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bloblist: Add a new function to add or check size

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A common check is to see if a blob is present, create it if not and make
sure that the size is large enough. Add a function to handle this.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2020-01-27 08:49:50 -07:00
parent 9ff5e0495d
commit 5b044548f5
3 changed files with 65 additions and 1 deletions
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19
common/bloblist.c
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@@ -85,8 +85,10 @@ static int bloblist_ensurerec(uint tag, struct bloblist_rec **recp, int size)
rec = bloblist_findrec(tag);
if (rec) {
if (size && size != rec->size)
if (size && size != rec->size) {
*recp = rec;
return -ESPIPE;
}
} else {
int ret;
@@ -145,6 +147,21 @@ void *bloblist_ensure(uint tag, int size)
return (void *)rec + rec->hdr_size;
}
int bloblist_ensure_size_ret(uint tag, int *sizep, void **blobp)
{
struct bloblist_rec *rec;
int ret;
ret = bloblist_ensurerec(tag, &rec, *sizep);
if (ret == -ESPIPE)
*sizep = rec->size;
else if (ret)
return ret;
*blobp = (void *)rec + rec->hdr_size;
return 0;
}
static u32 bloblist_calc_chksum(struct bloblist_hdr *hdr)
{
struct bloblist_rec *rec;