Have #ip's protocol ctl()s throw errors

[akaros.git] / kern / include / kthread.h

diff --git a/kern/include/kthread.h b/kern/include/kthread.h
index a31330f..0b9f4bf 100644 (file)
--- a/kern/include/kthread.h
+++ b/kern/include/kthread.h
@@ -27,6 +27,9 @@ TAILQ_HEAD(semaphore_tailq, semaphore);
 #define GENBUF_SZ 128  /* plan9 uses this as a scratch space, per syscall */
 
 #define KTH_IS_KTASK                   (1 << 0)
+#define KTH_SAVE_ADDR_SPACE            (1 << 1)
+#define KTH_KTASK_FLAGS                        (KTH_IS_KTASK)
+#define KTH_DEFAULT_FLAGS              (KTH_SAVE_ADDR_SPACE)
 
 /* This captures the essence of a kernel context that we want to suspend.  When
  * a kthread is running, we make sure its stacktop is the default kernel stack,
@@ -43,6 +46,7 @@ struct kthread {
        char                                            *name;
        char                                            generic_buf[GENBUF_SZ];
        struct systrace_record          *trace;
+       struct systrace_record          *strace;
 };
 
 /* Semaphore for kthreads to sleep on.  0 or less means you need to sleep */
@@ -150,6 +154,9 @@ void __reg_abortable_cv(struct cv_lookup_elm *cle, struct cond_var *cv);
 void dereg_abortable_cv(struct cv_lookup_elm *cle);
 bool should_abort(struct cv_lookup_elm *cle);
 
+uintptr_t switch_to_ktask(void);
+void switch_back_from_ktask(uintptr_t old_ret);
+
 /* qlocks are plan9's binary sempahore, which are wrappers around our sems.
  * Not sure if they'll need irqsave or normal sems. */
 typedef struct semaphore qlock_t;