s3-vfs: async pwrite

Signed-off-by: Jeremy Allison <jra@samba.org>

1 files changed, 65 insertions, 0 deletions

diff --git a/source3/smbd/vfs.c b/source3/smbd/vfs.c
index 32e3472efe8..9b666e0bf62 100644
--- a/source3/smbd/vfs.c
+++ b/source3/smbd/vfs.c
@@ -30,6 +30,7 @@
 #include "memcache.h"
 #include "transfer_file.h"
 #include "ntioctl.h"
+#include "lib/util/tevent_unix.h"
 
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_VFS
@@ -1556,6 +1557,70 @@ ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
 	return handle->fns->pwrite_fn(handle, fsp, data, n, offset);
 }
 
+struct smb_vfs_call_pwrite_state {
+	ssize_t (*recv_fn)(struct tevent_req *req, int *err);
+	ssize_t retval;
+};
+
+static void smb_vfs_call_pwrite_done(struct tevent_req *subreq);
+
+struct tevent_req *smb_vfs_call_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 smb_vfs_call_pwrite_state *state;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct smb_vfs_call_pwrite_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	VFS_FIND(pwrite_send);
+	state->recv_fn = handle->fns->pwrite_recv_fn;
+
+	subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n,
+					     offset);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req);
+	return req;
+}
+
+static void smb_vfs_call_pwrite_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct smb_vfs_call_pwrite_state *state = tevent_req_data(
+		req, struct smb_vfs_call_pwrite_state);
+	int err;
+
+	state->retval = state->recv_fn(subreq, &err);
+	TALLOC_FREE(subreq);
+	if (state->retval == -1) {
+		tevent_req_error(req, err);
+		return;
+	}
+	tevent_req_done(req);
+}
+
+ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, int *perrno)
+{
+	struct smb_vfs_call_pwrite_state *state = tevent_req_data(
+		req, struct smb_vfs_call_pwrite_state);
+	int err;
+
+	if (tevent_req_is_unix_error(req, &err)) {
+		*perrno = err;
+		return -1;
+	}
+	return state->retval;
+}
+
 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
 			     struct files_struct *fsp, off_t offset,
 			     int whence)