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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/dcookies.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/dcookies.h')
-rw-r--r--include/linux/dcookies.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/dcookies.h b/include/linux/dcookies.h
new file mode 100644
index 00000000..5ac3bdd5
--- /dev/null
+++ b/include/linux/dcookies.h
@@ -0,0 +1,68 @@
+/*
+ * dcookies.h
+ *
+ * Persistent cookie-path mappings
+ *
+ * Copyright 2002 John Levon <levon@movementarian.org>
+ */
+
+#ifndef DCOOKIES_H
+#define DCOOKIES_H
+
+
+#ifdef CONFIG_PROFILING
+
+#include <linux/dcache.h>
+#include <linux/types.h>
+
+struct dcookie_user;
+struct path;
+
+/**
+ * dcookie_register - register a user of dcookies
+ *
+ * Register as a dcookie user. Returns %NULL on failure.
+ */
+struct dcookie_user * dcookie_register(void);
+
+/**
+ * dcookie_unregister - unregister a user of dcookies
+ *
+ * Unregister as a dcookie user. This may invalidate
+ * any dcookie values returned from get_dcookie().
+ */
+void dcookie_unregister(struct dcookie_user * user);
+
+/**
+ * get_dcookie - acquire a dcookie
+ *
+ * Convert the given dentry/vfsmount pair into
+ * a cookie value.
+ *
+ * Returns -EINVAL if no living task has registered as a
+ * dcookie user.
+ *
+ * Returns 0 on success, with *cookie filled in
+ */
+int get_dcookie(struct path *path, unsigned long *cookie);
+
+#else
+
+static inline struct dcookie_user * dcookie_register(void)
+{
+ return NULL;
+}
+
+static inline void dcookie_unregister(struct dcookie_user * user)
+{
+ return;
+}
+
+static inline int get_dcookie(struct path *path, unsigned long *cookie)
+{
+ return -ENOSYS;
+}
+
+#endif /* CONFIG_PROFILING */
+
+#endif /* DCOOKIES_H */