#ifndef _LINUX_FANOTIFY_H #define _LINUX_FANOTIFY_H #include <linux/types.h> /* the following events that user-space can register for */ #define FAN_ACCESS 0x00000001 /* File was accessed */ #define FAN_MODIFY 0x00000002 /* File was modified */ #define FAN_CLOSE_WRITE 0x00000008 /* Unwrittable file closed */ #define FAN_CLOSE_NOWRITE 0x00000010 /* Writtable file closed */ #define FAN_OPEN 0x00000020 /* File was opened */ #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */ /* FIXME currently Q's have no limit.... */ #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */ #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */ /* helper events */ #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */ /* flags used for fanotify_init() */ #define FAN_CLOEXEC 0x00000001 #define FAN_NONBLOCK 0x00000002 #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK) /* flags used for fanotify_modify_mark() */ #define FAN_MARK_ADD 0x00000001 #define FAN_MARK_REMOVE 0x00000002 #define FAN_MARK_DONT_FOLLOW 0x00000004 #define FAN_MARK_ONLYDIR 0x00000008 #define FAN_MARK_MOUNT 0x00000010 #define FAN_MARK_IGNORED_MASK 0x00000020 #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040 #define FAN_MARK_FLUSH 0x00000080 #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\ FAN_MARK_REMOVE |\ FAN_MARK_DONT_FOLLOW |\ FAN_MARK_ONLYDIR |\ FAN_MARK_MOUNT |\ FAN_MARK_IGNORED_MASK |\ FAN_MARK_IGNORED_SURV_MODIFY) /* * All of the events - we build the list by hand so that we can add flags in * the future and not break backward compatibility. Apps will get only the * events that they originally wanted. Be sure to add new events here! */ #define FAN_ALL_EVENTS (FAN_ACCESS |\ FAN_MODIFY |\ FAN_CLOSE |\ FAN_OPEN) /* * All events which require a permission response from userspace */ #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\ FAN_ACCESS_PERM) #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\ FAN_ALL_PERM_EVENTS |\ FAN_Q_OVERFLOW) #define FANOTIFY_METADATA_VERSION 2 struct fanotify_event_metadata { __u32 event_len; __u32 vers; __u64 mask; __s32 fd; __s32 pid; } __attribute__ ((packed)); struct fanotify_response { __s32 fd; __u32 response; } __attribute__ ((packed)); /* Legit userspace responses to a _PERM event */ #define FAN_ALLOW 0x01 #define FAN_DENY 0x02 /* Helper functions to deal with fanotify_event_metadata buffers */ #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata)) #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \ (struct fanotify_event_metadata*)(((char *)(meta)) + \ (meta)->event_len)) #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \ (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \ (long)(meta)->event_len <= (long)(len)) #endif /* _LINUX_FANOTIFY_H */