SKB_FRAG_REF(9) Linux Networking SKB_FRAG_REF(9)NAME
skb_frag_ref - take an addition reference on a paged fragment of an skb.
SYNOPSIS
void skb_frag_ref(struct sk_buff * skb, int f);
ARGUMENTS
skb
the buffer
f
the fragment offset.
DESCRIPTION
Takes an additional reference on the f'th paged fragment of skb.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SKB_FRAG_REF(9)
Check Out this Related Man Page
__SKB_RECV_DATAGRAM(9) Linux Networking __SKB_RECV_DATAGRAM(9)NAME
__skb_recv_datagram - Receive a datagram skbuff
SYNOPSIS
struct sk_buff * __skb_recv_datagram(struct sock * sk, unsigned int flags, int * peeked, int * off, int * err);
ARGUMENTS
sk
socket
flags
MSG_ flags
peeked
returns non-zero if this packet has been seen before
off
an offset in bytes to peek skb from. Returns an offset within an skb where data actually starts
err
error code returned
DESCRIPTION
Get a datagram skbuff, understands the peeking, nonblocking wakeups and possible races. This replaces identical code in packet, raw and
udp, as well as the IPX AX.25 and Appletalk. It also finally fixes the long standing peek and read race for datagram sockets. If you alter
this routine remember it must be re-entrant.
This function will lock the socket if a skb is returned, so the caller needs to unlock the socket in that case (usually by calling
skb_free_datagram)
* It does not lock socket since today. This function is * free of race conditions. This measure should/can improve * significantly datagram
socket latencies at high loads, * when data copying to user space takes lots of time. * (BTW I've just killed the last cli in
IP/IPv6/core/netlink/packet * 8) Great win.) * --ANK (980729)
The order of the tests when we find no data waiting are specified quite explicitly by POSIX 1003.1g, don't change them without having the
standard around please.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 __SKB_RECV_DATAGRAM(9)
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