diff options
Diffstat (limited to 'fs/notify/fanotify/fanotify.h')
| -rw-r--r-- | fs/notify/fanotify/fanotify.h | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h index 32a2f034fb9..2a5fb14115d 100644 --- a/fs/notify/fanotify/fanotify.h +++ b/fs/notify/fanotify/fanotify.h @@ -3,13 +3,12 @@ #include <linux/slab.h> extern struct kmem_cache *fanotify_event_cachep; +extern struct kmem_cache *fanotify_perm_event_cachep; /* - * Lifetime of the structure differs for normal and permission events. In both - * cases the structure is allocated in fanotify_handle_event(). For normal - * events the structure is freed immediately after reporting it to userspace. - * For permission events we free it only after we receive response from - * userspace. + * 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; @@ -19,12 +18,33 @@ struct fanotify_event_info { */ struct path path; struct pid *tgid; +}; + #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS - u32 response; /* userspace answer to question */ -#endif +/* + * 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); +} +#endif + 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 inode *inode, u32 mask, + struct path *path); |