a0a92d261f
Common fsnotify_event helpers have no need for the mask field. It is only used by backend code, so move the field out of the abstract fsnotify_event struct and into the concrete backend event structs. This change packs struct inotify_event_info better on 64bit machine and will allow us to cram some more fields into struct fanotify_event_info. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/fsnotify_backend.h>
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#include <linux/path.h>
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#include <linux/slab.h>
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extern struct kmem_cache *fanotify_mark_cache;
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extern struct kmem_cache *fanotify_event_cachep;
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extern struct kmem_cache *fanotify_perm_event_cachep;
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/*
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* Structure for normal fanotify events. It gets allocated in
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* fanotify_handle_event() and freed when the information is retrieved by
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* userspace
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*/
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struct fanotify_event_info {
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struct fsnotify_event fse;
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u32 mask;
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/*
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* We hold ref to this path so it may be dereferenced at any point
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* during this object's lifetime
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*/
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struct path path;
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struct pid *pid;
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};
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/*
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* Structure for permission fanotify events. It gets allocated and freed in
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* fanotify_handle_event() since we wait there for user response. When the
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* information is retrieved by userspace the structure is moved from
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* group->notification_list to group->fanotify_data.access_list to wait for
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* user response.
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*/
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struct fanotify_perm_event_info {
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struct fanotify_event_info fae;
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int response; /* userspace answer to question */
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int fd; /* fd we passed to userspace for this event */
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};
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static inline struct fanotify_perm_event_info *
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FANOTIFY_PE(struct fsnotify_event *fse)
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{
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return container_of(fse, struct fanotify_perm_event_info, fae.fse);
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}
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static inline bool fanotify_is_perm_event(u32 mask)
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{
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return IS_ENABLED(CONFIG_FANOTIFY_ACCESS_PERMISSIONS) &&
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mask & FANOTIFY_PERM_EVENTS;
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}
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static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
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{
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return container_of(fse, struct fanotify_event_info, fse);
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}
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struct fanotify_event_info *fanotify_alloc_event(struct fsnotify_group *group,
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struct inode *inode, u32 mask,
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const struct path *path);
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