@@ -1433,6 +1433,7 @@ void skb_prepare_seq_read(struct sk_buff *skb, unsigned int from,
unsigned int skb_seq_read(unsigned int consumed, const u8 **data,
struct skb_seq_state *st);
void skb_abort_seq_read(struct skb_seq_state *st);
+int skb_copy_seq_read(struct skb_seq_state *st, int offset, void *to, int len);
unsigned int skb_find_text(struct sk_buff *skb, unsigned int from,
unsigned int to, struct ts_config *config);
@@ -4409,6 +4409,41 @@ void skb_abort_seq_read(struct skb_seq_state *st)
}
EXPORT_SYMBOL(skb_abort_seq_read);
+/**
+ * skb_copy_seq_read() - copy from a skb_seq_state to a buffer
+ * @st: source skb_seq_state
+ * @offset: offset in source
+ * @to: destination buffer
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @offset bytes into the source @st to the destination
+ * buffer @to. `offset` should increase (or be unchanged) with each subsequent
+ * call to this function. If offset needs to decrease from the previous use `st`
+ * should be reset first.
+ *
+ * Return: 0 on success or a negative error code on failure
+ */
+int skb_copy_seq_read(struct skb_seq_state *st, int offset, void *to, int len)
+{
+ const u8 *data;
+ u32 sqlen;
+
+ for (;;) {
+ sqlen = skb_seq_read(offset, &data, st);
+ if (sqlen == 0)
+ return -ENOMEM;
+ if (sqlen >= len) {
+ memcpy(to, data, len);
+ return 0;
+ }
+ memcpy(to, data, sqlen);
+ to += sqlen;
+ offset += sqlen;
+ len -= sqlen;
+ }
+}
+EXPORT_SYMBOL(skb_copy_seq_read);
+
#define TS_SKB_CB(state) ((struct skb_seq_state *) &((state)->cb))
static unsigned int skb_ts_get_next_block(unsigned int offset, const u8 **text,