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This allows the write queue implementation to be changed,
for example, to one which allows fast interval searching.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Change net/core, ipv4 and ipv6 sysctl variables to __read_mostly.
Couldn't actually measure any performance increase while testing (.3%
I consider noise), but seems like the right thing to do.
Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implementation of packetization layer path mtu discovery for TCP, based on
the internet-draft currently found at
<http://www.ietf.org/internet-drafts/draft-ietf-pmtud-method-05.txt>.
Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Minor spelling fixes for TCP code.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This changeset basically moves tcp_sk()->{ca_ops,ca_state,etc} to inet_csk(),
minimal renaming/moving done in this changeset to ease review.
Most of it is just changes of struct tcp_sock * to struct sock * parameters.
With this we move to a state closer to two interesting goals:
1. Generalisation of net/ipv4/tcp_diag.c, becoming inet_diag.c, being used
for any INET transport protocol that has struct inet_hashinfo and are
derived from struct inet_connection_sock. Keeps the userspace API, that will
just not display DCCP sockets, while newer versions of tools can support
DCCP.
2. INET generic transport pluggable Congestion Avoidance infrastructure, using
the current TCP CA infrastructure with DCCP.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This also improves reqsk_queue_prune and renames it to
inet_csk_reqsk_queue_prune, as it deals with both inet_connection_sock
and inet_request_sock objects, not just with request_sock ones thus
belonging to inet_request_sock.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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With this we're very close to getting all of the current TCP
refactorings in my dccp-2.6 tree merged, next changeset will export
some functions needed by the current DCCP code and then dccp-2.6.git
will be born!
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Completing the previous changeset, this also generalises tcp_v4_synq_add,
renaming it to inet_csk_reqsk_queue_hash_add, already geing used in the
DCCP tree, which I plan to merge RSN.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This creates struct inet_connection_sock, moving members out of struct
tcp_sock that are shareable with other INET connection oriented
protocols, such as DCCP, that in my private tree already uses most of
these members.
The functions that operate on these members were renamed, using a
inet_csk_ prefix while not being moved yet to a new file, so as to
ease the review of these changes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is part of the grand scheme to eliminate the qlen
member of skb_queue_head, and subsequently remove the
'list' member of sk_buff.
Most users of skb_queue_len() want to know if the queue is
empty or not, and that's trivially done with skb_queue_empty()
which doesn't use the skb_queue_head->qlen member and instead
uses the queue list emptyness as the test.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This chunks out the accept_queue and tcp_listen_opt code and moves
them to net/core/request_sock.c and include/net/request_sock.h, to
make it useful for other transport protocols, DCCP being the first one
to use it.
Next patches will rename tcp_listen_opt to accept_sock and remove the
inline tcp functions that just call a reqsk_queue_ function.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ok, this one just renames some stuff to have a better namespace and to
dissassociate it from TCP:
struct open_request -> struct request_sock
tcp_openreq_alloc -> reqsk_alloc
tcp_openreq_free -> reqsk_free
tcp_openreq_fastfree -> __reqsk_free
With this most of the infrastructure closely resembles a struct
sock methods subset.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Kept this first changeset minimal, without changing existing names to
ease peer review.
Basicaly tcp_openreq_alloc now receives the or_calltable, that in turn
has two new members:
->slab, that replaces tcp_openreq_cachep
->obj_size, to inform the size of the openreq descendant for
a specific protocol
The protocol specific fields in struct open_request were moved to a
class hierarchy, with the things that are common to all connection
oriented PF_INET protocols in struct inet_request_sock, the TCP ones
in tcp_request_sock, that is an inet_request_sock, that is an
open_request.
I.e. this uses the same approach used for the struct sock class
hierarchy, with sk_prot indicating if the protocol wants to use the
open_request infrastructure by filling in sk_prot->rsk_prot with an
or_calltable.
Results? Performance is improved and TCP v4 now uses only 64 bytes per
open request minisock, down from 96 without this patch :-)
Next changeset will rename some of the structs, fields and functions
mentioned above, struct or_calltable is way unclear, better name it
struct request_sock_ops, s/struct open_request/struct request_sock/g,
etc.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ross moved. Remove the bad email address so people will find the correct
one in ./CREDITS.
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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It is needed for tcp_reset_xmit_timer(), which is invoked by
tcp_prequeue() which is invoked from tcp_ipv6.c
Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Various routines were putting a full struct tcp_sock on
the local stack. What they really wanted was a subset
of this information when doing TCP options processing
when we only have a mini-socket (for example in SYN-RECVD
and TIME_WAIT states).
Therefore pull out the needed information into a sub-struct
and use that in the TCP options processing routines.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IMHO the TSO stuff has mostly settled down now. As a result
tcp_pcount_t is now more of a liability in that it reduces the
readability of the code.
So here is a patch to remove it.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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into nuts.davemloft.net:/disk1/BK/net-2.6
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No need for two structs, follow the new inet_sock layout
style.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: David S. Miller <davem@davemloft.net>
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With this we can remove all the cut'n'pasted layouts in all inet_sock
derived classes, such as tcp_sock, udp_sock, sctp_sock, etc.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: David S. Miller <davem@davemloft.net>
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into nuts.davemloft.net:/disk1/BK/net-2.6
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The patch below contains the following possible cleanups:
- make some needlessly global code static
- remove the following unused global functions:
- fib_rules.c: fib_rules_map_destination
- xfrm4_policy.: xfrm4_fini
- remove the following unneeded EXPORT_SYMBOL:
- tcp_timer.c: tcp_timer_bug_msg
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Closed: Bug#3717 (by John Goerzen <goerzen@complete.org>)
Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
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Previously TSO would not abide by the congestion
window properly. Essentially, each TSO packet would
be trated just like 1 normal packet, even though a TSO
packet generates more than 1 normal packet. This
violates congestion window rules entirely.
So now we record the TSO factor, a count of how many
real packets a TSO packet will generate, and include
this in all the packet counting routines.
This initial version has a bug in that skb_entail() is
not the correct time to figure out the TSO factor for
the SKB, and tp->mss_tso_factor is not necessarily the
right value for a given SKB. Will fix this up next.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
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Current 2.6.7 tree acts as if it is alway under memory pressure because
a recent change did a s/tcp_memory_pressure/tcp_prot.memory_pressure/.
The problem is tcp_prot.memory_pressure is a pointer, so it is always non-zero!
Rather than using *tcp_prot.memory_pressure, just go back to looking at
tcp_memory_pressure.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>
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This is needed because tcpv6_prot has to point to the same place tcp_prot points,
as they share the same accounting variables.
This fixes a bug noticed by David Miller when using the ipv6_mapped functionality,
thanks David!
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: David S. Miller <davem@redhat.com>
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Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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The poor cousins also need this, LLC will be the first to use it.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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This makes the best practices already in place in bluetooth
and tcp/ip available for all protocols, i.e. references must
be managed when associating timers with struct sock instances,
also makes the code a bit more clean.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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Also move the EXPORT_SYMBOL(tcp_statistics) to net/ipv4/tcp.c, so that
finally the tcp.h header can be removed from net/netsyms.c, ctags doesn't
catches the variables defined with DEFINE_SNMP_STAT :-\
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With this the data dependency is reduced to just making sure that the first
member of both struct sock and struct tcp_tw_bucket are a struct sock_common.
Also makes it easier to grep for struct sock and struct tcp_tw_bucket usage in
the tree as all the members in those structs are prefixed, respectively, with
sk_ and tw_, like struct inode (i_), struct block_device (bd_), etc.
Checked namespace with make tags/ctags, just one colision with the macros for
the struct sock members, with a wanrouter struct, fixed that
s/sk_state/state_sk/g in the wanrouter struct.
Checked as well if the names of the members in both structs collided with some
macro, none found.
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This makes:
1. simpler primitive to access struct sock flags, shorter
2. we check if the flag is valid by using enum sock_flags
3. we can change the implementation to an open coded bit operations
if it proves to be faster than the more general bit manipulation
routines now used, i.e. we only have to change sock.h, not the
whole net tree like now
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Hortas.
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Motivation for this modification is that especially on some wireless
network technologies there are delay spikes that trigger RTO even though
no packets are lost. F-RTO sender continues by sending new data after RTO
retransmission in order to avoid unnecessary retransmissions in that case.
If the sender sees any duplicate acks after the RTO retransmission, it
reverts to traditional slow start retransmissions. If new acks arrive
after forward transmissions, they very likely indicate that the RTO was
indeed spurious and the sender can continue sending new data (because
only one segment was retransmitted).
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- Change socket lock users to owner which is a pointer.
- Add sock_owned_by_user
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out of struct sock.
Fix -EFAULT handling in TCP direct user copy handling.
Use struct initializers in IPV6 ndisc code.
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Work done by Arnaldo Carvalho de Melo.
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- me/Al Viro: fix bdget() oops with block device modules that don't
clean up after they exit
- Alan Cox: continued merging (drivers, license tags)
- David Miller: sparc update, network fixes
- Christoph Hellwig: work around broken drivers that add a gendisk more
than once
- Jakub Jelinek: handle more ELF loading special cases
- Trond Myklebust: NFS client and lockd reclaimer cleanups/fixes
- Greg KH: USB updates
- Mikael Pettersson: sparate out local APIC / IO-APIC config options
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- Manfred Spraul: /proc/pid/maps cleanup (and bugfix for non-x86)
- Al Viro: "block device fs" - cleanup of page cache handling
- Hugh Dickins: VM/shmem cleanups and swap search speedup
- David Miller: sparc updates, soc driver typo fix, net updates
- Jeff Garzik: network driver updates (dl2k, yellowfin and tulip)
- Neil Brown: knfsd cleanups and fixues
- Ben LaHaise: zap_page_range merge from -ac
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- Christoph Hellwig: clean up personality handling a bit
- Robert Love: update sysctl/vm documentation
- make the three-argument (that everybody hates) "min()" be "min_t()",
and introduce a type-anal "min()" that complains about arguments of
different types.
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- David Miller: sparc updates, FAT fs fixes, btaudio build fix
- David Gibson: Orinoco driver update
- Kevin Fleming: more disks the HPT controller doesn't like
- David Miller: "min()/max()" cleanups. Understands signs and sizes.
- Ben LaHaise: make vma merging more generous, help Mozilla /proc/<>/maps
- Jens Axboe: CD updates
- Trond Myklebust: save away NFS credentials in inode, so that mmap can
writeout.
- Mark Hemment: HIGHMEM ops cleanups
- Jes Sorensen: use "unsigned long" for flags in various drivers
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- Hui-Fen Hsu: sis900 driver update
- NIIBE Yutaka: Super-H update
- Alan Cox: more resyncs (ARM down, but more to go)
- David Miller: network zerocopy, Sparc sync, qlogic,FC fix, etc.
- David Miller/me: get rid of various drivers hacks to do mmap
alignment behind the back of the VM layer. Create a real
protocol for it.
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- Jens: better ordering of requests when unable to merge
- Neil Brown: make md work as a module again (we cannot autodetect
in modules, not enough background information)
- Neil Brown: raid5 SMP locking cleanups
- Neil Brown: nfsd: handle Irix NFS clients named pipe behavior and
dentry leak fix
- maestro3 shutdown fix
- fix dcache hash calculation that could cause bad hashes under certain
circumstances (Dean Gaudet)
- David Miller: networking and sparc updates
- Jeff Garzik: include file cleanups
- Andy Grover: ACPI update
- Coda-fs error return fixes
- rth: alpha Jensen update
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