init: move initial property area allocation into bionic
bionic's __system_property_add() now expands the property area as needed
by mapping in more pages. Rather than duplicate the mapping code, move
it inside bionic and have bionic's __system_property_area_init() set up
the first page.
Signed-off-by: Greg Hackmann <ghackmann@google.com>
(cherry picked from commit f14eef0c3c456bfe39f7e9d57c8f7ae4ec775972)
Change-Id: Ieb94caab1527c71f2155efe3795490b0ea215a29
diff --git a/init/property_service.c b/init/property_service.c
index c682809..70ee4a6 100755
--- a/init/property_service.c
+++ b/init/property_service.c
@@ -110,7 +110,6 @@
};
typedef struct {
- void *data;
size_t size;
int fd;
} workspace;
@@ -118,36 +117,13 @@
static int init_workspace(workspace *w, size_t size)
{
void *data;
- int fd;
-
- /* dev is a tmpfs that we can use to carve a shared workspace
- * out of, so let's do that...
- */
- fd = open(PROP_FILENAME, O_RDWR | O_CREAT | O_NOFOLLOW, 0644);
+ int fd = open(PROP_FILENAME, O_RDONLY | O_NOFOLLOW);
if (fd < 0)
return -1;
- if (ftruncate(fd, size) < 0)
- goto out;
-
- data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
- if(data == MAP_FAILED)
- goto out;
-
- close(fd);
-
- fd = open(PROP_FILENAME, O_RDONLY | O_NOFOLLOW);
- if (fd < 0)
- return -1;
-
- w->data = data;
w->size = size;
w->fd = fd;
return 0;
-
-out:
- close(fd);
- return -1;
}
static workspace pa_workspace;
@@ -157,13 +133,14 @@
if (property_area_inited)
return -1;
- if(init_workspace(&pa_workspace, PA_SIZE))
+ if(__system_property_area_init())
+ return -1;
+
+ if(init_workspace(&pa_workspace, 0))
return -1;
fcntl(pa_workspace.fd, F_SETFD, FD_CLOEXEC);
- __system_property_area_init(pa_workspace.data);
-
property_area_inited = 1;
return 0;
}