9p: Make sure we are able to clunk the cached fid on umount

[safe/jmp/linux-2.6] / include / linux / kprobes.h

diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 1071cfd..e7d1b2e 100644 (file)
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -48,13 +48,13 @@
 #define KPROBE_HIT_SSDONE      0x00000008
 
 /* Attach to insert probes on any functions which should be ignored*/
-#define __kprobes      __attribute__((__section__(".kprobes.text"))) notrace
+#define __kprobes      __attribute__((__section__(".kprobes.text")))
 #else /* CONFIG_KPROBES */
 typedef int kprobe_opcode_t;
 struct arch_specific_insn {
        int dummy;
 };
-#define __kprobes      notrace
+#define __kprobes
 #endif /* CONFIG_KPROBES */
 
 struct kprobe;
@@ -122,6 +122,11 @@ struct kprobe {
 /* Kprobe status flags */
 #define KPROBE_FLAG_GONE       1 /* breakpoint has already gone */
 #define KPROBE_FLAG_DISABLED   2 /* probe is temporarily disabled */
+#define KPROBE_FLAG_OPTIMIZED  4 /*
+                                  * probe is really optimized.
+                                  * NOTE:
+                                  * this flag is only for optimized_kprobe.
+                                  */
 
 /* Has this kprobe gone ? */
 static inline int kprobe_gone(struct kprobe *p)
@@ -134,6 +139,12 @@ static inline int kprobe_disabled(struct kprobe *p)
 {
        return p->flags & (KPROBE_FLAG_DISABLED | KPROBE_FLAG_GONE);
 }
+
+/* Is this kprobe really running optimized path ? */
+static inline int kprobe_optimized(struct kprobe *p)
+{
+       return p->flags & KPROBE_FLAG_OPTIMIZED;
+}
 /*
  * Special probe type that uses setjmp-longjmp type tricks to resume
  * execution at a specified entry with a matching prototype corresponding
@@ -249,6 +260,39 @@ extern kprobe_opcode_t *get_insn_slot(void);
 extern void free_insn_slot(kprobe_opcode_t *slot, int dirty);
 extern void kprobes_inc_nmissed_count(struct kprobe *p);
 
+#ifdef CONFIG_OPTPROBES
+/*
+ * Internal structure for direct jump optimized probe
+ */
+struct optimized_kprobe {
+       struct kprobe kp;
+       struct list_head list;  /* list for optimizing queue */
+       struct arch_optimized_insn optinsn;
+};
+
+/* Architecture dependent functions for direct jump optimization */
+extern int arch_prepared_optinsn(struct arch_optimized_insn *optinsn);
+extern int arch_check_optimized_kprobe(struct optimized_kprobe *op);
+extern int arch_prepare_optimized_kprobe(struct optimized_kprobe *op);
+extern void arch_remove_optimized_kprobe(struct optimized_kprobe *op);
+extern int  arch_optimize_kprobe(struct optimized_kprobe *op);
+extern void arch_unoptimize_kprobe(struct optimized_kprobe *op);
+extern kprobe_opcode_t *get_optinsn_slot(void);
+extern void free_optinsn_slot(kprobe_opcode_t *slot, int dirty);
+extern int arch_within_optimized_kprobe(struct optimized_kprobe *op,
+                                       unsigned long addr);
+
+extern void opt_pre_handler(struct kprobe *p, struct pt_regs *regs);
+
+#ifdef CONFIG_SYSCTL
+extern int sysctl_kprobes_optimization;
+extern int proc_kprobes_optimization_handler(struct ctl_table *table,
+                                            int write, void __user *buffer,
+                                            size_t *length, loff_t *ppos);
+#endif
+
+#endif /* CONFIG_OPTPROBES */
+
 /* Get the kprobe at this addr (if any) - called with preemption disabled */
 struct kprobe *get_kprobe(void *addr);
 void kretprobe_hash_lock(struct task_struct *tsk,
@@ -296,6 +340,8 @@ void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
 int disable_kprobe(struct kprobe *kp);
 int enable_kprobe(struct kprobe *kp);
 
+void dump_kprobe(struct kprobe *kp);
+
 #else /* !CONFIG_KPROBES: */
 
 static inline int kprobes_built_in(void)
@@ -371,4 +417,21 @@ static inline int enable_kprobe(struct kprobe *kp)
        return -ENOSYS;
 }
 #endif /* CONFIG_KPROBES */
+static inline int disable_kretprobe(struct kretprobe *rp)
+{
+       return disable_kprobe(&rp->kp);
+}
+static inline int enable_kretprobe(struct kretprobe *rp)
+{
+       return enable_kprobe(&rp->kp);
+}
+static inline int disable_jprobe(struct jprobe *jp)
+{
+       return disable_kprobe(&jp->kp);
+}
+static inline int enable_jprobe(struct jprobe *jp)
+{
+       return enable_kprobe(&jp->kp);
+}
+
 #endif /* _LINUX_KPROBES_H */