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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/dcookies.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (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.h | 68 |
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 */ |