Commit 3558d4f88ec8 ("btrfs: Deprecate userspace transaction ioctls")
marked the beginning of the end of userspace transaction. This commit
finishes the job!
---
fs/btrfs/ioctl.c | 95 --------------------------------------------------------
1 file changed, 95 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f573cad72b7e..3094e079fc4f 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3935,73 +3935,6 @@ int btrfs_clone_file_range(struct file *src_file, loff_t
off,
return btrfs_clone_files(dst_file, src_file, off, len, destoff);
}
-/*
- * there are many ways the trans_start and trans_end ioctls can lead
- * to deadlocks. They should only be used by applications that
- * basically own the machine, and have a very in depth understanding
- * of all the possible deadlocks and enospc problems.
- */
-static long btrfs_ioctl_trans_start(struct file *file)
-{
- struct inode *inode = file_inode(file);
- struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
- struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_trans_handle *trans;
- struct btrfs_file_private *private;
- int ret;
- static bool warned = false;
-
- ret = -EPERM;
- if (!capable(CAP_SYS_ADMIN))
- goto out;
-
- if (!warned) {
- btrfs_warn(fs_info,
- "Userspace transaction mechanism is considered "
- "deprecated and slated to be removed in 4.17. "
- "If you have a valid use case please "
- "speak up on the mailing list");
- WARN_ON(1);
- warned = true;
- }
-
- ret = -EINPROGRESS;
- private = file->private_data;
- if (private && private->trans)
- goto out;
- if (!private) {
- private = kzalloc(sizeof(struct btrfs_file_private),
- GFP_KERNEL);
- if (!private)
- return -ENOMEM;
- file->private_data = private;
- }
-
- ret = -EROFS;
- if (btrfs_root_readonly(root))
- goto out;
-
- ret = mnt_want_write_file(file);
- if (ret)
- goto out;
-
- atomic_inc(&fs_info->open_ioctl_trans);
-
- ret = -ENOMEM;
- trans = btrfs_start_ioctl_transaction(root);
- if (IS_ERR(trans))
- goto out_drop;
-
- private->trans = trans;
- return 0;
-
-out_drop:
- atomic_dec(&fs_info->open_ioctl_trans);
- mnt_drop_write_file(file);
-out:
- return ret;
-}
-
static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
{
struct inode *inode = file_inode(file);
@@ -4243,30 +4176,6 @@ static long btrfs_ioctl_space_info(struct btrfs_fs_info
*fs_info,
return ret;
}
-/*
- * there are many ways the trans_start and trans_end ioctls can lead
- * to deadlocks. They should only be used by applications that
- * basically own the machine, and have a very in depth understanding
- * of all the possible deadlocks and enospc problems.
- */
-long btrfs_ioctl_trans_end(struct file *file)
-{
- struct inode *inode = file_inode(file);
- struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_file_private *private = file->private_data;
-
- if (!private || !private->trans)
- return -EINVAL;
-
- btrfs_end_transaction(private->trans);
- private->trans = NULL;
-
- atomic_dec(&root->fs_info->open_ioctl_trans);
-
- mnt_drop_write_file(file);
- return 0;
-}
-
static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root,
void __user *argp)
{
@@ -5573,10 +5482,6 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_dev_info(fs_info, argp);
case BTRFS_IOC_BALANCE:
return btrfs_ioctl_balance(file, NULL);
- case BTRFS_IOC_TRANS_START:
- return btrfs_ioctl_trans_start(file);
- case BTRFS_IOC_TRANS_END:
- return btrfs_ioctl_trans_end(file);
case BTRFS_IOC_TREE_SEARCH:
return btrfs_ioctl_tree_search(file, argp);
case BTRFS_IOC_TREE_SEARCH_V2:
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
