-int cfs_trace_copyin_string(char *knl_buffer, int knl_buffer_nob,
- const char __user *usr_buffer, int usr_buffer_nob)
-{
- int nob;
-
- if (usr_buffer_nob > knl_buffer_nob)
- return -EOVERFLOW;
-
- if (copy_from_user(knl_buffer, usr_buffer, usr_buffer_nob))
- return -EFAULT;
-
- nob = strnlen(knl_buffer, usr_buffer_nob);
- while (--nob >= 0) /* strip trailing whitespace */
- if (!isspace(knl_buffer[nob]))
- break;
-
- if (nob < 0) /* empty string */
- return -EINVAL;
-
- if (nob == knl_buffer_nob) /* no space to terminate */
- return -EOVERFLOW;
-
- knl_buffer[nob + 1] = 0; /* terminate */
- return 0;
-}
-EXPORT_SYMBOL(cfs_trace_copyin_string);
-