#include <common/kernel-ctl/kernel-ctl.h>
#include <common/kernel-ctl/kernel-ioctl.h>
#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/tracker.h>
+#include <common/utils.h>
+#include <lttng/event.h>
+#include <lttng/lttng-error.h>
+#include <lttng/tracker.h>
#include "lttng-sessiond.h"
#include "lttng-syscall.h"
#include "utils.h"
#include "rotate.h"
#include "modprobe.h"
+#include "tracker.h"
/*
* Key used to reference a channel between the sessiond and the consumer. This
return ret;
}
-static struct lttng_tracker_list *get_id_tracker_list(
+static
+struct process_attr_tracker *_kernel_get_process_attr_tracker(
struct ltt_kernel_session *session,
- enum lttng_tracker_type tracker_type)
+ enum lttng_process_attr process_attr)
{
- switch (tracker_type) {
- case LTTNG_TRACKER_PID:
- return session->tracker_list_pid;
- case LTTNG_TRACKER_VPID:
- return session->tracker_list_vpid;
- case LTTNG_TRACKER_UID:
- return session->tracker_list_uid;
- case LTTNG_TRACKER_VUID:
- return session->tracker_list_vuid;
- case LTTNG_TRACKER_GID:
- return session->tracker_list_gid;
- case LTTNG_TRACKER_VGID:
- return session->tracker_list_vgid;
+ switch (process_attr) {
+ case LTTNG_PROCESS_ATTR_PROCESS_ID:
+ return session->tracker_pid;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
+ return session->tracker_vpid;
+ case LTTNG_PROCESS_ATTR_USER_ID:
+ return session->tracker_uid;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ return session->tracker_vuid;
+ case LTTNG_PROCESS_ATTR_GROUP_ID:
+ return session->tracker_gid;
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ return session->tracker_vgid;
default:
return NULL;
}
}
-int kernel_track_id(enum lttng_tracker_type tracker_type,
+const struct process_attr_tracker *kernel_get_process_attr_tracker(
struct ltt_kernel_session *session,
- const struct lttng_tracker_id *id)
+ enum lttng_process_attr process_attr)
{
- int ret, value;
- struct lttng_tracker_list *tracker_list;
- struct lttng_tracker_ids *saved_ids;
+ return (const struct process_attr_tracker *)
+ _kernel_get_process_attr_tracker(session, process_attr);
+}
- ret = lttng_tracker_id_lookup_string(tracker_type, id, &value);
- if (ret != LTTNG_OK) {
- return ret;
- }
+enum lttng_error_code kernel_process_attr_tracker_set_tracking_policy(
+ struct ltt_kernel_session *session,
+ enum lttng_process_attr process_attr,
+ enum lttng_tracking_policy policy)
+{
+ int ret;
+ enum lttng_error_code ret_code = LTTNG_OK;
+ struct process_attr_tracker *tracker =
+ _kernel_get_process_attr_tracker(session, process_attr);
+ enum lttng_tracking_policy previous_policy;
- tracker_list = get_id_tracker_list(session, tracker_type);
- if (!tracker_list) {
- return LTTNG_ERR_INVALID;
+ if (!tracker) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
}
- /* Save list for restore on error. */
- ret = lttng_tracker_id_get_list(tracker_list, &saved_ids);
- if (ret != LTTNG_OK) {
- return LTTNG_ERR_INVALID;
+ previous_policy = process_attr_tracker_get_tracking_policy(tracker);
+ ret = process_attr_tracker_set_tracking_policy(tracker, policy);
+ if (ret) {
+ ret_code = LTTNG_ERR_UNK;
+ goto end;
}
- /* Add to list. */
- ret = lttng_tracker_list_add(tracker_list, id);
- if (ret != LTTNG_OK) {
+ if (previous_policy == policy) {
goto end;
}
- switch (tracker_type) {
- case LTTNG_TRACKER_PID:
- DBG("Kernel track PID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_track_pid(session->fd, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_VPID:
- DBG("Kernel track VPID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_track_id(session->fd, LTTNG_TRACKER_VPID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_UID:
- DBG("Kernel track UID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_track_id(session->fd, LTTNG_TRACKER_UID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_GID:
- DBG("Kernel track GID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_track_id(session->fd, LTTNG_TRACKER_GID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_VUID:
- DBG("Kernel track VUID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_track_id(session->fd, LTTNG_TRACKER_VUID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
+ switch (policy) {
+ case LTTNG_TRACKING_POLICY_INCLUDE_ALL:
+ if (process_attr == LTTNG_PROCESS_ATTR_PROCESS_ID) {
+ /*
+ * Maintain a special case for the process ID process
+ * attribute tracker as it was the only supported
+ * attribute prior to 2.12.
+ */
+ ret = kernctl_track_pid(session->fd, -1);
+ } else {
+ ret = kernctl_track_id(session->fd, process_attr, -1);
}
break;
- case LTTNG_TRACKER_VGID:
- DBG("Kernel track VGID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_track_id(session->fd, LTTNG_TRACKER_VGID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
+ case LTTNG_TRACKING_POLICY_EXCLUDE_ALL:
+ case LTTNG_TRACKING_POLICY_INCLUDE_SET:
+ /* fall-through. */
+ if (process_attr == LTTNG_PROCESS_ATTR_PROCESS_ID) {
+ /*
+ * Maintain a special case for the process ID process
+ * attribute tracker as it was the only supported
+ * attribute prior to 2.12.
+ */
+ ret = kernctl_untrack_pid(session->fd, -1);
+ } else {
+ ret = kernctl_untrack_id(session->fd, process_attr, -1);
}
break;
default:
- ret = -EINVAL;
- break;
+ abort();
}
-
- /* Error handling. */
+ /* kern-ctl error handling */
switch (-ret) {
+ case 0:
+ ret_code = LTTNG_OK;
+ break;
case EINVAL:
- ret = LTTNG_ERR_INVALID;
+ ret_code = LTTNG_ERR_INVALID;
break;
case ENOMEM:
- ret = LTTNG_ERR_NOMEM;
+ ret_code = LTTNG_ERR_NOMEM;
break;
case EEXIST:
- ret = LTTNG_ERR_ID_TRACKED;
+ ret_code = LTTNG_ERR_PROCESS_ATTR_EXISTS;
break;
default:
- ret = LTTNG_ERR_UNK;
+ ret_code = LTTNG_ERR_UNK;
break;
}
-
- if (lttng_tracker_id_set_list(tracker_list, saved_ids) != LTTNG_OK) {
- ERR("Error on tracker add error handling.\n");
- }
end:
- lttng_tracker_ids_destroy(saved_ids);
- return ret;
+ return ret_code;
}
-int kernel_untrack_id(enum lttng_tracker_type tracker_type,
+enum lttng_error_code kernel_process_attr_tracker_inclusion_set_add_value(
struct ltt_kernel_session *session,
- const struct lttng_tracker_id *id)
+ enum lttng_process_attr process_attr,
+ const struct process_attr_value *value)
{
- int ret, value;
- struct lttng_tracker_list *tracker_list;
- struct lttng_tracker_ids *saved_ids;
-
- ret = lttng_tracker_id_lookup_string(tracker_type, id, &value);
- if (ret != LTTNG_OK) {
- return ret;
- }
+ int ret, integral_value;
+ enum lttng_error_code ret_code;
+ struct process_attr_tracker *tracker;
+ enum process_attr_tracker_status status;
- tracker_list = get_id_tracker_list(session, tracker_type);
- if (!tracker_list) {
- return LTTNG_ERR_INVALID;
- }
- /* Save list for restore on error. */
- ret = lttng_tracker_id_get_list(tracker_list, &saved_ids);
- if (ret != LTTNG_OK) {
- return LTTNG_ERR_INVALID;
- }
- /* Remove from list. */
- ret = lttng_tracker_list_remove(tracker_list, id);
- if (ret != LTTNG_OK) {
- goto end;
- }
-
- switch (tracker_type) {
- case LTTNG_TRACKER_PID:
- DBG("Kernel untrack PID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_untrack_pid(session->fd, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_VPID:
- DBG("Kernel untrack VPID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_untrack_id(
- session->fd, LTTNG_TRACKER_VPID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_UID:
- DBG("Kernel untrack UID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_untrack_id(session->fd, LTTNG_TRACKER_UID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
- break;
- case LTTNG_TRACKER_GID:
- DBG("Kernel untrack GID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_untrack_id(session->fd, LTTNG_TRACKER_GID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
- }
+ /*
+ * Convert process attribute tracker value to the integral
+ * representation required by the kern-ctl API.
+ */
+ switch (process_attr) {
+ case LTTNG_PROCESS_ATTR_PROCESS_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
+ integral_value = (int) value->value.pid;
break;
- case LTTNG_TRACKER_VUID:
- DBG("Kernel untrack VUID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_untrack_id(
- session->fd, LTTNG_TRACKER_VUID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
+ case LTTNG_PROCESS_ATTR_USER_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME) {
+ uid_t uid;
+
+ ret_code = utils_user_id_from_name(
+ value->value.user_name, &uid);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+ integral_value = (int) uid;
+ } else {
+ integral_value = (int) value->value.uid;
}
break;
- case LTTNG_TRACKER_VGID:
- DBG("Kernel untrack VGID %d for session id %" PRIu64 ".", value,
- session->id);
- ret = kernctl_untrack_id(
- session->fd, LTTNG_TRACKER_VGID, value);
- if (!ret) {
- ret = LTTNG_OK;
- goto end;
+ case LTTNG_PROCESS_ATTR_GROUP_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME) {
+ gid_t gid;
+
+ ret_code = utils_group_id_from_name(
+ value->value.group_name, &gid);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+ integral_value = (int) gid;
+ } else {
+ integral_value = (int) value->value.gid;
}
break;
default:
- ret = -EINVAL;
- break;
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ tracker = _kernel_get_process_attr_tracker(session, process_attr);
+ if (!tracker) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ status = process_attr_tracker_inclusion_set_add_value(tracker, value);
+ if (status != PROCESS_ATTR_TRACKER_STATUS_OK) {
+ switch (status) {
+ case PROCESS_ATTR_TRACKER_STATUS_EXISTS:
+ ret_code = LTTNG_ERR_PROCESS_ATTR_EXISTS;
+ break;
+ case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY:
+ ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY;
+ break;
+ case PROCESS_ATTR_TRACKER_STATUS_ERROR:
+ default:
+ ret_code = LTTNG_ERR_UNK;
+ break;
+ }
+ goto end;
+ }
+
+ DBG("Kernel track %s %d for session id %" PRIu64,
+ lttng_process_attr_to_string(process_attr),
+ integral_value, session->id);
+ if (process_attr == LTTNG_PROCESS_ATTR_PROCESS_ID) {
+ /*
+ * Maintain a special case for the process ID process attribute
+ * tracker as it was the only supported attribute prior to 2.12.
+ */
+ ret = kernctl_track_pid(session->fd, integral_value);
+ } else {
+ ret = kernctl_track_id(
+ session->fd, process_attr, integral_value);
+ }
+ if (ret == 0) {
+ ret_code = LTTNG_OK;
+ goto end;
}
- /* Error handling. */
+ kernel_wait_quiescent();
+
+ /* kern-ctl error handling */
switch (-ret) {
+ case 0:
+ ret_code = LTTNG_OK;
+ break;
case EINVAL:
- ret = LTTNG_ERR_INVALID;
+ ret_code = LTTNG_ERR_INVALID;
break;
case ENOMEM:
- ret = LTTNG_ERR_NOMEM;
+ ret_code = LTTNG_ERR_NOMEM;
break;
case EEXIST:
- ret = LTTNG_ERR_ID_TRACKED;
+ ret_code = LTTNG_ERR_PROCESS_ATTR_EXISTS;
break;
default:
- ret = LTTNG_ERR_UNK;
+ ret_code = LTTNG_ERR_UNK;
break;
}
- if (lttng_tracker_id_set_list(tracker_list, saved_ids) != LTTNG_OK) {
- ERR("Error on tracker remove error handling.\n");
+ /* Attempt to remove the value from the tracker. */
+ status = process_attr_tracker_inclusion_set_remove_value(
+ tracker, value);
+ if (status != PROCESS_ATTR_TRACKER_STATUS_OK) {
+ ERR("Failed to roll-back the tracking of kernel %s process attribute %d while handling a kern-ctl error",
+ lttng_process_attr_to_string(process_attr),
+ integral_value);
}
end:
- lttng_tracker_ids_destroy(saved_ids);
- return ret;
+ return ret_code;
}
-/*
- * Called with session lock held.
- */
-int kernel_list_tracker_ids(enum lttng_tracker_type tracker_type,
+enum lttng_error_code kernel_process_attr_tracker_inclusion_set_remove_value(
struct ltt_kernel_session *session,
- struct lttng_tracker_ids **_ids)
+ enum lttng_process_attr process_attr,
+ const struct process_attr_value *value)
{
- int ret = 0;
- struct lttng_tracker_list *tracker_list;
+ int ret, integral_value;
+ enum lttng_error_code ret_code;
+ struct process_attr_tracker *tracker;
+ enum process_attr_tracker_status status;
+
+ /*
+ * Convert process attribute tracker value to the integral
+ * representation required by the kern-ctl API.
+ */
+ switch (process_attr) {
+ case LTTNG_PROCESS_ATTR_PROCESS_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
+ integral_value = (int) value->value.pid;
+ break;
+ case LTTNG_PROCESS_ATTR_USER_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
+ if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME) {
+ uid_t uid;
+
+ ret_code = utils_user_id_from_name(
+ value->value.user_name, &uid);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+ integral_value = (int) uid;
+ } else {
+ integral_value = (int) value->value.uid;
+ }
+ break;
+ case LTTNG_PROCESS_ATTR_GROUP_ID:
+ case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
+ if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME) {
+ gid_t gid;
+
+ ret_code = utils_group_id_from_name(
+ value->value.group_name, &gid);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+ integral_value = (int) gid;
+ } else {
+ integral_value = (int) value->value.gid;
+ }
+ break;
+ default:
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
- tracker_list = get_id_tracker_list(session, tracker_type);
- if (!tracker_list) {
- ret = -LTTNG_ERR_INVALID;
+ tracker = _kernel_get_process_attr_tracker(session, process_attr);
+ if (!tracker) {
+ ret_code = LTTNG_ERR_INVALID;
goto end;
}
- ret = lttng_tracker_id_get_list(tracker_list, _ids);
- if (ret != LTTNG_OK) {
- ret = -LTTNG_ERR_INVALID;
+ status = process_attr_tracker_inclusion_set_remove_value(
+ tracker, value);
+ if (status != PROCESS_ATTR_TRACKER_STATUS_OK) {
+ switch (status) {
+ case PROCESS_ATTR_TRACKER_STATUS_MISSING:
+ ret_code = LTTNG_ERR_PROCESS_ATTR_MISSING;
+ break;
+ case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY:
+ ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY;
+ break;
+ case PROCESS_ATTR_TRACKER_STATUS_ERROR:
+ default:
+ ret_code = LTTNG_ERR_UNK;
+ break;
+ }
+ goto end;
+ }
+
+ DBG("Kernel track %s %d for session id %" PRIu64,
+ lttng_process_attr_to_string(process_attr),
+ integral_value, session->id);
+ if (process_attr == LTTNG_PROCESS_ATTR_PROCESS_ID) {
+ /*
+ * Maintain a special case for the process ID process attribute
+ * tracker as it was the only supported attribute prior to 2.12.
+ */
+ ret = kernctl_untrack_pid(session->fd, integral_value);
+ } else {
+ ret = kernctl_untrack_id(
+ session->fd, process_attr, integral_value);
+ }
+ if (ret == 0) {
+ ret_code = LTTNG_OK;
goto end;
}
+ kernel_wait_quiescent();
+ /* kern-ctl error handling */
+ switch (-ret) {
+ case 0:
+ ret_code = LTTNG_OK;
+ break;
+ case EINVAL:
+ ret_code = LTTNG_ERR_INVALID;
+ break;
+ case ENOMEM:
+ ret_code = LTTNG_ERR_NOMEM;
+ break;
+ case ENOENT:
+ ret_code = LTTNG_ERR_PROCESS_ATTR_MISSING;
+ break;
+ default:
+ ret_code = LTTNG_ERR_UNK;
+ break;
+ }
+
+ /* Attempt to add the value to the tracker. */
+ status = process_attr_tracker_inclusion_set_add_value(
+ tracker, value);
+ if (status != PROCESS_ATTR_TRACKER_STATUS_OK) {
+ ERR("Failed to roll-back the tracking of kernel %s process attribute %d while handling a kern-ctl error",
+ lttng_process_attr_to_string(process_attr),
+ integral_value);
+ }
end:
- return ret;
+ return ret_code;
}
/*
ksess->uid, ksess->gid, ksess->consumer,
/* is_metadata_channel */ false);
if (ret < 0) {
- status = LTTNG_ERR_KERN_CONSUMER_FAIL;
+ status = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
}
ksess->uid, ksess->gid, ksess->consumer,
/* is_metadata_channel */ true);
if (ret < 0) {
- status = LTTNG_ERR_KERN_CONSUMER_FAIL;
+ status = LTTNG_ERR_ROTATION_FAIL_CONSUMER;
goto error;
}
}
projects / lttng-tools.git / blobdiff