pipes: Use pde as a reference in pipe_data_rst

Need it for PB transition.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/pipes.h

@@ -21,7 +21,7 @@ struct pipe_data_dump {
 extern int dump_one_pipe_data(struct pipe_data_dump *pd, int lfd, const struct fd_parms *p);
 
 struct pipe_data_rst {
-	struct pipe_data_entry	pde;
+	struct pipe_data_entry	*pde;
 	struct pipe_data_rst	*next;
 };
 

pipes.c

@@ -53,21 +53,24 @@ int collect_pipe_data(int img_type, struct pipe_data_rst **hash)
 		r = xmalloc(sizeof(*r));
 		if (!r)
 			break;
+		r->pde = xmalloc(sizeof(*r->pde));
+		if (!r->pde)
+			break;
 
-		ret = read_img_eof(fd, &r->pde);
+		ret = read_img_eof(fd, r->pde);
 		if (ret <= 0)
 			break;
 
-		off = r->pde.off + lseek(fd, 0, SEEK_CUR);
-		lseek(fd, r->pde.bytes + r->pde.off, SEEK_CUR);
-		r->pde.off = off;
+		off = r->pde->off + lseek(fd, 0, SEEK_CUR);
+		lseek(fd, r->pde->bytes + r->pde->off, SEEK_CUR);
+		r->pde->off = off;
 
-		ret = r->pde.pipe_id & PIPE_DATA_HASH_MASK;
+		ret = r->pde->pipe_id & PIPE_DATA_HASH_MASK;
 		r->next = hash[ret];
 		hash[ret] = r;
 
 		pr_info("Collected pipe data for %#x (chain %u)\n",
-				r->pde.pipe_id, ret);
+				r->pde->pipe_id, ret);
 	}
 
 	close(fd);
@@ -128,7 +131,7 @@ int restore_pipe_data(int img_type, int pfd, u32 id, struct pipe_data_rst **hash
 	struct pipe_data_rst *pd;
 
 	for (pd = hash[id & PIPE_DATA_HASH_MASK]; pd != NULL; pd = pd->next)
-		if (pd->pde.pipe_id == id)
+		if (pd->pde->pipe_id == id)
 			break;
 
 	if (!pd) { /* no data for this pipe */
@@ -140,11 +143,11 @@ int restore_pipe_data(int img_type, int pfd, u32 id, struct pipe_data_rst **hash
 	if (img < 0)
 		return -1;
 
-	pr_info("\t\tSplicing data size=%u off=%u\n", pd->pde.bytes, pd->pde.off);
-	lseek(img, pd->pde.off, SEEK_SET);
+	pr_info("\t\tSplicing data size=%u off=%u\n", pd->pde->bytes, pd->pde->off);
+	lseek(img, pd->pde->off, SEEK_SET);
 
-	while (size != pd->pde.bytes) {
-		ret = splice(img, NULL, pfd, NULL, pd->pde.bytes - size, 0);
+	while (size != pd->pde->bytes) {
+		ret = splice(img, NULL, pfd, NULL, pd->pde->bytes - size, 0);
 		if (ret < 0) {
 			pr_perror("%#x: Error splicing data", id);
 			goto err;
@@ -152,7 +155,7 @@ int restore_pipe_data(int img_type, int pfd, u32 id, struct pipe_data_rst **hash
 
 		if (ret == 0) {
 			pr_err("%#x: Wanted to restore %d bytes, but got %d\n",
-			       id, pd->pde.bytes, size);
+			       id, pd->pde->bytes, size);
 			ret = -1;
 			goto err;
 		}