author: Hans de Goede <hdegoede@redhat.com> 2021-01-21 12:54:18 +0100
committer: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2021-07-25 14:37:35 +0200
commit: 6f6f8f894a55a2bc7a618290494030c09dd97c92
parent: 53c4f60ed9dd5ca270bc00c7986498b52cbdb4d5
Commit Summary:
Diffstat:
1 file changed, 41 insertions, 0 deletions
diff --git a/fs/vboxsf/dir.c b/fs/vboxsf/dir.c
index 87d5b2fef592..c4769a9396c5 100644
--- a/fs/vboxsf/dir.c
+++ b/fs/vboxsf/dir.c
@@ -308,6 +308,53 @@ static int vboxsf_dir_mkdir(struct user_namespace *mnt_userns,
return vboxsf_dir_create(parent, dentry, mode, true, true, NULL);
}
+static int vboxsf_dir_atomic_open(struct inode *parent, struct dentry *dentry,
+ struct file *file, unsigned int flags, umode_t mode)
+{
+ struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
+ struct vboxsf_handle *sf_handle;
+ struct dentry *res = NULL;
+ u64 handle;
+ int err;
+
+ if (d_in_lookup(dentry)) {
+ res = vboxsf_dir_lookup(parent, dentry, 0);
+ if (IS_ERR(res))
+ return PTR_ERR(res);
+
+ if (res)
+ dentry = res;
+ }
+
+ /* Only creates */
+ if (!(flags & O_CREAT) || d_really_is_positive(dentry))
+ return finish_no_open(file, res);
+
+ err = vboxsf_dir_create(parent, dentry, mode, false, flags & O_EXCL, &handle);
+ if (err)
+ goto out;
+
+ sf_handle = vboxsf_create_sf_handle(d_inode(dentry), handle, SHFL_CF_ACCESS_READWRITE);
+ if (IS_ERR(sf_handle)) {
+ vboxsf_close(sbi->root, handle);
+ err = PTR_ERR(sf_handle);
+ goto out;
+ }
+
+ err = finish_open(file, dentry, generic_file_open);
+ if (err) {
+ /* This also closes the handle passed to vboxsf_create_sf_handle() */
+ vboxsf_release_sf_handle(d_inode(dentry), sf_handle);
+ goto out;
+ }
+
+ file->private_data = sf_handle;
+ file->f_mode |= FMODE_CREATED;
+out:
+ dput(res);
+ return err;
+}
+
static int vboxsf_dir_unlink(struct inode *parent, struct dentry *dentry)
{
struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
@@ -428,6 +475,7 @@ const struct inode_operations vboxsf_dir_iops = {
.lookup = vboxsf_dir_lookup,
.create = vboxsf_dir_mkfile,
.mkdir = vboxsf_dir_mkdir,
+ .atomic_open = vboxsf_dir_atomic_open,
.rmdir = vboxsf_dir_unlink,
.unlink = vboxsf_dir_unlink,
.rename = vboxsf_dir_rename,