--- /dev/null
+/*
+ * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2014 Jan Glauber <jan.glauber@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+/**
+ * @file modprobe.c
+ *
+ * @brief modprobe related functions.
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+
+#include <common/common.h>
+#include <common/utils.h>
+
+#include "modprobe.h"
+#include "kern-modules.h"
+#include "lttng-sessiond.h"
+
+/* LTTng kernel tracer mandatory core modules list */
+struct kern_modules_param kern_modules_control_core[] = {
+ {
+ .name = (char *) "lttng-ring-buffer-client-discard",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED,
+ },
+ {
+ .name = (char *) "lttng-ring-buffer-client-overwrite",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED,
+ },
+ {
+ .name = (char *) "lttng-ring-buffer-metadata-client",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED,
+ },
+ {
+ .name = (char *) "lttng-ring-buffer-client-mmap-discard",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED,
+ },
+ {
+ .name = (char *) "lttng-ring-buffer-client-mmap-overwrite",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED,
+ },
+ {
+ .name = (char *) "lttng-ring-buffer-metadata-mmap-client",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED,
+ },
+ {
+ .name = (char *) "lttng-ring-buffer-event_notifier-client",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-counter-client-percpu-64-modular",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-counter-client-percpu-32-modular",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+};
+
+/* LTTng kerneltracer probe modules list */
+struct kern_modules_param kern_modules_probes_default[] = {
+ {
+ .name = (char *) "lttng-probe-asoc",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-block",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-btrfs",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-compaction",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-ext3",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-ext4",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-gpio",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-i2c",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-irq",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-jbd",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-jbd2",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-kmem",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-kvm",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-kvm-x86",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-kvm-x86-mmu",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-lock",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-module",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-napi",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-net",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-power",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-preemptirq",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-printk",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-random",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-rcu",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-regmap",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-regulator",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-rpm",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-sched",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-scsi",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-signal",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-skb",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-sock",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-statedump",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-sunrpc",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-timer",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-udp",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-vmscan",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-v4l2",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-workqueue",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-writeback",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-x86-irq-vectors",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+ {
+ .name = (char *) "lttng-probe-x86-exceptions",
+ .load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL,
+ },
+};
+
+/* dynamic probe modules list */
+static struct kern_modules_param *probes;
+static int nr_probes;
+static int probes_capacity;
+
+#if HAVE_KMOD
+#include <libkmod.h>
+
+/**
+ * @brief Logging function for libkmod integration.
+ */
+static void log_kmod(void *data, int priority, const char *file, int line,
+ const char *fn, const char *format, va_list args)
+{
+ char *str;
+
+ if (vasprintf(&str, format, args) < 0) {
+ return;
+ }
+
+ DBG("libkmod: %s", str);
+ free(str);
+}
+
+/**
+ * @brief Setup the libkmod context.
+ *
+ * Create the context, add a custom logging function and preload the
+ * ressources for faster operation.
+ *
+ * @returns \c 0 on success
+ * \c < 0 on error
+ */
+static int setup_kmod_ctx(struct kmod_ctx **ctx)
+{
+ int ret = 0;
+
+ *ctx = kmod_new(NULL, NULL);
+ if (!ctx) {
+ PERROR("Unable to create kmod library context");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ kmod_set_log_fn(*ctx, log_kmod, NULL);
+ ret = kmod_load_resources(*ctx);
+ if (ret < 0) {
+ ERR("Failed to load kmod library resources");
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/**
+ * @brief Loads the kernel modules in \p modules
+ *
+ * @param modules List of modules to load
+ * @param entries Number of modules in the list
+ *
+ * If the modules are required, we will return with error after the
+ * first failed module load, otherwise we continue loading.
+ *
+ * @returns \c 0 on success
+ * \c < 0 on error
+ */
+static int modprobe_lttng(struct kern_modules_param *modules,
+ int entries)
+{
+ int ret = 0, i;
+ struct kmod_ctx *ctx;
+
+ ret = setup_kmod_ctx(&ctx);
+ if (ret < 0) {
+ goto error;
+ }
+
+ for (i = 0; i < entries; i++) {
+ struct kmod_module *mod = NULL;
+
+ ret = kmod_module_new_from_name(ctx, modules[i].name, &mod);
+ if (ret < 0) {
+ PERROR("Failed to create kmod module for %s", modules[i].name);
+ goto error;
+ }
+
+ ret = kmod_module_probe_insert_module(mod, 0,
+ NULL, NULL, NULL, NULL);
+ if (ret == -EEXIST) {
+ DBG("Module %s is already loaded", modules[i].name);
+ ret = 0;
+ } else if (ret < 0) {
+ if (modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED) {
+ ERR("Unable to load required module %s",
+ modules[i].name);
+ goto error;
+ } else {
+ DBG("Unable to load optional module %s; continuing",
+ modules[i].name);
+ ret = 0;
+ }
+ } else {
+ DBG("Modprobe successfully %s", modules[i].name);
+ modules[i].loaded = true;
+ }
+
+ kmod_module_unref(mod);
+ }
+
+error:
+ if (ctx) {
+ kmod_unref(ctx);
+ }
+ return ret;
+}
+
+/**
+ * @brief Recursively unload modules.
+ *
+ * This function implements the same modules unloading behavior as
+ * 'modprobe -r' or rmmod, it will recursevily go trought the \p module
+ * dependencies and unload modules with a refcount of 0.
+ *
+ * @param mod The module to unload
+ *
+ * @returns \c 0 on success
+ * \c < 0 on error
+ */
+static int rmmod_recurse(struct kmod_module *mod) {
+ int ret = 0;
+ struct kmod_list *deps, *itr;
+
+ if (kmod_module_get_initstate(mod) == KMOD_MODULE_BUILTIN) {
+ DBG("Module %s is builtin", kmod_module_get_name(mod));
+ return ret;
+ }
+
+ ret = kmod_module_remove_module(mod, 0);
+
+ deps = kmod_module_get_dependencies(mod);
+ if (deps != NULL) {
+ kmod_list_foreach(itr, deps) {
+ struct kmod_module *dep = kmod_module_get_module(itr);
+ if (kmod_module_get_refcnt(dep) == 0) {
+ DBG("Recursive remove module %s",
+ kmod_module_get_name(dep));
+ rmmod_recurse(dep);
+ }
+ kmod_module_unref(dep);
+ }
+ kmod_module_unref_list(deps);
+ }
+
+ return ret;
+}
+
+/**
+ * @brief Unloads the kernel modules in \p modules
+ *
+ * @param modules List of modules to unload
+ * @param entries Number of modules in the list
+ *
+ */
+static void modprobe_remove_lttng(const struct kern_modules_param *modules,
+ int entries)
+{
+ int ret = 0, i;
+ struct kmod_ctx *ctx;
+
+ ret = setup_kmod_ctx(&ctx);
+ if (ret < 0) {
+ goto error;
+ }
+
+ for (i = entries - 1; i >= 0; i--) {
+ struct kmod_module *mod = NULL;
+
+ if (!modules[i].loaded) {
+ continue;
+ }
+
+ ret = kmod_module_new_from_name(ctx, modules[i].name, &mod);
+ if (ret < 0) {
+ PERROR("Failed to create kmod module for %s", modules[i].name);
+ goto error;
+ }
+
+ ret = rmmod_recurse(mod);
+ if (ret == -EEXIST) {
+ DBG("Module %s is not in kernel.", modules[i].name);
+ } else if (modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED && ret < 0) {
+ ERR("Unable to remove module %s", modules[i].name);
+ } else {
+ DBG("Modprobe removal successful %s",
+ modules[i].name);
+ }
+
+ kmod_module_unref(mod);
+ }
+
+error:
+ if (ctx) {
+ kmod_unref(ctx);
+ }
+}
+
+#else /* HAVE_KMOD */
+
+static int modprobe_lttng(struct kern_modules_param *modules,
+ int entries)
+{
+ int ret = 0, i;
+ char modprobe[256];
+
+ for (i = 0; i < entries; i++) {
+ ret = snprintf(modprobe, sizeof(modprobe),
+ "/sbin/modprobe %s%s",
+ modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED ? "" : "-q ",
+ modules[i].name);
+ if (ret < 0) {
+ PERROR("snprintf modprobe");
+ goto error;
+ }
+ modprobe[sizeof(modprobe) - 1] = '\0';
+ ret = system(modprobe);
+ if (ret == -1) {
+ if (modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED) {
+ ERR("Unable to launch modprobe for required module %s",
+ modules[i].name);
+ goto error;
+ } else {
+ DBG("Unable to launch modprobe for optional module %s; continuing",
+ modules[i].name);
+ ret = 0;
+ }
+ } else if (WEXITSTATUS(ret) != 0) {
+ if (modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED) {
+ ERR("Unable to load required module %s",
+ modules[i].name);
+ goto error;
+ } else {
+ DBG("Unable to load optional module %s; continuing",
+ modules[i].name);
+ ret = 0;
+ }
+ } else {
+ DBG("Modprobe successfully %s", modules[i].name);
+ modules[i].loaded = true;
+ }
+ }
+
+error:
+ return ret;
+}
+
+static void modprobe_remove_lttng(const struct kern_modules_param *modules,
+ int entries)
+{
+ int ret = 0, i;
+ char modprobe[256];
+
+ for (i = entries - 1; i >= 0; i--) {
+ if (!modules[i].loaded) {
+ continue;
+ }
+ ret = snprintf(modprobe, sizeof(modprobe),
+ "/sbin/modprobe -r -q %s",
+ modules[i].name);
+ if (ret < 0) {
+ PERROR("snprintf modprobe -r");
+ return;
+ }
+ modprobe[sizeof(modprobe) - 1] = '\0';
+ ret = system(modprobe);
+ if (ret == -1) {
+ if (modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED) {
+ ERR("Unable to launch modprobe -r for required module %s",
+ modules[i].name);
+ } else {
+ DBG("Unable to launch modprobe -r for optional module %s",
+ modules[i].name);
+ }
+ } else if (WEXITSTATUS(ret) != 0) {
+ if (modules[i].load_policy == KERNEL_MODULE_PROPERTY_LOAD_POLICY_REQUIRED) {
+ ERR("Unable to remove required module %s",
+ modules[i].name);
+ } else {
+ DBG("Unable to remove optional module %s",
+ modules[i].name);
+ }
+ } else {
+ DBG("Modprobe removal successful %s", modules[i].name);
+ }
+ }
+}
+
+#endif /* HAVE_KMOD */
+
+/*
+ * Remove control kernel module(s) in reverse load order.
+ */
+void modprobe_remove_lttng_control(void)
+{
+ modprobe_remove_lttng(kern_modules_control_core,
+ ARRAY_SIZE(kern_modules_control_core));
+}
+
+static void free_probes(void)
+{
+ int i;
+
+ if (!probes) {
+ return;
+ }
+ for (i = 0; i < nr_probes; ++i) {
+ free(probes[i].name);
+ }
+ free(probes);
+ probes = NULL;
+ nr_probes = 0;
+}
+
+/*
+ * Remove data kernel modules in reverse load order.
+ */
+void modprobe_remove_lttng_data(void)
+{
+ if (!probes) {
+ return;
+ }
+
+ modprobe_remove_lttng(probes, nr_probes);
+ free_probes();
+}
+
+/*
+ * Remove all kernel modules in reverse order.
+ */
+void modprobe_remove_lttng_all(void)
+{
+ modprobe_remove_lttng_data();
+ modprobe_remove_lttng_control();
+}
+
+/*
+ * Load control kernel module(s).
+ */
+int modprobe_lttng_control(void)
+{
+ return modprobe_lttng(kern_modules_control_core,
+ ARRAY_SIZE(kern_modules_control_core));
+}
+
+/**
+ * Grow global list of probes (double capacity or set it to 1 if
+ * currently 0 and copy existing data).
+ */
+static int grow_probes(void)
+{
+ int i;
+ struct kern_modules_param *tmp_probes;
+
+ /* Initialize capacity to 1 if 0. */
+ if (probes_capacity == 0) {
+ probes = (kern_modules_param *) zmalloc(sizeof(*probes));
+ if (!probes) {
+ PERROR("malloc probe list");
+ return -ENOMEM;
+ }
+
+ probes_capacity = 1;
+ return 0;
+ }
+
+ /* Double size. */
+ probes_capacity *= 2;
+
+ tmp_probes = (kern_modules_param *) zmalloc(sizeof(*tmp_probes) * probes_capacity);
+ if (!tmp_probes) {
+ PERROR("malloc probe list");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < nr_probes; ++i) {
+ /* Ownership of 'name' field is transferred. */
+ tmp_probes[i] = probes[i];
+ }
+
+ /* Replace probes with larger copy. */
+ free(probes);
+ probes = tmp_probes;
+
+ return 0;
+}
+
+/*
+ * Appends a comma-separated list of probes to the global list
+ * of probes.
+ */
+static int append_list_to_probes(const char *list)
+{
+ char *next;
+ int ret;
+ char *tmp_list, *cur_list, *saveptr;
+
+ LTTNG_ASSERT(list);
+
+ cur_list = tmp_list = strdup(list);
+ if (!tmp_list) {
+ PERROR("strdup temp list");
+ return -ENOMEM;
+ }
+
+ for (;;) {
+ size_t name_len;
+ struct kern_modules_param *cur_mod;
+
+ next = strtok_r(cur_list, ",", &saveptr);
+ if (!next) {
+ break;
+ }
+ cur_list = NULL;
+
+ /* filter leading spaces */
+ while (*next == ' ') {
+ next++;
+ }
+
+ if (probes_capacity <= nr_probes) {
+ ret = grow_probes();
+ if (ret) {
+ goto error;
+ }
+ }
+
+ /* Length 13 is "lttng-probe-" + \0 */
+ name_len = strlen(next) + 13;
+
+ cur_mod = &probes[nr_probes];
+ cur_mod->name = (char *) zmalloc(name_len);
+ if (!cur_mod->name) {
+ PERROR("malloc probe list");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ ret = snprintf(cur_mod->name, name_len, "lttng-probe-%s", next);
+ if (ret < 0) {
+ PERROR("snprintf modprobe name");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ cur_mod->load_policy = KERNEL_MODULE_PROPERTY_LOAD_POLICY_OPTIONAL;
+
+ nr_probes++;
+ }
+
+ free(tmp_list);
+ return 0;
+
+error:
+ free(tmp_list);
+ free_probes();
+ return ret;
+}
+
+/*
+ * Load data kernel module(s).
+ */
+int modprobe_lttng_data(void)
+{
+ int ret, i;
+ char *list;
+
+ /*
+ * Base probes: either from command line option, environment
+ * variable or default list.
+ */
+ list = the_config.kmod_probes_list.value;
+ if (list) {
+ /* User-specified probes. */
+ ret = append_list_to_probes(list);
+ if (ret) {
+ return ret;
+ }
+ } else {
+ /* Default probes. */
+ int def_len = ARRAY_SIZE(kern_modules_probes_default);
+
+ probes = (kern_modules_param *) zmalloc(sizeof(*probes) * def_len);
+ if (!probes) {
+ PERROR("malloc probe list");
+ return -ENOMEM;
+ }
+
+ nr_probes = probes_capacity = def_len;
+
+ for (i = 0; i < def_len; ++i) {
+ char* name = strdup(kern_modules_probes_default[i].name);
+
+ if (!name) {
+ PERROR("strdup probe item");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ probes[i].name = name;
+ probes[i].load_policy = kern_modules_probes_default[i].load_policy;
+ }
+ }
+
+ /*
+ * Extra modules? Append them to current probes list.
+ */
+ list = the_config.kmod_extra_probes_list.value;
+ if (list) {
+ ret = append_list_to_probes(list);
+ if (ret) {
+ goto error;
+ }
+ }
+
+ /*
+ * Load probes modules now.
+ */
+ ret = modprobe_lttng(probes, nr_probes);
+ if (ret) {
+ goto error;
+ }
+ return ret;
+
+error:
+ free_probes();
+ return ret;
+}
projects / lttng-tools.git / blobdiff