s3-vfs: Add pwrite_send/recv to vfs modules
[kai/samba.git] / examples / VFS / skel_transparent.c
index 55149d7fd87f72b09a4fb8e7241c717341a2b983..819f7b9c085c33ae4ae6dfe32b9e842c42471068 100644 (file)
@@ -257,6 +257,60 @@ static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp, const v
        return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 }
 
+struct skel_pwrite_state {
+       ssize_t ret;
+       int err;
+};
+
+static void skel_pwrite_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
+                                          TALLOC_CTX *mem_ctx,
+                                          struct tevent_context *ev,
+                                          struct files_struct *fsp,
+                                          const void *data,
+                                          size_t n, off_t offset)
+{
+       struct tevent_req *req, *subreq;
+       struct skel_pwrite_state *state;
+
+       req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
+       if (req == NULL) {
+               return NULL;
+       }
+       subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
+                                        n, offset);
+       if (tevent_req_nomem(subreq, req)) {
+               return tevent_req_post(req, ev);
+       }
+       tevent_req_set_callback(subreq, skel_pwrite_done, req);
+       return req;
+}
+
+static void skel_pwrite_done(struct tevent_req *subreq)
+{
+       struct tevent_req *req = tevent_req_callback_data(
+               subreq, struct tevent_req);
+       struct skel_pwrite_state *state = tevent_req_data(
+               req, struct skel_pwrite_state);
+
+       state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->err);
+       TALLOC_FREE(subreq);
+       tevent_req_done(req);
+}
+
+static ssize_t skel_pwrite_recv(struct tevent_req *req, int *err)
+{
+       struct skel_pwrite_state *state = tevent_req_data(
+               req, struct skel_pwrite_state);
+
+       if (tevent_req_is_unix_error(req, err)) {
+               return -1;
+       }
+       *err = state->err;
+       return state->ret;
+}
+
 static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp, off_t offset, int whence)
 {
        return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
@@ -823,6 +877,8 @@ struct vfs_fn_pointers skel_transparent_fns = {
        .pread_recv_fn = skel_pread_recv,
        .write_fn = skel_write,
        .pwrite_fn = skel_pwrite,
+       .pwrite_send_fn = skel_pwrite_send,
+       .pwrite_recv_fn = skel_pwrite_recv,
        .lseek_fn = skel_lseek,
        .sendfile_fn = skel_sendfile,
        .recvfile_fn = skel_recvfile,