linux.git/net/core, branch v2.6.17 Linux kernel source tree [NET]: dev.c comment fixes 2006-05-26T20:25:24+00:00 Stephen Hemminger shemminger@osdl.org 2006-05-26T20:25:24+00:00 3041a069090224462e27da1bc9483b463eb40841 Noticed that dev_alloc_name() comment was incorrect, and more spellung errors. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Noticed that dev_alloc_name() comment was incorrect, and more spellung
errors.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
[NEIGH]: Fix IP-over-ATM and ARP interaction. 2006-05-12T21:56:08+00:00 Simon Kelley simon@thekelleys.org.uk 2006-05-12T21:56:08+00:00 bd89efc532fe41f867f848144cc8b42054ddf6f9 The classical IP over ATM code maintains its own IPv4 <-> <ATM stuff> ARP table, using the standard neighbour-table code. The neigh_table_init function adds this neighbour table to a linked list of all neighbor tables which is used by the functions neigh_delete() neigh_add() and neightbl_set(), all called by the netlink code. Once the ATM neighbour table is added to the list, there are two tables with family == AF_INET there, and ARP entries sent via netlink go into the first table with matching family. This is indeterminate and often wrong. To see the bug, on a kernel with CLIP enabled, create a standard IPv4 ARP entry by pinging an unused address on a local subnet. Then attempt to complete that entry by doing ip neigh replace <ip address> lladdr <some mac address> nud reachable Looking at the ARP tables by using ip neigh show will reveal two ARP entries for the same address. One of these can be found in /proc/net/arp, and the other in /proc/net/atm/arp. This patch adds a new function, neigh_table_init_no_netlink() which does everything the neigh_table_init() does, except add the table to the netlink all-arp-tables chain. In addition neigh_table_init() has a check that all tables on the chain have a distinct address family. The init call in clip.c is changed to call neigh_table_init_no_netlink(). Since ATM ARP tables are rather more complicated than can currently be handled by the available rtattrs in the netlink protocol, no functionality is lost by this patch, and non-ATM ARP manipulation via netlink is rescued. A more complete solution would involve a rtattr for ATM ARP entries and some way for the netlink code to give neigh_add and friends more information than just address family with which to find the correct ARP table. [ I've changed the assertion checking in neigh_table_init() to not use BUG_ON() while holding neigh_tbl_lock. Instead we remember that we found an existing tbl with the same family, and after dropping the lock we'll give a diagnostic kernel log message and a stack dump. -DaveM ] Signed-off-by: Simon Kelley <simon@thekelleys.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net> 
The classical IP over ATM code maintains its own IPv4 <-> <ATM stuff>
ARP table, using the standard neighbour-table code. The
neigh_table_init function adds this neighbour table to a linked list
of all neighbor tables which is used by the functions neigh_delete()
neigh_add() and neightbl_set(), all called by the netlink code.

Once the ATM neighbour table is added to the list, there are two
tables with family == AF_INET there, and ARP entries sent via netlink
go into the first table with matching family. This is indeterminate
and often wrong.

To see the bug, on a kernel with CLIP enabled, create a standard IPv4
ARP entry by pinging an unused address on a local subnet. Then attempt
to complete that entry by doing

ip neigh replace <ip address> lladdr <some mac address> nud reachable

Looking at the ARP tables by using 

ip neigh show

will reveal two ARP entries for the same address. One of these can be
found in /proc/net/arp, and the other in /proc/net/atm/arp.

This patch adds a new function, neigh_table_init_no_netlink() which
does everything the neigh_table_init() does, except add the table to
the netlink all-arp-tables chain. In addition neigh_table_init() has a
check that all tables on the chain have a distinct address family.
The init call in clip.c is changed to call
neigh_table_init_no_netlink().

Since ATM ARP tables are rather more complicated than can currently be
handled by the available rtattrs in the netlink protocol, no
functionality is lost by this patch, and non-ATM ARP manipulation via
netlink is rescued. A more complete solution would involve a rtattr
for ATM ARP entries and some way for the netlink code to give
neigh_add and friends more information than just address family with
which to find the correct ARP table.

[ I've changed the assertion checking in neigh_table_init() to not
  use BUG_ON() while holding neigh_tbl_lock.  Instead we remember that
  we found an existing tbl with the same family, and after dropping
  the lock we'll give a diagnostic kernel log message and a stack dump.
  -DaveM ]

Signed-off-by: Simon Kelley <simon@thekelleys.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
[NET]: Do sysfs registration as part of register_netdevice. 2006-05-10T20:21:17+00:00 Stephen Hemminger shemminger@osdl.org 2006-05-10T20:21:17+00:00 b17a7c179dd3ce7d04373fddf660eda21efc9db9 The last step of netdevice registration was being done by a delayed call, but because it was delayed, it was impossible to return any error code if the class_device registration failed. Side effects: * one state in registration process is unnecessary. * register_netdevice can sleep inside class_device registration/hotplug * code in netdev_run_todo only does unregistration so it is simpler. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
The last step of netdevice registration was being done by a delayed
call, but because it was delayed, it was impossible to return any error
code if the class_device registration failed.

Side effects:
 * one state in registration process is unnecessary.
 * register_netdevice can sleep inside class_device registration/hotplug
 * code in netdev_run_todo only does unregistration so it is simpler.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
[NET] linkwatch: Handle jiffies wrap-around 2006-05-09T22:27:54+00:00 Herbert Xu herbert@gondor.apana.org.au 2006-05-09T22:27:54+00:00 8c1056839e808aad728db86d739ffec71d2d1db8 The test used in the linkwatch does not handle wrap-arounds correctly. Since the intention of the code is to eliminate bursts of messages we can afford to delay things up to a second. Using that fact we can easily handle wrap-arounds by making sure that we don't delay things by more than one second. This is based on diagnosis and a patch by Stefan Rompf. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Stefan Rompf <stefan@loplof.de> Signed-off-by: David S. Miller <davem@davemloft.net> 
The test used in the linkwatch does not handle wrap-arounds correctly.
Since the intention of the code is to eliminate bursts of messages we
can afford to delay things up to a second.  Using that fact we can
easily handle wrap-arounds by making sure that we don't delay things
by more than one second.

This is based on diagnosis and a patch by Stefan Rompf.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stefan Rompf <stefan@loplof.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
[NET]: Make netdev_chain a raw notifier. 2006-05-09T22:23:03+00:00 Alan Stern stern@rowland.harvard.edu 2006-05-09T22:23:03+00:00 f07d5b946510a54937a75a3654941e855ffdc4c2 From: Alan Stern <stern@rowland.harvard.edu> This chain does it's own locking via the RTNL semaphore, and can also run recursively so adding a new mutex here was causing deadlocks. Signed-off-by: David S. Miller <davem@davemloft.net> 
From: Alan Stern <stern@rowland.harvard.edu>

This chain does it's own locking via the RTNL semaphore, and
can also run recursively so adding a new mutex here was causing
deadlocks.

Signed-off-by: David S. Miller <davem@davemloft.net>
[NET]: Create netdev attribute_groups with class_device_add 2006-05-07T00:56:03+00:00 Stephen Hemminger shemminger@osdl.org 2006-05-07T00:56:03+00:00 fe9925b551a95fae6ec61470c79f8b701a2fe928 Atomically create attributes when class device is added. This avoids the race between registering class_device (which generates hotplug event), and the creation of attribute groups. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net> 
Atomically create attributes when class device is added. This avoids
the race between registering class_device (which generates hotplug
event), and the creation of attribute groups.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 2006-04-20T22:26:25+00:00 Linus Torvalds torvalds@g5.osdl.org 2006-04-20T22:26:25+00:00 f4ffaa452e71495a06376f12f772342bc57051fc * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (21 commits) [PATCH] wext: Fix RtNetlink ENCODE security permissions [PATCH] bcm43xx: iw_priv_args names should be <16 characters [PATCH] bcm43xx: sysfs code cleanup [PATCH] bcm43xx: fix pctl slowclock limit calculation [PATCH] bcm43xx: fix dyn tssi2dbm memleak [PATCH] bcm43xx: fix config menu alignment [PATCH] bcm43xx wireless: fix printk format warnings [PATCH] softmac: report when scanning has finished [PATCH] softmac: fix event sending [PATCH] softmac: handle iw_mode properly [PATCH] softmac: dont send out packets while scanning [PATCH] softmac: return -EAGAIN from getscan while scanning [PATCH] bcm43xx: set trans_start on TX to prevent bogus timeouts [PATCH] orinoco: fix truncating commsquality RID with the latest Symbol firmware [PATCH] softmac: fix spinlock recursion on reassoc [PATCH] Revert NET_RADIO Kconfig title change [PATCH] wext: Fix IWENCODEEXT security permissions [PATCH] wireless/atmel: send WEXT scan completion events [PATCH] wireless/airo: clean up WEXT association and scan events [PATCH] softmac uses Wiress Ext. ... 
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (21 commits)
  [PATCH] wext: Fix RtNetlink ENCODE security permissions
  [PATCH] bcm43xx: iw_priv_args names should be <16 characters
  [PATCH] bcm43xx: sysfs code cleanup
  [PATCH] bcm43xx: fix pctl slowclock limit calculation
  [PATCH] bcm43xx: fix dyn tssi2dbm memleak
  [PATCH] bcm43xx: fix config menu alignment
  [PATCH] bcm43xx wireless: fix printk format warnings
  [PATCH] softmac: report when scanning has finished
  [PATCH] softmac: fix event sending
  [PATCH] softmac: handle iw_mode properly
  [PATCH] softmac: dont send out packets while scanning
  [PATCH] softmac: return -EAGAIN from getscan while scanning
  [PATCH] bcm43xx: set trans_start on TX to prevent bogus timeouts
  [PATCH] orinoco: fix truncating commsquality RID with the latest Symbol firmware
  [PATCH] softmac: fix spinlock recursion on reassoc
  [PATCH] Revert NET_RADIO Kconfig title change
  [PATCH] wext: Fix IWENCODEEXT security permissions
  [PATCH] wireless/atmel: send WEXT scan completion events
  [PATCH] wireless/airo: clean up WEXT association and scan events
  [PATCH] softmac uses Wiress Ext.
  ...
[NET]: Add skb->truesize assertion checking. 2006-04-20T07:10:50+00:00 David S. Miller davem@sunset.davemloft.net 2006-04-20T07:10:50+00:00 dc6de33674608f978ec29f5c2f7e3af458c06f78 Add some sanity checking. truesize should be at least sizeof(struct sk_buff) plus the current packet length. If not, then truesize is seriously mangled and deserves a kernel log message. Currently we'll do the check for release of stream socket buffers. But we can add checks to more spots over time. Incorporating ideas from Herbert Xu. Signed-off-by: David S. Miller <davem@davemloft.net> 
Add some sanity checking.  truesize should be at least sizeof(struct
sk_buff) plus the current packet length.  If not, then truesize is
seriously mangled and deserves a kernel log message.

Currently we'll do the check for release of stream socket buffers.

But we can add checks to more spots over time.

Incorporating ideas from Herbert Xu.

Signed-off-by: David S. Miller <davem@davemloft.net>
[PATCH] wext: Fix RtNetlink ENCODE security permissions 2006-04-19T21:25:41+00:00 Jean Tourrilhes jt@hpl.hp.com 2006-04-14T17:47:26+00:00 848ef8555296f25d9226d3bc43ce4028835ed633 I've just realised that the RtNetlink code does not check the permission for SIOCGIWENCODE and SIOCGIWENCODEEXT, which means that any user can read the encryption keys. The fix is trivial and should go in 2.6.17 alonside the two other patch I sent you last week. Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> 
	I've just realised that the RtNetlink code does not check the
permission for SIOCGIWENCODE and SIOCGIWENCODEEXT, which means that
any user can read the encryption keys. The fix is trivial and should
go in 2.6.17 alonside the two other patch I sent you last week.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[PATCH] wext: Fix IWENCODEEXT security permissions 2006-04-19T21:25:38+00:00 Jean Tourrilhes jt@hpl.hp.com 2006-04-04T22:53:43+00:00 a417016d1a07e6df0621dbb2926da82642eca823 Check the permissions when user-space try to read the encryption parameters via SIOCGIWENCODEEXT. This is trivial and probably should go in 2.6.17... Bug was found by Brian Eaton <eaton.lists@gmail.com>, thanks ! Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> 
	Check the permissions when user-space try to read the
encryption parameters via SIOCGIWENCODEEXT. This is trivial and
probably should go in 2.6.17...
	Bug was found by Brian Eaton <eaton.lists@gmail.com>, thanks !

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>