Commit Graph

5304 Commits

Author SHA1 Message Date
Josef 'Jeff' Sipek 4ac4efc1f5 sunrpc: use vfs_path_lookup
use vfs_path_lookup instead of open-coding the necessary functionality.

Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Neil Brown <neilb@suse.de>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:45 -07:00
Michael Ellerman 9e367d8592 jprobes: remove JPROBE_ENTRY()
AFAICT now that jprobe.entry is a void *, JPROBE_ENTRY doesn't do anything
useful - so remove it ..

I've left a do-nothing version so that out-of-tree jprobes code will still
compile without modifications.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:44 -07:00
Jeff Garzik 5e1751f839 Merge branch 'upstream-jgarzik' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into upstream 2007-07-18 18:31:03 -04:00
Linus Torvalds 485cf925d8 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (24 commits)
  [NETFILTER]: xt_connlimit needs to depend on nf_conntrack
  [NETFILTER]: ipt_iprange.h must #include <linux/types.h>
  [IrDA]: Fix IrDA build failure
  [ATM]: nicstar needs virt_to_bus
  [NET]: move __dev_addr_discard adjacent to dev_addr_discard for readability
  [NET]: merge dev_unicast_discard and dev_mc_discard into one
  [NET]: move dev_mc_discard from dev_mcast.c to dev.c
  [NETLINK]: negative groups in netlink_setsockopt
  [PPPOL2TP]: Reset meta-data in xmit function
  [PPPOL2TP]: Fix use-after-free
  [PKT_SCHED]: Some typo fixes in net/sched/Kconfig
  [XFRM]: Fix crash introduced by struct dst_entry reordering
  [TCP]: remove unused argument to cong_avoid op
  [ATM]: [idt77252] Rename CONFIG_ATM_IDT77252_SEND_IDLE to not resemble a Kconfig variable
  [ATM]: [drivers] ioremap balanced with iounmap
  [ATM]: [lanai] sram_test_word() must be __devinit
  [ATM]: [nicstar] Replace C code with call to ARRAY_SIZE() macro.
  [ATM]: Eliminate dead config variable CONFIG_BR2684_FAST_TRANS.
  [ATM]: Replacing kmalloc/memset combination with kzalloc.
  [NET]: gen_estimator deadlock fix
  ...
2007-07-18 10:24:36 -07:00
Jeremy Fitzhardinge 86313c488a usermodehelper: Tidy up waiting
Rather than using a tri-state integer for the wait flag in
call_usermodehelper_exec, define a proper enum, and use that.  I've
preserved the integer values so that any callers I've missed should
still work OK.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Joel Becker <joel.becker@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: David Howells <dhowells@redhat.com>
2007-07-18 08:47:40 -07:00
Jeremy Fitzhardinge 1e66df3ee3 add kstrndup
Add a kstrndup function, modelled on strndup.  Like strndup this
returns a string copied into its own allocated memory, but it copies
no more than the specified number of bytes from the source.

Remove private strndup() from irda code.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@mandriva.com>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Panagiotis Issaris <takis@issaris.org>
Cc: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
2007-07-18 08:47:39 -07:00
Cornelia Huck 3fd8f9e4b6 [NETFILTER]: xt_connlimit needs to depend on nf_conntrack
With NF_CONNTRACK=n, NETFILTER_XT_MATCH_CONNLIMIT=m I get the
following errors on current git:

  CC [M]  net/netfilter/xt_connlimit.o
  In file included from net/netfilter/xt_connlimit.c:27:
  include/net/netfilter/nf_conntrack.h💯 error: field 'ct_general' has incomplete type
  include/net/netfilter/nf_conntrack.h: In function 'nf_ct_get':
  include/net/netfilter/nf_conntrack.h:164: error: 'const struct sk_buff' has no member named 'nfct'
  include/net/netfilter/nf_conntrack.h: In function 'nf_ct_put':
  include/net/netfilter/nf_conntrack.h:171: warning: implicit declaration of function 'nf_conntrack_put'
  include/net/netfilter/nf_conntrack.h: In function 'nf_ct_is_untracked':
  include/net/netfilter/nf_conntrack.h:253: error: 'const struct sk_buff' has no member named 'nfct'
  In file included from net/netfilter/xt_connlimit.c:28:
  include/net/netfilter/nf_conntrack_core.h: In function 'nf_conntrack_confirm':
  include/net/netfilter/nf_conntrack_core.h:68: error: 'struct sk_buff' has no member named 'nfct'

Adding a dependency in Kconfig fixes this.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:38:32 -07:00
Samuel Ortiz 75a69ac6d6 [IrDA]: Fix IrDA build failure
When having built-in IrDA, we hit the following error:

`irda_sysctl_unregister' referenced in section `.init.text' of
net/built-in.o: defined in discarded section `.exit.text' of
net/built-in.o
`irda_proc_unregister' referenced in section `.init.text' of
net/built-in.o: defined in discarded section `.exit.text' of
net/built-in.o
`irsock_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`irttp_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`iriap_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`irda_device_cleanup' referenced in section `.init.text' of
net/built-in.o: defined in discarded section `.exit.text' of
net/built-in.o
`irlap_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
`irlmp_cleanup' referenced in section `.init.text' of net/built-in.o:
defined in discarded section `.exit.text' of net/built-in.o
make[1]: *** [.tmp_vmlinux1] Error 1
make: *** [_all] Error 2

This is due to the irda_init fix recently added, where we call __exit
routines from an __init one. It is a build failure that I didn't catch
because it doesn't show up when building IrDA as a module. My apologies
for that.
The following patch fixes that failure and is against your net-2.6
tree. I hope it can make it to the merge window, and stable@kernel.org
is CCed on this mail.

Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:16:30 -07:00
Denis Cheng 12972621c8 [NET]: move __dev_addr_discard adjacent to dev_addr_discard for readability
Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:12:56 -07:00
Denis Cheng 26cc2522cb [NET]: merge dev_unicast_discard and dev_mc_discard into one
this two functions could share the dev->_xmit_lock acquired context.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:12:03 -07:00
Denis Cheng 456ad75c89 [NET]: move dev_mc_discard from dev_mcast.c to dev.c
Because this function is only called by unregister_netdevice,
this moving could make this non-global function static,
and also remove its declaration in netdevice.h;

Any further, function __dev_addr_discard is also just called by
dev_mc_discard and dev_unicast_discard, keeping this two functions
both in one c file could make __dev_addr_discard also static
and remove its declaration in netdevice.h;

Futhermore, the sequential call to dev_unicast_discard and then
dev_mc_discard in unregister_netdevice have a similar mechanism that:
(netif_tx_lock_bh / __dev_addr_discard / netif_tx_unlock_bh),
they should merged into one to eliminate duplicates in acquiring and
releasing the dev->_xmit_lock, this would be done in my following patch.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:10:54 -07:00
Johannes Berg eb49653449 [NETLINK]: negative groups in netlink_setsockopt
Reading netlink_setsockopt it's not immediately clear why there isn't a
bug when you pass in negative numbers, the reason being that the >=
comparison is really unsigned although 'val' is signed because
nlk->ngroups is unsigned. Make 'val' unsigned too.

[ Update the get_user() cast to match.  --DaveM ]

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:07:51 -07:00
Gabriel Craciunescu 99acaeb92f [PKT_SCHED]: Some typo fixes in net/sched/Kconfig
Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 02:00:04 -07:00
Patrick McHardy bd0bf0765e [XFRM]: Fix crash introduced by struct dst_entry reordering
XFRM expects xfrm_dst->u.next to be same pointer as dst->next, which
was broken by the dst_entry reordering in commit 1e19e02c~, causing
an oops in xfrm_bundle_ok when walking the bundle upwards.

Kill xfrm_dst->u.next and change the only user to use dst->next instead.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 01:55:52 -07:00
Stephen Hemminger 16751347a0 [TCP]: remove unused argument to cong_avoid op
None of the existing TCP congestion controls use the rtt value pased
in the ca_ops->cong_avoid interface.  Which is lucky because seq_rtt
could have been -1 when handling a duplicate ack.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 01:46:58 -07:00
Robert P. J. Day b5492c4ed7 [ATM]: Eliminate dead config variable CONFIG_BR2684_FAST_TRANS.
Signed-off-by: chas williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 01:46:52 -07:00
vignesh babu 782f795689 [ATM]: Replacing kmalloc/memset combination with kzalloc.
Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Signed-off-by: chas williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 01:46:51 -07:00
Ranko Zivojnovic 0929c2dd83 [NET]: gen_estimator deadlock fix
-Fixes ABBA deadlock noted by Patrick McHardy <kaber@trash.net>:

> There is at least one ABBA deadlock, est_timer() does:
> read_lock(&est_lock)
> spin_lock(e->stats_lock) (which is dev->queue_lock)
>
> and qdisc_destroy calls htb_destroy under dev->queue_lock, which
> calls htb_destroy_class, then gen_kill_estimator and this
> write_locks est_lock.

To fix the ABBA deadlock the rate estimators are now kept on an rcu list.

-The est_lock changes the use from protecting the list to protecting
the update to the 'bstat' pointer in order to avoid NULL dereferencing.

-The 'interval' member of the gen_estimator structure removed as it is
not needed.

Signed-off-by: Ranko Zivojnovic <ranko@spidernet.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 01:46:50 -07:00
Jean Tourrilhes 90869b249b [PATCH] softmac: Channel is listed twice in scan output
SoftMAC outputs the channel twice in the scan output. It should
display frequency and channel, but only once for each.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-07-17 21:56:17 -04:00
J. Bruce Fields 4796f45740 knfsd: nfsd4: secinfo handling without secinfo= option
We could return some sort of error in the case where someone asks for secinfo
on an export without the secinfo= option set--that'd be no worse than what
we've been doing.  But it's not really correct.  So, hack up an approximate
secinfo response in that case--it may not be complete, but it'll tell the
client at least one acceptable security flavor.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:08 -07:00
Usha Ketineni ae4c40b1d8 knfsd: rpc: add gss krb5 and spkm3 oid values
Adds oid values to the gss_api mechanism structures.  On the NFSV4 server
side, these are required as part of the security triple (oid,qop,service)
information being sent in the response of the SECINFO operation.

Signed-off-by: Usha Ketineni <uketinen@us.ibm.com>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:08 -07:00
J. Bruce Fields 3ab4d8b121 knfsd: nfsd: set rq_client to ip-address-determined-domain
We want it to be possible for users to restrict exports both by IP address and
by pseudoflavor.  The pseudoflavor information has previously been passed
using special auth_domains stored in the rq_client field.  After the preceding
patch that stored the pseudoflavor in rq_pflavor, that's now superfluous; so
now we use rq_client for the ip information, as auth_null and auth_unix do.

However, we keep around the special auth_domain in the rq_gssclient field for
backwards compatibility purposes, so we can still do upcalls using the old
"gss/pseudoflavor" auth_domain if upcalls using the unix domain to give us an
appropriate export.  This allows us to continue supporting old mountd.

In fact, for this first patch, we always use the "gss/pseudoflavor"
auth_domain (and only it) if it is available; thus rq_client is ignored in the
auth_gss case, and this patch on its own makes no change in behavior; that
will be left to later patches.

Note on idmap: I'm almost tempted to just replace the auth_domain in the idmap
upcall by a dummy value--no version of idmapd has ever used it, and it's
unlikely anyone really wants to perform idmapping differently depending on the
where the client is (they may want to perform *credential* mapping
differently, but that's a different matter--the idmapper just handles id's
used in getattr and setattr).  But I'm updating the idmapd code anyway, just
out of general backwards-compatibility paranoia.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:07 -07:00
Andy Adamson c4170583f6 knfsd: nfsd4: store pseudoflavor in request
Add a new field to the svc_rqst structure to record the pseudoflavor that the
request was made with.  For now we record the pseudoflavor but don't use it
for anything.

Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:07 -07:00
Rafael J. Wysocki 8314418629 Freezer: make kernel threads nonfreezable by default
Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:02 -07:00
Rusty Russell 8e1f936b73 mm: clean up and kernelify shrinker registration
I can never remember what the function to register to receive VM pressure
is called.  I have to trace down from __alloc_pages() to find it.

It's called "set_shrinker()", and it needs Your Help.

1) Don't hide struct shrinker.  It contains no magic.
2) Don't allocate "struct shrinker".  It's not helpful.
3) Call them "register_shrinker" and "unregister_shrinker".
4) Call the function "shrink" not "shrinker".
5) Reduce the 17 lines of waffly comments to 13, but document it properly.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: David Chinner <dgc@sgi.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:00 -07:00
Linus Torvalds 1f1c2881f6 Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (37 commits)
  forcedeth bug fix: realtek phy
  forcedeth bug fix: vitesse phy
  forcedeth bug fix: cicada phy
  atl1: reorder atl1_main functions
  atl1: fix excessively indented code
  atl1: cleanup atl1_main
  atl1: header file cleanup
  atl1: remove irq_sem
  cdc-subset to support new vendor/product ID
  8139cp: implement the missing dev->tx_timeout
  myri10ge: Remove nonsensical limit in the tx done routine
  gianfar: kill unused header
  EP93XX_ETH must select MII
  macb: Add multicast capability
  macb: Use generic PHY layer
  s390: add barriers to qeth driver
  s390: scatter-gather for inbound traffic in qeth driver
  eHEA: Introducing support vor DLPAR memory add
  Fix a potential NULL pointer dereference in free_shared_mem() in drivers/net/s2io.c
  [PATCH] softmac: Fix ESSID problem
  ...
2007-07-16 17:48:54 -07:00
Jeff Garzik 5be8084673 Merge branch 'upstream-jgarzik' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into upstream 2007-07-16 17:59:03 -04:00
Linus Torvalds 2e27afb300 Revert "[NET]: Fix races in net_rx_action vs netpoll."
This reverts commit 29578624e3.

Ingo Molnar reports complete breakage with his e1000 card (no
networking, card reports transmit timeouts), and bisected it down to
this commit.  Let's figure out what went wrong, but not keep breaking
machines until we do.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Olaf Kirch <olaf.kirch@oracle.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 14:31:08 -07:00
Miloslav Trmac 522ed7767e Audit: add TTY input auditing
Add TTY input auditing, used to audit system administrator's actions.  This is
required by various security standards such as DCID 6/3 and PCI to provide
non-repudiation of administrator's actions and to allow a review of past
actions if the administrator seems to overstep their duties or if the system
becomes misconfigured for unknown reasons.  These requirements do not make it
necessary to audit TTY output as well.

Compared to an user-space keylogger, this approach records TTY input using the
audit subsystem, correlated with other audit events, and it is completely
transparent to the user-space application (e.g.  the console ioctls still
work).

TTY input auditing works on a higher level than auditing all system calls
within the session, which would produce an overwhelming amount of mostly
useless audit events.

Add an "audit_tty" attribute, inherited across fork ().  Data read from TTYs
by process with the attribute is sent to the audit subsystem by the kernel.
The audit netlink interface is extended to allow modifying the audit_tty
attribute, and to allow sending explanatory audit events from user-space (for
example, a shell might send an event containing the final command, after the
interactive command-line editing and history expansion is performed, which
might be difficult to decipher from the TTY input alone).

Because the "audit_tty" attribute is inherited across fork (), it would be set
e.g.  for sshd restarted within an audited session.  To prevent this, the
audit_tty attribute is cleared when a process with no open TTY file
descriptors (e.g.  after daemon startup) opens a TTY.

See https://www.redhat.com/archives/linux-audit/2007-June/msg00000.html for a
more detailed rationale document for an older version of this patch.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Miloslav Trmac <mitr@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Paul Fulghum <paulkf@microgate.com>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:47 -07:00
Ulrich Drepper 4a19542e5f O_CLOEXEC for SCM_RIGHTS
Part two in the O_CLOEXEC saga: adding support for file descriptors received
through Unix domain sockets.

The patch is once again pretty minimal, it introduces a new flag for recvmsg
and passes it just like the existing MSG_CMSG_COMPAT flag.  I think this bit
is not used otherwise but the networking people will know better.

This new flag is not recognized by recvfrom and recv.  These functions cannot
be used for that purpose and the asymmetry this introduces is not worse than
the already existing MSG_CMSG_COMPAT situations.

The patch must be applied on the patch which introduced O_CLOEXEC.  It has to
remove static from the new get_unused_fd_flags function but since scm.c cannot
live in a module the function still hasn't to be exported.

Here's a test program to make sure the code works.  It's so much longer than
the actual patch...

#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>

#ifndef O_CLOEXEC
# define O_CLOEXEC 02000000
#endif
#ifndef MSG_CMSG_CLOEXEC
# define MSG_CMSG_CLOEXEC 0x40000000
#endif

int
main (int argc, char *argv[])
{
  if (argc > 1)
    {
      int fd = atol (argv[1]);
      printf ("child: fd = %d\n", fd);
      if (fcntl (fd, F_GETFD) == 0 || errno != EBADF)
        {
          puts ("file descriptor valid in child");
          return 1;
        }
      return 0;

    }

  struct sockaddr_un sun;
  strcpy (sun.sun_path, "./testsocket");
  sun.sun_family = AF_UNIX;

  char databuf[] = "hello";
  struct iovec iov[1];
  iov[0].iov_base = databuf;
  iov[0].iov_len = sizeof (databuf);

  union
  {
    struct cmsghdr hdr;
    char bytes[CMSG_SPACE (sizeof (int))];
  } buf;
  struct msghdr msg = { .msg_iov = iov, .msg_iovlen = 1,
                        .msg_control = buf.bytes,
                        .msg_controllen = sizeof (buf) };
  struct cmsghdr *cmsg = CMSG_FIRSTHDR (&msg);

  cmsg->cmsg_level = SOL_SOCKET;
  cmsg->cmsg_type = SCM_RIGHTS;
  cmsg->cmsg_len = CMSG_LEN (sizeof (int));

  msg.msg_controllen = cmsg->cmsg_len;

  pid_t child = fork ();
  if (child == -1)
    error (1, errno, "fork");
  if (child == 0)
    {
      int sock = socket (PF_UNIX, SOCK_STREAM, 0);
      if (sock < 0)
        error (1, errno, "socket");

      if (bind (sock, (struct sockaddr *) &sun, sizeof (sun)) < 0)
        error (1, errno, "bind");
      if (listen (sock, SOMAXCONN) < 0)
        error (1, errno, "listen");

      int conn = accept (sock, NULL, NULL);
      if (conn == -1)
        error (1, errno, "accept");

      *(int *) CMSG_DATA (cmsg) = sock;
      if (sendmsg (conn, &msg, MSG_NOSIGNAL) < 0)
        error (1, errno, "sendmsg");

      return 0;
    }

  /* For a test suite this should be more robust like a
     barrier in shared memory.  */
  sleep (1);

  int sock = socket (PF_UNIX, SOCK_STREAM, 0);
  if (sock < 0)
    error (1, errno, "socket");

  if (connect (sock, (struct sockaddr *) &sun, sizeof (sun)) < 0)
    error (1, errno, "connect");
  unlink (sun.sun_path);

  *(int *) CMSG_DATA (cmsg) = -1;

  if (recvmsg (sock, &msg, MSG_CMSG_CLOEXEC) < 0)
    error (1, errno, "recvmsg");

  int fd = *(int *) CMSG_DATA (cmsg);
  if (fd == -1)
    error (1, 0, "no descriptor received");

  char fdname[20];
  snprintf (fdname, sizeof (fdname), "%d", fd);
  execl ("/proc/self/exe", argv[0], fdname, NULL);
  puts ("execl failed");
  return 1;
}

[akpm@linux-foundation.org: Fix fastcall inconsistency noted by Michael Buesch]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:45 -07:00
Andrew Morton 09561f44c7 authgss build fix
Recent breakage..

net/sunrpc/auth_gss/auth_gss.c:1002: warning: implicit declaration of function 'lock_kernel'
net/sunrpc/auth_gss/auth_gss.c:1004: warning: implicit declaration of function 'unlock_kernel'

Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:34 -07:00
Linus Torvalds d3502d7f25 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (53 commits)
  [TCP]: Verify the presence of RETRANS bit when leaving FRTO
  [IPV6]: Call inet6addr_chain notifiers on link down
  [NET_SCHED]: Kill CONFIG_NET_CLS_POLICE
  [NET_SCHED]: act_api: qdisc internal reclassify support
  [NET_SCHED]: sch_dsmark: act_api support
  [NET_SCHED]: sch_atm: act_api support
  [NET_SCHED]: sch_atm: Lindent
  [IPV6]: MSG_ERRQUEUE messages do not pass to connected raw sockets
  [IPV4]: Cleanup call to __neigh_lookup()
  [NET_SCHED]: Revert "avoid transmit softirq on watchdog wakeup" optimization
  [NETFILTER]: nf_conntrack: UDPLITE support
  [NETFILTER]: nf_conntrack: mark protocols __read_mostly
  [NETFILTER]: x_tables: add connlimit match
  [NETFILTER]: Lower *tables printk severity
  [NETFILTER]: nf_conntrack: Don't track locally generated special ICMP error
  [NETFILTER]: nf_conntrack: Introduces nf_ct_get_tuplepr and uses it
  [NETFILTER]: nf_conntrack: make l3proto->prepare() generic and renames it
  [NETFILTER]: nf_conntrack: Increment error count on parsing IPv4 header
  [NET]: Add ethtool support for NETIF_F_IPV6_CSUM devices.
  [AF_IUCV]: Add lock when updating accept_q
  ...
2007-07-15 16:50:46 -07:00
Linus Torvalds d2a9a8ded4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: fix a race condition bug in umount which caused a segfault
  9p: re-enable mount time debug option
  9p: cache meta-data when cache=loose
  net/9p: set error to EREMOTEIO if trans->write returns zero
  net/9p: change net/9p module name to 9pnet
  9p: Reorganization of 9p file system code
2007-07-15 16:44:53 -07:00
Al Viro ececfdee1c fallout from constified seq_operations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-15 16:40:52 -07:00
Ilpo Järvinen 0a9f2a467d [TCP]: Verify the presence of RETRANS bit when leaving FRTO
For yet unknown reason, something cleared SACKED_RETRANS bit
underneath FRTO.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:19:29 -07:00
Vlad Yasevich 063ed369c9 [IPV6]: Call inet6addr_chain notifiers on link down
Currently if the link is brought down via ip link or ifconfig down,
the inet6addr_chain notifiers are not called even though all
the addresses are removed from the interface.  This caused SCTP
to add duplicate addresses to it's list.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:16:35 -07:00
Patrick McHardy c3bc7cff8f [NET_SCHED]: Kill CONFIG_NET_CLS_POLICE
The NET_CLS_ACT option is now a full replacement for NET_CLS_POLICE,
remove the old code. The config option will be kept around to select
the equivalent NET_CLS_ACT options for a short time to allow easier
upgrades.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:03:05 -07:00
Patrick McHardy 73ca4918fb [NET_SCHED]: act_api: qdisc internal reclassify support
The behaviour of NET_CLS_POLICE for TC_POLICE_RECLASSIFY was to return
it to the qdisc, which could handle it internally or ignore it. With
NET_CLS_ACT however, tc_classify starts over at the first classifier
and never returns it to the qdisc. This makes it impossible to support
qdisc-internal reclassification, which in turn makes it impossible to
remove the old NET_CLS_POLICE code without breaking compatibility since
we have two qdiscs (CBQ and ATM) that support this.

This patch adds a tc_classify_compat function that handles
reclassification the old way and changes CBQ and ATM to use it.

This again is of course not fully backwards compatible with the previous
NET_CLS_ACT behaviour. Unfortunately there is no way to fully maintain
compatibility *and* support qdisc internal reclassification with
NET_CLS_ACT, but this seems like the better choice over keeping the two
incompatible options around forever.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:02:31 -07:00
Patrick McHardy f6853e2df3 [NET_SCHED]: sch_dsmark: act_api support
Handle act_api classification results.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:02:10 -07:00
Patrick McHardy 9210080445 [NET_SCHED]: sch_atm: act_api support
Handle act_api classification results.

The ATM scheduler behaves slightly different than other schedulers
in that it only handles policer results for successful classifications,
this behaviour is retained for the act_api case.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:01:49 -07:00
Patrick McHardy b0188d4dbe [NET_SCHED]: sch_atm: Lindent
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 00:01:25 -07:00
Dmitry Butskoy f13ec93fba [IPV6]: MSG_ERRQUEUE messages do not pass to connected raw sockets
From: Dmitry Butskoy <dmitry@butskoy.name>

Taken from http://bugzilla.kernel.org/show_bug.cgi?id=8747

Problem Description:

It is related to the possibility to obtain MSG_ERRQUEUE messages from the udp
and raw sockets, both connected and unconnected.

There is a little typo in net/ipv6/icmp.c code, which prevents such messages
to be delivered to the errqueue of the correspond raw socket, when the socket
is CONNECTED.  The typo is due to swap of local/remote addresses.

Consider __raw_v6_lookup() function from net/ipv6/raw.c. When a raw socket is
looked up usual way, it is something like:

sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif);

where "daddr" is a destination address of the incoming packet (IOW our local
address), "saddr" is a source address of the incoming packet (the remote end).

But when the raw socket is looked up for some icmp error report, in
net/ipv6/icmp.c:icmpv6_notify() , daddr/saddr are obtained from the echoed
fragment of the "bad" packet, i.e.  "daddr" is the original destination
address of that packet, "saddr" is our local address.  Hence, for
icmpv6_notify() must use "saddr, daddr" in its arguments, not "daddr, saddr"
...

Steps to reproduce:

Create some raw socket, connect it to an address, and cause some error
situation: f.e. set ttl=1 where the remote address is more than 1 hop to reach.
Set IPV6_RECVERR .
Then send something and wait for the error (f.e. poll() with POLLERR|POLLIN).
You should receive "time exceeded" icmp message (because of "ttl=1"), but the
socket do not receive it.

If you do not connect your raw socket, you will receive MSG_ERRQUEUE
successfully.  (The reason is that for unconnected socket there are no actual
checks for local/remote addresses).

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 23:53:08 -07:00
Jean Delvare 1b1ac759d7 [IPV4]: Cleanup call to __neigh_lookup()
Back in the times of Linux 2.2, negative values for the creat parameter
of __neigh_lookup() had a particular meaning, but no longer, so we
should pass 1 instead.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:51:44 -07:00
Patrick McHardy 0621ed2e4e [NET_SCHED]: Revert "avoid transmit softirq on watchdog wakeup" optimization
As noticed by Ranko Zivojnovic <ranko@spidernet.net>, calling qdisc_run
from the timer handler can result in deadlock:

> CPU#0
>
> qdisc_watchdog() fires and gets dev->queue_lock
> qdisc_run()...qdisc_restart()...
> -> releases dev->queue_lock and enters dev_hard_start_xmit()
>
> CPU#1
>
> tc del qdisc dev ...
> qdisc_graft()...dev_graft_qdisc()...dev_deactivate()...
> -> grabs dev->queue_lock ...
>
> qdisc_reset()...{cbq,hfsc,htb,netem,tbf}_reset()...qdisc_watchdog_cancel()...
> -> hrtimer_cancel() - waiting for the qdisc_watchdog() to exit, while still
>		        holding dev->queue_lock
>
> CPU#0
>
> dev_hard_start_xmit() returns ...
> -> wants to get dev->queue_lock(!)
>
> DEADLOCK!

The entire optimization is a bit questionable IMO, it moves potentially
large parts of NET_TX_SOFTIRQ work to TIMER_SOFTIRQ/HRTIMER_SOFTIRQ,
which kind of defeats the separation of them.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Ranko Zivojnovic <ranko@spidernet.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:49:26 -07:00
Patrick McHardy 59eecdfb16 [NETFILTER]: nf_conntrack: UDPLITE support
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:48:44 -07:00
Patrick McHardy 61075af51f [NETFILTER]: nf_conntrack: mark protocols __read_mostly
Also remove two unnecessary EXPORT_SYMBOLs and move the
nf_conntrack_l3proto_ipv4 declaration to the correct file.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:48:19 -07:00
Jan Engelhardt 370786f9cf [NETFILTER]: x_tables: add connlimit match
ipt_connlimit has been sitting in POM-NG for a long time.
Here is a new shiny xt_connlimit with:

 * xtables'ified
 * will request the layer3 module
   (previously it hotdropped every packet when it was not loaded)
 * fixed: there was a deadlock in case of an OOM condition
 * support for any layer4 protocol (e.g. UDP/SCTP)
 * using jhash, as suggested by Eric Dumazet
 * ipv6 support

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:47:26 -07:00
Patrick McHardy a887c1c148 [NETFILTER]: Lower *tables printk severity
Lower ip6tables, arptables and ebtables printk severity similar to
Dan Aloni's patch for iptables.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:46:15 -07:00
Yasuyuki Kozakai 130e7a83d7 [NETFILTER]: nf_conntrack: Don't track locally generated special ICMP error
The conntrack assigned to locally generated ICMP error is usually the one
assigned to the original packet which has caused the error. But if
the original packet is handled as invalid by nf_conntrack, no conntrack
is assigned to the original packet. Then nf_ct_attach() cannot assign
any conntrack to the ICMP error packet. In that case the current
nf_conntrack_icmp assigns appropriate conntrack to it. But the current
code mistakes the direction of the packet. As a result, NAT code mistakes
the address to be mangled.

To fix the bug, this changes nf_conntrack_icmp not to assign conntrack
to such ICMP error. Actually no address is necessary to be mangled
in this case.

Spotted by Jordan Russell.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:45:41 -07:00
Yasuyuki Kozakai e2a3123fbe [NETFILTER]: nf_conntrack: Introduces nf_ct_get_tuplepr and uses it
nf_ct_get_tuple() requires the offset to transport header and that bothers
callers such as icmp[v6] l4proto modules. This introduces new function
to simplify them.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-14 20:45:14 -07:00