linux-toradex.git/net/core/net-sysfs.c, branch v2.6.37.2

net: zero kobject in rx_queue_release

2010-11-18T17:41:40+00:00

netif_set_real_num_rx_queues() can decrement and increment
the number of rx queues. For example ixgbe does this as
features and offloads are toggled. Presumably this could
also happen across down/up on most devices if the available
resources changed (cpu offlined).

The kobject needs to be zero'd in this case so that the
state is not preserved across kobject_put()/kobject_init_and_add().

This resolves the following error report.

ixgbe 0000:03:00.0: eth2: NIC Link is Up 10 Gbps, Flow Control: RX/TX
kobject (ffff880324b83210): tried to init an initialized object, something is seriously wrong.
Pid: 1972, comm: lldpad Not tainted 2.6.37-rc18021qaz+ #169
Call Trace:
 [] kobject_init+0x3a/0x83
 [] kobject_init_and_add+0x23/0x57
 [] ? mark_lock+0x21/0x267
 [] net_rx_queue_update_kobjects+0x63/0xc6
 [] netif_set_real_num_rx_queues+0x5f/0x78
 [] ixgbe_set_num_queues+0x1c6/0x1ca [ixgbe]
 [] ixgbe_init_interrupt_scheme+0x1e/0x79c [ixgbe]
 [] ixgbe_dcbnl_set_state+0x167/0x189 [ixgbe]

Signed-off-by: John Fastabend 
Acked-by: Eric Dumazet 
Signed-off-by: David S. Miller

rps: add __rcu annotations

2010-10-25T21:18:27+00:00

Add __rcu annotations to :
	(struct netdev_rx_queue)->rps_map
	(struct netdev_rx_queue)->rps_flow_table
	struct rps_sock_flow_table *rps_sock_flow_table;

And use appropriate rcu primitives.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: Fix rxq ref counting

2010-10-08T21:34:32+00:00

The rx->count reference is used to track reference counts to the
number of rx-queue kobjects created for the device.  This patch
eliminates initialization of the counter in netif_alloc_rx_queues
and instead increments the counter each time a kobject is created.
This is now symmetric with the decrement that is done when an object is
released.

Signed-off-by: Tom Herbert 
Acked-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: Allow changing number of RX queues after device allocation

2010-09-28T05:09:49+00:00

For RPS, we create a kobject for each RX queue based on the number of
queues passed to alloc_netdev_mq().  However, drivers generally do not
determine the numbers of hardware queues to use until much later, so
this usually represents the maximum number the driver may use and not
the actual number in use.

For TX queues, drivers can update the actual number using
netif_set_real_num_tx_queues().  Add a corresponding function for RX
queues, netif_set_real_num_rx_queues().

Signed-off-by: Ben Hutchings 
Signed-off-by: David S. Miller

net: make rx_queue sysfs_ops const

2010-09-02T01:12:20+00:00

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

cfg80211: support sysfs namespaces

2010-08-16T19:26:40+00:00

Enable using network namespaces with
wireless devices even when sysfs is
enabled using the same infrastructure
that was built for netdevs.

Signed-off-by: Johannes Berg 
Acked-by: "Eric W. Biederman" 
Signed-off-by: John W. Linville

sysfs: add attribute to indicate hw address assignment type

2010-07-25T03:49:29+00:00

Add addr_assign_type to struct net_device and expose it via sysfs.
This new attribute has the purpose of giving user-space the ability to
distinguish between different assignment types of MAC addresses.

For example user-space can treat NICs with randomly generated MAC
addresses differently than NICs that have permanent (locally assigned)
MAC addresses.
For the former udev could write a persistent net rule by matching the
device path instead of the MAC address.
There's also the case of devices that 'steal' MAC addresses from slave
devices. In which it is also be beneficial for user-space to be aware
of the fact.

This patch also introduces a helper function to assist adoption of
drivers that generate MAC addresses randomly.

Signed-off-by: Stefan Assmann 
Signed-off-by: David S. Miller

net/core: EXPORT_SYMBOL cleanups

2010-07-12T19:57:55+00:00

CodingStyle cleanups

EXPORT_SYMBOL should immediately follow the symbol declaration.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: fix 64 bit counters on 32 bit arches

2010-07-07T21:58:56+00:00

There is a small possibility that a reader gets incorrect values on 32
bit arches. SNMP applications could catch incorrect counters when a
32bit high part is changed by another stats consumer/provider.

One way to solve this is to add a rtnl_link_stats64 param to all
ndo_get_stats64() methods, and also add such a parameter to
dev_get_stats().

Rule is that we are not allowed to use dev->stats64 as a temporary
storage for 64bit stats, but a caller provided area (usually on stack)

Old drivers (only providing get_stats() method) need no changes.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: Enable 64-bit net device statistics on 32-bit architectures

2010-06-12T22:51:22+00:00

Use struct rtnl_link_stats64 as the statistics structure.

On 32-bit architectures, insert 32 bits of padding after/before each
field of struct net_device_stats to make its layout compatible with
struct rtnl_link_stats64.  Add an anonymous union in net_device; move
stats into the union and add struct rtnl_link_stats64 stats64.

Add net_device_ops::ndo_get_stats64, implementations of which will
return a pointer to struct rtnl_link_stats64.  Drivers that implement
this operation must not update the structure asynchronously.

Change dev_get_stats() to call ndo_get_stats64 if available, and to
return a pointer to struct rtnl_link_stats64.  Change callers of
dev_get_stats() accordingly.

Signed-off-by: Ben Hutchings 
Signed-off-by: David S. Miller