Fix: context printk mismatch on error

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

diff --git a/lttng-abi.c b/lttng-abi.c
index ede2ae79bd7b15c45ec4ef3864a048cc85f2e006..d4c5ea0fc8938d1d31b6639357546b24a5d19ffa 100644 (file)
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -144,6 +144,51 @@ fd_error:
        return ret;
 }
 
+#ifndef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+static inline
+int lttng_abi_syscall_list(void)
+{
+       return -ENOSYS;
+}
+#else
+static
+int lttng_abi_syscall_list(void)
+{
+       struct file *syscall_list_file;
+       int file_fd, ret;
+
+       file_fd = lttng_get_unused_fd();
+       if (file_fd < 0) {
+               ret = file_fd;
+               goto fd_error;
+       }
+
+       syscall_list_file = anon_inode_getfile("[lttng_syscall_list]",
+                                         &lttng_syscall_list_fops,
+                                         NULL, O_RDWR);
+       if (IS_ERR(syscall_list_file)) {
+               ret = PTR_ERR(syscall_list_file);
+               goto file_error;
+       }
+       ret = lttng_syscall_list_fops.open(NULL, syscall_list_file);
+       if (ret < 0)
+               goto open_error;
+       fd_install(file_fd, syscall_list_file);
+       if (file_fd < 0) {
+               ret = file_fd;
+               goto fd_error;
+       }
+       return file_fd;
+
+open_error:
+       fput(syscall_list_file);
+file_error:
+       put_unused_fd(file_fd);
+fd_error:
+       return ret;
+}
+#endif
+
 static
 void lttng_abi_tracer_version(struct lttng_kernel_tracer_version *v)
 {
@@ -1323,6 +1368,18 @@ long lttng_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                        WARN_ON_ONCE(1);
                        return -ENOSYS;
                }
+       case LTTNG_KERNEL_FILTER:
+               switch (*evtype) {
+               case LTTNG_TYPE_EVENT:
+                       return -EINVAL;
+               case LTTNG_TYPE_ENABLER:
+               {
+                       enabler = file->private_data;
+                       return lttng_enabler_attach_bytecode(enabler,
+                               (struct lttng_kernel_filter_bytecode __user *) arg);
+               }
+
+               }
        default:
                return -ENOIOCTLCMD;
        }