-unsigned int
-uisutil_copy_fragsinfo_from_skb(unsigned char *calling_ctx, void *skb_in,
- unsigned int firstfraglen,
- unsigned int frags_max,
- struct phys_info frags[])
-{
- unsigned int count = 0, ii, size, offset = 0, numfrags;
- struct sk_buff *skb = skb_in;
-
- numfrags = skb_shinfo(skb)->nr_frags;
-
- while (firstfraglen) {
- if (count == frags_max) {
- LOGERR("%s frags array too small: max:%d count:%d\n",
- calling_ctx, frags_max, count);
- return -1; /* failure */
- }
- frags[count].pi_pfn =
- page_to_pfn(virt_to_page(skb->data + offset));
- frags[count].pi_off =
- (unsigned long)(skb->data + offset) & PI_PAGE_MASK;
- size =
- min(firstfraglen,
- (unsigned int)(PI_PAGE_SIZE - frags[count].pi_off));
- /* can take smallest of firstfraglen(what's left) OR
- * bytes left in the page
- */
- frags[count].pi_len = size;
- firstfraglen -= size;
- offset += size;
- count++;
- }
- if (!numfrags)
- goto dolist;
-
- if ((count + numfrags) > frags_max) {
- LOGERR("**** FAILED %s frags array too small: max:%d count+nr_frags:%d\n",
- calling_ctx, frags_max, count + numfrags);
- return -1; /* failure */
- }
-
- for (ii = 0; ii < numfrags; ii++) {
- count = add_physinfo_entries(page_to_pfn(
- skb_frag_page(&skb_shinfo(skb)->frags[ii])),
- skb_shinfo(skb)->frags[ii].
- page_offset,
- skb_shinfo(skb)->frags[ii].
- size, count, frags_max,
- frags);
- if (count == 0) {
- LOGERR("**** FAILED to add physinfo entries\n");
- return -1; /* failure */
- }
- }
-
-dolist: if (skb_shinfo(skb)->frag_list) {
- struct sk_buff *skbinlist;
- int c;
-
- for (skbinlist = skb_shinfo(skb)->frag_list; skbinlist;
- skbinlist = skbinlist->next) {
- c = uisutil_copy_fragsinfo_from_skb("recursive",
- skbinlist,
- skbinlist->len - skbinlist->data_len,
- frags_max - count,
- &frags[count]);
- if (c == -1) {
- LOGERR("**** FAILED recursive call failed\n");
- return -1;
- }
- count += c;
- }
- }
- return count;
-}
-EXPORT_SYMBOL_GPL(uisutil_copy_fragsinfo_from_skb);