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d53891d348
The toplevel events directory is really no different than the events
directory of instances. Having the two be different caused
inconsistencies and made it harder to fix the permissions bugs.
Make all events directories act the same.
Link: https://lore.kernel.org/linux-trace-kernel/20240502200905.846448710@goodmis.org
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: 8186fff7ab ("tracefs/eventfs: Use root and instance inodes as default ownership")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TRACEFS_INTERNAL_H
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#define _TRACEFS_INTERNAL_H
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enum {
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TRACEFS_EVENT_INODE = BIT(1),
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TRACEFS_GID_PERM_SET = BIT(2),
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TRACEFS_UID_PERM_SET = BIT(3),
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TRACEFS_INSTANCE_INODE = BIT(4),
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};
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struct tracefs_inode {
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union {
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struct inode vfs_inode;
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struct rcu_head rcu;
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};
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/* The below gets initialized with memset_after(ti, 0, vfs_inode) */
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struct list_head list;
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unsigned long flags;
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void *private;
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};
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/*
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* struct eventfs_attr - cache the mode and ownership of a eventfs entry
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* @mode: saved mode plus flags of what is saved
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* @uid: saved uid if changed
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* @gid: saved gid if changed
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*/
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struct eventfs_attr {
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int mode;
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kuid_t uid;
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kgid_t gid;
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};
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/*
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* struct eventfs_inode - hold the properties of the eventfs directories.
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* @list: link list into the parent directory
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* @rcu: Union with @list for freeing
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* @children: link list into the child eventfs_inode
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* @entries: the array of entries representing the files in the directory
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* @name: the name of the directory to create
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* @entry_attrs: Saved mode and ownership of the @d_children
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* @data: The private data to pass to the callbacks
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* @attr: Saved mode and ownership of eventfs_inode itself
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* @is_freed: Flag set if the eventfs is on its way to be freed
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* Note if is_freed is set, then dentry is corrupted.
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* @is_events: Flag set for only the top level "events" directory
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* @nr_entries: The number of items in @entries
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* @ino: The saved inode number
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*/
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struct eventfs_inode {
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union {
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struct list_head list;
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struct rcu_head rcu;
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};
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struct list_head children;
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const struct eventfs_entry *entries;
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const char *name;
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struct eventfs_attr *entry_attrs;
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void *data;
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struct eventfs_attr attr;
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struct kref kref;
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unsigned int is_freed:1;
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unsigned int is_events:1;
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unsigned int nr_entries:30;
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unsigned int ino;
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};
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static inline struct tracefs_inode *get_tracefs(const struct inode *inode)
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{
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return container_of(inode, struct tracefs_inode, vfs_inode);
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}
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struct dentry *tracefs_start_creating(const char *name, struct dentry *parent);
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struct dentry *tracefs_end_creating(struct dentry *dentry);
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struct dentry *tracefs_failed_creating(struct dentry *dentry);
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struct inode *tracefs_get_inode(struct super_block *sb);
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void eventfs_remount(struct tracefs_inode *ti, bool update_uid, bool update_gid);
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void eventfs_d_release(struct dentry *dentry);
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#endif /* _TRACEFS_INTERNAL_H */
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