1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _TRACEFS_INTERNAL_H
3 #define _TRACEFS_INTERNAL_H
6 TRACEFS_EVENT_INODE = BIT(1),
7 TRACEFS_GID_PERM_SET = BIT(2),
8 TRACEFS_UID_PERM_SET = BIT(3),
9 TRACEFS_INSTANCE_INODE = BIT(4),
12 struct tracefs_inode {
14 struct inode vfs_inode;
17 /* The below gets initialized with memset_after(ti, 0, vfs_inode) */
18 struct list_head list;
24 * struct eventfs_attr - cache the mode and ownership of a eventfs entry
25 * @mode: saved mode plus flags of what is saved
26 * @uid: saved uid if changed
27 * @gid: saved gid if changed
36 * struct eventfs_inode - hold the properties of the eventfs directories.
37 * @list: link list into the parent directory
38 * @rcu: Union with @list for freeing
39 * @children: link list into the child eventfs_inode
40 * @entries: the array of entries representing the files in the directory
41 * @name: the name of the directory to create
42 * @entry_attrs: Saved mode and ownership of the @d_children
43 * @data: The private data to pass to the callbacks
44 * @attr: Saved mode and ownership of eventfs_inode itself
45 * @is_freed: Flag set if the eventfs is on its way to be freed
46 * Note if is_freed is set, then dentry is corrupted.
47 * @is_events: Flag set for only the top level "events" directory
48 * @nr_entries: The number of items in @entries
49 * @ino: The saved inode number
51 struct eventfs_inode {
53 struct list_head list;
56 struct list_head children;
57 const struct eventfs_entry *entries;
59 struct eventfs_attr *entry_attrs;
61 struct eventfs_attr attr;
63 unsigned int is_freed:1;
64 unsigned int is_events:1;
65 unsigned int nr_entries:30;
69 static inline struct tracefs_inode *get_tracefs(const struct inode *inode)
71 return container_of(inode, struct tracefs_inode, vfs_inode);
74 struct dentry *tracefs_start_creating(const char *name, struct dentry *parent);
75 struct dentry *tracefs_end_creating(struct dentry *dentry);
76 struct dentry *tracefs_failed_creating(struct dentry *dentry);
77 struct inode *tracefs_get_inode(struct super_block *sb);
79 void eventfs_remount(struct tracefs_inode *ti, bool update_uid, bool update_gid);
80 void eventfs_d_release(struct dentry *dentry);
82 #endif /* _TRACEFS_INTERNAL_H */