);
-	if (ret < 0) {
-		perror("add context ioctl");
-		goto error;
-	}
-
-	event->ctx = malloc(sizeof(struct lttng_kernel_context));
-	if (event->ctx == NULL) {
-		perror("malloc event context");
-		goto error;
-	}
-
-	memcpy(event->ctx, ctx, sizeof(struct lttng_kernel_context));
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Create a new kernel session, register it to the kernel tracer and add it to
- * the session daemon session.
- */
-int kernel_create_session(struct ltt_session *session, int tracer_fd)
-{
-	int ret;
-	struct ltt_kernel_session *lks;
-
-	/* Allocate data structure */
-	lks = trace_kernel_create_session(session->path);
-	if (lks == NULL) {
-		ret = -1;
-		goto error;
-	}
-
-	/* Kernel tracer session creation */
-	ret = kernctl_create_session(tracer_fd);
-	if (ret < 0) {
-		perror("ioctl kernel create session");
-		goto error;
-	}
-
-	lks->fd = ret;
-	/* Prevent fd duplication after execlp() */
-	ret = fcntl(lks->fd, F_SETFD, FD_CLOEXEC);
-	if (ret < 0) {
-		perror("fcntl session fd");
-	}
-
-	lks->consumer_fds_sent = 0;
-	session->kernel_session = lks;
-
-	DBG("Kernel session created (fd: %d)", lks->fd);
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Create a kernel channel, register it to the kernel tracer and add it to the
- * kernel session.
- */
-int kernel_create_channel(struct ltt_kernel_session *session,
-		struct lttng_channel *chan, char *path)
-{
-	int ret;
-	struct ltt_kernel_channel *lkc;
-
-	/* Allocate kernel channel */
-	lkc = trace_kernel_create_channel(chan, path);
-	if (lkc == NULL) {
-		goto error;
-	}
-
-	/* Kernel tracer channel creation */
-	ret = kernctl_create_channel(session->fd, &lkc->channel->attr);
-	if (ret < 0) {
-		perror("ioctl kernel create channel");
-		goto error;
-	}
-
-	/* Setup the channel fd */
-	lkc->fd = ret;
-	/* Prevent fd duplication after execlp() */
-	ret = fcntl(lkc->fd, F_SETFD, FD_CLOEXEC);
-	if (ret < 0) {
-		perror("fcntl session fd");
-	}
-
-	/* Add channel to session */
-	cds_list_add(&lkc->list, &session->channel_list.head);
-	session->channel_count++;
-
-	DBG("Kernel channel %s created (fd: %d and path: %s)",
-			lkc->channel->name, lkc->fd, lkc->pathname);
-
-	return 0;
-
-error:
-	return -1;
-}
-
-/*
- * Create a kernel event, enable it to the kernel tracer and add it to the
- * channel event list of the kernel session.
- */
-int kernel_create_event(struct lttng_event *ev,
-		struct ltt_kernel_channel *channel)
-{
-	int ret;
-	struct ltt_kernel_event *event;
-
-	event = trace_kernel_create_event(ev);
-	if (event == NULL) {
-		ret = -1;
-		goto error;
-	}
-
-	ret = kernctl_create_event(channel->fd, event->event);
-	if (ret < 0) {
-		if (errno != EEXIST) {
-			PERROR("create event ioctl");
-		}
-		ret = -errno;
-		goto free_event;
-	}
-
-	/*
-	 * LTTNG_KERNEL_SYSCALL event creation will return 0 on success. However
-	 * this FD must not be added to the event list.
-	 */
-	if (ret == 0 && event->event->instrumentation == LTTNG_KERNEL_SYSCALL) {
-		DBG2("Kernel event syscall creation success");
-		goto end;
-	}
-
-	event->fd = ret;
-	/* Prevent fd duplication after execlp() */
-	ret = fcntl(event->fd, F_SETFD, FD_CLOEXEC);
-	if (ret < 0) {
-		perror("fcntl session fd");
-	}
-
-	/* Add event to event list */
-	cds_list_add(&event->list, &channel->events_list.head);
-	channel->event_count++;
-
-	DBG("Event %s created (fd: %d)", ev->name, event->fd);
-
-end:
-	return 0;
-
-free_event:
-	free(event);
-error:
-	return ret;
-}
-
-/*
- * Disable a kernel channel.
- */
-int kernel_disable_channel(struct ltt_kernel_channel *chan)
-{
-	int ret;
-
-	ret = kernctl_disable(chan->fd);
-	if (ret < 0) {
-		perror("disable chan ioctl");
-		ret = errno;
-		goto error;
-	}
-
-	chan->enabled = 0;
-	DBG("Kernel channel %s disabled (fd: %d)", chan->channel->name, chan->fd);
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Enable a kernel channel.
- */
-int kernel_enable_channel(struct ltt_kernel_channel *chan)
-{
-	int ret;
-
-	ret = kernctl_enable(chan->fd);
-	if (ret < 0 && errno != EEXIST) {
-		perror("Enable kernel chan");
-		goto error;
-	}
-
-	chan->enabled = 1;
-	DBG("Kernel channel %s enabled (fd: %d)", chan->channel->name, chan->fd);
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Enable a kernel event.
- */
-int kernel_enable_event(struct ltt_kernel_event *event)
-{
-	int ret;
-
-	ret = kernctl_enable(event->fd);
-	if (ret < 0 && errno != EEXIST) {
-		perror("enable kernel event");
-		goto error;
-	}
-
-	event->enabled = 1;
-	DBG("Kernel event %s enabled (fd: %d)", event->event->name, event->fd);
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Disable a kernel event.
- */
-int kernel_disable_event(struct ltt_kernel_event *event)
-{
-	int ret;
-
-	ret = kernctl_disable(event->fd);
-	if (ret < 0 && errno != EEXIST) {
-		perror("disable kernel event");
-		goto error;
-	}
-
-	event->enabled = 0;
-	DBG("Kernel event %s disabled (fd: %d)", event->event->name, event->fd);
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Create kernel metadata, open from the kernel tracer and add it to the
- * kernel session.
- */
-int kernel_open_metadata(struct ltt_kernel_session *session, char *path)
-{
-	int ret;
-	struct ltt_kernel_metadata *lkm;
-
-	/* Allocate kernel metadata */
-	lkm = trace_kernel_create_metadata(path);
-	if (lkm == NULL) {
-		goto error;
-	}
-
-	/* Kernel tracer metadata creation */
-	ret = kernctl_open_metadata(session->fd, &lkm->conf->attr);
-	if (ret < 0) {
-		goto error;
-	}
-
-	lkm->fd = ret;
-	/* Prevent fd duplication after execlp() */
-	ret = fcntl(lkm->fd, F_SETFD, FD_CLOEXEC);
-	if (ret < 0) {
-		perror("fcntl session fd");
-	}
-
-	session->metadata = lkm;
-
-	DBG("Kernel metadata opened (fd: %d and path: %s)", lkm->fd, lkm->pathname);
-
-	return 0;
-
-error:
-	return -1;
-}
-
-/*
- * Start tracing session.
- */
-int kernel_start_session(struct ltt_kernel_session *session)
-{
-	int ret;
-
-	ret = kernctl_start_session(session->fd);
-	if (ret < 0) {
-		perror("ioctl start session");
-		goto error;
-	}
-
-	DBG("Kernel session started");
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Make a kernel wait to make sure in-flight probe have completed.
- */
-void kernel_wait_quiescent(int fd)
-{
-	int ret;
-
-	DBG("Kernel quiescent wait on %d", fd);
-
-	ret = kernctl_wait_quiescent(fd);
-	if (ret < 0) {
-		perror("wait quiescent ioctl");
-		ERR("Kernel quiescent wait failed");
-	}
-}
-
-/*
- * Kernel calibrate
- */
-int kernel_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
-{
-	int ret;
-
-	ret = kernctl_calibrate(fd, calibrate);
-	if (ret < 0) {
-		perror("calibrate ioctl");
-		return -1;
-	}
-
-	return 0;
-}
-
-
-/*
- *  Force flush buffer of metadata.
- */
-int kernel_metadata_flush_buffer(int fd)
-{
-	int ret;
-
-	ret = kernctl_buffer_flush(fd);
-	if (ret < 0) {
-		ERR("Fail to flush metadata buffers %d (ret: %d", fd, ret);
-	}
-
-	return 0;
-}
-
-/*
- * Force flush buffer for channel.
- */
-int kernel_flush_buffer(struct ltt_kernel_channel *channel)
-{
-	int ret;
-	struct ltt_kernel_stream *stream;
-
-	DBG("Flush buffer for channel %s", channel->channel->name);
-
-	cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
-		DBG("Flushing channel stream %d", stream->fd);
-		ret = kernctl_buffer_flush(stream->fd);
-		if (ret < 0) {
-			perror("ioctl");
-			ERR("Fail to flush buffer for stream %d (ret: %d)",
-					stream->fd, ret);
-		}
-	}
-
-	return 0;
-}
-
-/*
- * Stop tracing session.
- */
-int kernel_stop_session(struct ltt_kernel_session *session)
-{
-	int ret;
-
-	ret = kernctl_stop_session(session->fd);
-	if (ret < 0) {
-		goto error;
-	}
-
-	DBG("Kernel session stopped");
-
-	return 0;
-
-error:
-	return ret;
-}
-
-/*
- * Open stream of channel, register it to the kernel tracer and add it
- * to the stream list of the channel.
- *
- * Return the number of created stream. Else, a negative value.
- */
-int kernel_open_channel_stream(struct ltt_kernel_channel *channel)
-{
-	int ret;
-	struct ltt_kernel_stream *lks;
-
-	while ((ret = kernctl_create_stream(channel->fd)) > 0) {
-		lks = trace_kernel_create_stream();
-		if (lks == NULL) {
-			close(ret);
-			goto error;
-		}
-
-		lks->fd = ret;
-		/* Prevent fd duplication after execlp() */
-		ret = fcntl(lks->fd, F_SETFD, FD_CLOEXEC);
-		if (ret < 0) {
-			perror("fcntl session fd");
-		}
-
-		ret = asprintf(&lks->pathname, "%s/%s_%d",
-				channel->pathname, channel->channel->name, channel->stream_count);
-		if (ret < 0) {
-			perror("asprintf kernel create stream");
-			goto error;
-		}
-
-		/* Add stream to channe stream list */
-		cds_list_add(&lks->list, &channel->stream_list.head);
-		channel->stream_count++;
-
-		DBG("Kernel stream %d created (fd: %d, state: %d, path: %s)",
-				channel->stream_count, lks->fd, lks->state, lks->pathname);
-	}
-
-	return channel->stream_count;
-
-error:
-	return -1;
-}
-
-/*
- * Open the metadata stream and set it to the kernel session.
- */
-int kernel_open_metadata_stream(struct ltt_kernel_session *session)
-{
-	int ret;
-
-	ret = kernctl_create_stream(session->metadata->fd);
-	if (ret < 0) {
-		perror("kernel create metadata stream");
-		goto error;
-	}
-
-	DBG("Kernel metadata stream created (fd: %d)", ret);
-	session->metadata_stream_fd = ret;
-	/* Prevent fd duplication after execlp() */
-	ret = fcntl(session->metadata_stream_fd, F_SETFD, FD_CLOEXEC);
-	if (ret < 0) {
-		perror("fcntl session fd");
-	}
-
-	return 0;
-
-error:
-	return -1;
-}
-
-/*
- * Get the event list from the kernel tracer and return the number of elements.
- */
-ssize_t kernel_list_events(int tracer_fd, struct lttng_event **events)
-{
-	int fd, pos;
-	char *event;
-	size_t nbmem, count = 0;
-	ssize_t size;
-	FILE *fp;
-	struct lttng_event *elist;
-
-	fd = kernctl_tracepoint_list(tracer_fd);
-	if (fd < 0) {
-		perror("kernel tracepoint list");
-		goto error;
-	}
-
-	fp = fdopen(fd, "r");
-	if (fp == NULL) {
-		perror("kernel tracepoint list fdopen");
-		goto error_fp;
-	}
-
-	/*
-	 * Init memory size counter
-	 * See kernel-ctl.h for explanation of this value
-	 */
-	nbmem = KERNEL_EVENT_LIST_SIZE;
-	elist = malloc(sizeof(struct lttng_event) * nbmem);
-
-	while ((size = fscanf(fp, "event { name = %m[^;]; };%n\n", &event, &pos)) == 1) {
-		if (count > nbmem) {
-			DBG("Reallocating event list from %zu to %zu bytes", nbmem,
-					nbmem + KERNEL_EVENT_LIST_SIZE);
-			/* Adding the default size again */
-			nbmem += KERNEL_EVENT_LIST_SIZE;
-			elist = realloc(elist, nbmem);
-			if (elist == NULL) {
-				perror("realloc list events");
-				count = -ENOMEM;
-				goto end;
-			}
-		}
-		strncpy(elist[count].name, event, LTTNG_SYMBOL_NAME_LEN);
-		elist[count].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
-		count++;
-	}
-
-	*events = elist;
-	DBG("Kernel list events done (%zu events)", count);
-end:
-	fclose(fp);	/* closes both fp and fd */
-	return count;
-
-error_fp:
-	close(fd);
-error:
-	return -1;
-}