I'm trying to use the TCP_MAXSEG option to setsockopt() to set the MSS
for both sides of a bidirectional connection.

man tcp says: "If this option is set before connection establishment, it
also changes the MSS value announced to the other end in the initial
packet."

However, the kernel only uses the MTU/route cache to set the advertised
MSS. That means if I set the MSS to, say, 500 before calling connect(),
I will send at most 500-byte packets, but I will still receive 1500-byte
packets in reply.

This is a bug, either in the kernel or the documentation.

This patch (applies to latest net-2.6) reduces the advertised value to
that requested by the user as long as setsockopt() is called before
connect() or accept(). This seems like the behavior that one would
expect as well as that which is documented.

I've tried to make sure that things that depend on the advertised MSS
are set correctly.
Signed-off-by: NTom Quetchenbach <virtualphtn@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently dequeueing a packet and requeueing the same packet will cause a
different packet to be pulled on the next dequeue.  This change forces
requeue to rewind the current_band.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If lost skb is sacked, we might have nothing to retransmit
as high as the retransmit_high is pointing to, so place
it lower to avoid unnecessary walking.

This is mainly for the case where high L'ed skbs gets sacked.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Most importantly avoid doing it with cumulative ACK. However,
since we have lost_cnt_hint in the picture as well needing
adjustments, it's not as trivial as dealing with
retransmit_skb_hint (and cannot be done in the all place we
could trivially leave retransmit_skb_hint untouched).

With the previous patch, this should mostly remove O(n^2)
behavior while cumulative ACKs start flowing once rexmit
after a lossy round-trip made it through.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Most importantly avoid doing it with cumulative ACK. Not clearing
means that we no longer need n^2 processing in resolution of each
fast recovery.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This doesn't much sense here afaict, probably never has. Since
fragmenting and collapsing deal the hints by themselves, there
should be very little reason for the rexmit loop to do that.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Both loops are quite similar, so they can be combined
with little effort. As a result, forward_skb_hint becomes
obsolete as well.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The validity of the retransmit_high must then be ensured
if no L'ed skb exits!

This makes a minor change to behavior, we now have to
iterate the head to find out that the loop terminates.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Because lost counter no longer requires tuning, this is
trivial to remove (the tuning wouldn't have been too
hard either) because no "new" retransmittable skb appeared
below retransmit_skb_hint when SACKing for sure.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

I suspect it might have been related to the changed amount
of lost skbs, which was counted by retransmit_cnt_hint that
got changed.

The place for this clearing was very illogical anyway,
it should have been after the LOST-bit clearing loop to
make any sense.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Main benefit in this is that we can then freely point
the retransmit_skb_hint to anywhere we want to because
there's no longer need to know what would be the count
changes involve, and since this is really used only as a
terminator, unnecessary work is one time walk at most,
and if some retransmissions are necessary after that
point later on, the walk is not full waste of time
anyway.

Since retransmit_high must be kept valid, all lost
markers must ensure that.

Now I also have learned how those "holes" in the
rexmittable skbs can appear, mtu probe does them. So
I removed the misleading comment as well.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This useful because we'd need to verifying soon in many places
which makes things slightly more complex than it used to be.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Ie., the difference between partial and all clearing doesn't
exists anymore since the SACK optimizations got dropped by
an sacktag rewrite.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes the following build warning:

drivers/net/qlge/qlge_main.c:3897: warning: ‘qlge_resume’ defined but not used
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/qlge/qlge_dbg.c: In function ‘ql_dump_qdev’:
drivers/net/qlge/qlge_dbg.c:369: warning: cast to pointer from integer of different size
drivers/net/qlge/qlge_dbg.c:373: warning: cast to pointer from integer of different size
drivers/net/qlge/qlge_dbg.c: In function ‘ql_dump_tx_ring’:
drivers/net/qlge/qlge_dbg.c:457: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c:461: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c: In function ‘ql_dump_rx_ring’:
drivers/net/qlge/qlge_dbg.c:557: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c:565: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c:575: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c:579: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c:598: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
drivers/net/qlge/qlge_dbg.c:602: warning: format ‘%llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘long unsigned int’
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If UM is going to claim that it supports DMA by setting
HAS_DMA, it should provide a dma_mapping_error() implementation.

Based upon a report by Julius Volz.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NRémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The timer_interval field is only assigned once, and never reassigned.
We can safely replace all instances of the timer_interval with a
constant value.
Signed-off-by: NBenjamin Li <benli@broadcom.com>
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Acked-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The name of the board is only used during the initialization of
the adapter.  We can save the space of a pointer by not storing
this information.
Signed-off-by: NBenjamin Li <benli@broadcom.com>
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Acked-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NBenjamin Li <benli@broadcom.com>
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Acked-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

bnx2_set_mac_link() doesn't need to return any error codes.  And
all the callers don't check the return code. It is safe to
change the return type to a void.
Signed-off-by: NBenjamin Li <benli@broadcom.com>
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Acked-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Supporting JMC250, and JMC260.
Signed-off-by: NGuo-Fu Tseng <cooldavid@cooldavid.org>
Acked-and-tested-by: NEthan Hsiao <ethanhsiao@jmicron.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Signed-off-by: NScott Feldman <scofeldm@cisco.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Driver for Atheros L2 10/100 network device. Includes necessary
changes for Kconfig, Makefile, and pci_ids.h.
Signed-off-by: NChris Snook <csnook@redhat.com>
Signed-off-by: NJay Cliburn <jacliburn@bellsouth.net>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Change __contant_htons() to htons() in the IPVS code when not in an
initializer.

-Brian
Signed-off-by: NBrian Haley <brian.haley@hp.com>
Acked-by: NJulius Volz <juliusv@google.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>

This teaches sparse that the following are not problems:

make C=1
  CHECK   net/ipv4/ipvs/ip_vs_ctl.c
net/ipv4/ipvs/ip_vs_ctl.c:1793:14: warning: context imbalance in 'ip_vs_info_seq_start' - wrong count at exit
net/ipv4/ipvs/ip_vs_ctl.c:1842:13: warning: context imbalance in 'ip_vs_info_seq_stop' - unexpected unlock
Acked-by: NSven Wegener <sven.wegener@stealer.net>
Acked-by: NJulius Volz <juliusv@google.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>

ip_vs_conn_new expects a union nf_inet_addr as the type for its address
parameters, not a plain integer.

This problem was detected by sparse.

make C=1
  CHECK   net/ipv4/ipvs/ip_vs_core.c
net/ipv4/ipvs/ip_vs_core.c:469:9: warning: Using plain integer as NULL pointer
Acked-by: NSven Wegener <sven.wegener@stealer.net>
Acked-by: NJulius Volz <juliusv@google.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>

Jumping to out unlocks __ip_vs_svc_lock, but that lock is not taken until
after code that may jump to out.

This problem was detected by sparse.

make C=1
  CHECK   net/ipv4/ipvs/ip_vs_ctl.c
net/ipv4/ipvs/ip_vs_ctl.c:1332:2: warning: context imbalance in 'ip_vs_edit_service' - unexpected unlock
Acked-by: NSven Wegener <sven.wegener@stealer.net>
Acked-by: NJulius Volz <juliusv@google.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>

  CC [M]  drivers/net/wireless/libertas/wext.o
drivers/net/wireless/libertas/wext.c: In function ‘lbs_get_rts’:
drivers/net/wireless/libertas/wext.c:307: warning: comparison is always
false due to limited range of data type
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Use min_t to avoid warnings when the typesafe version is used.

Explicitly cast u64s to unsigned long long when being passed to printk.
Signed-off-by: NDavid Kilroy <kilroyd@googlemail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

When monitor mode is changed to BSS or IBSS, data trasnfer can not happen
because proper transmit function is not assigend for BSS ,IBSS mode.
This patch fixes this problem by assigning the ieee80211_subif_start_xmit
to device's hard_start_xmit function.
Signed-off-by: NAbhijeet Kolekar <abhijeet.kolekar@intel.com>
Acked-by: NZhu Yi <yi.zhu@intel.com>
Acked-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>