diff options
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 3735fad5616e..8c5197fe55a4 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1051,8 +1051,8 @@ EXPORT_SYMBOL(__pskb_copy); * @ntail: room to add at tail * @gfp_mask: allocation priority * - * Expands (or creates identical copy, if &nhead and &ntail are zero) - * header of skb. &sk_buff itself is not changed. &sk_buff MUST have + * Expands (or creates identical copy, if @nhead and @ntail are zero) + * header of @skb. &sk_buff itself is not changed. &sk_buff MUST have * reference count of 1. Returns zero in the case of success or error, * if expansion failed. In the last case, &sk_buff is not changed. * @@ -1264,6 +1264,29 @@ free_skb: EXPORT_SYMBOL(skb_pad); /** + * pskb_put - add data to the tail of a potentially fragmented buffer + * @skb: start of the buffer to use + * @tail: tail fragment of the buffer to use + * @len: amount of data to add + * + * This function extends the used data area of the potentially + * fragmented buffer. @tail must be the last fragment of @skb -- or + * @skb itself. If this would exceed the total buffer size the kernel + * will panic. A pointer to the first byte of the extra data is + * returned. + */ + +unsigned char *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len) +{ + if (tail != skb) { + skb->data_len += len; + skb->len += len; + } + return skb_put(tail, len); +} +EXPORT_SYMBOL_GPL(pskb_put); + +/** * skb_put - add data to a buffer * @skb: buffer to use * @len: amount of data to add @@ -2540,14 +2563,14 @@ EXPORT_SYMBOL(skb_prepare_seq_read); * @data: destination pointer for data to be returned * @st: state variable * - * Reads a block of skb data at &consumed relative to the + * Reads a block of skb data at @consumed relative to the * lower offset specified to skb_prepare_seq_read(). Assigns - * the head of the data block to &data and returns the length + * the head of the data block to @data and returns the length * of the block or 0 if the end of the skb data or the upper * offset has been reached. * * The caller is not required to consume all of the data - * returned, i.e. &consumed is typically set to the number + * returned, i.e. @consumed is typically set to the number * of bytes already consumed and the next call to * skb_seq_read() will return the remaining part of the block. * |