Expose lttng-modules ABI version ioctl

[lttng-modules.git] / lttng-abi.c

diff --git a/lttng-abi.c b/lttng-abi.c
index 41e5e450b61babc1cda9d18a3b0594c417df1b66..b83ed3d211defb747447469fc40bba06d816242b 100644 (file)
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -188,6 +188,13 @@ void lttng_abi_tracer_version(struct lttng_kernel_tracer_version *v)
        v->patchlevel = LTTNG_MODULES_PATCHLEVEL_VERSION;
 }
 
+static
+void lttng_abi_tracer_abi_version(struct lttng_kernel_tracer_abi_version *v)
+{
+       v->major = LTTNG_MODULES_ABI_MAJOR_VERSION;
+       v->minor = LTTNG_MODULES_ABI_MINOR_VERSION;
+}
+
 static
 long lttng_abi_add_context(struct file *file,
        struct lttng_kernel_context *context_param,
@@ -245,6 +252,8 @@ long lttng_abi_add_context(struct file *file,
  *             Returns a file descriptor listing available tracepoints
  *     LTTNG_KERNEL_WAIT_QUIESCENT
  *             Returns after all previously running probes have completed
+ *     LTTNG_KERNEL_TRACER_ABI_VERSION
+ *             Returns the LTTng kernel tracer ABI version
  *
  * The returned session will be deleted when its file descriptor is closed.
  */
@@ -278,7 +287,19 @@ long lttng_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                        (struct lttng_kernel_tracer_version __user *) arg;
 
                lttng_abi_tracer_version(&version);
-               
+
+               if (copy_to_user(uversion, &version, sizeof(version)))
+                       return -EFAULT;
+               return 0;
+       }
+       case LTTNG_KERNEL_TRACER_ABI_VERSION:
+       {
+               struct lttng_kernel_tracer_abi_version version;
+               struct lttng_kernel_tracer_abi_version *uversion =
+                       (struct lttng_kernel_tracer_abi_version __user *) arg;
+
+               lttng_abi_tracer_abi_version(&version);
+
                if (copy_to_user(uversion, &version, sizeof(version)))
                        return -EFAULT;
                return 0;
@@ -1170,6 +1191,9 @@ old_ctx_end:
        case LTTNG_KERNEL_OLD_DISABLE:
        case LTTNG_KERNEL_DISABLE:
                return lttng_channel_disable(channel);
+       case LTTNG_KERNEL_SYSCALL_MASK:
+               return lttng_channel_syscall_mask(channel,
+                       (struct lttng_kernel_syscall_mask __user *) arg);
        default:
                return -ENOIOCTLCMD;
        }