struct fsnotify_mark;
struct fsnotify_event_private_data;
struct fsnotify_fname;
+struct fsnotify_iter_info;
/*
* Each group much define these ops. The fsnotify infrastructure will call
struct fsnotify_event *overflow_event; /* Event we queue when the
* notification list is too
* full */
+ atomic_t user_waits; /* Number of tasks waiting for user
+ * response */
/* groups can define private fields here or use the void *private */
union {
#define FSNOTIFY_EVENT_PATH 1
#define FSNOTIFY_EVENT_INODE 2
+/*
+ * Inode / vfsmount point to this structure which tracks all marks attached to
+ * the inode / vfsmount. The reference to inode / vfsmount is held by this
+ * structure. We destroy this structure when there are no more marks attached
+ * to it. The structure is protected by fsnotify_mark_srcu.
+ */
+struct fsnotify_mark_connector {
+ spinlock_t lock;
+#define FSNOTIFY_OBJ_TYPE_INODE 0x01
+#define FSNOTIFY_OBJ_TYPE_VFSMOUNT 0x02
+ unsigned int flags; /* Type of object [lock] */
+ union { /* Object pointer [lock] */
+ struct inode *inode;
+ struct vfsmount *mnt;
+ };
+ union {
+ struct hlist_head list;
+ /* Used listing heads to free after srcu period expires */
+ struct fsnotify_mark_connector *destroy_next;
+ };
+};
+
/*
* A mark is simply an object attached to an in core inode which allows an
* fsnotify listener to indicate they are either no longer interested in events
struct list_head g_list;
/* Protects inode / mnt pointers, flags, masks */
spinlock_t lock;
- /* List of marks for inode / vfsmount [obj_lock] */
+ /* List of marks for inode / vfsmount [connector->lock, mark ref] */
struct hlist_node obj_list;
- union { /* Object pointer [mark->lock, group->mark_mutex] */
- struct inode *inode; /* inode this mark is associated with */
- struct vfsmount *mnt; /* vfsmount this mark is associated with */
- };
+ /* Head of list of marks for an object [mark ref] */
+ struct fsnotify_mark_connector *connector;
/* Events types to ignore [mark->lock, group->mark_mutex] */
__u32 ignored_mask;
-#define FSNOTIFY_MARK_FLAG_INODE 0x01
-#define FSNOTIFY_MARK_FLAG_VFSMOUNT 0x02
-#define FSNOTIFY_MARK_FLAG_OBJECT_PINNED 0x04
-#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x08
-#define FSNOTIFY_MARK_FLAG_ALIVE 0x10
-#define FSNOTIFY_MARK_FLAG_ATTACHED 0x20
+#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x01
+#define FSNOTIFY_MARK_FLAG_ALIVE 0x02
+#define FSNOTIFY_MARK_FLAG_ATTACHED 0x04
unsigned int flags; /* flags [mark->lock] */
void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */
};
/* functions used to manipulate the marks attached to inodes */
+/* Calculate mask of events for a list of marks */
+extern void fsnotify_recalc_mask(struct fsnotify_mark_connector *conn);
/* run all marks associated with a vfsmount and update mnt->mnt_fsnotify_mask */
extern void fsnotify_recalc_vfsmount_mask(struct vfsmount *mnt);
/* run all marks associated with an inode and update inode->i_fsnotify_mask */
extern void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group);
/* run all the marks in a group, and clear all of the inode marks */
extern void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group);
-/* run all the marks in a group, and clear all of the marks where mark->flags & flags is true*/
+/* run all the marks in a group, and clear all of the marks attached to given object type */
extern void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group, unsigned int flags);
extern void fsnotify_get_mark(struct fsnotify_mark *mark);
extern void fsnotify_put_mark(struct fsnotify_mark *mark);
extern void fsnotify_unmount_inodes(struct super_block *sb);
+extern void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info);
+extern bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info);
/* put here because inotify does some weird stuff when destroying watches */
extern void fsnotify_init_event(struct fsnotify_event *event,