vboxsf: Make vboxsf_dir_create() return the handle for the created file

Make vboxsf_dir_create() optionally return the vboxsf-handle for
the created file. This is a preparation patch for adding atomic_open
support.

Fixes: 0fd169576648 ("fs: Add VirtualBox guest shared folder (vboxsf) support")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/fs/vboxsf/dir.c b/fs/vboxsf/dir.c
index 6ff84343edcad19db96b9e5ecf6183bc8b05932b..87d5b2fef592bbb128373dd63fc7ed5e0b2ad821 100644 (file)
--- a/fs/vboxsf/dir.c
+++ b/fs/vboxsf/dir.c
@@ -253,7 +253,7 @@ static int vboxsf_dir_instantiate(struct inode *parent, struct dentry *dentry,
 }
 
 static int vboxsf_dir_create(struct inode *parent, struct dentry *dentry,
-                            umode_t mode, bool is_dir, bool excl)
+                            umode_t mode, bool is_dir, bool excl, u64 *handle_ret)
 {
        struct vboxsf_inode *sf_parent_i = VBOXSF_I(parent);
        struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
@@ -278,30 +278,34 @@ static int vboxsf_dir_create(struct inode *parent, struct dentry *dentry,
        if (params.result != SHFL_FILE_CREATED)
                return -EPERM;
 
-       vboxsf_close(sbi->root, params.handle);
-
        err = vboxsf_dir_instantiate(parent, dentry, &params.info);
        if (err)
-               return err;
+               goto out;
 
        /* parent directory access/change time changed */
        sf_parent_i->force_restat = 1;
 
-       return 0;
+out:
+       if (err == 0 && handle_ret)
+               *handle_ret = params.handle;
+       else
+               vboxsf_close(sbi->root, params.handle);
+
+       return err;
 }
 
 static int vboxsf_dir_mkfile(struct user_namespace *mnt_userns,
                             struct inode *parent, struct dentry *dentry,
                             umode_t mode, bool excl)
 {
-       return vboxsf_dir_create(parent, dentry, mode, false, excl);
+       return vboxsf_dir_create(parent, dentry, mode, false, excl, NULL);
 }
 
 static int vboxsf_dir_mkdir(struct user_namespace *mnt_userns,
                            struct inode *parent, struct dentry *dentry,
                            umode_t mode)
 {
-       return vboxsf_dir_create(parent, dentry, mode, true, true);
+       return vboxsf_dir_create(parent, dentry, mode, true, true, NULL);
 }
 
 static int vboxsf_dir_unlink(struct inode *parent, struct dentry *dentry)