[linux-2.6-block.git] / fs / sysfs / dir.c

/*
 * dir.c - Operations for sysfs directories.
 */

#undef DEBUG

#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/namei.h>
#include <asm/semaphore.h>
#include "sysfs.h"

DECLARE_RWSEM(sysfs_rename_sem);

static void sysfs_d_iput(struct dentry * dentry, struct inode * inode)
{
	struct sysfs_dirent * sd = dentry->d_fsdata;

	if (sd) {
		BUG_ON(sd->s_dentry != dentry);
		sd->s_dentry = NULL;
		sysfs_put(sd);
	}
	iput(inode);
}

static struct dentry_operations sysfs_dentry_ops = {
	.d_iput		= sysfs_d_iput,
};

/*
 * Allocates a new sysfs_dirent and links it to the parent sysfs_dirent
 */
static struct sysfs_dirent * __sysfs_new_dirent(void * element)
{
	struct sysfs_dirent * sd;

	sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
	if (!sd)
		return NULL;

	atomic_set(&sd->s_count, 1);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* dir.c - Operations for sysfs directories.
	3	*/
	4
	5	#undef DEBUG
	6
	7	#include <linux/fs.h>
	8	#include <linux/mount.h>
	9	#include <linux/module.h>
	10	#include <linux/kobject.h>
5f45f1a7	11	#include <linux/namei.h>
94bebf4d	12	#include <asm/semaphore.h>
1da177e4 LT	13	#include "sysfs.h"
	14
	15	DECLARE_RWSEM(sysfs_rename_sem);
	16
	17	static void sysfs_d_iput(struct dentry * dentry, struct inode * inode)
	18	{
	19	struct sysfs_dirent * sd = dentry->d_fsdata;
	20
	21	if (sd) {
	22	BUG_ON(sd->s_dentry != dentry);
	23	sd->s_dentry = NULL;
	24	sysfs_put(sd);
	25	}
	26	iput(inode);
	27	}
	28
	29	static struct dentry_operations sysfs_dentry_ops = {
	30	.d_iput = sysfs_d_iput,
	31	};
	32
	33	/*
	34	* Allocates a new sysfs_dirent and links it to the parent sysfs_dirent
	35	*/
b592fcfe	36	static struct sysfs_dirent * __sysfs_new_dirent(void * element)
1da177e4 LT	37	{
	38	struct sysfs_dirent * sd;
	39
c3762229	40	sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
1da177e4 LT	41	if (!sd)
	42	return NULL;
	43
1da177e4	44	atomic_set(&sd->s_count, 1);