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eventfs: Restructure eventfs_inode structure to be more condensed

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Some of the eventfs_inode structure has holes in it. Rework the structure
to be a bit more condensed, and also remove the no longer used llist
field.

Link: https://lore.kernel.org/linux-trace-kernel/20240201161617.002321438@goodmis.org

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Ajay Kaher <ajay.kaher@broadcom.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Google) 2024-02-01 10:34:48 -05:00
parent 5a49f99604
commit 264424dfdd
1 changed files with 12 additions and 15 deletions
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27
fs/tracefs/internal.h
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@ -32,40 +32,37 @@ struct eventfs_attr {
/*
* struct eventfs_inode - hold the properties of the eventfs directories.
* @list: link list into the parent directory
* @rcu: Union with @list for freeing
* @children: link list into the child eventfs_inode
* @entries: the array of entries representing the files in the directory
* @name: the name of the directory to create
* @children: link list into the child eventfs_inode
* @events_dir: the dentry of the events directory
* @entry_attrs: Saved mode and ownership of the @d_children
* @attr: Saved mode and ownership of eventfs_inode itself
* @data: The private data to pass to the callbacks
* @attr: Saved mode and ownership of eventfs_inode itself
* @is_freed: Flag set if the eventfs is on its way to be freed
* Note if is_freed is set, then dentry is corrupted.
* @is_events: Flag set for only the top level "events" directory
* @nr_entries: The number of items in @entries
* @ino: The saved inode number
*/
struct eventfs_inode {
struct kref kref;
struct list_head list;
union {
struct list_head list;
struct rcu_head rcu;
};
struct list_head children;
const struct eventfs_entry *entries;
const char *name;
struct list_head children;
struct dentry *events_dir;
struct eventfs_attr *entry_attrs;
struct eventfs_attr attr;
void *data;
struct eventfs_attr attr;
struct kref kref;
unsigned int is_freed:1;
unsigned int is_events:1;
unsigned int nr_entries:30;
unsigned int ino;
/*
* Union - used for deletion
* @llist: for calling dput() if needed after RCU
* @rcu: eventfs_inode to delete in RCU
*/
union {
struct llist_node llist;
struct rcu_head rcu;
};
};
static inline struct tracefs_inode *get_tracefs(const struct inode *inode)