patches/wayland/0001-wayland-cursor-HACK-use-virtwl-ioctl-for-allocation.patch

From 780814273e8d8b1dc072bc8c4bb5981d2447a036 Mon Sep 17 00:00:00 2001
From: Stephen Barber <smbarber@chromium.org>
Date: Wed, 25 Oct 2017 16:19:56 -0700
Subject: [PATCH] HACK: use virtwl ioctl for allocation

---
 cursor/os-compatibility.c | 71 ++++++++++++-----------------------------------
 1 file changed, 17 insertions(+), 54 deletions(-)

diff --git a/cursor/os-compatibility.c b/cursor/os-compatibility.c
index d7d4b33..73101e7 100644
--- a/cursor/os-compatibility.c
+++ b/cursor/os-compatibility.c
@@ -25,17 +25,20 @@
 
 #define _GNU_SOURCE
 
+#include <sys/ioctl.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdint.h>
+
+#include <linux/virtwl.h>
 
 #include "config.h"
 #include "os-compatibility.h"
 
-#ifndef HAVE_MKOSTEMP
 static int
 set_cloexec_or_close(int fd)
 {
@@ -57,27 +60,6 @@ err:
 	close(fd);
 	return -1;
 }
-#endif
-
-static int
-create_tmpfile_cloexec(char *tmpname)
-{
-	int fd;
-
-#ifdef HAVE_MKOSTEMP
-	fd = mkostemp(tmpname, O_CLOEXEC);
-	if (fd >= 0)
-		unlink(tmpname);
-#else
-	fd = mkstemp(tmpname);
-	if (fd >= 0) {
-		fd = set_cloexec_or_close(fd);
-		unlink(tmpname);
-	}
-#endif
-
-	return fd;
-}
 
 /*
  * Create a new, unique, anonymous file of the given size, and
@@ -103,46 +85,27 @@ create_tmpfile_cloexec(char *tmpname)
 int
 os_create_anonymous_file(off_t size)
 {
-	static const char template[] = "/weston-shared-XXXXXX";
-	const char *path;
-	char *name;
+	struct virtwl_ioctl_new virtwl_ioctl_new = {
+		.type = VIRTWL_IOCTL_NEW_ALLOC,
+		.fd = -1,
+		.flags = 0,
+		.size = size
+	};
+	int wl_fd = -1;
 	int fd;
 	int ret;
 
-	path = getenv("XDG_RUNTIME_DIR");
-	if (!path) {
-		errno = ENOENT;
-		return -1;
-	}
-
-	name = malloc(strlen(path) + sizeof(template));
-	if (!name)
+	wl_fd = open("/dev/wl0", O_RDWR);
+	if (wl_fd < 0)
 		return -1;
 
-	strcpy(name, path);
-	strcat(name, template);
-
-	fd = create_tmpfile_cloexec(name);
+	ret = ioctl(wl_fd, VIRTWL_IOCTL_NEW, &virtwl_ioctl_new);
+	close(wl_fd);
 
-	free(name);
-
-	if (fd < 0)
+	if (ret)
 		return -1;
 
-#ifdef HAVE_POSIX_FALLOCATE
-	ret = posix_fallocate(fd, 0, size);
-	if (ret != 0) {
-		close(fd);
-		errno = ret;
-		return -1;
-	}
-#else
-	ret = ftruncate(fd, size);
-	if (ret < 0) {
-		close(fd);
-		return -1;
-	}
-#endif
+	fd = set_cloexec_or_close(virtwl_ioctl_new.fd);
 
 	return fd;
 }
-- 
2.15.0.rc2.357.g7e34df9404-goog