#define FS_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
#define FS_IN_IGNORED 0x00008000 /* last inotify event here */
+#define FS_OPEN_PERM 0x00010000 /* open event in an permission hook */
+#define FS_ACCESS_PERM 0x00020000 /* access event in a permissions hook */
+
+#define FS_EXCL_UNLINK 0x04000000 /* do not send events if object is unlinked */
#define FS_IN_ISDIR 0x40000000 /* event occurred against dir */
#define FS_IN_ONESHOT 0x80000000 /* only send event once */
FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE |\
FS_DELETE)
-/* listeners that hard code group numbers near the top */
-#define DNOTIFY_GROUP_NUM UINT_MAX
-#define INOTIFY_GROUP_NUM (DNOTIFY_GROUP_NUM-1)
+#define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO)
+
+#define ALL_FSNOTIFY_EVENTS (FS_ACCESS | FS_MODIFY | FS_ATTRIB | \
+ FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | FS_OPEN | \
+ FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE | \
+ FS_DELETE | FS_DELETE_SELF | FS_MOVE_SELF | \
+ FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED | \
+ FS_OPEN_PERM | FS_ACCESS_PERM | FS_EXCL_UNLINK | \
+ FS_IN_ISDIR | FS_IN_ONESHOT | FS_DN_RENAME | \
+ FS_DN_MULTISHOT | FS_EVENT_ON_CHILD)
struct fsnotify_group;
struct fsnotify_event;
-struct fsnotify_mark_entry;
+struct fsnotify_mark;
struct fsnotify_event_private_data;
/*
* valid group and inode to use to clean up.
*/
struct fsnotify_ops {
- bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode, __u32 mask);
+ bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode,
+ struct vfsmount *mnt, __u32 mask, void *data,
+ int data_type);
int (*handle_event)(struct fsnotify_group *group, struct fsnotify_event *event);
void (*free_group_priv)(struct fsnotify_group *group);
- void (*freeing_mark)(struct fsnotify_mark_entry *entry, struct fsnotify_group *group);
+ void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
void (*free_event_priv)(struct fsnotify_event_private_data *priv);
};
struct fsnotify_group {
/*
* global list of all groups receiving events from fsnotify.
- * anchored by fsnotify_groups and protected by either fsnotify_grp_mutex
+ * anchored by fsnotify_inode_groups and protected by either fsnotify_grp_mutex
* or fsnotify_grp_srcu depending on write vs read.
*/
- struct list_head group_list;
+ struct list_head inode_group_list;
+ /*
+ * same as above except anchored by fsnotify_vfsmount_groups
+ */
+ struct list_head vfsmount_group_list;
/*
* Defines all of the event types in which this group is interested.
* closed.
*/
atomic_t refcnt; /* things with interest in this group */
- unsigned int group_num; /* simply prevents accidental group collision */
const struct fsnotify_ops *ops; /* how this group handles things */
unsigned int q_len; /* events on the queue */
unsigned int max_events; /* maximum events allowed on the list */
- /* stores all fastapth entries assoc with this group so they can be cleaned on unregister */
- spinlock_t mark_lock; /* protect mark_entries list */
- atomic_t num_marks; /* 1 for each mark entry and 1 for not being
+ /* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
+ spinlock_t mark_lock; /* protect marks_list */
+ atomic_t num_marks; /* 1 for each mark and 1 for not being
* past the point of no return when freeing
* a group */
- struct list_head mark_entries; /* all inode mark entries for this group */
+ struct list_head marks_list; /* all inode marks for this group */
/* prevents double list_del of group_list. protected by global fsnotify_grp_mutex */
- bool on_group_list;
+ bool on_inode_group_list;
+ bool on_vfsmount_group_list;
/* groups can define private fields here or use the void *private */
union {
struct user_struct *user;
} inotify_data;
#endif
+#ifdef CONFIG_FANOTIFY
+ struct fanotify_group_private_data {
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ /* allows a group to block waiting for a userspace response */
+ struct mutex access_mutex;
+ struct list_head access_list;
+ wait_queue_head_t access_waitq;
+#endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */
+ int f_flags;
+ } fanotify_data;
+#endif /* CONFIG_FANOTIFY */
};
};
/* to_tell may ONLY be dereferenced during handle_event(). */
struct inode *to_tell; /* either the inode the event happened to or its parent */
/*
- * depending on the event type we should have either a path or inode
- * We hold a reference on path, but NOT on inode. Since we have the ref on
- * the path, it may be dereferenced at any point during this object's
+ * depending on the event type we should have either a file or inode
+ * We hold a reference on file, but NOT on inode. Since we have the ref on
+ * the file, it may be dereferenced at any point during this object's
* lifetime. That reference is dropped when this object's refcnt hits
- * 0. If this event contains an inode instead of a path, the inode may
+ * 0. If this event contains an inode instead of a file, the inode may
* ONLY be used during handle_event().
*/
union {
- struct path path;
+ struct file *file;
struct inode *inode;
};
/* when calling fsnotify tell it if the data is a path or inode */
#define FSNOTIFY_EVENT_NONE 0
-#define FSNOTIFY_EVENT_PATH 1
+#define FSNOTIFY_EVENT_FILE 1
#define FSNOTIFY_EVENT_INODE 2
-#define FSNOTIFY_EVENT_FILE 3
int data_type; /* which of the above union we have */
atomic_t refcnt; /* how many groups still are using/need to send this event */
__u32 mask; /* the type of access, bitwise OR for FS_* event types */
u32 sync_cookie; /* used to corrolate events, namely inotify mv events */
- char *file_name;
+ const unsigned char *file_name;
size_t name_len;
+ struct pid *tgid;
+
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ __u32 response; /* userspace answer to question */
+#endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */
struct list_head private_data_list; /* groups can store private data here */
};
/*
- * a mark is simply an entry attached to an in core inode which allows an
+ * Inode specific fields in an fsnotify_mark
+ */
+struct fsnotify_inode_mark {
+ struct inode *inode; /* inode this mark is associated with */
+ struct hlist_node i_list; /* list of marks by inode->i_fsnotify_marks */
+ struct list_head free_i_list; /* tmp list used when freeing this mark */
+};
+
+/*
+ * Mount point specific fields in an fsnotify_mark
+ */
+struct fsnotify_vfsmount_mark {
+ struct vfsmount *mnt; /* vfsmount this mark is associated with */
+ struct hlist_node m_list; /* list of marks by inode->i_fsnotify_marks */
+ struct list_head free_m_list; /* tmp list used when freeing this mark */
+};
+
+/*
+ * 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
* of a type matching mask or only interested in those events.
*
* (such as dnotify) will flush these when the open fd is closed and not at
* inode eviction or modification.
*/
-struct fsnotify_mark_entry {
- __u32 mask; /* mask this mark entry is for */
+struct fsnotify_mark {
+ __u32 mask; /* mask this mark is for */
/* we hold ref for each i_list and g_list. also one ref for each 'thing'
* in kernel that found and may be using this mark. */
atomic_t refcnt; /* active things looking at this mark */
- struct inode *inode; /* inode this entry is associated with */
- struct fsnotify_group *group; /* group this mark entry is for */
- struct hlist_node i_list; /* list of mark_entries by inode->i_fsnotify_mark_entries */
- struct list_head g_list; /* list of mark_entries by group->i_fsnotify_mark_entries */
- spinlock_t lock; /* protect group, inode, and killme */
- struct list_head free_i_list; /* tmp list used when freeing this mark */
+ struct fsnotify_group *group; /* group this mark is for */
+ struct list_head g_list; /* list of marks by group->i_fsnotify_marks */
+ spinlock_t lock; /* protect group and inode */
+ union {
+ struct fsnotify_inode_mark i;
+ struct fsnotify_vfsmount_mark m;
+ };
+ __u32 ignored_mask; /* events types to ignore */
struct list_head free_g_list; /* tmp list used when freeing this mark */
- void (*free_mark)(struct fsnotify_mark_entry *entry); /* called on final put+free */
+#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
+ unsigned int flags; /* vfsmount or inode mark? */
+ void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */
};
#ifdef CONFIG_FSNOTIFY
/* called from the vfs helpers */
/* main fsnotify call to send events */
-extern void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
- const char *name, u32 cookie);
-extern void __fsnotify_parent(struct dentry *dentry, __u32 mask);
+extern int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
+ const unsigned char *name, u32 cookie);
+extern void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask);
extern void __fsnotify_inode_delete(struct inode *inode);
+extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
extern u32 fsnotify_get_cookie(void);
static inline int fsnotify_inode_watches_children(struct inode *inode)
/* must call when a group changes its ->mask */
extern void fsnotify_recalc_global_mask(void);
/* get a reference to an existing or create a new group */
-extern struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num,
- __u32 mask,
- const struct fsnotify_ops *ops);
+extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
/* run all marks associated with this group and update group->mask */
extern void fsnotify_recalc_group_mask(struct fsnotify_group *group);
-/* drop reference on a group from fsnotify_obtain_group */
+/* drop reference on a group from fsnotify_alloc_group */
extern void fsnotify_put_group(struct fsnotify_group *group);
/* take a reference to an event */
struct fsnotify_event *event);
/* attach the event to the group notification queue */
-extern int fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_event *event,
- struct fsnotify_event_private_data *priv);
+extern struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ struct fsnotify_event_private_data *priv,
+ struct fsnotify_event *(*merge)(struct list_head *,
+ struct fsnotify_event *));
/* true if the group notification queue is empty */
extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group);
/* return, but do not dequeue the first event on the notification queue */
/* functions used to manipulate the marks attached to inodes */
+/* 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_recalc_inode_mask(struct inode *inode);
-extern void fsnotify_init_mark(struct fsnotify_mark_entry *entry, void (*free_mark)(struct fsnotify_mark_entry *entry));
+extern void fsnotify_init_mark(struct fsnotify_mark *mark, void (*free_mark)(struct fsnotify_mark *mark));
/* find (and take a reference) to a mark associated with group and inode */
-extern struct fsnotify_mark_entry *fsnotify_find_mark_entry(struct fsnotify_group *group, struct inode *inode);
+extern struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *group, struct inode *inode);
+/* find (and take a reference) to a mark associated with group and vfsmount */
+extern struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group, struct vfsmount *mnt);
+/* copy the values from old into new */
+extern void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *old);
+/* set the ignored_mask of a mark */
+extern void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mask);
+/* set the mask of a mark (might pin the object into memory */
+extern void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask);
/* attach the mark to both the group and the inode */
-extern int fsnotify_add_mark(struct fsnotify_mark_entry *entry, struct fsnotify_group *group, struct inode *inode);
+extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
+ struct inode *inode, struct vfsmount *mnt, int allow_dups);
/* given a mark, flag it to be freed when all references are dropped */
-extern void fsnotify_destroy_mark_by_entry(struct fsnotify_mark_entry *entry);
+extern void fsnotify_destroy_mark(struct fsnotify_mark *mark);
+/* run all the marks in a group, and clear all of the vfsmount marks */
+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*/
+extern void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group, unsigned int flags);
/* run all the marks in a group, and flag them to be freed */
extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group);
-extern void fsnotify_get_mark(struct fsnotify_mark_entry *entry);
-extern void fsnotify_put_mark(struct fsnotify_mark_entry *entry);
+extern void fsnotify_get_mark(struct fsnotify_mark *mark);
+extern void fsnotify_put_mark(struct fsnotify_mark *mark);
extern void fsnotify_unmount_inodes(struct list_head *list);
/* put here because inotify does some weird stuff when destroying watches */
extern struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
- void *data, int data_is, const char *name,
+ void *data, int data_is,
+ const unsigned char *name,
u32 cookie, gfp_t gfp);
+/* fanotify likes to change events after they are on lists... */
+extern struct fsnotify_event *fsnotify_clone_event(struct fsnotify_event *old_event);
+extern int fsnotify_replace_event(struct fsnotify_event_holder *old_holder,
+ struct fsnotify_event *new_event);
+
#else
-static inline void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
- const char *name, u32 cookie)
-{}
+static inline int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
+ const unsigned char *name, u32 cookie)
+{
+ return 0;
+}
-static inline void __fsnotify_parent(struct dentry *dentry, __u32 mask)
+static inline void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
{}
static inline void __fsnotify_inode_delete(struct inode *inode)
{}
+static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
+{}
+
static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
{}
git.samba.org / sfrench / cifs-2.6.git / blobdiff