linux.git/net/sctp/socket.c, branch v2.6.17

[SCTP]: Allow linger to abort 1-N style sockets.

2006-05-19T21:32:06+00:00

Enable SO_LINGER functionality for 1-N style sockets. The socket API
draft will be clarfied to allow for this functionality. The linger
settings will apply to all associations on a given socket.

Signed-off-by: Vladislav Yasevich 
Signed-off-by: Sridhar Samudrala

[SCTP]: A better solution to fix the race between sctp_peeloff() and

2006-05-19T18:01:18+00:00

sctp_rcv().

The goal is to hold the ref on the association/endpoint throughout the
state-machine process.  We accomplish like this:

  /* ref on the assoc/ep is taken during lookup */

  if owned_by_user(sk)
 	sctp_add_backlog(skb, sk);
  else
 	inqueue_push(skb, sk);

  /* drop the ref on the assoc/ep */

However, in sctp_add_backlog() we take the ref on assoc/ep and hold it
while the skb is on the backlog queue.  This allows us to get rid of the
sock_hold/sock_put in the lookup routines.

Now sctp_backlog_rcv() needs to account for potential association move.
In the unlikely event that association moved, we need to retest if the
new socket is locked by user.  If we don't this, we may have two packets
racing up the stack toward the same socket and we can't deal with it.
If the new socket is still locked, we'll just add the skb to its backlog
continuing to hold the ref on the association.  This get's rid of the
need to move packets from one backlog to another and it also safe in
case new packets arrive on the same backlog queue.

The last step, is to lock the new socket when we are moving the
association to it.  This is needed in case any new packets arrive on
the association when it moved.  We want these to go to the backlog since
we would like to avoid the race between this new packet and a packet
that may be sitting on the backlog queue of the old socket toward the
same association.

Signed-off-by: Vladislav Yasevich 
Signed-off-by: Sridhar Samudrala

[SCTP]: Set sk_err so that poll wakes up after a non-blocking connect failure.

2006-05-19T17:58:12+00:00

Also fix some other cases where sk_err is not set for 1-1 style sockets.

Signed-off-by: Sridhar Samudrala

[PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications

2006-03-25T16:22:56+00:00

Implement the half-closed devices notifiation, by adding a new POLLRDHUP
(and its alias EPOLLRDHUP) bit to the existing poll/select sets.  Since the
existing POLLHUP handling, that does not report correctly half-closed
devices, was feared to be changed, this implementation leaves the current
POLLHUP reporting unchanged and simply add a new bit that is set in the few
places where it makes sense.  The same thing was discussed and conceptually
agreed quite some time ago:

http://lkml.org/lkml/2003/7/12/116

Since this new event bit is added to the existing Linux poll infrastruture,
even the existing poll/select system calls will be able to use it.  As far
as the existing POLLHUP handling, the patch leaves it as is.  The
pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing
archs and sets the bit in the six relevant files.  The other attached diff
is the simple change required to sys/epoll.h to add the EPOLLRDHUP
definition.

There is "a stupid program" to test POLLRDHUP delivery here:

 http://www.xmailserver.org/pollrdhup-test.c

It tests poll(2), but since the delivery is same epoll(2) will work equally.

Signed-off-by: Davide Libenzi 
Cc: "David S. Miller" 
Cc: Michael Kerrisk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[SCTP]: correct the number of INIT retransmissions

2006-01-30T23:59:54+00:00

We currently count the initial INIT/COOKIE_ECHO chunk toward the
retransmit count and thus sends a total of sctp_max_retrans_init chunks.
The correct behavior is to retransmit the chunk sctp_max_retrans_init in
addition to sending the original.

Signed-off-by: Vlad Yasevich 
Signed-off-by: Sridhar Samudrala 
Signed-off-by: David S. Miller

[SCTP]: Fix couple of races between sctp_peeloff() and sctp_rcv().

2006-01-17T19:56:26+00:00

Validate and update the sk in sctp_rcv() to avoid the race where an
assoc/ep could move to a different socket after we get the sk, but before
the skb is added to the backlog.

Also migrate the skb's in backlog queue to new sk when doing a peeloff.

Signed-off-by: Sridhar Samudrala

[SCTP]: Fix bad sysctl formatting of SCTP timeout values on 64-bit m/cs.

2006-01-17T19:55:17+00:00

Change all the structure members that hold jiffies to be of type
unsigned long.  This also corrects bad sysctl formating on 64 bit
architectures.

Signed-off-by: Vlad Yasevich 
Signed-off-by: Sridhar Samudrala

[PATCH] capable/capability.h (net/)

2006-01-12T02:42:14+00:00

net: Use  where capable() is used.

Signed-off-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[NET]: Remove more unneeded typecasts on *malloc()

2006-01-12T00:32:14+00:00

This removes more unneeded casts on the return value for kmalloc(),
sock_kmalloc(), and vmalloc().

Signed-off-by: Kris Katterjohn 
Acked-by: James Morris 
Signed-off-by: David S. Miller

[SCTP]: Add support for SCTP_DELAYED_ACK_TIME socket option.

2006-01-03T21:11:13+00:00

Signed-off-by: Frank Filz 
Signed-off-by: Sridhar Samudrala 
Signed-off-by: David S. Miller