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/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/fsnotify_backend.h>
#include <linux/path.h>
#include <linux/slab.h>
extern struct kmem_cache *fanotify_mark_cache;
extern struct kmem_cache *fanotify_event_cachep;
extern struct kmem_cache *fanotify_perm_event_cachep;
/*
* Structure for normal fanotify events. It gets allocated in
* fanotify_handle_event() and freed when the information is retrieved by
* userspace
*/
struct fanotify_event_info {
struct fsnotify_event fse;
/*
* We hold ref to this path so it may be dereferenced at any point
* during this object's lifetime
*/
struct path path;
struct pid *tgid;
};
/*
* Structure for permission fanotify events. It gets allocated and freed in
* fanotify_handle_event() since we wait there for user response. When the
* information is retrieved by userspace the structure is moved from
* group->notification_list to group->fanotify_data.access_list to wait for
* user response.
*/
struct fanotify_perm_event_info {
struct fanotify_event_info fae;
int response; /* userspace answer to question */
int fd; /* fd we passed to userspace for this event */
};
static inline struct fanotify_perm_event_info *
FANOTIFY_PE(struct fsnotify_event *fse)
{
return container_of(fse, struct fanotify_perm_event_info, fae.fse);
}
static inline bool fanotify_is_perm_event(u32 mask)
{
return IS_ENABLED(CONFIG_FANOTIFY_ACCESS_PERMISSIONS) &&
mask & FAN_ALL_PERM_EVENTS;
}
static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
{
return container_of(fse, struct fanotify_event_info, fse);
}
struct fanotify_event_info *fanotify_alloc_event(struct fsnotify_group *group,
struct inode *inode, u32 mask,
const struct path *path);
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