linux/fs/configfs/inode.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * inode.c - basic inode and dentry operations.
 *
 * Based on sysfs:
 * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
 *
 * configfs Copyright (C) 2005 Oracle.  All rights reserved.
 *
 * Please see Documentation/filesystems/configfs.rst for more
 * information.
 */

#undef DEBUG

#include <linux/pagemap.h>
#include <linux/namei.h>
#include <linux/backing-dev.h>
#include <linux/capability.h>
#include <linux/sched.h>
#include <linux/lockdep.h>
#include <linux/slab.h>

#include <linux/configfs.h>
#include "configfs_internal.h"

#ifdef CONFIG_LOCKDEP
static struct lock_class_key default_group_class[MAX_LOCK_DEPTH];
#endif

static const struct inode_operations configfs_inode_operations = …;

int configfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
		     struct iattr *iattr)
{ … }

static inline void set_default_inode_attr(struct inode * inode, umode_t mode)
{ … }

static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
{ … }

struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent *sd,
				 struct super_block *s)
{ … }

#ifdef CONFIG_LOCKDEP

static void configfs_set_inode_lock_class(struct configfs_dirent *sd,
					  struct inode *inode)
{ … }

#else /* CONFIG_LOCKDEP */

static void configfs_set_inode_lock_class(struct configfs_dirent *sd,
					  struct inode *inode)
{
}

#endif /* CONFIG_LOCKDEP */

struct inode *configfs_create(struct dentry *dentry, umode_t mode)
{ … }

/*
 * Get the name for corresponding element represented by the given configfs_dirent
 */
const unsigned char * configfs_get_name(struct configfs_dirent *sd)
{ … }


/*
 * Unhashes the dentry corresponding to given configfs_dirent
 * Called with parent inode's i_mutex held.
 */
void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent)
{ … }

void configfs_hash_and_remove(struct dentry * dir, const char * name)
{ … }