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init: move initial property area allocation into bionic

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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.

Change-Id: If9917d5f775c1a82eb89be55b84635395145ca49
Signed-off-by: Greg Hackmann <ghackmann@google.com>
This commit is contained in:
Greg Hackmann 2013-02-12 14:39:31 -08:00
parent 389e358017
commit f14eef0c3c
1 changed files with 5 additions and 28 deletions
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33
init/property_service.c
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@ -112,7 +112,6 @@ struct {
};
typedef struct {
void *data;
size_t size;
int fd;
} workspace;
@ -120,36 +119,13 @@ typedef struct {
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;
@ -159,13 +135,14 @@ static int init_property_area(void)
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;
}