diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/compat_ioctl.c | 49 | ||||
| -rw-r--r-- | fs/fat/dir.c | 56 |
2 files changed, 56 insertions, 49 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index e5eb0f10f05..e1a56437040 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -108,7 +108,6 @@ #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, unsigned int cmd, unsigned long arg) 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_ioctl) 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 698b85bb1dd..3e50a416628 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -20,6 +20,7 @@ #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, @@ -741,10 +742,65 @@ static int fat_dir_ioctl(struct inode * inode, struct file * filp, return ret; } +#ifdef CONFIG_COMPAT +#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; +} +#endif /* CONFIG_COMPAT */ + 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, }; |