diff options
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0a14b495532f..f3fd7e2cbc38 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -37,7 +37,7 @@ #include <linux/ctype.h> #include <linux/namei.h> #include <linux/miscdevice.h> -#include <linux/version.h> +#include <linux/magic.h> #include "compat.h" #include "ctree.h" #include "disk-io.h" @@ -51,7 +51,6 @@ #include "export.h" #include "compression.h" -#define BTRFS_SUPER_MAGIC 0x9123683E static struct super_operations btrfs_super_ops; @@ -582,18 +581,20 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, { struct btrfs_ioctl_vol_args *vol; struct btrfs_fs_devices *fs_devices; - int ret = 0; - int len; + int ret = -ENOTTY; if (!capable(CAP_SYS_ADMIN)) return -EPERM; vol = kmalloc(sizeof(*vol), GFP_KERNEL); + if (!vol) + return -ENOMEM; + if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) { ret = -EFAULT; goto out; } - len = strnlen(vol->name, BTRFS_PATH_NAME_MAX); + switch (cmd) { case BTRFS_IOC_SCAN_DEV: ret = btrfs_scan_one_device(vol->name, FMODE_READ, |