mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-28 07:13:34 +00:00
75c1be487a
Currently reading the inode->i_fsnotify_marks or vfsmount->mnt_fsnotify_marks lists are protected by a spinlock on both the read and the write side. This patch protects the read side of those lists with a new single srcu. Signed-off-by: Eric Paris <eparis@redhat.com>
60 lines
2.6 KiB
C
60 lines
2.6 KiB
C
#ifndef __FS_NOTIFY_FSNOTIFY_H_
|
|
#define __FS_NOTIFY_FSNOTIFY_H_
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/fsnotify.h>
|
|
#include <linux/srcu.h>
|
|
#include <linux/types.h>
|
|
|
|
/* all groups which receive inode fsnotify events */
|
|
extern struct list_head fsnotify_inode_groups;
|
|
/* all groups which receive vfsmount fsnotify events */
|
|
extern struct list_head fsnotify_vfsmount_groups;
|
|
/* all bitwise OR of all event types (FS_*) for all fsnotify_inode_groups */
|
|
extern __u32 fsnotify_inode_mask;
|
|
/* all bitwise OR of all event types (FS_*) for all fsnotify_vfsmount_groups */
|
|
extern __u32 fsnotify_vfsmount_mask;
|
|
|
|
/* destroy all events sitting in this groups notification queue */
|
|
extern void fsnotify_flush_notify(struct fsnotify_group *group);
|
|
|
|
/* protects reads of inode and vfsmount marks list */
|
|
extern struct srcu_struct fsnotify_mark_srcu;
|
|
|
|
extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
|
|
__u32 mask);
|
|
/* add a mark to an inode */
|
|
extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
|
|
struct fsnotify_group *group, struct inode *inode,
|
|
int allow_dups);
|
|
/* add a mark to a vfsmount */
|
|
extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
|
|
struct fsnotify_group *group, struct vfsmount *mnt,
|
|
int allow_dups);
|
|
|
|
/* add a group to the inode group list */
|
|
extern void fsnotify_add_inode_group(struct fsnotify_group *group);
|
|
/* add a group to the vfsmount group list */
|
|
extern void fsnotify_add_vfsmount_group(struct fsnotify_group *group);
|
|
/* final kfree of a group */
|
|
extern void fsnotify_final_destroy_group(struct fsnotify_group *group);
|
|
|
|
/* vfsmount specific destruction of a mark */
|
|
extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);
|
|
/* inode specific destruction of a mark */
|
|
extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);
|
|
/* run the list of all marks associated with inode and flag them to be freed */
|
|
extern void fsnotify_clear_marks_by_inode(struct inode *inode);
|
|
/* run the list of all marks associated with vfsmount and flag them to be freed */
|
|
extern void fsnotify_clear_marks_by_mount(struct vfsmount *mnt);
|
|
/*
|
|
* update the dentry->d_flags of all of inode's children to indicate if inode cares
|
|
* about events that happen to its children.
|
|
*/
|
|
extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
|
|
|
|
/* allocate and destroy and event holder to attach events to notification/access queues */
|
|
extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
|
|
extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
|
|
|
|
#endif /* __FS_NOTIFY_FSNOTIFY_H_ */
|