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Subject[PATCH 15/19] BLOCK: Move the msdos device ioctl compat stuff to the msdos driver [try #5]
Date
From: David Howells <dhowells@redhat.com>

Move the msdos device ioctl compat stuff from fs/compat_ioctl.c to the msdos
driver so that the msdos header file doesn't need to be included.

Signed-Off-By: David Howells <dhowells@redhat.com>
---
fs/compat_ioctl.c | 49 ------------------------------------------------
fs/fat/dir.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 49 deletions(-)
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index e5eb0f1..e1a5643 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -108,7 +108,6 @@ #include <linux/usbdevice_fs.h>
#include <linux/nbd.h>
#include <linux/random.h>
#include <linux/filter.h>
-#include <linux/msdos_fs.h>
#include <linux/pktcdvd.h>

#include <linux/hiddev.h>
@@ -1937,51 +1936,6 @@ static int mtd_rw_oob(unsigned int fd, u
return err;
}

-#define VFAT_IOCTL_READDIR_BOTH32 _IOR('r', 1, struct compat_dirent[2])
-#define VFAT_IOCTL_READDIR_SHORT32 _IOR('r', 2, struct compat_dirent[2])
-
-static long
-put_dirent32 (struct dirent *d, struct compat_dirent __user *d32)
-{
- if (!access_ok(VERIFY_WRITE, d32, sizeof(struct compat_dirent)))
- return -EFAULT;
-
- __put_user(d->d_ino, &d32->d_ino);
- __put_user(d->d_off, &d32->d_off);
- __put_user(d->d_reclen, &d32->d_reclen);
- if (__copy_to_user(d32->d_name, d->d_name, d->d_reclen))
- return -EFAULT;
-
- return 0;
-}
-
-static int vfat_ioctl32(unsigned fd, unsigned cmd, unsigned long arg)
-{
- struct compat_dirent __user *p = compat_ptr(arg);
- int ret;
- mm_segment_t oldfs = get_fs();
- struct dirent d[2];
-
- switch(cmd)
- {
- case VFAT_IOCTL_READDIR_BOTH32:
- cmd = VFAT_IOCTL_READDIR_BOTH;
- break;
- case VFAT_IOCTL_READDIR_SHORT32:
- cmd = VFAT_IOCTL_READDIR_SHORT;
- break;
- }
-
- set_fs(KERNEL_DS);
- ret = sys_ioctl(fd,cmd,(unsigned long)&d);
- set_fs(oldfs);
- if (ret >= 0) {
- ret |= put_dirent32(&d[0], p);
- ret |= put_dirent32(&d[1], p + 1);
- }
- return ret;
-}
-
struct raw32_config_request
{
compat_int_t raw_minor;
@@ -2726,9 +2680,6 @@ HANDLE_IOCTL(SONET_GETFRSENSE, do_atm_io
HANDLE_IOCTL(BLKBSZGET_32, do_blkbszget)
HANDLE_IOCTL(BLKBSZSET_32, do_blkbszset)
HANDLE_IOCTL(BLKGETSIZE64_32, do_blkgetsize64)
-/* vfat */
-HANDLE_IOCTL(VFAT_IOCTL_READDIR_BOTH32, vfat_ioctl32)
-HANDLE_IOCTL(VFAT_IOCTL_READDIR_SHORT32, vfat_ioctl32)
/* Raw devices */
HANDLE_IOCTL(RAW_SETBIND, raw_ioctl)
HANDLE_IOCTL(RAW_GETBIND, raw_ioctl)
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 698b85b..8e99330 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -20,6 +20,7 @@ #include <linux/msdos_fs.h>
#include <linux/dirent.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
+#include <linux/compat.h>
#include <asm/uaccess.h>

static inline loff_t fat_make_i_pos(struct super_block *sb,
@@ -740,11 +741,64 @@ static int fat_dir_ioctl(struct inode *
ret = buf.result;
return ret;
}
+#define VFAT_IOCTL_READDIR_BOTH32 _IOR('r', 1, struct compat_dirent[2])
+#define VFAT_IOCTL_READDIR_SHORT32 _IOR('r', 2, struct compat_dirent[2])
+
+static long fat_compat_put_dirent32(struct dirent *d,
+ struct compat_dirent __user *d32)
+{
+ if (!access_ok(VERIFY_WRITE, d32, sizeof(struct compat_dirent)))
+ return -EFAULT;
+
+ __put_user(d->d_ino, &d32->d_ino);
+ __put_user(d->d_off, &d32->d_off);
+ __put_user(d->d_reclen, &d32->d_reclen);
+ if (__copy_to_user(d32->d_name, d->d_name, d->d_reclen))
+ return -EFAULT;
+
+ return 0;
+}
+
+static long fat_compat_dir_ioctl(struct file *file, unsigned cmd,
+ unsigned long arg)
+{
+ struct compat_dirent __user *p = compat_ptr(arg);
+ int ret;
+ mm_segment_t oldfs = get_fs();
+ struct dirent d[2];
+
+ switch (cmd) {
+ case VFAT_IOCTL_READDIR_BOTH32:
+ cmd = VFAT_IOCTL_READDIR_BOTH;
+ break;
+ case VFAT_IOCTL_READDIR_SHORT32:
+ cmd = VFAT_IOCTL_READDIR_SHORT;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ set_fs(KERNEL_DS);
+ lock_kernel();
+ ret = fat_dir_ioctl(file->f_dentry->d_inode, file,
+ cmd, (unsigned long) &d);
+ unlock_kernel();
+ set_fs(oldfs);
+ if (ret >= 0) {
+ ret |= fat_compat_put_dirent32(&d[0], p);
+ ret |= fat_compat_put_dirent32(&d[1], p + 1);
+ }
+ return ret;
+}
+

const struct file_operations fat_dir_operations = {
.read = generic_read_dir,
.readdir = fat_readdir,
.ioctl = fat_dir_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = fat_compat_dir_ioctl,
+#endif
.fsync = file_fsync,
};

-
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