70 строки
1.8 KiB
C
70 строки
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#include <linux/fsnotify_backend.h>
|
|
#include <linux/inotify.h>
|
|
#include <linux/slab.h> /* struct kmem_cache */
|
|
|
|
struct inotify_event_info {
|
|
struct fsnotify_event fse;
|
|
u32 mask;
|
|
int wd;
|
|
u32 sync_cookie;
|
|
int name_len;
|
|
char name[];
|
|
};
|
|
|
|
struct inotify_inode_mark {
|
|
struct fsnotify_mark fsn_mark;
|
|
int wd;
|
|
};
|
|
|
|
static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse)
|
|
{
|
|
return container_of(fse, struct inotify_event_info, fse);
|
|
}
|
|
|
|
/*
|
|
* INOTIFY_USER_FLAGS represents all of the mask bits that we expose to
|
|
* userspace. There is at least one bit (FS_EVENT_ON_CHILD) which is
|
|
* used only internally to the kernel.
|
|
*/
|
|
#define INOTIFY_USER_MASK (IN_ALL_EVENTS)
|
|
|
|
static inline __u32 inotify_mark_user_mask(struct fsnotify_mark *fsn_mark)
|
|
{
|
|
__u32 mask = fsn_mark->mask & INOTIFY_USER_MASK;
|
|
|
|
if (fsn_mark->flags & FSNOTIFY_MARK_FLAG_EXCL_UNLINK)
|
|
mask |= IN_EXCL_UNLINK;
|
|
if (fsn_mark->flags & FSNOTIFY_MARK_FLAG_IN_ONESHOT)
|
|
mask |= IN_ONESHOT;
|
|
|
|
return mask;
|
|
}
|
|
|
|
extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
|
|
struct fsnotify_group *group);
|
|
extern int inotify_handle_inode_event(struct fsnotify_mark *inode_mark,
|
|
u32 mask, struct inode *inode,
|
|
struct inode *dir,
|
|
const struct qstr *name, u32 cookie);
|
|
|
|
extern const struct fsnotify_ops inotify_fsnotify_ops;
|
|
extern struct kmem_cache *inotify_inode_mark_cachep;
|
|
|
|
#ifdef CONFIG_INOTIFY_USER
|
|
static inline void dec_inotify_instances(struct ucounts *ucounts)
|
|
{
|
|
dec_ucount(ucounts, UCOUNT_INOTIFY_INSTANCES);
|
|
}
|
|
|
|
static inline struct ucounts *inc_inotify_watches(struct ucounts *ucounts)
|
|
{
|
|
return inc_ucount(ucounts->ns, ucounts->uid, UCOUNT_INOTIFY_WATCHES);
|
|
}
|
|
|
|
static inline void dec_inotify_watches(struct ucounts *ucounts)
|
|
{
|
|
dec_ucount(ucounts, UCOUNT_INOTIFY_WATCHES);
|
|
}
|
|
#endif
|