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bloblist: Zero records when adding 

It is convenient for bloblist to zero out the contents of a records when
it is added. This saves the callers having to do it.

Update the API accordingly.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-01-27 08:49:52 -07:00
parent 02247c1887
commit b83994dec7
3 changed files with 30 additions and 4 deletions
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3
common/bloblist.c
View File

@ -73,6 +73,9 @@ static int bloblist_addrec(uint tag, int size, struct bloblist_rec **recp)
rec->hdr_size = sizeof(*rec);
rec->size = size;
rec->spare = 0;
/* Zero the record data */
memset(rec + 1, '\0', rec->size);
*recp = rec;
return 0;

4
doc/README.bloblist
View File

@ -55,8 +55,8 @@ a single bloblist.
API
---
Bloblist provides a fairly simple API which allows blobs to be created and
found. All access is via the blob's tag.
Bloblist provides a fairly simple API which allows blobs to be created and
found. All access is via the blob's tag. Blob records are zeroed when added.
Finishing the bloblist

27
test/bloblist.c
View File

@ -34,13 +34,31 @@ static struct bloblist_hdr *clear_bloblist(void)
{
struct bloblist_hdr *hdr;
/* Clear out any existing bloblist so we have a clean slate */
/*
* Clear out any existing bloblist so we have a clean slate. Zero the
* header so that existing records are removed, but set everything else
* to 0xff for testing purposes.
*/
hdr = map_sysmem(CONFIG_BLOBLIST_ADDR, TEST_BLOBLIST_SIZE);
memset(hdr, '\0', TEST_BLOBLIST_SIZE);
memset(hdr, '\xff', TEST_BLOBLIST_SIZE);
memset(hdr, '\0', sizeof(*hdr));
return hdr;
}
static int check_zero(void *data, int size)
{
u8 *ptr;
int i;
for (ptr = data, i = 0; i < size; i++, ptr++) {
if (*ptr)
return -EINVAL;
}
return 0;
}
static int bloblist_test_init(struct unit_test_state *uts)
{
struct bloblist_hdr *hdr;
@ -84,10 +102,14 @@ static int bloblist_test_blob(struct unit_test_state *uts)
data = bloblist_find(TEST_TAG, TEST_SIZE);
ut_asserteq_ptr(rec + 1, data);
/* Check the data is zeroed */
ut_assertok(check_zero(data, TEST_SIZE));
/* Check the 'ensure' method */
ut_asserteq_ptr(data, bloblist_ensure(TEST_TAG, TEST_SIZE));
ut_assertnull(bloblist_ensure(TEST_TAG, TEST_SIZE2));
rec2 = (struct bloblist_rec *)(data + ALIGN(TEST_SIZE, BLOBLIST_ALIGN));
ut_assertok(check_zero(data, TEST_SIZE));
/* Check for a non-existent record */
ut_asserteq_ptr(data, bloblist_ensure(TEST_TAG, TEST_SIZE));
@ -112,6 +134,7 @@ static int bloblist_test_blob_ensure(struct unit_test_state *uts)
size = TEST_SIZE;
ut_assertok(bloblist_ensure_size_ret(TEST_TAG, &size, &data));
ut_asserteq(TEST_SIZE, size);
ut_assertok(check_zero(data, TEST_SIZE));
/* Check that we get the same thing again */
ut_assertok(bloblist_ensure_size_ret(TEST_TAG, &size, &data2));