1ba37ff75SAjay Kaher /* SPDX-License-Identifier: GPL-2.0 */
2ba37ff75SAjay Kaher #ifndef _TRACEFS_INTERNAL_H
3ba37ff75SAjay Kaher #define _TRACEFS_INTERNAL_H
4ba37ff75SAjay Kaher
5c1504e51SAjay Kaher enum {
6c1504e51SAjay Kaher TRACEFS_EVENT_INODE = BIT(1),
79879e5e1SSteven Rostedt (Google) TRACEFS_EVENT_TOP_INODE = BIT(2),
8628adb84SSteven Rostedt (Google) TRACEFS_GID_PERM_SET = BIT(3),
9628adb84SSteven Rostedt (Google) TRACEFS_UID_PERM_SET = BIT(4),
10628adb84SSteven Rostedt (Google) TRACEFS_INSTANCE_INODE = BIT(5),
11c1504e51SAjay Kaher };
12c1504e51SAjay Kaher
13ba37ff75SAjay Kaher struct tracefs_inode {
145f91fc82SSteven Rostedt (Google) union {
15f0686a19SSteven Rostedt (Google) struct inode vfs_inode;
165f91fc82SSteven Rostedt (Google) struct rcu_head rcu;
175f91fc82SSteven Rostedt (Google) };
18f0686a19SSteven Rostedt (Google) /* The below gets initialized with memset_after(ti, 0, vfs_inode) */
195f91fc82SSteven Rostedt (Google) struct list_head list;
20ba37ff75SAjay Kaher unsigned long flags;
21ba37ff75SAjay Kaher void *private;
22ba37ff75SAjay Kaher };
23ba37ff75SAjay Kaher
2435ee34c0SSteven Rostedt (Google) /*
2532f4c167SSteven Rostedt (Google) * struct eventfs_attr - cache the mode and ownership of a eventfs entry
2632f4c167SSteven Rostedt (Google) * @mode: saved mode plus flags of what is saved
2732f4c167SSteven Rostedt (Google) * @uid: saved uid if changed
2832f4c167SSteven Rostedt (Google) * @gid: saved gid if changed
2932f4c167SSteven Rostedt (Google) */
3032f4c167SSteven Rostedt (Google) struct eventfs_attr {
3132f4c167SSteven Rostedt (Google) int mode;
3232f4c167SSteven Rostedt (Google) kuid_t uid;
3332f4c167SSteven Rostedt (Google) kgid_t gid;
3432f4c167SSteven Rostedt (Google) };
3532f4c167SSteven Rostedt (Google)
3632f4c167SSteven Rostedt (Google) /*
3735ee34c0SSteven Rostedt (Google) * struct eventfs_inode - hold the properties of the eventfs directories.
3835ee34c0SSteven Rostedt (Google) * @list: link list into the parent directory
39ed823ca4SSteven Rostedt (Google) * @rcu: Union with @list for freeing
40ed823ca4SSteven Rostedt (Google) * @children: link list into the child eventfs_inode
4135ee34c0SSteven Rostedt (Google) * @entries: the array of entries representing the files in the directory
4235ee34c0SSteven Rostedt (Google) * @name: the name of the directory to create
435dfb0410SLinus Torvalds * @events_dir: the dentry of the events directory
4432f4c167SSteven Rostedt (Google) * @entry_attrs: Saved mode and ownership of the @d_children
4535ee34c0SSteven Rostedt (Google) * @data: The private data to pass to the callbacks
46ed823ca4SSteven Rostedt (Google) * @attr: Saved mode and ownership of eventfs_inode itself
474bb123ceSSteven Rostedt (Google) * @is_freed: Flag set if the eventfs is on its way to be freed
48d2a632aeSSteven Rostedt (Google) * Note if is_freed is set, then dentry is corrupted.
49ed823ca4SSteven Rostedt (Google) * @is_events: Flag set for only the top level "events" directory
5035ee34c0SSteven Rostedt (Google) * @nr_entries: The number of items in @entries
51ed823ca4SSteven Rostedt (Google) * @ino: The saved inode number
5235ee34c0SSteven Rostedt (Google) */
5335ee34c0SSteven Rostedt (Google) struct eventfs_inode {
54ed823ca4SSteven Rostedt (Google) union {
5535ee34c0SSteven Rostedt (Google) struct list_head list;
56ed823ca4SSteven Rostedt (Google) struct rcu_head rcu;
57ed823ca4SSteven Rostedt (Google) };
58ed823ca4SSteven Rostedt (Google) struct list_head children;
5935ee34c0SSteven Rostedt (Google) const struct eventfs_entry *entries;
6035ee34c0SSteven Rostedt (Google) const char *name;
615dfb0410SLinus Torvalds struct dentry *events_dir;
6232f4c167SSteven Rostedt (Google) struct eventfs_attr *entry_attrs;
6335ee34c0SSteven Rostedt (Google) void *data;
64ed823ca4SSteven Rostedt (Google) struct eventfs_attr attr;
65ed823ca4SSteven Rostedt (Google) struct kref kref;
669a187657SSteven Rostedt (Google) unsigned int is_freed:1;
679a187657SSteven Rostedt (Google) unsigned int is_events:1;
689a187657SSteven Rostedt (Google) unsigned int nr_entries:30;
699a187657SSteven Rostedt (Google) unsigned int ino;
7035ee34c0SSteven Rostedt (Google) };
7135ee34c0SSteven Rostedt (Google)
get_tracefs(const struct inode * inode)72ba37ff75SAjay Kaher static inline struct tracefs_inode *get_tracefs(const struct inode *inode)
73ba37ff75SAjay Kaher {
74ba37ff75SAjay Kaher return container_of(inode, struct tracefs_inode, vfs_inode);
75ba37ff75SAjay Kaher }
762c6b6b10SAjay Kaher
772c6b6b10SAjay Kaher struct dentry *tracefs_start_creating(const char *name, struct dentry *parent);
782c6b6b10SAjay Kaher struct dentry *tracefs_end_creating(struct dentry *dentry);
792c6b6b10SAjay Kaher struct dentry *tracefs_failed_creating(struct dentry *dentry);
802c6b6b10SAjay Kaher struct inode *tracefs_get_inode(struct super_block *sb);
81c4619205SLinus Torvalds
825f91fc82SSteven Rostedt (Google) void eventfs_remount(struct tracefs_inode *ti, bool update_uid, bool update_gid);
83c4619205SLinus Torvalds void eventfs_d_release(struct dentry *dentry);
8463940449SAjay Kaher
85ba37ff75SAjay Kaher #endif /* _TRACEFS_INTERNAL_H */
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