ext4: take handling of EXT4_IOC_GROUP_ADD into a helper, get rid of set_fs()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index afb66d4..aafba62 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -583,6 +583,44 @@ static int ext4_ioc_getfsmap(struct super_block *sb,
return 0;
}
+static long ext4_ioctl_group_add(struct file *file,
+ struct ext4_new_group_data *input)
+{
+ struct super_block *sb = file_inode(file)->i_sb;
+ int err, err2=0;
+
+ err = ext4_resize_begin(sb);
+ if (err)
+ return err;
+
+ if (ext4_has_feature_bigalloc(sb)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online resizing not supported with bigalloc");
+ err = -EOPNOTSUPP;
+ goto group_add_out;
+ }
+
+ err = mnt_want_write_file(file);
+ if (err)
+ goto group_add_out;
+
+ err = ext4_group_add(sb, input);
+ if (EXT4_SB(sb)->s_journal) {
+ jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+ err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
+ jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+ }
+ if (err == 0)
+ err = err2;
+ mnt_drop_write_file(file);
+ if (!err && ext4_has_group_desc_csum(sb) &&
+ test_opt(sb, INIT_INODE_TABLE))
+ err = ext4_register_li_request(sb, input->group);
+group_add_out:
+ ext4_resize_end(sb);
+ return err;
+}
+
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -767,44 +805,12 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
case EXT4_IOC_GROUP_ADD: {
struct ext4_new_group_data input;
- int err, err2=0;
-
- err = ext4_resize_begin(sb);
- if (err)
- return err;
if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
- sizeof(input))) {
- err = -EFAULT;
- goto group_add_out;
- }
+ sizeof(input)))
+ return -EFAULT;
- if (ext4_has_feature_bigalloc(sb)) {
- ext4_msg(sb, KERN_ERR,
- "Online resizing not supported with bigalloc");
- err = -EOPNOTSUPP;
- goto group_add_out;
- }
-
- err = mnt_want_write_file(filp);
- if (err)
- goto group_add_out;
-
- err = ext4_group_add(sb, &input);
- if (EXT4_SB(sb)->s_journal) {
- jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
- err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
- jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
- }
- if (err == 0)
- err = err2;
- mnt_drop_write_file(filp);
- if (!err && ext4_has_group_desc_csum(sb) &&
- test_opt(sb, INIT_INODE_TABLE))
- err = ext4_register_li_request(sb, input.group);
-group_add_out:
- ext4_resize_end(sb);
- return err;
+ return ext4_ioctl_group_add(filp, &input);
}
case EXT4_IOC_MIGRATE:
@@ -1075,8 +1081,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
break;
case EXT4_IOC32_GROUP_ADD: {
struct compat_ext4_new_group_input __user *uinput;
- struct ext4_new_group_input input;
- mm_segment_t old_fs;
+ struct ext4_new_group_data input;
int err;
uinput = compat_ptr(arg);
@@ -1089,12 +1094,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
&uinput->reserved_blocks);
if (err)
return -EFAULT;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
- (unsigned long) &input);
- set_fs(old_fs);
- return err;
+ return ext4_ioctl_group_add(file, &input);
}
case EXT4_IOC_MOVE_EXT:
case EXT4_IOC_RESIZE_FS: