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fat: convert to unlocked_ioctl

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FAT does not require the BKL in its ioctl function, which is already serialized
through a mutex. Since we're already touching the ioctl code, also fix the
missing handling of FAT_IOCTL_GET_ATTRIBUTES in the compat code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
This commit is contained in:
Arnd Bergmann 2010-05-17 08:13:47 +09:00 committed by OGAWA Hirofumi
parent 1bdb6f9199
commit 7845bc3e13
3 changed files with 24 additions and 10 deletions
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11
fs/fat/dir.c
View File

@ -753,9 +753,10 @@ static int fat_ioctl_readdir(struct inode *inode, struct file *filp,
return ret;
}
static int fat_dir_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
static long fat_dir_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct __fat_dirent __user *d1 = (struct __fat_dirent __user *)arg;
int short_only, both;
@ -769,7 +770,7 @@ static int fat_dir_ioctl(struct inode *inode, struct file *filp,
both = 1;
break;
default:
return fat_generic_ioctl(inode, filp, cmd, arg);
return fat_generic_ioctl(filp, cmd, arg);
}
if (!access_ok(VERIFY_WRITE, d1, sizeof(struct __fat_dirent[2])))
@ -809,7 +810,7 @@ static long fat_compat_dir_ioctl(struct file *filp, unsigned cmd,
both = 1;
break;
default:
return -ENOIOCTLCMD;
return fat_generic_ioctl(filp, cmd, (unsigned long)arg);
}
if (!access_ok(VERIFY_WRITE, d1, sizeof(struct compat_dirent[2])))
@ -831,7 +832,7 @@ const struct file_operations fat_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = fat_readdir,
.ioctl = fat_dir_ioctl,
.unlocked_ioctl = fat_dir_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = fat_compat_dir_ioctl,
#endif

4
fs/fat/fat.h
View File

@ -298,8 +298,8 @@ extern int fat_free_clusters(struct inode *inode, int cluster);
extern int fat_count_free_clusters(struct super_block *sb);
/* fat/file.c */
extern int fat_generic_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg);
extern long fat_generic_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg);
extern const struct file_operations fat_file_operations;
extern const struct inode_operations fat_file_inode_operations;
extern int fat_setattr(struct dentry * dentry, struct iattr * attr);

19
fs/fat/file.c
View File

@ -8,6 +8,7 @@
#include <linux/capability.h>
#include <linux/module.h>
#include <linux/compat.h>
#include <linux/mount.h>
#include <linux/time.h>
#include <linux/buffer_head.h>
@ -114,9 +115,9 @@ out:
return err;
}
int fat_generic_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = filp->f_path.dentry->d_inode;
u32 __user *user_attr = (u32 __user *)arg;
switch (cmd) {
@ -129,6 +130,15 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
}
}
#ifdef CONFIG_COMPAT
static long fat_generic_compat_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
return fat_generic_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
}
#endif
static int fat_file_release(struct inode *inode, struct file *filp)
{
if ((filp->f_mode & FMODE_WRITE) &&
@ -159,7 +169,10 @@ const struct file_operations fat_file_operations = {
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.release = fat_file_release,
.ioctl = fat_generic_ioctl,
.unlocked_ioctl = fat_generic_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = fat_generic_compat_ioctl,
#endif
.fsync = fat_file_fsync,
.splice_read = generic_file_splice_read,
};