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Commit 21bea495 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by OGAWA Hirofumi
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fat: split fat_generic_ioctl 



Split up fat_generic_ioctl and add separate functions for the two
implemented ioctls.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
parent 85c78591

fs/fat/file.c

+94 −88
Original line number Diff line number Diff line
@@ -18,14 +18,7 @@ 
#include <linux/security.h>

#include "fat.h"



int fat_generic_ioctl(struct inode *inode, struct file *filp,

		      unsigned int cmd, unsigned long arg)

{

	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);

	u32 __user *user_attr = (u32 __user *)arg;



	switch (cmd) {

	case FAT_IOCTL_GET_ATTRIBUTES:

static int fat_ioctl_get_attributes(struct inode *inode, u32 __user *user_attr)

{

	u32 attr;
@@ -35,21 +28,24 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp, 


	return put_user(attr, user_attr);

}

	case FAT_IOCTL_SET_ATTRIBUTES:



static int fat_ioctl_set_attributes(struct file *file, u32 __user *user_attr)

{

	struct inode *inode = file->f_path.dentry->d_inode;

	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);

	int is_dir = S_ISDIR(inode->i_mode);

	u32 attr, oldattr;

		int err, is_dir = S_ISDIR(inode->i_mode);

	struct iattr ia;

	int err;



	err = get_user(attr, user_attr);

	if (err)

			return err;

		goto out;



	mutex_lock(&inode->i_mutex);



		err = mnt_want_write(filp->f_path.mnt);

	err = mnt_want_write(file->f_path.mnt);

	if (err)

			goto up_no_drop_write;

		goto out_unlock_inode;



	/*

	 * ATTR_VOLUME and ATTR_DIR cannot be changed; this also
@@ -76,16 +72,14 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp, 
	/* The root directory has no attributes */

	if (inode->i_ino == MSDOS_ROOT_INO && attr != ATTR_DIR) {

		err = -EINVAL;

			goto up;

		goto out_drop_write;

	}



		if (sbi->options.sys_immutable) {

			if ((attr | oldattr) & ATTR_SYS) {

				if (!capable(CAP_LINUX_IMMUTABLE)) {

	if (sbi->options.sys_immutable &&

	    ((attr | oldattr) & ATTR_SYS) &&

	    !capable(CAP_LINUX_IMMUTABLE)) {

		err = -EPERM;

					goto up;

				}

			}

		goto out_drop_write;

	}



	/*
@@ -93,16 +87,16 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp, 
	 * out the RO attribute for checking by the security

	 * module, just because it maps to a file mode.

	 */

		err = security_inode_setattr(filp->f_path.dentry, &ia);

	err = security_inode_setattr(file->f_path.dentry, &ia);

	if (err)

			goto up;

		goto out_drop_write;



	/* This MUST be done before doing anything irreversible... */

		err = fat_setattr(filp->f_path.dentry, &ia);

	err = fat_setattr(file->f_path.dentry, &ia);

	if (err)

			goto up;

		goto out_drop_write;



		fsnotify_change(filp->f_path.dentry, ia.ia_valid);

	fsnotify_change(file->f_path.dentry, ia.ia_valid);

	if (sbi->options.sys_immutable) {

		if (attr & ATTR_SYS)

			inode->i_flags |= S_IMMUTABLE;
@@ -112,12 +106,24 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp, 


	fat_save_attrs(inode, attr);

	mark_inode_dirty(inode);

up:

		mnt_drop_write(filp->f_path.mnt);

up_no_drop_write:

out_drop_write:

	mnt_drop_write(file->f_path.mnt);

out_unlock_inode:

	mutex_unlock(&inode->i_mutex);

out:

	return err;

}



int fat_generic_ioctl(struct inode *inode, struct file *filp,

		      unsigned int cmd, unsigned long arg)

{

	u32 __user *user_attr = (u32 __user *)arg;



	switch (cmd) {

	case FAT_IOCTL_GET_ATTRIBUTES:

		return fat_ioctl_get_attributes(inode, user_attr);

	case FAT_IOCTL_SET_ATTRIBUTES:

		return fat_ioctl_set_attributes(filp, user_attr);

	default:

		return -ENOTTY;	/* Inappropriate ioctl for device */

	}