LXR linux/fs/notify/fanotify/fanotify.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#include <linux/fsnotify_backend.h>
   3#include <linux/path.h>
   4#include <linux/slab.h>
   5
   6extern struct kmem_cache *fanotify_mark_cache;
   7extern struct kmem_cache *fanotify_event_cachep;
   8extern struct kmem_cache *fanotify_perm_event_cachep;
   9
  10/*
  11 * Structure for normal fanotify events. It gets allocated in
  12 * fanotify_handle_event() and freed when the information is retrieved by
  13 * userspace
  14 */
  15struct fanotify_event_info {
  16        struct fsnotify_event fse;
  17        /*
  18         * We hold ref to this path so it may be dereferenced at any point
  19         * during this object's lifetime
  20         */
  21        struct path path;
  22        struct pid *tgid;
  23};
  24
  25#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
  26/*
  27 * Structure for permission fanotify events. It gets allocated and freed in
  28 * fanotify_handle_event() since we wait there for user response. When the
  29 * information is retrieved by userspace the structure is moved from
  30 * group->notification_list to group->fanotify_data.access_list to wait for
  31 * user response.
  32 */
  33struct fanotify_perm_event_info {
  34        struct fanotify_event_info fae;
  35        int response;   /* userspace answer to question */
  36        int fd;         /* fd we passed to userspace for this event */
  37};
  38
  39static inline struct fanotify_perm_event_info *
  40FANOTIFY_PE(struct fsnotify_event *fse)
  41{
  42        return container_of(fse, struct fanotify_perm_event_info, fae.fse);
  43}
  44#endif
  45
  46static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
  47{
  48        return container_of(fse, struct fanotify_event_info, fse);
  49}
  50
  51struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
  52                                                 const struct path *path);
  53