Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

[sfrench/cifs-2.6.git] / fs / btrfs / ioctl.c

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7594bec1be10066619db8ebb578d03f5d2101de1..2624b53ea7830d54c89ea92145c7e9382775755a 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -437,10 +437,6 @@ out_unlock:
        return 0;
 }
 
-/*
- * Called inside transaction, so use GFP_NOFS
- */
-
 static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg)
 {
        u64 new_size;
@@ -461,15 +457,9 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg)
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
 
-       vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
-
-       if (!vol_args)
-               return -ENOMEM;
-
-       if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
-               ret = -EFAULT;
-               goto out;
-       }
+       vol_args = memdup_user(arg, sizeof(*vol_args));
+       if (IS_ERR(vol_args))
+               return PTR_ERR(vol_args);
 
        vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
        namelen = strlen(vol_args->name);
@@ -483,11 +473,13 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg)
                *devstr = '\0';
                devstr = vol_args->name;
                devid = simple_strtoull(devstr, &end, 10);
-               printk(KERN_INFO "resizing devid %llu\n", devid);
+               printk(KERN_INFO "resizing devid %llu\n",
+                      (unsigned long long)devid);
        }
        device = btrfs_find_device(root, devid, NULL, NULL);
        if (!device) {
-               printk(KERN_INFO "resizer unable to find device %llu\n", devid);
+               printk(KERN_INFO "resizer unable to find device %llu\n",
+                      (unsigned long long)devid);
                ret = -EINVAL;
                goto out_unlock;
        }
@@ -545,7 +537,6 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg)
 
 out_unlock:
        mutex_unlock(&root->fs_info->volume_mutex);
-out:
        kfree(vol_args);
        return ret;
 }
@@ -565,15 +556,9 @@ static noinline int btrfs_ioctl_snap_create(struct file *file,
        if (root->fs_info->sb->s_flags & MS_RDONLY)
                return -EROFS;
 
-       vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
-
-       if (!vol_args)
-               return -ENOMEM;
-
-       if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
-               ret = -EFAULT;
-               goto out;
-       }
+       vol_args = memdup_user(arg, sizeof(*vol_args));
+       if (IS_ERR(vol_args))
+               return PTR_ERR(vol_args);
 
        vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
        namelen = strlen(vol_args->name);
@@ -675,19 +660,13 @@ static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
 
-       vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
-
-       if (!vol_args)
-               return -ENOMEM;
+       vol_args = memdup_user(arg, sizeof(*vol_args));
+       if (IS_ERR(vol_args))
+               return PTR_ERR(vol_args);
 
-       if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
-               ret = -EFAULT;
-               goto out;
-       }
        vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
        ret = btrfs_init_new_device(root, vol_args->name);
 
-out:
        kfree(vol_args);
        return ret;
 }
@@ -703,19 +682,13 @@ static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
        if (root->fs_info->sb->s_flags & MS_RDONLY)
                return -EROFS;
 
-       vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
-
-       if (!vol_args)
-               return -ENOMEM;
+       vol_args = memdup_user(arg, sizeof(*vol_args));
+       if (IS_ERR(vol_args))
+               return PTR_ERR(vol_args);
 
-       if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
-               ret = -EFAULT;
-               goto out;
-       }
        vol_args->name[BTRFS_PATH_NAME_MAX] = '\0';
        ret = btrfs_rm_device(root, vol_args->name);
 
-out:
        kfree(vol_args);
        return ret;
 }
@@ -830,7 +803,8 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
        BUG_ON(!trans);
 
        /* punch hole in destination first */
-       btrfs_drop_extents(trans, root, inode, off, off+len, 0, &hint_byte);
+       btrfs_drop_extents(trans, root, inode, off, off + len,
+                          off + len, 0, &hint_byte);
 
        /* clone data */
        key.objectid = src->i_ino;