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Date: Tue, 21 Feb 2012 18:45:50 +0100 From: Eric Dumazet <eric.dumazet@...il.com> To: Pavel Emelyanov <xemul@...allels.com> Cc: David Miller <davem@...emloft.net>, Linux Netdev List <netdev@...r.kernel.org> Subject: Re: [PATCH 4/6] sock: Introduce the SO_PEEK_OFF sock option Le mardi 21 février 2012 à 21:31 +0400, Pavel Emelyanov a écrit : > This one specifies where to start MSG_PEEK-ing queue data from. When > set to negative value means that MSG_PEEK works as ususally -- peeks > from the head of the queue always. > > When some bytes are peeked from queue and the peeking offset is non > negative it is moved forward so that the next peek will return next > portion of data. > > When non-peeking recvmsg occurs and the peeking offset is non negative > is is moved backward so that the next peek will still peek the proper > data (i.e. the one that would have been picked if there were no non > peeking recv in between). > > The offset is set using per-proto opteration to let the protocol handle > the locking issues and to check whether the peeking offset feature is > supported by the protocol the socket belongs to. > > Signed-off-by: Pavel Emelyanov <xemul@...allels.com> > > --- > include/asm-generic/socket.h | 1 + > include/linux/net.h | 1 + > include/net/sock.h | 25 +++++++++++++++++++++++++ > net/core/sock.c | 13 +++++++++++++ > 4 files changed, 40 insertions(+), 0 deletions(-) > > diff --git a/include/asm-generic/socket.h b/include/asm-generic/socket.h > index 49c1704..832c270 100644 > --- a/include/asm-generic/socket.h > +++ b/include/asm-generic/socket.h > @@ -66,5 +66,6 @@ > #define SO_RXQ_OVFL 40 > > #define SO_WIFI_STATUS 41 > +#define SO_PEEK_OFF 42 > #define SCM_WIFI_STATUS SO_WIFI_STATUS small note : should be moved down by one line, after SCM_WIFI_STATUS Other than that, -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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